Anti-vibration screw with elastic sleeve structure
By designing an elastic sleeve structure on the screw to enhance friction and sealing, the problem of screw loosening and rusting in vibration and humid environments is solved, achieving higher durability and shock resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN GANGGU HARDWARE PROD CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-06-12
AI Technical Summary
Existing screws are prone to losing their tightening function after prolonged use, have poor shock resistance, and are easily loosened or rusted in vibrating and humid environments, affecting their service life and durability.
The anti-vibration screw adopts a flexible sleeve structure, including upper and lower elastic sleeves, anti-slip seat, waterproof plug and reverse pull force connection design, which enhances friction and sealing, and prevents loosening and rusting.
It improves the tightness and durability of screw connections, prevents loosening and rusting, and extends service life.
Smart Images
Figure CN224352254U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of screw technology, specifically relating to an anti-vibration screw with an elastic sleeve structure. Background Technology
[0002] Existing screws, after prolonged use, tend to gradually lose their tightening function and have poor shock resistance, reducing their service life and durability. The "Durable Shock-Resistant Screw" disclosed in application number "CN202023346961.8" represents an increasingly mature technology. This technology involves placing a first washer, a spring, and a second washer onto the screw body. Then, when the locating pin is installed on the spring and second washer, a buffer spring is first installed. The first washer and the nut are then held in place by both hands, aligning one end of the screw body with the desired connection hole. The nut is then screwed in through the cross-shaped groove, completing the tightening process. The installation greatly improves the wear resistance and fastening performance of the screws, as well as their shock absorption capacity. However, the device also has the following drawbacks: After the screws are installed, when they are used to connect to the surface of vibrating screens or high-strength pulling equipment in different devices, the connection of the screw body needs to be reinforced. Long-term vibration will cause the screw to impact the inner wall of the threaded hole, damaging the structure of the screw's thread groove, leading to metal fatigue and screw breakage. At the same time, the thread groove and the screw surface will loosen, resulting in an insufficiently tight connection. In a humid working environment, the bolt surface will rust, which will also affect the strength of the screw. Utility Model Content
[0003] The purpose of this invention is to provide an anti-vibration screw with an elastic sleeve structure, which aims to solve the problems raised in the prior art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: It includes a main screw, a main nut fixedly connected to the top of the main screw, an upper elastic sleeve threadedly connected to the top of the main screw, a lower elastic sleeve threadedly connected to the bottom of the main screw, an upper anti-slip seat on the top of the upper elastic sleeve, a lower anti-slip seat on the bottom of the lower elastic sleeve, and several circular protrusions distributed at the bottom of the upper anti-slip seat and the top of the lower anti-slip seat in a wave-like pattern. A trapezoidal waterproof plug is provided at the bottom of the main nut, and a trapezoidal groove is formed on the top of the upper anti-slip seat, the size of which matches the size of the trapezoidal waterproof plug and the trapezoidal groove.
[0005] In one embodiment of the anti-vibration screw with an elastic sleeve structure of the present invention, the inner walls of the upper elastic sleeve and the lower elastic sleeve are provided with a PVE elastic layer, and the outer walls of the upper elastic sleeve and the lower elastic sleeve are provided with a high-strength wear-resistant layer.
[0006] In this solution, the upper elastic sleeve is pre-installed into the hole to be connected during the installation process. Then, the main screw is installed and screwed into the threaded connection of the inner wall of the PVE elastic layer. After that, the lower elastic sleeve is screwed in, and the ends of the upper and lower elastic sleeves are aligned. At this time, the circular protrusions on the upper and lower anti-slip seats release the surface of the connecting parts, increasing the friction.
[0007] In one embodiment of the anti-vibration screw with an elastic sleeve structure of the present invention, the bottom side of the main nut and the top side of the upper anti-slip seat are engraved with diamond-shaped textures.
[0008] In this design, the trapezoidal waterproof plug at the bottom of the main nut is inserted into the trapezoidal groove, which improves the tightness between the main nut and the upper anti-slip seat and enhances the sealing performance, preventing water leakage that could cause rust on the threads of the main screw. The engraved diamond-shaped texture increases the friction between the main nut and the upper anti-slip seat, improving the tightness between the parts and preventing loosening at the connection point during severe vibration.
