Detachable nut
By designing a detachable nut split structure, and adopting the sliding fit of the connecting groove and connecting block as well as the dovetail groove structure, the problem of difficult installation and disassembly of traditional nuts in space-constrained scenarios is solved, improving the flexibility and safety of use in special working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JINGYANG FASTENER MAKING CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional one-piece nuts are difficult to install and remove in situations where space is limited or frequent disassembly and assembly are required, increasing maintenance difficulty and the risk of damaging other components.
The nuts are designed to be installed in pairs and are separate, using a sliding fit of connecting grooves and connecting blocks. They are combined with dovetail groove and dovetail protrusion structures, and the stability is enhanced by fixing holes and fixing rods. The internal threads are continuously arranged to form a complete threaded through hole. The outer surface is provided with an anti-corrosion coating and a fixing sleeve to improve connection stability and ease of operation.
It enables partial installation and disassembly in narrow gaps or enclosed cavities, reducing maintenance difficulty, improving usage flexibility and ease of operation, and extending service life.
Smart Images

Figure CN224214540U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mechanical connection technology, and in particular to a detachable nut. Background Technology
[0002] In the field of mechanical connections, nuts, as important fastening components, are widely used in various mechanical equipment, building structures, and industrial production. With the continuous development of industrial technology, the demand for nuts has become increasingly diversified and complex. Their quality and performance directly affect the stability and reliability of the entire connection structure, playing a crucial role in ensuring the normal operation of mechanical equipment and the stability of the structure.
[0003] Traditional nuts are typically one-piece designs. During installation, the bolt must be fully inserted through the connected components before tightening. In space-constrained situations, such as narrow gaps or enclosed cavities, the inability to fully insert the bolt makes installation extremely difficult or even impossible. Furthermore, when equipment requires repair or parts replacement, removing a one-piece nut often necessitates disassembling surrounding components, increasing the difficulty and workload of repairs and potentially damaging other parts due to improper handling.
[0004] Existing one-piece nuts have significant shortcomings when dealing with work conditions where space is limited or frequent disassembly and assembly are required. They cannot achieve partial installation and disassembly, and installation and disassembly operations can only be completed when the bolt can pass through as a whole, which seriously limits their flexibility of use in special working conditions. Utility Model Content
[0005] To address the problems with nuts in the prior art, this application provides a detachable nut.
[0006] This application provides a detachable nut, which adopts the following technical solution:
[0007] A detachable nut includes a pair of nut parts, each nut part having a connecting groove and a connecting block at both ends. The connecting block of each nut part is in sliding engagement with the connecting groove of the opposite nut part. The length direction of the connecting groove and the sliding direction of the connecting block are both parallel to the rotation axis of the nut.
[0008] By adopting the above technical solution, the nut can be installed and disassembled separately, which solves the problem that traditional one-piece nuts are difficult to install and disassemble in space-constrained scenarios. It improves the flexibility of the nut in special working conditions, avoids the trouble of removing other surrounding parts during maintenance, reduces maintenance difficulty and workload, and reduces the risk of damaging other parts.
[0009] Preferably, the connecting groove is a dovetail groove, and the connecting block is a dovetail protrusion that matches the dovetail groove.
[0010] By adopting the above technical solution, the connecting groove adopts a dovetail groove and the connecting block adopts a matching dovetail protrusion, which further enhances the stability of the connection between the two nuts and prevents them from accidentally separating during use.
[0011] Preferably, a fixing hole is provided in the middle of both the connecting groove and the connecting block, and a fixing rod is inserted into each of the two fixing holes.
[0012] By adopting the above technical solution, a fixing hole is set in the middle of the connecting groove and the connecting block and a fixing rod is inserted to prevent the connecting block from sliding in the connecting groove, so that the pair of nuts can be connected more stably.
[0013] Preferably, the inner surface of the nut split body is provided with internal threads, and the internal threads of the two threaded split bodies are continuously arranged to form a complete threaded through hole.
