Patent ID: 9193067
Filing Date: 2015-11-24
Classification: B25J,F16H,H01L

Abstract:
1. A rotation-transmitting mechanism with a first stage and a second stage, comprising: a first rotating body having a center axis of rotation about which the first rotating body is rotatable, the first rotating body including a first outer circumferential portion provided in the first stage and a second outer circumferential portion provided in the second stage, the first rotating body being formed such that a distance from the center axis of rotation to the first outer circumferential portion and a distance from the center axis of rotation to the second outer circumferential portion are different from each other; a second rotating body rotatable about the center axis of rotation and including a first inner circumferential portion opposed to the first outer circumferential portion in the first stage and a second inner circumferential portion opposed to the second outer circumferential portion in the second stage, the second rotating body being formed such that a distance from the center axis of rotation to the first inner circumferential portion and a distance from the center axis of rotation to the second inner circumferential portion are different from each other; a driving rotating body that is brought into contact with the first outer circumferential portion and the first inner circumferential portion in the first stage, fixed to an output shaft of a motor at a position offset from the center axis of rotation, and directly rotated by the motor; a plurality of planetary rotating bodies that are brought into contact with the second outer circumferential portion and the second inner circumferential portion in the second stage and revolve around the first rotating body; an output portion to output revolution movements of the plurality of planetary rotating bodies; and a hollow portion that is formed at the center axis of rotation to form a path through the rotation-transmitting mechanism extending along the center axis of rotation.