Differential test device and method, electronic equipment, storage medium and vehicle

Abstract

The invention discloses a differential testing device and method, electronic equipment, a storage medium and a vehicle. The device comprises a loading motor which is used for outputting a loading torque; one end of the motor loading shaft is fixedly connected with the output end of the loading motor, and the motor loading shaft is used for transmitting loading torque; the loading side tool disc is connected with the other end of the motor loading shaft, and the interior of the loading side tool disc is of a polygonal structure; the fixed end tool disc is connected to the fixed end support, and a differential bearing supporting seat is arranged between the fixed end tool disc and the loading side tool disc; the differential mechanism is arranged on the differential mechanism bearing supporting seat, a gear ring part of a driven gear of the differential mechanism is of a polygonal structure, and the polygonal structure is used for enabling the gear ring part to be matched with the loading side tool disc. The technical problem that the loading torque cannot be effectively transmitted is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a differential test device, a method, an electronic device, a storage medium and a vehicle. Background Art

[0002] At present, as one of the important components in the vehicle transmission system, the reliability of the differential directly affects the service life of the transmission system. Therefore, it is necessary to conduct function, performance and durability tests on the differential to ensure the reliability of the differential.

[0003] In the related art, the reliability of the differential is verified by meshing loading of the gear pair. However, since the bending strength of the tooth root of the gear limits the loading torque, there is a problem that the loading torque cannot be effectively transmitted.

[0004] With respect to the above-mentioned problem of being unable to effectively transmit the loading torque, no effective solution has been proposed so far. Summary of the invention

[0005] The embodiments of the present invention provide a differential test device, method, electronic equipment, storage medium and vehicle to at least solve the technical problem that the loading torque cannot be effectively transmitted.

[0006] According to one aspect of an embodiment of the present invention, a test device for a differential is provided. The device may include: a loading motor for outputting a loading torque; a motor loading shaft, one end of which is fixedly connected to the output end of the loading motor for transmitting the loading torque; a loading side tooling disc, connected to the other end of the motor loading shaft, wherein the interior of the loading side tooling disc is a polygonal structure; a fixed end tooling disc, connected to the fixed end support, and a differential bearing support seat is arranged between the fixed end tooling disc and the loading side tooling disc; a differential, arranged on the differential bearing support seat, wherein the gear ring portion of the driven gear of the differential is a polygonal structure, and the polygonal structure is used to make the gear ring portion cooperate with the loading side tooling disc.

[0007] Optionally, the device further includes: a torque sensor connected to the other end of the motor loading shaft for monitoring the loading torque.

[0008] Optionally, the device further comprises: a motor support, which is mounted on the bottom plate of the platform and fixedly mounted with the loading motor.

[0009] Optionally, the differential further comprises: a straight-axis hole in the differential housing, connected to the fixed-end tooling disc via the straight-axis.

[0010] According to another aspect of an embodiment of the present invention, a test method for a differential is provided. The method may include: obtaining a loading torque output by a loading motor; controlling a loading shaft of the motor to transmit the loading torque to a loading side fixture disk, wherein the interior of the loading side fixture disk is a polygonal structure; controlling the loading side fixture disk to match the gear ring portion of a driven gear of the differential, wherein the gear ring portion is a polygonal structure; performing a static torsion test on the weld where the driven gear and the differential housing are connected after matching, and obtaining a test result, wherein the test result is used to characterize the weld quality at the weld.

[0011] Optionally, the method further comprises: monitoring the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize a change in the loading torque.

[0012] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0013] According to another aspect of an embodiment of the present invention, a test device for a differential is also provided. The device may include: an acquisition unit for acquiring the loading torque output by the loading motor; a transmission unit for controlling the motor loading shaft to transmit the loading torque to the loading side fixture disk, wherein the interior of the loading side fixture disk is a polygonal structure; a matching unit for controlling the loading side fixture disk to match the gear ring portion of the driven gear of the differential, wherein the gear ring portion is a polygonal structure; and a test unit for performing a static torsion test on the weld where the driven gear and the differential housing are connected after matching, and obtaining a test result, wherein the test result is used to characterize the weld quality at the weld.

[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method of the embodiment of the present invention.

[0015] According to another aspect of the embodiment of the present invention, a vehicle is provided, which is used to execute the method of the embodiment of the present invention.

[0016] According to another aspect of the embodiment of the present application, a computer program product is further provided. The computer program product may include a computer program, wherein the computer program is configured to execute any of the above methods when running.

