EP2130288A1 - Porte-aimants pour moteur électrique - Google Patents

Porte-aimants pour moteur électrique

Info

Publication number
EP2130288A1
EP2130288A1 EP08701676A EP08701676A EP2130288A1 EP 2130288 A1 EP2130288 A1 EP 2130288A1 EP 08701676 A EP08701676 A EP 08701676A EP 08701676 A EP08701676 A EP 08701676A EP 2130288 A1 EP2130288 A1 EP 2130288A1
Authority
EP
European Patent Office
Prior art keywords
circumference
magnets
electric motor
magnet holder
holder
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Withdrawn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
EP08701676A
Other languages
German (de)
English (en)
Inventor
Ulrich Luedtke
Ralf Kunz
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 EP2130288A1 publication Critical patent/EP2130288A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets

Definitions

  • the present invention relates to a magnet holder for an electric motor according to the preamble of patent claim 1, a corresponding electric motor according to the preamble of patent claim 6 and a method for assembling the electric motor according to claim 7.
  • a known from the prior art magnetic holder forms a ring having a circumference.
  • the magnet holder comprises a plurality of spring elements which are arranged along the circumference and press the magnets against a housing of the electric motor.
  • the disadvantage is that the assembly of the electric motor is cumbersome because the spring elements, in particular during assembly, push the magnets outward from the magnet holder.
  • the present invention has for its object to provide a magnet holder, an electric motor with the magnet holder and a method for assembling the electric motor, wherein the motor can be easily assembled.
  • the object underlying the invention is achieved by a magnetic holder with the features of the characterizing part of patent claim 1, an electric motor with the Merk- paint the characterizing part of claim 6 and a method according to claim 7 solved.
  • the present invention relates to a magnetic holder, wherein along the circumference a plurality of recesses are provided, in which magnets are accommodated, and wherein a cover member is provided around the circumference.
  • the cover protects a coating of the magnets during assembly when inserted into a housing and during operation against micro-movements.
  • the recesses allow accurate positioning of the magnets and thus low tolerances.
  • the magnet holder can be transported together with the magnets during production.
  • the cover element also dampens vibrations.
  • a thin cover member also leads to a low magnetic resistance to the magnetizable housing and thus to high performance of the electric motor.
  • the cover member is an adhesive tape.
  • an adhesive tape can be processed particularly easily.
  • the cover is a shrink tube.
  • a shrink tube allows a particularly permanent attachment of the magnets.
  • the cover member is an elastic band.
  • a cover can be processed very easily.
  • the magnets are cuboid.
  • the present invention relates to an electric motor with a magnetic holder, wherein a plurality of recesses are provided along the circumference, are accommodated in which magnets, and wherein a cover member is provided around the circumference.
  • the present invention relates to a method of assembling an electric motor with a magnet holder, the magnet holder forming a ring having a circumference along which a plurality of recesses are provided, in which magnets are accommodated, comprising the steps of: inserting magnets in the recesses;
  • FIG. Fig. 1 is a side view of a magnet holder prior to insertion of magnets
  • FIG. FIG. 2 is a side view of the magnet holder after insertion of magnets;
  • FIG. FIG. 3 shows a side view of the magnet holder after attaching a cover element;
  • FIG. 4 shows a view of a housing with the magnet holder after attachment of a cover element from above; and FIG. 5 is a sectional view of an electric motor with the magnet holder.
  • FIG. 1 to 5 show a magnetic mount 11 (FIGS. 1 to 4) and an electric motor (FIG. 5) after successive steps 1 to 6, respectively.
  • FIG. Figure 1 shows a side view of a magnet holder 11 before insertion of magnets.
  • the magnet holder 11 is preferably made of plastic, which is easy to work, because of its low hardness, the magnets are not damaged and has a low weight, and forms a one-piece dodecagonal ring of six first and second sections 1 and 3, which at an angle of 30 ° are inclined to each other.
  • the first section 1 has a large recess 2 which is open at the bottom.
  • the second section 3 has an upper recess 4, which is open at the top, a lower receiving recesses 5, which is open at the bottom, and on two opposite sides in each case a step 6 and a lower support projection 7.
  • FIG. 2 shows a side view of the magnet holder 11 after the insertion of magnets 8 (step 1), which are cuboid-shaped.
  • magnets 8 are each received in one of the receiving recesses 5 so that they rest on the bottom of the support projections 7 and rest against the steps 6.
  • FIG. FIG. 3 shows a side view of the magnet holder 11 after attaching an adhesive tape 9 (step 2).
  • the adhesive tape 9 has been glued around the circumference of the magnet holder 11 and covers the magnets 8, so that they are protected.
  • the adhesive tape 9 prevents the magnets 8 from falling outward and presses them against the opposing steps 6.
  • a shrink tube or elastic band can be used or several adhesive tapes can be used, which are adjacent to each other around the circumference or glued one behind the other along the circumference.
  • the cover must therefore not completely surround the circumference. Characteristic of these cover is that they are flat, film-like and bendable and have a small thickness of preferably less than one millimeter.
  • FIG. 4 shows a view of a housing 10 with the magnet holder 11 after insertion of the magnet holder 11 into the housing 10 from above (step 3).
  • the housing 10 is twelve-cornered and is typically made of steel. Between the magnet holder 11 and the housing 10, the tape 9 is provided.
  • the housing 10 is closed at the bottom by the housing bottom 12, in the middle of which a lower shaft bearing 14 is formed.
  • FIG. 5 shows a sectional view of an electric motor with the magnet holder 11.
  • the magnets 9 form the stator of the electric motor.
  • the rotor 17 and the commutator 18 step 4
  • the sliding contact holder 19 step 5
  • the housing 10 was closed by the housing cover 13 (step 6).
  • In the center of the housing cover 13 is an upper shaft bearing 15.
  • the rotor shaft 16 is rotatably mounted in the upper and lower shaft bearings 14, 15 and extends through a central axis of the rotor 17 and a central axis of the commutator 18.
  • At the sliding contact holder 19 are two Sliding contacts 20 attached.
  • the sliding contact holder is received in a fixing ring 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La présente invention concerne un porte-aimants (11) pour moteur électrique, ledit porte-aimants (11) formant une bague pourvue d'un pourtour. L'objectif de l'invention est de simplifier l'assemblage du moteur. A cet effet, plusieurs évidements, dans lesquels des aimants (8) sont reçus, sont ménagés le long du pourtour de la bague et un élément de recouvrement est placé sur ce pourtour.
EP08701676A 2007-03-26 2008-01-28 Porte-aimants pour moteur électrique Withdrawn EP2130288A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710014348 DE102007014348A1 (de) 2007-03-26 2007-03-26 Magnethalterung für einen elektrischen Motor
PCT/EP2008/050951 WO2008116678A1 (fr) 2007-03-26 2008-01-28 Porte-aimants pour moteur électrique

