Split type active defense automobile rear bumper, automobile and active defense method

Abstract

The invention belongs to the technical field of automobile bumpers, and discloses a split type active defense automobile rear bumper, an automobile and an active defense method.The bumper comprises an anti-collision beam assembly, a sliding rail assembly and a driving assembly, the anti-collision beam assembly is arranged on the sliding rail assembly in a sliding mode, and the sliding rail assembly is fixedly connected to the rear end of an automobile body; the driving assembly is installed on the sliding rail assembly and used for driving the anti-collision beam assembly to do telescopic motion along the sliding rail assembly. The driving assembly is connected with the vehicle controller and used for receiving a driving signal of the vehicle controller. The invention provides a novel split type active defense automobile rear bumper structure which aims to optimize a force transmission path, an energy absorption structure and a mounting arrangement mode during rear collision and considers the modeling style, the safety of passengers in the rear collision and the economical efficiency of automobile maintenance at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile bumpers, and in particular relates to a split-type active defense automobile rear bumper, an automobile and an active defense method. Background Art

[0002] The rear bumper, as an indispensable and important part of the car structure, is designed with the core function of effectively absorbing and mitigating the impact from the outside world. This feature plays a vital protective role in the driving process of the vehicle, especially when the front and rear parts of the vehicle body encounter a collision. The rear bumper can act as a solid barrier to effectively prevent or at least reduce the potential damage caused by the collision to the vehicle itself and the passengers in the vehicle. This is particularly critical in low-speed collision accidents. It acts as a buffer to absorb the collision energy to the maximum extent, thereby protecting the integrity and safety of the rear part of the vehicle.

[0003] In the past, the rear bumper design of car models often adopted a shape that protruded from the rear of the car. This design not only formed an obvious protective posture visually, but also played a better protective effect in actual collisions. At the same time, this design also took into account the economic efficiency of maintenance, because the protruding bumper is more likely to become the primary force point in a minor collision, thus protecting other more expensive and complex parts of the car body from damage and reducing maintenance costs.

[0004] However, in recent years, with the continuous development of automobile design concepts, the styling design trend is increasingly inclined to pursue a more dynamic and streamlined appearance. This design preference has led to the continuous shortening of the rear of the car, and the rear bumper has also been retracted forward, with a higher degree of integration with the body. Although this change has improved the visual effect of the vehicle aesthetically, it has affected the structural crashworthiness of the car to a certain extent. Because when a collision occurs, the first thing the following car may come into contact with is no longer the solid rear bumper, but the relatively fragile rear cover or rear taillight area, which undoubtedly increases the risk of vehicle damage and the difficulty of repair.

[0005] On the other hand, for the sake of lightweight, modern cars also tend to reduce the length of the rear structure of the car body in design. Although this design helps to reduce the overall weight of the vehicle and improve fuel economy, it makes the front and rear space of the body anti-collision beam and energy absorption box relatively insufficient. The space limitation affects the energy absorption efficiency of the energy absorption structure, so that when a collision occurs, the vehicle may not be able to fully absorb and disperse the collision energy, which further affects the structural crashworthiness and maintenance economy of the car. Therefore, how to ensure the safety and maintenance economy of its rear structure while maintaining the beauty and lightweight of the car has become an important issue that car designers need to constantly explore and balance. Summary of the invention

[0006] The purpose of the present invention is to provide a split active defense automobile rear bumper, an automobile and an active defense method to solve the problems of high maintenance cost and small energy absorption space caused by the bumper of the prior art not being the first collision force point.

[0007] To achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a split-type active defense automobile rear bumper, including an anti-collision beam assembly, a slide rail assembly and a drive assembly, wherein the anti-collision beam assembly is slidably arranged on the slide rail assembly, and the slide rail assembly is fixedly connected to the rear end of the vehicle body; the drive assembly is installed on the slide rail assembly, and is used to drive the anti-collision beam assembly to perform telescopic movement along the slide rail assembly; the drive assembly is connected to a vehicle controller, and is used to receive a drive signal from the vehicle controller.

