EP2234138A2 - Frame/bimetal connection and method for producing same - Google Patents

Frame/bimetal connection and method for producing same Download PDF

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Publication number
EP2234138A2
EP2234138A2 EP20100155417 EP10155417A EP2234138A2 EP 2234138 A2 EP2234138 A2 EP 2234138A2 EP 20100155417 EP20100155417 EP 20100155417 EP 10155417 A EP10155417 A EP 10155417A EP 2234138 A2 EP2234138 A2 EP 2234138A2
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EP
European Patent Office
Prior art keywords
bracket
bimetallic element
bimetal
connection according
bimetallic
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Granted
Application number
EP20100155417
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German (de)
French (fr)
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EP2234138A3 (en
EP2234138B1 (en
Inventor
G. Hermann Köhler
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INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
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INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
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Publication of EP2234138A2 publication Critical patent/EP2234138A2/en
Publication of EP2234138A3 publication Critical patent/EP2234138A3/en
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Publication of EP2234138B1 publication Critical patent/EP2234138B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5418—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting using cantilevered bimetallic snap elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element

Definitions

  • the present invention relates to a bimetallic / bimetallic connection of a bimetallic temperature controller and to a method of making a bail / bimetallic connection of a bimetallic temperature controller.
  • a conventional temperature controller 1 generally comprises an S-shaped mounting bracket 11 on which an actuator 12 is arranged, which acts via a first pin 13 on a spring combination 14 which triggers a switching element 16 which is electrically connected to contacts 17, which an insulating member 18 are held, which is also arranged on the bracket 11 1.
  • the mounting bracket 11 also includes at its one end a mounting hole 102 through which the temperature controller 1 can be attached to an application device.
  • a bimetal 10 is disposed on the bracket 11 and connected to the bracket 11, which also has the mounting hole 102, and acts via a second pin 15 on the spring combination 14, which switches the switching element 16.
  • the bimetallic element 10 is thus connected with its free end 104 via the insulating second pin 15 with the current-carrying acting as a switching spring spring combination 14 and transmits its thermal curvature on the spring combination fourteenth
  • bracket 11 and bimetallic element 10 can be carried out by resistance welding.
  • the welding points 101 concentrically arranged around the mounting hole 102 of the bimetal 10 / mounting bracket 11 such that two welds 101, 101 in a line next to each other the free end of the bimetallic element 12 or turned away.
  • the two welding spots 101 'facing the free end of the bimetallic element 10 are disadvantageously close to the material cross section of the bimetallic element 10 which experiences the greatest bending stress when the bimetallic element bends or curves due to heating, and also has a mechanical force the free end 104 of the bimetallic element 10 acts, for example, by the spring combination 14.
  • the material of the bimetal element 10 undergoes a thermal and mechanical influence at this point as a result of the welding, so that the permissible bending stresses are lowered by relaxation of the material and by weakening of the cross-section.
  • the disadvantageous consequence of this is a change in the maximum both thermal and mechanical load capacity of the bimetallic element 10 as well as a continuous change in the load capacity of the bimetallic element 10 in the long-term behavior with the consequence of a drift of the switching behavior.
  • This effect can be counteracted either by increasing the material cross-section of the bimetal element 10 or by selecting and using a material with suitably higher properties of the modulus of elasticity or of the permissible bending stresses.
  • the thickness of the copper layer for the degree of change of importance.
  • Another object of the present invention is to provide a method of making an improved stirrup / bimetal connection which overcomes the aforementioned disadvantages of the prior art and also allows to select a bimetallic element comprising a material pairing sensitive to a welding process.
  • a bow / bimetallic connection according to the invention for a temperature controller comprises in particular a bimetallic element which is connected to a mounting bracket, wherein the binnetallelement acts via a pin on a spring combination which triggers a switching element and the bracket carries an actuating element, which also acts on the spring combination via a pin acts, wherein at the juncture of bimetallic element and the bimetallic element is firmly connected only outside its bending range with the bracket, so that there is no cross-sectional change of the bimetallic element in its bending area by the connection of bimetallic element and bracket
  • the bimetallic element in this case comprises a bimetal with a copper interlayer between its active and passive layer, wherein the copper interlayer is advantageously present in the order of 10 to 60% of the total thickness of the bimetallic element.
  • the mounting bracket and the bimetallic element are welded together at their connection point, wherein the welding can be provided in particular advantageously by means of laser welding or resistance welding.
  • connection point of mounting bracket and bimetallic element comprises a mounting hole for attachment of the temperature switch to an application device, wherein at least one welding point for connecting the bimetallic element is provided with the mounting bracket at a position of the bending area and in particular of the Area is spaced, in the the bimetal experiences the greatest bending stress, wherein the mounting hole is advantageously arranged between the bending region and welding point.
  • the bimetal is arranged on the mounting bracket and connected to the mounting bracket, that the passive metal side forms the welding side of the bimetal, wherein particularly advantageously the material thickness of the passive side is equal to or greater than the material thickness of the active side can be.
  • the bracket and the bimetallic element are welded together such that they are spaced at their junction about 0 mm to 0.1 mm apart, in particular advantageously the bracket and the bimetallic without air gap flush lie on each other.
  • connection of bimetallic element and bracket is advantageously formed by means of laser welding or resistance welding outside the range of the greatest bending stress of the bimetal.
  • connection of bimetallic elements and stirrups is designed as a seam weld outside the range of the greatest bending stress of the bimetallic element between bimetallic element and bracket, it being understood that a combination with the above-mentioned spot welding can provide a further reinforced connection ,
  • the present invention also relates in particular to a method for connecting a yoke and a bimetallic element in the manufacture of a temperature controller, which makes it possible to provide the above-mentioned features of an advantageous bracket / bimetal connection according to the invention for a temperature controller, wherein in particular the yoke and the Bimetallic element are welded together only at least one position outside the bending region and in particular outside the range of the greatest bending stress of the bimetallic element.
  • bracket / bimetal connection according to the invention and the abovementioned method according to the invention for producing a bracket / bimetallic connection for a temperature controller, it is also advantageously possible to use a bimetal with a material pairing sensitive to a welding process and in particular a bimetal with an intermediate layer of copper.
  • Fig. 2a shows a schematic perspective view of a temperature controller 2 with a bracket / bimetal connection according to the invention
  • Fig. 2b shows the temperature controller 2 of Fig. 2a from a different perspective
  • Fig. 2c shows the temperature controller of Fig. 2a and 2b from above
  • Fig. 3 shows a schematic side view of the temperature controller of Fig. 2 ,
  • the in the Fig. 2 and 3 illustrated temperature controller 2 with the bracket / bimetallic connection comprises a Befest Trentsbügei 21, with a Bimetallic element 20 is connected, wherein the mounting bracket 21 is bent in a suitable manner, and wherein on the mounting bracket 21, an actuating element 22 is arranged, which acts via a first pin 23 on a spring combination 24 which triggers a switching element 26, which electrically contacts 27 is connected, which are held by an insulating member 28 which is also arranged on the bracket 21.
  • the mounting bracket 21 also includes at its one end a mounting hole 202 through which the temperature controller 2 can be attached to an application device.
  • a bimetal 20 is disposed on the bracket 21 and connected to the bracket 21, wherein the bimetal 20 also has the mounting hole 202, and wherein the bimetallic element 20 acts via a second insulating pin 25 on the spring combination 24, the the switching element 26 switches.
  • the bimetallic element 20 is connected with its free end 204 via the insulating second pin 25 with the current-carrying acting as a switching spring spring combination 24 and transmits its thermal curvature on the spring combination 24th
  • the bimetallic element 20 is connected by welding to the mounting bracket 21 and in particular advantageously by laser welding or resistance welding and also particularly advantageous by means of welds 201, which are spaced from the bending region of the bimetallic element so that no cross-sectional change of the bimetallic element by the connection of bimetallic element and mounting bracket is present in its bending region and in particular no influence of the weld on the region of the greatest bending stress 203 of the bimetallic element 20 occurs, which is located directly in the vicinity of the connection of bimetallic element 20 and mounting bracket 21 and against the free end 204 of the bimetallic element 20.
  • At least one welding point 201 which advantageously and according to the invention from the viewpoint of the free end of the bimetallic element 204 and the region of greatest bending stress 203 of Bimetallic element 20 is arranged opposite the mounting hole 202, may also and / or additionally advantageously not shown in the drawings seam welding at the attachment end between the bimetallic element 20 and the mounting bracket 21 for attachment of the bimetallic element 20 may be formed on the bracket 21.
  • a bail / bimetallic connection of a temperature controller is provided, which also makes it possible to use a welded connection of a bimetal with a material pairing which is also sensitive to a welding process, without disadvantageous effects due to the welding; especially on the thermal and mechanical load capacity and the long-term behavior of Bimertaflelements occurs.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Manufacture Of Switches (AREA)

