CN112373568A

CN112373568A - MPV lower vehicle body structure

Info

Publication number: CN112373568A
Application number: CN202010698740.2A
Authority: CN
Inventors: 李直腾; 刘烨; 唐春柳; 周文斌; 劳兵; 潘洵兴; 陈家均
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-02-19
Anticipated expiration: 2040-07-20
Also published as: CN112373568B

Abstract

The invention discloses an MPV lower vehicle body structure which comprises a floor assembly and a vehicle frame assembly arranged below the floor assembly, wherein the vehicle frame assembly comprises two front longitudinal beams, two threshold beams, two rear longitudinal beams, a front anti-collision beam, a front wall plate cross beam, a front floor cross beam, a spare tire compartment cross beam, a first rear floor cross beam, a second rear floor cross beam, a third rear floor cross beam, a fourth rear floor cross beam, a seat pit cross beam and a rear anti-collision beam, which are sequentially and longitudinally arranged from front to back, and the floor assembly is provided with a spare tire compartment body for placing a spare tire at a corresponding position between the front floor cross beam and the first rear floor cross beam. The MPV lower vehicle body has a simple structure, improves the space inside the vehicle and the luggage compartment, expands the use scene of the vehicle, improves the riding comfort of the vehicle, is beneficial to the protection of a spare tire, and has excellent safety performance and NVH performance.

Description

MPV lower vehicle body structure

Technical Field

The invention relates to the technical field of automobile bodies, in particular to an MPV lower body structure.

Background

MPV of prior art gets off body structure, it is half formula body structure generally as shown in fig. 1 to bear, front longitudinal beam 6 and back longitudinal beam 7 connect together and form the longeron structure that runs through the front and back, it has front anticollision roof beam 1 to control to arrange between two longeron structures, preceding bounding wall crossbeam 2, crossbeam structures such as preceding floor crossbeam 3 and back floor crossbeam 4, Y threshold tie-beam 8 has been arranged respectively to the longeron outside of the left and right sides and has been extended to threshold inner panel 9, the longeron structure, crossbeam structure and threshold tie-beam 8 form a very strong network structure, and simultaneously, MPV floor of prior art is the level and smooth structure as shown in fig. 2, generally arrange in the top of longeron structure. Such a structure has the following disadvantages:

1. the middle and rear seats are required to be arranged on the upper part of the floor, namely, the middle and rear seats are arranged above the whole longitudinal beam, and the space in the vehicle is limited;

2. the spare tire compartment body can only be arranged at the lower part of the rear end of the rear floor, occupies the space of the trunk and is not beneficial to protecting the spare tire;

3. an exhaust system is arranged below the front row of seats, and more space is wasted.

Disclosure of Invention

The present invention has been made to solve the disadvantages of the prior art, and an object of the present invention is to provide an MPV lower vehicle body structure having a simple structure, which improves the space inside a vehicle and a trunk, expands a use scenario of the vehicle, improves riding comfort of the vehicle, facilitates protection of a spare tire, and has excellent safety performance and NVH performance.

The MPV lower vehicle body structure comprises a floor assembly and a vehicle frame assembly arranged below the floor assembly, wherein the vehicle frame assembly comprises two front longitudinal beams, two threshold beams, two rear longitudinal beams, a front anti-collision beam, a front coaming cross beam, a front floor cross beam, a spare tire compartment cross beam, a first rear floor cross beam, a second rear floor cross beam, a third rear floor cross beam, a fourth rear floor cross beam, a seat pit cross beam and a rear anti-collision beam which are sequentially and transversely arranged from front to rear, the two front longitudinal beams, the two threshold beams and the two rear longitudinal beams are respectively arranged on the left side and the right side in parallel, the front ends of the two front longitudinal beams and the left side of the front anti-collision beam, the rear ends of the front longitudinal beams and the front ends of the threshold beams, the rear ends of the threshold beams and the rear longitudinal beams, and the left side and the right side of the rear anti-collision beam, the rear ends of the two rear longitudinal beams and the left side and the right side of the rear anti-, The left and right sides of preceding bounding wall crossbeam and two the rear portion of front longitudinal beam the left and right sides and two of preceding bounding wall crossbeam the front portion of threshold roof beam and the left and right sides and two of spare tyre cabin crossbeam be two-layer type between the front portion of threshold roof beam fixed, first back floor crossbeam the floor crossbeam behind the second floor crossbeam behind the third floor crossbeam the fourth back floor crossbeam with seat hole crossbeam by preceding to the back all with the two-layer type of back longitudinal beam is fixed, the floor assembly by preceding floor crossbeam extends to back anticollision roof beam, the floor assembly is in preceding floor crossbeam with corresponding position department between the first back floor crossbeam is provided with the spare tyre cabin body that is used for placing the spare tyre.

The lower vehicle body structure of the MPV can also be as follows:

the floor assembly is in the fourth rear floor crossbeam with corresponding position department between the back anticollision roof beam is provided with the seat hole body that is used for the folding placing of third row seat, third row seat movable connect in the bottom of seat hole body.

The floor assembly comprises a left floor, a right floor, a central channel front section and a spare tire compartment cover plate assembly, the left floor and the right floor are symmetrically arranged on the left side and the right side, the central channel front section is longitudinally clamped at the central positions of the left floor and the right floor, the front portion of the spare tire compartment cover plate assembly is detachably fixed with the central channel front section, and the left side and the right side of the spare tire compartment cover plate assembly are respectively detachably fixed with the left floor and the right floor on the left side and the right side of the front portion of the spare tire compartment body.

