CN218536901U - Rear floor framework, rear floor assembly and vehicle - Google Patents

Abstract

The utility model provides a rear floor framework, a rear floor assembly and a vehicle, which comprises two side beams, a reinforcing cross beam, at least two front vertical beams and at least two middle vertical beams; the reinforcing cross beam comprises a front cross beam, a front middle cross beam, a rear middle cross beam and a rear cross beam which are sequentially distributed at intervals from front to back along the longitudinal direction of the vehicle body; each front vertical beam is distributed at intervals along the transverse direction of the vehicle body, one end of each front vertical beam is fixedly connected with the front cross beam, and the other end of each front vertical beam is fixedly connected with the front middle cross beam; each middle vertical beam is distributed at intervals along the transverse direction of the vehicle body, one end of each middle vertical beam is fixedly connected with the front middle cross beam, and the other end of each middle vertical beam is fixedly connected with the rear middle cross beam; the front cross beam is positioned at the front end of the boundary beam, and the rear cross beam is positioned between the rear middle cross beam and the rear end of the boundary beam. The utility model provides a back floor skeleton, back floor assembly and vehicle can follow the suppression effect of structural promotion back floor to vibration, noise energy, and then improves the vehicle and takes advantage of the travelling comfort.

Description

Rear floor framework, rear floor assembly and vehicle

Technical Field

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

Background

The rear floor is a part of the vehicle body floor close to the rear part and is positioned at the integral rear part of the vehicle body, the physical index is positioned at a position with larger first-order bending energy response of the floor, and the position not only bears the excitation vibration energy of the whole rear suspension but also has high sensitivity of vibration response. Wherein, the excitation energy of the rear suspension tire and the rear motor reducer can cause the vibration of the rear floor framework, thereby generating the vibration noise.

At present, the phenomenon of vibration and noise problems caused by insufficient structural strength of a rear floor assembly is a great problem in vehicle NVH research, and along with the continuous improvement of the requirement of a user on the comfort of a vehicle, the design of the rear floor assembly is more and more important, and the strength of a rear floor framework often determines the structural strength of the rear floor assembly, so that how to improve the structural strength of the rear floor framework, the effect of inhibiting vibration and noise by utilizing the structure of the rear floor framework is a key research direction for improving the comfort of a vehicle.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a back floor skeleton, back floor assembly and vehicle aims at promoting the structural strength of back floor skeleton, promotes the suppression effect to vibration, noise energy from back floor skeleton texture to improve the vehicle and take advantage of the travelling comfort.

In order to achieve the purpose, the utility model adopts the technical proposal that: in a first aspect, there is provided a rear floor frame comprising:

the two side beams are symmetrically distributed along the longitudinal direction of the vehicle body;

the two ends of the reinforcing cross beam are respectively fixedly connected with the two edge beams, and the reinforcing cross beam comprises a plurality of cross beams which are sequentially distributed at intervals from front to back along the longitudinal direction of the vehicle body;

and the plurality of vertical reinforcing beams are distributed on one cross beam at intervals along the transverse direction of the vehicle body, and the structures and/or the sizes of the vertical reinforcing beams are different from each other.

With reference to the first aspect, in one possible implementation manner, the plurality of cross beams are a front cross beam, a front middle cross beam, a rear middle cross beam and a rear cross beam in sequence from front to rear; wherein, be connected with at least one preceding perpendicular roof beam between front beam and the preceding intermediate transverse beam, be connected with at least one well perpendicular roof beam between preceding intermediate transverse beam and the back intermediate transverse beam, many strengthen perpendicular roof beams and distribute on the back beam.

In some embodiments, the front cross beam comprises two first channel beams which are connected into a whole in a buckling mode, and a first reinforcing structure is arranged in the middle of at least one first channel beam.

Illustratively, the first reinforcing structure is a dimple having at least one step, the dimple extending in the lateral direction of the vehicle body.

