| 摘要 |
PROBLEM TO BE SOLVED: To provide a power transmission device reduced in friction produced between a gear and a support member for supporting the end face of the gear in power transmission devices each with a plurality of gears.SOLUTION: In a power transmission device, a pinion gear 4e rotates in a first rotation direction when a vehicle moves forward; a gear tooth 22 is formed to approach the second end face 29b side as it approaches the first rotation direction when the gear tooth 22 is viewed from a location apart from the circumferential surface of the pinion gear 4e; a first support part contains a first support plate 30 for supporting a first end face 29a, a second support plate disposed apart from the first support plate 30 in a pinion shaft extended direction, and a plurality of rotating members disposed between the first support plate 30 and the second support plate 36 and relatively rotatably supporting with the first support plate 30 and the second support plate 36; and a second support part is a plated member. |