The spare tire cabin cover plate assembly comprises a spare tire cabin cover plate body and two layers of spare tire cabin cover plates fixed on the spare tire cabin cover plate body, a central channel rear section, a left seat mounting plate, a right seat mounting plate and a rear end cross beam, wherein the left seat mounting plate and the right seat mounting plate are fixed on the left side and the right side of the middle of the central channel rear section in a bilateral symmetry mode, the outer side of the left seat mounting plate and the outer side of the right seat mounting plate are detachably fixed on the front floor assembly respectively, the rear end cross beam is fixed on the rear portion of the central channel rear section in a vertical two-layer mode, and the left side and the right side of the rear end cross beam are detachably fixed on the front floor assembly respectively.

The left seat mounting panel with equal two-layer type is fixed with interior seat reinforcing plate on the right seat mounting panel, and the inboard front foot of the first row of seat of the left and right sides all passes through interior seat reinforcing plate with left side seat mounting panel with right side seat mounting panel is detachable fixed.

The rear side bilateral symmetry two-layer type of rear end crossbeam is fixed with interior seat support, and the inboard back foot of the first row seat of left and right sides all passes through interior seat support with the rear end crossbeam is detachable fixed.

An upper longitudinal beam component is fixed above the floor assembly at a position corresponding to the front longitudinal beam in a two-layer mode, and the upper longitudinal beam component penetrates through the floor assembly from front to back.

The floor assembly is in the outside front foot of first row seat corresponds position department two-layer type and is fixed with outer seat reinforcing plate, the inside and outside both sides of outer seat reinforcing plate respectively with last longeron subassembly with the two-layer type of threshold inner panel is fixed, the outside front foot of seat pass through outer seat reinforcing plate with the floor assembly is detachable fixed.

The floor assembly is in the outside rear foot of first row seat corresponds position department two-layer type and is fixed with outer seat support, the inside and outside both sides of outer seat support respectively with go up longeron subassembly with the two-layer type of threshold inner panel is fixed, the outside rear foot of first row seat passes through outer seat support with the floor assembly is detachable fixed.

The outer side of the threshold beam is provided with at least two threshold connecting beams respectively, and the inner side and the outer side of each threshold connecting beam are fixed with the threshold beam and the inner plate of the threshold in a two-layer mode.

The MPV lower vehicle body structure comprises a floor assembly and a vehicle frame assembly arranged below the floor assembly, wherein the vehicle frame assembly comprises two front longitudinal beams, two threshold beams, two rear longitudinal beams, a front anti-collision beam, a front coaming cross beam, a front floor cross beam, a spare tire compartment cross beam, a first rear floor cross beam, a second rear floor cross beam, a third rear floor cross beam, a fourth rear floor cross beam, a seat pit cross beam and a rear anti-collision beam which are sequentially and transversely arranged from front to rear, the two front longitudinal beams, the two threshold beams and the two rear longitudinal beams are respectively arranged on the left side and the right side in parallel, the front ends of the two front longitudinal beams and the left side of the front anti-collision beam, the rear ends of the front longitudinal beams and the front ends of the threshold beams, the rear ends of the threshold beams and the rear longitudinal beams, and the left side and the right side of the rear anti-collision beam, the rear ends of the two rear longitudinal beams and the left side and the right side of the rear anti-, The left and right sides of preceding bounding wall crossbeam and two the rear portion of front longitudinal beam the left and right sides and two of preceding bounding wall crossbeam the front portion of threshold roof beam and the left and right sides and two of spare tyre cabin crossbeam be two-layer type between the front portion of threshold roof beam fixed, first back floor crossbeam the floor crossbeam behind the second floor crossbeam behind the third floor crossbeam the fourth back floor crossbeam with seat hole crossbeam by preceding to the back all with the two-layer type of back longitudinal beam is fixed, the floor assembly by preceding floor crossbeam extends to back anticollision roof beam, the floor assembly is in preceding floor crossbeam with corresponding position department between the first back floor crossbeam is provided with the spare tyre cabin body that is used for placing the spare tyre. Thus, the two front longitudinal beams, the two threshold beams and the two rear longitudinal beams are respectively arranged on the left side and the right side in parallel, the rear ends of the front longitudinal beams are fixed with the front ends of the threshold beams in a two-layer mode, the rear ends of the threshold beams are fixed with the front ends of the rear longitudinal beams in a two-layer mode, the front longitudinal beams, the threshold beams and the rear longitudinal beams form longitudinal beam structures penetrating from the front anti-collision beams to the rear anti-collision beams on the left side and the right side of the automobile, a front wall cross beam, a front floor cross beam, a spare tire compartment cross beam, a first rear floor cross beam, a second rear floor cross beam, a third rear floor cross beam, a fourth rear floor cross beam and a seat pit cross beam are sequentially arranged between the front anti-collision beams and the rear anti-collision beams from front to back, so that a closed force transmission channel is formed, and when the automobile is collided, collision force is transmitted and reduced gradually through the layer by, finally, the beams are converged on the same cross beam or longitudinal beam, and the directions are opposite and offset, so that the front collision, offset collision and side collision of the automobile are superior, and the connection rigidity and strength of each fixed point meet the NVH performance requirements. The spare tire compartment cross beam is positioned at the rear part of the front wall plate cross beam and at the front part of the first rear floor cross beam, the floor assembly is provided with a spare tire compartment body for placing a spare tire at a corresponding position between the front wall plate cross beam and the first rear floor cross beam, so that the spare tire is placed in the spare tire compartment body, the spare tire is further positioned between two closed loop force transmission channels formed by the threshold beam, the front wall plate cross beam and the first rear floor cross beam in a surrounding manner, when an automobile is collided, collision force is transmitted and reduced progressively through the front wall plate cross beam and the first rear floor cross beam, the collision of the automobile can not generate invasion to the spare tire compartment body, the spare tire is further protected from collision, when the spare tire is placed in the spare tire compartment body, the spare tire compartment body can bear the whole weight of the spare tire, and the spare tire compartment cross beam is arranged below the spare tire compartment body, the spare tire compartment cross beam can share partial weight of the spare tire, reduces deformation of the spare tire compartment body caused after the spare tire is placed in the spare tire compartment body, and further increases rigidity and strength of the floor assembly at the corresponding position of the spare tire compartment body. Compared with the prior art, the lower vehicle body structure of the MPV has the advantages that: the automobile spare tire protection device has the advantages of being simple in structure, improving the space of the interior and the trunk of the automobile, expanding the use scene of the automobile, improving the riding comfort of the automobile, being beneficial to protection of a spare tire, and being excellent in safety performance and NVH performance.

