Construction Machine for Conveying Thick Material

Description

BACKGROUND AND SUMMARY

The invention relates to a construction machine for conveying thick matter.

EP 3 942 181 A1 discloses a construction machine for conveying thick matter, which construction machine has a thick matter pump unit, which is designed to convey the thick matter. The thick matter pump unit of the known construction machine can be driven by means of a drive motor of the construction machine in order to convey the thick matter. The drive motor can be in the form of an electric motor here.

An object of the invention is to provide a construction machine for conveying thick matter, which construction machine firstly can be set down on an underlying surface in a particularly safe and stable manner and secondly can be transported particularly safely.

This object is achieved by the subject matter of the independent claim(s). Preferred embodiments are the subject matter of the dependent claims.

A construction machine according to the invention is used to convey thick matter. The construction machine has an electrical energy store for storing electrical energy and also has an electrical drive device. The electrical drive device is electrically connected to the electrical energy store in order to be supplied with electrical energy. The electrical drive device can be used to convert electrical energy drawn from the electrical energy store at least partly into kinetic energy. The construction machine also has a thick matter pump unit, which is designed to convey the thick matter. The thick matter pump unit can be drive-connected to the electrical drive device. In addition, the construction machine has a main frame. The main frame supports the electrical energy store, the electrical drive device and the thick matter pump unit. Here, the main frame extends longitudinally from a first construction machine end to a second construction machine end along a construction machine longitudinal direction. The main frame additionally extends transversely between a first and a second construction machine side along a construction machine transverse direction. The construction machine longitudinal direction and the construction machine transverse direction are oriented perpendicularly to each other and perpendicularly to a direction of gravity. The main frame has at least three support points which are spaced apart from each other transversely to the direction of gravity. The construction machine is supported relative to an underlying surface at the support points. A support area of the construction machine extends between the support points in a top view of the construction machine. Here, the electrical energy store, the electrical drive device, the thick matter pump unit and the main frame are arranged relative to each other in such a way that an overall center of mass of the construction machine is arranged within the support area in the top view of the construction machine. In addition, the overall center of mass is arranged at a distance from a geometric center of gravity of the support area along the construction machine longitudinal direction.

The abovementioned arrangement results in particularly good stability of the construction machine, that is to say susceptibility of the construction machine to tipping over is particularly low, in the first instance. Secondly, said arrangement advantageously allows particularly safe transportation of the construction machine, in particular as a load of a vehicle trailer or when the construction machine itself is designed as a vehicle trailer. Since the overall center of mass is arranged at a distance from the center of gravity of the support area, the overall mass of the construction machine is distributed between the support points such that at least one of the support points is subject to less loading than the other support points. This provides a particularly good compromise between stability and moveability, in particular maneuverability, of the construction machine.

In the present context, a support point is understood to mean a geometric point at which a portion of the weight force acting on the construction machine is ideally transmitted to the underlying surface. A portion of the weight force can be transmitted at one of the support points directly, that is to say by direct contact between the support point and the underlying surface, or indirectly, that is to say via an appropriately interposed component. Here, the support points can each be arranged within an associated standing surface of the construction machine at which the weight force is transmitted. At least three standing surfaces of this kind can be provided, which are arranged at a distance from each other and at least two of which directly merge with each other.

Thick matter in the present context is understood to mean a slurry-like mixture of different substances. Thick matter is, for example, mortar, cement, screed or concrete, in each case in a mixable and/or conveyable state. The thick matter has not yet hardened in the mixable and/or conveyable state. In particular, the thick matter is a construction material.

In a refinement of the invention, the construction machine has a hydraulic pump, which is driven by means of the electrical drive device and which feeds a hydraulic circuit of the construction machine. Here, the thick matter pump unit is fed from the hydraulic circuit in order to be driven. The thick matter pump unit can therefore be drive-connected to the electrical drive device by means of the hydraulic pump and the hydraulic circuit. The hydraulic pump and the hydraulic circuit are in particular arranged in such a way that the abovementioned positioning of the overall center of mass is established. A particularly high drive power can advantageously be provided by means of the hydraulic pump and the hydraulic circuit for the thick matter pump unit.

