A fuse box

Abstract

The application relates to a fuse box, relates to the technical field of electrical protection, and comprises a fuse tube, two oppositely clamped and fixed fixing sleeves, two groups of wiring assemblies for connecting external cables and the fuse tube, installation cavities for inserting the fuse tube are formed in the mutually close end openings of the two fixing sleeves, limiting cavities for installing and placing the wiring assemblies are formed in the mutually far end openings of the two fixing sleeves, and the installation cavities and the limiting cavities are communicated; in the assembling process of the fuse box, the wiring assemblies are connected with the corresponding external cables in advance, the wiring assemblies are fixedly inserted into the limiting cavities in the corresponding fixing sleeves, one end of the fuse tube is then inserted into the installation cavity of one of the fixing sleeves, the inner end of the fuse tube is connected with the wiring assembly in the limiting cavity, and finally, the two fixing sleeves are inserted and fixed; in the process, no additional screws are needed for fastening, so that the assembling efficiency of the fuse box is improved.

Description

Technical Field

[0001] This application relates to the technical field of electrical protection, and in particular to a fuse box. Background Technology

[0002] With the rapid development and widespread adoption of electric technology, electric bicycles have become an indispensable green mode of transportation in modern society. However, the surge in the use of electric bicycles has also brought to the forefront the safety issues of their electrical systems, posing a pressing technical challenge. Particularly in core components such as the charging circuit, ACC (Accessory Control Circuit), and low-current discharge protection, abnormal current or short circuits in the electrical system can directly threaten the safety of the vehicle and its users, and may even lead to catastrophic consequences such as fires or explosions.

[0003] To effectively address this safety hazard, the fuse box, as a key component of electrical protection, plays a crucial role in the overall electrical system of electric vehicles. In scenarios such as ACC circuits, charging circuits, and low-current discharge protection, the fuse box can quickly respond to circuit anomalies and disconnect the faulty circuit by blowing the fuse, thereby preventing the accident from escalating.

[0004] However, in traditional technologies, fuse box designs for electric bicycles often suffer from low assembly efficiency. Specifically, the assembly processes between the housing and cover, the fuse holder and housing, and the fuse and fuse holder are complex, relying on fasteners such as screws for secure connections. This not only requires operators to use specific tools for tightening but also to ensure that the screw holes are aligned correctly, significantly increasing the time cost and operational difficulty of the assembly process, impacting overall production efficiency, and leaving room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a fuse box that solves the problem of low assembly efficiency of fuse boxes in the aforementioned related technologies.

[0006] The fuse box provided in this application adopts the following technical solution:

[0007] A fuse box includes a fuse tube, two fixed sleeves that are snapped together, and two sets of wiring assemblies for connecting external cables and the fuse tube. The openings at the ends of the two fixed sleeves that are close to each other are mounting cavities for inserting the fuse tube, and the openings at the ends of the two fixed sleeves that are far apart from each other are limiting cavities for installing the wiring assemblies. The mounting cavities and the limiting cavities are connected.

[0008] By adopting the above technical solution, during the fuse box assembly process, the wiring assembly is pre-connected to the corresponding external cable, and then the wiring assembly is fixedly inserted into the limiting cavity of the corresponding fixing sleeve. Then, one end of the fuse tube is inserted into the mounting cavity of one of the fixing sleeves, and the inner end of the fuse tube is connected to the wiring assembly in the limiting cavity. Finally, the two fixing sleeves are inserted and fixed, and the outer end of the fuse tube is inserted into the other fixing sleeve and connected to another wiring assembly. This allows the fuse box to be assembled and applied without the need for additional screws for tightening, thereby improving the assembly efficiency of the fuse box.

[0009] Optionally, a fixing protrusion ring is fixedly provided on the outer periphery of the two fixed sleeves that are close to each other. A plurality of positioning plates are evenly distributed on the side of the fixing protrusion ring near the opening of the fixed sleeve. A positioning slot is opened on the outer periphery of the fixing protrusion ring between adjacent positioning plates. The plurality of positioning slots are evenly distributed around the axis of the fixed sleeve. A trapezoidal protrusion is fixedly provided on the inner wall of the positioning slot. A fixing through groove is opened on the positioning plate. After the two fixed sleeves are rotated in a staggered manner, the positioning plate on one fixed sleeve is inserted into the positioning slot on the other, and the trapezoidal protrusion on the positioning slot is inserted into the fixing through groove on the positioning plate.

