CN220549103U - Vehicle chassis structure and vehicle - Google Patents

Abstract

The utility model discloses a vehicle chassis structure and a vehicle. The front end connecting part of the battery is positioned at the front end of the battery and extends towards one side of the front auxiliary frame, wherein the front end connecting assembly comprises a lower front end connecting part of the vehicle body, a front end connecting part of the battery and a front auxiliary frame connecting part, and the front end connecting part of the battery, the front auxiliary frame connecting part of the battery and the front end connecting part of the lower vehicle body are sequentially overlapped along the height direction of the vehicle. The rear end connecting part is positioned at one side of the rear end of the battery, which extends towards the rear auxiliary frame, and the rear end connecting assembly comprises a lower body rear end connecting part, a battery rear end connecting part and a rear auxiliary frame connecting part which are fixedly connected; the lower vehicle body rear end connecting part and the rear auxiliary frame connecting part are overlapped and detachably and fixedly connected with the connecting member. The vehicle chassis structure improves the space utilization rate of the whole vehicle in the length direction; the battery system is protected, and collision energy can be efficiently transmitted.

Description

Vehicle chassis structure and vehicle

Technical Field

The utility model relates to the field of vehicle chassis, in particular to a vehicle chassis structure and a vehicle.

Background

Along with the continuous development of automobile electrodynamic, traditional vehicle enterprise and domestic new potential are all put the development focus in electric automobile direction, and to electric automobile, battery system, automobile body and collision safety are very important, and current electric automobile's battery system belongs to independent system, and in the car frontal collision process, automobile body and chassis system need protect battery safety through the structure that is tedious, for example set up power collision protection architecture, crashproof support etc. protect battery's safety, not only cause the waste of whole car length direction size like this, also caused the increase of whole car weight simultaneously.

For example, chinese patent with application number CN202320332728.9 discloses a frame power battery anti-collision device and vehicle, mainly protects the power battery by arranging frame cross beam, anti-collision bracket and other structures at the front end of the battery, and this kind of scheme increases more structures on the chassis of the vehicle, resulting in redundancy of the vehicle body and chassis system, waste of the length direction dimension of the whole vehicle and increase of the weight of the whole vehicle.

Disclosure of Invention

The utility model aims to solve the problems that in the prior art, an anti-collision protection structure is added for protecting a power battery, so that the redundancy of a vehicle body and a chassis system is caused, the waste of the length direction dimension of the whole vehicle is caused, and the weight of the whole vehicle is increased.

In order to solve the technical problems, the utility model discloses a vehicle chassis structure, which comprises: and the lower vehicle body is provided with a front auxiliary frame, a power battery and a rear auxiliary frame which are sequentially arranged along the length direction of the vehicle, the front auxiliary frame is arranged at a position, close to the front end of the vehicle head, of the power battery, and the rear auxiliary frame is arranged at a position, close to the rear end of the vehicle tail, of the power battery. The front auxiliary frame, the power battery and the lower vehicle body are connected to form a front end connection assembly, the rear auxiliary frame, the power battery and the lower vehicle body are connected to form a rear end connection assembly, and the power battery is further provided with a connection longitudinal beam which extends along the length direction and is respectively connected with the front end connection assembly and the rear end connection assembly. And along the length direction of the vehicle, the front auxiliary frame, the front end connecting assembly, the connecting longitudinal beam, the rear end connecting assembly and the rear auxiliary frame are sequentially connected.

By adopting the technical scheme, the front auxiliary frame, the power battery and the lower vehicle body are connected to form the front end connection assembly, and when in front collision, the structure can transfer the impact force from the front buffer system to the auxiliary frame system, and then the impact force is transferred to the rear through the connection assembly, so that the energy of the impact is transferred, and the lower edge of the battery is further protected from being impacted by the auxiliary frame. The rear auxiliary frame, the power battery and the lower vehicle body are connected to form the rear end connection assembly, the structure can well transmit the force transmitted by the battery longitudinal beam to the vehicle body, impact force is further absorbed, the battery is further prevented from being extruded and deformed, the torsional rigidity of the whole vehicle can be improved, the NVH performance is improved, and the collision performance of the whole vehicle is well improved while the transmission efficiency of the force is improved. The power battery is provided with a connecting longitudinal beam which extends along the length direction and is connected with the front end connecting assembly and the rear end connecting assembly respectively, and the front auxiliary frame, the front end connecting assembly, the connecting longitudinal beam, the rear end connecting assembly and the rear auxiliary frame are sequentially connected along the length direction of the vehicle, the connecting longitudinal beam absorbs impact force from front end connection, and meanwhile the impact force is transmitted to the rear end connecting assembly, so that the impact force of the power battery mounting frame is increased, and the battery is further protected from being damaged by the impact force and extrusion deformation.

