Rapid gearbox testing device
By designing a rapid testing device for transmissions and adopting semi-automatic control of braking and shifting components, the problem of poor testing accuracy in existing technologies has been solved, enabling efficient and accurate testing of transmissions and improving the consistency and convenience of testing.
Patent Information
- Application Number
- CN202511286113.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2025-11-14
AI Technical Summary
Existing testing devices for lawnmower gearboxes lack professional equipment, resulting in poor testing accuracy and an inability to accurately identify jamming and abnormal noises. This leads to low testing efficiency and the influx of substandard products into the market.
A rapid testing device for transmissions was designed, including a frame, an operating table, a brake assembly, a drive assembly, and a shift assembly. It adopts semi-automatic control and achieves automated testing by connecting the brake assembly and the shift assembly to the transmission assembly, ensuring the accuracy and convenience of testing.
It enables comprehensive system testing of transmissions, improves the consistency and convenience of testing, ensures the accuracy and efficiency of transmission testing, and reduces the inflow of unqualified products.
Smart Images
Figure CN120948048A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gearbox testing technology, specifically a rapid gearbox testing device. Background Technology
[0002] A lawnmower gearbox is a transmission device used to adjust the operating speed and steering of a lawnmower. It adjusts the power output of the lawnmower through a gear transmission system to achieve different operating speeds (such as low-speed mowing and high-speed sweeping) and steering functions. During the production process, in order to ensure that all gearboxes entering the market are qualified products, functional tests are usually required before leaving the factory to ensure that the gearboxes are qualified and fault-free.
[0003] Because existing lawnmower gearboxes lack professional testing equipment, they are usually judged for abnormal noises by manually shifting gears and driving. This method has poor testing accuracy and cannot accurately determine whether there is jamming or abnormal noises in the gearbox based on different values, thus reducing the accuracy of gearbox testing. In addition, purely manual testing is inefficient. Therefore, gearboxes are mostly tested by sampling, which still leads to some unqualified products entering the market.
[0004] Therefore, the present invention provides a rapid testing device for transmissions to solve the above-mentioned problems. Summary of the Invention
[0005] This invention provides a rapid testing device for transmissions, aiming to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid testing device for a gearbox, comprising a testing component, wherein the testing component includes a frame, and an operating platform is provided above the frame; The gearbox assembly is fixedly connected to the top of the control panel, and the gearbox assembly is provided with a first pulley, a neutral switch, a shift fork and a brake adjustment plate; The system includes a brake assembly, a drive assembly, and a shift assembly, all of which are located above the control panel. The drive end of the brake assembly is connected to the brake adjustment plate and is used for brake activation and deactivation control of the gearbox assembly. The drive end of the drive assembly is connected to the first pulley and is used for rotational drive of the gearbox assembly. The drive end of the shift assembly is connected to the shift fork and is used for gear shifting control of the gearbox assembly.
[0007] As a preferred technical solution of this application, a support frame is provided at one corner of the operating table, and a test terminal device is fixedly connected to the rotating end of the support frame. The test terminal device system has built-in final inspection software. A heat dissipation mechanism is provided on one side of the frame. A control terminal is provided on the front of the operating table. The control terminal is electrically connected to a power clamp, which is used for clamping and connecting the neutral switch. A positioning clamp is movably and fixedly connected above the operating table, and the positioning clamp is used for installing and fixing the gearbox assembly.
[0008] As a preferred technical solution of this application, the brake assembly includes a first motor, which is fixedly connected to the top of the operating table via an adjustable bracket. A first cylinder is also fixedly connected to the outer wall of the adjustable bracket. A telescopic shaft is telescopically inserted into the output end of the first motor. A hinge seat is fixedly connected to the other end of the telescopic shaft. A traction rod is hinged to the other end of the hinge seat. A positioning pin is inserted into the other end of the traction rod. A pulling plate is fixedly connected to the lifting end of the first cylinder, and the other end of the pulling plate is rotatably connected to the outside of the telescopic shaft.
[0009] As a preferred technical solution of this application, the traction rod is the driving end of the brake assembly. The end of the traction rod away from the hinge seat has a U-shaped structure, and the U-shaped structure is engaged with the outside of the brake adjustment plate. A positioning pin passes through the overlapping area of the brake adjustment plate and the traction rod. A locking bolt is inserted into one end of the positioning pin that passes through the outside of the traction rod, and the other end of the positioning pin has a stepped limiting structure.
