Vehicle chassis and vehicles

Abstract

This invention provides a vehicle chassis and a vehicle. The vehicle chassis has connecting beams on the left and right sides, and a battery pack located between the connecting beams on both sides. The connecting beams on both sides extend along the longitudinal direction of the vehicle and are respectively positioned below the sill beams on the same side of the vehicle body. The left and right sides of the battery pack are connected to the connecting beams on both sides, and the battery pack contains an internal crossbeam extending along the lateral direction of the vehicle. The projection of the internal crossbeam and the connecting beams on both sides of the battery pack in the lateral direction of the vehicle at least partially overlaps. By using the connecting beams on both sides of the battery pack and the internal crossbeam in the battery pack, this invention increases the battery pack's ability to withstand side impacts, enhances the safety of the battery pack during side impacts, and thus improves the overall safety of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a vehicle chassis. The invention also relates to a vehicle equipped with the aforementioned vehicle chassis. Background Technology

[0002] As the penetration rate of new energy vehicles gradually increases, pure electric and hybrid vehicles equipped with battery packs are becoming increasingly popular among car buyers. Taking pure electric vehicles as an example, the battery pack is generally located under the passenger compartment. In order to provide sufficient range, not only is it necessary to reduce the vehicle weight as much as possible, but it is also necessary to configure a battery pack with a larger size.

[0003] However, while improving the overall vehicle range, the safety of the battery pack in the event of a collision is receiving increasing attention. In current technology, the battery pack located under the passenger compartment generally relies on the sill beams on both sides of the vehicle to withstand the impact of a full-vehicle collision, especially a side impact. However, the structural strength of the sill beams themselves is limited, which affects the battery pack's ability to withstand side impacts and is detrimental to improving the battery pack's collision safety. Summary of the Invention

[0004] In view of this, the present invention aims to provide a vehicle chassis that improves the collision safety of the battery pack.

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

[0006] A vehicle chassis having connecting beams disposed on the left and right sides, and a battery pack located between the two connecting beams;

[0007] Both connecting beams extend along the front-rear direction of the vehicle and are respectively located below the door sill beam on the same side of the vehicle body;

[0008] The battery pack is connected to the connecting beams on both sides on the left and right sides respectively, and the battery pack is provided with an internal crossbeam extending along the left and right direction of the whole vehicle. The projection of the internal crossbeam and the connecting beams on both sides in the left and right direction of the whole vehicle at least partially overlaps.

[0009] Furthermore, the battery pack is provided with connecting brackets on the left and right sides respectively, and each connecting bracket is connected to the lower part of the connecting beam on the same side, and the projection of the internal crossbeam and the connecting brackets on both sides in the left and right direction of the vehicle at least partially overlaps.

[0010] Furthermore, the battery pack has side frames on both the left and right sides, and the connecting brackets on each side are connected to the side frames on the same side. The internal crossbeam is connected between the side frames on both sides.

[0011] At least one of the side frame, the connecting bracket, and the internal crossbeam is made of extruded aluminum profile.

[0012] Furthermore, the vehicle chassis has a front subframe located at the front of the vehicle and a rear subframe located at the rear of the vehicle, with the connecting beams on both sides connecting the front subframe and the rear subframe.

[0013] The front subframe is located below the front engine compartment in the vehicle body, and the rear subframe is located below the rear floor in the vehicle body. The front subframe, the rear subframe, and the connecting beams on both sides form a battery pack installation space to accommodate the battery pack.

[0014] Furthermore, the front subframe has front subframe longitudinal beams located on the left and right sides, and the rear subframe has rear subframe longitudinal beams located on the left and right sides.

[0015] In the left-right direction of the vehicle, the connecting beams on each side are located on the side of the front subframe longitudinal beam and the rear subframe longitudinal beam that are closer to the outside of the vehicle.

[0016] Furthermore, a front crossbeam is provided on the rear side of the front subframe, the front crossbeam has a crossbeam body, and both the left and right ends of the crossbeam body are connected to an extension section.

[0017] The extended section extends outward along the left-right direction of the vehicle, and the longitudinal beams of the front subframe on both sides are connected to the main body of the crossbeam. The connecting beams on both sides are respectively connected to the extended section on the corresponding side, and are connected to each of the longitudinal beams of the front subframe through the front crossbeam.

[0018] Furthermore, each of the connecting beams on each side has an inclined connecting section at its rear end. Each of the connecting beams on each side is connected to the front end of the longitudinal beam of the rear subframe on the same side through the connecting section. In the longitudinal direction of the whole vehicle, the distance between the connecting sections on both sides gradually decreases from front to back.

[0019] A rear crossbeam is connected between the rear subframe longitudinal beams on both sides and the connecting section, and the battery pack installation space is formed between the front crossbeam, the rear crossbeam and the connecting beams on both sides.

[0020] Furthermore, the connecting beams on both sides are integrally formed; and / or,

[0021] The length of the connecting beams on both sides is adjustable along the front-rear direction of the vehicle, and each of the connecting beams on both sides is provided with a fixing structure for fixing the length of the connecting beam after adjustment.

[0022] Furthermore, in the left-right direction of the vehicle, each side of the connecting beam is connected to a side step mounting plate on the side facing outward. The side step mounting plate extends along the front-rear direction of the vehicle and has a side step mounting surface on its top.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The vehicle chassis described in this invention, through the connecting beams on both sides of the battery pack and the internal crossbeams inside the battery pack, allows the side connecting beams to collapse and absorb energy during a side collision, and to transmit and disperse the collision force. At the same time, the internal crossbeams inside the battery pack also provide support, protecting the modules inside the battery pack from stress. This increases the battery pack's ability to withstand side collisions, enhances the safety of the battery pack during a side collision, and helps improve the overall safety quality of the vehicle.

[0025] Furthermore, the left and right sides of the battery pack are connected to the connecting beam below via connecting brackets, facilitating the connection and installation of the battery pack. The overlapping projection of the internal crossbeam and the connecting bracket provides better support for the internal crossbeam while ensuring the strength of the side connecting bracket arrangement, thus increasing the reliability of the battery pack assembly. The connecting bracket is connected to the side frame, and the internal crossbeam is located between the two side frames. The side frames, connecting brackets, and internal crossbeam are all made of extruded aluminum profiles, which facilitates the installation of the connecting bracket on the battery pack while ensuring the structural strength of the side frames, connecting brackets, and internal crossbeams, thus guaranteeing the overall rigidity of the battery pack.

