CN221477296U - Rear longitudinal beam, rear floor assembly and vehicle - Google Patents

Abstract

The present disclosure relates to a rear side rail, a rear floor assembly and a vehicle, the rear side rail is constructed as an integral die casting, wherein a reinforcing rib group is formed on the rear side rail, the reinforcing rib group includes a plurality of reinforcing ribs, and at least a portion of the reinforcing ribs are constructed such that thicknesses of both ends thereof are greater than a middle thickness. In order to reduce the number of parts of the rear side member for easy assembly and to achieve a lightweight design of the vehicle body, in the embodiment of the present disclosure, the rear side member is provided as an integral die cast. On this basis, in order to guarantee that the intensity of each position department of back longeron satisfies the requirement, form the strengthening rib group on the back longeron to, set up the strengthening rib strip into the thick middle form in both ends, can satisfy the demand of intensity adaptively, can realize the lightweight design of back longeron again, thereby reduce automobile body weight.

Description

Rear longitudinal beam, rear floor assembly and vehicle

Technical Field

The disclosure relates to the technical field of vehicles, in particular to a rear longitudinal beam, a rear floor assembly and a vehicle.

Background

In the related art, a rear longitudinal beam of a vehicle body is designed to be formed by welding a plurality of high-strength steel stamping plates. Because the performance requirements of all positions of the whole rear longitudinal beam are different, more reinforcing plates are added at the positions needing to be reinforced, so that the number of parts contained in the rear longitudinal beam is more, the assembly process is complex, and the whole vehicle assembly efficiency is lower. Further, such a rear side member has a large weight, which also causes an increase in the weight of the vehicle body.

Disclosure of utility model

To overcome the problems in the related art, the present disclosure provides a rear side rail, a rear floor assembly, and a vehicle.

According to a first aspect of embodiments of the present disclosure, there is provided a rear side member configured as an integral die cast, wherein a reinforcing rib group is formed on the rear side member, the reinforcing rib group includes a plurality of reinforcing ribs, and at least part of the reinforcing ribs are configured to have a thickness at both ends thereof greater than a middle thickness.

Optionally, the reinforcing rib group includes a connection reinforcing rib capable of being connected from one edge to the other edge of the rear side member, the connection reinforcing rib being configured such that a thickness of both ends for connection with the edge of the rear side member is greater than a thickness of a middle of the connection reinforcing rib.

Optionally, the surface profile of the reinforcing rib with the thickness of the two ends being greater than the thickness of the middle is configured into an arc shape.

Optionally, the rear longitudinal beam includes a body portion and a middle cross beam mounting portion protruding laterally from the body portion, and the reinforcing rib group includes at least one first reinforcing rib formed at a bottom of the middle cross beam mounting portion and extending laterally to the body portion.

Optionally, a subframe mounting portion is formed at a bottom of the body portion, and the first reinforcing rib extends from the center cross member mounting portion to the subframe mounting portion.

Optionally, the rear longitudinal beam comprises two first reinforcing ribs, and the two first reinforcing ribs are arranged in a crossing manner.

Optionally, the bottom of back longeron is provided with sub vehicle frame installation department, the back longeron is formed with the cavity, the strengthening rib group is including connecting between two opposite chamber walls of cavity and the position corresponds the second strengthening rib of sub vehicle frame installation department, the second strengthening rib is located the adjacent side of sub vehicle frame installation department.

Optionally, the rear longitudinal beam has a bending region bending toward the first direction, the bending region is formed with a cavity, and the reinforcing rib group includes a plurality of third reinforcing ribs formed in the cavity.

Optionally, at least some of the third ribs are arranged crosswise and/or at least some of the third ribs are connected between two cavity walls of the cavity opposite in the first direction.

Optionally, the rear side member includes a front end portion, a rear end portion, and a bending region formed between the front end portion and the rear end portion by bending, the rear side member is formed with a cavity, the set of reinforcing ribs includes a fourth reinforcing rib connected between opposite cavity walls of the cavity, the fourth reinforcing rib is configured to be connected from the rear end portion to the bending region.

