Vehicle

Abstract

The utility model discloses a vehicle which comprises a vehicle body, an auxiliary frame and a reinforcing plate, the auxiliary frame is provided with a plurality of installation parts, and each installation part is connected with the vehicle body through a vibration reduction structure; the reinforcing plate is provided with a first connecting part and a second connecting part, the first connecting part abuts against the upper surface of the mounting part and is connected with the vibration reduction structure, and the second connecting part is connected with the vehicle body. According to the vehicle provided by the embodiment of the utility model, the first connecting part abuts against the upper surface of the mounting part and is connected with the vibration reduction structure, and the second connecting part is connected with the vehicle body, so that the dynamic stiffness at the mounting point of the auxiliary frame and the vehicle body can be increased, namely, the dynamic stiffness of the passive side is increased, and the vibration reduction effect can be improved without reducing the dynamic stiffness of the vibration reduction structure. The vibration isolation rate of the auxiliary frame and the installation point of the vehicle body is increased, and therefore the NVH road noise performance of the vehicle can be improved on the premise that the vehicle control performance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to a vehicle. Background Art

[0002] When a vehicle is driving on the road, due to the unevenness of the road surface, the vibration excited by the road surface is transmitted through the tires to the subframe, then to the body-in-white, and finally to the passenger compartment, causing the passengers to hear noise. Therefore, improving the vibration isolation rate from the subframe to the body-in-white structure can effectively reduce noise. Vibration isolation rate = passive lateral dynamic stiffness (body-in-white mounting point dynamic stiffness) / active lateral dynamic stiffness (vibration damping structure dynamic stiffness). In related technologies, the purpose of increasing the vibration isolation rate is usually achieved by reducing the active lateral dynamic stiffness, that is, reducing the stiffness of the vibration damping structure. However, the reduction in the stiffness of the vibration damping structure will lead to a deterioration in the vehicle's handling performance. Therefore, there is room for improvement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a vehicle, comprising a vehicle body, a subframe and a reinforcement plate, the reinforcement plate having a first connection portion and a second connection portion, wherein the first connection portion abuts against the upper surface of the mounting portion and is connected to the vibration damping structure, and the second connection portion is connected to the vehicle body, thereby increasing the dynamic stiffness of the subframe at the mounting point on the vehicle body, that is, increasing the dynamic stiffness of the passive side, thereby improving the vibration isolation rate at the mounting point on the subframe and the vehicle body without reducing the dynamic stiffness of the vibration damping structure, thereby improving the NVH road noise performance of the vehicle while ensuring the vehicle's handling performance.

[0004] According to an embodiment of the first aspect of the present utility model, the vehicle includes: a vehicle body; a subframe, the subframe having a plurality of mounting portions, each of the mounting portions being connected to the vehicle body via a vibration-damping structure; and a reinforcing plate, the reinforcing plate having a first connecting portion and a second connecting portion, the first connecting portion resting against an upper surface of the mounting portion and connected to the vibration-damping structure, and the second connecting portion being connected to the vehicle body.

[0005] According to the vehicle of the embodiment of the present invention, by making the first connecting portion abut against the upper surface of the mounting portion and connected to the vibration damping structure, and the second connecting portion connected to the vehicle body, the dynamic stiffness at the mounting point of the subframe and the vehicle body can be increased, that is, the dynamic stiffness of the passive side is increased, thereby improving the vibration isolation rate at the mounting point of the subframe and the vehicle body without reducing the dynamic stiffness of the vibration damping structure, thereby improving the NVH road noise performance of the vehicle while ensuring the vehicle handling performance.

[0006] According to some embodiments of the present invention, a single reinforcing plate includes multiple second connecting parts, and the second connecting part of each reinforcing plate is connected to the corresponding first connecting part through a connecting arm, and the multiple connecting arms of each reinforcing plate are arranged at intervals along the circumference of the first connecting part.

