CN105372032A - Device, system and method of vibration performance integration testing of transmission shaft and rear axle assembly - Google Patents
Device, system and method of vibration performance integration testing of transmission shaft and rear axle assembly Download PDFInfo
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- CN105372032A CN105372032A CN201510855895.1A CN201510855895A CN105372032A CN 105372032 A CN105372032 A CN 105372032A CN 201510855895 A CN201510855895 A CN 201510855895A CN 105372032 A CN105372032 A CN 105372032A
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Abstract
The present invention provides a device, system and method of vibration performance integration testing of a transmission shaft and a rear axle assembly, belonging to the field of the transmission shaft and rear axle test. The device of vibration performance integration testing of the transmission shaft and the rear axle assembly comprises a test board, and a driving device, an energy storage device, a reduction gear and a load applying-inversed device fixed on the test board. The driving device is connected with the transmission shaft to be tested; two ends of the rear axle of the rear axle assembly to be tested are connected with the energy storage device, the reduction gear and the load applying-inversed device in turn in the energy transmission direction; and the energy storage device, the reduction gear and the load applying-inversed device are symmetrically arranged by taking the rear axle as a central axis. The device of vibration performance integration testing of the transmission shaft and the rear axle assembly also comprises a plurality of torque sensors arranged at the periphery of the transmission shaft to be tested and the rear axle assembly to be tested. The device of vibration performance integration testing of a transmission shaft and a rear axle assembly is able to perform simulation of a full vehicle, and is not simply simulation of applying load to the transmission shaft or a main reducing gear, therefore the test result is more accurate and reliable, and the applicability is higher.
Description
Technical field
The present invention relates to a kind of transmission shaft and back axle proving installation, particularly relate to a kind of transmission shaft and rear axle assy vibration performance comprehensive test device, system and method.
Background technology
The Noise and Vibration Control of truck drive shaft and rear axle assy, one of emphasis index that Shi Ge automobile production producer pays close attention to also is the emphasis index that client pays close attention to.And current each automobile production manufacturer is all by when carrying out towing ahead zero load running adaptation to the detection mode of vehicle rear axle assembly vibration noise, ear with operating personnel sounds judging, to to exceed standard or underproof product is reprocessed, qualified enters next process.The unloaded running adaptation of the towing ahead carried out at present is only from speed reduction unit main drive gear flange input power by main driving mechanism, rear axle assy is driven to carry out running adaptation, due to the impact by artificial and background noise, test result can not reflect the noise situations of vehicle rear axle assembly really, add and be assembled to the load after on car with rear axle assy and transmission situation is also different, can not the duty of simulated automotive under various operating mode, the vibration noise of vehicle rear axle assembly can not be reflected really.
Summary of the invention
For solving the problems of the prior art, the invention provides transmission shaft and rear axle assy vibration performance comprehensive test device, and based on the test macro of this proving installation and method.
Transmission shaft of the present invention and rear axle assy vibration performance comprehensive test device comprise test board, be fixed on the drive unit on test board, energy storage device, reduction gear and anti-imposed load device, described drive unit is connected with transmission shaft to be measured, the back axle two ends of rear axle assy to be measured connect energy storage device successively according to energy transferring direction, reduction gear and anti-imposed load device, described energy storage device, reduction gear and anti-imposed load device rotational symmetry centered by back axle is arranged, described transmission shaft and rear axle assy vibration performance comprehensive test device also comprise multiple torque sensor, be arranged on around transmission shaft to be measured and rear axle assy.
The present invention is further improved, and described test board entirety is T-shaped.
The present invention is further improved, and described torque sensor is four, is separately positioned between drive unit and transmission shaft to be measured, between transmission shaft to be measured and rear axle assy main reducing gear to be measured, between rear axle assy to be measured and energy storage device.
The present invention is further improved, and described torque sensor, transmission shaft to be measured and rear axle assy and reduction gear are fixed on test board by respective supporting base.
The present invention is further improved, described supporting base comprises the fixed support portion be fixedly connected with test board and the clamping section, location be fixed all parts, the supporting base of described rear axle assy to be measured is also included between fixed support portion and clamping section, location and is provided with the elevating mechanism controlling clamping section, described location and be elevated, and ensures the axle center height of each several part in one plane.
The present invention is further improved, and described energy storage device is fixed on test board by bearing, bearing seat and energy storage device bracing frame, serves as power counter dragging in running adaptation, the operating mode of simulated automotive free-wheel.
