Tooth surface roughness measuring device for gear production and measuring method thereof

Abstract

The invention relates to a tooth surface roughness measuring device for gear production and a measuring method thereof.The tooth surface roughness measuring device comprises a device bottom plate, fixed plate bodies are fixed to the front end and the rear end of the top of the device bottom plate, first telescopic cylinder bodies are installed on the outer side faces of the fixed plate bodies, and piston rods of the first telescopic cylinder bodies penetrate through the fixed plate bodies; a gear body is clamped through the clamping disc body, a square groove is formed in the top of the device bottom plate, first moving blocks are arranged at the two ends of the interior of the square groove, first threaded rods penetrate through the interiors of the first moving blocks, opposite threads are arranged on the exteriors of the first threaded rods, and the opposite threads are connected with screw holes in the first moving blocks. A multi-contact-pin cooperative parallel detection mode is adopted, the first contact pins are used for collecting roughness data of the outer working tooth surface of the gear, meanwhile, the second contact pins synchronously make contact with the tooth top surface and the tooth bottom surface in a tooth groove, the detection precision is improved, the detection precision is improved, and the detection precision is improved. And the efficiency limitation of traditional single-contact-pin step-by-step detection is broken through.

Description

TECHNICAL FIELD

[0001] The application relates to the field of gear production, and particularly relates to a gear surface roughness measuring device for gear production and a measuring method thereof. BACKGROUND

[0002] As a basic element for power transmission and movement, gears have the characteristics of large power range, high transmission efficiency, long service life, safety and reliability, and have become indispensable transmission components of many mechanical products. After gear machining, the surface roughness thereof needs to be detected. As a key component in a mechanical transmission system, the surface roughness of the gear directly affects the transmission efficiency and service life of the gear.

[0003] According to the disclosed patent CN120160584A, a gear surface roughness measuring device for gear production relates to the technical field of gear detection, and comprises a workbench, a positioning rod is arranged on the workbench, the positioning rod comprises a rotating rod and a group of connecting rods, the rotating rod is rotationally arranged between the two connecting rods, a positioning block is slidably arranged on the rotating rod, a sliding groove is further arranged on the rotating rod, a sliding block is slidably arranged in the sliding groove, a recess is arranged on the surface of the sliding block, and a clamping block is rotationally arranged on the inner wall of the recess. A horizontal screw sliding rail is arranged on the workbench, a detection table is slidably arranged on the horizontal screw sliding rail, a lifting table is arranged on the detection table in a lifting manner, a detector is connected with a detection probe, and the detection probe is located below the lifting table. The application has the advantages of realizing batch detection of multiple gears, facilitating detection of different gear surface positions on the gear surface, improving the automation degree of detection, and enhancing the detection efficiency.

[0004] However, in the traditional gear production process, the detection of gear surface roughness generally uses a detection probe to emit detection signals by sliding along the tooth profile surface to collect data and evaluate the roughness parameters of the outer surface. However, for the internal gear surface, due to the narrow gear space and the existence of an inclination angle, a non-contact detection probe (such as a laser or an optical sensor) cannot effectively cover the entire area of the internal gear surface due to geometric interference or signal reflection deviation, ultimately making the roughness detection of the internal gear surface a blind area of the traditional device. Therefore, a new technical solution is needed to solve the problem. SUMMARY

[0005] The tooth surface roughness measuring device for gear production and the measuring method thereof provided by the present application solve the technical problem that the roughness detection of the inner tooth surface is the blind area of the traditional device in the conventional gear production process.

[0006] In order to achieve the object of the present application, the technical scheme adopted by the present application is as follows: a tooth surface roughness measuring device for gear production is designed, which comprises a device bottom plate, fixed plates are arranged at the top of the device bottom plate and located at the front and rear ends, first telescopic cylinder bodies are arranged on the outer side surfaces of the fixed plates, the piston rods of the first telescopic cylinder bodies pass through the fixed plates, the gear body is clamped by a clamping disc, a square groove is arranged at the top of the device bottom plate, first moving blocks are arranged at the two ends in the square groove, first threaded rods pass through the first moving blocks, opposite threads are arranged on the outer surfaces of the first threaded rods, the opposite threads are connected with the screw holes in the first moving blocks, second telescopic cylinder bodies are arranged on the top of the first moving blocks, and measuring assemblies are connected with the piston rods on the top of the second telescopic cylinder bodies.

