Novel optical fiber twisting device

Abstract

The invention relates to the technical field of optical fiber production, and discloses a novel optical fiber twisting device which comprises a twisting wheel, an optical fiber is embedded in the surface of the twisting wheel, a bottom plate is arranged at the bottom, and a first motor base is installed on the surface of the bottom plate; the swing motor is arranged on the surface of the first motor base, a rubbing wheel frame is installed at the output end, and a bearing is arranged on the inner wall of the rubbing wheel frame. A rotating motor is installed on the surface of the bottom plate, and the output end is connected with a wheel shaft through a magnetic coupler. The rotating motor drives the wheel shaft to operate to drive the rubbing wheel to rotate, so that the optical fiber is uniformly rubbed, and extra acting force on an optical fiber coating is reduced; the swing motor drives the rubbing wheel frame and the rotating rubbing wheel to swing back and forth together, and the swing angle is adjusted to enable the two inner sides of the rubbing wheel groove to just form enough friction on the optical fiber, so that the optical fiber is twisted back and forth; the rotation speed of the rubbing wheel is adjusted to realize the twisting speed of the optical fiber and improve the PMD of the optical fiber; in the twisting process of the optical fiber, the twisting wheel does not extrude the optical fiber, and damage to the coating of the optical fiber is avoided.

Description

Technical Field

[0001] This invention relates to the field of optical fiber production technology, specifically to a novel optical fiber twisting device. Background Technology

[0002] With the widespread application of optical fiber communication, the requirements for communication quality are becoming increasingly stringent. Among these requirements, polarization mode dispersion (PMD, which will be abbreviated as PMD in the following description) is an important parameter. How to effectively improve PMD is an important issue in the optical fiber production process.

[0003] Currently, the main method for improving the PMD (partial displacement tolerance) parameters of optical fibers during the fiber drawing process is the use of fiber twisting devices. There are three main types of widely used fiber twisting devices: The first type uses a pair of rubber wheels to squeeze the fiber in the middle and rotate it back and forth to twist it. However, this method either results in excessive pressure damaging the fiber coating or insufficient pressure leading to inadequate twisting. The second type uses a pair of metal wheels to squeeze the fiber in the middle and rotate it back and forth in opposite directions to twist it. The biggest problem with this method is that it easily causes pressure damage to the fiber coating. The third type uses a V-shaped wheel that rotates back and forth, causing two conical surfaces to rub against the fiber and twist it. However, the V-shaped wheel is passively rotated by the fiber and cannot actively adjust the twisting. This invention, through optimized structural design and rotation control of the twisting wheels, achieves both effective fiber twisting and avoids pressure damage to the fiber coating, thus balancing the improvement of PMD and the maintenance of mechanical strength. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a novel fiber twisting device to solve the problem mentioned in the background art of difficulty in simultaneously improving fiber PMD and meeting the requirements for fiber coating protection and precise adjustment of the twisting helix angle.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel optical fiber twisting device, comprising: The rubbing wheel has an optical fiber embedded in its groove, a base plate at its bottom, and a first motor mount on the upper surface of the base plate. A swing motor is mounted on the upper surface of the first motor base. A rubbing wheel frame is installed at the output end of the swing motor, and a bearing is installed in the inner hole of the rubbing wheel frame. The second motor base is located on the upper surface of the base plate. A rotary motor is mounted on the upper surface of the second motor base. A magnetic coupling is installed at the output end of the rotary motor. A wheel shaft is installed in the inner hole of the magnetic coupling. The wheel shaft passes through the rubbing wheel with an interference fit and then passes into the inner ring of the bearing.

[0006] Preferably, a pressure plate is mounted on the surface of the roller frame, and a threaded rod is screwed between the pressure plate and the roller frame; The core purpose of the pressure plate is to provide auxiliary fixation and positional constraint for key components inside the fiber twisting frame, preventing axial or radial displacement of the twisting roller during high-speed rotation or oscillation with the frame. Since the twisting roller continuously drives the optical fiber to complete the twisting action, the precision of its fit with the axle and bearings directly affects the fiber processing quality. The pressure plate, by adhering to the end face of the twisting roller, forms stable lateral support, preventing the roller from shifting due to uneven force. The threaded rod that mates with it uses a screw-in structure, allowing adjustment of the pressure plate's clamping force by rotating clockwise or counterclockwise. When changing to different specifications of twisting rollers, the threaded rod can be loosened to increase the gap between the pressure plate and the roller, facilitating disassembly and installation. When the device is in operation, the threaded rod is gradually tightened to apply appropriate pressure to the roller, avoiding excessive tightening that could cause wear on the roller surface while ensuring synchronous rotation of the roller and axle.

