CN203398072U - Fuse support and fuse assembly used for disconnector - Google Patents

Abstract

The utility model provides a fuse support (10). The fuse support (10) comprises a first retaining sheet (2) made of an integral type plate-shaped conductor, and the first retaining sheet (2) is fixedly installed and is configured to contact with a moving contact directly or be connected with a wire. The fuse support (10) also comprises a second retaining sheet (3) made of an integral type plate-shaped conductor, and the second retaining sheet (3) is fixedly connected with the first retaining sheet (2). The first retaining sheet (2) and the second retaining sheet (3) are respectively provided with a free end, and the free ends are arranged in an opposite manner to form a groove (6) used for electrically contacting with and accommodating connecting terminals (13, 13') of a fuse. The fuse support (10) also comprises compaction springs used for pressing the first retaining sheet (2) and the second retaining sheet (3) on the connecting terminals (13, 13') of the fuse. The utility model also provides a fuse assembly (100).

Description

Fuse support and for the fuse assembly of isolating switch

Technical field

The utility model relates to appliance switch field, the fuse assembly that relates in particular to a kind of fuse support and have this fuse support.

Background technology

In various high and low voltage electric distribution systems and control system and power consumption equipment, as in isolating switch, conventionally provide fuse, with the electric current of flowing through, surpass setting after a period of time in this appliance switch, the heat producing with itself makes melt fusing wherein, disconnects the circuit of appliance switch.That is, fuse is as the protector of short circuit and overcurrent.

For fuse is effectively installed, conventionally provide fuse support to support this fuse.Fig. 1 shows a kind of known fuse support 10 ', it comprise that the fixed connecting piece 1 ' made by conductor material and pair of conductors material make for clamping the keeper 2 ', 3 ' of fuse link.The L-shaped bending shape of this fixed connecting piece 1 ', and be fixedly installed on the standing part of isolating switch for example.This is to keeper 2 ', 3 ' also L-shaped bending-like, and keeper 2 ', 3 ' L shaped dogleg section are fixedly connected with the L shaped dogleg section of fixed connecting piece 1 ' by screw threads for fastening structure 5 '.In addition, this fuse support 10 ' also comprises for keeper being applied to the holddown spring 4 ' of elastic force close to each other, thereby the link of fuse 11 13,13 ' (as shown in Figure 2) can be received and be clamped between keeper 2 ', 3 '.Fig. 2 shows a kind of embodiment of fuse 11, it is high breaking (NH) fuse, comprise square main body 12 and from main body both sides extended a pair of link 13,13 ', the interior meeting of this main body 12 is provided with predetermined fusing position conventionally, for example, have relatively high-resistance narrow portion position.As previously mentioned, this is clamped in respectively between the keeper of a pair of fuse support link.When appliance switch is worked, moving contact or wiring meeting are connected with the fixed connecting piece 1 ' of a fuse support 10 ', thereby electric current is passed to a link 13 and is arrived another link through main body 12 by keeper 2 ', 3 ', then flow in connected another moving contact or wiring by the parts in another fuse support (not shown).Ideally, when the electric current of the fuse of flowing through surpasses rated current a period of time, the predetermined fusing position of this fuse is fused because of heating, thereby has realized short circuit and overcurrent protection effect.

But the relevant issues that existing fuse and support thereof exist are, electric current is when flowing through support, to be always that screw threads for fastening structure flows through from the connecting portion of fixed connecting piece and keeper, resistance is herein very large, and extended current flow path, thereby may cause except aforementioned predetermined fusing position, at fuse other non-fusing position, especially fuse link positions, for example terminal part 14 produces too high temperature, and this overheated temperature is undesirable.Because fuse probably can, because fusing appears in this too high temperature when not reaching scheduled current or scheduled duration, cause fuse to lose efficacy.And the high temperature occurring at these non-fusing positions has also affected the working life of fuse.

Therefore, people wish further to reduce the resistance of fuse support, to reducing the non-fusing position of fuse and the heating of fuse support.

Summary of the invention

The utility model aims to provide a kind of fuse support of heating of non-fusing position of the fuse that can effectively reduce fuse support or be mounted thereon.

For achieving the above object, the utility model proposes a kind of fuse support, comprising: the first retention tab of being made by the tabular conductor of integral type, its fixed installation and be configured to directly contact moving contact or wiring; The second retention tab of being made by the tabular conductor of integral type, it is fixedly connected with described the first retention tab, and described the first retention tab and the second retention tab respectively have opposed free end to be formed for receiving and electrically contacting the groove of fuse link; For described the first retention tab and the second retention tab being pressed against to the holddown spring of the link of described fuse.