[0007] Preferably, the measuring assembly comprises a concave plate body, a first driving motor is arranged at one end of the concave plate body, and a second threaded rod is connected with the output shaft of the first driving motor and passes through the concave plate body.

[0008] Preferably, a plurality of second moving blocks pass through the second threaded rod, the screw holes in the second moving blocks are connected with the second threaded rod, a connecting plate is fixed on the top of the second moving blocks, a first stylus is fixed at the end of the connecting plate, and the first stylus is used for contacting the working tooth surface of the gear and detecting the roughness of the working tooth surface of the gear.

[0009] Preferably, support plates are arranged on the two sides of the upper and lower ends of the connecting plate, a second driving motor is arranged on the outer side surface of one of the support plates, and a rotating rod is connected with the output shaft of the second driving motor and passes through the support plate.

[0010] Preferably, a moving plate passes through the rotating rod, the moving plate is fixed at the penetration position of the rotating rod, a second stylus is fixed on the inner side surface of the moving plate, and the second stylus is used for contacting the tooth top surface and the tooth bottom surface of the gear and detecting the roughness of the tooth top surface and the tooth bottom surface of the gear.

[0011] Preferably, a plurality of third driving motors are arranged at one end of the moving plate, a plurality of grooves are arranged at the other end of the moving plate, the plurality of grooves are arranged correspondingly with the plurality of third driving motors, and a screen is arranged at the opening of the plurality of grooves.

[0012] Preferably, the output shaft of the third drive motor extends into the groove and is fixed to the connecting rod body in the groove, a plurality of blowing fan blades are mounted outside the connecting rod body, the piston rod end of the first telescopic cylinder body is provided with a mounting groove, a fourth drive motor is mounted in the mounting groove, and the output shaft of the fourth drive motor is connected with a clamping disc body.

[0013] Preferably, a surface roughness measuring instrument is mounted on the side of the device bottom plate and connected with the first stylus and the second stylus.

[0014] Preferably, one end of the first threaded rod extends through the square slot to the device bottom plate and is connected with a fifth drive motor mounted on the side of the device bottom plate.

