CN218505997U - Floor assembly and vehicle behind automobile body - Google Patents

Abstract

The utility model provides a vehicle body rear floor assembly and a vehicle, which comprises two longitudinal beams, a rear floor plate connected between the two longitudinal beams, a front cross beam, a front middle cross beam, a rear middle cross beam and a rear cross beam, wherein the front cross beam, the front middle cross beam, the rear middle cross beam and the rear cross beam are fixed on the rear floor plate at intervals along the longitudinal direction of the vehicle body; the front cross beam and the front middle cross beam are connected through at least one front vertical beam which is distributed at intervals along the transverse direction of the vehicle body, the rear middle cross beam and the front middle cross beam are connected through at least one middle vertical beam which is distributed at intervals along the transverse direction of the vehicle body, and a plurality of reinforcing vertical beams are distributed on the rear cross beam at intervals along the transverse direction of the vehicle body; wherein, preceding perpendicular roof beam is connected with the bottom surface laminating of back floor plate, and well perpendicular roof beam all is connected with the top surface laminating of back floor plate with strengthening perpendicular roof beam. The utility model provides a floor assembly behind automobile body can improve the structural strength of back floor assembly, reduces the vibration response sensitivity to promote the vehicle and take advantage of the travelling comfort.

Description

Floor assembly and vehicle behind automobile body

Technical Field

The utility model belongs to the technical field of vehicle body structure, concretely relates to floor assembly and vehicle behind automobile body.

Background

The rear floor of the vehicle body is located at the rear part of the whole vehicle body, the physical index is located at a position with large first-order bending energy response of the floor, the position bears the excitation vibration energy of the whole rear suspension, the vibration sensitivity of the position is usually high, the excitation energy of tires of the rear suspension and the excitation energy of a rear motor reducer can cause the vibration of the rear floor, and the riding experience of the vehicle is directly influenced along with the problem of vibration noise.

Along with the continuous improvement of the requirement of a user on the comfort of a vehicle, the design of the rear part of the vehicle body floor is more and more important, how to reduce the response of the rear floor of the vehicle body to vibration noise and how to improve the attenuation of the rear floor of the vehicle body to vibration and noise energy are important indexes for NVH research. At present, most vehicles can not solve the problem of high vibration response sensitivity from a rear floor structure, but the overall strength of the rear floor is improved by directly reinforcing the thickness of a sheet metal structure of a rear floor framework and increasing the thickness of a rear floor plate, and although the mode can inhibit vibration, the weight of a vehicle body is directly increased, and the vehicle body is not beneficial to light weight of the vehicle body.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a floor assembly and vehicle behind automobile body aims at improving the structural strength of back floor assembly under the prerequisite that satisfies automobile body lightweight designing requirement to reduce the vibration response sensitivity of back floor assembly, thereby promote the vehicle and take advantage of the travelling comfort.

In order to achieve the above object, the utility model adopts the following technical scheme: the first aspect provides a floor assembly behind automobile body, includes two longerons and connects the back floor plate between two longerons, still includes and is fixed in a plurality of web members on the back floor plate along the vertical interval of automobile body, and each web member's both ends are connected with two longerons respectively, and it has many to strengthen perpendicular roof beams to distribute along the horizontal interval of automobile body on one of them web member, and each is strengthened the structure and/or the size mutually different of perpendicular roof beam, and each is strengthened perpendicular roof beam all with back floor plate fixed connection.

In some embodiments, each reinforcing beam is a front beam, a front middle beam, a rear middle beam and a rear beam in sequence from front to rear; the front cross beam and the front middle cross beam are connected through at least one front vertical beam which is distributed along the transverse direction of the vehicle body at intervals, and the rear middle cross beam and the front middle cross beam are connected through at least one middle vertical beam which is distributed along the transverse direction of the vehicle body at intervals; a plurality of reinforcing vertical beams are uniformly distributed on the rear cross beam.

With reference to the first aspect, in one possible implementation manner, the cross section of the front cross beam is a closed polygonal structure; the front middle cross beam comprises a first half beam and a second half beam, and the mouths of the first half beam and the second half beam face opposite directions and are combined into an S-shaped structure in a vertically staggered mode; the middle part of the rear middle cross beam is arched towards the front middle cross beam, and the middle part of the rear cross beam is arched downwards.

In some embodiments, the first half beam and the upper panel of the rear floor panel define a first closed cavity, and the second half beam and the lower panel of the rear floor panel define a first closed cavity;

wherein, the front side edge of first half roof beam overlaps with the rear side edge of second half roof beam, and has the clearance between the two, and back floor board spare passes the clearance between first half roof beam and the second half roof beam and with both fixed connection.

