A thread nut assembly

Abstract

The application relates to the technical field of mechanical transmission, in particular to a screw nut assembly which comprises a first screw nut, a second screw nut and a screw rod, the first screw nut and the second screw nut are both in threaded connection with the screw rod, the first screw nut is internally provided with a cavity, and the second screw nut is detachably inserted into the cavity; a plurality of ear plates are outwardly extended from one end of the first screw nut close to the cavity, a plurality of axially distributed strip-shaped grooves are arranged on the ear plates, and a toothed structure is arranged on the outer surface of the second screw nut; when the second screw nut is inserted into the cavity, the toothed structure is in meshing connection with the strip-shaped grooves. The meshing connection of the strip-shaped grooves and the toothed structure and the cooperation of the threads constrain the components from the circumferential direction and the axial direction, the stability of the overall structure in the working process is enhanced, and the effect of structural loosening or displacement deviation caused by factors such as vibration and load is reduced.

Description

Technical Field

[0001] This application relates to the technical field of mechanical transmission, and in particular to a wire nut assembly. Background Technology

[0002] Society is currently in a stage of comprehensive technological development, and mechanical components are evolving with increasingly sophisticated technological structures to meet the needs of various industries and fields. The development of the machinery sector plays a crucial role in improving production efficiency, reducing costs, and enhancing product quality. With continuous technological advancements, the performance and precision requirements of mechanical components are also rising to meet the diverse needs of different industries. For example, on automated production lines, the precise movement and efficient transmission of mechanical components ensure high-quality product manufacturing; in the field of precision instrument manufacturing, the high-precision fit of mechanical components guarantees accurate measurement and stable operation of instruments.

[0003] In existing lead screw and nut assemblies, the use of a single nut can easily lead to loosening or misalignment, which can affect the transmission accuracy and stability of the equipment. Decreased accuracy can easily cause deviations, making it impossible to meet the needs of some scenarios with high displacement accuracy requirements. Utility Model Content

[0004] To address the issues of low stability and susceptibility to loosening or deviation in lead screw nuts, this application aims to provide a lead screw nut assembly. The technical solution adopted is as follows: Includes a first lead screw nut, a second lead screw nut, and a screw; Both the first lead screw nut and the second lead screw nut are threadedly connected to the screw. The first lead screw nut has a cavity inside, and the second lead screw nut is detachably inserted into the cavity; the first lead screw nut has multiple ear plates extending outward from the end near the cavity, and the ear plates have multiple axially distributed strip grooves; The outer surface of the second lead screw nut is provided with a toothed structure. When the second lead screw nut is inserted into the cavity, the toothed structure engages with the strip groove.

[0005] By adopting the above technical solution, the meshing of the strip groove and toothed structure, as well as the engagement of the thread, ensures that the two move synchronously, reducing the risk of slippage or slippage. Furthermore, it constrains the components in both the circumferential and axial directions, enhancing the stability of the overall structure during operation and reducing structural loosening or displacement deviation caused by factors such as vibration and load. At the same time, it can be detachably inserted into the cavity of the first lead screw nut, making the component easy to assemble, disassemble, and maintain.

[0006] Optionally, the internal threaded hole of the first lead screw nut is a first hole, and the cavity is a second hole. The first hole and the second hole are coaxially arranged and interconnected.

[0007] By adopting the above technical solution, the threads inside the first and second lead screw nuts are perfectly aligned to form a continuous threaded channel, allowing the lead screw to pass smoothly and without interference through the entire assembly. This not only reduces frictional resistance and wear during movement and avoids jamming caused by misalignment, but also ensures high precision and stability during transmission.

[0008] Optionally, the first lead screw nut is provided with a mounting flange at the end away from the cavity, and the mounting flange is provided with at least two mounting holes evenly distributed in the circumferential direction, and the center of the mounting flange is provided with a threaded hole communicating with the first hole.

[0009] By adopting the above technical solution, a robust and stable installation interface is provided. Multiple evenly distributed mounting holes allow the lead screw assembly to be securely and centeredly fixed to the equipment base or moving parts, effectively preventing loosening or misalignment during stress. The through-hole connecting the center of the mounting flange to the threaded hole provides unobstructed space for the passage and movement of the lead screw, ensuring the rigidity and reliability of the entire transmission system.

