Top cover inner plate and automobile

Abstract

The application provides a roof inner plate and a car, the roof inner plate is provided with a sunroof mounting hole, has two side frames, and is provided with a front frame and a rear frame connected between the two side frames; each side frame is provided with a side frame reinforcing part, the side frame reinforcing part comprises a protrusion arranged on the side frame, the protrusion extends along the X direction of the whole vehicle, and the protrusion arches towards one side of the sunroof mounting hole; the rear frame is provided with a rear frame reinforcing part, the rear frame reinforcing part comprises a plurality of platform structures arranged along the X direction of the whole vehicle in sequence, each platform structure extends along the Y direction of the whole vehicle, and the plurality of platform structures are arranged in a stepped manner along the arrangement direction. The roof inner plate can increase the structural strength of the roof inner plate, reduce the vibration transmission sensitivity, and thus reduce the vibration noise generated when the top of the vehicle body is excited.

Description

Technical Field

[0001] This invention relates to the field of automotive body technology, and particularly to an inner roof panel. The invention also relates to an automobile having the aforementioned inner roof panel. Background Technology

[0002] With the development of automotive technology and the continuous improvement of people's living standards, consumers have increasingly higher requirements for automotive quality. NVH (Noise, Vibration, and Harshness) characteristics are one of the most superficial and direct experiences users have of a car. Furthermore, with the accelerated development of automotive electrification, road noise and wind noise have become the main noise sources for cars due to the absence of vibration excitation from traditional internal combustion engines. Therefore, reducing road noise and wind noise has become one of the important tasks of automotive NVH control.

[0003] When a car is in motion, vibrations caused by uneven road surfaces excite the modal frequencies of components such as the roof panel and sunroof panel, resulting in low-to-mid-frequency rumbling. Simultaneously, airflow friction against the vehicle body also generates vibrational excitation energy, which in turn excites the roof panel to vibrate and produce noise. Current technologies primarily aim to reduce the low-to-mid-frequency energy generated by vibration and decrease the vibration response by increasing the thickness of the roof panel and adding mass blocks or vibration absorbers inside the sunroof crossbeam. However, increasing the panel thickness or adding mass blocks or vibration absorbers increases the weight of the roof section, which is detrimental to the overall lightweight design of the vehicle. Summary of the Invention

[0004] In view of this, the present invention aims to provide an inner panel for the roof that can reduce vibration noise generated when the roof of the vehicle body is excited.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A top cover inner panel, the top cover inner panel having a skylight mounting opening and having two side frames, as well as a front frame and a rear frame connected between the two side frames;

[0007] Each of the aforementioned side frames is provided with a side frame reinforcement portion, the side frame reinforcement portion including a protrusion provided on the side frame, the protrusion extending along the X direction of the whole vehicle, and the protrusion arching towards the sunroof mounting opening side;

[0008] The rear frame is provided with a rear frame reinforcement, which includes multiple platform structures arranged sequentially along the X direction of the vehicle. Each platform structure extends along the Y direction of the vehicle, and the multiple platform structures are arranged in a stepped shape along the arrangement direction.

[0009] Furthermore, on the XY plane of the entire vehicle, the line connecting the apex of the protrusion and the two endpoints of the protrusion's extension direction forms a triangle.

[0010] Furthermore, the X-direction of the vehicle is the front-to-back direction of the vehicle. In the X-direction of the vehicle, the perpendicular distance L1 between the vertex position and the front end of the side frame, and the perpendicular distance L2 between the vertex position and the rear end of the side frame, satisfy L1:L2 = 1:2.

[0011] Furthermore, on the XZ plane of the vehicle, the raised outer contour has two long sides on one side and two short sides on the other side, with an included angle between the two long sides and between the two short sides, and the long sides on both sides are connected to the short sides to form a ring.

[0012] Furthermore, the rear frame reinforcement is located on the side of the rear frame near the sunroof mounting opening, and the X-axis of the vehicle is the front-to-back direction of the vehicle. In the X-axis of the vehicle, the height of each platform structure decreases sequentially from front to back.

[0013] Furthermore, in the X-direction of the vehicle, the width of each platform structure increases sequentially from front to back, and the width is the width of the platform structure along the X-direction of the vehicle.

