A pedestrian protection device for the front of a freight vehicle

Abstract

This utility model provides a front-end pedestrian protection device for a truck, relating to the field of front-end pedestrian protection technology. The front-end pedestrian protection device for a truck is installed on the front bumper beam of the vehicle, including a protective plate assembly, a telescopic component, and a buffer mechanism. The telescopic component drives the protective plate assembly to switch postures: in the non-operating state, the protective plate assembly is horizontally retracted under the bumper beam, effectively preserving the vehicle's original ground clearance and ensuring unimpeded driving passability; in the operating state, the protective plate assembly flips to a vertical posture and protrudes in front of the bumper beam. When a collision occurs, the vertically arranged protective plate effectively blocks and pushes aside pedestrians, non-motorized vehicles, and other collision objects, preventing them from being pulled under the vehicle chassis, thereby minimizing the risk of personal injury and property damage and improving vehicle driving safety.

Description

Technical Field

[0001] This application relates to the field of pedestrian protection technology at the front of a vehicle, and more specifically, to a pedestrian protection device at the front of a freight vehicle. Background Technology

[0002] Existing front underrun protection devices must consider vehicle passability, especially for construction vehicles where the approach angle needs to reach the maximum permitted by regulations to meet passability requirements. Therefore, when driving on urban roads, the excessive ground clearance of the front underrun protection affects pedestrian safety. The design of the front underrun protection is intended to minimize the risk of the impacting vehicle going under the vehicle in the event of an accident at high speeds. However, when vehicles are traveling at low speeds on urban roads, and a traffic accident causes pedestrians, bicycles, or electric vehicles to fall, the pedestrian's fall height is generally no more than 250mm. In this situation, the vehicle's front underrun protection, with a ground clearance of nearly 400mm, is insufficient to push these objects away, resulting in pedestrians being pulled under the vehicle and suffering secondary injuries. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a pedestrian protection device for the front end of a truck, comprising a crash beam installed at the front of the vehicle, including a protective plate assembly, a telescopic buffer mechanism, and a displacement structure. The protective plate assembly includes a support plate rotatably connected to the underside of the crash beam, and a protective plate located on the side of the support plate away from the vehicle. The fixed end of the telescopic member is hinged to the front end of the vehicle, and the piston end of the telescopic member is hinged to the support plate. The telescopic movement of the telescopic member allows the protective plate assembly to be flipped to the bottom and front of the crash beam. One end of the buffer mechanism is fixed to the support plate, and the other end passes through the support plate and connects to the protective plate. The buffer mechanism provides the protective plate with elastic buffering capability relative to the support plate.

[0004] Preferably, the range of the rotation angle of the support plate is 270°-360°.

[0005] Preferably, the two ends of the protective plate extend toward the vehicle, and the corners are arc-shaped.

[0006] Preferably, the buffer mechanism includes a fixed part fixed to the support plate and a piston part that slides through the support plate and is dampedly inserted into the fixed end, wherein a fixing ring is coaxially fixed to one end of the piston part away from the fixed part.

[0007] An embodiment of this application provides a pedestrian protection device for the front end of a truck, which further includes a displacement structure. The displacement structure comprises a lateral displacement mechanism and a vertical displacement mechanism. The lateral displacement mechanism includes two lateral locking strips, two sets of lateral buffer components, and two lateral sliding blocks. The two lateral locking strips are arranged side-by-side, and the two sets of lateral buffer components are correspondingly disposed within the two lateral locking strips. The two lateral sliding blocks are symmetrically locked to the piston portion and fixedly connected to the fixing ring. The two lateral sliding blocks slide within the two lateral locking strips and are slidably sleeved on each corresponding set of components. A horizontal buffer assembly; the vertical displacement mechanism includes two vertical locking strips, two sets of vertical buffer assemblies, and two vertical slides. The two vertical locking strips are fixed side-by-side to the side of the protective plate facing the support plate. The two sets of vertical buffer assemblies are correspondingly arranged within the two vertical locking strips. The two vertical slides are respectively fixed to the corresponding horizontal locking strips. The two vertical slides slide on the two vertical locking strips and slide in cooperation with the two sets of vertical buffer assemblies. The two vertical locking strips and the two horizontal locking strips are arranged in the same plane at right angles.

