Road simulation device for multi-axle vehicle excitation

Abstract

The invention discloses a road simulation device for multi-axle vehicle excitation, which comprises two groups of excitation assemblies which are oppositely arranged in parallel, and is characterized in that one group of excitation assembly comprises three exciters which are arranged at intervals and bearing mechanisms which are arranged at the tops of the exciters; the bearing mechanism comprises a first bearing assembly, a second bearing assembly and a third bearing assembly, the second bearing assembly and the third bearing assembly are movably connected to the two ends of the first bearing assembly respectively, the second bearing assembly and the third bearing assembly are slidably connected with the top of the vibration exciter, and the first bearing assembly is fixedly connected with the top of the vibration exciter. When the vibration exciters work, the tops of the vibration exciters carry out vibration excitation on the bearing mechanism, the design can effectively solve the problem that one vibration exciter is placed below each wheel when vibration excitation is carried out on the multi-axle vehicle, and the experiment cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle road simulation, and in particular to a road simulation device for multi-axle vehicle excitation. Background Art

[0002] Multi-axle vehicles are widely used and often need to travel on complex roads and be in different vibration environments. Therefore, it is necessary to conduct vibration environment simulation experiments on the entire vehicle to evaluate the various performance indicators of the vehicle under complex driving conditions and provide data for subsequent improvements.

[0003] At present, there are two main methods for multi-axle vehicle testing: road testing and indoor bench testing. The experimental results of road testing are the most realistic, but it requires a large-scale site and the paving of various different road surfaces, which will consume a lot of manpower and material resources, and the experimental cost is huge. Indoor bench testing can more accurately reproduce the load and vibration excitation of the vehicle when it is driving on the road, and can provide a controllable and repeatable load and vibration environment that is close to the actual driving conditions. Therefore, in practical applications, multi-axle vehicles often use indoor bench testing. The current method of indoor bench testing is to install an exciter under each wheel of the vehicle to achieve individual excitation of each wheel to simulate road driving conditions, which can achieve better experimental results.

[0004] However, this method has its shortcomings. First, for some smaller multi-axle vehicles, the wheel track is smaller than the minimum center distance required for the arrangement of the exciters, and it is impossible to place an exciter under each wheel. Second, if there are a large number of wheels, the same number of exciters is required to fully excite all wheels, which greatly increases the experimental cost. Summary of the invention

[0005] In order to solve the technical defects raised in the above-mentioned background technology, an embodiment of the present application provides a road simulation device for exciting a multi-axle vehicle, which can effectively solve the problem of avoiding placing an exciter under each wheel when exciting a multi-axle vehicle, thereby reducing the experimental cost.

[0006] The present invention adopts the following technical solution: An embodiment of the present invention provides a road simulation device for multi-axle vehicle excitation, comprising two groups of excitation components arranged relatively parallel, wherein one group of the excitation components comprises three exciters arranged in an interval arrangement and a bearing mechanism arranged on the top of each of the exciters, the bearing mechanism comprises a first bearing component and a second bearing component and a third bearing component respectively movably connected to the two ends of the first bearing component, the second bearing component and the third bearing component are slidably connected to the top of the exciter, the first bearing component is fixedly connected to the top of the exciter, and when the exciter is working, the top of each of the exciters excites the bearing mechanism.

[0007] Optionally, the first bearing assembly includes two intermediate frames fixedly arranged on the top of the exciter and a first connecting shaft and a second connecting shaft connected between the two intermediate frames, and a first fixing plate is also fixedly connected between the two intermediate frames.

[0008] Optionally, the second supporting assembly includes two first sliding plates slidably arranged on the top of the exciter and a first supporting plate arranged on the top of the first sliding plates, a first rotating shaft is rotatably connected between the two first sliding plates, one end of the first supporting plate is rotatably connected to the first rotating shaft, and the other end of the first supporting plate is rotatably connected to the first connecting shaft.

