CN218786032U - Middle floor and middle and rear floor assembly of automobile and automobile - Google Patents

Abstract

The utility model provides a well floor, well back floor assembly and car of car. The middle floor of the automobile is arranged in the middle of the floor of the automobile, and a plurality of convex-concave structures with different shapes are formed on the middle floor; the central axis of the vehicle is taken as an axis, and the convex-concave structures are asymmetrically arranged. The middle floor of the automobile of the utility model is provided with the convex-concave structure with the suitable shape according to the different bearing conditions of different areas on the middle floor and the different degrees excited by the vibration of the automobile, thereby playing the effect of strengthening the whole structural strength of the middle floor; and the convex-concave structure on the middle floor adopts an asymmetric left-right distribution mode, the possibility of resonance of the middle floor can be further reduced by the difference design of two sides, the resonance energy is reduced to form a frequency avoiding design, and the sensitivity of the middle floor to the vibration response of the vehicle is favorably reduced.

Description

Middle floor and middle and rear floor assembly of automobile and automobile

Technical Field

The utility model relates to an automobile body structure technical field, in particular to well floor of car. Additionally, the utility model discloses still relate to a well back floor assembly and car.

Background

The middle rear floor refers to a middle rear part in the floor of the vehicle body, the position is located at the middle rear part of the whole vehicle body, and the position is a position with a physical index located between a first-order bending mode and a second-order bending mode of the floor and has larger vibration energy response; moreover, the position is located at a weak part in the middle of the whole vehicle body and receives excitation vibration energy of the rear suspension, and energy of excitation of tires of the rear suspension, excitation of a rear motor reducer and the like can excite vibration of a middle rear floor plate, so that problems of vibration noise and the like are caused.

The position generally has higher Vibration sensitivity, but as the requirement of a user on vehicle comfort is continuously improved, the design of the middle rear part position of the vehicle body floor is more and more important, how to reduce the response of the middle rear part position of the vehicle body floor to Vibration Noise and how to improve the attenuation of the middle rear part position of the vehicle body floor to Vibration and Noise energy are important directions for developing and improving NVH (Noise, vibration and Harshness).

In the prior art, the middle floor and the rear floor at the position are designed to be flat plate structures, so that the strength is low; in a general reinforcement method, the structural strength of the middle and rear floor is improved by increasing the number of cross beams and longitudinal beams under the floor. However, because the existing middle and rear floor and the reinforcing beam framework structure thereof still have a lot of unreasonable points in the aspects of specific reinforcing structure design, arrangement position arrangement of the reinforcing beam and the like, the ideal effect is still difficult to achieve in the aspect of damping floor vibration caused by excitation of rear tires and excitation vibration of a rear motor reducer.

Therefore, it is necessary to continuously improve the design of the overall structure of the rear floor in the vehicle through deep research and development design, so as to achieve the effects of continuously reducing the vibration in the vehicle and improving the riding comfort of passengers in the vehicle.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a middle floor of an automobile to reduce the sensitivity of the middle floor to the vibration response of the automobile.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the middle floor of the automobile is arranged in the middle of the floor of the automobile, and a plurality of convex-concave structures with different shapes are formed on the middle floor; and taking the central axis of the vehicle as an axis, wherein the convex-concave structures are asymmetrically arranged.

Furthermore, the middle floor is formed by integrally stamping a steel plate with the thickness of 0.8-1.5 mm.

Further, along the front-rear direction of the vehicle, the middle floor bag comprises a main body section and a connection section which are connected in sequence, and the length T1 of the main body section is 3.5-4 times of the length T2 of the connection section; the convex-concave structure comprises longitudinal long-strip-shaped grooves and transverse long-strip-shaped grooves which are arranged on the main body section in a staggered mode, and oval grooves which are arranged on the connecting section.

Furthermore, the length direction of the oval grooves is consistent with that of the middle floor, and the oval grooves comprise first oval grooves with small width and second oval grooves with large width; the second oval recess is located the middle part of linking up the section, just the left and right sides of second oval recess all is equipped with a plurality of that the quantity is unequal first oval recess.

Furthermore, the longitudinal strip-shaped grooves are arranged at intervals, and at least one longitudinal strip-shaped groove in each longitudinal strip-shaped groove on one side of the central axis is bent.

Further, the convex-concave structure comprises a plurality of circular protrusions arranged on the main body section, and the circular protrusions are scattered among the longitudinal strip-shaped grooves.

Furthermore, the convex-concave structure comprises two arched parts arranged on the main body section, the two arched parts are arranged on two sides of the central axis, and at least part of the longitudinal strip-shaped groove is connected with the arched parts.

Compared with the prior art, the utility model discloses following advantage has:

the middle floor of the automobile of the utility model is provided with the convex-concave structure with the suitable shape according to the different bearing conditions of different areas on the middle floor and the different degrees excited by the vibration of the automobile, thereby playing the effect of strengthening the whole structural strength of the middle floor; and the convex-concave structure on the middle floor adopts an asymmetric left-right distribution mode, the difference design on two sides can further reduce the possibility of resonance of the middle floor, and the resonance energy is reduced to form a frequency avoiding design, thereby being beneficial to reducing the sensitivity of the middle floor to the vibration response of the vehicle.