Optionally, the bending region includes an ascending section connected to the front end portion, a descending section connected to the rear end portion, and a gentle section connected between the ascending section and the descending section, and the fourth reinforcing rib is connected to the gentle section from the rear end portion.

Optionally, the reinforcing rib group includes a fifth reinforcing rib formed at a bottom of the rear side member, and the fifth reinforcing rib is disposed to extend in a longitudinal extension direction of the rear side member.

Optionally, a plurality of fifth reinforcing ribs are arranged at intervals, the reinforcing rib group comprises sixth reinforcing ribs connected among the fifth reinforcing ribs, and the sixth reinforcing ribs are configured as X-shaped ribs.

Optionally, the front end portion of the rear side member is configured to be connected to a vehicle body rocker, and the reinforcement rib group includes a seventh reinforcement rib formed in a cavity of the front end portion, the seventh reinforcement rib being configured to be connected obliquely between laterally opposite side walls of the cavity.

Optionally, the rear longitudinal beam comprises a body part, the front end of the body part is provided with a front cross beam installation part, the rear end of the body part is provided with an energy absorption box installation part, a C column connection part and a D column connection part which are arranged at intervals extend out of the body part, and the rear end of the body part extends out of the rear cross beam installation part.

According to a second aspect of embodiments of the present disclosure, there is provided a rear floor assembly comprising the rear stringers provided by the present disclosure.

According to a third aspect of embodiments of the present disclosure, there is provided a vehicle comprising the rear floor assembly provided by the present disclosure.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: in order to reduce the number of parts of the rear side member for easy assembly and to achieve a lightweight design of the vehicle body, in the embodiment of the present disclosure, the rear side member is provided as an integral die cast. On this basis, in order to guarantee that the intensity of each position department of back longeron satisfies the requirement, form the strengthening rib group on the back longeron to, set up the strengthening rib strip into the thick middle form in both ends, can satisfy the demand of intensity adaptively, can realize the lightweight design of back longeron again, thereby reduce automobile body weight.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural view of a rear side member according to an exemplary embodiment.

Fig. 2 is an outside view schematic diagram of a rear side rail according to an exemplary embodiment.

Fig. 3 is a schematic top view of a rear side rail according to an exemplary embodiment.

FIG. 4 is a schematic diagram of a rear floor assembly, according to an exemplary embodiment.

Description of the reference numerals

100-Rear side frame, 200-front side frame, 300-middle side frame, 400-rear side frame, 500-energy-absorbing box, 600-C column, 700-D column, 800-rear floor, 1-body portion, 11-bending region, 111-ascending section, 112-descending section, 113-gentle section, 12-front end portion, 13-rear end portion, 2-middle side frame mounting portion, 31-first reinforcing rib, 32-second reinforcing rib, 33-third reinforcing rib, 34-fourth reinforcing rib, 35-fifth reinforcing rib, 36-sixth reinforcing rib, 37-seventh reinforcing rib, 4-subframe mounting portion, 5-front side frame mounting portion, 6-energy-absorbing box mounting portion, 7-C column connecting portion, 8-D column connecting portion, 9-rear side frame mounting portion.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

In the present disclosure, unless otherwise stated, terms such as "front, rear, longitudinal, and transverse" are defined according to the direction of use of the vehicle, and specifically refer to the directions of the drawings in fig. 2 and 3, where the left side of the drawing in fig. 2 is the front, the right side is the rear, the left-right direction is the longitudinal direction, and the direction perpendicular to the drawing is the transverse direction, the right side of the drawing in fig. 3 is the front, the left side is the rear, the left-right direction is the longitudinal direction, and the up-down direction is the transverse direction, and "inside and outside" are defined with respect to the own contours of the respective parts. The terms "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not necessarily for the order or importance.