[0014] Furthermore, the number of platform structures is three, and the ratio of the widths of each platform structure from front to back along the arrangement direction of each platform structure is 1:2:4.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The inner top cover panel of the present invention has a side frame reinforcement on the side frame, and the side frame reinforcement is a protrusion that arches towards the skylight installation opening. The high strength of the arched structure can increase the structural strength of the inner top cover panel. At the same time, by setting a rear frame reinforcement in a stepped arrangement on the rear frame, the high strength of the stepped structure can also improve the structural strength of the rear part of the inner top cover panel.

[0017] Therefore, this invention can improve the structural strength of the inner panel of the roof and reduce the sensitivity of vibration transmission, thereby reducing the vibration noise generated when the vehicle roof is excited. Furthermore, compared to existing methods such as increasing plate thickness and adding mass blocks, this invention does not increase the weight of the roof, which is beneficial for lightweight vehicle design and has excellent practicality.

[0018] Furthermore, the present invention utilizes the triangular shape formed by the line connecting the apex of the protrusion and its two endpoints, leveraging the strength of the triangle structure to further enhance the strength of the side frame reinforcement. The proportional setting of the distance between the apex of the protrusion and the perpendicular distance between the two ends of the side frame maximizes frequency avoidance design, effectively decomposing vibration frequencies. Simultaneously, this proportional setting also positions the side frame with the highest strength at the weakest points of the inner roof panel and skylight, thus effectively reinforcing the inner roof panel and skylight, increasing the strength of both sides of the inner roof panel, and reducing vibration transmission sensitivity and vibration noise energy.

[0019] Furthermore, in this invention, the outer contour of the protrusion projected onto the XZ plane of the vehicle is composed of two connected long sides and two short sides, which makes the outer contour of the protrusion projected onto the XZ plane of the vehicle similar to a spindle shape. It can also take advantage of the high strength of the spindle-shaped structure to improve the structural strength of the inner panel of the top cover.

[0020] In addition, the rear frame reinforcement in this invention adopts a stepped platform structure, which is simple in structure and easy to design and form. On the other hand, by utilizing the different widths of each platform structure, frequency avoidance design can be achieved to avoid resonance problems caused by the same frequency of each platform structure, thereby helping to reduce vibration noise energy when excited.

[0021] The present invention also proposes an automobile having a roof inner panel as described above in the body of the automobile.

[0022] Furthermore, the vehicle body has a roof front crossbeam connected to the front frame, and the roof front crossbeam has an overlapping edge on the side near the front frame, and the front frame is connected to the overlapping edge.

[0023] The overlapping edge is provided with a reinforcing part, which arches out to one side of the overlapping edge. There are multiple reinforcing parts, which are arranged at intervals along the left and right directions of the overlapping edge. The ratio between the sag height h and the chord length k of each reinforcing part is different.

[0024] Furthermore, the overlapping edge has an arched structure with the notch facing backward, and the ratio between the sag H of the overlapping edge and the chord length C of the overlapping edge is between 0.05 and 0.09.

[0025] Furthermore, the front crossbeam of the top cover includes an upper crossbeam and a lower crossbeam that are fastened together. The upper crossbeam has an upper edge on the side near the front frame, and the lower crossbeam has a lower edge on the side near the front frame.

[0026] The overlapping edge is formed by the superposition of the upper overlapping edge and the lower overlapping edge, and each of the reinforcing parts is disposed on the lower overlapping edge and located in the middle of the lower overlapping edge in the left-right direction.

[0027] Furthermore, each of the reinforcing parts has an arched structure with the notch facing upwards; there are three reinforcing parts, and the ratio between the sag height h and the chord length k of the middle reinforcing part is between 0.48 and 0.52, the ratio between the sag height h and the chord length k of the reinforcing part on one side is between 0.38 and 0.42, and the ratio between the sag height h and the chord length k of the reinforcing part on the other side is between 0.28 and 0.32.

[0028] The automobile described in this invention has a roof inner panel installed in the body, which can reduce the vibration transmission sensitivity of the top of the vehicle body by increasing the structural strength of the roof inner panel, thereby reducing the vibration noise generated when the top of the vehicle body is excited and improving the NVH performance of the automobile.

[0029] Furthermore, the present invention connects the front part of the inner panel of the roof to the front crossbeam of the roof, and provides an arched reinforcement on the overlapping edge. This allows for the enhancement of the structural strength of the front crossbeam of the roof, and the use of the structural strength of the front crossbeam to enhance the strength of the front frame position. This increases the structural strength of the front part of the inner panel of the roof, reduces vibration transmission sensitivity, and reduces vibration noise generated when the roof of the vehicle is excited.

