Brushless motor and electric-powered tool
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United States of America Patent
Stats
-
Jul 19, 2016
Grant Date -
Mar 27, 2014
app pub date -
Aug 5, 2013
filing date -
Sep 26, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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