The embodiment of the utility model also discloses a vehicle chassis structure, wherein the front end connecting assembly comprises a lower vehicle body front end connecting part, a battery front end connecting part and a front auxiliary frame connecting part which are fixedly connected; the front end connecting part of the battery is positioned at the front end of the power battery and extends towards one side of the front auxiliary frame, the front end connecting part of the lower vehicle body, the front auxiliary frame connecting part of the front auxiliary frame and the front end connecting part of the battery are sequentially overlapped along the height direction of the vehicle, at least one through hole is formed in the overlapped part of the front end connecting part of the lower vehicle body, the front auxiliary frame part of the front auxiliary frame and the front end connecting part of the battery, and the through hole sequentially penetrates through the front end connecting part of the lower vehicle body, the front auxiliary frame connecting part of the front auxiliary frame and the front end connecting part of the battery and is provided with a fastening member.

By adopting the technical scheme, after the front end connecting part of the lower vehicle body, the front auxiliary frame part and the front end connecting part of the battery are connected through the fastening member, the structure can avoid the sliding-out of the auxiliary frame in the collision process, and further better conduction impact force is generated so that the lower edge of the battery is not impacted by the auxiliary frame, and meanwhile, the disassembly and the assembly are more convenient.

The embodiment of the utility model also discloses a vehicle chassis structure, wherein the front end connecting part of the battery comprises a front battery beam fixedly connected with the shell of the power battery; wherein the lower body front end connection portion and the battery front cross member are made of lightweight metal, and the fastening member includes a threaded fastener.

By adopting the technical scheme, the front end connecting part of the lower vehicle body and the front cross beam of the battery are made of light metal, so that the light metal parts reduce the weight of the whole vehicle while ensuring the strength and the hardness of the connecting piece.

The embodiment of the utility model also discloses a vehicle chassis structure, the front cross beam of the battery comprises an integrally formed cross beam body, a plurality of energy absorption buffer parts are arranged on the cross beam body, the energy absorption buffer parts and the cross beam body are integrally formed, and an energy absorption buffer cavity is formed in each energy absorption buffer part.

By adopting the technical scheme, when the collision acting force is received, the energy absorption buffer part is collapsed and deformed, the collision force is absorbed through the deformation of the energy absorption structure, the direct action of the collision acting force on the power battery is avoided, and the safety of the battery pack is protected.

The utility model also discloses a vehicle chassis structure, wherein the rear end connecting assembly comprises a lower vehicle body rear end connecting part, a battery rear end connecting part and a rear auxiliary frame connecting part which are fixedly connected, and the battery rear end connecting part is positioned at the rear end of the power battery and extends towards one side of the rear auxiliary frame; and still include connecting element, connecting element's one end and battery rear end connecting portion fixed connection, the other end and lower automobile body rear end connecting portion and back sub vehicle frame connecting portion fixed connection to, lower automobile body rear end connecting portion and back sub vehicle frame connecting portion stack setting and with connecting element detachably fixed connection.

By adopting the technical scheme, the rear end connection assembly consisting of the lower vehicle body rear end connection part, the battery rear end connection part and the rear auxiliary frame connection part has better strength, and can transfer collision acting force out, so that the damage of the power battery is avoided.

The embodiment of the utility model also discloses a vehicle chassis structure, wherein the rear end connecting part of the battery comprises an extrusion connecting component fixedly connected with the shell of the power battery; in a cross-sectional view taken along the longitudinal direction of the vehicle, the press-fit connection member has a triangular shape, and the press-fit connection member has a battery connection end face fixedly connected to the power battery and a fixed connection end face connected to the connection member.

By adopting the technical scheme, the cross section of the extrusion connecting member is triangular, and the extrusion connecting member is provided with a battery connecting end face fixedly connected with the power battery and a fixed connecting end face connected with the connecting member. The adoption of the triangular member in cross section increases the rigidity, stability and durability of the connection portion, and at the same time, is lighter.

