Automatic worm wheel comprehensive monitor

Abstract

The invention relates to the technical field of detection equipment, in particular to an automatic worm wheel comprehensive monitor which comprises a worm wheel positioning unit, a worm matching unit, an industrial control driving unit, a worm wheel detection analysis unit and a detection feedback unit. According to the invention, the meshing data of the tooth surface of the to-be-detected worm gear and the worm in the meshing rotation process are detected to analyze the rim roundness of the to-be-detected worm gear, the coaxiality of the worm gear shaft hole and the circle center corresponding to the rim, the tooth surface contour precision of the to-be-detected worm gear and the uniformity of the worm gear disc; and determining the tooth surface quality parameter of the to-be-measured worm gear according to the angle deviation value of the worm gear rotation angle and the worm rotation angle in the meshing rotation process of the to-be-measured worm gear and the worm. The quality condition of the worm gear can be comprehensively detected, defects or problems possibly existing in the manufacturing or assembling process of the worm gear can be found in the early stage, and the quality and reliability of products are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular, to an automatic worm gear comprehensive monitor. Background Art

[0002] The worm gear comprehensive monitor is a highly advanced device designed to evaluate the operating status and performance of worm gear mechanical equipment (such as worm gear generators, worm gear compressors, etc.) at an early stage. Its background technology is based on the integration of sensor, data acquisition, and analysis technologies. Multiple sensors (such as vibration sensors, temperature sensors, pressure sensors, etc.) are used to collect key parameters during the operation of the worm gear, and advanced data analysis algorithms and models are employed to achieve comprehensive detection of the worm gear. This monitoring instrument helps to identify potential problems of the worm gear, predict fault trends, optimize maintenance plans, and improve the reliability, safety, and efficiency of the equipment, thereby reducing the downtime and maintenance costs of the equipment where the worm gear is located.

[0003] Chinese Patent Publication No. CN107101556B discloses an automatic worm gear detector. In this invention, the worm gear to be tested is conveyed to the conveyor belt through a vibrating disk, and then the worm gear to be tested is sent from the conveyor belt to the support table through a device for moving the article to be tested. Then, it is successively detected by a worm gear end face detection device, a worm gear flipping device, a first hole diameter measuring device, a second hole diameter measuring device, a dimension D measuring device, a worm gear thickness measuring device, and a cross-ball distance measuring device. The defective products found are pushed off the support table by a defective product removing device arranged on the right side of the remaining measuring devices except the first hole diameter measuring device and fall into the defective product storage box. The qualified products finally fall into the qualified product storage box. In this way, the automatic detection of the worm gear to be tested is realized, thereby improving the efficiency, reducing the probability of errors, and saving labor. It can be seen that this invention does not consider detecting all parts of the worm gear simultaneously during the same detection process, resulting in the problem of low worm gear detection efficiency. Summary of the Invention

[0004] Therefore, the present invention provides an automatic worm gear comprehensive monitor to overcome the problem of low worm gear detection efficiency caused by the complexity of the worm gear detection instrument in the prior art.

[0005] To achieve the above object, the present invention provides an automatic comprehensive worm gear monitor, comprising: a worm gear positioning unit for fixing a worm gear to be measured on the base of the monitor; 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 measured through the meshing data of the worm and the worm gear to be measured; an industrial control driving unit respectively connected to the worm gear positioning unit and the worm gear mating unit for driving the worm on the worm gear positioning unit to move by a driving cylinder so that the worm gear to be measured contacts the worm, and driving the worm to rotate and mesh with the tooth surface of the worm gear to be measured by controlling a servo motor; a worm gear detection and analysis unit connected to the worm gear positioning unit for detecting the meshing data of the tooth surface of the worm gear to be measured and the worm during the meshing rotation process to analyze the rim roundness of the worm gear to be measured and the coaxiality of the center of the worm gear shaft hole corresponding to the rim, the tooth surface profile accuracy of the worm gear to be measured and the worm gear disk uniformity, and the angle deviation amount between the rotation angle of the worm gear and the rotation angle of the worm during the meshing rotation process of the worm gear to be measured and the worm; a detection feedback unit respectively connected to the industrial control driving unit and the worm gear detection and analysis unit for visualizing the set parameters of the industrial control driving unit and the tooth surface quality parameters of the worm gear to be measured detected by the worm gear detection and analysis unit; wherein, 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, and the worm gear tooth uniformity is determined by the angle deviation amount.

