Current rapid fuse

Abstract

The utility model relates to the technical field of fuses, in particular to a current rapid fuse, which comprises a fixed box and a box door, one side of the fixed box is provided with the box door, the upper side and the lower side of the fixed box are provided with threading holes, the fixed box is internally provided with a fusing mechanism, the fusing mechanism is internally provided with an insulating block, one side of the insulating block is provided with a groove, and the groove is provided with a through hole. A groove is formed in the insulating block, movable sleeves are arranged on the two sides of the insulating block, spring rods are arranged on one sides of the movable sleeves, a connecting block is arranged in the groove, limiting holes are formed in the two sides of the connecting block, a supporting assembly is arranged at one end of the connecting block, a limiting sleeve is arranged on the supporting assembly, a vertical rod is arranged in the limiting sleeve, and a fusing assembly is arranged on the vertical rod. And a replacement mechanism is arranged in the fixing box, a fixing block is arranged in the replacement mechanism, a sliding groove plate is arranged on one side of the fixing block, and a sliding rod is arranged on the sliding groove plate.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, specifically a fast current fuse. Background Technology

[0002] A fuse, commonly known as a circuit breaker, is a simple and effective protective electrical appliance. In use, a fuse is connected in series in the protected circuit to provide short-circuit and severe overload protection for the circuit and electrical equipment. Its main function is short-circuit protection. The fuse element is connected in series with the protected circuit. When the circuit is operating normally, the fuse element allows a certain amount of current to pass through without melting. When a short circuit or severe overload occurs, a large fault current flows through the fuse element. When the heat generated by the current reaches the melting point of the fuse element, the fuse element melts and breaks the circuit, thus achieving the purpose of protection. A fast-acting fuse is a type of fuse mainly used for short-circuit protection of semiconductor rectifier elements or rectifier devices. Because semiconductor elements have very low overload capacity and can only withstand large overload currents for a very short time, short-circuit protection requires the ability to melt quickly.

[0003] In response, Chinese patent application number CN213424908U discloses a high-current fast-acting fuse, comprising a fusible element, with end caps installed at both ends of the fusible element. An insulating tube is connected to each end cap, and a terminal block with a through hole is located inside the insulating tube. A mounting plate is fixedly connected to the side wall of the end cap, and a support plate is fixedly connected to the upper end of the mounting plate. A movable hole is provided on the support plate, and a pull rod is slidably connected to the support plate through the movable hole. A pull plate is fixedly connected to the end of the pull rod away from the fusible element, and the other end of the pull rod passes through the movable hole and extends outward, with a fixed cover fixedly connected thereto. A pressure ring is fixedly connected to the inner side wall of the fixed cover. This invention facilitates wiring and disconnection at both ends of the fuse, makes fuse replacement easier, and ensures full contact between both ends of the fuse and the wire.

[0004] However, existing fast-acting fuses, after protecting the circuit by blowing, require separate replacement. Currently, existing fuses are fixed with screws, and tools are needed for disassembly and replacement to improve the practicality of the device.

[0005] Therefore, in order to solve the above problems, a fast-acting current fuse is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a fast-acting fuse to solve the problem mentioned in the background art that, after the fast-acting fuse protects the circuit by blowing, it is necessary to replace the fuse separately. Currently, existing fuses are fixed with screws, and tools are required for disassembly and replacement, thus improving the practicality of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fast-acting fuse, comprising: a fixed box and a door, the fixed box having a door on one side and wire-passing holes on the upper and lower sides of the fixed box, a fuse mechanism inside the fixed box, an insulating block inside the fuse mechanism, a groove on one side of the insulating block, and movable sleeves on both sides of the insulating block, a spring rod on one side of the movable sleeve, and a connecting block inside the groove, limit holes on both sides of the connecting block, and a support assembly at one end of the connecting block, a limit sleeve on the support assembly, a vertical rod inside the limit sleeve, a fuse assembly on the vertical rod, and a replacement mechanism inside the fixed box, a fixed block inside the replacement mechanism, a sliding plate on one side of the fixed block, and a sliding rod on the sliding plate.

