DE102021210013A1 - Shaft grounding device for creating an electrically conductive connection between a rotatable shaft and a housing - Google Patents
Shaft grounding device for creating an electrically conductive connection between a rotatable shaft and a housing Download PDFInfo
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- DE102021210013A1 DE102021210013A1 DE102021210013.9A DE102021210013A DE102021210013A1 DE 102021210013 A1 DE102021210013 A1 DE 102021210013A1 DE 102021210013 A DE102021210013 A DE 102021210013A DE 102021210013 A1 DE102021210013 A1 DE 102021210013A1
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/54—Transmission for changing ratio
- B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
- B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2270/00—Problem solutions or means not otherwise provided for
- B60L2270/10—Emission reduction
- B60L2270/14—Emission reduction of noise
- B60L2270/147—Emission reduction of noise electro magnetic [EMI]
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- 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
- H01R39/12—Slip-rings using bearing or shaft surface as contact surface
-
- 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
- H01R39/46—Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
-
- 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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Wellenerdungseinrichtung (E) zur Herstellung einer elektrisch leitfähigen Verbindung zwischen einer Welle (W) und einem Gehäuse (GH), wobei die Wellenerdungseinrichtung (E) mehrere biege-elastische Kontaktelemente (EK) aufweist, welche einen Schleifkontakt (K1) zu einer Umfangsfläche der Welle (W) oder einer auf die Welle (W) aufgebrachten Hülse (H) bilden, wobei die Kontaktelemente (EK) derart angeordnet und ausgebildet sind, dass sie aufgrund ihrer eigenen Biege-Elastizität eine Vorspannung des Schleifkontakts (K1) bewirken, wobei die freien Enden (EKE) der Schleifkontakte (EK), welche den Schleifkontakt (K1) zur Welle (W) oder zur Hülse (H) bilden, im Neuzustand der Wellenerdungseinrichtung (E) derart abgeschrägt sind, dass eine wirksame Fläche des Schleifkontakts (K1) vergrößert ist; sowie Getriebe (G) oder elektrische Achsantriebs-Einheit (EA) für ein Kraftfahrzeug mit einer solchen Wellenerdungseinrichtung (E); sowie elektrische Maschine (EM2) mit einer solchen Wellenerdungseinrichtung (E).Shaft grounding device (E) for producing an electrically conductive connection between a shaft (W) and a housing (GH), the shaft grounding device (E) having a plurality of flexible contact elements (EK) which have a sliding contact (K1) with a peripheral surface of the shaft (W) or a sleeve (H) applied to the shaft (W), the contact elements (EK) being arranged and designed in such a way that they cause a preload on the sliding contact (K1) due to their own bending elasticity, the free Ends (EKE) of the sliding contacts (EK), which form the sliding contact (K1) to the shaft (W) or to the sleeve (H), when the shaft grounding device (E) is new are beveled in such a way that an effective surface of the sliding contact (K1) is enlarged is; and transmission (G) or electric axle drive unit (EA) for a motor vehicle with such a shaft grounding device (E); and electrical machine (EM2) with such a shaft grounding device (E).
Description
Die Erfindung betrifft eine Wellenerdungseinrichtung zur Herstellung einer elektrisch leitfähigen Verbindung zwischen einer drehbaren Welle und einem Gehäuse. Die Erfindung betrifft ferner ein Getriebe für ein Kraftfahrzeug mit einer solchen Wellenerdungseinrichtung, sowie eine elektrische Achsantriebs-Einheit für ein Kraftfahrzeug mit einer solchen Wellenerdungseinrichtung, sowie eine elektrische Maschine mit einer solchen Wellenerdungseinrichtung.The invention relates to a shaft grounding device for producing an electrically conductive connection between a rotatable shaft and a housing. The invention also relates to a transmission for a motor vehicle with such a shaft grounding device, and an electric axle drive unit for a motor vehicle with such a shaft grounding device, and an electric machine with such a shaft grounding device.
