Fuse pedestal

Abstract

The utility model discloses a fuse base, which comprises a shell and a terminal assembly, two ends of the shell are provided with terminal installation cavities, the upper side of each terminal installation cavity is provided with a fastening hole, the outer side wall of each terminal installation cavity is provided with a wiring hole, and the terminal assembly comprises a wiring ring, a [-shaped compression ring, a fastening screw, a wiring part and a clamping ring. The positioning structure is characterized in that guide ribs are arranged on the side walls of the two sides of the mounting cavity and abut against the side face of the U-shaped pressing ring, and positioning blocks on the guide ribs are provided with arc-shaped positioning concave faces matched with the screw heads of the fastening screws. The structure can effectively prevent deviation of the [-shaped pressing ring and deflection of the screw head of the fastening screw, ensures uniform pressing force of a wire, improves wiring reliability and installation stability of the terminal assembly, reduces potential safety hazards, prolongs the service life, and provides guarantee for safe operation of a circuit.

Description

Technical Field

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

[0002] In the field of circuit protection for power systems and electrical equipment, fuses, as a key overcurrent protection device, are widely used in various power distribution lines and electrical equipment to prevent equipment damage or even safety accidents caused by circuit faults such as overload or short circuit. The fuse holder, as a supporting mounting component for the fuse, primarily functions to ensure a reliable connection between the fuse and the external circuit, and to provide stable mounting support for the fuse, ensuring its normal operation in the circuit.

[0003] Existing fuse bases typically include a housing and terminal assemblies. Terminal mounting cavities at both ends of the housing accommodate the terminal assemblies. External wires are fixedly connected to the wiring portion of the terminal assembly via fastening screws within fastening holes and a U-shaped clamping ring (e.g., a fuse base disclosed in application CN201820533450.0). However, in actual installation and use, these fuse bases present some significant problems. Specifically, when the U-shaped clamping ring is tightened with fastening screws to secure the wires, the lack of effective guiding and positioning structures within the terminal mounting cavity makes it prone to lateral displacement or tilting under stress. This displacement not only reduces the fit accuracy between the U-shaped clamping ring and the wiring portion, resulting in uneven distribution of clamping force on the wires and affecting wiring reliability, but may also cause poor wire contact, increased contact resistance, and potentially lead to localized overheating and other safety hazards.

[0004] Meanwhile, during the tightening process, the screw head also wobbles due to lack of positioning, further exacerbating the positional deviation of the "U"-shaped retaining ring and reducing the installation stability of the entire terminal assembly. Furthermore, with prolonged use or exposure to external vibrations, the misalignment of the "U"-shaped retaining ring may become increasingly severe, affecting not only the service life of the fuse base but also threatening the safe operation of the entire circuit.

[0005] Therefore, how to optimize the structure of the fuse base, especially by setting an effective guiding and positioning structure for the "U"-shaped pressure ring and fastening screws, in order to improve the installation stability and wiring reliability of the terminal assembly, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] To address the shortcomings of the prior art, this utility model provides a fuse base.

[0007] The technical solution adopted by the utility model is as follows: A fuse base includes a housing and a terminal assembly. Terminal mounting cavities are provided at both ends of the housing. A fastening hole is provided on the upper side of the terminal mounting cavity, and a wiring hole is provided on the outer side wall of the mounting cavity. The terminal assembly includes a wiring ring, a "C"-shaped pressing ring, a fastening screw, a wiring part, and a clamping ring. Guide ridges are provided on both side walls of the mounting cavity. The guide ridges are in contact with the side surface of the "C"-shaped pressing ring. A positioning block is provided on the guide ridge, and an arc-shaped positioning concave surface adapted to the screw head of the fastening screw is provided on the positioning block.

[0008] Further, there are two guide ridges, which are arranged in parallel.

[0009] Further, a side abutting portion abutting against the side wall of the wiring ring and a lower abutting portion abutting against the bottom wall of the wiring ring extend from the bottom of the guide ridge. A ventilation gap is left between the lower abutting portion and the bottom wall of the wiring ring.

[0010] Further, one end of the "C"-shaped pressing ring extends into the wiring ring and abuts against the bottom of the fastening screw. One end of the fastening screw is threadedly connected to the screw hole on the wiring ring, and the other end extends out of the through hole on the upper side of the "C"-shaped pressing ring.

[0011] Further, the wiring part includes a connecting piece connected to the wiring ring and a "U"-shaped part integrally formed at one end of the connecting piece. The clamping ring clamps outside the "U"-shaped part. Side positioning parts and bottom positioning parts are provided on the outer wall and the bottom wall of the "U"-shaped part. A positioning groove for positioning the clamping ring is provided in the middle of the side positioning part and the bottom positioning part.

[0012] Further, clamping grooves one and two for the connecting piece to be inserted into are provided on the housing. A让位槽 for the clamping ring and the bottom positioning part to make way is provided on the step between the clamping groove one and the clamping groove two.

