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公开(公告)号：US11374473B2
公开(公告)日：2022-06-28
申请号：US16674802
申请日：2019-11-05
申请人： C. & E. Fein GmbH
摘要： An EC motor for an electric hand tool having a stator in which a rotor is rotatably mounted, which comprises a rotor lamination stack, which has a passage opening and is formed of individual laminations, and a rotor shaft which is cast in the passage opening of the rotor lamination stack by means of a casting compound, and having a plurality of permanent magnets, which are received in the pockets formed in the rotor lamination stack. An annular channel, which is connected to the pockets in a fluid-conducting manner via radial channels, each of which is formed of a plurality of channel sections formed in adjacent laminations of the rotor lamination stack, is formed between the rotor shaft and the wall of the passage opening for supplying the casting compound from the annular channel to the pockets. A method is also provided for producing a rotor for an EC motor.
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公开(公告)号：US11224923B2
公开(公告)日：2022-01-18
申请号：US16259274
申请日：2019-01-28
申请人： C. & E. Fein GmbH
发明人： Kristopher Stoker
IPC分类号： B23B31/107 , B23B27/00 , B23B31/06 , B23Q3/12
摘要： A tool holder for a machine tool, in particular for a core drilling machine, having a hollow shaft which has, at one end for coupling to the drive of the machine tool, a connector and, at the other end, a receiving opening with a plurality of openings in which locking elements are accommodated which are radially adjustable between a clamping position and an release position for securing a tool accommodated in the receiving opening. A switching sleeve is provided, which is adjustably mounted on the hollow shaft between a first switching position and a second switching position, a first subset of the locking elements being provided in the first switching position for locking the tool in the receiving opening, and a second subset of the locking elements being provided in the second switching position for locking the tool in the receiving opening, while the adjustment of the respective remaining locking elements is deactivated.
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公开(公告)号：US11203074B2
公开(公告)日：2021-12-21
申请号：US16563191
申请日：2019-09-06
申请人： C. & E. Fein GmbH
发明人： Fabian Bek , Rainer Mann , Tobias Meissner , Luisa Riem
摘要： A tool attachment, in particular hole saw, for a power tool having a driving axle that is drivable in oscillation. The tool attachment including a connecting device with which the tool attachment is attachable to the power tool such that the driving axle thereof and a tool axis essentially coincide. A work area has teeth, with the work area being at least partially circular in design and adjoining a hollow, cylindrical base. Openings are formed in the base, the openings constituting at least 60%, at least 80%, or at least 90% of the area of the base.
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公开(公告)号：US20210114197A1
公开(公告)日：2021-04-22
申请号：US17076646
申请日：2020-10-21
申请人： C. & E. Fein GmbH
发明人： Rainer MANN
摘要： A handheld electric power tool that is adapted to be driven in oscillation, the handheld electric power tool having a housing and a drive arranged in the housing for driving a toolholder, which is arranged on a tool shaft coupled to the drive and on which a tool is detachably installed. The tool shaft is accommodated in an output unit, which includes a gearhead accommodated in a gearhead housing, and a collar, which is designed so as to make possible a tool-free seating of an attachment in an installation direction oriented parallel to a longitudinal axis of the gearhead, is formed on the output unit.
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公开(公告)号：US10967435B2
公开(公告)日：2021-04-06
申请号：US16028860
申请日：2018-07-06
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 machine tool, in particular a hand held machine tool, which has a tool receiving device that is movable, in particular in an oscillating manner, around an output shaft. The tool receiving device is designed to hold a tool device on the machine tool in such a manner that the output shaft and a tool rotation axis substantially coincide. The tool receiving device has at least one torque transmission region and a holding device. In order to transmit a driving force to the tool device, the torque transmission region has at least two output area regions that are arranged at a distance from said output shaft and each have a multiplicity of surface points. Here, the tangent planes to said surface points are inclined in regard to an axial plane which includes said output shaft. Furthermore, the tangent planes are inclined in regard to a radial plane which extends perpendicularly to the output shaft. In this way, the output torque is transmitted reliably to the tool device by the machine tool via the tool receiving device.
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公开(公告)号：US10828743B2
公开(公告)日：2020-11-10
申请号：US15848069
申请日：2017-12-20
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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公开(公告)号：US20200282474A1
公开(公告)日：2020-09-10
申请号：US16563191
申请日：2019-09-06
申请人： C. & E. Fein GmbH
发明人： Fabian BEK , Rainer MANN , Tobias MEISSNER , Luisa RIEM
摘要： A tool attachment, in particular hole saw, for a power tool having a driving axle that is drivable in oscillation. The tool attachment including a connecting device with which the tool attachment is attachable to a power tool such that the driving axle thereof and a tool axis essentially coincide. A work area has teeth that are at least partially circular in design and adjoin a hollow, cylindrical base. At least two openings formed in the base, the at least two openings constitute at least 60%, at least 80%, or at least 90% of the area of the base.
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公开(公告)号：US10667441B2
公开(公告)日：2020-05-26
申请号：US16404194
申请日：2019-05-06
申请人： C. & E. Fein GmbH
摘要： An electronic unit for a hand-held power tool, having a mounting frame having an accommodation space into which a circuit board carrying a plurality of electronic components is inserted and at least one heat sink for the heat dissipation of waste heat arising at the electronic components. A slot section with at least one insertion slot, oriented perpendicular to the printed circuit board, for mounting an electronic component along a direction of insertion is formed on the mounting frame. The at least one heat sink is associated with the slot section.
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公开(公告)号：US20190389020A1
公开(公告)日：2019-12-26
申请号：US16453450
申请日：2019-06-26
申请人： C. & E. Fein GmbH
发明人： Wolfgang DUERNEGGER
摘要： A gearhead for a handheld power tool for machining workpieces, having a housing in which an output that can be connected to a drive of a handheld power tool is accommodated, and also having a tool shaft to which a tool can be coupled, wherein a braking device that can be moved between a braking position and a release position and that acts upon the tool shaft is provided for braking of the tool shaft. A switching device is provided that can be moved between a first switching position, in which the tool shaft is connected to the output in a power transmitting manner and in which the braking device is transferred into the release position, and a second switching position, in which the tool shaft is decoupled from the output and in which the braking device is transferred into the braking position.
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公开(公告)号：US20190343016A1
公开(公告)日：2019-11-07
申请号：US16404194
申请日：2019-05-06
申请人： C. & E. Fein GmbH
摘要： An electronic unit for a hand-held power tool, having a mounting frame having an accommodation space into which a circuit board carrying a plurality of electronic components is inserted and at least one heat sink for the heat dissipation of waste heat arising at the electronic components. A slot section with at least one insertion slot, oriented perpendicular to the printed circuit board, for mounting an electronic component along a direction of insertion is formed on the mounting frame. The at least one heat sink is associated with the slot section.
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