Double-thread lock bolt

Abstract

The utility model discloses a double-thread lock bolt, and relates to the technical field of bolts. A double-thread anti-loosening bolt comprises a double-thread bolt body, the outer surface of the double-thread bolt body is provided with a first external thread and a second external thread, the anti-loosening structure is located on the double-thread bolt body, and the anti-loosening structure comprises two limiting blocks and two anti-loosening gear rods. Two limiting holes and two inserting holes are formed in the outer surface of the double-thread bolt body, the two limiting holes communicate with the interiors of the corresponding inserting holes, the two anti-disengagement gear rods are located in the corresponding inserting holes and are in interference fit with the interiors of the inserting holes, and the anti-disengagement gear rods on the bolt extend out of the inserting holes to physically block nuts. Meanwhile, friction force is generated between the limiting block made of rubber and the inner walls of the limiting hole and the inserting hole and between the limiting block made of rubber and the anti-disengaging gear rod made of rubber and the inner walls of the inserting hole through self-elasticity, the anti-loosening reliability is greatly improved through the dual effects, and therefore the problem of bolt loosening caused by failure of anti-loosening rubber is solved, and the stability of bolt connection is ensured.

Description

Technical Field

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

[0002] In the field of mechanical connection and fastening, bolts, as an important connecting component, are widely used in various engineering structures and equipment, undertaking the important tasks of connecting, fixing and transmitting loads.

[0003] Under harsh working conditions such as vibration, impact, or long-term load, traditional single-threaded bolts are prone to loosening or even falling off. To solve the problem of bolt loosening, anti-loosening measures often use locking washers and applying anti-loosening adhesive. These measures improve the anti-loosening performance of bolts to a certain extent. However, locking washers rely on the axial force generated by elastic deformation to prevent loosening, but the elastic potential energy decays rapidly during high-frequency vibration, and anti-loosening adhesive may fail due to environmental factors. Therefore, we propose a double-threaded anti-loosening bolt. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a double-threaded anti-loosening bolt that can solve the problem that traditional single-threaded bolts are prone to loosening or even falling off under harsh working conditions such as vibration, impact or long-term load. In order to solve the problem of bolt loosening, anti-loosening measures often use locking washers, applying anti-loosening adhesive, etc. These measures improve the anti-loosening performance of bolts to a certain extent. However, locking washers rely on the axial force generated by elastic deformation to prevent loosening, but the elastic potential energy decays rapidly under high-frequency vibration, and the anti-loosening adhesive may fail due to environmental influences.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-threaded anti-loosening bolt, comprising:

[0006] The body of the double-threaded bolt has external thread one and external thread two respectively opened on its outer surface;

[0007] Anti-loosening structure, located on the body of the double-threaded bolt;

[0008] The anti-loosening structure includes two limiting blocks and two anti-disengagement rods. Two limiting holes and two insertion holes are respectively opened on the outer surface of the double threaded bolt body. The two limiting holes are connected to the interior of the corresponding insertion holes. The two anti-disengagement rods are located inside the corresponding insertion holes and are interference-fitted with their interiors. The two limiting blocks are fixedly connected to one end of the corresponding anti-disengagement rods. The two limiting blocks are located inside the corresponding limiting holes and are interference-fitted with their interiors.

[0009] Preferably, the anti-loosening structure further includes two nuts and two retaining rings. The two nuts are internally threaded and are respectively threaded onto the outer surfaces of external thread one and external thread two. The two retaining rings are fixedly connected to one side of the corresponding nuts, and each retaining ring has a through groove.

[0010] Preferably, both the limiting block and the anti-detachment rod are made of rubber.

[0011] Preferably, the two insertion holes are arranged in a figure-eight shape on the body of the double-threaded bolt.

[0012] Preferably, the inclined surfaces on both limiting blocks are aligned with the outer surface of the double-threaded bolt body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This double-threaded anti-loosening bolt uses an anti-loosening stop bar on the bolt to extend out of the insertion hole and physically block the nut. At the same time, the rubber limiting block and the anti-loosening stop bar generate friction with the limiting hole and the inner wall of the insertion hole due to their own elasticity. The dual effect greatly enhances the reliability of anti-loosening, thereby avoiding the bolt loosening problem caused by the failure of the anti-loosening rubber and ensuring the stability of the bolt connection. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of the double-threaded bolt of this utility model;

[0018] Figure 3 This is a schematic diagram of the external thread structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the nut structure of this utility model.

