A replaceable anti-theft nut
By designing a replaceable anti-theft nut, the problems of thread ring wear and theft prevention are solved, realizing convenient replacement of the thread ring and anti-theft function, reducing maintenance costs, and improving the stability and security of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU JUNWEI IND INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-05-29
AI Technical Summary
Existing nuts are prone to wear, stripping, deformation, and corrosion of the threaded ring during long-term use, leading to loosening or detachment of the connection. Furthermore, the one-piece structure makes it impossible to replace the threaded ring separately, increasing maintenance costs and inconvenience.
A replaceable anti-theft nut was designed, comprising an outer ring nut and an inner ring nut. The threaded ring can be easily replaced through a sliding block and a locking block structure, and unauthorized disassembly is prevented through an anti-theft shell and a locking post structure. A spring is used to provide elastic support and locking function.
It enables convenient replacement of threaded rings, reduces maintenance costs, prevents nut theft, and improves connection stability and anti-theft security.
Smart Images
Figure CN224301214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nut technology, and in particular to a replaceable anti-theft nut. Background Technology
[0002] Nuts, as an indispensable basic connecting component in the field of mechanical engineering, are widely used in many fields such as industrial manufacturing, construction, transportation, and municipal facilities. Their function is to cooperate with bolts and use the friction and preload generated by the thread engagement to fasten two or more parts into a whole, ensuring the stability and safety of equipment and structures.
[0003] In existing technology, the mechanical structure and technical principle of nuts are based on the fundamental characteristics of threaded connections. Ordinary nuts are usually one-piece structures, with the main body in the shape of hexagons, circles, etc., and the inner wall is machined with threads that match the bolt. The thread profiles are mostly triangular, rectangular, trapezoidal, etc., and the connection with the bolt is achieved through the interlocking of the threads.
[0004] However, in the long-term use of existing nuts, due to frequent disassembly and assembly operations, corrosion from the external environment, and vibration and friction during equipment operation, the internal thread rings are prone to wear, stripping, deformation, and corrosion. Once these damages occur, the nut and bolt cannot form a tight engagement, leading to loose connections, uneven stress, and in severe cases, even detachment, affecting the normal operation of equipment or structures. Since most existing nuts are one-piece structures, the internal thread rings cannot be replaced individually; when the thread rings are damaged, the entire nut must be replaced. This not only wastes parts and increases replacement costs, but also, especially in large equipment or infrastructure, nut replacement often requires significant manpower, resources, and time, further increasing maintenance costs and causing considerable inconvenience to production and maintenance work. Therefore, a replaceable anti-theft nut is proposed to solve these problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a replaceable anti-theft nut, which aims to improve the problems of wear, stripping, deformation, and corrosion of the thread ring of the nut in the prior art, and the fact that the thread ring of the nut cannot be replaced.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A replaceable anti-theft nut includes an outer ring nut, an anti-theft component is provided on the outer wall of the outer ring nut, a threaded rod is threadedly connected to the inner wall of the outer ring nut, and a replacement component is provided on the inner wall of the outer ring nut;
[0008] The replacement component includes an inner ring nut, the outer wall of which is slidably connected to the inner wall of an outer ring nut. A sliding block is fixedly connected to the outer wall of the inner ring nut. A slot is formed inside the sliding block. The outer wall of the sliding block is slidably connected to the inner wall of the outer ring nut. A sliding groove is formed inside the outer ring nut. A locking block is slidably connected to the inner wall of the outer ring nut. A pull rod is fixedly connected to the outer wall of the locking block. The outer wall of the pull rod is slidably connected to the inner wall of the sliding groove. A limit block is fixedly connected to one end of the locking block. A spring is provided inside the outer ring nut. One end of the spring is fixedly connected to the inner wall of the outer ring nut, and the other end of the spring is fixedly connected to the outer wall of the limit block.
[0009] As a further description of the above technical solution:
[0010] The anti-theft assembly includes a lower anti-theft shell, the inner wall of which is sleeved on the outer wall of the outer ring nut, and an upper anti-theft shell is slidably connected to the inner wall of the lower anti-theft shell.
[0011] As a further description of the above technical solution:
[0012] The inner wall of the upper anti-theft shell is fitted onto the outer wall of the outer ring nut, and a fixing hole is provided inside the upper anti-theft shell.
