Automobile multi-connecting-rod machine cover device
By employing a multi-link mechanism and a recoverable pedestrian protection design, the problem of vehicle hoods being unable to recover after a collision is solved, achieving hood stability and smoothness, reducing maintenance costs and time, and improving the economy and convenience of use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-02
- Publication Date
- 2026-03-27
AI Technical Summary
In the existing technology, the pedestrian protection system of the vehicle hood is a one-time design that cannot be restored after a collision, resulting in high maintenance costs and long repair times. In addition, the hinge structure is complex and prone to wear and loosening, which affects the normal use of the hood.
Employing a multi-link mechanism and a recoverable pedestrian protection design, the hood is able to rotate recoverably through the cooperation of the hood, hood connectors, vehicle body connectors, rotating connectors, and pedestrian protection components. Upon collision, the pedestrian protection components are triggered to lift the hood, and a deflagration ejection tube and limit plate structure are used to achieve buffer protection.
It reduces the probability of wear and tear and malfunctions, ensures the stability and smoothness of the cover during opening and closing, avoids the need for complete replacement, reduces maintenance costs and time, and improves the economy and convenience of use.
Smart Images
Figure CN121734291A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of automobile manufacturing, in particular to a multi-link hood device of an automobile. BACKGROUND
[0002] In the field of automobile manufacturing, the hood is an important part of the vehicle, which not only plays a role in protecting various components in the engine compartment, but also has an important influence on the overall appearance of the vehicle. The hood and the vehicle body are usually connected by a high-strength hinge connection structure. This hinge connection structure is specially designed and treated to have good load-bearing capacity and durability, and can withstand the pressure and friction caused by the frequent opening and closing of the hood. At the same time, in order to minimize the harm to pedestrians when the vehicle collides with pedestrians at the front end, the hood usually adopts a collapsible design. When the collision occurs, the hood can produce a certain degree of collapse deformation according to the preset mode, thereby absorbing and dispersing the collision energy and reducing the impact force on the body of the pedestrian.
[0003] In the prior art, the pedestrian protection system of the vehicle hood is a one-time design. Once the collapse deformation is triggered in the collision, the hood hinge cannot be restored to its original state, and the entire hood needs to be replaced. This not only greatly increases the maintenance cost, but also prolongs the vehicle repair time, causing many inconveniences to the vehicle owner. In addition, the hinge structure with pedestrian protection function is relatively complex, and there are many connection points between the structures. In the long-term use process, it is easy to appear the situation of wear and loose, which affects the smoothness of the opening and closing of the hood and increases the probability of failure, affecting the normal use of the hood. SUMMARY
[0004] In view of the shortcomings of the prior art, the present application provides a multi-link hood device of an automobile, which solves the problem that in the prior art, the pedestrian protection system of the vehicle hood is a one-time design. Once the collapse deformation is triggered in the collision, the hood hinge cannot be restored to its original state, and the entire hood needs to be replaced. This not only greatly increases the maintenance cost, but also prolongs the vehicle repair time, causing many inconveniences to the vehicle owner. In addition, the hinge structure with pedestrian protection function is relatively complex, and there are many connection points between the structures. In the long-term use process, it is easy to appear the situation of wear and loose, which affects the smoothness of the opening and closing of the hood and increases the probability of failure, affecting the normal use of the hood.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-link hood device for automobiles, including a hood, with hood connectors fixedly connected to both sides of the bottom of the hood, a vehicle body connector disposed below the hood connectors, and a rotating connector hinged to one bottom end of the hood connectors. The multi-link hood device also includes a rotating connection structure disposed on the side where the vehicle body connector and the rotating connector are close to each other; a pedestrian protection component is disposed below the rotating connector; wherein, the rotating connection structure connects the vehicle body connector and the rotating connector, enabling the hood, hood connectors, and rotating connectors to rotate at a certain angle, and in the event of a pedestrian collision, the pedestrian protection component triggers and lifts the hood and hood connectors.
[0006] Preferably, the rotary connection structure includes a first link hinged to the top of one side of the vehicle body connector and the other end hinged to the rotary connector; a second link hinged to the side of the vehicle body connector away from the first link and the other end hinged to the rotary connector; an angle adjustment structure is disposed on the side of the vehicle body connector where the first link and the second link are close to each other; a lateral adjustment component is disposed on the outer wall of the vehicle body connector away from the second link; wherein, through the cooperation of the first link and the second link, the rotary connector and the vehicle body connector can be stably rotary connected, the closing angle of the hood of the angle adjustment structure is adjusted, and the lateral adjustment component finely adjusts the lateral position of the rotary connector.