[0020] Reference numerals in the attached drawings: 1. Double-threaded bolt body; 2. External thread one; 3. External thread two; 4. Nut; 5. Retaining ring; 6. Limiting block; 7. Anti-disengagement rod; 8. Limiting hole; 9. Insertion hole; 10. Internal thread; 11. Through groove. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a double-threaded anti-loosening bolt, comprising:

[0026] The double-threaded bolt body 1 has external threads 2 and external threads 3 respectively opened on its outer surface.

[0027] Anti-loosening structure, located on the body 1 of the double-threaded bolt;

[0028] The anti-loosening structure includes two limiting blocks 6 and two anti-disengagement rods 7. Two limiting holes 8 and two insertion holes 9 are respectively opened on the outer surface of the double threaded bolt body 1. The two limiting holes 8 are connected to the interior of the corresponding insertion holes 9. The two anti-disengagement rods 7 are located inside the corresponding insertion holes 9 and are interference-fitted with their interior. The two limiting blocks 6 are fixedly connected to one end of the corresponding anti-disengagement rod 7. The two limiting blocks 6 are located inside the corresponding limiting holes 8 and are interference-fitted with their interior.

[0029] The anti-loosening structure also includes two nuts 4 and two retaining rings 5. The two nuts 4 are both provided with internal threads 10. The two nuts 4 are respectively threaded onto the outer surfaces of external threads 1 2 and external threads 2 3. The two retaining rings 5 ​​are fixedly connected to one side of the corresponding nuts 4. The two retaining rings 5 ​​are both provided with through grooves 11.

[0030] Both the limiting block 6 and the anti-disengagement lever 7 are made of rubber. The two insertion holes 9 are arranged in a figure-eight shape on the double threaded bolt body 1. The inclined surfaces on the two limiting blocks 6 are aligned with the outer surface of the double threaded bolt body 1.

[0031] Furthermore, when using this device, the outer surface of the double-threaded bolt body 1 is respectively provided with external thread 1 2 and external thread 2 3 for threaded connection with nut 4. First, the two nuts 4 are respectively threaded onto the outer surface of external thread 1 2 and external thread 2 3. Since the nut 4 is provided with internal thread 10, it can be tightly connected with the corresponding external thread to achieve connection. A retaining ring 5 is fixedly connected to one side of each nut 4. A through groove 11 is provided on the retaining ring 5. The through groove 11 can play a certain auxiliary role in the subsequent anti-loosening process.

[0032] Next, when the nut 4 is about to be screwed to the innermost end, the through groove 11 on the retaining ring 5 is positioned at the limiting hole 8. Then, the two anti-loosening rods 7 are inserted into the corresponding insertion holes 9. Because the anti-loosening rods 7 are interference-fitted with the insertion holes 9, the anti-loosening rods 7 are securely installed in the insertion holes 9. The two limiting blocks 6 enter the corresponding limiting holes 8 as the anti-loosening rods 7 are inserted, so that the limiting blocks 6 are stably fixed in the limiting holes 8. This allows the anti-loosening rods 7 to extend out of the insertion holes 9 and be located on the side of the nut 4 away from the retaining ring 5, thereby blocking the nut 4. As the nut 4 continues to tighten, the retaining ring 5 exerts a squeezing effect on the limiting blocks 6. The rubber limiting blocks 6 and the anti-loosening rods 7, due to their own elasticity, will generate greater friction with the inner walls of the limiting holes 8 and insertion holes 9, thereby limiting the nut 4 from loosening under the action of external forces such as vibration, and achieving the anti-loosening function.

[0033] The anti-loosening lever 7 on the bolt extends out of the insertion hole 9 to physically block the nut 4. At the same time, the rubber limiting block 6 and the anti-loosening lever 7 generate friction with the inner walls of the limiting hole 8 and the insertion hole 9 due to their own elasticity. The dual effect greatly enhances the reliability of anti-loosening, thereby avoiding the bolt loosening problem caused by the failure of the anti-loosening adhesive and ensuring the stability of the bolt connection.

