Gearbox detection equipment

Abstract

The invention provides a gearbox detection device. The gearbox comprises an input shaft, an intermediate shaft, an output shaft and a lower shell, and the shafts are contained in the lower shell. The gearbox detection equipment comprises a mounting assembly, a matching assembly and a driving assembly, the mounting assembly comprises a mounting station, the mounting station comprises a first mounting hole, the mounting station is used for mounting a lower shell, the first mounting hole and an input shaft are oppositely arranged, and the axis of the first mounting hole extends in the first direction. The matching assembly is arranged on one side of the mounting assembly in the first direction and comprises a first centering sleeve, a second centering sleeve and a third centering sleeve, and the first centering sleeve and the input shaft are coaxially arranged; the second centering sleeve and the middle part are coaxially arranged; the third centering sleeve and the output shaft are coaxially arranged; the centering sleeve moves towards or away from the mounting station in the first direction. The driving assembly is used for applying driving force to the input shaft. By adopting the gearbox detection equipment provided by the invention, the testing efficiency of the gearbox can be improved, and the production cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of gearbox testing, and in particular to gearbox testing equipment. Background Art

[0002] A car's noise, vibration, and harshness are collectively referred to as its NVH characteristics. NVH characteristic testing is a key step in car development and manufacturing, and is an important indicator for measuring car quality.

[0003] During current automotive development and manufacturing processes, NVH testing of transmissions is performed after the transmission is assembled. Consequently, transmissions that fail the test must be disassembled, reassembled, and re-selected with the appropriate components. This makes transmission NVH testing time-consuming and labor-intensive, and increases manufacturing costs.

[0004] Therefore, how to improve the testing efficiency of automobile gearboxes and reduce manufacturing costs has become a difficult problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The present application discloses a gearbox testing device for improving the performance testing efficiency of the gearbox while reducing manufacturing costs.

[0006] The present application provides a gearbox testing device. The gearbox may include an input shaft, a driving gear, an intermediate shaft, a first driven gear set, an output shaft, a second driven gear set, and a lower housing. The input shaft, the driving gear, the first driven gear set, the intermediate shaft, the output shaft, and the second driven gear set are housed in the lower housing. The first driven gear set includes a first driven gear and a second driven gear. The input shaft is inserted into the gear bore of the driving gear, the intermediate shaft is inserted into the gear bores of the first and second driven gears, and the driving gear meshes with the first driven gear. The second driven gear set includes a third driven gear, the output shaft is inserted into the gear bore of the third driven gear, and the second driven gear meshes with the third driven gear. The axes of the input shaft, the intermediate shaft, and the output shaft are parallel. The gearbox testing device includes: a mounting assembly, a mating assembly, and a driving assembly. The mounting assembly includes an mounting station, the mounting station including a first mounting hole, for mounting the lower housing. The first mounting hole is configured to be disposed opposite the input shaft. The axis of the first mounting hole extends in a first direction. The mating assembly is disposed on one side of the mounting assembly along a first direction, and includes a first centering sleeve, a second centering sleeve, and a third centering sleeve. The first centering sleeve is configured to be coaxially disposed with the input shaft; the second centering sleeve is configured to be coaxially disposed with the intermediate shaft; and the third centering sleeve is configured to be coaxially disposed with the output shaft. The first centering sleeve, the second centering sleeve, and the third centering sleeve are movable toward or away from the mounting station along the first direction. This facilitates accurate alignment of the first centering sleeve with the input shaft, the second centering sleeve with the intermediate shaft, and the third centering sleeve with the output shaft after the first centering sleeve, the second centering sleeve, and the third centering sleeve are moved along the first direction to the mounting station, thereby limiting the position of the input shaft, the intermediate shaft, and the output shaft, so that the gearbox to be tested meets the test requirements under actual working conditions.

[0007] After the transmission test is complete, the mating assembly moves away from the installation station to separate the first centering sleeve from the input shaft, the second centering sleeve from the intermediate shaft, and the third centering sleeve from the output shaft. If the transmission fails the test, the failed components can be replaced without unpacking the transmission, as the transmission is still unassembled. This reduces the risk of damage to transmission components during rework, helping to reduce production costs and improve efficiency.

[0008] The drive assembly applies a driving force to the input shaft of the gearbox being tested. This force can be varied to suit different test requirements, improving the test equipment's versatility across different gearbox models.

[0009] In one possible implementation of the present application, the gearbox further comprises a first bearing inner ring and a second bearing inner ring, the input shaft's end facing away from the lower housing being plugged into the first bearing inner ring, and the intermediate shaft's end facing away from the lower housing being plugged into the second bearing inner ring. The mating assembly further comprises a first bearing outer ring, a second bearing outer ring, and a differential core shaft. The first bearing outer ring is housed in a first centering sleeve and is adapted to be sleeved around the outside of the first bearing inner ring; the second bearing outer ring is housed in a second centering sleeve and is adapted to be sleeved around the outside of the second bearing inner ring; the differential core shaft is housed in a third centering sleeve and is adapted to be connected to the output shaft. This facilitates improved mating accuracy when the first centering sleeve mates with the input shaft, the second centering sleeve mates with the intermediate shaft, and the third centering sleeve mates with the output shaft, thereby making test data more convincing.

