A laser measuring instrument for detecting flatness of motor parts

Abstract

The application relates to the technical field of measuring instruments, in particular to a laser measuring instrument for detecting the flatness of motor parts. The laser measuring instrument comprises a magnetic clamping table driven by a motor, and further comprises a detection frame, a detection rod slidingly installed on the detection frame and a laser scanner fixedly installed on the detection frame, universal steel balls embedded at the bottom end of the detection rod, a measuring shaft rotatably installed on the detection frame, a driving wheel, a first rotating wheel and a second rotating wheel respectively installed on the measuring shaft, the driving wheel being in friction transmission with the detection rod, a laser distance measuring probe fixedly installed on the detection frame and arranged opposite to the detection rod, a marking frame, a pen holder, an ink holder and a trigger plate, the pen holder being in friction transmission with the first rotating wheel, and the marking frame being in friction transmission with the second rotating wheel. The laser measuring instrument has the beneficial effect that, aiming at the problem of poor synchronism between laser sampling and part movement in the existing laser detection equipment, which leads to trajectory distortion, the laser measuring instrument realizes high-precision synchronous linkage of measurement and recording.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring instruments, in particular to a laser measuring instrument for detecting the flatness of motor parts. BACKGROUND

[0002] In the field of motor manufacturing, the flatness of parts is a key indicator that affects the running accuracy, energy consumption level and service life of the motor, especially the core parts such as motor shaft and end cover. If the surface flatness deviation exceeds the allowed range, it may cause uneven assembly gap, increased running vibration, accelerated local wear and tear, and even equipment failure in severe cases. Therefore, high-precision flatness detection of motor parts is a core link to ensure the quality of motor products.

[0003] Currently, the flatness detection of motor parts mainly relies on two types of technical solutions: traditional manual measurement and conventional laser detection. However, both have significant limitations. In traditional manual detection, contact gauges such as dial gauges and micrometers are used for sampling detection. This not only has low detection efficiency and is difficult to meet the full detection needs of large-scale production, but also introduces subjective errors due to differences in force and angle during manual operation. In conventional laser detection equipment, although non-contact measurement has been achieved, there are still technical shortcomings:

[0004] Firstly, most laser equipment can only output electronic data or abstract waveform graphs, lacking intuitive physical track records. Operators need to rely on professional software to interpret data, which is insufficient for immediate judgment in production sites.

[0005] Secondly, the synchronization between the laser measurement system and the movement of the parts is poor. When the parts rotate or move, the actions of the laser sampling and recording device are not synchronized, which can easily lead to distorted tracks and affect detection accuracy.

[0006] Thirdly, the mechanical transmission structure of existing equipment is simple, and the sensitivity to small fluctuations on the surface of the parts is low. It is difficult to effectively amplify and visualize micron-level deviations, and small defects are easily missed.

[0007] Fourthly, the detection results rely on electronic storage, and there is a lack of physical solidification records. In harsh production environments such as high temperatures and oil pollution, electronic data is easily lost or damaged, making it inconvenient for long-term quality tracing.

[0008] Therefore, the present application provides a laser measuring instrument for detecting the flatness of motor parts to solve the problems raised in the background technology. SUMMARY

[0009] The present application addresses the problem of poor synchronization between laser sampling and part movement in existing laser detection equipment, which leads to distorted tracks. The present application achieves high-precision synchronous linkage of measurement and recording.

[0010] The technical scheme for solving the above technical problems of the present application is as follows: a laser measuring instrument for detecting flatness of motor parts, comprising a magnetic clamp table driven by a motor, and further comprising:

[0011] a detection frame, a detection rod being slidably installed on the detection frame and a laser scanner being fixedly installed on the detection frame and arranged in parallel with the detection rod, universal steel balls being embedded at the bottom end of the detection rod, a measuring shaft being rotatably installed on the detection frame, a driving wheel, a first rotating wheel and a second rotating wheel being respectively installed on the measuring shaft, the driving wheel being in friction transmission with the detection rod, a laser ranging probe being fixedly installed on the detection frame and arranged opposite to the detection rod;

[0012] a marker frame, a pen frame, an ink frame and a trigger plate, the pen frame being in friction transmission with the first rotating wheel, the marker frame being in friction transmission with the second rotating wheel, a group of first spring return members being installed between the pen frame and the detection frame, a group of return springs being installed on the bottom surface of the marker frame and limited by the detection frame, a recording pen being installed on the pen frame, a pressure touch rod being screw-installed at the bottom of the marker frame, a group of second spring return members being installed between the trigger plate and the ink frame and limited by the detection frame, the ink frame being slidably connected with the detection rod and the bottom surface of the ink frame being provided with an ink ring coaxially arranged with the detection rod;

[0013] a transmission system, the transmission system being linked with the magnetic clamp table, a drawing paper and a copying table being drivingly installed on the transmission system and moving at the same speed as the magnetic clamp table, a copying disc being magnetically attracted on the copying table, a marking rod being slidably connected on the marker frame and matched with the copying disc, a counterweight being installed on the top of the marking rod and the detection rod.

