EP3249662B1 - Electric pump motor - Google Patents

Electric pump motor Download PDF

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Publication number
EP3249662B1
EP3249662B1 EP17165112.8A EP17165112A EP3249662B1 EP 3249662 B1 EP3249662 B1 EP 3249662B1 EP 17165112 A EP17165112 A EP 17165112A EP 3249662 B1 EP3249662 B1 EP 3249662B1
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EP
European Patent Office
Prior art keywords
connection
wire
pump motor
connecting element
electric pump
Prior art date
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Active
Application number
EP17165112.8A
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German (de)
French (fr)
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EP3249662A1 (en
Inventor
Raphael Tobias Kubiak
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.)
Hanning Elektro Werke GmbH and Co KG
Original Assignee
Hanning Elektro Werke GmbH and Co KG
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Application filed by Hanning Elektro Werke GmbH and Co KG filed Critical Hanning Elektro Werke GmbH and Co KG
Priority to PL17165112T priority Critical patent/PL3249662T3/en
Publication of EP3249662A1 publication Critical patent/EP3249662A1/en
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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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H01R4/723—Making a soldered electrical connection simultaneously with the heat shrinking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/023—Alloys based on aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
    • H01B3/305—Polyamides or polyesteramides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H01R4/625—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0207—Ultrasonic-, H.F.-, cold- or impact welding

