EP3895259B1 - Bürstenmodul und verfahren zur montage - Google Patents

Bürstenmodul und verfahren zur montage Download PDF

Info

Publication number
EP3895259B1
EP3895259B1 EP19812703.7A EP19812703A EP3895259B1 EP 3895259 B1 EP3895259 B1 EP 3895259B1 EP 19812703 A EP19812703 A EP 19812703A EP 3895259 B1 EP3895259 B1 EP 3895259B1
Authority
EP
European Patent Office
Prior art keywords
brush
tab
fastening
brush holder
holder
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.)
Active
Application number
EP19812703.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3895259A1 (de
Inventor
Ludwig KAIN
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 Carbon Technology GmbH
Original Assignee
Schunk Carbon Technology 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 Carbon Technology GmbH filed Critical Schunk Carbon Technology GmbH
Publication of EP3895259A1 publication Critical patent/EP3895259A1/de
Application granted granted Critical
Publication of EP3895259B1 publication Critical patent/EP3895259B1/de
Active 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
    • H01R39/38—Brush holders
    • H01R39/41—Brush holders cartridge type
    • 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
    • H01R39/385—Means for mechanical fixation of the brush 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
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/38—Brush holders
    • H01R39/381—Brush holders characterised by the application of pressure to brush

Definitions

  • Such brush modules are well known from the prior art and are regularly used to position and attach a brush to, for example, a slip ring or a commutator of an electric motor.
  • the brush which can be a carbon brush, for example, is then arranged in a brush holder, with the brush holder essentially surrounding the brush on its longitudinal sides.
  • the brush is accommodated in the brush holder and can be moved longitudinally is acted upon in the direction of the slip ring with a spring force, so that the brush is pressed against the slip ring to produce an electrical contact connection.
  • the assembly device essentially serves to simplify assembly of the brush holder on the electrical machine.
  • the assembly device is formed from a U-shaped sheet metal angle, which overlaps the brush holder and has two laterally protruding fastening tabs.
  • the brush holder is therefore inserted into the U-shaped sheet metal angle essentially without play, so that the brush holder can be fixed to the U-shaped sheet metal angle in the manner of a clamp on the electrical machine adjacent to the slip ring.
  • the fastening straps can be screwed to the electrical machine or to a mounting surface on which the brush holder and the fastening straps lie by means of screws.
  • the brush module according to the invention for an electrical machine has at least one brush for making electrical contact with a slip ring of the machine, the brush module having an assembly device and a brush holder for receiving and holding the brush, the assembly device being designed as a U-shaped sheet metal angle which overlaps the brush holder, the sheet metal angle having laterally protruding fastening lugs for fastening the brush holder to a mounting surface, a reach-through opening being formed in the brush holder, a holding shackle formed on a fastening shackle of the sheet-metal angle engaging in the reach-through opening and the brush in a restraining position held positively in the brush holder, the fastening tab with the retaining tab being inclined by an angle ⁇ relative to the mounting surface of the brush holder, the fastening tab being designed to be tiltable by the angle ⁇ to rest on the mounting surface, with an inclination by the angle ⁇ the retaining tab can release the brush and move the brush to a contact position.
  • the brush module for the rotating electrical machine accordingly has the brush holder, which is designed in the manner of a shaft and accommodates the brush or carbon brush in a longitudinally movable manner.
  • the brush holder is surrounded by the mounting device or the U-shaped sheet metal bracket for mounting the brush holder on the electric machine in the manner of a clamp, so that the brush holder on the mounting surface rests on the electrical machine.
  • the fastening lugs are arranged laterally on the U-shaped sheet metal angle in such a way that, based on a longitudinal axis of the sheet metal angle, they project laterally from the latter in opposite directions.
  • the fastening lugs rest together with the brush holder on the mounting surface or are arranged in a common mounting plane.
  • the brush holder is also designed in such a way that the holding lug, which in turn engages in the reach-through opening of the brush holder, is embodied on at least one fastening lug of the sheet metal angle.
