EP3642910A1 - Erdungskontakt - Google Patents
ErdungskontaktInfo
- Publication number
- EP3642910A1 EP3642910A1 EP18722385.4A EP18722385A EP3642910A1 EP 3642910 A1 EP3642910 A1 EP 3642910A1 EP 18722385 A EP18722385 A EP 18722385A EP 3642910 A1 EP3642910 A1 EP 3642910A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brush
- brush shaft
- base plate
- shaft
- contact according
- 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
Links
- 210000002105 tongue Anatomy 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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 electric current according to the features of patent claim 1.
- a grounding contact is a low-resistance bridge that protects the critical points of a component from being damaged by high currents.
- ground contacts conduct current around critical locations, such Wheel bearing around.
- a holding device for brushes which form on rail vehicles a reverse current and / or ground contact between relatively moving parts.
- 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 integrally into a base plate.
- the base plate with the brush shaft is a cast component.
- the production of such a brush holder is complicated, inter alia, because of the inner contour of the brush shaft.
- the cast brush shaft must be cleared with a relatively high volume of machining. The tools are expensive.
- Another disadvantage is that the brush shafts are not subject to standardization and thus the dimensions of the brush shafts can vary.
- the invention has for its object to show a grounding contact with a compact and robust brush holder, which is inexpensive and easy to manufacture and suitable for standardization.
- the invention relates to a ground contact for the controlled steering of electric current. It comprises a brush holder with a base plate and with at least one brush shaft for receiving a brush. The at least one brush shaft is positively connected to the base plate.
- the advantage of the earth contact according to the invention is the modular design with respect to the brush shaft.
- the base plate and the brush shaft can be manufactured separately from one another by laser and water jet cutting methods. Modeling and tooling costs for the mold during the casting process are eliminated. Machining with a laser and water jet process leads to a lower cutting volume. It does not have to be cleared the entire brush shaft chipping. Due to the modular construction principle
- the brush holder can improve the flexibility of the manufacturing process and reduce manufacturing times. According to the invention, it is possible by the modular design principle of the brush holder to standardize the brush shaft regardless of the design of the base plate and produce as a mass product.
- the invention provides to carry out the brush shaft as a standard component for the current brushes with the dimensions 40 x 20 mm or 32 x 12.5 mm. Standardized brush ducts of other dimensions can also be used in the invention.
- the brushes are preferably metal graphite brushes, which are also referred to as carbon brushes. However, the brushes may be made of other metals or metal alloys of high electrical conductivity, e.g. Copper, silver or molybdenum included.
- the grounding contact has contact means in the form of strands, which are connectable to the base plate and conduct the electrical current to the brush.
- the strands are flexible and allow the tracking of the brush under the influence of a spring force.
- the connection between the base plate and the strands takes place via tubular cable lugs on the strands, which are screwed electrically conductively above it with the base plate.
- the base plate has at least one brush shaft receptacle for receiving the at least one brush shaft. Due to the positive connection of the base plate with the brush shaft, a simple assembly and, if necessary, a simple replacement of the brush shaft is possible, e.g. if the brush shaft should be damaged or worn.
- the positive connection is detachable.
- the supporting base plate is preferably a flat plate of an electrically conductive material, in particular metal.
- the clamping tongues preferably have at their free ends hooks which engage behind an edge of the brush shaft receptacle in the base plate.
- the clamping tongues are arranged on at least three sides of the brush shaft. Since the brushes are substantially rectangular, and the brush shaft has a substantially rectangular cross-section. Ideal is a diametrical arrangement of clamping tongues. An arrangement of three clamping tongues allows a sufficient fixation of the brush shaft.
- a positive connection with clamping tongues has the advantage that a connection between the base plate and the brush shaft without further fastening means, such as screws, pins or rivets is possible and the use of tools thereby eliminated. This facilitates the assembly.
- the clamping force of the clamping tongues is chosen so large that they must not be secured by additional securing means against spring back.
- the brush shaft preferably has a support surface for support on the underside support on the base plate.
- the support surface is preferably adjacent to the fixed ends of the clamping tongues. As a result, the brush shaft is held clamped in the direction perpendicular to the base plate.
- the brush shaft passes through the brush shaft receptacle completely.
