An off-line diameter and ovality laser inspection apparatus

Abstract

The utility model discloses an offline diameter and ovality laser detection equipment relates to mechanical manufacturing detection technical field, including support plate, L type support plate, provide the support effect to two limit base through the positioning arm setting, the hydraulic cylinder drive hydraulic piston rod adjusting support arm use height, the position distance between the convenient adjustment limit ring and transparent detection tray, the limit ring, limit base all can use positioning to the shaft that needs to detect, and elastic chucking ball can be according to the shaft size adjusting telescopic link use length and chucking hole chucking, and the distance between the arc limit ring and the detected object is conveniently adjusted to clamp the work, the horizontal detector setting can detect the horizontal perpendicularity of the detected object and transparent detection tray, the transparent detection tray setting can carry out detection work synchronously up and down, the use angle of limit ring is adjusted to the adjusting arm setting, and the convenient disassembly is set up, and the transparent detection tray is sensed through the wire and detection sensor, and its detection data is gathered to the acquisition block.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing testing technology, and in particular to an offline laser testing device for diameter and ellipticity. Background Technology

[0002] In the fields of mechanical manufacturing, precision machining, and automated production, the machining quality of rotating parts (such as drive shafts, piston rods, and cylindrical pins) directly determines the performance and lifespan of the entire machine. Among them, the diameter (offline diameter) and ellipticity (roundness error) of shaft parts are the core indicators for measuring machining accuracy and must be strictly tested and controlled.

[0003] A patent with publication number CN118492122B discloses an ellipticity correction device. This patent includes a wind turbine bearing inner ring, a primary actuator, a primary drive screw, a primary sleeve, an arc-shaped positioning plate, a reinforcing component, a limiting sleeve, a limiting rod, a rotating module, a sliding arc plate, a correction module, a hydraulic cylinder, a top plate, a primary laser rangefinder, a primary reflector, rollers, a stabilizing sleeve, a stabilizing rod, a limiting slot, and a limiting plate. When ellipticity correction of the wind turbine bearing inner ring is required, the positioning module positions the device at the center of the inner ring cavity, bringing the ellipticity detection module into contact with the inner ring. The rotating module then rotates the ellipticity detection module one revolution around the outer wall of the inner ring, allowing the ellipticity detection module to detect the ellipticity of the inner ring. Ellipticity: When the ellipticity exceeds the standard, the rotation module rotates the ellipticity detection module back to its maximum diameter position. The correction module then corrects the ellipticity of the wind turbine bearing inner ring, completing one correction. During correction, a secondary laser rangefinder and a secondary reflector monitor the correction amplitude to prevent excessive compression that could cause cracks in the wind turbine bearing inner ring. After one correction, the rotation module and ellipticity detection module re-detect the ellipticity of the wind turbine bearing inner ring. If the detected ellipticity exceeds the standard, the correction equipment continues to correct it. After each correction, the ellipticity of the wind turbine bearing inner ring is detected again. The correction ends when the ellipticity value meets the standard. However, the following problems still exist in this patent: Existing inspection stations are typically designed for shafts of specific specifications. When dealing with shafts of different diameters and lengths, fixture changes become cumbersome. Traditional fixed bases lack multi-dimensional adjustment capabilities, making it difficult to ensure the shaft under test remains absolutely level and concentric during inspection. Even slight wobbling or misalignment of the shaft will directly lead to distortion of laser scanning data, affecting the accuracy of ellipticity calculations. The relative position between the laser sensor and the object under test is crucial to inspection accuracy. Existing equipment often has rudimentary adjustment mechanisms, mostly relying on manual bolt adjustments, which are not only laborious to operate but also difficult to achieve precise fine-tuning. In particular, when adjusting the vertical distance between the transparent inspection disc (or laser scanning plane) and the limiting support ring, the lack of a smooth and precise lifting mechanism like hydraulic drive results in low alignment efficiency for workpieces of different specifications. The relative position between the laser sensor and the object under test is critical to inspection accuracy. Crucially, the adjustment mechanisms of existing equipment are often rudimentary, mostly relying on manual bolt adjustments. This is not only labor-intensive but also makes precise fine-tuning difficult. In particular, when adjusting the vertical distance between the transparent inspection disc (or laser scanning plane) and the limiting support ring, the lack of a smooth and precise lifting mechanism like hydraulic drive leads to low efficiency in aligning workpieces of different sizes. Traditional offline inspection equipment often separates the positioning device from the sensing system, lacking a real-time monitoring device for the horizontal and vertical alignment of the workpiece relative to the inspection disc. If the workpiece is not placed horizontally, the laser inspection path will deviate. Furthermore, during the transmission of inspection data to the acquisition module via wires, the lack of a systematic integrated design makes it susceptible to signal interference, affecting the final quality of data acquisition.

