CN101847018B

CN101847018B - Bracket/bimetal connection and method for producing same

Info

Publication number: CN101847018B
Application number: CN201010133204.4A
Authority: CN
Inventors: 赫尔曼·G·科勒
Original assignee: INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Current assignee: INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Priority date: 2009-03-27
Filing date: 2010-03-26
Publication date: 2014-03-05
Anticipated expiration: 2030-03-26
Also published as: EP2234138B1; CN101847018A; ES2550266T3; EP2234138A3; DE102009014712A1; EP2234138A2

Abstract

A bracket or bimetal connection for a temperature switch has a bimetal element which is connected with a fastening bracket, where the bimetal element acts on a spring combination over a pin. The bracket is carried with an acting element acting on the spring combination over a pin. The bimetal element is firmly connected outside its bending area 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.

Description

Bow type part/bimetal piece connector and manufacture method thereof

Technical field

The present invention relates to a kind of bow type part/bimetal piece connector of bi-metal temperature controller, and a kind of manufacture method of bow type part/bimetal piece connector of bi-metal temperature controller.

Background technology

In prior art field, the temperature controller with bimetallic strip is known.The schematic diagram of common bimetal controller as shown in Figure 1.Common temperature controller 1 generally includes the fixing with bow type part (fastening bow) 11 of S shape, actuation element 12 is arranged on this fixing using on bow type part 11, actuation element 12 acts in reed group 14 by the first pin 13, reed group 14 trigger switch elements 16, on-off element 16 is electrically connected to contact 17, and contact 17 is arranged on fixing with insulation component 18 maintenances on bow type part 11.

Fix and also comprise with bow type part 11 fixed orifice 102 that is positioned at one end thereof place, temperature controller 1 can be attached on application apparatus by this fixed orifice 102.In this end of bow type part 11, the bimetallic element 10 equally with connecting hole 102 is arranged on bow type part 11 and with this bow type part 11 and is connected, and bimetallic element 10 acts in the reed group 14 of trigger switch element 16 by the second pin 15.Therefore bimetallic element 10 is sold 15 by second of insulation and is connected with the current-carrying reed group 14 as switch spring on its free end 104, and the thermal deformation of self is delivered to reed group 14.

As everyone knows, the connection of bow type part 11 and bimetallic element 10 can utilize four solder joints to realize by resistance welded.At this, for common temperature controller 1, solder joint 101 arranges with one heart around the fixing fixed orifice 102 with bow type part 11 of bimetallic element 10/, thereby form 101,101 ', two pads of each two pads located adjacent one another side by side 101,101 ' respectively near or away from the free end of bimetallic element 10.

Yet, when bimetallic element is because intensification is out of shape or when crooked, free-ended two pads 101 ' of close bimetallic element 10 are adversely very near the material cross-section that stands the bimetallic element 10 of maximum stress in bend, and mechanical force is such as also act on the free end 104 of bimetallic element 10 by reed group 14.At this, the material of bimetallic element 10 is influenced by heat at this pad place and power impact, due to the reduction lax and xsect of material make can load bending stress reduce.The unfavorable result of bringing is thus the maximum heat load of bimetallic element 10 and the variation of maximum machine load, and the drift of simultaneously also in addition using due to switch makes aspect long period of operation, and the load capacity of bimetallic element 10 does not stop to change.

This impact can be offset by increasing the material cross-section of bimetallic element 10, or by choice and operation, is adapted at Young modulus or bending stress aspect that can load respectively and has the more material of high target and offset.

But, for some application, must use between two metal constituent elements the bimetallic element with this kind of design in copper middle layer.Yet because copper constituent element can cause mechanical property significantly to reduce under temperature impact, therefore this certain material combinations is very harsh for the condition that adopts above-mentioned welding method.At this, the thickness in copper middle layer is relevant to intensity of variation.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of improved bow type part/bimetal piece connector for temperature controller, it has overcome above-mentioned deficiency of the prior art, and a kind of bimetallic element with the combination of materials that is easy to adopt welding method is provided.The manufacture method that another object of the present invention is to provide a kind of improved bow type part/bimetal piece connector, it has overcome above-mentioned deficiency of the prior art, and can select a kind of bimetallic element that comprises the combination of materials that is easy to adopt welding method.

