CN105904923B

CN105904923B - A kind of modular vehicle structure

Info

Publication number: CN105904923B
Application number: CN201610402212.1A
Authority: CN
Inventors: 钟志华; 莫旭辉
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2016-06-08
Filing date: 2016-06-08
Publication date: 2018-12-25
Anticipated expiration: 2036-06-08
Also published as: CN105904923A

Abstract

The invention discloses a modular vehicle structure. The vehicle structure includes a car body frame, a vehicle front axle and a vehicle rear axle mounted on the car body frame; the vehicle front axle includes a front axle bridge body and a front axle suspension; the vehicle rear axle includes a rear axle bridge body and rear axle suspension; the rear axle body includes a front connecting plate and a rear connecting plate, and a plurality of longitudinal beams; the front connecting plate and the rear connecting plate are fixedly connected together by a plurality of longitudinal beams to form an integral cage Structure; the front bridge body includes a left bridge body unit and a right bridge body unit formed by fixedly connecting multiple connecting plates and longitudinal beams, and the symmetrically arranged left bridge body unit and the right bridge body unit are fixed by a plurality of beams The connection forms an integral cage structure; the present invention integrates the modular design of the front and rear axle assemblies into the vehicle body bearing in the vehicle configuration, replacing the function of part of the body frame, and further realizes the lightweight design of the bus.

Description

A kind of modular vehicle structure

Technical field

The present invention relates to a kind of modular vehicle structures, belong to topics on vehicle structure technology field more particularly to a kind of length Wheelbase low-floor lightweight car.

Background technique

Traditional passenger train plan is by side (square) shape steel pipe body frame, preceding double transverse arms (torsion bar damper), rear whole bridge (leaf spring Damper), fuel power forerunner or rear Driving force system composition, structure type leads to have higher flooring design, wheelbase compared with Short, due to substantially using steel or cast iron materials, by welding or be spirally connected, cause space utilization lower, weight is larger, And oil consumption is high, not energy-efficient and environmental protection.Only a few car uses the self-supporting body of truss structure, and vehicle body load is total to by entire vehicle frame With carrying, forward and backward bridge is separately mounted to corresponding position in the form of assembly, can reduce complete vehicle quality to a certain extent, mention High vehicle driving performance.

In order to further realize lightweight target, part of the manufacturer makes bearing-type as major body material using aluminium alloy Bus body, but its realization rate is mainly the light weight having paid larger cost, but having been realized by aluminium and steel simple replacement Change horizontal lower.

Summary of the invention

In view of the above drawbacks of the prior art, the present invention is intended to provide a kind of modular vehicle structure, the vehicle structure The forward and backward axle assembly of modularized design is participated in vehicle configuration in vehicle body carrying, instead of part body frame Car light-weight design is furthermore achieved in function.

To achieve the goals above, the technical scheme adopted by the invention is that:

A kind of modular vehicle structure, including body framing, bridge and vehicle rear axle before the vehicle on body framing；Institute Bridge includes preceding bridge pontic and front axle suspension before stating vehicle；The vehicle rear axle includes rear axle pontic and rear axle suspension；Its structure is special Point is that the rear axle pontic includes preceding connecting plate and rear connecting plate and more stringers；The preceding connecting plate and rear connecting plate are logical Excessive root stringer is fixed together to form monoblock type cage structure；And/or the preceding bridge pontic includes left front connecting plate, a left side Afterwards connecting plate, it is right before connecting plate behind connecting plate and the right side；Wherein fixed between left front connecting plate, left back connecting plate by more stringers It is joined together to form left pontic unit, is fixed together between connecting plate by more stringers behind connecting plate and the right side before right Right pontic unit is formed, is fixedly connected to form between symmetrically arranged left pontic unit and right pontic unit by more crossbeams whole Body formula cage structure；It is preferred that every crossbeam is fixedly linked using two U-shaped beams docking and to form box element and/or every stringer is adopted It is fixedly linked to form box element with two U-shaped beam docking.

