Patent ID: 6951521
Filing Date: 2005-10-04
Classification: F16D,F16H

Abstract:
1. A transmission actuator comprising: a torque generating mechanism including, a rotor provided on an outer circumferential surface of a drive shaft and a stator provided on a transmission case; a speed reduction mechanism disposed on either an input shaft or an output shaft for multiplying a torque from the torque generating mechanism; a motion direction changing mechanism comprising, two rotational elements adapted for converting a torque multiplied by a cam mechanism provided between confronting faces of a pair of externally toothed gears which constitute the speed reduction mechanism into a thrust and having provided on outer circumferential surfaces thereof the externally toothed gears to which the torque from the speed reduction mechanism is transmitted; and a friction engagement mechanism provided on the input shaft and the output shaft so as to be brought into engagement by virtue of a thrust generated by the motion direction changing mechanism to thereby transmit a power from the input shaft to the output shaft, wherein the drive shaft is made hollow so that the input shaft or the output shaft is disposed in a hollow portion of the drive shaft.