[0009] In one embodiment of the anti-vibration screw with an elastic sleeve structure of this utility model, a hard drill bit is provided at the bottom end of the main screw, and a reverse thread is engraved on the outer wall of the hard drill bit, and an anti-slip nut is connected to the thread on the outer wall of the hard drill bit.
[0010] In this solution, after the main screw is installed, the anti-slip nut is connected to the hard drill bit to form a reverse pulling force, which prevents the internal threaded connection from moving due to frequency vibration during the vibration process, thus avoiding loosening of the main screw threaded connection.
[0011] In one embodiment of the anti-vibration screw with an elastic sleeve structure of this utility model, the top of the anti-slip nut is provided with a hard threaded cylinder, the bottom of the lower anti-slip seat is provided with a threaded groove, and the hard threaded cylinder is threadedly connected to the threaded groove.
[0012] In this solution, when installing the anti-slip nut, the hard threaded cylinder is connected to the corresponding threaded groove on the lower anti-slip seat to improve the tightness of the connection between the lower anti-slip seat and the anti-slip nut. Similar to the reverse pulling force of the hard drill bit, a second reverse connection structure is formed at the end of the main screw to further strengthen the tightness of the hard drill bit connection.
[0013] In one embodiment of the anti-vibration screw with an elastic sleeve structure of this utility model, the bottom of the inner wall of the upper elastic sleeve and the top of the inner wall of the lower elastic sleeve are provided with corrosion-resistant and waterproof rubber rings.
[0014] In this solution, after the ends of the lower elastic sleeve and the upper elastic sleeve are aligned, as the upper and lower elastic sleeves are tightened and squeezed inward, the adjacent corrosion-resistant and waterproof rubber rings are squeezed against each other, sealing the joint between the upper and lower elastic sleeves and preventing moisture from entering the threaded hole in the PVE elastic layer through the joint between the upper and lower elastic sleeves.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1) By inserting the platform-shaped waterproof plug at the bottom of the main nut into the platform-shaped groove, the tightness between the main nut and the upper anti-slip seat is improved, and the sealing performance is also improved, preventing water leakage from causing rust on the threaded surface of the main screw. After the upper elastic sleeve and the lower elastic sleeve are connected, the corrosion-resistant waterproof rubber ring is used to prevent water vapor from entering the threaded hole of the PVE elastic layer, which would cause rust on the surface of the main screw. The connection strength between the upper elastic sleeve and the lower elastic sleeve is improved through high-strength friction resistance, preventing breakage.
[0017] 2) By connecting the anti-slip nut to the hard drill bit, a reverse pulling force is formed. The hard threaded cylinder is connected to the corresponding thread groove on the lower anti-slip seat, which improves the tightness of the connection between the lower anti-slip seat and the anti-slip nut. This prevents the internal threaded connection from moving due to frequency vibration during the vibration process, which would cause the main screw threaded connection to loosen. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0021] Figure 3 This is a schematic diagram of the measuring rod structure of this utility model.
[0022] In the diagram: 1. Main screw; 2. Main nut; 3. Upper elastic sleeve; 4. Lower elastic sleeve; 5. Upper anti-slip seat; 6. Lower anti-slip seat; 7. Circular protrusion; 8. Terrace-shaped waterproof plug; 9. Terrace-shaped groove; 10. PVE elastic layer; 11. High-strength wear-resistant layer; 12. Hardened drill bit; 13. Anti-slip nut; 14. Hardened threaded sleeve; 15. Threaded groove; 16. Corrosion-resistant waterproof rubber ring. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figure 1-3 The present invention provides the following technical solution: an anti-vibration screw with an elastic sleeve structure, including a main screw 1, a main nut 2 fixedly connected to the top of the main screw 1, an upper elastic sleeve 3 threadedly connected to the top of the main screw 1, a lower elastic sleeve 4 threadedly connected to the bottom of the main screw 1, an upper anti-slip seat 5 provided at the top of the upper elastic sleeve 3, a lower anti-slip seat 6 provided at the bottom of the lower elastic sleeve 4, a plurality of circular protrusions 7 distributed at the bottom of the upper anti-slip seat 5 and the top of the lower anti-slip seat 6, the circular protrusions 7 being distributed in a wave pattern, a platform-shaped waterproof plug 8 provided at the bottom of the main nut 2, a platform-shaped groove 9 provided at the top of the upper anti-slip seat 5, the platform-shaped waterproof plug 8 and the platform-shaped groove 9 being matched in size.
