TROLLEY BAG CHASSIS

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present disclosure claims the priority of Chinese Patent Application No. 2024220243170 filed on Aug. 21, 2024 before CNIPA. All the above are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of golf sports equipment, and more specifically relates to a trolley bag chassis.

BACKGROUND

When transporting existing golf bags, it is generally necessary to place them in a trolley bag. The bottom of the trolley bag is typically equipped with a chassis, with wheels installed on its lower portion. By pulling the upper part of the trolley bag to tilt it for movement, the two wheels support the dragging. However, this requires continuous upward force from the user to maintain the tilted state during transportation, resulting in significant manual labor. This remains particularly inconvenient for users with limited strength, as the required physical effort remains substantial.

Therefore, Chinese Patent Application No. 200810126247.2 discloses a fully recessed mobile biased cantilevered support leg luggage device. The pair of support legs is designed to bear the weight of the luggage device during use. When not in use, the support legs are fully recessed into the luggage device, facilitating a safe and reliable transition to an extended operational position. This configuration allows transportation of large and heavy objects within the luggage device. However, operation requires pulling down the entire support leg frame and flipping it over, making the process relatively cumbersome.

SUMMARY

The objective of the present disclosure is to overcome the deficiencies of the prior art and provide a trolley bag chassis. It requires only gripping the gripping rod portion and pulling it downward to retract the positioning portion into the fixed sleeve body. Simultaneously, when the protruding positioning portion retracts into the vertical rear support tube, the support frame can be flipped down. This configuration facilitates convenient retraction and storage during installation, and provides excellent operational effectiveness.

The solution to address the technical problems in the present disclosure is as follows:

• • A trolley bag chassis includes a trolley chassis, in which left and right sides of a lower portion of a rear wall surface of the trolley chassis are pivotally connected with bottom wheels via hinge shafts; a frame mounting groove is formed on the rear wall surface of the trolley chassis; a support frame is sleeved in the frame mounting groove and cooperates with the frame mounting groove; an upper portion of the support frame is pivotally connected to the trolley chassis via a hinge shaft; a support wheel is installed at a bottom of a vertical support tube of the support frame;
  • the frame mounting groove includes left and right vertical grooves extending vertically; wheel placement grooves are formed on the rear wall surface of the trolley chassis at bottom ends of the vertical grooves, the wheel placement grooves communicating with the corresponding vertical grooves; an intermediate mounting groove is formed between the two vertical grooves; an upper groove is formed between upper portions of the two vertical grooves, with both ends of the upper groove, both ends of the intermediate mounting groove, and the two vertical grooves all communicating with one another; and
  • a gripping rod portion is arranged between the two vertical support tubes; two ends of the gripping rod portion are installed with movable blocks; the movable blocks are sleeved in the corresponding vertical support tubes; outer sidewalls of the movable blocks are adjacent to and cooperate with inner sidewalls of the vertical support tubes; the two ends of the gripping rod portion are inserted into vertically elongated through slots formed in middle portions of side plates of the two vertical support tubes facing each other.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural view of the present disclosure;

FIG. 2 is a partial structural schematic view of the present disclosure from a different angle;

FIG. 3 is a partial cross-sectional view of the present disclosure;

FIG. 4 is a partial cross-sectional view of the support frame and the trolley chassis;

FIG. 5 is a partial enlarged view of FIG. 4;

FIG. 6 is a partial structural schematic view of the present disclosure in a rear perspective.

DETAILED DESCRIPTION

The embodiment is as shown in FIGS. 1 to 6. A trolley bag chassis, including a trolley chassis 10, in which left and right sides of a lower portion of a rear wall surface of the trolley chassis 10 are pivotally connected with bottom wheels 11 via hinge shafts, a frame mounting groove 20 is formed on the rear wall surface of the trolley chassis 10; a support frame 30 is sleeved in the frame mounting groove 20 and cooperates with the frame mounting groove 20; an upper portion of the support frame 30 is pivotally connected to the trolley chassis 10 via a hinge shaft; a support wheel 40 is installed at a bottom of a vertical support tube 31 of the support frame 30; and the support wheel 40 is a caster wheel.

The frame mounting groove 20 comprises left and right vertical grooves 21 extending vertically; wheel placement grooves 22 are formed on the rear wall surface of the trolley chassis 10 at bottom ends of the vertical grooves 21, the wheel placement grooves 22 communicating with the corresponding vertical grooves 21; an intermediate mounting groove 23 is formed between the two vertical grooves 21; an upper groove 24 is formed between upper portions of the two vertical grooves 21, with both ends of the upper groove 24, both ends of the intermediate mounting groove 23, and the two vertical grooves 21 all communicating with one another; a main transverse bar is fixed between the two vertical support tubes 31 and the main transverse bar is sleeved in the intermediate mounting groove 23.

