WO2023227001A1 - Engine hood buffer block support and buffer device - Google Patents

Abstract

An engine hood buffer block support, comprising : a breakable first support body (1) and a second support body (2), the first support body (1) being arranged below a buffer block (3) of an engine hood (4) and being connected to the second support body (2), the first support body (1) comprising a supporting body (11) and a mounting body (12), the mounting body (12) comprising a connection portion (121) and a mounting portion (122), the supporting body (11) and the connection portion (121) being connected by means of a plurality of breakable connection members (123), the second support body (2) comprising a holding portion (21), the holding portion (21) being provided with a mounting hole (22), and the first support body (1) being connected to the mounting hole (22) by means of the mounting portion (122). Further disclosed is an engine buffer device. The engine hood buffer block support can absorb collision energy by means of breakages, and can provide enough supporting strength without deformation, thereby ensuring a supporting effect on the engine hood, and allowing the engine hood to be normally opened and closed.

Description

Engine hood buffer block bracket and buffer device

This patent application claims priority to the Chinese patent application with the application number 202210570984.1 submitted on May 24, 2022, and the invention title is "A hood buffer block bracket and buffer device". The full text of the above application is incorporated by reference. in this application.

Technical field

The invention relates to the technical field of automobile parts, and in particular to an engine hood buffer block bracket and a buffer device.

Background technique

With the rapid development of smart electric vehicles, in order to provide customers with better safety guarantees, the safety performance requirements for vehicles have been further improved. The bonnet bumper of a car is usually located at an important position for pedestrian protection. In order to reduce the injuries suffered by pedestrians in a frontal collision with the vehicle, the stiffness of the parts in contact with the bumper is usually reduced to ensure that the hood is in place when a collision occurs. The position deforms and fully absorbs energy. However, when the vehicle normally opens and closes the hood, the parts in contact with the buffer block need to have sufficient stiffness and cannot deform to ensure the normal opening and closing performance of the hood. This will conflict with the needs of pedestrian protection. How to balance the stiffness of the two? Demand has become a difficult point in design.

In order to solve this problem, traditional vehicle models usually use plastic buffer blocks, which are connected to the body sheet metal through screw connections. The stiffness and strength of plastic itself are low, which can meet the needs of pedestrian protection.

technical problem

However, the durability and stability of plastic parts are poor. When the vehicle is driving and the engine hood is opened and closed, frequent vibrations and pressure will cause material fatigue in the buffer block bracket, causing the buffer block bracket to break at the location where it is connected to the body sheet metal, and the screw connection There is torque attenuation in the form and poor stability. This situation cannot be measured through simulation analysis and can only be tested through real vehicles. Once a problem occurs, it cannot be optimized through design and parts can only be replaced frequently.

Technical solutions

In order to solve the problem that in the existing technology, the plastic buffer block is connected to the vehicle body through screw connections. Due to its poor durability and stability, frequent vibration and pressure will cause material fatigue in the buffer block when the vehicle is driving and the engine hood is opened and closed. As a result, it breaks at the location where it is connected to the body sheet metal, resulting in poor stability.

The present application provides a hood buffer block bracket, which includes a breakable first bracket body and a second bracket body. The first bracket body is arranged below the buffer block of the hood and is connected with the second bracket body. connect;

The first bracket body includes a support body and an installation body. The installation body includes a connection part and an installation part. The support body and the connection part are connected through a plurality of breakable connectors;

The second bracket body includes a bearing portion, and a mounting hole is provided on the bearing portion. The first bracket body is connected to the second bracket body through the cooperation of the mounting portion and the mounting hole.

In some embodiments, the connecting portion is surrounding the outside of the support body, and two ends of the connecting piece are respectively connected to the bottom side wall of the support body and the inside of the connecting portion.

In some embodiments, the connecting part is annular, the supporting body is a cylindrical body or a truncated cone, and the outer diameter of the supporting body is smaller than the inner ring diameter of the connecting part.

In some embodiments, the number of the connecting members is 3-8, and they are arranged at circumferential intervals on the side walls of the support body.

