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 is used for connecting a first structural part and a second structural part which are overlapped, the fastener comprises a flange part and a nail body which are connected in the first direction, at least part of the nail body is arranged in a through hole of the first structural part and a through hole of the second structural part in a penetrating mode, and the flange part abuts against the surface of one side of the first structural part; the nail body comprises at least one clamping part, at least part of the clamping part abuts against the surface of the side, away from the first structural part, of the second structural part in the first direction, the flange part and the clamping part clamp the first structural part and the second structural part, and the clamping part can rotate around a rotating shaft perpendicular to the first direction. By means of the fastening piece, reliable connection and fixation between structural parts can be achieved, the fastening piece has good anti-loosening and anti-vibration capacity, and the stability of the fastening piece in long-term use is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fastening connection, in particular to a fastener, a connection structure, a battery device and an electric device. BACKGROUND

[0002] New energy batteries are increasingly widely used in life and industry, for example, can be applied to electric aircraft. The battery of the electric aircraft is usually composed of multiple battery modules, a battery management system, an electrical connector, a thermal management system, and a box body. The fastener is usually used to realize mechanical connection between the parts, and also to realize electrical connection, sealing and protection.

[0003] The electric aircraft faces extremely complex and harsh environmental conditions during operation, such as strong vibration, great impact, severe temperature change, and high humidity. In the application scenario, environmental factors can cause the bolt connection to loosen, and there is a risk of connection failure. Therefore, improving the connection reliability and fastening ability of the fastener is one of the research topics in the industry. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the present application provides a fastener, a connection structure, a battery device and an electric device.

[0005] The present application is implemented by the following technical solutions.

[0006] The first aspect of the embodiment of the present application provides a fastener for connecting a first structure and a second structure, in some embodiments, the fastener includes a flange portion and a nail body connected in a first direction, at least part of the nail body is arranged in the through hole of the first structure and the through hole of the second structure, and the flange portion abuts against one side surface of the first structure; the nail body includes at least one clamping portion, at least part of the clamping portion abuts against one side surface of the second structure away from the first structure in the first direction, the flange portion and the clamping portion clamp the first structure and the second structure, and the clamping portion is configured to be able to rotate around a rotation shaft perpendicular to the first direction.

[0007] In the technical solution of the embodiment of the present application, the fastener forms a two-way clamping of the first structure and the second structure through the flange portion and the clamping portion, so as to effectively limit the movement of the fastener in the first direction, so that the fastener is not easy to loosen or separate under the working conditions of aircraft vibration, impact, temperature and humidity change, and the fastening ability and connection reliability of the fastener are improved. In addition, the clamping portion can rotate, which facilitates the disassembly and installation of the fastener.

[0008] In some embodiments, the nail body comprises a straight rod portion connected with the flange portion and a bent portion, the bent portion is arranged obliquely relative to the straight rod portion, one end of the bent portion is connected with the straight rod portion, and the other end of the bent portion is connected with the clamping portion, and the bent portion comprises the rotating shaft.

[0009] In the technical scheme of the embodiments of the present application, since the nail body is provided with the bent portion obliquely arranged, one end of which is connected with the straight rod portion and the other end of which is connected with the clamping portion, when the clamping portion is pressed during assembly, the bent portion can be adaptively deformed under external force, the clamping portion is guided to be bent as expected, and the clamping portion is driven to abut against the surface of the second structural member. The bent portion, as a transition region connecting the clamping portion and the straight rod portion, can reduce the risk of breakage when the clamping portion is deformed.

[0010] In some embodiments, along the thickness direction of the bent portion, the side of the bent portion away from the second structural member is convexly formed with a transition fillet.

[0011] In the technical scheme of the embodiments of the present application, since the bent portion is formed with an arc-shaped transition, the stress generated by the bent portion can be more smoothly transmitted and distributed during the bending of the clamping portion, the risk of deformation and breakage is further reduced, the fatigue life of the fastener is improved. In addition, the initial position of the clamping portion is closer to the center line of the nail body before deformation during assembly, which facilitates the passing through the through hole and improves the assembly convenience, and sufficient deformation space is reserved for the bent portion.

[0012] In some embodiments, along the first direction, each clamping portion is recessed inward on the side close to the second structural member to form at least one recessed portion, and the recessed portion extends to the edge of the clamping portion in a direction perpendicular to the first direction.

[0013] In the technical scheme of the embodiments of the present application, since the side of the clamping portion close to the second structural member is provided with the recessed portion, and the recessed portion extends to the edge of the clamping portion in a direction perpendicular to the first direction, the recessed portion forms a gap between the clamping portion and the surface of the second structural member after assembly, a pry bar or other disassembly tool can be directly inserted from the outside when the fastener is disassembled, so that the clamping portion is deformed or damaged again, the disassembly difficulty is reduced, the fastener is easily removed, the disassembly ability of the fastener is improved, and the maintenance cost is reduced.

[0014] In some embodiments, the recessed portion comprises a first recessed portion, and the extension direction of the first recessed portion is consistent with the radial direction of the straight rod portion.

[0015] In the technical scheme of the embodiment of the present application, since the extension direction of the recessed part is consistent with the radial direction of the straight rod part, clear disassembly guidance can be provided for maintenance personnel, and when the disassembly tool is inserted into the recessed part, the stress direction can directly act on the extension end of the clamping part along the radial direction of the straight rod, thereby avoiding tool slippage and damage to the surface of the structural member due to angle deviation, and improving the disassembly efficiency.

[0016] In some embodiments, the recessed part comprises a second recessed part, and the clamping part is bent to form the second recessed part away from one side of the second structural member along the first direction.