[0010] By adopting the above technical solution, during the clamping process of the two fixed sleeves, the two fixed sleeves are first rotated in a staggered manner, so that the positioning plate on one fixed sleeve is inserted into the positioning slot on the other. The trapezoidal protrusion on the positioning slot is inserted into the fixing through groove on the positioning plate along its own inclined surface, so that the two fixed sleeves are clamped and fixed to each other. Moreover, since the positioning plate and the positioning slot are evenly distributed, the clamping of the two fixed sleeves is more tight and firm.

[0011] Optionally, the opposite two sides of the trapezoidal protrusion are guide arc surfaces, and the arc length corresponding to the positioning slot is not less than twice the width of the positioning insert; the positioning insert on one fixed sleeve can be inserted into the positioning slot on another fixed sleeve and rotate around the axis of the fixed sleeve.

[0012] By adopting the above technical solution, when the two fixed sleeves are inserted into each other, the operator can hold the two fixed sleeves with both hands and rotate them in opposite directions, so that the trapezoidal protrusion that is stuck in the fixed through groove slides out of the original fixed through groove along the guide arc surface, which can quickly unlock the two stuck fixed sleeves and improve the unlocking efficiency after the two fixed sleeves are inserted.

[0013] Optionally, a limiting protrusion for limiting the fuse tube is fixed on the inner wall of the mounting cavity, and a limiting retaining ring is fixed on the inner wall of the limiting cavity around the axis of the fixing sleeve; the sides of the limiting protrusion and the limiting retaining ring that are close to each other together limit and fix the wiring assembly in the limiting cavity.

[0014] By adopting the above technical solution, the setting of the limiting protrusion realizes the limiting of the fuse tube inserted into the installation cavity, so that the inner side of the limiting protrusion abuts against the outer peripheral surface of the fuse tube, thereby improving the installation stability of the fuse tube in the installation cavity; at the same time, the limiting protrusion and the limiting retaining ring are set together to realize the limiting and fixing of the wiring assembly in the limiting cavity.

[0015] Optionally, the wiring assembly includes a plug-in portion connected to the end of the fuse tube, a connecting portion connected to an external cable, and a baffle for connecting the two; a plurality of locking buckles are fixedly provided on the outer periphery of the plug-in portion near the connecting portion, the plug-in portion is fixedly engaged between the limiting ring and the limiting protrusion, and the locking buckles can abut against the side of the limiting ring facing the limiting protrusion.

[0016] By adopting the above technical solution, when the plug is fixedly inserted between the limiting ring and the limiting protrusion, the side edge of the plug away from the connecting part abuts against the side of the limiting protrusion, and the locking buckle abuts against the side of the limiting ring facing the limiting protrusion, thereby achieving the locking and limiting of the plug.

[0017] Optionally, the plug and the connecting part are offset, and the side of the baffle facing the plug can abut against the end of the fuse tube inserted into the plug.

[0018] By adopting the above technical solution, when the fuse tube is inserted into the cavity of the insertion part, the side of the baffle facing the insertion part can be pressed against the end of the fuse tube in the insertion part, thereby achieving further limiting and fixing of the fuse tube and reducing the possibility of the fuse tube becoming loose during installation.

[0019] Optionally, the connecting part is symmetrically fixed with bending plates, and a plurality of abutting protrusions are fixed on the sides of the two bending plates that are close to each other.

[0020] By adopting the above technical solution, due to the setting of the bending plate and the abutting protrusion on the bending plate, when the external cable is connected to the connection part, the insulation of the cable end is stripped off in advance, and then the exposed core wire is placed between the two bending plates. Then, the bending plate is bent and pressed and fixed to the outside of the exposed core wire with a tool, so that the abutting protrusion is pressed tightly against the exposed core wire.

[0021] Optionally, the limiting cavity is provided with a sealing sleeve installed on the outer periphery of the external cable, and a plurality of waterproof protrusions that abut against the inner wall of the limiting cavity are fixed on the outer periphery of the sealing sleeve; a connecting protrusion is fixed on the side of the sealing sleeve facing the installation cavity, and a connecting ring groove is opened on the outer periphery of the connecting protrusion; a connecting foot for connecting the sealing sleeve is fixed on the side of the connecting part away from the insertion part, and the connecting foot is fixedly locked in the connecting ring groove.