In some embodiments, the maximum diameter of the support body is smaller than the diameter of the mounting hole, and when the connecting piece is broken, the support body can move downward through the mounting hole.

In some embodiments, the number of the mounting parts is at least two, and they are arranged at intervals below the connecting parts.

In some embodiments, the mounting portion is snap-fitted with the mounting hole.

In some embodiments, the mounting part includes an elastic arm extending downward from the connecting part and an anti-detachment part extending radially outward from the elastic arm, and the elastic arm passes through the anti-detachment part. It shrinks inward when passing through the mounting hole, and the anti-separation part is stuck with the second bracket body after passing through the mounting hole.

In some embodiments, the support strength of the first stent body material is less than the support strength of the second stent body material.

In some embodiments, the first bracket body is a plastic structure, and the second bracket body is a steel structure.

In some embodiments, the material of the first bracket body is plastic, and the support body and the mounting body of the first bracket body are integrally formed.

In some embodiments, the yield strength of the material of the second stent body is greater than or equal to 295 MPa.

In some embodiments, the second bracket body is a "N"-shaped mounting piece, and the bearing portion is a convex middle plane on the top of the second bracket body.

The application also provides a hood buffer device, which includes a hood, a buffer block and the hood buffer block bracket. The buffer block is connected to the hood, and the hood buffer block bracket is arranged on the buffer block. below the block.

beneficial effects

Implementing the embodiments of the present invention has the following beneficial effects:

In this application, when the vehicle normally opens and closes the hood, the buffer block exerts a small static pressure on the first bracket body. The buffer block bracket can provide sufficient stiffness without deformation, ensuring the normal opening and closing performance of the hood without fatigue of the buffer block. Failure affects the switch. When a vehicle collides, the connecting piece of the first support body can break and absorb energy, reducing damage to pedestrians.

The first bracket body of this application is a plastic structure, and the second bracket body is a high-strength steel part. The snap-in combination structure of plastic and high-strength steel uses the brittleness of plastic and the high strength of steel. When the vehicle collides, the engine hood will be severely damaged. In the event of a large impact, the first bracket body can absorb energy through fracture and absorb the collision energy. The second bracket body can provide sufficient support strength without deformation, thereby ensuring the support for the engine hood and allowing the engine hood to open and close normally.

The first bracket body and the second bracket body of the present application are snap-jointed and assembled, making replacement and maintenance easy.

Description of the drawings

Figure 1 is a schematic structural diagram of an engine hood buffer device in an embodiment of the present invention;

Figure 2 is a schematic structural diagram of the first bracket body in an embodiment of the present invention;

Figure 3 is a schematic structural diagram of the second bracket body in an embodiment of the present invention.

Among them, the reference numbers in the figure correspond to: 1-first bracket body, 11-support body, 12-installation body, 121-connection part, 122-installation part, 123-connector, 2-second bracket body, 21 -Bearing part, 22-mounting hole, 3-buffer block, 4-engine cover, 41-assembly hole.

Embodiments of the invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of To facilitate the description of the present invention and to simplify the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the present invention. The terms “first” and “second” are used for descriptive purposes only and shall not be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of these features.

In addition, in the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection" and other terms 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 an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Example

This embodiment provides a hood buffer device, which is used on the hood of a vehicle, so that when the hood is impacted, the hood buffer device can absorb the impact energy through fracture, thereby reducing damage to pedestrians. As shown in Figure 1, the hood buffer device includes an hood 4, a buffer block 3 and a hood buffer block bracket. The buffer block 3 is connected to the hood 4, and the hood buffer block bracket is arranged below the buffer block 3.

Specifically, the engine hood 4 is provided with an assembly hole 41, and the buffer block 3 is connected in the assembly hole 41 through a threaded structure. In some embodiments, the outer surface of the buffer block 3 is provided with external threads, and the assembly hole 41 is provided with internal threads. The threaded connection between the buffer block 3 and the assembly hole 41 makes the height position of the buffer block 3 relative to the engine hood 4 adjustable, and can be adapted to meet the needs of engine hoods in different positions of different models. When the position of the engine hood relative to the buffer block 3 changes due to vehicle driving vibration or switching, the relative position of the buffer block 3 and the engine hood can be adjusted by adjusting the engagement length of the thread.

