| 摘要 |
The device for tilting and locking the driver's cab of lorries has a hydraulic tilting cylinder 1 in whose one feed line 6 which starts from the pump and is guided via a distributing regulator 9, there is provided, in addition to at least one hydraulically releasable non-return valve, a hydraulic cylinder which moves the locking element 23 with its piston. In the feed line 6 or the return line 15, a shut-off valve 14 is connected which is controlled by means of a control device 41 which is attached to the motor vehicle in such a way that, when the control device 41 is switched on, the shut-off valve 40 blocks the feed line 6 or the return line 15, as a result of which a circulation in the feed line/return line of the tilting cylinder can now no longer take place despite the pump being actuated. This has the advantage that, in order to prevent unauthorised actuation, the pump does not have to be attached to the motor vehicle at constructionally unsuitable points. <IMAGE>
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