| 摘要 |
<p>PROBLEM TO BE SOLVED: To miniaturize a torque limiter by constituting an inner ring by assembling a plurality of branched inner rings in an axial direction, and forming a branched inner ring made of sintered alloy, in a device wherein a desired torque is generated between the inner ring and a transmission member when the inner ring and an outer member are relatively rotated. SOLUTION: When a shaft 15 is rotated and a torque is transmitted from a branched inner ring 1b to a branched inner ring 1a made of oil-reraining sintered alloy through a fitting part of an engaging protrusion part 19 and an engaging recessed part 18, namely, when an inner ring 1 is rotated in a winding direction of a coil spring 2 with respect to an outer member 3, the coil spring 2 is rotated together with the inner ring 1 in a rotational direction of the inner ring 1, and force of the diameter enlarging direction is acted on a small diameter part 2a. Fastening and winding force of the small diameter part 2a is loosened, the branched inner ring 1a is rotated integratedly with the branched inner ring 1b while generating a constant torque at the branched inner ring 1a. In the case where the inner ring 1 is rotated in the direction reverse to the winding direction of the coil spring 2, force of diameter contacting direction is acted on the small diameter part 2a, the fastening and winding force is increased, and the inner ring 1 is locked.</p> |
