A heavy-duty AMT transmission loaded offline test bench

Abstract

The present invention provides a heavy-duty AMT transmission loaded offline test bench, which relates to the field of testing technology and equipment, including a wiring harness and pipeline docking module, an input drive mechanism, a clamping mechanism, an NVH testing mechanism, a lifting docking mechanism and an output loading mechanism; the wiring harness and pipeline docking module is fixedly connected to the upper middle position of a mechanical support frame; the input drive mechanism is arranged above the input drive support frame; the clamping mechanism is arranged in front of the clamping support frame; the NVH testing mechanism is arranged below the NVH testing frame; the lifting docking mechanism is arranged above the lifting docking frame; the output loading mechanism is arranged above the output loading support frame. The test bench of the present invention meets the requirements of rapid clamping of transmissions with various specifications and complex structural forms, facilitates the detection of transmissions, improves detection efficiency, reduces product failure rate, and solves the problem that the existing manual detection is low in efficiency and cannot accurately and effectively detect the performance of the transmission.

Description

Technical Field

[0001] The present invention relates to the field of testing technology and equipment technology, and in particular to a heavy-duty AMT gearbox loading offline test bench. Background Art

[0002] The overall structure of a car is complex, and the transmission assembly in the transmission system is one of the important components that is directly related to the performance of the transmission system. Heavy-duty trucks have many transmission models, large speed ratio variations, and many gears, which require many items to be tested. The traditional transmission testing method is to listen (noise and abnormal sounds), touch (manual shifting performance, etc.), and look (smooth operation of each gear and appearance inspection).

[0003] The patent application number is CN201610429596.6. This invention relates to a test bench, specifically a vehicle transmission loading test bench and its test adjustment method. The test bench comprises a test frame equipped with a drive input shaft assembly, a component under test, and a drive output shaft assembly. The drive output shaft assembly is connected to the drive input shaft assembly via an output pulley assembly. The horizontal spacing between the drive input shaft assembly and the drive output shaft assembly is adjusted via an adjustment assembly. The drive input shaft assembly and the drive output shaft assembly are arranged horizontally in an upper and lower direction. The vehicle transmission loading test bench and its test adjustment method offer low operating costs, a wide range of adaptability, and excellent operational performance.

[0004] However, the existing manual inspection method not only wastes man-hours and has low inspection efficiency, but is also restricted by the workers' operating skills and cannot accurately and effectively detect the performance of the transmission, resulting in some defective transmissions entering the market. The manual inspection method cannot adapt to the fast pace of current product production and manufacturing, which affects the production efficiency of the transmission. Summary of the Invention

[0005] In view of this, the present invention provides a heavy-duty AMT transmission loading offline test bench, which has the characteristics of the test bench meeting the needs of rapid clamping of various specifications and models of complex structural forms of transmissions, as well as a wide speed and torque range, which facilitates the detection of transmissions, improves detection efficiency, realizes the detection of transmissions under actual usage conditions, ensures the reliability of test results, covers multiple detection functions, including speed, torque, noise, gear selection and shifting force, odometer and pressure switch performance detection, and plays a great supporting role in improving the production quality of high-end heavy-duty transmission products, reducing product failure rate, and improving offline detection efficiency.

[0006] The present invention provides a purpose and function of a heavy-duty AMT transmission loading offline test bench, which specifically includes a mechanical support frame, an input drive support frame, a clamping support frame, an NVH test frame, a wiring harness and pipeline docking module, a lifting docking frame, an output loading support frame, a transmission under test, a protective mechanism, an input drive mechanism, a clamping mechanism, an NVH test mechanism, a lifting docking mechanism, and an output loading mechanism;

[0007] The input drive support frame is assembled on the upper side of the mechanical support frame by means of bolts;

[0008] The clamping support frame is assembled at the upper middle position of the mechanical support frame by means of bolts;

[0009] The NVH test frame is assembled on the protective cover above the clamping support frame by bolts, and a slide structure is provided at the lower end of the NVH test frame;

[0010] The wiring harness and pipeline docking module is fixedly connected to the upper middle position of the mechanical support frame;

[0011] The lifting docking frame is arranged above the mechanical support frame, and a lifting hydraulic cylinder structure is arranged inside the lifting docking frame;

[0012] The output loading support frame is fixedly connected to the upper front end of the mechanical support frame;

[0013] The transmission under test is placed above the lifting docking frame;

[0014] The protection mechanism is arranged above the mechanical support frame;

[0015] The input drive mechanism is arranged above the input drive support frame;

[0016] The clamping mechanism is arranged in front of the clamping support frame;

[0017] The NVH test mechanism is arranged below the NVH test stand;

[0018] The lifting and docking mechanism is arranged above the lifting and docking frame;

[0019] The output loading mechanism is arranged above the output loading support frame.

[0020] Furthermore, the protection mechanism includes: a protective cover;

[0021] The protective cover is fixedly connected to the upper part of the mechanical support frame, and the front end of the protective cover is hinged with multiple groups of door panel structures.

