EP1284003B1 - Magnetic coil arrangement - Google Patents
Magnetic coil arrangement Download PDFInfo
- Publication number
- EP1284003B1 EP1284003B1 EP01931659A EP01931659A EP1284003B1 EP 1284003 B1 EP1284003 B1 EP 1284003B1 EP 01931659 A EP01931659 A EP 01931659A EP 01931659 A EP01931659 A EP 01931659A EP 1284003 B1 EP1284003 B1 EP 1284003B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil arrangement
- connecting part
- plug
- metal housing
- fact
- 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.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F2007/062—Details of terminals or connectors for electromagnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/04—Arrangements of electric connections to coils, e.g. leads
Definitions
- the invention relates to a magnet coil arrangement, in particular for actuating valves, according to the preamble of claim 1.
- Such a magnet coil arrangement is known from the DE 43 41 087 C2 known.
- a bobbin In a metal housing, a bobbin is arranged, which is provided with an electrical winding.
- a socket provided with contact lugs is held on the metal housing via a metallic connecting part.
- One of the contact lugs is connected as a protective conductor connection via the connecting part with the metal housing.
- the ends of the coil windings are connected.
- the spaces between the wound bobbin, the metal housing and the socket are filled with plastic. By gaps at the interfaces between the metal housing and the plastic moisture can penetrate into the magnet coil assembly.
- a sealing ring enclosing the connecting part is provided between the contact lug serving as the protective conductor terminal and the metal housing.
- the connecting part is pressed into a recess of the metal housing and into a recess of the contact lug.
- the sealing ring is clamped between the metal housing and the contact lug.
- the invention has for its object to provide a magnetic coil assembly of the type mentioned above, which prevents the transfer of liquid, which has penetrated into the solenoid assembly via a gap between the metal housing and the adjoining plastic in the terminal space.
- the sealing part neither touches the contact lug serving as the protective conductor connection nor the metal housing. Since the contact lug in the region in which the connecting part engages in this extends within the socket, it is sufficient that the sealing part rests on the one hand on the connecting part and on the other hand on the socket. Since the sealing part is acted upon before the encapsulation of the magnetic coil assembly with force, the pressure of the plastic during encapsulation and in the subsequent cooling phase for the sealing effect is irrelevant. The shrinkage of the plastic during cooling plays no role in the sealing effect.
- the sealing part can be arranged both radially and axially sealing between the connecting part and the socket.
- sealing part arranged radially sealing, it is advantageous to arrange the sealing part in a matched to the outer contour of the sealing part recess of the socket. If the recess is deeper than the thickness of the sealing part, the sealing part can yield in the axial direction, ie it assumes a substantially oval to egg-shaped cross-section when installed.
- a collar of the connecting part ensures a defined distance between the metal housing and the surface of the socket facing it. If the outer diameter of the collar is greater than the inner diameter of the recess, plastic does not reach the sealing part when the magnet coil arrangement is overmoulded.
- the voltage applied to the socket prevents the part of the collar, that the connecting part is pulled out of the socket with strong train.
- the invention allows an axially sealing arrangement of the sealing part.
- the connecting part is provided with a collar which comes into contact with the plug-in base when the connecting part is pressed into the contact lug held in the plug-in base and thus limits the force acting on the sealing part.
- the collar prevents the sealing part comes into contact with the hot plastic during encapsulation. If the connecting part is rotationally symmetrical, at least in the sealing region, a commercially available and therefore cost-effective O-ring can be used as the sealing part.
- a side surface of the socket between the outwardly facing side and the metal housing facing side of the socket provided with a projection, there is a positive connection that prevents even with strong train to the contact lugs or on the connecting part that the socket from the plastic body is pulled out.
- One or more recesses on the side facing the metal housing side of the socket, which surround the connecting part, improve the sealing effect in the boundary region between the socket and the plastic used for encapsulation, wherein the recesses facilitate melting during encapsulation or are effective as a labyrinth seal. If only the portion of the protective contact serving as the contact lug, in which the connecting part engages held in the socket, simplifies the production of the socket.
- the contact lug is inserted after the production of the socket in a recess of the socket. It is advantageous to arrange this recess perpendicular to the recess provided for the connecting part. An even better seal against the ingress of moisture into the terminal compartment can be achieved if the contact lug serving as the protective conductor terminal is held only in the socket.
- FIGS. 1 and 2 show various sections through a portion of a first inventively designed magnetic coil assembly 10. It shows the FIG. 1 a longitudinal section through the magnet coil assembly 10 and the FIG. 2 a cross section along the line A - A in the FIG. 1 , Starting from the FIG. 2 show the FIG. 3 to clarify individual parts of the in the FIGS. 1 and 2 shown solenoid assembly 10 in the manner of an exploded drawing. The same components are provided with the same reference numerals.
- a bobbin 12 provided with a winding 11 is surrounded by a pot-shaped metal housing 13.
- prepared socket 14 are serving as a protective conductor terminal contact lug 15 and further contact lugs are arranged, to which the ends of the winding 11 are connected. The other tabs and the coil ends are for reasons of clarity in the FIGS. 1 to 3 not shown.
