EP0662736B1 - Drehender elektrischer Schleifring mit Mehrdrahtbürsten - Google Patents

Drehender elektrischer Schleifring mit Mehrdrahtbürsten Download PDF

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Publication number
EP0662736B1
EP0662736B1 EP94400681A EP94400681A EP0662736B1 EP 0662736 B1 EP0662736 B1 EP 0662736B1 EP 94400681 A EP94400681 A EP 94400681A EP 94400681 A EP94400681 A EP 94400681A EP 0662736 B1 EP0662736 B1 EP 0662736B1
Authority
EP
European Patent Office
Prior art keywords
rotating electrical
strands
brushes
commutator according
electrical commutator
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.)
Expired - Lifetime
Application number
EP94400681A
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English (en)
French (fr)
Other versions
EP0662736A1 (de
Inventor
Bernard Blanchard
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.)
Everaxis Aerospace and Defence SAS
Original Assignee
Air Precision SA
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 Air Precision SA filed Critical Air Precision SA
Publication of EP0662736A1 publication Critical patent/EP0662736A1/de
Application granted granted Critical
Publication of EP0662736B1 publication Critical patent/EP0662736B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R39/64—Devices for uninterrupted current collection
    • 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
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres

Definitions

  • the invention relates to an electrical collector turning comprising one or more slip rings and at least one multi-strand broom in lateral support sliding against each slip ring, so that allow the transmission of one or more signals electric between two rooms able to be animated by a relative rotational movement.
  • the rotating electrical collectors are devices that transmit one or more several electrical signals between a fixed part or stator, and a moving part or rotor. Such devices are used in many industrial sectors among which we will cite, only as examples, machine tools, transport air, naval and terrestrial, radars, etc.
  • the rotor of a rotating electrical collector includes a number of rings electrically conductive equal to the number of electrical signals that must pass the device. These rings electrically conductive are arranged on an axis electrically insulating and separated from each other by a electrically insulating material.
  • the stator of rotating electrical collectors generally includes, opposite each of electrically conductive rings, at least two brushes most often made up of a strand single electrically conductive continuously rubbing on the corresponding ring.
  • Gorges can be machined on electrically conductive rings for guide the brushes.
  • the electrical collectors single-strand brushes therefore have the main disadvantages the introduction of electrical noise into the signals they transmit, sometimes a lifetime insufficient and a relative linear speed between slip rings and brushes which cannot exceed certain limits.
  • the majority of the strands of the bundle forming a broom is not directly in contact with the slip ring. Therefore, the transmission electrical signals are made from strand to strand up to the slip ring, which is not satisfactory from the point of view of resistance variation of contact.
  • Document EP-A-54 380 describes a rotary electrical collector provided with a multi-strand brush also formed of a large number of metallic wires of very small diameter, applied tangentially in a rectangular groove, in U or V shape of a ring collector.
  • the subject of the invention is precisely a rotating electrical collector with brushes an original design allowing to reduce noticeably the electrical noises due to vibrations, compared to single-wire brushes, while allowing longer service life and higher linear speeds to those allowed with single-wire brushes, without risk creation of short circuits due to breaks broom strands, and whatever the diameter slip rings, in particular for very small collectors used in gyroscopic applications.
  • this result is obtained by means of an electrical collector rotating at multi-strand brooms, suitable for placing between two parts likely to be rotated relative, this collector comprising at least one ring manifold provided with an annular groove, made of an electrically material conductor and carried by a first of said parts and at least one multi-strand broom made of a material electrically conductive and carried by the second piece so as to be in lateral sliding contact against the slip ring, according to a determined bearing force, characterized by the fact that each multi-strand broom includes a bundle of two to five strands juxtaposed, received in the annular groove of the slip ring so that each of them is simultaneously in contact with this throat.
