Automobile front and rear axle disturbance equipment

Abstract

The invention provides automobile front and rear axle disturbance equipment, and relates to the technical field of vehicle safety, the automobile front and rear axle disturbance equipment comprises a base, a sliding table arranged on the base and an actuator connected with the sliding table, and a friction plate is arranged on the sliding table; when a to-be-tested automobile runs until the wheels are located on the friction plates, the actuator is driven to stretch and retract so as to drive the sliding table to move in the direction approximately perpendicular to the running direction of the automobile, and the purpose of simulating transverse disturbance of the running automobile is achieved. Transverse displacement is applied on a vehicle driving lane through the sliding table, so that the vehicle axle transverse disturbed situation is simulated, the vehicle anti-interference stability is evaluated, test consumption is reduced, it can be ensured that the test is safer, impact external parameter values can be effectively quantified, the disturbed situation is reproduced multiple times, the test process is controllable, and the test efficiency is improved. Accurate and reliable data can be provided for function safety evaluation of the vehicle through multiple tests.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile safety technology, in particular, the present application relates to a kind of front and rear axle disturbance equipment of automobile. BACKGROUND

[0002] With the development of science and technology, cars are also more and more popular, and the number of cars is also increasing, and people drive cars for a longer time, so the safety of the car in the driving process is also more and more valued.

[0003] In actual driving, especially in the case of sudden impact, side impact and stop, the tail of the car is prone to uneven yaw force and skidding, which can easily lead to loss of control of the car.

[0004] There are also more and more test methods and devices for side impact of the car, for example, the invention patent CN113125167A discloses a device for testing the anti-impact ability of the car, which comprises a body, a working cavity with an opening to the right is arranged in the body, a protection door capable of closing the opening of the working cavity to the right is rotatably connected to the rear wall of the working cavity, a lead screw cavity with an opening upward is arranged in the body, a first motor is fixedly arranged in the right wall of the lead screw cavity, and a lead screw is fixedly arranged on the output shaft of the left side of the first motor. Compared with the traditional automobile safety test device, the above-mentioned invention can fix the car to a specified position, and the impact plate is driven by electricity to simulate the impact, and the impact force is the same each time, which reduces the error. In order to test more reasonably, the simulation impact at different positions is carried out in turn, so as to improve the accuracy of the test, and the invention saves time and labor, has simple structure, and is worth promoting.

[0005] However, the above-mentioned device for testing the anti-impact ability of the car still has the following disadvantages: it depends on the impact of the car or the simulation of the impact experiment by the external object, which consumes a lot of material and human resources, has a high risk coefficient and high test cost; this kind of traditional method lacks the data of the impulse applied each time, and it is difficult to reproduce the dynamic response of the car under different situations.

[0006] Therefore, in order to solve the above-mentioned problems, it is necessary for us to design a front and rear axle anti-disturbance stability test method. SUMMARY

[0007] The purpose of the present application is to provide a kind of front and rear axle disturbance equipment of automobile, by sliding table to apply lateral displacement on the driving lane of the car, so as to simulate the lateral disturbance situation of the car axle, so as to evaluate the anti-disturbance stability of the car, not only reduce the test consumption, but also ensure the test more safely, and effectively quantify the impact external parameter value to reproduce the disturbed situation multiple times, the test process is controllable, and accurate and reliable data can be provided for the functional safety evaluation of the car after multiple tests.

[0008] To achieve the above object, the present application adopts the following technical solutions to achieve the above object:

[0009] A front and rear axle disturbance device for a vehicle, comprising a base, a sliding table arranged on the base, and an actuator connected with the sliding table, and a friction plate arranged on the sliding table;

[0010] The vehicle to be tested is driven to the position where the wheels are on the friction plate, and the actuator is driven to extend and retract to drive the sliding table to displace in a direction substantially perpendicular to the driving direction of the vehicle, thereby simulating the lateral disturbance of the vehicle during driving.

[0011] As a preferred embodiment of the present application, the base is arranged on the road surface to be tested, and a fixing lug for connecting with the road surface is arranged on the base, and a buffer pad is arranged between the base and the road surface.

[0012] As a preferred embodiment of the present application, a mounting seat for connecting with the road surface to be tested is arranged on the actuator, the actuator is one of a hydraulic cylinder, an electric cylinder and a pneumatic cylinder, and a sensor for measuring the extension length of the actuator in real time is arranged at the end of the actuator away from the sliding table.

[0013] As a preferred embodiment of the present application, a reinforced connecting seat is arranged on the sliding table, and the extension rod of the actuator is connected with the reinforced connecting seat through connecting bolts.

