A screw anti-falling structure

Abstract

This utility model belongs to the field of fastener installation technology and provides a screw anti-loosening structure, including: a mounting body, which is set on the workpiece to be assembled. At least one side of the mounting body has a through hole. At least three limiting structures are provided on the wall of the through hole. The limiting structures are set at an angle to the radial direction of the through hole. The heads of the limiting structures form a limiting ring for the screw to pass through. The limiting structures are elastic and can undergo elastic deformation to switch between an open and closed state. The screw passes through the limiting ring, and the screw nut contacts the limiting structure and presses down on the limiting structure until the limiting structure switches from the open state to the closed state. This utility model solves the technical problem that existing screw anti-loosening structures are prone to falling off and failing during disassembly and assembly. In the closed state, the limiting structure can interfere with the screw, increasing the screw's stress strength. Reversing the screw will not cause the limiting structure to fall off, ensuring that the anti-loosening structure will not fail.

Description

Technical Field

[0001] This utility model relates to the field of fastener installation technology, and in particular to a screw anti-loosening structure. Background Technology

[0002] Screws are a common type of fastener, used in the packaging, assembly, and installation of many electronic products to connect components. Since screws may fall off due to axial force after connection, anti-fall-off structures are typically used to reduce this risk. Existing anti-fall-off structures use O-rings, where the screw is assembled and passes through the O-ring. The interference between the O-ring and the screw increases the screw's strength. However, during screw assembly and disassembly, the O-ring, being a separate component, can easily fall off if the screw is reversed during repair, rendering the anti-fall-off structure ineffective. Utility Model Content

[0003] This utility model provides a screw anti-loosening structure to solve the technical problem that existing screw anti-loosening structures are prone to falling off and failing during disassembly and assembly.

[0004] This utility model provides a screw anti-loosening structure, wherein the screw is used to connect workpieces to be assembled, and the screw anti-loosening structure includes:

[0005] An mounting body is placed on the workpiece to be assembled. At least one side of the mounting body has a through hole. The wall of the through hole is provided with at least three limiting structures. The limiting structures are set at an angle to the radial direction of the through hole. The limiting structures form a limiting ring for the screw to pass through. The limiting structures are elastic and can undergo elastic deformation to switch between an open and closed state. The screw passes through the limiting ring, and the screw nut contacts the limiting structure and presses down on the limiting structure until the limiting structure switches from the open state to the closed state.

[0006] In one embodiment of the present invention, the open / closed state is an inclined posture in which the limiting structure and the radial direction of the through hole are set at an angle, and the closed state is a horizontal posture in which the limiting structure and the radial direction of the through hole are set parallel.

[0007] When a screw is subjected to axial force, it may undergo a small axial displacement. In the closed state, the heads of multiple limiting structures can interfere with the sides of the screw, thereby increasing the screw's strength and preventing it from loosening or falling off.

[0008] In one embodiment of the present invention, the limiting structure is configured as a toothed structure, the tail of each limiting structure is integrally connected to the mounting body, and the heads of the multiple limiting structures surround to form the limiting ring. Both the mounting body and the toothed structure are made of elastic material.

[0009] When a screw is subjected to axial force, it may undergo a certain axial displacement. When the axial displacement of the screw is too large, the screw will loosen or even fall off. The mounting body itself is also elastic and can undergo a certain elastic deformation, providing a certain axial interference and enhancing the anti-loosening effect of the screw.

[0010] In one embodiment of the present invention, the screw includes a nut and a stud, the lower middle part of the stud has threads, the upper part of the stud is a smooth rod, the diameter of the nut is larger than the outer diameter of the threads, and the outer diameter of the threads is larger than the diameter of the smooth rod.

[0011] The limiting structure is located at the smooth rod. When the screw is subjected to axial force and undergoes axial displacement, the limiting structure is blocked by the screw, and can only undergo axial relative displacement with the screw at the smooth rod, and will not come out of the smooth rod range.

[0012] In one embodiment of this utility model, the diameter of the through hole is smaller than the diameter of the nut.

[0013] By designing the diameter of the through hole and the nut, it is ensured that the nut can press the limiting structure into place, so that the limiting structure is in a closed state.

[0014] In one embodiment of this utility model, the diameter of the limiting ring formed by the limiting structure in the closed state is smaller than the outer diameter of the thread and larger than the diameter of the optical rod.

[0015] The limiting structure forms a limiting ring when it is open or closed, allowing screws to be inserted for installation. After installation, the limiting structure forms a limiting ring when it is closed, which can restrict the limiting structure to the bare rod.

