Gear precision testing device

Abstract

The present application belongs to the technical field of gear testing, and particularly relates to a gear precision testing device, which comprises a cabinet and an operation table arranged on the cabinet, a conical clamp A and a measuring head are arranged on the cabinet in a sliding mode, and a detection table is arranged on the operation table in a rotating mode; further comprising a sliding column arranged on the detection table in a sliding mode, and a conical clamp B is arranged on the upper end of the sliding column; the gear precision testing device is capable of driving the lifting clamping piece to rise when the sliding column is lowered by sliding on the detection table in combination with a linkage mechanism, and vice versa, so as to adapt to gears of different heights, and the trouble of replacing conical clamps or jaw clamps of different heights is saved; the height of the sliding column can still be flexibly adjusted after the lifting clamping piece is lowered to a specified position by cooperation of the L-shaped plate and the sliding column, and the design further improves the adaptive flexibility of the device to workpieces of different specifications, and facilitates accurate adjustment of the position of the conical clamp B according to actual detection requirements.

Description

Technical Field

[0001] This invention belongs to the field of gear testing technology, and specifically relates to a gear accuracy testing device. Background Technology

[0002] Gear precision testing devices are specialized equipment used to inspect the manufacturing precision of gears. They can accurately measure key parameters such as tooth pitch deviation, tooth profile deviation, helix deviation, and tooth thickness deviation, providing data support for gear quality control. Their working principle is primarily based on a combination of mechanical transmission and optical detection: the device uses precision fixtures to fix the gear under test on a rotating shaft, which is then driven by a drive system to rotate smoothly. Simultaneously, the detection unit approaches the gear tooth surface along a preset trajectory. During gear rotation, sensors capture real-time positional changes at various measuring points on the tooth surface and convert these physical changes into electrical signals. After amplification and filtering, the signals are transmitted to a data acquisition and analysis system. The system calculates and compares the data according to gear precision standards, ultimately outputting the deviation values ​​of each precision parameter, directly reflecting the gear's manufacturing precision.

[0003] Currently, in gear precision testing, testing equipment typically needs to be equipped with conical clamps and jaw clamps of different heights to accommodate gears of different specifications. During actual testing, the corresponding clamps need to be changed frequently for different gears. This process is not only cumbersome but also time-consuming, severely impacting testing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a gear accuracy testing device that can quickly adapt to various types of gears in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A gear precision testing device includes a cabinet and an operating table mounted on the cabinet. A conical clamp A and a probe are slidably mounted on the cabinet, and a testing table is rotatably mounted on the operating table.

[0007] It also includes:

[0008] A sliding column is slidably mounted on the inspection table, and a conical clamp B is provided at the upper end of the sliding column. The conical clamp B cooperates with the conical clamp A to clamp the workpiece.

[0009] A lifting clamping component is slidably mounted on a testing table. The lifting clamping component is equipped with an adjustment mechanism, which cooperates with the lifting clamping component to enable the lifting clamping component to clamp the workpiece.

[0010] A linkage mechanism is connected between the lifting clamp and the sliding column. The linkage mechanism enables the lifting clamp to rise when the sliding column descends.

[0011] As a further optimization of the present invention, the detection platform includes a hollow rod, which is rotatably mounted on the operating platform. The hollow rod has an array of movable grooves, and a platform is provided at the upper end of the hollow rod. The platform has an array of clearance grooves and a through hole. The hollow rod has a spline, and the sliding column has a limiting groove. The sliding column is slidably mounted in the hollow rod through the limiting groove.

[0012] As a further optimization of the present invention, the lifting clamping component includes a chassis, the chassis is slidably disposed on a spline, a mounting plate is fixedly disposed on the chassis, the mounting plate is sleeved on the spline, the mounting plate has an array of sliding grooves, a gripper is slidably disposed in the sliding groove, an embedded block is fixedly disposed on the gripper, and an actuating component is rotatably disposed in the chassis.

[0013] As a further optimization of the present invention, the actuation component includes a rotating disk, which is rotatably mounted on a chassis. An internal toothed ring is fixedly mounted on the rotating disk, and an array of arc-shaped grooves are formed on the rotating disk. The embedded block is slidably mounted in the arc-shaped grooves.

