Hinge

Abstract

The utility model provides a hinge, and relates to the technical field of connecting devices. The hinge comprises a first hinge body provided with a first rotating shaft connecting hole, and a side limiting groove is formed in the side wall of the first rotating shaft connecting hole; the rotating shaft is arranged in the first rotating shaft connecting hole in a penetrating manner; the limiting assembly comprises a fastener and a limiting wedge, the limiting wedge is arranged on the rotating shaft, the fastener is movably inserted into or withdrawn from the first rotating shaft connecting hole, the fastener abuts against the limiting wedge when inserted into the first rotating shaft connecting hole, the limiting wedge is embedded into the side limiting groove, and the fastener is separated from the limiting wedge when withdrawn from the first rotating shaft connecting hole. And the limiting wedge is reset and is separated from the side limiting groove. According to the hinge provided by the invention, the fastener is controlled to be inserted into the first rotating shaft connecting hole, the limiting wedge is embedded into the side limiting groove under the action of the fastener, and the limiting wedge is matched with the side limiting groove, so that the first hinge main body and the rotating shaft can be effectively connected, the first hinge main body and the rotating shaft are prevented from falling off, and the assembly strength of the hinge is ensured; the reliability and the stability of the hinge are improved.

Description

Technical Field

[0001] The present application relates to the technical field of connection devices, and in particular to a hinge. Background Art

[0002] A hinge, also known as a hinge, is a device used to connect two objects and allow them to rotate or swing relative to each other. A hinge typically consists of two or more interconnected metal pieces, secured to the object using rivets, bolts, or welding. As an important mechanical device, hinges offer advantages such as excellent flexibility, load-bearing capacity, noise reduction, and easy installation and adjustment. Hinges come in a wide variety of styles and are widely used in various applications.

[0003] In the related art, the hinge has low stability and is easy to fall off, posing a major safety hazard. Utility Model Content

[0004] In view of this, an object of the present application is to provide a hinge.

[0005] The technical solutions adopted by this application to solve the above technical problems are:

[0006] The present application provides a hinge, comprising:

[0007] The first hinge body is provided with a first rotating shaft connecting hole, and a side limiting groove is provided on the side wall of the first rotating shaft connecting hole;

[0008] a rotating shaft, passing through the first rotating shaft connecting hole; and

[0009] The limiting assembly includes a fastener and a limiting wedge. The limiting wedge is arranged on the rotating shaft. The fastener can be movably inserted into or withdrawn from the first rotating shaft connecting hole. When the fastener is inserted into the first rotating shaft connecting hole, it abuts against the limiting wedge, so that the limiting wedge is embedded in the side limiting groove. When the fastener withdraws from the first rotating shaft connecting hole, it separates from the limiting wedge, so that the limiting wedge is reset and disengaged from the side limiting groove.

[0010] Optionally, in some embodiments of the present application, a mounting hole is provided at the end of the rotating shaft, a through hole is provided on the side wall of the mounting hole, the limiting wedge is located in the mounting hole, and the fastener is inserted into the mounting hole so that one end of the limiting wedge passes through the through hole and is embedded in the side limiting groove.

[0011] Optionally, in some embodiments of the present application, the limiting wedge includes a first limiting section and a second limiting section that are obliquely connected, the mounting hole includes a first hole section, a second hole section and a third hole section that are connected in sequence, the first hole section is used for inserting or withdrawing a fastener, the side wall of the second hole section is provided with a through hole, the first limiting section of the limiting wedge is located in the second hole section to embed or disengage from the side limiting groove, the second limiting section of the limiting wedge is located in the third hole section, and when the first limiting section is embedded in or disengaged from the side limiting groove, the second limiting section moves in the third hole section.

[0012] Optionally, in some embodiments of the present application, a limiting protrusion is provided at the end of the mounting hole, and a limiting step is provided at the end of the first rotating shaft connecting hole. When the rotating shaft is passed through the first rotating shaft connecting hole, the limiting protrusion and the limiting step abut against each other for limiting.

[0013] Optionally, in some embodiments of the present application, the limiting assembly further includes an elastic member, which is provided on the rotating shaft and located between the rotating shaft and the limiting wedge. When the fastener is inserted into the first rotating shaft connecting hole, the elastic member is compressed to produce elastic deformation. When the fastener withdraws from the first rotating shaft connecting hole, the elastic member restores the elastic deformation to cause the limiting wedge to disengage from the side limiting groove.

