阅读说明：本技术 一种车辆后地板框架结构及具有其的车辆 (Floor frame construction and have its vehicle behind vehicle ) 是由 林佳武 杨宏 陈东 耿富荣 于 2019-03-04 设计创作，主要内容包括：本发明提供了一种车辆后地板框架结构,包括设于车辆两侧的纵梁和设于所述纵梁之间的横梁,所述纵梁包括前纵梁、固接于所述前纵梁后端的后纵梁和用于与车辆上车体装配的连接纵梁,所述前纵梁、所述后纵梁和所述横梁为铝结构,所述连接纵梁为钢结构,所述连接纵梁设于所述前纵梁与所述后纵梁的外侧。本发明还涉及一种车辆,通过将前纵梁、后纵梁和横梁采用铝钣金件,连接纵梁采用钢钣金件,同时通过增设连接纵梁以有效地连接车辆上车体、车辆前地板框架结构,保证了车身后部框架的结构强度及刚度；同时解决了钢制车身重量超重的问题,体现了车身轻量化的设计。(The invention provides a vehicle rear floor frame structure which comprises longitudinal beams arranged on two sides of a vehicle and a cross beam arranged between the longitudinal beams, wherein each longitudinal beam comprises a front longitudinal beam, a rear longitudinal beam fixedly connected to the rear end of the front longitudinal beam and a connecting longitudinal beam used for being assembled with an upper vehicle body of the vehicle, the front longitudinal beam, the rear longitudinal beam and the cross beam are of aluminum structures, the connecting longitudinal beam is of a steel structure, and the connecting longitudinal beam is arranged on the outer sides of the front longitudinal beam and the rear longitudinal beam. The invention also relates to a vehicle, wherein the front longitudinal beam, the rear longitudinal beam and the cross beam are made of aluminum sheet metal parts, the connecting longitudinal beam is made of steel sheet metal parts, and the connecting longitudinal beam is additionally arranged to effectively connect the upper vehicle body and the front floor frame structure of the vehicle, so that the structural strength and rigidity of the rear frame of the vehicle body are ensured; meanwhile, the problem that the steel car body is overweight is solved, and the light-weight design of the car body is reflected.)

1. The utility model provides a floor frame construction behind vehicle, its characterized in that, including longeron (11) of locating the vehicle both sides with locate crossbeam (12) between longeron (11), longeron (11) include front longitudinal beam (11a), rigid coupling in back longeron (11b) of front longitudinal beam (11a) rear end and be used for with vehicle on the body assembly be connected longeron (11c), front longitudinal beam (11a) back longeron (11b) with crossbeam (12) are the aluminium structure, it is the steel construction to connect longeron (11c), it locates to connect longeron (11c) front longitudinal beam (11a) with the outside of back longeron (11 b).

2. The vehicle rear floor frame structure according to claim 1, characterized in that the side members (11) and the cross members (12) are joined by hot-melt self-tapping drill-rivet.

3. The vehicle rear floor frame structure according to claim 1, characterized in that the front side member (11a) is an "i" shaped cast aluminum structure, the rear side member (11b) is a closed cavity extruded aluminum structure, the connecting side member (11c) is an L-shaped stamped steel structure, and the front side member (11a) and the rear side member (11b) are connected to the connecting side member (11c) by self piercing riveting and hot melt self tapping drill riveting.

4. The vehicle rear floor frame structure according to claim 3, characterized in that the cross member (12) includes a first cross member (12a) and a second cross member (12b) provided at a junction of the front side member (11a) and the connecting side member (11c), and a third cross member (12c) provided at a junction of the rear side member (11b) and the connecting side member (11c), the first cross member (12a), the second cross member (12b), and the third cross member (12c) are closed cavity structures formed by extruded aluminum, and the second cross member (12b) is tower-connected with the first cross member (12a) and forms a closed force transmission cavity structure together with the front side member (11a) and the connecting side member (11 c).

