CN106596026B - Automobile collapsing steering column impact test device and test method - Google Patents
Automobile collapsing steering column impact test device and test method Download PDFInfo
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- CN106596026B CN106596026B CN201611122333.7A CN201611122333A CN106596026B CN 106596026 B CN106596026 B CN 106596026B CN 201611122333 A CN201611122333 A CN 201611122333A CN 106596026 B CN106596026 B CN 106596026B
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- 238000009863 impact test Methods 0.000 title claims abstract description 24
- 238000010998 test method Methods 0.000 title description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 73
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
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- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention provides an impact test device for a crumple steering column of an automobile, which comprises a bracket, wherein a lifting frame is arranged on the bracket, the lifting frame is connected with a driving device, the driving device drives the lifting frame to move up and down along the vertical direction, the lower end of the lifting frame is connected with an impact module through a locking and releasing mechanism, an energy-absorbing sliding device is arranged below the impact module and connected with the bracket, a fixing device for fixing the steering column to be tested is arranged below the energy-absorbing sliding device, the energy-absorbing sliding device comprises an energy-absorbing mechanism and a sliding mechanism, when an impact occurs, the energy-absorbing mechanism can absorb part of energy generated during the impact, and the sliding mechanism can move in the vertical and horizontal directions. The test device has the advantages of compact structure, strong field adaptability, high reliability, simple and convenient operation, strong pertinence, practicability and effectiveness and low test cost.
Description
Technical Field
The invention relates to the field of automobile safety test, in particular to an automobile crumple steering column impact test device and a test method by adopting the test device.
Background
Along with the improvement of the living standard of people, automobiles become a commonly used riding instead of walking tool in daily life, along with the increase of the number of automobiles, the safety of the automobiles is also more and more paid attention to, and strict regulation requirements are formulated for the safety of drivers and passengers so as to ensure the safety of the automobiles.
When an automobile is in an accident, particularly in a front collision, a driver often leans forward due to a strong stopping effect, the head and the chest of a human body collide with a steering wheel, and in order to reduce the impact force born by the head and the chest of the driver impacted by the steering column, some automobiles design the steering column to be in two-to-three-section crumple and fold due to external extrusion during the collision, so that a certain buffer distance is formed, the impact acting time is prolonged, and the damage to the human body during the collision is reduced.
The international automobile-developed countries have regulatory requirements for preventing the steering column from injuring the driver, such as the U.S. safety regulations FMVSS203,204, the national safety regulations GB11557, the national european economic committee's safety regulations ECE R12, etc. These regulations specify the requirements of the amount of rearward horizontal displacement of the steering column and the collision force in the event of a frontal collision of the vehicle. Therefore, the crush displacement of the crush type steering column when the crush type steering column is subjected to a certain impact and the impact force received in the crush process are important performance indexes for judging whether the product is qualified or not.
There is no test equipment or test method specific to the collapsed steering column in the existing standard or technology. Patent document EP1160560B1 discloses an impact simulation device for an automotive steering column, which simulates the reverse force of the steering column on an impact object when the steering column is impacted and the stress condition of the steering column mounting part during the impact, and cannot well simulate the change of force and displacement under the situation of collapse of the steering column. At present, the method for simulating the collapse of the steering column mostly adopts the traditional method of real vehicle impact or horizontal traction impact, and the method accords with the actual working condition, but has higher requirements on test sites, higher test cost and more complex operation, and has weak pertinence, poor site adaptability and poor economy for research and development of the collapse steering column and factory batch spot inspection, so that the detection quality of the tested steering column is influenced, and hidden danger is possibly brought to the safety quality of the whole vehicle. Aiming at the problems, it is necessary to design a test device which has strong pertinence and good economy and is convenient for an automobile manufacturer or a scientific research institution to carry out the impact test of the automobile collapsing steering column.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a test device which is highly targeted, economical, and dedicated to impact testing of a crush steering column of an automobile.