[0015] Also provided is a tooth surface roughness measuring method for gear production, comprising the following steps: S1, first place the gear body to be detected horizontally between the two clamping disc bodies arranged symmetrically left and right, ensure that the gear axis is coincident with the disc center line, then start the first telescopic cylinder body, the piston in the cylinder body moves linearly along the axial direction under the action of the pressure medium, the thrust is transmitted to the clamping disc body through the piston rod, and the left and right clamping disc bodies clamp the gear body under the pushing of the piston rod; S2, before starting detection, the moving plate body is provided with a plurality of third drive motors, the output shaft of the third drive motor rotates and drives the connecting rod body connected thereto to rotate synchronously, the connecting rod body transmits the rotary power to the blowing fan blades under the drive of the motor, the blowing fan blades rotate to form directional airflow, which can effectively act on the inside of the gear slot, metal chips, oil stains, dust and other foreign matters are often attached to the inside of the gear slot during the processing, transportation and storage of the gear, if these foreign matters remain on the surface of the gear slot, they will interfere with the true contact state between the stylus and the tooth surface when the stylus contacts the tooth surface during the subsequent roughness detection process, the directional airflow can blow into every corner of the gear slot, blow the metal chips away from the tooth surface, and make them fall or be blown out of the gear slot, avoiding direct contact between the stylus and the contaminants during detection, since the airflow is located at both ends of the stylus, the directional airflow will blow over the tooth surface before the stylus during the process of moving the plate body to move the stylus transversely, when the stylus subsequently contacts the tooth surface, it contacts the clean tooth surface that has been cleaned, ensuring the stability of the contact force between the stylus and the tooth surface. S3. After the gear is positioned and clamped to ensure its position is fixed during the detection process, the fifth drive motor is started to drive the first threaded rod to rotate. The first threaded rod adopts a double reverse thread. The moving blocks on both sides of the threaded rod will move symmetrically in opposite directions along the axial direction. The moving blocks synchronously drive the second telescopic cylinder and the concave plate to translate. The movement of the concave plate further drives the connecting plate, and the first contact pin connected to the connecting plate also moves accordingly, gradually approaching the outer working tooth surface of the gear until the first contact pin forms a stable contact with the tooth profile surface. At this time, the first contact pin group begins to collect the roughness data of the outer working tooth surface of the gear in real time. At the same time, the second drive motor drives the rotating rod to rotate. The rotating rod drives the moving plate to deflect around its axis, adjusting the rotation angle of the moving plate so that its angle is consistent with the current tooth groove inclination. When the moving plate is adjusted to a suitable angle and penetrates into the tooth groove, the second contact pin set on the surface of the moving plate at the upper and lower positions will synchronously contact the top and bottom surfaces in the tooth groove, forming a three-point synchronous detection of the outer tooth surface, tooth top surface, and tooth bottom surface, which can simultaneously detect the surface roughness of different parts of the gear. S4. During the testing process, when the first stylus traverses the minute undulations on the gear surface, its tip will experience a slight displacement in the direction perpendicular to the tooth surface. As the moving plate penetrates deeper into the tooth groove and its angle is adjusted to match the groove's inclination, the second stylus group simultaneously contacts the top and bottom surfaces within the groove. Similarly, the microscopic unevenness of the top and bottom surfaces of the groove will cause the second stylus to move vertically accordingly. These displacement changes reflect the microscopic characteristics of the gear surface roughness. The surface roughness measuring instrument is equipped with an inductive sensor. When the first and second styluses undergo displacement changes, the sensor converts these minute mechanical displacements into proportional electrical signals. For example, in the inductive sensor... In this process, the displacement of the stylus changes the inductance of the coil, which in turn causes a change in the induced electromotive force. This change is converted into an electrical signal output. The generated electrical signal is transmitted from the first stylus and the second stylus to the surface roughness measuring instrument through the signal transmission line. After receiving the electrical signal, the surface roughness measuring instrument amplifies it. Through its built-in amplification circuit, the amplitude of the signal is amplified to a range suitable for subsequent analysis and processing, so that the surface roughness information contained therein can be clearly extracted. The surface roughness measuring instrument transmits the digitized signal to its internal processor for calculation. The calculated surface roughness parameter value is displayed on the surface roughness measuring instrument's screen. S5. When it is necessary to inspect different positions of the gear, during the process of using the first telescopic cylinder to drive the piston rod to drive the clamping disc to clamp the gear, the fourth drive motor can be started. The fourth drive motor drives the clamping disc to rotate, thereby driving the gear to rotate during the clamping process, and performing roughness inspection on different positions of the gear.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention combines a first threaded rod, a second telescopic cylinder, and a measuring component. A first stylus on the side of the connecting plate maintains contact with the outer working tooth surface of the gear. The first stylus collects the roughness data of the outer tooth surface in real time. Simultaneously, by controlling the vertically adjustable moving plate, a second stylus mounted on its surface synchronously contacts the tooth tip and tooth bottom surfaces within the gear groove. This achieves parallel detection of three tooth surfaces (outer working tooth surface, tooth tip surface, and tooth bottom surface). The collaborative work of multiple styluses ensures the detection of different tooth surface roughnesses within the gear groove, avoiding the efficiency bottleneck of traditional single-stylus step-by-step detection. This improves the completeness and accuracy of gear tooth surface quality inspection, solving the technical problem that in traditional gear production, the inspection of tooth surface roughness generally uses a detection probe. The probe slides along the tooth profile surface to emit detection signals to collect data and then evaluate the roughness parameters of the outer surface. However, for the inner tooth surface, due to the narrow tooth groove space and the existence of an inclination angle, non-contact detection probes (such as lasers and optical sensors) are prone to geometric interference or signal reflection deviations and cannot effectively cover the entire area of ​​the inner tooth surface. Ultimately, the roughness inspection of the inner tooth surface becomes a blind spot of traditional devices.

