| 摘要 |
For supporting, between a pair of arms 20L and 20R with a wheel axle 21, a wheel 30 provided therein with a motor 40 having a stator 41 and a rotor 42 and equipped with a fixed-side member 60 supporting the stator 41 and a rotative-side member receiving rotation transmitted from the rotor 42, there is provided, at an axle 22 rotatively supporting the rotor 42 and the rotative-side member 31, an engaging part 22p for engagement with the fixed-side member 60 to position the center of rotation of the rotative-side member with respect to the fixed-side member 60, wherein integration of the fixed-side member 60 and the rotative-side member 31 into a unit by engagement of the engaging part 22p with the fixed-side member 60 is adapted to allow the axle 22 to be positioned with respect to the fixed-side member 60 in order that the centers of holes in the axle and the fixed-side member for insertion of the wheel axle 21 will be in alignment, and consequently, operation of incorporating the unit U (i.e.,thewheel30) in between the pair of arms 20L and 20R becomes facilitated. |
