Fuse holder and fuse

Abstract

The utility model provides a fuse base, its one end that clamps the conducting plate sets up the plug -in column, the other end sets up the plug -in hole, and makes the plug -in column plug -in in the plug -in hole, fastens the clamping piece of two sides of clamping the conducting plate through the thread hole and the limiting bolt of plug -in column, not only has strengthened the stability of clamping structure, but also has improved the anti -vibration and anti -loosening ability of fuse in the use process obviously, simultaneously, the pair of opposite screw holes that set up in the center top of clamping the conducting plate can be through bolt additional fixed, when the fuse is inserted and sets up in clamping the conducting plate, the clamping conducting plate of clamping the conducting plate middle part is connected through the bolt, and then realizes the mechanical lock solid structure between fuse and fuse base, and then provides more reliable clamping force and limiting effect, avoids the fuse to come loose because of thermal expansion and cold shrink, mechanical impact and other factors, in addition, the elastic sheet is assisted to support the conducting plate, helps to promote the elastic recovery performance and clamping uniformity.

Description

Technical Field

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

[0002] A fuse is an important electrical component used for overcurrent protection in a circuit, typically consisting of a fuse body and a fuse base. The fuse base primarily serves to secure the fuse, establish the electrical connection, and ensure its stable operation. In practical applications, knife-type fuses are widely used in various power systems and electrical equipment due to their compact structure, reliable connection, and ease of replacement. The design of the base structure is crucial for ensuring the successful insertion and removal of knife-type fuses and their stability during use.

[0003] In existing technologies, fuse bases typically use two conductive clamps to hold and fix the fuse. While this structure is simple, it has certain shortcomings. Firstly, the clamping conductive plates rely heavily on the restoring force of elastic plates to hold the fuse. Over time, the elasticity of the elastic plates gradually weakens, leading to a decrease in clamping force and causing the fuse to loosen or even fall off, affecting the stability and safety of the circuit. Secondly, after the fuse is inserted, it is only fixed by elastic force, lacking further mechanical fastening structures, and cannot effectively resist the displacement risks caused by vibration, thermal expansion and contraction, etc. Therefore, it is necessary to provide a fuse base with higher clamping stability and a fuse including such a fuse base. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a fuse base that effectively improves upon the problems of poor clamping stability in some traditional fuse bases.

[0005] A fuse base includes a base body with conductive plates at both ends of its top. A fixing assembly for connecting a knife-type fuse is located on the top of each conductive plate. A first mounting hole is provided on each conductive plate, and a fixing bolt and a nut are inserted into the mounting hole. The fixing assembly includes a clamping conductive plate with elastic plates fixedly connected to both sides. An extension block is provided at each end of the clamping conductive plate along its length, and a second mounting hole is provided on each extension block. The extension block is connected to the base body via a mounting bolt. A plug-in post is provided at one end of the clamping conductive plate, and a plug-in hole is provided at the other end. The plug-in post is inserted into the plug-in hole, and a threaded hole is provided along its axis at the threaded hole. A limit bolt is provided at the threaded hole, and a pair of opposing threaded holes are provided at the top center of the clamping conductive plate, connected by bolts.

[0006] Preferably, the two clamping conductive plates are symmetrically distributed around the base body.

[0007] Preferably, the base has a recessed hole in the middle, and the recessed hole has a threaded hole in the middle.

[0008] Preferably, an electrical insulating pad is provided between the conductive sheet and the base body, and the insulating pad is made of polytetrafluoroethylene material.

[0009] Preferably, the outer surface of the plug has multiple annular grooves recessed inward, and multiple anti-slip raised rubber rings are provided on the annular grooves, with the anti-slip raised rubber rings abutting against the inner wall of the plug hole.

[0010] Preferably, the elastic sheet for holding the conductive plate adopts a double-layer elastic sheet structure, including a main elastic layer and a secondary reinforcing elastic layer, wherein the secondary reinforcing elastic layer is made of high carbon steel plate.

[0011] A fuse includes a blade fuse and a fuse base for engaging with the blade fuse.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention provides a fuse base with a plug-in post at one end and a plug-in hole at the other end, where the plug-in post is inserted into the plug-in hole. The threaded holes of the plug-in post and limiting bolts secure the clamping plates on both sides of the conductive plate, enhancing the stability of the clamping structure and significantly improving the fuse's resistance to vibration and loosening during use. Simultaneously, a pair of opposing threaded holes at the top center of the conductive plate can be further secured with bolts. When the fuse is inserted into the conductive plate, the middle section of the conductive plate is bolted together, achieving a mechanical locking structure between the fuse and the fuse base. This provides more reliable clamping force and limiting effect on top of conventional electrical connections, preventing the fuse from loosening due to thermal expansion and contraction, mechanical impact, or other factors. Furthermore, the elastic sheet provides auxiliary support for the conductive plate, improving overall elastic recovery performance and clamping uniformity, extending the device's service life, and ensuring the stability and safety of circuit operation. This is particularly suitable for power systems requiring high connection reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation structure of the fuse described in this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the fuse base described in this utility model;

[0016] Figure 3This is a partial structural schematic diagram of the fuse base described in this utility model;

[0017] Figure 4 This is a schematic diagram of the conductive sheet and fixing assembly described in this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the fixing component described in this utility model.

