Patent ID: 6708806
Filing Date: 2004-03-23
Classification: F16D

Abstract:
A power transmission apparatus comprising:a sub-clutch apparatus connected to an input shaft, arranged between an electromagnet and an armature and operating accordingly to a pressing motion applied by the armature attracted due to an excitation of the electromagnet so as to frictionally engage; a main clutch apparatus arranged between the input shaft and an output shaft, the main clutch apparatus having a clutch pack being frictionally engageable due to a pressing force, thereby executing a torque transmission between the input shaft and the output shaft; and a cam apparatus having a rolling member wherein the rolling member is disposed at a substantially equal radial distance as the clutch pack with respect to the axis of rotation of the input and output shafts converting a frictional engagement force of the sub-clutch apparatus into the pressing force for the main clutch apparatus, whereby the torque transmission is executed between the input shaft and the output shaft, said main clutch and said cam apparatus are substantially axially arranged; wherein the electromagnet is arranged in an inner diameter side of the main clutch apparatus.