Gear measuring device

By designing the components of the gear measuring device and controlling it with a computer, the problems of difficulty in multi-position measurement and convenient adjustment of existing devices have been solved, achieving high-precision and stable gear measurement.

CN224262496UActive Publication Date: 2026-05-19常州市东力恒基传动有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
常州市东力恒基传动有限公司
Filing Date
2025-08-01
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

Existing gear measuring devices are not convenient for multi-position measurement and it is difficult to easily adjust the measurement position height, which affects the measurement accuracy and stability.

Method used

The design incorporates components such as a measuring table, support frame, rotary table, clamping frame, moving frame, adjusting frame, drive plate, contact probe, servo motor, threaded rod, and cylinder. The servo motor drives the threaded rod and the cylinder to move the limit rod, support plate, and adjusting frame to achieve multi-position measurement and circumferential rotation. Combined with computer, it performs precise motion control and data processing.

Benefits of technology

It enables convenient multi-position measurement of gears, improves measurement accuracy and stability, and enhances the convenience and range of measurement.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a gear measuring device, which comprises a measuring table and a support frame, the top end of the measuring table is provided with the support frame, the top end of the support frame is movably provided with a rotating disc, the top end of the rotating disc is provided with a clamping frame, and the top end of the measuring table on one side of the support frame is provided with a moving frame. An adjusting frame is arranged outside the measuring table above the moving frame, a driving plate is arranged outside the measuring table on one side of the adjusting frame, a contact type measuring head is installed on the outer wall of the driving plate, a connecting arm is installed at the top end of the measuring table on one side of the moving frame, and a computer is installed on the outer wall of the connecting arm. According to the utility model, the convenient multi-position measurement of the gear by the measuring device is realized, the convenient height adjustment of the gear measurement position is facilitated, the gear measurement precision is improved, the convenient circumferential rotation of the gear by the measuring device is facilitated, and the convenient clamping and fixing of the gear by the measuring device are facilitated; and the stability of gear measurement is improved.
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Description

Technical Field

[0001] This utility model relates to the field of measuring device technology, specifically a gear measuring device. Background Technology

[0002] Gear measuring machines are specialized instruments used to inspect gear specifications, primarily in the fields of machinery manufacturing, automotive industry, and aerospace. Their core functions include measuring parameters such as tooth profile, tooth direction, pitch deviation, and radial runout of workpieces such as involute cylindrical gears, gear shaving cutters, and gear shapers.

[0003] A gear measuring device disclosed in the patent announcement number CN221781490U includes a support mechanism and a gear body disposed above the support mechanism. A portable measuring component is installed on the support mechanism. The portable measuring component includes a fixed plate fixed to the top of the support mechanism, a centrally symmetrical side plate disposed inside the fixed plate, and a laser rangefinder fixed to the top of one of the side plates. A rectangular groove is formed on the surface of the fixed plate near the side plate.

[0004] Although it uses a convenient measuring component, eliminating the need for micrometer screw adjustment for distance measurement and reducing the labor intensity of workers, this device is more flexible and convenient, and can be used by non-professionals to measure values ​​more accurately. Moreover, it does not require squeezing and fixing through a lead screw, thereby improving the device's effectiveness, increasing measurement efficiency, and meeting practical application needs.

[0005] However, this does not solve the problem that existing measuring devices of this type are generally not conducive to convenient multi-position measurement of gears, are not convenient for adjusting the height of the gear measurement position, thus affecting the accuracy of gear measurement, and are not convenient for convenient circumferential rotation of the gear, thus affecting the stability of gear measurement. Utility Model Content