[0013] Further, a plurality of convex strips are provided at intervals on the end faces of the connecting piece and the "C"-shaped pressing ring facing each other.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. By providing guide ridges on both side walls (the side walls of the upper shell and the bottom shell) of the mounting cavity and making the guide ridges abut against the side surface of the "C"-shaped pressing ring, an effective guiding and limiting effect can be exerted on the "C"-shaped pressing ring. During the process of tightening the fastening screw, the "C"-shaped pressing ring will not shift or tilt, ensuring that a good matching relationship is always maintained between it and the wiring part, making the pressing force of the wire evenly distributed, significantly improving the reliability of wiring, and avoiding safety hazards such as an increase in contact resistance and local heating caused by poor contact.

[0016] It should be noted that there is an unclear symbol "让位槽" in the original text. I have translated it as "让位槽" for now. You may need to clarify its specific meaning for a more accurate translation.2. The positioning block and its arc-shaped positioning concave surface on the guide ridge are adapted to the screw head of the fastening screw, which can provide a stable positioning effect for the screw head. When tightening the fastening screw, the screw head will not wobble, further ensuring the stability of the force on the "U"-shaped pressure ring, avoiding the problem of the "U"-shaped pressure ring position deviation being aggravated by the screw head wobble, and greatly improving the stability of the entire terminal assembly installation.

[0017] 3. The above structural design can maintain the stable position of the "U"-shaped pressure ring and fastening screw even after long-term use or when affected by external vibration, reducing the probability of failure caused by structural displacement, extending the service life of the fuse base, and providing a strong guarantee for the safe and reliable operation of the entire circuit.

[0018] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 3 This is a front view of the interior of this utility model.

[0023] Figure 4 This is a schematic diagram of the interior of the outer casing.

[0024] Figure 5 This is a schematic diagram of the terminal assembly.

[0025] Figure 6 This is a cross-sectional schematic diagram of the terminal assembly.

[0026] Figure 1-6 In the middle: 1. Outer shell; 2. Terminal mounting cavity; 3. Fastening hole; 4. Wiring hole; 5. Wiring ring; 6. "U"-shaped pressure ring; 7. Fastening screw; 8. Wiring part; 9. Clamping ring; 10. Guide protrusion; 11. Positioning block; 12. Arc-shaped positioning concave surface; 13. Side abutment part; 14. Lower abutment part; 15. Vent gap; 16. Screw hole; 17. Through hole; 18. Connecting piece; 19. "U"-shaped part; 20. Side positioning part; 21. Bottom positioning part; 22. Positioning groove; 23. Clamping groove one; 24. Clamping groove two; 25. Relief groove; 26. Protrusion. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] This utility model provides a fuse base.

[0030] In this embodiment, refer to Figure 1-6 The fuse base includes a housing 1 and a terminal assembly. Terminal mounting cavities 2 are provided at both ends of the housing. Fastening holes 3 are provided on the upper side of the terminal mounting cavities. Wiring holes 4 are provided on the outer sidewall of the mounting cavities. The terminal assembly includes a wiring ring 5, a U-shaped pressure ring 6, a fastening screw 7, a wiring part 8, and a clamping ring 9. Guide protrusions 10 are provided on both sidewalls of the mounting cavities. The guide protrusions 10 abut against the side of the U-shaped pressure ring. A positioning block 11 is provided on the guide protrusions 10. An arc-shaped positioning concave surface 12 that matches the screw head of the fastening screw is provided on the positioning block 11.

[0031] In the above technical solution, guide ridges are provided on both side walls of the mounting cavity, which abut against the sides of the "U"-shaped pressure ring, forming a lateral constraint on the "U"-shaped pressure ring. The positioning blocks on the guide ridges are adapted to the screw heads of the fastening screws through arc-shaped positioning concave surfaces, limiting the wobble of the screw heads. This effectively prevents the "U"-shaped pressure ring from shifting or tilting laterally during the tightening and up-and-down movement of the fastening screws, ensuring precise fit with the wiring part, uniform distribution of wire clamping force, improving wiring reliability, and avoiding safety hazards caused by poor contact; at the same time, it stabilizes the fastening screws, further ensuring the installation stability of the terminal assembly.

[0032] Specifically, there are two guide ridges, which are arranged in parallel.

[0033] In this embodiment, two parallel guide ridges are provided to guide and limit the "U"-shaped pressure ring from both sides. Compared with a single guide ridge, it can apply more even constraint to the "U"-shaped pressure ring, further enhancing the guiding accuracy and limiting effect of the "U"-shaped pressure ring, reducing the possibility of its deviation or tilting, and improving structural stability.

[0034] Specifically, a side abutting portion 13 that abuts against the side wall of the wiring ring and a lower abutting portion 14 that abuts against the bottom wall of the wiring ring extend from the bottom of the guiding rib. An air permeable gap 15 is left between the lower abutting portion and the bottom wall of the wiring ring.

[0035] In this embodiment, a side abutting portion that abuts against the side wall of the wiring ring and a lower abutting portion that abuts against the bottom wall of the wiring ring extend from the bottom of the guiding rib, and an air permeable gap is left between the lower abutting portion and the bottom wall of the wiring ring. The side abutting portion positions the wiring ring from the side, the lower abutting portion supports the wiring ring from the bottom, and the air permeable gap provides a channel for heat dissipation. The wiring ring is fixed in multiple directions, improving the stability of the installation of the wiring ring.

