EP3157713A1 - Machine-outil à main équipée d'un moteur électrique à commutation électronique comme entrainement direct - Google Patents

Machine-outil à main équipée d'un moteur électrique à commutation électronique comme entrainement direct

Info

Publication number
EP3157713A1
EP3157713A1 EP15717458.2A EP15717458A EP3157713A1 EP 3157713 A1 EP3157713 A1 EP 3157713A1 EP 15717458 A EP15717458 A EP 15717458A EP 3157713 A1 EP3157713 A1 EP 3157713A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
electronically commutated
tool
commutated electric
hand tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP15717458.2A
Other languages
German (de)
English (en)
Inventor
Cornelius Boeck
Daniel BARTH
Florian Esenwein
Manfred Lutz
Joachim Schadow
Joerg Maute
Joern Stock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3157713A1 publication Critical patent/EP3157713A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools

Definitions

  • the invention relates to a hand tool with an electronically commutated electric motor as a direct drive.
  • hand tool machines in particular Winkelschrier with electronically commutated electric motor are known.
  • Such hand tool machines are available in various sizes and performance classes. The design is often difficult, especially because the geometric sizes of the components, as well as the masses to be incorporated lead to ergonomically unfavorable to handle hand tools.
  • a hand tool has an electronically commutated electric motor.
  • the electronically commutated electric motor is intended to drive a machining tool
  • the commutation takes place in electronically commutated electric motors with the help of electronics.
  • electronically commutated electric motors have a longer service life and a higher performance than motors whose Commutation with the help of carbon brushes happens.
  • the electronically commutated electric motor drives a machining tool of the
  • the electronically commutated electric motor is the machining tool of the
  • Power tool directly drives.
  • direct is meant in particular that the electronically commutated electric motor is connected to the machining tool without the interposition of a conventional transmission
  • Hand machine tool has a diameter d W erkzeu g.
  • a particularly ergonomic hand tool machine results when the electronically commutated electric motor has an outer diameter d Mo gate and a ratio of the outer diameter d Mo gate of electronically commutated
  • the electronically commutated electric motor has a rotational speed n, the ratio of the rotational speed n of the electronically commutated Elektromotorszum diameter d W erkzeu g of the machining tool preferably at most 28.5 rpm / mm.
  • the electronically commutated electric motor has a height h Mo tor, the height h Mo tor at existing
  • Sensor element including a dimension, which is predetermined by the sensor element defined. If the sensor element is not present, the height h Mo gate is limited only by the dimensions of the electric motor. wherein the ratio of the height h Mo gate of the electronically commutated
  • a ratio (W erkzeu d g - d tor Mo) / n lmm * min / 50, particularly lmm * min / 40, but preferably lmm * min / 22nd
  • the electronically commutated electric motor is an external rotor motor, high torques can be generated. If the hand tool has a power supply connection, advantageously high power classes are achieved.
  • the hand tool machine is designed as a battery-operated hand tool machine, a flexible handling of the hand tool machine is possible.
  • Figure 1 shows an embodiment of an inventive
  • Figure 2 shows a second embodiment of the invention
  • the hand tool 10 on which the invention is based is shown in FIG. 1 as an angle grinder.
  • Other hand tool machines are also possible according to the invention
  • a hand tool 10 of this type has an electric motor drive 12, a first housing part 14 and a second housing part 16.
  • the electric motor drive 12 is arranged in the first housing part 14. in the
  • the electric motor drive 12 is designed as electronically commutated electric motor 12, which drives a motor shaft 18.
  • the second housing part 16 is designed as a handle and extends in a direction away from the first housing part 14 direction. In another type, a handle may also connect to the second housing part 16.
  • Motor shaft 18 continues in a tool spindle 20, at the one
  • Machining tool 22 is fixed. But it is also conceivable that the
  • Motor shaft 18 is connected via a coupling with the tool spindle 20.
  • the machining tool 22 is commutated by the electronically
  • the machining tool 22 may be a grinding, cutting or polishing disc.
  • the processing tool 22 in the exemplary embodiment a diameter d W erkzeu g.
  • An electronics 24 for energizing the electronically commutated electric motor 12 is arranged in the second housing part 16. But it is also conceivable that the electronics 24 is arranged in the first housing part 14 or in a separate housing part.
  • the electronically commutated electric motor 12 has an outer diameter d Mo tor.
  • Hand machine tool 10 is achieved by adjusting the ratio of the outer diameter d of the electronically Mo tor kom mutant electric motor 12, but preferably to the diameter d W erkzeu g of the machining tool 22 at most 0.42, particularly 0.39 0.32. In the mentioned area is the
  • Hand tool optimally designed in terms of size, weight and center of gravity of the electronically commutated electric motor. For the operator, this means a high ergonomic point