[0014] Optionally, in some embodiments of the present application, a guide bevel is provided on one end of the fastener close to the limiting wedge, and a chamfer is provided on the limiting wedge. When the fastener is inserted into the first rotating shaft connecting hole, the guide bevel abuts against the chamfer.

[0015] Optionally, in some embodiments of the present application, the first rotating shaft connecting hole is a threaded hole, an external thread is provided on the peripheral wall of the fastener, and the fastener and the first rotating shaft connecting hole are threadedly connected.

[0016] Optionally, in some embodiments of the present application, the head of the fastener away from the first rotating shaft connecting hole is provided with an anti-slip structure, the anti-slip structure includes a cross groove and / or a gear, the cross groove is provided on the end face of the head of the fastener, and the gear is provided on the side wall of the head of the fastener.

[0017] Optionally, in some embodiments of the present application, the hinge further includes a second hinge body and a shaft sleeve, the second hinge body and the shaft sleeve are both sleeved on the rotating shaft, and the shaft sleeve is located between the first hinge body and the second hinge body.

[0018] Optionally, in some embodiments of the present application, the hinge further includes an adjusting member, which is sleeved on the rotating shaft and located on a side of the second hinge body away from the first hinge body.

[0019] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0020] The hinge provided in the present application controls the fastener to be inserted into the first rotating shaft connecting hole. Under the action of the fastener, the limiting wedge is embedded in the side limiting groove on the side wall of the first rotating shaft connecting hole. The cooperation between the limiting wedge and the side limiting groove can effectively connect the first hinge body and the rotating shaft, prevent the first hinge body and the rotating shaft from falling off, ensure the assembly strength of the hinge, and improve the reliability and stability of the hinge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings of the embodiments. Obviously, the drawings described below only relate to some embodiments of the present application and are not intended to limit the present application.

[0022] Figure 1 A schematic diagram of the structure of a limiting wedge embedded in a side limiting groove in a hinge provided by an embodiment of the present application;

[0023] Figure 2 for Figure 1 sectional view of

[0024] Figure 3 A schematic structural diagram of the rotating shaft provided in an embodiment of the present application;

[0025] Figure 4 for Figure 3 sectional view of

[0026] Figure 5 A schematic structural diagram of the first hinge body provided in an embodiment of the present application;

[0027] Figure 6 for Figure 5 sectional view of

[0028] Figure 7 A schematic diagram of the structure of the limiting wedge provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of the structure of a fastener provided in an embodiment of the present application;

[0030] Figure 9 A schematic diagram of the structure of the limit assembly and the rotating shaft when assembled according to an embodiment of the present application;

[0031] Figure 10 This is a schematic structural diagram of the limiting wedge disengaging the side limiting groove in the hinge provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100-hinge;

[0034] 10 - first hinge body; 11 - first shaft connection hole; 12 - side limit groove; 13 - limit step; 14 - limit flat position; 15 - sleeve; 16 - connection plate; 161 - assembly hole;

[0035] 20 - shaft; 21 - mounting hole; 22 - through hole; 23 - limiting protrusion; 24 - side mounting slot;

[0036] 30-limiting assembly; 31-fastener; 311-guide ramp; 312-anti-slip structure; 3121-cross slot; 3122-gear; 32-limiting wedge; 321-first limiting section; 322-second limiting section; 323-chamfer; 33-elastic member;

[0037] 40-second hinge body;

[0038] 50-sleeve;

[0039] 60-Adjustment piece. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a unique orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0042] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as exemplary is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is to be consistent with the widest scope consistent with the principles disclosed herein.

[0043] To facilitate understanding of the solution of the present application, the spline curves and arrows used in the drawings are explained here: the components indicated by the spline curves without arrows are solid components, that is, components with solid structures; the components indicated by the spline curves with arrows are virtual components, that is, components without solid structures.

[0044] See also Figure 1 and Figure 2 The embodiment of the present application provides a hinge 100, which includes: a first hinge body 10, provided with a first rotating shaft connecting hole 11, and a side limit groove 12 is provided on the side wall of the first rotating shaft connecting hole 11; a rotating shaft 20, which is passed through the first rotating shaft connecting hole 11; and a limit assembly 30, including a fastener 31 and a limit wedge 32, the limit wedge 32 is provided on the rotating shaft 20, the fastener 31 can be movably inserted into or withdrawn from the first rotating shaft connecting hole 11, when the fastener 31 is inserted into the first rotating shaft connecting hole 11, it abuts against the limit wedge 32, so that the limit wedge 32 is embedded in the side limit groove 12, and when the fastener 31 withdraws from the first rotating shaft connecting hole 11, it separates from the limit wedge 32, so that the limit wedge 32 is reset and disengaged from the side limit groove 12.

