CONSTRUCTION MACHINE FOR CONVEYING THICK MATERIAL

Description

[0001] The invention relates to a construction machine for conveying thick material.

[0002] From EP 3 942 181 A1, a construction machine for conveying viscous material is known, which has a viscous material pump unit designed for conveying the viscous material. The viscous material pump unit of the known construction machine can be driven by a drive motor of the construction machine to convey the viscous material. The drive motor can be an electric motor.

[0003] EP 3 023 212 A1 discloses a vehicle for spraying concrete, which is equipped with a system suitable for moving the vehicle, for driving a mechanical arm for spraying the concrete, and for operating possible additional functions.

[0004] DE 2021 103 018 U1 discloses a high-viscosity pump comprising a chassis and a pump assembly attached to the chassis with a pumping device for conveying high-viscosity material,

[0005] EP 4 112 929 A1 discloses a trailer arrangement with an electrically driven concrete pump.

[0006] The object of the invention is to create a construction machine for conveying thick material that, on the one hand, can be placed on a surface in a particularly safe and stable manner and, on the other hand, can be transported in a particularly safe manner.

[0007] This problem is solved by the subject matter of claim 1. Preferred embodiments are the subject matter of the dependent claims.

[0008] A construction machine according to the invention is used for conveying viscous materials. The construction machine has an electrical energy storage device for storing electrical energy and an electric drive unit. The electric drive unit is electrically connected to the electrical energy storage device for its supply of electrical energy. By means of the electric drive unit, electrical energy drawn from the electrical energy storage device can be converted at least partially into kinetic energy. The construction machine also has a viscous material pump unit designed for conveying the viscous material. The viscous material pump unit is connected to the electric drive unit for drive purposes. In addition, the construction machine has a base frame. The base frame supports the electrical energy storage device, the electric drive unit, and the viscous material pump unit.The base frame extends longitudinally along a longitudinal direction of the construction machine from one end to the other. The base frame also extends transversely along a transverse direction between the first and second sides of the machine. The longitudinal and transverse directions are perpendicular to each other and to a direction of gravity. The base frame has at least three support points spaced apart from each other transversely to the direction of gravity. The construction machine is supported against a ground at these support points. In a top view of the construction machine, a support surface of the machine extends between the support points.The electrical energy storage unit, the electric drive unit, the slurry pump unit, and the base frame are arranged relative to each other such that the overall center of gravity of the construction machine, viewed from above, is located within the support surface. Furthermore, the overall center of gravity is positioned at a distance along the longitudinal direction of the construction machine from the geometric centroid of the support surface.

[0009] As a result of the aforementioned arrangement, the construction machine exhibits particularly good stability, meaning its susceptibility to tipping over is exceptionally low. Furthermore, this arrangement advantageously facilitates particularly safe transport of the machine, especially when transported as cargo on a trailer or when the machine itself is designed as a trailer. This is because the machine's center of gravity is positioned at a distance from the center of gravity of the support surface, allowing the machine's total mass to be distributed among the support points in such a way that at least one support point is subjected to a lower load than the others. This results in a particularly good compromise between stability and the machine's maneuverability and, in particular, its ability to move.

[0010] 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 a support point can occur directly, i.e., through direct contact of the support point with the ground, or indirectly, i.e., via a component designed to be interposed. The support points can each be located within a corresponding contact surface of the construction machine, where the weight force is transferred. At least three such contact surfaces can be present, arranged at a distance from one another, or at least two of which can merge directly into one another.

[0011] In this context, "thick material" refers to a paste-like mixture of different substances. Examples of thick material include mortar, cement, screed, or concrete, each in a mixable and / or pumpable state. In this mixable and / or pumpable state, the thick material has not yet hardened. Specifically, thick material is a building material.

[0012] In this embodiment of the invention, the construction machine has a hydraulic pump that is driven by the electric drive unit and supplies a hydraulic circuit of the construction machine. The high-viscosity pump unit is also powered from this hydraulic circuit. The high-viscosity pump unit can therefore be connected to the electric drive unit via the hydraulic pump and the hydraulic circuit. The hydraulic pump and the hydraulic circuit are arranged in such a way as to achieve the aforementioned positioning of the overall center of gravity. Advantageously, the hydraulic pump and the hydraulic circuit allow for a particularly high drive power to be provided to the high-viscosity pump unit.

