Fuji Kiko Co., Ltd.

Fujikiko Kabushiki Kaisha

Masanobu Yamazaki

Ken Matsuoka

Masato Shibata

An automatic tensioner for applying a tension to a belt of an engine for a vehicle comprises a shaft fixedly mounted on a part of the vehicle. An arm has a proximal section which is supported by the shaft for angular movement thereabout, and a free end section of the arm is located on the side opposite to the proximal section. A pulley is supported by the free end section of the arm for angular movement thereabout and is in contact with the belt. A plate element is provided which is fixedly mounted on the shaft. A plurality of rolling elements are arranged between the proximal section of the arm and the plate element. The rolling element rolls between the proximal section of the arm and the plate element to support the proximal section for angular movement. The arm is moved angularly by a spring about the shaft to bias the pulley toward the belt.

Automatic tensioner

A method for manufacturing a poly-V pulley includes a process for slitting and compressing the peripheral edge portion of an essentially flat blank for forming a widened and thickened flange wall. A series of relatively narrow, deep, V-shaped grooves are cold rolled. The poly-V pulley thus produced has the flange wall with poly-V grooves, from the intermediate portion of which a web extends radially inward. This structure provides good dynamic balance of rotation for the pulley and thus prolongs the life not only of the pulleys per se but also the belt to be put around the pulley. Further, the manufacturing method allows the manufacture of relatively small diameter poly-V pulleys.

Grooved pulley and manufacturing method therefor

A speed reduction mechanism comprises a drive member rotated by a rotary drive force of a drive source; a fixed member opposing to the drive member; a rotor disposed between the drive member and the fixed member and contacting the drive member and the fixed member and rotated around itself by the rotation of the drive member and revoluted around a rotary central portion of the drive member; and a speed reduction rotary member for rotatably supporting the rotor and rotated around the rotary central portion of the drive member by the revolution of the rotor. An auxiliary drive apparatus of an internal combustion engine comprises a stepless speed change mechanism disposed in a power transmission system from a crankshaft of the internal combustion engine to a pulley for driving the auxiliary drive apparatus, the stepless speed change mechanism steplessly changing the rotational speed of the crankshaft and transmitting the rotation of the crankshaft to the pulley; and a mass for restricting the oscillation of the crankshaft through an elastic member, the mass being disposed in a crankshaft system of the auxiliary drive apparatus. The auxiliary drive apparatus of an internal combustion engine further comprises a second pulley different from the pulley and disposed in a crankshaft system of the auxiliary drive apparatus and driving the auxiliary drive apparatus.

Growing community of inventors

Kosai, Japan

Masanobu Yamazaki