CN118329474B - Vehicle road environment simulation test bed - Google Patents
Vehicle road environment simulation test bed Download PDFInfo
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- CN118329474B CN118329474B CN202410763566.3A CN202410763566A CN118329474B CN 118329474 B CN118329474 B CN 118329474B CN 202410763566 A CN202410763566 A CN 202410763566A CN 118329474 B CN118329474 B CN 118329474B
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- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000004088 simulation Methods 0.000 title claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 239000000725 suspension Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a vehicle road environment simulation test bed, which comprises a wheel support unit and a wheel base adjusting mechanism for adjusting the wheel base and the wheel base, wherein the wheel base adjusting mechanism is used for adjusting the wheel base; the wheel base adjusting mechanism comprises a basic platform and an adjusting sliding table; the basic platform moves along with the adjusting sliding table, and the wheel supporting unit is fixed on the basic platform; the wheel supporting unit comprises a supporting oil cylinder, a supporting platform and a steering mechanism; the support cylinder is connected with the support platform through a rotatable rotating shaft; the supporting platform comprises a supporting wheel set and a driving system; the steering mechanism comprises a steering motor and a steering gear set; the supporting oil cylinder, the supporting wheel group and the steering mechanism are matched during testing, so that the vehicle can simulate running under various road conditions, and the automatic driving performance of the vehicle can be conveniently tested in a laboratory.
Description
Technical Field
The invention relates to the technical field of vehicle testing equipment, in particular to a vehicle road environment simulation test bed.
Background
The development of automatic driving technology of vehicles is more and more important for testing the automatic driving performance of vehicles, the requirements are higher and higher, the field test is limited by the size of the field, the comprehensive test cannot be performed, and the road test of the vehicles is long in time and huge in cost, so that a device capable of rapidly testing the automatic driving performance of the vehicles is needed, wherein the device can simulate various road conditions in a laboratory;
The conventional four-column road simulation test bed is often used for testing the suspension performance of a vehicle, does not support the simulation test of each road condition of the test vehicle in a running state, and cannot test the running performance of the vehicle such as straight running, acceleration and deceleration, cornering and the like.
Disclosure of Invention
In view of the defects of the conventional four-column test bed road simulation test bed, the invention provides a vehicle road environment simulation test bed which can achieve the effect of simulating the road environment in the running state of a vehicle.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
A vehicle road environment simulation test bed comprises a wheel support unit and a wheel base adjusting mechanism for adjusting the wheel base and the wheel base; the wheel distance adjusting mechanism comprises a basic platform and an adjusting sliding table; the basic platform moves along with the adjusting sliding table, and the wheel supporting unit is fixed on the basic platform; the wheel supporting unit comprises a supporting oil cylinder, a supporting platform and a steering mechanism; the support cylinder is connected with the support platform through a rotatable rotating shaft; the supporting platform comprises a supporting wheel set and a driving system; the steering mechanism comprises a steering motor and a steering gear set; during testing, wheels of a tested vehicle are placed on a supporting platform to be in contact with the supporting wheel sets; the supporting cylinder drives the supporting platform to reciprocate up and down, the driving system drives the supporting wheel set to rotate, and the steering mechanism drives the rotating shaft through the steering gear set to drive the supporting platform to rotate.
According to one aspect of the invention, the supporting wheel set is arranged in the middle of the supporting platform and comprises a main supporting wheel and a secondary supporting wheel which are arranged in parallel; the driving system comprises a driving motor and a transmission toothed belt; the driving motor drives the main supporting wheel to rotate through the transmission toothed belt.
According to one aspect of the invention, the steering gear set comprises a driving wheel and a driven wheel which are meshed with each other; the driving wheel is connected with the steering motor, and the driven wheel is coaxially fixed with the rotating shaft.
According to one aspect of the invention, the driving wheel is connected with the steering motor through a rolling spline pair; the rolling spline pair comprises a spline shaft and a spline cylinder; the spline shaft is fixedly connected with the output shaft of the steering motor, and the driving wheel is sleeved outside the spline cylinder.
