Active release device

Abstract

The invention relates to an accessory of a railway vehicle, in particular to a release device of a braking system of a bogie of a railway truck. The braking system is provided with a basic braking device with slide grooves, sliders and bow braking beams. The release device comprises a spring mounting seat and an extension spring assembly, and is technically characterized in that one end of the spring mounting seat is a mounting end, and the other end of the spring mounting seat is a connecting end; and two connecting plates are respectively arranged at two ends of the extension spring assembly, one end of each connecting plate is connected with the spring mounting seat, a spring is mounted at the other end of each connecting plate, and the springs include an outer helical extension spring and an inner helical extension spring which are connected with each other in parallel to form the spring assembly. The release device has the advantages that the release device is simple and reliable in structure and convenient to install; the extension springs are stretched under the action of tension when the truck is braked; when the truck is released, the braking beams not only release braking due to the action of the gravity of the braking beams, but also are driven to move in pre-braking modes under rebounding actions of the extension springs, so that a brake shoe of the truck is separated from a wheel, and the braking beams can actively release braking.

Description

Technical field: [0001] The invention relates to a railway vehicle accessory, in particular to a relief device for a railway freight car bogie brake system equipped with a chute slide block type bow-shaped brake beam foundation brake device. Background technique: [0002] Poor brake relief and "brake" failure of railway freight cars are inertial mass problems that have plagued the use of railway freight cars for a long time. The railway freight car bogie, especially the railway freight car bogie equipped with the base brake device of the chute slider type bow brake beam, due to the limitation of the structure of the base brake device itself, the relief force mainly depends on the gravity of the brake device itself on the chute. It is often affected by various errors and the state of the friction surface. The relief force is not enough to overcome the resistance, resulting in the inability or incomplete separation of the brake shoe and the wheel, resulting in "locking brakes"...

AI Technical Summary

Problems solved by technology

The railway freight car bogie, especially the railway freight car bogie equipped with the chute slider type arch brake beam foundation brake device, due to the limitation of the structure of the foundation brake device itself, the relief force mainly depends on the gravity of the brake device itself on the chute. The component force of the direction is often affected by various errors and the state of the friction surface. The relief force is not enough to overcome the resistance, resulting in the inability or incomplete separation of the brake shoe and the wheel, resulting in "locking brakes" and poor brake relief failures. It will cause greater damage to the safety of railway traffic and become a risk source of hidden dangers for the safety of railway wagons

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