Fastening structure, locking device, battery device and electric device

Abstract

The utility model provides a fastening structure, a locking device, a battery device and a power utilization device, the fastening structure comprises a flange part and a rod part, and the rod part is arranged on one side of the flange part and is used for being in threaded connection with a matching structure; wherein any one of the flange part and the rod part is provided with a groove to form a deformation part, the deformation part is configured to be capable of protruding outwards under the action of external force to form a clamping part, and the clamping part is used for being connected with a workpiece to be locked in a clamped mode to achieve limiting of the fastening structure. The risk that the fastening structure rotates relative to the to-be-locked workpiece can be reduced without an additional positioning clamp, the assembling difficulty of the fastening structure can be reduced, and the assembling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of assembly technology, and in particular to a fastening structure, a locking device, a battery device and an electrical device. Background Art

[0002] Fastening structures such as bolts and nuts are components used to lock at least two components during the assembly process of components. Currently, the fastening structure is easy to rotate relative to the workpiece to be locked during the assembly process, and therefore it is usually necessary to use external force to assist in positioning the fastening structure, which increases the difficulty of assembly and reduces assembly efficiency. Utility Model Content

[0003] In view of the above problems, the present application provides a fastening structure, a locking device, a battery device and an electrical device, which can reduce the difficulty of assembly and improve the efficiency of assembly.

[0004] In the first aspect, an embodiment of the present application provides a fastening structure, including a flange portion and a rod portion, wherein the rod portion is arranged on one side of the flange portion for being threadedly connected to a mating structure; wherein either the flange portion or the rod portion is provided with a groove to form a deformation portion, and the deformation portion is configured to be able to protrude outward under the action of an external force and form a clamping portion, and the clamping portion is used to clamp with a workpiece to be locked.

[0005] In the above scheme, the rod portion is arranged on one side of the flange portion, and it can be threadedly connected with the matching structure to lock at least two workpieces to be locked. In addition, any one of the flange portion and the rod portion is provided with a groove to form a deformable portion. When at least two workpieces to be locked are connected through the fastening structure, the deformable portion can protrude outward under the action of an external force and form a clamping portion. The clamping portion can be clamped with the workpiece to be locked to achieve the position limitation of the fastening structure. The risk of the fastening structure rotating relative to the workpiece to be locked can be reduced without the aid of an additional positioning fixture, which can reduce the assembly difficulty of the fastening structure and improve the assembly efficiency.

[0006] In some embodiments, the flange portion is provided with a groove, and the deformation portion is arranged around the circumference of the flange portion; or the rod portion is provided with a groove, and the deformation portion is arranged around the circumference of the rod portion.

[0007] In the above scheme, the deformation part is arranged along the circumference of the flange part or along the circumference of the rod part. Under the action of external force, when the deformation part protrudes outward to form a clamping part, the clamping part can be arranged along the circumference of the flange part or along the circumference of the rod part, so as to clamp with the workpiece to be locked along the circumference of the flange part or the rod part, which can effectively improve the stability and reliability of the clamping.

[0008] In some embodiments, in the radial direction of the rod portion, the thickness of the deformation portion is smaller than the width of the flange portion or the rod portion.

[0009] In the above scheme, when the deformation part is formed on the flange part, the radial thickness of the deformation part along the rod part is smaller than the radial width of the flange part along the rod part; when the deformation part is formed on the rod part, the radial thickness of the deformation part along the rod part is smaller than the radial width of the rod part, which can reduce the difficulty of the deformation part protruding outward under the action of external force, and further reduce the assembly difficulty of the fastening structure.

[0010] In some embodiments, the flange portion includes a flange body and a deformation portion, the rod portion is arranged on one side of the flange body, the deformation portion includes a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion are arranged on opposite sides of the flange body along the axial direction of the rod portion, and are both arranged along the radial direction of the rod portion close to the edge of the flange body, the first sub-portion and the second sub-portion are configured to be able to protrude relative to the side wall of the flange body under the action of external force to form a clamping portion, and the clamping portion is used to clamp the workpiece to be locked along the axial direction.

[0011] In the above scheme, the deformation portion is formed on the flange portion, which includes a first sub-portion and a second sub-portion. During the assembly process of the fastening structure, the flange portion can be set in the assembly through hole of the workpiece to be locked. Since the first sub-portion and the second sub-portion are axially arranged on opposite sides of the flange body, and both are radially arranged close to the edge of the flange body, under the action of external force, the first sub-portion and the second sub-portion can be easily protruded outward relative to the side wall of the flange body, and a clamping portion is defined between the protruding first sub-portion and the second sub-portion. At this time, part of the workpiece to be locked is equivalent to being radially clamped in the clamping portion, thereby realizing the limitation of the fastening structure.

[0012] In some embodiments, the groove includes a first sub-groove and a second sub-groove, and the first sub-groove and the second sub-groove are axially arranged on opposite sides of the flange body, wherein the first sub-portion is located on a side of the flange body close to the rod portion in the axial direction, the first sub-groove is radially located between the first sub-portion and the rod portion, and the second sub-groove is radially located on a side of the second sub-portion close to the center of the flange body.

[0013] In the above scheme, the groove is formed in the flange part, which includes a first sub-groove and a second sub-groove arranged on opposite sides of the flange body in the axial direction, the first sub-groove is arranged correspondingly to the first sub-part, both of which are located on the side of the flange body close to the rod part in the axial direction, and the first sub-groove is radially located between the first sub-part and the rod part, the setting of the first sub-groove is equivalent to thinning the thickness of the first sub-part in the radial direction, which can reduce the difficulty of the first sub-part protruding outward relative to the side wall of the flange body under the action of external force. In addition, the second sub-groove is arranged correspondingly to the second sub-part, the second sub-groove is radially located on the side of the second sub-part close to the center of the flange body, the setting of the second sub-groove is equivalent to thinning the thickness of the second sub-part in the radial direction, which can reduce the difficulty of the second sub-part protruding outward relative to the side wall of the flange body under the action of external force.

[0014] In some embodiments, in the axial direction of the stem portion, along a direction away from the flange body, the thickness of the first sub-portion and / or the second sub-portion tends to decrease.

[0015] In the above scheme, by setting the thickness of the first sub-portion and / or the second sub-portion to decrease in the direction away from the flange main body, the first sub-portion and / or the second sub-portion can more easily protrude outward relative to the side wall of the flange main body under the action of external force, that is, the difficulty of the first sub-portion and / or the second sub-portion protruding outward relative to the side wall of the flange main body under the action of external force can be further reduced.

[0016] In some embodiments, the groove is disposed on the outer peripheral side of the rod portion and is arranged with the deformation portion along the radial direction of the rod portion, and the deformation portion is located on a side of the groove close to the center of the rod portion.