According to an embodiment of the invention, can also make further optimization to the present invention, the following are the skills formed after optimization Art scheme:

The front axle suspension is allocated as left front bridge suspension unit and right front axle suspension unit, and the two is symmetrical structure, Mei Geqian Bridge suspension unit includes a upper swing arm, two independent lower swing arms and elastic element；The wherein inner end of every group of lower swing arm and forerunner Dynamic bridge bracket connection, the outer end of this group of lower swing arm is articulated and connected with corresponding front steering section；The upper swing arm and corresponding forward It is articulated and connected to section, elastic element is equipped on the upper swing arm, the upper end of the elastic element is connect with a pallet, in pallet and together Vibration damper assembly is connected between a wherein lower swing arm for side；It is preferred that elastic element is air spring；It is preferred that bridge is outstanding before each In frame unit, it is bent and deformed with the direction of two lower swing arms organized from inside to outside and gradually collapses.

The stringer of the left pontic unit and right pontic unit is three stringers of gap arrangement from bottom to top, i.e., lower vertical Beam, middle stringer and upper longitudinal beam；Wherein the middle position of upper longitudinal beam is disconnected, and separated position is equipped with for installing elasticity in The mounting base of element, the mounting base and upper longitudinal beam form overall structure；It is preferred that the left pontic unit and right pontic unit it Between be fixedly linked by four crossbeams, the both ends of four crossbeams are separately connected the middle stringer and lower stringer of corresponding side；It is preferred that upper vertical Beam oriented intermediate trend collapsed during extending from mounting base to two sides.The upper longitudinal beam is close to spring mounting seat as a result, Middle position avoids beam body and bears torque, simplifies the force environment of beam body.

In order to improve the structural strength of crossbeam, every crossbeam is fixedly linked to form box element using two U-shaped beam docking. A closed cavity is formd among beam body by this kind of flat welding process as a result, the structure is made to have good mechanical property Energy.

In order to avoid the bounce envelope range of wheel, upper longitudinal beam oriented intermediate receipts during extending from mounting base to two sides The trend held together.

The rear axle suspension is double sideway arm configurations of vehicle rear axle Length discrepancy.The double cross arm structures of the Length discrepancy refer to Wire length differs between forming the interior outside installation point of two swing arms up and down of the suspension, and wherein upper swing arm length accounts for about bottom brachium 50%-the 90%, preferably 60% -70% of degree, this kind design are conducive to be promoted the overall performance of the suspension, reduce tire wear.

The rear axle suspension includes symmetrically arranged two rear axle suspension units, and each rear axle suspension unit includes upper pendulum Arm, the lower swing arm below upper swing arm and the elastic element that upper swing arm and upper swing arm side are set；Each rear axle suspension The upper swing arm and lower swing arm of unit are connected on corresponding stringer, and the elastic element of each rear axle suspension unit passes through elastic element Mounting base is mounted on corresponding stringer.

The left front connecting plate, left back connecting plate, it is right before behind connecting plate and the right side connecting plate outer wall be equipped with it is multiple for connecting The connecting bracket of bridge pontic and body frame before connecing；It is preferred that the left front connecting plate, left back connecting plate, it is right before behind connecting plate and the right side Connecting plate is integrally similar to obtuse triangle structure.

Five stringers are connected between the preceding connecting plate and rear connecting plate；Five stringers are divided into three layers from bottom to top；It is excellent It selects and is provided with suspension erection support on a stringer of lower layer and two stringers in middle layer, two stringers on upper layer pass through the bullet The top of property element mounting base, and be fixed together with elastic element mounting base.

Driving motor before being installed on preceding bridge pontic, the output shaft of the preceding driving motor and the input terminal of front reduction gear box assembly Connection, two output ends of front reduction gear box assembly are connect with the inner end of two driving front semiaxis respectively, the driving front semiaxis Outer end passes through corresponding front steering section, and is connect respectively with left front wheel assembly and off-front wheel assembly by front-wheel hub unit.

