Chassis side structure, vehicle chassis and vehicle

Abstract

The invention provides a chassis side structure, a vehicle chassis and a vehicle. The chassis side structure comprises a connecting beam arranged below a doorsill beam in a vehicle body, the connecting beam extends in the front-back direction of the whole vehicle, and a side pedal mounting framework is arranged on the side, facing the outside of the vehicle, of the connecting beam in the left-right direction of the whole vehicle; the side pedal installation framework extends in the front-back direction of the whole vehicle, a side pedal installation face is arranged on the top of the side pedal installation framework, and the side pedal installation framework is detachably connected to the connecting beam through a connecting piece. Through the connecting beams on the side parts and the side pedal mounting frameworks detachably arranged on the connecting beams, the side pedal mounting structure can serve as a side collision energy absorption structure while serving as a side pedal assembly foundation, the collision energy absorption effect is achieved, one piece with two purposes can be achieved, so that the side pedal mounting frameworks are saved, the lightweight design of a vehicle body is achieved, and the cost is reduced. And the comprehensive quality of the whole vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a chassis side structure. The present invention also relates to a vehicle chassis provided with the chassis side structure, and a vehicle having the vehicle chassis. Background Art

[0002] In order to facilitate the passengers to get on and off the vehicle, some models with higher chassis will be equipped with side steps on the left and right sides of the vehicle body. When getting on and off the vehicle, the passengers can first step on the side steps and then enter or exit the cabin. At present, the side steps in traditional vehicles are generally mounted on the door sill beam on the side of the vehicle body through mounting brackets. The vehicle body structure such as mounting brackets can only serve as the side step assembly, which not only causes structural waste, but also is not conducive to the lightweight design of the vehicle, and affects the improvement of the overall quality of the vehicle. Summary of the invention

[0003] In view of this, the present invention aims to propose a chassis side structure to facilitate the lightweight design of the vehicle and improve the overall quality of the vehicle.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A chassis side structure, comprising a connecting beam arranged below a sill beam in a vehicle body, the connecting beam extending in the front-rear direction of the vehicle, and a side step mounting frame is arranged on a side of the connecting beam facing outwards of the vehicle along the left-right direction of the vehicle;

[0006] The side step mounting frame extends along the front-rear direction of the whole vehicle, and a side step mounting surface is provided on the top of the side step mounting frame, and the side step mounting frame is detachably connected to the connecting beam through a connecting piece.

[0007] Furthermore, the side step mounting frame is integrally formed, and / or the cross section of the side step mounting frame along the left-right direction of the entire vehicle has a plurality of cavity structures.

[0008] Furthermore, the side step mounting frame is made of extruded aluminum profiles, steel profiles or steel rolled parts, and / or the connecting parts are of a screw connection structure.

[0009] Further, the connecting beam is connected between a front subframe located at the front of the vehicle and a rear subframe located at the rear of the vehicle.

[0010] Furthermore, the front sub-frame has front sub-frame longitudinal beams disposed on the left and right sides, and the rear sub-frame has rear sub-frame longitudinal beams disposed on the left and right sides;

[0011] In the left-right direction of the whole vehicle, the connecting beam is located on the side of the front sub-frame longitudinal beam and the rear sub-frame longitudinal beam on the same side close to the outside of the vehicle.

[0012] Further, a front cross beam is provided at the rear side of the front sub-frame, the front cross beam has an overhanging section extending toward the outside of the vehicle along the left-right direction of the whole vehicle, the front end of the connecting beam is connected to the overhanging section, and is connected to the longitudinal beam of the front sub-frame through the front cross beam; and / or,

[0013] The rear end of the connecting beam is provided with a connecting section, which is inclined toward one side of the rear sub-frame longitudinal beam from front to rear along the front-to-rear direction of the vehicle, and the connecting beam is connected to the front end of the rear sub-frame longitudinal beam on the same side through the connecting section.

[0014] Further, a rear cross beam is provided on the front side of the rear sub-frame, and an end of the rear cross beam is connected to a position where the longitudinal beam of the rear sub-frame and the connecting beam are connected; and / or,

[0015] A rear subframe mounting point for connecting the rear subframe to a vehicle body is provided at a connection position between the connection beam and the rear subframe longitudinal beam.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The chassis side structure described in the present invention, through the side connecting beams and the side step mounting frame detachably arranged on the connecting beams, can make the side step mounting frame serve as the side collision energy absorption structure while serving as the side step assembly basis, thereby achieving dual purposes, saving the side step mounting frame, and facilitating the lightweight design of the vehicle. At the same time, the side step mounting frame is detachably connected to the connecting beams through connecting pieces, which can also facilitate the assembly of the side step mounting frame, facilitate the later maintenance and replacement of the side step mounting frame, and can improve the overall quality of the vehicle.

[0018] In addition, the side-step mounting frame is integrally formed, which can facilitate the preparation of the side-step mounting frame and ensure its structural strength. The cross-section of the side-step mounting frame has multiple cavity structures, which can also take advantage of the high strength of the cavity structure to further increase the structural strength of the side-step mounting frame. The side-step mounting frame is made of extruded aluminum profiles, steel profiles or steel rolled parts, which can facilitate the preparation of the side-step mounting frame and ensure the structural strength of the side-step mounting frame. The connecting piece adopts a screw connection structure, which can facilitate the connection setting of the side-step mounting frame on the connecting beam, and can also ensure the reliability of the connection between the side-step mounting frame and the connecting beam.

[0019] The connecting beams on both sides are connected between the front and rear subframes, which not only facilitates the arrangement of the connecting beams in the chassis, but also makes the overall chassis have the characteristics of a load-bearing body structure, which can take advantage of the smaller weight of the load-bearing body, facilitate the lightweighting of the body, and improve the vehicle's endurance. The connecting beams are located on the same side of the front subframe longitudinal beam and the side of the rear subframe longitudinal beam close to the outside of the vehicle, which helps to achieve the Y-section change of the front and rear parts of the load-bearing body, and meet the matching design requirements between the chassis and the body frame in the load-bearing body.

