Combined self-locking nut and preparation method thereof

Abstract

The invention provides a combined self-locking nut and a preparation method thereof, and belongs to the technical field of fasteners, the combined self-locking nut comprises a bolt head, the top wall of the bolt head is fixedly connected with a bolt bar, the outer wall of the bolt bar is provided with external threads, the outer wall of the bolt bar is provided with uniformly distributed guide grooves, the inner walls of the guide grooves are provided with uniformly distributed limiting holes, and the limiting holes are arranged in the bolt bar. The combined nut B is in threaded connection with the outer wall of the bolt rod through an internal thread, the outer wall of the combined nut B is fixedly connected with clamping blocks which are uniformly distributed, and an embedding groove is formed between the clamping block and the combined nut B which are adjacent to each other. According to the combined nut, the arranged guide plate has certain toughness and can push the limiting ball to be clamped into the limiting hole, so that the combined nut B is subjected to auxiliary limiting, the combined nut B is prevented from moving upwards, the combined nut A is subjected to double limiting locking in cooperation with the combined nut B, the stability is enhanced, and the combined nut has higher strength and longer service life in use.

Description

Technical Field

[0001] The invention relates to the technical field of fasteners, and in particular to a combined self-locking nut and a preparation method thereof. Background Art

[0002] Combination nuts are a type of mechanical connector consisting of multiple parts, designed to connect and fix various mechanical parts and achieve multiple functions such as locking, positioning and limiting. Its modular structure provides flexibility and facilitates installation and maintenance. It is widely used in mechanical equipment, automotive industry, furniture manufacturing and electronic equipment.

[0003] Existing combination nuts are self-locking through friction when in use. If the friction is insufficient, for example due to fatigue wear, loosening cannot be effectively prevented. Especially in some important areas such as railways, high-frequency vibrations are inevitable, and the friction may not be sufficient to overcome the dynamic load, causing the nut to loosen.

[0004] Therefore, there is an urgent need for a combined self-locking nut and a preparation method thereof to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a combined self-locking nut and a preparation method thereof to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: A combined self-locking nut comprises a bolt head, a bolt rod is fixedly connected to the top wall of the bolt head, an outer wall of the bolt rod is provided with an external thread, the outer wall of the bolt rod is provided with evenly distributed guide grooves, and the inner wall of the guide groove is provided with evenly distributed limiting holes, and further comprises: The combination nut B is threadedly connected to the outer wall of the bolt rod through an internal thread, the outer wall of the combination nut B is fixedly connected with evenly distributed clamping blocks, an engaging groove is provided between the adjacent clamping blocks and the combination nut B, and the outer wall is fixedly connected with evenly distributed top clamping teeth; A self-locking assembly, the self-locking assembly comprising a combination nut A threadedly connected to the outer wall of the bolt rod through an internal thread, the top wall of the combination nut A is fixedly connected with evenly distributed engaging blocks, a clamping groove is provided between adjacent engaging blocks and the combination nut A, the inner wall of the clamping groove is fixedly connected with evenly distributed bottom clamping teeth, and the outer wall of the bottom clamping teeth is meshed and connected with the outer wall of the top clamping teeth; The limiting component is arranged on the inner wall of the combination nut B.

[0007] As a preferred technical solution of the present application, the limit assembly includes a positioning ring rotatably connected to the inner wall of the combination nut B, the top wall of the positioning ring is fixedly connected to the limit block, the outer wall of the limit block is fixedly connected with a uniformly distributed guide plate, and the outer wall of the guide plate is fixedly connected with a limit ball.

[0008] As a preferred technical solution of the present application, the guide plate is slidably connected to the guide groove.

[0009] As a preferred technical solution of the present application, the outer wall of the combination nut B is fixedly connected with evenly distributed reinforcement plates.

[0010] As a preferred technical solution of the present application, the top wall of the combination nut A is fixedly connected with an arc block, and the arc block is threadedly connected to the bolt rod.

[0011] As a preferred technical solution of the present application, the card block is located on the inner wall of the card slot.

[0012] As a preferred technical solution of the present application, the engaging block is located on the inner wall of the engaging groove.

[0013] As a preferred technical solution of the present application, the limiting ball is located on the inner wall of the limiting hole.

