Fastener, connecting structure, battery device and electric device

Abstract

The utility model relates to the technical field of fastening connection, and discloses a fastener, a connecting structure, a battery device and a power utilization device.The fastener comprises a nail body and a nut, and the nail body is partially arranged in a through hole of a first structural part and a through hole of a second structural part in a penetrating mode; the nut is arranged on the outer side of the nail body in a sleeving mode and is in threaded connection with the nail body, and one side of the nut abuts against the second structural part in the axis direction; the nail body is provided with a first end and a second end in the axis direction of the nail body. The first end is provided with a flange part, the flange part abuts against the first structural part, the second end is provided with a rivet body, and the rivet body is configured to be capable of protruding in the radial direction of the rivet body to form a stop part abutting against the other side of the nut. By means of the connecting structure, two-way constraint on the nut can be formed, rotation and axial movement of the nut are limited, nut loosening is effectively prevented, then structural part movement caused by vibration is avoided, and the axial stability and reliability of connection are improved.

Description

Technical Field

[0001] This application relates to the field of fastening and connection technology, and in particular to fasteners, connection structures, battery devices and electrical devices. Background Technology

[0002] New energy batteries are being used more and more widely in daily life and industry, for example, in electric aircraft. The batteries for electric aircraft typically consist of multiple battery modules, a battery management system, electrical connectors, a thermal management system, and a casing. Fasteners are usually required to achieve mechanical connections between these components, as well as electrical connections, sealing, and protection.

[0003] Electric aircraft face extremely complex and harsh environmental conditions during operation, such as strong vibrations, huge impacts, drastic temperature changes, and high humidity. In application scenarios, environmental factors may cause bolt connections to loosen, posing a risk of connection failure. Therefore, improving the connection reliability and tightening capability of fasteners is one of the research and development topics in the industry. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a fastener, a connection structure, a battery device, and an electrical device.

[0005] This application is achieved through the following technical solution.

[0006] A first aspect of this application provides a fastener for connecting overlapping first and second structural members. The fastener includes a nail body and a nut. The nail body is partially disposed in a through hole in the first structural member and a through hole in the second structural member. The nut is sleeved on the outside of the nail body and threadedly connected to the nail body. Along the axial direction of the nail body, one side of the nut abuts against the second structural member. Along the axial direction, the nail body has a first end and a second end. The first end has a flange portion that abuts against the first structural member. The second end has a rivet body configured to protrude radially along the nail body to form a stop portion that abuts against the other side of the nut.

[0007] In the technical solution of this application embodiment, since the rivet body can deform to form a protruding stop, the nut is threadedly connected to the nail body and axially locked by the stop. Therefore, after installation, the nut cannot rotate relative to the nail body, thus locking the thread engagement and restricting the rotation and axial movement of the nut. This fixes the nut between the stop and the second structural component, forming a bidirectional constraint, effectively preventing the nut from loosening. Consequently, the two structural components are firmly restricted within the axial range, avoiding structural component movement caused by vibration, and improving the axial stability and reliability of the connection. In addition, the stop is formed by the radial protrusion of the rivet body, and the contact surface with the nut is an annular surface, resulting in uniform stress distribution and improved service life.

[0008] In some embodiments, the nail body includes a sleeve and the rivet body, with the flange portion provided at one end of the sleeve along the axial direction and the other end detachably connected to the rivet body.

[0009] In the technical solution of this application embodiment, since the nail body includes a sleeve and a rivet body, and the sleeve and rivet body are detachably connected, the fastener can be disassembled by separating the two during maintenance without damaging the overall structure. The sleeve is reusable, facilitating maintenance and replacement and reducing maintenance costs. Furthermore, the sleeve and rivet body can be combined during installation, simplifying the assembly process. Additionally, the detachable connection supports secondary adjustments. If poor thread engagement or excessive axial clearance is found during assembly, the rivet body can be removed, the nut retightened, or the nail position adjusted, avoiding overall scrap due to riveting assembly errors and improving the assembly pass rate.

[0010] In some embodiments, the rivet body includes a threaded portion that is threadedly connected to the inner wall of the sleeve.

[0011] In the technical solution of this application embodiment, since the rivet body is threadedly connected to the inner wall of the sleeve through the threaded part, the self-locking property of the thread engagement can resist vibration and impact, thus reducing the risk of relative rotation or axial movement between the rivet body and the sleeve and improving the connection stability; in addition, the disassembly method is screwing, which avoids mechanical damage to the inner wall of the sleeve and the through hole of the structural component during disassembly, protects the connection interface, and facilitates subsequent reassembly.

[0012] In some embodiments, the rivet is engaged with the inner wall of the sleeve.

[0013] In the technical solution of this application embodiment, since the rivet body is engaged with the inner wall of the sleeve, connection and disassembly can be achieved by applying axial pressure to push in or pull out, thereby improving assembly and disassembly efficiency. Simultaneously, the engaging structure can withstand axial force during riveting, preventing accidental detachment of the rivet body and facilitating the stable formation of the stop portion.

[0014] In some embodiments, one of the rivet and the sleeve is provided with a locking groove, and the other is provided with a protrusion, wherein the locking groove and the protrusion are engaged and connected.

[0015] In the technical solution of this application embodiment, the engagement of the protrusion with the engaging groove forms a mechanical stop, restricting the axial movement of the rivet body and providing reliable connection strength. Furthermore, during assembly, the protrusion can precisely engage with the engaging groove, improving the coaxiality of the rivet body and the sleeve, and avoiding the risk of uneven riveting deformation and reduced clamping force.

[0016] In some embodiments, the nut includes any one of a hexagonal nut, a press-fit nut, or a pull-fit nut.

[0017] In the technical solution of this application embodiment, since the nut includes any one of hexagonal nut, press-fit nut, and pull-fit nut, the fastener can be flexibly selected according to the material, thickness, assembly space, and stress conditions of the structural component, which improves the applicability and flexibility of the fastener and reduces the cost of designing special fasteners for different scenarios.

