Continuous sensor for detecting drum brake friction plates and drum brake

Abstract

The invention relates to a continuous sensor for detecting drum brake friction plates and a drum brake, and belongs to the technical field of automobile drum brake detection. The continuous sensor comprises a sensor body, a sliding resistor and a flexible pulling part; the sensor body comprises a sensor housing and a sensor sliding core, wherein the sensor sliding core is located in the sensor housing and is in sliding connection with the sensor housing; the sliding resistor is located between the sensor housing and the sensor sliding core, and the resistance value of the sliding resistor is changed through relative sliding of the sensor housing and the sensor sliding core; and the flexible pulling part is connected with the sensor sliding core, and the flexible pulling part is used for pulling the sensor sliding core, so that the sensor sliding core linearly moves in the sensor housing. According to the continuous sensor, brake shoes and the sensor sliding core are connected through the flexible pulling part, the sliding resistor can continuously monitor the abrasion degree of the friction plates, and when the brake shoes retract, the flexible pulling part can guarantee that the resistance value of the sliding resistor is not changed, and the adverse effect of vibration on the continuous sensor and signals can be eliminated.

Description

technical field [0001] The application relates to the technical field of detection of automobile drum brakes, in particular to a continuous sensor for detecting drum brake friction plates and a drum brake. Background technique [0002] With the advancement of automobile technology and the improvement of users' requirements for maintenance convenience, as well as the requirements of laws and regulations for friction pad wear alarms, drum brake friction pad wear alarm devices are used more and more in automobiles. [0003] The braking of the vehicle is mainly achieved by the friction between the brake friction plate and its counterpart (brake drum or brake disc), and the brake friction plate will continue to wear during the braking process. Friction discs are generally made of non-metallic materials, and are fixed on brake shoes (or back plates) made of metal materials by means of riveting, sticking, bolting or sintering. When the friction plate wears to the limit, if it is n...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a continuous sensor and a drum brake for detecting the friction plate of the drum brake, so as to solve the problem in the related art that the sensor detects the residual signal of the friction plate inaccurately, which leads to the decrease or loss of the braking function of the brake

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