[0006] Further, 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 of the tooth surface of the worm gear to be measured and the worm, and includes a compression spring, a compression spring adjustment bolt and a compression spring positioning column; wherein, the compression spring positioning column is arranged on the base of the monitor, and a circular through hole parallel to the base plane is arranged at the upper end of the compression spring positioning column for the compression spring adjustment bolt to move along the through direction of the circular through hole; one end of the compression spring adjustment bolt passes through the circular through hole at the upper end of the compression spring positioning column and is slidably connected to the circular through hole, and the other end is fixedly connected to the slide table; the compression spring is sleeved on the compression spring adjustment bolt and is located between the compression spring positioning column and the slide table; the side surface of the slide table away from the worm is fixedly connected to the compression spring adjustment bolt, and a rotating shaft perpendicular to the slide table is arranged on the upper end surface of the slide table for fixing the worm gear to be measured; the rotating shaft is perpendicular to both the upper end surface of the slide table and the plane where the base is located for fixing the worm gear to be measured on the slide table through the shaft hole of the worm gear to be measured.

[0007] Furthermore, 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 installed 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 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 lengths of the first linear guide rail and the second linear guide rail are both the same as the length of the base in the track sliding direction; the displacement detector is connected to the slide table 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 to be measured and the worm; the pressure sensor is disposed on the lower end surface of any one of the displacement sliders to measure the pressure or pressure change acting on the displacement slider when the worm gear to be measured rotates; the first angle sensor is disposed on the rotating shaft to detect the rotation angle of the worm gear during the meshing rotation of the worm gear to be measured and the worm; the second angle sensor is connected to the worm to detect the rotation angle of the worm during the meshing rotation of the worm gear to be measured and the worm.

[0008] Furthermore, the worm gear matching unit includes a worm, a bearing bracket, and bearings; the worm is perpendicular to the rotating shaft and parallel to the base, and is used to drive the worm gear to be measured to rotate around the worm gear shaft hole through meshing with the worm gear to be measured; 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 behind the first linear guide rail and on the side away from the compression spring positioning post, and the second bearing bracket is located in front of the second linear guide rail and on the side away from the compression spring positioning post. The opposite sides of the first bearing bracket and the second bearing bracket are respectively provided with first bearing sleeves and second bearing sleeves of the same height. The first bearing sleeve is located on the first bearing bracket, and the second bearing sleeve is located on the second bearing bracket; a first bearing is disposed on the first bearing sleeve, and a second bearing is disposed on the second bearing sleeve. The first bearing and the second bearing are respectively connected to both ends of the worm to install the worm.

[0009] Further, 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 to-be-tested worm gear, 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 a driving force to control the rotation of the worm, control the cylinder to push the slide table to overcome the elastic force of the compression spring so that the slide table displaces in the direction of the compression spring positioning column to leave an installation space for the to-be-tested worm gear, and control the cylinder to push the slide table to displace in the direction of the bearing bracket so that the to-be-tested worm gear contacts and meshes with the worm.

[0010] Further, the worm matching unit further includes a worm coloring device, and the worm coloring device 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 away from the worm and is used to load and convey the colored coloring agent 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 with the coloring head and is used to mount the coloring head so that the coloring head evenly supplies the coloring agent to the tooth surface of the worm, so that when the to-be-tested worm gear rotates, the tooth surface of the to-be-tested worm gear is stained with the coloring agent during the meshing process with the tooth surface of the worm gear.

[0011] Further, the worm gear detection and analysis unit determines the formation reason of the error offset according to the change trend fluctuation period of the error offset, including: when the change trend fluctuation period 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 of the to-be-tested worm gear and the center of the circle corresponding to the rim; wherein, the error offset is the displacement of the slide table during the meshing rotation of the tooth surface of the to-be-tested worm gear and the worm, the change trend fluctuation period is the included angle value of the positions of the maximum and minimum values of the slide table displacement corresponding to the to-be-tested worm gear, and the preset period is an angular interval including 180°.

[0012] Further, the worm gear detection and analysis unit determines the tooth surface profile accuracy of the to-be-tested worm gear according to the coloring area and coloring position of the coloring agent stained on the tooth surface of the to-be-tested worm gear.

[0013] Further, the worm gear detection and analysis unit determines whether the tooth height of the to-be-tested worm gear meets the standard according to the coloring area and the error offset.

[0014] Further, the rotating shaft further includes a rotating shaft eccentric component for adjusting the distance between the axis of the rotating shaft and the shaft hole of the worm gear to be measured, including an eccentric slider and a clamping part; the eccentric slider is arranged 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 measured and the center of the circle corresponding to its rim; the clamping part is arranged on the rotating shaft to fix the relative position of the rotating shaft and the worm gear to be measured when the rotating shaft drives the worm gear 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 can stably fix the worm gear to be measured and accurately obtain the tooth surface quality parameters of the worm gear through the close cooperation of the worm gear positioning unit and the worm gear matching unit; the industrial control driving unit realizes the precise control of the precise contact and meshing process between the worm gear and the worm through the coordinated action of the driving cylinder and the servo motor, thereby ensuring the accuracy and reliability of the monitoring; the worm gear detection and analysis unit determines the error offset amount between the worm gear shaft hole and each tooth surface of the worm gear rim by real-time monitoring of the displacement change amount of the sliding table on the linear guide rail, and also detects the tooth surface profile accuracy of the worm gear, the uniformity of the worm gear teeth, and the rotation angle deviation amount, 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] Further, the detection and feedback unit in the automatic worm gear comprehensive monitor provided by the present invention enables the monitor to visually present the set parameters of the industrial control driving unit and the tooth surface quality parameters of the worm gear, enabling the operator to intuitively understand the monitoring results, so that the staff can understand whether there are defects in the worm gear to be measured, what kind of defects exist, where the existing defects are located on the gear, and how to improve the existing defects, and timely adjust and optimize the defective worm gear.