[0014] As a preferred embodiment of the present application, anti-skid lines are arranged on the upper surface of the friction plate.

[0015] As a preferred embodiment of the present application, the side of the sliding table close to the base and the side of the base close to the sliding table are both smooth.

[0016] As a preferred embodiment of the present application, the thickness of the base, the sliding table and the friction plate is not greater than 2mm, and the length of the sliding table and the friction plate is not less than the width of the vehicle.

[0017] As a preferred embodiment of the present application, a speed detector is arranged at the front of the base close to the direction of the vehicle.

[0018] When the speed detector detects the vehicle, the actuator is driven to extend and retract to drive the sliding table to displace in a direction substantially perpendicular to the driving direction of the vehicle.

[0019] As a preferred embodiment of the present application, the number of the sliding tables is at least one.

[0020] As a preferred embodiment of the present application, a limiting block for limiting the position of the sliding table is arranged on the base.

[0021] The beneficial effect of the automobile front and rear axle disturbance device is that: the lateral displacement is applied on the automobile driving lane through the sliding table, so as to simulate the lateral disturbance of the automobile axle, so as to evaluate the anti-disturbance stability of the automobile, not only reduce the test consumption, but also ensure the test safety, and effectively quantify the impact of external parameter values, so as to reproduce the disturbed situation multiple times, the test process is controllable, and after multiple tests, accurate and reliable data for functional safety evaluation of the automobile is provided. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is an overhead structure schematic diagram of an embodiment of the automobile front and rear axle disturbance device in use.

[0023] Fig. 2 It is an overhead structure schematic diagram of the disturbance device in an embodiment of the automobile front and rear axle disturbance device.

[0024] Fig. 3 It is an exploded structure schematic diagram of the disturbance device in an embodiment of the automobile front and rear axle disturbance device.

[0025] Fig. 4 It is a three-dimensional structure schematic diagram of an embodiment of the automobile front and rear axle disturbance device in use.

[0026] Fig. 5 It is a side view structure schematic diagram of an embodiment of the automobile front and rear axle disturbance device in use.

[0027] Fig. 6 It is a local enlarged schematic diagram of the sliding table position in an embodiment of the automobile front and rear axle disturbance device. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present application, which further describes the technical solutions of the present application, but the present application is not limited to these embodiments.

[0029] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement and steps of the modules and steps set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated.

[0030] At the same time, it should be understood that, in order to facilitate description, the flow in the drawings is not only carried out separately, but also multiple steps are carried out in cross.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0033] Techniques, methods, and systems known to a person skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the license specification.

[0034] Example 1: As Figs. 1 to 6 As shown, this is only one embodiment of the present invention. A vehicle front and rear axle disturbance device includes a base 2, a slide 3 disposed on the base 2, and an actuator 7 connected to the slide 3. The slide 3 is provided with a friction plate 4.

[0035] First, let's explain the disturbance device. The disturbance device is just a tool structure set up on the vehicle lane to serve the vehicle's anti-disturbance stability test. The completion of the vehicle anti-disturbance stability test also requires a large number of automotive sensors to be installed on the vehicle. Before the vehicle undergoes anti-disturbance stability testing, it also needs to be tested by the factory's testing equipment. Thus, the disturbance device, automotive sensors, and factory testing equipment together constitute the vehicle's front and rear axle disturbance stability test.

[0036] In other words, the factory's testing equipment acquires the original parameters of the car, then the car is driven through the disturbance simulation of the aforementioned disturbance equipment, and finally, based on the car's sensor equipment, the driving parameters of the car after the disturbance are obtained, thus obtaining the test parameters of the front and rear axle disturbance stability of the car.

[0037] The main purpose is to test whether a car will veer off course or even overturn when it is traveling at a certain speed on a certain road surface and when it is subjected to a certain amount of lateral disturbance impact.

[0038] Considering that vehicle sensing equipment and factory testing equipment are existing and mature equipment systems, the aforementioned disturbance device is an independently designed and original structure. This invention mainly describes the aforementioned disturbance device.

[0039] The above disturbance device is used to simulate disturbance as follows:

[0040] The automobile 1 to be tested is driven to the friction plate 4, the actuator 7 is driven to extend and retract, the sliding table 3 is driven to move in a direction perpendicular to the driving direction of the automobile, and the automobile in driving is simulated to be disturbed in the lateral direction.