[0007] Preferably, the angle adjustment structure includes a side plate, which is located on the top of the vehicle body connector on the side where the first link and the second link are close to each other; an adjusting bolt is threaded to the inner wall of the side plate; a locking nut is fitted to the bottom of the side plate and threaded to the outer wall of the adjusting bolt; a lower protrusion is located on the side of the first link away from the hood, and its outer wall is fitted to the adjusting bolt; a limiting protrusion is located at the end of the rotating connector away from the hood connector and is fitted to the vehicle body connector; wherein, when the hood is closed, the adjusting bolt abuts against and limits the lower protrusion of the first link, and the closing angle of the hood can be adjusted by adjusting the fixed height of the adjusting bolt in the side plate, and the limiting protrusion limits the hood after it is opened.
[0008] Preferably, the lateral adjustment component includes a ball joint pin, which is located on the side of the rotating connector away from the second link and is threaded to the inner wall of the rotating connector; a clearance groove is formed on the side wall of the hood connector and is correspondingly provided on the ball joint pin; wherein, by rotating the ball joint pin, its screw-in depth is adjusted, thereby fine-tuning the lateral position of the rotating connector in the vehicle body, ensuring that the lateral clearance between the hood and the vehicle frame is uniform during opening and closing, and the clearance groove provides space for adjusting the ball joint pin.
[0009] Preferably, the pedestrian protection component includes an ejection port, which is located at the top of the rotating connector and below the hood connector; a lower folding plate is located at the top of the hood connector and extends through the inner wall of the ejection port; a limiting plate is fixedly connected to the inner wall of the lower folding plate, and its two ends are connected to the rotating connector; a deflagration ejection tube is located on one side of the vehicle body connector, and its output end is connected to the lower folding plate; a stroke limiting structure is located on the outer wall of the hood connector; and an ejection limiting structure is located on the side of the rotating connector below the ball joint pin and away from the second link. Through the cooperation of the lower folding plate and the limiting plate, the rotating connector and the hood connector maintain a stable connection when no pedestrian collision occurs. When a pedestrian collision occurs, the deflagration ejection tube is activated rapidly, pushing the lower folding plate upwards to impact and break the limiting plate, causing the hood and the hood connector to rotate and spring upwards.
[0010] Preferably, the stroke limiting structure includes a stroke limiting hole, which is opened on the outer wall of the cover connector away from the clearance groove; the stroke limiting pin is clearance-fitted to the inner wall of the stroke limiting hole and fixedly connected to the rotating connector; wherein, through the cooperation of the stroke limiting hole and the stroke limiting pin, the rotation stroke of the cover connector is limited when the cover connector springs up.
[0011] Preferably, the ejection limiting structure includes a lower convex plate, which is located on the side of the rotating connector below the ball head pin and away from the second connecting rod; a fixing rivet is fixedly connected to the inner wall of the lower convex plate; a limiting cam is rotatably connected to the outer wall of the fixing rivet and is also connected to the bottom of the cover connector; an arc-shaped plate is located on the side of the lower convex plate near the explosive ejection tube; a torsion spring is connected to the outer wall of the fixing rivet, and its two ends are respectively connected to the limiting cam and the arc-shaped plate; wherein, when the cover connector springs upward, the limiting cam rotates under the action of the torsion spring, so that the protrusion of the limiting cam abuts against the bottom of the cover connector, thereby supporting and limiting the cover connector.
[0012] Preferably, the pedestrian protection component further includes a fixing plate, which is disposed on the bottom side of one side of the vehicle body connector. A limiting groove is formed on the outer wall of the fixing plate and is connected to the outer wall of the explosive ejection tube. The fixing plate and the limiting groove are used to limit the explosive ejection tube, so that the impact force generated by the explosion can be accurately transmitted to the lower folding plate.
[0013] Preferably, the top of the cover connector is provided with a reinforcing groove.
[0014] Beneficial effects This invention provides a multi-link hood device for automobiles. It offers the following advantages: This multi-link hood device, through the cooperation of the hood, hood connectors, body connectors, rotating connectors, rotating connection structures, and pedestrian protection components, employs a multi-link mechanism and a recoverable pedestrian protection design. While ensuring the effective functioning of pedestrian protection, it simplifies the hood's hinge structure, reducing the probability of wear and malfunction. It ensures good stability and smoothness during opening and closing of the hood. Furthermore, by improving the structure of the pedestrian protection module, it avoids irreversible damage to the entire hinge structure of the hood after the pedestrian protection function is triggered. By replacing and adjusting some components, the hood can be restored to normal use. When the hood is undamaged, it avoids the high cost and lengthy maintenance of replacing the entire hood, thus contributing to improved vehicle economy and convenience.