Drawings

Fig. 1 is a schematic view of a structure of a lower vehicle body of an MPV in the prior art.

FIG. 2 is a cross-sectional view of a lower vehicle body of a MPV of the prior art taken along C-C in FIG. 1.

FIG. 3 is a schematic view of a lower vehicle body structure of an MPV of the present invention.

FIG. 4 is a cross-sectional view taken along A-A of the lower vehicle body structure 3 of an MPV of the present invention.

FIG. 5 is a cross-sectional view taken along B-B of FIG. 3 of a lower vehicle body of an MPV according to the present invention.

FIG. 6 is a cross-over view of the spare wheel well cover assembly and peripheral components of the MPV lower vehicle body structure of the present invention.

FIG. 7 is a vertical view of the third row of seats of the MPV lower body structure of the present invention.

FIG. 8 is a folded view of the third row of seats of the MPV lower body structure of the present invention.

FIG. 9 is a view showing the third row of seats and the peripheral components of the MPV lower body structure according to the present invention.

Description of the figures

1 … front impact beam 2 … cowl cross member 3 … front floor cross member

4 … rear floor beam 5 … rear impact beam 6 … front longitudinal beam

7 … back longitudinal beam 8 … doorsill connecting beam 9 … doorsill inner panel

10 … spare wheel cabin body 11 … seat pit body 12 … spare wheel cabin crossbeam

13 … first rear floor Beam 14 … second rear floor Beam 15 … third rear floor Beam

16 … fourth rear floor cross member 17 … seat pit cross member 18 … rocker beam

19 … center tunnel front section 20 … center tunnel rear section 21 … left seat mounting plate

22 … Right seat mounting plate 23 … spare wheel well cover body 24 … rear end beam

25 … upper longitudinal beam assembly 26 … left floor 27 … right floor

28 … first upper longitudinal beam 29 … second upper longitudinal beam 30 … outer seat gusset

31 … outer seat support 32 … front extension beam 33 … rear floor stringer

34 … Link 35 … seat body attachment point 36 … seat floor attachment point

37 … airbag control module mounting point 38 … shifter stiffener

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

An MPV lower body structure according to the present invention will be described in further detail with reference to fig. 3 to 9 of the accompanying drawings.

