Optical fiber assembly precision positioning tool clamp

Abstract

The application discloses a fiber assembly precision positioning tool clamp and belongs to the technical field of wire positioning clamps. The tool clamp comprises a positioning clamp mechanism, the positioning clamp mechanism comprises a workbench arranged on a bottom plate, a driving motor is arranged on one side of the outer wall of the workbench, the output shaft of the driving motor extends to a positive and negative tooth bidirectional lead screw, the outer wall of the positive and negative tooth bidirectional lead screw is spirally connected with first sliding blocks moving in opposite directions at both ends, a fixing seat is arranged on the top of the first sliding blocks, an electrode rod is connected to the top of the fixing seat in a limiting clamping mode, and one end of the electrode rod is electrically connected with a power supply; the outer wall of the first sliding blocks is connected with second sliding blocks at both ends through first swing rods. The tool clamp can solve the technical problem that the existing clamps are generally designed as fixed structures, i.e. only a certain size of optical fiber can be fixed and positioned, and the clamps cannot be used for positioning and clamping optical fibers with different sizes or different core numbers, and the practicability is poor.

Description

Technical Field

[0001] This invention belongs to the field of wire positioning fixture technology, specifically relating to a precision positioning fixture for optical fiber assembly. Background Technology

[0002] Fiber optic assembly is divided into cold splicing rapid assembly and hot fusion assembly. In hot fusion assembly, the cable is first stripped and fixed, the fiber end face is cut flat with a cleaver, and then placed into the V-groove of the fusion splicer to align with the fiber core for discharge fusion splicing. After the fusion is completed, the heat shrink tubing is moved to the fusion splice for heating and protection, and finally the fiber is coiled to fix it to avoid bending and squeezing.

[0003] Fiber optic assembly and positioning fixtures are precision tooling in the optical communication packaging process. Their core functions are to constrain bare fibers, fiber ribbons, fiber arrays, PLC splitter fibers, etc., to achieve high-precision positioning, alignment and coupling, dispensing and curing, grinding and assembly, and to strictly control the axial or radial offset of the fiber to ensure coupling accuracy and reduce insertion loss.

[0004] During fiber optic assembly, positioning fixtures are needed to limit and fix the fiber optics to facilitate subsequent processing. However, existing fixtures are generally designed as fixed structures, meaning they can only limit and fix fibers of a certain size and cannot be used to position and clamp fibers of different sizes or core counts, resulting in poor practicality. During the discharge splicing process using electrode rods, the interval also needs to be adjusted to change the arc coverage and the size of the heated area of ​​the fiber. In addition, if particulate impurities adhere to the surface of the fiber during assembly and are not properly cleaned, it will also affect the quality of subsequent processing. Summary of the Invention

[0005] The purpose of this invention is to provide a precision positioning fixture for optical fiber assembly, which solves the technical problem that existing fixtures are generally designed with a fixed structure, that is, they can only limit and fix optical fibers of a certain size and cannot be used for positioning and clamping optical fibers of different sizes or with different core counts, resulting in poor practicality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A precision positioning fixture for fiber optic assembly, comprising:

[0008] A positioning clamping mechanism includes a worktable placed on a base plate. A drive motor is installed on one side of the outer wall of the worktable. The output shaft of the drive motor extends to a bidirectional lead screw with forward and reverse threads. Both ends of the bidirectional lead screw have a first slider that moves in opposite directions via a helical drive. A fixed seat is installed on the top of the first slider. An electrode rod is connected to the top of the fixed seat by a limiting snap-fit. One end of the electrode rod is electrically connected to a power source.

[0009] Both ends of the outer wall of the first slider are connected to the second slider via the first swing rod, and a clamping seat fixed on the worktable is provided between adjacent second sliders. The clamping seat includes a fixed end, a movable end and a reset elastic element. The fixed end is fixed to the worktable, and the movable end is slidably disposed on the fixed end along the width direction of the clamping seat via the reset elastic element. An arc-shaped limiting groove is opened in the length direction of the top of the clamping seat to support and radially limit the optical fiber. The second slider and the movable end on the clamping seat are connected by a bending rod.

[0010] Furthermore, the output shaft of the drive motor and the bidirectional lead screw with forward and reverse threads are fixedly connected by a coupling. The worktable is provided with a first strip groove extending in the width direction and a second strip groove extending in the length direction. The first slider is slidably disposed in the first strip groove and the second slider is slidably disposed in the second strip groove. The two ends of the first swing rod are rotatably connected to the first slider and the second slider, respectively. A U-shaped frame spanning the clamping seat is provided above the clamping seat, and a first housing is fixedly installed at the bottom of the U-shaped frame.

