Front windshield lower cross beam reinforcing structure and automobile

Abstract

The utility model provides a front windshield lower cross beam reinforcing structure and an automobile. The front windshield lower cross beam reinforcing structure comprises a front wall plate, a front wall side plate, a front supporting piece and two connecting plates. The dash panel is arranged between the front windshield lower cross beam body and the automobile firewall, and the two connecting plates are arranged on the two sides of the dash panel respectively. A flat extension plate connected with the front wall side plate is arranged on the front wall plate, and an alignment plate attached to the flat extension plate is arranged at the lower end of the front supporting piece; and the two connecting plates are respectively connected with the two front wall side plates. The automobile comprises the front windshield lower cross beam reinforcing structure, the front windshield lower cross beam reinforcing structure and the front windshield lower cross beam reinforcing structure have the same beneficial effects, and the noise blocking capacity of an automobile firewall is improved by increasing the extension length of the front windshield lower cross beam body and increasing the noise blocking area of the front windshield lower cross beam body. According to the front windshield lower cross beam reinforcing structure and the automobile, the structural strength of the front windshield lower cross beam body can be enhanced, meanwhile, the noise blocking area is increased, and transmission of vibration noise excitation of an engine and a motor reducer to a cab is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile manufacturing, and particularly relates to a front windshield lower beam reinforcing structure and an automobile. BACKGROUND

[0002] The hybrid vehicle type will simultaneously generate engine and motor reducer vibration noise excitation during driving. This excitation is particularly obvious when the vehicle has low power (because the engine needs to charge the battery at this time, the power output is significantly increased, which further strengthens the engine vibration noise excitation). This vibration and noise not only transmits to the passenger compartment through the vehicle body structure, but also can cause resonance of the vehicle body parts, which seriously affects the driving and riding comfort. Therefore, how to effectively block the transmission of vibration and noise excitation has become a key problem to improve the NVH (noise, vibration and harshness) performance of the hybrid vehicle type.

[0003] At present, in order to block the transmission of vibration and noise excitation, the industry generally adopts the scheme of enhancing the strength and thickness of the automobile firewall on the lower side of the front windshield lower beam body. This design can absorb and disperse vibration energy to a certain extent by increasing the rigidity and mass of the firewall, thereby reducing the transmission of noise to the passenger compartment.

[0004] The inventors found that the scheme adopted in the prior art has obvious limitations. Specifically, increasing the strength and thickness of the firewall will increase the weight of the front part of the vehicle body, thereby affecting the lightweight design and fuel economy of the vehicle. In addition, the increase in material cost and the complexity of the manufacturing process also make this scheme face high economic and technical threshold in actual application. CONTENT OF THE UTILITY MODEL

[0005] The embodiment of the application provides a front windshield lower beam reinforcing structure and an automobile, which aims to enhance the structural strength of the front windshield lower beam body, and increase the blocking area of noise to reduce the transmission of vibration and noise excitation of the engine and motor reducer to the driver's cabin.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0007] A front windshield lower beam reinforcing structure is provided, which comprises a front wall panel arranged between a front windshield lower beam body and an automobile firewall, and two front wall side panels arranged on both sides of the front wall panel; the front wall panel has a flat extension panel extending towards the engine compartment, and both ends of the flat extension panel are connected to the two front wall side panels, respectively; the front windshield lower beam reinforcing structure further comprises:

[0008] a front support member arranged on the front side of the front wall panel, and having a positioning plate extending towards the front wall panel at the lower end, and the positioning plate is arranged in close contact with the flat extension panel; and

[0009] Two connecting plates are arranged at two ends of the front support and connected with the two front wall side plates respectively.

[0010] In a possible implementation, the front support has a protruding portion arranged towards the front wall plate, and the protruding portion is located at a position where the front support meets the alignment plate.

[0011] In a possible implementation, the upper side of the protruding portion has a plurality of raised portions, and each raised portion is located at a position where the protruding portion meets the front support.

