Anti-loose sealing nut device
By designing an anti-loosening sealing nut device, the problem of nut loosening and wear under complex working conditions is solved by using multi-level sealing barriers and quick-disassembly components, thereby achieving the reliability and safety of bolted connections and reducing equipment failure and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI SANFENG RUBBER PROD CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-19
AI Technical Summary
Existing nuts are prone to reduced sealing performance due to wear or aging of the annular washer during long-term use, making them unable to effectively resist the risk of loosening under complex working conditions and posing a risk of detachment.
A locking and sealing nut device is designed. Through a multi-stage sealing barrier structure of bolt and nut assembly, including joint and disassembly components, it utilizes components such as springs and magnetic blocks to increase friction and sealing, forming a closed space to prevent metal corrosion and rubber aging, and providing a quick disassembly function.
It effectively resists the risk of loosening under vibration and impact, extends the maintenance cycle, reduces equipment failure and labor costs, improves gas and liquid barrier capabilities, and ensures safe and reliable operation of equipment.
Smart Images

Figure CN224380351U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nut technology, and specifically to an anti-loosening sealing nut device. Background Technology
[0002] In the field of mechanical engineering, bolted connections are one of the most commonly used fixing methods, and their reliability directly affects the operational safety and service life of equipment.
[0003] According to the public announcement (CN217029588U), a high-sealing anti-loosening nut is disclosed. This technology discloses a technical solution that includes "a hexagonal nut body, a hexagonal block at the upper end of the hexagonal nut body, a through hole at the middle of the surface of the hexagonal block, an annular washer fixedly disposed at the upper end of the hexagonal block, anti-slip grooves at intervals on the surface of the annular washer, an assembly rod fixedly connected at intervals to the bottom surface of the hexagonal block, an assembly iron block fixedly disposed on the bottom surface of the assembly rod, and positioning grooves at intervals on the surface of the hexagonal nut body corresponding to the position of the assembly rod, with the assembly rod and positioning grooves being adapted to each other. This solution has good anti-loosening performance, and the annular washer can improve the sealing between the nut and the bolt, prevent easily penetrating impurities from causing corrosion. Furthermore, the annular washer can be disassembled and installed on the hexagonal nut body, facilitating the replacement of damaged annular washers."
[0004] However, in the aforementioned comparative documents, when installing nuts, the main method of preventing loosening and sealing is to use annular washers. However, in actual use, since the annular washers are made of rubber, they are subject to various external factors during long-term use, which can lead to wear and breakage, thus affecting the use of nuts. At the same time, using only annular washers results in a structure that is too simple and cannot effectively resist the risk of loosening under complex working conditions, which may lead to the risk of detachment during use.
[0005] To address the aforementioned problems, this application proposes an anti-loosening sealing nut device. Utility Model Content
[0006] This utility model addresses the technical problems existing in the prior art by providing a device for preventing loosening of sealing nuts.
[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A non-loosening sealing nut device includes a bolt, on which a nut assembly is provided; on which a connecting assembly is provided, and on which a disassembly assembly is provided; the nut assembly includes a main nut threaded to the outer wall of the bolt, a first rotating ring rotatably connected to the main nut, a secondary nut threaded to the outer wall of the bolt, a second rotating ring rotatably connected to the secondary nut, a first spring fixedly connected to the second rotating ring, one end of the first spring being fixedly connected to the first rotating ring, a sealing gasket provided on the side of the main nut away from the first rotating ring, a first groove formed on the outer wall of the main nut, and a second groove formed on the outer wall of the secondary nut.
[0008] The combined assembly includes a protective shell with a circular tube fixedly connected to it. A circular plate is fixedly connected to the inner wall of the circular tube, and a second spring is fixedly connected to one side of the circular plate. A fixing rod is fixedly connected to one end of the second spring near the main nut. The outer wall of the fixing rod fits into the first groove of the bolt. By setting up the combined assembly, the connection part of the bolt and nut assembly is sealed, thereby forming a relatively closed space at the connection of the bolt and nut assembly. This prevents external media from directly contacting the threaded connection, thus preventing metal corrosion or aging of rubber seals. At the same time, it forms a multi-level sealing barrier, improving the barrier capability against gases and liquids.