Publications (1)

Publication Number Publication Date
EP2130288A1 true EP2130288A1 (fr) 2009-12-09

Family

ID=39420303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08701676A Withdrawn EP2130288A1 (fr) 2007-03-26 2008-01-28 Porte-aimants pour moteur électrique

Country Status (3)

Country Link
EP (1) EP2130288A1 (fr)
DE (1) DE102007014348A1 (fr)
WO (1) WO2008116678A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010001500A1 (de) 2010-02-02 2011-08-04 Robert Bosch GmbH, 70469 Außenkörper eines elektromechanischen Energiewandlers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1924473A1 (de) * 1969-05-13 1970-11-19 Deutsche Edelstahlwerke Ag Dauermagnetsystem als Stator fuer elektrische Kleinmotoren
NL179172C (nl) * 1976-06-21 1986-07-16 Shokichi Kumakura Ringvormige magneeteenheid.
DE3135217A1 (de) * 1981-09-05 1983-04-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart Gleichstromkleinmotor
JPS61196747A (ja) * 1985-02-21 1986-08-30 Nippon Denso Co Ltd 磁石式回転電機
FR2617343B1 (fr) * 1987-06-23 1993-05-21 Valeo Pole inducteur a aimant permanent, et stator de machine tournante electrique pourvu de tels poles
US5105114A (en) * 1991-05-20 1992-04-14 General Motors Corporation Frame and magnet assembly for a dynamoelectric machine
FR2730874B1 (fr) * 1995-02-16 1997-03-21 Ugimag Sa Inducteur composite pour machines tournantes electriques comportant des aimants permanents frittes enrobes dans un liant ferromagnetique
US5831364A (en) * 1997-01-22 1998-11-03 Ingersoll-Dresser Pump Company Encapsulated magnet carrier
EP1249063A2 (fr) * 2000-01-12 2002-10-16 Mol Belting Company Moteur electrique a rotor externe
JP4163953B2 (ja) * 2000-12-22 2008-10-08 株式会社ミツバ 回転子のマグネット保持構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008116678A1 *

Also Published As

Publication number Publication date
DE102007014348A1 (de) 2008-10-02
WO2008116678A1 (fr) 2008-10-02

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