Multi-stage coaxial mechanism for fiber optic wraparound fibers

Abstract

The application provides a multi-stage coaxial mechanism for optical fiber winding, a base frame, and a triple shaft structure on the base frame. The triple shaft structure comprises a triple shaft rotating base connected with the base frame, a driven concentric outer shaft, a driving shaft and a driven concentric inner shaft which are sequentially sleeved on the inner side of the triple shaft rotating base and can synchronously rotate. A driven unlocking mechanism is arranged on one side of the triple shaft structure and is used for switching the synchronous or independent rotating state of the driven concentric outer shaft, the driving shaft and the driven concentric inner shaft, thereby solving the problem of rotating mode switching of the optical fiber ring tool skeleton, the fiber separating disc and the optical fiber guide assembly.

Description

Technical Field

[0001] This invention relates to the field of optical fiber ring manufacturing, and in particular to a multi-stage coaxial mechanism for optical fiber winding. Background Technology

[0002] Fiber optic rings have wide applications in gyroscope inertial systems, sonar monitoring systems, and power signal sensing. Based on their precision levels, fiber optic rings can be categorized into three types from high to low: strategic-grade, inertial-grade, and navigation-grade. The core factor determining the precision of a fiber optic ring lies in the fiber length and its winding process. According to the Shupe effect, symmetrically wound fiber optic rings exhibit better all-temperature stability. The symmetrical winding process inevitably involves dividing the fiber into two halves, storing each end on a fiber distribution tray, and then alternately winding the two trays according to a specific pattern to form fiber optic rings. See CN117647269B for an automatic fiber optic ring winding mechanism. Based on these winding requirements, it is necessary to configure the rotating axes of the fiber optic ring tooling skeleton, the fiber distribution tray, and the fiber guide assembly, respectively, and arrange these three sets of rotating axes coaxially to achieve automated integration of fiber winding. Summary of the Invention

[0003] This invention provides a multi-stage coaxial mechanism for optical fiber winding, which solves the problem of switching rotation modes of optical fiber ring tooling skeleton, fiber distribution disk and optical fiber guide assembly.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a multi-level coaxial mechanism for optical fiber winding, a base frame, a triple-axis structure on the base frame, the triple-axis structure including a triple-axis rotating base connected to the base frame, and a follower concentric outer shaft, a drive shaft and a follower concentric inner shaft that can be rotated independently are sequentially sleeved on the inner side of the triple-axis rotating base. The follower concentric outer shaft, drive shaft and follower concentric inner shaft can rotate synchronously. A follower unlocking mechanism is provided on one side of the triple-axis structure. The follower unlocking mechanism is used to switch the synchronous or independent rotation state of the follower concentric outer shaft, drive shaft and follower concentric inner shaft.

[0005] In a preferred embodiment, the follow-up unlocking mechanism includes a linear drive module, a movable moving platform on the linear drive module, a pulling frame on the moving platform, an inner shaft locking mechanism at one end of the follow-up concentric inner shaft, an outer shaft locking mechanism at one end of the follow-up concentric outer shaft, and the pulling frame is used to pull the inner shaft locking mechanism and the outer shaft locking mechanism.

[0006] In a preferred embodiment, the locking mechanism includes a movable gear seat, a gear ring is sleeved on the outside of the drive shaft, the gear seat abuts against the gear ring, and the locking mechanism is provided with a pull part, which is pulled by a puller to disengage the gear seat from the gear ring.

[0007] In the preferred embodiment, a connecting sleeve is fitted at one end of the follower concentric outer shaft, a connecting block is provided at one end of the follower concentric inner shaft, a semi-circular sleeve is provided on one side of the connecting block and the connecting sleeve, a telescopic guide rod is provided inside the semi-circular sleeve, a gear seat is provided at one end of the guide rod, and a movable block is provided at the other end of the guide rod, and the pulling frame pulls the movable block.

[0008] In the preferred embodiment, the pull frame is provided with two hook-shaped structures, each hook-shaped structure having a wedge-shaped abutment surface. One end of the movable block has a cylindrical head, and the wedge-shaped abutment surface abuts against the cylindrical head. A first spring is sleeved on the outside of the guide rod, and the two ends of the first spring abut against the tooth seat and the semi-circular sleeve, respectively.

