Barrier trolley with vertical dynamic response characteristic

Abstract

The utility model belongs to the technical field of automobile crash test equipment, and particularly relates to a barrier trolley with a vertical dynamic response characteristic, which comprises a trolley frame, and a wheel assembly, a brake control system and a suspension system which are assembled on the trolley frame, and the suspension system is used for providing the vertical dynamic response characteristic for the trolley frame. Comprising an upper suspension mounting plate, a shock absorber assembly, a tire mounting plate and a lower suspension mounting plate, one end of the upper suspension mounting plate is fixed to a trolley frame, the other end of the upper suspension mounting plate is fixedly mounted to the shock absorber assembly, the middle of the tire mounting plate is fixed to a wheel assembly, one end of the tire mounting plate is fixedly mounted to the shock absorber assembly, and the other end of the tire mounting plate is fixedly mounted to the lower suspension mounting plate. And the suspension lower mounting plate is fixed on the trolley frame. According to the utility model, the problem that collision test results are affected due to lack of vertical dynamic response of the barrier trolley in the prior art can be solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of automobile collision test equipment, and in particular relates to a barrier trolley with vertical dynamic response characteristics. Background Technology

[0002] In vehicle crash tests, accurately simulating the real process of a vehicle collision is crucial for obtaining reliable data. As a key component connecting the wheels and the vehicle body, the vehicle suspension not only absorbs driving vibrations but also effectively controls the vehicle's posture. Its performance directly affects the overall performance of the vehicle. When a vehicle collides, due to inertia, the front suspension is compressed instantly, while the rear suspension is stretched, resulting in a nose-diving effect.

[0003] However, the barrier trolleys currently used in crash tests have obvious defects; existing barrier trolleys are generally not equipped with suspension systems, and the wheels are rigidly connected to the vehicle body. This makes it impossible for barrier trolleys to accurately simulate the dynamic characteristics of a real vehicle collision in crash tests. As a result, the dynamic response, structural intrusion, and occupant injury of the target vehicle after being hit by the barrier and the real vehicle are different from those in the actual collision.

[0004] In addition, the terrain conditions of the test site are not entirely consistent, with local differences in flatness and roughness. Without a suspension system, the obstacle course trolley struggles to filter vibrations caused by uneven road surfaces, making it prone to bouncing during operation. This severely affects the accuracy and consistency of the test results. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a barrier trolley with vertical dynamic response characteristics, so as to solve the problem that the lack of vertical dynamic response in the existing barrier trolley affects the collision test results.

[0006] The basic solution provided by this utility model is as follows: an obstacle trolley with vertical dynamic response characteristics, including a trolley frame, wheel assemblies, a braking control system, and a suspension system. The wheel assemblies are mounted on the trolley frame to support and drive the trolley frame. The braking control system is mounted in the trolley frame and includes a brake controller and a brake actuator. The brake controller is used to send and receive control commands, the brake actuator is mounted on the wheel assemblies, and the brake actuator is used to receive braking control commands from the brake controller and thus control the operating state of the wheel assemblies. The suspension system is mounted on the trolley frame to provide vertical dynamic response characteristics for the trolley frame.

[0007] The suspension system includes an upper suspension mounting plate, a shock absorber assembly, a tire mounting plate, and a lower suspension mounting plate. One end of the upper suspension mounting plate is fixed to the trolley frame, and the other end is fixedly installed to the shock absorber assembly. The middle part of the tire mounting plate is fixed to the wheel assembly, one end of which is fixedly installed to the shock absorber assembly, and the other end is fixedly installed to the lower suspension mounting plate. The lower suspension mounting plate is fixed to the trolley frame.

[0008] Furthermore, the shock absorber assembly includes a hydraulic damper and an external helical spring. The hydraulic damper is located inside the helical spring, and the top of the helical spring is provided with a spring preload adjustment knob.

[0009] Furthermore, the bottom of the upper mounting plate of the suspension and the fixing point of the tire mounting plate and shock absorber assembly are provided with standardized interfaces.

[0010] Furthermore, the tire mounting plate is hinged to the lower suspension mounting plate via a rotary bearing; the rotary bearing is a self-lubricating spherical bearing.

[0011] Furthermore, it also includes a collision block mounting plate, which is installed at the front end of the trolley frame and is used to install a honeycomb aluminum barrier.

[0012] Furthermore, it also includes a counterweight, which includes a large counterweight and a small counterweight. The large counterweight is located at the rear end of the trolley frame, and the small counterweight is located at the bottom middle of the trolley frame.

