WO2005011088A2 - Porte-balais de moteur electrique, moteur electrique et actionneur. - Google Patents
Porte-balais de moteur electrique, moteur electrique et actionneur. Download PDFInfo
- Publication number
- WO2005011088A2 WO2005011088A2 PCT/FR2004/050353 FR2004050353W WO2005011088A2 WO 2005011088 A2 WO2005011088 A2 WO 2005011088A2 FR 2004050353 W FR2004050353 W FR 2004050353W WO 2005011088 A2 WO2005011088 A2 WO 2005011088A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electric motor
- brushes
- brush holder
- brush
- guiding
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
- H02K5/148—Slidably supported brushes
Definitions
- Brush holder for electric motor, electric motor and actuator.
- the present invention relates to an electric motor brush holder, an electric motor provided with this brush holder and an actuator provided with this motor. More specifically, the invention relates to a brush holder for an electric motor, of the type described in FR-A-2715519, comprising supply brushes and means for electrically connecting these brushes to supply means, each brush comprising: a first end intended to be in contact with a collector, located in a first zone; a second end to which the connection means are connected, located in a second zone.
- This type of brush holder can be used in a motor for gearbox actuator. In a robotic gearbox, the actuators are used to change gears automatically. At each gear change, the actuator is requested. The life of the actuator is limited by the wear of the brushes.
- the invention aims to remedy these drawbacks by providing a brush holder for an electric motor which is less sensitive to particles created by the wear of the brushes than the brush holders of the prior art.
- the invention relates to a brush holder of an electric motor of the aforementioned type, characterized in that the two zones are separated by separation means that are impervious to particles detaching from the brushes.
- the particles detaching from the brushes due to wear remain confined in the first zone and cannot spread towards the second zone which contains elements sensitive to the particles of the brushes. Consequently, the proper functioning of the engine is not disturbed by these particles and its service life is thus increased.
- An electric motor brush holder may also include one or more of the following characteristics: - the separation means comprise means for guiding the particles along preferential paths; the brushes are carried by a support and the separation means are provided on a cover cover of the support; the support comprises means for guiding the brushes, the brushes are distributed regularly in a circle, and the cover comprises a wall forming a funnel, of contour interrupted by housings through which extend the means for guiding the brushes; the means for guiding the particles include reliefs formed on the surface of the wall forming a funnel delimiting the first zone; the funnel wall has a general shape of a truncated cone of revolution; the reliefs are ribs parallel to a generatrix of the cone; the cover comprises an annular face provided with a radially external edge extended towards the support by a skirt and a radially internal edge extended towards the support by the wall forming a funnel;
- the invention also relates to an electric motor comprising a brush holder as defined above.
- the invention also relates to a direct current motor comprising a brush holder as defined above.
- the invention also relates to an actuator for a gearbox, for example robotized, which comprises an electric motor as defined above.
- the invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the drawings in which: - Figure 1 is a sectional diagram of an actuator provided with a electric motor provided with a brush holder according to the invention;
- Figure 2 is a diagram of a brush holder according to the invention;
- - Figure 3 is a diagram of a brush holder provided with a cover according to the invention.
- FIG. 1 An actuator for a gearbox designated by the general reference 10, provided with an electric motor 12 is shown in FIG. 1.
- the actuator 10 comprises a housing 14 inside which is housed the electric motor 12.
- the housing 14 comprises a bell-shaped body 16 provided with a blind end and an open end closed by a cover forming a brush holder 18.
- the brush holder 18 therefore has an external face and an internal face on which the brushes are arranged 20.
- the electric motor 12, housed inside the housing 14, is for example a direct current motor.
- This motor conventionally comprises: a stator 22 provided with means for producing magnetic fields; a rotor 24 provided with windings, carried by a shaft 26 of axis substantially orthogonal to the brush holder 18, and of a collector 28 carried by the shaft 26; a brush holder 18 of general shape of revolution.
- the shaft 26 passes through the brush holder 18 in its center and therefore has two ends respectively internal and external to the housing 14.
- the shaft 26 of the rotor is guided in rotation by means in particular of a bearing 30, carried by the end blind end of the housing 14, surrounding the internal end of the shaft 26.
- the external end of the shaft 26 forms a coupling end with a control member of the gearbox.
- the brush holder 18 shown in more detail in Figure 2, comprises a support 32 on which are arranged radially four supply brushes 20 distributed regularly in a circle.
- These brushes 20 are of the conventional type, generally made of graphite, and have a parallelepiped shape. Their radially inner end is in contact with the manifold 28 and their radially outer end is in contact with return springs 34 and electrical connection means 36 which will be described later.
- the brushes 20 are movable along a radially oriented slide connection. This slide link is embodied by means 38 for guiding the brushes which are called brush guides.
- These brush guides 38 each have a form of tube open at the ends and are oriented radially.
- the return springs 34 exert on the brushes 20 a radial force oriented towards the axis of the rotor 24 and make it possible to ensure permanent contact of the brushes 20 on the collector 28.
- the electrical connection means 36 preferably comprise electrical braids 40 stripped and possibly electronic components (for example capacitors) participating in the interference suppression (not shown). These electrical connection means 36 are connected to supply means 42 comprising in particular a connection pin 43 disposed on the support 32 of the brush holder 18, outside the housing 14 of the actuator 10. A cover 44 covering the brush holder 18 is shown in detail in FIG. 3.