[0007] Preferably, the upper surface of the second motor base is provided with a slot, and a first bolt is screwed into the inside of the slot; The combination of the slot and the first bolt is primarily designed to allow for adjustable positioning of the second motor mount on the base plate, adapting to the transmission requirements of the device under different operating conditions. Since the second motor mount supports the rotary motor, which is connected to the axle via a magnetic coupling, the magnetic coupling ensures that the rotational motion of the rotary motor can still be transmitted to the rolling wheel even when the rolling wheel wobbles (i.e., when the axes at both ends are not aligned), without affecting transmission efficiency or causing noise. The slot uses a long, narrow structure, allowing the first bolt to move along the length of the slot before it is fully tightened, thereby adjusting the position of the second motor mount until the magnetic coupling clearance is appropriate (transmitting torque without interference). Once the position is adjusted, the first bolt is tightened. The pressure between the bolt head and the surface of the second motor mount, as well as the friction between the bolt shank and the inner wall of the slot, firmly fixes the second motor mount to the base plate, preventing displacement during the operation of the rotary motor. Compared to the traditional fixed round hole design, the slot design eliminates the need for multiple positioning holes on the base plate, reducing processing steps and structural damage to the base plate.

[0008] Preferably, a second bolt is screwed onto the upper surface of the first motor base, and the second bolt passes through the first motor base and is screwed onto the surface of the base plate; When the oscillating motor needs maintenance or replacement, simply removing the second bolt allows the first motor mount and the oscillating motor to be removed as a whole, eliminating the need for destructive operations on the base plate and improving maintenance efficiency. In actual operation, the oscillating motor frequently reciprocates, generating periodic lateral forces. The second bolt, through its threaded locking force, resists these lateral forces, preventing the first motor mount from sliding on the base plate. This ensures that the output of the oscillating motor can always precisely drive the twisting roller frame, providing stable and uniform twisting motion for the optical fiber.

[0009] Preferably, a mounting plate is installed on the upper surface of the first motor base, the swing motor is in close contact with the surface of the mounting plate, and threaded holes are provided at the four corners of the surface of the mounting plate; The mounting plate is primarily designed to optimize the connection and compatibility between the oscillating motor and the first motor mount, while also improving the flatness of the oscillating motor's mounting surface. Since the dimensions of the bases for different oscillating motor models may vary, directly mounting the motor onto the first motor mount may result in mismatches or poor flatness. The mounting plate serves as an intermediate transition component, its structural design adapting to the connection requirements of the motor and the motor mount. The mounting plate and the first motor mount can be connected by welding or bolting. Its surface is precision-machined to ensure high flatness. When the oscillating motor and the mounting plate are in close contact, it prevents uneven stress on the motor mount due to uneven contact surfaces, thus preventing additional vibration during motor operation.

[0010] Preferably, a third bolt is screwed onto the surface of each threaded hole, and the third bolt passes through the threaded hole and is screwed onto the surface of the oscillating motor; The third bolt, as the core component connecting the mounting plate and the oscillating motor, securely fixes the oscillating motor to the mounting plate through threaded locking force, ensuring no relative displacement between the two during operation. Because the oscillating motor generates high-frequency reciprocating oscillations during operation, if the connection between the motor and the mounting plate becomes loose, the clearance between the connecting shaft at the motor output end and the mating hole of the fiber twisting frame will increase, leading to a decrease in the oscillation accuracy of the fiber twisting frame and affecting the twisting quality of the optical fiber. The third bolt adopts a structure that passes through a threaded hole and is screwed onto the surface of the oscillating motor. Compared to fixing only through surface pressure, the threaded connection provides stronger resistance to loosening, effectively resisting the lateral forces generated by the oscillating motor even under long-term vibration environments, preventing the bolt from loosening.

