Ramp and roller type:

The outer ring of the bearing here is the same as the ordinary bearing, which is a bobbin type outer ring. But its inner ring structure is more special, its inner ring is a circle with a slope.

In addition, it consists of a roller that is always in contact with the inner and outer rings and a spring that is in contact with the roller. The working face of the roller is a slope, when the bearing turns along, the roller is in a downhill state, the downhill space is large, and the roller will not be affected.

When turning backwards, the roller is uphill, the uphill is relatively narrow, the roller is stuck, and the bearing is locked.

Another one-way bearing structure is the wedge type structure:

A set of CAM wedges is arranged between the inner ring and the outer ring of the bearing. The CAM has two diameters of different sizes, in which the size of the long warp is greater than the distance between the inner ring and the outer ring, and the short warp is less than the distance between the inner ring and the outer ring of the bearing.

Between the wedges there is a cylindrical winding spring connected end to end to form a ring spring arranged on the fulcrum of the wedge block, through the action of the spring, the wedge block can be reset.