By setting like this of the present utility model, electric current from moving contact or wiring will can not pass through other connecting portion, but flow in the first retention tab along shortest path, flow directly into fuse link, reduced significantly thus the heating of fuse support and fuse link.

Owing to having saved the be fixedly connected with portion of existing required keeper with fixed connecting piece, and only need two keepers to be fixedly connected with, thereby that they can be avoided is existing, in the L shaped bending of connecting portion, this has further shortened current path, contributes to reduce heating.

And, because the first retention tab plays the effect of fixed connecting piece and keeper simultaneously, can do relatively thickly, this not only can improve support effects, and has the resistance of further reduction.Correspondingly, because the second retention tab does not work the current-carrying effect of taking substantially, it can do more frivolously.

According to preferred embodiment, described the first retention tab can have the thickness that is greater than described the second retention tab.

According to a preferred embodiment, described the first retention tab can have first paragraph and second segment, and wherein, the first retention tab is in the installation that is fixed of described first paragraph, described second segment at described groove position towards being offset to described first paragraph away from the second retention tab direction.Described groove is arranged to be contained in the median plane perpendicular to its thickness direction of the fuse link in this groove and the median plane perpendicular to its thickness direction of described first paragraph aligns.

By making fuse, being particularly favourable as the median plane of the link of high breaking (NH) fuse aligns with the first paragraph that is used as the first retention tab of fixed connecting piece, because this is not only very beneficial for the installation of fuse, and make fuse link and the first retention tab contact-making surface contact very even, thereby greatly improved current delivery efficiency, further reduced the heating at fuse link position.And by the fuse support of a pair of configuration like this, the electric current that can make to flow through fuse is even, the fuse blows effect that is conducive to realize ideal.

According to a specific embodiment, described the second retention tab can have straight first paragraph, and described the first and second retention tabs are fixed to one another connection at its first paragraph, and this is convenient to the processing of the second retention tab.

According to another specific embodiment, described the second retention tab can have the first paragraph extension first paragraph that favours described the first retention tab; Described the first retention tab also has the middle linkage section that first paragraph with this second retention tab is parallel and be fixedly connected with, and this is a kind of selection structure according to fuse link thickness.

More preferably, described the second retention tab also has at described groove position towards be offset to the second segment of the first paragraph of described the second retention tab away from described the first retention tab direction; Wherein, the bias levels of the second segment of described the first retention tab is greater than the bias levels of the second segment of described the second retention tab.When this thickness that is particularly useful for fuse link is greater than the thickness of the first retention tab, guaranteed that fuse can mainly be supported by the first thicker retention tab.

According to a preferred embodiment, the kink that the free end of described the first and second retention tabs respectively has upward and extends towards direction away from each other, so that the insertion of fuse link.

According to a preferred embodiment of the present utility model, described holddown spring comprise at least one, the preferred ring spring with opening of pair of parallel, it has a pair of free end in fuse link one side that deviates from of butt the first and second retention tabs respectively, and described the first and second retention tabs are also formed with the aperture of passing for described ring spring.By this structure, can provide good clamping effect to retention tab.

According to a concrete preferred embodiment of the present utility model, described fuse support is specially adapted to high breaking (NH) fuse.

According to another program of the present utility model, a kind of fuse assembly for isolating switch is provided, comprise a fuse and a pair of described fuse support, fuse has body and the extended a pair of link from body both sides respectively, this is inserted to respectively this in the groove of one of fuse support to link, and this is reversed arrangement for fuse support with regard to the relative position of the first retention tab and the second retention tab.Thus, can provide fuse support point-device groove alignment, installation and the electric current of being convenient to fuse evenly transmit.

A part for other features and advantages of the utility model will be that those skilled in the art are obvious after reading the application, and another part will be described by reference to the accompanying drawings in embodiment below.

Accompanying drawing explanation

The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein,

Fig. 1 shows existing a kind of fuse support;

Fig. 2 shows the embodiment of NH fuse;

Fig. 3 shows according to the assembling stereogram of fuse support of the present utility model embodiment;

Fig. 4 shows the exploded view of fuse support embodiment as shown in Figure 3;

Fig. 5 shows the first retention tab of fuse support embodiment as shown in Figure 3;

Fig. 6 shows the second retainer of the fuse support embodiment shown in Fig. 3;

Fig. 7 shows according to the assembling stereogram of another embodiment of fuse support of the present utility model;

Fig. 8 shows the embodiment according to fuse assembly of the present utility model.

