Heavy type lorry transmission-gear box durable main air valve

A technology for heavy-duty trucks and main air valves, applied to components with teeth, transmission parts, fluid pressure actuators, etc. The air valve is easy to be damaged and other problems, so as to achieve the effect of easy processing and manufacturing
CN101240840AInactive Publication Date: 2008-08-13爱安特技术(常州)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
爱安特技术(常州)有限公司
Publication Date
2008-08-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a durable main air valve for heavy truck gear-box, relating to a shift main air valve of heavy truck gear-box. The aim of the invention is to resolve the problem of easy damage of the shift main air valve of the present heavy truck gear-box, not used for long period and difficult finish machining of the valve base sealing face, the main air valve cling to inner wall is fixedly assembled with a sliding bush, a rubber ring valve base component from left to right in orders, holes between the sliding bush and the rubber ring valve base from left to right are slidely assembled with a piston, a steel limit ring valve core, an aluminum reversing valve core and a spring in orders, wherein, the right of the piston and the left of the steel limit ring valve core are connected, the shaft drum external surface of the aluminum reversing valve core and the seal ring of the rubber ring valve base component form kinematical seal; the upper of the neutral gear bumper pin is inserted between the left baffle ring and the right baffle of the steel limit ring valve core, the right baffle ring sets multiple axial pylomes. The main air valve has a long using life, easy to process.
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Description

technical field

[0001] The invention relates to a shift main air valve of a heavy-duty truck gearbox. Background technique

[0002] Currently, if image 3 As shown, the shift main air valve of the gearbox of a heavy-duty truck adopts an aluminum one-piece valve core 24. There is a rubber ring 25 on the valve core 24 to form a flexible sealing surface, and the sealing surface of the valve seat is rigid. The shortcoming of mechanism and material is: because the spool 24 strength made of aluminum is low, so just very easy damage when the retaining ring groove 26 of spool 24 collides with steel limit pin 4, and damage accumulates to a certain degree, then occurs valve. When the safety control function of the valve core fails, when the valve core 24 moves, the air hole A, air hole B, and air hole P on the sealing surface of the valve seat will also damage the rubber ring 25 on the valve core, which limits the shifting of the main air valve. long-term use. And because the sealin...

Claims

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