[0008] Furthermore, the slide rail assembly includes a lower slide rail and an upper slide rail, the two lower slide rails are symmetrically fixed at the rear of the vehicle, and the upper slide rail is arranged across the two lower slide rails, and the upper slide rail can slide along the lower slide rails.

[0009] Furthermore, the anti-collision beam assembly includes an anti-collision beam body, a left anti-collision beam energy absorption box, a right anti-collision beam energy absorption box and an energy absorption box connecting plate; the anti-collision beam body is fixedly connected to the left anti-collision beam energy absorption box and the right anti-collision beam energy absorption box, and the left anti-collision beam energy absorption box and the right anti-collision beam energy absorption box are connected to the slide rail assembly through the energy absorption box connecting plate.

[0010] Furthermore, the left anti-collision beam energy absorption box and the right anti-collision beam energy absorption box are fixedly connected to the upper slide rail through energy absorption box connecting plates.

[0011] Furthermore, the driving assembly includes a worm wheel, a worm, a lead screw, a gear box, and a motor; the motor and the gear box are fixed to the upper slide rail, the motor is connected to the gear box, the output end of the gear box is connected to the worm, the worm wheel is connected to the worm, the lead screw is fixed to the lower slide rail, and the worm wheel is meshed with the lead screw.

[0012] Furthermore, the vehicle controller is connected to a rear radar of the vehicle for detecting the rear vehicle and sending a collision warning signal to the drive assembly.

[0013] Furthermore, the anti-collision beam assembly is fixedly connected to the sliding end of the rear bumper body.

[0014] Furthermore, a rear bumper body fixed end is arranged outside the sliding end of the rear bumper body, and the rear bumper body fixed end is fixedly connected to the rear of the vehicle; when the anti-collision beam assembly is retracted, the rear bumper body sliding end and the rear bumper body fixed end are in the same plane.

[0015] In a second aspect, the present invention provides a car, comprising the split-type active defense car rear bumper.

[0016] In a third aspect, the present invention provides an active defense method for a split-type active defense rear bumper of a vehicle, comprising the following steps: When the vehicle is parked or in normal driving, the sliding end of the rear bumper body is in a closed state; During the driving process of the vehicle, the radar at the rear of the vehicle body monitors the target behind the vehicle in real time. When the radar detects that a target is approaching the vehicle body quickly and there is a risk of rear-end collision, the radar will issue a warning signal and output a signal to the vehicle controller. The vehicle controller outputs a signal to the drive component to drive the anti-collision beam assembly to slide to the rear of the vehicle to achieve the open state. In the event of a dangerous contact without a collision, the vehicle controller outputs a signal to the drive component to drive the anti-collision beam assembly to retract and return to the closed state.

[0017] Compared with the prior art, the present invention has the following technical effects: The present invention proposes a novel split active defense automobile rear bumper structure, which aims to optimize the force transmission path, energy absorption structure and installation layout during rear collision, while taking into account the styling style, the safety of the occupants in rear collision and the economy of vehicle maintenance.

[0018] Through the split structure design, a primary anti-collision beam is introduced into the rear bumper structure. This design enables the rear bumper sliding end and the anti-collision beam to serve as the first line of defense when a collision occurs, effectively absorbing and dispersing the collision energy.

[0019] The anti-collision beam assembly includes the anti-collision beam body and the left and right anti-collision beam energy absorption boxes. The energy absorption boxes are provided with crush ribs, which further enhance the energy absorption effect and help reduce the damage to the rear of the vehicle caused by the collision.

[0020] The system uses a radar device at the rear of the vehicle to monitor targets behind the vehicle in real time. When it detects that a target is approaching rapidly from behind and there is a risk of rear-end collision, the system will issue a warning signal and drive the sliding end of the rear bumper and the anti-collision beam to slide toward the rear of the vehicle to expand the protective energy absorption space.

[0021] This active defense mechanism can avoid direct contact damage to fragile parts such as the rear cover and taillights during a collision, thereby improving the overall safety of the vehicle.