[0014] As a further optimization of the present invention, the linkage mechanism includes a support rod, the support rod array is fixedly mounted on a hollow rod, an L-shaped plate is fixedly mounted on the sliding column, an L-shaped groove is formed on the L-shaped plate, a horizontal plate is fixedly mounted on the lower surface of the chassis, a horizontal groove is formed on the horizontal plate, the end of the support rod is rotatably connected to the middle of the connecting rod, one end of the connecting rod is slidably mounted in the horizontal groove, and the other end of the connecting rod is slidably mounted in the L-shaped groove.

[0015] As a further optimization of the present invention, the L-shaped groove includes a horizontal section and a vertical section, and the horizontal groove is arranged parallel to the horizontal section.

[0016] As a further optimization of the present invention, the adjusting mechanism includes a first upright rod, which is rotatably mounted on a mounting plate. A worm gear is fixedly mounted on the upper end of the first upright rod, and a worm is rotatably mounted on the mounting plate, the worm meshing with the worm gear. A second upright rod is rotatably mounted on the mounting plate, and bevel gears are fixedly mounted on both the second upright rod and the worm, the two bevel gears meshing with each other. The second upright rod passes through a through hole through the platform, and a connecting gear is fixedly mounted on the lower end of the second upright rod, the connecting gear meshing with an internal gear ring.

[0017] As a further optimization of the present invention, a servo motor is fixedly installed on the lower surface of the operating table, a drive gear is fixedly installed at the output end of the servo motor, and a driven gear is fixedly installed on the hollow rod, with the drive gear meshing with the driven gear.

[0018] As a further optimization of the present invention, a cylinder is fixedly installed inside the cabinet, and a rotary joint is rotatably provided at the output end of the cylinder. The cylinder is rotatably connected to the sliding column through the rotary joint.

[0019] As a further optimization of the present invention, the operating table is provided with a clearance hole, and the lifting clamping member passes through the clearance hole through the operating table.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. Unlike existing technologies, in actual use, the sliding column slides on the testing table, combined with the linkage mechanism. When the sliding column descends, it can drive the lifting clamp to rise, and vice versa. This allows it to adapt to gears of different heights, eliminating the hassle of replacing conical clamps or jaw clamps of different heights.

[0022] 2. Unlike existing technologies, in actual use, through the cooperation of the L-shaped plate and the sliding column, the height of the sliding column can still be flexibly adjusted after the lifting clamping part is lowered to the designated position. This design further enhances the device's adaptability to workpieces of different specifications, making it easy to accurately adjust the position of the conical clamp B according to actual testing needs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a partial cross-sectional view of the operating table of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection structure of the detection station of the present invention;

[0026] Figure 4 This is the present invention. Figure 3 Explosion structure diagram;

[0027] Figure 5 This is an exploded view of the lifting clamping component of the present invention;

[0028] Figure 6 This is the present invention. Figure 5 Enlarged structural diagram at point A in the middle;

[0029] Figure 7 This is a schematic diagram of the installation disk structure of the present invention.

[0030] In the diagram: 1. Cabinet; 11. Conical clamp A; 12. Probe; 13. Control module; 2. Operating table; 21. Clearance hole; 3. Testing table; 31. Hollow rod; 311. Movable groove; 32. Table surface; 321. Through hole; 33. Clearance groove; 34. Spline; 4. Lifting clamp; 41. Chassis; 42. Mounting plate; 421. Slide groove; 43. Motion assembly; 431. Rotating plate; 432. Internal gear ring; 433. Arc groove; 44. Gripper; 441 5. Embedded block; 6. Sliding column; 7. Conical clamp B; 8. Restricting groove; 9. Linkage mechanism; 10. Support rod; 11. L-shaped plate; 12. L-shaped groove; 13. Connecting rod; 14. Horizontal plate; 15. Horizontal groove; 16. Adjustment mechanism; 17. Upright rod one; 18. Worm gear; 19. Connecting gear; 10. Worm; 11. Upright rod two; 12. Bevel gear; 13. Servo motor; 14. Drive gear; 15. Driven gear; 16. Cylinder; 17. Rotary joint. Detailed Implementation