In order to achieve the above and other related objects, the present invention provides an impact test device for a crash-type steering column of an automobile, comprising a bracket, wherein a lifting frame is arranged on the bracket, the lifting frame is connected with a driving device, the driving device drives the lifting frame to move up and down along a vertical direction, the lower end of the lifting frame is connected with an impact module through a locking release mechanism, an energy-absorbing sliding device is arranged below the impact module, the energy-absorbing sliding device is connected with the bracket, a fixing device for fixing the steering column to be tested is arranged below the energy-absorbing sliding device, the energy-absorbing sliding device comprises an energy-absorbing mechanism and a sliding mechanism, when an impact occurs, the energy-absorbing mechanism can absorb part of energy generated during the impact, and the sliding mechanism can move in vertical and horizontal directions.
Preferably, the bracket and the fixing device are fixed on a bottom plate.
Preferably, a guiding mechanism is further arranged on the support, the lifting frame and the impact module are connected with the guiding mechanism, and the guiding direction of the guiding mechanism is parallel to the transmission direction of the driving device.
Preferably, the guiding mechanism is a guide rail sliding block mechanism or a guide pillar and guide sleeve mechanism.
Preferably, the sliding mechanism comprises a longitudinal sliding mechanism and a transverse sliding mechanism, the longitudinal sliding mechanism comprises a longitudinal sliding rail, a first longitudinal sliding block is arranged on the longitudinal sliding rail and is in sliding connection with the longitudinal sliding rail, the transverse sliding mechanism comprises a transverse sliding rail, the transverse sliding rail is connected with the first longitudinal sliding block, the transverse sliding rail is provided with a transverse sliding block, the transverse sliding block is provided with a hinge mechanism used for being connected with a steering column to be tested, the energy absorbing mechanism comprises an air spring, and the air spring is positioned on the first longitudinal sliding block.
Preferably, the energy absorption sliding device further comprises a force transmission frame, the force transmission frame is located on a second longitudinal sliding block, the second longitudinal sliding block is in sliding connection with the longitudinal sliding rail, the second longitudinal sliding block is located above the first longitudinal sliding block, and the air spring is located between the first longitudinal sliding block and the second longitudinal sliding block.
Preferably, the energy absorbing mechanism further comprises a hydraulic buffer connected with the bracket, and the hydraulic buffer is arranged below the impact module.
Preferably, the impact module is provided with a hollow cavity for placing the mass block.
Preferably, the automobile collapsing steering column impact test device further comprises a data acquisition system, wherein the data acquisition system comprises a set of triaxial force sensor, a set of speed acquisition device, a set of high-speed shooting displacement acquisition device and a set of data acquisition analysis device; the three-axial force sensor is used for collecting forces generated in three directions of a tested steering column during a test, and the speed collecting device is used for collecting initial speed of the impact module during the test when the impact module collides with the energy-absorbing sliding device; the high-speed camera shooting displacement acquisition device is used for acquiring displacement of the tested steering column which collapses during the test.
The invention also discloses a method for performing impact test by adopting the automobile crumple steering column impact test device, which comprises the following steps:
1) Fixedly mounting a steering column to be tested on the fixing device according to a specified position, and simultaneously sliding and hinging the upper end of the steering column to be tested with the energy-absorbing sliding device;
2) Starting the driving device to enable the lifting frame to drive the impact module to vertically rise to a specified height and hover;
3) The locking release mechanism arranged between the lifting frame and the impact module acts to enable the impact module to be separated from the lifting frame, freely fall down and impact the energy-absorbing sliding device, so that the tested steering column which is in sliding hinge connection with the energy-absorbing sliding device is collapsed under the action of impact energy;
4) The acquisition system displays and stores the force, speed and displacement data acquired in the test process.