In some embodiments, the front center cross member includes a second slot beam having two notches oriented in opposite directions and staggered up and down to form an S-shape.

In some embodiments, the middle portion of the rear center cross member is curved toward the front center cross member, and the dimension of the rear center cross member in the longitudinal direction of the vehicle body gradually increases from the curved portion thereof toward both ends thereof.

For example, the rear middle cross beam comprises two third channel beams which are connected in a buckling manner up and down, and the middle part of at least one third channel beam is provided with a plurality of convex or concave second reinforcing structures.

In a possible implementation mode, the middle part of the rear cross beam is arched downwards, and the sizes of the front cross beam, the front middle cross beam, the rear middle cross beam and the rear cross beam along the longitudinal direction of the vehicle body are different; the front vertical beam and the middle vertical beam are sheet metal parts with different thicknesses.

The utility model provides a back floor skeleton's beneficial effect lies in: compared with the prior art, the utility model discloses back floor skeleton, the interval sets up many places crossbeam as additional strengthening on the extending direction of boundary beam, can improve back floor skeleton's structural strength on the whole, be favorable to reducing vibration response sensitivity, thereby the suppression vibration noise, on this basis, a plurality of structures and/or the mutually different enhancement vertical beams of size that distribute on one of them crossbeam, can be when improving joint strength between crossbeam and the back floor plate, form the intensity difference between the different positions of messenger back floor skeleton, thereby make each position different and realize keeping away the design frequently to the response range of vibration frequency, avoid the resonance between different positions, can further reduce the response sensitivity to the vibration, under the prerequisite that does not increase weight, can promote its vibration from back floor skeleton's structural, the suppression effect of noise energy, and then improve the vehicle and take advantage of the travelling comfort.

The second aspect, the embodiment of the utility model provides a back floor assembly is still provided, including above-mentioned back floor skeleton, have the same beneficial effect with above-mentioned back floor skeleton, no longer describe herein.

The third aspect, the embodiment of the utility model provides a vehicle is still provided, including the back floor assembly that has adopted above-mentioned back floor skeleton, consequently also have the same beneficial effect with above-mentioned back floor skeleton, no longer describe here.

Drawings

Fig. 1 is a schematic perspective view of a rear floor frame according to an embodiment of the present invention;

fig. 2 is a schematic view of a longitudinal section of the rear floor frame along the vehicle body according to an embodiment of the present invention.

In the figure: 10. a boundary beam; 20. a front cross member; 21. a first channel beam; 211. a first reinforcing structure; 30. a front middle cross beam; 31. a second channel beam; 40. a rear middle cross beam; 41. a third channel beam; 411. a second reinforcing structure; 50. a rear cross member; 51. reinforcing the vertical beam; 60. a front vertical beam; 70. and a middle vertical beam.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only 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 to implicitly indicate 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 longitudinal direction refers to the longitudinal direction of the vehicle, the vehicle lateral direction refers to the lateral width direction of the vehicle, and the up-down direction refers to the height direction of the vehicle.

Referring to fig. 1 and fig. 2, the rear floor frame of the present invention will now be described. The rear floor framework comprises two edge beams 10, a reinforcing cross beam and a plurality of reinforcing vertical beams 51 with different structures and/or sizes; wherein, the two boundary beams 10 are distributed along the longitudinal direction of the vehicle body in a bilateral symmetry way; two ends of the reinforcing beam are respectively and fixedly connected with the two edge beams 10, and the reinforcing beam comprises a plurality of beams which are sequentially distributed at intervals from front to back along the longitudinal direction of the vehicle body; a plurality of reinforcing vertical beams 51 are distributed at intervals in the lateral direction of the vehicle body on one of the cross members.

It should be noted that, in order to achieve the frequency avoiding effect at different positions and reduce resonance in this embodiment, the structural sizes of the reinforcing vertical beams 51 are different, as shown in fig. 1, at least one cross beam of the reinforcing vertical beam 51 forms a cross structure, and at least one reinforcing vertical beam 51 and the cross beam form a T-shaped cross structure.