[0022] The rear bumper is divided into two parts: a fixed end and a sliding end. The sliding end is connected to the drive assembly through a slide rail assembly, allowing it to be extended and retracted when needed.

[0023] When no collision occurs and the alarm is lifted, the vehicle control end will output a signal to the drive component to drive the sliding end of the rear bumper and the anti-collision beam to retract to their original state, maintaining the vehicle's neat appearance and functionality.

[0024] The split structural design makes it easier to disassemble and replace components such as the sliding end and anti-collision beam of the rear bumper after a collision, reducing the difficulty and cost of maintenance.

[0025] The design of the energy absorption box also takes into account easy replaceability. It can be quickly replaced through simple methods such as screw connection, thereby improving maintenance efficiency.

[0026] This technical solution can adapt to different vehicle models and body structures, and can achieve compatibility with existing vehicle models by adjusting the installation position and parameters of the slide rail assembly and drive components.

[0027] At the same time, the design also takes into account the need for lightweighting. By optimizing the structure and material selection, it is possible to reduce weight and improve fuel economy while maintaining protection capabilities.

[0028] In summary, this technical solution achieves effective protection for the rear of the vehicle through the design of a split active defense rear bumper structure, improves collision safety, reduces maintenance costs, and takes into account the vehicle's styling style and lightweight requirements. This innovative design is expected to be widely used and promoted in the field of automotive safety in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic front view of part of the structure of the outer surface of the split active defense automobile rear bumper in a closed state according to an embodiment of the present application.

[0030] Figure 2 It is a partial structural schematic diagram of the split active defense automobile rear bumper according to an embodiment of the present application.

[0031] Figure 3 This is a top view of a partial structure of the split active defense rear bumper of the present application embodiment in a closed state. Figure 4 It is a schematic top view of the partial structure of the split active defense automobile rear bumper in the embodiment of the present application in the open state.

[0032] Figure numerals: rear bumper body fixed end 10, rear bumper body sliding end 20, anti-collision beam assembly 30, anti-collision beam body 301, left anti-collision beam energy absorption box 302, right anti-collision beam energy absorption box 303, energy absorption box connecting plate 304, slide rail assembly 40, lower slide rail 401, upper slide rail 402, drive assembly 50, worm gear 501, worm 502, screw 503, gear box 504, motor 505. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1, the present invention provides a split-type active defense automobile rear bumper, including an anti-collision beam assembly 30, a slide rail assembly 40 and a drive assembly 50, the anti-collision beam assembly 30 is slidably arranged on the slide rail assembly 40, and the slide rail assembly 40 is fixedly connected to the rear end of the vehicle body; the drive assembly 50 is installed on the slide rail assembly 40, and is used to drive the anti-collision beam assembly 30 to perform telescopic movement along the slide rail assembly 40; the drive assembly 50 is connected to the vehicle controller, and is used to receive the drive signal of the vehicle controller.

[0037] The present invention proposes a novel split active defense automobile rear bumper structure, which aims to optimize the force transmission path, energy absorption structure and installation layout during rear collision, while taking into account the styling style, the safety of the occupants in rear collision and the economy of vehicle maintenance.

[0038] Embodiment 2, the present invention provides a split type active defense automobile rear bumper, comprising: The rear bumper body fixed end 10, the rear bumper body sliding end 20, the anti-collision beam assembly 30, the slide rail assembly 40 and the driving assembly 50. The slide rail assembly 40 may include: a lower slide rail 401 and an upper slide rail 402. The bumper body sliding end 20 and the anti-collision beam assembly 30 are connected to the upper slide rail 402. The driving assembly is connected to the upper slide rail 402 and is used to drive the upper slide rail to drive the rear bumper sliding end 20 and the anti-collision beam assembly 30 to slide along the lower slide rail 401.

[0039] The bumper body sliding end 20 is connected to the anti-collision beam assembly 30 by screws. The left anti-collision beam energy absorption box 302 and the right anti-collision beam energy absorption box 303 are provided with collapse ribs to absorb collision energy. The left anti-collision beam energy absorption box 302, the right anti-collision beam energy absorption box 303 and the energy absorption box connecting plate 304 are connected by screws, which is convenient for disassembly and replacement after a collision.