[0017] 2. This invention combines a moving block, a concave plate, and a rotating rod. The synchronous rotation of the first threaded rod drives multiple moving blocks to move linearly along the axial direction, allowing the stylus groups mounted on each moving block to simultaneously contact both sides of the gear's tooth surface. This enables parallel detection of the roughness of both tooth surfaces, improving single-tooth detection efficiency. Furthermore, the second threaded rod within the concave plate drives the stylus to move laterally, covering tooth surfaces at different axial positions and completing roughness detection across the entire tooth width. Moreover, the second drive motor rotates the rotating rod, causing the moving plate to deflect around its axis, allowing it to match tooth grooves with different inclination angles. This ensures the stylus can penetrate deep into the tooth groove and simultaneously contact both the top and bottom surfaces, achieving the acquisition of roughness parameters for the entire surface of complex tooth profiles.

[0018] 3. This invention combines a moving plate, a third drive motor, and a blower blade. When the moving plate extends into the gear tooth groove, multiple third drive motors on it start, driving the blower blade to rotate at high speed, forming a directional airflow. The airflow can blow away metal shavings, oil particles, dust, and other foreign matter attached to the tooth groove, avoiding contact force fluctuations or signal distortion caused by direct contact between the stylus and contaminants during the detection process. At the same time, since the airflow is located at both ends of the stylus, during the lateral movement, after the airflow blows over the tooth surface, the stylus contacts the cleaned tooth surface, ensuring that the area before the stylus contacts the tooth surface is cleaned, thereby ensuring the accuracy of the roughness measurement data. The detection mechanism and cleaning mechanism are integrated into one unit, eliminating the need for multiple devices. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the measurement component structure of the present invention; Figure 3 This is a schematic diagram of the groove structure of the present invention; Figure 4 This is a schematic diagram of the fourth drive motor of the present invention; Figure 5 This is a top view of the structure of the present invention; In the diagram: 1. Device base plate; 101. Surface roughness measuring instrument; 2. Square groove; 201. First moving block; 202. Second telescopic cylinder; 203. Concave plate; 204. First drive motor; 205. Second threaded rod; 206. Fixed plate; 207. First telescopic cylinder; 208. Clamping disc; 209. Gear body; 210. Fifth drive motor; 211. First threaded rod; 212. Second moving block; 213. Connecting plate; 214. Supporting plate; 215. Second drive motor; 216. Rotating rod; 217. Moving plate; 218. First stylus; 219. Second stylus; 220. Mounting groove; 221. Fourth drive motor; 3. Third drive motor; 301. Groove; 302. Partition net; 303. Connecting rod; 304. Fan blade. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: A tooth surface roughness measuring device and method for gear production, see [link to example]. Figures 1 to 5 The device includes a base plate 1, with fixed plates 206 fixed at both the front and rear ends of the top of the base plate 1. A first telescopic cylinder 207 is installed on the outer side of the fixed plate 206. The piston rod of the first telescopic cylinder 207 passes through the fixed plate 206 and clamps the gear body 209 through the clamping disc 208. A square groove 2 is provided at the top of the base plate 1. A first moving block 201 is provided at both ends inside the square groove 2. A first threaded rod 211 passes through the first moving block 201. One end of the first threaded rod 211 passes through the square groove 2 and extends into the base plate 1, connecting with a fifth drive motor 210 installed on the side of the base plate 1. The first threaded rod 211 has opposite threads on the outside, which connect with the threaded holes in the first moving block 201. A second telescopic cylinder 202 is installed on the top of the first moving block 201.