[0026] The connecting beams on both sides connect the front and rear subframes, and the front subframe, rear subframe, and connecting beams on both sides together define the battery pack installation space. This structure has the characteristics of a monocoque body structure, which can take advantage of the lighter weight of the monocoque body to achieve vehicle weight reduction and improve the overall vehicle range. At the same time, the connecting beams on both sides form a ring frame structure for the battery pack. In the event of a collision, the battery pack can move with the ring frame structure, thereby reducing the impact on the battery pack and increasing its collision safety.

[0027] Secondly, the connecting beams on each side are located on the same side of the front subframe longitudinal beam and the rear subframe longitudinal beam, closer to the outside of the vehicle. This facilitates the Y-direction cross-section variation of the front and rear parts of the monocoque body, meeting the matching design requirements between the chassis and the body frame in a monocoque body. The front crossbeam located behind the front subframe, connecting the connecting beams to the longitudinal beams of each front subframe via the front crossbeam, facilitates the connection between the connecting beams and the front subframe, and also allows for easy variation of the Y-direction cross-section at the front of the vehicle body.

[0028] The inclined connecting sections at the rear ends of the connecting beams on each side facilitate connection with the longitudinal beams of the rear subframe. The distance between the connecting sections gradually decreases from front to rear, which helps to achieve a Y-axis cross-sectional change at the rear of the monocoque body, meeting the matching design requirements between the chassis and body frame in a monocoque body. The rear crossbeam not only increases the structural strength and rigidity of the front of the rear subframe and provides a mounting point for the rear of the battery pack, but also creates a battery pack mounting space between the front crossbeam, rear crossbeam, and the connecting beams on both sides. This also helps to make the resulting ring-shaped frame structure a rigid, enveloping structure, thereby improving the battery pack's collision safety.

[0029] Furthermore, the integral molding of the connecting beams facilitates their fabrication and ensures their structural strength. The adjustable length of the connecting beams on both sides, along with a fixing structure to maintain their length, allows for variations in wheelbase across different vehicle models. This makes the front and rear subframes common components, facilitating platform-based design and reducing overall vehicle development costs.

[0030] By connecting the side step mounting plate to the outside of the connecting beam, it can serve as both a base for side step assembly and a side collision energy absorption structure, thus achieving a dual-purpose design. This saves on the side step mounting frame and facilitates lightweight vehicle body design.

[0031] Another object of the present invention is to provide a vehicle having a vehicle chassis as described above.

[0032] The vehicle described in this invention has the same beneficial effects as the aforementioned chassis, and will not be repeated here. Attached Figure Description

[0033] 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:

[0034] Figure 1 This is a schematic diagram of the vehicle chassis structure as described in an embodiment of the present invention being assembled in the vehicle body;

[0035] Figure 2 This is a schematic diagram of the vehicle chassis structure described in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the battery pack structure according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram illustrating the arrangement of the internal crossbeam according to an embodiment of the present invention;

[0038] Figure 5This is a schematic diagram illustrating the cooperation of the internal crossbeam, connecting bracket, and connecting beam according to an embodiment of the present invention;

[0039] Figure 6 This is a connection diagram of the first connector according to an embodiment of the present invention;

[0040] Figure 7 This is a connection diagram of the second connector according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram illustrating the structure of the battery pack installation space according to an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the front subframe structure according to an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of the rear subframe structure according to an embodiment of the present invention;

[0044] Figure 11 This is a schematic cross-sectional view of the connecting beam described in an embodiment of the present invention;

[0045] Figure 12 This is a schematic diagram of the structure of the rear crossbeam according to an embodiment of the present invention;

[0046] Figure 13 This is a schematic diagram of the structure of the rear subframe anti-collision beam and the rear subframe energy-absorbing box according to an embodiment of the present invention;

[0047] Figure 14 This is a schematic diagram illustrating the installation of the side step mounting plate according to an embodiment of the present invention;

[0048] Figure 15 for Figure 14 A schematic diagram of the middle section structure;

[0049] Figure 16 This is a schematic diagram of the structure of the side step mounting plate and connecting beam made of extruded aluminum according to an embodiment of the present invention;

[0050] Figure 17 This is a schematic diagram of the structure of the side step mounting plate and connecting beam using a steel roll forming structure, as described in an embodiment of the present invention.

[0051] Figure 18 This is a schematic diagram of the connecting beam length adjustment structure according to an embodiment of the present invention;

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Connecting beam; 2. Battery pack; 3. Sill beam; 4. Front subframe; 5. Rear subframe; 6. Side step mounting plate;

[0054] 1a. Connecting section; 1b. Transverse reinforcing rib; 1c. Longitudinal beam segment; 1d. Fixing structure; 201. Connecting bracket; 202. Internal crossbeam; 203. Side frame; 401. Front subframe longitudinal beam; 402. Front subframe front crossbeam; 403. Front subframe middle crossbeam; 404. Front crossbeam; 404a. Crossbeam body; 404b. Extended section; 405. Front subframe anti-collision beam; 406. Front subframe energy-absorbing box; 501. Rear subframe longitudinal beam; 502. Rear subframe front crossbeam; 503. Rear subframe rear crossbeam; 504. Rear crossbeam; 5041. Straight section; 5042. Bending section; 505. Rear subframe anti-collision beam; 506. Rear subframe energy-absorbing box; 6a. Side step mounting surface; 6b. Collapse guide rib; 6c. Vertical reinforcing rib;

[0055] 100. Threaded pipe; 200. First connector; 300. Threaded sleeve; 400. Second connector;

[0056] A. Length adjustment position; B. Longitudinal beam connection position; Q. Battery pack installation space; m. Second connector connection position; n. First connector connection position. Detailed Implementation

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0058] 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.

[0059] 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.

[0060] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0061] Example 1

[0062] This embodiment relates to a vehicle chassis that is applied to new energy vehicle models with battery packs, preferably pure electric vehicles. The vehicle chassis can increase the battery pack's ability to withstand side collisions, thereby increasing the safety of the battery pack in the event of a side collision.

[0063] In terms of overall structure, combined Figures 1 to 5 As shown, the vehicle chassis of this embodiment has connecting beams 1 on the left and right sides, and a battery pack 2 located between the connecting beams 1 on both sides.