[0017] In the above scheme, a groove is provided on the outer peripheral side of the rod so that the deformation part is located on the side of the groove close to the center of the rod. During the assembly process of the fastening structure, the rod can be passed through an assembly through-hole of a workpiece to be locked, and then an external tool is used to apply force to the fastening structure axially, so that the deformation part is deformed and protrudes radially relative to the peripheral side surface of the rod. The protruding part relative to the peripheral side surface of the rod can form a clamping part, which can abut against the workpiece to be locked along the axial direction. At this time, the clamping part and the flange part are equivalent to axially locking the workpiece to be locked, and the corresponding workpiece to be locked can limit the fastening structure along the axial direction without the aid of an external clamp to further fix the fastening structure, which can reduce the assembly difficulty of the fastening structure and improve the assembly efficiency.

[0018] In some embodiments, the groove includes a first inner wall and a second inner wall arranged on opposite sides of the first inner wall along the axial direction of the rod portion. The first inner wall and the opening of the groove are arranged opposite to each other in the radial direction, and the first inner wall and the second inner wall are connected in an arc-shaped transition.

[0019] In the above scheme, by setting the first inner wall and the second inner wall of the groove to be connected in an arc-shaped transition, the various positions of the surface of the deformation part radially away from the center of the rod part can transition smoothly, which can reduce the risk of stress concentration in the deformation part during deformation.

[0020] In some embodiments, a blind hole is provided on the rod portion along its axial direction, the groove is located on the side of the deformation portion radially away from the blind hole, the flange portion is formed with a through hole connected to the blind hole, and at least part of the inner wall of the blind hole is provided with a first internal thread.

[0021] In the above scheme, a blind hole is axially arranged on the rod portion, so that at least part of the inner wall of the blind hole is provided with a first internal thread, and a through hole connected to the blind hole is formed on the flange portion, so that the matching structure can pass through the through hole of the flange portion and enter the blind hole of the rod portion, and be threadedly connected with the rod portion through the first internal thread, thereby achieving the fixation of at least two workpieces to be locked. In addition, the groove is located on the side of the deformation portion radially away from the blind hole. Compared with the groove formed on the inner wall of the blind hole, on the one hand, it can facilitate the processing of the groove and reduce the difficulty of processing the groove, and on the other hand, it can make the inner wall of the blind hole have sufficient space for setting the first internal thread, thereby improving the reliability of the threaded connection between the fastening structure and the matching structure.

[0022] In some embodiments, the inner wall of the through hole is provided with a second internal thread, and the second internal thread is connected to the first internal thread.

[0023] In the above scheme, by setting a second internal thread on the inner wall of the through hole, the first internal thread is connected to the second internal thread. In the process of the matching structure passing through the through hole to enter the blind hole, the matching structure can be further connected to the second internal thread on the inner wall of the through hole, thereby improving the connection reliability between the fastening structure and the matching structure, and enhancing the locking effect of the two on the workpiece to be locked.

[0024] In a second aspect, an embodiment of the present application provides a locking device, comprising any of the above fastening structures and a mating structure matingly connected to the fastening structure.

[0025] In a third aspect, an embodiment of the present application provides a battery device, comprising the above-mentioned locking device.

[0026] In a fourth aspect, an embodiment of the present application provides an electrical device, comprising the above-mentioned battery device.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of the present application;

[0030] Figure 2 is an exploded view of a battery device provided in some embodiments of the present application;

[0031] Figure 3 It is a schematic diagram of the structure of the fastening structure and the workpiece to be locked provided by some embodiments of the present application;

[0032] Figure 4 yes Figure 3 A schematic cross-sectional view of the AA portion when the fastening structure is not engaged with the workpiece to be fastened;

[0033] Figure 5 yes Figure 3 A schematic cross-sectional view of the AA portion after the middle fastening structure is engaged with the workpiece to be fastened;

[0034] Figure 6 It is a schematic diagram of the structure of the fastening structure and the workpiece to be locked provided in other embodiments of the present application;

[0035] Figure 7 yes Figure 6 A schematic cross-sectional view of the BB portion when the middle fastening structure is not engaged with the workpiece to be fastened;

[0036] Figure 8 yes Figure 6 A schematic cross-sectional view of the BB portion after the middle fastening structure is engaged with the workpiece to be fastened;

[0037] Fig. 9 yes Figure 4 A partial enlarged view of the fastening structure at CC;

[0038] Fig.10 yes Figure 7 A partial enlarged view of the fastening structure at DD.

[0039] Tag Name:

[0040] Vehicle 1000; battery device 100; controller 200; motor 300;

[0041] Battery cell 110; first box body 120; second box body 130;

[0042] Fastening structure 10; flange portion 11; flange body 111; through hole 113; rod portion 12; blind hole 121; groove 13; first sub-groove 131; second sub-groove 132; deformation portion 14; first sub-portion 141; second sub-portion 142; clamping portion 15;

[0043] Workpiece 20 to be locked; Assembly through hole 21. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0046] 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 indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0049] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0050] If there is no special explanation, all steps a of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps a(a) and (b), which means that the method may include steps a(a) and (b) performed sequentially, or may include steps a(b) and (a) performed sequentially. For example, mentioning that the method may also include step a(c) means that step a(c) may be added to the method in any order, for example, the method may include steps a(a), (b) and (c), or may include steps a(a), (c) and (b), or may include steps a(c), (a) and (b), etc.

[0051] 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, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] Fastening structures such as bolts and nuts are used to lock at least two components during the assembly process of components. They have a wide range of applications and can be used to assemble components in different fields. For example, the aforementioned fastening structures can be used to assemble battery devices in the battery field.

[0056] At present, before the fastening structure is connected with the matching structure to lock the workpiece to be locked, in order to reduce the rotation of the fastening structure relative to the workpiece to be locked and affect the assembly accuracy, it is usually necessary to use an additional positioning fixture to limit the fastening structure, fix the fastening structure to one of the workpieces to be locked, and after the fastening structure is connected with the matching structure, remove the aforementioned positioning fixture to complete the assembly of the workpiece to be locked. In this process, the assembly and disassembly of the positioning fixture will increase the assembly difficulty of the fastening structure and affect its assembly efficiency.

[0057] In view of this, an embodiment of the present application provides a fastening structure, including a flange portion and a rod portion, wherein the rod portion is arranged on one side of the flange portion for being threadedly connected to a mating structure; wherein either the flange portion or the rod portion is provided with a groove to form a deformation portion, and the deformation portion is configured to be able to protrude outward under the action of an external force and form a clamping portion, and the clamping portion is used to clamp with the workpiece to be locked, thereby realizing the limiting of the fastening structure, and the risk of the fastening structure rotating relative to the workpiece to be locked can be reduced without the aid of an additional positioning fixture, thereby reducing the assembly difficulty of the fastening structure and improving the assembly efficiency.