Illustratively, the rear middle cross beam comprises two half channel beams which are respectively fastened and fixed on the upper and lower plate surfaces of the rear floor plate, and the two half channel beams are aligned up and down and respectively enclose a closed second closed cavity with the upper and lower plate surfaces of the rear floor plate; one end of the front vertical beam is fixedly connected with the front cross beam, and the other end of the front vertical beam is fixedly connected with the second half beam; one end of the middle vertical beam is fixedly connected with the first half beam, and the other end of the middle vertical beam is fixedly connected with the half slot beam positioned above the rear floor plate.

For example, the half-trough beam comprises a middle straight section and two end inclined sections fixedly connected with two ends of the middle straight section respectively, and the two end inclined sections are inclined towards the rear cross beam and fixedly connected with the two longitudinal beams respectively; wherein, the width of the end part inclined section is gradually increased from the middle straight section to the longitudinal beam connected with the end part inclined section.

With reference to the first aspect, in one possible implementation manner, the rear floor panel comprises a straight section, an upper arched section and a concave section which are sequentially distributed from front to back along the longitudinal direction of the vehicle body; the vertical sizes of the straight section, the upper arch section and the concave section are different; the front cross beam is fixedly connected with the front end of the straight section, the front middle cross beam is fixedly connected with the transition positions of the straight section and the upper arch section, the rear middle cross beam is fixedly connected with the transition positions of the upper arch section and the concave section, and the rear cross beam is fixedly connected with the middle part of the concave section.

Illustratively, a plurality of convex or concave first reinforcing areas are arranged at the transition positions of the straight section and the upper arch section and the transition positions of the upper arch section and the concave section.

For example, a plurality of convex or concave second reinforcing areas are sequentially distributed on the rear floor panel along the longitudinal direction of the vehicle body, and each second reinforcing area is asymmetrically distributed along the longitudinal central axis of the rear floor panel.

The utility model provides a floor assembly's beneficial effect lies in behind automobile body: compared with the prior art, the utility model discloses vehicle body rear floor assembly utilizes many web beam and two longerons to be connected with back floor plate in the lump, and arrange a plurality of enhancement vertical beams on one of them web beam, can promote overall structure intensity, because the structure and/or the size of each enhancement vertical beam are different, can realize the structural strength difference on the different positions when guaranteeing overall structure intensity promotion, thereby make different positions different and realize avoiding frequently the design to vibration frequency's response scope, and then avoid the resonance problem, reduce back floor assembly to vibration response's sensitivity, improve the comfort level that the vehicle takes advantage of.

The second aspect, the embodiment of the utility model provides a still provides a vehicle, including floor assembly behind above-mentioned automobile body, have the same beneficial effect with floor assembly behind above-mentioned automobile body, no longer describe herein.

Drawings

Fig. 1 is a schematic bottom view of a vehicle body rear floor assembly according to an embodiment of the present invention;

fig. 2 is a schematic top view of a floor assembly behind a vehicle body according to an embodiment of the present invention;

fig. 3 is a schematic bottom view of the rear floor assembly of the vehicle body according to the embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural view of a rear floor assembly of a vehicle body provided by an embodiment of the present invention along a longitudinal direction of the vehicle body;

FIG. 5 is an enlarged view of a portion of the structure shown at A in FIG. 4;

FIG. 6 is a schematic view of a portion of the enlarged structure at B in FIG. 4;

FIG. 7 is an enlarged partial view of the structure at C in FIG. 4;

fig. 8 is a schematic perspective view of a rear floor panel according to an embodiment of the present invention;

fig. 9 is a schematic longitudinal cutting structure diagram of a rear floor panel according to an embodiment of the present invention.

In the figure: 10. a stringer; 20. a rear floor panel; 21. a straight section; 210. a first region; 211. a first reinforcing structure; 212. a second region; 213. a third region; 214. a second reinforcing structure; 22. an upper arch section; 221. a fourth region; 222. a fifth region; 223. a sixth region; 224. a fourth reinforcing structure; 225. lightening holes; 23. a recessed section; 230. a concave cavity; 231. a seventh region; 232. a sixth reinforcing structure; 233. an eighth region; 234. a seventh reinforcing structure; 24. a first reinforced area; 25. a second reinforced area; 26. a first transition section; 261. a third reinforcing structure; 27. a second transition section; 271. a fifth reinforcing structure; 30. a front cross member; 40. a front middle cross beam; 400. a first closed cavity; 41. a first half-beam; 42. a second half-beam; 50. a rear middle cross beam; 500. a second closed chamber; 51. a half-channel beam; 511. a middle straight section; 512. an end inclined section; 60. a rear cross member; 70. a front vertical beam; 80. a middle vertical beam; 90. the vertical beams are reinforced.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and are therefore not to be considered limiting. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or several of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more unless specifically defined otherwise.