A gripping rod portion 3 is arranged between the two vertical support tubes 31; two ends of the gripping rod portion 3 are installed with movable blocks 34; the movable blocks 34 are sleeved in the corresponding vertical support tubes 31; outer sidewalls of the movable blocks 34 are adjacent to and cooperate with inner sidewalls of the vertical support tubes 31; the two ends of the gripping rod portion 3 are inserted into vertically elongated through slots formed in middle portions of side plates of the two vertical support tubes 31 facing each other.

A semicircular groove 211 is formed on a front wall surface of an upper end of the vertical groove 21; an upwardly extending upper protruding positioning recessed hole is formed on an upper inner wall surface of the semicircular groove 211; a forwardly extending front protruding positioning recessed hole is formed on a front end wall surface of the semicircular groove 211; the semicircular groove 211 enables the two vertical support tubes 31 of the support frame 30 to rotate along the semicircular groove 211 at their tops during flipping.

The support frame 30 includes two vertical support tubes 31 (having a rectangular cross-section) with vertical through holes formed in their middle portions; the vertical support tubes 31 are sleeved in the corresponding vertical grooves 21; a fixed sleeve body 32 is sleeved over upper ends of the vertical support tubes 31; an inner sidewall of the fixed sleeve body 32 closely adheres to an outer sidewall of an upper portion of the vertical support tube 31; hinge shafts are sleeved in corresponding through holes of left and right side plates of a middle portion of the fixed sleeve body 32 and left and right side plates of the upper portion of the vertical support tube 31; both ends of the hinge shafts extend outward from left and right outer sidewalls of the fixed sleeve body 32 and are pivotally connected to left and right side walls of the corresponding vertical groove 21.

A limiting column 33 is sleeved in the upper portion of the vertical support tube 31; a positioning portion fixed or formed at an upper end of the limiting column 33 extends beyond upper ends of the vertical support tube 31 and the fixed sleeve body 32 and is sleeved in the upper protruding positioning recessed hole; a lower outer sidewall of the positioning portion closely adheres to a top inner sidewall of the corresponding vertical support tube 31; a movable block 34 is sleeved in the vertical support tube 31 below the limiting column 33; an upper vertical rod 341 is fixed to a top surface of the movable block 34; and a top end of the upper vertical rod 341 is fixed to a bottom end of the limiting column 33.

A vertical connecting rod 36 is fixed to a bottom of the movable block 34, a lower lifting head 37 is fixed to a bottom end of the vertical connecting rod 36, a vertical guide plate 38 is fixed to a bottom end of the lower lifting head 37, and a bottom surface of the vertical guide plate 38 is an inclined wall surface; an adjustment limiting column 50 is fixed to an inner sidewall of the vertical support tube 31 below the lower lifting head 37, an insertion slot extending downward is formed in a central portion of a top surface of the adjustment limiting column 50, a lower positioning block is fixed to a bottom surface of the adjustment limiting column 50, the lower positioning block is sleeved in the vertical support tube 31, a lateral insertion hole 51 extending inward horizontally is formed on an outer sidewall of the lower positioning block, a lower insertion slot is formed in a central portion of a top surface of the lower positioning block, the lower insertion slot communicates with and corresponds to the insertion slot, and a lateral positioning block 52 is sleeved in the lateral insertion hole 51; a guide insertion hole 53 is formed on a top surface of the lateral positioning block 52, an inner sidewall surface of the guide insertion hole 53 is an inclined wall surface extending inward and downward, the vertical guide plate 38 is sleeved in the insertion slot and the lower insertion slot, a lower portion of the vertical guide plate 38 is adjacent to or closely adhered to front and rear inner sidewalls of the lower insertion slot, a bottom portion of the vertical guide plate 38 is sleeved in the guide insertion hole 53, and the bottom surface of the vertical guide plate 38 is an inclined wall surface tightly adhered to and cooperating with the inclined wall surface of the guide insertion hole 53; a lateral spring 1 is sleeved in the lateral insertion hole 51, an end of the lateral spring 1 abuts against an inner end surface of the lateral insertion hole 51, an opposite end of the lateral spring 1 is sleeved in an insertion hole at an inner end of the lateral positioning block 52 and abuts against an inner end surface of the insertion hole, a lateral positioning portion 521 is formed on a central portion of an outer end surface of the lateral positioning block 52, the lateral positioning portion 521 is sleeved in a through hole of a wall plate on an outer side of the vertical support tube 31, and an outer end of the lateral positioning portion 521 is sleeved in a positioning recessed hole formed on a side wall of the corresponding vertical groove 21.

A protruding positioning portion 381 is formed on a left or right sidewall of a middle portion of the vertical guide plate 38, and an elastic bent limiting portion 55 is formed on a left or right sidewall of an upper portion of the insertion slot of the adjustment limiting column 50, with a bottom end of the elastic bent limiting portion 55 abutting against a top end of the corresponding protruding positioning portion 381.