Abstract

The bracket or bimetal connection has a bimetal element (20) which is connected with a fastening bracket (21), where the bimetal element acts on a spring combination (24) over a pin (25). The bimetal element is firmly connected outside its bending area (203) with the bracket at the connection point of the bimetal element and bracket, so that by the connection of bimetal element and bracket no change is produced in cross section of the bimetal element in its bending area. A copper-interlayer is provided between the active and passive layers. An independent claim is also included for a method for connecting a bracket.

Description

Die vorliegende Erfindung betrifft eine Bügel/Bimetallverbindung eines BimetallTemperaturreglers und ein Verfahren zur Herstellung einer Bügel/Bimetallverbindung eines Bimetalltemperaturreglers.The present invention relates to a bimetallic / bimetallic connection of a bimetallic temperature controller and to a method of making a bail / bimetallic connection of a bimetallic temperature controller.

Aus dem Stand der Technik sind Temperaturregler mit Bimetallstreifen hinlänglich bekannt. Eine schematische Darstellung eines herkömmlichen Bimetallreglers ist in Fig. 1 dargestellt. Ein herkömmliche Temperaturregler 1 umfaßt im allgemeinen einen S-förmigen Befestigungsbügel 11, an dem ein Betätigungselement 12 angeordnet ist, das über einen ersten Stift 13 auf eine Federkombination 14 wirkt, die ein Schaltelement 16 auslöst, das mit Kontakten 17 elektrisch verbunden ist, die von einem Isolierelement 18 gehalten werden, das ebenfalls an dem Bügel 11 1 angeordnet ist.Temperature regulators with bimetallic strips are well known from the prior art. A schematic representation of a conventional bimetallic regulator is shown in FIG Fig. 1 shown. A conventional temperature controller 1 generally comprises an S-shaped mounting bracket 11 on which an actuator 12 is arranged, which acts via a first pin 13 on a spring combination 14 which triggers a switching element 16 which is electrically connected to contacts 17, which an insulating member 18 are held, which is also arranged on the bracket 11 1.