[0010] As a preferred technical solution of this application, the drive assembly includes a second motor, which is fixedly connected to the top of the operating table via an adjustable bracket. The output end of the second motor extends through to the top of the adjustable bracket and is fixedly connected to a second pulley. A timing belt is connected to the outside of the second pulley, and the other end of the timing belt is sleeved on the outside of the first pulley. The timing belt is the drive end of the drive assembly.
[0011] As a preferred technical solution of this application, the shift assembly includes a third motor, which is fixedly connected to the top of the operating table via an adjustable bracket. The output end of the third motor extends through to the top of the adjustable bracket and is fixedly connected to a control shaft. The other end of the control shaft is fixedly connected to a threaded rod, and a threaded sleeve is threadedly connected to the outside of the threaded rod. A first hinge rod is sleeved on the outside of the control shaft. A second hinge rod is hinged to the other end of the first hinge rod, and a third hinge rod is hinged to the other end of the second hinge rod. A hexagonal sleeve is fixedly connected to the other end of the third hinge rod, and the hexagonal sleeve is sleeved on the outside of the shift fork.
[0012] As a preferred technical solution of this application, the first hinge rod and the second hinge rod are length-adjustable telescopic structures. The inner diameter of the lower half of the threaded sleeve is larger than the outer diameter of the control shaft. The bottom of the threaded sleeve abuts against the upper surface of the first hinge rod, and the outer wall of the threaded sleeve is provided with anti-slip texture. The first hinge rod is slidably sleeved on the outside of the control shaft. The hexagonal sleeve is the driving end of the shift assembly.
[0013] A test method for a rapid transmission test device includes the following steps; I. Tool Inspection: Transmission quick test device, open-end wrench, barcode scanner, marker pen; II. Material Inspection: Gearbox assembly, qualified labels, and labels pending processing; III. Testing Procedures: A. Mutual inspection: S1. Check the final inspection equipment, open-end wrench, and clean the workbench surface; S2. Check the cleanliness of the transmission assembly and the surface of the conformity label; B. Assembly and testing operations: S1. Place the assembled gearbox assembly on the operating table of the final inspection equipment. First, use an open-end wrench to manually shift the gears of the gearbox assembly once and then adjust it to the neutral position. Connect and install the drive end of the shift component with the shift fork. S2. Rotate to check if the brake assembly is in the initial position. Use your hand to connect the drive end of the brake assembly to the brake adjustment plate through the positioning pin. S3. Use the energizing clamps to hold the screws of the neutral switch respectively; S4. Mount the shift fork onto the neutral switch and the first pulley of the gearbox assembly; S5. Open the final inspection software inside the test terminal device and check that the corresponding test parameters are set correctly; S6. Press and hold the barcode scanner and scan the barcode on the transmission assembly to start the test; S7. Check the transmission assembly for any sticking or abnormal noise. If there are any problems, attach a "to be dealt with" label, write the reason with a marker, and place it in the rework area. S8. After passing the test, use the open handle to check that the shift fork is in the neutral position, and attach a qualified label. Then install the input shaft protective sleeve and arrange them neatly in the qualified area. C. Self-check: S1. Before testing, use an open-end wrench to turn all gears of the transmission assembly once, and then adjust it to the neutral position. S2. The output speed of the gearbox assembly is not lower than the set value. The power is turned on in neutral and disconnected in other gears. S3, the reverse gear braking current is 0.5A higher than the actual measured cable current; S4. Check that the transmission assembly makes no abnormal noises and that the qualified label is not detached. S5. After passing the test, use an open-end wrench to check that the shift fork is in the neutral position.
[0014] The beneficial effects of this application are as follows: This invention, in conjunction with a semi-automatic testing device, can perform comprehensive system testing of the transmission. Furthermore, the use of automated control switching during the testing process allows for more accurate determination of values during transmission testing, thus ensuring the consistency of the transmission testing process. Simultaneously, the brake assembly adopts a plug-in installation, connecting the drive end of the brake assembly to the brake adjustment plate of the transmission assembly. The shift assembly uses an upper and lower plug-in connection, connecting the drive end of the shift assembly to the shift fork of the transmission assembly. This facilitates the disassembly and assembly of the transmission assembly testing components, thereby improving the convenience of continuous testing. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the workbench surface structure of the present invention; Figure 3 This is a schematic diagram of the connection state structure of the gearbox assembly of the present invention; Figure 4 This is a schematic diagram of the overall structure of the gearbox assembly of the present invention; Figure 5 This is a schematic diagram of the overall structure of the shifting assembly of the present invention; Figure 6 This is a partial exploded view of the shift assembly of the present invention; Figure 7 This is a schematic diagram of the overall structure of the brake assembly of the present invention.