In the accompanying drawings, same or analogous Reference numeral represents same or analogous feature.

Embodiment

For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing embodiment of the present utility model is described.Although it is in order to present execution modes more of the present utility model that accompanying drawing is provided, accompanying drawing needn't be drawn by the size of specific embodiments, and some feature can be exaggerated, remove or disclosure of the present utility model is cutd open to illustrate better and explain by office.The phrase occurring in specification " in the accompanying drawings " or similar term needn't be with reference to institute's drawings attached or examples.

In explanation, be used to describe some directional terminology of accompanying drawing, for example " on ", D score, " left side ", " right side ", " making progress ", " downwards " and other directional terminology, by being understood to, have its normal implication and related those directions while often seeing respective drawings of making a comment or criticism, this should not be construed as the concrete restriction to the technical scheme of claims.

Term " about " in the utility model or " substantially " will be understood by those of ordinary skills and will change within the specific limits according to the context of using this term, for example, and in 5% the scope up and down of relevant concrete numerical value.

Refer now to Fig. 3, shown the fuse support 10 according to the first preferred embodiment of the present utility model.The fuse support 10 of shown embodiment is for example the support for high breaking (NH) fuse, but it may occur to persons skilled in the art that under instruction of the present utility model, use invention thought of the present utility model to be transform as the support that uses other fuse, this all falls into scope of the present utility model.

As shown in the figure, this fuse support 10 mainly comprises the first retention tab 2 opposite each other and the second retention tab 3, for this first and second retention tab 2,3 being fixed to one another to the screw threads for fastening structure 5 of connection, and for apply the holddown spring 4 of elastic force toward each other towards this first and second retention tab 2,3.In an illustrated embodiment, the first and second retention tabs 2,3 are made by the tabular conductor material of integral type, as red copper (industrial pure copper), for example, by cold forming.

According to embodiment of the present utility model, this first keeper can play the effect of a part that connects (touching) head and fuse link supporting structure with fixing simultaneously.Shown in Fig. 4 and Fig. 5, this first retention tab 2 can comprise straight first paragraph 21, the second segment 22 of setovering with respect to first paragraph 21 towards the direction away from the second retention tab 3 and the changeover portion 28 that connects this first paragraph and second segment.

In the straight first paragraph 21 of this first retention tab 2, be formed with for this first retention tab 2 being fixedly mounted on to electric component, as the installing hole 23 of the standing part of isolating switch and the installing hole 25 for this first retention tab 2 is fixedly connected with the second retention tab 3.Although do not specifically illustrate, the first paragraph 21 of this first retention tab 2 optionally contacts with moving contact or is electrically connected to wiring.

With reference to figure 6, the second retention tabs 2, be illustrated, and it can have straight first paragraph 31.In this first paragraph 31, be formed with equally the installing hole 35 being fixedly connected with 3 for the first and second retention tabs 2.Under assembled state, installing hole 25 and 35 is aligned with each other, and screw threads for fastening structure 5 is through this installing hole 25 and 35 and tighten that the first and second retention tabs 2 and 3 are tightened together.As shown in Figure 4, the embodiment of screw threads for fastening structure 5 can comprise through the screw 51 of this installing hole 25 and 35 and be threadedly engaged with the nut 52 of this screw and at least one pad that can have (being in an illustrated embodiment two 53,54).

Continuation is with reference to figure 3, under the assembled state of fuse support 10, the straight first paragraph 31 of the second segment 22 of the biasing of above-mentioned the first retention tab 2 and the second retention tab 3 is formed with not fastened free end and jointly limits a groove 6, its link 13 or 13 for receiving (clamping) and being electrically connected to fuse 11 ' (Fig. 2).That is, the first and second retention tabs 2 and 3 limit respectively fuse contact-making surface in groove 6.Be with the holddown spring 4 of the ring spring form of opening 41 and be biased in respectively on the dorsal part one side of groove (that is, away from) of this first and second retention tab 2 and 3.As shown in Figure 4, at the first retention tab 2(interlude 28) and the second retention tab 3(first paragraph 31) in be formed with respectively a pair of through hole 24 and 34, the ring spring 4 that pair of parallel is arranged is respectively through these two pairs of through holes 24 and 34, and it is not shown with its free end 42, to be connected to the depressed part of depressed part 26(the second retention tab forming on the first and second retention tabs 2 and 3 dorsal parts) in.