Definitions

  • the invention relates to an electric pump motor, which has a connection arrangement with a wire and a connection body.
  • connection body Various contacting methods are known from the prior art in order to connect a wire, for example an aluminum wire used as a winding for an electric motor, to the connection body and to protect the connection point formed between the wire and the connection body.
  • the connection is made in an industrial environment, for example by soldering or welding or ultrasonic bonding. It is also known to use an insulation displacement technique for connecting the wire to the connection body.
  • connection point between the wire and the connector body forms a weak point that needs to be protected.
  • it is known to encapsulate it with thermoplastic or thermoset materials, to cast it with epoxy or a similar material, or to apply a layer of lacquer.
  • thermoplastic or thermoset materials to cast it with epoxy or a similar material, or to apply a layer of lacquer.
  • CN 204 741 344 U known to protect the grease or other lubricant To bring the connection point onto this.
  • the materials used here are hydrocarbons thickened with silicon oxide, polydimethylsiloxane or a classic silicone.
  • the US 2015/111442 A1 describes a welding process for a multi-core cable, which is applied to a connector body and then sheathed. Such arrangements for multi-core cables are also from the JP 2015 118826 A and the JP 2015 026429 A known.
  • CN 203 953 323 U discloses an electromagnetic jig with a connection arrangement with a contact pin.
  • the object of the invention is to provide an electric pump motor in which the connection point formed between the wire and the connection body can be produced particularly economically and is advantageously protected against damaging environmental influences.
  • the invention has the features of claim 1.
  • the wire is firmly bonded to the connector body. After the connection has been made, the shrink tube with the inner adhesive is placed over the connection point.
  • the shrink tube is heated after the covering has been produced.
  • part of the thermoplastic inner adhesive can pass through a gap which is formed between the connection body and the shrink tube.
  • connection point is excellently electrically insulated by the inner adhesive and the shrink tube.
  • connection point and the part of the wire covered by the sheath are protected against corrosion.
  • the shrink tube with the inner adhesive prevents contact with oxygen or water.
  • the shrink tube is also resistant to aging.
  • the internal adhesive and the material properties of the shrink tube prevent tension cracks or minimize the tendency to become brittle.
  • the connection point is resistant to aggressive media such as oil, acid, alkali or salts.
  • good temperature resistance is guaranteed in the normal operating temperature ranges of an aluminum winding for coil formers.
  • there is no risk of the shrink tube melting since it no longer flows at temperatures above the crystalline melting point, but becomes elastic like an elastomer.
  • the good insulation also means that the wire, if it is designed as enamelled aluminum wire, no longer requires an additional insulation layer or additional insulation protection.
  • the shrinked hose, with which the connection point is encased promotes an even and permanent application of force to the connection points. It represents an additional mechanical security and ensures a permanently good connection.
  • the investment costs in plant technology are low economically.
  • the connection process is suitable for large series and easy to control. The cycle times are low.
  • the wire is bonded to the connection body.
  • a bond machine is used to manufacture the bond site.
  • the wire is pressed against the connection body by a tool of the automatic bonding machine and excited by the tool to ultrasonic vibrations.
  • connection points are formed.
  • the at least two and preferably all connection points are produced on the same side of the connection body.
  • the bonding of wire and connection body can advantageously produce a material connection with a low electrical contact resistance.
  • the reliability of the electrical connection improves when two or more connection points between the wire and the connector body.
  • the two or more points are produced in an economically advantageous manner on a common side of the connection body, since repositioning of the connection body and / or the wire can be avoided when the connection is made.
  • connection body can provide guide means for the wire.
  • guide recesses for the wire can be provided on the connection body.
  • the geometry of the area to be insulated i.e. the geometry of the connector body and the connection point, must be taken into account and the quality requirements for the product must be taken into account.
  • the continuous operating temperature of the shrink tube and the winding formed by the wire must be taken into account.
  • Another important parameter is the volume to be protected, which the inner adhesive must seal. This must also be taken into account when selecting the shrink tube.
  • the use of the shrink tube with the inner adhesive is very advantageous in terms of process technology, since the inner adhesive and the shrink tube can be applied in a common process step.
  • a thermoplastic inner adhesive and in particular an inner adhesive based on polyamide can be used as the inner adhesive.
  • an ethylene-vinyl acetate copolymer (elastomer adhesive) can be used as an internal adhesive.
  • a melting point of the same in the range of approximately 135 ° C. can be provided.
  • connection arrangement comprises a connection body and a wire which is fixed to the connection body at a connection point in at least one connection point, as well as a sheath for the connection point.
  • the sheath has a thermoplastic inner adhesive encompassing the wire and the connection body in the area of the connection point and a shrink tube likewise encompassing the wire and the connection body in the area of the connection point.
  • a flat plug of a coil former serves as a connection body.
  • the inner adhesive is preferably designed as an elastomer adhesive or thermoplastic inner adhesive and is provided between the connection body and the shrink tube.
  • the wire and the connecting body are integrally connected to one another at at least two points.
  • the two points are provided on a common side of the connection body and preferably on a common flat side of the flat plug serving as the connection body.
  • pump motors according to the invention have a named connection arrangement in order to firmly attach a wire of the windings to a connection body of the motor.
  • the integral connection between the wire and the connection body is produced according to the invention by ultrasonic wire bonding.
  • connection arrangement for an electric pump motor according to the invention, which provides two connection bodies 4, which are made in the manner of a flat plug from an electrically conductive material.
  • a wire 1 is also provided, which on the one hand forms a winding 10 and on the other hand is fixed to the connection bodies 4 in two points 2, 3.
  • the connection points 2, 3 designed for the cohesive, electrically conductive connection of the wire 1 to the connection body 4 are produced in the present exemplary embodiment of the invention by means of an ultrasonic wire bonding machine. It is the case here that the wire 1 is pressed against the connection body 4 by a tool of the automatic bonding machine and that the tool is excited to produce ultrasonic vibrations. Due to the ultrasonic vibrations, the wire 1 is connected to the connector body 4 in a cohesive manner.
  • a determination of the wire 1 on the connector body 4 according to Fig. 1 is achieved in particular before the bond connection is established by winding the wire 1 around the connection body 4 and positioning it in the region of two guide recesses 9 which are formed on two opposite narrow sides of the flat plug 4.
  • the connection points 2, 3 are provided on between the guide recesses 9 on the same flat side of the connection body 4.
  • a shrink tube 6 with a thermoplastic inner adhesive 7 is applied in the area of the connection point comprising points 2, 3, which electrically insulates and encapsulates the connection point (cf. Fig. 2 ).
  • the shrink tube 6 encompasses the connecting body 4 with the wire 1 and the thermoplastic inner adhesive 7.
  • the shrink tube 6 is heated after the covering has been produced. In the area of a gap formed between the connector body 4 on the one hand and the shrink tube 6 on the other hand, part of the thermoplastic inner adhesive 7 emerges (not shown).
  • connection bodies 4 are used for contacting the windings 10 carried by a coil body 5.
  • a further connection body 8 is provided, which is not electrically contacted and remains inoperative in the embodiment shown.
  • connection bodies 4 are modified in such a way that the connection bodies 4 designed as flat plugs are provided in the same orientation, whereas in the first exemplary embodiment of the invention, the connection bodies 4 have an orientation that is rotated by 90 ° to one another.
  • An elastomer adhesive can be provided as the internal adhesive, and in particular an internal adhesive based on ethylene-vinyl acetate (ethylene-vinyl acetate copolymer).
  • the invention is not limited to the embodiment variant shown here.
  • the connector body 4 can have a different geometry.

Description

Die Erfindung betrifft einen elektrischen Pumpenmotor, der eine Verbindungsanordnung mit einem Draht und einem Anschlusskörper aufweist.The invention relates to an electric pump motor, which has a connection arrangement with a wire and a connection body.

