公开(公告)号：US20220241951A1

公开(公告)日：2022-08-04

申请号：US17724202

申请日：2022-04-19

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Timothy R. Obermann ,  Douglas R. Fieldbinder ,  Alex Huber

IPC: B25F5/00 ,  H02K11/27 ,  H02P21/18 ,  H02K21/16 ,  H02P6/182

Abstract: Methods and power tools for sensorless motor control. One embodiment provides a method for automatic control switching for driving a sensorless motor (150) of a power tool (100). The method includes determining, using a motor controller (224), a first load point based on user inputs (232) and determining, using the motor controller (224), a first motor control technique corresponding to the first load point. The method also includes driving the motor (150) based on the first motor control technique. The method further includes determining, using the motor controller (224), a change from the first load point to a second load point and determining, using the motor controller (224), a second motor control technique corresponding to the second load point. The method includes driving the motor (150) based on the second motor control technique.

公开(公告)号：US20210394344A1

公开(公告)日：2021-12-23

申请号：US17350617

申请日：2021-06-17

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Gareth Mueckl ,  Maxwell L. Merget ,  Douglas R. Fieldbinder ,  Justin A. Evankovich ,  Jacob P. Schneider ,  Jonathan E. Abbott

IPC: B25B23/147 ,  B25B21/02

Abstract: A power tool including a housing, a brushless direct current (DC) motor, an impact mechanism including a hammer and an anvil, an output drive device, a position sensor, and a controller. The position sensor is adjacent to a relief feature, which may be a recessed relief feature or a raised relief feature, and is configured to generate an output signal indicative of a position of the anvil. The controller is configured to calculate a drive angle based on the determined position of the anvil, and control the brushless DC motor based on the drive angle of the anvil.

公开(公告)号：US12251800B2

公开(公告)日：2025-03-18

申请号：US17350617

申请日：2021-06-17

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Gareth Mueckl ,  Maxwell L. Merget ,  Douglas R. Fieldbinder ,  Justin A. Evankovich ,  Jacob P. Schneider ,  Jonathan E. Abbott

IPC: B25B23/147 ,  B25B21/02

Abstract: A power tool including a housing, a brushless direct current (DC) motor, an impact mechanism including a hammer and an anvil, an output drive device, a position sensor, and a controller. The position sensor is adjacent to a relief feature, which may be a recessed relief feature or a raised relief feature, and is configured to generate an output signal indicative of a position of the anvil. The controller is configured to calculate a drive angle based on the determined position of the anvil, and control the brushless DC motor based on the drive angle of the anvil.

公开(公告)号：US12194610B2

公开(公告)日：2025-01-14

申请号：US18691339

申请日：2022-09-09

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Timothy R. Obermann ,  Douglas R. Fieldbinder ,  Ian A. Duncan ,  Robert Turney

IPC: B25F5/02 ,  B25F5/00 ,  H02P6/08 ,  H02P6/30

Abstract: A power tool including a housing, an input, a gear train, a motor at least partially supported by the housing and coupled to the gear train, and a controller including a processor and a memory. The controller is coupled to the input and the motor and is configured to receive an input signal from the input, determine an operating direction and an operating speed based on the input signal, cause the motor to rotate the gear train in a direction opposite the operating direction for a predetermined amount of rotation, and cause the motor to rotate in the operating direction at the operating speed.

公开(公告)号：US20240399547A1

公开(公告)日：2024-12-05

申请号：US18800332

申请日：2024-08-12

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jacob P. Schneider ,  Maxwell l. Merget ,  Douglas R. Fieldbinder

IPC: B25B23/147 ,  B25B23/14 ,  F16D15/00 ,  F16D27/108 ,  F16D48/06

Abstract: A rotary power tool includes a gear case, an output shaft, a drive mechanism, and a clutch mechanism. The clutch mechanism including a compression spring positioned around the output shaft. The rotary power tool further includes a clutch adjustment assembly having a collar disposed circumferentially around the gear case and rotatable to adjust a length of the compression spring, an inductive sensor disposed within the collar and proximate the compression spring such that a voltage is induced in the inductive sensor in response to relative movement between the compression spring and a magnetic field emitted by the inductive sensor, and an electronic control unit configured to receive an output signal from the inductive sensor indicative of the change in inductance in the inductive sensor and to determine a parameter of the clutch mechanism based on the output signal. The compression spring is disposed adjacent and offset from the inductive sensor.

