Construction machine for conveying thick material

Abstract

The invention relates to a construction machine for conveying thick material, having: an electrical energy storage device, an electrical drive device that is electrically connected to the electrical energy storage device, a thick material pump unit and a base frame that has at least three support points spaced apart from one another transversely to a direction of gravity and at which the construction machine is supported relative to a base, wherein in a plan view of the construction machine, a support surface of the construction machine extends between the support points, wherein the electrical energy storage device, the electrical drive device, the thick material pump unit and the base frame are arranged relative to one another in such a way that an overall centre of gravity of the construction machine is arranged within the support surface in the plan view of the construction machine and along a longitudinal direction of the construction machine at a distance from a geometric centre of gravity of the support surface.

Description

[0001] Construction machine for conveying thick material

[0002] The invention relates to a construction machine for conveying thick material.

[0003] EP 3 942 181 A1 discloses a construction machine for conveying high-density solids, which comprises a high-density solids pump unit designed to convey the high-density solids. The high-density solids pump unit of the known construction machine is driven by a drive motor of the construction machine to convey the high-density solids. The drive motor can be designed as an electric motor.

[0004] It is an object of the invention to create a construction machine for conveying thick material which, on the one hand, can be placed particularly safely and stably on a surface and, on the other hand, can be transported particularly safely.

[0005] This object is solved by the subject matter of patent claim 1. Preferred embodiments are the subject matter of the dependent patent claims.

[0006] A construction machine according to the invention is used to convey thick materials. The construction machine has an electrical energy storage device for storing electrical energy and an electrical drive device. The electrical drive device is electrically connected to the electrical energy storage device to supply it with electrical energy. By means of the electrical drive device, electrical energy drawn from the electrical energy storage device can be at least partially converted into kinetic energy. The construction machine also has a thick materials pump unit designed to convey the thick materials. The thick materials pump unit can be drive-connected to the electrical drive device. In addition, the construction machine has a base frame. The base frame supports the electrical energy storage device, the electrical drive device, and the thick materials pump unit.The base frame extends longitudinally along a construction machine longitudinal direction from a first construction machine end to a second construction machine end. The base frame also extends transversely along a construction machine transverse direction between a first and a second construction machine side. The construction machine longitudinal direction and the construction machine transverse direction are aligned perpendicular to one another and perpendicular to a direction of gravity. The base frame has at least three support points spaced apart from one another transversely to the direction of gravity. The construction machine is supported against a subsurface at the support points. In a plan view of the construction machine, a support surface of the construction machine extends between the support points.The electrical energy storage unit, the electric drive system, the high-density solids pump unit, and the base frame are arranged relative to one another in such a way that the overall center of mass of the construction machine is located within the support surface when viewed from above. Furthermore, the overall center of mass is positioned along the longitudinal direction of the construction machine at a distance from a geometric center of gravity of the support surface.

[0007] As a result of the above arrangement, on the one hand, the construction machine is particularly stable, i.e. its susceptibility to tipping over is particularly low. On the other hand, the above arrangement advantageously enables particularly safe transport of the construction machine, in particular as a load on a vehicle trailer or when the construction machine is designed as a vehicle trailer itself. Because the total center of mass is arranged at a distance from the center of gravity of the support surface, the total mass of the construction machine can be distributed across the support points in such a way that at least one of the support points is subjected to less load than the other support points. This results in a particularly good compromise between stability and mobility, in particular maneuverability, of the construction machine.

[0008] In this context, a support point is understood to be a geometric point at which a portion of the weight force acting on the construction machine is ideally transferred to the ground. The transfer of a portion of the weight force at one of the support points can occur directly, i.e. through direct contact of the support point with the ground, or indirectly, i.e. via a component inserted as intended. The support points can each be arranged within an associated contact surface of the construction machine, at which the weight force is transferred. There can be at least three such contact surfaces, which are arranged at a distance from one another or at least two of which merge directly into one another.

[0009] In this context, thick aggregate refers to a paste-like mixture of different materials. Examples of thick aggregate include mortar, cement, screed, or concrete, each in a mixable and / or conveyable state. In this mixable and / or conveyable state, the thick aggregate has not yet hardened. Specifically, thick aggregate is a building material.

