CN106428238B

CN106428238B - Rear floor structure for increasing passenger cabin space

Info

Publication number: CN106428238B
Application number: CN201611090186.XA
Authority: CN
Inventors: 曾凤; 和丽梅; 劳兵; 林秋华; 汪德强
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2016-11-29
Filing date: 2016-11-29
Publication date: 2023-05-26
Anticipated expiration: 2036-11-29
Also published as: CN106428238A

Abstract

The invention provides a rear floor structure for increasing the space of a passenger cabin, and belongs to the field of automobile part structures. The invention comprises an automobile frame and a rear floor assembly, wherein the automobile frame consists of a rear girder assembly and a rear cross beam at the left side and the right side of an automobile, a bulge part is arranged at the joint of the automobile frame, the automobile frame is arranged in the bulge part, the rear girder assembly comprises a rear girder and a rear girder inner plate, the rear girder inner plate forms a hollow cavity, the rear girder inner plate is divided into a rear girder front inner plate and a rear girder reinforcing plate which are fixedly connected, and the rear girder is divided into a rear girder front section and a rear girder connecting piece which is fixedly connected with the rear girder front section. The beneficial effects of the invention are as follows: the floor surface is lowered due to the built-in frame girder, so that the passenger cabin space is increased; the rear girder inner plate and the rear girder molded surface are relatively simple, are easy to mold, are sealed cavities after welding, and are not easy to rebound; the molding difficulty is reduced again through part blocking, and the mold development is facilitated.

Description

Rear floor structure for increasing passenger cabin space

Technical Field

The invention relates to an automobile part structure, in particular to a rear floor structure for increasing the space of a passenger cabin.

Background

The passenger cabin space is an important consideration when a consumer purchases the vehicle, and the passenger cabin space is increased, so that the riding comfort of the passenger can be improved. MPV (passenger space, car comfort and van functions are integrated, generally two-compartment structure, namely utility vehicle) has a complete and wide passenger cabin space, the current common MPV rear floor structure is shown in figure 1, the rear floor is designed to be relatively flat, the left and right rear girders are welded below the floor, the oil tank and the rear suspension are arranged below the girders, and the middle and rear rows of seat mounting points on the floor are basically in a horizontal plane.

This structure has several drawbacks:

(1) The rear girder is welded below the floor, so that the floor surface is lifted, and the passenger cabin space is reduced when the whole vehicle height is fixed; when the space is ensured, the whole vehicle height is increased;

(2) The rear floor is relatively flat, chassis parts such as an oil tank, a rear suspension and the like need to avoid the whole floor surface, so that the chassis is lifted up, the passenger cabin space is compressed or the vehicle body height is raised;

(3) The Z-direction height difference of mounting points of the middle-row seats and the rear-row seats is small, the comfort level of the rear-row seats is poor, the vehicle body or the heightening seats are required to be lengthened in order to improve the comfort level of the rear-row seats, and the heightening seats reduce the head space and increase the seat cost;

(4) The rear floor is a large flat plate, has large size, low rigidity and high requirement on the die, and has thinner plate thickness and easy deformation in the transportation process.

(5) The left and right rear girders have larger Z-direction dimension, the molded surface of the part is complex, and the stamping process is easy to crack and wrinkle.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a rear floor structure for increasing the space of a passenger cabin.

The invention comprises an automobile frame and a rear floor assembly, wherein the automobile frame consists of a rear girder assembly and a rear cross beam at the left side and the right side of an automobile, the rear floor assembly is provided with a bulge at the joint of the automobile frame, and the automobile frame is arranged in the bulge.

The invention is further improved, the rear girder assembly comprises a rear girder and a rear girder inner plate, and the rear girder inner plate form a hollow cavity.

The invention is further improved, and the rear girder inner plate is fixed above the rear girder.

The invention is further improved, the rear girder inner plate comprises a rear girder front inner plate and a rear girder reinforcing plate which are fixedly connected, and the rear girder reinforcing plate is arranged close to the tail of the vehicle.

The invention is further improved, the rear girder comprises a rear girder front section and a rear girder connecting piece fixedly connected with the rear girder front section, and the rear girder connecting piece is fixedly connected with the rear girder reinforcing plate.

The invention is further improved, the rear floor assembly comprises a rear seat lower plate and a spare tire cabin structure, and the rear seat lower plate and the spare tire cabin structure are fixedly connected at the rear cross beam.

According to the invention, a rear floor beam connecting piece is arranged above the rear beam, and is arranged above the joint of the rear seat lower plate and the spare tire cabin structure, fixedly connected with the rear beam and forms a cavity with the rear beam.

According to the invention, the height difference is arranged between the bottom plate surface of the middle-row seat and the bottom plate surface of the rear-row seat, the rear-row seat is arranged on the rear floor beam connecting piece, and the middle-row seat and the rear-row seat are arranged in a ladder shape.

According to the invention, the lower plate of the rear seat is provided with a boss avoiding an oil tank, a first sinking platform avoiding the seat and a second sinking platform avoiding an antenna.

