Bolt flange embedded type hinge structure

Abstract

The utility model provides a bolt flange embedded type hinge structure which comprises a hinge seat and a bolt body, and a first through hole and a second through hole which are coaxial are formed in the hinge seat. A step part is arranged on the flange surface of the head of the bolt body; wherein the bolt body is respectively matched with the first through hole and the second through hole through the outlines of the head part and the step part, and the head part of the bolt body is positioned in the first through hole. According to the utility model, the regular hexagonal conical hole, the corresponding regular hexagonal conical bolt head and the regular hexagonal conical flange surface are arranged to be matched with the regular hexagonal hole and the cylindrical hole of the hinge seat, so that the flange surface and the step surface of the bolt body are respectively and tightly matched with the conical hole and the cylindrical hole of the hinge seat, the bolt head is completely hidden, and the torque strength is enhanced; the problems that a hinge bolt head is exposed and the mechanical property of a hinge is reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a bolt flange embedded hinge structure. Background Technology

[0002] In many car models on the market, when the tailgate is open, the head of the welded bolts on the tailgate hinge and the body fixing plate often extends beyond the highest point of the tailgate seal, resulting in the unsightly exposed head of the welded bolts on the tailgate hinge fixing plate.

[0003] Current solutions involve increasing the distance between the hinge axis and the hinge mounting surface to adjust the relative position of the bolt heads, causing the welded bolt heads on the mounting surface to sink below the highest point of the door seal, thus achieving a concealed appearance. However, while this solution effectively improves the appearance, it also increases the height of the hinge mounting surface, reducing the hinge's mechanical properties. This can easily lead to problems such as insufficient bending stiffness and reduced load-bearing capacity, and may even result in the hinge's key performance indicators failing to meet structural design requirements.

[0004] In view of this, a new hinge structure adaptation scheme is proposed, which, without changing the hinge performance requirements, ensures that the hinge projection weld bolt head is not exposed after the back door is opened, thus improving the aesthetic appearance.

[0005] It should be noted that the information disclosed in the above background section is only used to enhance the understanding of the background of this utility model and does not constitute any limitation on this utility model. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, this utility model provides a bolt flange embedded hinge structure, which solves the problem of exposed hinge bolt heads by setting matching bolt head and hinge seat through hole, so that the bolt head is completely hidden and not exposed.

[0007] This utility model provides a bolt flange embedded hinge structure, including a hinge seat and a bolt body. The hinge seat has a coaxial first through hole and a second through hole. The flange surface of the head of the bolt body is provided with a stepped portion. The bolt body matches the first through hole and the second through hole respectively through the contours of the head and the stepped portion, and its head is located in the first through hole.

[0008] In one embodiment of the present invention, the inner diameter of the first through hole is larger than the inner diameter of the second through hole, and the first through hole and the second through hole form a stepped hole on the hinge seat.

[0009] In one embodiment of this utility model, the axial lengths of the first through hole and the second through hole are equal.

[0010] In one embodiment of this utility model, the inner diameter of the second through hole is larger than the outer diameter of the bolt body.

[0011] In one embodiment of the present invention, the outer diameter of the head of the bolt body is smaller than the inner diameter of the first through hole, and the height of the head of the bolt body is not greater than the axial length of the first through hole.

[0012] In one embodiment of this utility model, the stepped portion and the second through hole are interference-fitted.

[0013] In one embodiment of this utility model, the first through hole and the second through hole are cylindrical holes, and the head and the stepped part of the bolt body are cylinders corresponding to the cylindrical holes.

[0014] In one embodiment of this utility model, the first through hole is a tapered hole, and the head of the bolt body and its flange face are a tapered body and a tapered flange face corresponding to the tapered hole.

[0015] In one embodiment of this utility model, the first through hole is a regular hexagonal hole, and the head of the bolt body and its flange face are a regular hexagonal body and a regular hexagonal flange face corresponding to the regular hexagonal hole.

[0016] In one embodiment of this utility model, the first through hole is a regular hexagonal pyramidal hole, and the head of the bolt body and its flange face are a regular hexagonal pyramidal body and a regular hexagonal pyramidal flange face corresponding to the regular hexagonal pyramidal hole.

