Test trolley for collision test

Abstract

The invention relates to the technical field of automobile test trolleys, in particular to a crash test trolley which comprises a framework, the framework is of a rectangular structure provided with four chamfers, a cover plate is arranged at the top of the framework, and the cover plate and the framework are matched so that the four edges and the four corners of the rectangular structure can be of a slope structure; the linear driving mechanism is arranged at one end close to the framework and comprises a linear driving wheel, and the linear driving wheel is connected with a first servo motor through a belt wheel transmission mechanism; the steering driving mechanism is arranged close to the other end of the framework and comprises a steering wheel, the steering wheel is rotationally arranged on a movable seat, the movable seat is hinged to a fixed seat, the fixed seat is fixedly connected to the framework, and the steering wheel is further connected to a rotating wheel through a transmission rod; the framework and the cover plate form a streamline appearance together, impact force during collision can be obviously reduced, damage is prevented, and the trolley can steer stably when being impacted in the moving process through the steering driving mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of automobile test trolleys, in particular to a collision test trolley. Background Art

[0002] With the continuous development of automobile autonomous driving technology, the demand for testing of autonomous driving technology has also emerged. In the modern automobile industry and other fields involving high-speed sports products, safety is always a crucial consideration. As a key tool for evaluating the crashworthiness of products, the development of collision test vehicles has a deep background of practical needs. With the continuous advancement of science and technology and people's high attention to traffic safety, the performance requirements for vehicles and various sports products in collision situations are becoming more and more stringent.

[0003] Traditional collision tests mainly rely on real car collisions. In actual operation, the collision test vehicle will be impacted together with the vehicle being tested, which is prone to damage. The structural strength and energy absorption capacity of the vehicle need to be improved, and it is difficult to steer the vehicle when it is impacted. This project aims to develop a collision test vehicle to solve the above problems. Summary of the invention

[0004] In view of at least one of the above technical problems, the present invention provides a collision test vehicle, which adopts the following technical solution to solve the problem that the collision test vehicle proposed in the above background technology is easily damaged by impact and difficult to steer when impacted.

[0005] According to one aspect of the present invention, there is provided a collision test vehicle, comprising: The frame is a rectangular structure with four chamfers, and a cover plate is provided on the top of the frame. The cover plate and the frame cooperate to make the four sides and four corners of the rectangular structure present a slope structure. The frame is designed as a rectangular structure with chamfers to increase the stability of the car and reduce wind resistance. The cover plate on the top forms a streamlined appearance with the frame. The design of the slope structure helps to reduce the impact force during a collision.

[0006] A linear drive mechanism is arranged near one end of the frame, and the linear drive mechanism includes a linear drive wheel, and the linear drive wheel is connected to a first servo motor through a pulley transmission mechanism; the linear drive mechanism is located at one end of the frame and is used to provide power for linear advancement. It is connected to the first servo motor through a pulley transmission mechanism, so that the travel speed of the trolley can be controlled by adjusting the speed of the servo motor.

[0007] A steering drive mechanism is arranged near the other end of the frame, the steering drive mechanism includes a steering wheel, the steering wheel is rotatably arranged on a movable seat, the movable seat is hinged to a fixed seat, the fixed seat is fixedly connected to the frame, the steering wheel is also connected to the rotating wheel through a transmission rod, wherein the transmission rod is connected to the steering wheel and the rotating wheel through a ball bearing, and the rotating wheel is transmission-connected to the second servo motor; the steering drive mechanism is located at the other end of the frame, and the overall steering of the trolley is controlled by the second servo motor, the steering wheel is installed on the frame through a movable seat and a fixed seat, the movable seat allows the steering wheel to deviate, thereby adjusting the direction, and the ball bearing ensures flexibility during steering, so that the trolley can be turned during movement; And a battery compartment, the battery compartment is arranged in the middle of the frame, and the battery compartment is electrically connected to the first servo motor and the second servo motor.