As described above, the impact test device and the test method for the automotive crumple steering column have the following beneficial effects: the impact test device for the automobile collapsing steering column adopts a vertical falling mode to enable the impact module to impact the energy-absorbing sliding device to simulate the working condition of the automobile steering column when the automobile steering column is impacted. The initial impact speed is obtained through the impact of the impact block, the energy absorption effect of the safety airbag and the safety belt during frontal impact of the automobile is simulated through the energy absorption mechanism in the energy absorption sliding device, the continuous stress and free collapse of the automobile steering column in the collapse process are ensured through the sliding mechanism, so that the working condition of the automobile steering column when impacted can be simulated very truly, and meanwhile, the speed, displacement and other parameters during impact can be detected very conveniently. The test device has the advantages of compact structure, strong field adaptability, high reliability, simple and convenient operation, strong pertinence, practicability and effectiveness and low test cost.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present invention.
FIG. 2 is a partial schematic view of an embodiment of the present invention
Description of element numbers:
1. a bottom plate; 2. A bracket; 3. a driving device; 4. a guide mechanism; 5. a lifting frame; 6. an impact module; 61. striking the hammer head; 62. a hollow cavity; 7. an energy absorbing slip device; 70. a guide limiting block; 71. a longitudinal slide rail; 72. a first longitudinal slide; 73. a second longitudinal slide; 74. an air spring; 75. a transverse slide rail; 76. a transverse slide block; 77. a sliding hinge, a 78 force transmission frame, 79 and a hydraulic buffer; 8. a fixing device; 9. a steering column to be tested.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 and 2. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
As shown in fig. 1, the invention provides an impact test device for a crumple steering column of an automobile, which mainly comprises a bracket 2, a lifting frame 5, a driving device 3, an impact module 6, an energy-absorbing side-shifting device 7, a fixing device 8 and a signal acquisition system. The support 2 is a structural component, and the internal connection mode can adopt a welding or threaded connection mode. The driving device 3 is fixed on the bracket 2, the lifting frame 5 is connected with the driving device 3, and the lifting frame 5 can be driven to move upwards in the vertical direction through the driving device 3. As a specific implementation manner, the driving device 3 comprises a power element and a transmission element, and the driving device 3 can be an electric driving device formed by a motor and a screw rod, a hydraulic driving device formed by an oil source and an oil cylinder, or an air pressure driving device formed by an air source and an air cylinder.
The lower extreme and the striking module 6 of hoisting frame 5 are connected, and hoisting frame 5 and striking module 6 pass through a locking release mechanism to be connected, and when striking module 6 needs to promote, locking release mechanism can link together hoisting frame 5 and striking module 6, makes striking module 6 rise along with hoisting frame 5 simultaneously, and when rising to certain height, locking release mechanism opens and can make striking module 6 and hoisting frame 5 break away from, makes striking module 6 can freely fall. The locking and releasing mechanism can adopt electromagnetic type, hydraulic type or pneumatic type, and can realize locking or releasing according to instructions.
The energy-absorbing sliding device 7 is positioned below the impact module 6, and can collide with the energy-absorbing sliding device 7 when the impact module 6 falls off freely. The energy-absorbing sliding device 7 is connected with the bracket 2, a fixing device 8 for fixing the steering column 9 to be tested is arranged below the energy-absorbing sliding device, the steering column 9 to be tested is fixed on the fixing device 8 during test, and the steering column 9 to be tested is in sliding hinge joint with the energy-absorbing sliding device 7. The energy-absorbing slip device 7 comprises an energy-absorbing mechanism and a slip mechanism, when the impact module 6 and the energy-absorbing slip device 7 are impacted, the energy-absorbing mechanism can absorb part of energy generated during the impact, and the slip mechanism can move in the vertical and horizontal directions.
As a preferred embodiment, the bracket 2 and the fixing device 8 are both fixed on a bottom plate 1, and the fixing device 8 is adjustable in position in the horizontal direction of the bottom plate 1, so that when the tested steering column 9 is mounted on the fixing device 8, a certain included angle is formed between the axial direction of the tested steering column 9 and the vertical direction, and the actual working condition of the tested steering column 9 when the vehicle is used can be simulated more truly, thereby enabling test data to be more accurate.