[0011] Furthermore, the extended end of the top of the bending rod is fixedly connected to a first rack plate extending into the interior of the first housing. The outer wall of the first rack plate is driven by a second rack plate through the meshing of a first rotating tooth. The first rack plate and the second rack plate are arranged perpendicularly. The bottom of the second rack plate penetrates the first housing and extends to the clamping plate. A clamping cavity for accommodating and clamping optical fibers is formed between the clamping plate and the clamping seat.

[0012] Furthermore, the outer edge of the first rotating tooth is provided with a rotating groove that connects to the first housing. The outer wall of the first housing is provided with movable holes for the first rack plate and the second rack plate to pass through and guide their movement direction. The clamping seat and the worktable are connected by locking and fixing with a positioning pin.

[0013] Furthermore, it also includes a pre-treatment cleaning mechanism, which includes a conveyor line placed on a workbench. The conveyor line is installed on a frame and extends along the length of the frame to carry and transport optical fibers. Panels are installed around the top of the frame via brackets. Cylinders are fixedly installed on the panels. The bottom of the piston rod on the cylinder is connected to a cover plate via a lifting rod. A camera adapted to the cover plate is installed at the bottom of the cover plate. The signal output terminal of the camera is connected to a controller, and the controller is connected to a display to output the optical fiber image or processing result captured by the camera to the display.

[0014] Furthermore, both sides of the outer wall of the lifting rod are respectively connected to a first moving rod and a second moving rod via a second swing rod. The bottom of the first moving rod and the second moving rod are respectively movably connected to a pressure roller and a cleaning roller that are in contact with the optical fiber. The outer wall of the cleaning roller is glued and fixed with bristles, and both ends of the pressure roller and the cleaning roller are respectively connected to the side walls of the first moving rod and the second moving rod via movable shafts.

[0015] Furthermore, a third rack plate is installed on one side of the outer wall of the first moving rod away from the lifting rod via a synchronizing rod. One end of the third rack plate meshes with a second rotating tooth on the inner wall of the second housing. The central axis of the second rotating tooth is fixed on a first bevel gear. A second bevel gear meshes with the outer wall of the first bevel gear. One end of the rotating shaft at the center of the second bevel gear is connected to a rotating rod extending to the outside of the second housing. A brush plate that movably abuts against the optical fiber is installed at the bottom of the rotating rod.

[0016] Furthermore, the top of the second housing is fixed to the panel by a mounting rod, and the side wall of the second housing has a shaft hole for the rotating shaft to pass through. One end of each of the second swing rods is rotatably connected to the lifting rod, the other end of one of the second swing rods is rotatably connected to the first moving rod, and the other end of the other second swing rod is rotatably connected to the second moving rod. One end of the first bevel gear is fixed to the side wall of the second housing by a bearing.

[0017] Furthermore, the panel is equipped with a controller, the signal output terminal of the camera is connected to the controller, the controller is connected to the conveyor line, the cylinder and the drive motor respectively, the controller is used to extract the edges of the optical fiber image captured by the camera, obtain the optical fiber centerline, the optical fiber outer diameter and the surface impurity area, generate the target rotation angle of the drive motor according to the optical fiber outer diameter, generate the stop position of the conveyor line according to the optical fiber centerline offset, and control the cylinder to repeatedly descend and clean according to the surface impurity area.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] (1) In this invention, by cooperating with the drive motor, coupling and bidirectional lead screw, the first sliders at both ends of the bidirectional lead screw can be driven to move synchronously in opposite directions along the width of the worktable, thereby driving the two fixed seats and the electrode rods on them to move closer or further away synchronously. This structure can achieve precise adjustment of the electrode rod spacing, so that the positions of the electrode rods and the optical fiber to be assembled are kept in correspondence, which is beneficial to improving the alignment accuracy in the process of optical fiber assembly, splicing or positioning, and reducing manual adjustment errors.

[0020] (2) In this invention, a mechanical linkage structure is formed by the first slider, the first swing rod, the second slider, and the bending rod. When the first slider moves, the first swing rod can drive the second slider to move along the length of the worktable, and then the bending rod can drive the movable end of the clamping seat to move. This allows the position adjustment of the electrode rod to be synchronized with the optical fiber clamping action, and the support area at both ends of the optical fiber to be adaptively adjusted, avoiding optical fiber position deviation caused by step-by-step positioning and clamping operations, and improving the stability of optical fiber clamping and assembly efficiency.