- the contact lug 15 is enclosed by the material of the plug-in socket 14 except for the region 15a projecting into a connection space 16.
- the contact lug 15 is inserted into the mold and then encapsulated with plastic.
- the connection space 16 is closed by a cap 17 shown schematically.
- a circumferential seal 18 prevents the ingress of moisture into the terminal space 16th
- a bolt-shaped metallic connecting part 21 is arranged in a recess 20 in a recess 20, a bolt-shaped metallic connecting part 21 is arranged.
- the contact lug 15 is both mechanically held on the metal housing 13 via the connecting part 21 and electrically connected thereto.
- O-ring 23 is arranged in a concentric with the recess 20 extending recess 22 of the socket 14 on the metal housing 13 side facing serving as a sealing part O-ring 23 is arranged.
- Both the recess 22 and the sealing region 21a of the connecting part 21 have a circular cross section in the sealing region.
- the inner diameter of the recess 22, the outer diameter of the sealing portion 21a and the O-ring 23 are matched to one another such that the O-ring seals radially.
- the recess 22 is greater in the axial direction of the connecting part 21 than the thickness of the O-ring 23.
- the O-ring 23 can thus escape in the axial direction.
- a collar 21b whose outer diameter is greater than the inner diameter of the recess 22, closes the recess 22. Its thickness determines the distance between the metal housing 13 and the socket 14. As in particular the FIG. 2 shows, the collar lies 21b due to the curvature of the metal housing 13 only linearly on this.
- the connecting part 21 is provided with a toothing 21 c, which is pressed into a corresponding through hole of the contact lug 15.
- the connecting part 21 is also provided with a further toothing 21 d, which is pressed into a corresponding through hole of the metal housing 13.
- An internal thread 21e allows the cap 17 to be fastened to the magnet coil arrangement 10 by a screw connection.
- the collar 21b also secures the connecting part 21 against being pulled out of the socket 14.
- the O-ring 23 Before the overmolding of the magnet coil arrangement 10, the O-ring 23 is pushed onto the sealing region 21a. Thereafter, the connecting member 21 is pressed with the O-ring 23 so far into the socket 14 until the collar 21b is flush with the socket 14. Thus, the recess 22 is closed so that no plastic gets into the recess 22 during the later encapsulation.
- the toothing 21d of the connecting part 21 is pressed into the metal housing 13 until the collar 21b touches the metal housing 13.
- the contact lug 15 is now electrically connected to the metal housing 13, and the socket 14 is held for the extrusion coating on the metal housing 13 in a defined position.
- the bobbin 12 provided with the winding 11 is guided into the metal housing 13 and the ends of the winding 11 are electrically conductively connected to the terminal lugs assigned to them.
- This structure is encapsulated in the usual way with plastic.
- the heated plastic flows into the open spaces and fills them out. After filling with plastic filled areas form after curing a plastic body in the FIGS. 1 and 2 is provided with the reference numeral 25.
- two side surfaces of the socket 14 are provided with projections 14 a and 14 b.
- the projections 14a and 14b are arranged between the outwardly facing side 14c and the metal housing 13 facing side 14d of the socket 14 and designed so that even with strong train on the socket 14 - either via the contact lug 15, via another contact lug or over the connecting part 21 - the socket 14 can not be pulled out of the plastic body 25.
- the metal housing 13 facing side 14d of the Stecksokkels 14 is provided with three recesses 14e, 14f, 14g.
- the recesses 14e, 14f, 14g surround the connecting part 21 concentrically as self-contained grooves. They serve as melt edges, which are melted during encapsulation of the magnet coil assembly 10 of the hot plastic and fuse with it.
- the melting temperature of the plastic used for the plastic body 25 is chosen higher than the melting temperature of the plastic used for the socket 14 for this purpose.
- the recesses 14e, 14f, 14g serve as so-called labyrinth seals, which prevent the transmission of moisture penetrated. In this way, it is possible to securely seal the interfaces between the socket 14 and the plastic body 25 against ingress of moisture.
- the recess 22 and the collar 21b of the connecting part 21 form a chamber with an annular cross-section, in which the O-ring 23 is protected during encapsulation from contact with the hot plastic compound. Since the O-ring 23 does not come into direct contact with the hot plastic, the thermal stress of the O-ring 23 during encapsulation is low. The mechanical stress of the O-ring 23 is low, since it only has to seal radially, but can dodge within the recess 22 in the direction of the axis of the connecting part 21.
- FIG. 4 shows a second magnet coil assembly 10 'according to the invention in one of FIG. 2 corresponding representation.
- the same parts are provided with the same reference numerals.
- the connection space 16 final cap is provided with the reference numeral 17 '.
- cap 17 is the cap 17 'with the seal 18 on the socket 14' on.
- the connecting part between the metal housing 13 and the contact lug 15 is denoted by the reference numeral 21 'provided.
- the O-ring 23 is axially sealingly disposed between the socket 14 'and a collar 21b' of the connecting part 21 '.
