RIBBON SPRING FOR SPRAG-TYPE ONE-WAY CLUTCH, AND SPRAG-TYPE ONE-WAY CLUTCH

摘要

This invention makes it possible to obtain smooth sliding properties at the contact parts of sprags and tongue parts, which bias the sprags in the direction of engagement, in a sprag-type one-way clutch. A plurality of pockets (52) are formed, at intervals in the length direction of an elongated belt-shaped plate part (51) formed from sheet metal, by punching, which is a type of shearing processing, and tongue parts (54) that protrude inside the pockets (52) are provided on one side of pillar parts (53) formed between adjacent pockets (52) in the peripheral direction. The belt-shaped plate part (51) is bent into a circular shape and installed between an outer ring (10) and an inner ring (20), and the sprags (30), which are respectively inserted into the pockets (52), are biased in the engagement direction by the tongue parts (54). The sliding properties are improved by bending the belt-shaped plate part (51) such that a shear drop (58) formed on the cut edge surface of the sheared edge of the tongue part (54) is on the outer diameter side, and bringing the shear drop (58) into contact with the sprag (30).