[0020] In addition, by providing a front cross beam at the rear side of the front sub-frame, and connecting the connecting beam to the longitudinal beam of the front sub-frame through the front cross beam, it is convenient to achieve the connection between the connecting beam and the front sub-frame, and it is easy to achieve the change of the Y-direction cross section of the front part of the vehicle body. Providing a connecting section at the rear end of the connecting beam is also convenient for the connection between the connecting beam and the longitudinal beam of the rear sub-frame, and the connecting section is inclined toward the longitudinal beam of the rear sub-frame, which is convenient for achieving the change of the Y-direction cross section of the rear part of the load-bearing body, so as to meet the matching design requirements between the chassis and the body frame in the load-bearing body.

[0021] By setting the rear cross beam and connecting the end of the rear cross beam to the position where the rear sub-frame longitudinal beam and the connecting section are connected, the structural strength and rigidity of the front part of the rear sub-frame can be increased, and the connection strength between the connecting beam and the rear sub-frame longitudinal beam can also be increased. Providing a rear sub-frame mounting point at the connection position between the connecting beam and the rear sub-frame longitudinal beam helps to increase the rigidity of the rear sub-frame mounting position, and can improve the dynamic rigidity of the assembled rear sub-frame.

[0022] Another object of the present invention is to provide a vehicle chassis, wherein the chassis side structure as described above is provided on both left and right sides of the vehicle chassis, and a battery pack installation space is formed between the connecting beams on both sides, and a battery pack is provided in the battery pack installation space;

[0023] The left and right sides of the battery pack are respectively connected to the connecting beams on the corresponding sides.

[0024] Furthermore, the battery pack is provided with an internal crossbeam extending in the left-right direction of the vehicle, and the projections of the internal crossbeam and the connecting beams on both sides in the left-right direction of the vehicle at least partially overlap; and / or,

[0025] The lengths of the connecting beams on both sides along the front-rear direction of the vehicle are adjustable, and fixing structures are respectively provided on the connecting beams on both sides, and the fixing structures are used to fix the adjusted lengths of the connecting beams.

[0026] The vehicle chassis described in the present invention, by arranging the above-mentioned chassis side structures on the left and right sides and arranging the battery pack between the connecting beams on both sides, can not only utilize the connecting beams on both sides to withstand the collision impact and transmit and disperse the collision force, but also can utilize the side step mounting frame outside the connecting beam to resist the collision impact and absorb collision energy, thereby greatly improving the collision safety of the battery pack and helping to improve the safety quality of the vehicle.

[0027] Secondly, by setting an internal crossbeam inside the battery pack, it can provide lateral support and protect the modules inside the battery pack from stress, which can increase the battery pack's ability to cope with side collisions and increase the safety of the battery pack when the vehicle hits the side. The length of the connecting beams on both sides is adjustable, and a fixed structure is set to fix the length of the connecting beams, which can help meet the wheelbase changes between different models, making the front and rear subframes common parts, which helps to achieve platform design and reduce the cost of vehicle development.

[0028] The present invention also provides a vehicle, wherein the vehicle chassis as described above is provided in the vehicle.

[0029] The vehicle described in the present invention has the same beneficial effects as the above-mentioned vehicle chassis, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 A schematic diagram of a chassis side structure according to an embodiment of the present invention;

[0032] Figure 2 It is a cross-sectional schematic diagram of the chassis side structure according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic diagram of the chassis side structure according to an embodiment of the present invention when it is assembled in a vehicle body;

[0034] Figure 4 It is a schematic structural diagram of a side step installation frame according to an embodiment of the present invention when a rolled piece is used;

[0035] Figure 5 It is a schematic diagram of the connection between the connecting beam and the front and rear sub-frames according to an embodiment of the present invention;

[0036] Figure 6 for Figure 5 Schematic diagram of the structure of the middle part;

[0037] Figure 7 It is a structural schematic diagram of the front subframe according to an embodiment of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the rear subframe according to an embodiment of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the rear cross beam according to an embodiment of the present invention;

[0040] Fig.10 It is a schematic structural diagram of a rear subframe anti-collision beam and a rear subframe energy absorption box according to an embodiment of the present invention;

[0041] Fig.11 A schematic structural diagram of a vehicle chassis according to an embodiment of the present invention;

[0042] Fig.12 A schematic diagram of the structure of a battery pack according to an embodiment of the present invention;

[0043] Fig.13 It is a schematic diagram of the arrangement of the internal cross beam according to an embodiment of the present invention;

[0044] Fig.14 This is a schematic diagram of the coordination of the internal cross beam, the connecting bracket and the connecting beam according to an embodiment of the present invention;

[0045] Fig.15 A schematic diagram of a connecting beam length adjustment structure according to an embodiment of the present invention;

[0046] Description of reference numerals:

[0047] 1. Connecting beam; 2. Side step mounting frame; 3. Door sill beam; 4. Front subframe; 5. Rear subframe; 6. Battery pack;

[0048] 1a, connecting section; 1c, longitudinal beam segmentation; 1d, fixed structure; 2a, side step mounting surface; 401, front subframe longitudinal beam; 402, front subframe front cross beam; 403, front subframe middle cross beam; 404, front cross beam; 404a, cross beam body; 404b, overhanging section; 405, front subframe anti-collision beam; 406, front subframe energy absorption box; 501, rear subframe longitudinal beam; 502, rear subframe front cross beam; 503, rear subframe rear cross beam; 504, rear cross beam; 5041, straight section; 5042, bending section; 505, rear subframe anti-collision beam; 506, rear subframe energy absorption box; 5a, rear subframe mounting point; 601, connecting bracket; 602, internal cross beam; 603, side frame;

[0049] A. Length adjustment position; B. Longitudinal beam connection position; Q. Battery pack installation space; G. Cavity structure. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0051] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0052] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0053] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0054] Embodiment 1

[0055] The present embodiment relates to a chassis side structure, which can preferably be applied to new energy vehicle models having a battery pack 6, and can be particularly applied to pure electric vehicles. The chassis side structure can facilitate the lightweight design of the vehicle and can improve the overall quality of the vehicle.