[0064] The two connecting beams 1 extend along the front-rear direction of the vehicle and are respectively located below the door sill beams 3 on the same side of the vehicle body. The left and right sides of the battery pack 2 are connected to the two connecting beams 1 respectively, and an internal crossbeam 202 extending along the left-right direction of the vehicle is provided inside the battery pack 2. The projection of the internal crossbeam 202 and the two connecting beams 1 in the left-right direction of the vehicle at least partially overlaps.

[0065] At this time, as set up as above, through the connecting beams 1 on both sides of the battery pack 2 and the internal crossbeams 202 in the battery pack 2, when the vehicle is involved in a side collision, the connecting beams 1 on the side can collapse and absorb energy, and can transmit and disperse the collision force. At the same time, the internal crossbeams 202 inside the battery pack 2 can also provide support and protect the modules inside the battery pack 2 from force. Thus, this embodiment can increase the ability of the battery pack 2 to cope with side collisions and achieve the effect of increasing the side collision safety of the battery pack 2.

[0066] Based on the above overview, specifically, it remains as follows: Figures 2 to 5 As shown in the figure, in a preferred embodiment, the internal crossbeams 202 located in the battery pack 2 can be configured as multiple beams arranged at intervals. At the same time, in this embodiment, connecting brackets 201 are respectively provided on the left and right sides of the battery pack 2. Each side connecting bracket 201 is connected to the lower part of the connecting beam 1 on the same side, so as to realize the connection between the side of the battery pack 2 and the connecting beam 1. Meanwhile, the internal crossbeams 202 in the battery pack 2 also at least partially overlap with the projection of the connecting brackets 201 on both sides in the left and right direction of the vehicle.

[0067] It is understandable that by setting connecting brackets 201 on both sides of the battery pack 2, and connecting each side connecting bracket 201 to the bottom of the connecting beam 1 via connectors, the connection between the battery pack 2 and the connecting beam 1 can be easily achieved. Furthermore, by ensuring that the internal crossbeam 202 in the battery pack 2 also overlaps with the projection of the connecting bracket 201 in the left-right direction of the vehicle, the internal crossbeam 202 can provide better support while also ensuring the arrangement strength of the side connecting brackets 201, thereby increasing the reliability of the battery pack 2 assembly.

[0068] In this embodiment, as a preferred implementation, the battery pack 2 has side frames 203 on both the left and right sides. The connecting brackets 201 located on the left and right sides of the battery pack 2 are fixed to the corresponding side frames 203. At the same time, the internal crossbeams 202 are connected between the side frames 203 on both sides. Preferably, the side frames 203, connecting brackets 201 and internal crossbeams 202 can all be made of extruded aluminum profiles.

[0069] Therefore, it can be understood that by connecting the side brackets 201 to the side frame 203 on the same side, and by placing the internal crossbeam 202 between the side frames 203 on both sides, and by using extruded aluminum profiles for the side frame 203, the connecting brackets 201, and the internal crossbeam 202, it is possible not only to facilitate the installation of the connecting brackets 201 on the battery pack 2, but also to ensure the structural strength of the side frame 203, the connecting brackets 201, and the internal crossbeam 202, thus helping to ensure the overall rigidity of the battery pack 2.

[0070] It should be noted that when both the side frame 203 and the connecting bracket 201 are made of extruded aluminum profiles, preferably, the connecting bracket 201 and the side frame 203 can also be integrally formed. This facilitates the fabrication of the connecting bracket 201 and the side frame 203, while also ensuring the structural strength of the connecting bracket 201 and the side frame 203, thus guaranteeing the reliability of the battery pack 2 after assembly.

[0071] Furthermore, it should be noted that in addition to the side frames 203 on both sides, similar frame structures are also provided at the front and rear ends of the battery pack 2, and these front and rear frame structures can generally be made of extruded aluminum profiles. In specific implementation, however, it is still as follows... Figure 5 As shown, the side frame 203 can also be configured to have a triangular cross section, so as to take advantage of the high strength of the triangular structure and better increase the strength of the side frame 203.

[0072] In addition to using extruded aluminum profiles for the side frame 203, connecting bracket 201 and internal crossbeam 202, it should be noted that, in specific implementations, depending on design requirements, it is also possible for a portion of the side frame 203, connecting bracket 201 and internal crossbeam 202 to be made of extruded aluminum profiles.

[0073] In addition, in this embodiment, besides connecting the internal crossbeam 202 and the connecting bracket 201 together through the side frame 203, in specific implementation, it is also feasible to make the end of the internal crossbeam 202 pass through the side frame 203 and be directly connected to the connecting bracket 201, as long as it can ensure that the projection between the internal crossbeam 202 and the two side connecting brackets 201 at least partially overlaps.

[0074] In this embodiment, based on the setting of the connecting brackets 201 on the left and right sides of the battery pack 2, in specific implementation, each side connecting bracket 201 can generally be connected to the lower part of the connecting beam 1 on the same side through a connector to realize the assembly of the battery pack 2, and the aforementioned connector can be connected to the threaded sleeve set in the connecting beam 1.

[0075] In this embodiment, the aforementioned connector may be, for example, made by... Figure 6 The first connector 200 and Figure 7 The second connector 400 is formed, and correspondingly, the threaded sleeve provided in the connecting beam 1 corresponding to the first connector 200 can be called the first threaded sleeve 100, and the threaded sleeve provided in the connecting beam 1 corresponding to the second connector 400 can be called the second threaded sleeve 300. Moreover, the top of the second threaded sleeve 300 is also configured to extend out of the connecting beam 1 and is arranged correspondingly to the battery pack mounting structure provided in the sill beam 3.

[0076] Through the cooperation of the first connector 200 and the first threaded sleeve 100, the battery pack 2 and the connecting beam 1 can be connected together in this embodiment. At the same time, through the second connector 400 passing through the second threaded sleeve 300 and connecting to the battery pack mounting structure in the sill beam 3, this embodiment can connect the battery pack 2, the connecting beam 1 and the sill beam 3 together.

[0077] In this way, the second connector 400 can connect the battery pack 2, the connecting beam 1, and the sill beam 3 together. This embodiment can simultaneously achieve the installation of the battery pack 2 and the overall structure formed by the connecting beams 1 on both sides of the battery pack 2 within the vehicle body, thus realizing an integrated design for the battery pack 2 installation structure. Using this integrated design, it is unnecessary to separately set up connection structures between the connecting beams 1 on both sides of the battery pack 2 and the vehicle body, thereby reducing the overall vehicle installation cost.

