Novel hydraulic gear-shifting pressure regulating valve

Abstract

A novel hydraulic gear-shifting pressure regulating valve mainly comprises a body, a valve core of a pressure control valve, a plunger of an energy accumulator, a main spring of the energy accumulator, an auxiliary spring of the energy accumulator, a throttling hole, a spring of a pressure setting valve, a valve core of the pressure setting valve, a fast oil charge valve core, and a fast oil charge hole. The valve core of the pressure control valve is arranged in the body of the hydraulic gear-shifting pressure regulating valve, the fast oil charge valve core is arranged inside the valve core of the pressure control valve, the left end of the auxiliary spring of the energy accumulator and the right end of the fast oil charge valve core are acted mutually, the right end of the auxiliary spring of the energy accumulator and the plunger of the energy accumulator are acted mutually, the left end of the main spring of the energy accumulator and the valve core of the pressure control valve are acted mutually, the right end of the main spring of the energy accumulator and the plunger of the energy accumulator are acted mutually, and an oil seal cavity is formed by partial inner surface of the valve core of the pressure control valve and the fast oil charge valve core, and is communicated with the space outside the valve core of the pressure control valve through the fast oil charge hole on the valve core of the pressure control valve. At the gear-shifting clutch fast oil charge stage, the novel hydraulic gear-shifting pressure regulating valve can always keep the larger opening degree of an adjustable valve port of the valve core of the pressure control valve, enable hydraulic oil to be charged into a gear-shifting clutch oil cylinder at a speed higher than that of the traditional hydraulic gear-shifting pressure regulating valve, thereby shortening the gear-shifting time.

Description

technical field [0001] The invention relates to a novel hydraulic shifting pressure regulating valve, in particular to a hydraulic shifting pressure regulating valve which can effectively shorten the shifting time of large construction machinery and heavy trucks. Background technique [0002] With the continuous development and maturity of construction machinery and heavy trucks in my country, people have higher and higher requirements for shift quality, and the application of power shift gearboxes in domestic construction machinery and heavy trucks is becoming more and more popular. The important characteristics of the power shift transmission are the smoothness and quickness of the shift, which is mainly guaranteed by the combination of the hydraulic shift pressure regulating valve to control the shift clutch. [0003] The clutch hydraulic oil cylinder needs to go through three stages in the whole combination process of the shifting clutch: the rapid oil filling stage, the...

AI Technical Summary

Problems solved by technology

With the hydraulic shift pressure regulating valve of this structure, the shift clutch oil cylinder is quickly filled with oil at the initial stage of shifting. When the hydraulic oil overcomes the pre-pressure of the shift clutch release spring and eliminates the gap between the friction plates, the pressure control valve spool The oil pressure at the oil outlet rises and acts directly on the left end of the pressure control valve spool, causing the pressure control valve spool to move to the right, resulting in that the pressure control valve spool will The opening of the adjustable valve port 2 is reduced, and the oil cannot be filled into the shift clutch oil cylinder at the fastest speed, which eventually leads to the prolongation of the oil filling process of the shift clutch and the increase of shift time

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