[0006] The purpose of this utility model is to provide a gear measuring device to solve the problems mentioned in the background art, such as the inconvenience of measuring devices for convenient multi-position measurement of gears, the inconvenience of convenient height adjustment of gear measuring positions, which affects the accuracy of gear measurement, and the inconvenience of convenient circumferential rotation of gears by the measuring device, which affects the stability of gear measurement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A gear measuring device, comprising a measuring table and a support frame, wherein the support frame is mounted on the top of the measuring table, a rotating disk is movably mounted on the top of the support frame, a clamping frame is mounted on the top of the rotating disk, a movable frame is mounted on the top of the measuring table on one side of the support frame, an adjusting frame is provided on the outside of the measuring table above the movable frame, a drive plate is provided on the outside of the measuring table on one side of the adjusting frame, a contact probe is mounted on the outer wall of the drive plate, a connecting arm is mounted on the top of the measuring table on one side of the movable frame, a computer is mounted on the outer wall of the connecting arm, a servo motor is mounted on the outer wall of the movable frame, and a threaded rod is mounted on the output end of the servo motor, and the threaded rod extends... Extending into the interior of the movable frame, the surface of the threaded rod is fitted with a threaded sleeve. A support base is installed at the top of the threaded sleeve. Limiting rods are symmetrically installed at the top of the support base, and the limiting rods extend to the outside of the adjusting frame and are slidably connected to the adjusting frame. A support plate is provided outside the limiting rod above the adjusting frame, and the support plate is connected to the limiting rod. A first cylinder is installed at the top of the support plate, and the output end of the first cylinder is connected to the adjusting frame. An electric push rod is installed on the outer wall of the adjusting frame. A sliding rod is symmetrically slidably installed on the outer wall of the adjusting frame on one side of the electric push rod, and the output end of the electric push rod is connected to the drive plate. The sliding rod is also connected to the drive plate. A control panel is installed on the measuring table on one side of the computer.

[0008] Preferably, a transmission frame is provided outside the support frame below the rotary disk, and a second cylinder is symmetrically installed on the top of the support frame below the transmission frame, and the output end of the second cylinder is connected to the transmission frame.

[0009] Preferably, a rotating shaft is movably mounted at the center of the transmission frame, and the rotating shaft extends to the outside of the transmission frame and is connected to the rotating disk.

[0010] Preferably, a rotating gear is fitted onto the surface of the rotating shaft, and a power cylinder is mounted on the outer wall of the transmission frame on one side of the rotating gear.

[0011] Preferably, a rack is installed at the output end of the power cylinder, and the rack meshes with a rotating gear. Multiple sets of equidistant limit blocks are movably installed at the top of the transmission frame on one side of the rotating shaft, and the limit blocks are slidably connected to the rotating disk.

[0012] Preferably, a clamping cylinder is installed at the bottom end of the clamping frame, a drive shaft is installed at the output end of the clamping cylinder, a limit arm is symmetrically and movably mounted on the surface of the drive shaft, and clamping arms are movably installed on the outer wall of the clamping frame on one side of the limit arm.

[0013] Preferably, each of the clamping arms has a power shaft installed on the outer wall near the clamping frame, and the clamping frame is movably connected to the clamping arm via the power shaft. Each of the limiting arms has a transmission shaft installed on the outer wall near the clamping arm, and the limiting arm is movably connected to the clamping arm via the transmission shaft. Each of the clamping arms has a clamping block installed on its outer wall.

[0014] Preferably, the output terminal of the control panel is electrically connected to the input terminals of the first cylinder, electric push rod, servo motor, clamping cylinder, power cylinder, second cylinder, computer, and contact probe.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the measuring device not only realizes convenient multi-position measurement of gears, facilitates convenient height adjustment of gear measurement position, improves the accuracy of gear measurement, facilitates convenient circumferential rotation of gears, but also facilitates convenient clamping and fixing of gears, and improves the stability of gear measurement.

[0016] (1) The clamping cylinder drives the clamping block to clamp the gear, the power cylinder drives the clamping block and the gear to rotate, the servo motor drives the threaded rod to rotate, the threaded rod drives the threaded sleeve to move, the threaded sleeve drives the support seat to move, the support seat drives the limit rod, the first cylinder, the support plate, the adjustment frame, the drive plate, and the contact probe to move to one side of the gear, the first cylinder drives the adjustment frame to move, the limit rod slides inside the adjustment frame to provide sliding support for the adjustment frame, so as to facilitate convenient height adjustment of the contact probe, the electric push rod drives the drive plate to move, the sliding rod slides inside the adjustment frame to provide sliding support for the drive plate, so as to facilitate the drive plate to drive the contact probe to contact the gear surface, so as to facilitate the contact probe to measure the gear tooth surface, thus realizing convenient multi-position measurement of the gear by the measuring device, facilitating convenient height adjustment of the gear measurement position, improving the accuracy of gear measurement, and increasing the convenience of gear measurement;

