Reinforcing structure for improving NVH performance of whole vehicle and vehicle

Abstract

The utility model provides a reinforcing structure for improving the NVH performance of a whole vehicle and the vehicle. The reinforcing structure comprises reinforcing supports, and the reinforcing supports are arranged at the two ends of the side, close to an oil tank, of a rear auxiliary frame; the reinforcing support is provided with a first connecting point, a second connecting point and a third connecting point, the first connecting point is connected with one end, close to one side of the oil tank, of the rear auxiliary frame, the second connecting point is connected with the doorsill beam, and the third connecting point is connected with the oil tank. The first connecting point, the second connecting point and the third connecting point are stably connected in a triangular mode. Therefore, the problem that the connection dynamic stiffness of the rear auxiliary frame and the vehicle body cannot be guaranteed due to the fact that the fuel tank is additionally arranged on a hybrid vehicle model is solved, the dynamic stiffness of the connection point of the rear auxiliary frame and the vehicle body under various frequencies is improved, and the side, close to the rear auxiliary frame, of the fuel tank is connected in a surrounding mode, so that vibration and noise in the fuel tank are isolated, and the service life of the fuel tank is prolonged. And the NVH performance of the whole vehicle is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of automobiles, and in particular to a reinforced structure and vehicle for improving the NVH performance of the whole vehicle. Background Technology

[0002] A vehicle can be divided into a body and a chassis. In automotive design and engineering, it is essential to consider not only the individual rigidity of the body and chassis but also the rigidity of the connection points between them. Generally, the connection between the chassis and the rear body relies on the flexible connection between the four bushings of the rear subframe and the body. The bushings of the rear subframe help filter vibrations caused by the road surface. The dynamic stiffness of the connection points between the chassis and the rear body must also be guaranteed. Dynamic stiffness refers to the stiffness performance of the connection points under dynamic forces. Achieving the required dynamic stiffness is a crucial condition for a vehicle to meet requirements for ride comfort, driving stability, and collision safety.

[0003] Modern automobiles are increasingly pursuing high-end and green features, placing higher demands on the overall vehicle experience. Therefore, NVH (Noise, Vibration, and Harshness) performance is becoming increasingly important. NVH performance refers to the level of noise, vibration, and roughness generated by a vehicle during operation. High-level NVH performance means a smoother ride. Increasing the dynamic stiffness of the chassis and rear body connection points helps reduce vibration transmission caused by road impacts and engine vibrations during driving, thereby reducing noise levels both inside and outside the vehicle. It also improves the sound quality of the vehicle, making the sound more delicate and pleasant, rather than harsh or abrupt. Optimizing dynamic stiffness can also improve the performance of the vehicle's suspension system, allowing it to better absorb the impact of uneven road surfaces and improve ride comfort. Therefore, the dynamic stiffness of the chassis and rear body connection points is a crucial factor directly related to the overall NVH performance of the vehicle.

[0004] Currently, electric vehicles use a single reinforcing plate to connect the rear subframe and battery pack, which meets the dynamic stiffness requirements of the chassis-body connection point. However, for hybrid vehicles, a fuel tank is added between the rear subframe and battery pack. In this case, the existing reinforcing plate cannot connect the rear subframe and battery pack, failing to guarantee the dynamic stiffness requirements of the chassis-body connection point, and thus failing to meet the overall vehicle NVH performance requirements. Therefore, a reinforcing structure and vehicle design are needed to improve the overall NVH performance. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a reinforced structure and vehicle for improving the NVH performance of the whole vehicle. The fuel tank and the rear subframe are connected by a reinforced bracket, and the reinforced bracket is connected to the door sill beam of the vehicle body, which solves the problem of not being able to guarantee the dynamic stiffness of the connection point between the vehicle body and the chassis, thereby improving the NVH performance of the whole vehicle.