[0025] In a specific embodiment of an anti-vibration screw with an elastic sleeve structure, please refer to... Figure 2 The inner walls of the upper elastic sleeve 3 and the lower elastic sleeve 4 are provided with a PVE elastic layer 10, and the outer walls of the upper elastic sleeve 3 and the lower elastic sleeve 4 are provided with a high-strength wear-resistant layer 11.
[0026] Please see Figure 2 During installation, the upper elastic sleeve 3 is pre-installed into the hole to be connected. Then, the main screw 1 is installed and screwed into the threaded connection of the inner wall of the PVE elastic layer 10. Then, the lower elastic sleeve 4 is screwed in and the ends of the upper elastic sleeve 3 and the lower elastic sleeve 4 are aligned. At this time, the circular protrusions 7 on the upper anti-slip seat 5 and the lower anti-slip seat 6 release the surface of the connecting parts and increase the friction. After the main screw 1 is fully installed into the upper elastic sleeve 3 and the lower elastic sleeve 4.
[0027] In a specific embodiment of an anti-vibration screw with an elastic sleeve structure, please refer to... Figure 2-3 The bottom side of the main nut 2 and the top side of the upper anti-slip seat 5 are engraved with diamond-shaped textures.
[0028] Please see Figure 2-3 The trapezoidal waterproof plug 8 at the bottom of the main nut 2 is inserted into the trapezoidal groove 9, which improves the tightness between the main nut 2 and the upper anti-slip seat 5 and improves the sealing performance, preventing water leakage and rusting at the threaded part of the main screw 1. The engraved diamond texture increases the friction between the main nut 2 and the upper anti-slip seat 5, improves the tightness between the parts, and prevents the connection from loosening during severe vibration.
[0029] In a specific embodiment of an anti-vibration screw with an elastic sleeve structure, please refer to... Figure 3 The bottom end of the main screw 1 is provided with a hard drill bit 12, the outer wall of the hard drill bit 12 is engraved with reverse threads, and the outer wall of the hard drill bit 12 is threaded with an anti-slip nut 13.
[0030] Please see Figure 3 After the main screw 1 is installed, connect the anti-slip nut 13 to the hard drill bit 12 to form a reverse pulling force, so as to prevent the internal thread connection from moving due to frequency vibration during the vibration process, which would cause the thread connection of the main screw 1 to loosen.
[0031] In a specific embodiment of an anti-vibration screw with an elastic sleeve structure, please refer to... Figure 3 The anti-slip nut 13 has a hard threaded cylinder 14 at the top and a threaded groove 15 at the bottom of the lower anti-slip seat 6. The hard threaded cylinder 14 is threadedly connected to the threaded groove 15.
[0032] Please refer to the figure: When installing the anti-slip nut 13, the hard threaded cylinder 14 is connected to the corresponding threaded groove 15 on the lower anti-slip seat 6 to improve the tightness of the connection between the lower anti-slip seat 6 and the anti-slip nut 13. Similar to the reverse pulling force of the hard drill bit 12, a second reverse connection structure is formed at the end of the main screw 1 to further strengthen the tightness of the connection of the hard drill bit 12.
[0033] In a specific embodiment of an anti-vibration screw with an elastic sleeve structure, please refer to... Figure 3 Corrosion-resistant and waterproof rubber rings 16 are provided on the bottom of the inner wall of the upper elastic sleeve 3 and the top of the inner wall of the lower elastic sleeve 4.
