CN216213237U

CN216213237U - Take fuse-element structure of mechanical fracture

Info

Publication number: CN216213237U
Application number: CN202122592386.8U
Authority: CN
Inventors: 王伟; 陈蓉蓉; 石晓光; 曹辉
Original assignee: Xian Zhongrong Electric Co Ltd
Current assignee: Xian Zhongrong Electric Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-04-05
Anticipated expiration: 2031-10-27

Abstract

The utility model provides a take fuse-element structure of mechanical fracture, includes the fuse-element, is connected with the link respectively at fuse-element both ends, its characterized in that is provided with a fuse-element between two link ends at least, the fuse-element includes at least one location portion both sides respectively the integrative mechanical disconnection portion that is connected with in location portion both sides respectively be provided with at least one narrow neck in location portion one side or the mechanical disconnection portion one side of both sides. The melt structure of the invention can be melted and mechanically cut off, and is suitable for the full current range.

Description

Take fuse-element structure of mechanical fracture

Technical Field

The invention relates to the field of electric power and new energy automobiles, in particular to a fuse body structure for a fuse for protecting a circuit. The melt structure may also be mechanically broken.

Background

The fuse as a protection device can protect the overload and short circuit of the circuit by depending on the heat effect of current; the melt used as the core device of the fuse is in direct proportion to the quadratic power of the current along with the increase of the fault current due to the self resistance, the heat productivity of the melt is increased rapidly, the melt is melted with the heat productivity to generate electric arc and is disconnected, and the purpose of disconnecting the fault current is achieved; generally, a small fault current is passed, and the blowing time is long, and the blowing time is shorter as the fault current is larger. In order to maintain the disconnection speed of the melt in the full current range and realize quick disconnection even at zero current, the melt structure is redesigned, so that the melt structure can be suitable for disconnection in the zero current and full current ranges, and the protection in the full current range is realized.

Disclosure of Invention

The invention aims to provide a melt structure, which can realize high-current fusing and zero-current or low-current mechanical disconnection, so that the melt structure is suitable for the full-current range, the melt disconnection time is shortened, and the disconnection capability is improved.

In order to achieve the purpose, the technical scheme provided by the invention is that the melt structure with the mechanical fracture comprises a melt, and connecting ends are respectively connected to two ends of the melt.

Preferably, the mechanical break conductive cross-sectional width is greater than the throat width.

Preferably, a plurality of melts are integrally connected in parallel between the two connecting ends.

Preferably, the mechanical breaking portion is a structure that reduces mechanical strength.

Preferably, the mechanical breaking part is one or any two combination of a narrow neck structure, a through hole structure and a notch structure which reduce the mechanical strength structure.

Preferably, the through-hole structure of the mechanical strength reducing structure is a crescent through-hole structure.

Preferably, the mechanical breaking parts on two sides of two adjacent positioning parts are respectively in a through hole structure, and the mechanical breaking parts of the two adjacent positioning parts are connected through a narrow neck structure.

Preferably, adjacent narrow necks are connected through a hollow through hole structure or a solid sheet structure.

Preferably, when the melt is a plurality of melts connected in parallel, at least two adjacent melts share the positioning part and the mechanical breaking part.

Preferably, when the number of the positioning portions is at least two, at least one positioning hole is arranged at the connection position of the mechanical disconnecting portion between two adjacent positioning portions.

Preferably, a fool-proof structure is provided at the melt or connecting end.

According to the melt structure, when a zero-current or small-current fault occurs, the mechanical breaking part on one side or two sides of the positioning part can be broken in a mechanical breaking mode to form a mechanical fracture, and a circuit is broken to realize circuit protection; when a large-current fault occurs, the width of the conductive section of the mechanical disconnecting part is slightly larger than that of the narrow neck part, so that the melt is fused at the narrow neck part, meanwhile, the mechanical disconnecting part is disconnected in a mechanical mode, a plurality of fusing and mechanical disconnecting fractures are formed on the melt, circuit protection is realized, the plurality of fusing fractures are realized, the arc extinguishing capacity can be improved, and the breaking capacity is improved.

Drawings

FIG. 1 is a schematic view of a first structure of a melt.

FIG. 2 is a schematic view of a second structure of the melt.

FIG. 3 is a schematic view of a third structure of the melt.

FIG. 4 is a schematic view of a fourth structure of the melt.

FIG. 5 is a schematic illustration of a fifth structure of a melt.

FIG. 6 is a sixth structural schematic of a melt.

FIG. 7 is a schematic illustration of a seventh structure of a melt.

FIG. 8 is a schematic illustration of an eighth structure of a melt.

