A high-voltage ratio combined nut structure

Abstract

The application relates to the technical field of fasteners and discloses a combined nut structure with high variable ratio, which comprises a connecting bolt, two grooves arranged in the axial direction are arranged on the bolt rod, a positioning nut is connected with the bolt rod, a tooth sleeve is sleeved on the positioning nut, a first sawtooth is arranged on the side away from the bolt head, a directional sleeve is internally provided with a second connecting hole, the inside of the directional sleeve is provided with two convex columns matched with the grooves, the directional sleeve is sleeved on the bolt rod, a second sawtooth is arranged on the side close to the bolt head, the first sawtooth is engaged with the second sawtooth, a plurality of positioning holes are further arranged on the other side of the directional sleeve, a flower nut is threadedly connected with the bolt rod, a limiting block is arranged on one side of the flower nut, a positioning groove is arranged on the limiting block, a fastening block is arranged on the other side of the flower nut, a lock pin is installed in the positioning hole, and the positioning nut, the tooth sleeve, the directional sleeve and the flower nut are sequentially sleeved on the bolt rod. The application not only improves the stability and the anti-vibration performance of the connection, but also has the advantages of convenient operation, multi-position fixing and the like.

Description

Technical Field

[0001] This invention relates to the field of fastener technology, and in particular to a high-ratio composite nut structure. Background Technology

[0002] A bolt is a mechanical part, a cylindrical threaded fastener used with a nut. It consists of a head and a shank (a cylinder with external threads), and is used to fasten two parts with through holes. This type of connection is called a bolted connection. Since the two parts can be separated by unscrewing the nut, a bolted connection is a detachable connection.

[0003] In the existing fastener field, bolts are widely used as connectors in various mechanical structures, primarily functioning to work with nuts to achieve a secure connection. While traditional nut structures meet connection requirements to a certain extent, in specific applications, such as environments subject to high variable forces or requiring frequent disassembly, traditional nuts often suffer from problems such as easy loosening and poor durability, especially loosening under vibration. Furthermore, for some special applications, such as those with limited space or requiring precise adjustment of tightening force, the structure and function of traditional nuts are also insufficient. Therefore, developing a novel high-variable-ratio composite nut structure aims to solve the above problems, improve the performance and reliability of the nut, and has significant practical application value and market prospects. Summary of the Invention

[0004] The purpose of this invention is to provide a high-ratio combined nut structure to solve the above-mentioned problems.

[0005] This invention provides a high-ratio combined nut structure, comprising:

[0006] A connecting bolt includes a bolt head and a bolt shank, wherein the bolt shank is provided with threads and two grooves, the grooves being arranged along the axial direction of the bolt shank;

[0007] A positioning nut has internal threads and is threaded to the bolt rod. The positioning nut is used to fix the connected part between the positioning nut and the bolt head.

[0008] A toothed sleeve has a first connecting hole inside, the shape of which matches the shape of the positioning nut. The toothed sleeve is fitted onto the positioning nut, and a first serration is provided on the side of the toothed sleeve away from the bolt head.

[0009] The directional sleeve has a second connecting hole inside, and two protrusions are provided in the second connecting hole. The protrusions match the groove. The shape of the second connecting hole matches the bolt rod. The directional sleeve is sleeved on the bolt rod. The side of the directional sleeve near the bolt head is provided with a second serration. The first serration meshes with the second serration. The side of the directional sleeve away from the bolt head is provided with several positioning holes.

[0010] The flower nut has a third connecting hole inside, and the third connecting hole has a thread. The flower nut is threaded to the bolt rod. The flower nut has a limiting block on the side near the bolt head. The limiting block has a positioning groove, which includes a first positioning groove, a second positioning groove, and a limiting groove. The flower nut has a fastening block on the side away from the bolt head.

[0011] A locking pin, which is installed in the positioning hole;

[0012] The positioning nut, toothed sleeve, directional sleeve, and flower nut are sequentially fitted onto the bolt rod.

[0013] Preferably, the positioning nut is an external hexagonal nut.

[0014] Preferably, the meshing degree between the first saw tooth and the second saw tooth is 40%-99%.

[0015] Preferably, the cross-sectional diameter of the flower nut is smaller than the cross-sectional diameter of the directional sleeve.

[0016] Preferably, both the first positioning groove and the second positioning groove penetrate the limiting block, the limiting groove is located on the side away from the fastening block, and the limiting groove and the second positioning groove are connected vertically.