[0022] Furthermore, the input drive mechanism includes: an input drive motor, a first input coupling, a drive torque sensor adapter plate, a torque limiter, an input torque sensor, a second input coupling, a first input main shaft system, a first input main shaft component, a first clutch flywheel, a clutch pressure plate, a transition spline shaft, a release bearing component, a release bearing guide sleeve, a second input main shaft system end cover, a second input main shaft system, a second input main shaft component, a second clutch flywheel and a clutch internal pressure plate;

[0023] The input drive motor is fixedly connected to the upper part of the input drive support frame;

[0024] The first input coupling is connected to the output shaft of the input drive motor via a flat key;

[0025] The drive torque sensor adapter plate is fixedly connected to the first input coupling by bolt locking and stopper positioning;

[0026] The torque limiter is fixedly connected to the drive torque sensor adapter plate by bolt locking and stopper positioning;

[0027] The input torque sensor is fixedly connected to the torque limiter via a flange;

[0028] The second input coupling is fixedly connected to the input torque sensor via bolts;

[0029] The first input main shaft is fixedly connected to the second input coupling via a flat key;

[0030] The first input main shaft is coaxially fixedly connected to the front of the first input main shaft system;

[0031] The first clutch flywheel is fixedly connected to the first input main shaft by bolts, and the first clutch flywheel is a 330 clutch flywheel structure;

[0032] The clutch pressure plate is fixedly connected to the front of the first clutch flywheel;

[0033] The outer splines of the transition spline shaft are connected to the inner splines of the clutch pressure plate through splines;

[0034] The separation bearing member is arranged above the mechanical support frame,

[0035] The release bearing guide sleeve is clearance-matched with the release bearing member;

[0036] The second input main shaft end cover is fixedly connected to the release bearing guide sleeve by bolts;

[0037] The second input main shaft is fixedly connected to the front end of the second input main shaft end cover;

[0038] The second input main shaft is coaxially fixedly connected to the interior of the second input main shaft system;

[0039] The second clutch flywheel is fixedly connected to the second input main shaft by bolts, and the second clutch flywheel is a 430 clutch plate structure;

[0040] The clutch inner pressing plate is arranged inside the second clutch flywheel.

[0041] Furthermore, the input drive mechanism includes: a modified spline sleeve and a transmission input shaft;

[0042] The modified spline sleeve is spline-connected to the second clutch flywheel;

[0043] The transmission input shaft is spline-connected to the modified spline sleeve, and the transmission input shaft is rotationally connected to the input end of the transmission under test.

[0044] Furthermore, the clamping mechanism includes: a clamping positioning plate, a clamping bolt, a clamping guide pin and a clamping hydraulic cylinder;

[0045] The clamping positioning plate is fixedly connected to the front of the clamping support frame, and the transmission under test is matched with the clamping positioning plate through a stop.

[0046] The clamping bolts are provided in multiple groups, and the multiple groups of clamping bolts are respectively threadedly connected to the clamping positioning plates;

[0047] The clamping guide pins are provided in multiple groups, and the multiple groups of clamping guide pins are respectively guided and connected to the front end of the clamping positioning plate;

[0048] The clamping hydraulic cylinders are provided in multiple groups, and the multiple groups of clamping hydraulic cylinders are respectively fixedly connected to the inside of the clamping support frame.

[0049] Furthermore, the NVH testing mechanism includes: a movable fixed plate, an NVH fixed plate, an X-axis electric cylinder, a Z-axis air cylinder, a pressure head mounting seat and a vibration sensor;

[0050] The movable fixing plates are provided in multiple groups, and the multiple groups of movable fixing plates are respectively slidably connected to the inside of the slide groove of the NVH test frame;

[0051] The NVH fixed plate is slidably connected below the movable fixed plate;

[0052] The X-axis electric cylinder is fixedly connected to the left side of the NVH fixing plate;

[0053] The Z-direction air cylinder is fixedly connected to the left side of the push rod of the X-direction electric cylinder;

[0054] The pressure head mounting seat is fixedly connected to the lower part of the piston rod of the Z-direction cylinder;

[0055] The vibration sensor is fixedly connected below the pressure head mounting seat.

[0056] Further, the lifting and docking mechanism includes: a lifting and docking tray;

[0057] The lifting docking tray is fixedly connected above the lifting docking frame, and the transmission to be tested is placed above the lifting docking tray.

[0058] Furthermore, the output loading mechanism includes: an output loading motor, a first output loading coupling, a loading torque sensor adapter plate, a coupling component, an output torque sensor, a second output loading coupling, a loading main shaft system, a loading main shaft component, a loading press sleeve, a docking spline shaft and an output transition plate;

[0059] The output loading motor is fixedly connected above the output loading support frame;

[0060] The first output loading coupling is connected to the output shaft of the output loading motor via a flat key;

[0061] The loading torque sensor adapter plate is fixedly connected to the stopper-positioned first output loading coupling by means of bolt locking;

[0062] The coupling device is fixedly connected to the loading torque sensor adapter plate by bolt locking and stopper positioning;

[0063] The output torque sensor is fixedly connected to the coupling device via bolts;

[0064] The second output loading coupling is fixedly connected to the output torque sensor via bolts;

[0065] The loading main shaft is fixedly connected to the rear end of the second output loading coupling;

[0066] The loading main shaft is arranged at the rear end of the loading main shaft system, and the loading main shaft is transmission-connected to the second output loading coupling via a flat key;

[0067] The loading sleeve flange is connected to the rear end of the loading main shaft.

