CN210427013U - Drive shaft system bench test device for car - Google Patents
Drive shaft system bench test device for car Download PDFInfo
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- CN210427013U CN210427013U CN201920471601.9U CN201920471601U CN210427013U CN 210427013 U CN210427013 U CN 210427013U CN 201920471601 U CN201920471601 U CN 201920471601U CN 210427013 U CN210427013 U CN 210427013U
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Abstract
The utility model discloses a drive shaft system bench test device for car, include: the device comprises a base, a temperature sensor, a control console, a driving motor mechanism and a load motor mechanism, wherein the driving motor mechanism and the load motor mechanism are respectively provided with an upper shaft clamp and a lower shaft clamp, an auxiliary shaft with universal joints at two ends is connected between the upper shaft clamps, and a Y-direction force sensor and a torque sensor are respectively arranged on the lower shaft clamps of the driving motor mechanism and the lower shaft clamps of the load motor mechanism; the bottom of the driving motor mechanism is sequentially provided with a rotating mechanism, an X-direction moving pair and a Y-direction moving pair from top to bottom; the bottom of load motor mechanism has set gradually X from top to bottom to removing vice, Y to removing vice, the utility model discloses can realize multinomial drive shaft performance parameter's analogue test high-efficiently accurately, practice thrift test time and cost, for design development and the performance test of constant speed drive shaft for the car, especially NVH performance verification provides effectual technical support.
Description
Technical Field
The utility model relates to a drive shaft system bench test device for car for measure each item performance parameter of drive shaft for the car, especially NVH performance parameter.
Background
The driving shaft of the constant velocity universal joint assembly is an important component of an automobile transmission device, coordinates the necessary traction force and the speed of an automobile under various driving conditions, and ensures that left and right driving wheels of the automobile can meet the differential requirement. The working performance and reliability of the automobile steering wheel directly affect the safety, stability and comfort of automobile driving, so that the automobile steering wheel must be subjected to strict performance test before use.
With the wide use of electric vehicles (the driving torque of the motor is large and can reach the maximum torque instantly) and large torque engines, the NVH problem of the vehicle caused by the driving shaft system is more and more prominent. With the continuous development of automobile technology, the importance of NVH performance in the research and development of automobiles is also continuously improved as an important evaluation index of the riding comfort of automobiles. Among various performance indexes of the automobile driving shaft, several indexes for measuring the performance of NVH are increasingly emphasized.
At present, the main constant-speed drive shaft test bench in China can only test a few performances of the drive shaft, such as circumferential clearance, Y-direction clearance, a slip curve and the like, and parameters representing NVH (noise, vibration and harshness) performances, such as Y-direction derived force, high-frequency slip resistance, complementary torque and the like, can not be tested, the quality of constant-speed universal joint assembly products can not be ensured, and the repeated development of the test bench and the waste of human resources can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at testing a test device of test drive shaft in order to test a plurality of drive shaft performance parameters including each item NVH performance index.
The utility model discloses the technical scheme who adopts as follows:
a drive shaft system bench test device for an automobile, comprising:
the upper end surface of the base is provided with two base Y-direction sliding grooves in parallel along the length direction;
the driving motor mechanism and the load motor mechanism are oppositely arranged on the upper end surface of the base, the driving motor mechanism and the load motor mechanism are respectively provided with an upper shaft clamp and a lower shaft clamp, an auxiliary shaft with universal joints at two ends is connected between the two shaft clamps at the upper part, and the two shaft clamps at the lower parts of the driving motor mechanism and the load motor mechanism are respectively provided with a Y-direction force sensor and a torque sensor; the bottom of the driving motor mechanism is sequentially provided with a rotating mechanism around a Z axis, an X-direction moving pair vertical to the Y-direction chute of the base and a Y-direction moving pair moving along the Y-direction chute of the base from top to bottom; an X-direction moving pair vertical to the Y-direction chute of the base and a Y-direction moving pair moving along the Y-direction chute of the base are sequentially arranged at the bottom of the load motor mechanism from top to bottom;
a temperature sensor arranged in the vicinity of the universal joint of the drive shaft and the auxiliary shaft for monitoring a temperature change of the universal joint;
and the console is in signal connection with the driving motor mechanism, the load motor mechanism, the temperature sensor, the Y-direction force sensor and the torque sensor respectively.