[0014] As a preferred technical solution of the present application, the outer wall of the arc block abuts against the outer wall of the clamping block.

[0015] The present invention also discloses a method for preparing the combined self-locking nut, which specifically comprises the following steps: S1. Select high-strength steel or alloy materials to ensure their rigidity and durability under load. Forging or machining is used to process the rigid materials into a suitable shape as required for preparation. Specifically, a structure with an integrated bolt head and bolt rod and a stroke prototype of combination nut A and combination nut B are prepared; S2. Use thread rolling or cutting to achieve external threads and ensure their accuracy; S3, opening a guide groove on the outer wall of the bolt rod by milling, and forming a limit hole by drilling or milling; S4. An internal thread is formed by milling or cutting to facilitate connection with the bolt rod. The clamping block on the outer wall of the combination nut B is fixed to the outside of the combination nut B by cutting, and a mounting groove for fixing the reinforcing plate is opened; S5. The reinforcing plate is made of flexible metal and is fixed on the combination nut B. The combination nut B and the clamping block each occupy half of the specific position; S6. The limit block and the positioning ring are an integrated structure, and the corresponding shapes are formed by cutting. The combination nut B is cut in advance and the positioning ring and the limit block are embedded in advance. Then the combination nut B is welded and worn; S7, the limit block and the positioning ring are an integrated structure, and the corresponding shapes are formed by cutting. The combination nut B is cut in advance and the positioning ring and the limit block are embedded in advance, and then the combination nut B is welded and worn; S7. The same combination nut A is prepared into the required structure by cutting and drilling, and the precision of the engagement between the bottom clamping teeth 14 and the top clamping teeth 12 must be ensured.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: 1. The card block can be rotated outwards through an arc, and the card block is driven into the card slot by squeezing the arc block during the movement. At this time, the bottom card teeth and the top card teeth are slidably engaged. When the combination nut A has a tendency to rotate due to vibration, the combination nut A is limited and fixed by the bottom card teeth and the card block, which can effectively prevent the combination nut A from having a tendency to rotate during vibration or impact, thereby reducing the risk of loosening and ensuring the stability and safety of the connection. In addition, the automatic limit locking combination nut A during the rotation of the combination nut B, the sliding engagement design of the bottom card teeth and the top card teeth helps to more evenly distribute the load applied to the combination nut A, reduce the risk of damage caused by single-point force, and extend the service life, solving the problem that the existing technology cannot effectively prevent loosening if the friction force is insufficient, such as fatigue wear. 2. The guide plate has a certain toughness, which can push the limit ball into the limit hole, so as to realize auxiliary limit of the combination nut B, prevent the combination nut B from moving upward, and cooperate with the combination nut B to perform double limit locking on the combination nut A, enhance stability, and make the combination nut have a higher strength and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of the combined self-locking nut and its preparation method provided in this application; Figure 2 A cross-sectional view of the combined self-locking nut and the preparation method thereof provided in the present application; Figure 3 An exploded diagram of the combined self-locking nut and the preparation method thereof provided in the present application; Figure 4 A schematic structural diagram of the combined nut part A of the combined self-locking nut and the preparation method thereof provided in the present application; Figure 5 A schematic diagram of the structure of the limit block portion of the combined self-locking nut and the preparation method thereof provided in the present application; Figure 6 This is a schematic structural diagram of the combined nut part B of the combined self-locking nut and its preparation method provided in this application.