Aus dem Stand der Technik sind unterschiedliche Kontaktierungsmethoden bekannt, um einen Draht, beispielsweise einen als Wicklung für einen Elektromotor genutzten Aluminiumdraht, mit dem Anschlusskörper zu verbinden und die zwischen dem Draht und dem Anschlusskörper gebildete Verbindungsstelle zu schützen. Die Verbindung wird im industriellen Umfeld beispielsweise durch Löten oder Schweißen oder Ultraschallbonden hergestellt. Ebenso ist bekannt, eine Schneidklemmtechnik zum Verbinden des Drahts mit dem Anschlusskörper zu verwenden.Various contacting methods are known from the prior art in order to connect a wire, for example an aluminum wire used as a winding for an electric motor, to the connection body and to protect the connection point formed between the wire and the connection body. The connection is made in an industrial environment, for example by soldering or welding or ultrasonic bonding. It is also known to use an insulation displacement technique for connecting the wire to the connection body.

Typischerweise bildet die Verbindungsstelle zwischen dem Draht und dem Anschlusskörper eine Schwachstelle, die es zu schützen gilt. Zum Schutz der Verbindungsstelle ist es insofern bekannt, sie mit thermoplastischen oder duroplastischen Materialien zu umspritzen, sie mit Epoxy oder einem ähnlichen Material zu vergießen oder eine Lackschicht aufzubringen. Ebenso ist aus der CN 204 741 344 U bekannt, ein Fett oder einen anderen Schmierstoff zum Schutz der Verbindungsstelle auf ebendiese aufzubringen. Als Werkstoff kommen hier mit Siliziumoxid verdickte Kohlenwasserstoffe, Polydimethylsiloxan oder ein klassisches Silikon zur Anwendung.Typically, the connection point between the wire and the connector body forms a weak point that needs to be protected. To protect the connection point, it is known to encapsulate it with thermoplastic or thermoset materials, to cast it with epoxy or a similar material, or to apply a layer of lacquer. Likewise, from the CN 204 741 344 U known to protect the grease or other lubricant To bring the connection point onto this. The materials used here are hydrocarbons thickened with silicon oxide, polydimethylsiloxane or a classic silicone.

Auch wenn sich die bekannten Methoden zur Herstellung einer Umhüllung für die Verbindungsstelle in der Praxis grundsätzlich bewährt haben, besteht insbesondere aufgrund der stetig wachsenden Qualitätsstandards und neuer Prüfroutinen (zum Beispiels Salzsprühnebeltests) das Bestreben, die Kontaktierungsmethoden weiter zu verbessern und den Schutz der Verbindungsstelle zu optimieren.Even though the known methods for producing a sheath for the connection point have proven themselves in practice, there is an endeavor in particular to improve the contacting methods and to optimize the protection of the connection point, in particular due to the constantly increasing quality standards and new test routines (e.g. salt spray tests) .

Aus der DE 198 52 929 C1 ist ein gattungsgemäßer elektrischer Pumpenmotor mit einer konventionellen Kupferwicklung bekannt.From the DE 198 52 929 C1 a generic electric pump motor with a conventional copper winding is known.

Die US 2015/111442 A1 beschreibt ein Schweißverfahren für ein mehradriges Kabel, welches an einem Anschlusskörper angelegt und dann umhüllt wird. Derartige Anordnungen für mehradrige Kabel sind auch aus der JP 2015 118826 A und der JP 2015 026429 A bekannt. CN 203 953 323 U offenbart eine elektromagnetische Einspannvorrichtung mit einer Verbindungsanordnung mit einem Kontaktpin.The US 2015/111442 A1 describes a welding process for a multi-core cable, which is applied to a connector body and then sheathed. Such arrangements for multi-core cables are also from the JP 2015 118826 A and the JP 2015 026429 A known. CN 203 953 323 U discloses an electromagnetic jig with a connection arrangement with a contact pin.

Aufgabe der Erfindung ist es insofern, einen elektrischen Pumpenmotor anzugeben, bei dem die zwischen dem Draht und dem Anschlusskörper gebildete Verbindungsstelle besonders wirtschaftlich hergestellt werden kann und in vorteilhafter Weise gegen schädigende Umgebungseinflüsse geschützt ist.The object of the invention is to provide an electric pump motor in which the connection point formed between the wire and the connection body can be produced particularly economically and is advantageously protected against damaging environmental influences.

Zur Lösung der Aufgabe weist die Erfindung die Merkmale des Patentanspruchs 1 auf.To achieve the object, the invention has the features of claim 1.

Es ist dabei der Draht mit dem Anschlusskörper stoffschlüssig verbunden. Nach dem Herstellen der Verbindung wird der Schrumpfschlauch mit dem Innenkleber über die Verbindungstelle gelegt.The wire is firmly bonded to the connector body. After the connection has been made, the shrink tube with the inner adhesive is placed over the connection point.