  • multi-strand brushes a limited number of strands arranged so as to be all in contact with the annular groove of the ring collector significantly reduces variations dynamic electrical resistance to surfaces of contact, in particular by providing self-damping vibrations. This results in a significant decrease electrical noise generated in the collector as well as a marked improvement in service life and linear speeds likely to be reached, compared to single-wire brush collectors.
  • limiting the number of strands constituting each broom at a very low number allows to give these strands a sufficient diameter to avoid any risk of rupture likely to produce unacceptable short circuits in the collector.
  • each multi-strand broom further includes a base having a receptacle in which is received one end of the bundle and a support force adjustment rod, carrying the receptacle and able to be fixed on a terminal block of the second room.
  • This rod is advantageously a rod straight folded to form an angle that determines the support force.
  • the strands are welded in a blind hole in receptacle.
  • each broom present either a section V-shaped, i.e. a U-shaped section.
  • two the brushes are preferably in sliding lateral support, opposite direction, in each of the annular grooves.
  • the rotating electric collector illustrated schematically in Figure 1 comprises a rotor 10 and a stator 12.
  • the rotor 10 mainly comprises an axis 14, made of an electrically insulating material, on which are fitted with slip rings 16, made of an electrically conductive material. These slip rings 16 are separated from each other others by electrically insulating rings 18.
  • the number of rings 16 and 18 can be any and basically depends on the number of signals to be transmitted through the collector.
  • each of the slip rings 16 electrical conductors inside the axis 14, so as to connect each of the slip rings 16 to systems capable of receive or transmit electrical signals by the rings.
  • the axis 14 of the rotor 10 is supported by two flanges 22 of stator 12, via two bearings 24.
  • the stator 12 of the rotating electrical collector further comprises a tubular piece 26 which connects between them the two flanges 22 coaxially with the axis 14, around slip rings 16 and insulating rings 18.
  • the tubular part 26 carries a terminal block 27 in one electrically insulating material, supporting blades conductive.
  • This terminal block 27 supports, in a cutting plane radially each of the slip rings 16, two multi-strand brushes 28 which are arranged so as to be in sliding lateral support, in opposite direction, on the corresponding slip ring 16. More precisely, each pair of brushes 28 is supported in a groove of guide 30 of the corresponding slip ring 16, this groove 30 advantageously having a section V-shaped ( Figure 3) or U-shaped ( Figure 4). Fixation two brushes 28 of the same pair on the terminal block 27 is carried out in two neighboring locations, such so that the brushes 28 are arranged symmetrically with respect to a plane passing through the geometric axis of axis 14.
  • each of the multi-strand brushes 28 comprises a bundle of n juxtaposed strands, n being able to vary between 2 and 5 and being advantageously equal to 3, as illustrated in the figures.
  • the strands 32 are all identical and they are made of an electrically conductive material, mechanically resistant and having good elasticity. This material can in particular consist of a metallic alloy such as a gold-based alloy.
  • each of the strands 32 of the broom 28 is advantageously between 0.15 mm and 0.25 mm. This dimension avoids any risk of breakage and therefore short circuit inside the collector, without significantly increasing the size of the brushes.
  • Each of the multi-strand brushes 28 includes plus a base 34 by which the strands 32 are mounted on terminal block 27 of the stator.
  • This base 34 is made of an electrically conductive material such than brass.
  • a first end of the beam formed by the strands 32 is embedded in a blind hole formed in a tubular receptacle 36 constituting a part of the base 34.
  • the base 34 further comprises a rod 38 which is aligned with the strands 32 when these the latter are embedded in receptacle 36.
  • the three strands 32 of each of the brushes are embedded in the blind hole of receptacle 36 and they are welded to it by welding 40.
  • This welding 40 can be carried out electrically.
  • the strands 32 are then straight and aligned with the rod 38 as shown in solid line in Figure 2.
  • the rod 38 is bent at a determined angle, in a plane perpendicular to the geometric axis of axis 14, as shown in dashed lines in the figure 2. This angle is such that when the rotor is in place, the strands 32 of the brush 28 are in lateral support sliding in the groove 30 of the corresponding ring 16, by undergoing a certain outward bending which determines the support force.
  • groove 30 with V-shaped section has been replaced by a U-shaped section groove.
  • characteristic notably improves the distribution between the strands 32 of the loads due to the force with which the brush is applied against the groove, while preserving the guiding effect provided by this throat.

