CN220753354U

CN220753354U - Novel fuse

Info

Publication number: CN220753354U
Application number: CN202322508707.0U
Authority: CN
Inventors: 康帆; 杜磊; 张磊; 范刚鹏
Original assignee: Copper Xi'an Fuse Co ltd
Current assignee: Copper Xi'an Fuse Co ltd
Priority date: 2023-09-14
Filing date: 2023-09-14
Publication date: 2024-04-09
Anticipated expiration: 2033-09-14

Abstract

The present utility model relates to a novel fuse comprising: an insulating housing having an installation cavity formed therein to extend in a lateral direction and having both lateral ends provided as openings; a fuse which is built in a mounting cavity of the insulating housing and extends in a lateral direction; a pair of terminals fitted to inner surfaces of both lateral ends of the insulating housing to close the insulating housing in a lateral direction, one sides of the pair of terminals facing the mounting cavity being connected to both lateral ends of the fuse, respectively, and a central region of a side of each terminal facing away from the mounting cavity extending away from the mounting cavity to form a connection portion for connection to an external circuit.

Description

Novel fuse

Technical Field

The utility model relates to the technical field of circuit protection devices of electric power or electric automobiles, in particular to a novel fuse.

Background

The fuse as a short-circuit current and overcurrent protector is widely applied to various power distribution systems and control system electric equipment by virtue of the advantage that the fuse can be rapidly disconnected, and is particularly used for a semiconductor rectifying element or a rectifying device. When the protected circuit fails, the fault current passes through the fuse, so that the interior of the fuse is fused due to heat, and the protected circuit connected with the fuse in series is protected. However, the tube bodies of the prior art fuses, in particular of high-voltage high-current fuses, made of ceramic for example, are generally bulky and heavy, which obviously causes the drawbacks of high manufacturing costs and high transportation costs of the fuses due to low productivity.

Accordingly, there is a need in the art for new types of fuses that are less costly.

Disclosure of Invention

The present utility model aims to provide a fuse which can solve at least some of the problems described above.

According to an aspect of the present utility model, there is provided a novel fuse comprising: an insulating housing having an installation cavity formed therein to extend in a lateral direction and having both lateral ends provided as openings; a fuse which is built in a mounting cavity of the insulating housing and extends in a lateral direction; a pair of terminals fitted to inner surfaces of both lateral ends of the insulating housing to close the insulating housing in a lateral direction, one sides of the pair of terminals facing the mounting cavity being connected to both lateral ends of the fuse, respectively, and a central region of a side of each terminal facing away from the mounting cavity extending away from the mounting cavity to form a connection portion for connection to an external circuit.

Compared with the prior art, the novel fuse has the advantages that the connection between the fuse element and an external circuit and the connection between the wiring terminal and the insulating shell can be realized at the same time by using the wiring terminal structure, and compared with the prior art, the novel fuse has the advantages that the structure is simplified, and therefore, the manufacturing and transportation cost can be reduced. Further, the terminal of the novel fuse of the present utility model is embedded in the inner surface of the insulating housing, which not only closes the insulating housing, but also further reduces the lateral size of the novel fuse, and more novel fuses can be produced during one molding. In addition, the connection portion protruding with respect to the connection terminal can facilitate connection with an external protected circuit, and the operation is simple and convenient.

Preferably, the insulating housing is constructed as a melamine tube.

Preferably, each connection terminal is arranged on an inner surface of the respective insulating housing at a distance from a lateral end side of the insulating housing such that a connection portion thereon is arranged opposite the insulating housing in a direction transverse to the lateral direction.

Preferably, the novel fuse further includes a plurality of fasteners fixed to each terminal through the insulative housing from the outside of the insulative housing in a direction perpendicular to the lateral direction to fix the insulative housing and the pair of terminals together.

Preferably, the novel fuse further comprises an auxiliary connection hole which is positioned between the insulating housing and the connection part on each connection terminal and extends along the transverse direction.

Preferably, the novel fuse further comprises: an indication mount disposed on an outer surface of the insulating housing and provided with a mounting hole extending in a direction perpendicular to a lateral direction; and the pair of connecting sheets are used for respectively connecting the two transverse ends of the indication mounting seat to the auxiliary connecting holes on each wiring terminal.

Preferably, each connecting piece is configured to fit a first section of the corresponding connection terminal extending away from the side of the mounting cavity and a second section extending from the first section to fit the outer surface of the insulating housing.

Preferably, the insulating housing is formed at both lateral ends with recesses for receiving the first sections of the respective connecting tabs.

Preferably, the novel fuse further comprises a trigger component which is positioned in the mounting hole and extends into the insulating shell along the direction perpendicular to the transverse direction and is in linkage with the fuse.

Preferably, the novel fuse further comprises an arc extinguishing filler filled into the mounting cavity, and the novel fuse further comprises: at least two filling holes arranged in a region between the insulating housing and the connection portion of each connection terminal for feeding the arc extinguishing filler into the installation cavity from the outside; at least two closure plugs mounted to the at least two filling holes, respectively, to close the mounting cavity.

Additional features and advantages of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following, or may be learned from practice of the utility model.

Drawings

Embodiments of the present utility model are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic perspective view of a novel fuse according to the present utility model;

FIG. 2 is an exploded schematic view of a novel fuse in accordance with the present utility model;

figure 3 is a side view of the novel fuse according to the present utility model.

Reference numerals illustrate:

100-a new fuse; 10-an insulating housing; 11-a recess; 20-fusing element; 30-connecting terminals; 31-a connection; 32-an annular groove; 33-auxiliary connection holes; 40-fasteners; 51-indicating a mounting seat; 511-mounting holes; 52-connecting sheets; 60-triggering part; 61-hole cover; 62-a spring; 63-thin lines; 71-filling the hole; 72-closure plug.

Detailed Description

Referring now to the drawings, illustrative aspects of the novel fuse disclosed herein are described in detail. Although the drawings are provided to present some embodiments of the utility model, the drawings are not necessarily to scale and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure. The position of part of components in the drawings can be adjusted according to actual requirements on the premise of not affecting the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification do not necessarily refer to all figures or examples.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below" and other directional terms, will be understood to have their normal meaning and refer to those directions as they would be when viewing the drawings. Unless otherwise indicated, directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

The terms "joined," "connected," and the like as used herein, include both two components being indirectly joined together by means of an intermediate layer such as an adhesive, a solder, or the like, or an intermediate member such as a connecting member, a transition member, or the like, and also two components being directly joined together without any intermediate layer such as an adhesive, a solder, or the like, or an intermediate member such as a connecting member, a transition member, or the like.

Fig. 1 to 3 show the novel fuse 100 of the present utility model by way of example, the novel fuse 100 in this example being compact and lightweight to reduce the manufacturing and transportation costs of the novel fuse 100 of the present utility model. As shown, the new fuse 100 may include an insulative housing 10, a fuse 20, and a pair of terminals 30.

In particular, the insulating housing 10 may be made of an insulating material such as ceramic or other insulating materials known to those skilled in the art. Preferably, the insulating housing 10 may be made of melamine having a lower density of about 1.8 g/cc than ceramic, so that for the same specification of fuse, the insulating housing 10 made of melamine may have a lower weight and a smaller volume, which is particularly advantageous for high voltage high current fusing.

As shown, the insulating housing 10 may be configured in a cylindrical shape, and an installation cavity extending in a lateral direction, i.e., in an axial direction of the cylindrical insulating housing 10, may be formed inside thereof to install the fuse 20 such as a copper bar and an arc extinguishing filler such as quartz sand. The fuse 20 may extend in the axial direction within the mounting cavity of the insulating housing 10 such that both axial ends thereof are respectively connected, e.g., soldered, to a pair of terminals 30 mounted at both openings of the insulating housing 10, thereby connecting the fuse 20 in series to an external protected circuit by connecting the pair of terminals 30 in series to the external protected circuit.

Wherein the shape and size of the connection terminal 30 may be designed to match with each other with respect to the shape and size of the cross section of the installation cavity of the insulation housing 10 so as to install the connection terminal 30 to the inner surfaces of the lateral both ends of the insulation housing 10 to close the installation cavity of the insulation housing 10. As shown, the connection terminal 30 may be configured to conform to the inner circumferential surface of the cylindrical insulating housing 10 so that the connection terminal 30 is fitted to the inner circumference of the insulating housing 10. The novel fuse 100 of the present utility model is reduced in size in the axial direction compared to the terminal 30 mounted to the axial end side of the insulating housing 10 in the related art. While the peripheral wall of the terminal 30 is connected to the inner peripheral surface of the insulating housing 10, the side of the terminal 30 axially facing the mounting cavity is available for connection with the fuse 20, and the central area of the side axially facing away from the mounting cavity, i.e., the side facing the external environment, is also integrally protruded to form a connection portion 31 for connection to an external protected circuit.

It can be seen that the terminal 30 of the present utility model, by means of a single structural member, can be used to close the insulating housing 10 and can achieve multiple utilities of mechanical and electrical connection with the fusible element 20 and connection with the insulating housing 10, thereby further reducing the size of the novel fuse element 20 of the present utility model.

Alternatively, as shown in fig. 1 and 2, the connection terminals 30 may be positioned at an inner peripheral surface of the insulating housing 10 at a distance from an axial end side of the corresponding insulating housing 10. In short, the connection terminal 30 located near the left end side of the insulating housing 10 is located at a distance to the right of the left end side of the insulating housing 10 as shown, and the connection terminal 30 located near the right end side of the insulating housing 10 is located at a distance to the left of the right end side of the insulating housing 10. Further, the displacement of the connection terminals 30 with respect to the end sides of the corresponding insulating housing 10 is designed such that the connection portions 31 thereon and the insulating housing 10 are opposed to each other in the radial direction, and further such that the connection terminals 30 are fitted with the connection portions 31 thereon and the insulating housing 10 to form annular grooves 32 for arranging the subsequent various hole structures, preferably at intervals along the circumferential direction of the annular grooves 32, as shown in fig. 3.

Optionally, as shown in fig. 1 and 2, the new fuse 100 may also include a plurality of fasteners 40, such as a plurality of pins. The plurality of fasteners 40 are uniformly spaced apart at the outer circumferential surfaces of the both axial ends of the insulating housing 10, and each fastener 40 is connected to the connection terminal 30 through the insulating housing 10 from the outside of the insulating housing 10 in the radial direction of the insulating housing 10, thereby fixing the insulating housing 10 and the pair of connection terminals 30 together, and having a simple structure and convenient operation.

Optionally, as shown in fig. 1-3, the new fuse 100 may further include an indication mount 51 and a pair of connection tabs 52. The indication mount 51 extends substantially in the axial direction on the outer surface of the insulating housing 10, and axially opposite ends thereof are connected to the axially extending auxiliary connection holes 33 on the corresponding side terminals 30, respectively, by means of a connection piece 52, preferably to the axially extending auxiliary connection holes 33 arranged on the respective annular grooves 32. Wherein both ends of the connection piece 52 are connected to the indication mounting seat 51 and the connection terminal 30 by a connection member such as a screw, so that the screw connected to the annular groove 32 can be also substantially located in the annular groove 32, thereby reducing instability caused by extending beyond the insulating housing 10 and the connection portion 31 in the axial direction, and further reducing possible instability of the connection piece 52. Further, the connection piece 52 may be configured in a bent structure, which may include a first section extending in a radial direction to fit the axial outer side face of the corresponding connection terminal 30 and a second section extending in a substantially axial direction from the first section to fit the outer peripheral face of the insulating housing 10, so as to reduce the occupation space of the novel fuse 100 as much as possible. Preferably, the portions of the terminals 30 at the axial ends thereof located on the travel path of the first section may form recesses 11 extending in the axial direction so as to receive the first section, which may also serve to improve the stability of the elongated connecting piece 52.

Further, the new fuse 100 may also include a micro switch (not shown) plugged into the indicating mount 51. The indicator lever of the micro-switch may be opposite a mounting hole 511 extending radially through the indicator mount 51 and in communication with the trigger member 60 within the mounting hole 511. The triggering member 60 may extend radially into the mounting cavity of the insulative housing 10 to be coupled with the fuse 20 so as to be correspondingly operable to trigger an indication rod of the micro switch when the fuse 20 is fused, and the micro switch may thereby indicate the fused state of the fuse 20.

Illustratively, the triggering element 60 may include a hole cover 61, a spring 62, and a string 63. The wire 63 may be connected into the orifice cover 61 through the spring 62 within the orifice cover 61 and extend into the insulating housing 10 through the insulating housing 10 to maintain the spring 62 in a compressed state. When the protected circuit passes through the fault current, the fuse 20 is fused due to the excessive current and generates high temperature, the protected circuit is disconnected, meanwhile, the fine wire 63 is disconnected under the action of the high temperature, the compressed spring 62 can release energy to make the hole cover 61 spring, the hole cover 61 correspondingly pushes up the indication rod of the micro switch to move upwards, and the micro switch correspondingly indicates.

Alternatively, as shown in fig. 1 to 3, the novel fuse 100 may further include at least two filling holes 71 and sealing plugs 72 in one-to-one correspondence with the filling holes 71. The filling holes 71 may also be uniformly spaced circumferentially within the annular groove 32 and extend axially through the terminal 30 to communicate the mounting cavity of the insulating housing 10 with the external environment. In the actual installation process, after the terminal 30 is installed to the insulating housing 10, the arc extinguishing filler may be fed into the installation cavity through the filling hole 71 on the terminal 30, and the sealing plug 72 may be installed to the filling hole 71 to close the installation cavity after the filling is completed. In this manner, the arc suppressing filler located within the mounting cavity may accelerate the extinction of an arc at the break when the fuse 20 is blown to improve the reliability of the new fuse 100.

It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent alterations, modifications and combinations thereof will be effected by those skilled in the art without departing from the spirit and principles of this utility model, and it is intended to be within the scope of the utility model.

Claims

1. A novel fuse (100), the novel fuse (100) comprising:

an insulating housing (10) having an installation cavity formed therein to extend in the lateral direction and having both lateral ends provided as openings;

a fuse (20) which is built in a mounting cavity of the insulating housing (10) and extends in a lateral direction;

a pair of connection terminals (30) fitted to inner surfaces of both lateral ends of the insulating housing (10) to close the insulating housing (10) in a lateral direction, one sides of the pair of connection terminals (30) facing the mounting cavity are connected to both lateral ends of the fuse (20), respectively, and a central region of one side of each connection terminal (30) facing away from the mounting cavity extends away from the mounting cavity to form a connection portion (31) for connection to an external circuit.

2. The novel fuse (100) of claim 1, wherein the insulating housing (10) is configured as a melamine tube.

3. The novel fuse (100) of claim 1, wherein each terminal (30) is arranged on an inner surface of the insulating housing (10) at a distance from a lateral end side of the corresponding insulating housing (10) such that a connecting portion (31) thereon is arranged opposite to the insulating housing (10) in a direction transverse to the lateral direction.

4. The novel fuse (100) of claim 3, further comprising a plurality of fasteners (40) secured to each terminal (30) through the insulative housing (10) from outside the insulative housing (10) in a direction perpendicular to the transverse direction to secure the insulative housing (10) and the pair of terminals (30) together.

5. A new fuse (100) as claimed in claim 3, characterized in that the new fuse (100) further comprises auxiliary connection holes (33) in each connection terminal (30) between the insulating housing (10) and the connection portion (31) and extending in the transverse direction.

6. The novel fuse (100) of claim 5, wherein the novel fuse (100) further comprises:

an indication mount (51) which is disposed on an outer surface of the insulating housing (10) and on which a mounting hole (511) extending in a direction perpendicular to a lateral direction is provided;

and a pair of connecting pieces (52) for connecting the lateral ends of the indication mounting base (51) to the auxiliary connecting holes (33) of the respective terminals (30).

7. The novel fuse (100) of claim 6, wherein each connecting tab (52) is configured to conform to a first section of the respective terminal (30) extending away from a side of the mounting cavity and a second section extending from the first section to conform to an outer surface of the insulative housing (10).

8. The novel fuse (100) of claim 7, wherein the insulative housing (10) is formed at lateral ends with recesses (11) for receiving the first sections of the respective tabs (52).

9. The new fuse (100) of claim 6, wherein the new fuse (100) further comprises a trigger member (60) located within the mounting hole (511) and extending into the insulating housing (10) in a direction perpendicular to the lateral direction in linkage with the fuse (20).

10. The new fuse (100) of claim 3, wherein the new fuse (100) further comprises an arc suppressing filler material filled into the mounting cavity, and the new fuse (100) further comprises:

at least two filling holes (71) arranged in the region of the connection terminals (30) between the insulating housing (10) and the connecting portion (31) for feeding the arc extinguishing filler from the outside into the installation space;

at least two closure plugs (72) mounted to the at least two filling holes (71) respectively to close the mounting cavity.