EP2993741A1 - Control device for an electric tool - Google Patents

Control device for an electric tool Download PDF

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Publication number
EP2993741A1
EP2993741A1 EP15175083.3A EP15175083A EP2993741A1 EP 2993741 A1 EP2993741 A1 EP 2993741A1 EP 15175083 A EP15175083 A EP 15175083A EP 2993741 A1 EP2993741 A1 EP 2993741A1
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EP
European Patent Office
Prior art keywords
power
control device
plug
power tool
tool
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
EP15175083.3A
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German (de)
French (fr)
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EP2993741B1 (en
Inventor
Zoltan Cer
Joachim Schadow
Thomas Schomisch
Manfred Lutz
Klaus Dengler
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP2993741A1 publication Critical patent/EP2993741A1/en
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Publication of EP2993741B1 publication Critical patent/EP2993741B1/en
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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
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6658—Structural association with built-in electrical component with built-in electronic circuit on printed circuit board

Definitions

  • the invention relates to a control device for a power tool.
  • the invention further relates to a method for producing a control device for a power tool.
  • On hand-held power tools electronic circuits are used to control an engine depending on operating conditions. Usually, such electronic circuits are arranged in the interior of the power tool and therefore require space of the power tool, which can increase its overall size.
  • An object of the invention is to provide an improved control device for a power tool.
  • the object is achieved according to a first aspect with a control device for a power tool, comprising a circuit board with an electronic power component arranged thereon.
  • the control device is characterized in that the circuit board is arranged in a power plug of the power tool.
  • the power tool can be made smaller thereby and it can environment components (eg an electronics housing, potting compound, etc.) can be saved for the control device, because said environmental components are largely provided by the power plug.
  • environment components eg an electronics housing, potting compound, etc.
  • control device provides that means for dissipating thermal energy from the power component are provided. In this way, overheating of the power device in the power plug can be largely avoided during operation of the power tool.
  • control device is characterized in that the power component is at least partially connected directly or by means of a plantettell with a strand of a power cable. In this way, thermal energy can be easily dissipated from the power component into the power cord of the power tool.
  • control device is characterized in that the heat-conducting connection is soldered or riveted or screwed to the strand. In this way, different technical possibilities for dissipating heat of the power component are advantageously provided.
  • control device provides that a heat sink is arranged on the power component. As a result, thermal energy can advantageously be dissipated to a greater extent by the control device.
  • control device is characterized in that the heat sink is riveted to the power component or is applied by encapsulation with a potting compound on the power component. Also in this way different variants of an effective heat dissipation from the power device can be realized.
  • control device provides that the heat sink has elevations which extend into openings in the power plug. In this way, a solution for more powerful devices can be realized, which allows to dissipate more heat. This can be advantageous for overload operation of the power tool or for short-term storage of heat in the heat sink.
  • control device has a thermally conductive plastic. In this way it is possible, for example, to realize a heat dissipation device in an injection molding of the power plug.
  • a further embodiment of the control device is characterized in that the plastic has integrally formed cooling ribs. In this way, an enlargement of the surface of the power plug and thus an increased amount of dissipated heat can be achieved in a simple manner.
  • control device provides that the board can be connected to components of the power tool via a data connection.
  • functional communication between the board and the power device and the power tool can be provided. For example, this may be useful to query a tool temperature or other characteristics of the power tool through the board.
  • Fig. 1 shows in a lower view, a power tool 200 (for example, an angle grinder) with partially open housing.
  • a conventional control device 100 can be seen, which has a potting compound, under which an electronic module, ie a circuit board 10 with a power component 20 and optionally further electronic components are arranged (not visible).
  • an electronic module ie a circuit board 10 with a power component 20 and optionally further electronic components are arranged (not visible).
  • a circuit board 10 or printed circuit board with a power component 20 can be seen, it being apparent that an order of magnitude of the board 10 of the upper illustration by about two to three is smaller than an electronic module or a board 10 of the conventional control device 100 of the lower figure.
  • Fig. 2 shows in two representations a comparison of a conventional electrical power plug 30 with a power line or a power cord 40 and said board 10, from which it can be seen that due to the size relations, the board 10 can be completely housed within the power plug 30.
  • the two representations of Fig. 2 are only qualitative to look at, for example, dimensions and orientations of the three contact lugs or board connector of the board 10 does not necessarily have to correspond to the actual requirements for insertion into the power plug 30.
  • Fig. 3 shows a first embodiment of the control device 100 according to the invention.
  • the control device 100 comprises a power plug 30 with plug pins 31 and a power cord 40, via which a power tool 200 (not shown) is supplied from an electrical network with electrical energy.
  • a circuit board or printed circuit board 10 is provided on which an electronic power element 20 (for example in the form of a triac for motor control) is arranged.
  • the power device 20 is completely disposed within the power plug 30, for example, encapsulated with potting compound.
  • a functional communication of the circuit board 10 and / or the power device 20 may be provided with the power tool 200. This can be done, for example, that due to increased power consumption of the power tool 200, an increased electrical current from the power device 20 is detected and from a switched-state of the power tool 200 is derived.
  • engine control functions that require, for example, a detection of engine temperature and / or other engine characteristics or communication with components of the power tool 200 (eg, an on / off switch)
  • one or more communication or control lines in Power cord 40 are arranged (not shown).
  • a wireless communication between the power tool 200 and the board 10 may be provided with the power device 20.
  • the circuit board 10 is provided with the power device 20 mainly to a control of the power tool 200, the power device 20 switches under certain circumstances, the full electrical operating current of the motor of the power tool 200. It may therefore be beneficial to provide a heat dissipation for power tools 200 with higher power in order to avoid overheating and thus damage to the power device 20.
  • a cover structure in the housing of the power plug 30 is provided. For example, this may be formed in the plug housing lattice-shaped, with resulting openings 32 for heat escape.
  • FIGS. 5a and 5b shows such openings 32.
  • the connector housing is equipped with an additional function, which provides two hooks 33 as cable holding aids at the cable exit end, which facilitate the winding and holding together of the power cord 40 to the power tool 200.
  • Such power plug 30 with additional function usually have slightly larger external dimensions and are therefore particularly suitable to receive a board 10 inside.
  • a particularly large heat sink 60 for power tools 200 with particularly high engine power can also advantageously be accommodated here.
  • Fig. 6a 1 shows an embodiment of the heat sink 60 as a specific shaped sheet metal plate ("heatsink").
  • a heat sink 60 with a larger surface with similar expansions possible, for example, a cost-producible aluminum extruded profile with ribs 61, as in principle Fig. 6b shown.
  • the ribs 61 extend into the openings 32 in the connector housing, as in FIG Fig. 7a shown. As a result, they are able to release heat to the ambient air, but are slightly sunk with respect to the overall outer contour of the connector housing, which causes protection of the user from burns due to overheated heat sink 60. Visible is the sinking of the ribs 61 relative to the outer contour of the power plug 30 in Fig. 7b , which is a top view of the control device 100 of FIG Fig. 7a shows.
  • the plug housing of the power plug 30 is at least partially formed of thermally conductive plastic, which has the required insulating properties against the internally guided electrical mains voltage.
  • Fig. 8 shows such a variant, wherein the power plug 30 is made entirely of thermally conductive plastic.
  • the board 10 is in this case equally, as it is known for power cord 40 and plug pins 31, embedded in this plastic.
  • the heat can be dissipated from the power component 20 via the thermally conductive plastic to the ambient air.
  • Known molding processes for plastics processing such as injection molding offer a variety of possibilities for shaping.
  • it may be provided to enlarge the outer surface of the mains plug 30 by ribs 34, whereby a further improved heat dissipation is provided.
  • Fig. 9 indicated variant of the control device 100, it is possible to manufacture the main portion of the power plug 30 of conventional plastic and to overmold only the board 10 with the power component 20 with the heat-conducting plastic. This is possible, for example, in a two-component injection molding process for cases where special material properties are required. As a result, a higher elasticity can be achieved on the overall housing, for example for realizing an elastic region for a cable bending grommet of the mains plug 30.
  • the difference between the heat-conducting plastic and the conventional plastic is indicated by different hatchings.
  • Fig. 10 schematically shows a power tool 200 with a control device 100.
  • Fig. 11 shows in principle a sequence of a method for producing a control device 100 for a power tool 200.
  • a power component 20 is arranged on a circuit board 10.
  • a second step S2 the circuit board 10 is arranged in a power plug 30 for the power tool 200.
  • the present invention proposes a control device integrated in a power plug with a power component for a power tool.
  • This is due to the miniaturized electronic assembly with SMD components in a simple manner possible, with respect to the conventional realization casting compound can be saved within the power tool, which means space gain in the power tool, which are built as a result, smaller.
  • advantageous peripheral components can be saved, such as a component cup for the power device.
  • the integration of the board according to the invention in any type of network plug used is possible, with a shape of the plug housing and a number of connector pins are arbitrary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