[0068] Furthermore, the output loading mechanism includes: a butt spline shaft and an output transition disc;

[0069] The butt spline shaft is key-connected to the rear end of the loading sleeve;

[0070] The output transition plate is rotatably connected to the output end of the transmission under test, and the output transition plate is connected to the docking spline shaft through a spline.

[0071] Beneficial effects

[0072] In addition, the present invention provides a protective cover, wherein the protective cover 101 realizes the protection function of the input module and the output module positions, and at the same time facilitates the maintenance operation of the maintenance personnel.

[0073] In addition, the present invention realizes the simulation of the movement state of the transmission when the engine is running and the input of the kinetic energy of the transmission by setting the input drive mechanism and docking with the transmission through the drive of the motor. The simulated engine is used to provide driving force to the tested transmission. The driving main shaft system is composed of two shaft systems, one of which is used to carry the MT clutch flywheel, driven plate, and pressure plate, and the other is used to carry the AMT clutch simulated inertia plate. The entire transmission chain has good overall dynamic balance performance. The axial docking structure is used for docking one shaft of the test piece. The spline sleeve of one shaft is an automatic telescopic structure and can be replaced according to product specifications, which facilitates the detection of the transmission and improves the detection efficiency.

[0074] In addition, the present invention sets up a clamping mechanism, and the clamping mechanism includes a hydraulic clamping device and related accessories. The test piece can be guided by a guide pin, positioned by a positioning plate, and locked by a hydraulic claw to achieve automatic clamping. At the same time, the clamping mechanism of the present invention refines the same characteristics of test pieces of different models and different protocol numbers. One plate can be used for multiple purposes for different off-shell positioning flanges. One positioning plate is used to position multiple test pieces. For test pieces with different off-shell flanges, the hydraulic clamping is adjusted through an adjustment device to achieve rapid production change, so that the entire detection test bench can clamp different models of transmissions, and has a wide range of applications.

[0075] In addition, the present invention sets up an NVH testing mechanism, and the NVH system adopts two channels, which can self-learn to establish a mechanical vibration reference benchmark of the test piece, and determine whether the test piece has defects by comparing the current vibration of the test piece with the reference benchmark deviation, and is equipped with NVH pressure measurement actuators and vibration sensors; the pressure measurement actuator is equipped with an electric cylinder and a pneumatic cylinder in the X / Y / Z directions, and automatically adjusts the measurement point position according to user needs. It is compatible with all products and has the ability to judge gear surface problems, such as tooth surface sequence leakage (unground teeth), gear collision (bulge), bearing defects and other faults, thereby improving the accuracy of transmission detection results, improving detection efficiency, reducing labor costs, and alleviating workers' labor intensity.

[0076] In addition, the present invention sets an output loading mechanism, which simulates the driving load and is used to add a reaction force to the transmission. The loading shaft system is designed with a flexible telescopic spline. Since the axial runout of the output flange of the test piece is large, a certain axial force will be generated during operation. The shaft system bearing scheme eliminates axial runout and can effectively prevent the axial displacement from being transmitted to the coupling, ensuring its service life. This realizes the detection of the transmission under actual usage conditions and ensures the reliability of the test results.

[0077] The test bench of the present invention meets the requirements of rapid clamping of transmissions with various specifications and models and complex structural forms, as well as the characteristics of a wide speed and torque range, which facilitates the detection of transmissions, improves the detection efficiency, realizes the detection of transmissions under actual usage conditions, ensures the reliability of test results, and covers multiple detection functions, including speed, torque, noise, gear selection and shifting force, odometer and pressure switch performance detection, which plays a great supporting role in improving the production and manufacturing quality of high-end heavy-duty transmission products, reducing product failure rate, and improving off-line detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0079] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0080] In the attached figure:

[0081] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0082] Figure 2 It is a schematic diagram of the protective cover structure of an embodiment of the present invention.

[0083] Figure 3 2 is a schematic structural diagram of an input drive mechanism according to an embodiment of the present invention.

[0084] Figure 4 Schematic diagram of the input torque sensor structure according to an embodiment of the present invention.

[0085] Figure 5 It is a schematic structural diagram of a modified spline sleeve according to an embodiment of the present invention.

[0086] Figure 6 It is a schematic diagram of the transmission input shaft structure of an embodiment of the present invention.

[0087] Figure 7 2 is a schematic diagram of the output loading mechanism structure of an embodiment of the present invention.

