Multifunctional power fuse convenient to install

Abstract

The invention belongs to the technical field of electric power fuses, and particularly relates to a convenient-to-install multifunctional electric power fuse which comprises a base, a detachable shell is installed at the top of the base, an installation frame is installed at the top of the base, a supporting seat is installed at the center of the top of the installation frame, and a fuse link is placed at the top of the supporting seat. The positions of the mounting racks can be flexibly adjusted through the design of the adjusting pieces, the distance between the mounting racks can be easily adjusted by moving the positions of the moving blocks at the bottoms of the mounting racks on the limiting strips and fixing the moving blocks through the short bolts, and therefore the fuse link mounting device adapts to mounting of fuse links of different lengths. Meanwhile, the pressing part moves downwards after the shell is placed on the top of the base, the power connection piece is extruded towards the fuse link, and the fuse links with different widths are fixed. By means of the design that the length and the width are adjustable, the universality of the fuse is greatly improved, the situation that the fuse needs to be replaced due to the fact that the specifications of the fuse pieces are not matched is reduced, and the use cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of power fuse technology, and in particular to a multifunctional power fuse that is easy to install. Background Technology

[0002] In power systems, power fuses are widely used as important protective components for overload and short-circuit protection. When an abnormal current occurs in a circuit, the fuse element inside the fuse melts quickly, thus cutting off the circuit and preventing damage to electrical equipment due to overcurrent, ensuring the safe and stable operation of the power system. However, with the continuous development of power systems and the diversification of electrical equipment, traditional power fuses have gradually revealed a series of problems in practical applications, making it difficult to meet the needs of modern power systems.

[0003] Most electrical fuses on the market today have a fixed structure, and their installation dimensions and fuse element specifications have a narrow range of compatibility. In power systems, different electrical equipment and circuits have varying requirements for the length and width of fuse elements. For example, some large industrial equipment may require longer and wider fuse elements to withstand larger currents, while small electronic devices may only require shorter and narrower fuse elements. However, traditional electrical fuses often only accommodate specific fuse element specifications. When a different fuse element needs to be replaced, the entire fuse often needs to be replaced, which not only increases operating costs but also wastes resources. Moreover, in some complex power systems, it may be necessary to frequently replace fuse elements of different specifications according to different circuit protection requirements. The limitations of traditional fuses cause significant inconvenience in practical use.

[0004] Traditional power fuses suffer from inadequate structural design, resulting in poor structural stability during use. Firstly, the base materials of some fuses have poor insulation and high-temperature resistance, making them prone to leakage or base damage during prolonged use or when high temperatures arise from circuit faults. This seriously threatens operator safety and the normal operation of the power system. Secondly, the installation method between the fuse housing and base is not secure enough. Under vibration or external impact, the housing can easily loosen or shift, exposing the internal fuse element and increasing the risk of electric shock. Furthermore, during fuse installation, the lack of effective limiting devices allows the fuse element to easily pop out due to uneven force, potentially damaging surrounding equipment and injuring operators.

[0005] The unreasonable design of the conductive and clamping structures of traditional power fuses affects their reliability and service life. Regarding conductivity, the contact method between the conductive components of some fuses is not ideal, resulting in high contact resistance. This generates excessive heat when current flows, wasting energy and potentially damaging the conductive components due to overheating, thus affecting the normal operation of the fuse. Regarding clamping, traditional fuses use a simple clamping method for the fuse element, lacking effective buffering and reset mechanisms. When the fuse element is subjected to external force or melts due to current, the clamping components are easily damaged, leading to unstable clamping force and affecting the fuse's protective performance. Furthermore, frequent installation and removal cause wear on the clamping components, further reducing the fuse's lifespan. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a conveniently installed multifunctional power fuse, which more accurately solves the problems mentioned in the background section.

[0007] This invention is achieved through the following technical solution: This invention proposes a conveniently installed multifunctional power fuse, comprising a base, a detachable housing mounted on the top of the base, a mounting bracket mounted on the top of the base, a support base mounted at the center of the top of the mounting bracket, a fuse element placed on the top of the support base, movable contact pieces symmetrically arranged on the mounting bracket, the contact pieces located on both sides of the support base for clamping the fuse element, a pressing part mounted on the bottom of the housing, the pressing part being used to contact and energize the contact pieces when the housing is placed on top of the base, the pressing part being used to press the contact pieces towards the fuse element when moving downwards, for fixing fuse elements of different widths, a contact plate mounted on the top of the base, the contact plate being located at the bottom of the contact pieces and in contact with the contact pieces, for conducting electricity to the contact pieces, and an adjusting component mounted on the top of the base, the adjusting component being used to adjust the position of the mounting bracket for adjusting fuse elements of different lengths.