[0012] In a possible implementation, the front support further comprises:

[0013] Two reinforcing plates are fixedly connected to the two automobile shock towers respectively, and each reinforcing plate is arranged in abutment with the lower side of the alignment plate.

[0014] In a possible implementation, each reinforcing plate has a plurality of upwardly extending flange portions, and each flange portion is arranged in abutment with the side of the front support facing away from the front wall plate.

[0015] In a possible implementation, the lower end of the connecting plate has a lower bent portion extending towards the front wall plate, the lower bent portion is between the alignment plate and the flat extension plate, and the upper and lower sides are in abutment with the alignment plate and the flat extension plate respectively.

[0016] In a possible implementation, the side of the connecting plate facing away from the front support has a side bent portion extending towards the front wall plate, and the side bent portion is in abutment with the inner side of the front wall side plate.

[0017] In a possible implementation, the upper end of the connecting plate has an upper bent portion extending away from the front wall plate; the upper end of the front support has a first abutting portion extending away from the front wall plate, and the first abutting portion is arranged in abutment with the upper bent portion.

[0018] In a possible implementation, the upper end of the front wall side plate has a second abutting portion extending towards the connecting plate, and the second abutting portion is arranged in abutment with the upper bent portion.

[0019] In the embodiments of the present application, the front wall plate reinforces the front windshield lower cross beam body and the automobile firewall, and the flat extension plate and the alignment plate are combined to extend the outer length of the front windshield lower cross beam body. On this basis, the front support, the connecting plate, and the front wall side plate cooperate with the front wall plate to form a support structure for the front windshield lower cross beam body, thereby ensuring the structural strength of the front windshield lower cross beam body.

[0020] Compared with the prior art, the front windshield lower cross beam reinforcing structure provided by the embodiment can enhance the structural strength of the front windshield lower cross beam body, and increase the noise blocking area, so as to reduce the transmission of the vibration noise excitation of the engine and the motor reducer to the cab.

[0021] The technical scheme adopted by the application further provides an automobile comprising the front windshield lower cross beam reinforcing structure according to any one of the preceding.

[0022] The automobile provided by the embodiment has the same beneficial effects as the front windshield lower cross beam reinforcing structure, that is, the transmission of the vibration noise excitation of the engine and the motor reducer to the cab is reduced, so as to improve the comfort in the cab. Meanwhile, considering the design cost of the whole vehicle, compared with the scheme of increasing the strength and thickness of the automobile firewall below the lower side of the front windshield lower cross beam body, the cost required for using the prefabricated additional structure is lower, which is beneficial to actual processing and manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor under these drawings.

[0024] Figure 1 The front windshield lower cross beam reinforcing structure provided by the embodiment of the application is shown in the perspective view;

[0025] Figure 2 The top view of the front windshield lower cross beam reinforcing structure is shown in the perspective view; Figure 1 The top view of the front windshield lower cross beam reinforcing structure is shown in the perspective view;

[0026] Figure 3 The sectional view structure along the A-A line in the front windshield lower cross beam reinforcing structure is shown in the perspective view; Figure 2 The sectional view structure along the A-A line in the front windshield lower cross beam reinforcing structure is shown in the perspective view;

[0027] Figure 4 The structure schematic diagram of the front windshield lower cross beam reinforcing structure provided by the embodiment of the application is shown in the perspective view;

[0028] Figure 5 The structure schematic diagram of the front windshield lower cross beam reinforcing structure provided by the embodiment of the application is shown in the perspective view;

[0029] Figure 6 The structure schematic diagram of the front windshield lower cross beam reinforcing structure provided by the embodiment of the application is shown in the perspective view; Figure 5 The structure schematic diagram of the front windshield lower cross beam reinforcing structure provided by the embodiment of the application is shown in the perspective view;

[0030] Figure 7 The structure schematic diagram of the front windshield lower cross beam reinforcing structure provided by the embodiment of the application is shown in the perspective view;

