EP0585591A1 - Balai en charbon - Google Patents

Balai en charbon Download PDF

Info

Publication number
EP0585591A1
EP0585591A1 EP93111727A EP93111727A EP0585591A1 EP 0585591 A1 EP0585591 A1 EP 0585591A1 EP 93111727 A EP93111727 A EP 93111727A EP 93111727 A EP93111727 A EP 93111727A EP 0585591 A1 EP0585591 A1 EP 0585591A1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
recess
sleeve
wire
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
EP93111727A
Other languages
German (de)
English (en)
Other versions
EP0585591B1 (fr
Inventor
Horst Ulm
Anton Swoboda
Günter Schardt
Edmund Kübler
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
Priority to EP96104231A priority Critical patent/EP0723318B1/fr
Publication of EP0585591A1 publication Critical patent/EP0585591A1/fr
Application granted granted Critical
Publication of EP0585591B1 publication Critical patent/EP0585591B1/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 signaling wire and preferably with a current-carrying wire arranged in the carbon brush and optionally with an isolating nipple made of insulating material and spring-loaded in the longitudinal axis of the carbon brush, the signaling wire, which is at least partially surrounded by a sleeve, with a for indicating a specific consumption of carbon brushes
  • Carbon brush interacting commutator or slip ring for releasing a signal in electrically conductive contact is arranged in a preferably extending in the longitudinal axis direction of the carbon brush and starting from a first carbon brush surface recess such as bore.
  • 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 embossed 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 in a sleeve made of insulating material, which extends at least in regions within a correspondingly adapted recess in the carbon brush. Since the signal wire itself is surrounded by an insulating jacket, problems can arise when it is clearly arranged in the sleeve.
  • 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 the signaling wire is clamped between the longitudinal halves of the sleeve which can be moved relative to one another when it is introduced into the carbon brush. 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 is based on the object of developing a carbon brush of the type described in the introduction in such a way that the carbon brush can be fitted with the signaling wire in a manner suitable for automatic and problem-free operation, and in addition a clear, secure positional fixation, in particular with respect to the area of the signaling wire section, which is to take place with the Commutator or the slip ring for releasing the signal interacts. It should also be ensured that the position fixing of the signaling wire does not cause any stresses in the carbon brush, which can lead to inadmissible cracks, particularly in the case of laminated carbon brushes.
  • the object is achieved in a carbon brush of the type described in the introduction in that the sleeve has an edge which extends at least in some areas and which lies against a shoulder of the recess, in that the sleeve with its outer edge surface spaced from the assigned first outer surface of the carbon brush and that adhesive material is introduced into the space formed between the outer surface of the sleeve edge and the first carbon brush surface and / or the signaling wire is fixed in position via a further recess extending from a side surface of the carbon brush.
  • the sleeve is fixed in position via a pin arranged in the second recess. Tamping over the second recess is also possible.
  • the second recess runs exclusively within one of the carbon brush layers.
  • the measures according to the invention ensure that the signal wire is securely fixed.
  • the use of metal such as brass as the sleeve material ensures, due to its hardness, that it can be easily inserted into the carbon brush even if the geometry of the recess and sleeve are closely coordinated.
  • the metal material also ensures problem-free gluing in the carbon brush, which would otherwise lead to considerable problems when using plastic. By squeezing like crimping the sleeve and signaling wire, it experiences an immovable and therefore clear positioning.
  • the edge sits on the shoulder or bottom of the first recess, which is preferably a stepped bore, and metered adhesive is added to the edge of the sleeve, that is to say the sleeve is not actually glued into the bore, thermal expansion of the adhesive cannot be so great occur that would otherwise lead to cracking. Nevertheless, fixation by the adhesive is ensured, since the adhesive is drawn into the joint between the sleeve and the wall of the carbon brush recess for hardening and only a correspondingly thin adhesive layer is formed.
  • the teachings according to the invention are suitable for all types of carbon brushes which have a signaling strand, i.e. those which have only one signaling strand or those which, in addition to the signaling strand, comprise only a shutdown device and / or a current-conducting helical compression spring and / or a current-conducting strand.
  • a carbon brush with a cuboid or cylindrical geometry with side or end faces, with one end face being able to be placed against a commutator or slip ring of an electric motor, comprising current-carrying wire arranged in the carbon brush, optionally with an insulating material that is spring-biased in the longitudinal axis of the carbon brush Shut-off nipple and a signaling wire, which extends with a section of a preferably in the longitudinal direction of the carbon brush (First) recess such as a hole is arranged and fixed in position in order to generate a signal to indicate a certain consumption of carbon brushes by interacting with the commutator or slip ring, the carbon brush being characterized in that the signaling wire extends over a (second) Recess is fixed in position.
  • 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.
  • 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 (24), on which the helical spring (18) is supported, can additionally be arranged between the ramming powder (22) covering the shut-off nipple (14) and the end face facing it.
  • 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) running in the bore (30) can additionally be surrounded by teflon material (31).
  • 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 mounted Signaling wire (28) abuts a shoulder (36) of the stepped bore (30).
  • the length of the sleeve (32) is less than the section (26) surrounded by it. Consequently, the free end (38) of the section (26) extends in a space (44) which extends 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), wherein the edge (34) of the sleeve (32) rests 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 dimensioned so that the pin (76) rests on the free upper 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 .
  • the sleeve by a side surface and Fixing the recess, preferably perpendicular to the longitudinal axis of the sleeve, by stamping carbon material into it, for example.
  • a position fixation can also be done by, for example, a fastening element such as a screw.
  • FIG. 6 shows a cross section of a further carbon brush (100) designed according to the invention, 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 the section (124) has a sheathing preferably made of Teflon.
  • the free end is insulated with an adhesive.
  • the signaling wire (122) is cut off beforehand and pretreated with an etchant, in order to then be immersed in an adhesive which is 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) passes over the shut-off nipple (118) is lifted off the commutator or slip ring.
  • 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 (124) and thus the signaling wire (122) are fixed in position.
  • 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)
EP93111727A 1992-09-02 1993-07-22 Balai en charbon Expired - Lifetime EP0585591B1 (fr)

