Range finder calibrating device and calibrating method

Abstract

The invention discloses a range finder calibrating device, and relates to the technical field of calibrating devices, the range finder calibrating device comprises a track support, and also comprises a slide rail which is fixedly installed at the top end of the track support, and a rack is fixedly installed at the bottom end of the outer side wall of the slide rail; the sliding seat is slidably mounted on one side of the sliding rail, a transmission shaft is rotatably mounted at the bottom end of the outer side wall of the sliding seat through a supporting plate, and a first gear and a second gear are mounted in the middle and at the bottom end of the transmission shaft correspondingly; the expansion bodies are fixedly connected between the first gear and the second gear, staggered holes are formed between the adjacent expansion bodies, when the temperature rises, the expansion bodies drive the second gear to move downwards, and the opening area of the staggered holes close to the rack end is increased; according to the device, the return stroke error of gear transmission is eliminated, it is effectively guaranteed that no idle stroke exists when the sliding seat is started, stopped and reversed at any position on the sliding rail, a solid foundation is laid for achieving high-precision distance positioning, and the calibration precision of the device on the range finder is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of calibration device technology, and in particular to a rangefinder calibration device and calibration method. Background Technology

[0002] As a precision measuring tool, the accuracy and reliability of laser rangefinders are of paramount importance. They must be calibrated regularly by a calibration device. Traditional rangefinder calibration devices typically use guide rails and sliding mechanisms to provide a known, adjustable standard distance. Among these, rack and pinion drives are widely used in driving sliding mechanisms due to their simple structure, high transmission efficiency, and unrestricted stroke length.

[0003] The publication number CN108344986B belongs to the technical field of geometric measurement device calibration device, and relates to a laser rangefinder calibration device, especially an automatic calibration system and calibration method for a handheld laser rangefinder, including a multi-degree-of-freedom adjustable gimbal, a calibration platform and a traveling measuring vehicle. The multi-degree-of-freedom adjustable gimbal is integrally mounted with a clamping device, and the multi-degree-of-freedom adjustable gimbal is fixed to one end of the calibration platform by the clamping device.

[0004] However, gear and rack transmissions have an inherent technical challenge: backlash. Due to manufacturing precision and assembly requirements, a tiny gap inevitably exists between the meshing gears and rack. This gap causes the driving gear to idle for a certain angle before moving the driven component when switching between forward and reverse rotation, resulting in "backlash" or "return error." In rangefinder calibration devices, this return error is directly transmitted to the positioning accuracy of the slide, causing deviations in the standard distance readings and severely affecting the accuracy and reliability of the calibration results.

[0005] However, vibrations are generated during the gear and rack transmission process, which further affect the stability of the upper detection lens, thereby reducing the accuracy of subsequent main calibration of the rangefinder.

[0006] Furthermore, if the external temperature changes, the gear and rack will deform synchronously under the principle of thermal expansion and contraction. For example, when the temperature rises, the gear and rack expand, and the gap between the gear and rack decreases during gear and rack insertion transmission, resulting in friction and collision. When the temperature drops, the gear and rack contract, and tooth backlash occurs during gear and rack insertion transmission, thus also resulting in "idle" or "backlash error".

[0007] If gears and racks are exposed to the external environment for a long time, dust and impurities can easily adhere to their outer surfaces, causing wear between them during transmission and reducing the strength of each structure. Summary of the Invention

[0008] The purpose of this invention is to provide a rangefinder calibration device and calibration method to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a rangefinder calibration device, comprising a track support, and further comprising: a slide rail, which is fixedly installed at the top of the track support, and a rack is fixedly installed at the bottom of the outer side wall of the slide rail; a slide block, which is slidably installed on one side of the slide rail, and a drive shaft is rotatably installed at the bottom of the outer side wall of the slide block via a support plate, and a first gear and a second gear are respectively installed at the middle and bottom of the drive shaft; an expansion body, which is fixedly connected between the first gear and the second gear, and a misalignment hole is formed between adjacent expansion bodies. When the temperature rises, the expansion body drives the second gear to move downward, and the opening area of ​​the misalignment hole near the rack end increases; a conical rod, which is fixedly disposed on the lower surface of the first gear. When the second gear moves downward, the second gear and the conical rod are pressed and rotated, and the overlapping area at the misalignment point of the first gear and the second gear increases.

[0010] Preferably, a rangefinder bracket is fixedly installed at one end of the track support, and a rangefinder body is fixedly installed at the top of the rangefinder bracket. A clamp is installed on one side of the slide. The top of the slide has a convex structure, and the top of the clamp has a concave structure that matches the slide. The clamp is slidably installed on the other side of the slide rail. The side wall of the support plate is fixedly connected to the side wall of the clamp. The diameter of the conical rod gradually increases from top to bottom and the bottom end has a hemispherical structure. Both the first gear and the second gear mesh with the rack.

[0011] Preferably, it further includes: a baffle, which is located on the inner wall and top of the misalignment hole and fixedly connected to the bottom of the first gear, for partially blocking the misalignment hole; a baffle, which is movably connected inside the baffle, for adjusting the opening area of ​​the misalignment hole, and an elastic column is fixedly installed on the top of the baffle, the top of the elastic column being fixedly connected to the inner top of the baffle, and the baffle being ferromagnetic; a magnetic block, which is fixedly installed on the bottom of the support plate and near the rack, the magnetic block being magnetic and applying magnetic attraction force to the baffle, and when the baffle rotates to the bottom of the baffle, the magnetic block applies magnetic attraction force to the baffle and causes the baffle to move upward along the baffle, pressing the elastic column, into the baffle.

