Rotationally lubricating type sealing brake cylinder for railway vehicles

Abstract

The invention provides a rotationally lubricating type sealing brake cylinder for railway vehicles, which comprises a cylinder body and a front cover assembly, wherein a piston and a piston rod are arranged inside the cylinder body, a sealing ring and a lubricating sleeve are arranged on the outer wall of the piston, a release spring is arranged between the bottom of the piston and the front cover assembly, the piston rod sticks out of the front cover assembly, a guiding ring is fixed on the inner wall of the ring slot in the top of the piston, a guiding sleeve is arranged on the inner side of the guiding ring, a reset spring is arranged between the guiding sleeve and the ring slot of the top of the piston, and a guiding base is fixed at the bottom of the cylinder body; and the guiding ring and the guiding sleeve form a screw rotation mechanism, the guiding sleeve and the guiding base form a clutch mechanism, the reset spring and the release spring form a clutch control mechanism, so as to enable the piston to rotate in only one direction under the action of the three mechanisms, the lubricating grease deposited at the bottom of the cylinder body is brought to mid-upper part of the cylinder body, the grease is pasted on the inner wall of the cylinder body uniformly, uniform lubricating of the piston sealing ring is guaranteed, and harmful or leaking faults are avoided. The rotationally lubricating type sealing brake cylinder provided by the invention has a simple structure, is small in revamping workload, and does not affect the basic performance of the conventional braking device of the vehicle.

Description

technical field [0001] The invention relates to a railway vehicle brake cylinder, in particular to a railway vehicle rotary lubricating sealed brake cylinder. Background technique [0002] The principle of the railway vehicle braking system is to fill the brake cylinder with compressed air, push the piston rod of the brake cylinder outward, and change the air pressure into a mechanical thrust, thereby pushing the basic braking device of the vehicle to act, so that the brake shoe is pressed against the wheel. produce a braking effect. [0003] At present, the piston of the railway vehicle brake cylinder is pushed in a straight line during the brake release process, and the lubricating grease evenly applied to the inside of the cylinder body, the piston sealing ring and the lubricating sleeve during assembly will gradually deposit on the bottom of the cylinder body during operation , the lubrication condition between the upper part of the cylinder block and the piston becomes...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of grease cylinder bottom deposits in existing railway vehicle brake cylinders, and provide a simple and practical structure, stable and reliable performance, which can ensure uniform lubrication of the cylinder body and piston, and avoid dry wear and damage of the piston sealing ring. Rotary Lubricated Sealed Brake Cylinders for Railway Vehicles

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