Gear clearance detection device and detection method thereof

Abstract

The invention belongs to the technical field of gear clearance detection, and discloses a gear clearance detection device and a detection method.The detection device comprises a detection table, a top plate is fixedly installed at the top end of the detection table through four stand columns, a CCD visual detection module is slidably installed at the bottom end of the top plate, and a double-shaft position adjusting module is installed at the top end of the detection table; a first vertical shaft is rotationally installed at the driving end of the double-shaft position adjusting module, a first chuck is installed at the top end of the first vertical shaft, and an auxiliary position roller sweeping groove structure in transmission connection with the first vertical shaft is installed at the driving end of the double-shaft position adjusting module. A second vertical shaft is rotatably mounted on the other side of the top end of the detection table, a second chuck is mounted at the top end of the second vertical shaft, a main position roller sweeping groove structure in transmission connection with the second vertical shaft is arranged on the side, away from the first chuck, of the second chuck, and a rotation driving module used for driving the second vertical shaft to rotate is mounted on one side of the bottom end of the detection table. According to the invention, the meshing state of the two gears can be automatically detected.

Description

Technical Field

[0001] This invention belongs to the field of gear backlash detection technology, specifically, it relates to a gear backlash detection device and its detection method. Background Technology

[0002] The precision of gear meshing directly affects the performance and lifespan of mechanical equipment. Therefore, timely detection of gear clearance can effectively avoid problems such as noise, vibration, and wear caused by improper clearance, reducing the risk of equipment failure. Among them, gear clearance detection devices using CCD vision can detect the clearance between two gears to be meshed. The structure of such devices mainly includes a CCD camera, a light source, an image processing unit, a control system, and mechanical fixtures. The detection process begins with the automatic clamping of the gears and system initialization. Then, the CCD camera captures the first clear image of the meshing area at the initial position. The image processing software accurately identifies the tooth profile through edge detection and sub-pixel positioning technology. Next, the motion unit drives the movable gear to first eliminate the clearance and then rotate in the opposite direction until it is out of contact, capturing a second image at this new position. The software calculates the physical value of the tooth clearance by comparing the positional changes of the same tooth surface edge in the two images and combining the system calibration parameters. Finally, the system automatically determines the result and outputs it, which can immediately guide product sorting or provide feedback to the assembly line for proactive adjustment.

[0003] Chinese invention patent application number CN201910042298.5 discloses a method for detecting gear burrs and a high-precision visual measurement system for gears. The gear measurement system includes a first vision subsystem, a second vision subsystem, a server, and a machine tool subsystem. The first vision subsystem acquires a first image of the gear along its axial direction; the second vision subsystem acquires a second image of the gear along a direction perpendicular to its axial direction; the server processes the first and second images to measure the shape parameters of the gear; and the machine tool subsystem moves the gear to a designated position suitable for image acquisition. This technical solution involves comparing the gear's burr... The data is used to calculate the gap between the gears and determine whether it is within the acceptable range. However, in order to ensure the comprehensiveness of gear gap detection, the two gears are kept rotating, and air jet cleaning is used to remove the debris that may be generated during the rotation of the new gear, so as to reduce the influence of debris shadow on the misjudgment of gear gap profile. However, air jet cleaning requires separate arrangement of air source, air jet structure, etc. The arrangement of air source not only needs to consider the type of air source (such as compressed air or other gases), but also the supply pressure and flow rate of the air source. Its procurement and maintenance costs are relatively high. For example, the filter element in the air source is a consumable and needs to be replaced regularly to maintain the quality of the air source. Otherwise, dusty gas may contaminate the gear surface or optical lens, which is counterproductive. Summary of the Invention