The embodiment of the utility model also discloses a vehicle chassis structure, wherein the rear end connecting part of the battery and the extrusion connecting member are both made of light metal, and the connecting member comprises a stud bolt.

By adopting the technical scheme, the rear end connecting part of the battery and the extrusion connecting member are all made of light metal, so that the strength and hardness of the connecting piece are ensured, and meanwhile, the weight of the vehicle is reduced; the stud connection can withstand stronger shear forces while being easier to install on the compression joint member.

The embodiment of the utility model also discloses a vehicle chassis structure, wherein the connecting longitudinal beam is fixedly connected with the shell of the power battery, and is made of light metal.

By adopting the technical scheme, the connecting longitudinal beam is made of light metal and is fixedly connected with the shell of the power battery. The connecting stringers thus have a better resistance to compression and impact, at the same time as they have a higher accuracy and a lower quality.

The embodiment of the utility model also discloses a vehicle chassis structure, two connecting longitudinal beams are arranged along the width direction of the vehicle and are arranged at the upper part of the power battery at intervals, and the two ends of each connecting longitudinal beam are connected with a front end connecting assembly and a rear end connecting assembly.

By adopting the technical scheme, the longitudinal beams and the front end connecting assemblies connected with the longitudinal beams are symmetrically arranged in the width direction, and the rear end connecting assemblies are connected with the longitudinal beams, after collision, the auxiliary frame and the longitudinal beams provide a plurality of collision force transmission paths, and the acting force of the collision is transmitted to the vehicle body or the chassis in a dispersed manner through the plurality of collision force transmission paths, so that the impact force of the battery assembly is reduced, and a distribution structure with a plurality of energy absorption and buffer transmission paths is formed.

The embodiment of the utility model also discloses a vehicle, wherein the front end connecting assembly and the rear end connecting assembly integrate the vehicle body system, the chassis system and the battery system in the length direction of the vehicle, and the front end connecting assembly and the rear end connecting assembly are in a detachable fixed connection mode.

By adopting the technical scheme, the front end connecting assembly and the rear end connecting assembly are fixedly connected in a detachable mode, and are convenient to detach and install. The vehicle body system, the chassis system and the battery system are integrated through the connecting assembly, so that structural redundancy in the length direction of the vehicle body is reduced, and the weight of the whole vehicle is further reduced; the design of the connecting assembly enables the car body and the stressed component to absorb and transmit the collision force better, so that the battery is protected from damage caused by collision force and structural deformation.

The beneficial effects of the utility model are as follows:

the application discloses vehicle chassis structure, along the length direction of vehicle, preceding sub vehicle frame, front end connection assembly, connect the longeron, rear end connection assembly and back sub vehicle frame connect gradually, when receiving the frontal collision, the collision effort can be through the power transmission route along preceding sub vehicle frame, front end connection assembly, connect the longeron, rear end connection assembly and back sub vehicle frame backward transmission in proper order, the energy-absorbing buffering of multipath and the transmission route of power are absorbed collision power transmission and are then protected power battery, when promoting the transmission efficiency of power, can also promote the torsional rigidity of whole car and promote NVH performance, fine improvement whole car collision performance. In the whole vehicle space, the vehicle chassis structure has the advantages of compact structure and space, shortens the structural dimension of the vehicle in the length direction, and improves the space utilization rate of the vehicle in the length direction.

Drawings

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

FIG. 2 is a schematic view of a front end connection assembly in a vehicle chassis structure according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a rear end connection assembly in a vehicle chassis structure according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a lower body front end connection portion; 2. a battery front end connection part; 3. a fastening member; 4. a front subframe; 5. a rear subframe; 6. a lower body rear end connection portion; 7. extruding the connecting member; 8. a stud bolt; 9. connecting a longitudinal beam; 10. a lower body; 11. a power battery; A. the longitudinal direction of the vehicle; B. the width direction of the vehicle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Example 1

