A laser measuring instrument

Abstract

The application provides a laser measuring instrument and relates to the technical field of laser measuring instruments.The laser measuring instrument comprises a first worm and a second worm which are limitingly and rotatably connected to a fixing frame, a worm wheel is installed in meshing between the first worm and the second worm, a follow-up rod is coaxially installed on the worm wheel, the follow-up rod is limitingly and rotatably connected to a follow-up frame, a bearing disc is fixedly installed on the follow-up rod in a coaxial manner, and a plurality of fixing holes are formed in the bearing disc.The laser measuring instrument realizes accurate positioning and flexible adjustment of a workpiece in a three-dimensional space through a double-worm cooperative driving mechanism.Traditional measuring equipment usually adopts a single driving mode, and it is difficult to consider both the movement accuracy and the rotation stability, and the device solves this technical problem through cooperation of the first worm and the second worm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser measuring instruments, and more particularly to a laser measuring instrument. BACKGROUND

[0002] Laser thickness measurement technology has become the mainstream solution for thickness detection of industrial products such as metal plates, plastic films, glass substrates, and ceramic sheets due to its non-contact, high precision, and fast response. However, due to the unevenness of material properties, the volatility of production processes, and the influence of environmental factors, single-point measurement often cannot accurately reflect the thickness distribution of the entire workpiece. To ensure the consistency and reliability of product quality, industrial standards generally require multi-position thickness measurement of the measured objects. For large-sized plates or complex-shaped workpieces, a complete thickness distribution map needs to be established. The laser thickness measurement equipment on the market shows limitations when facing this demand. First, existing equipment mostly adopts fixed measurement head design, and the measurement range is strictly limited. For large workpieces that exceed the workbench area of the equipment, manual movement of the workpiece or the use of multiple equipment for cooperative work is often required, which not only increases the operation complexity but also introduces positioning errors and measurement consistency problems. Second, the traditional laser thickness gauge has a single design of the clamping system, mainly targeting standard pieces of specific specifications. When facing workpieces of different thicknesses, different materials, or non-standard sizes, the adaptability of the equipment is insufficient, often resulting in unstable clamping or even inability to clamp, limiting the application range and measurement accuracy of the equipment.

[0003] The traditional plane position adjustment mechanism of the equipment usually adopts a simple manual adjustment method. The operator needs to change the spatial position of the workpiece by rotating the adjustment screw or moving the slider. This adjustment method is not only inefficient but also difficult to ensure accuracy. In actual application, for complex workpieces that require multi-point measurement, the entire adjustment process may take a long time, affecting the overall efficiency of the production line. More seriously, human errors are inevitable during manual adjustment, and such deviations are unacceptable in high-precision measurement. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the problems existing in the prior art, the present application provides a laser measuring instrument to solve the technical problems mentioned in the background.

[0006] (II) Technical solutions

[0007] To achieve the above objectives, the present invention provides the following technical solution: a laser measuring instrument, comprising a fixed frame; and a moving mechanism, the moving mechanism comprising a first worm and a second worm rotatably connected to the fixed frame, a worm wheel meshing between the first worm and the second worm, a follower rod coaxially mounted on the worm wheel, the follower rod rotatably connected to the follower frame, a receiving plate coaxially fixedly mounted on the follower rod, the receiving plate having multiple fixing holes; and a fixing mechanism, the fixing mechanism comprising an insertion sleeve inserted into the fixing holes, multiple expansion springs equally spaced on the side wall of the insertion sleeve, the multiple expansion springs respectively abutting against the fixing holes, a fixing sleeve fixedly mounted on the insertion sleeve, and two inclined grooves formed at 90 degrees on the fixing sleeve, each inclined groove having an inclined pressure block slidably connected to it.

[0008] Preferably, the moving mechanism further includes a first motor and a second motor fixedly mounted on the fixed frame. The extended end of the first motor is connected to the first worm gear, and the extended end of the second motor is connected to the second worm gear. Both the first motor and the second motor are servo motors. This configuration achieves high-precision positioning of the worm gear transmission system through the precise control of the dual servo motors. The closed-loop feedback characteristics of the servo motors ensure that the angle control accuracy reaches ±0.1° and the speed control accuracy reaches ±1rpm, thereby providing a stable and reliable power source for the entire moving mechanism.

