Patent ID: 9599174
Date: 2017-03-21
CPC Classifications: B60N,F16D

Claim:
1. A brake device, comprising: an outer race having a cylindrical inner peripheral surface; at least two brake cams arranged inside the outer race in a circumferential direction, each of the brake cams having brake surfaces located at both ends in the circumferential direction of a side of the brake cam facing the outer race, each of the brake surfaces being contactable with the cylindrical inner peripheral surface of the outer race; and an output-side rotary member arranged at radially inner sides of the respective brake cams, the output-side rotary member including contact portions contactable with surfaces of the brake cams facing the radially inner sides, the output-side rotary member being configured to rotate together with the brake cams, wherein a rotational motion received by the brake cams is transmitted to effect a motion of the output-side rotary member, while a rotational motion of the output-side rotary member as effected in at least one direction causes both of the brake surfaces at the both ends to be pressed concurrently on the inner peripheral surface of the outer race, and thus is not transmitted, effecting no motion of the brake cams, and contact points at which the respective contact portions and the respective brake cams are contactable with each other are on an axis-of-rotation side that is one side of a both-end reference plane on which an axis of rotation of the output-side rotary member is located, or on the both-end reference plane, the both-end reference plane being a plane connecting outer ends of the respective brake surfaces located at the both ends of a corresponding brake cam of the at least two brake cams.