[0058] The technical solutions described in the embodiments of the present application can be applied to a variety of fields, especially to the battery field, for assembling various components in a battery device. The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0059] The battery device described in the embodiments of the present application is not limited to being applicable to the electrical devices described above, but for the sake of simplicity, the following embodiments are all described using electric vehicles as examples.

[0060] See also Figure 1 , Figure 1 A simple schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 may be provided inside the vehicle 1000, and specifically, for example, a battery device 100 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used, for example, to control the battery to power the motor 300. The battery device 100 may be used for starting and navigating the vehicle 1000, and of course, the battery device 100 may also be used to drive the vehicle 1000, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0061] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0062] Please refer to Figure 2 , Figure 2An exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a battery case and a battery cell 110. In some embodiments, the battery case may include a first case 120 and a second case 130, the first case 120 and the second case 130 cover each other, and the first case 120 and the second case 130 jointly define a receiving cavity for accommodating the battery cell 110. The second case 130 may be a hollow structure with one end open, the first case 120 may be a plate-like structure, the first case 120 covers the open side of the second case 130, so that the first case 120 and the second case 130 jointly define a receiving cavity; the first case 120 and the second case 130 may also be hollow structures with one side open, and the open side of the first case 120 covers the open side of the second case 130. Of course, the battery case formed by the first case 120 and the second case 130 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0063] The battery device 100 mentioned in the embodiment of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 110, and the plurality of battery cells 110 are connected in series, in parallel or in hybrid connection through a busbar.

[0064] In the embodiment of the present application, the battery cell 110 may be a secondary battery. A secondary battery refers to a battery cell 110 that can be continuously used by activating active materials by charging after the battery cell 110 is discharged.

[0065] The battery cell 110 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 metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0066] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 110 .

[0067] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells 110 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 110 by a cable tie.

[0068] In some embodiments, the battery device 100 may be a battery pack, which includes a battery case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the battery case.

[0069] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the battery case by fixing the battery module in the battery case.

[0070] As an example, the battery cell assembly may also be housed in the battery case by directly fixing the plurality of battery cells 110 to the battery case.

[0071] As an example, the battery case may include a first case 120 and a second case 130. The first case 120 and the second case 130 are buckled together to form a closed space inside the battery case to accommodate the battery cell assembly. The closed space here means to cover or close, which can be sealed or unsealed. The first case 120 can be a top cover or a bottom plate.

[0072] As an example, the battery case may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the battery case to accommodate the battery cell assembly.

[0073] In some embodiments, the battery box can be used as part of the chassis structure of the vehicle 1000. For example, part of the battery box can become at least a part of the floor of the vehicle 1000, or part of the battery box can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0074] In some embodiments, the battery device 100 may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0075] Next, the embodiment of the present application will describe the structure of the fastening structure in detail with reference to the accompanying drawings.

[0076] See also Figures 3 to 8 In the first aspect, an embodiment of the present application provides a fastening structure 10, including a flange portion 11 and a rod portion 12, wherein the rod portion 12 is arranged on one side of the flange portion 11 for being threadedly connected to a matching structure; wherein, either the flange portion 11 or the rod portion 12 is provided with a groove 13 to form a deformation portion 14, and the deformation portion 14 is configured to be able to protrude outward under the action of an external force and form a clamping portion 15, and the clamping portion 15 is used to clamp with a workpiece 20 to be locked.

[0077] The fastening structure 10 is used in conjunction with a matching structure to lock components of at least two workpieces 20 to be locked. During the locking process, one of the fastening structure 10 and the matching structure can pass through at least two workpieces 20 to be locked and be threadedly connected to the other to lock the at least two workpieces 20 to be locked.

[0078] It should be noted that the fastening structure 10 may be of various types, for example, the fastening structure 10 may be Figure 4 and Figure 5 The bolt structure or stud structure shown in the figure, in this case, the matching structure can be a nut structure, or the fastening structure 10 can be Figure 7 and Figure 8The nut structure shown is a nut structure, and the matching structure can be a bolt structure or a stud structure.

[0079] The fastening structure 10 includes a flange portion 11 and a rod portion 12, and the flange portion 11 and the rod portion 12 are arranged in sequence along the axial direction. Among them, the flange portion 11 is a component used to disperse the stress of the fastening structure 10 during the fastening process and improve the service life of the fastening structure 10. The rod portion 12 is a component in the fastening structure 10 used for threaded connection with the matching structure. The rod portion 12 may be provided with a thread. It can be understood that when the fastening structure 10 is a component such as a bolt structure or a screw structure, the thread on the rod portion 12 may be an external thread, and when the fastening structure 10 is a bolt structure, the thread on the rod portion 12 may be an internal thread.

[0080] The flange portion 11 has a larger radial dimension relative to the rod portion 12, and it can protrude radially relative to the edge of the rod portion 12. In a plane perpendicular to the axial direction, the projection of the rod portion 12 along the axial direction can be located within the projection of the flange portion 11 along the axial direction. Among them, in the plane perpendicular to the axial direction, the contour shape of the projection of the flange portion 11 along the axial direction can be various, for example, it can be circular or hexagonal. In the plane perpendicular to the axial direction, the contour shape of the projection of the rod portion 12 along the axial direction can be circular. It should be noted that the axial direction mentioned in the embodiment of the present application refers to the axial direction of the rod portion 12, and the radial direction refers to the radial direction of the rod portion 12.

[0081] Either the flange portion 11 or the rod portion 12 is provided with a groove 13, that is, the groove 13 can be formed in the flange portion 11, in which case the deformation portion 14 is formed in the flange portion 11, or the groove 13 can be formed in the rod portion 12, in which case the deformation portion 14 is formed in the rod portion 12. The groove 13 is a component used to reduce the local structural strength of the flange portion 11 or the rod portion 12 to form the deformation portion 14. When the flange portion 11 or the rod portion 12 is provided with the groove 13, the structural strength of the portion corresponding to the groove 13 is lower than the structural strength of the remaining portions, and the portion with lower structural strength can be the deformation portion 14, which can be deformed more easily under the action of external force.

[0082] The deformation part 14 is a component that is deformed and protrudes outward under the action of external force. Under the action of external force, the deformation part 14 can protrude outward to form a clamping part 15, and the clamping part 15 can be clamped with the workpiece 20 to be locked in the radial direction. At this time, the workpiece 20 to be locked can limit the fastening structure 10 in the axial direction, and there is no need to use additional fixing fixtures to clamp the fastening structure 10. It should be noted that "outward protrusion" in this application can refer to the side protrusion of the flange part 11 or the rod part 12, that is, the radial protrusion of the rod part 12. When the deformation part 14 protrudes outward under the action of external force to form the clamping part 15, the clamping part 15 can protrude radially relative to the side surface of the flange part 11 or the rod part 12.