[0014] The present application has the following advantages:

[0015] 1. In view of the problem of poor synchronization between laser sampling and part movement in the existing laser detection equipment, which leads to trajectory distortion, the present application realizes high-precision synchronous linkage of measurement and recording. When working, the present application constructs a full-process synchronous mechanism through a multi-stage mechanical linkage structure. The transmission system adopts orthogonal meshing design of the first bevel gear and the second bevel gear to accurately transmit the rotary motion of the magnetic clamp table to the bottom shaft and the belt pulley. Then, through the tension pulley and the synchronous toothed belt, the drawing paper transmission roller is driven, so that the synchronization error between the moving speed of the drawing paper and the rotating speed of the magnetic clamp table is minimized. At the same time, the fixed shaft and the regular hexagonal sliding groove movable shaft structure linked by the third bevel gear ensure that the copying table rotates synchronously with the part movement, realizing the full-chain action cooperation of part rotation, laser measurement, trajectory recording and physical copying. This mechanical hard linkage replaces the traditional electronic synchronous control, eliminates system delay, solves the problem of trajectory distortion caused by the asynchronization between part movement and recording device, and significantly improves the synchronization accuracy compared with the existing equipment.

[0016] 2. In view of the low sensitivity of existing equipment to micron-level surface undulations and the easy omission of minor defects, the present application innovatively designs a 20-fold mechanical amplification transmission structure. By setting the radii of the first and second rotating wheels to be 20 times that of the driving wheel, when the universal steel ball at the bottom of the detection rod produces a slight displacement due to uneven parts, the driving wheel drives the quantity shaft to rotate through friction transmission, and after amplification by the rotating wheel, it drives the pen holder and marking frame to produce a significant displacement. The micron-level undulations of the detection rod are mechanically amplified, and the recording pen can form a clear track on the drawing paper. The diamond carving head leaves a permanent physical mark on the modified thermoplastic polyurethane disc, realizing the conversion from invisible deviation to intuitive readable track. This mechanical and laser cooperative amplification mode improves the sensitivity of capturing minor defects compared to the electronic data output mode of conventional laser equipment, effectively avoiding the omission of minor flatness deviations.

[0017] 3. In view of the defects of existing equipment relying on electronic storage and data loss in high-temperature oil environment, the present application constructs a multi-element tracing system with dual physical recording and electronic backup. On the one hand, the drawing paper is drawn continuously by the recording pen in real time, directly presenting the surface undulation characteristics of the part, which can be quickly judged without professional software. On the other hand, the modified thermoplastic polyurethane disc of the copying table is carved by the diamond carving rod to form a three-dimensional physical mark. Its wear-resistant and corrosion-resistant properties ensure that the record can be saved for a long time, and it can be reused through a thermal reshaping process. At the same time, the electronic data collected by the laser scanner and the ranging probe are transmitted to the microcontroller for backup simultaneously, realizing mutual verification of physical recording and electronic data. This system significantly improves the tracing reliability in harsh production environments compared to the traditional single electronic storage mode, meeting the long-term quality tracing needs.

[0018] 4. Compared to the low efficiency and large subjective error of traditional manual contact detection, the present application realizes full-process low-intervention detection through automatic structure design. The symmetrical guide grooves of the detection rod and the carving rod are combined with the counterweight block to ensure that only axial displacement occurs during detection, avoiding radial shaking interference. The first and second spring return members realize automatic and accurate resetting of the pen holder and ink holder through the cooperative action of the guide rod and the return spring, eliminating the repeated errors caused by the lag of moving parts. The parallel arrangement of the air pump and the air cleaning nozzle can quickly remove dust and oil on the surface of the part before detection, avoiding the influence of impurities on the accuracy of laser measurement. The combination of the laser scanner and the microcontroller realizes automatic data collection and analysis, which improves the efficiency of manual sampling detection by tens of times and completely eliminates the subjective errors introduced by manual operation force and angle differences.

[0019] On the basis of the above technical scheme, the present application can also be improved as follows.

[0020] As the preferred technical scheme of the present application, the rack is further provided with a microcontroller, data terminals of the laser scanner and the laser ranging probe are connected with the microcontroller, the rack is provided with a vertically arranged screw lifting module, a lifting frame is drivenly arranged on the screw lifting module, an axial driving module is arranged on the lifting frame and connected with the detection frame, and the magnetic clamp table is magnetically attracted to the motor shaft to be measured.