This embodiment also provides a hood buffer block bracket. Through this structural design, when a pedestrian collides head-on with a vehicle, the instantaneous impact force will cause the structurally weak part of the buffer block bracket to break, thereby absorbing more energy. Reduce injuries to pedestrians; at the same time, when the vehicle normally opens and closes the hood, the hood buffer block bracket can provide sufficient stiffness to ensure the normal opening and closing performance of the hood.

Specifically, as shown in FIGS. 2 and 3 , the hood buffer block bracket includes a breakable first bracket body 1 and a second bracket body 2 connected to the first bracket body 1 . The first bracket body 1 is arranged below the buffer block 3 of the engine hood 4 , and the second bracket body 2 is arranged below the first bracket body 1 and connected with the first bracket body 1 .

The first bracket body 1 includes a support body 11 and a mounting body 12 . The support body 11 is a cylindrical body or a truncated cone body. The mounting body 12 includes a connecting part 121 and a mounting part 122 . The connecting portion 121 is annular and is surrounding the outside of the supporting body 11 . The support body 11 and the connecting portion 121 are connected through a plurality of breakable connecting pieces 123 . The mounting part 122 is provided below the connecting part 121 and connected with the connecting part 121 .

The second bracket body 2 includes a bearing portion 21, and a mounting hole 22 is provided on the bearing portion 21. The first bracket body 1 is connected to the second bracket body 2 through the cooperation of the mounting portion 122 and the mounting hole 22.

In this embodiment, when the vehicle normally opens and closes the hood, the buffer block 3 exerts a small static pressure on the first bracket body 1. The buffer block bracket can provide sufficient stiffness without deformation, ensuring the normal opening and closing performance of the hood. The fatigue failure of the buffer block 3 will not affect the opening and closing of the engine hood. When a vehicle collides and the hood is subject to a large impact, the first bracket body 1 can absorb energy through fracture and absorb the collision energy. The second bracket body 2 can provide sufficient support strength without deformation, thereby ensuring that the engine hood is protected. The supporting function allows the engine hood to open and close normally.

In some embodiments, the number of the mounting portions 122 is at least two, and they are arranged circumferentially at intervals below the connecting portion 121 . Preferably, the number may be two, three, four, five or six. The mounting portion 122 is engaged with the mounting hole 22 . Specifically, the mounting portion 122 passes through the mounting hole 22 to fix the connecting portion 121 and the supporting body 11 above the bearing portion 21 . The arrangement shape of the mounting portion 122 matches the mounting hole 22 . The mounting part 122 includes elastic arms extending downward from the connecting part 121. These elastic arms may be strips or sheets with the same or different shapes. In this embodiment, the mounting portions 122 arranged at intervals in an annular shape can shrink inward and gather together after receiving force, so that they can easily pass through the mounting holes 22 . Furthermore, the mounting portion 122 is also provided with a protruding anti-detachment portion extending radially outward from the elastic arm to prevent the mounting portion 122 from falling off from the mounting hole 22 . When the anti-detachment part of the installation part 122 passes through the installation hole 22, the plurality of elastic arms return to their original state, and the anti-detachment part is locked with the bottom of the load-bearing part 21, ensuring the stability of the clamping and fast installation. , easier to repair and replace.

In some embodiments, the outer diameter of the support body 11 is smaller than the inner ring diameter of the connection part 121 , and the two ends of the connection part 123 are respectively connected to the bottom side wall of the support body 11 and the inner side of the connection part 121 . In this embodiment, the connecting portion 121 is annular, the supporting body 11 is a truncated cone, the connecting piece 123 is in the shape of a sheet, and extends along the radial direction of the supporting body 11 , and the two ends of the connecting piece 123 are respectively connected to the bottom of the truncated cone. The side wall and the inner side of the connecting portion 121. Since the connecting pieces 123 are spaced apart and there is no support at the connecting parts, when the supporting body 11 is subjected to a downward impulse, it is easy to break at the weak connecting parts 123 . For example, when a pedestrian collides head-on with a vehicle, the buffer block 3 exerts an instantaneous impact force on the upper part of the first support body 1, and the large impact force causes it to break at the connecting piece 123, thereby absorbing energy and reducing the impact. Pedestrian injuries.