In a further refinement of the invention, the overall center of mass is arranged substantially on a construction machine central longitudinal axis, which runs along the construction machine longitudinal direction, in the top view. The construction machine central longitudinal axis runs centrally between the two construction machine sides. This results in a particularly low tendency to tilt with respect to the construction machine central longitudinal axis.

In a further refinement of the invention, the construction machine is in the form of a vehicle trailer. Here, the main frame of the construction machine forms a chassis of the vehicle trailer. As an alternative, the main frame is fastened to a separate chassis of the vehicle trailer. At least one wheel axle with at least two wheels situated opposite each other along the construction machine transverse direction is arranged on the chassis. The chassis additionally has, at the front side of the first construction machine end, a towing device for coupling to a towing vehicle. The towing vehicle is preferably a motor vehicle, in particular a utility vehicle. The vehicle trailer is therefore preferably in the form of a motor vehicle trailer, in particular in the form of a utility vehicle trailer. Here, a respective one of the support points is arranged on the towing device and on each of the wheels. The different loading on the support points as already explained above allows a support load to be formed on the towing device within the legally permissible range. The support point subject to the least loading is preferably formed on the towing device. The vehicle trailer proves to be particularly maneuverable, in particular in a state in which it is decoupled from the towing vehicle, owing to the adopted positioning of the overall center of mass. In this decoupled state, the support point subject to the least loading can shift from the towing device to a support wheel of the vehicle trailer, the support wheel being arranged at a distance from the wheel axle on a drawbar of the vehicle trailer, or any other support device arranged on the drawbar.

In a further refinement of the invention, the towing device and an, in particular virtual, central axis associated with the at least one wheel axle are arranged at a distance from each other along the construction machine longitudinal direction. The central axis runs parallel to the at least one wheel axle. The overall center of mass divides the distance between the towing device and the central axis into a first section closer to the towing device and a second section closer to the central axis in a top view of the construction machine. Here, a ratio of the first section to the second section is 4 to 75, in particular 5.7 to 66. In this way, a proportion of the weight force acting on the construction machine that can be transmitted as a support load to the underlying surface by means of the towing device and by means of a towing vehicle can be defined such that particularly good driving behavior of the combination of towing vehicle and vehicle trailer results. Accordingly, the vehicle trailer formed by the construction machine in the combination proves particularly stable in respect of driving and at the same time maneuverable.

In a further refinement of the invention, the construction machine has a supporting frame. Here, the electrical energy store is arranged on the supporting frame. The supporting frame is in turn attached to the main frame. In particular, the electrical energy store is arranged at least partially, in particular entirely, above the main frame counter to the direction of gravity. The electrical energy store is therefore advantageously particularly easily accessible from one of the construction machine sides, this in particular simplifying fitting of the electrical energy store and/or servicing thereof. However, the electrical energy store can also be partially lowered-that is to say recessed-relative to the supporting frame along the direction of gravity, this advantageously allowing particularly deep arrangement of the overall center of mass with respect to the direction of gravity.

In a further refinement of the invention, the construction machine has an intermediate frame. At least one electrical storage module of the electrical energy store is arranged on the intermediate frame. In particular, the electrical energy store is attached to the supporting frame by means of the intermediate frame. Here, the intermediate frame and the supporting frame are connected to each other fixedly or, for at least partial mutual mechanical decoupling, flexibly. In particular, the intermediate frame and the supporting frame are connected to each other at at least three connecting points. The connecting points can be formed by screw connections and/or elastomeric bearings. A fixed connection may also prove to be particularly durable. In contrast, the flexible connection advantageously allows the electrical storage module to be decoupled from twisting forces and/or driving vibrations acting on the supporting frame.

In a further refinement of the invention, the electrical drive device is arranged centrally or eccentrically between the two construction machine sides along the construction machine transverse direction. The central arrangement of the drive device between the two construction machine sides fosters central positioning of the overall center of mass with respect to the construction machine transverse direction. In contrast, the eccentric arrangement of the electrical drive machine with respect to the construction machine transverse direction allows accessibility to the electrical drive device, for example for fitting and/or servicing purposes.

In a further refinement of the invention, an electrical auxiliary drive device of the construction machine is electrically connected to the electrical energy store for driving auxiliary assemblies of the construction machine. The electrical auxiliary drive of the construction machine can be arranged such that the abovementioned positioning of the overall center of mass is established. A plurality of electrical auxiliary drive devices and auxiliary assemblies can be provided.