The implementation of this embodiment discloses a vehicle chassis structure, please refer to fig. 1, the vehicle chassis structure includes: the lower body 10 further comprises a front auxiliary frame 4, a power battery 11 and a rear auxiliary frame 5 which are sequentially arranged along the length direction of the vehicle, wherein the front auxiliary frame 4 is arranged at a position, close to the front end of the vehicle head, of the power battery 11, and the rear auxiliary frame 5 is arranged at a position, close to the rear end of the vehicle tail, of the power battery 11. The front subframe 4, the power battery 11 and the lower body 10 are connected to form a front end connection assembly (not shown in the figure), the rear subframe 5, the power battery 11 and the lower body 10 are connected to form a rear end connection assembly (not shown in the figure), and the power battery 11 is further provided with a connection longitudinal beam 9 extending in the length direction and connected to the front end connection assembly and the rear end connection assembly respectively. And along the length direction of the vehicle, the front subframe 4, the front end connection assembly, the connection longitudinal beam 9, the rear end connection assembly and the rear subframe 5 are connected in sequence.

Specifically, the front end connection assembly is not limited to the structure in which the front subframe 4, the power battery 11, and the lower body 10 are connected, but may include, for example, a front side member, and similarly, the rear end connection assembly is not limited to the structure in which the rear subframe 5, the power battery 11, and the lower body 10 are connected, but may include, for example, a rear side member.

Along the length direction of the vehicle, the front subframe 4, the front end connection assembly, the connection longitudinal beam 9, the rear end connection assembly and the rear subframe 5 are sequentially connected to form a collision transmission path, and the transmission direction of collision force is shown by thin arrows marked along the length direction of the vehicle in fig. 1, it is understood that two collision transmission paths can be provided, that is, the front subframe 4, the front end connection assembly, the connection longitudinal beam 9, the rear end connection assembly and the rear subframe 5 are symmetrically provided along the width direction of the vehicle body, and those skilled in the art can understand that 3, 4 or other numbers of collision transmission paths can be provided. The front subframe 4, the front end connection assembly, the connection side members 9, the rear end connection assembly, and the rear subframe 5 may be connected by welding, screwing, riveting, or the like, which is not limited in this embodiment.

The embodiment of the embodiment also discloses a vehicle chassis structure, referring to fig. 2, the front end connection assembly comprises a lower vehicle body front end connection part 1, a battery front end connection part 2 and a front auxiliary frame 4 connection part which are fixedly connected; wherein battery front end connecting portion 2 is located the front end of power battery 11 and extends towards preceding sub vehicle frame 4 one side, battery front end connecting portion 2 and preceding sub vehicle frame 4 connecting portion and lower automobile body front end connecting portion 1 overlap in proper order along the direction of height of vehicle and set up to the overlapping position of lower automobile body front end connecting portion 1, preceding sub vehicle frame 4 portion and battery front end connecting portion 2 is provided with at least one through hole, and the through hole runs through battery front end connecting portion 2, preceding sub vehicle frame 4 connecting portion and battery front end connecting portion 2 in proper order, and the through hole is provided with fastening member 3.

Specifically, 2, 3, 4 or more through holes may be provided, and each through hole is provided with a fastening member 3, and the fastening member 3 may be a threaded fastener, a riveting member or the like.

Preferably, the front end connection part 2 of the battery comprises a front cross beam of the battery fixedly connected with the shell of the power battery 11; wherein the lower body front end connection portion 1 and the battery front cross member are made of lightweight metal, and the fastening member 3 comprises a threaded fastener.

Specifically, the longitudinal direction of the vehicle in the present embodiment may be referred to as the a direction in fig. 1, and the width direction of the vehicle may be referred to as the B direction in fig. 1. In this embodiment, the front end connection assembly is connected by the fastening member 3, and may be connected by bolts, studs, rivets or other detachable fixing installation means, preferably by bolts, on the premise of satisfying mechanical properties. In addition, the light metal involved in the embodiment may be a common pure aluminum material, an aluminum alloy material, or the like, and those skilled in the art may design and select the light metal according to actual needs, which is not particularly limited in the embodiment.

As further shown in fig. 2, the front end connection assembly includes a lower vehicle body front end connection portion 1, a battery front end connection portion 2, a fastening member 3, and a front subframe 4, which are located at an intersection of a rear connection portion of the front subframe 4 and a front end connection portion of the battery front end connection portion 2, and the lower vehicle body front end connection portion 1, the front subframe 4, and the battery front end connection portion 2 are sequentially stacked in the vehicle height direction, and are detachably fixed by the fastening member 3. The front battery beam comprises a beam body which is integrally formed, a plurality of energy absorption buffer parts are arranged on the beam body, the energy absorption buffer parts and the beam body are integrally formed, and an energy absorption buffer cavity is formed in each energy absorption buffer part.

