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公开(公告)号：US20240261933A1
公开(公告)日：2024-08-08
申请号：US18435633
申请日：2024-02-07
发明人： Wesley S. Bassindale , Alexander C. Ghouse , Terry L. Timmons , Dane Laitinen , Erik A. Freeberg
CPC分类号： B24B55/052 , B24B23/028
摘要： An angle grinder includes an output shaft defining a rotational axis, a housing from which the output shaft extends, and a flange coupled to the housing and surrounding the output shaft. The angle grinder further includes a first circumferential groove defined between the flange and the housing, a first array of radially outward-extending slots in the flange and in communication with the first circumferential groove, and a keyway defined in the housing. The keyway is positioned inline with a first of the radially outward-extending slots in the first array. The angle grinder further includes a guard with a second array of radially inward-extending projections and a key positionable within the keyway. The radially inward-extending projections are received in the radially outward-extending slots. The key is able to close the first radially outward-extending slot in the first array to prevent removal of the guard from the housing.
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公开(公告)号：US20240213849A1
公开(公告)日：2024-06-27
申请号：US18523056
申请日：2023-11-29
申请人： Black & Decker Inc.
IPC分类号： H02K7/14 , B24B23/02 , H02K1/2733 , H02K1/276 , H02K9/06
CPC分类号： H02K7/145 , B24B23/028 , H02K1/2733 , H02K1/2766 , H02K9/06
摘要： An electric hand-held power tool can include a motor shaft that includes an input portion that is configured to couple to a motor of the electric hand-held power tool and includes an output portion that is rigidly coupled to the input portion of the motor shaft. A magnetic transmission can be concentrically surrounding the motor shaft between the input portion of the motor shaft and the output portion of the motor shaft, to form a motor shaft channel through the magnetic transmission through which the motor shaft extends from the input portion of the motor shaft to the output portion of the motor shaft.
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公开(公告)号：US12017324B2
公开(公告)日：2024-06-25
申请号：US16341295
申请日：2017-10-04
申请人： Robert Bosch GmbH
发明人： Andreas Zurbruegg
CPC分类号： B24B45/006 , B24B23/028
摘要： A quick clamping device for a portable machine tool, in particular an angle grinder, includes at least one output shaft, at least one clamping unit, at least one operating unit, and at least one securing unit. The clamping unit, for the purpose of fixing an insert bit to the output shaft without using tools, includes at least one clamping element for applying a clamping force to the bit in a clamping position. The operating unit moves the clamping element into the clamping position and/or into a release position in which the insert bit can be removed from the clamping unit and/or the output shaft. The securing unit is designed to prevent movement of the clamping element from the clamping position into the release position at least under the action of a force decoupled from the operating unit and acting on the clamping element in the direction of the release position.
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公开(公告)号：US20240157500A1
公开(公告)日：2024-05-16
申请号：US18244651
申请日：2023-09-11
申请人： MAKITA CORPORATION
发明人： Fumitoshi NUMATA
IPC分类号： B24B23/02
CPC分类号： B24B23/028
摘要： A power tool includes a brake assembly including a swing member swingable about a pivot at an axial center decentered from a center of a brake member, a press member held by the swing member to come in contact with the brake member in response to the swing member swinging, and a spring having an axial center at a second decentered position opposite to the pivot with the center of the brake member between the axial center and the pivot. The axial center is on a second line orthogonal to a first line extending through the center of the brake member and the pivot. The spring has an elastic movable end in contact with an end of the swing member to urge the swing member to a position at which the press member is in contact with the brake member with a switch being in an off state.
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公开(公告)号：US11938587B2
公开(公告)日：2024-03-26
申请号：US16402406
申请日：2019-05-03
发明人： Guoming Tong , Xiang Zhao , Shaojun Wang
CPC分类号： B24B55/052 , B24B23/028
摘要： An angle grinder includes a housing, an output shaft at least partially extending out of the housing and being rotatable about a first axis relative to the housing, a sleeve fixedly connected to the housing, a first shield surrounding the output shaft and detachably connected to the sleeve, a second shield surrounding at least a part of the first shield and detachably connected to the first shield, and a connector configured for connecting the second shield to the first shield. The second shield is formed or connected with a mounting element for cooperating with the connector, and the connector and the mounting element are separately formed.