Furthermore, the driving motor mechanism sequentially comprises a driving motor box, a driving motor box base and a driving motor base from top to bottom, wherein a driving motor is arranged in the driving motor box, and the driving motor is respectively in power connection with a driving motor box end auxiliary shaft coupling interface and a driving motor box end constant velocity universal joint interface which are replaceably arranged on the driving motor box; a driving motor base X-direction guide rail which is in sliding fit with the X-direction sliding groove at the bottom of the driving motor box base is arranged on the top surface of the driving motor base in parallel along the X direction; a driving motor base Y-direction guide rail which is in sliding fit with the base Y-direction sliding groove is arranged on the bottom surface of the driving motor base in parallel along the Y direction; and a driving motor box reinforcing rib is arranged at the joint of the driving motor box and the driving motor box base.
Further, load motor mechanism from top to bottom include in proper order: the load motor is respectively in power connection with a load motor box end auxiliary shaft coupling interface and a load motor box end constant-speed universal coupling interface which are replaceably arranged on the load motor box; the upper-layer load motor box base is rotationally connected with the lower-layer load motor box base through a load motor rotating shaft system, and an angle sensor is arranged on a rotating shaft of the load motor rotating shaft system; the top surface of the load motor base is provided with a load motor base X-direction guide rail which is in sliding fit with the X-direction sliding groove at the bottom of the lower layer load motor box base in parallel along the X direction; a Y-direction guide rail of the load motor base in sliding fit with the Y-direction chute of the base is arranged at the bottom of the load motor base in parallel along the Y direction; and a load motor box reinforcing rib is arranged at the joint of the load motor box and the upper layer load motor box base.
Furthermore, positioning bolts for positioning are also arranged on the load motor base and the drive motor base; each sliding groove is a T-shaped sliding groove, the positioning bolt is a T-shaped bolt, and the T-shaped bolt is matched with the T-shaped sliding groove.
Furthermore, two Y-direction sliding grooves of the two bases on the base are internally provided with limiting blocks for limiting Y-direction strokes of the driving motor mechanism and the load motor mechanism, and the two sides of all the X-direction guide rails are respectively provided with limiting blocks for preventing the driving shaft from being damaged due to too large stretching or extrusion of the driving shaft caused by too large Y-direction strokes and preventing the driving shaft and the auxiliary shaft from being damaged due to the fact that X-direction movement exceeds an allowable range.
Further, air springs are respectively mounted at four corners of the bottom of the base to serve as supports, so that the influence of self vibration on the ground during long-time operation of the test bed is reduced.
Further, the auxiliary shaft comprises a solid shaft and a sleeve, and a plurality of rings of balls are arranged on an inner ring of the sleeve along the radial direction and form an axial sliding pair with the outer diameter of the solid shaft. In order to match with driving shafts with different shaft lengths, the solid shaft and the sleeve are respectively provided with models with different lengths, and the size of the interfaces is the same, so that the solid shaft and the sleeve can be matched in pairs.
Further, the load motor rotating shaft system comprises a lead screw driven by a motor, and the lead screw drives the upper-layer load motor box to rotate around a Z axis in a set range in a horizontal plane through a swing arm connected with the upper-layer load motor box.
Compared with the prior art, the utility model has the technical effects that:
the utility model discloses a driving motor and load motor realize the simulation to the input state of drive shaft under the true operating mode, can realize multinomial drive shaft performance parameter's experiment high-efficiently accurately, practice thrift experimental time and cost. Meanwhile, a data processing method is given by taking axial derived force as an example, and effective technical support is provided for design development and performance test of the constant-speed driving shaft for the automobile, particularly NVH performance verification.