[0009] Optionally, the third supporting assembly includes two second sliding plates slidably arranged on the top of the exciter and a second supporting plate arranged on the top of the second sliding plates, a second rotating shaft is rotatably connected between the two second sliding plates, one end of the second supporting plate is rotatably connected to the second rotating shaft, and the other end of the second supporting plate is rotatably connected to the second connecting shaft.

[0010] Optionally, a plurality of fixing blocks are provided on the first bearing plate and the second bearing plate, and the fixing blocks are used for fixing the multi-axle vehicle when the multi-axle vehicle is vibrated.

[0011] Optionally, the vibration exciter includes a base, a cylinder connected to the top of the base, and a movable rod telescopic in the cylinder, a tray is also provided on the top of the movable rod, and the supporting mechanism is connected to the tray.

[0012] Optionally, a guide block for sliding the second bearing assembly and / or the third bearing assembly is provided on the tray, and a slide rail is provided at the bottom of the first sliding plate and the second sliding plate, and the slide rail slides in the guide block.

[0013] Optionally, a workbench is further included, wherein the workbench is arranged at the bottom of the vibrator, and the distance between each vibrator can be adjusted through the workbench.

[0014] Optionally, a plurality of guide grooves are spaced apart on the workbench, and each of the vibration exciters moves through the guide grooves to adjust the distance between each of the vibration exciters.

[0015] Optionally, a guide plate is installed at the bottom of the exciter, and the exciter is detachably mounted on the workbench through the guide plate.

[0016] In summary, the beneficial effects of the present invention are: By setting up two groups of relatively parallel excitation components, both sides of a multi-axle vehicle can be excited. The excitation component includes three exciters arranged at intervals and a bearing mechanism arranged on the top of each of the exciters. The wheels of the multi-axle vehicle can be loaded and excited, and can be adapted to multiple axes, thereby improving adaptability; it includes a first bearing component and a second bearing component and a third bearing component respectively movably connected to the two ends of the first bearing component, the second bearing component and the third bearing component are slidably connected to the top of the exciter, and the first bearing component is fixedly connected to the top of the exciter, so that when the three exciters are excited at different times, the bearing mechanism can simulate the ruggedness of the road, thereby being able to adapt to more wheels, solving the problem of complete excitation of all wheels of the multi-axle vehicle, reducing the number of exciters required for the experiment, enhancing the versatility of the road simulation experiment device, and reducing the experimental cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a structural diagram of an embodiment of the present invention; Figure 2 is a structural diagram of a set of excitation components in an embodiment of the present invention; Figure 3 The embodiment of the present invention Figure 2 A magnified image of area A; Figure 4 is a front view of a group of excitation components in an embodiment of the present invention; Figure 5 is a structural diagram of a bearing mechanism according to an embodiment of the present invention; Figure 6 is a working state diagram of an embodiment of the present invention; Figure 7 It is a working principle diagram of an embodiment of the present invention. Description of the drawings: 100, excitation assembly; 110, exciter; 111, base; 112, cylinder; 113, movable rod; 114, tray; 115, guide plate; 200, bearing mechanism; 210, first bearing assembly; 211, intermediate frame; 212, first connecting shaft; 213, second connecting shaft; 214, first fixed plate; 220, second bearing assembly; 221, first sliding plate; 222, first bearing plate; 223, first rotating shaft; 224, second fixed plate; 230, third bearing assembly; 231, second sliding plate; 232, second bearing plate; 233, second rotating shaft; 240, fixed block; 250, guide block; 260, workbench; 261, guide groove; 270, reset spring; 280, slide rail. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a road simulation device for multi-axle vehicle excitation, including two groups of excitation components 100 arranged relatively in parallel, wherein one group of the excitation components 100 includes three exciters 110 arranged in an interval arrangement and a supporting mechanism 200 arranged on the top of each of the exciters 110, the supporting mechanism 200 includes a first supporting component 210 and a second supporting component 220 and a third supporting component 230 respectively movably connected to the two ends of the first supporting component 210, the second supporting component 220 and the third supporting component 230 are slidably connected to the top of the exciter 110, the first supporting component 210 is fixedly connected to the top of the exciter 110, and when the exciter 110 is working, the top of each of the exciters 110 excites the supporting mechanism 200.