[0034] Please see Figure 3 After the ends of the lower elastic sleeve 4 and the upper elastic sleeve 3 are aligned, as the upper elastic sleeve 3 and the lower elastic sleeve 4 are tightened and squeezed inward, the adjacent corrosion-resistant and waterproof rubber rings 16 are squeezed against each other, sealing the joint between the upper elastic sleeve 3 and the lower elastic sleeve 4, and preventing moisture from entering the threaded hole in the PVE elastic layer 10 through the joint between the upper elastic sleeve 3 and the lower elastic sleeve 4.
[0035] This utility model provides an anti-vibration screw with an elastic sleeve structure. The specific usage is as follows: the upper elastic sleeve 3 is pre-installed into the hole to be connected, then the main screw 1 is installed and screwed into the threaded connection of the inner wall of the PVE elastic layer 10. Next, the lower elastic sleeve 4 is screwed in, aligning the ends of the upper and lower elastic sleeves 3 and 4. At this time, the circular protrusions 7 on the upper and lower anti-slip seats 5 and 6 release the connecting parts, increasing friction. After the main screw 1 is fully installed into the upper and lower elastic sleeves 3 and 4, the trapezoidal waterproof plug 8 at the bottom of the main nut 2 is inserted into the trapezoidal groove 9, raising the main nut 2 and the upper anti-slip seat 5. The tightness between them also improves the sealing performance, preventing water leakage and rusting at the threads on the surface of the main screw 1. The engraved diamond texture increases the friction between the main nut 2 and the upper anti-slip seat 5, improving the tightness between the parts and preventing loosening at the connection during severe vibration. The anti-slip nut 13 is connected to the hard drill bit 12 to form a reverse pulling force. The hard threaded cylinder 14 is connected to the corresponding threaded groove 15 on the lower anti-slip seat 6, improving the tightness of the connection between the lower anti-slip seat 6 and the anti-slip nut 13, and preventing the internal threaded connection from moving due to frequency vibration during vibration, which could cause loosening at the threaded connection of the main screw 1.
[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A shock-resistant screw with an elastic sleeve structure, comprising a main screw (1), characterized in that: The main screw (1) is fixedly connected to the top of the main screw (2), the top of the main screw (1) is threadedly connected to the upper elastic sleeve (3), the bottom of the main screw (1) is threadedly connected to the lower elastic sleeve (4), the top of the upper elastic sleeve (3) is provided with an upper anti-slip seat (5), the bottom of the lower elastic sleeve (4) is provided with a lower anti-slip seat (6), the bottom of the upper anti-slip seat (5) and the top of the lower anti-slip seat (6) are provided with a number of circular protrusions (7), the circular protrusions (7) are distributed in a wave pattern, the bottom of the main screw (2) is provided with a platform-shaped waterproof plug (8), the top of the upper anti-slip seat (5) is provided with a platform-shaped groove (9), and the size of the platform-shaped waterproof plug (8) matches the size of the platform-shaped groove (9).
2. The anti-vibration screw according to claim 1, characterized in that: The inner walls of the upper elastic sleeve (3) and the lower elastic sleeve (4) are provided with a PVE elastic layer (10), and the outer walls of the upper elastic sleeve (3) and the lower elastic sleeve (4) are provided with a high-strength wear-resistant layer (11).
3. The anti-vibration screw according to claim 1, characterized in that: The bottom side of the main nut (2) and the top side of the upper anti-slip seat (5) are engraved with diamond-shaped textures.
4. The anti-vibration screw according to claim 1, characterized in that: The main screw (1) is provided with a hard drill bit (12) at the bottom end. The hard drill bit (12) has a reverse thread engraved on its outer wall, and an anti-slip nut (13) is threaded onto the outer wall of the hard drill bit (12).
5. The anti-vibration screw according to claim 4, characterized in that: The anti-slip nut (13) has a hard threaded cylinder (14) at the top, and the lower anti-slip seat (6) has a threaded groove (15) at the bottom. The hard threaded cylinder (14) is threadedly connected to the threaded groove (15).
6. The anti-vibration screw according to claim 1, characterized in that: The bottom of the inner wall of the upper elastic sleeve (3) and the top of the inner wall of the lower elastic sleeve (4) are provided with corrosion-resistant and waterproof rubber rings (16).