[0004] The purpose of this invention is to provide a gear backlash detection device and method. One of the gears to be tested is fixed at the top of the second vertical shaft by a second chuck. The dual-shaft adjustment module adjusts the position of the first chuck and the other gear to be tested until the two gears are in good meshing state. The control panel commands the rotation drive module to drive the second vertical shaft to rotate, thereby causing the two gears to rotate. At the same time, the CCD vision inspection module performs gear backlash detection. During the detection process, the main roller cleaning groove structure and the auxiliary roller cleaning groove structure also use the rotational power of the rotation drive module to clean the debris generated by the gear meshing and rotation, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A gear backlash detection device includes a detection platform. A top plate is fixedly mounted on the top of the detection platform via four columns. A CCD vision inspection module is slidably mounted on the bottom of the top plate via two rails. A dual-axis adjustment module is installed on one side of the top of the detection platform. A first vertical shaft is rotatably mounted on the drive end of the dual-axis adjustment module, and a first chuck is fixedly mounted on the top of the first vertical shaft. A secondary roller cleaning groove structure, which is connected to the first vertical shaft, is installed at the drive end of the dual-axis adjustment module on one side of the first chuck. The secondary roller cleaning groove structure is used to clean the gear tooth surface fixed by the first chuck. A second vertical shaft is rotatably mounted on the other side of the top of the detection platform. A second chuck is fixedly mounted on the top of the second vertical shaft. A primary roller cleaning groove structure, which is connected to the second vertical shaft, is provided on the side of the second chuck away from the first chuck. The primary roller cleaning groove structure is used to clean the gear tooth surface fixed by the second chuck. A rotary drive module for driving the second vertical shaft to rotate is installed on one side of the bottom of the detection platform.

[0006] The following are further optimizations of the above technical solution by the present invention: A control panel is installed on one side of the top of the inspection station. The control output terminal of the control panel is electrically connected to the control input terminal of the dual-axis adjustment module and the rotary drive module, respectively. The signal input terminal of the control panel is communicatively connected to the signal output terminal of the CCD vision inspection module.

[0007] Further optimization: The dual-axis adjustment module includes a screw lifting module fixedly installed on one side of the top of the detection table. A hanging frame is installed on the drive end of the screw lifting module. An L-shaped platform is slidably installed on the hanging frame in the horizontal direction. An automatic telescopic rod is installed on the outer wall of the hanging frame near the screw lifting module. The telescopic end of the automatic telescopic rod is fixedly connected to the outer wall of the L-shaped platform.

[0008] Further optimization: The top of the hanging frame is provided with a rectangular opening for the first vertical shaft to slide horizontally; the first vertical shaft is located in the middle of the rectangular opening, and the lower end of the first vertical shaft extends to the bottom of the hanging frame and is rotatably connected to the top of the L-shaped platform.

[0009] Further optimization: The rotary drive module includes a servo motor installed at the bottom of the inspection table and a side plate fixed on the other side of the top of the inspection table. A shaft platform is fixed on the outer wall of the side plate near the second vertical shaft. A bearing seat for supporting the rotation of the second vertical shaft is fixed on the outer wall of the shaft platform. The upper end of the power output shaft of the servo motor is connected to the lower end of the second vertical shaft. The control input end of the servo motor is electrically connected to the control output end of the control panel.

[0010] Further optimization: A circular grating encoder for detecting the rotational position of the servo motor output shaft is also installed on the outer wall of the shaft platform away from the side plate. The signal output end of the circular grating encoder is electrically connected to the signal input end of the control panel.

[0011] Further optimization: The main roller cleaning groove structure is set on one side of the outer wall of the shaft platform; the main roller cleaning groove structure includes a hollow shaft cylinder fixed on one side of the outer wall of the shaft platform, a vertical bevel gear shaft is vertically rotatably installed inside the hollow shaft cylinder, a convex plate is fixedly installed at the top of the shaft platform, a synchronous belt drive assembly is installed between the vertical bevel gear shaft and the second vertical shaft, a driven bevel gear shaft is rotatably installed on the convex plate, a second brush roller is detachably installed at one end of the driven bevel gear shaft, and the other end of the driven bevel gear shaft is meshed with the upper end of the vertical bevel gear shaft.

[0012] Further optimization: The auxiliary roller cleaning groove structure includes a side gear shaft rotatably mounted on the top of the hanging frame, a first brush roller is detachably mounted on the upper end of the side gear shaft, and an active gear disk is fixedly mounted on the outer wall of the first vertical shaft, the active gear disk meshing with the side gear shaft.

[0013] Further optimization: A convex key is integrally formed on the upper part of the outer wall of the side gear shaft, and a groove is provided on the lower end face of the first brush roller for interference fit with the convex key.

