Vehicle-mounted concrete pump

Abstract

The invention relates to a vehicle-mounted concrete pump (1), wherein the vehicle-mounted concrete pump comprises: a concrete pump system (2), wherein the concrete pump system (2) is designed to convey concrete; a hydraulic drive pump system (3), wherein the hydraulic drive pump system (3) is designed to drive the concrete pump system (2) and comprises a hydraulic pump drive shaft (4); an electric motor (5), wherein the electric motor (5) is designed to drive the hydraulic pump drive shaft (4) of the hydraulic drive pump system (3) and has an electric motor shaft (6); and a drive motor system (7), wherein the drive motor system (7) is designed to drive the electric motor shaft (6) in order to drive the hydraulic pump drive shaft (4) of the hydraulic drive pump system (3) by means of the electric motor shaft (6).

Description

[0001] Truck-mounted concrete pump

[0002] Area of ​​application and state of the art

[0003] The invention relates to a truck-mounted concrete pump.

[0004] TASK AND SOLUTION

[0005] It is an object of the present invention to provide a truck-mounted concrete pump with improved properties. In particular, a particularly compact truck-mounted concrete pump is to be created, particularly with regard to its wheelbase.

[0006] This problem is solved by the subject matter of the independent patent claim. Preferred embodiments are the subject matter of the dependent patent claims.

[0007] A truck-mounted concrete pump according to the invention, which is in particular a self-propelled work machine for conveying concrete at a construction site, has a concrete pumping system. The concrete pumping system is designed to convey concrete, in particular concrete that is flowable and / or ready for conveyance and / or has not yet hardened. The truck-mounted concrete pump also has a hydraulic drive pumping system. The hydraulic drive pumping system is designed to drive the concrete pumping system. The hydraulic drive pumping system has a hydraulic pump drive shaft. Furthermore, the truck-mounted concrete pump has an electric motor. The electric motor is designed to drive the hydraulic pump drive shaft of the hydraulic drive pumping system. The electric motor has an electric motor shaft. In particular, the electric motor shaft can be driven by an electric motor to drive the hydraulic pump drive shaft. The truck-mounted concrete pump also has a drive motor system.The drive motor system is designed to drive the electric motor shaft in order to drive the hydraulic pump drive shaft of the hydraulic drive pump system by means of the electric motor shaft. In particular, the drive motor system and the hydraulic pump drive shaft of the hydraulic drive pump system are drivingly connected to one another by means of the electric motor shaft. Drive power can thus be supplied to the hydraulic drive pump system via the electric motor shaft, wherein the drive power can be provided by the drive motor system and / or by the electric motor. The electric motor shaft can thus fulfill a dual function by transmitting drive power generated by the electric motor and drive power generated by the drive motor system.This dual function can eliminate the need for a separate, space-consuming transmission mechanism for transmitting the drive power generated by the drive motor system. Eliminating such a separate transmission mechanism saves installation space. Accordingly, a particularly compact truck-mounted concrete pump can be created, particularly in terms of its wheelbase.

[0008] The concrete can be fresh concrete, especially flowable and / or conveyable and / or not yet hardened. The concrete can be a building material and / or a thickened concrete.

[0009] The term “configured” can be used synonymously with the term “trained”.

[0010] The terms “comprises” or “has” can be used synonymously with each other and with the term “comprises”.

[0011] In an embodiment of the invention, the drive motor system comprises a drive device. In particular, the drive device comprises an internal combustion engine. The drive device can be drive-connected to a drivable wheel axle of the truck-mounted concrete pump in order to drive the truck-mounted concrete pump in a travel mode. The drive motor system also comprises a transfer case device, which is drive-connected, in particular directly, to the drive device. The transfer case device has a main output for driving the truck-mounted concrete pump and a power take-off for driving the hydraulic pump drive shaft of the hydraulic drive pump system.

[0012] For practical purposes, the power take-off can be referred to as an “engine-mounted power take-off”.