[0017] In the technical scheme of the embodiment of the present application, since the clamping part is bent to form the second recessed part away from one side of the second structural member along the first direction, the second recessed part can also expand the gap space between the clamping part and the second structural member, can be adapted to more types of disassembly tools, and can provide more sufficient disassembly space for the disassembly tool. In addition, even if the first recessed part is slightly closed due to assembly deformation, the second recessed part can still retain the disassembly space, thereby improving the flexibility and reliability of the fastener disassembly scheme.

[0018] In some embodiments, the clamping part extends away from the straight rod part along the radial direction of the straight rod part, and the ratio of the size of the clamping part along the radial direction of the straight rod part to the nominal diameter of the straight rod part is in the range of 0.8 to 2.

[0019] In the technical scheme of the embodiment of the present application, since the ratio of the size of the clamping part along the radial direction of the straight rod part to the nominal diameter of the straight rod part is in a suitable range, the clamping force and the space occupation of the fastener can be considered, and the cost and weight can also be effectively controlled, thereby adapting to the lightweight demand of the aircraft.

[0020] In some embodiments, a plurality of clamping parts are uniformly arranged along the circumferential direction of the straight rod part.

[0021] In the technical scheme of the embodiment of the present application, since the plurality of clamping parts are uniformly arranged along the circumferential direction of the straight rod part, the clamping force can be uniformly transmitted to each direction of the second structural member by the clamping part cooperating with the flange part, thereby forming a symmetrical and stable support system around the straight rod part, avoiding vibration loosening caused by insufficient local clamping force, or structural member damage caused by excessive local clamping force, reducing the bending of the nail body caused by uneven stress, and improving the long-term reliability of the connecting structure.

[0022] In some embodiments, the number of clamping parts is not more than 8.

[0023] In the technical scheme of the embodiment of the present application, since the number of clamping parts is controlled to be less than or equal to 8, the processing technology can be simplified, the production difficulty and cost can be reduced, and meanwhile, it is beneficial for the synchronous and uniform deformation of the clamping parts during assembly, thereby avoiding inconsistent deformation caused by excessive number.

[0024] The second aspect of the embodiments of the present application provides a connecting structure, which in some embodiments includes the first structural member and the second structural member arranged in the first direction, and the fastener of the first aspect of the embodiments of the present application; the first structural member includes a first plate, and the second structural member includes a second plate or a nut.

[0025] In the technical solution of the embodiments of the present application, thus, a connecting structure with reliable connecting ability and fastening force can be provided, while the anti-loosening and anti-vibration ability of the connecting structure is improved; and since the fastener can be disassembled, the disassembly efficiency during maintenance of the connecting mechanism can also be improved. In addition, the second structural member can be adapted to the second plate or the nut, which expands the application scenarios of the connecting structure, meets the connection requirements of different scenarios, and enhances the universality of the connecting structure.

[0026] In some embodiments, the pin body is provided with external threads, and the through hole of the first structural member and / or the through hole of the second structural member is provided with internal threads matched with the external threads.

[0027] In the technical solution of the embodiments of the present application, thus, the threaded connection as a reinforcing connection means can effectively avoid axial movement under the clamping action, reduce the deformation stress of the clamping part, and prolong the service life of the fastener; the double fixing structure of the threaded connection and the clamping part further improves the anti-vibration and anti-impact ability of the connection, and also improves the reliability of the connection.

[0028] The third aspect of the embodiments of the present application provides a battery device, which in some embodiments includes the fastener of the first aspect of the embodiments of the present application or the connecting structure of the second aspect of the embodiments of the present application.

[0029] The fourth aspect of the embodiments of the present application provides a power consumption device, which in some embodiments includes the battery device of the third aspect of the embodiments of the present application, and the battery device is used to provide electric energy.

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

[0031] Thus, the requirements of the aircraft for weight and space can be met, and the complex and harsh working environment of the aircraft can be adapted.

[0032] The beneficial effects of the embodiments of the present disclosure include: through the present application, reliable connection and fixation between structural members can be achieved, the fastener has good anti-loosening and anti-vibration ability, and the stability of the fastener during long-term use is improved.

[0033] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0035] Figure 1 Structure diagram of the fastener provided for some embodiments of the present application;

[0036] Figure 2 Structure diagram of the fastener provided for some embodiments of the present application before assembly;

[0037] Figure 3 Half-section diagram of the connecting structure provided for some embodiments of the present application;

[0038] Figure 4 Bottom view of the connecting structure provided for some embodiments of the present application;

[0039] Figure 5 Top view of the connecting structure provided for some embodiments of the present application;

[0040] Figure 6 Structure diagram of the battery device provided for some embodiments of the present application.

[0041] BRIEF DESCRIPTION OF DRAWINGS

[0042] 100, fastener; 200, first structural member; 201, first hole; 300, second structural member; 301, second hole; 10, shank; 20, flange portion; 13, clamping portion; 11, straight rod portion; 12, bent portion; 30, recessed portion; 31, first recessed portion; 32, second recessed portion; 400, connecting structure; 1000, battery device; 1001, battery cell; 1002, box body; 1002A, cover body; 1002B, bottom plate. DETAILED DESCRIPTION

[0043] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0044] 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 be limiting of this application; the use of the terms "including," "comprising," "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0045] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0046] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The occurrence of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment to the other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with each other.

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are "or" relationship.

[0048] In the description of the embodiments of the present application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, operate or be used in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0049] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical term "contact" should be interpreted broadly, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact with each other without interaction force or contact between two objects in contact with each other with interaction force.

[0051] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical terms "parallel" and "perpendicular" allow a certain degree of tolerance and / or error, including approximately parallel and approximately perpendicular.

[0052] Hereinafter, the present application will be described in detail.

