Vehicle body front end structure and vehicle

Abstract

The application relates to the technical field of automobile bodies, and discloses a vehicle body front end structure and a vehicle, which comprises an engine compartment longitudinal beam, a fender mounting beam, a front wheel hub cover, a front end module and a headlamp bracket, a supporting beam is fixedly installed between the engine compartment longitudinal beam and the fender mounting beam, the supporting beam, the engine compartment longitudinal beam, the fender mounting beam and the front wheel hub cover form a first closed ring structure, and the supporting beam, the engine compartment longitudinal beam, the fender mounting beam, the front end module and the headlamp bracket form a second closed ring structure; the bottom of the engine compartment longitudinal beam is provided with a chassis front suspension, and the end of the supporting beam fixedly connected with the engine compartment longitudinal beam is opposite to a front mounting point of the chassis front suspension and the engine compartment longitudinal beam. The application can improve the structural strength and the crashworthiness of the vehicle front end structure, improve the overall stability of the engine compartment, and improve the NVH performance of the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile body, in particular to a vehicle body front end structure and a vehicle. BACKGROUND

[0002] With the development of the automobile industry, the intensification of competition within the automobile industry, and the increasing familiarity of consumers with automobiles, the requirements for automobile quality are also increasingly high; in particular, the demand for safety, comfort, and NVH performance is increasing. Workers in the automobile industry continuously research vehicle body structures, conduct structural design and simulation analysis, and strive to maximize the collision safety performance of the vehicle body, the NVH performance of the vehicle, while ensuring that the cost of the parts is controllable, the process is feasible, and the maintenance economy is ensured. In terms of NVH, from the power source, transmission path, and response, comfort and NVH performance are improved; in terms of collision safety, efforts are made to develop reasonable strategies, design the energy absorption zone and safety zone of the vehicle body, increase the transmission path of the collision force, and increase the active safety configuration to improve the collision performance of the vehicle and protect the safety of passengers and pedestrians.

[0003] To increase the crashworthiness of the front end of the vehicle body, the current common way is to set a crash beam at the front end of the vehicle body, and then set an energy absorption box at the front end of the vehicle body; for example, the patent with the authorization announcement number CN215883806U discloses a vehicle body front end collision energy absorption structure, which includes a front crash beam connected to the front end of the two side engine compartment front longitudinal beams, and a front engine compartment upper cross beam connected between the two side front wheel cover side beams. Among them, the front crash beam has an extension section extending to the outside of the engine compartment front longitudinal beam; the front engine compartment upper cross beam is located above the rear of the front crash beam and arches forward of the vehicle body. Moreover, the inner side of the front wheel cover side beam is provided with a front shock absorber seat, and a front engine compartment upper cross beam energy absorption box is arranged between the front engine compartment upper cross beam and the front shock absorber seat.

[0004] The vehicle body front end collision energy absorption structure described above sets a front engine compartment upper cross beam in a front arch structure, and sets a cross beam energy absorption box on the front engine compartment, which can improve the structural strength of the upper part of the front end of the vehicle body, and has good buffering effect, which helps to improve the collision protection performance of the upper part of the front end of the vehicle body; however, it only improves the collision protection performance of the front end of the vehicle, but still cannot improve the stiffness and strength of the engine compartment area, nor can it improve the overall stability of the engine compartment, and also cannot improve the NVH performance of the vehicle. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a vehicle body front end structure and a vehicle, which can improve the overall stability of the engine compartment and improve the NVH performance of the vehicle while improving the structural strength and crashworthiness of the front end structure of the vehicle.

[0006] The present application solves the above technical problems through the following technical means:

[0007] The first aspect of the present application discloses a vehicle body front end structure, comprising a cabin longitudinal beam, a fender mounting beam, a front hub cover, a front end module and a headlamp bracket, a support beam is fixedly installed between the cabin longitudinal beam and the fender mounting beam, the support beam forms a first closed ring structure with the cabin longitudinal beam, the fender mounting beam and the front hub cover, and the support beam forms a second closed ring structure with the cabin longitudinal beam, the fender mounting beam, the front end module and the headlamp bracket.