[0017] Preferably, the locking pin includes a locking pin body and a locking pin connector, the locking pin body being disposed in the limiting groove, and the locking pin connector being disposed in the second positioning groove.

[0018] Preferably, the sum of the width of the first positioning groove and the width of the portion of the second positioning groove that can accommodate the locking pin body is greater than the diameter of the locking pin body, and the width of the second positioning groove is less than the diameter of the locking pin body.

[0019] Preferably, the depth of the positioning hole is less than the length of the locking pin body, and the depth of the limiting groove is the difference between the length of the locking pin body and the depth of the positioning hole.

[0020] Preferably, the fastening block is hexagonal in shape.

[0021] Preferably, the number of positioning holes is 23 and the number of positioning slots is 11.

[0022] Compared with existing technologies, the advantages of this invention are that the threaded connection between the positioning nut and the bolt shank firmly fixes the connected parts between the positioning nut and the bolt head, improving the overall structural connection stability. The first and second serrations between the toothed sleeve and the directional sleeve mesh with each other, forming a mechanical lock, increasing the stability of the entire structure under vibration and effectively reducing the risk of loosening. A limiting block is provided on the side of the nut near the bolt head, and the limiting groove includes a first positioning groove, a second positioning groove, and a limiting groove, allowing for easy installation and removal of the nut, improving operational efficiency. The directional sleeve has several positioning holes, allowing for the selection of different positioning holes for locking pin installation as needed, achieving multi-position fixing and increasing flexibility. This modular nut structure is compact, occupies little space, and is suitable for installation needs in various confined spaces. Due to its unique structure and combination of multiple functional components, this modular nut structure is suitable for various connection scenarios, such as mechanical equipment and construction engineering. The high-ratio combined nut structure of the present invention not only ensures that the nut will never loosen under any tightening force, thus improving the stability and vibration resistance of the connection, but also has the advantages of convenient operation and multi-position fixing, making it suitable for a wide range of fields and applications. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a high-ratio combined nut structure according to the present invention;

[0025] Figure 2 This is a top view of the toothed sleeve in an embodiment of the present invention;

[0026] Figure 3 This is a bottom view of the directional sleeve in an embodiment of the present invention;

[0027] Figure 4 This is a top view of the directional sleeve in an embodiment of the present invention;

[0028] Figure 5 This is one of the structural schematic diagrams of the flower nut in the embodiments of the present invention;

[0029] Figure 6 This is the second schematic diagram of the flower nut structure in the embodiment of the present invention;

[0030] Figure 7 This is a top view of the flower nut in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the locking pin structure in an embodiment of the present invention.

[0032] Among them, 1. connecting bolt; 11. bolt head; 12. bolt shank; 13. groove; 2. positioning nut; 3. toothed sleeve; 31. first connecting hole; 32. first serration; 4. directional sleeve; 41. second connecting hole; 42. protruding post; 43. second serration; 44. positioning hole; 5. flower nut; 51. third connecting hole; 52. limiting block; 53. positioning groove; 531. first positioning groove; 532. second positioning groove; 533. limiting groove; 54. fastening block; 6. locking pin; 61. locking pin body; 62. locking pin connector; 100. connected part. Detailed Implementation

[0033] 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0035] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] like Figures 1-8 As shown, the present invention provides a high-ratio combined nut structure, comprising:

[0038] The connecting bolt 1 includes a bolt head 11 and a bolt shank 12. The bolt shank 12 is provided with threads and two grooves 13, which are arranged along the axial direction of the bolt shank 12.

[0039] The positioning nut 2 has internal threads and is threaded to the bolt rod 12. The positioning nut 2 is used to fix the connected part 100 between the positioning nut 2 and the bolt head 11.

[0040] The toothed sleeve 3 has a first connecting hole 31 inside. The shape of the first connecting hole 31 matches the shape of the positioning nut 2. The toothed sleeve 3 is fitted onto the positioning nut 2. The toothed sleeve 3 has a first serration 32 on the side away from the bolt head 11.

[0041] The directional sleeve 4 has a second connecting hole 41 inside, and two protrusions 42 are provided in the second connecting hole 41. The protrusions 42 match the groove 13. The shape of the second connecting hole 41 matches the bolt rod 12. The directional sleeve 4 is sleeved on the bolt rod 12. The side of the directional sleeve 4 near the bolt head 11 is provided with a second serration 43. The first serration 32 and the second serration 43 mesh with each other. The side of the directional sleeve 4 away from the bolt head 11 is provided with several positioning holes 44.