Drawings
FIG. 1 is a front view of the working principle of a drive shaft system test device;
FIG. 2 is a top view of the principle of operation of the drive shaft system test apparatus;
FIG. 3 is a three-dimensional schematic view of a drive shaft system test rig;
FIG. 4 is a three-dimensional schematic view of a drive motor portion of the drive shaft system test apparatus;
FIG. 5 is a front view of a drive motor portion of the drive shaft system test apparatus;
FIG. 6 is a side view of a drive motor portion of the drive shaft system test rig;
FIG. 7 is a top view of a drive motor portion of the drive shaft system test apparatus;
FIG. 8 is a three-dimensional schematic view of the load motor portion of the drive shaft system test apparatus;
FIG. 9 is a front view of the load motor portion of the drive shaft system test apparatus;
FIG. 10 is a side view of the load motor portion of the drive shaft system test apparatus;
FIG. 11 is a side view of the load motor portion of the drive shaft system test apparatus;
the reference numbers illustrate:
1-driving motor mechanism, 2-Y direction force sensor, 3-first constant velocity universal joint, 4-second constant velocity universal joint, 5-torque sensor, 6-load motor mechanism, 7-driving shaft, 8-shaft inclination angle, 9-swing angle, 10-auxiliary shaft, 11-base and 12-base Y direction sliding groove; 1-1-driving motor box, 1-2-driving motor box end auxiliary shaft coupling interface, 1-3-driving motor box end constant velocity universal joint interface, 1-4-driving motor box reinforcing rib, 1-5-driving motor box base, 1-6-driving motor base X-direction guide rail and 1-7-driving motor base; 6-1-load motor box, 6-2-load motor box end auxiliary shaft coupling interface, 6-3-load motor box end constant velocity universal joint interface, 6-4-load motor box reinforcing rib, 6-5-load motor rotating shaft system, 6-6-angle sensor, 6-7-upper layer load motor box base; 6-8-lower layer load motor box seat; 6-9-load motor base X-direction guide rail; 6-10-load motor base.
Detailed Description
For a better understanding of the present invention, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, a drive shaft system bench test apparatus for an automobile includes:
the upper end surface of the base 11 is provided with two base Y-direction sliding grooves 12 in parallel along the length direction;
the driving motor mechanism 1 and the load motor mechanism 6 are oppositely arranged on the upper end surface of the base 11, the driving motor mechanism 1 and the load motor mechanism 6 are both provided with an upper shaft clamp and a lower shaft clamp, an auxiliary shaft 10 with universal joints at two ends is connected between the upper two shaft clamps, and the two shaft clamps at the lower parts of the driving motor mechanism and the load motor mechanism are respectively provided with a Y-direction force sensor 2 and a torque sensor 5; the bottom of the driving motor mechanism 1 is sequentially provided with a rotating mechanism around a Z axis, an X-direction moving pair vertical to the Y-direction chute 12 of the base and a Y-direction moving pair moving along the Y-direction chute 12 of the base from top to bottom; an X-direction moving pair vertical to the base Y-direction chute 12 and a Y-direction moving pair moving along the base Y-direction chute 12 are sequentially arranged at the bottom of the load motor mechanism 6 from top to bottom;
a temperature sensor arranged in the vicinity of the universal joint of the drive shaft and the auxiliary shaft for monitoring a temperature change of the universal joint;
and the control console is in signal connection with the driving motor mechanism 1, the load motor mechanism 6, the temperature sensor, the Y-direction force sensor 2 and the torque sensor respectively.
The Y-direction displacement of the driving motor mechanism 1 and the load motor mechanism 6 is convenient for the replacement and installation of the auxiliary shaft and the driving shaft; the X-direction displacement of the driving motor mechanism 1 and the load motor mechanism 6 can realize the adjustment of the Y-direction angle 8. In the working process, the driving motor mechanism 1 and the load motor mechanism 6 can provide corresponding rotating speed and torque input for the driving shaft according to signals of the control console, and simultaneously control the inclination angle and the swing angle of the shaft so as to simulate the real working condition of the driving shaft 7. Real-time test data can be obtained through data recorded by sensors such as axial force sensors, torque sensors and the like.
As shown in fig. 4-6, the driving motor mechanism 1 sequentially includes a driving motor box 1-1, a driving motor box base 1-5, and a driving motor base 1-7 from top to bottom, a driving motor is disposed in the driving motor box 1-1, the driving motor is respectively in power connection with a driving motor box end auxiliary shaft joint interface 1-2 and a driving motor box end constant velocity universal joint interface 1-3, which are replaceably disposed on the driving motor box 1-1, and the Y-direction position and the radial direction interface size can be adjusted to adapt to driving shaft constant velocity universal joints of different models.
