Bevel gear backlash automatic measuring device

Abstract

A bevel gear backlash automatic measuring device relates to the technical field of gear measurement. In order to solve the problems that most existing bevel gear assembly detection methods are manually operated, so that the working efficiency is low, and the requirement of large-scale automatic production cannot be met, the invention further provides a bevel gear backlash automatic measuring device. The device comprises a test piece installation platform and two driving assemblies, a test piece is clamped on a middle step layer of the horizontal end face of the test piece installation platform, the driving assemblies are arranged on an upper step layer and a lower step layer of the horizontal end face of the test piece installation platform, and execution mechanisms are arranged on the driving assemblies. The driving assembly drives the executing mechanisms to move in the length direction, the width direction and the height direction of the device, the executing mechanisms on the upper step layer are vertically arranged downwards, and the executing mechanisms on the lower step layer are horizontally arranged inwards. The device is used for automatically measuring the gear backlash of the bevel gear, and also has the function of automatically measuring the axial displacement of transmission equipment.

Description

Technical Field

[0001] This invention relates to the field of gear measurement technology, and specifically to an automatic measuring device for bevel gear tooth backlash. Background Technology

[0002] Bevel gear transmissions are one of the key testing technologies in the field of gear transmission, and are widely used in various transmission fields such as aviation, marine, metallurgy, fluid transportation, and petroleum production. Tooth backlash is a crucial parameter in gear transmission; too little backlash can lead to gear overheating, jamming, or even damage; too much backlash can cause impact, noise, and wear. Therefore, after the bevel gear transmission is assembled, its tooth backlash must be measured to ensure smooth gear transmission, low noise, and long service life.

[0003] Currently, commonly used gear inspection methods include dial indicator method, lead weight method, feeler gauge method, and indirect calculation method. For measuring the tooth backlash of bevel gears, the dial indicator method is the preferred, most standard, and most professional method. It offers high accuracy, quantifiability, and good repeatability. Through standardized operation and accurate data recording, it can ensure that the gear pair is in optimal working condition, extending its service life. The disadvantages of the dial indicator method are its low efficiency and the need for sufficient space to install the dial indicator.

[0004] With the rapid rise of automated production lines in my country, product quality and consistency have been significantly improved, and production and assembly efficiency have been greatly enhanced. Production activities are transforming into highly stable, efficient, and controllable systems that rely on "technology and data." Therefore, this invention aims to solve the weak link of low efficiency in bevel gear assembly, namely gear clearance measurement, thereby improving the overall production efficiency of the assembly.

[0005] The automatic bevel gear backlash measurement device is a key piece of equipment for modern intelligent manufacturing and quality control. By integrating precision mechanics, automatic control, sensor technology and software algorithms, it achieves high-speed, high-precision and unmanned detection of key quality parameters, which greatly improves the production quality and efficiency of gear transmission components. Summary of the Invention

[0006] This invention addresses the problem that existing bevel gear assembly and inspection methods are mostly manual, resulting in low efficiency and inability to meet the requirements of large-scale automated production. Therefore, it proposes an automatic bevel gear tooth backlash measurement device. This invention can not only be applied to the automatic measurement of bevel gear tooth backlash, but also automatically measure the axial movement of transmission equipment.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] An automatic bevel gear backlash measuring device includes a test piece mounting platform and two drive components. The test piece mounting platform is horizontally positioned, and its horizontal end face has a three-tiered stepped structure. The test piece is mounted on the middle tier of the horizontal end face of the test piece mounting platform. Both the upper and lower tiers of the horizontal end face of the test piece mounting platform are equipped with drive components, and each drive component has an actuator. The drive components drive the actuators to move along the length, width, and height directions of the device, respectively. The actuator on the upper tier is vertically downward, and the actuator on the lower tier is horizontally inward.

[0009] Furthermore, the drive assembly includes a longitudinal translation screw assembly, a vertical adjustment screw assembly, a lateral adjustment screw assembly, and a moving bracket. The longitudinal translation screw assembly is disposed along the length direction on the horizontal end face of the test piece mounting platform. The moving bracket is disposed on the execution end of the longitudinal translation screw assembly via the lateral adjustment screw assembly. The longitudinal translation screw assembly drives the lateral adjustment screw assembly and the moving bracket to move along the length direction. The lateral adjustment screw assembly drives the moving bracket to move along the width direction. The actuator is disposed on the moving bracket via the vertical adjustment screw assembly. The vertical adjustment screw assembly drives the actuator to move along the height direction.

