Fiber preform loading robotic arm

Abstract

The present invention relates to the field of optical fiber preforms, and specifically relates to a mechanical arm for loading optical fiber preforms, which includes a guide rail, a moving slide is arranged on the guide rail, a hoist is arranged on the moving slide, a clamping assembly is arranged below the hoist, the clamping assembly is arranged on a movable disk, and a lifting rope connected to the movable disk is also arranged on the hoist. The invention also includes an auxiliary stabilizing mechanism, which is arranged in a fixed frame. The auxiliary stabilizing mechanism is provided with a clamping assembly and a triggering assembly. When the movable disk is lifted to the position of the fixed frame, the clamping assembly is in a state activated by the triggering assembly. Through the activation of the triggering assembly by the movable disk, the present invention promotes the clamping assembly to clamp the optical fiber preform for the second time. By clamping the optical fiber preform with the clamping assembly and the clamping assembly, the stability of the optical fiber preform is ensured, the phenomenon that the optical fiber preform shakes when it is moved is avoided, while improving the stability, the loading efficiency is also improved, and the loading safety is ensured.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber preforms, and more particularly to a manipulator for loading optical fiber preforms. Background Art

[0002] The replacement of the preform in an optical fiber drawing tower is one of the important links in optical fiber manufacturing. Most of the existing optical fiber preform replacement modes rely on manual labor to vertically lift the preform into the drawing tower with the aid of a lifting tool. With the continuous progress of preform technology, the length and diameter of the preform have been increasing, resulting in an increase in the weight of the preform. The operation difficulty for the staff during replacement is getting greater and greater. Due to the difficulty in controlling the sway of the preform, personal injury or workpiece damage may occur if the operation is not careful. Therefore, the existing optical fiber preform replacement mode has high requirements for the proficiency of the operator, a large labor intensity, potential safety hazards, and low work efficiency, and it is difficult to achieve a safe and efficient replacement process.

[0003] The currently publicly disclosed Chinese patent CN201810298002.1, an automatic optical fiber preform replacement device, includes a moving base installed on a moving cross beam. The moving cross beam is connected to a fixed longitudinal beam through a longitudinal driving mechanism. A vertical frame is connected to the moving base. Upper and lower moving seats are respectively installed on the vertical frame at intervals. Upper and lower manipulators are respectively configured on the upper and lower moving seats. Upper and lower clamping jaws are respectively installed at the front ends of the upper and lower manipulators. The fixed longitudinal beam is composed of two parallel and spaced longitudinal beams. Guide rails are installed on the longitudinal beams. The moving cross beam straddles the guide rails of the longitudinal beams. The longitudinal driving mechanism is a gear-rack driving mechanism. The rack is fixedly connected to the fixed longitudinal beam, and the longitudinal driving mechanism is connected to the moving cross beam. The moving cross beam is a rectangular truss. A transverse guide rail is installed on the moving cross beam and is configured with the moving base. The moving base is connected to a transverse movement driving mechanism. The upper and lower moving seats are connected to a lifting mechanism to drive the upper and lower moving seats to synchronously lift along the vertical frame. The upper manipulator includes a swingable upper rear manipulator and an upper front manipulator installed at the front end of the upper rear manipulator. The lower manipulator includes a swingable lower rear manipulator and a lower front manipulator installed at the front end of the lower rear manipulator. The front end of the upper front manipulator is connected to the upper clamping jaw. The front end of the lower front manipulator is connected to the lower clamping jaw. The upper and lower clamping jaws are pneumatic clamping jaws or electric clamping jaws. Pressure sensors are provided on both the upper and lower clamping jaws. A laser anti-collision device is provided on the vertical frame. A machine vision system is provided on the upper clamping jaw. The lifting mechanism is a lead screw lifting mechanism. The upper and lower clamping jaws are respectively connected to the upper and lower front manipulators through radial buffer devices. Cushion blocks are installed inside the upper and lower clamping jaws. The cushion blocks are made of polytetrafluoroethylene.