Der Befestigungsbügel 11 umfaßt außerdem an seinem einen Ende eine Befestigungsbohrung 102 über die der Temperaturregler 1 an einem Anwendungsgerät befestigt werden kann. An diesem Ende des Bügels 11 ist ein Bimetall 10 an dem Bügel 11 angeordnet und mit dem Bügel 11 verbunden, das ebenfalls die Befestigungsbohrung 102 aufweist, und das über einen zweiten Stift 15 auf die Federkombination 14 wirkt, die das Schaltelement 16 schaltet. Das Bimetallelement 10 ist demnach mit seinem freien Ende 104 über den isolierenden zweiten Stift 15 mit der stromführenden als Schaltfeder wirkenden Federkombination 14 verbunden und überträgt seine thermische Krümmung auf die Federkombination 14.The mounting bracket 11 also includes at its one end a mounting hole 102 through which the temperature controller 1 can be attached to an application device. At this end of the bracket 11, a bimetal 10 is disposed on the bracket 11 and connected to the bracket 11, which also has the mounting hole 102, and acts via a second pin 15 on the spring combination 14, which switches the switching element 16. The bimetallic element 10 is thus connected with its free end 104 via the insulating second pin 15 with the current-carrying acting as a switching spring spring combination 14 and transmits its thermal curvature on the spring combination fourteenth

Es ist bekannt, daß die Verbindung von Bügel 11 und Bimetallelement 10 mittels vier Schweißpunkten durch Widerstandsschweißung ausgeführt werden kann. Hierbei sind bei einem herkömmlichen Temperaturregler 1 die Schweißpunkte 101 konzentrisch um die Befestigungsbohrung 102 des Bimetalls 10/Befestigungsbügels 11 derart angeordnet, daß jeweils zwei Schweißstellen 101, 101 in einer Linie nebeneinander dem freien Ende des Bimetallelements 12 zu- bzw. abgewandt sind.It is known that the connection of bracket 11 and bimetallic element 10 by means of four welds can be carried out by resistance welding. Here, in a conventional temperature controller 1, the welding points 101 concentrically arranged around the mounting hole 102 of the bimetal 10 / mounting bracket 11 such that two welds 101, 101 in a line next to each other the free end of the bimetallic element 12 or turned away.

Die beiden Schweißpunkte 101', die dem freien Ende des Bimetallelements 10 zugewandt sind liegen jedoch nachteilhaft in der Nähe des Materialquerschnitts des Bimetallelements 10, das die größte Biegespannung erfährt, wenn sich das Bimetallelement durch Erwärmung ausbiegt bzw. krümmt, wobei außerdem eine mechanische Kraft auf das freie Ende 104 des Bimetallelements 10 zum Beispiel durch die Federkombination 14 wirkt. Hierbei erfährt durch die Schweißung das Material des Bimetallelements 10 an dieser Stelle eine thermische sowie mechanische Beeinflussung, so daß sich die zulässigen Biegespannungen durch Relaxation des Materials sowie durch Querschnittsschwächung absenken. Die nachteilhafte Folge davon ist eine Veränderung der maximalen sowohl thermischen als auch mechanischen Belastungsfähigkeit des Bimetallelements 10 sowie außerdem eine kontinuierliche Veränderung der Belastungsfähigkeit des Bimetallelements 10 im Langzeitverhalten mit der Folge einer Drift des Schaltverhaltens.However, the two welding spots 101 'facing the free end of the bimetallic element 10 are disadvantageously close to the material cross section of the bimetallic element 10 which experiences the greatest bending stress when the bimetallic element bends or curves due to heating, and also has a mechanical force the free end 104 of the bimetallic element 10 acts, for example, by the spring combination 14. In this case, the material of the bimetal element 10 undergoes a thermal and mechanical influence at this point as a result of the welding, so that the permissible bending stresses are lowered by relaxation of the material and by weakening of the cross-section. The disadvantageous consequence of this is a change in the maximum both thermal and mechanical load capacity of the bimetallic element 10 as well as a continuous change in the load capacity of the bimetallic element 10 in the long-term behavior with the consequence of a drift of the switching behavior.

Diesem Effekt kann begegnet werden, indem entweder der Materialquerschnitt des Bimetallelements 10 vergrößert wird oder ein Material mit geeigneten höheren Eigenschaften des Elastizitätsmoduls bzw. der zulässigen Biegespannungen ausgewählt und verwendet wird.This effect can be counteracted either by increasing the material cross-section of the bimetal element 10 or by selecting and using a material with suitably higher properties of the modulus of elasticity or of the permissible bending stresses.

Für bestimmte Anwendungen ist es jedoch notwendig ein Bimetallelement einzusetzen, das mit einer Zwischenschicht aus Kupfer zwischen den beiden Metallkomponenten ausgelegt ist. Insbesondere diese Materialpaarung ist jedoch für den vorstehend beschriebenen Schweißprozeß kritisch, da die Kupferkomponente eine erhebliche Absenkung der Festigkeitswerte unter Temperatureinfluß bewirkt.For certain applications, however, it is necessary to use a bimetallic element which is designed with an intermediate layer of copper between the two metal components. In particular, however, this combination of materials is critical for the above-described welding process, since the copper component causes a significant reduction in the strength values under the influence of temperature.

Hierbei ist die Dicke der Kupferschicht für den Grad der Veränderung von Bedeutung.Here, the thickness of the copper layer for the degree of change of importance.

Aufgabe der vorliegenden Erfindung ist daher eine verbesserte Bügel/Bimetallverbindung für einen Temperaturregler bereitzustellen, die die vorstehend genannten Nachteile des Standes der Technik beseitigt und die es gestattet auch ein Bimetallelement mit einer gegenüber einem Schweißverfahren sensiblen Materialpaarung bereitzustellen. Weitere Aufgabe der vorliegenden Erfindung ist ein Verfahren zur Herstellung einer verbesserten Bügel/Bimetallverbindung bereitzustellen, das die vorstehend genannten Nachteile des Standes der Technik beseitigt und es gestattet auch ein Bimetallelement auszuwählen, das eine gegenüber einem Schweißverfahren sensible Materialpaarung umfaßt.It is therefore an object of the present invention to provide an improved bail / bimetallic connection for a temperature controller which overcomes the aforementioned drawbacks of the prior art and which also makes it possible to provide a bimetallic element with a material pairing sensitive to a welding process. Another object of the present invention is to provide a method of making an improved stirrup / bimetal connection which overcomes the aforementioned disadvantages of the prior art and also allows to select a bimetallic element comprising a material pairing sensitive to a welding process.