[0013] The power take-off can be designed and / or dimensioned depending on the maximum power required to drive the hydraulic drive pump system. The same can apply to those components of the truck-mounted concrete pump that can be driven by the power take-off.

[0014] For practical purposes, the maximum power required to drive the main drive pump system may be less than the maximum power available from the drive system. The maximum power available from the drive system may depend on the power required for the drive of the truck-mounted concrete pump.

[0015] The power take-off expediently has a power take-off shaft for drivingly connecting the drive device to the electric motor shaft and in particular to the hydraulic pump drive shaft by means of the electric motor shaft.

[0016] The main output drive expediently has a main output shaft for connecting the drive device to the travel drive transmission device.

[0017] The drive motor system expediently has a travel drive transmission device that is drive-connectable or drive-connected to the main output. The travel drive transmission device can be designed to drive-connect the drive motor system to the main output with a transmission ratio dependent on a selectable gear stage.

[0018] The transfer case is expediently flanged directly to the drive mechanism. In particular, the travel drive transmission is flanged directly to the transfer case, particularly opposite the drive mechanism. The transfer case can be arranged accordingly between the drive mechanism and the travel drive transmission.

[0019] The drive device and the transfer case device and the travel drive transmission device can expediently form a drive unit of the truck-mounted concrete pump.

[0020] In a further embodiment of the invention, the truck-mounted concrete pump has at least one travel drive axle. The drive motor system is designed to drive the at least one travel drive axle. In particular, the transfer case device is designed to be switchable such that the drive device can be mechanically connected either to the at least one travel drive axle of the truck-mounted concrete pump or to the electric motor shaft. In particular, the electric motor can run passively or be used as an electric generator, for example to charge an electrical energy storage device, in particular of the truck-mounted concrete pump, with electrical energy when the drive device is drive-connected to the electric motor shaft by means of the transfer case device. In a further embodiment of the invention, the electric motor shaft has a first shaft end for a drive coupling of the electric motor shaft to the drive motor system.In addition, the electric motor shaft has a second shaft end for driving the electric motor shaft to the hydraulic pump drive shaft. The first shaft end and the second shaft end are axially opposite each other.

[0021] “Axial” may refer to an axial direction along which the electric motor shaft is elongated from its first shaft end to its second shaft end and about which the electric motor shaft is rotatable to drive the hydraulic pump drive shaft.

[0022] In a further embodiment of the invention, the first shaft end and the second shaft end are opposite one another and are accessible for the drive coupling of the electric motor shaft to the drive motor system and to the hydraulic pump drive shaft. For example, the accessibility of the shaft ends can be achieved by the electric motor shaft protruding axially from a stator of the electric motor in such a way that the two shaft ends are arranged outside the stator. However, it is also conceivable for at least one of the shaft ends to be flush with the stator or, in particular, slightly inside the stator, provided that the respective shaft end is accessible for the respective drive coupling.

[0023] The electric motor expediently has a rotor that can rotate relative to the stator. In particular, the stator and rotor are arranged in a nested configuration. The electric motor shaft is, in particular, rigidly connected to the rotor. The electric motor can expediently be designed as an external rotor or an internal rotor.

[0024] In a further embodiment of the invention, the electric motor shaft is mechanically rigidly connected to the hydraulic pump drive shaft of the hydraulic drive pump system. Alternatively or additionally, the electric motor shaft is designed to be continuous, particularly for a through-drive from the drive motor system to the hydraulic pump drive shaft. Such a through-drive allows the truck-mounted concrete pump to be constructed with a particularly compact design.

[0025] In a further embodiment of the invention, the hydraulic drive pump system comprises a number of hydraulic drive pumps. In particular, the number of hydraulic drive pumps can be driven, in particular jointly, by means of the hydraulic pump drive shaft. In particular, the number of hydraulic drive pumps is flange-mounted to the electric motor. The hydraulic drive pumps can be arranged in series, one after the other. The number can be one, two, or more.

