CN220948171U - Vehicle body chassis structure and vehicle - Google Patents

Abstract

The utility model provides a vehicle body chassis structure and a vehicle, wherein the vehicle body chassis structure comprises a front auxiliary frame, a rear auxiliary frame and a connecting beam connected between the front auxiliary frame and the rear auxiliary frame; the front subframe has front subframe side members that are provided separately on both sides, the rear subframe has rear subframe side members that are provided separately on both left and right sides, and at least one of the front subframe side member and the rear subframe side member has two side members that extend in the front-rear direction of the entire vehicle. According to the utility model, through the double-channel force transmission structure on the front auxiliary frame and the rear auxiliary frame, the collision force transmission capacity of the front auxiliary frame and the rear auxiliary frame can be increased, so that the collision safety of the whole vehicle can be improved.

Description

Vehicle body chassis structure and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a vehicle body chassis structure. The utility model also relates to a vehicle provided with the vehicle body chassis structure.

Background

The auxiliary frame serves as an important structure in a chassis suspension of a vehicle, is an intermediate buffer body for connecting the suspension with a vehicle body, and is also a mounting platform for components such as a driving assembly, a swing arm, a stabilizer bar, a steering gear and the like. In addition, as the requirements of people on the collision safety of vehicles are increasing, the auxiliary frame is one of main structures capable of participating in the collision of vehicles, and the capability of the auxiliary frame to cope with the collision is particularly important. However, the existing auxiliary frame still has the defects of single collision force transmission form, poor collision force transmission effect and the like, thereby being unfavorable for the improvement of the collision safety of the whole vehicle.

Disclosure of utility model

In view of the above, the present utility model aims to provide a chassis structure of a vehicle body, so as to help to improve the collision safety of the whole vehicle.

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

A vehicle body chassis structure comprising a front subframe, a rear subframe, and a connecting beam connected between the front subframe and the rear subframe;

The front subframe has front subframe side members that are provided separately on both sides, the rear subframe has rear subframe side members that are provided separately on both left and right sides, and at least one of the front subframe side member and the rear subframe side member has two side members that extend in the front-rear direction of the entire vehicle.

Further, two of the front subframe stringers on each side include an upper stringer and a lower stringer arranged up and down;

The front ends of the upper longitudinal beam and the lower longitudinal beam on each side are connected with the front cross beam of the front auxiliary frame, and the rear ends of the upper longitudinal beam and the lower longitudinal beam on each side are connected with the rear cross beam positioned at the rear part of the front auxiliary frame;

The connecting beam is connected with the front auxiliary frame through the rear cross beam.

Further, the front sections of the upper longitudinal beam and the lower longitudinal beam on each side are provided with crumple sections, and the crumple sections can be bent and deformed when the auxiliary frame longitudinal beam receives a frontal collision force not lower than a preset threshold value, and guide the front sections of the upper longitudinal beam and the lower longitudinal beam to crumple; and/or the number of the groups of groups,

And supporting beams which are arranged along the up-down direction of the whole vehicle are connected between the lower longitudinal beam and the upper longitudinal beam on each side.

Further, the two longitudinal beams of the rear auxiliary frame longitudinal beam at each side comprise an inner longitudinal beam and an outer longitudinal beam which is arranged at one side of the inner longitudinal beam facing the outside of the vehicle along the left-right direction of the whole vehicle;

The two sides of the outer longitudinal beam extend along the front-rear direction of the whole vehicle, and the outer longitudinal beams on each side are connected between the front end and the rear end of the inner longitudinal beam on the same side.

Further, a rear auxiliary frame anti-collision beam is arranged at the rear end of the rear auxiliary frame, rear auxiliary frame energy-absorbing boxes are connected to the rear ends of the inner longitudinal beams at two sides, and the rear auxiliary frame anti-collision beam is connected with the rear auxiliary frame energy-absorbing boxes at two sides.

Further, the middle parts of the outer longitudinal beams at the two sides are arched upwards along the up-down direction of the whole vehicle, and the tops of the arched parts of the outer longitudinal beams at the two sides are flat sections arranged along the front-back direction of the whole vehicle; and/or the number of the groups of groups,

And the rear auxiliary frame energy absorption boxes at each side and the outer longitudinal beam at the same side are arranged in a straight line when seen from the upper and lower directions of the whole vehicle.

Further, the connecting beams are respectively arranged at the left side and the right side, and the rear ends of the connecting beams at each side are connected with the front ends of the rear auxiliary frame longitudinal beams at the same side;

The front auxiliary frame, the rear auxiliary frame and the connecting beams on two sides are connected to form an annular structure, and a battery pack installation space is formed in the annular structure.

Further, a front cross member is connected between the positions where the rear sub-frame side members on both sides are connected to the connecting beam; and/or the number of the groups of groups,

In the left-right direction of the whole vehicle, the connecting beams on each side are positioned on the same side on 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 lengths of the connecting beams at the two sides along the front and rear directions of the whole vehicle are adjustable, and fixing structures are respectively arranged on the connecting beams at the two sides and used for fixing the adjusted lengths of the connecting beams; and/or the number of the groups of groups,

In the left-right direction of the whole vehicle, one side, facing the outside of the vehicle, of the connecting beam is connected with a side pedal mounting plate, the side pedal mounting plate extends along the front-back direction of the whole vehicle, and the top of the side pedal mounting plate is provided with a side pedal mounting surface.

Compared with the prior art, the utility model has the following advantages:

according to the chassis structure of the vehicle body, the front auxiliary frame and the rear auxiliary frame which are positioned at the front part and the rear part of the vehicle can have the characteristics of a bearing type vehicle body structure, the advantage of smaller weight of the bearing type vehicle body can be utilized, the light weight of the vehicle body is facilitated, and the cruising ability of the whole vehicle can be improved.

Meanwhile, the front auxiliary frame longitudinal beam or the rear auxiliary frame longitudinal beam is provided with two longitudinal beams extending along the front-rear direction of the whole vehicle, and the front auxiliary frame longitudinal beam and the rear auxiliary frame longitudinal beam can form a double force transmission channel, so that the collision force transmission capacity of the front auxiliary frame and the rear auxiliary frame can be increased, and the collision safety of the whole vehicle can be improved.