Die Aufgabe der vorliegenden Erfindung wird mit den Merkmalen von Anspruch 1 und 13 gelöst. Vorteilhafte Ausführungen der vorliegenden Erfindung sind in den Merkmalen der Unteransprüche und/oder der nachfolgenden Beschreibung genannt, die von schematischen Zeichnungen begleitet ist.The object of the present invention is achieved with the features of claims 1 and 13. Advantageous embodiments of the present invention are mentioned in the features of the subclaims and / or the following description, which is accompanied by schematic drawings.

Hierzu zeigt:This shows:

Fig. 1aFig. 1a
eine schematische perspektivische Darstellung eines herkömmlichen Temperaturreglers,a schematic perspective view of a conventional temperature controller,
Fig. 1bFig. 1b
den Temperaturregler von Fig. 1 aus einer anderen Perspektive undthe temperature controller of Fig. 1 from a different perspective and
Fig. 1cFig. 1c
eine Draufsicht auf den Temperaturregler von Fig. 1a und 1b;a plan view of the temperature controller of Fig. 1a and 1b ;
Fig. 2aFig. 2a
eine schematische perspektivische Darstellung eines Temperaturreglers mit einer erfindungsgemäßen Bügel/Bimetallverbindung,a schematic perspective view of a temperature controller with a bracket / bimetallic connection according to the invention,
Fig. 2bFig. 2b
den Temperaturregler von Fig. 2a aus einer anderen Perspektive undthe temperature controller of Fig. 2a from a different perspective and
Fig. 2cFig. 2c
den Temperaturregler von Fig. 2a und 2b von oben undthe temperature controller of Fig. 2a and 2b from above and
Fig. 3Fig. 3
eine Seitenansicht des Temperaturreglers von Fig. 2.a side view of the temperature controller of Fig. 2 ,

Eine erfindungsgemäße Bügel/Bimetallverbindung für einen Temperaturregler umfaßt insbesondere ein Bimetallelement, das mit einem Befestigungsbügel verbunden ist, wobei das Binnetallelement über einen Stift auf eine Federkombination wirkt, die ein Schaltelement auslöst und der Bügel ein Betätigungselement trägt, das über einen Stift ebenfalls auf die Federkombination wirkt, wobei an der Verbindungsstelle von Bimetallelement und Bügel das Bimetallelement lediglich außerhalb seines Biegebereiches mit dem Bügel fest verbunden ist, so daß durch die Verbindung von Bimetallelement und Bügel keine Querschnittsveränderung des Bimetallelements in seinem Biegebereich vorliegtA bow / bimetallic connection according to the invention for a temperature controller comprises in particular a bimetallic element which is connected to a mounting bracket, wherein the binnetallelement acts via a pin on a spring combination which triggers a switching element and the bracket carries an actuating element, which also acts on the spring combination via a pin acts, wherein at the juncture of bimetallic element and the bimetallic element is firmly connected only outside its bending range with the bracket, so that there is no cross-sectional change of the bimetallic element in its bending area by the connection of bimetallic element and bracket

Nach einer vorteilhaften Ausführung der vorliegenden Erfindung umfaßt das Bimetallelement hierbei ein Bimetall mit einer Kupferzwischenlage zwischen seiner aktiven und passiven Schicht, wobei die Kupferzwischenlage vorteilhaft in einer Größenordnung von 10 bis 60% der Gesamtdicke des Bimetallelements vorliegt.According to an advantageous embodiment of the present invention, the bimetallic element in this case comprises a bimetal with a copper interlayer between its active and passive layer, wherein the copper interlayer is advantageously present in the order of 10 to 60% of the total thickness of the bimetallic element.

Nach einer weiteren vorteilhaften Ausführung der vorliegenden Erfindung sind der Befestigungsbügel und das Bimetallelement an ihrer Verbindungsstelle miteinander verschweißt, wobei die Verschweißung insbesondere vorteilhaft mittels Laserschweißen oder Widerstandsschweissen bereitgestellt sein kann.According to a further advantageous embodiment of the present invention, the mounting bracket and the bimetallic element are welded together at their connection point, wherein the welding can be provided in particular advantageously by means of laser welding or resistance welding.

Bei einer weiteren vorteilhafte Ausführung der vorliegenden Erfindung umfaßt die Verbindungsstelle von Befestigungsbügel und Bimetallelement eine Befestigungsbohrung zur Befestigung des Temperaturschalters an einem Anwendungsgerät, wobei wenigstens ein Schweißpunkt zur Verbindung des Bimetallelements mit dem Befestigungsbügel an einer Position vorgesehen ist, die von dem Biegebereich und insbesondere von dem Bereich beabstandet ist, in dem das Bimetall die größte Biegespannung erfährt, wobei die Befestigungsbohrung vorteilhaft zwischen Biegebereich und Schweißpunkt angeordnet ist.In a further advantageous embodiment of the present invention, the connection point of mounting bracket and bimetallic element comprises a mounting hole for attachment of the temperature switch to an application device, wherein at least one welding point for connecting the bimetallic element is provided with the mounting bracket at a position of the bending area and in particular of the Area is spaced, in the the bimetal experiences the greatest bending stress, wherein the mounting hole is advantageously arranged between the bending region and welding point.

Nach einer weiteren vorteilhaften Ausführung der vorliegenden Erfindung ist das Bimetall derart an dem Befestigungsbügel angeordnet und mit dem Befestigungsbügel verbunden, daß die passive Metallseite die Schweißseite des Bimetallelements bildet, wobei insbesondere vorteilhaft die Materialdicke der passiven Seite gleich groß oder größer als die Materialdicke der aktiven Seite sein kann.According to a further advantageous embodiment of the present invention, the bimetal is arranged on the mounting bracket and connected to the mounting bracket, that the passive metal side forms the welding side of the bimetal, wherein particularly advantageously the material thickness of the passive side is equal to or greater than the material thickness of the active side can be.

