EP2831961B1 - Bloc de balais pour système de bague collectrice - Google Patents

Bloc de balais pour système de bague collectrice Download PDF

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Publication number
EP2831961B1
EP2831961B1 EP13711857.6A EP13711857A EP2831961B1 EP 2831961 B1 EP2831961 B1 EP 2831961B1 EP 13711857 A EP13711857 A EP 13711857A EP 2831961 B1 EP2831961 B1 EP 2831961B1
Authority
EP
European Patent Office
Prior art keywords
carrier
brush block
spring
block according
contact
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
EP13711857.6A
Other languages
German (de)
English (en)
Other versions
EP2831961A1 (fr
Inventor
Peter Pollner
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.)
Schleifring und Apparatebau GmbH
Original Assignee
Schleifring und Apparatebau 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 Schleifring und Apparatebau GmbH filed Critical Schleifring und Apparatebau GmbH
Publication of EP2831961A1 publication Critical patent/EP2831961A1/fr
Application granted granted Critical
Publication of EP2831961B1 publication Critical patent/EP2831961B1/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
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing
    • 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
    • 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
    • H01R39/36—Connections of cable or wire to brush
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • 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

Definitions

  • the invention relates to a brush block and a slip ring assembly for transmitting electrical signals by means of sliding contacts between mutually rotatable parts.
  • a sliding track made of electrically conductive material
  • at least one sliding contact also called a brush
  • a brush block are soldered in the spring wires in a circuit board, for example, from DE 20115 215 U1 or even from the US 4,583,797 known.
  • the production is relatively simple, with a precise positioning of the individual brush wires is hardly possible.
  • the durability under continuous load is not satisfactory because the solder joints break up over time.
  • a slip ring brush which is soldered to the top of a circuit board.
  • solder from the underside of the circuit board is trying to obtain a large-scale solder joint, which should then achieve a sufficient mechanical strength.
  • a disadvantage of this brush block is that in addition to the complex manufacturing process, due to the large support length of the brush wire on the circuit board and to avoid transverse forces on the solder joint only a U-shaped brush assembly can be realized. As a result, two brushes are at opposite locations the slideway, which requires a lot of installation space and allows only two brushes per slideway.
  • the DE 10158 381 B4 discloses a slip ring transmitter in which a contact spring is secured to a circuit board by a clamping mechanism.
  • JP 2010-232139A a generic arrangement is disclosed, wherein the brush wires are soldered in vias.
  • EP 1 531 528 A1 and EP 1 610 425 A1 show more brush blocks.
  • the invention has for its object to design a brush block and a slip ring assembly such that it allows long-term stable fixation of the brushes and secure contact.
  • this brush block and this slip ring assembly should be easy and inexpensive to produce, and have a long life and reliability.
  • a flexible brush assembly and in particular a space-saving V-shaped brush arrangement should be possible, in which a plurality of brush blocks can be attached to a slip ring.
  • An inventive brush block for a sliding track comprises at least one carrier, which is preferably a printed circuit board. Furthermore, the brush block comprises at least one spring clip, which is electrically contacted on the carrier and mechanically fixed.
  • the spring clip is preferably made of a metal wire or of a metallic sheet.
  • the carrier comprises two preferably substantially parallel bores which hold a bent spring clip.
  • the cranked part of the spring clip is located on the first side of the carrier, while the spring clip on the second side of the carrier, which is directed towards the grinding path or the slip ring module, forms at least one contact spring, preferably two contact springs.