The left and right sides of rear axle pontic be symmetrical arranged rear steering section, between rear axle pontic and rear steering section be arranged after on The inner end of swing arm and rear lower swing arm, rear upper swing arm is connect with rear axle pontic, and the outer end of rear upper swing arm is connect with rear steering section；Under afterwards The inner end of swing arm is connect with rear axle pontic, and the outer end of rear lower swing arm is connect with rear steering section, the side before and after upper swing arm after every The first rear axle suspension spring and the second rear axle suspension spring is respectively set, the lower end of each rear axle suspension spring is equal It is connect with the rear lower swing arm of respective side, rear shock absorber assembly is set in the side of the second rear axle suspension spring.

Driving motor after being installed on the rear axle pontic, the input of the output shaft of the rear driving motor and rear reduction gearbox assembly End connection, two output ends of rear reduction gearbox assembly are connect with the inner end of jackshaft after two respectively, the rear jackshaft Outer end pass through corresponding rear steering section, and connect with rear wheel assembly by front-wheel hub unit.

Preferably, the vehicle is long wheelbase low-floor vehicle.

Compared with prior art, the beneficial effects of the present invention are: the present invention is directed to the structure of conventional truck, especially car Feature, by the optimization innovative design of each system, by modular exploitation, car body of aluminum alloy frame design is real effectively to solve Steel combined with aluminum application problem in bus body is avoided and is simply piled up using material caused by aluminum alloy materials completely, Two kinds of lightweighting materials of aluminium alloy and high-strength steel are applied, the performance of two kinds of materials has been given full play to.With green energy conservation, intensity The features such as high, light-weight, modularization, so that car is had preferable lightweight performance and significantly simplified the production of car.

Detailed description of the invention

Fig. 1 is the structure principle chart of one embodiment of the invention；

Fig. 2 is the main view of Fig. 1；

Fig. 3 is the top view of Fig. 2；

Fig. 4 is the structure principle chart of preceding bridge of the present invention；

Fig. 5 is the top view of Fig. 4；

Fig. 6 is the front view of Fig. 4；

Fig. 7 is the bottom view of Fig. 4；

Fig. 8 is the left view of Fig. 4.

Fig. 9 is the structure principle chart of rear axle of the present invention；

Figure 10 is the top view of Fig. 9；

Figure 11 is the front view of Fig. 9；

Figure 12 is the bottom view of Fig. 9；

Figure 13 is the left view of Fig. 9.

In figure

1- the near front wheel；2- off-front wheel；3,4- crossbeam；5- air spring；6,7- front steering section；8- connecting bracket；11, 12,13,21,22,23-stringers；The left front connecting plate of 14-；The left back connecting plate of 15-；Connecting plate before 24- is right；Connecting plate after 25- is right； 16,17,26,27- lower swing arm；18,28- mounting base；19,29 upper swing arms；51- left rear wheel group；52- off hind wheel group；Connect before 53- Fishplate bar；Connecting plate after 54-；55,56,57,58,59- stringer；60,61- upper swing arms；62,63- lower swing arms；64- installation component； 65- elastic element mounting base；Bridge before 100- vehicle；200- vehicle rear axle；300- body frame.

Specific embodiment

Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that in the feelings not conflicted Under condition, the feature in embodiment and embodiment in the present invention be can be combined with each other.For sake of convenience, hereinafter as occurred "upper", "lower", "left", "right" printed words only indicate consistent with the upper and lower, left and right direction of attached drawing itself, do not play limit to structure It is set for using.

A kind of modularization passenger train plan, as shown in Figure 1-3, include respectively by aluminium alloy production bus body skeleton 300, Bridge 100,200 three parts module of vehicle rear axle before vehicle.Wherein body frame 300 use aluminum alloy section by joggle and The mode of welding is constituted, and preceding bridge module and rear axle module are made using high-strength steel material.