[0007] According to some embodiments of the present invention, at least some of the connecting arms in the same reinforcing plate are arranged at an angle to each other.

[0008] According to some embodiments of the present invention, part of the connecting arms in a single reinforcing plate extends along the X direction and part of the connecting arms extends along the Y direction.

[0009] According to some embodiments of the present invention, the connecting arm is provided with a reinforcing rib.

[0010] According to some embodiments of the present invention, part of the second connection portion of the single reinforcement plate is connected to the center floor of the vehicle body, and part of the second connection portion is connected to the rocker beam of the vehicle body.

[0011] According to some embodiments of the present invention, the first connection portion is connected to the vibration damping structure via a first fastener, and the second connection portion is connected to the vehicle body via a second fastener.

[0012] According to some embodiments of the present invention, the vibration damping structure includes a vibration damping block, a receiving hole is formed in the mounting portion, the vibration damping block is arranged in the receiving hole and fixed to the mounting portion, and a first fastener is passed through the first connecting portion, the vibration damping block and the vehicle body to connect the first connecting portion, the mounting portion and the vehicle body.

[0013] According to some embodiments of the present invention, the thickness of the reinforcement plate ranges from 1.2 mm to 4.5 mm.

[0014] According to some embodiments of the present invention, the reinforcing plate is a steel plate, an aluminum alloy plate, an aluminum plate, or a carbon fiber plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a partial structural schematic diagram of a vehicle according to some embodiments of the present utility model;

[0018] Figure 2 yes Figure 1 Assembly drawing of the center reinforcement plate and subframe;

[0019] Figure 3 yes Figure 1 Assembly drawing of the middle reinforcement plate and fasteners;

[0020] Figure 4 yes Figure 1 Schematic diagram of the middle reinforcement plate.

[0021] Figure 5 These are the results of the X-direction dynamic stiffness test and the Y-direction dynamic stiffness test performed on Example 1 and the comparative example.

[0022] Reference numerals:

[0023] 100. Vehicles;

[0024] 10. Body; 11. Center floor; 12. Door sill beam;

[0025] 20. Subframe; 21. Mounting portion; 22. Receiving hole;

[0026] 30. Reinforcement plate; 31. First connecting portion; 32. Second connecting portion; 33. Connecting arm; 34. Reinforcement rib; 35. First fastener; 36. Second fastener;

[0027] 40. Vibration-damping structure; 41. Vibration-damping block. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] Reference below Figure 1-Figure 5 A vehicle according to an embodiment of the present invention is described.

[0030] The vehicle 100 according to the embodiment of the first aspect of the present invention includes: a vehicle body 10 , a subframe 20 and a reinforcement plate 30 , wherein the subframe 20 may be a rear subframe 20 of the vehicle 100 .

[0031] Reference Figure 1The subframe 20 has a plurality of mounting portions 21, each of which is connected to the vehicle body 10 via a vibration damping structure 40. For example, the subframe 20 may have four mounting portions 21, and the vibration damping structure 40 may include four vibration damping blocks 41. The mounting portions 21 are cylindrical and include receiving holes 22. The vibration damping blocks 41 are cylindrical and are inserted into the receiving holes 22 of the four mounting portions 21, respectively.

[0032] Optionally, the vibration damping block 41 may be a rubber member, and the vibration damping block 41 is integrally formed on the mounting portion 21 through a vulcanization process.

[0033] The reinforcement plate 30 has a first connection portion 31 and a second connection portion 32. The first connection portion 31 abuts against the upper surface of the mounting portion 21 and is connected to the vibration damping structure 40, while the second connection portion 32 is connected to the vehicle body 10. By having the first connection portion 31 abut against the upper surface of the mounting portion 21 and connected to the vibration damping structure 40, and the second connection portion 32 connected to the vehicle body 10, the reinforcement plate 30 can reinforce the mounting point between the subframe 20 and the vehicle body 10, thereby increasing the dynamic stiffness of the subframe 20 mounting point, that is, increasing the dynamic stiffness on the passive side. This improves the vibration isolation rate at the mounting point between the subframe 20 and the vehicle body 10 without reducing the dynamic stiffness of the vibration damping structure 40. This improves the NVH (Non-Volatile, Harmful, and Vibration-Resistant) performance of the vehicle 100 while maintaining the handling performance of the vehicle 100.

