| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction transmission device and a driving force distribution device using the same, capable of restraining reduction in durability of a roller friction surface, by minimizing deformation of a contact surface with a first roller of a second roller. SOLUTION: This friction transmission device includes the first roller 31 and the second roller 32, bearing supports 23 and 25 for receiving reaction generated by pressing contact in the radial direction between the rollers, crankshafts 51L and 51R having a rotary shaft offset to an output shaft 13 being a rotary shaft of the second roller 32, a pair of bearings 52L and 52R for supporting the output shaft 13 by the crankshafts 51L and 51R, a pair of bearings 53L and 53R for supporting eccentric outer peripheral parts 51Lb and 51Rb being the rotary shaft of the crankshafts 51L and 51R by the bearing supports 23 and 25, and an inter-roller pressing force control motor 45 for changing a pressing contact state in the radial direction between the rollers by rotating the crankshafts 51L and 51R. The length W1 in the axial direction of the bearings 52L and 52R is set longer than the length W2 in the axial direction of the bearings 53L and 53R. COPYRIGHT: (C)2010,JPO&INPIT
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