[0008] Preferably, a limiting piece is installed on the top of the contact piece, which is used to limit the top of the fuse piece to prevent the fuse piece from popping out due to force during the clamping of the contact piece.

[0009] Preferably, a conductive block is installed on the side of the contact plate, and the pressing part includes a damper installed on the top wall of the housing. A conductive plate is installed at the bottom of the damper. The bottom of the conductive plate and the top of the conductive block are both set as arc surfaces and contact each other at the arc surfaces. This is used to squeeze and push the conductive block when the conductive plate moves downward, and to clamp the conductive block with the fuse.

[0010] Preferably, a fixing plate is installed at the bottom of the mounting bracket, and a return spring is installed on the side of the fixing plate. The end of the return spring is connected to the side of the contact plate for resetting the contact plate. A sliding groove is opened at the top of the mounting bracket. The contact plate passes through the sliding groove and contacts the top of the contact plate. The damping force of the damper is greater than the elastic force of the return spring. The damper will only retract when the conductive block cannot move when the conductive plate squeezes the conductive block, thereby reducing the relative distance between the conductive plate and the inner top wall of the housing.

[0011] Preferably, the adjusting member includes a mounting plate installed on the top of the base, with limit strips symmetrically installed on the sides of the mounting plate, and a movable block installed at the bottom of the mounting frame. The movable block is sleeved on the surface of the limit strip and its position at the limit strip is adjustable.

[0012] Preferably, the surface of the limiting strip is provided with a plurality of limiting holes, the surface of the movable block is fitted with a nut, and a short bolt is threadedly connected to the inner wall of the nut, the short bolt passing through the limiting hole.

[0013] Preferably, metal springs are symmetrically installed on the front and back surfaces of the base, and a locking head is installed on one side of the metal springs. The front and back surfaces of the housing are symmetrically provided with locking holes, and the locking head is inserted into the locking hole for limiting the housing after it is placed on top of the base.

[0014] Preferably, a limiting post is installed at the top of the base, and a limiting cylinder is installed on the inner bottom wall of the housing. The limiting post is inserted into the limiting cylinder when the housing moves downward to position the housing.

[0015] Preferably, the top of the base is provided with an installation groove for placing and positioning the electrode plate, the bottom of the electrode plate is provided with an insulating sheet, the surface of the base is provided with a limiting groove, the insulating sheet is placed in the limiting groove, and the side of the base is provided with a long bolt, which passes through the insulating sheet and is inserted into the limiting groove and threadedly connected to the limiting groove.

[0016] Compared with the prior art, the present invention provides a conveniently installed multifunctional power fuse with the following advantages: This easy-to-install, multi-functional power fuse features an adjustable mounting bracket. By moving the sliding block at the bottom of the bracket against the limit strip and securing it with short bolts, the distance between mounting brackets can be easily adjusted to accommodate fuses of different lengths. Simultaneously, the downward pressing part moves downwards after the housing is placed on top of the base, pressing the contact piece against the fuse, thus securing fuses of different widths. This adjustable length and width design significantly improves the fuse's versatility, reduces the need for fuse replacements due to incompatible fuse specifications, and lowers operating costs.

[0017] This easy-to-install multi-functional power fuse features a base made of insulating, high-temperature-resistant material, eliminating the risk of leakage and damage due to high temperatures. The metal mounting bracket ensures structural strength and provides stable support for other components. An L-shaped limiting piece welded to the top of the connecting piece limits the top of the fuse when it is clamped, preventing it from popping out under pressure and effectively avoiding safety hazards during installation and use. Furthermore, the limiting post on the base engages with the limiting cylinder on the housing, and the clip on the metal spring engages with the locking hole on the housing, ensuring accurate and secure installation of the housing on the base, preventing displacement or loosening, and further improving structural stability.

