Gear precision testing device

Abstract

The invention belongs to the technical field of gear testing, and particularly relates to a gear precision testing device which comprises a machine cabinet and an operation table arranged on the machine cabinet, a conical clamp A and a measuring head are arranged on the machine cabinet in a sliding mode, and a detection table is rotationally arranged on the operation table; the gear precision testing device further comprises a sliding column, the sliding column is arranged on the detection table in a sliding mode, and a conical clamp B is arranged at the upper end of the sliding column. According to the gear precision testing device, through sliding of the sliding column on the detection table and combination of a linkage mechanism, when the sliding column descends, the lifting clamping piece can be driven to ascend, and vice versa, so that the gear precision testing device can adapt to gears of different heights; the trouble of replacing conical clamps or clamping jaw clamps with different heights is omitted, through cooperation of an L-shaped plate and a sliding column, after the lifting clamping piece descends to a designated position, the height of the sliding column can still be flexibly adjusted, and through the design, the adaptation flexibility of the device to workpieces with different specifications is further improved; and the position of the conical clamp B can be accurately adjusted according to actual detection requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gear testing, and particularly relates to a gear precision testing device. BACKGROUND

[0002] The gear precision testing device is a special equipment for detecting gear manufacturing precision, and can accurately measure key parameters such as gear pitch deviation, tooth profile deviation, spiral line deviation and tooth thickness deviation, thereby providing data support for gear quality control. The working principle of the device is mainly based on the combination of mechanical transmission and optical detection: the device fixes the measured gear on a rotating shaft through a precision clamp, and drives the gear to rotate stably by a driving system; at the same time, a detection unit approaches the gear tooth surface according to a preset trajectory, and a sensor captures the position change information of each measuring point of the tooth surface in real time during the rotation of the gear, and converts the change of these physical quantities into an electrical signal; the signal is transmitted to a data acquisition and analysis system after amplification, filtering and other processing, the system calculates and compares the data according to the gear precision standard, and finally outputs the deviation value of each precision parameter, thereby directly reflecting the manufacturing precision condition of the gear.

[0003] At present, in the gear precision detection work, in order to adapt to gears of different specifications, the testing device usually needs to be equipped with conical clamps and jaw clamps of different heights. In actual detection, the corresponding clamps need to be frequently replaced for different gears, and the whole replacement process is not only cumbersome to operate, but also consumes a lot of time, which seriously affects the detection efficiency. SUMMARY

[0004] The purpose of the application is to provide a gear precision testing device capable of quickly adapting to various gears to solve the above problems.

[0005] The application achieves the above purpose through the following technical solutions: A gear precision testing device, comprising a cabinet and an operation table arranged on the cabinet, wherein a conical clamp A and a measuring head are arranged on the cabinet in a sliding manner, and a detection table is arranged on the operation table in a rotating manner; Further comprising: A sliding column, which is arranged on the detection table in a sliding manner, and a conical clamp B is arranged on the upper end of the sliding column, wherein the conical clamp B cooperates with the conical clamp A to clamp the workpiece; A lifting clamping piece, which is arranged on the detection table in a sliding manner, and an adjusting mechanism is arranged on the lifting clamping piece, wherein the lifting clamping piece cooperates with the adjusting mechanism to clamp the workpiece; A linkage mechanism, which is connected between the lifting clamping piece and the sliding column, and the lifting clamping piece is lifted when the sliding column is lowered through the linkage mechanism.

[0006] As a further optimization scheme of the present application, the detection table comprises a hollow rod, the hollow rod is rotationally arranged on the operation table, the hollow rod is arrayed with movable grooves, the upper end of the hollow rod is provided with a table top, the table top is arrayed with avoiding grooves, the table top is provided with through holes, the hollow rod is provided with splines, the sliding column is arrayed with limiting grooves, and the sliding column is slidingly arranged in the hollow rod through the limiting grooves.

[0007] As a further optimization scheme of the present application, the lifting clamping piece comprises a base plate, the base plate is slidingly arranged on the spline, the base plate is fixedly provided with a mounting disc, the mounting disc is sleeved on the spline, the mounting disc is arrayed with sliding grooves, the sliding grooves are slidingly provided with clamping jaws, the clamping jaws are fixedly provided with embedded blocks, and the base plate is rotationally arranged with an action assembly.