[0008] In the technical solution, the support beam forms a first closed ring structure with the cabin longitudinal beam, the fender mounting beam and the front hub cover, and the support beam forms a second closed ring structure with the cabin longitudinal beam, the fender mounting beam, the front end module and the headlamp bracket, so that the front end structure of the vehicle body forms two closed ring structures, thereby strengthening the stability and strength of the front cabin structure; in the event of a frontal collision or a side collision, firstly, the stability of the deformation of the front part of the vehicle body is improved, secondly, the collapse deformation of the cabin longitudinal beam is improved, and thirdly, the collision force is smoothly conducted, dispersed and absorbed along the first path of the front collision cross beam, the front end module and the cabin longitudinal beam, and along the second path of the front collision cross beam, the front end module, the headlamp bracket and the fender mounting beam. Furthermore, the support beam is arranged to increase the crashworthiness of the front part of the vehicle body and improve the modal of the front cabin of the vehicle body, thereby avoiding the resonance of external excitation and the vehicle body and improving the control of NVH.

[0009] Further, the bottom of the cabin longitudinal beam is provided with a front suspension of a chassis, and the end of the support beam fixedly connected with the cabin longitudinal beam is opposite to the front mounting point of the front suspension of the chassis. The support beam improves the dynamic stiffness of the attachment point of the front suspension of the chassis and the cabin longitudinal beam, thereby reducing the conduction of vibration and noise and improving the control of NVH of the vehicle.

[0010] Further, the vehicle body front end structure further comprises a wheel cover lining plate, an insurance box and a front headlamp, and the support beam is located between the lining plate and the insurance box in the vertical direction and is located between the front headlamp and the front hub cover in the horizontal direction. Through the arrangement of the support beam, the support beam does not need to occupy extra space, so that the whole structure is more compact.

[0011] Further, the support beam is arranged in a diagonal straight line between the cabin longitudinal beam and the fender mounting beam. The support beam is arranged in a diagonal straight line between the cabin longitudinal beam and the fender mounting beam, thereby improving the structural stability of the first closed ring structure and the second closed ring structure.

[0012] Further, the support beam is provided with a through rib penetrating through the whole support beam in the longitudinal direction, and the cross section of the support beam is in the shape of a Chinese character 'z'. The arrangement of the support beam in this way can increase the strength and rigidity and bending stiffness of the support beam, and on the basis of meeting the strength and rigidity and bending stiffness, the weight of the support beam can also be reduced.

[0013] Further, the support beam is provided with a flange edge at both ends, the flange edge is provided with a first through hole, the fender mounting beam is provided with a second through hole matched with the first through hole, a welding nut is fixedly installed at the second through hole, a bolt is arranged between the first through hole and the second through hole, and the bolt is threadedly connected with the welding nut; the nacelle longitudinal beam is provided with a third through hole matched with the first through hole, a pull rivet nut is fixedly installed at the third through hole, and a bolt is arranged between the first through hole and the third through hole, and the bolt is threadedly connected with the pull rivet nut. Through the arrangement of the flange edge, the rigidity and strength of the connection point position of the support beam, the nacelle longitudinal beam and the fender mounting beam are better, and through the fixed connection of the bolt and the welding nut and the pull rivet nut, if a collision occurs, the post-collision maintenance is quick and economical, and the interchangeability is better.

[0014] Further, the support beam is made of a cold-rolled low-carbon steel plate material and is formed by a cold forming process. In the technical solution, the support beam is made of a cold-rolled low-carbon steel plate, the material strength and drawing rate are moderate, the price is relatively low, the support beam is formed by a cold forming process, the process is mature, the cost is controllable, and the efficiency is high.

[0015] In a second aspect, the application further discloses a vehicle, which comprises a vehicle body and the vehicle body front end structure.

[0016] The vehicle body front end structure and the vehicle have the following advantages:

[0017] 1. The support beam, the nacelle longitudinal beam, the fender mounting beam and the front wheel hub form a first closed ring structure, and the support beam, the nacelle longitudinal beam, the fender mounting beam, the front end module and the headlamp bracket form a second closed ring structure, so that the front end structure of the vehicle body forms two closed ring structures, the stability and strength of the front part of the nacelle are strengthened, the stability of the deformation of the front part of the vehicle body is beneficial when a frontal collision or a side collision occurs, the collapse deformation of the nacelle longitudinal beam is beneficial to energy absorption, and the collision energy is beneficial to being smoothly conducted, dispersed and absorbed along a first path of the front collision cross beam, the front end module and the nacelle longitudinal beam, and a second path of the front collision cross beam, the front end module, the headlamp bracket and the fender mounting beam.