[0042] The flower nut 5 has a third connecting hole 51 inside, and the third connecting hole 51 has a thread. The flower nut 5 is threadedly connected to the bolt rod 12. The flower nut 5 has a limiting block 52 on the side near the bolt head 11. The limiting block 52 has a positioning groove 53. The positioning groove 53 includes a first positioning groove 531, a second positioning groove 532 and a limiting groove 533. The flower nut 5 has a fastening block 54 on the side away from the bolt head 11.

[0043] Locking pin 6 is installed in positioning hole 44;

[0044] Positioning nut 2, toothed sleeve 3, directional sleeve 4 and flower nut 5 are sequentially fitted onto bolt rod 12.

[0045] In some embodiments of this application, the positioning nut 2 is an external hexagonal nut.

[0046] The positioning nut 2 is an external hexagonal nut with six faces, each of which can be operated with a wrench to tighten or loosen it.

[0047] In some embodiments of this application, the meshing degree between the first saw tooth 32 and the second saw tooth 43 is 40%-99%.

[0048] The engagement degree between the first sawtooth 32 and the second sawtooth 43 is 40%-99%. This ensures sufficient contact area between the sawtooths to effectively transmit and disperse the enormous reaction force generated when the locating nut 2 is tightened. In this way, damage to the teeth on the toothed sleeve 3 and the directional sleeve 4 due to excessive stress is prevented, ensuring the stability and durability of the entire mechanical structure. This range of engagement degree guarantees sufficient strength while avoiding excessive friction and wear, thereby extending the service life of the equipment and reducing maintenance costs.

[0049] In some embodiments of this application, the cross-sectional diameter of the flower nut 5 is smaller than the cross-sectional diameter of the directional sleeve 4.

[0050] The cross-sectional diameter of the nut 5 is smaller than that of the locating sleeve 4. By tightening the nut 5, it is made to fit tightly with the locating sleeve 4, thereby achieving precise positioning and fixation of the connecting parts. This design not only ensures the stability of the structure but also facilitates installation and disassembly, improving overall efficiency and reliability. Furthermore, because the cross-section of the nut 5 is smaller than that of the locating sleeve 4, it ensures that even if the nut 5 rotates during installation and disassembly, it will not affect other parts.

[0051] In some embodiments of this application, both the first positioning groove 531 and the second positioning groove 532 penetrate the limiting block 52, and the limiting groove 533 is located on the side away from the fastening block 54, and the limiting groove 533 and the second positioning groove 532 are connected vertically. The retaining wall surface of the limiting groove 533 is on the side near the positioning nut 2 that is rotated and tightened.

[0052] In this embodiment, both the first positioning groove 531 and the second positioning groove 532 penetrate the limiting block 52, providing a clear positioning point for the connector. The limiting groove 533 is located on the side away from the fastening block 54, ensuring that the limiting groove 533 will not interfere with the fastening block 54 during installation or disassembly. Furthermore, the limiting groove 533 and the second positioning groove 532 are vertically connected. This design not only enhances the stability of the structure but also allows for precise positioning of the connector in the vertical direction, thereby ensuring accurate assembly and functional realization of the entire device.

[0053] In some embodiments of this application, the locking pin 6 includes a locking pin body 61 and a locking pin connector 62. The locking pin body 61 is disposed in the limiting groove 533, and the locking pin connector 62 is disposed in the second positioning groove 532.

[0054] The locking pin 6 includes a locking pin body 61 and a locking pin connector 62. The locking pin body 61 is designed as a robust metal rod or bar-like structure. It is installed within the positioning hole 44 and the limiting groove 533 to fix its position and ensure it does not move or fall off during use. The locking pin connector 62 is an assembly connected to the locking pin body 61. It can be a ring, hook, bar, or other form of structure. The locking pin connector 62 is disposed within the second positioning groove 532, which limits its range of motion. The entire locking pin 6 device is designed to provide a reliable and easy-to-operate locking mechanism for securing or locking certain components of equipment, preventing accidental movement or separation during transportation, operation, or storage. By respectively positioning the locking pin body 61 and the locking pin connector 62 within the second positioning groove 532 and the limiting groove 533, the locking pin 6 device maintains stability and functionality under various operating conditions.

[0055] In some embodiments of this application, the width of the first positioning groove 531 plus the portion of the second positioning groove 532 that can accommodate the locking pin body 61 is greater than the diameter of the locking pin body 61, and the width of the second positioning groove 532 is less than the diameter of the locking pin body 61.