Downwardly extending blocking portions 241 are formed on rear portions of top surfaces at both ends of the upper groove 24, and the blocking portions 241 are located behind left or right portions of the gripping rod portion 3 to block the left or right portions of the gripping rod portion 3.

A middle portion of the gripping rod portion 3 is a horizontally extending gripping portion, upwardly inclined extending connection portions are formed at both ends of the horizontally extending gripping portion, and connection portions formed at ends of the inclined extending connection portions are sleeved in the corresponding elongated through slots and fixed to the corresponding movable blocks 34.

A guide protruding portion is formed on a middle portion of a front or rear sidewall of the insertion slot, the guide protruding portion is sleeved in a vertical main guide through slot formed in a middle portion of the vertical guide plate 38, and left and right sidewalls of the guide protruding portion closely adhere to corresponding left and right sidewalls of the vertical main guide through slot. The guide protruding portion guides the vertical movement of the vertical guide plate 38, preventing misalignment of the vertical guide plate 38.

In this embodiment during use, there are two operational states: one state is a retracted state of support frame 30, in which the support frame 30 is retracted into the frame mounting groove 20. The positioning portion at the upper end of the limiting column 33 extends beyond the upper ends of the vertical support tube 31 and the fixed sleeve body 32 and is sleeved in the upper protruding positioning groove. Simultaneously, the outer end of the lateral positioning portion 521 is sleeved in the positioning groove formed on the sidewall of the corresponding vertical groove 21, thereby securing the support frame 30 to the trolley chassis 10. The blocking portion 241 is positioned behind the left or right portion of the gripping rod portion 3 and blocks the left or right portion of the gripping rod portion 3. In this state, regardless of how the support frame 30 is pulled outward, it cannot flip out of the frame mounting groove 20, ensuring firm fixation, minimizing external space occupation, and delivering excellent operational effectiveness.

The other state is an operational state. The user grips the gripping rod portion 3 and pulls it downward, causing the positioning portion at the upper end of the limiting column 33 to retract and withdraw from the upper protruding positioning groove. Simultaneously, the movable block 34 descends, driving the vertical guide plate 38 downward. The inclined bottom surface of the vertical guide plate 38 slides along the inclined wall surface of the guide insertion hole 53, forcing the lateral positioning block 52 to move laterally inward and compressing the lateral spring 1. As a result, the outer end of the lateral positioning portion 521 disengages from the positioning groove 211 formed on the sidewall of the corresponding vertical groove 21. By pulling the gripping rod portion 3 backward, the support frame 30 is flipped outward. During flipping, the fixed sleeve body 32 and the top of the vertical support tube 31 rotate along the semicircular groove 211. When the upper end of the limiting column 33 aligns with the front protruding positioning groove, the lateral spring 1 restores, resetting all components. The upper end of the limiting column 33 extends beyond the upper ends of the vertical support tube 31 and the fixed sleeve body 32 and is sleeved in the corresponding front protruding positioning groove, achieving locking. In this state, the support frame 30 is nearly perpendicular to the rear wall surface of the trolley chassis 10. The trolley chassis 10 can be tilted downward, with the support wheels 40 and bottom wheels 11 pressed against the ground. The user can then manually pull the trolley chassis 10 for horizontal movement. Golf bags or travel cases can be placed on the chassis for transportation, significantly reducing manual labor and delivering excellent operational effectiveness.

In some implementations, a semicircular groove is formed on a front wall surface of an upper end of the vertical groove; an upwardly extending upper protruding positioning recessed hole is formed on an upper inner wall surface of the semicircular groove; a forwardly extending front protruding positioning recessed hole is formed on a front end wall surface of the semicircular groove;

• • the support frame includes two vertical support tubes with vertical through holes formed in their middle portions; the vertical support tubes are sleeved in the corresponding vertical grooves; a fixed sleeve body is sleeved over upper ends of the vertical support tubes; an inner sidewall of the fixed sleeve body closely adheres to an outer sidewall of an upper portion of the vertical support tube; hinge shafts are sleeved in corresponding through holes of left and right side plates of a middle portion of the fixed sleeve body and left and right side plates of the upper portion of the vertical support tube; both ends of the hinge shafts extend outward from left and right outer sidewalls of the fixed sleeve body and are pivotally connected to left and right side walls of the corresponding vertical groove; and
  • a limiting column is sleeved in the upper portion of the vertical support tube; a positioning portion fixed or formed at an upper end of the limiting column extends beyond upper ends of the vertical support tube and the fixed sleeve body and is sleeved in the upper protruding positioning recessed hole; a lower outer sidewall of the positioning portion closely adheres to a top inner sidewall of the corresponding vertical support tube; a movable block is sleeved in the vertical support tube below the limiting column; an upper vertical rod is fixed to a top surface of the movable block; and a top end of the upper vertical rod is fixed to a bottom end of the limiting column.