[0056] In terms of overall structure, combined Figures 1 to 3 As shown, the chassis side structure of this embodiment includes a connecting beam 1 arranged below the sill beam 3 in the vehicle body, the connecting beam 1 extends along the front-rear direction of the whole vehicle, and a side step mounting frame 2 is also arranged on the side of the connecting beam 1 facing the outside of the vehicle along the left-right direction of the whole vehicle.

[0057] The side step mounting frame 2 also extends along the front-rear direction of the vehicle, and a side step mounting surface 2a is provided on the top of the side step mounting frame 2. Meanwhile, the side step mounting frame 2 is also detachably connected to the connecting beam 1 through a connecting piece.

[0058] At this time, as set up above, through the side connecting beam 1, and the side step mounting frame 2 detachably arranged on the connecting beam 1, the side step mounting frame 2 can be used as the side collision energy absorption structure while serving as the side step assembly basis, playing a role in collision energy absorption, and can achieve dual uses in one piece to save the side step mounting frame, which is conducive to realizing the lightweight design of the vehicle.

[0059] At the same time, the side step mounting frame 2 is detachably connected to the connecting beam 1 through a connecting piece, which can facilitate the assembly of the side step mounting frame 2 and is beneficial to the later maintenance and replacement of the side step mounting frame 2, thereby also improving the overall quality of the whole vehicle.

[0060] Based on the overall introduction above, specifically, based on the setting of the above-mentioned side step mounting frame 2, by installing a side step panel and a side step decorative piece on the side step mounting surface 2a, a side step for assisting the driver and passengers in getting on and off the vehicle can be formed.

[0061] In addition, Figures 1 to 3 As shown, the side step mounting frame 2 of the present embodiment may preferably be integrally formed. Thus, the side step mounting frame 2 is integrally formed, which can facilitate the preparation of the side step mounting frame 2 and also ensure its structural strength.

[0062] In addition, as a preferred embodiment, during specific implementation, the present embodiment can also make the cross section of the side step mounting frame 2 along the left-right direction of the whole vehicle have multiple cavity structures G. In this way, by making the cross section of the side step mounting frame 2 have multiple cavity structures G, it can also take advantage of the high strength of the cavity structure G to further increase the structural strength of the side step mounting frame 2.

[0063] When the side step mounting frame 2 is integrally formed, or when the side step mounting frame 2 is specifically formed by connecting multiple parts, preferably, the side step mounting frame 2 of this embodiment can be made of, for example, an extruded aluminum profile, a steel profile, or a steel rolled part. In this case, the side step mounting frame 2 is made of an extruded aluminum profile or a steel profile, and its cross section can be, for example, Figure 2 As shown in FIG. 1 , when the side step mounting frame 2 is made of a rolled steel part, its cross section may be as follows: Figure 4 as shown in .

[0064] It is understandable that by making the side step mounting frame 2 made of one of extruded aluminum profiles, steel profiles or steel rolled parts, it is convenient to prepare the side step mounting frame 2 and also possible to ensure the structural strength of the side step mounting frame 2. Moreover, in addition to using the above-mentioned extruded aluminum profiles, steel profiles or steel rolled parts, of course, in specific implementation, the side step mounting frame 2 of this embodiment may also use other steel or aluminum plate-shaped or beam structures, which is not limited thereto.

[0065] In this embodiment, the above-mentioned connecting parts can preferably adopt a screw connection structure, and in the specific implementation, for example, a pre-embedded nut or a threaded sleeve can be set on the connecting beam 1, and a through connecting hole can be set on the side step mounting frame 2, so that the bolt can pass through the connecting hole and be screwed into the pre-embedded nut or threaded sleeve.

[0066] By making the connecting piece adopt a screw connection structure, it can be understood that it can facilitate the connection setting of the side step mounting frame 2 on the connecting beam 1, and at the same time can also ensure the reliability of the connection between the side step mounting frame 2 and the connecting beam 1, and has a good connection effect.

[0067] In this embodiment, as a feasible implementation form, the front and rear ends of the connecting beam 1 can be connected to the sill beam 3 on the same side, and the connection can be made by welding, screwing or riveting. In this case, the front and rear ends of the connecting beam 1 are connected to the sill beam 3, so that the connecting beams 1 on both sides can be arranged in the vehicle body, and the reliability of the setting of the connecting beam 1 in the vehicle body can be ensured.

[0068] However, in addition to connecting the two ends of the connecting beam 1 to the threshold beam 3 on the same side, as another feasible implementation form, continue as follows Figure 5 and Figure 6 As shown in the figure, the vehicle chassis of this embodiment having the side structures such as the above-mentioned connecting beam 1 and the side step mounting frame 2 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 above-mentioned connecting beam 1 is connected between the front subframe 4 and the rear subframe 5.

[0069] When the connecting beam 1 is connected between the front and rear sub-frames, the chassis side structure of this embodiment is Figure 5 The structure on one side of Figure 6 Specifically, the side structure located on the right side of the chassis is shown.

[0070] In addition, the front subframe 4 is arranged below the front cabin in the vehicle body, and the rear subframe 5 is arranged below the rear floor in the vehicle body. Moreover, based on the above, the connecting beams 1 on both sides are arranged between the front and rear subframes. At this time, it should be noted that the existing traditional vehicle bodies mainly include load-bearing bodies and non-load-bearing bodies, and the difference between the two lies mainly in the structure, weight, and riding comfort.

[0071] Among them, the non-load-bearing body is generally composed of two parts: the frame beam and the body. The frame is responsible for installing the engine, gearbox, suspension and other components, and the body is only responsible for providing a closed environment required for driving and riding, and does not play a role in bearing capacity. At the same time, the non-load-bearing body is heavy, has a high center of gravity, relatively poor handling, and is less comfortable when driving on paved roads. However, because the frame beam can provide good rigidity, the chassis is strong, has good anti-bumping performance, has good stability and safety, and is also easy to modify.

[0072] The monocoque has no rigid frame, and all the parts in the vehicle are directly mounted on the body. The body as a whole is a load-bearing structure that bears various loads. At the same time, the monocoque is light, has a low center of gravity, good handling, and is easy to assemble. It can also provide better comfort when driving on paved roads. However, the monocoque has weak torsional rigidity and load-bearing capacity, and because it has no rigid frame, it usually only strengthens the front, side, rear, and floor panels, and its overall safety is relatively poor.