[0045] The hinge 100 provided in the present application controls the fastener 31 to be inserted into the first rotating shaft connecting hole 11. Under the action of the fastener 31, the limiting wedge 32 is embedded in the side limiting groove 12 on the side wall of the first rotating shaft connecting hole 11. The cooperation between the limiting wedge 32 and the side limiting groove 12 can effectively connect the first hinge body 10 and the rotating shaft 20, prevent the first hinge body 10 and the rotating shaft 20 from falling off, ensure the assembly strength of the hinge 100, and improve the reliability and stability of the hinge 100.

[0046] In some embodiments, the first shaft connection hole 11 is a threaded hole, and the peripheral wall of the fastener 31 is provided with external threads, and the fastener 31 is threadedly connected to the first shaft connection hole 11. By rotating the fastener 31 within the first shaft connection hole 11, the fastener 31 can be tightened or loosened, allowing the fastener 31 to move up and down along the threaded hole of the first shaft connection hole 11 to abut or separate from the limiting wedge 32.

[0047] In some embodiments, see Figure 3 and Figure 4 The end of the rotating shaft 20 is provided with a mounting hole 21, and the side wall of the mounting hole 21 is provided with a through hole 22. A limiting wedge 32 is located in the mounting hole 21. The fastener 31 is inserted into the mounting hole 21 so that one end of the limiting wedge 32 passes through the through hole 22 and then engages with the side limiting groove 12. It can be understood that the mounting hole 21 and the through hole 22 are connected, and the through hole 22 and the side limiting groove 12 are connected. When the fastener 31 is inserted into the mounting hole 21, it abuts against the limiting wedge 32, causing the limiting wedge 32 to engage with the side limiting groove 12. When the fastener 31 is withdrawn from the first mounting hole 21, it separates from the limiting wedge 32, causing the limiting wedge 32 to return to its original position and disengage from the side limiting groove 12.

[0048] In some embodiments, the height of the through hole 22 is greater than the height of the limiting wedge 32 , so that the limiting wedge 32 can be installed into the rotating shaft 20 through the through hole 22 .

[0049] In some embodiments, the through hole 22 extends through the side wall of one side of the mounting hole 21, and the limiting wedge 32 can be inserted into or removed from the through hole 22 of the side limiting groove 12 to be installed into the rotating shaft 20. In other embodiments, the through hole 22 extends through the side walls of the mounting hole 21 on both sides thereof. In other words, the through hole 22 extends through the rotating shaft 20, and the limiting wedge 32 can be installed into the rotating shaft 20 from the through hole 22 away from the limiting groove.

[0050] In some embodiments, the mounting hole 21 is a threaded hole, and the peripheral wall of the fastener 31 is provided with external threads, and the fastener 31 is threadedly connected to the mounting hole 21. By rotating the fastener 31 within the mounting hole 21, the fastener 31 can be tightened or loosened, and the fastener 31 can be moved up and down along the threaded hole of the mounting hole 21 to abut or separate from the limiting wedge 32.

[0051] In some embodiments, see Figure 5 and Figure 6 A limiting protrusion 23 is provided at the end of the mounting hole 21, and a limiting step 13 is provided at the end of the first rotating shaft connecting hole 11. When the rotating shaft 20 is inserted into the first rotating shaft connecting hole 11, the limiting protrusion 23 and the limiting step 13 abut to limit the position. The cooperation between the limiting protrusion 23 and the limiting step 13 can prevent the rotating shaft 20 from falling out of the first rotating shaft connecting hole 11 and can also align the through hole 22 and the side limiting groove 12.

[0052] Furthermore, the sidewalls of the limiting step 13 are further provided with limiting flats 14, and the sidewalls of the limiting protrusion 23 are further provided with anti-rotation limiting flats. When the rotating shaft 20 is inserted into the first rotating shaft connecting hole 11, the limiting flats 14 and the anti-rotation limiting flats abut against each other. The limiting edge cooperates with the anti-rotation limiting flats to secure and lock the rotating shaft 20 and the first hinge body 10, preventing the rotating shaft 20 from rotating and shaking within the first rotating shaft connecting hole 11.