In some implementations, a vertical connecting rod is fixed to a bottom of the movable block, a lower lifting head is fixed to a bottom end of the vertical connecting rod, a vertical guide plate is fixed to a bottom end of the lower lifting head, and a bottom surface of the vertical guide plate is an inclined wall surface; an adjustment limiting column is fixed to an inner sidewall of the vertical support tube below the lower lifting head, an insertion slot extending downward is formed in a central portion of a top surface of the adjustment limiting column, a lower positioning block is fixed to a bottom surface of the adjustment limiting column, the lower positioning block is sleeved in the vertical support tube, a lateral insertion hole extending inward horizontally is formed on an outer sidewall of the lower positioning block, a lower insertion slot is formed in a central portion of a top surface of the lower positioning block, the lower insertion slot communicates with and corresponds to the insertion slot, and a lateral positioning block is sleeved in the lateral insertion hole; a guide insertion hole is formed on a top surface of the lateral positioning block, an inner sidewall surface of the guide insertion hole is an inclined wall surface extending inward and downward, the vertical guide plate is sleeved in the insertion slot and the lower insertion slot, a lower portion of the vertical guide plate is adjacent to or closely adhered to front and rear inner sidewalls of the lower insertion slot, a bottom portion of the vertical guide plate is sleeved in the guide insertion hole, and the bottom surface of the vertical guide plate is an inclined wall surface tightly adhered to and cooperating with the inclined wall surface of the guide insertion hole; a lateral spring is sleeved in the lateral insertion hole, an end of the lateral spring abuts against an inner end surface of the lateral insertion hole, an opposite end of the lateral spring is sleeved in an insertion hole at an inner end of the lateral positioning block and abuts against an inner end surface of the insertion hole, a protruding positioning portion is formed on a central portion of an outer end surface of the lateral positioning block, the protruding positioning portion is sleeved in a through hole of a wall plate on an outer side of the vertical support tube, and an outer end of the protruding positioning portion is sleeved in a positioning recessed hole formed on a side wall of the corresponding vertical groove.

In some implementations, a protruding positioning portion is formed on a left or right sidewall of a middle portion of the vertical guide plate, and an elastic bent limiting portion is formed on a left or right sidewall of an upper portion of the insertion slot of the adjustment limiting column, with a bottom end of the elastic bent limiting portion abutting against a top end of the corresponding protruding positioning portion.

In some implementations, downwardly extending blocking portions are formed on rear portions of top surfaces at both ends of the upper groove, and the blocking portions are located behind left or right portions of the gripping rod portion to block the left or right portions of the gripping rod portion.

In some implementations, a middle portion of the gripping rod portion is a horizontally extending gripping portion, upwardly inclined extending connection portions are formed at both ends of the horizontally extending gripping portion, and connection portions formed at ends of the inclined extending connection portions are sleeved in the corresponding elongated through slots and fixed to the corresponding movable blocks.

In some implementations, a guide protruding portion is formed on a middle portion of a front or rear sidewall of the insertion slot, the guide protruding portion is sleeved in a vertical main guide through slot formed in a middle portion of the vertical guide plate, and left and right sidewalls of the guide protruding portion closely adhere to corresponding left and right sidewalls of the vertical main guide through slot.

The outstanding effects of the present disclosure are:

The trollely bag chassis according to the present disclosure includes a flip-down support frame with support wheels installed at the bottom. After flipping out the support frame, the chassis is supported for movement by four wheels (two support wheels and two bottom wheels), eliminating the need for upward pulling force. Only horizontal pulling force is required to achieve horizontal movement of the trolley bag chassis, thereby reducing manual effort while maintaining excellent operational effectiveness.

By simply gripping the gripping rod portion and pulling it downward, the positioning portion retracts into the fixed sleeve body. Simultaneously, when the protruding positioning portion retracts into the vertical rear support tube, the support frame flips down. This configuration ensures convenient operation and high efficacy.

After flipping out, the positioning portion extends through lateral spring reset to protrude from the top end of the fixed sleeve body and engages with the front protruding positioning recessed hole, achieving secure fixation for ease of use.

When not in use, pulling the gripping rod portion downward retracts the positioning portion into the fixed sleeve body and withdraws the protruding positioning portion into the vertical rear support tube. The support frame then flips back into the frame mounting groove, minimizing external space occupation. After entering the frame mounting groove, the elastic restoring force of the lateral spring extends the positioning portion from the top end of the fixed sleeve body into the upper protruding positioning recessed hole, locking the support frame. Concurrently, the protruding positioning portion engages with the corresponding positioning recessed hole, preventing accidental dislodgement from the frame mounting groove. This design ensures reliable locking and enhances operational safety.