[0022] By adopting the above technical solution, during the assembly of the fuse box, the sealing sleeve is pre-installed on the outer periphery of the external cable, the insulation of the end of the external cable passing through the sealing sleeve is removed and pressed and fixed with the connecting part, and then the plug part is installed inside the limiting cavity. At the same time, the waterproof protrusion on the sealing sleeve is pressed against the inner wall of the limiting cavity to improve its waterproof performance. The two connecting feet are bent and fixed in the connecting ring groove to realize the installation and fixation of the wiring assembly and the sealing sleeve.

[0023] Optionally, a sealing gasket is fitted on the outer periphery of the fuse tube, and the sides of the fixing sleeves that are close to each other abut against the sides of the sealing gasket.

[0024] By adopting the above technical solution, due to the setting of the sealing gasket, after the fuse box is installed, the sides of the fixed sleeves that are close to each other are pressed against the two sides of the sealing gasket, thereby reducing the possibility of external moisture seeping into the interior from the connection between the two fixed sleeves and improving its waterproof performance.

[0025] Optionally, a plurality of anti-slip protrusions are uniformly fixed on the outer periphery of the fixing sleeve.

[0026] By adopting the above technical solution, it is easy to hold the outer circumferential surface of the fixed sleeve.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. During the assembly of the fuse box, the wiring assembly is pre-connected to the corresponding external cable. Then, the wiring assembly is fixedly inserted into the limiting cavity of the corresponding fixing sleeve. Next, one end of the fuse tube is inserted into the mounting cavity of one of the fixing sleeves, and the inner end of the fuse tube is connected to the wiring assembly in the limiting cavity. Finally, the two fixing sleeves are inserted and fixed to realize the assembly and application of the fuse box. No additional screws are needed for tightening during this process, thereby improving the assembly efficiency of the fuse box. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0031] Figure 2 This is an exploded structural diagram of Embodiment 1 of this application;

[0032] Figure 3This is a cross-sectional view of Embodiment 1 of this application illustrating the installation and cooperation of the wiring assembly and the fixing sleeve;

[0033] Figure 4 This is a schematic diagram illustrating the structure of the wiring assembly in Embodiment 1 of this application;

[0034] Figure 5 This is a cross-sectional view of Embodiment 1 of this application illustrating the installation and assembly of the fuse tube and the fixing sleeve;

[0035] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of this application;

[0036] Figure 7 This is a schematic diagram illustrating the structure of two fixed sleeves connected in an insertion arrangement, as shown in Embodiment 2 of this application;

[0037] Figure 8 This is a schematic diagram of the overall structure of Embodiment 3 of this application;

[0038] Figure 9 This is a partial cross-sectional view of Embodiment 3 of this application illustrating the installation and assembly of the protective components;

[0039] Figure 10 This is a schematic diagram of the structure of two limiting plates rotating in opposite directions, as shown in Embodiment 3 of this application.

[0040] In the diagram, 1. Fuse tube; 2. Fixing sleeve; 21. Mounting cavity; 22. Fixing protrusion ring; 221. Positioning insert plate; 2211. Fixing through groove; 222. Positioning slot; 2221. Trapezoidal protrusion; 22211. Guide arc surface; 23. Limiting protrusion; 231. Guide slope; 24. Limiting retaining ring; 241. Guide slope; 25. Limiting cavity; 26. Anti-slip protrusion; 3. Wiring assembly; 31 311. Insertion part; 32. Locking buckle; 33. Connecting part; 34. Bending plate; 35. Abutting protrusion; 36. Baffle; 37. Connecting foot; 48. Sealing sleeve; 49. Waterproof protrusion ring; 40. Connecting protrusion ring; 41. Connecting ring groove; 5. Sealing gasket; 60. Protective component; 61. Limiting plate; 62. Leaving notch; 63. Bending plate; 64. Traction ring; 65. Traction rod; 66. Pull rod. Detailed Implementation

[0041] The present application will be further described in detail below with reference to all the accompanying drawings.

[0042] Example 1:

[0043] Reference Figure 1 and Figure 2A fuse box includes a fuse tube 1, two fixed sleeves 2 that are snapped together, and two sets of wiring assemblies 3 for connecting external cables and the fuse tube 1. The openings at the ends of the two fixed sleeves 2 that are close to each other are mounting cavities 21 for inserting the fuse tube 1, and the openings at the ends of the two fixed sleeves 2 that are far apart from each other are limiting cavities 25 for installing the wiring assemblies 3. The mounting cavity 21 and the limiting cavity 25 in the same fixed sleeve 2 are interconnected.

