EP1736621A1 - Slip ring assembly - Google Patents
Slip ring assembly Download PDFInfo
- Publication number
- EP1736621A1 EP1736621A1 EP05013639A EP05013639A EP1736621A1 EP 1736621 A1 EP1736621 A1 EP 1736621A1 EP 05013639 A EP05013639 A EP 05013639A EP 05013639 A EP05013639 A EP 05013639A EP 1736621 A1 EP1736621 A1 EP 1736621A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slip ring
- carrier according
- webs
- electrically conductive
- contact
- 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.)
- Withdrawn
Links
- 239000012811 non-conductive material Substances 0.000 claims description 5
- 238000007373 indentation Methods 0.000 abstract 2
- 230000008054 signal transmission Effects 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
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
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/06—Controlling mechanically-operated bolts by electro-magnetically-operated detents
- E05B47/0611—Cylinder locks with electromagnetic control
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
-
- 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
- H01R39/08—Slip-rings
-
- 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
- H01R39/64—Devices for uninterrupted current collection
Definitions
- the invention relates to a support for a contact element of a slip ring arrangement, in particular in a lock cylinder, with at least one slip ring on which at least one contact element is present.
- Slip ring assemblies are always needed when electrical power or electrical signals must be transmitted between components that rotate relative to each other. Frequently, the arrangement is such that an elastic spring contact abrading the slip ring, so that the electrical contact is effected. Slip rings are often a weak point, especially in the transmission of signals, since even minor contamination disturb the clean contact of the contact and thus hinder the signal transmission.
- a slip ring assembly for a lock cylinder in which a spring-mounted ball in a circumferential groove runs, in which the slip ring is arranged.
- the ball can be stored either in the lock core or in the lock cylinder housing. Again, there is a risk that contamination hinder the proper contact of the ball.
- the production and assembly and disassembly of the lock core is relatively complex, since the spring-mounted ball simultaneously how a locking element against axial withdrawal of the lock core acts.
- the invention has for its object to form a slip ring assembly with a support of the type described improved.
- the arrangement should be readily integrable in a lock cylinder.
- the carrier has on its side facing the slip ring two spaced webs which extend parallel to the slip ring axis in the mounted position and define therebetween a parallel to the slip ring axis extending recess formed by at least one electrically conductive element is spanned, which is attached to at least one web and rests in the mounted position on the slip ring.
- the electrically conductive element may, for example, be a wire which is secured at its opposite ends to the webs.
- the wires used are relatively thin and, for example, a cross section of 0.05 mm 2 to 0.1 m 2 . It is a fine bundle of wires formed, which rests like a brush on the slip ring. It causes a cleaning effect that keeps the electrical contact surfaces clean. The operational safety is further increased.
- the electrically conductive element may also be a leaf-shaped spring contact, which is at least attached to a web and is supported on the other web.
- the slip ring will resiliently press the spring contact into the recess without the free end slipping off the web. A secure concern is also ensured hereby.
- the spring contact can also be attached to both sides of the webs.
- the webs are preferably part of a frame or insert, which consists of a non-conductive material. This has the advantage that the contact elements can be mounted more easily. It may further be provided that in the recess below the electrically conductive element, an elastic electrically non-conductive material is present. Thus, the contact elements can be supported over a large area. It can for example be used a foam which is pressed in the mounted position of the slip ring.
- the webs are resiliently yielding. This allows the wires to be held under pretension. It is particularly advantageous if, in the mounted position, the circumference of the slip ring is partially immersed in the recess. Thus, a concern of the slip ring is achieved over a relatively large circle section.
- a slip ring assembly with such a support for the contact elements is relatively small, especially since the often bulky springs can be dispensed with.
- the slip ring can therefore be arranged on a locking core rotatable in the lock cylinder or a rotatable in the lock cylinder housing knob shaft of a shooting cylinder, the insert with at least one contact element in the cylinder sack of the lock cylinder housing can be mounted.
- the cylinder bag is easily accessible from its side facing away from the lock core or the knob shaft. Also, there is sufficient space for the wearer, and he can be easily replaced there in case of wear.
- a plurality of slip rings running parallel to each other in parallel may be present, which are separated from one another by circumferential projections. This has the advantage that the individual wire bundles are kept well in the track. Nevertheless, should a wire come loose, over-grip on an adjacent slip ring is prevented by the projection. The operation remains undisturbed.
