Clamping device for optical fiber preform

Abstract

The utility model relates to the technical field of optical fiber preform processing, and provides an optical fiber preform clamping device which comprises a mounting seat, a base, an adjusting assembly and a plurality of clamping arms, the base is rotatably arranged on the mounting seat, and the adjusting assembly is arranged on the base and connected with the clamping arms; the plurality of clamping arms are arranged around the base, the end parts of the plurality of clamping arms form a clamping opening for clamping an optical fiber preform, and the caliber of the clamping opening is gradually changed; the adjusting assembly is used for controlling the multiple clamping arms to be close to or away from the center of the base synchronously, so that the caliber of the clamping opening is adjusted. The clamping device for the optical fiber preform provided by the utility model can stably clamp optical fiber preforms with different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber preform processing, in particular to a clamping device for an optical fiber preform. Background Art

[0002] Optical fiber is drawn from optical fiber preform rods. Therefore, the geometric dimensions of the optical fiber preform rods directly affect the quality of the optical fiber. Therefore, it is necessary to measure the geometric dimensions of the optical fiber preform rods to ensure that the geometric dimensions of the optical fiber can meet the design requirements.

[0003] Currently, during the processing and testing of optical fiber preforms, a three-claw chuck is generally used to fix the two ends of the optical fiber preform. In actual production, the three-claw chuck is only suitable for clamping optical fiber preforms with a circular cross-sectional shape. For optical fiber preforms with planes or edges, such as squares, regular hexagons or regular octagons, at least one of the clamping parts of the clamping claws is an edge. The existing three-claw chuck cannot stably clamp the optical fiber preform, which easily causes the optical fiber preform to deviate. Utility Model Content

[0004] The utility model provides a clamping device for an optical fiber preform rod, which is used to solve the problem in the prior art that a three-claw chuck cannot stably clamp the optical fiber preform rod.

[0005] The utility model provides a clamping device for an optical fiber preform rod, comprising: a mounting seat, a base, an adjustment component and a plurality of clamping arms;

[0006] The base is rotatably arranged on the mounting seat, the adjustment assembly is arranged on the base and connected to the plurality of clamping arms; the plurality of clamping arms are arranged around the base, the ends of the plurality of clamping arms form clamping openings for clamping the optical fiber preform, and the diameter of the clamping openings is gradually changed;

[0007] The adjustment component is used to control the multiple clamping arms to synchronously approach or move away from the center of the base, so as to adjust the diameter of the clamping opening.

[0008] According to the optical fiber preform clamping device provided by the utility model, the clamping arm is linearly movable on the base;

[0009] The clamping arm is arranged in a step shape from the center of the base to the outer side of the base, and the clamping arm is provided with a first step surface and a second step surface in sequence from the inside to the outside.

[0010] According to the optical fiber preform clamping device provided by the utility model, anti-interference inclined surfaces are respectively provided on opposite sides of the inner end of the clamping arm.

[0011] According to the optical fiber preform clamping device provided by the utility model, the base has a sliding groove on one side facing the clamping arm, and the sliding groove is a cross-shaped structure passing through the center of the base;

[0012] One end of the clamping arm facing the base is installed in the sliding groove and can slide along the sliding groove.

[0013] According to the optical fiber preform clamping device provided by the utility model, the groove wall of the sliding groove is provided with a guide bar, and the guide bar is extended along the extension direction of the sliding groove;

[0014] A guide groove is arranged on a side wall of one end of the clamping arm facing the base, and the guide bar is movably arranged in the guide groove.

[0015] According to the optical fiber preform clamping device provided by the utility model, the base is a hollow columnar structure, and the adjustment component includes a gear and a gear plate;

[0016] The gear plate is rotatably mounted at the center of the base, the gear is rotatably mounted on the base and is transmission-connected to a side of the gear plate away from the clamping arm, and the side of the gear plate facing the clamping arm is transmission-connected to the clamping arm.