[0021] (3) In this invention, an arc-shaped limiting groove adapted to the optical fiber is provided on the top of the clamping seat, and a U-shaped frame, a first housing, a first rack plate, a first rotating tooth, a second rack plate, and a clamping plate are provided above the clamping seat. When the bending rod moves, it can drive the first rack plate to move, and the horizontal movement is converted into the vertical movement of the second rack plate through the first rotating tooth, thereby driving the clamping plate to press the optical fiber downward. This structure can not only reliably limit the optical fiber in the vertical direction, but also cooperate with the arc-shaped limiting groove to position and support the optical fiber, reducing the possibility of the optical fiber being skewed, shifted, or subjected to uneven force during the clamping process.

[0022] (4) In this invention, a pre-treatment cleaning mechanism is provided. The optical fiber is carried and transported by a conveyor line. The lifting rod and cover plate are moved up and down by a cylinder, and the surface and position of the optical fiber are observed by a camera. At the same time, when the lifting rod descends, the first moving rod and the second moving rod can be driven by the second swing rod to make the pressure roller press the optical fiber, and the cleaning roller and brush bristles roll to clean the surface of the optical fiber. The first moving rod can drive the brush plate to swing and clean by a synchronous rod, the third rack plate, the second rotating tooth, the first bevel gear, the second bevel gear and the rotating rod. Thus, the optical fiber can be flattened, cleaned and inspected before entering the positioning and clamping process, reducing the impact of dust, lint and other impurities on the subsequent assembly accuracy and finished product quality.

[0023] (5) In this invention, compared with the scheme of separately setting an electrode adjustment mechanism, a lateral clamping mechanism and an upper clamping mechanism, the present invention installs the electrode rod on the first slider driven by the bidirectional screw with positive and negative teeth, and converts the lateral displacement of the first slider into the extension displacement of the movable end of the clamping seat through the first swing rod, the second slider and the bending rod, and at the same time converts the horizontal displacement of the bending rod into the downward pressure displacement of the clamping plate through the first rack plate, the first rotating tooth and the second rack plate. Thus, the change of electrode rod spacing, the change of optical fiber lateral support range and the upper clamping force are completed within the same driving stroke, so that the optical fiber is always constrained by the arc-shaped limiting groove, the movable end of the clamping seat and the clamping plate during the electrode spacing adjustment, reducing the axial movement, radial offset and clamping deviation caused by step adjustment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a precision positioning fixture for fiber optic assembly according to the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of a precision positioning fixture for fiber optic assembly according to the present invention. Figure 2 ;

[0027] Figure 3 This is a front view of a precision positioning fixture for fiber optic assembly according to the present invention;

[0028] Figure 4 This is a schematic diagram of the interior of the first housing of the present invention;

[0029] Figure 5 This is the present invention. Figure 1 Enlarged view of point A;

[0030] Figure 6 This is a schematic diagram of the clamping seat of the present invention;

[0031] Figure 7 This is the present invention. Figure 2 Enlarged view of point B;

[0032] Figure 8 This is a schematic diagram of the interior of the second housing of the present invention.

[0033] Reference numerals: 1. Positioning clamping mechanism; 2. Worktable; 3. Drive motor; 4. Bidirectional lead screw with forward and reverse threads; 5. First slider; 6. Fixed seat; 7. Electrode rod; 8. First swing rod; 9. Second slider; 10. Clamping seat; 11. Arc-shaped limiting groove; 12. Bending rod; 13. First strip groove; 14. Second strip groove; 15. U-shaped frame; 16. First housing; 17. First rack plate; 18. First rotating tooth; 19. Second rack plate; 20. Clamping plate; 21. 22. Pre-treatment cleaning mechanism; 23. Conveyor line; 24. Panel; 25. Cylinder; 26. Lifting rod; 27. Cover plate; 28. Camera; 29. ​​Second swing rod; 30. First moving rod; 31. Second moving rod; 32. Pressure roller; 33. Cleaning roller; 34. Brush bristles; 35. Synchronizing rod; 36. Third rack plate; 37. Second housing; 38. Second bevel gear; 39. Second bevel gear; 40. Rotating shaft; 41. Rotating rod; 42. Brush plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Reference manual attached Figure 1 To be continued Figure 8 As shown, this invention discloses a precision positioning fixture for optical fiber assembly, including a positioning fixture mechanism 1 and a pretreatment cleaning mechanism 21. The positioning fixture mechanism 1 is used to clamp, position, and align the electrodes of the optical fiber to be assembled. The pretreatment cleaning mechanism 21 is used to transport, compress, clean, and visually inspect the optical fiber before it enters the positioning process, thereby ensuring the positional stability and surface cleanliness of the optical fiber in the subsequent assembly process.

