Brushless motor and electric-powered tool

摘要

In a brushless motor, a rotor core is fixed to a shaft. Through holes are formed in the rotor core, and permanent magnets are inserted to be fixed in place in the through holes. A stator core is fixed to an outer circumferential surface of the rotor core such that the stator core faces the outer circumferential surface of the rotor core. Stator coils are provided on the stator core via insulators so as to configure magnetic flux generating portions. A cooling fan is provided in front of a stator which is configured by the stator core and the stator coils. Axial position of blades of the fan and axial positions of the rotor core and the permanent magnets partially overlap each other in their positions.

主权项

1. A brushless motor comprising:
a shaft; a rotor provided on an outer circumference of the shaft; a stator having a magnetic flux generating portion which faces an outer circumferential surface of the rotor; and a fan configured to rotate together with the shaft at one end in an axial direction of the stator, wherein an axial position of a blade of the fan and an axial position of a permanent magnet of the rotor partially overlap each other.