[0010] In an embodiment of the invention, the construction machine has a hydraulic pump that is driven by the electric drive device and feeds a hydraulic circuit of the construction machine. The high-viscosity pump unit is driven by the hydraulic circuit. The high-viscosity pump unit can thus be connected to the electric drive device via the hydraulic pump and the hydraulic circuit. The hydraulic pump and the hydraulic circuit are arranged in particular such that the aforementioned positioning of the overall center of mass is achieved. Advantageously, a particularly high drive power can be provided for the high-viscosity pump unit via the hydraulic pump and the hydraulic circuit.

[0011] In a further embodiment of the invention, the overall center of mass, viewed from above, is located essentially on a central longitudinal axis of the construction machine, which runs along the longitudinal direction of the construction machine. The central longitudinal axis of the construction machine runs centrally between the two sides of the construction machine. This results in a particularly low tendency to tip relative to the central longitudinal axis of the construction machine.

[0012] In a further embodiment of the invention, the construction machine is designed as a vehicle trailer. The base frame of the construction machine forms a chassis of the vehicle trailer. Alternatively, the base frame is attached to a separate chassis of the vehicle trailer. At least one wheel axle with at least two wheels located opposite one another along the transverse direction of the construction machine is arranged on the chassis. The chassis also has a towing device at the front of the first end of the construction machine for coupling to a towing vehicle. The towing vehicle is preferably a motor vehicle, in particular a commercial vehicle. The vehicle trailer is therefore preferably designed as a motor vehicle trailer, in particular as a commercial vehicle trailer. One of the support points is arranged on the towing device and on each of the wheels.The varying loads on the support points, as explained above, allow for the development of a support load on the towing device within the legally permissible limits. Preferably, the support point with the least load is located on the towing device. The selected positioning of the overall center of gravity makes the trailer particularly maneuverable, particularly when uncoupled from the towing vehicle. In this uncoupled state, the support point with the least load can be shifted from the towing device to a support wheel of the trailer located at a distance from the wheel axle on a drawbar of the trailer, or to another support device located on the drawbar.

[0013] In a further embodiment of the invention, the towing device and a central axis, in particular a virtual one, assigned to the at least one wheel axle are arranged at a distance from one another along the longitudinal direction of the construction machine. The central axis runs parallel to the at least one wheel axle. In a plan view of the construction machine, the overall center of gravity divides the distance between the towing device and the central axis into a first section facing the towing device and a second section facing the central axis. The 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 transferred to the ground as a support load by means of the towing device and by means of a towing vehicle can be determined in such a way that particularly good handling of the combination consisting of towing vehicle and vehicle trailer results.Accordingly, the vehicle trailer formed by the construction machine proves to be particularly stable and at the same time maneuverable.

[0014] In a further embodiment of the invention, the construction machine has a support frame. The electrical energy storage device is arranged on the support frame. The support frame is in turn attached to the base frame. In particular, the electrical energy storage device is arranged at least partially, in particular completely, above the base frame, counter to the direction of gravity. Advantageously, the electrical energy storage device is thus particularly easily accessible from one of the sides of the construction machine, which in particular simplifies the installation of the electrical energy storage device and / or its maintenance. However, the electrical energy storage device can also be partially lowered - i.e. countersunk - relative to the support frame along the direction of gravity, which advantageously enables a particularly low arrangement of the overall center of mass with respect to the direction of gravity.

[0015] In a further embodiment of the invention, the construction machine has an intermediate frame. At least one electrical storage module of the electrical energy storage device is arranged on the intermediate frame. In particular, the electrical energy storage device is attached to the support frame by means of the intermediate frame. The intermediate frame and the support frame are connected to one another firmly or flexibly for at least partial mutual mechanical decoupling. In particular, the intermediate frame and the support frame are connected to one another at at least three connection points. The connection points can be formed by screw connections and / or elastomer bearings. A fixed connection can prove to be particularly resistant to aging. In contrast, the flexible connection advantageously allows the electrical storage module to be decoupled from torsional forces and / or driving vibrations acting on the support frame.

[0016] In a further embodiment of the invention, the electric drive device is arranged centrally or off-center along the transverse direction of the construction machine between the two sides of the construction machine. The central arrangement of the drive device between the two sides of the construction machine promotes a central positioning of the overall center of gravity with respect to the transverse direction of the construction machine. In contrast, the off-center arrangement of the electric drive device with respect to the transverse direction of the construction machine offers accessibility to the electric drive device, for example, for assembly and / or maintenance purposes.

