Nsk Corporation

Nippon Seiko Kabushiki Kaisha

Kouichi Sakai

Hiroshi Suzuki

Hayato Oumi

Hideo Ouchi

Shigenori Murata

Shuhei Aoki

An autotensioner for use in applying a tension to a moving belt, includes a bracket secured to an engine body and having a projection, a rocking member rockingly mounted to the bracket through a first axle and having an arm, a pulley rotatably mounted to the rocking member through a second axle for applying the tension to the moving belt, and a damper device provided between the projection of the bracket and the arm of the rocking member.

Autotensioner

An autotensioner for use in applying a tension to a moving belt, having a damper apparatus which can follow a sudden change in tension of the belt by improving the piston and plunger structure of the damper apparatus so that the viscous fluid has a liquid surface kept high even when the plunger rises its uppermost position to prevent air from entering underneath the piston.

Damper apparatus for an autotensioner

An autotensioner for use in applying a tension to a moving belt, comprises a bracket secured to an engine body and having a projection, a rocking member rockingly mounted to the bracket through a first axle and having an arm, a pulley rotatably mounted to the rocking member through a second axle for applying the tension to the moving belt, and a damper device provided between the projection of the bracket and the arm of the rocking member.

An auto tensioner comprises a rocking member the base end portion of which is supported by a fixed shaft so that it can rock freely, and on the tip end portion of which there is a pulley that is freely rotatably supported, a torsional coil spring for applying a resilient force in the rotational direction to the rocking member so that it pushes the pulley onto the belt, a damper device located between the rocking member and a fixed projection located in a base member wherein when the rocking member is turned by the resilient force of the torsion coil spring, the bottom of the damper device and the projection supported by the base member are separated so as to move the pulley quickly, and when the rocking member is turned in the opposite direction, the rocking arm pushes the top end of the damper device, so that the pulley is displaced slowly by the movement of the damper device whereby it does not require much space, and so that it can effectively do away with slack in the belt.

Auto tensioner

The belt tentioner includes a solid damping device between the pivotal member and the fixed member, and the amount of deformation of the solid damping device and that of a spring are adapted to be set independently of each other. This permits the vibration damping operation by the solid damping device and the tensioning operation by the spring to be performed under the respective optimum conditions.

Growing community of inventors

Zama, Japan

Kouichi Sakai