The drum brake consists of two parts: a brake frame and an electric hydraulic pusher. When braking, the wheel cylinder piston pushes the brake shoe outward under the action of the brake fluid pressure, and the brake shoe overcomes the elastic force of the return spring. Open, press against the brake drum, and generate braking torque to brake the car. The working principle of the drum brake is to push the piston of the brake master cylinder to move when the brake pedal is stepped on, and then generate pressure in the oil, make it open outward and press against the brake drum to generate braking torque. The components of drum brakes include brake wheel cylinders, brake shoes, brake drums, friction linings, return springs, etc. Drum brakes are in the car field. It has been gradually withdrawn and is mainly used to brake rear wheels and parking brakes with relatively small loads. The working principle of drum brakes also includes the effect of self-increasing or self-decreasing torque. The friction of the leading shoe is from 2 to 2.5 times

Brake Drum: An Essential Component for Vehicle Safety

The brake drum is a crucial part of a vehicle’s braking system, playing a vital role in ensuring safe and efficient stopping power.

Brake drums are typically made of cast iron or other durable materials. This construction provides the necessary strength and heat - handling capabilities. Cast iron, in particular, is favored due to its excellent heat dissipation properties. When the brakes are applied, a large amount of kinetic energy is converted into heat. The brake drum’s ability to absorb and dissipate this heat is fundamental for consistent braking performance.

One of the main features of a brake drum is its simplicity in design yet high - level functionality. It consists of a cylindrical drum - shaped component that houses the brake shoes. As the brake pedal is pressed, the brake shoes are forced against the inner surface of the brake drum. This frictional contact creates the necessary resistance to slow down and stop the vehicle.

Brake drums are known for their reliability. They are less likely to be affected by external factors such as dirt and debris compared to some other braking components. Their enclosed design helps protect the internal parts from environmental contaminants, which can prolong their service life.

In terms of maintenance, brake drums are relatively easy to service. Regular inspection for wear and tear, such as checking for any grooves or thinning of the drum wall, is important. If any signs of excessive wear are detected, resurfacing or replacement can be carried out.

Brake drums are also cost - effective. They are generally more affordable than some other advanced braking technologies, making them a popular choice for a wide range of vehicles, from economy cars to certain types of commercial vehicles. Their durability and long - lasting performance contribute to overall cost savings for vehicle owners over the life of the vehicle.