[0006] To achieve the above and other related objectives, this utility model provides a reinforced structure for improving the NVH performance of a vehicle, comprising:

[0007] Strengthen the support;

[0008] The reinforcing bracket is provided with a first connection point, a second connection point, and a third connection point, which are arranged in a triangular pattern.

[0009] The first connection point is configured to connect to the end of the rear subframe near the fuel tank, the second connection point is configured to connect to the sill beam, and the third connection point is configured to connect to the fuel tank.

[0010] In a preferred embodiment of the present invention, the reinforcing bracket includes a first support plate and a second support plate, the first support plate and the second support plate are arranged at an obtuse angle, and the connection between the first support plate and the second support plate is the first connection point, the end of the first support plate away from the first connection point is the second connection point, and the end of the second support plate away from the first connection point is the third connection point.

[0011] In a preferred embodiment of the present invention, the second connection point is connected to the corresponding sill beam along the X-axis direction, and the third connection point is connected to the oil tank along the Y-axis direction.

[0012] In a preferred embodiment of this utility model, the second support plate has a negative angle flange on the side near the oil tank.

[0013] In a preferred embodiment of the present invention, the side of the first support plate near the oil tank is used to connect with the protective plate around the oil tank, and the other side of the first support plate is used to connect with the mudguard of the wheel.

[0014] In a preferred embodiment of this utility model, both the first support plate and the second support plate are provided with multiple mounting holes, and pipe clamps are fitted on the mounting holes for positioning and installing pipes and pipelines.

[0015] In a preferred embodiment of this utility model, the first support plate and the second support plate are provided with reinforcing ribs.

[0016] To achieve the above-mentioned objectives and other related objectives, this utility model provides a vehicle including the aforementioned reinforced structure for improving the overall NVH performance of the vehicle.

[0017] In a preferred embodiment of the present invention, the first connection point of the reinforcing structure is located at the lower end of the rear subframe and is connected to the vehicle body via a bushing. The bushing is fitted into the bushing mounting hole of the rear subframe.

[0018] In a preferred embodiment of this utility model, the reinforcing brackets of the reinforcing structure are symmetrically provided at both ends of the rear subframe near the fuel tank, and the axis of symmetry is the central axis of the rear subframe extending along the X-axis.

[0019] The technical advantages of this utility model are as follows:

[0020] This utility model discloses a reinforcing structure to improve the NVH performance of a vehicle. The reinforcing bracket includes a first connection point, a second connection point, and a third connection point arranged in a triangle. The first connection point connects to the end of the rear subframe near the fuel tank, the second connection point connects to the sill beam, and the third connection point connects to the fuel tank, forming a triangular connection structure. The aforementioned reinforcing brackets are arranged at both ends of the rear subframe near the fuel tank, forming a pair of triangular connection structures that significantly span the Y-axis direction of the vehicle. Based on the principle of triangle stability, this not only solves the problem of insufficient dynamic stiffness of the connection between the rear subframe and the body in hybrid vehicles due to the increased fuel tank placement, improving the dynamic stiffness of the connection point between the rear subframe and the body at various frequencies, but also provides a wraparound connection to the side of the fuel tank near the rear subframe, helping to isolate vibrations and noise within the fuel tank and improving the overall NVH performance of the vehicle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a reinforcing structure for improving the NVH performance of a vehicle, as shown in one embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the first reinforcing bracket and the second reinforcing bracket in one embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the installation of the reinforcing structure and the rear subframe in one embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the installation of the reinforcing structure and the fuel tank in one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram illustrating the installation of the reinforcing structure, guard plate, and mudguard in one embodiment of the present invention.

[0027] Among them, 10-first connection point; 20-second connection point; 30-third connection point; 1-first reinforcing bracket; 2-second reinforcing bracket; 11-first support plate; 12-second support plate; 121-negative angle flange; 13-middle section; 3-rear subframe; 31 bushing; 4-fuel tank; 41-protective plate; 51-mudguard. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model 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 this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0029] 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 illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In 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.