[0012] Preferably, it further includes: a reservoir, which is fixedly installed on the top of the support plate and stores lubricating oil inside; a rotating ring, which is fixedly installed on the bottom of the support plate and located on the outer surface of the drive shaft, and has an inner cavity for the flow of lubricating oil; a connecting pipe, one end of which passes through the support plate and is connected to the bottom output end of the reservoir, and the other end passes through the rotating ring and is connected to the inner cavity, so that the lubricating oil inside the reservoir enters the inner cavity of the rotating ring along the connecting pipe; and a guide hole, which is located inside the drive shaft, with one end connected to the inner cavity of the rotating ring and the other end connected to the first gear and the second gear, so that the lubricating oil in the inner cavity of the rotating ring is discharged along the guide hole to the space between the first gear and the second gear for storage.

[0013] Preferably, it further includes: a positioning through hole and a screw hole, the positioning through hole being provided through the top of the outer side wall of the slide, the screw hole being provided on the top of the side of the clamp near the slide and coinciding with the positioning through hole, the positioning through hole and the screw hole being used to cooperate with bolts to fix the position between the slide and the clamp; a guide groove, which is provided on the upper surface of the second gear and is provided as a spiral structure, the bottom of the guide groove is provided as an arc structure adapted to the conical rod, and the side wall of the guide groove is in contact with the outer surface of the conical rod.

[0014] Preferably, it further includes: a pressure groove, which is located in the middle of the lower surface of the second gear; a reset ring, the top of which is in mutual compression contact with the bottom of the pressure groove, and the reset ring is elastic; and a clamping nut, which is threadedly installed at the bottom end of the drive shaft and the top end is in compression contact with the bottom of the reset ring, and when the clamping nut rotates, it applies an upward elastic support force to the second gear through the reset ring.

[0015] Preferably, it further includes: a worm gear and a worm, the worm gear being fixedly installed at the top of the transmission shaft, and the worm being rotatably installed at the bottom outer side of the support plate and meshing with the worm gear; a servo motor, which is fixedly installed at the bottom outer side of the support plate, the output shaft of the servo motor being connected to one end of the worm, the servo motor being used to provide power for the rotation of the transmission shaft and the sliding of the slide; and positioning wheels, which are provided in two and rotatably installed at the bottom outer side wall of the slide, the positioning wheels being used to fit against the outer side wall of the slide rail to limit the distance between the first gear, the second gear and the rack.

[0016] Preferably, it further includes: a detection lens mounted on the top of the slide, a lens bracket fixedly mounted on the outside of the detection lens; a positioning seat mounted on one side of the lens bracket; a movable seat and a mounting seat, the movable seat being fixedly mounted on the bottom of the positioning seat, the mounting seat being fixedly mounted on the top of the slide, and the movable seat being slidably mounted inside the mounting seat.

[0017] Preferably, it further includes: an axial adjusting screw, which is rotatably mounted inside the mounting base, and a threaded groove adapted to the axial adjusting screw is provided through the middle of the movable base. The axial adjusting screw and the threaded groove are used to adjust the position of the movable base and the detection lens to ensure that the detection lens and the central axis of the rangefinder body are coincident; two adjusting screw grooves are provided and are respectively located at opposite corners of the outer wall of the positioning base; two adjusting bolts are provided and are respectively installed inside the two adjusting screw grooves by threads; two spherical blocks and two spherical grooves are provided and are respectively fixedly installed at one end of the two adjusting bolts, and two spherical grooves are provided and are respectively located at opposite corners on one side of the lens bracket, and the two spherical blocks are respectively located in the two spherical grooves.

[0018] A calibration method for a rangefinder calibration device, wherein the calibration method utilizes the rangefinder calibration device as described above to calibrate the rangefinder, comprising the following steps: Step 1: Install the rangefinder body on the top of the rangefinder bracket, and install the slide and clamp combination on the upper part of the slide rail near the rangefinder body; Step 2: The second gear moves upward and approaches the first gear. Under the squeezing action of the conical rod and the guide groove, the second gear rotates and misaligns with the first gear, eliminating the meshing gap between the first and second gears relative to the rack. Step 3: When the first gear and the second gear rotate to the bottom of the magnetic block, the magnetic block applies a magnetic attraction force to the baffle and moves it upward along the baffle to the inside of the baffle. The lubricating oil between the first gear and the second gear is discharged and flushed out along the misalignment hole. Step 4: When the outside temperature rises, the expansion body expands downward and drives the second gear to move downward. The distance between the second gear and the first gear increases. The second gear drives the guide groove to move downward along the conical rod. The diameter of the conical rod at the contact position between the guide groove and the conical rod decreases. The overlapping area of ​​the second gear and the misalignment point with the first gear increases. Step 5: When the expander expands downward and drives the second gear to move downward, the height of the misalignment hole increases. When the baffle rotates to the bottom of the magnetic block, it moves along the baffle into the inside of the baffle under the magnetic attraction of the magnetic block, and the amount of lubricating oil discharged from the misalignment hole increases.

[0019] The technical effects and advantages of this invention are as follows: 1. In this invention, the backlash elimination mechanism formed by the combination of the first gear and the second gear eliminates the backlash error of the gear transmission, effectively ensuring that there is no backlash when the slide block starts, stops and reverses at any position on the slide rail, laying a solid foundation for achieving high-precision distance positioning.

[0020] 2. In this invention, by setting a movable seat and a mounting seat, the movable seat can slide axially within the mounting seat to adjust the position of the detection lens. This allows the detection lens to be adjusted in multiple degrees of freedom after installation, ensuring that the optical axis of the detection lens and the optical axis of the rangefinder body are coaxial, further improving the measurement accuracy of the device.

[0021] 3. In this invention, by setting a rotating ring and a guide hole, lubricating oil continuously enters between the first gear and the second gear, and is eventually discharged along the misalignment hole, effectively achieving the flushing effect on the first gear, the second gear and the rack, and avoiding the attachment of impurities on their outer surfaces, which would affect the accuracy of calibration.

[0022] 4. In this invention, by setting an expansion body and a conical rod, when the external temperature rises, the second gear moves downward, which corresponds to the rotation of the second gear and reduces the overlapping area at the misalignment point with the first gear, thereby further compensating for the temperature change of the rack and ensuring the subsequent transmission accuracy.