[0016] In one embodiment of this utility model, the diameter of the limiting ring formed by the limiting structure in the open / closed state is greater than the outer diameter of the thread.

[0017] The diameter of the retaining ring in the open / closed state is at least 0.15 mm larger than the outer diameter of the thread to provide sufficient space for the screw to be inserted and installed.

[0018] In one embodiment of this utility model, the included angle between the limiting structure and the radial direction of the through hole is 45°-60°.

[0019] By designing a limiting structure with a reasonable tilt angle, it is ensured that the screw can pass smoothly through the through hole for installation. If the opening angle is too small, it cannot be guaranteed that the screw thread can pass through the limiting ring without collision or cannot pass through at all. If the opening angle is too large, it will be difficult for the nut to press down the limiting structure to the closed state after the screw is installed, or it may be impossible to press the limiting structure down to the closed state.

[0020] In one embodiment of this utility model, the mounting body is configured as a long strip-shaped structure.

[0021] The two sides of the mounting body are rounded structures. The through holes are made on the rounded structures and form a ring. The outer diameter of the rounded structure is at least 2mm larger than the diameter of the through hole to ensure the strength of the mounting body near the through hole after the through hole is made, and to prevent the ring from breaking after long-term use.

[0022] In one embodiment of this utility model, the mounting body is fixedly connected to the workpiece to be assembled.

[0023] The mounting body can be fixed to the workpiece to be assembled by welding or other methods to enhance the stability of the structure.

[0024] The beneficial effects of this utility model are as follows: The screw anti-loosening structure proposed in this utility model is achieved by setting an mounting body on the workpiece to be assembled. The screw passes through the limiting structure formed by the limiting structure through the through hole to connect the workpiece to be assembled. The screw nut contacts the limiting structure and presses down on the limiting structure until the limiting structure switches from the open state to the closed state. In the closed state, the limiting structure can interfere with the screw, increasing the screw's stress strength. Since the limiting structure is set on the mounting body, and the mounting body is set on the workpiece, the limiting structure will not fall off due to the screw being reversed during the screw assembly and disassembly process, ensuring that the screw anti-loosening structure will not fail. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0026] In the attached diagram:

[0027] Figure 1 This is an assembly diagram of a screw anti-loosening structure provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the installation body provided in an embodiment of the present invention with the limiting structure in an open or closed state;

[0029] Figure 3 This is a schematic diagram of the installation body provided in an embodiment of the present invention with the limiting structure in a closed state;

[0030] Figure 4 This is a schematic diagram of the assembly of the screw and the mounting body according to an embodiment of the present invention.

[0031] The attached figures are labeled as follows:

[0032] 1-Mounting body; 2-Workpiece; 3-Through hole; 4-Limiting structure; 5-Round head structure; 6-Nut; 7-Smooth rod; 8-Thread. 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. 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. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0036] Please see Figures 1 to 4 This utility model provides an exemplary screw anti-loosening structure, wherein the screw is used to connect workpieces to be assembled, and the screw anti-loosening structure includes:

[0037] Mounting body 1 is mounted on workpiece 2 to be assembled. At least one side of mounting body 1 has a through hole 3. At least three limiting structures 4 are provided on the wall of the through hole 3. The limiting structures 4 are set at an angle to the radial direction of the through hole 3. The limiting structures 4 form a limiting ring for the screw to pass through. The limiting structures 4 are elastic and can undergo elastic deformation to switch between an open and closed state. The screw passes through the limiting ring, and the screw nut 6 contacts the limiting structure 4 and presses down on the limiting structure 4 until the limiting structure 4 switches from the open state to the closed state.

[0038] In the screw anti-loosening structure provided by this utility model, by setting the mounting body 1 on the workpiece 2 to be assembled, the screw passes through the limiting structure 4 formed by the limiting structure 4 of the through hole 3 to connect the workpiece 2 to be assembled. The screw nut 6 contacts the limiting structure 4 and presses down on the limiting structure 4 until the limiting structure 4 switches from the open state to the closed state. In the closed state, the limiting structure 4 can interfere with the screw, increasing the force strength of the screw. Since the limiting structure 4 is set on the mounting body 1, and the mounting body 1 is set on the workpiece 2, the limiting structure 4 will not fall off due to the reverse rotation of the screw during the screw disassembly and assembly process, ensuring that the screw anti-loosening structure will not fail.

