A multi-axis optical fiber butt joint jig with coincident intersection

Abstract

The application discloses a kind of intersection coincident multi-axis optical fiber butt joint fixture, including machine table, fixed seat and translation mechanism being arranged on machine table.First, second angle fine adjustment assembly is sequentially installed on translation mechanism, clamping component is connected to the end of second angle fine adjustment assembly, for suspending clamping upper ferrule.First rotation axis and second rotation axis orthogonally intersect in space, and with fixed seat center axis line common precision intersection in same butt joint reference point;At the same time, the center axis line of the clamping component can coincide with first rotation axis in space.The application completely decouples translation addressing and attitude rotation from kinematic geometry, so that the upper ferrule end face is anchored on reference point and deflected in situ, eliminating position interference and arc swing during adjustment, greatly improving the precision and efficiency of optical fiber butt joint.

Description

Technical Field

[0001] This invention relates to the field of precision assembly and alignment equipment technology for optical communication devices, specifically a multi-axis optical fiber docking fixture with overlapping intersection points. Background Technology

[0002] In the production and packaging of optical communication devices, the mating assembly of fiber optic connector ferrules typically requires high-precision position and orientation alignment to ensure efficient coupling of optical signals between the internal fibers. Since fiber core diameters are usually in the micrometer range, the assembly process often necessitates fine adjustments to the spatial position and angle of the ferrules using precision adjustment mechanisms. This ensures high-precision coaxiality of the central axes of the two ferrules to be mated and that the end faces of the ferrules meet micrometer-level alignment requirements.

[0003] In existing technologies, common assembly fixtures typically include translation mechanisms for achieving three-dimensional position adjustment, such as precision slides arranged along the X, Y, and Z axes. These slides are driven by screws to perform micrometer-level displacement adjustments, enabling precise alignment of the ferrule in space. Furthermore, some assembly equipment incorporates angle adjustment mechanisms on the translation mechanism to further adjust the ferrule's orientation angle.

[0004] However, in actual assembly, when simultaneous position and angle adjustments are required, existing multi-degree-of-freedom adjustment fixtures suffer from severe "coupling interference" defects: the rotation center (axis) of existing angle adjustment mechanisms is usually offset from the actual mating end face of the ferrule. Therefore, during fine-tuning of the angle, the ferrule end face inevitably oscillates around the distant rotation axis, which not only affects the original alignment, causing a consequent shift in the already aligned X / Y / Z spatial position, but also poses a significant risk of impact to the fragile ferrule end face. Operators are forced to repeatedly perform alternating trial and error of "adjusting position-adjusting angle-adjusting position again," greatly increasing the complexity of assembly and reducing efficiency.

[0005] Therefore, how to provide a multi-axis fiber optic docking fixture with a reasonable structure that can eliminate multi-axis adjustment interference, so as to achieve more stable, efficient and non-interfering alignment adjustment during the assembly process, remains a technical problem that needs further research and improvement by those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a multi-axis fiber optic splicing fixture with overlapping intersection points. This solves the problem that existing fixtures, due to the rotation center of angle adjustment being off-center from the ferrule splicing end face, are prone to swaying and positional coupling interference during fine-tuning of the angle, resulting in low efficiency from repeated trial and error.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-axis fiber optic splicing fixture with overlapping intersection points, comprising: Machine tool; A fixing seat is provided on the machine base for clamping the lower insert and has a fixing seat central axis extending along the Z-axis direction; A translation mechanism is mounted on the machine platform and located on one side of the fixed base, for providing spatial translation; A first angle fine-tuning component is mounted on the translation mechanism. It includes a first rotating disk, a first micrometer head that drives the first rotating disk to perform angle fine-tuning, and a first bracket. The central axis of the first rotating disk is a first rotation axis. The first bracket is fixedly connected to the end face of the first rotating disk off the first rotation axis and extends toward the fixed seat. The second angle fine-tuning component is mounted on the first bracket and includes a second rotating disk, a second micrometer head that drives the second rotating disk to perform angle fine-tuning, and a second bracket; the central axis of the second rotating disk is the second rotation axis; the second bracket is fixedly connected to the second rotating disk and extends towards the first rotation axis. A clamping assembly, connected to the second bracket, is used to clamp the upper insert. The clamping assembly has a central axis, which can coincide with the first rotation axis. The first rotation axis and the second rotation axis intersect orthogonally in space, and the first rotation axis, the second rotation axis and the central axis of the fixed base converge at the same docking reference point in space.

[0008] The above technical solution establishes a spatial reference zero point for fiber optic docking by limiting the first support to extend away from the first rotation axis and the second support to extend towards the first rotation axis, and by making the first rotation axis, the second rotation axis and the central axis of the fixed seat precisely intersect at the same docking reference point in spatial geometry.

