A cavity adjustment device for assembling a laser gyroscope

Abstract

The present invention provides a cavity adjustment device for assembling a laser gyroscope, comprising: a workbench; a supporting platform, the supporting platform being arranged on the workbench; a guide structure, the guide structure comprising a mounting plate and a guide rod, the guide rod being horizontally mounted on the supporting platform via the mounting plate. When there is a horizontal offset, a vertical offset, or an angular offset between the spherical mirror and the optical adhesive surface, the hole wall of the positioning hole provided by the present invention will act in correspondence with different surfaces of the tapered end of the guide rod. Under the action of multiple parts of the tapered surface, the horizontal plate is adaptively corrected for horizontal displacement, the longitudinal plate is corrected for vertical direction, the rotating frame is corrected for horizontal rotation, and the rotating frame is corrected for vertical rotation. When the positioning hole is sleeved on the non-tapered end of the guide rod, the spherical mirror is aligned with the optical adhesive surface of the laser, completing coarse adjustment, thereby adaptively achieving adjustment of the horizontal offset, vertical offset, or angular offset.

Description

Technical Field

[0001] The invention relates to the field of laser gyroscope cavity adjustment, and in particular to a cavity adjustment device used for assembling a laser gyroscope. Background Art

[0002] Laser gyros are ideal components for high-precision strapdown inertial navigation systems. Ring lasers are the fundamental components of laser gyros. During the production process, due to factors such as materials and processing, each laser's resonant cavity optical path and reflectors vary slightly. Therefore, these errors must be compensated for by adjusting the position of the reflectors on the laser to meet the laser's operational requirements. This process of adjusting and assembling the reflectors on the laser is called cavity tuning. A laser gyro includes multiple reflectors, including both plane and spherical mirrors, and cavity tuning is primarily used to assemble the spherical mirrors.

[0003] In the prior art, the cavity adjustment equipment includes a coarse adjustment platform, a fine adjustment platform, a clamping structure, a light source system and a detector, etc. The clamping structure is used to clamp the assembled reflector, and the coarse adjustment platform is used to perform coarse adjustment on the assembled reflector so that it is aligned with the optical glue surface of the laser installation position, and then further fine-tuned through the fine adjustment platform. During the adjustment process, the light source system cooperates with the detector to determine whether the optical glue surface of the reflector and the laser meets the standard alignment. Among them, the coarse adjustment platform and the fine adjustment platform are both multi-dimensional adjustment platforms, such as a five-dimensional adjustment platform. For the use of a multi-dimensional coarse adjustment platform in the coarse adjustment process, a driving device is required for each dimension, and multi-dimensional drive adjustment is required. The adjustment speed is slow and the cost is high. How to achieve adaptive coarse adjustment more quickly still has room for improvement.

[0004] Therefore, it is necessary to provide a cavity adjustment device for assembling a laser gyroscope to solve the above technical problems. Summary of the Invention

[0005] The present invention provides a cavity adjustment device for assembling a laser gyroscope, which solves the problem of how to achieve adaptive coarse adjustment more quickly during the coarse adjustment process, which requires multi-dimensional drive adjustment and slow adjustment speed.

[0006] In order to solve the above technical problems, the present invention provides a cavity adjustment device for assembling a laser gyroscope, comprising: a workbench;

[0007] A placing platform, the placing platform is arranged on the workbench;

[0008] A guide structure, comprising a mounting plate and a guide rod, wherein the guide rod is horizontally mounted on the support platform via the mounting plate, and an end portion of the guide rod is configured to be tapered;

[0009] A macro-adjustment platform, wherein the macro-adjustment platform is mounted on the workbench through a support plate structure, and comprises a moving device, a horizontal plate, a longitudinal plate, a rotating frame, and a turret. The horizontal plate is slidably mounted on the output end of the moving device, the longitudinal plate is vertically slidably connected to the horizontal plate, the turret is horizontally rotatably mounted on the longitudinal plate, and the turret is vertically rotatably mounted in the turret. The moving device is used to drive the horizontal plate to move toward the placing platform.

[0010] A fine-tuning platform is mounted on the rotating frame, and a positioning ear is mounted on the fine-tuning platform. The positioning ear is provided with a positioning hole, and the diameter of the positioning hole is the same as the diameter of the guide rod; when adjusting the cavity, the positioning hole is aligned with the guide rod;

[0011] A clamping structure is installed on the fine-tuning platform.

[0012] Preferably, the support plate structure includes a rotating tube, an assembly frame and a rotating part. The rotating tube is rotatably installed on the support plate of the workbench. The rotating tube is concentrically arranged with the supporting platform. The assembly frame is installed on the rotating tube and is located between the supporting platform and the support plate. The moving device is installed on the assembly frame. There are two guide structures, and the two guide structures are arranged at ninety degrees on the supporting platform.

[0013] Preferably, the moving device includes a rotating member, a screw rod, a nut and a mounting bracket, the mounting bracket is installed at the bottom of the assembly frame, the screw rod is rotatably installed on the mounting bracket, the nut is threadedly connected to the screw rod, and the nut is slidably installed on the mounting bracket, the rotating member is used to drive the screw rod to rotate, and the horizontal plate is slidably installed on the top of the nut.

[0014] Preferably, the moving device further comprises a sliding rod, the sliding rod is slidably mounted in the mounting frame, and the nut is sleeved on the sliding rod.

