| 摘要 |
There is provided a brushless motor including (1) a motor shaft, (2) an insulator that includes a ring-shaped insulating portion covering the ring-shaped unit, (3) a centerpiece that includes a main body section that supports the motor shaft, (4) a first water stopping wall that is formed in a ring shape along the circumferential direction of the motor shaft, and that extends along the axial direction of the motor shaft from the ring-shaped insulating portion toward the main body section, and (5) a second water stopping wall that is formed in a ring shape along the circumferential direction of the motor shaft, that extends out along the axial direction of the motor shaft from the main body section toward the ring-shaped insulating portion, and that, together with the first water stopping wall, configures a labyrinth structure. |
| 主权项 |
1. A brushless motor comprising:
a motor shaft; a rotor housing including a circular cylinder-shaped shaft bearing housing section provided at the radial direction outside of the motor shaft, and an outer cylinder section formed at the radial direction outside of the shaft bearing housing section; a shaft bearing that is housed in the shaft bearing housing section, and that is assembled to the motor shaft; a stator core that includes a ring-shaped unit provided at the radial direction outside of the shaft bearing housing section, and a plurality of teeth formed in a radiating pattern at the periphery of the ring-shaped unit, and that is housed inside the outer cylinder section; an insulator that includes a ring-shaped insulating portion covering the ring-shaped unit, and a plurality of teeth insulating portions respectively covering the plurality of teeth; a plurality of winding coil portions wound around the teeth and over the teeth insulating portions; a centerpiece that includes a main body section disposed facing an opening of the outer cylinder section, and that supports the motor shaft and the stator core; a first water stopping wall that is formed in a ring shape along the circumferential direction of the motor shaft, and that extends along an axial direction of the motor shaft from the ring-shaped insulating portion toward the main body section; and a second water stopping wall that is formed in a ring shape along the circumferential direction of the motor shaft, that extends out along the axial direction of the motor shaft from the main body section toward the ring-shaped insulating portion, and that, together with the first water stopping wall, configures a labyrinth structure positioned at a radial direction inside of the plurality of winding coil portions. |
