EP1705751A1 - Power connection for a power control unit of a battery driven lift truck - Google Patents

Power connection for a power control unit of a battery driven lift truck Download PDF

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Publication number
EP1705751A1
EP1705751A1 EP06003334A EP06003334A EP1705751A1 EP 1705751 A1 EP1705751 A1 EP 1705751A1 EP 06003334 A EP06003334 A EP 06003334A EP 06003334 A EP06003334 A EP 06003334A EP 1705751 A1 EP1705751 A1 EP 1705751A1
Authority
EP
European Patent Office
Prior art keywords
component
power
circuit board
control unit
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06003334A
Other languages
German (de)
French (fr)
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EP1705751B1 (en
Inventor
Thomas Dipl.-Ing. Schuldt
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Jungheinrich AG
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Jungheinrich AG
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Publication of EP1705751A1 publication Critical patent/EP1705751A1/en
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Publication of EP1705751B1 publication Critical patent/EP1705751B1/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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/307—Clamped connections, spring connections utilising a screw or nut clamping member characterised by the thread of the screw or nut
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H01R4/5016—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a cone
    • H01R4/5025—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a cone combined with a threaded ferrule operating in a direction parallel to the conductor
    • 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
    • H01R4/56—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 one conductor screwing into another
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/57—Fixed connections for rigid printed circuits or like structures characterised by the terminals surface mounting terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB
    • H01R12/718—Contact members provided on the PCB without an insulating housing
    • 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
    • H01R4/02—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
    • H01R4/58—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

