Optical fiber preform rotation driving device

Abstract

The utility model provides an optical fiber preform rotation driving device which comprises a chuck device and an electric spindle, a connecting piece is arranged between the chuck device and the electric spindle, a connecting shaft is arranged at one end of the connecting piece, the chuck device clamps one end of the connecting shaft, the other end of the connecting shaft is used for being connected with the electric spindle, and a rod locking clamp is arranged at the end of a driving shaft of the electric spindle. The rod locking clamp comprises a basic clamping head, the basic clamping head is used for clamping the optical fiber preform, and the problem that a traditional optical fiber rotation driving device is large in inertia is solved.

Description

Technical Field

[0001] The utility model relates to the field of rotating optical fiber manufacturing, in particular to an optical fiber preform rod rotating driving device. Background Art

[0002] Rotated optical fiber or rotated optical fiber includes circular polarization-maintaining optical fiber, 1 / 4 glass, rotated 3C optical fiber and rotated multi-core optical fiber. Among them, circular polarization-maintaining optical fiber and 1 / 4 glass are mainly used in all-fiber current transformers. This type of optical fiber is obtained by rotating the high-birefringence linear polarization-maintaining optical fiber to obtain circular polarization-maintaining optical fiber. The crosstalk is less affected by temperature and is suitable for sensitive loops in all-fiber current; rotated 3C optical fiber and rotated multi-core optical fiber are mainly used in high-power lasers and distributed sensing. This type of optical fiber is mainly drawn by rotating the optical fiber preform rod during the drawing process. The existing rod making process is to add a rotating chuck to the sample feeding mechanism of the drawing tower and assemble the preform rod on the chuck. Since the device is a fixed device, it is heavy and cannot be replaced. There are limitations in the preparation of various special optical fibers. In addition, due to its heavy weight, the device rotates as a whole during the rotation process, and the rotation inertia is large, which is not easy to accurately control. Long-term use may cause the guide rail to deform. Utility Model Content

[0003] The utility model provides an optical fiber preform rod rotation driving device, which solves the problem of large inertia of the traditional optical fiber rotation driving device.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a rotation drive device for an optical fiber preform rod, including a chuck device and an electric spindle, a connecting piece is provided between the chuck device and the electric spindle, a connecting shaft is provided at one end of the connecting piece, the chuck device clamps one end of the connecting shaft, and the other end of the connecting shaft is used to connect to the electric spindle, a locking rod clamp is provided at the end of the driving shaft of the electric spindle, the locking rod clamp includes a basic clamping head, and the basic clamping head is used to clamp the optical fiber preform rod.

[0005] In the preferred embodiment, a chuck mounting tapered hole is provided at the end of the driving shaft of the electric spindle, a hollow basic chuck is provided in the chuck mounting tapered hole, a plurality of grooves are provided on the side wall of the basic chuck along the circumferential direction, the basic chuck is provided with a rear conical surface that fits with the chuck mounting tapered hole, the basic chuck is also provided with a front conical surface, and a first locking nut with a threaded connection is sleeved on the end of the driving shaft of the electric spindle, a conical surface supporting portion is provided in the first locking nut, and the conical surface supporting portion rests against the front conical surface.

[0006] In a preferred solution, a first spacer sleeve with a reducible diameter is provided in the basic chuck.

[0007] In the preferred embodiment, a hollow grafting chuck is also provided, a grafting shaft is provided at one end of the grafting chuck, the grafting shaft is sleeved with the basic chuck, the grafting chuck is provided with an outer conical surface, the second locking chuck is threadedly connected to the outer side of the first locking chuck, the second locking chuck is provided with an inner conical surface, the inner conical surface is against the outer conical surface, and the side wall of the grafting chuck is provided with multiple grooves along the circumferential direction.

[0008] In a preferred solution, a second spacer sleeve with a reducible diameter is provided in the grafting chuck.

[0009] In a preferred solution, the spacer sleeve comprises a first half sleeve and a second half sleeve, and an avoidance notch is provided between the first half sleeve and the second half sleeve.

[0010] In a preferred solution, the connecting member includes a connecting plate, a flange structure is provided at one end of the connecting shaft, the flange structure of the connecting shaft is connected to the connecting plate, and the connecting plate is connected to the end of the electric spindle.

