A ceramic tube fuse with firm assembly

Abstract

The utility model relates to ceramic tube fuse technology field especially relates to an assembled firm ceramic tube fuse, including the shell, the both sides end face center of shell has screw hole respectively, and the inside of the positioning cavity of shell is rotated and is connected with the insulating plate through fixed shaft respectively on both sides, and the inner end of insulating plate is provided with the compression piece, and the screw hole is screwed into the locking block, the inside of locking block is inserted to the wiring terminal in the through, and the wiring terminal is inserted and is placed between the compression piece of up and down along the center of locking block and inwards, and the locking block is screwed inwards and pushes the insulating plate and rotates around the fulcrum, and the wiring terminal is pressed tightly by utilizing the compression piece, the ceramic tube fuse that the utility model puts forward, and the locking block of fuse is screwed in from outside to inside and can act on two insulating plates in the fuse simultaneously, ensure that the symmetrical insulating plate of up and down can press connect the wiring terminal, and moreover, utilize the thread column self -locking characteristic of locking block and guarantee that the wiring assembly is firm between the insulating plate and wiring terminal.

Description

Technical Field

[0001] This utility model relates to the field of ceramic tube fuse technology, and in particular to a reliably assembled ceramic tube fuse. Background Technology

[0002] The main function of a ceramic tube fuse is to protect circuits and equipment from damage caused by short circuits and overloads. When the current in the circuit exceeds the specified value, the fusible element inside the fuse melts rapidly due to the high temperature, thereby cutting off the circuit and preventing equipment damage and fire.

[0003] The main reasons for the unreliable assembly of existing ceramic tube fuses are poor contact and poor fixation. The insulator inside the ceramic tube fuse not only needs to play a role in insulation, but also needs to provide alignment and protection for the protruding contacts. When the assembly is not in place, it will cause the fuse resistance to increase, generate too much heat, and may cause a fire, causing serious damage to the equipment and the surrounding environment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a robustly assembled ceramic tube fuse.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A robustly assembled ceramic tube fuse includes a housing, with threaded holes at the center of each of the two end faces of the housing. The central area of ​​the housing is designed as a fusing cavity, and the two sides are designed as positioning cavities.

[0007] In a preferred embodiment, a groove is formed in the side wall of the outer casing, and arc-extinguishing plates are glued to the inner walls of the two sides of the groove, with an insulating block glued to the inner end of the arc-extinguishing plate.

[0008] In a preferred embodiment, a fuse element is provided in the fuse cavity, and connecting blocks are glued to both ends of the fuse element.

[0009] In a preferred embodiment, the fusion cavity and the positioning cavity of the outer shell are separated by a limiting plate.

[0010] The upper and lower sides of the positioning cavity are rotatably connected to insulating plates via fixed shafts, and the insulating plates are arc-shaped plates. In a preferred embodiment, the cavity contour of the positioning cavity is designed as an arched surface to allow for the insulating plates to rotate at an angle.

[0011] The inner ends of the upper and lower insulating plates are provided with clamping plates, and the outer ends of the upper and lower insulating plates are designed with inward flanges. Locking blocks are screwed into the threaded holes at both ends. The front end of the locking block facing the positioning cavity is designed as a conical end, and the rear end is designed as a handle.

[0012] The locking block is internally permeable and has power lines and terminals inserted into it. The terminals are inserted inward and placed between the upper and lower clamping plates.

[0013] In a preferred embodiment, the locking block has a through hole extending from front to back, through which wires and terminals pass.

[0014] The conical end is inserted inward and pushes the inner flange to make the insulating plate rotate around the fulcrum, thereby pressing and fixing the upper and lower clamping plates and the wiring terminals. The middle part of the locking block is designed as a threaded post, which is adapted to the threaded hole on the end face of the outer shell.

[0015] In a preferred embodiment, the clamping plate is a metal sheet, which is connected to the connecting block in the fusion cavity via a wire to form a passage.

[0016] The beneficial effects of this utility model are:

[0017] The ceramic tube fuse proposed in this solution solves the problem of unreliable wiring in ceramic tube fuses, which affects the normal operation of the fuse and poses safety hazards. The locking blocks at both ends act on the two insulating plates on the same side inside the fuse. The symmetrical insulating plates can perform temperature pressing on the terminals. Moreover, the self-locking characteristic of the threaded post on the locking block ensures that the wiring assembly between the insulating plate and the terminal is reliable, ensuring the normal use of the fuse. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the ceramic tube fuse proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the fuse proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the locking block proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the clamping ring proposed in this utility model.

[0022] In the diagram: 1. Outer shell; 2. Arc extinguishing plate; 3. Insulating block; 4. Fuse; 5. Positioning cavity; 6. Fixed shaft; 7. Insulating plate; 71. Inner flange; 8. Pressing plate; 9. Locking block; 91. Conical end; 92. Threaded post; 93. Handle; 94. Through hole; 10. Limiting plate; 11. Threaded hole; 12. Connecting block. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In this embodiment, refer to Figure 1-4 A reliably assembled ceramic tube fuse includes a housing 1. Threaded holes 11 are respectively formed at the center of each of the two end faces of the housing 1. The central area of ​​the housing 1 is designed as a fusing cavity, and the two sides are designed as positioning cavities 5. In the prior art, a groove is formed on the side wall of the housing 1, and an arc-extinguishing plate 2 is glued to the inner wall of each side of the groove. An insulating block 3 is glued to the inner end of the arc-extinguishing plate 2. A fusing element 4 is disposed in the fusing cavity, and connecting blocks 12 are glued to both ends of the fusing element 4.