In addition, the middle floor is divided into a front section and a rear section, and the main body section and the connecting section adopt convex-concave structures in different forms, so that the two sections have different vibration frequency characteristics, and the transmission of vibration on the middle floor is favorably attenuated. The length of the main body section is designed to be larger, so that longitudinally and transversely staggered long-strip-shaped grooves and transversely long-strip-shaped grooves are conveniently arranged on the main body section, and the main body section has good bearing performance.

Another object of the present invention is to provide a middle and rear floor assembly, wherein the middle and rear floor assembly is adopted in the present invention.

Furthermore, the middle and rear floor assembly also comprises a rear floor which is connected with the middle floor in a front-rear mode, and a reinforcing structure which is supported below the middle floor and the rear floor; the reinforcing structure comprises vehicle body longitudinal beams arranged on two sides of a vehicle body respectively, and a plurality of cross beams connected between the two vehicle body longitudinal beams; the crossbeam includes first crossbeam, second crossbeam, third crossbeam and the fourth crossbeam that sets up along the fore-and-aft direction of vehicle interval in proper order, first crossbeam is located the front end below on well floor, the second crossbeam with the third crossbeam is located the middle part below on well floor, the fourth crossbeam is located the front portion below on back floor, just first crossbeam with between the second crossbeam with between the third crossbeam, and the third crossbeam with all be equipped with the longeron between the fourth crossbeam.

The middle and rear floor assembly of the utility model has the technical advantages of the middle floor of the automobile; moreover, a framework reinforcing structure formed by vehicle body longitudinal beams and cross beams is arranged below the middle rear floor, so that stable support for the middle rear floor can be formed; the middle and rear floor is formed by splicing two plates of the middle floor and the rear floor, so that the structure and the assembly are convenient, the arrangement positions of the first cross beam, the second cross beam, the third cross beam and the fourth cross beam are reasonably distributed based on the front and rear arrangement conditions of the middle floor and the rear floor, the middle and front part area of the middle and rear floor formed by the middle floor and the front part of the rear floor can be reinforced in a targeted manner, and the vibration condition of the middle and front part area excited by the vibration of a rear suspension, a rear motor reducer and the like is favorably improved.

In addition, another aim at of the utility model is to provide a car, the car adopts the well back floor assembly of the utility model. The utility model discloses a car has the technical advantage of foretell well back floor assembly.

Drawings

The accompanying drawings, which form a part of the present disclosure, are provided to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions thereof are provided to explain the present disclosure, wherein the related terms in the front, back, up, down, and the like are only used to represent relative positional relationships, and do not constitute an undue limitation of the present disclosure. In the drawings:

fig. 1 is a schematic overall structure diagram of a middle floor according to a first embodiment of the present invention;

fig. 2 is a top view of a middle rear floor according to a second embodiment of the present invention; (ii) a

Fig. 3 is a schematic perspective view of a middle and rear floor assembly according to a second embodiment of the present invention;

fig. 4 is a top view of a rear middle floor assembly according to a second embodiment of the present invention;

fig. 5 is a bottom view of a middle and rear floor assembly according to a second embodiment of the present invention;

fig. 6 is a schematic structural view of a reinforcing structure of a middle and rear floor according to a second embodiment of the present invention after removing the middle floor and the rear floor;

FIG. 7 is a top view of the reinforcing structure of FIG. 6;

fig. 8 is a partial structural schematic view of a first cross member and a second cross member according to a second embodiment of the present invention;

FIG. 9 is a partial enlarged view of the area A in FIG. 8;

fig. 10 is a partial structural schematic view of a third cross member according to a second embodiment of the present invention;

fig. 11 is a partial schematic structural view of a fourth cross beam according to a second embodiment of the present invention;

fig. 12 is a partial structural schematic view of a fifth cross member and a sixth cross member according to a second embodiment of the present invention;

fig. 13 is a schematic cross-sectional view of the portion indicated by B-B in fig. 12.

Description of reference numerals:

1. a body rail; 100. a bottom wall; 101. a side wall; 102. flanging the longitudinal beam; 11. a support plate;

2. a cross beam; 21. a first cross member; 22. a second cross member; 23. a third cross member; 24. a fourth cross member; 25. a fifth cross member; 26. a sixth cross member; 200. an inner cavity; 201. buckling the plate; 202. a side plate; 203. a base plate; 204. flanging the cross beam;

3. reinforcing the longitudinal beam; 31. a first reinforcing stringer; 32. a second reinforcing stringer;

41. a reinforcing plate; 42. a connecting plate; 43. a convex rib structure; 44. an arch-shaped bulge; 411. a first reinforcing plate; 412. a second reinforcing plate; 420. a chamber; 421. connecting a bottom plate; 422. connecting the plate side plate; 423. a bending plate; 424. a lap plate; 425. an interlayer cavity; 441. a first arched projection; 442. a second dome-shaped protrusion;

5. a middle floor; 56. a convex-concave structure; 51. a main body section; 52. a joining section; 500. a circular protrusion; 501. a longitudinal strip-shaped groove; 502. a transverse strip-shaped groove; 503. an arching portion; 504. a first elliptical recess; 505. a second elliptical recess;

6. a rear floor; 7. a rear wheel cover plate; 8. a trunk floor.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the appearances of the terms first, second, etc. in the figures are also for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The present embodiment relates to a middle floor of an automobile, which is provided in the middle of a floor of the automobile, and an example of which is shown in fig. 1.