[0017] According to another aspect of the embodiment of the present application, a computer program product is further provided. The computer program product may include a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and the computer program is configured to execute any of the above methods when executed.

[0018] According to another aspect of the embodiment of the present application, a computer program is further provided, wherein the computer program is configured to execute any one of the above methods when running.

[0019] In an embodiment of the present invention, a loading motor is used to output a loading torque; a motor loading shaft, one end of which is fixedly connected to the output end of the loading motor, is used to transmit the loading torque; a loading side tooling disk is connected to the other end of the motor loading shaft, wherein the interior of the loading side tooling disk is a polygonal structure; a fixed end tooling disk is connected to the fixed end support, and a differential bearing support seat is arranged between the fixed end tooling disk and the loading side tooling disk; a differential is arranged on the differential bearing support seat, wherein the gear ring portion of the driven gear of the differential is a polygonal structure, and the polygonal structure is used to make the gear ring portion cooperate with the loading side tooling disk. That is to say, the embodiment of the present invention uses a loading motor to control loading, and transmits the loading torque to the loading side tooling disk through the motor loading shaft. The loading side tooling disk is a polygonal structure, which cooperates with the main reducer driven gear. The ring gear part of the driven gear is cut into a polygonal structure identical to the loading side tooling disk. A larger plane is used to transmit torque, which greatly improves the torque transmission capacity, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welding differential, thereby achieving the technical effect of effectively transmitting the loading torque and solving the technical problem of being unable to effectively transmit the loading torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of a differential test device according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of another differential test device according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of another differential test device according to an embodiment of the present invention;

[0024] Figure 4 is a flow chart of a differential test method according to an embodiment of the present invention;

[0025] Figure 5is a schematic diagram of a differential static torque test device according to an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of another differential test device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1 Schematic diagram of a differential test device according to an embodiment of the present invention. Figure 1 As shown, the differential test device 100 may include: a loading motor 10 , a motor loading shaft 20 , a loading side tooling disc 30 , a fixed end tooling disc 40 and a differential 50 .

[0030] The loading motor 10 is used to output a loading torque.

[0031] Optionally, the loading motor can be a motor that simulates the vehicle's driving resistance and load, and can be installed in the vehicle's transmission system. The loading motor simulates the vehicle's driving conditions on real roads by controlling torque and speed, and can provide a variety of resistance and load conditions for performance testing and R&D work. The role of the loading motor is to evaluate the performance and efficiency of the vehicle by simulating different road conditions and load conditions. Through the loading motor test, the vehicle's power output, fuel consumption, emissions and other performance indicators at different speeds and loads can be determined.

[0032] One end of the motor loading shaft 20 is fixedly connected to the output end of the loading motor 10 for transmitting the loading torque.

[0033] Optionally, the motor loading shaft can be a device for transmitting power, which can be installed on the engine of the vehicle and drive the vehicle by driving other components in the transmission system. The function of the motor loading shaft is to transmit the power generated by the engine to the transmission system of the vehicle, thereby driving the vehicle forward. It has the task of rotating the engine and transmitting the torque generated by the engine to the transmission system, so that the vehicle can move.

[0034] The loading-side tooling disk 30 is connected to the other end of the motor loading shaft 20 , wherein the interior of the loading-side tooling disk 30 is a polygonal structure.

[0035] Optionally, the loading side tool tray can be a device for conveniently carrying tools and other items on the vehicle. It can be installed on the side of the vehicle and can be used to place tools, spare parts, ropes and other items, so that the driver can use them at any time when needed. The function of the loading side tool tray is to improve the loading capacity and convenience of the vehicle, allowing the driver to carry and use tools and other items more conveniently. This not only improves work efficiency, but also reduces the labor intensity of the driver, and improves the comfort and safety of work.

[0036] The fixed-end tooling plate 40 is connected to the fixed-end support, and a differential bearing support seat is arranged between the fixed-end tooling plate 40 and the loading-side tooling plate 30 .

[0037] Optionally, the fixed-end tooling plate can be a tooling device for fixing vehicle parts or components, which can be fixed at a specific position of the vehicle to support, fix or maintain the position of the parts. The function of the fixed-end tooling plate is to ensure the stability and safety of vehicle parts and prevent them from loosening or falling off during the driving of the vehicle. It can help ensure that the vehicle parts are in the correct position and can withstand the vibration and impact generated when the vehicle is driving, thereby ensuring the normal operation and safety of the vehicle.

[0038] The differential 50 is arranged on the differential bearing support seat, wherein the gear ring portion of the driven gear of the differential is a polygonal structure, and the polygonal structure is used to make the gear ring portion cooperate with the loading side tooling disc.