[0015] Preferably, the rotating frame includes a bracket and a rotating motor, the bracket is rotatably mounted on the longitudinal plate, the rotating motor is mounted on the side wall of the bracket, and the rotating frame is mounted on the output shaft of the rotating motor. The cavity adjustment device for assembling the laser gyroscope also includes a positioning device, and the positioning device includes a lifting cylinder, a positioning plate and a positioning shaft. The lifting cylinder is installed on the mounting frame, and the output shaft of the lifting cylinder passes through the mounting frame and the assembly frame in sequence and then connects to the positioning plate. The positioning shaft is installed at the bottom of the positioning plate, and the positioning plate is suspended above the clamping structure.

[0016] Preferably, the cavity adjustment device for assembling a laser gyroscope also includes a clamping device, which includes a threaded shaft, a threaded sleeve, a driving member, a plurality of L-shaped arms and a plurality of pressure blocks. The threaded shaft is rotatably mounted inside the supporting platform, the threaded sleeve is threadedly connected to the threaded shaft, and a plurality of L-shaped arms are arranged around the threaded shaft, and one end of the L-shaped arm is connected to the threaded shaft, and the other end passes through the supporting platform, and each of the pressure blocks is rotatably mounted on the top end of a corresponding L-shaped arm.

[0017] Preferably, the cavity adjustment device for assembling a laser gyroscope further includes a driving device and a connecting plate, the driving device including a fixing frame, a driving motor, a main bevel gear, a driving tube and a square tube, the driving motor is mounted on the bottom of the workbench through the fixing frame, the driving tube is keyed to the driving shaft of the driving motor, the main bevel gear is sleeved and fixedly mounted on the driving tube, the square tube is mounted on the top end of the driving tube, one end of the connecting plate is connected to the driving tube through a rotating member, and the other end is connected to the output end of the lifting cylinder;

[0018] The rotating member is a square sleeve, which is mounted on the bottom end of the rotating tube. The rotating tube is sleeved on the driving tube, and the inner cavity of the rotating member is the same size as that of the square tube.

[0019] The rotating member is a slave bevel gear, which is mounted on the screw rod and meshes with the master bevel gear.

[0020] Preferably, the driving member is a square shaft, which is installed at the bottom end of the threaded shaft. The driving member and the inner cavity of the square tube are the same size. When the main bevel gear is engaged with the rotating member, the driving tube is sleeved on the driving member, and the square tube is located above the driving member.

[0021] Preferably, the cavity adjustment device for assembling a laser gyroscope also includes a limiting structure, which includes a driving plate and a limiting block. The driving plate is connected to the connecting plate, and the limiting block is installed on the driving plate. A positioning port is provided on the fixing frame, and the limiting block is connected to the positioning port with a sliding key.

[0022] Preferably, a slide rail is provided on the workbench, and one end of the assembly frame away from the rotating tube is slidably connected to the slide rail.

[0023] Compared with related technologies, the cavity adjustment device for assembling a laser gyroscope provided by the present invention has the following beneficial effects:

[0024] The present invention provides a cavity adjustment device for assembling a laser gyroscope. During cavity adjustment, the laser is mounted on a supporting platform, the optical adhesive surface of the laser faces the clamping structure, and the spherical mirror to be installed is mounted in the clamping structure, wherein the positioning hole is aligned with the tapered end of the guide rod. The moving device works, so that the macro-adjustment platform drives the fine-adjustment platform to move toward the optical adhesive surface of the laser. During the movement, the tapered end of the guide rod is inserted into the positioning hole. When there is a horizontal offset, a vertical offset or an angular offset between the spherical mirror and the optical adhesive surface, the hole wall of the positioning hole will correspond to different surfaces of the tapered end of the guide rod. Under the action of multiple parts of the tapered surface, the horizontal plate is adaptively corrected for horizontal displacement, the longitudinal plate is adaptively corrected in the vertical direction, the rotating frame is adaptively corrected for horizontal rotation, and the rotating frame is adaptively corrected for vertical rotation. When the positioning hole is sleeved on the non-tapered end of the guide rod, the spherical mirror is aligned with the optical adhesive surface of the laser, and coarse adjustment is completed, thereby adaptively realizing adjustment of horizontal offset, vertical offset or angular offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a cavity adjustment device for assembling a laser gyroscope provided by the present invention;

[0026] Figure 2 for Figure 1 The structure diagram of the cavity adjustment device for assembling a laser gyroscope after removing part of the workbench is shown;

[0027] Figure 3 Schematic diagram of the macro-adjustment platform, fine-adjustment platform and clamping structure provided by the present invention;

[0028] Figure 4 A partial cross-sectional view of a cavity adjustment device for assembling a laser gyroscope provided by the present invention;

[0029] Figure 5 A partial schematic diagram of the driving device provided by the present invention;

[0030] Figure 6 A schematic diagram of the present invention showing a rotating motor driving the bracket to rotate so that the clamping structure faces upward;

[0031] Figure 7 A schematic diagram of a rectangular tube provided by the present invention being sleeved on a driving member;

[0032] Figure 8 This is a schematic diagram of the assembly of the rectangular tube and the rotating part provided by the present invention.

