Function of drawn cup needle roller clutch

• The function of drawn cup needle roller clutch is to make a certain element can only rotate in a certain direction and lock in another direction.The clutch can be devided into roller type and wedge type.
  

Generally speaking,the former is commonly used.Of course,in the automatic transmission,one-way clutch is not limited to the actuator,for example,in the hydraulic torgue converter guide wheel support, clutch bearing is also applicated.

Unidirectional clutch is commonly known as one-way needle roller bearing,which can only rotate in single direction (clockwise or counterclockwise direction). If the power source changes the direction( such as clockwise to counterclockwise),the passive element will automatically disengage without any power transmission function.