Another object of the present utility model is to propose a vehicle in which the vehicle body chassis structure as described above is provided.

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

Drawings

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

FIG. 1 is a schematic view of a chassis structure of a vehicle body according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a front subframe according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a front subframe portion structure according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a crush section according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a rear subframe according to an embodiment of the present utility model;

FIG. 6 is a top view of the structure shown in FIG. 5;

FIG. 7 is a schematic view of a front cross member according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a length adjustment structure for a connecting beam according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a structure of a side mounting plate and a connecting beam according to an embodiment of the present utility model when extruded aluminum is used;

FIG. 10 is a schematic structural view of a side-pedal mounting plate and a connecting beam according to an embodiment of the present utility model when a steel rolling structure is adopted;

FIG. 11 is a schematic view of a chassis structure of a vehicle body provided with a battery pack according to an embodiment of the present utility model;

Reference numerals illustrate:

1. A front subframe; 2. a rear subframe; 3. a connecting beam; 4. a side pedal mounting plate; 5. a battery pack;

101. Front subframe rail; 102. a front subframe front cross member; 103. a front subframe center cross member; 104. a rear cross member; 105. front subframe anti-collision beams; 106. front auxiliary frame energy-absorbing box; 107. a front shock absorber; 108. a support beam; 201. a rear subframe rail; 202. a rear subframe front cross member; 203. a rear subframe rear cross member; 204. a front cross member; 205. a rear subframe impact beam; 206. a rear subframe energy absorption box; 207. a rear shock absorber; 2a, a front mounting point of the rear auxiliary frame; 2b, rear mounting points of the rear auxiliary frame; 3a, a connecting section; 3b, transverse reinforcing ribs; 3c, segmenting the longitudinal beam; 3d, fixing the structure; 4a, a side pedal mounting surface; 4b, collapsing the guide rib; 4c, vertical reinforcing ribs;

101a, a crush section; 101b, front of crush section; 101c, the rear of the crush section; 1011. an upper longitudinal beam; 1012. a side sill; 104a, a beam body; 104b, overhanging sections; 2011. an inner longitudinal beam; 2012. an outer side member; 2041. a straight section; 2042. bending sections;

A. the length of the connecting beam is adjusted; q, battery package installation space.

Detailed Description

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

In the description of the present utility model, 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 utility model 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 utility model. 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 utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

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

Example 1

The embodiment relates to a vehicle body chassis structure which is applied to a new energy vehicle type with a battery pack, and is preferably a pure electric vehicle type, and the vehicle body chassis structure is beneficial to improving the collision safety of the whole vehicle.

In the related art, the conventional vehicle body structure mainly includes a load-bearing vehicle body and a non-load-bearing vehicle body, which are different 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, wherein 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 paved roads. 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 comfort when the road surface is paved for running. 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.

Based on the above description, in order to fully utilize the advantages of the load-bearing vehicle body and improve the disadvantages of the load-bearing vehicle body, and in particular, in the case of the all-electric vehicle type, the present embodiment thus creatively proposes the vehicle body chassis structure developed based on the load-bearing vehicle body, and at this time, in the overall structure, the vehicle body chassis structure of the present embodiment includes the front subframe 1 located at the front of the vehicle, the rear subframe 2 located at the rear of the vehicle, and the connection beam 3 connected between the front subframe 1 and the rear subframe 2, as shown in conjunction with fig. 1.

The front subframe 1 is disposed under a front cabin of a front part of the vehicle, the front subframe 1 is provided with front subframe stringers 101 which are respectively disposed on two sides, the rear subframe 2 is disposed under a rear floor of a rear part of the vehicle, and the rear subframe 2 is provided with rear subframe stringers which are respectively disposed on left and right sides. Meanwhile, at least one of the front sub frame rail 101 and the rear sub frame rail 201 described above has two rails extending in the front-rear direction of the entire vehicle.

At this time, as set up above, through adopting the bearing type car body structure that has preceding, back sub vehicle frame, this embodiment alright utilize the less characteristics of bearing type car body weight, realize the lightweight of automobile body to can improve whole car duration. In addition, the front auxiliary frame longitudinal beam 101 and the rear auxiliary frame longitudinal beam 201 are provided with two longitudinal beams extending along the front-rear direction of the whole car, so that the front auxiliary frame longitudinal beam 101 and the rear auxiliary frame longitudinal beam 201 form a double force transmission channel, the collision force transmission capacity of the front auxiliary frame and the rear auxiliary frame can be increased, and the effect of improving the collision safety of the whole car can be achieved.

Based on the above overall description, it is to be noted that, as a preferred embodiment, as shown in fig. 2 to 7, in the present embodiment, each front sub-frame rail 101 and each rear sub-frame rail 201 are made to have two rails, and two of the front sub-frame rails 101 include an upper rail 1011 and a lower rail 1012 arranged up and down, and two of the rear sub-frame rails 201 include an inner rail 2011, and an outer rail 2012 disposed on a side of the inner rail 2011 facing the outside of the vehicle in the vehicle left-right direction.

In addition, in the present embodiment, the connecting beams 3 are divided into two on the left and right sides, and the front sub-frame 1, the rear sub-frame 2, and the connecting beams 3 on both sides also collectively define a battery pack mounting space Q for mounting the battery pack 5.

It should be noted that, instead of having two front sub-frame rails 101 and two rear sub-frame rails 201, it is also possible to have only two front sub-frame rails 101 or only two rear sub-frame rails 201, depending on the design requirements, of course. When only the front sub frame rail 101 or only the rear sub frame rail 201 has two rails, the specific arrangement thereof can also be seen from the description relating to the present embodiment.

