What are the components of the brake drum?
The scientific name of the brake hub is brake drum, which is called brake drum for short. It is the main component of the drum brake system. When braking, the inner surface of the brake drum rubs with the brake pad to brake. Its manufacturing material is generally gray iron with model HT250. In the case of improper use of vehicle parts by the driver or serious overload, it can cause fragmentation damage to the brake hub, and often cause personal injury in the process of high-speed driving.
Drum brake is composed of brake base plate, brake cylinder, brake shoe and other relevant connecting rods, springs, tip nails and brake drum. At present, it is only commonly used in the rear wheel. Drum brake has lower cost and higher absolute braking force, which is more used in the rear wheels of small cars. However, its wear rate is high, so the overall cost is high.
Drum brake is composed of brake oil pump, piston, brake pad and drum chamber. When braking, the piston is pushed by the high-pressure brake oil of the brake wheel cylinder to exert force on the two half moon shaped brake shoes to compress the inner wall of the drum and prevent the rotation of the brake drum by friction, so as to achieve the braking effect. Drum brake has excellent absolute braking force, simple structure and low cost. The configuration of front disc and rear drum is used in many large commercial vehicles. However, the heat dissipation performance of drum brake is poor, which is not suitable for continuous long-distance braking.
The methods to judge whether the drum brake needs to be replaced are as follows: 1. The brake is used frequently, and the drum brake should be replaced after the vehicle travels to 80000 km; 2. Use the brake infrequently, and consider replacing the drum brake after the vehicle can travel 100000 km; 3. If you hear a squeaking sound when using the brake, you should immediately go to the maintenance center to check the brake system and replace the drum brake. The working principle of drum brake is to use the static brake pad in the brake drum to rub the brake drum rotating with the wheel, so as to generate friction and reduce the rotation speed of the wheel. Its components are: brake base plate, brake wheel cylinder, brake shoe and other relevant connecting rods, springs, nails and brake drum.