[0010] In one possible implementation of the present application, the mating assembly further includes a counterweight, which is coupled to the first centering sleeve and positioned along a first direction on a side of the first centering sleeve distal from the mounting assembly. The counterweight is configured to apply a force along the first direction to the input shaft. The counterweight of the present application is comprised of multiple weights of varying masses. This allows the force applied to the input shaft along the first direction to be varied by adding or removing weights according to specific test requirements, thereby satisfying the transmission's testing requirements under various test forces.

[0011] In one possible implementation of the present application, the transmission testing device further includes a first cylinder, located along a first direction on a side of the mating assembly away from the mounting assembly, and configured to apply a force along the first direction to the intermediate shaft. The first cylinder also includes a first cylinder push rod, which is connected to a second centering sleeve and moves along the first direction. This facilitates obtaining test results when different test forces are applied to the transmission intermediate shaft, thereby improving the credibility of the test data.

[0012] In one possible implementation of the present application, the transmission testing device further includes a second cylinder, located along the first direction on a side of the mating assembly away from the mounting assembly, and configured to apply a force along the first direction to the differential shaft. The second cylinder also includes a second cylinder push rod, which is connected to a third centering sleeve and moves along the first direction. This facilitates obtaining test results when different test forces are applied to the transmission's differential shaft, thereby improving the credibility of the test data.

[0013] In one possible implementation of the present application, the gearbox detection device further includes a support frame, the mounting assembly and the mating assembly are disposed on the support frame along a first direction, and the mating assembly is slidably connected to the support frame along the first direction, thereby improving the stability of the gearbox detection device.

[0014] In one possible implementation of the present application, the mounting assembly further includes a first slide, the mounting station being mounted on the first slide, the first slide being slidably connected to the support frame, and the first slide being movable toward or away from the mating assembly along a first direction. This facilitates adaptability to gearboxes of various sizes.

[0015] In one possible implementation of the present application, the transmission testing device further includes a workbench assembly disposed on a side of the mounting assembly away from the mating assembly along a first direction. The workbench assembly includes a third cylinder, which includes a third cylinder push rod connected to the first slide and movable along the first direction. This facilitates improving the automation level of the transmission testing device.

[0016] In one possible implementation of the present application, the workbench assembly further includes a mounting plate and a locating pin, the locating pin being disposed on a side of the mounting plate proximate to the mounting assembly along a first direction. The mounting station includes a locating hole, the locating hole being disposed opposite the locating pin along the first direction. Thus, the locating pin can be inserted into the locating hole to achieve positioning between the mounting station and the drive assembly, which also helps improve the precision of the fit between the output shaft of the gearbox to be tested and the loading assembly.

[0017] In one possible implementation of the present application, the installation station is slidably connected to the first slide and moves toward or away from the support frame along a second direction; the first direction is perpendicular to the second direction. This facilitates installation of the gearbox to be inspected at the installation station, improving installation convenience.

[0018] In one possible implementation of the present application, the transmission testing device further includes a fourth cylinder, which includes a fourth cylinder push rod, which is connected to the installation station and moves in the second direction. This helps improve the automation level of the transmission testing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of the gearbox detection device provided in an embodiment of the present application;

[0020] Figure 2 A schematic structural diagram of a first-view assembly provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of the loading device provided in an embodiment of the present application;

[0022] Figure 4 A schematic structural diagram of a second perspective of a matching assembly provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of the detection equipment support frame and cylinder arrangement provided in an embodiment of the present application;

[0024] Figure 6 A left side view of the gearbox detection device provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of the working components provided in the embodiment of the present application;

[0026] Figure 8 A schematic structural diagram of the mounting assembly and the fourth cylinder from a first perspective provided in an embodiment of the present application;

[0027] Figure 9 A schematic structural diagram of the mounting assembly and the fourth cylinder from a second perspective provided in an embodiment of the present application;

[0028] Figure 10 A schematic diagram of the structure of the drive assembly provided in an embodiment of the present application.

[0029] Figure 1: 1-installation assembly; 11-installation station; 111-tooling plate; 112-third slide; 1121-second linear guide; 12-first slide; 121-first slider; 122-cylinder hanging plate; 123-second slider; 13-second blocking block; 14-calibration assembly; 15-limiting block support; 16-first oil receiving tank; 17-second oil receiving tank; 2-matching assembly; 21-first centering sleeve; 22-second centering sleeve; 23-third centering sleeve Core sleeve; 24-first bearing outer ring; 25-second bearing outer ring; 26-differential core shaft; 261-second spline; 27-oil shield; 28-second slide plate; 29-counterweight; 210-first linear bearing; 211-second linear bearing; 212-oil-free bearing; 3-drive assembly; 31-second servo motor; 32-second coupling; 33-second spindle mounting box; 34-second connecting shaft; 35-torque calibration ring; 36-torque sensor; 37-torque Torque limiter; 4-loading device; 41-first servo motor; 42-first reducer; 43-first coupling; 44-first mechanical spindle; 45-first connecting shaft; 451-first spline; 46-angle encoder; 47-degree encoder mounting seat; 48-first spindle mounting box; 5-first cylinder; 51-first cylinder push rod; 52-first cylinder joint seat; 6-second cylinder; 61-second cylinder push rod; 62-second cylinder joint seat; 7-support Frame; 71-first plate surface; 72-second plate surface; 73-connecting plate surface; 74-first linear guide rail; 75-first blocking block; 8-workbench assembly; 81-third cylinder; 82-third cylinder push rod; 83-third cylinder joint seat; 84-mounting plate; 85-locating pin; 86-first oil seal; 87-first oil seal mounting seat; 88-second oil seal; 89-second oil seal mounting seat; 810-oil receiving box; 9-fourth cylinder; 91-fourth cylinder joint seat. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] Currently, after manufacturing, automotive transmissions are subject to performance testing. Test items typically include noise, vibration, and harshness (NVH) testing. However, it's well known that transmission NVH testing is typically performed after the transmission is assembled. It should be noted that assembly involves the installation of the transmission's internal components within the upper and lower housings, followed by fastening and sealing the two housings to achieve a rigid connection. The upper housing primarily mates with the lower housing, positioning the transmission assembly within the transmission to prevent movement or separation during operation. Therefore, transmissions that fail NVH testing require the upper and lower housings to be forcibly separated, and some of the components installed within the two housings to be disassembled. These components must then be reassembled after selecting the appropriate components. This makes transmission NVH testing both time-consuming and labor-intensive, and increases manufacturing costs.