Specifically, in some embodiments, the number of connectors 123 may be 3-8, and they may be evenly arranged on the side walls of the support body 11. Preferably, the number may be 3, 4, 5, or 6. The uniform arrangement of the connecting pieces 124 makes the connection support of the supporting body 11 stable. In other embodiments, the number and shape of the connecting pieces 123 are not limited and can be set according to the connection strength requirements between the supporting body 11 and the connecting portion 121 .

Specifically, in some embodiments, the material of the first bracket body 1 is plastic, and the support body 11 and the mounting body 12 of the first bracket body 1 are integrally formed. Preferably, the first bracket body 1 can be integrally injection molded. Because of the brittleness of the plastic material, when the support body 11 is subjected to an impact force, the connecting piece 123 at its lower connection can break, thereby reducing part of the impact force through fracture deformation and reducing injuries to pedestrians.

Specifically, in some embodiments, the maximum diameter of the support body 11 is smaller than the diameter of the mounting hole 22. When the engine hood 4 is impacted, the connecting piece 123 breaks, and the support body 11 can move downward through the mounting hole 22. The maximum diameter of the support body 11 is smaller than the diameter of the mounting hole 22, so that the support body 11 can continue to move downward after the connecting piece 123 around it breaks. The moving distance further increases the collision time and effectively reduces the collision force.

Specifically, in some embodiments, the support strength of the material of the first stent body 1 is smaller than the support strength of the material of the second stent body 2. Preferably, the yield strength of the material of the second stent body 2 is greater than or equal to 295 MPa. In some embodiments, the second bracket body 2 is made of a metal material with a relatively high yield strength, such as alloy steel or high-strength steel. For example, the material of the second bracket body 2 can be high-strength steel such as dual-phase steel, complex-phase steel, phase transformation-induced plasticity steel, martensitic steel, quenching ductility steel, twin-induced plasticity steel or boron steel. 2. It can provide sufficient stiffness without deformation and ensure the normal opening and closing performance of the engine hood. The second bracket body 2 can be fixed on the body sheet metal through welding, riveting or fastener thread connection, etc., and the connection stability is good.

Specifically, in some embodiments, the second bracket body 2 can be a "ji"-shaped mounting piece, the bearing portion 21 is a middle plane with a raised top end of the second bracket body 2, and other parts of the "ji"-shaped mounting piece are in contact with other parts of the "ji"-shaped mounting piece. Component connection for fixing the second bracket body 2 to the vehicle body. The "J"-shaped mounting piece has better support strength and stability. The thickness of the mounting piece can be changed according to its strength requirements, application location and the needs of different models. Among them, the upwardly protruding middle plane of the mounting piece is the load-bearing part 21. The two bottom planes on both sides of the load-bearing part 21 are welded and connected to the body sheet metal, and the connection stability is good. In addition, by welding the bottom planes on both sides of the bearing portion 21 to the body sheet metal, and the structure in which the bearing portion 21 protrudes upward, a gap can be formed between the bearing portion 21 and the body sheet metal for the anti-separation portion of the mounting portion 122 to engage. space.

In this application, when the vehicle normally opens and closes the hood, the buffer block 3 exerts a small static pressure on the first bracket body 1. The combined structure of the first bracket body 2 and the second bracket body 2 can provide sufficient rigidity without deformation, ensuring that The normal switching performance of the engine hood will not affect the switching due to fatigue failure of the buffer block 3. When a vehicle collides, the connecting piece 123 of the first support body 1 can break and absorb energy, thereby reducing damage to pedestrians.

