Clutch and motor

摘要

A clutch including a drive shaft, drive side rotation body, driven shaft, driven side rotation body, clutch housing, and lock member is disclosed. During non-rotation of the drive side rotation body, when the driven side rotation body is rotated, the lock member is pushed by the driven side rotation body and moved outward in a radial direction thereby bringing the contact portion into contact with the inner circumferential surface of the clutch housing. During rotation of the drive side rotation body, the drive side rotation body pushes a drive side cam surface in the rotation direction, and the drive side cam surface acts to move the lock member inward in the radial direction and push the lock member against the driven side rotation body. Thus, the lock member is sandwiched between the drive side rotation body and the driven side rotation body thereby coupling the drive side rotation body and the driven side rotation body with the lock member to be integrally rotatable.

主权项

1. A clutch comprising:
a drive shaft; a drive side rotation body integrally rotatable with the drive shaft; a driven shaft arranged coaxially with the drive shaft; a driven side rotation body integrally rotatable with the driven shaft; a clutch housing in which the drive side rotation body and the driven side rotation body can be arranged; and a lock member arranged between the drive side rotation body and the driven side rotation body inside the clutch housing, wherein the lock member includes a contact portion, which contacts with and separates from an inner circumferential surface of the clutch housing, and a drive side cam surface with which the drive side rotation body comes into contact from a rotation direction,wherein
the drive side cam surface includes a part of an outer peripheral surface of the lock member, the driven side rotation body includes a camshaft having an elliptical cross-section, the elliptical cross-section includes a major axis and a minor axis, the major axis being longer than the minor axis, during non-rotation of the drive side rotation body, when the driven side rotation body is rotated, the lock member is pushed by the driven side rotation body and moved outward in a radial direction thereby bringing the contact portion into contact with the inner circumferential surface of the clutch housing such that the lock member is sandwiched between the clutch housing and the driven side rotation body and inhibits further rotation of the driven side rotation body, and during rotation of the drive side rotation body, the drive side rotation body pushes the drive side cam surface in the rotation direction, and the drive side cam surface acts to move the lock member inward in the radial direction and push the lock member against the driven side rotation body so that the lock member is sandwiched between the drive side rotation body and the driven side rotation body thereby coupling the drive side rotation body and the driven side rotation body with the lock member to be integrally rotatable.