[0088] Figure 8 It is a schematic structural diagram of an output transition plate according to an embodiment of the present invention.

[0089] Figure 9 Schematic diagram of the input drive motor structure of an embodiment of the present invention.

[0090] Figure 10 The embodiment of the present invention Figure 9 Schematic diagram of the locally enlarged structure at point D in the middle.

[0091] Figure 11The embodiment of the present invention Figure 9 Schematic diagram of the locally enlarged structure at point E in the middle.

[0092] Figure 12 It is a schematic diagram of the clamping cylinder structure of an embodiment of the present invention.

[0093] Figure 13 The embodiment of the present invention Figure 12 Schematic diagram of the cross-sectional structure at AA in the middle.

[0094] Figure 14 The embodiment of the present invention Figure 13 Schematic diagram of the partially enlarged structure at point F in the middle.

[0095] Figure 15 Schematic diagram of the NVH test structure of an embodiment of the present invention.

[0096] Figure 16 It is a structural schematic diagram of a lifting docking tray according to an embodiment of the present invention.

[0097] Reference Signs List

[0098] 1. Mechanical support frame; 101. Protective cover; 2. Input drive support frame; 201. Input drive motor; 202. First input coupling; 203. Drive torque sensor adapter plate; 204. Torque limiter; 205. Input torque sensor; 206. Second input coupling; 207. First input main shaft system; 208. First input main shaft component; 209. First clutch flywheel; 210. Clutch pressure plate; 211. Transition spline shaft; 212. Release bearing component; 213. Release bearing guide sleeve; 214. Second input main shaft system end cover; 215. Second input main shaft system; 216. Second input main shaft component; 217. Second clutch flywheel; 218. Clutch internal pressure plate; 219. Modified spline sleeve; 220. Transmission input shaft; 3. Clamping support frame; 301. Clamping Positioning plate; 302, clamping bolt; 303, clamping guide pin; 304, clamping hydraulic cylinder; 4, NVH test frame; 401, moving fixed plate; 402, NVH fixed plate; 403, X-axis electric cylinder; 404, Z-axis cylinder; 405, pressure head mounting seat; 406, vibration sensor; 5, wiring harness and pipeline docking module; 6, lifting docking frame; 601, lifting docking tray; 7, output loading support frame; 701, output loading motor; 702, first output loading coupling; 703, loading torque sensor adapter plate; 704, coupling device; 705, output torque sensor; 706, second output loading coupling; 707, loading main shaft system; 708, loading main shaft component; 709, loading sleeve; 710, docking spline shaft; 711, output transition plate; 8, transmission under test. DETAILED DESCRIPTION

[0099] Example 1: Please refer to Figures 1 to 2 As shown:

[0100] The present invention provides a heavy-duty AMT transmission loading offline test bench, comprising a mechanical support frame 1, an input drive support frame 2, a clamping support frame 3, an NVH test frame 4, a wiring harness and pipeline docking module 5, a lifting docking frame 6, an output loading support frame 7, a transmission under test 8, and a protective mechanism;

[0101] The input drive support frame 2 is bolted onto the top of the mechanical support frame 1;

[0102] The bolts of the clamping support frame 3 are assembled in the middle position above the mechanical support frame 1;

[0103] The NVH test frame 4 is bolted to the top of the clamping support frame 3, and a slide structure is provided at the lower end of the NVH test frame 4;

[0104] The wiring harness and pipeline docking module 5 is fixedly connected to the upper middle position of the mechanical support frame 1;

[0105] The lifting docking frame 6 is arranged above the mechanical support frame 1, and a lifting hydraulic cylinder structure is arranged inside the lifting docking frame 6;

[0106] The output loading support frame 7 is fixedly connected to the upper front end of the mechanical support frame 1;

[0107] The transmission under test 8 is placed above the lifting docking frame 6. The wiring harness and pipeline docking module 5 integrates the wiring harness and pipelines of the transmission under test 8 into the combined connector. The wiring harness and pipeline docking module 5 uses a hydraulic actuator to automatically dock the wiring harness and pipelines with the transmission under test 8.

[0108] The protection mechanism is arranged above the mechanical support frame 1 .

[0109] The protection mechanism includes: a protection cover 101;

[0110] The protective cover 101 is fixedly connected to the top of the mechanical support frame 1. The front end of the protective cover 101 is hinged with multiple sets of door panel structures. During use, the protective cover 101 realizes the protection function of the input module and output module positions, and at the same time facilitates the maintenance operations of maintenance personnel.

[0111] Example 2:

[0112] Based on the first embodiment, Figures 1 to 10 As shown, it also includes an input drive mechanism, which is arranged above the input drive support frame 2.