[0030] Furthermore, this invention utilizes the overall arched design of the overlapping edges to leverage the high strength of the arched structure, further enhancing the structural strength of the front frame by employing the front crossbeam of the top cover. This ensures that each reinforcing component is located in the middle of the overlapping edge's length, specifically strengthening the weakest point of the front frame, thereby reducing the vibration transmission sensitivity of the front of the inner panel of the top cover and lowering vibration noise energy. Attached Figure Description

[0031] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0032] Figure 1 This is a schematic diagram illustrating the installation of the inner roof panel on the top of the vehicle body according to an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of the inner plate of the top cover according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the protrusion structure described in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the back of the inner panel of the top cover according to an embodiment of the present invention;

[0036] Figure 5 This is a top view of the inner plate of the top cover according to an embodiment of the present invention;

[0037] Figure 6 This is a front view of the inner plate of the top cover according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of the rear frame according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram showing the width of the platform structure described in an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of the structure of the front crossbeam of the top cover according to an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the sag height H and chord length C of the overlapping edge according to an embodiment of the present invention;

[0042] Figure 11 This is a schematic diagram of the structure of the upper beam of the crossbeam according to an embodiment of the present invention;

[0043] Figure 12 This is a schematic diagram of the structure of the lower beam of the crossbeam according to an embodiment of the present invention;

[0044] Figure 13 This is a schematic diagram of the sagittal height h and chord length k of the reinforcing part according to an embodiment of the present invention;

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Upper side beam;

[0047] 2. Inner panel of the top cover; 20. Skylight mounting opening; 21. Side frame; 210. Protrusion; 210t. Long side; 210n. Short side; 211. Top wall; 212. Mounting platform; 22. Front frame; 23. Rear frame; 231. First platform structure; 232. Second platform structure; 233. Third platform structure; 234. Weight reduction hole;

[0048] 3. Front crossbeam of the top cover; 30. Overlap edge; 31. Upper beam of the crossbeam; 311. Upper overlap edge; 312. Upper beam reinforcement; 313. Upper beam through hole; 32. Lower beam of the crossbeam; 321. Lower overlap edge; 322. First reinforcement; 323. Second reinforcement; 324. Third reinforcement; 325. Lower beam through hole;

[0049] a. Front end point; b. Back end point; c. Vertex position; e. Front end of side border; f. Back end of side border. Detailed Implementation

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0051] In the description of this invention, it should be noted that the use of terms such as "upper," "lower," "inner," and "outer," indicating orientation or positional relationship, is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the use of terms such as "first" and "second" is also for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0053] Furthermore, in the description of this invention, the X, Y, and Z axes refer to the length direction (front-to-back direction), width direction (left-to-right direction), and height direction (up-down direction) of the vehicle, respectively. That is, in the vehicle coordinate system, the X-axis is along the length direction of the vehicle, the Y-axis is along the width direction of the vehicle, and the Z-axis is along the height direction of the vehicle. Additionally, the XY plane in this invention refers to the plane containing the X and Y axes, the XZ plane refers to the plane containing the X and Z axes, and the YZ plane refers to the plane containing the Y and Z axes.

[0054] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] This embodiment relates to a roof inner panel 2, which can improve the structural strength of the vehicle roof by increasing the structural strength of the roof inner panel 2, reduce the vibration transmission sensitivity of the vehicle roof structure, and reduce the vibration noise generated when the vehicle roof is excited.

[0056] In terms of overall design, such as Figure 1 and Figure 2 As shown, in this embodiment, the inner roof panel 2 is disposed between the upper side beams 1 on both sides. The inner roof panel 2 has a sunroof mounting opening 20, which allows the inner roof panel 2 to have side frames 21 on the left and right sides, and a front frame 22 and a rear frame 23 connecting the two side frames 21. The two side frames 21 are arranged side-by-side in the Y-direction of the vehicle. The front frame 22 is positioned close to the front of the vehicle in the X-direction, and the rear frame 23 is positioned close to the rear of the vehicle in the X-direction. Each side frame 21 is also connected to the inner side of the upper side beam 1 on the same side.