[0009] In a preferred embodiment, a motor drive assembly is provided on the base frame, a second synchronous pulley is provided at the shaft end of the motor drive assembly, a first synchronous pulley is provided at the shaft end of the drive shaft, and the first synchronous pulley and the second synchronous pulley are driven by a synchronous belt.

[0010] In the preferred embodiment, one end of the follower concentric inner shaft is provided with a snap-fit ​​sleeve. The snap-fit ​​sleeve is provided with multiple top blocks that can be extended and retracted radially along the snap-fit ​​sleeve. The top blocks are used to abut against the inner wall of the fiber optic ring tooling frame. The snap-fit ​​sleeve is also provided with an end stop sleeve, which is used to stop the side wall of the fiber optic ring tooling frame.

[0011] In a preferred embodiment, the snap-fit ​​sleeve includes a receiving sleeve, one end of which is provided with a stop shoulder. The side wall of the receiving sleeve is provided with multiple grooves along the circumference. Each top block is located in a groove. One end of the top block near the inside of the receiving sleeve is provided with a connecting rod. The end of the connecting rod is provided with a wedge-shaped block. An adjusting cylinder is provided inside the receiving sleeve. A second spring is provided inside the adjusting cylinder. A telescopic top that can slide along the axis of the receiving sleeve is also provided inside the adjusting cylinder. The two ends of the second spring abut against the telescopic top and the adjusting cylinder, respectively. The telescopic top abuts against each wedge-shaped block.

[0012] In the preferred embodiment, the receiving sleeve has a narrow diameter section at its front end, and the end sleeve is threadedly connected to the outer wall of the narrow diameter section. The end sleeve includes an adjusting ring, an L-shaped cavity inside the adjusting ring, a top bead inside the L-shaped cavity near the outer wall of the adjusting ring, a tightening block and a rear stopper inside the L-shaped cavity, the tightening block abutting against the top bead, and a third spring inside the L-shaped cavity, with both ends of the third spring abutting against the tightening block and the rear stopper respectively. The side wall of the fiber optic ring tooling skeleton has an arc-shaped groove, and the top bead is inserted into the arc-shaped groove.

[0013] In a preferred embodiment, the rear stopper is provided with a connecting nozzle that communicates with the L-shaped cavity, and the connecting nozzle is provided with a connecting tube for the passage of liquid.

[0014] The beneficial effects of this invention are as follows: the axes of the three concentric inner shaft, the active shaft, and the concentric outer shaft are completely coincident, arranged from the inside out in space, and the shafts are connected by bearings, allowing them to rotate without interfering with each other; the locking mechanism can realize the connection state between the active shaft and the concentric inner shaft, and between the active shaft and the concentric outer shaft, to achieve coaxial rotation or independent rotation of the active shaft, and to achieve different working states of the two fiber distribution discs; the fiber optic ring frame adopts a snap-fit ​​connector, which can realize quick locking and unlocking, and facilitates the position transfer of the fiber optic ring frame by manual or automatic mechanisms. Attached Figure Description

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

[0016] Figure 1 This is a schematic diagram of the present invention.

[0017] Figure 2 This is an external schematic diagram of the triple axis structure of the present invention.

[0018] Figure 3 This is a diagram of the internal structure of the triple axis structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the follow-up unlocking mechanism of the present invention.

[0020] Figure 5 This is a cross-sectional view of the locking mechanism of the present invention.

[0021] Figure 6 This is a cross-sectional view of the snap-fit ​​sleeve of the present invention.

[0022] Figure 7 This is a schematic diagram of the internal structure of the end sleeve of the present invention.

[0023] Figure 8 This is an application embodiment diagram of the present invention.