[0009] Simultaneously, by ensuring that the central axis of the clamping assembly coincides with the first rotation axis, the upper ferrule, after being dynamically clamped and positioned, can accurately land its mating end face on the mating reference point. This configuration fundamentally decouples translational addressing from attitude rotational motion in terms of kinematics and geometry. During micron-level attitude fine-tuning of the fiber optic ferrule, the upper ferrule end face is physically anchored at this virtual intersection point for in-situ deflection (only the pitch or yaw angle changes), solving the fatal flaw of traditional fixtures where the ferrule end face swings in an arc and interferes with position during angle adjustment. This achieves true fixed-point attitude adjustment, significantly reducing the time spent on repeated trial-and-error compensation, and fundamentally avoiding fiber end face impact damage caused by blind adjustment, thus improving the assembly efficiency and yield of optical communication devices.

[0010] Preferably, the translation mechanism includes a first positioning slide fixedly connected to the machine base, a Y-axis slide slidably disposed on the first positioning slide, an X-axis slide slidably connected to the Y-axis slide, a fixed column fixedly connected to the X-axis slide, a second positioning slide fixedly connected to the fixed column, and a Z-axis slide slidably mounted on the second positioning slide; the first angle fine-tuning component is mounted on the Z-axis slide.

[0011] The above technical solution employs a translation mechanism with a combination of multiple sliding tables to achieve precise position adjustment of the upper insert in three-dimensional space. Simultaneously, a first angle fine-tuning component is set on the Z-axis sliding table, making angle adjustment and spatial position adjustment an integrated structure. During multi-degree-of-freedom adjustment, each adjustment direction is independent yet coordinated, thereby effectively improving the accuracy and stability of docking adjustment and reducing the complexity of repeated adjustments.

[0012] Preferably, the translation mechanism further includes multiple fine-tuning drive components; the multiple fine-tuning drive components respectively drive the X-axis slide, Y-axis slide and Z-axis slide; Each of the aforementioned fine-tuning drive components includes a base and a micrometer fixedly mounted on the base; The first positioning slide, the Y-axis slide, and the second positioning slide are all provided with mounting grooves that are adapted to the base, and the corresponding bases are respectively embedded in the mounting grooves; Each of the micrometers has its output end unidirectionally abutted against the end face of the corresponding X-axis slide, Y-axis slide, or Z-axis slide to drive the corresponding slide to make a small displacement adjustment in the corresponding direction.

[0013] The above technical solution effectively lowers the center of gravity of the fine-tuning drive assembly by creating recessed mounting slots on the first positioning slide, the Y-axis slide, and the second positioning slide, and embedding the micrometer base into these slots, resulting in a more compact overall structure. Combined with the transmission method where the micrometer output directly abuts against the corresponding slide end face, a smooth stepping thrust without lateral torsional force is achieved. This eliminates the inherent thread backlash and backlash error in traditional lead screw and nut drives, ensuring that each slide maintains extremely high linear positioning accuracy even under high-frequency fine-tuning.

[0014] Preferably, the translation mechanism further includes three locking components, with one locking component corresponding to one side of each of the Y-axis slide, the X-axis slide, and the Z-axis slide; each locking component includes a locking plate and a locking screw; the three locking plates are respectively fixedly connected to the sides of the first positioning slide, the Y-axis slide, and the second positioning slide; each locking plate has a strip-shaped hole extending along the sliding direction of the corresponding slide; each locking screw passes through the corresponding strip-shaped hole and is threaded to the side of the Y-axis slide, the X-axis slide, and the Z-axis slide, respectively, for locking the position of the corresponding slide in the tightened state.

[0015] The above technical solution involves providing corresponding locking components on the sides of the Y-axis slide, X-axis slide, and Z-axis slide, so that each slide can be locked after position adjustment, thereby forming an independent locking structure for each adjustment direction. Compared to methods that rely solely on fine-tuning drive components to maintain position, this structure can re-fix the slide position after adjustment, effectively preventing displacement caused by vibration, external force interference, or prolonged use. Through the cooperation of the locking plate and locking screw, tightening the locking screw applies pressure to the locking plate, pressing it against the side wall of the corresponding slide, thus achieving reliable locking without changing the original adjustment position. Because the locking plate has strip-shaped holes extending along the sliding direction of the slide, the locking components do not interfere with the sliding stroke during slide adjustment, ensuring that each slide still has a complete adjustment range in the unlocked state. Each locking component is correspondingly installed on a different slide, making the locking operations in each direction independent. In actual use, one or more axes can be selectively locked as needed, thereby improving the flexibility and control precision of the adjustment process.

[0016] Preferably, the first rotating disk is provided with a first positioning part, and the second rotating disk is provided with a second positioning part; The first micrometer head includes two first sub-micrometer heads, and the second micrometer head includes two second sub-micrometer heads; The two first sub-micrometers are located on both sides of the first positioning part, and the output end of each first sub-micrometer is unidirectionally abutted against the corresponding side of the first positioning part to drive the first rotating disk to make angle fine adjustments. The two second sub-micrometers are located on both sides of the second positioning part, and the output end of each second sub-micrometer is unidirectionally abutted against the corresponding side of the second positioning part to drive the second rotating disk to make angle fine adjustments.

