Detection device for measuring bending amount of gear reference circle of gear shaft

Abstract

The invention relates to the technical field of gear shaft bending amount detection, in particular to a detection device for measuring gear shaft gear reference circle bending amount, which comprises a workbench, and a floating support block and a fixed support block for horizontally supporting a gear shaft are mounted on the workbench. A driven center seat assembly and a driving center seat assembly which are used for axially fixing and rotationally driving the gear shaft are further mounted, and meanwhile, a laser sensor assembly and a plurality of displacement sensor assemblies are further mounted, and the displacement sensor assemblies are located on the outer side of the optical axis of the gear shaft and the round end faces of ejector pin heads at the two ends; the laser sensor assembly is located on the outer side of a gear of the gear shaft and used for measuring the bending amount and the bending angle of the gear shaft. The device can solve the problem that it is difficult to detect internal points of the gear on the gear shaft to reflect the bending amount of the gear at present, and compared with a previous shaft part detection device, the device has the advantages of being high in detection precision, capable of achieving automatic detection, quite suitable for the transportation rhythm of a shaft part production line, safe, reliable and the like.

Description

Technical Field

[0001] The invention relates to the technical field of gear shaft bending detection, and in particular to a detection device for measuring the bending amount of a gear shaft gear pitch circle. Background Art

[0002] In industrial production, shaft parts are important components that have functions and applications such as transmitting motion and power, supporting rotating parts, and bearing weight. The bending and deflection of shaft parts will seriously affect the assembly accuracy and working performance of the machine, and even affect centrifugal vibration, working accuracy, reliability and work safety.

[0003] Therefore, it is particularly important to detect the bending deflection of the shaft. However, the bending detection of shaft parts on the market is currently limited to shaft parts with regular bending deformation. However, for parts such as gear shafts, where the center of the gear varies greatly compared to the center line of the shaft and the gear teeth have complex conditions, the current detection method cannot accurately measure the changes in the bending amount and bending angle.

[0004] The present invention is mainly aimed at the existing detection design of the bending amount of simple shafts, and aims to design a detection device for the bending amount of gear pitch circles that can be applicable to complex gear shafts. Summary of the invention

[0005] The purpose of the present invention is to provide a detection device for measuring the bending amount of a gear pitch circle of a gear shaft, aiming to greatly improve the detection accuracy of the bending amount of complex shaft parts.

[0006] To this end, the present invention proposes a detection device for measuring the bending amount of the gear pitch circle of a gear shaft, comprising a workbench, on which are installed a floating support block and a fixed support block for horizontally supporting the gear shaft, and a driven top seat assembly and an active top seat assembly for axially fixing and rotationally driving the gear shaft. A laser sensor assembly and several displacement sensor assemblies are also installed. The displacement sensor assembly is located on the outside of the optical axis of the gear shaft and on the circular end faces of the top heads on both sides. The laser sensor assembly is located on the outside of the gear of the gear shaft and is used to determine the reference axis and measure the bending amount and bending angle of the gear shaft.

[0007] As a preferred technical solution of the present application, the driven top seat assembly and the active top seat assembly have a similar structure, and the two are symmetrically distributed on the workbench, and the driven top seat assembly and the active top seat assembly both include a pin head, a top seat mounting upper body, a linear drive assembly and a top seat mounting lower body; at the same time, the active top seat assembly also includes a rotary drive assembly, and the driven top seat assembly also has a rotary encoder; the two linear drive assemblies sequentially drive the top seat mounting lower body and the pin head to move horizontally and axially fix the gear shaft, the rotary drive assembly is fixedly mounted on the top seat mounting upper body and drives the pin head to rotate, and at the same time, the rotary encoder is connected to the pin head in the driven top seat assembly.

[0008] As a preferred technical solution of the present application, the top seat mounting upper body and the top seat mounting lower body are rotatably connected via a hinge cover. At the same time, an inclined floating cylinder is installed on the top seat mounting lower body, and the front end of the floating cylinder is in contact with the top seat mounting upper body, so that the top seat mounting upper body rotates around the hinge center axis of the hinge cover to adjust the height of the ejector pin head.

