Automatic worm gear comprehensive monitor

Abstract

The present application relates to detection equipment technical field, especially to a kind of automatic worm comprehensive monitoring appearance, including worm positioning unit, worm gear cooperation unit, industrial control driving unit, worm detection analysis unit and detection feedback unit.The present application is analyzed the rim roundness of the worm to be measured by detecting the meshing data of the tooth surface of the worm to be measured and worm in meshing rotation process and the coaxiality of the corresponding center of the worm shaft hole and rim of the worm to be measured, the tooth profile precision of the worm to be measured and the worm disc uniformity, and the angle deviation amount of the worm rotation angle and the worm rotation angle in the meshing rotation process of the worm to be measured and worm, to determine the tooth surface quality parameter of the worm to be measured.The present application can comprehensively detect the quality condition of worm, help to find the defect or problem possibly existing in the manufacture or assembly of worm in early stage, improve the quality and reliability of product.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to an automatic worm gear integrated monitoring instrument. Background Technology

[0002] The worm gear comprehensive monitoring instrument is a highly advanced device designed to assess the operating status and performance of worm gear machinery (such as worm gear generators and worm gear compressors) at an early stage. Its background technology is based on the integration of sensor, data acquisition, and analysis technologies. It utilizes multiple sensors (such as vibration sensors, temperature sensors, and pressure sensors) to collect key parameters during worm gear operation and employs advanced data analysis algorithms and models to achieve comprehensive worm gear monitoring. This monitoring instrument helps identify potential problems with the worm gear, predict failure trends, optimize maintenance plans, and improve the reliability, safety, and efficiency of the equipment, thereby reducing downtime and maintenance costs for equipment containing worm gears.

[0003] Chinese Patent Publication No. CN107101556B discloses an automatic worm gear inspection machine. This invention uses a vibratory feeder to transport the worm gear to be tested onto a conveyor belt. Then, a test-product moving device moves the worm gear from the conveyor belt to a support platform. The worm gear then passes sequentially through a worm gear end face inspection device, a worm gear flipping device, a first aperture measuring device, a second aperture measuring device, a dimension D measuring device, a worm gear thickness measuring device, and a ball span measuring device to automatically inspect the worm gear. A defective product rejection device located to the right of the remaining measuring devices (except for the first aperture measuring device) pushes defective products off the support platform and into a defective product collection box. Qualified products finally fall into a good product collection box. This achieves automatic inspection of the worm gear, thereby improving efficiency, reducing the probability of errors, and saving labor. However, this invention does not consider the problem of simultaneously inspecting different parts of the worm gear during the same inspection process, leading to low inspection efficiency. Summary of the Invention

[0004] Therefore, the present invention provides an automatic worm gear comprehensive monitoring instrument to overcome the problem of low worm gear detection efficiency caused by the complexity of existing worm gear detection instruments.

[0005] To achieve the above objectives, the present invention provides an automatic worm gear comprehensive monitoring instrument, comprising: a worm gear positioning unit for fixing the worm gear to be tested onto the base of the monitoring instrument; a worm gear mating unit connected to the worm gear positioning unit for mating with the worm gear positioning unit to determine the tooth surface quality parameters of the worm gear to be tested based on the meshing data of the worm gear meshing with the worm gear to be tested; an industrial control drive unit connected to both the worm gear positioning unit and the worm gear mating unit for driving the worm gear on the worm gear positioning unit to move via a drive cylinder to make the worm gear to be tested contact with the worm gear, and for controlling a servo motor to drive the worm gear to rotate and mesh with the tooth surface of the worm gear to be tested; and a worm gear detection and analysis unit connected to the worm gear positioning unit for detecting the tooth surface of the worm gear to be tested and the worm gear. The meshing data during the meshing rotation process is used to analyze the rim roundness of the worm gear under test, the coaxiality of the worm gear shaft hole and the corresponding center of the rim, the tooth surface profile accuracy and worm gear disk uniformity of the worm gear under test, and the angular deviation between the worm gear rotation angle and the worm gear rotation angle during the meshing rotation process of the worm gear under test and the worm. A detection feedback unit, connected to both the industrial control drive unit and the worm gear detection and analysis unit, is used to visualize the set parameters of the industrial control drive unit and the tooth surface quality parameters of the worm gear under test detected by the worm gear detection and analysis unit. The tooth surface quality parameters include the rim roundness, the coaxiality, the tooth surface profile accuracy, the worm gear tooth uniformity, and the worm gear disk uniformity, with the worm gear tooth uniformity determined by the angular deviation.

[0006] Furthermore, the worm gear positioning unit includes a compression spring device, a slide table, and a rotating shaft. The compression spring device is used to determine the contact and meshing between the tooth surface of the worm gear to be tested and the worm, and includes a compression spring, a compression spring adjusting bolt, and a compression spring positioning pin. The compression spring positioning pin is mounted on the base of the monitoring instrument, and its upper end has a circular through hole parallel to the plane of the base, allowing the compression spring adjusting bolt to move along the through direction of the circular through hole. One end of the compression spring adjusting bolt passes through the circular through hole at the upper end of the compression spring positioning pin and is slidably connected to the circular through hole; the other end is fixedly connected to the slide table. The compression spring is sleeved on the compression spring adjusting bolt and located between the compression spring positioning pin and the slide table. The side of the slide table away from the worm is fixedly connected to the compression spring adjusting bolt, and the upper surface of the slide table has a rotating shaft perpendicular to the slide table for fixing the worm gear to be tested. The rotating shaft is perpendicular to both the upper surface of the slide table and the plane of the base, and is used to fix the worm gear to be tested on the slide table through the shaft hole of the worm gear to be tested.

