Electro-hydraulic proportional control system and method of working device of loader
An electro-hydraulic proportional and working device technology, applied in mechanically driven excavators/dredgers, earthmovers/shovels, construction, etc., can solve the problems of low degree of automation, low operation efficiency, high labor intensity, etc. To achieve the effect of simple layout, small footprint, and reduced labor intensity
Inactive Publication Date: 2013-10-02
龙工(上海)机械制造有限公司
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[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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[0022] In order to make the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings.
[0023] figure 1 with figure 2 Respectively are the structural block diagram and principle diagram of an electro-hydraulic proportional control system of a loader working device provided by the present invention. The electro-hydraulic proportional control system of a loader working device includes a controller 6, an input terminal of the controller 6 and The electric control handle 7, the boom position sensor 4, and the bucket position sensor 5 are connected, and the output of the controller 6 is connected to the proportional pressure reducing solenoid valve 11 and the directional solenoid valve 12 on the electro-hydraulic proportional pilot valve block 3; double pump The oil outlet of an oil pump in 1 is connected to the input oil port of the electro-hydraulic proportional pilot valve block 3 through the pilot oil source block 2....
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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...
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IPC IPC(8): E02F3/36E02F3/42E02F9/22
Inventor 王孙濂刘永乾
Owner 龙工(上海)机械制造有限公司
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