[0019] in:

[0020] 1-Base body, 2-Knife-type fuse, 3-Conductive sheet, 4-Fixing assembly, 401-Clamping conductive plate, 402-Elastic sheet, 403-Extension block, 404-Mounting bolt, 405-Limit bolt, 5-Nut, 6-Fixing bolt, 7-Counterhead hole, 8-Threaded hole. Detailed Implementation

[0021] The embodiments described below are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] See Figures 1-5 This embodiment provides a fuse base, including a base body 1. Conductive plates 3 are provided at both ends of the top of the base body 1. A fixing assembly 4 for connecting a knife-type fuse 2 is provided on the top of each conductive plate 3. A first mounting hole is provided on each conductive plate 3, and a fixing bolt 6 is inserted into the first mounting hole and connected to a nut 5. The fixing assembly 4 includes a clamping conductive plate 401. An elastic plate 402 is fixedly connected to both sides of the clamping conductive plate 401. An extension block 403 is provided at both ends along the length of the clamping conductive plate 401. A second mounting hole is provided on each extension block 403, and the extension block 403 is secured by a mounting bolt 404. For connection with the base body 1, one end of the clamping conductive plate 401 (i.e., on one side of the clamping piece) is provided with a plug-in post, and the other end of the clamping conductive plate 401 (i.e., on the opposite clamping piece on the other side) is provided with a plug-in hole (the plug-in hole is through). The plug-in post is inserted into the plug-in hole. The plug-in post has a threaded hole along its axis. A limit bolt 405 is provided at the threaded hole (the limit bolt 405 is screwed into the threaded hole from the side of the plug-in hole away from the opposite clamping piece, and the end cap of the limit bolt 405 abuts against the side wall of the plug-in hole). A pair of opposite threaded holes are provided at the top center of the clamping conductive plate 401, and the threaded holes are connected by bolts.

[0023] Specifically, the clamping conductive plate 401 is detachably connected to the base body 1 by mounting bolts 404, realizing the replaceability of the components. For example, during handling (some parts are often damaged during transportation), one of the clamping conductive plates 401 may be bent, making it impossible to insert the fuse. Therefore, it is only necessary to replace one of the clamping conductive plates 401.

[0024] It should be noted that when the fuse base of this application is connected to the knife-type fuse 2, the limiting bolt 405 on the plug-in post is loosened so that the two clamping plates of the clamping conductive plate 401 can move relative to each other, making it easier for the knife-type fuse 2 to be inserted between the clamping plates. Then, the plug-in plates at both ends of the knife-type fuse 2 are respectively placed at the clamping conductive plates 401 at both ends. Then, it is pressed down so that the plug-in plates of the knife-type fuse 2 are inserted between the clamping conductive plates 401. After that, the limiting bolt 405 is tightened so that the two clamping plates are clamped. Then, the threaded hole at the top center of the clamping conductive plate 401 (that is, the two clamping plates included in the clamping conductive plate 401 each have a corresponding threaded hole) is bolted to connect the two threaded holes so that the knife-type fuse 2 is tightly installed at the fuse base.

[0025] Preferably, the two clamping conductive plates 401 are symmetrically distributed around the base body 1. Preferably, a recessed hole 7 is provided in the middle of the base, and a threaded hole 8 is provided in the middle of the recessed hole 7. The threaded hole 8 facilitates subsequent installation and fixation of the base.

[0026] Preferably, an electrical insulating gasket is further provided between the conductive sheet 3 and the base body 1, and the insulating gasket is made of polytetrafluoroethylene (PTFE). The purpose of providing the insulating gasket is to effectively isolate the electrical contact between the conductive sheet 3 and the base body 1, preventing safety hazards such as leakage and short circuits caused by direct contact between the conductive sheet 3 and the base. PTFE has excellent insulation properties, high temperature resistance, and chemical stability, and can meet the usage requirements of fuses in various complex electrical environments, further improving the insulation performance and operational safety of the overall fuse base structure. In addition, the insulating gasket can also absorb and alleviate mechanical stress during the assembly process to a certain extent, improving the stability and reliability of the connection.