[0078] In this embodiment, it should be noted that, as a preferred implementation, the second connecting member 400 connecting the battery pack 2, the connecting beam 1, and the sill beam 3 is generally distributed at the four front and rear corners near the battery pack 2, that is, the second connecting member 400 on each side is arranged in... Figure 2 The location indicated by the label m shown. For the first connector 200 that connects only the battery pack 2 and the connecting beam 1, it can be configured as a plurality of spaced-apart components, and for example, can be arranged separately in... Figure 2 The position indicated by the number n.

[0079] Furthermore, in practical implementation, the aforementioned first threaded pipe 100 or second threaded sleeve 300 can both adopt existing pipe structures with connecting threads formed on the inner wall, and the aforementioned first connector 200 and second connector 400 can use bolts of appropriate length. The battery pack mounting structure set in the sill beam 3 can adopt projection welded nuts or similar structures to achieve a screw connection with the second connector 400.

[0080] In this embodiment, as a feasible implementation, the front and rear ends of each side connecting beam 1 can be connected to the same side sill beam 3, and the connection can be made by welding, screwing, or riveting. In this way, connecting the front and rear ends of the connecting beam 1 to the sill beam 3 enables the installation of the two side connecting beams 1 in the vehicle body and ensures the reliability of the connecting beams 1 within the vehicle body.

[0081] Besides connecting the two ends of the connecting beams 1 on each side to the threshold beams 3 on the same side, another feasible implementation is still... Figure 2 and combined Figure 8 As shown, the vehicle chassis of this embodiment also has a front subframe 4 located at the front of the vehicle and a rear subframe 5 located at the rear of the vehicle, and the two side connecting beams 1 are also connected between the front subframe 4 and the rear subframe 5.

[0082] The aforementioned front subframe 4 is located below the front engine compartment in the vehicle body, and the rear subframe 5 is located below the rear floor in the vehicle body. At the same time, the aforementioned front subframe 4, rear subframe 5, and the connecting beams 1 on both sides also form a battery pack installation space Q that accommodates the aforementioned battery pack 2.

[0083] At this point, based on the above, the connecting beams 1 on both sides are set between the front and rear subframes. It should be noted that the existing traditional body mainly includes the monocoque body and the non-monocoque body, and the difference between the two is mainly in terms of structure, weight and ride comfort.

[0084] A non-load-bearing chassis typically consists of two parts: a frame beam and a body. The frame mounts components such as the engine, transmission, and suspension, while the body only provides a closed environment for passengers and does not bear loads. Non-load-bearing chassis are also heavier, have a higher center of gravity, and offer relatively poor handling and lower comfort on paved roads. However, the frame beam provides excellent rigidity and chassis strength, resulting in good shock absorption, stability, and safety. Furthermore, they are easier to modify.

[0085] Unibody construction lacks a rigid frame; all vehicle components are directly mounted to the body, which acts as the load-bearing structure, absorbing various forces. Unibody construction is also lighter, has a lower center of gravity, offers better handling, is easier to assemble, and provides greater comfort on paved roads. However, unibody construction has weaker torsional rigidity and load-bearing capacity. Furthermore, due to the lack of a rigid frame, reinforcement is typically limited to the front, sides, rear, and floor, resulting in relatively lower overall safety.

[0086] Therefore, for new energy vehicles, especially pure electric vehicles, in order to fully utilize the advantages of the monocoque body and improve the shortcomings of the monocoque body, this embodiment creatively connects the two side connecting beams 1 between the front and rear subframes in the vehicle chassis structure, thus making the vehicle chassis of this embodiment a chassis structure developed based on the monocoque body.

[0087] Understandably, by adopting a monocoque body structure with front and rear subframes, this embodiment can leverage the lower weight of the monocoque body to achieve vehicle lightweighting, thereby improving the overall vehicle range. Simultaneously, the connecting beams 1 on both sides connect the front and rear subframes into a single unit. The front subframe 4, rear subframe 5, and the connecting beams 1 on both sides together define the battery pack installation space Q. Through the connection of the connecting beams 1, a ring-shaped frame structure for the battery pack can also be formed, allowing the battery pack 2 to move along with the ring-shaped frame structure during a vehicle collision. This reduces the impact on the battery pack 2 during a collision, thereby increasing the collision safety of the battery pack 2.

[0088] In this embodiment, the front subframe 4 has front subframe longitudinal beams 401 disposed on the left and right sides, and the rear subframe 5 has rear subframe longitudinal beams 501 disposed on the left and right sides. In a preferred embodiment, in the left-right direction of the whole vehicle, the connecting beams 1 on each side are also located on the side of the front subframe longitudinal beam 401 and the rear subframe longitudinal beam 501 closer to the outside of the vehicle.

[0089] At this point, the connecting beams 1 on each side are as follows: Figure 2 as well as Figure 8 As shown, the front subframe longitudinal beam 401 and the rear subframe longitudinal beam 501 located on the same side near the outside of the vehicle, in this embodiment, help to achieve the Y-direction cross-sectional change of the front and rear parts of the monocoque body, and can meet the matching design requirements between the chassis and the body frame in the monocoque body.

[0090] Furthermore, in this embodiment, a front crossbeam 404 is also provided at the rear of the front subframe 4. The front ends of the connecting beams 1 on both sides are connected to the left and right ends of the front crossbeam 404, respectively, and the rear ends of the connecting beams 1 on both sides are specifically connected to the front ends of the longitudinal beams 501 of the rear subframe on both sides. In this way, the aforementioned front crossbeam 404, rear subframe 5, and connecting beams 1 on both sides together define the battery pack installation space Q for installing the battery pack 2.

[0091] It should be noted that, as a preferred embodiment, the aforementioned front crossbeam 404 can, for example, be part of the front subframe 4, specifically a rear crossbeam of the front subframe located at the rear end of the front subframe 4. However, besides serving as a rear crossbeam of the front subframe, the front crossbeam 404 in this embodiment can also be connected between the front ends of the two connecting beams 1 and be independent of the beam structure of the front subframe 4. In this case, while the front crossbeam 404 is integrated with the two connecting beams 1 to form an integral frame structure, it is also connected to the front subframe 4 to achieve the connection between the two connecting beams 1 and the front subframe 4.

[0092] Taking the previous example of the crossbeam 404 being the rear crossbeam of the front subframe, in specific implementation, the front subframe 4 in this embodiment can be derived from the front subframe structure in existing monocoque chassis. Generally speaking, such as... Figure 9 As shown, the front subframe 4 has front subframe longitudinal beams 401 on the left and right sides respectively. The front subframe front crossbeam 402 and the front subframe middle crossbeam 403 are connected between the two front subframe longitudinal beams 401, and the rear ends of the two front subframe longitudinal beams 401 are connected to the front crossbeam 404, which serves as the rear crossbeam of the front subframe.

