Self-return control oil cylinder with reversing function

Abstract

A self-return control oil cylinder with a reversing function comprises an oil cylinder body, a piston rod, a piston arranged on the piston rod, an electromagnetic reversing valve, an inner spring seat, an outer spring seat and a return spring, the electromagnetic reversing valve is installed on the oil cylinder body, and two oil ports of the electromagnetic reversing valve are connected with a left oil cavity and a right oil cavity of the oil cylinder body. The piston rod transversely penetrates through an inner hole of the oil cylinder body and penetrates out of the other side of the oil cylinder body, the penetrating-out end of the piston rod is connected with the inner spring seat, the outer spring seat is fixedly installed on the oil cylinder body through a connecting piece and wraps the inner spring seat, and the return spring is installed between the inner spring seat and the outer spring seat. The pre-tightening force of the return spring is loaded on the piston rod through the inner spring seat, and an adjusting mechanism used for adjusting the pre-tightening force of the return spring is further arranged. According to the scheme, the control oil cylinder can have three fixed control positions, and switching of the stretching-out state and the retracting state of the oil cylinder is achieved through the three-position four-way reversing valve under the condition that the oil inlet and outlet state of the oil cylinder is not changed.

Description

technical field [0001] The invention relates to the technical field of tractors, in particular to a self-returning control oil cylinder with a reversing function. Background technique [0002] Common operating cylinders for agricultural machinery can be divided into single-acting cylinders and double-acting cylinders according to their functions. The single-acting cylinder has only one movement direction (extension or retraction), which is an active action, that is, the action of the cylinder is realized by the action of the pressure oil, and the other movement direction is reset by an external load. The two movement directions (extending and retracting) of the double-acting cylinder are active actions, that is, whether the cylinder extends or retracts, it is realized by the action of the pressure oil. [0003] Single-acting oil cylinders are generally used to perform (manipulate) rod actions in a single direction, such as auxiliary clutches, transfer cases, and suspension ...

AI Technical Summary

Problems solved by technology

Such as shift control (forward, neutral, reverse), variable pump rocker control (positive displacement, neutral, negative displacement), etc., in the application scene of the control cylinder of this type of mechanism, the control cylinder with two states Can not meet the needs of use

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