Definitions

  • the invention relates to a power connection for a power and control unit of a battery-powered truck according to claim 1.
  • a power and control unit of a truck To supply a power and control unit of a truck is usually provided between a battery and the unit a cable connection.
  • the cable must be connected to the one hand with the contacts of the battery and the other with the power and control unit.
  • the invention relates to the latter power connection.
  • the power and control unit has a converter or inverter for converting the DC voltage into an alternating or three-phase voltage.
  • the electrical or electronic components of the power and control unit are usually arranged on at least one printed circuit board, which is arranged in isolation within a housing. It is already known to connect to the circuit board an electrically conductive member which cooperates with a second bolt-shaped conductive component by being pushed onto a journal portion of the first component. The outer end of the second component is connected approximately to the cable lug of the conductor of the power cable.
  • the second component which is shaped as a plug-in sleeve, works in a similar way to a snap closure and thus transmits the current only via a circular contact line. The power transmission capability is therefore limited.
  • the known power connection from the manufacturing effort is expensive.
  • a terminal for electrical equipment in which a slidable plate is connected to a printed circuit board as a connecting plate and a clamping screw is held captive on a housing upper part.
  • the connecting plate has a threaded passage, or it is provided a threaded insert for receiving the clamping screw.
  • the connecting plate can be soldered in the SMD method with the circuit board.
  • the invention has for its object to provide a power connection for a power and control unit of a battery-powered truck, which is inexpensive to produce, can be arranged to save space and allows the transmission of high currents.
  • the first component has a connectable to the circuit board first portion, a male thread having a second portion and an annular portion containing an annular third portion.
  • the first component is e.g. soldered to the PCB in the SMD process.
  • the second component has an axial bore with an internal thread in one end region.
  • the internal thread can be screwed onto the external thread of the first component.
  • the second component has an annular second contact surface which engages the first contact surface when the two components are screwed together. As a result, a full surface contact between the two components is produced, so that a transmission of high currents is possible.
  • the other end of the second bolt-shaped component is designed so that a connection to a conductor of a cable is possible, for example via a cable lug, which is clamped by means of a clamping screw on the second component.
  • the first component has a cylindrical projection and the second component has a cylindrical bore, wherein cylindrical projection and bore together form a press fit.
  • the second component is therefore with a considerable force on the first postpone and press, whereby a flat contact between the surfaces in contact comes. Also in this way a large contact area for the transmission of high currents is created.
  • the power connection according to the invention has the further advantage that it can be produced very easily and has very small dimensions.
  • spatial dimensions play a major role in components and components of a truck.
  • the contact surfaces are conically shaped.
  • the first component made of softer material than the second component.
  • a power and control unit 10 of an industrial truck is merely indicated. It contains an insulating housing 12, in which at least one printed circuit board 14 is arranged in isolation.
  • a first component 16 is soldered to the printed circuit board 14.
  • a second component 18 is screwed to the first component 16. This will be discussed below.
  • the bolt-shaped member 18 is led out.
  • the bolt-shaped or cylindrical member 18 at the lower end has a first axial threaded bore 28 which is flared toward the free end or down to a conical surface 30.
  • a further threaded bore 32 is formed in the upper end region.
  • the component 18 at the upper end opposite flats 34 form the so-called key areas.
  • the component 16 according to FIG. 1 has a circular flange-like section 36, on which a conical section 38 adjoins upward.
  • An adjoining upward cylindrical portion 40 has an external thread 42.
  • the component 16 finally has an axial through bore 42.
  • the component 16 is connected to the printed circuit board 14 via e.g. soldered an SMD process.
  • the component 18, e.g. is made of aluminum, is screwed onto the component 16 with the lower end, wherein the thread 42 of the component 16 cooperates with the internal thread of the threaded bore 28.
  • the conical contact surface 30 bears against the outer surface of the conical section 38 of the component 16, which consists of somewhat harder material, for example silver-plated brass. In this way, a continuous annular contact surface is created.
  • the component 18 is screwed with greater force to the component 16, so that a relatively high surface pressure between the contact surfaces is generated.
  • the clamping screw 26 With its shaft (not visible) is screwed.
  • the bottom of the head of the clamping screw 26 is pressed against the top of the cable lug and this against the upper end of the bolt-shaped member 18 to produce the desired electrical contact.
  • Fig. 5 an alternative embodiment to the component 18 is shown, which is denoted there by 18a. It has a conical shoulder 44 between the ends on. Thus, the upper portion of the component 18a is provided with a smaller diameter than the lower one. The key surfaces 34a are located below the shoulder 44. Inside, the shape of the component 18a is the same as the component 18 of Figures 2 and 3.
  • a first component 16b is provided with a flange 36b for soldering to a printed circuit board, such as the printed circuit board 14 of FIG. 1.
  • a cylindrical portion 50 Integrally formed in the flange 36b is a cylindrical portion 50 having a predetermined outer diameter.
  • a bolt-like second component 18b has a blind bore 52 at the lower end. The inner diameter of the bore 52 is slightly smaller than the outer diameter of the cylindrical portion 50.
  • the bolt-shaped member 18b must therefore be pushed with a considerable force on the cylindrical portion 50 (press fit).
  • the cylindrical portion 50 is tapered as shown at 54. In this way, a large cylindrical contact surface is created for transmitting high currents from the component 18b to the component 36b and thus to the printed circuit board. If the free end of the bolt-shaped component 18b bears against the upper side of the flange 36b, this results in a further possibility of contact.
  • a continuous axial bore 32b is also provided in the component 18b.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The connection has a power and control unit having a PCB inside a casing. The first component (16) has a first portion connectable to the PCB, a second portion (40) having a male thread (42), and a third portion (38) including an annular or conical or cylindrical first contact surface. The second component (18) has an axial bore (28) with a female thread within a first end portion screwed onto the male thread of the first component so as to cause the first contact surface to abut against an annular second contact surface (30) of the second component.

Description

Die Erfindung bezieht sich auf einen Stromanschluß für eine Leistungs- und Steuereinheit eines batteriebetriebenen Flurförderzeugs nach dem Patentanspruch 1.The invention relates to a power connection for a power and control unit of a battery-powered truck according to claim 1.

Zur Versorgung einer Leistungs- und Steuereinheit eines Flurförderzeugs ist üblicherweise zwischen einer Batterie und der Einheit eine Kabelverbindung vorgesehen. Das Kabel muß zum einen mit den Kontakten der Batterie verbunden werden und zum anderen mit der Leistungs- und Steuereinheit. Die Erfindung bezieht sich auf den letzteren Stromanschluß.To supply a power and control unit of a truck is usually provided between a battery and the unit a cable connection. The cable must be connected to the one hand with the contacts of the battery and the other with the power and control unit. The invention relates to the latter power connection.