It should be understood that, in the following description, the vehicle body longitudinal direction refers to the front-rear length direction of the vehicle, the vehicle body lateral direction refers to the left-right width direction of the vehicle, and the up-down direction refers to the height direction of the vehicle.

Referring to fig. 1 to 9 together, a rear floor assembly of a vehicle body according to the present invention will now be described. The automobile body rear floor assembly comprises two longitudinal beams 10 and a rear floor plate 20 connected between the two longitudinal beams 10, and further comprises a plurality of reinforcing cross beams fixed on the rear floor plate 20 at intervals along the longitudinal direction of an automobile body, two ends of each reinforcing cross beam are respectively connected with the two longitudinal beams 10, a plurality of reinforcing vertical beams 90 are distributed on one reinforcing cross beam along the transverse interval of the automobile body, the structure and/or the size of each reinforcing vertical beam 90 are different from each other, and each reinforcing vertical beam 90 is fixedly connected with the rear floor plate 20.

The floor assembly behind automobile body that this embodiment provided, compared with the prior art, utilize many web beam and two longerons 10 and back floor plate 20 to be connected in the lump, and arrange a plurality of reinforcements on one of them web beam and erect roof beam 90, can promote overall structure intensity, because each reinforcement erects roof beam 90's structure and/or size mutually different, consequently, can be when guaranteeing overall structure intensity promotion, realize the structural strength difference in the different positions, thereby make different positions different and realize avoiding frequently the design to vibration frequency's response range difference, and then avoid the resonance problem, reduce the sensitivity of back floor assembly to vibration response, improve the vehicle and take advantage of the comfort level.

Specifically, in the present embodiment, each reinforcing beam is a front beam 30, a front middle beam 40, a rear middle beam 50, and a rear beam 60 in this order from front to rear; the front cross member 30 and the front middle cross member 40 are connected through at least one front vertical beam 70 which is distributed at intervals along the transverse direction of the vehicle body, and the rear middle cross member 50 and the front middle cross member 40 are connected through at least one middle vertical beam 80 which is distributed at intervals along the transverse direction of the vehicle body; each reinforcing vertical beam 90 is distributed on the rear cross member 60.

The front cross beam 30 is connected with the front ends of the two longitudinal beams 10, the rear cross beam 60 is connected with the rear ends of the two longitudinal beams 10 or positions close to the rear ends of the two longitudinal beams, and the rear floor panel 20 is divided into three continuous sections through the front middle cross beam 40 and the rear middle cross beam 50, so that a reinforcing structure is conveniently designed for each section of the area respectively to realize structural strength difference at different positions, frequency avoidance is realized through structural strength difference, and the resonance problem is avoided.

Preferably, in this embodiment, the front vertical beams 70, the middle vertical beams 80, and the reinforcing vertical beams 90 are distributed along the vehicle body in a laterally staggered manner, specifically, two front vertical beams 70 and two middle vertical beams 80 are preferably adopted, here, the front middle cross beam 40 is taken as a reference, the two front vertical beams 70 are respectively connected with the left and right sides of the front middle cross beam 40 at one third position, and the two middle vertical beams 80 are respectively connected with the left and right sides of the front middle cross beam 40 at one quarter position; the reinforcing vertical beam 90 is provided with three pieces, one of which is located in the middle of the reinforcing vertical beam 90.

Further, both ends of at least one reinforcing vertical beam 90 extend to both sides of the rear cross member 60 in the longitudinal direction of the vehicle body, respectively. Strengthen the both ends that erect roof beam 90 and extend to the both sides of rear frame member 60 and can form the cross structure, compare in the T type structure that only one end extends to rear frame member 60 side, the cross structure is connected fixed reliability and intensity with the relevant position of rear floor plate 20 and is higher, consequently, each is strengthened erecting roof beam 90 and is adopted different structure and hookup location, lie in the installation overall arrangement who adapts to all around spare on the one hand, on the other hand lies in realizing that rear floor plate 20 is close to the horizontal both sides structural strength differentiation in rear end region, thereby make the vibration response frequency difference of this regional horizontal both sides, can realize avoiding frequently actually in order to reduce vibration response sensitivity.

It should be noted that, as a preferable connection mode of the present embodiment, the front vertical beam 70 is in abutting connection with the bottom surface of the rear floor panel 20, and both the middle vertical beam 80 and the reinforcing vertical beam 90 are in abutting connection with the top surface of the rear floor panel 20.