[0017] In a further embodiment of the invention, an electric auxiliary drive device of the construction machine for driving auxiliary units of the construction machine is electrically connected to the electrical energy storage device. The electric auxiliary drive device of the construction machine can be arranged such that the aforementioned positioning of the overall center of mass is achieved. Multiple electric auxiliary drive devices and auxiliary units can be present.

[0018] In a further embodiment of the invention, the electric drive device and the electric auxiliary drive device are arranged along the longitudinal direction of the construction machine at substantially the same distance from the first end of the construction machine. Furthermore, the electric drive device and the electric auxiliary drive device are arranged opposite one another along the transverse direction of the construction machine, eccentrically between the two sides of the construction machine, in particular symmetrically to the central longitudinal axis of the construction machine in a plan view of the construction machine. Advantageously, this provides particularly good accessibility to both the electric drive device and the electric auxiliary drive device, in particular for assembly and / or maintenance purposes. The auxiliary drive device can function as a counterweight for the electric drive device.

[0019] In a further, particularly alternative, embodiment of the invention, the electric drive device and the electric auxiliary drive device of the construction machine are arranged at a distance from one another along the longitudinal direction of the construction machine. This allows for particularly effective utilization of the available installation space.

[0020] In a further embodiment of the invention, an electrical converter is arranged on the electric drive device and / or on the electric auxiliary drive device. The electrical converter electrically connects the electric drive device and / or the electric auxiliary drive device to the electrical energy storage device. The converter advantageously converts a direct current voltage tapped from the electrical energy storage device into an alternating current voltage required for the operation of the electric drive device and / or the electric auxiliary drive device.

[0021] In a further embodiment of the invention, the slurry pump unit has a water tank for supplying the delivery cylinders of the slurry pump unit with cooling and / or flushing water. The water tank is arranged along the longitudinal direction of the construction machine between the delivery cylinders of the slurry pump unit and the electrical energy storage device. The water tank is preferably arranged along the longitudinal direction of the construction machine between the electrical drive device and the electrical energy storage device. The water tank can be arranged between the working cylinders and the delivery cylinders of the slurry pump unit. The working cylinders can be fed from the hydraulic circuit of the construction machine. However, the working cylinders can also be designed as electric linear drives of the electric drive device. The electric linear drives can be provided instead of the working cylinders.The electrical energy storage unit can be arranged above the working cylinders or the linear drives.

[0022] In a further embodiment of the invention, the water tank is closed by a removable cover of the high-viscosity pump unit. The cover is preferably removable from the water tank against the direction of gravity. The construction machine has a clearance for removing the cover. The clearance is arranged above the water tank, against the direction of gravity. Advantageously, a maintenance opening accessible from above can be provided via the water tank. Wear parts of the high-viscosity pump unit can be replaced through this maintenance opening for servicing the high-viscosity pump unit.

[0023] Further advantages and features of the invention will become apparent from the claims and the following description of preferred embodiments of the invention, which are illustrated with reference to the drawings. Like reference numerals refer to like, similar, or functionally identical components.

[0024] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

[0025] Fig. 1 shows a schematic perspective view of an embodiment of a construction machine according to the invention, Fig. 2 shows the construction machine according to Fig. 1 in a further schematic perspective view,

[0026] Fig. 3 shows a schematic side view of the construction machine according to Figs. 1 and 2,

[0027] Fig. 4 shows a schematic plan view of the construction machine according to Figs. 1 to 3,

[0028] Fig. 5 shows a further embodiment of a construction machine according to the invention in a schematic perspective view,

[0029] Fig. 6 the construction machine according to Fig. 5 in a schematic perspective view,

[0030] Fig. 7 the construction machine according to Figs. 5 and 6 in a schematic side view,

[0031] Fig. 8 the construction machine according to Figs. 5 to 7 in a schematic plan view,

[0032] Fig. 9 and 10 show schematic perspective views of a bearing of an electrical

[0033] Energy storage of the construction machine according to Fig. 1 to 4 or 5 to 8.

[0034] A construction machine 1 is designed for conveying high-density material. The high-density material is, for example, a building material that is in a thick, highly viscous form. High-density material can be a paste-like mixture of different materials. High-density material is, in particular, mortar, cement, screed, or concrete, each in a mixable and / or conveyable state.