In a whole, the middle floor 5 of the automobile is formed with a plurality of convex-concave structures 56 with different shapes; the convex-concave structures 56 are asymmetrically arranged with the central axis of the vehicle as the axis.

Preferably, the middle floor 5 is integrally formed by stamping and forming a steel plate with the thickness of 0.8-1.5 mm, and has the advantages of good structural strength, convenience in processing and construction and the like.

To achieve better effect of reducing the resonance of the middle floor panel 5, in the present embodiment, the middle floor panel 5 includes a main section 51 and an engaging section 52 connected in series in the front-rear direction of the vehicle, and the length T1 of the main section 51 is 3.5 to 4 times the length T2 of the engaging section 52. Based on the above segmentation, the convex-concave structure 56 of the present embodiment includes longitudinal elongated grooves 501 and transverse elongated grooves 502 alternately disposed on the main body segment 51, and elliptical grooves disposed on the connecting segment 52.

The middle floor 5 is divided into a front section and a rear section, and the main body section 51 and the connecting section 52 adopt convex-concave structures 56 with different forms, so that the two sections have different vibration frequency characteristics, and the transmission of vibration on the middle floor 5 is favorably attenuated. The length of the body segment 51 is designed to be larger, so that the longitudinal strip-shaped grooves 501 and the transverse strip-shaped grooves 502 which are criss-cross are conveniently arranged on the body segment 51, and therefore, the body segment 51 has good load bearing performance. Obviously, the length of the main body section 51 and the length of the connecting section 52 are both the dimensions in the front-rear direction of the vehicle; in the present embodiment, the total length of the middle floor 5 is 1073mm, wherein the length T1=848mm of the main body section 51 and the length T2=225mm of the engaging section 52.

Among them, the length direction of the oval groove is preferably set to coincide with the length direction of the middle floor 5, and in this embodiment, the oval groove is set to be two kinds of the first oval groove 504 having a smaller width and the second oval groove 505 having a larger width. Wherein, the second elliptical groove 505 is disposed in the middle of the connecting section 52, specifically two side-by-side grooves. A plurality of first elliptical grooves 504 with different numbers are arranged on the left and right sides of the two second elliptical grooves 505. In the present embodiment, the specific dimensions of each first elliptical groove 504 are 48mm in width, 103mm in length and 8mm in depth, and the specific dimensions of each second elliptical groove 505 are 93mm in width, 103mm in length and 8mm in depth.

It should be noted here that the length of the middle floor panel 5, the main body section 51, and the engaging section 52 refers to their dimension in the vehicle front-rear direction, and the width refers to their dimension in the vehicle left-right direction. In addition, in the present embodiment, the concave-convex direction of each concave-convex structure 56 is viewed from the lower side of the floor, and the concave direction of the concave groove, the dent, etc. is toward the upper side of the vehicle, and is convex when viewed from the upper side of the floor; similarly, the direction in which the protrusion, arch, or the like protrudes is toward the lower side of the vehicle, and the shape is concave when viewed from above the floor. Obviously, the difference in the specific directions of the above-mentioned unevenness does not form a limitation to the scope of the present invention.

As shown in fig. 1, two first elliptical grooves 504 are on the left side of two second elliptical grooves 505, and four first elliptical grooves 504 are on the right side. Based on the situation that the cross beams 2 are arranged below the middle floor 5 for supporting, the oval grooves on the connecting section 52 and the longitudinal strip-shaped grooves 501 on the main body section 51 are arranged along the length direction of the middle floor 5, so that a cross fit structure can be formed with the cross beams 2, and the area of the middle floor 5 between the cross beams 2 can also have stable bearing performance. The number of the first elliptical grooves 504 is asymmetrically distributed, which can reduce the occurrence of resonance.

In the body segment 51, the longitudinal elongated grooves 501 are a plurality of grooves arranged at intervals in the width direction of the body segment 51, and at least one longitudinal elongated groove 501 is bent in each longitudinal elongated groove 501 on the side of the central axis of the vehicle. The plurality of longitudinal strip-shaped grooves 501 are arranged on the main body segment 51 at intervals, so that the main body segment 51 can have good structural strength. Since the center line in the width direction of the center floor panel 5 coincides with the center axis of the vehicle, the position reference of "the center axis of the vehicle" will be also expressed below in terms of "the center line of the center floor panel 5", "the center line of the main body section 51", and the like.

In this embodiment, 12 longitudinal elongated grooves 501 with a depth of 8mm, a width of 33mm and different lengths are designed on the main body section 51, and in order to avoid the frequency, 6 longitudinal elongated grooves 501 on the left side and 6 longitudinal elongated grooves 501 on the right side are designed to have an arch-shaped bending design in one longitudinal elongated groove 501 in the 6 longitudinal elongated grooves 501 on the right side, which forms a difference with each longitudinal elongated groove 501 on the left side, so as to avoid resonance. Wherein, the four longitudinal strip-shaped grooves 501 close to the edge of the main body segment 51 and close to the center line of the main body segment 51 are arranged in the overall length of the main body segment 51, and the other 8 longitudinal strip-shaped grooves 501 are arranged in groups of four in the middle of the left half part and the right half part of the main body segment 51 in a matrix arrangement. The transverse long-strip-shaped groove 502 is designed to be one, and intersects with 10 of the 12 longitudinal long-strip-shaped grooves 501, the width of the transverse long-strip-shaped groove 502 is 55mm, the length of the transverse long-strip-shaped groove is 1085mm, and the depth of the transverse long-strip-shaped groove is 5mm.