- the carrier 11 shown in FIG. 1 for contact elements has two parallel webs 12 which between them a Limit depression 14. In the assembled position, the webs and the recess parallel to the axis of the slip ring.
- the carrier consists of an electrically non-conductive material, such as plastic.
- the recess 14 is spanned by wires 15 which are attached to the tops 16 of the webs 12, 13, for example, glued or clamped.
- wires 15 which are attached to the tops 16 of the webs 12, 13, for example, glued or clamped.
- a contact element 13 which bears against the slip ring.
- the illustrated carrier comprises three contact elements, as is often required in a combined power transmission and signal transmission.
- the circumference of the slip ring 17 extends at least partially in the recess 14. As a result, the wires are stretched and safely abut the slip ring.
- the webs 12 can be designed to be elastically yielding.
- the slip ring 17 is arranged on a knob shaft 18 or a lock core, which is or is rotatably mounted in a lock cylinder housing 19.
- the lock cylinder housing has for this purpose a cylindrical receptacle 20.
- the cylindrical receptacle is followed in the conventional profile cylinders to a cylinder bag 21, in which the carrier is mounted.
- the carrier 11 is held by a cap 22 on the lock cylinder housing.
- the carrier is substantially H-shaped, wherein on one side of the web 23, the recess 14 and on the other side of the web, a space 24 is formed for cable.
- Such an H-profile can be extruded. It then only has to be cut to length.
- the arrangement of only one contact element or two or up to any number of contact elements is possible with appropriate length of the carrier.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
Description
Die Erfindung betrifft einen Träger für ein Kontaktelement einer Schleifringanordnung, insbesondere in einem Schließzylinder, mit wenigstens einem Schleifring, an dem wenigstens ein Kontaktelement anliegt.The invention relates to a support for a contact element of a slip ring arrangement, in particular in a lock cylinder, with at least one slip ring on which at least one contact element is present.
Schleifringanordnungen werden stets dann benötigt, wenn elektrischer Strom oder elektrische Signale zwischen gegeneinander drehbaren Bauteilen übertragen werden müssen. Häufig ist die Anordnung so getroffen, dass ein elastischer Federkontakt schleifend an dem Schleifring anliegt, so dass der elektrische Kontakt bewirkt wird. Schleifringe stellen häufig einen Schwachpunkt insbesondere bei der Übertragung von Signalen dar, da bereits geringfügige Verschmutzungen das saubere Anliegen des Kontakts stören und somit die Signalübertragung behindern.Slip ring assemblies are always needed when electrical power or electrical signals must be transmitted between components that rotate relative to each other. Frequently, the arrangement is such that an elastic spring contact abrading the slip ring, so that the electrical contact is effected. Slip rings are often a weak point, especially in the transmission of signals, since even minor contamination disturb the clean contact of the contact and thus hinder the signal transmission.
Aus der
Der Erfindung liegt die Aufgabe zugrunde, eine Schleifringanordnung mit einem Träger der eingangs geschilderten Art verbessert auszubilden. Insbesondere soll die Anordnung ohne weiteres in einen Schließzylinder integrierbar sein.The invention has for its object to form a slip ring assembly with a support of the type described improved. In particular, the arrangement should be readily integrable in a lock cylinder.
Die Aufgabe wird gemäß der Erfindung dadurch gelöst, dass der Träger auf seiner dem Schleifring zugekehrten Seite zwei beabstandete Stege aufweist, die in der montierten Lage parallel zur Schleifringachse verlaufen und zwischen sich eine parallel zur Schleifringachse verlaufende Vertiefung begrenzen, die durch wenigstens ein elektrisch leitendes Element überspannt wird, das an wenigstens einem Steg befestigt ist und in der montierten Lage am Schleifring anliegt. Das elektrisch leitende Element kann beispielsweise ein Draht sein, der an seinen gegenüberliegenden Enden an den Stegen befestigt ist. Durch diese Maßnahme wird erreicht, dass der blanke Draht über einen Teilabschnitt seiner Länge am Umfang des Schleifrings anliegt. Durch die Überspannung der Vertiefung erhält der Draht eine gewisse Nachgiebigkeit, durch die ein einwandfreies Anliegen gewährleistet wird.The object is achieved according to the invention in that the carrier has on its side facing the slip ring two spaced webs which extend parallel to the slip ring axis in the mounted position and define therebetween a parallel to the slip ring axis extending recess formed by at least one electrically conductive element is spanned, which is attached to at least one web and rests in the mounted position on the slip ring. The electrically conductive element may, for example, be a wire which is secured at its opposite ends to the webs. By this measure it is achieved that the bare wire rests over a portion of its length on the circumference of the slip ring. Due to the over-tension of the recess of the wire receives a certain flexibility, which ensures a proper concern.