[0057] Specifically, the inner top cover panel 2, composed of the front frame 22, the rear frame 23, and the side frames 21 on both sides, can be integrally formed by stamping. In this embodiment, each side frame 21 is provided with a side frame reinforcement, and at this time, combined with… Figure 3 and Figure 4 As shown, in a preferred embodiment, the side frame reinforcement on each side frame 21 is provided on the side of the side frame 21 away from the sunroof mounting opening 20, and based on... Figure 1 As shown, the side away from the sunroof mounting opening 20 is also the side of the side frame 21 that is close to the upper side beam 1 of the side wall.

[0058] Furthermore, in terms of specific structure, the side frame reinforcement in this embodiment includes a protrusion 210 disposed on the side frame 21. This protrusion 210 is generally integrally formed on the side frame 21 by stamping, and specifically extends along the X-direction of the entire vehicle, that is, the length direction of the side frame 21, thus making the protrusion 210 an elongated structure arranged along the length direction of the entire vehicle. In addition, the protrusions 210 at both sides of the side frame 21 arch towards the sunroof mounting opening 20, thereby utilizing the high strength of the arched structure to increase the structural strength of the inner roof panel 2 and reduce vibration transmission sensitivity.

[0059] In this embodiment, for ease of description, the vertex position of the protrusion 210 is marked as "c", and combined with Figure 5 As shown, taking the protrusion 210 on one of the side frame 21 as an example, on the XY plane of the whole vehicle, the line connecting the apex position c of the protrusion 210 and the two endpoints of the extension direction of the protrusion 210 also forms a triangle.

[0060] For ease of description, the positions of the two endpoints of the protrusion 210 in the direction of extension are respectively marked as... Figure 5 The triangle formed by the lines connecting vertex c, front point a, and rear point b is shown in the diagram. Front point a is closer to the front of the car, and rear point b is closer to the rear of the car. Figure 5 As shown by the dotted line in the diagram. The line connecting the apex c of the protrusion 210 and the two endpoints of the protrusion 210 forms a triangle. The strength of the triangle structure can be utilized to further enhance the strength of the side frame reinforcement, thereby increasing the strength of the side frame 21.

[0061] See also Figure 5As shown, based on the X-axis of the entire vehicle being the front-to-back direction, taking one side frame 21 as an example, the front end of the side frame 21, that is, the end of the side frame 21 closer to the front of the vehicle, is marked as the front end e, and the rear end of the side frame 21, that is, the end of the side frame 21 closer to the rear of the vehicle, is marked as the rear end f. Based on this, in this embodiment, the perpendicular distance L1 between the apex position c of the protrusion 210 and the front end e of the side frame, and the perpendicular distance L2 between the apex position c of the protrusion 210 and the rear end f of the side frame, satisfy L1:L2 = 1:2.

[0062] At this point, by setting the ratio between the distances L1 and L2 mentioned above, the apex position c of the protrusion 210 is located at one-third of the side frame 21. This not only maximizes the frequency avoidance design and effectively decomposes the vibration frequency, but also places the side frame 21 at its strongest position on the inner top plate 2 and the weakest point of the skylight. This effectively strengthens the inner top plate 2 and the skylight, increases the structural strength on both sides of the inner top plate 2, and reduces vibration transmission sensitivity and vibration noise energy.

[0063] like Figure 6 As shown, to better enhance the structural strength of the side frame reinforcement formed by the protrusions 210, this embodiment still takes one of the protrusions 210 as an example. On the XZ plane of the entire vehicle, the outer contour of the protrusion 210 has two long sides 210t on one side and two short sides 210n on the other side. The two long sides 210t are located on the side closer to the rear of the vehicle, and correspondingly, the two short sides 210n are located on the side closer to the front of the vehicle. At the same time, there are included angles between the two long sides 210t and between the two short sides 210n, and the long sides 210t and the short sides 210n on both sides are connected to form a ring.

[0064] At this time, still combined Figure 5 and Figure 6 As shown, based on the aforementioned markings of the apex and two ends of the protrusion 210, the short side 210n is located between the front end point a and the vertex position c, and the long side 210t is located between the rear end point b and the vertex position c. The outer contour projected onto the XZ plane of the entire vehicle by the protrusion 210 is composed of two connected long sides 210t and two short sides 210n, making the outer contour of the protrusion 210 projected onto the XZ plane of the entire vehicle resemble a spindle shape. Since the spindle shape can be considered as being composed of two oppositely arranged triangular structures, the high strength of the spindle-shaped structure can be utilized to improve the structural strength of the inner panel 2 of the top cover, thereby reducing vibration transmission sensitivity and vibration noise energy.