Die
Während des Betriebs des Wellenerdungsrings kommt es zu einem Verschleiß der Kontaktelemente, sodass die Kontaktelemente mit fortschreitender Betriebsdauer kürzer werden. Dadurch sinkt die Vorspannung des Schleifkontakts. Um über die Lebensdauer einen zuverlässigen elektrischen Kontakt zu gewährleisten, muss die initiale Vorspannung der Kontaktelemente entsprechend hoch gewählt werden.During operation of the shaft grounding ring, the contact elements wear out, so that the contact elements become shorter as the service life progresses. This reduces the preload of the sliding contact. In order to ensure reliable electrical contact over the service life, the initial preload of the contact elements must be chosen to be correspondingly high.
Werden die Kontaktelemente nun mit erhöhter Biegesteifigkeit ausgeführt, so verkleinert sich die Kontaktfläche im Neuzustand der Wellenerdungseinrichtung. Denn je steifer die Kontaktelemente sind, desto schlechter können sich die Kontaktelemente an die Welle anschmiegen. In der ersten Betriebsphase des Wellenerdungsrings tritt nun ein erhöhter Verschleiß auf, da die hohe Vorspannung auf eine relativ kleine Kontaktfläche wirkt. Dies ist unerwünscht, da der hohe Initialverschleiß die Lebensdauer der Kontaktelemente reduziert. Zudem nimmt die Vorspannung der Kontaktelemente in der ersten Betriebsphase stark ab. Die dadurch hervorgerufene NichtLinearität der Kontaktelement-Vorspannung kann die dauerhafte Zuverlässigkeit der elektrischen Kontaktierung beeinträchtigen.If the contact elements are designed with increased flexural rigidity, the contact surface is reduced when the shaft grounding device is new. Because the stiffer the contact elements are, the more difficult it is for the contact elements to cling to the shaft. In the first operating phase of the shaft grounding ring, increased wear occurs because the high preload acts on a relatively small contact area. This is undesirable since the high level of initial wear reduces the service life of the contact elements. In addition, the prestressing of the contact elements decreases greatly in the first phase of operation. The resulting non-linearity of the contact element bias can impair the long-term reliability of the electrical contact.
Die erhöhte Biegesteifigkeit der Kontaktelemente erschwert zudem das Abziehen der Wellenerdungseinrichtung von der Welle. Denn muss die Wellenerdungseinrichtung nach der Erstmontage wieder von der Welle abgenommen werden, so können sich die Kontaktelemente auf der Wellenoberfläche verkeilen. Dabei können die Kontaktelemente beschädigt werden.The increased flexural rigidity of the contact elements also makes it more difficult to remove the shaft grounding device from the shaft. If the shaft grounding device has to be removed from the shaft after initial assembly, the contact elements can become wedged on the shaft surface. This can damage the contact elements.
Es ist nun Aufgabe der Erfindung, eine Wellenerdung mit erhöhter Lebensdauer und verbesserten Demontageeigenschaften bereitzustellen.It is now the object of the invention to provide a shaft grounding with an increased service life and improved dismantling properties.
Die Aufgabe wird gelöst durch die Merkmale des Patentanspruchs 1. Vorteilhafte Ausgestaltungen ergeben sich aus den abhängigen Patentansprüchen, der Beschreibung sowie aus den Figuren.The object is achieved by the features of patent claim 1. Advantageous refinements result from the dependent patent claims, the description and the figures.
Zur Lösung der Aufgabe wird eine Wellenerdungseinrichtung zur Herstellung einer elektrisch leitfähigen Verbindung zwischen einer drehbaren Welle und einem Gehäuse vorgeschlagen. Die Wellenerdungseinrichtung ist mechanisch und elektrisch mit dem Gehäuse verbunden, und weist mehrere biege-elastische und elektrisch leitfähige Kontaktelemente auf. Die Kontaktelemente bilden einen Schleifkontakt zu einer Umfangsfläche der Welle oder einer auf die Welle aufgebrachten Hülse. Die Kontaktelemente sind derart angeordnet und ausgestaltet, dass sie aufgrund ihrer eigenen Biege-Elastizität eine Vorspannung des Schleifkontakts bewirken.To solve the problem, a shaft grounding device is proposed for producing an electrically conductive connection between a rotatable shaft and a housing. The shaft grounding device is mechanically and electrically connected to the housing and has a number of flexible and electrically conductive contact elements. The contact elements form a sliding contact with a circumferential surface of the shaft or a sleeve fitted to the shaft. The contact elements are arranged and designed in such a way that they bring about a prestressing of the sliding contact due to their own bending elasticity.