[0026] In a further embodiment of the invention, the electric motor is a liquid-cooled synchronous drive motor. The electric motor can, in particular, be water-cooled and / or hydraulically cooled. Alternatively or additionally, the electric motor can be air-cooled.

[0027] In a further embodiment of the invention, the truck-mounted concrete pump comprises a chassis. The chassis comprises the drive motor system. Furthermore, the chassis comprises a vehicle frame that supports the drive motor system. The truck-mounted concrete pump has a superstructure. The superstructure comprises the concrete pumping system and the hydraulic drive pumping system. The vehicle frame supports the superstructure. The superstructure is expediently arranged, in particular substantially and / or completely, above the vehicle frame and / or the drive motor system. "Above" can refer to a direction of gravity.

[0028] In a further embodiment of the invention, the body incorporates the electric motor. The electric motor included in the body can thus be conveniently arranged above the vehicle frame and / or the drive motor system. This can promote a desirable compact wheelbase for the truck-mounted concrete pump.

[0029] In a further embodiment of the invention, the drive motor system is mechanically connected to the electric motor shaft, in particular by means of a cardan shaft of the truck-mounted concrete pump.

[0030] The truck-mounted concrete pump expediently has a further cardan shaft for mechanically connecting the drive motor system to the at least one drive axle.

[0031] In a further embodiment of the invention, the truck-mounted concrete pump has a power grid connection. The power grid connection is electrically connected to the electric motor, in particular by an electrical converter of the truck-mounted concrete pump. In addition, the power grid connection is designed for electrical connection to an electrical construction site grid connection. By means of the power grid connection, electrical energy can be supplied to the electric motor from an electrical construction site network comprising the electrical construction site grid connection. In a further embodiment of the invention, the truck-mounted concrete pump has an electrical energy storage device, in particular with an electrical accumulator. The electrical energy storage device is electrically connected to the electric motor, in particular by an electrical converter, in particular the electrical converter of the truck-mounted concrete pump.In addition, the electrical energy storage device is designed to deliver electrical power to the electric motor. The electric motor can therefore be driven using electrical power from the electrical energy storage device.

[0032] In a further embodiment of the invention, the electrical energy storage device is electrically connected to the electricity grid connection, so that electrical power not required by the electric motor can be absorbed from the electricity grid connection by means of the electrical energy storage device, in particular in order to store electrical energy. The electrical energy storage device is designed to output electrical power when the electrical power output by the electrical energy storage device is required by the electric motor in addition to the electrical power from the electricity grid connection. In other words, the electrical energy storage device is designed to output the electrical power required by the electric motor in addition to the electrical power from the electricity grid connection.

[0033] In a further embodiment of the invention, the truck-mounted concrete pump has a concrete placing boom. The concrete placing boom is designed to distribute the conveyed concrete. The hydraulic drive pump system is designed to drive the concrete placing boom, in particular to adjust a boom tip of the concrete placing boom relative to the chassis of the truck-mounted concrete pump. The boom tip can support a discharge device of the truck-mounted concrete pump for discharging the conveyed concrete.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] It is understood that the features mentioned above and those to be explained below can be used not only in the respective combinations specified, but also in other combinations or alone, without departing from the scope of the present invention. Fig. 1 shows a schematic side view of an embodiment of a truck-mounted concrete pump according to the invention,

[0037] Fig. 2 shows a roughly schematic and highly simplified side view of the truck-mounted concrete pump according to Fig. 1 ,

[0038] Fig. 3 shows a schematic side view of a detail of the truck-mounted concrete pump according to Figs. 1 and 2,

[0039] Fig. 4 shows a roughly schematic and highly simplified side view of another embodiment of the truck-mounted concrete pump, and

[0040] Fig. 5 shows a schematic side view of a detail of the truck-mounted concrete pump according to Fig. 4.

[0041] DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] A truck-mounted concrete pump 1 has a concrete pumping system 2. The truck-mounted concrete pump 1 is designed to be self-propelled, for example, to be positioned at a construction site. The concrete pumping system 2 is designed to pump concrete.

