Piston clutch master cylinder

Abstract

A plunger-type clutch master cylinder comprises a pump body, a spring assembly, a plunger, main leather rings and secondary leather rings, wherein the spring assembly is arranged on the bottom end in a cylinder hole of the pump body, the plunger is arranged at the external end of the cylinder hole of the pump body, the main leather rings and the secondary leather rings are arranged in a leather ring groove of the cylinder hole of the pump body, and the the inner wall of the cylinder hole of the pump body comprises an oil passing groove. The plunger-type clutch master cylinder are mainly used for a clutch system of a car, other minitype passenger vehicles and a commercial vehicle, and as popularizeing the requirement of vehicle lightweight design in recent years, the plunger-type clutch master cylinder is used in a wide range day by day. Compared with a clutch master cylinder with a normal structure, under the premise that the equal output volume and the journey are met, the plunger-type clutch master cylinder is shorter in the axial direction length, the installation space requirement is less, and the element structure is more simple, more compact, and higher in overall performance. In addition, a reciprocating motion sealing surface is an outer circle of the plunger of the pump body, and the key parameters such as processing the geometric accuracy and the roughness of the outer circle of the plunger are easier to be guaranteed, so that the working performance and the service life of products are prolonged.

Description

technical field [0001] The invention relates to a clutch master cylinder, in particular to a plunger type clutch master cylinder with a helical groove in a cylinder hole of a pump body. Background technique [0002] The clutch master cylinder is a component in the friction clutch hydraulic control mechanism of the automobile. It is connected with the clutch pedal in the cab. When the driver depresses the clutch pedal, the master cylinder piston moves axially, and the volume of the working chamber in the pump decreases to increase the hydraulic pressure. The hydraulic pressure is transmitted to the slave cylinder through the brake oil pipe connected to the pump, and the hydraulic pressure pushes the piston to move axially in the working chamber of the slave cylinder, so that the release fork moves, the release bearing pushes the inner ring of the diaphragm spring to move forward, and the outer end of the diaphragm spring pulls the pressure The disc moves backwards to release ...

AI Technical Summary

Problems solved by technology

[0003] The utility model patent with the application number 200320103293.3 discloses a plunger type hydraulic brake clutch master cylinder, a hydraulic oil chamber is installed above the pump body, an oil inlet is arranged above the hydraulic oil chamber, and a check valve is installed between the oil chamber and the valve body One end of the plunger-type valve stem installed in the valve body is connected to the pedal, and the other end is connected to the oil outlet through a valve stem return device. This pump can avoid accidents caused by brake fluid leakage, insufficient hydraulic oil, and brake failure, etc. problem, but the friction between the pump body and the plunger is relatively large, and unilateral wear is prone to occur

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