[0017] According to the optical fiber preform clamping device provided by the utility model, a plurality of gear teeth are provided on a side of the gear plate away from the clamping arm, the plurality of gear teeth are arranged along the circumference of the base, and the gear teeth are meshed with the gear;

[0018] A spirally wound groove is provided on one side of the gear plate facing the clamping arm, and a plurality of protrusions are provided on one end of the clamping arm facing the base. The plurality of protrusions are arranged in sequence and spaced apart along the radial direction of the gear plate, and the plurality of protrusions are movably arranged in the spiral groove.

[0019] According to the optical fiber preform clamping device provided by the utility model, the gear is a bevel gear;

[0020] The center axis of the bevel gear is arranged along the radial direction of the base. An adjustment hole is provided at one end of the bevel gear close to the outer side of the base. A through hole is provided on the side of the base. The adjustment hole is exposed from the through hole to facilitate the use of an adjustment tool to screw the bevel gear.

[0021] According to the optical fiber preform clamping device provided by the utility model, the adjustment assembly further includes: a bearing;

[0022] The bevel gear is fixed to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the base.

[0023] According to the utility model, a clamping device for an optical fiber preform rod also includes a rotating table and a rotating driving member;

[0024] The mounting seat and the base are connected via the rotating table, and the rotating driving member is mounted on the rotating table and is transmission-connected to the slide of the rotating table.

[0025] The optical fiber preform clamping device provided by the utility model can adapt the optical fiber preforms of different sizes by gradually setting the diameter of the clamping opening formed by the clamping arm. The clamping arm is then used in conjunction with an adjustment component to control the synchronous approach and separation actions of multiple clamping arms through the adjustment component, and the diameter of the clamping opening is further adjusted to achieve stable clamping of optical fiber preforms of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the clamping device of the optical fiber preform provided by the utility model;

[0028] Figure 2 It is a schematic diagram of a three-dimensional structure in which a plurality of clamping arms provided by the utility model are installed on a base;

[0029] Figure 3 It is a three-dimensional structural schematic diagram of the clamping arm provided by the utility model;

[0030] Figure 4 It is a left-side structural schematic diagram of the clamping arm provided by the utility model;

[0031] Figure 5 It is a three-dimensional structural schematic diagram of the base provided by the utility model;

[0032] Figure 6 It is a three-dimensional structural schematic diagram of the adjustment component provided by the utility model;

[0033] Figure 7 It is a three-dimensional structural schematic diagram of the gear plate provided by the utility model;

[0034] Figure 8 It is a rear structural schematic diagram of the gear plate provided by the utility model.

[0035] Reference numerals:

[0036] 1. Clamping device;

[0037] 11. mounting base; 12. base; 13. adjustment assembly; 14. clamping arm; 15. rotating table; 16. rotating driving member; 121. sliding groove; 122. guide bar; 123. through hole; 131. gear; 132. gear plate; 133. bearing; 141. first step surface; 142. second step surface; 143. anti-interference inclined surface; 144. guide groove; 145. protrusion; 1311. adjustment hole; 1321. gear tooth; 1322. groove;

[0038] 2. Optical fiber preform. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Combine the following Figures 1 to 8 , the optical fiber preform clamping device provided by the embodiment of the utility model is described in detail through specific embodiments and application scenarios.

[0041] In some embodiments, Figure 1 As shown, this embodiment provides a clamping device 1 for an optical fiber preform, comprising: a mounting seat 11 , a base 12 , an adjustment assembly 13 and a plurality of clamping arms 14 .

[0042] The base 12 is rotatably disposed on the mounting base 11, the adjustment assembly 13 is disposed on the base 12 and connected to a plurality of clamping arms 14; the plurality of clamping arms 14 are disposed around the base 12, the ends of the plurality of clamping arms 14 form clamping openings for clamping the optical fiber preform 2, and the diameter of the clamping openings is gradually set.

[0043] The adjusting assembly 13 is used to control the multiple clamping arms 14 to synchronously approach or move away from the center of the base 12 to adjust the diameter of the clamping opening.

[0044] It is understandable that the mounting seat 11 of this embodiment is an L-shaped plate, the vertical plate of the L-shaped plate is fixed on the base 12, and the horizontal plate of the L-shaped plate is used to fix with the workbench to fix the clamping device 1 at different positions of the workbench. The base 12 provides a mounting support for the adjustment component 13 and the plurality of clamping arms 14, and the clamping port is used to clamp the optical fiber preform 2.