[0018] This conveniently installed multi-functional power fuse, through its ingenious design and component coordination, ensures reliable performance and long service life. The conductive block welded to the side of the contact piece contacts the conductive plate in the lower pressing section via an arc-shaped contact and pressing mechanism, ensuring both good conductivity and reliable clamping of the fuse element. A return spring mounted on the side of the fixing plate at the bottom of the mounting bracket can reset the contact piece after it has been compressed and moved, facilitating fuse replacement. Simultaneously, the damping force of the damper is greater than the elastic force of the return spring. When the conductive plate compresses the conductive block and the fuse element is clamped and cannot move, the damper will retract, reducing the distance between the conductive plate and the inner top wall of the housing, preventing damage to components due to excessive pressure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a conveniently installed multifunctional power fuse proposed in this invention; Figure 2 This is a schematic diagram of the structure of a conveniently installed multifunctional power fuse adjustment component proposed in this invention; Figure 3 This is a schematic diagram of the structure of a convenient and multifunctional power fuse mounting bracket proposed in this invention; Figure 4 This is a front sectional view of the structure of a conveniently installed multifunctional power fuse proposed in this invention; Figure 5This is a side sectional view of the structure of a conveniently installed multifunctional electric fuse proposed in this invention; Figure 6 This is a schematic diagram of the structure of a conveniently installed multifunctional power fuse base proposed in this invention; Figure 7 This is a schematic diagram of the structure of a conveniently installed multifunctional power fuse housing proposed in this invention; Figure 8 This invention proposes a convenient and multifunctional power fuse. Figure 3 Enlarged schematic diagram of area A in the middle.

[0020] In the diagram: 1. Base; 11. Metal spring; 12. Clip; 13. Mounting slot; 14. Limiting slot; 15. Long bolt; 16. Limiting post; 2. Housing; 21. Clip hole; 22. Limiting cylinder; 3. Mounting bracket; 31. Fixing plate; 32. Return spring; 4. Support base; 5. Electrical contact plate; 51. Limiting plate; 52. Conductive block; 6. Pressing part; 61. Damper; 62. Conductive plate; 7. Electrical contact plate; 8. Adjusting component; 81. Mounting plate; 82. Limiting strip; 821. Limiting hole; 83. Moving block; 831. Nut; 832. Short bolt. Detailed Implementation

[0021] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings. Example

[0022] like Figures 1-8As shown in the figure, an embodiment of the present invention provides a conveniently installed multifunctional power fuse, including a base 1. The base 1 is made of insulating and high-temperature resistant material to ensure safety and stability during use. A detachable housing 2 is bolted to the top of the base 1. The housing 2 is made of transparent plastic, allowing easy observation of the internal fuse state. A mounting bracket 3, made of metal, is also bolted to the top of the base 1 to ensure structural strength. A support base 4, made of ceramic, is welded to the center of the top of the mounting bracket 3. The support base 4 has good insulation and high-temperature resistance, and the fuse rests stably on the top of the support base 4. Movable contact pieces 5, made of copper, are symmetrically arranged at the mounting bracket 3 to clamp the fuse. The bottom of the housing 2 is bolted to a pressing part 6, made of metal. When the housing 2 is placed on top of the base 1, the pressing part 6 can contact the contact pieces 5 and conduct electricity. As the pressing part 6 moves downward, it presses the contact piece 5 against the fuse piece, thereby fixing fuse pieces of different widths. A contact plate 7, made of copper, is bolted to the top of the base 1 and is located at the bottom of the contact piece 5, contacting it for conduction. An adjusting component 8 is also installed on the top of the base 1, used to adjust the position of the mounting bracket 3, thus allowing adjustment of fuse pieces of different lengths. This power fuse, through the above structure, can achieve the installation and fixing of fuse pieces of different widths and lengths, and its stable structure ensures normal power supply.

[0023] In this invention, a limiting piece 51, made of metal and L-shaped, is welded to the top of the contact piece 5. When the contact piece 5 clamps the fuse, the limiting piece 51 limits the top of the fuse, preventing it from popping out due to force during clamping. This effectively avoids the fuse from popping out during installation and use, improving installation stability and safety.