[0018] In some embodiments, the fastener includes a core, the nail body having an inner hole extending along the axial direction, and at least a portion of the core passing through the inner hole and sealing the inner hole.

[0019] In the technical solution of this application embodiment, since the nail body has an inner hole that runs through the axial direction, and at least part of the nail core passes through the inner hole and seals the inner hole, the axial tension can be accurately applied by clamping the nail core with a tool during riveting, so that the rivet body deforms uniformly from the preset position, avoiding eccentric deformation caused by external force, and improving the assembly qualification rate and the forming accuracy of the stop part; in addition, the nail core seals the inner hole to prevent moisture and corrosive media from entering the interior of the nail body or passing through the structural parts, extending the service life of the fastener in a humid and dusty environment, and protecting the structural parts.

[0020] In some embodiments, the rivet core has a pressing portion that abuts against the end of the rivet body away from the sleeve; along the radial direction, the diameter of the pressing portion is not less than the outer diameter of the end of the rivet body away from the sleeve.

[0021] In the technical solution of this application embodiment, since the rivet core has a pressing part that abuts against the end of the rivet body away from the sleeve, the pressing part can fully cover the end face of the rivet body during riveting, applying a uniform radial expansion force. This facilitates the uniform radial extension of the rivet body, forming a dimensionally stable and regularly shaped stop. The regular stop has a flat contact surface with the nut, distributing the load evenly and preventing the nut from tilting or experiencing excessive stress at a single point, thus improving the anti-loosening reliability and service life of the fastener.

[0022] In some embodiments, the nail core is threadedly connected to the nail body.

[0023] In the technical solution of this application embodiment, since the nail core is threadedly connected to the nail body, the nail core can be firmly fixed in the inner hole by screwing before riveting, which avoids the nail core falling off during transportation or assembly, improves assembly continuity and assembly efficiency; and the nail core can be disassembled after installation, so that the inner hole connects the space on both sides of the plate, adapts to various installation requirements, and improves flexibility.

[0024] In some embodiments, the nail core has a neck groove extending circumferentially.

[0025] In the technical solution of this application embodiment, since the rivet core has a necking groove extending circumferentially, the rivet core deforms under a certain tensile force during riveting and breaks at the necking groove position, thus completing the riveting process. The necking groove can control the stress distribution when the rivet core breaks, allowing the rivet body to deform sufficiently during the riveting process, and the breakage of the rivet core indicates that the riveting is complete.

[0026] A second aspect of this application provides a connection structure. In some embodiments, the connection structure includes a first structural member and a second structural member stacked along the axial direction, as well as the fastener described in the first aspect of this application; the first structural member includes a first plate, and the second structural member includes a second plate.

[0027] In the technical solution of this application embodiment, a connection structure with reliable connection capability and fastening force can be provided. The first plate and the second plate are firmly clamped by fasteners, which restricts the movement of the plates along the axial direction and the relative rotation in the circumferential direction, avoids the displacement of the plates caused by vibration, improves the overall stability of the connection structure, and improves the anti-loosening and anti-vibration capability of the fastening connection. Furthermore, since the fasteners can be disassembled, the disassembly efficiency during the maintenance of the connection mechanism can also be improved.

[0028] A third aspect of this application provides a battery device, which in some embodiments includes the fastener described in the first aspect of this application or the connection structure described in the second aspect of this application.

[0029] A fourth aspect of this application provides an electrical device, which in some embodiments includes the battery device described in the third aspect of this application, the battery device being used to provide electrical energy.

[0030] In some embodiments, the electrical device includes an aircraft.

[0031] In the technical solution of this application embodiment, since the electrical device is an aircraft, the aircraft using fasteners can resist extreme working conditions such as strong vibration, frequent temperature changes, and high altitude and high humidity. This is beneficial to improving the connection stability between the various structural components of the aircraft and the battery device, and reducing the flight safety risks caused by fastener loosening. In addition, since the nut type and connection method of the fasteners are flexible, the aircraft can be adapted to different specifications of fasteners according to the structural requirements of different parts, which improves the flexibility of structural design.

[0032] The beneficial effects of this disclosure include: This application enables bidirectional constraint on the nut in the axial direction, restricting the nut's rotation and axial movement, effectively preventing nut loosening, and thus avoiding structural component movement caused by vibration, improving the axial stability and reliability of the connection. Furthermore, the stop portion is formed by radial protrusions of the rivet body, and its contact surface with the nut is annular, resulting in uniform stress distribution and improved service life.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 Schematic diagrams of the structure of the nail body after riveting provided for some embodiments of this application;

[0036] Figure 2 Schematic diagrams of the nail body provided for some embodiments of this application;

[0037] Figure 3 Schematic diagrams of the battery device provided for some embodiments of this application;

[0038] Figure 4 Schematic diagrams of the connection structures provided for some embodiments of this application;

[0039] Figure 5 Schematic diagrams of the sleeve structure provided for some embodiments of this application;

[0040] Figure 6 A schematic diagram from another perspective of the connection structure provided for some embodiments of this application;

[0041] Figure 7 The diagram shows the connection structure provided for some other embodiments of this application.

[0042] Explanation of reference numerals in the attached figures

[0043] 100. Fastener; 10. Nail body; 20. Nut; 11. Flange; 12. Inner hole; 200. First structural component; 300. Second structural component; 30. Sleeve; 31. Protrusion; 40. Rivet body; 41. Stop; 42. Threaded part; 43. Engaging groove; 50. Nail core; 51. Extrusion part; 52. Neck break groove; 400. Connecting structure; 1000. Battery device; 1001. Battery cell; 1002. Box assembly; 1002A. Cover; 1002B. Base plate. Detailed Implementation

[0044] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in this document and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0049] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including cases of being approximately parallel and approximately perpendicular.