[0017] The beneficial effects of this utility model are as follows: By setting matching bolt heads and hinge seat through holes, the flange face and stepped face of the bolt head respectively mate with the two through holes of the hinge seat, ensuring connection strength and sealing. Furthermore, the bolt head is completely hidden, enhancing torque strength and achieving a combination of aesthetics and functionality.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0020] Figure 1 This is a cross-sectional view of the hinge seat opening in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the bolt body structure in one embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of the assembly of the bolt body and the hinge seat in one embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of the hinge seat opening in another embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the bolt body structure in another embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional view of the assembly of the bolt body and the hinge seat in another embodiment of the present invention;

[0026] Figure 7 This is a cross-sectional view of the hinge seat opening in another embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the bolt body structure in another embodiment of the present invention;

[0028] Figure 9 This is a top view and a sectional view of the assembly of the bolt body and the hinge seat in another embodiment of the present invention;

[0029] Figure 10 This is a cross-sectional view of the hinge seat opening in another embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of the bolt body structure in another embodiment of the present invention;

[0031] Figure 12 This is a cross-sectional view and a top view of the assembly of the bolt body and the hinge seat in another embodiment of the present invention.

[0032] In the figure: 1. Hinge seat; 11. First through hole; 12. Second through hole; 2. Bolt body; 20. Head; 200. Flange face; 21. Stepped part. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model.

[0034] Please see Figures 1 to 12 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification regarding position, quantity, etc., are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to these relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention's implementation.

[0035] Please see Figures 1 to 12 This utility model provides a bolt flange embedded hinge structure, including a hinge seat 1 and a bolt body 2. The hinge seat 1 has a coaxial first through hole 11 and a second through hole 12. The flange surface 200 of the head 20 of the bolt body 2 is provided with a stepped portion 21. The bolt body 2 matches the first through hole 11 and the second through hole 12 respectively by the contours of the head 20 and the stepped portion 21, and the head 20 is located in the first through hole 11.

[0036] Specifically, in this embodiment of the invention, two types of first through holes 11 and second through holes 12 are provided on the hinge seat 1 in the hinge structure to adapt to the shape of the head 20 of the bolt body 2, thereby allowing the head 20 and its stepped portion 21 of the bolt body 2 to be embedded in the hinge seat 1. In other words, by providing coaxial first through holes 11 and second through holes 12 on the hinge seat 1, and matching these two through holes with the head 20 and stepped portion 21 of the bolt body 2 respectively, precise assembly is achieved. The first through hole 11 is used to accommodate the head 20 of the bolt body 2, while the second through hole 12 matches the stepped portion 21 of the bolt body 2. This ensures that the bolt body 2 is stably positioned in the hinge seat 1, while preventing the bolt head from being exposed, thereby improving the overall neatness of the appearance.

[0037] More specifically, by providing a stepped portion 21 on the flange face 200 of the head 20 of the bolt body 2, the bolt body 2 can be matched with the second through hole 12 of the hinge seat 1, achieving embedded installation. The head 20 of the bolt body 2 is located inside the first through hole 11, while the stepped portion 21 matches the second through hole 12, ensuring the stability of the bolt body 2 and avoiding the problem of exposed bolt heads due to projection welding.

[0038] Thus, the embedded bolt flange design effectively conceals the projectile weld bolt heads, resulting in a cleaner and more aesthetically pleasing hinge structure, such as a back door, when open. It also solves the problem of exposed bolt heads without increasing the hinge's fixed hinge height, avoiding the reduction in hinge mechanical properties caused by raising the hinge axis, and maintaining the hinge's bending stiffness and load-bearing capacity. Furthermore, the precisely matched design of the first through hole 11 and the second through hole 12 with the head 20 and stepped portion 21 of the bolt body 2 enhances the stability and durability of the hinge structure, reducing the risks associated with structural changes.

