CN119705625B

CN119705625B - Chassis side structure, vehicle chassis and vehicle

Info

Publication number: CN119705625B
Application number: CN202311280583.3A
Authority: CN
Inventors: 于广通; 陈强; 贺志杰
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2025-10-28
Anticipated expiration: 2043-09-28
Also published as: CN119705625A

Abstract

The present invention provides a chassis side structure, a vehicle chassis, and a vehicle. The chassis side structure of the present invention includes a connecting beam arranged below a rocker beam in a vehicle body, the connecting beam extending in the front-to-rear direction of the vehicle, and in the left-to-right direction of the vehicle, a side step mounting frame is provided on the side of the connecting beam facing outward; the side step mounting frame extends in the front-to-rear direction of the 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 integrally formed with the connecting beam. The present invention uses the side connecting beam and the side step mounting frame integrally formed on the connecting beam to serve as a side collision energy absorbing structure while serving as a side step assembly base, playing a role in collision energy absorption, and can achieve dual purposes, thereby saving the side step mounting frame, which is beneficial to achieving a lightweight design of the vehicle body and improving the overall quality of the vehicle.

Description

Chassis side structure, vehicle chassis and vehicle

Technical Field

The invention relates to the technical field, in particular to a side structure of a chassis. The invention also relates to a vehicle chassis provided with the chassis side structure and a vehicle with the vehicle chassis.

Background

In the prior art, in order to facilitate drivers to get on or off the vehicle in some vehicle types with higher chassis, side pedals are arranged on the left side and the right side of the vehicle body, when the driver gets on or off the vehicle, the side pedals are used as a middle supporting point, and the driver can step on the side pedals first and then enter the driving cabin or go out of the driving cabin.

At present, the side steps in the traditional automobile body are generally assembled on the threshold beam at the side part of the automobile body through the mounting bracket, and the automobile body structures such as the mounting bracket only can play a role in side step assembly, so that not only can the structure be wasted, but also the lightweight design of the automobile is not facilitated, and the improvement of the comprehensive quality of the whole automobile can be influenced

Disclosure of Invention

In view of the above, the present invention aims to provide a chassis side structure, which is beneficial to the lightweight design of a vehicle and can improve the overall quality of the whole vehicle.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

the chassis side part structure comprises a connecting beam arranged below a threshold beam in a vehicle body, wherein the connecting beam extends along the front-rear direction of the whole vehicle and along the left-right direction of the whole vehicle, and a side pedal installation framework is arranged on one side of the connecting beam facing the outside of the vehicle;

The side pedal installation framework extends along the front and rear directions of the whole vehicle, a side pedal installation surface is arranged at the top of the side pedal installation framework, and the side pedal installation framework and the connecting beam are integrally formed.

Further, the deformation capacity of the side pedal installation framework in the left-right direction of the whole vehicle is larger than that of the connecting beam in the left-right direction of the whole vehicle.

Furthermore, the connecting beam and the side pedal installation framework are extruded aluminum profiles;

The side pedal installation framework is provided with a framework outer wall which is formed with a framework inner cavity in a surrounding way, and framework reinforcing ribs arranged in the framework inner cavity;

The connecting beam is provided with a beam body outer wall which is formed into a beam body inner cavity in a surrounding mode, and beam body reinforcing ribs which are arranged in the beam body inner cavity.

Further, the framework reinforcing ribs are arranged along the up-down direction of the whole vehicle, the beam reinforcing ribs are arranged along the left-right direction of the whole vehicle, and the bottom part of the outer wall of the framework is arranged in a wave-folded shape along the left-right direction of the whole vehicle, and/or,

The thickness of the outer wall of the framework and the thickness of the reinforcing ribs of the framework are smaller than the thickness of the outer wall of the beam body and the thickness of the reinforcing ribs of the beam body.

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;

the front auxiliary frame is internally provided with front auxiliary frame longitudinal beams which are respectively arranged at the left side and the right side, and the rear auxiliary frame is internally provided with rear auxiliary frame longitudinal beams which are respectively arranged at the left side and the right side;

in the left-right direction of the whole vehicle, the connecting beam is positioned on the same side of one side, close to the outside of the vehicle, of the front auxiliary frame longitudinal beam and the rear auxiliary frame longitudinal beam.

Further, the rear side of the front auxiliary frame is provided with a front cross beam, the front cross beam is provided with an outer extension section extending to one side outside the vehicle along the left-right direction of the whole vehicle, the front end of the connecting beam is connected with the outer extension section and is connected with the front auxiliary frame longitudinal beam through the front cross beam, and/or,

The rear end of the connecting beam is provided with a connecting section which is gradually inclined towards the rear auxiliary frame longitudinal beam from front to rear along the front direction of the whole vehicle, and the connecting beam is connected with the front end of the rear auxiliary frame longitudinal beam on the same side through the connecting section.

Further, the front side of the rear auxiliary frame is provided with a rear cross beam, the end part of the rear cross beam is connected with the position where the rear auxiliary frame longitudinal beam is connected with the connecting beam, and/or,

And a rear auxiliary frame mounting point for connecting the rear auxiliary frame with the vehicle body is arranged at the connecting position between the connecting beam and the rear auxiliary frame longitudinal beam.

Compared with the prior art, the invention has the following advantages:

According to the chassis side structure, through the connecting beam at the side and the side pedal installation framework integrally formed on the connecting beam, the side pedal installation framework can serve as a side pedal assembly foundation and a side collision energy absorption structure at the same time, so that the side pedal installation framework has a collision energy absorption function, one piece of dual-purpose structure can be realized, the side pedal installation framework is saved, the lightweight design of a vehicle body is facilitated, and the comprehensive quality of the whole vehicle can be improved.

In addition, the deformation capacity of the side pedal installation framework in the left-right direction of the whole vehicle is larger than that of the connecting beam in the left-right direction of the whole vehicle, so that the side pedal installation framework can preferentially collapse and absorb energy when the vehicle bumps on one hand, the collision force transferred to the inside of the vehicle body is reduced, and the larger rigidity of the connecting beam can be utilized on the other hand, the collision deformation of the connecting beam is reduced, and the inside structure of the vehicle body is better protected. The connecting beam and the side pedal installation framework adopt extruded aluminum profiles, so that the preparation can be facilitated, the side pedal installation framework and the connecting beam are both formed with an inner cavity, and meanwhile, the reinforcing ribs are arranged in the inner cavity, so that the structural strength of the connecting beam and the side pedal installation framework can be ensured.

