CN111337238B - Device and method for verifying dynamic collapse performance of steering column - Google Patents
Device and method for verifying dynamic collapse performance of steering column Download PDFInfo
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- CN111337238B CN111337238B CN202010277472.7A CN202010277472A CN111337238B CN 111337238 B CN111337238 B CN 111337238B CN 202010277472 A CN202010277472 A CN 202010277472A CN 111337238 B CN111337238 B CN 111337238B
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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
- G01M13/00—Testing of machine parts
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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
- G01M17/00—Testing of vehicles
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- G01M17/0078—Shock-testing of vehicles
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Abstract
The invention discloses a device and a method for verifying dynamic collapse performance of a steering column. The test bed comprises a test bed base, a steering column mounting support seat, a steering column mounting support, an acceleration sensor, a triaxial force sensor, a force sensor support and a reference mark; the test bed base is fixed on the horizontal ground; the bottom of the steering column mounting and supporting seat is fixed on the base of the test bed, the top of the steering column mounting and supporting seat is connected with a steering column mounting support, a steering column is mounted on the steering column mounting support, the acceleration sensor, the triaxial force sensor and the force sensor support are mounted on the steering column, and the top of the steering column is connected with a steering wheel. The steering wheel center displacement monitoring device has the function of monitoring the transverse and longitudinal displacement of the steering wheel center point, can effectively evaluate and optimize the amount of movement of the steering wheel center point in the collapsing process, and ensures that the steering column collapses according to the designed movement direction.
Description
Technical Field
The invention belongs to the technical field of steering column tests, and particularly relates to a device and a method for verifying dynamic collapse performance of a steering column.
Background
With the development of the passive safety technology of the automobile, in order to further improve and optimize the passenger protection performance in the whole automobile collision, the steering column is generally designed to have a collapsing function. In order to ensure that the steering column can function according to the design criteria when a collision occurs, sufficient verification needs to be performed at the design stage. Most of the existing verification tests for the collapse performance of the steering column are static collapse modes, and because the contact posture of a driver and a steering wheel has unpredictability when actual collision occurs, the dynamic collapse performance verification needs to be carried out on the rack so as to ensure that the dynamic collapse performance verification can be adapted to different collision working condition requirements to the maximum extent in the actual collision.
The patent with publication number CN105699102A discloses a car steering column dynamic collapse force measuring device, which comprises a trolley connecting plate, a steering column mounting bracket, a force sensor, a leg rest support, a seat mounting support and a safety belt mounting support. Such a bench is essentially part of a tackle test bench, which has the following problems: (1) the collapse stroke of the steering column cannot be measured; (2) the collapse performance of the human body module when laterally impacting the steering column cannot be simulated; (3) the amount of lateral and longitudinal movement of the steering wheel center during collision cannot be estimated; (4) the bench needs to be matched with a sliding table device for testing, the test period is long, the cost is high, and the bench is not beneficial to rapid and repeated verification.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provide a verification device for the dynamic collapse performance of a steering column.
The technical scheme adopted by the invention is as follows: a device for verifying dynamic collapse performance of a steering column comprises a test bed base, a steering column mounting support seat, a steering column mounting support, an acceleration sensor, a triaxial force sensor, a force sensor support and a reference mark; the test bed base is fixed on the horizontal ground; the bottom of the steering column mounting support seat is fixed on the base of the test bed, the top of the steering column mounting support seat is connected with a steering column mounting support, a steering column is mounted on the steering column mounting support, the acceleration sensor, the triaxial force sensor and the force sensor support are mounted on the steering column, the top of the steering column is connected with a steering wheel, the foam pad is mounted on the steering wheel, and the reference marks comprise a first group of reference marks (two) which are respectively stuck on the side surface of the steering column mounting support seat, a second group of reference marks (two) on the steering column mounting support, a third reference mark on the side surface of the foam pad and a fourth reference mark in front of the foam pad;
the verification method of the verification device based on the dynamic collapse performance of the steering column comprises the following steps: the method comprises the following steps:
(1) a high-speed camera is arranged above a steering column mounting support at a position parallel to the plane of the steering column mounting support by a distance L1, a test bench in a horizontal range is ensured to be covered by the visual angle of the camera by setting L1, one side of a first group of datum marks is arranged on the steering column mounting support, a high-speed camera is arranged at a position parallel to the plane of the first group of datum marks by a distance L2, the test bench in a lateral range is ensured to be covered by the visual angle of the camera by setting L2, and a dummy module meeting the requirements of GB11557 appendix C in weight and size is connected to a launching device according to the position relative to a steering wheel in a finished automobile coordinate system;
(2) recording the distance h1 of a third reference mark relative to the connecting line of a first group of reference marks and the distance h2 of a fourth reference mark relative to the connecting line of a second group of reference marks through pictures collected by a high-speed camera before the test is started, and then using a transmitting device to transmit a dummy module according to a set transmitting speed V;
(3) after the test is finished, collecting acceleration sensor data, obtaining a collapse stroke L of the steering column through an integration method, collecting a three-axis force sensor to obtain a collapse force F of the steering column, recording a distance h1 'of a third reference mark relative to a connecting line of a first group of reference marks and a distance h 2' of a fourth reference mark relative to a connecting line of a second group of reference marks through a picture collected by a high-speed camera, and comparing and calculating with data before the test to obtain a steering wheel center point horizontal displacement X-h 2 '-h 2 and a vertical displacement Y-h 1' -h 1.