[0018] Indicated in the figure: 1. Bolt head; 2. Bolt rod; 3. Guide groove; 4. Limit hole; 5. Combination nut A; 6. Combination nut B; 7. Block; 8. Reinforcement plate; 9. Limit block; 10. Guide plate; 11. Limit ball; 12. Top clamping tooth; 13. Clamping groove; 14. Bottom clamping tooth; 15. Arc block; 16. Positioning ring; 17. External thread; 18. Internal thread; 19. Fitting block; 20. Fitting groove. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0020] like Figure 1-6 As shown, the combined self-locking nut proposed in this embodiment includes a bolt head 1, a bolt rod 2 is fixedly connected to the top wall of the bolt head 1, an outer wall of the bolt rod 2 is provided with an external thread 17, the outer wall of the bolt rod 2 is provided with evenly distributed guide grooves 3, and the inner wall of the guide groove 3 is provided with evenly distributed limiting holes 4, and also includes: The combination nut B6 is threadedly connected to the outer wall of the bolt rod 2 through the internal thread 18. The outer wall of the combination nut B6 is fixedly connected with evenly distributed clamping blocks 7. An engaging groove 20 is provided between adjacent clamping blocks 7 and the combination nut B6. The outer wall is fixedly connected with evenly distributed top clamping teeth 12. The self-locking component includes a combination nut A5 threadedly connected to the outer wall of the bolt rod 2 through an internal thread 18, and the top wall of the combination nut A5 is fixedly connected with evenly distributed interlocking blocks 19. A slot 13 is provided between adjacent interlocking blocks 19 and the combination nut A5. The inner wall of the slot 13 is fixedly connected with evenly distributed bottom teeth 14, and the outer wall of the bottom teeth 14 is meshed and connected with the outer wall of the top teeth 12. The combination nut A5 and the arc block 15 are installed through the internal thread 18 and the external thread 17, and the installation is achieved through the thread cooperation between the external thread 17 and the internal thread 18. Then, the combination nut B6 is rotated to achieve connection through the thread cooperation between the internal thread 18 and the external thread 17 of the combination nut B6. The combination nut B6 is rotated in the overall direction. During the downward movement, the limit block 9 will be driven to move, and then the guide plate 10 will be driven to slide in the guide groove 3. During the sliding of the guide plate 10, the limit ball 11 will be driven to move. The guide plate 10 has a certain toughness and can push the limit ball 11 to be stuck in the limit hole 4. When the block 7 contacts the arc block 15, the arc block 15 is squeezed and deformed outward to a certain extent until the block 7 is completely engaged with the slot 13. The block 7 returns to its original position and slides and engages with the bottom tooth 14 through the top tooth 12. When the combination nut A5 vibrates and loosens, it will move upward as a whole and rotate. At this time, the top tooth 12 and the block 7 can effectively weaken or even offset the impact force of the combination nut A5 rotating. The limiting component is arranged on the inner wall of the combination nut B6.

[0021] like Figure 3 and Figure 5As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the limiting assembly includes a positioning ring 16 rotatably connected to the inner wall of the combination nut B6, the top wall of the positioning ring 16 is fixedly connected to the limiting block 9, the outer wall of the limiting block 9 is fixedly connected with a uniformly distributed guide plate 10, the outer wall of the guide plate 10 is fixedly connected with a limiting ball 11, and the combination nut B6 is limited by the limiting ball 11 to assist, double limiting, to avoid loosening of the combination nut A5, to get rid of the loosening caused by the vibration of the combination nut A5 due to traditional friction, when disassembly is required, the inside of the card slot 13 is an inclined surface, which can play a guiding role when the card block 7 is moved out, and it is convenient to move the card block 7 out.

[0022] like Figure 1 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the guide plate 10 is slidably connected to the guide groove 3, and the limit block 9 does not rotate with the combination nut B6.

[0023] like Figure 2-3 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the outer wall of the combination nut B6 is fixedly connected with uniformly distributed reinforcing plates 8, the reinforcing plates 8 have strong rigidity and can undergo a certain deformation, connecting and fixing the combination nut B6 and the block 7, thereby extending the service life of the movement of the block 7.

[0024] like Figure 1-3 As shown, as a preferred embodiment, on the basis of the above method, further, the top wall of the combination nut A5 is fixedly connected with an arc block 15, and the arc block 15 is threadedly connected to the bolt rod 2, so that the clamping block 7 can be guided and moved through the arc block 15.

[0025] like Figure 1-3 As shown, as a preferred embodiment, on the basis of the above method, further, the clamping block 7 is located on the inner wall of the clamping slot 13, and the clamping block 7 is clamped into the clamping slot 13 to achieve the limiting fixation of the combination nut B6 on the combination nut A5.

[0026] like Figure 1-3 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the engaging block 19 is located on the inner wall of the engaging groove 20, and the meshing locking is achieved by the engagement between the engaging block 19 and the engaging groove 20.