[0053] In some embodiments, the limiting wedge 32 includes a first limiting section 321 and a second limiting section 322 that are connected at an angle. The mounting hole 21 includes a first hole section, a second hole section, and a third hole section that are connected in sequence. The first hole section is used for inserting or withdrawing the fastener 31. The side wall of the second hole section is provided with a through hole 22 that is connected to the side limiting groove 12. The first limiting section 321 of the limiting wedge 32 is located in the second hole section to insert into or withdraw from the side limiting groove 12. The second limiting section 322 of the limiting wedge 32 is located in the third hole section. When the first limiting section 321 is inserted into or withdrawn from the side limiting groove 12, the second limiting section 322 moves back and forth in the third hole section. By positioning the second limiting section 322 of the limiting wedge 32 in the third hole section, the limiting wedge 32 can be prevented from falling off the rotating shaft 20 when the fastener 31 is withdrawn from the mounting hole 21, or from moving arbitrarily within the through hole 22, which would make it difficult for the fastener 31 to abut against the limiting wedge 32 and be pushed into the side limiting groove 12 when it is reinserted into the mounting hole 21.

[0054] It can be understood that the displacement of the second limiting segment 322 moving forward and backward in the third hole segment is equal to the displacement of the first limiting segment 321 moving in the side limiting groove 12. In some embodiments, the width of the third hole segment is greater than or equal to the width of the side limiting groove 12. Specifically, the width of the third hole segment is S1, and the width of the side limiting groove 12 is S2, and S1 and S2 satisfy: S1 = S2 + (0.5 ~ 1mm). In this way, the first limiting segment 321 can be completely separated from the side limiting groove 12, and the disassembly of the rotating shaft 20 and the first hinge body 10 can be achieved. It should be noted that the width of the third hole segment and the side limiting groove 12 are both the widths along the direction of the through hole 22 passing through the side wall of the mounting hole 21.

[0055] In some embodiments, see Figure 7 and Figure 8 The end of the fastener 31 near the retaining wedge 32 is provided with a guiding bevel 311, and the retaining wedge 32 is provided with a chamfer 323. When the fastener 31 is inserted into the first shaft connection hole 11, the guiding bevel 311 abuts the chamfer 323. Specifically, the guiding bevel 311 is provided at the junction of the first retaining section 321 and the second retaining section 322. The chamfer 323 of the fastener 31 abuts the guiding bevel 311, pushing the first retaining section 321 into the side retaining groove 12. The combination of the guiding bevel 311 and the chamfer 323 ensures surface contact between the fastener 31 and the retaining wedge 32, increasing the contact area and facilitating the application of force by the guiding fastener 31 to the first retaining section 321, thereby avoiding the noise and increased wear caused by point or line contact.

[0056] In some embodiments, the limiting wedge 32 is elastic. Specifically, when the fastener 31 is inserted into the first shaft connection hole 11 and abuts against the limiting wedge 32, the limiting wedge 32 elastically deforms and embeds into the side limiting groove 12. When the fastener 31 is removed from the first shaft connection hole 11, it separates from the limiting wedge 32, and the limiting wedge 32 recovers its elastic deformation, returning to its original position and disengaging from the side limiting groove 12.

[0057] In some embodiments, the limiting assembly 30 also includes an elastic member 33, which is provided on the rotating shaft 20 and located between the rotating shaft 20 and the limiting wedge 32. When the fastener 31 is inserted into the first rotating shaft connecting hole 11, the elastic member 33 is compressed to produce elastic deformation. When the fastener 31 withdraws from the first rotating shaft connecting hole 11, the elastic member 33 restores the elastic deformation to cause the limiting wedge 32 to disengage from the side limiting groove 12.

[0058] Furthermore, the sidewall of the mounting hole 21 is provided with a side mounting groove 24, the opening of which is oriented in the same direction as the side limiting groove 12. An elastic member 33 is positioned within the side mounting groove 24. The elastic member 33 can be installed within the rotating shaft 20 through the opening of the side mounting groove 24. The direction in which the elastic member 33 is compressed and elastically deformed is the same as the direction in which the limiting wedge 32 moves within the side limiting groove 12. When the fastener 31 is inserted into the mounting hole 21, the second limiting segment 322 pushes on the elastic member 33, causing it to be compressed and elastically deformed. When the fastener 31 is removed from the mounting hole 21, the elastic member 33 recovers its elastic deformation, and its elastic force pushes the second limiting segment 322 to move. The movement of the second limiting segment 322 causes the first limiting segment 321 to disengage from the side limiting groove 12. The coordinated operation of the fastener 31, limiting wedge 32, and elastic member 33 effectively improves the reliability and stability of the hinge 100.