[0007] Further, the worm gear detection and analysis unit includes a linear guide rail, a displacement slider, a displacement detector, a pressure sensor, a first angle sensor, and a second angle sensor; the linear guide rail is mounted on the base and includes a first linear guide rail and a second linear guide rail. The first linear guide rail is located behind the compression spring positioning post, and the second linear guide rail is located in front of the compression spring positioning post. The first and second linear guide rails are parallel and both perpendicular to the compression spring positioning post; the displacement slider includes a first displacement slider and a second displacement slider slidably disposed on the first linear guide rail, and a third displacement slider and a fourth displacement slider slidably disposed on the second linear guide rail; wherein, the The lengths of the first and second linear guides are both the same as the length of the base in the sliding direction of the track; the displacement detector is connected to the slide table and is used to detect the displacement or displacement change of the slide table in the linear guide direction during the meshing transmission of the worm gear and worm; the pressure sensor is set on the lower end face of any displacement slider and is used to measure the pressure or pressure change acting on the displacement slider when the worm gear rotates; the first angle sensor is set on the rotating shaft and is used to detect the rotation angle of the worm gear during the meshing rotation of the worm gear and worm; the second angle sensor is connected to the worm and is used to detect the rotation angle of the worm during the meshing rotation of the worm gear and worm.

[0008] Furthermore, the worm gear engagement unit includes a worm, a bearing bracket, and a bearing; the worm is perpendicular to the rotating shaft and parallel to the base, used to drive the worm gear under test to rotate around the worm gear shaft hole by meshing with the worm gear under test; the bearing bracket is fixedly connected to the base and includes a first bearing bracket and a second bearing bracket, the first bearing bracket is located on the rear side of the first linear guide rail and away from the compression spring positioning post, the second bearing bracket is located on the front side of the second linear guide rail and away from the compression spring positioning post, the first bearing bracket and the second bearing bracket are respectively provided with a first bearing sleeve and a second bearing sleeve of the same height on opposite sides, the first bearing sleeve is located on the first bearing bracket, and the second bearing sleeve is located on the second bearing bracket; the first bearing sleeve is provided with a first bearing, the second bearing sleeve is provided with a second bearing, the first bearing and the second bearing are respectively connected to both ends of the worm for mounting the worm.

[0009] Furthermore, the industrial control drive unit includes a servo motor, a cylinder, and an industrial control component; the servo motor is used to drive the worm to rotate so that the worm meshes with the tooth surface of the worm wheel to be tested, and to drive the cylinder to push the slide table to move along the sliding direction of the linear guide rail; the industrial control component is connected to the servo motor and is used to control the servo motor to output driving force to control the worm to rotate, control the cylinder to push the slide table to overcome the elastic force of the compression spring so that the slide table is displaced in the direction of the compression spring positioning post to leave installation space for the worm wheel to be tested, and control the cylinder to push the slide table to displace in the direction of the bearing bracket so that the worm wheel to be tested contacts and meshes with the worm.

[0010] Furthermore, the worm gear mating unit also includes a worm gear coloring device, which includes a color supply assembly, a coloring arm, and a coloring head. The color supply assembly is installed on the side of the first bearing bracket away from the worm gear and is used to load colored colorant and deliver it to the coloring head. One end of the coloring arm is fixedly installed on the side of the first bearing bracket away from the slide table, and the other end of the coloring arm is connected to the coloring head for mounting the coloring head so that the coloring head evenly supplies colorant to the tooth surface of the worm gear so that the tooth surface of the worm gear under test is coated with colorant during the meshing process with the tooth surface of the worm gear under test when the worm gear under test rotates.

[0011] Furthermore, the worm gear detection and analysis unit determines the cause of the error offset based on the fluctuation period of the error offset trend, including: when the fluctuation period of the trend is within a preset period range, the worm gear detection and analysis unit determines that the error offset includes the coaxiality error between the center of the worm gear shaft hole and the rim of the worm gear under test; wherein, the error offset is the displacement of the slide table during the meshing rotation of the worm gear tooth surface and the worm, the fluctuation period of the trend is the angle between the maximum and minimum values ​​of the slide table displacement corresponding to the positions on the worm gear under test, and the preset period is an angle interval including 180°.

[0012] Furthermore, the worm gear detection and analysis unit determines the tooth surface profile accuracy of the worm gear under test based on the coloring area and coloring position of the colorant on the tooth surface of the worm gear under test.

[0013] Furthermore, the worm gear detection and analysis unit determines whether the tooth height of the worm gear under test meets the standard based on the colored area and the error offset.

[0014] Furthermore, the rotating shaft also includes a rotating shaft eccentric assembly for adjusting the distance between the shaft center and the shaft hole of the worm gear to be tested, including an eccentric slider and a clamping part; the eccentric slider is disposed on the side surface of the rotating shaft to eliminate the coaxiality error between the worm gear shaft hole of the worm gear to be tested and the center of the circle corresponding to its rim; the clamping part is disposed on the rotating shaft to fix the relative position of the rotating shaft and the worm gear to be tested when the rotating shaft drives the worm gear to be tested to rotate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The automatic worm gear monitor provided by the present invention, through the close cooperation of the worm gear positioning unit and the worm gear mating unit, can stably fix the worm gear under test and accurately obtain the tooth surface quality parameters of the worm gear; the industrial control drive unit, through the coordinated action of the drive cylinder and the servo motor, realizes precise control of the precise contact and meshing process between the worm gear and the worm, thereby ensuring the accuracy and reliability of the monitoring; the worm gear detection and analysis unit determines the error offset of the worm gear shaft hole and the tooth surface of each tooth of the worm gear rim by real-time monitoring of the displacement change of the slide on the linear guide rail, and also detects the tooth surface profile accuracy, tooth uniformity and rotation angle deviation of the worm gear, comprehensively reflecting the quality status of the worm gear, which helps to detect possible defects or problems in the manufacturing or assembly of the worm gear at an early stage, and improves the quality and reliability of the product.

