Patent ID: 11923752
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 6:
7. A power tool comprising:
a brushless direct current (DC) motor having a rotor and a stator, wherein the rotor is coupled to a motor shaft to produce a rotational output, wherein the motor shaft is configured to rotate about a longitudinal axis, which extends through the motor shaft;
a transmission coupled to the motor shaft configured to be driven by the rotational output;
a combined printed circuit board (PCB) having a Hall sensor and power switching elements configured to drive the brushless DC motor,
wherein the power switching elements are mounted on the combined PCB in a flat orientation and wherein the longitudinal axis extends through the combined PCB, and
wherein the combined PCB includes a plurality of motor lead pads that each include an opening cut out from an outer peripheral edge of the combined PCB, each motor lead pad configured to receive a motor lead wire of the stator; and

a heat sink attached to an end of the brushless DC motor, wherein the heat sink includes a through-hole,
wherein the heat sink is located between the brushless DC motor and the combined PCB, and
wherein at least one of the motor lead wires passes through the heat sink such that a portion of the at least one motor lead wire that is located in a plane defined by the heat sink and perpendicular to the longitudinal axis is fully enclosed by the heat sink.