According to a first aspect of embodiments of the present disclosure, a rear side rail is provided for mounting at a rear portion of a vehicle body for providing a mounting location for other components. The rear side member may extend in the longitudinal direction of the vehicle, i.e., in the front-rear direction of the vehicle after being mounted to the vehicle body. In the presently disclosed embodiment, the rear side member 100 is constructed as an integral die cast, i.e., the rear side member 100 is integrally die cast, instead of a rear side member formed by joining a plurality of parts by welding or the like as in the prior art. Wherein, can be formed with the strengthening rib group on the back longeron 100, the strengthening rib group includes many strengthening ribs, and the strengthening rib can set up in the region that back longeron 100 needs intensity of strengthening to satisfy the performance demand in each position of back longeron 100. It will be appreciated here that the set of reinforcing bars is also part of the integrally formed part of the rear side rail and is likewise formed by die casting. And, at least a part of the reinforcing bead is configured such that the thickness of both ends is greater than the thickness of the middle, for example, the reinforcing bead is a structure protruding from some surfaces of the rear side member, and the height of the protrusions at both ends of the reinforcing bead is higher than the height of the protrusions at the middle of the reinforcing bead. It is found through analysis that when the rear side member 100 receives external forces such as collision force, the force applied to the edge of each stressed position is generally greater than that applied to the middle position, so that in order to ensure structural strength, the two ends of the reinforcing rib are thicker to bear larger load, and the middle position is thinner to save materials.

Through the above technical scheme, in order to reduce the number of parts of the rear side member, so as to facilitate assembly and realize a lightweight design of the vehicle body, in the embodiment of the present disclosure, the rear side member 100 is provided as an integral die casting. On this basis, in order to ensure that the strength of each position of the rear longitudinal beam 100 meets the requirements, a reinforcing rib group is formed on the rear longitudinal beam 100, and reinforcing ribs are arranged in a form of being thick at both ends and thin in the middle, so that the strength requirements can be met adaptively, and the lightweight design of the rear longitudinal beam 100 can be realized, thereby reducing the weight of the vehicle body.

In the disclosed embodiment, the set of reinforcing bars may include connection reinforcing bars that can be connected from one edge to another edge of the rear side member 100. For example, referring to fig. 2 and 3, the first stiffener 31 described below may be connected from the edge of the center beam mounting portion 2 to the edge of the body portion 1, and the second stiffener 32, the third stiffener 33, and the fourth stiffener 34 may all be connected from one edge to the other edge of the cavity described below, and these stiffeners may all be understood as connecting stiffeners. In the embodiment of the present disclosure, the connection stiffener may be configured such that the thickness of both ends for connection with the edge of the rear side member 100 is greater than the thickness of the middle of the connection stiffener, by purposefully setting the thickness of the stiffener to satisfy both strength requirements and part weight requirements.

In one embodiment, the surface profile of the reinforcing ribs with the two ends thicker than the middle thickness can be configured into an arc shape, so that the thickness change of the reinforcing ribs can be smoothly transited, the stress distribution is uniform, and the condition of breakage caused by stress concentration is avoided.

Referring to fig. 1 and 3, the rear side member 100 may include a body portion 1 and a center cross member mounting portion 2 formed to protrude laterally from the body portion 1, and referring to fig. 4, the center cross member 300 may be mounted on the center cross member mounting portion 2 by, for example, screwing. The reinforcing rib group may include at least one first reinforcing rib 31, the first reinforcing rib 31 being formed at the bottom of the middle cross member mounting portion 2 and extending laterally to the body portion 1 to enhance the structural strength of the middle cross member mounting portion 2 through the first reinforcing rib 31, ensuring the mounting stability of the middle cross member 300. The lateral extension here may mean that there may be a component in the extension direction in the lateral direction so that the first reinforcing bead 31 may reach the body portion 1 from the center cross member mounting portion 2.