- the clamping tongues or hooks project beyond the base plate.
- the brush shaft is securely fixed and it ensures a correct guidance of the brush.
- the base plate may have a corresponding number of brush shaft receptacles for a plurality of brushes. As a result, larger currents can be transmitted. Operational safety is also increased.
- the base plate on three brush shaft receptacles.
- the individual brush shafts can preferably be manufactured separately. It is also possible to manufacture a plurality of brush shafts as a common component, which is then connected to the base plate.
- a spring element is provided, which is preferably designed as a roller belt spring. The spring element has the task of exerting a spring force on the brush, so that the brush is constantly applied for power transmission to an abrasive body.
- the spring element is mounted 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. There are no forces introduced into the base plate.
- the brush shaft including the spring holder and the spring element form an independent assembly, which is provided for coupling to the base plate.
- the brush shaft is made electrically conductive.
- the brushes are connected to the base plate via the current leads.
- the brush shaft can therefore consist of electrically non-conductive material, in particular of a plastic material. This has the advantage that the entire grounding contact is easier and cheaper to manufacture.
- the brush shaft is inexpensive to produce, in particular 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 ground contact preferably has a cover which protects the brush with electrical connections, contacts and strands.
- the lid is non-positively and / or positively fastened to the base plate, for example by means of screws.
- Figure 1 is a side view of a known from the prior art brush holder
- Figure 2 is a plan view of a brush holder according to Figure 1;
- Figure 3 and 4 is a perspective view of an inventive
- Figure 5 is a plan view of an inventive
- Figure 6 is an axial section of an inventive
- Figure 7 is a sectional view of an inventive
- Figure 8 is a plan view of an inventive
- FIGS 1 and 2 show a brush holder 2, as it 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 integrally formed and material uniform.
- the illustrated brush shaft 4 serves to receive a brush, not shown.
- FIGS. 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 5.
- the base plate 3 and the brush shaft 4 are not integrally formed according to the invention.
- the base plate 3 has a brush shaft receptacle 5, in which the brush shaft 4 is inserted.
- the outer contour of the brush shaft 4 corresponds to the contour of the brush shaft receptacle 5 in the base plate 3, so that a snug fit of the brush shaft 4 within the brush shaft receptacle 5 of the base plate 3 is ensured.
- a lying above the base plate 3 area is protected by a cover 7 which is fixed by screws to the base plate 3.
- FIG. 6 shows that the brush 6 protrudes with one end of the brush shaft 4. This one end of the brush 6 is in contact with a non-illustrated component (slip ring) to dissipate electrical current through this component.
- FIG. 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.
- FIG. 5 shows the earth contact 1 according to the invention of FIGS. 3 and 4 in a plan view without a cover 7.
- the base plate 3 has a rectangular shape.
- the brush shaft receptacle 5 is arranged for receiving the brush shaft 4.
- the brush 6 is arranged.
- Electrical contact means 8 in the form of flexible strands are connected via two terminals 9 to the base plate 3 of the grounding contact 1 and provide the current-conducting connection between the base plate 3 and the brush 6 forth.
- the brush 6 two contact means 8 (strands), wherein the cable lugs 9 are fastened with screws to the base plate 3.
- receptacles for pipe lugs 10 are provided which are also secured by screws to the base plate 3.
- the electric power is supplied via the screwed pipe lugs 10 of the base plate 3 for forwarding.
- FIG. 6 shows a section along the line A - A according to FIG. 5.
- the grounding contact 1 is closed by 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 passes through the brush shaft receptacle 5 completely.
- the brush shaft 4 is clamped by clamping tongues 1 1 on the base plate 3 ( Figures 6 and 7).
- the clamping tongues 1 1 hooks 17 which engage 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 fixed.
- the underside of the base plate 3 is the side of the base plate 3 opposite the top side.
- the terms top side and bottom side or top and bottom are not restrictive for the installation position of the grounding contact 1.
- the brush shaft 4 has a supporting surface 13 for the underside support of the base plate 3. It consists essentially of a projection or a recess in the brush shaft 4, which together with the hook 17 of the clamping tongue 1 1 is a positive connection for receiving the base plate 3 ( Figure 7).