In addition, the number of the connecting beams 3 is two, and the front sub-frame 1, the rear sub-frame 2, and the connecting beams 3 on both sides define a battery pack installation space Q. Of course, it is also possible to embody the connecting beams 3 in one piece only or in other numbers. When the connecting beam 3 is one, it may be arranged, for example, at the center in the vehicle width direction (the left-right direction of the entire vehicle), and when the connecting beam 3 is other in number, it may be arranged at intervals in the vehicle width direction, and the battery pack 5 may be connected with the connecting beam 3 as well regardless of the number of the connecting beams 3 provided, so as to increase the safety of the battery pack 5 via the provision of the connecting beam 3.

In the present embodiment, the front sub frame rail 101 and the rear sub frame rail 201 each have two rails, and the connecting beam 3 is provided as two separate members on the left and right sides, for example. It can be understood that the front subframe and the rear subframe are connected into a whole through the arrangement of the connecting beams 3 on two sides, and the battery pack installation space Q is jointly defined by the front subframe 1, the rear subframe 2 and the connecting beams 3 on two sides, and by means of the connection arrangement of the connecting beams 3, the battery pack annular frame structure can be formed, so that the battery pack 5 can move along with the annular frame structure when the vehicle collides, and the collision impact suffered by the battery pack 5 can be reduced, so that the effect of increasing the collision safety of the battery pack 5 is achieved.

As shown in further detail in fig. 2 to 4, with respect to the front subframe 1, in the present embodiment, the front ends of the side upper side members 1011 and the side lower side members 1012 are connected to the front side member 102 of the front subframe, and the rear ends of the side upper side members 1011 and the side lower side members 1012 are connected to the rear side member 104 located at the rear of the front subframe 1.

Further, similar to the front subframe 1 provided in the vehicle in the related art, the present embodiment is provided with a front subframe center cross member 103 between the front subframe side members 101 on both sides in addition to the front subframe front cross member 102. The front sub frame center rail 103 is located between the center portions of the side front sub frame rails 101 and is specifically connected between the side sill 1012 on both sides.

In addition to the front sub-frame center cross member 103 described above, the present embodiment is also provided with a front sub-frame impact beam 105 at the front end of the front sub-frame 1, and the front sub-frame impact beam 105 is also connected to the front side of the front sub-frame center cross member 102 specifically through front sub-frame energy absorbing boxes 106 provided separately on the left and right sides.

In this embodiment, the rear cross member 104 may be, for example, a part of the front subframe 1, and specifically, a front subframe rear cross member located at the rear end of the front subframe 1. However, instead of being a front sub-frame rear cross member, the rear cross member 104 of the present embodiment may be a beam structure provided at the rear of the front sub-frame 1 independently of the front sub-frame 1, and the rear cross member 104 may be connected between the connecting beams 3 at both sides at this time, for example, to meet the installation requirements.

It should be noted that, in the implementation, when the rear cross member 104 is disposed independently of the front subframe 1, the connection between the rear cross member and the front subframe 1 is also typically connected to the rear ends of the front side members 101. Further, when the rear cross member 104 is provided independently of the front subframe 1, it may be provided selectively as needed for the front subframe rear cross member in the front subframe 1.

In the present embodiment, the rear cross member 104 is exemplified as a front sub-frame rear cross member of the front sub-frame 1, and specifically, as a preferred embodiment, the rear cross member 104 also has a cross member main body 104a located in the middle, and overhanging sections 104b connected to both left and right ends of the cross member main body 104 a. Each side extension 104b extends to the outside of the vehicle in the left-right direction of the vehicle, and the rear end of each side sill 1012 is connected to the cross member main body 104a, and the rear end of each side sill 1011 is connected to the extension 104b on the same side.

Thus, the rear cross member 104 is made up of the cross member main body 104a and the left and right outer extensions 104b, and the rear ends of the side sills 1012 are connected to the cross member main body 104a, and the rear ends of the upper stringers 1011 are connected to the outer extensions 104b, so that the connection between the upper and lower stringers and the rear cross member 104 can be facilitated, and the transmission of the collision force at the upper and lower stringers to the rear cross member 104 can be facilitated.

With continued reference to fig. 3, as a preferred embodiment, the present embodiment also allows the front ends of the side upper and lower stringers 1011, 1012 to meet together, and the front sections of the side upper and lower stringers 1011, 1012, and the front subframe energy absorbing box 106 located on the front side of the front subframe front rail 102 together form a herringbone structure, based on the front ends of the side upper and lower stringers being connected to the front subframe front rail 102.

At this time, the front ends of the upper and lower side members on each side are connected to the front cross member 102 of the front subframe, and the front sections of the upper and lower side members on each side and the front subframe energy-absorbing box 106 form a herringbone structure, which is beneficial to the force transmission of the collision force to the upper and lower side members, so that the transmission capacity of the front subframe side member 101 to the collision force can be further increased.

In this embodiment, as a preferred embodiment, the front sections of the upper side member 1011 and the lower side member 1012 on each side have a crush section 101a, and the crush section 101a is capable of bending and deforming when the front sub frame member 101 receives a frontal impact force not lower than a preset threshold, so that the front sections of the upper side member 1011 and the lower side member 1012 can be guided to crush.

It can be understood that by providing the crush zone 101a on the upper and lower side members, respectively, the crush energy absorption of the crush zone 101a can be utilized to increase the absorption effect on the collision impact force, thereby achieving the effects of increasing the collision force transmission capability of the front subframe 1 and improving the collision energy absorption capability of the front subframe 1.

As a possible implementation, with continued reference to fig. 4, the crush zone 101a in the front section of the side upper side rail 1011 and the front section of the side lower side rail 1012 may each include, for example, a crush zone front portion 101b and a crush zone rear portion 101c connected in the front-rear direction of the whole vehicle, and also such that the yield strength of the crush zone front portion 101b is greater than the yield strength of the crush zone rear portion 101 c.

In this way, by making the crush zone 101a on each side include the front and rear portions that are connected, and making the yield strength of the crush zone front portion 101b greater than that of the crush zone rear portion 101c, crush deformation can occur at the crush zone rear portion 101c position in the upper and lower side members at the time of a vehicle frontal collision, and the crush zone front portion 101b in the upper and lower side members moves into the space between the upper and lower side members due to the crush of the crush zone rear portion 101c, and eventually the crush zone 101a in the upper and lower side members can be bent, so that the crush energy absorbing effect of the crush zone 101a on the upper and lower side members at the time of a collision can be ensured.

