EP0723318A2 - Balai en charbon - Google Patents

Balai en charbon Download PDF

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Publication number
EP0723318A2
EP0723318A2 EP96104231A EP96104231A EP0723318A2 EP 0723318 A2 EP0723318 A2 EP 0723318A2 EP 96104231 A EP96104231 A EP 96104231A EP 96104231 A EP96104231 A EP 96104231A EP 0723318 A2 EP0723318 A2 EP 0723318A2
Authority
EP
European Patent Office
Prior art keywords
carbon brush
recess
wire
sleeve
bore
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.)
Granted
Application number
EP96104231A
Other languages
German (de)
English (en)
Other versions
EP0723318A3 (fr
EP0723318B1 (fr
Inventor
Erfindernennung liegt noch nicht vor Die
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
Priority claimed from DE9211524U external-priority patent/DE9211524U1/de
Application filed by Schunk Kohlenstofftechnik GmbH filed Critical Schunk Kohlenstofftechnik GmbH
Publication of EP0723318A2 publication Critical patent/EP0723318A2/fr
Publication of EP0723318A3 publication Critical patent/EP0723318A3/fr
Application granted granted Critical
Publication of EP0723318B1 publication Critical patent/EP0723318B1/fr
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
    • H01R39/02—Details for dynamo electric machines
    • H01R39/58—Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear
    • 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 invention relates to a carbon brush with a cuboid or cylindrical geometry with side or end faces, wherein an end face can be placed on a commutator or slip ring of an electric motor, comprising current-conducting wire arranged in the carbon brush, optionally a shut-off nipple made of insulating material and spring-loaded in the longitudinal axis of the carbon brush and a signaling wire which is arranged and fixed in position with a section of a first recess, preferably running in the longitudinal direction of the carbon brush, such as a bore, in order to generate a signal for indicating a specific consumption of carbon brushes by interacting with the commutator or slip ring.
  • Signaling strands can be covered at least in some areas with Teflon or an equivalent material, at least in the section running within the carbon brush.
  • the section is then glued into the recess. So that the signal wire cannot slip out of the adhesive material - Teflon does not accept an adhesive - on the one hand, a wavy or twisted geometry is impressed on the section surrounded by Teflon, and on the other hand the section is laid in a loop or U-shape in the recess. The installation of corresponding signal wires is clearly complex.
  • FR-A 2 223 858 it is known to arrange a signaling wire surrounded by an insulating sheath in a sleeve made of insulating material, which extends at least in regions within a correspondingly adapted recess of the carbon brush without end-position fixing.
  • optical conductors are used to detect carbon brush wear, via which light signals are transmitted or received.
  • a carbon brush for collector motors is known from DE 28 04 547 A1, in which a signaling wire surrounded by an insulating jacket is arranged in a longitudinal bore.
  • a prefabricated plastic sleeve is proposed according to G 84 33 023 U1, which can be inserted into a bore in a carbon brush.
  • the signal wire is then inserted into the plastic part itself. So that the signaling wire remains in the sleeve, it is slotted so that when inserted into the carbon brush, the signaling wire is clamped between the longitudinal halves of the sleeve which can be moved relative to one another. If the bore for receiving the sleeve is too large compared to its outer diameter, a secure holding of the signal wire is not guaranteed.
  • the sleeve can also melt at high temperatures, resulting in an uncontrolled displacement of the signaling wire.
  • the present invention has for its object to develop a carbon brush of the type described in such a way that the carbon brush can be fitted with the signaling wire in a manner which is suitable for automatic and problem-free operation, and in addition a simple and secure position fixing of the signaling wire should be ensured. It should also be ensured that the position fixing of the signaling wire does not cause any tensions in the carbon brush, which can lead to inadmissible cracks, particularly in the case of laminated carbon brushes.