[0024] In the diagram: Triple shaft structure 1; Triple shaft rotating base 101; Drive shaft 102; Follower concentric outer shaft 103; Follower concentric inner shaft 104; First mounting part 105; Second mounting part 106; Third mounting part 107; Connecting block 108; Connecting sleeve 109; Semi-arc sleeve 110; First synchronous pulley 111; Motor drive assembly 2; Second synchronous pulley 201; Follower unlocking mechanism 3; Linear drive module 301; Moving table 302; Pulling frame 303; Hook-shaped structure 304; Wedge-shaped abutment surface 305; Pulled part 306; Guide rod 307; Gear seat 308; First spring 309; Gear ring 310; Movable block 311; Cylindrical head 312; Snap-fit ​​sleeve 4; Receiving sleeve 401; Top block 402; Adjusting cylinder 403; Telescopic top head 404; Second spring 405; Wedge block 406; Connecting rod 407; Guide surface 408; Countersunk groove 409; Stop shoulder 410; End sleeve 411; Adjusting ring 412; L-shaped cavity 413; Tightening block 414; Third spring 415; Rear stop plug 416; Top bead 417; Arc groove 418; Stop ring 419; Connecting nozzle 420; Connecting tube 421; Inner shaft locking mechanism 5; Outer shaft locking mechanism 6; Fiber distribution disc 7; Fiber optic ring tooling frame 8; Fiber optic guide assembly 9; Base frame 10. Detailed Implementation

[0025] Example 1:

[0026] like Figure 1-8 In this invention, a multi-stage coaxial mechanism for optical fiber winding is disclosed. A base 10 is provided on the base 10, and a triple-axis structure 1 is provided on the base 10. The triple-axis structure 1 includes a triple-axis rotating base 101 connected to the base 10. Inside the triple-axis rotating base 101, a follower concentric outer shaft 103, a drive shaft 102, and a follower concentric inner shaft 104 are sequentially fitted, each capable of independent rotation. The follower concentric outer shaft 103, drive shaft 102, and follower concentric inner shaft 104 can rotate synchronously. A follower unlocking mechanism 3 is provided on one side of the triple-axis structure 1, which is used to switch between synchronous and independent rotation states of the follower concentric outer shaft 103, drive shaft 102, and follower concentric inner shaft 104.

[0027] Bearing devices are fitted between the triple-axis rotating base 101, the follower concentric outer shaft 103, the driving shaft 102, and the follower concentric inner shaft 104 to ensure smooth rotation.

[0028] One end of the drive shaft 102 is provided with a second mounting part 106, which is used to install the fiber distribution disc 7. One end of the follower concentric inner shaft 104 is provided with a first mounting part 105, which is used to install the fiber optic ring tooling frame 8. One end of the follower concentric outer shaft 103 is provided with a third mounting part 107, which is used to install the fiber optic guide assembly 9.

[0029] In a preferred embodiment, the follow-up unlocking mechanism 3 includes a linear drive module 301, a movable moving platform 302 on the linear drive module 301, a pulling frame 303 on the moving platform 302, an inner shaft locking mechanism 5 at one end of the follow-up concentric inner shaft 104, and an outer shaft locking mechanism 6 at one end of the follow-up concentric outer shaft 103. The pulling frame 303 is used to pull the inner shaft locking mechanism 5 and the outer shaft locking mechanism 6.

[0030] The linear drive module 301 mainly consists of a lead screw, a slide rail, and a servo motor.

[0031] In a preferred embodiment, the locking mechanism includes a movable gear seat 308, a gear ring 310 is sleeved on the outside of the drive shaft 102, the gear seat 308 abuts against the gear ring 310, and the locking mechanism is provided with a pulled part 306. The pulling frame 303 pulls the pulled part 306 to disengage the gear seat 308 from the gear ring 310.

[0032] In the preferred embodiment, a connecting sleeve 109 is fitted at one end of the follower concentric outer shaft 103, and a connecting block 108 is provided at one end of the follower concentric inner shaft 104. A semi-circular sleeve 110 is provided on one side of the connecting block 108 and the connecting sleeve 109. A telescopic guide rod 307 is provided inside the semi-circular sleeve 110. A gear seat 308 is provided at one end of the guide rod 307, and a movable block 311 is provided at the other end of the guide rod 307. The pulling frame 303 pulls the movable block 311.

[0033] Each locking mechanism has at least two guide rods 307, and the semi-circular sleeve 110 is equipped with a copper bushing or linear bearing to ensure the smoothness and stability of the movement of the movable block 311.