[0065] In this embodiment, it is still by Figure 4As shown, in terms of specific structure, a top wall 211 is provided on the top of the protrusion 210. In specific implementation, the top wall 211 is equivalent to the side edge of the inner panel 2 of the top cover and is used to connect with the upper side beam 1 of the side wall. In addition, besides the side frame reinforcement formed by the protrusion 210 on the side near the upper side beam 1, multiple mounting platforms 213 are also provided on the side of the two side frames 21 near the sunroof mounting opening 20. Each mounting platform 213 is also integrally formed on the side frame 21 and is usually formed by stamping. At the same time, mounting holes are provided on each mounting platform 213 for installing the sunroof assembly, and projection-welded nuts can also be provided in the mounting holes to facilitate the installation of the sunroof assembly.

[0066] In this embodiment, a rear frame reinforcement is also provided on the rear frame 23. In a preferred embodiment, the rear frame reinforcement is located on the side of the rear frame 23 closest to the sunroof mounting opening 20. Specifically, as... Figure 7 and Figure 8 As shown, the rear frame reinforcement includes multiple platform structures integrally formed at the rear frame 23 and arranged sequentially along the X-direction of the vehicle. Each platform structure is roughly flat and extends along the Y-direction of the vehicle. In addition, the multiple platform structures are also arranged in a stepped manner along the arrangement direction.

[0067] By making the rear frame reinforcement part consist of multiple platform structures arranged in a stepped shape, the large sheet metal at the rear frame 23 can be decomposed into multiple small plates, and the structural strength at the rear frame 23 position can be improved by taking advantage of the high strength of the stepped structure.

[0068] Furthermore, as a preferred embodiment, this example further establishes that, based on the vehicle's X-axis as the longitudinal direction, the height of the multiple platform structures arranged in a stepped manner decreases sequentially from front to back along the X-axis. This sequential decrease in the height of each platform structure facilitates the placement of the sunroof assembly at the sunroof mounting opening 20, and also benefits the overall design of the rear structure of the vehicle's roof. To avoid resonance caused by identical modal frequencies or vibration frequencies among the platform structures, thus achieving frequency avoidance design, this embodiment also ensures that the width of each platform structure increases sequentially from front to back along the X-axis, specifically referring to the width of the platform structure along the vehicle's X-axis.

[0069] In specific implementation, it is still combined with Figure 7 and Figure 8As shown, for example, the number of platform structures constituting the rear frame reinforcement can be set to three. For ease of description, the three platform structures can be referred to as the first platform structure 231, the second platform structure 232, and the third platform structure 233, respectively. Furthermore, based on the fact that the widths of the aforementioned platform structures increase sequentially from front to back, the ratio between the widths m1, m2, and m3 of the three platform structures can be designed as 1:2:4. That is, m1:m2:m3 = 1:2:4.

[0070] It is understandable that the width ratio settings between the above platform structures can better improve the structural strength at the rear frame 23, thereby reducing the vibration transmission sensitivity at the rear frame 23 and reducing the vibration noise energy when excited.

[0071] Of course, besides decreasing the height of each platform structure from front to back, it is also possible to increase the height from back to front. In this case, the structure of the sunroof assembly can be adjusted to meet the installation requirements of the sunroof assembly. In addition, besides setting the number of stepped platform structures to three, the number of platform structures can also be adjusted according to the width of the rear frame 23 along the X direction of the whole vehicle. When the number of platform structures changes, the width ratio of each platform structure can also be adjusted accordingly.

[0072] In this embodiment, to facilitate weight reduction at the rear frame 23 and thus promote lightweight design, weight-reducing holes 234 are also provided on each platform structure constituting the rear frame reinforcement. The weight-reducing holes 234 can be elongated holes or square holes opened on the platform structures. Furthermore, depending on the width of the platform structures themselves, it is also possible to omit the weight-reducing holes 234 on some of the narrower platform structures, or to make the weight-reducing holes 234 span across two adjacent platform structures.

[0073] In this embodiment, the inner top cover 2, through the innovative design of the structure at the side frame 21 and rear frame 23, can reduce the vibration response sensitivity of the inner top cover 2 by increasing the structural strength of the inner top cover 2, thereby reducing the vibration noise generated by the inner top cover 2 under road excitation and wind excitation, thus creating a quiet and comfortable driving space for the vehicle and having good practicality.