Beispielsweise wird der Schrumpfschlauch nach dem Herstellen der Umhüllung erwärmt. Beim Umhüllen der Verbindungsstelle mit dem Schrumpfschlauch beziehungsweise beim Erwärmen des Schrumpfschlauchs kann ein Teil des thermoplastischen Innenklebers durch einen Spalt hindurchtreten, welcher zwischen dem Anschlusskörper und dem Schrumpfschlauch gebildet ist.For example, the shrink tube is heated after the covering has been produced. When enveloping the connection point with the shrink tube or when heating the shrink tube, part of the thermoplastic inner adhesive can pass through a gap which is formed between the connection body and the shrink tube.

Der besondere Vorteil der Erfindung besteht darin, dass die Verbindungsstelle durch den Innenkleber und den Schrumpfschlauch in hervorragender Weise elektrisch isoliert ist. Zugleich sind die Verbindungsstelle und der von der Umhüllung umfasste Teil des Drahts vor Korrosion geschützt. Der Schrumpfschlauch mit dem Innenkleber verhindert den Kontakt mit Sauerstoff beziehungsweise Wasser. Der Schrumpfschlauch ist zudem alterungsbeständig. Durch den Innenkleber sowie den Materialeigenschaften des Schrumpfschlauchs ist Spannungsrissen vorgebeugt beziehungsweise die Neigung zum Verspröden minimiert. Die Verbindungsstelle ist beständig gegen aggressive Medien wie Öl, Säure, Lauge beziehungsweise Salze. Des Weiteren ist eine gute Temperaturbeständigkeit in den normalen Betriebstemperaturbereichen einer Aluminiumwicklung für Spulenkörper gewährleistet. Zudem besteht nicht die Gefahr, dass der Schrumpfschlauch schmilzt, da er bei Temperaturen über den kristallinen Schmelzpunkt nicht mehr fließt, sondern elastisch wird wie ein Elastomer.The particular advantage of the invention is that the connection point is excellently electrically insulated by the inner adhesive and the shrink tube. At the same time, the connection point and the part of the wire covered by the sheath are protected against corrosion. The shrink tube with the inner adhesive prevents contact with oxygen or water. The shrink tube is also resistant to aging. The internal adhesive and the material properties of the shrink tube prevent tension cracks or minimize the tendency to become brittle. The connection point is resistant to aggressive media such as oil, acid, alkali or salts. Furthermore, good temperature resistance is guaranteed in the normal operating temperature ranges of an aluminum winding for coil formers. In addition, there is no risk of the shrink tube melting, since it no longer flows at temperatures above the crystalline melting point, but becomes elastic like an elastomer.

Die gute Isolation führt zudem dazu, dass der Draht, wenn er als Aluminiumlackdraht ausgeführt ist, keine zusätzliche Isolationsschicht beziehungsweise keinen zusätzlichen Isolationsschutz mehr bedarf. Des Weiteren begünstigt der verschrumpfte Schlauch, mit dem die Verbindungsstelle umhüllt ist, eine gleichmäßige und dauerhafte Krafteinwirkung auf die Verbindungspunkte. Sie stellt eine zusätzliche mechanische Sicherung dar und gewährleistet eine dauerhaft gute Verbindung. Wirtschaftlich sind die Investitionskosten in die Anlagentechnik gering. Der Verbindungsprozess ist großserientauglich und gut beherrschbar. Die Taktzeiten sind gering.The good insulation also means that the wire, if it is designed as enamelled aluminum wire, no longer requires an additional insulation layer or additional insulation protection. Furthermore, the shrinked hose, with which the connection point is encased, promotes an even and permanent application of force to the connection points. It represents an additional mechanical security and ensures a permanently good connection. The investment costs in plant technology are low economically. The connection process is suitable for large series and easy to control. The cycle times are low.

Nach der Erfindung ist der Draht auf den Anschlusskörper gebondet. Beim Herstellen der Bondstelle kommt ein Bondautomat zum Einsatz. Dabei wird der Draht von einem Werkzeug des Bondautomaten gegen den Anschlusskörper gedrückt und von dem Werkzeug zu Ultraschallschwingungen angeregt.According to the invention, the wire is bonded to the connection body. A bond machine is used to manufacture the bond site. The wire is pressed against the connection body by a tool of the automatic bonding machine and excited by the tool to ultrasonic vibrations.

