CN101253592B

CN101253592B - Thermal link and method for producing said link

Info

Publication number: CN101253592B
Application number: CN2006800314040A
Authority: CN
Inventors: 彼得·西爱博; 罗兰·沃尔夫; 路慈·帕赫克
Original assignee: INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Current assignee: INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Priority date: 2005-06-28
Filing date: 2006-06-27
Publication date: 2011-01-12
Anticipated expiration: 2026-06-27
Also published as: CN101253592A; DE202005010133U1

Abstract

The invention relates to a thermal link (1) for electrical appliances, comprising an insulating part (10) with electrical terminals (11) and contact springs (12) for providing electrical contact between said terminals (11), a fusible material insert (15) that acts as the thermal trip element and a transmission pin (13), which is displaceably mounted in the insulating part (10), one end of which engaging with the fusible material insert (15) and the other end with the contact springs (12). Said link is characterised in that the fusible material insert (15) is situated in a casing (141) that is configured as one piece with the heat transfer plate (14).; The invention also relates to a method for producing a thermal link (1) comprising the following steps: the casing (141) for housing the fusible material insert (15) and the casings (144) that connect the heat transfer plate (14) to the insulating part (10) are drawn from the heat transfer plate (14); the fusible material insert (15) is inserted into the casing (141) and formed; the insulating part (10) is placed on the heat transfer plate (14) and connected in a positive fit to the graduated inner sections (107) of the inner cavities (108) by means of the casings (144).

Description

Thermal cut-off and manufacture method thereof

The present invention relates to be used for the thermal cut-off of electric equipment, it comprises the transmission pin of insulation division, heat transfer plate, fusible material insert, insulating material and biased contact spring.Described insulation division has electric terminal and produces the contact spring of current path; Described fusible material insert is as thermal trip; Described transmission pin replacedly is installed in the described insulation division, and an end of described transmission pin and described fusible material insert connect, and the other end connects mutually with described contact spring.Biased contact spring is pushed described pin downwards after described fusible material fusing, thereby separates the contact of contact spring.The invention still further relates to the method for a kind of like this thermal cut-off of manufacturing.

Thermal cut-off is known for everybody in the prior art, and for example from document DE 2826205A1, wherein fusible material places in the room, and the top and the bottom of described room are opening, is arranged on the heat transfer plate, and is located in insulation division recessed.Yet this thermal cut-off has much independently part, comprises heat transfer plate, room, fusible material, has corresponding recessed insulation division and transmission pin, and the assembling of these a plurality of individual part need spend huge energy.And, but when various molten solder contacted with oxygen, oxidation may cause the change of their fusing points.

Therefore, the object of the present invention is to provide a kind of thermal cut-off, it has overcome the defective of prior art, and can produce with low cost, and assembling only expends minimum energy, the present invention also aims to provide a kind of reliable method manufacturing to be suitable for the thermal cut-off of large-scale production.

Purpose of the present invention is achieved by the technical characterictic in the claim 1.Discussed in the feature of favourable embodiment in Rights attached thereto item and/or following description, in the accompanying drawings:

Fig. 1 a shows the end view according to the signal of the thermal cut-off of a specific embodiment of the present invention;

Fig. 1 b has shown the thermal cut-off of Fig. 1 a that sees from the top;

Thermal cut-off among Fig. 1 c displayed map 1a and Fig. 1 b is along the schematic sectional view of the A-A line shown in Fig. 1 b;

Fig. 1 d has shown the schematic plan view of local detail of the heat transfer plate of the thermal cut-off among Fig. 1 a and Fig. 1 b;

Fig. 2 has shown that the three-dimensional exploded view according to the thermal cut-off of further embodiment of the present invention shows;

But the heat transfer plate of the insert of the molten solder in Fig. 3 a, 3b and the 3c displayed map 2 with thermal cut-off;

But the insulation division of the thermal cut-off in Fig. 4 a and the 4b displayed map 2 and the heat transfer plate that has molten solder;

The heat transfer plate of mounted insulation division in Fig. 5 a and the 5b displayed map 2 and transmission pin with thermal cut-off;

The first terminal that has contact spring that adapts to thermal cut-off shown in Fig. 6 a and the 6b displayed map 2;

Fig. 7 a and 7b show second terminal that adapts to thermal cut-off as shown in Figure 2;

The stereogram of the thermal cut-off that has assembled in Fig. 8 a displayed map 2 is represented, the sectional view of the penetration heat fuse among Fig. 8 b displayed map 8a;

Fig. 9 has shown the stereogram according to the common thermal transmission plate of the Fig. 1 of being used for thermal cut-off of the present invention and temperature controller;

Figure 10 shows that thermal cut-off and temperature controller are installed in the plan view on the heat transfer plate shown in Figure 9;

The modification of the specific embodiment of the insulation division in Figure 11 displayed map 2.

