| 摘要 |
<p>The basis for this invention represents the problem of how to provide the concept of a simple and accessory-free use of an easy controllable hydraulic lifting device, reliably operating under any weather conditions. It should be operated by a power source, for example standard car battery which is generally available in motor vehicles, particularly cars, each time to lift the car at least to a height which is necessary to replace tyres. The solution according to this invention includes the use of a hydraulic lifting device, particularly for motor vehicles, by which the lifting of the vehicle is made possible by using a standard car battery. The device includes a larger hydraulic cylinder (2) and a smaller hydraulic cylinder (73) connected via at least one reverse protection valve (72) and appropriate hydraulic connections (72, 73), and located within the chassis (1) taking into account the cross section area. The piston (20) rod (21) of the larger hydraulic cylinder (2) is equipped with a supporting adapter (23) reaching out of the chassis (1) area and movable by repumping the hydraulic liquid from the reservoir (4) into the larger cylinder (2) with the help of the piston (30) of the smaller cylinder (3). The piston (30) of the smaller hydraulic cylinder (3) is via the corresponding piston rod (31) firmly connected to the supporting adapter (33) which supports the swivelling rolling assembly (34) against the force of the spring (32), which is for flexibility reasons of the smaller hydraulic cylinder (3) piston (30) connected to the electromotor (6) via an each time corresponding transmitter (5).</p> |