[0009] As a preferred technical solution of the present application, the rotary drive assembly includes a reducer, a drive motor, and a synchronous belt transmission mechanism; the reducer and the drive motor are fixedly mounted on the outer end of the top seat mounting upper body, and the drive motor is connected to the ejector head through a synchronous belt transmission mechanism; the linear drive assembly includes a slide rail mounting plate, a slide rail, a slider, and also includes cylinder one or cylinder two; the top seat mounting lower body is slidably mounted on the slide rail mounting plate through a slider and a slide rail, and is driven by cylinder one or cylinder two.

[0010] As a preferred technical solution of the present application, the displacement sensor assembly includes: a displacement sensor, a lever, a contact rod and a main body support; wherein the contact rod is fixedly mounted at the front end of the lever, and the lever is arranged on the main body support and is rotatably connected through a pin and a bearing, the displacement sensor is fixed behind the main body support, and at the same time, the lever uses a tension spring to make the rear end of the lever contact with the probe of the displacement sensor.

[0011] As a preferred technical solution of the present application, a cylinder three is installed on the rear side of the main support, and the upper end of the cylinder three supports the rear end of the lever.

[0012] As a preferred technical solution of the present application, the displacement sensor assembly also includes a displacement sensor connecting base and a displacement sensor mounting base. The main body support and the displacement sensor connecting base are fixedly connected by bolts and waist-shaped grooves to facilitate the adjustment of the height of the contact rod; and the displacement sensor connecting base is fixedly connected to the displacement sensor mounting base, and the displacement sensor mounting base is slidably matched with the inverted T-slot of the workbench.

[0013] As a preferred technical solution of the present application, the floating support block includes: a support body, and a support block head, a support block seat, and a spring sleeve connected in sequence from top to bottom. The support body is provided with a vertical blind hole that slides with the spring sleeve, and a telescopic spring is installed in the spring sleeve to make the support block head float up and down relative to the support body.

[0014] As a preferred technical solution of the present application, a threaded hole is provided on the side wall of the support body, and the spring sleeve is locked and fixed by installing a locking bolt on the threaded hole of the support body, so as to achieve the purpose of sinking the support block head; strip grooves are respectively provided on the left and right side walls of the support body, and a pair of spring sheets are correspondingly installed in the strip grooves, and at the same time, the spring sheets are fixedly connected to the support block mounting base through a connecting sheet, and the support block mounting base is slidably matched with the inverted T-slot on the workbench.

[0015] As a preferred technical solution of the present application, the laser sensor assembly includes: a laser sensor, a laser sensor column, a laser sensor fixing block and a laser sensor mounting base. The laser sensor is installed on the laser sensor column, and the laser sensor column and the laser sensor fixing block are movably connected by bolts and a waist-shaped groove along the vertical direction, and then horizontally slidably cooperate with the inverted T-shaped groove of the workbench through the laser sensor mounting base.

[0016] Compared with the prior art, the detection device for measuring the bending amount of the gear pitch circle of a gear shaft provided by the present invention has the following beneficial effects.

[0017] 1. The present invention can solve the problem that it is currently difficult to detect the internal points of the gear on the gear shaft to reflect the bending amount of the gear. Compared with the previous detection devices for shaft parts, the present invention has the characteristics of high detection accuracy, automated detection, very suitable for the transportation rhythm of the shaft parts production line, safe and reliable, etc.

[0018] 2. The present invention is mainly used in shaft straightening platforms. The cylinders at both ends drive the pin head to clamp the workpiece, and then the servo motor at one end is controlled and the transmission method of the synchronous pulley is adopted to drive the gear shaft to rotate. In this way, the correctness of the rotation angle of the workpiece during rotation can be guaranteed. The coordinate positions of multiple points on the gear pitch circle are measured by the laser sensor and the coordinate positions of multiple points on the optical axis are measured by the displacement sensor. The rotation angle collected by the rotary encoder is integrated and fitted into a circle. Then, it is compared with the reference axis to obtain the bending amount and bending angle of the gear shaft.

