Electro-hydraulic proportional control system and method of working device of loader

Abstract

The invention provides an electro-hydraulic proportional control system of a working device of a loader. The system comprises a controller, wherein the controller is connected with an electric control handle, a movable arm position sensor, a bucket position sensor and an electro-hydraulic proportional pilot valve block, and a movable arm oil cylinder and a bucket oil cylinder are connected with the electro-hydraulic proportional pilot valve block by a KM300-2 multiway valve. The invention further provides a control method of the electro-hydraulic proportional control system of the working device of the loader. The control method comprises the steps of controlling output of the electro-hydraulic proportional pilot valve block according to an electrical signal generated by the electric control handle and position feedback of the movable arm position sensor and the bucket position sensor, controlling a valve core of the KM300-2 multiway valve to move, further controlling the extension of the movable arm oil cylinder and the bucket oil cylinder, and therefore realizing the motion control of a movable arm and a bucket. The system overcomes defects in the prior art, improves the control performance of the loader, reduces the labor intensity of an operator, improves the precision of operation control, increases the production rate, and has the characteristics of simple layout, small occupied space and pipeline saving.

Description

Technical field [0001] The invention relates to an electro-hydraulic proportional control system and method of a loader working device, belonging to the technical field of loader intelligent control. Background technique [0002] The manipulation control of the working device of domestic loader is mainly controlled by the flexible shaft manipulation multi-way valve. This kind of manipulation method not only has great control force, high labor intensity, and low work efficiency. In recent years, manual hydraulic pilot-controlled multi-way valves have been used on a few loaders, which have many and long hydraulic lines, laborious operations, low efficiency, and low automation. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide an electro-hydraulic proportional control system and method for a loader working device that has low labor intensity for operators, high work efficiency, and pipeline savings. [0004] In order to solve t...

AI Technical Summary

Problems solved by technology

[0002] The operation and control of the domestic loader working device is mainly controlled by the flexible shaft to operate the multi-way valve. This operation method not only has a large operating force, but also has high labor intensity and low operating efficiency.

In recent years, manual hydraulic pilot control multi-way valves have been used on a small number of loaders. The hydraulic pipelines are many and long, and the operation is laborious, low in efficiency, and low in automation.

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