Roller bearing clutch is a new type of friction type overrunning clutch.
Compared with previous overrunning clutches, roller bearing clutch has high load capacity, reliable spragging and long life, etc. It has the functions of both clutch and bearing and can simplify the transmission structure, so it is widely used.
Roller bearing clutch is mainly composed of inner ring, roller, outer ring, roller cage, stopper, snap ring, spring plate, seal ring, etc.
The working principle of roller bearing clutch is similar to the taper thread tightening process, it is a clutch formed by replacing the taper thread screw teeth with rollers arranged at a certain helix angle, the rollers are arranged in a right rotation on the inner and outer ring raceway, when the outer ring starts to rotate counterclockwise under the action of torque, the rollers are driven to rotate through the action of friction.
Due to the angle between the axis of the rollers and the axis of the raceway, the movement of the rollers is decomposed into two parts, i.e. rotation around the axis and movement along the axis.
Since the structure ensures that only the outer ring can move along the axis direction among the inner and outer rings and the roller, the movement of the outer ring to the right causes the normal distance between the inner and outer rings to decrease, the pressure on the roller increases and the wedge tightens, and the inner and outer rings rotate at the same speed. And when the outer ring has clockwise movement relative to the inner ring, the outer ring moves to the left, the normal spacing between the inner and outer rings becomes larger, and the rollers rotate freely, so that the bearing clutch realizes the clutch function.
If the inner and outer ring are arranged in the raceway with left rotation, the movement is opposite to the above, and the clutch is spragged when the outer ring rotates clockwise and unspragged when it rotates counterclockwise.