[0019] 3. Fixed shaft workpieces are pushed forward by cylinders with different strokes on both sides. The short-stroke cylinder on one side first pushes the driven top seat assembly, so that the ejector head contacts the workpiece first, acting as a fixed surface. The long-stroke cylinder on the other end pushes forward again, so that the gear shaft can be completely clamped by the ejector heads at both ends. Compared with the previous simultaneous feeding method, this method avoids the possible skewness of the gear shaft caused by the simultaneous feeding of the cylinders at both ends or the deformation of the gear shaft caused by the strong force at both ends.

[0020] 4. The top seat end of the device has floating properties. The up and down floating of the ejector pin is controlled by the extension and contraction of the cylinder, which ensures that the gear shaft can be located on the same horizontal reference plane during rotation measurement, avoiding the up and down deviation of the gear shaft during the rotation process, and improving the accuracy of the measurement process and the reliability of the measurement data.

[0021] 5. Compared with the previous iron felt support method, the iron felt cannot be well adapted to different shaft types during straightening due to its single shape, and the purpose of support can be achieved. It is also difficult to accurately fix the position of the shaft, which will greatly affect the accuracy of detection when the shaft rotates. The two support bodies designed by the present invention can be replaced according to the different diameters of the gear shaft, and have strong adaptability. The two sides of the gear shaft are supported by floating support blocks, and the fixed support block in the middle is relatively low in height. The floating support blocks on both sides are provided with spring sleeves inside, which have telescopic springs inside and a hole on the side of the support body. The telescopic length of the telescopic spring can be controlled by locking bolts. When the gear shaft rotates, the spring is compressed, so that the support block head descends to prevent interference with the rotation of the workpiece; after the measurement is completed, the telescopic spring returns to its original length, and the floating support blocks at both ends play a supporting role. According to the measurement results, the position with the largest bending amount is found, and the fixed support block is moved to this position. Since the shaft is rigid, bending deformation will occur when it is pressed down, so the fixed support block can ensure that the gear shaft is not excessively deformed, playing a supporting role, making the detection process more stable and complete.

[0022] 6. The detection part of the present invention uses three displacement sensors and one laser sensor. The contact rods of the two displacement sensor assemblies are located at the lower ends of the ejector pins on both sides, and are used to measure the runout of the circular end surface of the ejector pins, thereby establishing a reference line and setting a reference for subsequent measurements. The laser sensor is used to measure the gear part. This non-contact measurement will not produce pressure on this important part of the gear, thereby causing wear and affecting its matching accuracy. The laser sensor can detect the coordinates of each position of the gear teeth, and then filter out the data points of the correct circle fitting based on the measured data. A 1mm strip area can be set. Within this range, 180 sample points with a radius close to the calculated tooth top circle radius are assumed to be selected, and then these sample points are subtracted from the modulus × tooth top height coefficient to obtain an approximate dividing circle point. By comparing the fitted circle with the set reference axis, the bending amount of the dividing circle can be obtained. This method can remove points with large deviations through screening, reduce the error during measurement, ensure the accuracy of the data, and directly indicate the radius of the dividing circle, which is intuitive and accurate. There is also a displacement sensor used to measure the end face data of the optical axis of the gear shaft. This method enables each part of the gear shaft to be accurately measured and sampled, ensuring the accuracy of the detection.

[0023] 7. This device has a larger workbench with an inverted T-slot. Square nuts are placed in the slot. The top seats at both ends can be moved by loosening and tightening the hexagon socket bolts. This method can facilitate the installation, fixation and sliding of the top seats. The pin head can move by pushing the slider connected to its mounting seat on the slide rail through the cylinder. The movement of the slider and slide rail can greatly reduce the heat generated by friction, and the movement accuracy is high. It can avoid deformation of the gear shaft due to over-tightening during movement, and the installation is also very convenient.

