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公开(公告)号：US20240313691A1
公开(公告)日：2024-09-19
申请号：US18607465
申请日：2024-03-16
申请人： C. & E. Fein GmbH
发明人： Bernd MAYER , Bernd MAYER , Eberhard SCHUMACHER
摘要： A motor control unit for a brushless electric motor of a power tool, in particular a hand-held power tool, having an electronic control device having a power limiting device designed to limit the power absorption of the electric motor in order to restrict the power absorption of the electric motor to a maximum permissible maximum power value and to adjust this maximum power value during the operation of the electric motor as a function of the at least one temperature value. A corresponding power tool and a method are also provided.
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公开(公告)号：US12076846B2
公开(公告)日：2024-09-03
申请号：US17837696
申请日：2022-06-10
申请人： C. & E. Fein GmbH
发明人： Horst Fahrner , Juergen Blickle
CPC分类号： B25F5/006 , B24B23/028
摘要： A handheld electric power tool, in particular an angle grinder, having a housing in which an electric motor is accommodated that drives a rotor shaft that is connected in a force-transmitting manner to an output unit accommodated in a gear head. A housing ring is provided that makes available at least one guide section for the gear head and a guide for the electric motor. An air guide section, in which a fan is accommodated that is attached to the rotor shaft, is formed on the side of the housing ring facing away from the housing.
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公开(公告)号：US11980949B2
公开(公告)日：2024-05-14
申请号：US17380539
申请日：2021-07-20
申请人： C.&E. Fein GmbH
发明人： Ralf Seebauer
CPC分类号： B23B45/008 , B25H1/0071 , B23B2260/062 , B23B2260/10 , Y10T408/554
摘要： A drilling machine, in particular a magnetic core drilling machine. The drilling machine having a magnetic base to detachably secure the drilling machine to a surface. A drive motor is arranged in a housing and has a rotor shaft with a rotor shaft longitudinal axis that is connected in a power-transmitting manner via a gear mechanism to a tool spindle with a spindle longitudinal axis. A tool holder is connected to the tool spindle to receive a drilling tool. The spindle longitudinal axis is aligned substantially parallel to the longitudinal axis of the rotor shaft, and the tool spindle is axially adjusted along the longitudinal axis of the spindle relative to the drive motor and the magnetic base.
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公开(公告)号：US11865692B2
公开(公告)日：2024-01-09
申请号：US17220583
申请日：2021-04-01
申请人： C. & E. Fein GmbH
CPC分类号： B25H1/0071 , B28D1/146 , B23B2260/10 , B23Q3/15
摘要： A magnetic base for an electric machine tool, in particular for a magnetic core drilling machine. A body that is accommodated in a receiving space. At least one first magnet coil constituting an electromagnet, a coil winding of the at least one first magnet coil being wound on a bobbin and a magnetic force of which is switchable between a maximum resultant holding force and a minimum resultant holding force. The coil winding of the magnet coil has two end sections that are each connected to a connecting cable that serves to make electrical contact between the magnetic coil and the electric machine tool. The body has a first side adapted to be coupled to the electric machine tool and has an opposite second side adapted to be placed on a workpiece that is to be processed. End sections of the coil winding are connected to the connecting cables.
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公开(公告)号：US20210394329A1
公开(公告)日：2021-12-23
申请号：US17351942
申请日：2021-06-18
申请人： C. & E. FEIN GMBH
IPC分类号： B24B23/02
摘要： A power tool, in particular an angle grinder, having a drive motor accommodated in a housing which drives a rotor shaft, a tool spindle comprising a tool holder which is preferentially connected to the rotor shaft in a power-transmitting manner by a gearing, as well as a control switch for activating the drive motor, wherein the control switch comprises a first switching element which is pivotably mounted on the housing about a pivot axis between a first switch position for switching on the drive motor and a second switch position for switching off the drive motor, and a second switching element which is rotatable about a rotational axis between a locked position which blocks the first switching element from moving into the first switch position and a release position which enables the first switching element to move into the first switch position.