The object of the invention is that feature by claim 1 and 13 realizes.

Preferred embodiment of the present invention provides by the feature of dependent claims and/or following explanation by reference to the accompanying drawings.

Accompanying drawing explanation

Fig. 1 a is the stereographic map of common temperature controller,

Fig. 1 b is another stereographic map of the temperature controller shown in Fig. 1 a, and

Fig. 1 c is the vertical view of the temperature controller shown in Fig. 1 a and Fig. 1 b;

Fig. 2 a is the stereographic map having according to the temperature controller of bow type/bimetal piece connector of the present invention,

Fig. 2 b is another stereographic map of the temperature controller shown in Fig. 2 a, and

Fig. 2 c is the vertical view of the temperature controller shown in Fig. 2 a and Fig. 2 b; And

Fig. 3 is the side view of the temperature controller shown in Fig. 2 a, Fig. 2 b and Fig. 2 c.

Main element description of symbols:

Temperature controller 1 bimetallic element 10

Solder joint 101,101 ' fixed orifice 102

Crooked position 103 free ends 104

Bow type part 11 actuation elements 12

The first pin 13 reed groups 14

The second pin 15 on-off elements 16

Contact 17 insulation components 18

Temperature controller 2 bimetallic elements 20

Solder joint 201 fixed orifices 202

Crooked position 203 free ends 204

Bow type part 21 actuation elements 22

The first pin 23 reed groups 24

The second pin 25 on-off elements 26

Contact 27 insulation components 28

Embodiment

Bow type part/bimetal piece connector for temperature controller according to the present invention comprises being especially connected to fixes the bimetallic element of using bow type part, wherein bimetallic element acts in the reed group of trigger switch element by pin, this bow type part carries by pin and acts on the functional element (effecting element) in reed group, linkage interface at bimetallic element and bow type part, bimetallic element is only fastenedly connected in the outside of its crooked position to fixing with bow type part, thereby after bimetallic element is connected with bow type part, bimetallic element there will not be variation at the xsect at its connecting portion place.

According to a preferred embodiment of the present invention, bimetallic element comprises the thermometal in the copper middle layer having between active layers and passive layer, wherein the thickness in copper middle layer be preferably about bimetallic element gross thickness 10%～60%.

Another preferred embodiment according to the present invention, fixes and is welded together at its linkage interface place with bow type part and bimetallic element, wherein, is welded to connect and especially preferably adopts laser bonding or electric resistance welding to fetch realization.

Another preferred embodiment according to the present invention, fix and comprise for temperature switch being fixed to the fixed orifice of application apparatus with the linkage interface of bow type part and bimetallic element, wherein departing from bend bit position, especially in the position of departing from bimetallic element and stand maximum stress in bend position, be provided with at least one for connecting bimetallic element and fixing solder joint with bow type part, wherein fixed orifice is preferably disposed between crooked position and solder joint.

Another preferred embodiment according to the present invention, bimetallic element is arranged on fixing with being connected with bow type part on bow type part and with fixing, make passive metal covering form the face of weld of bimetallic element, especially, wherein the material thickness of passive can preferably be equal to or greater than the material thickness of active surface.

Another preferred embodiment according to the present invention, bow type part and bimetallic element are welded to one another, they are offset approximately between 0～0.1mm on its linkage interface, and especially, wherein bow type part and bimetallic element are preferably, accurately and there is no Di top of each other, space Shang Jie circle.

Another preferred embodiment according to the present invention, the connection between bow type part and bimetallic element is to adopt laser bonding or resistance welded to obtain by the outside at the maximum stress in bend position at bimetallic element.

Another preferred embodiment according to the present invention, connection between bimetallic element and bow type part is by the outside employing at the maximum stress in bend position of the bimetallic element between bimetallic element and bow type part, to stitch weldering to obtain, and wherein in conjunction with above-mentioned spot welding, also can obtain further and reinforce the connection obviously.