[0004] According to the above patent, this patent can complete the processes of automatic material picking, operation, and material discharging, which is convenient to use, accurately docks with the material picking point and the material discharging point, and safely and reliably realizes the automatic material change of the preform, improving work efficiency and reducing potential accident hazards. The laser anti-collision system can set different safety distances and working times in the above stages to avoid misjudgment and affect the normal operation of the system, further improving the reliability of the device operation. However, for the picking of the optical fiber preform, this patent is easily affected by the outside world, resulting in the shaking of the optical fiber preform and the possibility of its dropping, and the picking is unstable. Therefore, at present, a robotic arm that can stably feed the optical fiber preform is needed. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, a robotic arm for feeding the optical fiber preform is provided. In the present invention, the activation of the trigger assembly by the movable disk prompts the clamping assembly to clamp the optical fiber preform for the second time. By clamping the optical fiber preform with the clamping assembly and the clamping assembly, the stability of the optical fiber preform is ensured, the phenomenon of shaking when the optical fiber preform is moved is avoided, the stability is improved, the feeding efficiency is also improved, and the feeding safety is ensured.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a robotic arm for feeding the optical fiber preform, including a guide rail, a movable slide is provided on the guide rail, a hoist is provided on the movable slide, a clamping assembly for clamping the optical fiber preform is provided below the hoist, the clamping assembly is arranged on a movable disk, and a lifting rope connecting the movable disk is also provided on the hoist. An auxiliary stabilizing mechanism for stabilizing the optical fiber preform after clamping is further included. The auxiliary stabilizing mechanism is arranged in a fixed frame, the fixed frame is fixedly connected with the movable slide, the auxiliary stabilizing mechanism is provided with a clamping assembly for clamping the optical fiber preform and a trigger assembly for triggering the clamping assembly by the movement of the movable disk. The clamping assembly is arranged below the clamping assembly, and the trigger assembly is arranged on the fixed frame and close to the hoist. When the movable disk is lifted to the position of the fixed frame, the clamping assembly is in a state of being activated by the trigger assembly.

[0008] Preferably, the clamping assembly is provided with clamping plates, there are four clamping plates, the four clamping plates are evenly distributed around the optical fiber preform, an activity strip plate is arranged on the outer side of each clamping plate, the clamping plate is connected with the corresponding activity strip plate, a first insertion rod extends in the direction corresponding to each activity strip plate on the fixed frame, an activity opening sleeved on the corresponding first insertion rod is opened on each activity strip plate, an anti-detachment plate is arranged at the end of the first insertion rod, and a compression spring sleeved on the first insertion rod is fixedly connected between the anti-detachment plate and the activity strip plate.

[0009] Preferably, the triggering component is provided with a rotating shaft. There are four rotating shafts, and the four rotating shafts are respectively located at the positions of an active strip plate. The fixed frame is provided with a shaft seat for the rotating connection of the rotating shaft. The axis direction of the rotating shaft is perpendicular to the axis direction of the first insertion rod. A dial plate is fixedly arranged on the rotating shaft, and the surface of the dial plate contacts the end of the corresponding active strip plate. On the movable disc and at the position of each dial plate, a top plate is provided. When the movable disc moves to the position of the fixed frame, the top plate is in a state of contacting the dial plate.

[0010] Preferably, a torsion spring is sleeved on the rotating shaft, and the two ends of the torsion spring are respectively fixedly connected with the dial plate and the shaft seat.

[0011] Preferably, second insertion rods extend towards the corresponding active strip plates on the clamping plates. The active strip plates are provided with sleeve openings for the second insertion rods to pass through. A buffer spring sleeved on the second insertion rods is fixedly connected between the active strip plates and the clamping plates.

[0012] Preferably, a soft rubber pad is provided on the inner side surface of the clamping plate.

[0013] Preferably, the clamping component is provided with a fixed ring, and the fixed ring is fixedly connected with the movable disc. Four clamping blocks are evenly arranged along the circumferential direction of the fixed ring inside the fixed ring. A guiding rod extends towards the fixed ring on each clamping block. The fixed ring is provided with a guiding opening for the guiding rod to pass through. Each clamping block can move in the fixed ring, and a synchronous driver for driving the four clamping blocks to move simultaneously is provided on the movable disc.

[0014] Preferably, the synchronous driver is provided with a rotating ring, the rotating ring is coaxial with the fixed ring, a bearing is connected between the rotating ring and the fixed ring. A connecting rod is connected between each clamping block and the rotating ring, and both ends of the connecting rod are respectively rotatably connected between the rotating ring and the corresponding clamping block. When the rotating ring rotates, the four clamping blocks are in a state of relative movement simultaneously.