The top surface of the driving motor base 1-7 is provided with a driving motor base X-direction guide rail 1-6 which is in sliding fit with the X-direction chute at the bottom of the driving motor box base 1-5 in parallel along the X direction; a driving motor base Y-direction guide rail which is in sliding fit with the base Y-direction sliding groove 12 is arranged on the bottom surface of the driving motor base 1-7 in parallel along the Y direction; and a driving motor box reinforcing rib 1-4 is arranged at the joint of the driving motor box 1-1 and the driving motor box base 1-5, so that the load capacity of the joint is increased, and the service life of the machine is prolonged. The drive motor can provide excitation with small amplitude (more than 30Hz and less than 0.1mm) of Y-direction high frequency for the drive shaft, and is used for providing input conditions of a high-frequency slip resistance test. The driving motor box 1-1 integrates a driving motor and a signal circuit, is connected with the console, can receive the console signal to control the rotating speed of the driving shaft 7, and can also transmit the signal of the sensor to the console in real time.
As shown in fig. 8-11, the load motor mechanism 6 sequentially includes from top to bottom: the load motor is respectively in power connection with a load motor box end auxiliary shaft joint interface 6-2 and a load motor box end constant-velocity universal joint interface 6-3 which are replaceably arranged on the load motor box 6-1, and the Y-direction position and the radial interface size can be adjusted to adapt to different types of drive shaft constant-velocity universal joints. The upper-layer load motor box seat 6-7 is rotatably connected with the lower-layer load motor box seat 6-8 through a load motor rotating shaft system 6-5, an angle sensor 6-6 is arranged on a rotating shaft of the load motor rotating shaft system 6-5, and the angle sensor 6-6 can detect the size of an actual rotating angle to ensure the angle control precision. The top surface of the load motor base 6-10 is provided with a load motor base X-direction guide rail 6-9 which is in sliding fit with the X-direction chute at the bottom of the lower layer load motor box base 6-8 in parallel along the X direction; the bottom of the load motor base 6-10 is provided with a load motor base Y-direction guide rail which is in sliding fit with the base Y-direction chute 12 in parallel along the Y direction; and a load motor box reinforcing rib 6-4 is arranged at the joint of the load motor box 6-1 and the upper layer load motor box base 6-7, so that the load capacity of the joint is increased, and the service life of the machine is prolonged. The rotation angle of the load motor in the horizontal plane can meet the condition that a swing angle 9 exists at one end of the medium-speed driving shaft in part of tests. The load motor box 6-1 integrates a driving motor and a signal circuit, is connected with the console, can receive the console signal to control the rotating speed of the driving shaft, and can also transmit the signal of the sensor to the console in real time. Through the three pairs of moving pairs, the load motor 6 can drive the constant-speed universal joint close to the load motor end to realize displacement in the Y direction and the X direction and rotation in a certain angle around the Z axis in a horizontal plane.
Preferably, the load motor base 6-10 and the drive motor base 1-7 are also provided with positioning bolts for positioning; each sliding groove is a T-shaped sliding groove, the positioning bolt is a T-shaped bolt, and the T-shaped bolt is matched with the T-shaped sliding groove.
Preferably, the two Y-direction chutes 12 of the base 11 are provided with stoppers for limiting the Y-direction strokes of the driving motor mechanism 1 and the load motor mechanism 6, and both sides of all the X-direction guide rails are provided with stoppers for respectively preventing the driving shaft from being damaged due to the too large Y-direction stroke by stretching or squeezing, and preventing the driving shaft and the auxiliary shaft from being damaged due to the X-direction movement exceeding the allowable range.
Preferably, air springs are respectively arranged at four corners of the bottom of the base 11 as supports so as to reduce the influence of self vibration on the ground during long-time operation of the test bed.
Preferably, the auxiliary shaft 10 comprises a solid shaft and a sleeve, and a plurality of circles of balls are arranged on an inner ring of the sleeve along the radial direction to form an axial sliding pair with the outer diameter of the solid shaft. In order to match with driving shafts with different shaft lengths, the solid shaft and the sleeve are respectively provided with 4 models with different lengths, and the size of the interfaces is the same and can be matched in pairs.