[0032] In view of this, the transmission testing device provided in the embodiment of the present application is provided with a positioning structure for positioning the transmission assembly inside the transmission. In this way, when testing the transmission, the upper housing and the transmission assembly provided in the transmission testing device can be matched with the positioning structure to prevent the transmission assembly inside from shaking or separating, thereby achieving the effect of simulating the NVH characteristics test of the transmission after the gearbox is mated. This can avoid the forced separation of the upper and lower housings of the transmission that fails the test, improve testing efficiency, and reduce manufacturing costs. The transmission testing device provided in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0033] In the implementation of this application, the gearbox to be tested may include an input shaft, a driving gear, an intermediate shaft, a first driven gear set, an output shaft, a second driven gear set, and a lower housing. The input shaft, the driving gear, the first driven gear set, the intermediate shaft, the output shaft, and the second driven gear set are accommodated in the lower housing. The first driven gear set includes a first driven gear and a second driven gear. The input shaft is inserted into the gear bore of the driving gear. The intermediate shaft is inserted into the gear bores of the first and second driven gears, and the driving gear meshes with the first driven gear. The second driven gear set includes a third driven gear. The output shaft is inserted into the gear bore of the third driven gear. The second driven gear meshes with the third driven gear. The axes of the input shaft, the intermediate shaft, and the output shaft are parallel. The gearbox to be tested is not provided with an upper housing during the testing process, that is, the gearbox to be tested is in an unassembled state.

[0034] refer to Figure 1 , Figure 1 Schematic diagram of the overall structure of the gearbox detection device provided in the embodiment of the present application. In the present application, the gearbox detection device includes a mounting assembly 1, a mating assembly 2 and a driving assembly 3, wherein the mounting assembly 1 includes an installation station 11, and the installation station 11 includes a first mounting hole ( Figure 1 (not shown in the figure), the mounting station 11 is used to mount the lower housing, and the first mounting hole is used to be arranged opposite to the input shaft; the axis of the first mounting hole extends along the first direction.

[0035] It should be noted that the shape of the first mounting hole is not limited in this application. For example, the first mounting hole is a round hole or an oblong hole, and to facilitate the installation of the gearbox to be tested, the aperture of the first mounting hole of the installation station 11 is larger than the diameter of the input shaft.

[0036] The mating component 2 is arranged on one side of the mounting component 1 along the first direction, referring to Figure 2 , Figure 2 This is a schematic diagram of the structure of the mating assembly provided in an embodiment of the present application from a first perspective. The mating assembly 2 includes a first centering sleeve 21, a second centering sleeve 22, and a third centering sleeve 23. The first centering sleeve 21 is configured to be coaxial with the input shaft; the second centering sleeve 22 is configured to be coaxial with the intermediate shaft; and the third centering sleeve 23 is configured to be coaxial with the output shaft. The first, second, and third centering sleeves 21, 22, 23 move along a first direction toward or away from the installation station.

[0037] It is understood that in the present application, when the lower housing of the gearbox to be tested is installed in the installation station 11, the first centering sleeve 21 is arranged relative to the input shaft, the second centering sleeve 22 is arranged relative to the intermediate shaft, and the third centering sleeve 23 is arranged relative to the output shaft. This facilitates accurate alignment of the first centering sleeve 21 with the input shaft, the second centering sleeve 22 with the intermediate shaft, and the third centering sleeve 23 with the output shaft after the first centering sleeve 21, the second centering sleeve 22, and the third centering sleeve 23 are moved in the first direction to the installation station 11, thereby limiting the position of the input shaft, the intermediate shaft, and the output shaft, so that the gearbox to be tested meets the test requirements under actual working conditions.

[0038] After the transmission test is complete, the mating assembly 2 is moved away from the installation station to separate the first centering sleeve 21 from the input shaft, the second centering sleeve 22 from the intermediate shaft, and the third centering sleeve 23 from the output shaft. If the transmission passes the test, it can be transported to the next assembly process for assembly. If the transmission fails the test, since the transmission is not assembled at this time, the failed components can be replaced without unpacking the transmission. This reduces the risk of damage to the components during rework of the failed transmission, helping to reduce production costs and improve production efficiency.

[0039] You can continue to refer to Figure 1 In this application, the drive assembly 3 is used to apply a driving force to the input shaft of the gearbox to be tested. The drive assembly 3 can apply different driving force values ​​according to different test requirements, thereby improving the versatility of the test equipment for testing different models of gearboxes.

[0040] For ease of explanation, in the embodiment of the present application, the first direction may be defined as the Z direction.