[0004] To address the above issues, it is necessary to design an offline laser detection device for diameter and ellipticity to overcome these problems. Utility Model Content

[0005] The main objective of this invention is to provide an offline laser detection device for diameter and ellipticity, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An offline diameter and ellipticity laser detection device includes a support plate and an L-shaped support plate. A hydraulic cylinder is installed at the bottom of the support plate, and a hydraulic piston rod is connected to the output end of the hydraulic cylinder. A locking plate is installed on the outer wall of the hydraulic piston rod. A connecting shaft is installed at the top of the hydraulic piston rod, and a support arm is installed at the top of the connecting shaft. A support frame is installed at the top of the support arm, and a first clamping frame is installed at the top of the support frame. A second clamping frame is installed at the top of the first clamping frame. Mounting grooves are provided at both ends of the inner sides of the first and second clamping frames. A telescopic rod is connected to one end of each of the first and second clamping frames. Multiple clamping holes are provided at the top of the telescopic rod. An elastic clamping ball is connected to the inner side of the mounting groove through a telescopic shaft. An arc-shaped limiting ring is connected to the end of the telescopic rod away from the first and second clamping frames. A level detector is provided at the bottom end of the arc-shaped limiting ring.

[0007] As a preferred embodiment of this utility model, a locking rod is installed through the bottom of the L-shaped support plate, and positioning arms are installed at both ends of the locking rod. The end of the positioning arm away from the locking rod is connected to a base plate, and a limiting base is installed on the top of the base plate. As a preferred embodiment of this utility model, a fixing frame is installed at both ends of the support plate, a transparent detection plate is installed on both sides of the fixing frame, a collection block is provided at one end of the top of the fixing frame, a detection sensor is provided at the top of the collection block, and a wire is connected to one end of the detection sensor.

[0008] As a preferred embodiment of this utility model, an adjusting arm is connected to the inner side of the support arm, and a limit ring is connected to one end of both the support arm and the adjusting arm. A clamping pad is installed on the inner side of the limit ring, and the connecting shaft and the support arm are rotatably connected to the limit ring, and the connecting shaft is rotatably connected to the support arm.

[0009] In a preferred embodiment of this utility model, the support arm is rotatably connected to the support frame, the support frame is fixedly connected to the first clamping frame, the first clamping frame is fixedly connected to the second clamping frame, and both the first clamping frame and the second clamping frame are rotatably connected to the telescopic rod.

[0010] In a preferred embodiment of this utility model, the locking hole is engaged with the elastic locking ball, the telescopic rod is rotatably connected to the arc-shaped limiting ring, and the arc-shaped limiting ring is fixedly connected to the leveling instrument.

[0011] As a preferred embodiment of this utility model, the locking rod is fixedly connected to the two positioning arms, the positioning arms are fixedly connected to the base plate, and the base plate is fixedly connected to the limiting base.

[0012] In a preferred embodiment of this utility model, the fixed frame is fixedly connected to the support plate, the fixed frame is fixedly connected to the transparent detection disk, the transparent detection disk is electrically connected to the detection sensor through the wire, and the detection sensor is electrically connected to the wire.