[0056] The width of the first positioning groove 531 plus the portion of the second positioning groove 532 that can accommodate the locking pin body 61 is greater than the diameter of the locking pin body 61, allowing the locking pin body 61 to be easily inserted without obstruction. This design allows the locking pin body 61 to move freely within the first positioning groove 531, enabling flexible positioning and adjustment. Conversely, the width of the second positioning groove 532 is smaller than the diameter of the locking pin body 61, ensuring that the locking pin body 61 cannot be directly moved out. This design can be used to fix the position of the locking pin body 61, preventing accidental movement during use, thereby improving the stability and safety of the overall structure.

[0057] In some embodiments of this application, the depth of the positioning hole 44 is less than the length of the locking pin body 61, and the depth of the limiting groove 533 is the difference between the length of the locking pin body 61 and the depth of the positioning hole 44.

[0058] The depth of the positioning hole 44 is less than the length of the locking pin body 61, allowing a portion of the locking pin body 61 to protrude from the surface of the positioning hole 44. Simultaneously, the depth of the limiting groove 533 is designed to be the difference between the length of the locking pin body 61 and the depth of the positioning hole 44. This ensures that after the locking pin body 61 is inserted into the positioning hole 44 and passes through the limiting groove 533, it can be properly limited and fixed in the appropriate position, preventing over-insertion or slippage, thereby achieving a stable and reliable locking effect.

[0059] In some embodiments of this application, the fastening block 54 is hexagonal in shape.

[0060] The fastening block 54 is designed in an external hexagonal shape to facilitate tightening with a wrench. Due to the small size of the flower nut 5, it may be difficult to operate by hand during installation, so a wrench is needed to ensure accurate and convenient tightening.

[0061] In some embodiments of this application, the number of positioning holes 44 is 23 and the number of positioning grooves 53 is 11.

[0062] After setting the number of positioning holes 44 and positioning grooves 53 to 23 and 11 respectively, these two numbers have no other common divisor except 1. When the flower nut 5 rotates in front of the directional sleeve 4, the number of times their positioning grooves 53 and positioning holes 44 overlap in 360 degrees of the circumference is 11×23=253 times. That is to say, no matter how it rotates or moves, there is a very high probability that the positioning hole 44 will overlap with the positioning groove 53, which facilitates the installation of the locking pin 6.

[0063] To further illustrate this invention, the specific methods for installing and disassembling this solution are now described in detail:

[0064] First, the connecting part 100 is fitted onto the connecting bolt 1. Then, the positioning nut 2 is tightened onto the bolt rod 12 by thread. To prevent loosening, the toothed sleeve 3 is fitted onto the positioning nut 2. Since the shape of the first connecting hole 31 inside the toothed sleeve 3 matches the shape of the positioning nut 2, the toothed sleeve 3 can be directly installed onto the positioning nut 2 without easily rotating. Next, the directional sleeve 4 is fitted onto the threaded rod by the cooperation of the protrusion 42 and the groove 13. Since the toothed sleeve 3 is provided with the first serration 32 and the directional sleeve 4 is provided with the second serration 43, the first serration 32 and the second serration 43 mesh. When installing the directional sleeve 4, the toothed sleeve 3 is tightened in the tight direction and kept in the tightened state. The directional sleeve 4 is tightened in the loose direction and kept in the tightened state. Then, the directional sleeve 4 is pushed onto the toothed sleeve 3 for meshing. Carefully observe whether the meshing degree between the first saw tooth 32 and the second saw tooth 43 is between 40% and 99%. If it is not between 40% and 99%, disassemble the directional sleeve 4 and reinstall it until the meshing degree between the first saw tooth 32 and the second saw tooth 43 is between 40% and 99%. Also, keep the directional sleeve 4 pushed towards the tooth sleeve 3 without letting it loosen. Then, tighten the nut 5 onto the bolt rod 12 by thread until the nut 5 abuts against the guide sleeve 4 and transmits a force to the toothed sleeve 3. While installing the nut 5, push the guide sleeve 4 with your hand to prevent it from disengaging from the toothed sleeve 3. Tighten the nut 5 by hand before loosening it. Finally, when the nut 5 is tightened, observe the positional relationship between the positioning hole 44 and the positioning groove 53. Find a position where they are directly opposite each other, or a position that does not affect the insertion of the locking pin 6. Then insert the locking pin 6. It is recommended to insert it into the narrowest hole in the tightening direction. Use a wrench (a socket wrench is recommended for easier use) to rotate the nut 5 in the loosening direction until the side wall of the limiting groove 533 abuts against the exposed part of the locking pin body 61. At this time, the locking pin body 61 is partially located in the limiting groove 533, and the locking pin connector 62 is located in the second positioning groove 532. This indicates that the nut 5, guide sleeve 4, and locking pin 6 have abutted against each other, and the installation operation is complete.