[0040] The anti-collision beam assembly 30 includes: an anti-collision beam body 301, a left anti-collision beam energy absorption box 302, a right anti-collision beam energy absorption box 303, and an energy absorption box connecting plate 304. The anti-collision beam body 301 is connected to the left anti-collision beam energy absorption box 302 and the right anti-collision beam energy absorption box 303 by CO2 welding, and the anti-collision beam body 301 is connected to the rear bumper body sliding end 20 by screws. The left / right anti-collision beam energy absorption box is connected to the upper slide rail 402 by screws through the energy absorption box connecting plate 304.

[0041] The bumper body sliding end 20 and the anti-collision beam assembly 30 are slidably disposed on the slide rail assembly 40 .

[0042] The anti-collision beam assembly 30 is connected to the upper slide rail 402. The slide rail assembly 40 is connected to the rear end of the vehicle body by screws.

[0043] The driving assembly 50 includes: a worm wheel 501, a worm 502, a lead screw 503, a gear box 504, and a motor 505. The gear box 504 is fixed to the upper slide rail 402, and the lead screw 503 is fixed to the lower slide rail 401. The motor 505 is connected to the gear box 504 and is used to drive the gear box to rotate and output power.

[0044] The motor 505 of the driving assembly 50 drives the gear box 504, and the power is transmitted to the worm 502 through the output shaft, and the worm 502 transmits the power to the worm wheel 501. The turbine 501 with internal threads starts to rotate, so that the turbine 501 can achieve linear motion on the lead screw 503. Since the lead screw 503 is fixed to the lower slide rail 401 and the gear box 504 is fixed to the upper slide rail 402, this structure enables the upper slide rail 402 to achieve linear motion on the lower slide rail 401. And self-locking is achieved by relying on the characteristics of the worm gear.

[0045] The split active defense automobile rear bumper provided by the present invention realizes structural integration and modularization by integrating multiple components such as the rear bumper body fixed end 10, the rear bumper body sliding end 20, the anti-collision beam assembly 30, the slide rail assembly 40 and the drive component 50.

[0046] This design makes the rear bumper system more compact and orderly, and is easy to install, maintain and replace, thus improving production efficiency and maintenance convenience.

[0047] The anti-collision beam assembly 30 includes an anti-collision beam body 301, a left anti-collision beam energy absorption box 302, a right anti-collision beam energy absorption box 303 and an energy absorption box connecting plate 304. These components are tightly connected together by CO2 welding and screw connection to form a solid anti-collision structure.

[0048] The left anti-collision beam energy absorption box 302 and the right anti-collision beam energy absorption box 303 are provided with crush ribs, which can effectively absorb and disperse energy during a collision and reduce the impact on the rear of the vehicle.

[0049] The rear bumper body sliding end 20 and the anti-collision beam assembly 30 are slidably arranged on the slide rail assembly 40 , and can realize linear motion along the lower slide rail 401 through the drive of the drive assembly 50 .

[0050] The driving assembly 50 is composed of a worm wheel 501, a worm 502, a lead screw 503, a gear box 504, a motor 505 and other components, and has a compact structure and high transmission efficiency.

[0051] The characteristics of the worm gear enable the upper slide rail 402 to achieve self-locking on the lower slide rail 401, ensuring that the rear bumper sliding end 20 and the anti-collision beam assembly 30 can maintain a stable state when no external force is required, thereby improving the safety of the vehicle.

[0052] The bumper body sliding end 20 is connected to the anti-collision beam assembly 30 by screws, and the left anti-collision beam energy absorption box 302, the right anti-collision beam energy absorption box 303 and the energy absorption box connecting plate 304 are also connected by screws. This connection method makes it easy to disassemble and replace the components.

[0053] After a collision, damaged parts can be quickly replaced, reducing repair costs and time.