[0021] As the preferred technical scheme of the present application, the first spring return member and the second spring return member each include a guide rod and a return spring sleeved on the guide rod, the guide rod in the first spring return member is fixed on the pen holder and slidably connected with the detection frame, the return spring in the first spring return member is arranged between the pen holder and the detection frame, and the guide rod in the second spring return member is slidably connected with the ink holder and the trigger plate at two ends thereof, and the return spring in the second spring return member is arranged between the trigger plate and the detection frame.

[0022] As the preferred technical scheme of the present application, the transmission system includes a bottom shaft and a belt pulley rotatably connected with the rack, first bevel gears are arranged on the bottom shaft and the magnetic clamp table, the two first bevel gears are orthogonally engaged, second bevel gears are arranged on the belt pulley and the bottom shaft, the two second bevel gears are orthogonally engaged, a tensioning block is slidably arranged on the lifting frame, a tensioning spring is arranged on the side surface of the tensioning block and limited by the lifting frame, a tensioning wheel is rotatably arranged on the tensioning block, a first synchronous toothed belt is drivenly arranged on the tensioning wheel, two transmission rollers are rotatably arranged on the detection frame, one of the transmission rollers and the belt pulley are drivingly connected with the first synchronous toothed belt, and the two transmission rollers are linked through a second synchronous toothed belt, and the axis of the recording pen is perpendicular to the axis of the transmission roller.

[0023] As the preferred technical scheme of the present application, the rack is further provided with a fixed shaft rotatably connected with the rack, third bevel gears are arranged on the fixed shaft and the bottom shaft, the two third bevel gears are orthogonally engaged, a movable shaft is rotatably arranged on the lifting frame, a sliding groove is formed in the inside of the fixed shaft and slidably connected with the movable shaft, the sliding groove and the movable shaft are both hexagonal in cross section, and the top end of the movable shaft is fixedly connected with the copying table.

[0024] As the preferred technical scheme of the present application, two symmetrical guide grooves are arranged on the marking frame and the detection frame, two symmetrical guide blocks are arranged on the detection rod and the marking rod and slidably connected with the guide grooves, the dial plate is made of modified thermoplastic polyurethane composite material, and a diamond carving head is arranged at the bottom end of the marking rod.

[0025] As the preferred technical scheme of the present application, the scale disc is fixedly installed on the detection frame, and the scale shaft is rotatably installed on the scale disc, the scale bar and the driven wheel are fixedly installed on the scale shaft, the driven wheel is in friction transmission with the pen holder, and the scale disc is provided with a scale mark.

[0026] As the preferred technical scheme of the present application, the radius of the driven wheel is the same as that of the driving wheel, the radius of the first rotating wheel is the same as that of the second rotating wheel, the radius of the first rotating wheel is 20 times of the radius of the driving wheel, and the friction lines are arranged on the driving wheel, the driven wheel, the first rotating wheel, the second rotating wheel, the marking frame and the pen holder.

[0027] As the preferred technical scheme of the present application, the air pump and the air cleaning nozzle are installed on the detection frame, the air cleaning nozzle is arranged in parallel with the laser ranging probe, and the air outlet port of the air pump is fixedly communicated with the air cleaning nozzle. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0029] Figure 2 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts. Figure 1 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0030] Figure 3 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0031] Figure 4 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0032] Figure 5 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0033] Figure 6 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts. Figure 5 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0034] Figure 7 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0035] Figure 8 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts. Figure 7 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0036] Figure 9 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0037] Figure 10 It is a schematic diagram of the overall structure of the laser measuring instrument for detecting the flatness of motor parts.

[0038] In the drawings, the components represented by each reference numeral are listed as follows:

[0039] 1. Frame; 2. Motor; 3. Magnetic clamp; 4. Inspection frame; 5. Inspection rod; 6. Laser scanner; 7. Universal ball bearing; 8. Measuring shaft; 9. Drive wheel; 10. First rotary wheel; 11. Second rotary wheel; 12. Laser rangefinder probe; 13. Marker holder; 14. Pen holder; 15. Ink holder; 16. Trigger plate; 17. First spring return element; 18. Return spring; 19. Recording pen; 20. Contact rod; 21. Second spring return element; 22. Ink ring; 23. Drawing paper; 24. 1. Copying table; 25. Engraving disc; 26. Engraving rod; 27. Counterweight; 28. Microcontroller; 29. ​​Screw lifting module; 30. Lifting frame; 31. Axial drive module; 32. Bottom shaft; 33. Pulley; 34. Tensioning block; 35. Tensioning spring; 36. Tensioning wheel; 37. Transmission roller; 38. Fixed shaft; 39. Movable shaft; 40. Scale dial; 41. Scale shaft; 42. Marker; 43. Driven wheel; 44. Air pump; 45. Air purification nozzle; 46. Shaft of the motor under test. Detailed Implementation

[0040] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0041] The present invention provides the following preferred embodiments.

