EP1788670B1 - Porte-balai pour le moteur électrique d'un outil - Google Patents

Porte-balai pour le moteur électrique d'un outil Download PDF

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Publication number
EP1788670B1
EP1788670B1 EP05025221A EP05025221A EP1788670B1 EP 1788670 B1 EP1788670 B1 EP 1788670B1 EP 05025221 A EP05025221 A EP 05025221A EP 05025221 A EP05025221 A EP 05025221A EP 1788670 B1 EP1788670 B1 EP 1788670B1
Authority
EP
European Patent Office
Prior art keywords
brush
guide housing
brush holder
holding means
holder according
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.)
Not-in-force
Application number
EP05025221A
Other languages
German (de)
English (en)
Other versions
EP1788670A1 (fr
Inventor
Markus Dr.-Ing. Johnen
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Priority to AT05025221T priority Critical patent/ATE412997T1/de
Priority to DE502005005826T priority patent/DE502005005826D1/de
Priority to EP05025221A priority patent/EP1788670B1/fr
Publication of EP1788670A1 publication Critical patent/EP1788670A1/fr
Application granted granted Critical
Publication of EP1788670B1 publication Critical patent/EP1788670B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R39/383—Brush holders characterised by the electrical connection to the brush holder

Definitions

  • the present invention relates to a brush holder for an electric motor, in particular of a power tool with the features of the preamble of claim 1.
  • Such a brush holder is known from DE-A-37 26 894 , which is considered to be the closest prior art, and EP-A-0 874 424 ,
  • the abrasive brush which is usually designed as a carbon brush, is in the operating state of a concentric grinding surface on the jacket of a commutator.
  • the longitudinal displacement of the brush is given to the commutator in the radial direction.
  • the brush is usually biased by a brush spring radially inward toward the grinding surface of the commutator.
  • the present invention has for its object to counteract this problem effectively.
  • the portion of the brush strand extending between the holding device and the grinding brush can no longer get caught on other parts of the device. If the part of the brush strand extending beyond the retaining device hooks behind somewhere, this no longer has any influence on the longitudinal displaceability of the brush in the guide housing.
  • the exposed between the fixture and the brush surface portion of the brush strand is chosen so long that it allows a corresponding feeding of the brush over the entire intended wear and tear. It does not come to the previously mentioned "hanging" the brush from the brush strand.
  • the holding device could be designed in any desired manner, as long as it fulfills the aforementioned purpose.
  • the holding device acts by clamping with the brush strand.
  • a screwable against a jaw clamping screw could be provided.
  • the holding device is designed so that the brush strand can be clamped without tools.
  • the holding device has an open-edge clamping opening.
  • This clamping opening could for example be slit-shaped, so that the brush strand can be inserted into the elongated slot and jammed therein.
  • the clamping opening may have a round clear cross-sectional area at least in one section.
  • the holding device transversely to Longitudinal direction of the brush extends away from the guide housing. In this way, space is created within which the brush strand can be kept trackable.
  • the holding device can receive the brush strand in a fixing manner at its free end.
  • the brush strand can then extend in any way away from the brush in the direction of working circuit of the electric motor. It would be particularly conceivable that the brush strand is connected directly to the live contact (of the switch or the field coil), so that no additional contact points are required.
  • the system according to the invention with the shaft or quiver-like guide housing with holding device and brush is easier to mount than known systems, as a total of fewer contacts must be made. Therefore, the system is less error prone; Plug connections tend to fail under the influence of temperature and vibration.
  • the guide housing comprises a sheet metal material and the holding device comprises a notched from a wall of the guide housing web. In this way it is possible to realize a one-piece design of the holding device and the guide housing in a particularly simple manner.
  • Brush strand extends from the grinding brush to the outside and to the holding device.
  • the guide housing has supports for a spring means, which loads the brush in the radial direction, wherein the supports are formed integrally with the guide housing or attached to the guide housing.
  • the figures show a brush holder 2 according to the invention as a preassembled assembly 4, in particular for use in a power tool.
  • the assembly 4 comprises a quiver-shaped or shaft-shaped guide housing 6 and an abrasive brush 8 inserted therein in the form of a carbon brush. From the grinding brush 8 leads a brush strand 10 away to a holding device 12, where the brush strand 10 is fixed by clamping. From there the bristle leads to a contact, not shown, of the working circuit of an electric motor.
  • the holding device 12 is formed from a notched from a wall 14 of the guide housing 6 web 16.
  • the web 16 has at its free end an open-edge clamping opening 18 in which the brush strand 10 is at least so clamped that at a certain Tensile stress on the strand 10 this remains in its position shown in the figures, so that a sufficient strand length in the area between the holding device 12 and the brush 8 remains, which allows tracking of the brush 8 in the direction of arrow 20.
  • the brush strand 10 extends from the grinding brush 8 through a slot 22 in the wall 14 of the guide housing 6, which is formed by the notching of the web 16.
  • a spring 24 which biases the brush 8 in the direction of the arrow 20, that is to say in the radial direction onto the commutator (not shown), and at the other end is fixed to bent retaining tongues of the guide housing 6.