[0010] Optionally, the internal threaded hole of the second lead screw nut has the same size and thread specification as the first hole, and the outer surface of the second lead screw nut fits against the inner surface of the cavity.

[0011] By adopting the above technical solution, smooth force transmission and precise fit between the two nuts are achieved. Consistent thread specifications ensure uniform force distribution and smooth movement of the lead screw between the two nuts, avoiding speed fluctuations and impacts. The tight fit between the outer surface and the cavity provides stable radial support for the toothed meshing, preventing the second lead screw nut from wobbling within the cavity and ensuring meshing accuracy. It also serves to assist in positioning and distribute radial loads, thereby extending the service life of the assembly.

[0012] Optionally, the end face of the cavity that contacts the second lead screw nut is provided with a sealing structure.

[0013] By adopting the above technical solution, the dustproof and sealing performance of the component is significantly improved. This structure can effectively prevent external dust, chips and other contaminants from entering the cavity, while also preventing leakage of internal lubricating grease. It provides a clean and well-lubricated working environment for the mating surface between the second lead screw nut and the cavity, thereby reducing abnormal wear and extending the service life of the entire lead screw nut assembly. It is especially suitable for harsh industrial environments.

[0014] Optionally, the contact surfaces of the first lead screw nut and the second lead screw nut are coated with polytetrafluoroethylene to reduce friction and wear.

[0015] By adopting the above technical solutions, the motion performance and durability of the components are directly improved. Polytetrafluoroethylene (PTFE) material has an extremely low coefficient of friction and self-lubricating properties, which significantly reduces the frictional resistance and wear between the second lead screw nut and the cavity during insertion, removal, and operation. This results in smoother assembly, more stable operation, and effectively suppresses seizing caused by frictional heating, further enhancing the reliability and ease of maintenance of the components.

[0016] Optionally, the outer edge of the mounting flange is provided with radially extending reinforcing ribs.

[0017] By adopting the above technical solution, the mechanical strength and structural rigidity of the key parts of the first lead screw nut are enhanced. These reinforcing ribs can effectively disperse and resist the axial load from the lead screw and the bending stress and deformation caused by the bolt preload during installation, preventing the flange root from cracking or undergoing plastic deformation due to stress concentration, thereby ensuring the long-term structural integrity and operational stability of the assembly under heavy load or high-frequency conditions.

[0018] Optionally, the internal thread hole of the second lead screw nut has the same size and thread specification as the first hole. By adopting the above technical solution, the uniform thread direction ensures that when the lead screw rotates, the axial force acting on the first and second lead screw nuts is in the same direction, so that the two are subjected to continuous and uniform force when working as a whole, avoiding internal interference or stress concentration that may occur due to different threads, ensuring a smooth and stable transmission process, and optimizing the load distribution and power transmission efficiency of the components.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The meshing of the strip groove and toothed structure, as well as the engagement of the thread, ensures synchronous movement of both, reducing the risk of slippage or slippage. It also constrains the components in the circumferential and axial directions, enhancing the stability of the overall structure during operation and reducing structural loosening or displacement deviation caused by factors such as vibration and load. At the same time, it can be detachably inserted into the cavity of the first lead screw nut, making the component easy to assemble, disassemble, and maintain. 2. The sealing structure of the contact end face effectively isolates external contaminants, while the application of polytetrafluoroethylene coating greatly reduces friction and wear, making insertion and removal smoother and operation more stable, thus extending service life. 3. The reinforcing ribs on the outer edge of the mounting flange significantly improve the rigidity and load-bearing capacity of critical components, ensuring the structural integrity of the assembly under heavy load conditions. Furthermore, the consistent rotation direction of all threaded holes ensures that the two lead screw nuts operate in the same direction under stress, preventing internal stress concentration. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the wire mother assembly; Figure 2 This is an exploded structural diagram of the wire mother assembly; Figure 3 This is a cross-sectional structural diagram of the wire mother assembly; In the picture, 1. First lead screw nut; 11. First hole; 12. Second hole; 13. Ear plate; 2. Second lead screw nut, 21. Toothed structure; 3. Screw; 4. Install flange; 41. Install mounting holes. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0022] A wire mother assembly, as shown in the reference Figure 1 The system includes a first lead screw nut 1, a second lead screw nut 2, and a screw 3. Both the first lead screw nut 1 and the second lead screw nut 2 are threadedly connected to the screw 3. The first lead screw nut 1 has a cavity, and the second lead screw nut 2 is detachably inserted into the cavity. Multiple ear plates 13 extend outward from the end of the first lead screw nut 1 near the cavity, and each ear plate 13 has multiple axially distributed strip grooves. The outer surface of the second lead screw nut 2 has a toothed structure 21. When the second lead screw nut 2 is inserted into the cavity, the toothed structure 21 engages with the strip grooves, achieving precise transmission and structural stability. This is because when the screw 3 rotates, it can drive the first lead screw nut 1 and the second lead screw nut 2 to move axially through threaded engagement. The engagement of the toothed structure 21 with the strip grooves enables circumferential limiting and transmission connection, reducing the impact of thread clearance on transmission accuracy and enhancing structural stability.