- the collar 21b ' limits the distance between the metal housing 13 and the socket 14'.
- the collar 21b ' determines the distance between the surfaces of the socket 14' and the connecting part 21 'against which the O-ring 23 abuts. This limits the force acting on the O-ring 23 in the direction of the axis of the connecting part 21 '. It is not necessary that the O-ring 23 in the radial direction sealingly against the connecting part 21 ', since the sealing effect is already effected by the force acting in the axial direction on the O-ring 23 force. Since the inner diameter of the collar 21b 'is greater than the outer diameter of the O-ring 23, the O-ring 23 can escape in axial direction under axial force.
- the collar 21b additionalally prevents the O-ring 23 from coming into contact with the hot plastic during encapsulation. Also in this embodiment, moisture that has penetrated via a gap between the metal housing 13 and the plastic body 25, only reach up to the O-ring 23. Due to the sealing by the O-ring 23, however, moisture that has penetrated can no longer enter the gap between the contact lug 15 and the plug-in base 14 ', via which the moisture would be conducted into the connection space 16.
- FIGS. 5 and 6 show various sections through a part of a third formed according to the invention magnetic coil assembly 10 " FIG. 5 a cut according to the FIG. 1 through the magnet coil arrangement 10 " FIG. 5 only the section is shown, in the magnet coil arrangement 10 "differs from that in the FIG. 1 shown magnetic coil assembly 10 differs.
- the FIG. 6 shows for clarification individual parts of the FIG. 5 shown magnetic coil assembly 10 "in an exploded view according to the FIG. 2 , The same components are provided with the same reference numerals.
- the third magnet coil arrangement 10 "differs from the one in the FIGS. 1 to 4 shown magnetic coil assemblies 10 and 10 'with respect to the arrangement of the contact lug 15 in the socket. This one is in the FIGS. 5 and 6 While in the magnetic coil assemblies 10 and 10 ', the contact lug 15 in the socket 14 (14 FIGS. 1 to 3 ) and 14 '( FIG. 4 ), the plug-in base 14 "is provided with an additional recess 28 which is arranged perpendicular to the recess 20 for receiving the connection part 21.
- the recess 28 serves to receive the area of the contact lug 15 provided with the reference numeral 15b 15b is provided with a through-hole 29.
- This arrangement has the advantage that in the production of the plug-in socket 14 ", the contact lug 15 does not need to be inserted into the injection mold.
- the contact lug 15 is introduced only before the encapsulation of the magnetic coil assembly 10 "in the recess 20 of the socket 14".
- the cap surrounding the terminal compartment is in the FIG. 5 not shown. She is - as in the FIG. 2 shown - form so that it rests on the plastic body 25.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
Abstract
Description
Die Erfindung betrifft eine Magnetspulenanordnung, insbesondere zum Betätigen von Ventilen, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a magnet coil arrangement, in particular for actuating valves, according to the preamble of claim 1.
Eine derartige Magnetspulenanordnung ist aus der
Bedingt durch die Wölbung des Metallgehäuses ist der Abstand zwischen der Kontaktfahne und dem Metallgehäuse im Anlagebereich des Dichtrings unterschiedlich groß, so daß der Dichtring mehr oder weniger weit nach außen ausweicht. Dies führt zu einer ungleichmäßigen Verformung des Dichtrings über seinem Umfang. Die freie Umfangsfläche des Dichtrings, also die Fläche des Dichtrings, die nicht an einem Metallteil anliegt, kommt beim Umspritzen mit dem Kunststoff in Kontakt. Durch die hohe Temperatur des Kunststoffs während des Umspritzens wird das Material des Dichtrings thermisch stark beansprucht. Außerdem ist nicht sichergestellt, daß nach dem Erhärten des Kunststoffs, bei dem immer mit einem gewissen Schwund zu rechnen ist, eine einwandfreie Dichtwirkung zwischen dem Kunststoff und der vor dem Umspritzen freien Oberfläche des Dichtrings gewährleistet ist. Damit besteht die Gefahr, daß trotzdem Feuchtigkeit, die über einen Spalt zwischen Metallgehäuse und dem Kunststoff zu dem Dichtring gelangt ist, über einen Spalt zwischen dem Dichtring und dem an ihn grenzenden Kunststoff sowie über den Spalt zwischen der Kontaktfahne und dem Stecksockel oder über den Spalt zwischen der Kontaktfahne und dem Kunststoff in den Anschlußraum eintritt.Due to the curvature of the metal housing, the distance between the contact lug and the metal housing in the contact region of the sealing ring of different sizes, so that the sealing ring evades more or less far out. This leads to an uneven deformation of the sealing ring over its circumference. The free peripheral surface of the sealing ring, so the surface of the sealing ring, which is not applied to a metal part, comes in contact with the plastic during contact. Due to the high temperature of the plastic during the extrusion coating, the material of the sealing ring is subjected to high thermal stresses. In addition, it is not ensured that after hardening of the plastic, which is always to be expected with a certain loss, a perfect sealing effect between the plastic and the free before encapsulation surface of the sealing ring is guaranteed. Thus, there is the danger that moisture that has passed through a gap between the metal housing and the plastic to the sealing ring, via a gap between the sealing ring and the adjacent plastic and over the gap between the contact lug and the socket or over the gap between the contact lug and the plastic enters the terminal compartment.