Landscapes

  • Motor Or Generator Current Collectors (AREA)

Claims (9)

  1. Drehender elektrischer Schleifring mit Mehrdrahtbürsten, geeignet zwischen zwei Teilen (10,12) angebracht zu werden, die eine Relativdrehbewegung ausführen, wobei dieser Schleifring wenigstens einen mit einer Ringnut (30) versehenen Kollektorring (16) umfaßt, hergestellt aus einem elektrisch leitenden Material und getragen durch ein erstes der genannten Teile, und wenigstens eine Mehrdrahtbürste (28), hergestellt aus einem elektrisch leitenden Material und derart durch das zweite Teil (12) getragen, daß sie, sich mit einer bestimmten Abstützkraft seitlich abstützend, auf dem Kollektorring gleitet,
    dadurch gekennzeichnet,
    daß jede Mehrdrahtbürste (28) ein Bündel von zwei bis fünf derart in einer Ringnut (30) des Kollektorrings (16) nebeneinanderliegende Bürstendrähte (32) aufweist, daß jeder von ihnen simultan Kontakt hat mit dieser Nut.
  2. Drehender elektrischer Schleifring nach Anspruch 1, dadurch gekennzeichnet, daß jede Mehrdrahtbürste (28) drei nebeneinanderliegende Bürstendrähte (32) umfaßt.
  3. Drehender elektrischer Schleifring nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß jede Mehrdrahtbürste (28) zudem einen Sockel (34) umfaßt, gebildet durch eine Fassung (36) für das Ende des Bündels, und einen Stift (38) zur Einstellung der Abstützkraft, der die Fassung trägt und in einer Befestigungseinrichtung (27) des zweiten Teils (12) festgemacht werden kann.
  4. Drehender elektrischer Schleifring nach Anspruch 3, dadurch gekennzeichnet, daß der Stift (38) ein gerader Stift ist, der umgebogen wird, um einen Winkel zu bilden, der die Abstützkraft bestimmt.
  5. Drehender elektrischer Schleifring nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, daß die Bürstendrähte (32) in ein Grund- bzw. Sackloch der Fassung (36) gelötet sind.
  6. Drehender elektrischer Schleifring nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Bürstendrähte (32) denselben runden Querschnitt aufweisen, mit einem Durchmesser zwischen ungefähr 0,15mm und ungefähr 0,25mm.
  7. Drehender elektrischer Schleifring nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Ringnut (30) einen U-förmigen Querschnitt aufweist.
  8. Drehender elektrischer Schleifring nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ringnut (30) einen V-förmigen Querschnitt aufweist.
  9. Drehender elektrischer Schleifring nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß in jeder der Ringnuten (30) zwei Bürsten (28), seitlich gleitend, sich entgegengesetzt abstützen.
EP94400681A 1994-01-10 1994-03-30 Drehender elektrischer Schleifring mit Mehrdrahtbürsten Expired - Lifetime EP0662736B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400165 1994-01-10
FR9400165A FR2715005B1 (fr) 1994-01-10 1994-01-10 Collecteur électrique tournant à balais multibrins.

Publications (2)

Publication Number Publication Date
EP0662736A1 EP0662736A1 (de) 1995-07-12
EP0662736B1 true EP0662736B1 (de) 1998-11-18

Family

ID=9458875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94400681A Expired - Lifetime EP0662736B1 (de) 1994-01-10 1994-03-30 Drehender elektrischer Schleifring mit Mehrdrahtbürsten

Country Status (3)

Country Link
EP (1) EP0662736B1 (de)
DE (1) DE69414687T2 (de)
FR (1) FR2715005B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140014C1 (de) * 2001-08-09 2002-10-31 Schleifring Und Appbau Gmbh Aufnahmevorrichtung für Schleifkontakte