According to one aspect of the present invention, the number of the wheel supporting units is four; the adjusting sliding table comprises four groups of wheel base adjusting sliding tables and two groups of wheel base adjusting sliding tables.
According to one aspect of the invention, the track adjusting sliding table is provided with a track adjusting screw rod and a track adjusting motor; the wheelbase adjusting sliding table comprises a wheelbase adjusting screw rod and a wheelbase adjusting motor.
According to one aspect of the invention, a group of track adjusting slipways is arranged on each track adjusting slipway.
According to one aspect of the invention, the main supporting wheel is provided with a clutch; the auxiliary supporting wheel is provided with a brake.
According to one aspect of the invention, the support platform further comprises a spacing wheel set; the limiting wheel set comprises a lateral limiting wheel, a front limiting wheel, a rear limiting wheel and a blocking oil cylinder; the front limiting wheel and the rear limiting wheel are arranged in parallel with the supporting wheel group and are connected with the blocking oil cylinder.
According to one aspect of the invention, the steering motor is fixedly connected with the support cylinder through a reinforcing ring.
The implementation of the invention has the advantages that:
Compared with the traditional four-column road simulation test bed device, the test bed disclosed by the application is provided with the supporting wheel sets, and the supporting platform can independently perform longitudinal height adjustment and rapid reciprocating motion in a certain range so as to simulate various road conditions; the supporting wheel set is driven by the driving system to rotate so as to simulate the running load of a single wheel; the test bed is provided with the steering mechanism, can drive the supporting platform to rotate along with the steering wheels of the vehicle, simulates the turning scene in the running process of the vehicle, can simulate the running situation of the vehicle on various roads in a limited field, and can perform long-time stable test, is suitable for testing the automatic driving performance of the vehicle, and can test the suspension performance and durability of the vehicle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a vehicle road environment simulation test stand according to the present invention;
fig. 2 is a schematic structural view of a wheel supporting unit and a wheel-space adjusting mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view of a wheel supporting unit according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of the portion indicated by reference character I in FIG. 3;
Fig. 5 is a schematic view of a part of a structure of an adjusting sliding table according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a tested vehicle on a test stand according to an embodiment of the present invention.
Legend description: 1. a wheel supporting unit; 11. a support cylinder; 111. a rotating shaft; 12. a support platform; 121. a main support wheel; 122. an auxiliary supporting wheel; 13. a drive system; 131. a driving motor; 132. a drive toothed belt; 14. a steering mechanism; 141. a steering motor; 142. a driving wheel; 143. driven wheel; 144. a rolling spline pair; 151. a lateral limit wheel; 152. front and rear limit wheels; 153. blocking the oil cylinder; 16. a reinforcing ring; 2. wheel-axle distance adjusting mechanism; 21. a base platform; 22. a wheel tread adjusting sliding table; 23. a wheelbase adjusting sliding table; 24. a wheel tread adjusting screw rod; 25. a wheel tread adjusting motor; 26. a wheelbase adjusting screw; 27. and a wheelbase adjusting motor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, 2,3, 4, 5 and 6, a vehicle road environment simulation test stand includes a wheel support unit 1 and a wheel base adjusting mechanism 2 for adjusting a wheel base and a wheel base; the wheel distance adjusting mechanism 2 comprises a basic platform 21 and an adjusting sliding table; the base platform 21 moves along with the adjusting sliding table, and the wheel supporting unit 1 is fixed on the base platform 21; the wheel supporting unit 1 comprises a supporting cylinder 11, a supporting platform 12 and a steering mechanism 14; the support cylinder 11 is connected with the support platform 12 through a rotatable rotating shaft 111; the support platform 12 comprises a support wheel set and a drive system 13; the steering mechanism 14 includes a steering motor 141 and a steering gear set;
During testing, the wheel base adjusting mechanism 2 adjusts the wheel base and the wheel base of the test bed to be consistent with the tested vehicle; each wheel of the tested vehicle is placed on the corresponding supporting platform 12 to be contacted with the supporting wheel set; the supporting cylinder 11 drives the supporting platform 12 to reciprocate up and down, the driving system 13 drives the supporting wheel sets to rotate, the height of the wheel supporting units 1 is changed through lifting, the rapid movement of the supporting platform 12 can be simulated when the vehicle runs on roads with various gradients and inclined angles, and the situation that the vehicle encounters obstacles such as pits and the like in the running process can be simulated; the steering mechanism 14 drives the rotating shaft 111 through the steering gear set to drive the supporting platform 12 to rotate, so that the steering condition in the running process of the vehicle can be simulated.