In order to make the yield strength of the front portion 101b of the crush zone greater than that of the rear portion 101c of the crush zone, in practical implementation, for example, the materials, thicknesses, etc. of the front portion 101b of the crush zone and the rear portion 101c of the crush zone may be designed so that there are differences in the materials, thicknesses, etc. of the two, or a structure reinforcing structure may be added to the front portion 101b of the crush zone, or a crush structure may be added to the rear portion 101c of the crush zone, so as to meet the design requirements of the yield strength of the front and rear portions of the crush zone.

While still referring to fig. 4, based on the fact that the yield strength of crush section front portion 101b is greater than the yield strength of crush section back portion 101c, as a practical implementation, this embodiment may, for example, make crush section front portion 101b and crush section back portion 101c both tubular and also plug the front end of crush section back portion 101c into the back end of crush section front portion 101 b. Therefore, the front part 101b of the crumple section and the rear part 101c of the crumple section are designed into a tube shape, and the rear part 101c of the crumple section is spliced in the front part 101b of the crumple section, so that the structure of the crumple section 101a is simpler, the molding preparation of the crumple section 101a is convenient to realize, and the crumple energy absorption effect of the crumple section 101a can be ensured.

Of course, in addition to the above design of the front and rear portions of the crush section into a tubular structure that is connected by plugging, other arrangement manners may be adopted in this embodiment to achieve connection between the front portion 101b of the crush section and the rear portion 101c of the crush section, and to enable the crush section 101a to bend and deform when the vehicle collides. For example, a first mounting portion may be disposed at the rear end of the front portion 101b of the crush section, and a second mounting portion may be disposed correspondingly at the front end of the rear portion 101c of the crush section, where the first and second mounting portions are butted together, and the first and second mounting portions may generally be plate bodies that can be butted together, and may be fixedly connected by welding or screwing.

In this embodiment, as a preferred embodiment, the middle parts of the upper stringers 1011 on both sides are arched upward in the up-down direction of the entire vehicle, and front shock towers 107 may be provided on the upper stringers 1011 on each side, and front shock absorber mounting structures are provided on the front shock towers 107 on each side, respectively, for mounting the front shock absorbers.

At this time, it can be understood that by making the middle portion of the upper longitudinal beam 1011 arch upward and disposing the front shock absorber 107 at the arch position, it is not only helpful to promote the crumple energy absorbing effect of the upper longitudinal beam 1011 when the vehicle collides, in particular, when the vehicle collides, but also to meet the height requirement of the front shock absorber 107 in the whole vehicle.

In the embodiment, as a preferred implementation manner, as shown in fig. 3, the upper longitudinal beam 1011 and the front shock-absorbing tower 107 may be connected in a straight structure along the front-rear direction of the whole vehicle. In this way, the upper longitudinal beam 1011 and the front shock absorber 107 are connected in a straight structure, which can facilitate the integrated arrangement of the front shock absorber 107 and also facilitate the improvement of the collision force transmission capability of the upper longitudinal beam 101.

In this embodiment, as shown in fig. 2 and 3, as a preferred embodiment, a supporting beam 108 may be disposed between each side lower beam 1012 and the upper beam 1011, and the bottom end of each side supporting beam 108 is connected to the lower beam 1012, and the connection point between each side supporting beam 108 and the upper beam 1011 is located specifically below the same side front shock absorber 107.

At this time, by providing the support beam 108 located below the front shock absorber 107 between the upper and lower side members on each side, the upper side member 1011 and the front shock absorber 107 can be supported to raise the dynamic stiffness of the front sub frame member 101 as a whole and the position of the front shock absorber 107. In particular, the top of the support beam 108 and the upper side member 1011 may be connected by a screw structure, and the connection portion between the support beam 108 and the lower side member 1012 may be arranged corresponding to the cross member 103 in the front subframe, so as to increase the supporting capability of the support beam 108.

In the present embodiment, as further shown in fig. 5 to 7, as for the rear subframe 2, similarly to the rear subframe 2 provided in the vehicle in the prior art, the rear subframe 2 of the present embodiment also has a rear subframe cross member connected between the inner side rails 2011 on both sides, and the rear subframe cross member includes a rear subframe front cross member 202 provided near the front end of the inner side rail 2011, and a rear subframe rear cross member 203 provided near the rear end of the inner side rail 2011.

Meanwhile, as a preferred embodiment, in the present embodiment, the outer stringers 2012 on both sides extend in the front-rear direction of the entire vehicle, and each side outer stringer 2012 is connected between the front and rear ends of the inner stringers 2011 on the same side. Like this for outer longeron 2012 connects between the front and back end of inner longeron 2011, can make outer longeron 2012 participate in collision transfer better, can further promote the collision transfer effect of rear subframe 2.

As one of the differences from the conventional rear subframe structure, in this embodiment, as a preferred embodiment, a front cross member 204 is also provided between the front ends of the side inner side members 2011, and based on the provision of the front cross member 204, the rear subframe cross member, and the side inner side members 2011 and the side outer side members 2012 are connected to form a plurality of annular structures.

At this time, it can be understood that, through the arrangement of the front cross member 204, the structural strength and rigidity of the front portion of the rear subframe 2 can be increased, and meanwhile, the front cross member 204, the rear subframe cross member, and the inner side beams 2011 and the outer side beams 2012 on each side are connected to form a plurality of annular structures, which can utilize the characteristic of high annular structural strength to ensure the structural strength and rigidity of the whole rear subframe 2, thereby being beneficial to the improvement of the torsional rigidity of the rear portion of the whole vehicle.

In this embodiment, as further shown in fig. 6, the front ends of the side inner side members 2011 are each provided with a rear sub-frame front mounting point 2a for connection with the vehicle body, and the front cross member is provided between the side rear sub-frame front mounting points 2a while the front ends of the outer side members 2012 of the respective sides also meet at the same side rear sub-frame front mounting point 2 a.

