A stable-installation snap-fit ​​high-voltage fuse

Abstract

This utility model discloses a stable-installation snap-fit ​​high-voltage fuse, relating to the field of high-voltage fuse technology. It aims to solve the problems of traditional high-voltage fuses being inconvenient to disassemble and install, and the repeated removal and installation of screws easily damaging the installation area. The key technical points are: an outer ceramic tube, with inner fuse tubes detachably connected to both ends of the outer ceramic tube; contacts detachably connected to both ends of the inner fuse tubes; a cover plate detachably connected to the side of the contacts away from the outer ceramic tube; a positioning block fixedly connected to the side of the cover plate near the outer ceramic tube; a positioning slot adapted to the positioning block inside the contact; a fixing slot of equal width to the positioning block on the side of the outer ceramic tube near the cover plate; and a positioning locking hole communicating with the inside of the fixing slot on the side wall of the outer ceramic tube. This achieves the effects of easy disassembly and maintenance, stable installation, and low-wear disassembly.

Description

Technical Field

[0001] This utility model relates to the technical field of high-voltage fuses, and in particular to a snap-fit ​​high-voltage fuse that can be stably installed. Background Technology

[0002] A fuse is a thermally responsive device that is connected in a circuit to disconnect the circuit when the current exceeds a specified value and for a specified time. The fuse element or fuse wire in the fuse is made of a fusible alloy with high resistivity or a good conductor with a small cross-sectional area. In order to protect the wiring harness and other equipment, it is intentionally designed and manufactured as the weakest part of the circuit. Under normal operating conditions, the fuse element or fuse wire in the fuse will not melt; when a short circuit or severe overload occurs in the system, the fuse element or fuse wire will melt immediately, thereby protecting the circuit and electrical equipment.

[0003] A fuse is the simplest protective electrical appliance, used to protect electrical equipment from damage caused by overload and short circuit currents. Different types of high-voltage fuses, such as outdoor drop-out type and indoor type, are selected according to the installation conditions and uses.

[0004] The existing technical solutions mentioned above have the following drawbacks: Traditional high-voltage fuses are mostly fixed to the internal structure with screws, which means that the screws need to be constantly disassembled and reassembled when the whole is being repaired or parts are being replaced. Not only is it inconvenient to disassemble and install the whole, but repeated disassembly and reassembly of the screws can easily damage the installation parts and reduce the service life of the whole. Utility Model Content

[0005] The purpose of this invention is to provide a snap-fit ​​high-voltage fuse that is quick to assemble, easy to maintain, and has a stable installation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A stable-installation snap-fit ​​high-voltage fuse includes an outer ceramic tube, with inner fuse tubes detachably connected to both ends of the outer ceramic tube. Contacts are detachably connected to both ends of the inner fuse tubes. A cover plate is detachably connected to the side of the contact away from the outer ceramic tube. A positioning block is fixedly connected to the side of the cover plate near the outer ceramic tube. A positioning slot adapted to the positioning block is provided inside the contact. A fixing slot with the same width as the positioning block is provided on the side of the outer ceramic tube near the cover plate. A positioning locking hole communicating with the inside of the fixing slot is provided on the side wall of the outer ceramic tube. A positioning button adapted to the positioning locking hole is movably connected inside the positioning block.

[0008] By adopting the above technical solution, the cover plate and the outer ceramic tube are installed by plugging and fixing, and are fixed by the engagement of positioning buttons and positioning holes. This ensures stable installation while reducing the wear and tear caused by repeated disassembly and assembly, thereby increasing the overall service life.

[0009] Furthermore, the inner molten tube is detachably connected to a molten material, and the contact has a fixed mounting groove for installing the molten material, which is distributed correspondingly to the molten material.

[0010] By adopting the above technical solution, the fixed mounting slot can be used to install the corresponding melt, ensuring stable installation of the melt, and the melt can be easily replaced after the contact is disassembled, increasing overall flexibility.

[0011] Furthermore, a fixing hole is provided on the side of the inner molten tube near the contact, and a fixing post adapted to the fixing hole is fixedly connected to the side of the cover plate near the inner molten tube. The fixing post and the fixing hole are distributed correspondingly.

[0012] By adopting the above technical solution, the fixed pin and the fixed socket can be easily inserted and positioned, and there will be no displacement after the fixed pin and the fixed socket are inserted, thus ensuring good overall installation stability.

[0013] Furthermore, the contact has a through hole for the fixed insertion post to pass through, the inner diameter of the through hole is equal to the outer diameter of the fixed insertion post, and the fixed insertion post is distributed correspondingly to the through hole.

