EP3642910B1 - Contact de mise à la terre - Google Patents

Contact de mise à la terre Download PDF

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Publication number
EP3642910B1
EP3642910B1 EP18722385.4A EP18722385A EP3642910B1 EP 3642910 B1 EP3642910 B1 EP 3642910B1 EP 18722385 A EP18722385 A EP 18722385A EP 3642910 B1 EP3642910 B1 EP 3642910B1
Authority
EP
European Patent Office
Prior art keywords
brush
brush shaft
base plate
shaft
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
EP18722385.4A
Other languages
German (de)
English (en)
Other versions
EP3642910A1 (fr
EP3642910C0 (fr
Inventor
Sebastian SCHELLER
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.)
Stemmann Technik GmbH
Original Assignee
Stemmann Technik 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 Stemmann Technik GmbH filed Critical Stemmann Technik GmbH
Publication of EP3642910A1 publication Critical patent/EP3642910A1/fr
Application granted granted Critical
Publication of EP3642910C0 publication Critical patent/EP3642910C0/fr
Publication of EP3642910B1 publication Critical patent/EP3642910B1/fr
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
    • H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder

Definitions

  • the invention relates to a grounding contact for the controlled steering of electrical current according to the features of patent claim 1.
  • a grounding contact represents a low-resistance bridge that protects the critical points of a component from damage caused by high currents.
  • grounding contacts conduct electricity around critical points such as wheel bearings.
  • a holding device for brushes which forms a reverse current and/or grounding contact between parts moving relative to one another on rail vehicles.
  • the holding device has at least one metallic brush shaft, in which a brush is displaceably arranged, and at least one pressure device which is held in a recess on the brush shaft and exerts a force on one end of the brush.
  • the brush shaft merges into a base plate in one piece.
  • the base plate with the brush shaft is a cast component.
  • the brush shafts are attached to load-bearing components using a grub screw or a union nut.
  • a grub screw or a union nut The insertion of brush holders into pocket-like recesses in a cylindrical housing is known from the prior art, with the brush holders being held in position by a cover.
  • Brush holders can be made in one piece from plastic by injection molding or can also be connected to a housing via purely non-positive screw connections.
  • the invention is based on the object of providing a grounding contact with a compact and robust brush holder that is inexpensive and easy to produce and suitable for standardization.
  • the invention relates to a grounding contact for the controlled control of electrical current. It includes a brush holder with a base plate and with at least one brush shaft for holding a brush. The at least one brush shaft is positively connected to the base plate.
  • the advantage of the grounding contact according to the invention is the modular design with regard to the brush shaft.
  • the base plate and the brush shaft can be manufactured separately using laser and water jet cutting processes. Model and tool costs for the mold in the casting process are eliminated. Processing with a laser and water jet process leads to a lower metal removal volume. The entire brush shaft no longer needs to be cleared by machining.
  • the modular construction principle of the brush holder allows the flexibility of the manufacturing process to be improved and production times to be reduced. According to the invention, the modular construction principle of the brush holder makes it possible to standardize the brush shaft regardless of the design of the base plate and to produce it as a mass product.
  • the invention provides for the brush shaft to be designed as a standard component for the current brushes with dimensions of 40 x 20 mm or 32 x 12.5 mm. Standardized brush shafts with other dimensions can also be used in the invention.
  • the brushes are preferably metal-graphite brushes, also known as carbon brushes. However, the brushes can also be made of other metals or metal alloys with high electrical conductivity and contain, for example, copper, silver or molybdenum.
  • the grounding contact has contact means in the form of strands that can be connected to the base plate and conduct the electrical current to the brush.
  • the strands are flexible and allow the brushes to be tracked under the influence of a spring force.
  • the connection between the base plate and the strands is made via tubular cable lugs on the strands, which can be screwed to the base plate in an electrically conductive manner.
  • the base plate has at least one brush shaft receptacle to accommodate the at least one brush shaft.
  • the form-fitting connection between the base plate and the brush shaft makes installation easy and, if necessary, easy to replace the brush shaft, e.g if the brush shaft is damaged or worn.
  • the positive connection is detachable.
  • the supporting base plate is preferably a flat plate made of an electrically conductive material, in particular metal.
  • the brush shaft has clamping tongues, via which the brush shaft is clamped to the base plate.
  • the clamping tongues have hooks at their free ends, which reach behind an edge of the brush shaft holder in the base plate.
  • the clamping tongues are preferably arranged on at least three sides of the brush shaft. Since the brushes are essentially rectangular, the brush shaft also has a substantially rectangular cross section. A diametrical arrangement of clamping tongues is ideal. An arrangement of three clamping tongues also enables the brush shaft to be adequately fixed.
  • a positive connection with clamping tongues has the advantage that a connection between the base plate and the brush shaft is possible without additional fasteners, such as screws, pins or rivets, thereby eliminating the need for tools. This makes assembly easier.
  • the clamping force of the clamping tongues is chosen to be so large that they do not have to be secured against springing back using additional securing devices.
  • the brush shaft has a support surface for support on the base plate on the underside.
  • the support surface is preferably located adjacent to the fixed ends of the clamping tongues. As a result, the brush shaft is held clamped in a perpendicular direction to the base plate.
  • the brush shaft completely penetrates the brush shaft holder.
  • the clamping tongues or hooks protrude beyond the base plate. Through a combination of positive and clamping connections, the brush shaft is securely fixed and correct guidance of the brush is ensured.
  • the base plate can have a corresponding number of brush shaft holders for several brushes. This allows larger currents to be transmitted. Operational safety is also increased.
  • the base plate preferably has three brush shaft receptacles.
  • the individual brush shafts can preferably be manufactured separately. It is also possible to manufacture several brush shafts as a common component, which is then connected to the base plate.
