Product Specification

High Quality SINOTRUK HOWO Truck Parts Rear Lower Brake Shoes Assembly WG9231342072

Introduction to the rear lower brake shoe assembly WG9231342072

The rear lower brake shoe assembly WG9231342072 is a key component in the automotive braking system, especially in the rear wheel braking of the vehicle. It is mainly composed of multiple parts such as the brake shoe body, friction plate, return spring, etc. The brake shoe body is usually made of high-quality metal materials, with good strength and rigidity, and can withstand the strong pressure generated during braking. The friction plate attached to its surface is made of special friction material, with a high friction coefficient and good wear resistance, which can generate sufficient friction when in contact with the brake drum, thereby effectively achieving vehicle deceleration and parking. The function of the return spring is to help the brake shoe quickly return to its initial position after braking, ensuring the normal release of the braking system and the timeliness of the next braking. The various components of the rear lower brake shoe assembly WG9231342072 work closely together and work together. When the driver steps on the brake pedal, the brake fluid pressure pushes the brake wheel cylinder piston to expand the brake shoe outward, and the friction plate fits tightly with the inner wall of the brake drum to generate friction torque to prevent the wheel from turning. With its reliable performance, precise dimensional accuracy and excellent manufacturing process, this assembly provides stable and effective braking force for the vehicle's braking system, ensuring the safety and reliability of vehicle driving.

The working principle of the rear lower brake shoe assembly WG9231342072 of China HOWO trucks is as follows:

♦ Braking start stage: When the driver steps on the brake pedal, the engine-driven air compressor generates compressed air, which passes through a series of components such as the air reservoir and the master brake cylinder to convert the air pressure into mechanical thrust. In the rear wheel braking system of HOWO trucks, this mechanical thrust pushes the push rod of the brake cylinder to move the push rod forward.
♦ Brake shoe expansion stage: The movement of the push rod of the brake cylinder pushes the adjustment back, which in turn drives the cam to rotate. Because the cam is eccentric, its rotation will push the rear lower brake shoe assembly WG9231342072 outward, so that the friction plate of the brake shoe assembly fits tightly with the inner surface of the brake drum. During this process, the rear lower brake shoe assembly WG9231342072 is subjected to multiple forces such as the thrust of the actuator, the normal force and tangential force of the brake drum, and the supporting reaction force.
Brake friction stage: The friction torque generated between the friction plate and the brake drum will hinder the rotation of the brake drum, thereby slowing down the wheel. As the driver's pressure on the brake pedal increases, the pressure of the compressed air increases, the thrust of the brake cylinder on the brake shoe also increases, the friction torque between the friction plate and the brake drum further increases, and the braking force of the wheel is also increased accordingly until the vehicle stops.
♦ Brake release stage: When the driver releases the brake pedal, the air path between the air reservoir and the brake cylinder is disconnected, the compressed air in the brake cylinder is discharged, and the push rod returns to its original position under the action of the spring. Under the pulling force of the return spring, the rear lower brake shoe assembly WG9231342072 returns to its initial position, the gap between the brake shoe and the brake drum returns to normal, and the brake is released.