[0053] The following is a detailed description of this application.

[0054] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0055] In related technologies, new energy batteries can be applied to electric aircraft. The batteries in electric aircraft typically consist of multiple battery modules, a battery management system, electrical connectors, a thermal management system, and a casing. Fasteners are usually required to achieve mechanical connections between these components, as well as electrical connections, sealing, and protection. New energy batteries are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0056] Electric aircraft face extremely complex and harsh environmental conditions during operation, such as strong vibrations, huge impacts, drastic temperature changes, and high humidity. In actual operating scenarios, environmental factors may cause bolt connections to loosen, posing a risk of connection failure. Therefore, improving the connection reliability and tightening capability of fasteners is one of the research topics in the industry.

[0057] Through research and design, the fastener utilizes a nut to lock a blind rivet, which rivets the structural component and clamps the nut on the nut surface, thereby improving the fastener's anti-loosening performance and connection reliability.

[0058] Based on this design concept, this application designs a fastener including a nail body and a nut. The nail body is inserted into a through hole in a first structural member and a through hole in a second structural member. The nut is sleeved on the outside of the nail body and threadedly connected to the nail body. Along the axial direction of the nail body, one side of the nut abuts against the second structural member. Along the axial direction, the nail body has a first end and a second end. The first end has a flange portion that abuts against the first structural member, and the second end has a rivet body that is configured to protrude radially along the nail body to form a stop portion that abuts against the other side of the nut.

[0059] In the technical solution of this application embodiment, since the rivet body can deform to form a protruding stop, the nut is threadedly connected to the nail body and axially locked by the stop. Therefore, after installation, the nut cannot rotate relative to the nail body, thus locking the thread engagement and restricting the rotation and axial movement of the nut. This fixes the nut between the stop and the second structural component, forming a bidirectional constraint, effectively preventing the nut from loosening. Consequently, the two structural components are firmly restricted within the axial range, avoiding structural component movement caused by vibration, and improving the axial stability and reliability of the connection. In addition, the stop is formed by the radial protrusion of the rivet body, and the contact surface with the nut is an annular surface, resulting in uniform stress distribution and improved service life.

[0060] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0061] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0062] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0063] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0064] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0065] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0066] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0067] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0068] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0069] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0070] Below, refer to Figures 1 to 7 Some embodiments of this application will be described in detail.

[0071] Figure 1 Schematic diagrams of the structure of the nail body after riveting provided for some embodiments of this application; Figure 2 Schematic diagrams of the nail body provided for some embodiments of this application; Figure 3 Schematic diagrams of the battery device provided for some embodiments of this application; Figure 4 Schematic diagrams of the connection structures provided for some embodiments of this application; Figure 5 Schematic diagrams of the sleeve structure provided for some embodiments of this application; Figure 6 A schematic diagram from another perspective of the connection structure provided for some embodiments of this application; Figure 7 The diagram shows the connection structure provided for some other embodiments of this application.

[0072] In some embodiments of this application, for ease of explanation, an axial direction and a radial direction are defined, wherein the axial direction and the radial direction are intersecting each other; here, intersecting each other includes perpendicularly intersecting each other. For ease of understanding of the embodiments of this application, in... Figure 1 In the embodiment shown in Figure 7, an example is given where the axial direction and the radial direction intersect each other perpendicularly. However, those skilled in the art should understand that the embodiments of this application are not limited to the case where the two directions intersect each other perpendicularly. For ease of explanation, as follows... Figure 1 As shown by the arrows in Figure 7, the direction of arrow Z is taken as the axial direction, and the direction of arrow X is taken as the radial direction. Sometimes, the direction pointed to by arrow Z along the third direction is called "up," and its opposite direction is called "down."

[0073] A first aspect of this application provides a fastener 100 for connecting a first structural member 200 and a second structural member 300 that are stacked together. In an embodiment of this application, the fastener 100 includes a nail body 10 and a nut 20. The nail body 10 is partially inserted into a through hole in the first structural member 200 and a through hole in the second structural member 300. The nut 20 is sleeved on the outside of the nail body 10 and threadedly connected to the nail body 10. Along the axial direction (Z), one side of the nut 20 abuts against the second structural member 300. Along the axial direction (Z), the nail body 10 has a first end and a second end. The first end has a flange portion 11 that abuts against the first structural member 200. The second end has a rivet body 40, which is configured to protrude radially (X) along the nail body 10 to form a stop portion 41 that abuts against the other side of the nut 20.

[0074] Understandably, fastener 100 is a mechanical connecting element used to secure two or more structural components together.

[0075] Optionally, in this design, fastener 100 is specifically designed to be anti-loosening and removable, and its material can be selected from high-strength steel, stainless steel, or titanium alloy to withstand vibration, shock, and temperature changes in aircraft operating conditions. Since the aircraft is weight-sensitive, fastener 100 may employ a lightweight design, such as using aluminum alloy or composite materials, to reduce overall weight while maintaining strength.

[0076] Optionally, the first structural member 200 and the second structural member 300 can be plate-like structures, sheet-like structures, or layered structures. The shape, thickness, and material of the structural members in this embodiment are not limited, as long as they can form through holes.

[0077] It is understood that the nail body 10 is part of the fastener 100, and the nail body 10 is inserted into the through hole of the structural member along the axial direction (Z).

[0078] Optionally, the nail body 10 is made of metal or polymer materials, etc.

[0079] Alternatively, the nail body 10 can be solid or hollow.

[0080] For example, such as Figure 1 , Figure 2 As shown, the nail body 10 may have an inner hole 12 to accommodate the nail core 50. This facilitates assembly using a riveting process.

[0081] For example, the flange 11 is an annular structure formed by the first end of the nail body 10 protruding outward in the radial direction (X).

