Drum brake with cooling device

Abstract

The invention discloses a drum brake with a cooling device in the technical field of automobile part equipment, an air inlet hole is formed in the rear side wall of a drum brake body and connected with a cooling fan through an air guide pipe, a first water delivery pump is connected with a quantitative cylinder, a first electromagnetic water valve is arranged at a water outlet of the quantitative cylinder. The output end of the liquid level sensor is electrically connected with the single-chip microcomputer, a water inlet of the quantitative cylinder is connected with a second water delivery pump through a water delivery pipe, the second water delivery pump is connected with the water tank, a temperature detection element is arranged on the outer wall of a friction plate of the drum brake body, and the output end of the temperature detection element is electrically connected with the single-chip microcomputer. The drum brake is simple in structure and reasonable in design, on the premise that cooling of the brake is guaranteed, the spraying water amount is controlled, the problem that the heat dissipation effect is poor due to the fact that the added water amount is too large or too small is solved, water resources are saved, and the using effect is good.

Description

technical field [0001] The invention relates to the technical field of automobile parts and equipment, in particular to a drum brake with a cooling device. Background technique [0002] Drum brakes use the brake transmission mechanism to make the brake shoe press the brake friction plate against the inner side of the brake drum, thereby generating braking force, decelerating the wheel or stopping within the shortest distance as required to ensure driving safety, and Ensure that the car is parked reliably and cannot slide automatically. The existing drum brakes will have braking performance degradation and slight ablation of the brakes during continuous operation. The excessive temperature rise of the brake drum will lead to high thermal stress and decrease in braking strength. Condition. [0003] In the prior art, when cooling the high-temperature brakes, water is sprayed on the upper and outer sides of the brakes, but the amount of water sprayed cannot be controlled. Addin...

AI Technical Summary

Problems solved by technology

[0002] Drum brakes use the brake transmission mechanism to make the brake shoe press the brake friction plate against the inner side of the brake drum, thereby generating braking force, decelerating the wheel or stopping within the shortest distance as required to ensure driving safety, and Ensure that the car is parked reliably and cannot slide automatically. The existing drum brakes will have braking performance degradation and slight ablation of the brakes during continuous operation. The excessive temperature rise of the brake drum will lead to high thermal stress and decrease in braking strength. Happening

[0003] In the prior art, when cooling the high-temperature brakes, water is sprayed on the upper and outer sides of the brakes, but the amount of water sprayed cannot be controlled. Adding too much water will easily affect the performance of the brakes, and adding too little water will not achieve heat dissipation. effect, for this purpose, we propose a drum brake with a cooling device

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