Adjusting mechanism for light spot beam combining device

Abstract

The utility model relates to the technical field of light spot beam combining device, concretely is a kind of adjusting mechanism for light spot beam combining device, including adjusting plate, support plate, installation bottom plate and support ball body;First adjusting screw and second adjusting screw are passed through and are provided on support plate, and the end of first adjusting screw and second adjusting screw is in abutment with the adjusting plate;First tension spring and second tension spring for providing the elastic recovery force opposite the thrust direction of first adjusting screw and second adjusting screw to adjusting plate are further equipped between adjusting plate, support plate;First tension spring, second tension spring and support ball body form triangular distribution;First tension spring is contained in first tension spring cavity and two ends are respectively connected with adjusting plate and support plate by first tension spring fixed pin and second tension spring fixed pin;Second tension spring is contained in second tension spring cavity and two ends are respectively connected with adjusting plate and support plate by third tension spring fixed pin and fourth tension spring fixed pin. Solve the problem of sticking and disc spring failure in traditional structure.

Description

Technical Field

[0001] This utility model relates to the field of light spot beam combining device technology, and in particular to an adjustment mechanism for a light spot beam combining device. Background Technology

[0002] Figure 8 The diagram shows a beam combining device. In this device, the first laser a, the second laser b, and the third laser c are converged into a lens mechanism g via adjustment mechanisms d, e, and f, respectively. Lens mechanism g generates a combined beam h. During beam combining, adjustment mechanisms d, e, and f need to adjust their angles to ensure that the first laser a, the second laser b, and the third laser c are collinear after reflection. In existing technologies, adjustment mechanisms d, e, and f are all... Figure 1 , Figure 2 The structure shown includes an adjusting plate 1, a support plate 2, and a mounting base plate 3 for mounting the adjusting plate 1 and the support plate 2. A support ball 4 is engaged between one corner of the bottom of the adjusting plate 1 and the support plate 2. A first adjusting screw 21, a second adjusting screw 23, a first fine-tuning bolt 25, and a second fine-tuning bolt 26 are threaded through the support plate 2. The first adjusting screw 21 and the second adjusting screw 23 abut against the adjusting plate 1 through the support plate 2. The first adjusting screw 21 and the second adjusting screw 23 are locked by the first fastening nut 22 and the second fastening nut 24, respectively, after the angle of the adjusting plate 1 is adjusted. The first fine-tuning bolt 25 and the second fine-tuning bolt 26 are arranged in a triangle with the support ball 4. The two first fine-tuning bolts 25 are sleeved in opposite directions inside the internal threaded cylinder 28 that passes through the adjusting plate 1 and the support plate 2. Several disc spring washers 27 are sleeved on the internal threaded cylinder 28. The disc spring washers 27 are distributed inside the adjusting plate 1 and the support plate 2, and provide cushioning during the adjustment of the first adjusting screw 21 and the second adjusting screw 23.

[0003] The installation angle of the optical lens 11 on the adjustment plate 1 is uncertain and has a large error, which leads to repeated adjustments of the angle of the adjustment plate 1 when multiple beams are combined. The adjustment mechanism uses a disc spring washer and a fine-tuning bolt for adjustment, but this adjustment method can cause the adjusting thread to jam when adjusted to the limit position. Over time, this will lead to a large error in the adjustment mechanism during debugging. As the core component providing the restoring force, the disc spring washer is under continuous pressure in the mechanism. After repeated adjustments and long-term material stress relaxation, its elastic modulus will decay, resulting in a decrease in the provided preload. This will directly manifest as "unable to push" or weak rebound, causing a gap between the adjustment plate and the adjustment screw, destroying the stability of the mechanism, and making it impossible to maintain the adjusted optical path state. In the above adjustment mechanism, the disc spring washer 27 will experience elastic fatigue after prolonged use, leading to easy elastic failure. After repeated adjustments, it will be unable to push, and because the disc spring has no elasticity, stable adjustment cannot be achieved.