Compared with the prior art, the rear floor framework provided by the embodiment, a plurality of cross beams are arranged at intervals in the extending direction of the boundary beam 10 to serve as reinforcing structures, the structural strength of the rear floor framework can be integrally improved, the reduction of vibration response sensitivity is facilitated, vibration noise is suppressed, on the basis, a plurality of reinforcing vertical beams 51 with different structures and/or sizes are distributed on one cross beam, the strength difference can be formed between different positions of the rear floor framework when the connecting strength between the cross beam and a rear floor plate is improved, the frequency avoidance design is realized due to different response ranges of all positions to vibration frequency, the resonance between different positions is avoided, the response sensitivity to vibration can be further reduced, on the premise that the weight is not increased, the suppression effect of the rear floor framework on vibration and noise energy can be improved, and the riding comfort of a vehicle is further improved.

In some embodiments, referring to fig. 1, the plurality of cross beams are, from front to back, a front cross beam 20, a front middle cross beam 30, a rear middle cross beam 40, and a rear cross beam 50; wherein, at least one front vertical beam 60 is connected between the front cross beam 20 and the front middle cross beam 30, and at least one middle vertical beam 70 is connected between the front middle cross beam 30 and the rear middle cross beam 40; a plurality of reinforcing vertical beams 51 are distributed on the rear cross member 50. A plurality of reinforcing vertical beams 51 are arranged on the rear cross beam 50, and the overall structural strength of the rear floor framework can be improved by additionally arranging the front vertical beam 60 and the middle vertical beam 70, so that the vibration frequency response sensitivity is reduced.

It should be noted that, in this embodiment, each component of the rear floor framework is a die-cast molding or a sheet metal molding, wherein two front vertical beams 60 and two middle vertical beams 70 are preferably used, the front middle cross beam 30 is taken as a reference, the two front vertical beams 60 are respectively connected with one third of the left and right sides of the front middle cross beam 30, the two middle vertical beams 70 are respectively connected with one fourth of the left and right sides of the front middle cross beam 30, and no connecting beam is arranged between the rear middle cross beam 40 and the rear cross beam 50, so that the front, middle and rear three sections of regions with different structural strengths of the rear floor framework can be respectively used for realizing frequency avoidance design among the regions by using the difference of the response ranges of the different structural strengths to the vibration frequency, thereby avoiding resonance.

In some embodiments, referring to fig. 1 and 2, the front cross member 20 includes two first channel beams 21 that are connected to each other in an up-and-down buckling manner, and a first reinforcing structure 211 is disposed in a middle portion of at least one of the first channel beams 21. Specifically, the two first channel beams 21 can be connected into a closed cavity structure in a vertical buckling and welding fixing mode, the cross-sectional dimension of the cavity is 90mm in the longitudinal direction of the vehicle body and 120mm in the height direction of the vehicle body, the structural strength of the front cross beam 20 is enhanced by utilizing the characteristic of high strength of the closed cavity, and the vibration response sensitivity is reduced.

As an embodiment of the first reinforcing structure 211, referring to fig. 1, the first reinforcing structure 211 is a recess having at least one step, and the recess extends along the transverse direction of the vehicle body. On the basis of adopting a closed cavity structure, the front cross beam 20 is structurally reinforced by designing pits with at least one step (preferably two steps) at the middle position, so that the strength of the middle weak position of the front cross beam 20 is improved, and the vibration response sensitivity can be further reduced.