Preferably, the energy absorption buffer cavity of each energy absorption unit is of a hollow hexagonal prism structure extending along the length direction, and the whole energy absorption assembly is honeycomb-shaped when the energy absorption assembly is seen along the length direction.

Preferably, the front end connecting part 1 of the underground vehicle body and the front end connecting part 2 of the battery are cast aluminum parts.

It should be noted that, when two collision paths are provided, the front end connection assembly, the connection longitudinal beam 9 and the rear end connection assembly are symmetrically distributed in the width direction of the vehicle, so that the collision force is better conducted.

By adopting the above arrangement mode, in this embodiment, the lower front end connecting part 1 of the vehicle body, the front auxiliary frame 4 and the front end connecting part 2 of the battery are sequentially overlapped, the front auxiliary frame 4 mounting part is clamped by the lower front end connecting part 1 of the vehicle body and the front end connecting part 2 of the battery, after being fastened by the fastening member 3, the front auxiliary frame 4 can be prevented from sliding out in the collision process, and the force is transmitted to the rear end of the vehicle body through the connecting longitudinal beam 9, so that the lower edge of the battery is protected from being impacted by the front auxiliary frame 4. Each energy-absorbing unit is of a hollow hexagonal prism structure, when the energy-absorbing unit is subjected to collision acting force, the energy-absorbing units of the hollow hexagonal prism structure collapse and deform, the collision force is absorbed through the deformation of the energy-absorbing structure, the collision acting force is prevented from directly acting on the power battery 11, the safety of the battery pack is protected, further, the whole energy-absorbing assembly is of a honeycomb shape, the energy-absorbing area during collision is larger, the collapse energy-absorbing is more uniform, and the energy-absorbing effect is better. The front auxiliary frame 4 is spaced from the front end of the battery, so that the distance can be saved, the space utilization rate in the vehicle body direction is improved by more than 50%, and the weight can be reduced by more than 25% by applying cast aluminum parts.

The implementation of this embodiment also discloses a vehicle chassis structure, the rear end connection assembly includes a lower vehicle body rear end connection part 6, a battery rear end connection part and a rear subframe 5 connection part which are fixedly connected, the battery rear end connection part is located at the rear end of the power battery 11 and extends towards one side of the rear subframe 5; and still include connecting elements, connecting elements's one end and battery rear end connecting portion fixed connection, the other end and lower automobile body rear end connecting portion 6 and back sub vehicle frame 5 connecting portion fixed connection to, lower automobile body rear end connecting portion 6 and back sub vehicle frame 5 connecting portion stack setting and with connecting elements detachably fixed connection.

The rear end connection part of the battery comprises an extrusion connection member 7 fixedly connected with the housing of the power battery 11; in a cross-sectional view taken along the longitudinal direction of the vehicle, the press-connection member 7 has a triangular shape, and the press-connection member 7 has a battery connection end face fixedly connected to the power battery 11 and a fixed connection end face connected to the connection member.

As shown in fig. 3, the rear end connection assembly includes a rear sub-frame 5, a lower body rear end connection portion 6, an extrusion connection member 7, and a stud 8, which are located at the intersection of the front connection portion of the rear sub-frame 5 and the connection portion of the lower body rear end connection portion 6, and the extrusion connection member 7, the rear sub-frame 5, and the lower body rear end connection portion 6 are sequentially stacked in the vehicle height direction, and are detachably fixed by the stud 8.

Specifically, in this embodiment, the rear end connection assembly is connected by the stud 8, and on the premise of satisfying the mechanical properties, a bolt, a rivet connection or other detachable and fixed mounting modes can be adopted.

Preferably, the extruded connecting member 7 and the connecting stringers 9 are made of extruded aluminum parts, and the lower body rear end connecting portion 6 is made of die-cast aluminum parts.

By adopting the above arrangement mode, in the embodiment, the extrusion connecting member 7, the rear auxiliary frame 5 and the lower vehicle body rear end connecting part 6 are sequentially overlapped, and after being fastened by the stud bolts 8, the force transmitted by the connecting longitudinal beam 9 can be well transmitted to the lower vehicle body rear end connecting part 6, so that the extrusion deformation of the battery is avoided. The structure can improve the torsional rigidity of the whole vehicle and NVH performance while improving the transmission efficiency of force, the torsional rigidity is improved by 20%, and the dynamic rigidity of the mounting part of the rear auxiliary frame 5 is improved by 500%.