In the step (2), V is 5.0 to 5.5 m/s.
Further, the steering column mounting support is fixed on the test bed base according to a set lateral angle alpha which forms an included angle with a finished automobile YZ plane of 0-5 degrees, and the steering column mounting support is fixed on the steering column mounting support according to a set horizontal angle beta which forms an included angle with a finished automobile XY plane of 20-30 degrees.
Further preferred structure still includes the foam pad, the foam pad is installed on the steering wheel, third benchmark sign and fourth benchmark sign set up on the steering wheel through pasting in foam pad side and preceding.
Further preferred structure, steering column erection bracing seat bottom is equipped with a first circular through-hole and two first arc through-holes, the centre of a circle of first circular through-hole and the coincidence of the central pitch arc centre of a circle of first arc through-hole, the relative position of two first arc through-holes can be according to steering column erection bracing seat bottom size setting, steering column erection bracing seat top both sides are equipped with a second circular through-hole and a second arc through-hole respectively, the central pitch arc centre of a circle of second arc through-hole and the coincidence of the centre of a circle of the circular through-hole of second.
According to a further preferable structure, a first threaded hole and a second threaded hole are respectively formed in two sides of the steering column mounting support, two third threaded holes are formed in the end face of the steering column mounting support, the hole center distance of the third threaded holes is consistent with the distance between the lower mounting holes of the steering column, two welding-ready studs are arranged at the top of the steering column mounting support, and the distance between the axes of the welding-ready studs is consistent with the distance between the upper mounting holes of the steering column.
In a further preferred structure, the force sensor support comprises a lower connecting plate and an upper connecting plate, a fourth threaded hole matched with a steering shaft of a steering column and a third circular through hole matched with a mounting hole in the triaxial force sensor are formed in the lower connecting plate, and a fifth threaded hole matched with a steering wheel mounting shaft head and a fourth circular through hole matched with a mounting hole in the triaxial force sensor are formed in the upper connecting plate.
Further preferred structure, the foam pad includes foam filling block, foam dish and ribbon, and foam filling block edge shape is close with steering wheel gasbag edge shape to settle inside the steering wheel, foam dish edge is equipped with the recess that is close with steering wheel rim shape, is used for settling the rim part of steering wheel, and foam dish's edge suitable position is equipped with the aperture, and the ribbon passes the aperture and links together steering wheel and foam dish.
The device of the invention uses the acceleration sensor and the triaxial force sensor to acquire the steering column collapse stroke and the collapse force, and has higher measurement precision; the device has the function of monitoring the transverse and longitudinal displacement of the central point of the steering wheel, can effectively evaluate and optimize the amount of movement of the central point of the steering wheel in the collapsing process, and ensures that the steering column collapses according to the designed movement direction; the device structure is comparatively simple, repeatedly usable, can carry out many times and verify fast, has reduced experimental cost and cycle.