[0014] The present invention also provides a method for detecting gear backlash, using the aforementioned gear backlash detection device, comprising the following steps: S101: Securely clamp the two gears to be tested onto chuck No. 1 and chuck No. 2. After clamping, the operator starts the dual-axis adjustment module. The dual-axis adjustment module drives the first vertical shaft and the chuck No. 1 and gear on it to move in the horizontal plane to gradually approach the other gear fixed by chuck No. 2. The operator makes fine adjustments until the tooth profiles of the two gears mesh correctly at the predetermined depth. S102: After the meshing state is debugged, the rotary drive module is turned on to drive the second vertical shaft, together with the second chuck and gear on it, to rotate slowly and smoothly. The gear fixed by the first chuck rotates synchronously during the rotational motion. While the two gears under test are meshing and rotating, the CCD vision inspection module continuously captures dynamic images of the gear meshing area at a high frequency. The image processing algorithm analyzes the changes in the relative position of the tooth surface in real time, thereby calculating the value of the tooth flank clearance. S103: The second vertical shaft synchronously drives the main roller cleaning groove structure to rotate, and the first vertical shaft synchronously drives the auxiliary roller cleaning groove structure to rotate. The cleaning elements of the main roller cleaning groove structure and the auxiliary roller cleaning groove structure continuously sweep across the tooth surface and tooth root area of ​​the gear during the rotation process, effectively scraping away the tiny debris and burrs that fall off the gear during the relative rotation process. S104: After the detection program is completed, the rotary drive module stops, the gear stops rotating, the CCD vision inspection module completes image acquisition and data processing, and finally obtains the gap measurement result. Then, the dual-axis adjustment module is operated again to disengage the first vertical shaft and the gear on it from the meshing position, and then the two gears that have completed the inspection are removed.

[0015] The present invention, by adopting the above technical solution, has at least the following beneficial effects: 1. In this invention, one of the gears to be tested is fixed at the top of the second vertical shaft by a second chuck. The dual-shaft adjustment module adjusts the position of the first chuck and the other gear to be tested it holds until the two gears are in good meshing. The control panel commands the rotary drive module to drive the second vertical shaft to rotate, thereby causing the two gears to rotate. At the same time, the CCD vision inspection module performs gear clearance detection. During the inspection, the main roller cleaning groove structure and the auxiliary roller cleaning groove structure also use the rotational power of the rotary drive module to clean the debris generated by the gear meshing and rotation. Thus, the power of the rotary drive module drives the main and auxiliary roller cleaning groove structures to work through mechanical transmission, eliminating the dependence on external air source or independent compressor, directly saving the initial cost of purchasing corresponding pneumatic components and their installation and debugging, and eliminating the corresponding power consumption and subsequent periodic replacement expenses of consumables such as filters, thereby significantly reducing the operating cost of the device.

[0016] 2. In terms of physical space, the main and auxiliary roller cleaning groove structures are more compactly integrated near the gear meshing area, eliminating the need to reserve space for a large air pipeline network. This makes the layout of the entire detection device simpler and more compact, and easier to deploy and integrate on automated production lines. At the same time, the main and auxiliary roller cleaning groove structures rotate and brush by directly contacting or closely adhering to the gear tooth surface. For oil stains, flocculent matter, or slightly larger debris particles with strong adhesion, the physical scraping cleaning effect is more certain and thorough than airflow cleaning. Especially for heavy gears or gears with a lot of cutting residue, the cleaning process is concentrated on the gear meshing area, unlike disordered airflow which blows debris to other corners of the equipment or camera lenses, avoiding secondary pollution and ensuring the clarity and accuracy of the CCD vision inspection module's field of view during the inspection process. Attached Figure Description

[0017] Figure 1 The three-dimensional representation of the overall structure in the embodiments of the present invention Figure 1 ; Figure 2 The three-dimensional representation of the overall structure in the embodiments of the present invention Figure 2 ; Figure 3 The three-dimensional representation of the overall structure in the embodiments of the present invention Figure 3 ; Figure 4 This is a three-dimensional sectional view of the overall structure in an embodiment of the present invention; Figure 5 This is a front sectional view of the overall structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the rotation drive module in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the auxiliary roller cleaning groove in an embodiment of the present invention; Figure 8 for Figure 7 A magnified view of a portion of point A in the middle.