In a further refinement of the invention, the electrical drive device and the electrical auxiliary drive device are arranged at substantially the same distance from the first construction machine end along the construction machine longitudinal direction. In addition, the electrical drive device and the electrical auxiliary drive device are arranged opposite each other eccentrically between the two construction machine sides along the construction machine transverse direction, in particular symmetrically with respect to the construction machine central longitudinal axis in a top view of the construction machine. In this way, both the electrical drive device and also the electrical auxiliary drive device are advantageously particularly easily accessible, in particular for fitting and/or servicing purposes. The auxiliary drive device can act as a counterbalance for the electrical drive device.

In a further, in particular alternative refinement of the invention, the electrical drive device and the electrical auxiliary drive device of the construction machine are arranged at a distance from each other along the construction machine longitudinal direction. Available installation space can be particularly well utilized in this way.

In a further refinement of the invention, an electrical converter is arranged on the electrical drive device and/or on the electrical auxiliary drive device. The electrical drive device and/or the electrical auxiliary drive device are electrically connected to the electrical energy store by means of the electrical converter. The converter can advantageously be used to convert an electrical DC voltage which can be tapped off at the electrical energy store into an electrical AC voltage required for operating the electrical drive device and/or the electrical auxiliary drive device.

In a further refinement of the invention, the thick matter pump unit has a water tank for supplying conveying cylinders of the thick matter pump unit with cooling and/or flushing water. Here, the water tank is arranged between the conveying cylinders of the thick matter pump unit and the electrical energy store. The water tank is preferably arranged between the electrical drive device and the electrical energy store along the construction machine longitudinal direction. The water tank can be arranged between working cylinders and the conveying cylinders of the thick matter pump unit. The working cylinders can be fed from the hydraulic circuit of the construction machine. However, the working cylinders can also be in the form of electrical linear drives of the electrical drive device. The electrical linear drive can be provided instead of the working cylinders. The electrical energy store can be arranged above the working cylinders or the linear drives.

In a further refinement of the invention, the water tank is closed by means of a removable cover of the thick matter pump unit. The cover can preferably be removed from the water tank counter to the direction of gravity. Here, the construction machine has a clearance for removing the cover. The clearance is arranged above the water tank counter to the direction of gravity. A servicing opening, which is accessible from above, can advantageously be provided by means of the water tank. Worn parts of the thick matter pump unit can be replaced via this servicing opening for the purpose of servicing the thick matter pump unit.

Further advantages and features of the invention can be found in the claims and in the following description of preferred exemplary embodiments of the invention, which are shown with reference to the drawings. Identical reference signs refer to identical or similar or functionally identical components.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively indicated combination but also in other combinations or on their own, without departing from the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective illustration of one embodiment of a construction machine according to the invention;

FIG. 2 is a further schematic perspective illustration of the construction machine according to FIG. 1;

FIG. 3 is a schematic side view of the construction machine according to FIGS. 1 and 2;

FIG. 4 is a schematic top view of the construction machine according to FIGS. 1 to 3;

FIG. 5 is a schematic perspective illustration of a further embodiment of a construction machine according to the invention;

FIG. 6 is a schematic perspective illustration of the construction machine according to FIG. 5;

FIG. 7 is a schematic side view of the construction machine according to FIGS. 5 and 6;

FIG. 8 is a schematic top view of the construction machine according to FIGS. 5 to 7; and

FIGS. 9 and 10 are schematic perspective illustrations of support of an electrical energy store of the construction machine according to FIG. 1 to 4 or 5 to 8.

DETAILED DESCRIPTION OF THE DRAWINGS

A construction machine 1 is provided for conveying thick matter. The thick matter is, for example, a construction material, which is present in highly viscous form. Thick matter may be a slurry-like mixture of different substances. Thick matter is, in particular, mortar, cement, screed or concrete, in each case in a mixable and/or conveyable state.

The construction machine 1 has an electrical energy store 2 for storing electrical energy. The construction machine 1 additionally comprises an electrical drive device 3. The electrical drive device 3 is electrically connected to the electrical energy store 2 in order to be supplied with electrical energy. Electrical energy from the electrical energy store 2 can be converted into kinetic energy by means of the electrical drive device 3. The construction machine 1 also has a thick matter pump unit 4. The thick matter pump unit 4 can be drive-connected to the electrical drive device 3.