[0015] Preferably, the synchronous driver is further provided with a gear ring and a gear. The gear ring is fixedly sleeved on the rotating ring, the gear is arranged inside the gear ring, and the gear meshes with the gear ring. A rotating motor for driving the gear to rotate is provided on the movable disc.

[0016] Preferably, a contact post is provided on the movable disc. The contact post is coaxially and fixedly arranged at the center of the movable disc, and the end of the contact post extends downward. When the movable disc moves to the top of the optical fiber preform, the contact post is in a state of contacting the top of the optical fiber preform.

[0017] The beneficial effects of this application compared with the prior art are:

[0018] 1. The present invention starts the trigger assembly through the movable disk, prompting the clamping assembly to clamp the optical fiber preform rod for the second time. The optical fiber preform rod is clamped by the clamping assembly and the clamping assembly, thereby ensuring the stability of the optical fiber preform rod, realizing the smooth loading of the optical fiber preform rod, avoiding the shaking of the optical fiber preform rod when being moved, improving the stability, and also improving the loading efficiency, ensuring the loading safety.

[0019] 2. In the present invention, the four movable strips are driven by the trigger assembly to trigger the movable strips to move on the corresponding first plug rods, so that the optical fiber preform is clamped between the four clamping plates, thereby achieving the positioning of the optical fiber preform, maintaining the stability of the optical fiber preform, avoiding the shaking of the optical fiber preform when being moved, improving the stability, and improving the loading efficiency.

[0020] 3. The present invention promotes the top plate to move the paddle plate by moving the movable plate, so that the paddle plate pushes the movable strip plate, so that the optical fiber preform is clamped between the four clamping plates, thereby achieving the positioning of the optical fiber preform, ensuring the stability of the optical fiber preform when moving, and improving the loading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an optical fiber preform feeding mechanical arm;

[0022] Figure 2 This is the left view of the optical fiber preform loading robot arm;

[0023] Figure 3 It is a partial three-dimensional structural cross-sectional view of the optical fiber preform feeding mechanical arm;

[0024] Figure 4 yes Figure 2 Sectional view at AA;

[0025] Figure 5 yes Figure 2 A three-dimensional structural cross-sectional view at AA;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the clamping assembly and auxiliary stabilizing mechanism of the optical fiber preform feeding mechanical arm;

[0027] Figure 7 It is a left view of the clamping assembly and auxiliary stabilizing mechanism of the optical fiber preform feeding robot arm;

[0028] Figure 8 yes Figure 7 Cross-sectional view at BB;

[0029] Figure 9 yes Figure 7 A three-dimensional structural cross-sectional view at BB;

[0030] Figure 10 is Figure 7 a cross-sectional view taken along the C-C line of

[0031] The reference numerals in the figure are as follows:

[0032] 1 - Guide rail; 2 - Moving slide; 3 - Hoist; 31 - Hoisting rope; 4 - Clamping assembly; 41 - Fixed ring; 42 - Clamping block; 421 - Guide rod; 43 - Synchronous drive; 431 - Rotating ring; 4311 - Bearing; 432 - Connecting rod; 433 - Gear ring; 434 - Gear; 435 - Rotating motor; 5 - Movable plate; 51 - Abutting post; 6 - Auxiliary stabilizing mechanism; 61 - Clamping assembly; 611 - Clamping plate; 6111 - Soft rubber pad; 612 - Movable strip; 613 - First plug rod; 6131 - Anti - detachment plate; 6132 - Compression spring; 614 - Second plug rod; 6141 - Buffer spring; 62 - Trigger assembly; 621 - Rotating shaft; 6211 - Shaft seat; 622 - Pushing plate; 623 - Top plate; 624 - Torsion spring; 7 - Fixed frame; 8 - Optical fiber preform. Embodiment

