| 摘要 |
A torque transmission device which is provided with a low torque input means (8), an output rotating means (11) which is magnetic-coupled to the low torque input means so as to generate thrust force by sensing a load, and a high torque input means (15) which is engaged with the output rotating means (11) to transmit the torque during the rotation of a high load, wherein the low torque input means (8) has pole teeth (9) which face magnetic poles (12) of the output rotating means so as to be magnetic-coupled during the rotation of a low load, and side section magnetic substances (10) which face the magnetic poles (12) slid by the thrust force generated by the relative rotation of the magnetic poles (12) and pole teeth (9) so as to be magnetic-coupled during the rotation of the high load, and wherein the output rotating means has the magnetic poles (12), a magnet (13) sandwiched between the magnetic poles (12), and a claw clutch section (14) which is engaged with the high torque input means (15) during the rotation of the high load. Conventional torque transmission devices have a problem of causing cases in which power transmission cannot be always sufficiently achieved, and the clutch capacity does not sufficiently function during a high load. Furthermore, the conventional torque transmission devices have a problem that a rotation-thrust conversion mechanism for operating a speed switching member has a hollow disk in which a permanent magnet is provided, and an output disk in which a magnet for moving the hollow disk, magnetic force for a magnetic cushion which gives return force to the hollow disk, or the like is provided, and, because the conversion mechanism, the configuration of which is complicated and the number of components of which is high in number is provided aside from a transmission body, the complicated and upsized configuration of a transmission and an increase in the number of components cause an increase in cost. |