[0044] During the assembly of the fuse box, the wiring assembly 3 is pre-connected to the corresponding external cable, and then the wiring assembly 3 is fixedly inserted into the limiting cavity 25 in the corresponding fixing sleeve 2. Then, one end of the fuse tube 1 is inserted into the mounting cavity 21 of one of the fixing sleeves 2, and the inner end of the fuse tube 1 is connected to the wiring assembly 3 in the limiting cavity 25. Finally, the two fixing sleeves 2 are inserted and fixed, and the outer end of the fuse tube 1 is inserted into the other fixing sleeve 2 and connected to the other wiring assembly 3. In this way, the fuse box can be assembled and applied without the need for additional screws for fastening.

[0045] Reference Figure 2 and Figure 3 The two fixed sleeves 2 are integrally formed with a fixed protruding ring 22 on the outer periphery of their close ends. Two positioning plates 221 are evenly distributed on the side of the fixed protruding ring 22 near the opening of the fixed sleeve 2. The positioning plates 221 are integrally injection molded with the fixed protruding ring 22. A positioning slot 222 is provided on the outer periphery of the fixed protruding ring 22 between adjacent positioning plates 221. The two positioning slots 222 are evenly distributed around the axis of the fixed sleeve 2.

[0046] The inner wall of the positioning slot 222 is integrally formed with a trapezoidal protrusion 2221, and the side edge of the positioning plate 221 facing the other fixed sleeve 2 is chamfered. The positioning plate 221 is provided with a fixing through groove 2211 for the trapezoidal protrusion 2221 to be inserted. When the two fixed sleeves 2 are inserted and fixed, the two fixed sleeves 2 are first rotated 90 degrees off-center, so that the positioning plate 221 on one fixed sleeve 2 is inserted into the positioning slot 222 on the other along its own chamfer. The trapezoidal protrusion 2221 on the positioning slot 222 is inserted into the fixing through groove 2211 on the positioning plate 221 along its own inclined surface, so that the two fixed sleeves 2 are locked together and fixed.

[0047] Reference Figure 3Four limiting protrusions 23 are evenly distributed on the inner wall of the mounting cavity 21 to limit the fuse tube 1, and the side edge of the limiting protrusions 23 facing the opening of the mounting cavity 21 is provided with a guide slope 231; the fuse tube 1 is inserted into the inner wall of the mounting cavity 21 along the guide slope 231, and at the same time, the inner side of the limiting protrusions 23 abuts against the outer peripheral surface of the fuse tube 1, thereby improving the installation stability of the fuse tube 1 in the mounting cavity 21.

[0048] Reference Figure 4 The wiring assembly 3 includes a plug-in part 31 connected to the end of the fuse tube 1, a connecting part 32 connected to the external cable, and a baffle 33 for connecting the two. The plug-in part 31, the connecting part 32 and the baffle 33 are integrally formed. Two bent plates 321 are symmetrically fixed on the connecting part 32. Several abutting protrusions 3211 are integrally formed on the side of the two bent plates 321 that are close to each other.

[0049] When connecting the external cable to the connector 32, the insulation of the cable end is stripped off beforehand, and then the exposed core wire is placed between the two bending plates 321. Then, the bending plates 321 are bent and pressed and fixed to the outside of the exposed core wire using a tool, so that the abutting protrusion 3211 is pressed tightly against the exposed core wire.

[0050] Reference Figure 3 and Figure 4 Two locking buckles 311, stamped by a stamping machine, are fixed on the outer periphery of the insertion part 31 near the connecting part 32. A limiting ring 24 is integrally formed on the inner wall of the limiting cavity 25 around the axis of the fixing sleeve 2, and a guide slope 241 is provided on the side edge of the limiting ring 24 facing the opening of the limiting cavity 25. The sides of the limiting protrusion 23 and the limiting ring 24 that are close to each other together limit and fix the insertion part 31 in the limiting cavity 25.

[0051] When the plug part 31 is fixedly inserted between the limiting ring 24 and the limiting protrusion 23, the side edge of the plug part 31 away from the connecting part 32 abuts against one side of the limiting protrusion 23, and the locking buckle 311 abuts against the side of the limiting ring 24 facing the limiting protrusion 23, thereby achieving the limiting and fixing of the plug part 31.