[0039] Please see Figures 1 to 12 In one embodiment, the inner diameter of the first through hole 11 is larger than the inner diameter of the second through hole 12, and the first through hole 11 and the second through hole 12 form a stepped hole on the hinge seat 1. The axial lengths of the first through hole 11 and the second through hole 12 are equal. The inner diameter of the second through hole 12 is larger than the outer diameter of the bolt body 2. The outer diameter of the head 20 of the bolt body 2 is smaller than the inner diameter of the first through hole 11, and the height of the head 20 of the bolt body 2 is not greater than the axial length of the first through hole 11. The stepped portion 21 is interference-fitted with the second through hole 12.

[0040] Specifically, in this embodiment of the invention, the inner diameter of the first through hole 11 on the hinge seat 1 is larger than the inner diameter of the second through hole 12, forming a stepped structure. This allows the head 20 and the stepped portion 21 of the bolt body 2 to adapt to holes of different diameters, ensuring that the bolt body 2 can be stably fixed in the hinge seat 1. The axial lengths of the first through hole 11 and the second through hole 12 are equal, meaning that the head 20 and the stepped portion 21 of the bolt body 2 have the same depth within the hinge seat 1. This helps maintain the structural balance and strength of the hinge seat 1, such as the requirement that the hinge's torsional resistance is not less than 23 N*m. The inner diameter of the second through hole 12 is larger than the outer diameter of the bolt shank of the bolt body 2, ensuring that the bolt can pass smoothly through the second through hole 12 without being obstructed during installation. At the same time, the outer diameter of the head 20 of the bolt body 2 is smaller than the inner diameter of the first through hole 11, ensuring that the head 20 of the bolt body 2 can move freely within the first through hole 11, facilitating the assembly of the hinge bolt. The height of the head 20 of the bolt body 2 is not greater than the axial length of the first through hole 11, ensuring that the head 20 of the bolt body 2 can be completely hidden in the first through hole 11, avoiding the bolt head from being exposed when the back door is opened, thus maintaining the neat appearance of the back door.

[0041] It should be noted that an interference fit is used between the stepped portion 21 and the second through hole 12 to ensure the stable fixation of the bolt body 2. The interference fit means that the size of the stepped portion 21 is slightly larger than the inner diameter of the second through hole 12. This generates a certain pressure during assembly, firmly fixing the bolt body 2 in the hinge seat 1. In other words, after the bolt body 2 is fixed to the hinge seat 1, the hinge seat 1 is then connected to the subsequent structures via the threads on the bolt body 2. This fit method between the hinge seat 1 and the bolt body 2 not only improves the stability of the hinge structure but also enhances its load-bearing capacity and bending stiffness.

[0042] In this way, the hinge structure achieves bolt head concealment without increasing the height of the fixed hinge, avoiding the reduction in mechanical properties caused by raising the hinge axis. The bending stiffness and load-bearing capacity of the hinge are maintained, meeting the structural design requirements.

[0043] Please see Figures 1 to 3 In one embodiment, the first through hole 11 and the second through hole 12 are cylindrical holes, and the head 20 and the stepped portion 21 of the bolt body 2 are cylinders corresponding to the cylindrical holes.

[0044] Specifically, in this embodiment, both the first through hole 11 and the second through hole 12 are cylindrical holes. This design simplifies the machining process and provides a stable mating interface. The head 20 and the stepped portion 21 of the bolt body 2 are also designed as cylinders to ensure matching with the through holes. This design not only ensures the symmetry and aesthetics of the structure but also helps improve the accuracy and efficiency of assembly. The opening design of the hinge fixing page uses two different sizes of cylindrical holes. Half of the base thickness uses a large cylindrical hole, namely the first through hole 11 (hereinafter the same), and the other half uses a small cylindrical hole, namely the second through hole 12 (hereinafter the same). The size of the large cylindrical hole is larger than the outer diameter of the thread to facilitate bolt assembly. The size of the small cylindrical hole matches the outer diameter of the bolt body 2 to achieve an interference fit. The machining methods for the cylindrical holes are diverse, including punching, cold heading, and milling. The machining method can be selected according to production needs and cost-effectiveness to ensure the quality and accuracy of the holes.