The thick matter pump unit 4 can have conveying cylinders with variable-volume conveying chambers. For, in particular opposite, changes in the volumes of the conveying chambers, the conveying cylinders each have an adjustable conveying piston. The thick matter pump unit 4 can additionally comprise an S-shaped S-pipe, which at one end is fluid-conductively connected to a delivery port as pump outlet. The S-pipe can be arranged in a storage chamber, which can be filled with thick matter from above, for storing thick matter. Here, one end of the S-pipe can be rotatably mounted on the delivery port within the storage chamber. The variable-volume conveying chambers can issue into the storage chamber. In the storage chamber, the S-pipe can be pivotable relative to the conveying chambers in such a way that it can be alternately fluid-conductively connected to one of the conveying chambers. In this way, thick matter located in the storage chamber can be alternately sucked in and pumped to the outside via the conveying chambers, through the S-pipe, by way of the delivery port owing to the interaction of the pivoting of the S-pipe and a change in volume of the conveying chambers. An agitator can be arranged in the storage chamber of the thick matter pump unit 4.

In addition, the construction machine 1 has a main frame 5. Here, the main frame 5 supports both the electrical energy store 2 and also the electrical drive device 3 and the thick matter pump unit 4. The main frame 5 extends longitudinally along a construction machine longitudinal direction L. Here, the main frame 5 extends along the construction machine longitudinal direction L from a first construction machine end 6 to a second construction machine end 7. A construction machine transverse direction Q runs perpendicularly to the construction machine longitudinal direction L. Here, the main frame 5 extends transversely between a first and a second construction machine side 8, 9 along the construction machine transverse direction Q. Both the construction machine longitudinal direction L and the construction machine transverse direction Q are oriented perpendicularly to a direction of gravity G. The construction machine longitudinal direction L, the construction machine transverse direction Q and the direction of gravity G therefore form three axes of a three-dimensional Cartesian coordinate system.

The main frame 5 has at least three support points P1, P2, P3. The support points P1, P2, P3 are spaced apart from each other transversely to the direction of gravity G. Here, a support point is understood to mean a geometric point on the construction machine 1 which is intended to divert at least a portion of the weight force acting on the construction machine 1. For example, a proportion of the weight force can be diverted at a support point of this kind directly into an underlying surface U on which the construction machine 1 is set down. However, it is also possible for a portion of the weight force to not be diverted at a support point of this kind directly into the underlying surface U but rather into a further device or apparatus which is, in turn, set down on the underlying surface U. Each support point P1, P2, P3 can be arranged within a standing surface of a support means of the construction machine 1. A support means of this kind may be a wheel 14, a support 28, a support wheel 16, a towing device 15, a skid or a crawler undercarriage of the construction machine 1.

A support area A of the construction machine 1 extends between the support points P1, P2, P3 in a top view of the construction machine 1. The support area A is thus produced by parallel projection of the support points P1, P2, P3 in the direction of gravity, for example onto the underlying surface U as the projection plane. Here, each of the support points P1, P2, P3 can define a corner of the support area A. However, a plurality of support points P1, P2, P3 can also be arranged on a straight edge of the support area A. In the embodiments shown in the figures, there are precisely three support points P1, P2, P3, so that a triangular support area A is established. However, it is also conceivable for there to be more than three support points P1, P2, P3, so that a support area A with a non-triangular, for example a rectangular or other polygonal, shape can be established.

The electrical energy store 2, the electrical drive device 3, the thick matter pump unit 4 and the main frame 5 largely determine the position of a total center of mass SM of the construction machine 1. Here, the electrical energy store 2, the electrical drive device 3, the thick matter pump unit 4 and the main frame 5 are arranged relative to each other in such a way that the total center of mass SM of the construction machine 1 is arranged within the support area A in the top view of the construction machine 1. The support area A has a geometric center of gravity SA. The total center of mass SM is arranged at a distance from the geometric center of gravity SA in the top view of the construction machine 1. This can be seen, in particular, in FIGS. 4 and 8.