[0113] The input drive mechanism includes: an input drive motor 201, a first input coupling 202, a drive torque sensor adapter plate 203, a torque limiter 204, an input torque sensor 205, a second input coupling 206, a first input main shaft system 207, a first input main shaft component 208, a first clutch flywheel 209, a clutch pressure plate 210, a transition spline shaft 211, a release bearing component 212, a release bearing guide sleeve 213, a second input main shaft system end cover 214, a second input main shaft system 215, a second input main shaft component 216, a second clutch flywheel 217, a clutch internal pressure plate 218, a modified spline sleeve 219 and a transmission input shaft 220;

[0114] The input drive motor 201 is fixedly connected to the upper part of the input drive support frame 2;

[0115] The first input coupling 202 is connected to the output shaft of the input drive motor 201 via a flat key;

[0116] The driving torque sensor adapter plate 203 is fixedly connected to the first input coupling 202 by means of bolt locking and stopper positioning;

[0117] The torque limiter 204 is fixedly connected to the drive torque sensor adapter plate 203 by bolt locking and stopper positioning. The front and rear ends of the torque limiter 204 are flange structures.

[0118] The input torque sensor 205 is fixedly connected to the torque limiter 204 via a flange;

[0119] The second input coupling 206 is fixedly connected to the input torque sensor 205 via bolts;

[0120] The first input main shaft system 207 is fixedly connected to the second input coupling 206 via a flat key;

[0121] The first input main shaft 208 is coaxially fixedly connected to the front of the first input main shaft system 207, and a flange structure is provided at the front end of the first input main shaft 208;

[0122] The first clutch flywheel 209 is fixedly connected to the first input main shaft 208 by bolts. The first clutch flywheel 209 is a 330 clutch flywheel structure;

[0123] The clutch pressure plate 210 is fixedly connected to the front of the first clutch flywheel 209;

[0124] The external splines of the transition spline shaft 211 are connected to the internal splines of the clutch pressure plate 210 through splines;

[0125] The release bearing member 212 is arranged above the mechanical support frame 1 and is fixedly connected to the outer periphery of the transition spline shaft 211;

[0126] The release bearing guide sleeve 213 is clearance-matched with the release bearing member 212 , and a flange structure is provided at the front end of the release bearing guide sleeve 213 ;

[0127] The second input main shaft end cover 214 is fixedly connected to the release bearing guide sleeve 213 by bolts;

[0128] The second input main shaft system 215 is fixedly connected to the front end of the second input main shaft system end cover 214;

[0129] The second input main shaft 216 is coaxially fixedly connected to the interior of the second input main shaft system 215;

[0130] The second clutch flywheel 217 is fixedly connected to the second input main shaft 216 by bolts. The second clutch flywheel 217 is a 430 clutch plate structure;

[0131] The clutch inner pressure plate 218 is disposed inside the second clutch flywheel 217;

[0132] The modified spline sleeve 219 is spline-connected to the second clutch flywheel 217;

[0133] The transmission input shaft 220 is spline-connected to the modified spline sleeve 219, and the transmission input shaft 220 is drivingly connected to the input end of the transmission 8 under test;

[0134] During use, when the transmission 8 under test needs to be tested, the input drive motor 201 is turned on, and the rotation of the input drive motor 201 drives the first input coupling 202 to rotate, and the rotation of the first input coupling 202 drives the second input coupling 206 to rotate, and the rotation of the second input coupling 206 drives the first input main shaft 208 to rotate, and the rotation of the first input main shaft 208 drives the first clutch flywheel 209 to rotate, and the rotation of the first clutch flywheel 209 drives the second input main shaft 216 to rotate, and the rotation of the second input main shaft 216 drives the modified spline sleeve 219 to rotate, and the rotation of the modified spline sleeve 219 realizes the transmission of kinetic energy, and the rotation of the modified spline sleeve 219 drives the transmission input shaft 220 to rotate, and the rotation of the transmission input shaft 220 drives the transmission 8 under test to start working, thereby realizing the simulation of the engine operating environment. At the same time, the torque limiter 204 realizes overload protection for the entire drive input module to prevent mechanical damage.

[0135] Example 3:

[0136] Based on the first embodiment, Figures 12 to 14 As shown, it also includes a clamping mechanism, which is arranged in front of the clamping support frame 3.

[0137] The clamping mechanism includes: a clamping positioning plate 301, a clamping bolt 302, a clamping guide pin 303 and a clamping hydraulic cylinder 304;

[0138] The clamping positioning plate 301 is fixedly connected to the front of the clamping support frame 3, and the transmission 8 to be tested is matched with the clamping positioning plate 301 through the stopper;

[0139] The clamping bolts 302 are provided in multiple groups, and the multiple groups of clamping bolts 302 are respectively threadedly connected to the clamping positioning plate 301;

[0140] The clamping guide pins 303 are provided in multiple groups, and the multiple groups of clamping guide pins 303 are respectively guided and connected to the front end of the clamping positioning plate 301;

[0141] The clamping hydraulic cylinder 304 is provided with multiple groups, and the multiple groups of clamping hydraulic cylinders 304 are respectively fixedly connected to the inside of the clamping support frame 3. The multiple groups of clamping hydraulic cylinders 304 are all corner hydraulic cylinder structures. In use, when it is necessary to clamp the transmission 8 under test, the stop of the transmission 8 under test is first matched with the clamping positioning plate 301, and then the clamping guide pin 303 realizes the guiding function of the transmission 8 under test, ensuring the accuracy of the clamping position of the transmission 8 under test, and at the same time opens the clamping hydraulic cylinder 304, and the clamping hydraulic cylinder 304 controls the swing of the piston rod. The swing of the piston rod of the clamping hydraulic cylinder 304 realizes the automatic clamping of the transmission 8 under test, which is convenient for the subsequent detection of the transmission 8 under test.