[0074] Example 2

[0075] This embodiment relates to a vehicle, the body of which includes the aforementioned inner roof panel 2. Meanwhile, as a preferred embodiment, [the following is a description of the process, not a direct translation]... Figure 1 and combined Figure 9 As shown, the vehicle body in this embodiment also has a roof front crossbeam 3 connected to the front frame 22, and the roof front crossbeam 3 has an overlapping edge 30 on the side near the front frame 22, and the front frame 22 is specifically connected to the overlapping edge 30.

[0076] In practice, the front frame 22 and the overlapping edge 30 are usually connected by welding. By connecting the front frame 22 and the overlapping edge 30, the strength of the front crossbeam 3 of the top cover can be used to increase the strength of the front frame 22, thereby improving the structural strength of the front part of the inner plate 2 of the top cover, reducing the vibration transmission sensitivity, and reducing the vibration noise energy when excited.

[0077] Based on the connection between the front crossbeam 3 of the roof and the front frame 22 via the overlapping edge 30, this embodiment further increases the structural strength of the overlapping edge 30, i.e., the front frame 22. The overlapping edge 30 is generally an arched structure with a concave opening facing backward, i.e., the overlapping edge 30 arches outward towards the front of the vehicle along the X direction of the whole vehicle. Moreover, referring to... Figure 10 As shown, in the arched overlapping edge 30, the ratio between its sag H and its chord length C is between 0.05 and 0.09, that is, H / C = 0.05-0.09. Furthermore, as... Figure 10 As shown, the chord length C is the distance between the two ends of the overlapping edge 30, and the sag H is the perpendicular distance between the highest point of the arched overlapping edge 30 and the line connecting the two ends of the overlapping edge 30. Of course, the meanings of the sag h and chord length k of the various reinforcing parts that are also arched structures in this embodiment are the same.

[0078] In specific implementations, the ratio between the aforementioned rise H and chord length C can be, for example, 0.05, 0.06, 0.07, 0.08, or 0.09, and preferably 0.07. Simultaneously, in this embodiment, the overlapping edge 30 adopts an arched structure with the notch facing backwards. This utilizes the high strength of the arched structure to enhance the structural strength of the overlapping edge 30, i.e., the front crossbeam body 3. It should be noted that when the overlapping edge 30 adopts an arched structure, the portion of the inner plate 2 of the top cover connected to the overlapping edge 30 should also be set as an arched structure matching the overlapping edge 30. Furthermore, besides making the overlapping edge 30 a forward-arching structure, other parts of the front crossbeam body 3 can also be forward-arching structures. When other parts of the front crossbeam body 3 also have arched structures, the ratio between their rise and chord length is preferably designed to be the same as that at the overlapping edge 30.

[0079] In this embodiment, to enhance the structural strength of the front crossbeam 3 of the top cover, and thereby enhance the structural strength of the front part of the inner plate 2 of the top cover, i.e., the front frame 22, a reinforcing part is also provided on the overlapping edge 30. This reinforcing part arches out to one side of the overlapping edge 30, and there are multiple reinforcing parts. These multiple reinforcing parts are arranged at intervals along the left and right directions of the overlapping edge 30, and the ratio between the sag height h and the chord length k of each reinforcing part is designed to be different.

[0080] In this preferred embodiment, multiple reinforcing parts are arranged in the middle of the overlap edge at approximately 30 degrees. Furthermore, it is still composed of... Figure 9 and combined Figure 11 and Figure 12 As shown, the front crossbeam body 3 in this embodiment specifically includes an upper crossbeam body 31 and a lower crossbeam body 32 that are fastened together, and the upper crossbeam body 31 and the lower crossbeam body 32 can usually be connected together by welding. At the same time, an upper overlapping edge 311 is provided on the side of the upper crossbeam body 31 near the inner plate 2 of the top cover, and a lower overlapping edge 321 is also provided on the side of the lower crossbeam body 32 near the inner plate 2 of the top cover. The aforementioned overlapping edge 30 is formed by the superposition of the upper overlapping edge 311 and the lower overlapping edge 321 after the upper crossbeam body 31 and the lower crossbeam body 32 are fastened together.

[0081] Based on the fact that the front crossbeam body 3 is composed of the upper crossbeam body 31 and the lower crossbeam body 32, in specific implementation, the inner plate of the top cover 2 is connected to the upper edge 311 of the upper crossbeam body 31. The aforementioned reinforcing parts are set on the lower edge 321, and as mentioned above, each reinforcing part is located in the middle of the lower edge 321 in the left-right direction, so as to further improve the structural strength of the weak middle position.

