DE9204714U1 - Hydraulic set-down device for swap bodies - Google Patents

Description

The invention relates to a hydraulic lowering device for swap bodies, which is provided with telescopic support elements, a hydraulic pump and corresponding control devices for uniformly raising and lowering the body, whereby the support elements are designed to be foldable and have a lifting cylinder.

Demounting techniques for swap bodies are known in different designs.

One of these designs uses the vehicle's air suspension to raise and lower the body. Between the lifting and lowering processes, the support devices are folded out, which allows the body to be parked. The support devices are defined for a specific height and do not have a height adjustment in the remote position. Another design uses lifting arms or lifting scissors to raise the body. The support devices are folded out in the same way as described above. In this design, the support devices are not height-adjustable in the remote position, so that the loading and unloading height cannot be regulated.

Other designs use support devices for raising and lowering the structure, which are operated by external lifting cylinders, cable winches or threaded spindles. In these designs, only one support element can be operated at a time. This means that twisting of the structure cannot be ruled out. In addition, these techniques are very time-consuming and require a lot of handling.

The object of the invention is to create a hydraulic set-down device for swap bodies, in which the individual foldable and extendable support elements can be pressurized with pressure medium in a coordinated manner by control devices and can be adjusted in height, and have lifting cylinders.

The object is achieved according to the invention in that valves are arranged in the line network of the hydraulic system in such a way that the lifting cylinders can be pressurized with pressure medium either in pairs one after the other or all at the same time and evenly and that all support elements have an internal lifting cylinder.

The invention will be explained in more detail below using an embodiment.

The accompanying drawings show:

Fig. 1: a hydraulic pipe network with the arrangement of the flow control valves,

Fig. 2: the arrangement of the telescopic support elements on a removable frame and

Fig. 3: a support element with integrated lifting cylinder.

In the embodiment according to Fig. 1, a hydraulic line network is shown with the arrangement of the valves 1; 2; 3 of the so-called flow control valves. A pump 4, a switching valve 5 and the double-acting lifting cylinders 6; 7 and 8; 9 are also arranged in the hydraulic line network. Mode of operation: If pressure medium is delivered by the pump 4, in the embodiment a hand pump, then this can flow to the lifting cylinders 6; 7; 8; 9 according to switching position 15 of the switching valve 5. Valves 1, 2; 3 are interposed to regulate the volume flow. If valves 1; 2 are provided, then the lifting cylinders 6; 7 and 8; 9 are each regulated in pairs. If valve 3 is also used, then

all lifting cylinders 6; 7; 8; 9 can be regulated simultaneously. In the lowered state, the switching position 16 of the switching valve 5 enables the lowering of the body 12 due to its own weight. The pressure medium is fed back via the valves 1; 2; 3 and the switching valve 5 without activating the pump 4. If the body 12 is lowered from a vehicle, then the solution according to the invention allows the loading height to be regulated. This represents a significant advantage, especially if the body 12 can be brought to the desired height for loading or unloading. If the body 12 is lowered onto the vehicle, it is only lowered until the entire weight is taken up by the vehicle. The remaining stroke on the lifting cylinders 6; 7; 8; 9 is achieved by applying pressure medium using the pump 4 in the switching position. The arrangement of the pump 4 and the switching valve enables central operation with simple and low operating effort. Since the entire hydraulic system is installed on the body 12, there is no dependency on the equipment of the transport vehicle.

In Fig. 2 of the embodiment, the support elements IO are shown on the interchangeable frame 11 of a structure 12. The support elements 10 are folded out and secured by struts 13. The pump 4 and the entire line network of the hydraulic system (not shown) are also arranged on the interchangeable frame 11 in accordance with Fig. 1.

In Fig. 3, a support element 10 with an integrated lifting cylinder 6; 7; 8; 9 is shown schematically. A telescopic foot 14 is guided in the support element 10 and is connected to the lifting cylinder 6; 7; 8; 9. On the other hand, the lifting cylinder 6; 7; 8; rests against the upper part of the support element 10. To connect the lifting cylinder 6; 7; 8; 9 and the telescopic foot 14, connecting parts 17 are provided which can be mounted using slotted guides 13.

Reference symbols and technical definitions

1 Valve 2 Valve 3 Valve 4 pump 5 Switching valve 6 Lifting cylinder 7 Lifting cylinder 8th Lifting cylinder 9 Lifting cylinder 10 Support element 11 Removable frame 12 Construction 13 Striving 14 Telescopic foot 15 Switch position 16 Switch position 17 Connecting parts 18 Long hole guide

double-acting

Claims (1)

Claim for protection Hydraulic lowering device for swap bodies, which is provided with telescopic support elements of a hydraulic pump and corresponding control devices for raising and lowering the body, whereby the support elements are designed to be foldable and have a lifting cylinder, characterized in that valves (1; 2; 3) are arranged in the line network of the hydraulic system in such a way that the lifting cylinders (6; 7; 8; 9) can be pressurized with pressure medium either in pairs one after the other or all at the same time and that all support elements (10) have an internal lifting cylinder (6; 7; 8; 9). Here 3 sheets of drawings