[0018] In the diagram: 1-Inspection table; 2-Top plate; 3-CCD vision inspection module; 4-Side plate; 401-Shaft platform; 402-Hollow shaft cylinder; 5-Dual-axis adjustment module; 501-Screw lifting module; 502-Hanging frame; 5021-Rectangular opening; 503-Automatic telescopic rod; 504-L-shaped platform; 6-First vertical shaft; 7-Chuck No. 1; 8-Second vertical shaft; 9-Chuck No. 2; 10-Main position roller cleaning groove Structure; 1001-Vertical bevel gear shaft; 1002-Synchronous belt drive assembly; 1003-Pangle plate; 1004-Driven bevel gear shaft; 1005-Second brush roller; 11-Subsidiary roller cleaning groove structure; 1101-Side gear shaft; 1102-Drive gear disc; 1103-First brush roller; 12-Rotary drive module; 1201-Servo motor; 1202-Circular grating encoder; 13-Control panel. Detailed Implementation

[0019] like Figures 1 to 4 As shown, a gear backlash detection device includes a detection platform 1. A top plate 2 is fixedly installed on the top of the detection platform 1 by four columns. A CCD vision inspection module 3 is slidably installed on the bottom of the top plate 2 by two rails. The detection platform 1, the four columns and the top plate 2 serve as the mechanical foundation and load-bearing platform of the entire device, providing a high-rigidity and high-stability reference surface to ensure that all precision components can maintain a precise relative positional relationship for a long time.

[0020] In this embodiment, the CCD vision inspection module 3 is slidably mounted on the top plate 2 via two tracks. The operator can adjust the position of the CCD vision inspection module 3 on the two tracks according to the meshing position of the two gears to ensure that the meshing position of the gears is within the field of view of the CCD vision inspection module 3, thereby improving its usability.

[0021] A dual-axis adjustment module 5 is installed on one side of the top of the testing platform 1. A first vertical shaft 6 is rotatably installed on the drive end of the dual-axis adjustment module 5, and a first chuck 7 is fixedly installed on the top of the first vertical shaft 6. A secondary position roller cleaning groove structure 11, which is connected to the first vertical shaft 6, is installed at the drive end of the dual-axis adjustment module 5 on one side of the first chuck 7. The secondary position roller cleaning groove structure 11 is used to clean the gear tooth surface fixed by the first chuck 7. A second vertical shaft 8 is rotatably installed on the other side of the top of the testing platform 1. A second chuck 9 is fixedly installed on the top of the second vertical shaft 8. A main position roller cleaning groove structure 10, which is connected to the second vertical shaft 8, is provided on the side of the second chuck 9 away from the first chuck 7. The main position roller cleaning groove structure 10 is used to clean the gear tooth surface fixed by the second chuck 9. A rotary drive module 12 for driving the second vertical shaft 8 to rotate is installed on one side of the bottom of the testing platform 1.

[0022] A control panel 13 is installed on one side of the top of the inspection table 1. The control output terminal of the control panel 13 is electrically connected to the control input terminal of the dual-axis adjustment module 5 and the rotation drive module 12, respectively. The signal input terminal of the control panel 13 is communicatively connected to the signal output terminal of the CCD vision inspection module 3.

[0023] like Figure 5 and Figure 6 As shown, the dual-axis adjustment module 5 includes a screw lifting module 501 fixedly installed on one side of the top of the detection table 1. A hanging frame 502 is installed on the drive end of the screw lifting module 501. An L-shaped platform 504 is slidably installed on the hanging frame 502 in the horizontal direction. An automatic telescopic rod 503 is installed on the outer wall of the hanging frame 502 near the screw lifting module 501. The telescopic end of the automatic telescopic rod 503 is fixedly connected to the outer wall of the L-shaped platform 504.

[0024] The top of the hanging frame 502 is provided with a rectangular opening 5021 for the first vertical shaft 6 to slide horizontally; the first vertical shaft 6 is located in the middle of the rectangular opening 5021, and the lower end of the first vertical shaft 6 extends to the bottom of the hanging frame 502 and is rotatably connected to the top of the L-shaped platform 504; the design of the rectangular opening 5021 provides the first vertical shaft 6 with a space for horizontal movement.

[0025] When the dual-axis adjustment module 5 is in operation, the operator controls the screw lifting module 501 and the automatic telescopic rod 503 through the control panel 13. The screw lifting module 501 is used to control the vertical position of the lifting frame 502, and the automatic telescopic rod 503 is used to control the horizontal position of the L-shaped platform 504, so that the first vertical shaft 6, the first chuck 7 and the clamped gear can move closer to or further away from the second chuck 9, adjusting the position between the gear on the first chuck 7 and the gear on the second chuck 9, thereby adjusting the meshing position of the two gears, so that the two gears can mesh precisely and improve the performance.

