Variable pin pilot valve

Abstract

The invention provides a variable-foot pilot valve, pertaining to the field of mechanical technology. The invention is capable of settling the problems of existing variable-foot pilot valves such as poor flexibility, complex structure, difficult fabrication, etc. The variable-foot pilot valve comprises a valve body and a foot pedal arranged on the top of the valve body; the middle part of the foot pedal is hinged with the valve body; an oil inlet cavity and a oil return cavity which is communicated with the oil inlet cavity are arranged on the valve body; a piston rod component is arranged at both ends of the bottom of the foot pedal respectively; the piston rod component is set to correspond with oil holes, and capable of making the oil inlet cavity to communicate with or cut off from the oil holes; when one piston rod component is pressed by the foot pedal, the oil inlet cavity can be communicated with the oil outlet hole corresponding to the piston rod component; a quantity governing mechanism is arranged between the foot pedal and the piston rod component. The invention has the advantages of rational design, simple structure, high operation reliability, easy assembly, long service life, etc.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a variable 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 b...

AI Technical Summary

Problems solved by technology

[0003]The above scheme improves the working performance of the pilot valve to a certain extent, but there are still the following defects: 1. The output oil pressure cannot be adjusted according to the needs, applicable The flexibility is poor, it is difficult to meet the needs of different applications

2. The overall structure is relatively complicated, 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

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