[0073] Therefore, for new energy vehicles, especially pure electric vehicles, in order to fully utilize the advantages of the load-bearing body and improve the shortcomings of the load-bearing body, this embodiment creatively connects the connecting beam 1 between the front and rear subframes in the vehicle chassis structure, thereby making the vehicle chassis of this embodiment a chassis structure developed based on the load-bearing body.

[0074] It is understandable that by adopting a load-bearing body structure with front and rear subframes, this embodiment can utilize the characteristics of the load-bearing body with a small weight to achieve lightweight chassis, thereby improving the endurance of the vehicle. At the same time, by providing the connecting beam 1 and connecting the front and rear subframes into one, when the vehicle has a side collision, the connecting beam 1 can be used to withstand the collision impact and transmit and disperse the collision force, which helps to improve the safety during a side collision.

[0075] In this embodiment, the front sub-frame 4 has front sub-frame longitudinal beams 401 disposed on the left and right sides, and the rear sub-frame 5 has rear sub-frame longitudinal beams 501 disposed on the left and right sides. As a preferred implementation form, in the left-right direction of the whole vehicle, the connecting beam 1 is also located on the side of the front sub-frame longitudinal beam 401 and the rear sub-frame longitudinal beam 501 on the same side close to the outside of the vehicle.

[0076] At this time, the connecting beam 1 is made as Figure 5 As shown in the figure, the front sub-frame longitudinal beam 401 and the rear sub-frame longitudinal beam 501 on the same side close to the outside of the vehicle help to achieve the Y-direction cross-sectional change of the front and rear parts of the load-bearing body, and can meet the matching design requirements between the chassis and the body frame in the load-bearing body.

[0077] In addition, in this embodiment, if Figure 5 and Figure 7 As shown in , a front cross beam 404 is also provided at the rear of the front sub-frame 4, the front end of the connecting beam 1 is connected to the end of the front cross beam 404, and the rear end of the connecting beam 1 is specifically connected to the front end of the rear sub-frame longitudinal beam 501.

[0078] It should be pointed out that, as a preferred implementation form, the front cross beam 404 can be used as a part of the front sub-frame 4, and specifically as a front sub-frame rear cross beam located at the rear end of the front sub-frame 4. However, in addition to being the front sub-frame rear cross beam, the front cross beam 404 of this embodiment can also be connected between the front ends of the connecting beams 1 on both sides, and be independent of the beam structure provided on the front sub-frame 4. In this case, the front cross beam 404 can be integrated with the connecting beams 1 on both sides to form an integrated frame structure, and it is also connected to the front sub-frame 4 to achieve the connection between the connecting beams 1 and the front sub-frame 4.

[0079] Taking the front cross beam 404 as the rear cross beam of the front sub-frame as an example, in specific implementation, the front sub-frame 4 of this embodiment can refer to the front sub-frame structure of the existing load-bearing body, and generally speaking, it is still the same as Figure 7 As shown in the figure, in addition to the front sub-frame longitudinal beams 401 arranged on the left and right sides, the front sub-frame 4 also has a front sub-frame front cross beam 402 and a front sub-frame middle cross beam 403 connected between the front sub-frame longitudinal beams 401 on both sides, and the rear ends of the front sub-frame longitudinal beams 401 on both sides are connected to the front cross beam 404 which serves as the front sub-frame rear cross beam.

[0080] It should be noted that when the front cross beam 404 is independently provided from the front sub-frame 4, the connection between the front cross beam 404 and the front sub-frame 4 is generally connected to the rear ends of the front sub-frame longitudinal beams 401 on both sides. Moreover, when the front cross beam 404 is independently provided from the front sub-frame 4, the front sub-frame rear cross beam in the front sub-frame 4 can be selectively provided as required.

[0081] And continue as Figure 7 As shown, in this embodiment, a front sub-frame anti-collision beam 405 connected to the front sub-frame longitudinal beams 401 on both sides may also be provided at the front end of the front sub-frame 4, and the front sub-frame anti-collision beam 405 is specifically connected to the front ends of the front sub-frame longitudinal beams 401 on each side through a front sub-frame energy absorption box 406.

[0082] In addition, as a preferred implementation form, in the front subframe 4 of this embodiment, the front cross beam 404 also has an overhanging section 404b extending toward the outside of the vehicle along the left-right direction of the entire vehicle, and the front end of the connecting beam 1 is connected to the above-mentioned overhanging section 404b, and is thus connected to the front subframe longitudinal beam 401 through the front cross beam 404.

[0083] At this time, specifically, for example, the front cross beam 404 can be structurally provided with a cross beam body 404a located in the middle, and the above-mentioned extended section 404b is connected to the end of the cross beam body 404a. At the same time, the rear ends of the front sub-frame longitudinal beams 401 on each side of the front sub-frame 4 can be connected to the cross beam body 404a.

[0084] It can be understood that, by providing the extension section 404a in the front cross beam 404, it can facilitate the connection with the connecting beams 1 on both sides. Figure 5 By connecting the front sub-frame longitudinal beams 401 on the left and right sides of the front sub-frame 4 with the cross beam body 404a in the front cross beam 404, it is also helpful to achieve the change of the Y-direction (left-right direction of the whole vehicle) cross section of the front part of the load-bearing body, that is, the connecting beam 1 on each side and the front sub-frame longitudinal beam 401 are not in a straight line, but are bent at the connecting position between the two, thereby reducing the Y-direction cross section size of the body at the front sub-frame 4.

[0085] The above-mentioned change in the Y-direction cross-section of the front part of the vehicle body is obviously fundamentally different from the Y-direction cross-section of the frame beam in the non-load-bearing body that is basically consistent front and rear. In addition, the present embodiment meets the matching design requirements between the chassis and the body frame in the load-bearing body through the size change of the above-mentioned Y-direction cross-section of the front part of the vehicle body.

[0086] In this embodiment, still combined with Figure 5 and Figure 8 As shown in the figure, as a preferred embodiment, a connecting section 1a is provided at the rear end of the connecting beam 1, the connecting section 1a is inclined toward the side of the rear subframe longitudinal beam 501, and 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.