[0065] During disassembly, tighten the flower nut 5 in the tightening direction. If it cannot be tightened, loosen it in the loosening direction (or tighten the flower nut 5 to a suitable position and then remove the locking pin 6). Use light force to avoid damaging the parts. Note that you should only loosen it in the loosening direction and not move it to prevent it from pressing against the locking pin 6 in the opposite direction. Then remove the locking pin 6, rotate and remove the flower nut 5, the directional sleeve 4, the toothed sleeve 3, the positioning nut 2, and the connecting bolt 1.

[0066] A small recess is provided inside the circle of the flower nut 5 facing the directional sleeve 4. This is designed to ensure that even when the locking pin 6 swings at its maximum amplitude, the limiting block 52 of the flower nut 5 can block the locking pin body 61, thus preventing the locking pin 6 from falling out. To ensure this goal is achieved, the rotation distance of the flower nut 5 is set to be relatively long. At the same time, it is also necessary to ensure that the flower nut 5 still has sufficient residual tightening force after it is pressed against the locking pin body 61 within this long rotation distance, while also preventing the locking pin 6 from swinging and making noise. Therefore, the inward recess of the flower nut 5 facing the directional sleeve 4 is designed to achieve these functions.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-ratio composite nut structure, characterized in that, include: A connecting bolt includes a bolt head and a bolt shank, wherein the bolt shank is provided with threads and two grooves, the grooves being arranged along the axial direction of the bolt shank; A positioning nut has internal threads and is threaded to the bolt rod. The positioning nut is used to fix the connected part between the positioning nut and the bolt head. A toothed sleeve has a first connecting hole inside, the shape of which matches the shape of the positioning nut. The toothed sleeve is fitted onto the positioning nut, and a first serration is provided on the side of the toothed sleeve away from the bolt head. The directional sleeve has a second connecting hole inside, and two protrusions are provided in the second connecting hole. The protrusions match the groove. The shape of the second connecting hole matches the bolt rod. The directional sleeve is sleeved on the bolt rod. The side of the directional sleeve near the bolt head is provided with a second serration. The first serration meshes with the second serration. The side of the directional sleeve away from the bolt head is provided with several positioning holes. The flower nut has a third connecting hole inside, and the third connecting hole has a thread. The flower nut is threaded to the bolt rod. The flower nut has a limiting block on the side near the bolt head. The limiting block has a positioning groove, which includes a first positioning groove, a second positioning groove, and a limiting groove. The flower nut has a fastening block on the side away from the bolt head. A locking pin, which is installed in the positioning hole; The positioning nut, toothed sleeve, directional sleeve, and flower nut are sequentially fitted onto the bolt rod; Both the first positioning groove and the second positioning groove penetrate the limiting block. The limiting groove is located on the side away from the fastening block, and the limiting groove and the second positioning groove are connected vertically. The locking pin includes a locking pin body and a locking pin connector. The locking pin body is disposed in the positioning hole and the limiting groove, and the locking pin connector is disposed in the second positioning groove. The sum of the width of the first positioning groove and the width of the portion of the second positioning groove that can accommodate the locking pin body is greater than the diameter of the locking pin body, and the width of the second positioning groove is less than the diameter of the locking pin body.

2. The high-ratio combined nut structure according to claim 1, characterized in that, The positioning nut is an external hexagonal nut.

3. The high-ratio combined nut structure according to claim 1, characterized in that, The meshing degree between the first saw tooth and the second saw tooth is 40%-99%.

4. The high-ratio combined nut structure according to claim 1, characterized in that, The cross-sectional diameter of the flower nut is smaller than the cross-sectional diameter of the directional sleeve.

5. The high-ratio combined nut structure according to claim 1, characterized in that, The depth of the positioning hole is less than the length of the locking pin body, and the depth of the limiting groove is the difference between the length of the locking pin body and the depth of the positioning hole.

6. The high-ratio combined nut structure according to claim 1, characterized in that, The fastening block is hexagonal in shape.

7. The high-ratio combined nut structure according to claim 1, characterized in that, The number of positioning holes is 23, and the number of positioning slots is 11.

Images