The supporting wheel set is arranged in the middle of the supporting platform 12 and comprises a main supporting wheel 121 and a secondary supporting wheel 122 which are arranged in parallel; the drive system 13 includes a drive motor 131 and a transmission toothed belt 132; the driving motor 131 drives the main supporting wheel 121 to rotate through the transmission toothed belt 132, and the wheels of the tested vehicle are placed on the supporting platform 12 and can keep relative motion with the supporting wheel sets, namely, the vehicle is static, but the wheels are in a rotating state during testing, so that the running state of the vehicle is better simulated, and various road conditions (up-slope, down-slope, inclined road surface, turning over-bend and various hollow ditches) can be realized by matching with the supporting platform 12 which can be rapidly lifted and turned; the driving system 13 drives the supporting wheel set to actively rotate, so that the load of a single wheel in the running process can be simulated, and the driving system can be suitable for various types and sizes of front drive, rear drive and four drive vehicles;
Further, a clutch is provided at the main supporting wheel 121, which can cut off the power connection with the driving motor 131 when needed, in which case passive rotation driven by the wheels can be achieved; the sub supporting wheel 122 is provided with a brake, and provides braking force when necessary, to brake the sub supporting wheel 122.
The steering gear set comprises a driving wheel 142 and a driven wheel 143 which are meshed with each other; the driving wheel 142 is connected with the steering motor 141, and the driven wheel 143 is coaxially fixed with the rotating shaft 111; in order to ensure that the steering mechanism 14 still can ensure the transmission of steering torque when the supporting platform 12 moves up and down along with the supporting oil cylinder 11, the driving wheel 142 is connected with the steering motor 141 through the rolling spline pair 144; the rolling spline pair 144 includes a spline shaft and a spline cylinder; the spline shaft is fixedly connected with the output shaft of the steering motor 141, the driving wheel 142 is sleeved outside the spline cylinder, so that when the supporting platform 12 moves back and forth rapidly, the driving wheel 142 and the driven wheel 143 are meshed at any time, and the device is suitable for testing the working condition of large vibration impact load and high load on a vehicle road; the steering motor 141 may transmit torque to the steering shaft through the steering gear set to simulate the steering condition during the traveling state and the lifting of the support platform 12.
Compared with the traditional four-column road simulation test bed device, the test bed disclosed by the application is provided with the supporting wheel sets, so that the vehicles in various driving modes are allowed to carry out the simulation test on the driving states, the supporting platforms 12 corresponding to four wheels can independently carry out longitudinal height adjustment and quick reciprocating motion in a certain range so as to simulate various road conditions, such as front high-back low simulation uphill, front low-back high simulation downhill and different amplitude vibration simulation vehicles drive various obstacles, and the supporting wheel sets are driven by the driving system 13 to rotate so as to simulate the driving loads of single wheels; the test bed is provided with the steering mechanism 14 which can drive the supporting platform 12 to rotate along with the steering wheels of the vehicle, simulates the turning scene in the running process of the vehicle, is also suitable for the vehicle test for supporting the steering of the rear wheels because each wheel supporting unit 1 is provided with the steering mechanism 14, can simulate the running condition of the vehicle on various roads in a limited field, can perform long-time stable test, can be suitable for testing the automatic driving performance of the vehicle, and can test the suspension performance and durability of the vehicle.