[0033] Numbers in the figure:

[0034] 1. Workbench; 11. Assembly port; 12. Support plate; 13. Slide rail;

[0035] 2. Support plate structure; 21. Rotating tube; 22. Assembly frame; 23. Rotating part;

[0036] 3. Macro adjustment platform; 31. Moving device; 32. Horizontal plate; 33. Longitudinal plate; 34. Rotating frame; 35. Rotating frame; 341. Bracket; 342. Rotating motor;

[0037] 311. Rotating member; 312. Screw rod; 313. Nut; 314. Sliding rod; 315. Mounting bracket;

[0038] 4. Fine-tuning platform; 41. Positioning ear; 411. Positioning hole;

[0039] 5. Clamping structure; 51. Assembly plate; 52. Micro displacement sensor; 53. Clamping head;

[0040] 6. Guide structure; 61. Mounting plate; 62. Guide rod;

[0041] 7. Driving device; 71. Fixing frame; 72. Driving motor; 73. Main bevel gear; 74. Driving tube; 75. Square tube; 711. Positioning port; 721. Driving shaft;

[0042] 8. Clamping device; 81. Threaded shaft; 82. Threaded sleeve; 83. Driving member; 84. L-shaped arm; 85. Pressing block;

[0043] 9. Positioning device; 91. Lifting cylinder; 92. Positioning plate; 93. Positioning shaft;

[0044] 10. Placing platform; 101. Positioning groove; 20. Connecting plate;

[0045] 40. Limiting structure; 401. Driving plate; 402. Limiting block. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] The invention provides a cavity adjustment device for assembling a laser gyroscope.

[0048] Please refer to Figures 1 to 3 ,In one embodiment of the present invention, the cavity tuning device for assembling a laser gyroscope comprises: a workbench 1;

[0049] A placing platform 10, wherein the placing platform 10 is arranged on the workbench 1;

[0050] The guide structure 6 includes a mounting plate 61 and a guide rod 62. The guide rod 62 is horizontally mounted on the support platform 10 through the mounting plate 61. The end of the guide rod 62 is configured to be tapered.

[0051] The macro-adjustment platform 3 is installed on the workbench 1 through the support plate structure 2. The macro-adjustment platform 3 includes a moving device 31, a horizontal plate 32, a longitudinal plate 33, a rotating frame 34 and a rotating frame 35. The horizontal plate 32 is slidably installed at the output end of the moving device 31, the longitudinal plate 33 is vertically slidably connected to the horizontal plate 32, the rotating frame 34 is horizontally rotatably installed on the longitudinal plate 33, and the rotating frame 35 is vertically rotatably installed in the rotating frame 34. The moving device 31 is used to drive the horizontal plate 32 to move toward the supporting platform 10;

[0052] A fine-tuning platform 4 is mounted on the rotating frame 35. A positioning ear 41 is mounted on the fine-tuning platform 4. A positioning hole 411 is formed on the positioning ear 41. The diameter of the positioning hole 411 is the same as the diameter of the guide rod 62. When adjusting the cavity, the positioning hole 411 is aligned with the guide rod 62.

[0053] The clamping structure 5 is installed on the fine-tuning platform 4 .

[0054] In this embodiment, the sliding direction of the horizontal plate 32 is perpendicular to the direction in which the moving device 31 drives the horizontal plate 32 to move, and the axis of rotation of the rotating frame 34 is perpendicular to the axis of rotation of the rotating frame 35;

[0055] When adjusting the cavity, the laser is mounted on the support table 10, with the optical adhesive surface of the laser facing the clamping structure 5, and the spherical mirror to be installed is mounted in the clamping structure 5, wherein the positioning hole 411 is aligned with the tapered end of the guide rod 62, and the moving device 31 is operated to make the macro adjustment platform 3 drive the fine adjustment platform 4 to move toward the optical adhesive surface of the laser. During the movement, the tapered end of the guide rod 62 is inserted into the positioning hole 411. When there is a horizontal offset, vertical offset or angular offset between the spherical mirror and the optical adhesive surface, the hole of the positioning hole 411 is aligned with the tapered end of the guide rod 62. The wall will correspond to different surfaces of the tapered end of the guide rod 62. Under the action of multiple parts of the tapered surface, the horizontal plate 32 is adaptively corrected for horizontal displacement, the longitudinal plate 33 is corrected in the vertical direction, the rotating frame 34 is corrected for horizontal rotation, and the rotating frame 35 is corrected for vertical rotation. When the positioning hole 411 is mounted on the non-tapered end of the guide rod 62, the spherical mirror is aligned with the optical glue surface of the laser to complete the coarse adjustment, thereby adaptively realizing the adjustment of horizontal offset, vertical offset or angular offset.

[0056] After the coarse adjustment is completed, the spherical mirror is slightly displaced by the fine adjustment platform 4 to complete the installation of the spherical mirror and the optical adhesive surface of the laser.

[0057] In this embodiment, the clamping structure 5 includes an assembly plate 51, a clamping head 53 and four micro-displacement sensors 52. The clamping head 53 is installed at the center of the assembly plate 51, the four micro-displacement sensors 52 are installed at the four corners of the assembly plate 51, and the assembly plate 51 is installed at the output end of the fine-tuning platform 4.

[0058] The micro-displacement sensor 52 is used to detect the position and posture between the lens reference surface and the cavity polished surface. The movement of the fine-tuning platform 4 is controlled according to the distance (z) between the lens and the cavity polished surface to meet the distance requirement between the lens and the cavity. LVDT is preferably used as the micro-displacement sensor 52.

