A press-pack type fast acting fuse

Abstract

This utility model relates to the field of fuse technology and proposes a press-fit fast-acting fuse, including a housing, an electrode extending through the side of the housing, a hot-melt wire fixedly connected to the side of the electrode, and an electrode turning mechanism provided on the side of the housing. Through the cooperation of the internal components of the electrode turning mechanism, multi-angle adjustment of the electrode is achieved, significantly improving installation flexibility and adapting to complex spatial layouts. The symmetrical dual-electrode design optimizes current distribution and reduces the risk of localized overheating. Multiple screws in a circumferential array provide balanced clamping force, and the standardized design matching the diameter of the rotating plate to the housing ensures connection stability and compatibility with existing interfaces. The bolt connection method simplifies maintenance procedures and reduces downtime. The optimized electrode position design meets safety standards and effectively avoids the risk of accidental activation. This mechanism breaks through the limitations of traditional fuse installation, improving reliability and compatibility, and is particularly suitable for scenarios with high space and maintenance requirements.

Description

Technical Field

[0001] This utility model relates to the field of fuse technology, specifically to a press-fit fast fuse. Background Technology

[0002] A press-fit fast-acting fuse is an electrical device used for short-circuit protection. It typically consists of a through-type porcelain insulator, with upper and lower conductive plates sealed at both ends. Inside the insulator are supports, filler material, and several fusible elements. The fusible elements are generally made of pure silver and have a round orifice and narrow neck structure. It has advantages such as high breaking capacity, fast fusing speed, and good current-limiting characteristics, and is mainly used for short-circuit protection of semiconductor rectifier elements or rectifier devices.

[0003] According to a publicly disclosed press-fit fast-acting fuse (publication number: CN221927950U), it includes: a porcelain insulator extending vertically through the insulator and an upper conductive plate and a lower conductive plate sealed and connected to both ends of the insulator; a support column coaxial with the centerline of the insulator is provided inside the porcelain insulator, one end of the support column is fixedly connected to an inner contact blade located inside the insulator and on one side of the upper conductive plate, and the other end of the support column is fixedly connected to the lower conductive plate; it also includes a filler material disposed between the inner contact blade and the lower conductive plate, and several fusible elements welded between the inner contact blade and the lower conductive plate. This solves the problem of uneven pressure on the conductive plates of existing fuses, resulting in indentations.

[0004] However, the above-mentioned applications do not provide adequate protection for the electrodes and lack protective measures when the wires and electrodes are connected. Therefore, a press-fit fast fuse is proposed. Utility Model Content

[0005] This invention proposes a press-fit fast fuse, which solves the problems of poor protection effect on electrodes and lack of protection measures when wires and electrodes are connected in related technologies.

[0006] According to one aspect, at least one embodiment of the present invention provides a press-fit fast-acting fuse, comprising: a housing, an electrode extending through a side of the housing, a hot fuse wire fixedly connected to a side of the electrode, and an electrode turning mechanism provided on a side of the housing;

[0007] The electrode steering mechanism includes a rotating block, the side of which is rotatably connected to one end of the outer shell. The side of the outer shell is provided with a rotating groove, and the side of the rotating block is rotatably connected to the inside of the rotating groove. A rotating plate is fixedly connected to the side of the rotating block, a fixing plate is bolted to the side of the rotating plate, and screws are bolted to the side of the fixing plate.

[0008] For example, in at least one embodiment of the present invention, a press-fit fast fuse is provided, which further includes: two electrodes, rotating grooves, rotating blocks and rotating plates are provided, and they are symmetrical to each other along the vertical central axis of the shell. The symmetrical layout forms a torque balance, which offsets the stress caused by vibration or thermal expansion and contraction. The dual-electrode structure allows the current to flow into or out of the fuse evenly from both sides, avoiding current imbalance caused by unilateral force.

[0009] The screws are arranged in a circular array on the side of the fixing plate. The even distribution of multiple screws along the circumference creates uniform normal pressure on the rotating plate by the fixing plate, effectively preventing local loosening. The array layout provides clear guidance on the disassembly sequence and reduces the risk of misoperation.

[0010] The diameter of the rotating plate is equal to the side diameter of the outer shell. The equal diameter ensures that the load is evenly transmitted along the circumference of the outer shell when the bolt is connected, avoiding local stress concentration. The diameter of the rotating plate matches that of the outer shell, so that the electrode turning mechanism completely covers the end face of the outer shell and avoids radial protrusion.