[0033] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0034] Referring to Figures 1-5 as shown, the optical fiber preform loading manipulator includes a guide rail 1, a moving slide 2 is arranged on the guide rail 1, a hoist 3 is arranged on the moving slide 2, a clamping assembly 4 for clamping the optical fiber preform 8 is arranged below the hoist 3, the clamping assembly 4 is arranged on a movable plate 5, a hoisting rope 31 connecting the hoist 3 and the movable plate 5 is further arranged on the hoist 3, and an auxiliary stabilizing mechanism 6 for stabilizing the optical fiber preform 8 after clamping is further included. The auxiliary stabilizing mechanism 6 is arranged in a fixed frame 7, the fixed frame 7 is fixedly connected with the moving slide 2, the auxiliary stabilizing mechanism 6 is provided with a clamping assembly 61 for clamping the optical fiber preform 8 and a trigger assembly 62 for triggering the clamping assembly 61 through the movement of the movable plate 5. The clamping assembly 61 is arranged below the clamping assembly 4, and the trigger assembly 62 is arranged on the fixed frame 7 and near the hoist 3. When the movable plate 5 is lifted to the position of the fixed frame 7, the clamping assembly 61 is in a state of being activated by the trigger assembly 62.

[0035] When loading the optical fiber preform 8, first, the moving carriage 2 moves on the guide rail 1 until it reaches the position above the optical fiber preform 8. Then, the hoist 3 drives the lifting rope 31 to move the movable plate 5 downward until the clamping assembly 4 on the movable plate 5 reaches the upper end of the optical fiber preform 8. After that, the clamping assembly 4 is activated, and the clamping assembly 4 clamps the upper end of the optical fiber preform 8. After clamping, the hoist 3 is activated again to drive the lifting rope 31 to pull up the movable plate 5, so that the movable plate 5 moves into the fixed frame 7. Until the movable plate 5 contacts the trigger assembly 62, the trigger assembly 62 is activated, and then drives the clamping assembly 61 to clamp the lower half of the optical fiber preform 8 to position the optical fiber preform 8. Since the lifting rope 31 will shake when pulling up the optical fiber preform 8 and driving it to move, the optical fiber preform 8 will shake, which is likely to cause the optical fiber preform 8 to break away from the clamping assembly 4 and fall, thus damaging the optical fiber preform 8 and also likely to cause harm to the personnel below, which is somewhat dangerous. With the positioning of the optical fiber preform 8 by the clamping assembly 61, and the clamping assembly 61 is connected to the fixed frame 7 fixedly connected to the moving carriage 2. Therefore, after the clamping assembly 61 positions the optical fiber preform 8, the optical fiber preform 8 is limited in the clamping assembly 61, so that the lifting rope 31 cannot shake. Thus, while clamping the optical fiber preform 8 for the second time, the stability of the optical fiber preform 8 is also ensured, effectively improving the moving loading of the optical fiber preform 8, improving the loading efficiency, and avoiding accidents. Finally, the optical fiber preform 8 is moved to the designated position by the movement of the moving carriage 2 on the guide rail 1, realizing the loading action of the optical fiber preform 8.

[0036] See Figures 5-10 As shown, the clamping assembly 61 is provided with clamping plates 611. There are four clamping plates 611, and the four clamping plates 611 are evenly distributed around the optical fiber preform 8. An active strip 612 is provided on the outer side of each clamping plate 611. The clamping plate 611 is connected to the corresponding active strip 612. The fixed frame 7 extends a first insertion rod 613 in the direction corresponding to each active strip 612. An active opening sleeved on the corresponding first insertion rod 613 is formed on each active strip 612. An anti - detachment plate 6131 is provided at the end of the first insertion rod 613. A compression spring 6132 sleeved on the first insertion rod 613 is fixedly connected between the anti - detachment plate 6131 and the active strip 612.

[0037] When the clamping assembly 61 clamps the optical fiber preform 8, the four clamping plates 611 move toward the optical fiber preform 8 at the same time, and the four clamping plates 611 move on the corresponding first plug rods 613 through the movable strips 612. After the movable strips 612 are triggered to move by the trigger assembly 62, the movement of the movable strips 612 drives the clamping plates 611 to move, so that the four clamping plates 611 clamp the optical fiber preform 8 therein, and the compression spring 6132 is in a stretched state at this time, and the optical fiber preform 8 is positioned in the four clamping plates 611, ensuring the stability of the optical fiber preform 8. When the positioning of the optical fiber preform 8 is released, the hoisting machine 3 only needs to lower the movable disk 5, thereby causing the optical fiber preform 8 to be lowered, and the movable disk 5 is away from the trigger assembly 62, and the compression spring 6132 gradually returns to a normal state, and the clamping plates 611 also gradually move away from the optical fiber preform 8, releasing the clamping positioning of the optical fiber preform 8, which is convenient for placing the optical fiber preform 8.

