Automobile brake master cylinder

Abstract

The invention relates to an automobile brake master cylinder which comprises a cylinder body, a retainer ring for a hole, a rear piston assembly, a front piston assembly, an oil cup, a fastening screw, an oil inlet seal ring and an oil outlet device. Two sides of the lower portion of the oil cup are in sealing connection with the cylinder body through the oil inlet seal ring, the rear piston assembly and the front piston assembly are located inside the cylinder body, one end of the rear piston assembly is connected with the front piston assembly, the rear piston assembly is positioned at the end of the cylinder body through the retainer ring for the hole, the oil cup is communicated with two positions inside the cylinder body, one position is located above the front piston assembly, the other position is located above the rear piston assembly, and the oil outlet device is communicated with the left end of the cylinder body. The automobile brake master cylinder has the advantages of being good in braking performance, reasonable in structural design, low in manufacture cost and the like and is rapid in braking response, hydraulic oil is prevented from flowing into the master cylinder from a wheel cylinder through structural improvement of the oil outlet device during brake stopping, accordingly the braking effect is ensured, and brake failure caused by overlarge pressure release amplitude in the wheel cylinder is effectively prevented.

Description

technical field [0001] The invention relates to an automobile brake system, in particular to an automobile brake master cylinder. Background technique [0002] The basic structure of a general braking system is mainly composed of wheel brakes and hydraulic transmission mechanisms. The wheel brake is mainly composed of a rotating part, a fixed part and an adjusting mechanism. The rotating part is a brake drum; the fixed part includes a brake shoe and a brake bottom plate; the adjusting mechanism is composed of an eccentric support pin and an adjusting cam to adjust the shoe-drum clearance. The brake transmission mechanism is mainly composed of a brake pedal, a push rod, a brake master cylinder, a brake wheel cylinder and pipelines. [0003] The general working principle of the braking system is to use the mutual friction between the non-rotating elements connected to the vehicle body (or frame) and the rotating elements connected to the wheels (or drive shaft) to stop the ro...

AI Technical Summary

Problems solved by technology

[0010] For example, the Chinese patent application number is ZL200620106848.3, which proposes an automobile brake master cylinder assembly, including a cylinder body, a front piston assembly, a rear piston assembly and an oil cup assembly, and the front piston assembly and the rear piston assembly are set In the cylinder body, the oil cup assembly is connected to the cylinder body through the oil inlet on the cylinder body. The rear piston assembly includes the rear piston and the limit screw. The rear piston and the limit screw are connected by riveting. The rear piston and the limit screw are connected by three-point riveting, which is more firmly fixed and will not loosen the connection, ensuring the normal connection between the front piston and the rear piston, and the braking force can be stably transmitted from the rear piston to the front piston, realizing the automobile system. This greatly improves the driving safety. The cross-section of the center valve stem adopts a triangular shape, which can be well matched with the center valve, and the installation is easy to put in place without falling out; however, the structural design of the oil inlet part of this application is relatively simple. Failure to ensure good sealing performance and oil supply performance, so as to affect braking performance

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