  • the retaining tab holds the brush in the retaining position in the brush holder in such a way that the brush does not protrude too far out of the brush holder and could be a hindrance when mounted on an electrical machine.
  • the fastening lug is formed with the retaining lug inclined by the angle ⁇ relative to the mounting surface or to the mounting plane. This means that when the brush module is placed on the mounting surface on the electrical machine, at least the fastening lug with the retaining lug does not rest on the mounting surface, but instead protrudes from it in accordance with the inclination of the angle ⁇ . A wedge-shaped, free space is then formed between the mounting surface and the relevant fastening strap. When the fastening straps of the electric machine are fastened, for example by screwing, the fastening strap with the holding strap is then necessarily pressed against the mounting surface, so that all the fastening straps lie in the mounting plane.
  • the fastening lug with the holding lug is consequently pivoted through the angle ⁇ , with the holding lug then being able to release the brush in the restrained position.
  • the brush can thus be released in one operation with the attachment of the brush module to the electrical machine and transferred to a contact position without having to remove special attachment means on the brush.
  • An assembly of the brush module can be significantly simplified.
  • the angle ⁇ is 5° to 50°.
  • the angle ⁇ can then be dimensioned such that the retaining tab is moved by a distance that is required to release the brush by pivoting the relevant fastening tab by the angle ⁇ .
  • through-openings for a screw can be formed in the fastening straps.
  • the through-openings can be in the form of a bore, a slot or a slit. It is essential that the through-openings can be penetrated by a screw or another fastening means, such as a rivet or the like. It is then possible to securely fasten the brush module to the electrical machine with a non-positive and/or positive fit. If the passage openings are formed with sufficient play, fine adjustment of the brush module is also possible possible in the mounting position.
  • the fastening lug with the holding lug can then also be deformed with a screw in such a way that the fastening lug is inclined by the angle ⁇ .
  • the fastening lug which has the retaining lug, is connected to the U-shaped sheet metal angle via a flexible hinge.
  • the fastening lug can then be formed integrally with the U-shaped sheet metal angle without a special arrangement or fastening of the fastening lug on the U-shaped sheet metal angle being required.
  • the bendable hinge can then be formed by the U-shaped sheet metal angle or the fastening strap itself.
  • the holding tab can also be formed by the fastening tab itself.
  • Such a sheet metal angle can be produced inexpensively simply by punching out and bending sheet metal.
  • the brush can be designed with a groove running in the direction of a longitudinal axis of the brush, in which the retaining tab can engage, wherein the groove can form a shoulder at a proximal end of the brush, the retaining tab together with the shoulder forming a rear stop for the brush can form.
  • the groove can therefore be formed in the brush along the latter without running continuously in the latter. If the groove is not formed all the way to the proximal end of the brush, a shoulder remains at the end of the groove, which enables the brush to be held in a form-fitting manner in the brush holder by resting on the holding tab.
  • a guide tab can be formed at a distal end of the brush holder, which guide tab engages in the groove, the guide tab forming a front stop for the brush together with the shoulder.
  • the guide tab can be formed in the manner of a bead in a wall of the brush holder, the bead then engaging in the groove.
  • the shoulder formed by the groove comes to rest on the guide tab when the brush is almost completely moved out of the brush holder. This can be the case, for example, when the brush is largely used up due to abrasive wear is.
  • the formation of the front stop can prevent the brush from falling out of the brush holder.
  • the brush holder can have a positioning recess into which a positioning tab formed by the sheet metal angle engages. Accordingly, a further tab can be formed on the U-shaped sheet metal angle, which engages positively in the positioning recess and thus enables precise positioning of the brush holder relative to the U-shaped sheet metal angle. An assembly of the brush holder and the U-shaped sheet metal angle is then possible simply by plugging them together without requiring a special alignment in the desired relative position.
  • the sheet metal bracket can have the positioning recess and the brush holder can have the positioning tab.
  • a plurality of positioning recesses can also be provided, so that positioning in different, predetermined positions is possible.