The front vertical beam 70 and the middle vertical beam 80 are respectively connected to the bottom surface and the top surface of the rear floor panel 20, so that not only can direct transmission of vibration between different regions be avoided, but also structural strength differentiation between different regions is facilitated, and therefore frequency avoidance design is realized by realizing frequency avoidance design due to different vibration frequencies responded by different regions.

In some embodiments, referring to fig. 4 and 5, the cross section of the front cross member 30 is a closed polygonal structure, the front cross member 40 includes a first half beam 41 and a second half beam 42, and the mouths of the first half beam 41 and the second half beam 42 face to each other and are combined into an S-shaped structure by being shifted up and down; the middle of the rear center cross member 50 is curved toward the front center cross member 40, and the middle of the rear cross member 60 is curved downward.

The front cross beam 30 serves as a front end strength reinforcing member of the whole rear floor assembly, a polygonal structure closed cavity structure is adopted, specifically, two groove-shaped beams are welded in a buckling mode to form a closed cavity, the cross section size of the cavity is 90mm in the longitudinal direction of a vehicle body, the height direction of the vehicle body is 120mm, the structural strength of the front cross beam 30 is enhanced by the aid of the characteristic that the strength of the closed cavity is high, and vibration response sensitivity is reduced.

Further, an arched concave structure may be designed on the bottom wall of the middle area of the front cross member 30, and specifically, the structure may be a structure extending in the lateral direction of the vehicle body and being at least one step, by which the structural strength of the middle weak area of the front cross member 30 can be improved, and the vibration response sensitivity can be reduced. In the present embodiment, referring to fig. 1 to fig. 4 and fig. 6, the first half beam 41 and the upper plate surface of the rear floor panel 20 enclose a first closed cavity 400, and the second half beam 42 and the lower plate surface of the rear floor panel 20 enclose a first closed cavity 400; wherein the front side edge of the first half beam 41 overlaps the rear side edge of the second half beam 42 with a gap therebetween, and the rear floor panel 20 passes through the gap between the first half beam 41 and the second half beam 42 and is fixedly connected thereto.

Because the first half beam 41 and the second half beam 42 form an S-shaped cross section structure, the overlapped side edges of the first half beam 41 and the second half beam 42 are used for clamping the corresponding part of the rear floor panel 20 and welding and fixing the same, so as to form a connection mode that the rear floor panel 20 penetrates through the front middle cross beam 40, which is not only beneficial to improving the overall structural strength, but also can increase the connection width between the front middle cross beam 40 and the rear floor panel 20 to the size equivalent to the width of the two first half beams 41, which can actually reach 340mm, so that the structural strength can be further improved, on the basis, because the first half beam 41 and the second half beam 42 are respectively formed into a closed first closed cavity 400 with the rear floor panel 20, although the two first closed cavities 400 are respectively positioned on two sides of the rear floor panel 20, in fact, the two half beams are connected into a whole by using the S-shaped structural mode, the integrity is better compared with a mode that two closed box body structures are independently arranged for structural reinforcement, the structural strength is higher, and the vibration response sensitivity can be effectively reduced.

As an embodiment of the rear middle cross member 50, please refer to fig. 1 to 4 and fig. 7, the rear middle cross member 50 includes two half channel beams 51 fastened and fixed on the upper and lower plate surfaces of the rear floor panel 20, respectively, and the two half channel beams 51 are aligned up and down and enclose a closed second closed cavity 500 with the upper and lower plate surfaces of the rear floor panel 20, respectively; one end of the front vertical beam 70 is fixedly connected with the front cross beam 30, and the other end is fixedly connected with the second half beam 42; one end of the middle vertical beam 80 is fixedly connected with the first half beam 41, and the other end is fixedly connected with the half channel beam 51 positioned above the rear floor panel member 20.

Specifically, referring to fig. 3, in the present embodiment, the half-channel beam 51 includes a middle straight section 511 and two end inclined sections 512 fixedly connected to two ends of the middle straight section 511, and the two end inclined sections 512 are both inclined toward the rear cross beam 60 and fixedly connected to the two longitudinal beams 10; the width of the end inclined section 512 gradually increases from the middle straight section 511 to the longitudinal beam 10 connected thereto.

The two end inclined sections 512 and the middle straight section 511 are combined to form an arch structure which is arched towards the front middle cross beam 40, so that the structural strength of the rear middle cross beam 50 is improved by utilizing the characteristic that the arch structure has higher strength, and meanwhile, the two end inclined sections 512 are horn-mouth-shaped structures which are closer to the end parts and have larger widths, so that the two end inclined sections can be connected with the two longitudinal beams 10 in a larger area, the strength of the whole structure can be improved, and the vibration response sensitivity is reduced.