[0016] In the picture: 1. Test assembly; 11. Frame; 12. Operating table; 13. Support frame; 14. Heat dissipation mechanism; 15. Test terminal equipment; 16. Control terminal; 17. Positioning fixture; 2. Gearbox assembly; 21. First pulley; 22. Neutral switch; 23. Shift fork; 24. Brake adjusting plate; 3. Brake assembly; 31. First motor; 32. First cylinder; 33. Telescopic shaft; 34. Hinge seat; 35. Traction rod; 36. Positioning pin; 37. Locking bolt; 38. Pull plate; 4. Drive assembly; 41. Second motor; 42. Second pulley; 43. Synchronous belt; 5. Shift assembly; 51. Third motor; 52. Control shaft; 53. Threaded rod; 54. Threaded sleeve; 55. First hinge rod; 56. Second hinge rod; 57. Third hinge rod; 58. Hexagonal sleeve. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] like Figure 1-7 As shown, the present invention provides a rapid testing device for a transmission, including a testing component 1, which includes a frame 11 and an operating platform 12 disposed above the frame 11; a transmission assembly 2, which is fixedly connected above the operating platform 12 and includes a first pulley 21, a neutral switch 22, a shift fork 23, and a brake adjusting plate 24; a brake assembly 3, a drive assembly 4, and a shift assembly 5, all disposed above the operating platform 12, with the drive end of the brake assembly 3... The brake assembly 3 is connected to the brake adjustment plate 24 and is used for the brake opening and closing control of the gearbox assembly 2. The drive end of the drive assembly 4 is connected to the first pulley 21 and is used for the rotation drive of the gearbox assembly 2. The drive end of the shift assembly 5 is connected to the shift fork 23 and is used for the gear shifting control of the gearbox assembly 2. Through the cooperation of the brake assembly 3, drive assembly 4 and shift assembly 5, the automated testing process of the gearbox assembly 2 is completed, thereby improving the accuracy of the gearbox assembly 2 test.
[0019] Furthermore, a support frame 13 is provided at one corner of the operating table 12, and a test terminal device 15 is fixedly connected to the rotating end of the support frame 13. The test terminal device 15 has built-in final inspection software. A heat dissipation mechanism 14 is provided on one side of the frame 11. A control terminal 16 is provided on the front of the operating table 12. The control terminal 16 is electrically connected to a power clamp, which is used to clamp and connect the neutral switch 22. A positioning clamp 17 is movably and fixedly connected above the operating table 12. The positioning clamp 17 is used to install and fix the gearbox assembly 2. The fixed installation of the gearbox assembly 2 is completed by the positioning clamp 17 to ensure the stability of the gearbox assembly 2 during the test.
[0020] Furthermore, the brake assembly 3 includes a first motor 31, which is fixedly connected to the top of the operating table 12 via an adjustable bracket. A first cylinder 32 is also fixedly connected to the outer wall of the adjustable bracket. A telescopic shaft 33 is telescopically inserted into the output end of the first motor 31. A hinge seat 34 is fixedly connected to the other end of the telescopic shaft 33. A traction rod 35 is hinged to the other end of the hinge seat 34. A positioning pin 36 is inserted into the other end of the traction rod 35. A pulling plate 38 is fixedly connected to the lifting end of the first cylinder 32, and the other end of the pulling plate 38 is rotatably connected to... The telescopic shaft 33 is driven by the first motor 31 to rotate, thereby rotating the hinge seat 34 and the traction rod 35. This allows for adjustment of the initial angle of the traction rod 35, ensuring the stability of the connection between the traction rod 35 and the brake adjustment plate 24. Simultaneously, the activation of the first cylinder 32, connected by the traction plate 38, causes the telescopic shaft 33 to move back and forth. This, in turn, drives the brake adjustment plate 24 to rotate through the connection of the hinge seat 34 and the traction rod 35, thus completing the brake traction control of the gearbox assembly 2.
