EP2195891A1 - Balai pour une machine electrique et machine electrique - Google Patents

Balai pour une machine electrique et machine electrique

Info

Publication number
EP2195891A1
EP2195891A1 EP08786432A EP08786432A EP2195891A1 EP 2195891 A1 EP2195891 A1 EP 2195891A1 EP 08786432 A EP08786432 A EP 08786432A EP 08786432 A EP08786432 A EP 08786432A EP 2195891 A1 EP2195891 A1 EP 2195891A1
Authority
EP
European Patent Office
Prior art keywords
brush
spring
straight
stiffener
brush spring
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Withdrawn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
EP08786432A
Other languages
German (de)
English (en)
Inventor
Achim Hawighorst
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 EP2195891A1 publication Critical patent/EP2195891A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder

Definitions

  • the invention relates to a brush for an electric machine, comprising a brush spring and at least one brush body disposed thereon, wherein the brush spring is substantially C-shaped and has two legs extending away from the brush body on both sides, with which the brush spring in a brush holder of an electric motor can be arranged, wherein the brush spring has straight and curved portions.
  • Brushes of the type mentioned are known from the prior art. Such brushes are arranged pressed in an electrical machine with the brush body against a commutator of an electric motor. The extending away from the brush body legs of the brush spring can be arranged or fastened, for example by means of insertion on a brush holder of the electric motor. Such a brush is proposed for example in DE 102 23 630 A1.
  • the brush spring has straight and curved areas, curved areas being understood to mean strongly curved areas that are essentially curved, and straight areas, areas that are really straight or only slightly curved are. Due to the straight and curved areas, the brush spring gets its C-shape.
  • the invention provides that the brush spring in at least a portion of one of the straight areas has a stiffener.
  • a stiffener As a result, an optimal position and / or orientation of the brush body slidably attached to the commutator is always guaranteed. Even at high frictional forces, the act on the brush body or on the brush due to the rotation of the commutator, tilting and / or displacement of the brush body is prevented relative to the commutator.
  • the portion having the stiffening extends over the entire straight region of the brush spring.
  • each of the straight regions of the brush spring has stiffening in at least one section.
  • the stiffening or the section extends over the entire longitudinal extent of the respective straight region.
  • the spring movement of the brush spring is limited to the curved areas, so that substantially only in the curved areas an elastic spring movement can take place.
  • the brush as a whole is stiffened so far that the brush body is always optimally aligned with the commutator, in particular, a tilting and / or twisting of the brush body is prevented, and that it still has sufficient to ensure the function flexibility.
  • At least one of the straight areas is adjacent to the brush body.
  • the brush body is arranged centrally on the stiffening having straight portion of the brush spring.
  • the stiffening is designed as a stiffener produced by plastic deformation. It is therefore provided that the stiffening is formed by a plastic deformation of the brush spring itself. This offers a particularly cost-effective and simple way of producing the advantageous brush.
  • the stiffening is designed as embossing and / or bending stiffening.
  • the embossing stiffener can be formed, for example, by embossing stiffening ribs which extend in the direction of the legs of the brush spring.
  • the bending stiffener can be created, for example, by bending an edge region of the brush spring in the section, in particular by an angle of 90 °, so that a (bending) projection extending in the longitudinal extent of the brush spring is produced.
  • the stiffening is formed on an edge region of the brush spring.
  • the advantageous stiffening can be generated in a simple manner by means of bending and / or embossing, as already stated.
  • the brush spring in the section on a formed by two stiffeners U-profile has two stiffeners, which are advantageously designed as embossing and / or bending stiffener, wherein the stiffeners are aligned or arranged such that the brush spring in the section has a U-profile.
  • a stiffening is provided in the section on each side of the brush spring or on each edge region.
  • the brush spring has an assembly aid.
  • the mounting aid allows for easy mounting of the brush and the commutator, wherein the mounting aid is advantageously designed such that the brush simply pushed onto the commutator or the commutator in an arrangement of one or more advantageous brushes which are attached to a brush holder of the electric machine , can be pushed.
  • the assembly aid is advantageously formed by at least one insertion bevel arranged on the straight region adjacent to the brush body.
  • the insertion bevel causes the brush spring to spring back / back, so that the commutator does not catch on the brush body during assembly.
  • the insertion bevel ensures a "gentle" pushing back of the brush, in particular of the brush head, by the commutator during assembly.
  • the insertion bevel is formed as a spring plate, which is arranged on the brush body adjacent the straight region. The spring plate can be attached in a simple manner on the brush spring, for example by means of gluing, soldering, notching, screwing or the like.
  • the spring plate is formed integrally with the brush spring, wherein the spring plate is preferably produced by means of a stamping-bending process.
  • the spring plate is preferably arranged centrally on the brush spring and formed narrower than the brush spring, so that enough material for the brush spring is available, which ensures the actual function of the brush spring and the desired stiffening.
  • the insertion bevel or the spring plate is also conceivable to arrange the insertion bevel or the spring plate on a curved region of the brush spring.
  • the spring plate of the brush spring to a
  • Kommutatoranliege the brush body arranged obliquely. This ensures that during assembly of the brush body is pushed back so far that he does not hooked to the commutator.