  • the spring clip is electrically contacted on the first side.
  • it is soldered to the carrier with an electrical conductor, for example a conductor track.
  • an electrical contacting is now preferably carried out on the first side of the carrier by means of a contacting point, which is preferably a soldering point.
  • the contacting can also include a press-in. Forces generated by a slip path on the contact springs are introduced into the carrier via the bores starting from the second side of the carrier. Between the contact spring and the contacting point is located on the first side of the carrier further a crank for mechanical relief of the bonding solder joint.
  • the bend is here a resilient element.
  • the contacting and in particular Kunststoffleiterslötstelle could also be a through hole in a hole, unless through this hole a segment of the spring clip with a contact spring leads.
  • the bore has a diameter corresponding to the diameter of the spring clip.
  • the diameter of the bore should not be greater than twice the diameter, preferably 1.5 times and more preferably 1.2, or 1.1, 1.05 or 1.01 times the diameter .
  • the spring clip could also be pressed into the bore.
  • the bore preferably has a smaller diameter than the diameter of the spring clip.
  • the diameter of the bore is not more than 0.95 or 0.9 times and more preferably 0.8 times the diameter of the spring clip.
  • the via preferably has mechanically supporting properties and reinforces the bore. Although it serves to improve the electrical contact with the carrier, primarily the electrical contact is made by the mechanically non-loaded solder joint.
  • a recess with a cross section corresponding to the cross section of the flat material could be provided instead of a bore.
  • the spring clip has a center piece with two ends, in which a crank with subsequent contact spring is provided at each end.
  • crank with subsequent contact spring is provided only at one end of the middle piece.
  • cranks can be provided in succession instead of a cranking.
  • a bend can have different shapes. It could be semicircular or rectangular, or have a polygonal wire guide.
  • Particularly preferred here is an arrangement of the contact spring in V-shape, since this is particularly compact and has good transmission properties.
  • a U-shape can be produced, in which the contact springs protrude approximately perpendicularly from the holes of the carrier.
  • the spring clip is not soldered within the holes. Therefore, the holes are particularly preferably not metallized in the interior. It can also be achieved with spring clips that are soldered in the holes, good results.
  • the solder joint in the bore is not primarily necessary for the electrical contact, since the electrical contact is made via a mechanically decoupled by a bend contacting position. Thus, such a brush block would work well even if this solder joint in the hole.
  • the brushes are preferably metal wires and comprise at least one electrically conductive material.
  • you have a core of a mechanically stable and resilient material, such as steel, copper beryllium or brass and an outer coating or shell of a highly electrically conductive and preferably corrosion-resistant material, such as silver, gold or a gold alloy.
  • the brushes may also comprise wires of silver / or gold or alloys thereof.
  • a slip ring arrangement according to the invention has a slideway and at least one of the brush blocks disclosed herein.
  • the grinding path preferably has at least one V-groove.
  • sliding tracks with other geometries can be used. These may be, for example, flat sliding tracks or sliding tracks with U-shaped grooves (semicircular, elliptical).
  • a lateral bending of the contact spring for adjusting the correct angle or the correct shape such as a V-shape can be done.
  • the brush block has a carrier 21, preferably a printed circuit board.
  • the carrier 21 serves here for receiving contact springs 31, 32 as well as conductor tracks 60 for connecting the contact springs.
  • the contact springs are here in a V-shape from the carrier. This design can be at least two, but usually also arrange four brush blocks around a slip ring module, allowing for a higher contact count.