[0093] It should be noted that when the front crossbeam 404 is set independently of the front subframe 4, its connection to the front subframe 4 is generally also connected to the rear end of the longitudinal beams 401 of the front subframe on both sides. Moreover, when the front crossbeam 404 is set independently of the front subframe 4, the rear crossbeams of the front subframe 4 can be selectively set as needed.

[0094] Continue as Figure 9 As shown, in this embodiment, a front subframe anti-collision beam 405 is also provided at the front end of the front subframe 4, which is connected to the longitudinal beams 401 of the front subframe on both sides. The front subframe anti-collision beam 405 is specifically connected to the front end of the longitudinal beams 401 of the front subframe on both sides through the front subframe energy absorption box 406.

[0095] Furthermore, as a preferred embodiment, in the front subframe 4 of this embodiment, the front crossbeam 404 also structurally includes a central crossbeam body 404a and extension sections 404b connected to the left and right ends of the crossbeam body 404a. The rear ends of the longitudinal beams 401 of each side of the front subframe are connected to the crossbeam body 404a, and the extension sections 404b at each end extend outwards along the left-right direction of the vehicle. The front ends of the connecting beams 1 on each side are also specifically connected to the extension sections 404b on the same side, thereby achieving connection between the front crossbeam 404 and the longitudinal beams 401 of each front subframe.

[0096] It is understandable that the extension section 404a in the front crossbeam 404 facilitates the connection with the connecting beams 1 on both sides. Meanwhile, see also... Figure 8 By connecting the longitudinal beams 401 of the front subframe on the left and right sides of the front subframe 4 with the main body 404a of the crossbeam in the front crossbeam 404, it also helps to realize the Y-direction (left-right direction of the whole vehicle) cross section change of the front of the load-bearing body. That is, the connecting beams 1 on each side and the longitudinal beams 401 of the front subframe are not on the same straight line, but are bent at the connection point between the two, thereby making the Y-direction cross section size of the body at the front subframe 4 smaller.

[0097] The aforementioned change in the Y-direction section of the front of the vehicle body is fundamentally different from the fact that the Y-direction section of the frame beam in a non-load-bearing vehicle body is basically the same front and back. Moreover, this embodiment satisfies the matching design requirements between the chassis and the body frame in a load-bearing vehicle body by changing the size of the aforementioned Y-direction section of the front of the vehicle body.

[0098] In this embodiment, it is still combined with Figure 8 and Figure 10 As shown, in a preferred embodiment, each side connecting beam 1 has an inclined connecting section 1a at its rear end. Each side connecting section 1a is connected to the front end of the rear subframe longitudinal beam 501 on the same side through the connecting section 1a. Furthermore, the distance between the two connecting sections 1a gradually decreases from front to back in the front-rear direction of the vehicle.

[0099] At this point, by setting an inclined connecting section 1a at the rear end of each side connecting beam 1, it is also possible to facilitate the connection between the connecting beam 1 and the rear subframe longitudinal beam 501. Furthermore, the distance between the two connecting sections 1a is set to gradually decrease from front to back. Similar to the design of the aforementioned extended section 404b, it is also possible to realize the Y-direction section change of the rear of the load-bearing body, so as not only to meet the matching design requirements between the chassis and the body frame in the load-bearing body, but also to become one of the main differences from the non-load-bearing body.

[0100] In this embodiment, it is worth noting that, in specific implementation, the connecting beams 1 on both sides can be, for example, an integrally formed beam structure, specifically an integral closed structure, and its cross-section can be as follows: Figure 11 As shown in the diagram. Furthermore, at this time, the connecting beam 1 can also be integrally formed with the front crossbeam 404 and the rear subframe longitudinal beam 501 in the front and rear subframes. It can be understood that by utilizing the closed section, the structural strength of the connecting beam 1 can be guaranteed by leveraging the high strength of the cavity structure. Furthermore, by integrally forming the connecting beam 1 with the front and rear subframes, the front subframe 4, connecting beam 1, and rear subframe 5, after being connected as a single unit, can have better structural strength and rigidity.

[0101] Of course, besides being a one-piece structure, the connecting beam 1 in this embodiment can also adopt other structures, such as a welded steel profile structure, an extruded aluminum alloy profile structure, etc. Furthermore, in addition to being integrally connected to the front crossbeam 404 and the rear subframe longitudinal beam 501, in specific implementations, the connecting beam 1 can also be detachable. In this case, the aforementioned detachable method can generally adopt a bolted structure, and combined with... Figure 15 As shown, the connection point can be located at point B near one of the four corners, and the connection direction can be X (front and rear of the vehicle) or Y. The connection method can be plug-in or flat docking.

[0102] Of course, to ensure the reliability of force transmission in connecting beam 1, the preferred connection direction is the X-direction. Furthermore, to ensure ease of operation, a flat plate butt joint connection is preferred. Thus, in Figure 15 The positions indicated by each label B can be connected by bolted structures along the X direction using a flat plate butt joint method to set up the connecting beams 1 on each side.

[0103] In this embodiment, see continue to refer to Figure 8 as well as Figure 10 As shown, in specific implementation, the rear subframe 5 can also refer to the rear subframe structure in the existing load-bearing body. In terms of structure, as a preferred implementation, in addition to being similar to the existing rear subframe structure, the rear subframe front crossbeam 502 and the rear subframe rear crossbeam 503 are connected between the rear subframe longitudinal beams 501 on both sides. Furthermore, at the position where the rear subframe longitudinal beams 501 on both sides are connected to the connecting beam 1, that is, at the position where the rear subframe longitudinal beams 501 on both sides are connected to the connecting section 1a, a rear crossbeam 504 is also connected.

[0104] At this point, based on the arrangement of the rear crossbeam 504, the aforementioned battery pack installation space Q is formed between the rear crossbeam 504, the front crossbeam 404, and the connecting beams 1 on both sides. Moreover, based on the arrangement of the front crossbeam 404 and the rear crossbeam 504, in specific implementation, battery pack installation points can be set on the front crossbeam 404 and the rear crossbeam 504 respectively. At the same time, mounting brackets are set at both ends of the battery pack 2, so that the front end of the battery pack 2 can be bolted to the front crossbeam 404, and the rear end of the battery pack 2 can also be bolted to the rear crossbeam 504, thus ensuring the stability of the battery pack 2 after assembly in the vehicle body.