[0024] In this invention, a conductive block 52, made of copper, is welded to the side of the contact plate 5. The pressing part 6 includes a damper 61 installed on the top wall of the housing 2. The damper 61 is a hydraulic damper, and a conductive plate 62, also made of copper, is bolted to its bottom. Both the bottom of the conductive plate 62 and the top of the conductive block 52 are curved surfaces. When the housing 2 is placed on top of the base 1, the conductive plate 62 moves downward, and its curved surface contacts the curved surface of the conductive block 52, pressing and pushing the conductive block 52 to clamp it with the fuse, thus achieving conductivity. The curved surface contact and pressing method ensure both good conductivity and reliable clamping of the fuse.

[0025] In this invention, a fixing plate 31, made of metal, is welded to the bottom of the mounting bracket 3. A return spring 32, made of stainless steel, is installed on the side of the fixing plate 31, and its end is connected to the side of the contact piece 5. When the contact piece 5 is squeezed and moved, the return spring 32 can reset the contact piece 5. A sliding groove is provided on the top of the mounting bracket 3, and the contact piece 5 passes through the sliding groove and contacts the top of the contact plate 7. The damping force of the damper 61 is greater than the elastic force of the return spring 32. When the conductive plate 62 squeezes the conductive block 52, if the conductive block 52 cannot move because the fuse is clamped, the damper 61 will retract, reducing the relative distance between the conductive plate 62 and the inner top wall of the housing 2, thus avoiding damage to the components due to excessive pressure. The return spring allows the contact piece to automatically reset when no force is applied. The cooperation between the damper and the return spring ensures that the components will not be damaged due to excessive pressure during the clamping of the fuse, improving the reliability and service life of the equipment.

[0026] In this invention, the adjusting component 8 includes a mounting plate 81 installed on the top of the base 1. The mounting plate 81 is made of metal and is fixed to the base 1 by bolts. Limiting strips 82, also made of metal and elongated in shape, are symmetrically installed on the sides of the mounting plate 81. A movable block 83 is welded to the bottom of the mounting frame 3. The movable block 83 has holes that fit the limiting strips 82. The movable block 83 fits onto the surface of the limiting strips 82, and its position at the limiting strips 82 is adjustable. Moving the movable block 83 moves the mounting frame 3, thereby adjusting its position. By moving the movable block on the limiting strips, the position of the mounting frame can be easily adjusted to accommodate the installation requirements of fuses of different lengths.

[0027] In this invention, the surface of the limiting strip 82 is provided with a plurality of limiting holes 821, which are circular. A nut 831 is welded to the surface of the movable block 83, and a short bolt 832, made of metal, is threaded onto the inner wall of the nut 831. When the movable block 83 moves to the appropriate position, the short bolt 832 is inserted into the corresponding limiting hole 821, and tightening the short bolt 832 fixes the movable block 83 onto the limiting strip 82, thereby fixing the position of the mounting bracket 3. The cooperation between the short bolt and the limiting hole precisely fixes the position of the movable block, thus ensuring the stability of the mounting bracket position and ensuring the secure installation of the fuse.

[0028] In this invention, metal springs 11 are symmetrically installed on both the front and back surfaces of the base 1. The metal springs 11 are made of spring steel and possess a certain degree of elasticity. A locking head 12, made of plastic and conical in shape, is welded to one side of the housing 2 via the metal springs 11. Locking holes 21 are symmetrically formed on both the front and back surfaces of the housing 2, and the shape of the locking holes 21 is adapted to the locking head 12. When the housing 2 is placed on top of the base 1, the elasticity of the metal springs 11 causes the locking head 12 to engage with the locking hole 21, thus limiting the housing 2 after it is placed on top of the base 1. Through the engagement of the locking head and the locking hole, the housing can be quickly and securely fixed to the base, facilitating installation and disassembly.

[0029] In this invention, a limiting post 16, made of metal and cylindrical, is welded to the top of the base 1. A limiting cylinder 22, also made of metal, is welded to the inner bottom wall of the housing 2, and its inner diameter matches the outer diameter of the limiting post 16. When the housing 2 moves downwards, the limiting post 16 inserts into the limiting cylinder 22, positioning the housing 2 and preventing it from shifting during installation. The cooperation between the limiting post and the limiting cylinder ensures accurate installation of the housing onto the base, improving installation precision and stability.