[0052] Reference Figure 4 and Figure 5 The insertion part 31 and the connecting part 32 are misaligned. When the fuse tube 1 is inserted into the cavity of the insertion part 31, the side of the baffle 33 facing the insertion part 31 can abut against the end of the fuse tube 1 in the insertion part 31, thereby further limiting and fixing the fuse tube 1 and reducing the possibility of the fuse tube 1 becoming loose.

[0053] Reference Figure 3 and Figure 4The limiting cavity 25 is provided with a rubber sealing sleeve 4. When in use, the sealing sleeve 4 is fitted onto the outer periphery of the external cable. Three waterproof protrusions 41 are integrally formed on the outer periphery of the sealing sleeve 4, which abut against the inner wall of the limiting cavity 25. A connecting protrusion 42 is integrally formed on the side of the sealing sleeve 4 facing the installation cavity 21.

[0054] A connecting ring groove 421 is provided on the outer periphery of the connecting protrusion ring 42. Two connecting feet 34 for connecting the sealing sleeve 4 are integrally formed on the side of the connecting part 32 away from the plug-in part 31. The two connecting feet 34 can be fixedly locked in the connecting ring groove 421 after being bent, thereby realizing the installation and fixation of the wiring assembly 3 and the sealing sleeve 4.

[0055] Reference Figure 5 A rubber sealing gasket 5 is fitted around the outer periphery of the fuse tube 1. After the fuse box is installed, the sides of the fixing sleeve 2 that are close to each other are pressed against the two sides of the sealing gasket 5 to improve its waterproof performance.

[0056] The implementation principle of this application embodiment is as follows:

[0057] During the assembly of the fuse box, the sealing sleeve 4 is pre-installed on the outer periphery of the external cable, and then the insulation of the end of the external cable passing through the sealing sleeve 4 is removed and pressed and fixed with the connecting part 32; then the plug part 31 is installed inside the limiting cavity 25, and at the same time the waterproof protrusion 41 on the sealing sleeve 4 is pressed against the inner wall of the limiting cavity 25.

[0058] The sealing gasket 5 is placed on the outer periphery of the fuse tube 1. One end of the fuse tube 1 is inserted into the mounting cavity 21 of one of the fixing sleeves 2, and the inner end of the fuse tube 1 is inserted into the inner cavity of the insertion part 31. Then, the two fixing sleeves 2 are inserted and fixed, and the outer end of the fuse tube 1 is inserted into the other fixing sleeve 2 and inserted into the inner cavity of the corresponding insertion part 31, thereby realizing the installation and fixing of the fuse box.

[0059] Example 2:

[0060] Reference Figure 6 and Figure 7 The difference between this embodiment and Embodiment 1 is that a plurality of anti-slip protrusions 26 are uniformly fixed on the outer periphery of the fixed sleeve 2, wherein the anti-slip protrusions 26 are integrally formed with the fixed sleeve 2, and the length direction of the anti-slip protrusions 26 is parallel to the axial direction of the fixed sleeve 2.

[0061] The two fixed sleeves 2 have different unlocking methods; the arc length corresponding to the cross section of the positioning slot 222 on the fixed protrusion ring 22 is longer. Specifically, the arc length corresponding to the positioning slot 222 is not less than twice the width of the positioning insert plate 221, and the opposite two sides of the trapezoidal protrusion 2221 are guide arc surfaces 22211.

[0062] The positioning plate 221 on one of the fixed sleeves 2 can be inserted into the positioning slot 222 on the other fixed sleeve 2 and rotate around the axis of the fixed sleeve 2, so that the trapezoidal protrusion 2221 that is stuck in the fixed through groove 2211 slides out of the original fixed through groove 2211 along the guide arc surface 22211.

[0063] After the two fixed sleeves 2 are inserted into each other, the operator can hold the two fixed sleeves 2 with both hands and rotate them in opposite directions (along the two thick arrows in the figure) to quickly unlock the two locked fixed sleeves 2.