[0053] At present, new energy batteries are more and more widely used in life and industry. New energy batteries are not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0054] New energy batteries can be applied to electric aircraft. The battery of the electric aircraft is usually composed of multiple battery modules, a battery management system, electrical connectors, a thermal management system, and a box body. The parts usually need fasteners to achieve mechanical connection, and also need fasteners to achieve electrical connection and sealing and protection. Electric aircrafts face extremely complex and harsh environmental conditions during operation, such as strong vibration, great impact, severe temperature change, and high humidity, etc. In the application scenario, environmental factors can cause the loosening of bolt connection, and there is a risk of connection failure. Therefore, improving the connection reliability and fastening capacity of the fastener is one of the research topics in the industry.

[0055] After research and design, a clamping portion is formed at the tail of the fastener, which can clamp the structure to be connected with the flange portion of the head of the fastener. The fastener is easy to install, can provide reliable connection strength and fastening force, has high connection reliability and strong stability.

[0056] Based on the design concept, the application designs a fastener for connecting a first structural member and a second structural member stacked together. In some embodiments, the fastener includes a flange portion and a nail body connected in a first direction. At least a portion of the nail body is arranged in a through hole of the first structural member and a through hole of the second structural member. The flange portion abuts a side surface of the first structural member. The nail body includes at least one clamping portion. In the first direction, at least a portion of the clamping portion abuts a side surface of the second structural member away from the first structural member. The flange portion and the clamping portion clamp the first structural member and the second structural member. The clamping portion is configured to rotate around a rotation axis perpendicular to the first direction.

[0057] In the technical scheme of the embodiments of the application, the fastener clamps the first structural member and the second structural member in two directions by the flange portion and the clamping portion, thereby effectively limiting the movement of the fastener in the first direction. The fastener is less likely to loosen or separate under the working conditions of aircraft vibration, impact, temperature and humidity changes, thereby improving the fastening ability and connection reliability of the fastener. The clamping portion can rotate, facilitating the disassembly and installation of the fastener.

[0058] In the embodiments of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0059] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the application are not limited in this regard.

[0060] The battery device mentioned in the embodiments of the application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel, or mixed connection through a busbar component.

[0061] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0062] In some embodiments, the battery device can be a battery pack including a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0063] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the case by fixing the battery module in the case.

[0064] As an example, the battery cell assembly can also be accommodated in the case by fixing a plurality of battery cells directly to the case.

[0065] As an example, the case can include a first case and a second case. The first case and the second case are fastened so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, enclosed means covered or closed, which can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0066] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a case, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0067] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells and battery devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0068] In the following, with reference to Figures 1 to 6 Some embodiments of the present application are described in detail.

[0069] Figure 1 The structure diagram of the fastener provided for some embodiments of the present application is shown; Figure 2 The structure diagram of the fastener provided for some embodiments of the present application before assembly is shown; Figure 3 The half-section view of the connection structure provided for some embodiments of the present application is shown; Figure 4 The bottom view of the connection structure provided for some embodiments of the present application is shown; Figure 5 The top view of the connection structure provided for some embodiments of the present application is shown; Figure 6 The structure diagram of the battery device provided for some embodiments of the present application is shown.

[0070] In some embodiments of the present application, for ease of description, a first direction, a radial direction of the straight rod portion (hereinafter referred to as “radial direction”), and a circumferential direction of the straight rod portion (hereinafter referred to as “circumferential direction”) are set. The first direction and the radial direction are directions intersecting each other, and here, the directions intersecting each other include directions perpendicular to each other. For ease of description, as shown by the arrows in FIGS. 1 to 6, the direction in which the arrow Z is located is the first direction, the direction in which the arrow R is located is the radial direction, and the direction in which the arrow W is located is the circumferential direction. Sometimes, the direction indicated by the arrow Z along the first direction is also referred to as “upward”, and the opposite direction is referred to as “downward”.

[0071] The first aspect of the embodiments of the present application provides a fastener 100 for connecting a first structural member 200 and a second structural member 300, which are stacked, as shown in FIGS. 1 and 2. Figure 1 、 Figure 3 The fastener 100 includes a flange portion 20 and a shank 10 connected along a first direction (Z), at least a part of the shank 10 is arranged in a through hole of the first structural member 200 and a through hole of the second structural member 300, the flange portion 20 abuts against a side surface of the first structural member 200; the shank 10 includes at least one clamping portion 13, at least a part of the clamping portion 13 abuts against a side surface of the second structural member 300 away from the first structural member 200 along the first direction (Z), and the flange portion 20 and the clamping portion 13 clamp the first structural member 200 and the second structural member 300. The clamping portion 13 is configured to rotate around a rotation axis perpendicular to the first direction (Z).

[0072] It can be understood that the fastener 100 refers to a connecting member for fixing the first structural member 200 and the second structural member 300.

[0073] Optionally, the material of the fastener 100 can be selected from high-strength alloys, such as titanium alloy and high-strength steel, to meet the requirements of anti-vibration and impact resistance.

[0074] It can be understood that the flange portion 20 is located at one end of the fastener 100, which corresponds to the head of the fastener 100.

[0075] Optionally, the flange portion 20 can be a part of the head of the fastener 100, or can be a washer-shaped structure combined with the head of the fastener 100 by clamping or threaded connection. The embodiments of the present application do not limit this.

[0076] Optionally, the size of the flange portion 20 along the radial direction (R) of the shank 10 is greater than the diameter of the shank 10 and the diameter of the through hole, and the flange portion 20 can abut against the surface of the first structural member 200 when the shank 10 is arranged in the through hole.

[0077] Optionally, the flange portion 20 can be designed as a circle, a square or a polygon, such as a hexagon, to facilitate tightening by a wrench.