[0039] Optionally, the differential may be a welding differential, but is not limited to a welding differential. The driven gear of the differential may be a master-minus driven gear.

[0040] Optionally, the output end of the loading motor 10 is fixedly connected to the motor loading shaft 20. The other end of the motor loading shaft 20 is fixedly connected to the loading side fixture disk 30. A differential bearing support seat is provided in the loading side fixture disk 30 and the fixed fixture disk 40. A differential 50 is placed on the support seat. The interior of the loading side fixture disk 30 is a special polygonal structure, which cooperates with the main reduction driven gear on the differential 50. The driven gear ring part is cut into the same polygonal structure as the loading side fixture disk 30 to achieve torque transmission between larger planes.

[0041] In the embodiment of the present invention, the loading motor 10 is used to output the loading torque; the motor loading shaft 20 has one end fixedly connected to the output end of the loading motor 10 for transmitting the loading torque; the loading side tooling disk 30 is connected to the other end of the motor loading shaft 20, wherein the interior of the loading side tooling disk 30 is a polygonal structure; the fixed end tooling disk 40 is connected to the fixed end support, and a differential bearing support seat is arranged between the fixed end tooling disk 40 and the loading side tooling disk 30; the differential 50 is arranged on the differential bearing support seat, wherein the gear ring portion of the driven gear of the differential is a polygonal structure, and the polygonal structure is used to make the gear ring portion cooperate with the loading side tooling disk. That is to say, the embodiment of the present invention uses a loading motor to control loading, and transmits the loading torque to the loading side tooling disk through the motor loading shaft. The loading side tooling disk is a polygonal structure, which cooperates with the main reducer driven gear. The ring gear part of the driven gear is cut into a polygonal structure identical to the loading side tooling disk. A larger plane is used to transmit torque, which greatly improves the torque transmission capacity, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welding differential, thereby achieving the technical effect of effectively transmitting the loading torque and solving the technical problem of being unable to effectively transmit the loading torque.

[0042] The test device for the differential of this embodiment is further introduced below.

[0043] As an optional embodiment, the device also includes: a torque sensor connected to the other end of the motor loading shaft for monitoring the loading torque.

[0044] Figure 2 Schematic diagram of another differential test device according to an embodiment of the present invention. Figure 2 As shown, the differential test device 100 may further include a torque sensor 60. The torque sensor 60 is connected to the other end of the motor loading shaft 20 and is used to monitor the loading torque.

[0045] Optionally, a torque sensor 60 is fixed on the motor loading shaft 20 for real-time monitoring of the loading torque.

[0046] As an optional embodiment, the device also includes: a motor support, which is installed on the bottom plate of the platform and fixedly installed with the loading motor.

[0047] Figure 3 Schematic diagram of another differential test device according to an embodiment of the present invention. Figure 3 As shown, the differential test device 100 may further include: a motor support 70. The motor support 70 is mounted on the bottom plate of the test bench and fixedly mounted with the loading motor 10.

[0048] Optionally, a motor support 70 is installed on the bottom plate of the platform, and the motor support 70 and the loading motor 10 are fixedly installed.

[0049] As an optional embodiment, the differential further includes: a straight-axis hole in the differential housing, which is connected to the fixed-end tooling disc via the straight-axis.

[0050] Optionally, the straight-axle hole in the differential housing of the differential 50 is connected to the fixed-end tooling disk 40 via a special straight-axle, the fixed-end tooling disk 40 is connected to the fixed-end support, and the fixed-end support and the test bench base are fixed by bolts, so that the special straight-axle and the differential housing are stationary relative to the test bench base during loading, thereby achieving the purpose of testing the ultimate load-bearing torque of the weld.

[0051] Optionally, the planetary gear shaft hole of the differential housing is connected to the fixed-end tooling disc through a special shaft, and the fixed-end tooling disc is connected to the fixed-end support.

[0052] This embodiment transmits torque between the loading device and the differential main reduction driven gear through a polygonal structure, uses a larger plane to transmit torque, greatly improves the torque transmission capacity, solves the problem of limited torque transmission in gear meshing, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welded differential.

[0053] According to an embodiment of the present invention, an embodiment of a differential test method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0054] Figure 4 : is a flow chart of a differential test method according to an embodiment of the present invention. Figure 4 As shown, the method may include the following steps:

[0055] Step S402, obtaining the loading torque output by the loading motor.

[0056] In the technical solution provided in the above step S402 of the present invention, the loading torque output by the loading motor can be obtained. Optionally, a motor support is installed on the bottom plate of the platform, and the motor support is fixedly installed with the loading motor.