Nach einer weiteren vorteilhaften Ausführung der vorliegenden Erfindung sind der Bügel und das Bimetallelements derart miteinander verschweißt, daß sie an ihrer Verbindungsstelle etwa 0 mm bis 0.1 mm voneinander beabstandet sind, wobei insbesondere vorteilhaft der Bügel und das Bimetallelement ohne Luftspalt Bündig aufeinander liegen.According to a further advantageous embodiment of the present invention, the bracket and the bimetallic element are welded together such that they are spaced at their junction about 0 mm to 0.1 mm apart, in particular advantageously the bracket and the bimetallic without air gap flush lie on each other.

Nach einer weiteren vorteilhaften Ausführung der vorliegenden Erfindung ist die Verbindung von Bimetallelement und Bügel vorteilhaft mittels Laserschweißung oder Widerstandsschweißung außerhalb des Bereichs der größten Biegespannung des Bimetalls ausgebildet.According to a further advantageous embodiment of the present invention, the connection of bimetallic element and bracket is advantageously formed by means of laser welding or resistance welding outside the range of the greatest bending stress of the bimetal.

Nach einer weiteren vorteilhaften Ausführung der vorliegenden Erfindung ist die Verbindung von Bimetallelements und Bügel als Nahtschweißung außerhalb des Bereichs der größten Biegespannung des Bimetallelements zwischen Bimetallelement und Bügel ausgebildet, wobei klar ist, daß auch eine Kombination mit der vorstehend genannten Punktschweißung eine weiter verstärkte Verbindung bereitstellen kann.According to a further advantageous embodiment of the present invention, the connection of bimetallic elements and stirrups is designed as a seam weld outside the range of the greatest bending stress of the bimetallic element between bimetallic element and bracket, it being understood that a combination with the above-mentioned spot welding can provide a further reinforced connection ,

Die vorliegende Erfindung betrifft außerdem insbesondere ein Verfahren zur Verbindung eines Bügels und eines Bimetallelements bei der Herstellung eines Temperaturreglers, das es gestattet, die vorstehend genannten Merkmale einer vorteilhaften erfindungsgemäßen Bügel/Bimetallverbindung für einen Temperaturregler bereitzustellen, wobei insbesondere der Bügel und das Bimetallelement nur an wenigstens einer Position außerhalb des Biegebereichs und insbesondere außerhalb des Bereichs der größten Biegespannung des Bimetallelements miteinander verschweißt werden.The present invention also relates in particular to a method for connecting a yoke and a bimetallic element in the manufacture of a temperature controller, which makes it possible to provide the above-mentioned features of an advantageous bracket / bimetal connection according to the invention for a temperature controller, wherein in particular the yoke and the Bimetallic element are welded together only at least one position outside the bending region and in particular outside the range of the greatest bending stress of the bimetallic element.

Mittels den vorstehend genannten Ausführungen der vorliegenden Erfindung kann zuverlässig eine Bügel/Bimetallverbindung eines Temperaturreglers bereitgestellt werden, bei der trotz einer Schweißverbindung von Bügel und Bimetall das Material des Bimetalls keine thermische oder mechanische Beeinflussung durch eine Schweißverbindung erfährt, wonach auch die zulässigen Biegespannungen durch Relaxation des Materials sowie durch Querschnittsschwächung nicht absinken, und wonach außerdem die maximale sowohl thermische als auch mechanische Belastungsfähigkeit keine Veränderung erfährt und außerdem keine kontinuierliche Veränderung der Belastungsfähigkeit im Langzeitverhalten auftritt und demnach auch keine Drift der Schaltpunkte auftritt.By means of the abovementioned embodiments of the present invention, it is possible reliably to provide a stirrup / bimetallic connection of a temperature regulator, in which, despite a welded connection of the stirrup and bimetal, the material of the bimetal does not undergo thermal or mechanical influence by a welded connection, after which the permissible bending stresses are also released by relaxation of the Material as well as by cross-sectional weakening does not fall, and also that the maximum both thermal and mechanical load capacity undergoes no change and also no continuous change in the load capacity in long-term behavior occurs and therefore no drift of the switching points occurs.

Mittels der vorstehend genannten erfindungsgemäßen Bügel/Bimetallverbindung und dem vorstehend genannten erfindungsgemäßen Verfahren zur Herstellung einer Bügel/Bimetallverbindung für einen Temperaturregler ist es außerdem vorteilhaft möglich ein Bimetall mit einer für einen Schweißprozeß sensiblen Materialpaarung und insbesondere ein Bimetall mit einer Zwischenschicht aus Kupfer zu verwenden.By means of the abovementioned bracket / bimetal connection according to the invention and the abovementioned method according to the invention for producing a bracket / bimetallic connection for a temperature controller, it is also advantageously possible to use a bimetal with a material pairing sensitive to a welding process and in particular a bimetal with an intermediate layer of copper.

Ein vorteilhaftes Ausführungsbeispiel der vorliegenden Erfindung wird nachfolgend mit Bezugnahme auf die Fig. 2 und 3 beschrieben.An advantageous embodiment of the present invention will be described below with reference to FIGS Fig. 2 and 3 described.