[0035] The construction machine 1 has an electrical energy storage device 2 for storing electrical energy. The construction machine 1 also includes an electrical drive device 3. The electrical drive device 3 is electrically connected to the electrical energy storage device 2 to supply it with electrical energy. By means of the electrical drive device 3, electrical energy from the electrical energy storage device 2 can be converted into kinetic energy. The construction machine 1 also has a thick matter pump unit 4. The thick matter pump unit 4 is designed to convey the thick matter. The thick matter pump unit 4 can be drive-connected to the electrical drive device 3.

[0036] The thick matter pump unit 4 can have delivery cylinders with variable-volume delivery chambers. For changing the volumes of the delivery chambers, in particular in opposite directions, the delivery cylinders can each have an adjustable delivery piston. The thick matter pump unit 4 can also comprise an S-shaped S-pipe, one end of which is fluidly connected to a pressure port acting as a pump outlet. The S-pipe can be arranged in a storage chamber that can be filled with thick matter from above for storing thick matter. The S-pipe can be rotatably mounted at one end on the pressure port within the storage chamber. The variable-volume delivery chambers can open into the storage chamber. The S-pipe can be pivotable in the storage chamber relative to the delivery chambers such that it can be fluidly connected alternately to one of the delivery chambers.In this way, due to the counteraction of the pivoting of the S-pipe and a change in the volume of the pumping chambers, the thick matter in the storage chamber can be alternately sucked in by the pumping chambers and pumped out through the pumping chambers, through the S-pipe, and via the discharge nozzle. An agitator can be arranged in the storage chamber of the thick matter pump unit 4.

[0037] The construction machine 1 also has a base frame 5. The base frame 5 supports the electrical energy storage unit 2 as well as the electrical drive device 3 and the thick matter pump unit 4. The base frame 5 extends longitudinally along a construction machine longitudinal direction L. The base 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 perpendicular to the construction machine longitudinal direction L. The base frame 5 extends transversely along the construction machine transverse direction Q between a first and a second construction machine side 8, 9. Both the construction machine longitudinal direction L and the construction machine transverse direction Q are aligned perpendicular to a direction of gravity G. The construction machine longitudinal direction L, the construction machine transverse direction Q and the direction of gravity G thus form three axes of a three-dimensional Cartesian coordinate system.

[0038] The base frame 5 has at least three support points P1, P2, P3. The support points P1, P2, P3 are arranged at a distance from one another transversely to the direction of gravity G. A support point is understood to be a geometric point on the construction machine 1 which is intended to divert at least part of the weight force acting on the construction machine 1. For example, the weight force can be diverted proportionately at such a support point directly into a subsurface U on which the construction machine 1 is parked. However, it is also possible for part of the weight force at such a support point not to be diverted directly into the subsurface U, but into another device or apparatus which in turn is parked on the subsurface U. Each support point P1, P2, P3 can be arranged within a contact area of ​​a support means of the construction machine 1.Such a support means can be a wheel 14, a support 28, a support wheel 16, a traction device 15, skids or a chain or crawler track of the construction machine 1.

[0039] In a plan view of the construction machine 1, a support surface A of the construction machine 1 extends between the support points P1, P2, P3. The support surface A is therefore obtained by parallel projection of the support points P1, P2, P3 in the direction of gravity, for example onto the ground U as the projection plane. Each of the support points P1, P2, P3 can define a corner of the support surface A. However, several support points P1, P2, P3 can also be arranged on a straight edge of the support surface A. In the embodiments shown in the figures, there are exactly three support points P1, P2, P3, so that a triangular support surface A is produced. However, it is also conceivable that more than three support points P1, P2, P3 are present, so that a support surface A with a non-triangular shape, for example a quadrilateral or other polygonal shape, can result.

[0040] The electrical energy storage device 2, the electrical drive device 3, the thick matter pump unit 4 and the base frame 5 significantly determine the position of an overall center of mass SM of the construction machine 1. The electrical energy storage device 2, the electrical drive device 3, the thick matter pump unit 4 and the base frame 5 are arranged relative to one another in such a way that the overall center of mass SM of the construction machine 1 is arranged within the support surface A in the plan view of the construction machine 1. The support surface A has a geometric center of mass SA. In the plan view of the construction machine 1, the overall center of mass SM is arranged at a distance from the geometric center of mass SA. This can be seen in particular in Figs. 4 and 8.