The present invention has characteristics that

(1) modularized design

The car is mainly made of body frame, preceding bridge module, rear axle module three parts.Preferably, can be according to circumstances Different dynamical systems is selected, includes pure electric vehicle, pure fuel oil, hybrid power.Pass through this kind of modularized design

(2) lightweight body frame

The bus body skeleton main body application aluminum alloy materials, main supporting part is monolithic construction, according to structure spy It puts and requires local stiffening, have many advantages, such as low-floor design characteristics, intensity height, light weight, simple process.Structurally, Body frame presents the feature of disconnection in front-rear axle installation region, without girder construction in the lower side skeleton at this, is vacated Space for installing front-rear axle.

Forward and backward bridge passes through four connectors respectively and links together with body frame, after current, rear axle and vehicle frame installation, Front-rear axle skeleton and body frame are closely connected as an overall structure, act as the structure composition that body frame disconnects out.

(3) bridge and vehicle rear axle before the vehicle of high-strength bracing members

In the present invention, as shown in Figure 4-8, the basic composition feature of preceding bridge are as follows: mainly by preceding bridge pontic and front axle suspension two Most of composition.Wherein, preceding bridge pontic is by 11,12,13,21,22,23, four connecting plates 14,15,24,25, four of six roots of sensation stringer Root crossbeam 3,4 forms, wherein every side front axle suspension has used three stringers to be divided into for connecting in front axle suspension lower swing arm 16,26 Side installation point, 29,29 inside installation point of front axle suspension upper swing arm and air spring 5, six roots of sensation stringer are respectively designated as from top to bottom Lower stringer 11,21, middle stringer 12,22 and upper longitudinal beam 13,23,3 beams are respectively constituted with 2 connecting plates 14,15 respectively at this Left and right unit.Front axle suspension is a kind of double ball-joint independence front axle suspensions different from the double transverse arm front axle suspensions of way-train, before this Bridge suspension is made of a upper swing arm, two independent lower swing arms and elastic element, damping element.

In the present invention, the essential characteristic of preceding bridge pontic are as follows: each beam body is all made of using 2 U-shaped high-strength steel beam body butt welding Made of box-shaped part, a closed cavity is formd among beam body by this kind of flat welding process, has the structure good Good mechanical property.It wherein descends stringer 11,21 and middle stringer 12,22 is the straight beam not disconnected, be provided in beam body corresponding position The erection support of front axle suspension swing arm.Upper longitudinal beam 13,23 of the invention is disconnected for middle position, with front front axle suspension air bullet The cupuliform mounting base of spring is welded as a whole, which avoids beam body receiving close to the middle position of air spring mounting base Torque simplifies the force environment of beam body.The beam body from the cupuliform mounting base toward two sides extend during oriented intermediate collapse Trend, be mainly used for avoiding the bounce envelope range of wheel.

From the point of view of front view, three stringers of every side front axle suspension are connected to forward and backward company in a manner of through connection On fishplate bar, then each bridge unit have it is left front, left back, right before, it is right after four pieces of connecting plates.The connecting plate from the point of view of front view, It will be connected with the three of Triangle-Profile stringers, it is triangular shaped totally to present class.The plate is made of high-strength steel It forms, is selected according to the load condition of be adapted to vehicle using unilateral plate, if high-strength steel can be used for the larger vehicle of load Box-shaped part made of butt welding is made.

Four crossbeams are connected to the both ends of stringer 13,23 and stringer 12,22, which uses U-shaped high-strength using 2 Box-shaped part made of girder steel body butt welding forms a closed cavity by this kind of flat welding process among beam body, makes this Structure has good mechanical property.By the connection of four beams, left and right pontic unit is connected as to the heavily fortified point of a cage structure Gu whole.