[0036] The positioning fixture mechanism 1 includes a worktable 2 mounted on a base plate, which serves as the mounting base for various clamping, transmission, and positioning components. A drive motor 3 is fixedly mounted on one side of the outer wall of the worktable 2. The output shaft of the drive motor 3 is fixedly connected to a two-way screw 4 with opposite threads via a coupling, ensuring that the rotational power output by the drive motor 3 is stably transmitted to the two-way screw 4. The two-way screw 4 is positioned along the width of the worktable 2. Two first sliders 5 are helically connected to both ends of the outer wall of the two-way screw 4. The two first sliders 5 can move synchronously in opposite directions when the two-way screw 4 rotates, thereby achieving movement that brings them closer together or further apart.

[0037] The bidirectional lead screw 4 includes a first threaded section and a second threaded section with opposite directions of rotation. Two first sliders 5 are threadedly engaged with the first threaded section and the second threaded section respectively, so that they can move synchronously towards or away from each other along the direction of the worktable 2 when the bidirectional lead screw 4 rotates.

[0038] A first strip groove 13 is formed along the width direction on the worktable 2, and a first slider 5 is slidably disposed within the first strip groove 13. The first strip groove 13 guides and limits the first slider 5, preventing it from swaying during movement and ensuring that its movement trajectory is consistent with the axis of the bidirectional lead screw 4. A fixing seat 6 is fixedly installed on the top of the first slider 5, and an electrode rod 7 is connected to the top of the fixing seat 6 by a limiting snap-fit ​​mechanism. The limiting snap-fit ​​structure facilitates the assembly and replacement of the electrode rod 7, while ensuring the axial position stability of the electrode rod 7 after installation. One end of the electrode rod 7 is electrically connected to the power supply. After the optical fiber to be assembled is clamped and positioned, the two electrode rods 7 can be adjusted to a suitable distance under the action of the drive motor 3 and the bidirectional lead screw 4 to meet the electrode alignment requirements during optical fiber assembly or splicing.

[0039] The fixed base 6 is an insulated fixed base, and the fixed base 6 is provided with a limiting step for restricting the axial movement of the electrode rod 7; the electrode rod 7 is connected to the power supply through a flexible high-voltage resistant wire. The flexible high-voltage resistant wire is reserved with bending allowance as it moves with the first slider 5, and is guided by a wire clamp set on the side of the workbench 2 to avoid the wire being pulled or interfering with the bidirectional lead screw 4 during the movement of the electrode rod 7.

[0040] Both ends of the outer wall of the first slider 5 are rotatably connected to a first swing rod 8, and the end of the first swing rod 8 away from the first slider 5 is rotatably connected to the second slider 9. A second strip groove 14 is formed along the length direction on the worktable 2, and the second slider 9 is slidably disposed in the second strip groove 14. The first swing rod 8 is used to convert the movement of the first slider 5 along the width direction of the worktable 2 into the movement of the second slider 9 along the length direction of the worktable 2. When the two first sliders 5 move synchronously in opposite directions under the action of the bidirectional lead screw 4, the first swing rod 8 swings accordingly, pushing or pulling the second slider 9 to reciprocate along the second strip groove 14. Through the cooperation of the first strip groove 13 and the second strip groove 14, the first slider 5 and the second slider 9 move stably in predetermined directions, thereby improving the accuracy of the transmission linkage.

[0041] A clamping seat 10 is provided between adjacent second sliders 9, and the clamping seat 10 is fixedly installed on the worktable 2. The clamping seat 10 adopts a telescopic movable structure, including a fixed part fixed on the worktable 2 and a movable end that can telescopically move relative to the fixed part. The connection between the clamping seat 10 and the worktable 2 is locked and fixed by a positioning pin, so that the clamping seat 10 remains stable during the clamping of the optical fiber and is not prone to overall displacement due to force. An arc-shaped limiting groove 11 is formed on the top of the clamping seat 10 along the length direction. The arc-shaped limiting groove 11 is adapted to the outer circumference shape of the optical fiber and is used to support the optical fiber and limit the displacement of the optical fiber in the radial direction. The second slider 9 is connected to the movable end of the clamping seat 10 by a bending rod 12. When the second slider 9 moves along the second strip groove 14, the bending rod 12 can drive the movable end of the clamping seat 10 to extend and retract synchronously, so that the clamping seat 10 initially clamps and limits the optical fiber.

