Patent ID: 8402851
Filing Date: 2013-03-26
Classification: B60K,F16H,Y10T

Abstract:
1. A friction roller type transmission mechanism, wherein: a pair of friction rollers that rotate about respective axes parallel to one another are pressed against one another in a radial direction of the friction rollers into frictional contact with one another in one of a direct manner and an indirect manner, to allow power transmission between the friction rollers; one of the friction rollers is rotatably supported with respect to an eccentric shaft portion of a crankshaft whose rotational position is adapted to be controlled to adjust a radial pressing force between the friction rollers; a friction roller shaft is drivingly engaged with the one of the friction rollers, arranged coaxially with a corresponding axial end of the crankshaft to face the axial end, and bearing-fitted to the axial end; a first bearing support is disposed in a plane perpendicular to an axial direction, which plane contains a portion of the bearing-fitting, wherein the friction roller shaft related to the one of the friction rollers, and a friction roller shaft related to another of the friction rollers are bearing-fitted to the first bearing support, and a second bearing support is disposed in a plane opposite to the first bearing support with respect to the friction rollers, wherein the crankshaft related to the one of the friction rollers, and the friction roller shaft related to the other of the friction rollers are bearing-fitted to the second bearing support, so that the first and second bearing supports bear a radial pressing reaction between the friction rollers; and support stiffness of the first bearing support against the radial pressing reaction between the friction rollers is higher than that of the second bearing support.