[0021] Furthermore, the traction rod 35 is the driving end of the brake assembly 3. The end of the traction rod 35 away from the hinge seat 34 has a U-shaped structure, and the U-shaped structure is engaged with the outside of the brake adjustment plate 24. A positioning pin 36 passes through the overlapping area of the brake adjustment plate 24 and the traction rod 35. A locking bolt 37 is inserted into one end of the positioning pin 36 that passes through the outside of the traction rod 35, and the other end of the positioning pin 36 has a stepped limiting structure.
[0022] Furthermore, the drive assembly 4 includes a second motor 41, which is fixedly connected to the top of the control panel 12 via an adjustable bracket. The output end of the second motor 41 extends through to the top of the adjustable bracket and is fixedly connected to a second pulley 42. A timing belt 43 is connected to the outside of the second pulley 42, and the other end of the timing belt 43 is sleeved on the outside of the first pulley 21. The timing belt 43 is the drive end of the drive assembly 4. By starting the second motor 41, the second pulley 42 is driven to rotate, and the timing belt 43 further drives the first pulley 21 to rotate, thereby realizing the speed control of the gearbox assembly 2.
[0023] Furthermore, the shift assembly 5 includes a third motor 51, which is fixedly connected to the top of the control panel 12 via an adjustable bracket. The output end of the third motor 51 extends through the top of the adjustable bracket and is fixedly connected to a control shaft 52. The other end of the control shaft 52 is fixedly connected to a threaded rod 53, and a threaded sleeve 54 is threadedly connected to the outside of the threaded rod 53. A first hinge rod 55 is sleeved on the outside of the control shaft 52. A second hinge rod 56 is hinged to the other end of the first hinge rod 55, and a third hinge rod 57 is hinged to the other end of the second hinge rod 56. Furthermore, a hexagonal sleeve 58 is fixedly connected to the other end of the third hinge rod 57. The hexagonal sleeve 58 is sleeved on the outside of the shift fork 23. By starting the third motor 51, the control shaft 52 can be rotated and adjusted. Then, under the angle rotation of the control shaft 52, the first hinge rod 55 is rotated. Furthermore, under the hinge of the second hinge rod 56, the other end of the second hinge rod 56 drives the third hinge rod 57 to rotate. Thus, the shift adjustment of the shift fork 23 can be realized through the connection between the hexagonal sleeve 58 and the shift fork 23.
[0024] Furthermore, the first hinge rod 55 and the second hinge rod 56 are length-adjustable telescopic structures. The telescopic structure of the first hinge rod 55 and the second hinge rod 56 facilitates stable insertion into the distribution position of the vibration shift fork 23, improving installation flexibility. The lower half of the threaded sleeve 54 has an inner diameter larger than the outer diameter of the control shaft 52. The bottom of the threaded sleeve 54 abuts against the upper surface of the first hinge rod 55, and the outer wall of the threaded sleeve 54 has anti-slip textures. The first hinge rod 55 slides up and down on the outside of the control shaft 52. The first hinge rod 55 is slidably connected to the control shaft 52, allowing it to slide up and down. This enables the hexagonal sleeve 58 to be adjusted up and down, facilitating the docking and installation of the hexagonal sleeve 58 with the shift fork 23. This further improves the ease of docking and installation of the component with the shift fork 23. At the same time, the threaded sleeve 54 abuts and positions the first hinge rod 55, ensuring the stability of the connection between the first hinge rod 55 and the control shaft 52. This allows the first hinge rod 55 to be rotated and adjusted in angle under the rotation of the control shaft 52. The hexagonal sleeve 58 is the driving end of the shift component 5.