[0142] Example 4:

[0143] Based on the first embodiment, Figure 15 As shown, it also includes an NVH test mechanism, which is arranged below the NVH test stand 4.

[0144] The NVH test mechanism includes: a movable fixed plate 401, an NVH fixed plate 402, an X-axis electric cylinder 403, a Z-axis air cylinder 404, a pressure head mounting seat 405 and a vibration sensor 406;

[0145] There are multiple groups of movable fixed plates 401, and the multiple groups of movable fixed plates 401 are slidably connected to the inside of the slide groove of the NVH test frame 4;

[0146] The NVH fixed plate 402 is slidably connected below the movable fixed plate 401;

[0147] The X-axis electric cylinder 403 is fixedly connected to the left side of the NVH fixing plate 402;

[0148] The Z-direction air cylinder 404 is fixedly connected to the left side of the push rod of the X-direction electric cylinder 403;

[0149] The pressure head mounting base 405 is fixedly connected to the lower part of the piston rod of the Z-direction cylinder 404;

[0150] The vibration sensor 406 is fixedly connected below the pressure head mounting base 405 .

[0151] During use, when it is necessary to detect the vibration of the transmission 8 under test, the X-axis electric cylinder 403 and the Z-axis air cylinder 404 are opened respectively, and the position of the vibration sensor 406 is adjusted. Then, the vibration sensor 406 is brought into contact with the detection position of the transmission 8 under test. Then, the vibration sensor 406 measures the vibration signal during the main reduction operation process. With the help of order and frequency analysis tools, it is compared with the typical characteristic spectrum of this type of product. Based on the reference value, it is determined whether the test piece has product defects, and the fault point and cause of the fault are located quickly and accurately, replacing manual judgment and avoiding the outflow of defective products caused by human errors.

[0152] Embodiment 5:

[0153] Based on the first embodiment, Figure 16 As shown, it also includes a lifting docking mechanism, which is arranged above the lifting docking frame 6.

[0154] The lifting and docking mechanism includes: a lifting and docking tray 601;

[0155] The lifting docking tray 601 is fixedly connected to the upper part of the lifting docking frame 6 , and the transmission 8 to be tested is placed on the lifting docking tray 601 .

[0156] During use, when the transmission 8 under test needs to be inspected, the transmission 8 under test is placed above the lifting docking tray 601, and then the hydraulic cylinder of the lifting docking frame 6 is opened. At this time, the hydraulic cylinder inside the lifting docking frame 6 drives the lifting docking tray 601 to move upward, and the lifting docking tray 601 moves upward, driving the transmission 8 under test to move upward. The upward movement of the transmission 8 under test facilitates the subsequent clamping and docking of the transmission 8 under test.

[0157] Example 6:

[0158] Based on the first embodiment, Figures 1 to 11 As shown, it also includes an output loading mechanism, which is arranged above the output loading support frame 7.

[0159] The output loading mechanism includes: an output loading motor 701, a first output loading coupling 702, a loading torque sensor adapter plate 703, a coupling component 704, an output torque sensor 705, a second output loading coupling 706, a loading main shaft system 707, a loading main shaft component 708, a loading press sleeve 709, a docking spline shaft 710, an output transition plate 711, a docking spline shaft 710 and an output transition plate 711;

[0160] The output loading motor 701 is fixedly connected to the top of the output loading support frame 7;

[0161] The first output loading coupling 702 is connected to the output shaft of the output loading motor 701 via a flat key;

[0162] The loading torque sensor adapter plate 703 is fixedly connected to the stopper-positioned first output loading coupling 702 by means of bolt locking;

[0163] The coupling device 704 is fixedly connected to the loading torque sensor adapter plate 703 by bolt locking and stopper positioning. The front and rear ends of the coupling device 704 are both provided with flange structures.

[0164] The output torque sensor 705 is fixedly connected to the coupling device 704 via bolts;

[0165] The second output loading coupling 706 is fixedly connected to the output torque sensor 705 via bolts;

[0166] The loading main shaft system 707 is fixedly connected to the rear end of the second output loading coupling 706;

[0167] The loading main shaft 708 is arranged at the rear end of the loading main shaft system 707, and the loading main shaft 708 is transmission-connected to the second output loading coupling 706 via a flat key;

[0168] The loading sleeve 709 is flange-connected to the rear end of the loading spindle 708;

[0169] The butt spline shaft 710 is spline-connected to the rear end of the loading sleeve 709;

[0170] The output transition disc 711 is rotatably connected to the output end of the transmission 8 to be tested, and the output transition disc 711 is connected to the docking spline shaft 710 through a spline.