The framework reinforcing ribs are arranged along the up-down direction of the whole vehicle, the beam reinforcing ribs are arranged along the left-right direction of the whole vehicle, the bottom part of the outer wall of the framework is arranged in a wave-folded shape along the left-right direction of the whole vehicle, and the rigidity of the side pedal installation framework is lower than that of the connecting beam while the structural strength of the side pedal installation framework and the structural strength of the connecting beam are ensured. The thickness of the outer wall of the framework and the thickness of the reinforcing ribs of the framework are smaller than those of the outer wall of the beam body and the thicknesses of the reinforcing ribs of the beam body, and the rigidity of the side pedal installation framework can be also smaller than that of the connecting beam.

In addition, the connecting beams on two sides are connected between the front auxiliary frame and the rear auxiliary frame, so that the arrangement of the connecting beams in the chassis can be facilitated, the whole chassis has the structural characteristics of a bearing type vehicle body, the advantage of smaller weight of the bearing type vehicle body can be utilized, the light weight of the vehicle body can be realized, and the cruising ability of the whole vehicle can be improved. The connecting beam is positioned on one side of the front auxiliary frame longitudinal beam and the rear auxiliary frame longitudinal beam which are positioned on the same side and are close to the outside of the vehicle, so that Y-direction section change of the front part and the rear part of the bearing type vehicle body is realized, and the matching design requirement between the chassis and the vehicle body framework in the bearing type vehicle body is met.

The front cross beam is arranged on the rear side of the front auxiliary frame, the connecting beam is connected with the front auxiliary frame longitudinal beam through the front cross beam, connection between the connecting beam and the front auxiliary frame is facilitated, and change of the Y-direction section of the front part of the vehicle body can be conveniently realized. The rear end of the connecting beam is provided with the connecting section, so that the connection between the connecting beam and the rear auxiliary frame longitudinal beam is facilitated, the connecting section inclines to one side of the rear auxiliary frame longitudinal beam, Y-direction section change of the rear part of the bearing type automobile body is facilitated, and the matching design requirement between the chassis and the automobile body framework in the bearing type automobile body is met.

The arrangement of the rear cross beam is utilized, and the end part of the rear cross beam is connected with the connecting section of the rear auxiliary frame longitudinal beam, so that the structural strength and rigidity of the front part of the rear auxiliary frame can be increased, and the connection strength between the connecting beam and the rear auxiliary frame longitudinal beam can be increased. The rear auxiliary frame mounting point is arranged at the connecting position between the connecting beam and the rear auxiliary frame longitudinal beam, so that the rigidity of the mounting position of the rear auxiliary frame is increased, and the dynamic rigidity of the assembled rear auxiliary frame can be improved.

Another object of the present invention is to provide a vehicle chassis, wherein the left and right sides of the vehicle chassis are provided with the chassis side structures, a battery pack installation space is formed between the connecting beams at the two sides, and a battery pack is arranged in the battery pack installation space;

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

Further, an internal cross beam extending along the left-right direction of the whole vehicle is arranged in the battery pack, the projection of the internal cross beam and the connecting beams at two sides in the left-right direction of the whole vehicle is at least partially overlapped, and/or,

The left and right sides of battery package is equipped with the linking bridge respectively, each side the linking bridge is all connected in the homonymy through a plurality of connecting pieces the below of compensating beam, and part the connecting piece will the linking bridge the compensating beam with the threshold roof beam links together.

According to the vehicle chassis, the chassis side structures are arranged on the left side and the right side, and the battery pack is arranged between the connecting beams on the two sides, so that collision impact can be borne by the connecting beams on the two sides, collision force can be transmitted and dispersed, meanwhile, the side pedal mounting framework on the outer side of the connecting beams can be used for resisting the collision impact, and collision energy absorption can be carried out, so that the collision safety of the battery pack can be well improved, and the improvement of the safety quality of a vehicle is facilitated.

Secondly, through set up inside crossbeam in the battery package, can provide horizontal support, the module etc. in the protection battery package is not atress, can increase the battery package and handle the ability that the side bumped, the security of battery package when increasing the vehicle side bumped. The connecting support, the connecting beam and the threshold beam can be connected together by the part connecting piece, the whole installation of the connecting beams on two sides and the battery pack in the vehicle body can be synchronously realized on the basis of realizing the installation of the battery pack, the integrated design of the part installation structure of the battery pack is realized, the connecting structure between the connecting beam and the vehicle body can be not independently arranged on two sides of the battery pack by utilizing the integrated design, and the reduction of the cost of the whole vehicle installation structure is facilitated.

The invention also proposes a vehicle in which a vehicle chassis as described above is provided.

The vehicle has the same beneficial effects as the vehicle chassis, and the description is omitted here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of a chassis side structure according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a chassis side structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of a chassis side structure according to an embodiment of the present invention as assembled in a vehicle body;

FIG. 4 is a schematic structural view of a connecting beam and a side-pedal mounting framework according to an embodiment of the present invention when a roll-pressing member is used;

FIG. 5 is a schematic view of a connection beam according to an embodiment of the present invention connected to front and rear sub-frames;

fig. 6 is a schematic structural view of a front subframe according to an embodiment of the present invention;

FIG. 7 is a schematic view of a rear subframe according to an embodiment of the present invention;

FIG. 8 is a schematic view of a rear cross member according to an embodiment of the present invention;

FIG. 9 is a schematic view of a rear subframe impact beam and rear subframe crash box according to an embodiment of the invention;

FIG. 10 is a schematic view of a vehicle chassis according to an embodiment of the present invention;

Fig. 11 is a schematic structural view of a battery pack according to an embodiment of the present invention;

FIG. 12 is a schematic view of an arrangement of an inner cross member according to an embodiment of the present invention;

FIG. 13 is a schematic view showing the mating of the inner cross beam, the connecting brackets and the connecting beams according to an embodiment of the present invention;

FIG. 14 is a schematic view illustrating the connection of the first connecting member according to the embodiment of the present invention;

FIG. 15 is a schematic view illustrating the connection of the second connecting member according to the embodiment of the present invention;

reference numerals illustrate:

1. a connecting beam; 2, a side pedal installation framework, 3, a threshold beam, 4, a front auxiliary frame, 5, a rear auxiliary frame and 6, a battery pack;

1a, beam body outer walls, 1b, beam body reinforcing ribs, 1c, connecting sections, 2a, side pedal mounting surfaces, 2b, skeleton outer walls, 2c, skeleton reinforcing ribs, 401, front subframe longitudinal beams, 402, front subframe front cross beams, 403, front subframe middle cross beams, 404, front cross beams, 404a, a cross beam main body, 404b, overhanging sections, 405, front subframe anti-collision beams, 406, front subframe energy absorbing boxes, 501, rear subframe longitudinal beams, 502, rear subframe front cross beams, 503, rear subframe rear cross beams, 504, rear cross beams, 5041, flat sections, 5042, bending sections, 505, rear subframe anti-collision beams, 506, rear subframe energy absorbing boxes, 5a, rear subframe mounting points, 601, connecting brackets, 602, inner cross beams, 603, side frames;

100. 200 parts of threaded pipes, 300 parts of first connecting pieces, 300 parts of threaded sleeves, 400 parts of second connecting pieces;

A. The device comprises a framework outer wall, a framework outer wall bottom part, a Q battery pack installation space, a G framework inner cavity, a M beam body inner cavity.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the components may be fixedly connected, detachably connected or integrally connected, mechanically connected or electrically connected, directly connected or indirectly connected through an intermediate medium, or communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in combination with specific cases.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The present embodiment relates to a chassis side structure, which is preferably applicable to a new energy vehicle type with a battery pack 6, and is particularly applicable to a pure electric vehicle type, and the chassis side structure can facilitate the lightweight design of the vehicle, and can improve the comprehensive quality of the whole vehicle.

As shown in fig. 1 to 3, the chassis side structure of the present embodiment includes a connecting beam 1 provided below a rocker 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 provided on a side of the connecting beam 1 facing the outside of the vehicle in the left-right direction of the vehicle.

The side step mounting frame 2 extends in 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, and the side step mounting frame 2 is integrally formed with the connecting beam 1.

At this time, through the connecting beam 1 of lateral part and the side pedal installation framework 2 of integrated into one piece on the connecting beam 1, can make the side pedal installation framework 2 as the side pedal assembly basis simultaneously, also can play the collision energy-absorbing effect as side collision energy-absorbing structure, can realize a dual-purpose to save the side pedal installation framework, and then be favorable to realizing the lightweight design of automobile body, and can promote the comprehensive quality of whole car.

Based on the above-described overall description, specifically, based on the above-described arrangement of the side step mounting skeleton 2, by mounting the side step panel, the side step garnish, and the like on the side step mounting surface 2a, a side step assisting the driver in getting on and off the vehicle can be formed.

In addition, as a preferred embodiment, the deformation capacity of the side step mounting frame 2 in the vehicle lateral direction may be set to be larger than the deformation capacity of the connection beam 1 in the vehicle lateral direction when the vehicle is actually implemented. The deformation capacity can be characterized by the deformation amount in the set direction when an object (such as the side step mounting frame 2 or the connecting beam 1) receives a collision force of a preset threshold, and the larger the deformation amount, the larger the deformation capacity. In addition, in popular terms, the deformation capability of the side pedal installation framework 2 is larger than that of the connecting beam 1, namely the transverse (i.e. the left-right direction of the whole vehicle) rigidity of the side pedal installation framework 2 is smaller than that of the connecting beam 1.

It can be understood that, in this embodiment, the deformation capability of the side pedal installation framework 2 in the left-right direction of the whole vehicle is greater than the deformation capability of the connecting beam 1 in the left-right direction of the whole vehicle, so that the side pedal installation framework 2 preferentially collapses and absorbs energy when the vehicle bumps on one hand, so as to reduce the collision force transferred to the inside of the vehicle body, and on the other hand, the larger transverse rigidity of the connecting beam 1 can be utilized, so that the collision deformation of the connecting beam 1 is reduced, and the internal structure of the vehicle body can be better protected.

In this embodiment, as a preferred embodiment, the integrally formed connection beam 1 and the side step mounting frame 2 may be, for example, extruded aluminum profiles, and at this time, in terms of a specific structure, as also shown in fig. 2, the above-described side step mounting frame 2 has a frame outer wall 2b that is shaped in a surrounding manner to have a frame inner cavity G, and a frame reinforcing rib 2c provided in the frame inner cavity G. Meanwhile, the connecting beam 1 has a beam body outer wall 1a formed with a beam body inner cavity M, and beam body reinforcing ribs 1b disposed in the beam body inner cavity M.

At this time, the preparation can be facilitated by making the connecting beam 1 and the side pedal installation framework 2 adopt extruded aluminum profiles, and the side pedal installation framework 2 and the connecting beam 1 are both formed with an inner cavity, and meanwhile, the reinforcing ribs are arranged in the inner cavity, so that the structural strength of the connecting beam 1 and the side pedal installation framework 2 can be ensured, and the use effect of the connecting beam 1 and the side pedal installation framework 2 can be improved.

In this embodiment, based on that the rigidity of the side pedal installation framework 2 is smaller than that of the connection beam 1, as one possible implementation manner, with continued reference to fig. 2, for example, the framework reinforcing ribs 2c may be arranged along the up-down direction of the whole vehicle, the beam reinforcing ribs 1b may be arranged along the left-right direction of the whole vehicle, and at the same time, the bottom portion of the outer wall 2b of the framework may be arranged in a wave-folded shape along the left-right direction of the whole vehicle.

Wherein the bottom portion of the outer wall 2b of the skeleton is in a corrugated shape, namely, the position indicated by the reference numeral A in FIG. 2. And through setting up skeleton strengthening rib 2c to arrange along the whole car up-and-down direction, set up beam body strengthening rib 1b to arrange along the whole car left-and-right direction to make the bottom part of skeleton outer wall 2b become the wave in the whole car left-and-right direction and roll over the form setting, alright when guaranteeing that the side is stepped on installation skeleton 2 and tie-beam 1 structural strength, realize that the rigidity of side and stepped on installation skeleton 2 is less than tie-beam 1.

In addition to the above embodiments, as another possible embodiment, for example, the thicknesses of the outer wall 2b and the rib 2c may be made smaller than the thicknesses of the outer wall 1a and the rib 1b, so that the rigidity of the side step mounting frame 2 can be made smaller than the rigidity of the connecting beam 1.