[0009] The disassembly assembly includes a baffle fixedly connected to the outer wall of the protective shell, a sliding ring slidably connected to the outer wall of the protective shell, a rope provided on the inner wall of the sliding ring, one end of the rope being fixedly connected to one end of the fixing rod located inside the circular tube. By setting up the disassembly assembly, the combined assembly can be quickly disassembled, thereby facilitating workers to remove the nut assembly from the bolt.
[0010] A connecting plate is fixedly connected to the outer wall of the sliding ring. The outer wall of the connecting plate is provided with protective stripes. By setting the connecting plate, the operator can quickly slide the two sliding rings, thereby facilitating the disassembly of the nut assembly.
[0011] A magnetic block is fixedly connected to one end of the protective shell of the main nut. The inner wall of the magnetic block fits against the outer wall of the main nut. By setting the magnetic block, the main nut is further fixed, thereby preventing the main nut from rotating and coming off.
[0012] The main nut has a slot, and the sealing gasket has a fixed rod connected to it. The outer wall of the rod fits into the slot in the main nut. By setting the slot and the rod, the sealing gasket can be replaced. When the sealing gasket is damaged, it can be disassembled through the slot and the rod, thus facilitating the replacement of the sealing gasket.
[0013] The inner wall of the sliding ring is fixedly connected with a protective groove. The sliding ring is fixedly connected to one end of the rope through the protective groove. By setting the protective groove, the rope is protected and is prevented from being damaged by the compression of the sliding ring when it is pulled.
[0014] The beneficial effects of this utility model are:
[0015] By setting up a nut assembly, the friction between the nut and the bolt is increased, effectively resisting the risk of loosening under working conditions such as vibration, impact, and alternating loads. This avoids equipment failure, safety hazards, or accidents caused by nut loosening, and can also significantly extend the maintenance cycle, thereby significantly reducing labor costs and downtime.
[0016] By setting up a combined component, the connection between the bolt and nut assembly is sealed, thereby forming a relatively enclosed space at the connection point. This prevents external media from directly contacting the threaded connection, thus avoiding metal corrosion or aging of rubber seals. At the same time, it forms a multi-level sealing barrier, improving the barrier capability against gases and liquids. Attached Figure Description
[0017] Figure 1 This is a schematic diagram illustrating the overall structure of this utility model;
[0018] Figure 2 This utility model is illustrated by a schematic diagram showing the structure of the main nut and its related parts.
[0019] Figure 3 This utility model is a schematic diagram illustrating the structure of a circular tube and its related parts;
[0020] Figure 4 This is a schematic diagram of the structure of the display baffle and its related parts in this utility model;
[0021] Figure 5 This utility model is a schematic diagram illustrating the structure of the fixing rod and its related parts.
[0022] The attached diagram lists the components represented by each number as follows:
[0023] 1. Bolts;
[0024] 2. Nut assembly; 201. Main nut; 202. Secondary nut; 203. First rotating ring; 204. Second rotating ring; 205. First spring; 206. Sealing gasket; 207. First groove; 208. Second groove;
[0025] 3. Combined components; 301. Round tube; 302. Round plate; 303. Second spring; 304. Fixing rod; 305. Protective shell;
[0026] 4. Disassembly of components; 401. Baffle; 402. Sliding ring; 403. Rope;
[0027] 5. Connecting plate; 6. Magnetic block; 7. Slot; 8. Insert rod; 9. Protective groove. Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0030] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.
