Patent ID: 9574616
Date: 2017-02-21
CPC Classifications: F16D,H02K

Claim:
1. A joint device comprising: a drive rotor fixed to a drive shaft; a driven rotor fixed to a driven shaft; and a ring-shaped buffer located between the drive rotor and the driven rotor, wherein; the drive rotor includes a drive engagement portion that projects toward the driven rotor in an axial direction; the driven rotor includes a driven engagement portion that projects toward the drive rotor in the axial direction; the buffer includes an outer surface, which includes a first engagement recess and a second engagement recess that are recessed toward a radially inner side; the drive engagement portion is inserted into the first engagement recess engageable in a rotation direction; the driven engagement portion is inserted into the second engagement recess engageable in the rotation direction; and an outer diameter of a bottom surface of the second engagement recess is smaller than an inner diameter of the driven engagement portion; and the drive rotor and the driven rotor respectively include a drive contact portion and a driven contact portion, and the drive contact portion and the driven contact portion directly contact each other in the rotation direction when a load acting on the driven rotor is greater than or equal to a predetermined level.