[0008] As a further optimization scheme of the present application, the action assembly comprises a rotating disc, the rotating disc is rotationally arranged on the base plate, the rotating disc is fixedly provided with an internal tooth ring, the rotating disc is arrayed with arc-shaped grooves, and the embedded blocks are slidingly arranged in the arc-shaped grooves.

[0009] As a further optimization scheme of the present application, the linkage mechanism comprises a support rod, the support rod is arrayed and fixedly arranged on the hollow rod, the sliding column is fixedly provided with an L-shaped plate, the L-shaped plate is provided with an L-shaped groove, the lower surface of the base plate is fixedly provided with a horizontal plate, the horizontal plate is provided with a horizontal groove, the end of the support rod is rotationally connected with the middle of the connecting rod, one end of the connecting rod is slidingly arranged in the horizontal groove, and the other end of the connecting rod is slidingly arranged in the L-shaped groove.

[0010] As a further optimization scheme of the present application, the L-shaped groove comprises a horizontal segment and a vertical segment, and the horizontal groove is arranged in parallel with the horizontal segment.

[0011] As a further optimization scheme of the present application, the adjusting mechanism comprises a first vertical rod, the first vertical rod is rotationally arranged through the mounting disc, the upper end of the first vertical rod is fixedly provided with a worm gear, the mounting disc is rotationally arranged with a worm, the worm is engaged with the worm gear, the mounting disc is rotationally arranged with a second vertical rod, the second vertical rod and the worm are fixedly provided with bevel gears, the two bevel gears are engaged with each other, the second vertical rod penetrates the table top through the through hole, and the lower end of the second vertical rod is fixedly provided with a connecting gear, and the connecting gear is engaged with the internal tooth ring.

[0012] As a further optimization scheme of the present application, the lower surface of the operation table is fixedly provided with a servo motor, the output end of the servo motor is fixedly provided with a driving gear, the hollow rod is fixedly provided with a driven gear, and the driving gear is engaged with the driven gear.

[0013] As a further optimization scheme of the present application, a gas cylinder is fixedly arranged in the cabinet, and a rotating joint is rotatably arranged at the output end of the gas cylinder, and the gas cylinder is rotatably connected with the sliding column through the rotating joint.

[0014] As a further optimization scheme of the present application, an avoiding hole is formed on the operation table, and the lifting clamping piece penetrates through the operation table through the avoiding hole.

[0015] The present application has the following beneficial effects: 1. Different from the prior art, in actual use, through the sliding of the sliding column on the detection table, combined with the linkage mechanism, when the sliding column descends, the lifting clamping piece can be lifted, and vice versa, so as to adapt to gears of different heights, and the trouble of replacing different height conical clamps or jaw clamps is saved.

[0016] 2. Different from the prior art, in actual use, through the cooperation of the L-shaped plate and the sliding column, when the lifting clamping piece descends to the specified position, the height of the sliding column can still be flexibly adjusted, which 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. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the local structure of the operation table of the present application; Figure 3 is a schematic diagram of the connection structure of the detection table of the present application; Figure 4 is a schematic diagram of the explosion structure of the present application Figure 3 is a schematic diagram of the explosion structure of the present application Figure 5 is a schematic diagram of the explosion structure of the lifting clamping piece of the present application; Figure 6 is a schematic diagram of the explosion structure of the lifting clamping piece of the present application Figure 5 is a schematic diagram of the enlarged structure of A in the present application; Figure 7 is a schematic diagram of the structure of the mounting disc of the present application.