The front axle suspension of the invention lower swing arm before one group of each side setting of front driving axle bracket, the bottom before every group Arm is divided into front and back two, and the inner end of each preceding lower swing arm is connect by rubber bushing with front driving axle bracket, front lower with two in group The direction of swing arm from inside to outside, which is bent and deformed, gradually collapses, and the outer end of preceding lower swing arm passes through ball stud and front steering section 6, 7 connections, upper swing arm before being equipped with above lower swing arm before every group, the preceding upper swing arm are triangle, an angle of preceding upper swing arm It is connected by ball stud and front steering section 6,7, front front axle suspension spring is set on the preceding upper swing arm, the front front axle is outstanding The lower end of frame elastic element is connect with preceding upper swing arm, and the upper end of front front axle suspension spring is connect with pallet, in pallet and together Front damper assembly is connected between a wherein preceding lower swing arm for side, driving motor before being installed on the front driving axle bracket, The output shaft of the preceding driving motor is connect with the input terminal of front reduction gear box assembly, two output ends of front reduction gear box assembly respectively with The inner end connection of two driving front semiaxis, the outer end of the driving front semiaxis pass through corresponding front steering section 6, and 7, and pass through front-wheel Hub unit is connect with preceding wheel assembly.

Using above technical scheme, ipsilateral preceding upper swing arm and two preceding lower swing arms constitute double ball-joint independence front axle suspensions, Preceding upper swing arm 16,26, preceding lower swing arm 19,29 are connected by ball stud and front steering section 6,7, so that being mounted on ball stud Front steering section 6,7 has the rotary freedom of multiple directions, and the pivot stud of traditional structure virtual in this way is more advantageous to promotion vehicle Steering behaviour.Two ipsilateral preceding lower swing arms have bending features, not only structural strength is good, and can be used to avoid before Take turns the interference in steering procedure.On preceding upper swing arm by pallet be arranged front front axle suspension spring, and pallet with it is ipsilateral A wherein preceding lower swing arm between connect front damper assembly, it is compact-sized, be easy to arrange and install, make before drive steeraxle With good damping performance.

In preceding bridge pontic, in each front axle suspension unit, pass through with the direction of two lower swing arms organized from inside to outside curved Song deformation is gradually collapsed.The left front connecting plate, left back connecting plate, it is right before behind connecting plate and the right side connecting plate outer wall be equipped with it is multiple Connecting bracket for bridge pontic and body frame before connecting；It is preferred that connecting plate before the left front connecting plate, left back connecting plate, the right side Obtuse triangle structure is integrally similar to connecting plate behind the right side；The upper swing arm is integrally triangular in shape.The upper swing arm is under Swing arm is forged steel pieces or wrought aluminium part；It is preferred that the upper swing arm is integrally triangular in shape；It is preferred that the preceding bridge pontic uses high-strength steel At.

Before the vehicle bridge be car before drive steeraxle.

In the present invention, as described and depicted in figs. 9-13, the basic composition feature of rear axle are as follows: by rear axle pontic and the big portion of rear axle suspension two It is grouped as.Wherein, rear axle pontic is made of five stringers, two connecting plates, is respectively designated as stringer 55, left stringer from top to bottom 56, right vertical beam 57 and left stringer 58, right vertical beam 59.Stringer 55 is used to install the lower swing arm of left and right rear axle suspension, left stringer at this 56 and right vertical beam 57 be respectively used to connection rear axle suspension upper swing arm, left stringer 56 and right vertical beam 57 are respectively used to connection left and right elasticity Element mounting base.Rear axle suspension is the integral bridge type rear axle suspension that a kind of vehicle rear axle is different from way-train at this, and is used Double sideway arm configurations of vehicle rear axle Length discrepancy a kind of, the rear axle suspension is by a upper swing arm, a lower swing arm and elasticity member Part, damping original part are constituted.

In the present invention, the essential characteristic of rear axle pontic are as follows: each beam body is all made of using 2 U-shaped high-strength steel beam body butt welding Made of box-shaped part, a closed cavity is formd among beam body by this kind of flat welding process, has the structure good Good mechanical property.Wherein each stringer is the straight beam not disconnected, is installed in stringer 55 and left stringer 56,57 corresponding positions of right vertical beam It is equipped with rear axle suspension erection support.Left stringer 58 and right vertical beam 59 in the present invention install branch with elastic element in a manner of perforative Seat links together, and is welded as a whole with the erection support of elastic element, interposition of the stringer close to air spring mounting base It sets, avoids beam body and bear torque, simplify the force environment of beam body.