[0015] Through the cooperation of the hood connector, rotating connector, ejection port, lower folding plate, limiting plate, and explosive ejection tube, the lower folding plate is pushed upward by explosive impact. When the limiting plate is subjected to a certain impact force, it deforms or breaks, allowing the hood connector and hood to rotate upward and spring up, providing effective cushioning protection for pedestrians. After the pedestrian protection is triggered, the hood can be restored to normal use by replacing the limiting plate and explosive ejection tube, without the need to replace the entire car hood and its hinge structure. This helps to reduce maintenance costs and time. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a rear view of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention in its collapsed state; Figure 4 This is a schematic diagram of the appearance of the present invention; Figure 5 This is a schematic diagram of the appearance of the vehicle body connector, side plate, and fixing plate in this invention; Figure 6 This is a schematic diagram showing the external appearance of the rotating connector, ejection port, and lower convex plate in this invention; Figure 7 for Figure 2 A magnified view of a portion of region A in the middle; Figure 8 for Figure 4 A magnified view of a portion of region B in the middle; Figure 9 for Figure 4 A magnified view of a portion of region C.
[0017] In the diagram: 1. Hood; 2. Hood connector; 3. Body connector; 4. Rotary connector; 5. Rotary connection structure; 6. Pedestrian protection component; 51. First link; 52. Second link; 53. Angle adjustment structure; 54. Lateral adjustment component; 531. Side plate; 532. Adjusting bolt; 533. Locking nut; 534. Lower protrusion; 535. Limiting protrusion; 541. Ball pin; 542. 61. Ejection port; 62. Lower folding plate; 63. Limiting plate; 64. Explosive ejection tube; 65. Stroke limiting structure; 66. Ejection limiting structure; 651. Stroke limiting hole; 652. Stroke limiting pin; 661. Lower convex plate; 662. Fixing rivet; 663. Limiting cam; 664. Arc plate; 665. Torsion spring; 67. Fixing plate; 68. Limiting groove; 7. Reinforcing groove. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] In existing technologies, the pedestrian protection system of a vehicle hood is a one-time design. Once it is triggered by crumple zone deformation in a collision, the hood hinge cannot return to its original state, requiring the entire hood to be replaced. This not only greatly increases maintenance costs but also prolongs vehicle repair time, causing many inconveniences for car owners. In addition, the hinge structure with pedestrian protection function is relatively complex, with many connection points between the structures. During long-term use, wear and loosening are prone to occur, affecting the smoothness of the hood's opening and closing, increasing the probability of malfunction, and affecting the normal use of the hood.
[0020] In view of this, the present invention provides a multi-link hood device for automobiles. Through the cooperation between the hood, hood connectors, vehicle body connectors, rotating connectors, rotating connection structures, and pedestrian protection components, and employing a multi-link mechanism and a recoverable pedestrian protection design, the hinge structure of the automobile hood can achieve smooth and precise rotational movement of the hood, and effectively control the opening and closing angle and position of the hood. While ensuring the effective functioning of pedestrian protection, it simplifies the hinge structure of the hood, reduces the probability of wear and failure, and ensures that the hood maintains good stability and smoothness during opening and closing. By improving the structure of the pedestrian protection module, after the pedestrian protection function is triggered, irreversible damage to the entire hinge structure of the hood is avoided. By replacing and adjusting some components, the hood can be restored to a normal working state. When the hood is not damaged, the high cost and long maintenance time of replacing the entire automobile hood are avoided, thereby improving the economy and convenience of automobile use.
[0021] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process.