[0038] See also Figure 6 and Figure 9 As shown, the trigger assembly 62 is provided with a rotating shaft 621, and the rotating shaft 621 has four. The four rotating shafts 621 are respectively located at the position of a movable strip plate 612. The fixed frame 7 has a shaft seat 6211 for rotationally connecting the rotating shaft 621. The axial direction of the rotating shaft 621 is perpendicular to the axial direction of the first plug rod 613. A dial plate 622 is fixedly provided on the rotating shaft 621. The surface of the dial plate 622 contacts the end of the corresponding movable strip plate 612. A top plate 623 is provided on the movable disk 5 and at the position of each dial plate 622. When the movable disk 5 moves to the position of the fixed frame 7, the top plate 623 is in contact with the dial plate 622.

[0039] When the trigger assembly 62 is triggered by the movable disk 5, the movable disk 5 moves up, and the top plate 623 thereon pushes the dial plate 622, so that the dial plate 622 rotates on the shaft seat 6211 through the rotating shaft 621, and the rotation of the dial plate 622 drives the movable strip plate 612 to move on the first plug rod 613 toward the optical fiber preform 8, until the optical fiber preform 8 is clamped between the four clamping plates 611, the crane 3 stops moving the movable disk 5, and the optical fiber preform 8 is also positioned between the four clamping plates 611 to maintain stability, and when the movable disk 5 moves downward, the top plate 623 moves away from the dial plate 622, releasing the pressure on the movable strip plate 612, thereby loosening the clamping of the optical fiber preform 8.

[0040] See also Figure 9 As shown, a torsion spring 624 is sleeved on the rotating shaft 621 , and two ends of the torsion spring 624 are fixedly connected to the shifting plate 622 and the shaft seat 6211 respectively.

[0041] When the dial plate 622 rotates, the torsion spring 624 is in a twisted state. When the top plate 623 releases the pressing state on the dial plate 622, the torsion spring 624 gradually returns to the normal state, and the dial plate 622 also returns to its original position, causing the clamping plate 611 to move away from the optical fiber preform 8, releasing the locking state of the optical fiber preform 8, so that the optical fiber preform 8 can be placed at the designated position.

[0042] See Figure 9 and Figure 10 As shown, second insertion rods 614 extend in the direction towards the corresponding movable strip 612 on the clamping plate 611. A socket is formed on the movable strip 612 for the second insertion rod 614 to pass through. A buffer spring 6141 sleeved on the second insertion rod 614 is fixedly connected between the movable strip 612 and the clamping plate 611.

[0043] When the clamping plate 611 clamps the optical fiber preform 8, the movable strip 612 pushes the clamping plate 611 to move. After the clamping plate 611 contacts the optical fiber preform 8, it continuously moves the movable strip 612, causing the buffer spring 6141 to be in a compressed state, which not only ensures a firm clamping of the optical fiber preform 8 but also provides a buffering effect on the clamping of the optical fiber preform 8, improving the clamping stability and firmness and avoiding damage to the optical fiber preform 8.

[0044] See Figure 9 As shown, a soft rubber pad 6111 is provided on the inner side of the clamping plate 611.

[0045] When the clamping plate 611 clamps the optical fiber preform 8, the soft rubber pad 6111 on its surface contacts the surface of the optical fiber preform 8, making the clamping of the optical fiber preform 8 more precise and improving the clamping firmness.

[0046] See Figures 8-10 As shown, the clamping assembly 4 is provided with a fixed ring 41. The fixed ring 41 is fixedly connected to the movable disk 5. Four clamping blocks 42 are evenly arranged along the circumferential direction of the fixed ring 41 inside the fixed ring 41. A guide rod 421 extends in the direction towards the fixed ring 41 on each clamping block 42. A guide opening for the guide rod 421 to pass through is formed on the fixed ring 41. Each clamping block 42 can move in the fixed ring 41. A synchronous driver 43 for driving the four clamping blocks 42 to move simultaneously is provided on the movable disk 5.

