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公开(公告)号：US11641043B2
公开(公告)日：2023-05-02
申请号：US17523915
申请日：2021-11-11
发明人： Chuanjun Liu , An Yan
IPC分类号： H01M50/269 , H01M50/247 , H01M50/519 , H01M50/509 , H01M50/204 , B25F5/00 , B25F5/02 , H01M10/04 , H01M10/42 , H01M10/46 , H02J7/00 , H01M50/543 , H01R13/05 , H01R13/11 , H01M50/50
摘要： The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.
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公开(公告)号：US20230124887A1
公开(公告)日：2023-04-20
申请号：US17501766
申请日：2021-10-14
IPC分类号： B25F5/00
摘要： A power tool includes a motor, a rotary disk, a belt drive connecting the motor to the rotary disk, and a reduction gear stage between the motor and the belt drive. A power tool with a ratio of an outer diameter of the drive pulley and an outer diameter of the output pulley being 0.75 to 1.33 is also provided as is a method of operating a power tool.
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公开(公告)号：US20230121902A1
公开(公告)日：2023-04-20
申请号：US17938053
申请日：2022-10-05
申请人： MAKITA CORPORATION
发明人： Tatsuo NAKASHIMA
摘要： An impact tool (1) includes: a motor (10); an impact mechanism (15), which is rotatable about an output rotational axis (BX) and is driven by the motor; an anvil (16) having an anvil shaft (113) disposed forward of the impact mechanism; and at least one anvil projection (114) protruding radially outward from a rear-end portion of the anvil shaft and configured to be impacted by the impact mechanism in a rotational direction; a hammer case (6) housing the impact mechanism; a main-body housing (2) disposed rearward of, and fixed to, the hammer case; a grip housing (3) having at least a portion disposed rearward of the main-body housing, the grip housing being coupled to the main-body housing so as to be movable relative to the main-body housing; and at least one vibration-isolating member (138, 139) disposed between the main-body housing and the grip housing.
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公开(公告)号：US11628553B2
公开(公告)日：2023-04-18
申请号：US17190115
申请日：2021-03-02
申请人： MAKITA CORPORATION
发明人： Yoshihiro Ito , Tomohiko Imae , Jun Ueda
摘要： A power tool including a rear cover simplifies assembly. A driver drill includes a motor including a stator and a rotor rotatable relative to the stator, a motor housing accommodating the motor, being cylindrical, and including a left housing and a right housing being laterally separable, a grip connected to a lower portion of the motor housing, an output unit in front of the motor and driven by the motor, and a rear cover supporting a rear portion of the rotor and closing a rear portion of the motor housing. The rear cover is held and fastened between the left housing and the right housing.
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公开(公告)号：US11621613B2
公开(公告)日：2023-04-04
申请号：US16880815
申请日：2020-05-21
发明人： Fu-Hsiang Chung , Hong Fang Chen , Wei-Ting Chen , Wei-Lin Hsu
摘要： The present invention relates to an electric motor and an electric tool equipped with the electric motor. The electric motor includes a rotor, a stator, a coil module wound around the stator, a Hall unit and a wiring circuit unit. The Hall unit includes a Hall circuit board disposed around a rotating shaft of the rotor, and a Hall module for sensing rotation of the rotor. The wiring circuit unit is independent of the Hall circuit board and includes a three-phase power source interface. The wiring circuit unit electrically connects coils of the coil module to the power source interfaces respectively by groups. By separately disposing the Hall unit and the wiring circuit unit independently, a volume of the Hall circuit board can be reduced, and an area blocking an airflow path of a heat dissipation unit can be reduced, so heat dissipation effect of the electric motor and the electric tool can be improved.