[0034] In the preferred embodiment, the pull frame 303 is provided with two hook-shaped structures 304, each hook-shaped structure 304 is provided with a wedge-shaped abutment surface 305, one end of the movable block 311 is provided with a cylindrical head 312, the wedge-shaped abutment surface 305 abuts against the cylindrical head 312, and a first spring 309 is sleeved on the outside of the guide rod 307, with the two ends of the first spring 309 abutting against the tooth seat 308 and the semi-circular sleeve 110 respectively.

[0035] One end of the cylindrical head 312 is threadedly connected to the movable block 311.

[0036] When the pulling frame 303 disengages from the cylindrical head 312, the gear seat 308, under the action of the first spring 309, presses against the gear ring 310, locking the drive shaft 102. At this time, the drive shaft 102, the follower concentric outer shaft 103, and the follower concentric inner shaft 104 rotate synchronously. Since the hook-shaped structure 304 is deep, it will not interfere with the rotating components. When rotation stops, the cylindrical head 312 returns to the hook-shaped structure 304. When the pulling frame 303 moves, the wedge-shaped abutment surface 305 presses against the cylindrical head 312, and the movable block 311 is pulled up, causing the gear seat 308 to disengage from the surface of the gear ring 310. The drive shaft 102, the follower concentric outer shaft 103, and the follower concentric inner shaft 104 are then unlocked, and each shaft can rotate independently.

[0037] For fully automated fiber winding equipment, there are generally two fiber control modules, denoted as Fiber Control Module A and Fiber Control Module B. Fiber Control Module A has a first fiber distribution tray installed, and Fiber Control Module B has a second fiber distribution tray installed. Fiber Control Modules A and B can be arranged at a 90-degree angle depending on the winding method. This mechanism is installed on the fiber control module. The fiber optic ring fixture 8 can be temporarily fitted onto either Fiber Control Module A or Fiber Control Module B. For example, on Fiber Control Module A, during fiber winding, the fiber distribution tray 7, fiber optic ring fixture 8, and fiber guide assembly 9 on Fiber Control Module A rotate synchronously, while only the fiber distribution tray 7 on Fiber Control Module B rotates to release the fiber, thus achieving fiber winding and splicing.

[0038] In a preferred embodiment, a motor drive assembly 2 is provided on the base frame 10, a second synchronous pulley 201 is provided at the shaft end of the motor drive assembly 2, a first synchronous pulley 111 is provided at the shaft end of the drive shaft 102, and the first synchronous pulley 111 and the second synchronous pulley 201 are driven by a synchronous belt.

[0039] In a preferred embodiment, one end of the follower concentric inner shaft 104 is provided with a snap-fit ​​sleeve 4. The snap-fit ​​sleeve 4 is provided with a plurality of top blocks 402 that can be radially extended and retracted along the snap-fit ​​sleeve 4. The top blocks 402 are used to abut against the inner wall of the fiber optic ring tooling frame 8. The snap-fit ​​sleeve 4 is also provided with an end stop 411, which is used to stop the side wall of the fiber optic ring tooling frame 8.

[0040] In a preferred embodiment, the snap-fit ​​sleeve 4 includes a receiving sleeve 401. One end of the receiving sleeve 401 is provided with a stop shoulder 410. The side wall of the receiving sleeve 401 is provided with a plurality of recesses 409 along the circumferential direction. Each top block 402 is provided in the recesses 409. One end of the top block 402 near the inside of the receiving sleeve 401 is provided with a connecting rod 407. The end of the connecting rod 407 is provided with a wedge block 406. The receiving sleeve 401 is provided with an adjusting cylinder 403. The adjusting cylinder 403 is provided with a second spring 405. The adjusting cylinder 403 is also provided with a telescopic top 404 that can slide along the axis of the receiving sleeve 401. The two ends of the second spring 405 abut against the telescopic top 404 and the adjusting cylinder 403 respectively. The telescopic top 404 abuts against each wedge block 406.