[0083] When the groove 13 and the deformed portion 14 are formed on the flange portion 11, during the assembly process of the fastening structure 10, as shown in FIG. Figure 4 As shown, the flange portion 11 can be arranged in an assembly through hole 21 of a workpiece 20 to be locked, and then an external tool is used to apply force to the fastening structure 10, so that the deformation portion 14 is deformed and protrudes outward to form a clamping portion 15, as shown in FIG. Figure 5 As shown, at this time, the corresponding part of the workpiece 20 to be locked is located in the clamping portion 15, thereby realizing the mutual connection between the two.

[0084] When the groove 13 and the deformed portion 14 are formed on the rod portion 12, during the assembly process of the fastening structure 10, as shown in FIG. Figure 7 As shown, the rod portion 12 can pass through an assembly through hole 21 of a workpiece 20 to be locked, and then force is applied to the fastening structure 10 through an external tool, so that the deformation portion 14 is deformed and protrudes outward to form a clamping portion 15. At this time, the clamping portion 15 and the flange portion 11 are equivalent to axially locking the workpiece 20 to be locked.

[0085] In the above scheme, the rod portion 12 is arranged on one side of the flange portion 11, and can be threadedly connected with the matching structure to lock at least two workpieces 20 to be locked. In addition, any one of the flange portion 11 and the rod portion 12 is provided with a groove 13 to form a deformable portion 14. When at least two workpieces 20 to be locked are connected through the fastening structure 10, the deformable portion 14 can protrude outward under the action of an external force and form a clamping portion 15. The clamping portion 15 can be clamped with the workpiece 20 to be locked to achieve the position limitation of the fastening structure 10. The risk of the fastening structure 10 rotating relative to the workpiece 20 to be locked can be reduced without the aid of an additional positioning fixture, which can reduce the assembly difficulty of the fastening structure 10 and improve the assembly efficiency.

[0086] In some embodiments, the flange portion 11 is provided with a groove 13 , and the deformation portion 14 is arranged around the circumference of the flange portion 11 ; or the rod portion 12 is provided with a groove 13 , and the deformation portion 14 is arranged around the circumference of the rod portion 12 .

[0087] When the deformation part 14 is formed on the flange part 11, the deformation part 14 can be arranged around the circumference of the flange part 11, and the outer contour of the deformation part 14 can be approximately the same as the outer contour of the flange part 11. When the deformation part 14 is formed on the rod part 12, the deformation part 14 can be arranged around the circumference of the flange part 11, and the outer contour of the deformation part 14 can be approximately the same as the outer contour of the rod part 12. The deformation part 14 is arranged corresponding to the groove 13. If the deformation part 14 is arranged around the circumference of the flange part 11, the groove 13 is arranged around the circumference of the flange part 11; or, if the deformation part 14 is arranged around the circumference of the rod part 12, the groove 13 is arranged around the circumference of the rod part 12.

[0088] In the above scheme, the deformation portion 14 is arranged along the circumference of the flange portion 11 or along the circumference of the rod portion 12. When the deformation portion 14 protrudes outward under the action of external force to form the clamping portion 15, the clamping portion 15 can be arranged along the circumference of the flange portion 11 or along the circumference of the rod portion 12, so as to clamp with the workpiece 20 to be locked along the circumference of the flange portion 11 or the rod portion 12, which can effectively improve the stability and reliability of the clamping.

[0089] In some embodiments, in the radial direction of the rod portion 12 , the thickness of the deformation portion 14 is smaller than the width of the flange portion 11 or the rod portion 12 .

[0090] Specifically, when the deformation portion 14 is formed on the flange portion 11, the thickness of the deformation portion 14 in the radial direction may be less than the width of the flange portion 11 in the radial direction, and when the deformation portion 14 is formed on the rod portion 12, the thickness of the deformation portion 14 in the radial direction may be less than the width of the rod portion 12 in the radial direction. It can be understood that the width of the flange portion 11 or the rod portion 12 refers to the width of the remaining parts of the flange portion 11 or the rod portion 12 in the radial direction except the deformation portion 14, and the width may be the minimum width or the average width. Similarly, the thickness of the deformation portion 14 in the radial direction may be the minimum thickness of the deformation portion 14 or the average thickness of the deformation portion 14.

[0091] In the above scheme, when the deformation portion 14 is formed on the flange portion 11, the radial thickness of the deformation portion 14 along the rod portion 12 is smaller than the radial width of the flange portion 11 along the rod portion 12; when the deformation portion 14 is formed on the rod portion 12, the radial thickness of the deformation portion 14 along the rod portion 12 is smaller than the radial width of the rod portion 12, which can reduce the difficulty of the deformation portion 14 protruding outward under the action of external force, and further reduce the assembly difficulty of the fastening structure 10.

[0092] See also Figure 4 and Fig. 9 In some embodiments, the flange portion 11 includes a flange body 111 and a deformation portion 14, the rod portion 12 is arranged on one side of the flange body 111, and the deformation portion 14 includes a first sub-portion 141 and a second sub-portion 142. The first sub-portion 141 and the second sub-portion 142 are arranged on opposite sides of the flange body 111 along the axial direction of the rod portion 12, and are both arranged along the radial direction of the rod portion 12 close to the edge of the flange body 111. The first sub-portion 141 and the second sub-portion 142 are configured to be able to protrude relative to the side wall of the flange body 111 under the action of external force to form a clamping portion 15, and the clamping portion 15 is used to clamp the workpiece 20 to be locked along the axial direction.

[0093] The first sub-portion 141 and the second sub-portion 142 are arranged on opposite sides of the flange body 111 in the axial direction, wherein the first sub-portion 141 and the rod portion 12 may be located on the same side of the flange body 111, or the second sub-portion 142 and the rod portion 12 may be located on the same side of the flange body 111. The first sub-portion 141 and the second sub-portion 142 may both protrude in the axial direction relative to the surface of the flange body 111 in the axial direction. Under the action of external force, the first sub-portion 141 and the second sub-portion 142 may both deform toward the side wall of the flange body 111. The deformed first sub-portion 141 and the second sub-portion 142 may both protrude in the radial direction relative to the side wall of the flange body 111. At this time, a groove-shaped clamping portion 15 may be formed between the first sub-portion 141 and the second sub-portion 142. The groove-shaped clamping portion 15 may be defined by the first sub-portion 141 and the second sub-portion 142, or may be defined by the first sub-portion 141, the second sub-groove 132 and the side wall of the flange body 111.

