Entirety type electric and manual hydraulic lifter for overturning driving cab

Abstract

The electrically driven and hand driven hydraulic lifting machine for turning integral cab belongs to the field of automotive technology. The electrically driven and hand driven hydraulic lifting machine includes electric pump, hand pump and its operating mechanism, change valve and its operating mechanism, non-return valve for hand pump, one-way throttle valve, hydraulically controlled non-return valve, servo mechanism, unlocking oil cylinder, sealing member and control oil path mounted integrally inside one housing; lifting oil cylinder, piston and relevant parts integrated and mounted on the housing; and motor for the electric pump on the housing. The electrically driven and hand driven hydraulic lifting machine has reliable operation, wide application range, great lifting force and other advantages.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and specifically relates to electric and manual hydraulic lifts for turning over integral cabs with five structural forms, and the international patent classification number is B62D33 / 067. Background technique [0002] The existing cab overturning device mainly has the following three forms at present, one is the torsion spring type, a torsion spring is installed on the front axle of the cab, and a pre-torsion is given to reduce the gravity of the cab; the second is One is to adopt a screw structure; the third is to use a hydraulic mechanism manually or electrically; the above three methods all have different defects. The first and second types of overturning cabs are labor-intensive and unsafe for the driver; the third type has a split cab overturner. The oil pump and hydraulic cylinder of the overturner are separated into two parts, and the middle is connected by an oil pipe. 1. The oil pi...

AI Technical Summary

Problems solved by technology

The first and second types of overturning cabs are labor-intensive and unsafe for the driver; the third type has a split cab overturner. The oil pump and hydraulic cylinder of the overturner are separated into two parts, and the middle is connected by an oil pipe. , the oil pipe is easily worn during use, causing oil leakage in the system, which makes the turner work invalid, and secondly, the poor sealing of the pipe joint causes oil leakage, and the assembly process is poor

On December 21, 2005, the Chinese patent disclosed that the patent number is: 200510016856.9, and the name is: electric / manual lifting device for cab turning. This patent is an electric and manual integration, which overcomes the above-mentioned shortcomings. Although it is more convenient and applicable, However, 1. The whole device cannot be lifted horizontally (because of the self-weight check valve)

2. The lifting force is limited by the diameter and number (two) of the sliding plungers of the plunger pump (because the electric pump adopts a split structure), so it is difficult to increase the lifting force

3. The horizontal volume of the main body is too long, and the number of valve holes is too large, which makes the manufacturing process cumbersome and the production cost is relatively high.

4. Due to the external installation of the manual pump device system and the body, it is easy to cause thread loosening during actual use, making the operation of the manual pump device invalid

5. Since the manual pump device uses the up and down swing method to inject high-pressure oil into the system, but in the actual loading and use, the up and down swing method has no layout space, so it brings difficulties to the layout and operation of the whole vehicle

7. The manufacturing cost of arranging the follow-up device inside the piston rod is higher than that inside the lifting body

8. Only short-distance manual operation can be realized, but long-distance manual operation and long-distance button electric control and remote control cannot be realized.

Images