Steuervorrichtung (100) für ein Elektrowerkzeug (200), aufweisend eine Platine (10) mit einem darauf angeordneten elektronischen Leistungsbauelement (20), dadurch gekennzeichnet, dass die Platine (10) in einem Netzstecker (30) des Elektrowerkzeugs (200) angeordnet ist.Control device (100) for a power tool (200), comprising a circuit board (10) with an electronic power component (20) arranged thereon, characterized in that the circuit board (10) is arranged in a power plug (30) of the power tool (200).

Description

Die Erfindung betrifft eine Steuervorrichtung für ein Elektrowerkzeug. Die Erfindung betrifft ferner ein Verfahren zum Herstellen einer Steuervorrichtung für ein Elektrowerkzeug.The invention relates to a control device for a power tool. The invention further relates to a method for producing a control device for a power tool.

Stand der TechnikState of the art

An handgeführten Elektrowerkzeugen werden zu einer Steuerung eines Motors in Abhängigkeit von Betriebszuständen elektronische Schaltungen eingesetzt. Üblicherweise sind derartige elektronische Schaltungen im Inneren des Elektrowerkzeugs angeordnet und benötigen daher Bauraum des Elektrowerkzeugs, was seine Gesamtabmessung vergrößern kann.On hand-held power tools electronic circuits are used to control an engine depending on operating conditions. Usually, such electronic circuits are arranged in the interior of the power tool and therefore require space of the power tool, which can increase its overall size.

Offenbarung der ErfindungDisclosure of the invention

Eine Aufgabe der Erfindung ist es, eine verbesserte Steuervorrichtung für ein Elektrowerkzeug bereitzustellen.An object of the invention is to provide an improved control device for a power tool.

Die Aufgabe wird gemäß einem ersten Aspekt gelöst mit einer Steuervorrichtung für ein Elektrowerkzeug, aufweisend eine Platine mit einem darauf angeordneten elektronischen Leistungsbauelement. Die Steuervorrichtung ist dadurch gekennzeichnet, dass die Platine in einem Netzstecker des Elektrowerkzeugs angeordnet ist. Vorteilhaft kann das Elektrowerkzeug dadurch kleiner ausgebildet werden und es können Umgebungsbauteile (z.B. ein Elektronikgehäuse, Vergußmasse, usw.) für die Steuervorrichtung eingespart werden, weil die genannten Umgebungsbauteile großteils vom Netzstecker bereitgestellt werden. Im Ergebnis ist dadurch eine platz- und kostensparende Ansteuervorrichtung für das Elektrowerkzeug realisierbar.The object is achieved according to a first aspect with a control device for a power tool, comprising a circuit board with an electronic power component arranged thereon. The control device is characterized in that the circuit board is arranged in a power plug of the power tool. Advantageously, the power tool can be made smaller thereby and it can environment components (eg an electronics housing, potting compound, etc.) can be saved for the control device, because said environmental components are largely provided by the power plug. As a result, a space-saving and cost-saving drive device for the power tool can be realized.