[0041] The snap-fit ​​head 4 is connected to the first mounting part 105. One end of the top block 402 is provided with a guide surface 408. When the fiber optic ring tooling frame 8 is inserted, the guide surface 408 is first squeezed to make the top block 402 retract into the groove 409.

[0042] The snap-fit ​​sleeve 4 has a guide end cap at one end, which abuts against the side of the wedge block 406 to prevent the wedge block 406 from rotating.

[0043] A rubber layer is attached to the outer surface of the top block 402 to increase friction and provide a certain degree of deformability, ensuring the consistency of the pressing state of each top block 402 when the telescopic top head 404 drives the top block 402 in a unified manner.

[0044] The adjusting cylinder 403 is threadedly connected to the inner wall of the hollow structure of the receiving sleeve 401, allowing adjustment of the initial force of the second spring 405. The holding force of the second spring 405 causes the telescopic top head 404 to continuously press against each wedge block 406, maintaining the contact pressure of the top block 402 on the inside of the fiber optic ring tooling frame 8, thus preventing the fiber optic ring tooling frame 8 from shifting and from freely rotating relative to the snap-fit ​​sleeve 4.

[0045] In the preferred embodiment, the receiving sleeve 401 has a narrow diameter section at its front end, and the end sleeve 411 is threadedly connected to the outer wall of the narrow diameter section. The end sleeve 411 includes an adjusting ring 412, an L-shaped cavity 413 inside the adjusting ring 412, a top bead 417 inside the L-shaped cavity 413 near the outer wall of the adjusting ring 412, a tightening block 414 and a rear stopper 416 inside the L-shaped cavity 413, the tightening block 414 abutting against the top bead 417, and a third spring 415 inside the L-shaped cavity 413, with both ends of the third spring 415 abutting against the tightening block 414 and the rear stopper 416 respectively. The side wall of the fiber optic ring tooling skeleton 8 has an arc-shaped groove 418, and the top bead 417 is inserted into the arc-shaped groove 418.

[0046] The outer wall of the adjusting ring 412 is fitted with a stop ring 419. The stop ring 419 has a through hole located at the outlet of the L-shaped cavity 413. The diameter of the through hole is slightly smaller than that of the top bead 417, and it is used to limit the top bead 417.

[0047] The adjustment ring 412 can be adjusted as a whole to adapt to fiber optic ring tooling skeleton 8 of different widths.

[0048] There are multiple arc-shaped grooves 418, which can be arranged around the circumference of the fiber optic ring fixture skeleton 8. When the fiber optic ring fixture skeleton 8 is fitted onto the snap-fit ​​head 4, there will always be an arc-shaped groove 418 that matches the top bead 417 perfectly.

[0049] In a preferred embodiment, the rear stop 416 is provided with a connecting nozzle 420 that communicates with the L-shaped cavity 413, and the connecting nozzle 420 is provided with a connecting pipe 421 for passing liquid.

[0050] The receiving sleeve 401, adjusting cylinder 403, and follower concentric inner shaft 104 are all provided with through holes in the center and on the side wall of the receiving sleeve 401. One end of the connecting pipe 421 passes through the side wall of the receiving sleeve 401 and is led out from the central through hole for communication with the hydraulic system. Liquid is filled into the space between the clamping block 414 and the rear stop 416 in the L-shaped cavity 413. When the valve of the connecting pipe 421 and the hydraulic system is opened, the clamping block 414 is squeezed, and the liquid can return to the oil tank. At this time, the force of the third spring 415 alone forms the resistance force against the arc-shaped groove 418. When the valve is closed, the liquid cannot return, and the clamping block 414 cannot move backward. Therefore, the hydraulic system changes the locking state of the clamping block 414 by switching the connection state of the connecting pipe 421. This valve is located on the side away from the fiber optic ring fixture frame 8, and does not affect the installation and removal of the fiber optic ring fixture frame 8 and the snap-fit ​​sleeve 4. It allows remote control of the locking or unlocking state of the snap-fit ​​sleeve 4 on the fiber optic ring fixture frame 8. In the unlocked state, when the fiber optic ring fixture frame 8 moves laterally under the drive of a manual or other automatic mechanism, and the force exceeds the snap-fit ​​force of the arc-shaped groove 418 on the top bead 417, the top bead 417 can cause the clamping block 414 to retract, and the fiber optic ring fixture frame 8 can be removed from the snap-fit ​​sleeve 4.