[0057] Step S404, controlling the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure.

[0058] In the technical solution provided in the above step S404 of the present invention, after obtaining the loading torque output by the loading motor, the motor loading shaft can be controlled to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure.

[0059] Optionally, since the output end of the loading motor is fixedly connected to the motor loading shaft, after obtaining the loading torque output by the loading motor, the motor loading shaft can be controlled to transmit the loading torque to the loading-side tooling disk.

[0060] Step S406, controlling the loading side tooling plate to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is a polygonal structure.

[0061] In the technical solution provided in the above step S406 of the present invention, after controlling the motor loading shaft to transmit the loading torque to the loading side fixture disk, the loading side fixture disk can be controlled to cooperate with the gear ring of the driven gear of the differential, wherein the gear ring is a polygonal structure.

[0062] Optionally, the differential may be a welding differential, but is not limited to a welding differential. The driven gear of the differential may be a master-minus driven gear.

[0063] Optionally, the fixed-end tooling disc is connected to the fixed-end support, and a differential bearing support seat is provided between the loading-side tooling disc and the fixed tooling disc, and the differential is placed on the support seat. The interior of the loading-side tooling disc is a special polygonal structure, which cooperates with the main reduction driven gear on the differential, and the driven gear ring part is cut into the same polygonal structure as the loading-side tooling disc to realize torque transmission between larger planes.

[0064] Step S408, performing a static torsion test on the weld where the driven gear and the differential housing are connected after being matched, and obtaining a test result, wherein the test result is used to characterize the weld quality at the weld.

[0065] In the technical solution provided in the above step S408 of the present invention, after the loading side fixture plate is controlled to match the gear ring of the driven gear of the differential, a static torsion test can be performed on the weld where the driven gear and the differential housing are connected after matching to obtain the test result. The test result is used to characterize the weld quality at the weld.

[0066] Optionally, this embodiment transmits torque between the loading device and the differential main reduction driven gear through a polygonal structure, uses a larger plane to transmit torque, greatly improves the torque transmission capacity, solves the problem of limited torque transmission in gear meshing, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welded differential.

[0067] In the above steps S402 to S408 of the present invention, the loading torque output by the loading motor is obtained; the loading shaft of the motor is controlled to transfer the loading torque to the loading side fixture disk, wherein the interior of the loading side fixture disk is a polygonal structure; the loading side fixture disk is controlled to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is a polygonal structure; a static torsion test is performed on the weld where the driven gear and the differential housing are connected after the cooperation, and the test result is obtained, wherein the test result is used to characterize the weld quality at the weld. That is to say, the embodiment of the present invention uses a loading motor to control the loading, and transfers the loading torque to the loading side fixture disk through the motor loading shaft, the loading side fixture disk is a polygonal structure, and cooperates with the main reduction driven gear, the ring gear portion of the driven gear is cut into the same polygonal structure as the loading side fixture disk, and a larger plane is used to transfer the torque, which greatly improves the torque transmission capacity, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welding differential, thereby achieving the technical effect of effectively transmitting the loading torque and solving the technical problem of being unable to effectively transmit the loading torque.

[0068] The above method of this embodiment is further introduced below.

[0069] As an optional embodiment, the method further includes: monitoring the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize changes in the loading torque.

[0070] In this embodiment, the loading torque can be monitored by a torque sensor to obtain a monitoring result, wherein the monitoring result can be used to characterize the change of the loading torque. Optionally, a torque sensor is fixed on the motor loading shaft to monitor the loading torque in real time.

[0071] As an optional embodiment, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0072] In this embodiment, the differential case and the straight shaft are in a relatively static state, wherein the straight shaft hole of the differential case is connected to the fixed end tooling disc through the straight shaft, the fixed end tooling disc is connected to the fixed end support, and the fixed end support is fixedly connected to the stand bottom plate.

[0073] Optionally, the differential housing of the differential is connected to the fixed-end tooling disk through a special straight-shaft in the straight-shaft hole, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support and the test bench base are fixed by bolts, so that the special straight-shaft and the differential housing are stationary relative to the test bench base during loading, thereby achieving the purpose of assessing the ultimate load-bearing torque of the weld.

[0074] Optionally, the planetary gear shaft hole of the differential housing is connected to the fixed-end tooling disc through a special shaft, and the fixed-end tooling disc is connected to the fixed-end support.