[0017] The above technical solution involves setting positioning parts on the first and second rotating disks, and using two sub-micrometers located on either side of the positioning parts for driving. This allows the corresponding rotating disks to form a relative bidirectional force during angle adjustment. Compared to a single-sided driving method, this structure, through the coordinated operation of the two sub-micrometers, can create a pre-tight constraint on the rotating disks during adjustment, thereby effectively reducing transmission gaps and backlash errors, and improving the accuracy and response stability of angle fine-tuning. The output ends of each sub-micrometer are unidirectionally abutted against the corresponding side of the positioning part, transmitting only the pressing force during adjustment, avoiding reverse gaps or loosening. Since the two sub-micrometers are located on opposite sides of the positioning part, the angle of the rotating disk can be precisely controlled through alternating adjustment or micro-coordinated adjustment. The above-mentioned dual-sub-micrometer opposing drive not only improves the accuracy and stability of rotating disk angle adjustment but also effectively reduces the impact of gaps during adjustment, thereby improving the alignment accuracy and assembly consistency during fiber optic splicing.

[0018] Preferably, the clamping assembly includes a connecting block, a driving cylinder, and a pair of clamping claws; the connecting block is fixedly connected to the second bracket, and the driving cylinder is fixedly installed on the connecting block; the pair of clamping claws are arranged opposite to each other and connected to the power output end of the driving cylinder, and the driving cylinder is used to drive the pair of clamping claws to perform linear opening and closing movements toward each other or away from each other.

[0019] The above technical solution employs a drive cylinder to directly drive a pair of clamping claws in a linear opening and closing motion, either facing or moving away from each other. This gives the clamping action a clear linear guiding characteristic, effectively avoiding additional angular deviations introduced during clamping compared to swing-type or linkage-type clamping structures. This helps maintain the axial stability of the clamped insert. The pair of clamping claws are symmetrically arranged and synchronously driven by the same drive cylinder, ensuring that the clamping force is applied evenly on both sides. This allows the clamping force to automatically tend towards the center position during clamping, reducing offset or tilting problems caused by uneven force. By integrating the drive cylinder and clamping claws onto a connecting block and fixing them to the second bracket, the clamping assembly forms a unified structure. This ensures stable transmission of the clamping position during fine-tuning of the angle with the second bracket, avoiding cumulative errors caused by multi-stage connections and improving overall adjustment accuracy.

[0020] Preferably, each of the pair of clamping claws has a V-shaped positioning groove on its inner side facing each other; the two V-shaped positioning grooves are arranged opposite each other and together form a clamping channel for accommodating and positioning the upper insert.

[0021] The above technical solution cleverly utilizes the geometric convergence and physical guiding characteristics of the V-shaped inclined surface by setting two opposing V-shaped positioning grooves on the inner side of the clamping claw. At the instant the drive cylinder closes, the four inclined surfaces act together on the cylindrical upper insert surface, forming a stable four-point line contact, enabling forced radial compression and "self-centering" alignment of the upper insert. This structure automatically compensates for the outer diameter machining tolerances of different batches of inserts, ensuring that the actual physical center axis of the upper insert is forcibly pulled back and strictly coincides with the theoretical design axis of the equipment.

[0022] Preferably, the fixing base includes a support column fixed to the machine base and a locking block; the top of the support column is provided with a positioning groove, and one end of the locking block is hinged to the top of the support column, so that the locking block can be flipped relative to the support column to cover or open the positioning groove.

[0023] The above technical solution utilizes a hinged locking block with a flip-top structure for the mounting base. This feature provides a completely open top operating space for placing and removing the lower insert, allowing operators to directly insert the insert into the positioning slot, avoiding the problem of scratching the insert end face that is common with traditional perforated bases. Furthermore, the locking block, when closed, provides a uniform downward clamping force, firmly pressing the lower insert into the positioning slot, perfectly balancing the convenience of frequent quick-change operations with extremely high locking stability.

[0024] Preferably, the fixing column includes a horizontal base plate, a vertical back plate, and a reinforcing rib connecting the horizontal base plate and the vertical back plate; the horizontal base plate is fixedly connected to the top surface of the X-axis slide, and the front surface of the vertical back plate is connected to the second positioning slide; the reinforcing rib is a right-angled triangle and is supported in the right-angled area between the horizontal base plate and the vertical back plate.

[0025] The above technical solution employs a support structure for the fixed column, comprising a horizontal base plate, a vertical back plate, and right-angled triangular reinforcing ribs. These ribs, supported within the right-angled region between the horizontal base plate and the vertical back plate, significantly increase the fixed column's bending section modulus, effectively enhancing the load-bearing stiffness of the Z-axis slide and its mounted components. During actual alignment and adjustment, these reinforcing ribs effectively resist lateral thrust and the overturning moment generated by the gravity of the upper dual-angle micro-adjustment components, preventing microscopic backward bending or swaying deformation of the fixed column. This ensures the spatial accuracy of the moving components mounted on it, improving the overall stability and alignment precision of multi-axis translation.