[0011] Preferably, the output end of the swing motor is equipped with a connecting shaft, and the surface of the roller frame is provided with a mating hole, into which the connecting shaft is inserted; The connection between the connecting shaft and the mating hole is the core structure for transmitting power from the oscillating motor to the twisting roller frame. Its design directly determines the efficiency and accuracy of the oscillating motion transmission. As an extension component of the oscillating motor's output end, the connecting shaft must maintain coaxiality with the motor's output shaft to ensure that the motor's oscillating power is transmitted to the connecting shaft without deviation. The mating hole is opened on the surface of the twisting roller frame, and its diameter must precisely match the outer diameter of the connecting shaft to reduce the gap when the two are mated. If the gap is too large, the connecting shaft will wobble in the mating hole, causing the oscillation angle of the twisting roller frame to be inconsistent with the motor's preset angle, affecting the twisting accuracy of the optical fiber. If the gap is too small, it will increase the difficulty of installation and may cause jamming due to thermal expansion and contraction of components, affecting the normal operation of the device.

[0012] Preferably, the surface of the rubbing wheel frame is provided with a groove, the groove is connected to the interior of the docking hole, and an adjusting rod is screwed onto the upper surface of the rubbing wheel frame; The combination of the slot and adjusting rod is designed to fine-tune the diameter of the mating hole to match the installation and fitting precision of the connecting shaft, while also facilitating subsequent maintenance and disassembly. Because the fitting precision requirements between the connecting shaft and the mating hole are high, long-term use may lead to increased gaps due to wear, or a slight mismatch between the hole diameter and shaft diameter may occur when installing a new connecting shaft. In such cases, the slot allows the mating hole to have a certain degree of elastic deformation capability. The slot divides the area of ​​the roller frame corresponding to the mating hole into slightly deformable elastic flaps. By adjusting the adjusting rod, the opening degree of the elastic flaps can be changed, thereby adjusting the actual diameter of the mating hole. The adjusting rod is screwed onto the upper surface of the roller frame, with its lower end extending into the slot. When the adjusting rod is rotated clockwise, it applies pressure to the elastic flaps on both sides of the slot, causing the flaps to move towards the center, reducing the diameter of the mating hole until it fits tightly against the connecting shaft.

[0013] Preferably, the surface of the roller frame is provided with mounting holes, and the axle passes through the mounting holes and is connected to the roller; The mounting holes provide stable support and a positioning channel for the axle, ensuring it maintains a precise axial position when driving the tufting roller, and simultaneously enabling coordinated movement between the axle and the tufting roller frame. As the core transmission component connecting the rotary motor and the tufting roller, the axle must withstand both the torque transmitted by the motor and the radial force of the tufting roller during operation. Without stable support, the axle is prone to bending or vibration, leading to decreased rotational accuracy of the tufting roller and affecting the twisting quality of the optical fiber. The mounting holes are located on the surface of the tufting roller frame, with their axes aligned with the tufting roller's axis. The axle passes through the mounting holes and connects to the tufting roller. At this point, the mounting holes provide radial support to the axle, limiting its radial displacement and ensuring it always rotates around the preset axis. To improve support stability, the inner wall of the mounting holes is typically precision-machined to reduce surface roughness and frictional resistance during axle rotation.

[0014] Preferably, an elastic washer is provided between the roller and the bearing, and the elastic washer is sleeved on the surface of the roller axle; The elastic shims are primarily used to buffer vibration and impact between the rubbing roller and the bearing, compensate for the installation gap between them, and prevent wear caused by rigid contact, thus extending the service life of the device. During operation, the rubbing roller rotates at high speed driven by a rotary motor and oscillates back and forth with the rubbing roller frame. This combined motion easily leads to periodic impacts and friction between the rubbing roller and the bearing. If they are in direct rigid contact, long-term use will cause wear on the end face of the rubbing roller or the outer ring of the bearing, affecting the fitting accuracy and subsequently causing axle vibration, reducing the twisting quality of the optical fiber. The elastic shims, made of materials with a certain degree of elasticity and wear resistance, are fitted onto the axle surface between the rubbing roller and the bearing. Their elastic properties absorb vibration energy between them, reducing impact transmission and making the rotation of the rubbing roller smoother.

[0015] Compared with the prior art, the present invention provides a novel optical fiber twisting device, which has the following beneficial effects: This novel fiber optic twisting device incorporates a rotary motor that drives a wheel shaft via a magnetic coupling, thereby rotating the twisting wheel. As the twisting wheel rotates, the fiber embedded in its groove experiences uniform twisting action from both inner sides of the groove, adjusting the internal polarization state distribution and improving the fiber's polarization distortion (PMD). Bearings ensure precise centering and stable rotation of the twisting wheel, preventing any compression damage to the fiber coating during the twisting process. Furthermore, a swing motor drives the twisting wheel frame and the rotating wheel to swing back and forth, with the swing angle adjusted to create sufficient friction between the inner sides of the groove, causing the fiber to twist repeatedly. Adjusting the rotation speed of the twisting wheel controls the twisting rate, i.e., the twist angle, thus improving the fiber's PMD. During the twisting process, the twisting wheel does not compress the fiber, avoiding damage to the fiber coating. Ultimately, through the synergistic effect of these structures, the device achieves the combined benefits of improving PMD, eliminating compression on the fiber coating, and adjusting the twisting helix angle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention viewed from the left. Figure 4 This is a schematic diagram of the installation structure of the rubbing wheel of the present invention; Figure 5 This is a schematic diagram of the structure of the roller frame of the present invention; Figure 6 This is a schematic diagram of the counterclockwise twisted optical fiber structure of the present invention; Figure 7 This is a schematic diagram of the non-rotating twisted optical fiber structure of the present invention; Figure 8This is a schematic diagram of the clockwise twisted optical fiber structure of the present invention; Figure 9 This is a schematic diagram of the structure of the present invention, in which the bottom of the rubbing wheel groove is tangent to the optical fiber and then pushed.

[0017] In the diagram: 1. Rubbing wheel; 2. Rubbing wheel frame; 3. Swing motor; 4. First motor base; 5. Base plate; 6. Rotary motor; 7. Second motor base; 8. Magnetic coupling; 9. Optical fiber; 10. Elastic washer; 11. Bearing; 12. Axle; 13. Pressure plate; 14. Slot; 141. First bolt; 15. Second bolt; 16. Mounting plate; 17. Threaded hole; 18. Third bolt; 19. Connecting shaft; 20. Butt hole; 21. Slot; 22. Adjusting rod; 23. Mounting hole; 24. Threaded rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a technical solution, a novel optical fiber twisting device. Please refer to [link / reference]. Figure 1 It includes a rubbing wheel 1, with an optical fiber 9 embedded in the groove of the rubbing wheel 1, a base plate 5 at the bottom of the rubbing wheel 1, and a first motor base 4 installed on the upper surface of the base plate 5. The swing motor 3 is set on the upper surface of the first motor base 4. The output end of the swing motor 3 is equipped with a rubbing wheel frame 2, and the inner hole of the rubbing wheel frame 2 is equipped with a bearing 11. The second motor base 7 is disposed on the upper surface of the base plate 5. A rotary motor 6 is mounted on the upper surface of the second motor base 7, and a magnetic coupling 8 is mounted on the output end of the rotary motor 6. Please refer to [link / reference]. Figure 4 The inner hole of the magnetic coupling 8 is fitted with a wheel shaft 12, which passes through the roller 1 with an interference fit and then passes into the inner ring of the bearing 11.

[0020] The rotary motor 6 on the second motor base 7 can drive the axle 12 to rotate via the magnetic coupling 8. The axle 12 passes through the rubbing wheel 1 and is connected to the inner ring of the bearing 11 on the inner wall of the rubbing wheel frame 2, so that the axle 12 can stably drive the rubbing wheel 1 to rotate. When the optical fiber 9 embedded in the groove of the rubbing wheel 1 rotates with the rubbing wheel 1, it will be subjected to uniform twisting action. This stable twisting action can adjust the internal polarization state distribution of the optical fiber 9, thereby improving the PMD of the optical fiber 9. At the same time, the optical fiber 9 is set by embedding in the groove of the rubbing wheel 1, which avoids the direct compression of the coating of the optical fiber 9 by the traditional clamping structure, and the bearing 11 ensures that the rubbing wheel 1 The coaxiality during rotation reduces the additional force exerted on the coating of optical fiber 9 during the operation of the rubbing wheel 1, thereby eliminating the squeezing of the coating of optical fiber 9; in addition, the swing motor 3 drives the rubbing wheel frame 2 and the rotating rubbing wheel 1 to swing back and forth together, and the swing angle is adjusted so that the two inner sides of the groove of the rubbing wheel 1 just form sufficient friction on the optical fiber 9, so that the optical fiber 9 twists back and forth; the rotation speed of the rubbing wheel 1 is adjusted to realize the twisting speed of the optical fiber 9, that is, the twisting angle, so as to improve the PMD of the optical fiber 9; during the twisting process of the optical fiber 9, the rubbing wheel 1 does not squeeze the optical fiber 9, thereby avoiding damage to the coating of the optical fiber 9.

