| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a drive force transmission device capable of suppressing the drag torque of a main clutch by suppressing the drag torque of a pilot clutch. <P>SOLUTION: This drive force transmission device stores the main clutch, a cam mechanism, and the pilot clutch between the inner peripheral wall surface of a housing and the outer peripheral wall surface of an inner shaft. Pilot outer clutch plates forming the pilot clutch are engaged with the inner peripheral wall surface of the housing movably in the axial direction. Pilot inner clutch plates forming the pilot clutch are disposed alternately to the pilot outer clutch plates and engaged with the outer peripheral wall surface of a first cam member movably in the axial direction. A plurality of oil grooves 21e extending from the inner peripheral end and terminated before arriving at the outer peripheral end thereof are formed in both front and rear frictional parts of the outer annular parts 21a of the pilot outer clutch plates 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