The MPV lower vehicle body structure comprises a floor assembly and a vehicle frame assembly arranged below the floor assembly, wherein the vehicle frame assembly comprises two front longitudinal beams 6, two threshold beams 18 and two rear longitudinal beams 7 which are sequentially and longitudinally arranged from front to back, and a front anti-collision beam 1, a front bulkhead cross beam 2, a front floor cross beam 3, a spare tire compartment cross beam 12, a first rear floor cross beam 13, a second rear floor cross beam 14, a third rear floor cross beam 15, a fourth rear floor cross beam 16, a seat pit cross beam 17 and a rear anti-collision beam 5 which are sequentially and transversely arranged from front to back, the two front longitudinal beams 6, the two threshold beams 18 and the two rear longitudinal beams 7 are respectively and parallelly arranged on the left side and the right side, the front ends of the two front longitudinal beams 6 and the left side and the right side of the front anti-collision beam 1, and the front ends of the front longitudinal beams 6 and the threshold beams 18, The rear end of the threshold beam 18 and the front end of the rear longitudinal beam 7, the rear ends of the two rear longitudinal beams 7 and the left and right sides of the rear anti-collision beam 5, the left and right sides of the front dash cross beam 2 and the rear parts of the two front longitudinal beams 6, the left and right sides of the front floor cross beam 3 and the front parts of the two threshold beams 18, and the left and right sides of the spare tire compartment cross beam 12 and the front parts of the two threshold beams 18 are fixed in a two-layer manner, the first rear floor cross beam 13, the second rear floor cross beam 14, the third rear floor cross beam 15, the fourth rear floor cross beam 16 and the seat pit cross beam 17 are fixed with the rear longitudinal beam 7 in a two-layer manner from front to rear, the floor assembly is extended to the rear anti-collision beam 5 from the front floor beam 3, and a spare tire compartment body 10 for placing a spare tire is arranged at a corresponding position between the front floor beam 3 and the first rear floor beam 13. Thus, the two front longitudinal beams 6, the two threshold beams 18 and the two rear longitudinal beams 7 are respectively arranged on the left side and the right side in parallel, the rear end of the front longitudinal beam 6 is fixed with the front end of the threshold beam 18 in a two-layer mode, the rear end of the threshold beam 18 is fixed with the front end of the rear longitudinal beam 7 in a two-layer mode, the front longitudinal beam 6, the threshold beam 18 and the rear longitudinal beam 7 form a longitudinal beam structure penetrating from the front anti-collision beam 1 to the rear anti-collision beam 5 on the left side and the right side of the automobile, a front wall cross beam 2, a front floor cross beam 3, a spare tire compartment cross beam 12, a first rear floor cross beam 13, a second rear floor cross beam 14, a third rear floor cross beam 15, a fourth rear floor cross beam 16 and a seat pit cross beam 17 are sequentially arranged between the front anti-collision beam 1 and the rear anti-collision beam 5 from front to rear, a closed force transmission channel is formed, and when the automobile is collided, the force is transmitted layer by layer and layer, finally, the beams are converged on the same cross beam or longitudinal beam, and the directions are opposite and offset, so that the front collision, offset collision and side collision of the automobile are superior, and the connection rigidity and strength of each fixed point meet the NVH performance requirements. The spare tire compartment cross beam 12 is located at the rear part of the front wall cross beam 2 and the front part of the first rear floor cross beam 13, the floor assembly is provided with a spare tire compartment body 10 for placing a spare tire at a corresponding position between the front floor cross beam 3 and the first rear floor cross beam 13, so that the spare tire is placed inside the spare tire compartment body 10, and further the spare tire is located between two closed loop force transmission channels formed by the threshold beam 18, the front wall cross beam 2 and the first rear floor cross beam 13, when the automobile is collided, the collision force is transmitted and decreased through the front wall cross beam 2 and the first rear floor cross beam 13, so that the collision of the automobile does not generate invasion amount to the spare tire compartment body 10, and further the spare tire is protected from collision, and when the spare tire is placed in the spare tire compartment body 10, the spare tire compartment body 10 is required to bear the whole weight of the spare tire, the spare tire compartment cross beam 12 is arranged below the spare tire compartment body 10, the spare tire compartment cross beam 12 can share part of the weight of a spare tire, the deformation of the spare tire compartment body 10 caused after the spare tire is placed in is reduced, and the rigidity and the strength of the floor assembly at the corresponding position of the spare tire compartment body 10 are further increased. Compared with the prior art, the lower vehicle body structure of the MPV has the advantages that: the automobile spare tire protection device has the advantages of being simple in structure, improving the space of the interior and the trunk of the automobile, expanding the use scene of the automobile, improving the riding comfort of the automobile, being beneficial to protection of a spare tire, and being excellent in safety performance and NVH performance.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the front longitudinal beam 6 is further provided with a front extension beam 32 between positions corresponding to fixing points of the front dash cross beam 2 and the front floor cross beam 3, the front extension beam 32 extends from the front longitudinal beam 6 to the front floor cross beam 3, and the front end and the rear end of the front extension beam 32 are respectively fixed with the front longitudinal beam 6 and the front floor cross beam 3 in a two-layer mode. Thus, when the automobile is collided, the force transmission channel from the front longitudinal beam 6 to the front floor cross beam 3 is added to the front extension beam 32, namely, the collision force of the front floor cross beam 3 can be partially dispersed and transmitted to the front longitudinal beam 6, and also can be partially dispersed and transmitted to the front floor cross beam 3 through the collision force of the front longitudinal beam 6, so that the probability of deformation of the front longitudinal beam 6 or the front floor cross beam 3 caused by stress is reduced, and the strength and the rigidity of the front longitudinal beam 6 and the front floor cross beam 3 are further increased.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the rear longitudinal beam 7 comprises two L-shaped plates, and the two L-shaped plates are fixedly surrounded in a two-layer mode to form the rear longitudinal beam 7 with the cross section of a closed structure shaped like a Chinese character 'kou'. Like this, "mouthful" font enclosed construction's cross section is for using the perpendicular to 7 length direction's of back longeron plane will the cross-section that back longeron 7 was cut open, back longeron 7 is "mouthful" font enclosed construction, and stability is higher than "U" type structure among the prior art far away, makes back longeron 7 is more stable when the car receives the collision, and usually the bottom of back longeron 7 is provided with back suspension spring mounting point for the mounting point of second row seat and third row seat can reduce extremely back longeron 7 bottom flushes with back suspension spring mounting point, and then has improved the interior high space of car greatly.