[0008] Preferably, a transverse groove is provided on one side of the transverse snap-fit ​​strip; the transverse buffer assembly includes a transverse guide rod fixedly connected to the transverse groove along the length direction, two transverse buffer elastic members are symmetrically sleeved on the transverse guide rod, and end plates are fixedly connected to the two transverse buffer elastic members at their close ends, and the two end plates are slidably sleeved on the transverse guide rod and abut against both sides of the transverse slide block.

[0009] Preferably, the transverse slide includes a transverse slider that is slidably sleeved on the transverse guide rod, the transverse slider is slidably disposed in the transverse groove, and a fixing sleeve is fixedly connected to the side of the transverse slider facing the piston portion, the fixing sleeve being snapped into the piston portion and fixedly connected to the fixing ring.

[0010] Preferably, a vertical groove is provided on one side of the vertical snap-fit ​​strip; the vertical buffer assembly includes a vertical guide rod fixedly connected to the vertical groove along its length direction, and a vertical buffer elastic element is sleeved on one of the downward-facing ends of the vertical guide rod when it is vertical. One end of the vertical buffer elastic element abuts against the side wall of the vertical groove, and an end plate two is fixedly connected to the other end of the vertical buffer elastic element. The end plate two is slidably sleeved on the vertical guide rod.

[0011] Preferably, the vertical slide includes a connecting plate fixed to the horizontal snap-fit ​​strip, a vertical slider is fixed to one end of the connecting plate, the two sides of the vertical slider slide in the vertical groove respectively, and the vertical slider is slidably sleeved on the two vertical guide rods.

[0012] Preferably, when the two vertical sliders are in a vertical direction, the bottom end of the downward-facing vertical slider is fixed to the second end plate.

[0013] The beneficial effects of a pedestrian protection device for the front end of a freight vehicle according to an embodiment of this application are: 1. The protective plate assembly achieves attitude switching through the telescopic drive of the telescopic component: In the non-operating state, the protective plate assembly is horizontally retracted under the crash beam, effectively preserving the vehicle's original ground clearance and ensuring that driving passability is not affected; in the operating state, the telescopic component drives the protective plate assembly to flip to a vertical position and protrude in front of the crash beam, actively reducing the vehicle's ground clearance through the vertical height of the protective plate itself. When a vehicle collision occurs, the vertically arranged protective plate can effectively block and laterally push away pedestrians, non-motorized vehicles, and other collision objects, preventing collision objects from being pulled under the vehicle chassis from the source, thereby minimizing the risk of personal injury and property damage and improving vehicle driving safety; 2. By integrating a buffer mechanism, the protective plate is given the ability to buffer displacement relative to the support plate: when the protective plate comes into contact with a pedestrian or object and performs a pushing action, this buffer displacement can effectively absorb the collision energy, avoid the direct effect of rigid impact, thereby significantly reducing the degree of pedestrian injury and the probability of object damage, and further improving the safety protection effectiveness of the protective system. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a diagram showing the vertical working state of a pedestrian protection device at the front of a truck according to an embodiment of this application; Figure 2 This is a diagram showing the horizontally retracted state of a pedestrian protection device at the front of a truck according to an embodiment of this application; Figure 3 This is a partial structural schematic diagram of a pedestrian protection device at the front of a freight vehicle according to an embodiment of this application; Figure 4 This is a partial exploded view of a pedestrian protection device at the front of a truck according to an embodiment of this application; Figure 5 This is an exploded view of the buffer mechanism and lateral displacement mechanism according to embodiments of this application; Figure 6This is an exploded view of the structure of the transverse snap-fit ​​strip and the vertical displacement mechanism according to an embodiment of this application; Figure 7 This is a simplified schematic diagram illustrating the working principle of a pedestrian protection device at the front of a freight vehicle according to an embodiment of this application.