[0021] The optical fiber 9 is located in the center of the groove bottom of the rubbing wheel 1. The bottom of the groove wheel is tangent to the optical fiber 9. Pushing the optical fiber 9 by 1-2mm is a reference value. The specific amount of pushing can be determined by the effect of use.

[0022] Please see Figure 6-9 The diagram shows three states during the twisting process of optical fiber 9: clockwise, counterclockwise, and no rotation. Please see Figure 6 The rubbing wheel 1 swings to the right and rubs against the upper left edge of the inner side of the groove and against the fiber 9. The groove wheel rotates in the direction shown in the figure. At the same time, the linear velocity of the bottom surface of the groove wheel forms an angle friction with the pulling direction of the fiber 9. All three frictions cause the fiber 9 to rotate counterclockwise.

[0023] Please see Figure 7 The rubbing wheel 1 has no deflection angle, and the linear velocity of the bottom surface of the groove of the rubbing wheel 1 is consistent with the velocity of the optical fiber 9, so the optical fiber 9 does not rotate.

[0024] Please see Figure 8 ,and Figure 6 The state is reversed, and fiber optic 9 rotates clockwise.

[0025] Please see Figure 9 The display shows the reference value where the bottom of the groove of the rubbing roller 1 is tangent to the optical fiber 9 and then pushed 1-2mm further.

[0026] The rubbing wheel 1 rotates continuously and oscillates back and forth, causing the optical fiber to rotate back and forth through friction, thereby achieving the effect of twisting the optical fiber 9 and improving the PMD of the optical fiber 9. During this process, there is no squeezing of the optical fiber 9. The twisting helix angle of the optical fiber 9 can be adjusted by the rotation speed of the rubbing wheel 1, and the higher the rotation speed of the rotating motor 6, the greater the twist angle of the optical fiber 9.

[0027] A pressure plate 13 is mounted on the surface of the rubbing wheel frame 2, and a threaded rod 24 is screwed between the pressure plate 13 and the rubbing wheel frame 2. Please see Figure 5 The core purpose of the pressure plate 13 is to provide auxiliary fixation and positional constraint for key components inside the roller frame 2, preventing axial or radial displacement of the roller 1 during high-speed rotation or swinging with the roller frame 2. Since the roller 1 needs to continuously drive the optical fiber 9 to complete the twisting action, the fitting accuracy between it and the axle 12 and bearing 11 directly affects the processing quality of the optical fiber 9. The pressure plate 13, by fitting against the end face of the roller 1, forms a stable lateral support, preventing the roller 1 from shifting due to uneven force. The threaded rod 24, which cooperates with it, adopts a screw-on structure, allowing adjustment of the pressure plate 13's clamping force by rotating clockwise or counterclockwise. When it is necessary to replace rollers 1 of different specifications, the threaded rod 24 can be loosened to increase the gap between the pressure plate 13 and the roller 1, facilitating the disassembly and installation of the roller 1. When the device is in working condition, the threaded rod 24 is gradually tightened to apply appropriate pressure to the roller 1, avoiding excessive clamping that could cause wear on the roller 1 surface, while ensuring synchronous rotation of the roller 1 and the axle 12.