[0094] The first sub-portion 141 and the second sub-portion 142 are both arranged radially close to the edge of the flange body 111, so when subjected to external force, the first sub-portion 141 and the second sub-portion 142 can be easily deformed toward the side wall of the flange body 111 and protrude relative to the side wall, which can reduce the difficulty of forming the clamping portion 15. It should be noted that the side of the first sub-portion 141 and the second sub-portion 142 radially close to the edge of the flange body 111 can be flush with the edge of the flange body 111, or can be spaced a certain distance from the edge of the flange body 111.

[0095] It can be understood that an assembly hole 21 can be opened on the workpiece 20 to be locked. During the assembly process of the fastening structure 10, the flange portion 11 can be first set in an assembly hole 21 of the workpiece 20 to be locked, and then force is applied to the fastening structure 10 to cause the first sub-portion 141 and the second sub-portion 142 to deform and form the aforementioned clamping portion 15. At this time, part of the workpiece 20 to be locked can be clamped in the groove-shaped clamping portion 15, and the first sub-portion 141 and the second sub-portion 142 are equivalent to clamping part of the workpiece 20 to be locked along the axial direction.

[0096] In some optional embodiments, the shape of the inner wall of the assembly hole 21 of the workpiece 20 to be locked can be adapted to the shape of the clamping portion 15 formed after the deformation of the deformation portion 14. When the workpiece 20 to be locked is clamped in the clamping portion 15, the inner wall of the assembly hole 21 can fit the inner wall of the clamping portion 15.

[0097] In some optional embodiments, the first sub-portion 141 and the second sub-portion 142 can be arranged along the circumference of the flange body 111. After being deformed by force, the first sub-portion 141 and the second sub-portion 142 can jointly define a clamping portion 15 arranged along the circumference of the flange body 111, so that the clamping portion 15 can be clamped to the workpiece 20 to be locked along the circumference of the flange body 111, thereby improving the reliability and stability of the clamping.

[0098] In some other embodiments, the number of the first sub-portion 141 and the second sub-portion 142 can be multiple, and the multiple first sub-portions 141 are distributed at circumferential intervals along the flange body 111, and the multiple second sub-portions 142 are distributed at circumferential intervals along the flange body 111. After being deformed by force, the multiple first sub-portions 141 and the multiple second sub-portions 142 can jointly define a plurality of clamping portions 15, and the plurality of clamping portions 15 are distributed at circumferential intervals along the flange body 111, so that the multiple clamping portions 15 are respectively clamped with the workpiece 20 to be locked at various positions on the circumference of the flange body 111 to improve the reliability and stability of the clamping.

[0099] In the above scheme, the deformation portion 14 is formed on the flange portion 11, which includes a first sub-portion 141 and a second sub-portion 142. During the assembly process of the fastening structure 10, the flange portion 11 can be set in the assembly through hole 21 of the workpiece 20 to be locked. Since the first sub-portion 141 and the second sub-portion 142 are axially arranged on opposite sides of the flange body 111, and both are radially arranged close to the edge of the flange body 111, under the action of external force, the first sub-portion 141 and the second sub-portion 142 can be easily protruded outward relative to the side wall of the flange body 111, and a clamping portion 15 is defined between the protruding first sub-portion 141 and the second sub-portion 142. At this time, part of the workpiece 20 to be locked is equivalent to being radially clamped in the clamping portion 15, thereby realizing the limitation of the fastening structure 10.

[0100] Please continue reading Figure 4 and Fig. 9 In some embodiments, the groove 13 includes a first sub-groove 131 and a second sub-groove 132, and the first sub-groove 131 and the second sub-groove 132 are axially arranged on opposite sides of the flange body 111, wherein the first sub-portion 141 is located on the side of the flange body 111 axially close to the rod portion 12, the first sub-groove 131 is radially located between the first sub-portion 141 and the rod portion 12, and the second sub-groove 132 is radially located on the side of the second sub-portion 142 close to the center of the flange body 111.

[0101] The first sub-groove 131 is formed in the flange portion 11 and is used to reduce the local structural strength of the flange portion 11 to form a component of the first sub-portion 141. The first sub-groove 131 can be formed by a concave setting on the surface of one side of the flange portion 11 close to the rod portion 12 in the axial direction, and its projection on the flange body 111 in the axial direction is located outside the projection of the rod portion 12 on the flange body 111 in the axial direction. At this time, the part of the flange portion 11 located on the side of the first sub-groove 131 radially away from the rod portion 12 can form the first sub-portion 141, so that the first sub-groove 131 is located between the first sub-portion 141 and the rod portion 12.

[0102] The projection shape of the first sub-groove 131 on the flange body 111 along the axial direction can be various. For example, the projection shape of the first sub-groove 131 on the flange body 111 along the axial direction can be annular. In this case, the first sub-groove 131 is equivalent to being arranged circumferentially along the flange body 111 or the rod portion 12. The first sub-portion 141 can be arranged circumferentially along the flange body 111, or multiple first sub-portions 141 can be formed on the side of the first sub-groove 131 radially away from the rod portion 12, so that the multiple first sub-portions 141 are distributed at intervals along the circumference of the flange body 111.

[0103] The outer contour of the projection of the first sub-groove 131 on the flange body 111 along the axial direction can be matched with the outer contour of the flange body 111, or can be different from the outer contour of the flange body 111. The cross-sectional shape of the first sub-groove 131 in the axial direction can be various, for example, the cross-sectional shape of the first sub-groove 131 in the axial direction can be an inverted trapezoid, and of course, it can also be other regular or irregular shapes. The shape of the side of the first sub-groove 131 radially away from the rod 12 is matched with the shape of the side surface of the first sub-portion 141 radially close to the rod 12. For example, when the cross-sectional shape of the first sub-groove 131 in the axial direction is an inverted trapezoid, and the first sub-groove 131 is inclinedly arranged at the side radially away from the rod 12, the side surface of the first sub-portion 141 radially close to the rod 12 is an inclined surface.

[0104] The second sub-groove 132 is formed in the flange portion 11 and is used to reduce the local structural strength of the flange portion 11 to form a component of the second sub-portion 142. The second sub-groove 132 can be formed by a depression on one side of the flange portion 11 away from the rod portion 12 in the axial direction. In this case, the portion of the flange portion 11 located in the second sub-groove 132 radially away from the center of the flange body 111 can form the second sub-portion 142.