[0008] The present invention is further configured such that vertical partitions are provided on the frame, the vertical partition supports are provided between the frame and the cover plate, and the vertical partition supports are provided in the middle of the slope structure of the cover plate and the frame; the vertical partitions are used to strengthen the structural strength between the frame and the cover plate, and at the same time support the space below the vertical partitions, which can be used to install other components or increase the stability of the internal space.

[0009] The present invention is further configured such that a rectangular space is formed in the middle of the frame by a vertical partition, and the battery compartment is arranged in the rectangular space; the vertical partition divides the middle part of the frame into a rectangular space for protecting the battery compartment, and this design is conducive to the installation and maintenance of the battery compartment.

[0010] The present invention is further configured such that the pulley transmission mechanism includes a first transmission wheel, a second transmission wheel and a transmission belt, the first transmission wheel is connected to one end of the linear drive wheel, and the first transmission wheel is connected to the second transmission wheel through a transmission belt, the second transmission wheel is connected to the output end of the linear reducer, and the input end of the linear reducer is connected to the first servo motor; the pulley transmission mechanism is used to transmit power, the first transmission wheel is connected to the linear drive wheel, connected to the second transmission wheel through a transmission belt, and the second transmission wheel is connected to the servo motor through the linear reducer. This transmission method can effectively convert the high speed and low torque of the motor into low speed and high torque to meet the needs of the vehicle's driving.

[0011] The present invention is further configured such that the first servo motor and the linear reducer are both fixedly connected to a fixing frame, and the fixing frame is fixedly connected to the skeleton; the fixing frame is used to fix the first servo motor and the linear reducer so that they are firmly mounted on the skeleton to ensure the stability and reliability of power transmission.

[0012] The linear driving wheel is rotationally connected to the wheel seat, the wheel seat is rotationally connected to the fixing frame, and the axis line of the rotation connection between the wheel seat and the fixing frame coincides with the rotation axis of the second transmission wheel; a first spring lifting mechanism is connected between the wheel seat and the fixing frame; the first spring lifting mechanism can be lifted up and down to reduce vibration when the linear driving wheel is impacted, and when the wheel seat moves up and down, since its rotation axis coincides with the rotation axis of the second transmission wheel, it can ensure vibration reduction while also enabling transmission.

[0013] The present invention is further configured such that the first spring lifting mechanism includes a spring and a damping telescopic rod, and the two ends of the spring and the damping telescopic rod are respectively connected to the wheel seat and the fixing frame; the first spring lifting mechanism is used to realize the self-adaptive lifting function of the trolley, and the height of the driving wheel is changed by the spring and the damping telescopic rod, thereby adjusting the overall height of the trolley. This design can effectively absorb the impact force during a collision and protect the trolley and the test vehicle.

[0014] The present invention is further configured such that a rotating seat is connected to the middle of the steering wheel, and the rotating seat is connected to the movable seat through a bearing; the steering wheel is installed on the movable seat through the rotating seat, and the rotating seat is connected to the movable seat through a bearing to ensure that the steering wheel can rotate freely to achieve steering action.

[0015] The present invention is further configured such that the movable seat is rotatably connected to the fixed seat, and a support portion is provided on one side of the movable seat, the support portion extends to the bottom of the fixed seat, a second spring lifting mechanism is connected between the fixed seat and the support portion, and the structure of the second spring lifting mechanism is the same as that of the first spring lifting mechanism; the movable seat is connected to the fixed seat through the second spring lifting mechanism, and the support portion extends to the bottom of the fixed seat. Such a design can ensure that the steering mechanism can adaptively adjust through the compression and extension of the spring when subjected to a collision to reduce the impact force.

[0016] The present invention is further configured such that support parts are provided at both ends of the movable seat, and the support parts at both ends are respectively connected to the fixed seat through a second spring lifting mechanism; support parts are provided at both ends of the movable seat and are connected to the fixed seat through the second spring lifting mechanism. Such a design can improve the stability and responsiveness of the steering mechanism, and the forces at both ends are more evenly applied, thereby ensuring the stability of the vehicle during the steering process.

