Bi-directional mechanical relieving labor-saving mechanism for parking brake of railway vehicles

Abstract

The invention provides a bi-directional mechanical relieving labor-saving mechanism for parking brake of railway vehicles. One end of a mounting plate is connected with a supporting plate and a travel switch, and a handle fixation clamp is arranged in the middle of the mounting plate. One end of a rotating shaft penetrates through the handle fixation clamp and is rotatably matched with the handle fixation clamp, and the other end of the rotating shaft is installed on the supporting plate. A sleeve is arranged on the rotating shaft, two long circular holes are formed in the surface of the sleeve, and two through circular holes are formed in the rotating shaft. Transmission pins are inserted into the circular holes in the rotating shaft and then penetrate through the long circular holes of the sleeve. A large force arm is fixedly connected with one end of the sleeve, and a small force arm is fixedly connected with the other end of the sleeve. A trigger point of the travel switch is installed on the sleeve and corresponds to a contact of the travel switch. The upper half portion of a push-pull steel cable is clamped on the supporting plate through two back nuts, and the lower portion of the push-pull steel cable penetrates through a long circular hole in the large force arm. The mounting plate is used for mounting the whole relieving mechanism and a brake cylinder. According to a relieving structure, both relieving operation on the vehicles and relieving operation under the vehicles can be triggered, and a parking brake mechanical relieving state can be conveniently checked; meanwhile, mechanical relieving tensile force for parking brake is greatly lowered, the operation time is greatly shortened for drivers and maintainers, and labor intensity of the drivers and the maintainers is greatly relieved; and the bi-directional mechanical relieving labor-saving mechanism for parking brake of the railway vehicles is simple in structure, convenient to use and good in reliability.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle parking brake relief, and in particular relates to a parking brake bidirectional mechanical relief and labor-saving mechanism. Background technique [0002] In order to ensure the parking braking force requirements of rail vehicles on ramps or garages, the foundation braking device of rail vehicles is usually equipped with a parking brake device, which is usually applied by spring force and released by air. In order to ensure that the rail vehicle can release the parking brake without compressed air, the foundation brake device is usually equipped with a manual release device to relieve the spring parking brake force generated by the parking brake device. The manual release ring of the parking brake device is located near the wheel. When the parking brake force needs to be released, the release ring of the parking brake cylinder is connected through an ordinary steel wire rope. The end of the...

AI Technical Summary

Problems solved by technology

[0003] What the present invention aims to solve is that the parking brake relief force is too large, the operating position is inconvenient, and there are potential safety hazards

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