[0024] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the active top seat assembly; Figure 3 It is a cross-sectional view of the active top seat assembly; Figure 4 This is a schematic diagram of the laser sensor assembly structure; Figure 5It is the main view of the displacement sensor assembly; Figure 6 This is an axonometric view of the floating support block; Figure 7 It is a cross-sectional view of the floating support block; Explanation of the reference numerals: 1. Rotary encoder; 2. Cylinder 2; 3. Driven top seat assembly; 4. Floating support block; 5. Fixed support block; 6. Gear shaft; 7. Active top seat assembly; 8. Reducer; 9. Drive motor; 10. Cylinder 1; 11. Floating cylinder; 12. Workbench; 13. Displacement sensor assembly; 14. Laser sensor assembly; 15. Ejector head; 16. Hinge center axis; 17. Hinge cover; 18. Top seat mounting upper body; 19. Synchronous belt; 20. Synchronous pulley; 21. Slide rail; 22. U-shaped connecting plate; 23. Slide rail mounting plate; 2 4. Slider; 25. Top seat mounting lower body; 26. Laser sensor; 27. Laser sensor column; 28. Laser sensor fixing block; 29. ​​Laser sensor mounting base; 30. Contact rod; 31. Lever; 32. Main body support; 33. Tension spring; 34. Cylinder three; 35. Displacement sensor; 36. Displacement sensor connecting base; 37. Displacement sensor mounting base; 38. Support block head; 39. Support block seat; 40. Spring sleeve; 41. Telescopic spring; 42. Support body; 43. Connecting piece; 44. Spring piece; 45. Support block mounting base. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] like Figure 1 to Figure 7 As shown, the detection device for measuring the bending amount of the gear pitch circle of the gear shaft of the present invention includes: a workbench 12, and a driven top seat assembly 3, an active top seat assembly 7, a floating support block 4, a fixed support block 5, a plurality of displacement sensor assemblies 13, and a laser sensor assembly 14 installed on the workbench 12; the gear shaft 6 is placed above the floating support block 4 and the fixed support block 5, and both ends of the gear shaft 6 are axially fixed and rotationally driven by the driven top seat assembly 3 and the active top seat assembly 7, and the displacement sensor assembly 13 and the laser sensor assembly 14 measure the rotating gear shaft 6.

[0028] Specifically, Figure 2 , Figure 3As shown, the active top seat assembly 7 includes a floating cylinder 11, a pin head 15, a hinge center shaft 16, a hinge cover 17, a top seat mounting upper body 18, and a top seat mounting lower body 25. The linear drive assembly includes a slide rail 21 and a slider 24, a U-shaped connecting plate 22, a slide rail mounting plate 23 and a cylinder 10; the rotary drive assembly includes a synchronous belt 19, a synchronous pulley 20, a reducer 8, and a drive motor 9.

[0029] The slide rail mounting plate 23 is fixedly mounted on the workbench 12, and the top seat mounting lower body 25 is slidably mounted on the slide rail mounting plate 23 through the slider 24 and the slide rail 21; at the same time, the right end of the top seat mounting lower body 25 is connected to the cylinder 10 through the U-shaped connecting plate 22, and the cylinder 10 is fixedly connected to the slide rail mounting plate 23, so that the top seat mounting lower body 25 is driven by the cylinder 10 to slide left and right on the slide rail mounting plate 23.

[0030] The top seat mounting upper body 18 is rotatably connected with the top seat mounting lower body 25 through a hinge cover 17. The outer end of the top seat mounting upper body 18 is fixedly mounted with a reducer 8 and a drive motor 9. A longer ejector head 15 is provided inside the top seat mounting upper body 18. A synchronous belt transmission mechanism is provided at the other end of the ejector head 15. The synchronous belt transmission mechanism includes a synchronous pulley 20 connected to the ejector head and a synchronous pulley 20 arranged on the output shaft of the reducer 8. The two synchronous pulleys 20 are connected by a synchronous belt 19, so that the ejector head 15 can be driven to rotate by the drive motor 9, thereby driving the gear shaft 6 to rotate.

[0031] In addition, a floating cylinder 11 is installed on the top seat mounting lower body 25, the floating cylinder 11 is tilted, and the front end of the floating cylinder 11 is in contact with the top seat mounting upper body 18, driving the top seat mounting upper body 18 to rotate around the hinge center axis 16 of the hinge cover 17, thereby achieving the purpose of adjusting the height of the pin head 15.