[0059] The clamping head 53 clamper adopts a frictionless, gapless, two-stage lever magnification flexible hinge mechanism to meet the requirements of high magnification. Considering the insulation of the spherical mirror crown, the end of the operator (claw) is made of reinforced nylon. At the same time, the claw is designed in the form of a horizontally adjustable V-groove to ensure that the operator clamps the spherical mirror. The operator is driven by a piezoelectric ceramic driver to drive the flexible hinge mechanism to drive the claw to contract and clamp the spherical mirror, which is easy to control. A clamping cavity is provided on the clamping head 53, and four claws are provided, which are arranged around the placement cavity. After the spherical mirror is placed in the clamping cavity, the claws clamp the spherical mirror.

[0060] In this embodiment, the fine-tuning platform 4 utilizes a five-degree-of-freedom (DOF) micro-positioning platform (x, y, z, θx, θy) with a series-parallel hybrid structure driven by piezoelectric ceramics, consisting of two-dimensional and three-dimensional micro-positioning platforms. The two-dimensional micro-positioning platform is a series mechanism using a right-angled flat flexible hinge as the kinematic pair. It is driven by two piezoelectric ceramics. When a certain voltage is applied to the piezoelectric ceramics, the piezoelectric ceramics extend and drive the flexible hinges to deform, thereby achieving two-dimensional (x, y) precision motion of the micro-motion mechanism. The three-dimensional micro-positioning platform is a parallel mechanism using an annular flat hinge as the kinematic pair. It is driven simultaneously by three piezoelectric ceramics, and the deformation of the annular flat hinges enables three-dimensional (z, θx, θy) micro-motion operation.

[0061] The cavity tuning device of the laser gyro assembly also includes a microscopic vision system, a laser loss detection system (not shown) installed on the workbench 1 and located on one side of the supporting platform 10. The detection structure determines whether the spherical mirror is qualified for cavity tuning.

[0062] See also Figure 2 and Figure 4As an optional method of this embodiment, the support plate structure 2 includes a rotating tube 21, an assembly frame 22 and a rotating member 23. The rotating tube 21 is rotatably installed on the support plate 12 of the workbench 1. The rotating tube 21 is concentrically arranged with the supporting platform 10. The assembly frame 22 is installed on the rotating tube 21 and is located between the supporting platform 10 and the support plate 12. The moving device 31 is installed on the assembly frame 22. There are two guide structures 6, and the two guide structures 6 are arranged at ninety degrees on the supporting platform 10.

[0063] Among them, laser gyroscopes have different resonant cavity structure designs, including triangles, quadrilaterals, etc. The triangle is usually composed of two plane mirrors and one spherical mirror, and the quadrilateral is usually composed of two plane mirrors and two spherical mirrors. The four reflectors are located at the four corners of the quadrilateral. Since the quadrilateral laser gyroscope consists of two spherical mirrors, it is necessary to adjust the cavity installation of the two spherical mirrors, and the two spherical mirrors are usually located at the two corners on the same side of the laser.

[0064] By setting the support plate structure 2 to be rotatable, after a spherical mirror is assembled for cavity adjustment, the rotating part 23 rotates ninety degrees, driving the assembly frame 22 to move the macro-adjustment platform 3, the fine-adjustment platform 4, the clamping structure 5 and the spherical mirror to be assembled to another installation position of the laser, and the cavity adjustment is performed in the same way.

[0065] Among them, two mounting plates 61 and guide rods 62 are set on the supporting platform 10 corresponding to each spherical mirror, and the two guide rods 62 are located on both sides of the laser optical glue surface; the corresponding number of positioning ears 41 is set to two, which are located on both sides of the fine-tuning platform 4.

[0066] See also Figure 2 and Figure 3 As an optional method of this embodiment, the moving device 31 includes a rotating member 311, a screw rod 312, a nut 313 and a mounting bracket 315. The mounting bracket 315 is installed at the bottom of the assembly frame 22. The screw rod 312 is rotatably mounted on the mounting bracket 315. The nut 313 is threadedly connected to the screw rod 312, and the nut 313 is slidably mounted on the mounting bracket 315. The rotating member 311 is used to drive the screw rod 312 to rotate, and the horizontal plate 32 is slidably mounted on the top of the nut 313.

[0067] When it is necessary to adjust the spherical mirror to move toward the optical glue surface of the laser, the rotating part 311 drives the screw rod 312 to rotate, and the nut 313 moves along the screw rod 312. The nut 313 drives the macro-adjustment platform 3 to move. The macro-adjustment platform 3 drives the spherical mirror to move toward the optical glue surface of the laser through the fine-tuning platform 4 and the clamping structure 5, thereby realizing the function of horizontal movement.

[0068] The screw rod 312 adopts a ball screw rod, and the screw rod structure can more accurately control the moving distance.

[0069] As another optional method of this embodiment, the moving device 31 can also adopt an electric push cylinder, etc.

[0070] See also Figure 3 As an optional method of this embodiment, the moving device 31 also includes a sliding rod 314, which is slidably installed in the mounting frame 315, and the nut 313 is sleeved on the sliding rod 314.

[0071] By providing the slide rod 314 to support and limit the nut 313, the nut 313 can move more smoothly.

[0072] In this embodiment, there are two sliding rods 314 , one located on either side of the screw rod 312 .

[0073] As another optional method of this embodiment, slideways can also be provided on the mounting frame 315 and on both sides of the screw rod 312 , and both sides of the nut 313 are slidably connected to the slideways.

