A spiral bevel gear noise detection device and a spiral bevel gear noise detection method

Abstract

The present invention relates to the field of mechanical detection technology, and in particular to a spiral bevel gear noise detection device, which includes an active drive unit, a driven drive unit, a detection unit, a noise collection and analysis unit, and a chassis. The active bevel gear to be tested is transmission-connected to the output end of the active drive unit, and the driven bevel gear to be tested is transmission-connected to the output end of the driven drive unit. The active drive unit and the driven drive unit are configured to enable the driven bevel gear to be tested to be separated from or meshed with the active bevel gear to be tested, and both the active drive unit and the driven drive unit are arranged on the chassis. The detection unit can detect the rotational speed and torque of the active bevel gear to be tested and the driven bevel gear to be tested, and the noise detection and analysis unit can collect and analyze noise data. The present invention also provides a spiral bevel gear noise detection method. By using the spiral bevel gear noise detection device in conjunction with the spiral bevel gear noise detection method, the meshing transmission noise of the spiral bevel gear can be accurately measured.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical detection, and in particular to a spiral bevel gear noise detection device and a spiral bevel gear noise detection method. Background Art

[0002] Vehicle vibration and noise can accelerate driver fatigue and affect their mood and health. The spiral bevel gears of the drive axle are a crucial component of the vehicle's transmission system, primarily providing speed reduction and torque generation. The meshing noise of these gears is a key indicator for evaluating drive axle quality. Currently, testing for meshing noise in drive axles relies primarily on subjective evaluation and objective data measurement. Subjective evaluation depends on the skill and experience of the tester, making it difficult to establish a unified standard. Objective data measurement is also subject to interference from ambient background noise and operating noise from the test equipment, making it difficult to obtain accurate meshing noise values.

[0003] Therefore, there is an urgent need for a spiral bevel gear noise detection device and a spiral bevel gear noise detection method to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a spiral bevel gear noise detection device that can be used to measure the meshing transmission noise of spiral bevel gears and can obtain relatively accurate measurement results.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A spiral bevel gear noise detection device, comprising:

[0007] An active drive unit, wherein the active bevel gear to be tested is connected to the output end of the active drive unit;

[0008] A driven drive unit, the driven bevel gear to be tested is transmission-connected to the output end of the driven drive unit, the active drive unit and the driven drive unit are configured to enable the driven bevel gear to be tested to be separated from or meshed with the active bevel gear to be tested;

[0009] A detection unit, wherein the detection unit is capable of detecting the rotational speed and torque of the detected driving bevel gear and the detected driven bevel gear;

[0010] A noise collection and analysis unit, wherein the noise detection and analysis unit is capable of collecting and analyzing noise data;

[0011] A chassis, on which the active drive unit and the driven drive unit are both arranged.

[0012] Optionally, a sliding unit is further included, which includes a slide rail and a slide table. The slide table can be slidably set on the slide rail, the slide rail is set on the chassis, the active drive unit is set on the slide table, and the length direction of the slide rail is parallel to the axial direction of the driven bevel gear to be measured.

[0013] Optionally, the sliding unit further includes a sliding drive member and a sliding transmission assembly, one end of the sliding transmission assembly is transmission-connected to the output end of the sliding drive member, and the other end is transmission-connected to the slide table.

[0014] Optionally, the sliding transmission assembly includes a driving wheel, a passive wheel, a belt, a screw rod and a nut, the driving wheel is connected to the output end of the sliding drive member, the belt transmission is connected to the driving wheel and the passive wheel, the passive wheel is coaxially connected to the screw rod, the nut is movably mounted on the screw rod, and the nut is connected to the slide.

[0015] Optionally, the detection unit includes a displacement sensor, and the displacement sensor is used to measure the moving distance of the slide.

[0016] Optionally, the active drive unit includes a driving wheel driving member and a driving wheel main shaft, one end of the driving wheel main shaft is transmission-connected to the output end of the driving wheel driving member, and the other end is transmission-connected to the tested driving bevel gear.

[0017] Optionally, the active drive unit further includes a first brake, which is arranged on the driving wheel main shaft.