[0032] The driven top seat assembly 3 and the active top seat assembly 7 have similar structures, and the two are symmetrically distributed on the workbench 12. The driven top seat assembly 3 comprises a cylinder 2, a floating cylinder 11, a pin head 15, a hinge center axis 16, a hinge cover 17, a top seat mounting upper body 18, a synchronous belt 19, a synchronous pulley 20, a slide rail 21, a U-shaped connecting plate 22, a slide rail mounting plate 23, a slider 24, and a top seat mounting lower body 25; the cylinder 2 2 is opposite to the cylinder 1 10, and the pin head 15 is driven by the cylinder 2 2 to axially clamp the gear shaft 6, and the pin head 15 is driven to rotate by the driving motor 9, thereby driving the gear shaft 6 to rotate; the floating cylinder 11 extends the piston rod to support the top seat mounting upper body 18 to rotate around the hinge center axis 16 of the hinge cover 17, thereby achieving the purpose of adjusting the height of the pin head 15 so that it always remains parallel to the workbench.

[0033] At the same time, a rotary encoder 1 is provided on the driven top seat assembly 3. The rotary encoder 1 is connected to the ejector pin head 15 in the top seat mounting upper body 18 in the driven top seat assembly 3 through a synchronous belt transmission mechanism. The rotation angle of the gear shaft 6 can be analyzed through the rotary encoder 1.

[0034] like Figure 4 As shown, the laser sensor assembly 14 includes: a laser sensor 26, a laser sensor column 27, a laser sensor fixing block 28 and a laser sensor mounting base 29; the laser sensor 26 is mounted on a vertical side of the laser sensor column 27, the laser sensor column 27 and the laser sensor fixing block 28 are movably connected by bolts and waist-shaped grooves along the vertical direction to adjust the upper and lower heights of the laser sensor 26, and the laser sensor fixing block 28 is fixedly mounted on the laser sensor mounting base 29, and the laser sensor mounting base 29 is slidably matched with the inverted T-shaped groove on the workbench 12 to adjust the horizontal position of the laser sensor 26.

[0035] Move and fix the laser sensor assembly 14 to the gear. Due to the limited laser distance measurement, the relative positions of the laser sensor column 27, the laser sensor fixing block 28 and the laser sensor mounting base 29 need to be adjusted by loosening and tightening bolts, so that the height of the laser sensor 26 and the distance from the gear can be adjusted so that it can measure the data of each position of the gear.

[0036] like Figure 5 As shown, the displacement sensor assembly 13 includes: a displacement sensor 35, a tension spring 33, a lever 31, a contact rod 30, a main body support 32, a cylinder three 34, a displacement sensor connecting base 36 and a displacement sensor mounting base 37; wherein, the contact rod 30 is fixedly mounted on the front end of the lever 31, and the lever 31 is arranged on the main body support 32 and is rotatably connected through a pin and a bearing, the displacement sensor 35 is fixed at the rear of the main body support 32, and the probe of the displacement sensor 35 is in conflict with the rear end of the lever 31.

[0037] The lever 31 tilts and tilts its front end forward and upward through the retraction force of the tension spring 33, so that its contact rod 30 contacts the position of the circular end surface of the optical axis as much as possible. At the same time, a cylinder 34 is installed on the rear side of the main support 32. When there is no workpiece placed, the upper end of the cylinder 34 presses against the rear end of the lever 31. By controlling the extension of the cylinder 34 (model CJ2B10-15SZ), the tension spring 33 is stretched, and the lever 31 can be lifted up, so that the contact rod 30 is away from the workpiece, which can prevent excessive pressure on the displacement sensor 35 pressure head and damage to the displacement sensor 35.

[0038] In addition, the main support 32 and the displacement sensor connection base 36 are fixedly connected by bolts and waist-shaped grooves, which facilitates the adjustment of the height of the contact rod 30. The displacement sensor connection base 36 is fixedly connected to the displacement sensor mounting base 37, and the displacement sensor mounting base 37 is slidably matched with the inverted T-shaped groove on the workbench 12 to adjust the horizontal position of the contact rod 30.

[0039] like Figure 6 , Figure 7 As shown, the floating support block 4 includes: a support block head 38, a support block seat 39, a spring sleeve 40, a telescopic spring 41, a support body 42, a connecting piece 43, a spring piece 44 and a support block mounting base 45.