Nach einer Weiterbildung der Erfindung werden wenigstens zwei Verbindungspunkte ausgebildet. Die wenigstens zwei und bevorzugt alle Verbindungspunkte werden auf einer gleichen Seite des Anschlusskörpers hergestellt.According to a development of the invention, at least two connection points are formed. The at least two and preferably all connection points are produced on the same side of the connection body.

Vorteilhaft kann durch das Bonden von Draht und Anschlusskörper eine stoffschlüssige Verbindung mit einem geringen elektrischen Übergangswiderstand hergestellt werden. Dabei verbessert sich die Zuverlässigkeit der elektrischen Verbindung, wenn zwei oder mehr Verbindungspunkte zwischen dem Draht und dem Anschlusskörper hergestellt werden. Wirtschaftlich vorteilhaft werden die zwei oder mehr Punkte auf einer gemeinsamen Seite des Anschlusskörpers hergestellt, da ein Umpositionieren des Anschlusskörpers und/oder des Drahts beim Herstellen der Verbindung vermieden werden kann.The bonding of wire and connection body can advantageously produce a material connection with a low electrical contact resistance. The reliability of the electrical connection improves when two or more connection points between the wire and the connector body. The two or more points are produced in an economically advantageous manner on a common side of the connection body, since repositioning of the connection body and / or the wire can be avoided when the connection is made.

Optional kann vorgesehen sein, dass der Draht vor dem Bonden an dem Anschlusskörper wenigstens grob positioniert wird. Der Anschlusskörper kann zu diesem Zweck Führungsmittel für den Draht vorsehen. Beispielsweise können an dem Anschlusskörper Führungsausnehmungen für den Draht vorgesehen werden.Optionally, it can be provided that the wire is at least roughly positioned on the connection body before bonding. For this purpose, the connection body can provide guide means for the wire. For example, guide recesses for the wire can be provided on the connection body.

Für die Auswahl des Schrumpfschlauches sind die Geometrie des zu isolierenden Bereichs, das heißt die Geometrie des Anschlusskörpers und der Verbindungsstelle zu berücksichtigen sowie die Qualitätsanforderungen, die an das Produkt gerichtet sind, in Betracht zu ziehen. Hierbei sind besonders die Dauereinsatztemperatur des Schrumpfschlauchs sowie die der durch den Draht gebildeten Wicklung zu berücksichtigen. Ein weiterer wichtiger Parameter ist das zu schützende Volumen, welches der Innenkleber abdichten muss. Dies muss bei der Auswahl des Schrumpfschlauches ebenfalls berücksichtigt werden.When selecting the shrink tube, the geometry of the area to be insulated, i.e. the geometry of the connector body and the connection point, must be taken into account and the quality requirements for the product must be taken into account. The continuous operating temperature of the shrink tube and the winding formed by the wire must be taken into account. Another important parameter is the volume to be protected, which the inner adhesive must seal. This must also be taken into account when selecting the shrink tube.

Die Verwendung des Schrumpfschlauchs mit dem Innenkleber ist verfahrenstechnisch sehr vorteilhaft, da in einem gemeinsamen Verfahrensschritt der Innenkleber und der Schrumpfschlauch angesetzt werden können. Als Innenkleber kann beispielsweise ein thermoplastischer Innenkleber und insbesondere ein Innenkleber auf Polyamid-Basis zur Anwendung kommen. Beispielsweise kann ein Ethylen-Vinylacetat-Copolymer (Elastomerkleber) als Innenkleber zur Anwendung kommen. Insbesondere bei der Verwendung des thermoplastischen Innenklebers kann ein Schmelzpunkt desselben im Bereich von zirka 135 °C vorgesehen sein.The use of the shrink tube with the inner adhesive is very advantageous in terms of process technology, since the inner adhesive and the shrink tube can be applied in a common process step. For example, a thermoplastic inner adhesive and in particular an inner adhesive based on polyamide can be used as the inner adhesive. For example, an ethylene-vinyl acetate copolymer (elastomer adhesive) can be used as an internal adhesive. In particular when using the thermoplastic inner adhesive, a melting point of the same in the range of approximately 135 ° C. can be provided.

Bei der Erprobung des Kontaktierverfahrens des erfindungsgemässen Pumpenmotors hat sich gezeigt, dass ein sehr guter mechanischer Schutz vor Stößen, Schwingungen und dergleichen hergestellt ist. Die elektrisch leitende Verbindung ist daher dauerhaft hergestellt.When testing the contacting method of the pump motor according to the invention, it has been shown that very good mechanical protection against impacts, vibrations and the like is produced. The electrically conductive connection is therefore permanently established.