[0031] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] Example 1, such as Figure 1 - Figure 7As shown, a gear precision testing device includes a cabinet 1 and an operating platform 2 mounted on the cabinet 1. A servo motor 8 is fixedly mounted on the lower surface of the operating platform 2. A conical clamp A11 and a probe 12 are slidably mounted on the cabinet 1 via an electric slide rail. A testing platform 3 is rotatably mounted on the operating platform 2, and a sliding column 5 is slidably mounted on the testing platform 3. A conical clamp B51 is mounted on the upper end of the sliding column 5. The conical clamp B51 cooperates with the conical clamp A11 to clamp the workpiece. A cylinder 9 is fixedly mounted inside the cabinet 1, and a rotary joint 91 is rotatably mounted on the output end of the cylinder 9. The cabinet 1 is equipped with... A control module 13 is provided, which is electrically connected to the electric slide rail, servo motor 8, cylinder 9, and probe 12 (the electric slide rail is existing technology and will not be described in detail here). The cylinder 9 is rotatably connected to the sliding column 5 via a rotary joint 91. A lifting clamping member 4 is slidably mounted on the detection table 3, and an adjustment mechanism 7 is provided on the lifting clamping member 4. The adjustment mechanism 7 cooperates with the lifting clamping member 4 to allow the lifting clamping member 4 to clamp the workpiece. An clearance hole 21 is provided on the operating table 2, through which the lifting clamping member 4 passes through the clearance hole 21. A linkage mechanism 6 connects the holding member 4 and the sliding column 5. This linkage mechanism 6 allows the lifting clamping member 4 to rise when the sliding column 5 descends. The cabinet 1 serves as the supporting foundation for the entire device, providing an installation platform for all components. The operating table 2 provides a stable working surface for the testing operation, and its clearance hole 21 provides sufficient space for the lifting clamping member 4 to move, avoiding interference. The servo motor 8 provides power for the rotation of the testing table 3. The workpiece is clamped by the conical clamps A11 and B51, thus cooperating with the probe 12 to measure the workpiece. The test achieves clamping and positioning of gears that require high-precision centering with the inner hole as the reference. The cylinder 9 drives the sliding column 5 to rise and fall through the rotary joint 91. The setting of the rotary joint 91 avoids the torque effect on the cylinder 9 when the sliding column 5 rotates, ensuring the normal operation of the cylinder 9. The lifting clamping component 4 cooperates with the adjustment mechanism 7 to clamp the workpiece, realizing the clamping and positioning of gears with the outer circle or end face as the reference and the inner hole that is not suitable for centering. The linkage mechanism 6 realizes the linkage between the sliding column 5 and the lifting clamping component 4, making their actions coordinated and facilitating the switching of different clamping methods.

[0033] like Figure 3 - Figure 4As shown, the testing table 3 includes a hollow rod 31, which is rotatably mounted on the operating table 2. The hollow rod 31 has an array of movable slots 311. A table surface 32 is fixedly mounted on the upper end of the hollow rod 31, and an array of clearance slots 33 and through holes 321 are provided on the table surface 32. A spline 34 is provided on the hollow rod 31, and a limiting slot 52 is provided on the sliding column 5. A limiting block is provided inside the hollow rod 31. The sliding column 5 is slidably mounted through the hollow rod 31 under the cooperation of the limiting slot 52 and the limiting block. A drive gear 81 is fixedly mounted on the output end of the servo motor 8, and a driven gear 82 is fixedly mounted on the hollow rod 31. The drive gear 81 and the driven gear 82 mesh. The hollow rod 31 is the core supporting component of the testing table 3, and its rotation is set... On the operating table 2, the overall rotation of the inspection table 3 is provided; the movable groove 311 can adapt to the movement of other components and avoid interference; the table surface 32 provides a placement basis for gear inspection, and the clearance groove 33 and the through hole 321 provide space for the movement of the lifting clamp 4 and the adjustment mechanism 7, respectively; the spline 34 not only provides precise guidance for the sliding of the lifting clamp 4, but also ensures that the lifting clamp 4 rotates synchronously with the hollow rod 31; the sliding column 5 slides in the hollow rod 31 through the limiting groove 52, which ensures the stability and directionality of the sliding column 5; the servo motor 8 transmits power to the hollow rod 31 through the meshing of the drive gear 81 and the driven gear 82, driving the inspection table 3 and the workpiece to rotate synchronously, providing conditions for the inspection of the probe 12.