[0045] The base 12 can rotate around the mounting base 11 , thereby driving the multiple clamping arms 14 to rotate, so that the clamped optical fiber preform 2 rotates around the axis, making it easier for operators to observe the geometric dimensions of each side of the optical fiber preform 2 .

[0046] The adjustment assembly 13 can control the synchronous movement of the multiple clamping arms 14, thereby adjusting the diameter of the clamping opening, thereby clamping optical fiber preform rods 2 of different sizes, and at the same time, facilitating the installation and removal of the optical fiber preform rod 2 relative to the clamping opening.

[0047] Specifically, the adjustment component 13 can be two relatively arranged linear drive mechanisms, and the output ends of the linear drive mechanisms are connected to the clamping arms 14. When the output ends of the two linear drive mechanisms move toward or away from each other, they drive multiple clamping arms 14 to move closer or farther away synchronously to achieve the adjustment of the diameter of the clamping mouth; or, the adjustment component 13 can also be a structure of an adjusting nut and multiple traction ropes, one end of the multiple traction ropes is connected to the adjusting nut, and the other end is connected to multiple clamping arms 14 one by one. Through the rotation of the adjusting nut, the traction ropes are driven to pull the multiple clamping arms 14 to achieve the adjustment of the diameter of the clamping mouth.

[0048] Since the sizes of the optical fiber preform 2 are different, especially for the optical fiber preform 2 with a smaller cross-sectional size, the effect of adjusting the diameter of the clamping opening by the adjustment component 13 is not sensitive enough. The size of the clamping surface of the clamping arm 14 of this embodiment gradually increases, so that the diameter of the clamping opening is gradually set. When the optical fiber preform 2 is installed in the clamping device 1, by placing the optical fiber preform 2 in the clamping position that matches the outer diameter of the optical fiber preform 2 in the clamping arm 14, frequent adjustment of the adjustment component 13 can be avoided. In addition, the gradual setting of the diameter of the clamping opening enables the clamping arm 14 to adapt to optical fiber preforms 2 of different sizes. When used in conjunction with the adjustment component 13, the clamping range of the clamping device 1 can be expanded to achieve stable clamping of optical fiber preforms 2 of a larger size range, thereby achieving the effect of adapting to optical fiber preforms 2 of different sizes.

[0049] Optionally, the present embodiment is provided with four clamping arms 14, which are arranged opposite to each other in pairs to form a square clamping opening, which can clamp the optical fiber preform 2 with a circular, quadrilateral, octagonal cross section or the like.

[0050] The optical fiber preform clamping device 1 provided by the utility model can adapt to optical fiber preforms 2 of different sizes by gradually setting the diameter of the clamping opening formed by the clamping arm 14. The clamping arm 14 is then used in conjunction with the adjustment component 13 to control the synchronous approach and separation of multiple clamping arms 14 through the adjustment component 13, and further adjust the diameter of the clamping opening to achieve stable clamping of optical fiber preforms 2 of different sizes.

[0051] In some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the clamping arm 14 of this embodiment is disposed on the base 12 so as to be linearly movable.

[0052] The clamp arm 14 is arranged in a step shape from the center of the base 12 to the outer side of the base 12 , and the clamp arm 14 is provided with a first step surface 141 and a second step surface 142 in sequence from the inside to the outside.

[0053] It can be understood that, from the center of the base 12 to the outer side of the base 12, the clamping arm 14 of the present embodiment is arranged in a stepped shape, and one end of the clamping arm 14 clamping the optical fiber preform 2 has an inner end, a first step surface 141 and a second step surface 142, the inner end is closest to the center of the base 12, the clamping opening formed by the inner ends of the four clamping arms 14 has the smallest diameter, which is convenient for abutting the outer side of the optical fiber preform 2 with a smaller cross-sectional size with the inner end, the second step surface 142 is closest to the outer side of the base 12, the clamping opening formed by the second step surfaces 142 of the four clamping arms 14 has the largest diameter, which is convenient for abutting the outer side of the optical fiber preform 2 with a larger cross-sectional size with the second step surface 142, the first step surface 141 is between the inner end and the second step surface 142, and the clamping opening formed by the first step surfaces 141 of the four clamping arms 14 is located between the inner end and the second step surface 142, which is convenient for placing the optical fiber preform 2 of medium size.