[0022] In an embodiment of the present invention, the above-mentioned excitation components 100 may include two groups, each group may be three, the two groups of excitation components 100 are arranged in parallel, the spacing between the two groups of excitation components 100 can be adjusted according to the wheel tracks on both sides of the vehicle, and each group of three excitation components 100 is arranged in a straight line, and a bearing mechanism 200 is arranged on the top of the three exciters 110. By setting the bearing mechanism 200, a multi-axle vehicle can be tested thereon, thereby achieving excitation, while the traditional method is to set the excitation components 100 according to the number of wheels, which has low adaptability and greatly increases the experimental cost. Therefore, two groups of excitation components 100 are used to provide vertical excitation loads for the wheels on both sides of the multi-axle vehicle respectively, and at the same time, a control module is set to convert the uneven elevation data of the ground into time domain vibration excitation of each exciter 110 at different vehicle speeds, and accurately load it to each exciter 110, thereby achieving excitation. Specifically, the supporting mechanism 200 may include a first supporting component 210, a second supporting component 220 and a third supporting component 230, wherein the first supporting component 210 is arranged between the second supporting component 220 and the third supporting component 230, and the three supporting components are arranged in a straight line, thereby facilitating vehicle testing. Specifically, the first bearing assembly 210 is disposed above the middle vibration assembly 100 as an intermediate piece, and the second bearing assembly 220 and the third bearing assembly 230 are movably connected to the first bearing assembly 210 in the middle. When the vibrator 110 is vibrating, the first bearing mechanism 200 is fixed above the middle vibration assembly 100, and the second bearing assembly 220 and the third bearing assembly slide above the vibrator 110. Therefore, when each vibrator 110 is vibrating the vehicle, the first bearing assembly 210, the second bearing assembly 220 and the third bearing assembly 230 can move with the vibrator 110, thereby simulating a rugged road and further vibrating the multi-axle vehicle, thus avoiding the traditional method of vibrating according to the wheels. Only three vibrators 110 are needed as a group to vibrate the multi-axle vehicle, which greatly reduces the experimental cost.

[0023] Optional, such as Figure 2 and Figure 5 As shown, the first bearing assembly 210 includes two intermediate frames 211 fixedly arranged on the top of the exciter 110 and a first connecting shaft 212 and a second connecting shaft 213 connected between the two intermediate frames 211. A first fixing plate 214 is also fixedly connected between the two intermediate frames 211.

[0024] In the embodiment of the present invention, the first bearing assembly 210 may include two intermediate frames 211, which are vertically fixed on the top of the exciter 110 and then connected by the first connecting shaft 212 and the second connecting shaft 213, so as to facilitate the connection between the second bearing assembly 220 and the third bearing assembly 230. At the same time, an axis frame is also provided between the first connecting shaft 212 and the second connecting shaft 213, and the first connecting shaft 212 and the second connecting shaft 213 are fixed by the axis frame, thereby further improving the stability of the first bearing assembly 210. Furthermore, first fixing plates 214 are also provided on both sides of the two intermediate frames 211, and the two intermediate frames 211 can be further fixed by providing the first fixing plates 214.

[0025] Optional, such as Figure 2 , Figure 4 as well as Figure 5 As shown, the second supporting assembly 220 includes two first sliding plates 221 slidably arranged on the top of the exciter 110 and a first supporting plate 222 arranged on the top of the first sliding plates 221, and a first rotating shaft 223 is rotatably connected between the two first sliding plates 221, one end of the first supporting plate 222 is rotatably connected to the first rotating shaft 223, and the other end of the first supporting plate 222 is rotatably connected to the first connecting shaft 212.