Der Erfindung liegt die Aufgabe zugrunde, eine Magnetspulenanordnung der eingangs genannten Art zu schaffen, die eine Weiterleitung von Flüssigkeit, die über einen Spalt zwischen dem Metallgehäuse und dem an dieses angrenzenden Kunststoff in die Magnetspulenanordnung eingedrungen ist, in den Anschlußraum verhindert.The invention has for its object to provide a magnetic coil assembly of the type mentioned above, which prevents the transfer of liquid, which has penetrated into the solenoid assembly via a gap between the metal housing and the adjoining plastic in the terminal space.
Diese Aufgabe wird durch die im Anspruch 1 gekennzeichneten Merkmale gelöst. Bei der erfindungsgemäßen Magnetspulenanordnung berührt das Dichtteil weder die als Schutzleiteranschluß dienende Kontaktfahne noch das Metallgehäuse. Da die Kontaktfahne in dem Bereich, in dem das Verbindungsteil in diese eingreift, innerhalb des Stecksockels verläuft, genügt es, daß das Dichtteil einerseits an dem Verbindungsteil und andererseits an dem Stecksockel anliegt. Da das Dichtteil bereits vor dem Umspritzen der Magnetspulenanordnung mit Kraft beaufschlagt wird, spielt der Druck des Kunststoffs beim Umspritzen und in der darauf folgenden Abkühlphase für die Dichtwirkung keine Rolle. Auch der Schwund des Kunststoffs während des Abkühlens spielt für die Dichtwirkung keine Rolle. Das Dichtteil kann sowohl radial als auch axial dichtend zwischen dem Verbindungsteil und dem Stecksockel angeordnet werden.This object is achieved by the features characterized in claim 1. In the case of the magnet coil arrangement according to the invention, the sealing part neither touches the contact lug serving as the protective conductor connection nor the metal housing. Since the contact lug in the region in which the connecting part engages in this extends within the socket, it is sufficient that the sealing part rests on the one hand on the connecting part and on the other hand on the socket. Since the sealing part is acted upon before the encapsulation of the magnetic coil assembly with force, the pressure of the plastic during encapsulation and in the subsequent cooling phase for the sealing effect is irrelevant. The shrinkage of the plastic during cooling plays no role in the sealing effect. The sealing part can be arranged both radially and axially sealing between the connecting part and the socket.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet. Wird das Dichtteil radial dichtend angeordnet, ist es vorteilhaft, das Dichtteil in einer an die Außenkontur des Dichtteils angepaßten Ausnehmung des Stecksockels anzuordnen. Ist die Ausnehmung tiefer als die Dicke des Dichtteils, kann das Dichtteil in axialer Richtung ausweichen, d. h. es nimmt im eingebauten Zustand einen im wesentlichen ovalen bis eiförmigen Querschnitt an. Ein Bund des Verbindungsteils sorgt für einen definierten Abstand zwischen dem Metallgehäuse und der diesem zugewandten Fläche des Stecksockels. Ist der Außendurchmesser des Bunds größer als der Innendurchmesser der Ausnehmung, gelangt beim Umspritzen der Magnetspulenanordnung kein Kunststoff an das Dichtteil. Außerdem verhindert der an dem Stecksockel anliegende Teil des Bunds, daß das Verbindungsteil bei starkem Zug aus dem Stecksockel herausgezogen wird. Alternativ zu einer radial dichtenden Anordnung des Dichtteils erlaubt die Erfindung eine axial dichtende Anordnung des Dichtteils. In diesem Fall ist das Verbindungsteil mit einem Kragen versehen, der beim Einpressen des Verbindungsteils in die in dem Stecksockel gehaltene Kontaktfahne an dem Stecksockel zur Anlage kommt und so die auf das Dichtteil wirkende Kraft begrenzt. Zusätzlich verhindert der Kragen, daß das Dichtteil beim Umspritzen mit dem heißen Kunststoff in Berührung kommt. Ist das Verbindungsteil zumindest im Dichtbereich rotationssymmetrisch ausgebildet, kann als Dichtteil ein handelsüblicher und damit kostengünstiger O-Ring verwendet werden. Wird eine Seitenfläche des Stecksockels zwischen der nach außen weisenden Seite und der dem Metallgehäuse zugewandten Seite des Stecksockels mit einem Vorsprung versehen, ergibt sich eine formschlüssige Verbindung, die auch bei starkem Zug an den Kontaktfahnen oder an dem Verbindungsteil verhindert, daß der Stecksockel aus dem Kunststoffkörper herausgezogen wird. Eine oder mehrere Ausnehmungen auf der dem Metallgehäuse zugewandten Seite des Stecksockels, die das Verbindungsteil umgeben, verbessern die Dichtwirkung im Grenzbereich zwischen dem Stecksockel und dem zum Umspritzen verwendeten Kunststoff, wobei die Ausnehmungen ein Anschmelzen beim Umspritzen erleichtern oder als Labyrinthdichtung wirksam sind. Ist nur der Abschnitt der als Schutzleiteranschluß dienenden