[0021] First, the gear body 209 to be tested is placed horizontally between two symmetrically arranged clamping discs 208, ensuring that the gear axis coincides with the center line of the disc. Then, the first telescopic cylinder 207 is activated. The piston in the cylinder moves linearly along the axis under the action of the pressure medium, and the thrust is transmitted to the clamping discs 208 through the piston rod. Under the push of the piston rod, the left and right clamping discs 208 clamp the gear body 209.

[0022] For details, see Figure 2 The piston rod at the top of the second telescopic cylinder 202 is connected to a measuring assembly, which includes a concave plate 203. A first drive motor 204 is mounted at one end of the concave plate 203. The output shaft of the first drive motor 204 passes through the concave plate 203 and is connected to a second threaded rod 205. Multiple second moving blocks 212 penetrate the outside of the second threaded rod 205. The threaded holes in the second moving blocks 212 are connected to the second threaded rod 205. A connecting plate 213 is fixed to the top of the second moving blocks 212. A first contact pin 218 is fixed to the end of the connecting plate 213 for contacting the working tooth surface of the gear. For the roughness detection of the working tooth surface of the gear, support plates 214 are installed on both sides of the upper and lower ends of the connecting plate 213. A second drive motor 215 is installed on the outer side of one of the support plates 214. The output shaft of the second drive motor 215 passes through the support plate 214 and is connected to a rotating rod 216. A movable plate 217 passes through the outside of the rotating rod 216, and the position of the movable plate 217 and the rotating rod 216 is fixed. A second stylus 219 is fixed on the inner side of the movable plate 217 for contacting the tooth tip and tooth bottom surfaces of the gear to detect the roughness of the tooth tip and tooth bottom surfaces of the gear.

[0023] After the gear completes its positioning and clamping, ensuring its position is fixed during the testing process, the fifth drive motor 210 is activated to drive the first threaded rod 211 to rotate. The first threaded rod 211 adopts a double reverse thread, and the moving blocks on both sides of the threaded rod will move symmetrically in opposite directions along the axial direction. The moving blocks synchronously drive the second telescopic cylinder 202 and the concave plate 203 to translate. The movement of the concave plate 203 further drives the connecting plate 213, and the first contact pin 218 connected to the connecting plate 213 also moves accordingly, gradually approaching the outer working tooth surface of the gear, until the first contact pin 218 forms a stable contact with the tooth profile surface. At this time, the first contact pin 21... Group 8 begins to collect roughness data of the outer working tooth surface of the gear in real time. At the same time, the second drive motor 215 drives the rotating rod 216 to rotate. The rotating rod 216 drives the moving plate 217 to deflect around its axis, adjusting the rotation angle of the moving plate 217 to match the current tooth groove inclination. When the moving plate 217 is adjusted to a suitable angle and penetrates into the tooth groove, the second stylus 219 set on the surface of the moving plate 217 at the upper and lower positions will simultaneously contact the top and bottom surfaces inside the tooth groove, forming a three-point synchronous detection of the outer tooth surface, tooth top surface, and tooth bottom surface, which can simultaneously detect the surface roughness of different parts of the gear.

[0024] Further, see Figure 3The movable plate 217 has multiple third drive motors 3 installed at one end and multiple grooves 301 at the other end. The multiple grooves 301 are corresponding to the multiple third drive motors 3, and a partition net 302 is installed at the opening of each groove. The output shaft of the third drive motor 3 extends into the groove 301 and is fixed to the connecting rod 303 in the groove 301. Multiple fan blades 304 are installed on the outside of the connecting rod 303.

