Feet pilot valve

Abstract

The invention provides a foot pilot valve, which pertains to the technical field of machinery and solves the problems of complex structure, difficult manufacture and poor dust-proof property, etc. in the existing foot pilot valve. The foot pilot valve comprises a valve body and a foot board arranged on the top of the valve body, the middle of the foot board is articulated on the valve body, the valve body is opened with an oil inlet cavity and an oil return cavity which are communicated with the oil inlet cavity, the oil return cavity is communicated with an oil return hole opened on the valve body, two ends of the bottom of the foot board are respectively provided with a piston rod arranged in the valve body, a piston rod reset mechanism is arranged between the piston rod and the valve body, the piston rod and an oil outlet hole are arranged correspondingly and can lead the oil inlet cavity and the oil outlet hole to be communicated or cut off, the lower end of the piston rod is provided with a pressure output hole, which can lead the oil inlet cavity and the oil outlet hole corresponding to the piston rod to be communicated when the piston rod is pressed down by the foot board. The foot pilot valve has the advantages of discharging the sundries produced in the manufacturing procedure and good seal performance.

Description

technical field [0001] The invention relates to the field of mechanical technology, in particular to a foot pilot valve. Background technique [0002] Pilot valves are widely used in the hydraulic field. In order to improve their working performance and facilitate their production and processing, people have carried out long-term exploration and proposed various improvement schemes. For example, Chinese patent literature discloses a pilot valve [CN200320122465.1], which includes a valve body and a valve core, the valve body is an inseparable one; the valve core is a component type. The switch of the energized circuit of the electromagnetic coil that drives the movement of the spool is normally open. The invention adopts an integral aluminum alloy valve body structure, which is light in weight and has no leakage. Easy to install; the electromagnet circuit adopts the normally open switch form, and it is only energized when it is working, which prevents the coil from being da...

AI Technical Summary

Problems solved by technology

[0003] The above scheme has improved the working performance of the pilot valve to a certain extent, but still has the following defects: 1. The structural design for switching the oil circuit is not reasonable enough, which is prone to leakage and affects the working performance

2. The overall structure is relatively complex, and the manufacturing is difficult. The particles and sundries generated during the production process are difficult to get rid of, which will pollute the entire oil circuit and affect normal work.

3. Long-term work is easy to cause wear and tear, and there is no corresponding remedial structure for such wear and tear. Parts must be replaced to continue normal use, which increases the cost of use and causes waste of resources

4. The output oil pressure cannot be adjusted according to the needs, the flexibility of application is poor, and it is difficult to meet the needs of different applications

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