[0013] In a further embodiment of the invention, the overall center of gravity is essentially arranged on a central longitudinal axis of the construction machine in a top view, which runs along the longitudinal direction of the construction machine. The central longitudinal axis of the construction machine runs midway between the two sides of the construction machine. This results in a particularly low tendency to tip over with respect to the central longitudinal axis of the construction machine.

[0014] According to the invention, the construction machine is designed as a vehicle trailer. The base frame of the construction machine forms the 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 opposite each other along the transverse direction of the construction machine is arranged on the chassis. The chassis also has a drawbar 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 a commercial vehicle trailer. One of the support points is arranged on the drawbar and on each of the wheels.The varying load distribution across the support points, as explained above, allows for the formation of a vertical load on the drawbar within legally permissible limits. Preferably, the least loaded support point is located on the drawbar. Due to the positioning of the overall center of gravity, the trailer proves to be particularly maneuverable, especially when uncoupled from the towing vehicle. In this uncoupled state, the least loaded support point can shift from the drawbar to a support wheel on the trailer's drawbar, positioned at a distance from the wheel axle, or to another support device located on the drawbar.

[0015] According to the invention, the towing device and a central axis, particularly a virtual one, associated with at least one wheel axle, are arranged at a distance from each other along the longitudinal direction of the construction machine. The central axis runs parallel to the at least one wheel axle. In a top view of the construction machine, the overall center of mass 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, particularly 5.7 to 66. In this way, a portion of the weight force acting on the construction machine, which can be transferred to the ground as a support load by means of the towing device and a towing vehicle, can be determined in such a way that particularly good handling characteristics of the combination of towing vehicle and trailer are achieved.Accordingly, the vehicle trailer formed by the construction machine proves to be particularly stable and maneuverable in combination.

[0016] 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, which in turn is attached to the base frame. In particular, the electrical energy storage device is arranged at least partially, and especially completely, above the base frame, against the direction of gravity. Advantageously, the electrical energy storage device is thus particularly easily accessible from one side of the construction machine, which simplifies its installation and / or maintenance. Alternatively, the electrical energy storage device can also be partially lowered—i.e., recessed—relative to the support frame along the direction of gravity, which advantageously allows for a particularly low center of gravity with respect to the direction of gravity.

[0017] 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 system is arranged on the intermediate frame. In particular, the electrical energy storage system is attached to the support frame by means of the intermediate frame. The intermediate frame and the support frame are rigidly connected to each other or flexibly connected to each other for at least partial mechanical decoupling. In particular, the intermediate frame and the support frame are connected to each other at at least three connection points. The connection points can be formed by bolted connections and / or elastomeric bearings. A rigid 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.

[0018] In a further embodiment of the invention, the electric drive unit is arranged centrally or eccentrically along the transverse direction of the construction machine between the two sides. The central arrangement of the drive unit between the two sides of the construction machine facilitates a central positioning of the overall center of gravity with respect to the transverse direction of the construction machine. In contrast, the eccentric arrangement of the electric drive unit with respect to the transverse direction of the construction machine offers the advantage of accessibility to the electric drive unit, for example, for assembly and / or maintenance purposes.

[0019] In a further embodiment of the invention, an electric auxiliary drive unit 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 unit of the construction machine can be arranged such that the aforementioned positioning of the overall center of gravity is achieved. Several electric auxiliary drive units and auxiliary units can be present.

[0020] In a further embodiment of the invention, the electric drive unit and the electric auxiliary drive unit are arranged along the longitudinal direction of the construction machine at substantially the same distance from the first end of the machine. Furthermore, the electric drive unit and the electric auxiliary drive unit are arranged opposite each other along the transverse direction of the machine, off-center between the two sides of the machine, and, in particular, symmetrically to the central longitudinal axis of the machine when viewed from above. Advantageously, this arrangement provides excellent access to both the electric drive unit and the electric auxiliary drive unit, especially for assembly and / or maintenance purposes. The auxiliary drive unit can also act as a counterweight for the electric drive unit.

[0021] In a further, and in particular alternative, embodiment of the invention, the electric drive unit and the electric auxiliary drive unit of the construction machine are arranged at a distance from each other along the longitudinal direction of the construction machine. In this way, the available installation space can be used particularly well.