[0023] 5. In this invention, by setting a reset ring, the first gear and the second gear are elastically supported, which effectively buffers the vibration during the transmission process and prevents it from being transmitted upward to the detection lens, thus reducing the detection accuracy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the slide and rack structure of the present invention; Figure 4 This is a schematic diagram of the second gear and rack structure of the present invention; Figure 5 This is a schematic diagram of the slide structure of the present invention; Figure 6 This is a schematic diagram of the worm gear and worm structure of the present invention; Figure 7 This is a schematic diagram of the transmission shaft, first gear, and second gear of the present invention; Figure 8 This is a schematic diagram of the first gear and the second gear structure of the present invention; Figure 9 This is a schematic diagram of the second gear structure of the present invention; Figure 10 This is a schematic diagram of the detection lens structure of the present invention; Figure 11 This is a schematic diagram of the first and second gear structures of the present invention; Figure 12 This is a schematic diagram of the internal structure of the first and second gears of the present invention; Figure 13 for Figure 12 Enlarged diagram of point A in the middle.

[0025] In the diagram: 1. Track support; 2. Slide rail; 3. Rack; 4. Slide block; 11. Rangefinder support; 12. Rangefinder body; 41. Clamp; 42. Drive shaft; 43. First gear; 44. Second gear; 45. Worm gear; 46. Worm; 47. Servo motor; 48. Positioning wheel; 49. Support plate; 411. Positioning through hole; 412. Screw hole; 431. Conical rod; 432. Expansion body; 433. Misalignment hole; 434. Cover; 435. Elasticity 436. Column; 437. Baffle; 441. Magnetic block; 442. Guide groove; 443. Pressure groove; 444. Clamping nut; 445. Reset ring; 491. Liquid storage tank; 492. Connecting pipe; 493. Rotating ring; 494. Guide hole; 5. Detection lens; 51. Lens bracket; 52. Positioning seat; 521. Adjusting screw groove; 53. Adjusting bolt; 54. Spherical block; 541. Spherical groove; 55. Movable seat; 56. Mounting seat; 57. Axial adjusting screw. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0027] like Figures 1 to 10 As shown, the rangefinder calibration device provided by the present invention is essentially a rangefinder calibration device that can eliminate gear transmission backlash error.

[0028] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0029] In this embodiment, a rangefinder calibration device includes: a track support 1, one end of which a rangefinder support 11 is fixedly installed, and the top end of the rangefinder support 11 is fixedly installed with a rangefinder body 12. The track support 1 serves as the support structure of the device and is made of carbon steel or aluminum alloy to ensure structural stability.

[0030] The slide rail 2 is fixedly installed on the top of the track bracket 1. The slide rail 2 is a high-precision linear guide rail with a dovetail-shaped cross-section. A rack 3 is fixedly installed on the bottom of the outer wall of the slide rail 2. The slide seat 4 is slidably installed on one side of the slide rail 2. A clamp 41 is installed on one side of the slide seat 4, and the clamp 41 is slidably installed on the other side of the slide rail 2. A drive shaft 42 is rotatably installed on the bottom of the outer wall of the slide seat 4 through a support plate 49. A bearing is fixedly installed between the drive shaft 42 and the support plate 49. A first gear 43 and a second gear 44 are respectively installed in the middle and at the bottom of the drive shaft 42. Both the first gear 43 and the second gear 44 mesh with the rack 3. The first gear 43 is connected to the drive shaft 42 through a keyway to ensure that the drive shaft 42 stably drives the first gear 43 to rotate. The slide seat 4 and the clamp 41 are combined to form a sliding width that can slide along the slide rail 2. The cross-section of the sliding width after the slide seat 4 and the clamp 41 are combined is dovetail-shaped.

[0031] The positioning through hole 411 and the screw hole 412 are provided. The positioning through hole 411 is provided through the top of the outer side wall of the slide 4, and the screw hole 412 is provided on the top of the side of the clamp 41 near the slide 4 and coincides with the positioning through hole 411. The positioning through hole 411 and the screw hole 412 are used to fix the position between the slide 4 and the clamp 41 with the bolt. The top of the slide 4 is a "convex" structure, and the top of the clamp 41 is a "concave" structure that matches the slide 4. The side wall of the support plate 49 is fixedly connected to the side wall of the clamp 41. The movement of the support plate 49 synchronously drives the movement of the clamp 41.

[0032] A conical rod 431 is fixedly mounted on the lower surface of the first gear 43 and has a hemispherical bottom. A guide groove 441 is mounted on the upper surface of the second gear 44 and has a spiral structure. The bottom of the guide groove 441 is an arc-shaped structure that fits the conical rod 431, and the sidewall of the guide groove 441 is in contact with the outer surface of the conical rod 431. The guide groove 441 is an Archimedean spiral groove, and the bottom of the groove is polished to reduce friction with the conical rod 431.

[0033] A pressure groove 442 is located in the middle of the lower surface of the second gear 44; a reset ring 444, the top of which is pressed against the bottom of the pressure groove 442, is elastic and is used to elastically press the first gear 43 and the second gear 44 together, further improving the clamping stability between them; a clamping nut 443 is threaded onto the bottom end of the transmission shaft 42 and its top end is pressed against the bottom of the reset ring 444. When the clamping nut 443 rotates, it applies an upward elastic support force to the second gear 44, causing the second gear 44 to move closer to the first gear 43. When the second gear 44 moves, the bottom end of the conical rod 431 is pressed against the bottom of the guide groove 441, causing the second gear 44 and the first gear 43 to rotate relative to each other, so that the second gear 44 and the first gear 43 are misaligned. After the first gear 43 and the second gear 44 are misaligned, the gap between them and the rack 3 is eliminated.