Die Leistungs- und Steuereinheit weist unter anderem einen Um- bzw. Wechselrichter auf zur Umwandlung der Gleichspannung in eine Wechsel- oder Drehspannung. Die elektrischen bzw. elektronischen Bauteile der Leistungs- und Steuereinheit sind üblicherweise auf mindestens einer Leiterplatte angeordnet, die isoliert innerhalb eines Gehäuses angeordnet ist. Es ist bereits bekannt, mit der Leiterplatte ein elektrisch leitendes Bauteil zu verbinden, das mit einem zweiten bolzenförmigen leitenden Bauteil zusammenwirkt, indem es auf einen Zapfenabschnitt des ersten Bauteils aufgeschoben wird. Das außen liegende Ende des zweiten Bauteils wird etwa mit dem Kabelschuh des Leiters des Stromkabels verbunden. Im bekannten Fall arbeitet das zweite Bauteil, das als Steckhülse geformt ist, ähnlich einem Schnappverschluß und überträgt somit den Strom nur über eine kreisförmige Berührungslinie. Die Stromübertragungsfähigkeit ist daher begrenzt. Außerdem ist der bekannte Stromanschluß vom Herstellungsaufwand her gesehen aufwendig.Among other things, the power and control unit has a converter or inverter for converting the DC voltage into an alternating or three-phase voltage. The electrical or electronic components of the power and control unit are usually arranged on at least one printed circuit board, which is arranged in isolation within a housing. It is already known to connect to the circuit board an electrically conductive member which cooperates with a second bolt-shaped conductive component by being pushed onto a journal portion of the first component. The outer end of the second component is connected approximately to the cable lug of the conductor of the power cable. In the known case, the second component, which is shaped as a plug-in sleeve, works in a similar way to a snap closure and thus transmits the current only via a circular contact line. The power transmission capability is therefore limited. In addition, the known power connection from the manufacturing effort is expensive.

Aus DE 196 54 384 A1 ist eine Anschlußklemme für elektrische Geräte bekannt geworden, bei der als Anschlußblech eine gleitfähige Platte mit einer Leiterplatte verbunden wird und eine Klemmschraube unverlierbar an einem Gehäuseoberteil gehalten ist. Das Anschlußblech weist einen Gewindedurchzug auf, oder es ist ein Gewindeeinsatz vorgesehen zur Aufnahme der Klemmschraube. Das Anschlußblech kann im SMD-Verfahren mit der Leiterplatte verlötet sein.Out DE 196 54 384 A1 a terminal for electrical equipment has become known, in which a slidable plate is connected to a printed circuit board as a connecting plate and a clamping screw is held captive on a housing upper part. The connecting plate has a threaded passage, or it is provided a threaded insert for receiving the clamping screw. The connecting plate can be soldered in the SMD method with the circuit board.

Der Erfindung liegt die Aufgabe zugrunde, einen Stromanschluß für eine Leistungs- und Steuereinheit eines batteriebetriebenen Flurförderzeugs zu schaffen, der wenig aufwendig herstellbar ist, raumsparend angeordnet werden kann und die Übertragung hoher Ströme ermöglicht.The invention has for its object to provide a power connection for a power and control unit of a battery-powered truck, which is inexpensive to produce, can be arranged to save space and allows the transmission of high currents.

Diese Aufgabe wird durch die Merkmale der Patentansprüche 1 und 2 gelöst.This object is solved by the features of claims 1 and 2.

Beim erfindungsgemäßen Stromanschluß nach Anspruch 1 weist das erste Bauteil einen mit der Leiterplatte verbindbaren ersten Abschnitt auf, einen ein Außengewinde aufweisenden zweiten Abschnitt sowie einen eine ringförmige Kontaktfläche enthaltenen dritten Abschnitt. Das erste Bauteil wird z.B. im SMD-Verfahren mit der Leiterplatte verlötet.In the power connector according to the invention according to claim 1, the first component has a connectable to the circuit board first portion, a male thread having a second portion and an annular portion containing an annular third portion. The first component is e.g. soldered to the PCB in the SMD process.