[0082] Understandably, the first end of the nail body 10 has a flange portion 11, which fits against the outer side of the first structural member 200, dispersing the pressure of the nail body 10 on the structural member. A stable contact surface is formed between the nail body 10 and the first structural member 200, with the flange portion 11 at the first end of the nail body 10 abutting against the first structural member 200, and the rivet body 40 at the second end forming a stop portion 41 through deformation.

[0083] It is understandable that the outer diameter of flange 11 is larger than the outer diameter of the through hole in the structural component.

[0084] Optionally, the contact surface between the flange 11 and the first structural member 200 may be provided with an annular anti-slip groove, serrated texture, or rubber gasket.

[0085] Optionally, the flange 11 may contact the outer plane of the first structural member 200, or it may be disposed in a groove on the surface of the first structural member 200.

[0086] It is understandable that the second end of the nail body 10 is located on the outside of the second structural member 300, that is, on the side opposite to the first structural member 200.

[0087] It is understood that in the embodiments of this application, the fastener 100 can be installed by riveting process, and a part of the nail body 10 can be squeezed to form a stop part 41.

[0088] For example, such as Figure 2 As shown, a portion of the nail body 10 (i.e., the rivet body 40) is more easily deformable, for example, as a thin-walled portion (thinner wall thickness) or a pre-defined curved surface or a material with more easily deformable plasticity. This portion can be deformed during the riveting installation process to form a stop portion 41.

[0089] For example, such as Figure 1 As shown, after riveting deformation, the stop part 41 can be in the shape of an annular disc, with its inner side fixed to the nail body 10, and its contact surface with the nut 20 is a flat surface or a slightly convex curved surface.

[0090] Optionally, the outer diameter of the stop portion 41 is greater than the outer diameter of the nut 20, or the outer diameter of the stop portion 41 is equal to the outer diameter of the nut 20, or the outer diameter of the stop portion 41 may be less than the outer diameter of the nut 20.

[0091] Alternatively, the nail body 10 can be made of stainless steel, aluminum alloy, or titanium alloy.

[0092] Optionally, the surface of the nail body 10 may be coated to prevent corrosion or scratches.

[0093] It is understood that the nail body 10 is roughly a cylindrical rod with an axial direction (Z) and a radial direction (X). The formed stop portion 41 surrounds the nail body 10.

[0094] Optionally, the nail body 10 can be a one-piece design or a split design. A split nail body 10 can include multiple parts, such as a sleeve 30 and a rivet body 40.

[0095] Understandably, at least a portion of the nail body 10 protrudes from the through hole of the second structural member 300, and the protruding portion forms an external thread on the outer wall for assembly with the nut 20.

[0096] It is understandable that after the nut 20 and the nail body 10 are assembled with external threads, they press against the surface of the second structural component 300.

[0097] For example, such as Figure 4 , Figure 7 As shown, the nut 20 is coaxially sleeved on the outside of the nail body 10, located between the second structural member 300 and the stop part 41 along the axial direction (Z), and its internal thread is fully engaged with the external thread of the nail body 10.

[0098] Optionally, the internal and external threads can be fine threads or coarse threads.

[0099] For example, the material of the nut 20 matches the material of the nail body 10 to avoid electrochemical corrosion, such as carbon steel, titanium alloy, etc. For high corrosion scenarios, the nut 20 can be selected with surface zinc plating or chrome plating treatment.

[0100] In the technical solution of this application embodiment, since the nut 20 is threadedly connected to the nail body 10 and axially locked by the stop part 41, the nut 20 cannot rotate relative to the nail body 10 after installation, thereby locking the thread engagement and restricting the rotation and axial movement of the nut 20. This fixes the nut 20 between the stop part 41 and the second structural member 300, forming a bidirectional constraint, effectively preventing the nut 20 from loosening. Consequently, the two structural members are firmly restricted within the axial range, avoiding structural member movement caused by vibration, and improving the axial stability and reliability of the connection. In addition, the stop part 41 is formed by the radial (X) protrusion 31 of the rivet body 40, and the contact surface with the nut 20 is annular, resulting in uniform stress distribution and improved service life.

[0101] In the embodiments of this application, the nail body 10 includes a sleeve 30 and a rivet body 40. Along the axial direction (Z), one end of the sleeve 30 is provided with a flange portion 11, and the other end is detachably connected to the rivet body 40.

[0102] For example, such as Figure 5 As shown, the sleeve 30 has a hollow rod-shaped structure, with a flange 11 at one end and a detachable connection to the rivet body 40 at the other end, providing an assembly reference for the rivet body 40. The detachable connection allows the sleeve 30 to be reused, reducing costs.

[0103] For example, such as Figure 4 , Figure 7As shown, the nail body 10 passes through the structural member, and one end protruding from the second structural member 300 is detachably connected to the rivet body 40.

[0104] Optionally, detachable connections include threaded connections, snap-fit ​​connections, magnetic connections, etc. It is understood that different connection methods are suitable for different scenarios; threaded connections are suitable for strong vibrations, while snap-fit ​​connections are suitable for mass assembly.

[0105] For example, the nail body 10 may be a hollow bolt with external threads on its outer wall.

[0106] It is understood that the sleeve 30 is coaxially inserted through the through holes of the first structural member 200 and the second structural member 300. Its wall thickness can be adjusted according to the load-bearing requirements, and this embodiment does not limit this.

[0107] Alternatively, the nail body 10 can be made of steel or titanium alloy, and the inner and outer surfaces can be chrome-plated to improve wear resistance.

[0108] It is understandable that the rivet body 40 is coaxially assembled at the end of the sleeve 30 away from the flange 11 and is connected to the sleeve 30. The deformed part is located on the side away from the sleeve 30 and is formed by radial (X) deformation through the riveting process to form the stop part 41, which abuts against the nut 20.

[0109] Understandably, a portion of the rivet body 40 is deformed into a stop portion 41 after riveting.

[0110] Optionally, the rivet body 40 may be made of a material that is easily deformable and tough, such as copper or aluminum alloy.