[0018] Optionally, the active drive unit further includes a driving wheel fixture, the driving wheel fixture is transmission-connected to the driving wheel main shaft, and the driving wheel fixture is used to fix the driving bevel gear to be tested.

[0019] Optionally, the detection unit further includes a first torque sensor and a first rotational speed sensor, wherein the first torque sensor is used to test the torque of the driving wheel main shaft, and the first rotational speed sensor is used to test the rotational speed of the driving wheel main shaft.

[0020] Optionally, the driven drive unit includes a driven wheel driving member and a driven wheel main shaft, one end of the driven wheel main shaft is transmission-connected to the output end of the driven wheel driving member, and the other end is transmission-connected to the measured driven bevel gear.

[0021] Optionally, the driven drive unit further includes a second brake, which is arranged on the driven wheel spindle.

[0022] Optionally, the driven drive unit further includes a driven wheel fixture, the driven wheel fixture is transmission-connected to the driven wheel spindle, and the driven wheel fixture is used to fix the driven bevel gear to be measured.

[0023] Optionally, the detection unit further includes a second torque sensor and a second speed sensor, wherein the second torque sensor is used to test the torque of the driven wheel main shaft, and the second speed sensor is used to test the speed of the driven wheel main shaft.

[0024] Optionally, the noise detection and analysis unit includes a noise collector and a data analysis processor that are communicatively connected, and the noise collector is used to collect noise.

[0025] Another object of the present invention is to provide a spiral bevel gear noise detection method that can be applied to the measurement of the meshing transmission noise of spiral bevel gears to obtain more accurate measurement results.

[0026] To achieve this object, the present invention adopts the following technical solutions:

[0027] A spiral bevel gear noise detection method is applied to the above-mentioned spiral bevel gear noise detection device, and the spiral bevel gear noise detection method comprises the following steps:

[0028] Calculate the driven speed N11 and driven torque T11 of the driven bevel gear under test according to the preset parameters, the driving speed N01 and driving torque T01 of the driving bevel gear under test and the transmission ratio of the gear pair under test;

[0029] Separate the active bevel gear under test from the driven bevel gear under test, adjust the active drive unit and the driven drive unit to satisfy the following conditions: Na=N01, Ta=T01, Nb=N11, Tb=T11, where Na and Ta are the actual speed and actual torque of the active bevel gear under test, respectively, and Nb and Tb are the actual speed and actual torque of the driven bevel gear under test, respectively, and measure to obtain the ambient noise Lp2;

[0030] The active bevel gear to be tested is meshed with the driven bevel gear to be tested, and the active drive unit and the driven drive unit are adjusted to satisfy: Na=N01, Tb=T11, and the total noise Lp1 is measured;

[0031] Calculating the meshing transmission noise Lp3 of the gear pair under test based on the ambient noise Lp2 and the total noise Lp1;

[0032] The preset parameters are changed and the above operation is repeated to obtain a functional relationship between the meshing transmission noise Lp3 and the preset parameters.

[0033] Optionally, the formula for calculating the meshing transmission noise Lp3 is:

[0034] Beneficial effects of the present invention:

[0035] The present invention provides a spiral bevel gear noise detection device, comprising an active drive unit, a passive drive unit, a detection unit, a noise collection and analysis unit, and a chassis. The active bevel gear to be tested is transmission-connected to the output end of the active drive unit, and the passive drive unit to be tested is transmission-connected to the output end of the passive drive unit. The active drive unit and the passive drive unit are configured to enable the passive bevel gear to be tested to be separated from or meshed with the active bevel gear to be tested, and both the active drive unit and the passive drive unit are disposed on the chassis. The detection unit is capable of detecting the rotational speed and torque of the active bevel gear to be tested and the passive bevel gear to be tested, and the noise detection and analysis unit is capable of collecting and analyzing noise data. First, the passive bevel gear to be tested is separated from the active bevel gear to be tested, the active drive unit and the passive drive unit are started, and the environmental noise of the gear pair to be tested operating at a preset rotational speed and torque is measured. The environmental noise includes background noise and the operating noise of the spiral bevel gear noise detection device itself. The driven bevel gear under test is then meshed with the active bevel gear under test. Both the active and driven drive units are activated, and the total noise of the gear pair under test operating at a preset speed and torque is measured. This total noise includes not only the ambient noise but also the meshing transmission noise of the gear pair under test. Based on the ambient noise and total noise, the meshing transmission noise of the gear pair under test can be calculated. Therefore, when this spiral bevel gear noise detection device is used to measure the meshing transmission noise of spiral bevel gears, it can eliminate the influence of ambient noise, obtain more accurate measurement results, and adapt to different measurement environments, making it more versatile.