Fig. 2a zeigt eine schematische perspektivische Darstellung eines Temperaturreglers 2 mit einer erfindungsgemäßen Bügel/Bimetallverbindung, Fig. 2b zeigt den Temperaturregler 2 von Fig. 2a aus einer anderen Perspektive, und Fig. 2c zeigt den Temperaturregler von Fig. 2a und 2b von oben, und Fig. 3 zeigt eine schematische Seitenansicht des Temperaturreglers von Fig. 2. Fig. 2a shows a schematic perspective view of a temperature controller 2 with a bracket / bimetal connection according to the invention, Fig. 2b shows the temperature controller 2 of Fig. 2a from a different perspective, and Fig. 2c shows the temperature controller of Fig. 2a and 2b from above, and Fig. 3 shows a schematic side view of the temperature controller of Fig. 2 ,

Der in den Fig. 2 und 3 dargestellte Temperaturregler 2 mit der erfindungsgemäßen Bügel/Bimetallverbindung umfaßt einen Befestigungsbügei 21, der mit einem Bimetallelement 20 verbunden ist, wobei der Befestigungsbügel 21 auf geeignete Weise gebogen ist, und wobei an dem Befestigungsbügel 21 ein Betätigungselement 22 angeordnet ist, das über einen ersten Stift 23 auf eine Federkombination 24 wirkt, die ein Schaltelement 26 auslöst, das mit Kontakten 27 elektrisch verbunden ist, die von einem Isolierelement 28 gehalten werden, das ebenfalls an dem Bügel 21 angeordnet ist.The in the Fig. 2 and 3 illustrated temperature controller 2 with the bracket / bimetallic connection according to the invention comprises a Befestigungsbügei 21, with a Bimetallic element 20 is connected, wherein the mounting bracket 21 is bent in a suitable manner, and wherein on the mounting bracket 21, an actuating element 22 is arranged, which acts via a first pin 23 on a spring combination 24 which triggers a switching element 26, which electrically contacts 27 is connected, which are held by an insulating member 28 which is also arranged on the bracket 21.

Der Befestigungsbügel 21 umfaßt außerdem an seinem einen Ende eine Befestigungsbohrung 202 über die der Temperaturregler 2 an einem Anwendungsgerät befestigt werden kann. An diesem Ende des Befestigungsbügels 21 ist ein Bimetall 20 an dem Bügel 21 angeordnet und mit dem Bügel 21 verbunden, wobei das Bimetall 20 ebenfalls die Befestigungsbohrung 202 aufweist, und wobei das Bimetallelement 20 über einen zweiten isolierenden Stift 25 auf die Federkombination 24 wirkt, die das Schaltelement 26 schaltet. Hierbei ist das Bimetallelement 20 mit seinem freien Ende 204 über den isolierenden zweiten Stift 25 mit der stromführenden als Schaltfeder wirkenden Federkombination 24 verbunden und überträgt seine thermische Krümmung auf die Federkombination 24.The mounting bracket 21 also includes at its one end a mounting hole 202 through which the temperature controller 2 can be attached to an application device. At this end of the mounting bracket 21, a bimetal 20 is disposed on the bracket 21 and connected to the bracket 21, wherein the bimetal 20 also has the mounting hole 202, and wherein the bimetallic element 20 acts via a second insulating pin 25 on the spring combination 24, the the switching element 26 switches. Here, the bimetallic element 20 is connected with its free end 204 via the insulating second pin 25 with the current-carrying acting as a switching spring spring combination 24 and transmits its thermal curvature on the spring combination 24th

Erfindungsgemäß ist das Bimetallelement 20 mittels Schweißverbindung mit dem Befestigungsbügel 21 verbunden und zwar insbesondere vorteilhaft mittels Laserschweißverfahren oder Widerstandsschweißen und außerdem insbesondere vorteilhaft mittels Schweißpunkten 201, die von dem Biegebereich des Bimetallelements derart beabstandet sind, daß durch die Verbindung von Bimetallelement und Befestigungsbügel keine Querschnittsveränderung des Bimetallelements in seinem Biegebereich vorliegt und insbesondere kein Einfluss der Schweißverbindung auf den Bereich der größten Biegespannung 203 des Bimetallelements 20 auftritt, der unmittelbar in der Nähe der Verbindung von Bimetallelement 20 und Befestigungsbügel 21 liegt und gegenüber dem freien Ende 204 des Bimetallelements 20 liegt.According to the bimetallic element 20 is connected by welding to the mounting bracket 21 and in particular advantageously by laser welding or resistance welding and also particularly advantageous by means of welds 201, which are spaced from the bending region of the bimetallic element so that no cross-sectional change of the bimetallic element by the connection of bimetallic element and mounting bracket is present in its bending region and in particular no influence of the weld on the region of the greatest bending stress 203 of the bimetallic element 20 occurs, which is located directly in the vicinity of the connection of bimetallic element 20 and mounting bracket 21 and against the free end 204 of the bimetallic element 20.

Alternativ und/oder zusätzlich zu dem vorstehend beschriebenen wenigstens einem Schweißpunkt 201, der vorteilhaft und erfindungsgemäß aus Sicht des freien Endes des Bimetallelements 204 und dem Bereich der größten Biegespannung 203 des Bimetallelements 20 gegenüber der Befestigungsbohrung 202 angeordnet ist, kann außerdem und/oder zusätzlich vorteilhaft eine in den Zeichnungen nicht dargestellte Nahtschweißung an dem Befestigungsende zwischen dem Bimetallelements 20 und dem Befestigungsbügel 21 zur Befestigung des Bimetallelements 20 an dem Bügel 21 ausgebildet sein.Alternatively and / or in addition to the above-described at least one welding point 201, which advantageously and according to the invention from the viewpoint of the free end of the bimetallic element 204 and the region of greatest bending stress 203 of Bimetallic element 20 is arranged opposite the mounting hole 202, may also and / or additionally advantageously not shown in the drawings seam welding at the attachment end between the bimetallic element 20 and the mounting bracket 21 for attachment of the bimetallic element 20 may be formed on the bracket 21.