[0105] It is understandable that by setting the rear crossbeam 504 as described above, not only can the structural strength and rigidity of the front of the rear subframe 5 be increased, and a mounting point for the rear of the battery pack be provided, but also, by making the battery pack mounting space Q form between the rear crossbeam 504, the front crossbeam 404 and the connecting beams 1 on both sides, this embodiment also helps to make the formed ring frame structure a rigid encircling structure that is adapted to the shape of the battery pack, thereby better improving the collision safety of the battery pack.

[0106] In addition, the rear crossbeam 504 is positioned between the connection points of the two side connecting sections 1a and the rear subframe longitudinal beam 501. By connecting the end of the rear crossbeam 504 to the connection points between the connecting sections 1a on each side and the rear subframe longitudinal beam 501, it not only helps to ensure the connection strength of the rear crossbeam 504, but also helps to better improve the dynamic stiffness of the front part of the rear subframe 5.

[0107] In specific implementations, the rear crossbeam 504 of this embodiment can, for example, adopt an integrally molded closed structure to achieve higher structural strength. Furthermore, to further increase the strength of the rear crossbeam 504, and for ease of rear-end battery pack installation, combined with... Figure 12 As shown, the rear crossbeam 504 in this embodiment can be designed to be arched downwards along the vertical direction of the vehicle, and has a straight section 5041 in the middle and bent sections 5042 on the left and right sides. The bent sections 5042 on both sides are inclined upwards and are connected to the rear subframe longitudinal beam 501 on the same side.

[0108] Still by Figure 8 and Figure 10As shown, in a preferred embodiment, unlike existing rear subframe structures, this embodiment provides a rear subframe anti-collision beam 505 at the rear end of the rear subframe 5, connected to the longitudinal beams 501 of the two rear subframes. Thus, it can be understood that by providing the rear subframe anti-collision beam 505 at the rear end of the rear subframe 5, on the one hand, it improves the rear impact force transmission performance of the rear subframe 5, allowing the collision force to be better dispersed to the longitudinal beams 501 of the two rear subframes via the rear subframe anti-collision beam 505, so as to transmit it forward along the longitudinal beams 501, avoiding single-position force, difficulty in dispersing the collision force, and excessive deformation. On the other hand, by providing the aforementioned rear subframe anti-collision beam 505, it also serves as a pedestrian anti-intrusion beam at the rear of the vehicle, thereby improving safety during reversing.

[0109] It should be noted that, in specific implementation, it should be combined with Figure 13 As shown, the aforementioned rear subframe anti-collision beam 505 can structurally borrow from the front subframe anti-collision beam 405 in the front subframe 4, and it can be made of sheet metal stamping structure or aluminum alloy extruded profile. Furthermore, based on the aforementioned rear subframe anti-collision beam 505, preferably, the rear ends of the longitudinal beams 501 on both sides of the rear subframe can also be connected to the rear subframe energy-absorbing boxes 506, so that the rear subframe anti-collision beam 505 is specifically connected to the energy-absorbing boxes 506 on both sides of the rear subframe.

[0110] At this point, the aforementioned rear subframe energy-absorbing box 506, like the front subframe energy-absorbing box 406 in the front subframe 4, can adopt the conventional energy-absorbing box structure used in existing vehicle bodies. Furthermore, it is understandable that by connecting the rear subframe rear bumper beam 505 to the rear subframe longitudinal beam 501 via the rear subframe energy-absorbing box 506, it can absorb energy through crumple zones, thereby further improving the vehicle's rear-end collision safety.

[0111] In addition, it should be noted that the aforementioned rear subframe anti-collision beam 505 not only works in conjunction with the front subframe anti-collision beam 405 to improve the frontal and rear collision safety performance of the chassis structure in this embodiment, but also, when the chassis structure of this embodiment is assembled into the vehicle, the aforementioned front subframe anti-collision beam 405 and rear subframe anti-collision beam 505 can form a double anti-collision beam collision force transmission design together with the front and rear anti-collision beams in the upper body frame, thereby providing a super strong double protection effect.

[0112] like Figure 14 and Figure 15 As shown in the illustration, in this preferred embodiment, the side connecting beam 1 facing outwards in the left-right direction of the vehicle can be further connected to a side step mounting plate 6. The side step mounting plate 6 extends along the front-rear direction of the vehicle, and a side step mounting surface 6a is provided on the top of each side step mounting plate 6.

[0113] At this point, by installing a side step panel and side step trim on the side step mounting surface 6a, a side step that assists the driver and passengers in getting in and out of the vehicle can be formed. Furthermore, by connecting the aforementioned side step mounting plate 6 to the outside of the connecting beam 1, it can be understood that it serves as both a base for side step assembly and a side impact energy-absorbing structure, thus achieving a dual-purpose design, saving on the side step mounting frame, and also contributing to the lightweight design of the vehicle body.

[0114] In practice, it should be noted that the side tread mounting plates 6 on each side can be detachably connected to the connecting beam 1 on the same side via connecting components. This allows the side tread mounting plates 6 to be detachably connected to the connecting beam 1 on the same side via connecting components, which facilitates the assembly of the side tread mounting plates 6 and also makes it easier to maintain and replace them later.

[0115] Of course, in addition to the above-mentioned detachable configuration, in specific implementations, this embodiment can also make the side step mounting plates 6 on each side integrally formed with the connecting beam 1 on the same side. In this way, the side step mounting plates 6 and the connecting beam 1 are integrally formed, which can reduce the manufacturing cost of the connecting beam 1 and the side step mounting plates 6, and can also better ensure the structural strength of the connecting beam 1 and the side step mounting plates 6, so as to improve the overall rigidity of the chassis structure.

[0116] The detachable side step mounting plate 6 can be made of steel or aluminum alloy profiles, and the connecting components can typically be bolted to secure the side step mounting plate 6 to the connecting beam 1. Alternatively, the side step mounting plate 6 and the connecting beam 1 can be integrally formed, for example, both can be made of steel or aluminum alloy profiles, or they can be made of rolled steel.

[0117] like Figure 16 As shown, this is an exemplary structure when both the side step mounting plate 6 and the connecting beam 1 are made of aluminum alloy profiles. In this structure, to increase the structural strength of the connecting beam 1 and the side step mounting plate 6, transverse reinforcing ribs 1b and vertical reinforcing ribs 6c can be provided in both. Simultaneously, to improve the collision energy absorption effect of the side step mounting plate 6 during a side collision, a collapsible guide rib 6b extending in a bent shape can also be provided at the bottom of the side step mounting plate 6.