[0028] Please see Figure 1 The upper surface of the second motor base 7 is provided with a slot 14, and a first bolt 141 is screwed into the inside of the slot 14; The combination of slot 14 and first bolt 141 is mainly used to make the position of the second motor base 7 on the base plate 5 adjustable to adapt to the transmission requirements of the device under different working conditions. Since the second motor base 7 carries the rotary motor 6, and the rotary motor 6 transmits the rotational motion to the axle 12 and the rolling wheel 1 through the magnetic coupling 8, the magnetic coupling 8 can ensure that the rotational motion of the rotary motor 6 can still be transmitted to the rolling wheel 1 even when the rolling wheel 1 is wobbly (i.e., when the axes at both ends are not concentric), without affecting the transmission efficiency and without noise. The slot 14 adopts a long strip structure, which allows the first bolt 141 to move along the length of the slot 14 when it is not fully tightened, thereby driving the second motor base 7 to adjust its position as a whole until the clearance of the magnetic coupling 8 is appropriate (transmitting torque without interference). After the position is adjusted, the first bolt 141 is tightened. The pressure between the bolt head and the surface of the second motor base 7, as well as the friction between the bolt shank and the inner wall of the slot 14, firmly fix the second motor base 7 on the base plate 5 to prevent it from shifting during the operation of the rotary motor 6. Compared to the traditional fixed round hole design, the advantage of the slot 14 is that it eliminates the need to open multiple positioning holes on the base plate 5, reducing the processing steps and structural damage to the base plate 5.

[0029] Please see Figure 4 A second bolt 15 is screwed onto the upper surface of the first motor base 4, and the second bolt 15 passes through the first motor base 4 and is screwed onto the surface of the base plate 5. When the swing motor 3 needs to be inspected or replaced, the first motor base 4 and the swing motor 3 can be removed as a whole simply by removing the second bolt 15, without any destructive operation on the base plate 5, thus improving maintenance efficiency. In actual operation, the swing motor 3 will frequently swing back and forth, generating periodic lateral forces. The second bolt 15 can resist these lateral forces through its own thread locking force, preventing the first motor base 4 from sliding on the base plate 5, and ensuring that the output end of the swing motor 3 can always accurately drive the rubbing roller frame 2 to move, providing stable and uniform rubbing motion for the optical fiber 9.

[0030] Please see Figure 3 A mounting plate 16 is installed on the upper surface of the first motor base 4. The swing motor 3 is in close contact with the surface of the mounting plate 16. Threaded holes 17 are opened at the four corners of the surface of the mounting plate 16. The mounting plate 16 is primarily designed to optimize the connection and compatibility between the swing motor 3 and the first motor base 4, while also improving the flatness of the swing motor 3's mounting surface. Since the base dimensions of different models of swing motor 3 may vary, directly mounting the motor onto the first motor base 4 could result in mismatches or poor flatness. The mounting plate 16 serves as an intermediate transition component, its structural design adapting to the connection requirements of the motor and the motor base. The mounting plate 16 and the first motor base 4 can be connected by welding or bolting. Its surface is precision-machined to ensure high flatness. When the swing motor 3 and the mounting plate 16 are in close contact, uneven force on the motor base due to uneven contact surfaces is avoided, thus preventing additional vibration during motor operation.

[0031] Please see Figure 4 Each of the threaded holes 17 is screwed with a third bolt 18, and each of the third bolts 18 passes through the threaded holes 17 and is screwed onto the surface of the swing motor 3. The third bolt 18, as the core component connecting the mounting plate 16 and the oscillating motor 3, securely fixes the oscillating motor 3 to the mounting plate 16 through threaded locking force, ensuring no relative displacement between the two during operation. Since the oscillating motor 3 generates high-frequency reciprocating oscillations during operation, if the connection between the motor and the mounting plate 16 becomes loose, the clearance between the connecting shaft 19 at the motor output end and the mating hole 20 of the rolling wheel frame 2 will increase, leading to a decrease in the oscillation accuracy of the rolling wheel frame 2 and affecting the twisting quality of the optical fiber 9. The third bolt 18 adopts a structure that penetrates the threaded hole 17 and is screwed onto the surface of the oscillating motor 3. Compared to fixing only through surface pressure, the threaded connection provides stronger resistance to loosening, effectively resisting the lateral force generated by the oscillating motor 3 even under long-term vibration conditions, preventing the bolt from loosening.