5. The vehicle rear floor frame structure according to claim 4, wherein the first cross member (12a) includes first side plates (12c) disposed in opposition and a second side plate (12d) disposed perpendicularly between the first side plates (12c) to form a parallelogram closed chamber; the second cross beam (12b) comprises third side plates (12e) arranged oppositely and a fourth side plate (12f) obliquely arranged between the third side plates (12e) to form a square closed cavity, a first tower connecting plate (121) formed by extending outwards is arranged at the joint of the third side plate (12e) and the fourth side plate (12f), and a second tower connecting plate (122) connected with the first tower connecting plate (121) in a tower manner is arranged at the joint of the first side plate (12c) and the second side plate (12 d); the first cross beam (12a) is provided with a fourth tower connecting plate (124) opposite to the second tower connecting plate (122), the second cross beam (12b) is provided with a third tower connecting plate (123) opposite to the first tower connecting plate (121), and a force transmission channel with a Z-shaped trend is formed jointly through the square closed cavity, the parallelogram closed cavity, the third tower connecting plate (123), the fourth tower connecting plate (124) and the longitudinal beam (11) in a splicing and welding mode.

6. The vehicle rear floor frame structure according to claim 5, characterized in that the first side plate (12c) and the third side plate (12e) are arranged horizontally, the first tower plate (121) is extended outward from the tip of the fourth side plate (12f), the first tower plate (121) is parallel to the second tower plate (122), the third tower plate (123) is extended outward from the third side plate (12e), and the fourth tower plate (124) is extended outward from the tip of the first side plate (12 c).

7. The vehicle rear floor frame structure according to claim 4 or 5, characterized in that a sub-frame mounting point (125) is formed on the front side member (11a), a battery mounting point (126) is formed on the first cross member (12a), and a seat mounting point (127) is formed on the second cross member (12 b).

8. The vehicle rear floor frame structure according to claim 1, wherein a side wall connecting plate (13) for connecting a side wall wheel house reinforcing beam of the vehicle is provided near a junction of the rear side member (11b) and the third cross member (12c), and the side wall connecting plate (13) is located at a lower portion of a rear bumper region of the vehicle.

9. The vehicle rear floor frame structure according to claim 1, further comprising a floor panel (14) provided between the side members (11) and the cross member (12), the floor panel (14) being a planar-structured aluminum alloy structure.

10. A vehicle characterized by comprising the vehicle rear floor frame structure of any one of claims 1 to 9.

Technical Field

The invention relates to the field of vehicle bodies, in particular to a vehicle rear floor frame structure and a vehicle with the same.

Background

The frame structure of the rear floor of the main stream of the current vehicle-type body-in-white is formed by splicing and welding steel parts, the rear floor structure generally comprises a plurality of steel stamping parts, the number of the parts is large, the structure is complex, and the welding precision of the assembly is not high; the steel frame structure needs to add parts at the rear longitudinal beam frame of the vehicle body to improve the rigidity and the strength of the joint, fully fills the installation of the foot bottom disc part and ensures the performance of the rear end, so that the key points of good material selection and proper structural design are particularly realized.

Disclosure of Invention

In view of the above, it is desirable to provide a vehicle rear floor frame structure and a vehicle having the same that can solve the above various problems.

The invention provides a vehicle rear floor frame structure which comprises longitudinal beams arranged on two sides of a vehicle and a cross beam arranged between the longitudinal beams, wherein each longitudinal beam comprises a front longitudinal beam, a rear longitudinal beam fixedly connected to the rear end of the front longitudinal beam and a connecting longitudinal beam used for being assembled with an upper vehicle body of the vehicle, the front longitudinal beam, the rear longitudinal beam and the cross beam are of aluminum structures, the connecting longitudinal beam is of a steel structure, and the connecting longitudinal beam is arranged on the outer sides of the front longitudinal beam and the rear longitudinal beam.

In one embodiment, the longitudinal beam and the transverse beam are connected through hot melting self-tapping drill-rivet.

In one embodiment, the front longitudinal beam is an I-shaped cast aluminum structure, the rear longitudinal beam is a closed cavity type extruded aluminum structure, the connecting longitudinal beam is an L-shaped steel stamping structure, and the front longitudinal beam and the rear longitudinal beam are connected to the connecting longitudinal beam through self-piercing riveting and hot-melt self-tapping drilling riveting.

In one embodiment, the cross beam comprises a first cross beam and a second cross beam which are arranged at the joint of the front longitudinal beam and the connecting longitudinal beam, and a third cross beam which is arranged at the joint of the rear longitudinal beam and the connecting longitudinal beam, the first cross beam, the second cross beam and the third cross beam are closed cavity structures formed by extruded aluminum, and the second cross beam is tower-connected with the first cross beam and forms a closed force transmission cavity structure together with the front longitudinal beam and the connecting longitudinal beam.