[0087] At this time, by setting an inclined connecting section 1a at the rear end of the connecting beam 1 on each side, it is possible to facilitate the connection between the connecting beam 1 and the rear subframe longitudinal beam 501, and make the connecting section 1a inclined toward the side of the rear subframe longitudinal beam 501. Similar to the design of the above-mentioned overhanging section 404b, it is also possible to facilitate the realization of the Y-direction cross-sectional change of the rear part of the load-bearing body, so as to not only meet the matching design requirements between the chassis and the body frame in the load-bearing body, but also become one of the main differences from the non-load-bearing body.

[0088] In this embodiment, it is worth noting that, in a specific implementation, the connecting beams 1 on both sides can be, for example, an integrally formed beam structure, and specifically an integral closed structure, and its cross section can be as follows: Figure 2 Moreover, the connecting beam 1 can also be formed in one piece with the front cross beam 404 and the rear subframe longitudinal beam 501 in the front and rear subframes.

[0089] In this way, it can be understood that by using a closed cross section, the structural strength of the connecting beam 1 itself can be ensured by taking advantage of the high strength of the cavity structure, and by forming the connecting beam 1 and the front and rear sub-frames in one piece, the front sub-frame 4, the connecting beam 1 and the rear sub-frame 5 connected as one piece can have better structural strength and rigidity.

[0090] Of course, in addition to being an integrated structure, the connecting beam 1 of this embodiment can also adopt other structures, and for example, it can adopt a steel profile welding structure, an aluminum alloy profile extrusion structure, etc. In addition, in addition to being integrally connected with the front cross beam 404 and the rear subframe longitudinal beam 501, in specific implementation, it is also possible to set the connecting beam 1 in a detachable manner. In this case, the above-mentioned detachable manner can generally adopt a screw connection structure, and combined with Figure 6 As shown, the connection position can be located at B near the four corners, and the connection direction can be X direction (front and rear direction of the whole vehicle) or Y direction, and the connection method can be plug-in or flat-panel docking.

[0091] Of course, in order to ensure the reliability of force transmission of the connecting beam 1, the above connection direction is preferably the X direction. At the same time, in order to ensure the convenience of operation, the connection method is also preferably flat plate docking. Figure 6 At the positions indicated by the reference numerals B, the connection beams 1 on each side can be arranged by means of a flat plate docking method and a screw connection structure connected along the X direction.

[0092] In this embodiment, continue to refer to Figure 5 as well as Figure 8 As shown, in the specific implementation, the rear subframe 5 can also refer to the rear subframe structure in the existing load-bearing body, and in terms of structure, as a preferred implementation form, in addition to being similar to the existing rear subframe structure, a rear subframe front cross beam 502 and a rear subframe rear cross beam 503 are connected between the rear subframe longitudinal beams 501 on both sides, and further, a rear cross beam 504 is also connected between the position where the rear subframe longitudinal beams 501 on both sides are connected to the connecting beam 1, that is, between the connection position between the rear subframe longitudinal beams 501 on both sides and the connecting section 1a.

[0093] At this point, it can be understood that, through the arrangement of the above-mentioned rear cross beam 504, not only the structural strength and rigidity of the front portion of the rear sub-frame 5 can be increased, but also the rear cross beam 504 is arranged between the connection positions of the connecting sections 1a on both sides and the rear sub-frame longitudinal beam 501. In this way, by connecting the ends of the rear cross beam 504 to the connection positions between the connecting sections 1a on each side and the rear sub-frame longitudinal beam 501, it is also helpful to ensure the connection strength of the rear cross beam 504 and to better improve the dynamic rigidity of the front portion of the rear sub-frame 5.

[0094] In specific implementation, the rear cross beam 504 of this embodiment may also adopt an integrally formed closed structure, so that it has a higher structural strength. In addition, in order to further increase the strength of the rear cross beam 504 and to facilitate the installation of the rear end of the battery pack 6, the rear cross beam 504 is provided with a plurality of rear cross beams 504, each of which is provided with a plurality of rear cross beams 504. Fig. 9 As shown in , the rear cross beam 504 of this embodiment can be designed to be arched downward along the vertical direction of the whole vehicle, and have a straight section 5041 located in the middle, and bent sections 5042 located on the left and right sides. The bent sections 5042 on both sides are inclined upward and are respectively connected to the rear subframe longitudinal beam 501 on the same side.

[0095] In this embodiment, as a preferred implementation form, still refer to Figure 8 A rear subframe mounting point 5a for connecting the rear subframe 5 to the vehicle body may be provided at the connection position between each side connecting beam 1 and the rear subframe longitudinal beam 501, that is, the connection position between each side connecting section 1a and the rear subframe longitudinal beam 501.

[0096] In specific implementation, the above-mentioned rear sub-frame mounting point 5a can generally adopt a connection hole, and a shaft sleeve can be embedded in the connection hole to connect the rear sub-frame 5 to the vehicle body through bolts. In addition, it can be understood that by providing the rear sub-frame mounting point 5a at the connection position between the connecting beam 1 and the rear sub-frame longitudinal beam 501, it can help increase the rigidity of the rear sub-frame 5 installation position, thereby improving the dynamic rigidity of the assembled rear sub-frame 5.

[0097] In this embodiment, Figure 5 and Figure 8 As shown, as a preferred implementation form, different from the existing rear sub-frame structure, this embodiment is provided with a rear sub-frame anti-collision beam 505 connected to the rear sub-frame longitudinal beams 501 on both sides at the rear end of the rear sub-frame 5. In this way, it can be understood that by arranging the rear sub-frame anti-collision beam 505 at the rear end of the rear sub-frame 5, on the one hand, it can improve the rear collision force transmission performance of the rear sub-frame 5, and can make the collision force better dispersed to the rear sub-frame longitudinal beams 501 on both sides through the rear sub-frame anti-collision beam 505, so as to be transmitted forward along the rear sub-frame longitudinal beam 501, avoiding single-position force, collision force is difficult to disperse, and deformation is too large. On the other hand, by arranging the above-mentioned rear sub-frame anti-collision beam 505, the rear sub-frame anti-collision beam 505 can also be used as a pedestrian anti-rolling beam at the rear of the vehicle, thereby improving the safety during the reversing process.