[0013] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: This offline diameter and ellipticity laser inspection device uses a positioning arm to support two limiting bases. A hydraulic cylinder drives a hydraulic piston rod to adjust the height of the support arm, facilitating the adjustment of the positional distance between the limiting ring and the transparent inspection plate. Both the limiting ring and the limiting base can be used to position the shaft to be inspected. An elastic clamping ball can adjust the length of the telescopic rod and clamping hole according to the shaft size, facilitating the adjustment of the distance between the arc-shaped limiting ring and the object being inspected for clamping. A level detector can measure the horizontal and vertical alignment of the object being inspected and the transparent inspection plate. The transparent inspection plate can perform simultaneous vertical and horizontal inspections. An adjusting arm can adjust the angle of the limiting ring for easy disassembly. The transparent inspection plate is connected to a detection sensor via wires to collect the detection data to the acquisition block. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the hydraulic piston rod installation structure of this utility model; Figure 3 This is a schematic diagram of the installation structure of the transparent detection disc of this utility model; Figure 4 This is a schematic diagram of the installation structure of the leveling instrument of this utility model; Figure 5 This is a schematic diagram of structure A of this utility model.

[0015] In the diagram: 1. Support plate; 2. L-shaped support plate; 3. Locking rod; 4. Positioning arm; 5. Base plate; 6. Limiting base; 7. Hydraulic cylinder; 8. Locking plate; 9. Hydraulic piston rod; 10. Fixing frame; 11. Transparent detection disc; 12. Acquisition block; 13. Detection sensor; 14. Wire; 15. Connecting shaft; 16. Support arm; 17. Adjusting arm; 18. Limiting ring; 19. Clamping pad; 20. Support frame; 21. First clamping frame; 22. Second clamping frame; 23. Telescopic rod; 24. Arc-shaped limiting ring; 25. Leveling instrument; 26. Clamping hole; 27. Elastic clamping ball; 28. Mounting groove. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figures 1-5 As shown, an offline diameter and ellipticity laser detection device includes a support plate 1 and an L-shaped support plate 2. A hydraulic cylinder 7 is installed at the bottom of the support plate 1. A hydraulic piston rod 9 is connected to the output end of the hydraulic cylinder 7. A locking plate 8 is installed on the outer wall of the hydraulic piston rod 9. A connecting shaft 15 is installed at the top of the hydraulic piston rod 9. A support arm 16 is installed at the top of the connecting shaft 15. A support frame 20 is installed at the top of the support arm 16. A first clamping frame 21 is installed at the top of the support frame 20. A first clamping frame 21 is installed at the top of the first clamping frame 21. There is a second clamping frame 22. Both ends of the inner side of the first clamping frame 21 and the second clamping frame 22 are provided with mounting grooves 28. One end of the first clamping frame 21 and the second clamping frame 22 is connected to a telescopic rod 23. The top of the telescopic rod 23 is provided with multiple clamping holes 26. The inner side of the mounting groove 28 is connected to an elastic clamping ball 27 through a telescopic shaft. The end of the telescopic rod 23 away from the first clamping frame 21 and the second clamping frame 22 is connected to an arc-shaped limiting ring 24. A level detector 25 is provided at one end of the bottom of the arc-shaped limiting ring 24. An adjusting arm 17 is connected to the inner side of the support arm 16. One end of both the support arm 16 and the adjusting arm 17 is connected to a limit ring 18. A clamping pad 19 is installed on the inner side of the limit ring 18. The connecting shaft 15 and the support arm 16 are rotatably connected to the limit ring 18, and the connecting shaft 15 is rotatably connected to the support arm 16. The support arm 16 is rotatably connected to the support frame 20. The support frame 20 is fixedly connected to the first clamping frame 21. The first clamping frame 21 is fixedly connected to the second clamping frame 22. Both the first clamping frame 21 and the second clamping frame 22 are rotatably connected to the telescopic rod 23. The clamping hole 26 engages with the elastic clamping ball 27. The telescopic rod 23 is rotatably connected to the arc-shaped limit ring 24. The arc-shaped limit ring 24 is fixedly connected to the level detector 25. Specifically, in this embodiment, a hydraulic cylinder 7 is installed at the bottom center of the support plate 1. The output end of the hydraulic cylinder 7 is connected to a hydraulic piston rod 9. A locking plate 8 is provided on the outer wall of the hydraulic piston rod 9 to enhance stability. A support arm 16 is rotatably connected to its top via a connecting shaft 15. A support frame 20 is rotatably connected to the top of the support arm 16. A first clamping frame 21 and a second clamping frame 22 are fixedly installed on the top of the support frame 20 in sequence. Mounting grooves 28 are provided on the inner sides of both ends of the first clamping frame 21 and the second clamping frame 22. Elastic clamping balls 27 are installed in the mounting grooves via telescopic shafts. Telescopic rods 23 are rotatably connected to the ends of the first clamping frame 21 and the second clamping frame 22. Several clamping holes 26 are provided on the telescopic rod 23 along its length. The elastic clamping balls 27 are engaged with the clamping holes 26 to fix the extension length of the telescopic rod 23. An arc-shaped limiting ring 24 is rotatably connected to the end of the telescopic rod 23. A level detector 25 is installed at the bottom of the arc-shaped limiting ring 24. An adjusting arm 17 is also connected to the inner side of the support arm 16. Limiting rings 18 are connected to the ends of both the support arm 16 and the adjusting arm 17. The connecting shaft 15 and the support arm 16 are rotatably connected to the limiting ring 18, thereby allowing the limiting ring 18 to be angled. A clamping pad 19 is installed on the inner wall of the limiting ring 18 to increase friction.