[0118] At this time, vertical reinforcing ribs 6c and crash guide ribs 6b are used for the reinforcing ribs at the side step mounting plate 6. While appropriately increasing the structural strength at the position of the side step mounting plate 6, it also enables the side step mounting plate 6 to have good crash energy absorption ability, so that one side of the side step mounting plate 6 becomes a crash energy absorption area, which helps to improve the side collision energy absorption effect. Different from one side of the side step mounting plate 6, on one side of the connecting beam 1, through the arrangement of the transverse reinforcing rib 1b, by utilizing the transverse supporting effect of the transverse reinforcing rib 1b, the connecting beam 1 can have strong supporting stiffness when the vehicle has a side collision, and then one side of the connecting beam 1 can become a rigid frame area to better protect the battery pack located in the battery pack installation space Q.

[0119] In this embodiment, in addition to as Figure 16 shown, the integrally formed connecting beam 1 and side step mounting plate 6 have different cross-sectional structures. Of course, in specific implementation, the wall thickness on one side of the connecting beam 1 can also be made greater than that on one side of the side step mounting plate 6. In this way, the strength on one side of the connecting beam 1 can be further increased to make full use of the crash energy absorption on one side of the side step mounting plate 6 to protect the battery pack inside the connecting beam 1.

[0120] Such as Figure 17 shown is an exemplary cross-sectional form when the above-mentioned side step mounting plate 6 and connecting beam 1 adopt a steel rolling structure. It should be noted that when adopting the rolling structure, the integrally formed side step mounting plate 6 and connecting beam 1 generally adopt the Figure 17 shown "day" - shaped cross-section and can be connected by combining laser welding and spot welding. However, in addition to adopting the "day" - shaped cross-section, of course, it is also possible to make the rolled side step mounting plate 6 and connecting beam 1 adopt other cross-sectional forms.

[0121] In this embodiment, based on the arrangement of the two connecting beams 1, in addition to making the two connecting beams 1 an integral structure, as a preferred implementation form, it can also be set so that the lengths of the two connecting beams 1 along the front - rear direction of the whole vehicle are adjustable, and fixing structures 1d are respectively arranged on the two connecting beams 1 to fix the adjusted lengths of the connecting beams 1 through the fixing structures 1d. At this time, by making the lengths of the two connecting beams 1 adjustable and setting the fixing structure for fixing the length of the connecting beam 1, it can facilitate meeting the wheelbase changes between different vehicle models, and make the front and rear subframes become common parts, thus helping to achieve platform design to reduce the vehicle development cost.

[0122] During specific implementation, the length adjustment positions of the two connecting beams 1 can be as indicated by the reference numeral A in Figure 1 , and, as Figure 18As shown, in order to make the length of the connecting beam 1 adjustable, for example, the two longitudinal beam segments 1c that are broken at position A can be connected by a plug-in method. At the same time, the above-mentioned fixing structure 1d can be fixed by a threaded sleeve and bolt.

[0123] The threaded sleeve can be fixed within one of the longitudinal beam segments 1c, and connection through holes are provided on both longitudinal beam segments 1c, with multiple connection through holes spaced apart on the outer longitudinal beam segment 1c. When adjusting the length of the connecting beam 1, after the insertion length of the two longitudinal beam segments 1c is adjusted, the bolt is screwed into the threaded sleeve through the connection process, thus achieving the adjustment and fixation of the length of the connecting beam 1.

[0124] Furthermore, it should be noted that when the length of the connecting beams 1 on both sides is adjustable, the side step mounting plates 6 installed on the side of each connecting beam 1 facing outwards should be detachably connected to the connecting beam 1. In practice, side step mounting plates 6 of appropriate length can be manufactured according to the adjusted length of the connecting beam 1, and then connected to the outside of the connecting beam 1 after the length of the connecting beam 1 is fixed.

[0125] The vehicle chassis of this embodiment adopts the above structure. Through the setting of the connecting beams 1 on both sides of the battery pack 2 and the internal crossbeams 202 in the battery pack 2, when the vehicle is involved in a side collision, the connecting beams 1 on the side can collapse to absorb energy and can transmit and disperse the collision force. At the same time, the internal crossbeams 202 inside the battery pack 2 can also provide support and protect the modules inside the battery pack 2 from stress. Therefore, this embodiment can increase the ability of the battery pack 2 to cope with side collisions and increase the side collision safety of the battery pack 2.

[0126] Furthermore, based on the setting of the connecting beams 1 on both sides, and especially by connecting the connecting beams 1 on both sides between the front and rear subframes, this embodiment can connect the front and rear subframes via the connecting beams 1 on both sides on the basis of the traditional monocoque body. In this way, by adopting a monocoque body structure with front and rear subframes, the lightweight characteristics of the monocoque body can be utilized to achieve the weight reduction of the body and improve the overall vehicle range.

[0127] By setting up connecting beams 1 on both sides, the front and rear subframes are connected, and the battery pack installation space Q is defined by the front crossbeam 404, the rear crossbeam 504, and the connecting beams 1 on both sides. The chassis structure of this embodiment can also form a ring frame structure for the battery pack by means of the connecting beams 1. In the event of a collision, the battery pack 2 can move together with the ring frame structure, which can reduce the impact of the collision on the battery pack 2, increase the collision safety of the battery pack 2, and improve the overall vehicle safety quality.

[0128] Furthermore, it should be noted that the chassis structure described in this embodiment, since the front and rear ends of the chassis are still front and rear subframes, and the Y-axis cross-section of the subframe structure is smaller than that of the frame in a non-load-bearing body, and the longitudinal beams at the subframe positions use a curved longitudinal beam structure, makes the chassis structure of this embodiment a structural innovation in the form of a subframe, which is significantly different from the conventional non-load-bearing frame beam structure. Specifically, in this embodiment, the front and rear subframes are still separate units; they are simply the addition of connecting beams 1 between the front and rear subframes in a load-bearing body, rather than the integrated beam structure found in a non-load-bearing body.