[0008] Preferably, a first fixing sleeve is fixedly installed on the upper end of the slide rod, and a first connecting rod is provided on both sides of the first fixing sleeve, with a first retaining sleeve movably installed at one end of the first connecting rod.

[0009] Preferably, a second fixing sleeve is fixedly installed at the lower end of the slide rod, and a second connecting rod is fixedly installed on both sides of the second fixing sleeve, with a second retaining sleeve movably installed at one end of the second connecting rod.

[0010] Preferably, a third fixing sleeve is fixedly installed in the middle of the slide rod, and crossbars are fixedly installed on both sides of the third fixing sleeve. A turntable is provided on one side of the crossbar, and a threaded rod is rotatably installed on one side of the turntable. A threaded sleeve is provided at one end of the threaded rod, and the threaded sleeve is fixedly installed in the fixing box. One end of the threaded rod passes through the crossbar and is rotatably installed in the threaded sleeve.

[0011] Preferably, the insulating block is fixedly installed inside the fixed box, the movable sleeve is movably installed on both sides of the insulating block, one end of the spring rod is fixedly installed on the movable sleeve, and the other end of the spring rod is movably installed in the groove, and the connecting block is movably installed in the groove through the limiting hole.

[0012] Preferably, the support assembly is fixedly mounted on the connecting block, the limiting sleeve is movably mounted on the support assembly, the vertical rod is movably mounted inside the limiting sleeve, and the fusion assembly is fixedly mounted on the vertical rod.

[0013] Preferably, the fixing block is fixedly installed inside the fixing box, the sliding plate is fixedly installed on the fixing block, and the sliding rod is slidably installed inside the sliding plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Equipped with a fuse mechanism, this mechanism can protect against short circuits in the wires. The insulating block inside the mechanism provides insulation for the entire system. The movable sleeve drives the spring rod to limit and fix the connecting block. The circuit is connected through the support assembly. The vertical rod is limited and fixed through the limiting sleeve. In this process, the vertical rod can be supported and fixed through the limiting sleeve, thereby improving the working efficiency of the device.

[0016] 2. A replacement mechanism is provided, which allows for the replacement of the fusible assembly. A turntable within the mechanism drives a threaded rod to rotate, which in turn moves a horizontal bar, which in turn moves a sliding rod. This process is limited by a sliding groove plate. A first fixed sleeve then moves a first connecting rod, which in turn moves a first retaining sleeve. The sliding rod then moves a second fixed sleeve, which in turn moves a second connecting rod. Finally, the second connecting rod moves a second retaining sleeve, and through the cooperation of the first and second retaining sleeves, the vertical rod pushes out the fusible assembly for replacement, thus improving the device's practicality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0018] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a front view schematic diagram of the main structure of the present utility model;

[0020] Figure 3 This is a front sectional view of the structure of the fuse mechanism of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the replacement mechanism of this utility model.

[0022] In the diagram: 1. Fixed box; 2. Box door; 3. Wire hole; 4. Fusible link mechanism; 41. Insulating block; 42. Groove; 43. Movable sleeve; 44. Spring rod; 45. Connecting block; 46. Limiting hole; 47. Support assembly; 48. Limiting sleeve; 49. Vertical rod; 410. Fusible link assembly; 5. Replacement mechanism; 51. Fixed block; 52. Slide plate; 53. Slide rod; 54. First fixed sleeve; 55. First connecting rod; 56. First clamping sleeve; 57. Second fixed sleeve; 58. Second connecting rod; 59. Second clamping sleeve; 510. Third fixed sleeve; 511. Horizontal bar; 512. Turntable; 513. Threaded rod; 514. Threaded sleeve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 One embodiment provided by this utility model:

[0025] A fast-acting fuse includes: a fixed box 1 and a door 2. The fixed box 1 has a door 2 on one side and wire holes 3 on the upper and lower sides. The fixed box 1 has a fuse mechanism 4 inside. The fuse mechanism 4 has an insulating block 41 inside. The insulating block 41 has a groove 42 on one side and movable sleeves 43 on both sides. The movable sleeves 43 have a spring rod 44 on one side and a connecting block 45 inside the groove 42. The connecting block 45 has limit holes 46 on both sides and a support assembly 47 at one end. The support assembly 47 has a limit sleeve 48. The limit sleeve 48 has a vertical rod 49 inside and a fuse assembly 410 on the vertical rod 49. The fixed box 1 also has a replacement mechanism 5 inside. The replacement mechanism 5 has a fixed block 51 inside and a sliding plate 52 on one side. The sliding plate 52 has a sliding rod 53. By setting this component, the power line can be protected by the fuse mechanism 4, and the fuse assembly 410 can be replaced by the replacement mechanism 5.

[0026] As a further improvement of this utility model, a first fixing sleeve 54 is fixedly installed on the upper end of the slide rod 53. A first connecting rod 55 is provided on both sides of the first fixing sleeve 54. A first retaining sleeve 56 is movably installed on one end of the first connecting rod 55. By setting this component, the slide rod 53 can drive the first connecting rod 55 to move through the first fixing sleeve 54, and then drive the first retaining sleeve 56 to move through the first connecting rod 55.

[0027] As a further improvement of this utility model, a second fixing sleeve 57 is fixedly installed at the lower end of the slide rod 53, and a second connecting rod 58 is fixedly installed on both sides of the second fixing sleeve 57. A second retaining sleeve 59 is movably installed at one end of the second connecting rod 58. By setting this component, the slide rod 53 can drive the second connecting rod 58 to move through the second fixing sleeve 57, and then drive the second retaining sleeve 59 to move through the second connecting rod 58.

[0028] As a further improvement of this utility model, a third fixing sleeve 510 is fixedly installed in the middle of the slide rod 53, and a crossbar 511 is fixedly installed on both sides of the third fixing sleeve 510. A turntable 512 is provided on one side of the crossbar 511, and a threaded rod 513 is rotatably installed on one side of the turntable 512. A threaded sleeve 514 is provided at one end of the threaded rod 513. The threaded sleeve 514 is fixedly installed in the fixing box 1, and one end of the threaded rod 513 passes through the crossbar 511 and is rotatably installed in the threaded sleeve 514. By setting this component, the slide rod 53 can limit and fix the third fixing sleeve 510.

[0029] As a further improvement of this utility model, the insulating block 41 is fixedly installed inside the fixed box 1, the movable sleeve 43 is movably installed on both sides of the insulating block 41, one end of the spring rod 44 is fixedly installed on the movable sleeve 43, and the other end of the spring rod 44 is movably installed in the groove 42, and the connecting block 45 is movably installed in the groove 42 through the limiting hole 46. By setting this component, the insulating block 41 can provide insulation protection for the device.

[0030] As a further improvement of this utility model, the support component 47 is fixedly installed on the connecting block 45, the limiting sleeve 48 is movably installed on the support component 47, the vertical rod 49 is movably installed inside the limiting sleeve 48, and the fusion component 410 is fixedly installed on the vertical rod 49. By setting this component, the connecting line can be fixed by the support component 47, and the vertical rod 49 can be limited and fixed by the limiting sleeve 48.

[0031] As a further improvement of this utility model, the fixing block 51 is fixedly installed inside the fixing box 1, the sliding plate 52 is fixedly installed on the fixing block 51, and the sliding rod 53 is slidably installed inside the sliding plate 52. By setting this component, the sliding plate 52 can be limited and fixed by the fixing block 51.