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公开(公告)号：US20210328469A1
公开(公告)日：2021-10-21
申请号：US17308130
申请日：2021-05-05
申请人： C. & E. Fein GmbH
发明人： Christoph MAIER , Fabian GRASS , Thomas BURKHARDT
摘要： An EC motor is provided having a stator, in which an armature is rotatably supported, the armature including an armature shaft, on which an armature core having a plurality of permanent magnets is held, the armature core being electrically insulated against the armature shaft with the aid of a casting compound, and a balance ring being provided on at least one axial end of the armature core, which is accommodated on the armature shaft by a central recess, a gap between the armature shaft and the central recess of the balance ring being filled with casting compound, and the permanent magnets being held in pockets of the armature core by casting compound.
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公开(公告)号：US11114910B2
公开(公告)日：2021-09-07
申请号：US16184505
申请日：2018-11-08
申请人： C.&E. Fein GmbH
发明人： Christoph Maier , Fabian Grass , Thomas Burkhardt
IPC分类号： H02K15/02 , H02K1/28 , H02K1/30 , H02K1/27 , H02K7/04 , H02K15/03 , H02K15/12 , H02K15/16 , H02K21/14
摘要： An EC motor is provided having a stator, in which an armature is rotatably supported, the armature including an armature shaft, on which an armature core having a plurality of permanent magnets is held, the armature core being electrically insulated against the armature shaft with the aid of a casting compound, and a balance ring being provided on at least one axial end of the armature core, which is accommodated on the armature shaft by a central recess, a gap between the armature shaft and the central recess of the balance ring being filled with casting compound, and the permanent magnets being held in pockets of the armature core by casting compound.
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公开(公告)号：US20210031327A1
公开(公告)日：2021-02-04
申请号：US16942435
申请日：2020-07-29
申请人： C. & E. Fein GmbH
IPC分类号： B24B23/02 , F16H57/031
摘要： A gear head for a hand-held power tool for machining workpieces, in particular for an angle grinder. The gear head including a gear plate, a housing closable by the gear plate, in which a power take-off is accommodated, which is connectable to a drive of the hand-held power tool, the power take-off including a tool shaft protruding from the gear plate, which is at least partially surrounded by a safety guard fastenable to a gear flange of the housing. A securing lever locks the safety guard on the gear flange, the securing lever being adjustable around a pivot axis between a first position, in which the safety guard is rotatably fixedly connected to the gear flange and a second position, in which the safety guard is rotatable with respect to the gear flange against a force of a restoring element acting in a direction of the first position.
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公开(公告)号：US20210031273A1
公开(公告)日：2021-02-04
申请号：US17073843
申请日：2020-10-19
发明人： Olaf KLABUNDE , Juergen BLICKLE , Walter THOMASCHEWSKI , Fabian BEK , Stefano DELFINI , Willi FELLMANN , Bruno LUESCHER , Milan BOZIC , Thomas MATHYS , Daniel GROLIMUND
摘要： The invention relates to a tool device which is suitable for use with a machine tool, in particular a hand guided machine tool, having a driving device moving, in particular in an oscillating manner, around a driving axis. The tool device has an attachment device which allows it to be fastened on a machine tool such that its driving axis and an axis of rotation of the tool substantially coincide. The attachment device, for absorbing the driving force, has at least two driving area regions, which are spaced apart from said tool axis of rotation and each has a plurality of surface points. The tangent planes to said surface-area points are inclined in regard to an axial plane, which encloses the tool axis of rotation. Furthermore, said tangent planes are inclined regard to a radial plane which extends perpendicularly to the tool axis of rotation. This means that the torque introduced into the tool device by the machine tool, via the driving device, is reliably absorbed.
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公开(公告)号：US20210008683A1
公开(公告)日：2021-01-14
申请号：US17039104
申请日：2020-09-30
申请人： C. & E. Fein GmbH
发明人： Juergen BLICKLE , Achim HESS , Olaf KLABUNDE
摘要： An oscillating power tool with an electric motor is provided, including an armature shaft with an armature and a fan wheel, including an eccentric arranged on the armature shaft at one end thereof, a first balancing mass for balancing an unbalance of the eccentric and possibly an eccentric bearing, being arranged in the proximity of the eccentric or the eccentric bearing, respectively, however, at an axial distance, further including a second balancing mass for balancing a couple unbalance caused by the axial distance between the eccentric and the eccentric bearing, respectively, and the first balancing weight, wherein the second balancing mass is arranged on the armature shaft at the side facing away from the eccentric or the eccentric bearing. Also a method for balancing such an electric motor is provided.
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