[0022] Depend on Figures 1-9 It is known that the multi-link hood device of an automobile includes a hood 1, with hood connectors 2 fixedly connected to both sides of the bottom of the hood 1. A vehicle body connector 3 is provided below the hood connector 2, and a rotating connector 4 is hinged to one end of the bottom of the hood connector 2. The multi-link hood device of an automobile also includes a rotating connection structure 5 and a pedestrian protection component 6. The rotating connection structure 5 is located on the side where the vehicle body connector 3 and the rotating connector 4 are close to each other; the pedestrian protection component 6 is located below the rotating connector 4. The rotating connection structure 5 connects the vehicle body connector 3 and the rotating connector 4, enabling the hood 1, the hood connector 2, and the rotating connector 4 to rotate at a certain angle. In the event of a pedestrian collision, the pedestrian protection component 6 triggers and lifts the hood 1 and the hood connector 2. In the specific implementation process, it is worth noting that the hood 1 is a common automotive component that protects components such as the engine. Through the cooperation of the hood connector 2, the body connector 3, and the rotating connector 4, it forms the basic components of the automotive hood hinge connection structure. The hood connector 2 is fixed to the hood 1 by rivets, bolts, or welding. One end of the rotating connector 4 is hinged to the hood connector 2 by rivets and can rotate around the hinge point with the hood connector 2. The other end of the rotating connector 4 is connected to the body connector 3 via two connecting rods. The body connector 3 is fixed to the vehicle body by bolts, thus ensuring a stable connection between the hood 1 and the vehicle body. Initially, the hood connector 2 and the rotating connector 4 are relatively stationary. They rotate together via two connecting rods between the body connector 3 and the rotating connector 4, thus opening and closing the hood 1. The rotating connection structure 5 plays a crucial connecting and supporting role for the rotating connector 4. Connecting the body connector 3 and the rotating connector 4 via two connecting rods, the hinge of the hood 1 forms a stable four-bar linkage. This allows the rotating connector 4 to achieve smooth and precise rotation of the hood 1 during its connection with the body connector 3, effectively controlling the opening and closing angle and position of the hood 1, ensuring good stability and smoothness during opening and closing. To meet daily usage needs, the pedestrian protection component 6 is used to provide effective cushioning protection for pedestrians in the event of a pedestrian collision by triggering the lifting of the hood 1 and hood connector 2, without causing irreversible damage to the hinge structure of the hood 1. By replacing and adjusting the trigger ejection component and the limiting component, the hood 1 can be restored to its normal working state. If the hood 1 is undamaged, this avoids the high cost and lengthy maintenance of replacing the entire car hood. Through the cooperation between the hood 1, hood connector 2, body connector 3, rotating connector 4, rotating connection structure 5, and pedestrian protection component 6, a multi-link mechanism and a recoverable pedestrian protection design are employed to ensure that the hinge structure of the car hood can... This system enables smooth and precise rotation of the hood 1, and effectively controls the opening and closing angle and position of the hood 1. While ensuring the effective functioning of pedestrian protection, it simplifies the hinge structure of the hood 1, reduces the probability of wear and failure, and ensures that the hood 1 maintains good stability and smoothness during opening and closing. By improving the structure of the pedestrian protection module, it avoids irreversible damage to the entire hinge structure of the hood 1 after the pedestrian protection function is triggered. By replacing and adjusting some parts, the hood 1 can be restored to normal use. In the absence of damage to the hood 1, it avoids the high cost and long maintenance time of replacing the entire car hood, thereby improving the economy and convenience of car use. Furthermore, the rotating connection structure 5 includes a first link 51, a second link 52, an angle adjustment structure 53, and a lateral adjustment component 54. The first link 51 is hinged to the top of one side of the vehicle body connector 3, and the other end is hinged to the rotating connector 4. The second link 52 is hinged to the side of the vehicle body connector 3 away from the first link 51, and the other end is hinged to the rotating connector 4. The angle adjustment structure 53 is located on the side of the vehicle body connector 3 where the first link 51 and the second link 52 are close to each other. The lateral adjustment component 54 is located on the outer wall of the vehicle body connector 3 at the end away from the second link 52. Through the cooperation of the first link 51 and the second link 52, the rotating connector 4 and the vehicle body connector 3 can be stably rotated together. The angle adjustment structure 53 adjusts the closing angle of the hood 1, and the lateral adjustment component 54 finely adjusts the lateral position of the rotating connector 4. In the specific implementation process, it is worth noting that through the cooperation between the body connector 3, the rotating connector 4, the first link 51 and the second link 52, the first link 51 and the second link 52 are respectively hinged between the body connector 3 and the rotating connector 4, forming a