A flexible positioning tooth thickness measuring device and a measuring method thereof

Abstract

The present invention relates to the field of gear process detection, and specifically to a flexible positioning tooth thickness measuring device and a measuring method thereof. The tooth thickness measuring device of the present invention comprises a base, a sliding device is arranged on the base, and a gear mounting seat is arranged on the sliding device. A positioning steel ball and a center through hole are arranged on the gear mounting seat, a gear positioning device is arranged in the center through hole, and a positioning bearing is arranged on the gear positioning device. The positioning steel ball is conducive to the rotation of the gear part to be measured during measurement, realizes flexible rotation, and realizes precise positioning. The positioning bearing is arranged on the gear positioning device, which is helpful for the rotation adjustment, placement and removal of the gear part to be measured. A movable support frame is arranged on the base, a tooth width measuring instrument is arranged on the movable support frame, and a measuring ball and an indicator are arranged on the tooth width measuring instrument. The movable support frame facilitates the adjustment of the position of the tooth width measuring instrument and facilitates measurement, and the indicator facilitates the reading of the tooth width data. The device has high measurement accuracy, the measurement is not affected by time and space, and has strong practicality.

Description

Technical Field

[0001] This invention relates to the field of gear manufacturing process inspection, specifically to a flexible positioning tooth thickness measuring device and its measurement method. Background Art

[0002] In the machining industry, how to quickly and accurately measure the tooth thickness during gear processing has always been a major problem in on-site production. Currently, the domestic automotive industry generally uses gear measuring equipment or special gauges to measure the tooth thickness. Gear measuring equipment has high environmental requirements and is placed in a fixed space, and sending it for inspection wastes time, which brings great inconvenience to the measurement. Moreover, the special gauges currently have drawbacks such as poor flexibility, difficulty in placing them flat, and inconvenience in rotation. When measuring the tooth thickness at multiple points, inaccurate measurements and operational errors are likely to occur. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a flexible tooth thickness measuring device and its measuring method. This tooth thickness measuring device can adapt to various measuring environments, and the measurement is not affected by time and space. The device is flexible, easy to place flat, and facilitates gear position adjustment and rotation during the measurement process. The measurement is convenient, fast, and accurate, and has strong practicality.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A flexible positioning tooth thickness measuring device includes a base, a sliding device on the base, a gear mounting seat on the sliding device, a positioning steel ball and a central through hole on the gear mounting seat, a gear positioning device inside the central through hole, and a positioning bearing on the gear positioning device.

[0006] A movable support frame is installed on the base, and a tooth width measuring instrument is installed on the movable support frame. The tooth width measuring instrument is equipped with a measuring ball and an indicator.

[0007] The sliding device includes a linear guide rail, which is fixedly mounted on a base. A slider is mounted on the linear guide rail, and a worktable is fixedly mounted on the slider. A gear mounting seat is fixedly mounted on the worktable.

[0008] The gear mounting base includes a first conical seat and a second conical seat. Both the first and second conical seats are fixedly mounted on the workbench by bolts. The conical surfaces of the first and second conical seats face each other to form a V-groove, and positioning steel balls are provided in the V-groove.

[0009] The gear positioning device includes a support, which is fixedly mounted on a worktable. At least two bearing arms are mounted on the support, and positioning bearings are mounted on the bearing arms.

[0010] The base has a tightening groove, and a locking block is installed in the tightening groove. The locking block is connected to the movable support frame by bolts.

[0011] The movable support frame includes uprights and horizontal columns, which are fixedly connected by locking sleeves. A mounting base is provided at the bottom of the upright, and the mounting base at the bottom of the upright is connected to the locking block by bolts.

[0012] The tooth width measuring instrument includes a mounting plate, which is fixedly mounted on a cross column. A rack and pinion arm is connected to the mounting plate via a rotating spindle. The rack and pinion arm meshes with the rack and pinion piston through teeth. A measuring ball is provided at one end of the rack and pinion piston, and a contact baffle is provided at the other end. An indicator is fixedly mounted on the tooth width measuring instrument, and the probe of the indicator can contact the contact baffle.

