CO-ROTATING SCROLL COMPRESSOR

Description

TECHNICAL FIELD

The present invention relates to a co-rotating scroll compressor.

BACKGROUND ART

Patent Literature 1 discloses a known co-rotating scroll compressor. The co-rotating scroll compressor includes a housing, a driving mechanism, a driving scroll, a driven scroll, and a driven mechanism. The housing accommodates the driving mechanism, the driving scroll, the driven scroll, and the driven mechanism.

The driving mechanism includes a rotor. The rotor has a bottom wall portion having a substantially disc shape and a cylindrical portion extending from the bottom wall portion in a direction of a driving axis. The driving scroll has a driving scroll end plate, a driving scroll body, and a driving scroll peripheral wall. The driving scroll body is integrally formed with the driving scroll end plate and has a spirally extending shape extending from the driving scroll end plate toward the driven scroll. The driving scroll peripheral wall cylindrically extends toward the driven scroll. The driving scroll peripheral wall is integrally formed with the driving scroll end plate and surrounds the driving scroll body. The driving scroll peripheral wall is fixed to the cylindrical portion of the rotor, so that the driving scroll is integrated with the rotor. Accordingly, the driving scroll is configured to be driven to rotate by the driving mechanism about the driving axis.

The driven scroll is disposed inside the rotor, more specifically, disposed between the bottom wall portion of the rotor and the driving scroll in the direction of the driving axis. Thus, the driven scroll faces the driving scroll inside the rotor. The driven scroll has a driven scroll end plate and a driven scroll body. The driven scroll end plate faces the driving scroll body and the driving scroll peripheral wall. The driven scroll body is integrally formed with the driven scroll end plate, and has a spirally extending shape extending from the driven scroll end plate toward the driving scroll end plate. The driving scroll body and the driven scroll body face each other to form a compression chamber for compressing fluid.

The driven mechanism is disposed between the bottom wall portion of the rotor and the driven scroll end plate of the driven scroll. Accordingly, the driven scroll is driven by the driving scroll and the driven mechanism so as to rotate about a driven axis of the driving scroll, which is eccentric to the driving axis, so that the driven scroll is capable of orbiting relative to the driving scroll.

This scroll compressor changes the volume of the compression chamber by rotating the driving scroll and the driven scroll about the driving axis and the driven axis, respectively. Accordingly, the fluid is drawn from outside of the driving scroll and the driven scroll into the compression chamber and compressed in the compression chamber. The compressed fluid is discharged from the compression chamber to the outside of the driving scroll and the driven scroll.

CITATION LIST

Patent Literature

Patent Literature 1: Japanese Patent Application Publication No. H07-229480

SUMMARY OF INVENTION

Technical Problem

When such a known co-rotating scroll compressor operates, the driven scroll is unavoidably affected by tilting moment generated by the reaction force of the fluid compressed in the compression chamber, which causes the driven scroll to tilt with respect to the directions of the driving axis and the driven axis. When the driven scroll is tilted by the tilting moment and the driven scroll body and the driving scroll body therefore respectively come into contact with the driving scroll end plate and the driven scroll end plate, the driven scroll tilted by the tilting moment is supported by the driving scroll body and the driven scroll body. This increases the load on the driving scroll body and the driven scroll body, so that the driving scroll body and the driven scroll body become easily damaged. This therefore may cause a decrease in the durability of the co-rotating scroll compressor.

The present invention, which has been made in light of the above-mentioned problem, is directed to providing a co-rotating scroll compressor that has excellent durability.

Solution to Problem

A co-rotating scroll compressor of the present invention comprising: a housing; a driving mechanism; a driving scroll; a driven scroll; and a driven mechanism, wherein

• • the driving scroll is configured to be driven to rotate by the driving mechanism about a driving axis,
  • the driven scroll is eccentric to the driving scroll, and configured to be rotated by the driving scroll and the driven mechanism about a driven axis,
  • the driving scroll has: a driving scroll end plate extending in a direction intersecting the driving axis; a driving scroll peripheral wall having a cylindrically extending shape extending from the driving scroll end plate toward the driven scroll; and a driving scroll body disposed inside the driving scroll peripheral wall and having a spirally extending shape extending from the driving scroll end plate toward the driven scroll,
  • the driven scroll has: a driven scroll end plate extending in a direction intersecting the driven axis; and a driven scroll body having a spirally extending shape extending from the driven scroll end plate toward the driving scroll, and
  • the driving scroll body and the driven scroll body face each other to form a compression chamber, and are rotated to change a volume of the compression chamber, wherein
• the driving scroll has a cover body fixed to the driving scroll peripheral wall,
• the driven scroll end plate is rotatably disposed between the driving scroll peripheral wall and the cover body, and
• the driven scroll end plate is contactable with the driving scroll peripheral wall, and when the driven scroll end plate is in contact with the driving scroll peripheral wall, a gap is formed between the driven scroll body and the driving scroll end plate and a gap is formed between the driving scroll body and the driven scroll end plate to prevent the driven scroll body and the driving scroll body from coming into contact with the driving scroll end plate and the driven scroll end plate, respectively.

In the co-rotating scroll compressor of the present invention, the driven scroll end plate is rotatably disposed between the driving scroll peripheral wall and the cover body. The driven scroll end plate is contactable with the driving scroll peripheral wall. In the co-rotating scroll compressor of the present invention, when the driven scroll end plate is in contact with the driving scroll peripheral wall, a gap is formed between the driven scroll body and the driving scroll end plate and a gap is formed between the driving scroll body and the driven scroll end plate to prevent the driven scroll body and the driving scroll body from coming into contact with the driving scroll end plate and the driven scroll end plate, respectively.

This configuration prevents the driven scroll body and the driving scroll body from coming into contact with the driving scroll end plate and the driven scroll end plate, respectively, even if the driven scroll is tilted by the tilting moment and the driven scroll end plate therefore comes into contact with the driving scroll peripheral wall when the co-rotating scroll compressor operates.

Thus, the co-rotating scroll compressor allows the driving scroll peripheral wall and the driven scroll end plate to suitably support the tilting moment acting on the driven scroll. Furthermore, the co-rotating scroll compressor does not need to support the driven scroll, which is tilted by the tilting moment, by the driving scroll body and the driven scroll body, thereby eliminating the large load on the driving scroll body and the driven scroll body. Accordingly, the co-rotating scroll compressor prevents the damage to the driving scroll body and the driven scroll body, i.e., the driving scroll and the driven scroll.

Therefore, the co-rotating scroll compressor of the present invention has excellent durability.