[0078] Optionally, a lock washer (such as a toothed washer) or a sealing gasket can be additionally arranged between the flange portion 20 and the first structural member 200 to further improve the locking effect or the sealing performance.

[0079] It can be understood that the first structural member 200 and the second structural member 300 refer to two components that need to be connected in a stacked manner, such as two parts of an aircraft frame, a box and a cover plate of a battery device 1000, etc. The two components can be stacked along the thickness direction of one of them.

[0080] Exemplarily, the thickness direction of the first structural member 200 and the thickness direction of the second structural member 300 can be the same, both being the first direction (Z).

[0081] Optionally, the thickness of the first structural member 200 and the thickness of the second structural member 300 can be the same or different.

[0082] Exemplarily, the material of the first structural member 200 and the material of the second structural member 300 can be different, such as one being metal and the other being polymer material or composite material.

[0083] Exemplarily, the material of the first structural member 200 and the material of the second structural member 300 can be the same, for example, both being metal material (steel or aluminum alloy).

[0084] It can be understood that the through hole of the first structural member 200 and the through hole of the second structural member 300 are in communication, and the nail body 10 is arranged therein.

[0085] Optionally, the shape of the through hole can be circular or elliptical.

[0086] Exemplarily, the shape and size of the through hole are matched with the shape and size of the nail body 10, so that there is no excessive gap after the nail body 10 is arranged, and radial (R) shaking is avoided.

[0087] Optionally, the size of the through hole of the first structural member 200 and the size of the through hole of the second structural member 300 can be the same or different.

[0088] Exemplarily, when the size of the through hole of the first structural member 200 and the size of the through hole of the second structural member 300 are both circular holes, the axes of the two can be the same.

[0089] Exemplarily, as shown in Figure 3 , the first structural member 200 is provided with a first hole 201, and the second structural member 300 is provided with a second hole 301. The first hole 201 and the second hole 301 are both through holes, and the hole diameters of the two are the same and the axes are consistent.

[0090] It can be understood that the nail body 10 is the main part of the fastener 100, connecting the flange part 20 and the clamping part 13, and at least partially arranged in the through hole of the first structural member 200 and the second structural member 300.

[0091] It can be understood that the flange part 20 is arranged on the outside of the first structural member 200, and the clamping part 13 is arranged on the outside of the second structural member 300. The flange part 20 and the clamping part 13 clamp the first structural member 200 and the second structural member 300.

[0092] Optionally, the material of the clamping part 13 can be the same as the material of the flange part 20, or the same as the material of other parts of the nail body 10.

[0093] Optionally, the clamping portion 13 can be in a sheet or block structure.

[0094] Optionally, the shape of the clamping portion 13 can be circular, elliptical, triangular, rectangular or other polygonal, or irregular, when projected onto a projection plane perpendicular to the first direction (Z) along the first direction (Z).

[0095] Optionally, the clamping portion 13 can rotate along a radial direction (R) or other direction perpendicular to the first direction (Z).

[0096] Optionally, the clamping portion 13 can rotate relative to other parts of the nail body 10 (such as the straight rod portion 11) after installation. Figure 1 Figure 2 Optionally, the clamping portion 13 can rotate relative to other parts of the nail body 10 (such as the straight rod portion 11) after installation.

[0097] Optionally, the pivot can be the connection position of the clamping portion 13 and other parts of the nail body 10.

[0098] It can be understood that the clamping portion 13 rotates around the pivot to complete the installation when the fastener 100 is installed, and reversely rotates around the pivot to achieve disassembly when the fastener 100 is disassembled.

[0099] In the technical scheme of the embodiments of the present application, since the fastener 100 forms a two-way clamping on the first structure 200 and the second structure 300 through the flange portion 20 and the clamping portion 13, the fastener 100 can be effectively limited from moving along the first direction (Z), so that the fastener 100 is not prone to loosening or separation under the working conditions of aircraft vibration, impact, temperature and humidity changes, etc., and the fastening ability and connection reliability of the fastener 100 are improved. In addition, the clamping portion 13 can rotate, which facilitates the disassembly and installation of the fastener 100.

[0100] In the embodiments of the present application, the nail body 10 includes a straight rod portion 11 and a bent portion 12, the straight rod portion 11 is connected with the flange portion 20, the bent portion 12 is arranged obliquely relative to the straight rod portion 11, one end of the bent portion 12 is connected with the straight rod portion 11, and the other end is connected with the clamping portion 13. The bent portion 12 includes a pivot.

[0101] It can be understood that the straight rod portion 11, the bent portion 12 and the clamping portion 13 are an integral structure.

[0102] It can be understood that the straight rod portion 11 is the part of the nail body 10 directly connected with the flange portion 20, which is usually cylindrical and is the "main support section" of the fastener 100.

[0103] Optionally, the straight rod portion 11 can be provided with external threads matched with internal threads of the structure, or be a smooth surface.

[0104] Optionally, the straight rod portion 11 extends along the first direction (Z).​

[0105] Optionally, the length of the straight rod part 11 can match the total thickness of the first structural member 200 and the second structural member 300, so that the clamping part 13 can extend outside the second structural member 300, and the bending part 12 can be bent.

[0106] It can be understood that the bending part 12 is a transition section connecting the straight rod part 11 and the clamping part 13, and has a certain plastic deformation ability.

[0107] Optionally, the thickness of the bending part 12 can be smaller than that of the clamping part 13, so as to reduce the deformation resistance.

[0108] Optionally, the material of the bending part 12 can be a metal with good plasticity, such as aluminum alloy or copper alloy, so that the bending part 12 can be bent by a tool during assembly and is not easy to break.