[0030] It should be noted that dynamic stiffness refers to the stiffness characteristics of a connection point under dynamic loads (such as unevenness and bumps on the road during driving). Ensuring that dynamic stiffness meets the standards not only helps to meet the requirements of ride comfort, driving stability, and collision safety, but is also crucial to the overall vehicle performance.

[0031] Ride comfort: An appropriate level of dynamic stiffness can maintain the stability inside the vehicle and reduce discomfort caused by vibration.

[0032] Driving stability: Good dynamic stiffness ensures vehicle handling and avoids body twisting or abnormal driving behavior caused by insufficient stiffness at connection points.

[0033] Collision safety: In the event of a collision, the dynamic stiffness of the connection points affects the deformation characteristics of the vehicle body structure, which directly relates to the safety of the occupants.

[0034] Meanwhile, a vehicle's NVH performance refers to the level of noise, vibration, and roughness generated during driving. High-level NVH performance means a smoother ride. Therefore, ensuring the dynamic stiffness of the connection points between the vehicle body and chassis can effectively improve the overall NVH performance of the vehicle.

[0035] Please see Figures 1-4As shown, this utility model provides a reinforcing structure to improve the NVH performance of a vehicle, including a reinforcing bracket. The reinforcing bracket has a first connection point 10, a second connection point 20, and a third connection point 30 arranged in a triangle. The first connection point 10 connects to the end of the rear subframe 3 near the fuel tank 4, the second connection point 20 connects to the sill beam, and the third connection point 30 connects to the fuel tank 4. Reinforcing brackets are arranged at both ends of the rear subframe 3 near the fuel tank 4, and can be designated as a first reinforcing bracket 1 and a second reinforcing bracket 2. The reinforcing bracket is made of stamped steel plate and is painted black.

[0036] It should be noted that the first connection point 10, the second connection point 20, and the third connection point 30 are arranged in a triangle. Based on the principle of the stability of triangles, the structure is optimized, which can greatly increase the connection rigidity with the sill beam, the rear subframe 3, and the fuel tank 4. Since the rear subframe 3 is part of the vehicle chassis and the sill beam is part of the vehicle body structure, the reinforcing structure of this utility model connects the vehicle body and the chassis as one unit. Moreover, the side of the fuel tank 4 that is close to the rear subframe 3 also helps to isolate the vibration and noise inside the fuel tank 4, thereby improving the NVH performance of the whole vehicle and reducing the transmission of noise and vibration during operation.

[0037] In a preferred embodiment of the present invention, the reinforcing bracket includes a first support plate 11 and a second support plate 12. The first support plate 11 and the second support plate 12 are arranged at an obtuse angle, and the connection between the first support plate 11 and the second support plate 12 is a first connection point 10. The end of the first support plate 11 away from the first connection point 10 is a second connection point 20, and the end of the second support plate 12 away from the first connection point 10 is a third connection point 30.

[0038] Furthermore, the first support plate 11 and the second support plate 12 are integrally connected by an intermediate section 13, which is the connection point of the first support plate 11 and the second support plate 12, namely the first connection point 10.

[0039] In a preferred embodiment of this utility model, the second connection point 20 is connected to the corresponding sill beam along the X-axis direction, and the third connection point 30 is connected to the oil tank 4 along the Y-axis direction.

[0040] It should be noted that the connection of the second connection point 20 along the X-axis to the sill beam can refer to multiple second connection points 20 spaced apart along the X-axis and connected to the sill beam; similarly, the connection of the third connection point 30 along the Y-axis to the oil tank 4 can refer to multiple third connection points 30 spaced apart along the Y-axis and connected to the oil tank 4. Connections along the X-axis and Y-axis provide better lateral and longitudinal stability, distribute loads more evenly, reduce local stress concentration, and thus improve the durability and reliability of the structure.