In the co-rotating scroll compressor, the driven scroll body is disposed between the driving scroll peripheral wall and the cover body, which facilitates positioning of the driven scroll relative to the driving scroll. This co-rotating scroll compressor therefore facilitates manufacturing of the compressor.

A plurality of through holes may be formed in a peripheral portion of the driven scroll end plate. It is preferable that a spacer is disposed in each of the through holes to position the driven scroll end plate between the driving scroll peripheral wall and the cover body so that the driven scroll end plate is rotatable.

The presence of the spacer allows the driven scroll end plate to be rotatably disposed between the driving scroll peripheral wall and the cover body, thereby facilitating the manufacturing.

The driving mechanism may include a rotor that has a cylindrical shape, surrounds the driving scroll peripheral wall from an outer peripheral side of the driving scroll peripheral wall, and is fixed to the driving scroll peripheral wall. It is preferable that the driven scroll end plate has a diameter greater than a diameter of the rotor.

An increase in the diameter of the driven scroll end plate may reduce the load, which is generated when the driven scroll end plate comes into contact with the driving scroll peripheral wall and causes the tilting moment that acts on the driven scroll end plate. This further increases the durability of the co-rotating scroll compressor.

In the co-rotating scroll compressor, the driven scroll end plate protrudes radially outward beyond the driving scroll peripheral wall with the driven scroll end plate disposed between the driving scroll peripheral wall and the cover body. This configuration allows the driven scroll end plate to be positioned between the driving scroll peripheral wall and the cover body during the manufacturing of the co-rotating scroll compressor, thereby facilitating the positioning of the driven scroll relative to the driving scroll.

Advantageous Effects of Invention

Therefore, the co-rotating scroll compressor of the present invention has excellent durability.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a cross-sectional view of a co-rotating scroll compressor of an embodiment.

FIG. 2 is a cross-sectional view of the co-rotating scroll compressor according to the embodiment taken along line II-II in FIG. 1, illustrating a housing, a cover body, and the like.

FIG. 3 is an enlarged cross-sectional view of main parts of the co-rotating scroll compressor according to the embodiment, illustrating a driving scroll peripheral wall, the cover body, a space, and the like.

FIG. 4 is a cross-sectional view of the co-rotating scroll compressor according to the embodiment in the same direction as the direction in FIG. 2, illustrating a driven scroll end plate, and the like.

FIG. 5 is a cross-sectional view of the co-rotating scroll compressor according to the embodiment in the same direction as the direction in FIG. 2, illustrating the housing, the cover body, the driven scroll end plate, and the like.

FIG. 6 is an enlarged cross-sectional view of the main parts of the co-rotating scroll compressor according to the embodiment, similar to FIG. 3, illustrating the driving scroll peripheral wall fixed to the cover body with the driven scroll end plate disposed between the driving scroll peripheral wall and the cover body.

FIG. 7 is an enlarged cross-sectional view of the co-rotating scroll compressor according to the embodiment taken along line VII-VII in FIG. 5, illustrating the driving scroll, the driven scroll, and the like in a state where the driven scroll is tilted by tilting moment.

FIG. 8 is an enlarged cross-sectional view of main parts of a co-rotating scroll compressor according to a comparative example, similar to FIG. 6, illustrating a driving scroll peripheral wall fixed to a cover body with a driven scroll end plate disposed between the driving scroll peripheral wall and the cover body.

FIG. 9 is an enlarged cross-sectional view of the main parts of the co-rotating scroll compressor according to the comparative example, similar to FIG. 7, illustrating a driving scroll, a driven scroll, and the like in a state where the driven scroll is tilted by tilting moment.

DESCRIPTION OF EMBODIMENTS

The following will describe an embodiment of the present invention in detail with reference to the accompanying drawings. The co-rotating scroll compressor according to the embodiment (hereinafter simply referred to as the compressor) is mounted to a vehicle (not illustrated), and serves as a component of an air conditioning system of the vehicle.

The compressor according to the embodiment includes a housing 6, an electric motor 10, a driving scroll 30, a driven scroll 40, and a driven shaft 16 illustrated in FIG. 1, and a driven mechanism 20 illustrated in FIG. 5. The electric motor 10 serves as the driving mechanism of the present invention, for example.

In the embodiment, the front-rear direction of the compressor is defined by the arrow in FIG. 1. Also, one radial side and the other radial side along the radial direction of a driven scroll end plate 41, i.e., the driven scroll 40, is defined by the arrow in FIG. 2. The directions of the compressor, such as the front-rear direction, and one and the other radial sides of the driven scroll end plate 41 along the radial direction in FIG. 3 and later correspond to the directions and sides defined in FIGS. 1 and 2. It is noted that the directions are an example for convenience of explanation, and a posture of the compressor may be changed, as appropriate, depending on the vehicle on which the compressor is mounted.

As illustrated in FIG. 1, the housing 6 includes a housing body 60, a bearing housing 61, and a housing cover 62. The housing body 60, the bearing housing 61, and the housing cover 62 are made of aluminum alloy.

The housing body 60 is a bottomed tubular member, and has a first outer peripheral wall 60a and a rear wall 60b. The first outer peripheral wall 60a has a cylindrical shape centered around a driving axis O1. The driving axis O1 is parallel to the front-rear direction.

The first outer peripheral wall 60a has an inner peripheral surface 601. The first outer peripheral wall 60a has an intake communication port 68. The intake communication port 68 extends in the radial direction of the housing body 60. The intake communication port 68 is connected to an evaporator (not illustrated) via piping (not illustrated).

The rear wall 60b is located at the rear end of the housing body 60. The rear wall 60b has a substantially circular plate shape and is perpendicular to the driving axis O1. The outer peripheral edge of the rear wall 60b is connected to the rear end of the first outer peripheral wall 60a. The intake communication port 68 may be formed in the rear wall 60b.

The rear wall 60b has a first support portion 64 at a center of an inner surface of the rear wall 60b. The first support portion 64 has a substantially cylindrical shape centered around the driving axis O1, and extends frontward from the center of the inner surface of the rear wall 60b into the suction chamber 65. A first plain bearing 51 is provided on the first support portion 64.

The first support portion 64 has a pin hole 4. As illustrated in FIG. 2, the pin hole 4 is formed in the first support portion 64 at a position eccentric to the driving axis O1. As illustrated in FIG. 1, the pin hole 4 opens onto a front end surface of the first support portion 64, and extends in the first support portion 64 straight and rearward. The pin hole 4 is not formed through the first support portion 64 in the front-rear direction. The rear end of the pin hole 4 is located within the first support portion 64.