[0105] The projection shape of the second sub-groove 132 on the flange body 111 along the axial direction can be various, for example, the projection shape of the second sub-groove 132 on the flange body 111 along the axial direction can be annular, or can be in other shapes such as a disc. The outer contour shape of the projection of the second sub-groove 132 on the flange body 111 along the axial direction can be matched with the outer contour shape of the flange body 111, or can be different from the outer contour shape of the flange body 111. In addition, the shape of the second sub-groove 132 on the side away from the center of the flange body 111 along the radial direction is matched with the shape of the side surface of the second sub-portion 142 on the side close to the center of the flange body 111 along the radial direction. For example, when the second sub-groove 132 is inclined on the side away from the center of the flange body 111 along the radial direction, the side surface of the second sub-portion 142 on the side close to the center of the flange body 111 along the radial direction is an inclined surface.

[0106] In the above scheme, the groove 13 is formed in the flange part 11, which includes a first sub-groove 131 and a second sub-groove 132 which are axially arranged on opposite sides of the flange body 111. The first sub-groove 131 is arranged correspondingly to the first sub-portion 141, and both are located on the side of the flange body 111 close to the rod part 12 along the axial direction, and the first sub-groove 131 is radially located between the first sub-portion 141 and the rod part 12. The arrangement of the first sub-groove 131 is equivalent to thinning the thickness of the first sub-portion 141 along the radial direction, which can reduce the difficulty of the first sub-portion 141 protruding outward relative to the side wall of the flange body 111 under the action of external force. In addition, the second sub-groove 132 is arranged correspondingly to the second sub-portion 142, and the second sub-groove 132 is radially located on the side of the second sub-portion 142 close to the center of the flange body 111. The arrangement of the second sub-groove 132 is equivalent to thinning the thickness of the second sub-portion 142 along the radial direction, which can reduce the difficulty of the second sub-portion 142 protruding outward relative to the side wall of the flange body 111 under the action of external force.

[0107] In some embodiments, in the axial direction of the rod portion 12 , along a direction away from the flange body 111 , the thickness of the first sub-portion 141 and / or the second sub-portion 142 tends to decrease.

[0108] The thickness of the first sub-portion 141 and / or the second sub-portion 142 decreases in the direction away from the flange body 111. The thickness of the first sub-portion 141 decreases in the direction away from the flange body 111, or the thickness of the second sub-portion 142 decreases in the direction away from the flange body 111, or the thickness of both the first sub-portion 141 and the second sub-portion 142 decreases in the direction away from the flange body 111. It should be noted that the thickness of the first sub-portion 141 and / or the second sub-portion 142 refers to the radial dimension of the first sub-portion 141 and / or the second sub-portion 142.

[0109] When the first sub-portion 141 is disposed on the side of the flange body 111 close to the rod 12 in the axial direction, the thickness of the first sub-portion 141 may decrease along the direction from the flange 11 to the rod 12, while the thickness of the second sub-portion 142 may decrease along the direction from the rod 12 to the flange 11. When the second sub-portion 142 is disposed on the side of the flange body 111 close to the rod 12 in the axial direction, the thickness of the second sub-portion 142 may decrease along the direction from the flange 11 to the rod 12, while the thickness of the first sub-portion 141 may decrease along the direction from the rod 12 to the flange 11.

[0110] In the above scheme, by setting the thickness of the first sub-portion 141 and / or the second sub-portion 142 to decrease in the direction away from the flange main body 111, the first sub-portion 141 and / or the second sub-portion 142 can be more easily protruded outward relative to the side wall of the flange main body 111 under the action of external force, that is, the difficulty of the first sub-portion 141 and / or the second sub-portion 142 protruding outward relative to the side wall of the flange main body 111 under the action of external force can be further reduced.

[0111] See also Fig.10 In some embodiments, the groove 13 is disposed on the outer peripheral side of the rod 12 and is arranged radially with the deformation portion 14 along the rod 12 . The deformation portion 14 is located on one side of the groove 13 close to the center of the rod 12 .

[0112] The groove 13 and the deformation part 14 are formed on the rod part 12, and the groove 13 can be formed by a depression on the circumferential surface of the rod part 12, wherein the structural strength of the portion of the rod part 12 corresponding to the groove 13 in the radial direction is lower than the structural strength of other portions of the rod part 12, and the portion with lower structural strength can form the deformation part 14, which is radially located on the side of the groove 13 close to the center of the rod part 12 and can be deformed more easily under the action of external force.

[0113] It can be understood that when the groove 13 and the deformation portion 14 are formed on the rod 12, the thread on the rod 12 can be an external thread, which is axially misaligned with the groove 13. In this case, the fastening structure 10 can be a bolt structure or a screw structure; or a threaded hole can be opened on the rod 12, and the groove 13 and the inner wall of the threaded hole are radially spaced. In this case, the thread on the rod 12 is an internal thread, and the fastening structure 10 can be a nut structure.

[0114] In some optional embodiments, the groove 13 can be arranged around the circumference of the rod portion 12. In this case, the deformation portion 14 is arranged around the circumference of the rod portion 12. When the deformation portion 14 protrudes outward under the action of external force to form a clamping portion 15, the clamping portion 15 is arranged around the circumference of the rod portion 12. It can be clamped with the workpiece 20 to be locked in the circumference of the rod portion 12, thereby improving the stability and reliability of the clamping.

[0115] In other optional embodiments, the number of grooves 13 can be multiple, and the multiple grooves 13 are distributed at intervals along the circumference of the rod portion 12. In this case, a plurality of deformation portions 14 corresponding to the multiple grooves 13 can be formed on the rod portion 12. Under the action of external force, the multiple deformation portions 14 protrude outward to form a plurality of clamping portions 15. The multiple clamping portions 15 can be clamped with the workpiece 20 to be locked at multiple positions on the circumference of the rod portion 12 to improve the stability and reliability of the clamping.

[0116] It should be noted that the cross-sectional shape of the groove 13 in the axial direction can be various, for example, the cross-sectional shape of the groove 13 in the axial direction can be approximately semicircular, or can be square, semi-elliptical or other regular or irregular shapes.

[0117] In the above scheme, a groove 13 is provided on the outer peripheral side of the rod 12, so that the deformation portion 14 is located on the side of the groove 13 close to the center of the rod 12. During the assembly process of the fastening structure 10, the rod 12 can be passed through an assembly through hole 21 of a workpiece 20 to be locked, and then an external tool is used to apply force to the fastening structure 10 axially, so that the deformation portion 14 is deformed and protrudes radially relative to the circumferential side surface of the rod 12. The protruding portion relative to the circumferential side surface of the rod 12 can form a clamping portion 15, which can abut against the workpiece 20 to be locked along the axial direction. At this time, the clamping portion 15 and the flange portion 11 are equivalent to axially locking the workpiece 20 to be locked, and the corresponding workpiece 20 to be locked can limit the fastening structure 10 along the axial direction without the need to use an external clamp to further fix the fastening structure 10, which can reduce the assembly difficulty of the fastening structure 10 and improve the assembly efficiency.