[0109] Optionally, as viewed along the radial direction (R) of the straight rod part 11, the shape of the bending part 12 can be a circular arc, forming a transition connection between the straight rod part 11 and the clamping part 13.

[0110] It should be noted that the inclination refers to that after installation, the bending part 12 and the axis of the straight rod part 11 form a certain angle, which can be an acute angle, a right angle or an obtuse angle.

[0111] It can be understood that, as shown in Figure 2 , in order to facilitate installation, the clamping part 13 and the bending part 12 can extend along the first direction (Z) before installation, and a plurality of bending parts 12 are close to the axis of the straight rod part 11, so that the clamping part 13 can pass through the second hole 301 and protrude from the second structural member 300. After the flange part 20 contacts the surface of the first structural member 200, the bending part 12 is bent under the action of external force, and the clamping part 13 is driven to be close to the second structural member 300, thereby completing the installation of the fastener 100.

[0112] Exemplarily, as shown in Figure 2 , the bending part 12 and the clamping part 13 can be formed on the nail body 10 by cutting before installation.

[0113] It can be understood that the above installation steps can be performed in reverse to disassemble the fastener 100.

[0114] Exemplarily, the pivot can be the connection position of the bending part 12 and the straight rod part 11, or the connection position of the bending part 12 and the clamping part 13, or other positions of the bending part 12. The embodiments of the present application do not limit this.

[0115] In the technical scheme of the embodiment of the present application, the nail body 10 is provided with the inclined bending part 12, one end of which is connected to the straight rod part 11 and the other end of which is connected to the clamping part 13. Therefore, when the clamping part 13 is pressed during assembly, the bending part 12 can be adaptively deformed under external force, the clamping part 13 is guided to be bent as expected, and the clamping part 13 is driven to abut against the surface of the second structural member 300. The bending part 12, as a transition area connecting the clamping part 13 and the straight rod part 11, can reduce the risk of breakage when the clamping part 13 is deformed.

[0116] In the embodiment of the present application, along the thickness direction of the bending part 12, the side of the bending part 12 away from the second structural member 300 is convex to form a transition fillet.

[0117] Optionally, compared with other positions of the bending part 12, the transition fillet can have a greater thickness.

[0118] Optionally, the transition fillet is generated during bending or is cut before bending. For example, if the transition fillet is formed before bending, because the transition fillet makes the deformation path of the bending part 12 smoother, the deformation uniformity during assembly can be improved. During assembly, pressing the clamping part 13 using a tool will force the bending part 12 to deform towards the second structural member 300, reduce the risk of cracking, and reduce the assembly difficulty, improve the stability and efficiency of batch production.

[0119] It can be understood that the transition fillet can avoid sharp edges on the outside of the bending part 12 and the right-angle stress concentration points on the outside of the bending part 12. Under the working conditions of aircraft vibration, impact, etc., the clamping part 13 repeatedly bears the clamping force and the reaction force transmitted by the clamping part 13. The arc-shaped bending part 12 can disperse stress, reduce local stress peaks, improve the reliability and fatigue resistance of the bending part 12, and also avoid scratching other structural members.

[0120] In the technical scheme of the embodiment of the present application, because the bending part 12 forms an arc-shaped transition, the stress generated by the bending part 12 can be more smoothly transmitted and distributed during the bending of the clamping part 13, the risk of deformation and breakage is further reduced, and the fatigue life of the fastener 100 is improved. In addition, the initial position of the clamping part 13 is closer to the center line of the nail body 10 before deformation during assembly, which facilitates the clamping part 13 to pass through the through hole, improves the assembly convenience, and also reserves sufficient deformation space for the bending part 12.

[0121] In the embodiment of the present application, along the first direction (Z), each clamping part 13 is recessed inward on the side close to the second structural member 300 to form at least one recess 30, and the recess 30 extends to the edge of the clamping part 13 in a direction perpendicular to the first direction (Z).

[0122] Exemplarily, the recess 30 can be formed by machining, for example, can be a groove-shaped structure formed by milling, stamping or the like in the surface of the clamping portion 13. The depth, width and shape of the groove are not limited in the embodiment.

[0123] It can be understood that the recess 30 formed by machining can be formed before bending or after bending.

[0124] Exemplarily, the recess 30 can be formed by bending the edge portion of the clamping portion 13 away from the second structural member 300, thereby forming a gap, so that a larger gap can be formed, which is more convenient for tool operation disassembly.

[0125] It can be understood that when disassembling, a crowbar or the like tool can be inserted into the recess 30 to lift the clamping portion 13 so that the clamping portion 13 is no longer in contact with the second structural member 300. Then the clamping portion 13 and the bent portion 12 can be plastically deformed to return to the pre-assembly state, or the bent portion 12 and the clamping portion 13 can be damaged, the nail body 10 is pulled out of the through hole, and the disassembly is completed.

[0126] In the technical scheme of the embodiment of the application, the clamping portion 13 is provided with a recess 30 on the side close to the second structural member 300, and the recess 30 extends to the edge of the clamping portion 13 perpendicular to the first direction (Z), so that after assembly, the recess 30 forms a gap between the clamping portion 13 and the surface of the second structural member 300. When disassembling the fastener 100, a crowbar or the like disassembly tool can be directly inserted from the outside to deform or damage the clamping portion 13, thereby reducing the disassembly difficulty, facilitating the removal of the fastener 100, improving the disassembly ability of the fastener 100, and reducing the maintenance cost.

[0127] In the embodiment of the application, the recess 30 includes a first recess 31, and the extension direction of the first recess 31 is consistent with the radial direction (R) of the straight rod portion 11.

[0128] Exemplarily, the first recess 31 can be a groove.