[0036] The present invention also provides a spiral bevel gear noise detection method, applicable to the aforementioned spiral bevel gear noise detection device. The spiral bevel gear noise detection method comprises the following steps: calculating the driven speed N11 and driven torque T11 of the driven bevel gear under test based on preset parameters, the driving speed N01 and driving torque T01 of the driving bevel gear under test, and the transmission ratio of the gear pair under test. The driving bevel gear under test is separated from the driven bevel gear under test, and the driving drive unit and the driven drive unit are adjusted to satisfy the following conditions: Na = N01, Ta = T01, Nb = N11, and Tb = T11, where Na and Ta are the actual speed and actual torque of the driving bevel gear under test, respectively, and Nb and Tb are the actual speed and actual torque of the driven bevel gear under test, respectively. The ambient noise Lp2 is measured. The driving bevel gear under test is meshed with the driven bevel gear under test, and the driving drive unit and the driven drive unit are adjusted to satisfy the following conditions: Na = N01 and Tb = T11. The total noise Lp1 is measured. Based on the ambient noise Lp2 and the total noise Lp1, the meshing transmission noise Lp3 of the gear pair under test is calculated. By changing the preset parameters and repeating the above steps, the functional relationship between meshing transmission noise Lp3 and the preset parameters is obtained. Using this spiral bevel gear noise detection method, the meshing transmission noise of spiral bevel gears can be accurately measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 1 is a schematic structural diagram of a spiral bevel gear noise detection device provided by an embodiment of the present invention;

[0038] Figure 2 It is a flow chart of a spiral bevel gear noise detection method provided by an embodiment of the present invention.

[0039] In the picture:

[0040] 1. Active drive unit; 11. Active wheel drive member; 12. Active wheel spindle; 13. First brake; 14. Active wheel fixture;

[0041] 2. Driven drive unit; 21. Driven wheel driving member; 22. Driven wheel spindle; 23. Second brake; 24. Driven wheel fixture;

[0042] 3. Chassis;

[0043] 4. Sliding unit; 41. Slide rail; 42. Slide table; 43. Sliding drive member; 44. Sliding transmission assembly; 441. Driving pulley; 442. Driven pulley; 443. Belt; 444. Screw;

[0044] 5. First torque sensor; 6. First speed sensor; 7. Second torque sensor; 8. Second speed sensor;

[0045] 9. Noise detection and analysis unit; 91. Noise collector; 92. Data analysis processor;

[0046] 100. The driving bevel gear to be tested; 200. The driven bevel gear to be tested. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0049] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0050] Currently, the detection of meshing transmission noise in spiral bevel gears on drive axles relies primarily on subjective evaluation and objective data measurement. Subjective evaluation depends on the skills and experience of the tester, making it difficult to establish a unified standard. Objective data measurement is also subject to interference from ambient background noise and operating noise from the test equipment, making it difficult to obtain accurate meshing transmission noise values.

[0051] Therefore, this embodiment provides a spiral bevel gear noise detection device to solve the above problem.

