Most family cars are designed in the front, and the brake calipers are in the rear. The performance pursued is different, mainly with the following differences:
1. As an important part of vehicle safety, the brake system is basically disc brake. Only a few low-grade vehicles are still drum type. Calipers and brake discs are installed in the wheel hub. These two parts jointly generate braking force to slow down or stop the vehicle.
2. When the car moves forward, the ground will give an upward force to the front wheel. If the caliper is in front of the brake disc, when stepping on the brake, the caliper and the brake disc should work together to stop the tire. If the tire moves forward, the force given by the caliper to the brake disc will be upward. In this way, the two upward forces are superimposed on each other. In case of emergency braking, the force on the tire bearing shaft will be greater, In this way, the forward tilt of the car is greater, that is, it is more prone to tumbling accidents.
3. If the front wheel caliper is installed behind the brake disc, the force will be different. At this time, the direction of the force exerted by the caliper on the brake disc changes to downward, and the force exerted by the ground on the tire is still upward. In this way, the forces in opposite directions will be subtracted, so that the pressure borne by the tire bearing will be reduced, and the safety and stability of the vehicle will be better.
4. The stress condition of the rear wheel bearing is the same as that of the front wheel, but the force required is different from that of the front wheel. The rear of the car is lighter than that of the front. If the caliper is placed behind the brake disc, it is easier to swing the rear and tilt the head. Therefore, in order to ensure the safety and stability of the rear, we need to add force to the rear, so the caliper is placed in front of the brake disc, The vehicle is more stable.