Patent ID: 6458054
Filing Date: 2002-10-01
Classification: F16H

Abstract:
A transmission comprising an endless transmitting member having many engagement portions arranged at equal intervals in the peripheral direction on the inner peripheral surface thereof and a pair of rotating bodies around which the transmitting member passes, in which a transmitting member winding portion of at least one rotating body is formed by many movable members which are arranged at intervals in the circumferential direction of the rotating body and capable of moving in the radial direction of the rotating body, and the diameter of the winding portion of the rotating body is increased or decreased by moving the movable members in the radial direction,wherein there is provided a winding member with ends which are wound around the winding portion of the rotating body from the outside, one end of which is fixed to a predetermined movable member, the other end side of which is inserted into the inside of the winding portion in an unfixed state between predetermined movable members, and which has many engagement portions engaging with engagement portions of the transmitting member on the outer peripheral surface, the movable members are provided so as to move stepwise in the radial direction of the rotating body so that the circumferential length of the winding member at the winding portion changes in increments of the predetermined number of the engagement portions, and when the winding member and the transmitting member are engaged with each other with the winding member engagement portions engaged with the transmitting member, adjacent bending points in the longitudinal length of the transmitting member lie along a single circumferential arc.