The bearing housing 61 is located in front of the housing body 60. The bearing housing 61 has a substantially circular flat plate shape and is perpendicular to the driving axis O1. The peripheral edge of the bearing housing 61 is in contact with the front end of the first outer peripheral wall 60a of the housing body 60.

The bearing housing 61 has, at a center, a second support portion 66 having a cylindrical shape centered around the driving axis O1. A second plain bearing 52 is disposed in the second support portion 66. Instead of the first plain bearing 51 and the second plain bearing 52, the first support portion 64 and the second support portion 66 may have ball bearings or the like.

The housing cover 62 is disposed in front of the bearing housing 61. The housing cover 62 is a bottomed tubular member, and has a second outer peripheral wall 62a and a front wall 62b. The second outer peripheral wall 62a has a cylindrical shape centered around the driving axis O1, and extends in the direction of the driving axis O1. The length of the second outer peripheral wall 62a is shorter than the length of the first outer peripheral wall 60a of the housing body 60 in the direction of the driving axis O1.

The front wall 62b is located at the front end of the housing cover 62. The front wall 62b has a substantially circular plate shape and is perpendicular to the driving axis O1. The outer peripheral edge of the front wall 62b is connected to the front end of the second outer peripheral wall 62a. The front wall 62b has a discharge communication port 69. The discharge communication port 69 extends in the direction of the driving axis O1. The discharge communication port 69 may be formed in the second outer peripheral wall 62a.

The rear end of the second outer peripheral wall 62a of the housing cover 62 is in contact with the front end of the bearing housing 61, which is located on the side of the housing body 60 opposite to the first outer peripheral wall 60a. In the housing 6, the bearing housing 61 is in contact with the first outer peripheral wall 60a and the second outer peripheral wall 62a, and the housing cover 62, the bearing housing 61, and the housing body 60 are fixed each other by bolts (not illustrated) in the direction of the driving axis O1.

In such a manner, the housing body 60 of the housing 6 is closed by the bearing housing 61 on the front side to form a suction chamber 65 in the housing body 60. The housing cover 62 of the housing 6 is closed by the bearing housing 61 on the rear side to form a discharge communication chamber 13 in the housing cover 62. That is, in the housing 6, the suction chamber 65 and the discharge communication chamber 13 are defined by the bearing housing 61. The suction chamber 65 is connected to the intake communication port 68. This configuration allows a refrigerant gas to be introduced into the suction chamber 65 from the outside of the housing 6 through the intake communication port 68. The refrigerant gas serves as the fluid of the present invention, for example. The discharge communication chamber 13 is connected to the discharge communication port 69.

The electric motor 10 is accommodated in the suction chamber 65. The suction chamber 65 serves as a motor chamber in which the electric motor 10 is accommodated.

The electric motor 10 includes a stator 17 and a rotor 11. The stator 17 has a cylindrical shape centered around the driving axis O1, and extends in the direction of the driving axis O1. The stator 17 has a winding 17a. The stator 17 is fitted into an inner peripheral surface 601 of the first outer peripheral wall 60a, so that the stator 17 is fixed to the housing body 60, i.e., the housing 6.

The rotor 11 has a cylindrical shape centered around the driving axis O1, and extends in the direction of the driving axis O1. The rotor 11 has a diameter smaller than a diameter of the stator 17, and is disposed in the stator 17. Although a detailed illustration is omitted, the rotor 11 is formed of a plurality of permanent magnets corresponding to the stator 17 and stacking steel plates for fixing the permanent magnets. The rotor 11 surrounds the driving scroll peripheral wall 35 from the outer peripheral side of the driving scroll peripheral wall 35 and is fixed to the driving scroll peripheral wall 35.

The driving scroll 30 is made of metal, such as aluminum alloy. The driving scroll 30 is accommodated in the suction chamber 65. The driving scroll 30 has a driving scroll end plate 31, a driving scroll body 33, a driving scroll peripheral wall 35, and a cover body 37.

The driving scroll end plate 31 has an end plate portion 31a and a boss portion 31b. The end plate portion 31a has a substantially disc shape, and is perpendicular to the driving axis O1 and a driven axis O2 (i.e., extends in a direction intersecting the driving axis O1). The driven axis O2 is eccentric and parallel to the driving axis O1. That is, the driven axis O2 is parallel to the front-rear direction.

The end plate portion 31a has, on the opposite sides, a first front surface 311 facing the bearing housing 61 in the suction chamber 65 and a first rear surface 312, respectively.

The boss portion 31b is integrated with the end plate portion 31a. The boss portion 31b is located in the center of the driving scroll end plate 31, and cylindrically extends frontward from the first front surface 311 in the direction of the driving axis O1. The discharge chamber 38 is located in the boss portion 31b. The discharge chamber 38 extends into the end plate portion 31a from the front end of the boss portion 31b. The shape of the discharge chamber 38 may be designed as appropriate.

The discharge chamber 38 is connected to a discharge port 32 formed through the end plate portion 31a. The discharge port 32 is formed through the end plate portion 31a in the direction of the driving axis O1. In the discharge chamber 38, a discharge reed valve 57 and a retainer 58 are fixed to the discharge chamber 38 by a fixing bolt 59. The discharge reed valve 57 opens and closes the discharge port 32, and the retainer 58 adjusts the opening degree of the discharge reed valve 57.

The driving scroll body 33 is integrated with the end plate portion 31a of the driving scroll end plate 31, and extends rearward from the first rear surface 312 of the end plate portion 31a toward the driven scroll 40 and parallel to the driving axis O1 and the driven axis O2 inside the driving scroll peripheral wall 35. The driving scroll body 33 has a spirally extending shape centered around the center of the end plate portion 31a, i.e., the driving scroll end plate 31 and radially and outwardly extending from the center of the spiral shape. As illustrated in FIGS. 3, 6, and 7, the driving scroll body 33 has a rear end surface 330.

As illustrated in FIG. 1, the driving scroll peripheral wall 35 has a cylindrical shape centered around the driving axis O1, and extends parallel to the driving axis O1 and the driven axis O2.

The driving scroll peripheral wall 35 has a first opposing surface 351. The first opposing surface 351 is located at the rear end of the driving scroll peripheral wall 35. The driving scroll peripheral wall 35 has three bolt holes 35c. The bolt holes 35c open onto the first opposing surface 351, and extend frontward in the driving scroll peripheral wall 35. FIG. 3 illustrates one of the three bolt holes 35c. The number of the bolt holes 35c may be designed as appropriate.

