Patent ID: 8636599
Filing Date: 2014-01-28
Classification: F16F,Y10T

Abstract:
1. A torque fluctuation absorber, comprising: a center plate rotatably arranged; a side plate arranged coaxially with and rotatably relative to the center plate; an elastic member accommodated in a space surrounded by the side plate, and absorbing torque fluctuations generated between the side plate and the center plate; a cover member separating the space and an outside space from each other by covering a clearance between the center plate and the side plate; a vent portion arranged inwardly in a radial direction of the side plate relative to the cover member and providing ventilation between the space and the outside space; wherein the side plate includes a cylindrical portion arranged inwardly in the radial direction of the side plate relative to the center plate, the center plate being rotatably supported by the cylindrical portion via a bearing; wherein the space is continuous and is defined by the center plate, the side plate, the cover member, and the bearing; wherein the vent portion includes a groove portion provided at part of any one of an outer peripheral surface of the cylindrical portion and an inner peripheral surface of the bearing; and wherein the cylindrical portion and the bearing, other than the groove portion, are in contact with each other and the cylindrical portion is fixed to the bearing.