公开(公告)号：US20210384793A1

公开(公告)日：2021-12-09

申请号：US17338791

申请日：2021-06-04

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Matthew R. Bailey ,  Keith M. Klosterman ,  Keith Boulanger ,  Jeffrey C. Hessenberger ,  Andrew T. Beyerl ,  Gerald A. Zucca

IPC: H02K3/52 ,  H02K7/08 ,  H02K7/14 ,  H02K11/00 ,  H02K11/215 ,  H02K21/16

Abstract: Power tools described herein include a housing, a brushless direct current (DC) motor, a non-conductive terminal mount, and a plurality of terminals. The housing has a motor housing portion, a handle portion, and a battery pack interface. The brushless DC motor is located within the motor housing portion and has a rotor and a stator. The non-conductive terminal mount is located on an outer peripheral surface of the stator and includes an angled surface. The angled surface is not substantially parallel to a longitudinal axis of the motor. The plurality of terminals is mounted on the angled surface of the terminal mount. Each of the terminals is angled in a first direction such that the terminals are not substantially parallel to the longitudinal axis of the motor.

公开(公告)号：US11114927B2

公开(公告)日：2021-09-07

申请号：US17095484

申请日：2020-11-11

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Keith Boulanger ,  Matthew R. Bailey ,  Carl B. Westerby

IPC: H02K23/02 ,  H02K3/12 ,  H02K3/34 ,  H02K11/33 ,  H02K11/215 ,  H02K7/14 ,  H02K29/08 ,  H05K1/02 ,  H02K1/14 ,  H02K9/00

Abstract: A brushless electric motor includes a stator and a rotor. The stator includes a core defining a plurality of stator teeth, a first end cap proximate a first end of the core, a second end cap proximate a second end of the core, and a plurality of coils disposed on the respective stator teeth. The stator also includes a plurality of coil contact plates overmolded within one of the first end cap or the second end cap that short-circuit diagonally opposite coils on the stator.

公开(公告)号：US20200266684A1

公开(公告)日：2020-08-20

申请号：US16866355

申请日：2020-05-04

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jeffrey C. Hessenberger ,  Michael Kolden ,  Andrew T. Beyerl

IPC: H02K7/14 ,  H02K9/06 ,  H02K7/04 ,  B25F5/00

Abstract: A power tool includes a housing, a battery connection portion supported by the housing, a drive mechanism configured to operate a working element, and a brushless DC motor positioned within the housing and connected to the drive mechanism. The motor includes a rotor, stator surrounding the motor, and an output shaft fixed to the rotor such that movement of the rotor is transmitted to the output shaft. The motor also includes a fan coupled to the output shaft to rotate with the output shaft and the rotor, and a brass bushing fixed to the output shaft to rotate with the rotor and the output shaft relative to the stator. The bushing includes a balancing feature.

公开(公告)号：US20200177034A1

公开(公告)日：2020-06-04

申请号：US16698293

申请日：2019-11-27

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Derek J. Schwab

IPC: H02K1/17 ,  H02K15/12 ,  H02K3/28

Abstract: An electric motor includes a stator assembly including a lamination stack, a printed circuit board assembly (PCBA), and a plurality of windings. The PCBA is coupled to the lamination stack at a first axial end of the stator assembly. The windings are wrapped about the lamination stack to form coils. Each winding includes crossover portions extending about a portion of a circumference of the stator assembly to connect pairs of opposite coils. The crossover portions are located at a second axial end of the stator assembly opposite the first axial end.

公开(公告)号：US20190280559A1

公开(公告)日：2019-09-12

申请号：US16422337

申请日：2019-05-24

Applicant: Milwaukee Electric Tool Corporation

Inventor： Andrew T. Beyerl

IPC: H02K7/14 ,  H02K11/33 ,  B25F5/00 ,  H02K3/52 ,  B23B45/02 ,  H02K29/08 ,  B25B21/00

Abstract: A power tool with a combined printed circuit board (PCB) having a doughnut shape and located coaxially with a motor shaft. The combined PCB is secured to a heat sink on one end of the motor and a metal end piece is positioned on an opposite end of the motor. The metal end cap and heat sink are secured to one another via fasteners to provide a rigid coupling. A tabbed end piece is provided between the heat sink and the motor stator and is also secured into place via the fasteners. The tabbed end piece includes wire support tabs that provide strain relief to motor coil leads. The wire support tabs extend axially from circumferential locations of the tabbed end piece and include channels to guide the motor coil leads to solder contact points on the combined PCB.

公开(公告)号：US10249854B2

公开(公告)日：2019-04-02

申请号：US16106836

申请日：2018-08-21

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Michael Kolden ,  Troy C. Thorson ,  Jeffrey M. Wackwitz ,  Jeffrey S. Holly

IPC: H01M2/10

Abstract: A battery pack that is connectable to and supportable by a power tool (e.g., a hand-held power tool). The battery pack includes a top housing having a support member. The support member of the battery pack top housing is configured or operable to reinforce a support portion of the battery pack that is used to connect the battery pack to the power tool. By reinforcing the support portion of the battery pack, an interface between the battery pack and the power tool is able to withstand greater forces (e.g., from vibrations caused by the power tool).