[0017] Further, the automatic worm gear comprehensive detector provided by the present invention integrates the detection of multiple key parameters such as error offset amount, tooth surface profile accuracy, worm gear tooth uniformity, and worm gear disk uniformity. This automatic worm gear comprehensive monitor provides an efficient and accurate quality control means for the worm gear manufacturing industry, ensuring the stability and reliability of the worm gear performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the automatic worm gear comprehensive detector according to an embodiment of the present invention;

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

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

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

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

[0023] In the figure: 1, compression spring adjustment bolt; 2, compression spring positioning column; 3, compression spring; 41, first displacement slider; 43, third displacement slider; 44, fourth displacement slider; 5, slide table; 6, rotating shaft; 7, worm gear to be measured; 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 rail; 142, second linear guide rail; 15, display screen; 16, eccentric slider; 17, shaft hole. Specific embodiments

[0024] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0026] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] Please refer to Figure 1As shown, it is a schematic structural diagram of an automatic worm gear comprehensive detector according to an embodiment of the present invention. The present invention provides an automatic worm gear comprehensive monitor, including: a worm gear positioning unit for fixing a to-be-detected worm gear 7 on the base of the monitor; 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 to-be-detected worm gear 7 based on the meshing data of the worm 11 meshing with the to-be-detected worm gear; an industrial control driving unit respectively connected to the worm gear positioning unit and the worm 11 mating unit for pushing the worm 11 on the worm gear positioning unit to move through a driving cylinder 13 so that the to-be-detected worm gear 7 contacts the worm 11, and driving the worm 11 to rotate and its meshing with the tooth surface of the to-be-detected worm gear 7 by controlling a servo motor 8; a worm gear detection and analysis unit connected to the worm gear positioning unit for detecting the meshing data of the tooth surface of the to-be-detected worm gear 7 and the worm 11 during the meshing rotation process to analyze the rim roundness of the to-be-detected worm gear 7 and the coaxiality of the center of the worm gear shaft hole corresponding to the rim, the tooth surface profile accuracy of the to-be-detected worm gear 7 and the worm gear disk uniformity, and the angle deviation amount between the rotation angle of the worm gear 7 and the rotation angle of the worm 11 during the meshing rotation process of the to-be-detected worm gear 7 and the worm 11; a detection feedback unit respectively connected to the industrial control driving unit and the worm gear detection and analysis unit for visualizing the set parameters of the industrial control driving unit and the tooth surface quality parameters of the to-be-detected worm gear 7 detected by the worm gear detection and analysis unit; wherein, 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, and the worm gear tooth uniformity is determined by the angle deviation amount.

[0029] In implementation, each tooth of the to-be-detected worm gear 7 meshing with the worm 11 will push the slide table 5 to displace a highest point and a lowest point. Assuming the number of teeth of the worm gear is 41, when the worm gear rotates one week, the worm gear detection and analysis unit will collect 41 high point displacement data and 41 low point displacement data.

[0030] Calculate the gap between the maximum value and the minimum value of each of the above high points and the corresponding circumferential position, and calculate the gap between the maximum value and the minimum value of each of the above low points and the corresponding circumferential position. If the included angle formed by the circumferential positions corresponding to the maximum value R1max and the minimum value R1min of each high point and the axis connection of the rotating shaft is 180° or close to 180°, or the included angle formed by the circumferential positions corresponding to the maximum value R2max and the minimum value R2min of each low point and the axis connection of the rotating shaft is 180° or close to 180° (generally, set as a closed interval of 160° to 200°), it can be determined that the error offset amount causing displacement during the worm gear meshing is mainly caused by the coaxiality error between the worm gear shaft hole and the rim.