[0013] As a further description of the above technical solution:
[0014] The inner wall of the lower anti-theft shell is slidably connected to a locking post, and the outer wall of the locking post is slidably connected to the inner wall of the fixing hole.
[0015] As a further description of the above technical solution:
[0016] The outer wall of the locking post is fixedly connected to a limiting ring, and the outer wall of the limiting ring is slidably connected to the inner wall of the lower anti-theft shell.
[0017] As a further description of the above technical solution:
[0018] A second spring is fitted on the outer wall of the locking post. One end of the second spring is fixedly connected to the inner wall of the lower anti-theft shell, and the other end of the second spring is fixedly connected to the outer wall of the limiting ring.
[0019] As a further description of the above technical solution:
[0020] A handle is fixedly connected to the outer wall of the locking post, and a threaded nail is threadedly connected to the inner wall of the lower anti-theft shell, with the outer wall of the threaded nail threadedly connected to the inner wall of the locking post.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, the sliding block slides on the inner wall of the outer ring nut, and then moves to the slot through the locking block, thereby achieving the effect of replacing the inner ring nut. This avoids problems such as wear, stripping, deformation, and corrosion of the nut's thread ring, which would cause the nut and bolt to not mesh tightly, leading to loose connection, uneven force, or even detachment. By replacing the thread ring, the fastening function of the nut is restored to normal, and the replacement cost is reduced.
[0023] 2. In this utility model, the locking pin is moved into the fixing hole, and then the lower anti-theft shell and the locking pin are connected by the threaded nail, which achieves the effect of preventing theft of the thread. This avoids the problem that ordinary nuts are easily disassembled by wrenches and other general tools for outdoor facilities, public equipment or industrial parts, which could lead to theft of parts and direct economic losses. This increases the difficulty of illegal disassembly and improves the anti-theft security of facilities and equipment. Attached Figure Description
[0024] Figure 1 This is a three-dimensional schematic diagram of a replaceable anti-theft nut proposed in this utility model;
[0025] Figure 2 This is a schematic diagram of the outer ring nut of a replaceable anti-theft nut proposed in this utility model;
[0026] Figure 3 This is a schematic diagram of the inner ring nut of a replaceable anti-theft nut proposed in this utility model;
[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0028] Figure 5 This is a schematic diagram of the lower anti-theft shell of a replaceable anti-theft nut proposed in this utility model;
[0029] Figure 6 for Figure 5 Enlarged view of point B in the middle.
[0030] Legend:
[0031] 1. Threaded rod; 2. Outer ring nut; 3. Inner ring nut; 4. Sliding block; 5. Slot; 6. Sliding groove; 7. Locking block; 8. Pull rod; 9. Limiting block; 10. Spring 1; 11. Lower anti-theft shell; 12. Upper anti-theft shell; 13. Fixing hole; 14. Locking post; 15. Limiting ring; 16. Spring 2; 17. Handle; 18. Threaded nail. Detailed Implementation
[0032] 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.
[0033] Reference Figures 1-3 One embodiment of this utility model is a replaceable anti-theft nut, including an outer ring nut 2, an anti-theft component provided on the outer wall of the outer ring nut 2, a threaded rod 1 threadedly connected to the inner wall of the outer ring nut 2, and a replacement component provided on the inner wall of the outer ring nut 2.
[0034] The replacement component includes an inner ring nut 3, whose outer wall is slidably connected to the inner wall of the outer ring nut 2. The inner ring nut 3 slides against the inner wall of the outer ring nut 2, facilitating installation and removal. A sliding block 4 is fixedly connected to the outer wall of the inner ring nut 3. The sliding block 4 is used to embed into the sliding groove 6 of the outer ring nut 2, restricting the rotation of the inner ring nut 3 in the circumferential direction. A slot 5 is provided inside the sliding block 4, which engages with a locking block 7 to fix the position of the inner ring nut 3, preventing it from falling out of the outer ring nut 2. The sliding block 4's outer wall also slides against the inner wall of the outer ring nut 2, guiding the inner ring nut 3 into accurate installation and preventing it from failing to rotate when the outer ring nut 2 is turned. To address the issue of movement, the outer ring nut 2 has a sliding groove 6 inside, and a locking block 7 is slidably connected to the inner wall of the outer ring nut 2. The locking block 7 is used to engage with the locking groove 5, achieving the effect of replacing the inner ring nut 3, avoiding the need to replace the entire nut during replacement, and reducing maintenance costs. A pull rod 8 is fixedly connected to the outer wall of the locking block 7, and the outer wall of the pull rod 8 is slidably connected to the inner wall of the sliding groove 6. A limit block 9 is fixedly connected to one end of the locking block 7, which is used to limit the sliding range of the locking block 7, achieving the effect of preventing the locking block 7 from falling off the inner wall of the outer ring nut 2. A spring 10 is set inside the outer ring nut 2. One end of the spring 10 is fixedly connected to the inner wall of the outer ring nut 2, and the other end of the spring 10 is fixedly connected to the outer wall of the limit block 9. The spring 10, together with the locking block 7, provides elastic force to push the locking block 7 into the locking groove 5, achieving the effect of automatically locking the inner ring nut 3.