  • the conductor tracks have here connection bores 61, in or through which a connection wire can be inserted and soldered.
  • connection bores 61 in or through which a connection wire can be inserted and soldered.
  • connection resistance can be reduced, the reliability increased and the contact noise can be reduced.
  • the attachment of the brush block can be done via the fasteners 68 with holes 69
  • the first contact spring 31 and the second contact spring 32 are integrally formed from a spring clip.
  • the spring clip has a center piece 35, which is soldered to the carrier 21 in a contacting point. It is preferably soldered to a conductor 60 here.
  • the middle piece 35 goes on one side into a first crank 33 and from there into the first contact spring 31 via, and from the second side into a second crank 34 and from there into the second contact spring 32 via.
  • the middle piece 35 and the cranks 33, 34 lie on the first side 26 of the carrier.
  • the contact springs 31, 32 are performed by means of bores 24, 25 through the carrier 21 to the second side 27 out.
  • the bores of the carrier 21 can optionally be metallized inside or not metallized. Preferred for the invention is that the contact springs in the bore are not soldered to the circuit board. Therefore, it is further preferred if the holes are not metallized.
  • FIG. 3 again the brush block is shown in section.
  • the spring clip 30 with the middle piece 35, with its ends 37, 38, the cranks 34, 33 and the contact springs 31, 32 to see.
  • FIG. 4 a detail of a spring clip is shown.
  • the middle piece 35 of the spring clip 30 is by means of the contacting point 40 with the first side 26 of the Carrier 21 connected.
  • Another solder joint 41 may be mounted between the second crank 34 and the second contact spring 32 on the first side 26 of the carrier 21 for the mechanical relief of the contacting point 40 via the crank 34.
  • a press fit or a positive connection between them could exist.
  • first contact spring 51 and the second contact spring 52 are separate mechanical components. These are not connected by a central piece. Instead, a first end piece 55 is guided at one end of the crank 53 through a second bore 25 and a first contact spring 51 through a first bore 24.
  • the second contact spring is preferably designed symmetrically thereto.
  • a second end 56 at the other end of the crank 54 to the second contact spring 52 is fixed here by a bore in the carrier 21.
  • the contact springs shown here can be used individually or optionally arranged symmetrically.
  • the contact point 40 is located on the first side of the carrier 21 at the end of the second bore 25 or in a through hole of this bore.
  • FIG. 6 a further embodiment of the invention is shown. This is similar to the embodiment FIG. 3 , However, only one contact spring 32 is provided here.
  • FIG. 7 shows a complete slip ring with a brush block 20, the first contact spring 22 and the second contact spring 23 on a grinding path 11 on a Schleifbahnanii 12 a rotatable slip ring module 10th grind and thus be in electrical contact with this. There are still the directions of the forces 71, 72 located on the contact spring 22, 23.
  • the forces on the contact spring are again shown in detail.
  • the forces 71, 72 are perpendicular to the contact points of the contact springs on the grinding path. In this illustration, only the force 72 will be discussed, since the force 71 is symmetrical to the opposite contact spring to this.
  • the force 72 can be divided into a first component 73 parallel to the carrier and a second component 74 perpendicular to the carrier.
  • the component 73 parallel to the carrier is balanced by a second opposite component from the other contact spring.
  • the component 74 perpendicular to the carrier is already partially received at the bending point 36 of the contact spring directly at the beginning of the bore 25 in the carrier.
  • the crank 34 acts like a spring and prevents a still small proportion of the second vertical component 74 from overburdening the solder joint on the center piece. Furthermore, results from these forces at the entry point of the contact springs in the carrier 21, a bending moment 75, which can also be largely absorbed by the bore 25 in the carrier.