[0016] Furthermore, the detection feedback unit in the automatic worm gear comprehensive monitoring instrument provided by the present invention enables the monitoring instrument to visualize the setting parameters of the industrial control drive unit and the quality parameters of the worm gear tooth surface, so that the operator can intuitively understand the monitoring results, so that the staff can understand whether the worm gear under test has defects, what kind of defects exist, where the defects are located on the gear, and how to improve the defects, and adjust and optimize the defective worm gear in a timely manner.

[0017] Furthermore, the automatic worm gear comprehensive testing instrument provided by this invention integrates the detection of multiple key parameters such as error offset, tooth surface profile accuracy, worm gear tooth uniformity, and worm gear disk uniformity. This automatic worm gear comprehensive monitoring instrument provides the worm gear manufacturing industry with an efficient and accurate quality control method, ensuring the stability and reliability of worm gear performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention;

[0019] Figure 2 This is a top view of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention;

[0020] Figure 3 This is a left view of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention;

[0021] Figure 4This is a front view of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the rotating shaft and eccentric slider in an embodiment of the present invention;

[0023] In the diagram: 1, spring adjusting bolt; 2, spring positioning pin; 3, spring; 41, first displacement slider; 43, third displacement slider; 44, fourth displacement slider; 5, slide table; 6, rotating shaft; 7, worm gear to be tested; 8, servo motor; 9, industrial control component; 101, first bearing bracket; 102, second bearing bracket; 11, worm; 12, bearing; 13, cylinder; 141, first linear guide; 142, second linear guide; 15, display screen; 16, eccentric slider; 17, shaft hole. Detailed Implementation

[0024] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0027] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] Please see Figure 1The diagram shown is a structural schematic of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention. The present invention provides an automatic worm gear comprehensive monitoring instrument, comprising: a worm gear positioning unit for fixing the worm gear 7 to be tested onto the base of the monitoring instrument; a worm 11 mating unit connected to the worm gear positioning unit for mating with the worm gear positioning unit to determine the tooth surface quality parameters of the worm gear 7 to be tested based on the meshing data of the worm 11 meshing with the worm gear 7; an industrial control drive unit connected to both the worm gear positioning unit and the worm 11 mating unit, for driving the worm 11 on the worm gear positioning unit to move via a drive cylinder 13 so that the worm gear 7 to be tested contacts the worm 11, and controlling the servo motor 8 to drive the worm 11 to rotate and mesh with the tooth surface of the worm gear 7 to be tested; and a worm gear detection and analysis unit connected to the worm gear positioning unit for detecting the tooth surface of the worm gear 7 to be tested and the meshing data of the worm 11 meshing with the worm gear 7. The meshing data of rod 11 during meshing rotation is used to analyze the rim roundness and coaxiality of the worm wheel shaft hole and the corresponding center of the rim, the tooth surface profile accuracy and worm wheel disk uniformity of the worm wheel 7, and the angular deviation between the worm wheel rotation angle and the worm 11 rotation angle during the meshing rotation of the worm wheel 7 and the worm 11. A detection feedback unit, connected to the industrial control drive unit and the worm wheel detection and analysis unit, is used to visualize the set parameters of the industrial control drive unit and the tooth surface quality parameters of the worm wheel 7 detected by the worm wheel detection and analysis unit. The tooth surface quality parameters include the rim roundness, the coaxiality, the tooth surface profile accuracy, the worm wheel tooth uniformity, and the worm wheel disk uniformity, with the worm wheel tooth uniformity determined by the angular deviation.

[0029] In practice, each tooth of the worm gear 7 meshes with the worm 11, which will push the slide table 5 to a highest point and a lowest point. Assuming that the number of teeth of the worm gear is 41, when the worm gear rotates once, the worm gear detection and analysis unit will collect 41 high point displacement data and 41 low point displacement data.

[0030] Calculate the difference between the maximum and minimum values ​​of each of the above high points and their corresponding circumferential positions, and calculate the difference between the maximum and minimum values ​​of each of the above low points and their corresponding circumferential positions. If the angle between the circumferential positions corresponding to the maximum value R1max and the minimum value R1min of each high point and the line connecting the axis of rotation is 180° or close to 180°, or the angle between the circumferential positions corresponding to the maximum value R2max and the minimum value R2min of each low point and the line connecting the axis of rotation is 180° or close to 180° (generally, it is set to a closed interval of 160° to 200°), it can be determined that the displacement error caused by the worm gear meshing is mainly caused by the coaxiality error between the worm gear shaft hole and the rim.