[0039] In this embodiment, the open / closed state is an inclined posture in which the limiting structure 4 and the through hole 3 are set at an angle to each other radially, and the closed state is a horizontal posture in which the limiting structure 4 and the through hole 3 are set parallel to each other radially. Specifically, the diameter of the limiting ring formed by the limiting structure 4 in the open / closed state is larger than the diameter of the limiting ring formed in the closed state. When the screw is subjected to axial force, it may have a small axial displacement. In the closed state, the heads of the multiple limiting structures 4 can interfere with the side of the screw, thereby increasing the force strength of the screw and thus preventing the screw from loosening or falling off under force.

[0040] In some embodiments, the limiting structure 4 is configured as a toothed structure, and the tail of each limiting structure 4 is integrally connected to the mounting body 1. The heads of multiple limiting structures 4 surround to form a limiting ring. Both the mounting body 1 and the toothed structure are made of elastic material. Specifically, the limiting structure 4 and the mounting body 1 are integrally formed by a mold. The mounting body 1 and the limiting structure 4 can be elastic metals, such as phosphor bronze, beryllium bronze, stainless steel, etc. This is not limited here. When the screw is subjected to axial force, a certain axial displacement may occur. When the axial displacement of the screw is too large, the screw will loosen or even fall off. The mounting body 1 itself is also elastic and can undergo a certain elastic deformation, providing a certain axial interference and strengthening the anti-fall-off effect of the screw.

[0041] It is worth noting that the screw includes a nut 6 and a stud. The lower middle part of the stud has threads 8, and the upper part of the stud is a smooth rod 7. The diameter of the nut 6 is larger than the outer diameter of the threads 8, and the outer diameter of the threads 8 is larger than the diameter of the smooth rod 7. Specifically, in this embodiment, the outer diameter of the threads 8 is 0.3mm-0.6mm larger than the diameter of the smooth rod 7. This ensures that when the limiting structure 4 is in the closed state, the limiting structure 4 is located at the smooth rod 7. When the screw is subjected to axial force and undergoes axial displacement, the limiting structure 4 is blocked by the threads 8 and can only undergo axial relative displacement with the screw at the smooth rod 7, without falling out of the range of the smooth rod 7.

[0042] Furthermore, each limiting structure 4 has a width ≥ 0.66 mm and a length ≥ 0.85 mm. The toothed structure with this design facilitates mold forming and maintains the life of the mold cutting tools. The length of the guide rod 7 is at least 0.2 mm greater than the thickness of the limiting structure 4 to ensure sufficient displacement between the limiting structure 4 and the guide rod 7.

[0043] In the above embodiment, the diameter of the through hole 3 is smaller than the diameter of the nut 6. Specifically, the diameter of the through hole 3 is at least 0.4 mm smaller than the diameter of the nut 6. When installing the screw, the nut 6 contacts the limiting structure 4 and presses the limiting structure 4 down until the nut 6 contacts the mounting body 1. The nut 6 stops being blocked by the mounting body 1, indicating that the screw is installed in place. At this time, the limiting structure 4 undergoes elastic deformation under the pressure of the nut 6, switching from the open state to the closed state. Through the design of the diameter of the through hole 3 and the diameter of the nut 6, it is ensured that the nut 6 can press the limiting structure 4 down into place, so that the limiting structure 4 is in the closed state. At the same time, during the screw installation process, the nut 6 contacts each limiting structure 4 evenly, so that the limiting structure 4 is subjected to uniform force, avoiding the problem of fatigue fracture caused by long-term stress on a single limiting structure 4.

[0044] Furthermore, the diameter of the limiting ring formed by the limiting structure 4 in the closed state is smaller than the outer diameter of the thread 8 and larger than the diameter of the smooth rod 7. This design allows the limiting ring formed by the limiting structure 4 in the open state to allow screws to be inserted for installation. After installation, the limiting ring formed by the limiting structure 4 in the closed state can restrict the limiting structure 4 to the smooth rod 7. Specifically, Where d is the diameter of the limiting ring in the closed state, D1 is the diameter of the smooth rod 7, and D2 is the outer diameter of the thread 8. By designing a reasonable diameter of the limiting ring in the closed state, the limiting structure 4 can restrict the axial position of the screw within the range of the smooth rod 7 in the closed state. The upper and lower sides restrict the axial displacement of the screw through the cooperation of the nut 6, the thread 8 and the limiting structure 4, respectively. The screw can have sufficient axial displacement while being restricted, making it less likely to fall off.

[0045] In detail, the diameter of the limiting ring formed by the limiting structure 4 in the open and closed state is larger than the outer diameter of the thread 8. The diameter of the limiting ring in the open and closed state is at least 0.15 mm larger than the outer diameter of the thread 8 to provide sufficient space for the screw to be inserted and installed.