Erfindungsgemäß sind die freien Enden der Schleifkontakte, welche den Schleifkontakt zur Welle oder zur Hülse bilden, im Neuzustand der Wellenerdungseinrichtung derart abgeschrägt, dass eine wirksame Fläche des Schleifkontakts vergrößert ist. Durch diese Maßnahme wird der initiale Verschleiß der Kontaktelemente auf einfache Weise verringert, da die Flächenpressung des Schleifkontakts reduziert wird. Durch den geringeren initialen Verschleiß wird die Lebensdauer der Wellenerdungseinrichtung erhöht. Zudem erleichtert die Abschrägung der Kontaktelemente das Abziehen der Wellenerdungseinrichtung von der Welle, bzw. von der Hülse. According to the invention, the free ends of the sliding contacts, which form the sliding contact to the shaft or to the sleeve, are beveled when the shaft grounding device is new in such a way that an effective area of the sliding contact is enlarged. This measure reduces the initial wear of the contact elements in a simple manner, since the surface pressure of the sliding contact is reduced. Due to the lower initial wear, the service life of the shaft grounding device is increased. In addition, the chamfering of the contact elements makes it easier to remove the shaft grounding device from the shaft or from the sleeve.
Vorzugsweise erfolgt das Abschrägen der freien Ende der Schleifkontakte durch Prägen, durch Schneiden, durch Abschleifen oder durch Abstanzen. Die Erhöhung der Lebensdauer kann somit durch einfache mechanische Fertigungsmaßnahmen erfolgen.The free ends of the sliding contacts are preferably beveled by embossing, by cutting, by grinding or by punching. The service life can thus be increased by simple mechanical manufacturing measures.
Die vorgeschlagene Wellenerdungseinrichtung kann Bestandteil eines Getriebes für ein Kraftfahrzeug sein, beispielsweise ein Automatikgetriebe oder ein automatisiertes Getriebe mit mehreren Gangstufen. Die entsprechend geerdete Welle des Getriebes ist in einem Gehäuse des Getriebes drehbar gelagert, wobei ein Abschnitt der Welle aus dem Gehäuse hervorsteht. Der aus dem Gehäuse hervorstehende Wellenabschnitt kann Umwelteinflüssen wie Sand und Feuchtigkeit ausgesetzt sein. Die Welle kann beispielsweise eine Abtriebswelle des Getriebes sein. Das Getriebe kann eine elektrische Maschine aufweisen, welche zum Antrieb der Welle eingerichtet ist.The proposed shaft grounding device can be part of a transmission for a motor vehicle, for example an automatic transmission or an automated transmission with several gears. The appropriately grounded shaft of the gearbox is rotatably mounted in a housing of the gearbox, with a section of the shaft protruding from the housing. The shaft section protruding from the housing can be exposed to environmental influences such as sand and moisture. The shaft can be, for example, an output shaft of the transmission. The transmission can be electric Have machine, which is set up to drive the shaft.
Die vorgeschlagene Wellenerdungseinrichtung kann Bestandteil einer elektrischen Achsantriebs-Einheit für ein Kraftahrzeug sein. Die entsprechend geerdete Welle der elektrischen Achsantriebs-Einheit ist in einem Gehäuse der elektrischen Achsantriebs-Einheit drehbar gelagert, wobei ein Abschnitt der Welle aus dem Gehäuse hervorsteht. Der aus dem Gehäuse hervorstehende Wellenabschnitt kann Umwelteinflüssen wie Sand und Feuchtigkeit ausgesetzt sein.The proposed shaft grounding device can be part of an electric axle drive unit for a motor vehicle. The correspondingly grounded shaft of the electric final drive unit is rotatably mounted in a housing of the electric final drive unit, with a section of the shaft protruding from the housing. The shaft section protruding from the housing can be exposed to environmental influences such as sand and moisture.