[0171] During use, the entire output loading mechanism simulates the driving load and is used to add a reaction force to the transmission. By turning on the output loading motor 701, the output loading motor 701 rotates to drive the first output loading coupling 702 to rotate, the first output loading coupling 702 rotates to drive the coupling device 704 to rotate, the coupling device 704 rotates to drive the second output loading coupling 706 to rotate, the second output loading coupling 706 rotates to drive the loading main shaft 708 to rotate, the loading main shaft 708 rotates to drive the docking spline shaft 710 to rotate, the docking spline shaft 710 rotates to drive the output transition plate 711 to rotate, the output transition plate 711 rotates to drive the output end of the tested transmission 8 to rotate, at this time, the simulation of the tested transmission 8 under the driving load state is achieved, and the accuracy of the test results is guaranteed.

Claims

1. A heavy-duty AMT gearbox loading offline test bench, characterized in that: The invention comprises a mechanical support frame (1), an input drive support frame (2), a clamping support frame (3), an NVH test frame (4), a wiring harness and pipeline docking module (5), a lifting docking frame (6), an output loading support frame (7), a transmission under test (8), a protective mechanism, an input drive mechanism, a clamping mechanism, an NVH test mechanism, a lifting docking mechanism and an output loading mechanism; the input drive support frame (2) is assembled on the upper part of the mechanical support frame (1) by bolts; the clamping support frame (3) is assembled on the middle position above the mechanical support frame (1) by bolts; the NVH test frame (4) is assembled on the protective cover above the clamping support frame (3) by bolts, and the lower end of the NVH test frame (4) is provided with a slide groove structure; the wiring harness and pipeline docking module (5) is fixedly connected to the mechanical support frame (1) and the clamping support frame (3) is assembled on the upper part of the mechanical support frame (1) by bolts; the NVH test frame (4) is assembled on the protective cover above the clamping support frame (3) and the lower end of the NVH test frame (4) is provided with a slide groove structure; the wiring harness and pipeline docking module (5) is fixedly connected to the mechanical support frame (1) and the clamping support frame (3) is assembled on the upper part of the mechanical support frame (1) by bolts; the NVH test frame (4 ... The lifting docking frame (6) is arranged above the mechanical support frame (1), and a lifting hydraulic cylinder structure is arranged inside the lifting docking frame (6); the output loading support frame (7) is fixedly connected to the upper front end of the mechanical support frame (1); the transmission under test (8) is placed above the lifting docking frame (6); the protective mechanism is arranged above the mechanical support frame (1); the input drive mechanism is arranged above the input drive support frame (2); the clamping mechanism is arranged in front of the clamping support frame (3); the NVH test mechanism is arranged below the NVH test frame (4); the lifting docking mechanism is arranged above the lifting docking frame (6); the output loading mechanism is arranged above the output loading support frame (7); The clamping mechanism comprises: a clamping positioning plate (301), a clamping bolt (302), a clamping guide pin (303) and a clamping hydraulic cylinder (304); the clamping positioning plate (301) is fixedly connected to the front of the clamping support frame (3), and the transmission (8) to be tested cooperates with the clamping positioning plate (301) through a stop; the clamping bolts (302) are provided in multiple groups, and the multiple groups of clamping bolts (302) are respectively threadedly connected to the clamping positioning plate (301); the clamping guide pins (303) are provided in multiple groups, and the multiple groups of clamping guide pins (303) are respectively guided and connected to the front end of the clamping positioning plate (301); the clamping hydraulic cylinders (304) are provided in multiple groups, and the multiple groups of clamping hydraulic cylinders (304) are respectively fixedly connected to the inside of the clamping support frame (3).

2. A heavy-duty AMT transmission loaded offline test bench as claimed in claim 1, characterized in that: The protection mechanism comprises a protection cover (101); the protection cover (101) is fixedly connected to the upper part of the mechanical support frame (1); and a front end of the protection cover (101) is hinged with a plurality of door panel structures.