[0075] This embodiment uses a loading motor to control loading, and transmits the loading torque to the loading side tooling disc through the motor loading shaft. The loading side tooling disc is a polygonal structure, which cooperates with the main reducer driven gear. The gear ring part of the driven gear is cut into a polygonal structure identical to the loading side tooling disc. A larger plane is used to transmit torque, which greatly improves the torque transmission capacity, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welding differential, thereby achieving the technical effect of effectively transmitting the loading torque and solving the technical problem of being unable to effectively transmit the loading torque.

[0076] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0077] The differential is one of the important components in the vehicle transmission system. The differential can achieve a speed difference between the left and right wheels of the vehicle when turning, and run smoothly. The traditional differential structure is mainly assembled by the differential housing, the main reducer driven gear, the planetary gear, the half-shaft gear, the planetary gear shaft, the gasket and the bearing. At present, most of the connection methods between the differential housing and the main reducer driven gear are bolted or riveted. These two traditional connection methods require the processing of connection holes on the spokes of the differential housing and the main reducer driven gear. The number of bolts and rivets for connection is usually 10-16, which increases the weight of the assembly and the processing and manufacturing cost is relatively high. With the development of industrial technology, the welded differential begins to show its advantages. Compared with the traditional differential connection method, the welded differential can directly connect the differential housing and the main reducer driven gear by fusion welding, eliminating the processing and manufacturing costs of punching and the overlapping parts of the structure. It has a high degree of lightweight and is more suitable for the development trend of the industry.

[0078] As an important part of the transmission system, the reliability of the differential directly affects the service life of the transmission system. Therefore, it is necessary to conduct functional, performance, and durability tests on the reducer, transmission, and its internal differential to ensure its reliability. As for the use conditions of the differential, the differential housing and the main reducer driven gear rotate around the axis during operation. When braking or subjected to external impact, the connection position will bear a large load, so the static torsion test of the connection structure is crucial. The traditional bolt-on differential single static torsion strength assessment can be achieved by transferring the loading from the secondary driving gear of the main reducer to the secondary driven gear of the differential, but the loading torque limit will be limited by the strength of the gear pair, usually able to withstand 2-2.5Tmax, Tmax can be used to represent the single maximum torque of the assessment. In driving conditions, you may encounter a large impact, such as crossing the track, shell road surface, etc. At this time, the instantaneous maximum torque will exceed 3Tmax, or even higher. This common loading method limits the assessment of the maximum capacity of the connection strength between the differential housing, bevel gears, planetary gear shafts, and the differential housing and the main reducer driven gear.

[0079] In the related art, a static torque test device for a screw-on differential is provided, which can use a single differential for testing, saving the cost of the whole box test, but it is still limited to the use of a transmission shaft system test, and the maximum torque carried is limited by the gear meshing strength. In addition, although the existing test device can connect the loading device through the bolt connection hole to solve the problem that the test torque does not meet the requirements, the bolt connection hole is easily crushed and fails under large torque, and this method is not suitable for welded differentials without connection holes on the spokes, and there are still certain limitations.

[0080] As an optional example, an automatic transmission differential static torque test device is proposed to solve the problem that the existing static torque test bench can only perform static torque test on the MT whole machine, but cannot perform static torque test on the differential alone, and the maximum input torque of the test bench cannot meet the test requirements. In the device, the output end of the test bench output motor is connected to the gear shaft through the pad, the gear shaft support seat is installed on the test bench bottom plate, and the two ends of the differential are installed on the test bench bottom plate through the differential left support seat and the differential right support seat. The distal ends of the first transmission shaft and the second transmission shaft are fixed, and the proximal ends are connected to the differential key through the differential support seat. The transmission shaft fixing seat is installed on the test bench bottom plate, and the main reducer driven gear is fixedly mounted on the differential, and the main reducer driven gear is meshed with the gear shaft. The device can be used in the static torque test of the automatic transmission differential, but there is still the problem of being unable to effectively transmit the loading torque.

[0081] As another optional example, a differential case and planetary gear shaft strength testing fixture and method are also proposed, the differential case and planetary gear shaft strength testing fixture comprising a torque loading device, the differential case is fixedly mounted on the torque loading device, a gear fixing device with planetary gears fixed thereon is provided in the differential case, a gear shaft passes through the planetary gears and the gear fixing device, and is fixed in the differential case by a gear shaft pin, the gear fixing device extends out of the differential case at both ends and is supported on a fixed bracket, the tapered bearings at both ends of the differential case are respectively supported on a bearing bracket, but there is still a problem of being unable to effectively transmit the loading torque.