[0064] Example 3:

[0065] Reference Figure 8 , Figure 9 and Figure 10 The difference between this embodiment and Embodiment 1 is that a protective component 6 is provided at the far-away end openings of the two fixed sleeves 2. The protective component 6 includes two limiting plates 61 symmetrically arranged at the end openings of the fixed sleeves 2. A clearance notch 611 for cable insertion is provided on the side edge of the two limiting plates 61 that is close to each other. A bending plate 62 that bends toward the axis of the fixed sleeve 2 is fixed on the side edge of the two limiting plates 61 that is far away from each other. The bending plate 62 fits against the outer peripheral surface of the fixed sleeve 2, and the side edge of the bending plate 62 away from the fixed sleeve 2 is hinged to the outer peripheral surface of the fixed sleeve 2.

[0066] A traction ring 63 is fitted on the outer periphery of the fixed sleeve 2. The traction ring 63 can slide back and forth along the axis of the fixed sleeve 2. Two traction rods 64 are symmetrically hinged to the side edge of the traction ring 63 facing the bending plate 62. The other end of the traction rod 64 is hinged to a pull rod 65. The other end of the pull rod 65 is hinged to the side edge of the bending plate 62 away from the fixed sleeve 2. By sliding the traction ring 63, the traction rods 64 can be pulled, thereby causing the bending plate 62 to rotate, and finally causing the two limiting plates 61 to rotate towards or away from each other.

[0067] After the two fixed sleeves 2 are snapped together, the positioning plate 221 on the other fixed sleeve 2 passes through the positioning slot 222 and extends to the outer side of the fixed sleeve 2 and abuts against one side of the traction ring 63. In this state, the two limiting plates 61 abut against each other's sides, that is, the two limiting plates 61 limit the opening on the outer side of the fixed sleeve 2 in this state, so as to prevent the sealing sleeve 4 and the wiring assembly 3 from coming out from the outer opening when the two fixed sleeves 2 are snapped together, thereby improving their protection and dustproof performance.

[0068] The implementation principle of this application embodiment is as follows:

[0069] When the two fixed sleeves 2 are not engaged, the user can move the traction ring 63 toward the fixed protruding ring 22, thereby causing the two limiting plates 61 to rotate in opposite directions. At this time, the sealing sleeve 4 and the wiring assembly 3 can be installed into the fixed sleeve 2 from the opening.

[0070] After the two fixed sleeves 2 are engaged, the positioning plate 221 on the other fixed sleeve 2 passes through the positioning slot 222 and extends to the outer side of the fixed sleeve 2 and abuts against one side of the traction ring 63. In this state, the two limiting plates 61 abut against each other on their sides, thereby sealing the openings of the two fixed sleeves 2 that are far apart from each other.

[0071] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0072] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fuse box, characterized in that, It includes a fuse tube (1), two fixed sleeves (2) that are snapped together, and two sets of wiring assemblies (3) for connecting external cables and fuse tube (1). The openings at the ends of the two fixed sleeves (2) that are close to each other are mounting cavities (21) for inserting fuse tube (1), and the openings at the ends of the two fixed sleeves (2) that are far apart from each other are limiting cavities (25) for installing wiring assemblies (3). The mounting cavity (21) and the limiting cavity (25) are connected. A fixing protrusion ring (22) is fixed on the outer periphery of the two fixed sleeves (2) that are close to each other. A number of positioning plates (221) are evenly distributed on the side of the fixing protrusion ring (22) near the opening of the fixing sleeve (2). A positioning slot (222) is opened between adjacent positioning plates (221) on the outer periphery of the fixing protrusion ring (22). The number of positioning slots (222) are evenly distributed around the axis of the fixing sleeve (2). A trapezoidal protrusion (2221) is fixed on the inner wall of the positioning slot (222), and a fixed through groove (2211) is opened on the positioning plate (221); after the two fixed sleeves (2) are rotated in a staggered manner, the positioning plate (221) on one of the fixed sleeves (2) is inserted into the positioning slot (222) on the other, and the trapezoidal protrusion (2221) on the positioning slot (222) is inserted into the fixed through groove (2211) on the positioning plate (221); The two fixed sleeves (2) are provided with protective components (6) at their far-away end openings. The protective components (6) include two limiting plates (61) symmetrically arranged at the end openings of the fixed sleeves (2). The two limiting plates (61) are provided with clearance notches (611) for cable insertion on their close-to-each side edges. The two limiting plates (61) are fixed with bending plates (62) that bend toward the axis of the fixed sleeves (2) on their far-away side edges. The bending plates (62) are in contact with the outer circumferential surface of the fixed sleeves (2), and the side edge of the bending plates (62) away from the fixed sleeves (2) is hinged to the outer circumferential surface of the fixed sleeves (2). A traction ring (63) is fitted on the outer periphery of the fixed sleeve (2). The traction ring (63) can slide back and forth along the axis of the fixed sleeve (2). Two traction rods (64) are symmetrically hinged on the side edge of the traction ring (63) facing the bending plate (62). The other end of the traction rod (64) is hinged to a pull rod (65). The other end of the pull rod (65) is hinged to the side edge of the bending plate (62) away from the fixed sleeve (2). By sliding the traction ring (63), the traction rod (64) can be pulled, thereby causing the bending plate (62) to rotate, and finally causing the two limiting plates (61) to rotate towards or away from each other. When the two fixed sleeves (2) are not engaged, the user can move the traction ring (63) toward the fixed protruding ring (22), thereby causing the two limiting plates (61) to rotate in opposite directions. At this time, the sealing sleeve (4) and the wiring assembly (3) can be installed into the fixed sleeve (2) from the opening. After the two fixed sleeves (2) are engaged, the positioning plate (221) on the other fixed sleeve (2) passes through the positioning slot (222) and extends to the outer side of the fixed sleeve (2) and abuts against one side of the traction ring (63). At this time, the two limiting plates (61) abut against each other on their close sides, thereby sealing the openings of the two fixed sleeves (2) that are far apart from each other.