[0035] Reference Figures 4-6The anti-theft component includes a lower anti-theft shell 11, the inner wall of which is fitted onto the outer wall of the outer ring nut 2. An upper anti-theft shell 12 is slidably connected to the inner wall of the lower anti-theft shell 11, and its inner wall is fitted onto the outer wall of the outer ring nut 2. The upper anti-theft shell 12 cooperates with the lower anti-theft shell 11 in opening and closing motion. When closed, it forms complete protection, blocking the hexagonal operating surface of the outer ring nut 2, preventing ordinary wrenches, pipe wrenches, and other tools from directly engaging and tightening the outer ring nut 2. When opened, it facilitates operation of the internal structure, achieving a balance between anti-theft and maintenance. The upper anti-theft shell 12 has a fixing hole 13 inside, which is used to cooperate with the locking post 14 to fix the upper anti-theft shell 12 and the lower anti-theft shell 11. When the locking post 14 is inserted into the fixing hole 13, the upper anti-theft shell 12 and the lower anti-theft shell 11 can be locked, thus preventing the upper anti-theft shell 12 from being opened at will. The locking post 14 is slidably connected to the inner wall of the lower anti-theft shell 11, and the outer wall of the locking post 14 is slidably connected to the inner wall of the fixing hole 13. The locking post 14 cooperates with the fixing hole 13 to perform insertion and removal movements. When inserted, it fixes the upper anti-theft shell 12. The lower anti-theft shell 11 can open the upper anti-theft shell 12 when pulled out, thus controlling the opening and closing of the anti-theft shell. A limit ring 15 is fixedly connected to the outer wall of the locking post 14. The limit ring 15 is used to limit the sliding distance of the locking post 14, thereby preventing the locking post 14 from falling off the inner wall of the lower anti-theft shell 11. The outer wall of the limit ring 15 is slidably connected to the inner wall of the lower anti-theft shell 11. A second spring 16 is sleeved on the outer wall of the locking post 14. One end of the second spring 16 is fixedly connected to the inner wall of the lower anti-theft shell 11, and the other end of the second spring 16 is fixedly connected to the outer wall of the limit ring 15. Spring 16 provides elastic thrust to the locking post 14, ensuring that the locking post 14 always tends to insert into the fixing hole 13, thus increasing the stability of the anti-theft shell closure. A handle 17 is fixedly connected to the outer wall of the locking post 14, and a threaded nail 18 is threadedly connected to the inner wall of the lower anti-theft shell 11. The threaded nail 18 is threaded to the inner wall of the locking post 14 and is used to lock the position of the locking post 14. The locking post 14 is locked without using a specific tool to unscrew the threaded nail 18, thus achieving the anti-theft effect of the nut.
[0036] Working principle: When disassembling and replacing the inner ring nut 3, first pull the pull rod 8. The pull rod 8 slides on the inner wall of the sliding groove 6. Then, pulling the pull rod 8 drives the locking block 7 to slide on the inner wall of the outer ring nut 2. Next, the movement of the locking block 7 drives the limit block 9 to move. Then, the movement of the limit block 9 compresses the spring 10. Finally, the locking block 7 moves out of the slot 5 to complete the disassembly of the inner ring nut 3. When replacing and installing the inner ring nut 3, first insert the sliding block 4 into the inner wall of the outer ring nut 2. Then, after installation, release the pull rod 8. Then, the spring 10 rebounds and drives the limit block 9 to reset. Then, the reset of the limit block 9 drives the locking block 7 to move into the slot 5 to complete the installation of the inner ring nut 3. This avoids problems such as wear, stripping, deformation, and corrosion of the nut's thread ring, which can cause the nut and bolt to not mesh tightly, leading to loose connection, uneven force, or even detachment.