Drawings
FIG. 1 is a schematic view of the assembly of the apparatus of the present invention;
FIG. 2 is a schematic view of a steering column mounting support seat according to the present invention;
FIG. 3 is a structural schematic view of a steering column mounting bracket of the present invention;
FIG. 4 is an exploded view of the lower connecting plate of the force sensor bracket of the present invention;
FIG. 5 is an exploded view of the upper connecting plate structure of the force sensor bracket of the present invention;
FIG. 6 is a schematic view of the foam cushion structure of the present invention;
in the figure: 1-a test bed base; 2-mounting a support seat on the steering column; 3-a steering column mounting bracket; 4-a steering column; 5-an acceleration sensor; 6-a steering wheel; 7-triaxial force sensor; 8-a force sensor mount; 9-a foam pad; 10-reference mark.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
The verification device for the dynamic collapse performance of the steering column shown in fig. 1 comprises a test bed base 1, a steering column mounting support seat 2, a steering column mounting support 3, an acceleration sensor 5, a triaxial force sensor 7, a force sensor support 8, a foam pad 9 and a reference mark 10. Be equipped with the screw hole that the aperture is 20mm on the test bench base 1, the hole interval is 50mm for the steering column erection bracing seat position of adaptation different angles, test bench base 1 is fixed on the level ground. 2 bottoms of steering column erection bracing seat are fixed on test bench base 1, 2 tops of steering column erection bracing seat are connected with steering column installing support 3, steering column 4 is installed on steering column installing support 3, on acceleration sensor 5 and triaxial force transducer and the steering column 4 of 7 installations of support, steering wheel 6 is connected at 4 tops of steering column, foam pad 9 is installed on steering wheel 6, benchmark sign 10 pastes at steering column erection bracing seat 2 according to setting for the position respectively, steering column installing support 3 and foam pad 9 are last.
As shown in fig. 2, 2 bottoms of steering column erection bracing seat are equipped with a first circular through-hole 2.1 and two first arc through-holes 2.2, its circular through-hole is used for the location, the arc through-hole is used for adjusting the angle of steering column erection bracing seat, first circular through-hole center and first arc through-hole center coincidence, first circular through-hole 2.1 and first arc through-hole 2.2 diameter are 22mm, the centre of a circle of first circular through-hole 2.1 coincides with the centre of a circle of the central pitch arc of first arc through-hole 2.2, the central pitch arc radius of first arc through-hole 2.2 is 200mm, two relative positions of first arc through-hole 2.2 can be according to 2 bottom size settings of steering column erection bracing seat. When the steering column installation supporting seat 2 is installed, firstly, a circular through hole 2.1 of the steering column supporting seat 2 is superposed with a certain threaded hole on the test bed base 1 and is pre-screwed by using a bolt of M20, then, the angle of the steering column supporting seat 2 relative to a YZ plane of the whole vehicle is adjusted, after the adjustment is finished, two M20 bolts penetrate through two arc-shaped through holes 2.2 respectively and are aligned with the threaded holes on the test bed base 1, and finally, 3M 20 bolts are screwed according to set torque, so that the installation of the steering column installation supporting seat 2 on the test bed base 1 is finished; 2 top both sides of steering column erection bracing seat are equipped with a circular through-hole 2.3 of second and a second arc through-hole 2.4 respectively for connect the steering column installing support and make it possess the angle modulation function, the circular through-hole 2.3 of second and second arc through-hole 2.4 diameter are 14mm, the centre of a circle of the central pitch arc centre of a circle of second arc through-hole 2.4 and the coincidence of the centre of a circle of the circular through-hole 2.3 of second, the central pitch arc radius of second arc through-hole 2.4 is 100 mm.