[0016] Icons: 1. Anti-collision beam; 2. Protective plate assembly; 21. Support plate; 22. Protective plate; 3. Telescopic component; 4. Buffer mechanism; 41. Fixing part; 42. Piston part; 421. Fixing ring; 5. Lateral displacement mechanism; 51. Lateral locking strip; 511. Lateral slide groove; 52. Lateral buffer assembly; 521. Lateral guide rod; 522. Lateral buffer elastic element; 523. End plate one; 53. Lateral slide block; 531. Lateral slider; 532. Fixing sleeve; 6. Vertical displacement mechanism; 61. Vertical locking strip; 611. Vertical slide groove; 62. Vertical buffer assembly; 621. Vertical guide rod; 622. Vertical buffer elastic element; 623. End plate two; 63. Vertical slide block; 631. Connecting plate; 632. Vertical slider. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] The following describes in detail, through specific embodiments, a pedestrian protection device for the front of a truck, comprising a crash beam 1 installed at the front of the vehicle.

[0019] Example 1

[0020] like Figures 1-3 As shown, a pedestrian protection device for the front of a cargo vehicle according to this utility model includes a protective plate assembly 2, a telescopic component 3, and a buffer mechanism 4.

[0021] The protective plate assembly 2 includes a support plate 21 rotatably connected to the underside of the anti-collision beam 1, and a protective plate 22 located on the side of the support plate 21 away from the vehicle; the fixed end of the telescopic member 3 is hinged to the front end of the vehicle, and the piston end of the telescopic member 3 is hinged to the support plate 21. The telescopic member 3 can be flipped to the bottom and front of the anti-collision beam 1 through its telescopic movement; one end of the buffer mechanism 4 is fixed to the support plate 21, and the other end passes through the support plate 21 and is connected to the protective plate 22.

[0022] It should be noted that, as Figures 1-3As shown in the specific embodiments of this application, there are at least two telescopic members 3 and buffer mechanisms 4.

[0023] Specifically, such as Figure 1 and Figure 2 As shown, the rotation angle of the support plate 21 ranges from 270° to 360°, so that the protective plate assembly 2 is in a vertical position relative to the front bumper beam 1 of the vehicle and protrudes in front of the bumper beam 1 in the working state. The vertical height of the protective plate 22 actively reduces the vehicle's ground clearance. When a collision occurs, the vertically arranged protective plate 22 can effectively block and push away pedestrians, non-motorized vehicles and other collision objects, preventing collision objects from being pulled under the vehicle chassis from the source, thereby minimizing the risk of personal injury and property damage and improving vehicle driving safety. In the non-working state, the protective plate assembly 2 is horizontally stored under the bumper beam 1, effectively maintaining the original ground clearance of the vehicle and ensuring that the vehicle's driving passability is not affected.

[0024] In a specific embodiment of this application, the two ends of the protective plate 22 extend toward the rear of the vehicle in a direction parallel to the vehicle. The corners of the extended sections adopt a smooth arc transition design. Compared with a right-angle structure, the arc corner can disperse the stress concentration when an external force impacts, reduce the risk of cracking at the corner due to frequent vibration or collision, extend the service life of the protective plate 22, eliminate the safety hazards of sharp right angles, prevent pedestrians or objects from being scratched when in working posture, and at the same time ensure that the injury caused by accidental collision is reduced when not in working posture.

[0025] In a specific embodiment of this application, the buffer mechanism 4 includes a fixed part 41 fixed to the support plate 21, and a piston part 42 that slides through the support plate 21 and is dampedly inserted into the fixed part 41. A fixing ring 421 is coaxially fixed to one end of the piston part 42 away from the fixed part 41.

[0026] It should be noted that the buffer mechanism 4 is an elastic buffer structure with damping, which is already very mature in the existing technology and will not be described in detail here.

[0027] It is understandable that the piston part 42 can be fixedly connected to the protective plate 22 directly through the fixing ring 421. In this way, the protective plate 22 has a buffer displacement effect relative to the support plate 21 in the working posture. When the protective plate 22 comes into contact with a pedestrian or object and performs a pushing action, the buffer displacement can effectively absorb the collision energy and avoid the direct effect of rigid impact, thereby significantly reducing the degree of pedestrian injury and the probability of object damage, and further improving the safety protection efficiency of the protection system.

[0028] It should be noted that, in the specific embodiments of this application, the protective plate 22 is made of fiberglass.

