Use the mutual friction between non rotating components connected to the vehicle body (or frame) and rotating components connected to the wheel (or transmission shaft) to prevent the rotation or tendency of the wheel. A brake is a device that has the function of slowing down, stopping, or maintaining a stopped state of moving parts (or moving machinery). The brake mainly consists of a brake frame, brake components, and control devices, and some brakes are also equipped with automatic adjustment devices for brake component clearances. In order to reduce braking torque and structural dimensions, brakes are usually installed on the high-speed shaft of equipment, but large equipment with high safety requirements (such as mine hoists, elevators, etc.) should be installed on the low-speed shaft near the working part of the equipment.