EP2099102B1 - Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit - Google Patents

Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit Download PDF

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Publication number
EP2099102B1
EP2099102B1 EP09151585.8A EP09151585A EP2099102B1 EP 2099102 B1 EP2099102 B1 EP 2099102B1 EP 09151585 A EP09151585 A EP 09151585A EP 2099102 B1 EP2099102 B1 EP 2099102B1
Authority
EP
European Patent Office
Prior art keywords
recess
contact
contact piece
damper element
contact unit
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
Application number
EP09151585.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2099102A1 (de
Inventor
Klaus-Georg Tontsch
Reiner Pfeiffer
Wolfgang Sauer
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.)
Schunk Kohlenstofftechnik GmbH
Original Assignee
Schunk Kohlenstofftechnik 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 Schunk Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP2099102A1 publication Critical patent/EP2099102A1/de
Application granted granted Critical
Publication of EP2099102B1 publication Critical patent/EP2099102B1/de
Ceased 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
    • H01R39/36—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
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/12—Manufacture of brushes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines

Definitions

  • the invention relates to a method for producing a contact unit and a contact unit, in particular brush unit, with at least one contact piece, at least one connection conductor and at least one damper element with rubber-elastic properties, wherein a recess is formed in a surface of the contact piece to form the damper element and subsequently the recess is filled at least partially with an elastically hardenable potting compound.
  • a contact piece consists essentially of graphite with various admixtures as electrode material, wherein a connecting conductor is formed as a strand and is fixed in or on the contact piece for transmitting electrical energy.
  • the contact piece continues with a contact side on the commutator or slip ring of the electric motor, wherein by a rotation of the commutator or slip ring, the contact piece through Abrasion worn or used up. Also, the wear of the contact piece is significantly influenced by the so-called brush fire.
  • Brush fire may, among other things, result in evaporation of electrode material of the contact piece and further increase in wear roughening of a Kommutatorgleit Structure.
  • the unwanted brush fire can be caused for example by vibrations of the electric motor or non-circularity of the commutator or slip ring. Therefore, to dampen any vibrations of a contact piece and thus to avoid brush fire, contact pieces are regularly provided with damping elements.
  • the damper elements are glued to the contact piece of a contact unit, which was produced in an integrated manufacturing process, subsequently.
  • a contact unit takes place, starting from a contact piece blank or graphite molded article, in a manufacturing center, wherein first the contact piece blank are provided with bores for receiving a connecting conductor and optionally an interruption device or a sensor element. Subsequently, the connecting conductor is inserted into the bore and a gap between the connecting conductor and a bore wall is filled with a filling material, so-called stamping powder, wherein the stamping powder is solidified during a filling by means of a, surrounding the connecting conductor, a ramming exporting, tube. Finally, the stamping powder is sealed with a liquid covering compound, covering a bore opening between the connecting conductor and the contact piece.
  • the covering compound is applied in a metered manner with the aid of a delivery tube, forms a liquid meniscus between the connection conductor and a contact piece surface and finally cures.
  • the sticking of a damper element or a damping rubber and the damper element optionally additionally covering hard tissue support is now below the integrated production in a separate Production step.
  • the cost of the damper element or its application are relatively high in relation to the cost of producing a contact unit without damper element.
  • the DE 1 488 674 also discloses a contact piece with a damper element, wherein in the contact piece a longitudinal groove is formed with undercuts in which the matching trained damper element can be used and positively fastened.
  • the EP 0 723 318 A2 relates to a design of a breaker device or a spring-biased shut-off nipple and a sensor element or a message cord in a contact piece.
  • a contact piece with a damper element shows the DE 30 29 041 A1 wherein the damper element is made of silicone rubber and is arranged as a ring around an exit end of a strand from the contact piece.
  • the damper element also serves to support the strand.
  • This object is achieved by a method for producing a contact unit having the features of claim 1 and by a contact unit having the features of claim 18.
  • a contact unit having the features of claim 1 in particular brush unit, with at least one contact piece, at least one connection conductor and at least one damper element is formed to form the damper element a recess in a surface of the contact piece, and subsequently the recess with a elastically solidified potting compound at least partially filled.
  • the potting compound is substantially solidified after filling the recess and forms a damper element with rubber-elastic properties.
  • the inventive method allows the integration of the formation of the damper element in the conventional method for producing a contact unit, without the need for a further separate handling of the contact unit or a prefabricated damper element would be connected, which must be applied to the contact unit. Rather, the damper element is formed in connection with the production of the contact unit; represents an intermediate to the process immanentes.
