CN-224211144-U - Beam structure, automobile body assembly and vehicle

CN224211144UCN 224211144 UCN224211144 UCN 224211144UCN-224211144-U

Abstract

The application provides a beam structure, a vehicle body assembly and a vehicle. The embodiment of the application provides a beam structure, which is connected to a vehicle body main body and comprises a first beam plate and a second beam plate. Along the first direction, the second beam plate is connected to one side of the first beam plate, a first cavity and a second cavity are formed between the second beam plate and the first beam plate, the first cavity is communicated with the second cavity, the depth of the second cavity in the first direction is smaller than that of the first cavity in the first direction, and at least one second cavity is arranged on two opposite sides of the first cavity. The embodiment of the application also provides a vehicle body assembly, which comprises the beam structure and a vehicle body main body, wherein the beam structure is connected with the vehicle body main body. The embodiment of the application also provides a vehicle, which comprises the vehicle body assembly and a vehicle body, wherein the vehicle body assembly is connected with the vehicle body.

Inventors

ZHOU XUELIAN
HOU CHENYUAN
HUANG YINGLAI
LI LIZHI
LIU YING

Assignees

浙江吉利控股集团有限公司
吉利汽车研究院（宁波）有限公司

Dates

Publication Date: 20260508
Application Date: 20250526

Claims (10)

1. A beam structure connected to a body of a vehicle, the beam structure comprising: A first beam plate; The first beam plate is connected to one side of the first beam plate along a first direction, a first cavity and a second cavity are formed between the second beam plate and the first beam plate, the first cavity is communicated with the second cavity, the depth of the second cavity in the first direction is smaller than that of the first cavity in the first direction, and at least one second cavity is arranged on two opposite sides of the first cavity along a second direction, and the second direction is intersected with the first direction.
2. The beam structure of claim 1, wherein the second beam plate is provided with a first protrusion and a second protrusion, the first protrusion being spaced from the first beam plate to form the first cavity between the first protrusion and the first beam plate, the second protrusion being spaced from the first beam plate to form the second cavity between the second protrusion and the first beam plate, a spacing between the first protrusion and the first beam plate being greater than a spacing between the second protrusion and the first beam plate.
3. The beam structure of claim 1, wherein two of the second cavities are disposed on both sides of the first cavity in the second direction, the first cavity has a defined first center line, the first center line extends in a direction parallel to the first direction, and the two second cavities are symmetrically disposed with respect to the first center line.
4. The beam structure of claim 3, wherein the first cavity comprises a middle section and two graded sections, the two graded sections being connected to both sides of the middle section in the second direction, the cavity depth of the graded sections decreasing linearly from a side closer to the middle section to a side farther from the middle section.
5. The beam structure of claim 1, further comprising a support member attached to a side of the second beam panel remote from the first beam panel in the first direction, the support member configured to be attached to the body.
6. The beam structure of claim 5, wherein a section of the second beam plate corresponding to a projection of the support member onto the second beam plate in the first direction is a first region, and a section of the second beam plate forming the second cavity is set as a second region, and two sides of the first region in the second direction exceed the second region.
7. The beam structure of claim 1, further comprising a connector located on at least one side of the first and second beam panels in the second direction, the connector being connected to the first and second beam panels, the connector being configured to be connected to the body.
8. The beam structure of claim 7, wherein the connector forms a third cavity with the first beam plate and the second beam plate, the third cavity being in communication with the first cavity and the second cavity.
9. A vehicle body assembly, the vehicle body assembly comprising: The beam structure of any one of claims 1 to 8; And the beam structure is connected to the body.
10. A vehicle, characterized in that the vehicle comprises: the vehicle body assembly of claim 9; a vehicle body to which the body assembly is connected.

Description

Beam structure, automobile body assembly and vehicle Technical Field The application relates to the technical field of vehicles, in particular to a beam structure, a vehicle body assembly and a vehicle. Background With increasing attention to environmental protection and sustainable development, new energy automobiles are gradually developed. The pure electric vehicle and the pure electric mode of the hybrid electric vehicle are not excited by the traditional fuel engine, so that low-frequency road noise caused by road surface excitation becomes the primary problem of NVH (Noise, vibration, harshness, noise, vibration and harshness) of the vehicle when the vehicle runs. The beam structure between the upper body top cover and the front windshield or the rear windshield of the passenger car plays an important role in the overall rigidity, safety, fatigue durability, NVH and other performances of the car body. To solve the NVH problem, structural strength is mostly improved by increasing a cross-sectional area of a cross member or adding parts, however, this increases costs and causes an increase in weight of a body structure on an automobile. Disclosure of utility model In order to solve the noise problem of a vehicle, embodiments of the present application provide a cross beam structure, a vehicle body assembly, and a vehicle that can reduce vehicle noise without increasing the weight of the vehicle body structure on the vehicle. The embodiment of the application provides a beam structure which is connected to a vehicle body main body, wherein the beam structure comprises a first beam plate and a second beam plate, the second beam plate is connected to one side of the first beam plate along a first direction, a first cavity and a second cavity are formed between the second beam plate and the first beam plate, the first cavity is communicated with the second cavity, the cavity depth of the second cavity in the first direction is smaller than the cavity depth of the first cavity in the first direction, at least one second cavity is arranged on two opposite sides of the first cavity, and the second direction intersects with the first direction. It can be appreciated that when the cavity depth of the second cavity in the first direction is smaller than the cavity depth of the first cavity in the first direction, the beam structure can effectively avoid frequencies with certain low-frequency excitation frequencies with larger wheel core excitation, so that noise generated by the vehicle roof, the front windshield and the rear windshield panel is reduced. Meanwhile, the beam structure does not increase the structure or the volume, so that the balance between the structural rigidity and the modal frequency distribution is realized, the low-frequency noise problem is solved, and the weight of the beam structure is not increased. In an embodiment, the second beam plate is provided with a first protrusion and a second protrusion, the first protrusion and the first beam plate are spaced apart to form the first cavity between the first protrusion and the first beam plate, the second protrusion and the first beam plate are spaced apart to form the second cavity between the second protrusion and the first beam plate, and a distance between the first protrusion and the first beam plate is greater than a distance between the second protrusion and the first beam plate. In an embodiment, two second cavities are disposed, the two second cavities are respectively located at two sides of the first cavity in the second direction, the first cavity has a defined first center line, an extending direction of the first center line is parallel to the first direction, and the two second cavities are symmetrically disposed with the first center line as a reference. In an embodiment, the first cavity includes a middle section and two gradient sections, and along the second direction, the two gradient sections are communicated with two sides of the middle section, and the cavity depth of the gradient sections decreases linearly from one side close to the middle section to one side far away from the middle section. In an embodiment, the beam structure further includes a support member connected to a side of the second beam plate remote from the first beam plate in the first direction, the support member being configured to be connected to the body. In an embodiment, along the first direction, a region of the second beam plate corresponding to the projection of the support piece on the second beam plate is a first region, a region of the second beam plate forming the second cavity is set as a second region, and along the second direction, two sides of the first region exceed the second region. In an embodiment, the beam structure further includes a connecting member located on at least one side of the first and second beam plates in the second direction, and the connecting member is connected to the first and second beam plates, and the conn