[0018] In the figure: 1, cabinet; 11, conical clamp A; 12, measuring head; 13, control module; 2, operation table; 21, avoiding hole; 3, detection table; 31, hollow rod; 311, movable slot; 32, table top; 321, through hole; 33, avoiding slot; 34, spline; 4, lifting clamp; 41, base plate; 42, mounting plate; 421, sliding slot; 43, action assembly; 431, rotating disc; 432, inner tooth ring; 433, arc slot; 44, clamping jaw; 441, embedded block; 5, sliding column; 51, conical clamp B; 52, limiting slot; 6, linkage mechanism; 61, supporting rod; 62, L-shaped plate; 621, L-shaped slot; 63, connecting rod; 64, cross plate; 641, cross slot; 7, adjusting mechanism; 71, vertical rod one; 711, worm gear; 712, connecting gear; 72, worm; 73, vertical rod two; 731, bevel gear; 8, servo motor; 81, driving gear; 82, driven gear; 9, air cylinder; 91, rotating joint. DETAILED DESCRIPTION

[0019] The application will be described in further detail below with reference to the drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0020] Example 1, as Figure 1 - Figure 7As shown, a gear precision testing device, including a cabinet 1 and a workbench 2 arranged on the cabinet 1, the lower surface of the workbench 2 is fixedly provided with a servo motor 8, the cabinet 1 is slidably provided with a conical clamp A11 and a measuring head 12 through an electric sliding rail, the workbench 2 is rotatably provided with a detection table 3, the detection table 3 is slidably provided with a sliding column 5, the upper end of the sliding column 5 is provided with a conical clamp B51, the conical clamp B51 cooperates with the conical clamp A11 to clamp the workpiece, a gas cylinder 9 is fixedly arranged in the cabinet 1, a rotary joint 91 is rotatably arranged at the output end of the gas cylinder 9, a control module 13 is arranged on the cabinet 1, and the control module 13 is electrically connected with the electric sliding rail, the servo motor 8, the gas cylinder 9 and the measuring head 12 (wherein the electric sliding rail is prior art, which will not be described in detail here), the gas cylinder 9 is rotatably connected with the sliding column 5 through the rotary joint 91, a lifting clamping piece 4 is slidably arranged on the detection table 3, an adjusting mechanism 7 is arranged on the lifting clamping piece 4, the lifting clamping piece 4 is clamped by cooperating with the adjusting mechanism 7, an avoiding hole 21 is formed in the workbench 2, the lifting clamping piece 4 penetrates through the workbench 2 through the avoiding hole 21, a linkage mechanism 6 is connected between the lifting clamping piece 4 and the sliding column 5, the lifting clamping piece 4 is lifted when the sliding column 5 is lowered through the linkage mechanism 6, the cabinet 1 serves as the bearing basis of the whole device and provides an installation platform for each component; the workbench 2 provides a stable working surface for detection operation, the avoiding hole 21 formed therein reserves sufficient space for the lifting movement of the lifting clamping piece 4 to avoid movement interference; the servo motor 8 provides power for the rotation of the detection table 3; the workpiece is clamped by the conical clamp A11 and the conical clamp B51, and then tested by cooperating with the measuring head 12, realizing the clamping and positioning of the gear with the inner hole as the reference and high-precision centering; the gas cylinder 9 drives the sliding column 5 to lift and lower through the rotary joint 91, the setting of the rotary joint 91 avoids the influence of torque on the gas cylinder 9 when the sliding column 5 rotates, ensuring the normal work of the gas cylinder 9; the lifting clamping piece 4 cooperates with the adjusting mechanism 7 to clamp the workpiece, realizing the clamping and positioning of the gear with the outer circle or end face as the reference and the inner hole not suitable for centering, and the linkage mechanism 6 realizes the linkage of the sliding column 5 and the lifting clamping piece 4, making their actions coordinated and facilitating the switching of different clamping modes.