By above setting, the electric current that flows into the first retention tab 2 from wiring or moving contact will directly flow into fuse link 13 or 13 through first paragraph 21, presumable changeover portion 28 and second segment 22 and from its fuse contact-making surface '.Although have screw threads for fastening structure 5 between the first and second keepers 2 and 3, because electric current often tends to make almost not have electric current to flow through this connecting portion along the mobile characteristic of shortest path, it is overheated therefore can not produce at this connecting portion.And because the first lower retention tab 2 of this structure can be done to obtain relatively straight (bending degree is less), current path further shortens, thereby further reduces and generate heat.

According to particularly preferred embodiment of the present utility model, the cutting plane of the general thickness of be contained in the fuse link 13 or 13 in this groove 6 ' median plane perpendicular to its thickness direction of (groove 6 in other words) aligns with the median plane perpendicular to its thickness direction of the first paragraph 21 of described the first retention tab 2, the orientation of this median plane is according to measured link 13 or 13 on thickness direction, screw 51 bearing of trends as shown in Figure 4 ' (groove 6) and first paragraph 21 is weighed.It will be appreciated by one of skill in the art that this alignment comprises basic alignment, especially being equal on engineering significance.By such aligning, arrange, be not only very beneficial for aligning and the installation of fuse, and significantly improved the first retention tab 2 and fuse link 13 or 13 ' even contact, thereby further reduced heating.

Continuation with reference to figure 4, the first and second retention tabs in upper end, be the kink 27 and 37 that can respectively have upward on free end and extend towards direction away from each other, to facilitate fuse link 13 or 13 ' insertion.

With reference to figure 7 and Fig. 8, show another embodiment according to fuse support 10 of the present utility model.The difference of this embodiment and previous embodiment is mainly, the second retention tab 3 is not mainly straight, but comprises that the first paragraph 21 that favours described the first retention tab 2 extends first paragraphs 31, is offset to second segment 32 and the changeover portion 38 between this first paragraph 31 and second segment 32 of the first paragraph 3 of this second retention tab 3.For this reason, in the first paragraph 21 of the first retention tab 2 and the intermediate location of second segment 22, formed the middle linkage section 29 that first paragraph 31 with this second retention tab 3 is parallel and be engaged with each other, at this, the first and second retention tabs 2 and 3 are fixed to one another connection by foregoing screw threads for fastening structure 5.The second segment 32 of the second retention tab 3 of the second segment 22 of the first retention tab 2 of biasing and biasing limits for holding fuse link 13 or 13 in free end side jointly ' groove 6.In this embodiment, the bias levels of the second segment 22 of the first retention tab 2 is preferably greater than the second segment 32 of the second retention tab 3.

Be similar to aforementioned the first embodiment, this embodiment also preferably can be arranged so that fuse link 13 or 13 ' median plane of (groove 6) aligns substantially with the median plane of the first paragraph 21 of the first retention tab 2.

In a second embodiment, for the through hole 24 of holddown spring 4, be positioned at the second segment of the first retention tab 2, but can expect that this through hole is positioned at other positions, as the middle linkage section 29 corresponding to the first embodiment.

Under instruction of the present utility model, people can expect by shown in preferred embodiment in conjunction with obtaining new embodiment, for example in one embodiment, the second retention tab 3 has as in the first embodiment shown straight first paragraph and is fixedly connected with the straight first paragraph of the first retention tab 2 at this, and as shown in the second embodiment, has the second segment 32 of the first paragraph 31 that is offset to the second retention tab 3 simultaneously and jointly limit groove 6 with the second segment 22 of the biasing of the first retention tab 2.This all falls into scope of the present utility model.

Specifically with reference to figure 8, the utility model also relates to a kind of fuse assembly 100, comprise a fuse and a pair of fuse support of the second embodiment as shown in Figure 7, described fuse has body and the extended a pair of link from body both sides respectively, this is inserted to respectively this in the groove of one of fuse support to link, and this is reversed arrangement for fuse support with regard to the relative position of the first retention tab and the second retention tab.People say clear, can be with falling into the fuse support of the utility model scope, fuse support that for example fuse support of the first embodiment substitutes the fuse assembly 100 illustrate obtains new fuse assembly, and this all falls into scope of the present utility model.