[0082] As another optional example, a differential static torsional strength testing device is also proposed, which includes an operating platform, two clamping devices are arranged above the operating platform at intervals, and clamping bases fixedly connected to the corresponding clamping devices are respectively fixedly connected on the top surface of the operating platform. A static torsional sleeve is arranged above the operating platform and between the two clamping devices. The static torsional sleeve has an inner hole extending in the relative directions of the two clamping devices, and a plurality of static torsional connecting blocks are fixedly connected at intervals on the side surface of one side of the static torsional sleeve around the center line direction of the inner hole of the static torsional sleeve. The static torsional connecting block is provided with connecting holes extending in a direction parallel to the center line direction of the inner hole of the static torsional sleeve, and all the connecting holes are evenly spaced around the center line direction of the inner hole of the static torsional sleeve. The diameter of the connecting hole is consistent with the diameter of the pin shaft on the differential to be tested and is used to be sleeved on the pin shaft of the differential to be tested. A static torsional driving device capable of driving the static torsional sleeve to rotate around the center line direction of the inner hole of the static torsional sleeve is installed on the top surface of the operating platform. However, there is still a problem of inability to effectively transmit the loading torque.

[0083] To solve the above problems, this embodiment proposes a differential single static torsion test fixture and test sample detection method, which will take the welded differential as an example, but is not limited to the welded differential. Use a motor to control loading, and transmit the torque to the loading side fixture disk through the loading shaft. The loading side fixture disk is a polygonal structure, which cooperates with the main reduction driven gear. The gear ring part is cut into the same polygonal structure as the loading side fixture disk. The planetary gear shaft hole of the differential housing is connected to the fixed end fixture disk through a special shaft, and the fixed end fixture disk is connected to the fixed end support.

[0084] For welded differentials, the quality of the weld directly affects the reliability of the differential assembly, so it is essential to check the torque strength of the weld. However, since welded differentials are usually compact and miniaturized, the design takes into account the impact on structural strength and stiffness. The connection holes on the spokes of the main reducer and driven gears should not be too large, so the commonly used connection hole loading is not applicable. Loading through the meshing of the gear pair will load the torque due to the limit of the gear root bending strength, and it is impossible to better evaluate the quality of the welding process. The device uses a polygonal structure for loading, which greatly increases the torque that the main reducer and driven gears can bear, solving the problem that the loading torque is limited by the tooth root bending strength and the welding structure is not easy to load.

[0085] Figure 5 Schematic diagram of a differential static torque test device according to an embodiment of the present invention. Figure 5 As shown, the schematic diagram of the differential static torque test device may at least include: a bench bottom plate 501, a motor support 502, a loading motor 503, a motor loading shaft 504, a torque sensor 505, a loading side tooling plate 506, a differential 507, a special straight shaft 508, a fixed end tooling plate 509, and a fixed end support 510. In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0086] A motor support 502 is installed on the bench bottom plate 501. The motor support 502 is fixedly installed with the loading motor 503. The output end of the loading motor 503 is fixedly connected to the motor loading shaft 504. A torque sensor 505 is fixed on the loading shaft 504 to monitor the loading torque in real time. The other end of the motor loading shaft 504 is fixedly connected to the loading side tooling disk 506. A differential bearing support seat is provided in the loading side tooling disk 506 and the fixed tooling disk 509. A differential 507 is placed on the support seat. The interior of the loading side tooling disk 506 is a special polygonal structure, which cooperates with the main reduction driven gear on the differential 507. The driven gear ring part is cut into the same polygonal structure as the loading side tooling disk 506 to achieve torque transmission between larger planes. The straight-axle hole in the differential housing of the differential 507 is connected to the fixed-end tooling plate 509 via a special straight-axle 508, and the fixed-end tooling plate 509 is connected to the fixed-end support 510. The fixed-end support 510 and the test bench base plate 501 are fixed by bolts, so that the special straight-axle 508 and the differential housing are stationary relative to the test bench base 501 during the loading process, thereby achieving the purpose of assessing the ultimate load-bearing torque of the weld.

[0087] This embodiment transmits torque between the loading device and the differential main reduction driven gear through a polygonal structure, uses a larger plane to transmit torque, greatly improves the torque transmission capacity, solves the problem of limited torque transmission in gear meshing, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welded differential.