[0032] A connecting shaft 19 is installed at the output end of the swing motor 3, and a mating hole 20 is opened on the surface of the rubbing wheel frame 2, into which the connecting shaft 19 is inserted; The connection between the connecting shaft 19 and the mating hole 20 is the core structure for transmitting power from the oscillating motor 3 to the rubbing wheel frame 2. Its design directly determines the transmission efficiency and accuracy of the oscillating motion. As an extension component of the output end of the oscillating motor 3, the connecting shaft 19 needs to maintain coaxiality with the motor output shaft to ensure that the oscillating power of the motor can be transmitted to the connecting shaft 19 without deviation. The mating hole 20 is opened on the surface of the rubbing wheel frame 2, and its diameter needs to be precisely matched with the outer diameter of the connecting shaft 19 to reduce the gap when the two are mated. If the gap is too large, the connecting shaft 19 will wobble in the mating hole 20, causing the oscillation angle of the rubbing wheel frame 2 to be inconsistent with the preset angle of the motor, affecting the twisting accuracy of the optical fiber 9. If the gap is too small, it will increase the installation difficulty and may cause jamming due to thermal expansion and contraction of the components, affecting the normal operation of the device.

[0033] Please see Figure 5The surface of the rubbing wheel frame 2 is provided with a slot 21, which communicates with the interior of the docking hole 20. An adjusting rod 22 is screwed onto the upper surface of the rubbing wheel frame 2. The core design of the combination of slot 21 and adjusting rod 22 is to adjust the perpendicularity of the axis of the rubbing roller 1 to the optical fiber 9. When the rubbing roller 1 is in the neutral position (i.e., without wobbling), the adjusting rod 22 is loosely connected to the mating hole 20 and the connecting shaft 19. The relative position of the rubbing roller frame 2 and the connecting shaft 19 is adjusted so that the side of the rubbing roller 1 is parallel to the optical fiber 9 (i.e., the axis of the rubbing roller 1 is perpendicular to the optical fiber 9). Then the adjusting rod 22 is tightened to make the mating hole 20 fit tightly with the connecting shaft 19.

[0034] The surface of the rubbing wheel frame 2 is provided with mounting holes 23, and the wheel axle 12 passes through the mounting holes 23 and is connected to the rubbing wheel 1. The mounting hole 23 provides a stable support and positioning channel for the axle 12, ensuring that the axle 12 maintains a precise axial position when driving the rubbing wheel 1 to rotate, while simultaneously achieving coordinated movement between the axle 12 and the rubbing wheel frame 2. As the core transmission component connecting the rotary motor 6 and the rubbing wheel 1, the axle 12 must simultaneously withstand the torque transmitted by the rotary motor 6 and the radial force of the rubbing wheel 1 during operation. Without stable support, the axle 12 is prone to bending or vibration, leading to a decrease in the rotational accuracy of the rubbing wheel 1 and affecting the twisting quality of the optical fiber 9. The mounting hole 23 is located on the surface of the rubbing wheel frame 2, with its axis aligned with the axis of the rubbing wheel 1. The axle 12 passes through the mounting hole 23 and connects to the rubbing wheel 1. At this point, the mounting hole 23 provides radial support for the axle 12, limiting its radial displacement and ensuring that the axle 12 always rotates around the preset axis. To improve support stability, the inner wall of the mounting hole 23 is typically precision-machined to reduce surface roughness and decrease frictional resistance during the rotation of the axle 12.

[0035] Please see Figure 4 An elastic washer 10 is provided between the rolling wheel 1 and the bearing 11, and the elastic washer 10 is sleeved on the surface of the wheel axle 12; The elastic shim 10 is mainly used to prevent axial movement of the rubbing roller 1 while ensuring its flexible rotation. Excessive elasticity will hinder the flexible rotation of the rubbing roller 1, while insufficient elasticity will cause axial movement; both situations will reduce the twisting effect of the optical fiber 9. The elastic shim 10 is made of a material with certain elasticity and wear resistance. After being fitted onto the surface of the axle 12, it is located between the rubbing roller 1 and the bearing 11. Its elastic properties can absorb the vibration energy between the two, reduce impact transmission, and make the rotation of the rubbing roller 1 more stable.