Be to be understood that, although this specification is described according to each embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, technical scheme in each embodiment also can, through appropriately combined, form other execution modes that it will be appreciated by those skilled in the art that.

The foregoing is only the schematic embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations, modification and the combination of doing under the prerequisite of design of the present utility model and principle, all should belong to the scope of the utility model protection.

Reference numerals list

1 '-fixed connecting piece

2-the first retention tab

2 '-keeper

3-the second retention tab

3 '-keeper

4-holddown spring

4 '-holddown spring

5-screw threads for fastening structure

5 '-screw threads for fastening structure

6-groove

10-fuse support

10 '-fuse support

11-fuse

12-fuse

13-fuse link

13 '-fuse link

14-terminal part

21-first paragraph

22-second segment

23-installing hole

24-through hole

25-installing hole

26-depressed part

27-kink

28-changeover portion

Linkage section in the middle of 29-

31-first paragraph

32-second segment

33-grooving

34-through hole

35-installing hole

37-kink

38-changeover portion

41-opening

42-free end

51-screw

52-nut

53-pad

54-pad

100-fuse assembly

The A-sense of current

Claims (10)

1. a fuse support, is characterized in that, comprising:

The first retention tab (2) of being made by the tabular conductor of integral type, it is fixed and installs and be configured to directly contact moving contact or wiring;

The second retention tab (3) of being made by the tabular conductor of integral type, it is fixedly connected with described the first retention tab (2), described the first retention tab (2) and the second retention tab (3) respectively have opposed free end to be formed for receiving and electrically contacting the fuse link groove of (13,13 ') (6);

For described the first retention tab (2) and the second retention tab (3) being pressed against to the holddown spring of the link (13,13 ') of described fuse.

2. fuse support according to claim 1, is characterized in that, described the first retention tab (2) has the thickness that is greater than described the second retention tab (3).

3. fuse support according to claim 1 and 2, is characterized in that,

Described the first retention tab (2) has first paragraph (21) and second segment (22), wherein, the first retention tab (2) is in described first paragraph (21) installation that is fixed, described second segment (22) at described groove (6) position towards being offset to described first paragraph (21) away from the second retention tab direction

Wherein, the median plane perpendicular to its thickness direction that described groove (6) is arranged to be contained in the fuse link (13,13 ') in this groove (6) aligns with the median plane perpendicular to its thickness direction of described first paragraph (21).

4. fuse support according to claim 3, is characterized in that,

Described the second retention tab (3) has straight first paragraph (31), and wherein, described the first and second retention tabs (2,3) are fixed to one another connection at its first paragraph (21,31).

5. fuse support according to claim 3, is characterized in that,

Described the second retention tab (3) has first paragraph (21) the extension first paragraph (31) that favours described the first retention tab (2);

Described the first retention tab (2) also has the middle linkage section (29) that first paragraph (31) with this second retention tab (3) is parallel and be fixedly connected with.

6. according to the fuse support described in claim 4 or 5, it is characterized in that,

Described the second retention tab (3) also has at described groove (6) position towards be offset to the second segment (32) of the first paragraph (31) of described the second retention tab (3) away from described the first retention tab (2) direction;

Wherein, the bias levels of the second segment (22) of described the first retention tab (2) is greater than the bias levels of the second segment (32) of described the second retention tab (3).

7. fuse support according to claim 1 and 2, is characterized in that, the kink (27,37) that the free end of described the first and second retention tabs (2,3) respectively has upward and extends towards direction away from each other.

8. fuse support according to claim 1 and 2, it is characterized in that, described holddown spring (4) comprises the ring spring of at least one band opening (41), it has butt the first and second retention tabs (2 respectively, 3) deviate from a pair of free end (42) in fuse link one side, described the first and second retention tabs (2,3) are also formed with the aperture (24,34) of passing for described ring spring.

9. fuse support according to claim 1 and 2, is characterized in that, described fuse support (10) is for high breaking fuse.

10. the fuse assembly for isolating switch, comprise a fuse (11) and a pair of according to the fuse support described in any one in claim 1 to 9 (10), described fuse (11) has body (12) and the extended a pair of link (13 from body both sides respectively, 13 '), this is to link (13,13 ') be inserted to respectively this in the groove of one of fuse support (6), this is reversed arrangement for fuse support (10) with regard to the relative position of the first retention tab (2) and the second retention tab (3).

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