[0026] Preferably, the first bracket has an L-shaped structure, including a clearance extension arm and a bending mounting arm; one end of the clearance extension arm is fixedly connected to the end face of the first rotating disk away from the first rotation axis, and the other end is fixedly connected to one end of the bending mounting arm; the second angle fine-tuning component is installed at the other end of the bending mounting arm; the clearance extension arm and the inner bending area of ​​the bending mounting arm form a space clearance area for accommodating the clamping component.

[0027] Through the above technical solution: the first support adopts an L-shaped structure including a clearance extension arm and a bent mounting arm, forming an inwardly recessed clearance area between the first rotating disk and the second angle fine-tuning component. This design allows the clamping component and the upper insert to be docked to smoothly extend into the clearance area, avoiding physical collisions and motion interference between the insert or clamping mechanism and the end face of the rotating disk. At the same time, this clearance structure allows the end face of the upper insert to accurately pass through the outer contour of the rotating disk and precisely extend to the orthogonal intersection point of the first and second rotation axes, mechanically ensuring the smooth realization of the multi-axis intersection point coincidence adjustment method and improving the reliability of the equipment in multi-degree-of-freedom linkage within a confined space.

[0028] This invention provides a multi-axis fiber optic splicing fixture with overlapping intersection points. It offers the following advantages: 1. This invention establishes a static reference zero point for fiber optic cable docking by arranging the first rotation axis, the second rotation axis, and the central axis of the fixing base to converge at the same docking reference point in space. Simultaneously, the dynamic design, where the central axis of the clamping assembly coincides with the first rotation axis, completely decouples the linkage between translation and attitude rotation from a kinematic geometry perspective. During attitude fine-tuning, after the upper ferrule of the dynamically clamped device is aligned in place, its docking end face is anchored by physical laws at this virtual rotation intersection point, resulting in only in-situ angular deflection. This feature eliminates the arc swing and position coupling interference phenomena caused by the rotation center deviating from the ferrule end face in traditional equipment, achieving true fixed-point attitude adjustment. This not only greatly reduces the number of repeated trial and error attempts and significantly improves alignment efficiency, but also fundamentally avoids the risk of impact to fragile end faces caused by blind position adjustment.

[0029] 2. This invention improves the accuracy and stability of three-dimensional spatial position adjustment through the cooperation of the translation mechanism and the lateral locking component. The independent X, Y, and Z-axis slide table stacking architecture, combined with the fine-tuning drive component embedded in the base, achieves smooth, micron-level linear displacement without backlash error. Simultaneously, the fixed column with right-angled triangular reinforcing ribs effectively prevents microscopic backward deformation when bearing cantilever components and micrometer thrust. Furthermore, the side strip hole locking mechanism, after fine-tuning, applies uniform clamping force to the side of the slide table using a locking plate, perfectly replacing the shortcomings of traditional single-point set screw locking, which easily leads to lateral displacement or positional slippage of the slide table. The synergistic effect of the chassis and locking system completely eliminates sliding gaps, providing an extremely stable translation reference for high-precision fiber optic splicing.

[0030] 3. This invention utilizes a cylinder-driven double V-shaped positioning groove structure and an L-shaped spatial clearance cantilever to effectively resolve the contradiction between precision clamping and spatial motion interference. The two opposing V-shaped positioning grooves apply a uniform radial compressive force to the surface of the upper insert at the moment of closure, achieving rapid automated clamping and forced self-centering alignment, automatically compensating for outer diameter machining tolerances, and ensuring strict coaxiality of the upper and lower insert axes. Simultaneously, the first bracket recesses inward to form a dedicated spatial clearance area, successfully overcoming the physical obstruction of the first rotating disk, allowing the clamping assembly and the upper insert to penetrate deeply into the spatial intersection without collision. This design ensures high-precision alignment while avoiding physical interference from multi-axis linkages, balancing material change convenience and assembly reliability. Attached Figure Description