[0041] 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 the electric drive device 3. A drive connection between the electric drive device 3 and the thick matter pump unit 4 is realized by means of the hydraulic pump 10 and the hydraulic circuit 11. For this purpose, each delivery cylinder of the thick matter pump unit 4 can be connected, for example mechanically, 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 delivery cylinders can - as already mentioned above - have, for example, a delivery piston, by means of which a volume of the delivery volume associated with a respective delivery cylinder can be varied.Each delivery piston can be connected to a piston rod, which is connected to a hydraulic piston of the associated hydraulic cylinder, facing away from the respective delivery piston. If one of the hydraulic pistons is subjected to hydraulic pressure via the hydraulic circuit 11 in order to adjust the corresponding hydraulic piston, the adjustment of the corresponding hydraulic piston is also transmitted via the piston rod to the respective delivery piston, resulting in a change in the volume of the associated delivery chamber. The high-viscosity pump unit 4 is thus powered by the hydraulic circuit 11. The hydraulic pump 11 is supported, for example, by the base frame 5.

[0042] 1 to 4, the further embodiment according to FIGS. 5 to 8 of the construction machine 1 does not have a hydraulic circuit 11 or a hydraulic pump 10. Instead, the electric drive device 3 is directly drive-connected to the pump unit 4. For this purpose, each of the delivery cylinders of the thick matter pump unit 4 can be drive-connected by means of an electric actuator of the electric drive device 3. For example, an electric linear drive can be provided for each delivery cylinder, by means of which the volumes of the delivery chambers of the delivery cylinders can be changed. For this purpose, delivery pistons of the delivery cylinders can be adjusted by means of the electric linear drives of the electric drive device 3. Thus, instead of the hydraulic cylinders of the embodiment according to FIGS. 1 to 4, the electric linear drives can be provided.Instead of rotary hydraulic drives - for example for rotating the agitator and / or for pivoting the S-pipe - electric rotary drive devices can be provided.

[0043] In the plan view of the construction machine 1—see in particular Figs. 4 and 8—the total center of mass SM is arranged essentially on a construction machine central longitudinal axis LA. The construction machine central longitudinal axis LA runs along the construction machine's longitudinal direction L. In the plan view, the electrical energy storage device 2 can be arranged, for example entirely, in one half of the extension of the construction machine 1 along the construction machine's longitudinal direction L. This can be the half of the extension of the construction machine 1 that includes the first construction machine end 6.

[0044] In the embodiments shown, the construction machine 1 is designed as a vehicle trailer 12. The base frame 5 forms a chassis 13 of the vehicle trailer 12. Alternatively, the base frame 5 can be attached to a separately implemented chassis 13 of the vehicle trailer 12, although this is not shown in the figures. The chassis 13 can be designed as a chassis frame. At least one wheel axle RA is arranged on the chassis 13. The wheel axle RA has at least two wheels 14 - in this case exactly two - arranged opposite one another along the transverse direction Q of the construction machine. There can be several wheel axles RA arranged at a distance from one another along the longitudinal direction L of the construction machine, each having at least two wheels 14, for example forming a tandem axle.

[0045] The chassis 13 has, at the front of the first end 6 of the construction machine, a towing device 15 for coupling the vehicle trailer 12 to a towing vehicle. The towing vehicle can be a tractor, for example a motor vehicle. The towing vehicle can be equipped with a coupling device designed to complement the towing device 5. When the vehicle trailer 12 is coupled to the towing vehicle, the towing device 15 can rest on the coupling device of the towing vehicle, transmitting a support load along the direction of gravity G. The towing vehicle itself is supported on the ground U. Thus, the vehicle trailer 12 is supported on the ground U at its towing device 15 by means of the towing vehicle. The vehicle trailer 12 is additionally supported on the ground U by means of the wheels 14. Accordingly, one of the support points P1, P2, P3 is arranged on the towing device 15 and on each of the wheels 14.