  • the aforementioned method steps allow the formation of a damper element in the context of an integrated manufacturing process for a contact unit, whereby the costs for the production of the contact unit with the damper element compared to the methods known from the prior art can be significantly reduced.
  • a second, complementary recess can be filled with a potting compound, wherein the potting compound is substantially solidified after filling and so can form a damper element with rubber-elastic properties. If the introduction of the potting compound into the second recess occurs at the same time or immediately following the application of the covering compound to the filling material, the formation of the damping element in one working step or in a working position within an integrated manufacturing center is possible.
  • the recesses are formed in one step.
  • the recesses may be formed simultaneously or immediately thereafter by a material-removing manufacturing process, such as drilling, milling, grinding, etc., within a work step or in a machining arrangement of the machining center.
  • At least one further recess is formed in the contact piece.
  • the formation of the further recess can be easily integrated in the manufacturing process, wherein the further recess can serve to receive a supplementary sensor element, connecting conductor or other devices and elements in the contact piece.
  • an interruption device can be used in a recess before the introduction of the potting compound.
  • a breaker may disconnect the contactor from a commutator or slip ring prior to achieving critical contact patch wear, thereby avoiding damage to the commutator or slip ring by the contactor unit. If a sufficient depth in the contact piece is provided for the recess of the interruption device, potting compound for forming a damper element can be introduced in a recess region remaining over the interruption device without a separate recess having to be formed for the formation of the damper element.
  • two muffler elements can be formed simultaneously. This can be useful, in particular, when the contact unit is arranged relative to a pressure element which exerts a pressure force for contacting the contact unit to a commutator or slip ring on two contact points of a contact side of the contact piece.
  • a further recess can be formed in the contact piece, in which a sensor element is arranged.
  • the contact unit can be easily equipped with an additional sensor element, for example, to detect contact piece wear as part of the ongoing manufacturing process.
  • a further recess can be formed in the contact piece, in which a further connection conductor is arranged.
  • the contact unit then has at least two connection conductors, which ensure a particularly secure contacting of the contact piece.
  • At least one recess is formed as a bore.
  • a bore diameter can be particularly easily adapted to a diameter of a connection conductor, an interruption device or a sensor element.
  • a hole is particularly inexpensive and easy to produce.
  • potting compound for forming one or more damper elements can be introduced in the annulus or in circular ring sections.
  • a central annulus diameter adapted spiral spring can be used as a pressure element in the annular recess in the contact piece, the coil spring is advantageously positioned positively on the contact element.
  • At least one recess can be formed as a slot.
  • a slot can be particularly easily formed by means of a saw blade, shank or side milling cutter in the contact piece. Also can be used with a slot much of a surface of the contact side of the contact unit to form a damper element with a relatively large surface area.
  • the recess is formed with a circular segment-shaped cross-section.
  • the recess can then be formed along a longitudinal axis of the contact side of the contact piece or in the direction of a transverse axis, wherein on a bottom surface of the recess, the potting compound partially is applied.
  • the potting compound With appropriate viscosity and cohesion of the potting compound a lateral leakage of the potting compound from the recess can be prevented beyond, the potting compound can then be solidified as a drop to a damper element.
  • the circular segment-shaped cross-section of the recess allow a particularly secure receiving a pressure element such as a pressure finger.
  • the contact unit can be formed with a particularly high time saving and with little additional effort of a production center.
  • a quantity potting compound can be introduced into the recess, such that an abutment side of the contact piece is surmounted by the potting compound.
  • the then formed by solidification damper then also dominates the plant side.
  • a contact pairing between damper element and a pressure element can then be made particularly simple.
  • the contact unit can additionally be equipped with a support element without the need for a separate work step, such as, for example, bonding of the support element.
  • the support element can substantially cover the contact piece at least partially, wherein a gap remains between the support element and the contact piece is at least partially filled by the potting compound or the damper element.
  • the method can be used as covering compound potting compound.
  • the covering compound fulfills the function of the covering compound.
  • silicone can be used as potting compound. Silicone can be provided inexpensively in the required viscosity and quantity. Further, a solidification of the silicone can be done independently, but the silicone can still remain sufficiently elastic to act as a damper element.
  • the contact unit according to the invention with the features of claim 18, in particular brush unit, has at least one contact piece with at least one connection conductor and at least one damper element, wherein a recess in a surface of the contact piece is formed to form the damper element, and the recess with an elastically solidified potting compound at least partially filled.
