Safety device, wire harness assembly and carrier

Abstract

The utility model relates to the field of electrical components, and discloses a safety device, a wire harness assembly and a carrier. The safety device comprises a fuse link which is respectively connected with the two cables; the insulating structure is arranged outside the fuse element in a surrounding manner; the shielding structure is arranged outside the insulation structure in a surrounding mode, and the two ends of the shielding structure are connected with the shielding layers of the two cables respectively. The insulating structure can ensure that the fusing piece is isolated from the shielding structure and the external environment, electric leakage or short circuit is prevented, and meanwhile, damage to external equipment or personnel caused by electric arc or high temperature generated during fusing is avoided. The shielding structure can wrap the fuse element, so that an electromagnetic field generated by the fuse element and the cable located in the shielding structure is limited in the shielding structure, electromagnetic interference to other surrounding components is reduced, meanwhile, external electromagnetic waves can be absorbed or reflected, the electromagnetic waves are prevented from entering the interior, and therefore the external electromagnetic interference is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrical component technology, specifically to safety devices, wiring harness assemblies and carriers. Background Technology

[0002] New energy vehicles, such as new energy vehicles or aircraft, have a variety of high-voltage electrical appliances. To ensure electrical safety, high-voltage fuses are required to protect the circuits in the power distribution circuits of these high-voltage electrical appliances.

[0003] High-voltage fuses are typically located in high-voltage distribution boxes or integrated into main distribution modules. As the functions of high-voltage distribution boxes or main distribution modules increase, the demand for internal space also increases. Increasing the size of these boxes or modules would not meet lightweighting requirements. To save internal space, the common practice is to place the fuses outside the high-voltage distribution box or main distribution module.

[0004] To allow fuses to be placed outside of high-voltage distribution boxes or main power distribution modules, related technologies integrate fuses onto wiring harnesses. However, this method of integrating fuses onto wiring harnesses is prone to electromagnetic interference problems. Utility Model Content

[0005] In view of this, the present invention provides a safety device, a wire harness assembly, and a carrier to solve or improve the problem of electromagnetic interference that is easily generated when fuses are integrated on wire harnesses.

[0006] In a first aspect, this utility model provides a safety device for connecting two cables with shielding layers, the safety device comprising:

[0007] A fuse, wherein the fuse is connected to each of the two cables respectively;

[0008] An insulating structure is provided around the fuse and encapsulates the fuse;

[0009] A shielding structure is provided around the insulation structure, and both ends of the shielding structure are respectively connected to the shielding layers of the two cables.

[0010] In one optional implementation, the shielding structure includes:

[0011] A shielding shell, which is a cylindrical structure, is fitted over the insulating structure.

[0012] The first end cap, there are two first end caps, the two first end caps are respectively connected to the two ends of the shielding shell, and the two first end caps are respectively connected to the shielding layer of the two cables.

[0013] In one optional embodiment, the first end cap is provided with a first annular flange at one end near the shielding shell, and the first annular flange is inserted into the shielding shell.

[0014] And / or, the end of the first end cap away from the shielding shell is provided with a second annular flange, the shielding structure further includes a shielding ring, the shielding ring is inserted into the second annular flange, and the shielding layer is sandwiched between the shielding ring and the second annular flange;

[0015] And / or, the shielding shell is formed by at least two first splicing plates.

[0016] In one optional embodiment, the insulating structure is formed by enclosing at least two second splicing plates and forming a cylindrical structure, wherein the shielding structure is used to radially limit the second splicing plates;

[0017] Alternatively, the insulating structure includes a cylinder and a cap, the cylinder being fitted onto the outside of the fuse, the side wall of the cylinder having an opening at a position corresponding to the fuse, and the cap removably covering the opening.

[0018] In one alternative embodiment, the safety device further includes a threaded component and a connecting terminal disposed within the insulating structure. The connecting terminal is connected to a corresponding cable, and the threaded component passes through the corresponding connecting terminal and the fuse, and is threadedly connected to the insulating structure.

[0019] In one alternative embodiment, the safety device further includes a housing structure surrounding the shielding structure, with each end of the housing structure connected to one of the two cables.

[0020] In one alternative embodiment, the housing structure includes:

[0021] The outer casing is a cylindrical structure and is fitted over the shielding structure.

[0022] The second end cap, there are two of them, the two second end caps are respectively closed at both ends of the outer shell, and the two second end caps are respectively connected to the two cables. The second end cap is provided with a through hole, the through hole is used for the cable to pass through and extend into the inside of the second end cap.

[0023] In one alternative embodiment, the fuse is crimped to the cable;

[0024] Alternatively, the safety device may further include a wiring harness terminal, which includes a connecting section and a sleeve section connected to each other, the connecting section being connected to a corresponding cable, and the sleeve section being inserted into the fuse.