Preferably, the load motor rotating shaft system 6-5 comprises a motor-driven lead screw, and the lead screw drives the upper layer load motor box 6-7 to rotate around a Z axis in a set range in a horizontal plane through a swing arm connected with the upper layer load motor box 6-7.
The utility model designs and manufactures the driving motor part, the load motor part and the base of the testing device respectively, and ensures that the movement of the two motors can simulate various working conditions of the driving shaft in the working process; through control center to input rotational speed, load moment of torsion, axle inclination or pivot angle adjust with the input condition of drive shaft in the real operating mode match, measure corresponding parameter size through the sensor, save data to further processing, specifically:
1) the working and control principle of the driving motor is as follows:
the Y-direction displacement and the X-direction displacement of the constant-speed universal joint at the end of the driving motor can be realized according to signals input by the control console so as to adjust the inclination angle of the shaft, provide constant rotating speed input and simulate the rotating speed condition of the driving shaft in real working conditions.
2) The working and control principle of the load motor is as follows:
the Y-direction displacement, the X-direction displacement and the rotation angle within a certain range in a horizontal plane of the constant-speed universal joint at the end of the load motor can be realized according to signals input by the control console so as to adjust the inclination angle and the swing angle of the shaft, provide constant torque load and simulate the torque condition of the driving shaft in real working conditions.
3) The function of each sensor:
the axial force sensor is arranged at the end close to the driving motor and used for measuring the magnitude of the axial force in tests of axial derived force, sliding resistance, high-frequency sliding resistance and the like. The torque sensor is arranged at the load motor end and used for measuring the torque generated by the universal joint in starting torque, complementary torque and other tests. The temperature sensor is arranged near the universal joint of the main shaft and the auxiliary shaft, monitors temperature change and provides signals for opening and closing the cooling fan.
The utility model discloses a displacement of driving motor and load motor self and for the input condition that the constant speed drive shaft provided for the car, realize the simulation to the input state (rotational speed, load moment of torsion, axle inclination etc.) of drive shaft under the true operating mode, can realize the experiment of multinomial drive shaft performance parameter high-efficiently accurately, practice thrift experimental time and cost. Meanwhile, a data processing method is given by taking Y-direction derived force as an example.
The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the following claims. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a drive shaft system bench test device for car which characterized in that includes:
the upper end surface of the base (11) is provided with two base Y-direction sliding grooves (12) in parallel along the length direction;
the driving motor mechanism (1) and the load motor mechanism (6) are oppositely arranged on the upper end face of the base (11), the driving motor mechanism (1) and the load motor mechanism (6) are respectively provided with an upper shaft clamp and a lower shaft clamp, an auxiliary shaft (10) with universal joints at two ends is connected between the upper shaft clamp and the lower shaft clamp, and a Y-direction force sensor (2) and a torque sensor (5) are respectively arranged on the lower shaft clamps of the driving motor mechanism and the load motor mechanism; the bottom of the driving motor mechanism (1) is sequentially provided with a rotating mechanism around a Z axis, an X-direction moving pair vertical to the Y-direction chute (12) of the base and a Y-direction moving pair moving along the Y-direction chute (12) of the base from top to bottom; an X-direction moving pair vertical to the Y-direction chute (12) of the base and a Y-direction moving pair moving along the Y-direction chute (12) of the base are sequentially arranged at the bottom of the load motor mechanism (6) from top to bottom;
a temperature sensor arranged in the vicinity of the universal joint of the drive shaft and the auxiliary shaft for monitoring a temperature change of the universal joint;
and the console is in signal connection with the driving motor mechanism (1), the load motor mechanism (6), the temperature sensor, the Y-direction force sensor (2) and the torque sensor respectively.
2. The bench test device for the driving shaft system for the automobile according to claim 1, wherein the driving motor mechanism (1) comprises a driving motor box (1-1), a driving motor box base (1-5) and a driving motor base (1-7) from top to bottom in sequence, a driving motor is arranged in the driving motor box (1-1), and the driving motor is respectively in power connection with a driving motor box end auxiliary shaft joint interface (1-2) and a driving motor box end constant velocity universal joint interface (1-3) which are replaceably arranged on the driving motor box (1-1); the top surface of the driving motor base (1-7) is provided with a driving motor base X-direction guide rail (1-6) which is in sliding fit with the X-direction chute at the bottom of the driving motor box base (1-5) along the X direction in parallel; a driving motor base Y-direction guide rail which is in sliding fit with the base Y-direction sliding groove (12) is arranged on the bottom surface of the driving motor base (1-7) in parallel along the Y direction; and a driving motor box reinforcing rib (1-4) is arranged at the joint of the driving motor box (1-1) and the driving motor box base (1-5).