[0118] In addition, the groove 13 is arranged on the outer peripheral side of the rod portion 12 , which can also facilitate the processing of the groove 13 , reduce the production difficulty of the fastening structure 10 , and improve the production efficiency of the fastening structure 10 .

[0119] It should be noted that when the groove 13 and the deformable portion 14 are formed on the rod portion 12, there are many ways for the clamping portion 15 of the present application to clamp the workpiece 20 to be locked. For example, the inner wall of the assembly hole 21 of the workpiece 20 to be locked can be as follows: Figure 7 and Figure 8 As shown, a clamping groove is provided, and after the deformation portion 14 forms the clamping portion 15 under the action of external force, the clamping portion 15 is clamped in the clamping groove, that is, the clamping portion 15 can be clamped with the workpiece 20 to be locked inside the assembly through hole 21 of the workpiece 20 to be locked, which can improve the reliability of the clamping of the clamping portion 15 and the workpiece 20 to be locked. Alternatively, the clamping portion 15 can also directly abut against the side surface of the workpiece 20 to be locked that is radially away from the flange portion 11, and at this time, the clamping portion 15 and the flange portion 11 can lock the workpiece 20 to be locked along the axial direction.

[0120] In some embodiments, the groove 13 includes a first inner wall and a second inner wall arranged on opposite sides of the first inner wall along the axial direction of the rod portion 12. The first inner wall and the opening of the groove 13 are arranged radially opposite to each other, and the first inner wall and the second inner wall are connected in an arc-shaped transition.

[0121] Specifically, the first inner wall may be the bottom wall of the groove 13, and the second inner wall may be the side wall of the groove 13, wherein there may be two second inner walls, which are arranged on opposite sides of the first inner wall along the axial direction.

[0122] It should be noted that when the groove 13 is arranged around the circumference of the rod 12, the first inner wall and the second inner wall are both arranged around the circumference of the rod 12. When the rod 12 is provided with multiple grooves 13 along the circumference, each groove 13 further includes two third inner walls arranged opposite to each other, the two third inner walls are located between the two second inner walls, and are respectively connected to the first inner wall and the two second inner walls. At this time, the first inner wall, the two second inner walls and the two third inner walls are enclosed together to form the corresponding groove 13.

[0123] It can be understood that the deformation portion 14 is located on the side of the groove 13 radially close to the center of the rod portion 12, and the first inner wall and the second inner wall of the groove 13 can jointly constitute the surface of the deformation portion 14 radially away from the center of the rod portion 12. When the first inner wall and the second inner wall are connected in an arc-shaped transition, it is equivalent to improving the smoothness of the surface of the deformation portion 14 radially away from the center of the rod portion 12.

[0124] In the above scheme, by setting the first inner wall and the second inner wall of the groove 13 to be connected in an arc-shaped transition, the various positions of the surface of the deformation part 14 radially away from the center of the rod part 12 can be smoothly transitioned, which can reduce the risk of stress concentration in the deformation part 14 during deformation.

[0125] It should be noted that when the first inner wall and the second inner wall of the groove 13 are connected in an arc-shaped transition, the cross-sectional shape of the groove 13 in the axial direction can be approximately semicircular, which can make the stress distribution of the deformation portion 14 more uniform.

[0126] Please continue reading Fig.10 In some embodiments, a blind hole 121 is provided on the rod portion 12 along the axial direction of the rod portion 12, the groove 13 is located on the side of the deformation portion 14 radially away from the blind hole 121, the flange portion 11 is formed with a through hole 113 connected to the blind hole 121, and at least a portion of the inner wall of the blind hole 121 is provided with a first internal thread.

[0127] The blind hole 121 may include a bottom wall and an inner wall disposed around one side of the bottom wall along the circumference of the bottom wall. At least a portion of the inner wall may form a first internal thread, and the first internal thread may be threadedly connected to a matching structure provided with an external thread.

[0128] The flange portion 11 is provided with a through hole 113 along the axial direction, and the through hole 113 is connected to the blind hole 121, wherein, in a plane perpendicular to the axial direction, the axial projection of the through hole 113 can overlap with the axial projection of the blind hole 121, so that the matching structure can pass through the through hole 113 and enter the blind hole 121, and be connected to the first internal thread on the inner wall of the blind hole 121.

[0129] The deformation portion 14 is located between the groove 13 and the blind hole 121 , wherein a side surface of the deformation portion 14 radially away from the center of the rod portion 12 is the inner surface of the groove 13 , and a side surface of the deformation portion 14 radially close to the center of the rod portion 12 can be a partial inner wall of the blind hole 121 .

[0130] In the above scheme, a blind hole 121 is axially arranged on the rod 12, so that at least part of the inner wall of the blind hole 121 is provided with a first internal thread, and a through hole 113 communicating with the blind hole 121 is formed on the flange 11, so that the matching structure can pass through the through hole 113 of the flange 11 and enter the blind hole 121 of the rod 12, and be threadedly connected with the rod 12 through the first internal thread, thereby achieving the fixation of at least two workpieces 20 to be locked. In addition, the groove 13 is located on the side of the deformation portion 14 radially away from the blind hole 121. Compared with the groove 13 formed on the inner wall of the blind hole 121, on the one hand, it can facilitate the processing of the groove 13 and reduce the processing difficulty of the groove 13, and on the other hand, it can make the inner wall of the blind hole 121 have sufficient space for setting the first internal thread, thereby improving the reliability of the threaded connection between the fastening structure 10 and the matching structure.

[0131] It should be noted that in these embodiments, the rod 12 of the fastening structure 10 can pass through the assembly through hole 21 of a workpiece 20 to be locked. Under the action of external force, the deformation portion 14 on the rod 12 protrudes outward to form a clamping portion 15, and the clamping portion 15 is clamped with the workpiece 20 to be locked to achieve the fixation of the two. On this basis, the remaining workpieces 20 to be locked are arranged on the side of the flange 11 axially away from the rod 12, so that the matching structure passes through the assembly through hole 21 of the remaining workpiece 20 to be locked and the through hole 113 of the flange 11 in sequence, enters the blind hole 121 of the rod 12, and is connected with the first internal thread on the inner wall of the blind hole 121, so that at least two workpieces 20 to be locked can be locked axially.

[0132] In some embodiments, the inner wall of the through hole 113 is provided with a second internal thread, and the second internal thread is connected to the first internal thread.

[0133] The first internal thread is connected to the second internal thread, and the rotation direction of the two is the same, and the parameters such as diameter, pitch, and tooth angle are all consistent. Therefore, the matching structure can be connected to the first internal thread and the second internal thread at the same time.