The present invention also relate in particular to a kind of in manufacturing temperature switch process for connecting the method for bow type part and bimetallic element, this temperature switch have for temperature controller, the above-mentioned preferable feature of bow type part/bimetal piece connector preferably, wherein especially, bow type part and bimetallic element be in the outside of bimetallic element crooked position, especially at least one position in the outside at bimetallic element maximum stress in bend position, welds together.

Pass through the above embodiment of the present invention, bow type part/bimetal piece connector of temperature controller can obtain reliably, although wherein bow type part and bimetallic element are to be welded to connect, but the material of bimetallic element is not influenced by heat or stressing influence by being welded to connect, make can load bending stress not because the reduction lax and xsect of material reduces, make further maximum heat load and maximum machine load-carrying ability not change, and further aspect long period of operation, load capacity does not stop to change, therefore, do not produce the drift phenomenon of switching point.

By above-mentioned according to bow type part/bimetal piece connector of the present invention with for the manufacture method of bow type part/bimetal piece connector of temperature controller, further preferably can use the thermometal with the combination of materials that is easy to adopt welding method, especially can use the metal with copper middle layer.

With reference to Fig. 2 a～Fig. 2 c, Fig. 3, the preferable examples of embodiment of the present invention is described below.

Fig. 2 a is the stereographic map having according to the temperature controller 2 of bow type part/bimetal piece connector of the present invention, and Fig. 2 b is another stereographic map of the temperature controller shown in Fig. 2 a, and Fig. 2 c is the vertical view of the temperature controller shown in above Fig. 2 a and Fig. 2 b; Fig. 3 is the side view of the temperature controller shown in Fig. 2 a～Fig. 2 c.

Temperature controller 2 has according to bow type part/bimetal piece connector of the present invention, bow type part/bimetal piece connector shown in Fig. 2 a～Fig. 2 c and Fig. 3 comprises the fixing bow type part 21 of using that is connected to bimetallic element 20, wherein fixing suitably crooked with bow type part 21, actuation element 22 is arranged on fixing with on bow type part 21, actuation element 22 acts in the reed group 24 of trigger switch element 26 by the first pin 23, on-off element 26 is electrically connected to contact 27, and the insulating element 28 that contact 27 is arranged on bow type part 21 keeps.

Fix and also comprise with bow type part 21 fixed orifice 202 that is positioned at one end thereof place, temperature controller 2 can attach on application apparatus by fixed orifice 202.In fixing this end with bow type part 21, the bimetallic element 20 equally with fixed orifice 202 is arranged on fixing using on bow type part 21 and with fixing and is connected with bow type part 21, and bimetallic element 20 acts in the reed group 24 of trigger switch element 26 by the second pin 25.Therefore, bimetallic element 20 is connected with the current-carrying reed group 24 as switch spring by the second pin 25 of insulation on its free end 204, and the thermal deformation of self is delivered to reed group 24.

According to the present invention, bimetallic element 20 especially preferably passes through laser bonding or resistance welded by being welded to connect to fixing with bow type part 21, and further preferably by deviating from solder joint 201 welding of the crooked position of bimetallic element; By this kind of bimetallic element and the fixing connection with bow type part, make the xsect at its crooked position place at bimetallic element there will not be variation, in particular, for bimetallic element 20 from weld part 203 not impacts to maximum stress in bend position.Wherein, maximum stress in bend position 203 is positioned to very close bimetallic element 20 and the fixing weld part with bow type part 21, and maximum stress in bend position 203 is positioned to relative with the free end 204 of bimetallic element 20.

For the above-mentioned alternative and/or further embodiment mentioning, when the free end that is positioned at maximum stress in bend position 203 204 from bimetallic element 20, according at least one solder joint 201 of the present invention, can preferably be oppositely arranged with fixed orifice 202, further and/or in addition preferably, can and fixingly with weld (not shown) on the fastening end between bow type part 21 by seam, for being fastened to, fix on use bow type part 21 bimetallic element 20 at bimetallic element 20.