[0129] It can be understood that the radial direction (R) of the straight rod portion 11 is the direction from the axis of the straight rod portion 11 to the outside, so it is convenient to insert a crowbar into the first recess 31 from the outside and disassemble. After the crowbar is inserted, the prying force is applied outward along the radial direction (R), which can directly lift the clamping portion 13 away from the straight rod portion 11, which is opposite to the bending direction of the clamping portion 13, and the force applied by the crowbar can be more concentrated on the root of the recess 30, thereby more easily starting the overall lifting of the clamping portion 13, reducing the required force for disassembly, saving labor and not easy to slip.

[0130] Optionally, each clamping portion 13 can be provided with at least one first recess 31.

[0131] In the technical scheme of the embodiment of the application, since the extension direction of the recessed portion 30 is consistent with the radial direction (R) of the straight rod portion 11, clear disassembly guidance can be provided for maintenance personnel, when the disassembly tool is inserted into the recessed portion 30, the force direction can directly act on the extension end of the clamping portion 13 along the radial direction (R) of the straight rod, avoiding the tool from slipping and damaging the surface of the structural member due to angle deviation, and the disassembly efficiency is also improved.

[0132] In the embodiment of the application, the recessed portion 30 comprises a second recessed portion 32, and the clamping portion 13 is bent to form the second recessed portion 32 away from the second structural member 300 along the first direction (Z).

[0133] It can be understood that the second recessed portion 32 is formed by bending the clamping portion 13 away from the second structural member 300 along the first direction (Z), that is, the gap between the clamping portion 13 and the second structural member 300 formed during assembly, and the bending angle of the second recessed portion 32 is not limited in the embodiment of the application.

[0134] Optionally, each clamping portion 13 can form at least one second recessed portion 32.

[0135] Exemplarily, as shown in Figure 3 , each clamping portion 13 can be provided with the first recessed portion 31 and the second recessed portion 32 at the same time.

[0136] In other embodiments not shown in the drawings, each clamping portion 13 can be provided with only the first recessed portion 31 or the second recessed portion 32.

[0137] In the technical scheme of the embodiment of the application, since the clamping portion 13 is bent to form the second recessed portion 32 away from the second structural member 300 along the first direction (Z), the second recessed portion 32 further enlarges the gap space between the clamping portion 13 and the second structural member 300, can adapt to more types of disassembly tools, and can provide more sufficient disassembly space for the disassembly tool. In addition, even if the first recessed portion 31 is slightly closed due to assembly deformation, the second recessed portion 32 can still retain the disassembly space, improving the flexibility and reliability of the disassembly scheme of the fastener 100.

[0138] In the embodiment of the application, the clamping portion 13 extends away from the straight rod portion 11 along the radial direction (R) of the straight rod portion 11, and the ratio of the size of the clamping portion 13 along the radial direction (R) of the straight rod portion 11 to the nominal diameter of the straight rod portion 11 is in the range of 0.8 to 2.

[0139] Exemplarily, as shown in Figure 1 , Figure 2 , Figure 3 , the straight rod portion 11 is provided with external threads, and the nominal diameter is the major diameter of the threads.

[0140] Optionally, the projection shape of the clamping portion 13 along the first direction (Z) is a rectangle, and the long side of the rectangle is parallel to the radial direction (R) of the clamping portion 13. The clamping portion 13 has a large contact area with the second structural member 300, which facilitates pressing and clamping the flange portion 20.

[0141] In the technical scheme of the embodiment of the present application, since the ratio of the size of the clamping portion 13 along the radial direction (R) of the straight rod portion 11 to the nominal diameter of the straight rod portion 11 is in a suitable range, the clamping force of the fastener 100 and the space occupation can be considered, and the cost and weight can be effectively controlled, which meets the lightweight demand of the aircraft.

[0142] In the embodiment of the present application, the plurality of clamping portions 13 are uniformly arranged along the circumferential direction (W) of the straight rod portion 11.

[0143] For example, when there are four clamping portions 13, the adjacent angle is 90°, and when there are six clamping portions 13, the adjacent angle is 60°.

[0144] It can be understood that the plurality of clamping portions 13 are uniformly arranged along the circumferential direction (W) of the straight rod portion 11 after assembly. The clamping force of the clamping portion 13 on the second structural member 300 is uniformly distributed along the circumferential direction (W), which avoids deformation of the second structural member 300 caused by excessive local clamping force.

[0145] For example, as shown in Figure 2 , the plurality of clamping portions 13 are uniformly arranged along the circumferential direction (W) of the straight rod portion 11 before assembly (when not bent).

[0146] In the technical scheme of the embodiment of the present application, since the plurality of clamping portions 13 are uniformly arranged along the circumferential direction (W) of the straight rod portion 11, the clamping force can be uniformly transmitted to each direction of the second structural member 300 by the clamping portion 13 cooperating with the flange portion 20, a symmetrical and stable support system is formed around the straight rod portion 11, vibration loosening caused by insufficient local clamping force is avoided, structural damage caused by excessive local clamping force is avoided, the bending of the nail body 10 caused by uneven stress is reduced, and the long-term reliability of the connecting structure 400 is improved.

[0147] In the embodiment of the present application, the number of clamping portions 13 is not more than 8.

[0148] Optionally, the number of clamping portions 13 can be any value in 1, 2, 3, 4, 5, 6, 7 or 8.

[0149] For example, as shown in Figure 1 , Figure 4 , four clamping portions 13 can be uniformly arranged along the circumferential direction (W) of the straight rod portion 11. The adjacent angle of the four clamping portions 13 is 90°.

[0150] In some embodiments not shown, the clamping portions 13 can also not be arranged uniformly, i.e., the intervals between adjacent clamping portions 13 can not necessarily be equal.