[0017] The present invention is further configured such that the rotating wheel is connected to the second servo motor through a vertical transmission reducer; the rotating wheel is connected to the second servo motor through the vertical transmission reducer, and such a design can convert the horizontal rotation of the motor into the vertical rotation of the rotating wheel, thereby realizing the steering action. The vertical transmission reducer can further reduce the rotation speed and increase the torque to meet the steering requirements.

[0018] The present invention has the following technical effects: The skeleton of the present invention is designed as a rectangular structure with chamfers to increase the stability of the car and reduce wind resistance. The top cover and the skeleton together form a streamlined appearance, which can significantly reduce the impact force during a collision and prevent damage. The steering drive mechanism is located at the other end of the skeleton, and the overall steering of the car is controlled by a second servo motor. The steering wheel is installed on the skeleton through a movable seat and a fixed seat. The movable seat allows the steering wheel to be offset, thereby adjusting the direction. The ball head bearing ensures flexibility during steering, allowing the car to stably turn when it is impacted during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a stereogram of the present invention; Figure 2 is another stereogram of the present invention; Figure 3 It is a three-dimensional diagram of the internal structure of the present invention.

[0021] Reference numerals: 1. Frame; 11. Vertical partition; 2. Cover plate; 3. Battery compartment; 4. Linear drive mechanism; 41. Linear drive wheel; 42. Wheel seat; 43. Fixed frame; 44. First servo motor; 45. Transmission belt; 46. First spring lifting mechanism; 47. Linear reducer; 48. First transmission wheel; 49. Second transmission wheel; 5. Steering drive mechanism; 51. Steering wheel; 52. Fixed seat; 53. Rotating seat; 54. Second spring lifting mechanism; 55. Movable seat; 551. Support part; 56. Transmission rod; 57. Ball bearing; 58. Vertical transmission reducer; 59. Second servo motor; 510. Rotating wheel. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In this embodiment of the present invention, Figure 1-Figure 3As shown, a collision test trolley is provided, including a frame 1, which is welded from high-quality Q235 carbon steel plates. The frame 1 is a rectangular structure with four chamfers, and a cover plate 2 is arranged on the top of the frame 1. The cover plate 2 is made of high-quality stainless steel and is tightly fitted to the frame 1 through a bending process. The cover plate 2 and the frame 1 cooperate to make the four sides and four corners of the rectangular structure present a slope structure; the frame 1 is designed to be a rectangular structure with chamfers to increase the stability of the trolley and reduce wind resistance. The cover plate 2 on the top forms a streamlined appearance with the frame 1, and the design of the slope structure helps to reduce the impact force during a collision.

[0024] A vertical partition 11 is arranged on the frame 1, and the vertical partition 11 is supported and arranged between the frame 1 and the cover plate 2, and the vertical partition 11 is supported and arranged in the middle of the slope structure of the cover plate 2 and the frame 1; the vertical partition 11 is used to strengthen the structural strength between the frame 1 and the cover plate 2, and at the same time supports the space below the vertical partition 11, which can be used to install other components or increase the stability of the internal space.

[0025] A rectangular space is formed in the middle of the frame 1 by a vertical partition 11, and the battery compartment 3 is arranged in the rectangular space; the vertical partition 11 divides the middle part of the frame 1 into a rectangular space for protecting the battery compartment 3, and this design is conducive to the installation and maintenance of the battery compartment 3.

[0026] The present application also includes a linear drive mechanism 4 arranged near one end of the skeleton 1, the linear drive mechanism 4 includes a linear drive wheel 41, and the linear drive wheel 41 is connected to a first servo motor 44 through a pulley transmission mechanism; the linear drive mechanism 4 is located at one end of the skeleton 1, and is used to provide power for linear forward movement. It is connected to the first servo motor 44 through a pulley transmission mechanism, so that the travel speed of the car can be controlled by adjusting the speed of the servo motor.