[0004] Therefore, a device is needed to perform highly stable angle fine-tuning of the optical lens 11 on the adjustment plate 1, thereby achieving highly stable beam combining. Utility Model Content

[0005] The purpose of this invention is to design a device that can perform highly stable angle fine-tuning of the optical lenses on the adjustment plate, thereby achieving highly stable beam combining.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an adjustment mechanism for a beam combining device, comprising an adjustment plate, a support plate, a mounting base plate for mounting the support plate and the adjustment plate, and a support ball disposed between the adjustment plate and the support plate; a first adjustment screw and a second adjustment screw are disposed through the support plate, the ends of the first adjustment screw and the second adjustment screw abutting against the adjustment plate; a first fastening nut and a second fastening nut are respectively threaded onto the first adjustment screw and the second adjustment screw; a first tension spring and a second tension spring are also provided between the adjustment plate and the support plate for providing an elastic restoring force to the adjustment plate opposite to the pushing force of the first adjustment screw and the second adjustment screw; the first tension spring, the second tension spring and the support ball are arranged in a triangular configuration; the first tension spring is housed in a first tension spring cavity and its two ends are respectively engaged with the adjustment plate and the support plate through a first tension spring fixing pin and a second tension spring fixing pin; the second tension spring is housed in a second tension spring cavity and its two ends are respectively engaged with the adjustment plate and the support plate through a third tension spring fixing pin and a fourth tension spring fixing pin.

[0007] Preferably, the ends of the first adjusting screw and the second adjusting screw are first arc ends and second arc ends, and the first arc ends and the second arc ends form surface contact with the adjusting plate.

[0008] Preferably, the supporting sphere is a ceramic bead made of ceramic material.

[0009] Preferably, the first tension spring cavity includes a cavity one located in the support plate and a cavity two located in the adjustment plate; the cavity one is provided with a first slot for engaging the first tension spring fixing pin; the cavity two is provided with a second slot for engaging the second tension spring fixing pin.

[0010] Preferably, the second tension spring cavity includes a cavity three located in the support plate and a cavity four located in the adjustment plate; the cavity three is provided with a third slot for engaging the third tension spring fixing pin; the cavity four is provided with a fourth slot for engaging the fourth tension spring fixing pin.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: By using a tension spring instead of a disc spring to provide restoring force, the tension direction is stable, eliminating the risk of instability under pressure. The combination of the tension spring and the precision threaded adjusting screw ensures uniform force distribution and good linearity during adjustment, completely avoiding jamming at extreme positions caused by uneven structural force.

[0012] Under normal operating conditions, the tension spring is in a stretched state, and its fatigue life and stress relaxation resistance are far superior to those of a disc spring in a compressed state. The tension spring ensures that the mechanism can still provide continuous and stable preload after long-term use and multiple adjustments, effectively preventing changes in the optical path caused by the failure of elastic elements and ensuring the stability of the beam combining optical path.

[0013] The key components of the mechanism are made of titanium alloy, which has the characteristics of low thermal expansion coefficient, high specific strength and good corrosion resistance. This significantly reduces the structural deformation caused by changes in ambient temperature and humidity, enabling the adjustment mechanism to maintain high precision even in more demanding industrial environments.

[0014] By replacing the traditional steel ball support points with ceramic balls, the high hardness, high wear resistance, and low coefficient of friction of ceramics are utilized to reduce wear and creep at the support points, making the rotation fulcrum of the mechanism more stable and reliable, and further ensuring the repeatability accuracy of angle adjustment.

[0015] Based on the use of a locking nut, a secondary anti-loosening design is added to effectively combat vibrations during equipment operation and prevent the adjusting screw from loosening, thereby maintaining the precise angle of the optical lens for a long time. This invention solves the pain points of existing technologies, such as low adjustment efficiency, poor accuracy, easy jamming, and insufficient long-term stability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an adjustment mechanism in the prior art; Figure 2 This is a schematic cross-sectional view of the first fine-tuning bolt in an existing adjustment mechanism. Figure 3This is a three-dimensional structural diagram of the adjustment mechanism proposed in this utility model; Figure 4 for Figure 3 Schematic diagram of the AA section; Figure 5 for Figure 4 Another angle diagram; Figure 6 for Figure 3 Schematic diagram of the BB cross section; Figure 7 for Figure 3 Schematic diagram of the CC section; Figure 8 This is a schematic diagram illustrating the usage scenario of the adjustment mechanism; Explanation of reference numerals in the attached drawings: 1. Adjusting plate; 11. Optical lens; 12. First screw slot; 13. Cavity two; 131. Second slot; 14. First magnetic bead slot; 15. Cavity four; 151. Fourth slot; 16. Second screw slot; 2. Support plate; 21. First adjusting screw; 211. First arc end; 213. Second magnetic bead slot; 22. First fastening nut; 23. Second adjusting screw; 231. Second arc end; 24. Second fastening nut; 25. First... 26. Fine-tuning bolt; 27. Second fine-tuning bolt; 28. Disc spring washer; 29. ​​Internal threaded cylinder; 20. Fastening bolt; 210. Cavity 1; 2101. First slot; 212. Cavity 3; 2121. Third slot; 3. Mounting base plate; 4. Support ball; 5. First tension spring; 51. First tension spring fixing pin; 52. Second tension spring fixing pin; 6. Second tension spring; 61. Third tension spring fixing pin; 62. Fourth tension spring fixing pin; 7. First tension spring cavity; 8. Second tension spring cavity. Detailed Implementation