The present invention is further improved, and between described rear axle assy to be measured and energy storage device, between described energy storage device and reduction gear, adopts resilient key shaft coupling to be connected between described reduction gear with anti-imposed load device.Compensate due to the secondary vibration that two coupling spindles are not identical, have error to cause; Extend the bearing life of energy storage device.
Present invention also offers one and comprise above-mentioned transmission shaft and rear axle assy vibration performance comprehensive test device, also comprise acceleration transducer, first signal amplifying apparatus, secondary signal multiplying arrangement, data collector, with the industrial computer of display, PLC, frequency converter, chromacoder, driver, described acceleration transducer is arranged on around transmission shaft to be measured and rear axle assy, described torque sensor is connected with data collector by the first signal amplifying apparatus, described acceleration transducer is connected with data collector by secondary signal multiplying arrangement, described industrial computer is connected with PLC with data collector respectively, described drive unit is connected with described PLC by frequency converter, described PLC is connected with driver by described chromacoder, described driver is connected with described anti-imposed load device.
The present invention is further improved, described vibration transducer is 8, be separately positioned between drive unit and transmission shaft to be measured, between transmission shaft to be measured and rear axle assy main reducing gear to be measured, between rear axle assy to be measured and energy storage device, transmission shaft intermediate supports place to be measured, on rear axle assy main reducing gear to be measured and on rear axle assy to be measured two axle shaft housings.
Present invention also offers a kind of method of testing, comprise the following steps: S1: transmission shaft to be measured and rear axle assy are installed on transmission shaft and rear axle assy vibration performance comprehensive test device, arrange acceleration transducer; S2: working condition measurement condition is set: PLC is rotated by Frequency Converter Control drive unit, and drive anti-imposed load device by chromacoder control and drive system, simulate the various operating modes after rear axle assy to be measured loading car load; S3: torque sensor detects moment of torsion and tach signal, and is transferred to data collector by the first signal amplifying apparatus; Acceleration transducer detects vibration acceleration signal, and is transferred to data collector by secondary signal multiplying arrangement; S4: the signal of collection is sent to industrial computer by described data collector; S5: industrial computer receives the signal of data collector, carries out Digital Signal Analysis and Processing, draws test result; S6: judge decision-making according to test result.
Compared with prior art, the invention has the beneficial effects as follows: apply power to transmission shaft to be measured by drive unit, then giving back axle, is simulate car load, be not single simulating transmission shaft or main reducing gear imposed load, test result more accurately and reliably; Can simulation no-load running-in, load running-in, rotate forward reversion and run; Utilize energy storage device to simulate the duty of micro-car back axle under coasting mode, applicability is stronger; Employing spring coupling connects, its good stability, and additional noise and vibration can be compared very little; Very little on rear-axle whine test impact, result is more reliable; Adopt T-shaped layout, only need a drive unit to drive, drive unit is arranged on the one end away from rear axle assy to be measured, and all parts are fixed on test board by supporting base or bracing frame, and axial-radial stability is all fine; By sensor and test macro, the vibration noise to transmission shaft to be measured and rear axle assy detects, and makes the detection of the vibration noise of the assembly to transmission shaft and back axle more accurately and reliably.
Accompanying drawing explanation
Fig. 1 is transmission shaft of the present invention and rear axle assy vibration performance comprehensive test device structural representation;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is transmission shaft of the present invention and rear axle assy vibration performance integrated test system structural representation;
Fig. 4 is transmission shaft of the present invention and rear axle assy vibration performance integrated test facility process flow diagram.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details.
As depicted in figs. 1 and 2, the present invention includes test board 21, be fixed on the motor 28 on test board 21, the first shaft coupling 27 is provided with successively between described motor 28 and transmission shaft to be measured 23, first torque sensor 26, second shaft coupling 24, the 3rd shaft coupling 29 is provided with successively between transmission shaft 23 to be measured and the main reducing gear 33 of rear axle assy to be measured, second torque sensor 31, 4th shaft coupling 32, described transmission shaft 23 is fixed on test board 21 by transmission shaft pedestal 22, described first torque sensor 26 is fixed on test board 21 by the first torque sensor pedestal 25, described second torque sensor 31 is fixed on test board 21 by the second torque sensor pedestal 30.
