EP0512234A2 - Balai en charbon - Google Patents

Balai en charbon Download PDF

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Publication number
EP0512234A2
EP0512234A2 EP92105172A EP92105172A EP0512234A2 EP 0512234 A2 EP0512234 A2 EP 0512234A2 EP 92105172 A EP92105172 A EP 92105172A EP 92105172 A EP92105172 A EP 92105172A EP 0512234 A2 EP0512234 A2 EP 0512234A2
Authority
EP
European Patent Office
Prior art keywords
carbon brush
sleeve
wire
recess
section
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
EP92105172A
Other languages
German (de)
English (en)
Other versions
EP0512234A3 (en
EP0512234B1 (fr
Inventor
Anton Svoboda
Edmund Kübler
Horst Ulm
Günter Schardt
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 EP0512234A2 publication Critical patent/EP0512234A2/fr
Publication of EP0512234A3 publication Critical patent/EP0512234A3/de
Application granted granted Critical
Publication of EP0512234B1 publication Critical patent/EP0512234B1/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

Definitions

  • the invention relates to a carbon brush, preferably with a current-conducting strand stamped into it, optionally with a shut-off nipple made of insulating material and spring-biased in the longitudinal axis of the carbon brush, and with a signaling wire which is used to indicate a specific consumption of carbon brushes by a commutator or slip ring interacting with the carbon brush to release one Signal in electrically conductive contact section is arranged in the preferably extending in the longitudinal direction of the carbon brush 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 looped or. U-shaped 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, it can lead to problems to arrange it clearly in the sleeve.
  • EP 0 232 209 A1 uses optical means to detect carbon brush wear Conductor used to send or receive light signals.
  • 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 hold 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 problem of developing a carbon brush of the type described at the outset in such a way that the carbon brush can be equipped with the signaling wire in a manner which is 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.
  • the smallest possible diameter should also be used the recess are needed.
  • the use of metal 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 thus clear positioning.
  • a carbon brush of the type described in the introduction with a receptacle receiving the signaling wire and consisting of insulating material, such as a sleeve or cap, the receptacle being arranged completely inside and at a distance from the free outer surface of the carbon brush.
  • the teachings according to the invention make it possible to assemble carbon brushes with signaling wires in accordance with the machine.
  • the insulated signal wire which is generally surrounded by Teflon, can be cut to the desired length in an automatic assembly machine.
  • 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 which, in addition to the signaling strand, comprise only a switch-off device and / or a current-conducting helical compression spring and / or a current-conducting strand.
  • the cut-off signal wire is then inserted into the sleeve, which is made of metal such as brass, and is non-positively connected to it by preferably crimping. It can be ensured by a stop that the free end of the signal wire protrudes with a desired length over the free end of the sleeve, which in turn can be clearly defined in the recess of the carbon brush.
  • the sleeve can have a peripheral and flange-like edge, which can be placed on the outside of the carbon brush.
  • the sleeve has a circumferential flange-like edge which is embedded in a recess of the carbon brush which is adapted to this and preferably in the form of a cylindrical disk.
  • the outer upper surface of the edge of the sleeve can be aligned with or essentially with the associated carbon brush surface.
  • the sleeve with the signaling wire itself is preferably fixed in the carbon brush by means of an adhesive.
  • the adhesive material can already be present in the recess before attaching the sleeve, so that when the signaling wire is inserted into the recess, like hole, the wire is introduced into an insulating sheath, so that undesired premature electrically conductive contact between the signaling wire end and the walls of the Coal recess is excluded.
  • adhesive for fixing the sleeve can be introduced between the edge and the preferably annular and facing recess of the carbon brush.
  • the signal wire stripped in its end region - because of the poor adhesive ability of Teflon - is stripped into a preferably closed sleeve z. B. glued in plastic. Then this prefabricated part is preferably brought into the base of the receptacle like a hole in the carbon brush and fixed in position by means of adhesive material. Since the receptacle is closed at the bottom or is at least largely closed, the core of the signal wire does not come into contact with the wall of the carbon brush surrounding the receptacle. The stripping results in the signaling wire being securely stuck in the receptacle, even if there is no intimate connection between the adhesive material and the teflon material running above the stripped section.
  • the section of the signal wire running within the carbon brush runs in a straight line, preferably essentially parallel to its longitudinal axis. Due to the straight course, the recess for the receptacle or the sleeve can have a relatively small diameter of z. B. have 2 mm.
  • a section of a carbon brush (10) is shown, in which a current-carrying wire (12) and a shut-off nipple (14) are arranged (Fig. 2/3 ).
  • the shut-off nipple (14) consists of insulating material and is spring-biased in the direction of the longitudinal axis (16) of the carbon brush (12), preferably by means of a helical spring (18).
  • Both the stranded wire (12) and the shut-off nipple (16) are stamped into powder metal (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.
  • FIGS. 2 and 3 The elements described so far and which can be seen in FIGS. 2 and 3 are known from the prior art and can also undergo known modifications.
  • 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 signal wire can also run at an oblique or a right angle to the longitudinal axis.
  • the section (26) of the signaling wire (28) extending in the bore (30) runs in a straight line, in the longitudinal direction of the recess (30) like the bore.