公开(公告)号：US10205365B2

公开(公告)日：2019-02-12

申请号：US15474358

申请日：2017-03-30

Applicant: Milwaukee Electric Tool Corporation

Inventor： Andrew T. Beyerl ,  Keith Boulanger ,  Alex Huber ,  William A. Elger ,  Jeffrey M. Wackwitz

IPC: H02K7/14 ,  H02K11/21 ,  B25F5/00 ,  H02K1/18 ,  H02K5/16 ,  H02K7/08 ,  H02K7/116 ,  H02K21/14 ,  H02K29/08

Abstract: A brushless direct current motor for a power tool. The motor includes a stator assembly including a stator core having stator laminations with an annular portion and inwardly extending stator teeth. The motor also includes a rotor assembly including a rotor core having rotor laminations and defining a central aperture that receives an output shaft. The rotor assembly also includes a rotor end cap on a first side of the rotor core having a bearing holder and defining a channel, wherein the channel is open on a side of the rotor end cap facing the rotor core. The motor further includes a bearing provided in the bearing holder that couples the rotor end cap to the output shaft and a position sensor board assembly provided in the channel of the rotor end cap and configured to provide position information of the rotor core to a motor controller.

公开(公告)号：US20180358589A1

公开(公告)日：2018-12-13

申请号：US16106836

申请日：2018-08-21

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Michael Kolden ,  Troy C. Thorson ,  Jeffrey M. Wackwitz ,  Jeffrey S. Holly

IPC: H01M2/10

CPC classification number: H01M2/1055 ,  H01M2/1022 ,  H01M2/1066 ,  H01M2220/30

Abstract: A battery pack that is connectable to and supportable by a power tool (e.g., a hand-held power tool). The battery pack includes a top housing having a support member. The support member of the battery pack top housing is configured or operable to reinforce a support portion of the battery pack that is used to connect the battery pack to the power tool. By reinforcing the support portion of the battery pack, an interface between the battery pack and the power tool is able to withstand greater forces (e.g., from vibrations caused by the power tool).

公开(公告)号：US20180262092A1

公开(公告)日：2018-09-13

申请号：US15894386

申请日：2018-02-12

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Keith Boulanger ,  Matthew R. Bailey ,  Carl B. Westerby

IPC: H02K23/02 ,  H02K3/12 ,  H02K3/34 ,  H02K7/14 ,  H02K11/33 ,  H02K11/215

CPC classification number: H02K23/023 ,  H02K1/146 ,  H02K3/12 ,  H02K3/345 ,  H02K7/145 ,  H02K9/00 ,  H02K11/215 ,  H02K11/33 ,  H02K29/08 ,  H02K2211/03 ,  H05K1/02

Abstract: A brushless electric motor includes a stator and a rotor. The stator includes a core defining a plurality of stator teeth, a first end cap proximate a first end of the core, a second end cap proximate a second end of the core, and a plurality of coils disposed on the respective stator teeth. The stator also includes a plurality of coil contact plates overmolded within one of the first end cap or the second end cap that short-circuit diagonally opposite coils on the stator.

公开(公告)号：US09960656B2

公开(公告)日：2018-05-01

申请号：US15241475

申请日：2016-08-19

Applicant: Milwaukee Electric Tool Corporation

Inventor： Matthew J. Mergener ,  Michael Kolden ,  William E. Check ,  Matthew P. Wycklendt ,  Andrew T. Beyerl

IPC: H02K7/00 ,  H02K7/14 ,  H02K11/215 ,  B25B21/02 ,  B25F5/00 ,  H02K11/33 ,  H02K11/38 ,  H02K5/04 ,  H02K9/06 ,  H02K21/04 ,  H02K29/08 ,  H05K1/02 ,  H05K1/11 ,  H05K1/18 ,  H05K7/20

CPC classification number: H02K7/145 ,  B25B21/02 ,  B25F5/00 ,  B25F5/008 ,  H02K5/04 ,  H02K9/06 ,  H02K11/215 ,  H02K11/33 ,  H02K11/38 ,  H02K21/046 ,  H02K29/08 ,  H02K2211/03 ,  H05K1/0203 ,  H05K1/113 ,  H05K1/18 ,  H05K7/20136 ,  H05K7/20436 ,  H05K2201/10053 ,  H05K2201/10151

Abstract: A power tool with a combined printed circuit board (PCB) that reduces internal wiring of the power tool and provides a large amount of air flow to internal components. In some instances, the combined PCB has a surfboard shape and includes a motor control unit and power switching elements (Field Effect Transistors or FETs). The combined surfboard PCB is located above the trigger, but below the motor and drive mechanism. In other instances, the combined PCB has a doughnut shape and is located coaxially with a motor shaft. The combined PCB may be positioned between a doughnut-shaped control PCB and the motor.