[0041] In fact, before the disturbance device simulates disturbance, the automobile and the disturbance device need to be limited, first of all, it is necessary to ensure that the automobile can safely drive without mechanical failure to interfere with the test, secondly, the above disturbance device needs to be installed on the test road 8 of the automobile to be tested, and finally, the automobile needs to be controlled to pass through the above disturbance device at a preset speed in a straight line, and the disturbance simulation of the disturbance device is carried out; similarly, after the disturbance device simulates disturbance, the automobile needs to be controlled to simulate operation, that is, the automobile is decelerated and stopped in a manner that the preset brake degree and the preset steering wheel adjustment angle are not greater than the preset brake degree and the preset steering wheel adjustment angle, and finally the test data of the automobile after disturbance can be obtained.

[0042] In summary, after the automobile maintains a stable state of uniform speed, the actuator 7 is driven to work when the automobile passes through the disturbance device, the sliding table 3 is driven to move in a direction perpendicular to the driving direction of the automobile, and the automobile is simulated to be disturbed in the lateral direction, for example, the sliding table 3 moves to the left at a speed V, which is equivalent to the automobile being disturbed by a left speed V (impacting the position of the automobile axle); in this way, the automobile will not be actually impacted and will not be damaged, and the automobile disturbance data is accurate and can be reproduced multiple times, and the controllability is high.

[0043] The automobile front and rear axle disturbance device of the application applies lateral displacement to the sliding table on the automobile driving lane, thereby simulating the lateral disturbance of the automobile axle, evaluating the disturbance stability of the automobile, reducing the test consumption, ensuring the safety of the test, effectively quantifying the impact external parameter value, and repeatedly simulating the disturbed situation, controlling the test process, and providing accurate and reliable data for the functional safety evaluation of the automobile through multiple tests.

[0044] Embodiment two, still as Figs. 1 to 6 shown, only one embodiment of the application, on the basis of embodiment one, the automobile front and rear axle disturbance device of the application has limitations, because the test structure is installed on the lane, only the wheels of the automobile contact the test structure when the automobile passes through, and only the disturbance of the axle can be simulated, and the disturbance stability test of positions other than the two axles cannot be simulated.

[0045] In the application, the base 2 is arranged on the road 8 to be tested, and here, there are two installation methods:

[0046] The first type is used for testing cars of normal quality. The entire disturbance device is thin enough, with the thickness of the base 2, slide 3 and friction plate 4 not exceeding 2mm. In this way, the height difference between the friction plate 4 and the road surface is not greater than 9mm, which allows cars to pass through normally for testing.

[0047] In this way, the entire disturbance device can be installed in any location and at any time, enabling rapid deployment of vehicle disturbance testing. The thickness introduces minimal error, which will hardly affect the test results. It can be flexibly arranged in the turning and straight sections of the lane. Installation and disassembly are convenient, requiring no fixed pits. Simply remove the device and pull out the collision bolts to restore it, with almost no impact on the road surface.

[0048] The second type is used for testing larger mass cars. If the entire disturbance device is too thin, the test stability cannot be guaranteed. The thickness of the disturbance device needs to be appropriately increased. Or, for high-speed racing cars with extremely high precision requirements, arbitrary test height errors cannot be tolerated. In this case, a groove needs to be opened on the road surface to form an installation pit. The entire disturbance device is placed into the groove of the installation pit so that the upper surface of the friction plate of the disturbance device is flush with the road surface.

[0049] For testing of heavier vehicles, the base 2 is provided with a limiting block to restrict the position of the slide 3, so that the slide 3 is not affected by the vehicle running over it and slides along the vehicle's direction of travel, but can only move in a direction perpendicular to the vehicle's direction of travel under the limitation of the limiting block and the traction of the actuator 7.

[0050] A buffer pad 6 is provided between the base 2 and the road surface 8 (or the bottom of the installation pit). This is because protrusions of varying sizes on the site may cause the equipment base 2 to be partially lifted, preventing it from making reliable contact with the road surface 8 over a large area and resulting in deformation. The buffer pad 6 (elastic plastic) between the equipment base 2 and the road surface 8 ensures reliable contact and provides cushioning. The base 2 is equipped with fixing ears 201 for connecting to the road surface 8. The base 2 is fixed to the road surface 8 or the bottom of the installation pit by attaching expansion bolts to the fixing ears 201.

