Energy storage type parking unit brake cylinder

Abstract

The invention discloses an energy storage type parking unit brake cylinder. The energy storage type parking unit brake cylinder comprises a unit brake cylinder and a parking brake cylinder, a brake piston comprises a piston body and a piston pipe, the piston body is matched with the inner wall of a brake cylinder block, one end of the brake cylinder block is fixedly connected with a middle body, a buffering spring is arranged between the middle body and the brake piston, and the periphery of the piston pipe is in sliding fit with the inner wall of a central pipe of the middle body. The piston pipe is composed of a regulating nut and a guide nut in a connected mode, a reset mechanism is composed of a screw, a yoke and the like, and the screw is connected with the regulating nut and the guide nut through non-self-locking nuts. The parking brake cylinder comprises a parking cylinder block, a parking piston, a parking regulating nut, a parking spring, a guide pin, a gear ring, a hand brake sleeve, a ball assembly, a pushing ring, a piston pipe cover and a manual-operation buffering device, wherein the parking cylinder block is provided with a second air inlet, and one end of the parking cylinder block is fixedly connected with the middle body. The energy storage type parking unit brake cylinder integrates the parking brake cylinder and the unit brake cylinder, and is compact in structure, small in size and convenient to install.

Description

[0001] technical field [0002] The invention relates to a braking device of a rail transit vehicle, in particular to a unit brake cylinder capable of realizing the parking brake function for the rail transit vehicle. Background technique [0003] Air brakes are now widely used in rail transit vehicles, and the brake cylinder is a device that transmits the air pressure of the vehicle's main air duct to the basic braking part, so that the vehicle can perform service braking from motion to rest. Due to the inevitable leakage of the air brake, it is impossible to keep the railway locomotive parked on the line or in the warehouse for a long time. Rail transit vehicles not only require a service braking function, but also a parking braking function. [0004] The parking brake of rail transit can be roughly divided into two categories according to the principle of action: 1. Hand brake: The hand brake is driven by rotating a manual control disc, driven by the sprocket chain, pull...

AI Technical Summary

Problems solved by technology

The existing energy-storage brake cylinders are all independent, and the disadvantage is that there must be an independent unit brake cylinder and an independent parking brake cylinder, so the volume is large and the installation is inconvenient

Moreover, the parking piston of the existing energy storage parking brake cylinder is directly installed on the hand brake sleeve through a non-self-locking thread, and the release pull pin must always be pulled out of the tooth groove of the hand brake sleeve during relief.

The release pull pin must also be pulled out when the parking cylinder is inflated after manual release, otherwise the parking cylinder cannot be inflated, and the parking piston cannot reach the correct position to compress the parking spring to store energy, thus losing its proper function

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