Current rapid fuse

Abstract

The utility model relates to the technical field of fuses, in particular to a current rapid fuse. Comprising a fuse body, contact knives are arranged at the two ends of the top of the fuse body, transverse plates are fixedly installed at the top and the bottom of the fuse body, the fuse body is sleeved with two rectangular sheaths, the two transverse plates are slidably sleeved with the rectangular sheaths, two first sliding grooves are formed in the top of the transverse plate located on the upper portion, and two second sliding grooves are formed in the top of the transverse plate located on the lower portion. First sliding grooves are formed in the transverse plate, first sliding blocks are slidably installed in the first sliding grooves, the first sliding blocks are fixed to the inner walls of the corresponding rectangular protective sleeves, a rectangular through hole penetrates through the transverse plate located on the upper portion, the two first sliding blocks penetrate through the same two-way lead screw in a threaded mode, and the two-way lead screw is fixedly sleeved with a shifting wheel. Through the simple covering protection structure, the wiring terminal can be conveniently covered and protected, the wiring terminal can be effectively prevented from being exposed, the wiring terminal can be prevented from being covered with dust or being accidentally touched and loosened, and the problem of poor contact of the wiring terminal can be effectively avoided.

Description

Technical Field

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

[0002] A fuse is an electrical device used to protect circuits from overload and short circuit. It is usually made of a metal wire or other material. When the current exceeds the set rated value, it will melt and cut off the circuit to prevent the equipment in the circuit from being damaged or the risk of fire. Fuses are commonly used in household circuits, industrial equipment, and automotive electrical systems. With the continuous development of electrification, the market demand for fast-acting fuses is increasing. The current fuse mainly includes a fuse, an end and a contact knife, which has the advantages of being small and easy to install. The prior art discloses a high-current fast fuse with the authorization announcement number CN213424908U, including a fuse, both ends of the fuse are installed with end covers, the end covers are connected with an insulating tube, the insulating tube is provided with a terminal, the terminal is provided with a threading hole, the side wall of the end cover is fixedly connected with a mounting plate, the upper end of the mounting plate is fixedly connected with a support plate, the support plate is provided with a movable hole, the support plate is slidably connected with a pull rod through the movable hole, the end of the pull rod away from the fuse is fixedly connected with a pull plate, the other end of the pull rod passes through the movable hole and extends outward, and is fixedly connected with a fixed cover, and the inner wall of the fixed cover is fixedly connected with a pressure ring. The utility model is convenient for wiring and disconnecting at both ends of the fuse, is conducive to the replacement of the fuse, and can fully connect the two ends of the fuse with the wire.

[0003] However, it was found during use that the above design is not convenient for covering and protecting the wiring terminals, resulting in the contact blade being exposed after wiring. It is easy to be covered with dust or loosened by accidental touch during long-term use, which can easily lead to poor contact problems. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a current fast fuse, which is convenient for covering and protecting the terminal, can effectively prevent the terminal from being exposed to the outside, can prevent the terminal from being covered with dust or being loosened by accidental touch, can effectively avoid the problem of poor contact of the terminal, and solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a current fast fuse, comprising a fuse, wherein both ends of the top of the fuse are provided with contact knives, the top and bottom of the fuse are fixedly installed with horizontal plates, the fuse is sleeved with two rectangular sheaths, the rectangular sheaths are slidably sleeved on the two horizontal plates, the top of the upper horizontal plate is provided with two first sliding grooves, a first slider is slidably installed in the first sliding groove, the first slider is fixed on the inner wall of the corresponding rectangular sheath, a rectangular through hole is penetrated by the upper horizontal plate, the two first sliders are threaded with the same bidirectional screw rod, a dial wheel is fixedly sleeved on the bidirectional screw rod, the dial wheel is rotatably installed on the rectangular through hole, the top of the dial wheel extends outside the rectangular through hole, and the contact knife is located in the corresponding rectangular sheath.

[0006] To prevent the power knife clamp from detaching from the contact knife:

[0007] As a further improvement of the above technical solution: the rectangular sheath also includes two grooves, which are respectively opened on the top and bottom inner walls of the rectangular sheath, and two pressure plates are slidably installed in the rectangular sheath, and the pressure plates are slidably connected to the inner walls of the corresponding grooves. A threaded through hole is penetrated on the inner wall of one side of the groove, and a screw rod is penetrated by the thread in the threaded through hole, one end of the screw rod is rotatably connected to the corresponding pressure plate, and the pressure plate is adapted to the touch knife.

[0008] The beneficial effect of this improvement is that, through such an arrangement, the power connection knife clamp can be effectively prevented from being separated from the contact knife, thereby effectively ensuring the contact effect of the connection terminal.

[0009] In order to facilitate the positioning of the rectangular sheath:

[0010] As a further improvement of the above technical solution: two second sliding grooves are provided at the bottom of the horizontal plate located below, and second sliding blocks are slidably installed in the second sliding grooves, and the second sliding blocks are fixed on the inner wall of the corresponding rectangular sheath.