[0074] See also Figure 3 and Figure 4 As a preferred embodiment of this embodiment, the rotating frame 34 includes a bracket 341 and a rotating motor 342. The bracket 341 is rotatably mounted on the longitudinal plate 33. The rotating motor 342 is mounted on the side wall of the bracket 341. The rotating frame 35 is mounted on the output shaft of the rotating motor 342. The cavity adjustment device for assembling a laser gyroscope also includes a positioning device 9. The positioning device 9 includes a lifting cylinder 91, a positioning plate 92 and a positioning shaft 93. The lifting cylinder 91 is mounted on the mounting frame 315. The output shaft of the lifting cylinder 91 sequentially passes through the mounting frame 315 and the assembly frame 22 and then connects to the positioning plate 92. The positioning shaft 93 is mounted on the bottom of the positioning plate 92. The positioning plate 92 is suspended above the clamping structure 5.

[0075] By setting up a rotating motor 342, when the clamping structure 5 is installed into the spherical mirror, the rotating motor 342 drives the bracket 341 to rotate ninety degrees, so that the clamping cavity of the clamping structure 5 faces upward, and the spherical mirror is placed in the clamping cavity. At this time, the spherical mirror can better fit in the clamping cavity and be placed stably by gravity, and at this time, the lifting cylinder 91 drives the positioning plate 92 downward, and the positioning shaft 93 at the bottom end of the positioning plate 92 can press down the side of the spherical mirror so that it can fit more closely in the clamping cavity to avoid tilting and incomplete fitting. After fitting, the spherical mirror is clamped by the clamping claws.

[0076] Among them, it is preferred to set multiple positioning axes 93. In this embodiment, there are four positioning axes 93, which can act on four positions on the side of the spherical mirror.

[0077] The bottom end of the positioning shaft 93 is provided with a soft sleeve, which may be made of nylon or rubber.

[0078] In the process of the positioning hole 411 being sleeved onto the conical head of the guide rod 62 , the rotating motor 342 does not work, and does not affect the adaptive rotation of the bracket 341 .

[0079] See also Figure 2 and Figure 4 As an optional method of this embodiment, the cavity adjustment device for assembling a laser gyroscope further includes a clamping device 8, which includes a threaded shaft 81, a threaded sleeve 82, a driving member 83, a plurality of L-shaped arms 84 and a plurality of pressing blocks 85. The threaded shaft 81 is rotatably mounted inside the supporting platform 10, the threaded sleeve 82 is threadedly connected to the threaded shaft 81, and a plurality of L-shaped arms 84 are arranged around the threaded shaft 81, and one end of the L-shaped arm 84 is connected to the threaded shaft 81, and the other end passes through the supporting platform 10, and each of the pressing blocks 85 is rotatably mounted on the top end of a corresponding L-shaped arm 84.

[0080] By providing the pressing device 8, after the laser is placed on the placing table 10, the pressing device 8 can limit the position of the laser to prevent the laser from moving and affecting the assembly.

[0081] Among them, after the laser is placed on the supporting platform 10, the pressure block 85 is rotated to overlap with the laser, and then the driving member 83 drives the threaded shaft 81 to rotate, driving the threaded sleeve 82 to move downward, and the L-shaped arm 84 simultaneously limits the axial position of the threaded sleeve 82. The threaded sleeve 82 drives the pressure block 85 to move downward through the L-shaped arm 84 to press the laser to achieve limitation.

[0082] Among them, a positioning groove 101 is provided on the supporting platform 10. The shape and size of the positioning groove 101 is the same as that of the laser, which limits the laser. The four L-shaped arms 84 are aligned and fit with the four sides of the laser to limit the laser in the horizontal direction, and the pressure block 85 limits the laser in the vertical direction.

[0083] The lifting cylinder 91 is an electric push cylinder, a pneumatic cylinder or a hydraulic cylinder.

[0084] See also Figure 4As an optional manner of this embodiment, the cavity adjustment device for assembling a laser gyroscope further includes a driving device 7 and a connecting plate 20. The driving device 7 includes a fixing frame 71, a driving motor 72, a main bevel gear 73, a driving tube 74 and a square tube 75. The driving motor 72 is mounted on the bottom of the workbench 1 through the fixing frame 71. The driving tube 74 is connected to the driving shaft 721 of the driving motor 72 by a sliding key. The main bevel gear 73 is sleeved and fixedly mounted on the driving tube 74. The square tube 75 is mounted on the top of the driving tube 74. One end of the connecting plate 20 is connected to the driving tube 74 through a rotating member 23, and the other end is connected to the output end of the lifting cylinder 91.

[0085] The rotating member 23 is a square sleeve, which is mounted on the bottom end of the rotating tube 21. The rotating tube 21 is sleeved on the driving tube 74. The inner cavity of the rotating member 23 is the same size as the square tube 75.

[0086] The rotating member 311 is a slave bevel gear. The rotating member 311 is mounted on the screw rod 312 and is engaged with the master bevel gear 73 .

[0087] When the moving device 31 needs to be moved, the rotating member 311 (slave bevel gear) engages with the main bevel gear 73, and the rotating member 23 (square sleeve) is sleeved on the driving tube 74. At this time, the driving motor 72 works and drives the driving tube 74 to rotate through the driving shaft 721. The driving tube 74 drives the rotating member 311 (slave bevel gear) to rotate through the main bevel gear 73, thereby driving the screw rod 312 to rotate, so that the moving device 31 drives the spherical mirror to move; and at this time, the positioning plate 92 is suspended above the clamping structure 5.

