Fuse

Abstract

The utility model discloses a fuse, and relates to the technical field of electrical equipment, the fuse comprises a fusion tube, a fuse body and a pressing plate, the center of the fusion tube is provided with an accommodating cavity, the two ends of the fusion tube are provided with openings, the two ends of the fuse body are detachably connected with clamping plates respectively, the two clamping plates abut against limiting protrusions arranged on the two openings respectively, and the pressing plate is arranged in the accommodating cavity. The fuse body is fixed in the containing cavity in a tensioning mode through the two clamping plates, then the clamping plates are pressed and fixed to the two ends of the fusion tube through the pressing plates, the fuse body can be assembled in the fusion tube, the fixing mode of the fuse body is changed into pressing connection from original butt welding, butt welding does not need to be conducted by means of a butt welding machine in the assembling process, equipment investment is reduced, assembling time is shorter, assembling steps are simple, and assembling efficiency is improved. And the whole assembly process is time-saving and labor-saving, and the production cost is

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a fuse. Background Art

[0002] As global demand for green energy continues to grow, electrical safety issues in photovoltaic solar power generation systems, energy storage systems, and charging station systems are becoming increasingly prominent. Fuses, as current protectors, provide overload protection, short-circuit protection, and undercurrent protection. Fuses use a metal conductor as a melt connected in series with the circuit being protected. When an overload or short-circuit occurs in the circuit, the current passing through the fuse exceeds a specified value, and the heat generated by the fuse melts the melt, automatically disconnecting the circuit and effectively preventing fires and electrical accidents. The use of fuses can improve the safety, stability, and reliability of the system.

[0003] Existing fuse elements come in filament, sheet, and grid shapes. Flash butt welding machines are often used to manufacture these elements. Flash butt welding machines are energy-intensive welding machines that utilize the electrical resistance between the contact surfaces of two workpieces to instantly pass a low voltage and high current, causing them to heat and melt instantly, fusing the two workpieces. The butt welding process, which requires high precision and is complex, leads to high production costs for fuses. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a fuse that solves the technical problem of high production cost of existing fuses due to complex production process.

[0005] To achieve the above object, the present invention provides a fuse, comprising:

[0006] A melting tube, wherein a receiving cavity is provided in the center of the melting tube, and openings are formed at both ends of the melting tube and are communicated with the receiving cavity;

[0007] The melt is detachably connected to a clamping plate at each end of the melt, and each clamping plate abuts against a limiting protrusion provided on the opening, and the melt is tightened and fixed in the accommodating cavity by the clamping plate;

[0008] The pressure plate is detachably fixed to the end of the melting tube, and the pressure plate abuts against the clamping plate. The pressure plate is used to press the clamping plate tightly and fix it to the end of the melting tube.

[0009] Preferably, the melt comprises a plurality of stacked melt sheets, and mutually cooperating hooks and holes are provided between the two ends of each melt sheet and the clamping plate.

[0010] Preferably, both ends of each fuse are folded to form hooks, and the hooks match with the holes provided on the clamping plate.

[0011] Preferably, all the fuses include an upper fuse and a lower fuse that are symmetrically distributed up and down, and both ends of the upper fuse are provided with lower hooks that are folded vertically downward, and both ends of the lower fuse are provided with upper hooks that are folded vertically upward.

[0012] Preferably, both ends of each fuse are extended to form T-shaped teeth, a connecting plate is fixedly provided on the side of the clamping plate facing the fuse, the connecting plate is provided with a U-shaped groove, and the T-shaped teeth match the U-shaped groove.

[0013] Preferably, each fuse includes a plurality of fuse parts, each of which is formed with a plurality of through holes arranged linearly; any two adjacent fuse parts are integrally connected via an elastic part, and the fuse expands and contracts along the axial direction of the accommodating cavity via the elastic part.

[0014] Preferably, the elastic portion is a V-shaped protrusion, an arc protrusion or a W-shaped protrusion.

[0015] Preferably, the limiting protrusion is an annular protrusion or a radial lug formed on the inner side wall of the opening.

[0016] Preferably, the end faces of the clamping plate and the melting tube are flush.

[0017] Compared with the background technology, the present invention optimizes the structure of the fuse. The optimized fuse includes a melting tube, a melt and a pressure plate. A accommodating cavity is provided in the center of the melting tube and openings are formed at both ends. The two ends of the melt are detachably connected with clamping plates, and the two clamping plates are respectively abutted against the limiting protrusions provided on the two openings, so that the melt is tensioned and fixed in the accommodating cavity by the two clamping plates. The pressure plate is then used to press and fix the clamping plates on the two ends of the melting tube, so that the melt can be assembled in the melting tube. The fixing method of the melt is changed from the original butt welding to crimping. No butt welding machine is required for butt welding during assembly, so the equipment investment is reduced, the assembly time is shorter, the assembly steps are simple, the entire assembly process is time-saving and labor-saving, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 A structural diagram of a fuse provided in a specific embodiment of the utility model;

[0020] Figure 2 for Figure 1 Assembly diagram of the middle pallet and melt;

[0021] Figure 3 for Figure 1 Exploded diagram;

[0022] Figure 4 for Figure 1 Partial exploded view;

[0023] Figure 5 for Figure 1 Structural diagram of the medium-melt tube.