[0025] Alternatively, the safety device may further include a limiting block disposed at the end of the cable, the limiting block being located within the safety device, and the limiting block being used to limit the shielding structure in the axial direction of the cable.

[0026] Secondly, this utility model also provides a wire harness assembly, comprising:

[0027] Both the first cable and the second cable have shielding layers.

[0028] The safety device described above;

[0029] The first cable and the second cable are connected by the safety device.

[0030] Thirdly, this utility model also provides a carrier, including the safety device as described above or the wiring harness assembly as described above.

[0031] The safety device provided by this utility model connects the fuse to two cables respectively, thereby integrating the fuse onto the wire harness so that the fuse does not occupy the space of the high-voltage distribution box or the main power distribution module.

[0032] By surrounding the fuse with an insulating structure, the fuse can be isolated from the shielding structure and the external environment, preventing leakage or short circuits, and avoiding damage to external equipment or personnel from the electric arc or high temperature generated when the fuse is broken.

[0033] By surrounding the insulation structure with a shielding structure, the shielding structure can encapsulate the fuse, effectively sealing it. This confines the electromagnetic field generated by the fuse and the cables within the shielding structure, reducing electromagnetic interference to other components.

[0034] At the same time, the shielding structure can absorb or reflect external electromagnetic waves, preventing them from entering the interior and thus avoiding external electromagnetic interference.

[0035] Furthermore, by connecting the shielding structure to the cable's shielding layer, a continuous conductive surface can be formed between the shielding structure and the shielding layer, ensuring the continuity of the shielding effect, preventing electromagnetic waves from leaking or intruding from the connection point, and ensuring that the shielding effect is not weakened due to the interruption of the shielding layer.

[0036] The wiring harness assembly and carrier provided by this utility model include all the advantages of the aforementioned safety device because they incorporate the safety device provided by this utility model. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the structure of a safety device provided in an embodiment of this utility model;

[0039] Figure 2 Exploded view of the structure of the safety device provided in the embodiment of this utility model;

[0040] Figure 3 A schematic diagram of the internal structure of the safety device provided in this embodiment of the utility model;

[0041] Figure 4 for Figure 3 A magnified view of part A in the image;

[0042] Figure 5 for Figure 3 A magnified view of part B in the image;

[0043] Figure 6 A schematic diagram of the shielding structure provided in an embodiment of this utility model;

[0044] Figure 7 A schematic diagram of the cable structure provided in an embodiment of this utility model;

[0045] Figure 8 A schematic diagram of the shell structure provided in the embodiment of this utility model;

[0046] Figure 9 A schematic diagram of the insulation structure provided in the embodiment of this utility model;

[0047] Figure 10 A schematic diagram of the insulating structure and shielding shell configured as a splicing structure provided for an embodiment of this utility model;

[0048] Figure 11 This is a schematic diagram of the structure of the wire harness terminal provided in an embodiment of the present utility model.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Cable; 101. Shielding layer; 2. Fuse; 3. Insulation structure; 301. Second splicing plate; 302. Cylinder; 303. Cover; 4. Shielding structure; 401. Shielding shell; 4011. First splicing plate; 402. First end cap; 4021. First annular flange; 4022. Second annular flange; 403. Shielding ring; 5. Threaded parts; 6. Connecting terminals; 7. Shell structure; 701. Outer shell; 702. Second end cap; 7021. Assembled shell; 8. Wire harness terminal; 801. Connecting section; 802. Sleeve section; 9. Limiting block; 10. Sealing element. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0052] High-voltage fuses are typically located in high-voltage distribution boxes or integrated into main distribution modules. As the functions of high-voltage distribution boxes or main distribution modules increase, the internal space becomes insufficient. Increasing the size of high-voltage distribution boxes or main distribution modules does not meet the requirements for lightweight design.

[0053] To allow fuses to be placed outside of high-voltage distribution boxes or main power distribution modules, related technologies integrate fuses onto wire harnesses. Since cables typically have shielding layers, they are less susceptible to electromagnetic interference from external components and also do not generate electromagnetic interference to other components.

[0054] However, fuses are not electromagnetically protected during the energizing process, which can easily lead to electromagnetic interference. For example, electromagnetic interference generated by fuses may affect nearby electronic equipment, communication systems, or power systems.

[0055] To address or improve the problem of electromagnetic interference caused by integrating fuses on wire harnesses, this utility model provides a safety device, a wire harness assembly, and a carrier.

[0056] The following is combined Figures 1 to 11 This describes the safety device provided in the embodiments of the present invention.