In addition to the longitudinal elongated grooves 501 and the transverse elongated grooves 502 described above, the projection and depression structure 56 in the body segment 51 further includes a plurality of circular protrusions 500 and raised portions 503. Wherein, the circular protrusions 500 are scattered among the longitudinal strip-shaped grooves 501; the number of the arched parts 503 is two, the two arched parts 503 are partially arranged on both sides of the midline of the middle floor 5, and at least part of the longitudinal strip-shaped groove 501 is connected with the arched parts 503.

Based on the distribution of the longitudinal elongated grooves 501, a plurality of circular protrusions 500 are disposed between two adjacent longitudinal elongated grooves 501, so as to further increase the structural strength of the main body segment 51; in this embodiment, a row of circular protrusions 500 (three in total) is designed along the center line of the main body 51, three rows are designed on the left side, one row is designed on the right side, and the difference design on the left and right sides can further achieve the frequency avoiding effect to reduce the resonance energy. By providing two raised portions 503 at intervals in the width direction of the main body segment 51, the strength of the main body segment 51 in the width direction can be increased. Specifically, the two raised portions 503 of the present embodiment are designed at two third positions in the width direction of the middle floor 5, and have a width of 195mm, a length of 312mm, and a height of 12mm; the use of the domed convex reinforcement further increases the strength of the body section 51 and reduces the sensitivity of the vibrational response.

In summary, the middle floor of the automobile of the present embodiment, by providing the convex-concave structure 56 with a suitable shape according to the load bearing condition of different areas on the middle floor 5 and the degree of excitation caused by vibration of the vehicle, can achieve the effect of enhancing the overall structural strength of the middle floor 5; moreover, the convex-concave structures 56 on the middle floor 5 are distributed in an asymmetric left-right distribution mode, the possibility of resonance of the middle floor 5 can be further reduced through the difference design of two sides, resonance energy is reduced to form a frequency avoiding design, and the sensitivity of the middle floor 5 to the vibration response of the vehicle is favorably reduced.

Example two

The embodiment relates to a middle rear floor assembly, which adopts the middle floor of the automobile provided by the first embodiment; an exemplary structure thereof is shown in fig. 2 and 3. In the middle rear floor assembly, there are also provided a rear floor 6 connected to the middle floor 5 in a front-rear direction, and a reinforcing structure supported below the middle floor 5 and the rear floor 6. The rear floor panel 6 is also preferably constructed in a similar manner to the middle floor panel 5, i.e., a plurality of raised and recessed structures 56 are provided thereon.

Referring to fig. 3 to 6, in the present embodiment, the middle floor 5 and the rear floor 6 constitute a middle rear floor, and the reinforcing structure supported below includes vehicle body side members 1 disposed on both sides of the vehicle body, and a plurality of cross members 2 connected between the vehicle body side members 1. Meanwhile, the cross beam 2 comprises a first cross beam 21, a second cross beam 22, a third cross beam 23 and a fourth cross beam 24 which are sequentially arranged at intervals in the front-rear direction of the vehicle; further, the first cross member 21 is located below the front end of the middle floor 5, the second cross member 22 and the third cross member 23 are located below the middle portion of the middle floor 5, and the fourth cross member 24 is located below the front portion of the rear floor 6; reinforcing longitudinal beams 3 are arranged between the first cross beam 21 and the second cross beam 22, between the second cross beam 22 and the third cross beam 23, and between the third cross beam 23 and the fourth cross beam 24.

Particularly, the reinforcing structure of this embodiment forms the support chassis of well back floor, and when in actual use, well back floor and reinforcing structure welding link firmly as an organic whole, form the well back floor assembly of vehicle. Of course, as shown in fig. 3 or 4, a trunk floor 8 is provided at the rear of the middle rear floor assembly to construct a frame of a trunk, and a rear wheel house 7 is provided at the side of the middle rear floor assembly to construct a frame of a rear wheel house.

As shown in fig. 7, in the present embodiment, the reinforcing longitudinal beam 3 includes a first reinforcing longitudinal beam 31 having both ends connected to the first cross member 21 and the third cross member 23, respectively; the second cross member 22 is connected to a middle portion of the first reinforcing longitudinal member 31, and preferably, is disposed in a cross shape. By arranging the first reinforcing longitudinal beam 31 between the first cross beam 21 and the second cross beam 22, a stable frame shaped like a Chinese character tian is formed by the two body longitudinal beams 1, the first cross beam 21, the second cross beam 22, the third cross beam 23 and the first reinforcing longitudinal beam 31, so that the centering floor 5 is stably supported; by utilizing the supporting structure with a plurality of closed ring bodies, the overall strength of the position is increased, and the response sensitivity of the front middle area of the middle and rear floor to vibration excitation can be further reduced.