As another preferred embodiment, the test device may further be provided with a guiding mechanism 4, wherein the lifting frame 5 and the impact module 6 are slidably connected with the guiding mechanism 4, and the guiding direction of the guiding mechanism 4 is parallel to the transmission direction of the driving device. Therefore, the impact process can be ensured to be forward impact, and the test data can be more accurate. The guide mechanism 4 can adopt a guide rail sliding block mechanism or a guide pillar and guide sleeve mechanism.
The sliding mechanism of the energy-absorbing sliding device 7 comprises a longitudinal sliding mechanism and a transverse sliding mechanism, wherein the longitudinal sliding mechanism comprises a longitudinal sliding rail 71, a first longitudinal sliding block 72 is arranged on the longitudinal sliding rail 71, and the first longitudinal sliding block 72 is in sliding connection with the longitudinal sliding rail 71. The transverse sliding mechanism comprises a transverse sliding rail 75, the transverse sliding rail 75 is connected with the first longitudinal sliding block 72, a transverse sliding block 76 is arranged on the transverse sliding rail 75, and a hinge mechanism for connecting with the steering column 9 to be tested is arranged on the transverse sliding block 76, and as a specific implementation mode, a rotary hinge 77 can be adopted as the hinge mechanism. The energy absorbing mechanism of the energy absorbing slip device 7 comprises an air spring 74, the air spring 74 being located on said first longitudinal slide.
In order to concentrate the force transmission more, the energy-absorbing sliding device further comprises a force transmission frame 78, wherein the force transmission frame 78 is positioned on the second longitudinal sliding block 73, the second longitudinal sliding block 73 is in sliding connection with the longitudinal sliding rail 71, the second longitudinal sliding block 73 is positioned above the first longitudinal sliding block 72, the air spring 74 is positioned between the first longitudinal sliding block 72 and the second longitudinal sliding block 73, and a guiding limiting block is further arranged between the first longitudinal sliding block 72 and the second longitudinal sliding block 73. The energy-absorbing mechanism further comprises a hydraulic buffer 79, the hydraulic buffer 79 being connected to the bracket 2, the hydraulic buffer 79 being arranged below the impact module.
With the energy absorption sliding device 7 with the structure, when the impact module 6 freely falls and collides with the energy absorption sliding device, impact force is transmitted to the air spring 74 through the force transmission frame 78 and the second longitudinal sliding block 73, so that the air spring 74 can absorb part of impact energy to simulate the absorption of the energy of the automobile safety airbag during collision. The rest impact force can act on the tested steering column 9 to enable the tested steering column 9 to collapse and move, the sliding mechanism can enable the tested steering column 9 to collapse and move freely in the horizontal direction and the vertical direction, the collapse of the tested steering column 9 cannot be hindered, and the state of the tested steering column 9 in collision can be simulated more truly. As the crash module 6 falls, the crash module 6 and the hydraulic buffer 79, the hydraulic buffer 79 further absorbs the energy of the crash to simulate the energy absorption of the car seat belt during the crash. Thus, when installed, the height of the hydraulic damper 79 should be lower than the height of the force transmission frame 78, and the height of the hydraulic damper 79 is freely adjustable on the support 2.
In order to reduce the influence of the weight of the force transmission frame 78 on the test accuracy on the basis of ensuring the rigidity of the force transmission frame, the force transmission frame 78 may be provided in a cylindrical hollow structure. A striker ram 61 can be provided on the striker module 6 in correspondence with the position of the force transmission frame 78. A hollow cavity 62 can be arranged on the impact module 6, a mass block is placed in the hollow cavity 62, and the mass block with different mass can be placed in the hollow cavity 62 according to the requirements of different test standards during each test.