[0057] Specifically, the safety device is used to connect two cables 1, and both cables 1 have a shielding layer 101. It is understood that the shielding layer 101 is an important component of the cable 1 for electromagnetic interference protection, and is mainly composed of semi-conductive materials or metals, such as copper strip, copper wire braid, aluminum foil or metal film, etc., and 101 is wrapped around the outside of 1. This application does not involve any improvement to the cable 1 itself, so it will not be described in detail here.

[0058] The safety device in this embodiment includes a fuse 2, an insulating structure 3, and a shielding structure 4.

[0059] The fuse element 2 is connected to each of the two cables 1. Essentially, the fuse element 2 is connected to the wires of the cables 1. Optionally, the fuse element 2 can be configured as a fuse circuit breaker. The basic principle is that when a short circuit or other abnormal situation occurs in the circuit, the fuse temperature rises rapidly and melts at high temperature, thus breaking the circuit.

[0060] An insulating structure 3 is disposed around the outside of the fuse element 2. For example, the insulating structure 3 surrounds the fuse element 2 circumferentially and covers the outside of the fuse element 2. The insulating structure 3 can be a plastic layer, a rubber layer, or insulating paper.

[0061] The shielding structure 4 is arranged around the insulation structure 3, and its two ends are respectively connected to the shielding layers 101 of the two cables 1. Optionally, the shielding structure 4 surrounds the circumference of the fuse 2 and covers the outside of the insulation structure 3. For example, the shielding structure 4 can be a metal structure or a semiconductor structure. The metal structure can be a metal cylinder or a metal mesh, and the material of the metal structure can be copper, aluminum, or steel.

[0062] In this embodiment, the fuse 2 is connected to two cables 1 respectively, thereby integrating the fuse 2 onto the wire harness, so that the fuse 2 does not occupy the space of the high-voltage distribution box or the main power distribution module.

[0063] By surrounding the fuse 2 with the insulation structure 3, the fuse 2 can be isolated from the shielding structure 4 and the external environment to prevent leakage or short circuit, while avoiding damage to external equipment or personnel caused by the electric arc or high temperature generated when the fuse is broken.

[0064] By surrounding the insulation structure 3 with the shielding structure 4, the shielding structure 4 can enclose the fuse 2, which is equivalent to encapsulating the fuse 2. This confines the electromagnetic field generated by the fuse 2 and the cable 1 located in the shielding structure 4 within the shielding structure 4, reducing electromagnetic interference to other components in the surrounding area.

[0065] At the same time, the shielding structure 4 can absorb or reflect external electromagnetic waves, preventing electromagnetic waves from entering the interior of the shielding structure 4, thereby avoiding external electromagnetic interference.

[0066] Furthermore, by connecting the shielding structure 4 to the shielding layer 101 of the cable 1, the shielding structure 4 and the shielding layer 101 can form a continuous conductive surface, ensuring the continuity of the shielding effect, preventing electromagnetic waves from leaking or intruding from the connection point, and ensuring that the shielding effect is not weakened due to the interruption of the shielding layer 101.

[0067] In some embodiments provided by this utility model, the shielding structure 4 includes a shielding shell 401 and a first end cap 402.

[0068] The shielding shell 401 has a cylindrical structure. For example, the shielding shell 401 can be set as a cylindrical structure to make the shape of the shielding shell 401 regular, the structure simple, and easy to process. Optionally, the shielding shell 401 can be a cylindrical structure formed of metal or metal mesh. The shielding shell 401 is fitted outside the insulating structure 3.

[0069] There are two first end caps 402, which are respectively connected to both ends of the shielding shell 401 and respectively connected to the shielding layer 101 of the two cables 1. Optionally, the first end caps 402 are made of metal or semiconductor material. Further, the first end caps 402 are made of the same material as the shielding shell 401.

[0070] In this embodiment, the shielding shell 401 has good electromagnetic shielding performance. It is fitted outside the insulating structure 3 and can effectively block electromagnetic interference. The two first end caps 402 are respectively connected to the two ends of the shielding shell 401 and connected to the shielding layer 101 of the cable 1, which can ensure the continuity and integrity of the shielding effect and prevent electromagnetic interference from leaking from the connection.

[0071] Furthermore, during installation, the two first end caps 402 can be respectively fitted onto the two cables 1 and connected to the shielding layer 101 of the cables 1. Additionally, the insulating structure 3 and the shielding shell 401 can be fitted onto either cable 1. After connecting the fuse 2 to the two cables 1, the insulating structure 3 is moved to face the fuse 2, and the shielding shell 401 is moved to face the insulating structure 3. Then, the first end caps 402 are connected to the shielding shell 401, thus completing the installation of the shielding structure 4. The disassembly process can be deduced from the installation process and will not be elaborated further.

