Double-thread lock bolt

Abstract

The utility model belongs to the field of fasteners, and particularly relates to a double-thread lock bolt which comprises a double-thread bolt and a nut assembly in threaded connection with the double-thread bolt. An anti-loosening assembly matched with the first nut is arranged on the second nut and comprises a plurality of first movable grooves evenly distributed along the center of the second nut, the first movable grooves penetrate through the second nut, limiting pins are movably arranged in the first movable grooves, and the top ends of the limiting pins are connected through a mounting ring. A plurality of limiting holes allowing the limiting pins to be inserted therein are evenly distributed in the top face of the first nut. And the mounting ring is connected with the second nut through a locking assembly. According to the utility model, through the arrangement of the anti-loosening assembly, the limiting pin in the anti-loosening assembly can be inserted into the limiting hole of the first nut to realize the connection of the first nut and the second nut, and the limiting pin is limited on the first nut through the locking assembly, so that the first nut and the second nut are mutually limited; therefore, the anti-loosening effect on the double-thread bolt is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of fasteners, and in particular relates to a double-threaded anti-loosening bolt. Background Technology

[0002] Fasteners, as key components for connecting and securing parts, directly affect the safety, reliability, and stability of the entire equipment or structure. Among them, bolts, as one of the most widely used fasteners, have always had a focus on their anti-loosening performance. In complex and variable working conditions, such as vibration, impact, and temperature changes, loosening of bolt connections can lead to decreased equipment performance and abnormal noise. Double-threaded bolts are a type of fastener that, through the interaction between the two nuts, increase the friction and self-locking ability of the bolt connection, thus more effectively resisting loosening under external forces such as vibration and impact, improving the reliability of the connection. However, the upper nut does not have a position-limiting function and can still loosen, leading to nut falling off or rotating. Utility Model Content

[0003] The purpose of this utility model is to provide a double-threaded anti-loosening bolt to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the specific technical solution of this utility model for a double-threaded anti-loosening bolt is as follows:

[0005] A double-threaded anti-loosening bolt includes a double-threaded bolt and a nut assembly threadedly connected to the double-threaded bolt. The nut assembly includes a first nut and a second nut threadedly connected to the double-threaded bolt, with the second nut positioned above and abutting against the first nut. An anti-loosening component is provided on the second nut to mate with the first nut, and the anti-loosening component includes a plurality of first movable grooves evenly distributed along the center of the second nut, penetrating the second nut. A limiting pin is movably disposed within each of the first movable groove, and the top of each limiting pin is connected by a mounting ring. A plurality of limiting holes for the insertion of the limiting pins are evenly distributed on the top surface of the first nut. The mounting ring is connected to the second nut by a locking assembly.

[0006] Furthermore, the locking assembly includes an arc-shaped groove on the top surface of the second nut, and the lower middle part of the mounting ring is movably disposed in the arc-shaped groove. A toothed ring is provided on the inner wall of the arc-shaped groove, and multiple internal teeth are distributed on the circumference of the lower middle part of the mounting ring. The internal teeth can mesh with the toothed ring.

[0007] Furthermore, the second nut has a recessed second movable groove on the bottom surface of the first movable groove, and an action plate is slidably provided on the limit pin. The action plate is slidably provided in the second movable groove, and a tension spring is provided between the action plate and the mounting ring, with the tension spring sleeved on the limit pin.

[0008] Furthermore, the mounting ring is provided with a connecting ring, and the outer diameter of the connecting ring is larger than the outer diameter of the mounting ring.

[0009] Furthermore, the diameter of the limiting pin is the same as the diameter of the limiting hole.

[0010] The double-threaded anti-loosening bolt of this utility model has the following advantages:

[0011] This utility model, by setting an anti-loosening component, allows the limiting pin of the anti-loosening component to move along the first movable groove and insert into the limiting hole of the first nut when the second nut abuts against the first nut, thereby connecting the first nut and the second nut. The locking component then limits the limiting pin on the first nut, thus achieving mutual restraint between the first nut and the second nut and providing an anti-loosening effect for the double-threaded bolt. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a double-threaded anti-loosening bolt structure according to the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the second nut, the first movable groove, the annular groove, and the gear ring of this utility model;

[0014] Figure 3 This is a schematic diagram of the first and second movable grooves of this utility model;

[0015] Figure 4 This is a schematic diagram of the anti-loosening component of this utility model.