[0054] The motor 505 of the driving assembly 50 drives the gear box 504 to rotate and output power, which is transmitted to the worm 502 through the output shaft, and then transmitted to the worm wheel 501 by the worm 502, so as to realize the linear motion of the turbine 501 on the lead screw 503.

[0055] This power transmission method is simple in structure and reliable, and can ensure that the rear bumper sliding end 20 and the anti-collision beam assembly 30 can be accurately and quickly extended or retracted when needed.

[0056] In summary, Example 2 provides a split-type active defense rear bumper for automobiles, achieving multiple technical effects such as structural integration and modularization, enhanced anti-collision performance, sliding mechanism and self-locking function, easy disassembly and replacement, and power transmission and motion control. These technical effects jointly improve the safety, maintenance convenience and production efficiency of the vehicle, and have broad application prospects and market value.

[0057] Working principle: Power transmission: When the vehicle needs to adjust the position of the rear bumper, the motor starts and drives the gearbox to rotate. The output shaft of the gearbox transmits power to the worm, and the worm transmits power to the worm wheel. Since the worm wheel has an internal thread, it forms a threaded match with the lead screw fixed on the lower slide rail, so the worm wheel starts to rotate and moves linearly along the lead screw.

[0058] Sliding mechanism: Since the worm wheel is fixed on the upper slide rail, as the worm wheel moves linearly on the lead screw, the upper slide rail also drives the sliding end of the rear bumper body and the anti-collision beam assembly connected thereto to move linearly along the lower slide rail. In this way, the rear bumper can be extended or retracted as needed.

[0059] Self-locking function: The worm gear transmission has a self-locking characteristic, that is, when the lead angle of the worm is less than the equivalent friction angle between the worm gear tooth surfaces, the worm gear mechanism has a reverse self-locking function. This means that in the absence of external power input, the rear bumper system can maintain its current position and will not move accidentally due to external shock or vibration.

[0060] Anti-collision mechanism: When a vehicle collides, the anti-collision beam body first bears the impact force, and the impact force is dispersed and absorbed by the left and right anti-collision beam energy absorption boxes. The crush rib design inside the energy absorption box enables the energy absorption box to deform in a controlled manner when impacted, thereby absorbing more collision energy and reducing the impact and damage to the rear of the vehicle.

[0061] The split active defense rear bumper realizes the active defense and position adjustment functions of the rear bumper through ingenious structural design and power transmission mechanism.

[0062] Under normal driving conditions, the rear bumper can be extended or retracted through the drive assembly to adapt to different driving needs and road conditions.

[0063] When a collision occurs, the anti-collision beam assembly and energy absorption box can effectively absorb and disperse the impact force to protect the safety of the vehicle and passengers. At the same time, the self-locking function of the system also ensures that the rear bumper can remain stable when no adjustment is required.

[0064] Embodiment 3, an active defense method for a split-type active defense rear bumper of a car, comprising: When the vehicle is parked or in normal driving, the rear bumper body sliding end 20 is in a closed state. Figure 3 As shown. During the driving process of the vehicle, the radar at the rear of the vehicle body monitors the target behind the vehicle in real time. When the vehicle warning system detects that a target is approaching the vehicle body quickly and there is a risk of rear-end collision, the system will issue a warning signal and output a signal to the driving component 50 of the active defense rear bumper of the vehicle to drive the rear bumper sliding end 20 and the anti-collision beam assembly 30 to slide toward the rear of the vehicle to achieve the open state. Figure 4 At this time, the anti-collision structure at the rear of the vehicle body is expanded from one layer of the anti-collision beam at the vehicle body end to two layers of the anti-collision beam at the vehicle body end + the anti-collision beam at the rear bumper sliding end, which increases the protective energy absorption space and avoids direct contact damage to the rear cover and rear taillights during a collision. If there is no collision and in the case of dangerous contact, the vehicle control end outputs a signal to the drive component 50 to drive the rear bumper sliding end 20 and the anti-collision beam assembly 30 to retract and return to the closed state.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Split active defense car rear bumper, characterized in that: The vehicle comprises an anti-collision beam assembly (30), a slide rail assembly (40) and a drive assembly (50); the anti-collision beam assembly (30) is slidably arranged on the slide rail assembly (40), and the slide rail assembly (40) is fixedly connected to the rear end of the vehicle body; the drive assembly (50) is mounted on the slide rail assembly (40) and is used to drive the anti-collision beam assembly (30) to perform telescopic movement along the slide rail assembly (40); and the drive assembly (50) is connected to a vehicle controller and is used to receive a drive signal from the vehicle controller.