The data acquisition system is mainly used for acquiring test data and mainly comprises a set of triaxial force sensor, a set of speed acquisition device, a set of high-speed shooting displacement acquisition device and a set of data acquisition analysis device. The triaxial force sensor is mounted on the steering column 9 to be tested for collecting forces generated in three directions of the steering column 9 to be tested during the test. The speed acquisition device is arranged on the bracket 2 and is used for acquiring the initial speed of the impact module 6 during the test when the impact module collides with the energy absorption sliding device 7. The high-speed camera shooting displacement acquisition device is stably placed on the horizontal ground, forms a certain distance with the bottom plate 1 and the bracket 2 and is used for acquiring displacement of the tested steering column collapsing during a test. The collected data can be stored in a computer for display, analysis and storage.
The method for performing impact test by adopting the impact test device for the automotive crumple steering column mainly comprises the following steps:
1) Fixedly mounting a steering column 9 to be tested on a fixing device 8 according to a specified position, and simultaneously sliding and hinging the upper end of the steering column 9 to be tested with an energy absorption sliding device 7;
2) Placing a mass block with a specified requirement in a hollow cavity 62 of the impact module 6, starting the driving device 3, and enabling the lifting frame 5 to drive the impact module 6 to vertically rise to a specified height through the driving device 3 and hover;
3) The locking and releasing mechanism arranged between the lifting frame 5 and the impact module 6 acts to enable the impact module 6 to be separated from the lifting frame 5, freely fall and impact the energy-absorbing sliding device 7, so that the tested steering column 9 which is in sliding hinge connection with the energy-absorbing sliding device 7 collapses under the action of impact energy;
4) The data acquisition system displays and stores the force, speed and displacement data acquired in the test process.
The impact test device for the automobile collapsing steering column adopts a vertical falling mode to enable the impact module to impact the energy-absorbing sliding device to simulate the working condition of the automobile steering column when the automobile steering column is impacted. The initial impact speed is obtained through the impact of the impact block, the energy absorption effect of the safety airbag and the safety belt during frontal impact of the automobile is simulated through the energy absorption mechanism in the energy absorption sliding device, the continuous stress and free collapse of the automobile steering column in the collapse process are ensured through the sliding mechanism, so that the working condition of the automobile steering column when impacted can be simulated very truly, and meanwhile, the speed, displacement and other parameters during impact can be detected very conveniently. The test device has the advantages of compact structure, strong field adaptability, high reliability, simple and convenient operation, strong pertinence, practicability and effectiveness and low test cost. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (7)
1. An automobile collapsing steering column impact test device is characterized in that: the device comprises a bracket (2) and a data acquisition system, wherein a lifting frame (5) is arranged on the bracket (2), the lifting frame (5) is connected with a driving device (3), the driving device (3) drives the lifting frame (5) to move up and down along the vertical direction, the lower end of the lifting frame (5) is connected with an impact module (6) through a locking release mechanism, an energy absorption sliding device (7) is arranged below the impact module (6), the energy absorption sliding device (7) is connected with the bracket (2), a fixing device (8) for fixing a tested steering column (9) is arranged below the energy absorption sliding device, the tested steering column is in sliding hinge connection with the energy absorption sliding device, the energy absorption sliding device (7) comprises an energy absorption mechanism and a sliding mechanism, the energy absorption sliding mechanism can absorb part of energy generated during the impact, the energy absorption sliding mechanism can move in the vertical and horizontal directions, the sliding mechanism comprises a longitudinal sliding mechanism and a transverse sliding mechanism, the longitudinal sliding mechanism comprises a sliding rail (71), the longitudinal sliding rail (71) is connected with a first longitudinal sliding rail (72), the longitudinal sliding rail (72) is connected with a second sliding rail (72), the energy absorption mechanism comprises an air spring (74), wherein the air spring (74) is positioned on the first longitudinal sliding block (72), the energy absorption mechanism further comprises a hydraulic buffer (79), the hydraulic buffer (79) is connected with the bracket (2), and the hydraulic buffer (79) is arranged below the impact module (6);
the data acquisition system comprises a set of triaxial force sensor, a set of speed acquisition device, a set of high-speed camera displacement acquisition device and a set of data acquisition and analysis device; the three-axial force sensor is used for collecting forces generated in three directions of a steering column (9) to be tested in a test, and the speed collecting device is used for collecting initial speed of the impact module (6) when the impact module collides with the energy absorption sliding device (7) in the test; the high-speed camera shooting displacement acquisition device is used for acquiring displacement of the tested steering column which collapses during the test.