Sell particularly including insulation division, fusible material insert and transmission according to the thermal cut-off for electric equipment of the present invention. Described insulation division has electric terminal and the contact spring that is electrically connected between the terminal is provided; Described fusible material insert is as thermal trip; Described transmission pin replacedly is installed in the described insulation division, and an end and the described fusible material insert of this transmission pin connect, and the other end connects mutually with described contact spring. Described fusible material insert is arranged in the room, and described room and heat transfer plate are integrally formed. So that the assembling of the very low cost of thermal cut-off and production become possibility, compared with prior art, the independently part of the final assembling of thermal cut-off to be used to significantly reduces according to room of the present invention and the integrally formed form of transmission plate. Particularly, in the manufacture process of heat transfer plate, described room can draw out from described heat transfer plate, and therefore fusible material can be pressed in the Manufactured room, this has guaranteed that fusible material and heat transfer plate have extremely effectively thermo-contact, and fusible material only exposes in upward direction.

Adaptive being formed on around the described room is ring-shaped depression in heat transfer plate, and it similarly can be the one-stop operation that draws room from heat transfer plate and be provided. Should be beneficial to especially around the ring-shaped depression of described room and hold the fusible material that from described room, melts, guarantee like this when thermal cut-off is activated, do not have fusible material to overflow to the outside, or even touch contact spring and damage the function of thermal cut-off or damage electrical equipment.

A specific embodiment of the present invention provides according to thermal cut-off of the present invention, this thermal cut-off aptly, comprise the insulation division with two batter portions, described two batter portions contact with heat transfer plate, and the bottom of described insulation division and described heat transfer plate are separated by a distance.Pin is arranged in the through hole of described insulation division aptly, and the bottom of described insulation division is formed with circular recess, and described through hole is arranged in the described circular recess.Distance from the heat transfer plate to the bottom, and the circular recess on the bottom of the insulation division in the through hole near zone forms in this mode corresponding to room makes the upper limb of room roughly corresponding to the recess of insulation division bottom.This additionally provides the space for the fusible material that has melted.

The inside diameter of described room is aptly roughly corresponding to the diameter of transmission pin, and fusible material is transmitted the pin major part by room and heat transfer plate and top and surrounds like this, and protected avoiding and the contacting of oxygen, so avoids not oxidated.

Further advantageous embodiments of the present invention provides according to thermal cut-off of the present invention, and this thermal cut-off can also further comprise having another recessed insulation division at least aptly, this another recessedly have an inner shoulder.Described recessed corresponding to the case that draws from substrate, the upper limb of described case connects around the described inner shoulder, so that heat transfer plate firmly is connected to described insulation division.Herein, heat transfer plate and insulating frame particularly advantageously form, but so that described insulating frame and molten solder can be adaptive from top and heat transfer plate, and similarly, transmission sell and terminal can be from the top adaptive insulating frame.

Heat transfer plate according to thermal cut-off of the present invention can also be advantageously, integrally formed and/or integrally formed with the substrate and/or the heat transfer plate of another thermal cut-off at least with temperature switch, this further makes assembling (being included in the assembling of electrical equipment) simplify and has a cost advantage, and have for treating that monitored temperature provides the advantageous effects of sense position, wherein this temperature is identical with described thermal cut-off and temperature switch.

A kind of method according to manufacturing thermal cut-off of the present invention, this method is particularly including draw room and another case at least from heat transfer plate, described room is used to hold the fusible material insert, described another case at least is used for heat transfer plate is connected to insulation division, and the heat transfer plate that part can be installed from the top so just is provided.The corresponding insulation division of heat transfer plate has adaptive recessedly in described insulation division, and this is recessed corresponding to the described room that holds the fusible material insert with heat transfer plate is connected to the described case of insulation division.Described fusible material insert inserts in order in the room that holds it, and afterwards, insulation division places on the heat transfer plate, and by with the form fit of described case, and be connected with heat transfer plate.Afterwards, the transmission pin inserts in the insulating frame from the top, and similarly, suitable terminal comes and the adaptive installation of insulating frame from the top.Method according to manufacturing thermal cut-off of the present invention, because heat transfer plate and insulation division form in particularly advantageous mode, make heat transfer plate and insulation division only can provide part from the top, so this method only comprise several simple production stages, therefore in particular, cheap completely.