[0040] The support block 38 is mounted on the upper end of the support block seat 39, and the spring sleeve 40 is mounted on the lower end of the support block seat 39. The spring sleeve 40 is slidably matched with the vertical blind hole provided at the upper end of the support body 42. At the same time, there is a telescopic spring 41 in the spring sleeve 40, so that the position of the support block 38 relative to the support body 42 can float up and down. Among them, a threaded hole is provided on the rear side wall of the support body 42. By installing a locking bolt on the hole on the side of the support body 42, the spring sleeve 40 is locked and fixed, so as to achieve the purpose of adjusting the height of the support block 38.

[0041] In addition, strip grooves are respectively provided on the left and right side walls of the support body 42, and a pair of spring sheets 44 are correspondingly installed in the strip grooves. At the same time, the spring sheets 44 are fixedly connected to the support block mounting base 45 through the connecting sheet 43, and the support block mounting base 45 is slidably matched with the inverted T-slot on the workbench 12 to adjust the horizontal position of the support block head 38; by arranging the spring sheet 44 between the support body 42 and the support block mounting base 45, the downward pressure force can be dispersed during the subsequent straightening process to prevent the support body 42 from shaking.

[0042] The detection process of the detection device for measuring the bending amount of the gear pitch circle of the gear shaft of the present invention is briefly described as follows: First, place the fixed support block 5 in the middle of the floating support blocks 4 on both sides, then move the floating support blocks 4 on both sides by loosening the hexagonal bolts between the support block mounting base 45 and the workbench 12, remove the locking bolts next to the support body 42, and restore the telescopic spring 41 in the spring sleeve 40 to its original length, so as to adjust the height of the support block head 38 to support both sides of the gear shaft 6, and then tighten the bolts to fix the position of the floating support block 4.

[0043] Then, the driven top seat assembly 3 is moved to a suitable position by tightening the bolts between the slide rail mounting plate 23 and the workbench 12. Since the piston rod of the cylinder 2 is connected to the top seat mounting lower body 25 through the U-shaped connecting plate 22, the slider 24 connected to the top seat mounting lower body 25 can move on the slide rail 21 under the push of the cylinder 2 (model CDQ2B40-40DZ), so that the ejector head 15 can just extend into the center hole of the gear shaft 6; then the active top seat assembly 7 is moved to a suitable position, so that the ejector head 15 can tighten the gear shaft 6 under the push of the cylinder 10 (model CDQ2B40-75DZ).

[0044] Next, a displacement sensor assembly 13 is moved to the optical axis of the gear shaft 6 by loosening or tightening the bolts between the displacement sensor mounting base 37 and the workbench 12, and then the height of the contact rod 30 is adjusted by loosening or tightening the bolts between the main support 32 and the displacement sensor connecting base 36, and then the cylinder three 34 (model CJ2B10-15SZ) on the displacement sensor assembly 13 is retracted, and the retraction force of the tension spring 33 can lift the lever 31 so that its contact rod 30 can contact the circular end surface of the optical axis as much as possible. At the same time, when there is no workpiece placed, the piston rod of the cylinder three 34 extends to lift the lever 31, so that the contact rod 30 is away from the workpiece, which can prevent excessive pressure on the displacement sensor 35 pressure head and damage the displacement sensor 35.

[0045] Move and fix the laser sensor assembly 14 to the gear. Due to the limited laser distance measurement, the relative positions of the laser sensor column 27, the laser sensor fixing block 28 and the laser sensor mounting base 29 need to be adjusted by loosening and tightening bolts, so that the height of the laser sensor 26 and the distance from the gear can be adjusted so that it can measure the data of each position of the gear.

[0046] Then, the displacement sensor assemblies 13 at both ends are moved and fixed so that the contact rods 30 can contact the bottom of the circular end surfaces of the ejector pins 15 on both sides. Through the lever 31, according to their corresponding proportions, the change in the radius of the optical axis of the gear shaft 6 during rotation is transmitted back to the probe of the displacement sensor 35 through the contact rod 30 and the lever 31. Then, the change in the optical axis of the gear shaft 6 during rotation can be obtained, and the integrated data can be used as a baseline.