Kontaktfahne, in den das Verbindungsteil eingreift, in dem Stecksockel gehalten, vereinfacht sich die Herstellung des Stecksockels. Die Kontaktfahne wird nach der Herstellung des Stecksockels in eine Ausnehmung des Stecksockels eingeschoben. Dabei ist es vorteilhaft, diese Ausnehmung senkrecht zu der für das Verbindungsteil vorgesehenen Ausnehmung anzuordnen. Eine noch bessere Abdichtung gegen ein Eindringen von Feuchtigkeit in den Anschlußraum läßt sich erzielen, wenn die als Schutzleiteranschluß dienende Kontaktfahne nur in dem Stecksockel gehalten ist.Advantageous developments of the invention are characterized in the subclaims. If the sealing part arranged radially sealing, it is advantageous to arrange the sealing part in a matched to the outer contour of the sealing part recess of the socket. If the recess is deeper than the thickness of the sealing part, the sealing part can yield in the axial direction, ie it assumes a substantially oval to egg-shaped cross-section when installed. A collar of the connecting part ensures a defined distance between the metal housing and the surface of the socket facing it. If the outer diameter of the collar is greater than the inner diameter of the recess, plastic does not reach the sealing part when the magnet coil arrangement is overmoulded. In addition, the voltage applied to the socket prevents the part of the collar, that the connecting part is pulled out of the socket with strong train. As an alternative to a radially sealing arrangement of the sealing part, the invention allows an axially sealing arrangement of the sealing part. In this case, the connecting part is provided with a collar which comes into contact with the plug-in base when the connecting part is pressed into the contact lug held in the plug-in base and thus limits the force acting on the sealing part. In addition, the collar prevents the sealing part comes into contact with the hot plastic during encapsulation. If the connecting part is rotationally symmetrical, at least in the sealing region, a commercially available and therefore cost-effective O-ring can be used as the sealing part. If a side surface of the socket between the outwardly facing side and the metal housing facing side of the socket provided with a projection, there is a positive connection that prevents even with strong train to the contact lugs or on the connecting part that the socket from the plastic body is pulled out. One or more recesses on the side facing the metal housing side of the socket, which surround the connecting part, improve the sealing effect in the boundary region between the socket and the plastic used for encapsulation, wherein the recesses facilitate melting during encapsulation or are effective as a labyrinth seal. If only the portion of the protective contact serving as the contact lug, in which the connecting part engages held in the socket, simplifies the production of the socket. The contact lug is inserted after the production of the socket in a recess of the socket. It is advantageous to arrange this recess perpendicular to the recess provided for the connecting part. An even better seal against the ingress of moisture into the terminal compartment can be achieved if the contact lug serving as the protective conductor terminal is held only in the socket.
Die Erfindung wird im folgenden mit ihren weiteren Einzelheiten anhand von in den Zeichnungen dargestellten Ausführungsbeispielen näher erläutert. Es zeigen
- Figur 1
- einen Längsschnitt durch einen Teil einer ersten erfindungsgemäß ausgebildeten Magnetspulenanordnung,
- Figur 2
- einen Schnitt entlang der Linie A - A in der
Figur 1 , - Figur 3
- einzelne Teile der in den
Figuren 1 und2 dargestellten Magnetspulenanordnung in der Art einer Explosionszeichnung, - Figur 4
- einen Schnitt entsprechend der
Figur 2 durch eine zweite erfindungsgemäße Magnetspulenanordnung, - Figur 5
- einen Schnitt entsprechend der
Figur 1 durch eine dritte erfindungsgemäße Magnetspulenanordnung und
- Figur 6
- einzelne Teile der in der
Figur 5 dargestellten Magnetspulenanordnung in der Art einer Explosionszeichnung.
- FIG. 1
- a longitudinal section through part of a first inventively designed magnetic coil assembly,
- FIG. 2
- a section along the line A - A in the
FIG. 1 . - FIG. 3
- individual parts of the in the
FIGS. 1 and2 shown magnetic coil assembly in the manner of an exploded view, - FIG. 4
- a cut according to the
FIG. 2 by a second magnet coil arrangement according to the invention, - FIG. 5
- a cut according to the
FIG. 1 by a third magnet coil arrangement according to the invention and
- FIG. 6
- individual parts of the in the
FIG. 5 shown solenoid assembly in the manner of an exploded view.