Die Aufgabe wird gemäß einem zweiten Aspekt gelöst mit einem Verfahren zum Herstellen einer Steuervorrichtung für ein Elektrowerkzeug aufweisend die Schritte:

  • Anordnen eines Leistungsbauelements auf einer Platine; und
  • Anordnen der Platine in einem Netzstecker für das Elektrowerkzeug.
The object is achieved according to a second aspect with a method for producing a control device for a power tool comprising the steps:
  • Arranging a power device on a board; and
  • Arranging the board in a mains plug for the power tool.

Vorteilhafte Weiterbildungen der Steuervorrichtung sind Gegenstand von Unteransprüchen.Advantageous developments of the control device are the subject of dependent claims.

Eine vorteilhafte Weiterbildung der Steuervorrichtung sieht vor, dass Mittel zum Abführen von thermischer Energie vom Leistungsbauelement vorgesehen sind. Auf diese Weise kann im Betrieb des Elektrowerkzeugs eine Überhitzung des Leistungsbauelements im Netzstecker weitestgehend vermieden werden.An advantageous development of the control device provides that means for dissipating thermal energy from the power component are provided. In this way, overheating of the power device in the power plug can be largely avoided during operation of the power tool.

Eine weitere vorteilhafte Weiterbildung der Steuervorrichtung ist dadurch gekennzeichnet, dass das Leistungsbauelement wenigstens abschnittsweise direkt oder mittels einer Wärmeleitverbindung mit einer Litze eines Netzkabels verbunden ist. Auf diese Weise lässt sich auf einfache Weise thermische Energie vom Leistungsbauelement in das Netzkabel des Elektrowerkzeugs abführen.A further advantageous development of the control device is characterized in that the power component is at least partially connected directly or by means of a Wärmeleitverbindung with a strand of a power cable. In this way, thermal energy can be easily dissipated from the power component into the power cord of the power tool.

Eine weitere vorteilhafte Weiterbildung der Steuervorrichtung zeichnet sich dadurch aus, dass die Wärmeleitverbindung mit der Litze verlötet oder vernietet oder verschraubt ist. Auf diese Weise werden vorteilhaft unterschiedliche technische Möglichkeiten für ein Abführen von Wärme des Leistungsbauelements bereitgestellt.A further advantageous development of the control device is characterized in that the heat-conducting connection is soldered or riveted or screwed to the strand. In this way, different technical possibilities for dissipating heat of the power component are advantageously provided.

Eine weitere vorteilhafte Weiterbildung der Steuervorrichtung sieht vor, dass auf dem Leistungsbauelement ein Kühlkörper angeordnet ist. Dadurch kann vorteilhaft thermische Energie in erhöhtem Ausmaß von der Steuervorrichtung abgeführt werden.A further advantageous development of the control device provides that a heat sink is arranged on the power component. As a result, thermal energy can advantageously be dissipated to a greater extent by the control device.

Eine weitere vorteilhafte Weiterbildung der Steuervorrichtung ist dadurch gekennzeichnet, dass der Kühlkörper mit dem Leistungsbauelement vernietet oder durch Umspritzen mit einer Vergußmasse am Leistungsbauteil anliegend ist. Auch auf diese Weise können unterschiedliche Varianten einer effektiven Wärmeabfuhr vom Leistungsbauelement realisiert werden.A further advantageous development of the control device is characterized in that the heat sink is riveted to the power component or is applied by encapsulation with a potting compound on the power component. Also in this way different variants of an effective heat dissipation from the power device can be realized.

Eine weitere vorteilhafte Weiterbildung der Steuervorrichtung sieht vor, dass der Kühlkörper Erhebungen aufweist, die sich in Öffnungen im Netzstecker erstrecken. Auf diese Weise kann eine Lösung für leistungsfähigere Geräte realisiert werden, die es erlaubt, noch mehr Wärme abzuführen. Dies kann für einen Überlastbetrieb des Elektrowerkzeugs oder für eine kurzzeitige Speicherung von Wärme im Kühlkörper vorteilhaft sein.A further advantageous development of the control device provides that the heat sink has elevations which extend into openings in the power plug. In this way, a solution for more powerful devices can be realized, which allows to dissipate more heat. This can be advantageous for overload operation of the power tool or for short-term storage of heat in the heat sink.

Eine weitere vorteilhafte Weiterbildung der Steuervorrichtung sieht vor, dass der Netzstecker einen wärmeleitfähigen Kunststoff aufweist. Auf diese Weise ist es möglich, beispielsweise in einem Spritzgießverfahren des Netzsteckers eine Wärmeabführungseinrichtung zu realisieren.A further advantageous development of the control device provides that the power plug has a thermally conductive plastic. In this way it is possible, for example, to realize a heat dissipation device in an injection molding of the power plug.

Eine weitere Ausführungsform der Steuervorrichtung ist dadurch gekennzeichnet, dass der Kunststoff integral ausgebildete Kühlrippen aufweist. Auf diese Weise kann auf einfache Weise eine Vergrößerung der Oberfläche des Netzsteckers und damit ein erhöhtes Ausmaß von abgeführter Wärme erreicht werden.A further embodiment of the control device is characterized in that the plastic has integrally formed cooling ribs. In this way, an enlargement of the surface of the power plug and thus an increased amount of dissipated heat can be achieved in a simple manner.