[0034] Structural Description: Double-threaded bolt body 1: As a basic component, its outer surface is provided with external thread 1 2 and external thread 2 3, providing a threaded connection base for the installation of nut 4;

[0035] External thread 12: It is formed on the outer surface of the double thread bolt body 1 and mates with the internal thread 10 of the corresponding nut 4 to achieve threaded connection;

[0036] External thread 2 3: It is formed on the outer surface of the double thread bolt body 1 and mates with the internal thread 10 of another nut 4 to form a double thread connection structure;

[0037] Nut 4: It has an internal thread 10, which is threaded onto external thread 2 and external thread 3 respectively, for fastening the connected parts;

[0038] Retaining ring 5: It is fixedly connected to one side of nut 4, and has a through groove 11 on it, which plays an auxiliary positioning and fitting role in the anti-loosening structure;

[0039] Limiting block 6: Made of rubber, it is fixedly connected to one end of the anti-disengagement rod 7. After being inserted into the limiting hole 8, it generates friction through the interference fit with the hole wall and the elasticity of the rubber, thus preventing the nut 4 from loosening.

[0040] Anti-loosening lever 7: Made of rubber, located inside the insertion hole 9 with an interference fit, one end is connected to the limiting block 6, and after extending out of the insertion hole 9, it can block the nut 4, and achieves anti-loosening through its own elasticity and friction.

[0041] Limiting hole 8: It is opened on the outer surface of the double threaded bolt body 1 and communicates with the insertion hole 9. It is used to accommodate the limiting block 6 and achieves positioning through interference fit with the limiting block 6.

[0042] Insertion hole 9: It is located on the outer surface of the double threaded bolt body 1, and is in the shape of an "eight". It is connected to the limiting hole 8 and is used to accommodate the anti-disengagement rod 7. The anti-disengagement rod 7 is fixed by interference fit.

[0043] Internal thread 10: It is formed inside the nut 4 and mates with external thread 1 2 and external thread 2 3 to realize the threaded connection between the nut 4 and the bolt body;

[0044] Through groove 11: It is opened on the retaining ring 5. When the nut 4 is screwed to a specific position, the through groove 11 is aligned with the limiting hole 8, providing a channel for the insertion of the anti-disengagement rod 7.

[0045] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A double-threaded anti-loosening bolt, characterized in that, include: The double-threaded bolt body (1) has external threads one (2) and external threads two (3) respectively opened on its outer surface; Anti-loosening structure, the anti-loosening structure is located on the body (1) of the double threaded bolt; The anti-loosening structure includes two limiting blocks (6) and two anti-disengagement rods (7). Two limiting holes (8) and two insertion holes (9) are respectively opened on the outer surface of the double threaded bolt body (1). The two limiting holes (8) are connected to the interior of the corresponding insertion holes (9). Among them, the two anti-disengagement rods (7) are located inside the corresponding insertion hole (9) and are interference-fitted with it. The two limit blocks (6) are fixedly connected to one end of the corresponding anti-disengagement rod (7). The two limit blocks (6) are located inside the corresponding limit hole (8) and are interference-fitted with it.

2. The double-threaded anti-loosening bolt according to claim 1, characterized in that: The anti-loosening structure also includes two nuts (4) and two retaining rings (5), and the two nuts (4) are both provided with internal threads (10); Two nuts (4) are threaded onto the outer surfaces of external thread one (2) and external thread two (3), respectively. Two retaining rings (5) are fixedly connected to one side of the corresponding nuts (4). Both retaining rings (5) have through grooves (11).

3. The double-threaded anti-loosening bolt according to claim 1, characterized in that: Both the limiting block (6) and the anti-detachment rod (7) are made of rubber.

4. A double-threaded anti-loosening bolt according to claim 1, characterized in that: The two insertion holes (9) are arranged in a figure-eight shape on the body (1) of the double threaded bolt.

5. A double-threaded anti-loosening bolt according to claim 1, characterized in that: The inclined surfaces on both limiting blocks (6) are aligned with the outer surface of the double threaded bolt body (1).

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