Coupling ring structure for e.g. cone synchronizer of motor car, has constriction portions that are provided in friction elements which are held in recesses of conical or cylindrical annular portion

摘要

The coupling ring structure (1) has a conical or cylindrical annular portion (2) that is provided with several recesses (3). Friction elements (4) are held in the recesses. The friction elements are provided with constriction portions (5). A base surface (9) is provided in the friction element. Two arm portions (10) are extended from the base surface along the circumferential direction. The annular portion is provided with a radial projection portion.