The embodiment of the embodiment also discloses a vehicle chassis structure, wherein the connecting longitudinal beam 9 is fixedly connected with the shell of the power battery 11, and the connecting longitudinal beam 9 is made of light metal.

As shown in fig. 1, the battery rail system comprises a connecting rail 9, which is arranged in the longitudinal direction of the vehicle body and is fixedly connected to the outer shell of the power battery 11.

Specifically, in this embodiment, the connecting stringers 9 are extruded aluminum stringers, and the symmetrical multi-stringer installation and truss structure installation mode can be adopted without affecting the battery pack installation and the light weight requirements.

By adopting the arrangement mode, the connecting longitudinal beams 9 are symmetrically distributed by adopting extruded aluminum, and the transmission efficiency of force in the collision process is solved by adopting the lightest structure, so that the safety of a battery system is protected, and collision energy is efficiently transmitted.

The embodiment of the embodiment also discloses a vehicle chassis structure, along the width direction of the vehicle, two connecting longitudinal beams 9 are arranged at intervals on the upper part of the power battery 11, and two ends of each connecting longitudinal beam 9 are connected with a front end connecting assembly and a rear end connecting assembly.

More specifically, referring to fig. 1, the power transmission path when the vehicle chassis structure is involved in a collision will be described as an example:

after the vehicle receives a frontal collision, the collision force is sequentially transmitted backwards from the front end of the vehicle to the front subframe 4, the front end connection assembly, the connection longitudinal beam 9, the rear end connection assembly and the rear subframe 5, and because the connection longitudinal beam 9 is arranged on a battery, the collision force is mostly transmitted backwards along the connection longitudinal beam 9, so that the collision force received on the power battery 11 is very little, and the collision safety performance of the power battery 11 is ensured.

Example 2

The implementation mode of the embodiment discloses a vehicle, which comprises the vehicle chassis structure disclosed in any one of embodiment 1.

Referring to fig. 1, the vehicle chassis structure in this embodiment will be described, the vehicle including a front subframe 4, a lower vehicle body front end connecting portion 1, a battery front end connecting portion 2, and fastening members 3, connecting stringers 9, press-connecting members 7, stud bolts 8, lower vehicle body rear end connecting portion 6, and a rear subframe 5 provided in the vehicle longitudinal direction, the vehicle longitudinal direction being shown in the a direction in fig. 1, and the width direction being shown in the B direction in fig. 1, in which the respective directions of the vehicle in this embodiment are the same as those in embodiment 1.

The battery front end connecting portion 2 is arranged at the front end of the power battery 11 shell along the width direction of the vehicle, the battery front end connecting portion 2 comprises an integrally formed beam body, a plurality of energy absorption buffer portions are arranged on the beam body, the energy absorption buffer portions and the beam body are integrally formed, and an energy absorption buffer cavity is formed in each energy absorption buffer portion. The front end connecting part 1, the front auxiliary frame 4 and the front end connecting part 2 of the battery are sequentially overlapped and arranged in the height direction of the vehicle, and are detachably and fixedly installed through the fastening member 3, so that a front end connecting assembly is formed, and the front end connecting assembly is positioned at the front end part of the chassis structure of the vehicle.

In addition, as shown in fig. 2, the front end connection assembly is connected by 1 bolt, and one or more than one detachable fixed installation can be adopted on the premise of ensuring mechanical properties, and the front end connection assembly is connected by 2 bolts simultaneously.

The connecting stringers 9 are made of light metal, are arranged between the shells of the power battery 11 along the vehicle length direction, are fixedly connected with the shells of the power battery 11, and are symmetrically arranged on the shells of the power battery 11 along the vehicle width direction.

Specifically, the symmetrical multi-longitudinal beam installation and truss structure installation modes which are similar to those of extruded aluminum in mechanical properties can be adopted under the condition that the installation and the light weight of the battery pack are not affected, such as seven-series high-strength aluminum alloy and the like.

