The handbrake is an important component of a car.
Release time:
2025-12-02
The handbrake is an important component of a car, serving to help secure the vehicle. The rationality of its design directly affects the driving safety of the car. Prolonged use of the handbrake can cause plastic deformation in the steel cables, and this type of deformation is irreversible.
The handbrake is an essential component of a car, serving to help secure the vehicle. The rationality of its design directly affects the driving safety of the car. Prolonged use of the handbrake can cause plastic deformation in the steel cables. Since this type of deformation is irreversible, prolonged use will reduce the effectiveness of the handbrake and increase its travel distance. A return spring is also used in conjunction with the handbrake. When the handbrake is engaged, the spring is stretched; when the handbrake is released, the spring returns to its original length. With long-term use of the handbrake, the spring will also undergo corresponding deformation.
For small cars, the parking brake often features a brake disc located behind the transmission, connected to the drive shaft—in a configuration similar to that of disc brakes (though drum brakes are also used in some cases). The parking brake’s mechanical action is transmitted via steel cables, which pull on the brake disc to engage the parking brake. When you pull the parking-brake lever, a hydraulic auxiliary cylinder uses hydraulic pressure to push the main hydraulic cylinder located beneath the vehicle, which in turn actuates a pneumatic valve. (This design is employed specifically to prevent the driver’s cab from being disturbed by the noise of air flow.) Once the pneumatic valve is activated, it applies braking force to the drive shaft. In conventional trucks, the parking brake lever’s steel cable directly pulls on the drive shaft to achieve long-term braking. However, for higher-end trucks—such as Volvos—the system employs electronic control: when you pull the parking-brake lever, an electric motor-driven mechanism actually gets activated. After the air brake has been fully applied, this electric motor retracts and locks the steel cable. Of course, there are also models where the brake itself is directly pulled manually.
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No. 1, Deren Road, Dayang Subdistrict, Linhai City, Taizhou City, Zhejiang Province (Deren Industrial Park)
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