[0072] This design simplifies the assembly and disassembly of the shielding structure 4, reducing installation difficulty. Furthermore, by simply removing the first end cap 402 from the shielding shell 401, the internal fuse 2 or insulation structure 3 can be inspected, repaired, or replaced without affecting the overall performance of the shielding structure 4, thus improving maintenance efficiency and convenience.

[0073] Optionally, the first end cap 402 can be connected to the shielding layer 101 by means of abutment, crimping, welding, or conductive adhesive bonding. It is understood that when the first end cap 402 is connected to the shielding layer 101 by means of crimping, welding, or conductive adhesive bonding, the connection structure can be disassembled, the fuse 2 replaced, and then reconnected during the replacement of the fuse 2.

[0074] In some embodiments of this utility model, a first annular flange 4021 is provided at one end of the first end cap 402 near the shielding shell 401. The first annular flange 4021 is inserted into the shielding shell 401.

[0075] Optionally, the shielding shell 401 is inserted into the interior of the first annular flange 4021, that is, both ends of the shielding shell 401 are respectively inserted into the first annular flange 4021 of the two first end caps 402.

[0076] Alternatively, the first annular flange 4021 is inserted into the shielding shell 401, that is, the first annular flanges 4021 of the two first end caps 402 are respectively inserted into the two ends of the shielding shell 401.

[0077] In this embodiment, after the first annular flange 4021 is inserted into the shielding shell 401, a tight mechanical connection can be formed to prevent the end cap from loosening or falling off the shielding shell 401, thereby improving the stability of the shielding structure 4.

[0078] In addition, the first end cap 402 and the shielding shell 401 are connected by a plug-in connection, which eliminates the need for additional connectors, saves installation time, facilitates disassembly and reinstallation, and makes it convenient to maintain or replace the shielding structure 4 or internal components.

[0079] In addition, the first annular flange 4021 is tightly inserted into the shielding shell 401, which can reduce gaps at the connection, ensure the continuity of electromagnetic shielding, and prevent electromagnetic interference from leaking from the connection.

[0080] In addition, the plug-in structure can achieve a certain degree of sealing effect, preventing external pollutants such as dust and moisture from entering the shielding shell 401 and protecting the internal components.

[0081] Optionally, at least two protruding structures are provided on the inner or outer sidewall of the first annular flange 4021. The at least two protruding structures are distributed circumferentially along the first annular flange 4021, and the protruding structures are used to abut against the shielding shell 401.

[0082] Specifically, when the first annular flange 4021 is inserted into the interior of the shielding shell 401, the protrusion structure is provided on the outer side wall of the first annular flange 4021; when the shielding shell 401 is inserted into the interior of the first annular flange 4021, the protrusion structure is provided on the inner side wall of the first annular flange 4021.

[0083] In this embodiment, the protruding structure abuts against the shielding shell 401 to form a tight mechanical connection, preventing the first annular flange 4021 from loosening or falling off from the shielding shell 401, thereby improving the stability of the overall structure.

[0084] Alternatively, the protruding structure can be configured as a stamped structure.

[0085] Of course, in other embodiments, the first end cap 402 and the shielding shell 401 can also be connected by adhesive or welding to ensure the stability of the connection.

[0086] Of course, the first end cap 402 is not limited to being connected to the shielding layer 101 in the manner described above. For example, in other embodiments provided by this utility model, the end of the first end cap 402 away from the shielding shell 401 is provided with a second annular flange 4022. That is, the second annular flange 4022 and the first annular flange 4021 are respectively provided at both ends of the first end cap 402.

[0087] Furthermore, the shielding structure 4 also includes a shielding ring 403. For example, the shielding ring 403 can be a metal ring. The shielding ring 403 is inserted into the second annular flange 4022. For example, the shielding ring 403 is fitted onto the outside of the second annular flange 4022, or the shielding ring 403 can also be inserted into the second annular flange 4022.

[0088] The shielding layer 101 is sandwiched between the shielding ring 403 and the second annular flange 4022. For example, one end of the shielding layer 101 of the cable 1 is peeled off from the cable 1 and inserted between the shielding ring 403 and the second annular flange 4022, and clamped by the shielding ring 403 and the second annular flange 4022.

[0089] In this embodiment, the insertion and engagement of the shielding ring 403 with the second annular flange 4022, and the sandwiching of the shielding layer 101 of the cable 1 between them, enables the shielding layer 101 and the shielding structure 4 to form a continuous conductive path, thereby ensuring the continuity of electromagnetic shielding from the shielding layer 101 to the shielding structure 4 and reducing the possibility of electromagnetic leakage.

[0090] In addition, the shielding ring 403 and the second annular flange 4022 clamp the cable layer 1, which can provide additional mechanical fixing for the shielding layer 101, so as to prevent the shielding layer 101 from loosening or falling off due to external force pulling, vibration or other reasons during use, ensuring the stability of the connection between the shielding layer 101 and the shielding structure 4, helping to maintain the stability of electromagnetic shielding performance, and also improving the mechanical reliability of the entire safety device.