In this case, the rear subframe front mounting point 2a on each side may be a connection hole provided at the front end of the inner side member 2011, and a boss may be fitted into the connection hole to connect the rear subframe 2 and the vehicle body. Further, it can be appreciated that by having the front cross member 204 disposed between the two side rear sub-frame front mounting points 2a and also having the front ends of the respective side outer side rails 2012 meet at the same side rear sub-frame front mounting point 2a position, it is possible to contribute to an increase in rigidity of the rear sub-frame 2 front mounting position, and thus to an increase in dynamic rigidity of the assembled rear sub-frame 2.

In particular, in this embodiment, for example, the cross section of the front beam 204 in the front-rear direction of the whole vehicle may be configured as a closed cavity structure, so that by making the cross section of the front beam 204 a closed cavity, the structural strength of the front beam 204 itself can be ensured.

In addition, as shown in fig. 5 in combination with fig. 7, the present embodiment may further provide that the front cross member 204 is arranged in a downward arch in the up-down direction of the entire vehicle, and that the front cross member 204 has a flat section 2041 in the middle and bending sections 2042 on both the left and right sides in terms of structure. Both side bending sections 2042 are disposed obliquely upward, and the front cross member 204 is connected to the inner side member 2011 through the bending sections 2042.

It will be appreciated that by providing the front cross member 204 with a lower arch and having straight sections 2041 and bent sections 2042, it is possible on the one hand to increase the structural strength of the front cross member 204 itself by taking advantage of the strong arch structure, and on the other hand, by providing the straight sections 2041, it is also possible to adapt the front cross member 204 as a mounting base for components such as a battery pack, thereby facilitating the arrangement of vehicle components in the vehicle body.

In this embodiment, as another difference from the existing rear subframe structure, a rear subframe collision preventing beam 205 is provided at the rear end of the rear subframe 2, and rear subframe energy absorbing boxes 206 are also connected to the rear ends of the inner side stringers 2011 on both sides, and the rear subframe collision preventing beam 205 is connected to the rear subframe energy absorbing boxes 206 on both sides, so as to implement the arrangement at the rear end of the rear subframe 2.

At this time, the rear subframe collision beam 205 and each rear subframe crash box 206 may be of a conventional collision beam and crash box structure as used in conventional vehicle bodies. Moreover, by arranging the rear subframe collision avoidance beam 205 at the rear end of the rear subframe 2, it can be understood that, on one hand, the rear subframe collision avoidance beam 205 can promote the rear subframe 2 and collide with the force transmission performance, so that the collision force can be better transmitted forward along the inner longitudinal beam 2011 and the outer longitudinal beam 2012, the unit location stress is avoided, the collision force is difficult to disperse, and the deformation is overlarge, and on the other hand, the rear subframe collision avoidance beam 205 can also be used as a pedestrian anti-entanglement beam at the rear part of the vehicle, and the safety in the reversing process can be promoted.

By connecting the rear subframe collision-preventing beam 205 with the inner side member 2011 through the rear subframe energy-absorbing box 206, the embodiment can collapse and absorb energy through the rear subframe energy-absorbing box 206, which is helpful for further improving the safety during the vehicle collision.

Still referring to fig. 6, based on the arrangement of each side outer rail 2012 and rear subframe energy absorber 206, it is preferable that the present embodiment also have each side inner rail 2011 and rear section of outer rail 2012, and the same side rear subframe energy absorber 206, together form a chevron-shaped structure. In this way, the rear sections of the inner side member 2011 and the outer side member 2012 and the rear subframe energy-absorbing box 206 together form a herringbone structure, which is beneficial to the transmission of the collision force to the inner side member 2011 and the outer side member 2012, and the transmission capability of the collision force can be further increased.

In this embodiment, in addition to the rear sub-frame front mounting point 2a described above, rear sub-frame rear mounting points 2b for connection with the vehicle body are also provided at the rear ends of the side inner side members 2011, and at this time, the rear sub-frame rear mounting points 2b on each side may also employ connection holes, and bushings fitted therein. In addition, the present embodiment preferably also allows each side outer rail 2012 and rear subframe energy absorber box 206 to meet at the same side rear subframe rear mounting point 2 b.

In this way, by intersecting each side outer rail 2012 and the rear subframe crash boxes 206 at the rear subframe rear mounting point 2b position, it is also possible to contribute to an increase in rigidity of the rear mounting position of the rear subframe 2, to further enhance the dynamic rigidity of the assembled rear subframe 2.

In this embodiment, as also shown in fig. 5, as a preferred embodiment, the middle portions of the side outside stringers 2012 are each arched upward in the vehicle up-down direction, and the tops of the arched portions of the side outside stringers 2012 may be each provided as a straight section arranged in the vehicle front-rear direction.

At this time, the center portions of the side outer stringers 2012 are made to arch upward, which contributes to an increase in the crumple energy absorbing performance of the outer stringers 2012 at the time of collision. The top of the arched portion of the outer longitudinal beam 2012 is a flat section, and at this time, the top of each side outer longitudinal beam 2012 may be provided with a rear shock absorber 207 for mounting a rear shock absorber, and at the same time, a rear shock absorber spring mounting seat may be connected to the bottom of each side flat section for mounting a rear shock absorber spring.

Referring still to fig. 6, in this embodiment, the rear subframe boxes 206 and the same side outer side members 2012 are disposed in a straight line as viewed from the top and bottom of the vehicle. In this way, by arranging the rear subframe energy-absorbing box 206 and the outer longitudinal beam 2012 in a straight line, the penetrability of the force transfer channel formed by the rear subframe energy-absorbing box 206 and the outer longitudinal beam 2012 can be increased, so that the collision force transfer can be smoother, and the transmission and dispersion of the collision force along the outer longitudinal beam 2012 can be facilitated.

In this embodiment, as shown in fig. 1, the connection of the front and rear sub frames by the two side connecting beams 3 is also performed in the left-right direction of the entire vehicle, and as a preferable embodiment, each side connecting beam 3 is also positioned on the side of the front sub frame side member 101 and the inner side member 2011 that are positioned outside the vehicle.