[0045] More specifically, a portion of the head 20 of the bolt body 2 forms a flange face 200, the diameter of which is smaller than the large cylindrical hole, i.e., the first through hole 11, of the fixing plate, to ensure that the bolt can pass through smoothly and be positioned correctly. Below the flange face 200 is the stepped surface of the stepped portion 21, which has a larger diameter than the thread and achieves an interference fit with the small cylindrical hole, i.e., the second through hole 12, which helps to improve the connection strength and sealing performance between the bolt and the fixing plate.

[0046] During assembly, the bolts are assembled from top to bottom. Utilizing the size advantage of the large cylindrical hole in the fixing page (hinge seat 1), the bolts can be directly assembled onto the stepped portion 21 of the bolt body 2. By pressing the bolt down with the equipment, the stepped portion 21 of the bolt body 2 is pressed into the cylindrical hole of the fixing page. Since there is an interference fit between the cylindrical hole and the stepped surface, the fit is tight after pressing, effectively preventing moisture from seeping in from the mating area and improving waterproof performance. Furthermore, because the depth of the large cylindrical hole in the fixing page is the same as the depth of the bolt flange, after pressing, the bolt head can be completely embedded in the outer surface of the fixing page, achieving bolt head concealment and maintaining the clean appearance of the back door.

[0047] Please see Figures 4 to 6 In one embodiment, the first through hole 11 is a tapered hole, and the head 20 of the bolt body 2 and its flange surface 200 are a tapered body and a tapered flange surface 200 corresponding to the tapered hole.

[0048] Specifically, in this embodiment, the first through hole 11 is designed as a tapered hole, which helps to improve the tightness and sealing between the bolt and the hinge fixing plate. Simultaneously, the relatively smooth transition surface of the tapered hole avoids the problem of insufficient local strength caused by the step formed by the cylindrical hole. The head 20 of the bolt body 2 and its flange face 200 are correspondingly designed as a tapered body and a tapered flange face 200 to match the tapered hole. This allows the bolt to self-guide during assembly, ensuring precise positioning. In the opening of the hinge fixing plate, half of the base thickness is a tapered structure hole, and the other half is a cylindrical hole, with its size larger than the thread of the bolt body 2. This combines the advantages of tapered and cylindrical holes, ensuring both connection strength and ease of assembly. The processing methods for the tapered hole include punching, milling, and drilling stepped holes, which can also be selected according to production needs and cost-effectiveness to ensure hole quality and accuracy.

[0049] More specifically, a portion of the flange on the head 20 of the bolt body 2 adopts a tapered structure, with a depth comparable to the tapered depth of the hinge base. This facilitates a tight fit between the flange face 200 and the fixed flange. The lower part of the tapered flange is a stepped surface with a larger diameter than the thread and an interference fit with the cylindrical bore, enhancing the stability and sealing of the connection.

[0050] During assembly, the bolts are assembled from top to bottom. Utilizing the fact that the cylindrical hole of the fixing plate (hinge seat 1) is larger than the outer diameter of the thread, it can be directly fitted onto the stepped portion 21 of the bolt body 2. By pressing the bolt down, the stepped portion 21 of the bolt body 2 is pressed into the cylindrical hole of the fixing plate. Because the cylindrical hole and the stepped surface have an interference fit, the fit is tight after pressing, effectively preventing moisture from seeping in at the mating point and improving waterproofing performance. The depth of the tapered surface of the fixing plate is the same as the bolt depth; after pressing, the bolt head is completely embedded in the outer surface of the fixing plate, achieving bolt head concealment. The bolt head and the flange face 200 of the fixing plate have a tapered structure, resulting in greater strength after pressing, providing better connection strength and durability.

[0051] Please see Figures 7 to 9 In one embodiment, the first through hole 11 is a regular hexagonal hole, and the head 20 of the bolt body 2 and its flange surface 200 are a regular hexagonal body and a regular hexagonal flange surface 200 corresponding to the regular hexagonal hole.