In addition, in the present embodiment, the rear cross member 60 is configured to be fitted to and welded to the rear floor panel 20 in accordance with the structural shape of the rear floor panel 20. Specifically, the dimension of the rear cross member 60 in the longitudinal direction of the vehicle body may be set to about 100mm, and by arching downward at the middle thereof, the strength of the region in the height direction of the vehicle body can be improved by virtue of the characteristic of high strength of the arched structure, and at the same time, by welding and fixing the plurality of reinforcing vertical beams 90 spaced apart therefrom to the rear floor panel 20, the structural strength of the region in the longitudinal direction of the vehicle body can be increased, thereby reducing the vibration response sensitivity of the region.

It should be further noted that, in the present embodiment, the front cross member 30, the front center cross member 40, the rear center cross member 50, and the rear cross member 60 are different in size in the longitudinal direction of the vehicle body; the front vertical beam 70 and the middle vertical beam 80 are sheet metal parts with different thicknesses. The front cross beam 30 is of a closed cavity structure, the longitudinal upper dimension of the vehicle body is 90mm, the front middle cross beam 40 is of an S-shaped structure, the longitudinal upper dimension of the vehicle body is 340mm, the rear middle cross beam 50 is of a structure with the middle part arched towards the front middle cross beam 40, the longitudinal dimension of the vehicle body is designed to be 132mm, the rear cross beam 60 is of a structure with the middle part arched downwards, and the longitudinal dimension of the vehicle body is designed to be 100mm; the front vertical beam 70 adopts a 1.2mm metal plate, and the middle vertical beam 80 adopts a 1mm metal plate; so can guarantee the structural strength differentiation of back floor skeleton on different positions to realize the vibration of different positions response different frequencies, avoid resonance phenomenon, thereby promote overall structure's vibration response sensitivity.

In some possible implementations, as shown in fig. 8 and 9, the rear floor panel 20 includes a straight section 21, an upper arch section 22, and a depressed section 23, which are sequentially distributed from front to rear in the longitudinal direction of the vehicle body; the straight section 21, the upper arch section 22 and the concave section 23 have different sizes along the longitudinal direction of the vehicle body; wherein, the front beam 30 is fixedly connected with the front end of the straight section 21, the front middle beam 40 is fixedly connected with the transition positions of the straight section 21 and the upper arch section 22, the rear middle beam 50 is fixedly connected with the transition positions of the upper arch section 22 and the concave section 23, and the rear beam 60 is fixedly connected with the middle part of the concave section 23.

That is to say, back floor plate 20 wholly presents for syllogic domes, and this structure itself can greatly promote the overall structure intensity of back floor plate 20, strengthens to the intersegmental transition position and the tip that back floor plate 20 is weak relatively respectively through each crossbeam simultaneously to realize that the bulk strength of back floor assembly promotes, and then reduce the vibration response sensitivity.

It should be understood that in the present embodiment, a plurality of convex or concave first reinforcing regions 24 are provided at the transition position between the straight section 21 and the upper arch section 22 and at the transition position between the upper arch section 22 and the concave section 23. Specifically, the first reinforcing region 24 may have longitudinally extending ribs or grooves spaced apart from each other in the lateral direction of the vehicle body, and the ribs or grooves may extend to connect two regions on the front and rear sides thereof, so as to improve the structural strength at the transition position and the overall structural strength of the rear floor panel 20, thereby reducing the vibration response sensitivity.

It should be noted that, in this embodiment, a plurality of convex or concave second reinforcing areas 25 are sequentially distributed on the rear floor panel 20 along the longitudinal direction of the vehicle body, and each second reinforcing area 25 is asymmetrically distributed along the longitudinal central axis of the rear floor panel 20. Specifically, each second reinforcing region 25 is located on the straight section 21, the upper arch section 22 and the concave section 23, and reinforcing structures with different structures may be designed in each second reinforcing region 25, but the actual reinforcing structures may be pits, grooves, ribs, irregular grooves and the like according to the principle of structural strength difference of each second reinforcing region 25 and the principle of structural strength difference of each second reinforcing region 25 in the transverse direction of the vehicle body, and for the purpose of lightening the vehicle body structure, for a pit or rib structure with a certain area, lightening holes may be appropriately formed in the basic range without affecting the structural strength, and the lightening holes are preferably formed in the reinforcing structure near one side of the rear floor panel 20 to promote the structural strength difference between the two sides, so that the two sides have different responses to the vibration frequency to realize a frequency avoiding design, and promote the reduction of vibration response sensitivity while lightening.

Specifically, the longitudinal length of the floor panel member 20 will be described as 1770mm and the lateral width thereof as 940 mm.