[0018] 2. This invention increases the front collision resistance of the vehicle body by setting a support beam between the engine compartment longitudinal beam and the fender mounting beam, while also improving the modal characteristics of the front engine compartment. This avoids resonance between external excitation and the vehicle body, further improving the vehicle's safety and NVH performance, ultimately enhancing the overall vehicle quality, meeting user needs, satisfying layout requirements, and having good manufacturability, thus meeting engineering manufacturing needs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a vehicle front end structure according to the present invention;

[0020] Figure 2 This is a schematic diagram of the first closed ring structure in this invention;

[0021] Figure 3 This is a schematic diagram of the second closed ring structure in this invention;

[0022] Figure 4 This is a schematic diagram illustrating the role of the support beam in collision transmission in this invention;

[0023] Figure 5 yes Figure 1 Structural schematic diagram of the central support beam, engine compartment longitudinal beams, and chassis front suspension;

[0024] Figure 6 yes Figure 1 Schematic diagram of the central support beam;

[0025] Figure 7 yes Figure 1 Schematic diagram of the assembly relationship of the central support beam.

[0026] In the diagram: 1. Support beam, 2. Cabin longitudinal beam, 3. Fender mounting beam, 4. Wheel arch liner, 5. Fuse box, 6. Headlight, 7. Front wheel hub, 8. Front module, 9. Headlight bracket, 10. Front bumper beam, 11. Chassis front suspension, 12. Front mounting point, 13. Through rib, 14. Flange edge, 15. Welding nut, 16. Hexagonal flange bolt, 17. Rivet nut. Detailed Implementation

[0027] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] Example 1

[0030] This embodiment is a front-end structure of a vehicle body, such as... Figure 1 As shown, the structure includes a nacelle longitudinal beam 2, a fender mounting beam 3, a wheel arch liner 4, a fuse box 5, a headlight 6, a front wheel hub 7, a front end module 8, and a headlight bracket 9. A support beam 1 is fixedly installed between the nacelle longitudinal beam 2 and the fender mounting beam 3. To make the overall nacelle structure more compact, the support beam 1 is located vertically between the wheel arch liner and the fuse box 5, and horizontally between the headlight 6 and the front wheel hub 7. Furthermore, the support beam 1 is arranged diagonally in a straight line between the nacelle longitudinal beam 2 and the fender mounting beam 3. Figure 2 As shown, in this embodiment, the support beam 1, the nacelle longitudinal beam 2, the fender mounting beam 3, and the front wheel hub 7 form a first closed ring structure; as Figure 3 As shown, the support beam 1, together with the cabin longitudinal beam 2, the fender mounting beam 3, the front module 8, and the headlight bracket 9, forms a second closed ring structure. Figure 5 As shown, the bottom of the nacelle longitudinal beam 2 is fixedly installed with the chassis front suspension 11, and one end of the support beam 1 that is fixedly connected to the nacelle longitudinal beam 2 is directly opposite the front mounting point 12 of the chassis front suspension 11 and the nacelle longitudinal beam 2.

[0031] like Figure 6 and Figure 7 As shown, in this embodiment, both ends of the support beam 1 are provided with flange edges 14, and the flange edges 14 are provided with first through holes. The fender mounting beam 3 is provided with a second through hole that matches the first through hole. A welding nut 15 is fixedly installed at the second through hole. A hexagonal flange bolt 16 is provided between the first through hole and the second through hole. The hexagonal flange bolt 16 is threadedly connected to the welding nut. The engine room longitudinal beam 2 is provided with a third through hole that matches the first through hole. A rivet nut 17 is fixedly installed at the third through hole. A hexagonal flange bolt 16 is also provided between the first through hole and the third through hole. The hexagonal flange bolt 16 is threadedly connected to the rivet nut 17.

[0032] In this embodiment, the support beam 1 is made of cold-rolled low-carbon steel plate and formed using a cold forming process. The support beam 1 has a through-rib 13 running longitudinally through the entire beam, and its cross-section is shaped like a "Z". This configuration increases the strength, stiffness, and bending stiffness of the support beam 1, while also reducing its weight.