[0029] It should be further explained that an ECU is installed inside the vehicle, and a camera is installed at the front of the vehicle to monitor the situation in front of the vehicle in real time. The ECU receives the signals collected by the front camera, judges the vehicle's operating condition, and issues commands to adjust the extension and retraction of the piston end of the telescopic component 3, thereby adjusting the operation or retraction of the protective plate 22. To avoid misjudgment during engineering operations in the city, a switch-controlled solenoid valve needs to be added in the cab. The switch enable takes precedence over the ECU's scenario judgment. The operation or retraction status of the protective plate 22 is sent to the instrument panel via signals. The instrument panel associates the two behaviors of the protective plate 22 with the illumination of lights or other visual means. The principle is explained in [link to technical details]. Figure 7 .

[0030] In a specific embodiment of this application, the telescopic component 3 is a cylinder, which can be directly supplied with air from the air tank or the air pipe of the cargo truck via a T-junction, making it relatively simple to implement.

[0031] Example 2

[0032] like Figure 1 , Figure 2 , Figures 4-6 As shown, the pedestrian protection device at the front of a truck of this utility model also includes a displacement structure. One side of the displacement structure is connected to the protective plate 22, and the other side of the displacement structure is connected to the buffer mechanism 4. The displacement structure has the ability to move laterally and vertically along the support plate 21.

[0033] Specifically, the displacement structure includes a lateral displacement mechanism 5 and a vertical displacement mechanism 6.

[0034] The lateral displacement mechanism 5 includes two lateral locking strips 51, two sets of lateral buffer components 52, and two lateral slide blocks 53. The two lateral locking strips 51 are arranged side by side (along the width direction of the vehicle front), and the two sets of lateral buffer components 52 are correspondingly arranged within the two lateral locking strips 51. The two lateral slide blocks 53 are symmetrically locked to the piston part 42 and fixed to the retaining ring 421. The two lateral slide blocks 53 slide within the two lateral locking strips 51 and are slidably sleeved on each corresponding set of lateral buffer components 52. The vertical displacement mechanism 6 includes two vertical... The system includes a snap-fit ​​strip 61, two sets of vertical buffer components 62, and two vertical slide blocks 63. The two vertical snap-fit ​​strips 61 are fixed side by side to the side of the protective plate 22 facing the support plate 21. The two sets of vertical buffer components 62 are correspondingly arranged inside the two vertical snap-fit ​​strips 61. The two vertical slide blocks 63 are respectively fixed to the corresponding horizontal snap-fit ​​strips 51. The two vertical slide blocks 63 slide on the two vertical snap-fit ​​strips 61 and slide in cooperation with the two sets of vertical buffer components 62. The two vertical snap-fit ​​strips 61 and the two horizontal snap-fit ​​strips 51 are arranged in the same plane at right angles.

[0035] like Figure 5As shown, a transverse groove 511 is provided on one side of the transverse snap-fit ​​strip 51. The transverse buffer assembly 52 includes a transverse guide rod 521 fixedly connected to the transverse groove 511 along the length direction. Two transverse buffer elastic members 522 are symmetrically sleeved on the transverse guide rod 521. End plates 523 are fixedly connected to the ends of the two transverse buffer elastic members 522 that are close to each other. The two end plates 523 are slidably sleeved on the transverse guide rod 521 and abut against both sides of the transverse slide block 53.

[0036] It should be noted that end plate 523 slides on the transverse slide groove 511.

[0037] The transverse slide block 53 includes a transverse slider 531 that is slidably sleeved on the transverse guide rod 521. The transverse slider 531 is slidably disposed in the transverse slide groove 511. A fixing sleeve 532 is fixedly connected to the side of the transverse slider 531 facing the piston part 42. The fixing sleeve 532 is snapped into the piston part 42 and fixedly connected to the fixing ring 421.