Es ist zweckmäßig, wenn mehrere Drähte parallel nebeneinander verlaufen und ein Kontaktelement bilden. Damit können auch höhere Ströme übertragen werden. Vor allem wird gewährleistet, dass stets wenigstens ein Draht am Schleifring anliegt, so dass der elektrische Kontakt aufrechterhalten bleibt.It is expedient if a plurality of wires run parallel next to one another and form a contact element. Thus, higher currents can be transmitted. Above all, it is ensured that always at least one wire is applied to the slip ring, so that the electrical contact is maintained.
Es ist günstig, wenn die verwendeten Drähte relativ dünn sind und beispielsweise einen Querschnitt von 0,05 mm2 bis 0,1 m2 aufweisen. Es wird ein feines Bündel der Drähte gebildet, das wie eine Bürste am Schleifring anliegt. Es wird ein Reinigungseffekt bewirkt, der die elektrischen Kontaktflächen sauber hält. Die Betriebsicherheit wird weiter erhöht.It is favorable if the wires used are relatively thin and, for example, a cross section of 0.05 mm 2 to 0.1 m 2 . It is a fine bundle of wires formed, which rests like a brush on the slip ring. It causes a cleaning effect that keeps the electrical contact surfaces clean. The operational safety is further increased.
Das elektrisch leitende Element kann aber auch ein blattförmiger Federkontakt sein, der zumindest an einem Steg befestigt ist und sich auf dem anderen Steg abstützt. Der Schleifring wird den Federkontakt elastisch in die Vertiefung drücken, ohne dass das freie Ende vom Steg rutscht. Ein sicheres Anliegen wird auch hierdurch gewährleistet. Der Federkontakt kann auch beidseitig an den Stegen befestigt sein.The electrically conductive element may also be a leaf-shaped spring contact, which is at least attached to a web and is supported on the other web. The slip ring will resiliently press the spring contact into the recess without the free end slipping off the web. A secure concern is also ensured hereby. The spring contact can also be attached to both sides of the webs.
Es können mehrere Kontaktelemente nebeneinander an den Stegen befestigt sein. Die Stege sind vorzugsweise Bestandteil eines Rahmens oder Einsatzes, der aus einem nicht leitenden Material besteht. Dies hat den Vorteil, dass die Kontaktelemente leichter montiert werden können. Es kann weiterhin vorgesehen werden, dass in der Vertiefung unterhalb des elektrisch leitenden Elements ein elastisches elektrisch nicht leitendes Material vorhanden ist. Damit können die Kontaktelemente großflächig abgestützt werden. Es kann beispielsweise ein Schaumstoff eingesetzt werden, der in der montierten Lage vom Schleifring eingedrückt wird.Several contact elements can be fastened next to one another on the webs. The webs are preferably part of a frame or insert, which consists of a non-conductive material. This has the advantage that the contact elements can be mounted more easily. It may further be provided that in the recess below the electrically conductive element, an elastic electrically non-conductive material is present. Thus, the contact elements can be supported over a large area. It can for example be used a foam which is pressed in the mounted position of the slip ring.
Es kann zudem vorgesehen werden, dass die Stege elastisch nachgebend sind. Dadurch können die Drähte unter Vorspannung gehalten werden. Es ist besonders günstig, wenn in der montierten Lage der Umfang des Schleifrings teilweise in die Vertiefung eintaucht. Damit wird ein Anliegen des Schleifrings über einen relativ großen Kreisabschnitt erreicht.It can also be provided that the webs are resiliently yielding. This allows the wires to be held under pretension. It is particularly advantageous if, in the mounted position, the circumference of the slip ring is partially immersed in the recess. Thus, a concern of the slip ring is achieved over a relatively large circle section.