[0014] By adopting the above technical solution, the detachable nut includes a pair of nut parts that slide together through a connecting groove and a connecting block. This structure allows the nut to be disassembled, enabling partial installation and disassembly in space-constrained locations. The inner surface of the nut part has internal threads that are continuously arranged to form a complete threaded through hole, ensuring that the detachable nut can be used with a bolt like a traditional nut to achieve a fastening function, thus improving the flexibility of the nut in special working conditions.
[0015] Preferably, the outer surface of the nut assembly is provided with an anti-corrosion coating.
[0016] By adopting the above technical solution, the outer surface of the nut body is provided with an anti-corrosion coating, which can prevent the nut from being corroded and extend the service life of the nut.
[0017] Preferably, both nuts are fitted with fixing sleeves on their outer sides.
[0018] By adopting the above technical solution, a fixing sleeve is fitted on the outer side of the two separate nuts, which further strengthens the connection stability between the two separate nuts and improves the overall robustness of the detachable nut structure.
[0019] Preferably, the two nuts are separately formed into hexagonal nuts.
[0020] By adopting the above technical solution, the nut is split into hexagonal nuts, which conform to the operation interface standards of common tools, making it easy to tighten and loosen using conventional tools and improving the convenience of operation.
[0021] Preferably, the outer surface of the nut body is provided with anti-slip grooves.
[0022] By adopting the above technical solution, anti-slip grooves are set on the outer surface of the nut body, which increases the friction between the nut and the tool, making it easier for the tool to apply force to tighten or loosen the nut.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. The detachable nut design allows for partial installation and disassembly, solving the problem of not being able to fully insert the bolt for installation in situations with limited space, and improving the convenience of installation in special spaces such as narrow gaps or enclosed cavities;
[0025] 2. When repairing or replacing parts, it is not necessary to disassemble other surrounding components first, which reduces the difficulty and workload of repair and reduces the risk of damaging other parts due to improper operation;
[0026] 3. Improved the flexibility of nut use in space-constrained or frequently disassembled conditions, eliminating the limitation that the entire bolt must pass through for installation and removal. Attached Figure Description
[0027] Figure 1 This is an isometric schematic diagram of the main overall structure in the embodiments of this application;
[0028] Figure 2 This is a schematic diagram of the nut assembly in an embodiment of this application.
[0029] Reference numerals: 1. Nut (split); 2. Connecting groove; 3. Connecting block; 4. Fixing hole; 5. Fixing rod; 6. Internal thread; 7. Fixing sleeve; 8. Anti-slip groove. Detailed Implementation
[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 This application will be described in further detail.
[0031] This application discloses a detachable nut.
[0032] Reference Figure 1 and Figure 2 A detachable nut includes a pair of nut parts 1, wherein each nut part 1 has a connecting groove 2 and a connecting block 3 at both ends. The connecting block 3 of each nut part 1 forms a sliding fit with the connecting groove 2 of the opposite nut part 1. The length direction of the connecting groove 2 and the sliding direction of the connecting block 3 are both parallel to the rotation axis of the nut, achieving the effect of partial installation and disassembly of the nut. It allows the two nut parts 1 to be easily assembled and disassembled without having to pass the bolt through as a whole as with traditional one-piece nuts.
[0033] Reference Figure 1 and Figure 2The connecting groove 2 can be a dovetail groove, which is trapezoidal in shape with a narrow opening and a wide bottom. This special shape prevents the connecting block 3 from coming out of the groove. The connecting block 3 is a dovetail protrusion that matches the dovetail groove. The shape of the dovetail protrusion is complementary to that of the dovetail groove and is also a trapezoidal structure. The dovetail protrusion and the dovetail groove fit together through a bevel, which ensures good stability and accuracy during sliding and prevents shaking or misalignment during assembly.
[0034] Reference Figure 1 and Figure 2 Both the connecting groove 2 and the connecting block 3 have a fixing hole 4 in the middle. The fixing hole 4 is a circular through hole that passes through the connecting groove 2 and the connecting block 3. A fixing rod 5 is installed inside the fixing hole 4. The fixing rod 5 is a cylindrical rod, usually made of high-strength alloy steel, which can withstand greater tensile and compressive forces. The fixing rod 5 is inserted into the two fixing holes 4 to further fix the connecting block 3 and the connecting groove 2, preventing relative slippage between the nut parts 1 during use and enhancing the overall stability of the nut.