[0091] In some embodiments provided by this utility model, the shielding shell 401 is formed by at least two first splicing plates 4011. For example, the shielding shell 401 includes at least two first splicing plates 4011.

[0092] At least two first splicing plates 4011 are distributed circumferentially along the insulating structure 3 and can form a cylindrical structure. Optionally, the first splicing plates 4011 are configured as arc-shaped plates, that is, the first splicing plates 4011 can form a cylindrical structure. Of course, the first splicing plates 4011 can also be flat plates or bent plates, so that the first splicing plates 4011 can form a prism structure.

[0093] The first splicing plate 4011 is detachably connected to the first end cap 402. Optionally, the first splicing plate 4011 can be inserted into the first annular flange 4021 of the first end cap 402, and the first annular flange 4021 can provide radial restraint for the first splicing plate 4011. Alternatively, the first splicing plate 4011 and the first end cap 402 are connected by threaded fasteners, for example, threaded fasteners pass through the first end cap 402 and are threadedly connected to the first splicing plate 4011.

[0094] In this embodiment, the first splicing plate 4011 can be assembled from the radial direction of the insulating structure 3. Compared with axial installation or integral insertion, this method requires less axial operating space. For example, during installation, the first splicing plates 4011 can be spliced ​​one by one along the circumference of the insulating structure 3, instead of inserting the entire shielding shell 401 from one end at once, making the installation process more convenient and reducing installation difficulty and labor intensity.

[0095] When a part of the shielding shell 401 is damaged, the specific first splicing plate 4011 can be easily disassembled and replaced without removing the entire shielding shell 401. This can save maintenance costs, reduce maintenance time, and minimize the impact on the normal operation of the equipment.

[0096] In addition, when it is necessary to inspect the fuse 2 or other components inside the safety device, any one of the first splicing plates 4011 can be opened without disassembling the entire shielding shell 401.

[0097] In some embodiments provided by this utility model, the insulating structure 3 is formed by at least two second splicing plates 301. For example, the insulating structure 3 includes at least two second splicing plates 301.

[0098] At least two second splicing plates 301 are distributed circumferentially along the fuse element 2 and can form a cylindrical structure. Optionally, the second splicing plates 301 are set as arc-shaped plates, that is, the second splicing plates 301 can form a cylindrical structure. Of course, the second splicing plates 301 can also be flat plates or bent plates, so that the second splicing plates 301 can form a prism structure.

[0099] The shielding structure 4 surrounds the insulating structure 3 and serves to radially limit the second splicing plate 301. That is, the shielding structure 4 is fitted onto the outside of the insulating structure 3, and under the limiting effect of the shielding structure 4, the second splicing plate 301 is kept in the spliced ​​state.

[0100] In this embodiment, the second splicing plate 301 can be assembled from the radial direction of the fusible link 2. This method requires less axial operating space compared to axial installation or integral insertion. For example, during installation, the second splicing plates 301 can be spliced ​​one by one along the circumference of the fusible link 2, instead of inserting the entire insulation structure 3 from one end at once, making the installation process more convenient and reducing installation difficulty and labor intensity.

[0101] When a part of the insulation structure 3 is damaged, the specific second splicing plate 301 can be easily disassembled and replaced without removing the entire insulation structure 3. This can save maintenance costs, reduce maintenance time, and minimize the impact on the normal operation of the equipment.

[0102] In addition, the limiting effect of the shielding structure 4 keeps at least two second splicing panels 301 in a spliced ​​state, eliminating the need for additional connectors to connect and fix at least two second splicing panels 301, thus saving material costs, simplifying the disassembly and assembly process, and making the disassembly and assembly process more convenient and faster.

[0103] Of course, the insulation structure 3 is not limited to the form of a splicing plate. For example, in other embodiments provided by this utility model, the insulation structure 3 includes a cylinder 302 and a cover 303.

[0104] The cylinder 302 is fitted onto the outside of the fuse 2, and the side wall of the cylinder 302 has an opening at the position corresponding to the fuse 2.

[0105] The cap 303 detachably covers the opening. For example, the cap 303 can be connected to the cylinder 302 by a snap-fit ​​or by a threaded fastener.

[0106] In this embodiment, the side wall of the cylinder 302 is provided with an opening. When installing the fuse 2, the fuse 2 can be directly inserted into the cylinder 302 through this opening. Compared with the method of inserting the fuse 2 from one end, the operation is more convenient, which can reduce the installation difficulty and improve the installation efficiency.