At this time, as shown in fig. 1, the connecting beams 3 on each side are located on the side of the front sub-frame rail 101 and the inner rail 2011 on the same side, which are close to the outside of the vehicle, so that the present embodiment helps to realize the Y-directional cross-section change of the front and rear parts of the load-bearing vehicle body, and can meet the matching design requirements between the chassis and the vehicle body skeleton in the load-bearing vehicle body.

In the embodiment, the rear cross member 104 is provided at the rear portion of the front subframe 1, and the front ends of the side connecting beams 3 are respectively connected to the ends of the left and right outer extensions 104b of the rear cross member 104, and the rear ends of the side connecting beams 3 are respectively connected to the front ends of the side inner stringers 2011. Thus, the rear cross member 104, the front cross member 204, and the connection beams 3 on both sides together define a battery pack mounting space Q for mounting the battery pack 5. And the battery pack installation space Q is formed between the front cross member 204, the rear cross member 104 and the both side connecting beams 3, which is advantageous in that the formed ring-shaped frame structure becomes a rigid encircling structure adapted to the shape of the battery pack, so that the collision safety of the battery pack 5 can be better improved.

It is noted that by providing the overhanging section 104b in the rear cross member 104, it is not only possible to facilitate the connection with the two-sided connecting beam 3. At the same time, still referring to fig. 1, it also contributes to achieving a change in the Y-direction (left-right direction of the whole vehicle) cross section of the front portion of the load-bearing vehicle body, i.e., each side connecting beam 3 is not in line with the front subframe rail 101, but bends at the joint position therebetween, and thereby makes the vehicle body Y-direction cross section smaller in size at the front subframe 1.

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 this embodiment, as a preferred embodiment, as shown in fig. 1 and 5, the rear end of each side connecting beam 3 is provided with a connecting section 3a arranged obliquely, each side connecting section 3a is connected with the front end of the same side inner side member 2011 through the connecting section 3a, and the distance between the two side connecting sections 3a is also set to be smaller from front to rear in the front-rear direction of the whole vehicle.

At this time, by providing the inclined connecting section 3a at the rear end of each side connecting beam 3, it is also possible to facilitate the connection between the connecting beam 3 and the inner side member 2011, and the distance between the connecting sections 3a at both sides is set gradually smaller from front to back, so that it is also possible to facilitate the Y-directional cross-sectional change of the rear portion of the load-bearing vehicle body similar to the design of the above-described overhanging section 104b, so as to not only satisfy the matching design requirement between the chassis and the vehicle body skeleton in the load-bearing vehicle body, but also become one of the main differences from the non-load-bearing vehicle body.

In the present embodiment, still referring to fig. 6, based on the connection between each side connecting beam 3 and the front end of the inner side member 2011, the connecting beams 3 on each side may be connected to the inner side member 2011 and the outer side member 2012 to form a herringbone structure. By the formed chevron-shaped structure, the transmission of the collision force at the rear subframe 1 to the connecting beam 3 is facilitated to be dispersed forward via the connecting beam 3.

It should be noted that, in the embodiment, the connecting beams 3 located at two sides of the present embodiment may be, for example, integrally formed beam structures, and specifically, integrally closed structures. In this case, the connecting beam 3 may be connected to the rear cross member 104 and the inner side member 2011 of the front and rear sub frames by welding. At this time, it can be understood that by using the closed section, it can guarantee the structural strength of the connecting beam 3 itself by means of the characteristic of great structural strength of the cavity.

Of course, the connecting beam 3 of the present embodiment may have other structures besides an integral structure, and may have, for example, a steel profile welded structure, an aluminum alloy profile extruded structure, or the like.

In this embodiment, based on the arrangement of the two side connecting beams 3, instead of making the two side connecting beams 3 an integral structure, as a preferred implementation manner, it is also possible to arrange the two side connecting beams 3 with adjustable lengths along the front-rear direction of the whole vehicle, and simultaneously to respectively arrange fixing structures 3d on the two side connecting beams 3, so as to fix the adjusted lengths of the connecting beams 3 by the fixing structures 3 d.

At this time, through making the length of both sides tie-beam 3 adjustable to set up the fixed knot who is used for fixed tie-beam 3 length constructs, it alright do benefit to and satisfy the wheelbase change between the different motorcycle types, and make preceding, back sub vehicle frame become the sharing piece, and then help realizing the platformization design, in order to reduce whole car research and development cost.

In particular, the length adjustment position of the two side connecting beams 3 may be indicated by reference a in fig. 1, and, as shown in fig. 8, to achieve the length adjustment of the connecting beams 3, for example, two longitudinal beam sections 3c disconnected at the reference a may be plugged, and at the same time, the fixing structure 3d may be in a form of a threaded sleeve and a bolt.

The threaded sleeve can be fixed in one of the longitudinal beam sections 3c, connecting through holes are respectively formed in the two longitudinal beam sections 3c, and the connecting through holes in the longitudinal beam sections 3c positioned on the outer side are arranged at intervals. After the length of the connecting beam 3 is adjusted, the length of the connecting beam 3 can be adjusted and the adjusted connecting beam 3 can be fixed by screwing the bolts into the threaded sleeves through the connecting process after the plugging lengths of the two longitudinal beam sections 3c are adjusted.

In addition, when the length of the both-side connecting beam 3 is adjustable, the side step mounting plates 4 provided on the side of each side connecting beam 3 facing the outside of the vehicle, which will be described later, should be detachably connected to the connecting beam 3. In addition, in the concrete implementation, the side pedal mounting plate 4 with a proper length can be manufactured according to the adjusted length of the connecting beam 3, and the side pedal mounting plate is connected to the outer side of the connecting beam 3 after the length of the connecting beam 3 is fixed.

With continued reference to fig. 1, as a preferred embodiment, the side pedal mounting plates 4 may be further provided on the side of each side connecting beam 3 facing the outside of the vehicle in the left-right direction of the entire vehicle. The side pedal mounting plates 4 on each side extend in the front-rear direction of the entire vehicle, and a side pedal mounting surface 4a is provided on top of each side pedal mounting plate 4.