  • a spring element In order to exert a spring force on the brush in the brush shaft in the longitudinal direction of the brush shaft, a spring element is provided, which is preferably designed as a roller band spring.
  • the spring element has the task of exerting a spring force on the brush, so that the brush is constantly in contact with a grinding wheel for power transmission.
  • the spring element is preferably fastened in the brush shaft.
  • a spring holder is mounted in the brush shaft so that the holding force for the spring element is absorbed by the brush shaft itself. No forces are introduced into the base plate.
  • the brush shaft including the spring holder and the spring element form an independent assembly that is intended for coupling to the base plate.
  • the brush shaft can be electrically conductive.
  • the brushes are connected to the base plate via the strands to carry current.
  • the brush shaft can therefore consist of electrically non-conductive material, in particular a plastic. This has the advantage that the entire grounding contact is lighter and also cheaper to manufacture.
  • the brush shaft can be produced inexpensively, particularly as an injection molded component. Another advantage is the good sliding properties of some plastics, which in turn is optimal for guiding the brush within the brush shaft.
  • the grounding contact preferably has a cover that protects the brush with electrical connections, contacts and strands.
  • the cover can be fastened to the base plate in a force-fitting and/or positive manner, for example using screws.
  • the Figures 1 and 2 show a brush holder 2, as is known from the prior art.
  • the brush holder 2 has a base plate 3 and a brush shaft 4.
  • the base plate 3 and the brush shaft 4 are made in one piece and made of the same material.
  • the brush shaft 4 shown is used to hold a brush, not shown.
  • the Figures 3 and 4 each show perspective views of a grounding contact 1 according to the invention.
  • the grounding contact 1 has a base plate 3, a brush shaft 4 and a brush 6.
  • the base plate 3 and the brush shaft 4 are not designed in one piece according to the invention.
  • the base plate 3 has a brush shaft receptacle 5 into which the brush shaft 4 is inserted.
  • the outer contour of the brush shaft 4 corresponds to the contour of the brush shaft holder 5 in the base plate 3, so that a precise fit of the brush shaft 4 within the brush shaft holder 5 of the base plate 3 is guaranteed.
  • An area above the base plate 3 is protected by a cover 7, which is attached to the base plate 3 by means of screws.
  • Figure 3 shows that one end of the brush 6 protrudes from the brush shaft 4. This one end of the brush 6 is in contact with a component (not shown) (slip ring) in order to dissipate electrical current via this component.
  • Figure 6 shows on an underside of the base plate 3 an electrically insulating lower plate 16 with a centrally arranged recess for the brush shaft 4.
  • Figure 5 shows the ground contact 1 according to the invention Figures 3 and 4 in a top view without cover 7.
  • the base plate 3 has a rectangular shape.
  • the brush shaft holder 5 for receiving the brush shaft 4 is arranged in the middle of the base plate 3.
  • the brush 6 is arranged in the brush shaft 4.
  • Electrical contact means 8 in the form of flexible strands are connected to the base plate 3 of the grounding contact 1 via two connections 9 and establish the current-conducting connection between the base plate 3 and the brush 6.
  • the brush 6 has two contact means 8 (strands), with the cable lugs 9 being fastened to the base plate 3 with screws.
  • the cable lugs 9 being fastened to the base plate 3 with screws.
  • At the opposite ends of the base plate 3 there are receptacles for tubular cable lugs 10, which are also attached to the base plate 3 by means of screws. The electrical current is fed to the base plate 3 for further transmission via supply lines (not shown) via the screwed-on tubular cable lugs 10.
  • Figure 6 makes a cut along line AA according to Figure 5 represents.
  • the ground contact 1 is closed with a cover 7, the cover 7 covering the contact means 8, the brush 6 and a large area of the base plate 3.
  • the brush shaft 4 completely penetrates the brush shaft receptacle 5.
  • the brush shaft 4 is clamped to the base plate 3 by means of clamping tongues 11 ( Figures 6 and 7 ). At their free ends 12, the clamping tongues 11 have hooks 17 which grip on an upper side of the base plate 3.
  • the top of the base plate 3 is the side on which the lid 7 is attached.
  • the underside of the base plate 3 is the side of the base plate 3 opposite the top.
  • the terms top and bottom or top and bottom are not restrictive for the installation position of the grounding contact 1.
  • the brush shaft 4 has a support surface 13 to support the base plate 3 on the underside. It essentially consists of a projection or a recess in the brush shaft 4, which, together with the hook 17 of the clamping tongue 11, represents a positive connection for receiving the base plate 3 ( Figure 7 ).
  • FIG. 7 shows a further sectional view of the ground contact 1 according to Figure 5 with lid 7.
  • Figure 7 shows a spring holder 14 for receiving a spring element 15.
  • the spring holder 14 is positively connected to the brush shaft 4.
  • the spring holder 14, together with the spring element 15 and the brush shaft 4, passes through the brush shaft receptacle 5.
  • the spring element 15 is a roller band spring that presses on the brush 6 from the top.
  • one end of the brush 6 rests on a rotating component, not shown, so that the brush 6 wears out.
  • the brush 6 is slidably mounted in the brush shaft 4, with the force exerted by the spring element pressing the brush 6 against the rotating component.
  • FIG. 8 shows a top view of a grounding contact 1 according to the invention with several brush shafts 4 and brushes 6.
  • the base plate 3 has a substantially round shape or, in plan view, pan-shaped, which is due to the connections for the power supply.
  • the base plate 3 has three brush shaft receptacles 5.
  • Two brush shaft receptacles 5 lie opposite each other, with a third brush shaft receptacle 5 being arranged to the side of the first two brush shaft receptacles 5.
  • the brush shafts 4 pass through the brush shaft receptacles 5 of the base plate 3 as separate components and are connected to it in a form-fitting and clamping manner via clamping tongues 11.
  • Brushes 6 are arranged in each of the three brush shafts 4, which have the above mentioned Contact means 8 and are connected to the base plate 3 by means of the connections 9.
  • FIG. 9 shows the section BB through Figure 8.
  • Figure 9 shows the spring element 15 in the form of a roller band spring, which pushes the respective brush 6 against a relatively movable component 18 (slip ring) for power transmission. Furthermore shows Figure 9 that the grounding contact 1 with its brush shafts 4 passes through a holder 19. The holder 19 runs essentially parallel to the base plate 3.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Elimination Of Static Electricity (AREA)