  • a trained contact unit allows a particularly simple and inexpensive production thereof, since the damper element does not need to be glued separately.
  • At least two recesses may be formed in the contact piece, in which case the connection conductor may be arranged in a first recess, the first recess may be filled with filling material, a covering compound may be applied to the filling material, and wherein second recess potting compound may be introduced and solidified to form the damper element.
  • the connection conductor may be arranged in a first recess
  • the first recess may be filled with filling material
  • a covering compound may be applied to the filling material
  • second recess potting compound may be introduced and solidified to form the damper element.
  • the first and the second recess may be arranged on a common center axis. Both recesses can then be easily manufactured in one operation, since the positions of the recesses on the contact piece do not differ significantly from each other.
  • first and the second recess may be arranged concentrically. Both recesses can then be introduced into the contact piece in a single working movement with, for example, a drill or milling cutter in the form of a countersink. A first lower recess with a relative to a second upper recess smaller diameter can then serve to receive a connecting conductor, wherein after attachment of the connecting conductor, the second upper recess can be filled with potting compound. A surrounding the connection conductor damper element can be particularly easily formed.
  • the first recess may be arranged on a side surface and the second recess on a contact side of the contact piece.
  • the connection conductor can be arranged on the side surface of the contact piece, in which case the second recess on the contact side of the contact piece can serve to form or arrange the damping element. The contact side of the contact piece is then not broken by a contact pair with a pressure element possibly interfering conductors.
  • the contact unit has a plurality of contact pieces.
  • the contact unit can then be formed by means of mutually bonded to side surfaces contact pieces.
  • multi-part contact units can be formed with the known from the prior art advantageous effects of such contact units.
  • Fig. 1 shows a known from the prior art contact unit 10, which is formed from a contact piece 11, a connecting conductor 12 and a damper element
  • a strand end 14 of the connection conductor 12 is inserted in a recess 15 formed in the contact piece 11 as a bore, wherein an annular gap 16 between the strand end 14 and a bore wall 17 is filled with priming powder 18.
  • the stamping powder 18 was compressed during backfilling, such that the stranded end 14 is now firmly connected to the contact piece 11.
  • a covering compound 20 is applied to a side surface 21 of the contact piece 11, the recoating powder 18 and the bore opening 19 overlapping.
  • the covering compound 20 Since the covering compound 20 was first applied in the liquid state, the covering compound 20 is formed with a meniscus-shaped surface 22 between the side surface 21 and the strand end 14. After applying the covering compound 20 was an independent solidification of the same.
  • the damper element 13 On a contact side 23 of the contact piece 11, the damper element 13 is fixed by means of an adhesive layer 24.
  • a pressure element not shown here such as a spring or a spring-actuated pressure finger of a brush holder, can exert a compressive force on the damper element 13 made of a rubber-like material.
  • the contact piece 11 is then pressed in the direction of the fine image with a contact side 25 on a running surface, not shown here, of a commutator or slip ring for transmitting electrical energy.
  • a contact piece 27 is here provided with bores 28, 29 and 30 formed recesses, wherein in the bore 28, a sensor element 31 with a sensor conductor 32, in the bore 29, a connection conductor 33 and in the bore 30, an interruption device 34 is arranged.
  • An abutment side 35 of the contact piece 27 covering a damper element 36, the sensor conductor 32 and the connection conductor 33 surrounding, secured by means of an adhesive layer 37 on the plant side 35.
  • the sensor element 31 is used to detect a state of wear of the contact piece 27, wherein upon contact of an end insulation 38 of the sensor element 31 with, for example, a commutator reaching the respective state of wear is signaled.
  • the interruption device 34 has a shut-off pin 39, a helical compression spring 40 and a partition plate 41.
  • the helical compression spring 40 pushes the Abschaltx 39 out of the bore 30 and thus lifts the contact piece 27 of, for example, a commutator, which causes a shutdown of the corresponding device, and thus a Damage to the commutator is prevented by excessive wear of the contact piece 27.
  • the bore 30 is filled in a region between the partition plate 41 and the adhesive layer 37 with 35 Einstampfpulver. Depending on the design of a contact unit, this filling can also be dispensed with.
  • a contact unit shown corresponds to the formation of the respective connection conductors, sensor elements or interruption devices substantially in the Fig. 1 and 2 described embodiments thereof.
  • the 3 and 4 show a contact unit 44 with a connecting conductor 45 which is inserted in a recess formed as a bore 46 and secured by means of stamping powder 47 and covering compound 48 therein.
  • a second formed as a bore 49 recess is filled with a damping element 50 forming a potting compound.
  • the damper element 50 in this case surrounds the connection conductor 45, as a result of which additional fixing of the connection conductor to the contact piece 51 is achieved.
  • a compression spring not shown here, for exerting a compressive force on the contact unit 44 can be brought to bear against the damper element 50, the connection conductor 45.