[0034] The worm gear 45 and worm 46 are fixedly mounted on the top of the transmission shaft 42, and the worm 46 is rotatably mounted on the bottom outer side of the support plate 49 and meshes with the worm gear 45. The worm gear 45 and worm 46 not only achieve transmission reduction, but also provide reverse self-locking to prevent the slide 4 from sliding due to external force when it stops. The servo motor 47 is fixedly mounted on the bottom outer side of the support plate 49. The output shaft of the servo motor 47 is connected to one end of the worm 46. The servo motor 47 is used to provide power for the rotation of the transmission shaft 42 and the sliding of the slide 4. There are two positioning wheels 48, both of which are rotatably mounted on the bottom outer side wall of the slide 4. The positioning wheels 48 are used to fit against the outer side wall of the slide rail 2 to limit the distance between the first gear 43, the second gear 44 and the rack 3.

[0035] The detection lens 5 is mounted on the top of the slide 4. The detection lens 5 is either a corner prism or a standard plane mirror, and its selection is determined by the model of the rangefinder body 12. The lens bracket 51 is fixedly mounted on the outside of the detection lens 5. The positioning seat 52 is mounted on one side of the lens bracket 51. There are two adjusting screw grooves 521, which are respectively located at opposite corners of the outer wall of the positioning seat 52. There are two adjusting bolts 53, which are respectively threaded into the two adjusting screw grooves 521. The movable seat 55 is fixedly mounted on the bottom of the positioning seat 52, and the mounting seat 56 is fixedly mounted on the top of the slide 4. The movable seat 55 is slidably mounted inside the mounting seat 56.

[0036] Two spherical blocks 54 are provided and fixedly installed at one end of two adjusting bolts 53 respectively. Two spherical grooves 541 are provided and respectively located at opposite corners on one side of the lens bracket 51. The two spherical blocks 54 are respectively located in the two spherical grooves 541. An axial adjusting screw 57 is rotatably installed inside the mounting base 56. A threaded groove adapted to the axial adjusting screw 57 is provided through the middle of the movable seat 55. The axial adjusting screw 57 and the threaded groove are used to adjust the position of the movable seat 55 and the detection lens 5 to ensure that the detection lens 5 coincides with the central axis of the rangefinder body 12.

[0037] In use, the rangefinder body 12 to be tested is installed on the top of the rangefinder bracket 11, and the optical axis of the rangefinder body 12 is aligned with the central axis of the slide rail 2. Then, the slide 4 is placed on the upper side of the slide rail 2, and the clamp 41 is placed on the other side of the slide rail 2. The slide 4 and the clamp 41 are pushed horizontally so that the protrusion of the slide 4 is inserted into the recess of the clamp 41. At this time, the slide 4 and the clamp 41 are combined above the slide rail 2. The bolt is inserted into the positioning through hole 411 and one end of the bolt is screwed into the screw hole 412 to lock the position of the slide 4 and the clamp 41. In this state, the first gear 43 and the second gear 44 are initially meshed with the rack 3, and the positioning wheel 48 at the bottom of the slide 4 is in contact with the outer wall of the slide rail 2.

[0038] After the slide block 4 is installed, rotate the clamping nut 443 to move it upward. The clamping nut 443 presses the second gear 44 upward, causing the second gear 44 to move upward and approach the first gear 43. At this time, the conical rod 431 below the first gear 43 is inserted into the guide groove 441 on the upper surface of the second gear 44. With the tightening of the clamping nut 443, the second gear 44 continues to move upward, while the conical rod 431 and the bottom of the guide groove 441 press against each other and slide against each other under the guidance of the spiral shape of the guide groove 441. During this process, the second gear 44 and the first gear 43 slide relative to each other and tend to be misaligned. After misalignment, the first gear 43 and the second gear 44 respectively fit against the inner walls on both sides of the same tooth groove on the rack 3. At this time, the gear gap between the first gear 43, the second gear 44 and the rack 3 is eliminated, and the slide block 4 is installed.

[0039] After the slide block 4 is installed, rotate the axial adjustment screw 57. The axial adjustment screw 57 drives the movable seat 55 to slide under the action of the thread, so that the movable seat 55 slides axially inside the mounting seat 56, thereby allowing the detection lens 5 to slide along the direction perpendicular to the slide rail 2. Rotate the two adjustment bolts 53 in sequence. The two adjustment bolts 53 drive the two spherical blocks 54 to move respectively. The two spherical blocks 54 slide in the two spherical grooves 541 respectively, so as to adjust the pitch angle of the lens bracket 51. Adjust the position and pitch angle of the lens bracket 51 until the lens bracket 51 coincides with the optical axis of the rangefinder body 12, and the preparation before calibration is completed.

[0040] When calibrating the rangefinder body 12, the servo motor 47 is started. The servo motor 47 drives the worm gear 46 to rotate, the worm gear 46 drives the worm wheel 45 to rotate, the worm wheel 45 drives the transmission shaft 42 to rotate, and the transmission shaft 42 drives the first gear 43 and the second gear 44 to rotate. The first gear 43 and the second gear 44 slide along the rack 3, so that the slide block 4 drives the detection lens 5 to slide along the slide rail 2, thereby adjusting the distance between the detection lens 5 and the rangefinder body 12. After the detection lens 5 reaches a certain position, the rangefinder body 12 is started. The laser emitted by the rangefinder body 12 shines on the detection lens 5 and is reflected back to the receiving part of the rangefinder body 12, thereby acquiring detection data. By comparing the moving distance of the detection lens 5 with the detection data of the rangefinder body 12, the calibration of the rangefinder body 12 can be completed. Example

[0041] While the above embodiments solve the problems of "idle travel" or "backlash error," the first gear 43 and the second gear 44 will vibrate during continuous rotation and contact with the rack 3. This vibration further affects the stability of the upper detection lens 5, thereby reducing the accuracy of subsequent calibration of the rangefinder body 12. Furthermore, if the external temperature changes, the first gear 43, the second gear 44, and the rack 3 will deform synchronously under the principle of thermal expansion and contraction. For example, when the temperature rises, the first gear 43, the second gear 44, and the rack 3 will expand, and friction and collision will occur in the gaps when the first gear 43, the second gear 44, and the rack 3 are inserted and transmitted. When the temperature drops, the first gear 43, the second gear 44, and the rack 3 will contract, and tooth side clearance will occur when the first gear 43, the second gear 44, and the rack 3 are inserted and transmitted, thus also resulting in "idle travel" or "backlash error." When the first gear 43, the second gear 44, and the rack 3 are exposed to the external environment for a long time, impurities and other substances are easily adhered to their outer surfaces, which can easily affect the calibration accuracy during transmission.