[0042] like Figures 1-10 As shown, a laser measuring instrument for detecting the flatness of motor parts includes a magnetic clamping platform 3 driven by a motor 2, a frame 1 on which a microcontroller 28 is mounted, and a motor shaft 46 to be tested magnetically attached to the magnetic clamping platform 3. The instrument also includes:

[0043] Inspection frame 4, the frame 1 is equipped with a vertically arranged screw lifting module 29, the screw lifting module 29 is driven to install a lifting frame 30, the lifting frame 30 is installed to install an axial drive module 31, and the axial drive module 31 is driven to connect with the inspection frame 4.

[0044] A detection rod 5 is slidably mounted on the detection frame 4 and a laser scanner 6 is fixedly mounted parallel to the detection rod 5. A universal steel ball 7 is embedded at the bottom end of the detection rod 5. A measuring shaft 8 is rotatably mounted on the detection frame 4. A drive wheel 9, a first rotating wheel 10 and a second rotating wheel 11 are respectively mounted on the measuring shaft 8.

[0045] The drive wheel 9 is driven by friction with the detection rod 5, and a laser rangefinder 12 is fixedly installed on the detection frame 4, facing the detection rod 5.

[0046] The data terminals of both the laser scanner 6 and the laser rangefinder 12 are connected to the microcontroller 28.

[0047] The laser ranging probe 12 is positioned directly above the measuring rod 5;

[0048] The marking frame 13, the pen frame 14, the ink frame 15 and the trigger plate 16, the pen frame 14 is frictionally driven with the first rotating wheel 10, and the marking frame 13 is frictionally driven with the second rotating wheel 11;

[0049] The radii of the first rotating wheel 10 and the second rotating wheel 11 are the same, and the radius of the first rotating wheel 10 is 20 times the radius of the driving wheel 9;

[0050] By setting the radii of the first rotating wheel 10 and the second rotating wheel 11 to the same size and setting the radii to be 20 times the radius of the driving wheel 9, a high-precision mechanical amplification transmission structure is formed. In the process of detecting the flatness of motor parts, when the universal steel ball 7 at the bottom end of the detection rod 5 produces a slight displacement due to the unevenness of the surface of the part, the driving wheel 9 drives the quantity shaft 8 to rotate through frictional transmission, and the first rotating wheel 10 and the second rotating wheel 11 rotate synchronously and drive the pen frame 14 and the marking frame 13 to move, respectively;

[0051] Since the radius of the first rotating wheel 10 is 20 times the radius of the driving wheel 9, the slight displacement of the detection rod 5 can drive the recording pen 19 to form a clear and identifiable track on the drawing paper 23 after amplification transmission, and at the same time, the marking frame 13 drives the marking rod 26 to complete high-precision engraving on the engraving disc 25. This design solves the technical problems of traditional laser measuring instruments that are not sensitive to slight flatness errors and that manual recording is prone to visual errors, and realizes the visual recording and physical replication of the micron-level flatness deviation of the shaft parts of the motor 2;

[0052] Compared with the single mode of relying on electronic data storage in the prior art, the scheme improves the intuitiveness and traceability of the detection results through mechanical amplification and synchronous recording mechanism;

[0053] The laser ranging probe 12 adopts the laser triangulation reflection principle, and the laser emitting end is coaxially arranged with the central axis of the detection rod 5, and the receiving end converts the mechanical displacement into an electrical signal by capturing the spot offset of the reflected laser and transmits it to the microcontroller 28;

[0054] The laser scanner 6 is based on line laser scanning technology, emits a visible laser beam with a wavelength of 650nm, and cooperates with a CMOS image sensor to realize two-dimensional contour scanning of a circular area with a diameter of 50-200mm, with a horizontal resolution of 0.01mm, and can generate three-dimensional point cloud data of the surface of the part;

[0055] When working, first, the microcontroller 28 drives the screw lifting module 29 to adjust the height of the detection frame 4, so that the universal steel ball 7 at the bottom end of the detection rod 5 contacts the surface of the part, the laser ranging probe 12 emits an initial laser beam to record the zero position height, and the laser scanner 6 completes pre-scanning through the axial driving module 31 and generates an initial contour baseline which is stored in the system memory;