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公开(公告)号：US11890720B2
公开(公告)日：2024-02-06
申请号：US16341429
申请日：2017-10-04
申请人： Robert Bosch GmbH
发明人： Bruno Luescher , Andreas Zurbruegg
CPC分类号： B24B45/006 , B23B31/18 , B24B23/028
摘要： A quick clamping device for a portable power tool includes at least one rotatably drivable output shaft, at least one clamping unit, at least one operating unit, and at least one uncoupling unit. The clamping unit, for tool-free fastening of an insert tool unit to the output shaft, includes at least one movably mounted clamping element for applying clamping force to the insert tool unit in a clamping position of the clamping element. The operating unit is configured to move the clamping element into the clamping position and/or into a release position of the clamping element. In the release position, the insert tool unit can be removed from the clamping unit. The at least one uncoupling unit is configured to uncouple the operating unit from the clamping unit in accordance with the rotational speed of the output shaft.
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公开(公告)号：US20240025005A1
公开(公告)日：2024-01-25
申请号：US18376153
申请日：2023-10-03
申请人： Guido VALENTINI
发明人： Guido VALENTINI
IPC分类号： B24B23/02
CPC分类号： B24B23/028
摘要： The invention refers to a hand-held and hand-guided random orbital polishing or sanding power tool (1). The tool (1) comprises a static body (31), a motor (15), an eccentric element (17) driven by the motor (15) and performing a rotational movement about a first rotational axis (10), and a plate-like backing pad (9) connected to the eccentric element (17) in a manner freely rotatable about a second rotational axis (16). The first and second rotational axes (10, 16) extend essentially parallel to one another and are spaced apart from one another. In order to provide for a power tool (1) particularly quiet and low in vibrations, it is suggested that at least part of an external circumferential surface of the eccentric element (17) has an at least discrete rotational symmetry in respect to the first rotational axis (10); and the power tool (1) comprises at least one first bearing (30) provided between the rotationally symmetric part of the external circumferential surface of the eccentric element (17) and the static body (31) of the power tool (1) so that the eccentric element (17) is guided in respect to the body (31) in a manner rotatable about the first rotational axis (10).
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公开(公告)号：US20240025004A1
公开(公告)日：2024-01-25
申请号：US18041658
申请日：2021-08-05
申请人： Robert Bosch GmbH
CPC分类号： B24B23/028 , B23Q9/0007 , B24B27/08 , B25F5/021 , B24B47/12
摘要： A hand-held power tool, in particular an angle grinder, includes a tool housing that includes a handle casing for holding the power tool as well as a drive casing, in particular arranged on the handle casing, for accommodating a drive unit operable in particular by means of a rechargeable battery unit. The drive unit has an input shaft, which is in particular mounted to be rotatable about an input axis, and an output shaft, which is in particular mounted to be rotatable about an output axis.
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公开(公告)号：US11878391B2
公开(公告)日：2024-01-23
申请号：US17687010
申请日：2022-03-04
发明人： Scott S. McLain
CPC分类号： B24B47/12 , B24B23/028 , B24B23/03 , B24B23/04 , B24B41/042
摘要： An automatic adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. A counterbalance shaft assembly is rotatably disposed at least partially within the cavity. A shaft portion of the counterweight shaft assemblies aligned with the central axis. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the counterweight shaft with the mounting assembly. The stroke adjuster enables the mounting assembly to adjust its stroke upon rotation of counterweight shaft. The mounting assembly variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has a gear automatically adjusting the mounting assembly stroke.
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公开(公告)号：US11843340B2
公开(公告)日：2023-12-12
申请号：US17833411
申请日：2022-06-06
发明人： Hongwei Wang , Qian Xu , Weipeng Chen , Xiangqing Fu , Dongrong Qiu , Wencheng Li
CPC分类号： H02P29/40 , B24B23/028 , H02P29/50 , H02P6/14 , Y02P70/10
摘要： A power tool includes a brushless motor including several windings, a drive circuit for driving the brushless motor, a detection device for detecting the brushless motor so as to obtain a load parameter corresponding to a load of the brushless motor, and a controller for outputting a first control signal to reduce current of the brushless motor in a first slope when the load parameter exceeds a first preset range.
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