[0011] The side of the electrode is located on the left side of the inner side of the housing, so that the position of the hot fuse inside the housing does not interfere excessively with the housing, and heat is prevented from being transferred to the housing when the hot fuse burns out.

[0012] According to another aspect, at least one embodiment of the present invention also provides a press-fit fast-acting fuse, comprising: a wire locking mechanism, the wire locking mechanism comprising a body, the side of the body being fixedly connected to the side of an electrode, a wire shaft being inserted into the side of the body, a wire opening being provided on the side of the electrode, a wire inlet being provided on the side of the body, a threaded rod being rotatably connected to the side of the body, a hexagonal rotating sleeve being fixedly connected to one end of the threaded rod, and a threaded sleeve being threadedly connected to the circumferential surface of the threaded rod.

[0013] For example, in at least one embodiment of the present invention, a press-fit fast fuse is provided, which further includes: two of the body, threaded rod, angular rotating sleeve and threaded sleeve, which are symmetrical to each other along the vertical central axis of the outer shell, so as to achieve the locking treatment of the wires at the positive and negative electrodes and reduce the trouble of disassembling the mechanism.

[0014] The diameter of the wire inlet is equal to the diameter of the wire conduit inside the machine body. The inner side of the wire inlet is located to the left of the wire inlet, making it easier and smoother for the wire to enter and eliminating stress concentration points caused by sudden changes in conduit diameter.

[0015] The circumferential surface of the threaded rod is located on the displacement trajectory of the guide shaft, and the side of the guide opening is located on the displacement trajectory of the threaded sleeve. The threaded rod constrains the displacement of the threaded sleeve to ensure coaxial and precise docking. The threaded sleeve is linked to the guide opening to achieve synchronous control of contact pressure and sealing, thereby improving the reliability and stability of the connection.

[0016] The diameter of the threaded sleeve is equal to the diameter of the wire opening, so that the wire can be completely captured by the threaded sleeve.

[0017] The working principle and beneficial effects of this utility model are as follows:

[0018] 1. This utility model achieves multi-angle electrode adjustment through the cooperation of components such as the rotating block, rotating plate, and fixed plate within the electrode steering mechanism, significantly improving installation flexibility and adapting to complex spatial layouts. The symmetrical dual-electrode design optimizes current distribution and reduces the risk of localized overheating. Multiple screws in a circumferential array provide balanced clamping force, and the standardized design matching the diameter of the rotating plate to the housing ensures connection stability and compatibility with existing interfaces. The bolted connection simplifies maintenance procedures and reduces downtime. The optimized electrode position design meets safety standards, effectively avoiding the risk of accidental activation. This mechanism overcomes the limitations of traditional fuse installation, improving reliability and compatibility, and is particularly suitable for scenarios with high space and maintenance requirements.

[0019] 2. In this utility model, the wire clamping mechanism utilizes the interplay of components such as the wire shaft, threaded rod, and threaded sleeve to reliably clamp the wire, effectively preventing loosening. The hexagonal rotating sleeve design facilitates tool operation and improves installation efficiency. The precise fit between the wire shaft and the wire opening ensures electrical connection stability and reduces contact resistance fluctuations. The rational layout of the inlet and outlet optimizes the wire path and avoids bending damage. This mechanism solves the problems of easy loosening and difficult operation in traditional connection methods through mechanical innovation, improving connection reliability and ease of maintenance. Attached Figure Description

[0020] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0021] Figure 1 This is a three-dimensional appearance structure diagram of the present utility model;

[0022] Figure 2 This is a cross-sectional three-dimensional appearance structural diagram of the rotating mechanism of this utility model;

[0023] Figure 3 This is a three-dimensional appearance structural diagram of the wire locking mechanism of this utility model;

[0024] Figure 4 This is a three-dimensional appearance structural diagram of the first cross-section of the wire locking mechanism of this utility model.