[0026] In this embodiment, the automatic telescopic rod 503 is one of a hydraulic cylinder, a telescopic cylinder, or an electric telescopic rod. When the automatic telescopic rod 503 is activated, its telescopic end extends to drive the L-shaped platform 504 to move horizontally on the hanging frame 502, thereby adjusting the horizontal position of the first vertical shaft 6, the first chuck 7, and the clamping gear.

[0027] The rotary drive module 12 includes a servo motor 1201 installed at the bottom of the inspection table 1 and a side plate 4 fixed on the other side of the top of the inspection table 1. A shaft base 401 is fixed on the outer wall of the side plate 4 near the second vertical shaft 8. A bearing seat for supporting the rotation of the second vertical shaft 8 is fixedly installed on the outer wall of the shaft base 401. The upper end of the power output shaft of the servo motor 1201 is connected to the lower end of the second vertical shaft 8 through a coupling. The control input terminal of the servo motor 1201 is electrically connected to the control output terminal of the control panel 13.

[0028] The control panel 13 outputs control signals to instruct the servo motor 1201 to work in the set rotation direction, speed, angle and start / stop response time. At this time, the servo motor 1201 drives the second vertical shaft 8 to rotate, which is convenient to use.

[0029] A circular grating encoder 1202 for detecting the rotational position of the output shaft of the servo motor 1201 is also installed on the outer wall of the shaft 401 away from the side plate 4. The signal output terminal of the circular grating encoder 1202 is electrically connected to the signal input terminal of the control panel 13.

[0030] In this embodiment, the servo motor 1201 in the rotary drive module 12 drives the second vertical shaft 8 and the second chuck 9 to rotate through the coupling. During this process, the circular grating encoder 1202 realizes direct, high-resolution, and fully closed-loop feedback of the rotation angle and position of the output shaft of the servo motor 1201, so that when the servo motor 1201 rotates to each specific and precise micro-angle, it sends acquisition signals to the control panel 13 and the CCD vision inspection module 3.

[0031] like Figure 7 and Figure 8 As shown, the main roller cleaning groove structure 10 is set on one side of the outer wall of the shaft platform 401; the main roller cleaning groove structure 10 includes a hollow shaft cylinder 402 fixed on one side of the outer wall of the shaft platform 401, a vertical bevel gear shaft 1001 is vertically rotatably installed inside the hollow shaft cylinder 402, a convex plate 1003 is fixedly installed at the top of the shaft platform 401, a synchronous belt drive assembly 1002 is installed between the vertical bevel gear shaft 1001 and the second vertical shaft 8, a driven bevel gear shaft 1004 is rotatably installed on the convex plate 1003 through ball bearings, a second brush roller 1005 is detachably installed at one end of the driven bevel gear shaft 1004, the second brush roller 1005 is in contact with the gear clamped on the second chuck 9, and the other end of the driven bevel gear shaft 1004 is meshed with the upper end of the vertical bevel gear shaft 1001.

[0032] In this design, the vertical bevel gear shaft 1001 in the hollow shaft cylinder 402 is connected to the second vertical shaft 8 and the second chuck 9 via the synchronous belt drive assembly 1002. The rotation of the second vertical shaft 8 drives the main roller cleaning groove structure 10 to work. At this time, the upper end of the vertical bevel gear shaft 1001 drives the second brush roller 1005 to rotate via the driven bevel gear shaft 1004. The rotation of the second brush roller 1005 is used to continuously clean the debris on the gear clamped on the second chuck 9, reducing the interference of contaminants on visual inspection.

[0033] The auxiliary roller cleaning groove structure 11 includes a side gear shaft 1101 rotatably mounted on the top of the hanging frame 502. A first brush roller 1103 is detachably mounted on the upper end of the side gear shaft 1101. An active gear disk 1102 is fixedly mounted on the outer wall of the first vertical shaft 6. The active gear disk 1102 meshes with the side gear shaft 1101.

[0034] With this design, the active gear disk 1102 meshes with the side gear shaft 1101. The rotation of the first vertical shaft 6 drives the side gear shaft 1101 to rotate, and the side gear shaft 1101 drives the first brush roller 1103 to rotate. During this process, the first brush roller 1103 rotates in the opposite direction to the rotation of the first chuck 7, thereby synchronously cleaning the tooth surface of the gear clamped on the first chuck 7, ensuring the cleanliness of the meshing area of ​​the two gears, and further reducing misjudgment caused by debris interference.