[0013] The rack piston is inserted into the piston cylinder, which is fixedly mounted on the mounting plate. An indicator is fixedly mounted on the piston cylinder. A longitudinal through hole is opened on the cylinder body of the piston cylinder, and the rack rocker arm passes through the longitudinal through hole of the piston cylinder and meshes with the rack piston.

[0014] The fixing rod of the indicator is inserted into the through hole of the expansion sleeve. The expansion sleeve is fixedly mounted on the piston cylinder. Three grooves are opened at one end of the expansion sleeve to form a three-lobed structure. A tapered sleeve is fitted on the three-lobed structure of the expansion sleeve.

[0015] A measurement method for a flexible positioning tooth thickness measuring device includes the following steps:

[0016] S1. Place the standard gear part to be tested on the gear mounting base, rotate the standard gear part horizontally or adjust its position through the sliding device, adjust the position of the tooth width measuring instrument through the movable support frame, so that the measuring ball contacts the involute of the tooth groove of the standard gear part, position the standard gear part through the gear positioning device, set the reading of the tooth width measuring instrument to zero as the reference for subsequent measurement, remove the measuring ball of the tooth width measuring instrument, and remove the standard gear part from the gear positioning device, while ensuring that the positions of the gear positioning device, the gear mounting base and the movable support frame do not change.

[0017] S2. Place the gear part to be tested on the gear mounting base, adjust the tooth width measuring instrument so that the measuring ball contacts the involute of the tooth groove of the gear part to be tested, and read the reading of the indicator.

[0018] S3. When measuring the next tooth thickness, remove the measuring ball of the tooth width measuring instrument, rotate the gear part to be measured, adjust the tooth width measuring instrument so that the measuring ball contacts the involute of the next tooth groove of the gear part to be measured, and read the reading of the indicator again.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The tooth thickness measuring device of this invention includes a base with a sliding device on it. A gear mounting seat is mounted on the sliding device, facilitating the movement of the gear part to be measured. The gear mounting seat has a positioning steel ball and a central through hole. A gear positioning device is installed within the central through hole, and a positioning bearing is mounted on the gear positioning device. The positioning steel ball facilitates the rotation of the gear part during measurement, enabling flexible rotation. The gear positioning device provides precise positioning of the gear. The positioning bearing on the gear positioning device aids in the rotation adjustment, placement, and removal of the gear part on the gear mounting seat. A movable support frame is mounted on the base, and a tooth width measuring instrument is mounted on the movable support frame. The tooth width measuring instrument has a measuring ball and an indicator. The movable support frame facilitates the adjustment of the tooth width measuring instrument's position, making measurement easier, while the indicator facilitates the reading of tooth width data. During measurement, the positioning accuracy of the gear part is high, and the gear part can rotate coaxially or slide via the sliding device, avoiding measurement inaccuracies caused by rigid interference, resulting in high measurement accuracy. Furthermore, the device's flexibility and ease of placement further enhance its measurement accuracy. The device can adapt to various measurement environments, and the measurement is not affected by time and space, making it highly practical.

[0021] Furthermore, the positioning device is equipped with a bearing arm, on which a positioning bearing is mounted. By adjusting the bearing arm, it can be used to install gear parts to be tested with different bore sizes, thus enhancing the practicality of the device.

[0022] Furthermore, a tightening groove is provided on the base, and a locking block is installed inside the tightening groove. The locking block is connected to the movable support frame by bolts. The movable support frame is fixed in different positions on the base by the locking block, the tightening groove, and the bolts, which facilitates adjustment when measuring the gear part to be measured.