[0046] The at least one wheel axle RA is assigned a central axis RM extending along the transverse direction Q of the construction machine. If - as in the embodiments shown - only a single wheel axle RA is present, the central axis RM corresponds to the wheel axle RA. In the event that multiple wheel axles RA are present, the central axis RM runs centrally between the multiple wheel axles RA. The towing device 15 and the central axis RM are arranged at a distance D from one another along the longitudinal direction L of the construction machine. In the plan view of the construction machine 1, the total 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. The first section D1 faces the towing device 15 and the second section D2 faces the central axis RM.The first section D1 therefore extends from the towing device 15 to the total mass center of gravity SM, with the second section D2 extending from the central axis RM to the total mass center of gravity SM. The 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. The total mass of the construction machine 1 is, for example, 3500 kg. The construction machine 1 has, for example, a support frame 17. The electrical energy storage device 2 is arranged on the support frame 17. The support frame 17 is attached to the base frame 5. The electrical energy storage device 2 is arranged at least partially above the base frame 5, counter to the direction of gravity G.In the present case, the electrical energy storage device 2 is arranged entirely above the base frame 5. However, it is also conceivable that the electrical energy storage device 2 is alternatively arranged at least partially overlapping the base frame 5 along the direction of gravity G, resulting in a recessed arrangement of the electrical energy storage device 2 relative to the base frame 5.

[0047] The construction machine 1 has, for example, an intermediate frame 18. At least one electrical storage module 19 of the electrical energy storage device 2 is arranged on the intermediate frame 18. The intermediate frame 18 and the support frame 17 are connected to one another rigidly or flexibly for at least partial mutual mechanical decoupling. The electrical energy storage device 2 can be attached to the support frame 17 by means of the intermediate frame 18. In the present case, the intermediate frame 18 and the support frame 17 are connected to one another at three connection points 20, as can be seen in particular in Figs. 9 and 10. It is understood that more than the three connection points 20 shown can also be provided for connecting the intermediate frame 18 and the support frame 17. Under certain circumstances, fewer than three connection points 20 can be present, i.e. one or two.The mounting of the electrical storage modules 19 by means of the intermediate frame 18 and the support frame 19, as shown in Figs. 9 and 10, can be implemented in both of the embodiments according to Figs. 1 to 4 and 5 to 8. The at least three connection points 20 can be implemented by means of screw connections 21. Alternatively or additionally, an elastomer bearing 22 can be present at each connection point 20 in order to achieve a flexible connection between the intermediate frame 18 and the support frame 17. This enables a partial decoupling of the intermediate frame 18 from the support frame 17 and the base frame 5, so that any twisting or vibration of the base frame 5 that may occur during operation of the construction machine 1 is not transmitted to the electrical energy storage device 2, or at least is transmitted only to a reduced extent.

[0048] The electrical energy storage device 2 comprises at least two electrical storage modules 19. In the present case, the electrical energy storage device 2 comprises precisely two electrical storage modules 19, which are arranged adjacent to one another along the longitudinal direction L of the construction machine. 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 such electrical battery cell packs, which are stacked one above the other along the direction of gravity G. The electrical drive device 3 is arranged, for example, along the transverse direction Q of the construction machine between the two machine sides 8, 9. In the present case, the electrical drive device 3 is arranged off-center between the two machine sides 8, 9. Alternatively, the electrical drive device 3 can be arranged centrally between the construction machine sides 8, 9.The construction machine 1 in the present case has an electric auxiliary drive device 23. The electric auxiliary drive device 23 serves to drive auxiliary units of the construction machine 1. The electric auxiliary drive device 23 is electrically connected to the electrical energy storage device 2. In this case, the electric drive device 3 and the electric auxiliary drive device 23 are arranged along the construction machine longitudinal direction L at essentially the same distance from the first construction machine end 6. The electric drive device 3 and the electric auxiliary drive device 23 are arranged opposite one another along the construction machine transverse direction Q, eccentrically between the two construction machine sides 8, 9. In particular, the electric drive device 3 and the electric auxiliary drive device 23 are arranged symmetrically to the construction machine central longitudinal axis L in the plan view of the construction machine 1.

[0049] Alternatively, the electric drive device 3 and the electric

[0050] Auxiliary drive device 23 are arranged at a distance from one another along the longitudinal direction of the construction machine. The electric drive device 3 and the electric

[0051] Auxiliary drive devices 23 can be arranged at the same height or offset from one another along the direction of gravity G. There can be a plurality of electric auxiliary drive devices 23. The electric drive device 3 and the plurality of electric auxiliary drive devices 23 can be arranged next to one another, 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 electric drive device 3 and / or at least one of the electric auxiliary drive devices 23 can be arranged offset from the electrical energy store 2 along the construction machine longitudinal direction L. The electric drive device and / or the electric 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 base frame 5.