[0031] Figure 8Fig. 2 is a perspective view of a front support member used in the embodiment of the present application;

[0032] Figure 9 Fig. 4 is a perspective view of a reinforcing plate used in the embodiment of the present application;

[0033] Figure 10 Fig. 5 is a perspective view of a connecting plate used in the embodiment of the present application;

[0034] Reference signs: 1, front wall; 11, flat plate; 2, front wall side plate; 21, second butt joint part; 3, front support member; 31, alignment plate; 32, protruding part; 321, raised part; 33, first butt joint part; 4, connecting plate; 41, lower bending part; 42, side bending part; 43, upper bending part; 5, reinforcing plate; 51, flange part; 10, front windshield lower cross beam body; 20, automobile firewall; 30, automobile shock tower. DETAILED DESCRIPTION

[0035] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0039] It should be noted that in the present embodiment, the front windshield lower cross beam body 10 is a transverse support structure located below the front windshield of the vehicle, usually made of high-strength steel or aluminum alloy, mainly serving to support and reinforce the vehicle body. In actual use, the front windshield lower cross beam body 10 not only provides a mounting base for components such as the front windshield and instrument panel, but also absorbs impact force during a collision, improving the safety performance of the vehicle. In addition, the front windshield lower cross beam body 10 also has a sealing effect, which can prevent rainwater from entering the vehicle through the gap below the front windshield, while optimizing the aerodynamic design of the vehicle body, reducing wind resistance and noise.

[0040] The automobile firewall 20 is a partition between the engine compartment and the passenger compartment, usually made of metal or composite materials, mainly used to isolate the heat, noise and exhaust gas of the engine compartment, ensuring the comfort and safety of the passenger compartment. The automobile firewall 20 cooperates with the front windshield lower cross beam body 10 in the vehicle body structure, specifically: usually, the front windshield lower cross beam body 10 is located above the automobile firewall 20, and the two are connected by welding or bolts, forming a rigid support frame in the front part of the vehicle body. That is, the front windshield lower cross beam body 10 provides support for the upper part of the automobile firewall 20, while cooperating with the automobile firewall 20 to enhance the overall rigidity and anti-collision capability of the vehicle body. In a collision accident, the automobile firewall 20 and the front windshield lower cross beam body 10 share the impact force, preventing engine compartment components from invading the passenger compartment, further improving safety. Moreover, the cooperation of the automobile firewall 20 and the front windshield lower cross beam body 10 not only optimizes the vehicle body structure, but also provides a stable foundation for the installation of components such as the instrument panel and wiring harness, which is a crucial part of the vehicle body design.

[0041] In terms of engine compartment noise blocking, the automobile firewall 20 cooperates with the front windshield lower cross beam body 10, the automobile firewall 20 as the main sound insulation barrier between the engine compartment and the passenger compartment, designed with multiple layers of sound insulation materials, directly blocking engine noise and vibration; the front windshield lower cross beam body 10 is located above the automobile firewall 20, forming a continuous sealing structure with it, preventing noise from entering through the gap between the front windshield and the vehicle body, while enhancing the rigidity of the vehicle body and reducing vibration transmission. The two work together not only optimize the aerodynamic performance of the vehicle head, reduce wind noise, but also jointly build an efficient sound insulation system, significantly improving the quietness and comfort of the passenger compartment.

[0042] Please refer to Figures 1 to 10 , the front windshield lower cross beam reinforcing structure provided by the present application will be described. The front windshield lower cross beam reinforcing structure proposed in the present application includes a front wall panel 1, a front wall side panel 2, a front support 3 and two connecting plates 4.