[0010] Furthermore, the longitudinal translation screw assembly includes a longitudinal translation slider, a longitudinal translation screw, a longitudinal translation motor, and two longitudinal translation guide rails. The longitudinal translation screw is set along the length direction on the horizontal end face of the test piece mounting platform. One end of the longitudinal translation screw is connected to the longitudinal translation motor. A longitudinal translation guide rail is set parallel to each other on both sides of the longitudinal translation screw. The longitudinal translation slider is connected to the longitudinal translation screw nut and to the guide rail slider of the longitudinal translation guide rail. The longitudinal translation motor drives the longitudinal translation slider to move along the length direction of the longitudinal translation screw.

[0011] Furthermore, the lateral adjusting screw assembly includes a lateral adjusting slider, a lateral adjusting screw, a lateral adjusting motor, and two lateral adjusting guide rails. The lateral adjusting screw is arranged on the longitudinal translation slider along the width direction. One end of the lateral adjusting screw is connected to the lateral adjusting motor. A lateral adjusting guide rail is provided parallel to each other on both sides of the lateral adjusting screw. The lateral adjusting slider is connected to the lateral adjusting screw nut and to the guide rail slider of the lateral adjusting guide rail. The lateral adjusting motor drives the lateral adjusting slider to move along the length direction of the lateral adjusting screw.

[0012] Furthermore, the movable support is L-shaped, with the horizontal section of the movable support fixed to the horizontal adjustment slider, and the vertical adjustment screw assembly set in the vertical section of the movable support.

[0013] Furthermore, the vertical adjusting screw assembly includes a vertical adjusting slider, a vertical adjusting screw, a vertical adjusting motor, and two vertical adjusting guide rails. The vertical adjusting screw is mounted on the movable bracket along the height direction. One end of the vertical adjusting screw is connected to the vertical adjusting motor. A vertical adjusting guide rail is provided parallel to each other on both sides of the vertical adjusting screw. The vertical adjusting slider is connected to the screw nut of the vertical adjusting screw and to the guide rail slider of the vertical adjusting guide rail. The vertical adjusting motor drives the vertical adjusting slider to move along the length direction of the vertical adjusting screw.

[0014] Furthermore, the actuator includes a servo motor, a high-precision pneumatic cylinder, a hydraulic chuck, and a connecting frame. The servo motor is fixed to one end of the connecting frame, and the output shaft of the servo motor is connected to the cylinder body of the high-precision pneumatic cylinder. The hydraulic chuck is located at the end of the rod of the high-precision pneumatic cylinder. The servo motor drives the high-precision pneumatic cylinder to rotate, and the high-precision pneumatic cylinder drives the hydraulic chuck to move linearly.

[0015] Furthermore, the connecting frame is equipped with a bearing seat for interface conversion, and the output shaft of the servo motor is connected to the cylinder body of the high-precision pneumatic cylinder after passing through the bearing seat.

[0016] Furthermore, a high-precision displacement sensor is provided at the other end of the connecting frame, and the high-precision displacement sensor is located on one side of the end of the high-precision pneumatic cylinder rod.

[0017] Furthermore, the test piece mounting platform includes a platform body and multiple pneumatic clamping components. The upper surface of the platform body is a horizontal end face with a three-layer stepped structure. The multiple pneumatic clamping components are arranged opposite each other in the middle stepped layer of the upper surface of the platform body. The position of the pneumatic clamping components on the platform body is adjustable.

