EP2553794A2 - Outil électrique manuel - Google Patents

Outil électrique manuel

Info

Publication number
EP2553794A2
EP2553794A2 EP11712541A EP11712541A EP2553794A2 EP 2553794 A2 EP2553794 A2 EP 2553794A2 EP 11712541 A EP11712541 A EP 11712541A EP 11712541 A EP11712541 A EP 11712541A EP 2553794 A2 EP2553794 A2 EP 2553794A2
Authority
EP
European Patent Office
Prior art keywords
power tool
tool according
shielding ring
commutator
housing
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.)
Withdrawn
Application number
EP11712541A
Other languages
German (de)
English (en)
Inventor
Jens Blum
Heiko Roehm
Tobias Herr
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 EP2553794A2 publication Critical patent/EP2553794A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
    • H02K11/014—Shields associated with stationary parts, e.g. stator cores
    • H02K11/0141—Shields associated with casings, enclosures or brackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H02K7/145—Hand-held machine tool

Definitions

  • the present invention relates to a hand-held power tool with a tool housing, in which a drive motor is arranged with an associated commutator.
  • Such hand-held power tools are known from the prior art, in which an associated with a tool housing a commutator drive motor is arranged, wherein the commutator has a collector which is on a collector tread in sliding contact with associated brushes, via which the drive motor a required Motor current can be fed.
  • the collector attached to a rotor driven by the drive motor usually rotates relative to the brushes stationarily mounted in the tool housing for commutating the motor.
  • a disadvantage of the prior art is that the commutator generates commutation changes in the operation of the power tool electromagnetic interference radiation emitted by it.
  • An object of the invention is therefore to provide a new hand-held power tool, in which at least a reduction of the radiated during operation of the power tool of this electromagnetic interference is possible.
  • This problem is solved by a hand-held power tool with a tool housing, in which a drive motor is arranged with an associated commutator.
  • a shielding ring provided with metal is provided in the area of the commutator for shielding electromagnetic interference radiation.
  • the invention thus makes it possible to use a simple and inexpensive shielding ring for reducing the radiated electromagnetic radiation emitted by the power tool, which are generated by the commutator during commutation.
  • the drive motor is arranged in an associated motor housing, which is fastened in the tool housing.
  • the invention thus enables a safe and reliable reduction of the radiated electromagnetic radiation emitted by the power tool both in power tools with a so-called "open-frame” design, as well as power tools with a so-called “can” design.
  • no electrically conductive connection is formed between the shielding ring and metallic components of the drive motor.
  • the shielding ring is preferably arranged sleeve-shaped on the tool housing.
  • the commutator has a collector which is in sliding contact with associated brushes on a collector tread.
  • the collector tread is at least partially enveloped by the shield.
  • At least the brushes are enveloped by the shielding ring.
  • the tool housing is made of plastic.
  • the invention thus makes it possible to provide a cost-effective tool housing with comparatively low weight.
  • the shielding ring comprises steel, copper, aluminum, iron, zinc and / or magnesium.
  • a compact shielding ring can be provided, with which an efficient reduction of the radiated electromagnetic interference radiation can be achieved.
  • the shielding ring preferably has a quadrangular or a circular cross section.
  • the shielding ring is formed spiral spring or lattice-shaped.
  • the shielding ring is designed to enable at least a reduction of electromagnetic interference radiated during operation of the power tool, which occurs during commutation changes of the commutator.
  • FIG. 1 is a schematic view of a hand-held power tool according to a first embodiment
  • FIG. 2 is a schematic view of the power tool of FIG. 1 according to a second embodiment.
  • FIG. 1 shows a hand-held power tool 100 according to a first embodiment.
  • This example has a tool housing 105 with a handle 1 15 and is mechanically and electrically connected to the mains independent power supply with a battery pack 190.
  • the power tool 100 is exemplified as a cordless drill. It is pointed out, however, that the present invention is not limited to cordless drill drivers, but rather can be used with different, in particular cordless, powered tools, in which a tool is set in rotation, for example by means of tools.
  • the present invention can also be found in network-dependent operable power tools application.
  • At least partially made of plastic for.
  • PC, PA, ABS and / or PA ABS trained tool housing 105 are powered by the battery pack 190 with power, electric drive motor 180 and a transmission 170 is disposed.
  • the drive motor 180 is above the transmission
  • the drive shaft 120 is rotatably supported by a bearing assembly 130 in the tool housing 105 and provided with a tool holder 140, which is arranged in the region of an end face 1 12 of the tool housing 105 and by way of example a drill chuck 145 up.
  • the bearing assembly 130 is in this case z. B. attached to the tool housing 105.
  • the tool holder 140 serves to receive a tool 150 and can be integrally formed with the drive shaft 120 or be connected to it in a tower-shaped manner. In Fig. 1, the tool holder 140 is exemplified aufsatzartig trained and attached via a provided on the drive shaft 120 fastening device 122 thereto.
  • the bearing assembly 130 illustratively includes a first bearing 134 and a second bearing 132 spaced therefrom, which are exemplified as ball bearings. It should be understood, however, that other types of bearings may be used within the scope of the present invention.
  • the bearings 132, 134 may alternatively be realized as slide bearings, needle sheath, roller bearings or other types of rolling bearing.
  • the drive motor 180 is designed in the so-called "o-pen-frame" construction, in which case the tool housing 105 of the power tool 100 serves directly as a motor housing, ie corresponding stator and rotor components 181 or 182 of the motor 180 can be located directly on the tool housing 105 supported or attached.
  • the transmission 170 is z. As a trained with various gear or planetary planetary gear, which is associated with an optional torque clutch 175. During operation of the power tool 100, the planetary gear 170 is rotationally driven by the drive motor 180. It should be noted, however, that the use of a planetary gear is merely exemplary
  • actuatable drive motor 180 is z.
  • a DC motor which has a commutator 185 for commutation and is at least partially formed with metallic components 186, which are not shown for the sake of clarity and clarity of the drawings in Fig. 1.
  • the commutator 185 has a collector 183 which is connected to an associated collector tread 189 with two or more brushes 187, z. B. carbon brushes, makes a sliding contact, so that the motor 180 during operation of the power tool 100 via the brush 187 and the collector 185, a suitable Mo- torstrom is supplied.
  • the drive motor 180 can be controlled or regulated such that both a reversing operation as well as specifications with respect to a desired rotational speed can be realized.
  • the operation and the construction of a suitable drive motor with associated commutator are well known from the prior art, so here for the purpose
  • a metal-provided shielding ring 110 which is fastened to the tool housing 105 and is shown in an illustrative section in FIG.
  • the shielding ring 1 10 is preferably formed sleeve-shaped and illustratively arranged in a formed on the tool housing 105 circumferential groove 107 or fixed therein, for. B. injected.
  • the shielding ring 110 is designed to shield electromagnetic interference radiation which occurs during commutation changes at the commutator 185 during operation of the power tool 100 and is emitted by the power tool 100.
  • the shielding ring 1 10 encloses the collector running surface 189 of the commutator 185 at least in sections and preferably covers at least the brushes 187. Between the shield ring 1 10 and the metallic components 186 of the drive motor 180 is preferably no electrically conductive connection to the shielding effect of the shield 1 10th not to interfere.
  • the shielding ring 10 has a quadrangular or circular cross section and comprises steel, copper, aluminum, iron, zinc and / or magnesium.
  • the shield ring 1 10 z. B. sheet-like and / or wire-shaped.
  • the shielding ring 10 can be embodied sleeve-shaped and / or at least in sections in a spiral spring and / or lattice-shaped manner.
  • FIG. 2 shows the hand-held power tool 100 of FIG. 1 according to a second embodiment, in which the drive motor 180 is designed according to the so-called "can" design, in contrast to FIG at- orderly.
  • the motor housing 280 is arranged or fastened in the tool housing 105 of the electric tool 100.
  • the transmission 170 also has an associated transmission housing 270. Furthermore, the commutator 185 is also at least partially in the
  • Motor housing 280 arranged.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne un outil électrique manuel (100) comprenant un boîtier d'outil (105) dans lequel est logé un moteur d'entraînement (180) auquel est associé un commutateur (185). Selon l'invention, une bague de protection (110) pourvue de métal est présente sur le boîtier d'outil (105) dans la zone du commutateur (185) et sert de protection contre les rayonnements électromagnétiques parasites.
EP11712541A 2010-04-01 2011-03-31 Outil électrique manuel Withdrawn EP2553794A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010003583A DE102010003583A1 (de) 2010-04-01 2010-04-01 Handgeführtes Elektrowerkzeug
PCT/EP2011/055007 WO2011121072A2 (fr) 2010-04-01 2011-03-31 Outil électrique manuel