[0030] In this invention, the top of the base 1 has a mounting groove 13, the shape of which is adapted to the junction plate 7 for placement and positioning. An insulating sheet, made of rubber, is glued to the bottom of the junction plate 7, providing excellent insulation. A limiting groove 14 is formed on the surface of the base 1, within which the insulating sheet is placed for further fixation and insulation. A long bolt 15, made of metal, is provided on the side of the base 1. The bolt 15 penetrates the insulating sheet, inserts into the limiting groove 14, and is threaded into the groove, thus firmly fixing the junction plate 7 to the base 1. Through the cooperation of the mounting groove, insulating sheet, and long bolt, accurate installation and secure fixing of the junction plate can be achieved, while ensuring good insulation performance, thus improving the safety and stability of the equipment.

[0031] The workflow of this invention involves moving the movable block 83 at the bottom of the mounting bracket 3 according to the length of the fuse, allowing it to slide on the limiting strip 82. Once in the appropriate position, a short bolt 832 is passed through the nut 831 on the movable block 83 and screwed into the corresponding limiting hole 821 on the limiting strip 82, thereby fixing the position of the mounting bracket 3 to accommodate the installation requirements of fuses of different lengths. The junction plate 7 is placed in the mounting groove 13 at the top of the base 1 for initial positioning. The rubber insulating sheet at the bottom of the junction plate 7 is embedded in the limiting groove 14 on the surface of the base 1. Then, a long bolt 15 is inserted through the insulating sheet into the limiting groove 14 and threaded into the limiting groove 14, firmly fixing the junction plate 7 to the base 1 and ensuring good insulation performance. The fuse is then placed smoothly on top of the support base 4. The housing 2 is moved downwards, causing the limiting post 16 at the top of the base 1 to insert into the limiting cylinder 22 on the inner bottom wall of the housing 2, thus positioning the housing 2 and preventing installation misalignment. Simultaneously, the metal spring clips 11 on the front and back surfaces of the base 1 use elasticity to allow the clips 12 to engage with the clip holes 21 on the front and back surfaces of the housing 2, limiting the housing 2 and quickly and firmly fixing it to the base 1. The pressing part 6, bolted to the bottom of the housing 2, moves downward with the housing 2. The conductive plate 62 at the bottom of the damper 61 in the pressing part 6 moves downward, and the arc surface at the bottom of the conductive plate 62 contacts the arc surface at the top of the copper conductive block 52 welded to the side of the contact piece 5, squeezing and pushing the conductive block 52. Since the contact piece 5 passes through the groove at the top of the mounting bracket 3 and contacts the top of the contact plate 7, the conductive block 52 is squeezed and pushed, causing the contact piece 5 to move towards the fuse piece, thereby clamping fuse pieces of different widths. At the same time, the L-shaped metal limiting piece 51 welded to the top of the contact piece 5 limits the top of the fuse piece, preventing the fuse piece from popping out due to force during clamping. A stainless steel return spring 32 is mounted on the side of the fixing plate 31 welded to the bottom of the mounting bracket 3, and its end is connected to the side of the contact plate 5. When the fuse needs to be replaced or removed, and the contact plate 5 is no longer squeezed by the conductive plate 62, the return spring 32 can reset the contact plate 5. The damping force of the damper 61 is greater than the elastic force of the return spring 32. When the conductive plate 62 squeezes the conductive block 52, if the conductive block 52 cannot move because the fuse is clamped, the damper 61 will retract, reducing the distance between the conductive plate 62 and the inner top wall of the housing 2, avoiding damage to components due to excessive pressure, and improving the reliability and service life of the equipment. The contact piece 5 is made of copper and has good conductivity. The contact plate 7 is also made of copper and is in contact with the contact piece 5. The conductive plate 62 is made of copper and is in contact with the conductive block 52. The conductive block 52 is connected to the contact piece 5. This structure enables the current to be conducted, allowing the power fuse to work normally. When an overload or short circuit occurs in the circuit, the fuse melts, thereby cutting off the circuit and providing protection.

[0032] Finally, it should be noted that the basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification, and therefore remain within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe embodiments of this specification. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined. Moreover, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods of this specification.