[0017] (2) The second cylinder drives the transmission frame to move, and the transmission frame drives the connecting arm, power cylinder, rotating gear, rotating shaft, clamping block, and gear to move to a suitable position. The power cylinder drives the rack to move, the rack drives the rotating gear to rotate, the rotating gear drives the rotating shaft to rotate, the transmission frame provides movable support for the rotating shaft, the rotating shaft drives the rotating disk to rotate, multiple sets of limit blocks provide sliding support for the rotating disk, and the rotating disk drives the clamping frame, clamping cylinder, clamping arm, clamping block, and gear to rotate, so as to facilitate the adjustment of the gear's measurement range. This realizes the convenient circumferential rotation of the gear by the measuring device, facilitates the convenient multi-level height adjustment of the gear measurement height, and increases the range of gear measurement.

[0018] (3) The clamping cylinder drives the two sets of limit arms to move through the drive shaft. The limit arms drive the clamping arms to rotate around the power shaft through the transmission shaft. The two sets of clamping arms drive the clamping blocks to rotate, so that the two sets of clamping blocks can clamp and fix the gear. This realizes the convenient clamping and fixing of the gear by the measuring device, which facilitates the improvement of the stability of the gear measurement, avoids the measurement error caused by the gear shaking, and improves the effect of gear measurement. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the adjustment frame of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the rotating disk of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the clamping frame of this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the mobile frame of this utility model.

[0025] In the diagram: 1. Measuring table; 2. Support frame; 3. Rotary disk; 4. Clamping frame; 5. Moving frame; 6. Adjusting frame; 7. Drive plate; 8. Contact probe; 9. Connecting arm; 10. Computer; 11. Control panel; 12. Support base; 13. Limiting rod; 14. First cylinder; 15. Support plate; 16. Sliding rod; 17. Electric push rod; 18. Transmission frame; 19. Second cylinder; 20. Rotating shaft; 21. Rotating gear; 22. Power cylinder; 23. Rack; 24. Limiting block; 25. Clamping cylinder; 26. Drive shaft; 27. Limiting arm; 28. Clamping arm; 29. ​​Transmission shaft; 30. Clamping block; 31. Power shaft; 32. Threaded sleeve; 33. Threaded rod; 34. Servo motor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figure 1-6This utility model provides an embodiment of a gear measuring device, comprising a measuring table 1 and a support frame 2. The support frame 2 is mounted on the top of the measuring table 1, and a rotating disk 3 is movably mounted on the top of the support frame 2. A clamping frame 4 is mounted on the top of the rotating disk 3. A movable frame 5 is mounted on the top of the measuring table 1 on one side of the support frame 2. An adjusting frame 6 is provided on the outside of the measuring table 1 above the movable frame 5. A drive plate 7 is provided on the outside of the measuring table 1 on one side of the adjusting frame 6. A contact probe 8 is mounted on the outer wall of the drive plate 7. A connecting arm 9 is mounted on the top of the measuring table 1 on one side of the movable frame 5. A computer 10 is mounted on the outer wall of the connecting arm 9. The output end of the contact probe 8 is electrically connected to the input end of the computer 10. A servo motor 34 is mounted on the outer wall of the movable frame 5, and a threaded rod 3 is mounted on the output end of the servo motor 34. 3. The threaded rod 33 extends into the interior of the movable frame 5. The surface of the threaded rod 33 is fitted with a threaded sleeve 32. A support seat 12 is installed at the top of the threaded sleeve 32. A limit rod 13 is symmetrically installed at the top of the support seat 12. The limit rod 13 extends to the outside of the adjusting frame 6 and is slidably connected to the adjusting frame 6. A support plate 15 is provided outside the limit rod 13 above the adjusting frame 6 and is connected to the limit rod 13. A first cylinder 14 is installed at the top of the support plate 15 and the output end of the first cylinder 14 is connected to the adjusting frame 6. An electric push rod 17 is installed on the outer wall of the adjusting frame 6. A sliding rod 16 is symmetrically slidably installed on the outer wall of the adjusting frame 6 on one side of the electric push rod 17. The output end of the electric push rod 17 is connected to the drive plate 7 and the sliding rod 16 is connected to the drive plate 7.