Wie vorstehend gesagt ist mit einer vorteilhaften Ausführung der vorliegenden Erfindung nach Fig. 2 und 3 eine Bügel/Bimetallverbindung eines Temperaturreglers bereitgestellt, die es ermöglicht auch eine Schweißverbindung auch eines Bimetalls mit einer auch für einen Schweißprozeß sensiblen Materialpaarung zu verwenden, ohne daß durch das Schweißen nachteilige Effekte; insbesondere auf die thermische und mechanische Belastungsfähigkeit und das Langzeitverhalten des Bimertaflelements auftritt.As stated above, with an advantageous embodiment of the present invention after Fig. 2 and 3 a bail / bimetallic connection of a temperature controller is provided, which also makes it possible to use a welded connection of a bimetal with a material pairing which is also sensitive to a welding process, without disadvantageous effects due to the welding; especially on the thermal and mechanical load capacity and the long-term behavior of Bimertaflelements occurs.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Temperaturreglerthermostat
11
Bimetallbimetallic
1010
Schweißpunktewelds
101, 101101, 101
Befestigungsbohrungmounting hole
102102
Biegebereichbending area
103103
Freies EndeFree end
104104
Bügelhanger
1111
Betätigungselementactuator
1212
erster Stiftfirst pen
1313
Federkombinationspring combination
1414
zweiter Stiftsecond pen
1515
Schaltelementswitching element
1616
Kontaktecontacts
1717
Isolierelementinsulating
1818
Temperaturreglerthermostat
22
Bimetallbimetallic
2020
Schweißpunktewelds
201201
Befestigungsbohrungmounting hole
202202
Biegebereichbending area
203203
Freies EndeFree end
204204
Bügelhanger
2121
Betätigungselementactuator
2222
erster Stiftfirst pen
2323
Federkombinationspring combination
2424
zweiter Stiftsecond pen
2525
Schaltelementswitching element
2626
Kontaktecontacts
2727
Isolierelementinsulating
2828

Claims (14)

