Bottom-groove single-cylinder flexible lifting mechanism of automobile body alignment machine

Abstract

The invention discloses a bottom-groove single-cylinder flexible lifting mechanism of an automobile body alignment machine. A center of a front cambered surface of a long circular groove hole of a first hinged support (2) is higher than that of a rear cambered surface of the long circular groove hole of the first hinged support (2); the center of the rear cambered surface of the long circular groove hole of the first hinged support (2) and a center of a circular hole of a second hinged support (8) are equal in height; and a distance between the center of the rear cambered surface of the long circular groove hole of the first hinged support (2) and the center of the circular hole of the second hinged support (8) is equal to that between centers of a front upper rotating shaft and a rear upper rotating shaft. The underfloor long circular groove hole is adopted, so that a leveling problem is solved; an overhead oil cylinder is arranged between a platform and a front supporting arm, so that a lifting moment is raised, and a cylinder diameter parameter is optimized; a ratchet protection device is improved; and a structure corresponding to the ratchet protection device is simplified.

Description

technical field [0001] The invention relates to a single-cylinder flexible lifting mechanism of an automobile body correction machine, in particular to a bottom groove single-cylinder flexible lifting mechanism of an automobile body correction machine. The bottom groove single-cylinder flexible lifting mechanism refers to a lifting mechanism that implements parallel lifting or tilting lifting through one oil cylinder, and the main feature to realize tilting lifting is the oblong slot hole arranged at the bottom. Background technique [0002] The lifting mechanism is one of the main functional parts of the car body correction machine. It is used to lift the working platform of the correction machine to make it rise and fall, so that the repair vehicle can enter the work platform and reach a suitable repair work height. [0003] The current relatively new single-cylinder flexible lifting mechanism is driven by a single oil cylinder and has two functions of parallel lifting or ...

AI Technical Summary

Problems solved by technology

This type of model has certain economical and practical advantages, but this technology still has the following problems: First, to realize the main features of inclined lifting - the oblong slot hole is placed on the top (on the platform), the lifting cylinder is placed at the bottom ( Installed on the underframe) (see the Chinese invention patent "A Single-cylinder Flexible Lifting Mechanism for Automobile Body Calibration Machine" with the publication number CN 102701109 A for details), the problem brought is: because the oblong slot hole is placed on the top, the platform When ascending on an incline, sometimes the front upper shaft of the front support arm will lift up the platform before reaching the back arc surface of the oblong slot hole to determine the parallel attitude of the platform. The inclination is roughly the same as the hydraulic direction of the oil cylinder. In the initial stage of parallel lifting of the platform, the front upper shaft of the front arm will retreat near the back arc of the long circular slot hole, resulting in slow or poor platform leveling. It is difficult to improve even with an additional parallel limit mechanism

Secondly, because the lifting cylinder is placed at the bottom, the thrust of the cylinder acts between the base hinge support and the front support arm, and the lifting torque is not good, especially at the low position, the initial thrust peak value is high, and it is necessary to increase the cylinder bore to lift the pressure to achieve

In the third aspect, there is also the lack of ratchet lock when the safety leg device is in the parallel state of the platform, and the lack of direct connection between the front and rear safety leg devices and the lifting action of the oil cylinder. more complex issues

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