[0026] In an embodiment of the present invention, the second bearing assembly 220 may include two first sliding plates 221 and a first bearing plate 222. The two first sliding plates 221 are vertically and parallelly arranged on the top of the exciter 110. A first rotating shaft 223 is rotatably connected between the two first sliding plates 221. One end of the first bearing is rotatably connected to the first rotating shaft 223, and the other end of the first bearing plate 222 is rotatably connected to the first connecting shaft 212. In this way, the first bearing assembly 210 and the second bearing assembly 220 can be movably connected, so that the multi-axle vehicle can be conveniently excited.

[0027] Optional, such as Figure 2 , Figure 4 as well as Figure 5 As shown, the third supporting assembly 230 includes two second sliding plates 231 slidably arranged on the top of the exciter 110 and a second supporting plate 232 arranged on the top of the second sliding plates 231, and a second rotating shaft 233 is rotatably connected between the two second sliding plates 231, one end of the second supporting plate 232 is rotatably connected to the second rotating shaft 233, and the other end of the second supporting plate 232 is rotatably connected to the second connecting shaft.

[0028] In an embodiment of the present invention, the third bearing assembly 230 may include two second sliding plates 231 and a second bearing plate 232. The two second sliding plates 231 are vertically and parallelly arranged on the top of the exciter 110. A second rotating shaft 233 is rotatably connected between the two second sliding plates 231. One end of the second bearing plate 232 is rotatably connected to the second rotating shaft 233, and the other end of the second bearing plate 232 is rotatably connected to the second connecting shaft 213. In this way, the third bearing assembly 230 and the first bearing assembly 210 can be movably connected, so that the multi-axle vehicle can be conveniently excited.

[0029] In a possible embodiment, a return spring 270 may be sleeved on the first rotating shaft 223, the second rotating shaft 233, the first connecting shaft 212, and the second connecting shaft 213. The return spring 270 may be arranged between the first bearing plate 222, the second bearing plate 232 and the first sliding plate 221 and the second sliding plate 231, and the return spring 270 may also be arranged between the intermediate frame 211 and the first bearing plate 222 and the second bearing plate 232. Thus, when the vehicle is excited, friction between the first bearing plate 222 and the second bearing plate 232 and the first sliding plate 221, the second sliding plate 231, and the intermediate frame 211 can be prevented, thereby improving the accuracy of the excitation.

[0030] Two second fixing plates 224 are respectively provided in the second bearing assembly 220 and the third bearing assembly 230, and the two second fixing plates 224 are used to fix the first sliding plate 221 and the second sliding plate 231. During the experiment, when the multi-axle vehicle is tilted, a lateral impact is generated and transmitted to the first sliding plate 221 on one side of the sliding direction of the first bearing plate 222, causing a unilateral force. Since the second fixing plate 224 and the first fixing plate 214 of the intermediate frame 211 are respectively connected to the first sliding plates 221 and the intermediate frame 211 on both sides, the lateral impact is changed from a unilateral force to an overall force of the bearing mechanism 200, thereby improving the force condition of the transition excitation mechanism.

[0031] Optional, as shown Figure 5 As shown, a plurality of fixing blocks 240 are disposed on the first bearing plate 222 and the second bearing plate 232 , and the fixing blocks 240 are used for fixing when the multi-axle vehicle is excited.

[0032] In the embodiment of the present invention, a plurality of fixing blocks 240 are arranged on the first bearing plate 222 and the second bearing plate 232. The fixing blocks 240 are arranged at the edge of the first bearing plate 222. Four fixing blocks 240 are arranged on each of the first bearing plate 222 and the second bearing plate 232. By arranging the fixing blocks 240, the multi-axle vehicle can be fixed to prevent the vehicle from collapsing during vibration.

[0033] Optional, such as Figure 2 and Figure 4 As shown, the exciter 110 includes a base 111 , a cylinder 112 connected to the top of the base 111 , and a movable rod 113 telescopic in the cylinder 112 . A tray 114 is also provided on the top of the movable rod 113 , and the supporting mechanism 200 is connected to the tray 114 .