  • the signal wire is fixed in position via a second recess extending from a side surface.
  • the signaling wire is preferably tamped via the second recess starting from the side surface, such as a bore in the first recess.
  • the longitudinal bore can be adapted to the cross-section of the signal wire, so that a sufficient residual wall thickness remains.
  • the bore emanating from the side surface can have a relatively large cross-section in order to introduce and compact the powder for pounding the signaling wire through it.
  • the cross section of the second recess that is to say that which should be perpendicular or approximately perpendicular to the longitudinal axis of the carbon brush, is preferably approximately 1.5 times the cross section of the first recess, which, as mentioned, is adapted approximately to that of the signaling wire.
  • the second recess should run at a distance L / 3 to L / 2 from the free end of the section of the signal wire running inside the carbon brush, the length of which corresponds within the carbon brush L.
  • a carbon brush in which the signal wire is partially surrounded by a sleeve which extends within the first recess is characterized in that a pin element is arranged in the second recess, which preferably runs perpendicular to the longitudinal axis of the carbon brush, which is preferably above an edge of the sleeve and this touching.
  • the sleeve is rammed into the first recess via the second recess, which runs preferably perpendicular to the longitudinal axis of the carbon brush.
  • the signal wire Since the signal wire is cut to length before it is inserted into the carbon brush, it must be ensured that the free end is stripped. For this purpose, it can be provided that the signal wire, after it has been cut to length and optionally pretreated, is immersed in an etchant in an adhesive, preferably made of polyurethane.
  • shut-off nipple (14) is made of insulating material and is spring-biased in the direction of the longitudinal axis (16) of the carbon brush (10), preferably by means of a helical spring (18).
  • Both the stranded wire (12) and the shut-off nipple (14) are stamped in by means of powdered-in metal powder (20) or (22).
  • An insulating plate can also be inserted between the ramming powder (22) covering the shut-off nipple (14) and the end face facing it (24) can be arranged on which the coil spring (18) is supported.
  • a section (26) of a signaling wire (28) also runs within the carbon brush (10).
  • a signal is to be triggered via the signaling wire (28), namely when the carbon brush (10) interacting with a commutator or slip ring (not shown) is worn to such an extent that renewal is appropriate, i.e. before the carbon brush (10) in one Extent is used that the shut-off nipple (14) lifts the carbon brush from the slip ring or the commutator.
  • the section (26) of the signaling wire (28) extending in the bore (30) extends in the longitudinal direction of the bore (30).
  • the section (26) of the signaling wire (28) is surrounded in regions by a sleeve (32) which has a flange-like upper edge (34) which, when the signaling wire (28) is mounted, on a shoulder (36) of the stepped bore (30) is present.
  • the section (26) protrudes over the sleeve (32) so that the free end (38) of the section (26) extends in a space (44) which is between the bottom (42) of the bore (30) and the lower edge of the sleeve (32). Since the free end (38) of the signaling wire (28) is stripped, insulation can optionally be carried out with an adhesive material, in order not to generate a signal prematurely, which could otherwise be caused by carbon dust generated when the carbon brush runs off.
  • the flange-like edge or collar (34) is set back with respect to the free surface (46) of the side of the carbon brush (10) from which the stepped bore (30) originates.
  • the sleeve In order to clearly position the sleeve (32) and thus the signaling wire (28), the sleeve can be fixed in position in the carbon brush using adhesive material or a pin. This will be explained with reference to FIGS. 2 to 5.
  • a layered carbon brush (60) is shown, which consists of layers (62) and (64) glued together.