[0018] An L-shaped support plate 2 is fitted with a locking rod 3 at its bottom. Positioning arms 4 are installed at both ends of the locking rod 3. The end of the positioning arm 4 away from the locking rod 3 is connected to a base plate 5. A limit base 6 is installed on the top of the base plate 5. Fixing frames 10 are installed at both ends of the support plate 1. Transparent detection plates 11 are installed on both sides of the fixing frames 10. A collection block 12 is set at one end of the top of the fixing frame 10. A detection sensor 13 is set at the top of the collection block 12. A wire 14 is connected to one end of the detection sensor 13. The locking rod 3 is fixedly connected to the two positioning arms 4, the positioning arms 4 are fixedly connected to the base plate 5, and the base plate 5 is fixedly connected to the limiting base 6; the fixed frame 10 is fixedly connected to the support plate 1, the fixed frame 10 is fixedly connected to the transparent detection plate 11, the transparent detection plate 11 is electrically connected to the detection sensor 13 through the wire 14, and the detection sensor 13 is electrically connected to the wire 14. Specifically, in this embodiment, an L-shaped support plate 2 is vertically installed on one side of the support plate 1. A locking rod 3 is provided through the bottom of the L-shaped support plate 2. Positioning arms 4 are fixedly connected to both ends of the locking rod 3. The positioning arms 4 extend to the other side of the support plate 1 and are fixedly connected to the bottom plate 5 at their ends. Two limiting bases 6 are installed on the upper surface of the bottom plate 5 for placing the bottom of the shaft to be tested. Fixing frames 10 are installed at both ends of the support plate 1. Transparent detection disks 11 are installed on both sides of the fixing frames 10. A collection block 12 is installed at one end of the top of the fixing frame 10. A detection sensor 13 is provided on the collection block 12. The detection sensor 13 is electrically connected to the transparent detection disk 11 through a wire 14.