[0021] As Figure 3 - Figure 4As shown, the detection table 3 comprises a hollow rod 31 rotatably arranged on the operation table 2, the hollow rod 31 is arrayed with movable grooves 311, the upper end of the hollow rod 31 is fixedly provided with a table top 32, the table top 32 is arrayed with avoiding grooves 33, the table top 32 is provided with through holes 321, the hollow rod 31 is provided with splines 34, the sliding column 5 is provided with a limiting groove 52, the hollow rod 31 is provided with a limiting block, the sliding column 5 is penetratingly and slidingly arranged in the hollow rod 31 under the cooperation of the limiting groove 52 and the limiting block, the output end of the servo motor 8 is fixedly provided with a driving gear 81, the hollow rod 31 is fixedly provided with a driven gear 82, the driving gear 81 is engaged with the driven gear 82, the hollow rod 31 is a core supporting component of the detection table 3, which is rotatably arranged on the operation table 2 and provides a basis for the overall rotation of the detection table 3; the movable grooves 311 can adapt to the action of other components to avoid interference; the table top 32 provides a placement basis for gear detection, and the avoiding grooves 33 and the through holes 321 respectively provide space for the action of the lifting and clamping piece 4 and the adjusting mechanism 7; the splines 34 not only provide precise guidance for the sliding of the lifting and clamping piece 4, but also ensure that the lifting and clamping piece 4 rotates synchronously with the hollow rod 31; the sliding column 5 slides in the hollow rod 31 through the limiting groove 52, and the limiting groove 52 ensures the stability and directionality of the sliding of the sliding column 5; the servo motor 8 transmits power to the hollow rod 31 through the engagement of the driving gear 81 and the driven gear 82, drives the detection table 3 and the workpiece to rotate synchronously, and provides conditions for the detection of the measuring head 12.

[0022] As shown in the figure, Figure 5 The lifting and clamping piece 4 comprises a base plate 41 slidingly arranged on the spline 34, the base plate 41 is fixedly provided with a mounting disc 42, the mounting disc 42 is sleeved on the spline 34, the mounting disc 42 is arrayed with sliding grooves 421, the sliding grooves 421 are slidingly provided with clamping jaws 44, the clamping jaws 44 are fixedly provided with embedded blocks 441, and the base plate 41 is rotatably provided with an action assembly 43, and the action assembly 43 comprises a rotating disc 431 rotatably arranged on the base plate 41, the rotating disc 431 is fixedly provided with an inner gear ring 432, the rotating disc 431 is arrayed with arc-shaped grooves 433, the embedded blocks 441 are slidingly arranged in the arc-shaped grooves 433, and the base plate 41 is slidingly arranged on the spline 34. The base plate 41 can stably ascend and descend under the guidance of the spline 34 and rotate synchronously with the hollow rod 31; the mounting disc 42 provides a mounting basis for the clamping jaws 44 and the action assembly 43; the sliding grooves 421 provide a track for the sliding of the clamping jaws 44 to ensure the accuracy of the movement of the clamping jaws 44; when the rotating disc 431 in the action assembly 43 rotates, the sliding cooperation of the arc-shaped grooves 433 and the embedded blocks 441 can push the clamping jaws 44 to slide inward or outward in the sliding grooves 421 simultaneously, realizing stable clamping or loosening of the workpiece; the inner gear ring 432 provides a transmission connection point for the rotation of the rotating disc 431, facilitating cooperation with the adjusting mechanism 7.

[0023] 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.

[0024] like Figure 5 - Figure 7As shown, the adjusting mechanism 7 comprises a first vertical rod 71 penetrating and rotatingly arranged on the mounting disc 42, a worm gear 711 fixedly arranged on the upper end of the first vertical rod 71, a worm 72 rotatingly arranged on the mounting disc 42 and engaged with the worm gear 711, a second vertical rod 73 rotatingly arranged on the mounting disc 42 and having two bevel gears 731 fixedly arranged on the worm 72 and the second vertical rod 73 respectively and engaged with each other, the second vertical rod 73 penetrating the tabletop 32 through the through hole 321, and a connecting gear 712 fixedly arranged on the lower end of the first vertical rod 71 and engaged with the inner tooth ring 432. The adjusting mechanism 7 provides power and transmission path for the clamping action of the clamping jaw 44. Rotating the second vertical rod 73 drives the worm 72 to rotate through the engagement of the bevel gears 731, and the engagement of the worm 72 and the worm gear 711 transmits the movement to the first vertical rod 71. The first vertical rod 71 drives the rotating disc 431 to rotate through the engagement of the connecting gear 712 and the inner tooth ring 432, so as to finally realize the clamping or loosening of the clamping jaw 44. The cooperation of the worm gear 711 and the worm 72 has self-locking function, which can ensure the stability of the clamping jaw 44 clamping the workpiece and avoid accidental loosening. The second vertical rod 73 penetrates the tabletop 32, which is convenient for the operator to operate above the tabletop 32 and improves the convenience of operation.