Detailed Description

The above technical solutions are specifically described with reference to several embodiments shown in the drawings.

Example 1

The melt structure, see fig. 1, includes two connection ends 100, where the connection ends 100 are sheet-like structures and made of conductive materials. Four melts 200 are integrally connected in parallel between the connecting ends 100, and integrally connecting in parallel means that the melts are integrally connected with the connecting ends and are in parallel relation. The four melts are identical in structure, and one of the melts is illustrated in this example. The melt 200 is a strip sheet structure. The melt comprises a positioning part 201, and the positioning part 201 is of a solid structure and has the same width as the melt. When the fuse is used, the positioning portion needs to be supported or clamped and fixed by the fixing portion in the fuse housing, so that mechanical force can be conveniently applied. Mechanical breaks 202 are provided on both sides of the positioning portion 201. In this embodiment, the mechanical breaking portion is a hollow ring structure, and the current is shunted at the hollow ring structure and then converged through the positioning portion. A plurality of narrow necks 203 are arranged between the mechanical breaking part and the connecting end at intervals, a through hole structure 204 is arranged between two adjacent narrow necks, and the through holes in the through hole structure 204 can be rhombic holes, circular holes, elliptical holes or holes with other shapes. The throat 203 has a width less than the width of the ring structure. The sum of the widths of the two opposite sides of the through-hole structure through which the current shunts in the through-hole structure 204 is greater than the width of the throat, so as to ensure that the melt is fused at the throat when fused. The mechanical break has a conductive cross-section with a width greater than the width of the throat, also to ensure that the melt melts at the throat, rather than at the mechanical break, at high currents.

Working principle of example 1: when the fault current is generated and is small, the melt narrow neck is not fused enough, and the mechanical breaking part is broken in a mechanical mode to form mechanical breaking on the melt, so that current protection is realized; when fault current is the heavy current, fuse-element narrow neck department fuses, simultaneously, breaks off mechanical disconnection portion through mechanical system, forms a plurality of fusing fractures and mechanical fracture on the fuse-element, and the arc extinguishing ability and the breaking capacity under the improvement heavy current are put forward through the quick arc extinguishing of many fracture structures. The melt of the present embodiment is applicable to the full current range.

Example 2

On the basis of the embodiment 1, two parallel connection melts 200 are added, referring to fig. 2, a positioning part 201 and mechanical breaking parts 202 positioned at two sides of the positioning part 201 are added on the melt 200, and the mechanical breaking parts 202 between two adjacent positioning parts 201 are integrally connected through a narrow neck 205. The throat 205 has the same width as the throat 203. The melt structure of example 2 may form at least two mechanical discontinuities in the melt.

The working principle is the same as that of embodiment 1.

Example 3

In addition to embodiment 1, the structure of the mechanical breaking portion 202 is changed. Referring to fig. 3, in the present embodiment, the structure of the mechanical breaking portion is a notch structure 206, that is, the notch structure 206 is opened at the opposite position of the two sides of the melt at the two sides of the positioning portion, so as to reduce the mechanical strength of the melt at the opposite position, and the melt is more easily mechanically broken from the notch structure 206 to form a mechanical break under the action of the mechanical force.

The working principle is the same as that of embodiment 1.

Example 4

In addition to embodiment 1, the structure of the mechanical breaking portion 202 is changed. Referring to fig. 4, in the present embodiment, the mechanical breaking portion is formed as a single throat structure 207, that is, the single throat structure 207 is disposed on both sides of the positioning portion, and the single throat structure 207 is connected to the through-hole structure 204. The mechanical strength of the melt at the position is reduced by the single throat structure 207, and the melt is more easily mechanically disconnected from the position of the single throat structure 207 under the action of mechanical force to form a mechanical fracture. The width of the single throat structure 207 is greater than the width of the throat 203 to ensure that the melt is fused from the throat 203 at high current.

The working principle is the same as that of embodiment 1.

Example 5

In addition to embodiment 1, the structure of the mechanical breaking portion was changed. Referring to fig. 5, in the present embodiment, the mechanical breaking portion is a through-hole structure 208, that is, two sides of the positioning portion 201 are integrally connected to one side of the through-hole structure 204, and the mechanical breaking through-hole structure 208 is disposed at the connection between the positioning portion and the through-hole structure 204, in this example, the mechanical breaking through-hole structure 208 is a crescent through-hole, so that the mechanical strength of the melt is reduced, and the melt is more easily mechanically broken from the position of the mechanical breaking through-hole structure 208 under the action of mechanical force to form a mechanical fracture. The width of the mechanical break-off thru hole 208 is greater on both sides than the width of the throat 203 to ensure that the melt will melt from the throat 203 under high current.