As mentioned before, the thermometal that bow type part/bimetal piece connector of the temperature controller of mentioning according to the preferred embodiment of the present invention shown in Fig. 2 a～Fig. 2 c and Fig. 3 also can have by being welded to connect a kind of like this combination of materials forms: this combination of materials is easy to adopt welding method, especially in the long-term use of heat load, mechanical load and bimetallic element, because of welding, do not produce unfavorable effect.

Claims

1. for bow type part/bimetal piece connector of temperature controller (2), comprising:

Be connected to the fixing bimetallic element (20) with bow type part (21), wherein said bimetallic element (20) acts in the reed group (24) of trigger switch element (26) by the second pin (25), described bow type part (21) carries by the first pin (23) and acts on the functional element (22) in described reed group (24), linkage interface at described bimetallic element (20) and described bow type part (21), described bimetallic element (20) is only fastenedly connected to described bow type part (21) in the outside of its crooked position (203), thereby after described bimetallic element (20) is connected with described bow type part (21), described bimetallic element (20) there will not be the variation of xsect at its connecting portion place.

2. bow type part/bimetal piece connector according to claim 1, is characterized in that, described bimetallic element (20) comprises the thermometal in the copper middle layer having between active layers and passive layer.

3. bow type part/bimetal piece connector according to claim 2, is characterized in that, the thickness in described copper middle layer is about 10%～60% of described bimetallic element (20) gross thickness.

4. according to the bow type part/bimetal piece connector described in any one in claims 1 to 3, it is characterized in that, described fixing with bow type part (21) and described bimetallic element (20), be to weld together on their linkage interface.

5. bow type part/bimetal piece connector according to claim 4, it is characterized in that, the described fixing linkage interface with bow type part (21) and described bimetallic element (20) comprises for making temperature switch (2) be fixed to the fixed orifice (202) of application apparatus, in the position of departing from the crooked position (203) of described bimetallic element (20), be provided with at least one for connecting described bimetallic element (20) and the described fixing solder joint (201) with bow type part (21), wherein said fixed orifice (202) is arranged between described crooked position (203) and described solder joint (201).

6. according to the bow type part/bimetal piece connector described in any one in claims 1 to 3, it is characterized in that, described bimetallic element (20) comprises passive metal covering, and this passive metal covering is face of weld.

7. bow type part/bimetal piece connector according to claim 4, is characterized in that, described bimetallic element (20) comprises passive metal covering and active metal covering, and the material thickness of passive is equal to or greater than the material thickness of active surface.

8. bow type part/bimetal piece connector according to claim 4, is characterized in that, described bow type part (21) is welded to one another into they are offset between 0～0.1mm on its linkage interface with described bimetallic element (20).

9. bow type part/bimetal piece connector according to claim 4, it is characterized in that, described bow type part (21) is welded to one another into and makes described bow type part (21) and described bimetallic element (20) accurately and there is no Di top of each other, space Shang Jie circle with described bimetallic element (20).

10. bow type part/bimetal piece connector according to claim 4, is characterized in that, described bow type part (21) and described bimetallic element (20) are interconnective by laser bonding or resistance welded.

11. bow type part/bimetal piece connectors according to claim 4, it is characterized in that, described welding is that the mode with spot welding is connected described bimetallic element (20) in the outside at the maximum stress in bend position of described bimetallic element (20) with described bow type part (21).

12. bow type part/bimetal piece connectors according to claim 4, it is characterized in that, described welding is that the outside of stitching the maximum stress in bend position of the bimetallic element (20) of the mode of weldering between described bimetallic element (20) and described bow type part (21) is connected described bimetallic element (20) with bow type part (21).

13. 1 kinds of acquisitions have the method for the bow type part/bimetallic element connector for temperature controller (2) of feature described in claim 1, it is characterized in that, described bow type part (21) and described bimetallic element (20) weld together at least one position in the outside of the crooked position (203) of described bimetallic element.

14. methods according to claim 13, is characterized in that, described method is for obtaining according to the bow type part/bimetal piece connector described in claim 2 to 13 any one.