Die
Ein mit einer Wicklung 11 versehener Spulenkörper 12 ist von einem topfförmigen Metallgehäuse 13 umgeben. In einem aus elektrisch isolierenden Material, z. B. Kunststoff, hergestellten Stecksockel 14 sind eine als Schutzleiteranschluß dienende Kontaktfahne 15 sowie weitere Kontaktfahnen angeordnet, an die die Enden der Wicklung 11 angeschlossen sind. Die weiteren Kontaktfahnen sowie die Wicklungsenden sind aus Gründen der Übersichtlichkeit in den
In einer Ausnehmung 20 ist ein bolzenförmiges metallisches Verbindungsteil 21 angeordnet. Die Kontaktfahne 15 ist über das Verbindungsteil 21 sowohl mechanisch an dem Metallgehäuse 13 gehalten als auch elektrisch mit diesem verbunden. In einer konzentrisch zu der Ausnehmung 20 verlaufenden Ausnehmung 22 des Stecksockels 14 auf der dem Metallgehäuse 13 zugewandten Seite ist ein als Dichtteil dienender O-Ring 23 angeordnet. Sowohl die Ausnehmung 22 als auch der Dichtbereich 21a des Verbindungsteils 21 weisen im Dichtbereich einen kreisförmigen Querschnitt auf. Der Innendurchmesser der Ausnehmung 22, der Außendurchmesser des Dichtbereichs 21a und der O-Ring 23 sind derart aufeinander abgestimmt, daß der O-Ring radial dichtet. Die Ausnehmung 22 ist in Achsrichtung des Verbindungsteils 21 größer als die Dicke des O-Rings 23. Der O-Ring 23 kann somit in axialer Richtung ausweichen. Ein Bund 21b, dessen Außendurchmesser größer als der Innendurchmesser der Ausnehmung 22 ist, verschließt die Ausnehmung 22. Seine Dicke bestimmt den Abstand zwischen dem Metallgehäuse 13 und dem Stecksockel 14. Wie insbesondere die
Vor dem Umspritzen der Magnetspulenanordnung 10 wird der O-Ring 23 auf den Dichtbereich 21a geschoben. Danach wird das Verbindungsteil 21 mit dem O-Ring 23 so weit in den Stecksockel 14 gepreßt, bis der Bund 21b bündig an dem Stecksockel 14 anliegt. Damit ist die Ausnehmung 22 derart verschlossen, daß beim späteren Umspritzen kein Kunststoff in die Ausnehmung 22 gelangt. In einem weiteren Schritt wird die Verzahnung 21d des Verbindungsteils 21 in das Metallgehäuse 13 gepreßt, bis der Bund 21b das Metallgehäuse 13 berührt. Die Kontaktfahne 15 ist jetzt mit dem Metallgehäuse 13 elektrisch verbunden, und der Stecksockel 14 ist für den Umspritzvorgang an dem Metallgehäuse 13 in einer definierten Lage gehalten. Nach diesen vorbereitenden Schritten wird der mit der Wicklung 11 versehene Spulenkörper 12 in das Metallgehäuse 13 geführt und die Enden der Wicklung 11 mit den ihnen zugeordneten Anschlußfahnen elektrisch leitend verbunden. Dieses Gebilde wird in üblicher Weise mit Kunststoff umspritzt. Dabei fließt der erhitzte Kunststoff in die freien Räume und füllt diese aus. Die nach dem Umspritzen mit Kunststoff gefüllten Bereiche bilden nach dem Aushärten einen Kunststoffkörper, der in den
Wie in der
Die dem Metallgehäuse 13 zugewandte Seite 14d des Stecksokkels 14 ist mit drei Ausnehmungen 14e, 14f, 14g versehen. Die Ausnehmungen 14e, 14f, 14g umgeben das Verbindungsteil 21 konzentrisch als in sich geschlossene Rillen. Sie dienen als Schmelzkanten, die beim Umspritzen der Magnetspulenanordnung 10 von dem heißen Kunststoff angeschmolzen werden und mit diesem verschmelzen. Die Schmelztemperatur des für den Kunststoffkörper 25 verwendeten Kunststoffs wird hierfür höher gewählt als die Schmelztemperatur des für den Stecksockel 14 verwendeten Kunststoffs. Soweit eine vollständige Verschmelzung nicht stattfindet oder nicht beabsichtigt ist, dienen die Ausnehmungen 14e, 14f, 14g als sogenannte Labyrinthdichtungen, die eine Weiterleitung von eingedrungener Feuchtigkeit verhindern. Auf diese Weise ist es möglich, die Grenzflächen zwischen dem Stecksockel 14 und dem Kunststoffkörper 25 sicher gegen ein Eindringen von Feuchtigkeit abzudichten.The
Anders ist es dagegen bei den Grenzflächen zwischen Metall und Kunststoff, wie zwischen dem Metallgehäuse 13 und dem Kunststoffkörper 25 sowie zwischen der Kontaktfahne 15 und dem Stecksockel 14. Hier lassen sich Spalten, die ein Eindringen von Feuchtigkeit ermöglichten, nicht vermeiden. Es müssen daher zusätzliche Maßnahmen ergriffen werden, damit keine Feuchtigkeit, die von außen über einen Spalt zwischen dem Metallgehäuse 13 und dem Kunststoffkörper 25 eingedrungen ist, über einen Spalt zwischen der Kontaktfahne 15 und dem an diese angrenzenden Kunststoff des Stecksockels 14 in den Anschlußraum 16 gelangt. Gemäß der Erfindung ist hierfür der als Dichtteil dienende O-Ring 23 vorgesehen, der radial dichtend sowohl an dem Verbindungsteil 21 als auch an dem Stecksockel 14 anliegt. Nur bis hierhin kann Feuchtigkeit, die über einen Spalt zwischen dem Metallgehäuse 13 und dem Kunststoffkörper 25 eingedrungen ist, gelangen. In den Spalt zwischen der Kontaktfahne 15 und dem Stecksockel 14, über den Feuchtigkeit in den Anschlußraum 16 weitergeleitet würde, kann jedoch - wie oben beschrieben - wegen des O-Rings 23 keine Feuchtigkeit mehr gelangen.On the other hand, it is different at the interfaces between metal and plastic, such as between the