[0031] If the circumferential position corresponding to the maximum and minimum values of each high point and the axis line of the rotating shaft are much greater than or much less than 180° (generally, it is set to an open interval greater than 200° or less than 160°), or the circumferential position corresponding to the maximum and minimum values of each low point and the axis line of the rotating shaft are much greater than or much less than 180°, then a single high point is subtracted from the adjacent low point to obtain 41 high-low difference values △R. According to the size of the difference △R' between the maximum value △Rmax and the minimum value △Rmin among the 41 high-low difference values, the displacement error caused in the worm gear meshing can be determined. The causes of the offset include the coaxiality error between the worm wheel shaft hole and the wheel rim and the roundness error of the worm wheel rim, among which: if △R'<0.3×(R1max-R1min), and △R'<0.3×(R2max-R2min), it can be determined that the error offset causing displacement in the worm wheel meshing is mainly the coaxiality error between the worm wheel shaft hole and the wheel rim; if △R'≥0.3×(R1max-R1min), or △R'≥0.3×(R2max-R2min), it can be determined that the error offset causing displacement in the worm wheel meshing is mainly the roundness error of the worm wheel rim.

[0032] It can be understood that one rotation of the worm wheel 7 to be tested corresponds to a data period of 360° rotation of the worm wheel (or understood as one worm wheel rotation time) formed on the displacement data of the slide 5, and the contour accuracy of the worm wheel includes the rim roundness and tooth surface contour accuracy of the worm wheel, wherein the rim roundness is obtained by summing the variance of each high point and the variance of each low point, and the larger the sum of the variances is, the lower the rim roundness is, and vice versa; the tooth surface contour accuracy is determined according to the coloring area and coloring position of the colorant on the tooth surface of the worm wheel to be tested, and the higher the contour similarity of the coloring area of each worm wheel tooth is, the higher the consistency of the coloring position is, and the higher the tooth surface contour accuracy is, and vice versa.

[0033] In practice, the detection feedback unit visualizes the tooth surface quality parameters on the display screen 15 , which displays the rotation angle of the worm 11 , the theoretical rotation angle of the worm wheel 7 to be measured, the actual rotation angle of the worm wheel 7 to be measured, and the rotation speed of the worm.

[0034] The process of detecting the to-be-tested worm gear 7 in the embodiments of the present invention includes: Step S01, starting the industrial control drive unit to drive the cylinder 13 to push the sliding table 5 to displace towards the compression spring positioning post 2 against the compression spring 3 to leave an installation space for the to-be-tested worm gear 7, and then installing the to-be-tested worm gear 7 on the worm gear positioning unit; Step S02, driving the cylinder 13 to retract by the industrial control drive unit so that the compression spring 3 pushes the to-be-tested worm gear 7 into contact with the worm 11; Step S03, driving the servo motor 8 by the industrial control drive unit to control the rotation of the worm 11 and drive the tooth surface of the to-be-tested worm gear 7 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 to-be-tested worm gear 7, including: the displacement detector detects the displacement amount or displacement change amount of the sliding table 5 in the guide rail direction during the meshing transmission between the to-be-tested worm gear 7 and the worm 11; the pressure sensor detects the pressure or pressure change amount on the pressure sensing slider when the to-be-tested worm gear 7 rotates; the first angle sensor detects the rotation angle of the worm gear during the meshing rotation between the to-be-tested worm gear 7 and the worm 11; the second angle sensor detects the rotation angle of the worm 11 during the meshing rotation between the to-be-tested worm gear 7 and the worm 11; Step S05, the detection feedback unit presents the parameter setting of the industrial control drive unit and the tooth surface quality parameters detected in real time in a visual form; Step S06, stop detecting after the to-be-tested worm gear 7 rotates 360°, and determine the tooth surface profile accuracy of the worm gear through the coloring area and coloring position of the worm gear teeth.

[0035] In implementation, an image acquisition device is provided on the automatic worm gear comprehensive monitor to acquire the coloring data of each worm gear tooth, and the tooth surface profile accuracy is analyzed according to the contour similarity of the coloring areas of each worm gear tooth and the consistency degree of each coloring position.

[0036] Preferably, a standard coloring range is preset on the image acquisition device. 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 exceeding 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 to-be-tested worm gear meets the standard.

[0037] Among them, the preset standard coloring range is obtained according to theoretical meshing calculation and actual tolerance fit dimensions, and it is a coloring contour range graph.