[0025] In the diagram: 1. Outer shell; 2. Electrode; 3. Hot melt wire; 4. Electrode turning mechanism; 41. Rotating block; 42. Rotating groove; 43. Rotating plate; 44. Fixing plate; 45. Screw; 5. Wire locking mechanism; 51. Body; 52. Wire shaft; 53. Wire inlet; 54. Wire inlet; 55. Threaded rod; 56. Hexagonal rotating sleeve; 57. Threaded sleeve. Detailed Implementation

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0027] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0028] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figures 1-4 As shown, it illustrates a press-fit fast fuse according to an embodiment of the present invention, comprising: a housing 1, an electrode 2 passing through the side of the housing 1, a hot fuse wire 3 fixedly connected to the side of the electrode 2, and an electrode turning mechanism 4 provided on the side of the housing 1.

[0031] The electrode steering mechanism 4 includes a rotating block 41, the side of the rotating block 41 is rotatably connected to one end of the outer shell 1, the side of the outer shell 1 is provided with a rotating groove 42, the side of the rotating block 41 is rotatably connected to the inside of the rotating groove 42, the side of the rotating block 41 is fixedly connected to a rotating plate 43, the side of the rotating plate 43 is bolted to a fixing plate 44, and the side of the fixing plate 44 is bolted to a screw 45.

[0032] In some examples, the number of electrodes 2, rotating grooves 42, rotating blocks 41 and rotating plates 43 are set to two, and they are symmetrical to each other along the vertical central axis of the outer shell 1. The symmetrical layout forms a torque balance, which offsets the stress caused by vibration or thermal expansion and contraction. The dual electrode 2 structure allows the current to flow into or out of the fuse evenly from both sides, avoiding the current imbalance caused by unilateral force.

[0033] The number of screws 45 is set to several and arranged in a circumferential array on the side of the fixing plate 44. By evenly distributing multiple screws 45 along the circumference, the fixing plate 44 generates uniform normal pressure on the rotating plate 43, effectively preventing local loosening. The array layout provides clear guidance on the disassembly sequence and reduces the risk of misoperation.

[0034] The diameter of the rotating plate 43 is equal to the side diameter of the outer shell 1. The equal diameter ensures that the load is evenly transmitted along the circumference of the outer shell 1 when the bolt is connected, avoiding local stress concentration. The diameter of the rotating plate 43 matches that of the outer shell 1, so that the electrode turning mechanism 4 completely covers the end face of the outer shell 1, avoiding radial protrusion.

[0035] The side of electrode 2 is located on the left side of the inner side of the outer casing 1, so that the position of the hot fuse 3 inside the outer casing 1 does not interfere excessively with the outer casing 1, and the heat is prevented from being transferred to the outer casing 1 when the hot fuse 3 burns out.

[0036] For example, such as Figures 1-4 As shown, the operator connects the hot fuse 3 into the circuit. The rotating block 41 is rotatably connected to the outer casing 1 through the rotating groove 42, driving the rotating plate 43, the fixed plate 44, and the electrode 2 to rotate and adjust their orientation. The symmetrical layout balances the torque and counteracts stress. Several screws 45 are arranged in a circumferential array to fasten the fixed plate 44, applying uniform pressure to prevent loosening. The dual-electrode 2 structure ensures uniform current flow in and out, improving reliability.

[0037] like Figures 1-4As shown, this invention illustrates a press-fit fast-acting fuse in another embodiment of the present invention. The technical solution is largely the same as that of Embodiment 1, so only the differences are described. The fast-acting fuse includes: a wire locking mechanism 5, comprising a body 51, with the side of the body 51 fixedly connected to the side of the electrode 2; a wire shaft 52 inserted into the side of the body 51; a wire inlet 53 on the side of the electrode 2; a wire inlet 54 on the side of the body 51; a threaded rod 55 rotatably connected to the side of the body 51; a hexagonal rotating sleeve 56 fixedly connected to one end of the threaded rod 55; and a threaded sleeve 57 threadedly connected to the circumferential surface of the threaded rod 55.

[0038] In some examples, the number of the body 51, threaded rod 55, hexagonal rotating sleeve 56 and threaded sleeve 57 is set to two, and they are symmetrical to each other along the vertical central axis of the outer shell 1, so as to achieve the locking treatment of the wires at the positive and negative electrodes and reduce the trouble of disassembling the mechanism.

[0039] The diameter of the wire inlet 53 is equal to the diameter of the wire conduit inside the body 51. The inner side of the wire inlet 54 is located to the left of the wire inlet 53, making it easier and smoother for the wire to enter and eliminating stress concentration points caused by sudden changes in the conduit diameter.