[0042] To address the aforementioned issues, the rangefinder calibration device further includes: an expansion body 432, which is fixedly connected between the first gear 43 and the second gear 44. The expansion body 432 operates on the principle of thermal expansion and contraction, and a misalignment hole 433 is formed between adjacent expansion bodies 432. Lubricating oil between the first gear 43 and the second gear 44 can be discharged along the misalignment hole 433. When the temperature rises, the expansion body 432 drives the second gear 44 to move downward, increasing the opening area of ​​the misalignment hole 433 near the rack 3 end. This increases the amount of lubricating oil sprayed along the misalignment hole 433 scouring the outer surfaces of the first gear 43, the second gear 44, and the rack 3. The diameter of the conical rod 431 gradually increases from top to bottom, and its bottom end has a hemispherical structure. When the second gear 44 moves downward, it presses against the conical rod 431 and rotates. The overlapping area at the misalignment point of the first gear 43 and the second gear 44 increases, thereby preventing the first gear 43 and the second gear 44 from pressing against and rubbing against the sidewalls of the adjacent tooth grooves of the rack 3 under high temperature conditions.

[0043] A baffle 434, located on the inner wall and top of the misalignment hole 433 and fixedly connected to the bottom of the first gear 43, partially blocks the misalignment hole 433. The height of the baffle 434 is less than the initial height of the expansion body 432 but greater than half its height, allowing the lubricant between the first gear 43 and the second gear 44 to flow and drain below the baffle 434. A baffle 436, movably connected inside the baffle 434, adjusts the opening area of ​​the misalignment hole 433. The baffle 436 presses against the top of the second gear 44 to seal the misalignment hole 433. An elastic column 435 is fixedly installed on the top of the plate 436. The top of the elastic column 435 is fixedly connected to the inner top of the baffle 434. The elastic column 435 is elastic and applies elastic force to the baffle 436 so that it is squeezed and sealed to the top of the second gear 44. At the same time, multiple expansion bodies 432, baffle 434 and baffle 436 elastically seal and wrap the first gear 43 and the second gear 44 to prevent external dust and impurities from entering the first gear 43 and the second gear 44 and causing contamination. The baffle 436 is ferromagnetic, so it can be magnetically attracted by the magnetic block 437 and move upward.

[0044] Magnetic block 437 is fixedly installed at the bottom of support plate 49 and near rack 3. Magnetic block 437 is magnetic and applies magnetic attraction to baffle 436. When baffle 436 rotates to a position below baffle 436, magnetic block 437 applies magnetic attraction to baffle 436, causing baffle 436 to move upward along baffle 434, pressing elastic column 435 into the baffle 434. At this time, baffle 436 no longer blocks the area below misalignment hole 433. Lubricating oil between first gear 43 and second gear 44 can be sprayed along the baffle 434 to the outer surface of first gear 43, second gear 44, and rack 3 for flushing and cooling, preventing external dust and other substances from adhering to the surface and causing wear to subsequent transmission, thus affecting calibration accuracy.

[0045] A reservoir 491 is fixedly installed on the top of the support plate 49, and stores lubricating oil inside. A pump body is installed inside the reservoir 491 to pump the lubricating oil. A rotating ring 493 is fixedly installed at the bottom of the support plate 49 and located on the outer surface of the drive shaft 42. The rotating ring 493 has an inner cavity for flowing lubricating oil, and the inner cavity is located near the drive shaft 42. A connecting pipe 492 has one end passing through the support plate 49 and connecting to the bottom output end of the reservoir 491, and the other end passing through the rotating ring 493 and connecting to the bottom output end of the reservoir 491. The inner cavities are interconnected. The lubricating oil inside the storage tank 491 enters the inner cavity of the rotating ring 493 along the connecting pipe 492, filling the inner cavity with lubricating oil, which further facilitates the subsequent flushing and discharge of lubricating oil. The guide hole 494 is located inside the transmission shaft 42, with one end connected to the inner cavity of the rotating ring 493 and the other end connected to the first gear 43 and the second gear 44. The lubricating oil in the inner cavity of the rotating ring 493 is discharged along the guide hole 494 to the space between the first gear 43 and the second gear 44 for storage. The design of the guide hole 494 facilitates the guiding flow of lubricating oil.

[0046] In use, the components are installed according to the above embodiment. Initially, the first gear 43 is engaged and fixed with the keyway on the outer surface of the transmission shaft 42. The second gear 44 is then installed upwards along the transmission shaft 42 to its initial position. Next, the reset ring 444 is fitted under the pressure groove 442, and a clamping nut 443 is threaded onto the outer surface of the transmission shaft 42. During this process, the clamping nut 443 continuously applies elastic support force to the bottom of the second gear 44 through the reset ring 444. The guide groove 441 of the second gear 44 and the conical rod 431 press against each other, while simultaneously... Under the elastic force of the elastic column 435, the baffle 436 moves downward along the baffle 434 and contacts and seals with the top of the second gear 44, forming a sealed space between the first gear 43 and the second gear 44. This effectively prevents external dust and impurities from entering between the first gear 43 and the second gear 44 and causing wear and affecting the clearance adjustment accuracy. It also prevents the lubricating oil stored between the first gear 43 and the second gear 44 from being discharged arbitrarily, realizing the directional flow and discharge of lubricating oil and scouring and cooling the first gear 43, the second gear 44, and the rack 3.