[0051] Example 2:

[0052] The motor drive assembly drives the triple shaft mechanism to rotate via synchronous wheel transmission. The follow-up unlocking mechanism is located directly below the triple shaft structure and controls the locking state of the triple shaft through translational motion.

[0053] The follow-up locking assembly has two locations, which lock the follow-up locking outer shaft and the follow-up locking inner shaft to the drive shaft respectively. The follow-up locking assembly uses a compression spring and a linear bearing guide rod assembly to apply a clamping force to the outer gear ring, realizing the meshing of the outer gear ring and the inner gear ring. The inner gear ring is connected to the drive shaft through a flat key to ensure synchronization, thereby achieving the locking function between the shafts.

[0054] The three concentric shafts—the inner follower shaft, the drive shaft, and the outer follower shaft—are connected by bearings and mounted on a triple-shaft rotating base, allowing for independent and free rotation while maintaining a consistent axis of rotation. The synchronous pulley is fixed to the drive shaft to transmit rotational power to the motor drive assembly. The inner follower shaft is locked to the drive shaft via an inner shaft locking mechanism, while the outer follower shaft is locked to the main shaft via an outer shaft locking mechanism.

[0055] The follower unlocking mechanism includes a translation module and a wedge-shaped fixture mounted on it. The wedge-shaped fixture has two sets of wedge-shaped surfaces, each corresponding to one of the two sets of flange bearing followers. When the wedge-shaped fixture moves in translation under the drive of the translation module, the wedge-shaped surfaces contact and press against the cylindrical surfaces of the flange bearing followers, applying a force perpendicular to the axis of the drive shaft outward to the flange bearing followers. This causes the outer gear ring to disengage from the inner gear ring, thus releasing the follower concentric inner shaft and follower concentric outer shaft from the drive shaft.

[0056] The three concentric shafts—the inner, driving, and outer—are perfectly aligned, arranged from the inside out. Connected by bearings, they rotate independently without interference. Once locked by a locking mechanism, the three shafts rotate synchronously. After unlocking by a locking mechanism, the driving shaft rotates under the synchronous belt drive of the motor, while the inner and outer concentric shafts remain stationary. The locking mechanism uses a spring to press the outer gear ring into engagement with the inner gear ring, thus locking the shafts. The unlocking mechanism uses the translational movement of a wedge-shaped workpiece to pull the outer gear ring outwards, disengaging it from the inner gear ring and unlocking the shafts.

[0057] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A multi-stage coaxial mechanism for optical fiber winding, characterized in that: The base frame (10) is provided with a triple shaft structure (1). The triple shaft structure (1) includes a triple shaft rotating base (101). The triple shaft rotating base (101) is connected to the base frame (10). The triple shaft rotating base (101) is fitted with a follower concentric outer shaft (103), a drive shaft (102) and a follower concentric inner shaft (104) that can rotate independently. The follower concentric outer shaft (103), the drive shaft (102) and the follower concentric inner shaft (104) can rotate synchronously. The triple shaft structure (1) is provided with a follower unlocking mechanism (3) on one side. The follower unlocking mechanism (3) is used to switch the synchronous or independent rotation state of the follower concentric outer shaft (103), the drive shaft (102) and the follower concentric inner shaft (104). The follow-up unlocking mechanism (3) includes a linear drive module (301), a movable moving platform (302) is provided on the linear drive module (301), a pulling frame (303) is provided on the moving platform (302), an inner shaft locking mechanism (5) is provided at one end of the follow-up concentric inner shaft (104), an outer shaft locking mechanism (6) is provided at one end of the follow-up concentric outer shaft (103), and the pulling frame (303) is used to pull the inner shaft locking mechanism (5) and the outer shaft locking mechanism (6); The locking mechanism includes a movable gear seat (308), a gear ring (310) is sleeved on the outside of the drive shaft (102), the gear seat (308) abuts against the gear ring (310), the locking mechanism is provided with a pulled part (306), and the pulling frame (303) pulls the pulled part (306) to disengage the gear seat (308) from the gear ring (310); One end of the follower concentric outer shaft (103) is fitted with a connecting sleeve (109), and one end of the follower concentric inner shaft (104) is provided with a connecting block (108). A semi-circular sleeve (110) is provided on one side of the connecting block (108) and the connecting sleeve (109). A telescopic guide rod (307) is provided inside the semi-circular sleeve (110). A gear seat (308) is provided at one end of the guide rod (307), and a movable block (311) is provided at the other end of the guide rod (307). The pulling frame (303) pulls the movable block (311). The pull frame (303) is provided with two hook-shaped structures (304), the hook-shaped structures (304) are provided with wedge-shaped abutment surfaces (305), the movable block (311) is provided with a cylindrical head (312) at one end, the wedge-shaped abutment surface (305) abuts against the cylindrical head (312), and the guide rod (307) is sleeved with a first spring (309) on the outside, the two ends of the first spring (309) abut against the tooth seat (308) and the semi-circular sleeve (110) respectively.