[0023] The method of this invention first places a standard gear part on a gear mounting base. By adjusting the relative positions of the gear positioning device, gear mounting base, tooth width measuring instrument, and movable support frame, the measuring ball of the tooth width measuring instrument is brought into contact with the involute of the tooth groove of the standard gear part. Then, the reading of the tooth width measuring instrument is set to zero as the reference for subsequent measurements. The tooth width measuring instrument is then removed, and the standard gear part is taken out of the gear positioning device, while ensuring that the positions of the gear positioning device, gear mounting base, and movable support frame remain unchanged. The relative positions of the gear positioning device, gear mounting base, and movable support frame are positioned using the standard gear part, thereby ensuring the measurement accuracy of the subsequent gear parts to be measured. In subsequent measurements of the same type of gear parts, only different gear parts need to be replaced with different tooth width measuring instruments to obtain the tooth width data of the gear parts to be measured. The measurement process is convenient, fast, and has high accuracy. Attached Figure Description

[0024] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a top view of the overall structure of the removal positioning device of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall structure of the present invention after the parts to be tested are assembled;

[0027] Figure 4 This is a cross-sectional view of the overall structure of the present invention after the parts to be tested are assembled;

[0028] Figure 5 This is a schematic diagram of the positioning device structure of the present invention;

[0029] Figure 6 This is a top view of the positioning device structure of the present invention;

[0030] Figure 7 This is a C-plane sectional view of the positioning device structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the support structure of the present invention;

[0032] Figure 9 This is a front view of the fixed plate structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the fixing plate structure of the present invention;

[0034] Figure 11 This is a side view of the bearing arm structure of the present invention;

[0035] Figure 12 This is a schematic diagram of the bearing arm structure of the present invention;

[0036] Figure 13 This is a schematic diagram of the overall structure of the tooth width measuring instrument of the present invention;

[0037] Figure 14 This is a side view of the tooth width measuring instrument of the present invention;

[0038] Figure 15 This is a top view of the tooth width measuring instrument of the present invention;

[0039] Figure 16 This is a cross-sectional view (AA) of the tooth width measuring instrument of the present invention;

[0040] Figure 17 This is a BB cross-sectional view of the tooth width measuring instrument of the present invention;

[0041] Figure 18 This is a schematic diagram of the rack and pinion piston structure of the present invention;

[0042] Figure 19This is a schematic diagram of the expansion sleeve structure of the present invention;

[0043] Figure 20 This is a side view of the expansion sleeve of the present invention;

[0044] Figure 21 This is a schematic diagram of the rack and pinion arm of the present invention.

[0045] The components are as follows: 1. Base; 2. Locking block; 3. Column; 4. Horizontal column; 5. Locking sleeve; 6. First rubber ball handle; 7. Rack and pinion arm; 8. Limit pin; 9. Rack and pinion piston; 10. Contact baffle; 11. Measuring ball; 12. Gear part to be tested; 13. Linear guide rail; 14. Second rubber ball handle; 15. Worktable; 16. First conical seat; 17. Positioning steel ball; 18. Locking block; 19. Fixing plate; 20. Bearing arm; 21. 1. Positioning bearing; 22. Rotating spindle; 23. Tapered sleeve; 24. Expanding sleeve; 25. Indicator; 26. Second tapered surface seat; 27. Support; 28. Mounting plate; 29. ​​Piston cylinder; 30. Bearing spindle; 31. Gear mounting seat; 32. V-groove; 33. Center through hole; 34. Gear positioning device; 35. Gear width measuring instrument; 36. Tightening groove; 37. Movable support frame; 38. Slider; 39. Fastening bolt; 40. Sliding device. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] like Figure 1 and Figure 2 As shown, a flexible positioning tooth thickness measuring device includes a base 1, a sliding device 40 is provided on the base 1, a gear mounting seat 31 is provided on the sliding device 40, a positioning steel ball 17 and a central through hole 33 are provided on the gear mounting seat 31, a gear positioning device 34 is provided in the central through hole 33, and a positioning bearing 21 is provided on the gear positioning device 34.

[0048] A movable support frame 37 is provided on the base 1, and a tooth width measuring instrument 35 is provided on the movable support frame 37. A measuring ball 11 and an indicator 25 are provided on the tooth width measuring instrument 35.