[0046] In some embodiments, the radial angle between the limiting structure 4 and the through hole 3 is 45°-60°. By designing a reasonably tilted limiting structure 4, it is ensured that the screw can smoothly pass through the through hole 3 for installation. If the opening angle is too small, it cannot be guaranteed that the screw thread 8 can pass through the limiting ring without collision or cannot pass through at all. If the opening angle is too large, it will be difficult for the nut 6 to press the limiting structure 4 to the closed state after the screw is installed, or it may be impossible to press the limiting structure 4 to the closed state. Specifically, the formula for calculating the included angle is as follows: Where A is the radial angle between the limiting structure 4 and the through hole 3, R1 is the radius of the through hole 3, R2 is the radius of the limiting ring in the open / closed state, L is the length of the limiting structure 4, and B is the thickness of the limiting structure 4.

[0047] In this embodiment, the mounting body 1 is configured as a long strip-shaped structure. The mounting body 1 is fixed to the workpiece 2 to be assembled. Specifically, the mounting body 1 can be fixed to the workpiece 2 to be assembled by welding or other means to enhance the stability of the structure. The two sides of the mounting body 1 are round head structures 5. The through hole 3 is opened on the round head structure 5 and forms a ring. The outer diameter of the round head structure 5 is at least 2mm larger than the diameter of the through hole 3 to ensure the strength of the mounting body 1 near the through hole 3 after the through hole 3 is opened, and to avoid the ring from breaking after long-term use.

[0048] In summary, in the screw anti-loosening structure provided by this utility model, by setting the mounting body 1 on the workpiece 2 to be assembled, the screw passes through the limiting structure 4 formed by the limiting structure 4 of the through hole 3 to connect the workpiece 2 to be assembled. The screw nut 6 contacts the limiting structure 4 and presses down on the limiting structure 4 until the limiting structure 4 switches from the open state to the closed state. In the closed state, the limiting structure 4 can interfere with the screw, increasing the screw's stress strength. Since the limiting structure 4 is set on the mounting body 1, and the mounting body 1 is set on the workpiece 2, the limiting structure 4 will not fall off due to the reverse rotation of the screw during the screw disassembly and assembly process, ensuring that the screw anti-loosening structure will not fail.

[0049] 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 screw anti-loosening structure, wherein the screw is used to connect workpieces to be assembled, characterized in that, include: An mounting body is placed on the workpiece to be assembled. At least one side of the mounting body has a through hole. The wall of the through hole is provided with at least three limiting structures. The limiting structures are set at an angle to the radial direction of the through hole. The limiting structures form a limiting ring for the screw to pass through. The limiting structures are elastic and can undergo elastic deformation to switch between an open and closed state. The screw passes through the limiting ring, and the screw nut contacts the limiting structure and presses down on the limiting structure until the limiting structure switches from the open state to the closed state.

2. The screw anti-loosening structure according to claim 1, characterized in that, The open / closed state is an inclined posture in which the limiting structure is set at an angle to the radial direction of the through hole, and the closed state is a horizontal posture in which the limiting structure is set parallel to the radial direction of the through hole.

3. The screw anti-loosening structure according to claim 1, characterized in that, The limiting structure is configured as a toothed structure, and the tail of each limiting structure is integrally connected to the mounting body. The heads of multiple limiting structures are gathered to form the limiting ring. Both the mounting body and the toothed structure are made of elastic material.

4. The screw anti-loosening structure according to claim 1, characterized in that, The screw includes a nut and a stud. The lower middle part of the stud has threads, and the upper part of the stud is a smooth shank. The diameter of the nut is larger than the outer diameter of the threads, and the outer diameter of the threads is larger than the diameter of the smooth shank.

5. The screw anti-loosening structure according to claim 4, characterized in that, The diameter of the through hole is smaller than the diameter of the nut.

6. The screw anti-loosening structure according to claim 4, characterized in that, The diameter of the limiting ring formed by the limiting structure in the closed state is smaller than the outer diameter of the thread and larger than the diameter of the optical rod.

7. The screw anti-loosening structure according to claim 4 is characterized in that, The diameter of the limiting ring formed by the limiting structure in the open / closed state is larger than the outer diameter of the thread.

8. The screw anti-loosening structure according to claim 1, characterized in that, The included angle between the limiting structure and the radial direction of the through hole is 45°-60°.

9. The screw anti-loosening structure according to claim 1, characterized in that, The mounting body is configured as a long strip-shaped structure.

10. The screw anti-loosening structure according to claim 1, characterized in that, The mounting body is fixed to the workpiece to be assembled.

Images