| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque transmission device of a four-wheel drive vehicle which can properly transmit torque to sub-drive wheels according to a traveling state of the vehicle by a simple constitution.SOLUTION: A speed increase type planetary gear mechanism (30) and a torque transmission part (40) having a constitution in which a plurality of plates (friction plates) are alternately laminated in a working chamber (16) which is filled with a working fluid are arranged in series toward a drive wheel (W3, W4) side from an engine (3) side in a housing (11), an inner member (25) having an inertial mass is arranged between the planetary gear mechanism (30) and the torque transmission part (40), and rotation which is speed-increased by the planetary gear mechanism (30) with respect to input rotation to the housing (11) is inputted to the torque transmission part (40). High torque can be outputted even if using a low-viscosity working fluid as a working fluid of the torque transmission part (40), and by reducing generation torque in a state that a differential motion is low, drag torque can be suppressed.SELECTED DRAWING: Figure 2 |