[0014] By adopting the above technical solution, the inner diameter of the through hole is equal to the outer diameter of the fixed plug, which can ensure that the contact maintains a good positioning effect after insertion, that is, no large shaking or displacement will occur after the overall installation is completed.

[0015] Furthermore, the positioning insert has a movable groove inside for the positioning button to move, and a mounting spring is fixedly connected inside the movable groove. The side of the mounting spring away from the movable groove is fixedly connected to the positioning button.

[0016] By adopting the above technical solution, the spring drives the positioning button to engage and fix with the positioning hole, and the spring-driven structure facilitates disassembly and assembly, increasing overall practicality.

[0017] Furthermore, the positioning insert, positioning button, and positioning hole are distributed accordingly, and the positioning button and positioning hole are all smooth surface structures.

[0018] By adopting the above technical solution, the positioning buttons and positioning holes with smooth surfaces facilitate positioning and insertion, and make it easy to disassemble and repair the whole system.

[0019] In summary, the beneficial technical effects of this utility model are as follows:

[0020] 1. The installation adopts a plug-in fixing method, and is fixed by the engagement of positioning buttons and positioning holes. This ensures stable installation while reducing wear and tear caused by repeated disassembly and assembly, thereby increasing the overall service life and achieving the effect of easy disassembly and maintenance.

[0021] 2. Fixed pins and fixed holes are used for insertion and positioning. After the fixed pins and fixed holes are inserted, there will be no offset, thus ensuring good overall installation stability. The inner diameter of the through hole is equal to the outer diameter of the fixed pin, which can ensure that the contact maintains a good positioning effect after insertion. That is, after the overall installation is completed, there will be no large shaking or offset, achieving a stable installation effect.

[0022] 3. The device uses a spring-driven positioning button to engage and fix the positioning hole. The spring-driven structure facilitates disassembly and assembly, and the smooth surface of the positioning button and positioning hole makes positioning and insertion easy, achieving a low-wear disassembly and assembly effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0025] Figure 3 This utility model Figure 2 A schematic diagram of the split structure at point A in the middle.

[0026] In the diagram, 1. Outer ceramic tube; 2. Inner molten tube; 3. Contact; 4. Cover plate; 5. Positioning block; 6. Positioning slot; 7. Fixing slot; 8. Positioning hole; 9. Positioning button; 21. Molten material; 22. Fixing mounting groove; 23. Fixing insertion hole; 24. Fixing post; 31. Through hole; 51. Movable groove; 52. Mounting spring. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1A stable-installation snap-fit ​​high-voltage fuse includes an outer ceramic tube 1, with inner fuse tubes 2 detachably connected to both ends of the outer ceramic tube 1, and contacts 3 detachably connected to both ends of the inner fuse tubes 2. A cover plate 4 is detachably connected to the side of the contact 3 away from the outer ceramic tube 1, and a positioning block 5 is fixedly connected to the side of the cover plate 4 near the outer ceramic tube 1. A positioning slot 6 adapted to the positioning block 5 is provided inside the contact 3. A fixing slot 7 with the same width as the positioning block 5 is provided on the side of the outer ceramic tube 1 near the cover plate 4. A positioning locking hole 8 communicating with the inside of the fixing slot 7 is provided on the side wall of the outer ceramic tube 1. A positioning button 9 adapted to the positioning locking hole 8 is movably connected inside the positioning block 5. The cover plate 4 and the outer ceramic tube 1 can be inserted and positioned, and the whole is fixed by snapping together through the positioning locking hole 8 and the positioning button 9, which facilitates disassembly, assembly and maintenance.

[0029] Reference Figure 2 The inner fusible tube 2 has a detachable fusible element 21 inside. The contact 3 has a mounting groove 22 for installing the fusible element 21. The mounting groove 22 corresponds to the fusible element 21 and can be used to lock and position the fusible element 21, ensuring easy disassembly and installation of the fusible element 21 even after the contact 3 is completely disassembled. The inner fusible tube 2 has a fixing hole 23 on the side near the contact 3. The cover plate 4 has a fixing device that matches the fixing hole 23 on the side near the inner fusible tube 2. The fixed insertion post 24 and the fixed insertion hole 23 are correspondingly distributed. The fixed insertion post 24 and the fixed insertion hole 23 can be inserted and positioned to prevent the overall installation from being misaligned. The contact 3 has a through hole 31 for the fixed insertion post 24 to pass through. The inner diameter of the through hole 31 is equal to the outer diameter of the fixed insertion post 24. The fixed insertion post 24 and the through hole 31 are correspondingly distributed. When the fixed insertion post 24 and the through hole 31 are inserted and positioned, the contact 3 will not be misaligned, thus ensuring normal use of the whole.