[0054] In this embodiment, the clamping arm 14 is arranged in a step shape, so that the edge formed by the step shape can more easily abut against the outer edge of the optical fiber preform 2, and when the optical fiber preform 2 is clamped in the clamping opening, the adjacent step surfaces can also limit the optical fiber preform 2 to prevent the optical fiber preform 2 from shaking during the rotation process. Different step surfaces form a gradient clamping opening, which is conducive to the clamping of optical fiber preforms 2 of different sizes.

[0055] In some embodiments, Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the two opposite sides of the inner end of the clamping arm 14 are respectively provided with anti-interference inclined surfaces 143.

[0056] It is understandable that when the adjustment component 13 controls multiple clamping arms 14 to synchronously approach the center of the base 12 so that the formed clamping opening is minimized, if the ends of adjacent clamping arms 14 are set in squares, the tips of the squares may interfere with each other, making it impossible for the clamping arms 14 to be adjusted to the correct position of the minimum clamping opening. In this embodiment, anti-interference inclined surfaces 143 are set on the opposite sides of the inner end of the clamping arm 14, so that the ends of the clamping arms 14 form an avoidance space. When the ends of two adjacent clamping arms 14 move to the closest point, there is still a gap between the two ends, ensuring the smoothness and reliability of the movement of the clamping arm 14 to the minimum clamping opening.

[0057] In some embodiments, Figure 1and Figure 5 As shown, the base 12 of this embodiment has a sliding groove 121 on one side facing the clamping arm 14 , and the sliding groove 121 is a cross-shaped structure passing through the center of the base 12 .

[0058] One end of the clamping arm 14 facing the base 12 is installed in the sliding groove 121 and can slide along the sliding groove 121 .

[0059] It can be understood that based on the sliding of the clamping arm 14 along the sliding groove 121, the movement of the clamping arm 14 along the base 12 is realized. The four clamping arms 14 of this embodiment slide along the sliding groove 121 of the cross structure respectively. The sliding groove 121 can be directly set on the base 12 without introducing extra volume, thereby ensuring the compactness of the clamping device 1 and facilitating the stability of the movement of the clamping arm 14 along the base 12.

[0060] In some embodiments, Figure 1 and Figure 5 As shown, the groove wall of the sliding groove 121 of this embodiment is provided with a guide bar 122 , and the guide bar 122 is extended along the extension direction of the sliding groove 121 .

[0061] A guide groove 144 is formed on a side wall of one end of the clamp arm 14 facing the base 12 , and the guide bar 122 is movably disposed in the guide groove 144 .

[0062] It is understandable that the guide bar 122 can limit the end of the clamping arm 14 toward the base 12, ensuring that the clamping arm 14 can move in the extension direction of the guide bar 122, so that when the clamping arm 14 slides in the sliding groove 121, there will be no shaking in the sliding groove 121. Based on the cooperation between the guide bar 122 and the guide groove 144, the stability and reliability of the movement of the clamping arm 14 along the sliding groove 121 are achieved.

[0063] Specifically, in this embodiment, guide strips 122 are provided on two opposite groove walls of the sliding groove 121. When the two sides of the clamping arm 14 slide in the sliding groove 121 toward one end of the base 12, no shaking occurs, thereby ensuring the stable movement of the clamping arm 14 along the sliding groove 121.

[0064] In some embodiments, Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the base 12 of this embodiment is a hollow columnar structure, and the adjustment assembly 13 includes a gear 131 and a gear plate 132 .

[0065] The gear plate 132 is rotatably mounted at the center of the base 12 , the gear 131 is rotatably mounted on the base 12 and is transmission-connected to the side of the gear plate 132 facing away from the clamping arm 14 , and the side of the gear plate 132 facing the clamping arm 14 is transmission-connected to the clamping arm 14 .