[0088] See also Figure 8 When it is necessary to adjust the cavity and install another spherical mirror of the laser, the spherical mirror is installed into the clamping structure 5, and the lifting cylinder 91 descends to drive the positioning plate 92, so that the positioning shaft 93 presses down the side of the spherical mirror to make it fit into the clamping cavity of the clamping structure 5. At this time, the lifting cylinder 91 drives the driving tube 74 to move downward through the connecting plate 20. At this time, the rotating part 311 (slave bevel gear) is separated from the main bevel gear 73, and the square tube 75 at the top of the driving tube 74 is inserted into the rotating part 23 (square sleeve). At this time, the driving motor 72 is working, and the driving shaft 721 drives the driving tube 74 to rotate. The driving tube 74 drives the rotating tube 21 to rotate ninety degrees through the square tube 75, and the clamping structure 5 and other components are switched to align the clamping structure 5 with another installation position of the laser. During the rotation process, the positioning plate 92 and the positioning shaft 93 can limit the spherical mirror.

[0089] Subsequently, the lifting cylinder 91 lifts the positioning plate 92 again, and the motor 342 is rotated to adjust the spherical mirror to align with the optical adhesive surface of the laser. At this time, the rotating member 311 is again engaged with the main bevel gear 73. Thus, the moving device 31 can drive the spherical mirror to perform rough adjustment.

[0090] Thus, the driving device 7 can sequentially drive the moving device 31 to work and the support plate structure 2 to switch positions, and in the switching between the two functions, the positioning device 9 can act on the spherical mirror to make it fit with the clamping cavity.

[0091] The number of teeth of the main bevel gear 73 and the rotating member 311 (slave bevel gear) is a multiple of four, so that after rotating ninety degrees, the main bevel gear 73 and the rotating member 311 (slave bevel gear) can mesh again.

[0092] In this embodiment, the driving motor 72 is a servo motor or a stepping motor.

[0093] The rotating member 23 is a rotating component such as a bearing, the inner ring of which is mounted on the driving tube 74 , and the connecting plate 20 is connected to the outer ring of the bearing.

[0094] As another optional embodiment of the present invention, the rotating member 311 and the rotatable member 23 each include a frame and a motor, respectively driving the rotating tube 21 and the screw rod 312 .

[0095] Please refer again Figure 4 As an optional method of this embodiment, the driving member 83 is a square shaft, and the driving member 83 is installed at the bottom end of the threaded shaft 81. The inner cavity of the driving member 83 is the same size as that of the square tube 75. When the main bevel gear 73 is engaged with the rotating member 311, the driving tube 74 is sleeved on the driving member 83, and the square tube 75 is located above the driving member 83.

[0096] See also Figure 7 When the laser needs to be limited, the lifting cylinder 91 lowers the positioning plate 92, and the positioning shaft 93 is not in contact with the spherical mirror; the connecting plate 20 drives the driving tube 74 to move downward, so that the square tube 75 is sleeved on the driving member 83 (square shaft). At this time, the rotating member 311 is separated from the main bevel gear 73. At this time, the driving motor 72 drives the driving tube 74 to rotate, and the square tube 75 drives the driving member 83 to rotate, thereby driving the threaded shaft 81 to rotate, thereby adjusting the clamping device 8 to limit the laser.

[0097] Thus, the driving device 7 can sequentially drive the moving device 31 to work and the support plate structure 2 to switch positions and drive the clamping device 8 to limit the laser. In the switching of functions, the positioning device 9 can act on the spherical mirror to make it fit with the clamping cavity.

[0098] The threaded shaft 81 rotates an integer number of times, thereby facilitating the subsequent engagement of the main bevel gear 73 with the rotating member 311 .

[0099] As another optional embodiment of the present invention, the driving member 83 includes a motor and a frame. The motor is installed inside the placing platform 10 through the frame, and the output shaft of the motor is connected to the threaded shaft 81 .

[0100] See also Figure 2 The cavity adjustment device for assembling a laser gyroscope also includes a limiting structure 40, which includes a driving plate 401 and a limiting block 402. The driving plate 401 is connected to the connecting plate 20, and the limiting block 402 is installed on the driving plate 401. A positioning hole 711 is opened on the fixing frame 71, and the limiting block 402 is connected to the positioning hole 711 by a sliding key.

[0101] When the square tube 75 is not assembled with the rotating member 23 (square sleeve), the limiting structure 40 can be provided to limit the assembly frame 22 to prevent the support plate structure 2 from being displaced.

[0102] Please refer to Figures 6 to 8 When the square tube 75 is not assembled with the rotating member 23 (square sleeve), the limit blocks 402 are assembled with the positioning openings 711. When the square tube 75 is assembled with the rotating member 23 (square sleeve), the limit blocks 402 are separated from the positioning openings 711 and do not affect the rotation of the assembly frame 22.

[0103] See also Figure 1 and Figure 2 A slide rail 13 is provided on the workbench 1 , and one end of the assembly frame 22 away from the rotating tube 21 is slidably connected to the slide rail 13 .

[0104] The slide rail 13 is provided to support the assembly frame 22, thereby improving the support stability of the assembly frame 22;

[0105] The support plate 12 is provided with a corresponding slide rail 13 , and both ends of the bottom of the assembly frame 22 are provided with pulleys, which are assembled with the slide rail 13 to form a sliding connection.

[0106] An assembly opening 11 is formed on the workbench 1 , and a slide rail 13 is disposed in the assembly opening 11 .