stable four-bar linkage mechanism. This allows the rotating connector 4 to rotate smoothly and precisely around the connection point with the body connector 3. During the opening and closing of the hood 1, the four-bar linkage mechanism can effectively distribute the force and reduce the pressure at each connection point, thereby reducing the probability of wear and failure. The angle adjustment structure 53 is used to adjust the angle of the hood 1 after it is closed, ensuring that the fit between the hood 1 and the body reaches the best state, avoiding gaps that are too large or too small, which would affect the aesthetics and sealing of the vehicle. The lateral adjustment component 54 is used to limit the lateral position of the rotating connector 4 after the hood 1 is closed, so as to ensure that the gaps between the two sides of the hood 1 and the body are uniform and consistent, improving the overall aesthetics and assembly accuracy of the vehicle. Furthermore, the angle adjustment structure 53 includes a side plate 531, an adjusting bolt 532, a locking nut 533, a lower protrusion 534, and a limiting protrusion 535. The side plate 531 is located on the top of the vehicle body connector 3, on the side where the first link 51 and the second link 52 are close to each other. The adjusting bolt 532 is threaded to the inner wall of the side plate 531. The locking nut 533 is fitted to the bottom of the side plate 531 and threaded to the outer wall of the adjusting bolt 532. The lower protrusion 534 is located on the first link. 51 is located on the side away from the hood 1, and its outer wall is connected to the adjusting bolt 532; the limiting protrusion 535 is located at the end of the rotating connector 4 on the side away from the hood connector 2, and is connected to the vehicle body connector 3; wherein, when the hood 1 is closed, the adjusting bolt 532 abuts against the lower protrusion 534 of the first connecting rod 51 to limit it; by adjusting the fixed height of the adjusting bolt 532 in the side plate 531, the closing angle of the hood 1 can be adjusted; the limiting protrusion 535 limits it after the hood 1 is opened. In the specific implementation process, it is worth noting that after the cover 1 is closed, the adjusting bolt 532 abuts against the lower protrusion 534 at the top of the side plate 531 and the bottom of the first connecting rod 51 to limit the closing angle of the cover 1. By rotating the adjusting bolt 532 and fixing it with the locking nut 533, the height of the adjusting bolt 532 can be adjusted, thereby adjusting the angle position of the first connecting rod 51, thus realizing convenient adjustment of the closing angle of the cover 1. Furthermore, the lateral adjustment assembly 54 includes a ball head pin 541 and a recessed groove 542. The ball head pin 541 is located on the side of the rotating connector 4 away from the second connecting rod 52 and is threaded to the inner wall of the rotating connector 4. The recessed groove 542 is formed on the side wall of the hood connector 2 and is correspondingly located on the ball head pin 541. By rotating the ball head pin 541, its screw-in depth is adjusted, thereby fine-tuning the lateral position of the rotating connector 4 in the vehicle body to ensure that the lateral gap between the hood 1 and the vehicle frame is uniform during opening and closing. The recessed groove 542 provides space for the adjustment of the ball head pin 541. In the specific implementation process, it is worth noting that during the opening and closing of the hood 1, the ball end of the ball pin 541 contacts the inner wall of the vehicle frame. By rotating the ball pin 541 to adjust its screw-in depth, the lateral position of the rotating connector 4 in the vehicle body can be finely adjusted, so that the lateral gap between the hood 1 and the vehicle frame is uniform and consistent, avoiding wear and abnormal noise problems caused by uneven lateral gap. The clearance groove 542 is used to provide sufficient space for the ball pin 541 to prevent the ball pin 541 from interfering with the hood connector 2 during the opening and closing of the hood 1. Furthermore, the pedestrian protection component 6 includes an ejection port 61, a lower folding plate 62, a limiting plate 63, a deflagration ejection tube 64, a travel limiting structure 65, and an ejection limiting structure 66. The ejection port 61 is located on the top of the rotating connector 4, below the hood connector 2; the lower folding plate 62 is located on the top of the hood connector 2 and extends through the inner wall of the ejection port 61; the limiting plate 63 is fixedly connected to the inner wall of the lower folding plate 62, and its two ends are connected to the rotating connector 4; the deflagration ejection tube 64 is located on one side of the vehicle body connector 3, and its output end is connected to the lower folding plate 64. A folding plate 62 and a travel limiting structure 65 are disposed on the outer wall of the cover connector 2; an ejection limiting structure 66 is disposed on the side of the rotating connector 4 located below the ball pin 541 and away from the second link 52; wherein, through the cooperation of the lower folding plate 62 and the limiting plate 63, the rotating connector 4 and the cover connector 2 are kept in a stable connection state when no pedestrian collision occurs. When a pedestrian collision occurs, the explosive ejection tube 64 is quickly activated, pushing the lower folding plate 62 to move upward and impact the limiting plate 63, causing the cover 1 and the cover connector 2 to rotate upward and bounce up; In the specific implementation process, it is worth noting that the bottom end of the explosive