[0134] In the above scheme, a second internal thread is arranged on the inner wall of the through hole 113 so that the first internal thread is connected to the second internal thread. In the process of the matching structure passing through the through hole 113 to enter the blind hole 121, the matching structure can be further connected to the second internal thread on the inner wall of the through hole 113, thereby improving the connection reliability between the fastening structure 10 and the matching structure and enhancing the locking effect of the two on the workpiece 20 to be locked.

[0135] In a second aspect, an embodiment of the present application provides a locking device, comprising any one of the above fastening structures 10 and a matching structure connected to the fastening structure 10 .

[0136] The locking device provided in the embodiment of the present application has the technical effect of the technical solution of the fastening structure 10 in any of the above embodiments, and the explanation of the structures and terms that are the same or corresponding to the above embodiments will not be repeated here.

[0137] In a third aspect, an embodiment of the present application provides a battery device, comprising the above-mentioned locking device.

[0138] In a fourth aspect, an embodiment of the present application provides an electrical device, comprising the above-mentioned battery device.

[0139] According to some embodiments of the present application, the fastening structure 10 includes a flange portion 11 and a rod portion 12, wherein the rod portion 12 is disposed on one side of the flange portion 11 and is used to be threadedly connected with a matching structure; wherein, either the flange portion 11 or the rod portion 12 is provided with a groove 13 to form a deformation portion 14, and the deformation portion 14 is configured to be able to protrude outward under the action of an external force and form a clamping portion 15, and the clamping portion 15 is used to clamp with a workpiece 20 to be locked. The flange portion 11 is provided with a groove 13, and the deformation portion 14 is arranged around the circumference of the flange portion 11; or the rod portion 12 is provided with a groove 13, and the deformation portion 14 is arranged around the circumference of the rod portion 12. The flange portion 11 includes a flange main body 111 and a deformation portion 14. The rod portion 12 is arranged on one side of the flange main body 111. The deformation portion 14 includes a first sub-portion 141 and a second sub-portion 142. The first sub-portion 141 and the second sub-portion 142 are arranged on opposite sides of the flange main body 111 along the axial direction of the rod portion 12, and are both arranged along the radial direction of the rod portion 12 close to the edge of the flange main body 111. The first sub-portion 141 and the second sub-portion 142 are configured to be able to protrude relative to the side wall of the flange main body 111 under the action of external force to form a clamping portion 15, and the clamping portion 15 is used to clamp the workpiece 20 to be locked along the axial direction. The groove 13 includes a first sub-groove 131 and a second sub-groove 132, which are axially arranged on opposite sides of the flange body 111, wherein the first sub-portion 141 is located on the side of the flange body 111 close to the rod portion 12 in the axial direction, the first sub-groove 131 is radially located between the first sub-portion 141 and the rod portion 12, and the second sub-groove 132 is radially located on the side of the second sub-portion 142 close to the center of the flange body 111. Alternatively, the groove 13 is arranged on the outer peripheral side of the rod portion 12, and is arranged with the deformation portion 14 in the radial direction of the rod portion 12, and the deformation portion 14 is located on the side of the groove 13 close to the center of the rod portion 12. The groove 13 includes a first inner wall and a second inner wall arranged on opposite sides of the first inner wall in the axial direction of the rod portion 12, the first inner wall and the opening of the groove 13 are arranged opposite to each other in the radial direction, and the first inner wall and the second inner wall are connected in an arc-shaped transition.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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 included in the scope of the claims and specification of the present 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. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A fastening structure, characterized in that: include: Flange; A rod portion, disposed on one side of the flange portion, and used for threaded connection with a matching structure; Wherein, any one of the flange portion and the rod portion is provided with a groove to form a deformation portion, and the deformation portion is configured to be able to protrude outward under the action of an external force and form a clamping portion, and the clamping portion is used to clamp with the workpiece to be locked.

2. The fastening structure according to claim 1, characterized in that: The flange portion is provided with the groove, and the deformation portion is arranged around the circumference of the flange portion; or the rod portion is provided with the groove, and the deformation portion is arranged around the circumference of the rod portion.

3. The fastening structure according to claim 1, characterized in that: In the radial direction of the rod portion, the thickness of the deformation portion is smaller than the width of the flange portion or the rod portion.

4. The fastening structure according to any one of claims 1 to 3, characterized in that: The flange portion includes a flange body and a deformation portion, the rod portion is arranged on one side of the flange body, the deformation portion includes a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion are arranged on opposite sides of the flange body along the axial direction of the rod portion, and are both arranged along the radial direction of the rod portion close to the edge of the flange body, The first sub-portion and the second sub-portion are configured to protrude relative to the side wall of the flange body under the action of an external force to form the clamping portion, and the clamping portion is used to clamp the workpiece to be locked along the axial direction.

5. The fastening structure according to claim 4, characterized in that: The groove includes a first sub-groove and a second sub-groove, wherein the first sub-groove and the second sub-groove are arranged on opposite sides of the flange body along the axial direction, The first sub-portion is located on a side of the flange body close to the rod portion along the axial direction, the first sub-groove is located between the first sub-portion and the rod portion along the radial direction, and the second sub-groove is located on a side of the second sub-portion close to the center of the flange body along the radial direction.

6. The fastening structure according to claim 4, characterized in that: In the axial direction of the rod portion, along a direction away from the flange body, the thickness of the first sub-portion and / or the second sub-portion tends to decrease.

7. The fastening structure according to any one of claims 1 to 3, characterized in that: The groove is disposed on the outer peripheral side of the rod portion and is arranged along the radial direction of the rod portion together with the deformation portion. The deformation portion is located on a side of the groove close to the center of the rod portion.

8. The fastening structure according to claim 7, characterized in that: The groove includes a first inner wall and a second inner wall arranged on opposite sides of the first inner wall along the axial direction of the rod portion. The first inner wall and the opening of the groove are arranged opposite to each other along the radial direction. The first inner wall and the second inner wall are connected in an arc-shaped transition.

9. The fastening structure according to claim 7, characterized in that: The rod portion is provided with a blind hole along the axial direction of the rod portion, and the groove is located on a side of the deformation portion away from the blind hole along the radial direction. The flange portion is formed with a through hole communicating with the blind hole, and at least a portion of the inner wall of the blind hole is provided with a first internal thread.

10. The fastening structure according to claim 9, characterized in that: The inner wall of the through hole is provided with a second internal thread, and the second internal thread is connected to the first internal thread.

11. A locking device, characterized in that: It comprises the fastening structure as described in any one of claims 1 to 10 and a matching structure connected to the fastening structure.

12. A battery device, characterized in that: Comprising the locking device according to claim 11.

13. An electrical device, characterized in that: A battery device comprising the battery device of claim 12.

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