[0034] In the embodiment of the present invention, the vibration exciter 110 may include a base 111, a cylinder 112 and a movable rod 113, and may also include an oil storage bottle. The cylinder 112 may extend or retract the movable rod 113 in the form of oil pressure, thereby exciting the multi-axle vehicle. A tray 114 is arranged on the top of the movable rod 113, and the first bearing assembly 210, the second bearing assembly 220 and the third bearing assembly 230 are respectively located on the tray 114.

[0035] Optionally, a guide block 250 for sliding the second bearing assembly 220 and / or the third bearing assembly 230 is provided on the tray 114 , and a slide rail 280 is provided at the bottom of the first sliding plate 221 and the second sliding plate 231 , and the slide rail 280 slides in the guide block 250 .

[0036] In an embodiment of the present invention, a guide block 250 is arranged on the tray 114. The guide block 250 can be arranged at the edge of the tray 114 and correspond to the first sliding plate 221 and the second sliding plate 231. At the same time, a sliding rail 280 is arranged at the bottom of the first sliding plate 221 and the second sliding plate 231. The sliding rail 280 slides in the guide block 250 to form a sliding pair, so that the first sliding plate 221 and the second sliding plate 231 can slide in the guide block 250.

[0037] Optional, such as Figure 1 As shown, a workbench 260 is further included. The workbench 260 is disposed at the bottom of the vibrator 110 , and the spacing between the vibrators 110 can be adjusted through the workbench 260 .

[0038] The embodiment of the present invention also includes a workbench 260, and each vibrator 110 is arranged on the workbench 260. By arranging the workbench 260, each group of three vibrators 110 can be placed in a straight line, and the parallelism of the two groups of excitation components 100 can be ensured. At the same time, the distance between the vibrators 110 can be adjusted as needed.

[0039] Optionally, a plurality of guide grooves 261 are spaced apart on the workbench 260 , and each of the exciters 110 moves through the guide grooves 261 to adjust the distance between each of the exciters 110 .

[0040] In the embodiment of the present invention, a plurality of guide grooves 261 are spaced apart on the workbench 260 , and the distances between the exciters 110 can be adjusted through the guide grooves 261 .

[0041] Furthermore, a guide plate 115 is installed at the bottom of the vibration exciter 110 , and the vibration exciter 110 is detachably installed on the workbench 260 through the guide plate 115 .

[0042] In the embodiment of the present invention, a guide plate 115 is installed at the bottom of the exciter 110. The screws on the guide plate 115 are engaged in the guide groove 261, so that the distance between the two groups of exciters 110 can be adjusted to adapt to the wheelbase of different vehicles, thereby saving experimental costs.

[0043] In a possible embodiment, Figure 7 As shown, the control module can be connected to the exciter 110 and can include an adder, a servo amplifier, an electro-hydraulic servo valve, a displacement and acceleration sensor, and a feedback channel, and the accuracy of the excitation output of the exciter 110 is ensured by the dual feedback of the displacement and acceleration signals. The control module controls the exciter 110 to apply corresponding excitation according to the road surface spectrum, drives the transition excitation component 100 to move to simulate the rough road, and realizes the road excitation simulation of equivalent complete excitation of more than three axes and also applicable to multi-axle vehicles of smaller size with only two groups of three pairs of exciters 110. The prepared road surface spectrum, that is, the road surface input signal, is first processed by the adder, and the processed signal is amplified by the amplifier circuit in the servo amplifier and then input into the electro-hydraulic servo valve. The actuator in the exciter 110 outputs the corresponding excitation according to the input signal under the control of the electro-hydraulic servo valve and acts on the load. At the same time, the displacement and acceleration sensors collect the displacement and acceleration signals of the actuator in real time and feed them back to the adder. The processed and amplified signals are then input into the electro-hydraulic servo valve to control the movement of the actuator, thereby achieving dual feedback of displacement and acceleration to ensure the accuracy of the excitation output.