[0011] The beneficial effects of the utility model are as follows: the device can be quickly disassembled and can be installed and used on any traditional drawing tower without affecting the development of other products; since only the main shaft part of the device rotates and the rotational momentum is small, a smaller motor can be used, thereby reducing the overall structural weight; the device directly rotates by clamping the preform rod by the motor main shaft, with better concentricity, and is more suitable for high-speed rotation and accurate control during the drawing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the utility model.

[0014] Figure 2 It is a structural diagram of the utility model.

[0015] Figure 3 It is an exploded view of the utility model.

[0016] Figure 4 It is a cross-sectional view of the utility model.

[0017] Figure 5 It is a schematic diagram of the diameter expansion connection scheme of the utility model.

[0018] Figure 6 It is a schematic diagram of a spacer sleeve of the utility model.

[0019] Figure 7 It is a basic clamping head structure diagram of the utility model.

[0020] Figure 8 It is a structural diagram of the grafting clamp of the utility model.

[0021] In the figure: a chuck device 1; a connecting piece 2; a connecting shaft 201; a connecting plate 202; an electric spindle 3; a chuck mounting taper hole 301; a locking rod fixture 4; a basic chuck 401; a first locking cap 402; a first spacer 403; a first half sleeve 404; a second half sleeve 405; an avoidance notch 406; a rear conical surface 407; a front conical surface 408; a conical surface support portion 409; a second spacer 410; a grafting chuck 411; a grafting shaft 412; an outer conical surface 413; a second locking cap 414; an inner conical surface 415; an optical fiber preform 5; and a base frame 6. DETAILED DESCRIPTION

[0022] like Figure 1-8 In the invention, a rotation drive device for an optical fiber preform is provided, comprising a chuck device 1 and an electric spindle 3, a connecting member 2 is provided between the chuck device 1 and the electric spindle 3, a connecting shaft 201 is provided at one end of the connecting member 2, the chuck device 1 clamps one end of the connecting shaft 201, and the other end of the connecting shaft 201 is used to connect to the electric spindle 3, a locking rod clamp 4 is provided at the end of the driving shaft of the electric spindle 3, the locking rod clamp 4 comprises a basic clamping head 401, and the basic clamping head 401 is used to clamp the optical fiber preform 5.

[0023] The upper end of the chuck device 1 is connected to the base frame 6. The chuck device 1 is an electric or hydraulic three-jaw chuck. The connector 2 and the electric spindle 3 can be replaced according to the diameter specification of the optical fiber preform rod 5. The electrical interface of the electric spindle 3 adopts a quick-plug structure.

[0024] In the preferred embodiment, a chuck mounting tapered hole 301 is provided at the end of the driving shaft of the electric spindle 3, a hollow basic chuck 401 is provided in the chuck mounting tapered hole 301, a plurality of grooves are provided on the side wall of the basic chuck 401 along the circumferential direction, the basic chuck 401 is provided with a rear conical surface 407 which fits the chuck mounting tapered hole 301, the basic chuck 401 is also provided with a front conical surface 408, and a first locking cap 402 with a threaded connection is sleeved on the end of the driving shaft of the electric spindle 3, a conical surface supporting portion 409 is provided in the first locking cap 402, and the conical surface supporting portion 409 abuts against the front conical surface 408.

[0025] The side wall of the basic chuck 401 is circumferentially grooved to form a plurality of clamping petals. The first locking cap 402 is rotated so that the front conical surface 408 squeezes the conical surface top support portion 409, and the basic chuck 401 moves toward the bottom end of the chuck mounting conical hole 301. The inner wall of the chuck mounting conical hole 301 squeezes the rear conical surface 407, and the clamping petals of the basic chuck 401 shrink inward to clamp the side wall of the optical fiber preform 5.

[0026] In a preferred solution, a first spacer 403 with a reducible diameter is provided in the basic chuck 401 .

[0027] In the preferred embodiment, a hollow grafting chuck 411 is also provided, a grafting shaft 412 is provided at one end of the grafting chuck 411, the grafting shaft 412 is sleeved with the basic chuck 401, the grafting chuck 411 is provided with an outer conical surface 413, a second locking chuck 414 is threadedly connected to the outer side of the first locking chuck 402, an inner conical surface 415 is provided inside the second locking chuck 414, the inner conical surface 415 abuts against the outer conical surface 413, and a plurality of grooves are provided on the side wall of the grafting chuck 411 along the circumferential direction.

