Mitsuboshi Belting Ltd.

Satoshi Oishi

Tetsuo Yoneda

Koji Nishiyama

The present invention pertains to an auto tensioner () to be provided in an auxiliary-driving belt system, including a friction member () that is sandwiched between an arm () and an inner circumferential surface of an outer cylindrical portion () of a base () in the radial direction of the outer cylindrical portion () and that has an arc-shaped surface () locked to the arm () and slidable with respect to the inner circumferential surface of the outer cylindrical portion (), in which the friction member () is provided so that the arc-shaped surface () remains at a height equal to or higher than a horizontal plane (HP) passing through a central axis (R) when sliding with respect to the inner circumferential surface of the outer cylindrical portion () as the arm () oscillates.

Auto tensioner provided in auxiliary device drive belt system

The present invention relates to an auto-tensioner containing a base having a cylindrical part, a rotating member supported rotatably to the base, a pulley provided at the rotating member, a friction member sandwiched between the cylindrical part and the rotating member, and a coil spring locked to the friction member and the base and disposed in a state of being compressed in an axial direction, thereby biasing the rotating member in one direction, in which the friction member has an arcuate surface capable of sliding along the cylindrical part, a first locking part located further toward the one direction side than the arcuate surface in a circumferential direction of the cylindrical part and locked to the rotating member, and a second locking part locked to one end of the coil spring.

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Hyogo, Japan

Satoshi Oishi