[0038] like Figure 6 As shown, a vertical groove 611 is provided on one side of the vertical snap-fit ​​strip 61. The vertical buffer assembly 62 includes a vertical guide rod 621 fixedly connected to the vertical groove 611 along its length. When the vertical guide rod 621 is in the vertical direction, a vertical buffer elastic member 622 is sleeved on its downward end. One end of the vertical buffer elastic member 622 abuts against the side wall of the vertical groove 611. The other end of the vertical buffer elastic member 622 is fixedly connected to an end plate 623, which is slidably sleeved on the vertical guide rod 621.

[0039] It should be noted that end plate 623 slides on the vertical groove 611.

[0040] The vertical slide block 63 includes a connecting plate 631 fixed to the horizontal snap-fit ​​strip 51. A vertical slider 632 is fixed to one end of the connecting plate 631. The two sides of the vertical slider 632 slide in the vertical groove 611 respectively. The vertical slider 632 is slidably sleeved on two vertical guide rods 621.

[0041] It should be noted that when the two vertical sliders 632 are in a vertical direction, the bottom end of the downward-facing vertical slider 632 is fixed to the end plate 623.

[0042] It should be further noted that, in the specific embodiments of this application, the horizontal snap-fit ​​strip 51 does not extend beyond both ends of the protective plate 22, so as to avoid the top of the protective plate 22 extending out of the protective plate 22 causing injury to pedestrians or objects in the vertical working state, and the bottom of the protective plate 22 extending out of the protective plate 22 scraping against the ground.

[0043] Understandably, when the protective plate assembly 2 is in its working posture (vertical state), if a pedestrian or object impacts the protective plate 22 and generates a lateral force, the protective plate 22 will cause the vertical displacement mechanism 6, the horizontal locking strip 51, and the horizontal guide rod 521 to move laterally relative to the horizontal slider 531 and the piston part 42. At this time, the lateral buffer elastic element 522 in front of the displacement will be compressed, giving the protective plate 22 a buffering effect. The design of the two sets of lateral buffer assemblies 52 on both sides ensures that the protective plate 22 has a buffering effect in both directions of lateral displacement when subjected to lateral force. Furthermore, in its working posture, if the ground is uneven, even if the protective plate 22 touches the ground, it will... The vertical locking strip 61 moves upward relative to the vertical slider 632 to prevent damage to the protective plate 22. During this process, the vertical buffer elastic element 622 is stretched, giving the protective plate 22 downward elastic potential energy. This facilitates its reset while providing a flexible buffering effect, preventing the bottom of the protective plate 22 from suddenly moving upward after being subjected to force. This ensures the distance between the bottom of the protective plate 22 and the ground. Of course, during the process of the protective plate assembly 22 changing from a non-working posture to a working posture, the vertical locking strip 61 has an upward buffering effect relative to the vertical slider 632. This also prevents the protective plate 22 from being unable to move and resulting in rigid compression, which could damage the protective plate 22 or prevent the protective plate 22 from being unable to change to a working posture.

[0044] The above embodiments are only used to illustrate specific implementations of this utility model and are not limited thereto. For those skilled in the art, based on the concept of this utility model, many similar modifications and transformations can be made, and these modifications and transformations should all be considered within the protection scope of this utility model.

Claims

1. A pedestrian protection device for the front end of a freight vehicle, comprising a crash beam (1) installed at the front of the vehicle, characterized in that, include: The protective plate assembly (2) and the telescopic component (3) include a support plate (21) rotatably connected to the underside of the anti-collision beam (1) and a protective plate (22) located on the side of the support plate (21) away from the vehicle. The fixed end of the telescopic component (3) is hinged to the front end of the vehicle, and the piston end of the telescopic component (3) is hinged to the support plate (21). The telescopic action of the telescopic component (3) allows the protective plate assembly (2) to be flipped to the bottom and front of the anti-collision beam (1). A buffer mechanism (4) is provided, with one end fixed to the support plate (21) and the other end passing through the support plate (21) and connected to the protective plate (22). The buffer mechanism (4) enables the protective plate (22) to have elastic buffering capability relative to the support plate (21).

2. The pedestrian protection device at the front of a freight vehicle as described in claim 1, characterized in that, The range of the flip angle of the support plate (21) is 270°-360°.

3. The pedestrian protection device at the front of a freight vehicle as described in claim 1, characterized in that, The protective plate (22) extends towards the vehicle at both ends, and the corners are arc-shaped.