[0052] like Figure 1As shown, the spiral bevel gear noise detection device includes an active drive unit 1, a passive drive unit 2, a detection unit, a noise collection and analysis unit, and a chassis 3. The active bevel gear 100 under test is transmission-connected to the output end of the active drive unit 1, and the passive bevel gear 200 under test is transmission-connected to the output end of the passive drive unit 2. The active drive unit 1 and the passive drive unit 2 are configured to enable the passive bevel gear 200 under test to be separated from or meshed with the active bevel gear 100 under test. Both the active drive unit 1 and the passive drive unit 2 are mounted on the chassis 3. The detection unit is capable of detecting the rotational speed and torque of the active bevel gear 100 and the passive bevel gear 200 under test, and the noise detection and analysis unit 9 is capable of collecting and analyzing noise data. First, the passive bevel gear 200 under test is separated from the active bevel gear 100 under test, the active drive unit 1 and the passive drive unit 2 are started, and the ambient noise of the gear pair under test operating at a preset rotational speed and torque is measured. The ambient noise includes background noise and the operating noise of the spiral bevel gear noise detection device itself. The driven bevel gear 200 to be tested is then meshed and connected with the active bevel gear 100 to be tested, the active drive unit 1 and the driven drive unit 2 are started, and the total noise of the gear pair to be tested operating at a preset speed and torque is measured. The total noise includes not only the ambient noise but also the meshing transmission noise of the gear pair to be tested. Based on the ambient noise and the total noise, the meshing transmission noise of the gear pair to be tested can be calculated. Therefore, when the spiral bevel gear noise detection device is applied to the measurement of the meshing transmission noise of the spiral bevel gear, it can eliminate the influence of ambient noise, obtain more accurate measurement results, and can adapt to different measurement environments, making it more applicable.

[0053] In order to enable the driven bevel gear 200 to be tested and the active bevel gear 100 to have two states of separation and meshing connection, the spiral bevel gear noise detection device optionally further includes a sliding unit 4. Specifically, the sliding unit 4 includes a slide rail 41 and a slide table 42. The slide table 42 is slidably disposed on the slide rail 41. The slide rail 41 is disposed on the chassis 3. The active drive unit 1 is disposed on the slide table 42. The length direction of the slide rail 41 is parallel to the axial direction of the driven bevel gear 200 to be tested.

[0054] The axes of the tested driving bevel gear 100 and the tested driven bevel gear 200 of the spiral bevel gear are perpendicular to each other. Figure 1 As shown, the ab direction is the axial direction of the tested driven bevel gear 200, and the cd direction is the axial direction of the tested driving bevel gear 100, with the ab direction being perpendicular to the cd direction. The slide rail 41 is arranged along the ab direction, that is, the slide 42 can move along the ab direction, which can achieve the tested driving bevel gear 100 being close to the tested driven bevel gear 200 for meshing connection, and can also achieve the tested driving bevel gear 100 being away from the tested driven bevel gear 200, and the two can operate independently without interfering with each other.

[0055] Optionally, the sliding unit 4 further includes a sliding driving member 43 and a sliding transmission assembly 44 . One end of the sliding transmission assembly 44 is transmission-connected to the output end of the sliding driving member 43 , and the other end is transmission-connected to the slide 42 .

[0056] Optionally, the sliding transmission assembly 44 includes a driving wheel 441, a driven wheel 442, a belt 443, a screw rod 444, and a nut. The driving wheel 441 is connected to the output end of the sliding drive member 43. The belt 443 is connected to the driving wheel 441 and the driven wheel 442. The driven wheel 442 is coaxially connected to the screw rod 444. The nut is movably sleeved on the screw rod 444 and is connected to the slide 42. The sliding drive member 43 drives the driving wheel 441 to rotate. The driving wheel 441 drives the driven wheel 442 to rotate via the belt 443. The driven wheel 442 drives the screw rod 444 to rotate along its own axis. The nut can then move along the screw rod 444 to drive the slide 42 to move. It can be seen that the length direction of the screw rod 444 is the ab direction.

[0057] In order to accurately understand the relative distance between the tested driving bevel gear 100 and the tested driven bevel gear 200, the detection unit may optionally include a displacement sensor, which is used to measure the movement distance of the slide 42, thereby converting the relative distance between the tested driving bevel gear 100 and the tested driven bevel gear 200. This ensures that the relative distance between the tested driving bevel gear 100 and the tested driven bevel gear 200 remains consistent during multiple separation state tests.