[0024] The reference numerals are as follows:

[0025] Melting tube 1, melt 2, clamping plate 3 and pressing plate 4;

[0026] The accommodating cavity 11 and the opening 12;

[0027] Limiting protrusion 121;

[0028] Fusing piece 21;

[0029] Hook 211, fuse portion 212, through hole 213 and elastic portion 214;

[0030] Card hole 31. DETAILED DESCRIPTION

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

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] The embodiment of the utility model discloses a fuse, as shown in the attached Figures 1 to 4 As shown, it includes a melting tube 1, a melt 2 and a pressure plate 4. The melting tube 1 is a hollow structure, and the cross-section is preferably rectangular, but it can also be circular or other shapes. The melting tube 1 is a protective shell of the melt 2, made of heat-resistant insulating material, and has an arc extinguishing function when the melt 2 melts. A receiving cavity 11 is provided in the center of the melting tube 1 for accommodating the melt 2. Openings 12 are formed at both ends of the melting tube 1, and the two openings 12 are respectively connected to the receiving cavity 11. The cross-sectional area of the receiving cavity 11 is larger than the cross-sectional area of the opening 12. As a preferred embodiment, end plates are respectively fixed at both ends of the melting tube 1, and the centers of the two end plates are provided with openings 12 for the melt 2 to pass through.

[0034] The two ends of the melt 2 are detachably connected to the clamping plates 3, and the two openings 12 are provided with limiting protrusions 121. Figure 5As shown, each clamping plate 3 abuts against the limiting protrusion 121, so that the melt 2 is tensioned and fixed in the accommodating chamber 11 by the two clamping plates 3. The clamping plates 3 are abutted and connected to the opening 12 of the melting tube 1, which facilitates the disassembly and assembly of the melt 2. As a preferred embodiment, the two openings 12 of the melting tube 1 are provided with stepped grooves, and the annular protrusions of the stepped grooves are protrudingly formed on the inner side walls of the openings 12. The annular protrusions are the limiting protrusions 121, that is, the clamping plates 3 abut against the annular protrusions of the stepped grooves of the openings 12, and the position of the melt 2 in the accommodating chamber 11 is limited along the axial direction of the accommodating chamber 11 by means of the two clamping plates 3, so that the melt 2 is fixed relative to the accommodating chamber 11. Of course, the structure of the limiting protrusion 121 is not limited to an annular protrusion; it can also be a radial lug. The radial lug extends from the inner sidewall of the opening 12 along the radial direction of the opening 12 toward the center of the opening 12. The inner sidewall of the opening 12 is integrally provided with a plurality of radial lugs, all of which have equal radial lengths and are evenly distributed in a circular shape. As a preferred embodiment, the inner sidewall of the opening 12 is specifically provided with three radial lugs, which are equiangularly distributed.

[0035] The pressure plate 4 is detachably fixed to the end of the melting tube 1. Each end of the melting tube 1 is provided with a clamping plate 3 and a pressure plate 4, and the clamping plate 3 and the pressure plate 4 provided at each end of the melting tube 1 are correspondingly abutted against each other. The pressure plate 4 is used to press and fix the clamping plate 3 to the end of the melting tube 1 to ensure that the melt 2 is reliably fixed in the accommodating cavity 11. Each pressure plate 4 is preferably a rectangular plate, and the four top corners of each pressure plate 4 are detachably fixed to the end plate of the melting tube 1 by means of four fastening screws. The pressure plate 4 is not limited to a rectangle and can be flexibly adjusted according to the cross-sectional shape of the melting tube 1. The clamping plate 3 is provided with at least one through hole, and the pressure plate 4 is provided with at least one structural hole, and all the structural holes are connected to all the through holes in a one-to-one manner. As a preferred embodiment, two circular through holes of equal diameter are provided in the center of the clamping plate 3 and the center of the pressure plate 4.

[0036] It should be noted that the thickness of the clamping plate 3 is equal to the depth of the stepped groove of the opening 12, and the end faces of the clamping plate 3 and the melting tube 1 are flush, so that the pressure plate 4 is against the clamping plate 3 and the melting tube 1 at the same time, avoiding the presence of a gap between the clamping plate 3 and the pressure plate 4 or between the end face of the melting tube 1 and the pressure plate 4, and ensuring that the pressure plate 4 presses the clamping plate 3 tightly.