[0107] If it is necessary to inspect, repair or replace the fuse 2, simply open the removable cover 303 and operate the fuse 2 directly through the opening without disassembling the entire insulation structure 3. This can save maintenance time, reduce the risk of damage to the insulation structure 3 caused by frequent disassembly, and reduce maintenance costs.

[0108] In some embodiments provided by this utility model, the safety device further includes a threaded component 5 and a connecting terminal 6.

[0109] The connecting terminal 6 is connected to the corresponding cable 1. The connecting terminal 6 is disposed within the insulating structure 3. Optionally, the connecting terminal 6 is crimped or soldered to the corresponding cable 1. Each cable 1 is connected to a corresponding connecting terminal 6.

[0110] The threaded component 5 passes through the corresponding connecting terminal 6 and the fuse 2, and is threadedly connected to the insulating structure 3. For example, the threaded component 5 is threadedly connected to any of the second splicing plates 301, or to the cylinder 302.

[0111] Optionally, both the connecting terminal 6 and the fuse 2 are provided with through holes through which the threaded parts 5 can pass, and both ends of the fuse 2 are provided with through holes. For example, there are two sets of threaded parts 5. One set of threaded parts 5 passes through one end of the fuse 2 and the connecting terminal 6 of one of the two cables 1, and is threadedly connected to the insulation structure 3. The other set of threaded parts 5 passes through the other end of the fuse 2 and the connecting terminal 6 of the other of the two cables 1, and is threadedly connected to the insulation structure 3.

[0112] Alternatively, the threaded part 5 can be a screw or a bolt.

[0113] In this embodiment, if the fuse 2 needs to be replaced or the cable 1 malfunctions, the fuse 2 can be easily removed for replacement or repair simply by unscrewing the threaded part 5. This detachable connection method can reduce maintenance costs and time.

[0114] The threaded connection between the threaded component 5 and the insulating structure 3 provides a reliable mechanical fixation, thereby firmly fixing the connecting terminal 6 and the fuse 2 in the safety device, preventing the connection from loosening or falling off due to external forces such as vibration and impact during operation, and ensuring the structural stability and reliability of the safety device.

[0115] In some embodiments provided by this utility model, the safety device further includes a housing structure 7.

[0116] The housing structure 7 is arranged around the shielding structure 4, and both ends of the housing structure 7 are connected to two cables 1 respectively.

[0117] In this embodiment, the housing structure 7 can provide additional mechanical support for the safety device, making the entire device more robust and durable. The housing structure 7 can resist external impacts, compressions and vibrations, protecting key components such as the internal fuse 2, insulation structure 3 and shielding structure 4 from damage.

[0118] In addition, the housing structure 7 can form a relatively enclosed space, effectively preventing dust, moisture and other impurities from entering the safety device.

[0119] In some embodiments provided by this utility model, the housing structure 7 includes an outer shell 701 and a second end cap 702.

[0120] The outer shell 701 has a cylindrical structure and is fitted over the shielding structure 4. For example, the outer shell 701 can be made of metal or plastic. A metal shell can work in conjunction with the shielding structure 4 to provide double shielding. A plastic shell can effectively reduce the weight of the shell structure 7, contributing to the vehicle's lightweight design and insulation performance.

[0121] There are two second end caps 702, which are respectively enclosed at both ends of the housing 701 and connected to two cables 1 respectively. For example, the second end caps 702 can be metal or plastic caps. The second end caps 702 have through holes for the cables 1 to pass through and extend into the inside of the second end caps 702. The inside of the second end caps 702 is the side of the second end caps 702 closest to the housing 701.

[0122] In this embodiment, the outer casing 701 and the second end cap 702 form a relatively enclosed space, which can effectively prevent dust, moisture and other impurities from entering the interior of the safety device. In addition, when maintenance or repair of the safety device is required, the internal components can be easily accessed by simply removing the second end cap 702.

[0123] In some embodiments provided by this utility model, the second end cap 702 includes two assembled shells 7021, which are distributed circumferentially along the end cap and can be spliced ​​to form an annular structure. The annular structure can be fitted onto the outer side of the outer shell 701 and the cable 1. For example, the seam of the assembled shell 7021 extends along the radial direction of the second end cap 702.

[0124] The two assembled shells 7021 form an openable structure. For example, both sides of the two assembled shells 7021 are connected by snap-fit, or both sides of the two assembled shells 7021 are connected by threaded fasteners, or one side of the two assembled shells 7021 is rotatably connected, and the other side is connected by snap-fit ​​or threaded fasteners.

[0125] In this embodiment, during installation, it is not necessary to fit the entire end cap into the outer shell 701 and cable 1 at once. Instead, the two assembled shells 7021 can be placed in appropriate positions and then spliced ​​together. When installing safety devices in narrow spaces, the assembled end cap is easier to operate, which can reduce the difficulty of installation and labor intensity.