Priority Applications (1)

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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9211524U DE9211524U1 (de) 1992-01-23 1992-09-02 Kohlebürste
DE9211524U 1992-09-02

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP96104231A Division EP0723318B1 (fr) 1992-09-02 1993-07-22 Balai en charbon
EP96104231.4 Division-Into 1993-07-22

Publications (2)

Publication Number Publication Date
EP0585591A1 true EP0585591A1 (fr) 1994-03-09
EP0585591B1 EP0585591B1 (fr) 1997-03-05

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 Before (1)

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

Country Status (3)

Country Link
EP (2) EP0723318B1 (fr)
AT (2) ATE185455T1 (fr)
DE (2) DE59305574D1 (fr)

Cited By (6)

* 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
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
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
WO2013178791A1 (fr) 2012-05-31 2013-12-05 Schunk Wien Gesellschaft M.B.H. Balai de charbon doté de poudre isolante compactée
WO2013178790A1 (fr) * 2012-05-31 2013-12-05 Schunk Kohlenstofftechnik Gmbh Balai de carbone avec douille de centrage
CN101533985B (zh) * 2008-03-06 2015-03-25 申克碳化技术股份有限公司 制造接触装置的方法与接触装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128457A1 (de) * 1970-06-23 1971-12-30 Lorraine Carbone Befestigung von Abschaltvorrichtungen an Schleifkontakten von elektrischen Maschinen
DE2461374A1 (de) * 1974-12-24 1976-07-08 Rheinische Kohlebuerstenfabrik Kohlebuerste mit abschaltvorrichtung
DE4034030A1 (de) * 1990-10-26 1992-04-30 Schunk Kohlenstofftechnik Gmbh Kohlebuerste
EP0512234A2 (fr) * 1991-04-06 1992-11-11 Schunk Kohlenstofftechnik GmbH Balai en charbon

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589549A (ja) * 1981-07-03 1983-01-19 Toshiba Corp 軸接地装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128457A1 (de) * 1970-06-23 1971-12-30 Lorraine Carbone Befestigung von Abschaltvorrichtungen an Schleifkontakten von elektrischen Maschinen
DE2461374A1 (de) * 1974-12-24 1976-07-08 Rheinische Kohlebuerstenfabrik Kohlebuerste mit abschaltvorrichtung
DE4034030A1 (de) * 1990-10-26 1992-04-30 Schunk Kohlenstofftechnik Gmbh Kohlebuerste
EP0512234A2 (fr) * 1991-04-06 1992-11-11 Schunk Kohlenstofftechnik GmbH Balai en charbon

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 80 (E-168)(1225) 2. April 1983 & JP-A-58 009 549 ( TOKYO SHIBAURA DENKI ) 19. Januar 1983 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101533985B (zh) * 2008-03-06 2015-03-25 申克碳化技术股份有限公司 制造接触装置的方法与接触装置
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
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
WO2013178790A1 (fr) * 2012-05-31 2013-12-05 Schunk Kohlenstofftechnik Gmbh Balai de carbone avec douille de centrage
CN104380541A (zh) * 2012-05-31 2015-02-25 申克碳化技术股份有限公司 具有定心套管的炭刷
CN104380541B (zh) * 2012-05-31 2017-06-13 申克碳化技术股份有限公司 具有定心套管的炭刷
US9728925B2 (en) 2012-05-31 2017-08-08 Schunk Kohlenstofftechnik Gmbh Carbon brush having a centering sleeve

Also Published As

Publication number Publication date
ATE149750T1 (de) 1997-03-15
EP0723318A2 (fr) 1996-07-24
EP0723318B1 (fr) 1999-10-06
DE59309829D1 (de) 1999-11-11
EP0585591B1 (fr) 1997-03-05
DE59305574D1 (de) 1997-04-10
EP0723318A3 (fr) 1996-11-13
ATE185455T1 (de) 1999-10-15

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