Patent ID: 8082817

Claim:
A gear-type power transmission mechanism comprising: a rotational shaft; a first gear spline fitted to an outer peripheral surface of the rotational shaft so as to be slidable in an axial direction of the rotational shaft; a second gear rotatably fitted to an outer peripheral surface of the rotational shaft and fixed in the axial direction; and a dog clutch for freely connecting and disconnecting power transmission between the first gear and the second gear by sliding of the first gear in the axial direction, wherein the first gear has a plurality of dog jaws on a side surface of the first gear in the axial direction and the dog jaws protrude toward the second gear, and wherein the second gear has a plurality of recess portions to which the dog jaws can be engaged, and wherein taper surfaces about a rotational axis corresponding to each other are formed at an end face of each of the dog jaws in the axial direction and each of wall surface portions formed between the recess portions.