  • the sheet metal angle can have laterally protruding positioning tabs, which are arranged parallel to one another, for fastening the brush holder to parallel side surfaces of a carrier forming the mounting surface.
  • the relative spacing of the positioning tabs can be dimensioned in such a way that the brush holder or the sheet metal bracket can be attached to the carrier and can be fixed between the positioning tabs with the formation of spring tension.
  • the brush module can be attached to the carrier like this simply be pre-positioned, which makes it easier to assemble the brush module. Holding the brush module or aligning it more precisely is then no longer absolutely necessary in the case of manual assembly. Screwing screws into the carrier or the mounting surface is thus significantly simplified.
  • the electric machine according to the invention in particular an electric motor, therefore has a brush module according to the invention.
  • the electrical machine can be produced more cost-effectively as a result of the simplified assembly of the brush module.
  • the fastening tab is inclined by the angle ⁇ and brought into contact with the mounting surface, with the inclination by the angle ⁇ releasing the retaining tab and the brush is moved into a contact position.
  • the fastening lug is fastened to the mounting surface using a screw
  • the fastening lug is pivoted through the angle ⁇ in such a way that the fastening lug reaches the mounting plane, with the pivoting of the fastening lug also pivoting the holding lug through the angle ⁇ and out of the reach-through opening is moved so far that the brush is no longer held in a form-fitting manner in the brush holder or in the retention position of the holding tab.
  • the brush can now move out of the brush holder, preferably far enough for the brush to come into contact with the slip ring. Consequently, with the assembly of the brush module on the assembly surface of the electrical machine, the brush is also unlocked or released without a further work step being necessary.
  • a synopsis of Figures 1 to 4 shows a brush module 10 in different views.
  • the brush module 10 is used for electrical contacting of a slip ring of an electrical machine, not shown here, and includes a brush holder 11, a mounting device 12 and a brush 13.
  • the brush 13 consists essentially of a carbon material and is inserted into the brush holder 11 and held therein so that it can move longitudinally.
  • the brush holder 11 forms a receiving sleeve 14 for the brush 13 and includes a spring 15, which exerts a pressing force on the brush 13 in the direction of a longitudinal axis 16 of the receiving sleeve 14, so that the brush 13 is pressed with the pressing force against the slip ring, not shown here can.
  • FIGS. 1 and 2 show the brush module 10 before a final assembly on the carrier 20, the brush 13 being in a retention position 24 in the brush holder 11 here.
  • a reach-through opening 25 is formed in the brush holder 11, in which a holding tab 26, which is formed on a fastening tab 18, engages.
  • the retaining lug 26 holds the brush 13 in a form-fitting manner in the retaining position 24 , the fastening lug 18 with the retaining lug 26 being inclined at an angle ⁇ relative to the mounting surface 19 .
  • a groove 27 is formed in the brush 13 and forms a shoulder 29 at a proximal end 28 of the brush 13 .
  • the retaining tab 26 engages in the groove 27 and, by resting against the shoulder 29, prevents the brush 13 from being pushed out of the receiving sleeve 14 by the spring 15.
  • the 3 and 4 show the brush module 10 after the brush module 10 has been mounted on the carrier 20 by screwing it to the carrier 20.
  • the fastening tabs 18 are arranged here in a common mounting plane 30 with the mounting surface 19. When screwing, the fastening tabs 18 are bent or approached by the respective angles ⁇ and ⁇ in the direction of the mounting plane 30 or the mounting surface 19 until they lie flat against the mounting surface 19 .
  • the fastening tab 18 is pivoted with the retaining tab 26, the retaining tab 26 is moved out of the groove 27 so far that the shoulder 29 is released.
  • the brush 13 can now be pushed into the in 4 shown contact position 31 or the position reached at the wear end of the brush 13 can be moved.
  • a guide tab 33 is formed on a distal end 32 of the receiving sleeve 14, which engages in the groove 27 and on which the shoulder 29 rests can reach.
  • the guide tab essentially prevents the brush 13 from falling out of the receiving sleeve 14.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
EP19812703.7A 2018-12-13 2019-11-15 Bürstenmodul und verfahren zur montage Active EP3895259B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018132050.7A DE102018132050B3 (de) 2018-12-13 2018-12-13 Bürstenmodul und Verfahren zur Montage
PCT/EP2019/081423 WO2020120067A1 (de) 2018-12-13 2019-11-15 Bürstenmodul und verfahren zur montage