Die Verbindungsanordnung umfasst insofern einen Anschlusskörper und einen mit dem Anschlusskörper an einer Verbindungsstelle in wenigstens einem Verbindungspunkt stoffschlüssig festgelegten Draht sowie eine Umhüllung für die Verbindungsstelle. Die Umhüllung weist einen den Draht und den Anschlusskörper im Bereich der Verbindungsstelle umgreifenden thermoplastischen Innenkleber sowie einen den Draht und den Anschlusskörper ebenfalls im Bereich der Verbindungsstelle umgreifenden Schrumpfschlauch auf. Beispielsweise dient ein Flachstecker eines Spulenkörpers als Anschlusskörper.In this respect, the connection arrangement comprises a connection body and a wire which is fixed to the connection body at a connection point in at least one connection point, as well as a sheath for the connection point. The sheath has a thermoplastic inner adhesive encompassing the wire and the connection body in the area of the connection point and a shrink tube likewise encompassing the wire and the connection body in the area of the connection point. For example, a flat plug of a coil former serves as a connection body.

Der Innenkleber ist bevorzugt als Elastomerkleber oder thermoplastischer Innenkleber ausgebildet und zwischen dem Anschlusskörper und dem Schrumpfschlauch vorgesehen.The inner adhesive is preferably designed as an elastomer adhesive or thermoplastic inner adhesive and is provided between the connection body and the shrink tube.

Nach einer bevorzugten Ausführungsform der Erfindung sind der Draht und der Anschlusskörper an wenigstens zwei Punkten miteinander stoffschlüssig verbunden. Die zwei Punkte sind nach der bevorzugten Ausführungsform der Erfindung auf einer gemeinsamen Seite des Anschlusskörpers und bevorzugt auf einer gemeinsamen Flachseite des als Anschlusskörper dienenden Flachsteckers vorgesehen.According to a preferred embodiment of the invention, the wire and the connecting body are integrally connected to one another at at least two points. According to the preferred embodiment of the invention, the two points are provided on a common side of the connection body and preferably on a common flat side of the flat plug serving as the connection body.

Erfindungsgemässe Pumpenmotoren weisen insofern eine genannte Verbindungsanordnung auf, um einen Draht der Wicklungen stoffschlüssig an einem Anschlusskörper des Motors festzulegen.To this extent, pump motors according to the invention have a named connection arrangement in order to firmly attach a wire of the windings to a connection body of the motor.

Die stoffschlüssige Verbindung zwischen dem Draht und dem Anschlusskörper ist nach der Erfindung durch Ultraschalldrahtbonden hergestellt.The integral connection between the wire and the connection body is produced according to the invention by ultrasonic wire bonding.

Aus den weiteren Unteransprüchen und der nachfolgenden Beschreibung sind weitere Vorteile, bevorzugte Merkmale und Einzelheiten der Erfindung zu entnehmen. Die Zeichnungen dienen lediglich beispielhaft der Klarstellung der Erfindung und haben keinen einschränkenden Charakter.Further advantages, preferred features and details of the invention can be gathered from the further subclaims and the description below. The drawings serve only as an example to clarify the invention and have no restrictive character.

Es zeigen:

Fig. 1
einen ersten Verfahrensschritt bei der Herstellung einer Verbindungsanordnung eines erfindungsgemässen Pumpenmotors
Fig. 2
die Verbindungsanordnung nach Fig. 1 im fertigen Zustand und
Fig. 3
eine zweite Ausführungsform der Verbindungsanordnung eines erfindungsgemässen Pumpenmotors.
Show it:
Fig. 1
a first method step in the production of a connection arrangement of a pump motor according to the invention
Fig. 2
the connection arrangement according to Fig. 1 in the finished state and
Fig. 3
a second embodiment of the connection arrangement of a pump motor according to the invention.