[0028] The gear to be measured is placed on the surface of the two sets of clamping blocks 30. The control panel 11 is activated to open the clamping cylinder 25, which drives the clamping blocks 30 to clamp the gear. The control panel 11 is activated to open the power cylinder 22, which drives the clamping blocks 30 and the gear to rotate. The control panel 11 is activated to open the servo motor 34. With the support of the moving frame 5, the servo motor 34 drives the threaded rod 33 to rotate. With the threaded connection between the threaded rod 33 and the threaded sleeve 32, the threaded rod 33 drives the threaded sleeve 32 to move. The threaded sleeve 32 drives the support base 12 to move. The support base 12 drives the limit rod 13, the first cylinder 14, the support plate 15, the adjusting frame 6, the drive plate 7, and the contact probe 8 to move to one side of the gear. The control panel 11 is activated to open the first cylinder 14. With the support of the support plate 15, the first cylinder 14 drives the adjusting frame 6 to move. The limit rod 13 slides inside the adjusting frame 6 to provide sliding support for the adjusting frame 6, facilitating the contact probe. 8. Convenient height adjustment: The control panel 11 opens the electric push rod 17. Supported by the adjustment frame 6, the electric push rod 17 drives the drive plate 7 to move. The sliding rod 16 slides inside the adjustment frame 6 to provide sliding support for the drive plate 7, so that the drive plate 7 can drive the contact probe 8 to contact the gear surface. This allows the contact probe 8 to collect a large number of discrete point coordinates of the gear tooth surface in three-dimensional space. Combined with the theoretical gear mathematical model and precision motion control, the computer 10 calculates the deviation between the actual tooth surface and the theoretical tooth surface. The computer 10 is equipped with corresponding hardware or software devices and is operated and measured by professional technicians. The computer 10 converts the physical contact signal into intuitive engineering graphics to facilitate the measurement of the gear. This enables convenient multi-position measurement of the gear by the measuring device, facilitates convenient height adjustment of the gear measurement position, improves the accuracy of gear measurement, and increases the convenience of gear measurement.

[0029] A transmission frame 18 is provided on the outside of the support frame 2 below the rotating disk 3. A second cylinder 19 is symmetrically installed on the top of the support frame 2 below the transmission frame 18, and the output end of the second cylinder 19 is connected to the transmission frame 18. A rotating shaft 20 is movably installed at the center of the transmission frame 18, and the rotating shaft 20 extends to the outside of the transmission frame 18 and is connected to the rotating disk 3. A rotating gear 21 is fitted on the surface of the rotating shaft 20. A power cylinder 22 is installed on the outer wall of the transmission frame 18 on one side of the rotating gear 21. A rack 23 is installed on the output end of the power cylinder 22, and the rack 23 meshes with the rotating gear 21. Multiple sets of equal-spaced limit blocks 24 are movably installed on the top of the transmission frame 18 on one side of the rotating shaft 20, and the limit blocks 24 are slidably connected to the rotating disk 3.

[0030] The control panel 11 opens the second cylinder 19. Supported by the support frame 2, the second cylinder 19 drives the transmission frame 18 to move. The transmission frame 18 drives the connecting arm 9, the power cylinder 22, the rotating gear 21, the rotating shaft 20, the clamping block 30, and the gear to move to the appropriate position. The control panel 11 opens the power cylinder 22. Supported by the transmission frame 18, the power cylinder 22 drives the rack 23 to move. Under the meshing of the rack 23 and the rotating gear 21, the rack 23 drives the rotating gear 21 to rotate. The rotating gear 21 drives the rotating shaft 20 to rotate. The transmission frame 18 provides movable support for the rotating shaft 20. The rotating shaft 20 drives the rotating disk 3 to rotate. Multiple sets of limit blocks 24 provide sliding support for the rotating disk 3. The rotating disk 3 drives the clamping frame 4, the clamping cylinder 25, the clamping arm 28, the clamping block 30, and the gear to rotate, so as to facilitate the adjustment of the gear's measurement range. This realizes the convenient circumferential rotation of the gear by the measuring device, facilitates the convenient multi-level height adjustment of the gear measurement height, and increases the range of gear measurement.