[0044] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0045] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A road simulation device for multi-axle vehicle excitation, characterized in that: The invention comprises two groups of vibration excitation components (100) arranged in parallel with each other, wherein one group of the vibration excitation components (100) comprises three vibration exciters (110) arranged in an interval arrangement and a bearing mechanism (200) arranged on the top of each vibration exciter (110), the bearing mechanism (200) comprising a first bearing component (210) and a second bearing component (220) and a third bearing component (230) respectively movably connected to two ends of the first bearing component (210), the second bearing component (220) and the third bearing component (230) being slidably connected to the top of the vibration exciter (110), the first bearing component (210) being fixedly connected to the top of the vibration exciter (110), and when the vibration exciter (110) is in operation, the top of each vibration exciter (110) excites the bearing mechanism (200).

2. A road simulation device for multi-axle vehicle excitation as claimed in claim 1, characterized in that The first bearing assembly (210) comprises two intermediate frames (211) fixedly arranged on the top of the exciter (110), and a first connecting shaft (212) and a second connecting shaft (213) connected between the two intermediate frames (211); a first fixing plate (214) is also fixedly connected between the two intermediate frames (211).

3. A road simulation device for multi-axle vehicle excitation as claimed in claim 2, characterized in that: The second bearing assembly (220) comprises two first sliding plates (221) slidably arranged on the top of the exciter (110) and a first bearing plate (222) arranged on the top of the first sliding plates (221); a first rotating shaft (223) is rotatably connected between the two first sliding plates (221); one end of the first bearing plate (222) is rotatably connected to the first rotating shaft (223); and the other end of the first bearing plate (222) is rotatably connected to the first connecting shaft (212).

4. A road simulation device for multi-axle vehicle excitation as claimed in claim 3, characterized in that The third bearing assembly (230) comprises two second sliding plates (231) slidably arranged on the top of the exciter (110) and a second bearing plate (232) arranged on the top of the second sliding plates (231), a second rotating shaft (233) is rotatably connected between the two second sliding plates (231), one end of the second bearing plate (232) is rotatably connected to the second rotating shaft (233), and the other end of the second bearing plate (232) is rotatably connected to the second connecting shaft.

5. A road simulation device for multi-axle vehicle excitation as claimed in claim 4, characterized in that: A plurality of fixing blocks (240) are provided on the first bearing plate (222) and the second bearing plate (232), and the fixing blocks (240) are used for fixing when the multi-axle vehicle is vibrated.

6. A road simulation device for multi-axle vehicle excitation as claimed in claim 4, characterized in that: The vibrator (110) comprises a base (111), a cylinder (112) connected to the top of the base (111), and a movable rod (113) telescopically arranged in the cylinder (112); a tray (114) is also arranged on the top of the movable rod (113); and the supporting mechanism (200) is connected to the tray (114).

7. A road simulation device for multi-axle vehicle excitation as claimed in claim 6, characterized in that: The tray (114) is provided with a guide block (250) for the second bearing assembly (220) and / or the third bearing assembly (230) to slide, and the bottom of the first sliding plate (221) and the second sliding plate (231) are provided with a slide rail (280), and the slide rail (280) slides in the guide block (250).

8. A road simulation device for multi-axle vehicle excitation as claimed in claim 7, characterized in that: It also comprises a workbench (260), wherein the workbench (260) is arranged at the bottom of the vibration exciters (110), and the spacing between the vibration exciters (110) can be adjusted via the workbench (260).

9. A road simulation device for multi-axle vehicle excitation as claimed in claim 8, characterized in that: A plurality of guide grooves (261) are spaced apart on the workbench (260), and each of the vibration exciters (110) moves through the guide grooves (261) to adjust the spacing between each of the vibration exciters (110).

10. A road simulation device for multi-axle vehicle excitation according to claim 9, wherein a guide plate (115) is installed at the bottom of the exciter (110), and the exciter (110) is detachably mounted on the workbench (260) via the guide plate (115).

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