[0058] Optionally, the active drive unit 1 includes a driving wheel driving member 11 and a driving wheel main shaft 12 , one end of the driving wheel main shaft 12 is transmission-connected to the output end of the driving wheel driving member 11 , and the other end of the driving wheel main shaft 12 is transmission-connected to the tested driving bevel gear 100 .

[0059] In order to provide a torsional moment when the tested active bevel gear 100 operates alone, the active drive unit 1 optionally further includes a first brake 13 , which is provided on the driving wheel main shaft 12 .

[0060] To facilitate the installation and removal of the tested driving bevel gear 100, the active drive unit 1 optionally further includes a driving wheel fixture 14, which is transmission-connected to the driving wheel spindle 12 and is used to fix the tested driving bevel gear 100. Optionally, the tested driving bevel gear 100 is threadedly connected to the driving wheel fixture 14 to ensure connection strength.

[0061] In order to obtain the rotational speed and torque of the tested driving bevel gear 100, optionally, the detection unit further includes a first torque sensor 5 and a first rotational speed sensor 6, the first torque sensor 5 is used to test the torque of the driving wheel main shaft 12, and the first rotational speed sensor 6 is used to test the rotational speed of the driving wheel main shaft 12.

[0062] The spiral bevel gear noise detection device also includes a control unit, which is communicatively connected to the driving wheel drive member 11, the first brake 13, the first torque sensor 5 and the first speed sensor 6 to adjust the driving wheel drive member 11 and the first brake 13 according to the torque and speed measured by the first torque sensor 5 and the first speed sensor 6 to ensure that the speed and torque of the measured driving bevel gear 100 meet the preset values.

[0063] Optionally, the driven drive unit 2 includes a driven wheel driving member 21 and a driven wheel main shaft 22, one end of the driven wheel main shaft 22 is transmission-connected to the output end of the driven wheel driving member 21, and the other end of the driven wheel main shaft 22 is transmission-connected to the measured driven bevel gear 200.

[0064] In order to apply a torsional torque when the driven bevel gear 200 under test is running, the driven drive unit 2 optionally further includes a second brake 23 , which is provided on the driven wheel spindle 22 .

[0065] To facilitate installation and removal of the driven bevel gear 200 to be tested, the driven drive unit 2 optionally further includes a driven wheel fixture 24, which is transmission-connected to the driven wheel spindle 22 and is used to fix the driven bevel gear 200 to be tested. Optionally, the driven bevel gear 200 to be tested is threadedly connected to the driven wheel fixture 24 to ensure connection strength.

[0066] In order to obtain the rotational speed and torque of the driven bevel gear 200 under test, the detection unit optionally further includes a second torque sensor 7 and a second rotational speed sensor 8, the second torque sensor 7 is used to test the torque of the driven wheel main shaft 22, and the second rotational speed sensor 8 is used to test the rotational speed of the driven wheel main shaft 22.

[0067] Similarly, the control unit is communicatively connected to the driven wheel driving member 21, the second brake 23, the second torque sensor 7 and the second speed sensor 8 to adjust the driven wheel driving member 21 and the second brake 23 according to the torque and speed measured by the second torque sensor 7 and the second speed sensor 8 to ensure that the speed and torque of the measured driven bevel gear 200 meet the preset values.

[0068] Optionally, the noise detection and analysis unit 9 includes a noise collector 91 and a data analysis processor 92 that are communicatively connected. The noise collector 91 is used to collect noise, and the data analysis processor 92 is used to analyze and process the data signal transmitted by the noise collector 91 to obtain the noise sound pressure level.

[0069] This embodiment also provides a spiral bevel gear noise detection method, which is applied to the above-mentioned spiral bevel gear noise detection device. The spiral bevel gear noise detection method includes the following steps:

[0070] First, the driven speed N11 and driven torque T11 of the driven bevel gear 200 are calculated based on preset parameters, the driving speed N01 and driving torque T01 of the driving bevel gear 100 and the transmission ratio of the gear pair.