  • the end region (27) of the section (26) is received, in particular glued, by a receptacle (29) designed as a sleeve closed on one side, which in turn is arranged in the recess (30) and is also glued in by means of adhesive material (33).
  • the receptacle (29) which shows a sleeve or cap shape, ensures a secure positional fixation of the section (26) or (27) of the signaling wire (28) within the carbon brush (10).
  • the section (27) is glued inside the receptacle (29), that is, surrounded by adhesive material.
  • the free end (35) of section (27) is stripped.
  • the core of the signal wire (28) is not covered by insulating material and the Teflon sheath (31).
  • the adhesive material (33) can consequently create a connection between the core (27) of the signaling wire (28) and the receptacle (29), which is otherwise not possible between the Teflon material and the adhesive material (33).
  • the covering (29) is closed in the area facing the bottom of the recess (30) or at least closed to such an extent that the tip of the core (27) hits the inside bottom (37) of the receptacle (29), i.e. not in an uncontrolled conductive connection can get with the carbon brush (10). This takes place only when the carbon brush (10) is worn to an extent that the bottom of the receptacle (29) is rubbed off and thus the end of the signal wire (28) can come into conductive connection with a commutator or slip ring.
  • the receptacle (29) itself which at least on its surface consists of electrically insulating material, but preferably completely of plastic only has to have a small wall thickness
  • the recess (30) which is preferably designed as a bore, can have an extremely small diameter of, for. B. have only 2 mm.
  • the receptacle (29) with the signaling wire (28) only has to be glued into this receptacle (30) with thin walls, consequently only a small amount of adhesive material expands when heated, a virtually stress-free insertion into the carbon brush (10) takes place, so that this results in the advantage that the wall thickness between the recess (30) and the outside of the carbon brush (10) can be chosen to be quite small. Consequently, the teaching according to the invention can also be used with very small carbon brushes.
  • the receptacle (29) is arranged completely in the recess (30). 1 also shows that the upper edge of the receptacle (29) facing the opening of the bore (30) extends at a distance from the surface from which the recess (30) extends.
  • the receptacle (29) is completely surrounded by adhesive material (33) within the recess (30).
  • the signaling wire (28) with its sections (26) and (27) extends into this adhesive material, a mentioned adhesive connection being mentioned between the stripped part (27) of the signaling wire (28) and the adhesive material (33), but not between the Teflon jacket (38) and the latter.
  • the signaling wire shown in FIGS. 2 and 3 and provided with the reference symbol (38) also runs in a straight line in a recess such as bore (40) of the carbon brush (10).
  • This section (42) consequently extends parallel or substantially parallel to the longitudinal axis (16) of the carbon brush (10).
  • the free end (44) of the section (42) is arranged at a preselected distance from the bottom (46) of the bore (40). The distance can be clearly defined. This is possible because the signaling wire (38) is received with its section (42) in the bore by a sleeve (48) and fixed in position.
  • the sleeve (48) itself has a circumferential flange-like edge (50) or collar which, according to FIG. 2, bears on the outer surface (52) which surrounds the bore (40).
  • the sleeve (48) itself is fixed in position by an adhesive material (54) which is inserted into the recess or bore (40) before the sleeve (48) and thus the signaling wire (38) is inserted.
  • the free end (44) sets that can be uninsulated in the cut surface, a drop of adhesive (46), which additionally ensures that an undesirable conductive contact between the walls of the bore (40) and the section (42) the signal wire (38) is omitted. Rather, a corresponding electrically conductive contact is only made when the carbon brush (10) is worn to the extent that a commutator or slip ring (not shown) of an electrical machine comes into contact with the free end (44) of the section (42).
  • the free end (44) lies below the bottom surface (56) of the recess in which the shut-off nipple (14) is arranged.
  • the signal wire (38) is also surrounded by a Teflon sheath (31). This ends at a distance from the free end face of the core of the signaling wire (38), as indicated in Fig. 2.
  • this is not a mandatory feature, rather the soul can also be completely covered on the outside by the Teflon jacket (31), since, for. B. when crimping the sleeve (48) and signaling wire (38), the soul retreats easily into the insulation.
  • the crimped or crimped edge of the sleeve (48) and signaling wire (38) is provided with the reference symbol (53).
  • FIG. 2 differs from that in FIG. 3 in that the circumferential edge (50) is embedded in a recess (55) of the outer surface (52) that is adapted to it, that is to say a cylindrical disc.
  • adhesive material is only introduced into the recess (55), which is then distributed to the required extent when the sleeve (48) is subsequently inserted, as a result of which the connection between the sleeve (48) and the carbon brush (10) is ensured.
  • Fig. 3 further illustrates that the crimping (area 53) of the Teflon jacket (31) in its end area (57) opposite the end face (59) of the core of the signaling wire (31).
  • the soul should the soul be exposed, as shown in FIG. 2, at least the end face should be covered with an insulating material such as drops of adhesive.
  • the signal strands (28) and (38) with their sections (26) and (42) can be introduced into the corresponding recesses or bore (30) or (40) of the carbon brush (10) in a manner suitable for automatic machines.
  • the further advantage is that the bores (30) and (40) receiving the signaling wires (28) and (38) only require a small diameter.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
EP92105172A 1991-04-06 1992-03-26 Balai en charbon Expired - Lifetime EP0512234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111206 1991-04-06
DE4111206A DE4111206A1 (de) 1991-04-06 1991-04-06 Kohlebuerste