[0051] The actuator 7 is provided with a mounting base 701 for connecting to the road surface 8 to be tested. The actuator 7 is one of a hydraulic cylinder, an electric cylinder, and a pneumatic cylinder. A sensor 702 for real-time measurement of the extension length of the actuator 7 is provided at the end of the actuator 7 away from the slide table 3. A reinforcing connecting seat 301 is provided on the slide table 3. The extension rod of the actuator 7 is connected to the reinforcing connecting seat 301 by a connecting bolt 703. The actuator 7 is fixed to the road surface 8 by expansion bolts that secure the mounting base 701. The sensor 702 is used to measure the extension length of the actuator 7. The sensor 702 is used to measure the extension length of the actuator 7 in real time. The extension rod of the actuator 7 is connected to the slide table reinforcement connecting seat 301 on the slide table 3. The extension rod extends and retracts, causing the slide table 3 to slide. The slide table reinforcement connecting seat 301 is welded from multiple reinforcing ribs and steel plates to ensure the overall strength and uniform force distribution of the slide table 3. The sensor 702 can be an embedded displacement sensor or an encoder, depending on the type of actuator 7. It measures the extension rod length of the actuator 7 in real time by direct measurement or conversion, and obtains the extension speed of the actuator 7 by differentiation, and obtains the extension acceleration of the actuator 7 by differentiation of differentiation.

[0052] Furthermore, the upper surface of the friction plate 4 is provided with anti-slip texture. The friction plate 4 is used to increase the friction with the tire of the tested car 1. Preferably, the friction plate 4 is a sheet-like body with protruding and concave features, which is pasted on the upper surface of the slide table 3. The material and shape can be changed to control the coefficient of friction.

[0053] Conversely, the side of the slide 3 near the base 2 and the side of the base 2 near the slide 3 are both smooth. In fact, the contact surface between the slide 3 and the base 2 is smooth. It can be provided with a lubricated surface or with grease applied, so that the slide 3 and the base 2 can slide with low friction.

[0054] Furthermore, the length of the slide 3 and the friction plate 4 is not less than the width of the vehicle 1, ensuring that the two tires of the vehicle axle can be laterally disturbed on the friction plate 4 at the same time.

[0055] Finally, the base 2 and the slide 3 are high-strength steel parts, and the friction plate 4 is a sheet-like body with strong anti-slip characteristics that is attached to the slide 3, or has a high-strength anti-slip coating.

[0056] Example 3, still as Figs. 1 to 6 The above is only one embodiment of the present invention. Based on any of the above embodiments, the present invention provides a vehicle front and rear axle disturbance device, which further includes a speed measuring device 5 disposed on the base 2 near the front of the vehicle 1 as it approaches; the speed measuring device 5 is a laser speed measuring device.

[0057] When the speedometer 5 detects the car 1, the actuator 7 extends and retracts, thereby causing the slide 3 to move in a direction generally perpendicular to the direction of the car's travel.

[0058] The base 2 is set on the road surface 8, and the laser speed detector 5 is installed in front of the car, at a distance L2 from the edge of the device, at a height lower than any position of the car chassis, that is, only the tires can trigger the laser speed detector 5. The laser speed detector 5 is used to measure the speed of the car, which facilitates the preparation and movement triggering of the device.

[0059] The laser speedometer 5 is set at a distance from the device LS1. This distance is adjustable, but it needs to be input into the device to calculate the delay trigger time of the device's action. If the measured vehicle speed is V, then the device's trigger motion delay time is: t=LS1 / V.

[0060] There are three ways to apply lateral disturbances to the laser velocimeter trigger device: single front axle disturbance, single rear axle disturbance, and disturbances in both the front and rear axles. If only the front axle is disturbed, only the front axle time-displacement target value curve needs to be input into the device. When the car first triggers the speed measuring device (front wheel trigger), the device will trigger a front axle time-displacement target movement once when the front axle passes the laser speed measuring device 5. No movement occurs when the rear wheels pass. If only the rear wheels are disturbed, only the rear axle time-displacement target value curve needs to be input into the device. When the front wheels pass the laser speed measuring device 5, the device will be triggered once without any action. Only when the rear axle passes, i.e., the laser speed measuring device 5 is triggered for the second time, will the device be triggered by the signal from the laser speed measuring device 5 to move the rear axle time-displacement target value curve. If alternating triggering of both axles is required, both the front and rear axle time-displacement target value curves need to be input at the beginning. When the laser speed measuring device 5 is triggered for the first time, it outputs a trigger signal to trigger the device to execute the front axle time-displacement target value curve. When it is triggered for the second time (rear wheel trigger), it executes the rear axle time-displacement target value curve. This allows for three triggering methods.

[0061] Method for acquiring the disturbance forces applied to the front and rear axles of the car: Before the experiment, the time-displacement target value curve is input into the equipment. Overall control logic of the equipment: The laser velocimeter 5 is installed at a distance of LS1 from the equipment. This distance is measured using a tool and input into the equipment to delay the triggering of the equipment movement upon receiving the trigger signal from the laser velocimeter 5. Based on the above-set triggering method and triggering time-displacement curve, the equipment applies lateral disturbances to the car using three different triggering methods.