Claims (6)

  1. Contact de mise à la terre pour diriger de manière contrôlée du courant électrique avec un porte-balai (2), dans lequel le porte-balai (2) comprend une embase (3) et au moins un logement de balai (4) destiné à recevoir un balai (6) et dans lequel l'au moins un logement de balai (4) est relié à l'embase (3) par complémentarité de formes, dans lequel le logement de balai (4) présente des languettes de serrage (11) via lesquelles le logement de balai (4) est maintenu par serrage sur l'embase (3), dans lequel les languettes de serrage (11) possèdent des crochets (17) à leurs extrémités libres (12), lesquels viennent en prise derrière un bord d'un réceptacle de logement de balai (5) dans l'embase (3), dans lequel le logement de balai (4) possède une surface d'appui (13) pour l'appui côté inférieur sur l'embase (3), dans lequel le logement de balai (4) traverse entièrement le réceptacle de logement de balai (5), dans lequel la liaison par complémentarité de formes avec les languettes de serrage (11) est conçue de façon à réaliser une liaison entre l'embase (3) et l'au moins un logement de balai (4) sans vis ni utilisation d'outils.
  2. Contact de mise à la terre selon la revendication 1, caractérisé en ce que les languettes de serrage (11) sont disposées sur au moins trois côtés du logement de balai (4).
  3. Contact de mise à la terre selon la revendication 1 ou 2, caractérisé en ce que l'embase (3) présente plusieurs réceptacles de logement de balai (5).
  4. Contact de mise à la terre selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un élément de ressort (15) est disposé dans le logement de balai (4) pour exercer une force élastique (F) sur le balai (6) dans le logement de balai (4) dans la direction longitudinale du logement de balai (4).
  5. Contact de mise à la terre selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'élément de ressort (15) est fixé dans le logement de balai (4).
  6. Contact de mise à la terre selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le logement de balai (4) est composé de matière plastique.
EP18722385.4A 2017-06-23 2018-04-19 Contact de mise à la terre Active EP3642910B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017113911.7A DE102017113911B4 (de) 2017-06-23 2017-06-23 Erdungskontakt
PCT/DE2018/100374 WO2018233749A1 (fr) 2017-06-23 2018-04-19 Contact de mise à la terre

Publications (3)