At this time, by attaching a side step panel, a side step garnish, and the like to the side step attachment surface 4a, a side step assisting the driver in getting on and off the vehicle can be formed. By connecting the side pedal mounting plate 4 to the outer side of the connecting beam 3, it can be understood that the side pedal mounting plate can be used as a side pedal assembly foundation and can be used as a side collision energy absorption structure to play a role in collision energy absorption, so that one piece of two-purpose structure can be realized, the side pedal mounting framework is saved, and the lightweight design of a vehicle body is also facilitated.

In the specific implementation, the side pedal mounting plates 4 on each side may be detachably connected to the same-side connecting beam 3 through a connector, for example. In this way, each side pedal mounting plate 4 is detachably connected to the connecting beam 3 on the same side through the connecting piece, so that the assembly of the side pedal mounting plate 4 can be facilitated, and the later maintenance and replacement of the side pedal mounting plate 4 can be facilitated.

Of course, in addition to the above detachable arrangement, in the embodiment, each side pedal mounting plate 4 may be integrally formed with the same-side connecting beam 3. So for the mounting panel 4 is stepped on to the side and the tie-beam 3 integrated into one piece, and it can reduce the manufacturing cost of tie-beam 3 and the mounting panel is stepped on to the side 4, and also can guarantee the structural strength of tie-beam 3 and the mounting panel is stepped on to the side better to be favorable to promoting the overall rigidity of automobile body chassis structure.

For the side pedal mounting plate 4, specifically, for example, a steel section or an aluminum alloy section may be used, and the connecting member may be a screw structure to fix the side pedal mounting plate 4 to the connecting beam 3. For the above-mentioned integrated molding of the side pedal mounting plate 4 and the connecting beam 3, for example, the side pedal mounting plate 4 and the connecting beam 3 may be made of one of steel section bars and aluminum alloy section bars, or the side pedal mounting plate 4 and the connecting beam 3 may be made of steel rolling structures.

As shown in fig. 9, it is an exemplary structure when the side pedal mounting plate 4 and the connecting beam 3 are both made of aluminum alloy, and in this structural form, in order to increase the structural strength of the connecting beam 3 and the side pedal mounting plate 4, a transverse reinforcing rib 3b and a vertical reinforcing rib 4c may be provided in both. Meanwhile, in order to improve the collision energy absorption effect of the side pedal mounting plate 4 when the vehicle collides with the side, a crumple guide rib 4b extending in a bending shape can be arranged at the bottom of the side pedal mounting plate 4.

At this time, the reinforcing ribs at the side pedal mounting plate 4 adopt the vertical reinforcing ribs 4c and the crumple guide ribs 4b, which can also enable the side pedal mounting plate 4 to have better crumple energy absorbing capability under the condition of properly increasing the structural strength of the position of the side pedal mounting plate 4, so that one side of the side pedal mounting plate 4 can be made into a crumple energy absorbing area, and the side impact energy absorbing effect can be improved. Unlike the side mounting plate 4, the side of the connecting beam 3 is provided with the transverse reinforcing ribs 3b, and the connecting beam 3 has stronger supporting rigidity when the vehicle is in side collision by utilizing the transverse supporting function of the transverse reinforcing ribs 3b, so that one side of the connecting beam 3 becomes a rigid frame area to better protect the battery pack 5 positioned in the battery pack mounting space Q.

In this embodiment, besides the structure of the integrally formed connecting beam 3 and the side pedal mounting plate 4 with different cross sections as shown in fig. 9, the wall thickness of the connecting beam 3 side can be made larger than that of the side pedal mounting plate 4 side in practical implementation, so that the strength of the connecting beam 3 side can be further increased to fully utilize the crumple energy absorption 4 of the side pedal mounting plate 4 side and protect the battery pack inside the connecting beam 3.

As shown in fig. 10, an exemplary cross-sectional form of the side step mounting plate 4 and the connecting beam 3 is shown when a steel roll structure is adopted, and it should be noted that when the roll structure is adopted, the side step mounting plate 4 and the connecting beam 3 which are integrally formed generally adopt a "ri" cross-section as shown in fig. 10, and can be connected by a combination of laser welding and spot welding. However, instead of using a "sun" shaped cross section, it is of course possible to use other cross-sectional forms for the roll-formed side pedal mounting plate 4 and the connecting beam 3.

In the vehicle body chassis structure of the present embodiment, with the above structure, by providing the front sub-frame rail 101 and the rear sub-frame rail 201 with two rails extending in the front-rear direction of the vehicle, the front sub-frame rail 101 and the rear sub-frame rail 201 can form a double force transmission path, thereby increasing the collision force transmitting capability of the front and rear sub-frames, and improving the collision safety of the vehicle.

In addition, on the basis of arranging the two-side connecting beams 3, particularly by connecting the two-side connecting beams 3 between the front sub-frame and the rear sub-frame, the front sub-frame and the rear sub-frame can be connected together through the connecting beams 3 on the two sides on the basis of the traditional bearing type vehicle body, so that the bearing type vehicle body structure with the front sub-frame and the rear sub-frame can be adopted, the characteristic of smaller weight of the bearing type vehicle body is utilized, the weight of the vehicle body is reduced, and the cruising ability of the whole vehicle can be improved.

Through the setting of both sides tie-beam 3 to link up preceding, back sub-frame, and by rear cross beam 104, front portion crossbeam 108 and both sides tie-beam 3 jointly inject battery package installation space Q, the body chassis structure of this embodiment also can constitute battery package annular frame structure with the help of the connection setting of tie-beam 3. Can make battery package 5 can move along with the annular frame structure at the time of the collision, can reduce the collision impact that battery package 5 received, the collision security of multiplicable battery package 5 to can promote whole car security quality.

In addition, it should be noted that, in the vehicle chassis structure of 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 in the curved longitudinal beam structure, the vehicle chassis structure of this embodiment is a structural innovation of the sub-frame form, 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 3 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 3 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 3, 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 duration of the whole vehicle, but also can form the annular protection frame of the battery pack so as to better improve the collision safety of the battery pack 5. 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.