[0043] The front wall 1 is arranged between the front windshield lower beam body 10 and the automobile firewall 20, and the upper and lower ends are fixedly connected with the front windshield lower beam body 10 and the automobile firewall 20 respectively, to form a plate body structure extending in the up-down direction. Specifically, the front wall 1 is a key vehicle body part located at the junction of the engine compartment and the passenger compartment, and is usually made of high-strength steel plate or composite material. The front wall 1 can connect the front windshield lower beam body 10 and the automobile firewall 20 to form a complete closed structure of the front part of the vehicle body, not only providing a mounting basis for the instrument panel, wire harness and other components, but also enhancing the rigidity of the vehicle body and supporting the front structure. The front wall 1 closely cooperates with the front windshield lower beam body 10 and the automobile firewall 20 to jointly bear the impact force and improve the safety performance of the vehicle.

[0044] In terms of isolating the propagation of cabin noise, the front wall 1 plays an important auxiliary role. As an upward extension of the automobile firewall 20, it forms a continuous soundproof barrier with the automobile firewall 20, which can effectively block the transmission of engine noise, exhaust sound and mechanical vibration to the passenger compartment.

[0045] In order to improve the noise blocking effect, the front wall 1 is usually covered with sound insulation material or damping layer to further absorb and weaken the propagation of noise. At the same time, its close connection with the front windshield lower beam body 10 prevents noise from entering through the gap, significantly improving the quietness of the passenger compartment and the comfort of the driving process.

[0046] Two front wall side plates 2 are arranged on the two sides of the front wall 1 towards the vehicle body Y direction, and the front wall side plate 2 serves to connect the automobile firewall 20 and the front wheel arch, and can form a lateral enclosure of the engine compartment.

[0047] It should be noted that the front wall side plate 2 is usually stamped from high-strength steel plate, which not only serves to support and reinforce the vehicle body, but also closely cooperates with the automobile firewall 20, the automobile shock tower 30 and the front windshield lower beam body 10 and other components to jointly enhance the rigidity and crashworthiness of the vehicle body. In addition, the front wall side plate 2 also bears the functions of isolating engine compartment noise, heat and road splash, and provides a mounting basis for the front fender, headlamp and other external coverings, and is an indispensable important component of the front part of the vehicle body structure.

[0048] The front wall 1 has a flat plate 11 extending towards the engine compartment side, which is integrally connected to the lower edge of the front wall 1 and is usually made of the same material as the front wall 1. The two ends of the flat plate 11 towards the vehicle body Y direction are connected with the two front wall side plates 2 on both sides respectively, so as to increase the contact area of the front wall 1 and the front wall side plate 2, and improve the structural strength of the combined structure of the front wall 1 and the front wall side plate 2.

[0049] The front support 3 is arranged on the front side of the front wall 1, the main body of which is parallel to the front side of the front wall 1, and is combined by two shells, which can significantly reduce the weight, thus meeting the lightweight design requirements, and helping to improve fuel economy and handling performance. The lower end of the front support 3 has a positioning plate 31 extending towards the front wall 1, which is attached to the upper side or lower side of the flat plate 11; in this embodiment, the positioning plate 31 is attached to the upper side of the flat plate 11.

[0050] In the above, the front support 3 is combined by two shells, so that the inside of the front support 3 has a hollow inner cavity; based on this, when the noise passes through the area where the front support 3 is located, the front support 3 has the ability to absorb and reduce noise, specifically: the inner cavity can form an acoustic barrier, which uses the reflection and refraction characteristics of sound waves between air and solid interfaces to block the propagation path of noise. The air layer in the cavity can be used as a medium with mismatched acoustic impedance to reduce the penetration of sound waves. Moreover, when designing the structure of the front support 3, the shape and size of the inner cavity can be adjusted to change the frequency characteristics of the sound waves, avoid resonance with the noise frequency, and thus reduce the amplification effect of the noise.

[0051] Based on the foregoing, in order to enhance the ability to absorb and reduce noise, the inner cavity can be filled with sound-absorbing materials (such as soundproof cotton, foam or fiber), which can convert sound wave energy into heat energy, thus effectively absorbing and attenuating noise.

[0052] In this embodiment, the front and rear widths of the combination of the positioning plate 31 and the flat plate 11 are about 230mm, which can effectively block the transmission of upper noise from the front windshield glass to the vehicle interior and increase the blocking area of noise transmitted from the engine and motor reducer to the cab based on the structure stability ensured by multiple experiments and calculations.