  • the stepped bore (30) for the signaling wire (28), not shown, and on the other hand an oblique bore (68) for a current-carrying wire extend from the end face (66) of the carbon brush (60).
  • the sleeve (32) with the signaling wire (not shown) is introduced into the bore (30), the edge (34) of the sleeve (32) resting on the shoulder (36) of the stepped bore (30).
  • This paragraph (36) can be caused by any change in cross section.
  • a recess such as a bore (74) extends perpendicular to the longitudinal axis (16) of the carbon brush (60) from a side surface (72) of the layer (64) of the carbon brush (60), into which a pen can be inserted.
  • the bore (74) or the pin is dimensionally designed so that the pin (76) touches the peripheral surface of the edge (34).
  • the position of the sleeve (32) in the bore (30) of the carbon brush (70) according to FIG. 5 is achieved by adhesive material which is metered into the space (78) that is located between the surface (80) of the carbon brush (70). and the upper free surface of the collar (34) of the sleeve (32) extends.
  • the position of the sleeve (32) can also be fixed in that the pin (76) does not run above the collar (34), but extends laterally along the sleeve and touches it tangentially in order to achieve a position fix .
  • fixing the sleeve in position by means of a recess running from one side surface and preferably perpendicular to the longitudinal axis of the sleeve, in that e.g. Carbon material is stamped.
  • a position fixation by e.g. a fastener such as screw were made.
  • FIG. 6 shows a cross section of a carbon brush (100) which has a cuboid geometry.
  • Bores (114) and (116) are provided parallel to the longitudinal axis (112) of the carbon brush.
  • a shut-off nipple (118) is arranged in the bore (114).
  • the shut-off nipple (118) is made of an insulating material and is preferably biased in the direction of the longitudinal axis (112) of the carbon brush with a helical spring (not shown).
  • a current-conducting strand (120) runs coaxially with the shut-off nipple (118) and above it.
  • a signaling wire (122) is arranged in the longitudinal bore (116) and extends with a section (124) of length L within the bore (116).
  • the cross section of the bore (116) corresponds approximately to that of the signaling wire (122).
  • the signal wire (122) is insulated within the bore (116).
  • the signaling wire (122) or its section (124) in the bore (116) is preferably covered with Teflon.
  • the end of the signal wire (122) has been pretreated with an etchant, so that it can then be immersed in an adhesive, preferably made of polyurethane.
  • an adhesive preferably made of polyurethane.
  • the free end (126) of the signaling wire (122) surrounded by the adhesive runs below the shut-off nipple (118). Consequently, when the carbon brush (110) wears, the end (126) first comes into an electrically conductive connection with a commutator or slip ring (not shown) before the carbon brush (110) is lifted off the commutator or slip ring via the shut-off nipple (118).
  • the current-carrying connection between the signal wire and the commutator or the slip ring triggers a signal which indicates that the carbon brush (110) has to be replaced.
  • a transverse bore (130) extends from a side surface (128) of the longitudinal bore (116), which is preferably perpendicular to the longitudinal axis (112) of the carbon brush (110) runs.
  • a transverse bore (130) is made of copper or iron powder or carbon introduced to tamp the signaling wire (122) or section (124), so that it immovably fix in the longitudinal bore (116).
  • the cross section of the transverse bore (130) can be considerably larger than that of the signaling wire (122) in order to introduce and compact the powder required for pounding to the required extent.
  • a screw or another fastening element can also be introduced into the transverse bore (130), by means of which the position is fixed of section (124) and thus the signaling wire (122).
  • the cross section of the transverse bore (130) preferably corresponds to 1.5 times the signaling wire (122).
  • the transverse bore (130) should also run approximately at a distance from the L / 3 to L / 2 to the free end (126) of the section (124) of the signaling wire (122).