[0052] Specifically, in this embodiment, the first through hole 11 is configured as a regular hexagonal hole, which helps to improve the connection strength and stability between the bolt and the hinge fixing plate, i.e., the hexagonal shape is used to limit the bolt body 2 and prevent it from rotating. The head 20 of the bolt body 2 and its flange face 200 are correspondingly configured as regular hexagonal and regular hexagonal flange face 200 to match the regular hexagonal hole. This allows the bolt to be self-guided during assembly, ensuring precise positioning, and provides a larger contact area, thereby enhancing the torque strength of the connection. In the opening of the hinge fixing plate, half of the base thickness is a regular hexagonal structure hole, and the other half is a cylindrical hole, and its size is larger than the thread of the bolt body 2. Combining the advantages of regular hexagonal holes and cylindrical holes, both the strength of the connection and the ease of assembly are guaranteed. The processing methods of the regular hexagonal holes include punching, cold heading, and milling, and can be selected according to production needs and cost-effectiveness to ensure the quality and accuracy of the holes.

[0053] More specifically, a portion of the flange on the head 20 of the bolt body 2 adopts a regular hexagonal structure, the depth of which is comparable to the depth of the regular hexagonal shape of the hinge base. This facilitates a tight fit between the flange face 200 and the fixed flange. The lower part of the regular hexagonal flange has a stepped surface with a larger diameter than the thread and an interference fit with the cylindrical hole, enhancing the stability and sealing of the connection.

[0054] During assembly, the bolts are assembled from top to bottom. Taking advantage of the fact that the cylindrical hole of the fixing plate (hinge seat 1) is larger than the outer diameter of the thread, it can be directly fitted into the stepped portion 21 of the bolt body 2. By pressing the bolt down with the equipment, the stepped portion 21 of the bolt body 2 is pressed into the cylindrical hole of the fixing plate. Due to the interference fit between the cylindrical hole and the stepped surface, the fit is tight after pressing, effectively preventing moisture from seeping in from the mating area and improving waterproof performance. The depth of the hexagonal surface of the fixing plate is the same as the depth of the hexagonal flange of the bolt. After pressing, the bolt head is completely embedded in the outer surface of the fixing plate, achieving bolt head concealment. The bolt head and the flange surface 200 of the fixing plate have a hexagonal structure, resulting in strong torque strength after pressing, providing better connection strength and durability.

[0055] Please see Figures 10 to 12 In one embodiment, the first through hole 11 is a regular hexagonal pyramidal hole, and the head 20 of the bolt body 2 and its flange surface 200 are a regular hexagonal pyramidal body and a regular hexagonal pyramidal flange surface 200 corresponding to the regular hexagonal pyramidal hole.

[0056] Specifically, in this embodiment, the first through hole 11 is set as a regular hexagonal pyramidal hole to provide structural stability and increase the self-guiding capability of the connection. That is, combining the design advantages of the pyramidal hole and the hexagonal hole, it reduces the impact on the strength of the opening and also satisfies the stability of the bolt body 2 fixed on the hinge seat 1. The head 20 and the flange face 200 of the bolt body 2 are correspondingly designed as a regular hexagonal pyramidal body and a regular hexagonal pyramidal flange face 200 to match the regular hexagonal pyramidal hole, so that the bolt can be self-guided during assembly, ensuring precise positioning, and providing a larger contact area, thereby enhancing the torque strength and pull-out resistance of the connection. In the opening of the hinge fixing page, half of the base thickness is a regular hexagonal pyramidal structure hole, and the other half is a cylindrical hole, and its size is larger than that of the thread. Combining the advantages of the regular hexagonal pyramidal hole and the cylindrical hole, it ensures the strength of the connection and facilitates assembly. The processing methods of the regular hexagonal pyramidal hole include punching, cold heading and milling, which can be selected according to production needs and cost-effectiveness to ensure the quality and accuracy of the hole.

[0057] More specifically, a portion of the flange on the head 20 of the bolt body 2 adopts a regular hexagonal pyramid structure, with a depth comparable to that of the regular hexagonal pyramid of the hinge base. This facilitates a tight fit between the flange face 200 and the fixed flange. The lower part of the regular hexagonal pyramid flange has a stepped surface with a larger diameter than the thread, which provides an interference fit with the cylindrical bore, enhancing the stability and sealing of the connection.