[0013] Furthermore, it also includes a camera mounting bracket, which includes a camera mounting plate and a fixing frame. The fixing frame is located at the front end of the top of the trolley frame and is fixedly installed to the trolley frame. The camera mounting plate is located on the upper surface of the fixing frame.

[0014] The principle and advantages of this utility model are as follows: In the technical solution of this application, an independent suspension system is equipped on the basis of the existing obstacle trolley. The suspension system adopts a simple structural design of upper suspension mounting plate, lower suspension mounting plate, shock absorber assembly, and tire mounting plate. On the one hand, it reduces costs. On the other hand, under the action of the above suspension system, the wheel assembly of the trolley frame is impacted, which is transmitted to the tire mounting plate, and then to the shock absorber assembly for compression. Then the load is distributed to the frame through the upper and lower suspension mounting plates, thereby realizing the vertical load transmission process. This enables the obstacle trolley to have a vertical dynamic response, further accurately simulating the real process of a real vehicle collision and reflecting the dynamic response of a real vehicle collision. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the barrier trolley structure according to an embodiment of the present utility model;

[0016] Figure 2This is a schematic diagram of the suspension system structure according to an embodiment of the present utility model. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The markings in the accompanying drawings include: 1. Trolley frame; 2. Wheel assembly; 3. Braking control system; 4. Suspension system; 401. Suspension mounting plate; 402. Shock absorber assembly; 4021. Hydraulic damper; 4022. Coil spring; 4023. Spring preload adjustment knob; 5. Collision block mounting plate; 6. Counterweight; 7. Camera mounting bracket; 701. Camera mounting plate; 702. Fixture.

[0019] The basic implementation examples are as follows: Figure 1 As shown: A barrier trolley with vertical dynamic response characteristics includes a trolley frame 1, a wheel assembly 2, a braking control system 3, and a suspension system 4. The wheel assembly 2 is mounted on the trolley frame 1. Specifically, the wheel assembly 2 includes four wheels, which are respectively installed on both sides of the trolley frame 1. On the one hand, the wheels support the trolley frame 1, and on the other hand, they can drive the trolley frame 1 to run.

[0020] The braking control system 3 is mounted on the trolley frame 1. In this embodiment, the braking control system 3 includes a braking controller and a braking actuator, along with a sensor group to control the obstacle trolley. Specifically, the sensor group is installed on the trolley frame 1. For example, the speed sensor is installed on the wheel axle of the wheel assembly 2, and the position sensor is installed on the test site to ensure that the obstacle trolley brakes in the appropriate position. The braking controller uses a high-performance microprocessor to receive signals from the sensor group, such as the real-time speed of the trolley fed back by the speed sensor and the position of the trolley provided by the position sensor. It then processes these signals and sends precise control commands to the braking actuator. The braking actuator includes a brake and a braking booster. The brake is installed on the wheel and acts directly on the wheel to slow down or stop the wheel from rotating. The braking booster increases the braking force when the trolley has a large mass or when emergency braking is required.

[0021] like Figure 2As shown, the suspension system 4 is mounted on the trolley frame 1 to provide vertical dynamic response characteristics for the trolley frame 1. Specifically, the suspension system 4 includes an upper suspension mounting plate 401, a shock absorber assembly 402, a tire mounting plate, and a lower suspension mounting plate. The top of the upper suspension mounting plate 401 is fixed to the trolley frame 1, and the bottom has a standardized interface for fixed installation with the shock absorber assembly 402. The middle part of the tire mounting plate is fixed to the wheel assembly 2, specifically to the axle of the wheel in the wheel assembly 2, using bolts. One end of the tire mounting plate is fixedly connected to the shock absorber assembly 402, and this application uses a standardized interface for fixing to the shock absorber assembly 402. The other end of the tire mounting plate is fixedly installed to the lower suspension mounting plate, specifically using a rotary bearing hinged to the lower suspension mounting plate, wherein the rotary bearing is a self-lubricating spherical bearing. The lower suspension mounting plate is fixed to the trolley frame 1.

[0022] Furthermore, in this application, the shock absorber assembly 402 includes a hydraulic damper 4021 and an external coil spring 4022. The hydraulic damper 4021 is located inside the coil spring 4022, and a spring preload adjustment knob 4023 is provided at the top of the coil spring 4022. Therefore, during installation, both ends of the coil spring 4022 are fixed to the hydraulic damper 4021, the top end of the hydraulic damper 4021 is engaged and fixed with the standardized interface of the suspension mounting plate 401, and the bottom end of the hydraulic damper 4021 is engaged and fixed with the standardized interface on the tire mounting plate. At the same time, the spring preload adjustment knob 4023 is provided at the top of the coil spring 4022 to limit the adjustability of the shock absorber, highlight the dynamic adaptability, and enhance the testing flexibility.