2. A fuse box according to claim 1, characterized in that, The two opposite sides of the trapezoidal protrusion (2221) are guide arc surfaces (22211), and the arc length corresponding to the positioning slot (222) is not less than twice the width of the positioning insert (221); the positioning insert (221) on one fixed sleeve (2) can be inserted into the positioning slot (222) on the other fixed sleeve (2) and rotate around the axis of the fixed sleeve (2).

3. A fuse box according to claim 1, characterized in that, The inner wall of the mounting cavity (21) is fixed with a limiting protrusion (23) for limiting the fuse tube (1), and the inner wall of the limiting cavity (25) is fixed with a limiting retaining ring (24) around the axis of the fixing sleeve (2); the sides of the limiting protrusion (23) and the limiting retaining ring (24) that are close to each other together limit and fix the wiring assembly (3) in the limiting cavity (25).

4. A fuse box according to claim 2, characterized in that, The wiring assembly (3) includes a plug-in part (31) connected to the end of the fuse tube (1), a connecting part (32) connected to the external cable, and a baffle (33) for connecting the two. The plug-in part (31) is fixedly provided with a plurality of locking buckles (311) on the outer periphery near the connecting part (32). The plug-in part (31) is fixedly inserted between the limiting ring (24) and the limiting protrusion (23). The locking buckles (311) can abut against the side of the limiting ring (24) facing the limiting protrusion (23).

5. A fuse box according to claim 4, characterized in that, The plug-in portion (31) and the connecting portion (32) are offset, and the side of the baffle (33) facing the plug-in portion (31) can abut against the end of the fuse tube (1) inserted into the plug-in portion (31).

6. A fuse box according to claim 4, characterized in that, The connecting part (32) is symmetrically fixed with bending plates (321), and a number of abutting protrusions (3211) are fixed on the sides of the two bending plates (321) that are close to each other.

7. A fuse box according to claim 4, characterized in that, The limiting cavity (25) is provided with a sealing sleeve (4) installed on the outer periphery of the external cable. Several waterproof protruding rings (41) that abut against the inner wall of the limiting cavity (25) are fixed on the outer periphery of the sealing sleeve (4). The sealing sleeve (4) has a connecting protrusion (42) fixed on its side facing the mounting cavity (21). The connecting protrusion (42) has a connecting ring groove (421) on its outer periphery. The connecting part (32) has a connecting foot (34) fixed on its side away from the insertion part (31) for connecting the sealing sleeve (4). The connecting foot (34) is fixedly engaged in the connecting ring groove (421).

8. A fuse box according to claim 1, characterized in that, A sealing gasket (5) is fitted on the outer periphery of the fuse tube (1), and the sides of the fixed sleeve (2) that are close to each other abut against the side of the sealing gasket (5).

9. A fuse box according to claim 1, characterized in that, Several anti-slip ridges (26) are uniformly fixed on the outer periphery of the fixed sleeve (2).

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