[0047] When the clamping assembly 4 clamps the end of the optical fiber preform 8, the synchronous driver 43 drives the four clamping blocks 42 to move simultaneously on the fixed ring 41, so that the end of the optical fiber preform 8 is clamped between the four clamping blocks 42, thereby realizing the clamping of the optical fiber preform 8.

[0048] See Figures 8-10As shown, the synchronous drive 43 is provided with a rotating ring 431. The rotating ring 431 is coaxial with the fixed ring 41. A bearing 4311 is connected between the rotating ring 431 and the fixed ring 41. A connecting rod 432 is connected between each clamping block 42 and the rotating ring 431. Both ends of the connecting rod 432 are rotatably connected between the rotating ring 431 and the corresponding clamping block 42. When the rotating ring 431 rotates, the four clamping blocks 42 are in a state of relative movement simultaneously.

[0049] When the synchronous drive 43 is started, it drives the rotating ring 431 to rotate. Since a connecting rod 432 is axially connected between each clamping block 42 and the rotating ring 431, when the rotating ring 431 rotates, the connecting rod 432 makes a pushing action, prompting the clamping block 42 to move. The synchronous and relative movement of the four clamping blocks 42 thus clamps the optical fiber preform 8.

[0050] See Figure 9 As shown, the synchronous drive 43 is also provided with a gear ring 433 and a gear 434. The gear ring 433 is fixedly sleeved on the rotating ring 431. The gear 434 is arranged inside the gear ring 433. The gear 434 meshes with the gear ring 433. A rotating motor 435 for driving the gear 434 to rotate is provided on the movable disk 5.

[0051] When driving the rotating ring 431 to rotate, the rotating motor 435 drives the gear 434 to rotate. Since the gear 434 meshes with the gear ring 433, the gear ring 433 rotates and thus drives the rotating ring 431 to rotate, realizing the movement of the clamping block 42.

[0052] See Figure 8 and Figure 9 As shown, the movable disk 5 is provided with an abutting post 51. The abutting post 51 is coaxially and fixedly arranged at the center of the movable disk 5. The end of the abutting post 51 extends downward. When the movable disk 5 moves to the top of the optical fiber preform 8, the abutting post 51 is in a state of contacting the top of the optical fiber preform 8.

[0053] After the movable disk 5 moves to the top position of the optical fiber preform 8 until the abutting post 51 contacts the top of the optical fiber preform 8, at this time, the clamping assembly 4 starts, so as to be able to clamp the top of the optical fiber preform 8, complete the clamping of the optical fiber preform 8, and move it to the required loading position until it reaches the required loading position.

[0054] In the present invention, by starting the trigger assembly 62 through the movable disk 5, the clamping assembly 61 is prompted to clamp the optical fiber preform 8 for the second time. By clamping the optical fiber preform 8 through the clamping assembly 4 and the clamping assembly 61, the stability of the optical fiber preform 8 is ensured, the phenomenon that the optical fiber preform 8 shakes when it is moved is avoided, while improving the stability, the loading efficiency is also improved, and the loading safety is ensured.

[0055] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. The manipulator for loading the optical fiber preform includes a guide rail (1), a moving slide (2) is provided on the guide rail (1), a hoist (3) is provided on the moving slide (2), and a clamping assembly (4) for clamping the optical fiber preform (8) is provided below the hoist (3). The clamping assembly (4) is arranged on a movable disk (5), and a lifting rope (31) connecting the movable disk (5) is also provided on the hoist (3). It is characterized in that It further includes an auxiliary stabilizing mechanism (6) for stabilizing the optical fiber preform (8) after clamping. The auxiliary stabilizing mechanism (6) is arranged in a fixed frame (7), and the fixed frame (7) is fixedly connected to the moving slide (2). The auxiliary stabilizing mechanism (6) is provided with a clamping assembly (61) for clamping the optical fiber preform (8) and a triggering assembly (62) for triggering the clamping assembly (61) by the movement of the movable disk (5). The clamping assembly (61) is arranged below the clamping assembly (4), and the triggering assembly (62) is arranged on the fixed frame (7) and close to the hoist (3). When the movable disk (5) is lifted to the position of the fixed frame (7), the clamping assembly (61) is in a state of being activated by the triggering assembly (62).