[0018] The beneficial effects of this invention compared to the prior art are:

[0019] This invention provides an automatic bevel gear backlash measurement device, applied in the high-precision assembly and inspection process of a fully automated production line for bevel gear transmission devices, providing richer and more efficient assembly and inspection methods for bevel gear transmission device assembly. This invention overcomes the shortcomings of existing technologies by modifying the variable hydraulic chuck device, making it suitable for measuring the backlash and axial movement of bevel gears with different transmission interfaces. The hydraulic clamping assembly integrated on the test mounting platform enables precise positioning and fixation of the test piece. The drive assembly performs functions such as test piece installation avoidance, reference shaft locking, and test shaft torsion measurement. The separate arrangement of the drive assembly meets the testing requirements of non-coaxial structures of the reference shaft interface and the test shaft interface. The lead screw assembly in the drive assembly consists of high-precision components such as high-precision lead screws, guide rails, sliders, and servo motors, with a positioning accuracy of 0.01mm; the actuator is also equipped with a high-precision displacement sensor, with a testing accuracy of 0.01mm, enabling high-precision measurement of bevel gear backlash and axial movement; furthermore, this device can be integrated with loading and unloading robotic arms and can be integrated into automated production lines to achieve fully automated control. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the drive assembly on the upper stepped layer of the horizontal end face of the test piece mounting platform in this invention;

[0022] Figure 3 This is a schematic diagram of the structure of the drive assembly on the lower stepped layer of the horizontal end face of the test piece mounting platform in this invention;

[0023] Figure 4 This is a schematic diagram of the actuator in this invention;

[0024] Figure 5 This is a schematic diagram of the test piece mounting platform in this invention. Detailed Implementation

[0025] To make the technical problems solved, the technical solutions, and the beneficial effects of the present invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0026] Specific implementation method one: Combining Figures 1 to 5This embodiment describes an automatic bevel gear backlash measuring device, comprising a test piece mounting platform 3 and two drive components 1. The test piece mounting platform 3 is horizontally positioned, and its horizontal end face has a three-tiered stepped structure. The test piece 4 is mounted on the middle tier of the horizontal end face of the test piece mounting platform 3. Both the upper and lower tiers of the horizontal end face of the test piece mounting platform 3 are equipped with drive components 1. Each drive component 1 is equipped with an actuator 2. The drive components 1 drive the actuator 2 to move along the length, width, and height directions of the device, respectively. The actuator 2 on the upper tier is vertically downward, while the actuator 2 on the lower tier is horizontally inward.

[0027] The test piece mounting platform 3 is used to install and position the test piece 4 and install the drive assembly 1 on it; the two drive assemblies 1 can realize the locking of the reference axis of the test piece 4, the measurement of the test axis, and the rotation of the shaft system. This device has the characteristics of high measurement accuracy, strong operability, and strong practicality.

[0028] Specific Implementation Method Two: Combining Figures 1 to 3 This embodiment describes a drive assembly 1 comprising a longitudinal translation screw assembly 11, a vertical adjustment screw assembly 12, a lateral adjustment screw assembly 13, and a moving bracket 14. The longitudinal translation screw assembly 11 is disposed along the length direction on the horizontal end face of the test piece mounting platform 3. The moving bracket 14 is disposed on the execution end of the longitudinal translation screw assembly 11 via the lateral adjustment screw assembly 13. The longitudinal translation screw assembly 11 drives the lateral adjustment screw assembly 13 and the moving bracket 14 to move along the length direction. The lateral adjustment screw assembly 13 drives the moving bracket 14 to move along the width direction. The actuator 2 is disposed on the moving bracket 14 via the vertical adjustment screw assembly 12. The vertical adjustment screw assembly 12 drives the actuator 2 to move along the height direction.

[0029] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment 1.

[0030] The longitudinal translation screw assembly 11 realizes the long-distance translation function of the mechanism. Its specific functions are as follows: to realize the fixed position avoidance of the test piece 4 and the restoration of the longitudinal origin. The components of the vertical adjustment screw assembly 12 and the lateral adjustment screw assembly 13 are roughly the same as those of the longitudinal translation screw assembly 11 (only the size is different). They are adjusted according to the relevant displacement dimensions of the adjacent working axes to complete the longitudinal and lateral positioning functions of the actuator 2 assembly. All screw assemblies are composed of high-precision components such as high-precision screws, guide rails, sliders and servo motors, with a positioning accuracy of 0.01mm.