The number of the wheel supporting units 1 is four, and the wheel supporting units are applicable to most of passenger cars commonly used in the market (as shown in fig. 6, a schematic diagram of the cars placed on a test bed); the adjusting sliding table comprises four groups of wheel base adjusting sliding tables 22 and two groups of wheel base adjusting sliding tables 23; the track adjusting sliding table 22 is provided with a track adjusting screw 24 and a track adjusting motor 25; the wheel base adjusting sliding tables 23 comprise wheel base adjusting screw rods 26 and wheel base adjusting motors 27, the wheel base and the wheel base can be accurately adjusted through electric adjustment, and each group of sliding tables is provided with a locking oil cylinder for locking the sliding tables after the wheel base/wheel base is adjusted in place in order to ensure that the wheel base/wheel base can be kept fixed after the wheel base is adjusted;
Two groups of wheel-base adjusting sliding tables 23 are arranged in parallel, one group of wheel-base adjusting sliding tables 22 are respectively arranged on the two groups of wheel-base adjusting sliding tables (as shown in fig. 5), and the other two groups of wheel-base adjusting sliding tables 22 are independently arranged on the extension line of the wheel-base adjusting sliding tables 23; since the length of the vehicle is generally much greater than the width of the vehicle, the wheelbase adjusting slide 23 has enough space adjusting travel, and each wheel supporting unit 1 is correspondingly provided with a wheelbase adjusting slide 22, so that the range of the wheelbase adjusting is multiplied in the limited space.
The supporting unit also comprises a limiting wheel set; the limiting wheel set comprises a lateral limiting wheel 151, a front limiting wheel 152, a rear limiting wheel 152 and a blocking oil cylinder 153; when the test bed is actually used, most of the wheel-axle distance adjusting mechanism 2 and the wheel supporting unit 1 are hidden below the ground, the upper part of the supporting platform 12 is basically leveled with the ground, and a tested vehicle can run to the test bed to be in place during testing; the front limiting wheel 152 and the rear limiting wheel 152 are arranged in parallel with the supporting wheel group and are connected with the blocking oil cylinder 153, when necessary, the blocking oil cylinder 153 acts to retract the front limiting wheel 152 and the rear limiting wheel 152, so that the vehicle can normally run on a test bed, and when the test starts, the blocking oil cylinder 153 lifts the front limiting wheel 152 and the rear limiting wheel 152 to play a role in limiting the vehicle in place; the lateral limiting wheels 151 are at least three in number and are all arranged on the outward side of the vehicle and are arranged along the circumference of the wheels, so that the friction force between the wheels and the outer side of the test bed can be reduced besides limiting the sideslip of the vehicle.
The supporting cylinder 11 adopts a hydraulic servo actuator widely adopted by a four-column test system, has the characteristics of high rigidity, high lateral force resistance and high frequency response, and can support the simulation of various complex road conditions; the steering motor 141 is composed of a servo motor and a speed reducer, and supports steering towards two sides; the steering motor 141 is fixedly connected with the supporting oil cylinder 11 through a reinforcing ring 16, so that the anti-torsion performance can be improved, the structural strength is increased, and the stability of the steering mechanism 14 is ensured.