[0107] The working principle of the cavity adjustment device for assembling a laser gyroscope provided by the present invention is as follows:

[0108] When adjusting the cavity, the laser is mounted on the support table 10, with the optical adhesive surface of the laser facing the clamping structure 5, and the spherical mirror to be installed is mounted in the clamping structure 5, wherein the positioning hole 411 is aligned with the tapered end of the guide rod 62, and the moving device 31 is operated to make the macro adjustment platform 3 drive the fine adjustment platform 4 to move toward the optical adhesive surface of the laser. During the movement, the tapered end of the guide rod 62 is inserted into the positioning hole 411. When there is a horizontal offset, vertical offset or angular offset between the spherical mirror and the optical adhesive surface, the hole of the positioning hole 411 is aligned with the tapered end of the guide rod 62. The wall will correspond to different surfaces of the tapered end of the guide rod 62. Under the action of multiple parts of the tapered surface, the horizontal plate 32 is adaptively corrected for horizontal displacement, the longitudinal plate 33 is corrected in the vertical direction, the rotating frame 34 is corrected for horizontal rotation, and the rotating frame 35 is corrected for vertical rotation. When the positioning hole 411 is mounted on the non-tapered end of the guide rod 62, the spherical mirror is aligned with the optical glue surface of the laser to complete the coarse adjustment, thereby adaptively realizing the adjustment of horizontal offset, vertical offset or angular offset.

[0109] After the coarse adjustment is completed, the spherical mirror is slightly displaced by the fine adjustment platform 4 to complete the installation of the spherical mirror and the optical adhesive surface of the laser.

[0110] Among them, laser gyroscopes have different resonant cavity structure designs, including triangles, quadrilaterals, etc. The triangle is usually composed of two plane mirrors and one spherical mirror, and the quadrilateral is usually composed of two plane mirrors and two spherical mirrors. The four reflectors are located at the four corners of the quadrilateral. Since the quadrilateral laser gyroscope consists of two spherical mirrors, it is necessary to adjust the cavity installation of the two spherical mirrors, and the two spherical mirrors are usually located at the two corners on the same side of the laser.

[0111] By setting the support plate structure 2 to be rotatable, after a spherical mirror is assembled and adjusted for cavity, the rotating member 23 rotates 90 degrees, driving the assembly frame 22 to move the macro-adjustment platform 3, the fine-adjustment platform 4, the clamping structure 5 and the spherical mirror to be assembled to another installation position of the laser, and the cavity adjustment is performed in the same way;

[0112] When the clamping structure 5 is installed into the spherical mirror, the rotating motor 342 drives the bracket 341 to rotate ninety degrees, so that the clamping cavity of the clamping structure 5 faces upward, and the spherical mirror is placed in the clamping cavity. At this time, the spherical mirror can be better fitted and stably placed in the clamping cavity by gravity, and at this time, the lifting cylinder 91 drives the positioning plate 92 downward, and the positioning shaft 93 at the bottom end of the positioning plate 92 can press down the side of the spherical mirror, so that it can fit more closely in the clamping cavity, avoiding the situation of tilting and incomplete fitting. After fitting, the spherical mirror is clamped by the clamping claws;

[0113] When the moving device 31 needs to be moved, the rotating member 311 (slave bevel gear) engages with the main bevel gear 73, and the rotating member 23 (square sleeve) is sleeved on the driving tube 74. At this time, the driving motor 72 works and drives the driving tube 74 to rotate through the driving shaft 721. The driving tube 74 drives the rotating member 311 (slave bevel gear) to rotate through the main bevel gear 73, thereby driving the screw rod 312 to rotate, so that the moving device 31 drives the spherical mirror to move; and at this time, the positioning plate 92 is suspended above the clamping structure 5.

[0114] See also Figure 8 When it is necessary to adjust the cavity and install another spherical mirror of the laser, the spherical mirror is installed into the clamping structure 5, and the lifting cylinder 91 descends to drive the positioning plate 92, so that the positioning shaft 93 presses down the side of the spherical mirror to make it fit into the clamping cavity of the clamping structure 5. At this time, the lifting cylinder 91 drives the driving tube 74 to move downward through the connecting plate 20. At this time, the rotating part 311 (slave bevel gear) is separated from the main bevel gear 73, and the square tube 75 at the top of the driving tube 74 is inserted into the rotating part 23 (square sleeve). At this time, the driving motor 72 is working, and the driving shaft 721 drives the driving tube 74 to rotate. The driving tube 74 drives the rotating tube 21 to rotate ninety degrees through the square tube 75, and the clamping structure 5 and other components are switched to align the clamping structure 5 with another installation position of the laser. During the rotation process, the positioning plate 92 and the positioning shaft 93 can limit the spherical mirror.

[0115] See also Figure 7 When the laser needs to be limited, the lifting cylinder 91 lowers the positioning plate 92, and the positioning shaft 93 is not in contact with the spherical mirror; the connecting plate 20 drives the driving tube 74 to move downward, so that the square tube 75 is sleeved on the driving member 83 (square shaft). At this time, the rotating member 311 is separated from the main bevel gear 73. At this time, the driving motor 72 drives the driving tube 74 to rotate, and the square tube 75 drives the driving member 83 to rotate, thereby driving the threaded shaft 81 to rotate, thereby adjusting the clamping device 8 to limit the laser.

[0116] Thus, the driving device 7 can sequentially drive the moving device 31 to work and the support plate structure 2 to switch positions and drive the clamping device 8 to limit the laser. In the switching of functions, the positioning device 9 can act on the spherical mirror to make it fit with the clamping cavity.