[0049] Preferably, the tooth thickness measuring device of the present invention includes a base 1, on which a sliding device 40 is provided, and a gear mounting seat 31 is provided on the sliding device 40. By moving the sliding device 40, the gear mounting seat 31 is driven, thereby driving the gear part 12 to be measured to move, which facilitates the position adjustment of the gear part 12 to be measured. The gear mounting seat 31 is provided with a positioning steel ball 17 and a central through hole 33. A gear positioning device 34 is provided in the central through hole 33, and a positioning bearing 21 is provided on the gear positioning device 34. The positioning steel ball 17 facilitates the horizontal rotation of the gear part 12 to be measured, realizing the flexible rotation of the gear part 12 to be measured, which is convenient for operation and improves the measurement accuracy. The gear positioning device 34 can accurately position the gear, preventing the axis position of the gear part 12 to be measured from changing during rotation. By providing a positioning bearing 21 on the gear positioning device 34, it is convenient for the rotation adjustment, placement and removal of the gear part 12 to be measured on the gear mounting seat 31. A movable support frame 37 is mounted on the base 1, and a tooth width measuring instrument 35 is mounted on the movable support frame 37. The tooth width measuring instrument 35 is equipped with a measuring ball 11 and an indicator 25. By adjusting the position of the movable support frame 37, the position of the tooth width measuring instrument 35 can be adjusted, facilitating measurement and improving measurement accuracy. The indicator 25 facilitates the reading of tooth width data. During the measurement process, the positioning accuracy of the gear part 12 under test is high, and the gear part 12 under test can rotate coaxially or slide through the sliding device 40, avoiding measurement inaccuracies due to rigid interference, resulting in high measurement accuracy. In addition, this device has good flexibility and is easy to place flat, further enhancing the measurement accuracy of the device. The device can adapt to various measurement environments, and the measurement is not affected by time and space, making it highly practical.

[0050] Furthermore, a gear positioning device 34 is provided in the central through hole 33 of the gear mounting base 31, and the gear positioning device 34 is fixedly mounted on the worktable 15.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, the sliding device 40 includes a linear guide rail 13, which is fixedly mounted on the base 1. A slider 38 is mounted on the linear guide rail 13, and a worktable 15 is fixedly mounted on the slider 38. A gear mounting seat 31 is fixedly mounted on the worktable 15.

[0052] Preferably, a second rubber ball handle 14 is fixedly installed on the workbench 15 to facilitate the operator to move the workbench 15 and adjust the position of the gear part 12 to be tested.

[0053] like Figure 1 , Figure 2 and Figure 4As shown, the gear mounting base 31 includes a first conical seat 16 and a second conical seat 26. Both the first conical seat 16 and the second conical seat 26 are fixedly mounted on the worktable 15 by bolts. The conical surfaces of the first conical seat 16 and the second conical seat 26 are opposite to each other to form a V-groove 32. A positioning steel ball 17 is provided in the V-groove 32.

[0054] Preferably, the conical surfaces of the first conical seat 16 and the second conical seat 26 face each other to form a V-groove 32, and a positioning steel ball 17 is provided in the V-groove 32. In actual production, the first conical seat 16 and the second conical seat 26 can also be machined as a whole. The positioning steel balls 17 are evenly placed in the V-groove 32, and a certain gap is maintained between the positioning steel balls 17 to facilitate the rotation of the gear part 12 to be tested or the standard gear part when placed on the positioning steel balls 17.

[0055] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the gear positioning device 34 includes a support 27, which is fixedly mounted on the worktable 15. At least two bearing arms 20 are provided on the support 27, and positioning bearings 21 are provided on the bearing arms 20.

[0056] Preferred, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the gear positioning device 34 includes a support 27, which is fixedly mounted on the worktable 15. The support 27 has three pillars with grooves on them. A fixing plate 19 is mounted on the support 27 with a boss on it. The boss on the fixing plate 19 engages with the groove on the support 27 to fix the plate 19. There is a gap between the fixing plates 19. A bearing arm 20 is mounted above the fixing plate 19, and a positioning bearing 21 is mounted on the bearing arm 20. A locking block 18 is mounted below the fixing plate 19. The bearing arm 20 and the locking block 18 are connected by fastening bolts 39, which are located in the gap between the fixing plates 19.