[0040] The circumferential surface of the threaded rod 55 is located on the displacement trajectory of the guide shaft 52, and the side of the guide opening 53 is located on the displacement trajectory of the threaded sleeve 57. The threaded rod 55 constrains the displacement of the threaded sleeve 57 to ensure coaxial and precise docking. The threaded sleeve 57 is linked with the guide opening 53 to achieve synchronous control of contact pressure and sealing, thereby improving the reliability and stability of the connection.

[0041] The diameter of the threaded sleeve 57 is equal to the diameter of the wire opening 53, so that the wire can be completely captured by the threaded sleeve 57.

[0042] For example, such as Figures 1-4 As shown, the worker inserts the wire into the inlet 54. When the wire reaches the depth of the inlet 54, the wire is guided into the wire outlet 53 by the wire shaft 52. The inlet 54 and the wire outlet 53 have the same diameter to optimize the wire path. When the wire shaft 52 reaches the side of the machine body 51, the worker rotates the hexagonal rotating sleeve 56 with an Allen wrench to drive the rotation of the threaded rod 55. This causes the threaded sleeve 57 to move along the threaded rod 55 and coaxially press the wire with the wire outlet 53. Through mechanical transmission and precise matching of structural dimensions, the wire and electrode 2 are firmly connected and reliably conductive.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A press-pack fast acting fuse, characterized by, Includes a housing (1), an electrode (2) passing through the side of the housing (1), a hot fuse (3) fixedly connected to the side of the electrode (2), and an electrode turning mechanism (4) provided on the side of the housing (1). The electrode steering mechanism (4) includes a rotating block (41), the side of the rotating block (41) is rotatably connected to one end of the outer shell (1), the side of the outer shell (1) is provided with a rotating groove (42), the side of the rotating block (41) is rotatably connected to the inside of the rotating groove (42), the side of the rotating block (41) is fixedly connected to a rotating plate (43), the side of the rotating plate (43) is bolted to a fixing plate (44), and the side of the fixing plate (44) is bolted to a screw (45).

2. A press-pack fast acting fuse according to claim 1, characterized in that The number of electrodes (2), rotating grooves (42), rotating blocks (41) and rotating plates (43) are two, and they are symmetrical to each other along the vertical central axis of the outer shell (1).

3. A press-pack fast acting fuse according to claim 2, characterised in that, The number of screws (45) is set to several, and they are arranged in a circumferential array on the side of the fixing plate (44).

4. A press-pack fast acting fuse according to claim 3, wherein, The diameter of the rotating plate (43) is equal to the side diameter of the outer shell (1).

5. A press-pack fast acting fuse according to claim 4, characterised in that, The side of the electrode (2) is located on the left side of the inner side of the outer casing (1).

6. A press-pack fast acting fuse according to claim 5, characterized in that, The electrode (2) is provided with a wire locking mechanism (5) on its side. The wire locking mechanism (5) includes a body (51). The side of the body (51) is fixedly connected to the side of the electrode (2). A wire shaft (52) is inserted into the side of the body (51). A wire opening (53) is opened on the side of the electrode (2). A wire inlet (54) is opened on the side of the body (51). A threaded rod (55) is rotatably connected to the side of the body (51). A hexagonal rotating sleeve (56) is fixedly connected to one end of the threaded rod (55). A threaded sleeve (57) is threadedly connected to the circumferential surface of the threaded rod (55).

7. A press-pack fast acting fuse according to claim 6, characterised in that, The number of the body (51), threaded rod (55), angular rotating sleeve (56) and threaded sleeve (57) is two, and they are symmetrical to each other along the vertical central axis of the outer shell (1).

8. A press-pack fast acting fuse according to claim 7, characterized in that The diameter of the wire inlet (53) is equal to the diameter of the wire conduit inside the body (51), and the inner side of the inlet (54) is located to the left of the wire inlet (53).

9. A press-pack fast acting fuse according to claim 8, characterized in that, The circumferential surface of the threaded rod (55) is located on the displacement trajectory of the guide shaft (52), and the side surface of the guide opening (53) is located on the displacement trajectory of the threaded sleeve (57).

10. A press-pack fast acting fuse according to claim 9, characterized in that The diameter of the threaded sleeve (57) is equal to the diameter of the wire opening (53).

Images