Ntn Corporation

Shintaro Ishikawa

Takahide Saito

Naotsugu Kitayama

Koji Sato

Kyohei Sasanuma

A rotation transmission device includes an electromagnetic clutch including an armature, a rotor having an outer tubular portion and an inner tubular portion, and an electromagnet. A bearing support tube is provided at the outer end surface of a core supporting an electromagnetic coil of the electromagnet. A bearing is mounted in the bearing support tube so as to be axially fixed in position and not to be pulled out of the bearing support tube. The small-diameter tubular portion is provided at the end of the inner tubular portion of the rotor, and press-fitted in the bearing such that the rotor and the electromagnet form a unit.

Rotation transmission device

A rotation transmission device includes an inner ring provided on an input shaft, an outer ring provided on an output shaft, rollers mounted between the inner periphery of the outer ring and the outer periphery of the inner ring, an electromagnet as a driving source for moving a roller retainer mounted at the end portion of the housing on the side of the input shaft, a first bearing mounted between the electromagnet and the input shaft, a second bearing mounted between the end portion of the housing on a side of the output shaft and the output shaft, and a third bearing mounted between the inner ring and the outer ring. The rotation transmission device further includes a fourth bearing configured to prevent inclination of the axes of the input shaft and the output shaft relative to each other.

A rotation transmission device includes an electromagnetic clutch which selectively engages and disengages a two-way clutch configured to selectively perform and stop transmission of torque between an input shaft and an output shaft. A spring holder fitted on the input shaft prevents rollers from axially moving. Spring holding pieces mounted to the spring holder are formed with respective engagement surfaces engaging with cam surfaces of an outer periphery of an inner ring such that the spring holder is rotationally fixed.

Growing community of inventors

Shizuoka, Japan

Shintaro Ishikawa