3. The bench test device for the driving shaft system for the automobile as claimed in claim 2, wherein the load motor mechanism (6) comprises, in order from top to bottom: the load motor box comprises a load motor box (6-1), an upper layer load motor box base (6-7), a lower layer load motor box base (6-8) and a load motor base (6-10), wherein a load motor is arranged in the load motor box (6-1), and the load motor is respectively in power connection with a load motor box end auxiliary shaft coupling interface (6-2) and a load motor box end constant-speed universal coupling interface (6-3) which are arranged on the load motor box (6-1) in a replaceable manner; the upper-layer load motor box base (6-7) is rotatably connected with the lower-layer load motor box base (6-8) through a load motor rotating shaft system (6-5), and an angle sensor (6-6) is arranged on a rotating shaft of the load motor rotating shaft system (6-5); the top surface of the load motor base (6-10) is provided with a load motor base X-direction guide rail (6-9) which is in sliding fit with the X-direction sliding groove at the bottom of the lower layer load motor box base (6-8) in parallel along the X direction; the bottom of the load motor base (6-10) is provided with a load motor base Y-direction guide rail which is in sliding fit with the base Y-direction sliding groove (12) in parallel along the Y direction; and a load motor box reinforcing rib (6-4) is arranged at the joint of the load motor box (6-1) and the upper layer load motor box base (6-7).
4. The bench test device for the driving shaft system for the automobile as claimed in claim 3, wherein the load motor bases (6-10) and the driving motor bases (1-7) are further provided with positioning bolts for positioning; each sliding groove is a T-shaped sliding groove, the positioning bolt is a T-shaped bolt, and the T-shaped bolt is matched with the T-shaped sliding groove.
5. The bench test device for the driving shaft system for the automobile as claimed in claim 3, wherein the two base Y-direction chutes (12) on the base (11) are provided with limit blocks for limiting the Y-direction strokes of the driving motor mechanism (1) and the load motor mechanism (6), and the two sides of all the X-direction guide rails are provided with limit blocks.
6. The bench test device of the driving shaft system for the automobile as claimed in claim 1, wherein air springs are respectively installed at four corners of the bottom of the base (11) as supports to reduce the influence of self-vibration on the ground during the long-term operation of the test bench.
7. Bench test rig for a drive shaft system for motor vehicles according to claim 1, characterised in that the secondary shaft (10) comprises a solid shaft and a sleeve, the inner ring of which has a number of rings of balls arranged radially, forming an axial sliding pair with the outer diameter of the solid shaft.
8. The bench test device for the driving shaft system for the automobile as recited in claim 3, characterized in that the load motor rotating shaft system (6-5) comprises a motor-driven lead screw, and the lead screw drives the upper load motor box base (6-7) to rotate around the Z axis in a set range in a horizontal plane through a swing arm connected with the upper load motor box base (6-7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920471601.9U CN210427013U (en) | 2019-04-09 | 2019-04-09 | Drive shaft system bench test device for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920471601.9U CN210427013U (en) | 2019-04-09 | 2019-04-09 | Drive shaft system bench test device for car |
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| CN210427013U true CN210427013U (en) | 2020-04-28 |
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| CN201920471601.9U Expired - Fee Related CN210427013U (en) | 2019-04-09 | 2019-04-09 | Drive shaft system bench test device for car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031237A (en) * | 2019-04-09 | 2019-07-19 | 华南理工大学 | A kind of automobile drive axle systems bench test device and method |
-
2019
- 2019-04-09 CN CN201920471601.9U patent/CN210427013U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031237A (en) * | 2019-04-09 | 2019-07-19 | 华南理工大学 | A kind of automobile drive axle systems bench test device and method |
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Granted publication date: 20200428 |