[0017] To address the problems in the prior art, this invention replaces the threads of the first adjusting screw 21 and the second adjusting screw 23 with more precise threads. In the prior art, the pitch of the first adjusting screw 21 and the second adjusting screw 23 is 0.5mm; in this invention, the pitch of the first adjusting screw 21 and the second adjusting screw 23 is 0.35mm. The more precise adjusting threads and the spring-loaded mechanism, along with the addition of ceramic beads between the two adjusting plates for adjustment, further enhance the stability and reliability of the entire structure. The adjusting plate 1, the support plate 2, the first adjusting screw 21, and the second adjusting screw 23 are all made of titanium alloy, significantly reducing the impact of environmental factors on the materials.

[0018] Therefore, this utility model solution replaces the disc spring with a tension spring and uses it in conjunction with the first adjusting screw 21 and the second adjusting screw 23, which have precision threads, for adjustment. Furthermore, the first adjusting screw 21 and the second adjusting screw 23 are changed from flat-headed screws to round-headed screws to solve the problems of adjustment jamming and large errors. This adjustment mechanism uses a large number of titanium alloy components, which greatly reduces the impact of environmental factors on materials. The steel ball limit support used in the traditional adjustment mechanism is replaced with ceramic ball limit support, thereby improving the stability of the entire adjustment mechanism.

[0019] Figure 3 This is a three-dimensional structural diagram of the adjustment mechanism. The diagram shows an adjustment plate 1, a support plate 2, and a mounting base plate 3. An optical lens 11 is mounted on the adjustment plate 1. The adjustment plate 1 and the support plate 2 are spaced apart in the X direction, and the support plate 2 and the mounting base plate 3 are arranged vertically in the Z direction. The mounting base plate 3 is used to mount the support plate 2 and the adjustment plate 1. The mounting base plate 3 also facilitates the assembly of the adjustment mechanism with other products. The bottom of the mounting base plate 3 has pin positioning holes, which reduces the error generated during the installation of the adjustment mechanism. A first adjusting screw 21 and a second adjusting screw 23 are provided through the support plate 2. The round ends of the first adjusting screw 21 and the second adjusting screw 23 abut against the adjusting plate 1. A first fastening nut 22 and a second fastening nut 24 are respectively threaded onto the first adjusting screw 21 and the second adjusting screw 23. The first fastening nut 22 is the fastening component of the first adjusting screw 21, ensuring that the adjustment mechanism will not loosen after adjustment. The fastening stop screw 29 is an important component for fastening the first fastening nut 22 and the second fastening nut 24. After assembling the optical lens 11 with the adjusting plate 1, the first adjusting screw 21 and the second adjusting screw 23 are used for adjustment. After adjustment, the first fastening nut 22 and the second fastening nut 24 are used for tightening. The fastening stop screw 29 ensures the stability of optical adjustment. The fastening stop screw 29 is screwed into the side of the first fastening nut 22 and the second fastening nut 24. The fastening stop screw 29 prevents the corresponding fastening nut from rotating by laterally locking it. A first tension spring 5 and a second tension spring 6 are also provided between the adjusting plate 1 and the support plate 2. The first tension spring 5 and the second tension spring 6 are used to provide the adjusting plate 1 with an elastic restoring force opposite to the pushing force of the first adjusting screw 21 and the second adjusting screw 23. The wire diameter of the first tension spring 5 and the second tension spring 6 can be selected. diameter Length 1mm 3mm 12mm tension spring.