In the specific implementation, preferably, as shown in fig. 2, the two implementation forms are adopted at the same time, so that the connecting beam 1 and the side pedal installation framework 2 have better structural strength, and can meet the design requirement of transverse rigidity of the connecting beam and the side pedal installation framework.

In this embodiment, instead of using an extruded aluminum profile, it is of course possible to use a steel profile or a steel roller for the integrally formed connecting beam 1 and the side step mounting frame 2. When the steel profile is adopted, the cross sections of the connecting beam 1 and the side pedal installation framework 2 can still be shown in fig. 2, and when the steel rolling piece is adopted, the cross sections of the connecting beam 1 and the side pedal installation framework 2 can be shown in fig. 4, and at the moment, a beam body inner cavity M is still formed in the connecting beam 1, and a framework inner cavity G is formed in the side pedal installation framework 2.

In this embodiment, as a possible implementation manner, the front and rear ends of the connecting beam 1 may be connected to the rocker beam 3 on the same side, for example, and they may be specifically connected by welding, screwing, riveting, or the like. At this time, the front and rear ends of the connecting beam 1 are made to be connected to the threshold beam 3, the arrangement of the connecting beam 1 on both sides in the vehicle body can be achieved, and the reliability of the arrangement of the connecting beam 1 in the vehicle body can be ensured.

However, as another possible embodiment, as shown in fig. 5, the vehicle chassis of the present embodiment having the side structures of the connecting beam 1 and the side step mounting frame 2 described above, etc., 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, in addition to the rocker beam 3 having both ends of the connecting beam 1 connected to the same side, and the connecting beam 1 is connected between the front subframe 4 and the rear subframe 5.

When the connecting beam 1 is connected between the front and rear sub-frames, the chassis side structure of the present embodiment is one of the structures shown in fig. 5.

The front sub-frame 4 is disposed below the front cabin in the vehicle body, and the rear sub-frame 5 is disposed below the rear floor in the vehicle body. In addition, based on the above, the two-side connecting beams 1 are disposed between the front and rear sub-frames, and at this time, it should be noted that the conventional vehicle body mainly includes a load-bearing vehicle body and a non-load-bearing vehicle body, and the differences between the two are mainly in terms of structure, weight, riding comfort, and the like.

The non-bearing type vehicle body is generally composed of a frame girder and a vehicle body, the frame is used for installing an engine, a gearbox, a suspension and other parts, the vehicle body is only used for providing a closed environment required by driving and has no bearing function, and meanwhile, the non-bearing type vehicle body is large in weight, high in gravity center, relatively poor in operability and low in travelling comfort on a paved road. But because the frame girder can provide very good rigidity, chassis intensity is higher, and anti jolt performance is good, has better stationarity and security to also easily repacking.

The bearing type vehicle body is not provided with a rigid frame, parts in the vehicle are directly arranged on the vehicle body, the whole vehicle body is used as a force bearing structure to bear the action of various load forces, and meanwhile, the bearing type vehicle body is light in weight, low in gravity center, good in operability and easy to assemble, and can obtain better comfortableness when the vehicle runs on a paved road. However, the torsional rigidity and the bearing capacity of the bearing type car body are weaker, and the whole safety is relatively poor because the bearing type car body is not provided with a rigid car frame and is usually only reinforced at the parts such as the car head, the side walls, the car tail, the bottom plate and the like.

Thus, in order to fully utilize the advantages of the load-bearing vehicle body and to improve the disadvantages of the load-bearing vehicle body for new energy vehicle types, particularly for pure electric vehicle types, the present embodiment therefore creatively connects the connecting beam 1 between the front and rear sub-frames in the vehicle chassis structure, and thus makes the vehicle chassis of the present embodiment a chassis structure developed based on the load-bearing vehicle body.

It can be appreciated that by adopting the bearing type vehicle body structure with the front auxiliary frame and the rear auxiliary frame, the embodiment can utilize the characteristic of smaller weight of the bearing type vehicle body to realize the light weight of the vehicle body chassis, thereby improving the cruising ability of the whole vehicle. Meanwhile, through the arrangement of the connecting beam 1 and the connection of the front auxiliary frame and the rear auxiliary frame into a whole, the connecting beam 1 can be used for bearing collision impact and transmitting and dispersing collision force when a vehicle collides laterally, so that the safety during side collision is improved.

In the present embodiment, the front subframe 4 has front subframe rails 401 provided on the left and right sides, the rear subframe 5 has rear subframe rails 501 provided on the left and right sides, and as a preferable embodiment, the connecting beam 1 is also located on the side of the front subframe rails 401 and the rear subframe rails 501 located on the same side, which are located outside the vehicle, in the left and right directions of the entire vehicle.

At this time, the connecting beam 1 is located on the side of the front sub-frame rail 401 and the rear sub-frame rail 501 on the same side, which are close to the outside of the vehicle, as shown in fig. 5, which helps to realize the Y-directional cross-section change of the front and rear parts of the load-bearing vehicle body, so that the matching design requirements between the chassis and the vehicle body skeleton in the load-bearing vehicle body can be satisfied.

In this embodiment, as shown in fig. 5 and 6, a front cross member 404 is also provided at the rear of the front subframe 4, and the front end of the connection beam 1 is connected to the end of the front cross member 404, and the rear end of the connection beam 1 is connected to the front end of the rear subframe rail 501.

It should be noted that, as a preferred embodiment, the front cross member 404 may be used as a part of the front subframe 4, and specifically, a front subframe rear cross member located at the rear end of the front subframe 4. However, instead of being a front sub-frame rear cross member, the front cross member 404 of the present embodiment may be connected between the front ends of the side connecting beams 1 and independently of the beam body structure provided to the front sub-frame 4, and in this case, the front cross member 404 may be integrally connected to the side connecting beams 1 as a unitary frame structure and also connected to the front sub-frame 4 to achieve connection between the connecting beams 1 and the front sub-frame 4.