[0041] Continue to refer Figure 1 In order to more accurately simulate the gearbox operation scenario when the car is driving in a straight line, thereby increasing the accuracy of the test equipment, in this application, the gearbox testing equipment further includes a loading device 4, which is used to apply force to the end of the output shaft away from the installation station 11. Figure 3 , Figure 3 Schematic diagram of the structure of the loading device provided in an embodiment of the present application. In the present application, the loading device 4 includes a first servo motor 41, a first reducer 42, a first coupling 43, a first mechanical main shaft 44 and a first connecting shaft 45, and the output end of the first servo motor 41 is connected to the first reducer 42, the first coupling 43, the first mechanical main shaft 44 and the first connecting shaft 45 in sequence, the axis of the first connecting shaft 45 is along the first direction, and the first connecting shaft 45 is provided with a first spline 451 at one end close to the output shaft of the gearbox along the first direction, and a first spline groove ( Figure 3 (not shown), and the first spline groove is arranged opposite to the first spline 451 along the first direction. In the test state, the first spline 451 is completely inserted into the first spline groove.

[0042] It is worth mentioning that, in order to simulate the transmission operation scenario under the vehicle cornering condition, the loading device 4 also includes an angle encoder 46. The angle encoder 46 is used to measure, detect, and control the rotation of the first servo motor 41. The angle encoder 46 can convert the rotation angle into a digital signal for accurately measuring and controlling the rotation angle of the first servo motor 41. The angle encoder 46 is connected to the first servo motor 41.

[0043] In addition, the loading device 4 also includes an angle encoder mounting seat 47 and a first spindle mounting box 48. The first coupling 43, the mechanical spindle, the angle encoder 46 and the angle encoder mounting seat 47 are accommodated in the first spindle mounting box 48. The angle encoder 46 is installed on the angle encoder mounting seat 47. The first spindle mounting box 48 is used to fix the loading device 4 as a whole.

[0044] In this application, the gearbox to be tested also includes a first bearing inner ring and a second bearing inner ring, the end of the input shaft away from the lower housing is inserted into the first bearing inner ring, and the end of the intermediate shaft away from the lower housing is inserted into the second bearing inner ring.

[0045] Continue to refer Figure 2 In this application, mating assembly 2 also includes a first bearing outer ring 24, a second bearing outer ring 25, and a differential shaft 26. The first bearing outer ring 24 is housed in the first centering sleeve 21 and is designed to fit over the outside of the first bearing inner ring. The second bearing outer ring 25 is housed in the second centering sleeve 22 and is designed to fit over the outside of the second bearing inner ring. The differential shaft 26 is housed in the third centering sleeve 23 and is designed to connect to the output shaft. This improves the mating accuracy when the first centering sleeve 21 is mated with the input shaft, the second centering sleeve 22 is mated with the intermediate shaft, and the third centering sleeve 23 is mated with the output shaft, thereby making the test data more convincing.

[0046] In this application, the first bearing inner ring is the inner ring of a separable bearing, and the first bearing outer ring 24 is the outer ring of a separable bearing. For example, the separable bearing can be a tapered roller bearing. Since tapered roller bearings are separable bearings and both the inner and outer rings have tapered raceways, after the first bearing outer ring 24 is housed in the first centering sleeve 21 and the second bearing outer ring 25 is housed in the second centering sleeve 22, as the mating assembly 2 is moved along the Z direction toward the installation station 11, the first bearing outer ring 24 is fitted over the outer side of the first bearing inner ring to form a complete bearing, and the second bearing outer ring 25 is fitted over the outer side of the second bearing inner ring to form a complete bearing, and each bearing can function normally.

[0047] Continue to refer Figure 2 The differential core shaft 26 is provided with a second spline 261 at one end close to the lower housing along the first direction, and the output shaft is provided with a second spline groove at one end close to the differential core shaft 26 along the first direction ( Figure 2 (not shown), the second spline groove and the second spline 261 are arranged opposite each other along the first direction. Because the differential shaft 26 is coaxial with the output shaft, when the mating assembly 2 is moved in the Z direction to engage with the lower housing, the second spline 261 at the connecting end of the differential shaft 26 will insert into the second spline groove. This not only meets the requirements for testing the transmission in the closed state, but also improves the stability of the connection between the differential shaft 26 and the transmission to be tested.

[0048] Continue to refer Figure 2 The mating component 2 also includes an oil shield 27 and a second slide 28, and at least a portion of the first centering sleeve 21, the second centering sleeve 22, and the third centering sleeve 23 are arranged in the oil shield 27. In an embodiment of the present application, by arranging at least a portion of the first centering sleeve 21, the second centering sleeve 22, and the third centering sleeve 23 in the oil shield 27, oil pollution can be prevented from leaking out randomly during the test. The oil shield 27 is set on the second slide 28, and the second slide 28 moves along the first direction toward or away from the mounting component 1. This is conducive to improving the stability of the mating component 2 when it moves along the first direction.

[0049] refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the mating assembly provided in an embodiment of the present application from a second perspective. In this application, the mating assembly 2 further includes a counterweight 29, which is connected to the first centering sleeve 21. The counterweight 29 is located on a side of the first centering sleeve 21 away from the mounting assembly 1 along the first direction, and the counterweight 29 is used to apply a force along the first direction to the input shaft.

[0050] It is worth mentioning that in order to avoid the formation of a rigid connection between the counterweight block 29 and the first centering sleeve 21, the mating component 2 also includes a first linear bearing 210, which is arranged between the counterweight block 29 and the second slide 28 along the first direction, and the first linear bearing 210 is installed on the second slide 28, and the first centering sleeve 21 moves along its axis in the first linear bearing 210.