[0042] The clamping seat 10 includes a fixed end, a movable end, and a reset elastic element. The fixed end is fixed to the worktable 2, and the movable end is slidably disposed on the fixed end along the width direction of the clamping seat 10 through the reset elastic element. The reset elastic element is disposed between the fixed end and the movable end.

[0043] A U-shaped frame 15 spans the clamping seat 10 and is fixedly mounted on the workbench 2. A first housing 16 is fixedly mounted at the bottom of the U-shaped frame 15. The first housing 16 is used to house the rack and gear transmission components and provides protection and guidance for the transmission components. The top of the bending rod 12 has an upwardly extending end, which is fixedly connected to a first rack plate 17, which extends into the interior of the first housing 16. The first rack plate 17 engages with a first rotating gear 18 located inside the first housing 16, and the first rotating gear 18 simultaneously engages with a second rack plate 19. The first rack plate 17 and the second rack plate 19 are arranged vertically, so that the horizontal movement of the first rack plate 17 can be converted into the vertical movement of the second rack plate 19 via the first rotating gear 18.

[0044] The outer edge of the first rotating tooth 18 is provided with a rotating groove that mates with the first housing 16. The first rotating tooth 18 rotates stably within the first housing 16 through the rotating groove. Movable holes are provided on the outer wall of the first housing 16 for the first rack plate 17 and the second rack plate 19 to pass through. These movable holes restrict the movement direction of the first rack plate 17 and the second rack plate 19, preventing skew during rack movement. The bottom of the second rack plate 19 penetrates the first housing 16 and extends to the clamping plate 20, which is located above the clamping seat 10. As the second rack plate 19 moves downward, the clamping plate 20 gradually approaches the clamping seat 10, forming a clamping cavity adapted to the optical fiber. When the optical fiber is located within the arc-shaped limiting groove 11, the clamping plate 20 presses the optical fiber downward from above, while the arc-shaped limiting groove 11 supports the optical fiber from below, thereby achieving vertical clamping and radial limiting of the optical fiber.

[0045] When using the positioning clamping mechanism 1, the optical fiber to be assembled is first placed in the arc-shaped limiting groove 11 at the top of the clamping seat 10, so that the optical fiber extends along the length of the clamping seat 10. Then, the drive motor 3 is started. The drive motor 3 drives the bidirectional lead screw 4 with positive and negative threads to rotate through the coupling. The bidirectional lead screw 4 drives the two first sliders 5 to move in opposite directions along the first strip groove 13. When the first sliders 5 move, on the one hand, they drive the fixed seat 6 and the electrode rod 7 to adjust their positions, so that the two electrode rods 7 are aligned with the optical fiber; on the other hand, the first swing rod 8 drives the second slider 9 to move along the second strip groove 14. The second slider 9 then drives the movable end of the clamping seat 10 to move through the bending rod 12. At the same time, the bending rod 12 drives the first rack plate 17 to move. The first rack plate 17 drives the second rack plate 19 to move downward through the first rotating tooth 18, so that the clamping plate 20 presses against the optical fiber. Thus, the optical fiber is clamped while the electrode rod 7 is adjusted, avoiding optical fiber misalignment caused by positioning before clamping or clamping before positioning, and improving the consistency of the optical fiber assembly position.

[0046] The pretreatment cleaning mechanism 21 is mounted on the workbench 2 and located on the conveying path before the optical fiber enters the positioning fixture mechanism 1. The pretreatment cleaning mechanism 21 includes a conveyor line 22, which is mounted on a frame and extends along the length of the frame. The conveyor line 22 carries and conveys the optical fiber to be processed, allowing the optical fiber to enter the cleaning and inspection area in a predetermined direction. A panel 23 is mounted around the top of the frame via brackets, and a cylinder 24 is fixedly mounted on the panel 23. A cover plate 26 is connected to the bottom of the piston rod of the cylinder 24 via a lifting rod 25, and the cover plate 26 is located above the conveyor line 22. When the cylinder 24 extends or retracts, it can move the lifting rod 25 and the cover plate 26 up and down, thereby moving the cover plate 26 closer to or further away from the optical fiber on the conveyor line 22.

[0047] A camera 27 is installed at the bottom of the cover plate 26, corresponding to the position of the optical fiber delivery. The camera 27 is electrically connected to a display on the panel 23. When the optical fiber is delivered to the bottom of the cover plate 26, the camera 27 can collect the surface condition and position of the optical fiber and transmit the image information to the display for display. This allows the operator to observe whether there are surface impurities, misalignment, warping, or abnormal position of the optical fiber, providing a basis for judgment for subsequent positioning and clamping.