According to the method for manufacturing thermal cut-off of the present invention also particularly including press-fiting to heat transfer plate, to make the first suitable room and at least one second case within it, this first room is in order to hold the fusible material of clear and definite capacity, and this second case forms the cup-shaped neck ring.Afterwards, the fusible material insert is inserted adaptedly and is pressed in described first room with spherical form.Afterwards, insulation division is connected to heat transfer plate by form fit, this is because described second case and the further case that forms the cup-shaped neck ring aptly on heat transfer plate, insert the described portion of becoming attached to, and utilize proper tools (advantageously from the top, instrument is a ball formula pressing machine) it is broadened, like this case be located in insulation division suitable undercut portions (108) on every side.Afterwards, the single part dielectric pin of predetermined length is inserted insulation division aptly, so that dielectric pin places on the fusible material insert of heat transfer plate.

Afterwards, adaptive electric terminal accurately, at first is the terminal with switch spring (switchingspring), then is the terminal with fixed contact, is bonded in the insulation division in impermanent fixedly connected mode.This connection is carried out aptly and advantageously by leg, and described leg and described terminal are angle deviating, and suitable and advantageously have a V-arrangement folder in its end.Leg is inserted insulation division in mode similarly from the top, and utilize proper tools, scheduled power broadens from a relative side by this way, make described clip be positioned at around the insulation division undercut portions, this instrument that advantageously makes passes suitable otch in heat transfer plate from the below become possibility.

Below describe the present invention based on schematic diagram.

Fig. 1 a has shown the schematic end view according to thermal cut-off 1 of the present invention, it comprises electric terminal 11 and insulation division 10, insulation division 10 and its batter portion 104 that has all are arranged on the heat transfer plate 14, and heat transfer plate 14 is integrally formed with room 141, and room 141 is used to hold fusible material 15.Fig. 1 b shows the vertical view of thermal cut-off 1.

Fig. 1 c has shown Fig. 1 a of the A-A line in Fig. 1 b and the schematic sectional view of the thermal cut-off 1 shown in Fig. 1 b.Shown thermal cut-off 1 comprises insulation division 10, electric terminal 11, contact spring 12, the hole 101 of running through insulation division 12, heat transfer plate 14 and transmission pin 13, wherein heat transfer plate has room 141 and the fusible material 15 that places in the room 141, described transmission pin 13 is located in the through hole 101, one end of this transmission pin 13 connects mutually with fusible material insert 15, and the other end connects mutually with contact spring 12.Be formed with side direction shoulder 105 aptly on the described insulation division 10, this side direction shoulder 105 is with corresponding from the extended fastening arm of described heat transfer plate 14 143, described fastening arm 143 is around their end connects described shoulder 105, and described like this insulation division just firmly is fixed on the described heat transfer plate 14.Insulation division 10 also has two batter portions 104, and described batter portion is erected on the heat transfer plate 14 the very little distance of being separated by between bottom 102 and the heat transfer plate 14.Recess 103 corresponding to room 141 is formed on the bottom 102 of insulation division 10 adaptedly, so that the upper limb of room 141 roughly is located in the recess 103.

Fig. 1 d has shown the schematic plane graph of the local detail of heat transfer plate 14, and this heat transfer plate 14 has room 141 and around ring-shaped depression 142 around it and the fusible material insert 15 of being located at room 141 inside.Bottom 102, foot 104, recess 103, depression 142 and room 141 form in the suitable mode of this kind, make when thermal cut-off starts, and assurance does not have hot melt material and touches contact spring or spill outside the thermal cut-off 1.

Fig. 2 has shown the three-dimensional exploded view according to the thermal cut-off of further embodiment of the present invention.This thermal cut-off comprises heat transfer plate 14, insulation division 10, fusible material insert 15, transmission pin 13 and electric terminal 11.Room 141 is located among the substrate 14, and to be used to hold fusible material insert 15, this room 141 is corresponding to the room in the first embodiment of the present invention described above 141.Be formed on another case 144 at least that also has within the heat transfer plate 14, these case 144 corresponding insulation divisions 10 be complementary recessed, below will describe in detail based on Fig. 5.

Fig. 3 a, 3b and 3c show the enlarged drawing of heat transfer plate 14, and this heat transfer plate 14 has room 141, and in order to hold fusible material insert 15, this fusible material insert 15 is located at adaptedly and is used for heat transfer plate is connected between two cases 144 of insulation division 10.Described fusible material insert 15 can be used as sphere or metal wire and inserts in the room 141 from the top, and is press-fited.