The rear end connection assembly is located the vehicle chassis rear portion, and including back sub vehicle frame 5, lower automobile body rear end connecting portion 6, extrusion connecting member 7 and stud 8, extrusion connecting member 7, back sub vehicle frame 5 and lower automobile body rear end connecting portion 6 stack in proper order and set up in the direction of vehicle height, through stud 8 detachably fixed mounting. The cross section of the press-connection member 7 in the vehicle width direction has a triangular shape, and the press-connection member 7 has a battery connection end face fixedly connected to the power battery 11 and a fixed connection end face connected to the stud bolt 8.

In addition, as shown in fig. 3, the rear end connection assembly is connected by 1 stud, and one or more than one detachable fixed installation can be adopted on the premise of ensuring mechanical properties.

In summary, the utility model discloses a vehicle with an integrated chassis system structure, wherein the chassis system comprises a front end connection assembly, a battery system and a rear end connection assembly. The front end connecting assembly comprises a lower vehicle body front end connecting part 1, a battery front end connecting part 2, a fastening member 3 and a front auxiliary frame 4, wherein a certain distance is reserved between the front auxiliary frame 4 and the front end of the battery, so that the distance can be saved, and the space utilization rate along the vehicle body direction is improved. The front end connecting assembly comprises a lower vehicle body front end connecting part 1 and a battery front end connecting part 2 which are cast aluminum parts, so that the dead weight of the vehicle is reduced. Further, the plurality of energy absorption buffer parts arranged on the battery front end connecting part 2 body absorb collision force through deformation of the energy absorption structure, so that the collision force is prevented from directly acting on the power battery 11, and the safety of the power battery 11 is protected. The battery longitudinal beam system comprises connecting longitudinal beams 9 which are symmetrically distributed by adopting extruded aluminum, and the transmission efficiency of force in the collision process is solved by adopting the lightest structure, so that the safety of the battery system is protected, and collision energy is efficiently transmitted. The rear end connection assembly comprises a rear auxiliary frame 5, a lower vehicle body rear end connection part 6, an extrusion connection member 7 and a stud bolt 8, and the connection longitudinal beam 9 transmits collision force to the lower vehicle body rear end connection part 6 so as to avoid extrusion deformation of a battery. The rear connecting assembly can improve the torsional rigidity of the whole vehicle and NVH performance while improving the transmission efficiency of force, and improves the torsional rigidity and the dynamic rigidity of the mounting part of the rear auxiliary frame 5. The front end connection assembly, the rear end connection assembly and the battery are longitudinally integrated, so that the whole vehicle efficiency is improved from two dimensions, namely, the space efficiency is improved, the structural dimension in the length direction of the vehicle is shortened by the most compact structure, and the space utilization rate in the length direction of the whole vehicle is improved; and secondly, the weight efficiency is achieved, the force transmission efficiency in the collision process is solved by the lightest structure, the safety of a battery system is protected, and the collision energy is efficiently transmitted.

Further, a description will be briefly made with reference to the chassis structure in embodiment 1 in a state where the chassis system is provided as in fig. 1 and the vehicle is subjected to a frontal collision:

as shown in fig. 1, the front sub-frame 4 is the forefront of the chassis structure of the vehicle, when the vehicle is subjected to a frontal collision, the front sub-frame 4 firstly absorbs the collision force and then transmits the part of the collision force which is not absorbed to the front end connecting assembly, the front end connecting assembly transmits part of the collision force to the front end connecting part 1 of the lower vehicle body, and the front end connecting part 1 of the lower vehicle body transmits the collision force to the vehicle body; the other part of the collision force is transmitted to the front end connecting part 2 of the battery, the cellular energy absorption buffer part formed by the front end connecting part 2 of the battery is collapsed and deformed to absorb collision energy, when the energy absorption buffer part is insufficient to absorb and offset all the collision energy, the front end connecting part 2 of the battery transmits unabsorbed energy to the extruded aluminum longitudinal beam on the installation shell of the power battery 11, the extruded aluminum longitudinal beam transmits energy to the rear end connecting assembly, and the rear end connecting assembly transmits energy to the rear auxiliary frame 5 and the rear end connecting part 6 of the lower vehicle body, and then the energy is transmitted to the vehicle body for absorption. Thereby guaranteed the security of power battery 11 through the transmission efficiency of promotion power, promoted the torsional rigidity of whole car, promoted NVH performance, shortened the length direction structural dimension of whole car when guaranteeing the security, promoted whole car space utilization, and then improved whole car performance.