[0056] Then the motor 2 drives the magnetic clamp table 3 to rotate the part, and in the process, the detection rod 5 generates axial displacement with the surface undulation, the laser ranging probe 12 captures displacement data at a sampling frequency of 1 kHz, calculates real-time height deviation, and transmits it to the microcontroller 28;

[0057] A set of first spring return members 17 are installed between the pen holder 14 and the detection frame 4, a set of return springs 18 are installed on the bottom surface of the marker holder 13 and are limited by the detection frame 4, a recording pen 19 is installed on the pen holder 14, a pressure touch rod 20 is screw-mounted on the bottom of the marker holder 13, and a set of second spring return members 21 are installed between the trigger plate 16 and the ink holder 15 and are limited by the detection frame 4;

[0058] The trigger plate 16 is arranged directly below the pressure touch rod 20;

[0059] The threaded connection structure of the pressure touch rod 20 and the marker holder 13 can adjust the trigger threshold of the pressure touch rod 20 to the trigger plate 16;

[0060] The ink holder 15 is slidingly connected with the detection rod 5, and the bottom surface of the ink holder 15 is provided with an ink ring 22 coaxially arranged with the detection rod 5;

[0061] The first spring return member 17 and the second spring return member 21 each include a guide rod and a return spring sleeved on the guide rod, the guide rod in the first spring return member 17 is fixed on the pen holder 14 and is slidingly connected with the detection frame 4, the return spring in the first spring return member 17 is arranged between the pen holder 14 and the detection frame 4, the guide rod in the second spring return member 21 has two ends slidingly connected with the ink holder 15 and the trigger plate 16 respectively, and the return spring in the second spring return member 21 is arranged between the trigger plate 16 and the detection frame 4;

[0062] The first spring return member 17 and the second spring return member 21 realize automatic return and accurate guidance of the pen holder 14 and the ink holder 15 in the detection process through the combined structure of the guide rod and the return spring, when the detection rod 5 drives the driving wheel 9 to rotate due to the surface undulation of the part, the pen holder 14 slides along the detection frame 4 through the guide rod of the first spring return member 17, and the recording pen 19 completes trajectory drawing on the drawing paper 23;

[0063] After the detection is completed, the elastic potential energy of the return spring drives the pen holder 14 to return, so as to avoid residual trajectory interference on subsequent detection, and similarly, the ink holder 15 moves synchronously with the detection rod 5 only when the trigger plate 16 is triggered by the pressure touch rod 20, and forms a ring-shaped mark through the ink ring 22 on the outer periphery of the detection rod 5, and quickly returns after the marking is completed, which solves the repeated detection error problem caused by the reset lag of the moving part and the guiding deviation in the existing equipment, and through the cooperative action of the spring return and the rigid guidance, the movement accuracy of the recording pen 19 and the ink ring 22 is ensured;

[0064] A transmission system is connected with the magnetic clamp table 3, and a drawing paper 23 and a copying table 24 are installed on the transmission system and move at the same speed as the magnetic clamp table 3. The copying table 24 is magnetically attracted to a marking disc 25, and a marking frame 13 is slidably connected to a marking rod 26 matched with the marking disc 25. The top of the marking rod 26 and the detection rod 5 are both installed with a counterweight 27.

[0065] The counterweight 27 provides constant contact pressure for the marking rod 26 and the detection rod 5.

[0066] The magnetic attraction force between the copying table 24 and the marking disc 25 is greater than the resistance of the marking rod 26 to the marking disc 25.

[0067] The marking frame 13 and the detection frame 4 are both provided with two symmetrically arranged guide grooves, and the detection rod 5 and the marking rod 26 are both installed with two symmetrically arranged guide blocks slidably connected with the guide grooves. The marking disc 25 is made of modified thermoplastic polyurethane composite material, and the bottom end of the marking rod 26 is installed with a diamond carving head.

[0068] The surface hardness of the marking disc 25 is 85D-95D of Shore hardness.

[0069] The symmetric guide grooves of the marking frame 13 and the detection frame 4, combined with the guide blocks on the detection rod 5 and the marking rod 26, form a bidirectional constraint sliding guide mechanism, which ensures that the detection rod 5 only produces axial displacement when following the ups and downs of the surface of the part, avoiding radial shaking. The marking disc 25 is made of modified thermoplastic polyurethane composite material, combined with the diamond carving head at the bottom end of the marking rod 26, which realizes the physical solidification recording of the flatness deviation.