[0052] For example, an electrical converter 24 of the construction machine 1 is arranged on the electrical drive device 3. Alternatively or additionally, 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 storage device 2 by means of an electrical converter 24. An electrical system of the construction machine 1 is, for example, attached directly to an upper side of the electrical energy storage device 2, which is located opposite the direction of gravity G. The electrical system can have at least one electronic control unit for controlling and / or regulating the electrical drive device 3 and / or the electrical auxiliary drive device 23.In addition, the electrical system may comprise an electric starter battery and / or an electronic charger for charging the electrical energy storage device 3 and / or an electrical converter and / or an electrical distributor.

[0053] The thick matter pump unit 4 in the present case has a water tank 25 for supplying the delivery cylinders of the thick matter pump unit 4 with cooling and / or flushing water. The cooling and / or flushing water can be accommodated in an interior of the water tank 25. Piston rods and an underside of the delivery pistons of the delivery cylinders facing away from the delivery chambers of the delivery cylinders can be wetted with the cooling and / or flushing water accommodated 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 along the longitudinal direction L of the construction machine between the delivery cylinders of the thick matter pump unit 4 and the electrical energy storage device 2. For example, the water tank 5 is arranged along the longitudinal direction L of the construction machine between the electrical drive device 3 and the electrical energy storage device 2.The water tank 5 can be arranged between the delivery cylinders of the thick matter pump unit 4 and hydraulic or electric linear drives, each of which is assigned to one of the delivery cylinders.

[0054] The water tank 25 is closed, for example, by a removable cover 26 of the thick matter pump unit 4. The construction machine 1 has a free space 27. The free space 27 serves to remove the cover 26 from the water tank 25. The free space 27 is arranged above the water tank 25, counter to the direction of gravity G. The water tank 25 can form a maintenance opening for servicing the thick matter pump unit 4. Wear parts of the thick matter pump unit 4 can be replaced, in particular regularly, via the maintenance opening. The water tank 25 has, for example, a drain device by means of which the cooling and / or rinsing water can be drained out of the interior of the water tank 25. The drain device of the water tank 25 can be actuated from above via the interior of the water tank 25, for example, when the cover 26 is removed. The construction machine 1 has, for example, a temperature control system.The temperature control system serves to cool and / or heat the electrical energy storage device 2. The construction machine 1 can have a casing which is fastened to the support frame 5 and which shields the components of the construction machine 1 from an external environment of the construction machine 1.

Claims

Patent claims 1. Construction machine (1) for conveying thick material, comprising: an electrical energy storage device (2) for storing electrical energy, an electrical drive device (3) which is electrically connected to the electrical energy storage device (2) for supplying it with electrical energy, a thick material pump unit (4) which is designed to convey the thick material, a base frame (5) which carries the electrical energy storage device (2), the electrical drive device (3) and the thick material pump unit (4), which is arranged along a construction machine longitudinal direction (L) from a first Construction machine end (6) is longitudinally extended to a second construction machine end (7) and is transversely extended along a construction machine transverse direction (Q) between a first and a second construction machine side (8, 9), wherein the The construction machine longitudinal direction (L) and the construction machine transverse direction (Q) are oriented perpendicular to one another and perpendicular to a direction of gravity (G), and which has at least three support points (P1, P2, P3) spaced apart from one another transversely to the direction of gravity (G), at which support points the construction machine (1) is supported relative to a subsurface (U), wherein in a plan view of the construction machine (1) a support surface (A) of the construction machine (1) extends between the support points (P1, P2, P3), wherein the electrical energy store (2), the electrical drive device (3), the thick matter pump unit (4) and the base frame (5) are arranged relative to one another in such a way that an overall center of mass (SM) of the construction machine (1) in the plan view of the construction machine (1) is arranged within the support surface (A) and along the construction machine longitudinal direction (L) at a distance from a geometric center of gravity (SA) of the support surface (A).

2. Construction machine (1) according to claim 1, characterized in that the construction machine (1) further comprises: a hydraulic pump (10) which is driven by means of the electric drive device (3) and which feeds a hydraulic circuit (11), wherein the thick matter pump unit (4) is fed from the hydraulic circuit (11) for its drive.