[0048] A controller is also installed on panel 23. The image signal output terminal of camera 27 is connected to the controller, which is connected to conveyor line 22, cylinder 24, and drive motor 3. The controller is used to extract edges from the fiber optic image captured by camera 27 to obtain the fiber centerline, fiber outer diameter, and surface impurity area. It generates the target rotation angle of drive motor 3 based on fiber outer diameter, generates the stop position of conveyor line 22 based on fiber centerline offset, and controls cylinder 24 to repeatedly descend for cleaning based on surface impurity area. After the fiber centerline offset and impurity area both meet preset conditions, the controller controls drive motor 3 to drive bidirectional lead screw 4 to rotate, so that electrode rod 7, clamping seat 10, and clamping plate 20 simultaneously enter the positioning and clamping state.

[0049] Both sides of the outer wall of the lifting rod 25 are rotatably connected to second swing rods 28. One side of the second swing rod 28 is connected to the first moving rod 29, and the other side is connected to the second moving rod 30. The bottom of the first moving rod 29 is connected to a pressure roller 31 via a movable shaft, and the bottom of the second moving rod 30 is connected to a cleaning roller 32 via a movable shaft. Brush bristles 33 are glued and fixed to the outer wall of the cleaning roller 32. The two ends of the pressure roller 31 and the cleaning roller 32 are respectively mounted on the side walls of the first moving rod 29 and the second moving rod 30 via movable shafts, so that the pressure roller 31 and the cleaning roller 32 can rotate when in contact with the optical fiber, reducing hard friction with the optical fiber.

[0050] When cylinder 24 lowers lifting rod 25, lifting rod 25, via second swing rod 28, pushes first moving rod 29 and second moving rod 30 towards the optical fiber. First moving rod 29 drives pressure roller 31 to press down and adhere to the optical fiber, providing light pressure and limiting the fiber's position, ensuring stability during transport. Second moving rod 30 drives cleaning roller 32 towards the optical fiber. Cleaning roller 32 rolls in contact with the fiber surface during transport, and the bristles 33 on its outer wall remove dust, debris, and adhering impurities. The combined use of pressure roller 31 and cleaning roller 32 maintains stable fiber transport posture and improves fiber surface cleaning.

[0051] A third rack plate 35 is mounted on the outer wall of the first moving rod 29, away from the lifting rod 25, via a synchronizing rod 34. One end of the third rack plate 35 extends into the second housing 36 and meshes with the second rotating gear 37 for transmission. The top of the second housing 36 is fixed to the panel 23 by a mounting rod, ensuring the stability of the second housing 36 relative to the conveyor line 22. The central shaft of the second rotating gear 37 is fixedly connected to the first bevel gear 38. One end of the first bevel gear 38 is fixed to the side wall of the second housing 36 by a bearing, ensuring that the first bevel gear 38 can rotate smoothly relative to the second housing 36. The outer wall of the first bevel gear 38 meshes with the second bevel gear 39 for transmission. A rotating shaft 40 at the center of the second bevel gear 39 is connected to a rotating rod 41. An opening is provided on the outer wall of the second housing 36 to cooperate with the rotating shaft 40. The rotating shaft 40 extends through the opening to the outside of the second housing 36 and connects to the rotating rod 41. A brush plate 42 is mounted at the bottom of the rotating rod 41, and the brush plate 42 movably abuts against the optical fiber.

[0052] When the first moving rod 29 moves along with the lifting rod 25, it drives the third rack plate 35 to move synchronously via the synchronizing rod 34. The third rack plate 35 drives the second rotating gear 37 to rotate, which in turn drives the first bevel gear 38 to rotate synchronously. The first bevel gear 38 then drives the second bevel gear 39, which meshes with it, to rotate. The second bevel gear 39 drives the rotating rod 41 via the rotating shaft 40, causing the brush plate 42 to oscillate or rotate relative to the fiber surface for cleaning. The brush plate 42 can perform supplementary brushing on the fiber surface, working in conjunction with the cleaning roller 32 and bristles 33 to clean the fiber at multiple locations, thereby reducing impurities remaining on the fiber surface.

[0053] The working process of this embodiment is as follows: First, the optical fiber to be assembled is placed on the conveyor line 22 and conveyed along the length of the frame by the conveyor line 22. When the optical fiber reaches the cleaning detection area of ​​the pre-treatment cleaning mechanism 21, the cylinder 24 drives the lifting rod 25 to descend. The lifting rod 25 moves the cover plate 26 and the camera 27 closer to the optical fiber, and at the same time, the second swing rod 28 drives the first moving rod 29 and the second moving rod 30 to move. The pressure roller 31 presses and limits the optical fiber, and the cleaning roller 32 and the brush 33 roll and clean the surface of the optical fiber. The first moving rod 29 drives the brush plate 42 to perform auxiliary cleaning of the optical fiber through the synchronization rod 34, the third rack plate 35, the second rotating tooth 37, the first bevel gear 38, the second bevel gear 39, the rotating shaft 40 and the rotating rod 41. The camera 27 collects the surface of the cleaned optical fiber and the conveying position, and transmits the image to the display.