[0071] Next, the active bevel gear 100 under test is separated from the driven bevel gear 200 under test. The active drive unit 1 and the driven drive unit 2 are adjusted to satisfy the following conditions: Na = N01, Ta = T01, Nb = N11, and Tb = T11. Na and Ta are the actual speed and torque of the active bevel gear 100 under test, respectively, and Nb and Tb are the actual speed and torque of the driven bevel gear 200 under test, respectively. The ambient noise Lp2 is measured. The ambient noise includes background noise and the operating noise of the spiral bevel gear noise detection device itself.

[0072] Then, the active bevel gear 100 under test is meshed with the driven bevel gear 200 under test. The active drive unit 1 and the driven drive unit 2 are adjusted to satisfy the following conditions: Na = N01, Tb = T11. The total noise Lp1 is measured. The total noise includes not only the ambient noise but also the meshing transmission noise of the gear pair under test.

[0073] Then, the meshing transmission noise Lp3 of the gear pair under test can be calculated based on the ambient noise Lp2 and the total noise Lp1. Optionally, the formula for calculating the meshing transmission noise Lp3 is:

[0074]

[0075] The above method can be used to determine the sound pressure level of the meshing transmission noise of the gear pair under test at any speed and torque. Furthermore, by changing the preset parameters and repeating the above steps, the functional relationship between the meshing transmission noise Lp3 and the preset parameters can be obtained. It can be seen that by simply changing the active speed N01 and active torque T01 of the active bevel gear 100 under test, the functional relationship between the active speed, active torque, and the meshing transmission noise of the gear pair under test can be obtained, accurately determining the optimal parameter range for the gear pair under test, thereby guiding the use scenario of the gear pair under test.

[0076] By using the above-mentioned spiral bevel gear noise detection device in conjunction with the above-mentioned spiral bevel gear noise detection method, the meshing transmission noise of the spiral bevel gear can be accurately measured, and the most suitable parameter range of the spiral bevel gear can also be obtained.

[0077] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A spiral bevel gear noise detection device, characterized in that: include: An active drive unit (1), wherein the active bevel gear (100) to be tested is transmission-connected to an output end of the active drive unit (1); A driven drive unit (2), wherein the driven bevel gear (200) to be measured is transmission-connected to an output end of the driven drive unit (2); a chassis (3), wherein the active drive unit (1) and the passive drive unit (2) are both arranged on the chassis (3); A sliding unit (4), wherein the sliding unit (4) is capable of separating or meshing the measured driven bevel gear (200) with the measured active bevel gear (100), the sliding unit (4) comprising a slide rail (41) and a slide table (42), the slide table (42) being slidably arranged on the slide rail (41), the slide rail (41) being arranged on the chassis (3), the active drive unit (1) being arranged on the slide table (42), and the length direction of the slide rail (41) being parallel to the axial direction of the measured driven bevel gear (200); a detection unit capable of detecting the rotational speed and torque of the detected driving bevel gear (100) and the detected driven bevel gear (200); A noise detection and analysis unit (9) is provided, wherein the noise detection and analysis unit (9) is capable of collecting and analyzing noise data.

2. The spiral bevel gear noise detection device according to claim 1, characterized in that: The sliding unit (4) further comprises a sliding drive member (43) and a sliding transmission assembly (44), one end of the sliding transmission assembly (44) is transmission-connected to the output end of the sliding drive member (43), and the other end is transmission-connected to the slide table (42).

3. The spiral bevel gear noise detection device according to claim 2, characterized in that: The sliding transmission assembly (44) comprises a driving wheel (441), a driven wheel (442), a belt (443), a screw rod (444) and a nut; the driving wheel (441) is connected to the output end of the sliding drive member (43); the belt (443) is transmission-connected to the driving wheel (441) and the driven wheel (442); the driven wheel (442) is coaxially connected to the screw rod (444); the nut is movably sleeved on the screw rod (444); and the nut is connected to the slide (42).

4. The spiral bevel gear noise detection device according to claim 1, characterized in that: The detection unit includes a displacement sensor, and the displacement sensor is used to measure the moving distance of the slide (42).

