A fast replaceable fuse

Abstract

The utility model discloses a quick replacement's fuse, this quick replacement's fuse includes the fuse tube, the contact of setting in the both ends of fuse tube and with the busbar connection's conducting board, its characterized in that: the contact is equipped with at least one locking hole, the conducting board is equipped with the plug -in space for accommodating the contact, one side of plug -in space is equipped with the telescopic locking piece, the locking piece is equipped with with locking projection portion of cooperation of locking hole, through the guide structure and guide the contact insertion, when locking hole and convex portion are in alignment, spring drive locking convex portion embeds locking hole and forms mechanical interlock, the locking mechanism and the continued pressure of spring cooperate, ensure maintaining low contact resistance and stable conduction under the vibration or high temperature working condition, this mounting structure is simplified into single linear insertion action, and the disassembly only needs external operation to remove the constraint, shortens the replacement period, avoids the risk such as the thread slip of traditional thread fastening because of repeated disassembly and assembly, torque control inconsistency and connection surface oxidation.

Description

Technical Field

[0001] This utility model relates to the technical field of short-circuit protection devices for semiconductor equipment, and in particular to a quick-replacement fuse. Background Technology

[0002] As a current protection device, the core function of a fuse is to melt the fusible element when a short circuit or overcurrent fault occurs in the circuit, and the current value exceeds a preset threshold and persists for a specific time. This melts the fusible element due to the Joule heat generated by the current flowing through it, thereby cutting off the circuit and protecting downstream electrical equipment from damage. Given its simple structure, reliable operation, and strong breaking capacity, fuses are widely used in high and low voltage power distribution networks, industrial control systems, and various electrical equipment, serving as a fundamental and crucial circuit protection component.

[0003] Traditional fuses typically consist of a fuse element, which comprises a fusible tube and contacts fixed at both ends. To accommodate high-current applications, the contacts are often designed as busbar mounting slots, directly connected to the main circuit's busbar via bolts. However, this connection method reveals problems such as cumbersome operation procedures and time-consuming installation and disassembly when fuses are frequently replaced as consumable parts. Operators need to use specialized tools to precisely control the torque of multiple fastening bolts, which not only reduces maintenance efficiency and prolongs equipment downtime, but also further increases the difficulty of replacement work in confined spaces or emergency repair environments, affecting the rapid restoration and continuous stable operation of the power system. In addition, repeated mechanical tightening and disassembly may lead to wear on the busbar threads or poor contact at the connection surfaces, creating potential hazards for long-term equipment operation. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology design and to provide a product that has a reliable connection, improves transmission efficiency, and prevents slippage.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A quick-replacement fuse includes a fuse tube, contacts disposed at both ends of the fuse tube, and a conductive plate connected to a busbar. The contact is characterized in that: each contact has at least one locking hole; the conductive plate has an insertion space for accommodating the contact; one side of the insertion space has a retractable locking member; the locking member has a locking protrusion that mates with the locking hole; a spring is provided between the locking member and the conductive plate, acting on the locking member to cause the locking protrusion to have a tendency to embed into the locking hole.

[0007] Preferably, the back plate of the conductive plate is provided with a connecting part, the connecting part is provided with mounting holes for connecting to the busbar, and a plurality of reinforcing ribs are provided between the connecting part and the conductive plate.

[0008] Preferably, a first guide surface is provided at the entrance of the insertion space to guide the insertion of the contact, so that the locking hole is aligned with the locking protrusion.

[0009] Preferably, the locking member is provided with a second guide surface. When the contact is inserted, the contact contacts the second guide surface and pushes the locking member to compress the spring. The locking protrusion is provided with a third guide surface that is in contact with the second guide surface.

[0010] Preferably, one side of the insertion space is provided with a relief groove for accommodating the locking member, the relief groove is provided with a through hole, and one end of the through hole is provided with a recessed groove.

[0011] Preferably, the locking member has an operating member that passes through a through hole, the outer wall of the operating member is provided with an insulating sleeve, and the locking member has a countersunk hole for accommodating a spring.

[0012] Preferably, the contacts are further provided with first guide surfaces that mate with the first guide surface on both sides, and second guide surfaces that mate with the second guide surface and the third guide surface on both sides.