The front end of the driving scroll peripheral wall 35 is integrated with the outer peripheral edge of the end plate portion 31a on the side opposite to the first opposing surface 351. That is, the driving scroll peripheral wall 35 cylindrically extends rearward (toward the driven scroll 40) from the first rear surface 312 of the driving scroll end plate 31. The driving scroll peripheral wall 35 is located radially outward of the driving scroll body 33 and surrounds the driving scroll body 33. The extension length of the driving scroll peripheral wall 35 extending rearward from the first rear surface 312 of the driving scroll end plate 31 is longer than the extension length of the driving scroll body 33 extending rearward from the first rear surface 312 of the driving scroll end plate 31. That is, the first opposing surface 351 is separated rearward from the driving scroll end plate 31 beyond the rear end surface 330 of the driving scroll body 33 (see FIG. 3). Although the illustration is omitted, the outer peripheral end of the driving scroll body 33 is connected to the inner peripheral surface of the driving scroll peripheral wall 35.

As illustrated in FIGS. 1 and 2, the cover body 37 has a cover portion 37a and a boss portion 37b. The cover portion 37a has a substantially disc shape and is perpendicular to the driving axis O1 and the driven axis O2. As illustrated in FIG. 1, the cover portion 37a has the substantially same diameter as the diameter of the end plate portion 31a and the driving scroll peripheral wall 35.

As illustrated in FIGS. 3, 6, and 7, the cover portion 37a has a second opposing surface 371 and a rear end surface 372. The second opposing surface 371 is located at the front end of the cover portion 37a and serves as the front end surface of the cover portion 37a. The rear end surface 372 is located on the side opposite to the second opposing surface 371.

As illustrated in FIG. 2, the cover portion 37a has a first suction port 37c and three bolt holes 37d. The first suction port 37c and the bolt holes 37d are formed through the cover portion 37a from the second opposing surface 371 to the rear end surface 372. The first suction port 37c has a diameter greater than a diameter of each of the bolt holes 37d. The shape and number of the first suction port 37c and the bolt holes 37d may be designed as appropriate.

The cover portion 37a includes six anti-rotation pins 21. Each of the anti-rotation pins 21 is inserted into and fixed to a fixing hole (not illustrated) formed in the second opposing surface 371, and extends frontward from the second opposing surface 371.

As illustrated in FIG. 1, the boss portion 37b is integrated with the cover portion 37a in the center of the cover portion 37a, and extends rearward from the cover portion 37a in the direction of the driving axis O1. The boss portion 37b has an insertion hole 37e. The insertion hole 37e is formed through the boss portion 37b and the cover portion 37a in the direction of the driving axis O1. The boss portion 37b has a cylindrical shape centered around the driving axis O1.

The driving scroll peripheral wall 35 is pressed into the rotor 11, so that the driving scroll 30 is integrated with the rotor 11. As illustrated in FIG. 3, in the driving scroll 30, the cover body 37 is located behind the driving scroll body 33 and the driving scroll peripheral wall 35. That is, the cover body 37 is disposed such that the driving scroll body 33 and the driving scroll peripheral wall 35 are disposed between the cover body 37 and the driving scroll end plate 31. The second opposing surface 371 of the cover body 37 faces the driving scroll body 33 and the driving scroll peripheral wall 35.

In the driving scroll 30, the cover body 37 is separated from the driving scroll body 33 and the driving scroll peripheral wall 35 in the direction of the driving axis O1. Accordingly, a space 14 is formed between the driving scroll peripheral wall 35 and the cover body 37, more specifically, between a flange portion 35b of the driving scroll peripheral wall 35 and the cover portion 37a of the cover body 37. The space 14 has a length, which serves as a first length L1, in the direction of the driving axis O1.

In the driving scroll 30, the first opposing surface 351 of the flange portion 35b and the second opposing surface 371 of the cover portion 37a face each other via the space 14 in the direction of the driving axis O1. In other words, the first opposing surface 351 faces the second opposing surface 371 and is separated from the second opposing surface 371 by a distance corresponding to the first length L1 of the space 14. As illustrated in FIGS. 1 and 5 to 7, the cover body 37 is fixed to the driving scroll peripheral wall 35 by three bolts 71. Further details about fixing the cover body 37 to the driving scroll peripheral wall 35 will be described later.

The driven scroll 40 illustrated in FIG. 1 is made of aluminum alloy. The driven scroll 40 has a driven scroll end plate 41 and a driven scroll body 43.

As illustrated in FIGS. 1 and 4, the driven scroll end plate 41 has a substantially disc shape, and is perpendicular to the driving axis O1 and the driven axis O2 (i.e., extends in a direction intersecting the driven axis O2). As illustrated in FIG. 6, the driven scroll end plate 41 has a thickness serving as a second length L2. The second length L2 is shorter than the first length L1 of the space 14 in the direction of the driving axis O1.

As illustrated in FIGS. 1 and 7, the driven scroll end plate 41 has a diameter greater than diameters of the driving scroll peripheral wall 35, the cover body 37, and the rotor 11. The driven scroll end plate 41 has, on the opposite sides of the driven scroll end plate 41, a second front surface 411 and a second rear surface 412, respectively.

As illustrated in FIG. 4, the driven scroll end plate 41 has a plurality of through holes 41a (in the present embodiment, three through holes 41a) and six mounting recesses 41b. As illustrated in FIGS. 1, 6, and 7, each of the through holes 41a has a cylindrical shape, and is formed through a peripheral portion of the driven scroll end plate 41 from the second front surface 411 to the second rear surface 412, i.e., located at a position radially outward of the driven scroll body 43. As illustrated in FIG. 4, the through holes 41a are spaced at equal intervals in the circumferential direction of the driven scroll end plate 41.

Each of the mounting recesses 41b is located between the through holes 41a in the circumferential direction of the driven scroll end plate 41. The mounting recess 41b has a cylindrical shape, and is formed frontward in the second rear surface 412. That is, the mounting recess 41b is not formed through the driven scroll end plate 41. A ring 22 is fitted in the mounting recess 41b.

The driven scroll end plate 41 has a second suction port 41c and an accommodation portion 41d. The second suction port 41c is located between the two mounting recesses 41b. Similar to the through hole 41a, the second suction port 41c is arranged in the peripheral portion of the driven scroll end plate 41 at a position radially outward of the driven scroll body 43, and the second suction port 41c has a cylindrical shape and is formed through the driven scroll end plate 41 from the second front surface 411 to the second rear surface 412 (see FIG. 7). The second suction port 41c has a diameter that is greater than a diameter of the first suction port 37c illustrated in FIG. 2 and the substantially same as a diameter of the through hole 41a (see FIG. 4). The shape of the second suction port 41c may be designed as appropriate.