[0053] Two connecting plates 4 are arranged at the two ends of the front support 3 towards the vehicle body Y, and are connected to the two front wall side plates 2 respectively to form a combined structure extending along the vehicle body Y.

[0054] It should be noted that the front support 3 is combined with the front wall side plate 2 through two connecting plates 4, which is to improve the universality and stability of the structure. Specifically, when matching the front wall plate 1 with different widths, the distance between the two corresponding front wall side plates 2 is also different. At this time, only the two connecting plates 4 with different lengths need to be replaced, so as to retain the use of the main body (the front support 3). Since the lengths of the two connecting plates 4 are consistent, after combination, the center of the front support 3 and the center of the front wall plate 1 are aligned along the vehicle body X direction, so that the front support 3 and the front wall plate 1 jointly serve as the center support part and can collectively bear the main load, while the connecting plate 4 uniformly disperses the load to the entire structure through the connection with the front wall side plate 2. This design improves the overall rigidity and anti-deformation ability of the structure, and especially when subjected to external impact or vibration, it can effectively reduce the structural deformation.

[0055] Moreover, the use of the foregoing structure can also optimize the transmission path of vibration and noise. Specifically, the segmented design of the front support 3 and the connecting plate 4 can break the continuous transmission path of vibration and noise. The front support 3 as the center part can absorb and disperse part of the vibration energy, while the connecting plate 4 further blocks the transmission of vibration and noise to the front wall side plate 2 through flexible connection or the use of damping materials.

[0056] In the embodiment of the present application, the front wall plate 1 reinforces the front windshield lower beam body 10 and the automobile firewall 20, and simultaneously uses the structure combination of the flat extension plate 11 and the alignment plate 31 to achieve the technical effect of extending the outer extension length of the front windshield lower beam body 10. On this basis, the front support 3, the connecting plate 4, and the front wall side plate 2 cooperate with the front wall plate 1 to form a support structure for the front windshield lower beam body 10, thereby ensuring the structural strength of the front windshield lower beam body 10.

[0057] The front windshield lower beam reinforcing structure provided by the embodiment can enhance the structural strength of the front windshield lower beam body 10, and at the same time increase the noise blocking area to reduce the transmission of vibration and noise excitation of the engine and the motor reducer to the cab.

[0058] In some embodiments, as shown in Figure 8 The front support 3 has a protruding part 32 arranged towards the front wall plate 1, and the protruding part 32 is located at the position where the front support 3 meets the alignment plate 31.

[0059] By using the above technical solution, the structural design of the protruding part 32 can optimize the vibration and noise transmission path. Specifically,

[0060] Breaks continuous transmission path: The presence of the protrusion 32 changes the flatness of the front support 3 towards the side of the front wall 1, effectively breaking the continuous transmission path of vibration and noise. When vibration or sound waves are transmitted to the protrusion 32, part of the energy will be reflected or scattered, reducing the transmission to the back plate and other structures.

[0061] Increases acoustic impedance mismatch: The geometric change between the protrusion 32 and the front support 3 increases the acoustic impedance mismatch, making the sound waves encounter more interface reflection during transmission, further attenuating noise energy.

[0062] Disperses vibration energy: The protrusion 32 can disperse vibration energy in multiple directions, avoiding concentrated transmission of vibration to the front wall 1, thereby reducing overall vibration and noise levels.

[0063] In addition, the structural design of the protrusion 32 can also enhance the structural rigidity and stability, specifically:

[0064] Increases local stiffness: The protrusion 32 is equivalent to adding a reinforcing rib to the surface of the front support 3, which can significantly improve the local stiffness and bending strength of the front support 3, reducing the deformation of the front support 3 under external load.

[0065] Improves stress distribution: The design of the protrusion 32 can guide the stress distribution to be more uniform, avoiding stress concentration in certain areas, thereby reducing the risk of structural fatigue and damage.