[0034] like Figure 5 As shown, the lifting clamping component 4 includes a chassis 41, which is slidably mounted on a spline 34. A mounting plate 42 is fixedly mounted on the chassis 41 and sleeved on the spline 34. The mounting plate 42 has an array of grooves 421, and a gripper 44 is slidably mounted in the grooves 421. An insert block 441 is fixedly mounted on the gripper 44. An actuating component 43 is rotatably mounted in the chassis 41, and the actuating component 43 includes a rotating disk 431, which is rotatably mounted on the chassis 41. An internal gear ring 432 is fixedly mounted on the rotating disk 431, and an array of arc-shaped grooves 433 are formed on the rotating disk 431. The insert block 441 is slidably mounted in the arc-shaped grooves 433. The chassis 41 is slidably mounted on the spline 34. Under the guidance of the spline 34, the chassis 41 can be stably raised and lowered and rotated synchronously with the hollow rod 31. The mounting plate 42 provides a mounting base for the gripper 44 and the actuation component 43. The slide groove 421 provides a track for the sliding of the gripper 44, ensuring the accuracy of the gripper 44's movement. When the rotating disk 431 in the actuation component 43 rotates, the sliding cooperation between the arc groove 433 and the embedded block 441 can push the gripper 44 to slide synchronously inward or outward in the slide groove 421, realizing stable clamping or release of the workpiece. The internal gear ring 432 provides a transmission connection point for the rotation of the rotating disk 431, which is convenient for cooperation with the adjustment mechanism 7.

[0035] like Figure 3 - Figure 4 As shown, the linkage mechanism 6 includes a support rod 61, which is fixedly arranged in an array on the hollow rod 31. An L-shaped plate 62 is fixedly arranged on the sliding column 5 and slidably arranged in the movable groove 311. An L-shaped groove 621 is opened on the L-shaped plate 62. A horizontal plate 64 is fixedly arranged on the lower surface of the chassis 41 and has a horizontal groove 641. The end of the support rod 61 is rotatably connected to the middle of the connecting rod 63. One end of the connecting rod 63 is slidably arranged in the horizontal groove 641, and the other end of the connecting rod 63 is slidably arranged in the L-shaped groove 621. The L-shaped groove 621 includes a horizontal section and a vertical section. The horizontal groove 641 is arranged parallel to the horizontal section. The support rod 61 is fixed on the hollow rod 31, providing a fulcrum for the rotation of the connecting rod 63. The L-shaped plate 62 moves synchronously with the sliding column 5, and its L-shaped groove 621 is connected to the horizontal column 31. The linkage 63 enables the linkage between the sliding column 5 and the lifting clamping component 4. When the sliding column 5 descends, the linkage 63 slides within the horizontal section of the L-shaped groove 621, pushing the horizontal plate 64 upward through the transverse groove 641, thereby causing the lifting clamping component 4 to rise. When the sliding column 5 rises, the linkage 63 slides along the horizontal section to the vertical section, thereby causing the lifting clamping component 4 to descend. When the sliding column 5 rises to a certain extent, the linkage 63 enters the vertical section of the L-shaped groove 621. At this point, the linkage 63 only moves vertically with the sliding column 5 and no longer pushes the horizontal plate 64. The position of the lifting clamping component 4 remains stable, and the sliding column 5 can continue to rise, facilitating the switch to the conical clamp B51 to clamp the workpiece. The transverse groove 641 and the horizontal section of the L-shaped groove 621 are set parallel to each other, ensuring effective force transmission and coordinated movement.