Das zweite Bauteil weist in einem Endbereich eine axiale Bohrung mit Innengewinde auf. Das Innengewinde ist auf das Außengewinde des ersten Bauteils aufschraubbar. Ferner weist das zweite Bauteil eine ringförmige zweite Kontaktfläche auf, die mit der ersten Kontaktfläche in Eingriff gelangt, wenn die beiden Bauteile aufeinandergeschraubt werden. Dadurch wird ein satter flächiger Kontakt zwischen den beiden Bauteilen hergestellt, so daß eine Übertragung hoher Ströme möglich ist.The second component has an axial bore with an internal thread in one end region. The internal thread can be screwed onto the external thread of the first component. Furthermore, the second component has an annular second contact surface which engages the first contact surface when the two components are screwed together. As a result, a full surface contact between the two components is produced, so that a transmission of high currents is possible.

Das andere Ende des zweiten bolzenförmigen Bauteils ist so ausgebildet, daß eine Verbindung mit einem Leiter eines Kabels möglich ist, beispielsweise über einen Kabelschuh, der mit Hilfe einer Klemmschraube an dem zweiten Bauteil angeklemmt wird.The other end of the second bolt-shaped component is designed so that a connection to a conductor of a cable is possible, for example via a cable lug, which is clamped by means of a clamping screw on the second component.

Bei dem erfindungsgemäßen Stromanschluß nach Anspruch 2 weist das erste Bauteil einen zylindrischen Ansatz auf und das zweite Bauteil eine zylindrische Bohrung, wobei zylindrischer Ansatz und Bohrung zusammen eine Presspassung bilden. Das zweite Bauteil ist daher mit einer nicht unerheblichen Kraft auf das erste aufzuschieben und zu pressen, wodurch einem flächigen Kontakt zwischen den in Berührung tretenden Flächen kommt. Auch auf diese Weise ist eine große Kontaktfläche zur Übertragung hoher Ströme geschaffen.In the power connector according to the invention according to claim 2, the first component has a cylindrical projection and the second component has a cylindrical bore, wherein cylindrical projection and bore together form a press fit. The second component is therefore with a considerable force on the first postpone and press, whereby a flat contact between the surfaces in contact comes. Also in this way a large contact area for the transmission of high currents is created.

Neben der Übertragungsmöglichkeit hoher Ströme hat der erfindungsgemäße Stromanschluß den weiteren Vorteil, daß er sehr einfach hergestellt werden kann und sehr geringe Abmessungen aufweist. Bekanntlich spielen räumliche Abmessungen bei Bauteilen und Komponenten eines Flurförderzeugs eine große Rolle.In addition to the possibility of high currents, the power connection according to the invention has the further advantage that it can be produced very easily and has very small dimensions. As is known, spatial dimensions play a major role in components and components of a truck.

Nach einer Ausgestaltung der Erfindung sind die Kontaktflächen konisch geformt. Nach einer weiteren Ausgestaltung der Erfindung ist das erste Bauteil aus weicherem Material als das zweite Bauteil hergestellt. Bei dem Aufschrauben des zweiten Bauteils auf das erste wird bei einem entsprechenden Drehmoment eine gewisse Verformung des zweiten Bauteils im Bereich der zweiten Kontaktfläche erfolgen, so daß eine satte Anlage der Kontaktflächen zwecks günstiger Stromübertragung gewährleistet ist. Dabei wird von der Kenntnis ausgegangen, daß ein wiederholtes Lösen des Stromanschlusses an dieser Stelle nicht erforderlich ist. Ein wiederholtes Lösen ist am anderen Ende des Versorgungskabel erforderlich, wenn die Batterie über ein Ladekabel aufgeladen wird.According to one embodiment of the invention, the contact surfaces are conically shaped. According to a further embodiment of the invention, the first component made of softer material than the second component. When the second component is screwed onto the first one, with a corresponding torque, a certain deformation of the second component takes place in the region of the second contact surface, so that a full contact of the contact surfaces is ensured for the purpose of favorable power transmission. This is based on the knowledge that a repeated release of the power supply is not required at this point. Repeated release is required at the other end of the supply cable when charging the battery via a charging cable.