[0066] Enhances overall stability: The combination of the protrusion 32 and the front support 3 can increase the connection strength between the front support 3 and the front support 3, making the entire frame structure more stable, especially when subjected to external impact or vibration, effectively maintaining the overall stability of the structure.

[0067] That is, by setting the protrusion 32 towards the front support 3 on the front support 3, not only can it optimize the control effect of vibration and noise by breaking the transmission path of vibration and noise, increasing acoustic impedance mismatch, and dispersing energy, but also can improve the rigidity and stability of the structure by increasing local stiffness, improving stress distribution, and enhancing connection strength. This design is an effective solution that takes into account both vibration and noise reduction and structural strength.

[0068] In some embodiments, as shown in Figure 8 the upper side of the protrusion 32 has several raised portions 321, and each raised portion 321 is located at the position where the protrusion 32 meets the front support 3. In this embodiment, the raised portion 321 has two, one of which is at the center of the protrusion 32, and the other is at the side of the protrusion 32 towards the vehicle body Y.

[0069] By adopting the above technical solutions, the setting of the raised portion 321 not only further optimizes the transmission path of vibration and noise, enhances the sound impedance mismatch and energy dispersion effect, but also significantly improves the local rigidity and overall stability of the structure. This design achieves more efficient vibration and noise reduction and structural reinforcement targets through multiple geometric reinforcement and optimization, and is a high-performance engineering solution.

[0070] In some embodiments, as shown in Figure 6 and Figure 9 The front support 3 also includes two reinforcing plates 5, which are fixedly connected to the two automobile shock towers 30 respectively, and each reinforcing plate 5 is arranged in close contact with the lower side of the alignment plate 31. Specifically, the connection position of the reinforcing plate 5 and the front support 3 is about one-fourth of the weak position of the two ends of the front support 3 towards the vehicle body Y, thereby playing a role in improving the strength of the weak position on both sides of the structure.

[0071] It should be noted that the automobile shock tower 30 is a support structure located on both sides of the front of the vehicle, mainly used for mounting and fixing the shock absorber of the front suspension system, and bearing the impact force and vibration from the wheels. The automobile shock tower 30 is closely related to the position of the front windshield lower beam body 10 and the automobile firewall 20: the automobile shock tower 30 is usually located below the two sides of the front windshield lower beam body 10, connected with the vehicle body frame by welding or bolts, forming a stable support network, which enhances the rigidity and torsional performance of the vehicle body together; at the same time, the rear part of the automobile shock tower 30 is adjacent to the automobile firewall 20, and the two are tightly connected through the vehicle body frame. The automobile firewall 20 not only provides additional support for the automobile shock tower 30, but also effectively blocks the vibration and noise transmitted by the automobile shock tower 30 from entering the passenger compartment. The automobile shock tower 30, the front windshield lower beam body 10 and the automobile firewall 20 work together to improve the handling stability and safety of the vehicle, and optimize the sound insulation and vibration reduction performance of the vehicle body. It is an indispensable important part of the front structure design of the vehicle body.

[0072] In some embodiments, as shown in Figure 6 and Figure 9 Each reinforcing plate 5 has a plurality of flange portions 51 extending upward, and each flange portion 51 is arranged in close contact with the side of the front support 3 away from the front wall 1, so as to increase the contact area of the reinforcing plate 5 and the front support 3, thereby improving the connection strength of the reinforcing plate 5 and the front support 3, and realizing the combination of two planes to facilitate welding or threaded connection.