ejection tube 64 is fixed to the vehicle frame. When a pedestrian collision occurs, the explosive ejection tube 64 receives a signal from the sensor and quickly activates. It generates a powerful thrust through its internal explosive device, pushing the piston rod to move at high speed. The top of the piston rod contacts the lower folding plate 62, thereby pushing the lower folding plate 62 upward. The limiting plate 63 is fixed to the inside of the lower folding plate 62 by bolts, and its two ends extend from the inside of the lower folding plate 62, forming a limit on both sides of the ejection port 61. Under normal conditions, this ensures that the hood connector 2 and the rotating connector 4 maintain a stable connection. When a pedestrian collision occurs, the piston rod of the explosive ejection tube 64 moves upward, pushing the lower folding plate 62 upward, causing the hood connector 2 to rotate upward around the hinge point with the rotating connector 4, thus pushing the lower folding plate upward. The shearing action of plate 62 and rotating connector 4 causes the limiting plate 63 to deform or break when subjected to a certain impact force, so that the hood connector 2 and hood 1 can rotate upward and pop up, providing effective buffer protection for pedestrians. After the pedestrian protection is triggered, the hood 1 can be restored to normal use by replacing the limiting plate 63 and the explosive ejection tube 64. If the hood 1 is not damaged, there is no need to replace the car hood and its entire hinge structure, which greatly reduces maintenance costs and time and improves the convenience of car use. The stroke limiting structure 65 is used to limit the pop-up stroke of the hood 1 to ensure that the pop-up height of the hood 1 is within a safe and effective range. The ejection limiting structure 66 is used to limit the hood 1 after it pops up to prevent the hood 1 from rebounding after popping up, ensuring the stability and reliability of the pedestrian protection function. Furthermore, the stroke limiting structure 65 includes a stroke limiting hole 651 and a stroke limiting pin 652. The stroke limiting hole 651 is opened on the outer wall of the cover connector 2 away from the clearance groove 542. The stroke limiting pin 652 is clearance-fitted to the inner wall of the stroke limiting hole 651 and is fixedly connected to the rotary connector 4. Through the cooperation of the stroke limiting hole 651 and the stroke limiting pin 652, the rotation stroke of the cover connector 2 is limited when the cover connector 2 springs up. In the specific implementation process, it is worth noting that when the hood connector 2 pops up, the travel limit pin 652 slides in the travel limit hole 651. When the travel limit pin 652 slides to the end of the travel limit hole 651, it will prevent the hood connector 2 from continuing to rotate upward, thereby limiting the pop-up travel of the hood 1 to a safe and effective range, which can prevent the hood 1 from causing unnecessary damage to the vehicle due to excessive pop-up height. Furthermore, the ejection limiting structure 66 includes a lower convex plate 661, a fixing rivet 662, a limiting cam 663, an arc-shaped plate 664, and a torsion spring 665. The lower convex plate 661 is located on the side of the rotating connector 4 below the ball joint pin 541 and away from the second connecting rod 52; the fixing rivet 662 is fixedly connected to the inner wall of the lower convex plate 661; the limiting cam 663 is rotatably connected to the outer wall of the fixing rivet 662 and is fitted to the bottom of the cover connector 2; the arc-shaped plate 664... Plate 664 is disposed on the side of the lower convex plate 661 near the explosive ejection tube 64; torsion spring 665 is connected to the outer wall of fixing rivet 662, and its two ends are respectively connected to limiting cam 663 and arc plate 664; wherein, when the cover connector 2 pops up, the limiting cam 663 rotates under the action of torsion spring 665, so that the protrusion of the limiting cam 663 abuts against the bottom of the cover connector 2, thereby supporting and limiting the cover connector 2; In the specific implementation process, it is worth noting that under normal conditions, the torsion spring 665 stores a certain amount of elastic potential energy, keeping the limiting cam 663 in an initial position. When a pedestrian collision occurs and the cover connector 2 springs upward, the torsion spring 665 releases its elastic potential energy, causing the limiting cam 663 to rotate. This allows the protrusion of the limiting cam 663 to quickly provide effective support and limit the cover connector 2, effectively preventing the cover connector 2 from springing back and ensuring the stability and reliability of the pedestrian protection function. Furthermore, when the cover 1 returns to its normal operating state, the limiting cam 663 can be manually rotated back to its initial position, allowing the torsion spring 665 to store elastic potential energy again, thus restoring the ejection limiting structure 66 to its initial state. Furthermore, the pedestrian protection component 6 also includes a fixing plate 67 and a limiting groove 68. The fixing plate 67 is disposed on the bottom side of the vehicle body connector 3, and the limiting groove 68 is formed on the outer wall of the fixing plate 67 and is connected to the outer wall of the explosive ejection tube 64. The fixing plate 67 and the limiting groove 68 work together to limit the explosive ejection tube 64, so that the impact force generated by the explosion can be accurately transmitted to the lower folding plate 62. In the specific implementation process, it is worth noting that the