Meanwhile, the reinforcing longitudinal beam 3 further comprises two second reinforcing longitudinal beams 32 connected between the third cross beam 23 and the fourth cross beam 24, and the two second reinforcing longitudinal beams 32 are respectively arranged at the left side and the right side of the central axis of the vehicle and are symmetrically arranged. Two second reinforcing longitudinal beams 32 are arranged between the third cross beam 23 and the fourth cross beam 24, the two body longitudinal beams 1, the third cross beam 23, the fourth cross beam 24 and the two second reinforcing longitudinal beams 32 form a 'mesh' shaped frame, the connecting area of the middle floor 5 and the rear floor 6 is reinforced, strong support is formed by a plurality of formed closed rings, the integral strength of the position is further enhanced, and the effect of damping vibration is achieved.

In addition to the first cross member 21, the second cross member 22, the third cross member 23, and the fourth cross member 24 described above, the cross member 2 of the present embodiment further includes a fifth cross member 25 located below the middle rear portion of the rear floor panel 6, and a sixth cross member 26 located below the rear end of the rear floor panel 6. By arranging the fifth cross beam 25 and the sixth cross beam 26 in the rear area of the middle rear floor, effective support for centering the rear part of the rear floor can be formed, so that the whole middle rear floor assembly forms a whole body with stable structure, and the improvement of the vibration attenuation of the whole middle rear floor assembly is facilitated.

As also shown in fig. 7, in the front-rear direction of the vehicle, the spacing D3 between the third cross member 23 and the fourth cross member 24, and the spacing D4 between the fourth cross member 24 and the fifth cross member 25 are each larger than the spacing between the other adjacent ones of the cross members 2. The space between every two adjacent cross beams 2 is reasonably set according to the position conditions of the middle floor 5 and the rear floor 6 and the different conditions of bearing in different areas of the middle floor and the rear floor and the vibration influence, so that the structural reinforcement effect of the whole reinforcement structure can be further enhanced.

Specifically, taking the case where the total length of the middle rear floor of the vehicle body is 2188mm and the width is about 945mm, the distance D1 between the first cross member 21 and the second cross member 22 may be set to 280mm, the distance D2 between the second cross member 22 and the third cross member 23 may be set to 296mm, the distance D3 between the third cross member 23 and the fourth cross member 24 may be set to 618mm, the distance D4 between the fourth cross member 24 and the fifth cross member 25 may be set to 533mm, and the distance D5 between the fifth cross member 25 and the sixth cross member 26 may be set to 269mm, for example. The distance difference between different intervals sets up more than 10mm at least to realize the differentiation of whole additional strengthening's overall structure intensity, reduce the risk that resonance produced.

According to the difference of the distance between different cross beams 2 and the positions of the cross beams, the width of each cross beam 2 should be designed differently, wherein the width of the first cross beam 21 and the width of the fourth cross beam 24 should be designed to be larger, and the width of the other cross beams 2 should be smaller. Specifically, the following description will be made in conjunction with the arrangement of the connecting plates 42, the reinforcing plates 41, and the like of the cross members 2.

In the reinforcing structure of the present embodiment, the beam structures of the body side member 1, the cross member 2 and the reinforcing side member 3 may be designed according to the existing commonly used technical solutions, and preferably, each beam adopts a beam structure having a cross section in a shape like a Chinese character 'ji', and at the same time, the open side of the cavity of the beam abuts against the middle rear floor. Each beam body adopts a structure in a shape like a Chinese character 'ji', so that the beam body has good self structural strength, and the side edges at the two sides of the beam body are abutted on the middle and rear floors, so that the supporting area of the middle and rear floors can be enlarged, a form similar to an arched support is formed, the sensitivity of the middle and rear floors to vibration excitation is favorably reduced, and the effect of improving the riding comfort of passengers in the vehicle is achieved.

Specifically, the cross section of the cross beam 2 is in a shape of a "u" and includes a bottom plate 203 and side plates 202 bent and formed on both sides of the bottom plate 203, and a cross beam flange 204 is formed on an edge portion of the side plates 202, and the cross beam flange 204 abuts against the middle rear floor. Similarly, the vehicle body side member 1 has a cross section in a "u" shape, and includes a bottom wall 100 and side walls 101 formed by bending on both sides of the bottom wall 100, and side member beads 102 formed at edge portions of the side walls 101 to abut on the middle and rear floor panels. The same structure of the inverted V-shaped structure is adopted by the body side member 1, so that the body side member 1 has good self-structural strength and forms good support for centering the rear floor. The reinforcing side member 3 may be provided with reference to the beam structure of the body side member 1 and the cross member 2.

It is to be emphasized that, in the present embodiment, the respective cross members 2 are connected to the body side members 1 via the connecting plates 42. Based on the above-described arrangement of the beam structures of the body side member 1 and the cross member 2, the following configuration is preferably adopted for the structure of the connecting plate 42 and the connection form thereof with the body side member 1.