In some possible implementations, referring to fig. 2, the front middle cross member 30 includes two second channel beams 31 with opposite slot orientations and staggered up and down to form an S-shape. The second channel beams 31 adopt a sheet metal structure with a trapezoidal cross section, notches of the two second channel beams 31 can be oppositely arranged and vertically staggered, one side groove wall of one second channel beam 31 and one side groove wall of the other second channel beam 31 are extended and staggered to form a gap suitable for a rear floor plate to pass through, one second channel beam 31 is buckled on the upper plate surface of the rear floor plate and is welded and fixed, the other second channel beam 31 is buckled on the lower plate surface of the rear floor plate and is welded and fixed, so that the two second channel beams 31 and the rear floor plate form a closed cavity respectively, and the two second channel beams 31 are connected into an S-shaped structure, so that the structural strength of the front middle cross beam 30 can be improved, a connecting area which is twice as wide as the second channel beam 31 in the longitudinal direction of the vehicle body can be formed between the front middle cross beam 30 and the rear floor plate, the integrity between the two second channel beams 31 and the rear floor plate can be up to 340mm practically, the integrity between the rear floor plate can be improved, the overall structural strength of the rear floor assembly can be improved, and the vibration response sensitivity can be reduced.

In some embodiments, as shown in fig. 1, the middle portion of the rear center cross member 40 is curved toward the front center cross member 30, and the dimension of the rear center cross member 40 in the longitudinal direction of the vehicle body gradually increases from the curved portion thereof toward both ends thereof. The rear middle cross beam 40 adopts a forward arched structure to improve the structural strength of the rear middle cross beam, the width (the size along the longitudinal direction of the vehicle body) is preferably about 132mm, and meanwhile, the connecting area and the strength between the rear middle cross beam 40 and the two side beams 10 can be improved by utilizing a horn mouth type structure with two gradually increased ends, so that the overall structural strength of the rear floor framework is improved, and the vibration response sensitivity is favorably reduced.

Specifically, in this embodiment, referring to fig. 2, the rear middle cross member 40 includes two third channel beams 41 connected in a manner of buckling up and down, and a plurality of convex or concave second reinforcing structures 411 are disposed in a middle portion of at least one of the third channel beams 41. Two third groove roof beams 41 are buckled respectively on the upper and lower face of back floor plate and welded fastening, and two third groove roof beams 41 are aimed at from top to bottom simultaneously to be connected structure as an organic whole with back floor plate, on this basis, set up the arch at the middle part that is located the third groove roof beam 41 of back floor plate below, thereby can improve the local structural strength on its middle position, reduce this regional vibration response sensitivity.

In some embodiments, referring to fig. 1, the middle portion of the rear cross member 50 is arched downward, and the reinforcing vertical beams 51, the middle vertical beam 70, and the front vertical beam 60 are distributed in a staggered manner in the lateral direction of the vehicle body.

The size of the rear cross member 50 in the longitudinal direction of the vehicle body can be set to about 100mm, the middle part of the rear cross member is arched downwards, the strength of the area in the height direction of the vehicle body can be improved by means of the characteristic that the arch structure is high in strength, and meanwhile, the plurality of reinforcing vertical beams 51 distributed at intervals on the arch structure are welded and fixed with the rear floor plate, the structural strength of the area in the longitudinal direction of the vehicle body can be increased, and therefore the vibration response sensitivity of the area is reduced.

Specifically, the section structure of rear frame member 50 is the cell type equally, the spiral-lock forms confined cavity structures on the floor plate spare behind during the equipment, strengthen vertical beams 51 and adopt three, wherein two are located rear frame member 50's bending position respectively, another is located rear frame member 50's centre, and three strengthen vertical beams 51 all weld the last face at rear floor plate spare, thereby can guarantee that rear frame member 50 and strengthen vertical beams 51 homoenergetic can be connected with rear floor plate spare spiral-lock for closed cavity, improve structural strength, reduce the corresponding sensitivity of vibration.