[0025] Multiple third drive motors 3 are installed on the surface of the movable plate 217. The rotation of the output shaft of each third drive motor 3 drives the connected connecting rod 303 to rotate synchronously. Driven by the motors, the connecting rod 303 transmits rotational power to the fan blades 304. When the fan blades 304 rotate, they create a directional airflow that effectively acts on the inside of the gear grooves. During gear processing, transportation, and storage, the inside of the gear grooves often accumulates metal shavings, oil particles, and dust. If these foreign objects remain on the surface of the gear grooves, they will interfere with the actual contact state between the stylus and the gear surface during subsequent roughness testing, thus affecting the directional airflow. The airflow can reach every corner of the tooth groove, blowing metal chips away from the tooth surface, causing them to fall or be carried out of the tooth groove by the airflow. This avoids direct contact between the stylus and contaminants during the detection process. Since the airflow is located at both ends of the stylus, during the lateral movement of the stylus driven by the moving plate 217, the directional airflow will blow across the tooth surface before the stylus. When the stylus subsequently contacts the tooth surface, it contacts a clean tooth surface that has already been cleaned, ensuring that the contact force between the stylus and the tooth surface is stable and will not fluctuate due to the presence of contaminants. It also avoids signal distortion caused by contaminants, thus providing reliable contact conditions for roughness measurement and ensuring the accuracy of the measurement data.

[0026] It is worth emphasizing that, see Figure 4 The piston rod end of the first telescopic cylinder 207 is provided with an installation groove 220, and a fourth drive motor 221 is installed inside the installation groove 220. The output shaft of the fourth drive motor 221 is connected to the clamping disc 208.

[0027] During gear inspection, while the first telescopic cylinder 207 drives the piston rod to drive the clamping disc 208 to clamp the gear, the fourth drive motor 221 can be activated. The fourth drive motor 221 drives the clamping disc 208 to rotate, thereby driving the gear to rotate during the clamping process, and roughness detection is performed on different positions of the gear.

[0028] It is worth noting that, see Figure 1 A surface roughness measuring instrument 101 is mounted on the side of the device base plate 1. The surface roughness measuring instrument 101 is connected to the first contact pin 218 and the second contact pin 219.

[0029] When the first stylus 218 traverses the minute undulations on the gear surface, its tip will experience a minute displacement in a direction perpendicular to the tooth surface. When the moving plate 217 penetrates deeper into the tooth groove and its angle is adjusted to match the groove's inclination, the second stylus 219 simultaneously contacts the top and bottom surfaces within the tooth groove. Similarly, the microscopic unevenness of the top and bottom surfaces of the tooth groove will cause the second stylus 219 to experience corresponding vertical displacement. These displacement changes reflect the microscopic characteristics of the gear surface roughness. The surface roughness measuring instrument 101 is equipped with an inductive sensor. When the first stylus 218 and the second stylus 219 undergo displacement changes, the sensor converts these minute mechanical displacements into proportional electrical signals. For example, in an inductive sensor, the stylus... The displacement of the coil changes its inductance, which in turn causes a change in the induced electromotive force. This change is converted into an electrical signal output. The generated electrical signal is transmitted from the first contact pin 218 and the second contact pin 219 to the surface roughness measuring instrument 101 through the signal transmission line. After receiving the electrical signal, the surface roughness measuring instrument 101 amplifies it. Through the built-in amplification circuit, the amplitude of the signal is amplified to a range suitable for subsequent analysis and processing so that the surface roughness information contained therein can be clearly extracted. The surface roughness measuring instrument 101 transmits the digitized signal to the internal processor for calculation. The calculated surface roughness parameter value is displayed on the display screen of the surface roughness measuring instrument 101.

[0030] It should be noted that the multiple first telescopic cylinders 207, second telescopic cylinders 202 and fifth drive motors 210 are all connected to an external synchronous controller. The synchronous controller is used to synchronously control the multiple first telescopic cylinders 207, second telescopic cylinders 202 and fifth drive motors 210. The synchronous controller model is IPC-240 (SAD240).

[0031] In addition, all components designed in this invention are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. They can be fully implemented by those skilled in the art, so there is no need to elaborate. The content protected by this invention does not involve improvements to the internal structure and methods.