. Bügel/Bimetallverbindung für einen Temperaturregler (2), mit:
einem Bimetallelement (20), das mit einem Befestigungsbügel (21) verbunden ist, wobei das Bimetallelement (20) über einen Stift (25) auf eine Federkombination (24) wirkt, die ein Schaltelement (26) auslöst und der Bügel (21) ein Betätigungselement (22) trägt, das über einen Stift (23) ebenfalls auf die Federkombination (24) einwirkt, und wobei an der Verbindungsstelle von Bimetallelement (20) und Bügel (21) das Bimetallelement (20) lediglich außerhalb seines Biegebereiches (203) mit dem Bügel (21) fest verbunden ist, so daß durch die Verbindung von Bimetallelement (20) und Bügel (21) keine Querschnittsveränderung des Bimetallelements (20) in seinem Biegebereich vorlegt, Bracket / bimetal connection for a temperature controller (2), with:
a bimetallic element (20) which is connected to a mounting bracket (21), wherein the bimetallic element (20) acts via a pin (25) on a spring combination (24) which triggers a switching element (26) and the bracket (21) Actuator (22) carries, which acts via a pin (23) also on the spring combination (24), and wherein at the junction of bimetallic element (20) and bracket (21) the bimetallic element (20) only outside of its bending region (203) the bracket (21) is firmly connected, so that presents no cross-sectional change of the bimetallic element (20) in its bending region by the connection of bimetallic element (20) and bracket (21) . Bügel/Bimetallverbindung nach Anspruch 1, wobei:
das Bimetallelement (20) umfaßt ein Bimetall mit einer Cu-Zwischenlage zwischen der aktiven und passiven Schicht., A bracket / bimetal connection according to claim 1, wherein:
the bimetal element (20) comprises a bimetal with a Cu interlayer between the active and passive layers. . Bügel/Bimetallverbindung nach Anspruch 2, wobei:
die Cu-Zwischenlage ist in einer Größenordnung von 10% bis 60% der Gesamtdicke des Bimetalielements (20)., A bracket / bimetal connection according to claim 2, wherein:
the Cu interlayer is on the order of 10% to 60% of the total thickness of the bimetallic element (20). . Bügel/Bimetallverbindung nach einem der Ansprüche 1 bis 3, wobei:
der Befestigungsbügel (21) und das Birrtetallelement (20) sind an ihrer Verbindungsstelle miteinander verschweißt., A bracket / bimetal connection according to any one of claims 1 to 3, wherein:
the mounting bracket (21) and the Birrtetallelement (20) are welded together at their junction. . Bügel/Bimetallverbindung nach Anspruch 4, wobei:
die Verbindungsstelle von Befestigungsbügel (21) und Bimetallelement (20) umfaßt eine Befestigungsbohrung (202) zur Befestigung des Temperaturschalters (2) an einem Anwendungsgerät, und wenigstens ein Schweißpunkt (201) zur Verbindung des Bimetallelements (20) mit dem Befestigungsbügel (21) ist an einer Position vorgesehen, die von dem Biegebereich (203) des Bimetallelements (20) beabstandet ist, wobei die Befestigungsbohrung (202) zwischen Biegebereich (203) und Schweißpunkt (201) angeordnet ist., A bracket / bimetal connection according to claim 4, wherein:
the connection point of mounting bracket (21) and bimetallic element (20) comprises a mounting hole (202) for attaching the temperature switch (2) to an application device, and at least one welding point (201) for connecting the bimetallic element (20) with the mounting bracket (21) provided at a position which is spaced from the bending region (203) of the bimetallic element (20), wherein the mounting hole (202) between the bending region (203) and welding point (201) is arranged. . Bügel/Bimetallverbindung nach einem der Ansprüche 1 bis 5, wobei:
die passive Metallseite des Bimetallelements (20) ist die Schweißseite., A stirrup / bimetal connection according to any one of claims 1 to 5, wherein:
the passive metal side of the bimetallic element (20) is the welding side. . Bügel/Bimetallverbindung nach einem der Ansprüche 4 bis 6, wobei:
die Materialdicke der passiven Seite ist gleich groß oder größer als die Materialdicke der aktiven Seite., A bracket / bimetal connection according to any one of claims 4 to 6, wherein:
the material thickness of the passive side is equal to or greater than the material thickness of the active side. . Bügel/Bimetallverbindung nach einem der Ansprüche 4 bis 7, wobei:
der Bügel (21) und das Bimetallelement (20) sind derart miteinander verschweißt, daß sie an ihrer Verbindungsstelle 0 mm bis 0.1 mm beabstandet sind., A bracket / bimetal connection according to any one of claims 4 to 7, wherein:
the bracket (21) and the bimetallic element (20) are welded together such that they are at their junction 0 mm to 0.1 mm apart. . Bügel/Bimetallverbindung nach einem der Ansprüche 4 bis 8, wobei:
der Bügel (21) und das Bimetallelement (20) sind derart miteinander verschweißt, daß der Bügel (21) und das Bimetallelement (20) ohne Luftspalt bündig aufeinander liegen., A bracket / bimetal connection according to any one of claims 4 to 8, wherein:
the bracket (21) and the bimetallic element (20) are welded together so that the bracket (21) and the bimetallic element (20) are flush with each other without an air gap. . Bügel/Bimetallverbindung nach einem der Ansprüche 4 bis 9, wobei:
der Bügel (21) und das Bimetallelement (20) sind mittels Laserschweißen oder Widerstandsschweißen miteinander verbunden., A bracket / bimetal connection according to any one of claims 4 to 9, wherein:
the bracket (21) and the bimetallic element (20) are connected to each other by means of laser welding or resistance welding. . Bügel/Bimetallverbindung nach einem der Ansprüche 4 bis 10, wobei die Laserschweißung ist als Punktschweißung zur Verbindung von Bimetallelements (20) und Bügel (21) außerhalb des Bereichs der größten Biegespannung des Bimetallelements (20) ausgebildet., The bracket / bimetal connection according to any one of claims 4 to 10, wherein the laser welding is formed as a spot weld for connecting bimetallic elements (20) and yokes (21) outside the range of the greatest bending stress of the bimetallic element (20). . Bügel/Bimetallverbindung nach einem der Ansprüche 4 bis 11, wobei:
die Laserschweißung ist als Nahtschweißung zur Verbindung von Bimetallelement (20) und Bügel (21) außerhalb des Bereichs der größten Biegespannung des Bimetallelements (20) zwischen Bimetallelement (20) und Bügel (21) ausgebildet.., A bracket / bimetal connection according to any one of claims 4 to 11, wherein:
the laser welding is formed as a seam weld for connecting bimetallic element (20) and bracket (21) outside the range of the greatest bending stress of the bimetallic element (20) between the bimetallic element (20) and bracket (21). . Verfahren zur Verbindung eines Bügels (21) und eines Bimetallelements (20) bei der Herstellung eines Temperaturreglers (2) mit den Merkmalen von Anspruch 1, wobei der Bügel (1) und das Bimetallelement (20) nur an wenigstens einer Position außerhalb des Biegebereichs (203) des Bimetallelements (20) miteinander verschweißt werden., Method for connecting a yoke (21) and a bimetallic element (20) in the manufacture of a temperature regulator (2) with the features of claim 1, wherein the yoke (1) and the bimetallic element (20) are only in at least one position outside the bending region ( 203) of the bimetallic element (20) are welded together. . Verfahren nach Anspruch 13 mit dem eine Bügel/Bimetallverbindung nach einem der Ansprüche 2-13 bereitgestellt wird., A method according to claim 13, wherein a yoke / bimetal connection according to any one of claims 2-13 is provided.
EP10155417.8A 2009-03-27 2010-03-04 Frame/bimetal connection and method for producing same Active EP2234138B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910014712 DE102009014712A1 (en) 2009-03-27 2009-03-27 Bracket / bimetallic connection and method of manufacture

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EP2234138A2 true EP2234138A2 (en) 2010-09-29
EP2234138A3 EP2234138A3 (en) 2013-01-09
EP2234138B1 EP2234138B1 (en) 2015-09-23

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EP (1) EP2234138B1 (en)
CN (1) CN101847018B (en)
DE (1) DE102009014712A1 (en)
ES (1) ES2550266T3 (en)

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EP2511930A1 (en) * 2011-04-13 2012-10-17 TMC Sensortechnik GmbH Temperature protective switch
EP3561847A1 (en) * 2018-04-23 2019-10-30 AuOne Electronic Manufacturing Limited Switch with high-safety lever structure

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CN87207382U (en) * 1987-08-06 1988-03-09 江西省崇仁节能电器厂 Bimetal overheat protector

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Publication number Priority date Publication date Assignee Title
EP2511930A1 (en) * 2011-04-13 2012-10-17 TMC Sensortechnik GmbH Temperature protective switch
EP2511930B1 (en) 2011-04-13 2016-01-20 TMC Sensortechnik GmbH Temperature protective switch
DE102011016896C5 (en) * 2011-04-13 2016-10-27 Tmc Sensortechnik Gmbh Thermostatic switch
EP3561847A1 (en) * 2018-04-23 2019-10-30 AuOne Electronic Manufacturing Limited Switch with high-safety lever structure

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ES2550266T3 (en) 2015-11-05
CN101847018A (en) 2010-09-29
DE102009014712A1 (en) 2010-10-07
EP2234138A3 (en) 2013-01-09
CN101847018B (en) 2014-03-05
EP2234138B1 (en) 2015-09-23

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