[0038] Such as Figures 2 - 4As shown, they are respectively the top view, the left view and the front view of the automatic worm gear comprehensive detector according to the embodiment of the present invention. The worm gear positioning unit of the automatic worm gear comprehensive detector according to the embodiment of the present invention includes a compression spring device, a slide table 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 measured and the worm 11, and includes a compression spring 3, a compression spring adjustment bolt 1 and a compression spring positioning column 2; wherein, the compression spring positioning column 2 is arranged on the base of the detector, and a circular through hole parallel to the base plane is arranged at the upper end of the compression spring positioning column 2 for the compression spring adjustment bolt 1 to move along the through direction of the circular through hole; one end of the compression spring adjustment bolt 1 passes through the circular through hole at the upper end of the compression spring positioning column 2 and is slidably connected with the circular through hole, and the other end is fixedly connected with the slide table 5; the compression spring 3 is sleeved on the compression spring adjustment bolt 1 and is located between the compression spring positioning column 2 and the slide table 5; the side surface of the slide table 5 away from the worm 11 is fixedly connected with the compression spring adjustment bolt 1, and a rotating shaft 6 perpendicular to the slide table 5 is arranged on the end surface of the slide table 5 for fixing the worm gear 7 to be measured; the rotating shaft 6 is perpendicular to both the upper end surface of the slide table 5 and the plane where the base is located, and is used to fix the worm gear 7 to be measured on the slide table 5 through the shaft hole 17 of the worm gear 7 to be measured.

[0039] In implementation, the rotating shaft 6 is at least provided with a first rotating shaft diameter that matches the diameter of the shaft hole 17 of the worm gear 7 to be measured for the initial detection, and a second rotating shaft diameter that is smaller than the diameter of the shaft hole 17 of the worm gear 7 to be measured for adjusting the distance between the axis of the rotating shaft and the shaft hole of the worm gear to be measured. Further, a rotating shaft eccentric component is arranged 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 installed 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 at the rear side of the compression spring positioning post 2, and the second linear guide rail 142 is located at the front side of the compression spring positioning post 2. The first linear guide rail 141 and the second linear guide rail 142 are parallel and both 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 44 slidably disposed on the second linear guide rail 142; wherein, the lengths of the first linear guide rail 141 and the second linear guide rail 142 are both the same as the length of the base in the track sliding direction. The first displacement slider 41 is located on the left side of the second displacement slider, and the third displacement slider 43 is located on the left side of the fourth displacement slider 44; the displacement detector is connected to the slide table 5 for detecting the displacement amount or displacement change amount of the slide table 5 in the guide rail direction during the meshing transmission between the worm gear 7 to be measured and the worm 11; the pressure sensor is disposed on the lower end surface of any one of the displacement sliders for measuring the pressure or pressure change amount acting on the displacement slider when the worm gear 7 to be measured rotates; the first angle sensor is disposed on the rotating shaft 6 for detecting the rotation angle of the worm gear 7 during the meshing rotation between the worm gear 7 to be measured and the worm 11.

[0041] The second angle sensor is connected to the worm for detecting the rotation angle of the worm during the meshing rotation between the worm gear to be measured and the worm.

[0042] In implementation, the theoretical rotation angle that the worm gear 7 to be measured should rotate can be determined according to the rotation angle of the worm 11. The difference between the theoretical rotation angle of the worm gear 7 to be measured and the actual rotation angle of the worm gear 7 monitored by the first angle sensor is obtained to get the angle deviation amount of the rotation angle. In application, the absolute value of the angle deviation amount is taken.

[0043] In this embodiment, the pressure sensor is disposed on the lower end surface of the second displacement slider. It can be understood that when the worm gear 7 to be measured rotates on the slide table 5, the pressure displayed on the pressure sensor is the gravity component of the worm gear 7 on the second displacement slider. Therefore, the mass uniformity of the worm gear 7 to be measured will affect the pressure detected by the pressure sensing slider during the rotation of the worm gear; that is, if the mass distribution of the worm gear 7 to be measured is uneven and the center of gravity of the worm gear 7 is not on the same axis as the axis of the rotating shaft 6, then the pressure received during rotation will also change as the center of gravity of the worm gear 7 rotates; conversely, if the mass of the worm gear is uniform, the pressure change should be relatively stable. And the magnitude of the pressure reflects the magnitude of the gravity component of that part of the worm gear 7 on the second displacement slider, and the two are in a proportional relationship. This pressure change can overall reflect the uniformity of the worm gear disk.

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

[0045] Specifically, the worm 11 matching unit includes a worm 11, a bearing frame and a bearing 12; the worm 11 is perpendicular to the rotating shaft 6 and parallel to the base, and is used to drive the worm wheel 7 to be measured to rotate around the worm wheel shaft hole by meshing with the worm wheel 7 to be measured; the bearing frame is fixedly connected to the base, including a first bearing frame 101 and a second bearing frame 102, the first bearing frame 101 is located at the rear side of the first linear guide 141 and away from the side of the compression spring positioning column 2, the second bearing frame 102 is located at the front side of the second linear guide 142 and away from the side of the compression spring positioning column 2, the first bearing frame 101 and the second bearing frame 102 2 are respectively provided with a first bearing sleeve and a second bearing sleeve of the same height on opposite sides thereof, the first bearing sleeve is located on the first bearing frame 101, and the second bearing sleeve is located on the second bearing frame 102; 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 the two ends of the worm 11 for mounting the worm 11; wherein, the vertical distance between the bearing sleeve and the base is greater than the vertical distance between the slide 5 and the base, and a second angle sensor for detecting the rotation angle of the worm 11 during the meshing rotation of the worm wheel 7 to be measured and the worm 11 is provided above the second bearing sleeve.

