时间：2013-11-20 09:07　作者：admin　点击： 次

The centrifugal clutch is a kind of clutch that relies on the centrifugal force generated by the centrifugal body to achieve automatic separation or engagement. The commonly used clutch is normally open. Under the action of the tension spring, the active part brake block and the driven part drum are disengaged. When the speed reaches a certain level After the value, the centrifugal force increases to overcome the spring force to make the brake block swing outwards and press the driven drum, and the clutch enters the engaged state and rotates together.The working principle of the normally closed centrifugal clutch is opposite to that of the normally open type.In normal operation, the brake block is pressed against the drum by the compression spring, and keeps engaged and rotates together.When the rotation speed exceeds a certain value, the centrifugal force is greater than the spring pressure, so that the brake block swings around the fulcrum and disengages from the drum surface to limit the rotation speed of the driven part.
The structure of centrifugal clutch has two types: brake block and steel ball type. The brake block is divided into spring brake block and non-speed spring brake block. The latter is widely used because of its simple structure and light weight.
The hub with blades of the steel ball centrifugal clutch is active, and the shell is the driven. Many small steel balls are placed between the blades and the shell. When the speed reaches a certain level, the steel balls are thrown towards the shell by centrifugal force, making the master and slave Part enters the engaged state and rotates together.
The centrifugal clutch starts relatively smoothly and can skid for safety protection when overloaded, but the skid time is not easy to be too long. Generally, it should be limited to 1.5min. The centrifugal clutch is not suitable for low-speed and variable-speed transmission systems.