The axis of the back axle 9 of preferred described rear axle assy to be measured is vertical with transmission shaft 23 to be arranged, the shape of test board 21 entirety is T-shaped, motor 28 is as drive unit, supply power to transmission shaft 23 to be measured, then pass to main deceleration 33, and rear axle assy is assembled in real vehicle completely the same, preferred apparatus of the present invention are tested in full anechoic chamber, thus avoid the interference of other noises, make test result more accurately and reliably.
One end of back axle 9 in described rear axle assy connects 5-linked axial organ 11 successively according to energy transferring direction, 3rd torque sensor 13, 6th shaft coupling 14, first flywheel 15, 7th shaft coupling 16, first speed reduction unit 18, 8th shaft coupling 19 and the first magnetic powder brake 20, the other end of described back axle 9 connects the 9th shaft coupling 7 successively according to energy transferring direction, 4th torque sensor 5, tenth shaft coupling 4, second flywheel 3, 11 shaft coupling 2, second speed reduction unit 36, 12 shaft coupling 35 and the second magnetic powder brake 34, described back axle 9 two ends parts are symmetrical arranged.Described back axle 9 is fixed on test board 21 by the first back axle pedestal 8 and the second back axle pedestal 10, described 3rd torque sensor 13 is fixed on test board 21 by the 3rd torque sensor pedestal 12, described 4th torque sensor 5 is fixed on test board 21 by the 4th torque sensor pedestal 6, described first speed reduction unit 18 is fixed on test board 21 by the first speed reduction unit pedestal 17, and described second speed reduction unit 36 is fixed on test board 21 by the second speed reduction unit pedestal 1.
The installation of four torque sensors is arranged, and can detect transmission shaft input respectively, export the torque and rotational speed of (being also back axle input), the output of back axle two-semiaxle.
Described first torque sensor pedestal 25, second torque sensor pedestal 30, transmission shaft pedestal 22, the 3rd torque sensor pedestal 12, the 4th torque sensor pedestal 6, first speed reduction unit pedestal 17 and the second speed reduction unit pedestal 1 are supporting base, described supporting base comprises the fixed support portion be fixedly connected with test board 21 and the clamping section, location be fixed all parts, and this routine fixed support portion and test board 21, to locate clamping section all with bolts with the parts be connected separately.
First back axle pedestal 8 of fixing described rear axle assy to be measured and the second back axle pedestal 10 are except comprising fixed support portion, clamping section, location, also be included between fixed support portion and clamping section, location and be provided with the elevating mechanism 37 controlling clamping section, described location and be elevated, described elevating mechanism 37 is spiral lifting mechanism, also other structure can be adopted, reach the object regulating rear axle assy height, ensure the axle center height of Each part in one plane.
First flywheel 15, second flywheel 3 is fixed on test board 21 by bearing, bearing seat and flywheel bracing frame, first flywheel 15, second flywheel 3 is the energy storage devices on test board 21, be used for storing and releasing energy, power is served as, the operating mode of simulated automotive free-wheel counter dragging in running adaptation.
Described first flywheel 15, second flywheel 3, first speed reduction unit 18 and the second speed reduction unit 36 two ends adopt compliant pin shaft coupling, such as resilient key shaft coupling, are used for compensating because two coupling spindles are not identical, the secondary vibration having error to cause; Extend the flywheel bearing life-span.
Anti-imposed load device in this example is the first magnetic powder brake 20 and the second magnetic powder brake 34.Rotate and the loading of magnetic powder brake by controlling motor 28, can simulate very easily transmission shaft to be measured and rear axle assy load car load after various typical conditions.Mainly comprise:
1. unloaded running-in vibration-testing: motor 28 runs according to certain rotating speed, magnetic powder brake, not to system imposed load, is used for simulating transmission shaft and rear axle assy and does not load working condition when car load is not subject to load;
2. load running-in vibration-testing: motor 28 runs according to certain rotating speed, and magnetic powder brake applies certain load to system, this is simulation transmission shaft and rear axle assy working condition when loading car load stand under load;
3. coasting mode vibration-testing: after transmission shaft and rear axle assy operate steadily by certain speed, motor 28 is stopped to operate, utilize the rotator inertia of flywheel and system dragging transmission shaft and rear axle assy to remain in operation, be used for simulating transmission shaft and the duty of rear axle assy when automobile slide operating mode.