[0057] Furthermore, the positioning device is equipped with a bearing arm 20, on which a bearing mandrel 30 and a positioning bearing 21 are mounted. The positioning bearing 21 is mounted on the bearing arm 20 via the bearing mandrel 30, ensuring that the position of the positioning bearing 21 does not change during rotation, thus improving the measurement accuracy of the device. By adjusting the bearing arm 20, it can be used to position gear parts 12 with different bore diameters, enhancing the practicality of the device.

[0058] like Figure 1 , Figure 3 and Figure 4 As shown, a tightening groove 36 is provided on the base 1, and a locking block 2 is provided in the tightening groove 36. The locking block 2 is connected to the movable support frame 37 by bolts.

[0059] Preferably, the base 1 has a tightening groove 36, which is perpendicular to the sliding device 40. A locking block 2 is provided in the tightening groove 36, and the locking block 2 is connected to the movable support frame 37 by bolts. The movable support frame 37 is fixed in different positions on the base 1 by the locking block 2, the tightening groove 36 and the bolts, so as to adjust the position of the gear part 12 to be measured during measurement.

[0060] like Figure 1 , Figure 3 and Figure 4 As shown, the movable support frame 37 includes a column 3 and a horizontal column 4. The column 3 and the horizontal column 4 are fixedly connected by a locking sleeve 5. A mounting base is provided at the bottom of the column 3. The mounting base at the bottom of the column 3 is connected to the locking block 2 by bolts.

[0061] like Figure 1 , Figure 3 , Figure 4 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, the tooth width measuring instrument 35 includes a mounting plate 28, which is fixedly mounted on the cross column 4. The mounting plate 28 is connected to the rack swing arm 7 via a rotating spindle 22. The rack swing arm 7 meshes with the rack piston 9 through teeth. One end of the rack piston 9 is provided with a measuring ball 11, and the other end is provided with a contact baffle 10. An indicator 25 is fixedly mounted on the tooth width measuring instrument 35, and the probe of the indicator 25 can contact the contact baffle 10.

[0062] Preferably, the gear width measuring instrument 35 includes a mounting plate 28, which is fixedly mounted on the cross column 4 by bolts. A rotating spindle 22 is fixedly mounted on the mounting plate 28, and the rotating spindle 22 passes through a hole in the rack rocker arm 7. The rack rocker arm 7 can rotate around the rotating spindle 22, thereby driving the rack piston 9 to move back and forth, thus realizing the contact and separation between the gear width measuring instrument 35 and the gear part 12 to be measured or the standard gear part. Two limit pins 8 are fixedly mounted on the mounting plate 28. The limit pins 8 are located on both sides of the rack rocker arm 7 and are used to limit the movement range of the rack rocker arm 7. One end of the rack rocker arm 7 is provided with teeth for meshing with the rack piston 9, and the other end is provided with a first rubber ball handle 6, which facilitates the operation of the operator.

[0063] like Figure 4 , Figure 13 , Figure 14 , Figure 15 , Figure 18 and Figure 21 As shown, the rack piston 9 passes through the piston cylinder 29, which is fixedly mounted on the mounting plate 28. An indicator 25 is fixedly mounted on the piston cylinder 29. A longitudinal through hole is provided on the cylinder body of the piston cylinder 29, and the rack rocker arm 7 passes through the longitudinal through hole of the piston cylinder 29 and meshes with the rack piston 9.

[0064] like Figure 3 , Figure 13 , Figure 14 , Figure 15 , Figure 17 Figure 19 and Figure 20 As shown, the fixing rod of the indicator 25 passes through the through hole of the expansion sleeve 24. The expansion sleeve 24 is fixedly mounted on the piston cylinder 29. One end of the expansion sleeve 24 has three grooves to form a three-lobed structure. A tapered sleeve 23 is fitted onto the three-lobed structure of the expansion sleeve 24.