[0036] Specifically, one end of the "C"-shaped pressing ring extends into the wiring ring and abuts against the bottom of the fastening screw. One end of the fastening screw is threadedly connected to a screw hole 16 on the wiring ring, and the other end extends out of a through hole 17 on the upper side of the "C"-shaped pressing ring.

[0037] In this embodiment, one end of the "C"-shaped pressing ring extends into the wiring ring and abuts against the bottom of the fastening screw. One end of the fastening screw is threadedly connected to a screw hole on the wiring ring, and the other end extends out of a through hole on the upper side of the "C"-shaped pressing ring. Axial movement of the fastening screw is achieved through threaded connection, and then the "C"-shaped pressing ring is pushed to press the wire.

[0038] Specifically, the wiring portion includes a connecting piece 18 connected to the wiring ring and a "U"-shaped portion 19 integrally formed at one end of the connecting piece 18. The clamping ring clamps outside the "U"-shaped portion. Side positioning portions 20 and bottom positioning portions 21 are provided on the outer wall and bottom wall of the "U"-shaped portion, and positioning grooves 22 for positioning the clamping ring are provided in the middle of the side positioning portions and bottom positioning portions.

[0039] In this embodiment, side positioning portions and bottom positioning portions are provided on the outer wall and bottom wall of the "U"-shaped portion of the wiring portion, and the positioning grooves in the middle thereof are for the clamping ring to be clamped and positioned. The clamping ring is closely fitted with the "U"-shaped portion through the positioning groove, restricting the installation position of the "U"-shaped portion.

[0040] Specifically, a first clamping groove 23 and a second clamping groove 24 for the connecting piece to be inserted are provided on the outer shell. A relief groove 25 for making way for the clamping ring and the bottom positioning portion is provided on the step between the first clamping groove 23 and the second clamping groove 24.

[0041] In this embodiment, the first clamping groove and the second clamping groove on the outer shell are for the connecting piece to be inserted, horizontally positioning the connecting piece; the relief groove on the step between the first clamping groove and the second clamping groove provides space for the clamping ring and the bottom positioning portion, preventing interference with the outer shell.

[0042] Specifically, a plurality of convex strips 26 are provided at intervals on the end face of the connecting piece facing the "C"-shaped pressing ring.

[0043] In this embodiment, a plurality of convex strips are arranged at intervals on the end face of the connecting piece facing the "C"-shaped pressing ring. When the "C"-shaped pressing ring presses the wire, the convex strips increase the contact points and frictional force with the wire.

[0044] Dear technicians, please note that although the present utility model has been described according to the above specific embodiments, the idea of the present utility model is not limited to this utility model only. Any modification using the idea of the present utility model will be included in the protection scope of this patent right.

Claims

1. A fuse base, comprising a housing and a terminal assembly, wherein terminal mounting cavities are provided at both ends of the housing, a fastening hole is provided on the upper side of the terminal mounting cavity, and a wiring hole is provided on the outer sidewall of the mounting cavity; the terminal assembly includes a wiring ring, a U-shaped pressure ring, a fastening screw, a wiring portion, and a clamping ring, characterized in that: On both side walls of the installation cavity, there are guiding convex ridges, which are in contact with the side surfaces of the "C"-shaped pressing ring. On the guiding convex ridges, there are positioning blocks, and on the positioning blocks, there are arc-shaped positioning concave surfaces adapted to the screw heads of the fastening screws.

2. The fuse base according to claim 1, characterized in that: There are two guiding convex ridges, which are arranged in parallel.

3. The fuse base according to claim 1, characterized in that: At the bottom of the guiding convex ridges, there are side abutting parts extending to abut against the side wall of the wiring ring and lower abutting parts extending to abut against the bottom wall of the wiring ring. There is a ventilation gap between the lower abutting parts and the bottom wall of the wiring ring.

4. The fuse base according to claim 1, characterized in that: One end of the "C"-shaped pressing ring extends into the wiring ring and abuts against the bottom of the fastening screw. One end of the fastening screw is threadedly connected to the screw hole on the wiring ring, and the other end extends out from the through hole on the upper side of the "C"-shaped pressing ring.

5. The fuse base according to claim 1 or 4, characterized in that: The wiring part includes a connecting piece connected to the wiring ring and a "U"-shaped part integrally formed at one end of the connecting piece. The clamping ring is clamped outside the "U"-shaped part. On the outer wall and bottom wall of the "U"-shaped part, there are side positioning parts and bottom positioning parts, and in the middle of the side positioning parts and bottom positioning parts, there are positioning grooves for positioning the clamping ring.

6. The fuse base according to claim 5, characterized in that: On the outer shell, there are clamping grooves one and two for the connecting piece to be inserted into. On the step between the clamping grooves one and two, there is a relief groove for the clamping ring and the bottom positioning part to make way.

7. The fuse base according to claim 6, characterized in that: On the end faces of the connecting piece and the "C"-shaped pressing ring facing each other, there are a number of convex strips arranged at intervals.

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