[0016] Explanation of markings in the diagram:

[0017] 1. Nut; 2. Screw; 3. First nut; 4. Second nut; 5. Limiting hole; 6. First movable groove; 7. Second movable groove; 8. Mounting ring; 9. Limiting pin; 10. Actuating plate; 11. Tension spring; 12. Annular groove; 13. Gear ring; 14. Internal teeth; 15. Connecting ring. Detailed Implementation

[0018] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a double-threaded anti-loosening bolt.

[0019] like Figures 1 to 4As shown, this utility model discloses a double-threaded anti-loosening bolt, comprising a double-threaded bolt and a nut assembly threadedly connected to the double-threaded bolt. The bolt includes a nut 1 and a screw 2, with the screw 2 located on the top surface of the nut 1 and coaxially arranged therewith. The screw 2 has two threads, one clockwise and one counterclockwise. The nut assembly includes a first nut 3 and a second nut 4 threadedly connected to the double-threaded bolt. The second nut 4 is located above the first nut 3 and abuts against it. The threads of the first nut 3 and the second nut 4 respectively engage with the two threads on the screw 2. When using this double-threaded bolt, it can be inserted into the mounting hole of the object to be connected. Then, the first nut 3 and the second nut 4 are screwed onto the screw 2, with the bottom surface of the first nut 3 abutting against the object, and the second nut 4 abutting against the top surface of the first nut 3.

[0020] Preferably, the second nut 4 is provided with an anti-loosening component that mates with the first nut 3. This anti-loosening component connects the first nut 3 and the second nut 4, thus restricting their rotation. Specifically, the anti-loosening component includes multiple first movable grooves 6 evenly distributed along the center of the second nut 4, which penetrate the second nut 4. A limiting pin 9 is movably disposed within each of the first movable grooves 6, and the top of each limiting pin 9 is connected by a mounting ring 8. Simultaneously, multiple limiting holes 5 are evenly distributed on the top surface of the first nut 3 for the insertion of the limiting pins 9. Inserting the limiting pin 9 into its corresponding limiting hole 5 connects the first nut 3 and the second nut 4.

[0021] It should be noted that the first nut 3 moves clockwise towards the nut 1 on the screw 2, while the second nut 4 moves counterclockwise towards the nut 1 on the screw 2. When the second nut 4 abuts against the first nut 3, friction is generated between them. The first nut 3 and the second nut 4 are connected by an anti-loosening component. When the first nut 3 rotates counterclockwise due to vibration or other reasons, it moves upward on the screw 2. The second nut 4, under the action of the anti-loosening component, rotates counterclockwise with the first nut 3. Simultaneously, the counterclockwise rotation of the second nut 4 moves downward on the screw 2, ensuring that the second nut 4 always abuts against the first nut 3. This achieves the purpose of preventing the double-threaded bolt from loosening.

[0022] The limiting holes 5 are distributed around the longitudinal center line of the first nut 3. In order to prevent the limiting pins 9 on the second nut 4 from deviating from the limiting holes 5 on the first nut 3 after the second nut 4 abuts against the first nut 3, the first movable groove 6 is an arc-shaped groove and is evenly distributed around the longitudinal center line of the second nut 4. Each limiting pin 9 can be moved and adjusted in its corresponding first movable groove 6, so that the limiting pin 9 can be inserted into the adjacent limiting hole 5.

[0023] To facilitate the connection between the adjusted limiting pin 9 and the second nut 4, a locking assembly is provided between the mounting ring 8 and the second nut 4, and the top surfaces of the mounting ring 8 and the second nut 4 are connected via the locking assembly. Specifically, the locking assembly includes an arc-shaped groove on the top surface of the second nut 4, and the lower middle part of the mounting ring 8 is movably disposed within the arc-shaped groove. A toothed ring 13 is provided on the inner wall of the arc-shaped groove, and multiple internal teeth 14 are distributed on the circumference of the lower middle part of the mounting ring 8, which can engage with the toothed ring 13. When the second nut 4 approaches the first nut 3, the limiting pin 9 will first contact the first nut 3. As the second nut 4 continues to descend, the mounting ring 8 will disengage from the annular groove 12 of the second nut 4 under the action of the limiting pin 9. After the second nut 4 abuts against the first nut 3, the mounting ring 8 will drive the limiting pin 9 to rotate and insert the limiting pin 9 into the limiting hole 5 of the adjacent first nut 3. The mounting ring 8 will then be inserted into the annular groove 12, allowing the internal teeth 14 on the mounting ring 8 to mesh with the toothed ring 13 of the annular groove 12.