[0059] In some embodiments, the elastic member 33 may be a spring.

[0060] In some embodiments, please refer to Figure 8 The head of the fastener 31 away from the first rotating shaft connecting hole 11 is provided with an anti-slip structure 312.

[0061] Specifically, the anti-slip structure 312 includes a cross groove 3121 and / or a gear 3122 .

[0062] In some embodiments, the cross groove 3121 is provided on the end surface of the head of the fastener 31 to facilitate operation with a tool to control the rotation, tightening and loosening of the fastener 31 .

[0063] In some embodiments, the gear 3122 is disposed on the side wall of the head of the fastener 31. The gear 3122 can increase friction, making it easier for the user to manually rotate the fastener 31 when no tools are available.

[0064] In some embodiments, the hinge 100 further includes a second hinge body 40 and a sleeve 50. Both the second hinge body 40 and the sleeve 50 are sleeved on the rotating shaft 20, and the sleeve 50 is located between the first hinge body 10 and the second hinge body 40. Specifically, the second hinge body 40 includes a connecting hole for the second rotating shaft 20, and the rotating shaft 20 passes through the second connecting hole for the second rotating shaft 20.

[0065] In some embodiments, the first hinge body 10 includes a connected sleeve 15 and a connecting plate 16. The sleeve 15 is provided with a first rotating shaft connection hole 11. The connecting plate 16 is provided with an assembly hole 161 on a side away from the sleeve 15 for assembly with the structure to be assembled. It is understood that the second hinge body 40 is also provided with a connecting plate and an assembly hole. The assembly hole 161 of the first hinge body 10 and the assembly hole of the second hinge body 40 are connected to two different structures to be assembled, thereby enabling relative rotation between the two structures to be assembled.

[0066] In some embodiments, the hinge 100 further includes an adjustment member 60, which is sleeved on the rotating shaft 20 and located on the side of the second hinge body 40 away from the first hinge body 10. Specifically, the adjustment member 60 includes an adjustment nut. A partial thread is provided on the outer wall of the rotating shaft 20 away from the first hinge body 10. The adjustment nut and the partial thread are tightened together to further secure the rotating shaft 20 to the first hinge body 10 and the second hinge body 40, thereby improving assembly strength.

[0067] See also Figure 9The assembly process of the hinge 100 provided in the present application is as follows: push the elastic member 33 to the bottom of the side mounting groove 24 through the opening of the side mounting groove 24, push the limiting wedge 32 into the rotating shaft 20 through the through hole 22 passing through the rotating shaft 20, and the first limiting section 321 of the limiting wedge 32 faces the opening of the through hole 22, and the second limiting section 322 falls to the bottom of the mounting hole 21 under the action of gravity, fixing the elastic member 33 between the second limiting section 322 and the rotating shaft 20; pass the rotating shaft 20 through the first rotating shaft connecting hole 11 of the first hinge body 10, and the limiting protrusion 23 of the rotating shaft 20 abuts against the limiting step 13 of the first hinge body 10 for limiting, wherein the first limiting section 321 faces the side limiting groove of the first hinge body 10 12. After the assembly is in place, the fastener 31 is inserted into the mounting hole 21 at the end of the rotating shaft 20 and screwed in. The guide bevel 311 of the fastener 31 contacts the chamfer 323 of the limiting wedge 32, and the fastener 31 squeezes the limiting wedge 32. The limiting wedge 32 is subjected to force, and the first limiting section 321 moves toward the side limiting groove 12 to achieve the installation of the first hinge body 10 and the rotating shaft 20; the shaft sleeve 50 and the second hinge body 40 are sequentially sleeved on the rotating shaft 20, wherein the shaft sleeve 50 is located between the first hinge body 10 and the second hinge body 40, and then the adjusting piece 60 is sleeved on the side of the second hinge body 40 away from the first hinge body 10, and the adjusting piece 60 is rotated and tightened to complete the assembly of the hinge 100.

[0068] See also Figure 10 The disassembly process of the hinge 100 provided in the present application is as follows: loosen the fastener 31 by rotation, withdraw it from the mounting hole 21, and the limiting wedge 32 loses the squeezing force of the fastener 31, and moves toward the direction of disengaging from the side limiting groove 12 under the action of the elastic member 33 restoring the elastic deformation; rotate and unscrew the adjusting member 60, and take out the second hinge body 40, the shaft sleeve 50 and the first hinge body 10 in turn to complete the disassembly of the hinge 100.