Die Ausnehmung 22 und der Bund 21b des Verbindungsteils 21 bilden eine Kammer mit kreisringförmigem Querschnitt, in der der O-Ring 23 beim Umspritzen vor einer Berührung mit der heißen Kunststoffmasse geschützt ist. Da der O-Ring 23 mit dem heißen Kunststoff nicht in direkte Berührung kommt, ist die thermische Beanspruchung des O-Rings 23 beim Umspritzen nur gering. Auch die mechanische Beanspruchung des O-Rings 23 ist gering, da er nur radial abdichten muß, in.Richtung der Achse des Verbindungsteils 21 jedoch innerhalb der Ausnehmung 22 ausweichen kann.The
Die
Die
Die dritte Magnetspulenanordnung 10" unterscheidet sich von den in den
Die den Anschlußraum umgebende Kappe ist in der
Claims (13)
- A solenoid coil arrangement, in particular for operating valves, comprising- a wound coil former,- a metal housing surrounding the wound coil former,- a plug-in base provided with contact tabs, one of which serves as a protective conductor connection,- a metallic connecting part which is arranged between the metal housing and the contact tab serving as protective conductor connection and which engages in a recess in the metal housing and in the contact tab serving as protective conductor connection,- an annular sealing part surrounding the connecting part, and- in which the free spaces between the wound coil former, the metal housing and the plug-in base are filled with plastic.
characterized by the fact that- the contact tab (15) serving as protective conductor connection is arranged inside the plug-in base (14; 14'; 14") in an area in which the connecting part (21; 21') engages in said contact tab (15), and- the sealing part (23) is arranged in a sealing manner between the connecting part (21; 21') and the plug-in base (14; 14'; 14"). - A solenoid coil arrangement according to claim 1, characterized by the fact that the sealing part (23) is arranged between the connecting part (21) and the plug-in base (14; 14") so as to seal in radial direction.
- A solenoid coil arrangement according to claim 2, characterized by the fact that on its side facing the metal housing (13), the plug-in base (14; 14") is provided with a recess (22) matched to the outer contour of the sealing part (23).
- A solenoid coil arrangement according to claim 3, characterized by the fact that the recess (22) is deeper than thickness of the sealing part (23).
- A solenoid coil arrangement according to any of the preceding claims, characterized by the fact that the connecting part (21) is provided with a shoulder (21b) between the part (21d) that engages in the metal housing (13) and the part (21a) which is enclosed by the sealing part (23).
- A solenoid coil arrangement according to claim 5 in conjunction with claim 4, characterized by the fact that the outer diameter of the shoulder (21b) is larger than the diameter of the recess (22).
- A solenoid coil arrangement according to claim 1, characterized by the fact that the sealing part (23) is arranged between the connecting part (21') and the plug-in base (14') so as to seal in the axial direction, that the connecting part (21') is provided with a collar (21b') which presses the sealing part (23) in the axial direction against the plug-in base (14'), and that the collar (21b') encloses the sealing part (23) laterally.
- A solenoid coil arrangement according to any of the preceding claims, characterized by the fact that the connecting part (21; 21') is rotationally symmetrical and that the sealing part (23) is an O-ring.
- A solenoid coil arrangement according to any of the preceding claims, characterized by the fact that at least one side surface of the plug-in base (14) is provided with a projection (14a, 14b) between the outwardly pointing side (14c) and the side (14d) of the plug-in base (14) which faces the metal housing (13).
- A solenoid coil arrangement according to any of the preceding claims, characterized by the fact that the side (14b) of the plug-in base (14) which faces the metal housing (13) is provided with at least one recess (14e, 14f, 14g) surrounding the connecting part (21).
- A solenoid coil arrangement according to any of the preceding claims, characterized by the fact that the plug-in base (14") is provided with a first recess (20) to accommodate the connecting part (21) and with a second recess (28) to accommodate that region of the contact tab (15) serving as the protective conductor connection in which the connecting part (21) engages.
- A solenoid coil arrangement according to claim 11, characterized by the fact that the second recess (28) is arranged at right angles to the first recess (20).