Claims

1. A tooth surface roughness measuring device for gear production, comprising a device base plate (1), characterized in that, The device base plate (1) has fixed plates (206) at both the front and rear ends of the top. A first telescopic cylinder (207) is installed on the outer side of the fixed plate (206). The piston rod of the first telescopic cylinder (207) passes through the fixed plate (206) and clamps the gear body (209) through the clamping disc (208). The device base plate (1) has a square groove (2) at the top. A first moving block (201) is provided at both ends of the square groove (2). A first threaded rod (211) passes through the first moving block (201). The first threaded rod (211) has opposite threads on the outside. The opposite threads are connected to the threaded holes in the first moving block (201). A second telescopic cylinder (202) is installed on the top of the first moving block (201). A measuring component is connected to the piston rod on the top of the second telescopic cylinder (202).

2. The tooth surface roughness measuring device for gear production according to claim 1, wherein The measuring component includes a concave plate (203), a first drive motor (204) is mounted on one end of the concave plate (203), and the output shaft of the first drive motor (204) passes through the concave plate (203) and is connected to a second threaded rod (205).

3. The tooth surface roughness measuring device for gear production according to claim 2, wherein The second threaded rod (205) has multiple second moving blocks (212) passing through its exterior. The threaded holes in the second moving blocks (212) are connected to the second threaded rod (205). A connecting plate (213) is fixed to the top of the second moving block (212). A first contact pin (218) is fixed to the end of the connecting plate (213) for contacting the working tooth surface of the gear and detecting the roughness of the working tooth surface of the gear.

4. The tooth surface roughness measuring device for gear production according to claim 3, wherein Support plates (214) are installed on both sides of the upper and lower ends of the connecting plate (213). A second drive motor (215) is installed on the outer side of one of the support plates (214). The output shaft of the second drive motor (215) passes through the support plate (214) and is connected to a rotating rod (216).

5. The tooth surface roughness measuring device for gear production according to claim 4, wherein The rotating rod (216) has a movable plate (217) passing through its exterior, and the position of the movable plate (217) passing through the rotating rod (216) is fixed. A second stylus (219) is fixed on the inner side of the movable plate (217) for contacting the tooth tip and tooth bottom of the gear to detect the roughness of the tooth tip and tooth bottom of the gear.

6. The tooth surface roughness measuring device for gear production according to claim 5, wherein The movable plate (217) is equipped with multiple third drive motors (3) at one end and multiple grooves (301) at the other end. The multiple grooves (301) are correspondingly arranged with the multiple third drive motors (3), and a mesh (302) is installed at the opening of the groove. The output shaft of the third drive motor (3) extends into the groove (301) and is fixed with the connecting rod (303) in the groove (301). Multiple fan blades (304) are installed on the outside of the connecting rod (303).

7. The tooth surface roughness measuring device for gear production according to claim 1, wherein The piston rod end of the first telescopic cylinder (207) is provided with an installation groove (220), and a fourth drive motor (221) is installed inside the installation groove (220). The output shaft of the fourth drive motor (221) is connected to the clamping disc (208).

8. The tooth surface roughness measuring device for gear production according to claim 1, wherein The device base plate (1) side is provided with a surface roughness measuring instrument (101), and the surface roughness measuring instrument (101) is connected with the first stylus (218) and the second stylus (219).

9. The tooth surface roughness measuring device for gear production according to claim 1, wherein The first threaded rod (211) is connected with the fifth driving motor (210) installed on the side of the device base plate (1).