Eine vorteilhafte Weiterbildung der Steuervorrichtung sieht vor, dass die Platine mit Komponenten des Elektrowerkzeugs über eine Datenverbindung verbindbar ist. Auf diese Weise kann eine funktionale Kommunikation zwischen der Platine und dem Leistungsbauelement und dem Elektrowerkzeug bereitgestellt werden. Beispielweise kann dies zu einer Abfrage einer Werkzeugtemperatur oder weiterer Kenngrößen des Elektrowerkzeugs durch die Platine sinnvoll sein.An advantageous development of the control device provides that the board can be connected to components of the power tool via a data connection. In this way, functional communication between the board and the power device and the power tool can be provided. For example, this may be useful to query a tool temperature or other characteristics of the power tool through the board.

Die Erfindung wird im Folgenden mit weiteren Merkmalen und Vorteilen anhand von mehreren Figuren im Detail beschrieben. Dabei bilden alle beschriebenen Merkmale, unabhängig von ihrer Darstellung in der Beschreibung bzw. in den Figuren und unabhängig von ihrer Rückbeziehung in den Patentansprüchen den Gegenstand der Erfindung. Die Figuren sind nicht notwendiger Weise maßstabsgetreu ausgeführt und sind insbesondere zu einer qualitativen und prinzipiellen Erläuterung der Erfindung gedacht.The invention will be described below with further features and advantages with reference to several figures in detail. In this case, all the features described, regardless of their representation in the description or in the figures and regardless of their relationship in the claims the subject of the invention. The figures are not necessary executed true to scale and are intended in particular for a qualitative and basic explanation of the invention.

In den Figuren zeigt:

Fig. 1
Darstellungen eines herkömmlichen Elektrowerkzeugs und einer Platine mit einem Leistungsbauelement;
Fig. 2
Darstellungen eines Netzsteckers und einer Platine mit einem Leistungsbauelement;
Fig. 3
eine prinzipielle Darstellung einer Ausführungsform der erfindungsgemäßen Steuervorrichtung;
Fig. 4
eine weitere Ausführungsform der erfindungsgemäßen Steuervorrichtung;
Fig. 5a, 5b
eine weitere Ausführungsform der erfindungsgemäßen Steuervorrichtung;
Fig. 6a, 6b
Kühleinrichtungen für die erfindungsgemäße Steuervorrichtung;
Fig. 7a, 7b
eine weitere Ausführungsform der erfindungsgemäßen Steuervorrichtung;
Fig. 8
eine weitere Ausführungsform der erfindungsgemäßen Steuervorrichtung;
Fig. 9
eine weitere Ausführungsform der erfindungsgemäßen Steuervorrichtung;
Fig. 10
ein prinzipielles Blockschaltbilde eines Elektrowerkzeugs mit einer Steuervorrichtung; und
Fig. 11
einen prinzipiellen Ablauf eines Verfahrens zum Herstellen der Steuervorrichtung.
In the figures shows:
Fig. 1
Representations of a conventional power tool and a circuit board with a power device;
Fig. 2
Representations of a power plug and a circuit board with a power device;
Fig. 3
a schematic representation of an embodiment of the control device according to the invention;
Fig. 4
a further embodiment of the control device according to the invention;
Fig. 5a, 5b
a further embodiment of the control device according to the invention;
Fig. 6a, 6b
Cooling devices for the control device according to the invention;
Fig. 7a, 7b
a further embodiment of the control device according to the invention;
Fig. 8
a further embodiment of the control device according to the invention;
Fig. 9
a further embodiment of the control device according to the invention;
Fig. 10
a schematic block diagram of a power tool with a control device; and
Fig. 11
a basic procedure of a method for producing the control device.

Beschreibung von AusführungsformenDescription of embodiments

Fig. 1 zeigt in einer unteren Darstellung ein Elektrowerkzeug 200 (beispielsweise ein Winkelschleifer) mit teilweise geöffnetem Gehäuse. Innerhalb einer Umrahmung ist eine herkömmliche Steuervorrichtung 100 erkennbar, die eine Vergußmasse aufweist, unter der eine Elektronikbaugruppe, d.h. eine Platine 10 mit einem Leistungsbauelement 20 und gegebenenfalls weiteren elektronischen Bauelementen angeordnet sind (nicht sichtbar). In einer oberen Darstellung von Fig. 1 ist eine Platine 10 bzw. Leiterplatte mit einem Leistungsbauelement 20 erkennbar, wobei erkennbar ist, dass eine Größenordnung der Platine 10 der oberen Darstellung um ca. zwei bis drei kleiner ist als ein Elektronikmodul bzw. eine Platine 10 der herkömmliche Steuervorrichtung 100 der unteren Abbildung. Fig. 1 shows in a lower view, a power tool 200 (for example, an angle grinder) with partially open housing. Within a frame, a conventional control device 100 can be seen, which has a potting compound, under which an electronic module, ie a circuit board 10 with a power component 20 and optionally further electronic components are arranged (not visible). In an upper illustration of Fig. 1 a circuit board 10 or printed circuit board with a power component 20 can be seen, it being apparent that an order of magnitude of the board 10 of the upper illustration by about two to three is smaller than an electronic module or a board 10 of the conventional control device 100 of the lower figure.

Fig. 2 zeigt in zwei Darstellungen einen Vergleich eines herkömmlichen elektrischen Netzsteckers 30 mit einer Netzleitung bzw. einem Netzkabel 40 und der genannten Platine 10, woraus ersichtlich ist, dass aufgrund der Größenrelationen die Platine 10 vollständig innerhalb des Netzsteckers 30 untergebracht werden kann. Die beiden Darstellungen von Fig. 2 sind dabei lediglich qualitativ anzusehen, wobei z.B. Abmessungen und Ausrichtungen der drei Kontaktfahnen bzw. Platinenstecker der Platine 10 nicht unbedingt den tatsächlichen Erfordernissen zur Einbringung in den Netzstecker 30 entsprechen müssen. Fig. 2 shows in two representations a comparison of a conventional electrical power plug 30 with a power line or a power cord 40 and said board 10, from which it can be seen that due to the size relations, the board 10 can be completely housed within the power plug 30. The two representations of Fig. 2 are only qualitative to look at, for example, dimensions and orientations of the three contact lugs or board connector of the board 10 does not necessarily have to correspond to the actual requirements for insertion into the power plug 30.