[0054] After preprocessing, the optical fiber enters the positioning fixture mechanism 1 and is placed in the arc-shaped limiting groove 11 at the top of the clamping seat 10. After starting the drive motor 3, the bidirectional lead screw 4 drives the two first sliders 5 to move in opposite directions. The first sliders 5 drive the electrode rods 7 to adjust their spacing, aligning the electrode rods 7 with the position of the optical fiber to be processed. Simultaneously, the first sliders 5 drive the second slider 9 to move via the first swing rod 8. The second slider 9 drives the movable end of the clamping seat 10 to move via the bending rod 12, and drives the clamping plate 20 to press down via the first rack plate 17, the first rotating tooth 18, and the second rack plate 19. The clamping plate 20 and the clamping seat 10 together form a clamping cavity, stably clamping the optical fiber within the arc-shaped limiting groove 11. After the optical fiber is clamped, the electrode rods 7 are energized and cooperate with the optical fiber assembly process.

[0055] The controller has a pre-stored mapping relationship between the outer diameter of the optical fiber and the target rotation angle of the drive motor 3. This mapping relationship causes the spacing of the electrode rods 7, the extension and retraction of the movable end of the clamping seat 10, and the downward pressure of the clamping plate 20 to change synchronously with the same target rotation angle. When the camera 27 detects that the offset of the optical fiber centerline is greater than the first threshold, the controller controls the conveyor line 22 to adjust its stop position or pause entering the positioning fixture mechanism 1. When the camera 27 detects that the surface impurity area is greater than the second threshold, the controller controls the cylinder 24 to drive the pressure roller 31, cleaning roller 32, and brush plate 42 to descend and clean again. Only when the offset of the optical fiber centerline is not greater than the first threshold and the surface impurity area is not greater than the second threshold, does the controller control the drive motor 3 to perform the positioning and clamping action.

[0056] With the above structure, this embodiment can complete the position adjustment of electrode rod 7, lateral positioning of optical fiber, and vertical clamping of optical fiber under the action of the same driving source, reducing the number of independent adjustment mechanisms and improving the consistency of fixture actions. At the same time, the pre-treatment cleaning mechanism 21 can complete the clamping, cleaning, and visual inspection before the optical fiber enters the clamping and positioning, reducing the impact of dust, lint, and positional deviation on the optical fiber assembly accuracy, and is suitable for optical fiber assembly scenarios with high requirements for positioning accuracy and assembly stability.

[0057] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0058] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to only certain specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A precision positioning fixture for optical fiber assembly, characterized in that, include: The positioning clamp mechanism (1) includes a worktable (2) placed on a base plate. A drive motor (3) is installed on one side of the outer wall of the worktable (2). The output shaft of the drive motor (3) extends to a bidirectional lead screw (4) with forward and reverse teeth. Both ends of the bidirectional lead screw (4) have a first slider (5) that moves in the opposite direction. A fixed seat (6) is installed on the top of the first slider (5). An electrode rod (7) is connected to the top of the fixed seat (6) by a limiting snap-fit. One end of the electrode rod (7) is electrically connected to a power source. The first slider (5) has a second slider (9) connected to both ends of its outer wall via a first swing rod (8), and a clamping seat (10) fixed on the worktable (2) is provided between adjacent second sliders (9). The clamping seat (10) includes a fixed end, a movable end and a reset elastic element. The fixed end is fixed to the worktable (2), and the movable end is slidably disposed on the fixed end along the width direction of the clamping seat (10) via the reset elastic element. The top of the clamping seat (10) has an arc-shaped limiting groove (11) for supporting and radially limiting the optical fiber. The second slider (9) and the movable end on the clamping seat (10) are connected by a bending rod (12).

2. The precision positioning fixture for optical fiber assembly according to claim 1, characterized in that, The output shaft of the drive motor (3) and the bidirectional lead screw (4) with positive and negative teeth are fixedly connected by a coupling. The worktable (2) is provided with a first strip groove (13) extending in the width direction and a second strip groove (14) extending in the length direction. The first slider (5) is slidably disposed in the first strip groove (13) and the second slider (9) is slidably disposed in the second strip groove (14). The two ends of the first swing rod (8) are rotatably connected to the first slider (5) and the second slider (9) respectively. A U-shaped frame (15) spanning the clamping seat (10) is provided above the clamping seat (10). The bottom of the U-shaped frame (15) is fixedly installed with a first housing (16).