The working principle is the same as that of embodiment 1.

Example 6

The structure of the through-hole structure 204 was changed over the embodiment 1. Referring to fig. 6, the through-hole structure design is changed to a solid structure 209. The solid structure 209 has a width greater than the throat 203.

The working principle is the same as that of embodiment 1.

Example 7

On the basis of embodiment 6, referring to fig. 7, two adjacent parallel melts share a mechanical breaking part 202 and a positioning part 201. While increasing the amount of melt, throat 203, and solid structure 209. The current shunt is realized through the added melt, and the melt structure of the embodiment is suitable for being used under the condition of higher rated current. The connecting end is provided with a connecting hole for installing the melt.

The working principle is the same as that of embodiment 1.

Example 8

On the basis of embodiment 7, referring to fig. 8, the positioning portion 201 and the mechanical breaking portion 202 are added, and the length of the mechanical breaking portion 202 of the adjacent positioning portion 201 is shorter than that of the mechanical breaking portion on the other side of the positioning portion 201. The connecting position of the mechanical breaking parts 202 between the adjacent positioning parts 201 is provided with a positioning hole 211, when the fuse body is installed, the positioning hole is arranged on the positioning column on the fuse shell in a penetrating mode to position the fuse body, and the mechanical breaking parts on the two sides of the positioning hole 211 are mechanical breaking parts. Be provided with at the fuse-element one side or both sides edge of locating hole 211 both sides and prevent slow-witted bulge, prevent fuse-element installation mistake. The melt structure of the embodiment is suitable for the use under the condition of larger rated current and rated voltage. The connecting end is provided with a connecting hole for installing the melt.

The working principle is the same as that of embodiment 1.

One side or two sides of the melt or the connecting end in the above embodiments are provided with fool-proof structures for preventing installation errors. The fool-proof structure is a bump, a groove or a bump-groove combination structure.

Connecting holes for melt installation can also be formed at the connecting ends of the embodiments 1 to 6.

In the melts of examples 1 to 6, the resistances of the parallel melts may be the same or different. According to the magnitude of the fault current and the resistance, the fusant can be fused in sequence, or fused in sequence and then mechanically disconnected, or mechanically disconnected in sequence, or mechanically disconnected at the same time. When mechanically disconnected afterwards, the power means for disconnecting the melt on the fuse can have a plurality of punches, each punch corresponding to at least one mechanical disconnection portion on one melt. The fuse element can also be provided with a plurality of cavities on the housing, and the melts connected in parallel in the melt structure can be respectively arranged in different cavities.

Claims

1. The utility model provides a take fuse-element structure of mechanical fracture, includes the fuse-element, is connected with the link respectively at fuse-element both ends, its characterized in that is provided with a fuse-element between two link ends at least, the fuse-element includes at least one location portion both sides respectively the integrative mechanical disconnection portion that is connected with in location portion both sides respectively be provided with at least one narrow neck in location portion one side or the mechanical disconnection portion one side of both sides.

2. The melt structure with mechanical discontinuity according to claim 1, wherein said mechanical discontinuity conductive cross-sectional width is greater than said throat width.

3. The melt structure with mechanical fractures according to claim 1, wherein a plurality of melts are integrally connected in parallel at two connecting ends.

4. The melt structure with mechanical discontinuity according to claim 1, wherein said mechanical discontinuity is a reduced mechanical strength structure.

5. The melt structure with mechanical fractures according to claim 4, wherein the mechanical breaks are one or any two combination of narrow neck structures, through hole structures and notch structures which reduce mechanical strength.

6. The melt structure with mechanical fractures according to claim 5, wherein the through-hole structure of the mechanical strength reducing structure is a crescent through-hole structure.

7. The melt structure with mechanical fractures according to claim 5, wherein the mechanical breaks on two sides of two adjacent positioning portions are through holes respectively, and the mechanical breaks on two adjacent positioning portions are connected through narrow necks.

8. The melt structure with mechanical fractures according to claim 1, wherein adjacent narrow necks are connected by a hollow through-hole structure or a solid sheet structure.

9. The melt structure with mechanical fractures according to claim 1, wherein when the melt is multiple in parallel, at least two adjacent melts share the positioning portion and the mechanical breaking portion.

10. The melt structure with mechanical fractures according to claim 9, wherein when the number of the positioning portions is at least two, at least one positioning hole is arranged at the mechanical fracture connection between two adjacent positioning portions.

11. The melt structure with mechanical fractures according to any one of claims 1 to 10, wherein a fool-proof structure is provided at the melt or connecting end.