[0025] A test method for a rapid transmission test device includes the following steps; I. Tool Inspection: Transmission quick test device, open-end wrench, barcode scanner, marker pen; II. Material Inspection: Gearbox assembly 2, qualified labels, and labels pending processing; III. Testing Procedures: A. Mutual inspection: S1. Check the final inspection equipment, open-end wrench, and clean the workbench surface; S2. Check the cleanliness of the transmission assembly 2 and the surface of the conformity label; B. Assembly and testing operations: S1. Place the assembled gearbox assembly 2 on the operating table 12 of the final inspection equipment. First, use an open-end wrench to manually shift the gears of the gearbox assembly 2 once and then adjust it to the neutral position. Connect and install the drive end of the shift component 5 with the shift fork 23. S2. Rotate to check if the brake assembly 3 is in the initial position. Use your hand to connect the drive end of the brake assembly 3 to the brake adjustment plate 24 through the positioning pin 36. S3. Use the energizing clamps to clamp the screws of the neutral switch 22 respectively; S4. The shift fork 23 is mounted on the neutral switch 22 and the first pulley 21 of the gearbox assembly 2; S5. Open the internal final inspection software of the test terminal device 15 and check that the corresponding test parameters are set correctly; The specific parameter settings are as follows:
[0026]
[0027]
[0028]
[0029] S6. Press and hold the barcode scanner and scan the two barcodes on the transmission assembly to start the test. S7. Check the transmission assembly 2 for any sticking or abnormal noise. If there are any problems, attach a "to be dealt with" label, write the reason with a marker, and place it in the rework area. Troubleshooting steps for equipment jamming due to overload (parts may be missing, or manual gear shifting may not have been performed before testing): Return to origin → Return to standby position (neutral) → Check if it is in neutral. If not, manually adjust and save → Restart after setting. Troubleshooting steps for abnormal noises in the gearbox: First, use an open-end wrench to adjust the gearbox to the maximum gear. Then, adjust the servo speed to 2500 RPM, start the servo motor and run it idle for about 30 seconds. Then, adjust the speed to 2150 RPM and test again. Check that there are no abnormal noises. Note: If shifting jams occur during testing, press the red emergency button immediately. Be careful as rotating the shifting motor a full circle may damage the sensor. If shifting jams occur during testing, adjustments should be made before testing. S8. After passing the test, use the open handle to check that the shift fork 23 is in the neutral position, and attach a qualified label. Then install the input shaft protective sleeve and arrange them neatly in the qualified area. C. Self-check: S1. Before testing, use an open-end wrench to turn all gears of the transmission assembly 2, and then shift to neutral. S2, the output speed of gearbox assembly 2 is not lower than the set value, the power is turned on in neutral, and the power is turned off in other gears; S3, the reverse gear braking current is 0.5A higher than the actual measured cable current; S4. Check the transmission assembly 2 for any abnormal noises, and ensure the pass label is not detached. S5. After passing the test, use an open-end wrench to check that the shift fork 23 is in the neutral position.
[0030] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A rapid testing device for a gearbox, characterized in that: The test component (1) includes a frame (11) and an operating table (12) is provided above the frame (11). The gearbox assembly (2) is fixedly connected above the control panel (12), and the gearbox assembly (2) is provided with a first pulley (21), a neutral switch (22), a shift fork (23) and a brake adjustment plate (24). Braking assembly (3), drive assembly (4) and shift assembly (5) are all located above the control panel (12). The drive end of the braking assembly (3) is connected to the brake adjustment plate (24) and is used for the brake opening and closing control of the gearbox assembly (2). The drive end of the drive assembly (4) is connected to the first pulley (21) and is used for the rotation drive of the gearbox assembly (2). The drive end of the shift assembly (5) is connected to the shift fork (23) and is used for the gear shifting control of the gearbox assembly (2).
2. The rapid testing device for a gearbox according to claim 1, characterized in that: A support frame (13) is provided at one corner of the operating table (12), and a test terminal device (15) is fixedly connected to the rotating end of the support frame (13). The test terminal device (15) has built-in final inspection software. A heat dissipation mechanism (14) is provided on one side of the frame (11). A control terminal (16) is provided on the front of the operating table (12). The control terminal (16) is electrically connected to a power clamp, which is used for clamping and connecting the neutral switch (22). A positioning clamp (17) is movably fixedly connected above the operating table (12), and the positioning clamp (17) is used for installing and fixing the gearbox assembly (2).
3. The rapid testing device for a gearbox according to claim 1, characterized in that: The brake assembly (3) includes a first motor (31), which is fixedly connected to the top of the operating table (12) via an adjustable bracket. A first cylinder (32) is also fixedly connected to the outer wall of the adjustable bracket. A telescopic shaft (33) is telescopically inserted into the output end of the first motor (31). A hinge seat (34) is fixedly connected to the other end of the telescopic shaft (33). A traction rod (35) is hinged to the other end of the hinge seat (34). A positioning pin (36) is inserted into the other end of the traction rod (35). A traction plate (38) is fixedly connected to the lifting end of the first cylinder (32), and the other end of the traction plate (38) is rotatably connected to the outside of the telescopic shaft (33).
4. The rapid testing device for a gearbox according to claim 3, characterized in that: The traction rod (35) is the driving end of the brake assembly (3). The end of the traction rod (35) away from the hinge seat (34) has a U-shaped structure, and the U-shaped structure is engaged with the outside of the brake adjustment plate (24). The area where the brake adjustment plate (24) and the traction rod (35) overlap is penetrated by a positioning pin (36). The end of the positioning pin (36) that penetrates to the outside of the traction rod (35) is connected to a locking bolt (37), and the other end of the positioning pin (36) is a stepped limiting structure.