[0020] Figure 4 for Figure 3 Schematic diagram of the cross-section of section AA; that is, the cross-section at the first tension spring 5. Figure 5 for Figure 4Another angle view shows the first tension spring 5 housed within the first tension spring cavity 7, with its two ends respectively connected to the adjusting plate 1 and the support plate 2 via a first tension spring fixing pin 51 and a second tension spring fixing pin 52. The first tension spring cavity 7 includes a cavity 210 located within the support plate 2 and a cavity 13 located within the adjusting plate 1. The cavity 210 is provided with a first slot 2101 for engaging the first tension spring fixing pin 51, and the cavity 13 is provided with a second slot 131 for engaging the second tension spring fixing pin 52. The end of the first adjusting screw 21 is a first arc-shaped end 211, which forms a surface contact with the first screw groove 12 of the adjusting plate 1.

[0021] Figure 6 for Figure 3 A cross-sectional view of section BB shows the following: The adjusting plate 1 has a first magnetic bead groove 14, and the support plate 2 has a second magnetic bead groove 213. The first magnetic bead groove 14 and the second magnetic bead groove 213 are positioned opposite each other. The support ball 4 is positioned between the first magnetic bead groove 14 and the second magnetic bead groove 213. The support ball 4 is a ceramic bead made of ceramic material. The mounting base plate 3 and the support ball 4 positioned between the adjusting plate 1 and the support plate 2 are arranged in a triangle with the first tension spring 5, the second tension spring 6, and the support ball 4. The support ball 4 is a ceramic bead with a diameter of 4mm.

[0022] Figure 7 for Figure 3 A cross-sectional view of the middle C-section shows that the second tension spring 6 is housed within the second tension spring cavity 8, and its two ends are respectively engaged with the adjusting plate 1 and the support plate 2 via the third tension spring fixing pin 61 and the fourth tension spring fixing pin 62. The end of the second adjusting screw 23 is a second arc-shaped end 231, which forms a surface contact with the second screw groove 16 on the adjusting plate 1. The second tension spring cavity 8 includes a third cavity 212 located within the support plate 2 and a fourth cavity 15 located within the adjusting plate 1; the third cavity 212 is provided with a third groove 2121 for engaging the third tension spring fixing pin 61; the fourth cavity 15 is provided with a fourth groove 151 for engaging the fourth tension spring fixing pin 62.

[0023] When using, such as Figure 8This diagram illustrates the application scenario of the adjustment mechanism. Three laser beams of different wavelengths—a (first laser), b (second laser), and c (third laser)—emitted by a laser are reflected by optical lenses 11 on three adjustment mechanisms of this invention. By adjusting the first adjusting screw 21 and the second adjusting screw 23 on each of the adjustment mechanisms d, e, and f, the corresponding optical lenses 11 are displaced and their angles adjusted, ultimately converging the three beams into a lens mechanism g to generate a combined beam h. In the diagram, the three adjustment mechanisms d, e, and f, using the structure of this invention, function as independent optical path adjustment units, precisely mounted on an optical platform via their respective mounting bases 3, forming a combined optical path. Optical lenses 11 are mounted on the adjustment plates 1 of adjustment mechanisms d, e, and f. The optical lens 11 on adjustment mechanism d is a reflector, while the optical lenses 11 on adjustment mechanisms e and f are semi-transparent and semi-reflective mirrors. In the initial state, under the balance of the restoring force of the first tension spring 5 and the second tension spring 6 and the pushing force of the first adjusting screw 21 and the second adjusting screw 23, each adjusting plate 1 maintains a certain relative position with the supporting plate 2 through the fulcrum formed by the supporting ball 4, thus providing an initial reflection reference surface for the first laser a, the second laser b, and the third laser c. The lasers are turned on, and the first laser a, the second laser b, and the third laser c are incident on the optical lenses 11 of the corresponding adjusting mechanisms d, e, and f, respectively. The convergence of the three reflected beams at the lens mechanism g is observed. If a beam of light, such as the first laser a, deviates from the predetermined optical path, the operator needs to fine-tune the first adjusting screw 21 and / or the second adjusting screw 23 on the corresponding adjusting mechanism d. Taking the screw 21 as an example, the first arc end 211 of the screw pushes the first screw groove 12 on the adjusting plate 1, generating a force F; F forces the adjusting plate 1 to undergo a slight pitch deflection around the instantaneous rotation center formed by the supporting ball 4. This deflection process requires overcoming the forces opposite to the direction F generated by the first tension spring 5 and the second tension spring 6. This ensures a linear relationship between the displacement of the adjusting plate 1 and the screw insertion amount, thereby achieving smooth, high-precision angle fine-tuning. By finely and alternately adjusting the advance and retreat of the two screws, the spatial attitude of the optical lens 11 in two degrees of freedom can be independently controlled, ultimately ensuring that all three reflected beams are accurately and collinearly incident on the lens mechanism g. Once all beams converge at the lens mechanism g after adjustment, generating a high-quality combined beam h, the current state must be locked immediately. First, the first locking nut 22 and the second locking nut 24 on each adjusting mechanism are tightened sequentially, making them press tightly against the surface of the support plate 2, using friction to lock the first adjusting screw 21 and the second adjusting screw 23 in their current positions. Then, the locking screw 29 on each adjusting mechanism is tightened, so that its end firmly abuts against the side edge of the first locking nut 22 and the second locking nut 24.This locking nut 29 constitutes a key secondary mechanical anti-loosening structure, which can effectively resist the vibration that may be generated during equipment operation, prevent the locking nut from loosening, and thus maintain the accurate angle of the optical lens 11 for a long time.