As shown in figure 3, a first threaded hole 3.1 and a second threaded hole 3.2 are respectively arranged on two sides of a steering column mounting support 3, the distance between the circular through hole and the hole at the top of the steering column mounting support is consistent, the diameters of the first threaded hole 3.1 and the second threaded hole 3.2 are both 12mm, and the hole center distance between the first threaded hole 3.1 and the second threaded hole 3.2 is 100 mm. When the steering column mounting support 3 is mounted, aligning a first threaded hole 3.1 with a second circular through hole 2.3 on the steering column mounting support 2, pre-screwing by using two M12 bolts respectively, then adjusting the XY plane angle of the steering column mounting support 3 and a finished automobile, after the adjustment is finished, penetrating two M12 bolts through a second arc-shaped through hole 2.4 on the steering column mounting support 2 respectively and aligning with a second threaded hole 3.2 on the steering column mounting support 3, and finally screwing 4M 12 bolts according to a set torque to finish the mounting of the steering column mounting support 3 on the steering column mounting support 2; two third threaded holes 3.3 are formed in the end face of the steering column mounting support 3 and used for fixing a steering column, the distance and the size between the mounting hole and the mounting stud are consistent with the mounting size of the measured steering column, the diameter of the third threaded hole 3.3 is 8mm, the hole center distance of the third threaded hole 3.3 is consistent with the distance between the lower mounting holes of the steering column 4, two stud welding devices 3.4 are arranged at the top of the steering column mounting support 3, the diameter of the stud welding devices 3.4 is 8mm, and the distance between the axes of the stud welding devices 3.4 is consistent with the distance between the mounting holes in the steering column 4.
As shown in fig. 4 and 5, the force sensor support 8 includes a lower connecting plate 8.1 and an upper connecting plate 8.2, the lower connecting plate 8.1 is provided with a fourth threaded hole 8.1.1 matched with a steering shaft of the steering column 4 and a third circular through hole 8.1.2 matched with a mounting hole on the triaxial force sensor 7, and the upper connecting plate 8.2 is provided with a fifth threaded hole 8.2.1 matched with a mounting shaft head of a steering wheel and a fourth circular through hole 8.2.2 matched with a mounting hole on the triaxial force sensor 7. When assembling, the three-axial force sensor 7 is connected with the lower connecting plate 8.1 and the upper connecting plate 8.2 by using bolts matched with the mounting holes on the three-axial force sensor 7, then the fourth threaded hole 8.1.1 on the lower connecting plate 8.1 is screwed on the steering shaft thread of the steering column 4, and the steering wheel mounting shaft head is screwed in the fifth threaded hole 8.2.1 on the upper connecting plate 8.2, so that the connection of the three-axial force sensor 7 and the force sensor bracket 8 with the steering column 4 is completed.
As shown in fig. 6, the foam pad 9 comprises a foam filling block 9.1, a foam disc 9.2 and a binding belt 9.3, wherein the shape of the edge of the foam filling block 9.1 is similar to that of the edge of the steering wheel airbag, and the foam filling block is arranged inside the steering wheel 6, the edge of the foam disc 9.2 is provided with a groove 9.2.1 which is similar to that of the rim of the steering wheel 6, when the foam disc 9.2 is installed, the rim of the steering wheel 6 is embedded in the groove 9.2.1, a small hole 9.2.2 is arranged at a proper position on the edge of the foam disc 9.2, and the binding belt 9.3 is used for penetrating through the small hole 9.2.2 to connect the foam disc 9.2 and the rim of the steering wheel 6 together, so that the installation of the.
When in measurement, firstly, a steering column mounting support seat 2 is fixed on a test bed base 1 according to a set lateral angle alpha (an included angle with a YZ plane of a whole vehicle), a steering column mounting support 3 is fixed on the steering column mounting support seat 2 according to a set horizontal angle beta (an XY plane of the whole vehicle), a steering column 4 to be measured is mounted on the steering column mounting support 3 according to a set moment, an acceleration sensor 5 is pasted on a support of the steering column 4 by glue, a triaxial force sensor 7 and a force sensor support 8 are used for connecting the steering column 4 and a steering wheel 6, a foam filling block 9.1 is mounted in the steering wheel 6, a foam disc 9.2 is mounted on a rim of the steering wheel, the foam disc is connected with the rim of the steering wheel by a ribbon 9.3, reference marks 10 are pasted on the front edge and the side edge of the foam disc 9.2, the center of the reference marks 10 and the center point of the steering wheel 6 are positioned in the same plane, and two reference marks 10 are respectively stuck to the steering column mount support base 2 and the steering column mount bracket 3 as shown in assembly drawing 1.