In one embodiment, the first beam comprises a first side plate and a second side plate, wherein the first side plate is arranged oppositely, and the second side plate is vertically arranged between the first side plates to form a parallelogram closed cavity; the second cross beam comprises a third side plate and a fourth side plate, wherein the third side plate is arranged oppositely, the fourth side plate is obliquely arranged between the third side plates to form a square closed cavity, a first tower connecting plate formed by extending outwards is arranged at the joint of the third side plate and the fourth side plate, and a second tower connecting plate connected with the first tower connecting plate in a tower manner is arranged at the joint of the first side plate and the second side plate; the first cross beam is provided with a fourth tower connecting plate opposite to the second tower connecting plate, the second cross beam is provided with a third tower connecting plate opposite to the first tower connecting plate, and a force transmission channel with a Z-shaped trend is formed jointly through the splicing welding of the square closed cavity, the parallelogram closed cavity, the third tower connecting plate, the fourth tower connecting plate and the longitudinal beam.

In one embodiment, the first side plate and the third side plate are horizontally arranged, the first tower connecting plate is formed by extending the end of the fourth side plate outwards, the first tower connecting plate is parallel to the second tower connecting plate, the third tower connecting plate is formed by extending the third side plate outwards, and the fourth tower connecting plate is formed by extending the end of the first side plate outwards.

In one embodiment, a subframe mounting point is formed on the front side member, a battery mounting point is formed on the first cross member, and a seat mounting point is formed on the second cross member.

In one embodiment, a side wall connecting plate for connecting a side wall wheel cover reinforcing beam of the vehicle is arranged near the connection position of the rear longitudinal beam and the third cross beam, and the side wall connecting plate is positioned at the lower part of the rear shock absorber area of the vehicle.

In one embodiment, the vehicle rear floor frame structure further includes a floor disposed between the longitudinal beam and the cross beam, and the floor is an aluminum alloy structure having a planar structure.

The invention also provides a vehicle which comprises the vehicle rear floor frame structure.

In conclusion, the front longitudinal beam, the rear longitudinal beam and the cross beam are made of aluminum sheet metal parts, the connecting longitudinal beams are made of steel sheet metal parts, and meanwhile, the connecting longitudinal beams are additionally arranged to effectively connect the upper vehicle body of the vehicle and the front floor frame structure of the vehicle, so that the structural strength and rigidity of the rear frame of the vehicle body are ensured; meanwhile, the problem that the steel car body is overweight is solved, and the light-weight design of the car body is reflected.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a rear floor frame structure of a vehicle according to the present invention;

FIG. 2 is a schematic structural view of the connection of the side wall connecting plate of FIG. 1 with the front longitudinal beam, the rear longitudinal beam and the connecting longitudinal beam;

FIG. 3 is a schematic structural view of the first beam of FIG. 1;

FIG. 4 is a schematic structural view of the second cross member of FIG. 1;

FIG. 5 is a schematic structural view of the third beam of FIG. 1; FIG. 6 is a schematic structural view of the rear floor frame structure of the vehicle of FIG. 1 along the front and rear side rails;

fig. 7 is a schematic structural view of the first cross member formed with a battery mounting point.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 to 7, the present invention provides a vehicle rear floor frame structure, which includes longitudinal beams 11 provided at both sides of a vehicle and a lateral beam 12 provided between the longitudinal beams 11, and the longitudinal beams 11 and the lateral beam 12 are connected by hot-melt self-tapping drill-rivet (FDS) to form the vehicle rear floor frame structure.

As shown in fig. 1 and 2, the longitudinal beams 11 include a front longitudinal beam 11a, a rear longitudinal beam 11b fixed to a rear end of the front longitudinal beam 11a, and a connecting longitudinal beam 11c provided outside the front longitudinal beam 11a and the rear longitudinal beam 11b, the front longitudinal beam 11a, the rear longitudinal beam 11b, and the cross beam 12 are aluminum structures, and the connecting longitudinal beam 11c is a steel structure.