[0126] Furthermore, when maintenance, repair, or replacement of components is required for the safety device, the two assembled housings 7021 can be quickly disassembled. Specifically, whether using snap-fit ​​connections, threaded fastener connections, or a combination of one-sided rotation and the other-sided snap-fit ​​or threaded fastener connection, disassembly can be completed relatively easily, saving time and effort and improving maintenance efficiency.

[0127] Furthermore, by adjusting the size and splicing method of the two assembled shells 7021, the second end cap 702 can be adapted to shells 701 and cables 1 with different outer diameters. For example, the second end cap 702 can clamp the shell 701 and the cable 1.

[0128] In some embodiments provided by this utility model, the end cap includes a first connecting portion and a second connecting portion along the axial direction of the end cap.

[0129] The diameter of the first connecting part is smaller than that of the second connecting part. The first connecting part and the second connecting part form a stepped structure. The first connecting part is fitted on the outside of the cable 1, and the second connecting part is fitted on the outside of the outer shell 701.

[0130] In this embodiment, the first connecting part is better fitted to the cable 1, and the second connecting part is better fitted to the housing 701.

[0131] In some embodiments provided by this utility model, the safety device further includes a seal 10. For example, the seal 10 is disposed on the side of the end cap near the housing 701, and the seal 10 is disposed between the housing 701 and the cable 1. Further, seals 10 are provided at both ends of the housing 701. For example, the seal 10 is configured as a sealing ring or a sealing ring.

[0132] In this embodiment, by providing a seal 10 between the housing 701 and the cable 1, the sealing performance between the housing 701 and the cable 1 can be improved, preventing dust or moisture from entering the interior of the housing 701.

[0133] The above describes an embodiment in which the fuse 2 is connected to the cable 1 via the threaded part 5 and the wire harness terminal 8. It is understood that the fuse 2 is not limited to being connected to the cable 1 in the above manner. For example, in other embodiments provided by this utility model, the fuse 2 is crimped to the cable 1. This configuration reduces the number of connecting parts used, resulting in a simple structure and low cost.

[0134] Similarly, the fuse 2 can also be connected to the cable 1 in other ways. For example, in other embodiments provided by this utility model, the safety device also includes a wire harness terminal 8.

[0135] The wire harness terminal 8 includes a connecting section 801 and a sleeve section 802 that are connected to each other. The connecting section 801 is connected to the corresponding cable 1, for example, the connecting section 801 can be crimped with the cable 1.

[0136] The sleeve section 802 is inserted into the fuse 2, that is, the fuse 2 is inserted into the inside of the sleeve section 802 and fits tightly with the sleeve section 802 to ensure circuit continuity. Furthermore, both ends of the fuse 2 are respectively inserted into the corresponding sleeve sections 802.

[0137] In this embodiment, the sleeve section 802 is used for plug-in connection of the fuse 2, so that the fuse 2 can be disassembled and replaced when it is replaced.

[0138] Optionally, multiple through slots may be provided on the side wall of the sleeve section 802.

[0139] Multiple through grooves are distributed circumferentially along the sleeve section 802, penetrating the sidewall of the sleeve section 802 along its wall thickness direction. Simultaneously, along the axial direction of the sleeve section 802, the through grooves penetrate the end of the sleeve section 802 closest to the fusible element 2. This improves the elastic deformation performance of the sleeve section 802, allowing it to clamp the fusible element 2 more tightly.

[0140] In some embodiments provided by this utility model, the safety device further includes a limiting block 9.

[0141] A limiting block 9 is disposed at the end of the cable 1. The limiting block 9 is located within the safety device and is used to limit the shielding structure 4 in the axial direction of the cable 1. Furthermore, limiting blocks 9 are provided at both ends of the shielding structure 4.

[0142] In this embodiment, the limiting block 9 limits the shielding structure 4 along the axial direction of the cable 1, which can prevent the shielding structure 4 from moving along the axial direction of the cable 1 and improve the stability of the safety device.

[0143] Optionally, the limiting block 9 is disposed between the first end cover 402 and the second end cover 702, and in the axial direction of the cable 1, it respectively limits and cooperates with the first end cover 402 and the second end cover 702.

[0144] In this embodiment, the second end cap 702 is fixed to the cable 1 in a stable position. The limiting block 9 engages with the second end cap 702 to ensure a stable position. The limiting block 9 also engages with the first end cap 402 to ensure a stable position. The first end cap 402 is connected to the shielding shell 401, thus ensuring a stable position for the shielding shell 401.

[0145] Furthermore, sealing elements 10 are provided between the limiting block 9 and the outer casing 701, and between the limiting block 9 and the cable 1. This not only provides a limiting effect for the shielding structure 4 through the limiting block 9, but also ensures the sealing effect between the limiting block 9 and the cable 1, and between the limiting block 9 and the outer casing 701.