[0051] In this application, the counterweight block 29 is composed of multiple weights of different masses. According to specific test requirements, the value of the force applied to the input shaft along the first direction can be changed by adding or reducing the weights, thereby meeting the detection requirements of the gearbox under various test forces.

[0052] refer to Figure 5 , Figure 5 A schematic diagram of the structure of the support frame and cylinder arrangement of the testing equipment provided in an embodiment of the present application. To obtain test results of different force values ​​at the same position on the transmission, the transmission testing equipment in this application also includes a first cylinder 5. The first cylinder 5 is located on the side of the mating component 2 away from the mounting component 1 along the first direction, and the first cylinder 5 is used to apply a force along the first direction to the intermediate shaft. The first cylinder 5 includes a first cylinder push rod 51, which is connected to the second centering sleeve 22 and moves along the first direction.

[0053] Continue to refer Figure 5 In this application, the transmission testing device further includes a second cylinder 6, which is located along the first direction on the side of the mating assembly 2 away from the mounting assembly 1. The second cylinder 6 is used to apply a force along the first direction to the differential shaft 26. The second cylinder 6 includes a second cylinder push rod 61, which is connected to the third centering sleeve 23 and moves along the first direction. This allows test results to be obtained when different test forces are applied to the transmission's differential shaft 26, thereby improving the credibility of the test data.

[0054] It is worth mentioning that the second cylinder push rod 61 can be directly connected to the third centering sleeve 23, which is conducive to directly applying force to the output shaft. In addition, in order to avoid the formation of a rigid connection between the first cylinder 5 and the second centering sleeve 22, and to avoid the formation of a rigid connection between the second cylinder 6 and the third centering sleeve 23. Figure 6 , Figure 6This is a left view of the transmission detection device provided in an embodiment of the present application. In this application, the transmission detection device further includes a second linear bearing 211 and an oil-free bearing 212. The second linear bearing 211 is disposed along the first direction on the side of the second slide 28 away from the mounting assembly 1, and is located between the second slide 28 and the first cylinder 5. The second linear bearing 211 is mounted on the second slide 28, and the second centering sleeve 22 moves along its axis within the second linear bearing 211. The oil-free bearing 212 is disposed along the first direction on the side of the second slide 28 away from the mounting assembly 1, and is located between the differential shaft 26 and the second cylinder 6, allowing the differential shaft 26 to move along its axis within the third centering sleeve 23.

[0055] Continue to refer Figure 5 and Figure 6 In the present application, the first cylinder 5 also includes a first cylinder joint seat 52, which is arranged on the side of the first cylinder push rod 51 close to the second linear bearing 211, and the first cylinder joint seat 52 is connected to the first cylinder push rod 51 on one side along the first direction, and connected to the second centering sleeve 22 on the other side.

[0056] The second cylinder 6 also includes a second cylinder joint seat 62, which is arranged on the side of the second cylinder push rod 61 close to the oil-free bearing 212, and the second cylinder joint seat 62 is connected to the second cylinder push rod 61 on one side along the first direction and connected to the third centering sleeve 23 on the other side.

[0057] It is worth mentioning that, to further improve test accuracy, in this application, the transmission testing equipment may simultaneously include a counterweight 29, a first cylinder 5, and a second cylinder 6. The counterweight 29 is connected to the second slide 28 or the first centering sleeve 21. The counterweight 29 is located in the first direction on the side of the input shaft away from the mounting assembly 1 and is used to apply a force in the first direction to the input shaft. The first cylinder 5 is located in the first direction on the side of the input shaft away from the mounting assembly 1 and is used to apply a force in the first direction to the intermediate shaft. The first cylinder 5 includes a first cylinder push rod 51, which is connected to the second centering sleeve 22 and moves in the first direction. The second cylinder 6 is located in the first direction on the side of the mating assembly 2 away from the mounting assembly 1 and is used to apply a force in the first direction to the output shaft. The second cylinder 6 includes a second cylinder push rod 61, which is connected to the third centering sleeve 23 and moves in the first direction.

[0058] Continue to refer Figure 5 and Figure 6In the present application, to improve the stability of the gearbox detection equipment, the gearbox detection equipment further includes a support frame 7, wherein the mounting assembly 1 and the mating assembly 2 are disposed on the support frame 7 along a first direction, and the mating assembly 2 is slidably connected to the support frame 7 along the first direction. The support frame 7 is a C-shaped structure, comprising a first plate surface 71 and a second plate surface 72 disposed opposite each other along the first direction, and a connecting plate surface 73 disposed between the first plate surface 71 and the second plate surface 72, wherein the connecting plate surface 73 is connected to the first plate surface 71 on one side along the first direction and to the second plate surface 72 on the other side. The mounting assembly 1 and the mating assembly 2 are slidably disposed on the connecting plate surface 73 of the support frame 7 along the first direction.

[0059] It should be noted that, in a possible embodiment of the present application, the first cylinder 5 and the second cylinder 6 may both be installed on the first plate surface 71 of the support frame 7 .