[0031] If the angle between the circumferential position corresponding to the maximum and minimum values ​​of each high point and the axis of rotation is much greater than or much less than 180° (generally, an open interval greater than 200° or less than 160° is set), or the angle between the circumferential position corresponding to the maximum and minimum values ​​of each low point and the axis of rotation is much greater than or much less than 180°, then the difference between a single high point and its adjacent low point is calculated, resulting in 41 height-low difference values ​​ΔR. Based on the magnitude of the difference ΔR' between the maximum value ΔRmax and the minimum value ΔRmin among these 41 height-low difference values, the error causing displacement in the worm gear meshing can be determined. The causes of the offset include the coaxiality error between the worm gear shaft hole and the rim, and the roundness error of the worm gear rim. Specifically: if △R' < 0.3 × (R1max - R1min) and △R' < 0.3 × (R2max - R2min), it can be determined that the offset error causing displacement during worm gear meshing is mainly due to the coaxiality error between the worm gear shaft hole and the rim; if △R' ≥ 0.3 × (R1max - R1min) or △R' ≥ 0.3 × (R2max - R2min), it can be determined that the offset error causing displacement during worm gear meshing is mainly due to the roundness error of the worm gear rim.

[0032] It is understandable that one rotation of the worm gear 7 corresponds to a data cycle on the slide table 5, which is a 360° rotation of the worm gear (or can be understood as one rotation time of the worm gear). The profile accuracy of the worm gear includes the rim roundness and the tooth surface profile accuracy. The rim roundness is obtained by summing the variances of each high point and each low point. The larger the sum of variances, the lower the rim roundness, and vice versa. The tooth surface profile accuracy is determined by the coloring area and coloring position of the colorant on the tooth surface of the worm gear. The higher the similarity of the profile of the coloring area of ​​each worm gear tooth and the higher the consistency of the coloring position, the higher the tooth surface profile accuracy, and vice versa.

[0033] During implementation, the detection feedback unit visualizes the tooth surface quality parameters on the display screen 15. The display screen 15 shows the rotation angle of the worm 11, the theoretical rotation angle of the worm wheel 7 under test, the actual rotation angle of the worm wheel 7 under test, and the rotation speed of the worm.

[0034] The process of detecting the worm gear 7 under test in this embodiment of the invention includes: Step S01, starting the industrial control drive unit to drive the cylinder 13 to push the slide 5 to overcome the compression spring 3 and move the slide 5 towards the compression spring positioning post 2 to leave installation space for the worm gear 7 under test, and then installing the worm gear 7 under test on the worm gear positioning unit; Step S02, retracting the industrial control drive unit to push the worm gear 7 under test to contact the worm 11 with the compression spring 3; Step S03, driving the servo motor 8 of the industrial control drive unit to control the worm 11 to rotate and drive the tooth surface of the worm gear 7 under test to mesh with the worm 11; Step S04, the worm gear detection and analysis unit detects the tooth surface quality parameters during the rotation of the worm gear 7 under test, including: the displacement detector detecting the tooth surface quality parameters of the worm gear 7 under test. In the meshing transmission of the worm wheel 7 and the worm gear 11, the displacement or displacement change of the slide table 5 in the guide rail direction is measured; the pressure sensor detects the pressure or pressure change on the pressure sensing slider when the worm wheel 7 under test rotates; the first angle sensor detects the rotation angle of the worm wheel 7 during the meshing rotation of the worm wheel 7 and the worm gear 11; the second angle sensor detects the rotation angle of the worm gear 11 during the meshing rotation of the worm wheel 7 and the worm gear 11; in step S05, the detection feedback unit presents the parameter settings of the industrial control drive unit and the real-time detected worm wheel tooth surface quality parameters in a visual form; in step S06, the detection stops after the worm wheel 7 under test rotates 360°, and the tooth surface profile accuracy of the worm wheel is determined by the colored area and colored position of the worm wheel teeth.

[0035] In practice, the automatic worm gear comprehensive monitoring instrument is equipped with an image acquisition device to obtain the coloring data of each worm gear tooth, and the tooth surface contour accuracy is analyzed based on the contour similarity of the coloring area of ​​each worm gear tooth and the consistency of each coloring position.

[0036] Preferably, the image acquisition device has a preset standard coloring range. If the area of ​​the coloring image of each worm gear tooth within the standard coloring range is greater than or equal to 0.8 times the coloring area corresponding to the standard coloring range, and the area of ​​the coloring image of each worm gear tooth outside the standard coloring range is less than 0.2 times the coloring area corresponding to the standard coloring range, it is determined that the tooth surface profile accuracy of the worm gear under test meets the standard.

[0037] The preset standard coloring range is calculated based on theoretical meshing calculations and actual tolerance fit dimensions, and it is a coloring contour range graphic.

[0038] like Figures 2-4The figures shown are, respectively, a top view, a left view, and a front view of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention. The worm gear positioning unit of the automatic worm gear comprehensive testing instrument according to an embodiment of the present invention includes a compression spring device, a slide 5, and a rotating shaft 6; the compression spring device is used to determine the contact and meshing between the tooth surface of the worm gear 7 to be tested and the worm 11, and includes a compression spring 3, a compression spring adjusting bolt 1, and a compression spring positioning post 2; wherein, the compression spring positioning post 2 is disposed on the base of the monitoring instrument, and a circular through hole parallel to the plane of the base is provided at the upper end of the compression spring positioning post 2, for moving the compression spring adjusting bolt 1 along the through direction of the circular through hole; one end of the compression spring adjusting bolt 1 extends from the circular through hole at the upper end of the compression spring positioning post 2. The through hole passes through and is slidably connected to the circular through hole, and the other end is fixedly connected to the slide table 5; the compression spring 3 is sleeved on the compression spring adjusting bolt 1 and is located between the compression spring positioning post 2 and the slide table 5; the side of the slide table 5 away from the worm gear 11 is fixedly connected to the compression spring adjusting bolt 1, and the end face of the slide table 5 is provided with a rotating shaft 6 perpendicular to the slide table 5 for fixing the worm gear 7 to be tested; the rotating shaft 6 is perpendicular to the upper end face of the slide table 5 and the plane where the base is located, and is used to fix the worm gear 7 to be tested on the slide table 5 through the shaft hole 17 of the worm gear 7 to be tested.