[0031] A clamping cylinder 25 is installed at the bottom of the clamping frame 4. A drive shaft 26 is installed at the output end of the clamping cylinder 25. Limiting arms 27 are symmetrically and movably mounted on the surface of the drive shaft 26. Clamping arms 28 are movably installed on the outer wall of the clamping frame 4 on one side of the limiting arm 27. A power shaft 31 is installed on the outer wall of the clamping arm 28 near the clamping frame 4. The clamping frame 4 is movably connected to the clamping arm 28 through the power shaft 31. A transmission shaft 29 is installed on the outer wall of the limiting arm 27 near the clamping arm 28. The limiting arm 27 is movably connected to the clamping arm 28 through the transmission shaft 29. A clamping block 30 is installed on the outer wall of the clamping arm 28. The output end of the control panel 11 is electrically connected to the input end of the first cylinder 14, the electric push rod 17, the servo motor 34, the clamping cylinder 25, the power cylinder 22, the second cylinder 19, the computer 10, and the contact probe 8.

[0032] When it is necessary to clamp the gear, the control panel 11 opens the clamping cylinder 25. Supported by the clamping frame 4, the clamping cylinder 25 drives the two sets of limiting arms 27 to move via the drive shaft 26. The limiting arms 27 drive the clamping arms 28 to rotate around the power shaft 31 via the transmission shaft 29. The two sets of clamping arms 28 drive the clamping blocks 30 to rotate, so that the two sets of clamping blocks 30 can clamp and fix the gear. This realizes the convenient clamping and fixing of the gear by the measuring device, which facilitates the improvement of the stability of the gear measurement, avoids measurement errors caused by gear shaking, and improves the effect of gear measurement.

[0033] In this embodiment, the gear to be measured is first placed on the surface of two sets of clamping blocks 30. The clamping cylinder 25 drives the clamping blocks 30 to clamp the gear. The power cylinder 22 drives the clamping blocks 30 and the gear to rotate. The servo motor 34 drives the threaded rod 33 to rotate. The threaded rod 33 drives the threaded sleeve 32 to move. The threaded sleeve 32 drives the support base 12 to move. The support base 12 drives the limit rod 13, the first cylinder 14, the support plate 15, the adjusting frame 6, the drive plate 7, and the contact probe 8 to move to one side of the gear. The first cylinder 14 drives the adjusting frame 6 to move. The limit rod 13 slides inside the adjusting frame 6 to provide sliding support for the adjusting frame 6, so as to facilitate convenient height adjustment of the contact probe 8. The electric push rod 17 drives the drive plate 7 to move. The sliding rod 16 slides inside the adjusting frame 6 to provide sliding support for the drive plate 7, so as to facilitate the drive plate 7 to drive the contact probe 8 to contact the gear surface. The second cylinder 19 drives the transmission frame. The transmission frame 18 moves, driving the connecting arm 9, power cylinder 22, rotating gear 21, rotating shaft 20, clamping block 30, and gear to a suitable position. The power cylinder 22 drives the rack 23 to move, the rack 23 drives the rotating gear 21 to rotate, and the rotating gear 21 drives the rotating shaft 20 to rotate. The transmission frame 18 provides movable support for the rotating shaft 20, and the rotating shaft 20 drives the rotating disk 3 to rotate. Multiple sets of limit blocks 24 provide sliding support for the rotating disk 3. The rotating disk 3 drives the clamping frame 4, clamping cylinder 25, clamping arm 28, clamping block 30, and gear to rotate, so as to facilitate the adjustment of the gear's measurement range. The clamping cylinder 25 drives two sets of limit arms 27 to move via the drive shaft 26. The limit arms 27 drive the clamping arm 28 to rotate around the power shaft 31 via the transmission shaft 29. The two sets of clamping arms 28 drive the clamping block 30 to rotate, so as to facilitate the two sets of clamping blocks 30 to clamp and fix the gear, thus completing the use of the measuring device.