deflagration ejection tube 64 is limited by the fixing plate 67 and the limiting groove 68 to ensure the stability and accuracy of the deflagration ejection tube 64 during operation. When the deflagration ejection tube 64 is activated, the fixing plate 67 and the limiting groove 68 can prevent it from generating unnecessary shaking and displacement, so that the impact force generated by the deflagration can be accurately transmitted to the lower folding plate 62, thereby pushing the lower folding plate 62 to move upward smoothly, so as to realize the reliable pop-up of the cover 1 and the cover connecting piece 2. Furthermore, a reinforcing groove 7 is provided on the top of the cover connector 2; In the specific implementation process, it is worth noting that the reinforcing groove 7 is used to improve the structural strength of the hood connector 2, enhance its resistance to deformation and impact, and enable the hood connector 2 to better withstand the impact force from the explosive ejection tube 64 and various forces during the hood 1 popping up when the pedestrian protection function is triggered, so as to prevent the hood connector 2 from being excessively deformed or damaged under strong impact force. The working principle of this application is illustrated below with a preferred embodiment: Under normal use, the hood 1 is stably connected to the vehicle body through a four-bar linkage consisting of the body connector 3, the rotating connector 4, the first link 51, and the second link 52. When the hood 1 is opened and closed, the body connector 3 and the rotating connector 4 maintain a stable connection, and the hood 1 rotates smoothly and precisely through the cooperation of the first link 51 and the second link 52. When a pedestrian collision occurs, the sensor transmits a signal to the deflagration ejection tube 64. The deflagration device inside the deflagration ejection tube 64 is quickly activated, generating a powerful thrust that pushes the piston rod upward at high speed. The top of the piston rod contacts the lower folding plate 62, pushing the lower folding plate 62 upward and impacting the limiting plate 63, causing the limiting plate 63 to deform or break, releasing the limiting at the ejection port 61. The lower folding plate 62 ejects upward from the ejection port 61, and the cover connector 2 drives the cover 1 around the hinge point with the rotating connector 4. As the cover 1 pops up, the travel limit pin 652 slides within the travel limit hole 651. When it slides to the end of the travel limit hole 651, it prevents the cover connector 2 from continuing to rotate upward, thus limiting the pop-up travel of the cover 1 within a safe and effective range. At the same time, when the cover connector 2 pops up, the torsion spring 665 releases its elastic potential energy, driving the limit cam 663 to rotate. The protrusion of the limit cam 663 abuts against the bottom of the cover connector 2, supporting and limiting the cover connector 2. After the pedestrian collision accident is handled, if the hood 1 is not damaged, remove the broken limiting plate 63 and the triggered explosive ejection tube 64, manually rotate the limiting cam 663 back to the initial position so that the torsion spring 665 can store elastic potential energy again, press the hood connector 2 to make it close to the rotating connector 4, insert a new limiting plate 63 inside the lower folding plate 62 and fix it with bolts so that the limiting plate 63 is re-limited on both sides of the ejection port 61, and replace the explosive ejection tube 64 to restore the hood 1 to normal use.
[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-link hood assembly for automobiles, comprising a hood (1), characterized in that: Both sides of the bottom of the hood (1) are fixedly connected to hood connectors (2), and a vehicle body connector (3) is provided below the hood connector (2). A rotating connector (4) is hinged to one end of the bottom of the hood connector (2). The multi-link hood device for automobiles also includes: A rotating connection structure (5) is provided on the side where the vehicle body connector (3) and the rotating connector (4) are close to each other; Pedestrian protection component (6) is located below the rotating connector (4); The rotating connection structure (5) connects the vehicle body connector (3) and the rotating connector (4), enabling the hood (1), the hood connector (2) and the rotating connector (4) to rotate at a certain angle. When a pedestrian collision occurs, the pedestrian protection component (6) triggers the hood (1) and the hood connector (2) to lift up.
2. The multi-link hood assembly for automobiles according to claim 1, characterized in that: The rotary connection structure (5) includes: The first link (51) is hinged to the top of one side of the vehicle body connector (3), and the other end is hinged to the rotating connector (4). The second link (52) is hinged to the side of the vehicle body connector (3) away from the first link (51), and the other end is hinged to the rotating connector (4). An angle adjustment structure (53) is provided on the side of the vehicle body connector (3) where the first link (51) and the second link (52) are close to each other; A lateral adjustment component (54) is disposed on the outer wall of the vehicle body connector (3) at the end away from the second link (52); The first link (51) and the second link (52) work together to enable the rotating connector (4) and the vehicle body connector (3) to be stably rotated together. The angle adjustment structure (53) adjusts the closing angle of the hood (1). The lateral adjustment component (54) finely adjusts the lateral position of the rotating connector (4).