Die Erfindung soll nachfolgend anhand eines in Zeichnungen dargestellten Ausführungsbeispiels näher erläutert werden.

Fig. 1
zeigt äußerst schematisch eine Seitenansicht eines erfindungsgemäßen Stromanschlusses für eine Leistungs- und Steuereinheit eines Flurförderzeugs.
Fig. 2
zeigt die Seitenansicht des bolzenförmigen Bauteils des Stromanschlusses nach Fig. 1.
Fig. 3
zeigt einen Schnitt durch die Darstellung nach Fig. 2 entlang der Linie 3-3.
Fig. 4
zeigt eine Draufsicht auf das Bauteil nach Fig. 1 in Richtung Pfeil 4.
Fig. 5
zeigt die Seitenansicht eines alternativen bolzenförmigen Bauteils.
Fig. 6
zeigt die Seitenansicht eines weiteren Bauteils des Stromanschlusses nach Fig. 1.
Fig. 7
zeigt die Draufsicht auf das Bauteil nach Fig. 6.
Fig. 8
zeigt einen Schnitt durch eine andere Ausführungsform eines Stromanschlusses nach der Erfindung.
The invention will be explained in more detail with reference to an embodiment shown in the drawings.
Fig. 1
shows very schematically a side view of a power connector according to the invention for a power and control unit of a truck.
Fig. 2
shows the side view of the bolt-shaped component of the power connector of FIG. 1st
Fig. 3
shows a section through the illustration of FIG. 2 along the line 3-3.
Fig. 4
shows a plan view of the component of FIG. 1 in the direction of arrow 4th
Fig. 5
shows the side view of an alternative bolt-shaped component.
Fig. 6
shows the side view of another component of the power connector of FIG. 1st
Fig. 7
shows the top view of the component according to FIG. 6.
Fig. 8
shows a section through another embodiment of a power connector according to the invention.

In Fig. 1 ist eine Leistungs- und Steuereinheit 10 eines Flurförderzeugs lediglich angedeutet. Es enthält ein isolierendes Gehäuse 12, in dem mindestens eine Leiterplatte 14 isoliert angeordnet ist. Im SMD-Verfahren ist ein erstes Bauteil 16 auf der Leiterplatte 14 verlötet. Ein zweites Bauteil 18 ist mit dem ersten Bauteil 16 verschraubt. Hierauf wird weiter unten noch eingegangen.In Fig. 1, a power and control unit 10 of an industrial truck is merely indicated. It contains an insulating housing 12, in which at least one printed circuit board 14 is arranged in isolation. In the SMD method, a first component 16 is soldered to the printed circuit board 14. A second component 18 is screwed to the first component 16. This will be discussed below.

Über eine Öffnung im Deckenabschnitt des Gehäuses 12 mit einer Dichtung 20 ist das bolzenförmige Bauteil 18 herausgeführt. Ein Kabelschuh 22 eines Kabels 24, das zu einer nicht gezeigten Batterie des nicht gezeigten Flurförderzeugs geführt ist, ist mit Hilfe einer Klemmschraube 26 am oberen Ende des Bauteils 18 angeklemmt.About an opening in the ceiling portion of the housing 12 with a seal 20, the bolt-shaped member 18 is led out. A lug 22 of a cable 24, which is guided to a battery, not shown, of the truck, not shown, is clamped by means of a clamping screw 26 at the upper end of the component 18.

Aus Fig. 3 ist zu erkennen, daß das bolzenförmige bzw. zylinderförmige Bauteil 18 am unteren Ende eine erste axiale Gewindebohrung 28 aufweist, die zum freien Ende hin bzw. nach unten zu einer konischen Fläche 30 aufgeweitet ist. Im oberen Endbereich ist eine weitere Gewindebohrung 32 geformt. Ferner weist das Bauteil 18 am oberen Ende gegenüberliegend Abflachungen 34 auf, die sogenannte Schlüsselflächen bilden. Das Bauteil 16 gemäß Fig. 1 weist einen kreisförmigen flanschartigen Abschnitt 36 auf, an dem sich nach oben ein konischer Abschnitt 38 anschließt. Ein sich daran nach oben anschließender zylindrischer Abschnitt 40 weist ein Außengewinde 42 auf. Das Bauteil 16 weist schließlich eine axiale Durchbohrung 42 auf.From Fig. 3 it can be seen that the bolt-shaped or cylindrical member 18 at the lower end has a first axial threaded bore 28 which is flared toward the free end or down to a conical surface 30. In the upper end region, a further threaded bore 32 is formed. Furthermore, the component 18 at the upper end opposite flats 34, form the so-called key areas. The component 16 according to FIG. 1 has a circular flange-like section 36, on which a conical section 38 adjoins upward. An adjoining upward cylindrical portion 40 has an external thread 42. The component 16 finally has an axial through bore 42.