[0036] like Figure 5 - Figure 7As shown, the adjusting mechanism 7 includes a first upright 71, which is rotatably mounted on the mounting plate 42. A worm gear 711 is fixedly mounted on the upper end of the first upright 71. A worm 72 is rotatably mounted on the mounting plate 42, and the worm 72 meshes with the worm gear 711. A second upright 73 is rotatably mounted on the mounting plate 42. Both the second upright 73 and the worm 72 are fixedly mounted with bevel gears 731, which mesh with each other. The second upright 73 passes through the platform 32 through a through hole 321. A connecting gear 712 is fixedly mounted on the lower end of the first upright 71, and the connecting gear 712 meshes with an internal gear ring 432. The adjusting mechanism 7 is a gripper 4. The clamping action of clamp 44 provides power and transmission path. Rotating the second upright 73 drives the worm 72 to rotate through the meshing of the bevel gear 731. The meshing of the worm 72 and the worm wheel 711 transmits the motion to the first upright 71. The first upright 71 drives the rotating disk 431 to rotate through the meshing of the connecting gear 712 and the internal gear ring 432, ultimately realizing the clamping or releasing of the clamp 44. The cooperation between the worm wheel 711 and the worm 72 has a self-locking function, which can ensure the stability of the clamp 44 in clamping the workpiece and avoid accidental loosening. The second upright 73 is set through the table 32, which makes it convenient for the operator to operate above the table 32 and improves the convenience of operation.

[0037] It should be noted that the working principle of the gear precision testing device is as follows: the entire device is based on the cabinet 1, the operating table 2 is fixedly set on the cabinet 1, and the testing table 3 is rotatably mounted on the operating table 2 through the hollow rod 31 at its bottom. The hollow rod 31 is machined with splines 34 to provide guidance for the sliding of the lifting clamping part 4. At the same time, the table surface 32 at the upper end of the hollow rod 31 is provided with a relief groove 33 and a through hole 321 to accommodate the movement space of each component.

[0038] During operation, if the workpiece needs to be clamped by the lifting clamp 4, the cylinder 9 inside the cabinet 1 is activated. Its output end drives the sliding column 5 to descend through the rotary joint 91. The rotary joint 91 is designed to avoid the torque effect on the cylinder 9 when the sliding column 5 rotates. When the sliding column 5 descends, the L-shaped plate 62 fixed on it moves down synchronously. At this time, the L-shaped groove 621 of the L-shaped plate 62 is in the horizontal section and cooperates with the connecting rod 63. In the linkage mechanism 6, the support rods 61 are arrayed and fixed on the hollow rod 31. The connecting rod 63 rotatably connected at its end is embedded in the L-shaped groove 621 at one end and slides into the horizontal groove 641 of the horizontal plate 64 at the other end (the horizontal groove 641 is parallel to the horizontal section of the L-shaped groove 621). As the L-shaped plate 62 descends, the connecting rod 63 rotates around the end of the support rod 61 and pushes the horizontal plate 64 to rise through the horizontal groove 641, thereby driving the chassis 41 fixed to the horizontal plate 64 to rise. During this process, the chassis 41 slides with the hollow rod 31 through the spline 34 to ensure the stability of the rising process and to ensure that the chassis 41 rotates synchronously with the hollow rod 31.

[0039] After the lifting clamping component 4 rises to the appropriate height, the clamping jaws 44 can be driven by the adjustment mechanism 7 to clamp the workpiece. The operator rotates the second upright 73 that passes through the table 32. The bevel gear 731 on the second upright 73 drives the worm gear 72 on the mounting plate 42 to rotate (the two mesh through the bevel gear 731). The worm gear 72 meshes with the worm wheel 711 at the upper end of the first upright 71, thereby driving the first upright 71 to rotate. The connecting gear 712 at the lower end of the first upright 71 meshes with the internal gear ring 432 of the rotating plate 431, ultimately driving the rotating plate 431 to rotate on the chassis 41. The arc-shaped grooves 433 arrayed on the rotating plate 431 slide in cooperation with the insert blocks 441 of the clamping jaws 44. As the rotating plate 431 rotates, the arc-shaped grooves 433 push the clamping jaws 44 to slide inward synchronously in the sliding grooves 421 of the mounting plate 42 through the insert blocks 441, thereby achieving stable clamping of the workpiece.

[0040] If it is necessary to switch to the use of conical clamp B51 and conical clamp A11 to clamp the workpiece, cylinder 9 drives sliding column 5 to rise. At this time, L-shaped plate 62 moves upward, and lifting clamping component 4 will descend synchronously (the principle is the opposite of the rising process) until connecting rod 63 slides into the vertical section in L-shaped groove 621. After entering the vertical section, connecting rod 63 only moves vertically with L-shaped plate 62 and no longer pushes horizontal plate 64. The position of lifting clamping component 4 remains stable, and sliding column 5 can continue to rise. This avoids positional interference between it and conical clamp B51 and the workpiece to be clamped, freeing up sufficient space for conical clamp B51 to clamp the workpiece, ensuring smooth switching between the two clamping methods, and adapting to various specifications of gears without changing the clamps, thus improving the device's adaptability to gears of different heights.