[0035] The outer wall of the side gear shaft 1101 is integrally formed with a protruding key at the upper position, and the lower end surface of the first brush roller 1103 is provided with a groove for interference fit with the protruding key.

[0036] The first brush roller 1103 is replaceable by means of grooves and protrusions, so that the first brush roller 1103 with different brush lengths can be used according to the gear specifications.

[0037] In this embodiment, the control panel 13 is a prior art technology. Its specific structure includes a main controller and a touch screen. The touch screen is communicatively connected to the main controller. The main controller is used to output control signals or receive feedback and detection signals. The touch screen is used to input debugging control parameters or display control operation parameters.

[0038] In this embodiment, the image acquisition device in the CCD vision inspection module 3 adopts a CCD vision camera, and the CCD vision inspection module 3 continuously captures dynamic images of the gear meshing area at a high frequency. The changes in the relative position of the tooth surface are analyzed in real time through the image processing algorithm, thereby calculating the value of the tooth flank clearance. The image processing algorithm is existing technology and can be purchased directly from the market, so it will not be described in detail here.

[0039] In this embodiment, the cleaning elements of the main roller cleaning groove structure 10 and the secondary roller cleaning groove structure 11 continuously sweep across the tooth surface and tooth root area of ​​the gear during rotation. Dust may be generated during the cleaning process, and the dust may fall on the optical lens of the CCD vision inspection module 3, affecting the image acquisition effect. In this embodiment, the optical lens can be cleaned and maintained regularly according to the contamination status of the optical lens in the CCD vision inspection module 3, without the need for high-intensity labor, thus improving the usage effect.

[0040] The present invention also provides a method for detecting gear backlash, using the aforementioned gear backlash detection device, comprising the following steps: S101: Securely clamp the two gears to be tested onto chuck 7 and chuck 9. After clamping, the operator starts the dual-axis adjustment module 5 via control panel 13. The dual-axis adjustment module 5 drives the first vertical shaft 6 and the chuck 7 and gear on it to move in the horizontal plane to gradually approach the other gear fixed by chuck 9. The operator makes fine adjustments until the tooth profiles of the two gears mesh correctly at the predetermined depth.

[0041] The working principle of the dual-axis adjustment module 5 in step S101 is as follows: The operator controls the screw lifting module 501 and the automatic telescopic rod 503 through the control panel 13. When the screw lifting module 501 is activated, it drives the lifting frame 502 to move vertically up and down through the drive end, thereby adjusting the vertical position of the lifting frame 502, and thus adjusting the vertical position of the first vertical shaft 6, the first chuck 7, and the clamped gear. When the automatic telescopic rod 503 is activated, it controls the horizontal position of the L-shaped platform 504, so that the first vertical shaft 6, the first chuck 7, and the clamped gear can move closer to or further away from the second chuck 9, adjusting the position between the gear on the first chuck 7 and the gear on the second chuck 9, thereby adjusting the meshing position of the two gears, so that the two gears can mesh precisely and improve the performance.

[0042] S102: After the meshing state is debugged, the rotary drive module 12 is turned on through the control panel 13. The rotary drive module 12 directly drives the second vertical shaft 8, together with the second chuck 9 and the gear on it, to rotate slowly and smoothly. The gear fixed by the first chuck 7 rotates synchronously with the rotation. While the two gears under test are meshing and rotating, the CCD vision inspection module 3 continuously captures dynamic images of the gear meshing area at high frequency. The image processing algorithm analyzes the changes in the relative position of the tooth surface in real time, thereby calculating the value of the tooth flank clearance.

[0043] The working principle of the rotary drive module 12 in step S102 is as follows: the servo motor 1201 in the rotary drive module 12 drives the second vertical shaft 8 and the second chuck 9 to rotate through the coupling. During this process, the circular grating encoder 1202 realizes direct, high-resolution, and fully closed-loop feedback of the rotation angle and position of the output shaft of the servo motor 1201, so that when the servo motor 1201 rotates to each specific and precise micro angle, it sends acquisition signals to the control panel 13 and the CCD vision inspection module 3.

[0044] S103: The second vertical shaft 8 synchronously drives the main roller cleaning groove structure 10 to rotate, and the first vertical shaft 6 synchronously drives the auxiliary roller cleaning groove structure 11 to rotate. The cleaning elements of the main roller cleaning groove structure 10 and the auxiliary roller cleaning groove structure 11 continuously sweep across the tooth surface and tooth root area of ​​the gear during rotation, effectively scraping away the tiny debris and burrs that fall off the gear during relative rotation.