2. The fiber preform loading robotic arm according to claim 1, characterized in that, The clamping assembly (61) is provided with clamping plates (611). There are four clamping plates (611), and the four clamping plates (611) are evenly distributed around the optical fiber preform (8). An active strip (612) is arranged on the outer side of each clamping plate (611). The clamping plate (611) is connected to the corresponding active strip (612). A first insertion rod (613) extends in the direction corresponding to each active strip (612) on the fixed frame (7). An active opening sleeving on the corresponding first insertion rod (613) is formed on each active strip (612). An anti - detachment plate (6131) is arranged at the end of the first insertion rod (613), and a compression spring (6132) sleeving on the first insertion rod (613) is fixedly connected between the anti - detachment plate (6131) and the active strip (612).

3. The optical fiber preform loading robotic arm according to claim 2, wherein, The triggering assembly (62) is provided with rotating shafts (621). There are four rotating shafts (621), and the four rotating shafts (621) are respectively located at the position of an active strip (612). The fixed frame (7) is provided with a shaft seat (6211) for the rotating shaft (621) to be rotatably connected. The axis direction of the rotating shaft (621) is perpendicular to the axis direction of the first insertion rod (613). A dial (622) is fixedly arranged on the rotating shaft (621). The surface of the dial (622) contacts the end of the corresponding active strip (612). A top plate (623) is arranged on the movable disk (5) and at the position of each dial (622). When the movable disk (5) moves to the position of the fixed frame (7), the top plate (623) is in a state of contacting the dial (622).

4. The fiber preform loading robot according to claim 3, characterized in that, A torsion spring (624) is sleeved on the rotating shaft (621), and the two ends of the torsion spring (624) are respectively fixedly connected to the dial (622) and the shaft seat (6211).

5. The optical fiber preform loading robot arm according to claim 2, wherein On the clamping plate (611), second insertion rods (614) extend in the direction towards the corresponding movable strip (612). A socket is formed on the movable strip (612) for the second insertion rods (614) to pass through. A buffer spring (6141) sleeved on the second insertion rods (614) is fixedly connected between the movable strip (612) and the clamping plate (611).

6. The optical fiber preform loading robotic arm according to claim 2, characterized in that, On the clamping plate (611) and on the side facing the inside, a soft rubber pad (6111) is provided.

7. The fiber preform loading robotic arm according to claim 1, characterized in that, The clamping assembly (4) is provided with a fixed ring (41). The fixed ring (41) is fixedly connected to the movable disk (5). Four clamping blocks (42) are evenly arranged inside the fixed ring (41) along the circumferential direction of the fixed ring (41). On each clamping block (42), a guide rod (421) extends in the direction towards the fixed ring (41). A guide opening for the guide rod (421) to pass through is formed on the fixed ring (41). Each clamping block (42) can move in the fixed ring (41). On the movable disk (5), a synchronous driver (43) is provided for driving the four clamping blocks (42) to move simultaneously.

8. The fiber preform loading robotic arm according to claim 7, characterized in that, The synchronous driver (43) is provided with a rotating ring (431). The rotating ring (431) is coaxial with the fixed ring (41). A bearing (4311) is connected between the rotating ring (431) and the fixed ring (41). A connecting rod (432) is connected between each clamping block (42) and the rotating ring (431). The two ends of the connecting rod (432) are respectively rotatably connected between the rotating ring (431) and the corresponding clamping block (42). When the rotating ring (431) rotates, the four clamping blocks (42) are in a state of relative movement simultaneously.

9. The fiber preform loading robot arm according to claim 8, wherein, The synchronous driver (43) is further provided with a gear ring (433) and a gear (434). The gear ring (433) is fixedly sleeved on the rotating ring (431). The gear (434) is arranged inside the gear ring (433). The gear (434) meshes with the gear ring (433). On the movable disk (5), a rotating motor (435) is provided for driving the gear (434) to rotate.

10. The fiber preform loading robot arm according to claim 9, characterized in that, On the movable disk (5), a contact post (51) is provided. The contact post (51) is coaxially and fixedly arranged at the center of the movable disk (5). The end of the contact post (51) extends downward. When the movable disk (5) moves to the top of the optical fiber preform (8), the contact post (51) is in a state of contacting the top of the optical fiber preform (8).

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