Double-column hydraulic automobile elevator free of balancing of steel wire rope

Abstract

The invention particularly relates to a double-column hydraulic automobile elevator free of balancing of a steel wire rope. A main oil cylinder and an auxiliary oil cylinder are respectively arranged in stand columns on two sides of the double-column hydraulic automobile elevator, a rod cavity of the main oil cylinder is serially connected with a rodless cavity of the auxiliary oil cylinder via an oil pipe, and sectional area of the rod cavity of the main oil cylinder is equal to that of the rodless cavity of the auxiliary oil cylinder. According to the principle of isometric oil cylinder synchronization, the main oil cylinder and the auxiliary oil cylinder are set in at least four modes specifically including chain wheel mode, inverting mode, direct pushing mode and inverse pulling mode. The double-column hydraulic automobile elevator free of balancing of the steel wire rope has the advantage that support arms on the two sides can be kept to be lifted up synchronously so as to avoid various safety and maintenance problems caused by a steel wire rope synchronizing system utilized by the existing double-column hydraulic automobile elevator, and is simple in structure, low in cost, high in synchronizing stability, and few in required maintenance in a later period.

Description

technical field [0001] The invention relates to a car lift, in particular to a double-column hydraulic car lift without steel wire ropes for balancing. Background technique [0002] A car lift is a device used to support a certain part of the car chassis or body to lift the car. As a member of the car lift family, the hydraulic car lift has advantages unmatched by other lifts, such as its wide working range of structure, the ability to repair high-ceiling vehicles, and the open working space. [0003] In the existing double-column hydraulic car lift, lifting devices are usually installed in the left and right columns and connected by hydraulic hoses. One of its shortcomings is that there is a time difference between the left and right hydraulic cylinders when they start lifting. This will cause lifting imbalance due to the different lifting speeds on the left and right sides. For this reason, existing lifts have added a synchronous system of wire ropes on the basis of hydra...

AI Technical Summary

Problems solved by technology

[0003] In the existing double-column hydraulic car lift, lifting devices are usually installed in the left and right columns and connected by hydraulic hoses. One of its shortcomings is that there is a time difference between the left and right hydraulic cylinders when they start lifting. This will lead to lifting imbalance due to the different lifting speeds on the left and right sides. For this reason, the existing lift has added a wire rope synchronization system on the basis of the hydraulic lift.

The wire rope synchronization system has been widely used by similar lifts on the market, but the wire rope is easy to break and wear, and the parts in the system need a lot of maintenance. The riveting of the wire rope is easy to break, which can cause a sudden loss of pressure or Pressurization, so that the unbroken steel wire rope has to bear the danger of the full weight of the load and the impact force, and the hydraulic system is prone to overpressure hazards, causing bursts

The metal nature of the wire rope itself determines its ductility, so the wire rope is easy to extend. During use, it needs to be adjusted frequently, or a mechanical or electrical detection mechanism for the wire rope needs to be added, resulting in an increase in system cost.

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