The implementation of the invention has the advantages that:
Compared with the traditional four-column road simulation test bed device, the test bed disclosed by the application is provided with the supporting wheel sets, and the supporting platform can independently perform longitudinal height adjustment and rapid reciprocating motion in a certain range so as to simulate various road conditions; the supporting wheel set is driven by the driving system to rotate so as to simulate the running load of a single wheel; the test bed is provided with the steering mechanism, can drive the supporting platform to rotate along with the steering wheels of the vehicle, simulates the turning scene in the running process of the vehicle, can simulate the running situation of the vehicle on various roads in a limited field, and can perform long-time stable test, is suitable for testing the automatic driving performance of the vehicle, and can test the suspension performance and durability of the vehicle.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The vehicle road environment simulation test bed comprises a wheel support unit (1) and a wheel base adjusting mechanism (2) for adjusting the wheel base and the wheel base, and is characterized in that the wheel base adjusting mechanism (2) comprises a basic platform (21) and an adjusting sliding table; the base platform (21) moves along with the adjusting sliding table, and the wheel supporting unit (1) is fixed on the base platform (21); the wheel supporting unit (1) comprises a supporting oil cylinder (11), a supporting platform (12) and a steering mechanism (14); the support cylinder (11) is connected with the support platform (12) through a rotatable rotating shaft (111); the supporting platform (12) comprises a supporting wheel set and a driving system (13); the steering mechanism (14) comprises a steering motor (141) and a steering gear set; during testing, wheels of a tested vehicle are placed on a supporting platform (12) to be in contact with the supporting wheel sets; the supporting cylinder (11) drives the supporting platform (12) to reciprocate up and down, the driving system (13) drives the supporting wheel set to rotate, and the steering mechanism (14) drives the rotating shaft (111) through the steering gear set to drive the supporting platform (12) to rotate; the support wheel set is arranged in the middle of the support platform (12) and comprises a main support wheel (121) and an auxiliary support wheel (122) which are arranged in parallel; the driving system (13) comprises a driving motor (131) and a transmission toothed belt (132); the driving motor (131) drives the main supporting wheel (121) to rotate through the transmission toothed belt (132); the steering gear set comprises a driving wheel (142) and a driven wheel (143) which are meshed with each other; the driving wheel (142) is connected with the steering motor (141), and the driven wheel (143) is coaxially fixed with the rotating shaft (111); the driving wheel (142) is connected with the steering motor (141) through a rolling spline pair (144); the rolling spline pair (144) comprises a spline shaft and a spline cylinder; the spline shaft is fixedly connected with an output shaft of a steering motor (141), and a driving wheel (142) is sleeved outside the spline cylinder; the main supporting wheel (121) is provided with a clutch; the auxiliary supporting wheel (122) is provided with a brake; the supporting platform (12) also comprises a limiting wheel set; the limiting wheel set comprises a lateral limiting wheel (151), a front limiting wheel (152) and a rear limiting wheel (153) and a blocking oil cylinder (153); the front limit wheel (152) and the rear limit wheel (152) are arranged in parallel with the supporting wheel group and are connected with the blocking oil cylinder (153).
2. The vehicle road environment simulation test stand according to claim 1, characterized in that the number of the wheel supporting units (1) is four; the adjusting sliding table comprises four groups of wheel base adjusting sliding tables (22) and two groups of wheel base adjusting sliding tables (23).
3. The vehicle road environment simulation test stand according to claim 2, characterized in that the tread adjustment slide table (22) is provided with a tread adjustment screw (24) and a tread adjustment motor (25); the wheelbase adjusting sliding table (23) comprises a wheelbase adjusting screw rod (26) and a wheelbase adjusting motor (27).
4. A vehicle road environment simulation test bench according to claim 3, characterized in that a set of track adjustment slipways (22) is provided on each of said track adjustment slipways (23).
5. The vehicle road environment simulation test stand according to claim 1, characterized in that the steering motor (141) is fixedly connected with the support cylinder (11) through a reinforcement ring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410763566.3A CN118329474B (en) | 2024-06-14 | 2024-06-14 | Vehicle road environment simulation test bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410763566.3A CN118329474B (en) | 2024-06-14 | 2024-06-14 | Vehicle road environment simulation test bed |
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| CN118329474A CN118329474A (en) | 2024-07-12 |
| CN118329474B true CN118329474B (en) | 2024-09-10 |
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- 2024-06-14 CN CN202410763566.3A patent/CN118329474B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208721405U (en) * | 2018-07-26 | 2019-04-09 | 石家庄华燕交通科技有限公司 | The experimental rig of simulating vehicle climb and fall |
| CN215726830U (en) * | 2021-08-26 | 2022-02-01 | 北京博科测试系统股份有限公司 | Wheel base adjusting device of road simulator |
| CN218584349U (en) * | 2022-10-26 | 2023-03-07 | 湖北中程科技产业技术研究院有限公司 | Wheel working condition simulation device |
| CN117387964A (en) * | 2023-09-26 | 2024-01-12 | 南通常测机电设备有限公司 | Four-column whole vehicle loading test bed |
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