[0023] Specifically, refer to Figure 2The first lead screw nut 1 includes an internal threaded hole and a cavity. The internal threaded hole is the first hole 11, which is characterized by an internal thread machined on its inner wall to match the external thread of the screw 3. A common trapezoidal thread or triangular thread can be used to achieve stable threaded transmission. In some special applications where extremely high transmission accuracy is required, a ball screw thread can also be used. The cavity is the second hole 12, which is characterized by a smooth inner wall and dimensions that match the outer surface of the second lead screw nut 2 to ensure smooth insertion. The inner wall of the cavity also has toothed grooves that match the toothed structure 21 on the outer surface of the second lead screw nut 2, which can be formed by machining. The first hole 11 and the second hole 12 are coaxially arranged and interconnected. This design allows the screw 3 to pass smoothly through the first lead screw nut 1, achieving stable transmission. The first lead screw nut 1 extends outward from the end near the cavity with an ear plate 13, which is usually rectangular or trapezoidal in shape. It can be made of high-strength metal materials, such as alloy steel, to ensure its strength and rigidity. The strip groove on the ear plate 13 is made by milling and other machining processes. The depth and width of the strip groove are designed according to the size of the tooth structure 21 to ensure that the two can mesh well.

[0024] Furthermore, refer to Figure 1 The first lead screw nut 1 has a mounting flange 4 at its end furthest from the cavity. The mounting flange 4 has at least two circumferentially evenly distributed mounting holes 41. A threaded hole communicating with the first hole 11 is located at the center of the mounting flange 4. The mounting flange 4 is disc-shaped, with radially extending reinforcing ribs on its outer edge. These reinforcing ribs can be triangular or trapezoidal in shape and made of the same material as the mounting flange 4. The reinforcing ribs enhance the strength and rigidity of the mounting flange 4, preventing deformation during installation and use. The mounting holes 41 are drilled and used to install bolts and other connecting parts, fixing the first lead screw nut 1 to other equipment or structures. The threaded hole at the center of the mounting flange 4 communicates with the first hole 11, and its thread specification is consistent with the first hole 11 to ensure that the screw 3 can pass through smoothly.

[0025] Specifically, refer to Figure 3 The second lead screw nut 2 includes an internal threaded hole and a toothed structure 21 on its outer surface. The internal threaded hole of the second lead screw nut 2 has the same size and thread specification as the first hole 11, and its construction characteristics are similar to those of the first hole 11, with an internal thread on the inner wall that matches the external thread of the screw 3. The toothed structure 21 on the outer surface is manufactured by processes such as gear hobbing or gear milling. The shape of the toothed structure 21 can be rectangular, trapezoidal, etc., and the material can be a wear-resistant metal material, such as stainless steel. When the second lead screw nut 2 is inserted into the cavity, the toothed structure 21 on the outer surface meshes with the slot, realizing circumferential limiting and transmission connection. The outer surface of the second lead screw nut 2 fits against the inner surface of the cavity. This design ensures the fitting accuracy between the two and reduces vibration and noise.

[0026] The screw 3 is characterized by its axial extension and threaded outer surface, the thread specification of which is compatible with the internal threads of the first lead screw nut 1 and the second lead screw nut 2. The screw 3 can be made of high-strength alloy steel to ensure its strength and rigidity. When the screw 3 rotates, through its threaded engagement with the first lead screw nut 1 and the second lead screw nut 2, it can drive them to move axially, thus converting rotational motion into axial linear motion.