[0070] In the working process, when the marking frame 13 is driven to move downward by the second rotating wheel 11, the marking rod 26 carves a three-dimensional trajectory on the marking disc 25 following the surface profile of the part under the action of the counterweight 27. The high wear resistance of the modified thermoplastic polyurethane material and the high hardness characteristics of the diamond carving head ensure the clarity and durability of the carved trajectory. This scheme solves the problems of easy wear of paper records and easy loss of electronic data in traditional detection. Through the combination of physical copying and guide constraint, the detection results can be stored for a long time and have strong anti-interference ability, especially suitable for the quality traceability demand of motor parts in high temperature, oil pollution and other harsh production environments.

[0071] When it is necessary to realize the regeneration and reuse of the marking disc 25, first, the surface is cleaned, and isopropanol or anhydrous ethanol is used to wipe along the radial direction with a dust-free cloth. Then, heat remodeling regeneration is performed. The cleaned marking disc 25 is placed on an 80-100℃ constant temperature heating platform for 15-20 minutes. After the carving marks are flattened, the temperature is slowly reduced to room temperature at a rate of ≤5℃ / min. Then, 8000 mesh metallographic sandpaper is used for dry grinding to a roughness Ra≤0.02μm, and verified by a laser flatness detector. When reused, the service life needs to be evaluated, and when the cumulative wear reaches 15% of the initial thickness, the regeneration is stopped.

[0072] When it is necessary to realize the reading of the recorded data on the disc 25, the disc 25 is fixed on a high-precision image measuring instrument, a blue light scanning module with a precision of 0.001 mm is used to scan to obtain three-dimensional point cloud data at a resolution of 500 dpi and a speed of 30 mm / s, a special software is used to fit a curved surface model and generate a deviation chromatogram, and a flatness error and uneven area coordinates are output;

[0073] Further comprising a scale disc 40 fixedly installed on the detection frame 4 and a scale shaft 41 rotatably installed on the scale disc 40, the scale shaft 41 is fixedly installed with a scale rod 42 and a driven wheel 43, the driven wheel 43 is in friction transmission with the pen frame 14, and the scale disc 40 is provided with scale marks;

[0074] The scale marks of the scale disc 40 have a range of ±1 mm and a graduation value of 0.01 mm;

[0075] The driven wheel 43 has the same radius as the driving wheel 9, and the driving wheel 9, the driven wheel 43, the first rotating wheel 10, the second rotating wheel 11, the marker frame 13 and the pen frame 14 are all provided with friction lines;

[0076] The friction lines are cross-net-shaped knurls with a friction coefficient of ≥0.35;

[0077] Through the equal-radius design of the driven wheel 43 and the driving wheel 9 and the linkage structure of the scale shaft 41, the scale rod 42 and the scale disc 40, a displacement quantization feedback system is constructed, in the detection process, when the pen frame 14 moves, the driven wheel 43 is driven to rotate through friction transmission, the driven wheel 43 has the same radius as the driving wheel 9, and the rotation angle of the scale rod 42 is proportional to the displacement of the detection rod 5;

[0078] The scale marks on the scale disc 40 can directly read the displacement value, which solves the problem that the existing laser measuring instruments need to rely on external data processing modules for displacement calculation, realizes real-time visual reading of detection data, and the operator can intuitively judge the flatness deviation of the part by the scale value pointed by the scale rod 42, without professional data analysis skills, at the same time, the friction lines on the surfaces of the driving wheel 9 and the driven wheel 43 improve the transmission efficiency and avoid the slipping phenomenon in high-speed detection, so that the displacement measurement resolution is improved, the response speed is improved compared with the traditional optical reading method, and it is suitable for rapid online detection of motor part production lines;

[0079] The transmission system comprises a bottom shaft 32 and a belt pulley 33 rotatably connected to the rack 1, the bottom shaft 32 and the magnetic clamp table 3 are each provided with a first bevel gear, the two first bevel gears are orthogonal, the belt pulley 33 and the bottom shaft 32 are each provided with a second bevel gear, the two second bevel gears are orthogonal, the tensioning block 34 is slidably installed on the lifting frame 30, the side surface of the tensioning block 34 is provided with a tensioning spring 35 limited by the lifting frame 30, the tensioning wheel 36 is rotatably installed on the tensioning block 34, the first synchronous toothed belt is drivingly installed on the tensioning wheel 36, the two transmission rollers 37 are rotatably installed on the detection frame 4, one transmission roller 37 and the belt pulley 33 are drivingly connected with the first synchronous toothed belt, the two transmission rollers 37 are linked through the second synchronous toothed belt, and the axis of the recording pen 19 is perpendicular to the axis of the transmission roller 37.