[0060] In order to facilitate the movement of the mating component 2 along the first direction, continue to refer to Figure 5 In this application, the gearbox detection device further includes a first linear guide rail 74 and a first stop block 75. The first linear guide rail 74 is provided on the connecting plate surface 73 along the first direction. The first stop block 75 is provided on the first linear guide rail 74 along the first direction. When the mating component 2 slides along the first linear guide rail 74 to the first stop block 75, it stops sliding. The first stop block 75 is used to prevent the mating component 2 from sliding out of the first linear guide rail 74. Figure 1 As shown, to accommodate gearboxes of various sizes, the mounting assembly 1 further includes a first slide 12. The mounting station 11 is mounted on the first slide 12. The first slide 12 is slidably connected to the support frame 7, and the first slide 12 moves along a first direction toward or away from the mating assembly 2. A first slider 121 is provided on the side of the first slide 12 proximate to the support frame 7 along the second direction, and the first linear guide 74 is plugged into the first slider 121. The first slide 12 is connected to the first slider 121, thereby enabling the first slide 12 to move along the first linear guide 74.

[0061] The first direction is perpendicular to the second direction. For the convenience of description, in the embodiment of the present application, the second direction may be defined as the X direction.

[0062] Continue to refer Figure 1 The gearbox detection equipment also includes a workbench assembly 8. Along the first direction, the workbench assembly 8 is arranged on a side of the installation assembly 1 away from the mating assembly 2.

[0063] In order to improve the automation level of gearbox detection equipment, in this application, reference is made to Figure 7 , Figure 7 The working table assembly 8 includes a third cylinder 81, and the third cylinder 81 includes a third cylinder push rod 82, such as Figure 1As shown, the third cylinder push rod 82 is connected to the first slide 12, and the third cylinder push rod 82 moves in the first direction. The first slide 12 includes a cylinder hanging plate 122, which is arranged opposite to the third cylinder push rod 82 along the first direction and is used to connect the third cylinder push rod 82.

[0064] Continue to refer Figure 7 In the present application, in order to facilitate the connection between the third cylinder push rod 82 and the first slide 12, the workbench assembly 8 also includes a third cylinder joint seat 83, and the third cylinder joint seat 83 is arranged on the side of the third cylinder push rod 82 close to the first slide 12, and the third cylinder joint seat 83 is connected to the third cylinder push rod 82 on one side along the first direction, and is connected to the cylinder hanging plate 122 of the first slide 12 on the other side.

[0065] Continue to refer Figure 7 The workbench assembly 8 further includes a mounting plate 84 and a positioning pin 85, wherein the positioning pin 85 is disposed on one side of the mounting plate 84 close to the mounting assembly 1 along the first direction; Figure 1 The installation station 11 shown in FIG includes positioning holes ( Figure 1 (not shown), and the positioning hole is arranged opposite the positioning pin 85 along the first direction. Thus, as the third cylinder 81 drives the installation station 11 to move in the Z direction toward the workbench assembly 8, the positioning pin 85 can be inserted into the positioning hole to achieve positioning between the installation station and the drive assembly 4. This helps to improve the accuracy of the fit between the output shaft of the gearbox to be tested and the loading assembly, as well as the fit between the input shaft and the drive assembly.

[0066] Continue to refer Figure 7 To prevent the gearbox from leaking oil and contaminating the working environment during testing, the workbench assembly 8 further includes a first oil seal 86, a first oil seal mounting seat 87, a second oil seal 88, a first oil seal mounting seat 87, and an oil receiving box 810. The oil receiving box 810 is disposed on a side of the mounting plate 84 close to the mounting assembly 1 along the first direction, and the first oil seal 86, the first oil seal mounting seat 87, the second oil seal 88, and the first oil seal mounting seat 87 are accommodated in the oil receiving box 810. The first oil seal 86 is used to sleeve the input shaft, and the second oil seal 88 is used to sleeve the output shaft. The first oil seal mounting seat 87 is used to mount the first oil seal 86 on the oil receiving box 810, and the second oil seal mounting seat 89 is used to mount the second oil seal 88 on the oil receiving box 810. The oil receiving box 810 includes a first through hole ( Figure 7 not shown) and the second through hole ( Figure 7 (not shown), the first through hole is arranged opposite to the first oil seal 86 along the first direction, and the second through hole is arranged opposite to the second oil seal 88 along the first direction.

[0067] refer to Figure 8 , Figure 8A schematic structural diagram of the first perspective of the installation assembly and the fourth cylinder provided in an embodiment of the present application. In order to facilitate the installation of the gearbox to be tested on the installation station 11, in the present application, the installation station 11 is slidably connected to the first slide 12, and the installation station 11 moves toward or away from the support frame 7 along the second direction; the first direction is perpendicular to the second direction. The installation station 11 includes a tooling plate 111 and a third slide 112, the third slide 112 includes a second linear guide 1121, the tooling plate 111 is arranged on the side of the third slide 112 close to the mating assembly along the first direction, and the second linear guide 1121 is arranged along the second direction; the first slide 12 includes a second slider 123, and the second linear guide 1121 is plugged into the second slider 123, thereby satisfying the purpose of moving the tooling plate 111 along the second linear guide 1121.

[0068] Continue to refer Figure 8 In the present application, the mounting assembly 1 further includes a second stopper 13, a calibration assembly 14, and a position-limiting block support 15. The second stopper 13 is disposed on one side of the third slide 112 along the third direction. The calibration assembly 14 is disposed on a side of the third slide 112 near the second stopper 13 along the third direction, and the calibration assembly 14 is disposed opposite the second stopper 13. The position-limiting block support 15 is disposed on a side of the second stopper 13 away from the position-limiting block support 15 along the second direction. The position-limiting block support 15 is fixedly connected to the first slide 12 and is used to limit the position of the second stopper 13. This improves the movement accuracy of the tooling plate 111 on the first slide 12 along the second direction.