[0022] In a further embodiment of the invention, an electrical converter is arranged on the electric drive unit and / or on the electric auxiliary drive unit. The electric drive unit and / or the electric auxiliary drive unit are electrically connected to the electrical energy storage device by means of the electrical converter. Advantageously, the converter can be used to convert a direct current voltage available at the electrical energy storage device into an alternating current voltage required for the operation of the electric drive unit and / or the electric auxiliary drive unit.

[0023] In a further embodiment of the invention, the high-efficiency pump unit includes a water tank for supplying the pumping cylinders of the high-efficiency pump unit with cooling and / or rinsing water. The water tank is arranged along the longitudinal direction of the construction machine between the pumping cylinders of the high-efficiency pump unit and the electrical energy storage device. Preferably, the water tank is arranged along the longitudinal direction of the construction machine between the electrical drive unit and the electrical energy storage device. The water tank can be arranged between the working cylinders and the pumping cylinders of the high-efficiency pump unit. The working cylinders can be supplied from the hydraulic circuit of the construction machine. However, the working cylinders can also be designed as electric linear actuators of the electrical drive unit. Electric linear actuators can be provided instead of working cylinders.The electrical energy storage device can be arranged above the working cylinders or the linear drives.

[0024] In a further embodiment of the invention, the water tank is closed by means of a removable cover on the high-viscosity pump unit. The cover is preferably removable from the water tank against the direction of gravity. The construction machine has a recess for removing the cover. This recess is located above the water tank, against the direction of gravity. Advantageously, the water tank provides a maintenance opening accessible from above. Wear parts of the high-viscosity pump unit can be replaced through this maintenance opening for the purpose of maintaining the pump unit.

[0025] Further advantages and features of the invention will become apparent from the claims and from the following description of preferred embodiments of the invention, which are illustrated with reference to the drawings. In this context, identical reference numerals refer to identical, similar, or functionally equivalent components.

[0026] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention. Fig. 1 shows a schematic perspective view of an embodiment of a construction machine according to the invention, Fig. 2 the construction machine according to Fig. 1 In another schematic perspective view, Fig. 3, the construction machine is shown in a schematic side view. Fig. 1 and 2 , Fig. 4 in schematic top view the construction machine according to the Figs. 1 to 3 Fig. 5 shows a further embodiment of a construction machine according to the invention in a schematic perspective view, Fig. 6 shows the construction machine according to Fig. 5 In a schematic perspective view, Fig. 7 the construction machine according to the Fig. 5 and 6 In schematic side view, Fig. 8, the construction machine according to the Figs. 5 to 7 In schematic top view, Figs. 9 and 10, and schematic perspective views, a storage system for an electrical energy storage device of the construction machine according to the Figs. 1 to 4 or 5 to 8 .

[0027] A construction machine 1 is designed for conveying viscous materials. These viscous materials include, for example, building materials in a thick, highly viscous form. They can be a paste-like mixture of different substances. In particular, they include mortar, cement, screed, or concrete, each in a mixable and / or conveyable state.

[0028] Construction machine 1 has an electrical energy storage device 2 for storing electrical energy. Construction machine 1 also includes an electric drive unit 3. The electric drive unit 3 is electrically connected to the electric energy storage device 2 for its supply of electrical energy. The electric drive unit 3 converts electrical energy from the electric energy storage device 2 into kinetic energy. Construction machine 1 also has a high-viscosity pump unit 4. The high-viscosity pump unit 4 is designed for conveying the high-viscosity material. The high-viscosity pump unit 4 can be connected to the electric drive unit 3 for drive purposes.

[0029] The high-viscosity pump unit 4 can have conveying cylinders with variable-volume conveying chambers. To change the volumes of the conveying chambers, particularly in opposite directions, the conveying cylinders can each have an adjustable conveying piston. The high-viscosity pump unit 4 can also include an S-shaped S-tube, which is connected at one end to a pressure port serving as the pump outlet. The S-tube can be arranged in a storage chamber for storing high-viscosity material, which can be filled with it from above. The S-tube can be rotatably mounted at one end on the pressure port within the storage chamber. The variable-volume conveying chambers can open into the storage chamber. The S-tube can be pivoted within the storage chamber relative to the conveying chambers in such a way that it can be alternately connected to one of the conveying chambers via a fluid connection.In this way, by the interplay of pivoting the S-pipe and changing the volume of the conveying chambers, the viscous material in the storage chamber can be alternately drawn in by the conveying chambers and pumped out through the S-pipe and the pressure port. An agitator can be arranged in the storage chamber of the viscous material pumping unit 4.