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the floor assembly is provided with a seat pit body 11 for folding and placing a third row of seats at a corresponding position between the fourth rear floor beam 16 and the rear anti-collision beam 5, and the third row of seats are movably connected to the bottom of the seat pit body 11. Like this, third row seat is put into around swivelling joint point backward rotation after folding seat hole body 11, the back and the car carpet in the back of the chair of third row seat flush, and the position of third row seat originally becomes can be used for placing object article, has expanded the use scene of vehicle greatly, sits in the passenger during the seat of second row, the seat of second row is followed seat guide rail is slided backward, increases passenger's the space of taking, and the space at second row seat rear can be used for placing object article completely, when the passenger need be taken to the seat of third row, rotates the third row seat along swivelling joint point forward upright, the inner space of seat hole body 11 still can be used for placing object article, and then the use scene of vehicle has been expanded greatly to the setting of seat hole body 11. According to a further preferable technical scheme, seat body fixing points 35 are respectively arranged at the front part, the middle part and the rear part of the bottom of the third row of seats, seat floor fixing points 36 are respectively arranged in front of the seat pit body 11, on the inner wall of the seat pit body 11 and at the bottom of the seat pit body 11, at least two connecting rods 34 are detachably fixed between the third row of seats and the floor assembly, the upper ends of the connecting rods 34 are rotatably connected with the third row of seats at positions corresponding to the seat body fixing points 35, and the lower ends of the three connecting rods 34 are rotatably connected with the floor assembly at positions corresponding to the seat floor fixing points 36. Thus, since the seat pit body 11 and the floor assembly are integrally fixed, the lower ends of at least two of the connecting rods 34 are rotatably connected to the floor assembly at positions corresponding to the seat floor fixing points 36, the lower ends of at least two of the links 34 are rotatably connected to the floor assembly, and the upper end of the connecting rod 34 is rotatably connected with the third row seats respectively at the front, middle and rear of the third row seats, when the third row of seats needs to be lifted, the third row of seats is pulled forwards, the upper end and the lower end of the connecting rod 34 rotate around the seat body fixing point 35 and the seat floor fixing point 36 respectively, the bottom of the third row seat and the floor assembly maintain a horizontal position, following the instability and deformability of the parallelogram, and the third row seat can be translated and lifted for use by the passenger. In a further preferred embodiment, at least two seat slide rails are longitudinally and detachably fixed to the floor assembly at positions corresponding to the second row of seats, and the second row of seats is slidably connected to the seat slide rails. Like this, the second row seat can be followed the seat slide rail is slided from beginning to end for the adjustment the comfort of taking of second row seat, when the folding placing of third row seat in the seat hole body 11, the second row seat can be pushed backward to the very end of seat slide rail realizes the width maximize of second row seat, and then furthest's increase the comfort of taking of second row seat.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the floor assembly comprises a left floor 26, a right floor 27, a central channel front section 19 and a spare tire compartment cover plate assembly, wherein the left floor 26 and the right floor 27 are symmetrically arranged on the left side and the right side, the central channel front section 19 is longitudinally clamped at the central positions of the left floor 26 and the right floor 27, the front part of the spare tire compartment cover plate assembly is detachably fixed with the central channel front section 19, and the left side and the right side of the spare tire compartment cover plate assembly are detachably fixed with the left floor 26 and the right floor 27 on the left side and the right side of the front part of the spare tire compartment body 10 respectively. Thus, the floor assembly comprises a left floor 26 and a right floor 27 which are symmetrically arranged at the left side and the right side, a center tunnel front section 19 and a spare wheel well cover assembly are longitudinally arranged from front to rear in the middle of the left floor panel 26 and the right floor panel 27, and the front side of the floor assembly is fixed to the dash panel in two layers, the front section 19 of the central passage is fixed with the front wall in two layers, the spare wheel well cover body 23 is detachably fixed with the front section 19 of the central passage at the corresponding position of the front part of the spare wheel well body 10, when the spare tire is needed to be taken or placed, the second row of seats can slide backwards along the seat slide rail, then, the spare tire is taken out or put in from the upper rear part of the spare tire compartment body 10, so that the space utilization rate of the front area of the floor assembly can be improved, and the rear space of the floor assembly is further left for storing more articles, luggage and the like. A further preferred technical scheme is that the spare tire compartment cover plate assembly includes a spare tire compartment cover plate body 23, and a central channel rear section 20, a left seat mounting plate 21, a right seat mounting plate 22 and a rear end cross beam 24 which are fixed on the spare tire compartment cover plate body 23 in a two-layer manner, the left seat mounting plate 21 and the right seat mounting plate 22 are fixed on the left side and the right side of the middle part of the central channel rear section 20 in a bilateral symmetry two-layer manner, the outer side of the left seat mounting plate 21 and the outer side of the right seat mounting plate 22 are respectively fixed with the front floor assembly in a detachable manner, the rear end cross beam 24 is fixed on the rear part of the central channel rear section 20 in a two-layer manner, and the left side and the right side of the rear end cross beam 24 are respectively fixed with. Thus, the left seat mounting plate 21 and the right seat mounting plate 22 are symmetrically fixed on the left and right sides of the middle part of the central channel rear section 20 in a two-layer manner, the middle part of the rear end beam 24 is fixed on the rear part of the central channel rear section 20 in a two-layer manner, the left and right sides of the rear end beam 24 are detachably fixed on the left floor 26 and the right floor 27 respectively, so that the central channel rear section 20, the left seat mounting plate 21, the right seat mounting plate 22 and the rear end beam 24 form a structure in the shape of a Chinese character 'tu', the left seat mounting plate 21 and the right seat mounting plate 22 are detachably fixed on the left floor 26 and the right floor 27 respectively, the left and right sides of the rear end beam 24 are detachably fixed on the left floor 26 and the right floor 27 respectively, and the central channel front section 19, the central channel rear section 20 and the spare tire cabin cover plate assembly form a complete force transmission channel, when the automobile is collided, collision force is transmitted to the central channel rear section 20 through the central channel front section 19 in turn, and then conducted to the left floor 26, the right floor 27 and the rear end cross member 24 through the left seat mounting plate 21, the right seat mounting plate 22 and the rear portion of the center tunnel rear section 20 at the middle portion of the center tunnel rear section 20, and then conducted to the left and right floor boards 26 and 27 through the left and right sides of the rear-end cross member 24, therefore, the collision force borne by the front section 19 of the central passage is respectively transmitted to a plurality of points of the left floor 26 and the right floor 27, so that a complete force transmission passage is formed, the intrusion amount of the spare tire placing space at the lower part of the front floor body during collision can be effectively reduced, the collision safety performance is improved, and the NVH performance of the front floor area is improved. A further preferable technical scheme is that the left seat mounting plate 21 and the right seat mounting plate 22 are both fixed with an inner seat reinforcing plate in a two-layer manner, and inner front feet of the first row of seats on the left side and the right side are detachably fixed with the left seat mounting plate 21 and the right seat mounting plate 22 through the inner seat reinforcing plate. Like this, the inboard preceding foot of the first row seat of the left and right sides passes through interior seat reinforcing plate is installed left side seat mounting panel 21 with on the right seat mounting panel 22, the effort that first row seat bore passes through interior seat reinforcing plate transmission dispersion extremely left side seat mounting panel 21 with on the right seat mounting panel 22, can not lead to because of stress concentration interior seat reinforcing plate left side seat mounting panel 21 with risk such as fracture takes place for right seat mounting panel 22, thereby reduces left side seat mounting panel 21 with right seat mounting panel 22's stress range, and then through the effectual installation intensity who strengthens the seat of interior seat reinforcing plate.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the rear side of the rear end cross beam 24 is fixed with an inner seat support in a bilateral symmetry two-layer mode, and the rear feet at the inner side of the first row of seats at the left side and the right side are detachably fixed with the rear end cross beam 24 through the inner seat support. Thus, the inner rear feet of the first row of seats on the left side and the right side are mounted on the rear end cross beam 24 through the inner seat mounting supports, the acting force borne by the seats is transmitted and dispersed to the rear end cross beam 24 through the inner seat mounting supports, risks such as cracking of the inner seat mounting supports and the rear end cross beam 24 due to stress concentration are avoided, the stress range of the rear end cross beam 24 is reduced, and the mounting strength of the seats is effectively enhanced through the inner seat mounting supports.