According to the invention, the spare tire cabin structure is further improved, the spare tire cabin is arranged on one side of the automobile, and a platform for avoiding the exhaust pipe is arranged on the corresponding position of the exhaust pipe assembly on the other side of the automobile.

Compared with the prior art, the invention has the beneficial effects that: the floor surface is lowered due to the built-in frame girder, so that the passenger cabin space is increased; the rear girder inner plate and the rear girder molded surface are relatively simple, are easy to mold, are sealed cavities after welding, and are not easy to rebound; the molding difficulty is reduced again through part blocking, and the mold development is facilitated; the multi-step structure of the lower plate of the rear seat and the spare tire cabin increases the Z-direction relative space of the passenger cabin by 50 mm; the installation design of the low-frequency antenna enables the carpet to be tiled, improves the perceived quality, and does not affect the foot placing space of third-row passengers; the installation design of the spare tire meets the requirement of the installation of the third row of seats when the height of the vehicle body is unchanged, and simultaneously increases the space of the trunk; the seat ladder-shaped arrangement increases the Z-direction leg space of 100mm for the third row passengers; compared with the existing MPV, the overall vehicle height is reduced by 150-200mm, the ground grabbing capacity of the tire is improved, meanwhile, wind resistance can be reduced, and oil consumption is reduced; the sizes of the lower plate of the rear seat and the spare tire cabin are only half of that of the rear floor, parts are easy to form, the die maintenance cost is low, the rigidity is superior to that of the flat rear floor, and the parts are not easy to deform.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a schematic view of a rear girder assembly;

FIG. 4 is an enlarged cross-sectional view of the dashed box of FIG. 3;

FIG. 5 is a schematic view of the rear cross member inner plate structure;

FIG. 6 is a schematic view of an exploded structure of the rear cross member inner plate;

FIG. 7 is a schematic view of the rear cross member structure;

FIG. 8 is a schematic view of an exploded rear cross member;

FIG. 9 is a schematic view of a rear seat bottom panel structure;

fig. 10 is a schematic view of a spare tire compartment structure.

Detailed Description

The invention will be described in further detail with reference to the drawings and examples.

As shown in fig. 2, the invention comprises an automobile frame and a rear floor assembly 3, wherein the automobile frame consists of a rear girder assembly 1 and a rear cross beam on the left side and the right side of an automobile, a bulge is arranged at the joint of the automobile frame of the rear floor assembly 3, and the automobile frame is arranged in the bulge. In the embodiment, the floor surface of the rear floor assembly 3 is lowered by 46mm through the built-in automobile frame, so that the passenger cabin space is increased; the invention realizes the optimal design of the passenger cabin space while controlling the whole vehicle height to be at a certain vehicle height.

As shown in fig. 3 and 4, the rear girder assembly 1 of the present example includes a rear girder 11 and a rear girder inner plate 12, wherein the rear girder 11 and the rear girder inner plate 12 form a hollow cavity, and the rear girder inner plate 12 is welded above the rear girder 11. The invention is characterized in that a rear girder assembly 1 is internally arranged and is divided into a rear girder inner plate 12 and a rear girder 11, namely an upper part and a lower part, so as to form a closed hollow cavity; the bearing capacity of the whole vehicle is improved, and the bearing capacity can bear larger acting force when the whole vehicle is impacted.

As shown in fig. 5 to 8, this example divides the rear girder inner plate 12 into two parts, a rear girder front inner plate 121 and a rear girder reinforcing plate 122, and the rear girder reinforcing plate 122 is provided near the vehicle tail. The rear girder 11 is divided into a rear girder front section 111 and a rear girder connecting piece 112 fixedly connected with the rear girder front section 111, and the rear girder connecting piece 112 is fixedly connected with a rear girder reinforcing plate 122. The molded surfaces of the rear girder inner plate 12 and the rear girder 11 are relatively simple, the molding is easy, a closed cavity is formed after welding, and rebound is not easy; the molding difficulty is reduced again through part blocking, and the mold development is facilitated. In this example, since the rear girder connecting piece 112 is an insensitive section, a 1.4mm sheet (the girder part of other automobile frames is 1.6 mm) is adopted, and longitudinal ribs are designed. The thickness of the rear girder connecting piece 112 is reduced, the weight is reduced by 0.15kg, and the rear collision requirement is met by adding the energy-absorbing longitudinal ribs.

As shown in fig. 9 and 10, the rear floor assembly 3 of this example is divided into two parts, namely a rear seat lower plate 31 and a spare tire cabin structure 32, which are both in a multi-step structure, and the rear seat lower plate 31 and the spare tire cabin structure 32 are fixedly connected at the rear cross member. In addition, a rear floor beam connecting piece 2 is arranged above the rear beam in this example, and the rear floor beam connecting piece 2 is arranged above the joint of the rear seat lower plate 31 and the spare tire cabin structure 32, is fixedly connected with the rear beam, and forms a cavity with the rear beam. Thereby improving the bearing capacity of the cross beam, and finally achieving the purposes of improving the strength and the rigidity and improving the torsional rigidity of the whole vehicle. The sizes of the rear seat lower plate 31 and the spare tire cabin structure 32 are only half of that of the rear floor assembly 3, parts are easy to form, the die maintenance cost is low, the rigidity is superior to that of a flat rear floor, the parts are not easy to deform, and the problems of poor rigidity and easy deformation of the rear floor in the prior art are effectively solved.