In the embodiment according to FIGS. 1 to 4, the construction machine 1 has a hydraulic pump 10. The hydraulic pump 10 feeds a hydraulic circuit 11 of the construction machine 1. The hydraulic pump 10 is driven by means of the electrical drive device 3. A drive connection between the electrical drive device 3 and the thick matter pump unit 4 is implemented by means of the hydraulic pump 10 and the hydraulic circuit 11. For this purpose, each conveying cylinder of the thick matter pump unit 4 can be respectively, for example mechanically, connected to a hydraulic cylinder of the thick matter pump unit 4, wherein the hydraulic cylinders are fed by the hydraulic circuit 11. Each of the conveying cylinders can as already mentioned above-have, for example, a conveying piston, by means of which a volume of the conveying volume associated with a respective conveying cylinder can be varied. Each conveying piston can be connected to a piston rod, which, remote from the respective conveying piston, is connected to a hydraulic piston of the respectively associated hydraulic cylinder. If hydraulic pressure acts on one of the hydraulic pistons via the hydraulic circuit 11 in order to adjust the hydraulic piston in question, the adjustment of the hydraulic piston in question is also transmitted to the respective conveying piston via the piston rod, this resulting in a change in volume of the associated conveying chamber. The thick material pump unit 4 is therefore fed from the hydraulic circuit 11 in order to be driven. The hydraulic pump 11 is supported by the main frame 5, for example.

In contrast to the embodiment according to FIGS. 1 to 4, in the further embodiment according to FIGS. 5 to 8 of the construction machine 1, there is no hydraulic circuit 11 and no hydraulic pump 10. Rather, the electrical drive device 3 is directly drive-connected to the pump unit 4. For this purpose, each of the conveying cylinders of the thick matter pump unit 4 can be drive-connected by means of an electrical actuating drive of the electrical drive device 3. For example, an electrical linear drive can be provided for each conveying cylinder, the volumes of the conveying chambers of the conveying cylinders being able to be changed by means of the electrical linear drive. For this purpose, conveying pistons of the conveying cylinders can be adjusted by means of the electrical linear drives of the electrical drive device 3. Therefore, the electrical linear drives can be provided instead of the hydraulic cylinders of the embodiment according to FIGS. 1 to 4. Electrical rotary drive devices can be provided instead of rotational hydraulic drives-for example for driving the agitator in rotation and/or for pivoting the S-pipe.

The overall center of mass SM is arranged substantially on a construction machine central longitudinal axis LA in the top view of the construction machine 1—cf. in particular FIGS. 4 and 8. The construction machine central longitudinal axis LA runs along the construction machine longitudinal direction L. In the top view, the electrical energy store 2 can be arranged, for example entirely, in half of the extent of the construction machine 1 along the construction machine longitudinal direction L. Here, this half may be the half of the extent of the construction machine 1 that includes the first construction machine end 6.

In the embodiments shown, the construction machine 1 is in the form of a vehicle trailer 12. Here, the main frame 5 forms a chassis 13 of the vehicle trailer 12. As an alternative, the main frame 5 can be fastened to a separate chassis 13 of the vehicle trailer 12, but this is not shown in the figures. The chassis 13 may be in the form of a chassis frame. At least one wheel axle RA is arranged on the chassis 13. The wheel axle RA has at least two-in the present case precisely two-wheels 14 which are situated opposite each other along the construction machine transverse direction Q. A plurality of wheel axles RA arranged at a distance from each other along the construction machine longitudinal direction L and each having at least two wheels 14, for example so as to form a tandem axle, can be provided.

The chassis 13 has, at the front side of the first construction machine end 16, a towing device 15 for coupling the vehicle trailer 12 to a towing vehicle. The towing vehicle may be a towing machine, for example a motor vehicle. The towing vehicle can be equipped with a coupling device which is designed so as to complement the towing device 5. In a state in which the vehicle trailer 12 is coupled to the towing vehicle, the towing device 15 can rest on the coupling device of the towing vehicle so as to transmit a support load along the direction of gravity G. The towing vehicle itself is supported on the underlying surface U. Therefore, the vehicle trailer 12, at its towing device 15, is supported on the underlying surface U by means of the towing vehicle. The vehicle trailer 12 is additionally supported on the underlying surface U by means of the wheels 14. Accordingly, a respective one of the support points P1, P2, P3 is arranged on the towing device 15 and on each of the wheels 14.