[0009] Preferably, the fixed frame is equipped with two guide rods, and the lower end of the follower frame is equipped with two guide sleeves. The guide sleeves are slidably connected to the guide rods. This guiding system effectively eliminates lateral swaying and torsional deformation during the movement through the rigid support structure of the double rod guide, ensuring the high stability and movement accuracy of the bearing platform during longitudinal movement.

[0010] Preferably, the first worm and the second worm are respectively limited and slidably connected to two synchronization plates, and the two synchronization plates are respectively connected between the two guide sleeves. The synchronization plate mechanism forms an integral moving platform by rigidly connecting the two guide sleeves, which effectively disperses the load and eliminates motion errors caused by local deformation.

[0011] Preferably, a plurality of fitting sleeves are installed at equal intervals on the lower end of the receiving plate, and the plurality of fitting sleeves are slidably attached to the follower frame. The fitting sleeve structure transmits the load of the receiving plate evenly to the follower frame through a multi-point evenly distributed support method.

[0012] Preferably, a horizontal frame is mounted on the fixed frame, a horizontal seat is slidably mounted on the horizontal frame, and a rangefinder is fixedly mounted on the horizontal seat. This horizontal measurement system enables the rangefinder to move accurately in the horizontal direction through a precision sliding guide rail.

[0013] Preferably, a transverse motor is fixedly installed on the transverse frame, a belt is clamped onto the extended end of the transverse motor, the other end of the belt is rotatably connected to the fixed frame, and one side of the belt is connected to the transverse seat.

[0014] Preferably, the fixing mechanism further includes two push springs mounted on the inclined pressure block, with the two push springs respectively pressing against the fixing sleeve. The push spring preload system provides a stable initial clamping force to the inclined pressure block through elastic elements, and the pre-compression amount of the push springs is accurately calculated to provide pre-tightening force in the early stage of workpiece clamping.

[0015] Preferably, a telescopic rod is slidably installed inside the fixed sleeve, and a bottom plate is coaxially installed at the lower end of the telescopic rod. The lower ends of the multiple expansion springs are connected to the side wall of the bottom plate. A pull rope is installed on the inclined pressure block. A through hole is opened in the fixed sleeve, and the pull rope is slidably connected in the through hole. The pull rope is connected to the bottom plate. This pull rope transmission mechanism achieves precise synchronization between the contraction action of the inclined pressure block and the contraction action of the expansion springs through a flexible connection.

[0016] Preferably, a handle is installed at the upper end of the fixed sleeve, and a push plate is installed at the upper end of the telescopic rod. The human-machine interface achieves an ergonomic operation mode through the coordinated design of the handle and the push plate. The optimized design ensures comfortable operation, and the operator can complete complex unlocking operations through natural gripping motions.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a laser measuring instrument with the following advantages:

[0019] This laser measuring instrument achieves precise positioning and flexible adjustment of workpieces in three-dimensional space through a dual worm gear cooperative drive mechanism. Traditional measuring equipment usually uses a single drive method, which makes it difficult to balance movement accuracy and rotational stability. This device solves this technical problem by coordinating the first and second worm gears. When the two servo motors rotate in opposite directions at the same speed, the worm wheel will produce a longitudinal translational motion without rotation due to the reverse thread design of the worm gear, achieving pure linear movement. When the two motors rotate in the same direction and at the same speed, the worm wheel will produce a pure rotational motion without longitudinal displacement. The ingenuity of this design lies in motion decoupling, which makes longitudinal movement and rotational movement completely independent, avoiding the motion interference problem common in traditional mechanical transmissions, and far exceeding the accuracy level of traditional manual adjustment equipment.