[0047] Simultaneously, the lubricating oil inside the storage tank 491 enters the connecting pipe 492 along the bottom output end, and then enters the inner cavity of the rotating ring 493 along the other end of the connecting pipe 492. Finally, it is evenly discharged between the first gear 43 and the second gear 44 through the guide hole 494 inside the transmission shaft 42 for storage. When the transmission shaft 42 rotates and drives the first gear 43 to rotate, the first gear 43 continuously meshes with the rack 3 and drives the detection lens 5 above to move, thereby realizing the adjustment of the gap between the detection lens 5 and the rangefinder body 12. When the baffle 436 rotates to the magnetic block 4 When the magnetic block 437 is below the baffle 436, the baffle 436 presses the elastic column 435 upward along the baffle 434 and enters the interior of the baffle 434. The baffle no longer blocks the misalignment hole 433 below the baffle 434. The lubricating oil between the first gear 43 and the second gear 44 is discharged along the bottom of the baffle 434 and sprayed onto the outer surface of the first gear 43, the second gear 44 and the rack 3, further achieving the flushing and cleaning effect, avoiding external impurities from adhering to their outer surface and causing mutual wear, which would affect the calibration accuracy.

[0048] When vibration occurs during the meshing and transmission of the first gear 43 or the second gear 44 with the rack 3, the vibration is synchronously transmitted to the transmission shaft 42. The vibration is then damped and buffered in the vertical direction by the elastic clamping of the first gear 43 and the second gear 44 by the reset ring 444, effectively preventing the vibration from being transmitted upward to the detection lens 5 end, and improving the quality of the laser emitted by the main body 12 of the reflection rangefinder.

[0049] When the external temperature changes, the first gear 43, the second gear 44, and the rack 3 deform differently under the principle of thermal expansion and contraction. For example, when the external temperature rises, the first gear 43, the second gear 44, and the rack 3 all expand and increase in volume. The tooth grooves between adjacent rack 3 decrease, so the volume of the expansion body 432 increases accordingly when the external temperature rises. The expansion body 432 drives the second gear 44 to move downward along the transmission shaft 42, pressing the reset ring 444. The gap between the first gear 43 and the second gear 44 increases. The reset ring 444 is used to realize the expansion margin of the second gear 44, avoiding the clamping nut 443 and the second gear 44 from affecting the compression and causing damage to their structure.

[0050] As the second gear 44 moves downward and increases the distance between it and the first gear 43, when the baffle 436 rotates to the area below the magnetic block 437, the magnetic block 437 applies a magnetic attraction force to the baffle 436, causing it to press the elastic column 435 upward along the baffle 434 into the baffle 434. The opening area of ​​the misalignment hole 433 below the baffle 434 increases, and the amount of lubricating oil discharged between the first gear 43 and the second gear 44 along the misalignment hole 433 increases. With the help of this flow of lubricating oil, not only is the flushing and cleaning effect on the outer surfaces of the first gear 43, the second gear 44 and the rack 3 improved, but the cooling efficiency of the lubricating oil on the first gear 43, the second gear 44 and the rack 3 is further enhanced, preventing them from being in a high-temperature state for a long time and affecting their normal meshing transmission.

[0051] Furthermore, when the second gear 44 moves downward below the first gear 43, the second gear 44 correspondingly drives the guide groove 441 to move downward. The diameter of the conical rod 431 gradually increases from top to bottom. Therefore, the diameter of the contact position between the guide groove 441 and the conical rod 431 decreases, and there is a gap between the guide groove 441 and the conical rod 431. When the first gear 43 rotates and presses against one side of the tooth groove of the rack 3, the second gear 44 rotates with the first gear 43 and presses against the other side of the tooth groove of the rack 3. Under the pressing action of the tooth groove of the rack 3, the second gear 44 reverses below the first gear 43. The overlapping area at the misalignment of the first gear 43 and the second gear 44 increases. Therefore, the second gear 44 can still press against the tooth groove of the rack 3 for transmission, effectively avoiding its expansion and wear caused by meshing and pressing against the rack 3.

[0052] Similarly, when the external temperature drops, the expansion body 432 contracts due to its own thermal expansion and contraction. Under the elastic force of the reset ring 444, it drives the second gear 44 to move upward and reduces the gap between it and the first gear 43, further ensuring the elastic compression state of the first gear 43 and the second gear 44. The second gear 44 simultaneously drives the guide groove 441 to move upward, and the diameter of the contact position between the guide groove 441 and the conical rod 431 increases. Under the pushing action of the conical rod 431 on the guide groove 441, it rotates in the forward direction. The overlapping area at the misalignment of the first gear 43 and the second gear 44 decreases, ensuring that the second gear 44 can still fit tightly with the tooth groove of the rack 3, avoiding the problems of "idle stroke" or "return error" in the future.

[0053] At the same time, when the second gear 44 moves upward, the opening area of ​​the misalignment hole 433 is reduced accordingly. When the baffle 436 rotates to below the magnetic block 437, the baffle 436 is squeezed by the magnetic attraction of the magnetic block 437 to push the elastic column 435 into the interior of the baffle 434. The amount of lubricating oil discharged along the misalignment hole 433 between the first gear 43 and the second gear 44 is reduced, so as to avoid the lubricating oil from sticking and solidifying on the outer surface of the first gear 43, the second gear 44 and the rack 3 at low temperature and causing an impact.