Die vorgeschlagene Wellenerdungseinrichtung kann Bestandteil einer elektrischen Maschine mit einem drehfesten Stator und einem drehbar gelagerten Rotor sein. Der Rotor ist mit einer Rotorwelle gekoppelt. Die Rotorwelle ist durch die vorgeschlagene Wellenerdungseinrichtung gegenüber einem Gehäuse der elektrischen Maschine geerdet. Ein Abschnitt der Rotorwelle steht aus dem Gehäuse hervor.The proposed shaft grounding device can be part of an electrical machine with a non-rotatable stator and a rotatably mounted rotor. The rotor is coupled to a rotor shaft. The rotor shaft is grounded with respect to a housing of the electrical machine by the proposed shaft grounding device. A portion of the rotor shaft protrudes from the housing.
Ausführungsbeispiele der Erfindung sind anhand der Figuren detailliert beschrieben. Es zeigen:
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1 und2 je einen Antriebsstrang eines Kraftfahrzeugs; -
3 eine elektrische Maschine; -
4 und5 je eine Ansicht einer aus einem Gehäuse hervorragenden Welle; sowie -
6 eine Detailansicht einer Wellenerdungseinrichtung im Neuzustand.
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1 and2 one drive train each of a motor vehicle; -
3 an electric machine; -
4 and5 one view each of a shaft protruding from a housing; such as -
6 a detailed view of a shaft grounding device in new condition.
Die in
Durch den pulsartigen Betrieb der Leistungshalbleiter können elektromagnetische Störsignale entstehen, die beispielsweise im Antriebsstrang gemäß
Um den elektrisch leitfähigen Schleifkontakt K1 gegenüber der Umgebung U zu schützen ist ein Dichtring DX vorgesehen. Der Dichtring DX weist eine metallisches Strukturelement DX1 auf, welches von einem Elastomer DX2 umgeben ist. Der Dichtring DX ist auf einen Außendurchmesser des Halteelements EH aufgepresst. Der Dichtring DX bildet einen zweiten Schleifkontakt K2 zur Welle W. Im Gegensatz zum Radialwellendichtring DR weist der Dichtring DX keine Feder zur Vorspannung des Schleifkontakts K2 in Richtung der Welle W auf. Der Dichtring DX weist eine Lippe L1 und eine Lippe L2 auf. Der Schleifkontakt K2 des Dichtrings DX an der Welle W erfolgt nur über die Lippe L2, sodass zwischen der Welle W und der Lippe L1 ein Spalt besteht.In order to protect the electrically conductive sliding contact K1 from the environment U, a sealing ring DX is provided. The sealing ring DX has a metallic structural element DX1, which is surrounded by an elastomer DX2. The sealing ring DX is pressed onto an outside diameter of the holding element EH. The sealing ring DX forms a second sliding contact K2 on the shaft W. In contrast to the radial shaft sealing ring DR, the sealing ring DX does not have a spring to preload the sliding contact K2 in the direction of the shaft W. The seal ring DX has a lip L1 and a lip L2. The sliding contact K2 of the sealing ring DX on the shaft W is only via the lip L2, so that there is a gap between the shaft W and the lip L1.
Ein zusätzlicher Schutz des Schleifkontakts K1 erfolgt über die Dichtung DA, welche zwischen dem Gehäuse GH und dem Halteelement EH wirkt. Zur Aufnahme der Dichtung DA ist im Gehäuse GH eine entsprechende Nut vorgesehen.The sliding contact K1 is additionally protected by the seal DA, which acts between the housing GH and the holding element EH. A corresponding groove is provided in the housing GH to accommodate the seal DA.