As shown in fig. 3, the bottom of the body portion 1 may be formed with a sub-frame mounting portion 4 for connecting the rear side member 100 with the sub-frame. The first reinforcing bead 31 may extend from the center cross member mounting portion 2 to the sub-frame mounting portion 4, so that the structural strength of the center cross member mounting portion 2 is satisfied while the lateral rigidity of the sub-frame mounting portion 4 is also enhanced. By realizing strength reinforcement at a plurality of positions by sharing the reinforcing ribs, the structure of the rear side member 100 can be simplified, and the mass of the rear side member 100 can be reduced.

In one embodiment, referring to fig. 3, the rear longitudinal beam 100 may include two first reinforcing ribs 31 to play a role of improving strength, and the two first reinforcing ribs 31 may be disposed in a crossing manner to further realize superposition of the structural strength enhancing effect.

In the embodiment of the disclosure, the rear longitudinal beam 100 is formed with a cavity, and the arrangement of the cavity can reduce the weight of the rear longitudinal beam 100 and is also convenient for casting molding. When the subframe attachment portions 4 are provided at the bottom of the rear side member 100, two subframe attachment portions 4 are provided at the bottom of the rear side member 100 in the bottom view of the rear side member 100 shown in fig. 3. Referring to fig. 2, the bead group may include a second bead 32 connected between opposite cavity walls of the cavity and positioned corresponding to the sub-frame mounting portion 4, wherein the second bead 32 is positioned adjacent to the sub-frame mounting portion 4, and the second bead 32 is positioned laterally to the rear side member 100 when the sub-frame mounting portion 4 is positioned at the bottom of the rear side member 100. Wherein the position correspondence is understood as a position close to each other, corresponding in the longitudinal direction. By providing the second reinforcing rib 32, two cavity walls of the cavity at the corresponding subframe mounting portion 4 may be connected, for example, in the embodiment of the present disclosure, the upper and lower cavity walls of the rear side member 100 are connected, so that the local rigidity of the subframe mounting portion 4 is improved, and the mounting reliability is ensured.

According to one embodiment of the present disclosure, as shown in fig. 2, the rear side member 100 has a bending region 11 bent in a first direction, for example, in one embodiment, the bending region 11 is bent upward in the vehicle direction. The bending region 11 may be formed with a cavity, and the reinforcing rib group may include a plurality of third reinforcing ribs 33 formed in the cavity, only two third reinforcing ribs 33 are labeled in fig. 2, and other reinforcing ribs between the two third reinforcing ribs 33, which are not labeled, except for the labeled fourth reinforcing rib 34, are also third reinforcing ribs. Here, the fourth bead 34 may also serve the same function as the third bead 33, except that it serves to transmit the collision load as described below. In fig. 2, the front end portion 12 and the rear end portion 13 of the rear side member 100 are not positioned at the same horizontal position, and when the rear side member 100 receives a rear impact force, a large bending moment is generated in the bending region 11, so that the rear side member 100 is easily bent, and by providing the third reinforcing rib 33, the bending resistance of the bending region when receiving the rear impact load can be increased, and the performance of the rear side member 100 can be improved.

Wherein, in one embodiment, at least part of the plurality of third reinforcing ribs 33 may be disposed in a crossing manner to further enhance structural strength and bending resistance.

In one embodiment, at least some of the plurality of third ribs 33 may be connected between two cavity walls of the cavity opposite in the first direction, that is, between two cavity walls opposite up and down in fig. 2, so as to increase the overall structural strength of the bending region 11, and to exert a bending-resistant effect. Part of the third reinforcing ribs 33 can be connected from one cavity wall to the middle position of the cavity body without extending to the other cavity wall, and can be adaptively designed according to the actual stress analysis structure so as to avoid the situation of material waste caused by excessive reinforcement.

Referring to fig. 2, the rear side member 100 may include a front end portion 12, a rear end portion 13, and a bending region 11 formed by bending between the front end portion 12 and the rear end portion 13, and the rear side member 100 is formed with a cavity, the reinforcing rib group may include fourth reinforcing ribs 34 connected between opposite cavity walls of the cavity, and the fourth reinforcing ribs 34 may be configured to be connected from the rear end portion 13 to the bending region 11. By providing the fourth bead 34, the back collision load received by the rear end portion 13 can be transmitted to the front end portion 12 through the bending region 11 by the guide of the fourth bead 34, and the rear side member 100 is ensured not to be bent laterally.