[0046] It can be understood that the worm 11 and the worm wheel 7 to be measured should be on the same horizontal plane, that is, the vertical distance between the worm 11 and the base is equal to the vertical distance between the worm wheel 7 to be measured and 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 11 to rotate so that the worm 11 meshes with the tooth surface of the to-be-tested worm gear 7, 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 a driving force to control the rotation of the worm 11, 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 displaces in the direction of the compression spring positioning post 2 to leave an installation space for the to-be-tested worm gear 7, and control the cylinder 13 to push the slide table 5 to displace in the direction of the bearing bracket through the elastic force of the compression spring 3 so that the to-be-tested worm gear 7 contacts and meshes with the worm 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 11 to rotate. Controlling the servo motor 8 to drive the worm 11 to rotate includes controlling the start of rotation, stop of rotation, and change of rotation speed.

[0049] Specifically, the worm 11 mating unit further includes a worm 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 11 and is used to load the colored coloring agent and convey 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 with the coloring head for mounting the coloring head, so that the coloring head evenly supplies the coloring agent to the tooth surface of the worm 11, so that the tooth surface of the to-be-tested worm gear 7 is stained with the coloring agent during the meshing process with the tooth surface of the worm gear when the to-be-tested worm gear 7 rotates.

[0050] It can be understood that the coloring agent should be a removable colored pigment or colored dye different from the color of the to-be-tested worm gear 7. The color supply component includes a container for storing the coloring agent and a conveying system for conveying the color from the container to the coloring head. The conveying system includes a small pump and a conveying pipeline. 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 11.

[0051] Specifically, when the to-be-tested worm gear 7 rotates, the change trend of the error offset is periodic with one rotation of the worm gear. The worm gear detection and analysis unit determines the cause of the error offset according to the fluctuation period of the change trend of the error offset, 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 shaft hole 17 of the to-be-tested worm gear 7 and the center of the circle corresponding to the rim; wherein, the error offset is the displacement of the slide table 5 during the meshing rotation of the tooth surface of the to-be-tested worm gear 7 and the worm 11, the fluctuation period of the change trend is the included angle value of the positions corresponding to the maximum and minimum values of the displacement of the slide table 5 on the to-be-tested worm gear 7, and the preset period is an angular interval including 180°. It can be understood that the preset period is adjusted adaptively according to the tolerance requirements of the worm gear. Generally, it can be set as a closed interval of 160° to 200°.

[0052] Specifically, the worm gear detection and analysis unit determines the tooth surface profile accuracy of the to-be-tested worm gear 7 according to the coloring area and coloring position of the coloring agent adhered to the tooth surface of the to-be-tested worm gear 7. Among them, the contour similarity of the coloring area is determined according to the coloring area of each tooth of the worm gear, and the consistency of the coloring position is determined according to each coloring position. The contour similarity and position consistency can be evaluated according to the prior art. It can be understood that the higher the contour similarity and the higher the consistency of the coloring position, the higher the tooth surface profile accuracy. Therefore, by setting corresponding assignments for the contour similarity and the consistency of the coloring position and setting a reasonable tooth surface profile accuracy standard, it is possible to evaluate whether the tooth surface profile accuracy of the to-be-tested worm gear 7 meets the standard. Among them, standards can be set separately for the contour similarity and the consistency of the coloring position, or a comprehensive tooth surface profile accuracy standard can be set to comprehensively evaluate the contour similarity and the consistency of the coloring position.

[0053] Specifically, the worm gear detection and analysis unit determines whether the tooth height of the to-be-tested worm gear 7 meets the standard according to the coloring area; when the coloring area has been determined to meet the tooth surface profile accuracy standard of the to-be-tested worm gear and △R’ < 0.2×(R1max - R1min), △R’ < 0.2×(R2max - R2min), it is determined that the tooth height of the to-be-tested worm gear 7 meets the standard; when each coloring area has been determined to meet the tooth surface profile accuracy standard of the to-be-tested worm gear 7, the pitch diameter circular pitch of the to-be-tested worm gear 7 is determined according to the coloring position; the image acquisition device determines whether it meets the tooth surface profile accuracy standard of the to-be-tested worm gear 7 according to whether the coloring positions on each tooth of the to-be-tested worm gear 7 are consistent: when the consistency of the coloring 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 coloring position of the to-be-tested worm gear 7 meets the tooth surface profile accuracy standard.

[0054] When it is determined that each coloring position meets the tooth surface contour accuracy standard of the worm gear 7 to be measured, determine whether the angular deviation value is less than 3°. If it is less than 3°, it is determined that the pitch diameter circular pitch of the worm gear 7 to be measured meets the standard. Generally, the rotation angle of the worm gear to be measured should be at least 270° before calculating the angular deviation value.