The principle of work of this routine transmission shaft and rear axle assy vibration performance comprehensive test device is: utilize motor 28 simulated engine to drive, and through transmission shaft 23 transmission, drives back axle 9 to operate; Back axle 9 two semiaxis output terminals respectively connect a flywheel, and flywheel is used for simulating wheel and vehicle body as energy storage device.Freewheel output is connected to speed reduction unit, after speed reduction unit slows down, connect magnetic powder brake by spring coupling; Apply load through magnetic powder brake, simulation transmission shaft 23 back axle 9 loads the situation that car load back loading runs.
Transmission shaft and rear axle assy vibration performance comprehensive test device the vibration performance under several typical operating mode can be tested truck drive shaft and rear axle assy, and simulation transmission shaft and back axle load the actual condition after car load, provide accurately experimental data; For realizing in the design phase vibration, the noise that reduce truck drive shaft and rear axle assy, for improving drive axle performance and optimal design further, provide real data reference; Objective Quantitative assessment is provided to production quality control, improves truck drive shaft and rear axle assy quality and complete vehicle quality, raising enterprise competitiveness.
As shown in Figure 3, present invention also offers a kind of test macro comprising above-mentioned transmission shaft and rear axle assy vibration performance comprehensive test device, also comprise acceleration transducer, first signal amplifying apparatus, secondary signal multiplying arrangement, data collector, with the industrial computer of display, PLC(programmable logic controller (PLC)) controller, frequency converter, chromacoder, driver, described acceleration transducer is arranged on around transmission shaft to be measured and rear axle assy, described torque sensor is connected with data collector by the first signal amplifying apparatus, described acceleration transducer is connected with data collector by secondary signal multiplying arrangement, described industrial computer is connected with PLC with data collector respectively, described drive unit is connected with described PLC by frequency converter, described PLC is connected with driver by described chromacoder, described driver is connected with described anti-imposed load device.In this example, described drive unit is motor, and described anti-imposed load device is magnetic powder brake, and the power of described frequency converter adjustment drive unit i.e. motor, realizes variable motion.
In order to make test result more accurate, described acceleration transducer is 8, be separately positioned on position that 4 torque sensors arrange, transmission shaft 23 intermediate supports place, rear axle assy main reducing gear 33 place and back axle 9 two axle shaft housings, transmission shaft 23 can be measured respectively and input, export and vibration acceleration signal in transmission process; The vibration acceleration signal that back axle 9 inputs, export; The vibration acceleration signal of rear-end gear reduction 33 and back axle 9 two axle shaft housings, certainly, also can select quantity and the position of acceleration transducer according to actual conditions.
As shown in Figure 4, present invention also offers a kind of transmission shaft and rear axle assy vibration performance integrated test facility, comprise the steps:
S1: transmission shaft to be measured and rear axle assy are installed on transmission shaft and rear axle assy vibration performance comprehensive test device, arranges acceleration transducer;
S2: working condition measurement condition is set: PLC is rotated by Frequency Converter Control drive unit and driven anti-imposed load device by chromacoder control and drive system, simulate transmission shaft to be measured and rear axle assy load car load after various operating modes;
S3: torque sensor detects moment of torsion and tach signal, and is transferred to data collector by the first signal amplifying apparatus; Acceleration transducer detects vibration acceleration signal, and is transferred to data collector by secondary signal multiplying arrangement;
S4: the signal of collection is sent to industrial computer by described data collector;
S5: industrial computer receives the signal of data collector, carries out Digital Signal Analysis and Processing, draws test result;
S6: judge decision-making according to test result.
Particularly, first check the duty of each parts, degree of will speed up sensor is positioned over transmission shaft and rear axle housing correct position place, arranges unloaded running-in, loads running-in and the working condition measurement condition such as to slide; Start test, gather the vibration acceleration signal, moment of torsion and the tach signal that amplify through amplifier, be then transferred to industrial computer, described industrial computer processes signal and analyzes, and obtains test position place vibration level, finally judges whether to meet the requirements.
Described first signal amplifying apparatus and secondary signal multiplying arrangement can be charge amplifier, regulating instrument, voltage amplifier etc., and described chromacoder is D/A converter, and described data collector is data collecting card.
This example can be carried out towing ahead and be rotated forward and load running adaptation, instead drag the unloaded running adaptation of main story under back axle is in loaded state, the duty of simulated automotive transmission shaft and back axle when load is advanced and zero load is slided, the vibration acceleration signal at transmission shaft and the transmission shaft 23 intermediate supports place of rear axle assy, the place such as shell, back axle 9 two axle shaft housings of main reducing gear 33 is detected by acceleration transducer, the test macro of industrial computer inside carries out time-domain and frequency-domain analysis, the time-domain and frequency-domain characteristics of image of display to the data gathered.Then judge the performance of transmission shaft to be measured and rear axle assy according to time-domain and frequency-domain image characteristic analysis and whether have problem, and problem source.