[0035] Reference Figure 1 and Figure 2 The inner surface of the nut body 1 is provided with internal thread 6. The internal threads 6 of the two threaded bodies are arranged continuously to form a complete threaded through hole. In this way, after the nut is assembled, it can perfectly match the external thread of the bolt to achieve the fastening function.
[0036] Reference Figure 1 and Figure 2 The outer surface of the nut body 1 is coated with an anti-corrosion coating. This coating is a material with anti-corrosion properties and can be applied to the outer surface of the nut body 1 by spraying, electroplating, or other methods. Common materials include epoxy zinc-rich primer and polyurethane topcoat. This coating effectively isolates the nut body 1 from corrosive substances such as moisture and oxygen in the external environment, extending the service life of the nut.
[0037] Reference Figure 1 and Figure 2 Each of the two nut segments 1 is fitted with a fixing sleeve 7 on its outer side. The fixing sleeve 7 has a ring structure, and its inner diameter is adapted to the outer diameter of the nut segment 1. The fixing sleeve 7 serves to further fix and protect the nut segment 1, preventing the nut segment 1 from accidentally separating during use. It can also buffer external impact forces and reduce the wear of the nuts.
[0038] Reference Figure 1 and Figure 2 The two nuts are separated into hexagonal nuts, which facilitates tightening and loosening operations using tools such as wrenches. Their size is selected according to the actual application scenario.
[0039] Reference Figure 1 and Figure 2The outer surface of the nut body 1 is provided with anti-slip grooves 8. The anti-slip grooves 8 are grooves machined into the outer surface of the nut body 1, and their shape can be straight, wavy, etc. The material is the same as that of the main body of the nut body 1. These grooves can increase the friction between the nut and the tool or hand, prevent slippage when tightening or loosening the nut, and improve the safety and convenience of operation.
[0040] The implementation principle of this application embodiment is as follows: the detachable nut, through the sliding engagement of the connecting groove 2 and the connecting block 3, enables partial installation and disassembly in space-constrained scenarios, avoiding the limitations of traditional one-piece nuts. The connecting groove 2 and the connecting block 3 employ a dovetail groove and dovetail protrusion structure, further secured by the fixing rod 5, ensuring the stability of the nut after assembly. The internal thread 6 design allows for good engagement with bolts to achieve a tightening function, the anti-corrosion coating extends the nut's service life, and the fixing sleeve 7 and anti-slip groove 8 respectively improve the nut's reliability and ease of operation. Overall, this detachable nut solves the problem of inconvenience in using traditional one-piece nuts under special working conditions, improves flexibility and efficiency, and makes an improvement and contribution to the field of mechanical connections.
[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A detachable nut, characterized in that: The nut assembly includes a pair of nut parts (1), each of which has a connecting groove (2) and a connecting block (3) at both ends. The connecting block (3) of each nut part (1) is in sliding fit with the connecting groove (2) of the opposite nut part (1). The length direction of the connecting groove (2) and the sliding direction of the connecting block (3) are both parallel to the rotation axis of the nut.
2. A detachable nut according to claim 1, characterized in that: The connecting groove (2) is a dovetail groove, and the connecting block (3) is a dovetail protrusion that matches the dovetail groove.
3. A detachable nut according to claim 2, characterized in that: The middle part of the connecting groove (2) and the connecting block (3) is provided with a fixing hole (4), and a fixing rod (5) is inserted into each of the two fixing holes (4).
4. A detachable nut according to claim 1, characterized in that: The inner surface of the nut body (1) is provided with an internal thread (6), and the internal threads (6) of the two threaded bodies are arranged continuously to form a complete threaded through hole.
5. A detachable nut according to claim 1, characterized in that: The outer surface of the nut body (1) is provided with an anti-corrosion coating.
6. A detachable nut according to claim 1, characterized in that: Both of the nut parts (1) are fitted with a fixing sleeve (7) on their outer sides.
7. A detachable nut according to claim 1, characterized in that: The two nuts are separated (1) and formed into a hexagonal nut.
8. A detachable nut according to claim 1, characterized in that: The outer surface of the nut body (1) is provided with anti-slip grooves (8).