Exedy

It is intended to achieve enhancement in strength of a screw portion. The present bicycle power transmission device includes a first rotor, a second rotor, an elastic member, a stopper member, and a first nut. The first rotor includes a stopper surface oriented in a circumferential direction. The second rotor is disposed to be rotatable relative to the first rotor. The elastic member elastically couples the first rotor and the second rotor therethrough to each other. The stopper member is attached to the second rotor. The stopper member includes a stopper portion and a first screw portion. The stopper portion is opposed to the stopper surface in the circumferential direction. The first screw portion is integrated with the stopper portion and extends in an axial direction. The first nut is screwed onto the first screw portion.

It is intended to enhance comfortableness in riding a bicycle in which a bicycle power transmission device is installed. The present bicycle power transmission device includes a first rotor, a second rotor, a friction member, and an elastic member. The second rotor is disposed to be rotatable relative to the first rotor. The friction member is disposed between the first rotor and the second rotor. The friction member is disposed to be rotatable relative to the first rotor. The friction member is configured to be rotated unitarily with the second rotor. The elastic member elastically couples the first rotor and the second rotor therethrough to each other. The friction member includes a base portion, a pawl portion, and a protruding portion. The base portion has an annular shape. The pawl portion extends from the base portion to a first side in an axial direction. The protruding portion is disposed radially inside the pawl portion. The protruding portion protrudes from the base portion to the first side in the axial direction. The second rotor includes an engaging hole and an engaging recess. The engaging hole causes the pawl portion to be engaged therewith. The engaging recess causes the protruding portion to be engaged therewith.

It is intended to perform swaging in a stable condition. A crank arm is rotated unitarily with a first rotor. The first rotor includes a hub portion and a flanged portion. The hub portion extends in an axial direction. The flanged portion extends radially outward from the hub portion. The crank arm includes an attachment portion and an arm body. The attachment portion is attached to the hub portion. The arm body extends radially outward from the attachment portion. The attachment portion includes an attachment body and a distal end. The attachment body is contacted with the hub portion in the axial direction. The distal end extends from the attachment body in the axial direction. The distal end is smaller in outer diameter than the attachment body. The distal end is swaged to the hub portion. The attachment body is larger in outer diameter than the hub portion.

It is intended to control in which direction a coil spring protrudes. The present bicycle power transmission device includes a first rotor, a first plate, a second plate, and a coil spring. The first rotor includes a hub portion, a flanged portion, and an accommodation hole. The hub portion extends in an axial direction. The flanged portion extends radially outward from the hub portion. The accommodation hole is provided in the flanged portion. The first plate is disposed on a first side of the flanged portion in the axial direction. The first plate is disposed to be rotatable relative to the flanged portion. The second plate is disposed on a second side of the flanged portion in the axial direction. The second plate is configured to be rotated unitarily with the first plate. The coil spring is disposed in the accommodation hole. The coil spring elastically couples the first rotor and both the first and second plates therethrough to each other. The flanged portion slants in the axial direction.

It is intended to inhibit first and second plates from being abraded. A coil spring is disposed in a first window portion of a first plate, a second window portion of a second plate, and an accommodation hole of a first rotor. The first plate includes a first contact surface and a first cutout portion. The first contact surface is in contact with an end surface of a coil spring. The first cutout portion is provided in the first contact surface. The second plate includes a second contact surface and a second cutout portion. The second contact surface is in contact with the end surface of the coil spring. The second cutout portion is provided in the second contact surface.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …