Shell assembly, fuse, circuit system and electric equipment

Abstract

A housing assembly, a fuse, a circuit system and an electric device, the housing assembly comprises a first housing and a second housing, the first housing and the second housing are clamped, the first housing and the second housing jointly enclose to form a fixing hole, and the fixing hole is used for clamping and fixing a connecting terminal of the fuse. The shell assembly provided by the utility model is used for the fuse, the shell assembly comprises a first shell and a second shell, the first shell and the second shell are clamped and fixed, and a connecting terminal is clamped and fixed through a fixing hole enclosed by the first shell and the second shell; according to the shell assembly, redundant parts are fully removed, and assembling procedures can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrical protection elements, and in particular to a housing assembly, a fuse, a circuit system and an electrical device. Background Art

[0002] As a protective device for short circuit or overload current systems, fuses are widely used in electrical equipment, especially in high-voltage power distribution systems, large current loop systems, etc., and are the key to ensuring safe operation. When abnormal currents such as short circuits and large currents appear in the loop, due to the thermal effect of the energized fuse in the fuse, its heat generation continues to increase and heat accumulation continues to rise. When it reaches its tolerance limit (generally based on the melting point), it disconnects to protect each device in the loop.

[0003] However, existing fuses (especially fuse housings) have many parts, resulting in more assembly steps for the fuses. The large number of parts makes the installation process cumbersome and requires more consumable materials. In addition, the connection of multiple parts results in weak overall strength and poor reliability of the fuses. Utility Model Content

[0004] The purpose of the present application is to provide a housing assembly, a fuse, a circuit system and an electrical device to solve the problems of the existing fuse having many parts, many assembly steps and poor reliability after assembly.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the utility model provides a housing assembly, which includes a first shell and a second shell, the first shell and the second shell are snap-connected, the first shell and the second shell together enclose a fixing hole, and the fixing hole is used to snap-connect and fix the connecting terminal of the fuse.

[0007] In one embodiment, the first shell includes a first hook, and the second shell includes a first hole, and the first hook is engaged with the first hole.

[0008] In one embodiment, the first shell further includes a second latch hole, and the second latch hole and the first latch hook are spaced apart; the second shell further includes a second latch hook, and the second latch hook is spaced apart from the first latch hole, and the second latch hook is engaged in the second latch hole.

[0009] In one embodiment, the first hook and the second hook hole are arranged opposite to each other in the width direction of the first shell, and the second hook and the first hook hole are arranged opposite to each other in the width direction of the second shell.

[0010] In one embodiment, there are multiple first hooks and multiple first holes, and the multiple first hooks and the first holes are connected in a one-to-one correspondence; and / or there are multiple second holes and the second hooks, and the multiple second holes and the second hooks are connected in a one-to-one correspondence.

[0011] In one embodiment, a first bayonet is formed at at least one end of the first shell in the length direction, and a second bayonet is formed at an end of the second shell opposite to the first bayonet in the length direction, and the first bayonet and the second bayonet are connected to form the fixing hole.

[0012] In a second aspect, the present application provides a fuse, comprising a fuse element, an arc-extinguishing medium, a connecting terminal and a shell assembly as described in the first aspect, wherein the shell assembly encloses a receiving cavity, the fuse element and the arc-extinguishing medium are both received in the receiving cavity, and the two opposite ends of the fuse element are respectively connected to the connecting terminals.

[0013] In one embodiment, the connecting terminal includes a first connecting platform, a column and a second connecting platform; the column is passed through the fixing hole, the first connecting platform and the second connecting platform are arranged at opposite ends of the column, and the second connecting platform is arranged in the receiving cavity.

[0014] In one embodiment, there are multiple melts, and all of the multiple melts are connected to the second connecting station.

[0015] In one embodiment, the connecting terminal is provided with a filling hole, the filling hole passes through the connecting terminal and is connected to the receiving cavity; the fuse also includes a plug, the plug is received in the filling hole, and the plug and the connecting terminal are detachably connected to close the filling hole.

[0016] In a third aspect, the present application provides a circuit system, comprising the fuse and a connecting circuit as described in the second aspect, wherein the fuse is arranged on the connecting circuit.

[0017] In a fourth aspect, the present application provides an electrical device, including the fuse described in the second aspect, or, including the circuit system described in the third aspect.

[0018] The shell assembly provided by the utility model is used for a fuse, and the shell assembly includes a first shell and a second shell, wherein the first shell and the second shell are clamped and fixed, and the connecting terminal is clamped and fixed through a fixing hole enclosed by the first shell and the second shell; the shell assembly fully removes redundant parts and can reduce the assembly process. Compared with the existing screw connection method, the shell assembly provided by the utility model saves bolts, baffles and other components, and saves thread fastening glue and baking curing processes; compared with the existing riveting method, it saves drilling, pinning and other processes, and uses fewer parts and has higher connection reliability than the existing interference fit method. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is an appearance structure diagram of a fuse in one embodiment;

[0021] Figure 2 is an internal structural diagram of a fuse according to an embodiment;

[0022] Figure 3 is a cross-sectional structural diagram of a fuse according to an embodiment;

[0023] Figure 4 is an appearance structural diagram of a housing assembly of an embodiment;

[0024] Figure 5 is an exploded structural diagram of a housing assembly according to an embodiment.

[0025] Description of reference numerals:

[0026] 100-fuse;

[0027] 10-housing assembly, 11-first housing, 111-front plate 1, 112-rear plate 1, 113-left plate 1, 114-right plate 1, 11A-first hook, 11B-second hook hole, 12-second housing, 121-front plate 2, 122-rear plate 2, 123-left plate 2, 124-right plate 2, 12A-first hook hole, 12B-second hook, 13-accommodating cavity, 13A-first cavity, 13B-second cavity, 14-fixing hole, 14A-first bayonet, 14B-second bayonet;

[0028] 20-connection terminal, 20A-first connection terminal, 20B-second connection terminal, 21-first connection platform, 22-column, 23-second connection platform, 24-filling hole, 25-plug;

[0029] 30-melt, 40-arc extinguishing medium;

[0030] X-length direction, Y-width direction, Z-thickness direction. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0034] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] The utility model provides a fuse 100, please refer to Figures 1 to 3 The fuse 100 includes a housing assembly 10, a connecting terminal 20, a fuse 30 and an arc extinguishing medium 40, wherein the housing assembly 10 encloses a receiving cavity 13, the fuse 30 and the arc extinguishing medium 40 are both received in the receiving cavity 13, and two opposite ends of the fuse 30 are respectively connected to two connecting terminals 20.

[0036] In one implementation, please refer to Figure 4 and Figure 5The housing assembly 10 includes a first shell 11 and a second shell 12. The first shell 11 and the second shell 12 are clamped and enclose a receiving cavity 13. The first shell 11 and the second shell 12 are together enclosed to form a fixing hole 14, and the fixing hole 14 is used to clamp and fix the connecting terminal 20 of the fuse 100.

[0037] Specifically, the appearance of the first shell 11 can be a rectangular parallelepiped, and in other embodiments, it can also be a semi-cylinder. The first shell 11 is formed with a first opening and a first cavity 13A, and the first cavity 13A is connected to the external space through the first opening. The appearance of the second shell 12 can be a rectangular parallelepiped, and in other embodiments, it can also be a semi-cylinder. The second shell 12 is formed with a second opening and a second cavity 13B, and the second cavity 13B is connected to the external space through the second opening. It can be understood that the first shell 11 and the second shell 12 are connected at the first opening and the second opening, and the first cavity 13A and the second cavity 13B are connected to form the receiving cavity 13.

[0038] Optionally, after the first shell 11 and the second shell 12 are connected, a shell with a rectangular appearance is formed. Of course, in other embodiments, after the first shell 11 and the second shell 12 are connected, a shell with a cylindrical appearance can also be formed. For the convenience of description, the following takes the rectangular shell as an example. Therefore, the housing assembly 10 may include a length direction X, a width direction Y and a thickness direction Z, wherein the length direction X is the direction of current flow in the fuse 100, and the thickness direction Z is the direction in which the first shell 11 and the second shell 12 are relatively engaged.

[0039] Furthermore, a first matching portion is provided on the first shell 11, and a second matching portion is provided on the second shell 12. The first matching portion and the second matching portion are detachably clamped and connected, and the first shell 11 and the second shell 12 are clamped together by the first matching portion and the second matching portion.

[0040] Optionally, there is no limitation on the form of the first matching portion and the second matching portion, including but not limited to: the first matching portion and the second matching portion form a snap connection or a slot connection, etc.

[0041] In a specific embodiment, the first mating portion and the second mating portion form a snap connection, that is, the first mating portion (or the second mating portion) can be a snap, and the second mating portion (or the first mating portion) can be a snap hole, and the two are connected and fixed by snapping the snap into the snap hole.

[0042] In other specific embodiments, the first mating portion and the second mating portion form a slot connection, that is, the first mating portion (or the second mating portion) can be a recessed groove, and the second mating portion (or the first mating portion) can be a protruding boss, and the two are connected and fixed by snapping the boss into the groove.

[0043] It can be understood that the first shell 11 and the second shell 12 form a mating connection through the first mating part and the second mating part, and there is no restriction on the connection formation. The purpose of using the mating part to form a mating connection is to improve the firmness of the connection between the first shell 11 and the second shell 12 and make the two difficult to separate.

[0044] The first shell 11 and the second shell 12 are connected to form the housing assembly 10, and the first shell 11 and the second shell 12 jointly enclose a fixing hole 14 for fixing the connecting terminal 20. Optionally, the fixing hole 14 can be a notch opened on the first shell 11 or the second shell 12. After the first shell 11 or the second shell 12 is connected, the notch forms a circumferentially closed perforated structure, thereby forming the fixing hole 14; or, there are notches on both the first shell 11 and the second shell 12, and the two notches are aligned to form the fixing hole 14. There are two fixing holes 14, which are respectively located at the two opposite ends of the housing assembly 10 in the length direction X.

[0045] The two connection terminals 20 are respectively a first connection terminal 20A and a second connection terminal 20B, wherein the first connection terminal 20A can be a positive connection terminal, and the second connection terminal 20B can be a negative connection terminal. The first connection terminal 20A and the second connection terminal 20B have the same structure and shape, so they are both referred to as connection terminals 20 in the following. The two connection terminals 20 are respectively arranged at both ends, wherein the first connection terminal 20A can pass through one fixing hole 14, and the second connection terminal 20B can pass through another fixing hole 14. Both connection terminals 20 extend into the receiving cavity 13 and are connected to the melt 30. Therefore, the connection terminal 20 should be made of metal.

[0046] The housing assembly 10 provided by the utility model is used for a fuse 100. The housing assembly 10 includes a first housing 11 and a second housing 12, wherein the first housing 11 and the second housing 12 are clamped and fixed, and the connecting terminal 20 is clamped and fixed through a fixing hole 14 enclosed by the first housing 11 and the second housing 12; the housing assembly 10 fully removes redundant parts and can reduce assembly processes. Compared with the existing screw connection method, the housing assembly 10 provided by the utility model saves components such as bolts and baffles, and saves thread fastening glue and baking curing processes; compared with the existing riveting method, it saves drilling, pinning and other processes, and uses fewer parts and has higher connection reliability than the existing interference fit method.

[0047] In one embodiment, the first shell 11 and the second shell 12 can be made of a nylon-based composite material. This material has a high melting point and a certain toughness. It will become tighter and tighter under the pressure of heat or internal high-pressure gas arc, achieving a higher connection strength than when assembled, and will not come off or crack. At the same time, flame retardant materials can be added to the first shell 11 and the second shell 12, which can effectively prevent the fuse 100 from overheating, burning through, and leakage of the filling medium.

[0048] In one implementation, please refer to Figure 4 and Figure 5 The first housing 11 includes a first hook 11A, and the second housing 12 includes a first hole 12A. The first hook 11A is locked in the first hole 12A.

[0049] Specifically, the first shell 11 includes a shell body 1 and a first matching portion, the first matching portion includes a first clip, the shell body 1 is formed with a first opening and a first cavity 13A, the first clip is arranged on the end surface of the first opening, and the first clip extends along the thickness direction Z. The second shell 12 includes a shell body 2 and a second matching portion, the second matching portion includes a first clip hole 12A, the shell body 2 is formed with a second opening and a second cavity 13B, and the first clip hole 12A is opened on the wall surface of the shell body 2. After the first shell 11 and the second shell 12 are connected, the first clip hook 11A is clipped into the first clip hole 12A.

[0050] Optionally, the shell body 1 includes a front plate 111 and a rear plate 112 relative to each other in the width direction Y, and the first hook 11A can be arranged on the front plate 111 and / or the rear plate 112, that is, the first hook 11A can be only one and is arranged on the front plate 111 or the rear plate 112; or, the second hook 12B can be multiple, and at least one first hook 11A is arranged on each of the front plate 111 and the rear plate 112.

[0051] Optionally, the shell body 2 includes a front plate 2 121 and a rear plate 2 122 that are opposite to each other in the width direction Y, wherein the front plate 2 121 is connected to the front plate 1 111, and the rear plate 2 122 is connected to the rear plate 1 112. The first clamping hole 12A can be opened on the front plate 2 121 and / or the rear plate 2 122, and the first clamping hole 12A can pass through the plate body. It can be understood that the number of the first clamping holes 12A and the first clamping hook 11A should be the same, so the number and position of the first clamping holes 12A can be based on the first clamping hook 11A, which will not be repeated here.

[0052] For example, the number of the first hooks 11A and the number of the first holes 12A can be four, wherein two first hooks 11A are respectively provided on the front plate 111 and the rear plate 112, and two second holes 11B are respectively provided on the front plate 2 121 and the rear plate 2 122. Thus, after the first shell 11 and the second shell 12 are connected, the four first hooks 11A are all locked into the corresponding first holes 12A.

[0053] The snap-fit ​​connection and fixing method can save the manufacturing cost of the housing assembly 10 and reduce the use of redundant parts, thereby reducing the assembly process.

[0054] In one implementation, please refer to Figure 4 and Figure 5 The first shell 11 further includes a second hook 11B, which is spaced apart from the first hook 11A; the second shell 12 further includes a second hook 12B, which is spaced apart from the first hook 12A, and the second hook 12B is locked into the second hook 11B.

[0055] Specifically, the first matching portion further includes a second clamping hole 11B, which can be provided on the front plate 111 and / or the rear plate 112, and the second clamping hole 11B can penetrate the plate body. The second matching portion further includes a second clamping hook 12B, which can be provided on the front plate 121 and / or the rear plate 122. The shape and structure of the second clamping hook 12B and the first clamping hook 11A can be the same, and will not be described in detail here.

[0056] It can be understood that in the present invention, the first matching part and the second matching part are composed of two parts, namely a hook and a hole, wherein the first matching part includes a first hook 11A and a second hole 11B, and the second matching part includes a first hole 12A and a second hook 12B.

[0057] By arranging hooks and holes on both the first shell 11 and the second shell 12, the first shell 11 and the second shell 12 can be interlocked and connected, thereby reinforcing the connection strength between the two; and when the fuse 100 is subjected to an expansion force expanding from the inside to the outside, the buckle structure can be tightened due to the interlocking, thereby resisting the pressure of the internal high-temperature air arc on the plastic wall and preventing it from exploding; at the same time, the first shell 11 and the second shell 12 can be of the same structure, that is, the first shell 11 and the second shell 12 can be obtained by using one production mold, thereby reducing the manufacturing cost.

[0058] In one embodiment, the effective engagement amount of the hook (including the first hook 11A and the second hook 12B) and the hole (including the first hole 12A and the second hole 11B) is about 2 mm to 3 mm.

[0059] In one implementation, please refer to Figure 4 and Figure 5 The first hook 11A and the second hole 11B are arranged opposite to each other in the width direction Y of the first shell 11 , and the second hook 12B and the first hole 12A are arranged opposite to each other in the width direction Y of the second shell 12 .

[0060] Specifically, on the first shell 11, the first matching part can be arranged in a manner that the first hook 11A is on one side and the second hook hole 11B is on one side. The first hook 11A can be arranged on the front plate 111 mentioned above, and the second hook hole 11B can be opened on the rear plate 112 mentioned above. Then, on the second shell 12, the second matching part can be arranged in a manner that the second hook 12B is on one side and the first hook hole 12A is on one side. The first hook hole 12A can be opened on the front plate 2 121 mentioned above, and the second hook 12B can be arranged on the rear plate 2 122 mentioned above.

[0061] By arranging the first shell 11 and the second shell 12 to have the same structure, and the hooks and the holes are located on different sides, the first shell 11 and the second shell 12 can be interlocked, thereby increasing the connection strength of the first shell 11 and the second shell 12.

[0062] In one embodiment, the first hook 11A and the second hole 11B are arranged at a relative interval in the length direction X (not shown in the figure), and the second hook 12B and the first hole 12A are arranged at a relative interval in the length direction X.

[0063] Specifically, on the first shell 11, the first matching part can also be arranged in such a way that the first hook 11A and the second hole 11B are on the same side. The first hook 11A can be arranged on the front plate 1 111 mentioned above, and the second hole 11B can be opened on the front plate 1 111 mentioned above, and the two are arranged at an interval. Then, on the second shell 12, the second matching part can also be arranged in such a way that the second hook 12B and the first hole 12A are on the same side. The first hole 12A can be opened on the front plate 2 121 mentioned above, and the second hook 12B can be arranged on the front plate 2 121 mentioned above, and the two are arranged at an interval.

[0064] In one implementation, please refer to Figure 4 and Figure 5 , there are multiple first hooks 11A and first holes 12A, and the multiple first hooks 11A and first holes 12A are connected one-to-one; and / or, there are multiple second holes 11B and second hooks 12B, and the multiple second holes 11B and second hooks 12B are connected one-to-one.

[0065] Specifically, based on the above embodiment, in the embodiment where the first hook 11A is on one side and the second hole 11B is on one side, the plurality of first hooks 11A are distributed on one side, and the second holes 11B are also distributed on one side. For example, the number of the first hooks 11A and the first holes 12A are both two, that is, two first hooks 11A are provided on the front plate 111, and two second holes 11B are provided on the rear plate 112. Of course, the second matching portion on the second housing 12 is also arranged in accordance with the first matching portion, which will not be described in detail here.

[0066] Optionally, based on the above embodiment, in the embodiment where the first hook 11A and the second hole 11B are on the same side, a plurality of first hooks 11A and a plurality of second holes 11B are evenly distributed on both sides. For example, the number of the first hook 11A and the number of the first hole 12A are both two, that is, the front plate 111 is provided with a first hook 11A and a second hole 11B, and the rear plate 112 is provided with a first hook 11A and a second hole 11B. Of course, the second matching portion on the second housing 12 is also arranged in accordance with the first matching portion, which will not be described in detail here.

[0067] In one implementation, please refer to Figure 4 and Figure 5 A first bayonet 14A is formed at at least one end of the first shell 11 in the length direction X, and a second bayonet 14B is formed at an end of the second shell 12 opposite to the first bayonet 14A in the length direction X. The first bayonet 14A and the second bayonet 14B are connected to form a fixing hole 14.

[0068] Specifically, the first housing 11 is provided with first bayonet openings 14A at both ends opposite to each other in the length direction X, that is, two first bayonet openings 14A are provided on the first housing 11, respectively located at the two ends of the first housing 11. The first housing 11 includes a left plate 113 and a right plate 114 that are arranged opposite to each other in the length direction X, and a first bayonet opening 14A is provided on each side of the left plate 113 and the right plate 114 that are located at the first opening, that is, the first bayonet opening 14A is formed on the end faces of the left plate 113 and the right plate 114, and extends along the thickness direction Z. Therefore, before the first housing 11 and the second housing 12 are connected, the first bayonet opening 14A forms a circumferentially connected bayonet opening shaped structure.

[0069] It can be understood that the second shell 12 includes a left plate 123 and a right plate 124 that are relatively arranged in the length direction X. After the first shell 11 and the second shell 12 are connected, the left plate 113 and the left plate 123 are connected, and the right plate 114 and the right plate 124 are connected, so that the first bayonet 14A forms a circumferentially closed perforated structure.

[0070] On the basis of the above-mentioned embodiment, the second housing 12 is provided with a second bayonet 14B at both ends opposite to each other in the length direction X, that is, two second bayonet 14B are provided on the second housing 12, respectively located at the two ends of the second housing 12. The second housing 12 includes a left plate 123 and a right plate 124 arranged opposite to each other in the length direction X, and a second bayonet 14B is provided on each side of the left plate 123 and the right plate 124 located at the second opening, that is, the second bayonet 14B is formed on the end surface of the left plate 123 and the right plate 124, and extends along the thickness direction Z. Therefore, before the first housing 11 and the second housing 12 are connected, the second bayonet 14B forms a slot-like structure connected in the circumferential direction.

[0071] It can be understood that the second shell 12 includes a left plate 123 and a right plate 124 that are relatively arranged in the length direction X. After the first shell 11 and the second shell 12 are connected, the left plate 113 and the left plate 123 are connected, and the right plate 114 and the right plate 124 are connected, so that the first bayonet 14A and the second bayonet 14B form a circumferentially closed perforated structure, which is the fixing hole 14.

[0072] In one implementation, please refer to Figure 2 The connecting terminal 20 includes a first connecting platform 21, a column 22 and a second connecting platform 23; the column 22 is inserted into the fixing hole 14, the first connecting platform 21 and the second connecting platform 23 are arranged at opposite ends of the column 22, and the second connecting platform 23 is arranged in the receiving cavity 13.

[0073] Specifically, the connection terminal 20 is composed of three parts, namely, a first connection platform 21, a column 22 and a second connection platform 23, which are an integrated structure. The two ends of the column 22 that are separated from each other in the length direction X are respectively connected to the first connection platform 21 and the second connection platform 23. The column 22 is used to be inserted into the fixing hole 14; the first connection platform 21 is located outside the receiving cavity 13, and the first connection platform 21 is used to connect with other conductive circuits; the second connection platform 23 is located inside the receiving cavity 13, and the second connection platform 23 is used to connect with the melt 30.

[0074] Optionally, the cross-sectional shape of the column 22 can be a quadrilateral, and the outline shape of the fixing hole 14 is also a quadrilateral. It can be understood that the first bayonet 14A and the second bayonet 14B mentioned above are both engaged with the column 22, so that the connecting terminal 20 is connected and fixed to the first shell 11 and the second shell 12.

[0075] Optionally, the cross-sectional shapes of the first connection platform 21 and the second connection platform 23 are both quadrilaterals, and the cross-sectional areas of the first connection platform 21 and the second connection platform 23 are larger than the cross-sectional areas of the column 22, and the cross-sectional areas of the first connection platform 21 and the second connection platform 23 are also larger than the area of ​​the fixing hole 14. In this way, after the connection terminal 20 is connected to the first shell 11 and the second shell 12, the connection terminal 20 will not slide along the length direction X and fall out of the shell under the restriction of the first connection platform 21 and the second connection platform 23.

[0076] Optionally, the cross-sectional area of ​​the first connecting platform 21 is smaller than that of the second connecting platform 23 . Since there may be multiple melts 30 in the receiving cavity 13 , the cross-sectional area of ​​the second connecting platform 23 may be larger so as to connect more melts 30 .

[0077] In one embodiment, there are multiple melts 30, and the multiple melts 30 are all connected to the second connection platform 23. Specifically, the multiple melts 30 are arranged in sequence and at intervals in the receiving cavity, and the arc extinguishing medium 40 can be filled between two adjacent melts 30. In addition, the two opposite ends of the multiple melts 30 are connected to two opposite second connection platforms 23. Since the area of ​​the second connection platform 23 is large, more melts 30 can be connected.

[0078] In one implementation, please refer to Figure 2 The connecting terminal 20 is provided with a filling hole 24, which passes through the connecting terminal 20 and communicates with the accommodating cavity 13; the fuse 100 also includes a plug 25, which is accommodated in the filling hole 24, and the plug 25 and the connecting terminal 20 are detachably connected to conduct or close the filling hole 24.

[0079] Specifically, the connection terminal 20 is provided with a filling hole 24, and the filling hole 24 penetrates the connection terminal 20 along the length direction X, that is, the filling hole 24 sequentially penetrates the first connection platform 21, the column 22, and the second connection platform 23, and is connected to the receiving cavity 13 of the external space. The filling hole 24 can be used to inject the arc extinguishing medium 40. The plug 25 is used to block the filling hole 24, and the filling hole 24 can be blocked after the arc extinguishing medium 40 is injected.

[0080] In one embodiment, the installation method of the fuse 100 may include: the melt 30 is electrically connected to the connection terminal 20 by means of resistance welding or the like, the whole after the melt 30 and the connection terminal 20 are connected is placed in the first housing 11 (or the second housing 12), and then the second housing 12 (or the first housing 11) is installed, the first housing 11 and the second housing 12 are interlocked and connected by the first matching part and the second matching part, and the specific structure of the first matching part and the second matching part can be a hook and a hole. During the assembly process, the whole after the melt 30 and the connection terminal 20 are connected is fixed by a fixture to prevent the melt 30 from being damaged by external forces.

[0081] After assembly, the first housing 11 and the second housing 12 enclose the receiving cavity 13, and the melt 30 is received in the receiving cavity 13. The filling hole 24 is located at the center of the connecting terminal 20, and the arc extinguishing medium 40 enters the receiving cavity 13 through the filling hole 24 until the arc extinguishing medium 40 is completely filled and sealed by the plug 25.

[0082] The two shells of the fuse 100 provided by the utility model can be interlocked and connected through a snap-on structure. The snap-on structure can be a dead buckle with high structural strength and not easy to disassemble, or a strong release buckle that resists falling. When the fuse 100 is subjected to an expansion force that expands from the inside to the outside, the snap-on structure can be pulled tighter and tighter due to the interlocking, so as to resist the pressure of the internal high-temperature air arc on the plastic wall without exploding. At the same time, flame retardant materials are added to the first shell 11 and the second shell 12, which can well prevent the fuse 100 from overheating, burning through, and leakage of the filling medium. The melt 30 is made of a metal material with good electrical and thermal conductivity. When connected in the circuit, the working principle is the same as other fuses 100, all of which rely on the thermal effect of the current to achieve current limiting and protect the circuit safety.

[0083] In summary, compared with the prior art, the advantages of the present invention are green production, energy saving and environmental protection, reliable connection can be ensured with minimal parts and components, and the process is greatly simplified.

[0084] In one embodiment, the utility model further provides a circuit system, including a fuse 100 and a connecting circuit, wherein the fuse 100 is arranged on the connecting circuit.

[0085] In one embodiment, the utility model further provides an electrical device, including the fuse 100 or the circuit system described above. The electrical device may be a terminal device such as a battery pack, a new energy vehicle, or an energy storage cabinet.

[0086] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0087] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A housing assembly for a fuse, characterized in that: The housing assembly includes a first shell and a second shell, the first shell and the second shell are snap-connected, and the first shell and the second shell are jointly enclosed to form a fixing hole, and the fixing hole is used to snap-connect and fix the connecting terminal of the fuse.

2. The housing assembly according to claim 1, characterized in that The first shell includes a first hook, the second shell includes a first hole, and the first hook is engaged in the first hole.

3. The housing assembly according to claim 2, characterized in that The first shell further includes a second latch hole, which is spaced apart from the first latch hook; the second shell further includes a second latch hook, which is spaced apart from the first latch hole, and the second latch hook is engaged with the second latch hole.

4. The housing assembly according to claim 3, characterized in that: The first hook and the second hook hole are arranged opposite to each other in the width direction of the first shell, and the second hook and the first hook hole are arranged opposite to each other in the width direction of the second shell.

5. The housing assembly according to claim 3, characterized in that: There are multiple first hooks and multiple first holes, and the multiple first hooks and the first holes are connected in a one-to-one correspondence; and / or there are multiple second holes and multiple second hooks, and the multiple second holes and the second hooks are connected in a one-to-one correspondence.

6. The housing assembly according to claim 1, wherein: A first bayonet is provided at at least one end of the first shell in the length direction, and a second bayonet is provided at one end of the second shell in the length direction opposite to the first bayonet. The first bayonet and the second bayonet are connected to form the fixing hole.

7. A fuse, characterized in that: It comprises a fuse, an arc extinguishing medium, a connecting terminal and a shell component as described in any one of claims 1 to 6, wherein the shell component encloses a receiving cavity, the fuse and the arc extinguishing medium are both received in the receiving cavity, and the two opposite ends of the fuse are respectively connected to the connecting terminals.

8. The fuse according to claim 7, characterized in that: The connecting terminal comprises a first connecting platform, a column and a second connecting platform; the column is passed through the fixing hole, the first connecting platform and the second connecting platform are arranged at opposite ends of the column, and the second connecting platform is arranged in the receiving cavity.

9. The fuse according to claim 8, characterized in that: There are multiple melts, and all of the multiple melts are connected to the second connecting station.

10. The fuse according to claim 7, characterized in that: The connecting terminal is provided with a filling hole, which passes through the connecting terminal and communicates with the receiving cavity; the fuse also includes a plug, which is received in the filling hole, and the plug and the connecting terminal are detachably connected to close the filling hole.

11. A circuit system, characterized in that: It comprises a fuse and a connecting circuit as described in any one of claims 7 to 10, wherein the fuse is arranged on the connecting circuit.

12. An electrical equipment, characterized in that: Comprising the fuse as claimed in any one of claims 7 to 10, or, comprising the circuit system as claimed in claim 11.

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