[0098] It should be noted that in the specific implementation, Fig.10As shown, the structure of the rear subframe anti-collision beam 505 can refer to the front subframe anti-collision beam 405 in the front subframe 4, and it can adopt a sheet metal stamping structure, or it can also adopt an aluminum alloy extrusion profile. At the same time, on the basis of setting the rear subframe anti-collision beam 505, preferably, the rear ends of the rear subframe longitudinal beams 501 on both sides can also be connected to the rear subframe energy absorption box 506, and the rear subframe anti-collision beam 505 is specifically connected to the rear subframe energy absorption box 506 on both sides.

[0099] At this time, the rear subframe energy absorption box 506 is the same as the front subframe energy absorption box 406 in the front subframe 4, and both adopt the conventional energy absorption box structure used in the existing vehicle body. And it can be understood that, by connecting the rear subframe rear anti-collision beam 505 with the rear subframe longitudinal beam 501 through the rear subframe energy absorption box 506, it can be crushed and energy absorbed through the rear subframe energy absorption box 506, so as to further improve the rear collision safety of the vehicle.

[0100] The chassis side structure of this embodiment is provided with a side connecting beam 1 and a side step mounting frame 2 detachably arranged on the connecting beam 1. The side step mounting frame 2 can be used as a side collision energy absorption structure while serving as a side step assembly basis, thereby achieving dual-purposes, saving the side step mounting frame, and facilitating a lightweight design of the vehicle. At the same time, by making the side step mounting frame 2 detachably connected to the connecting beam 1 through a connecting piece, the assembly of the side step mounting frame 2 can also be facilitated, which is conducive to the later maintenance and replacement of the side step mounting frame 2, and can improve the overall quality of the vehicle, and has good practicality.

[0101] Embodiment 2

[0102] This embodiment relates to a vehicle chassis, comprising Figure 5 , and combined with Fig.11 As shown in , the chassis side structure of the first embodiment is provided on both the left and right sides of the vehicle chassis, and a battery pack installation space Q is formed between the connecting beams 1 on both sides, and a battery pack 6 is provided in the battery pack installation space Q. The left and right sides of the battery pack 6 are also connected to the connecting beams 1 on the corresponding sides, respectively.

[0103] At this point, still referring to the description in the first embodiment, as a preferred implementation form, in the vehicle chassis of this embodiment, the connecting beams 1 on both sides can still be connected between the front sub-frame 4 and the rear sub-frame 5, and a front cross beam 404 can be arranged at the rear side of the front sub-frame 4, and a rear cross beam 504 can be arranged at the front of the rear sub-frame 5. In this way, the battery pack installation space Q is also specifically formed between the front cross beam 404, the rear cross beam 504 and the connecting beams 1 on both sides, so that the annular frame structure formed by the front cross beam 404, the rear cross beam 504 and the connecting beams 1 on both sides can become a rigid enveloping structure adapted to the shape of the battery pack 6, which can better improve the collision safety of the battery pack 6.

[0104] In this embodiment, continue as Figure 12 to Figure 14 As shown in FIG. 1 , as a preferred embodiment, connection brackets 601 are respectively provided on the left and right sides of the battery pack 6, and the connection brackets 601 on each side are connected to the bottom of the connection beam 1 on the same side, so as to realize the loading of the battery pack 6 in the vehicle chassis. In addition, by providing the connection brackets 601 on both sides, the connection between the battery pack 6 and the connection beam 1 can also be easily realized.

[0105] In addition, in this embodiment, as a preferred implementation form, an internal crossbeam 602 extending in the left-right direction of the vehicle is also provided in the battery pack 6, and the internal crossbeam 602 at least partially overlaps with the projection of the connecting beams 1 on both sides in the left-right direction of the vehicle. In this way, by providing the internal crossbeam 602 overlapping with the projection of the connecting bracket 601 in the battery pack 6, the supporting function of the internal crossbeam 602 can be utilized to ensure the supporting strength of the connecting beam 1 and the door sill beam 3 at the side, which is conducive to further increasing the safety of the battery pack 6.

[0106] Specifically, as a preferred implementation form, the internal beams 602 located in the battery pack 6 can be arranged as a plurality of beams arranged at intervals, and at the same time, each internal beam 602 can also be arranged to at least partially overlap with the projection of the connecting brackets 601 on both sides in the left-right direction of the vehicle. In this way, it can be understood that the internal beams 602 in the battery pack 6 also overlap with the projection of the connecting brackets 601 in the left-right direction of the vehicle, which can ensure the arrangement strength of the side connecting brackets 601 while making the internal beams 602 have a better supporting effect, thereby facilitating the reliability of the assembly of the battery pack 6.

[0107] In this embodiment, as a preferred implementation form, in specific implementation, there are side frames 603 on both sides of the battery pack 6, and the connecting brackets 601 located on the left and right sides of the battery pack 6 are fixedly connected to the side frames 603 on the corresponding sides. At the same time, the internal cross beam 602 is connected between the side frames 603 on both sides, and preferably, the side frames 603, the connecting brackets 601 and the internal cross beam 602 can also be made of extruded aluminum profiles.

[0108] Therefore, it can be understood that the connecting brackets 601 on each side are connected to the side frame 603 on the same side, and the internal cross beam 602 is located between the side frames 603 on both sides. At the same time, the side frames 603, the connecting brackets 601 and the internal cross beam 602 are made of extruded aluminum profiles, which not only facilitates the arrangement of the connecting brackets 601 on the battery pack 6, but also ensures the structural strength of the side frames 603, the connecting brackets 601 and the internal cross beam 602, which helps to ensure the overall rigidity of the battery pack 6.

[0109] It should be noted that when the side frame 603 and the connecting bracket 601 are both made of extruded aluminum profiles, preferably, the connecting bracket 601 and the side frame 603 can also be integrally formed. In this way, the preparation of the connecting bracket 601 and the side frame 603 can be facilitated, and the structural strength of the connecting bracket 601 and the side frame 603 can also be ensured, thereby ensuring the reliability of the battery pack 6 after assembly.