[0151] In the technical solution of the embodiments of the present application, since the number of clamping portions 13 is controlled to be less than or equal to 8, the processing process can be simplified, the production difficulty and cost can be reduced, and meanwhile, it is beneficial for the clamping portions 13 to deform synchronously and uniformly during assembly, thereby avoiding inconsistent deformation or insufficient strength caused by too many clamping portions 13.

[0152] The second aspect of the embodiments of the present application provides a connecting structure 400, which, in the embodiments of the present application, includes a first structural member 200 and a second structural member 300 arranged in a first direction (Z) in a superposed manner, and the fastener 100 of the first aspect of the embodiments of the present application; the first structural member 200 includes a first plate, and the second structural member 300 includes a second plate or a nut.

[0153] Exemplarily, as shown in Figure 3 , the connecting structure 400 includes the first structural member 200, the second structural member 300, and the fastener 100 connecting the first structural member 200 and the second structural member 300.

[0154] In the technical solution of the embodiments of the present application, thus, a connecting structure 400 with reliable connecting ability and fastening force can be provided, while the anti-loosening and anti-vibration ability of the connecting structure 400 is improved; and since the fastener 100 can be disassembled, the disassembly efficiency during maintenance of the connecting structure can also be improved. In addition, the second structural member 300 can be adapted to a second plate or a nut, thereby expanding the application scenarios of the connecting structure 400, meeting the connecting requirements of different scenarios, and enhancing the versatility of the connecting structure 400.

[0155] In the embodiments of the present application, the nail body 10 is provided with external threads, and the through hole of the first structural member 200 and / or the through hole of the second structural member 300 is provided with internal threads matched with the external threads.

[0156] Exemplarily, the through hole of the first structural member 200 has internal threads.

[0157] Exemplarily, the through hole of the second structural member 300 has internal threads.

[0158] Optionally, the external threads provided on the surface of the nail body 10 can be coarse threads or fine threads. The embodiments of the present application do not limit this.

[0159] Exemplarily, as shown in Figure 3 , the second structural member 300 is a second plate, and the second hole 301 is a threaded hole which can be matched with the external threads of the straight rod portion 11 of the nail body 10.

[0160] In the technical scheme of the embodiment of the present application, thus, the threaded connection as a means of reinforcing connection can effectively avoid axial movement under the clamping action, reduce the deformation stress of the clamping portion 13, and prolong the service life of the fastener 100; the double fixing structure of the threaded connection and the clamping portion 13 further improves the vibration resistance and impact resistance of the connection, and also improves the reliability of the connection.

[0161] The third aspect of the embodiment of the present application provides a battery device 1000, in the embodiment of the present application, comprising the fastener 100 of the first aspect of the embodiment of the present application or the connecting structure 400 of the second aspect of the embodiment of the present application.

[0162] Exemplarily, as shown in Figure 6 The battery device 1000 comprises a box body 1002 and a battery cell 1001 accommodated in the box body 1002, and the box body 1002 can comprise a cover body 1002A and a bottom plate 1002B, which can be connected by the fastener 100, so that a closed space is formed in the box body 1002 to accommodate the battery cell 1001.

[0163] Exemplarily, as shown in Figure 6 The edge of the cover body 1002A can be used as the first structural member 200, and the edge of the bottom plate 1002B (i.e. the second structural member 300) is connected by the fastener 100.

[0164] The fourth aspect of the embodiment of the present application provides a power consumption device, in the embodiment of the present application, comprising the battery device 1000 of the third aspect of the embodiment of the present application, and the battery device 1000 is used to provide electric energy.

[0165] In the embodiment of the present application, the power consumption device comprises an aircraft.

[0166] Thus, the requirements of the aircraft for weight and space can be adapted, and the complex and severe working environment of the aircraft can be adapted.

[0167] The specific scheme of the embodiment of the present application will be described below with reference to the drawings.

[0168] The bolt loosening hazard caused by the vibration, impact, temperature change, humidity and other working conditions in the working process of the aircraft in the related art, aiming at the high anti-loosening fastening bolt requirement of the aircraft, the embodiment provides a fastener 100 with an anti-loosening function and easy to disassemble, which reduces or even eliminates the risk of bolt loosening of the aircraft during work, and avoids the harm caused by bolt loosening. Moreover, the scheme also integrates an easy-to-disassemble structure, which facilitates the maintenance and repair of the subsequent anti-loosening bolt of the aircraft, improves the efficiency, and reduces the cost.

[0169] In specific embodiments, as Figure 1 , Figure 3 , Figure 4、 Figure 5 As shown, the fastener 100 connects the first structure 200 and the second structure 300, the fastener 100 includes the flange 20 and the nail body 10 connected along the first direction (Z), at least part of the nail body 10 is arranged in the first hole 201 and the second hole 301, the flange 20 abuts against the side surface of the first structure 200; the nail body 10 includes at least one clamping portion 13, at least part of the clamping portion 13 abuts against the side surface of the second structure 300 away from the first structure 200 along the first direction (Z), the flange 20 and the clamping portion 13 clamp the first structure 200 and the second structure 300. The nail body 10 includes the straight rod portion 11 and the bent portion 12, the straight rod portion 11 is connected with the flange 20, the bent portion 12 is arranged obliquely relative to the straight rod portion 11, one end of the bent portion 12 is connected with the straight rod portion 11, and the other end of the bent portion 12 is connected with the clamping portion 13.

[0170] In specific embodiments, the fastener 100 is made by cutting a bolt, and the tail end of the bolt is cut into a flower-shaped structure, each petal of which includes a bent portion 12 and a clamping portion 13.