[0027] Furthermore, a sealing structure is provided on the end face where the cavity contacts the second lead screw nut 2. This sealing structure prevents dust, debris, and other contaminants from entering the cavity and affecting the normal operation of the lead screw nut assembly. The sealing structure can use common sealing materials such as rubber sealing rings and sealant. Rubber sealing rings have good elasticity and sealing performance, while sealant can fill some tiny gaps and improve the sealing effect.

[0028] Furthermore, the contact surfaces of the first lead screw nut 1 and the second lead screw nut 2 are coated with polytetrafluoroethylene (PTFE). PTFE has excellent self-lubricating properties and wear resistance, which can reduce friction and wear between the first lead screw nut 1 and the second lead screw nut 2, thereby improving the service life and transmission efficiency of the lead screw assembly. The PTFE coating can be applied to the contact surface through processes such as spraying or impregnation, and the coating thickness can be adjusted according to actual usage requirements.

[0029] Furthermore, the internal thread hole of the second lead screw nut 2 is the same size and thread specification as the first hole 11. This ensures that when the screw rotates, it can simultaneously drive the first lead screw nut 1 and the second lead screw nut 2 to move axially, thus realizing the normal transmission function of the lead screw nut assembly.

[0030] The implementation principle of this embodiment is as follows: This lead screw nut assembly improves transmission accuracy and stability through the detachable insertion and connection of the first lead screw nut 1 and the second lead screw nut 2, and the rational structural design between each component. During use, the screw engages with the internal threads of the first hole 11 and the first threaded hole 21 to achieve the conversion between rotational motion and axial linear motion. The toothed structure 22 on the outer surface of the second lead screw nut 2 meshes with the strip groove on the ear plate 13 of the first lead screw nut 1, achieving circumferential limiting and transmission connection. The mounting flange 4 and reinforcing ribs ensure the installation stability of the lead screw nut assembly, while the sealing structure and polytetrafluoroethylene coating improve the service life and reliability of the lead screw nut assembly. When the lead screw nut wears, the second lead screw nut 2 can be easily removed from the cavity of the first lead screw nut 1 for replacement or adjustment, thereby ensuring the normal operation of the lead screw nut assembly and meeting the requirements of scenarios with high displacement accuracy, showing significant advantages compared to existing technologies.

[0031] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wire mother assembly, characterized in that, Includes a first lead screw nut (1), a second lead screw nut (2), and a screw (3); The first lead screw nut (1) and the second lead screw nut (2) are both threadedly connected to the screw (3); The first lead screw nut (1) has a cavity inside, and the second lead screw nut (2) is detachably inserted into the cavity; the first lead screw nut (1) has multiple ear plates (13) extending outward from one end near the cavity, and the ear plates (13) have multiple axially distributed strip grooves. The outer surface of the second lead screw nut (2) is provided with a toothed structure (21). When the second lead screw nut (2) is inserted into the cavity, the toothed structure (21) engages with the strip groove.

2. The wire mother assembly according to claim 1, characterized in that, The internal thread hole of the first lead screw nut (1) is the first hole (11), and the cavity is the second hole (12). The first hole (11) and the second hole (12) are coaxially arranged and interconnected.

3. A wire mother assembly according to claim 2, characterized in that, The first lead screw nut (1) is provided with a mounting flange (4) at the end away from the cavity. The mounting flange (4) is provided with at least two mounting holes (41) evenly distributed in the circumferential direction. The center of the mounting flange (4) is provided with a threaded hole that communicates with the first hole (11).

4. A wire mother assembly according to claim 2, characterized in that, The internal thread hole of the second lead screw nut (2) is consistent with the size and thread specification of the first hole (11), and the outer surface of the second lead screw nut (2) is in contact with the inner surface of the cavity.

5. A wire mother assembly according to claim 1, characterized in that, The end face of the cavity that contacts the second lead screw nut (2) is provided with a sealing structure.

6. A wire mother assembly according to claim 1, characterized in that, The contact surfaces of the first lead screw nut (1) and the second lead screw nut (2) are coated with polytetrafluoroethylene to reduce friction and wear.

7. A wire mother assembly according to claim 3, characterized in that, The outer edge of the mounting flange (4) is provided with radially extending reinforcing ribs.

8. A wire mother assembly according to claim 3, characterized in that, The internal thread hole of the second lead screw nut (2) is the same as the size and thread specification of the first hole (11).

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