Claims

1. A gear measuring device, characterized in that: The measuring table (1) and support frame (2) are included. The support frame (2) is installed on the top of the measuring table (1). A rotating disk (3) is movably installed on the top of the support frame (2). A clamping frame (4) is installed on the top of the rotating disk (3). A movable frame (5) is installed on the top of the measuring table (1) on one side of the support frame (2). An adjusting frame (6) is provided on the outside of the measuring table (1) above the movable frame (5). A drive plate (7) is provided on the outside of the measuring table (1) on one side of the adjusting frame (6). The drive plate (7) has a contact probe (8) mounted on its outer wall. A connecting arm (9) is mounted on the top of the measuring table (1) on one side of the moving frame (5). A computer (10) is mounted on the outer wall of the connecting arm (9). A servo motor (34) is mounted on the outer wall of the moving frame (5). A threaded rod (33) is mounted on the output end of the servo motor (34), and the threaded rod (33) extends into the interior of the moving frame (5). A threaded rod (33) is fitted on the surface of the threaded rod (33). A threaded sleeve (32) is provided, with a support base (12) installed at its top end. Limiting rods (13) are symmetrically installed at the top end of the support base (12), and the limiting rods (13) extend to the outside of the adjusting frame (6). The limiting rods (13) are slidably connected to the adjusting frame (6). A support plate (15) is provided outside the limiting rods (13) above the adjusting frame (6), and the support plate (15) is connected to the limiting rods (13). A first gas valve is installed at the top end of the support plate (15). The first cylinder (14) is connected to the output end of the first cylinder (14) and the adjustment frame (6). An electric push rod (17) is installed on the outer wall of the adjustment frame (6). A sliding rod (16) is symmetrically slidably installed on the outer wall of the adjustment frame (6) on one side of the electric push rod (17). The output end of the electric push rod (17) is connected to the drive plate (7), and the sliding rod (16) is connected to the drive plate (7). A control panel (11) is installed on the measuring table (1) on one side of the computer (10).

2. The gear measuring device according to claim 1, characterized in that: A transmission frame (18) is provided on the outside of the support frame (2) below the rotating disk (3). A second cylinder (19) is symmetrically installed on the top of the support frame (2) below the transmission frame (18), and the output end of the second cylinder (19) is connected to the transmission frame (18).

3. The gear measuring device according to claim 2, characterized in that: A rotating shaft (20) is movably mounted at the center of the transmission frame (18), and the rotating shaft (20) extends to the outside of the transmission frame (18), and the rotating shaft (20) is connected to the rotating disk (3).

4. A gear measuring device according to claim 3, characterized in that: The rotating shaft (20) is fitted with a rotating gear (21), and a power cylinder (22) is installed on the outer wall of the transmission frame (18) on one side of the rotating gear (21).

5. A gear measuring device according to claim 4, characterized in that: The output end of the power cylinder (22) is equipped with a rack (23), and the rack (23) meshes with the rotating gear (21). Multiple sets of equidistant limit blocks (24) are movably installed on the top of the transmission frame (18) on one side of the rotating shaft (20), and the limit blocks (24) are slidably connected to the rotating disk (3).

6. A gear measuring device according to claim 1, characterized in that: A clamping cylinder (25) is installed at the bottom end of the clamping frame (4), and a drive shaft (26) is installed at the output end of the clamping cylinder (25). A limit arm (27) is symmetrically and movably mounted on the surface of the drive shaft (26). A clamping arm (28) is movably installed on the outer wall of the clamping frame (4) on one side of the limit arm (27).

7. A gear measuring device according to claim 6, characterized in that: Each clamping arm (28) has a power shaft (31) installed on the outer wall of the side near the clamping frame (4), and the clamping frame (4) is movably connected to the clamping arm (28) via the power shaft (31). Each limiting arm (27) has a transmission shaft (29) installed on the outer wall of the side near the clamping arm (28), and the limiting arm (27) is movably connected to the clamping arm (28) via the transmission shaft (29). Each clamping arm (28) has a clamping block (30) installed on the outer wall of the clamping arm (28).

8. A gear measuring device according to claim 1, characterized in that: The output of the control panel (11) is electrically connected to the input of the first cylinder (14), the electric push rod (17), the servo motor (34), the clamping cylinder (25), the power cylinder (22), the second cylinder (19), the computer (10), and the contact probe (8).