[0080] The transmission system converts the rotary motion of the magnetic clamp table 3 into synchronous rotation of the bottom shaft 32 and the belt pulley 33 through the orthogonal meshing structure of the first bevel gear and the second bevel gear, and then drives the transmission roller 37 to move the drawing paper 23 through the first synchronous toothed belt, so that the magnetic clamp table 3 and the drawing paper 23 are linked at the same speed, and the tensioning block 34 and the tensioning spring 35 are cooperatively designed to automatically adjust the tension of the first synchronous toothed belt and compensate for the double-axis displacement of the detection frame 4.

[0081] In the working process, when the motor 2 drives the magnetic clamp table 3 to rotate the measured motor shaft 46, the drawing paper 23 moves synchronously with the magnetic clamp table 3 through the transmission system, so that the trajectory drawn by the recording pen 19 corresponds to the surface profile of the part one by one, and a complete developed planar graph is formed. This scheme solves the problem of trajectory distortion caused by the asynchronization of part rotation and recording in traditional detection, replaces electronic synchronous control with mechanical linkage, reduces system delay and failure rate, and reduces the synchronization error between the moving speed of the drawing paper 23 and the rotating speed of the magnetic clamp table 3.

[0082] The transmission system comprises a bottom shaft 32 and a belt pulley 33 rotatably connected to the rack 1, the bottom shaft 32 and the magnetic clamp table 3 are each provided with a first bevel gear, the two first bevel gears are orthogonal, the belt pulley 33 and the bottom shaft 32 are each provided with a second bevel gear, the two second bevel gears are orthogonal, the tensioning block 34 is slidably installed on the lifting frame 30, the side surface of the tensioning block 34 is provided with a tensioning spring 35 limited by the lifting frame 30, the tensioning wheel 36 is rotatably installed on the tensioning block 34, the first synchronous toothed belt is drivingly installed on the tensioning wheel 36, the two transmission rollers 37 are rotatably installed on the detection frame 4, one transmission roller 37 and the belt pulley 33 are drivingly connected with the first synchronous toothed belt, the two transmission rollers 37 are linked through the second synchronous toothed belt, and the axis of the recording pen 19 is perpendicular to the axis of the transmission roller 37.

[0083] The fixed shaft 38 is in orthogonal engagement with the bottom shaft 32 through a third bevel gear, and the movable shaft 39 is in sliding connection with the fixed shaft 38 through a hexagonal sliding groove, so that the rotary drive and the lifting self-adaption of the copying table 24 are realized. In the working process, when the bottom shaft 32 rotates, the fixed shaft 38 is driven to rotate through the third bevel gear, and the movable shaft 39 rotates synchronously with the fixed shaft 38 due to the hexagonal cross-section structure, and can slide axially along the sliding groove, so as to adapt to the height change of the detection frame 4 under the drive of the screw lifting module 29. This design solves the problem of interference between the copying table 24 and the detection frame 4 in the lifting movement in the traditional detection equipment, and ensures that the engraving disc 25 always maintains the correct engraving position relationship with the engraving rod 26.

[0084] The gas pump 44 and the air cleaning nozzle 45 are further installed on the detection frame 4, the air cleaning nozzle 45 is arranged in parallel with the laser ranging probe 12, and the gas outlet port of the gas pump 44 is fixedly communicated with the air cleaning nozzle 45.

[0085] The parallel arrangement of the gas pump 44 and the air cleaning nozzle 45 can quickly remove dust, oil stains and impurities on the surface of the motor part to be measured before the laser ranging probe 12 works, so as to avoid the scattering or shielding of the laser beam by the particulate matter and ensure the laser ranging accuracy.