Taking the front cross member 404 as the rear cross member of the front subframe as an example, in the specific implementation, the front subframe 4 of the present embodiment is only used to refer to the front subframe structure in the existing load-bearing vehicle body, and generally, as shown in fig. 6, in addition to the front subframe stringers 401 that are separately disposed on the left and right sides in the front subframe 4, the front subframe front cross member 402 and the front subframe middle cross member 403 are also connected between the front subframe stringers 401 on both sides, and the rear ends of the front subframe stringers 401 on both sides are connected to the front cross member 404 that is the rear cross member of the front subframe.

It should be noted that where the front cross member 404 is provided independently of the front subframe 4, it is typically also connected to the rear ends of the side front subframe rails 401. Further, when the front cross member 404 is provided independently of the front subframe 4, it may be provided selectively as needed for the front subframe rear cross member in the front subframe 4.

As further shown in fig. 6, the front subframe 4 may also be provided with a front subframe impact beam 405 connected to the front subframe side members 401 on both sides, and the front subframe impact beam 405 is connected to the front ends of the front subframe side members 401 on both sides, specifically, through a front subframe energy absorbing box 406.

In the front subframe 4 of the present embodiment, the front cross member 404 also has an overhanging portion 404b extending to the vehicle exterior side in the vehicle lateral direction, and the front end of the connecting beam 1 is connected to the overhanging portion 404b, and thus is connected to the front subframe side member 401 via the front cross member 404.

In this case, for example, the front cross member 404 may be configured to have a cross member main body 404a located in the middle, the outer extension 404b may be connected to an end of the cross member main body 404a, and the rear ends of the front sub-frame side members 401 on each side of the front sub-frame 4 may be connected to the cross member main body 404 a.

It will be appreciated that by providing the overhanging section 404a in the front cross member 404, it is possible to facilitate the connection with the two-sided connecting beam 1. Meanwhile, still referring to fig. 5, by connecting the front sub-frame rail 401 on the left and right sides in the front sub-frame 4 with the cross member main body 404a in the front cross member 404, it also contributes to achieving a Y-directional (left and right directions of the whole vehicle) cross-sectional change of the front portion of the load-bearing vehicle body, i.e., bending of the connecting beam 1 on each side and the front sub-frame rail 401 occurs at the joint position therebetween, and thus the vehicle body Y-directional cross-sectional dimension becomes smaller at the front sub-frame 4.

The change of the Y-direction section of the front part of the vehicle body obviously basically has the same front and back of the Y-direction section of the frame girder in the non-bearing vehicle body, and the embodiment also meets the matching design requirement between the chassis and the vehicle body framework in the bearing vehicle body through the dimensional change of the Y-direction section of the front part of the vehicle body.

In the present embodiment, as a preferred embodiment, as shown in fig. 5 and 7, a connecting section 1c is provided at the rear end of the connecting beam 1, the connecting section 1c is inclined toward the rear side sub-frame rail 501, and the connecting beam 1 is connected to the front end of the same-side rear sub-frame rail 501 via the connecting section 1 c.

At this time, by providing the inclined connecting section 1c at the rear end of each side connecting beam 1, the connection between the connecting beam 1 and the rear sub-frame rail 501 can be facilitated, and the connecting section 1c is inclined to the rear sub-frame rail 501 side, so that the Y-directional cross-section variation of the rear part of the load-bearing vehicle body can be facilitated similarly to the design of the above-described overhanging section 404b, so that not only the matching design requirement between the chassis and the vehicle body frame in the load-bearing vehicle body is satisfied, but also one of the main differences from the non-load-bearing vehicle body is made.

In this embodiment, as shown in fig. 5 and 7, in the specific implementation, the rear subframe 5 is just like a rear subframe structure in an existing load-bearing vehicle body, and in terms of structure, as a preferred implementation, a rear subframe front cross member 502 and a rear subframe rear cross member 503 are connected between the rear subframe longitudinal members 501 on both sides, and further, a rear cross member 504 is also connected between the rear subframe longitudinal members 501 on both sides and the connection beam 1, that is, between the connection positions of the rear subframe longitudinal members 501 on both sides and the connection section 1c, as similar to the existing rear subframe structure.

At this time, it can be understood that, by the above arrangement of the rear cross member 504, not only the structural strength and rigidity of the front portion of the rear subframe 5 can be increased, but also the rear cross member 504 can be arranged between the connection positions of the two side connection sections 1c and the rear subframe longitudinal member 501, so that the connection strength of the rear cross member 504 can be ensured and the dynamic rigidity of the front portion of the rear subframe 5 can be better improved by connecting the end portions of the rear cross member 504 to the connection positions between the connection sections 1c of the respective sides and the rear subframe longitudinal member 501.

In particular, the rear cross member 504 of the present embodiment may also be an integrally formed closed structure, for example, so as to have a high structural strength. In addition, in order to further increase the strength of the rear cross member 504 and to facilitate the installation of the rear end of the battery pack 6, the rear cross member 504 of the present embodiment may be designed to be arranged in a downward arch along the up-down direction of the entire vehicle, with a straight section 5041 in the middle, and bending sections 5042 on the left and right sides, as shown in fig. 8. The bending sections 5042 on both sides are disposed in an upward-inclined manner, and are respectively connected to the rear sub-frame rails 501 on the same side.

In this embodiment, as a preferred embodiment, referring still to fig. 7, 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 rail 501, that is, at the connection position between each side connecting section 1c and the rear subframe rail 501.

In practice, the rear subframe mounting point 5a may generally be a connection hole, and a sleeve may be fitted in the connection hole to connect the rear subframe 5 to the vehicle body by bolts. Further, it can be understood that by providing the rear subframe mounting point 5a at the connection position between the connection beam 1 and the rear subframe rail 501, the rigidity of the mounting position of the rear subframe 5 can be increased, and further, the dynamic rigidity of the assembled rear subframe 5 can be improved.

In this embodiment, which is also shown in fig. 5 and 7, a rear sub-frame collision preventing member 505 connected to both side rear sub-frame side members 501 is provided at the rear end of the rear sub-frame 5, as a preferred embodiment, unlike the conventional rear sub-frame structure. Thus, it can be appreciated that by providing the rear subframe impact beam 505 at the rear end of the rear subframe 5, on the one hand, it can promote the rear impact force transmission performance of the rear subframe 5, and can make the impact force better dispersed to the rear subframe beams 501 on both sides via the rear subframe impact beam 505, so as to be transmitted forward along the rear subframe beams 501, avoiding the forces per unit location, the impact force being difficult to disperse, and causing excessive deformation. On the other hand, by providing the rear sub-frame collision avoidance beam 505, the rear sub-frame collision avoidance beam 505 can be used as a pedestrian at the rear of the vehicle to avoid being involved in the beam, and thus the safety in the reversing process can be improved.