[0111] Alternatively, the material of the rivet 40 may be different from that of the nail body 10.

[0112] Optionally, the rivet body 40 may be provided with an annular groove (thinned) to facilitate the riveting to form a stop part 41. During riveting, the rivet body is precisely deformed along the groove to avoid deformation eccentricity and improve the dimensional consistency of the formed stop part 41.

[0113] In the technical solution of this application embodiment, since the nail body 10 includes a sleeve 30 and a rivet body 40, and the sleeve 30 and the rivet body 40 are detachably connected, the fastener 100 can be disassembled by separating the two during maintenance without damaging the overall structure. The sleeve 30 is reusable, which facilitates maintenance and replacement and reduces maintenance costs. Furthermore, the sleeve 30 and the rivet body 40 can be combined and installed during installation, simplifying the assembly steps. In addition, the detachable connection supports secondary adjustment. If poor thread engagement or excessive axial clearance is found during assembly, the rivet body 40 can be removed and the nut 20 can be retightened or the position of the nail body 10 can be adjusted, avoiding overall scrap caused by riveting assembly errors and improving the assembly qualification rate.

[0114] In the embodiments of this application, such as Figure 7As shown, the rivet body 40 includes a threaded portion 42, which is threadedly connected to the inner wall of the sleeve 30.

[0115] It is understood that the threaded part 42 is an external thread, and the inner wall of the sleeve 30 is provided with an internal thread that mates with the threaded part 42. The detachable connection is achieved by the engagement of the external thread and the internal thread of the sleeve 30, which is suitable for strong vibration scenarios.

[0116] It is understood that the threaded portion 42 is located at the end of the rivet body 40 near the sleeve 30, and the aforementioned internal thread is located at the end of the sleeve 30 near the rivet body 40.

[0117] Optionally, the threaded portion 42 may include a fine thread, a coarse thread, or a locking thread, which is matched by the internal thread of the sleeve 30.

[0118] In the technical solution of this application embodiment, since the rivet 40 is threadedly connected to the inner wall of the sleeve 30 through the threaded part 42, the self-locking property of the thread engagement can resist vibration and impact, thus reducing the risk of relative rotation or axial movement between the rivet 40 and the sleeve 30 and improving the connection stability; in addition, the disassembly method is screwing, which avoids mechanical damage to the inner wall of the sleeve 30 and the through hole of the structural component during disassembly, protects the connection interface, and facilitates subsequent reassembly.

[0119] In the embodiments of this application, the rivet 40 is engaged with the inner wall of the sleeve 30.

[0120] Understandably, the two can be connected via a snap-fit ​​mechanism.

[0121] Alternatively, the engaging structure can be one of the following: engaging groove 43, protrusion 31, hook, buckle, or latch.

[0122] It is understandable that the interlocking structure can be made of a material with a certain degree of elasticity, or its size and shape can facilitate interlocking and separation.

[0123] In the technical solution of this application embodiment, since the rivet body 40 is engaged with the inner wall of the sleeve 30, connection and disassembly can be achieved by applying axial pressure to push in or pull out, thereby improving assembly and disassembly efficiency. At the same time, the engaging structure can withstand axial force during riveting, preventing the rivet body 40 from accidentally disengaging, which is beneficial for the stable formation of the stop part 41.

[0124] In the embodiments of this application, one of the rivet body 40 and the sleeve 30 is provided with a locking groove 43, and the other is provided with a protrusion 31, and the locking groove 43 and the protrusion 31 are engaged and connected.

[0125] For example, such as Figure 4As shown, along the axial direction (Z), the outer peripheral surface of the rivet 40 near the end of the sleeve 30 is provided with a locking groove 43, and the inner wall of the sleeve 30 is provided with a protrusion 31, which is engaged with the locking groove 43.

[0126] It is understandable that the protrusion 31 is a specific implementation of the locking structure, which is set along the circumference of the rivet body 40 or the sleeve 30. It achieves axial limitation by engaging with the locking groove 43 of the sleeve 30, and provides locking force. The structure is simple and easy to assemble.

[0127] Optionally, the protrusions 31 may be in the form of a ring or uniformly distributed blocks.

[0128] Optionally, the protrusion 31 can be separately provided from the sleeve 30 and fixed by means of bonding or other methods, or the protrusion 31 and the sleeve 30 can be integrally formed.

[0129] Alternatively, the cross-section of the protrusion 31 can be trapezoidal, triangular, or semi-circular.

[0130] Optionally, the surface of the protrusion 31 can be smooth or rough. For example, an anti-slip texture can be provided to increase circumferential anti-rotation resistance and prevent loosening of the engagement caused by vibration.

[0131] It is understandable that the engaging groove 43 is an annular groove opened on the rivet body 40 to fit the protrusion 31. By engaging with the protrusion 31, an engaging connection is formed, which can provide a positioning reference and limiting space for the protrusion 31, which is conducive to the stability of the engaging structure.

[0132] Understandably, the shape, depth, and width of the engaging groove 43 match the protrusion 31, which is conducive to proper engagement.

[0133] Optionally, the groove of the engaging groove 43 can be chamfered to facilitate the insertion of the protrusion 31.

[0134] Understandably, during disassembly, a tool can be inserted into the nail body 10 to press against the rivet body 40 or the nail core 50, causing the protrusion 31 to separate from the engagement groove 43, thereby disassembling the rivet body 40 and the nail core 50.

[0135] In the technical solution of this application embodiment, since the protrusion 31 is engaged with the engaging groove 43, a mechanical stop is formed by the engagement of the protrusion 31 and the engaging groove 43, which to a certain extent restricts the axial movement of the rivet body 40 and provides reliable connection strength. Furthermore, during assembly, the protrusion 31 can be precisely engaged into the groove along the axial direction (Z), improving the coaxiality of the rivet body 40 and the sleeve 30 and avoiding uneven deformation during riveting.