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Dc Machiner (AREA)
EP96104231A 1992-09-02 1993-07-22 Balai en charbon Expired - Lifetime EP0723318B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9211524U 1992-09-02
DE9211524U DE9211524U1 (de) 1992-01-23 1992-09-02 Kohlebürste
EP93111727A EP0585591B1 (fr) 1992-09-02 1993-07-22 Balai en charbon

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP93111727A Division EP0585591B1 (fr) 1992-09-02 1993-07-22 Balai en charbon
EP93111727.9 Division 1993-07-22

Publications (3)

Publication Number Publication Date
EP0723318A2 true EP0723318A2 (fr) 1996-07-24
EP0723318A3 EP0723318A3 (fr) 1996-11-13
EP0723318B1 EP0723318B1 (fr) 1999-10-06

Family

ID=6883115

Family Applications (2)

Application Number Title Priority Date Filing Date
EP96104231A Expired - Lifetime EP0723318B1 (fr) 1992-09-02 1993-07-22 Balai en charbon
EP93111727A Expired - Lifetime EP0585591B1 (fr) 1992-09-02 1993-07-22 Balai en charbon

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP93111727A Expired - Lifetime EP0585591B1 (fr) 1992-09-02 1993-07-22 Balai en charbon

Country Status (3)

Country Link
EP (2) EP0723318B1 (fr)
AT (2) ATE149750T1 (fr)
DE (2) DE59309829D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2099102A1 (fr) * 2008-03-06 2009-09-09 Schunk Kohlenstofftechnik GmbH Procédé de fabrication d'une unité de contact et unité de contact
RU2375796C2 (ru) * 2005-12-30 2009-12-10 Шунк Коленштоффтехник Гмбх Угольная щетка с отключающим устройством
WO2013178791A1 (fr) 2012-05-31 2013-12-05 Schunk Wien Gesellschaft M.B.H. Balai de charbon doté de poudre isolante compactée
JP2015524243A (ja) * 2012-05-31 2015-08-20 シュンク・コーレンストッフテヒニーク・ゲーエムベーハー センタリングスリーブ付きカーボンブラシ

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103427268A (zh) * 2012-05-15 2013-12-04 海门市华联电碳有限公司 电镐用安全碳刷
CN103427271A (zh) * 2012-05-16 2013-12-04 海门市华联电碳有限公司 电磨机用多孔碳刷
CN103427279A (zh) * 2012-05-18 2013-12-04 海门市华联电碳有限公司 电磨机用自跳碳刷
CN119267550B (zh) * 2024-09-30 2025-11-21 长城汽车股份有限公司 换向器清洁方法、装置、存储介质及车辆

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2094469A5 (fr) * 1970-06-23 1972-02-04 Lorraine Carbone
DE2461374A1 (de) * 1974-12-24 1976-07-08 Rheinische Kohlebuerstenfabrik Kohlebuerste mit abschaltvorrichtung
JPS589549A (ja) * 1981-07-03 1983-01-19 Toshiba Corp 軸接地装置
DE4034030A1 (de) * 1990-10-26 1992-04-30 Schunk Kohlenstofftechnik Gmbh Kohlebuerste
DE4111206A1 (de) * 1991-04-06 1992-10-08 Schunk Kohlenstofftechnik Gmbh Kohlebuerste

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2375796C2 (ru) * 2005-12-30 2009-12-10 Шунк Коленштоффтехник Гмбх Угольная щетка с отключающим устройством
EP2099102A1 (fr) * 2008-03-06 2009-09-09 Schunk Kohlenstofftechnik GmbH Procédé de fabrication d'une unité de contact et unité de contact
WO2013178791A1 (fr) 2012-05-31 2013-12-05 Schunk Wien Gesellschaft M.B.H. Balai de charbon doté de poudre isolante compactée
DE102012209216A1 (de) 2012-05-31 2013-12-05 Schunk Wien Gesellschaft M.B.H. Kohlebürste mit isolierendem Stampfpulver
JP2015524243A (ja) * 2012-05-31 2015-08-20 シュンク・コーレンストッフテヒニーク・ゲーエムベーハー センタリングスリーブ付きカーボンブラシ

Also Published As

Publication number Publication date
ATE149750T1 (de) 1997-03-15
DE59305574D1 (de) 1997-04-10
DE59309829D1 (de) 1999-11-11
EP0585591B1 (fr) 1997-03-05
EP0723318A3 (fr) 1996-11-13
ATE185455T1 (de) 1999-10-15
EP0723318B1 (fr) 1999-10-06
EP0585591A1 (fr) 1994-03-09

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