The accommodation portion 41d is located in the center of the driven scroll end plate 41. The accommodation portion 41d has a cylindrical shape centered around the driven axis O2, and is recessed frontward from the second rear surface 412 of the driven scroll end plate 41.

A bushing 53 is accommodated in the accommodation portion 41d. A driven pin 55 is inserted into the bushing 53. The driven pin 55 is inserted into the bushing 53 at the center of the bushing 53, i.e., at a position eccentric to the driven axis O2. The driven pin 55 is made of steel, and has a cylindrical shape. The driven pin 55 protrudes rearward from the bushing 53, i.e., the driven scroll end plate 41. The bushing and the driven pin 55 cooperate to form the driven shaft 16. The bushing 53 may be accommodated in the accommodation portion 41d via a bearing, such as a plain bearing.

The driven scroll end plate 41 has three metal spacers 18 to position the driven scroll end plate 41 between the driving scroll peripheral wall 35 and the cover body 37 so that the driven scroll end plate 41 is rotatable. Each of the spacers 18 has a diameter smaller than a diameter of the through hole 41a, and is disposed in the through hole 41a. The spacers 18 have the same cylindrical shape, and the bolts 71 are inserted into the spacers 18, respectively. The spacers 18 extend in the direction of the driving axis O1. As illustrated in FIG. 6, the length of each of the spacers 18 in the direction of the driving axis O1 is the first length L1. The spacer 18 may be made of resin.

The driven scroll end plate 41 has a thickness serving as the second length L2. The spacer 18 protrudes from the through hole 41a in the direction of the driving axis O1 by the difference in length between the first length L1 and the second length L2.

As illustrated in FIG. 1, the driven scroll body 43 is integrated with the driven scroll end plate 41, and extends frontward from the second front surface 411 of the driven scroll end plate 41 toward the driving scroll end plate 31 of the driving scroll 30 and parallel to the driving axis O1 and the driven axis O2. The driven scroll body 43 has a spirally extending shape centered around the center of the driven scroll end plate 41 and radially and outwardly extending from the center of the spiral shape. As illustrated in FIGS. 6 and 7, the driven scroll body 43 has a front end surface 430.

The extension length of the driven scroll body 43 extending frontward from the second front surface 411 of the driven scroll end plate 41 is equal to the extension length of the driving scroll body 33 extending rearward from the first rear surface 312 of the driving scroll end plate 31. Accordingly, the extension length of the driving scroll peripheral wall 35 extending rearward from the first rear surface 312 of the driving scroll end plate 31 is longer than the extension length of the driven scroll body 43 extending frontward from the second front surface 411 of the driven scroll end plate 41.

As illustrated in FIG. 5, the driven mechanism 20 includes the six anti-rotation pins 21 and the six rings 22. The number of the anti-rotation pins 21 and the number of the rings 22 may be designed as appropriate as long as each of them is three or more.

In this compressor, the driving scroll 30 and the driven scroll 40 are assembled so that the cover body 37 is separated from the driving scroll body 33 and the driving scroll peripheral wall 35 in the direction of the driving axis O1. This configuration allows the space 14 to be formed between the flange portion 35b of the driving scroll peripheral wall 35 and the cover portion 37a of the cover body 37 (see FIG. 3).

In the driven scroll 40, the spacer 18 is disposed in the through hole 41a of the driven scroll end plate 41. As illustrated in FIG. 6, the second front surface 411 of the driven scroll end plate 41 and the driven scroll body 43 face the driving scroll end plate 31, and a peripheral portion of the driven scroll end plate 41, which is radially outward of the driven scroll body 43 with the spacers 18 and the through holes 41a, is placed in the space 14. Accordingly, the driven scroll end plate 41 is rotatably disposed between the driving scroll peripheral wall 35 and the cover body 37.

The diameter of the driven scroll end plate 41 is greater than the diameters of the driving scroll peripheral wall 35, the cover body 37, and the rotor 11, so that a part of the driven scroll end plate 41, i.e., the peripheral portion of the driven scroll end plate 41, extends outward of the driving scroll peripheral wall 35 and the cover body 37 in the radial direction of the driven scroll end plate 41, as illustrated in FIG. 7, with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37. This configuration in which the driven scroll end plate 41 is positioned between the driving scroll peripheral wall 35 and the cover body 37 allows the driving scroll body 33 and the driven scroll body 43 to mesh each other. The driving scroll body 33 and the driven scroll body 43 face each other to form a compression chamber 12. As illustrated in FIG. 5, the anti-rotation pin 21 is placed in the ring 22.

The bolt hole 35c of the driving scroll peripheral wall 35, the bolt hole 37d of the cover body 37, and the spacer 18 are aligned in the direction of the driving axis O1 with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37. As illustrated in FIGS. 5 and 6, the bolt 71 is inserted from the rear end surface 372 of the cover body 37 into the bolt hole 37d, the spacer 18, and the bolt hole 35c, so that the cover body 37 is fixed to the driving scroll peripheral wall 35 by the bolt 71 in the direction of the driving axis O1. The cover body 37 is fixed to the driving scroll peripheral wall 35 by the bolt 71 in such a manner, so that the first suction port 37c of the cover body 37 is connected to the second suction port 41c of the driven scroll end plate 41 in the direction of the driving axis O1. The first suction port 37c and the second suction port 41c are connected to the compression chamber 12.

In such a manner, the driving scroll 30 and the driven scroll 40 are assembled with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37, so that the driving scroll 30 and the driven scroll 40 cooperate to form a scroll compression part 100. The driven scroll end plate 41 moves in the through hole 41a relative to the spacer 18 through which the bolt 71 is inserted so that the driven scroll 40 is rotate about the driven axis O2 relative to the driving scroll 30.

As illustrated in FIG. 6, the spacer 18 has a length corresponding to the first length L1 in the direction of the driving axis O1, and the front end and the rear end of the spacer 18 are in contact with the first opposing surface 351 of the driving scroll peripheral wall 35 and the second opposing surface 371 of the cover body 37, respectively, with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37. This configuration uniformly sets the distance between the first opposing surface 351 and the second opposing surface 371, i.e., the length of the space 14 in the direction of the driving axis O1, to the first length L1.