The front longitudinal beam 11a is of an I-shaped cast aluminum structure, so that the problem of material utilization rate of the design of stamping parts does not need to be considered; and the two sides of the front longitudinal beam 11a are hollowed out, so that higher bending resistance is provided, and the optimal weight reduction effect can be achieved. The rear longitudinal beam 11b is of a closed cavity type extruded aluminum structure, namely the main frame of the invention adopts extruded aluminum, the section design is flexible, the integration level of parts is high, the number is small, the weight of the vehicle is effectively reduced, and the optimal utilization of materials and space is realized based on different performances; the method has the advantages that the number and the weight of structural parts are effectively reduced and the splicing precision of the rear floor frame structure of the vehicle is improved by adopting an aluminum alloy extrusion process and an aluminum alloy casting process.

More specifically, the connecting longitudinal beam 11c is of an L-shaped steel stamping plate structure connected with the upper vehicle body of the vehicle steel vehicle body in a spot welding mode, the front longitudinal beam 11a and the rear longitudinal beam 11b are connected to the connecting longitudinal beam 11c through self-piercing riveting (SPR) and hot-melt self-tapping drilling riveting (FDS), the connection of the upper vehicle body (steel-aluminum hybrid vehicle body) made of steel is met, the upper vehicle body of the vehicle and the frame structure of the front floor of the vehicle are effectively connected, and the structural strength and the rigidity of the rear frame of the vehicle body are guaranteed; meanwhile, the problem that the steel car body is overweight is solved, and the light-weight design of the car body is reflected. In a preferred embodiment, the connecting side member 11c extends away from the ends of the front and rear side members 11a, 11b in the direction of the upper body of the vehicle (see fig. 1 and 2 for greater emphasis).

Specifically, when the longitudinal beam 11 and the transverse beam 12 are connected with each component on the vehicle body, if the two connecting pieces are connected by an aluminum-aluminum or aluminum-steel structure, the connection mode can also be selected from aluminum spot welding, or screw connection, or structural adhesive combined self-tapping drilling riveting (FDS), or structural adhesive combined self-piercing riveting (SPR).

As shown in fig. 2 to 5, the cross member 12 includes a first cross member 12a and a second cross member 12b provided at the joint of the front longitudinal member 11a and the connecting longitudinal member 11c, and a third cross member 12c provided at the joint of the rear longitudinal member 11b and the connecting longitudinal member 11c, the cross member 12 (the first cross member 12a, the second cross member 12b, and the third cross member 12c) is an extruded aluminum structure of a closed cavity structure, and the second cross beam 12b is positioned between the first cross beam 12a and the second cross beam 12b, the front longitudinal beam 11a of the cast aluminum structure is lapped with the first cross beam 12a and the second cross beam 12b of the extruded aluminum structure to form a closed type power transmission cavity structure, the structure has high integration level and high precision, reduces the weight of parts, reduces the manufacturing cost, ensures that the rear floor frame has higher rigidity, better resists the torsion and manufacturability of the vehicle body, and solves the problem that the steel vehicle body is easy to corrode.

Referring now to fig. 3, 4, 5 and 6, the third beam 12c is a square closed cavity structure; the first beam 12a comprises a first side plate 12c arranged oppositely and a second side plate 12d vertically arranged between the first side plates 11 to form a parallelogram closed cavity; the second beam 12b comprises a third side plate 12e and a fourth side plate 12f, wherein the third side plate 12e is arranged oppositely, the fourth side plate 12f is obliquely arranged between the third side plates 12e to form a square closed cavity, a first tower connecting plate 121 formed by extending outwards is arranged at the joint of the third side plate 12e and the fourth side plate 12f, and a second tower connecting plate 122 connected with the first tower connecting plate 121 in a tower manner is arranged at the joint of the first side plate 12c and the second side plate 12 d; the first cross beam 12a is provided with a fourth tower connecting plate 124 opposite to the second tower connecting plate 122, the second cross beam 12b is provided with a third tower connecting plate 123 opposite to the first tower connecting plate 121, and the force transmission channel with a Z-shaped trend is formed by splicing and welding the square closed cavity, the parallelogram closed cavity, the third tower connecting plate 123 and the fourth tower connecting plate 124 with the longitudinal beam 11 (mainly the front longitudinal beam 11a and the connecting longitudinal beam 11c) together, so that the collision force can be transmitted to the first cross beam 12a and the second cross beam 12b through the front longitudinal beam 11a, and the impact of the collision force on a rear floor frame of the vehicle can be effectively dispersed.