[0039] In implementation, the rotating shaft 6 is provided with at least a first rotating shaft diameter that matches the diameter of the shaft hole 17 of the worm gear 7 to be tested for initial testing, and a second rotating shaft diameter that is smaller than the diameter of the shaft hole 17 of the worm gear 7 to be tested for adjusting the distance between the rotating shaft center and the shaft hole of the worm gear to be tested. Furthermore, a rotating shaft eccentric component is provided on the second rotating shaft diameter.

[0040] Specifically, the worm gear detection and analysis unit includes a linear guide rail, a displacement slider, a displacement detector, a pressure sensor, a first angle sensor, and a second angle sensor. The linear guide rail is mounted on the base and includes a first linear guide rail 141 and a second linear guide rail 142. The first linear guide rail 141 is located behind the compression spring positioning post 2, and the second linear guide rail 142 is located in front of the compression spring positioning post 2. The first linear guide rail 141 and the second linear guide rail 142 are parallel and perpendicular to the compression spring positioning post 2. The displacement slider includes a first displacement slider 41 and a second displacement slider slidably disposed on the first linear guide rail 141, and a third displacement slider 43 and a fourth displacement slider 442 slidably disposed on the second linear guide rail 142. 4; wherein, the lengths of the first linear guide rail 141 and the second linear guide rail 142 are the same as the length of the base in the sliding direction of the track; the first displacement slider 41 is located to the left of the second displacement slider; the third displacement slider 43 is located to the left of the fourth displacement slider 44; the displacement detector is connected to the slide table 5 and is used to detect the displacement or displacement change of the slide table 5 in the guide rail direction during the meshing transmission of the worm gear 7 and the worm 11; the pressure sensor is set on the lower end face of any displacement slider and is used to measure the pressure or pressure change acting on the displacement slider when the worm gear 7 rotates; the first angle sensor is set on the rotating shaft 6 and is used to detect the rotation angle of the worm gear 7 during the meshing rotation process of the worm gear 7 and the worm 11.

[0041] The second angle sensor is connected to the worm and is used to detect the rotation angle of the worm during the meshing and rotation of the worm wheel and the worm.

[0042] In practice, the theoretical rotation angle of the worm gear 7 to be tested can be determined based on the rotation angle of the worm 11. The difference between the theoretical rotation angle of the worm gear 7 to be tested and the actual rotation angle of the worm gear 7 to be tested monitored by the first angle sensor is used to obtain the angle deviation of the rotation angle. In application, the angle deviation is taken as the absolute value.

[0043] In this embodiment, the pressure sensor is located on the lower end face of the second displacement slider. It can be understood that when the worm gear 7 under test rotates on the slide table 5, the pressure displayed on the pressure sensor is its gravitational component on the second displacement slider. Therefore, the mass uniformity of the worm gear 7 under test will affect the pressure detected by the pressure sensor slider when the worm gear rotates. That is, if the mass distribution of the worm gear 7 under test is uneven, and the center of gravity of the worm gear 7 is not on the same axis as the axis of rotation 6, then the pressure experienced during rotation will change with the rotation of the center of gravity of the worm gear 7. Conversely, if the mass of the worm gear is uniform, then the pressure change should be relatively stable. Furthermore, the magnitude of the pressure reflects the magnitude of the gravitational component of the worm gear 7 on the second displacement slider, and the two are directly proportional. This pressure change can reflect the overall uniformity of the worm gear disk.

[0044] Please continue reading. Figure 2 As shown, the four displacement sliders are located at the four vertices of the bottom surface of the slide table 5. The first displacement slider 41 is located at the upper left vertex of the slide table 5, and its left and upper sides are on the same plane as the left and upper sides of the slide table 5, respectively. The second displacement slider is located at the upper right vertex of the slide table 5, and its right and upper sides are on the same plane as the right and upper sides of the slide table 5, respectively. The third displacement slider 43 is located at the lower left vertex of the slide table 5, and its left and lower sides are on the same plane as the left and lower sides of the slide table 5, respectively. The fourth displacement slider 44 is located at the lower right vertex of the slide table 5, and its right and lower sides are on the same plane as the right and lower sides of the slide table 5, respectively.

[0045] Specifically, the worm gear 11 mating unit includes a worm gear 11, a bearing bracket, and a bearing 12. The worm gear 11 is perpendicular to the rotating shaft 6 and parallel to the base, and is used to drive the worm gear 7 under test to rotate around the worm gear shaft hole by meshing with the worm gear 7 under test. The bearing bracket is fixedly connected to the base and includes a first bearing bracket 101 and a second bearing bracket 102. The first bearing bracket 101 is located behind the first linear guide rail 141 and away from the compression spring positioning post 2. The second bearing bracket 102 is located in front of the second linear guide rail 142 and away from the compression spring positioning post 2. The first bearing bracket 101 and the second bearing bracket 102 are... On opposite sides of 2, a first bearing sleeve and a second bearing sleeve of the same height are respectively provided. The first bearing sleeve is located on the first bearing bracket 101, and the second bearing sleeve is located on the second bearing bracket 102. A first bearing is provided on the first bearing sleeve, and a second bearing is provided on the second bearing sleeve. The first bearing and the second bearing are respectively connected to both ends of the worm gear 11 for mounting the worm gear 11. The vertical distance between the bearing sleeve and the base is greater than the vertical distance between the slide table 5 and the base. A second angle sensor is provided above the second bearing sleeve to detect the rotation angle of the worm gear 11 during the meshing and rotation of the worm wheel 7 under test and the worm gear 11.