In the specific implementation, in conjunction with the illustration of fig. 9, the rear subframe collision avoidance beam 505 may structurally refer to the front subframe collision avoidance beam 405 in the front subframe 4, and may be a sheet metal stamping structure, or may also be an aluminum alloy extrusion. Meanwhile, on the basis of the arrangement of the rear subframe collision-preventing beams 505, the rear ends of the rear subframe side beams 501 on both sides are preferably connected with the rear subframe energy-absorbing boxes 506, and the rear subframe collision-preventing beams 505 are particularly connected with the rear subframe energy-absorbing boxes 506 on both sides.

At this time, the rear subframe crash box 506 is similar to the front subframe crash box 406 of the front subframe 4, and is constructed by a conventional crash box structure used in the existing vehicle body. Moreover, it can be appreciated that the rear subframe rear impact beam 505 is connected to the rear subframe rail 501 via the rear subframe energy absorber 506, which is capable of collapsing and absorbing energy via the rear subframe energy absorber 506 to facilitate further improvement of vehicle rear impact safety.

According to the chassis side structure, through the connecting beam 1 at the side and the side pedal installation framework 2 integrally formed with the connecting beam 1, the side pedal installation framework 2 serves as a side pedal assembly foundation and can serve as a side collision energy absorption structure to play a role in collision energy absorption, one side can be used for two purposes, the side pedal installation framework can be saved, light weight design of a vehicle can be facilitated, comprehensive quality of the whole vehicle can be improved, and the chassis side structure has good practicability.

Example two

The present embodiment relates to a vehicle chassis, which is shown in fig. 5 in combination with fig. 10, and which is provided with the chassis side structure of the first embodiment on both the left and right sides thereof, and in which a battery pack installation space Q is formed between the both-side connection beams 1, and in which a battery pack 6 is provided. The left and right sides of the battery pack 6 are also connected to the corresponding side connection beams 1, respectively.

At this time, still referring to the description in the first embodiment, in the vehicle chassis of the present embodiment, the connection beams 1 on both sides may still be connected between the front subframe 4 and the rear subframe 5, and the front cross member 404 may be provided on the rear side of the front subframe 4, and the rear cross member 504 may be provided on the front portion of the rear subframe 5, as a preferred embodiment. In this way, the battery pack installation space Q is also specifically formed between the front beam 404, the rear beam 504 and the connection beams 1 on both sides, so that the annular frame structure formed by the surrounding structures of the front beam 404, the rear beam 504 and the connection beams 1 on both sides can be a rigid encircling structure adapted to the shape of the battery pack 6, and the collision safety of the battery pack 6 can be better improved.

In this embodiment, as further shown in fig. 11 to 13, as a preferred embodiment, connecting brackets 601 are provided on the left and right sides of the battery pack 6, respectively, and each side connecting bracket 601 is connected below the same side connecting beam 1, thereby realizing loading of the battery pack 6 in the vehicle chassis. Further, the connection between the battery pack 6 and the connection beam 1 can be easily achieved by the provision of the both side connection brackets 601.

In the present embodiment, an inner cross member 602 extending in the vehicle lateral direction is also provided in the battery pack 6 as a preferred embodiment, and the inner cross member 602 is at least partially overlapped with the projections of the connection beams 1 on both sides in the vehicle lateral direction. In this way, by arranging the internal beam 602 overlapping with the projection of the connecting bracket 601 inside the battery pack 6, the supporting effect of the internal beam 602 can be utilized to ensure the supporting strength of the connecting beam 1 and the threshold beam 3 at the side, thereby being beneficial to further increasing the safety of the battery pack 6.

Specifically, as a preferred embodiment, the internal beams 602 located in the battery pack 6 may be arranged in a plurality of spaced-apart manner, and at the same time, each internal beam 602 may be arranged to at least partially overlap with the projection of the connection brackets 601 on both sides in the left-right direction of the entire vehicle. In this way, it can be understood that the projection of the internal beam 602 in the battery pack 6 and the connection bracket 601 in the left-right direction of the whole vehicle are overlapped, so that the arrangement strength of the side connection bracket 601 can be ensured while the internal beam 602 has a better supporting effect, thereby being beneficial to increasing the reliability of the assembly of the battery pack 6.

In this embodiment, as a preferred implementation manner, the side frames 603 are provided on both the left and right sides of the battery pack 6, the connecting brackets 601 on the left and right sides of the battery pack 6 are fixedly connected to the side frames 603 on the corresponding sides, and the internal cross members 602 are connected between the side frames 603 on both sides, and preferably, the side frames 603, the connecting brackets 601 and the internal cross members 602 are all made of extruded aluminum profiles.

Thus, it can be understood that the connecting brackets 601 on each side are connected to the side frames 603 on the same side, and the internal cross members 602 are positioned between the side frames 603 on both sides, and the side frames 603, the connecting brackets 601 and the internal cross members 602 are 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 members 602, thereby helping to ensure the rigidity of the battery pack 6 as a whole.

When the side frames 603 and the connection bracket 601 are both made of extruded aluminum, it is preferable that the connection bracket 601 and the side frames 603 be integrally formed. In this way, the preparation of the connection bracket 601 and the side frame 603 can be facilitated, and at the same time, the structural strength of the connection bracket 601 and the side frame 603 can be ensured, and the reliability of the assembled battery pack 6 can be ensured.

It should be noted that, in addition to the side frames 603 having the left and right sides, similar frame structures are provided at the front and rear ends of the battery pack 6, and extruded aluminum profiles may be generally used for the front and rear end frame structures. In particular, as shown in fig. 13, the side frames 603 may be configured to have a triangular cross section, for example, so as to better increase the strength of the side frames 603 by utilizing the characteristic of strong triangular structure.

In addition to the use of extruded aluminum profiles for the side frames 603, the connection brackets 601 and the inner cross members 602, it should be noted that, of course, it is possible to use extruded aluminum profiles for a portion of the side frames 603, the connection brackets 601 and the inner cross members 602 according to the design requirements.