[0025] It should be noted that the working principle of the gear precision testing device is that the whole device is based on the cabinet 1 as the bearing basis, the operation table 2 is fixedly arranged on the cabinet 1, and the detection table 3 is rotatingly installed on the operation table 2 through the hollow rod 31 at the bottom of the detection table 3. The hollow rod 31 is processed with a spline 34 to provide guidance for the sliding of the lifting clamping piece 4. At the same time, the tabletop 32 at the upper end of the hollow rod 31 is provided with a avoiding groove 33 and a through hole 321 to adapt to the action space of each component. When working, if the workpiece needs to be clamped by the lifting clamping piece 4, the cylinder 9 in the cabinet 1 is started, and the output end drives the sliding column 5 to descend through the rotating joint 91. The setting of the rotating joint 91 can avoid the influence of the torque generated by the rotating sliding column 5 on the cylinder 9. When the sliding column 5 descends, the fixed L-shaped plate 62 on the sliding column 5 also descends synchronously. At this time, the L-shaped groove 621 of the L-shaped plate 62 is in the state of cooperation with the horizontal section. In the linkage mechanism 6, the support rods 61 are arrayed and fixed on the hollow rod 31, and the end of the connecting rod 63 rotatingly connected with the support rods 61 is embedded in the L-shaped groove 621, and the other end is slid into the horizontal groove 641 of the horizontal plate 64 (the horizontal groove 641 is parallel to the horizontal section of the L-shaped groove 621). With the descending of the L-shaped plate 62, the connecting rod 63 rotates around the end of the support rod 61, pushes the horizontal plate 64 to rise through the horizontal groove 641, and further drives the bottom disc 41 fixed with the horizontal plate 64 to rise. In this process, the bottom disc 41 is slidingly matched with the hollow rod 31 through the spline 34, so as to ensure the stability of the rising process and ensure that the bottom disc 41 rotates synchronously with the hollow rod 31. When the lifting clamping piece 4 rises to the appropriate height, the workpiece can be clamped by the adjusting mechanism 7 driving the clamping jaw 44: the worker rotates the vertical rod two 73 penetrating the table top 32, the bevel gear 731 on the vertical rod two 73 drives the worm 72 on the mounting disc 42 to rotate (both are meshed through the bevel gear 731), the worm 72 is meshed with the worm gear 711 on the upper end of the vertical rod one 71, thereby driving the vertical rod one 71 to rotate, the connecting gear 712 on the lower end of the vertical rod one 71 is meshed with the inner tooth ring 432 of the rotating disc 431, and finally the rotating disc 431 is driven to rotate on the base plate 41. The array of arc-shaped grooves 433 on the rotating disc 431 is in sliding fit with the embedded blocks 441 of the clamping jaw 44, with the rotating of the rotating disc 431, the arc-shaped grooves 433 push the clamping jaw 44 to slide inward in the sliding groove 421 of the mounting disc 42 through the embedded blocks 441, so as to realize the stable clamping of the workpiece. If it is needed to switch to the conical clamp B51 cooperating with the conical clamp A11 to clamp the workpiece, the cylinder 9 drives the sliding column 5 to rise, at this time, the L-shaped plate 62 moves up, and the lifting clamping piece 4 will be lowered synchronously (the principle is opposite to the rising process), until the connecting rod 63 slides to the vertical section in the L-shaped groove 621, after entering the vertical section, the connecting rod 63 only moves vertically with the L-shaped plate 62 and no longer pushes the horizontal plate 64, the position of the lifting clamping piece 4 remains stable, and the sliding column 5 can continue to rise. In this way, it can avoid the position interference with the conical clamp B51 and the workpiece to be clamped, provide sufficient space for the conical clamp B51 to clamp the workpiece, ensure smooth switching of the two clamping modes, and adapt to gears of various specifications without replacing the clamp, thereby improving the adaptive flexibility of the device to gears of different heights.

