POWER TRANSMISSION MECHANISM OF SHAFT AND HUB

摘要

A power transmission mechanism of a shaft and a hub, wherein a shaft tooth part (22) comprises a ridge part (22a) formed of a crowning with varied tooth thickness, and a hub tooth part (28) comprises a ridge part (28a) having tooth thickness formed in a specified linear shape and having an inner diameter varying from the end part thereof to a shaft shank (24) side. A first step part (30) swelling to the hub tooth part (28) is formed in the bottom part (22b) of the shaft tooth part (22), and a second step part (32) recessed in a direction opposite to the shaft tooth part (22) is formed in the ridge part (28a) of the hub tooth part (28). The start point (P1) of the first step part (30) and the start point (P2) of the second step part (32) are set at positions offset by a specified distance (L4) from each other.