[0047] Then the driving motor 9 of the active top seat assembly 7 rotates forward to drive the reducer 8 to rotate, and transmits the torque to the synchronous pulley 20 with a corresponding reduction ratio. The rotation of the synchronous pulley 20 drives the synchronous belt 19 to transmit the torque to another synchronous pulley 20, and the ejector head 15 connected thereto rotates at the same rotation speed. Due to the clamping force, the gear shaft 6 will rotate with the rotation of the motor, thereby driving the ejector head 15 at the driven end of the ejector seat to rotate, and then the rotation angle is transmitted to the rotary encoder 1 through the belt transmission.

[0048] After clamping the gear shaft 6 and before driving the gear shaft 6 to rotate, a bolt can be inserted into a hole in one side of the floating support block 4 to clamp the groove of the spring sleeve 40, so that the telescopic spring 41 inside is stretched, thereby achieving the purpose of sinking the support block head 38 and the support block seat 39 of the floating support blocks 4 on both sides without affecting the rotation of the gear shaft 6.

[0049] Before the gear shaft 6 starts to rotate, there is a hinge center axis 16 between the hinge cover 17 and the top seat mounting lower body 25, which runs through the top seat mounting upper body 18, so that it can rotate along the hinge center axis 16, thereby driving the ejector head 15 to swing, and it has floating properties. Under the extension and retraction of the side floating cylinder 11, it can ensure that the upper end surface of the top seat mounting upper body 18 is always parallel to the workbench 12, so that the height of the reference line connected by the simulated center of the circular end faces of the ejector heads 15 at both ends remains unchanged, making the data during measurement more accurate.

[0050] The position of each point of the gear shaft 6 during rotation is measured by the laser sensor 26 and the displacement sensor 35, and then combined with the rotation angle collected by the rotary encoder 1, the measured data is finally transmitted back to the host computer, and the data is integrated and fitted into a circle. Finally, the maximum bending amount of the gear pitch circle and the optical axis and the corresponding bending angle are obtained, which lays the foundation for subsequent straightening.

[0051] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A detection device for measuring the bending amount of a gear shaft gear pitch circle, characterized in that: The workbench (12) comprises a floating support block (4) and a fixed support block (5) for horizontally supporting a gear shaft (6), a driven top seat assembly (3) and an active top seat assembly (7) for axially fixing and rotationally driving the gear shaft (6), and a laser sensor assembly (14) and a plurality of displacement sensor assemblies (13). The displacement sensor assembly (13) is located outside the optical axis of the gear shaft (6), and the laser sensor assembly (14) is located outside the gear of the gear shaft (6) and is used to measure the bending amount and bending angle of the gear shaft (6). The displacement sensor assembly (13) is also located at the circular end faces of the ejector pins (15) on both sides and is used to determine the reference axis.

2. The detection device for measuring the bending amount of the gear pitch circle of a gear shaft according to claim 1, characterized in that: The driven center seat assembly (3) and the active center seat assembly (7) have similar structures, and the two are symmetrically distributed on the workbench (12). The driven top seat assembly (3) and the active top seat assembly (7) both comprise an ejector pin head (15), a top seat mounting upper body (18), a linear drive assembly and a top seat mounting lower body (25); the active top seat assembly (7) also comprises a rotary drive assembly, and the driven top seat assembly (3) also comprises a rotary encoder (1); The two linear drive assemblies sequentially drive the top seat mounting lower body (25) and the ejector head (15) to move horizontally and axially fix the gear shaft (6); the rotary drive assembly is fixedly mounted on the top seat mounting upper body (18) and drives the ejector head (15) to rotate; and the rotary encoder (1) is connected to the ejector head (15) in the driven top seat assembly (3).

3. The detection device for measuring the bending amount of the gear pitch circle of a gear shaft according to claim 2, characterized in that: The top seat mounting upper body (18) is rotatably connected to the top seat mounting lower body (25) via a hinge cover (17). At the same time, an inclined floating cylinder (11) is mounted on the top seat mounting lower body (25), and the front end of the floating cylinder (11) abuts against the top seat mounting upper body (18), so that the top seat mounting upper body (18) rotates around the hinge center axis (16) of the hinge cover (17) to adjust the height of the ejector pin (15).