[0031] Figure 1 This is a three-dimensional view of the overall structure of a multi-axis fiber optic docking fixture with overlapping intersection points according to the present invention. Figure 2 This is a perspective view of the multi-axis fiber optic docking fixture of the present invention (showing the first and second fine-tuning components). Figure 3 This is a three-dimensional structural view of the translation mechanism and the fixed column of the present invention; Figure 4 for Figure 1 A magnified schematic diagram of the partial structure at point A in the middle; Figure 5 for Figure 3 A magnified schematic diagram of the local structure at point B; Figure 6 for Figure 2 A magnified schematic diagram of the structure at point C in the middle; Explanation of reference numerals in the attached figures: 1. Machine base; 2. Fixed base; 21. Support column; 211. Positioning groove; 22. Locking block; 3. Translation mechanism; 31. First positioning slide; 32. Y-axis slide; 33. X-axis slide; 34. Fixed column; 341. Horizontal base plate; 342. Vertical back plate; 343. Reinforcing rib; 35. Second positioning slide; 36. Z-axis slide; 37. Fine-tuning drive assembly; 371. Base; 372. Micrometer; 38. Mounting groove; 39. Locking assembly; 391. Locking plate; 392. Locking screw; 393. Strip hole; 4. First angle fine-tuning assembly; 41. First 42. Rotary disk; 42. First micrometer head; 421. First sub-micrometer head; 43. First bracket; 431. Avoidance extension arm; 432. Bending mounting arm; 44. First positioning part; 5. Second angle fine adjustment assembly; 51. Second rotary disk; 52. Second micrometer head; 521. Second sub-micrometer head; 53. Second bracket; 54. Second positioning part; 6. Clamping assembly; 61. Connecting block; 62. Drive cylinder; 63. Clamping claw; 631. V-shaped positioning groove; L1. Central axis of fixed seat; L2. First rotation axis; L3. Second rotation axis; L4. Central axis of clamping assembly. Detailed Implementation

[0032] The technical solutions in 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.

[0033] See attached document Figures 1 to 6 As shown, a multi-axis fiber optic splicing fixture with overlapping intersection points is mainly used in the assembly process of optical communication devices to perform micron-level spatial orientation adjustment and coaxiality alignment of the ferrules to be spliced. The fixture as a whole includes: a machine base 1, a fixed base 2, a translation mechanism 3, a first angle fine-tuning component 4, a second angle fine-tuning component 5, and a clamping component 6.

[0034] The machine base 1 serves as the high-rigidity physical base of the entire machine; the fixed base 2 is fixedly mounted on the machine base 1 for clamping the lower insert and has a fixed base central axis L1 extending vertically along the Z-axis; the translation mechanism 3 is mounted on the machine base 1 and located on one side of the fixed base 2, for providing translational displacement in a three-dimensional rectangular coordinate system; the first angle fine-tuning component 4 is mounted on the translation mechanism 3; the second angle fine-tuning component 5 is mounted on the first bracket 43 and is mounted on the power output end of the translation mechanism 3 for fine-tuning the attitude angle of the upper insert at a fixed point; the clamping component 6 is connected to the end of the second angle fine-tuning component 5 for suspending and clamping the upper insert, and performs composite spatial linkage with the translation mechanism 3 and the fine-tuning component.

[0035] Specifically, the fixed base 2 includes a support column 21 mounted on the machine base 1 by bolts or fasteners, and a locking block 22 that cooperates with the support column 21. The top of the support column 21 is machined with a positioning groove 211 for accommodating the lower insert; one end of the locking block 22 is hinged to one side of the top of the support column 21, allowing the locking block 22 to flip upwards relative to the support column 21. This flip-top hinge structure provides a completely uninterrupted open operating space for the placement and removal of the lower insert. In the working closed state, the bottom plane of the locking block 22 applies a uniform and vertically downward clamping force to the lower insert located in the positioning groove 211, stably fixing it within the positioning groove 211 and ensuring that the central axis of the lower insert is tightly coincident with the central axis L1 of the fixed base and remains stationary throughout the entire alignment process.

[0036] The translation mechanism 3 includes a first positioning slide 31, a Y-axis slide 32, an X-axis slide 33, a fixed column 34, a second positioning slide 35, and a Z-axis slide 36. In terms of connection and assembly, the first positioning slide 31 is fixedly connected to the machine base 1; the Y-axis slide 32 is slidably mounted on the first positioning slide 31; the X-axis slide 33 is slidably connected to the Y-axis slide 32, together forming a bidirectional XY moving base in the horizontal plane. The fixed column 34 is fixedly connected to the top surface of the X-axis slide 33; the fixed column 34 includes a horizontal base plate 341, a vertical back plate 342, and reinforcing ribs 343. The horizontal base plate 341 is fixed to the X-axis slide 33, and the front surface of the vertical back plate 342 is connected to the second positioning slide 35; the reinforcing ribs 343 are solid right-angled triangles, welded or integrally formed to support the right-angled area between the horizontal base plate 341 and the vertical back plate 342, greatly improving the bending section modulus and overturning resistance. Finally, the Z-axis slide 36 is slidably mounted on the vertical guide rail of the second positioning slide 35. Through the above-mentioned multi-stage independent sliding structure, position adjustment without interference in the X, Y, and Z directions is achieved; the first angle fine-tuning component 4 is mounted on the Z-axis slide 36.