[0030] The construction machine 1 also has a base frame 5. The base frame 5 supports the electrical energy storage device 2, the electric drive unit 3, and the high-density pump unit 4. The base frame 5 extends along a longitudinal direction L of the construction machine. Specifically, the base frame 5 extends along the longitudinal direction L from a first end 6 of the construction machine to a second end 7. A transverse direction Q of the construction machine runs perpendicular to the longitudinal direction L. The base frame 5 extends transversely along the transverse direction Q between a first and a second side 8, 9 of the construction machine. Both the longitudinal direction L and the transverse direction Q of the construction machine are oriented perpendicular to a gravitational direction G. The longitudinal direction L, the transverse direction Q, and the gravitational direction G thus form three axes of a three-dimensional Cartesian coordinate system.

[0031] The base 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. A support point is understood to be a geometric point on the construction machine 1 that is designed to transfer at least a portion of the weight force acting on the construction machine 1. For example, a portion of the weight force can be transferred directly into a ground U on which the construction machine 1 rests at such a support point. However, it is also possible that a portion of the weight force at such a support point is not transferred directly into the ground U, but into another device or assembly that is in turn placed on the ground U. Each support point P1, P2, P3 can be located within a bearing surface of a support element of the construction machine 1.Such a support device can be a wheel 14, a support 28, a support wheel 16, a towing device 15, skids or a tracked or crawler undercarriage of the construction machine 1.

[0032] In a top 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 thus formed by the 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, exactly three support points P1, P2, P3 are present, resulting in a triangular support surface A. However, it is also conceivable that more than three support points P1, P2, P3 are present, resulting in a support surface A with a non-triangular shape, for example, a quadrilateral or other polygonal shape.

[0033] The electrical energy storage unit 2, the electrical drive unit 3, the high-viscosity pump unit 4, and the base frame 5 significantly determine the location of the overall center of mass SM of the construction machine 1. The electrical energy storage unit 2, the electrical drive unit 3, the high-viscosity pump unit 4, and the base frame 5 are arranged relative to each other such that the overall center of mass SM of the construction machine 1 is located within the support surface A when viewed from above. The support surface A has a geometric centroid SA. In the top view of the construction machine 1, the overall center of mass SM is located at a distance from the geometric centroid SA. This is particularly evident in the Fig. 4 and 8 recognizable.

[0034] In the embodiment according to the Figs. 1 to 4Construction machine 1 has a hydraulic pump 10. The hydraulic pump 10 supplies a hydraulic circuit 11 of construction machine 1. The hydraulic pump 10 is driven by the electric drive unit 3. A drive connection between the electric drive unit 3 and the high-viscosity 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 high-viscosity pump unit 4 can be connected, for example mechanically, to a hydraulic cylinder of the high-viscosity pump unit 4, with the hydraulic cylinders being supplied 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 the volume of the delivery volume associated with the respective delivery cylinder can be varied.Each delivery piston can be connected to a piston rod, which, on the opposite side from the respective delivery piston, is connected to a hydraulic piston of the corresponding hydraulic cylinder. If one of the hydraulic pistons is pressurized via hydraulic circuit 11 to adjust the respective hydraulic piston, the adjustment of the respective hydraulic piston is also transmitted via the piston rod to the corresponding delivery piston, resulting in a change in the volume of the associated delivery chamber. The high-viscosity pump unit 4 is therefore powered by hydraulic circuit 11. The hydraulic pump 11 is, for example, supported by the base frame 5.

[0035] In contrast to the embodiment according to the Figs. 1 to 4 are in the further embodiment according to the Figs. 5 to 8The construction machine 1 has no hydraulic circuit 11 and no hydraulic pump 10. Instead, the electric drive unit 3 is directly connected to the pump unit 4. For this purpose, each of the conveying cylinders of the high-viscosity pump unit 4 can be connected to the electric drive unit 3 by means of an electric actuator. For example, an electric linear actuator can be provided for each conveying cylinder, by means of which the volumes of the conveying chambers of the conveying cylinders can be changed. For this purpose, the conveying pistons of the conveying cylinders can be adjusted by means of the electric linear actuators of the electric drive unit 3. Instead of the hydraulic cylinders of the embodiment according to the Figs. 1 to 4Electric linear actuators can therefore be used. Instead of rotary hydraulic drives – for example, for rotating the agitator and / or pivoting the S-pipe – electric rotary drive units can be used.