[0037] The utility model optimizes the structure of the fuse. The optimized fuse is additionally provided with a clamping plate 3 and a pressing plate 4. The melt 2 is tensioned and fixed in the accommodating cavity 11 by means of the two clamping plates 3. The clamping plates 3 are pressed and fixed to the two ends of the melting tube 1 by means of the pressing plate 4. The melt 2 can be assembled in the melting tube 1. The fixing method of the melt 2 is changed from the original butt welding to crimping. During assembly, there is no need to use a butt welding machine for butt welding, equipment investment is reduced, assembly time is shorter, assembly steps are simple, the entire assembly process is time-saving and labor-saving, and production cost is low.

[0038] The melt 2 of the present invention is preferably arranged in a stacked manner. The melt 2 includes a plurality of stacked fuses 21. These can be made of a low-melting-point material such as lead, a lead-tin alloy, or zinc, or a metal with a higher melting point such as silver or copper. The specific melting point can be determined based on the magnitude of the current flowing through the melt 2. The melt 2 is a thin metal sheet capable of withstanding a relatively high current. Of course, the fuses 21 can also be in the form of wires or grids, which are not specifically limited herein.

[0039] In the first embodiment, the ends of each fuse 21 are provided with cooperating hooks 211 and holes 31 between the clamping plates 3, allowing each fuse 21 to be hooked and hooked between the two clamping plates 3. This provides a simple structure and easy assembly. As a preferred embodiment, each fuse 21 is folded over at both ends to form hooks 211. The hooks 211 are each L-shaped. The clamping plates 3 are provided with a plurality of elongated holes 31. The hooks 211 cooperate with the holes 31 to securely connect the fuse 21 between the two clamping plates 3. The hooks 211 extend entirely within the opening 12. It is important to note that the ends of the fuse 21 are bent to form the hooks 211 only after they have passed through the holes 31. The hooks 211 abut against the edges of the holes 31, preventing the fuse 21 from detaching from the clamping plates 3 and preventing the holes 31 from being too wide, which could result in a loose hold on the fuse 21. Of course, the fuse 21 can also be fixed between the two clamping plates 3 by providing the clamping holes 31 at both ends of the fuse 21 and providing the clamping hook 211 on the side of the clamping plate 3 facing the fuse 21 .

[0040] Furthermore, the distance between the two latching holes 31 is greater than the width of the latching hooks 211, preventing interference between the latching hooks 211 on adjacent fuses 21. The number of latching holes 31 provided on the latch plate 3 is greater than the number of fuses 21, allowing for the flexible adjustment of the placement of the fuses 21 on the latch plate 3. This allows the latch plate 3 to accommodate fuses 21 of varying thicknesses while also flexibly adjusting the spacing between adjacent fuses 21, thus increasing its adaptability to a wider range of scenarios and providing improved versatility. In a first embodiment, the latching holes 31 on the latch plate 3 are evenly spaced, with one latching hole 31 separating two adjacent layers of fuses 21.

[0041] All fuses 21 include upper and lower fuses symmetrically distributed vertically. Lower hooks that fold vertically downward are provided at both ends of the upper fuses, while upper hooks that fold vertically upward are provided at both ends of the lower fuses. This prevents the hooks 211 provided on the uppermost and lowermost fuses 21 from interfering with the melt tube 1, and also prevents interference between the hooks 211 of fuses 21 in adjacent layers. In the first embodiment, considering that the cross-sectional shape of the accommodating cavity 11 is not a regular rectangle, i.e., the cross-sectional width of the accommodating cavity 11 is not uniform, the widths of all upper and lower fuses gradually increase in the direction of the horizontal symmetry plane near the accommodating cavity 11. That is, the widths of all upper fuses gradually increase from top to bottom, and the widths of all lower fuses gradually increase from bottom to top.

[0042] Each fuse 21 includes several fuse sections 212, all of which are linearly distributed along the axial direction of the accommodating cavity 11. The fuse plate is plate-shaped, and each fuse section 212 is formed with a plurality of linearly arranged through-holes 213. This allows the fuse sections 212 to utilize the local resistance concentration effect. When the current exceeds a specified value, the area between two adjacent through-holes 213 becomes a narrow portion of the fuse section 212. This portion has a small conductive area and a high resistance, causing each fuse section 212 to fuse first at the through-hole 213. This results in the entire fuse 21 fusing into multiple segments, simultaneously forming several short, easily extinguished arcs at the narrow fusing points of the fuse 21. The number of narrow segments in each fuse section 21 is related to the fuse's withstand voltage; generally, each narrow segment can withstand a voltage of 200-250V.

[0043] The through hole 213 may be formed by a stamping process. By controlling the variable cross-sectional dimensions, shape, and size of the through hole 213 , the characteristics of the fuse 21 may be adjusted, making the fuse suitable for various circuit protections.