Eine Schleifringanordnung mit einem derartigen Träger für die Kontaktelemente baut relativ klein, zumal auf die häufig sperrigen Federn verzichtet werden kann. Der Schleifring kann daher auf einem im Schließzylindergehäuse drehbaren Schließkern oder einer im Schließzylindergehäuse drehbaren Knaufwelle eines Schießzylinders angeordnet sein, wobei der Einsatz mit wenigstens einem Kontaktelement im Zylindersack des Schließzylindergehäuses montierbar ist. Der Zylindersack ist von seiner dem Schließkern oder der Knaufwelle abgekehrten Seite gut zugänglich. Auch ist dort ausreichend Raum für den Träger vorhanden, und er kann dort bei Verschleiß leicht ausgetauscht werden.A slip ring assembly with such a support for the contact elements is relatively small, especially since the often bulky springs can be dispensed with. The slip ring can therefore be arranged on a locking core rotatable in the lock cylinder or a rotatable in the lock cylinder housing knob shaft of a shooting cylinder, the insert with at least one contact element in the cylinder sack of the lock cylinder housing can be mounted. The cylinder bag is easily accessible from its side facing away from the lock core or the knob shaft. Also, there is sufficient space for the wearer, and he can be easily replaced there in case of wear.
Es können bei mehreren Kontaktelementen entsprechend mehrere parallel nebeneinander verlaufende Schleifringe vorhanden sein, die durch umlaufende Vorsprünge voneinander getrennt sind. Dies hat den Vorteil, dass die einzelnen Drahtbündel gut in der Spur gehalten werden. Sollte sich dennoch ein Draht lösen, wird ein Übergreifen auf einen benachbarten Schleifring durch den Vorsprung verhindert. Der Betrieb bleibt ungestört.In the case of several contact elements, a plurality of slip rings running parallel to each other in parallel may be present, which are separated from one another by circumferential projections. This has the advantage that the individual wire bundles are kept well in the track. Nevertheless, should a wire come loose, over-grip on an adjacent slip ring is prevented by the projection. The operation remains undisturbed.
Die Erfindung wird im Folgenden anhand der schematischen Zeichnung näher erläutert. Es zeigen:
- Fig. 1
- den Träger für die Kontaktelemente in perspektivischer Darstellung und
- Fig. 2
- im Schnitt einen Schließzylinder mit montiertem Träger.
- Fig. 1
- the carrier for the contact elements in a perspective view and
- Fig. 2
- on average, a lock cylinder with mounted support.
Der in Fig. 1 gezeigte Träger 11 für Kontaktelemente weist zwei parallele Stege 12 auf, die zwischen sich eine Vertiefung 14 begrenzen. In der montierten Lage verlaufen die Stege und die Vertiefung parallel zur Achse des Schleifrings. Der Träger besteht aus einem elektrisch nicht leitenden Material, beispielsweise aus Kunststoff.The
Die Vertiefung 14 wird von Drähten 15 überspannt, die an den Oberseiten 16 der Stege 12, 13 befestigt, beispielsweise geklebt oder geklemmt sind. Bei dem in der Zeichnung dargestellten Ausführungsbeispiel bildet ein Bündel von parallelen Drähten ein Kontaktelement 13, das am Schleifring anliegt. Der dargestellte Träger umfasst drei Kontaktelemente, wie es bei einer kombinierten Energieübertragung und Signalübertragung häufig erforderlich ist.The
In der eingebauten Lage gemäß Fig. 2 verläuft der Umfang des Schleifrings 17 zumindest teilweise in der Vertiefung 14. Dadurch werden die Drähte gespannt und liegen sicher an dem Schleifring an. Die Stege 12 können dazu elastisch nachgiebig ausgebildet sein.In the installed position shown in FIG. 2, the circumference of the
Der Schleifring 17 ist auf einer Knaufwelle 18 oder einem Schließkern angeordnet, die beziehungsweise der in einem Schließzylindergehäuse 19 drehbar gelagert ist. Das Schließzylindergehäuse weist hierzu eine zylindrische Aufnahme 20 auf. An die zylindrische Aufnahme schließt sich bei den herkömmlichen Profilzylindern ein Zylindersack 21 an, in den der Träger montiert ist. Bei dem in der Zeichnung dargestellten Ausführungsbeispiel wird der Träger 11 über eine Kappe 22 am Schließzylindergehäuse gehalten.The