[0036] In the top view of construction machine 1 - see in particular Fig. 4 and 8 The overall center of mass SM is essentially located on a longitudinal axis LA of the construction machine. The longitudinal axis LA of the construction machine runs along the longitudinal direction L of the construction machine. In a top view, the electrical energy storage device 2 can, for example, be located entirely within one half of the extent of the construction machine 1 along the longitudinal direction L of the construction machine. This can be the half of the extent of the construction machine 1 that includes the first end 6 of the construction machine.

[0037] 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, which 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 – in this case exactly two – wheels 14 opposite each other along the transverse direction Q of the construction machine. Several wheel axles RA, each with at least two wheels 14, can be arranged at intervals along the longitudinal direction L of the construction machine, for example, forming a tandem axle.

[0038] The chassis 13 has a drawbar 15 at the front end 6 of the construction machine for coupling the trailer 12 to a towing vehicle. The towing vehicle can be a tractor unit, for example, a motor vehicle. The towing vehicle can be equipped with a coupling device that is complementary to the drawbar 5. When the trailer 12 is coupled to the towing vehicle, the drawbar 15 can rest on the coupling device of the towing vehicle, transmitting a vertical load along the direction of gravity G. The towing vehicle itself is supported on the ground U. Thus, the trailer 12 is supported on the ground U at its drawbar 15 by means of the towing vehicle. The trailer 12 is additionally supported on the ground U by means of its wheels 14. Accordingly, one of the support points P1, P2, P3 is arranged on the drawbar 15 and on each of the wheels 14.

[0039] Each of the at least one wheel axle RA is associated with 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 case of multiple wheel axles RA, the central axis RM runs centrally between the multiple wheel axles RA. The drawbar 15 and the central axis RM are arranged at a distance D from each other along the longitudinal direction L of the construction machine. In a top view of the construction machine 1, the overall center of mass SM divides the distance D between the drawbar 15 and the central axis RM into a first section D1 and a second section D2. The first section D1 faces the drawbar 15, and the second section D2 faces the central axis RM.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. The ratio of the first section D1 to the second section D2 is 4 to 75, particularly 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.

[0040] The construction machine 1, for example, has 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, opposite to the direction of gravity G. In this case, the electrical energy storage device 2 is arranged completely above the base frame 5. However, it is also conceivable that the electrical energy storage device 2 could alternatively be 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.

[0041] The construction machine 1, for example, has 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 rigidly connected to each other or flexibly connected to each other for at least partial 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, as shown in particular in the Figs. 9 and 10The intermediate frame 18 and the support frame 17 are recognizably connected to each other at three connection points 20. It is understood that more than the three connection points 20 shown may be provided for connecting the intermediate frame 18 and the support frame 17. In some circumstances, fewer than three connection points 20 may 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 the Figs. 9 and 10 As shown, in both embodiments, according to the Figs. 1 to 4 and 5 to 8 must be realized. The at least three connection points 20 can be realized by means of screw connections 21.

[0042] Alternatively or additionally, an elastomeric bearing 22 can be provided at each connection point 20 to achieve a flexible connection between the intermediate frame 18 and the support frame 17. This allows for 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 only to a reduced extent.

[0043] The electrical energy storage device 2 comprises at least two electrical storage modules 19. In this case, the electrical energy storage device 2 comprises exactly two electrical storage modules 19, which are arranged adjacent to each other 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 this 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.

[0044] The electric drive unit 3 is, for example, arranged along the transverse direction Q of the construction machine between the two machine sides 8, 9. In this case, the electric drive unit 3 is arranged off-center between the two machine sides 8, 9. Alternatively, the electric drive unit 3 can be arranged centrally between the construction machine sides 8, 9. The construction machine 1 has an electric auxiliary drive unit 23. The electric auxiliary drive unit 23 serves to drive auxiliary units of the construction machine 1. The electric auxiliary drive unit 23 is electrically connected to the electric energy storage device 2. The electric drive unit 3 and the electric auxiliary drive unit 23 are arranged along the longitudinal direction L of the construction machine at substantially the same distance from the first end 6 of the construction machine.The electric drive unit 3 and the electric auxiliary drive unit 23 are arranged opposite each other along the transverse direction Q of the construction machine, eccentrically between the two sides 8, 9 of the construction machine. In particular, the electric drive unit 3 and the electric auxiliary drive unit 23 are arranged symmetrically to the longitudinal axis L of the construction machine in a top view of the construction machine 1.

