| 摘要 |
A hub shaft (25) is inserted into a through hole (40) formed on a hub body (26), and a rotation shaft (35) of a motor (27) and the hub body (26) move together via a deceleration mechanism (45). The deceleration mechanism (45) comprises a sun gear (46) formed on the rotation shaft (35), an annular gear (47) disposed inside the hub body (26), and a planetary gear (48) that meshes with the sun gear (46) and the annular gear (47). A support member (50) that supports the planetary gear (48) is disposed on the motor (27). The support member (50) has a recess (54) facing the through hole (40) in the direction of the axis (28) of the hub shaft (25), and a bearing member (59) that rotatably receives the hub body (26) is fitted inside the recess (54) of the support member (50). |