Fig. 3 zeigt eine erste Ausführungsform der erfindungsgemäßen Steuervorrichtung 100. Die Steuervorrichtung 100 umfasst einen Netzstecker 30 mit Steckerstiften 31 und einem Netzkabel 40, über das ein Elektrowerkzeug 200 (nicht dargestellt) aus einem elektrischen Netz mit elektrischer Energie versorgt wird. Erkennbar ist, dass eine Platine bzw. Leiterplatte 10 vorgesehen ist, auf der ein elektronisches Leistungselement 20 (z.B. in Form eines ein Triacs zur Motorsteuerung) angeordnet ist. Das Leistungsbauelement 20 ist vollständig innerhalb des Netzsteckers 30 angeordnet, beispielsweise mit Vergußmasse umspritzt. Fig. 3 shows a first embodiment of the control device 100 according to the invention. The control device 100 comprises a power plug 30 with plug pins 31 and a power cord 40, via which a power tool 200 (not shown) is supplied from an electrical network with electrical energy. It can be seen that a circuit board or printed circuit board 10 is provided on which an electronic power element 20 (for example in the form of a triac for motor control) is arranged. The power device 20 is completely disposed within the power plug 30, for example, encapsulated with potting compound.

Vorzugsweise kann eine funktionale Kommunikation der Platine 10 und/oder des Leistungsbauelements 20 mit dem Elektrowerkzeug 200 vorgesehen sein. Dies kann beispielsweise dadurch erfolgen, dass aufgrund von erhöhter Leistungsaufnahme des Elektrowerkzeugs 200 ein erhöhter elektrischer Strom vom Leistungsbauelement 20 erkannt wird und daraus ein eingeschalteter Zustand des Elektrowerkzeugs 200 abgeleitet wird. Alternativ ist es auch möglich, dass für Motorsteuerfunktionen, die beispielsweise eine Erfassung von Motortemperatur und/oder anderen Motorkenngrößen bzw. eine Kommunikation mit Komponenten des Elektrowerkzeugs 200 (z.B. einem Ein/Aus-Schalter) erfordern, eine oder mehrere Kommunikations- bzw. Steuerleitungen im Netzkabel 40 angeordnet sind (nicht dargestellt). Alternativ kann für die Zwecke der genannten Kommunikation auch eine drahtlose Kommunikation zwischen dem Elektrowerkzeug 200 und der Platine 10 mit dem Leistungsbauelement 20 vorgesehen sein.Preferably, a functional communication of the circuit board 10 and / or the power device 20 may be provided with the power tool 200. This can be done, for example, that due to increased power consumption of the power tool 200, an increased electrical current from the power device 20 is detected and from a switched-state of the power tool 200 is derived. Alternatively, it is also possible that for engine control functions that require, for example, a detection of engine temperature and / or other engine characteristics or communication with components of the power tool 200 (eg, an on / off switch), one or more communication or control lines in Power cord 40 are arranged (not shown). Alternatively, for the purposes of said communication, a wireless communication between the power tool 200 and the board 10 may be provided with the power device 20.

Da die Platine 10 mit dem Leistungsbauelement 20 vor allem zu einer Steuerung des Elektrowerkzeugs 200 vorgesehen ist, schaltet das Leistungsbauelement 20 unter Umständen den vollen elektrischen Betriebsstrom des Motors des Elektrowerkzeugs 200. Es kann daher günstig sein, für Elektrowerkzeuge 200 mit höherer Leistung eine Wärmeabfuhr vorzusehen, um eine Überhitzung und damit Schädigung des Leistungsbauelements 20 zu vermeiden.Since the circuit board 10 is provided with the power device 20 mainly to a control of the power tool 200, the power device 20 switches under certain circumstances, the full electrical operating current of the motor of the power tool 200. It may therefore be beneficial to provide a heat dissipation for power tools 200 with higher power in order to avoid overheating and thus damage to the power device 20.

Hierzu ist in der in Fig. 4 prinzipiell dargestellten Ausführungsform der Steuervorrichtung 100 vorgesehen, dass die Wärme vom Leistungsbauelement 20 auf ein Leitungsmetall (in der Regel Kupfer bzw. Litze aus Kupfer) des Netzkabels 40 abgeführt wird. Mittels einer Wärmeleitverbindung 50 ist dies beispielsweise dadurch möglich, dass das Leistungsbauelement 20 mit einer abisolierten Litze des Netzkabels 40 verbunden wird, z.B. mittels einer Lötverbindung. Alternativ ist auch denkbar, die genannte Wärmeleitverbindung 50 mittels einer Nietung oder einer Verschraubung des Leistungsbauelements 20 mit der Litze des Netzkabels 40 zu realisieren.This is in the in Fig. 4 In principle illustrated embodiment of the control device 100 is provided that the heat from the power component 20 to a metal line (usually copper or strand of copper) of the power cord 40 is dissipated. By means of a Wärmeleitverbindung 50 this is for example possible because the power device 20 is connected to a stripped strand of the power cord 40, for example by means of a solder joint. Alternatively, it is also conceivable to realize said heat conduction connection 50 by means of a riveting or screwing of the power component 20 to the strand of the power cable 40.