[0043] The truck-mounted concrete pump 1 has a hydraulic drive pump system 3. The hydraulic drive pump system 3 is designed to drive the concrete pump system 2. The hydraulic drive pump system 3 has a hydraulic pump drive shaft 4. The hydraulic drive pump system 3 has, for example, a number of hydraulic drive pumps 18. According to Figs. 2 and 4, the number of hydraulic drive pumps 18 is, for example, three. The number of hydraulic drive pumps 18 can be flange-mounted to the electric motor 5.

[0044] The truck-mounted concrete pump 1 has an electric motor 5. The electric motor 5 is designed to drive the hydraulic pump drive shaft 4 of the hydraulic drive pump system 3. The electric motor 5 has an electric motor shaft 6. The electric motor 5 is designed here as a liquid-cooled synchronous drive motor 19.

[0045] The truck-mounted concrete pump 1 has a drive motor system 7. The drive motor system 7 is designed to drive the electric motor shaft 6. The drive motor system 7 is designed to drive the hydraulic pump drive shaft 4 of the hydraulic drive pump system 3 by means of the electric motor shaft 6. The drive motor system 7 and the hydraulic pump drive shaft 4 of the hydraulic drive pump system 3 are connected to one another via the electric motor shaft 6.

[0046] In this case, the truck-mounted concrete pump 1 also has a concrete placing boom 27. The concrete placing boom 27 is designed to distribute concrete delivered by the concrete pumping system 2. The concrete placing boom 27 can be driven, in particular adjustable, for example, by the hydraulic drive pumping system 3.

[0047] In the present case, the drive motor system 7 has a drive device 8. The drive device 8 can, for example, comprise an internal combustion engine BKM. In addition, the drive motor system 7 in the present case has a transfer case device 9 that is drive-connected to the drive device 8. For example, the transfer case device 9 is drive-connected directly to the drive device 8.

[0048] The transfer case device 9 has, for example, a main output 10 for driving the truck-mounted concrete pump 1. In this case, the transfer case device 9 also has a power take-off 11 for driving the hydraulic pump drive shaft 4 of the hydraulic drive pump system 3. The drive motor system 7 can have a travel drive transmission device 12 that is drive-connectable or drive-connected to the main output 10.

[0049] In the present case, the transfer case 9 is directly flanged to the drive device 8. For example, the travel drive transmission 12 is directly flanged to the transfer case 9, in this case opposite the drive device 8. The transfer case 9 is thus arranged between the drive device 8 and the travel drive transmission 12.

[0050] The drive device 8 and the transfer gear device 9 and the travel drive gear device 12 can form a drive unit of the truck-mounted concrete pump 1.

[0051] The power take-off 11 can be designed and dimensioned—alternatively or additionally—depending on the maximum power required to drive the hydraulic drive pump system 3. The same can apply to those components of the truck-mounted concrete pump 1 that can be driven by the power take-off 11. The maximum power required to drive the hydraulic drive pump system 3 can be less than the maximum power that can be provided by the drive device 8. The maximum power that can be provided by the drive device 8 can depend on the power required for a travel drive of the truck-mounted concrete pump 1.

[0052] The power take-off 11 may have a power take-off shaft for drivingly connecting the drive device 8 to the electric motor shaft 6 or the hydraulic pump drive shaft 4. The main output 10 may have a main output shaft for drivingly connecting the drive device 8 to the travel drive transmission device 12.

[0053] The truck-mounted concrete pump 1, for example, has at least one travel drive axle 13. The drive motor system 7 is designed here to drive the at least one travel drive axle 13. The transfer case device 9 can be designed to be switchable such that the drive device 8 can be mechanically connected either to the at least one travel drive axle 13 of the truck-mounted concrete pump 1 or to the electric motor shaft 6.