The present invention has following innovative point:
1. the present invention applies power to transmission shaft by motor, then gives back axle; Be simulate car load, be not single simulating main reducing gear imposed load, test result is more accurate.
2. the present invention carries out in complete soundproof room, eliminates outside noise and other people are the impact of factor, and testing result is more true and reliable.
3. the present invention can simulation no-load running-in, loads running-in, rotates forward reversion and runs; Utilize flywheel simulated automotive transmission shaft and the duty of rear axle assy under coasting mode, applicability is stronger.
4. coupling arrangement of the present invention adopts flexible clutch to connect, its good stability, and additional noise and vibration can be compared very little; Testing transmission shaft and rear axle assy vibration performance affects very little, and result is more reliable.
5. the present invention is detected by acceleration transducer and the test macro vibration acceleration to the transmission shaft in test and rear axle assy, makes the detection of the vibration performance of the assembly to transmission shaft and back axle more accurately and reliably.
6. the proving installation of prior art needs three drive motor, and the layout of device adopts solid space to arrange, installation process is complicated; The vibration of three motors itself also can affect the accuracy of back axle test; The present invention adopts T-shaped layout, and only need a motor to drive, motor is in the one end away from rear axle assy to be measured, and all devices are arranged on bracing frame, and axial-radial stability is all fine.
The embodiment of the above is better embodiment of the present invention; not limit specific embodiment of the invention scope with this; scope of the present invention comprises and is not limited to this embodiment, and all equivalence changes done according to the present invention are all in protection scope of the present invention.
Claims (10)
1. transmission shaft and rear axle assy vibration performance comprehensive test device, it is characterized in that: comprise test board, be fixed on the drive unit on test board, energy storage device, reduction gear and anti-imposed load device, described drive unit is connected with transmission shaft to be measured, the back axle two ends of rear axle assy to be measured connect energy storage device successively according to energy transferring direction, reduction gear and anti-imposed load device, described energy storage device, reduction gear and anti-imposed load device rotational symmetry centered by back axle is arranged, described transmission shaft and rear axle assy vibration performance comprehensive test device also comprise multiple torque sensor, be arranged on around transmission shaft to be measured and rear axle assy.
2. transmission shaft according to claim 1 and rear axle assy vibration performance comprehensive test device, is characterized in that: described test board entirety is for T-shaped.
3. transmission shaft according to claim 1 and 2 and rear axle assy vibration performance comprehensive test device, it is characterized in that: described torque sensor is four, be separately positioned between drive unit and transmission shaft to be measured, between transmission shaft to be measured and rear axle assy main reducing gear to be measured, between rear axle assy to be measured and energy storage device.
4. transmission shaft according to claim 1 and 2 and rear axle assy vibration performance comprehensive test device, is characterized in that: described torque sensor, transmission shaft to be measured and rear axle assy and reduction gear are fixed on test board by respective supporting base.
5. transmission shaft according to claim 4 and rear axle assy vibration performance comprehensive test device, it is characterized in that: described supporting base comprises the fixed support portion be fixedly connected with test board and the clamping section, location be fixed all parts, the supporting base of described rear axle assy to be measured is also included between fixed support portion and clamping section, location and is provided with the elevating mechanism controlling clamping section, described location and be elevated.
6. transmission shaft according to claim 1 and 2 and rear axle assy vibration performance comprehensive test device, is characterized in that: described energy storage device is fixed on test board by bearing, bearing seat and energy storage device bracing frame.
7. transmission shaft according to claim 1 and 2 and rear axle assy vibration performance comprehensive test device, it is characterized in that: between described rear axle assy to be measured and energy storage device, between described energy storage device and reduction gear, between described reduction gear with anti-imposed load device, adopt resilient key shaft coupling to be connected.
8. one kind contains the test macro of transmission shaft and rear axle assy vibration performance comprehensive test device described in any one of claim 1-7, it is characterized in that: also comprise acceleration transducer, first signal amplifying apparatus, secondary signal multiplying arrangement, data collector, with the industrial computer of display, PLC, frequency converter, chromacoder, driver, described acceleration transducer is arranged on around transmission shaft to be measured and rear axle assy, described torque sensor is connected with data collector by the first signal amplifying apparatus, described acceleration transducer is connected with data collector by secondary signal multiplying arrangement, described industrial computer is connected with PLC with data collector respectively, described drive unit is connected with described PLC by frequency converter, described PLC is connected with driver by described chromacoder, described driver is connected with described anti-imposed load device.