[0030] Reference Figure 3 The positioning insert 5 has an internal movable groove 51 for the positioning button 9 to move. A mounting spring 52 is fixedly connected inside the movable groove 51. The side of the mounting spring 52 away from the movable groove 51 is fixedly connected to the positioning button 9. The mounting spring 52 drives the positioning button 9 to engage with the positioning hole 8, thereby ensuring a good overall installation effect and making the whole assembly and disassembly convenient. The positioning insert 5, positioning button 9 and positioning hole 8 are distributed correspondingly. The positioning button 9 and positioning hole 8 are all smooth in surface structure. The smooth surface structure of the positioning button 9 and positioning hole 8 facilitates insertion and positioning, ensuring a good overall installation effect.

[0031] The implementation principle of this embodiment is as follows: First, the molten body 21 is inserted and positioned into the fixing groove 22 inside the contact 3 at one end. Then, the inner molten tube 2 is inserted into the outer ceramic tube 1 for limiting, and the molten body 21 with one end limited is inserted into the inner molten tube 2 to ensure that the contact 3 and one end of the inner molten tube 2 are in contact with each other. Next, the fixing groove 22 in the contact 3 at the other end is inserted and positioned into the other end of the molten body 21. Finally, the positioning plug 5 passes through the positioning slot 6 and is inserted and fixed into the fixing slot 7 to ensure that the installation spring 52 drives the positioning button 9 to engage with the positioning hole 8, thereby ensuring a good overall installation effect. During the overall insertion process, the fixing plug 24 passes through the through hole 31 and is inserted and positioned into the fixing plug hole 23 to prevent the overall installation from shifting and increase the stability of the overall installation.

[0032] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A stably installed snap-fit ​​high-voltage fuse, comprising an outer ceramic tube (1), wherein inner fuse tubes (2) are detachably connected to both ends of the outer ceramic tube (1), and contacts (3) are detachably connected to both ends of the inner fuse tubes (2), wherein a cover plate (4) is detachably connected to the side of the contacts (3) away from the outer ceramic tube (1), characterized in that: A positioning plug (5) is fixedly connected to the side of the cover plate (4) near the outer ceramic tube (1). A positioning slot (6) adapted to the positioning plug (5) is opened inside the contact (3). A fixing slot (7) with the same width as the positioning plug (5) is opened on the side of the outer ceramic tube (1) near the cover plate (4). A positioning card hole (8) communicating with the inside of the fixing slot (7) is opened on the side wall of the outer ceramic tube (1). A positioning button (9) adapted to the positioning card hole (8) is movably connected inside the positioning plug (5).

2. The stably installed snap-fit ​​high-voltage fuse according to claim 1, characterized in that: The inner molten tube (2) is detachably connected to a molten material (21), and the contact (3) is provided with a fixed mounting groove (22) for installing the molten material (21), and the fixed mounting groove (22) is distributed correspondingly to the molten material (21).

3. The stably installed snap-fit ​​high-voltage fuse according to claim 2, characterized in that: The inner molten tube (2) has a fixed insertion hole (23) on the side near the contact (3), and the cover plate (4) has a fixed insertion post (24) that is compatible with the fixed insertion hole (23) on the side near the inner molten tube (2). The fixed insertion post (24) is distributed correspondingly to the fixed insertion hole (23).

4. The stably installed snap-fit ​​high-voltage fuse according to claim 3, characterized in that: The contact (3) has a through hole (31) for the fixed insertion post (24) to pass through. The inner diameter of the through hole (31) is equal to the outer diameter of the fixed insertion post (24). The fixed insertion post (24) and the through hole (31) are distributed correspondingly.

5. The stably installed snap-fit ​​high-voltage fuse according to claim 1, characterized in that: The positioning insert (5) has an active groove (51) for the positioning button (9) to move inside. An installation spring (52) is fixedly connected inside the active groove (51). The side of the installation spring (52) away from the active groove (51) is fixedly connected to the positioning button (9).

6. The stably installed snap-fit ​​high-voltage fuse according to claim 1, characterized in that: The positioning insert (5), positioning button (9) and positioning hole (8) are distributed accordingly, and both the positioning button (9) and positioning hole (8) have smooth surface structures.

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