[0046] It is understood that the worm 11 and the worm wheel 7 to be tested should be on the same horizontal plane, that is, the vertical distance of the worm 11 from the base is equal to the vertical distance of the worm wheel 7 to the base.

[0047] Specifically, the industrial control drive unit includes a servo motor 8, a cylinder 13, and an industrial control component 9. The servo motor 8 is used to drive the worm gear 11 to rotate so that the worm gear 11 meshes with the tooth surface of the worm wheel 7 to be tested, and to drive the cylinder 13 to push the slide table 5 to move along the sliding direction of the track. The industrial control component 9 is connected to the servo motor 8 and is used to control the servo motor 8 to output driving force to control the worm gear 11 to rotate, control the cylinder 13 to push the slide table 5 to overcome the elastic force of the compression spring 3 so that the slide table 5 is displaced in the direction of the compression spring positioning post 2 to leave installation space for the worm wheel 7 to be tested, and control the cylinder 13 to push the slide table 5 in the direction of the bearing bracket through the elastic force of the compression spring 3 so that the worm wheel 7 to be tested contacts and meshes with the worm gear 11.

[0048] In implementation, the industrial control component 9 includes four buttons for controlling the power on and off of the detector, controlling the servo motor 8 to drive the cylinder 13, and controlling the servo motor 8 to drive the worm gear 11 to rotate; controlling the servo motor 8 to drive the worm gear 11 to rotate includes controlling the start of rotation, stopping rotation, and changing the rotation speed.

[0049] Specifically, the worm gear 11 mating unit also includes a worm gear 11 coloring device, which includes a color supply component, a coloring arm, and a coloring head. The color supply component is installed on the side of the first bearing bracket 101 away from the worm gear 11 and is used to load colored colorant and deliver it to the coloring head. One end of the coloring arm is fixedly installed on the side of the first bearing bracket 101 away from the slide table 5, and the other end of the coloring arm is connected to the coloring head for mounting the coloring head, so that the coloring head uniformly provides colorant to the tooth surface of the worm gear 11 so that the tooth surface of the worm gear 7 under test is coated with colorant during the meshing process with the tooth surface of the worm gear 7 when the worm gear 7 under test rotates.

[0050] Understandably, the colorant should be a removable colored pigment or dye that is different in color from the worm gear 7 to be tested; the color supply assembly includes a container for storing the colorant and a delivery system for delivering the color from the container to the coloring head, the delivery system including a small pump and delivery pipes; the coloring head can be a brush or a roller, and the length of the coloring head should be equal to the length of the worm gear 11.

[0051] Specifically, the trend of the error offset when the worm gear 7 under test rotates is based on a cycle of one revolution of the worm gear. The worm gear detection and analysis unit determines the cause of the error offset based on the fluctuation cycle of the error offset trend, including: when the fluctuation cycle of the trend is within a preset cycle range, the worm gear detection and analysis unit determines that the error offset includes the coaxiality error between the worm gear shaft hole 17 of the worm gear 7 under test and the center of the circle corresponding to the rim; wherein, the error offset is the displacement of the slide 5 during the meshing rotation of the tooth surface of the worm gear 7 under test and the worm 11, the fluctuation cycle of the trend is the angle between the maximum and minimum values ​​of the slide 5 displacement corresponding to the positions on the worm gear 7 under test, and the preset cycle is an angle range including 180°. It can be understood that the preset cycle is adaptively adjusted according to the tolerance requirements of the worm gear, and can generally be set to a closed interval of 160° to 200°.

[0052] Specifically, the worm gear detection and analysis unit determines the tooth surface profile accuracy of the worm gear 7 under test based on the coloring area and coloring position of the colorant on the tooth surface. Specifically, it determines the profile similarity of the coloring area based on the coloring area of ​​each worm gear tooth, and the consistency of the coloring position based on each coloring position. Profile similarity and position consistency can be evaluated using existing technologies. It is understood that higher profile similarity and higher coloring position consistency result in higher tooth surface profile accuracy. Therefore, by setting corresponding values ​​for profile similarity and coloring position consistency, and by setting reasonable tooth surface profile accuracy standards, it is possible to evaluate whether the tooth surface profile accuracy of the worm gear 7 under test meets the standards. Specifically, standards can be set separately for profile similarity and coloring position consistency, or a comprehensive tooth surface profile accuracy standard can be set to comprehensively assess the profile similarity and coloring position consistency.

[0053] Specifically, the worm gear detection and analysis unit determines whether the tooth height of the worm gear 7 under test meets the standard based on the colored area; when the colored area has been determined to meet the tooth surface profile accuracy standard of the worm gear under test, and △R' < 0.2 × (R1max - R1min) and △R' < 0.2 × (R2max - R2min), the tooth height of the worm gear 7 under test is determined to meet the standard; when each colored area has been determined to meet the tooth surface profile accuracy standard of the worm gear 7 under test, the pitch circle tooth pitch of the worm gear 7 under test is determined to meet the standard based on the colored position; the image acquisition device determines whether the tooth surface profile accuracy standard of the worm gear 7 under test is met based on whether the colored positions on each tooth of the worm gear 7 are consistent: when the consistency of the colored positions on each tooth is greater than or equal to the consistency reference value (preferably, the consistency reference value = 92%), the image acquisition device determines that the colored position of the worm gear 7 under test meets the tooth surface profile accuracy standard.