  • an insertion be arranged on several sides of the brush body.
  • the invention relates to an electric machine, which advantageously has at least one brush, as described above.
  • the advantageously designed brush increases the service life of the electrical machine.
  • Figure 1 shows a first embodiment of an advantageous trained
  • Brush for an electric machine shows the brush with an assembly aid
  • Figure 4 shows the brush with the mounting aid in a cross-sectional view
  • Figure 5 shows another embodiment of an advantageous brush for an electrical machine.
  • the brush 1 shows a schematic representation of a first embodiment of a brush 1 for an electrical machine, which is suitable for cooperation with a commutator of the electric machine.
  • the brush 1 has a substantially C-shaped brush spring 2 and a brush body 3 arranged thereon.
  • the brush body 3 is arranged substantially centrally on the brush spring 2, wherein the brush spring 2 has two sides extending away from the brush body 3 legs 4.5, with which the brush spring 2 can be arranged in a brush holder of the electric machine.
  • the brush spring 2 has a straight region 6. This is followed on both sides, that is, on each of the legs 4, 5, a curved portion 7, which is formed approximately semicircular.
  • Each curved region 7 is followed in each case by a short straight region 8.
  • the curved portions 7 are aligned such that the brush body 3 is arranged substantially on the opposite side of the straight portions 8 of the brush spring 2.
  • the brush body 3 Upon application of the brush body 3 with a pressure in the direction of an arrow 9 thus the brush body 3 can be pushed back by a spring movement of the brush spring 2 in the direction of the arrow 9, whereby manufacturing tolerances and wear are compensated.
  • the brush spring 2 With adjoining the areas 8 ends 10 of the legs 4 and 5, the brush spring 2 can be mounted in the brush holder of the electric machine.
  • a portion 11 of the straight portion 6, which extends over the entire length of the straight portion 6, has a stiffener 12.
  • the stiffening 12 is formed by two bending stiffeners 13, 14, which are arranged on each edge region of the brush spring 2.
  • the bending stiffeners 13, 14 are advantageously bent by 90 ° or bent, integrally formed with the brush spring 2 bending projections 15.
  • the stiffener 12 is in this case therefore formed by bending or Abwinkein of the material of the brush spring 2 in the edge region.
  • FIG. 2 shows a further development of the brush 1 shown in FIG. 1, wherein both here and in the following figures from FIG. 1 known elements are provided with the same reference numerals.
  • the brush 1 shown schematically in FIG. 2 differs from that of FIG. 1 in that, in addition to the stiffening 12, it has an assembly aid 16.
  • the mounting aid 16 has two spring plates 17, 18 which are arranged spaced from the brush body 3 on the brush spring 2 and are aligned obliquely so that they of the brush spring 2 on a Kommutatoranliege Chemistry 3 'of the brush body 3, which cooperates with the commutator show ,
  • the spring plates 18 project beyond the brush body 3 with their free ends.
  • the brush body 3 is pushed back in the direction of the arrow 9 by the insertion bevels 19, 20 formed by the spring plates 17, 18, so that the brush body 3 does not get stuck with one of its side surfaces on the commutator or pushes against the commutator.
  • FIG. 3 shows the brush 1 shown in FIG. 2 in a plan view.
  • the stiffening 12 forming bending stiffeners 13 and 14 are clearly visible.
  • the stiffener 12 having portion 11 is smaller than the area 6, or it could be several such sections along the straight portion 6 may be arranged.
  • the brush spring 2 is hereby made wider than the brush body 3, so that the bending stiffeners 13, 14 lead past the brush body 3.
  • the bending stiffeners 13, 14 or the stiffening 12 extends over the entire area 6, there is a particular rigidity of the brush spring 2, in particular in the area of the area 6.
  • the spring plates 17 and 18 of the assembly aid 16 are also formed narrower than the brush spring 2 and thus lie between the bending stiffeners 13 and 14.
  • FIG. 4 shows the brush 1 of FIG. 3 in a cross-sectional view.
  • the spring plates 17, 18 of the insertion bevels 19, 20 can, as shown schematically in Figure 2, on the brush spring 2 by means of gluing, soldering and / or
  • FIG. 5 shows a further exemplary embodiment of the brush 1 in a schematic representation, the brush 1 of FIG. 5 essentially corresponding to the brush 1 from FIG.
  • the main difference is that the C-shaped brush spring 2 does not have a straight portion 6 in which the brush body 3 is arranged, but two obliquely aligned straight portions 21 which form a cup-shaped receptacle 35 22 in the brush spring 2 between them in which the brush body 3 is arranged.
  • the straight portions 21 represent an alternative way to form the mounting aid 16.
  • each of the straight portions 21 has a portion with a stiffener 23, which may be formed as described above. Wherein also the portion comprising the stiffening 23 extends over the entire straight region.
  • the cup-shaped receptacle 22 has, at the side of the brush body 3, two essentially parallel straight regions 24 which are likewise provided with a stiffening 25 along a section.
  • the stiffeners 25 and 23 can also be designed as bending stiffeners, as described above, or as embossing stiffeners.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention concerne un balai pour une machine électrique, comprenant un ressort de balai et au moins un corps de balai disposé sur ce dernier, le ressort de balai ayant essentiellement la forme d'un C et comportant deux branches s'étendant des deux côtés du corps de balai, qui sont utilisées pour disposer le ressort de balai sur un porte-balais d'un moteur électrique, le ressort de balai comportant des zones droites et courbées. Il est prévu que le ressort de balai (2) comporte un renfoncement (12, 23, 25) dans au moins une section (11) d'une des zones droites (6, 21, 24).
EP08786432A 2007-09-25 2008-07-25 Balai pour une machine electrique et machine electrique Withdrawn EP2195891A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710045640 DE102007045640A1 (de) 2007-09-25 2007-09-25 Bürste für eine elektrische Maschine sowie elektrische Maschine
PCT/EP2008/059771 WO2009040163A1 (fr) 2007-09-25 2008-07-25 Balai pour une machine électrique et machine électrique