[0110] In addition, it should be noted that, in addition to the side frames 603 on the left and right sides, similar frame structures are also provided at the front and rear ends of the battery pack 6, and the front and rear end frame structures can generally also be made of extruded aluminum profiles. Fig.14 As shown, the side frame 603 may also be configured to have a triangular cross-section, for example, so as to utilize the high strength of the triangular structure to better increase the strength of the side frame 603 .

[0111] In addition to making the side frame 603, the connecting bracket 601 and the internal cross beam 602 use extruded aluminum profiles, it should be noted that, of course, according to design requirements during specific implementation, this embodiment makes part of the side frame 603, the connecting bracket 601 and the internal cross beam 602 use extruded aluminum profiles, which is also possible.

[0112] In addition, in this embodiment, in addition to connecting the internal cross beam 602 and the connecting bracket 601 through the side frame 603, in the specific implementation, the end of the internal cross beam 602 passes through the side frame 603 and is directly connected to the connecting bracket 601. This is also feasible as long as it can ensure that the projections between the internal cross beam 602 and the connecting brackets 601 on both sides at least partially overlap.

[0113] In this embodiment, based on the arrangement of the connection brackets 601 on the left and right sides of the battery pack 6, during specific implementation, the connection brackets 601 on each side can generally be connected to the bottom of the connection beam 1 on the same side through a connection assembly to achieve assembly of the battery pack 6.

[0114] Among them, the above-mentioned connecting component can be specifically connected to the threaded sleeve arranged in the connecting beam 1, and when it is specifically implemented, this embodiment can also make it possible for some connecting components used for assembling the battery pack 6 to connect the battery pack 6 and the connecting beam 1 together, and some connecting components to connect the battery pack 6, the connecting beam 1 and the threshold beam 3 together.

[0115] In this way, the partial connection assembly can connect the battery pack 6, the connection beam 1 and the door sill beam 3 together, so that the battery pack 6 can be installed and the connection beams 1 on both sides and the battery pack 6 can be installed in the vehicle body at the same time, thus realizing the integrated design of the partial installation structure of the battery pack 6. With this integrated design, it is not necessary to separately set the connection structure between the connection beam 1 and the vehicle body on both sides of the battery pack 6, which is conducive to reducing the cost of the vehicle installation structure.

[0116] In this embodiment, based on the setting of the connecting beams 1 on both sides, in addition to making the connecting beams 1 on both sides an integrated structure, as a preferred implementation form, it can also be set so that the length of the connecting beams 1 on both sides along the front and rear directions of the whole vehicle can be adjusted, and at the same time, fixed structures 1d are respectively set on the connecting beams 1 on both sides to fix the adjusted length of the connecting beams 1 through the fixed structures 1d.

[0117] At this time, by making the length of the connecting beams 1 on both sides adjustable and providing a fixed structure for fixing the length of the connecting beams 1, it is possible to meet the wheelbase changes between different vehicle models and make the front and rear subframes a common part, thereby helping to achieve platform design and reduce the research and development costs of the entire vehicle.

[0118] In specific implementation, the length adjustment positions of the connecting beams 1 on both sides can be as follows: Figure 1 Indicated by the label A, and, as Fig.15 As shown in , in order to achieve the adjustable length of the connecting beam 1, for example, the two longitudinal beam segments 1c disconnected at the position marked A can be connected by plugging, and at the same time, the above-mentioned fixing structure 1d can be fixed in the form of a threaded sleeve and a bolt.

[0119] The threaded sleeve can be fixed in one of the longitudinal beam segments 1c, and connecting holes are respectively provided on the two longitudinal beam segments 1c, and the connecting holes on the outer longitudinal beam segment 1c are arranged in a plurality of intervals. 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, so that the length of the connecting beam 1 can be adjusted and the adjusted length of the connecting beam 1 can be fixed.

[0120] In addition, it should be noted that when the length of the connecting beams 1 on both sides is adjustable, the side step mounting frame 2 disposed on the side of each side connecting beam 1 facing the outside of the vehicle should be detachably connected to the connecting beam 1. In specific implementation, the side step mounting frame 2 of a suitable 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.

[0121] The vehicle chassis of this embodiment, by arranging the chassis side structure of the first embodiment on the left and right sides and arranging the battery pack 6 between the connecting beams on both sides, can not only utilize the connecting beams 1 on both sides to withstand the collision impact and transmit and disperse the collision force, but also can utilize the side step mounting frame 2 on the outer side of the connecting beam 1 to resist the collision impact and absorb collision energy, thereby greatly improving the collision safety of the battery pack 6 and helping to improve the safety quality of the vehicle.

[0122] In addition, in the vehicle chassis of the present embodiment, on the basis of setting the connecting beams 1 on both sides, especially by connecting the connecting beams 1 on both sides between the front and rear sub-frames, the front and rear sub-frames can also be connected through the connecting beams 1 on both sides on the basis of the traditional load-bearing body. In this way, by adopting a load-bearing body structure with front and rear sub-frames, the weight of the load-bearing body can be utilized to achieve lightweighting of the body, thereby improving the endurance of the entire vehicle.

[0123] By setting the connecting beams 1 on both sides, the front and rear subframes are connected, and the front crossbeam 404, the rear crossbeam 504 and the connecting beams 1 on both sides jointly define the battery pack installation space Q. The chassis structure of this embodiment can also form a battery pack annular frame structure with the connection of the connecting beams 1. In the event of a collision, the battery pack 6 can move with the annular frame structure, which can reduce the collision impact on the battery pack 6 and increase the collision safety of the battery pack 6, so as to improve the safety quality of the whole vehicle.

[0124] In addition, it should be noted that the vehicle chassis structure of this embodiment is still a front and rear subframe at the front and rear ends of the chassis, and the subframe structure has a smaller Y-direction cross-section than the frame in the non-load-bearing body, and the longitudinal beam at the subframe position continues to use a curved longitudinal beam structure, making the chassis structure of this embodiment a structural innovation in the form of a subframe, and significantly different from the conventional non-load-bearing frame beam structure. Specifically, the front and rear subframes in this embodiment are still separate units, and they are just based on the front and rear subframes in the load-bearing body, and further add a front and rear connecting beam 1, which is not an integrated beam structure in the non-load-bearing body.