Alternativ kann zu einer Wärmeabfuhr auch vorgesehen sein, die Wärme vom Leistungsbauelement 20 auf ein Kühlblech bzw. einen Kühlkörper 60 und in weiterer Folge an die Umgebungsluft abzuführen. Damit nicht Finger eines Benutzers beim Ziehen des Netzsteckers 30 mit dem heiß gewordenen Kühlkörper 60 in Berührung kommen können, wird eine Abdeckstruktur im Gehäuse des Netzsteckers 30 vorgesehen. Beispielsweise kann diese im Steckergehäuse gitterförmig, mit resultierenden Öffnungen 32 zum Wärmeaustritt ausgebildet sein.Alternatively, it can also be provided for heat removal to dissipate the heat from the power component 20 to a cooling plate or a heat sink 60 and subsequently to the ambient air. So do not finger one User when pulling the power plug 30 with the heat sink become hot 60 can come into contact, a cover structure in the housing of the power plug 30 is provided. For example, this may be formed in the plug housing lattice-shaped, with resulting openings 32 for heat escape.

Das Ausführungsbeispiel der Figuren 5a und 5b zeigt derartige Öffnungen 32. Erkennbar ist außerdem, dass das Steckergehäuse mit einer Zusatzfunktion ausgestattet ist, welches am Kabelaustrittsende zwei Haken 33 als Kabelhaltehilfen vorsieht, die das Aufwickeln und Zusammenhalten des Netzkabels 40 zum Elektrowerkzeug 200 erleichtern. Derartige Netzstecker 30 mit Zusatzfunktion haben in der Regel etwas größere Außenabmessungen und sind deshalb besonders geeignet, um im Inneren eine Platine 10 aufzunehmen. Auch lässt sich hier vorteilhaft ein besonders großer Kühlkörper 60 für Elektrowerkzeuge 200 mit besonders hoher Motorleistung unterbringen.The embodiment of FIGS. 5a and 5b shows such openings 32. It can also be seen that the connector housing is equipped with an additional function, which provides two hooks 33 as cable holding aids at the cable exit end, which facilitate the winding and holding together of the power cord 40 to the power tool 200. Such power plug 30 with additional function usually have slightly larger external dimensions and are therefore particularly suitable to receive a board 10 inside. A particularly large heat sink 60 for power tools 200 with particularly high engine power can also advantageously be accommodated here.

Fig. 6a ein zeigt eine Ausführungsform des Kühlkörpers 60 als eine spezifisch geformte Blechplatte ("Kühlblech"). Falls das ebene Kühlblech von Fig. 6a bei gegebenem Einbauraum zu wenig Oberfläche zur Wärmeableitung aufweist, ist alternativ ein Kühlkörper 60 mit einer größeren Oberfläche bei ähnlichen Ausdehnungen möglich, beispielsweise ein kostengünstig herstellbares Aluminium-Strangpressprofil mit Rippen 61, wie prinzipiell in Fig. 6b dargestellt. Die Rippen 61 erstrecken sich in die Öffnungen 32 im Steckergehäuse, wie in Fig. 7a dargestellt. Dadurch sind sie in der Lage, Wärme an die Umgebungsluft abzugeben, sind jedoch bezüglich der Gesamtaußenkontur des Steckergehäuses geringfügig versenkt, was einen Schutz des Benutzers vor Verbrennungen aufgrund eines überhitzten Kühlkörpers 60 bewirkt. Erkennbar ist die Versenkung der Rippen 61 gegenüber der Außenkontur des Netzsteckers 30 in Fig. 7b, die eine Aufsicht der Steuervorrichtung 100 von Fig. 7a zeigt. Fig. 6a 1 shows an embodiment of the heat sink 60 as a specific shaped sheet metal plate ("heatsink"). If the flat cooling plate of Fig. 6a With a given installation space too little surface for heat dissipation has, alternatively, a heat sink 60 with a larger surface with similar expansions possible, for example, a cost-producible aluminum extruded profile with ribs 61, as in principle Fig. 6b shown. The ribs 61 extend into the openings 32 in the connector housing, as in FIG Fig. 7a shown. As a result, they are able to release heat to the ambient air, but are slightly sunk with respect to the overall outer contour of the connector housing, which causes protection of the user from burns due to overheated heat sink 60. Visible is the sinking of the ribs 61 relative to the outer contour of the power plug 30 in Fig. 7b , which is a top view of the control device 100 of FIG Fig. 7a shows.

In einer weiteren Ausführungsform der Steuervorrichtung 100 ist auch denkbar, dass das Steckergehäuse des Netzsteckers 30 wenigstens teilweise aus wärmeleitfähigem Kunststoff gebildet ist, der die erforderlichen isolierenden Eigenschaften gegenüber der innen geführten elektrischen Netzspannung aufweist.In a further embodiment of the control device 100 is also conceivable that the plug housing of the power plug 30 is at least partially formed of thermally conductive plastic, which has the required insulating properties against the internally guided electrical mains voltage.

Fig. 8 zeigt eine derartige Variante, wobei der Netzstecker 30 vollständig aus wärmeleitfähigem Kunststoff ausgeführt ist. Die Platine 10 ist in diesem Fall gleichermaßen, wie es für Netzkabel 40 und für Steckerstifte 31 bekannt ist, in diesem Kunststoff eingebettet. Auf diese Weise kann die Wärme vom Leistungsbauelement 20 über den wärmeleitfähigen Kunststoff an die Umgebungsluft abgeführt werden. Bekannte formgebende Verfahren zur Kunststoffverarbeitung, wie z.B. Spritzguss bieten vielfältige Möglichkeiten zur Formgebung. Optional kann vorgesehen sein, die Außenfläche des Netzsteckers 30 durch Rippen 34 zu vergrößern, wodurch eine nochmals verbesserte Wärmeabfuhr bereitgestellt ist. Fig. 8 shows such a variant, wherein the power plug 30 is made entirely of thermally conductive plastic. The board 10 is in this case equally, as it is known for power cord 40 and plug pins 31, embedded in this plastic. In this way, the heat can be dissipated from the power component 20 via the thermally conductive plastic to the ambient air. Known molding processes for plastics processing, such as injection molding offer a variety of possibilities for shaping. Optionally, it may be provided to enlarge the outer surface of the mains plug 30 by ribs 34, whereby a further improved heat dissipation is provided.