[0034] Optionally, the vehicle 100 may include a plurality of reinforcing plates 30. For example, the vehicle 100 may include two reinforcing plates 30, which are spaced apart along the Y direction.

[0035] According to the vehicle 100 of the embodiment of the present utility model, by making the first connecting portion 31 abut against the upper surface of the mounting portion 21 and connected to the vibration damping structure 40, and the second connecting portion 32 connected to the vehicle body 10, the dynamic stiffness at the mounting point of the subframe 20 and the vehicle body 10 can be increased, that is, the dynamic stiffness of the passive side is increased, thereby improving the vibration isolation rate at the mounting point of the subframe 20 and the vehicle body 10 without reducing the dynamic stiffness of the vibration damping structure 40, thereby improving the NVH road noise performance of the vehicle 100 while ensuring the handling performance of the vehicle 100.

[0036] According to some embodiments of the present invention, referring to Figure 2A single reinforcement plate 30 includes multiple second connecting portions 32. Each second connecting portion 32 of the reinforcement plate 30 is connected to the corresponding first connecting portion 31 via a connecting arm 33. The number of connecting arms 33 is the same as the number of second connecting portions 32 and corresponds one-to-one. The multiple connecting arms 33 of each reinforcement plate 30 are arranged at intervals along the circumference of the first connecting portion 31. For example, a single reinforcement plate 30 may include two, three, or four second connecting portions 32. By including multiple second connecting portions 32 in a single reinforcement plate 30, the connection between the reinforcement plate 30 and the vehicle body 10 is further tightened. By connecting each second connecting portion 32 of the reinforcement plate 30 to the corresponding first connecting portion 31 via a connecting arm 33, the dynamic stiffness of the subframe 20 mounting point is further enhanced.

[0037] According to some embodiments of the present invention, referring to Figure 2 At least some of the connecting arms 33 in the same reinforcement plate 30 are arranged at an angle to each other. By arranging at least some of the connecting arms 33 in the same reinforcement plate 30 at an angle to each other, the reinforcement plate 30 can reinforce the mounting point of the subframe 20 in multiple directions, achieving a better reinforcement effect and enhancing the dynamic stiffness of the mounting point of the subframe 20.

[0038] According to some embodiments of the present invention, referring to Figure 2 Part of the connecting arm 33 in the single reinforcing plate 30 extends along the X direction, and part of the connecting arm 33 extends along the Y direction. By extending part of the connecting arm 33 in the single reinforcing plate 30 along the X direction and part of the connecting arm 33 along the Y direction, the connecting arm 33 in the single reinforcing plate 30 can fully strengthen the dynamic stiffness of the sub-frame 20 mounting point in both the X direction and the Y direction.

[0039] According to some embodiments of the present invention, referring to Figure 3-Figure 4 , a reinforcing rib 34 is provided on the connecting arm 33. By providing the reinforcing rib 34 on the connecting arm 33, the strength of the connecting arm 33 can be increased and the risk of the connecting arm 33 bending or breaking can be reduced.

[0040] According to some embodiments of the present invention, referring to Figure 1 Part of the second connection portion 32 of the single reinforcement panel 30 is connected to the center floor 11 of the vehicle body 10, and part of the second connection portion 32 is connected to the rocker beam 12 of the vehicle body 10. Since it is relatively easy to provide a connection structure at the center floor 11 and the rocker beam 12 of the vehicle body 10, by connecting part of the second connection portion 32 of the single reinforcement panel 30 to the center floor 11 of the vehicle body 10 and part of the second connection portion 32 to the rocker beam 12 of the vehicle body 10, the second connection portion 32 of the reinforcement panel 30 can be more easily connected to the vehicle body 10.