[0044] Any two adjacent fuse parts 212 are integrally connected by an elastic part 214. The fuse 21 is stretched and retracted along the axial direction of the accommodating cavity 11 by the elastic part 214, so that the fuse 21 is stretched and retracted between the two card plates 3, thereby preventing the adjacent fuses 21 from collapsing and contacting and affecting the melting, thereby improving the reliability of the fuse; the setting of the elastic part 214 allows the fuse 21 to compensate for the spacing error between the two card plates 3 by stretching and retracting between the two card plates 3, thereby reducing the defect rate. As a preferred embodiment, the elastic part 214 is preferably a V-shaped protrusion, and the elastic parts 214 of all fuses 21 are opposite to each other. The openings of the V-shaped protrusions of all upper fuses are upward, and the openings of the V-shaped protrusions of all lower fuses are downward. Of course, the structure of the elastic part 214 is not limited to this, and can also be a circular arc protrusion or a W-shaped protrusion, etc. The expansion length of different types of elastic parts 214 is different and can be selected according to design requirements.

[0045] Compared with the first specific embodiment, the key of the second specific embodiment is to change the detachable connection method between the fuse 21 and the clamping plate 3, and the rest of the technical solutions are the same as those of the first specific embodiment.

[0046] In the second specific embodiment, T-shaped teeth are extended from both ends of each fuse 21, and a connecting plate is fixed on the side of the two card plates 3 facing the fuse 21. The connecting plate is provided with a U-shaped groove. The protrusions of the T-shaped teeth are respectively against the groove edges of the U-shaped groove, so that the fuse 21 is tensioned between the two card plates 3. The fuse 21 is easy to disassemble and assemble, and the purpose of the utility model can be achieved. The T-shaped teeth can be formed by stamping or replaced by L-shaped teeth. The connecting plate can be fixed to the card plate 3 by welding. The connecting plate can be a U-shaped plate or an L-shaped plate. However, no matter what structure the connecting plate has, it is necessary to ensure that the connecting plate has a clamping portion parallel to the card plate 3, and the U-shaped grooves are distributed on the clamping portion. Of course, the detachable connection method between the fuse 21 and the card plate 3 is not limited to the above two specific embodiments, and other similar schemes can also be used instead.

[0047] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0048] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A fuse, characterized in that: include: A melting tube (1), wherein a receiving cavity (11) is provided at the center of the melting tube (1), and openings (12) are formed at both ends of the melting tube (1) and are communicated with the receiving cavity (11); A melt (2), wherein both ends of the melt (2) are detachably connected to clamping plates (3), each of the clamping plates (3) abuts against a limiting protrusion (121) provided on the opening (12), and the melt (2) is tensioned and fixed in the accommodating cavity (11) through the clamping plates (3); A pressure plate (4), the pressure plate (4) is detachably fixed to the end of the melting tube (1), the pressure plate (4) abuts against the clamping plate (3), and the pressure plate (4) is used to press and fix the clamping plate (3) to the end of the melting tube (1).

2. The fuse according to claim 1, wherein: The melt (2) comprises a plurality of stacked melt sheets (21), and mutually matching hooks (211) and holes (31) are provided between the two ends of each melt sheet (21) and the clamping plate (3).

3. The fuse according to claim 2, characterized in that Both ends of each of the fusion sheets (21) are folded to form hooks (211), and the hooks (211) are matched with the clamping holes (31) provided on the clamping plate (3).

4. The fuse according to claim 3, characterized in that All the fuses (21) include an upper fuse and a lower fuse that are symmetrically distributed up and down, and both ends of the upper fuse are provided with lower hooks that are folded vertically downward, and both ends of the lower fuse are provided with upper hooks that are folded vertically upward.

5. The fuse according to claim 2, characterized in that Both ends of each fuse (21) are extended to form T-shaped teeth, and a connecting plate is fixedly provided on one side of the clamping plate (3) facing the fuse (21), and the connecting plate is provided with a U-shaped groove, and the T-shaped teeth cooperate with the U-shaped groove.

6. The fuse according to claim 2, characterized in that Each of the fuses (21) comprises a plurality of fuse parts (212), each of the fuse parts (212) being formed with a plurality of through holes (213) arranged in a linear manner; any two adjacent fuse parts (212) are integrally connected via an elastic part (214), and the fuse (21) is extended and retracted along the axial direction of the accommodating cavity (11) via the elastic part (214).

7. The fuse according to claim 6, characterized in that The elastic portion (214) is a V-shaped protrusion, an arc protrusion, or a W-shaped protrusion.

8. The fuse according to any one of claims 1 to 6, characterized in that: The limiting protrusion (121) is an annular protrusion or a radial lug formed on the inner side wall of the opening (12).

9. The fuse according to any one of claims 1 to 6, characterized in that: The end faces of the clamping plate (3) and the melting tube (1) are flush.

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