3. The precision positioning fixture for optical fiber assembly according to claim 2, characterized in that, The top extension of the bending rod (12) is fixedly connected to a first rack plate (17) extending into the first housing (16). The outer wall of the first rack plate (17) is driven by a second rack plate (19) through a first rotating tooth (18). The first rack plate (17) and the second rack plate (19) are arranged vertically. The bottom of the second rack plate (19) penetrates the first housing (16) and extends to the clamping plate (20). A clamping cavity for accommodating and clamping optical fibers is formed between the clamping plate (20) and the clamping seat (10).

4. The precision positioning fixture for optical fiber assembly according to claim 3, characterized in that, The outer edge of the first rotating tooth (18) is provided with a rotating groove that connects to the first housing (16). The outer wall of the first housing (16) is provided with movable holes for the first rack plate (17) and the second rack plate (19) to pass through and guide their movement direction. The clamping seat (10) and the worktable (2) are connected by locking and fixing with a positioning pin.

5. The precision positioning fixture for optical fiber assembly according to claim 1, characterized in that, It also includes a pre-treatment cleaning mechanism (21), which includes a conveyor line (22) placed on a workbench (2). The conveyor line (22) is installed on a frame and extends along the length of the frame to carry and transport optical fibers. Panels (23) are installed around the top of the frame via brackets. Cylinders (24) are fixedly installed on the panels (23). The bottom of the piston rod on the cylinder (24) is connected to a cover plate (26) via a lifting rod (25). A camera (27) is installed at the bottom of the cover plate (26) and is adapted to it. The signal output end of the camera (27) is connected to a controller, and the controller is connected to a display to output the optical fiber image or processing result acquired by the camera (27) to the display.

6. The precision positioning fixture for optical fiber assembly according to claim 5, characterized in that, The lifting rod (25) has a first moving rod (29) and a second moving rod (30) connected to both sides of its outer wall via a second swing rod (28). The bottom of the first moving rod (29) and the second moving rod (30) are respectively movably connected to a pressure roller (31) and a cleaning roller (32) that are in contact with the optical fiber. The outer wall of the cleaning roller (32) is glued and fixed with bristles (33), and both ends of the pressure roller (31) and the cleaning roller (32) are connected to the side walls of the first moving rod (29) and the second moving rod (30) via movable shafts.

7. A precision positioning fixture for optical fiber assembly according to claim 6, characterized in that, A third rack plate (35) is installed on the outer wall side of the first moving rod (29) away from the lifting rod (25) via a synchronizing rod (34). One end of the third rack plate (35) meshes with a second rotating tooth (37) on the inner wall of the second housing (36). The central axis of the second rotating tooth (37) is fixed on the first bevel gear (38). The outer wall of the first bevel gear (38) meshes with a second bevel gear (39). One end of the rotating shaft (40) at the center of the second bevel gear (39) is connected to a rotating rod (41) extending to the outside of the second housing (36). A brush plate (42) that movably abuts against the optical fiber is installed at the bottom of the rotating rod (41).

8. The precision positioning fixture for optical fiber assembly according to claim 7, characterized in that, The top of the second housing (36) is fixed to the panel (23) by a mounting rod. The side wall of the second housing (36) is provided with a shaft hole for the rotating shaft (40) to pass through. One end of each of the second swing rods (28) is rotatably connected to the lifting rod (25). The other end of one of the second swing rods (28) is rotatably connected to the first moving rod (29), and the other end of the other second swing rod (28) is rotatably connected to the second moving rod (30). One end of the first bevel gear (38) is fixed to the side wall of the second housing (36) by a bearing.

9. A precision positioning fixture for optical fiber assembly according to claim 5, characterized in that, The panel (23) is equipped with a controller. The signal output terminal of the camera (27) is connected to the controller. The controller is connected to the conveyor line (22), the cylinder (24) and the drive motor (3) respectively. The controller is used to extract the edge of the fiber image acquired by the camera (27), obtain the fiber center line, the fiber outer diameter and the surface impurity area, generate the target rotation angle of the drive motor (3) according to the fiber outer diameter, generate the stop position of the conveyor line (22) according to the fiber center line offset, and control the cylinder (24) to repeatedly descend and clean according to the surface impurity area.

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