[0069] The third direction is perpendicular to the first direction and the second direction. In the embodiment of the present application, the third direction can be defined as the Y direction.

[0070] refer to Figure 9 , Figure 9 This is a schematic diagram of the structure of the mounting assembly and the fourth cylinder from a second perspective provided in an embodiment of the present application. To improve the degree of automation of the gearbox detection device, in this application, the gearbox detection device further includes a fourth cylinder 9, which is mounted on the first slide 12; the fourth cylinder 9 also includes a fourth cylinder push rod ( Figure 9 (not shown in the figure), the fourth cylinder push rod is connected to the installation station 11, and the fourth cylinder push rod moves along the second direction.

[0071] In the present application, the fourth cylinder 9 further includes a fourth cylinder joint seat 91 , one end of the fourth cylinder joint seat 91 is connected to the tooling plate 111 along the second direction, and the other end is connected to the fourth cylinder push rod.

[0072] After a preliminary understanding of the specific structure of the gearbox detection equipment provided in this application, the gearbox detection equipment will be further explained in combination with actual working scenarios.

[0073] First, the fourth cylinder 9 drives the tooling plate 111 to move along the X direction to one end away from the support frame 7. A positioning hole is provided on the lower shell of the gearbox to be tested. After the gearbox to be tested is placed on the tooling plate 111, the positioning hole is inserted into the positioning pin 85 to position the gearbox to be tested on the tooling plate 111.

[0074] Next, the tooling plate 111 on which the gearbox to be tested is mounted is slid along the X direction toward the support frame 7 until the second blocking block 13 contacts the limiting block support 15 and stops moving.

[0075] Finally, the mating component 2 slides along the Z direction toward the tooling plate 111 until the mating component 2 is completely docked with the installation station 1, and then a driving force is applied to the input shaft through the driving component 3, and the gearbox to be tested begins to be tested.

[0076] Continue to refer Figure 9 In the present application, the mounting assembly 1 further includes a first oil collecting groove 16 and a second oil collecting groove 17. The first oil collecting groove 16 and the second oil collecting groove 17 are arranged along the first direction on one side of the tooling plate 111 close to the workbench assembly 8, and the first oil collecting groove 16 is arranged opposite to the input shaft, and the second oil collecting groove 17 is arranged opposite to the output shaft. The first oil collecting groove 16 and the second oil collecting groove 17 are used to guide the oil overflowing from the gearbox to be tested into the oil collecting box 810, which is beneficial to avoid irregular outward leakage of the oil overflowing from the gearbox during the test.

[0077] It should be noted that, in the present application, the shapes of the first oil receiving groove 16 and the second oil receiving groove 17 are not limited. For example, the shapes of the first oil receiving groove 16 and the second oil receiving groove 17 are funnel-shaped. The oil overflowing from the gearbox can flow into the oil receiving box 810 through the funnel-shaped oil receiving groove, thereby effectively reducing the random leakage of the gearbox oil.

[0078] refer to Figure 10 , Figure 10 Schematic diagram of the drive assembly provided in an embodiment of the present application. In this application, the drive assembly 3 includes a second servo motor 31, a second coupling 32, a second spindle mounting box 33, a second connecting shaft 34, and a torque calibration ring 35. The output end of the second servo motor 31 is sequentially connected to the second coupling 32, the second mechanical spindle, and the second connecting shaft 34. The axis of the second connecting shaft 34 is along a first direction, and the second connecting shaft 34 is used to connect to the transmission input shaft. A torque calibration ring 35 is provided at one end of the second connecting shaft 34, which is close to the transmission input shaft along the first direction. The torque calibration ring 35 is used to limit the output torque of the second servo motor 31.

[0079] Continue to refer Figure 10In this application, to control the output value of the second servo motor 31, the drive assembly 3 also includes a torque sensor 36, a torque limiter 37, and a second spindle mounting box 33. The second servo motor 31 is connected to the torque limiter 37. The second coupling 32, the second mechanical spindle, the torque limiter 37, and the torque sensor 36 are housed in the second spindle mounting box 33, making the device more compact. The second spindle mounting box 33 is fixedly connected to the mounting plate 84, which helps improve the stability of the drive assembly 3 during operation.

[0080] In the gearbox testing device provided herein, when the lower housing of the gearbox to be tested is installed at the installation station 11, the first centering sleeve 21 is positioned relative to the input shaft, the second centering sleeve 22 is positioned relative to the intermediate shaft, and the third centering sleeve 23 is positioned relative to the output shaft. This facilitates accurate connection of the first centering sleeve 21 with the input shaft, the second centering sleeve 22 with the intermediate shaft, and the third centering sleeve 23 with the output shaft after the first, second, and third centering sleeves 21, 22, and 23 are moved along the first direction to the installation station 11, thereby simulating the closed state of the gearbox to be tested, thereby ensuring that the gearbox to be tested meets the testing requirements under actual working conditions. This facilitates improving the accuracy of the gearbox testing device in testing the gearbox to be tested. In addition, in the present application, the drive assembly 3 is used to apply a driving force to the input shaft of the gearbox to be tested. Based on this, different driving force values ​​can be applied to the input shaft of the gearbox to be tested by the drive assembly 3 according to different testing requirements, which facilitates improving the versatility of the testing device in testing different models of gearboxes.