Wherein the bending region 11 includes an ascending section 111 connected to the front end section 12, a descending section 112 connected to the rear end section 13, and a gentle section 113 connected between the ascending section 111 and the descending section 112, the fourth reinforcing bead 34 may be connected from the rear end section 13 to the gentle section 113, and the backside impact force may be further transmitted to the front end section 12 connected to the ascending section 111 through the gentle section 113.

According to an embodiment of the present disclosure, referring to fig. 3, the reinforcement rib group may include fifth reinforcement ribs 35 formed at the bottom of the rear side member 100, and the fifth reinforcement ribs 35 may be disposed to extend in the longitudinal extension direction of the rear side member 100. For example, the fifth reinforcing beads 35 may be provided in accordance with the trend adaptability of the rear side member 100 in fig. 3. The fifth reinforcing ribs 35 can improve the bending resistance of the bottom surface of the rear longitudinal beam 100, avoid the situation that the rear longitudinal beam 100 is locally retracted after being subjected to longitudinal impact force, and improve the collision safety performance of the vehicle.

Wherein, a plurality of fifth reinforcing ribs 35 may be provided on the bottom of the rear side member 100, the plurality of fifth reinforcing ribs 35 may be provided at intervals, and the reinforcing rib group may include sixth reinforcing ribs 36 connected between the plurality of fifth reinforcing ribs 35, the sixth reinforcing ribs 36 being configured as X-shaped ribs. The sixth bead 36 may further mention the strength property of the fifth bead 35, thereby further improving the crash safety performance of the vehicle.

According to one embodiment of the present disclosure, the front end portion 12 of the rear side member 100 is for connection with a rocker beam, and the bead set may include a seventh bead 37 formed in a cavity of the front end portion 12. Wherein the seventh reinforcement rib 37 may be configured to be obliquely connected between laterally opposite side walls of the cavity. The seventh reinforcing rib 37 is disposed obliquely, and may have both components extending in the lateral and longitudinal directions, so as to increase the longitudinal load-carrying capacity of the rear side member 100 and the lateral load-carrying capacity of the rear side member 100 under the side impact condition. The seventh reinforcing ribs 37 may be provided in plural numbers, and may be partially disposed so as to intersect.

Referring to fig. 1, a rear side member 100 in the embodiment of the present disclosure includes a body portion 1. The front end of the body portion 1 may be provided with a front beam mounting portion 5 for mounting the front beam 200 by means of, for example, screw-coupling, and the front beam mounting portion 5 may include a stud structure. The rear end of the body part 1 may be provided with a crash box mounting part 6 for mounting the crash box 500, and the crash box mounting part 6 may be configured in a U-shaped clamping shape and may clamp the crash box 500 therein by a fastener. C post connecting portion 7 and D post connecting portion 8 that the interval set up can stretch out on the body portion 1, and C post connecting portion 7 can be connected through fastener and the fixed laminating of C post 600, and D post installation department 8 can be connected through fastener and D post 700 fixed connection. The rear end of the body portion 1 may be extended with a rear beam mounting portion 9 for being attached to the rear beam 400.

According to a second aspect of the disclosed embodiments, there is further provided a rear floor assembly, including the rear side members 100 described above, the number of the rear side members 100 being two, and further including the front cross member 200, the middle cross member 300, the rear cross member 400, the crash box 500, the C-pillar 600, the D-pillar 700, and the rear floor 800, in the manner described above. The rear floor assembly has all the beneficial effects of the rear longitudinal beam, and is not described herein.

According to a third aspect of the embodiments of the present disclosure, there is further provided a vehicle including the rear floor assembly described above, and having all the advantages of the rear floor assembly described above, which will not be described herein.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (17)

1. The rear longitudinal beam is characterized in that the rear longitudinal beam is constructed as an integral die casting, wherein a reinforcing rib group is formed on the rear longitudinal beam, the reinforcing rib group comprises a plurality of reinforcing ribs, and at least part of the reinforcing ribs are constructed in such a way that the thicknesses of two ends of the reinforcing ribs are larger than the middle thickness.