[0117] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cavity tuning device for assembling a laser gyroscope, characterized in that: include: Workbench; A placing platform, the placing platform is arranged on the workbench; A guide structure, comprising a mounting plate and a guide rod, wherein the guide rod is horizontally mounted on the support platform via the mounting plate, and an end portion of the guide rod is configured to be tapered; A macro-adjustment platform, wherein the macro-adjustment platform is mounted on the workbench through a support plate structure, and comprises a moving device, a horizontal plate, a longitudinal plate, a rotating frame, and a turret. The horizontal plate is slidably mounted on the output end of the moving device, the longitudinal plate is vertically slidably connected to the horizontal plate, the turret is horizontally rotatably mounted on the longitudinal plate, and the turret is vertically rotatably mounted in the turret. The moving device is used to drive the horizontal plate to move toward the placing platform. A fine-tuning platform is mounted on the rotating frame, and a positioning ear is mounted on the fine-tuning platform. The positioning ear has a positioning hole, and the diameter of the positioning hole is the same as the diameter of the guide rod. When adjusting the cavity, the positioning hole is aligned with the guide rod; A clamping structure is installed on the fine-tuning platform.

2. The cavity tuning device for assembling a laser gyroscope according to claim 1, characterized in that: The support plate structure includes a rotating tube, an assembly frame and a rotating part. The rotating tube is rotatably installed on the support plate of the workbench. The rotating tube is concentrically arranged with the supporting platform. The assembly frame is installed on the rotating tube and is located between the supporting platform and the support plate. The moving device is installed on the assembly frame. There are two guide structures, and the two guide structures are arranged at ninety degrees on the supporting platform.

3. The cavity adjustment device for assembling a laser gyroscope according to claim 2, characterized in that: The moving device includes a rotating member, a screw rod, a nut and a mounting bracket, the mounting bracket is installed at the bottom of the assembly frame, the screw rod is rotatably mounted on the mounting bracket, the nut is threadedly connected to the screw rod, and the nut is slidably mounted on the mounting bracket, the rotating member is used to drive the screw rod to rotate, and the horizontal plate is slidably mounted on the top of the nut.

4. The cavity adjustment device for assembling a laser gyroscope according to claim 3, characterized in that: The moving device further comprises a sliding rod, the sliding rod is slidably mounted in the mounting frame, and the nut is sleeved on the sliding rod.

5. The cavity adjustment device for assembling a laser gyroscope according to claim 3, characterized in that: The rotating frame includes a bracket and a rotating motor, the bracket is rotatably mounted on the longitudinal plate, the rotating motor is mounted on the side wall of the bracket, and the rotating frame is mounted on the output shaft of the rotating motor. The cavity adjustment device for assembling a laser gyroscope also includes a positioning device, and the positioning device includes a lifting cylinder, a positioning plate and a positioning shaft. The lifting cylinder is installed on the mounting frame, and the output shaft of the lifting cylinder passes through the mounting frame and the assembly frame in sequence and then connects to the positioning plate. The positioning shaft is installed at the bottom of the positioning plate, and the positioning plate is suspended above the clamping structure.

6. The cavity adjustment device for assembling a laser gyroscope according to claim 5, characterized in that: The cavity adjustment device for assembling a laser gyroscope also includes a clamping device, which includes a threaded shaft, a threaded sleeve, a driving member, a plurality of L-shaped arms and a plurality of pressure blocks. The threaded shaft is rotatably mounted inside the supporting platform, the threaded sleeve is threadedly connected to the threaded shaft, and a plurality of L-shaped arms are arranged around the threaded shaft, and one end of the L-shaped arm is connected to the threaded shaft, and the other end passes through the supporting platform, and each pressure block is rotatably mounted on the top end of a corresponding L-shaped arm.

7. The cavity tuning device for assembling a laser gyroscope according to claim 6, characterized in that: The cavity adjustment device for assembling a laser gyroscope further includes a driving device and a connecting plate. The driving device includes a fixing frame, a driving motor, a main bevel gear, a driving tube and a square tube. The driving motor is mounted on the bottom of the workbench through the fixing frame. The driving tube is keyed to the driving shaft of the driving motor. The main bevel gear is sleeved and fixedly mounted on the driving tube. The square tube is mounted on the top of the driving tube. One end of the connecting plate is connected to the driving tube through a rotating member, and the other end is connected to the output end of the lifting cylinder. The rotating member is a square sleeve, which is mounted on the bottom end of the rotating tube. The rotating tube is sleeved on the driving tube, and the inner cavity of the rotating member is the same size as that of the square tube. The rotating member is a slave bevel gear, which is mounted on the screw rod and meshes with the master bevel gear.

8. The cavity tuning device for assembling a laser gyroscope according to claim 7, characterized in that: The driving member is a square shaft, which is installed at the bottom end of the threaded shaft. The driving member and the inner cavity of the square tube are the same size. When the main bevel gear is engaged with the rotating member, the driving tube is sleeved on the driving member, and the square tube is located above the driving member.

9. The cavity tuning device for assembling a laser gyroscope according to claim 7, characterized in that: The cavity adjustment device for assembling a laser gyroscope also includes a limiting structure, which includes a driving plate and a limiting block. The driving plate is connected to the connecting plate, and the limiting block is installed on the driving plate. A positioning port is provided on the fixing frame, and the limiting block is connected to the positioning port with a sliding key.

10. The cavity adjustment device for assembling a laser gyroscope according to claim 2, characterized in that: The workbench is provided with a slide rail, and one end of the assembly frame away from the rotating tube is slidably connected to the slide rail.

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