Nach einer ersten Ausführungsform der Erfindung gemäß der Fig. 1 und 2 ist eine Verbindungsanordnung für einen erfindungsgemässen elektrischen Pumpenmotor vorgesehen, welche zwei Anschlusskörper 4 vorsieht, die nach Art eines Flachsteckers aus einem elektrisch leitenden Werkstoff hergestellt sind. Als Teil der Verbindungsanordnung ist ferner ein Draht 1 vorgesehen, welcher einerseits eine Wicklung 10 bildet und andererseits in zwei Punkten 2, 3 an den Anschlusskörpern 4 festgelegt ist. Die zum stoffschlüssigen, elektrisch leitenden Verbinden des Drahts 1 mit dem Anschlusskörper 4 ausgebildeten Verbindungspunkte 2, 3 sind in dem vorliegenden Ausführungsbeispiel der Erfindung mittels eines Ultraschall-Drahtbondautomaten hergestellt. Es ist hierbei so, dass der Draht 1 von einem Werkzeug des Bondautomaten gegen den Anschlusskörper 4 angedrückt wird und dass das Werkzeug zu Ultraschallschwingungen angeregt wird. Aufgrund der Ultraschallschwingungen verbindet sich der Draht 1 stoffschlüssig mit dem Anschlusskörper 4.According to a first embodiment of the invention according to the Fig. 1 and 2nd A connection arrangement is provided for an electric pump motor according to the invention, which provides two connection bodies 4, which are made in the manner of a flat plug from an electrically conductive material. As part of the connection arrangement, a wire 1 is also provided, which on the one hand forms a winding 10 and on the other hand is fixed to the connection bodies 4 in two points 2, 3. The connection points 2, 3 designed for the cohesive, electrically conductive connection of the wire 1 to the connection body 4 are produced in the present exemplary embodiment of the invention by means of an ultrasonic wire bonding machine. It is the case here that the wire 1 is pressed against the connection body 4 by a tool of the automatic bonding machine and that the tool is excited to produce ultrasonic vibrations. Due to the ultrasonic vibrations, the wire 1 is connected to the connector body 4 in a cohesive manner.

Eine Festlegung des Drahts 1 an dem Anschlusskörper 4 gemäß Fig. 1 wird insbesondere vor dem Herstellen der Bondverbindung erreicht, indem der Draht 1 um den Anschlusskörper 4 gewickelt und im Bereich von zwei Führungsausnehmungen 9 positioniert wird, welche an zwei einander gegenüberliegenden Schmalseiten des Flachsteckers 4 gebildet sind. Die Verbindungspunkte 2, 3 sind an zwischen den Führungsausnehmungen 9 auf einer gleichen Flachseite des Anschlusskörpers 4 vorgesehen.A determination of the wire 1 on the connector body 4 according to Fig. 1 is achieved in particular before the bond connection is established by winding the wire 1 around the connection body 4 and positioning it in the region of two guide recesses 9 which are formed on two opposite narrow sides of the flat plug 4. The connection points 2, 3 are provided on between the guide recesses 9 on the same flat side of the connection body 4.

Nach dem Herstellen der elektrisch leitenden Verbindung zwischen dem Draht 1 und dem Anschlusskörper 4 wird im Weiteren im Bereich der die Punkte 2, 3 umfassenden Verbindungsstelle ein Schrumpfschlauch 6 mit einem thermoplastischen Innenkleber 7 aufgebracht, der die Verbindungsstelle elektrisch isoliert und kapselt (vergleiche Fig. 2). Der Schrumpfschlauch 6 umgreift hierbei den Anschlusskörper 4 mit dem Draht 1 sowie dem thermoplastischen Innenkleber 7. Der Schrumpfschlauch 6 wird nach dem Herstellen der Umhüllung erwärmt. Im Bereich eines zwischen dem Anschlusskörper 4 einerseits und dem Schrumpfschlauch 6 andererseits gebildeten Spalts tritt ein Teil des thermoplastischen Innenklebers 7 aus (nicht dargestellt).After the electrically conductive connection between the wire 1 and the connecting body 4 has been established, a shrink tube 6 with a thermoplastic inner adhesive 7 is applied in the area of the connection point comprising points 2, 3, which electrically insulates and encapsulates the connection point (cf. Fig. 2 ). The shrink tube 6 encompasses the connecting body 4 with the wire 1 and the thermoplastic inner adhesive 7. The shrink tube 6 is heated after the covering has been produced. In the area of a gap formed between the connector body 4 on the one hand and the shrink tube 6 on the other hand, part of the thermoplastic inner adhesive 7 emerges (not shown).

Die Anschlusskörper 4 dienen der Kontaktierung der von einem Spulenkörper 5 getragenen Wicklungen 10. Vorliegend ist ein weiterer Anschlusskörper 8 vorgesehen, welcher elektrisch nicht kontaktiert ist und in der dargestellten Ausführungsform ohne Funktion bleibt.The connection bodies 4 are used for contacting the windings 10 carried by a coil body 5. In the present case, a further connection body 8 is provided, which is not electrically contacted and remains inoperative in the embodiment shown.

Nach einer zweiten Ausführungsform der Erfindung gemäß Fig. 3 ist in einer zweiten Verbindungsanordnung der Spulenkörper 5 mit den zwei Anschlusskörpern 4 dahingehend modifiziert, dass die als Flachstecker ausgeführten Anschlusskörper 4 in einer gleichen Orientierung vorgesehen sind, wohingegen in dem ersten Ausführungsbeispiel der Erfindung die Anschlusskörper 4 eine um 90° gedrehte Orientierung zueinander aufweisen.According to a second embodiment of the invention Fig. 3 In a second connection arrangement, the coil body 5 with the two connection bodies 4 is modified in such a way that the connection bodies 4 designed as flat plugs are provided in the same orientation, whereas in the first exemplary embodiment of the invention, the connection bodies 4 have an orientation that is rotated by 90 ° to one another.