[0019] It should be noted that this utility model is an offline diameter and ellipticity laser inspection device. During use, the operator places the shaft-type workpiece to be inspected on two limiting bases 6. At this time, the limiting bases 6 provide bottom support for the workpiece, preventing it from directly contacting the inspection platform, facilitating subsequent laser penetration inspection. The hydraulic cylinder 7 is activated, driving the hydraulic piston rod 9 to perform vertical lifting and lowering movements. The hydraulic piston rod 9, through the connecting shaft 15, drives the support arm 16 and the support frame 20, the first clamping frame 21, and the second clamping frame 22 above it to lift and lower synchronously, adjusting the relative vertical distance between the limiting ring 18 and the transparent inspection plate 11, ensuring that the limiting ring 18 is positioned within the workpiece to be inspected. The appropriate height position of the cross section is determined, and the laser scanning path is ensured to be within the effective area. After the height is adjusted to the correct position, the telescopic rod 23 is pulled to adjust its length within the first clamping frame 21 and the second clamping frame 22 according to the diameter of the shaft to be inspected. When the telescopic rod 23 moves, the elastic clamping ball 27 in the mounting groove 28 is compressed. When the arc-shaped limiting ring 24 is adjusted to be in close contact with the workpiece surface, the elastic clamping ball 27 springs into the corresponding clamping hole 26, locking the telescopic length, thereby firmly clamping the shaft to be inspected. At this time, the level detector 25 set at the bottom of the arc-shaped limiting ring 24 starts to work, and detects the horizontal and verticality of the workpiece relative to the transparent detection disk 11 below in real time. If tilting is detected, the hydraulic cylinder can be finely adjusted or the workpiece can be repositioned to ensure the detection axis is vertical. To prevent the slender shaft from bending or shaking during the detection process, the adjusting arm 17 can be rotated to adjust the angle of the limiting ring 18, so that it is locked in another appropriate position on the workpiece in conjunction with the locking pad 19 on the inner wall. This structure is designed as a rotating connection, which facilitates quick rotation of the angle after the detection is completed, making it easy to disassemble and remove the workpiece. After the workpiece is stably positioned and leveled, the detection sensor 13 is activated. The laser passes through the transparent detection disk 11 to scan the workpiece from top to bottom synchronously to detect the diameter and ellipticity. The transparent detection disk 11 protects the internal optical path from external interference while allowing the laser to penetrate. The optical signal generated during the detection process is transmitted to the acquisition block 12 through the wire 14. The acquisition block 12 processes, calculates, and analyzes the received data to obtain accurate diameter values ​​and ellipticity errors. After the inspection is completed, the operating adjustment arm 17 rotates the limiting ring 18 to release the constraint on the workpiece, presses the elastic clamping ball 27 to disengage it from the clamping hole 26, and retracts the telescopic rod 23 to remove the arc-shaped limiting ring 24. The workpiece that has been inspected can then be removed for the next round of work.

[0020] Compared to the prior art and common existing technologies, which mainly target specific calibration scenarios for the inner ring of wind turbine bearings, their positioning modules, while able to extend into the center of the inner ring, lack a flexible lifting mechanism for the detection height of external shaft components. This invention, through hydraulic lifting, can easily adjust the vertical distance between the limiting ring and the transparent detection disc, avoiding the tediousness and errors of manual adjustment. This significantly improves the equipment's height adaptability and alignment efficiency while ensuring the laser scanning path is always in the optimal effective area. This invention, through a retractable structure located inside the first and second clamping frames, utilizes elastic clamping balls and clamping holes on the telescopic rod to achieve the effect of securely clamping various shaft parts of different diameters with a single device. Unlike existing patents that require the positioning module to be located in the center of the inner ring cavity of the wind turbine bearing and primarily target contact detection of inner rings of specific sizes, this invention quickly changes the extension length of the telescopic rod by pressing the elastic clamping ball, driving the arc-shaped limiting ring to tightly adhere to the workpiece surface. This design not only overcomes… This invention overcomes the shortcomings of traditional inspection table fixtures, which are limited in specifications and cumbersome to replace. Furthermore, it achieves rapid clamping and locking of workpieces with a wide range of diameter variations without requiring any component replacement, greatly improving the versatility and operational speed of offline inspection. This invention utilizes a horizontal measuring instrument installed at the bottom of an arc-shaped limiting ring, combined with a rotatable adjusting arm working in conjunction with the limiting ring and clamping pad for multi-point auxiliary support. This structure achieves real-time monitoring of the workpiece's horizontal and vertical alignment relative to the inspection surface and effectively suppresses bending or vibration during the inspection of slender shafts. In contrast, existing patents primarily focus on monitoring the diameter change of the inner ring during the calibration process, without addressing the overall horizontal orientation calibration and vibration prevention of the workpiece on the inspection table. This invention uses a horizontal measuring instrument to provide real-time data feedback, preventing distortion of laser scanning data caused by slight shaft tilt. Simultaneously, the rotation of the adjusting arm allows for flexible selection of auxiliary support points, eliminating inspection interference caused by improper workpiece placement or deformation from a physical structural perspective. This ensures that the calculated diameter and ellipticity errors are highly accurate.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An off-line diameter and ovality laser detection device comprising a support plate (1), an L-shaped support plate (2), characterized in that: A hydraulic cylinder (7) is installed at the bottom of the support plate (1). A hydraulic piston rod (9) is connected to the output end of the hydraulic cylinder (7). A locking plate (8) is installed on the outer wall of the hydraulic piston rod (9). A connecting shaft (15) is installed at the top of the hydraulic piston rod (9). A support arm (16) is installed at the top of the connecting shaft (15). A support frame (20) is installed at the top of the support arm (16). A first clamping frame (21) is installed at the top of the support frame (20). A second clamping frame (22) is installed at the top of the first clamping frame (21). (21) The inner sides of the second clamping frame (22) are provided with mounting grooves (28). One end of the first clamping frame (21) and the second clamping frame (22) is connected to a telescopic rod (23). The top of the telescopic rod (23) is provided with multiple clamping holes (26). The inner side of the mounting groove (28) is connected to an elastic clamping ball (27) through a telescopic shaft. The end of the telescopic rod (23) away from the first clamping frame (21) and the second clamping frame (22) is connected to an arc-shaped limiting ring (24). A level detector (25) is provided at the bottom end of the arc-shaped limiting ring (24).