[0082] In specific implementation, as a preferred implementation method, please refer to [the relevant documentation]. Figure 12 As shown, each of the aforementioned reinforcing parts has an arched structure with the notch facing upwards. This also results in each reinforcing part being structurally integrally formed as a groove on the lower edge 321. This arrangement of the reinforcing parts not only simplifies the structure and facilitates molding, but also does not increase the weight of the front crossbeam body 3.

[0083] In this embodiment, during specific implementation, for example, the aforementioned reinforcing parts can be configured as three spaced apart along the lower edge 321 in the left-right direction, and for ease of description, the three reinforcing parts are respectively referred to as the first reinforcing part 322, the second reinforcing part 323, and the third reinforcing part 324. And combined with... Figure 13 As shown, based on the different ratios between the sagittal height h and the chord length k of each of the aforementioned reinforcing parts, as a preferred arrangement, in this embodiment, the ratio between the sagittal height h and the chord length k of the middle reinforcing part, namely the first reinforcing part 322, is set between 0.48 and 0.52, for example, it can be 0.48, 0.49, 0.50, 0.51 or 0.52.

[0084] Furthermore, the ratio of the sag height h to the chord length k of the reinforcing part on one side, namely the third reinforcing part 324, is set between 0.38 and 0.42, and for example, it can be 0.38, 0.39, 0.40, 0.41, or 0.42. The ratio of the sag height h to the chord length k of the reinforcing part on the other side, namely the second reinforcing part 323, is set between 0.28 and 0.32, and for example, it can be 0.28, 0.29, 0.30, 0.31, or 0.32.

[0085] By making the reinforcing part an arched structure, it can be understood that this embodiment can again utilize the high strength of the arched structure to increase the structural strength of the middle part of the lower edge 321, thereby improving the structural strength of the front part of the inner plate 2 of the top cover, thereby reducing the vibration transmission sensitivity of the inner plate 2 of the top cover and reducing the vibration noise energy when excited.

[0086] In addition, it should be noted that besides setting the aforementioned reinforcing parts as three spaced-apart sections, it is also possible to set two, four, or other numbers of reinforcing parts with the notches facing upwards. Furthermore, in this embodiment, multiple reinforcing parts are arranged at intervals. This design can also match the length of the front crossbeam body 3 and the front part of the inner roof panel 2 along the Y-direction of the entire vehicle, and multiple arched structures can be used to better enhance the structural strength of the middle position of the front crossbeam body 3 and the inner roof panel 2.

[0087] Of course, by making the ratio between the sag height h and the chord length k of each reinforcing part different, it can match the arched structure of the lower edge 321, which is conducive to the overall forming of the lower edge 321 and also helps to give full play to the role of each reinforcing part in improving the structural strength.

[0088] In this embodiment, see continue to refer to Figure 11 and Figure 12 As shown, in practical implementation, both the upper beam 31 and the lower beam 32 of the crossbeam can be made of sheet metal stamping parts. Moreover, to further improve the structural strength of each beam, reinforcing ribs can be provided on the upper beam 31 or the lower beam 32 of the crossbeam. At the same time, to facilitate weight reduction of the front crossbeam 3 of the top cover, weight-reducing structures can also be provided on the upper beam 31 or the lower beam 32 of the crossbeam.

[0089] At this point, taking the upper beam 31 as an example, an upper beam reinforcing rib 312 can be formed on it, and the reinforcing ribs on the lower beam 32 can adopt a similar structure to the upper beam reinforcing rib 312. Regarding the aforementioned weight-reduction structure, for example, upper beam through holes 313 and lower beam through holes 325 can be provided on the upper beam 31 and lower beam 32 respectively, so that the weight reduction of each beam can be achieved through these upper beam through holes 313 and lower beam through holes 325. Furthermore, extended connecting portions are provided at both ends of the lower beam 32 for connecting the front crossbeam 3 of the top cover and the upper side beams 1 of both sides.

[0090] This embodiment of the vehicle, through innovative design of the inner roof panel 2 and the front crossbeam 3, increases the structural strength of the front part of the inner roof panel 2. This reduces the vibration response sensitivity of the vehicle roof and decreases vibration noise generated by the roof structure under road and wind excitation, creating a quiet and comfortable driving space. Furthermore, compared to existing methods that increase panel thickness or add mass blocks, this design does not increase the weight of the roof, contributing to overall vehicle lightweight design and demonstrating excellent practicality.