5. The rapid testing device for a gearbox according to claim 1, characterized in that: The drive assembly (4) includes a second motor (41), which is fixedly connected above the operating table (12) via an adjustable bracket. The output end of the second motor (41) extends through the upper part of the adjustable bracket and is fixedly connected to a second pulley (42). A synchronous belt (43) is connected to the outside of the second pulley (42), and the other end of the synchronous belt (43) is sleeved on the outside of the first pulley (21). The synchronous belt (43) is the drive end of the drive assembly (4).
6. The rapid testing device for a gearbox according to claim 1, characterized in that: The shift assembly (5) includes a third motor (51), which is fixedly connected to the top of the control panel (12) via an adjustable bracket. The output end of the third motor (51) extends through the top of the adjustable bracket and is fixedly connected to a control shaft (52). The other end of the control shaft (52) is fixedly connected to a threaded rod (53). The threaded rod (53) is threadedly connected to a threaded sleeve (54). The control shaft (52) is fitted with a first hinge rod (55). The other end of the first hinge rod (55) is hinged to a second hinge rod (56). The other end of the second hinge rod (56) is hinged to a third hinge rod (57). The other end of the third hinge rod (57) is fixedly connected to a hexagonal sleeve (58). The hexagonal sleeve (58) is fitted on the outside of the shift fork (23).
7. The rapid testing device for a gearbox according to claim 6, characterized in that: The first hinge rod (55) and the second hinge rod (56) are length-adjustable telescopic structures. The lower half of the threaded sleeve (54) has an inner diameter larger than the outer diameter of the control shaft (52). The bottom of the threaded sleeve (54) abuts against the upper surface of the first hinge rod (55), and the outer wall of the threaded sleeve (54) is provided with anti-slip texture. The first hinge rod (55) slides up and down on the outside of the control shaft (52). The hexagonal sleeve (58) is the driving end of the shift assembly (5).
8. A testing method for a rapid transmission testing device, comprising testing using the rapid transmission testing device according to any one of claims 1-7, characterized in that: Includes the following steps; I. Tool Inspection: Transmission quick test device, open-end wrench, barcode scanner, marker pen; II. Material Inspection: Gearbox assembly (2), qualified label, and label to be processed; III. Testing Procedures: A. Mutual inspection: S1. Check the final inspection equipment, open-end wrench, and clean the workbench surface; S2. Check the cleanliness of the transmission assembly (2) and the surface of the qualified label; B. Assembly and testing operations: S1. Place the assembled gearbox assembly (2) on the operating table (12) of the final inspection equipment. First, use an open-end wrench to manually shift the gears of the gearbox assembly (2) once and then adjust it to the neutral position. Connect and install the drive end of the shift component (5) with the shift fork (23). S2. Rotate to check if the brake assembly (3) is in the initial position. Use your hand to connect the drive end of the brake assembly (3) to the brake adjustment plate (24) through the positioning pin (36). S3. Use the energizing clamps to clamp the screws of the neutral switch (22); S4. The shift fork (23) is fitted onto the neutral switch (22) and the first pulley (21) of the gearbox assembly (2); S5. Open the final inspection software inside the test terminal device (15) and check that the corresponding test parameters are set correctly; S6. Press and hold the barcode scanner and aim it at the transmission assembly (2) to scan the barcode and start the test. S7. Check the gearbox assembly (2) for any jamming or abnormal noise. If there is a problem, put a label to be dealt with and write the reason with a marker. Place it in the rework area. S8. After passing the test, use the open handle to check that the shift fork (23) is in neutral and attach a qualified label. Then install the input shaft protective sleeve and arrange them neatly in the qualified area. C. Self-check: S1. Before testing, use an open-end wrench to turn all gears of the gearbox assembly (2) once, and then adjust it to the neutral position; S2, the output speed of the gearbox assembly (2) is not lower than the set corresponding value. The power is turned on in neutral and the power is turned off in other gears. S3, the reverse gear braking current is 0.5A higher than the actual measured cable current; S4. Check the transmission assembly (2). There should be no abnormal noise, and the qualified label should not fall off. S5. After the test is passed, use an open-end wrench to check that the shift fork (23) is in the neutral position.