Publications (2)

Publication Number Publication Date
EP3895259A1 EP3895259A1 (de) 2021-10-20
EP3895259B1 true EP3895259B1 (de) 2023-08-30

Family

ID=68731943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19812703.7A Active EP3895259B1 (de) 2018-12-13 2019-11-15 Bürstenmodul und verfahren zur montage

Country Status (7)

Country Link
US (1) US11881666B2 (ko)
EP (1) EP3895259B1 (ko)
JP (1) JP7133098B2 (ko)
KR (1) KR20210100631A (ko)
CN (1) CN113196593B (ko)
DE (1) DE102018132050B3 (ko)
WO (1) WO2020120067A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022102602A1 (de) 2022-02-03 2023-08-03 Audi Aktiengesellschaft Fremderregte Elektromaschine
DE102022125661B4 (de) 2022-10-05 2024-06-06 Rolf Prettl Wellenkontaktierungsvorrichtung und System

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194620A (en) * 1937-10-27 1940-03-26 Emerson Electric Mfg Co Motor brush assemblage
US2947895A (en) * 1956-11-23 1960-08-02 Gen Electric Canada Brushgear assembly
JPS5351908U (ko) * 1976-10-06 1978-05-02
JPS58179144A (ja) * 1982-04-09 1983-10-20 Hitachi Ltd 小形回転電機用ブラシホルダ
DE3328683A1 (de) 1983-08-09 1985-02-21 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Elektrische maschine, insbesondere elektromotor
DE3432460A1 (de) * 1984-09-04 1986-03-13 Gardena Kress + Kastner Gmbh, 7900 Ulm Buerstenhalterung fuer eine schleifbuerste
DE3510897A1 (de) * 1985-03-26 1986-10-02 Robert Bosch Gmbh, 7000 Stuttgart Handwerkzeugmaschine mit einem elektromotor
US4963779A (en) * 1989-05-15 1990-10-16 Black & Decker, Inc. Brush holder for an electric motor
DE19725082A1 (de) * 1997-06-13 1999-01-07 Itt Mfg Enterprises Inc Kohlebürste für eine elektrische Maschine
DE19755507A1 (de) * 1997-12-13 1999-06-17 Fhp Motors Gmbh Bürstenhalterung für mechanisch kommutierte Elektromotoren
US6998754B2 (en) * 2004-03-05 2006-02-14 Energy Conversion Systems Holdings, Llc Brush assemblies
JP2010028917A (ja) * 2008-07-16 2010-02-04 Mitsuba Corp 電動モータ
JP2016136792A (ja) * 2013-05-13 2016-07-28 パナソニック株式会社 ブラシ保持器組立体及びそれを備えた整流子電動機
FR3013168A1 (fr) * 2013-11-08 2015-05-15 Valeo Equip Electr Moteur Porte-balais de machine electrique pour vehicule et demarreur correspondant
CN205565251U (zh) * 2016-03-18 2016-09-07 浙江亚特电器有限公司 一种碳刷结构

Also Published As

Publication number Publication date
WO2020120067A1 (de) 2020-06-18
US20220059979A1 (en) 2022-02-24
EP3895259A1 (de) 2021-10-20
DE102018132050B3 (de) 2020-02-06
CN113196593B (zh) 2023-05-26
JP2022513759A (ja) 2022-02-09
JP7133098B2 (ja) 2022-09-07
CN113196593A (zh) 2021-07-30
KR20210100631A (ko) 2021-08-17
US11881666B2 (en) 2024-01-23

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