4. The pedestrian protection device at the front of a freight vehicle as described in claim 1, characterized in that, The buffer mechanism (4) includes a fixing part (41) fixed to the support plate (21) and a piston part (42) that slides through the support plate (21) and is damped and inserted into the fixing part (41). A fixing ring (421) is coaxially fixed to one end of the piston part (42) away from the fixing part (41).

5. A pedestrian protection device for the front end of a freight vehicle as described in claim 4, characterized in that, It also includes a displacement structure, which includes a lateral displacement mechanism (5) and a vertical displacement mechanism (6). The lateral displacement mechanism (5) includes two lateral locking strips (51), two sets of lateral buffer components (52), and two lateral slides (53). The two lateral locking strips (51) are arranged side by side, and the two sets of lateral buffer components (52) are correspondingly arranged in the two lateral locking strips (51). The two lateral slides (53) are symmetrically locked to the piston part (42) and fixed to the fixing ring (421). The two lateral slides (53) slide in the two lateral locking strips (51) and slide on each corresponding set of lateral buffer components (52). The vertical displacement mechanism (6) includes two vertical locking strips (61), two sets of vertical buffer components (62), and two vertical slides (63). The two vertical locking strips (61) are fixed side by side to the side of the protective plate (22) facing the support plate (21). The two sets of vertical buffer components (62) are correspondingly arranged in the two vertical locking strips (61). The two vertical slides (63) are respectively fixed to the corresponding horizontal locking strips (51). The two vertical slides (63) slide on the two vertical locking strips (61) and slide in cooperation with the two sets of vertical buffer components (62). The two vertical snap-fit ​​strips (61) and the two horizontal snap-fit ​​strips (51) are arranged in the same plane at right angles.

6. A pedestrian protection device for the front end of a freight vehicle as described in claim 5, characterized in that, A transverse groove (511) is provided on one side of the transverse snap-fit ​​strip (51). The transverse buffer assembly (52) includes a transverse guide rod (521) fixedly connected to the transverse slide groove (511) along the length direction. Two transverse buffer elastic members (522) are symmetrically sleeved on the transverse guide rod (521). One end plate (523) is fixedly connected to one end of the two transverse buffer elastic members (522) that are close to each other. The two end plates (523) are slidably sleeved on the transverse guide rod (521) and abut against both sides of the transverse slide block (53).

7. A pedestrian protection device for the front end of a freight vehicle as described in claim 6, characterized in that, The transverse slide block (53) includes a transverse slider (531) that is slidably sleeved on the transverse guide rod (521). The transverse slider (531) is slidably disposed in the transverse slide groove (511). A fixing sleeve (532) is fixedly connected to the side of the transverse slider (531) facing the piston part (42). The fixing sleeve (532) is snapped into the piston part (42) and fixedly connected to the fixing ring (421).

8. A pedestrian protection device for the front end of a freight vehicle as described in claim 6, characterized in that, A vertical groove (611) is provided on one side of the vertical snap-fit ​​strip (61). The vertical buffer assembly (62) includes a vertical guide rod (621) fixedly connected to the vertical slide groove (611) along its length. When the vertical guide rod (621) is in the vertical direction, a vertical buffer elastic member (622) is sleeved on its downward end. One end of the vertical buffer elastic member (622) abuts against the side wall of the vertical slide groove (611), and the other end of the vertical buffer elastic member (622) is fixedly connected to an end plate (623). The end plate (623) is slidably sleeved on the vertical guide rod (621).

9. A pedestrian protection device for the front end of a freight vehicle as described in claim 8, characterized in that, The vertical slide block (63) includes a connecting plate (631) fixed to the horizontal snap-fit ​​strip (51), a vertical slider (632) fixed to one end of the connecting plate (631), the two sides of the vertical slider (632) sliding in the vertical groove (611), and the vertical slider (632) slidingly sleeved on the two vertical guide rods (621).

10. A pedestrian protection device for the front end of a freight vehicle as described in claim 9, characterized in that, When the two vertical sliders (632) are in a vertical direction, the bottom end of the downward-facing vertical slider (632) is fixed to the end plate (623).

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