[0125] Of course, in the embodiment in which the connecting beam 1 is connected to the front and rear subframes, it is precisely because of the use of the integrated structure of the front and rear subframes connected by the connecting beam 1 that this embodiment, as mentioned above, can not only utilize the characteristics of the load-bearing body structure to reduce the body weight to increase the vehicle endurance, but also form a battery pack annular protection frame to better improve the collision safety of the battery pack 6. Therefore, it not only improves the shortcomings of the load-bearing body structure, but also has the advantages of the non-load-bearing body structure, can well improve the overall quality of the vehicle, and has good practicality.

[0126] Embodiment 3

[0127] The present embodiment relates to a vehicle, which is specifically a new energy vehicle type provided with a battery pack 6, and specifically, the vehicle is preferably a pure electric vehicle type, and the vehicle chassis in the second embodiment is provided in the vehicle.

[0128] It should be noted that, based on the vehicle chassis of the second embodiment, the vehicle of this embodiment is assembled in the same manner as the existing load-bearing body assembly, that is, the bottom subframe is still assembled to the upper body, and the upper body frame is the load-bearing body in the vehicle, and the chassis accessories are also assembled to the body relying on the front and rear subframes. In addition, when the vehicle collides, the upper body frame, the front and rear subframes in the chassis, and the connecting beam 1 participate in the absorption and transmission of the collision force, instead of the frame beam alone transmitting force and absorbing energy as in the non-load-bearing body.

[0129] The vehicle of this embodiment is provided with the vehicle chassis of the second embodiment. On the one hand, it can utilize the side connection beam 1 and the side step mounting frame 2 to increase the safety of the battery pack 6. On the other hand, in terms of the specific arrangement of the connection beams 1 on both sides, especially by connecting the connection beams 1 between the front and rear sub-frames, the front and rear sub-frames can be connected via the connection beams 1 on both sides on the basis of the traditional load-bearing body, which is not only conducive to achieving lightweight of the body and improving the endurance of the whole vehicle, but also can reduce the collision impact on the battery pack 6, increase the collision safety of the battery pack 6, help improve the safety quality of the whole vehicle, and have good practicality.

[0130] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A chassis side structure, characterized in that: The vehicle comprises a connecting beam (1) arranged below a sill beam (3) in a vehicle body, the connecting beam (1) extending in the front-rear direction of the vehicle, and a side step mounting frame (2) is provided on a side of the connecting beam (1) facing outward from the vehicle along the left-right direction of the vehicle; The side step mounting frame (2) extends along the front-rear direction of the whole vehicle, and a side step mounting surface (2a) is provided on the top of the side step mounting frame (2), and the side step mounting frame (2) is detachably connected to the connecting beam (1) via a connecting piece.

2. The chassis side structure according to claim 1, characterized in that: The side step mounting frame (2) is integrally formed, and / or the side step mounting frame (2) has a plurality of cavity structures (G) in a cross section along the left-right direction of the entire vehicle.

3. The chassis side structure according to claim 1, characterized in that: The side step mounting frame (2) is made of extruded aluminum profiles, steel profiles or steel rolled parts, and / or the connecting parts are of a screw connection structure.

4. The chassis side structure according to any one of claims 1 to 3, characterized in that: The connecting beam (1) is connected between a front subframe (4) located at the front of the vehicle and a rear subframe (5) located at the rear of the vehicle.

5. The chassis side structure according to claim 4, characterized in that: The front sub-frame (4) has front sub-frame longitudinal beams (401) disposed on the left and right sides, and the rear sub-frame (5) has rear sub-frame longitudinal beams (501) disposed on the left and right sides; In the left-right direction of the vehicle, the connecting beam (1) is located on the same side of the front sub-frame longitudinal beam (401) and the rear sub-frame longitudinal beam (501) close to the outside of the vehicle.

6. The chassis side structure according to claim 5, characterized in that: A front cross beam (404) is provided on the rear side of the front sub-frame (4), the front cross beam (404) having an extension section (404b) extending toward the outside of the vehicle along the left-right direction of the whole vehicle, the front end of the connecting beam (1) is connected to the extension section (404b), and is connected to the front sub-frame longitudinal beam (401) through the front cross beam (404); and / or, A connecting section (1a) is provided at the rear end of the connecting beam (1), and from front to rear along the front-to-rear direction of the vehicle, the connecting section (1a) is inclined toward one side of the rear sub-frame longitudinal beam (501), and the connecting beam (1) is connected to the front end of the rear sub-frame longitudinal beam (501) on the same side via the connecting section (1a).

7. The chassis side structure according to claim 5, characterized in that: A rear cross beam (504) is provided on the front side of the rear sub-frame (5), and an end of the rear cross beam (504) is connected to a position where the rear sub-frame longitudinal beam (501) and the connecting beam (1) are connected; and / or, A rear subframe mounting point (5a) for connecting the rear subframe (5) to a vehicle body is provided at a connection position between the connection beam (1) and the rear subframe longitudinal beam (501).

8. A vehicle chassis, characterized in that: The chassis side structure according to any one of claims 1 to 7 is provided on both left and right sides of the vehicle chassis, and a battery pack installation space (Q) is formed between the connecting beams (1) on both sides, and a battery pack (6) is provided in the battery pack installation space (Q); The left and right sides of the battery pack (6) are respectively connected to the connecting beam (1) on the corresponding sides.

9. The vehicle chassis according to claim 8, characterized in that: The battery pack (6) is provided with an internal crossbeam extending in the left-right direction of the vehicle, and the projections of the internal crossbeam and the connecting beams (1) on both sides in the left-right direction of the vehicle at least partially overlap; and / or, The lengths of the connecting beams (1) on both sides along the front-rear direction of the vehicle are adjustable, and fixing structures are respectively provided on the connecting beams (1) on both sides, and the fixing structures are used to fix the adjusted length of the connecting beams (1).

10. A vehicle, characterized in that: The vehicle is provided with the vehicle chassis according to claim 8 or 9.

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