2. The multi-stage coaxial mechanism for fiber winding according to claim 1, characterized in that: The base frame (10) is provided with a motor drive assembly (2), the shaft end of the motor drive assembly (2) is provided with a second synchronous pulley (201), the shaft end of the drive shaft (102) is provided with a first synchronous pulley (111), and the first synchronous pulley (111) and the second synchronous pulley (201) are driven by a synchronous belt.

3. The multi-stage coaxial mechanism for fiber winding according to claim 1, characterized in that: One end of the follower concentric inner shaft (104) is provided with a snap-fit ​​sleeve (4). The snap-fit ​​sleeve (4) is provided with multiple top blocks (402) that can be radially extended and retracted along the snap-fit ​​sleeve (4). The top blocks (402) are used to abut against the inner wall of the fiber optic ring tooling frame (8). The snap-fit ​​sleeve (4) is also provided with an end stop (411). The end stop (411) is used to stop the side wall of the fiber optic ring tooling frame (8).

4. The multi-stage coaxial mechanism for fiber winding according to claim 1, characterized in that: The snap-fit ​​sleeve (4) includes a receiving sleeve (401), one end of which is provided with a stop shoulder (410). The side wall of the receiving sleeve (401) is provided with multiple grooves (409) along the circumferential direction. Each top block (402) is located in the groove (409). The end of the top block (402) near the inside of the receiving sleeve (401) is provided with a connecting rod (407). The end of the connecting rod (407) is provided with a wedge block (406). The receiving sleeve (401) is provided with an adjusting cylinder (403). The adjusting cylinder (403) is provided with a second spring (405). The adjusting cylinder (403) is also provided with a telescopic top head (404) that can slide along the axis of the receiving sleeve (401). The two ends of the second spring (405) abut against the telescopic top head (404) and the adjusting cylinder (403) respectively. The telescopic top head (404) abuts against each wedge block (406).

5. The multi-stage coaxial mechanism for fiber optic winding according to claim 4, characterized in that: The receiving sleeve (401) has a narrow diameter section at the front end. The end sleeve (411) is threadedly connected to the outer wall of the narrow diameter section. The end sleeve (411) includes an adjusting ring (412). The adjusting ring (412) has an L-shaped cavity (413). The L-shaped cavity (413) has a top bead (417) near the outer wall of the adjusting ring (412). The L-shaped cavity (413) has a tightening block (414) and a rear stopper (416). The tightening block (414) abuts against the top bead (417). The L-shaped cavity (413) also has a third spring (415). The two ends of the third spring (415) abut against the tightening block (414) and the rear stopper (416) respectively. The side wall of the fiber optic ring tooling skeleton (8) has an arc-shaped groove (418). The top bead (417) is inserted into the arc-shaped groove (418).

6. The multi-stage coaxial mechanism for fiber optic winding according to claim 5, characterized in that: The rear stopper (416) is provided with a connecting nozzle (420) that communicates with the L-shaped cavity (413). The connecting nozzle (420) is provided with a connecting tube (421) for passing liquid.

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