[0031] Reference Figure 1-5A locking and sealing nut device includes a bolt 1, a nut assembly 2 on the bolt 1, a connecting assembly 3 on the bolt 1 for sealing the connection between the bolt 1 and the nut assembly 2, and a disassembly assembly 4 on the bolt 1. The disassembly assembly 4 allows workers to quickly remove the nut assembly 2 from the bolt 1. The nut assembly 2 includes a main nut 201 threaded to the outer wall of the bolt 1, which secures the bolt 1. A first rotating ring 203 is rotatably connected to the main nut 201. A secondary nut 202 is threaded to the outer wall of the bolt 1, which also secures the bolt 1. A first rotating ring 203 is rotatably connected to the main nut 201. A second rotating ring 204 is connected, and a first spring 205 is fixedly connected to the second rotating ring 204. The second rotating ring 204 can connect the first spring 205 to the secondary nut 202. One end of the first spring 205 is fixedly connected to the first rotating ring 203. The first rotating ring 203 can connect the first spring 205 to the main nut 201. A sealing gasket 206 is provided on the side of the main nut 201 away from the first rotating ring 203. The sealing gasket 206 is used for sealing. A first groove 207 is provided on the outer wall of the main nut 201. There are three first grooves 207. A second groove 208 is provided on the outer wall of the secondary nut 202. There are three second grooves 208.
[0032] Reference Figure 2 and Figure 5 The combined component 3 includes a protective shell 305, which has two sections that are rotatably connected. A circular tube 301 is fixedly connected to the protective shell 305. A circular plate 302 is fixedly connected to the inner wall of the circular tube 301. The circular tube 301 is used to fix the circular plate 302. A second spring 303 is fixedly connected to one side of the circular plate 302. The circular plate 302 is used to fix the second spring 303. A fixing rod 304 is fixedly connected to one end of the second spring 303 near the main nut 201. The second spring 303 is used to push and extend the fixing rod 304. The outer wall of the fixing rod 304 fits into the first groove 207 of the bolt 1. The fixing rod 304 can be inserted into the slot 7 and the second groove 208 of the nut assembly 2, thereby fixing the protective shell 305 to the main nut 201 and the secondary nut 202.
[0033] Reference Figure 1 , Figure 4 and Figure 5The disassembly assembly 4 includes a baffle 401 fixedly connected to the outer wall of the protective shell 305. A magnet is provided on the baffle 401. A sliding ring 402 is slidably connected to the outer wall of the protective shell 305. The baffle 401 can block the sliding ring 402, and the magnet on the baffle 401 can fix the sliding ring 402. A rope 403 is provided on the inner wall of the sliding ring 402. There are three ropes 403. One end of the rope 403 is fixedly connected to the end of the fixing rod 304 located inside the round tube 301. The sliding ring 402 can pull the three ropes 403 at the same time, so as to facilitate the workers to remove the nut assembly 2 from the bolt 1.
[0034] Reference Figure 1 and Figure 4 A connecting plate 5 is fixedly connected to the outer wall of the sliding ring 402. The connecting plate 5 can unite the two sliding rings 402 together, so that the staff can move the two sliding rings 402 at the same time. The outer wall of the connecting plate 5 is provided with anti-slip stripes, which can facilitate the staff to move the protective groove 9.
[0035] Reference Figure 2 and Figure 3 The protective shell 305 is fixedly connected to a magnetic block 6 at one end of the main nut 201. The outer circumference of the magnetic block 6 is circular and the inner circumference is hexagonal. The inner wall of the magnetic block 6 fits against the outer wall of the main nut 201. The magnetic block 6 can further fix the main nut 201, thereby preventing the main nut 201 from rotating and disengaging from the motor.
[0036] Reference Figure 2 The main nut 201 has six slots 7. The sealing gasket 206 is fixedly connected to six insert rods 8. The outer wall of the insert rods 8 fits into the slots 7 of the main nut 201. The use of the slots 7 and insert rods 8 allows the sealing gasket 206 to be replaced and installed.