[0033] The front end structure of the vehicle body of the embodiment forms two closed loop structures by fixing and installing the diagonal straight support beam 1 between the engine compartment longitudinal beam 2 and the fender mounting beam 3, forming a first closed loop structure with the support beam 1, the engine compartment longitudinal beam 2, the fender mounting beam 3 and the front hub cover 7, and forming a second closed loop structure with the support beam 1, the engine compartment longitudinal beam 2, the fender mounting beam 3, the front end module 8 and the headlamp bracket 9, thereby strengthening the stability and strength of the front end structure of the vehicle body. Figure 4 As shown, in the case of a head-on collision or a side collision, the stability of the deformation of the front end of the vehicle body is improved, the collapse deformation of the engine compartment longitudinal beam 2 is absorbed, and the collision energy is smoothly conducted, dispersed and absorbed along the first path of the front impact beam 10, the front end module 8 and the engine compartment longitudinal beam 2, and along the second path of the front impact beam 10, the front end module 8, the headlamp bracket 9 and the fender mounting beam 3.

[0034] In addition, the support beam 1 is fixed and installed between the engine compartment longitudinal beam 2 and the fender mounting beam 3, and the end of the support beam 1 fixedly connected with the engine compartment longitudinal beam 2 is opposite to the front mounting point 12 of the chassis front suspension 11 and the engine compartment longitudinal beam 2. While increasing the crashworthiness of the front end of the vehicle body, the modal of the front end engine compartment of the vehicle body is also improved, the resonance of external excitation and the vehicle body is avoided, the safety performance and the NVH performance of the vehicle body are further improved, the overall quality of the vehicle is ultimately improved, the user's demand is met, the layout demand is met, the process is good, and the demand of engineering manufacturing is met.

[0035] In addition, the support beam 1 is fixedly connected with the bolt, the welding nut 15 and the pull rivet nut 17. If a collision occurs, the post-collision repair is quick and economical, and the interchangeability is better.

[0036] Embodiment 2,

[0037] The embodiment discloses a vehicle, which comprises a vehicle body and the front end structure of the vehicle body of the above-mentioned embodiment 1. The front end structure of such a vehicle not only has high structural strength and good crashworthiness, but also has better overall stability of the engine compartment, and the NVH performance of the vehicle is better improved.

[0038] The above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, which should be covered in the scope of the claims of the present application. The technical, shape and structure parts not described in detail in the present application are well-known technologies.

Claims

1. A front-end structure for a vehicle body, comprising engine compartment longitudinal beams, fender mounting beams, front wheel hubcaps, a front-end module, and headlight brackets, characterized in that: A support beam is fixedly installed between the nacelle longitudinal beam and the fender mounting beam. The support beam, together with the nacelle longitudinal beam, the fender mounting beam, and the front wheel hub, forms a first closed ring structure. The support beam, together with the nacelle longitudinal beam, the fender mounting beam, the front end module, and the headlight bracket, forms a second closed ring structure. A chassis front suspension is provided at the bottom of the nacelle longitudinal beam. One end of the support beam that is fixedly connected to the nacelle longitudinal beam is directly opposite the front mounting point of the chassis front suspension and the nacelle longitudinal beam.

2. The vehicle front end structure according to claim 1, characterized in that: The front end structure of the vehicle body also includes wheel arch liner, fuse box and headlights. The support beam is located between the wheel arch liner and the fuse box in the vertical direction, and between the headlights and the front wheel arch in the horizontal direction.

3. The vehicle front end structure according to claim 2, characterized in that: The support beam is arranged in a diagonal straight line between the cabin longitudinal beam and the fender mounting beam.

4. The vehicle front end structure according to claim 1, characterized in that: The support beam has a through-rib running through the entire support beam in the longitudinal direction, and the cross-section of the support beam is shaped like a "Z".

5. A vehicle front end structure according to claim 1, characterized in that: Both ends of the support beam are provided with flange edges, and the flange edges are provided with first through holes. The fender mounting beam is provided with a second through hole that matches the first through hole. A welding nut is fixedly installed at the second through hole. A bolt is provided between the first through hole and the second through hole, and the bolt is threadedly connected to the welding nut. The nacelle longitudinal beam is provided with a third through hole that matches the first through hole. A rivet nut is fixedly installed at each of the third through holes. A bolt is provided between the first through hole and the third through hole, and the bolt is threadedly connected to the rivet nut.

6. The vehicle front end structure according to claim 1, characterized in that: The support beam is made of cold-rolled low-carbon steel plate and formed using a cold forming process.

7. A vehicle, characterized in that: The vehicle includes a vehicle body and a front-end body structure as described in any one of claims 1-6.

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