[0088] This embodiment can effectively verify the weld strength of the welded differential under extreme working conditions, and provide an effective verification method for evaluating the quality of the welding process. Furthermore, this embodiment will also provide a detection method for effectively verifying whether the weld is cracked after the test. Although it can be seen from the test loading curve whether there is a loading abnormality, the test bench has limited sensitivity to cracks and microcracks, and only the weld surface can be observed after welding, and the internal situation of the weld cannot be observed. Therefore, it is necessary to detect the weld by non-destructive testing. Usually, a special ultrasonic flaw detector is used to detect the weld. Ultrasonic testing is one of the commonly used non-destructive testing methods in industry. The principle is that when ultrasonic waves enter the interior of a part and encounter defects, a part of the sound wave will be reflected. After the transmitter and receiver analyze the reflected wave, the defects can be accurately detected, and the location and size of the internal defects can be identified.

[0089] This embodiment uses a loading motor to control loading, and transmits the loading torque to the loading side tooling disc through the motor loading shaft. The loading side tooling disc is a polygonal structure, which cooperates with the main reducer driven gear. The gear ring part of the driven gear is cut into a polygonal structure identical to the loading side tooling disc. A larger plane is used to transmit torque, which greatly improves the torque transmission capacity, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welding differential, thereby achieving the technical effect of effectively transmitting the loading torque and solving the technical problem of being unable to effectively transmit the loading torque.

[0090] According to an embodiment of the present invention, a differential test device is also provided. It should be noted that the differential test device can be used to execute a differential test method.

[0091] Figure 6 Schematic diagram of another differential test device according to an embodiment of the present invention. Figure 6 As shown, the differential test device 600 may include: an acquisition unit 602 , a transmission unit 604 , a matching unit 606 and a test unit 608 .

[0092] The acquisition unit 602 is used to acquire the loading torque output by the loading motor.

[0093] The transmission unit 604 is used to control the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure.

[0094] The matching unit 606 is used to control the matching between the loading side tooling plate and the gear ring portion of the driven gear of the differential, wherein the gear ring portion is a polygonal structure.

[0095] The test unit 608 is used to perform a static torsion test on the weld where the driven gear and the differential housing are connected after being matched, and obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

[0096] Optionally, the device further comprises: a monitoring unit, configured to monitor the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize a change in the loading torque.

[0097] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0098] In the embodiment of the present invention, the loading torque output by the loading motor is obtained by the acquisition unit 602. The loading torque is transmitted to the loading side fixture disk by controlling the motor loading shaft through the transmission unit 604, wherein the interior of the loading side fixture disk is a polygonal structure. The loading side fixture disk is controlled to cooperate with the ring gear part of the driven gear of the differential by the matching unit 606, wherein the ring gear part is a polygonal structure. The static torsion test is performed on the weld where the matched driven gear is connected to the differential housing by the test unit 608 to obtain the test result, wherein the test result is used to characterize the weld quality at the weld. That is to say, the embodiment of the present invention uses the loading motor to control the loading, and transmits the loading torque to the loading side fixture disk through the motor loading shaft, the loading side fixture disk is a polygonal structure, and cooperates with the main reduction driven gear, and the ring gear part of the driven gear is cut into the same polygonal structure as the loading side fixture disk, and uses a larger plane to transmit torque, greatly improves the torque transmission capacity, can fully verify the weld strength, evaluate the welding process quality, and improve the reliability of the welded differential, thereby achieving the technical effect of effectively transmitting the loading torque and solving the technical problem of being unable to effectively transmit the loading torque.

[0099] According to an embodiment of the present invention, a computer-readable storage medium is further provided, the storage medium comprising a stored program, wherein the program executes the above method.

[0100] Optionally, the storage medium is used to obtain the loading torque output by the loading motor; control the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; control the loading side tooling disk to cooperate with the ring gear part of the driven gear of the differential, wherein the ring gear part is a polygonal structure; perform a static torsion test on the weld where the driven gear and the differential housing are connected after cooperation to obtain the test results, wherein the test results are used to characterize the weld quality at the weld.

[0101] Optionally, the storage medium is used to monitor the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize changes in the loading torque.

[0102] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0103] According to an embodiment of the present invention, a vehicle is also provided, and the vehicle is used to execute any one of the above methods.

[0104] Optionally, the vehicle is used to obtain the loading torque output by the loading motor; control the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; control the loading side tooling disk to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is a polygonal structure; perform a static torsion test on the weld where the driven gear and the differential housing are connected after cooperation, and obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

[0105] Optionally, the vehicle is used to monitor the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize changes in the loading torque.

[0106] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0107] According to an embodiment of the present invention, a computer program product is further provided. The computer program product may include a computer program, wherein the computer program is configured to execute any one of the above methods when running.