[0054] If the drive device 8 is drivingly connected to the electric motor shaft 6 via the transfer case device 9, the electric motor 5 can either run passively or be used as an electric generator. The electric motor 5 used as a generator can provide electrical energy, for example, to charge an electrical energy storage device 25, in this case the truck-mounted concrete pump 1, with electrical energy.

[0055] The electric motor shaft 6 in this case has a first shaft end 14, which serves to drive the electric motor shaft 6 to the drive motor system 7. The electric motor shaft 6 also has a second shaft end 15, which serves to drive the electric motor shaft 6 to the hydraulic pump drive shaft 4. The first shaft end 14 and the second shaft end 15 are axially opposite one another in this case. "Axial" can refer to an axial direction A, along which the electric motor shaft 6 extends from its first shaft end 14 to its second shaft end 15 and around which the electric motor shaft 6 is rotatable to drive the hydraulic pump drive shaft 4.

[0056] In the present case, the first shaft end 14 and the second shaft end 15 are opposite one another and are each accessible for drivingly coupling the electric motor shaft 6 to the drive motor system 7 and to the hydraulic pump drive shaft 4. The electric motor 5 can have a stator 16 and a rotor 17 rotatable relative to the stator 16. The stator 16 and the rotor 17 can be arranged in a nested manner. In this case, the electric motor shaft 6 is connected to the rotor 17 in a rotationally rigid manner. The electric motor shaft 6 is, for example, mechanically rigidly connected to the hydraulic pump drive shaft 4 of the hydraulic drive pump system 3. Alternatively or additionally, the electric motor shaft 6 is designed to be continuous, in particular for a through-drive from the drive motor system 7 to the hydraulic pump drive shaft 4, as shown, for example, in Figs. 2 and 3.

[0057] For example, the truck-mounted concrete pump 1 has a chassis device 20. The

[0058] Drive motor system 7 is in this case part of the chassis equipment 20. The

[0059] Chassis device 20 also has a vehicle frame 21, which

[0060] Drive motor system 7. In addition, the truck-mounted concrete pump 1 has a body 22, in particular a vehicle body. The concrete pump system 2 and the

[0061] The hydraulic drive pump system 3 is presently part of the body 22. The electric motor 5 is also presently part of the body 22. The vehicle frame 21 supports the body 22. The body 22 is arranged, for example, above the vehicle frame 21 and—alternatively or additionally—above the drive motor system 7. In particular, the body 22 is arranged substantially or entirely above the vehicle frame 21 and—alternatively or additionally—above the drive motor system 7. "Above" refers in this case to a direction of gravity G.

[0062] The drive motor system 7 is, for example, mechanically connected to the electric motor shaft 6. In the present case, the drive motor system 7 is mechanically connected to the electric motor shaft 6 by means of a cardan shaft 29 of the truck-mounted concrete pump 1. The truck-mounted concrete pump 1 can also have a further cardan shaft 30, which serves to drive the drive motor system 7 to the at least one drive axle 13.

[0063] In this case, the truck-mounted concrete pump 1 further comprises an electrical grid connection 23. The electrical grid connection 23 is electrically connected, for example, to the electric motor 5 and is designed for electrical connection to a construction site electrical grid connection. In this case, the electrical grid connection 23 is electrically connected to the electric motor 5 via a converter 24 of the truck-mounted concrete pump 1.

[0064] In this case, the truck-mounted concrete pump 1 has an already mentioned electrical energy storage device 25, which may have an accumulator 26. The electrical energy storage device 25 is electrically connected, for example, to the electric motor 5 and designed to deliver electrical power to the electric motor 5. In this case, the electrical energy storage device 25 is electrically connected to the electric motor 5 via the converter 24. The electrical energy storage device 25 is electrically connected to the electrical grid connection 23 and designed, for example, to receive electrical power from the electrical grid connection 23 when the electric motor 5 does not require said electrical power from the electrical grid connection 23.Depending on the operating state, the electrical energy storage device 25 can be charged with electrical energy from the electricity grid connection 23 or can release stored electrical energy to support the electric motor 5 supplied with electrical power from the electricity grid connection 23.