[0054] When the temperature change is too large, for example, when the temperature is too high and exceeds the set maximum temperature, the expansion body 432 continues to expand and drives the second gear 44 to move downward. The second gear 44 further squeezes the reset ring 444. When the elastic deformation of the reset ring 444 has reached its maximum value, the second gear 44 can no longer move downward. The expansion of the first gear 43, the second gear 44 and the rack 3 continues to increase under heat. As a result, the first gear 43 and the second gear 44 engage with the tooth groove of the rack 3 during transmission. The first gear 43 and the second gear 44 can no longer rotate and are in a stopped state. At this time, it is only necessary to cool down the outside environment and then repeat the above process.

[0055] Similarly, when the temperature is too low and below the set minimum temperature, the volume of the expansion body 432 continues to shrink. The reset ring 444 drives the second gear 44 to move upward and press against the bottom of the cover 434. When the ferrous retaining ring 436 rotates to the bottom of the magnetic block 437, the second gear 44 presses against the bottom of the cover 434 and closes the misalignment hole 433. The lubricating oil between the first gear 43 and the second gear 44 cannot be discharged along the misalignment hole 433. Therefore, it is only necessary to observe the amount of lubricating oil discharged from the misalignment hole 433 to obtain the corresponding temperature. After stopping the machine and heating the outside environment, the above process is repeated.

[0056] Then repeat the above process to calibrate the subsequent rangefinder body 12. Example

[0057] A calibration method for a rangefinder calibration device, wherein the calibration method utilizes the aforementioned rangefinder calibration device to calibrate the rangefinder, comprising the following steps: Step 1: Install the rangefinder body 12 on the top of the rangefinder bracket 11, and install the slide block 4 and clamp 41 together on the slide rail 2 above one end near the rangefinder body 12. Step 2: The second gear 44 moves upward and approaches the first gear 43. Under the squeezing action of the conical rod 431 and the guide groove 441, the second gear 44 rotates and misaligns with the first gear 43, and the meshing gap between the first gear 43 and the second gear 44 relative to the rack 3 is eliminated. Step 3: When the first gear 43 and the second gear 44 rotate to the position below the magnetic block 437, the magnetic block 437 applies a magnetic attraction force to the baffle 436 and moves it upward along the baffle 434 into the baffle 434. The lubricating oil between the first gear 43 and the second gear 44 is discharged and flushed out along the misalignment hole 433. Step 4: When the outside temperature rises, the expansion body 432 expands downward and drives the second gear 44 to move downward. The distance between the second gear 44 and the first gear 43 increases. The second gear 44 drives the guide groove 441 to move downward along the conical rod 431. The diameter of the conical rod 431 at the contact position between the guide groove 441 and the conical rod 431 decreases. The overlapping area of ​​the second gear 44 at the misalignment point with the first gear 43 increases. Step 5: When the expansion body 432 expands downward and drives the second gear 44 to move downward, the height of the misalignment hole 433 increases. When the baffle 436 rotates to the bottom of the magnetic block 437, it moves along the baffle 436 into the baffle cover 434 under the magnetic attraction of the magnetic block 437, and the amount of lubricating oil discharged from the misalignment hole 433 increases.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A range finder verification device comprising a track support (1), characterised in that, Also include: The slide rail (2) is fixedly installed at the top end of the rail support (1), the outer side wall bottom end of the slide rail (2) is fixedly installed with a rack (3); The slide (4) is slidably installed on one side of the slide rail (2), the outer side wall bottom end of the slide (4) is rotatably installed with a transmission shaft (42) through a support plate (49), the middle part and the bottom end of the transmission shaft (42) are respectively provided with a first gear (43) and a second gear (44); The expansion body (432) is fixedly connected between the first gear (43) and the second gear (44), the adjacent expansion bodies (432) form a staggered hole (433), when the temperature rises, the expansion body (432) drives the second gear (44) to move downward, the opening area of the staggered hole (433) near the end of the rack (3) increases; The conical rod (431) is fixedly arranged on the lower surface of the first gear (43), when the second gear (44) moves downward, the second gear (44) and the conical rod (431) are extruded and rotated, the overlapping area of the first gear (43) and the second gear (44) at the staggered position increases.

2. A range finder verification device according to claim 1, wherein, The rail support (1) is fixedly installed with a range finder support (11) at one end, the top end of the range finder support (11) is fixedly installed with a range finder main body (12), one side of the slide (4) is installed with a clamping seat (41), the top end of the slide (4) is a "convex” structure, the top end of the clamping seat (41) is a "concave” structure matched with the slide (4), and the clamping seat (41) is slidably installed on the other side of the slide rail (2), the side wall of the support plate (49) is fixedly connected with the side wall of the clamping seat (41), the diameter value of the conical rod (431) gradually increases from top to bottom and the bottom end is a hemispherical structure, the first gear (43) and the second gear (44) are engaged with the rack (3).

3. A range finder verification device according to claim 2, wherein, Also include: The baffle (436) is movably connected inside the baffle cover (434), used for adjusting the opening area of the staggered hole (433), and the top of the baffle (436) is fixedly installed with an elastic column (435), the top of the elastic column (435) is fixedly connected with the inner top of the baffle cover (434), the baffle (436) has ferromagnetism; The magnetic block (437) is fixedly installed on the bottom of the support plate (49) and close to one side of the rack (3), the magnetic block (437) has magnetism and exerts magnetic attraction on the baffle (436), when the baffle (436) rotates to below the baffle (436), the magnetic block (437) exerts magnetic attraction on the baffle (436) and makes the baffle (436) move upward along the baffle cover (434) to the inside of the baffle cover (434) by extruding the elastic column (435). Also include:

4. The range finder verification device of claim 1, wherein, The liquid storage tank (491) is fixedly installed on the top of the support plate (49), and the inside of the liquid storage tank (491) stores lubricating oil; The rotating ring (493) is fixedly installed on the bottom of the support plate (49) and located on the outer surface of the transmission shaft (42), the inside of the rotating ring (493) is provided with an inner cavity for flowing lubricating oil; ​ A connecting pipe (492) is arranged through the support plate (49) and connected with the bottom output end of the liquid storage tank (491), and the other end of the connecting pipe (492) is arranged through the rotating ring (493) and connected with the inner cavity, and the lubricating oil in the liquid storage tank (491) enters the inner cavity of the rotating ring (493) through the connecting pipe (492); A guide hole (494) is arranged in the transmission shaft (42), and one end of the guide hole (494) is connected with the inner cavity of the rotating ring (493), and the other end of the guide hole (494) is connected between the first gear (43) and the second gear (44), and the lubricating oil in the inner cavity of the rotating ring (493) is discharged to the first gear (43) and the second gear (44) through the guide hole (494) for storage.