[0073] In some embodiments, as shown in Figure 4 and Figure 10As shown, the lower end of the connecting plate 4 has a lower bending portion 41 extending towards the front wall 1, which is between the alignment plate 31 and the flat plate 11, and is attached to the alignment plate 31 and the flat plate 11 respectively to increase the structural strength of the connecting plate 4 and the front support 3, and the connecting plate 4 and the front wall 1. At the same time, the three-layer structure formed by the lower bending portion 41, the alignment plate 31 and the flat plate 11 can play a positive role in noise blocking based on the reflection, absorption and attenuation characteristics of sound waves in multi-layer media. Specifically, the three-layer structure formed by the lower bending portion 41, the alignment plate 31 and the flat plate 11 can form multiple reflections and scattering, and each layer can reflect and scatter sound waves, causing sound waves to repeatedly reflect and scatter between multiple layers, resulting in gradual attenuation of sound wave energy.

[0074] In other embodiments, the lower bending portion 41, the alignment plate 31 and the flat plate 11 are made of at least two different materials to form a sound wave reflection and impedance mismatch. That is, when sound waves propagate from one medium to another, if the acoustic impedance (the product of density and sound speed) of the two media differs greatly, the sound waves will be reflected at the interface. The aforementioned three-layer structure creates multiple impedance mismatch interfaces by using layers of different materials or different densities, causing the sound waves to be partially reflected at each interface, thereby reducing the penetration of sound waves.

[0075] In other embodiments, at least one component of the lower bending portion 41, the alignment plate 31 and the flat plate 11 is made of sound-absorbing material to achieve the technical purpose of sound wave absorption and energy dissipation. When sound waves pass through the three-layer structure, sound wave energy can be converted into heat energy, or when sound waves enter the sound-absorbing layer, sound waves repeatedly reflect and rub in the tiny pores inside the material, causing energy to gradually dissipate.

[0076] In some embodiments, as shown in Figure 4 and Figure 10 The side of the connecting plate 4 facing away from the front support 3 has a side bending portion 42 extending towards the front wall 1, which is attached to the inner side of the front side plate 2 to increase the contact area of the connecting plate 4 and the front side plate 2 and improve the connection strength between the connecting plate 4 and the front side plate 2. And form a surface-to-surface basis to facilitate welding or threaded connection.

[0077] It should be noted that the two-layer structure formed by the side bending portion 42 and the front side plate 2 can also play a positive role in noise blocking, and the principle is similar to the principle of the aforementioned three-layer structure, which will not be described here.

[0078] In some embodiments, as shown in Figure 4 and Figure 10As shown, the upper end of the connecting plate 4 has an upper bending portion 43 extending away from the front wall 1; the upper end of the front support 3 has a first abutting portion 33 extending away from the front wall 1, and the first abutting portion 33 is arranged in abutment with the upper bending portion 43 to increase the contact area of the connecting plate 4 and the front support 3 and improve the connection strength between the connecting plate 4 and the front support 3. Moreover, the surfaces are formed in abutment with each other to facilitate welding or threaded connection.

[0079] It needs to be supplemented that the two-layer structure formed by the upper bending portion 43 and the first abutting portion 33 can also play a positive role in noise blocking, and the principle is similar to the principle of the aforementioned three-layer structure, which will not be repeated here.

[0080] Among them, the lower bending portion 41 extends towards the front wall 1, and the upper bending portion 43 extends away from the front wall 1 to form a Z-shaped structure, which has stronger structural strength and extrusion resistance. At the same time, it can play a positive role in noise blocking, specifically:

[0081] The zigzag shape of the Z-shaped structure can lengthen the sound wave propagation path. When the sound wave propagates in the Z-shaped structure, it needs to bypass multiple corners, lengthening the sound wave propagation path, which causes the energy of the sound wave to gradually attenuate. At the same time, the multiple corners and interfaces of the Z-shaped structure provide more opportunities for reflection and scattering of sound waves, that is, increase the reflection and scattering of sound waves, thereby improving the sound insulation effect.

[0082] In some embodiments, as shown in Figure 8 and Figure 10 As shown, the upper end of the front wall side plate 2 has a second abutting portion 21 extending towards the connecting plate 4, and the second abutting portion 21 is arranged in abutment with the upper bending portion 43 to form a surface-to-surface contact, thereby facilitating welding and threaded connection, and realizing the fixed combination of the front wall side plate 2 and the upper bending portion 43.