[0136] In the embodiments of this application, the nut 20 includes any one of a hexagonal nut, a press-fit nut, and a pull-fit nut.

[0137] It is understandable that a hexagonal nut is a nut with a regular hexagonal outer surface and an internal thread machined in the inner hole 12. During installation, the hexagonal outer surface can be gripped with a wrench and screwed on to achieve a fixed connection with the threaded connection of the nut body 10.

[0138] Optionally, the distance between opposite sides of the hexagonal nut can be set according to the thread specification, and the end face can be chamfered to avoid scratching the structural components.

[0139] Understandably, the hexagonal nut is coaxially sleeved on the outside of the nail body 10, located between the second structural member 300 and the stop part 41.

[0140] Alternatively, the hexagonal nut can be made of carbon steel or stainless steel.

[0141] Optionally, the hex nut may have a flange or an additional washer.

[0142] Understandably, the press-fit nut is a nut that can be fixed to the second structural component 300 by press-fitting process, without the need for welding or threading, thus improving assembly efficiency.

[0143] Optionally, the outer periphery of the press-fit nut is provided with press-fit teeth or press-fit feet to facilitate pressing into the through hole of the structural component.

[0144] Optionally, the rivet nut can be made of carbon steel, stainless steel or aluminum alloy, and can be made of the same material as the second structural component 300.

[0145] For example, such as Figure 4 , Figure 7 As shown, nut 20 is a press-fit nut.

[0146] It is understandable that a rivet nut is a nut 20 that is fixed to a structural component by deforming its tail through a riveting process.

[0147] In the technical solution of this application embodiment, since the nut 20 includes any one of hexagonal nut, press-fit nut, and pull-fit nut, the fastener 100 can be flexibly selected according to the material, thickness, assembly space, and stress conditions of the structural component, which improves the applicability and flexibility of the fastener 100 and reduces the cost of designing special fasteners 100 for different scenarios.

[0148] In the embodiments of this application, such as Figure 4 , Figure 7 As shown, the fastener 100 includes a nail core 50 and a nail body 10 having an inner hole 12 extending along the axial direction (Z). At least a portion of the nail core 50 passes through the inner hole 12 and seals the inner hole 12.

[0149] It should be noted that the rivet core 50 is a rod-shaped component that passes through the inner hole 12 of the rivet body 10. It can provide axial tension for the riveting process, causing the rivet body 40 to deform and form a stop part 41, which is retained and sealed after riveting.

[0150] It is understandable that, along the axial direction (Z), one end of the rivet core 50 can be held by the riveting tool, and the other end is provided with a pressing part 51, which abuts against the rivet body 40 to transmit tension.

[0151] It is understandable that the sleeve 30 and the rivet 40 have a through hole that connects them, forming an inner hole 12.

[0152] Understandably, before riveting, such as Figure 2 As shown, the nail core 50 extends from the inner hole 12 along the axial direction (Z) from the side where the flange part 11 is located. The nail core 50 has a pre-set neck groove 52, which makes it easy to break after riveting.

[0153] Optionally, after the sealing nail core 50 passes through the inner hole 12, the inner hole 12 is isolated from the external environment by the fit between the outer periphery of the nail core 50 and the inner wall of the inner hole 12 or by an additional sealing structure, preventing dust, moisture or corrosive media from passing through. This is also equivalent to separating the environments on both sides of the first structural member 200 and the second structural member 300.

[0154] Optionally, the nail core 50 can be sealed to the inner hole 12 by means of interference fit, threaded connection, etc., or a sealing ring, sealing gasket, or other structure can be provided between the nail core 50 and the inner hole 12.

[0155] Understandably, the inner hole 12 is a hole through the nail body 10 along the axial direction (Z). The inner hole 12 may be a smooth or threaded hole, and its size matches that of the nail core 50.

[0156] In the technical solution of this application embodiment, since the nail body 10 has an inner hole 12 that runs through along the axial direction (Z), and at least part of the nail core 50 passes through the inner hole 12 and seals the inner hole 12, the axial tension can be precisely applied by clamping the nail core 50 with a tool during riveting, so that the rivet body 40 deforms uniformly from the preset position, avoiding eccentric deformation caused by external force, improving the assembly qualification rate and the forming accuracy of the stop part 41; in addition, the nail core 50 seals the inner hole 12 to prevent moisture and corrosive media from entering the interior of the nail body 10 or passing through the structural parts, extending the service life of the fastener 100 in a humid and dusty environment, and protecting the structural parts.

[0157] In the embodiments of this application, the nail core 50 has a pressing portion 51, which abuts against the end of the rivet body 40 away from the sleeve 30; along the radial direction (X), the diameter of the pressing portion 51 is not less than the outer diameter of the end of the rivet body 40 away from the sleeve 30.

[0158] It should be noted that the extrusion part 51 is a structure of the rivet core 50 near the end of the rivet body 40. It transmits the riveting force by abutting against the end of the rivet body 40, so that the force is evenly transmitted to the rivet body 40, and the rivet body 40 is uniformly deformed in the radial direction (X).

[0159] Optionally, the extrusion part 51 can be cylindrical, frustum-shaped, or hemispherical, with the end face in contact with the rivet body 40 being flat, so that it fully fits the rivet body 40.

[0160] It should be noted that in this embodiment, the diameter of the extrusion part 51 is equal to the diameter of the part of the extrusion part 51 that contacts the rivet body 40.

[0161] For example, such as Figure 6 As shown, the maximum diameter of the extrusion section 51 is greater than the outer diameter of the end of the rivet 40 away from the sleeve 30.

[0162] As another example, in some embodiments not shown, the maximum diameter of the pressing part 51 may be smaller than the outer diameter of the end of the rivet body 40 away from the sleeve 30, but larger than the inner diameter of the rivet body 40. In this case, the pressing part 51 can also cause the rivet body 40 to deform and form the stop part 41 during the riveting process.