In this application, the first bracket body 1 is a plastic structure, and the second bracket body 2 is a high-strength steel part. The snap-in combination structure of plastic and high-strength steel uses the brittleness of plastic and the high strength of steel. When the vehicle collides, When the engine hood is subject to a large impact, the first bracket body 1 can absorb energy through fracture and absorb the collision energy. The second bracket body 2 can provide sufficient support strength without deformation, thus ensuring the support for the engine hood, so that The hood can be opened and closed normally.

In this application, the first bracket body and the second bracket body are combined together through snap connection, which is easy to replace and maintain.

This application uses reasonable materials, thicknesses, and structures to solve the performance requirements for parts under different extreme working conditions. By adjusting the materials and thickness of the split plastic parts and the main high-strength steel parts, it can be applied to the hood buffer blocks of different models in different positions. performance requirements and good stability.

The above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also regarded as the present invention. protection scope of the invention.

Claims (14)

1. An engine hood buffer block bracket, characterized in that it includes a breakable first bracket body (1) and a second bracket body (2). The first bracket body (1) is arranged on the engine hood (4). Below the buffer block (3) and connected with the second bracket body (2);

   The first bracket body (1) includes a support body (11) and an installation body (12). The installation body (12) includes a connection part (121) and an installation part (122). The support body (11) and The connecting portion (121) is connected through a plurality of breakable connecting pieces (123);

   The second bracket body (2) includes a bearing portion (21). The bearing portion (21) is provided with a mounting hole (22). The first bracket body (1) is connected to the mounting portion (122) through the mounting portion (122). The mounting hole (22) is matched with the second bracket body (2).
2. A hood buffer block bracket according to claim 1, characterized in that the connecting part (121) is surrounding the outside of the supporting body (11), and both ends of the connecting part (123) are respectively Connect the bottom side wall of the support body (11) and the inner side of the connecting portion (121).
3. A hood buffer block bracket according to claim 2, characterized in that the connecting part (121) is annular, the supporting body (11) is a cylindrical body or a truncated cone body, and the supporting body (11) The outer diameter is smaller than the inner ring diameter of the connecting part (121).
4. A hood buffer block bracket according to claim 2, characterized in that the number of the connecting pieces (123) is 3-8, and they are arranged at intervals along the circumferential direction on the supporting body (11). side walls.
5. A hood buffer block bracket according to claim 1, characterized in that the maximum diameter of the support body (11) is smaller than the diameter of the mounting hole (22). When the connecting piece (123) breaks, , the support body (11) can move downward through the mounting hole (22).
6. The hood buffer block bracket according to claim 1, characterized in that the number of the mounting parts (122) is at least two, and they are arranged at intervals below the connecting part (121).
7. A hood buffer block bracket according to claim 6, characterized in that the mounting part (122) is snap-fitted with the mounting hole (22).
8. A hood buffer block bracket according to claim 1, characterized in that the mounting part (122) includes an elastic arm extending downward from the connecting part (121) and a radial direction extending from the elastic arm. The anti-loosening part extends outward, and the elastic arm contracts inwardly when the anti-loosening part passes through the mounting hole (22). The second bracket body (2) is locked.
9. A hood buffer block bracket according to claim 1, characterized in that the support strength of the material of the first bracket body (1) is smaller than the support strength of the material of the second bracket body (2).
10. A hood buffer block bracket according to claim 9, characterized in that the first bracket body (1) is a plastic structure, and the second bracket body (2) is a steel structure.
11. A hood buffer block bracket according to claim 1, characterized in that the material of the first bracket body (1) is plastic, and the support body (11) of the first bracket body (1) It is integrally formed with the mounting body (12).
12. A hood buffer block bracket according to claim 1, characterized in that the yield strength of the material of the second bracket body (2) is greater than or equal to 295 MPa.
13. A hood buffer block bracket according to claim 1, characterized in that the second bracket body (2) is a "J"-shaped mounting piece, and the bearing portion (21) is the second bracket body. (2) The middle plane with raised top.
14. An engine hood buffer device, characterized by comprising an engine hood (4), a buffer block (3) and the hood buffer block bracket according to any one of claims 1-13, the buffer block (3) and the The engine hood (4) is connected, and the engine hood buffer block bracket is arranged below the buffer block (3).