Referring to fig. 8 to 12, the connection plate 42 of the present embodiment includes a connection plate bottom plate 421 overlapped on the bottom plate 203, and connection plate side plates 422 located at two sides of the connection plate bottom plate 421, and the two connection plate side plates 422 are respectively overlapped on the corresponding side plates 202; the connecting plate bottom plate 421 and the connecting plate side plate 422 enclose a cavity 420 of the connecting plate 42. Furthermore, the cross section of the cavity 420 of the connecting plate 42 on at least part of the cross member 2 is enlarged in the direction approaching the vehicle body side member 1. The cavity 420 of the connecting plate 42 is designed into a shape with an increasingly large cross section, so that the structural stability between the longitudinal beam 1 and the transverse beam 2 of the vehicle body can be effectively improved, and the damping effect of the connecting part on vibration transmission can be favorably improved. For example, at the end portion of the third cross member 23 shown in fig. 10, the connecting plate 42 is designed in a horn shape that opens toward the body side member 1, i.e., the width of the connecting plate 42 in the vehicle front-rear direction (including the distance between the two side plates 202) and the height of the connecting plate 42 in the vehicle up-down direction are each set gradually larger in the direction approaching the body side member 1, starting from the end portion of the cross member 2; in this way, the connecting plates 42 located at the connecting portions of the side members 1 and the cross member 2 can form a triangular supporting structure when viewed from the top-bottom or front-rear direction of the vehicle, and a good structural reinforcing effect can be achieved.

In the embodiment, the width of the third cross beam 23 is 69mm, the connecting plates 42 of the triangular supporting structures at the two ends of the third cross beam 23 are welded with the bottom wall 100 and the side wall 101 of the longitudinal beam of the vehicle body longitudinal beam 1, the connecting strength of the connecting plates 42 is increased by using the strength of two surfaces of the vehicle body longitudinal beam 1, meanwhile, an arch-shaped protrusion reinforcing structure can be designed on the vehicle body longitudinal beam 1 at the welding position, the strength of the connecting position is further increased, and the vibration transmission is reduced; the middle position of one side of the third cross beam 23 connected with the second reinforcing longitudinal beam 32 is designed with four convex rib structures 43, so that the welding area and the strength of the middle floor 5 are increased.

Further, as shown in fig. 12 and 13, at the joint of the fifth cross member 25 and the body side member 1, two connecting plates 42 are stacked at the end of the cross member 2; the connecting plate bottom plate 421 of the connecting plate 42 at the lower layer extends towards the direction of the vehicle body longitudinal beam 1 and is lapped on the bottom of the vehicle body longitudinal beam 1; the connecting plate 42 of the upper layer is clamped between the connecting plate 42 of the lower layer and the fifth cross beam 25, and a connecting plate bottom plate 421 of the connecting plate extends towards the direction of the vehicle body longitudinal beam 1 and is connected with the side part of the vehicle body longitudinal beam 1 in an abutting mode; the other parts of the two-layer connecting plate 42 can be in a laminated mode.

The connecting plate 42 arranged along the end shape of the shape-following cross beam 2 is also provided with a connecting plate bottom plate 421 and two connecting plate side plates 422; the connecting plate bottom plate 421 is overlapped on the bottom plate 203 in a stacked manner, and the connecting plate side plate 422 is overlapped on the side plate 202 in a stacked manner; the connecting plate 42 is connected to the side of the vehicle body longitudinal beam 1 by the bent plate 423 bent from the end of the connecting plate bottom plate 421 and the connecting plate side plate 422, or the connecting plate bottom plate 421 extends out of the lap plate 424 toward the bottom of the vehicle body longitudinal beam 1 to lap the bottom of the vehicle body longitudinal beam 1, so that a stable connection is formed between the end of the cross beam 2 and the vehicle body longitudinal beam 1. In this way, not only the connection stability between the cross beam 2 and the body side member 1 is significantly improved, but also when the bottom plate 203 of the cross beam 2 and the bottom wall 100 of the body side member 1 are vertically staggered and the lap plate 424 of the web bottom plate 421 is lapped on the bottom of the body side member 1, the web bottom plate 421 is inclined downward in the direction from the cross beam 2 toward the body side member 1, so that the web side plates 422 are substantially triangular, and the structural support strength of the web 42 is improved. Meanwhile, when two connecting plates 42 are stacked, the connecting plate bottom plate 421 of the connecting plate 42 positioned at the lower layer is lapped on the bottom of the vehicle body longitudinal beam 1 through the lapping plate 424, and the connecting plate bottom plate 421 of the connecting plate 42 positioned at the upper layer can be connected on the side part of the vehicle body longitudinal beam 1 through the bending plate 423 at the end part; the web bottom plates 421 of the two-layer webs 42 are spaced vertically at the connecting position on the body side member 1, and therefore, at the position close to the body side member 1, the sandwich cavity 425 is formed between the two-layer webs 42, which can further improve the damping effect of the connecting portion between the cross member 2 and the body side member 1 against the transmission of vibration.

It should be noted that the connecting plates 42 of the other cross members 2 can be designed in accordance with the arrangement of the connecting plates 42 of the fifth cross member 25, and the connecting plates 42 are preferably fixedly connected to both the side member flanges 102 and the side walls 101 of the vehicle body side member 1. The connecting plate 42 is connected to the side wall 101 and the longitudinal beam flange 102 of the vehicle longitudinal beam 1 at the same time, so that reliable connection firmness between the vehicle longitudinal beam 1 and the cross beam 2 can be guaranteed.