In rear axle pontic, the rear upper swing arm of the same side and rear lower swing arm constitute double transverse arm rear axle suspensions；It is preferred that upper afterwards put Arm and rear lower swing arm are trapezoidal；It is preferred that the upper swing arm and lower swing arm are forged steel pieces or wrought aluminium part.The first rear rear axle suspension Elastic element and the second rear rear axle suspension spring are air spring or helical spring.The preceding connecting plate and rear connecting plate are equal Whole is in inverted trapezoidal；It is preferred that preceding connecting plate and rear connecting plate are that box shaped member is made in high-strength steel.Every stringer uses two U-shaped beams Docking is fixedly linked to form box element；It is preferred that stringer is the straight beam not disconnected.As a result, by this kind of flat welding process in stringer Centre forms a closed cavity, and the structure is made to have good mechanical property.

The vehicle rear axle is car rear driving axle.

From the point of view of front view, five stringers are connected on forward and backward connecting plate in a manner of through connection, pass through the party Formula constitutes an overall structure.The connecting plate will be connected, always from the point of view of front view with the five of Triangle-Profile stringers Body presents upside-down trapezoid shape.Plate box-shaped part made of high-strength steel butt welding is made, the forward and backward connecting plate Together with five stringers, a firm cage structure is constituted, it is common to bear rear axle suspension load.

The parameter for the high-strength steel that the present invention addresses are as follows: tensile strength: TS >=340MPa(cold rolling)；TS >=370MPa (hot rolling And pickling)；Or yield strength: YS >=210MPa.

The content that above-described embodiment illustrates should be understood as that these embodiments are only used for being illustrated more clearly that the present invention, without For limiting the scope of the invention, after the present invention has been read, those skilled in the art are to various equivalent forms of the invention Modification each fall within the application range as defined in the appended claims.

Claims

1. A modular vehicle structure, comprising a car body frame (300), a vehicle front axle (100) and a vehicle rear axle (200) mounted on the car body frame; the vehicle front axle (100) includes a front axle body and front axle suspension; the vehicle rear axle (200) includes a rear axle body and a rear axle suspension; it is characterized in that,

The rear axle body includes a front connecting plate (53) and a rear connecting plate (54), as well as a plurality of longitudinal beams; the front connecting plate (53) and the rear connecting plate (54) are fixedly connected on the form an integral cage structure together; the rear axle suspension is a double-wishbone structure with unequal lengths on the vehicle rear axle; the rear axle suspension includes two rear axle suspension units arranged symmetrically, each rear axle The suspension unit includes an upper swing arm, a lower swing arm located below the upper swing arm, and elastic elements arranged beside the upper swing arm and the upper swing arm; the upper swing arm and the lower swing arm of each rear axle suspension unit are connected to corresponding On the longitudinal beam, the elastic element of each rear axle suspension unit is installed on the corresponding longitudinal beam through the elastic element mounting seat (65); the front connecting plate (53) and the rear connecting plate (54) are connected with Five stringers (55,56,57,58,59); the five stringers are divided into three layers from bottom to top; one stringer (55) on the lower layer and two stringers (56,57) on the middle layer There is a suspension mounting support on the top, and the two longitudinal beams (58, 59) on the upper layer pass through the top of the elastic element mounting seat (65) and are fixedly connected with the elastic element mounting seat (65);