[0013] Beneficial effects:

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

[0015] This invention achieves precise contact insertion through a guide structure. During the insertion stroke, the contact drives the locking element to compress the spring and store energy. When the locking hole on the contact coincides with the protrusion on the locking element, the spring releases energy, driving the locking protrusion to embed into the locking hole, thus forming a mechanical interlock. This locking mechanism, in conjunction with the continuous clamping force provided by the spring, ensures that the contact and the conductive plate maintain low contact resistance and stable electrical conduction even under conditions such as vibration or high temperature. This design simplifies the installation process to a single linear insertion action. During disassembly, only an external operating force needs to be applied to the locking element to release the mechanical constraint, thereby shortening the replacement cycle of the fuse and avoiding potential risks such as thread stripping, inconsistent torque control, and oxidation of the connection surface caused by repeated disassembly and assembly in traditional threaded fastening methods. Attached Figure Description

[0016] Figure 1 This is a front view of the installation of a quick-replacement fuse according to this utility model;

[0017] Figure 2 This is a front view of a quick-replacement fuse according to the present invention.

[0018] Figure 3 This is a partial cross-sectional view taken from below during the installation of a quick-replacement fuse according to this utility model.

[0019] Figure 4 This is a schematic diagram of the conductive plate of a quick-replacement fuse according to the present invention.

[0020] Figure 5 This is a side cross-sectional view of the installation structure of a quick-replacement fuse according to this utility model.

[0021] The correspondence between the labels and component names in the attached figures is as follows:

[0022] Reference numerals: 1. Fusible tube; 2. Contact; 3. Conductive plate; 4. Locking element; 5. Spring; 6. Operating element; 7. Insulating sleeve; 21. Locking hole; 22. First guide surface; 23. Second guide surface; 31. Insertion space; 32. Connecting part; 33. Mounting hole; 34. Reinforcing rib; 35. Relief groove; 36. Through hole; 37. Countersunk groove; 311. First guide surface; 41. Locking protrusion; 42. Second guide surface; 43. Third guide surface; 44. Countersunk hole. Detailed Implementation

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

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0026] Reference example Figures 1 to 5A quick-replacement fuse includes a fuse tube 1, contacts 2 disposed at both ends of the fuse tube 1, and a conductive plate 3 connected to a busbar. The contacts 2 are provided with at least one locking hole 21. The conductive plate 3 is provided with an insertion space 31 for accommodating the contacts 2. A retractable locking member 4 is provided on one side of the insertion space 31. The locking member 4 is provided with a locking protrusion 41 that cooperates with the locking hole 21. A spring 5 is provided between the locking member 4 and the conductive plate 3 and acts on the locking member 4, so that the locking protrusion 41 has a tendency to be inserted into the locking hole 21.

[0027] The precise insertion of contact 2 is achieved through a guide structure. During the insertion stroke, contact 2 drives locking member 4 to compress spring 5 and store energy. When the locking hole 21 on contact 2 coincides with the protrusion on locking member 4, spring 5 releases energy, driving locking protrusion 41 to embed into locking hole 21, forming a mechanical interlock. This locking mechanism works in conjunction with the continuous clamping force provided by spring 5 to ensure that low contact resistance and stable electrical conduction are maintained between contact 2 and conductive plate 3 under conditions such as vibration or high temperature. This design simplifies the installation process to a single linear insertion action. When disassembling, only external operating force needs to be applied to locking member 4 to release the mechanical constraint, thereby shortening the replacement cycle of fuse and avoiding potential risks such as thread stripping, inconsistent torque control, and oxidation of connection surface caused by repeated disassembly and assembly in traditional threaded fastening methods.

[0028] It is worth mentioning that the back plate of the conductive plate 3 is provided with a connecting part 32, the connecting part 32 is provided with a mounting hole 33 for connecting with the busbar, and a plurality of reinforcing ribs 34 are provided between the connecting part 32 and the conductive plate 3. The reinforcing ribs 34 enhance the structural strength and bending stiffness of the connecting part 32 and the conductive plate 3. When the fuse is subjected to the huge electrodynamic force generated by the short circuit current or when the equipment vibrates, this structure can effectively resist the mechanical stress at the connection between the conductive plate 3 and the busbar, and prevent it from deforming or breaking.

[0029] It is worth mentioning that a first guide surface 311 is provided at the entrance of the insertion space 31 to guide the insertion of the contact 2, so that the locking hole 21 is aligned with the locking protrusion 41. The guide surface enables automatic correction in the initial stage of the insertion of the contact 2, guiding the contact 2 to enter along a predetermined trajectory. This ensures that the locking hole 21 on the contact 2 can be precisely aligned with the locking protrusion 41 on the locking member 4, and reduces the precision requirements of the installation operation. Even in environments with limited visibility or narrow space, it can achieve fast and accurate blind insertion, improve installation efficiency and success rate, and is a prerequisite for ensuring the effectiveness of subsequent mechanical locking and electrical connection.