[0081] Since the gearbox testing equipment provided in this application is used to test the gearbox, if the gearbox test result fails, the unqualified parts in the gearbox can be replaced without unpacking the gearbox. Therefore, when reworking the unqualified gearbox, the risk of damage to the gearbox parts is reduced, which is beneficial to reducing production costs and improving production efficiency.

[0082] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations.

Claims

1. A gearbox detection device, the gearbox comprising an input shaft, a driving gear, an intermediate shaft, a first driven gear set, an output shaft, a second driven gear set and a lower housing, wherein the input shaft, the driving gear, the first driven gear set, the intermediate shaft, the output shaft and the second driven gear set are accommodated in the lower housing; the first driven gear set comprises a first driven gear and a second driven gear, the input shaft is inserted into the gear inner hole of the driving gear, the intermediate shaft is inserted into the gear inner holes of the first driven gear and the second driven gear, and the driving gear is meshed with the first driven gear; the second driven gear set comprises a third driven gear, the output shaft is inserted into the gear inner hole of the third driven gear; the second driven gear is meshed with the third driven gear; the axes of the input shaft, the intermediate shaft and the output shaft are parallel, characterized in that The gearbox detection device includes: a mounting assembly, a mating assembly and a driving assembly, wherein: The mounting assembly includes a mounting station, the mounting station including a first mounting hole, the mounting station is used to mount the lower housing, and the first mounting hole is used to be arranged opposite to the input shaft; the axis of the first mounting hole extends along a first direction; The mating assembly is arranged on one side of the mounting assembly along the first direction, and the mating assembly includes a first centering sleeve, a second centering sleeve, and a third centering sleeve, wherein the first centering sleeve is used to be coaxially arranged with the input shaft; the second centering sleeve is used to be coaxially arranged with the intermediate shaft; and the third centering sleeve is used to be coaxially arranged with the output shaft; the first centering sleeve, the second centering sleeve, and the third centering sleeve move toward or away from the mounting station along the first direction; The driving assembly is used to apply driving force to the input shaft.

2. The gearbox detection device according to claim 1, wherein the gearbox further comprises a first bearing inner ring and a second bearing inner ring, the end of the input shaft away from the lower housing is plugged into the first bearing inner ring, and the end of the intermediate shaft away from the lower housing is plugged into the second bearing inner ring, characterized in that: The mating assembly further includes a first bearing outer ring, a second bearing outer ring, and a differential core shaft, wherein the first bearing outer ring is accommodated in the first centering sleeve and is used to be sleeved on the outside of the first bearing inner ring; the second bearing outer ring is accommodated in the second centering sleeve and is used to be sleeved on the outside of the second bearing inner ring; The differential core shaft is accommodated in the third centering sleeve, and the differential core shaft is used to be connected to the output shaft.

3. The gearbox detection device according to claim 1, characterized in that: The mating assembly further includes a counterweight block, which is connected to the first centering sleeve. The counterweight block is located on the side of the first centering sleeve away from the mounting assembly along the first direction, and is used to apply a force along the first direction to the input shaft.

4. The gearbox detection device according to claim 1, characterized in that: The gearbox detection device further includes a first cylinder, the first cylinder being located on a side of the mating component away from the mounting component along the first direction, and the first cylinder being configured to apply a force along the first direction to the intermediate shaft; The first cylinder includes a first cylinder push rod, the first cylinder push rod is connected to the second centering sleeve, and the first cylinder push rod moves along a first direction.

5. The gearbox detection device according to claim 2, characterized in that: The gearbox detection device further includes a second cylinder, the second cylinder being located on a side of the mating component away from the mounting component along the first direction, and the second cylinder being used to apply a force along the first direction to the differential core shaft; The second cylinder includes a second cylinder push rod, the second cylinder push rod is connected to the third centering sleeve, and the second cylinder push rod moves along the first direction.

6. The gearbox detection device according to any one of claims 1 to 5, characterized in that: The gearbox detection device further includes a support frame, the mounting assembly and the mating assembly are arranged on the support frame along the first direction, and the mating assembly is slidably connected to the support frame along the first direction.

7. The gearbox detection device according to claim 6, characterized in that: The installation assembly further includes a first slide, the installation station is installed on the first slide, the first slide is slidably connected to the support frame, and the first slide moves toward or away from the mating assembly along the first direction.

8. The gearbox detection device according to claim 7, characterized in that: The gearbox detection equipment also includes a workbench assembly, which is arranged on a side of the mounting assembly away from the mating assembly along the first direction; the workbench assembly includes a third cylinder, the third cylinder includes a third cylinder push rod, the third cylinder push rod is connected to the first slide, and the third cylinder push rod moves along the first direction.

9. The gearbox detection device according to claim 8, characterized in that: The workbench assembly also includes a mounting plate and a positioning pin, wherein the positioning pin is arranged on a side of the mounting plate close to the mounting assembly along the first direction; the installation station includes a positioning hole, and the positioning hole is arranged opposite to the positioning pin along the first direction.

10. The gearbox detection device according to claim 7, characterized in that: The installation station is slidably connected to the first slide, and the installation station moves toward or away from the support frame along the second direction; the first direction is perpendicular to the second direction.

11. The gearbox detection device according to claim 10, characterized in that: The gearbox detection equipment further includes a fourth cylinder; the fourth cylinder further includes a fourth cylinder push rod, the fourth cylinder push rod is connected to the installation station, and the fourth cylinder push rod moves along the second direction.

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