Afterwards, insulation division 10 places on the heat transfer plate 14 from the top, and wherein said insulation division 10 has its endoporus 101, and this endoporus 101 is corresponding to the fusible material insert 15 that is located in the room 141, described insulation division 10 is recessed 108 in also having, this recessed 108 corresponding depression 142.Insulation division 10 interior recessed 108 in be formed with suitable inside shoulder 107, heat transfer plate 14 and insulation division 10 link together effectively like this, be used to make case to abut against around the inner shoulder 107 because insert press mounting tools in recessed 108 from the top, its partial section at Fig. 4 b has carried out optimum demonstration.

Afterwards, from top patchhole 101, it is able to optimum the demonstration to the adaptive transmission pin 13 of suitable insulation materials for support in Fig. 5 a and Fig. 5 b with similar method.

Fig. 6 a shows the first suitable electric terminal 11 have contact spring 12 and suitable fastening leg 111, and this electric terminal 11 is inserted into insulation division 10 similarly from the top; Fig. 6 b is presented at the terminal 11 under the compressing of contact spring 12, fastening leg 111 is inserted the side recessed 109 of insulating frame and anchorage clip 112 from the top, described side recessed 109 forms at the lower end of leg 111, and described leg 111 abuts against around the shoulder that is formed on the side recessed 109.Clearly, terminal 11 can utilize the terminal that is suspended on the pre-punching on the lath and obtain aptly producing in enormous quantities.Leg 111 is crooked aptly, and contact spring 12 is fixed to terminal 11.Contact spring 12 is made by suitable electric conducting material, this electric conducting material has constant elasticity under up to about 300 ℃ temperature, aptly, contact spring is made by the rolled metal covering, silver-plated high-grade steel, and with the biasing mode install, can remedy insulation division 10 tolerance of (forming by pottery aptly) to the full extent like this.Heat transfer plate 14 also comprises fastening arm 143 aptly, and can also comprise suitable recess, to utilize proper tools from following crooked anchorage clip 112.

Fig. 7 a and 7b show second electric terminal 11, it forms in the mode that is similar to first electric terminal 11, and has fixed contact 16 aptly, and does not have contact spring, and similarly insert insulation division 10, and carry out form fit with insulation division 10 and be connected by being similar to first electric terminal 11 from the top.

Fig. 8 a shows the stereogram demonstration according to the thermal cut-off that has assembled 1 of the embodiment of Fig. 2, and Fig. 8 b shows the sectional view of the penetration heat fuse 1 among Fig. 8 a that has terminal 11, insertion section 10, heat transfer plate 14, transmission pin 13, fusible material insert 15, fastening case 144, contact spring 12 and fixing electric shock 16.

Fig. 9 shows the stereogram demonstration that is used for thermal cut-off 1 with the public substrate 14 of further thermal cut-off and/or temperature switch of Fig. 1 according to of the present invention, and especially, this temperature switch 2 has bimetallic element 20.

Figure 10 shows the thermal cut-off 1 be assemblied on the common thermal transmission plate 14 and the plane graph of temperature switch 2.Clearly, can also form in the mode that is similar to the heat transfer plate that is used for thermal cut-off 1 in the second embodiment of the present invention shown in Figure 2 according to common thermal transmission plate 14 of the present invention.

Figure 11 shows the modification according to the embodiment of Fig. 2, and the three-dimensional exploded view of the further specific embodiment of thermal cut-off provided by the invention 1 shows.The thermal cut-off 1 of this embodiment comprises heat transfer plate 14, insulation division 10, fusible material insert 15, transmission pin 13 and electric terminal 11.Specific embodiment in the specific embodiment corresponding diagram 2 among Figure 11, its difference are that insulation division 10 comprises side connecting plate 109 ", at connecting plate 109 " in be formed with respectively two continuous recessed 109 ', with the leg 111 that is used for fixing electric terminal 11.Specific embodiment shown in Figure 11 is especially favourable, because the leg of being located in recessed 109 ' 111 is fastened to connecting plate 109 by elbow folder 112 " downside.

Clearly, thermal cut-off 1 of the present invention can also comprise above-described technical characterictic according to the first and second embodiment combinations of the present invention illustrated in figures 1 and 2.