[0030] It is worth mentioning that the locking member 4 is provided with a second guide surface 42. When the contact 2 is inserted, the contact 2 contacts the second guide surface 42 and pushes the locking member 4 to compress the spring 5. The locking protrusion 41 is provided with a third guide surface 43 that is in contact with the second guide surface 42. By setting the second guide surface 42 and the third guide surface 43 on the locking member 4, a smooth inclined transition system is formed. When the contact 2 is inserted, its end first contacts the second guide surface 42, which efficiently decomposes the axial insertion force into a radial force that drives the locking member 4 to retract. The process is smooth and without jamming. The third guide surface 43 then further guides the locking member 4 to smoothly retract and reset, so that the locking protrusion 41 is accurately embedded in the locking hole 21. This multi-stage guide design significantly reduces the force required for insertion operation, reduces mechanical wear between components, and improves the service life and smoothness of operation of the entire locking mechanism.

[0031] It is worth mentioning that a relief groove 35 for accommodating the locking member 4 is provided on one side of the insertion space 31. The relief groove 35 is provided with a through hole 36, and a recessed groove 37 is provided at one end of the through hole 36. The relief groove 35 provides precise movement guidance and accommodating space for the locking member 4, restricting its degree of freedom in the compression and reset process, preventing it from deflecting or jamming, and ensuring the reliability of the locking action. The through hole 36 provides an active channel for the operating member 6, while the recessed groove 37 at one end of the through hole 36 provides accommodating space for the insulating sleeve 7.

[0032] It is worth mentioning that the locking component 4 is provided with an operating component 6, which passes through the through hole 36. The outer wall of the operating component 6 is provided with an insulating sleeve 7. The locking component 4 is provided with a countersunk hole 44 to accommodate the spring 5. The operating component 6 provides a direct force application point for the unlocking action, making the disassembly process convenient and controllable. The insulating sleeve 7 prevents the operator from directly contacting the operating component 6, which has conductive properties, ensuring their own safety and preventing electric shock. This ensures operational safety. At the same time, the countersunk hole 44 increases the accommodating space of the spring 5, preventing the spring 5 from being over-compressed due to the inward shrinkage of the locking component 4, thus preventing it from losing its elastic energy release.

[0033] It is worth mentioning that the contact 2 is also provided with a first guide surface 22 on both sides to cooperate with the first guide surface 311, and a second guide surface 23 on both sides to cooperate with the second guide surface 42 and the third guide surface 43. Through the first guide surface 22 and the second guide surface 23, the contact 2 and the conductive plate 3 form a multi-point, linear continuous guide during the insertion process, which further improves the smoothness and alignment accuracy of the insertion and minimizes the insertion resistance.

[0034] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A quick-replacement fuse, comprising a fuse tube (1), contacts (2) disposed at both ends of the fuse tube (1), and a conductive plate (3) connected to a busbar, characterized in that: The contact (2) is provided with at least one locking hole (21), and the conductive plate (3) is provided with a plug-in space (31) for accommodating the contact (2). A retractable locking member (4) is provided on one side of the plug-in space (31). The locking member (4) is provided with a locking protrusion (41) that cooperates with the locking hole (21). A spring (5) is provided between the locking member (4) and the conductive plate (3) and acts on the locking member (4) so ​​that the locking protrusion (41) has a tendency to be embedded in the locking hole (21).

2. The quick-replacement fuse according to claim 1, characterized in that: The back plate of the conductive plate (3) is provided with a connecting part (32), the connecting part (32) is provided with a mounting hole (33) for connecting with the busbar, and a plurality of reinforcing ribs (34) are provided between the connecting part (32) and the conductive plate (3).

3. The quick-replacement fuse according to claim 1, characterized in that: The insertion space (31) has a first guide surface (311) at the entrance to guide the contact (2) to be inserted so that the locking hole (21) is aligned with the locking protrusion (41).

4. The quick-replacement fuse according to claim 3, characterized in that: The locking member (4) is provided with a second guide surface (42). When the contact (2) is inserted, the contact (2) contacts the second guide surface (42) and pushes the locking member (4) to compress the spring (5). The locking protrusion (41) is provided with a third guide surface (43) that is in contact with the second guide surface (42).

5. The quick-replacement fuse according to claim 1, characterized in that: The insertion space (31) has a relief groove (35) on one side to accommodate the locking member (4), the relief groove (35) has a through hole (36), and one end of the through hole (36) has a recess (37).

6. The quick-replacement fuse according to claim 5, characterized in that: The locking member (4) is provided with an operating member (6) that passes through a through hole (36). The outer wall of the operating member (6) is provided with an insulating sleeve (7). The locking member (4) is provided with a countersunk hole (44) for accommodating a spring (5).

7. The quick-replacement fuse according to claim 4, characterized in that: The contact (2) is provided with a first guide surface (22) on both sides to cooperate with the first guide surface (311), and a second guide surface (23) on both sides to cooperate with the second guide surface (42) and the third guide surface (43).

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