In addition, in this embodiment, besides the connection between the inner beam 602 and the connecting bracket 601 through the side frames 603, it is possible to ensure that the projections between the inner beam 602 and the connecting brackets 601 at least partially overlap, if the embodiment is implemented such that the ends of the inner beam 602 penetrate the side frames 603 and are directly connected with the connecting brackets 601.

In this embodiment, based on the arrangement of the connection brackets 601 on the left and right sides of the battery pack 6, in practical implementation, each side connection bracket 601 may be generally connected below the connection beam 1 on the same side through a connection member, so as to implement the assembly of the battery pack 6. At this time, the above-mentioned connecting member may be specifically connected with a screw sleeve provided in the connecting beam 1, and in practice, the present embodiment may also be applied to a connecting assembly for assembling the battery pack 6, in which a part of the connecting member may connect the battery pack 6 and the connecting beam 1 together, and a part of the connecting member may connect the battery pack 6, the connecting beam 1, and the threshold beam 3 together.

So, make partial connecting piece can link together battery package 6, tie-beam 1 and threshold roof beam 3, alright on the basis of realizing the installation of battery package 6, realize the installation of the whole that both sides tie-beam 1 and battery package 6 constitute in the automobile body in step, and realize the integrated design of the partial mounting structure of battery package 6. By utilizing the integrated design, the connecting structure between the connecting beam 1 and the vehicle body can be not independently arranged on two sides of the battery pack 6, thereby being beneficial to the reduction of the cost of the whole vehicle mounting structure.

In particular, the above-mentioned connection member may be constituted by, for example, the first connection member 200 in fig. 14 and the second connection member 400 in fig. 15, and accordingly, a threaded sleeve provided in the connection beam 1 corresponding to the first connection member 200 may be referred to as a first threaded sleeve 100, and a threaded sleeve provided in the connection beam 1 corresponding to the second connection member 400 may be referred to as a second threaded sleeve 300. Also, the top of the second screw grommet 300 is also provided to protrude from the connecting beam 1 and is disposed in correspondence with the battery pack mounting structure provided in the rocker beam 3.

Through the cooperation of the above first connecting member 200 and the first threaded sleeve 100, the present embodiment can connect the battery pack 2 and the connecting beam 1 together, and at the same time, the battery pack 2, the connecting beam 1 and the threshold beam 3 can be connected together through the above second connecting member 400 passing through the second threaded sleeve 300 and being connected to the battery pack mounting structure in the threshold beam 3.

In this embodiment, it should be noted that, as a preferred embodiment, the second connecting members 400 for connecting the battery pack 2, the connecting beam 1 and the threshold beam 3 may be generally distributed near the front and rear four corners of the battery pack 2, and the first connecting members 200 for connecting only the battery pack 2 and the connecting beam 1 may be provided as a plurality of members spaced apart in the front and rear direction of the entire vehicle.

In addition, in the embodiment, the first threaded pipe 100 or the second threaded sleeve 300 may have a pipe body structure having a connecting thread formed on an inner wall thereof, and the first connector 200 and the second connector 400 may have bolts having a proper length. The battery pack mounting structure provided in the rocker beam 3 may employ projection nuts or the like to achieve the screw connection with the second connector 400.

According to the vehicle chassis of the embodiment, the chassis side structures in the first embodiment are arranged on the left side and the right side, and the battery pack 6 is arranged between the connecting beams on the two sides, so that not only can the connecting beams 1 on the two sides be used for bearing collision impact and transmitting and dispersing collision force, but also the side pedal mounting framework 2 on the outer side of the connecting beam 1 can be used for resisting collision impact and absorbing collision energy, so that the collision safety of the battery pack 6 can be well improved, and the safety quality of a vehicle can be improved.

In addition, in the vehicle chassis of the present embodiment, on the basis of providing the two-side connecting beams 1, particularly by connecting the two-side connecting beams 1 between the front and rear sub-frames, the front and rear sub-frames can be connected via the two-side connecting beams 1 on the basis of the conventional load-bearing vehicle body, so that the load-bearing vehicle body structure having the front and rear sub-frames can be adopted to realize the weight reduction of the vehicle body by utilizing the characteristic of the smaller weight of the load-bearing vehicle body, and the cruising ability of the whole vehicle can be improved.

Through the setting of both sides tie-beam 1 to link to each other preceding, back sub-frame, and by preceding crossbeam 404, rear cross-beam 504 and both sides tie-beam 1 jointly inject battery package installation space Q, the chassis structure of this embodiment also can constitute battery package annular frame structure with the help of the connection setting of tie-beam 1. Can make battery package 6 can follow the annular frame structure and move together at the time of the collision, can reduce the collision impact that battery package 6 received, the collision security of multiplicable battery package 6 to can promote whole car security quality.

In addition, it should be noted that, in the chassis structure of the vehicle in this embodiment, since the front and rear ends of the chassis are still the front and rear sub-frames, the sub-frame structure is smaller than the Y-directional cross section of the frame in the non-load-bearing vehicle body, and the sub-frame position longitudinal beam is a curved longitudinal beam structure, the chassis structure of this embodiment is a structural innovation of the sub-frame, and is significantly different from the conventional non-load-bearing frame girder structure. Specifically, the front subframe and the rear subframe in the embodiment are still separate units, and the front-rear connection connecting beam 1 is further added on the basis of the front subframe and the rear subframe in the bearing type vehicle body, and the front-rear connection connecting beam is not an integral girder structure in the bearing type vehicle body.

Of course, in the implementation form of connecting the connecting beam 1 with the front and rear sub-frames, and due to the integral structure of the front and rear sub-frames connected by the connecting beam 1, the embodiment, as mentioned above, not only can utilize the characteristics of the bearing type vehicle body structure to reduce the weight of the vehicle body so as to increase the whole vehicle endurance, but also can form the annular protection frame of the battery pack so as to better improve the collision safety of the battery pack 6. Therefore, the vehicle body structure not only improves the defects of the bearing type vehicle body structure, but also has the advantages of the non-bearing type vehicle body structure, and the overall quality of the vehicle can be well improved, so that the vehicle body structure has good practicability.