[0083] Based on the same inventive concept, the embodiments of the present application also provide an automobile comprising the front windshield lower cross beam reinforcing structure according to any one of the preceding embodiments.

[0084] The automobile provided by the embodiments has the same beneficial effects as the front windshield lower cross beam reinforcing structure described above, specifically, the transmission of vibration and noise excitation of the engine and motor reducer to the cab is reduced, thereby improving the comfort in the cab. At the same time, considering the design cost of the whole vehicle, compared with the scheme of increasing the strength and thickness of the automobile firewall 20 on the lower side of the front windshield lower cross beam body 10, the cost required for using the prefabricated additional structure is lower, which is conducive to actual processing and manufacturing.

[0085] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A front windshield lower beam reinforcing structure, comprising a front apron (1) arranged between a front windshield lower beam body (10) and a firewall (20) of a vehicle, and two front apron side panels (2) arranged on both sides of the front apron (1); characterized in that, The front wall (1) has a flat extension plate (11) extending towards the cabin, both ends of the flat extension plate (11) are connected with two front wall side plates (2) respectively, and the front windshield lower beam reinforcing structure further comprises: A front support (3) is arranged on the front side of the front wall (1), and the lower end of the front support (3) has a positioning plate (31) extending towards the front wall (1), and the positioning plate (31) is arranged in close contact with the flat extension plate (11); and Two connecting plates (4) are arranged at both ends of the front support (3) respectively, and are connected with two front wall side plates (2) respectively.

2. The front windshield lower beam reinforcement structure of claim 1, wherein The front support (3) has a protruding portion (32) arranged towards the front wall (1), and the protruding portion (32) is located at the position where the front support (3) is connected with the positioning plate (31).

3. The front windshield lower beam reinforcement structure of claim 2, wherein The upper side of the protruding portion (32) has a plurality of raised portions (321), and each raised portion (321) is located at the position where the protruding portion (32) is connected with the front support (3).

4. The front windshield cross beam reinforcement structure of claim 1, wherein The front support (3) further comprises: Two reinforcing plates (5) are fixedly connected on two automobile shock towers (30) respectively, and each reinforcing plate (5) is arranged in close contact with the lower side of the positioning plate (31).

5. The front windshield cross beam reinforcing structure of claim 4, wherein Each reinforcing plate (5) has a plurality of turn-up portions (51) extending upwards, and each turn-up portion (51) is arranged in close contact with the side of the front support (3) away from the front wall (1).

6. The front windshield cross beam reinforcement structure of claim 1, wherein The lower end of the connecting plate (4) has a lower bending portion (41) extending towards the front wall (1), the lower bending portion (41) is between the positioning plate (31) and the flat extension plate (11), and the upper and lower sides are in close contact with the positioning plate (31) and the flat extension plate (11) respectively.

7. The front windshield cross beam reinforcement structure of claim 1, wherein The side of the connecting plate (4) away from the front support (3) has a side bending portion (42) extending towards the front wall (1), and the side bending portion (42) is in close contact with the inner side of the front wall side plate (2).

8. The front windshield cross beam reinforcement structure of claim 1, wherein The upper end of the connecting plate (4) has an upper bending portion (43) extending away from the front wall (1); the upper end of the front support (3) has a first butt joint portion (33) extending away from the front wall (1), and the first butt joint portion (33) is arranged in close contact with the upper bending portion (43).

9. The front windshield cross beam reinforcing structure of claim 8, wherein The upper end of the front wall side plate (2) has a second butt joint portion (21) extending towards the connecting plate (4), and the second butt joint portion (21) is arranged in close contact with the upper bending portion (43).

10. An automobile characterized by The front windshield lower beam reinforcing structure comprises the front windshield lower beam reinforcing structure according to any one of claims 1-9. The front windshield lower beam reinforcing structure comprises the front windshield lower beam reinforcing structure according to any one of claims 1-9.

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