- This cover 44 of generally annular shape, comprises an annular face 46 provided with a radially external edge extended towards the support by a skirt 48, and with a radially edge internal extended towards the support by a wall forming a funnel 50 of circular contour interrupted by extensions 52 covering the brush guides 38.
- the contour 50 is therefore interrupted by housings through which the brush guides 38 extend.
- the wall forming funnel 50 has the shape of a truncated cone of revolution, of circular base, and whose axis substantially coincides with the axis of rotation of the rotor 24 of the motor.
- the wall forming the funnel 50 has a generally convergent shape towards the support 32 of the brush holder 18, that is to say towards the outside of the housing 14 of the actuator 10.
- the cover 44 forms means impervious to particles detaching from the brushes, and separates the brush holder 18 into two zones.
- the ends of the brushes 20 in contact with the collector 28 extend in the first zone while the return springs 34, the electronic components and the radially external ends of the brushes are in the second zone.
- the extensions 52 of the funnel wall 50 are in contact with the brush guides 38 so that the particles detaching from the brushes 20 cannot pass between the brush guides 38 and the funnel wall 50.
- the elements located in the second zone are therefore protected from particles detaching from the brushes, these particles flowing only in the first zone.
- the cover 44 includes ribs 54 which extend in the first zone, substantially parallel to a generator of the cone and which serve as means for guiding the particles detaching from the ends of the brushes 20 in contact with the collector 28.
- ribs 54 form protruding reliefs integral with the wall forming a funnel 50, and optionally the annular face 46, between the extensions 52 covering the brush guides 38.
- the cover 44 preferably comprises at least one rib 54, for example two ribs 54, between two consecutive brooms.
- the invention is not limited to the embodiment described above. In particular, it is possible to remove the extensions 52, and the reliefs 54 may be protruding or hollow.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04767914A EP1647082A2 (fr) | 2003-07-23 | 2004-07-23 | Porte-balais de moteur electrique, moteur electrique et actionneur |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0309023 | 2003-07-23 | ||
| FR0309023A FR2858124B1 (fr) | 2003-07-23 | 2003-07-23 | Porte-balais de moteur electrique, moteur electrique et actionneur |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2005011088A2 true WO2005011088A2 (fr) | 2005-02-03 |
| WO2005011088A3 WO2005011088A3 (fr) | 2005-04-21 |
Family
ID=33561041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2004/050353 Ceased WO2005011088A2 (fr) | 2003-07-23 | 2004-07-23 | Porte-balais de moteur electrique, moteur electrique et actionneur. |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1647082A2 (fr) |
| CN (1) | CN100461587C (fr) |
| FR (1) | FR2858124B1 (fr) |
| WO (1) | WO2005011088A2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102113186B (zh) * | 2008-07-24 | 2014-06-25 | 法雷奥电机设备公司 | 用于机动车起动器的电刷装置 |
| DE102010062727A1 (de) * | 2010-12-09 | 2012-06-14 | Robert Bosch Gmbh | Elektromotorantrieb |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4355253A (en) | 1981-02-27 | 1982-10-19 | Briggs & Stratton Corp. | Combination end bell and brush holder for a dynamoelectric machine |
| FR2715519A1 (fr) | 1994-01-26 | 1995-07-28 | Rockwell Bcs France | Ensemble de moteur électrique à aimants permanents et à double sens de rotation. |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1339113A (fr) * | 1962-10-29 | 1963-10-04 | Boîte de vitesses pour véhicules automobiles | |
| DE3341230A1 (de) * | 1983-11-14 | 1985-05-30 | Siemens AG, 1000 Berlin und 8000 München | Universalmotor, insbesondere fuer waschmaschinen |
| FR2603141A1 (fr) * | 1986-08-22 | 1988-02-26 | Marchal Equip Auto | Dispositif porte-balais pour machine electrique tournante, et machine electrique equipee d'un tel dispositif porte-balais |
| GB9814690D0 (en) * | 1998-07-08 | 1998-09-02 | Johnson Electric Sa | Dust guard |
| US6417595B1 (en) * | 2000-05-24 | 2002-07-09 | Mcmillan Electric Company | Spark suppression dust sealing for a motor apparatus |
| EP1372244B1 (fr) * | 2001-02-27 | 2013-05-01 | Mitsubishi Denki Kabushiki Kaisha | Dispositif de soupape de recirculation des gaz de carter |
-
2003
- 2003-07-23 FR FR0309023A patent/FR2858124B1/fr not_active Expired - Fee Related
-
2004
- 2004-07-23 WO PCT/FR2004/050353 patent/WO2005011088A2/fr not_active Ceased
- 2004-07-23 CN CNB200480020870XA patent/CN100461587C/zh not_active Expired - Fee Related
- 2004-07-23 EP EP04767914A patent/EP1647082A2/fr not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4355253A (en) | 1981-02-27 | 1982-10-19 | Briggs & Stratton Corp. | Combination end bell and brush holder for a dynamoelectric machine |
| FR2715519A1 (fr) | 1994-01-26 | 1995-07-28 | Rockwell Bcs France | Ensemble de moteur électrique à aimants permanents et à double sens de rotation. |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1647082A2 (fr) | 2006-04-19 |
| CN1826716A (zh) | 2006-08-30 |
| CN100461587C (zh) | 2009-02-11 |
| WO2005011088A3 (fr) | 2005-04-21 |
| FR2858124A1 (fr) | 2005-01-28 |
| FR2858124B1 (fr) | 2005-11-18 |
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