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: a gear shifter reinforcing plate 38 and an airbag control module mounting point 37 are arranged on the central channel rear section 20, the gear shifter is detachably fixed on the central channel rear section 20 through the gear shifter reinforcing plate 38, and the airbag control module is detachably fixed on the central channel rear section 20 through the airbag control module mounting point 37. Thus, the center channel rear section 20 is generally located on the central axis of the whole vehicle, and the airbag control module is integrated on the center channel rear section 20, so that the airbag control module can simultaneously receive collision forces from the front, rear, left and right directions of the whole vehicle, and then judges and controls whether the airbag is opened or not. The shifter is mounted in the middle of the rear section 20 of the central passage, i.e. on the right hand of the driver, so that the driver can hold the handle of the shifter by naturally laying down the right hand when operating, and the requirements of ergonomics are met. A nut may be fixed to the bottom of the shifter reinforcing plate 38, a bolt may be inserted from above the shifter, the bolt may pass through the shifter and the shifter reinforcing plate 38 in this order, and the nut may be screwed to the bottom of the shifter reinforcing plate 38. Similarly, a bolt may be inserted from above a position corresponding to the airbag control module mounting point 37 on the center tunnel rear section 20, and the bolt sequentially passes through the airbag control module and the center tunnel rear section 20, and the position corresponding to the airbag control module mounting point 37 on the center tunnel rear section 20 is fixed to a nut by screwing.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: an upper longitudinal beam component 25 is fixed above the floor assembly at a position corresponding to the front longitudinal beam 6 in a two-layer mode, and the upper longitudinal beam component 25 penetrates through the floor assembly from front to back. Therefore, the upper longitudinal beam assembly 25 is aligned with the front longitudinal beam 6, the cavity height of the front longitudinal beam 6 is increased, when the front longitudinal beam 6 is collided with an automobile, collision force is transmitted on the front longitudinal beam 6 and the upper longitudinal beam assembly 25 at the same time, the upper longitudinal beam assembly 25 shares part of collision force required to be transmitted by the front longitudinal beam 6, the stability of the front longitudinal beam 6 is further increased, and the safety performance of frontal collision of the automobile is improved. In a further preferred embodiment, the upper longitudinal beam assembly 25 includes a first upper longitudinal beam 28 and a second upper longitudinal beam 29, a front portion of the first upper longitudinal beam 28 is fixed to the front panel in two layers, a rear portion of the first upper longitudinal beam 28 is fixed to a front portion of the second upper longitudinal beam 29 in two layers, and an outer side of the rear portion of the second upper longitudinal beam 29 is fixed to the rocker inner panel 9 in two layers. In this way, when the upper side member assembly 25 is handled in a stepwise manner, the first upper side member 28 is located forward of the second upper side member 29 when the collision force is transmitted to the upper side member assembly 25, and the collision force received by the first upper side member 28 is greater than that received by the second upper side member 29, so that the thickness of the first upper side member 28 needs to be greater than that of the second upper side member 29, and the collision force received by the second upper side member 29 is relatively small, so that the thickness of the second upper side member 29 is appropriately reduced according to the actual situation, and the entire vehicle body can be made lighter.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the floor assembly is in the outside front foot of first row seat corresponds position department two-layer type and is fixed with outer seat reinforcing plate 30, the inside and outside both sides of outer seat reinforcing plate 30 respectively with last longeron subassembly 25 with the two-layer type of threshold inner panel 9 is fixed, the outside front foot of seat pass through outer seat reinforcing plate 30 with the floor assembly is detachable fixed. Thus, on the one hand, the outer seat reinforcing plate 30 increases a force transmission channel between the upper longitudinal beam component 25 and the inner doorsill plate 9, disperses the collision force received by the upper longitudinal beam component 25, so that the upper longitudinal beam component 25 and the floor assembly are not easy to deform when the automobile collides, and further prevents the spare tire compartment body 10 from intruding to extrude a spare tire placed in the spare tire compartment body when the automobile collides, on the other hand, the outer front feet of the first row of seats are installed on the floor assembly through the outer seat reinforcing plate 30, the acting force borne by the seats is transmitted and dispersed to the upper longitudinal beam component 25, the inner doorsill plate 9 and the floor assembly through the outer seat reinforcing plate 30, and risks such as cracking of the outer seat reinforcing plate 30 and the floor assembly due to stress concentration can be avoided, so that the stress range of the floor assembly is reduced, the mounting strength of the first row seat is further effectively enhanced by the outer seat reinforcement plate 30.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the floor assembly is in the outside rear foot of first row seat corresponds position department two-layer type and is fixed with outer seat support 31, the inside and outside both sides of outer seat support 31 respectively with last longeron subassembly 25 with the two-layer type of threshold inner panel 9 is fixed, the outside rear foot of first row seat passes through outer seat support 31 with the floor assembly is detachable fixed. Thus, the rear foot of the outer side of the first row of seats is installed on the floor assembly through the outer seat support 31, the acting force borne by the seats is transmitted and dispersed to the upper longitudinal beam component 25, the inner sill plate 9 and the floor assembly through the outer seat support 31, and risks such as cracking of the outer seat support 31 and the floor assembly and the like caused by stress concentration are avoided, so that the stress range of the floor assembly is reduced, and the installation strength of the first row of seats is effectively enhanced through the outer seat support 31.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the outer side of the threshold beam 18 is respectively provided with at least two threshold connecting beams 8, and the inner side and the outer side of each threshold connecting beam 8 are respectively fixed with the threshold beam 18 and the threshold inner plate 9 in a two-layer mode. Like this, threshold tie-beam 8 has increased threshold roof beam 18 with pass power passageway between the threshold inner panel 9, when the side impact takes place for threshold inner panel 9, the impact passes through threshold tie-beam 8 dispersion is passed through to threshold roof beam 18 is last, threshold roof beam 18 redisperses to each crossbeam on, has avoided threshold roof beam 18 is inboard spare tyre cabin body 10 because threshold roof beam 18 with threshold inner panel 9 warp and receives the extrusion.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: the number of the doorsill connecting beams 8 on the left side and the right side is five, and the five doorsill connecting beams 8 are uniformly distributed between the doorsill beam 18 and the doorsill inner plate 9. Like this, when the car takes place the side and bumps, threshold inner panel 9 receives the effect of crashing force after, with the transmission of crashing force extremely on the threshold tie-beam 8, and five threshold tie-beam 8 evenly distributed is in threshold roof beam 18 with between the threshold inner panel 9, consequently the crashing force also through five threshold tie-beam 8 evenly distributed arrives on the threshold roof beam 18, again by threshold roof beam 18 disperse to each with on the crossbeam that threshold roof beam 18 is fixed, and then avoided threshold roof beam 18 is inboard spare tyre cabin body 10 because threshold roof beam 18 with threshold inner panel 9 warp and receive the extrusion.

