Patent ID: 7125191
Filing Date: 2006-10-24
Classification: F16D,Y10T

Abstract:
1. A power transmission device comprising: a shaft capable of rotating around an axis; and a rotation body press-fitted and fixed to the shaft in a direction parallel to the axis of the shaft to rotate along with the shaft; wherein the rotation body comprises a main body and a homogenous one-piece cylindrical member, wherein a drive source is connected with the main body, wherein a press-fit surface of the shaft and the rotation body are in mutual contact, wherein a press-fit surface of the cylindrical member that is an inner peripheral surface of the cylindrical member exerting a press-fit force on a press-fit surface of the shaft in a direction perpendicular to the axis of the shaft, the press-fit surface of the shaft being parallel to the axis of the shaft, the shaft has a tapered seating face, the cylindrical member is press-fitted to the seating face in the direction parallel to the axis of the shaft, the shaft has a thread surface, the main body has a thread surface, the thread surface of the shaft being screw-engaged with the thread surface of the main body, the main body and the cylindrical member are abutting on each other at their end surfaces in the direction parallel to the axis of the shaft, the seating face is disposed between the press-fit surface and the thread surface of the shaft.