Das Bauteil 16 wird mit der Leiterplatte 14 über z.B. ein SMD-Verfahren verlötet. Das Bauteil 18, das z.B. aus Aluminium besteht, wird mit dem unteren Ende auf das Bauteil 16 aufgeschraubt, wobei das Gewinde 42 des Bauteils 16 mit dem Innengewinde der Gewindebohrung 28 zusammenwirkt. Die konische Kontaktfläche 30 legt sich dabei gegen die Außenfläche des konischen Abschnitts 38 des Bauteils 16, das aus etwas härterem Material besteht, beispielsweise versilbertem Messing. Auf diese Weise wird eine durchgehende ringförmige Kontaktfläche geschaffen. Mit Hilfe eines an den Schlüsselflächen 34 angreifenden Schlüssels wird das Bauteil 18 mit größerer Kraft auf das Bauteil 16 aufgeschraubt, so daß eine relativ hohe Flächenpressung zwischen den Kontaktflächen erzeugt wird.The component 16 is connected to the printed circuit board 14 via e.g. soldered an SMD process. The component 18, e.g. is made of aluminum, is screwed onto the component 16 with the lower end, wherein the thread 42 of the component 16 cooperates with the internal thread of the threaded bore 28. The conical contact surface 30 bears against the outer surface of the conical section 38 of the component 16, which consists of somewhat harder material, for example silver-plated brass. In this way, a continuous annular contact surface is created. With the help of an attacking on the key surfaces 34 key, the component 18 is screwed with greater force to the component 16, so that a relatively high surface pressure between the contact surfaces is generated.

In die obere Gewindebohrung 32 wird die Klemmschraube 26 mit ihrem Schaft (nicht zu erkennen) eingeschraubt. Die Unterseite des Kopfes der Klemmschraube 26 wird dabei gegen die Oberseite des Kabelschuhs gepreßt und dieser gegen das obere Ende des bolzenförmigen Bauteils 18, um den gewünschten elektrischen Kontakt herzustellen.In the upper threaded bore 32, the clamping screw 26 with its shaft (not visible) is screwed. The bottom of the head of the clamping screw 26 is pressed against the top of the cable lug and this against the upper end of the bolt-shaped member 18 to produce the desired electrical contact.

In Fig. 5 ist eine alternative Ausführungsform zum Bauteil 18 gezeigt, das dort mit 18a bezeichnet ist. Es weist eine konische Schulter 44 zwischen den Enden auf. Somit ist der obere Abschnitt des Bauteils 18a mit einem kleineren Durchmesser versehen als der untere. Die Schlüsselflächen 34a befinden sich unterhalb der Schulter 44. Innen ist die Formgebung des Bauteils 18a die gleiche wie des Bauteils 18 nach den Figuren 2 und 3.In Fig. 5, an alternative embodiment to the component 18 is shown, which is denoted there by 18a. It has a conical shoulder 44 between the ends on. Thus, the upper portion of the component 18a is provided with a smaller diameter than the lower one. The key surfaces 34a are located below the shoulder 44. Inside, the shape of the component 18a is the same as the component 18 of Figures 2 and 3.