Publication Number Publication Date
EP3642910A1 EP3642910A1 (fr) 2020-04-29
EP3642910C0 EP3642910C0 (fr) 2023-11-08
EP3642910B1 true EP3642910B1 (fr) 2023-11-08

Family

ID=62116157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18722385.4A Active EP3642910B1 (fr) 2017-06-23 2018-04-19 Contact de mise à la terre

Country Status (4)

Country Link
EP (1) EP3642910B1 (fr)
CN (1) CN110462945B (fr)
DE (1) DE102017113911B4 (fr)
WO (1) WO2018233749A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122625B (de) * 1956-01-02 1962-01-25 Hollandse Signaalapparaten Bv Elektrischer Apparat mit einer von einer Druckfeder an einen Kommutator oder Schleifring anzulegenden Buerste und einem Buerstenhalter
DE2541457A1 (de) * 1974-09-13 1976-04-08 Itw Fastex Italia Spa Buerstenhalter fuer gleichstrommotoren
US4876475A (en) * 1988-04-28 1989-10-24 Sunbeam Corporation Brush holder with plastic cup to retain biasing spring

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431446A (en) 1967-07-25 1969-03-04 Rae Motor Corp Electric motor brush holder,cap and spring
JPS594819U (ja) 1982-07-01 1984-01-12 日本サ−ボ株式会社 軸受
FR2615666B1 (fr) * 1987-05-21 1989-08-18 Peugeot Aciers Et Outillage Plaque porte-balais perfectionnee notamment pour moteur electrique
JPH0448134Y2 (fr) * 1987-05-29 1992-11-12
JPH0732568B2 (ja) * 1989-05-16 1995-04-10 アスモ株式会社 モータのブラシ保持構造
DE4127336A1 (de) * 1991-08-19 1993-02-25 Schunk Metall & Kunststoff Haltevorrichtung fuer an schienenfahrzeugen als rueckstrom- und/oder erdungskontakt eingesetzte buersten und verfahren zur herstellung einer solchen haltevorrichtung
EP0706727B1 (fr) * 1994-04-28 1998-06-17 Siemens Canada Limited Ensemble porte-balai
US5717271A (en) * 1995-01-27 1998-02-10 Mitsuba Corporation Brush holder device and method of molding same
DE19934558C2 (de) * 1999-07-22 2001-12-13 Temic Auto Electr Motors Gmbh Bürstenhalter für einen Kollektormotor
FR2802727B1 (fr) * 1999-12-20 2002-01-18 Valeo Equip Electr Moteur Boitier du moteur electrique d'un demarreur comportant un bourrelet d'etancheite et de centrage et demarreur comportant un tel boitier
DE10012739B4 (de) * 2000-03-16 2004-12-30 Schunk Metall Und Kunststoff Gmbh Erdungskontakt sowie Verfahren zur Herstellung eines Gleitkörpers wie einer Kontaktscheibe eines Erdungskontaktes
DE10013491C2 (de) * 2000-03-20 2002-10-24 Schunk Metall & Kunststoff Erdungskontakt
CN1288822C (zh) * 2001-03-17 2006-12-06 罗伯特·博施有限公司 伺服驱动机构及装配伺服驱动机构的方法
DE102004004745A1 (de) * 2004-01-30 2005-08-18 Robert Bosch Gmbh Bürstenhalter für eine Elektromaschine
JP4333754B2 (ja) * 2007-02-21 2009-09-16 株式会社デンソー 車両用交流発電機
CN201941802U (zh) * 2010-12-27 2011-08-24 南车青岛四方机车车辆股份有限公司 轨道车辆抱轴式接地装置
WO2013030615A1 (fr) * 2011-08-26 2013-03-07 Aktiebolaget Skf Ensemble doté de pièces rotatives à fluide conducteur pour retour par la terre
CN203119260U (zh) * 2012-12-07 2013-08-07 谢佐凌 一种碳刷架

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122625B (de) * 1956-01-02 1962-01-25 Hollandse Signaalapparaten Bv Elektrischer Apparat mit einer von einer Druckfeder an einen Kommutator oder Schleifring anzulegenden Buerste und einem Buerstenhalter
DE2541457A1 (de) * 1974-09-13 1976-04-08 Itw Fastex Italia Spa Buerstenhalter fuer gleichstrommotoren
US4876475A (en) * 1988-04-28 1989-10-24 Sunbeam Corporation Brush holder with plastic cup to retain biasing spring

Also Published As

Publication number Publication date
DE102017113911A1 (de) 2018-12-27
CN110462945A (zh) 2019-11-15
CN110462945B (zh) 2022-08-09
DE102017113911B4 (de) 2022-03-24
WO2018233749A1 (fr) 2018-12-27
EP3642910A1 (fr) 2020-04-29
EP3642910C0 (fr) 2023-11-08

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