[0031] Specific implementation method three: Combining Figures 1 to 3This embodiment describes a longitudinal translation screw assembly 11, which includes a longitudinal translation slider 111, a longitudinal translation screw 112, a longitudinal translation motor 113, and two longitudinal translation guide rails 114. The longitudinal translation screw 112 is disposed along the length direction on the horizontal end face of the test piece mounting platform 3. One end of the longitudinal translation screw 112 is connected to the longitudinal translation motor 113. A longitudinal translation guide rail 114 is provided parallel to each other on both sides of the longitudinal translation screw 112. The longitudinal translation slider 111 is connected to the screw nut of the longitudinal translation screw 112 and to the guide rail slider of the longitudinal translation guide rail 114. The longitudinal translation motor 113 drives the longitudinal translation slider 111 to move along the length direction of the longitudinal translation screw 112.

[0032] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment Two.

[0033] Specific implementation method four: Combination Figures 1 to 3 This embodiment describes a lateral adjusting screw assembly 13, which includes a lateral adjusting slider 131, a lateral adjusting screw 132, a lateral adjusting motor 133, and two lateral adjusting guide rails 134. The lateral adjusting screw 132 is mounted on the longitudinal translation slider 111 along its width direction. One end of the lateral adjusting screw 132 is connected to the lateral adjusting motor 133. Two lateral adjusting guide rails 134 are provided parallel to each other on both sides of the lateral adjusting screw 132. The lateral adjusting slider 131 is connected to the screw nut of the lateral adjusting screw 132 and to the guide rail slider of the lateral adjusting guide rail 134. The lateral adjusting motor 133 drives the lateral adjusting slider 131 to move along the length direction of the lateral adjusting screw 132.

[0034] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment Three.

[0035] Specific Implementation Method Five: Combining Figures 1 to 3 In this embodiment, the movable support 14 is L-shaped. The horizontal section of the movable support 14 is fixed to the horizontal adjustment slider 131, and the vertical adjustment screw assembly 12 is disposed on the vertical section of the movable support 14.

[0036] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment Four.

[0037] Specific Implementation Method Six: Combination Figures 1 to 3This embodiment describes a vertical adjusting screw assembly 12, which includes a vertical adjusting slider 121, a vertical adjusting screw 122, a vertical adjusting motor 123, and two vertical adjusting guide rails 124. The vertical adjusting screw 122 is mounted on the movable bracket 14 along the height direction. One end of the vertical adjusting screw 122 is connected to the vertical adjusting motor 123. A vertical adjusting guide rail 124 is provided parallel to each other on both sides of the vertical adjusting screw 122. The vertical adjusting slider 121 is connected to the screw nut of the vertical adjusting screw 122 and to the guide rail slider of the vertical adjusting guide rail 124. The vertical adjusting motor 123 drives the vertical adjusting slider 121 to move along the length direction of the vertical adjusting screw 122.

[0038] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment Five.

[0039] Specific implementation method seven: Combination Figures 1 to 4 This embodiment describes an actuator 2 comprising a servo motor 21, a high-precision pneumatic cylinder 23, a hydraulic chuck 24, and a connecting frame 25. The servo motor 21 is fixed to one end of the connecting frame 25, and the output shaft of the servo motor 21 is connected to the cylinder body of the high-precision pneumatic cylinder 23. The hydraulic chuck 24 is disposed at the end of the rod of the high-precision pneumatic cylinder 23. The servo motor 21 drives the high-precision pneumatic cylinder 23 to rotate, and the high-precision pneumatic cylinder 23 drives the hydraulic chuck 24 to move linearly.

[0040] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment 1.

[0041] Actuator 2 can perform functions such as vertical positioning, working shaft locking, backlash testing, and test piece rotation. The high-precision pneumatic cylinder 23 has a torsion-resistant double-rod structure and can perform three functions: vertical position compensation, locking and measurement angular compensation, and axial force application. The axial force application function provides the test piece 5 with a suitable preload force (eliminating the influence of bearing clearance) and also provides the actuation force for measuring axial movement. The servo motor 21 can perform actions such as locking and swaying of the test piece 5, and can also realize gear rotation and rotation; the rotation torque is read by the servo motor encoder. The hydraulic chuck 24 is detachably connected to the rod end of the high-precision pneumatic cylinder 23. By changing the variable hydraulic chuck 24, it is suitable for measuring the tooth backlash and axial movement of bevel gears with different transmission interfaces.