[0086] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser measuring instrument for detecting flatness of motor parts, comprising a magnetic chuck (3) driven by a motor (2), characterized in that, Also include: The detection frame (4) is provided with a detection rod (5) and a laser scanner (6) fixedly installed on the detection frame (4), the bottom end of the detection rod (5) is embedded with a universal steel ball (7), the detection frame (4) is rotatably installed with a measuring shaft (8), the measuring shaft (8) is respectively installed with a driving wheel (9), a first rotating wheel (10) and a second rotating wheel (11), the driving wheel (9) is frictionally connected with the detection rod (5), the detection frame (4) is fixedly installed with a laser ranging probe (12) arranged opposite to the detection rod (5); A marking frame (13), a pen frame (14), an ink frame (15) and a trigger plate (16) are frictionally connected with the first rotating wheel (10) and the second rotating wheel (11), a group of first spring return members (17) are installed between the pen frame (14) and the detection frame (4), a group of return springs (18) are installed on the bottom surface of the marking frame (13) and limited by the detection frame (4), a recording pen (19) is installed on the pen frame (14), a pressure trigger rod (20) is screwedly installed on the bottom of the marking frame (13), a group of second spring return members (21) are installed between the trigger plate (16) and the ink frame (15) and limited by the detection frame (4), the ink frame (15) is slidably connected with the detection rod (5) and the bottom surface of the ink frame (15) is installed with an ink ring (22) coaxially arranged with the detection rod (5). The transmission system is linked with the magnetic clamp table (3), the drawing paper (23) and the copying table (24) are driven to move at the same speed on the transmission system, the copying table (24) is magnetically attracted with the engraved disc (25), the marking frame (13) is slidably connected with the engraved rod (26) matched with the engraved disc (25), the top of the engraved rod (26) and the detection rod (5) are provided with the counterweight (27), further comprising a rack (1), the microcontroller (28) is installed on the rack (1), the data end of the laser scanner (6) and the laser ranging probe (12) are connected with the microcontroller (28), the vertical silk rod lifting module (29) is installed on the rack (1), the lifting frame (30) is driven and installed on the silk rod lifting module (29), the axial driving module (31) is installed on the lifting frame (30), the axial driving module (31) is drivingly connected with the detection frame (4), the magnetic clamp table (3) is magnetically attracted with the motor shaft (46) to be measured, the first spring return (17) and the second spring return (21) comprise a guide rod and a reset spring sleeved on the guide rod, the guide rod in the first spring return (17) is fixed on the pen holder (14) and is slidably connected with the detection frame (4), the reset spring in the first spring return (17) is arranged between the pen holder (14) and the detection frame (4), the guide rod in the second spring return (21) is slidably connected with the ink holder (15) and the trigger plate (16) at both ends, the reset spring in the second spring return (21) is arranged between the trigger plate (16) and the detection frame (4), further comprising a scale disc (40) fixedly installed on the detection frame (4) and a scale shaft (41) rotatably installed on the scale disc (40), the scale shaft (41) is fixedly installed with a marker (42) and a driven wheel (43), the driven wheel (43) is frictionally driven with the pen holder (14), the scale disc (40) is provided with a scale mark, the driven wheel (43) has the same radius as the driving wheel (9), the first pulley (10) and the second pulley (11) have the same radius, the radius of the first pulley (10) is 20 times the radius of the driving wheel (9), the driving wheel (9), the driven wheel (43), the first pulley (10), the second pulley (11), the marking frame (13) and the pen holder (14) are all provided with friction lines.

2. The laser measuring instrument for detecting flatness of motor parts according to claim 1, wherein The transmission system comprises a bottom shaft (32) and a belt pulley (33) rotatably connected to the frame (1), the bottom shaft (32) and the magnetic clamp table (3) are each provided with a first bevel gear, the two first bevel gears are orthogonal and meshed, the belt pulley (33) and the bottom shaft (32) are each provided with a second bevel gear, the two second bevel gears are orthogonal and meshed, the lifting frame (30) is slidably provided with a tension block (34), the side surface of the tension block (34) is provided with a tension spring (35) limited by the lifting frame (30), the tension block (34) is rotatably provided with a tension pulley (36), the tension pulley (36) is drivingly provided with a first synchronous toothed belt, the recording frame (4) is rotatably provided with two transmission rollers (37), one of the transmission rollers (37) and the belt pulley (33) are drivingly connected with the first synchronous toothed belt, the two transmission rollers (37) are linked through a second synchronous toothed belt, and the axis of the recording pen (19) is perpendicular to the axis of the transmission roller (37).

3. The laser measuring instrument for detecting flatness of motor parts according to claim 2, wherein Further comprising a fixed shaft (38) rotatably connected to the frame (1), the fixed shaft (38) and the bottom shaft (32) are each provided with a third bevel gear, the two third bevel gears are orthogonal and meshed, the lifting frame (30) is rotatably provided with a movable shaft (39), the fixed shaft (38) is internally provided with a sliding groove with an open top end and slidably connected with the movable shaft (39), the sliding groove and the movable shaft (39) are both hexagonal in cross section, and the top end of the movable shaft (39) is fixedly connected with the copying table (24).

4. The laser measuring instrument for detecting flatness of motor parts according to claim 1, wherein The marking frame (13) and the recording frame (4) are each provided with two symmetrically arranged guide grooves, the recording rod (5) and the engraving rod (26) are each provided with two symmetrically arranged guide blocks slidably connected with the guide grooves, the dial (25) is made of modified thermoplastic polyurethane composite material, and the bottom end of the engraving rod (26) is provided with a diamond carving head.

5. The laser measuring instrument for detecting flatness of motor parts according to claim 1, wherein, Further comprising an air pump (44) and an air cleaning nozzle (45) mounted on the recording frame (4), the air cleaning nozzle (45) is arranged in parallel with the laser ranging probe (12), and the air outlet port of the air pump (44) is fixedly communicated with the air cleaning nozzle (45).

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