3. The multi-link hood assembly for automobiles according to claim 2, characterized in that: The angle adjustment structure (53) includes: The side plate (531) is located on the top of the vehicle body connector (3) on the side where the first link (51) and the second link (52) are close to each other; Adjusting bolt (532) is threaded to the inner wall of side plate (531); The locking nut (533) is fitted to the bottom of the side plate (531) and threaded to the outer wall of the adjusting bolt (532); The lower protrusion (534) is located on the side of the first connecting rod (51) away from the cover (1), and its outer wall is connected to the adjusting bolt (532). The limiting protrusion (535) is located at the end of the rotating connector (4) away from the hood connector (2) and is connected to the vehicle body connector (3). When the cover (1) is closed, the adjusting bolt (532) abuts against the lower protrusion (534) of the first connecting rod (51) and limits its position. By adjusting the fixed height of the adjusting bolt (532) in the side plate (531), the closing angle of the cover (1) can be adjusted. The limiting protrusion (535) limits the position after the cover (1) is opened.
4. The multi-link hood device for automobiles according to claim 2, characterized in that: The lateral adjustment assembly (54) includes: The ball head pin (541) is located on the side of the rotary connector (4) away from the second link (52) and is threaded to the inner wall of the rotary connector (4); The clearance groove (542) is opened on the side wall of the cover connector (2) and is correspondingly provided on the ball head pin (541). The ball head pin (541) is rotated to adjust its screw-in depth, thereby fine-tuning the lateral position of the rotating connector (4) in the vehicle body, ensuring that the lateral gap between the hood (1) and the vehicle frame is uniform during opening and closing. The recessed groove (542) provides space for adjusting the ball head pin (541).
5. The multi-link hood assembly for automobiles according to claim 4, characterized in that: The pedestrian protection component (6) includes: The ejection port (61) is located on the top of the rotating connector (4) and below the cover connector (2); The lower folding plate (62) is located on the top of the cover connector (2) and extends through the inner wall of the ejection port (61); The limiting plate (63) is fixedly connected to the inner wall of the lower folding plate (62), and both ends are connected to the rotating connector (4). An explosive ejection tube (64) is located on one side of the vehicle body connector (3), and its output end is connected to the lower folding plate (62). The stroke limiting structure (65) is provided on the outer wall of the cover connector (2); The ejection limiting structure (66) is located on the side of the rotating connector (4) below the ball head pin (541) away from the second link (52); In this way, through the cooperation of the lower folding plate (62) and the limiting plate (63), when no pedestrian collision occurs, the rotating connector (4) and the cover connector (2) are kept in a stable connection state. When a pedestrian collision occurs, the explosive ejection tube (64) is quickly activated, pushing the lower folding plate (62) to move upward and impact the limiting plate (63), causing the cover (1) and the cover connector (2) to rotate upward and bounce up.
6. The multi-link hood assembly for automobiles according to claim 5, characterized in that: The travel limiting structure (65) includes: The travel limit hole (651) is opened on the outer wall of the cover connector (2) on the side away from the clearance groove (542); The travel limit pin (652) is clearance-fitted to the inner wall of the travel limit hole (651) and is fixedly connected to the rotary connector (4). The rotational stroke of the cover connector (2) is limited by the cooperation of the travel limiting hole (651) and the travel limiting pin (652) when the cover connector (2) pops up.
7. The multi-link hood assembly for automobiles according to claim 5, characterized in that: The ejection limiting structure (66) includes: The lower convex plate (661) is located on the side of the rotating connector (4) below the ball head pin (541) away from the second link (52); A fixing rivet (662) is fixedly connected to the inner wall of the lower convex plate (661); The limiting cam (663) is rotatably connected to the outer wall of the fixing rivet (662) and is also connected to the bottom of the cover connector (2); An arc-shaped plate (664) is disposed on the side of the lower convex plate (661) near the explosive ejection tube (64); A torsion spring (665) is connected to the outer wall of a fixing rivet (662), and its two ends are respectively connected to a limiting cam (663) and an arc plate (664). When the cover connector (2) pops up, the limiting cam (663) rotates under the action of the torsion spring (665), so that the protrusion of the limiting cam (663) abuts against the bottom of the cover connector (2), thereby supporting and limiting the cover connector (2).
8. The multi-link hood assembly for automobiles according to claim 5, characterized in that: The pedestrian protection component (6) also includes: A fixing plate (67) is provided on one side of the bottom of the vehicle body connector (3). The limiting groove (68) is opened on the outer wall of the fixed plate (67) and is connected to the outer wall of the explosive ejection tube (64); The fixed plate (67) and the limiting groove (68) are used to limit the explosive ejection tube (64) so that the impact force generated by the explosive can be accurately transmitted to the lower folding plate (62).
9. The multi-link hood assembly for automobiles according to claim 1, characterized in that: The top of the hood connector (2) is provided with a reinforcing groove (7).