[0045] The working principle of the main roller cleaning groove structure 10 in step S103 is as follows: the rotation of the second vertical shaft 8 drives the vertical bevel gear shaft 1001 to rotate through the synchronous belt transmission assembly 1002. At this time, the upper end of the vertical bevel gear shaft 1001 drives the second brush roller 1005 to rotate through the driven bevel gear shaft 1004. The rotation of the second brush roller 1005 is used to continuously clean the debris on the gear clamped on the second chuck 9, reducing the interference of pollutants on visual inspection.

[0046] The working principle of the auxiliary roller cleaning groove structure 11 in step S103 is as follows: the rotation of the first vertical shaft 6 drives the side gear shaft 1101 to rotate through the active gear disk 1102. The side gear shaft 1101 drives the first brush roller 1103 to rotate. During this process, the rotation direction of the first brush roller 1103 is opposite to that of the first chuck 7, thereby synchronously cleaning the tooth surface of the gear clamped on the first chuck 7, ensuring the cleanliness of the meshing area of ​​the two gears, and further reducing misjudgment caused by debris interference.

[0047] S104: After the detection program is completed, the rotary drive module 12 stops, the gear stops rotating, the CCD vision detection module 3 completes image acquisition and data processing, and finally obtains the gap measurement result. The gap measurement result is displayed on the screen of the control panel 13. Then, the dual-axis adjustment module 5 is operated again to disengage the first vertical shaft 6 and the gear on it from the meshing position, and then the two gears that have completed the detection are removed.

[0048] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A gear backlash detection device, comprising a detection platform (1), a top plate (2) fixedly mounted on the top of the detection platform (1) by four columns, and a CCD vision inspection module (3) slidably mounted on the bottom of the top plate (2) by two rails, characterized in that: A dual-axis adjustment module (5) is installed on one side of the top of the testing table (1). A first vertical shaft (6) is rotatably installed on the drive end of the dual-axis adjustment module (5), and a No. 1 chuck (7) is fixedly installed on the top of the first vertical shaft (6). A secondary position roller cleaning groove structure (11) that maintains a transmission connection with the first vertical shaft (6) is installed at the drive end position of the dual-axis adjustment module (5) on one side of the No. 1 chuck (7). The secondary position roller cleaning groove structure (11) is used to clean the gear tooth surface fixed by the No. 1 chuck (7). (1) A second vertical shaft (8) is rotatably installed on the other side of the top. A second chuck (9) is fixedly installed on the top of the second vertical shaft (8). A main position roller cleaning groove structure (10) is provided on the side of the second chuck (9) away from the first chuck (7) to maintain a transmission connection with the second vertical shaft (8). The main position roller cleaning groove structure (10) is used to clean the gear tooth surface fixed by the second chuck (9). A rotary drive module (12) for driving the second vertical shaft (8) to rotate is installed on one side of the bottom of the inspection table (1).

2. The gear backlash detection device according to claim 1, characterized in that: A control panel (13) is installed on one side of the top of the inspection table (1). The control output terminal of the control panel (13) is electrically connected to the control input terminal of the dual-axis adjustment module (5) and the rotation drive module (12), respectively. The signal input terminal of the control panel (13) is connected to the signal output terminal of the CCD vision inspection module (3).

3. The gear backlash detection device according to claim 2, characterized in that: The dual-axis adjustment module (5) includes a screw lifting module (501) fixedly installed on one side of the top of the detection table (1). A hanging frame (502) is installed on the drive end of the screw lifting module (501). An L-shaped platform (504) is slidably installed on the hanging frame (502) in the horizontal direction. An automatic telescopic rod (503) is installed on the outer wall of the hanging frame (502) near the screw lifting module (501). The telescopic end of the automatic telescopic rod (503) is fixedly connected to the outer wall of one side of the L-shaped platform (504).

4. The gear backlash detection device according to claim 3, characterized in that: The top of the hanging frame (502) is provided with a rectangular opening (5021) for the first vertical shaft (6) to slide in the horizontal direction; the first vertical shaft (6) is located in the middle of the rectangular opening (5021), and the lower end of the first vertical shaft (6) extends to the bottom of the hanging frame (502) and is rotatably connected to the top of the L-shaped platform (504).