[0041] According to some embodiments of the present invention, referring to Figure 2-Figure 4 The first connection portion 31 is connected to the vibration damping structure 40 via a first fastener 35, and the second connection portion 32 is connected to the vehicle body 10 via a second fastener 36. Connecting the first connection portion 31 to the vibration damping structure 40 via the first fastener 35 provides a more stable connection between the vibration damping structure 40 and the first connection portion 31, and connecting the second connection portion 32 to the vehicle body 10 via the second fastener 36 provides a more stable connection between the second connection portion 32 and the vehicle body 10, thereby further improving the dynamic stiffness of the reinforcement plate 30 at the mounting point of the subframe 20.

[0042] For example, the first fastener 35 may be an M14 bolt.

[0043] For example, the second fasteners 36 may be a plurality of M10 bolts. For example, a single reinforcement plate 30 includes two second connecting portions 32, one of which is connected to the center floor 11 of the vehicle body 10 and the other is connected to the rocker beam 12 of the vehicle body 10. One second connecting portion 32 is connected to the center floor 11 of the vehicle body 10 via two M10 bolts, and the other second connecting portion 32 is connected to the rocker beam 12 of the vehicle body 10 via one M10 bolt.

[0044] According to some embodiments of the present invention, referring to Figure 2 The vibration damping structure 40 includes a vibration damping block 41. The mounting portion 21 has a receiving hole 22 formed therein. The vibration damping block 41 is positioned within the receiving hole 22 and secured to the mounting portion 21. A first fastener 35 is provided through the first connecting portion 31, the vibration damping block 41, and the vehicle body 10 to connect the first connecting portion 31, the mounting portion 21, and the vehicle body 10. By providing the first fastener 35 through the first connecting portion 31, the vibration damping block 41, and the vehicle body 10, the connection between the first connecting portion 31, the mounting portion 21, and the vehicle body 10 is further tightened, thereby further improving the dynamic stiffness of the reinforcement plate 30 at the mounting point of the subframe 20.

[0045] According to some embodiments of the present invention, the thickness of the reinforcing plate 30 is a, and the value range of a is 1.2mm to 4.5mm. For example, the thickness of the reinforcing plate 30 can be 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, etc. By ensuring that the thickness of the reinforcing plate 30 is not less than 1.2mm, the reinforcing plate 30 can have sufficient rigidity, reducing the risk of bending or cracking of the reinforcing plate 30, and effectively improving the dynamic rigidity of the sub-frame 20 mounting point. After the thickness of the reinforcing plate 30 reaches a certain value, as the thickness of the reinforcing plate 30 increases, the increase in the dynamic rigidity of the sub-frame 20 mounting point by the increase in the thickness of the reinforcing plate 30 is very limited. By ensuring that the thickness of the reinforcing plate 30 is not greater than 4.5mm, the dynamic rigidity of the sub-frame 20 mounting point can be increased as effectively as possible while saving costs.

[0046] According to some embodiments of the present invention, the reinforcement plate 30 is constructed from a steel plate, an aluminum alloy plate, an aluminum plate, or a carbon fiber plate. This provides sufficient rigidity to the reinforcement plate 30, reducing the risk of breakage or bending, and effectively improving the dynamic stiffness of the subframe 20 mounting point. Furthermore, the weight of the reinforcement plate 30 can be reduced, contributing to the overall vehicle lightweighting.

[0047] The vehicle 100 according to the embodiment of the present invention will be further described below with reference to some embodiments and comparative examples.

[0048] Embodiment 1: The vehicle 100 is a vehicle 100 according to some embodiments of the present invention.

[0049] Comparative example: The vehicle 100 does not include the reinforcement plate 30 in the embodiment of the present invention.

[0050] The X-direction dynamic stiffness test and the Y-direction dynamic stiffness test were performed on the above-mentioned Example 1 and the comparative example respectively.

