Electromagnetic brake of trailer

Abstract

The invention relates to an electromagnetic brake of a trailer, and belongs to automobile parts. The electromagnetic brake of the trailer comprises a bottom plate, two brake shoe assemblies which areoppositely arranged, a brake shoe return spring, an electromagnetic driver and a hand brake assembly which is used for parking braking; the two brake shoe assemblies are arranged on the bottom plate;one end of one brake shoe assembly is hinged to one end of the other brake shoe assembly; the two brake shoe assemblies are propped open to make contact with a brake drum for braking; the brake shoe return spring is used for driving the two brake shoe assemblies to get close to each other, and the two ends of the brake shoe return spring are connected with the two brake shoe assemblies; the electromagnetic driver is used for opening the two brake shoe assemblies and is hinged to the bottom plate; the output end of the hand brake assembly makes contact with or is separated from the two brake shoe assemblies; and the two brake shoe assemblies are driven by the hand brake assembly to be opened. According to the electromagnetic brake of the trailer, the brake can keep the braking function in the parking state, and emergency braking can be achieved.

Description

technical field [0001] The invention belongs to auto parts, in particular to an electromagnetic brake for a trailer. Background technique [0002] Electromagnetic brakes are widely used in the braking system of trailers. When braking is required, turn on the power supply of the electromagnet. After the electromagnet is energized, it becomes magnetic and is attracted to the end face of the brake drum. The rotating brake drum rotates around the pin shaft with the electromagnet and the brake lever. The top block spreads the brake shoe and presses it on the inner cylindrical surface of the brake drum to generate friction torque to decelerate the brake drum until it stops, thereby realizing braking. [0003] The current electromagnetic brakes do not have the functions of emergency braking and parking braking. Since the magnetic force of the electromagnet is basically unchanged after the electromagnet is energized, the braking torque generated by the electromagnetic brake is also...

AI Technical Summary

Problems solved by technology

[0003] The current electromagnetic brake does not have the functions of emergency braking and parking brake. Since the magnetic force of the electromagnet is basically unchanged after being energized, the braking torque generated by the electromagnetic brake is also basically unchanged. When the vehicle speed is high, the brake The distance is long, and emergency braking cannot be achieved

In addition, when the vehicle stops and the engine is turned off, the electromagnet loses its magnetism when it is powered off, and the brake is released, so the parking brake cannot be realized.

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