[0091] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A top cover inner plate (2), characterized in that: The inner panel (2) of the top cover is provided with a skylight mounting opening (20) and has two side frames (21), as well as a front frame (22) and a rear frame (23) connected between the two side frames (21). Each of the side frames (21) is provided with a side frame reinforcement, the side frame reinforcement includes a protrusion (210) provided on the side frame (21), the protrusion (210) extends along the X direction of the whole vehicle, and the protrusion (210) arches out toward the sunroof mounting opening (20); The rear frame (23) is provided with a rear frame reinforcement, which includes multiple platform structures arranged sequentially along the X direction of the whole vehicle. Each platform structure extends along the Y direction of the whole vehicle, and the multiple platform structures are arranged in a stepped shape along the arrangement direction. The X direction of the whole vehicle is the front-to-back direction of the vehicle, and the Y direction of the whole vehicle is the left-to-right direction of the vehicle. On the XY plane of the whole vehicle, the line connecting the apex position (c) of the protrusion (210) and the two endpoint positions of the extension direction of the protrusion (210) forms a triangle; On the XZ plane of the vehicle, the outer contour of the protrusion (210) has two long sides (210t) on one side and two short sides (210n) on the other side. An included angle is formed between the two long sides (210t) and between the two short sides (210n). The long sides (210t) on both sides are connected to the short sides (210n) to form a ring.

2. The inner plate (2) of the top cover according to claim 1, characterized in that: In the X direction of the whole vehicle, the perpendicular distance L1 between the vertex position (c) and the front end of the side frame (21), and the perpendicular distance L2 between the vertex position (c) and the rear end of the side frame (21) satisfy L1:L2=1:

2.

3. The inner plate (2) of the top cover according to claim 1 or 2, characterized in that: The rear frame reinforcement is located on the side of the rear frame (23) near the sunroof mounting opening (20), and the height of each platform structure decreases sequentially from front to back in the X direction of the whole vehicle.

4. The inner plate (2) of the top cover according to claim 3, characterized in that: Along the X-axis of the vehicle, the width of each platform structure increases sequentially from front to back, and the width is the width of the platform structure along the X-axis of the vehicle.

5. The inner plate (2) of the top cover according to claim 4, characterized in that: The platform structure consists of three structures, arranged from front to back along the direction of each platform structure, with the width ratio of each platform structure being 1:2:

4.

6. A car, characterized in that: The vehicle body has a roof inner panel (2) as described in any one of claims 1 to 5.

7. The automobile according to claim 6, characterized in that: The vehicle body has a roof front crossbeam (3) connected to the front frame (22), and the roof front crossbeam (3) has an overlapping edge (30) on the side near the front frame (22), and the front frame (22) is connected to the overlapping edge (30); The overlapping edge (30) is provided with a reinforcing part, which arches out to one side of the overlapping edge (30). There are multiple reinforcing parts, which are arranged at intervals along the left and right directions of the overlapping edge (30). The ratio between the sag height h and the chord length k of each reinforcing part is different.

8. The automobile according to claim 7, characterized in that: The overlapping edge (30) has an arched structure with the notch facing backward. The ratio between the sag H of the overlapping edge (30) and the chord length C of the overlapping edge (30) is between 0.05 and 0.

09.

9. The automobile according to claim 8, characterized in that: The top cover front crossbeam (3) includes an upper crossbeam body (31) and a lower crossbeam body (32) that are fastened together. The upper crossbeam body (31) has an upper edge (311) on the side near the front frame (22), and the lower crossbeam body (32) has a lower edge (321) on the side near the front frame (22). The overlapping edge (30) is formed by superimposing the upper overlapping edge (311) and the lower overlapping edge (321), and each of the reinforcing parts is disposed on the lower overlapping edge (321) and located in the middle of the lower overlapping edge (321) in the left-right direction.

10. The automobile according to claim 9, characterized in that: Each of the aforementioned reinforcing parts has an arched structure with the notch facing upwards; The number of reinforcing parts is three, and the ratio between the sagitta height h and the chord length k of the middle reinforcing part is between 0.48 and 0.52, the ratio between the sagitta height h and the chord length k of the reinforcing part on one side is between 0.38 and 0.42, and the ratio between the sagitta height h and the chord length k of the reinforcing part on the other side is between 0.28 and 0.32.

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