Die Erfindung ist nicht auf die vorstehend diskutierte und in den Figuren gezeigten Ausführungsformen beschränkt.The invention is not restricted to the embodiments discussed above and shown in the figures.

Als Innenkleber kann ein Elastomerkleber vorgesehen werden und insbesondere ein Innenkleber auf Ethylen-Vinylacetat-Basis (Ethylen-Vinylacetat-Copolymer).An elastomer adhesive can be provided as the internal adhesive, and in particular an internal adhesive based on ethylene-vinyl acetate (ethylene-vinyl acetate copolymer).

Gleiche Bauteile und Bauteilfunktionen sind durch gleiche Bezugszeichen gekennzeichnet.The same components and component functions are identified by the same reference symbols.

Die Erfindung ist nicht auf die vorliegend dargestellte Ausführungsvariante beschränkt. Insbesondere kann der Anschlusskörper 4 eine abweichende Geometrie aufweisen.The invention is not limited to the embodiment variant shown here. In particular, the connector body 4 can have a different geometry.

Claims (7)

  1. Electric pump motor comprising a winding (10) which is provided on a bobbin (5) of the pump motor, and comprising a connecting element (4) for electrically contacting the winding (10), wherein an aluminium wire (1) of the winding (10) is connected to the connecting element (4) by means of a connection arrangement, said connection arrangement comprising the connecting element (4) and the wire (1) which is bonded to at least one point (2, 3) at a junction point on the connecting element (4), as well as a sheath for the junction point manufactured after the bonding, characterised in that the sheath provides heat-shrink tubing (6) with an adhesive inner liner (7) and grips the wire (1) and the connecting element (4) in the region of the junction point, and in that the bonded connection at the at least one point (2, 3) is made by an automatic bonding machine, wherein in making the connection the wire (1) was pressed against the connecting element (4) by means of a tool of the automatic bonding machine and energised by the tool to produce ultrasonic vibrations.
  2. Electric pump motor according to claim 1, characterised in that the aluminium wire (1) is an aluminium enamelled wire in design.
  3. Electric pump motor according to claim 1 or 2, characterised in that the connecting element (4) is provided by means of a blade terminal of the bobbin (5).
  4. Electric pump motor according to any one of claims 1 to 3, characterised in that the adhesive inner liner (7) is provided between the connecting element (4) and the heat-shrink tubing (6).
  5. Electric pump motor according to any one of claims 1 to 4, characterised in that the wire (1) is connected to the connecting element (4) at at least two points (2, 3), wherein said points (2, 3) are provided on a common face of the connecting element (4) and in particular, for a pump motor according to claim 3, on an identical flat face of the blade terminal.
  6. Electric pump motor according to any one of claims 1 to 5, characterised in that a thermoplastic adhesive inner liner and/or an elastomeric adhesive are provided as an adhesive inner liner (7).
  7. Electric pump motor according to any one of claims 1 to 6, characterised in that at least two and preferably all points (2, 3) of the junction point are manufactured on an identical flat face of the connecting element (4).
EP17165112.8A 2016-05-27 2017-04-05 Electric pump motor Active EP3249662B1 (en)

Priority Applications (1)

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PL17165112T PL3249662T3 (en) 2016-05-27 2017-04-05 Electric pump motor

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DE102016109797 2016-05-27
DE102017106769 2017-03-29

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DE102020122404A1 (en) * 2020-08-27 2022-03-03 Vem Sachsenwerk Gmbh Climate-proof magnetic coil

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DE19852929C1 (en) * 1998-11-17 2000-03-30 Hanning Elektro Werke Thermal switch for protecting electromagnetic coils in electric motor has connection lugs which enter receptacles of flat pinned plugs from inner surface of end flange of coil
JP2002540161A (en) * 1999-03-26 2002-11-26 ザ ユニヴァーシティー オブ テキサス システム Polysaccharide modulators and their uses
GB2354639B (en) * 1999-09-17 2003-09-24 Honda Lock Mfg Co Ltd Electromagnetic coil device
JP2008113539A (en) * 2006-10-03 2008-05-15 Denso Corp Ac rotary electric machine
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JP5452570B2 (en) * 2011-11-09 2014-03-26 三菱電機株式会社 Rotating electric machine and method of manufacturing stator coil connection unit
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EP3249662A1 (en) 2017-11-29
US10439301B2 (en) 2019-10-08
US20170346199A1 (en) 2017-11-30

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