[0023] In addition, it also includes a collision block mounting plate 5, a counterweight 6, and a camera mounting bracket 7. The collision block mounting plate 5 is installed at the front end of the trolley frame 1 and is used to install the honeycomb aluminum barrier. The counterweight 6 includes a large counterweight and a small counterweight. The large counterweight is located at the rear end of the trolley frame 1, and the small counterweight is located at the bottom middle part of the trolley frame 1. In this application, both the large and small counterweights are used to adjust the mass distribution of the barrier trolley so that the mass of the barrier trolley is precisely controlled within the set range.

[0024] The camera mounting bracket 7 includes a camera mounting plate 701 and a fixing bracket 702. The fixing bracket 702 is located at the top front end of the trolley frame 1 and is fixedly installed on the trolley frame 1. The camera mounting plate 701 is located on the upper surface of the fixing bracket 702, and the camera is then fixed to the camera mounting plate 701. In this way, the fixing bracket 702 enables the camera mounting plate 701 on it to meet the requirements for collision shooting.

[0025] The specific implementation process is as follows: When installing the barrier trolley, after assembling the wheel assembly 2, braking control system 3, engine, suspension system 4, collision block mounting plate 5, counterweight 6, and camera mounting bracket 7 with the trolley frame 1, the honeycomb aluminum barrier is installed on the collision block mounting plate 5, the camera is fixed to the camera mounting bracket 7, and the engine is started to control the barrier trolley to start. During the operation of the barrier trolley, its vertical dynamic response characteristics are characterized as follows: the impact on the wheels is transmitted to the tire mounting plate, and then compressed by the shock absorber. The load is distributed to the trolley frame 1 through the upper and lower mounting plates of the suspension. In this way, the real collision process of the barrier trolley in the collision test is realized, and the accuracy of the test results is improved.

[0026] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A barrier trolley with vertical dynamic response characteristics, characterized in that: The system includes a trolley frame, wheel assemblies, a braking control system, and a suspension system. The wheel assemblies are mounted on the trolley frame to support and move the trolley frame. The braking control system is mounted in the trolley frame and includes a brake controller and a brake actuator. The brake controller sends and receives control commands, and the brake actuator is mounted on the wheel assemblies to receive braking control commands from the brake controller and control the operating state of the wheel assemblies. The suspension system is mounted on the trolley frame to provide vertical dynamic response characteristics for the trolley frame. The suspension system includes an upper suspension mounting plate, a shock absorber assembly, a tire mounting plate, and a lower suspension mounting plate. One end of the upper suspension mounting plate is fixed to the trolley frame, and the other end is fixedly installed to the shock absorber assembly. The middle part of the tire mounting plate is fixed to the wheel assembly, one end of which is fixedly installed to the shock absorber assembly, and the other end is fixedly installed to the lower suspension mounting plate. The lower suspension mounting plate is fixed to the trolley frame.

2. The obstacle-blocking trolley with vertical dynamic response characteristics according to claim 1, characterized in that: The shock absorber assembly includes a hydraulic damper and an external helical spring. The hydraulic damper is located inside the helical spring, and the top of the helical spring is provided with a spring preload adjustment knob.

3. The obstacle-blocking trolley with vertical dynamic response characteristics according to claim 2, characterized in that: The bottom of the upper mounting plate of the suspension and the fixing points of the tire mounting plate and shock absorber assembly are equipped with standardized interfaces.

4. The obstacle-blocking trolley with vertical dynamic response characteristics according to claim 3, characterized in that: The tire mounting plate is hinged to the lower suspension mounting plate via a rotary bearing; the rotary bearing is a self-lubricating spherical bearing.

5. A barrier trolley with vertical dynamic response characteristics according to claim 4, characterized in that: It also includes a collision block mounting plate, which is installed at the front end of the trolley frame and is used to install a honeycomb aluminum barrier.

6. The obstacle-blocking trolley with vertical dynamic response characteristics according to claim 5, characterized in that: It also includes counterweights, which include a large counterweight and a small counterweight. The large counterweight is located at the rear end of the trolley frame, and the small counterweight is located at the bottom middle part of the trolley frame.

7. A barrier trolley with vertical dynamic response characteristics according to claim 6, characterized in that: It also includes a camera mounting bracket, which includes a camera mounting plate and a fixing frame. The fixing frame is located at the top front end of the trolley frame and is fixedly installed to the trolley frame. The camera mounting plate is located on the upper surface of the fixing frame.

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