[0045] Alternatively, the electric drive unit 3 and the electric auxiliary drive unit 23 can be arranged at a distance from each other along the longitudinal direction of the construction machine. The electric drive unit 3 and the electric auxiliary drive unit 23 can be arranged at the same level or offset from each other along the direction of gravity G. Several electric auxiliary drive units 23 can be present. The electric drive unit 3 and the several electric auxiliary drive units 23 can be arranged side by side, one above the other, and / or one behind the other along the longitudinal direction L of the construction machine, along the transverse direction Q of the construction machine, and / or along the direction of gravity G. The electric drive unit 3 and / or at least one of the electric auxiliary drive units 23 can be arranged offset from the electric energy storage device 2 along the longitudinal direction L of the construction machine.The electric drive unit and / or the electric auxiliary drive unit 23 can be arranged below the electric energy storage device 2 with respect to the direction of gravity G. The electric energy storage device 2 can be arranged below the base frame 5.

[0046] For example, an electrical converter 24 of the construction machine 1 is arranged on the electrical drive unit 3. Alternatively or additionally, an electrical converter 24 is arranged on the electrical auxiliary drive unit 23. In this case, the electrical drive unit 3 and the electrical auxiliary drive unit 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, directly attached to an upper surface of the electrical energy storage device 2 located opposite the direction of gravity G. The electrical system can include at least one electronic control unit for controlling and / or regulating the electrical drive unit 3 and / or the electrical auxiliary drive unit 23.Furthermore, the electrical system may include 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.

[0047] The high-efficiency pump unit 4 includes a water tank 25 for supplying the pumping cylinders of the high-efficiency pump unit 4 with cooling and / or flushing water. The cooling and / or flushing water is contained within an interior space of the water tank 25. Piston rods and the underside of the pumping pistons of the pumping cylinders, facing away from the pumping chambers of the pumping cylinders, can be wetted by the cooling and / or flushing water contained 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 pumping cylinders of the high-efficiency 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 unit 3 and the electrical energy storage device 2.The water box 5 can be arranged between the conveying cylinders of the thick-substantiation pumping unit 4 and hydraulic or electric linear drives, each assigned to one of the conveying cylinders.

[0048] The water tank 25 is closed, for example, by means of a removable cover 26 of the high-viscosity pump unit 4. The construction machine 1 has a clearance 27. This clearance 27 serves to remove the cover 26 from the water tank 25. The clearance 27 is located above the water tank 25, opposite to the direction of gravity G. The water tank 25 can form a maintenance opening for servicing the high-viscosity pump unit 4. Wear parts of the high-viscosity pump unit 4 can be replaced, particularly regularly, via this 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 from the interior of the water tank 25 to the outside. The drain device of the water tank 25 can be operated from above, for example, through the interior of the water tank 25 when the cover 26 is removed.

[0049] Construction machine 1, for example, has a temperature control system. The temperature control system serves to cool and / or heat the electrical energy storage device 2. Construction machine 1 may have a casing that is attached to the support frame 5 and that shields the components of construction machine 1 from the external environment of construction machine 1.