Referring to fig. 3 to 9, the lower vehicle body structure of an MPV according to the present invention may further include: at least one rear floor small longitudinal beam 33 is longitudinally arranged between the fourth rear floor cross beam 16 and the seat pit cross beam 17 in parallel, and the front end and the rear end of the rear floor small longitudinal beam 33 are respectively fixed with the fourth rear floor cross beam 16 and the seat pit cross beam 17 in a two-layer mode. In this way, the force transmission channels of the fourth rear floor cross beam 16 and the seat pit cross beam 17 are added to the rear floor minor longitudinal beam 33, so that at least two closed force transmission channels are formed between the fourth rear floor cross beam 16 and the seat pit cross beam 17, and then the collision force applied to the fourth rear floor cross beam 16 or the seat pit cross beam 17 can be dispersed and transmitted through the rear floor minor longitudinal beam 33, so that the possibility of deformation of the fourth rear floor cross beam 16 and the seat pit cross beam 17 due to the collision force is reduced, the safety performance of the seat pit body 11 is improved, and the third row of seats or articles and the like stored in the seat pit body 11 are protected.

The above description is only for the purpose of illustrating a few embodiments of the present invention, and should not be taken as limiting the scope of the present invention, in which equivalent changes, modifications, or scaling up or down, etc. made in accordance with the spirit of the present invention should be considered as falling within the scope of the present invention.