[0108] Optionally, the computer program product is used to obtain the loading torque output by the loading motor; control the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; control the loading side tooling disk to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is a polygonal structure; perform a static torsion test on the weld where the driven gear and the differential housing are connected after cooperation to obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

[0109] Optionally, the computer program product is used to monitor the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize changes in the loading torque.

[0110] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0111] According to another aspect of the embodiment of the present application, a computer program product is further provided. The computer program product may include a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and the computer program is configured to execute any one of the above methods when executed.

[0112] Optionally, the computer program product is used to obtain the loading torque output by the loading motor; control the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; control the loading side tooling disk to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is a polygonal structure; perform a static torsion test on the weld where the driven gear and the differential housing are connected after cooperation to obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

[0113] Optionally, the computer program product is used to monitor the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize changes in the loading torque.

[0114] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0115] According to another aspect of the embodiment of the present application, a computer program is further provided, wherein the computer program is configured to execute any one of the above methods when running.

[0116] Optionally, the computer program is used to obtain the loading torque output by the loading motor; control the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; control the loading side tooling disk to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is a polygonal structure; perform a static torsion test on the weld where the driven gear and the differential housing are connected after cooperation to obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

[0117] Optionally, the computer program is used to monitor the loading torque using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize changes in the loading torque.

[0118] Optionally, the differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

[0119] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0120] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0122] The units determined as separate components may or may not be physically separated, and the components determined as unit displays may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0123] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0124] If the integrated unit is implemented in the form of a software functional unit and determined to be sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.

[0125] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A differential test device, characterized in that: include: A loading motor, used for outputting a loading torque; A motor loading shaft, one end of which is fixedly connected to the output end of the loading motor and is used to transmit the loading torque; A loading side tooling disk connected to the other end of the motor loading shaft, wherein the interior of the loading side tooling disk is a polygonal structure; A fixed-end tooling disc is connected to the fixed-end support, and a differential bearing support seat is arranged between the fixed-end tooling disc and the loading-side tooling disc; The differential is arranged on the differential bearing support seat, wherein the gear ring portion of the driven gear of the differential is the polygonal structure, and the polygonal structure is used to make the gear ring portion cooperate with the loading side tooling disc.

2. The device according to claim 1, characterized in that The device also includes: A torque sensor is connected to the other end of the motor loading shaft and is used to monitor the loading torque.

3. The device according to claim 1, characterized in that The device also includes: The motor support is installed on the bottom plate of the bench and fixedly installed with the loading motor.

4. The device according to claim 1, characterized in that The differential also includes: The straight-axis hole of the differential housing is connected to the fixed-end tooling disc through the straight-axis.

5. A differential test method, characterized in that: include: Obtain the loading torque output by the loading motor; Controlling the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; Controlling the loading side tooling plate to cooperate with the ring gear portion of the driven gear of the differential, wherein the ring gear portion is the polygonal structure; A static torsion test is performed on the weld where the driven gear and the differential housing are connected after being matched to obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

6. The method according to claim 5, characterized in that The method further comprises: The loading torque is monitored by using a torque sensor to obtain a monitoring result, wherein the monitoring result is used to characterize a change in the loading torque.

7. The method according to claim 5, characterized in that The differential case and the straight-axle are in a relatively static state, wherein the straight-axle hole of the differential case is connected to the fixed-end tooling disk through the straight-axle, the fixed-end tooling disk is connected to the fixed-end support, and the fixed-end support is fixedly connected to the stand bottom plate.

8. A differential test device, characterized in that: include: An acquisition unit, used for acquiring a loading torque output by a loading motor; A transmission unit, used for controlling the motor loading shaft to transmit the loading torque to the loading side tooling disk, wherein the interior of the loading side tooling disk is a polygonal structure; A matching unit, used for controlling the matching between the loading side tooling plate and the gear ring portion of the driven gear of the differential, wherein the gear ring portion is the polygonal structure; The test unit is used to perform a static torsion test on the weld where the driven gear and the differential housing are connected after being matched, and obtain a test result, wherein the test result is used to characterize the weld quality at the weld.

9. An electronic device, characterized in that: include: A memory storing an executable program; A processor, configured to run the program, wherein the program executes the method according to any one of claims 5 to 7 when running.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the device where the storage medium is located is controlled to execute the method according to any one of claims 5 to 7.

11. A computer program product, characterized in that The computer program product comprises a computer program, wherein the computer program is configured to perform the method according to any one of claims 5 to 7 when executed by a processor.

12. A vehicle, characterized in that: Used to perform the method according to any one of claims 5 to 7.

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