TRUCK-MOUNTED CONCRETE PUMP

Abstract

The invention relates to a truck-mounted concrete pump having at least one travelling-drive motor and a hydraulic pumping device for delivering liquid concrete, wherein at least one electric motor is provided and the hydraulic pumping device can be driven either by the at least one travelling-drive motor or the at least one electric motor, characterized in that the travelling-drive motor is connected by way of a power take-off of a transfer gearbox of the travelling-drive train of the truck-mounted concrete pump to a branching gearbox, with a first gearbox input of the branching gearbox being coupled with the power take-off of the travelling-drive motor and a second gearbox input being coupled with the electric motor, and the gearbox output of the branching gearbox being connected to at least one hydraulic pump of the hydraulic pumping device.

Claims

1. A truck-mounted concrete pump having at least one travelling-drive motor and a hydraulic pumping device for delivering liquid concrete, wherein at least one electric motor is provided and the hydraulic pumping device can be driven selectively by the at least one travelling-drive motor or the at least one electric motor, wherein the travelling-drive motor is connected by way of a power take-off of a transfer gearbox of the travelling-drive train of the truck-mounted concrete pump to a branching gearbox, wherein a first gearbox input of the branching gearbox is coupled with the power take-off of the travelling-drive motor and a second gearbox input is coupled with the electric motor, and a gearbox output of the branching gearbox is connected to at least one hydraulic pump of the hydraulic pumping device.

2. The truck-mounted concrete pump according to claim 1, wherein the travelling-drive motor is an internal combustion engine.

3. The truck-mounted concrete pump according to claim 1, wherein the electric motor and the at least one hydraulic pump and/or the travelling-drive motor are each located on separate shafts, as a result of which a power transmission between the electric motor and the at least one hydraulic pump can be interrupted.

4. The truck-mounted concrete pump according to claim 1, wherein the power take-off of the transfer gearbox is an engine-dependent power take-off which is connected directly to a crankshaft of the travelling-drive motor.

5. The truck-mounted concrete pump according to claim 1, wherein the electric motor and the at least one hydraulic pump are located on the same side of the branching gearbox.

6. The truck-mounted concrete pump according to claim 1, wherein the electric motor and the at least one hydraulic pump are located on opposite sides of the branching gearbox.

7. The truck-mounted concrete pump according to claim 1, wherein the electric motor has an electrical output of at least 100 kW.

8. The truck-mounted concrete pump according to claim 1, wherein the at least one hydraulic pump is mechanically coupled either exclusively with the electric motor or exclusively with the travelling-drive motor.

9. The truck-mounted concrete pump according to claim 1, wherein the electric motor can be fed with electricity by way of a mains connection of the truck-mounted concrete pump.

10. The truck-mounted concrete pump according to claim 9, wherein the mains connection comprises one or more connection points for one or more parallel power supply lines, wherein the connection points are designed for identical or different continuous load values.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0019] Further advantages and properties of the invention will be discussed below with reference to an example of embodiment illustrated in the drawings, wherein:

[0020] FIG. 1 is a schematic side view of the truck-mounted concrete pump according to the invention, and

[0021] FIG. 2 is a detail view of the drive train for supplying the hydraulic pump device.

DETAILED DESCRIPTION

[0022] FIG. 1 shows schematically a side view of the truck-mounted concrete pump according to the invention, consisting of a commercial lorry chassis 1 with travelling-drive motor 11 for travel mode, and a superstructure 2, with the hydraulic pumping device, mounted thereon. The superstructure comprises substantially a distributor boom 3 and also the hydraulic pumping device with a plurality of hydraulic pumps 4. The hydraulic pumps 4 ensure, inter alia, the necessary hydraulic pressure for operating the pumping cylinder 5 and also for operating any secondary consumers or actuators for adjusting the distributor boom 3.

[0023] As can be inferred in particular from the detail representation in FIG. 2, the hydraulic pumps 4 are coupled jointly with the output B of a manual transfer gearbox 10. This manual transfer gearbox 10 comprises two inputs A, C in addition to the output B. Depending on the switching state of the manual transfer gearbox 10, either the mechanical power applied to the input A or the mechanical power applied to the input C can be switched through to the output B, optionally in conjunction with the necessary transmission ratio.

[0024] The first input A is connected by way of a shaft connection 13 to a power take-off of a transfer gearbox 12 of the travelling-drive train of the lorry chassis 1. Flange-mounted on the input of the transfer gearbox 12 there is a diesel generator set 11; the main output of the transfer gearbox 12 is coupled to the further travelling-drive train for the lorry chassis 1 or the truck-mounted concrete pump to travel on the road. Consequently, the diesel generator set 11 of the lorry chassis 1 serves primarily to implement the travel mode of the truck-mounted pump, but at least part of the mechanical power of the diesel generator set 11 can also be used by way of the power take-off of the transfer gearbox 12 for driving the hydraulic pumping device with the pumps 4.

[0025] By way of the input C, an electric motor 14 is coupled with the manual transfer gearbox 10. The concept of the truck-mounted concrete pump according to the invention consists in implementing the stationary pumping operation primarily electrically by way of the electric motor 14, and hence in an emission-free manner. The travelling drive of the truck-mounted concrete pump is diesel-powered as hitherto.

[0026] The necessary electric power for the electric motor 14 is tapped off from the construction site mains supply by way of a mains connection. In acknowledgement of the frequently-changing construction sites on which a truck-mounted concrete pump can be used, the connection to the construction site mains supply takes place by way of one or more pluggable connections or power supply lines. Using a plurality of pluggable lines to realize the maximum power makes it possible to adapt to weaker construction site mains supplies by using less connecting cable, but then with losses of performance.

[0027] Since the construction site mains supplies are currently not designed area-wide for high electrical power consumption, one skillful development of the truck-mounted concrete pump consists in carrying out the travelling drive in principle by diesel engine 11, but making driving of the hydraulic pump train 4 possible either by way of the diesel engine 11 or by way of the electric motor 14 additionally installed.

[0028] By means of the invention, a hybrid drive of the attachment unit 2 of the truck-mounted concrete pump is realized which makes fully-electric or diesel-electric driving of the pump hydraulic system possible. The structure according to the invention furthermore permits the use of a commercial lorry chassis 1, on which the attachment unit 2 consisting of the distributor boom 3, the pumping device with the pumps 4 and also the pumping cylinder 5 is placed. The extension of the attachment unit by the manual transfer gearbox 10 and the electric motor permits electric driving of the attachment unit in stationary, non-mobile operation by coupling to the public mains supply.

[0029] By attaching the manual transfer gearbox 10 to the power take-off of the lorry travelling-drive train, intervention in the travelling drive of the commercial lorry chassis 1 is not necessary.

[0030] The travelling drive of the truck-mounted concrete pump corresponds to the travelling drive of the commercial lorry chassis 1, and driving takes place by way of a torque-transmitting mechanical connection between the travelling-drive motor 11 and the drive axle or axles of the commercial lorry chassis 1, preferably by means of a cardan shaft.