[0163] In the technical solution of this application embodiment, since the rivet core 50 has a pressing part 51 that abuts against the end of the rivet body 40 away from the sleeve 30, the pressing part 51 can fully cover the end face of the rivet body 40 during riveting, applying a uniform radial (X) expansion force. This is beneficial for driving the rivet body 40 to extend uniformly along the radial (X) direction, forming a dimensionally stable and regularly shaped stop part 41. The regular stop part 41 has a flat contact surface with the nut 20, distributing the load evenly, preventing the nut 20 from tilting or having excessive stress at a single point, thus improving the anti-loosening reliability and service life of the fastener 100.

[0164] In the embodiments of this application, the nail core 50 is threadedly connected to the nail body 10.

[0165] In the technical solution of this application embodiment, since the nail core 50 is threadedly connected to the nail body 10, the nail core 50 can be firmly fixed in the inner hole by screwing before riveting, which avoids the nail core 50 falling off during transportation or assembly, and improves the continuity and efficiency of assembly; and the nail core 50 can be disassembled after installation, so that the inner hole 12 connects the space on both sides of the plate, adapts to various installation requirements, and improves flexibility.

[0166] In an embodiment of this application, the nail core 50 has a necking groove 52 extending circumferentially.

[0167] Understandably, the neck groove 52, also known as the break, can extend along the circumferential direction of the rivet core 50. The riveting tool clamps the rivet core 50, and when the tensile force reaches a preset value, the rivet core 50 breaks at the neck groove 52. Removing the separated part of the rivet core completes the riveting installation.

[0168] In this embodiment, the curvature, depth, and shape of the necking groove 52 are not limited and can be adjusted according to specific circumstances.

[0169] For example, such as Figure 2 As shown, a necking groove 52 is formed on the outer periphery of the rivet core 50. After riveting, the rivet core 50 breaks at the necking groove 52, forming... Figure 1 Fastener 100 is shown.

[0170] In the technical solution of this application embodiment, since the rivet core 50 has a necking groove 52 extending circumferentially, the rivet core 50 deforms the rivet body 40 under a certain tensile force during riveting and breaks at the necking groove 52, thus completing the riveting process. The necking groove 52 can control the stress distribution when the rivet core 50 breaks, allowing the rivet body 40 to deform sufficiently during the riveting process, and the breakage of the rivet core 50 indicates that the riveting is complete.

[0171] The second aspect of this application provides a connection structure 400. In the embodiments of this application, the connection structure 400 includes a first structural member 200 and a second structural member 300 stacked along the axial direction (Z), and a fastener 100 of the first aspect of this application; the first structural member 200 includes a first plate, and the second structural member 300 includes a second plate.

[0172] For example, such as Figure 4 , Figure 6 , Figure 7 As shown, the connection structure 400 includes a first plate and a second plate stacked along the axial direction (Z) and a fastener 100 through which it is fixed. The flange portion 11 and the stop portion 41 of the fastener 100 are located on both sides of the first plate and the second plate, respectively, forming an axial clamping.

[0173] For example, both the first plate and the second plate are flat.

[0174] For example, both the first plate and the second plate are curved panels.

[0175] For example, the through holes of the first plate and the second plate are coaxially aligned.

[0176] Optionally, the first board can be any one of a metal board, a wood board, a polymer board, or a composite material board.

[0177] Optionally, the second plate can be any one of a metal plate, a wood plate, a polymer material plate, or a composite material plate.

[0178] For example, the first plate and the second plate are made of the same material, which is metal plate.

[0179] Optionally, the through holes in the first plate and the second plate can be threaded holes.

[0180] Optionally, the first plate and the second plate can be any one of the cover 1002A, the bottom plate 1002B, the bottom guard plate, and the heat exchange plate.

[0181] For example, in some embodiments not shown, the first plate may be a base plate 1002B and the second plate may be a heat exchange plate.

[0182] As an example, in some embodiments not shown, the first plate may be a base plate 1002B and the second plate may be a bottom protective plate.

[0183] In the technical solution of this application embodiment, a connection structure 400 with reliable connection capability and fastening force can be provided. The first plate and the second plate are firmly clamped by the fastener 100, which restricts the movement of the plate body along the axial direction (Z) and the relative rotation in the circumferential direction, avoids the displacement of the plate body caused by vibration, improves the overall stability of the connection structure 400, and improves the anti-loosening and anti-vibration capability of the fastening connection. Furthermore, since the fastener 100 can be disassembled, the disassembly efficiency during the maintenance of the connection mechanism can also be improved.

[0184] A third aspect of the present application provides a battery device 1000. In the embodiments of the present application, the battery device 1000 includes a fastener 100 of the first aspect of the present application or a connection structure 400 of the second aspect of the present application.

[0185] Exemplarily, housing assembly 1002 may include at least one such Figure 4 or Figure 7 The connection structure 400 shown has a first structural member 200 and a second structural member 300 stacked along the axial direction (Z), and a fastener 100 can fix the two structural members.

[0186] For example, such as Figure 3 As shown, the battery device 1000 includes a housing assembly 1002 and a battery cell 1001 housed inside the housing assembly 1002. The housing assembly 1002 may include a cover 1002A and a base plate 1002B, which can be connected by fasteners 100 to form a closed space inside the housing assembly 1002 to house the battery cell 1001.

[0187] For example, such as Figure 3 As shown, the edge of the cover 1002A can serve as the first structural member 200, and is connected to the edge of the base plate 1002B (i.e., the second structural member 300) via fasteners 100.

[0188] The fourth aspect of this application provides an electrical device, which includes a battery device 1000 from the third aspect of this application, and the battery device 1000 is used to provide electrical energy.

[0189] In embodiments of this application, the electrical device includes an aircraft.

