| 摘要 |
<P>PROBLEM TO BE SOLVED: To simplify a control system of transmission regulation of rotary torque. <P>SOLUTION: The power transmission device includes: a differential gear case 47; an externally controlled electric motor 23; a clutch 29 for transmitting the rotary torque in response to the coupling between both plates; a pressing plate 45 for fastening the clutch 29 by fastening transfer as well as being rotatable relative to an output side cam plate 67 of the electric motor 23 in linking with a clutch housing 69; and a one-way cam mechanism 27 for transmitting the rotary torque of the electric motor 23 to the pressing plate 45 as well as fastening and transferring the pressing plate 45 by generating thrust force according to the relative rotation between the pressing plate 45 and a cam plate 67. When a revolution speed of the cam plate 67 exceeds that of the pressing plate 45, the one-way cam mechanism 27 generates the thrust force, while when the revolution speed of the cam plate 67 is less than that of the pressing plate 45, the one-way cam mechanism 27 releases the thrust force. <P>COPYRIGHT: (C)2012,JPO&INPIT |