4. The detection device for measuring the bending amount of the gear pitch circle of a gear shaft according to claim 2, characterized in that: The rotary drive assembly comprises a speed reducer (8), a drive motor (9), and a synchronous belt transmission mechanism; the speed reducer (8) and the drive motor (9) are fixedly mounted on the outer end of the top seat mounting upper body (18), and the drive motor (9) is connected to the ejector head (15) through the synchronous belt transmission mechanism; The linear drive assembly comprises a slide rail mounting plate (23), a slide rail (21), a slider (24), and also comprises a cylinder 1 (10) or a cylinder 2 (2); the top seat mounting lower body (25) is slidably mounted on the slide rail mounting plate (23) via the slider (24) and the slide rail (21), and is driven by the cylinder 1 (10) or the cylinder 2 (2).

5. The detection device for measuring the bending amount of the gear pitch circle of a gear shaft according to claim 1, characterized in that: The displacement sensor assembly (13) comprises: a displacement sensor (35), a lever (31), a contact rod (30) and a main body support (32); wherein the contact rod (30) is fixedly mounted on the front end of the lever (31), and the lever (31) is arranged on the main body support (32) and is rotatably connected via a pin and a bearing, and the displacement sensor (35) is fixed behind the main body support (32), and the lever (31) is tensioned by a spring (33) so that the rear end of the lever (31) contacts the probe of the displacement sensor (35).

6. The detection device for measuring the bending amount of the pitch circle of a gear shaft according to claim 5, characterized in that: A cylinder three (34) is installed on the rear side of the main body support (32), and the upper end of the cylinder three (34) is supported against the rear end of the lever (31).

7. The detection device for measuring the bending amount of the pitch circle of a gear shaft according to claim 5, characterized in that: The displacement sensor assembly (13) further comprises a displacement sensor connecting base (36) and a displacement sensor mounting base (37); the main body support (32) and the displacement sensor connecting base (36) are fixedly connected by bolts and waist-shaped grooves, so as to facilitate the adjustment of the height of the contact rod (30); the displacement sensor connecting base (36) and the displacement sensor mounting base (37) are fixedly connected, and the displacement sensor mounting base (37) is slidably matched with the inverted T-shaped groove of the workbench (12).

8. The detection device for measuring the bending amount of the pitch circle of a gear shaft according to claim 1, characterized in that: The floating support block (4) comprises: a support body (42), and a support block head (38), a support block seat (39), and a spring sleeve (40) which are connected in sequence from top to bottom. The support body (42) is provided with a vertical blind hole which is slidably matched with the spring sleeve (40), and a telescopic spring (41) is installed in the spring sleeve (40) so that the support block head (38) floats up and down relative to the support body (42).

9. The detection device for measuring the bending amount of the pitch circle of a gear shaft according to claim 8, characterized in that: A threaded hole is provided on the side wall of the support body (42), and a locking bolt is installed on the threaded hole of the support body (42) to lock and fix the spring sleeve (40), thereby achieving the purpose of sinking the support block (38); The left and right side walls of the support body (42) are respectively provided with strip grooves, and a pair of spring sheets (44) are correspondingly mounted in the strip grooves. At the same time, the spring sheets (44) are fixedly connected to the support block mounting base (45) through a connecting sheet (43), and the support block mounting base (45) is slidably matched with the inverted T-shaped groove on the workbench (12).

10. The detection device for measuring the bending amount of the gear pitch circle of a gear shaft according to claim 1, characterized in that: The laser sensor assembly (14) comprises: a laser sensor (26), a laser sensor column (27), a laser sensor fixing block (28) and a laser sensor mounting base (29); the laser sensor (26) is mounted on the laser sensor column (27), and the laser sensor column (27) and the laser sensor fixing block (28) are movably connected via bolts and waist-shaped grooves along the vertical direction, and then horizontally slidably matched with the inverted T-shaped groove of the workbench (12) via the laser sensor mounting base (29).

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