It is intended that other advantages and effects of the present utility model, in addition to those described in the specific embodiments, be readily apparent to those skilled in the art from the present disclosure. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The foregoing description contains many specifics, other embodiments, and examples of specific details for the purpose of providing a thorough understanding of the utility model. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. 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.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 embodiment can be understood in a specific case by those of ordinary skill in the art.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. A vehicle chassis structure comprising a lower vehicle body, characterized by further comprising:

the front auxiliary frame, the power battery and the rear auxiliary frame are sequentially arranged along the length direction of the vehicle, the front auxiliary frame is arranged at a position, close to the front end of the vehicle head, of the power battery, and the rear auxiliary frame is arranged at a position, close to the rear end of the vehicle tail, of the power battery; wherein the method comprises the steps of

The front auxiliary frame, the power battery and the lower vehicle body are connected to form a front end connection assembly, the rear auxiliary frame, the power battery and the lower vehicle body are connected to form a rear end connection assembly, and the power battery is also provided with a connection longitudinal beam which extends along the length direction and is respectively connected with the front end connection assembly and the rear end connection assembly; and is also provided with

Along the length direction of vehicle, preceding sub vehicle frame front end connection assembly, connect longeron, rear end connection assembly and back sub vehicle frame connects gradually.

2. The vehicle chassis structure of claim 1, wherein the front end connection assembly includes a fixedly connected lower body front end connection, a battery front end connection, and a front subframe connection; wherein the method comprises the steps of

The battery front end connecting part is positioned at the front end of the power battery and extends towards one side of the front auxiliary frame, the lower vehicle body front end connecting part, the front auxiliary frame connecting part and the battery front end connecting part are sequentially overlapped along the height direction of the vehicle, and

the front end connecting part of the battery, the front auxiliary frame connecting part and the superposition part of the front end connecting part of the battery are provided with at least one through hole, the through hole sequentially penetrates through the front end connecting part of the lower vehicle body, the front auxiliary frame connecting part and the front end connecting part of the battery, and the through hole is provided with a fastening member.

3. The vehicle chassis structure of claim 2, wherein the battery front end connection portion includes a battery front cross member fixedly connected with the housing of the power battery; wherein the method comprises the steps of

The lower body front end connection portion and the battery front cross member are made of lightweight metal, and the fastening member includes a threaded fastener.

4. A vehicle chassis structure according to claim 3 wherein said battery front cross member includes an integrally formed cross member body having a plurality of energy absorbing cushioning portions disposed thereon, said energy absorbing cushioning portions being integrally formed with said cross member body, an energy absorbing cushioning cavity being formed in each of said energy absorbing cushioning portions.

5. The vehicle chassis structure of claim 1, wherein the rear end connection assembly includes a lower body rear end connection portion, a battery rear end connection portion, and a rear subframe connection portion fixedly connected, the battery rear end connection portion being located at a rear end of the power battery and extending toward a side of the rear subframe; and is also provided with

The automobile body is characterized by further comprising a connecting member, one end of the connecting member is fixedly connected with the rear end connecting part of the battery, the other end of the connecting member is fixedly connected with the rear end connecting part of the lower automobile body and the rear auxiliary frame connecting part, and the rear end connecting part of the lower automobile body and the rear auxiliary frame connecting part are overlapped and are detachably and fixedly connected with the connecting member.

6. The vehicle chassis structure of claim 5, wherein the battery rear end connection portion includes a press connection member fixedly connected with the housing of the power battery; wherein the method comprises the steps of

In a cross-sectional view taken along a longitudinal direction of the vehicle, the press-connection member has a triangular shape, and has a battery connection end face fixedly connected with the power battery and a fixed connection end face connected with the connection member.

7. The vehicle chassis structure of claim 6, wherein said battery rear end connection and said extruded connection member are each made of a lightweight metal, said connection member comprising a stud bolt.

8. The vehicle chassis structure of claim 7, wherein said connecting stringers are fixedly attached to said power battery outer shell, said connecting stringers being made of a lightweight metal.

9. The vehicle chassis structure according to any one of claims 1 to 8, wherein two of the connecting stringers are provided in the width direction of the vehicle and are provided at an upper portion of the power battery at intervals, and both ends of each of the connecting stringers are connected to the front end connecting assembly and the rear end connecting assembly.

10. A vehicle comprising a vehicle chassis structure according to any one of claims 1 to 9.