Claims

1. The utility model provides a car body structure under MPV which characterized in that: the vehicle frame assembly comprises a floor assembly and a vehicle frame assembly arranged below the floor assembly, wherein the vehicle frame assembly comprises two front longitudinal beams, two threshold beams, two rear longitudinal beams, a front anti-collision beam, a front coaming cross beam, a front floor cross beam, a spare tire cabin cross beam, a first rear floor cross beam, a second rear floor cross beam, a third rear floor cross beam, a fourth rear floor cross beam, a seat pit cross beam and a rear anti-collision beam which are sequentially and longitudinally arranged from front to back, the front longitudinal beams, the two threshold beams and the two rear longitudinal beams are respectively arranged on the left side and the right side in parallel, the front end of the front longitudinal beam and the left side and the right side of the front anti-collision beam, the rear end of the front longitudinal beam and the front end of the threshold beam, the rear end of the rear longitudinal beam and the left side and the right side of the rear anti-collision beam, the left side and the right side of the front coaming cross beam and the two rear end of the front, The left and right sides of preceding floor crossbeam and two the front portion of threshold roof beam and the left and right sides and two of spare tyre cabin crossbeam it is fixed that two-layer formula is between the front portion of threshold roof beam, first back floor crossbeam second back floor crossbeam third back floor crossbeam fourth back floor crossbeam with seat hole crossbeam by preceding to the back all with the two-layer formula of back longeron is fixed, the floor assembly by preceding floor crossbeam extends to back anticollision roof beam, the floor assembly is in preceding floor crossbeam with corresponding position department between the first back floor crossbeam is provided with the spare tyre cabin body that is used for placing the spare tyre.

2. An MPV lower body structure according to claim 1, wherein: the floor assembly is in the fourth rear floor crossbeam with corresponding position department between the back anticollision roof beam is provided with the seat hole body that is used for the folding placing of third row seat, third row seat movable connect in the bottom of seat hole body.

3. An MPV lower body structure according to claim 1, wherein: the floor assembly comprises a left floor, a right floor, a central channel front section and a spare tire compartment cover plate assembly, the left floor and the right floor are symmetrically arranged on the left side and the right side, the central channel front section is longitudinally clamped at the central positions of the left floor and the right floor, the front portion of the spare tire compartment cover plate assembly is detachably fixed with the central channel front section, and the left side and the right side of the spare tire compartment cover plate assembly are respectively detachably fixed with the left floor and the right floor on the left side and the right side of the front portion of the spare tire compartment body.

4. An MPV lower body structure according to claim 3, characterized in that: the spare tire cabin cover plate assembly comprises a spare tire cabin cover plate body and two layers of spare tire cabin cover plates fixed on the spare tire cabin cover plate body, a central channel rear section, a left seat mounting plate, a right seat mounting plate and a rear end cross beam, wherein the left seat mounting plate and the right seat mounting plate are fixed on the left side and the right side of the middle of the central channel rear section in a bilateral symmetry mode, the outer side of the left seat mounting plate and the outer side of the right seat mounting plate are detachably fixed on the front floor assembly respectively, the rear end cross beam is fixed on the rear portion of the central channel rear section in a vertical two-layer mode, and the left side and the right side of the rear end cross beam are detachably fixed on the front floor assembly respectively.

5. An MPV lower body structure according to claim 4, wherein: the left seat mounting panel with equal two-layer type is fixed with interior seat reinforcing plate on the right seat mounting panel, and the inboard front foot of the first row of seat of the left and right sides all passes through interior seat reinforcing plate with left side seat mounting panel with right side seat mounting panel is detachable fixed.

6. An MPV lower body structure according to claim 4, wherein: the rear side bilateral symmetry two-layer type of rear end crossbeam is fixed with interior seat support, and the inboard back foot of the first row seat of left and right sides all passes through interior seat support with the rear end crossbeam is detachable fixed.

7. An MPV lower body structure according to any of claims 1-6, wherein: an upper longitudinal beam component is fixed above the floor assembly at a position corresponding to the front longitudinal beam in a two-layer mode, and the upper longitudinal beam component penetrates through the floor assembly from front to back.

8. An MPV lower body structure according to claim 7, wherein: the floor assembly is in the outside front foot of first row seat corresponds position department two-layer type and is fixed with outer seat reinforcing plate, the inside and outside both sides of outer seat reinforcing plate respectively with last longeron subassembly with the two-layer type of threshold inner panel is fixed, the outside front foot of seat pass through outer seat reinforcing plate with the floor assembly is detachable fixed.

9. An MPV lower body structure according to claim 7, wherein: the floor assembly is in the outside rear foot of first row seat corresponds position department two-layer type and is fixed with outer seat support, the inside and outside both sides of outer seat support respectively with go up longeron subassembly with the two-layer type of threshold inner panel is fixed, the outside rear foot of first row seat passes through outer seat support with the floor assembly is detachable fixed.

10. An MPV lower body structure according to any of claims 1-6, wherein: the outer side of the threshold beam is provided with at least two threshold connecting beams respectively, and the inner side and the outer side of each threshold connecting beam are fixed with the threshold beam and the inner plate of the threshold in a two-layer mode.