Die Montage eines solchen Trägers ist sehr einfach bei bereits montierter Knaufwelle oder montiertem Schließkern möglich. Auch die Herstellung des Trägers mit den Kontaktelementen ist mit einfachen Mitteln möglich. Wie insbesondere aus Fig. 1 ersichtlich, ist der Träger im Wesentlichen H-förmig ausgebildet, wobei auf der eine Seite des Stegs 23 die Vertiefung 14 und auf der anderen Seite des Stegs ein Raum 24 für Kabel gebildet wird. Ein solches H-Profil kann stranggepresst werden. Es muss anschließend nur noch auf Länge geschnitten werden. Die Anordnung von nur einem Kontaktelement oder zwei oder bis zu beliebig vielen Kontaktelementen ist bei entsprechender Länge des Trägers möglich.The installation of such a carrier is very easy with already mounted knob shaft or assembled lock core possible. Also the production of the carrier with the Contact elements is possible with simple means. As can be seen in particular from Fig. 1, the carrier is substantially H-shaped, wherein on one side of the
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05013639A EP1736621A1 (en) | 2005-06-24 | 2005-06-24 | Slip ring assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05013639A EP1736621A1 (en) | 2005-06-24 | 2005-06-24 | Slip ring assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1736621A1 true EP1736621A1 (en) | 2006-12-27 |
Family
ID=35355891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05013639A Withdrawn EP1736621A1 (en) | 2005-06-24 | 2005-06-24 | Slip ring assembly |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1736621A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016165973A1 (en) * | 2015-04-13 | 2016-10-20 | Schunk Bahn- Und Industrietechnik Gmbh | Discharge device |
CN108233133A (en) * | 2017-12-31 | 2018-06-29 | 扬州海通电子科技有限公司 | Modular contact component and the large-scale power transmission sliding ring contact making device based on the component |
EP2587643B1 (en) * | 2011-10-19 | 2020-03-11 | Schunk Transit Systems GmbH | Discharge device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4143929A (en) * | 1976-04-29 | 1979-03-13 | Messer Griesheim Gmbh | Current collector |
US4924686A (en) * | 1987-02-09 | 1990-05-15 | R. Berchtold Ag | Contact device for transmitting electrical signals between a lock and key in a cylinder lock |
US5865629A (en) * | 1997-06-30 | 1999-02-02 | Litton Systems, Inc. | Pick-up elements for slip rings or rotary connectors |
US6412321B1 (en) * | 1999-07-27 | 2002-07-02 | Talleres De Escoriaza, S.A. (Tesa) | Locking cylinder |
DE10111403A1 (en) * | 2001-03-09 | 2002-09-26 | Dietrich G Gmbh | Pick up contact for slip rings uses a number of parallel wires that contact ring |
-
2005
- 2005-06-24 EP EP05013639A patent/EP1736621A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4143929A (en) * | 1976-04-29 | 1979-03-13 | Messer Griesheim Gmbh | Current collector |
US4924686A (en) * | 1987-02-09 | 1990-05-15 | R. Berchtold Ag | Contact device for transmitting electrical signals between a lock and key in a cylinder lock |
US5865629A (en) * | 1997-06-30 | 1999-02-02 | Litton Systems, Inc. | Pick-up elements for slip rings or rotary connectors |
US6412321B1 (en) * | 1999-07-27 | 2002-07-02 | Talleres De Escoriaza, S.A. (Tesa) | Locking cylinder |
DE10111403A1 (en) * | 2001-03-09 | 2002-09-26 | Dietrich G Gmbh | Pick up contact for slip rings uses a number of parallel wires that contact ring |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2587643B1 (en) * | 2011-10-19 | 2020-03-11 | Schunk Transit Systems GmbH | Discharge device |
WO2016165973A1 (en) * | 2015-04-13 | 2016-10-20 | Schunk Bahn- Und Industrietechnik Gmbh | Discharge device |
CN107534254A (en) * | 2015-04-13 | 2018-01-02 | 申克铁路和医疗***有限责任公司 | Electric discharge device |
US10819195B2 (en) | 2015-04-13 | 2020-10-27 | Schunk Transit Systems Gmbh | Discharge device |
CN107534254B (en) * | 2015-04-13 | 2020-11-27 | 申克运输***有限责任公司 | Discharge device |
CN108233133A (en) * | 2017-12-31 | 2018-06-29 | 扬州海通电子科技有限公司 | Modular contact component and the large-scale power transmission sliding ring contact making device based on the component |
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