In Figur 8 ist ein erstes Bauteil 16b mit einem Flansch 36b versehen zur Anlötung an eine Leiterplatte, etwa die Leiterplatte 14 aus Figur 1. Einteilig wird im Flansch 36b ist ein zylindrischer Abschnitt 50 geformt, der einen vorgegebenen Außendurchmesser aufweist. Ein bolzenartiges zweites Bauteil 18b weist am unteren Ende eine Sackbohrung 52 auf. Der Innendurchmesser der Bohrung 52 ist geringfügig kleiner als der Außendurchmesser des zylindrischen Abschnittes 50. Das bolzenförmige Bauteil 18b muß daher mit einer nicht unerheblichen Kraft auf den zylindrischen Abschnitt 50 aufgeschoben werden (Presspassung). Um diesen Vorgang zu erleichtern ist der zylindrische Abschnitt 50 konisch abgeschrägt, wie bei 54 gezeigt. Auf diese Weise ist eine große zylindrische Kontaktfläche geschaffen zur Übertragung hoher Ströme vom Bauteil 18b auf das Bauteil 36b und damit auf die Leiterplatte. Legt sich das freie Ende des bolzenförmigen Bauteils 18b gegen die Oberseite des Flansches 36b an, ergibt sich hier eine weitere Kontaktmöglichkeit.In FIG. 8, a first component 16b is provided with a flange 36b for soldering to a printed circuit board, such as the printed circuit board 14 of FIG. 1. Integrally formed in the flange 36b is a cylindrical portion 50 having a predetermined outer diameter. A bolt-like second component 18b has a blind bore 52 at the lower end. The inner diameter of the bore 52 is slightly smaller than the outer diameter of the cylindrical portion 50. The bolt-shaped member 18b must therefore be pushed with a considerable force on the cylindrical portion 50 (press fit). To facilitate this operation, the cylindrical portion 50 is tapered as shown at 54. In this way, a large cylindrical contact surface is created for transmitting high currents from the component 18b to the component 36b and thus to the printed circuit board. If the free end of the bolt-shaped component 18b bears against the upper side of the flange 36b, this results in a further possibility of contact.

Wie schon beim Bauteil 18 ist auch beim Bauteil 18b eine durchgehende axiale Bohrung 32b vorgesehen.As with the component 18, a continuous axial bore 32b is also provided in the component 18b.

Claims (8)