[0024] This invention provides an adjustment mechanism for a beam combining device, employing a structure in which a first tension spring 5, a second tension spring 6, and a first adjustment screw 21 and a second adjustment screw 23 with a pitch of 0.35mm are used, replacing the traditional structure of a disc spring washer 27 and a first fine-tuning bolt 25 and a second fine-tuning bolt 26. The triangular force balance structure formed by the first tension spring 5, the second tension spring 6, and the support ball 4 solves the problems of jamming during adjustment and the easy failure of the disc spring's elasticity. The traditional steel ball support point is replaced with a ceramic support ball 4. These improvements enable the mechanism to achieve stable and highly repeatable fine-tuning of the optical lens 11 angle, significantly improving the adjustment efficiency and final beam combining quality.

Claims

1. An adjustment mechanism for a beam combining device, comprising an adjustment plate (1), a support plate (2), a mounting base plate (3) for mounting the support plate (2) and the adjustment plate (1), and a support ball (4) disposed between the adjustment plate (1) and the support plate (2); a first adjustment screw (21) and a second adjustment screw (23) are provided through the support plate (2), the ends of the first adjustment screw (21) and the second adjustment screw (23) abutting against the adjustment plate (1); a first fastening nut (22) and a second fastening nut (24) are respectively threaded onto the first adjustment screw (21) and the second adjustment screw (23); characterized in that: Between the adjusting plate (1) and the support plate (2), there is a first tension spring (5) and a second tension spring (6) for providing an elastic restoring force to the adjusting plate (1) in the opposite direction to the pushing force of the first adjusting screw (21) and the second adjusting screw (23); the first tension spring (5), the second tension spring (6) and the support ball (4) are arranged in a triangle; the first tension spring (5) is housed in the first tension spring cavity (7) and its two ends are respectively connected to the adjusting plate (1) and the support plate (2) by the first tension spring fixing pin (51) and the second tension spring fixing pin (52); the second tension spring (6) is housed in the second tension spring cavity (8) and its two ends are respectively connected to the adjusting plate (1) and the support plate (2) by the third tension spring fixing pin (61) and the fourth tension spring fixing pin (62).

2. The adjustment mechanism for the beam combining device according to claim 1, characterized in that: The ends of the first adjusting screw (21) and the second adjusting screw (23) are the first arc end (211) and the second arc end (231), and the first arc end (211) and the second arc end (231) form a surface contact with the adjusting plate (1).

3. The adjustment mechanism for the beam combining device according to claim 1, characterized in that: The supporting sphere (4) is a ceramic bead made of ceramic material.

4. The adjustment mechanism for the beam combining device according to claim 1, characterized in that: The first tension spring cavity (7) includes a cavity one (210) located in the support plate (2) and a cavity two (13) located in the adjustment plate (1); the cavity one (210) is provided with a first slot (2101) for engaging the first tension spring fixing pin (51); the cavity two (13) is provided with a second slot (131) for engaging the second tension spring fixing pin (52).

5. The adjustment mechanism for the beam combining device according to claim 1, characterized in that: The second tension spring cavity (8) includes a third cavity (212) located in the support plate (2) and a fourth cavity (15) located in the adjustment plate (1); the third cavity (212) is provided with a third slot (2121) for engaging the third tension spring fixing pin (61); the fourth cavity (15) is provided with a fourth slot (151) for engaging the fourth tension spring fixing pin (62).

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