Publications (1)

Publication Number Publication Date
EP2195891A1 true EP2195891A1 (fr) 2010-06-16

Family

ID=39735336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08786432A Withdrawn EP2195891A1 (fr) 2007-09-25 2008-07-25 Balai pour une machine electrique et machine electrique

Country Status (4)

Country Link
EP (1) EP2195891A1 (fr)
JP (1) JP2010541140A (fr)
DE (1) DE102007045640A1 (fr)
WO (1) WO2009040163A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234004U (fr) * 1975-09-02 1977-03-10
GB2214358A (en) 1988-01-11 1989-08-31 Johnson Electric Ind Mfg A brush leaf assembly for electric motor
DE10207406A1 (de) * 2002-02-21 2003-09-11 K Tec Gmbh Halterung für eine Kohlebürste
DE10223630A1 (de) 2002-05-28 2003-12-11 Valeo Motoren & Aktuatoren Bürste oder Kohlebürste für einen Elektromotor sowie Elektromotor mit einer solchen Bürste
DE102004041490A1 (de) 2004-08-27 2006-03-02 Robert Bosch Gmbh Schleifkörperhalter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009040163A1 *

Also Published As

Publication number Publication date
JP2010541140A (ja) 2010-12-24
DE102007045640A1 (de) 2009-04-02
WO2009040163A1 (fr) 2009-04-02

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