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1003192C1 (nl) * 1996-05-23 1997-11-25 Precisie Ind Van Den Akker B V Sleepringenwals.
DE10111403B4 (de) * 2001-03-09 2008-07-24 G. Dietrich Gmbh Vorrichtung zum Übertragen bzw. zum Abnehmen von Strom auf wenigstens einen bzw. von wenigstens einem Schleifring
DE10158381B4 (de) * 2001-11-28 2005-01-05 Stemmann-Technik Gmbh Schleifringübertrager
DE10215809B4 (de) * 2002-04-10 2008-09-25 Schleifring Und Apparatebau Gmbh Schleifkontaktanordnung
DE102008001361A1 (de) * 2008-04-24 2009-11-05 Schleifring Und Apparatebau Gmbh Mehrfachbürste für Schleifringe
DE102011006820A1 (de) 2011-04-06 2012-10-11 Schleifring Und Apparatebau Gmbh Vibrationsfeste Schleifringanordnung
DE102011101621A1 (de) * 2011-05-14 2012-11-15 Ltn Servotechnik Gmbh Schleifringeinheit
DE102011077358B3 (de) * 2011-06-10 2012-12-06 Schleifring Und Apparatebau Gmbh Schwingungsunempfindlicher Bürstenblock für Schleifringe
DE102011051804B4 (de) * 2011-07-13 2013-09-19 Schleifring Und Apparatebau Gmbh Schleifringbürste mit galvanischem Multischichtsystem
WO2013030563A1 (en) * 2011-08-26 2013-03-07 Overview Limited Improved slip ring apparatus and method of manufacturing a slip ring
FR2980921B1 (fr) * 2011-10-03 2013-10-11 Centre Nat Etd Spatiales Collecteur electrique a gaines tubulaires d'isolation mecaniquement independantes des cils.
DE102012200561A1 (de) 2012-01-16 2013-07-18 Wobben Properties Gmbh Schleifringübertrager
DE102012203842B3 (de) * 2012-03-12 2013-09-05 Schleifring Und Apparatebau Gmbh Schleifringbürste und Halter für Schleifringbürste
DE102012204829B4 (de) 2012-03-12 2025-04-30 Schleifring Gmbh Schleifringbürsten in Einpresstechnik, Bürstenhalter, Bürstenblock und Schleifringanordnung sowie Verfahren zur Montage der Schleifringbürste
EP2696449B1 (de) 2012-08-06 2015-02-25 Schleifring und Apparatebau GmbH Schleifring mit integrierter Heizvorrichtung
EP2696442A1 (de) 2012-08-06 2014-02-12 Schleifring und Apparatebau GmbH Multifunktionales Schleifringgehäuse
CN105393413B (zh) 2013-05-17 2019-01-04 史莱福灵有限公司 用于多纤维电刷的高电流滑环
EP2924817B1 (de) 2014-03-27 2018-08-29 Schleifring GmbH Schleifring mit aktiver Kühlung
DE102014115291A1 (de) 2014-10-21 2016-05-12 Ebm-Papst Mulfingen Gmbh & Co. Kg Erdungsvorrichtung
EP3293836B1 (de) 2016-09-08 2019-04-17 Schleifring GmbH Verfahren zur herstellung von kontaktdrahten für schleifringe, vorrichtung zur herstellung von kontaktdrahten für schleifringe und kontaktdrahten für schleifringe
EP3454435B1 (de) 2017-09-06 2019-09-04 Schleifring GmbH Stabilisierte golddrahtbürste für schleifringe
EP3480901B1 (de) * 2017-11-06 2020-02-19 Schleifring GmbH Schwingungsdämpfende vorrichtung für gleitringbürsten
CN108321650A (zh) * 2017-12-29 2018-07-24 杭州驰宏科技有限公司 一种旋转连接器
IT202000014803A1 (it) * 2020-06-19 2021-12-19 R M D Components Italia S R L Avvolgitore per ricaricare un veicolo elettrico o ibrido
CN114976800B (zh) * 2022-05-24 2025-11-18 中航光电科技股份有限公司 一种带逆止功能的导电滑环
DE102024200968A1 (de) * 2024-02-02 2025-08-07 Schaeffler Technologies AG & Co. KG Rotorwellenabschnitt, Elektromotor-Antriebseinheit und Fahrzeug
DE102024000926A1 (de) * 2024-03-21 2025-09-25 Venturetec Rotating Systems Gmbh Geteilter Schleifringbürstenhalter
CN119742638A (zh) * 2025-03-06 2025-04-01 中航光电科技股份有限公司 一种具有刷丝压力调节功能的导电滑环

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JPS5714535Y2 (de) * 1977-09-08 1982-03-25
JPS5612837A (en) * 1979-07-13 1981-02-07 Hitachi Ltd Brush unit
US4398113A (en) * 1980-12-15 1983-08-09 Litton Systems, Inc. Fiber brush slip ring assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140014C1 (de) * 2001-08-09 2002-10-31 Schleifring Und Appbau Gmbh Aufnahmevorrichtung für Schleifkontakte
FR2828592A1 (fr) * 2001-08-09 2003-02-14 Schleifring Und Appbau Gmbh Dispositif de fixation pour collecteurs electriques

Also Published As

Publication number Publication date
EP0662736A1 (de) 1995-07-12
DE69414687T2 (de) 1999-06-10
FR2715005B1 (fr) 1996-03-22
DE69414687D1 (de) 1998-12-24
FR2715005A1 (fr) 1995-07-13

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