10. A tooth surface roughness measuring method for gear production, using the tooth surface roughness measuring device according to any one of claims 1 to 9, characterized by, The method comprises the following steps: S1, first, the gear body (209) to be detected is horizontally placed between the two clamping disc bodies (208) symmetrically arranged, and it is ensured that the gear axis is coincident with the disc center line, then the first telescopic cylinder body (207) is started, the piston in the cylinder body moves linearly along the axial direction under the action of the pressure medium, the thrust is transmitted to the clamping disc body (208) through the piston rod, and the left and right clamping disc bodies (208) clamp the gear body (209) under the pushing of the piston rod; S2, before starting detection, since the moving plate body (217) is provided with a plurality of third driving motors (3), the output shaft of the third driving motor (3) rotates, which drives the connecting rod body (303) connected therewith to rotate synchronously, the connecting rod body (303) transmits the rotary power to the blowing fan blade (304) under the driving of the motor, when the blowing fan blade (304) rotates, directional airflow is formed, which can effectively act on the inside of the gear slot, the directional airflow can blow to each corner in the gear slot, blow away the metal chips from the gear surface, so that the metal chips fall or are taken out of the gear slot by the airflow, and direct contact between the stylus and the contaminants during detection is avoided, since the airflow is located at the two ends of the stylus, during the transverse movement of the moving plate body (217) driven by the stylus, the directional airflow blows over the gear surface before the stylus, when the stylus subsequently contacts the gear surface, it contacts the clean gear surface that has been cleaned, so that the contact force between the stylus and the gear surface is stable. S3, when the gear completes positioning clamping, ensures its position fixed in the detection process, start the fifth drive motor (210), drive the first threaded rod (211) rotation, the first threaded rod (211) adopts double reverse thread, the moving block located on both sides of the threaded rod will carry on the symmetrical reverse movement along the axial direction, the moving block synchronously drives the second telescopic cylinder (202) and the concave plate body (203) to translate, the movement of the concave plate body (203) further drives the connecting plate body (213), and the first stylus (218) connected to the connecting plate body (213) also moves, gradually approaches the outer working tooth surface of the gear, until the first stylus (218) forms stable contact with the tooth profile surface, at this time, the first stylus (218) group starts to collect roughness data of the outer working tooth surface of the gear in real time, at the same time, the second drive motor (215) drives the rotating rod (216) to rotate, the rotating rod (216) drives the moving plate body (217) to deflect around its axis, the rotation angle of the moving plate body (217) is adjusted, so that the angle is consistent with the current gear slot inclination, when the moving plate body (217) is adjusted to the appropriate angle and deep into the gear slot, the second stylus (219) arranged on the upper and lower position moving plate body (217) surface will contact the top surface and the bottom surface in the gear slot at the same time, forming three-point synchronous detection of the outer tooth surface, the tooth top surface and the tooth bottom surface, which can detect the surface roughness of different parts of the gear at the same time; S4, in the detection process, when the first stylus (218) passes through the small ups and downs of the gear surface, the stylus tip will produce a small displacement change in the direction perpendicular to the tooth surface, when the moving plate body (217) deep into the gear slot and the angle is adjusted to match the inclination of the gear slot, the second stylus (219) group synchronously contacts the top surface and the bottom surface in the gear slot, similarly, the micro unevenness of the top surface and the bottom surface of the gear slot will cause the second stylus (219) to produce corresponding up and down displacement, these displacement changes reflect the micro characteristics of the gear surface roughness, the surface roughness measuring instrument (101) is equipped with an inductance sensor, when the first stylus (218) and the second stylus (219) produce displacement change, the sensor will convert these small mechanical displacement into proportional electric signal, for example, in the inductance sensor, the displacement of the stylus will change the inductance of the coil, and then cause the change of induced electromotive force, which is converted into electric signal output, the generated electric signal is transmitted to the surface roughness measuring instrument (101) from the first stylus (218) and the second stylus (219) through the signal transmission line, after receiving the electric signal, the surface roughness measuring instrument (101) will amplify the signal, through the built-in amplification circuit, the amplitude of the signal is amplified to the range suitable for subsequent analysis and processing, so as to clearly extract the surface roughness information contained in it, the surface roughness measuring instrument (101) transmits the digitized signal to the internal processor for calculation, and the surface roughness parameter value obtained by calculation will be displayed on the display screen of the surface roughness measuring instrument (101) S5, when the gear needs to be detected in different positions, in the process of using the first telescopic cylinder (207) to drive the piston rod to drive the clamping disc (208) to clamp the gear, the fourth drive motor (221) can be started to drive the clamping disc (208) to rotate, so that in the clamping process, the gear is driven to rotate, and the roughness of different positions of the gear is detected.

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