POWER TRANSMISSION DEVICE

PROBLEM TO BE SOLVED: To provide a power transmission device capable of eliminating dragging loss by a synchronizer ring.SOLUTION: A power transmission device 1 includes: a rotary shaft 2 having a spline 5; a gear member 3 disposed coaxially with the rotary shaft 2 and having a first tooth part 6; and a rotation absorption mechanism 4 which rotates integrally with the rotary shaft 2, which is disposed on the spline 5 so as to become movable in the axial direction of the rotary shaft 2, and in which, when engaged with the first tooth part 6 of the gear member 3 by the movement in the axial direction, the gear member 3 performs integral rotation with the rotary shaft 2. The rotation absorption mechanism 4 includes: a sleeve member 8 for rotating integrally with the rotary shaft 2; a movement member 9 for moving the sleeve member 8 in the axial direction; and a friction member 10 disposed between the movement member 9 and the sleeve member 8 so as to be frictionally engaged with the sleeve member 8, and for absorbing a rotational difference between the rotary shaft 2 and the gear member 3 by friction when relatively rotating with the sleeve member 8.SELECTED DRAWING: Figure 1 【課題】 シンクロナイザリングによる引き摺り損失をなくすことのできる動力伝達装置を提供する。【解決手段】 動力伝達装置１は、スプライン５を有する回転軸２と、回転軸２と同軸上に配設され、第１歯部６を有するギヤ部材３と、回転軸２と一体回転するとともに回転軸２の軸方向に移動自在となるようにスプライン５上に配設され、軸方向への移動によりギヤ部材３の第１歯部６に噛み合うと、ギヤ部材３が回転軸２と一体回転を行う回転吸収機構４を備える。回転吸収機構４は、回転軸２と一体回転するスリーブ部材８と、スリーブ部材８を軸方向に移動させる移動部材９と、スリーブ部材８と摩擦係合するように移動部材９とスリーブ部材８との間に配設され、スリーブ部材８と相対回転するときに、回転軸２とギヤ部材３との回転差を摩擦により吸収する摩擦部材１０を備える。【選択図】 図１