Autotensioner
AssigneeNtn Corporation
InventorsKen Yamamoto, Katsumi Furutani
Life of this patent
Estimating the term…
Abstract
A belt autotensioner capable of adjusting the fluctuating belt tension smoothly and free of shaking motion of the belt and delay in action. A tension adjusting spring is coupled to an eccentrically pivotable pulley support member. A damper for damping the pivoting speed of the support member is provided between the support member and the fixed member. The fixed member is provided with a cam surface abutting a piston of the damper. The cam surface is tapered downwards in a direction in which the support member pivots in a direction to increase the belt tension.
Claims8
An autotensioner comprising a pulley, a fixing shaft, a pulley support member eccentrically supported on said fixing shaft so as to be pivotable, a tension adjusting spring coupled to said support member for applying torque to said support member in such a direction as to increase the tension of a belt, a fixed member provided opposite to said support member, a damper provided between said support member and said fixed member for damping the pivoting speed of said support member, characterized in that said damper comprises a cylinder provided in one of said support member and said fixed member, a piston mounted in said cylinder and an elastic member for urging said piston to protrude outwards from said cylinder, the other of said support member and said fixing member being provided with a cam surface abutting said piston, said cam surface being tapered downwards in such a direction that said support member pivots to increase the belt tension.
Dependencies are inferred from the claim text.