[0027] The pulley transmission mechanism includes a first transmission wheel 48, a second transmission wheel 49 and a transmission belt 45. The first transmission wheel 48 is connected to one end of the linear drive wheel 41, and the first transmission wheel 48 is connected to the second transmission wheel 49 through the transmission belt 45. The second transmission wheel 49 is connected to the output end of the linear reducer 47, and the input end of the linear reducer 47 is connected to the first servo motor 44; the pulley transmission mechanism is used to transmit power, the first transmission wheel 48 is connected to the linear drive wheel 41, and is connected to the second transmission wheel 49 through the transmission belt 45, and the second transmission wheel 49 is connected to the servo motor through the linear reducer 47. This transmission method can effectively convert the high speed and low torque of the motor into low speed and high torque to meet the needs of the vehicle's driving.

[0028] The first servo motor 44 and the linear reducer 47 are both fixedly connected to the fixing frame 43, and the fixing frame 43 is fixedly connected to the frame 1; the fixing frame 43 is used to fix the first servo motor 44 and the linear reducer 47 so that they are firmly installed on the frame 1 to ensure the stability and reliability of power transmission.

[0029] The linear drive wheel 41 is rotationally connected to the wheel seat 42, and the wheel seat 42 is rotationally connected to the fixing frame 43, and the axis line of the rotation connection between the wheel seat 42 and the fixing frame 43 coincides with the rotation axis of the second transmission wheel 49; a first spring lifting mechanism 46 is connected between the wheel seat 42 and the fixing frame 43; the first spring lifting mechanism 46 can be lifted up and down to reduce vibration when the linear drive wheel 41 is impacted, and when the wheel seat 42 moves up and down, since its rotation axis coincides with the rotation axis of the second transmission wheel 49, it can ensure vibration reduction while also enabling transmission.

[0030] The first spring lifting mechanism 46 includes a spring and a damping telescopic rod, and the two ends of the spring and the damping telescopic rod are respectively connected to the wheel seat 42 and the fixing frame 43; the first spring lifting mechanism 46 is used to realize the self-adaptive lifting function of the trolley, and the height of the driving wheel is changed through the spring and the damping telescopic rod, thereby adjusting the overall height of the trolley. This design can effectively absorb the impact force during a collision and protect the trolley and the test vehicle.

[0031] The present application also includes a steering drive mechanism 5 arranged near the other end of the skeleton 1, the steering drive mechanism 5 includes a steering wheel 51, the steering wheel 51 is rotatably arranged on a movable seat 55, the movable seat 55 is hinged to a fixed seat 52, the fixed seat 52 is fixedly connected to the skeleton 1, the steering wheel 51 is also connected to the rotating wheel 510 through a transmission rod 56, wherein the transmission rod 56 is connected to the steering wheel 51 and the rotating wheel 510 through a ball bearing 57, and the rotating wheel 510 is transmission-connected to a second servo motor 59; the steering drive mechanism 5 is located at the other end of the skeleton 1, and the overall steering of the trolley is controlled by the second servo motor 59, the steering wheel 51 is installed on the skeleton 1 through the movable seat 55 and the fixed seat 52, the movable seat 55 allows the steering wheel 51 to be offset, thereby adjusting the direction, and the ball bearing 57 ensures flexibility during steering, allowing the trolley to steer during movement.

[0032] A rotating seat 53 is connected to the middle of the steering wheel 51, and the rotating seat 53 is connected to the movable seat 55 through a bearing; the steering wheel 51 is installed on the movable seat 55 through the rotating seat 53, and the rotating seat 53 is connected to the movable seat 55 through a bearing to ensure that the steering wheel 51 can rotate freely to achieve steering action.

[0033] The movable seat 55 is rotatably connected to the fixed seat 52, and a support portion 551 is provided on one side of the movable seat 55, and the support portion 551 extends to the bottom of the fixed seat 52. A second spring lifting mechanism 54 is connected between the fixed seat 52 and the support portion 551, and the second spring lifting mechanism 54 has the same structure as the first spring lifting mechanism 46; the movable seat 55 is connected to the fixed seat 52 through the second spring lifting mechanism 54, and the support portion 551 extends to the bottom of the fixed seat 52. Such a design can ensure that the steering mechanism can adaptively adjust through the compression and extension of the spring when subjected to a collision to reduce the impact force.

