Patent ID: 8997964
Filing Date: 2015-04-07
Classification: B66D,F16D,F16H,H02K

Abstract:
1. A load sensitive magnetic clutch device, comprising: an output rotating member having a claw clutch projection at an end thereof, and having a magnetic pole rotating body that has magnetic poles arranged on a circumference of the magnetic pole rotating body and that is configured to rotate about an axial center of rotation; a low-torque input member having a yoke rotating body that is configured to rotate about the axial center of rotation of the magnetic pole rotating body, wherein the yoke rotating body includes a tooth-shaped portion that has tooth tips configured to face the magnetic poles of said magnetic pole rotating body to transmit a torque between the tooth tips of the yoke and said magnetic pole rotating body by a magnetic attracting force; and a high-torque input member configured to rotate about the axial center of rotation, said high-torque input member having a claw clutch engaging portion arranged to engage said claw clutch projection on said output rotating member; wherein said claw clutch engaging portion of said high-torque input member includes: wherein said claw clutch projection is formed of a magnetic body; wherein said clutch retaining magnetic body of said claw clutch engaging portion comprises a claw clutch disengaging portion configured to reduce an attracting force caused by the magnetic force between said claw clutch projection and said clutch retaining magnetic body at an intermediate portion between said forward rotation torque transmission side surface and said reverse rotation torque transmitting side surface; and wherein said claw clutch projection is arranged with said output rotating member so as to be attracted by said clutch retaining magnetic body upon application of a load torque exceeding a torque which is transferrable between said magnetic pole rotating body and said low-torque input member.