[0055] As Figure 5 shown, it is a schematic diagram of the rotating shaft 6 and the eccentric slider 16 in the embodiment of the present invention. In the present invention, the rotating shaft 6 further includes a rotating shaft 6 offset 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 measured, including an eccentric slider 16 and a clamping portion; the eccentric slider 16 is arranged on the side surface of the rotating shaft 6 to eliminate the coaxiality error between the worm shaft hole of the worm gear 7 to be measured and its rim; the clamping portion is arranged on the rotating shaft 6 to fix the relative position of the rotating shaft 6 and the worm gear 7 when the rotating shaft 6 drives the worm gear 7 to rotate.

[0056] It can be understood that the eccentric slider 16 is set as a telescopic structure, and one side surface of it is on the same curved surface as the side surface of the rotating shaft 6. When initially detecting the worm gear 7 to be measured, the eccentric slider 16 retracts, and the rotating shaft 6 is a single cylindrical shape. When it is necessary to eliminate the coaxiality error between the worm shaft hole of the worm gear 7 to be measured and its rim, the eccentric slider 16 extends an appropriate length to adjust the axis of the worm gear 7 during rotation 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 then re-detect the worm gear 7 to be measured. If the error offset still exists and is outside the error range after the worm gear 7 to be measured rotates one week again, it is determined that the rim accuracy of the worm gear 7 to be measured is insufficient.

[0057] In practice, the eccentricity of the eccentric slider 16 (i.e., the length that the eccentric slider 16 extends) is determined according to the coaxiality error: after the worm gear 7 to be measured rotates one week, determine the highest point position and the lowest point position among the 41 high points of the worm gear 7 to be measured. The eccentric slider 16 should extend in the direction of the lowest point position, and the extended distance should be half of the difference between the highest point position and the lowest point position.

[0058] In one embodiment, after it is determined that the error offset causing displacement in the worm gear meshing is mainly caused by the coaxiality error between the worm shaft hole 17 and the rim, determine the eccentricity of the coaxiality error according to the maximum and minimum values of the determined error offset at the worm gear position, and use the eccentric slider 16 to correct this eccentricity and then re-detect the worm gear 7 to be measured, and analyze the elimination degree of the coaxiality error, which can further verify the measurement of the worm gear 7 to be measured.

[0059] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 fall within the protection scope of the present invention.

