Drum brake cooling device based on temperature control shape memory alloy springs

Abstract

The invention relates to a drum brake cooling device based on temperature control shape memory alloy springs, and belongs to the field of cooling systems. The drum brake cooling device comprises control valves, a high-pressure water pipe, cooling liquid, a brake piston, braking liquid, a brake pump, a reset spring, a hub, guide rails, a brake shoe, a cooling sprinkler, a rest pin and the temperature control shape memory alloy springs. According to the drum brake cooling device, the brake shoe and the temperature control shape memory alloy springs are connected, and mutual heat transfer is achieved. When the brake pump works, the hub and the brake shoe rub to generate a large amount of heat, the temperature of the brake shoe rises, and the temperature of the temperature control shape memoryalloy springs also rises accordingly. According to the memory effect of a memory alloy, the symmetrically arranged temperature control shape memory alloy springs act, the corresponding control valvesare opened, and the sprinkler conveys the cooling liquid to cool a braking system. When the temperature of the brake shoe and the temperature of the temperature control shape memory alloy springs arereduced to certain temperature, the springs are restored to the original shape according to the memory effect of an memory alloy, the control valves are closed, the sprinkler stops conveying the cooling liquid, and the actions are repeated according to the temperature of a braking device. According to the drum brake cooling device, the work stability and running safety of the drum type braking device are improved to a certain degree, the service life of the drum type braking device is prolonged to a certain degree, and certain research value is achieved.

Description

technical field [0001] The invention relates to a drum brake cooling device based on a temperature-controlled shape memory alloy spring, which belongs to the field of cooling systems. Background technique [0002] With the continuous improvement of living standards, the use of family cars and engineering vehicles is becoming more and more common in daily travel and industrial production processes, followed by car maintenance issues becoming a hot spot of concern. Regardless of whether it is a small family car, a large passenger car or a truck, the most important thing in the maintenance process is the brake system, because the quality of the brake system will directly affect the driving safety of the vehicle. At present, the main bottleneck of the working stability of the vehicle's braking system is that when the vehicle is in the braking state for a long time, the brake shoes will soften due to friction and heat, resulting in a sharp drop in braking force. Therefore, an eff...

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Problems solved by technology

At present, the main bottleneck of the working stability of the vehicle's braking system is that when the vehicle is in the braking state for a long time, the brake shoes will soften due to friction and heat, resulting in a sharp drop in braking force. Therefore, an efficient, stable and durable Advanced brake cooling device has become an important way to improve vehicle driving safety

At present, the brake cooling devices in the domestic and foreign markets have disadvantages such as complex structure, poor working stability and short life, and the development of efficient and stable brake cooling devices has become an urgent need in the automotive field.

[0003] After searching the existing technical literature, it is found that the cooling device mentioned in the patent "A Brake Cooling Device for Automobiles" written by Liao Lifen from Jiaxing Vocational and Technical College has the function of cooling the brake system, but the parts that make up the cooling device Complicated, requiring people to operate the control switch to cool the brake device, there are disadvantages such as poor working stability and non-automatic cooling

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