[0054] Once each colored position has been determined to meet the tooth surface profile accuracy standard of the worm gear 7 under test, determine whether the angle deviation value is less than 3°. If it is less than 3°, then the pitch circle tooth pitch of the worm gear 7 under test is determined to meet the standard. Generally, the rotation angle of the worm gear under test should be at least 270° before calculating the angle deviation value.

[0055] like Figure 5 The diagram shows a schematic of the rotating shaft 6 and the eccentric slider 16 in an embodiment of the present invention. In this invention, the rotating shaft 6 further includes an eccentric assembly for adjusting the distance between the axis of the rotating shaft 6 and the shaft hole 17 of the worm gear 7 to be tested. This assembly includes the eccentric slider 16 and a clamping part. The eccentric slider 16 is disposed on the side surface of the rotating shaft 6 to eliminate the coaxiality error between the worm gear shaft hole and the rim of the worm gear 7 to be tested. The clamping part is disposed on the rotating shaft 6 to fix the relative position of the rotating shaft 6 and the worm gear 7 to be tested when the rotating shaft 6 drives the worm gear 7 to rotate.

[0056] It is understandable that the eccentric slider 16 is set as a telescopic structure, with one side of it on the same curved surface as the side surface of the rotating shaft 6. When the worm gear 7 under test is initially tested, the eccentric slider 16 retracts, and the rotating shaft 6 is a single cylinder. When it is necessary to eliminate the coaxiality error between the worm gear shaft hole and the rim of the worm gear 7 under test, the eccentric slider 16 extends to an appropriate length to adjust the axis of the worm gear 7 under test to the ideal axis of the outer circle of the worm gear (adjusted to the position consistent with the center of the worm gear rim) and the worm gear 7 under test is retested. If the error offset still exists after the worm gear 7 under test rotates one revolution and is outside the error range, it is judged that the rim accuracy of the worm gear 7 under test is insufficient.

[0057] In practice, the eccentricity of the eccentric slider 16 (i.e. the length of the eccentric slider 16 extending) is determined based on the coaxiality error: after the worm gear 7 under test rotates one revolution, the highest point and the lowest point among the 41 high points of the worm gear 7 under test are determined. The eccentric slider 16 should extend in the direction of the lowest point, and the distance extended should be half the difference between the highest point and the lowest point.

[0058] In one embodiment, after determining that the displacement error caused by the worm gear meshing is mainly caused by the coaxiality error between the worm gear shaft hole 17 and the rim, the eccentricity of the coaxiality error is determined based on the worm gear position where the maximum and minimum values ​​of the determined error offset are located. After correcting the eccentricity using the eccentric slider 16, the worm gear 7 under test is re-tested, and the degree of elimination of the coaxiality error is analyzed, which can further verify the measurement of the worm gear 7 under test.

[0059] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic worm gear integrated monitoring instrument, characterized in that, include: The worm gear positioning unit is used to fix the worm gear under test on the base of the monitoring instrument; A worm gear engagement unit, which is connected to the worm wheel positioning unit, is used to cooperate with the worm wheel positioning unit to determine the tooth surface quality parameters of the worm wheel under test by means of the meshing data of the worm gear meshing with the worm wheel under test; An industrial control drive unit is connected to the worm gear positioning unit and the worm gear engagement unit respectively. It is used to drive the worm on the worm gear positioning unit to move through the drive cylinder so that the worm gear to be tested contacts the worm gear, and to drive the worm to rotate and mesh with the tooth surface of the worm gear to be tested by controlling the servo motor. The worm gear detection and analysis unit, which is connected to the worm gear positioning unit, is used to detect the meshing data of the tooth surface of the worm gear under test and the worm during the meshing rotation process, so as to analyze the rim roundness of the worm gear under test and the coaxiality of the worm gear shaft hole and the corresponding center of the rim, the tooth surface profile accuracy and worm gear disk uniformity of the worm gear under test, and the angular deviation between the worm gear rotation angle and the worm gear rotation angle during the meshing rotation process of the worm gear under test and the worm. The detection feedback unit is connected to the industrial control drive unit and the worm gear detection and analysis unit respectively, and is used to visualize the set parameters of the industrial control drive unit and the tooth surface quality parameters of the worm gear under test detected by the worm gear detection and analysis unit. The tooth surface quality parameters include the rim roundness, coaxiality, tooth surface profile accuracy, worm gear tooth uniformity, and worm gear disk uniformity, wherein the worm gear tooth uniformity is determined by the angular deviation. The worm gear detection and analysis unit determines the cause of the error offset based on the fluctuation period of the error offset change trend, including: When the fluctuation period of the change trend is within the preset period range, the worm gear detection and analysis unit determines that the error offset includes the coaxiality error between the worm gear shaft hole and the center of the corresponding circle of the worm gear rim. Wherein, the error offset is the displacement of the slide table during the meshing rotation of the worm gear tooth surface and the worm, the change trend fluctuation period is the angle between the maximum and minimum values ​​of the slide table displacement corresponding to the positions on the worm gear under test, and the preset period is an angle interval including 180°.