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公开(公告)号：US11611301B2
公开(公告)日：2023-03-21
申请号：US17123383
申请日：2020-12-16
申请人： Metabowerke GmbH
发明人： Benjamin Prescher
IPC分类号： H02K7/14 , H02P21/16 , H02P21/22 , B25F5/00 , G01K1/024 , G01K3/00 , G01K3/08 , G01R27/08 , G01R31/34
摘要： The invention relates to a method for operating a power tool, according to which a measuring device determines a winding resistance (RS) of a winding of an electric motor of the power tool. A test signal source applies a test signal (ip) to the winding during operation of the electric motor, a measuring unit records at least one measured value (Ud, id) as a reaction of the winding to the test signal (ip), and a control device determines the winding resistance (RS) while taking into consideration the measured value (Ud, id).
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公开(公告)号：US11607790B2
公开(公告)日：2023-03-21
申请号：US17231524
申请日：2021-04-15
发明人： Jonathan E. Abbott , Timothy R. Obermann , John S. Dey, IV , Benjamin R. Suhr , Richard A. Ryer , Maxwell L. Merget , Douglas R. Fieldbinder
摘要： Kickback control methods for power tools. One power tool includes a movement sensor configured to measure an angular velocity of the housing of the power tool about the rotational axis. The power tool includes an electronic processor coupled to the switching network and the movement sensor and configured to implement kickback control of the power tool. To implement the kickback control, the electronic processor is configured to control the switching network to drive the brushless DC motor, receive measurements of the angular velocity of the housing of the power tool from the movement sensor, determine that a plurality of the measurements of the angular velocity of the housing of the power tool exceed a rotation speed threshold, and control the switching network to cease driving of the brushless DC motor in response to determining that the plurality of the measurements of the angular velocity exceed the rotation speed threshold.
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公开(公告)号：US11607780B2
公开(公告)日：2023-03-21
申请号：US16966795
申请日：2019-02-07
申请人： MAKITA CORPORATION
发明人： Hiroki Ikuta , Shogo Tominaga
摘要： A work tool includes a housing, a spindle, a motor, a power-transmitting mechanism and a restricting member. The power-transmitting mechanism includes a sun member, a ring member, a carrier member and a planetary roller. One of the sun member and the ring member is configured to move together with the spindle in the front-rear direction relative to the other of the sun member and the ring member. The power-transmitting mechanism is configured to transmit power of the motor to the spindle when the sun member and the ring member relatively move toward each other in response to rearward movement of the spindle and the planetary roller gets into frictional contact with the sun member and the ring member. The restricting member is configured to restrict the planetary roller from moving in the front-rear direction relative to the housing.
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公开(公告)号：US11607773B2
公开(公告)日：2023-03-21
申请号：US16627651
申请日：2018-07-31
申请人： Robert Bosch GmbH
发明人： Daniel Barth
摘要： A quick clamping device for arranging at least one application tool on a power tool, in particular on an angle grinder, includes at least one output unit for moving the application tool about an output axis of the output unit, and at least one fixing unit having at least one movably mounted fixing element that is mounted, in particular in a non-removable manner, on the output unit, at least for axially fixing the application tool to the output unit. The quick clamping device has at least one securing unit, which has at least one, in particular movably mounted, securing element that is intended to secure the fixing element, which is mounted so as to be movable relative to the output unit at least about the output axis, so as to prevent the fixing element from moving about the output axis.
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公开(公告)号：US20230070284A1
公开(公告)日：2023-03-09
申请号：US17800034
申请日：2020-11-24
申请人： Apex Brands, Inc.
发明人： Michael Robert Sandy
IPC分类号： G01L25/00 , B25B23/147 , B25F5/00 , B25B21/02
摘要： An apparatus for calibrating a rotational tool includes a communications interface configured to establish a wireless communications link between a rotational tool and a calibrator to communicate one of a tool torque measurement or a calibrator torque measurement via the communications link. The apparatus may further include calibration processing circuitry configured to receive the tool torque measurement measured by a tool torque sensor, and receive the calibrator torque measurement measured by a calibrator torque sensor. The calibration processing circuitry may also be configured to compare the tool torque measurement to the calibrator torque measurement to determine a difference value, aggregate the difference value with previously determined difference values to determine an updated torque calibration factor, and cause a torque calibration factor associated with a torque sensor of the rotational tool to be automatically replaced with the updated torque calibration factor in the memory of the rotational tool.
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