Claims

1. Construction machine (1) for conveying thick matter, having: - an electrical energy store (2) for storing electrical energy, - an electrical drive device (3), which is electrically connected to the electrical energy store (2) in order to be supplied with electrical energy, - a thick matter pump unit (4), which is designed to convey the thick matter, - a main frame (5), - which supports the electrical energy store (2), the electrical drive device (3) and the thick matter pump unit (4), - which extends longitudinally from a first construction machine end (6) to a second construction machine end (7) along a construction machine longitudinal direction (L) and extends transversely between a first and a second construction machine side (8, 9) along a construction machine transverse direction (Q), wherein the construction machine longitudinal direction (L) and the construction machine transverse direction (Q) are oriented perpendicularly to each other and perpendicularly to a direction of gravity (G), and - which has at least three support points (P1, P2, P3) which are spaced apart from each other transversely to the direction of gravity (G) and at which the construction machine (1) is supported relative to an underlying surface (U), wherein 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), - wherein 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 an overall centre of mass (SM) of the construction machine (1) is arranged within the support area (A) in the top view of the construction machine (1) and at a distance from a geometric centre of gravity (SA) of the support area (A) along the construction machine longitudinal direction (L), - wherein the thick matter pump unit (4) is drive-connected to the electrical drive device (3), characterized in that - the construction machine (1) is in the form of a vehicle trailer (12), - the main frame (5) forms a chassis (13) of the vehicle trailer (12) or is fastened to a chassis (13) of the vehicle trailer (12), - at least one wheel axle (RA) with at least two wheels (14) situated opposite each other along the construction machine transverse direction (Q) is arranged on the chassis (13) and the chassis (13) has, at the front side of the first construction machine end (6), a towing device (15) for coupling to a towing vehicle, - a respective one of the support points (P1, P2, P3) is arranged on the towing device (15) and on each of the wheels (14), - the towing device (15) and a central axis (RM) associated with the at least one wheel axle (RA) are arranged at a distance (D) from each other along the construction machine longitudinal direction (L), - the overall centre of mass (SM) divides the distance (D) between the towing device (15) and the central axis (RM) into a first section (D1) closer to the towing device (15) and a second section (D2) closer to the central axis (RM) in the top view of the construction machine (1), and - a ratio of the first section (D1) to the second section (D2) is 4 to 75.

2. Construction machine (1) according to Claim 1, characterized in that the construction machine (1) further has: - a hydraulic pump (10), which is driven by means of the electrical drive device (3) and which feeds a hydraulic circuit (11), - wherein the thick matter pump unit (4) is fed from the hydraulic circuit (11) in order to be driven.

3. Construction machine (1) according to Claim 1 or 2, characterized in that the overall centre of mass (SM) is arranged substantially on a construction machine central longitudinal axis (LA), which runs along the construction machine longitudinal direction (L), in the top view.

4. Construction machine (1) according to any of the preceding claims, characterized in that - the ratio of the first section (D1) to the second section (D2) is 5.6 to 66.

5. Construction machine (1) according to any of the preceding claims, characterized in that - the construction machine (1) has a supporting frame (17), wherein the electrical energy store (2) is arranged on the supporting frame (17) and the supporting frame (17) is attached to the main frame (5), - in particular wherein the electrical energy store (2) is arranged at least partially, in particular entirely, above the main frame (5) counter to the direction of gravity (G).

6. Construction machine (1) according to Claim 5, characterized in that - the construction machine (1) has an intermediate frame (18), wherein at least one electrical storage module (19) of the electrical energy store (2) is arranged on the intermediate frame (18), in particular so that the electrical energy store (2) is attached to the supporting frame (17) by means of the intermediate frame (18), - wherein the intermediate frame (18) and the supporting frame (17) are connected to each other fixedly or, for at least partial mutual mechanical decoupling, flexibly, in particular at at least three connecting points (20).

7. Construction machine (1) according to any of the preceding claims, characterized in that the electrical drive device (3) is arranged centrally or eccentrically between the two construction machine sides (8, 9) along the construction machine transverse direction (Q).

8. Construction machine (1) according to any of the preceding claims, characterized in that an electrical auxiliary drive device (23) of the construction machine (1) is electrically connected to the electrical energy store (2) for driving auxiliary assemblies of the construction machine (1).

9. Construction machine (1) according to Claim 8, characterized in that 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) and opposite each other eccentrically between the two construction machine sides (8, 9) along the construction machine transverse direction (Q), in particular symmetrically with respect to the construction machine central longitudinal axis (LA), in a top view of the construction machine (1).

10. Construction machine (1) according to any of Claims 1 to 8, characterized in that the electrical drive device (3) and an electrical auxiliary drive device (23) of the construction machine (1) are arranged at a distance from each other along the construction machine longitudinal direction (L).

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

12. Construction machine (1) according to any of the preceding claims, characterized in that - the thick matter pump unit (4) has a water tank (25) for supplying conveying cylinders of the thick matter pump unit (4) with cooling and / or flushing water, and - the water tank (25) is arranged between conveying cylinders of the thick matter pump unit (4) and the electrical energy store (2), in particular between the electrical drive device (3) and the electrical energy store (2), along the construction machine longitudinal direction (L).

13. Construction machine (1) according to any of the preceding claims, characterized in that - a 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 clearance (27) for removing the cover (26), the clearance being arranged above the water tank (25) counter to the direction of gravity (G).