Which is better for drum brakes and disc brakes
Which of the drum brakes and disc brakes is better? I believe most people will say that the latter is good. This seems undoubted, but in some specific cases, drum brakes have their own advantages. Let's take a look at the advantages of drum brakes and disc brakes.
Drum brake
A general drum brake is composed of a rotating portion, a fixed portion, an actuating portion, and a positioning adjustment device. It consists of brake base plate, brake sub-pump, brake shoe and other related connecting rods, springs, tip nails and brake drums. Currently only used in the rear wheel.
The drum brake has a cast iron piece shaped like a tambourine, called a brake drum, which is fixed to the tire and rotates at the same speed. Drum brakes have lower cost and higher absolute braking force and are used more in the rear wheels of small cars. However, its wear rate is high, so the overall cost is high.
Disc brake
The disc brakes, the brake pads on the calipers, and the brake discs linked to the wheels interact during braking until the wheels stop rotating. Divided into disc type, ventilated disc type. Disc, ventilated disc, friction plate.
The disc brake uses a stationary brake disc to clamp the brake disc that rotates with the tire to generate friction, and the brake device that reduces the rotational speed of the wheel. When the brake pedal is depressed, the piston in the master cylinder is pushed and pressure builds up in the brake circuit. The pressure is transmitted to the piston of the brake cylinder on the brake caliper via the brake oil. After the piston of the brake cylinder is under pressure, it will move outward and push the brake block to clamp the brake disc, causing the brake block and the brake disc to rub. In order to reduce the wheel speed, let the car slow down or stop.
Drum brake advantages:
1. It has the function of automatic braking, so that the brake system can use lower oil pressure or use a brake drum that is much smaller in diameter than the brake disc.
2. The installation of the hand brake mechanism is easy. In some models with rear wheel brakes, the brake mechanism of the drum brakes is installed in the center of the brake disc.
3. The processing and composition of the parts are relatively simple, and the manufacturing cost is relatively low.
Advantages of disc brakes
1. The heat dissipation of the disc brake is better than that of the drum brake. When the brake is continuously stepped on, the brake will not be degraded and the brake will be disabled.
2. The change of the size of the brake disc after being heated does not increase the stroke of the brake pedal;
3, the disc brake system has a fast response, can do high-frequency brake action, and thus more in line with the needs of the ABS system;
4, the disc brake does not have the automatic brake function of the drum brake, so the brake force of the left and right wheels is relatively average;
5. Because the brake disc has better drainage, it can reduce the brakes caused by water or sediment;
6. Compared with the drum brake, the disc brake has a simple structure and is easy to maintain.
The above is about the introduction of drum brakes and disc brakes. I hope everyone can understand the advantages of drum brakes and disc brakes.