Publications (3)

Publication Number Publication Date
EP0512234A2 true EP0512234A2 (fr) 1992-11-11
EP0512234A3 EP0512234A3 (en) 1993-01-20
EP0512234B1 EP0512234B1 (fr) 1996-01-10

Family

ID=6428990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105172A Expired - Lifetime EP0512234B1 (fr) 1991-04-06 1992-03-26 Balai en charbon

Country Status (2)

Country Link
EP (1) EP0512234B1 (fr)
DE (2) DE4111206A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585591A1 (fr) * 1992-09-02 1994-03-09 Schunk Kohlenstofftechnik GmbH Balai en charbon
DE4315622A1 (de) * 1993-05-11 1994-11-17 Schunk Kohlenstofftechnik Gmbh Kohlebürste sowie Verfahren zum Anordnen und Befestigen einer Meldelitze in einer solchen
DE10155991C2 (de) * 2001-11-15 2003-12-24 Schunk Kohlenstofftechnik Gmbh Kohlebürste
WO2013178791A1 (fr) 2012-05-31 2013-12-05 Schunk Wien Gesellschaft M.B.H. Balai de charbon doté de poudre isolante compactée
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
EP3427352B1 (fr) 2016-03-08 2020-07-08 Krones AG Transmetteur à bague collectrice pour machines à plateaux tournants

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010031415B4 (de) 2010-07-15 2016-07-07 Schunk Kohlenstofftechnik Gmbh Kohlebürste

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2223858A1 (en) 1973-03-26 1974-10-25 Salev Electrical machine imbalance detection cct. - gives alarm or disconnects supply to prevent slipring damage
DE2804547A1 (de) 1978-02-03 1979-08-09 Licentia Gmbh Kohlebuerste fuer kollektormotoren
EP0232209A1 (fr) 1986-01-06 1987-08-12 FERRAZ Société Anonyme Dispositif pour la détection du seuil d'usure des contacts électriques du type à frottement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RO54721A2 (fr) * 1970-07-21 1973-08-20
DE8410541U1 (de) * 1984-04-04 1984-07-12 Schleifring und Apparatebau GmbH, 8080 Fürstenfeldbruck Bürste zur Stromübertragung
DE8433023U1 (de) * 1984-11-10 1985-02-07 Deutsche Carbone Ag, 6000 Frankfurt Elektrische kohlebuerste mit meldekontakt

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2223858A1 (en) 1973-03-26 1974-10-25 Salev Electrical machine imbalance detection cct. - gives alarm or disconnects supply to prevent slipring damage
DE2804547A1 (de) 1978-02-03 1979-08-09 Licentia Gmbh Kohlebuerste fuer kollektormotoren
EP0232209A1 (fr) 1986-01-06 1987-08-12 FERRAZ Société Anonyme Dispositif pour la détection du seuil d'usure des contacts électriques du type à frottement

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585591A1 (fr) * 1992-09-02 1994-03-09 Schunk Kohlenstofftechnik GmbH Balai en charbon
DE4315622A1 (de) * 1993-05-11 1994-11-17 Schunk Kohlenstofftechnik Gmbh Kohlebürste sowie Verfahren zum Anordnen und Befestigen einer Meldelitze in einer solchen
EP0624937A1 (fr) * 1993-05-11 1994-11-17 Schunk Kohlenstofftechnik GmbH Balai de charbon ainsi qu'un procédé pour arranger et fixer un conducteur torsade de contrôle dans celui-ci
US5488261A (en) * 1993-05-11 1996-01-30 Schunk Kohlenstofftechnik Gmbh Carbon brush and fastening a braided indicator wire therein
DE10155991C2 (de) * 2001-11-15 2003-12-24 Schunk Kohlenstofftechnik Gmbh Kohlebürste
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
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
EP3427352B1 (fr) 2016-03-08 2020-07-08 Krones AG Transmetteur à bague collectrice pour machines à plateaux tournants
US11056849B2 (en) 2016-03-08 2021-07-06 Krones Ag Slip ring transmitter for rotary-table machines

Also Published As

Publication number Publication date
EP0512234A3 (en) 1993-01-20
DE4111206A1 (de) 1992-10-08
EP0512234B1 (fr) 1996-01-10
DE59204973D1 (de) 1996-02-22

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