[0171] In specific embodiments, the bent portion 12 can be deformed by using a pressing block when assembling the fastener 100, and the structure of the pressing block can have a protrusion, the tip of the protrusion is inserted into the tail of the fastener 100, and the deformation of the bent portion 12 can be driven during the process of approaching the straight rod portion 11, so that the clamping portion 13 contacts or abuts against the second structure 300.

[0172] Exemplarily, the protrusion can be a conical protrusion or a circular truncated cone-shaped protrusion, and in other embodiments, the protrusion can also have an arc surface, and the curvature can be adjusted according to design requirements.

[0173] In specific embodiments, the bottom of the pressing block can be connected with a holding handle for convenience.

[0174] In specific embodiments, after the deformation of the bent portion 12, the clamping portion 13 is pressed against the surface of the second structure 300, so that the interface is completely locked.

[0175] In specific embodiments, along the first direction (Z), each clamping portion 13 is recessed inwardly on the side close to the second structure 300 to form at least one recessed portion 30, and the recessed portion 30 extends to the edge of the clamping portion 13 along a direction perpendicular to the first direction (Z). The recessed portion 30 includes a first recessed portion 31, and the extension direction of the first recessed portion 31 is consistent with the radial direction (R) of the straight rod portion 11. The recessed portion 30 also includes a second recessed portion 32, and the second recessed portion 32 is formed by bending the clamping portion 13 away from the second structure along the first direction (Z).

[0176] In other embodiments, the extension direction of the first recessed portion 31 can also be inconsistent with the radial direction (R) of the straight rod portion 11.

[0177] Because the first recess 31 is formed by slotting the clamping part 13 in advance, there is a slot gap between the clamping part 13 and the assembly interface after the clamping part 13 is crimped on the assembly interface. By designing the size of the slot, the slot gap after assembly can be inserted into the crowbar, the clamping part 13 can be pried open, and the disassembly of the fastener 100 is realized. The slot can also be transverse, or a hole can be punched on the clamping part 13, which can facilitate disassembly.

[0178] In specific embodiments, the second structure 300 is designed with internal threads, and the straight rod part 11 is designed with an external thread length according to the actual interface requirements, which meets the interface engagement length requirements and does not exceed the interface of the second structure 300. When the fastener 100 is used, it is first consistent with the ordinary bolt, and the torque is hit, the internal and external threads are matched, the bolt is locked, and the interface is connected. The above-mentioned threads can use ordinary coarse threads, or special threads such as Sempol.

[0179] In specific embodiments, the first structure 200 and the second structure 300 can both be plate bodies, or the second structure 300 can be a nut.

[0180] If not particularly specified, all the embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0181] If not particularly specified, all the technical features and optional technical features of the present application can be combined to form new technical solutions.

[0182] If not particularly specified, all the steps of the present application can be performed in sequence or randomly, and the preferred method is to perform in sequence. For example, the method comprises steps (a) and (b), which means that the method can comprise steps (a) and (b) performed in sequence, or steps (b) and (a) performed in sequence. For example, it is mentioned that the method can further comprise step (c), which means that step (c) can be added to the method in any order, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0183] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered in the scope of protection requested by the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of protection.

Claims

1. A fastener for connecting overlapping first and second structural members, characterized in that, The fastener comprises a flange part and a nail body connected along a first direction, at least part of the nail body is arranged in a through hole of the first structural member and a through hole of the second structural member, the flange part abuts against a side surface of the first structural member; the nail body comprises at least one clamping part, at least part of the clamping part abuts against a side surface of the second structural member away from the first structural member along the first direction, the flange part and the clamping part clamp the first structural member and the second structural member; the clamping part is configured to rotate around a rotation shaft perpendicular to the first direction.

2. The fastener of claim 1, wherein, The nail body comprises a straight rod part and a bent part, the straight rod part is connected with the flange part, the bent part is arranged obliquely relative to the straight rod part, one end of the bent part is connected with the straight rod part, and the other end of the bent part is connected with the clamping part, and the bent part comprises the rotation shaft.

3. The fastener of claim 2, wherein, Along a thickness direction of the bent part, a side of the bent part away from the second structural member is convexly formed with a transition round corner.

4. The fastener of claim 2, wherein, Along the first direction, each clamping part is inwardly recessed to form at least one recessed part on a side close to the second structural member, and the recessed part extends to an edge of the clamping part along a direction perpendicular to the first direction.

5. The fastener of claim 4, wherein, The recessed part comprises a first recessed part, and an extension direction of the first recessed part is consistent with a radial direction of the straight rod part.

6. The fastener of claim 4 or 5, wherein, The recessed part comprises a second recessed part, and the clamping part is bent to form the second recessed part on a side away from the second structural member along the first direction.

7. The fastener of claim 2, wherein, The clamping part extends away from the straight rod part along a radial direction of the straight rod part, and a ratio of a size of the clamping part along the radial direction of the straight rod part to a nominal diameter of the straight rod part is in a range of 0.8 to 2.

8. The fastener of claim 2, wherein, A plurality of clamping parts are uniformly arranged along a circumferential direction of the straight rod part.

9. The fastener of any one of claims 1 to 5, 7, 8, wherein, The number of the clamping parts is not more than 8.

10. A connection structure characterized by comprising: The connecting structure comprises the first structural member and the second structural member arranged in a stacking manner along the first direction, and the fastener according to any one of claims 1 to 9; the first structural member comprises a first plate, and the second structural member comprises a second plate or a nut.

11. The connection structure according to claim 10, wherein The nail body is provided with external threads, and the through hole of the first structural member and / or the through hole of the second structural member is provided with internal threads matched with the external threads.

12. A battery device characterized by comprising: The connecting structure comprises the fastener according to any one of claims 1 to 9; or the connecting structure according to claim 10 or 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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