Brushless direct current motor for power tools
AssigneeMilwaukee Electric Tool Corporation
InventorsAndrew T. Beyerl, Keith Boulanger, Matthew R. Bailey, Carl B. Westerby
Life of this patent
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Abstract
A motor assembly for use with a power tool includes a motor housing, a brushless electric motor disposed at least partially in the motor housing, and a PCB assembly coupled to the motor housing. The PCB assembly includes a heat sink, a power PCB coupled to a first side of the heat sink, and a position sensor PCB coupled to a second side of the heat sink opposite the first side and in facing relationship with the motor.
Claims20
A motor assembly for use with a power tool, the motor assembly comprising:
- a motor housing;
- a brushless electric motor disposed at least partially in the motor housing;
- and
- a PCB assembly coupled to the motor housing, the PCB assembly including
- a heat sink,
- a power PCB coupled to a first side of the heat sink, and
- a position sensor PCB coupled to a second side of the heat sink opposite the first side and in facing relationship with the motor,
- wherein the heat sink includes a plurality of holes aligned with respective holes formed in the power PCB, and
- wherein the brushless electric motor includes coil contact plates with terminals that extend through the holes in the heat sink to electrically connect to the power PCB.
A motor assembly for use with a power tool, the motor assembly comprising:
- a motor housing;
- a brushless electric motor disposed at least partially in the motor housing;
- and
- a PCB assembly coupled to the motor housing, the PCB assembly including
- a heat sink,
- a power PCB coupled to a first side of the heat sink, and
- a position sensor PCB coupled to a second side of the heat sink opposite the first side and in facing relationship with the motor,
- wherein the heat sink includes a recess, and wherein the position sensor PCB is received within the recess,
- wherein the heat sink includes a plurality of holes aligned with respective holes formed in the power PCB, and
- wherein the heat sink includes a plurality of tracks extending between the recess and the holes.
Dependencies are inferred from the claim text.