[0042] Specific implementation method eight: Combination Figures 1 to 4 In this embodiment, the connecting frame 25 is provided with a bearing seat 22, and the output shaft of the servo motor 21 passes through the bearing seat 22 and is connected to the cylinder body of the high-precision pneumatic cylinder 23.

[0043] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment Seven.

[0044] Specific Implementation Method Nine: Combining Figures 1 to 4 To illustrate this embodiment, the other end of the connecting frame 25 is provided with a high-precision displacement sensor 26, which is located on one side of the rod end of the high-precision pneumatic cylinder 23.

[0045] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment Seven.

[0046] There are two high-precision displacement sensors 26, one for axial and one for radial measurement. One sensor measures tooth backlash, and the other measures axial movement.

[0047] Specific Implementation Method Ten: Combining Figure 1 and Figure 5 This embodiment describes a test piece mounting platform 3 comprising a platform body 5 and multiple pneumatic clamping components 6. The upper surface of the platform body 5 is a horizontal end face with a three-layer stepped structure. The multiple pneumatic clamping components 6 are arranged opposite each other in the middle stepped layer of the upper surface of the platform body 5. The position of the pneumatic clamping components 6 on the platform body 5 is adjustable.

[0048] The undisclosed technical features in this embodiment are the same as those in Specific Embodiment 1.

[0049] The test piece mounting platform 3 serves to install and fix the test piece and install the actuator. A conical positioning block is provided on the platform body 5, and the test piece 4 is clamped and fixed on the conical positioning block to meet the needs of repeated positioning. The pneumatic clamping assembly 6 includes a pneumatic clamping mechanism, a sliding guide rail, and a moving electric module. The pneumatic clamping mechanism is mounted on the moving electric module, which is connected to a guide rail slider on the sliding guide rail to adjust the position of the pneumatic clamping mechanism, thereby achieving positioning and locking of the conical positioning block, and thus completing the positioning and locking of the test piece 4.

[0050] Working principle

[0051] Test piece 4 is installed and fixed by the pneumatic clamping assembly 6 set on the main body 5 of the test piece installation platform 3. During this process, the two drive assemblies 1 avoid the installation position. After the test piece 4 is fixed, the drive assembly 1, which is integrated by the actuator 2, the moving bracket 14, the longitudinal translation screw assembly 11, the vertical adjustment screw assembly 12, and the lateral adjustment screw assembly 13, moves to the coordinate origin. According to the structural characteristics of the test piece 4 and the relative positions of the locking shaft and the test shaft, the actuator 2 in the drive assembly 1 moves to the positions of the locking shaft and the test shaft (different locking shaft actuators and test shaft actuators are used according to different structural forms). The high-precision pneumatic cylinder 23 in the actuator assemblies 2 performs axial adjustment and applies preload. The hydraulic chuck 24 connects the locking shaft and the test shaft. After the connection is completed, the servo motor 21 fixes the locking shaft and rotates the test shaft. The high-precision displacement sensor 26, through the connecting frame 25, performs radial displacement of the test shaft.

[0052] The aforementioned automatic bevel gear tooth backlash measuring device can achieve the following functions:

[0053] Bevel gear backlash measurement function: The test piece 4 is installed and fixed by the pneumatic clamping assembly 6 set on the platform body 5 of the test piece mounting platform 3. During this process, the two drive assemblies 1 avoid the mounting position. After the test piece 4 is fixed, the drive assembly 1, which is integrated by the actuator 2, the moving bracket 14, the longitudinal translation screw assembly 11, the vertical adjustment screw assembly 12, and the lateral adjustment screw assembly 13, moves to the coordinate origin. According to the structural characteristics of the test piece 4 and the relative positions of the locking shaft and the test shaft, the actuator 2 in the drive assembly 1 moves to the positions of the locking shaft and the test shaft (different locking shaft actuators and test shaft actuators are used according to different structural forms). The high-precision pneumatic cylinder 23 in the actuator 2 performs axial adjustment and applies preload. The hydraulic chuck 24 connects the locking shaft and the test shaft. After the connection is completed, the servo motor 21 fixes the locking shaft and rotates the test shaft. The test shaft servo motor 21 rotates axially, and the high-precision displacement sensor 26, through the connecting frame 25, performs radial displacement of the test shaft. The bevel gear tooth clearance is determined based on the difference between the upper and lower readings of the radial high-precision displacement sensor 26.