  • the electric motor 12 to the diameter d W erkzeu g of the machining tool preferably at most 22 mm is 28.5 rpm /. At this value is the
  • Hand tool optimally designed with respect to the performance of the electronically commutated electric motor.
  • Electric motor 12 is defined by a height h Mo tor.
  • the height h is Mo tor including a dimension that is determined by the sensor element 50, defined in the presence of a sensor element 50th If the sensor element 50 is not present, the height h Mo tor is limited only by the dimension of the electric motor.
  • the ratio of the height h Mo tor of the electronically commutated electric motor 12 to the diameter d W erkzeu g of the machining tool 22 is at most 0.36, particularly at most 0.30, but is preferably at most 0.22.
  • the power tool is optimally designed in terms of size and weight. For the operator, this means a high level of user-friendliness from an ergonomic point of view.
  • a ratio (d Who kzeu g - dmotor) / n is ideally lmm * min / 50, particularly lmm * min / 40, but preferably lmm * min / 22nd
  • the electronically commutated electric motor 12 is an external rotor motor. In engines of this type is a stator that the
  • stator current-carrying windings are enclosed by a rotor.
  • the magnetic field is generated by permanent magnets, which are arranged in the rotor.
  • the rotor is fixed to the motor shaft 18 while the stator is mounted on a stator.
  • the electronically commutated electric motor 12 is designed as an internal rotor motor.
  • the stator which carries the current-carrying windings, on the motor housing 24.
  • the rotor which carries the permanent magnets is connected to the motor shaft 18.
  • Permanent magnets detected in the rotor via one or more sensors 50 and evaluated by the electronics 24 Based on the angular position of the rotor and the desired direction of rotation of the electronics 24, the respective windings are energized to produce the required torque. But it is also conceivable that the commutation is sensorless by the detection of a triggered in the windings of the stator counter voltage.
  • the electronically commutated electric motor 12 drives the tool spindle 20 directly, that is without the interposition of a conventional transmission.
  • the handheld power tool 10 is known as
  • the hand tool 10 is provided with a power cord 32.
  • the power cord 32 leads via a spout 34 in the interior of the power tool 10 to the electronics 24 and a 24 belonging to the electronics power supply.
  • a battery-powered hand tool 10 is formed.
  • the rechargeable battery 38 is connected to the second housing part 14 of the power tool 10.
  • a large part of a battery length 1 B is arranged outside of the second housing part 14.
  • a rechargeable battery 38 penetrating battery axis 40 of the rechargeable battery 38 is in this case at an angle, in particular at right angles to the main extension axis of the second housing part 14th
  • the rechargeable battery 38 consists in particular of lithium ion battery cells.
  • the rechargeable battery 38 in this case comprises one or more rows of battery cells, which in turn are connected in parallel and / or in series with each other.
  • Lithium ion batteries are characterized by a high energy density and thermal stability even at high loads, which means high performance. Another big advantage is the low self-discharge, which also means that the batteries are ready for use even with longer service lives.
  • the rechargeable battery 38 consists of lithium-air cells, lithium-sulfur cells, lithium polymer cells or the like. Furthermore, the rechargeable battery 38 may be realized in a different geometric embodiment than shown, such as a cylindrical embodiment, in particular at least partially received by the handle.
  • the rechargeable battery 38 may be configured as a replaceable rechargeable battery 38. But it is also conceivable that the rechargeable battery 38 is designed as an integrated unit.
  • the hand tool 10 is designed as an angle grinder.
  • Angle grinders are hand tool machines 10 for grinding and separating metals and similar materials. But it is also conceivable that the hand tool 10, for example, as a disc sander, a
  • Cup grinder, a polisher, a concrete grinder or a milling machine is formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Portable Power Tools In General (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne une machine-outil à main (10), en particulier une meuleuse d'angle, comprenant un entraînement électromoteur (12), équipé d'un moteur électrique (12) à commutation électronique qui est destiné à entraîner un outil de traitement (22), et un outil de traitement (22). Selon l'invention, le moteur électrique (12) à commutation électronique a un diamètre extérieur dMotor, le rapport du diamètre extérieur dMotor du moteur électrique (12) à commutation électronique au diamètre dWerkzeug de l'outil de traitement (22) étant de 0,42 maximum, en particulier de 0,39 maximum, mais de préférence de 0,32 maximum.
EP15717458.2A 2014-06-17 2015-04-14 Machine-outil à main équipée d'un moteur électrique à commutation électronique comme entrainement direct Pending EP3157713A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014211615.5A DE102014211615A1 (de) 2014-06-17 2014-06-17 Handwerkzeugmaschine mit elektronisch kommutiertem Elektromotor als Direktantrieb
PCT/EP2015/058014 WO2015192994A1 (fr) 2014-06-17 2015-04-14 Machine-outil à main équipée d'un moteur électrique à commutation électronique comme entrainement direct