[0065] A measurement method for a flexible positioning tooth thickness measuring device includes the following steps:

[0066] S1. Place the standard gear part of the gear part to be tested 12 on the gear mounting base 31, rotate the standard gear part horizontally or adjust the position of the standard gear part through the sliding device 40, adjust the position of the tooth width measuring instrument 35 through the movable support frame 37, so that the measuring ball 11 contacts the involute of the tooth groove of the standard gear part, position the standard gear part through the gear positioning device 34, set the reading of the tooth width measuring instrument 35 to zero as the reference for subsequent measurement, remove the measuring ball 11 from the tooth width measuring instrument 35, and remove the standard gear part from the gear positioning device 34, while ensuring that the positions of the gear positioning device 34, the gear mounting base 31 and the movable support frame 37 do not change.

[0067] S2. Place the gear part 12 to be tested on the gear mounting base 31, adjust the tooth width measuring instrument 35 so that the measuring ball 11 contacts the involute of the tooth groove of the gear part 12 to be tested, and read the reading of the indicator 25.

[0068] S3. When measuring the next tooth thickness, remove the measuring ball 11 from the tooth width measuring instrument 35, rotate the gear part 12 to be measured, adjust the tooth width measuring instrument 35 so that the measuring ball 11 contacts the involute of the next tooth groove of the gear part 12 to be measured, and read the reading of the indicator 25 again.

[0069] Preferably, in the method of the present invention, a standard gear part of the gear part 12 to be tested is first placed on the gear mounting base 31. By adjusting the relative positions of the gear positioning device 34, the gear mounting base 31, the movable support frame 37, and the tooth width measuring instrument 35, the measuring ball 11 of the tooth width measuring instrument 35 is brought into contact with the involute of the tooth groove of the standard gear part. Then, the reading of the tooth width measuring instrument 35 is set to zero as the reference for subsequent measurement. The first rubber ball handle 6 is rotated to separate the measuring ball 11 from the teeth of the standard gear part, and the standard gear part is removed from the gear positioning device 34, while ensuring that the positions of the gear positioning device 34, the gear mounting base 31, and the movable support frame 37 do not change. The relative positions of the gear positioning device 34, the gear mounting base 31, and the movable support frame 37 are positioned by the standard gear part, thereby ensuring the measurement accuracy of the gear part 12 to be tested.

[0070] Furthermore, if the machining dimensions are consistent, the contact position between the measuring ball 11 and the involute of the gear part 12 to be measured is fixed. Using a precision measuring device to measure a gear as a standard part, when the measuring ball 11 contacts the involute of the tooth groove of the standard gear part, the reading of the tooth width measuring instrument 35 is set to zero as the subsequent measurement reference. The tooth thickness of the gear part 12 to be measured can then be calculated based on the data obtained from each measurement using the indicator 25. The measurement process does not require repeated positioning. In subsequent measurements of the same type of gear part 12, only different gear parts 12 need to be replaced with the tooth width measuring instrument 35 to obtain the tooth width data. The measurement process is convenient, fast, and highly accurate.

[0071] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flexible positioning tooth thickness measuring device, It is characterized in that The invention comprises a base (1), a sliding device (40) is arranged on the base (1), a gear mounting seat (31) is arranged on the sliding device (40), a positioning steel ball (17) and a central through hole (33) are arranged on the gear mounting seat (31), a gear positioning device (34) is arranged in the central through hole (33), and a positioning bearing (21) is arranged on the gear positioning device (34); A movable support frame (37) is arranged on the base (1), a tooth width measuring instrument (35) is arranged on the movable support frame (37), and a measuring ball (11) and an indicator (25) are arranged on the tooth width measuring instrument (35); The tooth width measuring instrument (35) comprises a mounting plate (28), the mounting plate (28) is fixedly arranged on a horizontal column (4), the mounting plate (28) is connected to a rack swing arm (7) via a rotating core shaft (22), the rack swing arm (7) is meshed with a rack piston (9) via teeth, a measuring ball (11) is arranged at one end of the rack piston (9), and a contact baffle (10) is arranged at the other end, and an indicator (25) is fixedly arranged on the tooth width measuring instrument (35), and a measuring head of the indicator (25) can contact the contact baffle (10).