[0062] In other words, the present invention provides a vehicle front and rear axle disturbance device comprising an assembly structure 9 and a speedometer 5 (e.g., Fig. 5 As shown), the assembly structure includes the aforementioned base 2, slide 3, friction plate 4, and actuator 7.

[0063] Finally, the number of slides 3 is at least one. In fact, the number of the above-mentioned assembly structures 9 is at least one. It can be one assembly structure 9 to facilitate single-axis (front axle or rear axle) interference simulation, or it can be two or more assembly structures 9 to facilitate dual-axis (front axle and rear axle) interference simulation.

[0064] Example 4, still as Figs. 1 to 6 The above illustration is only one embodiment of the present invention. Based on any of the above embodiments, the present invention provides a vehicle front and rear axle disturbance device. During disturbance testing, after the vehicle has undergone one test, in order to ensure the accuracy of the test and reduce the influence of errors (such as wind speed, uneven road surface), the test should be repeated multiple times to reproduce the test data. By analyzing the vehicle driving data after driving and being disturbed, such as lane departure value, maximum lateral drift value, etc., the vehicle axle disturbance stability capability parameters of the vehicle can be obtained.

[0065] Furthermore, by using the controlled variable method, parameters such as the car's mass, the location of the disturbance, the initial velocity at the time of the disturbance, the impulse of the disturbance, and the adjustment amount after the disturbance can be changed to test the impact of these parameters on the car's disturbance stability. Of course, those skilled in the art will readily realize that other variables can also be controlled for testing, such as changing the road surface (asphalt or cement road, uphill or downhill), changing the car's tire model, changing the car's power method, etc. After multiple tests, the disturbance parameters of the car can be obtained.

[0066] This invention discloses a vehicle front and rear axle disturbance device. It applies lateral displacement to the vehicle's axle via a slide table on the vehicle's driving lane, thereby simulating the lateral disturbance scenario of the vehicle's axle and evaluating the vehicle's disturbance resistance stability. This not only reduces testing costs but also ensures safer testing. Furthermore, it can effectively quantify the impact external parameter values ​​to reproduce the disturbance scenario multiple times. The testing process is controllable, and multiple tests can be conducted to provide accurate and reliable data for the functional safety assessment of the vehicle.

[0067] The foregoing description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A vehicle front and rear axle disturbance device, characterized in that: It includes a base (2), a slide (3) disposed on the base (2) and an actuator (7) connected to the slide (3), wherein a friction plate (4) is disposed on the slide (3); When the car (1) to be tested is driven to the position of the wheel on the friction plate (4), the actuator (7) is driven to extend and retract, thereby causing the slide (3) to move in a direction that is generally perpendicular to the direction of the car's travel, so as to simulate the lateral disturbance of the car in motion.

2. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The base (2) is set on the road surface (8) to be tested. The base (2) is provided with a fixing ear (201) for connecting with the road surface (8), and a buffer pad (6) is provided between the base (2) and the road surface (8).

3. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The actuator (7) is provided with a mounting base (701) for connecting to the road surface (8) to be tested. The actuator (7) is one of a hydraulic cylinder, an electric cylinder, and a pneumatic cylinder. A sensor (702) for measuring the extension length of the actuator (7) in real time is provided at the end of the actuator (7) away from the slide table (3).

4. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The slide (3) is provided with a reinforcing connecting seat (301); the extension rod of the actuator (7) is connected to the reinforcing connecting seat (301) by a connecting bolt (703).

5. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The friction pad (4) has anti-slip texture on its upper surface.

6. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The side of the slide (3) near the base (2) and the side of the base (2) near the slide (3) are both smooth.

7. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The thickness of the base (2), slide (3) and friction plate (4) is no greater than 2mm; the length of the slide (3) and friction plate (4) is no less than the width of the car (1).

8. The automotive front and rear axle disturbance device according to claim 1, characterized in that: It also includes a speed measuring device (5) installed on the base (2) in front of the car (1) as it approaches; When the speedometer (5) detects the car (1), the actuator (7) extends and retracts, thereby causing the slide (3) to move in a direction generally perpendicular to the direction of the car's travel.

9. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The number of the slides (3) is at least one.

10. The automotive front and rear axle disturbance device according to claim 1, characterized in that: The base (2) is provided with a limiting block for limiting the position of the slide (3).

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