The driven scroll end plate 41 has a thickness serving as the second length L2 that is shorter than the first length L1. The difference in length between the first length L1 and the second length L2 allows the first opposing surface 351, the second opposing surface 371, and the driven scroll end plate 41 to cooperate to define a first gap S1 in the space 14 in a state where the driving scroll 30 and the driven scroll 40 are assembled.

More specifically, the first gap S1 consists of a gap S11 formed between the first opposite surface 351 and the second front surface 411 of the driven scroll end plate 41 in the direction of the driving axis O1 and a gap S12 formed between the second opposing surface 371 and the second rear surface 412 of the driven scroll end plate 41 in the direction of the driving axis O1. When the driven scroll end plate 41 is located in the center of the space 14 in the direction of the driving axis O1, the gap S11 and the gap S12 have the same length and each is half the length of the first gap S1. When the driven scroll end plate 41 approaches the first opposing surface 351 in the space 14, the length of the gap S11 decreases and the length of the gap S12 therefore increases. When the second front surface 411 comes into contact with the first opposing surface 351, the length of the gap S12 reaches its maximum as the length of the gap S11 decreases to zero, so that only the gap S12 forms the first gap S1. When the second rear surface 412 comes into contact with the second opposing surface 371, the length of the gap S11 reaches its maximum as the length of the gap S12 decreases to zero, so that only the gap S11 forms the first gap S1.

In a state where the driving scroll 30 and the driven scroll 40 are assembled, the first rear surface 312 of the driving scroll end plate 31 and the front end surface 430 of the driven scroll body 43 cooperate to define a second gap S2 in the direction of the driving axis O1. Similarly, the second front surface 411 of the driven scroll end plate 41 and the rear end surface 330 of the driving scroll body 33 cooperate to define a third gap S3 in the direction of the driving axis O1.

The extension length of the driving scroll body 33 extending rearward from the first rear surface 312 of the driving scroll end plate 31 is equal to the extension length of the driven scroll body 43 extending frontward from the second front surface 411 of the driven scroll end plate 41. The extension lengths of the driving scroll body 33 and the driven scroll body 43 are shorter than the extension length of the driving scroll peripheral wall 35 extending rearward from the first rear surface 312 of the driving scroll end plate 31. Accordingly, in the compressor, the second gap S2 and the third gap S3 have the same length, and each of the lengths of the second gap S2 and the third gap S3 is longer than the length of the first gap S1. In the figures, such as FIG. 6, the first to third gaps S1 to S3 are illustrated by exaggeration to facilitate explanation.

After the driving scroll 30 and the driven scroll 40 are assembled, the first plain bearing 51 is inserted into the insertion hole 37e of the cover body 37 of the driving scroll 30 as illustrated in FIG. 1. The boss portion 37b, i.e., the cover body 37 is rotatably supported by the first support portion 64 via the first plain bearing 51. The boss portion 31b of the driving scroll end plate 31 of the driving scroll 30 is inserted into the second plain bearing 52. The driving scroll end plate 31 is rotatably supported by the second support portion 66 via the second plain bearing 52. Accordingly, the driving scroll 30 is disposed in the suction chamber 65 and supported by the first support portion 64 and the second support portion 66 of the housing 6 so that the driving scroll 30 is rotatable about the driving axis O1.

The discharge chamber 38 is connected to the discharge communication chamber 13 by the boss portion 31b inserted into the second plain bearing 52. Accordingly, the discharge chamber 38 is connected to the outside of the housing 6 through the discharge communication chamber 13 and the discharge communication port 69.

In the driven scroll 40, the driven pin 55 is inserted into the pin hole 4 of the first support portion 64. Accordingly, the driven scroll 40 is disposed in the suction chamber 65 and supported by the first support portion 64 so that the driven scroll 40 is rotated by the driven shaft 16 about the driven axis O2. That is, unlike the driving scroll 30, the driven scroll 40 is supported only by the first support portion 64 of the housing 6 so that the driven scroll 40 is rotatable about the driven axis O2.

In the compressor having such a configuration, the refrigerant gas at low temperature and low pressure is drawn from the evaporator into the suction chamber 65 through the intake communication port 68. The driving scroll 30 is rotated about the driving axis O1 in the suction chamber 65 by the rotation of the rotor 11 operated by the electric motor 10. That is, the driving scroll 30 and the rotor 11 are rotated together. In the driven mechanism 20, each of the anti-rotation pins 21 slides on the inner peripheral surface of the ring 22 and allows the ring 22 to rotate around and relative to the center of the anti-rotation pin 21. Thus, the driven mechanism 20 transmits torque of the driving scroll 30 to the driven scroll 40.

The driven scroll 40 is eccentric to the driving scroll 30, and rotates around the driven axis O2 by the driving scroll 30 and the driven mechanism 20. The driven mechanism 20 prevents the driven scroll 40 from rotating on its own axis. Accordingly, the driven scroll 40 orbits relative to the driving scroll 30 around the driven axis O2.

In a state where the driven scroll end plate 41 is positioned between the driving scroll peripheral wall 35 and the cover body 37, the first gap S1 is defined by the first opposing surface 351, the second opposing surface 371, and the driven scroll end plate 41. This configuration of the compressor prevents interference between the driving scroll peripheral wall 35, the cover body 37, and the driven scroll end plate 41, when the driven scroll 40 orbits around the driven axis O2.

The driving scroll 30 and the driven scroll 40 are both rotated to change the volume of the compression chamber 12. This causes the refrigerant gas in the suction chamber 65 to be drawn into the compression chamber 12 through the first suction port 37c and the second suction port 41c. The refrigerant gas drawn into the compression chamber 12 is compressed in the compression chamber 12 while flowing from the peripheral portions of the driving scroll body 33 and the driven scroll body 43 toward the centers of the driving scroll body 33 and the driven scroll body 43. The refrigerant gas that has been compressed to a discharge pressure in the compression chamber 12 is discharged to the discharge chamber 38 through the discharge port 32, and further discharged to the condenser through the discharge communication chamber 13 and the discharge communication port 69. In this manner, air conditioning is performed by the vehicle air conditioner.

When the compressor operates, the driven scroll 40 is unavoidably affected by tilting moment generated by the reaction force of the refrigerant gas compressed in the compression chamber 12, which causes the driven scroll 40 to tilt with respect to the directions of the driving axis O1 and the driven axis O2. In this regard, this compressor prevents the front end portion of the driven scroll body 43 including the front end surface 430 from coming into contact with the first rear surface 312 of the driving scroll end plate 31, even if the driven scroll 40 is tilted by the tilting moment. Also, this compressor prevents the rear end portion of the driving scroll body 33 including the rear end surface 330 from coming into contact with the second front surface 411 of the driven scroll end plate 41. The following will describe these preventions by contrast with a compressor of a comparative example.