Example two

The present embodiment relates to a vehicle, which is specifically a new energy vehicle type provided with a battery pack, and specifically, which is preferably a pure electric vehicle type, while the vehicle body chassis structure in embodiment one is provided therein, and in combination with that shown in fig. 11, a battery pack 5 may be provided in a battery pack installation space Q.

It should be noted that, on the basis of the chassis structure of the vehicle body in the first embodiment, when the vehicle in the first 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 framework, the front auxiliary frame, the rear auxiliary frame and the connecting beam 3 in the chassis participate 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 type vehicle body.

The vehicle of the present embodiment is provided with the vehicle body chassis structure of the first embodiment, which can increase the collision force transmitting capability of the front and rear sub frames on the one hand. On the other hand, the connection beams 3 are arranged on the two sides, and the connection beams 3 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 connection beams 3 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 5 can be reduced, the collision safety of the battery pack 5 is improved, the safety quality of the whole automobile can be improved, and good practicability is realized.

The foregoing description of the preferred embodiments of the utility model 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 utility model.

Claims (10)

1. A vehicle chassis structure, characterized in that:

Comprises a front auxiliary frame (1), a rear auxiliary frame (2) and a connecting beam (3) connected between the front auxiliary frame (1) and the rear auxiliary frame (2);

The front subframe (1) has front subframe side members (101) that are provided on both sides, the rear subframe (2) has rear subframe side members (201) that are provided on both sides, and at least one of the front subframe side members (101) and the rear subframe side members (201) has two side members that extend in the front-rear direction of the vehicle.

2. The vehicle chassis structure according to claim 1, wherein:

two of the front subframe stringers (101) on each side include an upper stringer (1011) and a lower stringer (1012) arranged up and down;

The front ends of the upper longitudinal beam (1011) and the lower longitudinal beam (1012) on each side are connected with a front auxiliary frame front cross beam (102), and the rear ends of the upper longitudinal beam (1011) and the lower longitudinal beam (1012) on each side are connected with a rear cross beam (104) positioned at the rear part of the front auxiliary frame (1);

The connecting beam (3) is connected with the front auxiliary frame (1) through the rear cross beam (104).

3. The vehicle body chassis structure according to claim 2, characterized in that:

The front sections of the upper longitudinal beam (1011) and the lower longitudinal beam (1012) on each side are provided with a crumple section (101 a), and the crumple section (101 a) can bend and deform when the front auxiliary frame longitudinal beam (101) is subjected to a frontal collision force not lower than a preset threshold value and guide the front sections of the upper longitudinal beam (1011) and the lower longitudinal beam (1012) to crumple; and/or the number of the groups of groups,

A support beam (108) arranged in the up-down direction of the whole vehicle is connected between the side sill (1012) and the upper side sill (1011) on each side.

4. The vehicle chassis structure according to claim 1, wherein:

Each of the two side members of the rear sub frame side member (201) includes an inner side member (2011), and an outer side member (2012) provided on a side of the inner side member (2011) facing the outside of the vehicle in the right-left direction of the vehicle;

The outer stringers (2012) on both sides extend along the front-rear direction of the whole vehicle, and the outer stringers (2012) on each side are connected between the front end and the rear end of the inner stringers (2011) on the same side.

5. The vehicle chassis structure according to claim 4, wherein:

The rear end of the rear auxiliary frame (2) is provided with a rear auxiliary frame anti-collision beam (205), the rear ends of the inner longitudinal beams (2011) on two sides are connected with rear auxiliary frame energy-absorbing boxes (206), and the rear auxiliary frame anti-collision beam (205) is connected with the rear auxiliary frame energy-absorbing boxes (206) on two sides.

6. The vehicle chassis structure according to claim 5, wherein:

The middle parts of the outer longitudinal beams (2012) at the two sides are arched upwards along the up-down direction of the whole car, and the tops of the arched parts of the outer longitudinal beams (2012) at the two sides are straight sections arranged along the front-back direction of the whole car; and/or the number of the groups of groups,

The rear auxiliary frame energy absorption boxes (206) on each side and the outer longitudinal beams (2012) on the same side are arranged in a straight line when seen from the up-down direction of the whole vehicle.

7. The vehicle body chassis structure according to any one of claims 1 to 6, characterized in that:

The connecting beams (3) are respectively arranged at the left side and the right side, and the rear ends of the connecting beams (3) at each side are connected with the front ends of the rear auxiliary frame longitudinal beams (201) at the same side;

the front auxiliary frame (1), the rear auxiliary frame (2) and the connecting beams (3) on two sides are connected to form an annular structure, and a battery pack installation space (Q) is formed in the annular structure.

8. The vehicle chassis structure according to claim 7, wherein:

A front cross beam (204) is connected between the positions where the longitudinal beams of the rear auxiliary frame (2) and the connecting beams (3) on the two sides are connected; and/or the number of the groups of groups,

In the left-right direction of the whole vehicle, the connecting beams (3) on each side are positioned on the same side, and the front auxiliary frame longitudinal beam (101) and the rear auxiliary frame longitudinal beam (201) are positioned on one side close to the outside of the vehicle.

9. The vehicle chassis structure according to claim 7, wherein:

The lengths of the connecting beams (3) at two sides along the front and rear directions of the whole vehicle are adjustable, fixing structures (3 d) are respectively arranged on the connecting beams (3) at two sides, and the fixing structures (3 d) are used for fixing the adjusted lengths of the connecting beams (3); and/or the number of the groups of groups,

In the left-right direction of the whole vehicle, one side, facing the outside of the vehicle, of the connecting beam (3) is connected with a side pedal mounting plate (4), the side pedal mounting plate (4) extends along the front-back direction of the whole vehicle, and the top of the side pedal mounting plate (4) is provided with a side pedal mounting surface (4 a).

10. A vehicle, characterized in that:

the vehicle is provided with the vehicle body chassis structure according to any one of claims 1 to 9.