2. An off-line diameter and ovality laser inspection apparatus according to claim 1, characterized in that: The L-shaped support plate (2) has a locking rod (3) installed through its bottom. Both ends of the locking rod (3) are equipped with positioning arms (4). The end of the positioning arm (4) away from the locking rod (3) is connected to a base plate (5). The top of the base plate (5) is equipped with a limiting base (6).

3. The off-line diameter and ovality laser inspection apparatus of claim 1, wherein: The support plate (1) is equipped with a fixed frame (10) at both ends. A transparent detection plate (11) is installed on both sides of the fixed frame (10). A collection block (12) is provided at one end of the top of the fixed frame (10). A detection sensor (13) is provided at the top of the collection block (12). A wire (14) is connected to one end of the detection sensor (13).

4. The off-line diameter and ovality laser inspection apparatus of claim 1, wherein: An adjusting arm (17) is connected to the inner side of the support arm (16). One end of the support arm (16) and the adjusting arm (17) is connected to a limiting ring (18). A clamping pad (19) is installed on the inner side of the limiting ring (18). The connecting shaft (15) and the support arm (16) are rotatably connected to the limiting ring (18). The connecting shaft (15) is rotatably connected to the support arm (16).

5. The off-line diameter and ovality laser inspection apparatus of claim 1, wherein: The support arm (16) is rotatably connected to the support frame (20), the support frame (20) is fixedly connected to the first clamping frame (21), the first clamping frame (21) is fixedly connected to the second clamping frame (22), and both the first clamping frame (21) and the second clamping frame (22) are rotatably connected to the telescopic rod (23).

6. An off-line diameter and ovality laser inspection apparatus as defined in claim 1, wherein: The clamping hole (26) is engaged with the elastic clamping ball (27), the telescopic rod (23) is rotatably connected with the arc-shaped limiting ring (24), and the arc-shaped limiting ring (24) is fixedly connected with the level detector (25).

7. An off-line diameter and ovality laser inspection apparatus as defined in claim 2, wherein: The locking rod (3) is fixedly connected to the two positioning arms (4), the positioning arms (4) are fixedly connected to the base plate (5), and the base plate (5) is fixedly connected to the limiting base (6).

8. An off-line diameter and ovality laser inspection apparatus as defined in claim 3, wherein: The fixed frame (10) is fixedly connected to the support plate (1), the fixed frame (10) is fixedly connected to the transparent detection disk (11), the transparent detection disk (11) is electrically connected to the detection sensor (13) through the wire (14), and the detection sensor (13) is electrically connected to the wire (14).

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