Publications (1)

Publication Number Publication Date
EP3157713A1 true EP3157713A1 (fr) 2017-04-26

Family

ID=52991712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15717458.2A Pending EP3157713A1 (fr) 2014-06-17 2015-04-14 Machine-outil à main équipée d'un moteur électrique à commutation électronique comme entrainement direct

Country Status (6)

Country Link
US (1) US10189140B2 (fr)
EP (1) EP3157713A1 (fr)
JP (1) JP2017525581A (fr)
CN (1) CN106457551A (fr)
DE (1) DE102014211615A1 (fr)
WO (1) WO2015192994A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11837935B2 (en) 2021-02-02 2023-12-05 Black & Decker, Inc. Canned brushless motor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013215821A1 (de) * 2013-08-09 2015-02-12 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektromotorischen Antrieb als Direktantrieb
EP3299121B1 (fr) * 2016-09-27 2019-03-06 X'Pole Precision Tools Inc. Meuleuse électrique avec moteur à réluctance commutée
DE102017205313A1 (de) * 2017-03-29 2018-10-04 Robert Bosch Gmbh Elektronikmodul
CN107914198A (zh) * 2017-11-03 2018-04-17 长乐市龙曦机械加工厂 一种电机壳体生产用带吸屑的金属切割打磨设备
EP4250541A3 (fr) 2019-04-24 2024-04-10 Black & Decker Inc. Support de stator de moteur sans balai à rotor externe
JPWO2020250716A1 (fr) * 2019-06-14 2020-12-17
DE102019209851A1 (de) * 2019-07-04 2021-01-07 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektronisch kommutierten Motor
EP3967457B1 (fr) * 2020-09-10 2024-03-20 Guido Valentini Outil électrique à batterie guidé à la main

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US5642008A (en) * 1995-10-20 1997-06-24 Waxing Corporation Of America, Inc. Power tool motor assembly
US7318768B2 (en) 2004-04-13 2008-01-15 Black & Decker Inc. Low profile electric sander
GB2420090A (en) * 2004-11-12 2006-05-17 Leslie Stuart Jackson An electrically powered grinding tool
JP5253717B2 (ja) * 2006-04-27 2013-07-31 株式会社マキタ Ｄｃブラシレスモータ
EP2391480B2 (fr) * 2009-01-30 2018-08-15 Koki Holdings Kabushiki Kaisha Outil électrique
JP5435212B2 (ja) * 2009-05-21 2014-03-05 日立工機株式会社 ディスクグラインダ
US8628380B2 (en) * 2009-07-14 2014-01-14 Tai-Her Yang Direct motor-drive portable angle grinder
US8353278B2 (en) * 2009-07-22 2013-01-15 C.M.S.-North America, Inc. Rotary stone cutting tool
US8328599B2 (en) * 2009-10-05 2012-12-11 Tai-Her Yang Internal rotation type direct motor-drive portable angle grinder
JP2013119129A (ja) 2011-12-06 2013-06-17 Makita Corp 電動工具
JP5633940B2 (ja) 2012-03-15 2014-12-03 日立工機株式会社 携帯用電気切断機
DE102013215821A1 (de) * 2013-08-09 2015-02-12 Robert Bosch Gmbh Handwerkzeugmaschine mit einem elektromotorischen Antrieb als Direktantrieb
DE102013219450A1 (de) * 2013-09-26 2015-03-26 Robert Bosch Gmbh Batteriebetriebener Exzenterschleifer mit einem elektronisch kommutierten Elektromotor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11837935B2 (en) 2021-02-02 2023-12-05 Black & Decker, Inc. Canned brushless motor
US11855521B2 (en) 2021-02-02 2023-12-26 Black & Decker, Inc. Brushless DC motor for a body-grip power tool
US11870316B2 (en) 2021-02-02 2024-01-09 Black & Decker, Inc. Brushless motor including a nested bearing bridge
US11876424B2 (en) 2021-02-02 2024-01-16 Black & Decker Inc. Compact brushless motor including in-line terminals
US11955863B2 (en) 2021-02-02 2024-04-09 Black & Decker Inc. Circuit board assembly for compact brushless motor

Also Published As

Publication number Publication date
US10189140B2 (en) 2019-01-29
JP2017525581A (ja) 2017-09-07
WO2015192994A1 (fr) 2015-12-23
US20170113319A1 (en) 2017-04-27
DE102014211615A1 (de) 2015-12-17
CN106457551A (zh) 2017-02-22

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