The middle row seat mounting point 311 of this example is provided on the rear seat lower plate 31, and the rear row seat mounting point 4 is shown to be provided on the rear floor cross member connector 2 and the rear girder assembly 1, respectively, and the bottom plate surface of the middle row seat and the bottom plate surface of the rear row seat are provided with 100mm height difference, and the front mounting point of the rear row seat is provided with the rear floor cross member connector 2, so that the mounting strength is further increased, and the middle row seat and the rear row seat are arranged in a ladder shape, so that the Z-direction leg space of 100mm is increased for the third row passengers.

The rear seat lower plate 31 is provided with a boss 312 for avoiding an oil tank, a first sinking platform 313 for avoiding a seat and a second sinking platform 314 for avoiding an antenna, the spare tire cabin structure 32 is provided with a spare tire cabin 321, the spare tire cabin 321 is arranged on one side of an automobile, and the spare tire cabin structure 32 is provided with a platform 322 for avoiding an exhaust pipe at a position corresponding to an exhaust pipe assembly on the other side of the automobile.

The multi-step configuration of the rear seat lower plate 31 and the spare tire compartment structure 32 of this example increases the Z-direction relative space of the passenger compartment by 50 mm. The lower plate 31 of the rear seat lowers the floor surface through the alternate structure of the boss 312 and the first sinking platform 313, and ensures the installation of the oil tank and the seat; the inclined plane designs the second and sinks the platform, satisfies the installation of low frequency antenna, and high and the rib highly uniform behind the low frequency antenna installation, makes the carpet can tiling, has promoted perception quality, does not also influence third row passenger's foot space simultaneously. The spare tire cabin 321 of the embodiment is arranged on the right side, so that the spare tire cabin avoids and eliminates exhaust. The depth of the spare tire cabin 321 is 220mm, the spare tire is as high as the floor surface after being installed, and the installation design of the spare tire meets the requirement of the installation of the third row of seats when the height of the vehicle body is unchanged, and meanwhile, the space of the trunk is increased.

Through the arrangement of the invention, the height of the whole vehicle is reduced by 150-200mm compared with the prior MPV, the ground grabbing capacity of the tire is effectively improved, the wind resistance can be greatly reduced, the oil consumption is reduced, and meanwhile, the passenger cabin space optimization design is realized while the height of the whole vehicle is controlled to be at a certain vehicle height.

The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which includes but is not limited to the embodiments, and equivalent modifications according to the present invention are within the scope of the present invention.

Claims

1. The utility model provides an increase passenger cabin space's back floor structure, includes the automobile frame, the back floor assembly that comprise back girder assembly, the rear cross beam of the left and right sides of car, its characterized in that: the rear floor assembly is provided with a protruding portion at the joint of the automobile frame, the automobile frame is built-in the protruding portion, the rear girder assembly comprises a rear girder and a rear girder inner plate, the rear girder and the rear girder inner plate form a hollow cavity, the rear girder inner plate is fixed above the rear girder, the rear floor assembly comprises a rear seat lower plate and a spare tire cabin structure, the rear seat lower plate and the spare tire cabin structure are fixedly connected at the rear cross beam, a rear floor cross beam connecting piece is arranged above the rear cross beam, the rear floor cross beam connecting piece is arranged above the joint of the rear seat lower plate and the spare tire cabin structure, is fixedly connected with the rear cross beam and forms a cavity with the rear cross beam, and a boss avoiding an oil tank, a first sinking platform avoiding a seat and a second sinking platform avoiding an antenna are arranged on the rear seat lower plate.

2. The rear floor structure of claim 1, wherein: the rear girder inner plate comprises a rear girder front inner plate and a rear girder reinforcing plate which are fixedly connected, and the rear girder reinforcing plate is arranged close to the tail of the vehicle.

3. The rear floor structure of claim 2, wherein: the rear girder comprises a rear girder front section and a rear girder connecting piece fixedly connected with the rear girder front section, and the rear girder connecting piece is fixedly connected with the rear girder reinforcing plate.

4. The rear floor structure of claim 1, wherein: the middle-row seat bottom plate surface and the rear-row seat bottom plate surface are provided with height differences, the rear-row seat is installed on the rear floor beam connecting piece, and the middle-row seat and the rear-row seat are arranged in a ladder shape.

5. The rear floor structure of claim 1, wherein: the spare tire cabin structure is provided with a spare tire cabin, the spare tire cabin is arranged on one side of the automobile, and a platform for avoiding an exhaust pipe is arranged on the corresponding position of an exhaust pipe assembly on the other side of the automobile.