[0020] By using multiple fixing holes on the receiving plate in conjunction with pluggable fixing components, rapid adaptation to workpieces of different sizes is achieved. This design completely changes the limitation of traditional measuring equipment being "one machine for one use," enabling a single device to handle various measurement needs, from small precision parts to large plates. The equidistant distribution of fixing holes has been carefully calculated to cover common workpiece sizes on the market, while the pluggable design of the insert sleeve makes changing the fixing position extremely convenient. Operators can adjust the clamping position without using any tools. More importantly, each fixing component adopts an independent clamping mechanism, providing vertical positioning force through an expansion spring and horizontal clamping force through a wedge pressure block. This combination of bidirectional forces ensures the absolute stability of the workpiece during the measurement process. This modular design also provides users with great expandability, allowing for the customization of special fixtures according to specific needs to meet the measurement requirements of various non-standard workpieces.

[0021] Through the above technological innovations, this laser measuring instrument solves the key problems of traditional measuring equipment in terms of adaptability, accuracy, efficiency and ease of operation, and improves performance in terms of measurement accuracy, expands the scope of application, simplifies the operation process and reduces the cost of use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a laser measuring instrument according to the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the receiving plate and guide rod in this invention;

[0024] Figure 3 This is an exploded cross-sectional view of the receiving plate and the follower frame in this invention;

[0025] Figure 4 This is a schematic diagram of the structure of the first worm, the second worm, and the turbine in this invention;

[0026] Figure 5 This is a cross-sectional view of the follower frame in this invention;

[0027] Figure 6 This is a schematic diagram of the structure of the fixing sleeve and the insertion sleeve in this invention;

[0028] Figure 7 This is a cross-sectional view of the fixing sleeve and telescopic rod in this invention;

[0029] Figure 8 This is a cross-sectional view of the fixing sleeve in this invention;

[0030] Figure 9 This is a schematic diagram of the telescopic rod and inclined pressure block in this invention.

[0031] In the diagram: 11. Fixed frame; 21. First worm gear; 22. Second worm gear; 23. Worm wheel; 24. Follower rod; 25. Follower frame; 26. Receiving plate; 27. Fixed hole; 28. First motor; 29. ​​Second motor; 31. Insertion sleeve; 32. Expansion spring; 33. Fixed sleeve; 34. Inclined groove; 35. Inclined pressure block; 36. Push spring; 37. Telescopic rod; 38. Bottom plate; 39. Pull rope; 210. Guide rod; 211. Guide sleeve; 212. Synchronization plate; 213. Fitting sleeve; 214. Transverse frame; 215. Transverse seat; 216. Rangefinder; 217. Transverse motor; 218. Belt; 310. Through hole; 311. Handle; 312. Push plate. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0035] Please see Figures 1 to 9A laser measuring instrument includes a fixed frame 11 and a moving mechanism. The moving mechanism includes a first worm 21 and a second worm 22 rotatably connected to the fixed frame 11. A worm wheel 23 is meshed between the first worm 21 and the second worm 22. A follower rod 24 is coaxially mounted on the worm wheel 23 and rotatably connected to a follower frame 25. A receiving plate 26 is coaxially fixedly mounted on the follower rod 24. The receiving plate 26 has multiple fixing holes 27. The moving mechanism also includes a first motor 28 and a second motor 29 fixedly mounted on the fixed frame 11. The extended end of the first motor 28 is connected to the first worm 21, and the extended end of the second motor 29 is connected to the second worm 22. Both the first motor 28 and the second motor 29 are servo motors. Two guide rods 210 are mounted on the fixed frame 11. Two guide sleeves 211 are installed at the lower end of the follower frame 25. The guide sleeves 211 are slidably connected to the guide rod 210. The first worm 21 and the second worm 22 are respectively limited and slidably connected to two synchronous plates 212. The two synchronous plates 212 are respectively connected between the two guide sleeves 211. Multiple fitting sleeves 213 are installed at equal intervals at the lower end of the receiving plate 26. The multiple fitting sleeves 213 are slidably fitted onto the follower frame 25. A transverse frame 214 is installed on the fixed frame 11. A transverse seat 215 is slidably installed on the transverse frame 214. A rangefinder 216 is fixedly installed on the transverse seat 215. A transverse motor 217 is fixedly installed on the transverse frame 214. A belt 218 is pinched and installed on the extended end of the transverse motor 217. The other end of the belt 218 is rotatably connected to the fixed frame 11. One side of the belt 218 is connected to the transverse seat 215.