[0027] like Figure 2 As shown, as a preferred embodiment, on the basis of the above method, further, the limiting ball 11 is located on the inner wall of the limiting hole 4, and the limiting ball 11 is inserted into the limiting hole 4 to limit and fix the combination nut B6, thereby preventing the combination nut B6 from moving upward.

[0028] like Figure 2As shown, as a preferred embodiment, on the basis of the above method, further, the outer wall of the arc block 15 is against the outer wall of the block 7, and the arc structure of the arc block 15 can drive the block 7 to move outward when the block 7 squeezes the arc block 15, so that the block 7 is easy to be inserted into the slot 13.

[0029] Specifically, when using the combined self-locking nut and its preparation method: high-strength steel or alloy material is selected to ensure its rigidity and durability under load; as a preparation requirement, the rigid material is processed into a suitable shape by forging or machining, and a bolt head 1 and a bolt rod 2 are made into an integrated structure and a combined nut A5 and a combined nut B6 stroke prototype are specifically prepared; the external thread 17 is realized by thread rolling or cutting to ensure its accuracy; a guide groove 3 is opened on the outer wall of the bolt rod 2 by milling, and a limit hole 4 is formed by drilling or milling; an internal thread 18 is formed by milling or cutting to facilitate connection with the bolt rod 2, and the block 7 on the outer wall of the combined nut B6 is fixed to the combined nut B6 by cutting. On the outside, a mounting groove for fixing the reinforcing plate 8 is provided; the reinforcing plate 8 is made of flexible metal and is installed and fixed on the combination nut B6, and the specific position of the combination nut B6 and the clamping block 7 each occupies half; the limit block 9 and the positioning ring 16 are an integrated structure, and the corresponding shape is formed by cutting. The combination nut B6 is cut in advance and the positioning ring 16 and the limit block 9 are embedded, and then the combination nut B6 is welded and worn; the limit block 9 and the positioning ring 16 are an integrated structure, and the corresponding shape is formed by cutting. The combination nut B6 is cut in advance and the positioning ring 16 and the limit block 9 are embedded, and then the combination nut B6 is welded and worn; the same combination nut A5 is prepared into the required structure by cutting and drilling, and it is necessary to ensure that the bottom clamping tooth 14 The precision of the engagement with the top clamping tooth 12; when in use, first install the combination nut A5 and the arc block 15 through the internal thread 18 and the external thread 17, and realize the installation through the thread cooperation between the external thread 17 and the internal thread 18, then rotate the combination nut B6, and realize the connection through the thread cooperation between the internal thread 18 and the external thread 17 of the combination nut B6. The combination nut B6 will drive the limit block 9 to move during the overall downward movement, and then drive the guide plate 10 to slide in the guide groove 3. During the sliding of the guide plate 10, the limit ball 11 will be driven to move. The guide plate 10 has a certain toughness and can push the limit ball 11 to be stuck in the limit hole 4. When the clamping block 7 contacts the arc block 15, the arc block 1 5 is squeezed and deformed outward to a certain extent until the block 7 is completely engaged with the slot 13, the block 7 returns to its original position and slides and engages with the bottom tooth 14 through the top tooth 12. When the combination nut A5 is loosened by vibration, it will move upward and rotate as a whole. At this time, the top tooth 12 and the block 7 can effectively weaken or even offset the impact force of the rotation of the combination nut A5, and the limiting ball 11 is used to assist in limiting the combination nut B6. Double limiting can prevent the combination nut A5 from loosening, and get rid of the loosening caused by the vibration of the combination nut A5 due to traditional friction. When it needs to be disassembled, the inside of the slot 13 is an inclined surface, which can guide the block 7 when it is moved out, making it convenient for the block 7 to be moved out.