[0025] The upper and lower sides of the positioning cavity 5 are respectively rotatably connected to insulating plates 7 via fixed shafts 6. The insulating plates 7 are arc-shaped plates, combined with the attached... Figure 2 It can be seen that the cavity contour of the positioning cavity 5 is designed as an arched surface, allowing the insulating plate 7 to rotate around the fulcrum at a certain angle.

[0026] The inner ends of the upper and lower insulating plates 7 are provided with clamping plates 8, and the outer ends of the upper and lower insulating plates 7 are designed with inward flanges 71.

[0027] Locking blocks 9 are screwed into the threaded holes 11 at both ends, respectively, and then screwed into the attached... Figure 3 It can be seen that the front end of the locking block 9 facing the positioning cavity 5 is designed as a conical end 91, the rear end is designed as a handle 93, and the middle part of the locking block 9 is designed as a threaded post 92, which is compatible with the threaded hole 11 on the end face of the outer shell 1.

[0028] The locking block 9 has a through hole 94 that runs from front to back, through which wires and terminals pass and enter the positioning cavity 5.

[0029] The terminal block is inserted inward and placed between the upper and lower clamping plates 8. The conical end 91 is inserted inward and pushes the inner flange 71 to make the insulating plate 7 rotate around the fulcrum, thereby pressing and fixing the upper and lower clamping plates 8 and the terminal block.

[0030] It should be noted that the clamping plate 8 is a metal sheet, which is connected to the connecting block 12 in the fuse cavity through a wire to form a passage.

[0031] Finally, the fuse chamber and the positioning chamber 5 of the outer casing 1 are separated by a limiting plate 10. The limiting plate 10 serves two purposes: first, to separate the fuse chamber and the positioning chamber 5; and second, to limit the position of the wiring terminal. Since there is no field of vision when the wiring terminal is inserted from the outside to the inside, when the wiring terminal touches the limiting plate 10, it can be ensured that it is exactly between the upper and lower clamping plates 8.

[0032] During the assembly of the ceramic tube fuse, the terminals and wires are first fed into the positioning cavity 5 via the locking block 9. Then, the handle 93 is rotated, causing the locking block 9 to screw inward along the threaded hole 11. The tapered end 91 at the front of the locking block 9 spreads open the inner flanges 71 of the two insulating plates 7, thereby bringing the clamping plates 8 of the insulating plates 7 closer together until the terminals are pressed tightly. Furthermore, because the assembly and fixation are done via a screw mechanism, the terminals are securely assembled and will not easily fall off.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A reliably assembled ceramic tube fuse, characterized in that, The housing includes a shell (1), with threaded holes (11) at the center of each of the two end faces of the shell (1). The middle area inside the shell (1) is designed as a fuse chamber, and the two sides are designed as positioning chambers (5). The upper and lower sides of the positioning chamber (5) are rotatably connected to an insulating plate (7) via a fixed shaft (6). The insulating plate (7) is an arc-shaped plate. The inner ends of the upper and lower insulating plates (7) are provided with clamping plates (8), and the outer ends of the upper and lower insulating plates (7) are designed as inward flanges (71). Locking blocks (9) are screwed into the threaded holes (11) at both ends respectively. The front end of the locking block (9) facing the positioning cavity (5) is designed as a conical end (91) and the rear end is designed as a handle (93). The locking block (9) is internally connected and the power supply line and terminal are inserted. The terminal is inserted inward and placed between the upper and lower clamping plates (8). The conical end (91) is inserted inward and pushes the inner flange (71) to make the insulating plate (7) rotate around the fulcrum, thereby pressing and fixing the upper and lower clamping plates (8) and the terminal.

2. The reliably assembled ceramic tube fuse according to claim 1, characterized in that, The outer shell (1) has a groove on its side wall, and an arc extinguishing plate (2) is glued to the inner wall of each side of the groove. An insulating block (3) is glued to the inner end of the arc extinguishing plate (2).

3. A reliably assembled ceramic tube fuse according to claim 1, characterized in that, The fuse cavity is provided with a fuse element (4), and the two ends of the fuse element (4) are respectively glued with connecting blocks (12).

4. A reliably assembled ceramic tube fuse according to claim 1, characterized in that, The cavity contour of the positioning cavity (5) is designed as an arched surface to allow the insulating plate (7) to rotate at an angle.

5. A reliably assembled ceramic tube fuse according to claim 1, characterized in that, The middle part of the locking block (9) is designed as a threaded post (92), which is adapted to the threaded hole (11) on the end face of the outer shell (1).

6. A reliably assembled ceramic tube fuse according to claim 1, characterized in that, The locking block (9) has a through hole (94) that runs from front to back, through which wires and terminals pass.

7. A reliably assembled ceramic tube fuse according to claim 1, characterized in that, The clamping plate (8) is a metal sheet, which is connected to the connecting block (12) in the fuse cavity through a wire to form a passage.

8. A reliably assembled ceramic tube fuse according to claim 1, characterized in that, The fuselage cavity and the positioning cavity (5) of the outer shell (1) are separated by a limiting plate (10).

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