3. A heavy-duty AMT transmission loaded offline test bench as claimed in claim 1, characterized in that: The input drive mechanism comprises: an input drive motor (201), a first input coupling (202), a drive torque sensor adapter plate (203), a torque limiter (204), an input torque sensor (205), a second input coupling (206), a first input main shaft system (207), a first input main shaft component (208), a first clutch flywheel (209), a clutch pressure plate (210), a transition spline shaft (211), a release bearing component (212), a release bearing guide sleeve (213), a second input main shaft system end cover (214), a second input main shaft system (215), a second input main shaft component (216), a second clutch flywheel (217), and a clutch inner The pressing plate (218) is fixedly connected to the upper part of the input drive support frame (2); the first input coupling (202) is connected to the output shaft of the input drive motor (201) via a flat key; the driving torque sensor adapter plate (203) is fixedly connected to the first input coupling (202) via bolt locking and stopper positioning; the torque limiter (204) is fixedly connected to the driving torque sensor adapter plate (203) via bolt locking and stopper positioning; the input torque sensor (205) is fixedly connected to the torque limiter (204) via a flange; the second input coupling (206) is fixed to the input torque sensor (205) via bolts. The first input main shaft (207) is fixedly connected to the second input coupling (206) via a flat key; the first input main shaft (208) is coaxially fixedly connected to the front of the first input main shaft (207); the first clutch flywheel (209) is fixedly connected to the first input main shaft (208) via bolts, and the first clutch flywheel (209) is a 330 clutch flywheel structure; the clutch pressure plate (210) is fixedly connected to the front of the first clutch flywheel (209); the outer spline of the transition spline shaft (211) is connected to the inner spline of the clutch pressure plate (210) via a spline; the release bearing (212) is arranged above the mechanical support frame (1) The release bearing guide sleeve (213) and the release bearing member (212) are clearance-matched; the second input main shaft system end cover (214) is fixedly connected to the release bearing guide sleeve (213) by bolts; the second input main shaft system (215) is fixedly connected to the front end of the second input main shaft system end cover (214); the second input main shaft member (216) is coaxially fixedly connected to the inside of the second input main shaft system (215); the second clutch flywheel (217) is fixedly connected to the second input main shaft member (216) by bolts, and the second clutch flywheel (217) is a 430 clutch plate structure; the clutch internal pressure plate (218) is arranged inside the second clutch flywheel (217).

4. A heavy-duty AMT transmission loaded offline test bench as claimed in claim 3, characterized in that: The input drive mechanism comprises: a modified spline sleeve (219) and a transmission input shaft (220); the modified spline sleeve (219) is key-connected to the second clutch flywheel (217); the transmission input shaft (220) is spline-connected to the inner spline of the modified spline sleeve (219), and the transmission input shaft (220) is rotatably connected to the input end of the transmission (8) to be tested.

5. The heavy-duty AMT transmission loading off-line test bench according to claim 1, characterized in that: The NVH test mechanism comprises: a movable fixed plate (401), an NVH fixed plate (402), an X-axis electric cylinder (403), a Z-axis air cylinder (404), a pressure head mounting seat (405) and a vibration sensor (406); the movable fixed plate (401) is provided with multiple groups, and the multiple groups of movable fixed plates (401) are respectively slidably connected to the inside of the slide groove of the NVH test frame (4); the NVH fixed plate (402) is slidably connected to the bottom of the movable fixed plate (401); the X-axis electric cylinder (403) is fixedly connected to the left side of the NVH fixed plate (402); the Z-axis air cylinder (404) is fixedly connected to the left side of the push rod of the X-axis electric cylinder (403); the pressure head mounting seat (405) is fixedly connected to the bottom of the piston rod of the Z-axis air cylinder (404); and the vibration sensor (406) is fixedly connected to the bottom of the pressure head mounting seat (405).

6. The heavy-duty AMT transmission loaded offline test bench according to claim 1, characterized in that: The lifting and docking mechanism comprises: a lifting and docking tray (601); the lifting and docking tray (601) is fixedly connected above the lifting and docking frame (6); and the transmission (8) to be tested is placed above the lifting and docking tray (601).

7. The heavy-duty AMT transmission loaded offline test bench according to claim 1, characterized in that: The output loading mechanism comprises: an output loading motor (701), a first output loading coupling (702), a loading torque sensor adapter plate (703), a coupling component (704), an output torque sensor (705), a second output loading coupling (706), a loading main shaft system (707), a loading main shaft component (708), a loading press sleeve (709), a docking spline shaft (710) and an output transition plate (711); the output loading motor (701) is fixedly connected to the top of the output loading support frame (7); the first output loading coupling (702) is connected to the input shaft of the output loading motor (701) through a flat key; the loading torque sensor adapter plate (703) is connected to the first output loading motor (701) through bolt locking and stopper positioning. The coupling (702) is fixedly connected; the coupling component (704) is fixedly connected to the loading torque sensor adapter plate (703) by bolt locking and stop positioning; the output torque sensor (705) is fixedly connected to the coupling component (704) by bolts; the second output loading coupling (706) is fixedly connected to the output torque sensor (705) by bolts; the loading main shaft system (707) is fixedly connected to the rear end of the second output loading coupling (706); the loading main shaft component (708) is arranged at the rear end of the loading main shaft system (707), and the loading main shaft component (708) is transmission-connected to the second output loading coupling (706) by a flat key; the loading pressure sleeve (709) is flange-connected to the rear end of the loading main shaft component (708).

8. A heavy-duty AMT transmission loaded offline test bench as claimed in claim 7, characterized in that: The output loading mechanism comprises: the butt spline shaft (710) is key-connected to the rear end of the loading sleeve (709); the output transition disc (711) is connected to the output end of the transmission (8) to be tested, and the output transition disc (711) and the butt spline shaft (710) are spline-connected.

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