[0051] Reference Figure 5 , Figure 5The following are the results of X- and Y-direction dynamic stiffness tests conducted on Example 1 and the comparative example. The X-direction dynamic stiffness at the mounting point of the subframe 20 to the vehicle body 10 in Example 1 is 32.44 kN / mm @ 365 Hz, while the X-direction dynamic stiffness at the mounting point of the subframe 20 to the vehicle body 10 in the comparative example is 29.31 kN / mm @ 400 Hz. The Y-direction dynamic stiffness at the mounting point of the subframe 20 to the vehicle body 10 in Example 1 is 13.40 kN / mm @ 206 Hz, while the Y-direction dynamic stiffness at the mounting point of the subframe 20 to the vehicle body 10 in the comparative example is 9.54 kN / mm @ 245 Hz. The dynamic stiffness in both the X and Y directions at the mounting point of the subframe 20 to the vehicle body 10 in Example 1 is significantly higher. The higher the passive side dynamic stiffness, the better the vibration isolation rate at that point. This demonstrates that Example 1 significantly improves the vibration isolation rate and that the vehicle 100 NVH performance of Example 1 is superior.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0053] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0054] In the description of the present invention, “plurality” means two or more.

[0055] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0056] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0057] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vehicle (100), characterized in that: include: body (10); A subframe (20), the subframe (20) having a plurality of mounting portions (21), each of the mounting portions (21) being connected to the vehicle body (10) via a vibration-damping structure (40); A reinforcing plate (30) having a first connecting portion (31) and a second connecting portion (32), wherein the first connecting portion (31) abuts against the upper surface of the mounting portion (21) and is connected to the vibration damping structure (40), and the second connecting portion (32) is connected to the vehicle body (10).

2. The vehicle (100) according to claim 1, characterized in that A single reinforcing plate (30) includes a plurality of second connecting portions (32), the second connecting portion (32) of each reinforcing plate (30) is connected to the corresponding first connecting portion (31) via a connecting arm (33), and the plurality of connecting arms (33) of each reinforcing plate (30) are arranged at intervals along the circumference of the first connecting portion (31).

3. The vehicle (100) according to claim 2, characterized in that At least some of the connecting arms (33) in the same reinforcing plate (30) are arranged at an angle therebetween.

4. The vehicle (100) according to claim 3, characterized in that Part of the connecting arms (33) in a single reinforcing plate (30) extends along the X direction, and part of the connecting arms (33) extends along the Y direction.

5. The vehicle (100) according to claim 2, characterized in that The connecting arm (33) is provided with a reinforcing rib (34).

6. The vehicle (100) according to claim 2, characterized in that Part of the second connection portion (32) in the single reinforcement plate (30) is connected to the center floor (11) of the vehicle body (10), and part of the second connection portion (32) is connected to the rocker beam (12) of the vehicle body (10).

7. The vehicle (100) according to claim 1, characterized in that The first connecting portion (31) is connected to the vibration damping structure (40) via a first fastener (35), and the second connecting portion (32) is connected to the vehicle body (10) via a second fastener (36).

8. The vehicle (100) according to claim 1, characterized in that The vibration damping structure (40) includes a vibration damping block (41), a receiving hole (22) is formed in the mounting portion (21), the vibration damping block (41) is arranged in the receiving hole (22) and fixed to the mounting portion (21), and a first fastener (35) is passed through the first connecting portion (31), the vibration damping block (41) and the vehicle body (10) to connect the first connecting portion (31), the mounting portion (21) and the vehicle body (10).

9. The vehicle (100) according to any one of claims 1 to 8, characterized in that The thickness of the reinforcing plate (30) ranges from 1.2 mm to 4.5 mm.

10. The vehicle (100) according to any one of claims 1 to 8, characterized in that The reinforcing plate (30) is a steel plate, an aluminum alloy plate, an aluminum plate, or a carbon fiber plate.

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