Brake master cylinder

制动总泵

Abstract

本发明公开了一种制动总泵,其中,所述制动总泵包括缸体,所述缸体内可滑动地设有活塞杆装置,所述活塞杆装置包括顺次连接的第一活塞杆和第二活塞杆,所述第一活塞杆中远离所述第二活塞杆的一端通过复位弹簧连接所述缸体内壁,所述第二活塞杆中远离所述第一活塞杆的一端延伸至所述缸体外部,所述活塞杆装置还包括环形弹性膜,所述环形弹性膜套接在所述第一活塞杆上,且所述环形弹性膜的外圆边固定在所述缸体内壁。解决了传统的制动总泵,其活塞杆上套接的O型橡胶圈与总泵内壁的摩擦力较大,长时间摩擦后容易断裂的问题。
The invention discloses a brake master cylinder. The brake master cylinder comprises a cylinder body, a piston rod device is slidably arranged in the cylinder body and comprises a first piston rod and a second piston rod which are sequentially connected, the end, far away from the second piston rod, of the first piston rod is connected with the inner wall of the cylinder body through a return spring, the end, far away from the first piston rod, of the second piston rod extends out of the cylinder body, the piston rod device further comprises an annular elastic membrane, the first piston rod is sleeved with the annular elastic membrane, and the outer round edge of the annular elastic membrane is fixed to the inner wall of the cylinder body. By means of the brake master cylinder, the problems that in a traditional brake master cylinder, the friction force between an O-shaped rubber ring arranged on a piston rod in a sleeving mode and the inner wall of the master cylinder is large, and the O-shaped rubber ring is fractured easily after long time of friction are solved.

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