A high-speed camera is arranged above a steering column mounting support 3 at a position parallel to the plane of the steering column mounting support by a distance L1, a test bench in a horizontal range is ensured to be covered by the visual angle of the camera by setting L1, one side of a first group of reference marks (two) 10.1 on the steering column mounting support 2 is provided with the high-speed camera at a position parallel to the plane of the first group of reference marks 10.1 by a distance L2, the test bench in a lateral range is ensured to be covered by the visual angle of the camera by setting L2, and a dummy module with the weight and the size meeting the requirements of GB11557 appendix C is connected to a launching device according to the position of the whole vehicle coordinate system relative to a steering wheel 6;
before the test is started, recording the distance h1 between the third benchmark marker 10.3 and a connecting line of the first group of benchmark markers (two) 10.1 and the distance h2 between the fourth benchmark marker 10.4 and a connecting line of the second group of benchmark markers (two) 10.2 through a picture acquired by a high-speed camera, and then using a transmitting device to transmit a dummy module according to a set transmitting speed V which is 5.0-5.5 m/s;
after the test is finished, collecting acceleration sensor data, obtaining a collapse stroke L of the steering column through an integration method, collecting a three-axis force sensor to obtain a collapse force F of the steering column, recording a distance h1 'of a third datum mark 10.3 relative to a connecting line of a first group of datum marks 10.1 and a distance h 2' of a fourth datum mark 10.4 relative to a connecting line of a second group of datum marks 10.2 through a picture collected by a high-speed camera, and comparing and calculating with data before the test to obtain a central point horizontal displacement X of the steering wheel 6 which is h2 '-h 2 and a vertical displacement Y which is h 1' -h 1.
Those not described in detail in this specification are within the skill of the art.
Claims (8)
1. A device for verifying dynamic collapse performance of a steering column comprises a test bed base (1), a steering column mounting support seat (2), a steering column mounting support (3), an acceleration sensor (5), a triaxial force sensor (7) and a force sensor support (8); the test bed base (1) is fixed on the horizontal ground; the test bed is characterized in that the bottom of the steering column mounting and supporting seat (2) is fixed on the test bed base (1), the top of the steering column mounting and supporting seat (2) is connected with a steering column mounting support (3), a steering column (4) is mounted on the steering column mounting support (3), the steering column (4) is mounted on the acceleration sensor (5), the triaxial force sensor (7) and the force sensor support (8), and the steering wheel (6) is connected to the top of the steering column (4), and is characterized in that: the device is characterized by further comprising reference signs (10), wherein the reference signs comprise a first group of reference signs (10.1) which are respectively arranged on the side surface of the steering column mounting support seat (2), a second group of reference signs (10.2) on the steering column mounting support (3), a third reference sign (10.3) on the side surface of the steering wheel (6), and a fourth reference sign (10.4) in front of the steering wheel (6);
the verification method of the verification device based on the dynamic collapse performance of the steering column comprises the following steps: the method comprises the following steps:
(1) a high-speed camera is arranged above a steering column mounting support (3) at a distance L1 parallel to the plane of the steering column mounting support, a test bench in a horizontal range is ensured to be covered by the visual angle of the camera through the setting of L1, one side of a first group of reference marks (10.1) on the steering column mounting support (2) is provided with the high-speed camera at a distance L2 parallel to the plane of the first group of reference marks (10.1), the test bench in a lateral range is ensured to be covered by the visual angle of the camera through the setting of L2, and a dummy module meeting the requirements of GB 11557C in weight and size is connected to a launching device according to the position corresponding to a steering wheel (6) in an attached vehicle coordinate system;
(2) recording the distance h1 between a third reference mark (10.3) and a first group of reference marks (10.1) and the distance h2 between a fourth reference mark (10.4) and a second group of reference marks (10.2) through pictures collected by a high-speed camera before the test is started, and then using a transmitting device to transmit a dummy module according to a set transmitting speed V;
(3) after the test is finished, collecting acceleration sensor data, obtaining a collapse stroke L of the steering column through an integration method, collecting a three-axis force sensor to obtain a collapse force F of the steering column, recording a distance h1 'of a third reference mark (10.3) relative to a connecting line of a first group of reference marks (10.1) and a distance h 2' of a fourth reference mark (10.4) relative to a connecting line of a second group of reference marks (10.2) through a picture collected by a high-speed camera, and comparing and calculating with the data before the test to obtain the horizontal displacement X of the center point of the steering wheel (6) -h2 '-h 2 and the vertical displacement Y-h 1' -h 1.