[0041] In a preferred embodiment of this utility model, the second support plate 12 is provided with a negative angle flange 121 on the side near the oil tank 4.

[0042] It should be noted that the rear-end collision poses a significant challenge to fuel tank 4. Therefore, it is crucial to ensure that fuel tank 4 does not leak during the collision to avoid a major safety accident. To this end, a negative angle flange 121 is added to the side near fuel tank 4 to protect its integrity.

[0043] Please see Figure 5 As shown, in a preferred embodiment of the present invention, the side of the first support plate 11 near the oil tank 4 is used to connect with the protective plate 41 around the oil tank 4, and the other side of the first support plate 11 is used to connect with the mudguard 51 of the wheel.

[0044] It should be noted that, in the layout of a range-extended hybrid system, the location of the fuel tank 4 varies depending on the vehicle model, but it is generally located at the rear of the vehicle, especially in the area of ​​the rear subframe 3 near the front of the vehicle. This layout can distribute the weight between the front and rear, improving vehicle stability and handling performance. The fuel tank 4 can be located near either the left or right side of the vehicle. When the fuel tank 4 is located near the right side, the first support plate 11 of the second reinforcing bracket 2 can be connected to the side of the fuel tank 4 closest to the fuel tank and the outer protective plate 41 of the fuel tank.

[0045] In a preferred embodiment of this utility model, the first support plate 11 and the second support plate 12 are each provided with a plurality of mounting holes, and pipe clamps are provided in the mounting holes for positioning and installing pipes and pipelines.

[0046] It should be noted that, compared to pure electric vehicles, range-extended vehicles require additional space between the battery pack and the rear subframe 3 to accommodate a fuel tank 4. This results in extremely limited routing for the high-voltage wiring harness, low-voltage wiring harness, and water pipes, which have to be routed around the sides. The irregular routing requires additional mounting points. The reinforcing structure of this invention provides integrated mounting points along the turning path, integrating the high-voltage wiring harness, low-voltage wiring harness, and water pipes onto the first reinforcing bracket 1 and the second reinforcing bracket 2. At the same time, the protective plate 41 around the fuel tank 4 and the mudguards 51 of the wheels are connected to the first reinforcing bracket 1 and the second reinforcing bracket 2, thereby achieving structural integration and overall vehicle weight reduction.

[0047] In a preferred embodiment of this invention, the first support plate 11 and the second support plate 12 are provided with reinforcing ribs to increase the strength of the structure.

[0048] To achieve the above-mentioned objectives and other related objectives, this utility model provides a vehicle including the aforementioned reinforced structure for improving the overall NVH performance of the vehicle.

[0049] In a preferred embodiment of the present invention, the first connection point 10 of the reinforcing structure is located at the lower end of the rear subframe 3 and is connected to the vehicle body via a bushing 31. The bushing 31 is fitted into the bushing mounting hole of the rear subframe 3.

[0050] It should be noted that the bushing 31 is fitted into the bushing mounting hole of the rear subframe 3. Bolts pass through the bushing 31 to connect the intermediate section 13 and the rear subframe 3 to the rear vehicle body. The bushing 31 can distribute the stress applied to the connection point, reduce stress concentration, thereby reducing the risk of fatigue damage at the connection point and improving the service life of the connecting parts. At the same time, the bushing 31 can filter vibrations caused by the road surface, preventing vibrations from being transmitted to the vehicle body and improving the vehicle's ride comfort. Moreover, the intermediate section 13 of the first reinforcing bracket 1 and the second reinforcing bracket 2 provides the lower limit position for the corresponding bushing 31.

[0051] Please see Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the rear subframe 3 is provided with symmetrical reinforcing brackets with reinforcing structures at both ends near the fuel tank 4, and can be configured as a first reinforcing bracket 1 and a second reinforcing bracket 2, and its axis of symmetry is the central axis of the rear subframe 3 extending along the X-axis direction.