[0036] In this scheme: The rotary motor 6 on the second motor base 7 starts, driving the wheel axle 12 to rotate via the magnetic coupling 8. The wheel axle 12 passes through the rubbing wheel 1 and is connected to the inner ring of the bearing 11 on the inner wall of the rubbing wheel frame 2, stably driving the rubbing wheel 1 to rotate. This causes the optical fiber 9 embedded in the groove of the rubbing wheel 1 to be uniformly twisted, adjusting the internal polarization state distribution of the optical fiber 9 to improve its PMD. At the same time, because the optical fiber 9 is embedded in the groove of the rubbing wheel 1 and the bearing 11, coaxiality is ensured, eliminating the squeezing of the coating of the optical fiber 9. The swing motor 3 on the first motor base 4 on the base plate 5 drives the rubbing wheel frame 2 to swing. The swing angle is determined by the angle when the two inner sides of the groove of the rubbing wheel 1 contact the optical fiber 9 (specifically as follows). Figure 6 , Figure 8 As shown), the spatial angle of the rubbing wheel 1 is changed, which is coordinated with the rotational motion of the rubbing wheel 1: the higher the speed of the rotary motor 6, the greater the twist angle of the optical fiber 9, and finally the precise adjustment of the degree of twisting and the twisting helix angle is achieved, thereby improving the PMD of the optical fiber 9 and avoiding the negative impact of extrusion damage to the coating of the optical fiber 9.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel optical fiber twisting device, characterized in that, include: The rubbing wheel (1) has an optical fiber (9) embedded in its groove, and a base plate (5) is provided at the bottom of the rubbing wheel (1). A first motor base (4) is installed on the upper surface of the base plate (5). A swing motor (3) is set on the upper surface of the first motor base (4). The output end of the swing motor (3) is equipped with a rubbing wheel frame (2), and a bearing (11) is installed in the inner hole of the rubbing wheel frame (2). The second motor base (7) is located on the upper surface of the base plate (5). A rotary motor (6) is installed on the upper surface of the second motor base (7). A magnetic coupling (8) is installed at the output end of the rotary motor (6). A wheel shaft (12) is installed in the inner hole of the magnetic coupling (8). The wheel shaft (12) passes through the rolling wheel (1) with an interference fit and then passes into the inner ring of the bearing (11).

2. The novel optical fiber twisting device according to claim 1, characterized in that: A pressure plate (13) is installed on the surface of the roller frame (2), and a threaded rod (24) is screwed between the pressure plate (13) and the roller frame (2).

3. The novel optical fiber twisting device according to claim 1, characterized in that: The upper surface of the second motor base (7) is provided with a slot (14), and a first bolt (141) is screwed into the inside of the slot (14).

4. The novel optical fiber twisting device according to claim 1, characterized in that: A second bolt (15) is screwed onto the upper surface of the first motor base (4), and the second bolt (15) passes through the first motor base (4) and is screwed onto the surface of the base plate (5).

5. The novel optical fiber twisting device according to claim 1, characterized in that: The upper surface of the first motor base (4) is equipped with a mounting plate (16), the swing motor (3) is in close contact with the surface of the mounting plate (16), and threaded holes (17) are provided at the four corners of the surface of the mounting plate (16).

6. A novel optical fiber twisting device according to claim 5, characterized in that: The surface of each threaded hole (17) is screwed with a third bolt (18), and the third bolt (18) passes through the threaded hole (17) and is screwed onto the surface of the swing motor (3).

7. A novel optical fiber twisting device according to claim 1, characterized in that: The output end of the swing motor (3) is equipped with a connecting shaft (19), and the surface of the rubbing wheel frame (2) is provided with a docking hole (20), and the connecting shaft (19) is inserted into the interior of the docking hole (20).

8. A novel optical fiber twisting device according to claim 7, characterized in that: The surface of the rubbing wheel frame (2) is provided with a groove (21), which communicates with the interior of the docking hole (20). An adjusting rod (22) is screwed onto the upper surface of the rubbing wheel frame (2).

9. A novel optical fiber twisting device according to claim 1, characterized in that: The surface of the rubbing wheel frame (2) is provided with mounting holes (23), and the wheel axle (12) passes through the mounting holes (23) and is connected to the rubbing wheel (1).

10. A novel optical fiber twisting device according to claim 1, characterized in that: An elastic washer (10) is provided between the roller (1) and the bearing (11), and the elastic washer (10) is sleeved on the surface of the axle (12).

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