公开(公告)号：US20240333107A1

公开(公告)日：2024-10-03

申请号：US18623721

申请日：2024-04-01

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Lucas A. Rutowski ,  Maxwell L. Merget ,  Douglas R. Fieldbinder

IPC: H02K11/215 ,  H02K5/22 ,  H02K11/00 ,  H05K1/18

CPC classification number: H02K11/215 ,  H02K5/225 ,  H02K11/0094 ,  H05K1/181 ,  H05K2201/1009 ,  H05K2201/10166 ,  H05K2201/10272

Abstract: A power tool that includes a motor and a printed circuit board (“PCB”). The motor includes a rotor and a stator. The stator includes a plurality of stator terminals. The PCB is electrically connected to the stator. The PCB includes a switch and an embedded busbar. A first end of the embedded busbar is electrically connected to the switch. The embedded busbar extends away from the PCB. A second end of the embedded busbar electrically connects to a stator terminal of the plurality of stator terminals for providing power to the motor using the switch. The embedded bus bar is embedded between two layers of the printed circuit board.

公开(公告)号：US12059777B2

公开(公告)日：2024-08-13

申请号：US17398748

申请日：2021-08-10

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jacob P. Schneider ,  Maxwell L Merget ,  Douglas R. Fieldbinder

IPC: B25B23/147 ,  B25B23/14 ,  F16D15/00 ,  F16D27/108 ,  F16D48/06

CPC classification number: B25B23/147 ,  B25B23/141 ,  F16D15/00 ,  F16D27/108 ,  F16D48/06

Abstract: A rotary power tool including a gear case, an output shaft extending from the gear case, and a drive mechanism configured to provide torque to the output shaft, causing the output shaft to rotate. The rotary power tool further includes a clutch mechanism between the output shaft and the drive mechanism. The clutch mechanism includes a compression spring and is configured to limit the amount of torque provided by the output shaft. The rotary power tool further includes a sensor positioned on a neck portion of the gear case subject to strain imparted by the compression spring, and an electronic control unit configured to receive an output signal from the strain gauge and determine a torque setting of the clutch mechanism based on the output signal.

公开(公告)号：US20240186810A1

公开(公告)日：2024-06-06

申请号：US18524504

申请日：2023-11-30

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Benjamin R. Suhr ,  Douglas R. Fieldbinder

IPC: H02J7/00

CPC classification number: H02J7/0063 ,  H02J7/0044 ,  H02J7/007182 ,  H02J2207/20

Abstract: A power tool system includes a battery pack having a first voltage. The battery pack includes a power output interface, a plurality of battery cells configured to output the first voltage, and a voltage boosting circuit electrically connected to the plurality of battery cells. The voltage boosting circuit receives the first voltage and outputs a second voltage to the power output interface. The power tool system also includes a power tool. The power tool includes a motor, a power input interface configured to receive the second voltage, and a voltage reduction circuit. The voltage reduction circuit receives the second voltage from the power input interface and provides a third voltage to the motor. The power tool system further includes a power cable configured to transmit power from the power output interface of the battery pack to the power input interface of the power tool.

公开(公告)号：US20240063688A1

公开(公告)日：2024-02-22

申请号：US18451171

申请日：2023-08-17

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Douglas R. Fieldbinder ,  Nikita Bhatt

IPC: H02K7/102 ,  B25F5/00 ,  H02K7/116 ,  H02K7/14 ,  H02P3/04 ,  F16D57/00

CPC classification number: H02K7/1023 ,  B25F5/001 ,  H02K7/116 ,  H02K7/145 ,  H02P3/04 ,  F16D57/002 ,  F16H57/0495

Abstract: Systems and methods for braking a power tool motor using a magnetically susceptible fluid. One power tool includes a housing, a motor within the housing, a drive train coupled to the motor, a magnetically susceptible fluid located within the drive train, and an inductor within the housing and configured to introduce a magnetic field to the magnetically susceptible fluid. An electronic controller is connected to the motor and to the inductor and is configured to receive a signal to initiate a braking process, generate, in response to the initiation of the braking process, a control signal for the inductor, and provide the control signal to the inductor to control a viscosity of the magnetically susceptible fluid located within the drive train.

公开(公告)号：US11890741B2

公开(公告)日：2024-02-06

申请号：US17056090

申请日：2020-05-12

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Maxwell L. Merget ,  Douglas R. Fieldbinder ,  Jacob P. Schneider

IPC: B25F5/02 ,  H01H13/14 ,  H01H13/20

CPC classification number: B25F5/02 ,  H01H13/14 ,  H01H13/20

Abstract: A trigger assembly for a power tool includes a housing, a moveable plunger extending from a surface of the housing, the movable plunger includes a first end disposed externally from the housing and a second end disposed internally within the housing. The trigger assembly further includes a trigger shoe coupled to the first end of the moveable plunger, and an arm including a first side that is moveably connected to the second end of the moveably plunger and a second side that is coupled to a magnet. The trigger assembly also includes a sensor configured to sense a magnetic field of the magnet. Movement of the trigger shoe rotates the magnet, and alters the magnetic field sensed by the sensor.