Publications (1)

Publication Number Publication Date
EP2553794A2 true EP2553794A2 (fr) 2013-02-06

Family

ID=44625701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11712541A Withdrawn EP2553794A2 (fr) 2010-04-01 2011-03-31 Outil électrique manuel

Country Status (5)

Country Link
US (1) US20130106209A1 (fr)
EP (1) EP2553794A2 (fr)
CN (1) CN102812625A (fr)
DE (1) DE102010003583A1 (fr)
WO (1) WO2011121072A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010028299A1 (de) * 2010-04-28 2011-11-03 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug
GB2586016A (en) 2019-07-26 2021-02-03 Black & Decker Inc Electromagnetic Interference suppression

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3318362A1 (de) * 1983-05-20 1984-11-22 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektromotor, insbesondere scheibenwischermotor
US5458159A (en) * 1993-12-17 1995-10-17 Cooper Industries, Inc. Shielded electrically powered wire wrap tool
DE4439799C1 (de) * 1994-11-08 1996-05-02 Wolf Gmbh Richard Elektromotorische Antriebseinheit für chirurgische Werkzeuge
US5845718A (en) * 1997-05-29 1998-12-08 Ingersoll-Rand Company Resonant oscillating mass-based torquing tool
DE19804369C2 (de) * 1998-02-04 2000-02-17 Bosch Gmbh Robert Kollektormotor
US7268461B2 (en) * 2001-02-15 2007-09-11 Integral Technologies, Inc. Low cost electrical motor components manufactured from conductive loaded resin-based materials
DE10248921A1 (de) * 2002-10-17 2004-05-13 C. & E. Fein Gmbh & Co Kg Elektrowerkzeug
DE102004020177B4 (de) * 2004-04-24 2024-07-18 Robert Bosch Gmbh Handwerkzeugmaschine mit einem drehenden und/oder schlagenden Antrieb
JP2008221349A (ja) * 2007-03-08 2008-09-25 Matsushita Electric Works Ltd 電動工具
CN101656454A (zh) * 2008-06-26 2010-02-24 创科电动工具科技有限公司 包括混合型电动机设计的电动工具
US8508084B2 (en) * 2008-06-26 2013-08-13 Techtronic Power Tools Technology Limited Power tool including hybrid electric motor design
DE102010028299A1 (de) * 2010-04-28 2011-11-03 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011121072A2 *

Also Published As

Publication number Publication date
DE102010003583A1 (de) 2011-10-06
WO2011121072A2 (fr) 2011-10-06
WO2011121072A3 (fr) 2012-08-16
US20130106209A1 (en) 2013-05-02
CN102812625A (zh) 2012-12-05

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