In order to further enhance the self-structural strength of each cross beam 2, in the present embodiment, based on the condition that the side plates 202 and the bottom plate 203 enclose the inner cavity 200 of the cross beam 2, a first reinforcing plate 411 supported between the two side plates 202 may be provided in the inner cavity 200 of the cross beam 2, and/or a second reinforcing plate 412 may be provided on the cross beam flange 204 of the cross beam 2. For example, as shown in fig. 8, two second reinforcing plates 412 are provided to the second cross member 22, and the second reinforcing plates 412 are connected to the middle rear floor. The second cross beam 22 is preferably 53mm in width, cross beam flanges 204 with the length of 15mm are arranged on two sides of the second cross beam 22, the connecting area and the connecting strength of the second cross beam and the middle floor 5 are increased, and a rib structure 43 with the length of 117mm and the protruding height of 10mm is arranged at the middle weak position of the second cross beam 22. By arranging the reinforcing plate 41 in the inner cavity 200 of the cross beam 2, strong support for the two side plates 202 can be formed, and the structural strength of the cross beam 2 is improved; the reinforcing plate 41 arranged on the beam flanging 204 of the beam 2 can effectively increase the connecting area of the beam 2 and the middle and rear floor, thereby improving the integral stability of the middle and rear floor and the beam 2.

Specifically, as shown in fig. 9 in combination with fig. 8 and 6, in the first beam 21 of the present embodiment, based on the condition that the first beam 21 is located at the end of the middle floor 5, a buckling plate 201 can be buckled above the first beam 21, so that the inner cavity 200 of the first beam 21 forms a closed chamber.

Moreover, the connecting plates 42 at the two ends of the first cross beam 21 are designed into a bell mouth shape, and the structural strength of the connecting plates 42 can be enhanced by utilizing the arch shape of the bell mouth structure, and the connecting area of the connecting plates and the body longitudinal beam 1 is increased, so that the strength of the two ends of the first cross beam 21 is fully increased by utilizing the strength of the body longitudinal beam 1. Moreover, the rib structure 43 having a depth of 10mm and a length 563mm and formed in an arch-shaped concave shape is designed in the middle of the first cross member 21, thereby achieving an effect of increasing the strength at the middle position. In order to further increase the strength of the first cross beam 21, as shown in fig. 9, two first reinforcing plates 411 are arranged in the inner cavity 200 of the first cross beam 21 at intervals, and the two first reinforcing plates 411 are respectively arranged at two sides of the first reinforcing longitudinal beam 31 to reinforce the middle of the first cross beam 21. The two first reinforcing plates 411 here have a thickness of 1.2mm, a width of 37mm, and a position of one third of the overall length of the first beam 21, so that the effects of increasing the strength of the first beam 21 and reducing the vibration response sensitivity thereof are achieved.

As shown in fig. 11 and 12, a first arched projection 441 is formed on the beam flange 204 of the partial beam 2, and a second arched projection 442 is formed at a connection portion between the beam flange 204 and the side plate 202 of the partial beam 2. The arched protrusions 44 are arranged on the beam flanges 204 or at the connecting portions of the beam flanges 204 and the side plates 202, so that the structural firmness of the beam flanges 204 of the beam 2 can be improved, and the connecting area and the connecting stability of the beam flanges 204 and the middle and rear floor can be increased, thereby achieving the effect of enhancing the supporting strength of the middle and rear floor.

The width of the fourth cross beam 24 in this embodiment is 80mm, and the connecting plates 42 with two ends designed into the shape of the bell mouth are also used, so that the strength of the body longitudinal beam 1 is fully utilized to increase the strength of the two ends of the fourth cross beam 24 by utilizing the characteristics that the bell mouth structure has large arch strength and large connecting area with the body longitudinal beam 1. The side and the top of the fourth beam 24 are provided with a plurality of rib structures 43, and two first arched protrusions 441 arranged at intervals are formed on the beam flange 204 of the fourth beam 24 facing to the rear side of the vehicle, so that the effects of increasing the overall strength of the fourth beam 24 and reducing the vibration response sensitivity are achieved.

The width of the fifth beam 25 is 60mm, two connecting plates 42 which are arranged in a stacked mode are arranged at two ends of the fifth beam, three rectangular convex rib structures 43 are arranged on the bottom plate 203, the strength of the bottom plate 203 can be improved, and the sensitivity of vibration response of the bottom plate is reduced; meanwhile, circular lightening holes are designed between adjacent rib structures 43 to reduce weight. The sixth beam 26 has a width of 48mm, and both ends are also designed as connecting plates 42 in a bell-mouth shape. In order to further increase the reinforcing area and the frequency avoiding effect of the middle rear floor panel, the widths of the beam flanges 204 at the front side and the rear side of the sixth beam 26 are respectively 14mm and 33mm so as to increase the welding area of the sixth beam and the rear floor 6, and the local frequency avoiding effect can be further realized by the width difference of the two sides. Furthermore, two second arched protrusions 442 are formed at a distance from each other at the connection portion between the beam flange 204 and the side plate 202 on the side (rear side) of the sixth beam 26 facing the trunk floor 8, thereby further increasing the strength of the beam flange 204.