5. A gear backlash detection device according to claim 4, characterized in that: The rotary drive module (12) includes a servo motor (1201) installed at the bottom of the test table (1) and a side plate (4) fixed on the other side of the top of the test table (1). A shaft platform (401) is fixed on the outer wall of the side plate (4) near the second vertical shaft (8). A bearing seat for supporting the second vertical shaft (8) to rotate is fixed on the outer wall of the shaft platform (401). The upper end of the power output shaft of the servo motor (1201) is connected to the lower end of the second vertical shaft (8) for transmission. The control input end of the servo motor (1201) is electrically connected to the control output end of the control panel (13).

6. The gear backlash detection device according to claim 5, characterized in that: On the outer wall of the shaft platform (401) away from the side plate (4), a circular grating encoder (1202) for detecting the rotational position of the output shaft of the servo motor (1201) is also installed. The signal output end of the circular grating encoder (1202) is electrically connected to the signal input end of the control panel (13).

7. A gear backlash detection device according to claim 6, characterized in that: The main roller cleaning groove structure (10) is set on one side of the outer wall of the shaft platform (401); the main roller cleaning groove structure (10) includes a hollow shaft cylinder (402) fixed on one side of the outer wall of the shaft platform (401), a vertical bevel gear shaft (1001) is vertically rotatably installed inside the hollow shaft cylinder (402), a convex plate (1003) is fixedly installed at the top of the shaft platform (401), a synchronous belt drive assembly (1002) is installed between the vertical bevel gear shaft (1001) and the second vertical shaft (8), a driven bevel gear shaft (1004) is rotatably installed on the convex plate (1003), a second brush roller (1005) is detachably installed at one end of the driven bevel gear shaft (1004), and the other end of the driven bevel gear shaft (1004) is meshed with the upper end of the vertical bevel gear shaft (1001).

8. A gear backlash detection device according to claim 7, characterized in that: The auxiliary roller cleaning groove structure (11) includes a side gear shaft (1101) rotatably mounted on the top of the hanging frame (502), a first brush roller (1103) is detachably mounted on the upper end of the side gear shaft (1101), and an active gear disk (1102) is fixedly mounted on the outer wall of the first vertical shaft (6), and the active gear disk (1102) meshes with the side gear shaft (1101).

9. A gear backlash detection device according to claim 8, characterized in that: The outer wall of the side gear shaft (1101) is integrally formed with a protruding key at the upper position, and the lower end surface of the first brush roller (1103) is provided with a groove for interference fit with the protruding key.

10. A method for detecting gear backlash, using the gear backlash detection device as described in any one of claims 1-9, characterized in that: Includes the following steps: S101: Securely clamp the two gears to be tested onto chuck No. 1 (7) and chuck No. 2 (9). After clamping, the operator starts the dual-axis adjustment module (5). The dual-axis adjustment module (5) drives the first vertical shaft (6) and its chuck No. 1 (7) and gear to move in the horizontal plane to gradually approach the other gear fixed by chuck No. 2 (9). The operator makes fine adjustments until the tooth profiles of the two gears mesh correctly at the predetermined depth. S102: After the meshing state is debugged, the rotary drive module (12) is turned on to drive the second vertical shaft (8) together with the second chuck (9) and gear on it to rotate slowly and smoothly. The gear fixed by the first chuck (7) rotates synchronously during the rotational motion. While the two gears under test are meshing and rotating, the CCD vision detection module (3) continuously captures dynamic images of the gear meshing area at high frequency. The image processing algorithm is used to analyze the changes in the relative position of the tooth surface in real time, thereby calculating the value of the tooth side clearance. S103: The second vertical shaft (8) synchronously drives the main roller cleaning groove structure (10) to rotate, and the first vertical shaft (6) synchronously drives the secondary roller cleaning groove structure (11) to rotate. The cleaning elements of the main roller cleaning groove structure (10) and the secondary roller cleaning groove structure (11) continuously sweep across the tooth surface and tooth root area of ​​the gear during the rotation process, effectively scraping away the tiny debris and burrs that fall off the gear during the relative rotation process. S104: After the detection program is completed, the rotary drive module (12) stops, the gear stops rotating, the CCD vision detection module (3) completes image acquisition and data processing, and finally obtains the gap measurement result. Then, the dual-axis adjustment module (5) is operated again to disengage the first vertical shaft (6) and the gear on it from the meshing position, and then the two gears that have been detected are removed.

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