and / or

The front axle body includes a left front connecting plate (14), a left rear connecting plate (15), a right front connecting plate (24) and a right rear connecting plate (25); wherein the left front connecting plate (14), the left rear connecting plate ( 15) are fixedly connected together by multiple longitudinal beams to form the left bridge body unit, and the right front connecting plate (24) and the right rear connecting plate (25) are fixedly connected together by multiple longitudinal beams to form the right bridge body unit. The symmetrically arranged left axle unit and the right axle unit are fixedly connected by multiple beams to form an integral cage structure; the front axle suspension is divided into a left front axle suspension unit and a right front axle suspension unit, both of which are Symmetrical structure, each front axle suspension unit includes an upper swing arm, two independent lower swing arms and elastic elements; the inner end of each set of lower swing arms is connected to the front drive axle support, and the outer end of the set of lower swing arms is connected to the corresponding The front steering knuckle is hingedly connected; the upper swing arm is hingedly connected with the corresponding front steering knuckle, an elastic element is arranged on the upper swing arm, the upper end of the elastic element is connected with a tray, and the tray is connected with one of the same side A shock absorber assembly is connected between the lower swing arms; the longitudinal beams of the left and right bridge units are three longitudinal beams arranged with gaps from bottom to top, that is, the lower longitudinal beams (11, 21), the middle Longitudinal beams (12, 22) and upper longitudinal beams (13, 23); wherein the middle position of the upper longitudinal beams (13, 23) is disconnected, and a mounting seat (18) for installing elastic elements is provided at the middle disconnected position , 28), the mounting seat and the upper longitudinal beam (13, 23) form an integral structure; the upper longitudinal beam (13, 23) tends to converge toward the middle when extending from the mounting seat (18, 28) to both sides .

2. The modular vehicle structure of claim 1, wherein the elastic element is an air spring.

3. The modular vehicle structure according to claim 1, characterized in that, in each front axle suspension unit, the two lower swing arms of the same group are gradually gathered together through bending deformation from the inside to the outside.

4. The modular vehicle structure according to claim 1, characterized in that, the left bridge body unit and the right bridge body unit are fixedly connected by four beams (3, 4), and the two ends of the four beams are respectively Connect the center stringers (12,22) and lower stringers (11,21) of the corresponding sides.

5. The modular vehicle structure according to claim 1, characterized in that, each crossbeam is butted and fixedly connected by two U-shaped beams to form a box-shaped element and/or each longitudinal beam is butted and fixedly connected by two U-shaped beams Form a box-shaped element.

6. The modular vehicle structure according to any one of claims 1-5, characterized in that, the left front connecting plate (14), the left rear connecting plate (15), the right front connecting plate (24) and the right rear connecting plate (25) The outer wall is provided with a plurality of connecting brackets (8) for connecting the front axle body and the body frame.

7. The modular vehicle structure according to claim 6, characterized in that, the left front connecting plate (14), the left rear connecting plate (15), the right front connecting plate (24) and the right rear connecting plate (25) are all The whole is similar to obtuse triangle structure.

8. The modular vehicle structure according to any one of claims 1-5, wherein a front drive motor is installed on the front axle body, and the output shaft of the front drive motor is connected to the input end of the front reduction box assembly , the two output ends of the front reduction box assembly are respectively connected to the inner ends of the two front drive half shafts, and the outer ends of the front drive half shafts pass through the corresponding front steering knuckles (6, 7) and pass through the front wheel hub The units are respectively connected with the left front wheel assembly and the right front wheel assembly.

9. The modularized vehicle structure according to any one of claims 1-5, characterized in that the rear steering knuckles are arranged symmetrically on the left and right sides of the rear axle body, and the upper steering knuckle is arranged between the rear axle body and the rear steering knuckle. Swing arm and lower swing arm, the inner end of the upper swing arm is connected with the rear axle body, the outer end of the upper swing arm is connected with the rear steering knuckle; the inner end of the lower swing arm is connected with the rear axle body, and the outer end of the lower swing arm is connected with the rear axle The steering knuckle is connected, and the first elastic element and the second elastic element are respectively arranged on the front and rear sides of each upper swing arm. device assembly.

10. The modularized vehicle structure according to claim 9, wherein a rear drive motor is installed on the rear axle body, the output shaft of the rear drive motor is connected to the input end of the rear reduction box assembly, and the rear deceleration The two output ends of the box assembly are respectively connected with the inner ends of the two rear drive half shafts, and the outer ends of the rear drive half shafts pass through the corresponding rear steering knuckles and are connected with the rear wheel assembly through the rear hub unit.