Disc brakes respond faster than drum brakes, and becaus […]
Disc brakes respond faster than drum brakes, and because the brake pads are exposed to air for better heat dissipation. However, the structure of the disc brake is more complicated, and the complicated structure means higher cost. Therefore, the disc brakes of the middle and high-grade vehicles are more, the structure of the drum brake is simpler and the cost is lower, and the braking force is It is much larger than the disc brake. Therefore, many bus trucks use drum brakes. However, drum brakes have a fatal disadvantage. The heat dissipation is not good. Long-term driving will cause deformation and cause a series of safety hazards.
Drivers who often run long downhill sections will add a sprinkler to the drum brakes. In general, disc brakes are not only cost and braking. Others are better than drum brakes, especially stability and heat dissipation. In addition, when the weather is bad and some road conditions are bad, the disc performance is better than the drum type. However, in large vehicles, disc brakes cannot replace Drum brake.
The heat dissipation advantages of disc brakes are obvious. Most brake discs are made of steel because they dissipate heat very quickly and have significant advantages in continuous braking, especially on downhill sections, which retain sufficient braking force after multiple brakes. Under the same conditions, the drum brakes will have severe thermal damping of the braking force, and will feel the brakes are weak and even have the danger of brake failure.
Drum brakes have been used in automobiles for nearly a century. In short, a drum brake is a brake that uses a static brake pad in a brake drum to rub the brake drum that rotates with the wheel to generate friction to reduce the rotational speed of the wheel. When the brake pedal is depressed, the force exerted by the foot will cause the piston in the master cylinder to push the brake oil forward and create pressure in the oil passage. The pressure is transmitted to the brake pump piston of each wheel through the brake oil. The piston of the brake pump pushes the brake pad outward, causing friction between the brake pad and the inner surface of the brake drum and generating sufficient friction. Reduce the speed of the wheel to achieve the purpose of braking.