Example III

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

It should be noted that, on the basis of the vehicle chassis in the second embodiment, when the vehicle in the second embodiment is assembled in a final assembly, the sub-frame which is still the bottom is assembled to the vehicle body in the same manner as the existing load-bearing vehicle body, and the upper vehicle body skeleton is the load-bearing main body in the vehicle, and the chassis accessories are assembled to the vehicle body by means of the front sub-frame and the rear sub-frame. In addition, when the vehicle collides, the upper vehicle body framework, the front auxiliary frame, the rear auxiliary frame and the connecting beam 1 in the chassis are involved in the absorption and transmission of collision force, and the transmission and the energy absorption are not carried out by the frame girder independently like a non-bearing vehicle body.

The vehicle of the present embodiment is provided with the vehicle chassis of the second embodiment, and on the one hand, the vehicle can use the arrangement of the side connecting beam 1 and the side step mounting frame 2 to increase the safety of the battery pack 6. On the other hand, the connecting beams 1 are specifically arranged on the two sides, and particularly the connecting beams 1 are connected between the front auxiliary frame and the rear auxiliary frame, so that the front auxiliary frame and the rear auxiliary frame can be connected through the connecting beams 1 on the two sides on the basis of a traditional bearing type automobile body, the automobile body is light, the whole automobile endurance can be improved, the collision impact received by the battery pack 6 can be reduced, the collision safety of the battery pack 6 is improved, the safety quality of the whole automobile can be improved, and the automobile has good practicability.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A vehicle chassis, characterized by:

The vehicle chassis comprises a vehicle body, wherein the left side and the right side of the vehicle chassis are respectively provided with a chassis side structure, the chassis side structures comprise connecting beams (1) arranged below a threshold beam (3) in the vehicle body, the connecting beams (1) extend along the front-back direction of the whole vehicle and along the left-right direction of the whole vehicle, one side, facing the outside of the vehicle, of each connecting beam (1) is provided with a side pedal installation framework (2), a battery pack installation space (Q) is formed between the connecting beams (1) on two sides, and a battery pack (6) is arranged in the battery pack installation space (Q);

the side pedal installation framework (2) extends along the front-back direction of the whole vehicle, a side pedal installation surface (2 a) is arranged at the top of the side pedal installation framework (2), and the side pedal installation framework (2) and the connecting beam (1) are integrally formed;

the connecting beam (1) is connected between a front auxiliary frame (4) positioned at the front part of the vehicle and a rear auxiliary frame (5) positioned at the rear part of the vehicle, and the left side and the right side of the battery pack (6) are respectively connected to the connecting beam (1) at the corresponding sides;

Wherein, the left and right sides of battery package (6) are equipped with linking bridge (601) respectively, each side linking bridge (601) all connect in homonymy through a plurality of connecting pieces the below of tie beam (1), and the left and right sides of battery package (6) all have lateral part frame (603), are located the left and right sides of battery package (6) linking bridge (601) link firmly on lateral part frame (603) of corresponding side.

2. The vehicle chassis of claim 1, wherein:

the deformation capacity of the side pedal installation framework (2) in the left-right direction of the whole vehicle is larger than that of the connecting beam (1).

3. The vehicle chassis of claim 2, wherein:

The connecting beam (1) and the side pedal installation framework (2) are extruded aluminum profiles;

The side pedal installation framework (2) is provided with a framework outer wall (2 b) which is formed with a framework inner cavity (G) in a surrounding way, and a framework reinforcing rib (2 c) arranged in the framework inner cavity (G);

the connecting beam (1) is provided with a beam body outer wall (1 a) which is formed with a beam body inner cavity (M) in a surrounding mode, and a beam body reinforcing rib (1 b) which is arranged in the beam body inner cavity (M).

4. A vehicle chassis according to claim 3, characterized in that:

The framework reinforcing ribs (2 c) are arranged along the up-down direction of the whole vehicle, the beam reinforcing ribs (1 b) are arranged along the left-right direction of the whole vehicle, and the bottom part of the framework outer wall (2 b) is arranged in a wave-folded shape along the left-right direction of the whole vehicle, and/or,

The thicknesses of the framework outer wall (2 b) and the framework reinforcing ribs (2 c) are smaller than those of the beam outer wall (1 a) and the beam reinforcing ribs (1 b).

5. The vehicle chassis of any one of claims 1 to4, wherein:

The front auxiliary frame (4) is provided with front auxiliary frame longitudinal beams (401) which are respectively arranged at the left side and the right side, and the rear auxiliary frame (5) is provided with rear auxiliary frame longitudinal beams (501) which are respectively arranged at the left side and the right side;

in the left-right direction of the whole vehicle, the connecting beam (1) is positioned on the same side of one side, which is close to the outside of the vehicle, of the front auxiliary frame longitudinal beam (401) and the rear auxiliary frame longitudinal beam (501).

6. The vehicle chassis of claim 5, wherein:

The rear side of the front auxiliary frame (4) is provided with a front cross beam (404), the front cross beam (404) is provided with an overhanging section (404 b) extending to one side outside the vehicle along the left-right direction of the whole vehicle, the front end of the connecting beam (1) is connected with the overhanging section (404 b) and is connected with the front auxiliary frame longitudinal beam (401) through the front cross beam (404), and/or,

The rear end of the connecting beam (1) is provided with a connecting section (1 c), the connecting section (1 c) inclines to one side of the rear auxiliary frame longitudinal beam (501) from front to back along the front direction and the rear direction of the whole vehicle, and the connecting beam (1) is connected with the front end of the rear auxiliary frame longitudinal beam (501) on the same side through the connecting section (1 c).

7. The vehicle chassis of claim 5, wherein:

A rear cross beam (504) is arranged on the front side of the rear auxiliary frame (5), the end part of the rear cross beam (504) is connected with the position where the rear auxiliary frame longitudinal beam (501) is connected with the connecting beam (1), and/or,

A rear subframe mounting point (5 a) for connecting the rear subframe (5) and the vehicle body is arranged at the connecting position between the connecting beam (1) and the rear subframe longitudinal beam (501).

8. The vehicle chassis of claim 1, wherein:

an internal beam (602) extending along the left-right direction of the whole vehicle is arranged in the battery pack (6), the projection of the internal beam (602) and the connecting beams (1) at two sides in the left-right direction of the whole vehicle are at least partially overlapped, and/or,

And part of the connecting piece connects the connecting bracket (601), the connecting beam (1) and the threshold beam (3) together.

9. A vehicle, characterized in that:

the vehicle is provided with the vehicle chassis according to claim 8.