In this embodiment, the straight section 21 has a longitudinal dimension of 550mm, the upper arch section 22 has a longitudinal dimension of 529mm, and the concave section 23 has a longitudinal dimension of 490mm, and further, the transition region between the straight section 21 and the upper arch section 22 (referred to herein as the first transition section 26) has a longitudinal dimension of 117mm, and the transition region between the concave section 23 and the upper arch section 22 (referred to herein as the second transition section 27) has a longitudinal dimension of 82mm.

The second reinforcing area 25 on the straight section 21 specifically includes two first areas 210, two second areas 212, and a third area 213; the two first areas 210 are symmetrically distributed on two sides of the straight section 21 along the longitudinal central axis of the straight section 21, wherein one of the first areas 210 is provided with a first reinforcing structure 211 which is convex or concave; the two second regions 212 are respectively arranged close to the front edge and the rear edge of the straight section 21, the second regions 212 extend along the transverse direction of the vehicle body, and two ends of the second regions are respectively connected with the two first regions 210; the third area 213 is located between the two first areas 210, and the front and rear ends are respectively connected with the two second areas 212, and a convex or concave second reinforcing structure 214 is arranged in the third area 213.

Specifically, the width of the first region 210 is 150mm, the length of the first region is 480mm, the depth of the first region is 20mm, the width of the first region is 150mm, the length of the first region is 96mm, the depth of the first region is 23mm, the two reinforcing structures are connected through a connecting structure with the length of 71mm and the width of 64mm, meanwhile, in order to achieve the frequency avoiding performance between the two first regions 210, a first reinforcing structure 211 can be optionally added in the first region 210 on one side of the two reinforcing structures, and the first reinforcing structure 211 can be a square bulge; the second area 212 can be respectively designed with reinforcing ribs with the width of 52mm, the length of 367mm and the length of 678mm and the depth of 20mm at the positions close to the front end and the rear end of the straight section 21; two lengths 361mm are designed in the third area 213, the width is 62mm, the depth is 20mm, the two reinforcing protrusions are respectively located at the position of one third of the front half part along the transverse direction of the vehicle body, the increased side length at the rear ends of the two reinforcing protrusions is 113mm, the depth is 20mm, meanwhile, a plurality of reinforcing pits are arranged between the two reinforcing protrusions along the transverse direction of the vehicle body at intervals, the width is 41mm, the length is 419mm, the depth is 23mm, and a second reinforcing structure 214 is arranged at the position of the middle of the third area 213 deviated to one side in the transverse direction, the second reinforcing structure 214 can be a triangular or trapezoidal pit or protrusion structure, on one hand, the structural strength of the middle weak position can be further enhanced, on the other hand, the structural strength difference of the left side and the right side of the vehicle body in the area can be guaranteed by using the triangular or trapezoidal asymmetrical structural characteristics, so that the vibration response frequencies of the two transverse sides of the third area 213 are different, the frequency avoiding design is realized, and the vibration response sensitivity is reduced.

The first reinforcing region 24 on the first transition section 26 comprises a plurality of convex or concave third reinforcing structures 261 which are distributed at intervals along the transverse direction of the vehicle body, and the front end and the rear end of each third reinforcing structure 261 are respectively connected with the second reinforcing regions 25 on the straight section 21 and the upper arch section 22.

Specifically, the upper arch section 22 is higher than the straight section 21, so that the first transition section 26 is in a state of being inclined and raised from front to back, the pit or rib structures on the front side and the back side of the first transition section 26 in the longitudinal direction can be in an S-shaped extending mode along the longitudinal direction of the vehicle body, the structural strength of the first transition section can be improved by utilizing the vertically staggered double-arch bending surfaces of the S-shaped structures, meanwhile, the first transition section 26 is provided with a plurality of third reinforcing structures 261, each third reinforcing structure 261 can be a strip-shaped pit extending in the longitudinal direction of the vehicle body, the width of each strip-shaped pit is 52mm, the length of each strip-shaped pit is 258mm, the depth of each strip-shaped pit is 20mm, and the two ends of each strip-shaped pit are respectively connected with the straight section 21 and the reinforcing areas on the concave section 23 in a staggered manner to form a whole, so that the structural strength of the first transition section 26 is improved, and the vibration response sensitivity is reduced.

The front end and the rear end of the upper arch section 22 in this embodiment are formed into a stepped structure of at least one step in the middle of the upper arch section 22. Specifically, the step structure formed by the rear end of the upper arch section 22 to the middle position of the upper arch section 22 is a three-step. The front end and the rear end of the upper arch section 22 are of a step structure, so that the structural strength of the upper arch section 22, particularly in the height direction of a vehicle body, can be improved, and the vibration response sensitivity is reduced.