[0034] Support parts 551 are provided at both ends of the movable seat 55, and the support parts 551 at both ends are respectively connected to the fixed seat 52 through the second spring lifting mechanism 54; support parts 551 are provided at both ends of the movable seat 55 and are connected to the fixed seat 52 through the second spring lifting mechanism 54. Such a design can improve the stability and responsiveness of the steering mechanism, and the forces at both ends are more evenly applied, thereby ensuring the stability of the vehicle during the steering process.

[0035] The rotating wheel 510 is connected to the second servo motor 59 through the vertical transmission reducer 58; the rotating wheel 510 is connected to the second servo motor 59 through the vertical transmission reducer 58. This design can convert the horizontal rotation of the motor into the vertical rotation of the rotating wheel 510, thereby realizing the steering action. The vertical transmission reducer 58 can further reduce the rotation speed and increase the torque to meet the needs of steering.

[0036] The present application also includes a battery compartment 3, which is arranged in the middle of the frame 1, and the battery compartment 3 is electrically connected to the first servo motor 44 and the second servo motor 59; the battery compartment 3 is located in the middle position of the frame 1 to keep the weight of the trolley evenly distributed, and the battery compartment 3 is electrically connected to the two servo motors to be able to supply power to them.

[0037] Working principle: The linear drive mechanism 4 works: the first servo motor 44 is started, and after being decelerated by the linear reducer 47, it drives the first transmission wheel 48 to rotate. The first transmission wheel 48 drives the second transmission wheel 49 to rotate through the transmission belt 45. The rotation axis of the second transmission wheel 49 coincides with the axis of the wheel seat 42, thereby driving the linear drive wheel 41 to rotate. Through the pulley transmission mechanism, the power of the first servo motor 44 is transmitted to the linear drive wheel 41, so that the trolley moves forward or backward.

[0038] The steering drive mechanism 5 works: the second servo motor 59 is started, and after being decelerated by the vertical transmission reducer 58, it drives the rotating wheel 510 to rotate. The rotating wheel 510 drives the steering wheel 51 to rotate through the transmission rod 56. The transmission rod 56 and the steering wheel 51 and the rotating wheel 510 are all connected through ball bearings 57 to ensure smoothness of steering. The steering wheel 51 is hinged to the fixed seat 52 through the movable seat 55. When the steering wheel 51 rotates, the steering is completed through the hinged action of the movable seat 55.

[0039] The first spring lifting mechanism 46 and the second spring lifting mechanism 54 work: The support portion 551 extends to the bottom of the fixed seat 52 and is connected to the fixed seat 52 through a second spring lifting mechanism 54. When turning, the second spring lifting mechanism 54 can adjust the height of the steering wheel 51 to adapt to different road conditions; When the trolley is traveling, the linear driving wheel 41 is rotatably connected to the fixing frame 43 via the wheel seat 42 , and a first spring lifting mechanism 46 is connected between the wheel seat 42 and the fixing frame 43 .

[0040] The first spring lifting mechanism 46 includes a spring and a damping telescopic rod, and both ends of the spring and the damping telescopic rod are respectively connected to the wheel seat 42 and the fixing frame 43. When encountering an uneven road surface or a collision, the first spring lifting mechanism 46 can adjust the height of the linear drive wheel 41 to maintain the stability of the trolley.

[0041] When the trolley collides with the test vehicle, the first spring lifting mechanism 46 and the second spring lifting mechanism 54 can absorb part of the impact force and lower the chassis of the trolley to the ground by compressing the springs, thereby reducing the impact on the test vehicle. After the collision, the first spring lifting mechanism 46 and the second spring lifting mechanism 54 return to their original state, and the trolley automatically returns to its initial state.