[0026] During detection, the servo motor 8 on the lower surface of the operation table 2 is started, the drive gear 81 at the output end of the servo motor 8 drives the driven gear 82 on the hollow rod 31 to rotate, so that the hollow rod 31 rotates synchronously with the detection table 3 and the workpiece, and the measuring head 12 can detect the precision of the gear workpiece in the rotating process. During the whole process, the avoiding hole 21 of the operation table 2 provides sufficient space for the lifting and lowering of the lifting clamping piece 4.

[0027] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A gear precision testing device, comprising a cabinet and an operation table arranged on the cabinet, wherein a conical clamp A and a measuring head are arranged on the cabinet in a sliding manner, characterized in that: The operation table is rotationally provided with a detection table; Further comprising: A sliding column is slidingly arranged on the detection table, and a conical clamp B is arranged at the upper end of the sliding column, which cooperates with the conical clamp A to clamp the workpiece; A lifting clamp is slidingly arranged on the detection table, and an adjusting mechanism is arranged on the lifting clamp, which cooperates with the lifting clamp to clamp the workpiece; A linkage mechanism is connected between the lifting clamp and the sliding column, which enables the lifting clamp to rise when the sliding column descends.

2. A gear precision testing device according to claim 1, characterized in that: The detection table comprises a hollow rod rotationally arranged on the operation table, and the hollow rod is arrayed with movable grooves, the upper end of the hollow rod is provided with a table top, the table top is arrayed with avoiding grooves, the table top is provided with through holes, the hollow rod is provided with splines, the sliding column is slidingly arranged in the hollow rod through the limiting grooves.

3. A gear precision testing device according to claim 2, characterized in that: The lifting clamp comprises a base plate slidingly arranged on the spline, the base plate is fixedly provided with a mounting disc, the mounting disc is sleeved on the spline, the mounting disc is arrayed with sliding grooves, the sliding grooves are slidingly arranged with clamping jaws, the clamping jaws are fixedly provided with embedded blocks, and the base plate is rotationally arranged with an action assembly.

4. A gear precision testing device according to claim 3, wherein: The action assembly comprises a rotating disc rotationally arranged on the base plate, the rotating disc is fixedly provided with an internal gear ring, the rotating disc is arrayed with arc-shaped grooves, and the embedded blocks are slidingly arranged in the arc-shaped grooves.

5. A gear precision testing device according to claim 3, wherein: The linkage mechanism comprises a support rod arrayed and fixedly arranged on the hollow rod, an L-shaped plate is fixedly arranged on the sliding column, the L-shaped plate is provided with an L-shaped groove, the lower surface of the base plate is fixedly provided with a horizontal plate, the horizontal plate is provided with a horizontal groove, the end of the support rod is rotationally connected with the middle of the connecting rod, one end of the connecting rod is slidingly arranged in the horizontal groove, and the other end of the connecting rod is slidingly arranged in the L-shaped groove.

6. A gear precision testing device according to claim 5, wherein: The L-shaped groove comprises a horizontal segment and a vertical segment, and the horizontal groove is arranged in parallel with the horizontal segment.

7. The gear precision testing device of claim 3, wherein: The adjusting mechanism comprises a vertical rod one rotationally arranged through the mounting disc, the upper end of the vertical rod one is fixedly provided with a worm gear, the mounting disc is rotationally arranged with a worm, the worm is engaged with the worm gear, the mounting disc is rotationally arranged with a vertical rod two, the vertical rod two and the worm are fixedly provided with bevel gears, the two bevel gears are engaged with each other, the vertical rod two penetrates the table top through the through hole, the lower end of the vertical rod two is fixedly provided with a connecting gear, and the connecting gear is engaged with the internal gear ring.

8. The gear precision testing device of claim 2, wherein: A servo motor is fixedly arranged on the lower surface of the operation table, a driving gear is fixedly arranged on the output end of the servo motor, a driven gear is fixedly arranged on the hollow rod, and the driving gear is engaged with the driven gear.

9. The gear precision testing device of claim 1, wherein: A cylinder is fixedly arranged in the cabinet, a rotating joint is rotationally arranged on the output end of the cylinder, and the cylinder is rotationally connected with the sliding column through the rotating joint.

10. The gear precision testing device of claim 1, wherein: An avoiding hole is arranged on the operation table, and the lifting clamp penetrates the operation table through the avoiding hole.

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