In the present embodiment, the second reinforcing region 25 on the upper arch section 22 includes a fourth region 221, a fifth region 222, and a sixth region 223; the fourth area 221 is arranged on the step structure close to the straight section 21, and the fourth area 221 protrudes upwards from one step of the step structure to form an arch cavity; the fifth area 222 is arranged on the step structure close to the concave section 23, and the fifth area 222 extends along the transverse direction of the vehicle body to form a strip shape; the sixth region 223 is located between the fifth region 222 and the fourth region 221, and the sixth region 223 includes a plurality of groups of fourth reinforcing structures 224 that are distributed in the lateral direction of the vehicle body in sequence and have different shapes.

Specifically, the fourth region 221 is designed with an arch cavity protruding upwards, so that the region is in an arch structure in the transverse direction of the vehicle body, and the structural strength is improved; a strip-shaped concave pit extending along the transverse direction of the vehicle body is designed on the fifth area 222 and the first-stage step surface, and the specific size is 672mm in length and 30mm in width; on the basis, a plurality of groups of different fourth reinforcing structures 224 are designed in a sixth area 223 located between the fourth area 221 and the fifth area 222, one of the four reinforcing structures is two double-T-shaped reinforcing ribs designed close to one side of the transverse direction of the upper arch section 22, the two double-T-shaped reinforcing ribs are opposite along the transverse direction of the vehicle body, the other one of the four reinforcing structures is a square pit designed close to the other side of the transverse direction of the upper arch section 22, and a square lightening hole 225 is formed in the square pit.

In this embodiment, the first reinforcing region 24 on the second transition section 27 includes a plurality of convex or concave fifth reinforcing structures 271 distributed at intervals along the transverse direction of the vehicle body, each fifth reinforcing structure 271 extends along the longitudinal direction of the vehicle body, and the extending lengths of the fifth reinforcing structures 271 are different; wherein at least part of the fifth reinforcing structure 271 passes through the fifth region 222 and connects with the sixth region 223. The fifth reinforcing structures 271 may be provided in six strips, each having a length of 159mm, 415mm, 435mm, 421mm, 220mm, 260mm in the longitudinal direction of the vehicle body, and a depth of 20mm, wherein two or three longer strips intersect the fifth region 222 and are connected to the reinforcing structures in the sixth region 223; by arranging the fifth enhancement structures 271 with different lengths, the structural strength difference at different positions on the second transition section 27 can be realized, the frequency avoiding effect is further improved, and the vibration response sensitivity is reduced.

In the present embodiment, the second reinforcing region 25 on the recessed section 23 includes a seventh region 231 and an eighth region 233; wherein the seventh region 231 includes a plurality of sixth reinforcing structures 232 distributed at intervals in the lateral direction of the vehicle body, and the sixth reinforcing structures 232 extend in the longitudinal direction of the vehicle body; the eighth area 233 is located at the bottom of the concave cavity 230, the eighth area 233 is arranged along the transverse direction of the vehicle body, and a seventh reinforcing structure 234 which is convex or concave is arranged in the eighth area 233.

Specifically, the recessed depth of the cavity 230 is designed to be 100mm, wherein the front end of the cavity 230 is formed into an arch shape with the height-to-width ratio of 0.19, the rear end of the cavity 230 is designed into an arch shape with the height-to-width ratio of 0.05, the overall structural strength is improved through the arch structures, and on the basis of the arch structures, in order to further improve the structural strength, a plurality of sixth reinforcing structures 232 extending along the longitudinal direction of the vehicle body are designed in a seventh area 231, wherein the sixth reinforcing structures 232 can be reinforcing ribs with the width of 55mm and the depth of 20mm, and the length of the reinforcing ribs occupies two thirds of the length of the cavity 230 along the longitudinal direction of the vehicle body; the seventh reinforcing structures 234 designed in the eighth region 233 may be S-shaped reinforcing ribs or grooves with a protrusion height of 15mm, which utilize the characteristic of S-shaped structural strength to improve the structural strength of the weak portion of the concave section 23, and simultaneously improve the longitudinal structural strength of the concave section 23 by means of the plurality of sixth reinforcing structures 232, thereby reducing the sensitivity of vibration response.

Based on the same inventive concept, as shown in fig. 1 to 9, embodiments of the present application further provide a vehicle including the above rear floor assembly.