[0027] Preferably, the outer surface of the plug-in post has multiple annular grooves recessed inward, and multiple anti-slip raised rubber rings are provided on the annular grooves. The anti-slip raised rubber rings abut against the inner wall of the plug-in hole. By providing annular grooves and installing anti-slip raised rubber rings on the surface of the plug-in post, a reliable anti-slip structure can be formed between the plug-in post and the plug-in hole, increasing the friction between them to a certain extent. The rubber rings have a certain degree of elasticity and cushioning performance, providing appropriate clamping force during assembly, while relieving hard contact between the plug-in post and the plug-in hole, avoiding structural wear or deformation, extending service life, and improving the stability and safety of the entire fuse base.

[0028] Preferably, the elastic sheet 402 of the clamping conductive plate 401 adopts a double-layer elastic sheet structure, including a main elastic layer and a secondary reinforcing elastic layer, wherein the secondary reinforcing elastic layer is made of high-carbon steel plate. By adopting a double-layer elastic sheet structure, the main elastic layer provides basic elastic clamping function, ensuring that the knife-type fuse 2 can be firmly clamped between the conductive plates, while the secondary reinforcing elastic layer provides additional structural support and enhanced elastic recovery force, thereby effectively solving the problem of elastic force attenuation and insufficient clamping force after a period of use of traditional single-layer elastic sheets (equivalent to a two-layer stacked structure). High-carbon steel plate has good rigidity and elastic recovery performance, and can maintain stable deformation recovery ability after multiple stresses, making it less prone to fatigue failure. This significantly improves the stability and service life of the fuse base during long-term operation, and enhances its reliability and safety in high-load electrical environments.

[0029] This application also provides a fuse comprising a blade-type fuse 2 and a fuse base for inserting and engaging with the blade-type fuse 2. The blade-type fuse 2 is securely inserted into the fuse base, preventing it from coming loose and ensuring a tight connection.

[0030] This utility model provides a fuse base, which has a plug-in post at one end and a plug-in hole at the other end of a clamping conductive plate 401. The plug-in post is inserted into the plug-in hole, and the clamping plates on both sides of the clamping conductive plate 401 are fastened by the threaded holes of the plug-in post and the limiting bolts 405. This not only enhances the stability of the clamping structure but also significantly improves the fuse's resistance to vibration and loosening during use. At the same time, a pair of opposing threaded holes at the top center of the clamping conductive plate 401 can be additionally fixed by bolts. When the fuse is inserted into the clamping conductive plate 401... Subsequently, the clamping conductive plate 401 in the middle is connected by bolts, thereby realizing the mechanical locking structure between the fuse and the fuse base. On the basis of conventional electrical connection, it provides more reliable clamping force and limiting effect, avoiding the fuse from loosening due to thermal expansion and contraction, mechanical impact and other factors. In addition, the elastic sheet 402 provides auxiliary support for the clamping conductive plate 401, which helps to improve the overall elastic recovery performance and clamping uniformity, extend the service life of the device, and ensure the stability and safety of circuit operation. It is especially suitable for power systems that require high connection reliability.

[0031] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A fuse base, characterized in that: The device includes a base body, with conductive plates at both ends of the top of the base body. A fixing component for connecting a knife-type fuse is provided on the top of the conductive plate. A first mounting hole is provided on the conductive plate, and a fixing bolt and a nut are inserted into the first mounting hole. The fixing component includes a clamping conductive plate, with an elastic sheet fixedly connected to both sides of the clamping conductive plate. An extension block is provided at each end of the clamping conductive plate along its length, and a second mounting hole is provided on each extension block. The extension block is connected to the base body via mounting bolts. One end of the clamping conductive plate is provided with a plug-in post, and the other end is provided with a plug-in hole. The plug-in post is inserted into the plug-in hole. A threaded hole is provided along the axis of the plug-in post, and a limit bolt is provided at the threaded hole. A pair of opposing threaded holes are provided at the top center of the clamping conductive plate, and these threaded holes are connected by bolts.

2. The fuse base as described in claim 1, characterized in that, The two clamping conductive plates are symmetrically distributed around the base body.

3. The fuse base as described in claim 2, characterized in that, The base has a recessed hole in the middle, and a threaded hole is formed in the middle of the recessed hole.

4. The fuse base as described in claim 1, characterized in that, An electrical insulating pad is also provided between the conductive sheet and the base body, and the insulating pad is made of polytetrafluoroethylene material.

5. The fuse base as described in claim 1, characterized in that, The outer surface of the plug has multiple annular grooves recessed inward, and multiple anti-slip raised rubber rings are provided on the annular grooves. The anti-slip raised rubber rings abut against the inner wall of the plug hole.

6. The fuse base as described in claim 1, characterized in that, The elastic sheet for holding the conductive plate adopts a double-layer elastic sheet structure, including a main elastic layer and a secondary reinforcing elastic layer, wherein the secondary reinforcing elastic layer is made of high carbon steel plate.

7. A fuse, characterized in that, It includes a blade fuse and a fuse base as described in any one of claims 1 to 6 for engaging with the blade fuse.

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