Im Ausführungsbeispiel gemäß
BezugszeichenlisteReference List
- VMVM
- Verbrennungsmotorcombustion engine
- EXEX
- Elektrische Achsantriebs-EinheitElectric final drive unit
- GG
- Getriebetransmission
- GW1GW1
- Eingangswelleinput shaft
- GW2GW2
- Abtriebswelleoutput shaft
- RSRS
- Radsatzwheelset
- RS2RS2
- Reduktionsradsatzreduction gear set
- EMEM
- Elektrische Maschineelectrical machine
- INVINV
- Umrichterconverter
- BATBAT
- Batteriebattery
- AGInc
- Differentialgetriebedifferential gear
- DS1DS1
- Ausgangswelleoutput shaft
- DS2DS2
- Ausgangswelleoutput shaft
- DWDW
- Antriebsraddrive wheel
- GAGA
- GehäuseHousing
- EM2EM2
- Elektrische Maschineelectrical machine
- SS
- Statorstator
- RR
- Rotorrotor
- RWRW
- Rotorwellerotor shaft
- WL1WL1
- Lagerwarehouse
- WL2WL2
- Lagerwarehouse
- DR2DR2
- Dichtringsealing ring
- GEGE
- GehäuseHousing
- WW
- WelleWave
- HH
- Hülsesleeve
- HXHX
- Montageabschnittassembly section
- GHGH
- GehäuseHousing
- WLWL
- Lagerwarehouse
- DRDR
- RadialwellendichtringRadial shaft seal
- NRNO
- Ölraumoil room
- EE
- Wellenerdungseinrichtungshaft grounding device
- EKEK
- Kontaktelementcontact element
- EKEEKE
- Freies Ende des KontaktelementsFree end of the contact element
- ZZ
- Abschrägungbevel
- K1K1
- Erster SchleifkontaktFirst sliding contact
- EHeh
- Halteelementholding element
- EZsingle
- Klemmringclamping ring
- DATHERE
- Dichtungpoetry
- Uu
- Umgebungvicinity
- DXDX
- Dichtringsealing ring
- K2K2
- Zweiter SchleifkontaktSecond sliding contact
- DX1DX1
- Strukturelementstructural element
- DX2DX2
- Elastomerelastomer
- L1, L2L1, L2
- Lippelip
- Ff
- Fettfüllungfat filling
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED IN DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturPatent Literature Cited
- DE 102016010926 A1 [0002]DE 102016010926 A1 [0002]
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021201165 | 2021-02-09 | ||
DE102021201165.9 | 2021-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102021210013A1 true DE102021210013A1 (en) | 2022-08-11 |
Family
ID=82493291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102021210013.9A Pending DE102021210013A1 (en) | 2021-02-09 | 2021-09-10 | Shaft grounding device for creating an electrically conductive connection between a rotatable shaft and a housing |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102021210013A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US539454A (en) | 1895-05-21 | Carbon brush | ||
US3382387A (en) | 1968-05-07 | Gen Electric | Electrical current collection and delivery method and apparatus | |
JPH05174933A (en) | 1991-12-19 | 1993-07-13 | Tanaka Kikinzoku Kogyo Kk | Manufacture of slide contact |
DE102016010926A1 (en) | 2016-03-03 | 2017-09-07 | Kaco Gmbh + Co. Kg | Shaft grounding ring |
-
2021
- 2021-09-10 DE DE102021210013.9A patent/DE102021210013A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US539454A (en) | 1895-05-21 | Carbon brush | ||
US3382387A (en) | 1968-05-07 | Gen Electric | Electrical current collection and delivery method and apparatus | |
JPH05174933A (en) | 1991-12-19 | 1993-07-13 | Tanaka Kikinzoku Kogyo Kk | Manufacture of slide contact |
DE102016010926A1 (en) | 2016-03-03 | 2017-09-07 | Kaco Gmbh + Co. Kg | Shaft grounding ring |
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R163 | Identified publications notified |