[0065] In the present case, a drive connection between the drive motor system 7 and the electric motor 5 is rigid, in particular inseparable. In alternative embodiments not shown, this drive connection can be detachable by means of a switchable coupling device.

[0066] In the present case, a drive connection between the electric motor shaft 6 and the hydraulic pump drive shaft 4 is rigid, in particular inseparable. In alternative embodiments not shown, this drive connection can be detachable by means of another switchable coupling device.

[0067] In the present case, a drive connection between the power take-off 11 and the electric motor shaft 6 is rigid, in particular inseparable. In alternative embodiments not shown, this drive connection can be detachable by means of an additional switchable coupling device. Said additional coupling device can be flange-mounted on the power take-off 11 or on the electric motor 5.

[0068] As an alternative to the drive connection of the drive motor system 7 and the hydraulic pump drive shaft 4 by means of the electric motor shaft 6 shown in Figs. 2 and 3, the drive motor system 7 can be drive-connected to the hydraulic pump drive shaft 4 by means of an angular gear 28 according to the example in Figs. 4 and 5. In particular, the angular gear 28 drive-connects the electric motor 5 to the hydraulic pump drive shaft 4 without the electric motor shaft 6 mechanically transmitting power between the drive motor system 7 and the hydraulic pump drive shaft 4.

[0069] For example, the electric motor 5 can be arranged in the axis of the hydraulic drive pumps 18, see Figs. 2 and 3. Alternatively, the axis of the electric motor 5 can be installed at an angle, in particular 90°, to the axis of the essentially horizontally installed hydraulic drive pumps, see Figs. 4 and 5. A further alternative, not shown in the figures, is also conceivable, according to which a train comprising the electric motor 5 and hydraulic drive pumps 18 is positioned vertically via an angular gear for drivingly connecting the train to the drive motor system, wherein the electric motor 5 and the hydraulic drive pumps 18 are arranged in series in the train. A further alternative, not shown in the figures, is also conceivable, according to which the electric motor 5 is oriented horizontally, in particular with regard to its axis, and the hydraulic drive pumps 18 are oriented vertically, in particular with regard to their axes.

[0070] Optionally, as already mentioned, a switchable coupling device can be installed at each of the transitions, in particular between the drive device 8 and / or the electric motor shaft 6 and / or the hydraulic drive pump shaft 4. In particular, the electric motor 5 can have a hollow shaft carrying the rotor 17, through which the electric motor shaft 6 extends. The electric motor shaft 6 can be switchably connected to the hollow shaft by means of a coupling device, so that when the coupling device is open, the electric motor shaft 6 can be driven exclusively by the drive device 8, without the hollow shaft and rotor 17 rotating.

Claims

Patent claims 1. Truck-mounted concrete pump (1), the truck-mounted concrete pump (1) comprising: a concrete pumping system (2), the concrete pumping system (2) being designed to pump concrete, a hydraulic drive pumping system (3), the hydraulic drive pumping system (3) being designed to drive the concrete pumping system (2) and having a hydraulic pump drive shaft (4), an electric motor (5), the electric motor (5) being designed to drive the hydraulic pump drive shaft (4) of the hydraulic drive pumping system (3) and having an electric motor shaft (6), and a drive motor system (7), the drive motor system (7) being designed to drive the electric motor shaft (6) in order to drive the hydraulic pump drive shaft (4) of the hydraulic drive pumping system (3) by means of the electric motor shaft (6).

2. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the drive motor system (7) has a drive device (8), in particular having an internal combustion engine (BKM), wherein the drive motor system (7) has a transfer case device (9) which is drive-connected, in particular directly, to the drive device (8), wherein the transfer case device (9) has a main output (10) for driving the truck-mounted concrete pump (1) and a power take-off (11) for driving the hydraulic pump drive shaft (4) of the hydraulic drive pump system (3), in particular wherein the drive motor system (7) has a travel drive transmission device (12) which is drive-connectable or drive-connected to the main output (10).

3. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the truck-mounted concrete pump (1) has at least one travel drive axle (13), wherein the drive motor system (7) is designed to drive the at least one travel drive axle (13), in particular wherein the transfer case device (9) is designed to be switchable such that the drive device (8) can be mechanically connected to the at least one travel drive axle (13) of the truck-mounted concrete pump (1) or to the electric motor shaft (6).

4. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the electric motor shaft (6) has a first shaft end (14) for a drive coupling of the electric motor shaft (6) to the drive motor system (7) and a second shaft end (15) for a drive coupling of the electric motor shaft (6) to the hydraulic pump drive shaft (4), wherein the first shaft end (14) and the second shaft end (15) are axially opposite one another.

5. Truck-mounted concrete pump (1) according to the preceding claim, wherein the first shaft end (14) and the second shaft end (15) are accessible opposite one another for drivingly coupling the electric motor shaft (6) to the drive motor system (7) and to the hydraulic pump drive shaft (4), in particular wherein the electric motor (5) has a stator (16) and a rotor (17) rotatable relative to the stator (16), in particular wherein the stator (16) and the rotor (17) are arranged in a nested manner and the electric motor shaft (6) is connected to the rotor (17) in a rotationally rigid manner.

6. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the electric motor shaft (6) is mechanically rigidly connected to the hydraulic pump drive shaft (4) of the hydraulic drive pump system (3); and / or wherein the electric motor shaft (6) is designed to be continuous, in particular for a through-drive from the drive motor system (7) to the hydraulic pump drive shaft (4).

7. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the hydraulic drive pump system (3) comprises a number of hydraulic drive pumps (18), in particular wherein the number of hydraulic drive pumps (18) can be driven by means of the hydraulic pump drive shaft (4).

8. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the electric motor (5) is a liquid-cooled synchronous drive motor (19).

9. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the truck-mounted concrete pump (1) comprises: a chassis device (20), wherein the chassis device (20) comprises the drive motor system (7) and a vehicle frame (21) carrying the drive motor system (7), and a body (22), wherein the body (22) comprises the concrete pumping system (2) and the hydraulic drive pumping system (3), wherein the vehicle frame (21) carries the body (22), in particular wherein the body (22), in particular substantially or completely, is arranged above the vehicle frame (21) and / or the drive motor system (7).

10. Truck-mounted concrete pump (1) according to the preceding claim, wherein the structure (22) comprises the electric motor (5).

11. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the drive motor system (7) is mechanically connected to the electric motor shaft (6), in particular by means of a cardan shaft (29) of the truck-mounted concrete pump (1).

12. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the truck-mounted concrete pump (1) has an electricity network connection (23), wherein the electricity network connection (23), in particular by a converter (24) of the truck-mounted concrete pump (1), is electrically connected to the electric motor (5) and is designed for electrical connection to an electrical construction site network connection.

13. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the truck-mounted concrete pump (1) has an electrical energy store (25), in particular with an accumulator (26), wherein the electrical energy store (25), in particular by a converter (24) of the truck-mounted concrete pump (1), is electrically connected to the electric motor (5) and is designed to deliver electrical power to the electric motor (5).

14. Truck-mounted concrete pump (1) according to the two preceding claims, wherein the electrical energy storage device (25) is electrically connected to the electricity grid connection (23) is connected in such a way that electrical power not required by the electric motor (5) can be absorbed from the electrical connection (23) by means of the electrical energy storage device (25), and wherein the electrical energy store (25) is designed to deliver electrical power when electrical power delivered by the electrical energy store (25) is used in addition to the electrical power from the Electricity grid connection (23) is required by the electric motor.

15. Truck-mounted concrete pump (1) according to one of the preceding claims, wherein the Truck-mounted concrete pump (1) comprising: a concrete placing boom (27), wherein the concrete placing boom (27) is designed to distribute conveyed concrete, wherein the hydraulic drive pump system (3) is designed to drive the concrete placing boom (27).

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