In einer in Fig. 9 angedeuteten Variante der Steuervorrichtung 100 ist es möglich, den Hauptanteil des Netzsteckers 30 aus herkömmlichem Kunststoff zu fertigen und nur die Platine 10 mit dem Leistungsbauteil 20 mit dem wärmeleitenden Kunststoff zu umspritzen. Dies ist beispielsweise in einem Zweikomponenten-Spritzgießverfahren für Fälle möglich, wo besondere Materialeigenschaften gefordert sind. Dadurch kann eine höhere Elastizität am Gesamtgehäuse, zum Beispiel zum Realisieren eines elastischen Bereichs für eine Kabelbiegetülle des Netzsteckers 30 erreicht werden. Angedeutet ist der Unterschied des wärmeleitenden Kunststoffs gegenüber dem herkömmlichen Kunststoff durch unterschiedliche Schraffuren.In an in Fig. 9 indicated variant of the control device 100, it is possible to manufacture the main portion of the power plug 30 of conventional plastic and to overmold only the board 10 with the power component 20 with the heat-conducting plastic. This is possible, for example, in a two-component injection molding process for cases where special material properties are required. As a result, a higher elasticity can be achieved on the overall housing, for example for realizing an elastic region for a cable bending grommet of the mains plug 30. The difference between the heat-conducting plastic and the conventional plastic is indicated by different hatchings.

Nachfolgend sind spezifische Elektronikfunktionen für Elektrowerkzeuge 200, die auf der Platine 10 im Netzstecker 30 integriert werden können, aufgelistet, wobei die Auflistung lediglich exemplarisch und keineswegs abschließend ist:

  • Wiederanlaufsperre, die es ermöglicht, dass das Elektrowerkzeug 200 nach dem Ziehen und Widereinstecken des Netzsteckers 30 nicht anläuft, auch wenn der Werkzeugschalter in "Ein"-Position arretiert ist
  • Sanftanlauf, der es ermöglicht, dass das Elektrowerkzeug 200 ohne Anlaufruck anläuft
  • Lastabhängige Motorsteuerung, die eine Drehzahl des Elektrowerkzeugs 200 (z.B. eine Bohrmaschine oder dgl.) unter Betriebslast nahezu konstant hält. Eine Regelgröße kann beispielsweise ein cos ϕ der elektrischen Netzspannung oder ein aufgenommener elektrischer Strom sein.
  • Motorschutz, der mittels einer gemessenen Stromaufnahme und einer Motorabschaltung bei Überlast realisiert wird
  • Ableitstromprüfung, die eine elektrische Spannungsverschleppung nach außen auf das Maschinengehäuse detektiert
Below are specific electronic functions for power tools 200 that can be integrated on the board 10 in the power plug 30, the list is only exemplary and by no means exhaustive:
  • Restart interlock that allows the power tool 200 to not start after pulling and reinserting the power plug 30 even when the tool switch is locked in the "on" position
  • Soft start, which allows the power tool 200 starts without start-up pressure
  • Load-dependent engine control, which keeps a speed of the power tool 200 (eg a drill or the like.) Under operating load almost constant. A Controlled variable can be, for example, a cos φ the electrical mains voltage or a recorded electric current.
  • Motor protection, which is realized by means of a measured current consumption and an engine shutdown in case of overload
  • Leakage current test, which detects an electrical voltage carryover to the outside of the machine housing

Fig. 10 zeigt schematisch ein Elektrowerkzeug 200 mit einer Steuervorrichtung 100. Fig. 10 schematically shows a power tool 200 with a control device 100.

Fig. 11 zeigt prinzipiell einen Ablauf eines Verfahrens zur Herstellung einer Steuervorrichtung 100 für ein Elektrowerkzeug 200. Fig. 11 shows in principle a sequence of a method for producing a control device 100 for a power tool 200.

In einem ersten Schritt S1 wird ein Leistungsbauelement 20 auf einer Platine 10 angeordnet.In a first step S1, a power component 20 is arranged on a circuit board 10.

In einem zweiten Schritt S2 wird die Platine 10 in einem Netzstecker 30 für das Elektrowerkzeug 200 angeordnet.In a second step S2, the circuit board 10 is arranged in a power plug 30 for the power tool 200.

Zusammenfassend wird mit der vorliegenden Erfindung eine in einem Netzstecker integrierte Steuervorrichtung mit einem Leistungsbauteil für ein Elektrowerkzeug vorgeschlagen. Dies ist aufgrund der miniaturisierten Elektronikbaugruppe mit SMD-Bauteilen auf einfache Weise möglich, wobei gegenüber der herkömmlichen Realisierung Vergußmasse innerhalb des Elektrowerkzeuge eingespart werden kann, was Bauraumgewinn im Elektrowerkzeug bedeutet, die im Ergebnis dadurch kleiner gebaut sind. Ferner können vorteilhaft periphere Bauteile eingespart werden, wie z.B. ein Bauteilbecher für das Leistungsbauelement. Im Ergebnis ist es dadurch möglich, eine kostenoptimierte Fertigung von Elektrowerkzeugen bereitzustellen. Vorteilhaft ist die erfindungsgemäße Integration der Platine in jeglichen verwendeten Netzsteckertypen möglich, wobei eine Form des Steckergehäuses und eine Anzahl von Steckerstiften beliebig sind.In summary, the present invention proposes a control device integrated in a power plug with a power component for a power tool. This is due to the miniaturized electronic assembly with SMD components in a simple manner possible, with respect to the conventional realization casting compound can be saved within the power tool, which means space gain in the power tool, which are built as a result, smaller. Furthermore, advantageous peripheral components can be saved, such as a component cup for the power device. As a result, it is possible to provide a cost-optimized production of power tools. Advantageously, the integration of the board according to the invention in any type of network plug used is possible, with a shape of the plug housing and a number of connector pins are arbitrary.