[0058] During assembly, the bolts are assembled from top to bottom. Utilizing the fact that the cylindrical hole of the fixing plate (hinge seat 1) is larger than the outer diameter of the thread, it can be directly fitted onto the stepped portion 21 of the bolt body 2. By pressing the bolt down with the equipment, the stepped portion 21 of the bolt body 2 is pressed into the cylindrical hole of the fixing plate. Due to the interference fit between the cylindrical hole and the stepped surface, the fit is tight after pressing, effectively preventing moisture from seeping in from the mating area and improving waterproof performance. The depth of the fixed plate's hexagonal pyramidal surface is the same as the depth of the bolt's hexagonal pyramidal flange. After pressing, the bolt head is completely embedded in the outer surface of the fixing plate, achieving bolt head concealment. The bolt head and the fixed plate flange surface 200 have a hexagonal pyramidal structure, resulting in strong torque strength after pressing, providing better connection strength and durability.

[0059] In summary, this utility model provides a bolt flange embedded hinge structure. By setting matching bolt heads and hinge seat through holes, the flange face and stepped face of the bolt head respectively fit with the two through holes of the hinge seat, such as the regular hexagonal conical hole and the corresponding regular hexagonal conical bolt head, as well as the regular hexagonal conical flange face. By setting the hinge seat as half regular hexagonal hole and half cylindrical hole, the flange face and stepped face of the bolt body respectively fit with the conical hole and cylindrical hole of the hinge seat, ensuring connection strength and sealing performance. The assembled bolt body is pressed in from top to bottom, the stepped face fits tightly with the cylindrical hole, and the bolt head is completely hidden, enhancing torque strength. Thus, without sacrificing torsional performance, it achieves a combination of aesthetics and function.

[0060] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A bolted flange recessed hinge structure, characterized by, The utility model relates to a hinge seat and bolt body, comprising: a hinge seat (1) is provided with coaxial first through hole (11) and second through hole (12) on it; the flange surface (200) of the head (20) of bolt body (2) is provided with step portion (21); Wherein, the bolt body (2) passes the contour of head (20) and step portion (21) match first through hole (11) and second through hole (12) respectively, and make head (20) be located in first through hole (11).

2. The hinge structure according to claim 1, characterized in that The inner diameter of the first through hole (11) is greater than the inner diameter of the second through hole (12), and the first through hole (11) and the second through hole (12) form a stepped hole on the hinge seat (1).

3. The hinge structure according to claim 1, characterized in that, The axial length of the first through hole (11) and the second through hole (12) is equal.

4. The hinge structure according to claim 1, characterized in that, The inner diameter of the second through hole (12) is greater than the outer diameter of the screw rod of the bolt body (2).

5. The hinge structure according to claim 1, wherein The outer diameter of the head (20) of the bolt body (2) is smaller than the inner diameter of the first through hole (11), and the height of the head (20) of the bolt body (2) is not greater than the axial length of the first through hole (11).

6. The hinge structure according to claim 1, wherein The step portion (21) is in interference fit with the second through hole (12).

7. The hinge structure according to any one of claims 1 to 6, characterized in that, The first through hole (11) and the second through hole (12) are cylindrical holes, and the head (20) and the step portion (21) of the bolt body (2) are cylindrical bodies corresponding to the cylindrical holes.

8. The hinge structure according to any one of claims 1 to 6, characterized in that The first through hole (11) is a tapered hole, and the head (20) and its flange surface (200) of the bolt body (2) are a tapered body and a tapered flange surface (200) corresponding to the tapered hole.

9. The hinge structure according to any one of claims 1 to 6, characterized in that, The first through hole (11) is a regular hexagonal hole, and the head (20) and its flange surface (200) of the bolt body (2) are a regular hexagonal body and a regular hexagonal flange surface (200) corresponding to the regular hexagonal hole.

10. The hinge structure according to any one of claims 1 to 6, characterized in that, The first through hole (11) is a regular hexagonal tapered hole, and the head (20) and its flange surface (200) of the bolt body (2) are a regular hexagonal tapered body and a regular hexagonal tapered flange surface (200) corresponding to the regular hexagonal tapered hole.

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