In addition, the vehicle body side member 1 of the present embodiment is further provided with a plurality of support plates 11 supported between the two side walls 101, and each support plate 11 is provided corresponding to each cross member 2; a plurality of support plates 11 are arranged in the vehicle body longitudinal beam 1, so that good support for the strength of the vehicle body longitudinal beam 1 can be formed in the width direction of the vehicle body longitudinal beam 1; the supporting plate 11 is arranged at the position corresponding to the cross beam 2, so that the structural strength of the connecting part of the vehicle body longitudinal beam 1 and the cross beam 2 can be effectively enhanced, and a more stable foundation is provided for the arrangement of the cross beam 2.

In summary, in the middle and rear floor assembly of the present embodiment, the framework reinforcing structure formed by the vehicle body longitudinal beam 1 and the cross beam 2 is disposed under the middle and rear floor, so that a stable support for centering the rear floor can be formed; the middle and rear floor is formed by splicing two plates of the middle floor 5 and the rear floor 6, so that the structure and the assembly are convenient, the arrangement positions of the first cross beam 21, the second cross beam 22, the third cross beam 23 and the fourth cross beam 24 are reasonably distributed based on the front and rear arrangement conditions of the middle floor 5 and the rear floor 6, the middle front part area of the middle and rear floor formed by the front parts of the middle floor 5 and the rear floor 6 can be reinforced in a targeted manner, and the situation that the middle and front part area vibrates under the excitation of the vibration of a rear suspension, a rear motor reducer and the like is favorably improved.

EXAMPLE III

The embodiment relates to an automobile, and the automobile adopts the middle and rear floor assembly provided by the second embodiment. Through the structural reinforcement of the middle rear part of the floor, the structural performance of the plate can be obviously enhanced, the vibration response sensitivity is reduced, and a good structural foundation is provided for creating a quiet and comfortable driving space for a vehicle.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a well floor of car, locates the floor middle part of vehicle which characterized in that:

a plurality of convex-concave structures (56) with different shapes are formed on the middle floor (5); the convex-concave structures (56) are asymmetrically arranged by taking the central axis of the vehicle as an axis.

2. The middle floor of an automobile according to claim 1, characterized in that:

the middle floor (5) is formed by integrally stamping steel plates with the thickness of 0.8-1.5 mm.

3. The middle floor of an automobile according to claim 1, characterized in that:

the middle floor (5) comprises a main section (51) and a connecting section (52) which are connected in sequence along the front-rear direction of the vehicle, and the length T1 of the main section (51) is 3.5 to 4 times of the length T2 of the connecting section (52);

the convex-concave structure (56) comprises longitudinal long-strip-shaped grooves (501) and transverse long-strip-shaped grooves (502) which are arranged on the main body section (51) in a staggered mode, and oval-shaped grooves which are arranged on the connecting section (52).

4. The middle floor of an automobile according to claim 3, characterized in that:

the length direction of the oval grooves is consistent with that of the middle floor (5), and the oval grooves comprise a first oval groove (504) with a smaller width and a second oval groove (505) with a larger width;

the second oval groove (505) is arranged in the middle of the connecting section (52), and the left side and the right side of the second oval groove (505) are respectively provided with a plurality of first oval grooves (504) with different numbers.

5. The middle floor of an automobile according to claim 3, characterized in that:

the longitudinal strip-shaped grooves (501) are arranged at intervals, and at least one longitudinal strip-shaped groove (501) in each longitudinal strip-shaped groove (501) on one side of the central axis is bent.

6. The middle floor of an automobile according to claim 3, characterized in that:

the convex-concave structure (56) comprises a plurality of circular protrusions (500) arranged on the main body section (51), and the circular protrusions (500) are scattered among the longitudinal strip-shaped grooves (501).

7. The middle floor of an automobile according to any one of claims 3 to 6, characterized in that:

the convex-concave structure (56) comprises two arched parts (503) arranged on the main body section (51), the two arched parts (503) are respectively arranged on two sides of the central axis, and at least part of the longitudinal strip-shaped groove (501) is connected with the arched parts (503).

8. A middle and rear floor assembly, characterized in that:

the middle rear floor assembly adopts the middle floor of the automobile as claimed in any one of claims 1 to 7.

9. The mid-rear floor assembly as set forth in claim 8, wherein:

the middle and rear floor assembly also comprises a rear floor (6) connected with the middle floor (5) in a front-rear mode and a reinforcing structure supported below the middle floor (5) and the rear floor (6);

the reinforcing structure comprises vehicle body longitudinal beams (1) which are respectively arranged on two sides of a vehicle body, and a plurality of cross beams (2) which are connected between the two vehicle body longitudinal beams (1);

crossbeam (2) are including first crossbeam (21), second crossbeam (22), third crossbeam (23) and fourth crossbeam (24) that set up along the fore-and-aft direction interval in proper order, first crossbeam (21) is located the front end below of well floor (5), second crossbeam (22) with third crossbeam (23) are located the middle part below of well floor (5), fourth crossbeam (24) are located the front portion below of back floor (6), just first crossbeam (21) with between second crossbeam (22), second crossbeam (22) with between third crossbeam (23) and third crossbeam (23) with all be equipped with between fourth crossbeam (24) and strengthen longeron (3).

10. An automobile, characterized in that:

the vehicle employing the mid-rear floor assembly of claim 8 or 9.

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