| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a spring retainer from falling into a snap ring engaging groove when assembling, and to reduce a dimension in an axial direction. SOLUTION: A spline groove 6a and the snap ring engaging groove 6c are formed on an inner peripheral surface of a drum 6, a cylinder 10 is arranged inside the drum 6, and the spring retainer 16 is arranged on the inner peripheral surface of the drum 6 so as to abut to the cylinder 10 and support one end of a return spring 15 at an inner surface thereof. An outer surface of the spring retainer 16 is supported by engaging the snap ring 17 to the snap ring engaging groove 6c. A plurality of pawls 16b longer than the snap ring engaging groove 6c in its axial direction are formed so as to be bent in an axial direction. By sliding contact of the pawls 16b to an outer periphery of the cylinder 10, centering of the spring retainer 16 is carried out.</p> |