[0060] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic comprehensive worm gear monitor, characterized in that, Comprising: A worm gear positioning unit for fixing the worm gear to be measured on the base of the monitor; 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 measured based on the meshing data of the worm and the worm gear to be measured; An industrial control driving unit respectively connected to the worm gear positioning unit and the worm gear mating unit for pushing the worm on the worm gear positioning unit to move through a driving cylinder so that the worm gear to be measured contacts the worm, and driving the worm to rotate and mesh with the tooth surface of the worm gear to be measured by controlling a servo motor; A worm gear detection and analysis unit connected to the worm gear positioning unit for detecting the meshing data of the tooth surface of the worm gear to be measured and the worm during the meshing rotation process to analyze the rim roundness of the worm gear to be measured and the coaxiality of the center of the worm gear shaft hole corresponding to the rim, the tooth surface profile accuracy of the worm gear to be measured and the worm gear disk uniformity, and the angular deviation amount between the rotation angle of the worm gear and the rotation angle of the worm during the meshing rotation process of the worm gear to be measured and the worm; A detection feedback unit respectively connected to the industrial control driving unit and the worm gear detection and analysis unit for visualizing the set parameters of the industrial control driving unit and the tooth surface quality parameters of the worm gear to be measured detected by the worm gear detection and analysis unit; Wherein, 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, and the worm gear tooth uniformity is determined by the angular deviation amount; 2. The automatic worm gear comprehensive monitor according to claim 1, characterized in that, 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 of the tooth surface of the worm gear to be measured and the worm, and includes a compression spring, a compression spring adjusting bolt and a compression spring positioning column; Wherein, the compression spring positioning column is arranged on the base of the monitor, and a circular through hole parallel to the base plane is arranged at the upper end of the compression spring positioning column for 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 column and is slidably connected to the circular through hole, and 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 column and the slide table; The side of the slide table away from the worm is fixedly connected to the compression spring adjusting bolt, and a rotating shaft perpendicular to the slide table is arranged on the upper end surface of the slide table for fixing the worm gear to be measured; The rotating shaft is perpendicular to both the upper end surface of the slide table and the plane of the base for fixing the worm gear to be measured on the slide table through the shaft hole of the worm gear to be measured; 3. The automatic worm gear comprehensive monitor 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 installed on the base, and includes a first linear guide rail and a second linear guide rail. The first linear guide rail is located at the rear side of the compression spring positioning column, and the second linear guide rail is located at the front side of the compression spring positioning column. The first linear guide rail and the second linear guide rail are parallel and both perpendicular to the compression spring positioning column; The displacement slider includes a first displacement slider and a second displacement slider slidably arranged on the first linear guide rail, and a third displacement slider and a fourth displacement slider slidably arranged on the second linear guide rail; Wherein, the lengths of the first linear guide rail and the second linear guide rail are both the same as the length of the base in the track sliding direction; The displacement detector is connected to the sliding table for detecting the displacement amount or displacement change amount of the sliding table in the direction of the linear guide rail during the meshing transmission of the worm gear to be measured and the worm; The pressure sensor is arranged on the lower end surface of any displacement slider for measuring the pressure or pressure change amount acting on the displacement slider when the worm gear to be measured rotates; The first angle sensor is arranged on the rotating shaft for detecting the rotation angle of the worm gear during the meshing rotation of the worm gear to be measured and the worm; The second angle sensor is connected to the worm for detecting the rotation angle of the worm during the meshing rotation of the worm gear to be measured and the worm; 4. The automatic worm gear comprehensive monitor according to claim 3, characterized in that, The worm matching unit includes a worm, a bearing bracket and a bearing; The worm is perpendicular to the rotating shaft and parallel to the base for driving the worm gear to be measured to rotate around the worm gear shaft hole by meshing with the worm gear to be measured; 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 behind the first linear guide rail and away from the side of the compression spring positioning column, and the second bearing bracket is located in front of the second linear guide rail and away from the side of the compression spring positioning column. The opposite sides of 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. The first bearing sleeve is located on the first bearing bracket, and the second bearing sleeve is located on the second bearing bracket; A first bearing is arranged on the first bearing sleeve, and a second bearing is arranged on the second bearing sleeve. The first bearing and the second bearing are respectively connected to both ends of the worm for installing the worm; 5. The automatic worm gear comprehensive monitor according to claim 4, characterized in that, The industrial control driving 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 tooth surfaces of the worm and the worm gear to be measured are meshed, and to drive the cylinder to push the sliding table to move along the sliding direction of the linear guide rail; The industrial control component is connected to the servo motor for controlling the servo motor to output a driving force to control the rotation of the worm, controlling the cylinder to push the sliding table to overcome the elastic force of the compression spring so that the sliding table is displaced in the direction of the compression spring positioning column to leave an installation space for the worm gear to be measured, and controlling the cylinder to push the sliding table to be displaced in the direction of the bearing bracket so that the worm gear to be measured is in contact with and meshed with the worm; 6. The automatic worm gear comprehensive monitor according to claim 5, characterized in that The worm matching unit further includes a worm coloring device, and the worm coloring device 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 away from the worm for loading a colored coloring agent and transporting 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 sliding table, and the other end of the coloring arm is connected with a coloring head for mounting the coloring head, so that the coloring head uniformly supplies a coloring agent to the tooth surface of the worm, so that when the worm gear to be measured rotates, the tooth surface of the worm gear to be measured is stained with the coloring agent during the meshing process with the tooth surface of the worm gear.

7. The automatic worm gear comprehensive monitor according to claim 6, characterized in that, The worm gear detection and analysis unit determines the formation reason of the error offset according to the change trend fluctuation period of the error offset, including: When the change trend fluctuation period 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 of the worm gear to be measured and the center of the circle corresponding to the rim; Among them, the error offset is the displacement of the sliding table during the meshing rotation of the tooth surface of the worm gear to be measured and the worm, the change trend fluctuation period is the included angle value of the positions of the maximum and minimum values of the sliding table displacement corresponding to the worm gear to be measured, and the preset period is an angle interval including 180°.

8. The automatic worm gear comprehensive monitor according to claim 7, wherein, The worm gear detection and analysis unit determines the tooth surface profile accuracy of the worm gear to be measured according to the coloring area and coloring position of the coloring agent stained on the tooth surface of the worm gear to be measured.

9. The automatic worm gear comprehensive monitor according to claim 8, wherein, The worm gear detection and analysis unit determines whether the tooth height of the worm gear to be measured meets the standard according to the coloring area and the error offset.

10. The automatic worm gear comprehensive monitor according to claim 2, wherein, The rotating shaft further includes a rotating shaft eccentric assembly for adjusting the distance between the axis of the rotating shaft and the shaft hole of the worm gear to be measured, including an eccentric slider and a clamping part; The eccentric slider is arranged 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 measured and the center of the circle corresponding to its rim; The clamping part is arranged on the rotating shaft to fix the relative position of the rotating shaft and the worm gear to be measured when the rotating shaft drives the worm gear to be measured to rotate.

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