[0190] Optionally, the aircraft includes drones, helicopters, fixed-wing aircraft, etc., and the fastener 100 can adapt to changes in the operating environment and lightweight requirements of the aircraft.

[0191] Alternatively, in addition to the battery device 1000, the fastener 100 can also be applied to the fuselage, wings, and tail.

[0192] In the technical solution of this application embodiment, since the electrical device is an aircraft, the aircraft using fasteners 100 can resist extreme working conditions such as strong vibration, frequent temperature changes, and high altitude and high humidity. This is beneficial to improving the connection stability between the various structural components of the aircraft and the battery device 1000, and reducing the flight safety risk caused by the loosening of fasteners 100. In addition, since the type and connection method of the nuts 20 of the fasteners 100 are flexible, the aircraft can be adapted to different specifications of fasteners 100 according to the structural requirements of different parts, which improves the flexibility of structural design.

[0193] The specific solutions of the embodiments of this application are described below with reference to the accompanying drawings.

[0194] During aircraft operation, conditions such as vibration, impact, temperature changes, and humidity can lead to bolt loosening hazards. To address the high-security bolt requirements of aircraft, a fastener 100 is provided that is both anti-loosening and easy to disassemble. This reduces or even eliminates the risk of bolt loosening during aircraft operation, preventing hazards caused by loose bolts and protecting the safety of people and property. Furthermore, the fastener 100's easy-to-disassemble function facilitates subsequent maintenance and repair of the aircraft, improving efficiency and reducing costs.

[0195] In a specific embodiment, the fastener 100 involved in this solution can connect two plates, such as a first plate and a second plate. Along the axial direction (Z) of the nail body 10, the sleeve 30, the rivet body 40, and the nail core 50 are connected in sequence. The sleeve 30 and the rivet body 40 are separately provided and can be detachably connected. The sleeve 30 extends into the through hole of the plate body, with a protruding part. The protruding part is threadedly connected to the nut 20. After riveting, the stop part 41 presses against the surface of the nut 20.

[0196] In a specific embodiment, the sleeve 30 is designed with a thread length according to the actual interface requirements, which satisfies the interface engagement length requirements and does not exceed the interface of the nut 20 (or other internal thread interfaces).

[0197] In a specific embodiment, the rivet core 50 is connected to the rivet body 40 via an external thread and an internal thread at the lower end, locking the rivet core 50 and the rivet body 40. In use, the interface can be first tightened using the external thread of the sleeve 30 and the nut 20 used at the interface, completing the assembly of the fastener 100. Then, the rivet core 50 is clamped using an assembly tool, and a pulling force is applied, causing the rivet body 40 to extend outwards and deform, forming a stop 41, thus completely locking the fastener 100. After riveting and locking, the rivet core 50 is broken off, and the unused screw (i.e., the broken part of the rivet core 50) is removed, completing the interface anti-loosening locking.

[0198] When disassembly, maintenance, or repair is required, if the rivet body 40 and sleeve 30 are assembled via a snap-fit ​​structure, an iron rod or similar object can be inserted into the sleeve 30 to apply downward pressure and push out the rivet core 50 and rivet body 40, thus disassembling the fastener 100. If the rivet body 40 and sleeve 30 are assembled via a threaded connection, the rivet core 50 and rivet body 40 can be disassembled by unscrewing, thus disassembling the fastener 100.

[0199] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0200] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0201] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of protection claimed in this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of protection claimed.

Claims

1. A fastener for connecting overlapping first and second structural members, characterized in that, The fastener comprises a nail body and a nut, the nail body is partially arranged in the through hole of the first structural member and the through hole of the second structural member; the nut is arranged outside the nail body and is threadedly connected with the nail body, one side of the nut abuts against the second structural member along the axial direction of the nail body; the nail body has a first end and a second end along the axial direction; the first end has a flange portion which abuts against the first structural member, and the second end has a rivet body which is configured to protrude radially along the nail body to form a stop portion which abuts against the other side of the nut.

2. The fastener of claim 1, wherein, The nail body comprises a sleeve and the rivet body, one end of the sleeve is provided with the flange portion, and the other end is detachably connected with the rivet body along the axial direction.

3. The fastener of claim 2, wherein, The rivet body comprises a threaded portion which is threadedly connected with the inner wall of the sleeve.

4. The fastener of claim 2, wherein, The rivet body is snap-connected with the inner wall of the sleeve.

5. The fastener of claim 4, wherein, The rivet body and the sleeve are provided with a snap groove and a protrusion respectively, and the snap groove is snap-connected with the protrusion.

6. The fastener of any one of claims 1 to 5, wherein, The nut comprises any one of a hexagonal nut, a press-in rivet nut, and a pull-in rivet nut.

7. The fastener of any one of claims 2 to 5, wherein, The fastener comprises a nail core, the nail body is provided with an inner hole which penetrates through along the axial direction, and at least part of the nail core is arranged in the inner hole and seals the inner hole.

8. The fastener of claim 7, wherein, The nail core has a pressing portion which abuts against one end of the rivet body which is away from the sleeve; along the radial direction, the diameter of the pressing portion is not less than the outer diameter of one end of the rivet body which is away from the sleeve.

9. The fastener of claim 7, wherein, The nail core is threadedly connected with the nail body.

10. The fastener of claim 7, wherein, The nail core has a neck-breaking groove which extends along the circumferential direction.

11. A connection structure characterized by comprising: The connection structure comprises the first structural member and the second structural member which are arranged in a stack along the axial direction, and the fastener according to any one of claims 1 to 10; the first structural member comprises a first plate, and the second structural member comprises a second plate.

12. A battery device characterized by comprising: The connection structure comprises the fastener according to any one of claims 1 to 10 or the connection structure according to claim 11.

13. An electrical device, characterized by The battery device according to claim 12 is used to provide electric energy.

14. The powered device of claim 13, wherein, The electric device comprises an aircraft. The electric device comprises an aircraft.

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