[0037] When using the outer ring nut 2 for anti-theft purposes, first, the lower anti-theft shell 11 is fitted onto the outer wall of the threaded rod 1, followed by the installation of the outer ring nut 2. Then, after the outer ring nut 2 is installed, the upper anti-theft shell 12 is fitted onto the outer wall of the threaded rod 1. Next, the handle 17 is pulled. Pulling the handle 17 causes the locking pin 14 to move against the inner wall of the lower anti-theft shell 11. The movement of the locking pin 14 then causes the limiting ring 15 to move against the inner wall of the lower anti-theft shell 11. The movement of the limiting ring 15 then compresses the second spring 16. Finally, the outer wall of the upper anti-theft shell 12 slides against the inner wall of the lower anti-theft shell 11. After installation, release handle 17. The spring 16 returns to its original position, causing limit ring 15 to reset. Then, the reset of limit ring 15 moves locking post 14 into the fixing hole 13. Next, install threaded nail 18. Use a special tool to turn threaded nail 18 on the inner wall of the lower anti-theft shell 11. Continue turning until threaded nail 18 rotates on the inner wall of locking post 14, thus completing the installation of threaded nail 18. This prevents ordinary nuts from being easily disassembled by wrenches and other general tools for outdoor facilities, public equipment, or industrial parts, which could lead to theft of parts and direct economic losses.
Claims
1. A replaceable anti-theft nut, comprising an outer ring nut (2), characterized in that: The outer ring nut (2) is provided with an anti-theft component on its outer wall, and a threaded rod (1) is threadedly connected to the inner wall of the outer ring nut (2). The inner wall of the outer ring nut (2) is provided with a replacement component. The replacement component includes an inner ring nut (3), the outer wall of which is slidably connected to the inner wall of the outer ring nut (2), a sliding block (4) is fixedly connected to the outer wall of the inner ring nut (3), a slot (5) is provided inside the sliding block (4), the outer wall of which is slidably connected to the inner wall of the outer ring nut (2), a sliding groove (6) is provided inside the outer ring nut (2), a locking block (7) is slidably connected to the inner wall of the outer ring nut (2), a pull rod (8) is fixedly connected to the outer wall of the locking block (7), the outer wall of the pull rod (8) is slidably connected to the inner wall of the sliding groove (6), a limit block (9) is fixedly connected to one end of the locking block (7), a spring (10) is provided inside the outer ring nut (2), one end of the spring (10) is fixedly connected to the inner wall of the outer ring nut (2), and the other end of the spring (10) is fixedly connected to the outer wall of the limit block (9).
2. The replaceable anti-theft nut according to claim 1, characterized in that: The anti-theft assembly includes a lower anti-theft shell (11), the inner wall of which is sleeved on the outer wall of the outer ring nut (2), and an upper anti-theft shell (12) is slidably connected to the inner wall of the lower anti-theft shell (11).
3. A replaceable anti-theft nut according to claim 2, characterized in that: The inner wall of the upper anti-theft shell (12) is fitted onto the outer wall of the outer ring nut (2), and a fixing hole (13) is provided inside the upper anti-theft shell (12).
4. A replaceable anti-theft nut according to claim 3, characterized in that: The lower anti-theft shell (11) has a slidably connected locking post (14) on its inner wall, and the outer wall of the locking post (14) is slidably connected to the inner wall of the fixing hole (13).
5. A replaceable anti-theft nut according to claim 4, characterized in that: The outer wall of the locking post (14) is fixedly connected to a limiting ring (15), and the outer wall of the limiting ring (15) is slidably connected to the inner wall of the lower anti-theft shell (11).
6. A replaceable anti-theft nut according to claim 5, characterized in that: A second spring (16) is fitted on the outer wall of the locking post (14). One end of the second spring (16) is fixedly connected to the inner wall of the lower anti-theft shell (11), and the other end of the second spring (16) is fixedly connected to the outer wall of the limiting ring (15).
7. A replaceable anti-theft nut according to claim 6, characterized in that: A handle (17) is fixedly connected to the outer wall of the locking post (14), and a threaded nail (18) is threadedly connected to the inner wall of the lower anti-theft shell (11). The outer wall of the threaded nail (18) is threadedly connected to the inner wall of the locking post (14).