[0037] Reference Figure 4 and Figure 5 The inner wall of the sliding ring 402 is fixedly connected with a protective groove 9. Each sliding ring 402 has three protective grooves 9. The sliding ring 402 is fixedly connected to one end of the rope 403 through the protective grooves 9. The protective grooves 9 can prevent the rope 403 from being squeezed and worn when the sliding ring 402 is pulled.
[0038] Working principle:
[0039] This anti-loosening sealing nut device allows the main nut 201 to be threaded onto bolt 1 when it is necessary to connect the nut to bolt 1. After the main nut 201 is connected, the auxiliary nut 202 is threaded onto bolt 1. After the threaded connection, the first spring 205 will be in a compressed state. When the first spring 205 is compressed, it will generate an opposite force to push the main nut 201 and auxiliary nut 202. At this time, the friction between the auxiliary nut 202, the main nut 201 and bolt 1 will increase, which can facilitate the nut to loosen. After the nut assembly 2 is installed, the protective shell 305 can be installed on the main nut 201, and the fixing rod 304 can be inserted into the first groove 207 and the second groove 208, thereby connecting the two main nuts 201 and the second groove 208 together and preventing loosening and falling off.
[0040] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0041] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A lock nut anti-loosening device comprising a bolt (1), characterized in that, The bolt (1) is provided with a nut assembly (2); the bolt (1) is provided with a connecting assembly (3); and the bolt (1) is provided with a disassembly assembly (4). The nut assembly (2) includes a main nut (201) threaded to the outer wall of a bolt (1), a first rotating ring (203) rotatably connected to the main nut (201), a secondary nut (202) threaded to the outer wall of the bolt (1), a second rotating ring (204) rotatably connected to the secondary nut (202), a first spring (205) fixedly connected to the second rotating ring (204), one end of the first spring (205) fixedly connected to the first rotating ring (203), a sealing gasket (206) provided on the side of the main nut (201) away from the first rotating ring (203), a first groove (207) provided on the outer wall of the main nut (201), and a second groove (208) provided on the outer wall of the secondary nut (202).
2. The anti-loosening sealing nut device according to claim 1, characterized in that, The combined assembly (3) includes a protective shell (305), on which a round tube (301) is fixedly connected. A round plate (302) is fixedly connected to the inner wall of the round tube (301). A second spring (303) is fixedly connected to one side of the round plate (302). A fixing rod (304) is fixedly connected to one end of the second spring (303) near the main nut (201). The outer wall of the fixing rod (304) fits against the first groove (207) opened by the bolt (1).
3. The anti-loosening sealing nut device according to claim 2, characterized in that, The disassembly assembly (4) includes a baffle (401) fixedly connected to the outer wall of the protective shell (305), a sliding ring (402) slidably connected to the outer wall of the protective shell (305), a rope (403) provided on the inner wall of the sliding ring (402), and one end of the rope (403) fixedly connected to one end of the fixing rod (304) located inside the round tube (301).
4. The anti-loosening sealing nut device according to claim 3, characterized in that, The outer wall of the sliding ring (402) is fixedly connected to a connecting plate (5), and the outer wall of the connecting plate (5) is provided with protective stripes.
5. The anti-loosening sealing nut device according to claim 2, characterized in that, The protective shell (305) is fixedly connected to a magnetic block (6) at one end of the main nut (201), and the inner wall of the magnetic block (6) is in contact with the outer wall of the main nut (201).
6. The anti-loosening sealing nut device according to claim 1, characterized in that, The main nut (201) has a slot (7) and the sealing gasket (206) has a fixed rod (8) connected to it. The outer wall of the rod (8) fits into the slot (7) of the main nut (201).
7. The anti-loosening sealing nut device according to claim 3, characterized in that, The inner wall of the sliding ring (402) is fixedly connected with a protective groove (9), and the sliding ring (402) is fixedly connected to one end of the rope (403) through the protective groove (9).