Compared with the prior art, the vehicle provided by the embodiment adopts the vehicle rear floor assembly, so that the strength of the whole structure can be improved, the resonance problem can be avoided by utilizing the strength difference of different areas, the sensitivity of the rear floor assembly to vibration response is reduced, and the comfort level of the vehicle is improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Floor assembly behind automobile body, including two longerons (10) and connect in two rear floor plate (20) between longeron (10), its characterized in that still includes and is fixed in along the vertical interval of automobile body a plurality of web beam on rear floor plate (20), each web beam's both ends respectively with two longeron (10) are connected, one of them web beam goes up and has many to strengthen perpendicular roof beam (90), each along the horizontal interval distribution of automobile body the structure and/or the size of strengthening perpendicular roof beam (90) are mutually different, each strengthen perpendicular roof beam (90) all with rear floor plate (20) fixed connection.

2. The vehicle rear floor assembly according to claim 1, wherein each of the reinforcing cross members is a front cross member (30), a front center cross member (40), a rear center cross member (50), and a rear cross member (60) in this order from front to rear; the front cross beam (30) and the front middle cross beam (40) are connected through at least one front vertical beam (70) distributed at intervals along the transverse direction of the vehicle body, and the rear middle cross beam (50) and the front middle cross beam (40) are connected through at least one middle vertical beam (80) distributed at intervals along the transverse direction of the vehicle body; the plurality of reinforcing vertical beams (90) are uniformly distributed on the rear cross beam (60).

3. The floor assembly of claim 2, characterized in that the cross section of the front cross member (30) is a closed polygonal structure, the front center cross member (40) comprises a first half beam (41) and a second half beam (42), the mouths of the first half beam (41) and the second half beam (42) face opposite directions and are staggered up and down with each other to form an S-shaped structure, the middle of the rear center cross member (50) is arched towards the front center cross member (40), and the middle of the rear cross member (60) is arched downwards.

4. The vehicle rear floor assembly according to claim 3, wherein said first half beam (41) and an upper panel of said rear floor panel (20) define a first closed cavity (400), and said second half beam (42) and a lower panel of said rear floor panel (20) define a first closed cavity (400);

wherein the front side edge of the first half beam (41) is overlapped with the rear side edge of the second half beam (42) with a gap therebetween, and the rear floor panel (20) passes through the gap between the first half beam (41) and the second half beam (42) and is fixedly connected with the first half beam and the second half beam.

5. The vehicle rear floor assembly according to claim 4, wherein said rear center cross member (50) includes two half channel members (51) fastened to the upper and lower plate surfaces of said rear floor panel (20), respectively, said two half channel members (51) being aligned up and down and enclosing a closed second closed chamber (500) with the upper and lower plate surfaces of said rear floor panel (20), respectively; one end of the front vertical beam (70) is fixedly connected with the front cross beam (30), and the other end of the front vertical beam is fixedly connected with the second half beam (42); one end of the middle vertical beam (80) is fixedly connected with the first half beam (41), and the other end of the middle vertical beam is fixedly connected with the half channel beam (51) positioned above the rear floor plate (20).

6. The floor assembly behind the vehicle body according to claim 5, characterized in that said half channel beam (51) comprises a middle straight section (511) and two end inclined sections (512) fixedly connected to the two ends of said middle straight section (511), respectively, both of said end inclined sections (512) being inclined toward said rear cross member (60) and fixedly connected to the two side members (10), respectively; wherein the width of the end inclined section (512) is gradually increased from the middle straight section (511) to the longitudinal beam (10) connected with the middle straight section.

7. The vehicle body rear floor assembly according to claim 2, wherein the rear floor panel (20) includes a straight section (21), an upper arch section (22), and a depressed section (23) which are sequentially distributed from front to rear in the longitudinal direction of the vehicle body; the straight section (21), the upper arch section (22) and the concave section (23) have different longitudinal sizes; the front cross beam (30) is fixedly connected with the front end of the flat section (21), the front middle cross beam (40) is fixedly connected with the transition positions of the flat section (21) and the upper arch section (22), the rear middle cross beam (50) is fixedly connected with the transition positions of the upper arch section (22) and the concave section (23), and the rear cross beam (60) is fixedly connected with the middle of the concave section (23).

8. The vehicle rear floor assembly according to claim 7, wherein a plurality of first reinforcement areas (24) which are convex or concave are provided at the transition position of the straight section (21) and the upper arch section (22) and at the transition position of the upper arch section (22) and the concave section (23).

9. The vehicle rear floor assembly according to any one of claims 1 to 8, wherein a plurality of convex or concave second reinforcing regions (25) are sequentially distributed on the rear floor panel (20) along the longitudinal direction of the vehicle body, and each second reinforcing region (25) is asymmetrically distributed along the longitudinal central axis of the rear floor panel (20).

10. Vehicle, characterized in that it comprises a rear floor assembly as claimed in any one of claims 1 to 9.

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