[0036] When measuring the thickness of the item to be tested, the item is first placed on the receiving plate 26 and fixed by multiple inclined pressure blocks 35. Then, during the measurement process, the laser emitted by the rangefinder 216 measures multiple distances on the upper surface of the item. Since the distance from the receiving plate 26 to the rangefinder 216 is known, the thickness distribution of the item can be obtained by subtracting the multiple data measured by the item.

[0037] When measuring thickness distribution, it is necessary to move the object longitudinally and laterally, and sometimes rotate it. Lateral movement is required; the lateral motor 217 drives the belt 218 to rotate, causing the lateral seat 215 to slide on the lateral frame 214. Longitudinal movement is required because the first worm 21 and the second worm 22 are connected to the worm wheel 23 by reverse threads. Therefore, the first motor 28 and the second motor 29 only need to rotate in opposite directions at the same speed to move the worm wheel 23 longitudinally. Since both the first motor 28 and the second motor 29 are... The servo motor control allows for precise control of the rotation of both motors. The follower rod 24 on the worm gear 23 is connected to the follower frame 25 for rotation limit, and the guide sleeve 211 is mounted on the follower frame 25. As the worm gear 23 moves, it drives the guide sleeve 211 to slide on the guide rod 210, thus completing the longitudinal movement process. When rotation is required, it is only necessary to control the first motor 28 and the second motor 29 to rotate in the same direction and at the same speed. Since the first worm 21 and the second worm 22 are respectively connected to the worm gear 23 by reverse threads, they will drive the worm gear 23 to rotate, thus completing the rotation process.

[0038] The fixing mechanism includes an insertion sleeve 31 inserted into a fixing hole 27. Multiple expansion springs 32 are evenly spaced on the side wall of the insertion sleeve 31, and each expansion spring 32 abuts against the fixing hole 27. A fixing sleeve 33 is fixedly installed on the insertion sleeve 31. Two inclined grooves 34 are formed at 90 degrees on the fixing sleeve 33, and each inclined groove 34 has a slidingly connected inclined pressure block 35. The fixing mechanism also includes two push springs 36 installed on the inclined pressure block 35, with each push spring 36 pressing against the fixing hole 27. On the sleeve 33, a telescopic rod 37 is slidably installed inside the fixed sleeve 33. A bottom plate 38 is coaxially installed at the lower end of the telescopic rod 37. The lower ends of multiple expansion springs 32 are connected to the side wall of the bottom plate 38. A pull rope 39 is installed on the inclined pressure block 35. A through hole 310 is opened in the fixed sleeve 33. The pull rope 39 is slidably connected in the through hole 310 and connected to the bottom plate 38. A handle 311 is installed at the upper end of the fixed sleeve 33. A push plate 312 is installed at the upper end of the telescopic rod 37.

[0039] When it is necessary to fix the item to be tested, first place the item on the receiving plate 26. According to the size of the item to be tested, insert the insertion sleeve 31 into the corresponding fixing hole 27, and make the two inclined pressure blocks 35 abut against the side wall of the item to be tested. At this time, the operator holds the handle 311 and pushes it down. Since the diameter of the multiple expansion springs 32 is larger than the diameter of the fixing hole 27, the inward push will generate a corresponding frictional force to provide vertical fixation. The two inclined pressure blocks 35 are respectively attached to the side wall of the item to be tested. As the insertion sleeve 31 continues to be pushed down, the inclined pressure block 35 and the item to be tested will generate an initial frictional force under the action of the push spring 36. As it continues to be pushed down, the inclined pressure block 35 will slide in the inclined groove 34 and generate an outward extension tendency. Then, the inclined pressure block 35 will have both downward pressure and lateral pushing force to generate frictional force. At this time, the item to be tested is fixed, and the fixing is very convenient. Just select the corresponding fixing hole 27 and insert the insertion sleeve 31 inward to complete the fixing.