A central axis RM extending along the construction machine transverse direction Q is associated with the at least one wheel axle RA. If—as in the embodiments shown—there is only one single wheel axle RA, the central axis RM corresponds to the wheel axle RA. If there are a plurality of wheel axles RA, the central axis RM runs centrally between the plurality of wheel axles RA. The towing device 15 and the central axis RM are arranged at a distance D from each other along the construction machine longitudinal direction L. In the top view of the construction machine 1, the overall center of mass SM divides the distance D between the towing device 15 and the central axis RM into a first section D1 and a second section D2. Here, the first section D1 is closer to the towing device 15 and the second section D2 is closer to the central axis RM. Therefore, the first section D1 extends from the towing device 15 to the overall center of mass SM, while the second section D2 extends from the central axis RM to the overall center of mass SM. Here, a ratio of the first section D1 to the second section D2 is 4 to 75, in particular 5.7 to 66. In the embodiments shown, the ratio of the first section D1 to the second section D2 is 7.7. In another preferred embodiment, the ratio of the first section D1 to the second section D2 is 65.7. An overall mass of the construction machine 1 is, for example, 3500 kg.

The construction machine 1 has, for example, a supporting frame 17. Here, the electrical energy store 2 is arranged on the supporting frame 17. The supporting frame 17 is attached to the main frame 5. Here, the electrical energy store 2 is arranged at least partially above the main frame 5 counter to the direction of gravity G. In the present case, the electrical energy store 2 is arranged entirely above the main frame 5. However, it is also conceivable for the electrical energy store 2 to alternatively be arranged in overlap with the main frame 5 at least partially along the direction of gravity G as an alternative, so that a recessed arrangement of the electrical energy store 2 relative to the main frame 5 is established.

The construction machine 1 has, for example, an intermediate frame 18. Here, at least one electrical storage module 19 of the electrical energy store 2 is arranged on the intermediate frame 18. The intermediate frame 18 and the supporting frame 17 are connected to each other fixedly or, for at least partial mutual mechanical decoupling, flexibly. The electrical energy store 2 can be attached to the supporting frame 17 by means of the intermediate frame 18. In the present case, the intermediate frame 18 and the supporting frame 17, as can be seen in FIGS. 9 and 10 in particular, are connected to each other at three connecting points 20. However, it goes without saying that more than the three connecting points 20 shown can also be provided for connecting the intermediate frame 18 and the supporting frame 17. Under certain circumstances, fewer than three connecting points 20 may also be provided, that is to say one or two. The electrical storage modules 19 can be supported by means of the intermediate frame 18 and the supporting frame 19, as shown in FIGS. 9 and 10, in both of the embodiments according to FIGS. 1 to 4 and 5 to 8. The at least three connecting points 20 can be implemented by means of screw connections 21. As an alternative or in addition, an elastomeric bearing 22 can be provided for each connecting point 20, in order to achieve flexible connection of the intermediate frame 18 and the supporting frame 17. This allows partial decoupling of the intermediate frame 18 from the supporting frame 17 and from the main frame 5, so that twisting or vibration of the main frame 5 that occurs during operation of the construction machine 1 under certain circumstances is not transmitted or at least is transmitted only to a reduced extent to the electrical energy store 2.

The electrical energy store 2 comprises at least two electrical storage modules 19. In the present case, the electrical energy store 2 comprises precisely two electrical storage modules 19, which are arranged adjacent to each other along the construction machine longitudinal direction L. Each of the electrical storage modules 19 can have at least one battery cell pack. In the present case, each of the electrical storage modules 19 has three electrical battery cell packs of this kind, which are stacked one above the other along the direction of gravity G.