5. The spiral bevel gear noise detection device according to claim 1, characterized in that: The active drive unit (1) comprises a driving wheel drive member (11) and a driving wheel main shaft (12); one end of the driving wheel main shaft (12) is transmission-connected to the output end of the driving wheel drive member (11), and the other end is transmission-connected to the tested driving bevel gear (100).

6. The spiral bevel gear noise detection device according to claim 5, characterized in that: The active drive unit (1) further comprises a first brake (13), wherein the first brake (13) is arranged on the driving wheel main shaft (12).

7. The spiral bevel gear noise detection device according to claim 5, characterized in that: The active drive unit (1) further comprises a driving wheel fixture (14), wherein the driving wheel fixture (14) is transmission-connected to the driving wheel main shaft (12), and the driving wheel fixture (14) is used to fix the tested driving bevel gear (100).

8. The spiral bevel gear noise detection device according to claim 5, characterized in that: The detection unit further comprises a first torque sensor (5) and a first rotational speed sensor (6), wherein the first torque sensor (5) is used to test the torque of the driving wheel main shaft (12), and the first rotational speed sensor (6) is used to test the rotational speed of the driving wheel main shaft (12).

9. The spiral bevel gear noise detection device according to claim 1, characterized in that: The driven drive unit (2) comprises a driven wheel driving member (21) and a driven wheel main shaft (22); one end of the driven wheel main shaft (22) is transmission-connected to the output end of the driven wheel driving member (21), and the other end is transmission-connected to the measured driven bevel gear (200).

10. The spiral bevel gear noise detection device according to claim 9, characterized in that: The driven drive unit (2) further comprises a second brake (23), which is arranged on the driven wheel spindle (22).

11. The spiral bevel gear noise detection device according to claim 9, characterized in that: The driven drive unit (2) further comprises a driven wheel fixture (24), the driven wheel fixture (24) being transmission-connected to the driven wheel main shaft (22), and the driven wheel fixture (24) being used to fix the driven bevel gear (200) to be measured.

12. The spiral bevel gear noise detection device according to claim 9, characterized in that: The detection unit further comprises a second torque sensor (7) and a second rotational speed sensor (8), wherein the second torque sensor (7) is used to test the torque of the driven wheel main shaft (22), and the second rotational speed sensor (8) is used to test the rotational speed of the driven wheel main shaft (22).

13. The spiral bevel gear noise detection device according to claim 1, characterized in that: The noise detection and analysis unit (9) comprises a noise collector (91) and a data analysis processor (92) which are communicatively connected, and the noise collector (91) is used to collect noise.

14. A method for detecting noise of spiral bevel gears, characterized in that: Applied to the spiral bevel gear noise detection device according to any one of claims 1 to 13, the spiral bevel gear noise detection method comprises the following steps: Calculating the driven speed N11 and driven torque T11 of the driven bevel gear (200) to be tested based on preset parameters, the active speed N01 and active torque T01 of the active bevel gear (100) to be tested, and the transmission ratio of the gear pair to be tested; Separating a measured active bevel gear (100) from a measured driven bevel gear (200), adjusting an active drive unit (1) and a driven drive unit (2) to satisfy the following conditions: Na=N01, Ta=T01, Nb=N11, Tb=T11, wherein Na and Ta are respectively the actual rotational speed and actual torque of the measured active bevel gear (100), and Nb and Tb are respectively the actual rotational speed and actual torque of the measured driven bevel gear (200), and measuring and obtaining an environmental noise Lp2; The active bevel gear (100) to be tested is meshed with the driven bevel gear (200) to be tested, and the active drive unit (1) and the driven drive unit (2) are adjusted to satisfy: Na=N01, Tb=T11, and the total noise Lp1 is measured; Calculating the meshing transmission noise Lp3 of the gear pair under test based on the ambient noise Lp2 and the total noise Lp1; The preset parameters are changed and the above operation is repeated to obtain a functional relationship between the meshing transmission noise Lp3 and the preset parameters.

15. The spiral bevel gear noise detection method according to claim 14, characterized in that: The formula for calculating the meshing transmission noise Lp3 is: .

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