[0024] The diameter of the limiting pin 9 is the same as the diameter of the limiting hole 5. This makes the connection between the second nut 4 and the first nut 3 more stable. Furthermore, a connecting ring 15 is provided on the mounting ring 8, and the outer diameter of the connecting ring 15 is larger than the outer diameter of the mounting ring 8. There is a gap between the connecting ring 15 and the top surface of the second nut 4, allowing for manual rotation of the mounting ring 8.

[0025] As another preferred option, such as Figure 3 and Figure 4As shown, the second nut 4 has a recessed second movable groove 7 on the bottom surface of the first movable groove 6, and an actuating plate 10 is slidably mounted on the limiting pin 9, with the actuating plate 10 slidably disposed within the second movable groove 7. A tension spring 11 is also provided between the actuating plate 10 and the mounting ring 8, and the tension spring 11 is sleeved on the limiting pin 9. When the limiting pin 9 contacts the first nut 3 and the second nut 4 continues to move downward, the tension spring 11 is stretched by the actuating plate 10 and the mounting ring 8. When the connecting ring 15 drives the mounting ring 8 to rotate, the limiting pin 9 on the mounting ring 8 also rotates, and the tension spring 11 on the limiting pin 9 and the actuating plate 10 also rotate accordingly. When the limiting pin 9 aligns with its adjacent limiting hole 5, the stretched tension spring 11 pulls the mounting ring 8 downward, and the limiting pin 9 on the mounting ring 8 automatically inserts into its corresponding limiting hole 5, saving time and improving efficiency.

[0026] Instructions for use: Pass the object to be connected through the screw 2, then screw the first nut 3 and the second nut 4 onto the screw 2, with the limiting hole 5 of the first nut 3 facing upwards and the limiting pin of the second nut 4 facing downwards. After the second nut 4 abuts against the first nut 3, rotate the mounting ring 8 via the connecting ring 15. The mounting ring 8 then drives the limiting pin 9 on it, rotating it until it aligns with its adjacent limiting hole 5. Then, the tension spring 11 will drive the limiting pin 9 through the mounting ring 8 to insert it into its aligned limiting hole 5. The lowered mounting ring 8 will also enter the annular groove 12 of the second nut 4, and the internal teeth 14 on the mounting ring 8 will mesh with the toothed ring 13 in the annular groove 12, thus achieving the purpose of preventing loosening of this double-threaded bolt.

[0027] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A double-threaded anti-loosening bolt, characterized in that: Includes a double-threaded bolt and a nut assembly threaded onto the double-threaded bolt; The nut assembly includes a first nut (3) and a second nut (4) threaded onto a double-threaded bolt, wherein the second nut (4) is located above the first nut (3) and abuts against the first nut (3); The second nut (4) is provided with an anti-loosening component that cooperates with the first nut (3), and the anti-loosening component includes a plurality of first movable grooves (6) evenly distributed along the center of the second nut (4). The first movable grooves (6) penetrate the second nut (4), and a limiting pin (9) is movably provided in the first movable groove (6). The top of each limiting pin (9) is connected by a mounting ring (8). Multiple limiting holes (5) for the insertion of limiting pins (9) are evenly distributed on the top surface of the first nut (3); The mounting ring (8) is connected to the second nut (4) by a locking assembly.

2. The double-threaded anti-loosening bolt according to claim 1, characterized in that: The locking assembly includes an arc-shaped groove on the top surface of the second nut (4), and the lower middle part of the mounting ring (8) is movably disposed in the arc-shaped groove. A toothed ring (13) is provided on the inner wall of the arc-shaped groove, and multiple internal teeth (14) are distributed on the circumference of the lower middle part of the mounting ring (8). The internal teeth (14) can mesh with the toothed ring (13).

3. The double-threaded anti-loosening bolt according to claim 2, characterized in that: The second nut (4) has a recessed second movable groove (7) on the bottom surface of the first movable groove (6), and an action plate (10) is slidably provided on the limiting pin (9). The action plate (10) is slidably provided in the second movable groove (7). A tension spring (11) is provided between the action plate (10) and the mounting ring (8), and the tension spring (11) is sleeved on the limiting pin (9).

4. A double-threaded anti-loosening bolt according to claim 3, characterized in that: The mounting ring (8) is provided with a connecting ring (15), and the outer diameter of the connecting ring (15) is larger than the outer diameter of the mounting ring (8).

5. A double-threaded anti-loosening bolt according to claim 1, characterized in that: The diameter of the limiting pin (9) is the same as the diameter of the limiting hole (5).

Images