[0037] Furthermore, to drive the translation mechanism 3 to perform micrometer-level movements, the translation mechanism 3 also includes multiple fine-tuning drive components 37, corresponding to drive the X-axis, Y-axis, and Z-axis slides respectively. Each fine-tuning drive component 37 includes a base 371 and a precision micrometer 372 fixedly mounted on the base 371. The first positioning slide 31, the Y-axis slide 32, and the second positioning slide 35 are all provided with recessed mounting grooves 38 that are adapted to the shape of the base 371, and each base 371 is respectively embedded in the corresponding mounting groove 38. The micrometer output end of each micrometer 372 unidirectionally abuts against the end face of the corresponding X-axis, Y-axis, or Z-axis slide, driving the corresponding slide to perform micro-displacement adjustment with smooth thrust.

[0038] To ensure absolute stability after adjustment, the translation mechanism 3 is also equipped with three independently operating locking components 39. A locking component 39 is provided on one side of each of the Y-axis slide 32, X-axis slide 33, and Z-axis slide 36. Each locking component 39 includes a locking plate 391 and a locking screw 392. The three locking plates 391 are fixedly connected to the stationary end of each sliding pair (i.e., the sides of the first positioning slide 31, Y-axis slide 32, and second positioning slide 35); each locking plate 391 has a slotted hole 393 extending along the corresponding slide's sliding direction. Each locking screw 392 passes through the corresponding slotted hole 393 and is screwed into the side of the Y-axis, X-axis, and Z-axis slides respectively. In the tightened state, the locking plates 391 apply lateral frictional pressure to the sides of the slides through large-area surface contact, perfectly replacing traditional single-point set screw locking, effectively preventing slide deviation and firmly locking its spatial coordinates.

[0039] The first angle fine-tuning component 4 includes a first rotating disk 41, a first micrometer head 42, and a first bracket 43. The first rotating disk 41 is rotatably mounted on the Z-axis slide 36, and the central axis of the first rotating disk 41 is the first rotation axis L2. The first bracket 43 has an irregular L-shaped structure, which includes an avoidance extension arm 431 and a bending mounting arm 432. One end of the avoidance extension arm 431 is offset from the first rotation axis L2 and fixedly connected to the end face of the first rotating disk 41, and the other end is perpendicularly fixedly connected to one end of the bending mounting arm 432 and extends towards the fixed base 2.

[0040] The second angle fine-tuning component 5 is mounted on the other end of the bending mounting arm 432, and includes a second rotating disk 51, a second micrometer head 52, and a second bracket 53. The second rotating disk 51 is rotatably mounted on the other end of the bending mounting arm 432; the central axis of the second rotating disk 51 is the second rotation axis L3; the second bracket 53 is fixedly connected to the second rotating disk 51 and extends towards the first rotation axis L2. An inward recess is formed between the clearance extension arm 431 and the bending mounting arm 432, creating a space clearance area for properly accommodating the front clamping component 6.

[0041] In this embodiment, a first positioning part 44 and a second positioning part 54 protruding radially outward are respectively provided on the circumferential sidewalls of the first rotating disk 41 and the second rotating disk 51. The first positioning part 44 is preferably a rigid protrusion integrally milled with the disk body of the first rotating disk 41, and the second positioning part 54 is preferably a rigid protrusion integrally milled with the disk body of the second rotating disk 51. Both have flat and parallel force-bearing contact surfaces formed by precision machining on both sides. The first micrometer head 42 includes two first sub-micrometer heads 421, and the second micrometer head 52 includes two second sub-micrometer heads 521. The unidirectional spring reset design is abandoned, and a rigid, top-facing dual-sub-micrometer head structure is adopted.

[0042] In the specific mechanical engagement, the two sub-micrometer heads corresponding to the same rotating disk are located on both sides of their respective positioning parts. Specifically, the two first sub-micrometer heads 421 are located on both sides of the first positioning part 44, and their output ends are rigidly abutted against the flat side surface of the first positioning part 44 in one direction. Similarly, the two second sub-micrometer heads 521 are located on both sides of the second positioning part 54, and their output ends are rigidly abutted against the flat side surface of the second positioning part 54 in one direction. Through the differential coordinated adjustment of the operator by "rotating one side forward and the other side backward," a bidirectional rigid constraint is formed on each rotating disk, completely eliminating the backlash in the mechanical transmission and achieving high-precision angle fine adjustment without hysteresis.

[0043] The clamping assembly 6 is suspended from the front end of the second bracket 53 and has a central axis L4. It includes a connecting block 61, a drive cylinder 62, and a pair of clamping claws 63. The connecting block 61 is fixedly connected to the second bracket 53, and the drive cylinder 62 is fixedly mounted on the connecting block 61. The pair of clamping claws 63 are arranged opposite each other and connected to the power output end of the drive cylinder 62. The drive cylinder 62 drives the clamping claws 63 to perform linear opening and closing movements towards or away from each other. In a preferred embodiment, the inner surfaces of the pair of clamping claws 63 are each precision-machined with V-shaped positioning grooves 631. The two V-shaped positioning grooves 631 are arranged opposite each other to form a clamping channel. At the moment of closure, the inclined plane compression characteristic is used to force radial guidance and centering of the upper insert to be mated, ensuring that the physical axis of the upper insert is tightly coincident with the central axis L4 of the clamping assembly.