[0066] It is understandable that the driving gear 131 rotates, and through the transmission of the gear 131 and the gear plate 132, the gear plate 132 also rotates, thereby driving the clamping arm 14 on the other side of the gear plate 132 to synchronously approach or move away from the center of the base 12 to adjust the diameter of the clamping opening. In this embodiment, different transmission structures are arranged on both sides of the gear plate 132, so that the movement of the clamping arm 14 can be adjusted through the rotation of the gear 131. Since the gear 131 and the gear plate 132 are both arranged in the hollow columnar structure of the base 12, the adjustment assembly 13 is arranged in the base 12, and a compact design of the structure is achieved.

[0067] Specifically, the present embodiment is provided with three gears 131 , and any one of the gears 131 being driven can drive the gear plate 132 to rotate, thereby driving the clamping arm 14 to move.

[0068] In some embodiments, Figure 1 , Figure 7 and Figure 8 As shown, a plurality of gear teeth 1321 are provided on a side of the gear plate 132 of this embodiment away from the clamping arm 14 . The plurality of gear teeth 1321 are arranged along the circumference of the base 12 , and the gear teeth 1321 are meshed with the gear 131 .

[0069] A spirally wound groove 1322 is provided on one side of the gear plate 132 facing the clamping arm 14 , and a plurality of protrusions 145 are provided on one end of the clamping arm 14 facing the base 12 . The plurality of protrusions 145 are arranged in sequence and spaced apart along the radial direction of the gear plate 132 , and the plurality of protrusions 145 are movably disposed in the spiral groove 1322 .

[0070] It is understandable that the multiple gear teeth 1321 on the gear plate 132 of this embodiment are meshed with the gear 131, the gear 131 is driven to rotate, and the meshing of the gear 131 and the gear teeth 1321 drives the gear plate 132 to rotate.

[0071] The multiple spaced-apart protrusions 145 of the clamping arm 14 are embedded in the spiral groove 1322 of the gear plate 132. When the gear plate 132 rotates, the spirally wound groove 1322 also rotates, thereby changing the positions of the multiple protrusions 145 in the groove 1322 on the gear plate 132. As the gear plate 132 rotates in the forward or reverse direction, the clamping arm 14 moves linearly relative to the radial direction of the gear plate 132, thereby realizing the adjustment of the position of the clamping arm 14 relative to the base 12.

[0072] In some embodiments, Figure 6 , Figure 7 and Figure 8 As shown, the gear 131 of this embodiment is a bevel gear.

[0073] The center axis of the bevel gear is arranged along the radial direction of the base 12. An adjustment hole 1311 is provided at one end of the bevel gear close to the outer side of the base 12. A through hole 123 is provided on the side of the base 12. The adjustment hole 1311 is exposed from the through hole 123 to facilitate the use of an adjustment tool to screw the bevel gear.

[0074] It is understandable that the tooth surface of the bevel gear is conical, which can provide a larger transmission ratio and a more flexible transmission direction, and is more conducive to driving the rotation of the gear plate 132 through the rotation of the bevel gear.

[0075] Since the bevel gear is disposed in the base 12, a through hole 123 is disposed on the base 12 to expose the adjustment hole 1311 disposed at the end of the bevel gear, so as to facilitate the use of an adjustment tool to screw the bevel gear, thereby adjusting the diameter of the clamping opening.

[0076] In some embodiments, Figure 6 As shown, the adjustment assembly 13 of this embodiment further includes: a bearing 133 .

[0077] The bevel gear is fixed to the inner ring of the bearing 133 , and the outer ring of the bearing 133 is fixedly connected to the base 12 .

[0078] It is understandable that when the bevel gear rotates, the inner ring of the bearing 133 also rotates accordingly, and the outer ring of the bearing 133 is fixed to the base 12, and the bearing 133 provides a mounting support for the bevel gear.

[0079] In some embodiments, Figure 1 As shown, the clamping device 1 of this embodiment further includes a rotating platform 15 and a rotating driving member 16 .