2. The verification device for the dynamic collapse performance of a steering column according to claim 1, wherein: the steering column installing and supporting base (2) is fixed on the test bed base (1) according to a set lateral angle alpha which forms an included angle with a finished automobile YZ plane and ranges from 0 degree to 5 degrees, and the steering column installing support (3) is fixed on the steering column installing and supporting base (2) according to a set horizontal angle beta which forms an included angle with a finished automobile XY plane and ranges from 20 degrees to 30 degrees.
3. The verification device for the dynamic collapse performance of a steering column according to claim 1, wherein: still include foam pad (9), foam pad (9) are installed on steering wheel (6), third benchmark sign (10.3) and fourth benchmark sign (10.4) are through pasting setting up on steering wheel (6) in foam pad (9) side and preceding.
4. The verification device for the dynamic collapse performance of a steering column according to claim 1, wherein: steering column erection bracing seat (2) bottom is equipped with a first circular through-hole (2.1) and two first arc through-holes (2.2), the centre of a circle of first circular through-hole (2.1) and the coincidence of the central pitch arc centre of a circle of first arc through-hole (2.2), the relative position of two first arc through-holes (2.2) can be according to steering column erection bracing seat (2) bottom size setting, steering column erection bracing seat (2) top both sides are equipped with a circular through-hole of second (2.3) and a second arc through-hole (2.4) respectively, the coincidence of the centre of a circle of the central pitch arc centre of a circle of second arc through-hole (2.4) and the centre of a circle of the circular through-hole of second (2.3).
5. The verification device for the dynamic collapse performance of a steering column according to claim 1, wherein: the steering column mounting bracket is characterized in that a first threaded hole (3.1) and a second threaded hole (3.2) are respectively formed in two sides of the steering column mounting bracket (3), two third threaded holes (3.3) are formed in the end face of the steering column mounting bracket (3), the hole center distance of the third threaded holes (3.3) is consistent with the lower mounting hole distance of the steering column (4), two stud welding-ready bolts (3.4) are arranged at the top of the steering column mounting bracket (3), and the axis distance of the stud welding-ready bolts (3.4) is consistent with the mounting hole distance of the steering column (4).
6. The verification device for the dynamic collapse performance of a steering column according to claim 1, wherein: force transducer support (8) are including lower connecting plate (8.1) and upper junction plate (8.2), be equipped with on lower connecting plate (8.1) with fourth screw hole (8.1.1) that the steering spindle of steering column (4) matches and with third circular through-hole (8.1.2) that the mounting hole on triaxial force transducer (7) matches, be equipped with on upper junction plate (8.2) with fifth screw hole (8.2.1) that steering wheel installation spindle nose matches and with fourth circular through-hole (8.2.2) that the mounting hole on triaxial force transducer (7) matches.
7. A verification device for the dynamic collapse performance of a steering column according to claim 3, wherein: foam pad (9) are including foam filling block (9.1), foam dish (9.2) and ribbon (9.3), foam filling block (9.1) edge shape is close with steering wheel gasbag edge shape to settle inside steering wheel (6), foam dish (9.2) edge is equipped with recess (9.2.1) close with steering wheel (6) rim shape, a rim part for settling steering wheel (6), the edge suitable position of foam dish (9.2) is equipped with aperture (9.2.2), ribbon (9.3) pass aperture (9.2.2) and link together steering wheel (6) and foam dish (9.2).
8. A verification method of a verification device of steering column dynamic collapse performance according to claim 1, characterized in that: in the step (2), V is 5.0 to 5.5 m/s.
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| CN113092139B (en) * | 2021-04-30 | 2022-10-14 | 东风柳州汽车有限公司 | Steering wheel assembly operability verification device |
| CN114112148B (en) * | 2021-11-24 | 2023-06-06 | 重庆长安汽车股份有限公司 | Device and method for measuring collapsing force of steering column |
| CN114940205B (en) * | 2022-05-31 | 2023-04-25 | 岚图汽车科技有限公司 | Assembly structure of steering column |
| CN117969124A (en) * | 2024-03-28 | 2024-05-03 | 中汽研汽车检验中心（天津）有限公司 | Steering mechanism injury prevention test system |
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