3. Construction machine (1) according to claim 1 or 2, characterized in that the total mass center of gravity (SM) in the plan view is arranged substantially on a construction machine center longitudinal axis (LA) which runs along the construction machine longitudinal direction (L).

4. Construction machine (1) according to one of the preceding claims, characterized in that the construction machine (1) is designed as a vehicle trailer (12), the base frame (5) forms a chassis (13) of the vehicle trailer (12) or is fastened to a chassis (13) of the vehicle trailer (12), and at least one wheel axle (RA) with at least two wheels (14) opposite one another along the transverse direction (Q) of the construction machine is arranged on the chassis (13), and the chassis (13) has a towing device (15) for coupling to a towing vehicle at the front of the first end (6) of the construction machine, wherein one of the support points (P1, P2, P3) is arranged on the towing device (15) and on each of the wheels (14).Construction machine (1) according to claim 4, characterized in that the traction device (15) and a central axis (RM) assigned to the at least one wheel axle (RA) are arranged at a distance (D) from one another along the construction machine longitudinal direction (L), the total mass center of gravity (SM) divides the distance (D) in the plan view of the construction machine (1) between the traction device (15) and the central axis (RM) into a first section (D1) facing the traction device (15) and a second section (D2) facing the central axis (RM), and a ratio of the first section (D1) to the second section (D2) is 4 to 75, in particular 5.6 to 66.Construction machine (1) according to one of the preceding claims, characterized in that the construction machine (1) has a support frame (17), wherein the electrical energy storage device (2) is arranged on the support frame (17) and the support frame (17) is attached to the base frame (5), in particular wherein the electrical energy storage device (2) is arranged at least partially, in particular completely, above the base frame (5) against the direction of gravity (G).

7. Construction machine (1) according to claim 6, characterized in that the construction machine (1) has an intermediate frame (18), wherein at least one electrical storage module (19) of the electrical energy storage device (2) is arranged on the intermediate frame (18), in particular such that the electrical energy storage device (2) is attached to the support frame (17) by means of the intermediate frame (18), wherein the intermediate frame (18) and the support frame (17) are connected to one another rigidly or flexibly, in particular at at least three connection points (20), for at least partial mutual mechanical decoupling.

8. Construction machine (1) according to one of the preceding claims, characterized in that the electrical drive device (3) is arranged centrally or off-center along the transverse direction (Q) of the construction machine between the two sides (8, 9) of the construction machine.Construction machine (1) according to one of the preceding claims, characterized in that an electric auxiliary drive device (23) of the construction machine (1) for driving auxiliary units of the construction machine (1) is electrically connected to the electrical energy storage device (2).

10. Construction machine (1) according to claim 9, characterized in that the electric drive device (3) and the electric auxiliary drive device (23) are arranged along the construction machine longitudinal direction (L) at substantially the same distance from the first construction machine end (6) and along the construction machine transverse direction (Q) opposite one another off-center between the two construction machine sides (8, 9), in particular in a plan view of the construction machine (1) symmetrical to the construction machine central longitudinal axis (LA).Construction machine (1) according to one of the preceding claims, characterized in that the electric drive device (3) and an electric auxiliary drive device (23) of the construction machine (1) are arranged at a distance from one another along the construction machine longitudinal direction (L).

12. Construction machine (1) according to one of the preceding claims, characterized in that an electrical converter (24) is arranged on the electrical drive device (3) and / or on the electrical auxiliary drive device (23), by means of which the electrical drive device (3) and / or the electrical auxiliary drive device (23) are / is electrically connected to the electrical energy storage device (2).

13. Construction machine (1) according to one of the preceding claims, characterized in that the thick matter pump unit (4) has a water tank (25) for supplying delivery cylinders of the thick matter pump unit (4) with cooling and / or flushing water, and the water tank (25) is arranged along the longitudinal direction (L) of the construction machine between delivery cylinders of the thick matter pump unit (4) and the electrical energy storage device (2), in particular between the electrical drive device (3) and the electrical energy storage device (2).Construction machine (1) according to one of the preceding claims, characterized in that the water tank (25) is closed by means of a removable cover (26) of the thick matter pump unit (4), wherein the construction machine (1) has a free space (27) for removing the cover (26), which is arranged above the water tank (25) against the direction of gravity (G).

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