[0040] When it is necessary to untie, the operator places their palm on the push plate 312 and all their fingers on the handle 311, bringing the two closer together. As the push plate 312 is pushed downward, it will cause the pull rope 39 to move downward, thus causing the inclined pressure block 35 to retract and untie along the inclined groove 34 and fix the corresponding item. While pushing downward, since the upper end of the expansion spring 32 is connected to the fixing sleeve 33 and the lower end of the expansion spring 32 is connected to the bottom plate 38, the expansion spring 32 will be stretched, thereby retracting and untying the connection between it and the fixing hole 27. At this time, the entire untying process is completed. Pulling upward will complete the untying process.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser measuring instrument, comprising a fixed frame (11) and a moving mechanism, the moving mechanism comprising a first worm (21) and a second worm (22) rotatably connected to the fixed frame (11), a worm wheel (23) meshing between the first worm (21) and the second worm (22), a follower rod (24) coaxially mounted on the worm wheel (23), the follower rod (24) rotatably connected to a follower frame (25), and a receiving plate (26) coaxially fixedly mounted on the follower rod (24). 26) The upper part has multiple fixing holes (27); it also includes a fixing mechanism, the fixing mechanism including an insertion sleeve (31) inserted into the fixing hole (27), multiple expansion springs (32) are installed at equal intervals on the side wall of the insertion sleeve (31), the multiple expansion springs (32) respectively abut against the fixing hole (27), a fixing sleeve (33) is fixedly installed on the insertion sleeve (31), the fixing sleeve (33) has two inclined grooves (34) at 90 degrees, and an inclined pressure block (35) is slidably connected in each of the inclined grooves (34); its characteristic is: The fixing mechanism also includes two push springs (36) installed on the inclined pressure block (35). The two push springs (36) are respectively abutted on the fixing sleeve (33). A telescopic rod (37) is slidably installed in the fixing sleeve (33). A bottom plate (38) is coaxially installed at the lower end of the telescopic rod (37). The lower ends of multiple expansion springs (32) are connected to the side wall of the bottom plate (38). A pull rope (39) is installed on the inclined pressure block (35). A through hole (310) is opened in the fixing sleeve (33). The pull rope (39) is slidably connected in the through hole (310). The pull rope (39) is connected to the bottom plate (38). A handle (311) is installed at the upper end of the fixing sleeve (33). A push plate (312) is installed at the upper end of the telescopic rod (37).

2. The laser measuring instrument according to claim 1, characterized in that: The moving mechanism also includes a first motor (28) and a second motor (29) fixedly mounted on the fixed frame (11). The extended end of the first motor (28) is connected to the first worm gear (21), and the extended end of the second motor (29) is connected to the second worm gear (22). Both the first motor (28) and the second motor (29) are servo motors.

3. The laser measuring instrument according to claim 1, characterized in that: Two guide rods (210) are installed on the fixed frame (11), and two guide sleeves (211) are installed at the lower end of the follower frame (25). The guide sleeves (211) are slidably connected to the guide rods (210).

4. A laser measuring instrument according to claim 3, characterized in that: The first worm (21) and the second worm (22) are respectively limited and slidably connected to two synchronization plates (212), and the two synchronization plates (212) are respectively connected between the two guide sleeves (211).

5. A laser measuring instrument according to claim 1, characterized in that: Multiple fitting sleeves (213) are installed at equal intervals at the lower end of the receiving plate (26), and the multiple fitting sleeves (213) slide and fit onto the follower frame (25) respectively.

6. A laser measuring instrument according to claim 1, characterized in that: A horizontal frame (214) is installed on the fixed frame (11), a horizontal seat (215) is slidably installed on the horizontal frame (214), and a rangefinder (216) is fixedly installed on the horizontal seat (215).

7. A laser measuring instrument according to claim 6, characterized in that: A transverse motor (217) is fixedly installed on the transverse frame (214). A belt (218) is attached to the extended end of the transverse motor (217). The other end of the belt (218) is rotatably connected to the fixed frame (11). One side of the belt (218) is connected to the transverse seat (215).

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