[0032] Working principle: When a fast-acting fuse is needed, simply connect the power cord to the support assembly 47 through the wiring hole 3 on the fixed box 1. The insulating block 41 in the fuse mechanism 4 then insulates the entire assembly. The movable sleeve 43 drives the spring rod 44 to limit and fix the connecting block 45. The support assembly 47 connects the circuit, and the limiting sleeve 48 limits and fixes the vertical rod 49. This process allows the fuse assembly 410 to be supported and fixed by the vertical rod 49, thus enabling operation. When the fuse assembly 410 needs to be replaced, simply rotate the threaded rod 513 through the turntable 512 in the replacement mechanism 5, which in turn drives the horizontal rod. 511 moves, which in turn drives the slide bar 53 to move via the crossbar 511. During this process, the slide bar 53 can be limited by the slide plate 52. The slide bar 53 drives the first connecting rod 55 to move via the first fixed sleeve 54, then drives the first clamp 56 to move via the first connecting rod 55, then drives the second fixed sleeve 57 to move via the slide bar 53, then drives the second connecting rod 58 to move via the second fixed sleeve 57, and finally drives the second clamp 59 to work via the second connecting rod 58. Thus, the first clamp 56 and the second clamp 59 cooperate to push out the vertical bar 49 and the fuse assembly 410, thereby completing the replacement work.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A current fast acting fuse comprising: The utility model provides a fixed box (1) and box door (2), one side of the fixed box (1) is equipped with box door (2), and is equipped with threading hole (3) in the upper and lower sides of fixed box (1), characterized by: the fixed box (1) is equipped with fusing mechanism (4), the fusing mechanism (4) is equipped with insulating block (41), one side of the insulating block (41) is equipped with recess (42), and both sides of insulating block (41) are equipped with movable sleeve (43) one side of the movable sleeve (43) is equipped with spring rod (44), and the recess (42) is equipped with connecting block (45), both sides of the connecting block (45) are equipped with limit hole (46), and one end of connecting block (45) is equipped with support assembly (47), the support assembly (47) is equipped with limit sleeve (48) on, the limit sleeve (48) is equipped with vertical rod (49) in, the vertical rod (49) is equipped with fusing assembly (410) on, and the fixed box (1) is equipped with replacement mechanism (5) in, the replacement mechanism (5) is equipped with fixed block (51) in, one side of the fixed block (51) is equipped with sliding slot plate (52), the sliding slot plate (52) is equipped with sliding rod (53).

2. A current fast acting fuse according to claim 1, characterized in that: The first fixed sleeve (54) is fixedly installed on the upper end of the sliding rod (53), the first fixed sleeve (54) is provided with a first connecting rod (55) on both sides, and the first connecting rod (55) is movably provided with a first clamping sleeve (56) at one end.

3. A current fast acting fuse according to claim 2, characterized in that: The second fixed sleeve (57) is fixedly installed on the lower end of the sliding rod (53), the second fixed sleeve (57) is fixedly provided with a second connecting rod (58) on both sides, and the second connecting rod (58) is movably provided with a second clamping sleeve (59) at one end.

4. A current fast acting fuse according to claim 3, characterized in that: The third fixed sleeve (510) is fixedly installed on the sliding rod (53), the third fixed sleeve (510) is fixedly provided with a horizontal rod (511) on both sides, the horizontal rod (511) is provided with a rotating disc (512) on one side, the rotating disc (512) is rotatably provided with a threaded rod (513) on one side, the threaded rod (513) is provided with a threaded sleeve (514) at one end, the threaded sleeve (514) is fixedly installed in the fixed box (1), and the threaded rod (513) is rotatably installed in the threaded sleeve (514) through the horizontal rod (511) at one end.

5. A current fast acting fuse according to claim 1, characterized in that: The insulating block (41) is fixedly installed in the fixed box (1), the movable sleeve (43) is movably installed on both sides of the insulating block (41), one end of the spring rod (44) is fixedly installed on the movable sleeve (43), and the other end of the spring rod (44) is movably installed in the recess (42), and the connecting block (45) is movably installed in the recess (42) through the limit hole (46).

6. A current fast acting fuse according to claim 1, characterized in that: The support assembly (47) is fixedly installed on the connecting block (45), the limit sleeve (48) is movably installed on the support assembly (47), the vertical rod (49) is movably installed in the limit sleeve (48), and the fusing assembly (410) is fixedly installed on the vertical rod (49).

7. A current fast acting fuse according to claim 1, characterized in that: The fixed block (51) is fixedly installed in the fixed box (1), the sliding slot plate (52) is fixedly installed on the fixed block (51), and the sliding rod (53) is slidably installed in the sliding slot plate (52).

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