[0041] During testing, the servo motor 8 on the lower surface of the operating table 2 is started, and the drive gear 81 at its output end drives the driven gear 82 on the hollow rod 31 to rotate, so that the hollow rod 31, together with the testing table 3 and the workpiece, rotate synchronously. The probe 12 can then perform precision testing on the gear workpiece during the rotation process. Throughout the process, the clearance hole 21 of the operating table 2 provides sufficient space for the lifting and lowering of the lifting clamp 4.

[0042] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A gear precision testing device, comprising a cabinet and an operating table mounted on the cabinet, wherein a conical clamp A and a probe are slidably mounted on the cabinet, characterized in that: A detection platform is rotatably mounted on the operating table; It also includes: A sliding column is slidably mounted on the inspection table, and a conical clamp B is provided at the upper end of the sliding column. The conical clamp B cooperates with the conical clamp A to clamp the workpiece. A lifting clamping component is slidably mounted on a testing table. The lifting clamping component is equipped with an adjustment mechanism, which cooperates with the lifting clamping component to enable the lifting clamping component to clamp the workpiece. A linkage mechanism is provided, which connects the lifting clamping member and the sliding column. The lifting clamping member can be raised when the sliding column is lowered. The testing platform includes a hollow rod, which is rotatably mounted on the operating platform. The hollow rod has an array of movable slots, and a platform is provided at the upper end of the hollow rod. The platform has an array of clearance slots and a through hole. The hollow rod has a spline, and a sliding column has a limiting slot. The sliding column is slidably mounted in the hollow rod through the limiting slot. The lifting clamping component includes a chassis, which is slidably mounted on a spline. A mounting plate is fixedly mounted on the chassis and sleeved on the spline. Slide grooves are arrayed on the mounting plate, and grippers are slidably mounted in the slide grooves. An embedded block is fixedly mounted on the grippers, and an actuating component is rotatably mounted in the chassis. The linkage mechanism includes a support rod, the support rod array is fixedly mounted on a hollow rod, an L-shaped plate is fixedly mounted on the sliding column, an L-shaped groove is opened on the L-shaped plate, a horizontal plate is fixedly mounted on the lower surface of the chassis, a horizontal groove is opened on the horizontal plate, the end of the support rod is rotatably connected to the middle of the connecting rod, one end of the connecting rod is slidably mounted in the horizontal groove, and the other end of the connecting rod is slidably mounted in the L-shaped groove; The L-shaped groove includes a horizontal section and a vertical section, with the horizontal groove arranged parallel to the horizontal section.

2. The gear precision testing device according to claim 1, characterized in that: The actuation component includes a rotating disk, which is rotatably mounted on a chassis. An internal toothed ring is fixedly mounted on the rotating disk, and an array of arc-shaped grooves are formed on the rotating disk. The embedded block is slidably mounted in the arc-shaped grooves.

3. The gear precision testing device according to claim 1, characterized in that: The adjustment mechanism includes a first upright rod, which is rotatably mounted on a mounting plate. A worm gear is fixedly mounted on the upper end of the first upright rod. A worm is rotatably mounted on the mounting plate and meshes with the worm gear. A second upright rod is rotatably mounted on the mounting plate. Both the second upright rod and the worm are fixedly mounted with bevel gears that mesh with each other. The second upright rod passes through a through hole through the platform. A connecting gear is fixedly mounted on the lower end of the second upright rod and meshes with an internal gear ring.

4. The gear precision testing device according to claim 1, characterized in that: A servo motor is fixedly installed on the lower surface of the operating table, a drive gear is fixedly installed at the output end of the servo motor, and a driven gear is fixedly installed on the hollow rod. The drive gear meshes with the driven gear.

5. The gear precision testing device according to claim 1, characterized in that: A cylinder is fixedly installed inside the cabinet. The output end of the cylinder is rotatably connected to a sliding column through the rotatable joint.

6. The gear precision testing device according to claim 1, characterized in that: The operating platform is provided with a clearance hole, and the lifting clamping component passes through the clearance hole to penetrate the operating platform.

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