Label declaration

Thermal cut-off 1

Insulation division 10

Hole 101

Bottom 102

Recess 103

Foot 104

Side direction shoulder 105

Inner shoulder 107

Interior recessed 108

Side recessed 109,109 '

Electric terminal 11

Leg 111

Folder 112

Contact spring 12

Pin 13

Heat transfer plate 14

Room 141

Depression 142

Fastening arm 143

Case 144

Heat transfer plate 14

Room 141

Depression 142

Fastening arm 143

Case 144

Fusible material insert 15

Fixed contact 16

Temperature switch 2

Bimetallic element 20

Claims

1. thermal cut-off (1) that is used for electric equipment comprising:

Insulation division (10), described insulation division (10) have electric terminal (11) and the contact spring (12) of electrical connection are provided between described electric terminal (11);

Fusible material insert (15), described fusible material insert (15) is as thermal trip;

Transmission pin (13), described transmission pin (13) replacedly is installed in the described insulation division (10), and an end of described transmission pin (13) and described fusible material insert (15) connect, and the other end connects mutually with described contact spring (12);

It is characterized in that, in the room (141) that described fusible material insert (15) is located at and heat transfer plate (14) is integrally formed.

2. thermal cut-off as claimed in claim 1 (1) is characterized in that, the described room (141) in described heat transfer plate (14) is formed with ring-shaped depression (142) on every side.

3. thermal cut-off as claimed in claim 1 (1), it is characterized in that, described pin (13) is located in the through hole (101) of described insulation division (10), and the bottom (102) of described insulation division (10) is formed with circular recess (103), and described hole (101) are formed in the described circular recess (103).

4. thermal cut-off as claimed in claim 1 (1), it is characterized in that, the inside diameter of described room (141) is roughly corresponding to the diameter of described transmission pin (13), and described like this fusible material insert (15) is surrounded by described room (141), described transmission pin (13) and described heat transfer plate (14) most ofly.

5. thermal cut-off as claimed in claim 4 (1) is characterized in that, described fusible material (15) is pressed into described room (141).

6. the described thermal cut-off of claim 3 (1) as described above is characterized in that, described insulation division comprises and contacted two the batter portions of described heat transfer plate (14) (104) that described bottom (102) are separated by a distance with described heat transfer plate (14).

7. thermal cut-off as claimed in claim 6 (1), it is characterized in that, be formed with side direction shoulder (105) on the described insulation division (10), described side direction shoulder (105) is with corresponding from the extended fastening arm of described heat transfer plate (14) (143), described fastening arm (143) abuts against described side direction shoulder (105) on every side in their end, thereby described insulation division (10) firmly is arranged on the described heat transfer plate (14).

8. as any described thermal cut-off (1) in the claim 1 to 6, it is characterized in that, be formed with in the described insulation division (10) at least one with inner shoulder (107) recessed (108), described inner shoulder (107) is corresponding with the case (144) that draws out from described heat transfer plate (14), the upper limb of described case abuts against described inner shoulder (107) on every side, so that described heat transfer plate (14) firmly is connected to described insulation division (10).

9. thermal cut-off as claimed in claim 8 (1) is characterized in that, in described insulation division (10), form described at least one the quantity of recessed (108) be two, described room (141) is located between first and second cases (144).

10. the described thermal cut-off of claim 8 (1) as described above, it is characterized in that, described heat transfer plate (14) and described insulating frame (10) form by this way, be that described insulating frame (10) and described fusible material insert (15) can be installed on the described heat transfer plate (14) from the top, similarly, described transmission pin (13) and described electric terminal (11) can be installed on the described insulating frame (10) from the top.

11. the described thermal cut-off of claim 8 (1) is characterized in that as described above, described heat transfer plate (14) is integrally formed with the substrate and/or the heat transfer plate (14) of another thermal cut-off at least, and/or integrally formed with temperature switch (2).

12. the method for any described thermal cut-off (1) in manufacturing such as the claim 8 to 10 comprising:

Draw out from described heat transfer plate (14) and to be used to the described case (144) that holds the described room (141) of described fusible material insert (15) and be used for described heat transfer plate (14) is connected to described insulation division (10);

Insert described fusible material insert (15) in the described room (141) and it is pushed;

Described insulation division (10) is positioned on the described heat transfer plate (14), and the inside shoulder (107) of described interior recessed (108) of described insulation division (10) is by being connected with described case (144) with the form fit of described case (144).

13. method as claimed in claim 12, it is characterized in that: utilize press mounting tool, and pass through form fit, described case (144) is connected to the described inner shoulder (107) of described interior recessed (108), this press mounting tool is from top insertion described interior recessed (108), and this press mounting tool can allow the edge of described case (144) utilize form fit to connect around described inner shoulder (107).

14. as claim 12 or 13 described methods, comprising: the assembling between described heat transfer plate (14) and described fusible material insert (15), described insulation division (10), described transmission pin (13) and the described electric terminal (11) is carried out from the top.