[0146] This utility model also provides a wire harness assembly.

[0147] Specifically, the wiring harness assembly includes a first cable, a second cable, and the aforementioned safety device.

[0148] Both the first cable and the second cable have a shielding layer 101. Both the first cable and the second cable are connected to the fuse 2, that is, the two ends of the fuse 2 are connected to the first cable and the second cable respectively.

[0149] It should be noted that the wiring harness assembly includes a safety device, and therefore also includes all the advantages of the safety device mentioned above.

[0150] This utility model also provides a vehicle.

[0151] Specifically, the vehicle includes the safety device described above or the wiring harness assembly described above.

[0152] It should be noted that the vehicle includes safety devices, and therefore also includes all the advantages of the aforementioned safety devices, so this will not be elaborated further.

[0153] It should also be noted that the vehicles include, but are not limited to, vehicles and aircraft. Vehicles can be either pure electric vehicles or hybrid vehicles.

[0154] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A safety device, characterized in that, For connecting two cables (1) with shielding layers (101), the safety device includes: A fuse (2) is connected to each of the two cables (1); An insulating structure (3) is provided around the fuse (2) and encloses the fuse (2); A shielding structure (4) is arranged around the insulation structure (3), and both ends of the shielding structure (4) are respectively connected to the shielding layer (101) of the two cables (1).

2. The safety device according to claim 1, characterized in that, The shielding structure (4) includes: The shielding shell (401) is a cylindrical structure and is fitted over the insulating structure (3). The first end cap (402) has two parts. The two first end caps (402) are respectively connected to the two ends of the shielding shell (401), and the two first end caps (402) are respectively connected to the shielding layer (101) of the two cables (1).

3. The safety device according to claim 2, characterized in that, The first end cap (402) is provided with a first annular flange (4021) at one end near the shielding shell (401), and the first annular flange (4021) is inserted into the shielding shell (401); And / or, the first end cap (402) is provided with a second annular flange (4022) at the end away from the shielding shell, and the shielding structure (4) further includes a shielding ring (403), the shielding ring (403) is inserted into the second annular flange (4022), and the shielding layer (101) is sandwiched between the shielding ring (403) and the second annular flange (4022); And / or, the shielding shell (401) is formed by at least two first splicing plates (4011).

4. The safety device according to any one of claims 1-3, characterized in that, The insulation structure (3) is formed by enclosing at least two second splicing plates (301) and forming a cylindrical structure. The shielding structure (4) is used to radially limit the second splicing plates (301). Alternatively, the insulating structure (3) includes a cylinder (302) and a cover (303), the cylinder (302) being fitted onto the outside of the fuse (2), the sidewall of the cylinder (302) having an opening at a position corresponding to the fuse (2), and the cover (303) being detachably covering the opening.

5. The safety device according to claim 4, characterized in that, The safety device also includes a threaded component (5) and a connecting terminal (6). The connecting terminal (6) is disposed within the insulating structure (3) and is connected to the cable (1). The threaded component (5) passes through the connecting terminal (6) and the fuse (2) and is threadedly connected to the insulating structure (3).

6. The safety device according to any one of claims 1-3, characterized in that, The safety device also includes a housing structure (7) which surrounds the shielding structure (4) and whose two ends are respectively connected to the two cables (1).

7. The safety device according to claim 6, characterized in that, The shell structure (7) includes: The outer shell (701) is a cylindrical structure and is fitted over the shielding structure (4); The second end cap (702) has two parts. The two second end caps (702) are respectively closed at both ends of the outer shell (701), and the two second end caps (702) are respectively connected to the two cables (1). The second end cap (702) is provided with a through hole, which is used for the cable (1) to pass through and extend into the inside of the second end cap (702).

8. The safety device according to any one of claims 1-3, characterized in that, The fuse (2) is crimped to the cable (1); Alternatively, the safety device may further include a wiring harness terminal (8), which includes a connecting section (801) and a sleeve section (802) connected to each other, the connecting section (801) being connected to the corresponding cable (1), and the sleeve section (802) being inserted into the fuse (2). Alternatively, the safety device may further include a limiting block (9) disposed at the end of the cable (1), the limiting block (9) being located within the safety device, and the limiting block (9) being used to limit the shielding structure (4) in the axial direction of the cable (1).

9. A wire harness assembly, characterized in that, include: The first cable and the second cable both have a shielding layer (101); The safety device as described in any one of claims 1-8; Both the first cable and the second cable are connected to the fuse (2).

10. A vehicle, characterized in that, Includes the safety device as described in any one of claims 1-8 or the wiring harness assembly as described in claim 9.

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