1. The disc brake
also known disc brake disk brake, whichever shape suggests that it is named. It is controlled by a hydraulic pressure, the main components include a brake disc, cylinder, brake caliper, tubing and the like. Producing a steel brake disc fixed to a wheel and, with the rotation of the wheel.
type hydraulic disc brakes, the hydraulic control, the main components include a brake disc, cylinder, brake caliper, tubing and the like. Disc brake fast heat, light weight, simple structure, easy to adjust. In particular, high temperature performance at a high load, the braking effect is stable, mud invasion and afraid, and driving in winter under poor road conditions, many cars use a flat disc brake brake disc, brake disc and the punch stroke wire brake disc, wherein the braking effect and the heat dissipation capacity of scribing brake disc are better.
The disc brake has been widely used in cars, but in addition to all the wheels of the car on the outside of some high-performance, large as only the front wheel brake, the engagement with the rear drum brakes, have to Automobile higher directional stability during braking. On the lorry, disc brakes are also used, but still a considerable distance away from the universal.
Composition
Brake disc
1. The diameter of the disc
Brake disc diameter should be taken larger as D, then the effective radius of the brake disc is increased, the clamping force of the brake caliper can be reduced, reducing the unit pressure and temperature of the pad. Limited by rim diameter, the diameter of the brake disk 70 is typically selected percentage of a 79 percent by rim diameter. The total mass greater than the upper limit should be taken 2t automobiles.
2. The thickness of the brake disc
The thickness of the brake disc temperature when the impact on the quality and the brake disc. For mass smaller, the thickness of the brake disc should not made great; in order to reduce the temperature, and the thickness of the brake disc should not be made too small. The brake disk can be made into a solid, or to bulkHeat ventilation needs ventilation duct in the middle of cast brake disc. Usually a thickness preferably of a solid brake disc 10mdash; 20mm, thickness ventilated brake disc is taken as 20 ~ 50mm, more use is 20mdash; 30mm. Moving at high speed emergency braking, the brake disc will form thermal deformation, resulting in shaking. To improve the thermal performance of the brake disc friction surfaces, the brake disk made mostly empty intermediate ventilated brake disc, the brake disc so that the temperature can be reduced by 20 to 30 percentage percentage.
the friction pad
refers to the friction pad friction material is pressed against the jaw piston pushes the brake disc. Friction material into friction pad and plate, both directly press-fitted together. The ratio of the outer radius of the friction pad with only the inner radius and the outer recommended friction pad inner radii not greater than 1.5. If this ratio is too large, the outer edge of the pad when the work and the inner circumferential speed difference between the more uneven wear, the contact area, resulting in a large change in braking torque. For disc brake pad work area A, it is recommended to use in the 1.6 to 3.5 (kg ╱ cm) range of the brake pad unit area occupied by the vehicle mass. Producing a steel brake disc fixed to a wheel and, with the rotation of the wheel. Cylinder fixed immovably on the bottom plate of the brake, on the two friction plates are mounted on both sides of the brake caliper of the disc brake, the piston cylinder by hydraulic pressure tubing conveyed, pressed to push the brake friction plate friction disc brake, the operation of forceps clamped together if the rotating plate, forcing it to stop the same.