2. The split-type active defense automobile rear bumper according to claim 1 is characterized in that: The slide rail assembly (40) comprises a lower slide rail (401) and an upper slide rail (402), wherein the two lower slide rails (401) are symmetrically fixed to the rear of the vehicle, and the upper slide rail (402) is arranged across the two lower slide rails (401), and the upper slide rail (402) can slide along the lower slide rails (401).

3. The split type active defense automobile rear bumper according to claim 2 is characterized in that: The anti-collision beam assembly (30) comprises an anti-collision beam body (301), a left anti-collision beam energy absorption box (302), a right anti-collision beam energy absorption box (303) and an energy absorption box connecting plate (304); the anti-collision beam body (301) is fixedly connected to the left anti-collision beam energy absorption box (302) and the right anti-collision beam energy absorption box (303); the left anti-collision beam energy absorption box (302) and the right anti-collision beam energy absorption box (303) are connected to the slide rail assembly (40) via the energy absorption box connecting plate (304).

4. The split-type active defense automobile rear bumper according to claim 3 is characterized in that: The left anti-collision beam energy absorption box (302) and the right anti-collision beam energy absorption box (303) are fixedly connected to the upper slide rail (402) via an energy absorption box connection plate (304).

5. The split-type active defense automobile rear bumper according to claim 1 is characterized in that: The driving assembly (50) comprises a worm wheel (501), a worm (502), a lead screw (503), a gear box (504), and a motor (505); the motor (505) and the gear box (504) are fixed to the upper slide rail (402), the motor (505) is connected to the gear box (504), the output end of the gear box (504) is connected to the worm (502), the worm wheel (501) is connected to the worm (502), the lead screw (503) is fixed to the lower slide rail (401), and the worm wheel (501) is meshed with the lead screw (503).

6. The split-type active defense automobile rear bumper according to claim 1, characterized in that: The vehicle controller is connected to a rear radar of the vehicle and is used to detect the rear vehicle and send a collision warning signal to the drive component (50).

7. The split-type active defense automobile rear bumper according to claim 1, characterized in that: The anti-collision beam assembly (30) is fixedly connected to the rear bumper body sliding end (20).

8. The split-type active defense automobile rear bumper according to claim 7 is characterized in that: A rear bumper body fixed end (10) is arranged outside the rear bumper body sliding end (20), and the rear bumper body fixed end (10) is fixedly connected to the rear of the vehicle; when the anti-collision beam assembly (30) is retracted, the rear bumper body sliding end (20) and the rear bumper body fixed end (10) are in the same plane.

9. A car, characterized in that: It comprises a split-type active defense automobile rear bumper as described in any one of claims 1 to 8.

10. The active defense method of the split-type active defense rear bumper of a car is characterized in that: The split active defense automobile rear bumper according to any one of claims 1 to 8 comprises the following steps: When the vehicle is parked or in normal driving, the rear bumper body sliding end (20) is in a closed state; During the driving process of the vehicle, the radar device at the rear of the vehicle body is used to monitor the target behind the vehicle in real time. When the radar device detects that a target behind the vehicle is rapidly approaching the vehicle body and there is a risk of rear-end collision, the radar device will issue a warning signal and output a signal to the vehicle controller. The vehicle controller outputs a signal to the drive component (50) to drive the anti-collision beam assembly (30) to slide toward the rear of the vehicle to achieve an open state. In the case of dangerous contact without collision, the vehicle controller outputs a signal to the drive component (50) to drive the anti-collision beam assembly (30) to retract and return to the closed state.

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