Search

CN-116552641-B - Frame and cast beam structure optimization method

CN116552641BCN 116552641 BCN116552641 BCN 116552641BCN-116552641-B

Abstract

The invention discloses a frame and a cast beam structure optimization method, and belongs to the technical field of electric vehicles. The frame comprises a placing frame and a plurality of sections of frame bodies, wherein the plurality of sections of frame bodies are arranged at intervals, the placing frame is connected between two adjacent sections of frame bodies, a plurality of placing spaces for placing battery packs are formed on the inner sides of the placing frames, two ends of the placing frames extend to the outer sides of the frame bodies respectively, so that part of structures of the placing spaces are located on the outer sides of the frame bodies, and the lengths of the parts of the placing frames extending to the outer sides of the frame bodies are adjustable. The frame disclosed by the invention can be used for installing a battery pack with larger volume, and a plurality of battery packs with different volumes, so that the universality is better and the problem of the endurance mileage of an electric vehicle is favorably solved.

Inventors

  • LI YONG
  • HE XUANJING
  • ZHANG NENGZHONG
  • HE GAOFENG

Assignees

  • 上海苇渡汽车科技有限公司

Dates

Publication Date
20260512
Application Date
20230625

Claims (7)

  1. 1. The frame, its characterized in that includes: A plurality of sections of frame bodies (1), wherein the frame bodies (1) are arranged at intervals; the frame comprises a frame body (1) and a plurality of placing spaces (21) for placing battery packs (3), wherein the placing spaces (21) are formed in the inner sides of the frame body (2), and two ends of the placing frames (2) extend to the outer sides of the frame body (1) respectively, so that part of structures of the placing spaces (21) are positioned on the outer sides of the frame body (1), and the lengths of the parts of the placing frames (2) extending to the outer sides of the frame body (1) are adjustable; the frame body (1) comprises two first longitudinal beams (11) which are arranged in parallel, and the placing frame (2) comprises: the connecting cross beams (22) are arranged between the two first longitudinal beams (11), two ends of each connecting cross beam (22) extend to the outer sides of the corresponding first longitudinal beam (11), and the length of each connecting cross beam (22) is adjustable; The second longitudinal beam (23), the said second longitudinal beam (23) is parallel to said first longitudinal beam (11) and connects between two adjacent said connecting crossbeams (22); An outer frame (24) connected between two adjacent connecting cross beams (22) and extending to the outer side of the first longitudinal beam (11), wherein the size of the outer frame (24) is adjustable, and the second longitudinal beam (23) is arranged in the outer frame (24) so as to divide the interior of the outer frame (24) into a plurality of placing spaces (21); the connecting beam (22) comprises: A casting cross beam (221), wherein the second longitudinal beam (23) is connected to the casting cross beam (221), and two ends of the casting cross beam (221) are respectively connected to the two first longitudinal beams (11); The two ends of the casting cross beam (221) are respectively connected with the extension arm body (222), the extension arm body (222) is positioned at the outer side of the first longitudinal beam (11), and the length of the extension arm body (222) is adjustable; The casting beam (221) comprises: the novel beam comprises a beam body (2211), wherein an intermediate block (2212) is arranged on the beam body (2211) in a surrounding mode, a web plate (2213) is arranged on the intermediate block (2212), a second longitudinal beam (23) is connected to the web plate (2213) of the intermediate block (2212), connecting plates (2214) are respectively arranged at two ends of the beam body (2211), and the connecting plates (2214) are used for being connected with the first longitudinal beam (11).
  2. 2. The frame according to claim 1, characterized in that the cast cross member (221) is obtained using a topology optimization analysis.
  3. 3. The frame of claim 1, wherein the intermediate block (2212) is provided with a transverse rib (2215), the transverse rib (2215) extending along the length direction of the cross beam main body (2211); The two ends of the beam body (2211) are respectively provided with an arc rib (2216), the arc ribs (2216) are located on the periphery of the beam body (2211), one end of each arc rib (2216) is connected to one side, close to the middle block (2212), of the connecting plate (2214), and the other end of each arc rib (2216) is connected to the beam body (2211).
  4. 4. A frame as claimed in claim 3, wherein the outer frame (24) comprises: Two oppositely arranged first frame bodies (241), wherein the first frame bodies (241) are arranged in parallel with the second longitudinal beam (23) and are positioned at the outer side of the first longitudinal beam (11), and two ends of the first frame bodies (241) are respectively connected to two oppositely arranged extension arm bodies (222); Two oppositely arranged second frame bodies (242), wherein the second frame bodies (242) are positioned above the connecting cross beam (22), and two ends of the second frame bodies (242) are respectively connected to the two first frame bodies (241); and the middle frame body (243) is positioned above the second longitudinal beams (23), and two ends of the middle frame body (243) are respectively connected to the two second frame bodies (242).
  5. 5. The frame according to claim 4, wherein a plurality of hanging layers are formed on the inner wall surface of the placing space (21) at intervals, and one hanging layer is used for hanging one battery pack (3); the second longitudinal beam (23), the middle frame body (243) and the inner side of the first frame body (241) are respectively provided with a plurality of hanging plates (245), and a plurality of hanging plates (245) positioned on the same horizontal plane form the hanging layer.
  6. 6. The frame of claim 4, wherein a reinforcement plate (244) is connected between the second frame body (242) and the extension arm body (222), and between the intermediate frame body (243) and the cross member body (2211), respectively.
  7. 7. A cast beam structure optimization method for topologically optimizing a cast beam (221) of the placement frame (2) based on a frame according to any one of claims 1-6, comprising the steps of: s1, making a topological optimization space model of the casting beam (221); s2, setting a limit stress working condition of the frame in a full-load state of the vehicle; s3, performing topology optimization analysis on the topology optimization space model by taking the maximum bearing stress of the casting beam (221) under the limit stress working condition as a constraint condition and taking the mass minimization of the casting beam (221) as an optimization target; and S4, obtaining the cast cross beam (221) under topological optimization and performing strength checking calculation.