Stromanschluß für eine Leistungs- und Steuereinheit eines batteriebetriebenen Flurförderzeugs, wobei die Leistungs- und Steuereinheit eine Leiterplatte innerhalb eines Gehäuses aufweist, der Stromanschluß ein erstes mit der Leiterplatte verbindbares Bauteil und ein isoliert aus dem Gehäuse herausgeführtes bolzenförmiges zweites Bauteil aufweist, das im elektrischen Kontakt mit dem ersten Bauteil bringbar ist und wobei ein außerhalb des Gehäuses liegender Abschnitt des zweiten Bauteils Mittel aufweist zur Verbindung mit einer Leiterklemme, dadurch gekennzeichnet, daß das erste Bauteil (16) einen mit der Leiterplatte verbindbaren ersten Abschnitt, einen ein Außengewinde (42) aufweisenden zweiten Abschnitt (40) und einen eine ringförmige bzw. konische bzw. zylindrische erste Kontaktfläche enthaltenen dritten Abschnitt (38) aufweist, das zweite Bauteil (18) in einem ersten Endbereich eine axiale Bohrung (28) mit Innengewinde aufweist, das auf das Außengewinde (42) des ersten Bauteils (16) so aufschraubbar ist, daß die erste Kontaktfläche gegen eine ringförmige zweite Kontaktfläche (30) des zweiten Bauteils (18) zur Anlage gelangt.Power connection for a power and control unit of a battery-powered industrial truck, wherein the power and control unit comprises a printed circuit board within a housing, the power connector having a first connectable to the circuit board component and an isolated led out of the housing bolt-shaped second component which in electrical contact with the first component can be brought and wherein a lying outside the housing portion of the second component comprises means for connection to a conductor terminal, characterized in that the first component (16) connectable to the circuit board first portion, an external thread (42) having second Section (40) and a third or conical or cylindrical first contact surface third section (38), the second component (18) in a first end region having an axial bore (28) with internal thread on the external thread (42 ) of the first Component (16) can be screwed so that the first contact surface against an annular second contact surface (30) of the second component (18) comes into abutment. Stromanschluß für eine Leistungs- und Steuereinheit eines batteriebetriebenen Flurförderzeugs, wobei die Leistungs- und Steuereinheit eine Leiterplatte innerhalb eines Gehäuses aufweist, der Stromanschluß ein erstes mit der Leiterplatte verbindbares Bauteil und ein isoliert aus dem Gehäuse herausgeführtes bolzenförmiges zweites Bauteil aufweist, das im elektrischen Kontakt mit dem ersten Bauteil bringbar ist und wobei ein außerhalb des Gehäuses liegender Abschnitt des zweiten Bauteils Mittel aufweist zur Verbindung mit einer Leiterklemme, dadurch gekennzeichnet, daß das erste Bauteil (16b) einen mit der Leiterplatte verbindbaren ersten Abschnitt (36b) und einen zylindrischen zweiten Abschnitt (50) aufweist und das zweite Bauteil (18b) in einem ersten Endbereich eine axiale Bohrung (52) aufweist, wodurch mit dem zweiten Abschnitt (50) des zweiten Bauteils (16b) eine Presspassung gebildet wird.Power connection for a power and control unit of a battery-powered industrial truck, wherein the power and control unit comprises a printed circuit board within a housing, the power connector having a first connectable to the circuit board component and an isolated led out of the housing bolt-shaped second component which in electrical contact with the first component can be brought and wherein a lying outside the housing portion of the second component comprises means for connection with a conductor terminal, characterized in that the first component (16b) has a first portion (36b) which can be connected to the printed circuit board and a cylindrical second portion (50), and the second component (18b) has an axial bore (52) in a first end region having, with the second portion (50) of the second component (16 b) is formed a press fit. Stromanschluß nach Anspruch 1, dadurch gekennzeichnet, daß an dem außerhalb des Gehäuses (12) liegenden Abschnitt des zweiten Bauteils (18) Schlüsselflächen (34, 34a) angebracht sind.Power connection according to claim 1, characterized in that on the outside of the housing (12) lying portion of the second component (18), key surfaces (34, 34a) are mounted. Stromanschluß nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die erste Kontaktfläche von einem zwischen dem ersten und zweiten Abschnitt (36, 40) liegenden konischen dritten Abschnitt (38) gebildet ist und das zweite Bauteil (18, 18a) im Endbereich der axialen Bohrung (28) eine komplementäre Konusfläche (30) aufweist.A power supply according to claim 1 or 3, characterized in that the first contact surface is formed by a conical third section (38) located between the first and second sections (36, 40) and the second component (18, 18a) is formed in the end region of the axial bore (28) has a complementary cone surface (30). Stromanschluß nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Bauteil (18, 18a, 18b) aus weicherem Werkstoff als das erste Bauteil (16, 16b) besteht.Power connection according to one of Claims 1 to 4, characterized in that the component (18, 18a, 18b) is made of a softer material than the first component (16, 16b). Stromanschluß nach Anspruch 5, dadurch gekennzeichnet, daß das Bauteil (18, 18a) aus Aluminium und das erste Bauteil aus Messing, vorzugsweise versilbertes Messing, geformt ist.Power connection according to Claim 5, characterized in that the component (18, 18a) is formed from aluminum and the first component from brass, preferably silver-plated brass. Stromanschluß nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das erste Bauteil (16) eine axiale Durchbohrung (42) aufweist.Power connection according to one of claims 1 to 6, characterized in that the first component (16) has an axial through bore (42). Stromanschluß nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das bolzenförmige zweite Bauteil (18, 18a, 18b) im wesentlichen zylindrisch geformt ist.Power connection according to one of claims 1 to 7, characterized in that the bolt-shaped second component (18, 18a, 18b) is substantially cylindrically shaped.
EP06003334A 2005-03-26 2006-02-18 Power connection for a power control unit of a battery driven lift truck Active EP1705751B1 (en)

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Also Published As

Publication number Publication date
CN1838485A (en) 2006-09-27
EP1705751B1 (en) 2011-08-17
US20060216971A1 (en) 2006-09-28
US7226322B2 (en) 2007-06-05
DE102005013953A1 (en) 2006-09-28
CN100440620C (en) 2008-12-03

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