[0044] The key physical kinematics and anti-interference mechanism of this invention are as follows: the first rotation axis L2 and the second rotation axis L3 are strictly orthogonal in space; and the three physical straight lines, namely the first rotation axis L2, the second rotation axis L3, and the central axis L1 of the fixed base, precisely intersect at the same physical point in space, namely the "docking reference point". At the same time, the central axis L4 of the clamping component can coincide with the first rotation axis L2 in space.

[0045] In the specific work and alignment process: First, start the material preparation process. Place the lower insert in the positioning groove 211 of the fixed base 2 and press it with the locking block 22 to lock the lower reference. Then, place the upper insert between the clamping claws 63 of the clamping assembly 6, and start the drive cylinder 62 to bring the two V-shaped positioning grooves 631 closer to each other, forcing the physical axis of the upper insert to coincide with the central axis L4 of the clamping assembly.

[0046] The spatial translation and addressing stage then begins. The operator adjusts the micrometers 372 corresponding to the translation mechanism 3, driving the X-axis slide 33, Y-axis slide 32, and Z-axis slide 36 to translate within a Cartesian coordinate system. During this process, the upper insert undergoes three-dimensional displacement along with the overall mechanism until the upper insert end face gradually approaches the lower insert end face and completes initial alignment. At this point, the central axis L4 of the dynamic clamping assembly coincides with the first rotation axis L2, ensuring that the center point of the upper insert's end face to be docked falls precisely at the spatial "docking reference point" formed by the intersection of L1, L2, and L3.

[0047] Next, fine-tuning of the fixed-point attitude coupling is performed. When an angular deviation is detected between the upper and lower inserts, the operator uses the first micrometer head 42 and the second micrometer head 52 to differentially adjust the first rotating disk 41 and the second rotating disk 51. Thanks to the physical law of three-line intersection and dynamic-static decoupling, when adjusting the pitch or yaw angle of the upper insert, its end face is always anchored to the docking reference point by physical principles and rotates in place. This kinematic characteristic completely avoids the cascading swing interference caused by angle adjustment to the spatial position, so that the position alignment remains constant during the angle adjustment process, thereby achieving efficient one-time alignment.

[0048] Those skilled in the art should understand that the micrometer or micrometer head used for driving in the above embodiments are merely examples. Under the requirements of fully automated production, they can be equivalently replaced by a motor-driven push rod or a piezoelectric ceramic actuator controlled by a program. Such changes in driving methods do not depart from the technical concept of the present invention.

Claims

1. A multi-axis fiber optic splicing fixture with overlapping intersection points, characterized in that, include: Machine (1); A fixed base (2) is provided on the machine base (1) for clamping the lower insert core and has a fixed base center axis (L1) extending along the Z-axis direction; Translation mechanism (3) is provided on the machine base (1) and located on one side of the fixed base (2) for providing spatial translation; The first angle fine-tuning component (4) is installed on the translation mechanism (3), and includes a first rotating disk (41), a first micrometer head (42) for driving the first rotating disk to perform angle fine-tuning, and a first bracket (43); the central axis of the first rotating disk (41) is the first rotation axis (L2); the first bracket (43) is fixedly connected to the end face of the first rotating disk (41) off the first rotation axis (L2) and extends toward the fixed seat (2); The second angle fine-tuning component (5) is mounted on the first bracket (43) and includes a second rotating disk (51), a second micrometer head (52) that drives the second rotating disk to perform angle fine-tuning, and a second bracket (53); the central axis of the second rotating disk (51) is the second rotation axis (L3); the second bracket (53) is fixedly connected to the second rotating disk (51) and extends toward the first rotation axis (L2); A clamping assembly (6) is connected to the second bracket (53) for clamping the upper insert. The clamping assembly (6) has a clamping assembly central axis (L4), and the clamping assembly central axis (L4) can coincide with the first rotation axis (L2). The first rotation axis (L2) and the second rotation axis (L3) intersect orthogonally in space, and the first rotation axis (L2), the second rotation axis (L3) and the central axis (L1) of the fixed seat converge at the same docking reference point in space.

2. The multi-axis fiber optic splicing fixture with overlapping intersection points according to claim 1, characterized in that, The translation mechanism (3) includes a first positioning slide (31) fixedly connected to the machine base (1), a Y-axis slide (32) slidably disposed on the first positioning slide (31), an X-axis slide (33) slidably connected to the Y-axis slide (32), a fixed column (34) fixedly connected to the X-axis slide (33), a second positioning slide (35) fixedly connected to the fixed column (34), and a Z-axis slide (36) slidably mounted on the second positioning slide (35); the first angle fine adjustment component (4) is mounted on the Z-axis slide (36).