Claims (12)

  1. Bloc de balais pour une piste de frottement (11) comportant au moins un support (21) avec un premier côté tourné à l'opposé de la piste de frottement, un deuxième côté tourné vers la piste de frottement et au moins un étrier à ressort (30) fixé sur celui-ci avec au moins un ressort de contact (31, 32, 51), lequel étrier à ressort est connecté de façon conductrice électrique par au moins un point de contact (40) avec un conducteur électrique sur le support, le support (21) présentant deux trous percés (24, 25) pour retenir l'étrier à ressort (30) et l'étrier à ressort traversant les deux trous percés du premier côté au deuxième côté du support et se terminant sur le deuxième côté par au moins un ressort de contact (31, 32, 51), caractérisé en ce que l'étrier à ressort (30) présente sur le premier côté du support, entre l'au moins un point de contact (40) et l'au moins un ressort de contact (31, 32), au moins un élément élastique conformé comme un coude (33, 34) destiné à décharger le point de contact (40), lequel point de contact (40) comprend un point de brasure ou un contact inséré en force.
  2. Bloc de balais selon la revendication 1, caractérisé en ce que l'étrier à ressort (30) présente une pièce centrale (35) avec deux extrémités (37, 38), qui se termine à chaque extrémité par un coude (33, 34) suivi de ressorts de contact (31, 32), la pièce centrale étant reliée au support (21) par le point de contact (40).
  3. Bloc de balais selon la revendication 1, caractérisé en ce que l'étrier à ressort (30) présente une pièce centrale (35) avec deux extrémités (37, 38) dont chaque extrémité comporte un coude (33, 34), un seul coude se terminant par un ressort de contact (33) et le deuxième coude dépassant par une extrémité dans un trou percé, et la pièce centrale étant reliée au support (21) par le point de contact (40).
  4. Bloc de balais selon la revendication 1, caractérisé en ce que l'étrier à ressort (30) présente un coude (53) avec un ressort de contact (51) qui lui fait suite sur un côté et dépasse à travers le premier trou percé (24), et le deuxième côté du coude dépasse à travers le deuxième trou percé (25) et est relié en même temps au support (21) par un point de contact (40).
  5. Bloc de balais selon la revendication 4, caractérisé en ce que le deuxième trou percé (25) est métallisé à l'intérieur et rempli de brasure.
  6. Bloc de balais selon l'une des revendications précédentes, caractérisé en ce que le support (21) est réalisé comme une carte de circuits électriques.
  7. Bloc de balais selon l'une des revendications précédentes, caractérisé en ce qu'au moins un ressort de contact (31, 32) présente un noyau fait d'un matériau mécaniquement stable et élastique, par exemple de l'acier, un alliage de cuivre et de béryllium ou du laiton, et présente un revêtement extérieur ou une enveloppe faits d'un matériau bon conducteur électrique et de préférence résistant à la corrosion, par exemple de l'argent, de l'or ou un alliage d'or et d'argent.
  8. Bloc de balais selon l'une des revendications précédentes, caractérisé en ce qu'au moins un ressort de contact (31, 32) contient de l'argent, de l'or ou un alliage d'or et d'argent.
  9. Bloc de balais selon l'une des revendications précédentes, caractérisé en ce que l'au moins un point de contact (40) se trouve sur le premier côté du support.
  10. Bloc de balais selon l'une des revendications précédentes, caractérisé en ce qu'au moins un trou percé, à travers lequel passe un ressort de contact de l'étrier à ressort, présente sur l'intérieur une métallisation qui n'est pas brasée à l'étrier à ressort.
  11. Disposition de bague collectrice comprenant une piste de frottement (1) et au moins un bloc de balais selon l'une des revendications précédentes.
  12. Procédé pour la fabrication d'un bloc de balais selon l'une des revendications précédentes, comprenant les étapes suivantes :
    - préparation d'un support avec au moins deux trous percés,
    - insertion d'un étrier à ressort comportant au moins un coude,
    - création d'un point de brasure pour la mise en contact.
EP13711857.6A 2012-03-26 2013-03-12 Bloc de balais pour système de bague collectrice Not-in-force EP2831961B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012204830A DE102012204830A1 (de) 2012-03-26 2012-03-26 Bürstenblock für eine Schleifringanordnung
PCT/EP2013/055038 WO2013143842A1 (fr) 2012-03-26 2013-03-12 Bloc de balais pour système de bague collectrice

Publications (2)

Publication Number Publication Date
EP2831961A1 EP2831961A1 (fr) 2015-02-04
EP2831961B1 true EP2831961B1 (fr) 2016-11-16

Family

ID=47997386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13711857.6A Not-in-force EP2831961B1 (fr) 2012-03-26 2013-03-12 Bloc de balais pour système de bague collectrice

Country Status (5)

Country Link
US (1) US9281648B2 (fr)
EP (1) EP2831961B1 (fr)
CN (1) CN104380542B (fr)
DE (1) DE102012204830A1 (fr)
WO (1) WO2013143842A1 (fr)

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Publication number Publication date
WO2013143842A1 (fr) 2013-10-03
US9281648B2 (en) 2016-03-08
EP2831961A1 (fr) 2015-02-04
CN104380542A (zh) 2015-02-25
DE102012204830A1 (de) 2013-09-26
CN104380542B (zh) 2016-12-21
US20150024610A1 (en) 2015-01-22

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