2. The automotive crush column impact test apparatus of claim 1, wherein: the bracket (2) and the fixing device (8) are fixed on a bottom plate (1).
3. The automotive crush column impact test apparatus of claim 1, wherein: the support (2) is also provided with a guide mechanism (4), the lifting frame (5) and the impact module (6) are connected with the guide mechanism (4), and the guide direction of the guide mechanism is parallel to the transmission direction of the driving device.
4. The automotive crush column impact test apparatus of claim 3, wherein: the guide mechanism is a guide rail sliding block mechanism or a guide pillar and guide sleeve mechanism.
5. The automotive crush column impact test apparatus of claim 1, wherein: the energy absorption sliding device (7) further comprises a force transmission frame (78) and a second longitudinal sliding block (73), the force transmission frame (78) is located on the second longitudinal sliding block (73), the second longitudinal sliding block is in sliding connection with the longitudinal sliding rail (71), the second longitudinal sliding block (73) is located above the first longitudinal sliding block (72), the air spring (74) is located between the first longitudinal sliding block (72) and the second longitudinal sliding block (73), and the impact module (6) is provided with an impact hammer head (61) corresponding to the position of the force transmission frame (78).
6. The automotive crush column impact test apparatus of claim 1, wherein: the impact module is provided with a hollow cavity (62) for placing the mass block.
7. The impact test method for the automotive crumple steering column is characterized by comprising the following steps of:
the automobile collapsing steering column impact test device according to any one of claims 1 to 6 is adopted, a steering column (9) to be tested is fixedly arranged on the fixing device (8) according to a specified position, and meanwhile, the upper end of the steering column (9) to be tested is in sliding hinge joint with the energy absorption sliding device (7);
starting the driving device (3) to enable the lifting frame (5) to drive the impact module (6) to vertically rise to a specified height and hover;
the locking release mechanism arranged between the lifting frame (5) and the impact module (6) acts to enable the impact module (6) to be separated from the lifting frame (5), freely fall down and impact the energy-absorbing sliding device (7), so that the tested steering column (9) which is slidably hinged with the energy-absorbing sliding device (7) collapses under the action of impact energy;
the acquisition system displays and stores the force, speed and steering column collapse displacement data acquired in the test process.
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| CN201611122333.7A CN106596026B (en) | 2016-12-08 | 2016-12-08 | Automobile collapsing steering column impact test device and test method |
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| CN201611122333.7A CN106596026B (en) | 2016-12-08 | 2016-12-08 | Automobile collapsing steering column impact test device and test method |
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| CN108051229A (en) * | 2017-12-21 | 2018-05-18 | 芜湖恒隆汽车转向系统有限公司 | The safe shock table of automobile steering system |
| CN108181112A (en) * | 2017-12-21 | 2018-06-19 | 芜湖恒隆汽车转向系统有限公司 | A kind of automobile steering system impact test apparatus |
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| CN108168915A (en) * | 2017-12-21 | 2018-06-15 | 芜湖恒隆汽车转向系统有限公司 | A kind of automobile steering system impact test method |
| CN107991111A (en) * | 2017-12-21 | 2018-05-04 | 芜湖恒隆汽车转向系统有限公司 | Automobile steering system shock table |
| CN112179601A (en) * | 2020-08-27 | 2021-01-05 | 东风延锋汽车饰件系统有限公司 | Steering column shield collapse test method and system |
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