2. A tooth thickness measuring device with flexible positioning as claimed in claim 1, It is characterized in that The sliding device (40) comprises a linear guide rail (13), the linear guide rail (13) is fixedly arranged on the base (1), a slider (38) is arranged on the linear guide rail (13), a workbench (15) is fixedly arranged on the slider (38), and a gear mounting seat (31) is fixedly arranged on the workbench (15).

3. A tooth thickness measuring device with flexible positioning as claimed in claim 1, It is characterized in that The gear mounting seat (31) comprises a first conical seat (16) and a second conical seat (26), the first conical seat (16) and the second conical seat (26) are both fixedly arranged on the workbench (15) by means of bolts, the conical surfaces of the first conical seat (16) and the second conical seat (26) are relatively formed into a V-shaped groove (32), and a positioning steel ball (17) is arranged in the V-shaped groove (32).

4. A tooth thickness measuring device with flexible positioning as claimed in claim 1, It is characterized in that The gear positioning device (34) comprises a support (27), the support (27) is fixedly arranged on the workbench (15), at least two bearing arms (20) are arranged on the support (27), and a positioning bearing (21) is arranged on the bearing arm (20).

5. A tooth thickness measuring device with flexible positioning as claimed in claim 1, It is characterized in that The base (1) is provided with a tightening groove (36), a locking block (2) is arranged in the tightening groove (36), and the locking block (2) is connected to the movable support frame (37) by bolts.

6. A tooth thickness measuring device with flexible positioning as claimed in claim 5, It is characterized in that The movable support frame (37) comprises a column (3) and a cross column (4), the column (3) and the cross column (4) are fixedly connected via a locking sleeve (5), a mounting seat is provided at the bottom of the column (3), and the mounting seat at the bottom of the column (3) is connected to the locking block (2) via bolts.

7. A tooth thickness measuring device with flexible positioning as claimed in claim 1, It is characterized in that The rack piston (9) is inserted into the piston cylinder (29), the piston cylinder (29) is fixedly arranged on the mounting plate (28), an indicator gauge (25) is fixedly arranged on the piston cylinder (29), a longitudinal through hole is opened on the cylinder body of the piston cylinder (29), and the rack swing arm (7) passes through the longitudinal through hole of the piston cylinder (29) and meshes with the rack piston (9).

8. A tooth thickness measuring device with flexible positioning as claimed in claim 1, It is characterized in that The fixing rod of the indicator (25) is inserted into the through hole of the expansion sleeve (24), the expansion sleeve (24) is fixedly arranged on the piston cylinder (29), one end of the expansion sleeve (24) is provided with three grooves to form a three-petal structure, and the cone sleeve (23) is sleeved on the three-petal structure of the expansion sleeve (24).

9. A measuring method of the flexible positioning tooth thickness measuring device according to claim 1, It is characterized in that The following steps are involved: S1. Place the standard gear part of the gear part (12) to be measured on the gear mounting seat (31), rotate the standard gear part horizontally or adjust the position of the standard gear part through the sliding device (40), adjust the position of the tooth width measuring instrument (35) through the movable support frame (37), make the measuring ball (11) contact the involute of the tooth groove of the standard gear part, position the standard gear part through the gear positioning device (34), set the reading of the tooth width measuring instrument (35) to zero as a reference for subsequent measurements, remove the measuring ball (11) of the tooth width measuring instrument (35), and remove the standard gear part from the gear positioning device (34), while ensuring that the positions of the gear positioning device (34), the gear mounting seat (31) and the movable support frame (37) do not change; S2. Place the gear part (12) to be measured on the gear mounting seat (31), adjust the tooth width measuring instrument (35) so that the measuring ball (11) contacts the involute of the tooth groove of the gear part (12) to be measured, and read the indication of the indicator (25); S3. When measuring the next tooth thickness, withdraw the measuring ball (11) of the tooth width measuring instrument (35), rotate the gear part (12) to be measured, adjust the tooth width measuring instrument (35) so that the measuring ball (11) contacts the involute of the next tooth groove of the gear part (12) to be measured, and read the indication of the indicator (25) again.

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