[0033] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A conveniently installed multifunctional power fuse, comprising a base (1), characterized in that, A detachable housing (2) is mounted on the top of the base (1). A mounting bracket (3) is mounted on the top of the base (1). A support base (4) is mounted at the center of the top of the mounting bracket (3). A fuse is placed on the top of the support base (4). Movable contact pieces (5) are symmetrically arranged at the mounting bracket (3). The contact pieces (5) are located on both sides of the support base (4) and are used to clamp the fuse. A pressing part (6) is mounted on the bottom of the housing (2). The pressing part (6) is used to press the housing (2) when it is placed on the base (1). After the top, it contacts the contact piece (5) and is energized. When the pressing part (6) moves downward, it is used to squeeze the contact piece (5) towards the fuse piece and to fix fuse pieces of different widths. The top of the base (1) is equipped with a contact plate (7). The contact plate (7) is located at the bottom of the contact piece (5) and contacts the contact piece (5) to conduct electricity to the contact piece (5). The top of the base (1) is equipped with an adjusting member (8). The adjusting member (8) is used to adjust the position of the mounting bracket (3) and to adjust fuse pieces of different lengths.

2. The conveniently installed multifunctional power fuse according to claim 1, characterized in that, A limiting piece (51) is installed on the top of the contact piece (5). The limiting piece (51) is used to limit the top of the fuse piece to prevent the fuse piece from popping out due to force during the clamping of the contact piece (5).

3. The conveniently installed multifunctional power fuse according to claim 2, characterized in that, A conductive block (52) is installed on the side of the contact plate (5). The pressing part (6) includes a damper (61) installed on the top wall of the housing (2). A conductive plate (62) is installed at the bottom of the damper (61). The bottom of the conductive plate (62) and the top of the conductive block (52) are both set as arc surfaces and contact each other at the arc surfaces. This is used to squeeze and push the conductive block (52) when the conductive plate (62) moves downward, and to clamp the conductive block (52) with the fuse.

4. The conveniently installed multifunctional power fuse according to claim 3, characterized in that, The mounting bracket (3) has a fixing plate (31) installed at the bottom. A reset spring (32) is installed on the side of the fixing plate (31). The end of the reset spring (32) is connected to the side of the contact plate (5) for resetting the contact plate (5). The mounting bracket (3) has a sliding groove at the top. The contact plate (5) passes through the sliding groove and contacts the top of the contact plate (7). The damping force of the damper (61) is greater than the elastic force of the reset spring (32). When the conductive plate (62) squeezes the conductive block (52), the damper (61) will retract when the conductive block (52) cannot move, thereby reducing the relative distance between the conductive plate (62) and the inner top wall of the housing (2).

5. A conveniently installed multifunctional power fuse according to claim 1, characterized in that, The adjusting component (8) includes a mounting plate (81) mounted on the top of the base (1), with limit strips (82) symmetrically mounted on the side of the mounting plate (81), and a moving block (83) mounted on the bottom of the mounting bracket (3). The moving block (83) is sleeved on the surface of the limit strip (82) and its position at the limit strip (82) is adjustable.

6. A conveniently installed multifunctional power fuse according to claim 5, characterized in that, The surface of the limiting strip (82) is provided with a plurality of limiting holes (821), and the surface of the moving block (83) is provided with a nut (831). A short bolt (832) is threadedly connected to the inner wall of the nut (831), and the short bolt (832) penetrates into the limiting hole (821).

7. The conveniently installed multifunctional power fuse according to claim 1, characterized in that, Metal springs (11) are symmetrically installed on the front and back surfaces of the base (1). A clip (12) is installed on one side of the housing (2). A clip hole (21) is symmetrically opened on the front and back surfaces of the housing (2). The clip (12) is inserted into the clip hole (21) for limiting the housing (2) after it is placed on top of the base (1).

8. A conveniently installed multifunctional power fuse according to claim 7, characterized in that, A limiting post (16) is installed at the top of the base (1), and a limiting cylinder (22) is installed on the inner bottom wall of the housing (2). The limiting post (16) is inserted into the limiting cylinder (22) when the housing (2) moves downward, for positioning the housing (2).

9. A conveniently installed multifunctional power fuse according to claim 1, characterized in that, The base (1) has an installation groove (13) on its top. The installation groove (13) is used for placing and positioning the electrical plate (7). An insulating sheet is installed on the bottom of the electrical plate (7). A limiting groove (14) is opened on the surface of the base (1). The insulating sheet is placed in the limiting groove (14). A long bolt (15) is provided on the side of the base (1). The long bolt (15) passes through the insulating sheet and is inserted into the limiting groove (14) and threadedly connected to the limiting groove (14).

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