2. The rear side rail of claim 1, wherein the set of reinforcing bars includes a connection reinforcing bar connectable from one edge of the rear side rail to another edge, the connection reinforcing bar being configured such that a thickness of both ends for connection with the edges of the rear side rail is greater than a thickness of a middle of the connection reinforcing bar.

3. The rear side rail according to claim 1 or 2, wherein the surface profile of the reinforcing rib having a larger thickness at both ends than at the middle is configured in an arc shape.

4. The rear side rail of claim 1, wherein the rear side rail includes a body portion and a center sill mounting portion formed laterally protruding from the body portion, and the set of reinforcing bars includes at least one first reinforcing bar formed at a bottom of the center sill mounting portion and extending laterally to the body portion.

5. The rear side rail of claim 4, wherein a sub-frame mounting portion is formed at a bottom of the body portion, and the first reinforcing bead extends from the center cross member mounting portion to the sub-frame mounting portion.

6. The rear side rail of claim 4 or 5, wherein the rear side rail comprises two first reinforcing ribs, the two first reinforcing ribs being disposed crosswise.

7. The rear side rail of claim 1, wherein a subframe mounting portion is provided at a bottom of the rear side rail, the rear side rail is formed with a cavity, and the set of reinforcing ribs includes a second reinforcing rib connected between opposite cavity walls of the cavity and positioned corresponding to the subframe mounting portion, the second reinforcing rib being positioned adjacent to the subframe mounting portion.

8. The rear side rail of claim 1, wherein the rear side rail has a bending region bent in a first direction, the bending region forming a cavity, the set of reinforcing ribs including a plurality of third reinforcing ribs formed within the cavity.

9. The rear longitudinal beam of claim 8, wherein at least some of the third plurality of stiffeners are arranged crosswise and/or at least some of the third plurality of stiffeners are connected between two cavity walls of the cavity opposite in the first direction.

10. The rear rail of claim 1, comprising a front end portion, a rear end portion, and a bending region formed between the front end portion and the rear end portion, the rear rail being formed with a cavity, the set of reinforcing ribs comprising a fourth reinforcing rib connected between opposing cavity walls of the cavity, the fourth reinforcing rib configured to be connected from the rear end portion to the bending region.

11. The rear side rail of claim 10, wherein the bending region includes an ascending section connected to the front end portion, a descending section connected to the rear end portion, and a gentle section connected between the ascending section and the descending section, the fourth reinforcing bead being connected from the rear end portion to the gentle section.

12. The rear side member according to claim 1, wherein the bead group includes a fifth bead formed at a bottom portion of the rear side member, the fifth bead being disposed to extend in a longitudinal extension direction of the rear side member.

13. The rear side rail of claim 12, wherein a plurality of said fifth reinforcing ribs are spaced apart, said set of reinforcing ribs including a sixth reinforcing rib connected between a plurality of said fifth reinforcing ribs, said sixth reinforcing rib being configured as an X-shaped rib.

14. The rear side rail of claim 1, wherein a front end portion of the rear side rail is configured to be coupled to a body sill beam, the set of reinforcing ribs including a seventh reinforcing rib formed within a cavity of the front end portion, the seventh reinforcing rib configured to be obliquely coupled between laterally opposite side walls of the cavity.

15. The rear side rail of claim 1, wherein the rear side rail comprises a body portion, a front end of the body portion is provided with a front beam mounting portion, a rear end of the body portion is provided with an energy absorber box mounting portion, C-pillar connecting portions and D-pillar connecting portions are arranged at intervals and extend out of the body portion, and a rear beam mounting portion extends out of the rear end of the body portion.

16. A rear floor assembly comprising a rear rail according to any one of claims 1-15.

17. A vehicle comprising the rear floor assembly of claim 16.