[0042] The above are only preferred embodiments of the present application, and do not constitute any formal limitation on the present application. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present application without departing from the content of the technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A collision test vehicle, characterized in that: include: A frame (1), the frame (1) is a rectangular structure with four chamfered corners, and a cover plate (2) is provided on the top of the frame (1), the cover plate (2) and the frame (1) cooperate to make the four sides and four corners of the rectangular structure present a slope structure; A linear drive mechanism (4) is arranged near one end of the frame (1), the linear drive mechanism (4) comprising a linear drive wheel (41), the linear drive wheel (41) being connected to a first servo motor (44) via a pulley transmission mechanism; a steering drive mechanism (5) disposed near the other end of the frame (1), the steering drive mechanism (5) comprising a steering wheel (51), the steering wheel (51) being rotatably disposed on a movable seat (55), the movable seat (55) being hinged to a fixed seat (52), the fixed seat (52) being fixedly connected to the frame (1), the steering wheel (51) being further connected to a rotating wheel (510) via a transmission rod (56), wherein the transmission rod (56) is connected to the steering wheel (51) and the rotating wheel (510) via a ball bearing (57), and the rotating wheel (510) is transmission-connected to a second servo motor (59); and A battery compartment (3), wherein the battery compartment (3) is arranged in the middle of the frame (1), and the battery compartment (3) is electrically connected to the first servo motor (44) and the second servo motor (59).

2. A crash test vehicle according to claim 1, characterized in that: The frame (1) is provided with a vertical partition (11), the vertical partition (11) is supported and arranged between the frame (1) and the cover plate (2), and the vertical partition (11) is supported and arranged in the middle of the slope structure of the cover plate (2) and the frame (1).

3. A crash test vehicle according to claim 1, characterized in that: A rectangular space is formed in the middle of the frame (1) through a vertical partition (11), and the battery compartment (3) is arranged in the rectangular space.

4. A crash test vehicle according to claim 1, characterized in that: The pulley transmission mechanism comprises a first transmission wheel (48), a second transmission wheel (49) and a transmission belt (45); the first transmission wheel (48) is connected to one end of the linear drive wheel (41), and the first transmission wheel (48) is connected to the second transmission wheel (49) via the transmission belt (45); the second transmission wheel (49) is connected to the output end of a linear reducer (47), and the input end of the linear reducer (47) is connected to a first servo motor (44).

5. A crash test vehicle according to claim 4, characterized in that: The first servo motor (44) and the linear reducer (47) are both fixedly connected to the fixing frame (43), and the fixing frame (43) is fixedly connected to the frame (1); The linear drive wheel (41) is rotatably connected to the wheel seat (42), the wheel seat (42) is rotatably connected to the fixing frame (43), and the axis of the rotatable connection between the wheel seat (42) and the fixing frame (43) coincides with the rotation axis of the second transmission wheel (49); A first spring lifting mechanism (46) is connected between the wheel seat (42) and the fixing frame (43).

6. A crash test vehicle according to claim 5, characterized in that: The first spring lifting mechanism (46) comprises a spring and a damping telescopic rod, and two ends of the spring and the damping telescopic rod are respectively connected to the wheel seat (42) and the fixing frame (43).

7. The crash test vehicle according to claim 1, characterized in that: A rotating seat (53) is connected to the middle of the steering wheel (51), and the rotating seat (53) is connected to the movable seat (55) via a bearing.

8. The crash test vehicle according to claim 1, characterized in that: The movable seat (55) is rotatably connected to the fixed seat (52), and a support portion (551) is provided on one side of the movable seat (55), the support portion (551) extends to the bottom of the fixed seat (52), and a second spring lifting mechanism (54) is connected between the fixed seat (52) and the support portion (551).

9. The collision test vehicle according to claim 1, characterized in that: Support parts (551) are provided at both ends of the movable seat (55), and the support parts (551) at both ends are respectively connected to the fixed seat (52) via second spring lifting mechanisms (54).

10. The collision test vehicle according to claim 1, characterized in that: The rotating wheel (510) is transmission-connected to the second servo motor (59) via a vertical transmission reducer (58).

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