[0028] For preform rods with small diameters, they can be directly inserted into the basic chuck 401 for installation. For preform rods with an inner diameter larger than the inner diameter of the basic chuck 401, a grafting chuck 411 with a larger external diameter is required. The second locking cap 414 rotates and squeezes the outer conical surface 413 so that the clamping flaps of the grafting chuck 411 shrink inward and hold the outer wall of the optical fiber preform 5 tightly.

[0029] In a preferred solution, a second spacer 410 with a reducible diameter is provided inside the grafting clamp 411 .

[0030] In a preferred solution, the spacer sleeve includes a first half sleeve 404 and a second half sleeve 405 , and an avoidance notch 406 is provided between the first half sleeve 404 and the second half sleeve 405 .

[0031] The basic clamp 401 is made of steel, and the spacer is made of softer materials such as copper or aluminum to prevent the basic clamp 401 from directly contacting the surface of the preform rod and causing grinding or cracks.

[0032] The avoidance notch 406 is a broken line structure so that a staggered insertion groove and a protrusion are formed at the junction of the first half sleeve 404 and the second half sleeve 405, thereby ensuring the closing margin of the first half sleeve 404 and the second half sleeve 405.

[0033] In a preferred solution, the connecting member 2 includes a connecting plate 202 , a flange structure is provided at one end of the connecting shaft 201 , the flange structure of the connecting shaft 201 is connected to the connecting plate 202 , and the connecting plate 202 is connected to the end of the electric spindle 3 .

[0034] The connection plate 202 can be selected with specific specifications according to the housing connection position and method of the electric spindle 3. A positioning groove is provided on the connection plate 202, and a positioning boss is provided on the flange structure of the connecting shaft 201, which is inserted into the groove.

[0035] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An optical fiber preform rotation drive device, characterized in that: The invention comprises a chuck device (1) and an electric spindle (3), wherein a connecting piece (2) is provided between the chuck device (1) and the electric spindle (3), wherein one end of the connecting piece (2) is provided with a connecting shaft (201), the chuck device (1) clamps one end of the connecting shaft (201), and the other end of the connecting shaft (201) is used to connect to the electric spindle (3), and a locking rod clamp (4) is provided at the end of the driving shaft of the electric spindle (3), wherein the locking rod clamp (4) comprises a basic clamping head (401), and the basic clamping head (401) is used to clamp an optical fiber preform rod (5).

2. The optical fiber preform rotation drive device according to claim 1, characterized in that: A chuck mounting conical hole (301) is provided at the end of the driving shaft of the electric spindle (3), a hollow basic chuck (401) is provided in the chuck mounting conical hole (301), a plurality of grooves are provided on the side wall of the basic chuck (401) along the circumferential direction, the basic chuck (401) is provided with a rear conical surface (407) that fits the chuck mounting conical hole (301), the basic chuck (401) is also provided with a front conical surface (408), the driving shaft end of the electric spindle (3) is sleeved with a first locking cap (402) that is threadedly connected, a conical surface abutting portion (409) is provided in the first locking cap (402), and the conical surface abutting portion (409) abuts against the front conical surface (408).

3. The optical fiber preform rotation drive device according to claim 2, characterized in that: A first spacer sleeve (403) with a reducible diameter is arranged inside the basic clamp (401).

4. The optical fiber preform rotation drive device according to claim 2, characterized in that: A hollow grafting chuck (411) is also provided. A grafting shaft (412) is provided at one end of the grafting chuck (411). The grafting shaft (412) is sleeved with the base chuck (401). The grafting chuck (411) is provided with an outer conical surface (413). A second locking chuck (414) is threadedly connected to the outer side of the first locking chuck (402). An inner conical surface (415) is provided inside the second locking chuck (414). The inner conical surface (415) abuts against the outer conical surface (413). A plurality of grooves are provided on the side wall of the grafting chuck (411) along the circumferential direction.

5. The optical fiber preform rotation drive device according to claim 4, characterized in that: A second spacer (410) with a reducible diameter is arranged inside the grafting clamp (411).

6. The optical fiber preform rotation drive device according to claim 3 or 5, characterized in that: The spacer sleeve comprises a first half sleeve (404) and a second half sleeve (405), and an avoidance notch (406) is provided between the first half sleeve (404) and the second half sleeve (405).

7. The optical fiber preform rotation drive device according to claim 1, characterized in that: The connecting member (2) comprises a connecting plate (202), one end of the connecting shaft (201) is provided with a flange structure, the flange structure of the connecting shaft (201) is connected to the connecting plate (202), and the connecting plate (202) is connected to the end of the electric spindle (3).

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