As illustrated in FIG. 8, in the compressor of the comparative example, the driven scroll end plate 41 is disposed between the driving scroll peripheral wall 35 and the cover body 37 when the driving scroll 30 and the driven scroll 40 are assembled, similar to the compressor of the embodiment of the present invention. The driving scroll 30 and the driven scroll 40 of the compressor of the comparative example have a driving scroll body 34 and a driven scroll body 44, respectively.

In a state where the driving scroll 30 and the driven scroll 40 of the compressor of the comparative example are assembled, the first rear surface 312 of the driving scroll end plate 31 and a front end surface 440 of the driven scroll body 44 cooperate to define a fourth gap S4 in the direction of the driving axis O1. The second front surface 411 of the driven scroll end plate 41 and a rear end surface 340 of the driving scroll body 34 cooperate to define a fifth gap S5 in the direction of the driving axis O1.

The extension lengths of the driving scroll body 34 and the driven scroll body 44 are longer than the extension lengths of the driving scroll body 33 and the driven scroll body 43 of the compressor of the embodiment of the present invention in the direction of the driving axis O1. That is, the extension length of the driving scroll body 34 extending rearward from the first rear surface 312 is longer than the extension length of the driving scroll body 33 of the compressor according to the embodiment of the present invention, and the extension length of the driven scroll body 44 extending frontward from the second front surface 411 is longer than the extension length of the driven scroll body 43 of the compressor of the embodiment of the present invention. The extension lengths of the driving scroll body 34 and the driven scroll body 44 are longer than the extension lengths of the driving scroll body 33 and the driven scroll body 44 of the compressor of the embodiment of the present invention extending rearward from the first rear surface 312 of the driving scroll end plate 31.

Accordingly, the lengths of the fourth gap S4 and the fifth gap S5 of the compressor of the comparative example are respectively shorter than the lengths of the second gap S2 and the third gap S3 of the compressor of the embodiment of the present invention. The fourth gap S4 and the fifth gap S5 of the compressor of the comparative example have the same length. Each of the lengths of the fourth gap S4 and the fifth gap S5 is shorter than the first gap S1 (the sum of the gap S11 between the first opposing surface 351 and the second front surface 411 and the gap S12 between the second opposing surface 371 and the second rear surface 412). It is to be noted that, other components of the compressor of the comparative example are the same as those of the first embodiment of the present invention, and components of the comparative example that correspond to those of the embodiment of the present invention are designated by the same reference numerals and will not be further elaborated here. In FIG. 8, the fourth gap S4 and the fifth gap S5 are illustrated by exaggeration to facilitate explanation.

In the compressor of the comparative example, as illustrated in FIG. 9, if the driven scroll 40 is tilted by the tilting moment, the second front surface 411 approaches the first opposing surface 351 on one radial side of the driven scroll end plate 41 with respect to the driven axis O2, and the second rear surface 412 approaches the second opposing surface 371 on the other radial side of the driven scroll end plate 41 with respect to the driven axis O2. The tilting of the driven scroll 40 causes the front end portion of the driven scroll body 44 including the front end surface 440 and the second front surface 411 to respectively approach the first rear surface 312 and the rear end portion of the driving scroll body 34 including the rear end surface 340 of the driving scroll body 34.

The extension lengths of the driving scroll body 34 and the driven scroll body 44 are longer than the extension lengths of the driving scroll body 33 and the driven scroll body 43 of the compressor of the embodiment of the present invention in the direction of the driving axis O1, so that the lengths of the fourth gap S4 and the fifth gap S5 are respectively shorter than the lengths of the second gap S2 and the third gap S3 of the compressor of the embodiment of the present invention. In the compressor of the comparative example, the rear end portion of the driving scroll body 34 and the front end portion of the driven scroll body 44 respectively come into contact with the second front surface 411 and the first rear surface 312 before the second front surface 411 comes into contact with the first opposing surface 351 on the one radial side of the driven scroll end plate 41 with respect to the driven axis O2, and the second rear surface 412 comes into contact with the second opposing surface 371 on the other radial side of the driven scroll end plate 41 with respect to the driven axis O2.

Accordingly, in the compressor of the comparative example, the driving scroll body 34 in contact with the driven scroll end plate 41 and the driven scroll body 44 in contact with the driving scroll end plate 31 support the driven scroll 40 to be tilted by the tilting moment, thereby preventing the driven scroll 40 from tilting by the tilting moment. In other words, in the compressor of the comparative example, the driving scroll body 34 and the driven scroll body 44 prevent the driven scroll 40 from tilting, thereby preventing the second front surface 411 and the second rear surface 412 of the driven scroll end plate 41 from coming into contact with the first opposing surface 351 of the driving scroll peripheral wall 35 and the second opposing surface 371 of the cover body 37, respectively. This increases the load on the driving scroll body 34 and the driven scroll body 44 of the compressor of the comparative example, so that the driving scroll body 34 and the driven scroll body 44 become easily damaged.

In contrast, in the compressor of the embodiment of the present invention, the driven scroll end plate 41 is contactable with the driving scroll peripheral wall 35, and when the driven scroll end plate 41 is in contact with the driving scroll peripheral wall 35, the second gap S2 is formed between the front end surface 430 of the driven scroll body 43 and the first rear surface 312 of the driving scroll end plate 31 and the third gap S3 is formed between the rear end surface 330 of the driving scroll body 33 and the second front surface of the driven scroll end plate 41 to prevent the driven scroll body 43 and the driving scroll body 33 from coming into contact with the driving scroll end plate 31 and the driven scroll end plate 41, respectively. Specifically, in the compressor of the embodiment of the present invention, the extension length of the driving scroll peripheral wall 35 extending rearward from the driving scroll end plate 31 is longer than the extension lengths of the driving scroll body 33 and the driven scroll body 43, and the lengths of the second gap S2 and the third gap S3 are longer than the length of the first gap S1.