2. The automatic worm gear integrated monitoring instrument according to claim 1, characterized in that, The worm gear positioning unit includes a compression spring device, a slide, and a rotating shaft; The compression spring device is used to determine the contact and meshing between the tooth surface of the worm gear to be tested and the worm, and includes a compression spring, a compression spring adjusting bolt and a compression spring positioning pin; The compression spring positioning post is mounted on the base of the monitor, and the upper end of the compression spring positioning post is provided with a circular through hole parallel to the plane of the base, so that the compression spring adjusting bolt can move along the through direction of the circular through hole; One end of the spring adjusting bolt passes through the circular through hole at the upper end of the spring positioning post and is slidably connected to the circular through hole, while the other end is fixedly connected to the slide table. The compression spring is sleeved on the compression spring adjusting bolt and is located between the compression spring positioning post and the slide table; The side of the slide away from the worm is fixedly connected to the compression spring adjusting bolt, and the upper surface of the slide is provided with a rotating shaft perpendicular to the slide for fixing the worm wheel to be tested; The rotating shaft is perpendicular to the upper end face of the slide table and the plane where the base is located, so as to fix the worm gear to be tested on the slide table through the shaft hole of the worm gear to be tested.

3. The automatic worm gear integrated monitoring instrument according to claim 2, characterized in that, The worm gear detection and analysis unit includes a linear guide rail, a displacement slider, a displacement detector, a pressure sensor, a first angle sensor, and a second angle sensor. The linear guide rail is mounted on the base and includes a first linear guide rail and a second linear guide rail. The first linear guide rail is located behind the compression spring positioning post, and the second linear guide rail is located in front of the compression spring positioning post. The first linear guide rail and the second linear guide rail are parallel and both are perpendicular to the compression spring positioning post. The displacement slider includes a first displacement slider and a second displacement slider that are slidably disposed on the first linear guide rail, and a third displacement slider and a fourth displacement slider that are slidably disposed on the second linear guide rail. Wherein, the lengths of the first linear guide rail and the second linear guide rail are the same as the length of the base in the sliding direction of the rail; The displacement detector is connected to the slide table and is used to detect the displacement or displacement change of the slide table in the direction of the linear guide rail during the meshing transmission of the worm gear and worm. The pressure sensor is installed on the lower end face of any displacement slider to measure the pressure or pressure change acting on the displacement slider when the worm gear under test rotates. The first angle sensor is mounted on the rotating shaft to detect the rotation angle of the worm wheel during the meshing and rotation process of the worm wheel and the worm. The second angle sensor is connected to the worm and is used to detect the rotation angle of the worm during the meshing and rotation of the worm wheel and the worm.

4. The automatic worm gear integrated monitoring instrument according to claim 3, characterized in that, The worm gear mating unit includes a worm, a bearing bracket, and a bearing; The worm is perpendicular to the rotating shaft and parallel to the base, and is used to drive the worm wheel under test to rotate around the worm wheel shaft hole by meshing with the worm wheel under test. The bearing frame is fixedly connected to the base and includes a first bearing frame and a second bearing frame. The first bearing frame is located on the rear side of the first linear guide rail and away from the compression spring positioning post. The second bearing frame is located on the front side of the second linear guide rail and away from the compression spring positioning post. The first bearing frame and the second bearing frame are respectively provided with a first bearing sleeve and a second bearing sleeve of the same height on opposite sides. The first bearing sleeve is located on the first bearing frame and the second bearing sleeve is located on the second bearing frame. The first bearing sleeve is provided with a first bearing, and the second bearing sleeve is provided with a second bearing. The first bearing and the second bearing are respectively connected to both ends of the worm gear for mounting the worm gear.

5. The automatic worm gear integrated monitoring instrument according to claim 4, characterized in that, The industrial control drive unit includes a servo motor, a cylinder, and industrial control components; The servo motor is used to drive the worm to rotate so that the worm meshes with the tooth surface of the worm wheel to be tested, and to drive the cylinder to push the slide table to move along the sliding direction of the linear guide rail; The industrial control component is connected to the servo motor to control the servo motor to output driving force to control the worm to rotate, control the cylinder to push the slide to overcome the elastic force of the compression spring so that the slide is displaced in the direction of the compression spring positioning post to leave installation space for the worm wheel to be tested, and control the cylinder to push the slide in the direction of the bearing bracket so that the worm wheel to be tested can contact and mesh with the worm.

6. The automatic worm gear integrated monitoring instrument according to claim 5, characterized in that, The worm gear mating unit also includes a worm gear coloring device, which includes a color supply component, a coloring arm, and a coloring head. The color supply assembly is installed on the side of the first bearing bracket away from the worm gear, for loading the colorant and conveying it to the coloring head; One end of the coloring arm is fixedly installed on the side of the first bearing bracket away from the slide table, and the other end of the coloring arm is connected to a coloring head for mounting the coloring head so that the coloring head evenly provides colorant to the tooth surface of the worm gear so that the tooth surface of the worm gear under test is coated with colorant during the meshing process with the tooth surface of the worm gear under test when the worm gear under test rotates.

7. The automatic worm gear integrated monitoring instrument according to claim 6, characterized in that, The worm gear detection and analysis unit determines the tooth surface profile accuracy of the worm gear under test based on the coloring area and coloring position of the colorant on the tooth surface.

8. The automatic worm gear integrated monitoring instrument according to claim 7, characterized in that, The worm gear detection and analysis unit determines whether the tooth height of the worm gear under test meets the standard based on the colored area and the error offset.

9. The automatic worm gear integrated monitoring instrument according to claim 2, characterized in that, The rotating shaft also includes a rotating shaft eccentric assembly for adjusting the distance between the shaft center and the shaft hole of the worm gear to be tested, including an eccentric slider and a clamping part; The eccentric slider is disposed on the side surface of the rotating shaft to eliminate the coaxiality error between the worm wheel shaft hole and the center of the corresponding circle of the worm wheel rim under test. The clamping part is provided on the rotating shaft so as to fix the relative position of the rotating shaft and the worm gear under test when the rotating shaft drives the worm gear under test to rotate.

Images