[0054] Axial movement measurement function: The test piece 4 is installed and fixed by the pneumatic clamping assembly 6 set on the platform body 5 of the test piece mounting platform 3. During this process, the two drive assemblies 1 avoid the installation position. After the test piece 4 is fixed, the drive assembly 1, which is integrated by the actuator 2, the moving bracket 14, the longitudinal translation screw assembly 11, the vertical adjustment screw assembly 12, and the lateral adjustment screw assembly 13, moves to the coordinate origin. According to the structural characteristics of the test piece 4 and the relative position of the locking shaft and the test shaft, the actuator 2 in the drive assembly 1 moves to the position of the locking shaft and the test shaft (different locking shaft actuators and test shaft actuators are used according to different structural forms). The high-precision pneumatic cylinder 23 in the actuator 2 performs axial adjustment and applies preload. The hydraulic chuck 24 connects the locking shaft and the test shaft. After the connection is completed, the servo motor 21 fixes the locking shaft and rotates the test shaft. The high-precision displacement sensor 26, through the connecting frame 25, measures the radial displacement of the test shaft. The high-precision pneumatic cylinder 23 of the test shaft moves up and down, and the axial movement of the shaft system is determined by the high-precision axial displacement sensor 26.

[0055] Test piece rotation function: The test piece 4 is installed and fixed by the pneumatic clamping assembly 6 set on the main body 5 of the test piece installation platform 3. During this process, the two drive components 1 avoid the installation position. After the test piece 4 is fixed, the drive component 1, which is integrated by the actuator 2, the moving bracket 14, the longitudinal translation screw assembly 11, the vertical adjustment screw assembly 12, and the lateral adjustment screw assembly 13, moves to the coordinate origin. According to the structural characteristics of the test piece 4 and the relative positions of the locking shaft and the test shaft, the actuator 2 in the drive component 1 moves to the positions of the locking shaft and the test shaft (different locking shaft actuators and test shaft actuators are used according to different structural forms). The high-precision pneumatic cylinder 23 in the actuator 2 performs axial adjustment and applies preload, and the hydraulic chuck 24 connects the rotation shaft. After connection, the servo motor 21 rotates the rotation shaft. The angle encoder in the servo motor 21 determines the rotation angle.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An automatic measuring device for bevel gear tooth backlash, characterized in that: It includes a test piece mounting platform (3) and two drive components (1). The test piece mounting platform (3) is set horizontally. The horizontal end face of the test piece mounting platform (3) has a three-layer stepped structure. The test piece (4) is clamped in the middle stepped layer of the horizontal end face of the test piece mounting platform (3). The upper and lower stepped layers of the horizontal end face of the test piece mounting platform (3) are equipped with drive components (1). The drive components (1) are equipped with actuators (2). The drive components (1) drive the actuators (2) to move along the length, width and height directions of the device respectively. The actuators (2) on the upper stepped layer are set vertically downward, and the actuators (2) on the lower stepped layer are set horizontally inward.

2. The automatic bevel gear backlash measuring device according to claim 1, characterized in that: The drive assembly (1) includes a longitudinal translation screw assembly (11), a vertical adjustment screw assembly (12), a lateral adjustment screw assembly (13), and a moving bracket (14). The longitudinal translation screw assembly (11) is set on the horizontal end face of the test piece mounting platform (3) along the length direction. The moving bracket (14) is set on the execution end of the longitudinal translation screw assembly (11) through the lateral adjustment screw assembly (13). The longitudinal translation screw assembly (11) drives the lateral adjustment screw assembly (13) and the moving bracket (14) to move along the length direction. The lateral adjustment screw assembly (13) drives the moving bracket (14) to move along the width direction. The actuator (2) is set on the moving bracket (14) through the vertical adjustment screw assembly (12). The vertical adjustment screw assembly (12) drives the actuator (2) to move along the height direction.