[0080] The mounting seat 11 and the base 12 are connected via a rotating platform 15 . The rotating driving member 16 is installed on the rotating platform 15 and is transmission-connected to a slide of the rotating platform 15 .

[0081] It can be understood that one side of the rotating table 15 is connected to the mounting base 11, and the other side is connected to the base 12 through the slide. The rotating driving member 16 drives the slide to rotate, thereby driving the base 12 to rotate. The base 12 drives the rotation of multiple clamping arms 14, thereby driving the optical fiber preform 2 to rotate around its axis, so that in the process of clamping the optical fiber preform 2 by the clamping device 1, each surface can be observed through the rotation of the optical fiber preform 2.

[0082] Specifically, the rotary driving member 16 may be a stepping motor.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A clamping device for an optical fiber preform, characterized in that: include: A mount, a base, an adjustment assembly, and a plurality of clamp arms; The base is rotatably mounted on the mounting base, and the adjustment assembly is mounted on the base and connected to the plurality of clamping arms; A plurality of clamping arms are arranged around the base, and ends of the plurality of clamping arms form clamping openings for clamping the optical fiber preform, and the diameter of the clamping openings is gradually changed; The adjustment component is used to control the multiple clamping arms to synchronously approach or move away from the center of the base, so as to adjust the diameter of the clamping opening.

2. The optical fiber preform clamping device according to claim 1, characterized in that: The clamping arm is linearly movable on the base; The clamping arm is arranged in a step shape from the center of the base to the outer side of the base, and the clamping arm is provided with a first step surface and a second step surface in sequence from the inside to the outside.

3. The optical fiber preform clamping device according to claim 2, characterized in that: Anti-interference inclined surfaces are respectively provided on opposite sides of the inner end of the clamping arm.

4. The optical fiber preform clamping device according to claim 2, wherein: The base has a sliding groove on one side facing the clamping arm, and the sliding groove is a cross-shaped structure passing through the center of the base; One end of the clamping arm facing the base is installed in the sliding groove and can slide along the sliding groove.

5. The optical fiber preform clamping device according to claim 4, characterized in that: The groove wall of the sliding groove is provided with a guide bar, and the guide bar is extended along the extension direction of the sliding groove; A guide groove is provided on a side wall of one end of the clamping arm facing the base, and the guide bar is movably arranged in the guide groove.

6. The optical fiber preform clamping device according to any one of claims 1 to 5, characterized in that: The base is a hollow columnar structure, and the adjustment assembly includes a gear and a gear plate; The gear plate is rotatably mounted on the center of the base, the gear is rotatably mounted on the base and is transmission-connected to the side of the gear plate away from the clamping arm, and the side of the gear plate facing the clamping arm is transmission-connected to the clamping arm.

7. The optical fiber preform clamping device according to claim 6, characterized in that: A plurality of gear teeth are provided on a side of the gear plate facing away from the clamping arm, the plurality of gear teeth are arranged along the circumference of the base, and the gear teeth are meshed with the gear; A spirally wound groove is provided on the side of the gear plate facing the clamping arm, and a plurality of protrusions are provided on the end of the clamping arm facing the base. The plurality of protrusions are arranged in sequence and spaced apart along the radial direction of the gear plate, and the plurality of protrusions are movably arranged in the spirally wound groove.

8. The optical fiber preform clamping device according to claim 7, characterized in that: The gear is a bevel gear; The central axis of the bevel gear is arranged along the radial direction of the base. An adjustment hole is provided at one end of the bevel gear close to the outer side of the base. A through hole is provided on the side of the base. The adjustment hole is exposed from the through hole to facilitate the use of an adjustment tool to screw the bevel gear.

9. The optical fiber preform clamping device according to claim 8, characterized in that: The adjustment assembly further includes: a bearing; The bevel gear is fixed to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the base.

10. The optical fiber preform clamping device according to claim 1, wherein: Also included is a rotating table and a rotating drive member; The mounting seat and the base are connected via the rotating platform. The rotating driving member is mounted on the rotating platform and is in transmission connection with the slide of the rotating platform.

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