Claims (13)

  1. Porte-balais (2) pour un moteur électrique d'un dispositif d'outillage, comprenant un boîtier de guidage (6) en tôle, recevant un balai (8) de façon mobile en longueur, dans lequel un dispositif de maintien (12) pour fixer le fil torsadé de balai (10) est prévu sur le boîtier de guidage (6) de telle sorte qu'il existe une longueur suffisante de fil torsadé pour l'avance du balai (8), caractérisé en ce que le dispositif de maintien (12) comprend une barrette (16) désenclenchée d'une paroi (14) du boîtier de guidage (6) et en ce que le désenclenchement de la barrette (16) forme dans la paroi (14) du boîtier de guidage (6) une fente (22) à travers laquelle s'étend le fil torsadé de balai (10) en partant du balai (10) vers l'extérieur et jusqu'au dispositif de maintien (12) et en ce que le fil torsadé de balai est connecté directement à un contact sous tension, de sorte qu'aucun point de contact supplémentaire n'est plus nécessaire.
  2. Porte-balais selon la revendication 1, caractérisé en ce que le dispositif de maintien (12) coopère par serrage avec le fil torsadé de balai (10).
  3. Porte-balais selon la revendication 2, caractérisé en ce que le dispositif de maintien (12) est réalisé de telle sorte que le fil torsadé de balai (10) peut y être connecté sans outil.
  4. Porte-balais selon la revendication 2 ou 3, caractérisé en ce que le dispositif de maintien (12) présente une ouverture de serrage (18) à bord ouvert.
  5. Porte-balais selon la revendication 4, caractérisé en ce que l'ouverture de serrage (18) se rétrécit dans la direction d'enfichage.
  6. Porte-balais selon la revendication 5, caractérisé en ce que l'ouverture de serrage (18) s'élargit de nouveau légèrement après le rétrécissement.
  7. Porte-balais selon la revendication 4, 5 ou 6, caractérisé en ce que l'ouverture de serrage présente au moins dans une section une aire de section libre ronde.
  8. Porte-balais selon une ou plusieurs des revendications précédentes, caractérisé en ce que le dispositif de maintien (12) s'éloigne du boîtier de guidage (6) en s'étendant transversalement à la direction de déplacement longitudinal (20) du balai (10).
  9. Porte-balais selon une ou plusieurs des revendications précédentes, caractérisé en ce que le dispositif de maintien (12) reçoit à son extrémité libre le fil torsadé (10) en le fixant.
  10. Porte-balais selon une ou plusieurs des revendications précédentes, caractérisé en ce que le dispositif de maintien (12) est réalisé d'une seule pièce avec le boîtier de guidage (6).
  11. Porte-balais selon une ou plusieurs des revendications précédentes, caractérisé en ce que le boîtier de guidage (6) présente d'autres languettes d'appui pour des moyens de ressort (24) qui sont réalisées d'une seule pièce avec le boîtier de guidage (6) ou sont rapportées au boîtier de guidage (6).
  12. Porte-balais selon une ou plusieurs des revendications précédentes en tant que sous-ensemble pouvant être préassemblé (4) pour un dispositif d'outillage électrique, composé d'un boîtier de guidage (6) avec un dispositif de maintien (12), d'un balai (8) mis en place dans celui-ci avec un fil torsadé (10) menant au dispositif de maintien (12) et un ressort de balai (24) sollicitant le balai (8).
  13. Dispositif d'outillage électrique avec un moteur électrique présentant un commutateur, caractérisé par un porte-balais (2) selon une ou plusieurs des revendications précédentes.
EP05025221A 2005-11-18 2005-11-18 Porte-balai pour le moteur électrique d'un outil Not-in-force EP1788670B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT05025221T ATE412997T1 (de) 2005-11-18 2005-11-18 Bürstenhalter für elektromotor eines werkzeuggeräts
DE502005005826T DE502005005826D1 (de) 2005-11-18 2005-11-18 Bürstenhalter für Elektromotor eines Werkzeuggeräts
EP05025221A EP1788670B1 (fr) 2005-11-18 2005-11-18 Porte-balai pour le moteur électrique d'un outil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05025221A EP1788670B1 (fr) 2005-11-18 2005-11-18 Porte-balai pour le moteur électrique d'un outil

Publications (2)

Publication Number Publication Date
EP1788670A1 EP1788670A1 (fr) 2007-05-23
EP1788670B1 true EP1788670B1 (fr) 2008-10-29

Family

ID=36090767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05025221A Not-in-force EP1788670B1 (fr) 2005-11-18 2005-11-18 Porte-balai pour le moteur électrique d'un outil

Country Status (3)

Country Link
EP (1) EP1788670B1 (fr)
AT (1) ATE412997T1 (fr)
DE (1) DE502005005826D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012102810A1 (de) * 2012-03-30 2013-10-10 Valeo Wischersysteme Gmbh Scheibenwischermotor und Kohlehalteplatte für einen Scheibenwischermotor
FR2996369B1 (fr) * 2012-09-28 2016-06-03 Valeo Equip Electr Moteur Cage a balai pour porte-balai de machine electrique et porte-balais correspondant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3726894A1 (de) * 1986-08-13 1988-02-18 Schunk Motorensysteme Halter fuer eine schleifkohle
JPH0732568B2 (ja) 1989-05-16 1995-04-10 アスモ株式会社 モータのブラシ保持構造
DE4307451A1 (de) 1993-03-10 1994-09-15 Bosch Gmbh Robert Bürstenhalter für mechanisch kommutierte Elektromotoren
DE19717186A1 (de) * 1997-04-24 1998-10-29 Schunk Motorensysteme Halter für eine Schleifkohle
DE10126677A1 (de) * 2001-06-01 2002-12-05 Bosch Gmbh Robert Elektrische Kommutatormaschine

Also Published As

Publication number Publication date
EP1788670A1 (fr) 2007-05-23
ATE412997T1 (de) 2008-11-15
DE502005005826D1 (de) 2008-12-11

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