Description

Frame and cast beam structure optimization method Technical Field The invention relates to the technical field of electric vehicles, in particular to a frame and a cast cross beam structure optimization method. Background In the pure electric heavy truck vehicle, the more the number of battery packs is set, the longer the endurance mileage of the pure electric heavy truck vehicle. Therefore, how to layout the battery pack in the pure electric heavy truck vehicle becomes one of the effective measures for solving the problem of the endurance mileage. Wherein, the battery package is installed on the frame, and the volume size of each battery package is different. As shown in FIG. 1, the existing frame is of a ladder-type structure, namely, the frame is composed of two parallel longitudinal beams 1 'and a plurality of transverse beams 2', and because other parts such as a suspension frame and the like are required to be installed on the frame and the wheel track is required to be considered, the width between the two longitudinal beams 1 'is usually a fixed value, and because the width between the two longitudinal beams 1' is smaller, a battery pack 3 'with larger volume is difficult to arrange between the two longitudinal beams 1', so that the problem of the vehicle range is not solved. In order to solve the above problems, as shown in fig. 1, the battery pack 3 'is usually hung on the outer side of the longitudinal beam 1', and the space on the outer side of the longitudinal beam 1 'is very limited, which is not beneficial to installing the battery pack 3' with larger volume, and the battery pack 3 'on the outer side of the longitudinal beam 1' affects the aesthetic property of the frame, and the manufacturing cost of the longitudinal beam 1 'is high due to the high rigidity and strength of the longitudinal beam 1'. In view of the above, there is a need for a frame and cast beam structure optimization method to solve the above problems. Disclosure of Invention An object of the present invention is to provide a vehicle frame on which a battery pack having a large volume can be mounted, and on which a plurality of battery packs having different volumes can be mounted, so that the vehicle frame has a good versatility. To achieve the purpose, the invention adopts the following technical scheme: a frame, comprising: the multi-section frame body is arranged at intervals; Place the frame, two adjacent sections be connected with between the frame body place the frame, place the inboard of frame and be formed with a plurality of placing space that are used for placing the battery package, just place the both ends of frame respectively to the outside of frame body extends, so that place the partial structure in space be located the outside of frame body, just place the frame to the length of the outside extension of frame body is adjustable. Further, the frame body includes two first longerons of parallel arrangement, place the frame and include: The connecting cross beam is arranged between the two first longitudinal beams, two ends of the connecting cross beam extend to the outer sides of the first longitudinal beams respectively, and the length of the connecting cross beam is adjustable; The second longitudinal beam is arranged in parallel with the first longitudinal beam and is connected between two adjacent connecting cross beams; The outer frame is connected between two adjacent connecting cross beams and extends to the outer side of the first longitudinal beam, the size of the outer frame is adjustable, and the second longitudinal beam is arranged in the outer frame so as to divide the inner part of the outer frame into a plurality of placing spaces. Further, the connecting beam includes: the second longitudinal beam is connected to the casting cross beam, and two ends of the casting cross beam are respectively connected to the two first longitudinal beams; The casting beam comprises a casting beam body, wherein the casting beam body is arranged on the outer side of the first longitudinal beam, and the length of the casting beam body is adjustable. Further, the cast beam is obtained by adopting topological optimization analysis. Further, the cast beam includes: The beam main body is provided with a middle block in a surrounding mode, the second longitudinal beam is connected to the middle block, connecting plates are respectively arranged at two ends of the beam main body and used for being connected with the first longitudinal beam. Further, the middle block is provided with a transverse rib, and the transverse rib extends along the length direction of the beam main body; the two ends of the beam main body are respectively provided with an arc rib, the arc ribs are positioned on the periphery of part of the beam main body, one end of each arc rib is connected to one side, close to the middle block, of the connecting plate, and the other end of each arc rib is connected to the beam main body. Further, the outer