- FIG. 7 shows a further sectional illustration of the earthing contact 1 according to FIG. 5 with cover 7.
- FIG. 7 shows a spring holder 14 for receiving a spring element 15.
- the spring holder 14 is connected in a form-fitting manner to the brush shaft 4.
- the spring holder 14 passes through together with the spring element 15 and the brush shaft 4, the brush shaft receptacle 5.
- the spring element 15 is a roller belt spring which presses from the top of the brush 6.
- one end of the brush 6 abuts against a rotating component, not shown, so that the brush 6 wears off.
- the brush 6 is slidably mounted in the brush shaft 4, wherein the force exerted by the spring element force pushes the brush 6 against the rotating member.
- FIG. 8 shows a plan view of a grounding contact 1 according to the invention with a plurality of brush shafts 4 and brushes 5.
- the base plate 3 has a substantially round or pan-shaped form, 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 are opposite each other, wherein a third brush shaft receptacle 5 is arranged laterally of the first two brush shaft receptacles 5. Also in this embodiment enforce the brush shafts 4 as separate components the brush shaft receptacles 5 of the base plate 3 and are connected to this via clamping tongues 1 1 form-fitting and clamping.
- brushes 6 are each arranged with, which are connected via the said contact means 8 and by means of the terminals 9 to the base plate 3.
- FIG. 9 shows the section BB through FIG. 8.
- FIG. 9 shows the spring element 15 in the form of a roller-band spring, which urges the respective brush 6 against a relatively movable component 18 (slip ring) for current transmission. Furthermore, FIG. 9 shows that the earthing contact 1 with its brush shafts 4 passes through a holder 19. The holder 19 extends essentially parallel to the base plate 3.
Landscapes
- Motor Or Generator Current Collectors (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
Description
Claims
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 (de) | 2017-06-23 | 2018-04-19 | Erdungskontakt |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3642910A1 true EP3642910A1 (de) | 2020-04-29 |
EP3642910C0 EP3642910C0 (de) | 2023-11-08 |
EP3642910B1 EP3642910B1 (de) | 2023-11-08 |
Family
ID=62116157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18722385.4A Active EP3642910B1 (de) | 2017-06-23 | 2018-04-19 | Erdungskontakt |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3642910B1 (de) |
CN (1) | CN110462945B (de) |
DE (1) | DE102017113911B4 (de) |
WO (1) | WO2018233749A1 (de) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL91577C (de) | 1956-01-02 | 1959-02-16 | ||
US3431446A (en) | 1967-07-25 | 1969-03-04 | Rae Motor Corp | Electric motor brush holder,cap and spring |
IT1021354B (it) | 1974-09-13 | 1978-01-30 | Itw Fastex Italia Spa | Porta spazzole per motori a corrente continua |
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 (de) * | 1987-05-29 | 1992-11-12 | ||
US4876475A (en) | 1988-04-28 | 1989-10-24 | Sunbeam Corporation | Brush holder with plastic cup to retain biasing spring |
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 |
CN1046603C (zh) * | 1994-04-28 | 1999-11-17 | 西门子加拿大有限公司 | 电刷支架组件 |
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 |
EP2748049A1 (de) * | 2011-08-26 | 2014-07-02 | Aktiebolaget SKF | Anordnung mit rotierenden teilen mit leiterflüssigkeit für erdrückleitung |
CN203119260U (zh) * | 2012-12-07 | 2013-08-07 | 谢佐凌 | 一种碳刷架 |
-
2017
- 2017-06-23 DE DE102017113911.7A patent/DE102017113911B4/de active Active
-
2018
- 2018-04-19 CN CN201880021331.XA patent/CN110462945B/zh active Active
- 2018-04-19 WO PCT/DE2018/100374 patent/WO2018233749A1/de active Application Filing
- 2018-04-19 EP EP18722385.4A patent/EP3642910B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
WO2018233749A1 (de) | 2018-12-27 |
EP3642910C0 (de) | 2023-11-08 |
CN110462945A (zh) | 2019-11-15 |
DE102017113911A1 (de) | 2018-12-27 |
CN110462945B (zh) | 2022-08-09 |
DE102017113911B4 (de) | 2022-03-24 |
EP3642910B1 (de) | 2023-11-08 |
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