Further, in the present embodiment, the front cross member 20, the front center cross member 30, the rear center cross member 40, and the rear cross member 50 are different in size in the longitudinal direction of the vehicle body; the front vertical beam 60 and the middle vertical beam 70 are sheet metal parts with different thicknesses. The front cross beam 20 is of a closed cavity structure, the longitudinal upper dimension of the vehicle body is 90mm, the front middle cross beam 30 is of an S-shaped structure, the longitudinal upper dimension of the vehicle body is 340mm, the rear middle cross beam 40 is of a structure with the middle part arched towards the front middle cross beam 30, the longitudinal dimension of the vehicle body is designed to be 132mm, the rear cross beam 50 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 60 adopts a 1.2mm metal plate, and the middle vertical beam 70 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.

Based on the same inventive concept, with reference to fig. 1 to 2, the embodiment of the present application further provides a rear floor assembly, which includes the rear floor framework.

The utility model provides a back floor assembly compares with prior art, has adopted above-mentioned back floor skeleton, has the intensity difference between back floor skeleton overall structure intensity is high, the local structure to can reduce the vibration response sensitivity of back floor skeleton, structurally promote its suppression effect to vibration, noise energy from back floor skeleton, and then improve the vehicle and take advantage of the travelling comfort.

Under the same inventive concept, the present embodiment further provides a vehicle using the rear floor assembly, which has the same beneficial effects as the rear floor assembly, and therefore, redundant description is not repeated herein.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. Rear floor skeleton, its characterized in that includes:

the two side beams (10) are symmetrically distributed along the longitudinal direction of the vehicle body;

two ends of the reinforcing cross beam are respectively and fixedly connected with the two edge beams (10), and the reinforcing cross beam comprises a plurality of cross beams which are sequentially distributed at intervals from front to back along the longitudinal direction of the vehicle body;

and the plurality of vertical reinforcing beams (51) are distributed on one cross beam at intervals along the transverse direction of the vehicle body, and the structures and/or the sizes of the vertical reinforcing beams (51) are different from each other.

2. A rear floor framework as defined in claim 1, wherein the plurality of cross members are, from front to rear, a front cross member (20), a front middle cross member (30), a rear middle cross member (40), and a rear cross member (50);

wherein, preceding crossbeam (20) with be connected with at least one preceding perpendicular roof beam (60) between preceding intermediate transverse beam (30), preceding intermediate transverse beam (30) with be connected with at least one between back intermediate transverse beam (40) perpendicular roof beam (70), many strengthen perpendicular roof beam (51) distribute in on back crossbeam (50).

3. A rear floor framework according to claim 2, characterized in that the front cross member (20) comprises two first channel beams (21) which are connected into a whole by buckling up and down, and a first reinforcing structure (211) is arranged in the middle of at least one of the first channel beams (21).

4. The rear floor skeleton of claim 3, wherein the first reinforcing structure (211) is a recess having at least one step, the recess extending in a vehicle body lateral direction.

5. Rear floor framework according to claim 2, characterized in that said front central cross-member (30) comprises a second channel-member (31) with two notches facing in opposite directions and staggered up and down in an S-shape.

6. The rear floor skeleton according to claim 2, wherein the middle portion of the rear cross member (40) is curved toward the front cross member (30), and the dimension of the rear cross member (40) in the longitudinal direction of the vehicle body gradually increases from the curved portion thereof toward both ends thereof.

7. A rear floor framework according to claim 6, characterized in that the rear centre cross member (40) comprises two third channel beams (41) which are connected in a snap-fit manner one above the other, and that the middle of at least one of the third channel beams (41) is provided with a plurality of second reinforcing structures (411) which are convex or concave.

8. The rear floor skeleton according to claim 2, wherein the rear cross member (50) is arched downward at a middle portion thereof, and the front cross member (20), the front center cross member (30), the rear center cross member (40), and the rear cross member (50) are different in size in the longitudinal direction of the vehicle body; the front vertical beam (60) and the middle vertical beam (70) are sheet metal parts with different thicknesses.

9. A rear floor assembly comprising a rear floor frame as claimed in any one of claims 1 to 8.

10. A vehicle comprising the rear floor assembly of claim 9.

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