In a preferred embodiment, the first side plate 12c and the third side plate 12e are horizontally arranged, the first tower connecting plate 121 is formed by extending the end of the fourth side plate 12f outwards, the first tower connecting plate 121 is parallel to the second tower connecting plate 122, the third tower connecting plate 123 is formed by extending the third side plate 12e outwards, and the fourth tower connecting plate 124 is formed by extending the end of the first side plate 12c outwards, so that the transmission of the collision force by the channel formed by the tower connection of the first beam 12a and the second beam 12b is more direct and effective. In other embodiments, the first side panel 12c is not limited to the position in fig. 3, and its position may also be interchanged with the second side panel 12 d.

With particular reference to fig. 6, a subframe mounting point 125 facing the subframe of the vehicle is formed on the front longitudinal beam 11a, and the subframe mounting point 125 provided by the present invention corresponds to a force transmission channel of a closed force transmission cavity structure formed by the first cross beam 12a and the second cross beam 12b, so as to improve the strength (rigidity) of the subframe mounting point 125; meanwhile, referring to fig. 2 and 7, the present invention provides that the battery mounting point 126 is formed on the first cross member 12a, and the seat mounting point 127 is formed on the second cross member 12b, ensuring that the battery mounting point 126 and the seat mounting point 127 have higher rigidity.

In the invention, a side wall connecting plate 13 for connecting a side wall wheel cover reinforcing beam of a vehicle is arranged near the connection part of the third cross beam 12c and the rear longitudinal beam 11b, the side wall connecting plate 13 is positioned at the lower part of a rear shock absorber area of the vehicle (near one end of the connecting longitudinal beam 11c close to the third cross beam 12c in fig. 1 and in front of the connection part of the rear longitudinal beam 11b and the third cross beam 12c in fig. 2), and the side wall connecting plate 13 is of a steel pressing plate structure formed by steel stamping. In a specific embodiment, the side wall connecting plate 13 is arranged on the same side of the rear longitudinal beam 11c as the connecting longitudinal beam 11c, the side wall connecting plate 13 is connected with the rear longitudinal beam 11b through bolts, and the side wall connecting plate 13 is correspondingly assembled and connected with the side wall wheel cover reinforcing beam to form the capacity of resisting the reverse deformation transmitted by the shock absorber.

Further, the vehicle rear floor frame structure further includes a floor 14 provided between the side members 11 and the cross member 12. In the invention, the floor 14 is an aluminum alloy aluminum plate structure with a plane structure, the rear periphery of the vehicle is a steel structure, and a better force transmission path is formed by the design of a continuous casting structure.

The invention also provides a vehicle which comprises the vehicle rear floor frame structure. For the specific content of the connection between the rear floor frame structure and the vehicle, reference may be made to the prior art, which is not described herein in detail.

In the invention, when a vehicle with a vehicle rear floor frame structure collides at the rear, collision force is transmitted from the rear longitudinal beam to the front longitudinal beam, and a part of the force is transmitted upwards through the floor side wall connecting bracket.

When a vehicle with a vehicle rear floor frame structure collides at a side surface, collision force is transmitted from a vehicle rocker to a front side member, a first cross member, and a second cross member.

In conclusion, the front longitudinal beam, the rear longitudinal beam and the cross beam are made of aluminum sheet metal parts, the connecting longitudinal beams are made of steel sheet metal parts, and meanwhile, the connecting longitudinal beams are additionally arranged to effectively connect the upper vehicle body of the vehicle and the front floor frame structure of the vehicle, so that the structural strength and rigidity of the rear frame of the vehicle body are ensured; meanwhile, the problem that the steel car body is overweight is solved, and the light-weight design of the car body is reflected; meanwhile, the front longitudinal beam is of a cast aluminum structure, the cross beams and the rear longitudinal beam are of an aluminum alloy extrusion structure with a closed cavity, and the first cross beam and the second cross beam are connected in a tower mode to form a better force transmission path, so that the number and weight of parts are effectively reduced through an extrusion process and a casting process, and the structural strength/rigidity of the rear floor is improved; and the integral assembly of the vehicle rear floor frame structure meeting the light weight level is completed through the connection mode of self-piercing riveting (SPR) and hot-melt self-tapping drilling riveting (FDS).

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.