  • a contact unit 52 in a contact piece 53 has three holes 54, 55 and 56, wherein in the bore 55 a connection conductor 57 and in the bore 56 an interruption device 58 is inserted.
  • the bore 54 and a hole section 59 of the bore 56 remaining above the interrupting device 58 are each provided with damping elements 60 and 61, respectively, formed from potting compound introduced into the bores 54 and 56. Due to a cohesion of the potting compound, the damper elements 60 and 61 project beyond an abutment side 62 of the contact piece 53. The damper elements 60 and 61 can thus be brought into contact with a pressure element, not shown here.
  • FIGS. 7 and 8 show a contact unit 63 in which in a contact piece 64 two holes 65 and 66 are formed.
  • a connection conductor 67 is inserted and in the bore 66, a damper element 68 is introduced by introducing and solidifying potting compound.
  • the damper element 68 projects beyond an abutment side 69 of the contact piece 64 and is arranged essentially in the centroid of the abutment side 69.
  • FIGS. 9 and 10 show a contact unit 70 with a contact piece 71, wherein in the contact piece 71 an annular recess 72 is formed.
  • a connection conductor 73 is formed in a hole 74 as a Recess attached.
  • the recess 72 is arranged rotationally symmetrical to the bore 74 and thus forms a pin 75 of the contact piece 71.
  • segments 76 and 77 of the recess 72 each have a damper element 78 and 79 formed by introducing and solidification of potting compound.
  • a compression spring not shown here can be used so surrounding the pin 75 in the recess 72 and held in this, wherein a damping by means of the damper elements 78 and 79, respectively.
  • FIGS. 11 and 12 show a contact unit 80 with a contact piece 81 in which a recess as a bore 82 and two further recesses 83 and 84 are formed with a circular segment-shaped cross-section.
  • a recess as a bore 82 and two further recesses 83 and 84 are formed with a circular segment-shaped cross-section.
  • the recesses 83 and 84 respectively drop-shaped damper elements 85 and 86 are arranged, wherein a corresponding viscosity of the damping elements 85 and 86 forming potting compound prevents flow of the potting compound from the recesses 83 and 84 before solidification.
  • the illustrated arrangement of the damper elements 85 and 86 is particularly suitable for the use of, for example, pressure fingers as a pressure element.
  • FIGS. 13 and 14 show a simplified representation of a contact unit 87 with a contact piece 88 and a damper element 89.
  • Possible arrangement positions 90 and 91 of a connecting conductor, not shown here are indicated by dashed lines corresponding to a Anschlußleitermitittenachse.
  • the formation of a recess for the connection conductor is also not shown.
  • a recess is formed here as a slot 92 with a circular segment-shaped cross-section in the contact piece. The slot 92 is completely filled by the damper element 89.
  • a contact unit 93 is shown with a contact piece 94, wherein formed in the longitudinal direction of an abutment side 95 a recess 96 with a circular segment-shaped cross-section is.
  • a drop-shaped damper element 97 is formed of solidified potting compound.
  • FIGS. 17 and 18 show a contact unit 98 with a contact piece 99, wherein in a contact side 100 of the contact piece 99, a slot-shaped recess 101 is formed with a molded therein damper element 102.
  • the recess 101 may be formed, for example, with an end mill, wherein the contact piece 99, a peripheral wall 103, the recess 101 for receiving potting bounded.
  • the damper element 102 can thus form a surface 104 which projects beyond the contact side 100.
  • FIGS. 19 and 20 show a contact unit 105 with a contact piece 106, damper elements 107 and 108 in recesses 109 and 110 and an applied to the recesses 109 and 110 support member 111.
  • the recesses 109 and 110 were filled with a quantity of potting compound, each one contact side 112 of the contact piece 106 towering over.
  • the support element 101 has been positioned on the potting compound that has not yet completely solidified, such that a damping gap 113 remains between the contact side 112 of the contact piece 106 and the support element 111 upon solidification of the potting compound.
  • the support element 111 further has a through hole 114 through which a connection conductor 115 is guided.
  • the Fig. 21 shows a contact unit 116 in which in a contact piece 117 holes 118, 119 and 120 for receiving a sensor element 121, a strand end 122 and an interruption device 123 are formed. Surrounding a connection conductor 124, a recess 125 for receiving a damper element 126 is formed.
  • a contact unit 127 with a contact piece 128 is in Fig. 22 shown.
  • a respective stranded end 131 and 132 and in a bore 133 a breaker 134 is received in bores 129 and 130.
  • a recess 135th formed to receive a damper element 136.
  • the damper element 136 closes the bore 133 in such a way that the interruption device 134 is securely fastened in the bore 133 and the use of recoil powder can be dispensed with.
  • Fig. 23 shows a contact unit 137 in which in a contact piece 138 holes 139, 140 and 141 are formed, and in each of which a sensor element 142, an interruption device 143 and a stranded end 144 is arranged. Above the holes 139, 140 and 141, a circular segment-shaped recess 145 is formed, wherein in the recess 145, a damper element 146 is arranged, which surrounds a sensor conductor 147 of the sensor element 142 and a connecting conductor 148 and closes the bore 140 of the interrupting device 143 covering.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Contacts (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP09151585.8A 2008-03-06 2009-01-29 Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit Ceased EP2099102B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008012963A DE102008012963A1 (de) 2008-03-06 2008-03-06 Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit

Publications (2)

Publication Number Publication Date
EP2099102A1 EP2099102A1 (de) 2009-09-09
EP2099102B1 true EP2099102B1 (de) 2017-06-14

Family

ID=40566339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09151585.8A Ceased EP2099102B1 (de) 2008-03-06 2009-01-29 Verfahren zur Herstellung einer Kontakteinheit und Kontakteinheit

Country Status (4)

Country Link
EP (1) EP2099102B1 (hu)
CN (1) CN101533985B (hu)
DE (1) DE102008012963A1 (hu)
HU (1) HUE034201T2 (hu)

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DE102011089373B4 (de) * 2011-12-21 2013-09-05 Robert Bosch Gmbh Bürstenhalteanordnung für eine Kohlebürste
DE102012209222A1 (de) 2012-05-31 2013-12-05 Schunk Kohlenstofftechnik Gmbh Kohlebürste mit Zentrierhülse
DE102012209216A1 (de) * 2012-05-31 2013-12-05 Schunk Wien Gesellschaft M.B.H. Kohlebürste mit isolierendem Stampfpulver
CN102904146A (zh) * 2012-10-26 2013-01-30 海门市通达碳业有限公司 一种电刷组件的装配方法
CN103811972A (zh) * 2012-11-12 2014-05-21 钱俊勇 一种耐腐蚀电刷的组装工艺
CN105958299A (zh) * 2016-05-31 2016-09-21 神奇电碳集团上海实业有限公司 电刷导线线头收紧方法
CN111934131A (zh) * 2020-07-15 2020-11-13 长园电力技术有限公司 一种防水端子及其制作方法

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US2866112A (en) * 1955-11-17 1958-12-23 Union Carbide Corp Brush cap connection
FR1436586A (fr) * 1964-12-24 1966-04-29 Lorraine Carbone Perfectionnement aux balais pour machines électriques
FR2102627A5 (hu) * 1970-08-12 1972-04-07 Lorraine Carbone
DE2322713A1 (de) * 1973-05-05 1974-11-21 Carbone Ag Verbindung eines anschlussleiters mit einer kohlebuerste und vorrichtung zur herstellung einer derartigen verbindung
DE2536018A1 (de) * 1975-08-13 1977-03-03 Bosch Gmbh Robert Buerstenhalter
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DE3029041A1 (de) * 1980-07-31 1982-02-18 Deutsche Carbone Ag, 6000 Frankfurt Verfahren zur herstellung einer kohlebuerste mit anschlussleiterkabel mit schwingungsfester kabelbefestigung und nach diesem verfahren hergestellte kohlebuerste
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JP3519706B2 (ja) * 2001-07-18 2004-04-19 東京パーツ工業株式会社 ブラシ制振装置とこのブラシ制振装置の製造方法及びこのブラシ制振装置を備えた扁平型振動モータ
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DE102005063170B4 (de) * 2005-12-30 2011-12-08 Schunk Kohlenstofftechnik Gmbh Verfahren zum Bestücken einer Kohlebürste mit Abschalteinrichtung

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Publication number Publication date
CN101533985A (zh) 2009-09-16
DE102008012963A1 (de) 2009-09-17
EP2099102A1 (de) 2009-09-09
CN101533985B (zh) 2015-03-25
HUE034201T2 (hu) 2018-02-28

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