公开(公告)号：US20190356197A1

公开(公告)日：2019-11-21

申请号：US16525964

申请日：2019-07-30

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

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

IPC: H02K7/14 ,  H02K1/18 ,  H02K7/08 ,  B25F5/00 ,  H02K5/16 ,  H02K7/116 ,  H02K21/14 ,  H02K11/21 ,  H02K5/15 ,  H02K29/08

Abstract: A power tool including a housing, a controller within the housing, and a brushless motor within the housing and controlled by the controller. The brushless motor including a stator assembly including a stator core having stator laminations with an annular portion and inwardly extending stator teeth. The stator assembly defines a stator envelope in an axial direction extending between axial ends of stator end caps of the stator assembly. The brushless motor further includes a rotor assembly including a rotor core having rotor laminations and defining a central aperture that extends in the axial direction and that receives a shaft, and a position sensor board assembly including position sensors and configured to provide position information of the rotor core to the controller. The rotor assembly and the position sensor board assembly are provided at least partially within the stator envelope.

公开(公告)号：US10432065B2

公开(公告)日：2019-10-01

申请号：US16242536

申请日：2019-01-08

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

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

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

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：US20190296608A1

公开(公告)日：2019-09-26

申请号：US16388422

申请日：2019-04-18

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Matthew J. Mergener ,  Michael Kolden ,  William E. Check ,  Matthew P. Wycklendt ,  Andrew T. Beyerl ,  John W. Thiele ,  Todd C. Hunkins

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

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.

公开(公告)号：US20160359151A1

公开(公告)日：2016-12-08

申请号：US15173007

申请日：2016-06-03

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).

Abstract translation: 可由电动工具（例如，手持式电动工具）连接并可支撑的电池组。 电池组包括具有支撑构件的顶部壳体。 电池组顶部壳体的支撑构件被构造或可操作以加强用于将电池组连接到电动工具的电池组的支撑部分。 通过加强电池组的支撑部分，电池组和电动工具之间的界面能够承受更大的力（例如，来自由电动工具引起的振动）。

公开(公告)号：US20250119003A1

公开(公告)日：2025-04-10

申请号：US18982771

申请日：2024-12-16

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Derek J. Schwab ,  Samantha L. Billetdeaux ,  Kyle Greunke ,  Hans T. Banholzer ,  Carmen J. Castanos

IPC: H02K1/18 ,  B23D51/16 ,  B25F5/00 ,  H02K5/16 ,  H02K7/08 ,  H02K7/14 ,  H02K9/22 ,  H02K11/33 ,  H02K21/16

Abstract: An electric motor assembly includes a circuit board, a rotor assembly, and a stator assembly having a first end coupled to the circuit board and a second end opposite the first end. The stator assembly also includes an annular stator body having a plurality of inwardly projecting teeth. The stator assembly further includes windings wrapped about the stator body to form a plurality of coils. The stator assembly also includes a terminal coupled to an outer periphery of the stator body and extending longitudinally between the first end and the second end. The terminal is coupled to the circuit board at the first end and is coupled to the windings at the second end to electrically connect the windings to the circuit board. The terminal is molded to an attachment member, and the attachment member is molded to the outer periphery of the stator body.

公开(公告)号：US12191710B2

公开(公告)日：2025-01-07

申请号：US18366378

申请日：2023-08-07

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl ,  Derek J. Schwab ,  Samantha L. Billetdeaux ,  Kyle Greunke ,  Hans T. Banholzer ,  Carmen J. Castanos

IPC: H02K1/18 ,  B25F5/00 ,  H02K5/16 ,  H02K7/08 ,  H02K7/14 ,  H02K9/22 ,  H02K11/33 ,  H02K21/16 ,  B23D51/16

Abstract: An electric motor assembly includes a circuit board, a rotor assembly, and a stator assembly having a first end coupled to the circuit board and a second end opposite the first end. The stator assembly also includes an annular stator body having a plurality of inwardly projecting teeth. The stator assembly further includes windings wrapped about the stator body to form a plurality of coils. The stator assembly also includes a terminal coupled to an outer periphery of the stator body and extending longitudinally between the first end and the second end. The terminal is coupled to the circuit board at the first end and is coupled to the windings at the second end to electrically connect the windings to the circuit board. The terminal is molded to an attachment member, and the attachment member is molded to the outer periphery of the stator body.

公开(公告)号：US20240413706A1

公开(公告)日：2024-12-12

申请号：US18808266

申请日：2024-08-19

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

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

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

Abstract: A brushless DC motor for use with a power tool includes a stator surrounding a rotor, an output shaft with first and second ends that is fixed to the rotor to transmit movement of the rotor to the output shaft, first and second bearings positioned on the output shaft adjacent the first and second ends, a fan coupled to the output shaft between the first and second bearings to rotate with the output shaft relative to the stator, and a brass bushing with an outer diameter coupled to the output shaft and positioned between the first and second bearings closer to the first bearing than to the second bearing. A hub portion of the fan is coupled to the output shaft and fins extend radially outward away from the hub portion. An outer diameter of the brass bushing is less than the outer diameter of the hub portion.

公开(公告)号：US12095343B2

公开(公告)日：2024-09-17

申请号：US17883428

申请日：2022-08-08

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

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

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

CPC classification number: H02K7/145 ,  B25F5/006 ,  H02K7/04 ,  H02K9/06

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：US12081104B2

公开(公告)日：2024-09-03

申请号：US18476810

申请日：2023-09-28

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Andrew T. Beyerl

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

CPC classification number: H02K7/145 ,  B23B45/02 ,  B25B21/00 ,  B25F5/008 ,  H02K3/522 ,  H02K11/33 ,  H02K29/08 ,  H02K2203/06

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：US20240186845A1

公开(公告)日：2024-06-06

申请号：US18525279

申请日：2023-11-30

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jacob G. Wood ,  Carter H. Ypma ,  Jordan P. Gilsinger ,  Christopher J. Kujawski ,  Ryan Buttke ,  Andrew T. Beyerl ,  Linnea Emerson ,  Matthew R. Bailey ,  Jeffrey C. Hessenberger

IPC: H02K1/18 ,  H02K7/08 ,  H02K7/14 ,  H02K11/21

CPC classification number: H02K1/18 ,  H02K7/083 ,  H02K7/145 ,  H02K11/21 ,  H02K2211/03

Abstract: An electric motor includes a rotor assembly including a rotor shaft, a rotor body fixedly coupled to the rotor shaft, and a plurality of magnets coupled to the rotor body. The electric motor also includes a stator assembly at least partially received within the rotor body. The stator assembly includes a stator mount including a stator support portion and a motor support portion. The stator assembly also includes a stator core assembly fixedly supported by the stator mount, the stator core assembly defining a central bore that receives the rotor shaft and the stator support portion. The electric motor also includes a bearing having an outer race and an inner race, the outer race being supported by the stator core assembly, and the inner race supporting the rotor shaft for rotation relative to the stator assembly. The stator core assembly further defines a bearing pocket adjacent to the central bore.