[0030] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A combined self-locking nut, comprising a bolt head (1), characterized in that: The top wall of the bolt head (1) is fixedly connected to a bolt rod (2), the outer wall of the bolt rod (2) is provided with an external thread (17), the outer wall of the bolt rod (2) is provided with evenly distributed guide grooves (3), and the inner wall of the guide groove (3) is provided with evenly distributed limiting holes (4), and further comprises: A combination nut B (6) is threadedly connected to the outer wall of the bolt rod (2) via an internal thread (18); the outer wall of the combination nut B (6) is fixedly connected with evenly distributed clamping blocks (7); an engaging groove (20) is provided between adjacent clamping blocks (7) and the combination nut B (6); and the outer wall is fixedly connected with evenly distributed top clamping teeth (12); A self-locking component, the self-locking component comprising a combination nut A (5) threadedly connected to the outer wall of a bolt rod (2) via an internal thread (18), the top wall of the combination nut A (5) being fixedly connected with evenly distributed engaging blocks (19), a clamping groove (13) being provided between adjacent engaging blocks (19) and the combination nut A (5), the inner wall of the clamping groove (13) being fixedly connected with evenly distributed bottom clamping teeth (14), and the outer wall of the bottom clamping teeth (14) being meshingly connected with the outer wall of the top clamping teeth (12); The limit assembly is arranged on the inner wall of the combination nut B (6).

2. The combined self-locking nut according to claim 1, characterized in that: The limit assembly comprises a positioning ring (16) rotatably connected to the inner wall of the combination nut B (6); the top wall of the positioning ring (16) is fixedly connected to a limit block (9); the outer wall of the limit block (9) is fixedly connected to evenly distributed guide plates (10); and the outer wall of the guide plate (10) is fixedly connected to a limit ball (11).

3. The combined self-locking nut according to claim 2, characterized in that: The guide plate (10) is slidably connected to the guide groove (3).

4. The combined self-locking nut according to claim 1, characterized in that: The outer wall of the combination nut B (6) is fixedly connected with evenly distributed reinforcement plates (8).

5. The combined self-locking nut according to claim 1, characterized in that: The top wall of the combined nut A (5) is fixedly connected with an arc-shaped block (15), and the arc-shaped block (15) is threadedly connected to the bolt rod (2).

6. The combined self-locking nut according to claim 1, characterized in that: The clamping block (7) is located on the inner wall of the clamping slot (13).

7. The combined self-locking nut according to claim 1, characterized in that: The engaging block (19) is located on the inner wall of the engaging groove (20).

8. The combined self-locking nut according to claim 2, characterized in that: The limiting ball (11) is located on the inner wall of the limiting hole (4).

9. The combined self-locking nut according to claim 5, characterized in that: The outer wall of the arc-shaped block (15) abuts against the outer wall of the clamping block (7).

10. The method for preparing the combined self-locking nut according to claim 1, characterized in that: The following steps are involved: S1. Select high-strength steel or alloy material to ensure its rigidity and durability under load. Forging or machining is used to process the rigid material into a suitable shape as required for preparation. Specifically, a one-piece structure of the bolt head (1) and the bolt rod (2) and a stroke prototype of the combination nut A (5) and the combination nut B (6) are prepared. S2, using thread rolling or cutting to achieve external thread (17) and ensure its accuracy; S3, opening a guide groove (3) on the outer wall of the bolt rod (2) by milling, and forming a limit hole (4) by drilling or milling; S4. An internal thread (18) is formed by milling or cutting to facilitate connection with the bolt rod (2). A clamping block (7) on the outer wall of the combination nut B (6) is fixed to the outside of the combination nut B (6) by cutting, and a mounting groove for fixing the reinforcing plate (8) is provided. S5, the reinforcing plate (8) is made of flexible metal and is fixed on the combination nut B (6), and the specific position of the combination nut B (6) and the clamping block (7) each occupies half; S6, the limit block (9) and the positioning ring (16) are an integrated structure, formed into corresponding shapes by cutting, the combination nut B (6) is cut in advance and the positioning ring (16) and the limit block (9) are embedded in advance, and then the combination nut B (6) is welded and worn; S7, the limit block (9) and the positioning ring (16) are an integrated structure, and are formed into corresponding shapes by cutting, the combination nut B (6) is cut in advance and the positioning ring (16) and the limit block (9) are embedded in advance, and then the combination nut B (6) is welded and worn; S7. The same combination nut A (5) is prepared into the required structure by cutting and drilling, and the precision of the engagement between the bottom locking teeth 14 and the top locking teeth 12 must be ensured.

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