[0052] It should be noted that the first reinforcing bracket 1 and the second reinforcing bracket 2 are symmetrically arranged to form a pair of triangular connection structures, which significantly connect the vehicle body and chassis across the Y-axis direction. This effectively disperses external loads and reduces torsional and bending deformation. It avoids localized deformation caused by asymmetrical forces, greatly improving the overall vehicle rigidity, i.e., NVH performance.

[0053] In summary, this utility model provides a reinforcing structure to improve the NVH performance of a vehicle. The reinforcing structure includes a reinforcing bracket, which comprises a first connection point 10, a second connection point 20, and a third connection point 30 arranged in a triangle. The first connection point 10 connects to the end of the rear subframe 3 near the fuel tank 4, the second connection point 20 connects to the sill beam, and the third connection point 30 connects to the fuel tank 4, forming a triangular connection structure. The aforementioned reinforcing brackets are arranged at both ends of the rear subframe 3 near the fuel tank 4, forming a pair of triangular connection structures that significantly span the Y-axis direction of the vehicle. Based on the principle of triangular stability, this not only solves the problem of insufficient dynamic stiffness in the connection between the rear subframe 3 and the vehicle body when adding a fuel tank in a hybrid vehicle, improving the dynamic stiffness of the connection point between the rear subframe 3 and the vehicle body at various frequencies, but also provides a surrounding connection to the side of the fuel tank 4 near the rear subframe 3, helping to isolate vibrations and noise within the fuel tank 3 and improving the overall NVH performance of the vehicle.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0055] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0056] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0057] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0058] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0059] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0060] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0061] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0062] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A reinforcing structure for improving the NVH performance of a vehicle, characterized in that, include: Strengthen the support; The reinforcing bracket is provided with a first connection point, a second connection point, and a third connection point, which are arranged in a triangular pattern. The first connection point is configured to connect to the end of the rear subframe near the fuel tank, the second connection point is configured to connect to the sill beam, and the third connection point is configured to connect to the fuel tank.

2. The reinforced structure for improving the NVH performance of a vehicle according to claim 1, characterized in that, The reinforcing bracket includes a first support plate and a second support plate, which are arranged at an obtuse angle. The connection between the first support plate and the second support plate is the first connection point, the end of the first support plate away from the first connection point is the second connection point, and the end of the second support plate away from the first connection point is the third connection point.

3. The reinforced structure for improving the NVH performance of the entire vehicle according to claim 2, characterized in that, The second connection point is connected to the corresponding sill beam along the X-axis, and the third connection point is connected to the oil tank along the Y-axis.

4. The reinforced structure for improving the NVH performance of the entire vehicle according to claim 3, characterized in that, The second support plate has a negative angle flange on the side near the oil tank.

5. The reinforced structure for improving the NVH performance of the entire vehicle according to claim 4, characterized in that, The side of the first support plate closest to the oil tank is used to connect with the protective plate around the oil tank, and the other side of the first support plate is used to connect with the mudguard of the wheel.

6. The reinforced structure for improving the NVH performance of the entire vehicle according to claim 5, characterized in that, Both the first support plate and the second support plate have multiple mounting holes, and pipe clamps are fitted into the mounting holes for positioning and installing pipes and pipelines.

7. The reinforced structure for improving the NVH performance of the entire vehicle according to claim 6, characterized in that, The first support plate and the second support plate are provided with reinforcing ribs.

8. A vehicle, characterized in that, Including the reinforced structure for improving the NVH performance of the whole vehicle as described in any one of claims 1 to 7.

9. A vehicle according to claim 8, characterized in that, The first connection point of the reinforcing structure is located at the lower end of the rear subframe and is connected to the vehicle body via a bushing. The bushing is fitted into the bushing mounting hole of the rear subframe.

10. A vehicle according to claim 9, characterized in that, The rear subframe has symmetrical reinforcing brackets at both ends near the fuel tank, and the axis of symmetry is the central axis of the rear subframe extending along the X-axis.

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