3. The automatic bevel gear tooth backlash measuring device according to claim 2, characterized in that: The longitudinal translation screw assembly (11) includes a longitudinal translation slider (111), a longitudinal translation screw (112), a longitudinal translation motor (113), and two longitudinal translation guide rails (114). The longitudinal translation screw (112) is set on the horizontal end face of the test piece mounting platform (3) along the length direction. One end of the longitudinal translation screw (112) is connected to the longitudinal translation motor (113). A longitudinal translation guide rail (114) is provided parallel to each other on both sides of the longitudinal translation screw (112). The longitudinal translation slider (111) is connected to the screw nut of the longitudinal translation screw (112) and is also connected to the guide rail slider of the longitudinal translation guide rail (114). The longitudinal translation motor (113) drives the longitudinal translation slider (111) to move along the length direction of the longitudinal translation screw (112).

4. The automatic bevel gear backlash measuring device according to claim 3, characterized in that: The lateral adjustment screw assembly (13) includes a lateral adjustment slider (131), a lateral adjustment screw (132), a lateral adjustment motor (133), and two lateral adjustment guide rails (134). The lateral adjustment screw (132) is set on the longitudinal translation slider (111) along the width direction. One end of the lateral adjustment screw (132) is connected to the lateral adjustment motor (133). A lateral adjustment guide rail (134) is provided parallel to each other on both sides of the lateral adjustment screw (132). The lateral adjustment slider (131) is connected to the screw nut of the lateral adjustment screw (132) and to the guide rail slider of the lateral adjustment guide rail (134). The lateral adjustment motor (133) drives the lateral adjustment slider (131) to move along the length direction of the lateral adjustment screw (132).

5. The automatic bevel gear backlash measuring device according to claim 4, characterized in that: The movable bracket (14) is L-shaped. The horizontal section of the movable bracket (14) is fixed to the horizontal adjustment slider (131), and the vertical adjustment screw assembly (12) is set in the vertical section of the movable bracket (14).

6. The automatic bevel gear tooth backlash measuring device according to claim 5, characterized in that: The vertical adjustment screw assembly (12) includes a vertical adjustment slider (121), a vertical adjustment screw (122), a vertical adjustment motor (123), and two vertical adjustment guide rails (124). The vertical adjustment screw (122) is mounted on the movable bracket (14) along the height direction. One end of the vertical adjustment screw (122) is connected to the vertical adjustment motor (123). A vertical adjustment guide rail (124) is provided parallel to each other on both sides of the vertical adjustment screw (122). The vertical adjustment slider (121) is connected to the screw nut of the vertical adjustment screw (122) and to the guide rail slider of the vertical adjustment guide rail (124). The vertical adjustment motor (123) drives the vertical adjustment slider (131) to move along the length direction of the vertical adjustment screw (122).

7. The automatic bevel gear tooth backlash measuring device according to claim 1, characterized in that: The actuator (2) includes a servo motor (21), a high-precision pneumatic cylinder (23), a hydraulic chuck (24), and a connecting frame (25). The servo motor (21) is fixed to one end of the connecting frame (25). The output shaft of the servo motor (21) is connected to the cylinder body of the high-precision pneumatic cylinder (23). The hydraulic chuck (24) is located at the end of the rod of the high-precision pneumatic cylinder (23). The servo motor (21) drives the high-precision pneumatic cylinder (23) to rotate, and the high-precision pneumatic cylinder (23) drives the hydraulic chuck (24) to move linearly.

8. The automatic bevel gear backlash measuring device according to claim 7, characterized in that: The connecting frame (25) is provided with a bearing seat (22), and the output shaft of the servo motor (21) passes through the bearing seat (22) and is connected to the cylinder body of the high-precision pneumatic cylinder (23).

9. The automatic measuring device for bevel gear tooth backlash according to claim 7, characterized in that: The other end of the connecting frame (25) is equipped with a high-precision displacement sensor (26), which is located on one side of the rod end of the high-precision pneumatic cylinder (23).

10. The automatic measuring device for bevel gear tooth flank clearance according to claim 1, characterized in that: The test piece mounting platform (3) includes a platform body (5) and multiple pneumatic clamping components (6). The upper surface of the platform body (5) is a horizontal end face with a three-layer stepped structure. The multiple pneumatic clamping components (6) are arranged opposite each other in the middle stepped layer of the upper surface of the platform body (5). The position of the pneumatic clamping components (6) on the platform body (5) is adjustable.

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