[0129] Of course, in the implementation where the connecting beam 1 is connected to the front and rear subframes, precisely because of the integrated structure of the front and rear subframes connected by the connecting beam 1, this embodiment, as mentioned above, not only utilizes the characteristics of the monocoque body structure to reduce vehicle weight and increase the vehicle's range, but also forms a ring-shaped protective frame for the battery pack, thereby better improving the collision safety of the battery pack 2. Therefore, it not only improves upon the shortcomings of the monocoque body structure but also possesses the advantages of the non-monocoque body structure, significantly enhancing the overall quality of the vehicle and demonstrating excellent practicality.

[0130] Example 2

[0131] This embodiment relates to a vehicle, specifically a new energy vehicle equipped with a battery pack, and more specifically, the vehicle is preferably a pure electric vehicle, and the vehicle chassis in Embodiment 1 is also provided in the vehicle.

[0132] It should be noted that, based on the vehicle chassis in Embodiment 1, the vehicle in this embodiment, during final assembly, is assembled in the same manner as existing monocoque chassis, with the subframe at the bottom being mounted onto the upper body. The upper body frame serves as the main load-bearing component of the vehicle, and chassis components are also assembled into the body via the front and rear subframes. Furthermore, in the event of a collision, the upper body frame, along with the front and rear subframes and connecting beam 1 in the chassis, participate in absorbing and transmitting the collision force, unlike in a non-monocoque chassis where the frame beam alone transmits force and absorbs energy.

[0133] The vehicle in this embodiment uses the chassis shown in Embodiment 1. On the one hand, the connection beams 1 on both sides of the battery pack 2 and the internal crossbeams 202 in the battery pack 2 help to improve the safety of the battery pack 2 in the event of a side collision.

[0134] On the other hand, the specific arrangement of the connecting beams 1 on both sides, especially by connecting the connecting beams 1 between the front and rear subframes, allows the front and rear subframes to be connected via the connecting beams 1 on both sides on the basis of a traditional load-bearing body. This not only helps to achieve vehicle weight reduction and improve the vehicle's range, but also reduces the impact of collisions on the battery pack 2, increases the collision safety of the battery pack 2, and helps to improve the overall vehicle safety quality, thus having great practicality.

[0135] The above description is only a preferred embodiment of the present invention and is 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 in the scope of protection of the present invention.

Claims

1. A vehicle chassis, characterized in that: The vehicle chassis has connecting beams (1) on the left and right sides, and a battery pack (2) located between the connecting beams (1) on both sides. The connecting beams (1) on both sides extend along the front-rear direction of the vehicle and are respectively located below the door sill beam (3) on the same side of the vehicle body; The battery pack (2) is connected to the connecting beams (1) on both sides on the left and right sides respectively, and the battery pack (2) is provided with an internal crossbeam (202) extending in the left and right direction of the whole vehicle. The projection of the internal crossbeam (202) and the connecting beams (1) on both sides in the left and right direction of the whole vehicle at least partially overlaps. The vehicle chassis has a front subframe (4) located at the front of the vehicle and a rear subframe (5) located at the rear of the vehicle. The connecting beams (1) on both sides connect the front subframe (4) and the rear subframe (5). The front subframe (4), the rear subframe (5) and the connecting beams (1) on both sides form a battery pack installation space (Q) for accommodating the battery pack (2). The rear subframe (5) has rear subframe longitudinal beams (501) located on the left and right sides. The front subframe (4) is provided with a front crossbeam (404) on the rear side. The front crossbeam (404) has a crossbeam body (404a) and an extension section (404b) is connected to both the left and right ends of the crossbeam body (404a). The connecting beams (1) on both sides are respectively connected to the extension section (404b) on the corresponding side. Each side of the connecting beam (1) has an inclined connecting section (1a) at its rear end. Each side of the connecting beam (1) is connected to the front end of the rear subframe longitudinal beam (501) on the same side through the connecting section (1a). A rear crossbeam (504) is connected between the rear subframe longitudinal beam (501) on both sides and the connecting section (1a). The battery pack installation space (Q) is formed between the front crossbeam (404), the rear crossbeam (504) and the connecting beams (1) on both sides. The battery pack (2) is provided with connecting brackets (201) on the left and right sides respectively. Each connecting bracket (201) is connected to the bottom of the connecting beam (1) on the same side. The battery pack (2) has side frames (203) on both the left and right sides. Each connecting bracket (201) is connected to the side frame (203) on the same side.

2. The vehicle chassis according to claim 1, characterized in that: The projection of the internal crossbeam (202) and the connecting brackets (201) on both sides in the left-right direction of the vehicle at least partially overlaps.

3. The vehicle chassis according to claim 2, characterized in that: The internal crossbeam (202) is connected between the two side frames (203); At least one of the side frame (203), the connecting bracket (201), and the internal beam (202) is made of extruded aluminum profile.

4. The vehicle chassis according to claim 1, characterized in that: The front subframe (4) is located below the front engine compartment in the vehicle body, and the rear subframe (5) is located below the rear floor in the vehicle body.

5. The vehicle chassis according to claim 4, characterized in that: The front subframe (4) has front subframe longitudinal beams (401) located on the left and right sides respectively. In the left-right direction of the vehicle, the connecting beams (1) on each side are located on the side of the front subframe longitudinal beam (401) and the rear subframe longitudinal beam (501) that are close to the outside of the vehicle.

6. The vehicle chassis according to claim 5, characterized in that: The extended section (404b) extends outward along the left-right direction of the vehicle, and the front subframe longitudinal beams (401) on both sides are connected to the crossbeam body (404a). The connecting beams (1) on both sides are connected to each of the front subframe longitudinal beams (401) through the front crossbeam (404).

7. The vehicle chassis according to claim 6, characterized in that: The distance between the connecting sections (1a) on both sides gradually decreases from front to back in the longitudinal direction of the vehicle.

8. The vehicle chassis according to claim 1, characterized in that: The connecting beams (1) on both sides are integrally formed; and / or, The length of the connecting beams (1) on both sides is adjustable along the front and rear direction of the vehicle, and the connecting beams (1) on both sides are respectively provided with a fixing structure, which is used to fix the length of the connecting beams (1) after adjustment.

9. The vehicle chassis according to any one of claims 1 to 8, characterized in that: In the left-right direction of the vehicle, each side of the connecting beam (1) is connected to a side step mounting plate (6) on the side facing outward. The side step mounting plate (6) extends along the front-rear direction of the vehicle and has a side step mounting surface (6a) on the top of the side step mounting plate (6).

10. A vehicle, characterized in that: The vehicle is equipped with a vehicle chassis as described in any one of claims 1 to 9.

Images