5. The range finder verification device of claim 2, wherein, Further comprising: A positioning through hole (411) and a screw hole (412) are arranged, the positioning through hole (411) is arranged through the top end of the outer side wall of the sliding seat (4), the screw hole (412) is arranged at the top end of the side of the clamping seat (41) close to the sliding seat (4) and coincides with the positioning through hole (411), and the positioning through hole (411) and the screw hole (412) are used for cooperating with the bolt to fix the position between the sliding seat (4) and the clamping seat (41); A guide groove (441) is arranged on the upper surface of the second gear (44) and has a spiral structure, the groove bottom of the guide groove (441) is arranged as an arc structure matched with the conical rod (431), and the side wall of the guide groove (441) is matched with the outer surface of the conical rod (431).

6. The range finder verification device of claim 1, wherein, Further comprising: A pressing groove (442) is arranged on the lower surface of the second gear (44); A reset ring (444) is arranged, and the top of the reset ring (444) is in extrusion contact with the bottom of the pressing groove (442), and the reset ring (444) has elasticity; A pressing nut (443) is arranged at the bottom end of the transmission shaft (42) through a threaded connection and is in extrusion contact with the bottom of the reset ring (444), and when the pressing nut (443) rotates, the reset ring (444) applies an upward elastic supporting force to the second gear (44).

7. The range finder verification device of claim 1, wherein, Further comprising: A worm wheel (45) and a worm (46) are arranged, the worm wheel (45) is fixedly installed at the top end of the transmission shaft (42), and the worm (46) is rotatably installed at the outer side bottom end of the support plate (49) and is engaged with the worm wheel (45); A servo motor (47) is fixedly installed at the outer side bottom end of the support plate (49), the output shaft of the servo motor (47) is in transmission connection with one end of the worm (46), and the servo motor (47) is used for providing power for the rotation of the transmission shaft (42) and the sliding of the sliding seat (4); Two positioning wheels (48) are arranged and rotatably installed at the bottom end of the outer side wall of the sliding seat (4), and the positioning wheels (48) are used for abutting with the outer side wall of the sliding rail (2) to limit the distance between the first gear (43), the second gear (44) and the rack (3).

8. The range finder verification device of claim 1, wherein, Further comprising: A detection lens (5) is arranged at the top end of the sliding seat (4); A lens bracket (51) is fixedly installed at the outer side of the detection lens (5); A positioning seat (52) is arranged at one side of the lens bracket (51); The movable seat (55) is fixedly installed at the bottom end of the positioning seat (52), and the mounting seat (56) is fixedly installed at the top end of the sliding seat (4), and the movable seat (55) is slidably installed in the mounting seat (56).

9. A range finder verification device according to claim 8, wherein, Also includes: The axial adjusting screw (57) is rotatably installed in the mounting seat (56), the middle part of the movable seat (55) is provided with a threaded groove matched with the axial adjusting screw (57), and the axial adjusting screw (57) and the threaded groove are used to adjust the position of the movable seat (55) and the detection lens (5) to ensure that the detection lens (5) coincides with the central axis of the range finder main body (12); The adjusting screw grooves (521) are provided with two and are respectively arranged at the opposite corners of the outer side wall of the positioning seat (52); The adjusting screw bolts (53) are provided with two and are respectively installed in the two adjusting screw grooves (521) through threads; The spherical blocks (54) are provided with two and are respectively fixedly installed at one end of the two adjusting screw bolts (53), and the spherical grooves (541) are provided with two and are respectively arranged at the opposite corners of one side of the lens support (51), and the two spherical blocks (54) are respectively arranged in the two spherical grooves (541).

10. A method for calibrating a range finder calibrating device according to any one of claims 1 to 9, wherein the range finder calibrating device is used to calibrate a range finder, characterized in that, Including the following steps: Step one, install the range finder main body (12) on the top end of the range finder support (11), and install the sliding seat (4) and the clamping seat (41) on the top of the sliding rail (2) near the one end of the range finder main body (12); Step two, the second gear (44) moves upward to be close to the first gear (43), the second gear (44) is relatively rotated and dislocated with the first gear (43) under the extrusion of the conical rod (431) and the guide groove (441), and the meshing gap between the first gear (43) and the second gear (44) relative to the rack (3) is eliminated; Step three, when the first gear (43) and the second gear (44) rotate to below the magnetic block (437), the magnetic block (437) exerts a magnetic attraction force on the baffle (436) and moves upward to the inside of the baffle cover (434), and the lubricating oil between the first gear (43) and the second gear (44) is discharged and washed away through the dislocation hole (433); Step four, when the external temperature rises, the expansion body (432) expands downward and drives the second gear (44) to move downward, the distance between the second gear (44) and the first gear (43) increases, the guide groove (441) moves downward along the conical rod (431) driven by the second gear (44), the contact position of the guide groove (441) and the conical rod (431) is reduced in diameter, and the second gear (44) rotates and the overlapping area of the dislocation position of the second gear (44) and the first gear (43) increases; Step five, when the expansion body (432) expands downward and drives the second gear (44) to move downward, the height value of the dislocation hole (433) increases, and when the baffle (436) rotates to below the magnetic block (437), the baffle (436) moves to the inside of the baffle cover (434) under the magnetic attraction force of the magnetic block (437), and the amount of lubricating oil discharged from the dislocation hole (433) increases.

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