3. The multi-axis fiber optic splicing fixture with overlapping intersection points according to claim 2, characterized in that, The translation mechanism (3) further includes multiple fine-tuning drive components (37); the multiple fine-tuning drive components (37) respectively drive the X-axis slide (33), Y-axis slide (32) and Z-axis slide (36); Each of the aforementioned fine-tuning drive components (37) includes a base (371) and a micrometer (372) fixedly mounted on the base (371); The first positioning slide (31), the Y-axis slide (32) and the second positioning slide (35) are all provided with mounting grooves (38) that are adapted to the base (371), and the corresponding bases (371) are respectively embedded in the mounting grooves (38); Each of the micrometers (372) has its output end unidirectionally abutted against the end face of the corresponding X-axis slide (33), Y-axis slide (32) or Z-axis slide (36) to drive the corresponding slide to make a small displacement adjustment in the corresponding direction.

4. The multi-axis fiber optic splicing fixture with overlapping intersection points according to claim 2, characterized in that, The translation mechanism (3) further includes three locking components (39). Each of the Y-axis slide (32), the X-axis slide (33), and the Z-axis slide (36) is provided with a corresponding locking component (39). Each locking component (39) includes a locking plate (391) and a locking screw (392). The three locking plates (391) are respectively fixedly connected to the sides of the first positioning slide (31), the Y-axis slide (32), and the second positioning slide (35). Each locking plate (391) is provided with a strip hole (393) extending along the sliding direction of the corresponding slide. Each locking screw (392) passes through the corresponding strip hole (393) and is threadedly connected to the side of the Y-axis slide (32), the X-axis slide (33), and the Z-axis slide (36) to lock the position of the corresponding slide in the tightened state.

5. The multi-axis fiber optic splicing fixture with overlapping intersection points according to claim 1, characterized in that, The first rotating disk (41) is provided with a first positioning part (44), and the second rotating disk (51) is provided with a second positioning part (54); The first micrometer head (42) includes two first sub-micrometer heads (421), and the second micrometer head (52) includes two second sub-micrometer heads (521); The two first sub-micrometers (421) are located on both sides of the first positioning part (44), and the output end of each first sub-micrometer (421) is unidirectionally abutted against the corresponding side of the first positioning part (44) to drive the first rotating disk (41) to make angle fine adjustments. The two second sub-micrometers (521) are located on both sides of the second positioning part (54), and the output end of each second sub-micrometer (521) is unidirectionally abutted against the corresponding side of the second positioning part (54) to drive the second rotating disk (51) to make angle fine adjustments.

6. The multi-axis fiber optic docking fixture with overlapping intersection points according to claim 1, characterized in that, The clamping assembly (6) includes a connecting block (61), a driving cylinder (62), and a pair of clamping claws (63); the connecting block (61) is fixedly connected to the second bracket (53), and the driving cylinder (62) is fixedly installed on the connecting block (61); the pair of clamping claws (63) are arranged opposite to each other and connected to the power output end of the driving cylinder (62), and the driving cylinder (62) is used to drive the pair of clamping claws (63) to perform linear opening and closing movements in opposite directions or away from each other.

7. The multi-axis fiber optic splicing fixture with overlapping intersection points according to claim 6, characterized in that, Each pair of clamping claws (63) has a V-shaped positioning groove (631) on its opposite inner side; the two V-shaped positioning grooves (631) are arranged opposite to each other and together form a clamping channel for accommodating and positioning the upper insert.

8. The multi-axis fiber optic docking fixture with overlapping intersection points according to claim 1, characterized in that, The fixed base (2) includes a support column (21) fixed on the machine base (1) and a locking block (22); the top of the support column (21) is provided with a positioning groove (211), and one end of the locking block (22) is hinged to the top of the support column (21), so that the locking block (22) can be flipped relative to the support column (21) to cover or open the positioning groove (211).

9. The multi-axis fiber optic splicing fixture with overlapping intersection points according to claim 2, characterized in that, The fixed column (34) includes a horizontal base plate (341), a vertical back plate (342), and a reinforcing rib (343) connecting the horizontal base plate (341) and the vertical back plate (342); the horizontal base plate (341) is fixedly connected to the top surface of the X-axis slide (33), and the front surface of the vertical back plate (342) is connected to the second positioning slide (35); the reinforcing rib (343) is a right triangle and is supported in the right angle area between the horizontal base plate (341) and the vertical back plate (342).

10. The multi-axis fiber optic docking fixture with overlapping intersection points according to claim 1, characterized in that, The first bracket (43) has an L-shaped structure, including a clearance extension arm (431) and a bending mounting arm (432); one end of the clearance extension arm (431) is fixedly connected to the end face of the first rotating disk (41) off the first rotation axis, and the other end is fixedly connected to one end of the bending mounting arm (432); the second angle fine adjustment component (5) is installed on the other end of the bending mounting arm (432); the inner bending area of ​​the clearance extension arm (431) and the bending mounting arm (432) forms a space clearance area for accommodating the clamping component (6).

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