[0011] The beneficial effect of this improvement is that by providing the second sliding groove and the second sliding block, it is convenient to limit the rectangular sheath.

[0012] In order to facilitate the limiting of the second slider:

[0013] As a further improvement of the above technical solution: a limiting rod is fixedly installed in the second sliding groove, and the limiting rod slides through the corresponding second sliding block.

[0014] The beneficial effect of this improvement is that by providing a limiting rod, it is convenient to limit the second sliding block.

[0015] In order to facilitate the support and limit of the bidirectional screw:

[0016] As a further improvement of the above technical solution: a through hole is passed through the first sliding groove and the rectangular through hole, and the bidirectional screw rod rotates through the two through holes.

[0017] The beneficial effect of this improvement is that by providing a through hole, it is convenient to support and limit the bidirectional screw rod.

[0018] To prevent the pressure plate from slipping off the contact knife clamp:

[0019] As a further improvement of the above technical solution: an anti-skid pad is fixedly installed on one side of the pressure plate away from the corresponding groove, and the material of the anti-skid pad is rubber.

[0020] The beneficial effect of this improvement is that by providing an anti-skid pad, the pressure plate can be prevented from slipping off the power-connecting knife clamp of the contact knife.

[0021] In order to facilitate the rotation connection between the pressure plate and the screw rod:

[0022] As a further improvement of the above technical solution: a circular groove is formed at one end of the screw rod, a rotating rod is rotatably installed in the circular groove, and one end of the rotating rod is fixed on the corresponding pressure plate.

[0023] The beneficial effect of this improvement is that the circular groove and the rotating rod are provided, thereby facilitating the rotational connection between the pressing plate and the screw rod.

[0024] The beneficial effects of the utility model are as follows: through a simple covering and protection structure, it is convenient to cover and protect the wiring terminals, which can effectively prevent the wiring terminals from being exposed to the outside, thereby preventing the wiring terminals from being covered with dust or being loosened by accidental touch, thereby effectively avoiding the problem of poor contact of the wiring terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the top view and cross-sectional assembly structure of the melt and the horizontal plate in the utility model;

[0027] Figure 3 For this utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0028] Figure 4 For this utility model Figure 1 A schematic diagram of the enlarged structure of part B;

[0029] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the rectangular sheath in the utility model.

[0030] In the figure: 1. melt; 2. contact knife; 3. horizontal plate; 4. rectangular sheath; 5. first slide groove; 6. first slider; 7. rectangular through hole; 8. bidirectional screw; 9. dial wheel; 10. groove; 11. pressure plate; 12. threaded through hole; 13. screw. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0032] like Figure 1-5As shown, a current fast fuse comprises a fuse 1, wherein both ends of the top of the fuse 1 are provided with contact knives 2, and the top and bottom of the fuse 1 are fixedly installed with horizontal plates 3, and the fuse 1 is sleeved with two rectangular sheaths 4, and the rectangular sheaths 4 are slidably sleeved on the two horizontal plates 3. The top of the upper horizontal plate 3 is provided with two first slide grooves 5, and the first sliders 6 are slidably installed in the first slide grooves 5, and the first sliders 6 are fixed on the inner walls of the corresponding rectangular sheaths 4. A rectangular through hole 7 is penetrated on the upper horizontal plate 3, and the two first sliders 6 are threaded with the same bidirectional screw rod 8, and a dial wheel 9 is fixedly sleeved on the bidirectional screw rod 8, and the dial wheel 9 is rotated to install The touch blade 2 is installed in the rectangular through hole 7, the top of the thumbwheel 9 extends to the outside of the rectangular through hole 7, and the touch blade 2 is located in the corresponding rectangular sheath 4. Through a simple covering protection structure, it is convenient to cover and protect the terminal, which can effectively prevent the terminal from being exposed to the outside, thereby preventing the terminal from being covered with dust or being accidentally touched and loosened, thereby effectively avoiding the problem of poor contact of the terminal. The rectangular sheath 4 also includes two grooves 10, and the two grooves 10 are respectively opened on the top and bottom inner walls of the rectangular sheath 4. Two pressing plates 11 are slidably installed in the rectangular sheath 4, and the pressing plates 11 are slidably connected to the inner walls of the corresponding grooves 10. A screw thread is penetrated through the inner wall of one side of the groove 10. The threaded through hole 12 has a screw rod 13 threaded through it, one end of the screw rod 13 is rotatably connected to the corresponding pressure plate 11, and the pressure plate 11 is adapted to the contact knife 2. By configuring in this way, the power connection knife clamp can be effectively prevented from being separated from the contact knife 2, thereby effectively ensuring the contact effect of the terminal. Two second slide grooves are provided at the bottom of the horizontal plate 3 located below, and a second slider is slidably installed in the second slide groove. The second slider is fixed on the inner wall of the corresponding rectangular sheath 4. By configuring the second slide groove and the second slider, it is convenient to limit the rectangular sheath 4. A limiting rod is fixedly installed in the second slide groove, and the limiting rod slides through the corresponding second slider. By setting a limit rod, it is convenient to limit the second sliding block. A through hole is penetrated between the first sliding groove 5 and the rectangular through hole 7. The bidirectional screw rod 8 rotates and passes through the two through holes. By setting the through hole, it is convenient to support and limit the bidirectional screw rod 8. The side of the pressure plate 11 away from the corresponding groove 10 is fixedly installed with an anti-skid pad. The material of the anti-skid pad is rubber. By setting the anti-skid pad, the pressure plate 11 can be prevented from slipping off the power-connecting knife clamp of the contact knife 2. A circular groove is opened at one end of the screw rod 13, and a rotating rod is rotatably installed in the circular groove. One end of the rotating rod is fixed on the corresponding pressure plate 11. By setting the circular groove and the rotating rod, the pressure plate 11 and the screw rod 13 are convenient to be rotatably connected.