- A solenoid coil arrangement according to any of claims 1 to 10, characterized by the fact that the contact tab (15) serving as the protective conductor connection runs only in the plug-in base 14; 14').
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10025719 | 2000-05-25 | ||
DE10025719 | 2000-05-25 | ||
DE10049709 | 2000-07-10 | ||
DE10049709A DE10049709A1 (en) | 2000-05-25 | 2000-10-07 | Magnetic coil arrangement |
PCT/EP2001/004748 WO2001091140A1 (en) | 2000-05-25 | 2001-04-27 | Magnetic coil arrangement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1284003A1 EP1284003A1 (en) | 2003-02-19 |
EP1284003B1 true EP1284003B1 (en) | 2009-12-02 |
Family
ID=26005813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01931659A Expired - Lifetime EP1284003B1 (en) | 2000-05-25 | 2001-04-27 | Magnetic coil arrangement |
Country Status (3)
Country | Link |
---|---|
US (1) | US6784778B2 (en) |
EP (1) | EP1284003B1 (en) |
WO (1) | WO2001091140A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004029185A1 (en) * | 2004-06-16 | 2006-01-12 | Hydac Electronic Gmbh | actuator |
DE202007005132U1 (en) * | 2007-04-04 | 2008-08-14 | Eto Magnetic Gmbh | Electromagnetic actuator |
DE102010055212A1 (en) * | 2010-12-20 | 2012-06-21 | Svm Schultz Verwaltungs-Gmbh & Co. Kg | Electromagnet with a connection area |
US9160205B2 (en) | 2012-03-20 | 2015-10-13 | Qualcomm Incorporated | Magnetically permeable structures |
US9583259B2 (en) | 2012-03-20 | 2017-02-28 | Qualcomm Incorporated | Wireless power transfer device and method of manufacture |
US9653206B2 (en) | 2012-03-20 | 2017-05-16 | Qualcomm Incorporated | Wireless power charging pad and method of construction |
US9431834B2 (en) | 2012-03-20 | 2016-08-30 | Qualcomm Incorporated | Wireless power transfer apparatus and method of manufacture |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683454A (en) * | 1985-10-31 | 1987-07-28 | Automatic Switch Company | Solenoid actuator with electrical connection modules |
US4682136A (en) * | 1985-11-26 | 1987-07-21 | United Technologies Automotive, Inc. | Fused covering for an electrical conductor and method for making the fused covering |
IT213013Z2 (en) | 1987-11-24 | 1989-10-13 | Weber Srl | EXCITATION COIL FOR A FUEL DOSING AND SPRAYING VALVE FOR A FUEL INJECTION DEVICE IN AN INTERNAL COMBUSTION ENGINE |
FR2640413B1 (en) * | 1988-12-12 | 1993-04-02 | Mors | ELECTRIC COIL ARRANGEMENT, ESPECIALLY ELECTRO-MAGNET, COMPRISING A COIL CARCASE AND A COIL COVER |
US5204044A (en) * | 1989-03-28 | 1993-04-20 | Aisan Kogyo Kabushiki Kaisha | Method of asembling a DC solenoid with a thermistor |
DE4341087C2 (en) * | 1993-12-02 | 1996-02-08 | Bso Steuerungstechnik Gmbh | Sealed switching device |
JP3653734B2 (en) * | 1995-09-08 | 2005-06-02 | 東陶機器株式会社 | solenoid |
DE19622634A1 (en) | 1996-06-05 | 1997-12-11 | Nass Magnet Gmbh | Solenoid coil and process for its manufacture |
US5710535A (en) * | 1996-12-06 | 1998-01-20 | Caterpillar Inc. | Coil assembly for a solenoid valve |
US6127912A (en) * | 1998-08-03 | 2000-10-03 | Caterpillar Inc. | Bobbin for an encapsulated coil of a solenoid assembly |
US6121865A (en) | 1998-08-03 | 2000-09-19 | Caterpillar Inc. | Solenoid assembly having a sealing device for the electrical leads |
DE19854100B4 (en) * | 1998-11-24 | 2013-10-10 | Bosch Rexroth Aktiengesellschaft | Solenoid assembly |
DE19958199A1 (en) * | 1998-12-11 | 2000-06-29 | Continental Teves Inc | Electrical connector for producing solderless connection between coil and circuit board e.g. for motor vehicle anti-lock braking system, has coil body with protruding plastic stud, and pre-tinned coil wire section |
US6310533B2 (en) * | 1999-07-20 | 2001-10-30 | Cliftronics, Inc. | Water-resistant encapsulation of solenoid |
-
2001
- 2001-04-27 EP EP01931659A patent/EP1284003B1/en not_active Expired - Lifetime
- 2001-04-27 US US10/276,534 patent/US6784778B2/en not_active Expired - Fee Related
- 2001-04-27 WO PCT/EP2001/004748 patent/WO2001091140A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2001091140A1 (en) | 2001-11-29 |
EP1284003A1 (en) | 2003-02-19 |
US6784778B2 (en) | 2004-08-31 |
US20040104795A1 (en) | 2004-06-03 |
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