[0069] The hinge 100 provided in the present application can be assembled and disassembled, and can prevent the first hinge body 10, the second hinge body 40 and the rotating shaft 20 from falling off. The components fit tightly together, and the reliability and stability are high.

[0070] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0071] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this application is hereby incorporated by reference in its entirety, except for any application history that is inconsistent with or conflicts with this application, and any document (currently or subsequently appended to this application) that limits the broadest scope of the claims of this application. It should be noted that if the descriptions, definitions, and / or terminology used in the accompanying materials are inconsistent with or conflict with the content of this application, the descriptions, definitions, and / or terminology used in this application will control.

Claims

1. A hinge, characterized in that: include: The first hinge body is provided with a first rotating shaft connecting hole, and a side limiting groove is provided on the side wall of the first rotating shaft connecting hole; a rotating shaft, passing through the first rotating shaft connecting hole; and The limiting assembly includes a fastener and a limiting wedge. The limiting wedge is provided on the rotating shaft. The fastener can be movably inserted into or withdrawn from the first rotating shaft connecting hole. When the fastener is inserted into the first rotating shaft connecting hole, it abuts against the limiting wedge, so that the limiting wedge is embedded in the side limiting groove. When the fastener withdraws from the first rotating shaft connecting hole, it separates from the limiting wedge, so that the limiting wedge is reset and disengaged from the side limiting groove.

2. The hinge according to claim 1, characterized in that The end of the rotating shaft is provided with a mounting hole, the side wall of the mounting hole is provided with a through hole, the limiting wedge is located in the mounting hole, and the fastener is inserted into the mounting hole so that one end of the limiting wedge passes through the through hole and is embedded in the side limiting groove.

3. The hinge according to claim 2, characterized in that The limiting wedge includes a first limiting section and a second limiting section that are obliquely connected, and the mounting hole includes a first hole section, a second hole section and a third hole section that are connected in sequence. The first hole section is used for inserting or withdrawing the fastener, and the side wall of the second hole section is provided with the through hole. The first limiting section of the limiting wedge is located in the second hole section to be embedded in or disengaged from the side limiting groove, and the second limiting section of the limiting wedge is located in the third hole section. When the first limiting section is embedded in or disengaged from the side limiting groove, the second limiting section moves in the third hole section.

4. The hinge according to claim 2, characterized in that A limiting protrusion is provided at the end of the mounting hole, and a limiting step is provided at the end of the first rotating shaft connecting hole. When the rotating shaft is inserted into the first rotating shaft connecting hole, the limiting protrusion and the limiting step abut against each other for limiting.

5. The hinge according to claim 1, wherein: The limiting assembly also includes an elastic member, which is provided on the rotating shaft and located between the rotating shaft and the limiting wedge. When the fastener is inserted into the first rotating shaft connecting hole, the elastic member is compressed to produce elastic deformation. When the fastener is withdrawn from the first rotating shaft connecting hole, the elastic member restores the elastic deformation to cause the limiting wedge to disengage from the side limiting groove.

6. The hinge according to claim 1, wherein: The fastener is provided with a guide slope at one end close to the limiting wedge, and the limiting wedge is provided with a chamfer. When the fastener is inserted into the first rotating shaft connecting hole, the guide slope abuts against the chamfer.

7. The hinge according to claim 1, wherein: The first rotating shaft connecting hole is a threaded hole, an external thread is provided on the peripheral wall of the fastener, and the fastener is threadedly connected to the first rotating shaft connecting hole.

8. The hinge according to claim 1, wherein: The head of the fastener away from the first rotating shaft connecting hole is provided with an anti-slip structure, and the anti-slip structure includes a cross groove and / or a gear. The cross groove is provided on the end face of the head of the fastener, and the gear is provided on the side wall of the head of the fastener.

9. The hinge according to claim 1, wherein: The hinge further includes a second hinge body and a shaft sleeve. The second hinge body and the shaft sleeve are both sleeved on the rotating shaft, and the shaft sleeve is located between the first hinge body and the second hinge body.

10. The hinge according to claim 9, characterized in that The hinge further includes an adjusting member, which is sleeved on the rotating shaft and located on a side of the second hinge body away from the first hinge body.

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