[0033] The working principle of the utility model is as follows: when in use, first slide the two contact knives 2 into the corresponding power-connecting knife clamps, then rotate the dial wheel 9, so that the dial wheel 9 is driven to rotate in the rectangular through hole 7, so that the bidirectional screw rod 8 is driven to rotate, and at the same time, the bidirectional screw rod 8 drives the two first sliders 6 to slide in the corresponding first slide grooves 5 and move away from each other, so that the two rectangular sheaths 4 are driven to slide and move laterally on the two cross plates 3 and move away from each other until the contact knives 2 and the power-connecting knife clamps are shielded and protected. By setting it in this way, it is convenient to cover and protect the wiring terminals, and it can It can effectively prevent the terminal from being exposed to the outside, and thus prevent the terminal from being covered with dust or being accidentally touched and loosened, and thus effectively avoid the problem of poor contact of the terminal. Subsequently, multiple screw rods 13 are rotated, and the screw rods 13 are rotated in the corresponding threaded through holes 12 and enter the rectangular sheath 4, so that the pressure plate 11 is pushed to slide in the rectangular sheath 4, and at the same time, the pressure plate 11 slides out of the corresponding groove 10 until the pressure plate 11 presses the power connection knife clamp tightly. Through such an arrangement, the power connection knife clamp can be effectively prevented from being separated from the contact knife 2, and thus the contact effect of the terminal can be effectively guaranteed.

[0034] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A fast current fuse, comprising a fuse (1), wherein both ends of the top of the fuse (1) are provided with contact blades (2), characterized in that: The top and bottom of the melt (1) are fixedly installed with a transverse plate (3), and two rectangular sleeves (4) are sleeved on the melt (1), and the rectangular sleeves (4) are slidably sleeved on the two transverse plates (3). The top of the upper transverse plate (3) is provided with two first slide grooves (5), and a first slider (6) is slidably installed in the first slide groove (5), and the first slider (6) is fixed on the inner wall of the corresponding rectangular sleeve (4). The upper transverse plate (3) is penetrated by a rectangular through hole (7), and the two first sliders (6) are threaded with the same bidirectional screw rod (8), and a thumb wheel (9) is fixedly sleeved on the bidirectional screw rod (8), and the thumb wheel (9) is rotatably installed in the rectangular through hole (7), and the top of the thumb wheel (9) extends to the outside of the rectangular through hole (7), and the contact knife (2) is located in the corresponding rectangular sleeve (4).

2. A fast current fuse according to claim 1, characterized in that: The rectangular sheath (4) further comprises two grooves (10), wherein the two grooves (10) are respectively arranged on the top and bottom inner walls of the rectangular sheath (4), and two pressure plates (11) are slidably installed in the rectangular sheath (4), wherein the pressure plates (11) are slidably connected with the inner walls of the corresponding grooves (10), and a threaded through hole (12) is penetrated on the inner wall of one side of the groove (10), and a screw rod (13) is penetrated through the inner thread of the threaded through hole (12), and one end of the screw rod (13) is rotatably connected with the corresponding pressure plate (11), and the pressure plate (11) is adapted to the contact knife (2).

3. A fast current fuse according to claim 1, characterized in that: Two second sliding grooves are provided at the bottom of the horizontal plate (3) located at the bottom, and second sliding blocks are slidably installed in the second sliding grooves. The second sliding blocks are fixed on the inner wall of the corresponding rectangular sheath (4).

4. A fast current fuse according to claim 3, characterized in that: A limiting rod is fixedly installed in the second sliding groove, and the limiting rod slides through the corresponding second sliding block.

5. A fast current fuse according to claim 1, characterized in that: A through hole is provided between the first slide groove (5) and the rectangular through hole (7), and the bidirectional screw rod (8) rotates through the two through holes.

6. A fast current fuse according to claim 2, characterized in that: An anti-skid pad is fixedly mounted on one side of the pressure plate (11) away from the corresponding groove (10), and the material of the anti-skid pad is rubber.

7. A fast current fuse according to claim 2, characterized in that: A circular groove is formed at one end of the screw rod (13), a rotating rod is rotatably mounted in the circular groove, and one end of the rotating rod is fixed on the corresponding pressing plate (11).

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