Obwohl die Erfindung vorangehend mit konkreten Ausführungsbeispielen beschrieben wurde, ist sie keinesfalls darauf beschränkt. Der Fachmann wird die Möglichkeit einer nahezu unbegrenzten Anzahl von Ausführungsformen erkennen und deshalb vorangehend auch nicht oder nur teilweise offenbarte Ausführungsbeispiele gemäß den erfindungsgemäßen Prinzipien realisieren.Although the invention has been described above with specific embodiments, it is by no means limited thereto. The person skilled in the art will recognize the possibility of a virtually unlimited number of embodiments and therefore also implement embodiments that are not or only partially disclosed according to the inventive principles.

Claims (13)

Steuervorrichtung (100) für ein Elektrowerkzeug (200), aufweisend eine Platine (10) mit einem darauf angeordneten elektronischen Leistungsbauelement (20), dadurch gekennzeichnet, dass die Platine (10) in einem Netzstecker (30) des Elektrowerkzeugs (200) angeordnet ist.Control means (100) for a power tool (200) comprising a circuit board (10) having disposed thereon the electronic power component (20), characterized in that the plate (10) in a plug (30) of the power tool (200) is arranged. Steuervorrichtung (100) nach Anspruch 1, dadurch gekennzeichnet, dass Mittel zum Abführen von thermischer Energie vom Leistungsbauelement (10) vorgesehen sind.Control device (100) according to claim 1, characterized in that means for dissipating thermal energy from the power device (10) are provided. Steuervorrichtung (100) nach Anspruch 2, dadurch gekennzeichnet, dass das Leistungsbauelement (20) wenigstens abschnittsweise direkt oder mittels einer Wärmeleitverbindung (50) mit einer Litze eines Netzkabels (40) verbunden ist.Control device (100) according to claim 2, characterized in that the power component (20) is at least partially connected directly or by means of a Wärmeleitverbindung (50) with a strand of a power cable (40). Steuervorrichtung (100) nach Anspruch 3, dadurch gekennzeichnet, dass die Wärmeleitverbindung (50) mit der Litze verlötet oder vernietet oder verschraubt ist.Control device (100) according to claim 3, characterized in that the heat-conducting connection (50) is soldered or riveted or screwed to the strand. Steuervorrichtung (100) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass auf dem Leistungsbauelement (10) ein Kühlkörper (60) angeordnet ist.Control device (100) according to one of claims 2 to 4, characterized in that a heat sink (60) is arranged on the power component (10). Steuervorrichtung (100) nach Anspruch 5, dadurch gekennzeichnet, dass der Kühlkörper (60) mit dem Leistungsbauelement (20) vernietet oder durch Umspritzen mit einer Vergußmasse am Leistungsbauteil (10) anliegend ist.Control device (100) according to claim 5, characterized in that the heat sink (60) riveted to the power component (20) or by encapsulation with a potting compound on the power component (10) is present. Steuervorrichtung (100) nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Kühlkörper (60) Erhebungen (61) aufweist, die sich in Öffnungen (32) im Netzstecker (30) erstrecken.Control device (100) according to claim 5 or 6, characterized in that the cooling body (60) has projections (61) which extend into openings (32) in the mains plug (30). Steuervorrichtung (100) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Netzstecker (30) einen wärmeleitfähigen Kunststoff aufweist.Control device (100) according to one of the preceding claims,
characterized in that the power plug (30) comprises a thermally conductive plastic. Steuervorrichtung (100) nach Anspruch 8, dadurch gekennzeichnet, dass der Kunststoff integral ausgebildete Kühlrippen (34) aufweist.Control device (100) according to claim 8, characterized in that the plastic has integrally formed cooling ribs (34). Steuervorrichtung (100) nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Platine (10) mit Komponenten des Elektrowerkzeugs (200) über eine Datenverbindung verbindbar sind.Control device (100) according to one of the preceding claims,
characterized in that the circuit board (10) with components of the power tool (200) via a data connection can be connected. Elektrowerkzeug (200) aufweisend eine Steuervorrichtung (100) nach einem der Ansprüche 1 bis 10.Power tool (200) comprising a control device (100) according to one of claims 1 to 10. Verfahren zum Herstellen einer Steuervorrichtung (100) für ein Elektrowerkzeug (200), aufweisend die Schritte: - Anordnen eines Leistungsbauelements (20) auf einer Platine (10); und - Anordnen der Platine (10) in einem Netzstecker (30) für das Elektrowerkzeug (200). A method of manufacturing a control device (100) for a power tool (200), comprising the steps of: - arranging a power component (20) on a circuit board (10); and - Arranging the board (10) in a power plug (30) for the power tool (200). Verfahren nach Anspruch 12, wobei das Anordnen der Platine (10) im Netzstecker (30) mittels eines Spritzgiessverfahrens durchgeführt wird.The method of claim 12, wherein arranging the board (10) in the power plug (30) is performed by means of an injection molding process.
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CN108886213B (en) * 2016-03-22 2021-01-15 菲尼克斯电动交通有限公司 Plug-in connection comprising a heat-conducting element arranged on a contact element
EP4213316A1 (en) * 2017-03-23 2023-07-19 TE Connectivity Germany GmbH Electrical connector and electrical connection arrangement comprising an electrical connector
WO2020239624A1 (en) * 2019-05-24 2020-12-03 Robert Bosch Gmbh Plug-in connector system

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DE102014217860A1 (en) 2016-03-10

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