9. transmission shaft according to claim 8 and rear axle assy vibration performance integrated test system, it is characterized in that: described acceleration transducer is 8, be separately positioned between drive unit and transmission shaft to be measured, between transmission shaft to be measured and rear axle assy main reducing gear to be measured, between rear axle assy to be measured and energy storage device, transmission shaft intermediate supports place to be measured, on rear axle assy main reducing gear to be measured and on rear axle assy to be measured two axle shaft housings.
10. realize the method for testing of transmission shaft described in claim 8 or 9 and rear axle assy vibration performance comprehensive test device, it is characterized in that comprising the steps:
S1: transmission shaft to be measured and rear axle assy are installed on transmission shaft and rear axle assy vibration performance comprehensive test device, arranges acceleration transducer;
S2: working condition measurement condition is set: PLC is rotated by Frequency Converter Control drive unit and driven anti-imposed load device by chromacoder control and drive system, simulate transmission shaft to be measured and rear axle assy load car load after various operating modes;
S3: torque sensor detects moment of torsion and tach signal, and is transferred to data collector by the first signal amplifying apparatus; Acceleration transducer detects vibration acceleration signal, and is transferred to data collector by secondary signal multiplying arrangement;
S4: the signal of collection is sent to industrial computer by described data collector;
S5: industrial computer receives the signal of data collector, carries out Digital Signal Analysis and Processing, draws test result;
S6: judge decision-making according to test result.
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| CN201510855895.1A CN105372032A (en) | 2015-11-30 | 2015-11-30 | Device, system and method of vibration performance integration testing of transmission shaft and rear axle assembly |
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| CN201510855895.1A CN105372032A (en) | 2015-11-30 | 2015-11-30 | Device, system and method of vibration performance integration testing of transmission shaft and rear axle assembly |
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| CN107907350B (en) * | 2017-12-30 | 2024-03-29 | 浙江联宜电机有限公司 | Load simulator for drive axle of scooter |
| CN107991108A (en) * | 2018-03-05 | 2018-05-04 | 安徽安凯汽车股份有限公司 | A kind of rear axle of passenger vehicle drives carrier arrangement |
| CN109100137A (en) * | 2018-07-10 | 2018-12-28 | 重庆理工清研凌创测控科技有限公司 | A kind of NVH off-line test platform of rear axle reductor |
| CN110285965A (en) * | 2019-07-09 | 2019-09-27 | 南京农业大学 | A kind of speed change box of tractor performance detection testing bench |
| CN111458016A (en) * | 2019-11-29 | 2020-07-28 | 一汽解放汽车有限公司 | Method for rapidly detecting vibration of drive axle assembly |
| CN110907199B (en) * | 2019-12-31 | 2022-02-01 | 一汽解放汽车有限公司 | Impact durability test bed and bench test method for differential lock between wheels of drive axle |
| CN110907199A (en) * | 2019-12-31 | 2020-03-24 | 一汽解放汽车有限公司 | Impact durability test bed and bench test method for differential lock between wheels of drive axle |
| CN111855197A (en) * | 2020-07-22 | 2020-10-30 | 武汉理工通宇新源动力有限公司 | Test bed for testing electric drive axle assembly |
| CN112557029B (en) * | 2020-12-10 | 2022-08-26 | 湖北科峰智能传动股份有限公司 | AGV speed reducer load test platform |
| CN112557029A (en) * | 2020-12-10 | 2021-03-26 | 湖北科峰智能传动股份有限公司 | AGV speed reducer load test platform |
| CN113063588A (en) * | 2021-04-07 | 2021-07-02 | 四川建安工业有限责任公司 | Independent main NVH bench test fixing tool |
| CN117030257A (en) * | 2023-10-10 | 2023-11-10 | 天津工业大学 | Aerospace bearing test machine |
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| CN117268673A (en) * | 2023-11-22 | 2023-12-22 | 徐州永盛机电有限公司 | Rear axle test bed |
| CN117268673B (en) * | 2023-11-22 | 2024-01-30 | 徐州永盛机电有限公司 | Rear axle test bed |
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