The electrical drive device 3 is arranged, for example, between the two machine sides 8, 9 along the construction machine transverse direction Q. In the present case, the electrical drive device 3 is arranged eccentrically between the two machine sides 8, 9. As an alternative, the electrical drive device 3 can be arranged centrally between the construction machine sides 8, 9. In the present case, the construction machine 1 has an electrical auxiliary drive device 23. The electrical auxiliary drive device 23 serves to drive auxiliary assemblies of the construction machine 1. The electrical auxiliary drive device 23 is electrically connected to the electrical energy store 2. Here, in the present case, the electrical drive device 3 and the electrical auxiliary drive device 23 are arranged at substantially the same distance from the first construction machine end 6 along the construction machine longitudinal direction L. In the present case, the electrical drive device 3 and the electrical auxiliary drive device 23 are arranged opposite each other eccentrically between the two construction machine sides 8, 9 along the construction machine transverse direction Q. In particular, the electrical drive device 3 and the electrical auxiliary drive device 23 are arranged symmetrically with respect to the construction machine central longitudinal axis L in the top view of the construction machine 1.

As an alternative, the electrical drive device 3 and the electrical auxiliary drive device 23 can be arranged at a distance from each other along the construction machine longitudinal direction. The electrical drive device 3 and the electrical auxiliary drive device 23 can be arranged at the same height or offset in relation to each other along the direction of gravity G. A plurality of electrical auxiliary drive devices 23 can be provided. The electrical drive device 3 and the plurality of electrical auxiliary drive devices 23 can be arranged next to each other, one above the other and/or one behind the other along the construction machine longitudinal direction L, along the construction machine transverse direction Q and/or along the direction of gravity G. The electrical drive device 3 and/or at least one of the electrical auxiliary drive devices 23 can be arranged offset in relation to the electrical energy store 2 along the construction machine longitudinal direction L. The electrical drive device and/or the electrical auxiliary drive device 23 can be arranged below the electrical energy store 2 with respect to the direction of gravity G. The electrical energy store 2 can be arranged below the main frame 5.

For example, an electrical converter 24 of the construction machine 1 can be arranged on the electrical drive device 3. As an alternative or in addition, an electrical converter 24 is arranged on the electrical auxiliary drive device 23. In the present case, the electrical drive device 3 and the electrical auxiliary drive device 23 are each electrically connected to the electrical energy store 2 by means of an electrical converter 24. An electrical system of the construction machine 1 is attached, for example, directly to a top side of the electrical energy store 2 at the top counter to the direction of gravity G. The electrical system can have at least one electronic controller for open-loop control and/or closed-loop control of the electrical drive device 3 and/or the electrical auxiliary drive device 23. In addition, the electrical system can comprise an electric starter battery and/or an electronic charger for a charging process of the electrical energy store 3 and/or an electrical converter and/or an electrical distributor.

In the present case, the thick matter pump unit 4 has a water tank 25 for supplying the conveying cylinders of the thick matter pump unit 4 with cooling and/or flushing water. The cooling and/or flushing water can be held in an interior of the water tank 25. Piston rods and a bottom side, which is averted from the conveying chambers of the conveying cylinders, of conveying pistons of the conveying cylinders can be wetted by the cooling and/or flushing water held in the water tank 25. The cooling and/or flushing water serves to lubricate and/or clean the piston rods. The water tank 25 is arranged between the conveying cylinders of the thick matter pump unit 4 and the electrical energy store 2 along the construction machine longitudinal direction L. For example, the water tank 5 is arranged between the electrical drive device 3 and the electrical energy store 2 along the construction machine longitudinal direction L. The water tank 5 can be arranged between the conveying cylinders of the thick matter pump unit 4 and hydraulic or electrical linear drives, each of which is associated with one of the conveying cylinders.

The water tank 25 is closed, for example, by means of a removable cover 26 of the thick matter pump unit 4. Here, the construction machine 1 has a clearance 27. The clearance 27 serves for removing the cover 26 from the water tank 25. The clearance 27 is arranged above the water tank 25 counter to the direction of gravity G. The water tank 25 can form a servicing opening for servicing the thick matter pump unit 4. Worn parts of the thick matter pump unit 4 can be, in particular regularly, replaced via the servicing opening. The water tank 25 has, for example, an outlet device, by means of which the cooling and/or flushing water can be discharged from the interior of the water tank 25 to the outside. The outlet device of the water tank 25 can be actuated from above via the interior of the water tank 25 when the cover 26 is removed, for example.

The construction machine 1 has, for example, a temperature control system. The temperature control system serves to cool and/or heat the electrical energy store 2. The construction machine 1 can have paneling, which is fastened to the supporting frame 5 and shields the components of the construction machine 1 from an external environment of the construction machine 1.