For the two terms of drum brake and disc brake, it is n […]
For the two terms of drum brake and disc brake, it is not unfamiliar to everyone, but trace the source, what is the difference between them, where are their respective advantages? Today, Xiaobian will help you analyze it.
Disc brakes and drum brakes, the debate on the effectiveness Auto accessories of brakes has a long history. Many people say that the main performance of the disc brakes is better than the traditional drum brakes. In fact, this is not absolute and needs to be treated rationally.
In 1916, the Americans invented the drum brake, which relied on the brake shoes mounted on the axle to cooperate with the wheel brake drum to complete the braking action. This kind of brake has higher braking force than the bicycle brakes used in the early stage (including tire type, rim type, pulley type, holding type, etc.), and the braking is more stable and more reliable. At the time, almost all American motorcycles used this type of brake. The drum brakes used in modern motorcycles are developed on this basis.
When the drum brake is applied, the external force exerts a force on the two half-moon brake shoes to press the inner wall of the drum, and the frictional force prevents the brake drum from rotating to achieve the braking effect.
The working principle can be described as a cup with a picture. The brake drum is like a cup. When you put five fingers into the rotating cup, the finger is the brake pad. As long as you point the five to the outer one and rub the inner wall of the cup, the cup will stop rotating.
Although the drum brakes were promoted and used earlier, the disc brakes appeared three years earlier than the drum brakes.
In 1913, a British-made Douglas brand motorcycle that participated in the French Grand Prix was installed with a mechanically-operated disc brake. This is the world's first motorcycle to use disc brakes.
In 1969, Honda Japan took the lead in using hydraulically operated disc brakes on Honda 750 motorcycles. Since then, all of the world's road and motorcycle manufacturers have used this advanced hydraulic disc brake.
Disc brakes, brake discs are made of cast iron or alloy steel and fixed to the wheels, rotating with the wheels. The caliper is fixed on the front shock absorber or the rear rocker arm. The two friction plates on the brake caliper are respectively mounted on the two sides of the brake disc, and the hydraulic pushes the friction disc to rub against the brake disc, as if the pliers are used to clamp the rotation. The plate reaches the role of the deceleration brake.