As illustrated in FIG. 7, in the compressor according to the embodiment of the present invention, when the driven scroll 40 is tilted by the tilting moment with respect to the directions of the driving axis O1 and the driven axis O2, the second front surface 411 comes into contact with the first opposing surface 351 on the one radial side of the driven scroll end plate 41 with respect to the driven axis O2 and the second rear surface 412 comes into contact with the second opposing surface 371 in the space 14 on the other radial side of the driven scroll end plate 41 with respect to the driven axis O2, so that the tilting of the driven scroll 40 due to the tilting moment is regulated. Although the front end portion of the driven scroll body 43 approaches the first rear surface 312 of the driving scroll end plate 31 due to the tilting of the driven scroll 40, the driven scroll body 43 does not come into contact with the first rear surface 312. Similarly, although the rear end portion of the driving scroll body 33 approaches the second front surface 411 of the driven scroll end plate 41 due to the tilting of the driven scroll 40, the driving scroll body 33 does not come into contact with the second front surface 411. The driven scroll 40 does not further tilt after the tilting of the driven scroll 40 due to the tilting moment is regulated, so that the front end portion of the driven scroll body 43 and the rear end portion of the driving scroll body 33 do not further approach the first rear surface 312 and the second front surface 411, respectively.

Thus, the driven scroll body 43 and the driving scroll body 33 of the compressor according to the embodiment of the present invention do not come into contact with the driving scroll end plate 31 and the driven scroll end plate 41, respectively, even if the driven scroll 40 is tilted by the tilting moment with respect to the directions of the driving axis O1 and the driven axis O2, unlike the compressor of the comparative example.

Thus, the compressor according to the embodiment of the present invention allows the driven scroll end plate 41 to come into contact with the driving scroll peripheral wall 35 and the cover body 37 in the space 14, thereby allowing the driving scroll peripheral wall 35, the cover body 37, and the driven scroll end plate 41 to suitably support the tilting moment acting on the driven scroll 40. Furthermore, the compressor according to the embodiment of the present invention does not need to support the driven scroll 40, which is tilted by the tilting moment, by the driving scroll body 33 and the driven scroll body 43, thereby eliminating the large load on the driving scroll body 33 and the driven scroll body 43. Accordingly, the compressor according to the embodiment of the present invention prevents the damage to the driving scroll body 33 and the driven scroll body 43.

The driven scroll end plate 41 has a disc shape, and does not have a shape extending in the direction of the driving axis O1, such as the shapes of the driving scroll body 33 and the driven scroll body 43. Accordingly, the driven scroll end plate 41 has sufficient stiffness in supporting the driven scroll 40, which is tilted by the tilting moment. This configuration of the compressor according to the embodiment of the present invention prevents the damage to the driven scroll end plate 41.

Therefore, the compressor according to the embodiment of the present invention has excellent durability.

In particular, the configuration of the compressor in which the cover body 37 is fixed to the driving scroll peripheral wall 35 by the bolts 71 with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37 facilitates positioning of the driven scroll 40 relative to the driving scroll 30 in the direction of the driving axis O1. The compressor therefore facilitates manufacturing of the compressor.

Furthermore, in this compressor, the presence of the spacer 18 in the through hole 41a allows the gap S11 to be easily formed between the first opposing surface 351 of the driving scroll peripheral wall 35 and the second front surface 411 of the driven scroll end plate 41 and the gap S12 to be easily formed between the second opposing surface 371 of the cover body 37 and the second rear surface 412 of the driven scroll end plate 41. This allows the driven scroll end plate 41 to suitably rotate with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37 without the driven scroll end plate 41 interfering with the driving scroll peripheral wall 35 and the cover body 37.

In the compressor, the driven scroll end plate 41 has a diameter greater than the diameters of the driving scroll peripheral wall 35, the cover body 37, and the rotor 11. This configuration reduces the load, which is generated when the driven scroll end plate 41 comes into contact with the first opposing surface 351 of the driving scroll peripheral wall 35 and the second opposing surface 371 of the cover body 37 in the space 14 and causes the tilting moment that acts on the driven scroll end plate 41. In this regard, the compressor prevents damage to the driven scroll end plate 41.

In the compressor, an increase in the diameter of the driven scroll end plate 41 allows the peripheral portion of the driven scroll end plate 41 to protrude radially outward beyond the driving scroll peripheral wall 35 and the cover body 37 with the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37. This configuration of the compressor easily holds the driven scroll end plate 41 positioned between the driving scroll peripheral wall 35 and the cover body 37 from the outside of the driving scroll peripheral wall 35 and the cover body 37. This facilitates the positioning of the driven scroll 40 relative to the driving scroll 30 in the direction of the driving axis O1 and the fixing of the cover body 37 to the driving scroll peripheral wall 35 by the bolts 71.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the above-described the embodiment, and may be modified as appropriate within the gist of the present invention.

For example, in place of the bolt 71, the cover body 37 may be fixed to the driving scroll peripheral wall 35 by a pin, such as a press-fit pin, which is press-fitted into the driving scroll peripheral wall 35 and the cover body 37.

In the compressor of the embodiment, the spacer 18 is disposed in the through hole 41a. However, the present invention is not limited thereto, and the compressor may include a protruding part or the like that is inserted through the through hole 41a from the first opposing surface 351 of the driving scroll peripheral wall 35 and is in contact with the second opposing surface 371 to secure the gap S11 between the first opposing surface 351 and the second front surface 411 and the gap S12 between the second opposing surface 371 and the second rear surface 412.

In the compressor of the embodiment, the bushing 53 and the driven pin 55 cooperate to form the driven shaft 16. However, the present invention is not limited thereto, and the bushing 53 may be integrally formed with a shaft portion, which is supported by the first support portion 64, so as to form the driven shaft 16 on its own.

The compressor of the embodiment may have a configuration in which the driving scroll 30 is spaced from the rotor 11 in the direction of the driving axis O1 by operatively connecting the driving scroll 30 to the rotor 11 via a driving shaft.

In the compressor of the embodiment, the driven mechanism 20 includes the anti-rotation pins 21 and the rings 22. However, the present invention is not limited thereto, and the driven mechanism 20 may be formed by a pin-ring-pin mechanism in which two pins slide on an inner peripheral surface of one free ring, a pin-and-pin mechanism in which outer peripheral surfaces of two pins slide on each other, a mechanism using Oldham's shaft coupling, or the like.

INDUSTRIAL APPLICABILITY

The present invention is applicable to the air conditioner for the vehicle, or the like.

REFERENCE SIGNS LIST

• • 6 housing
  • 10 electric motor (driving mechanism)
  • 11 rotor
  • 12 compression chamber
  • 18 spacer
  • 30 driving scroll
  • 31 driving scroll end plate
  • 33 driving scroll body
  • 35 driving scroll peripheral wall
  • 37 cover body
  • 40 driven scroll
  • 41 driven scroll end plate
  • 43 driven scroll body
  • O1 driving axis
  • O2 driven axis
  • S2 second gap (gap)
  • S3 third gap (gap)