CN220809579U - Rear floor beam assembly and vehicle - Google Patents

Abstract

The application relates to the technical field of vehicles, solves the problems that the rear space of the existing rear floor beam frame structure is limited and can not adapt to the installation of a larger motor and a larger suspension structure, and provides a rear floor beam assembly and a vehicle, wherein the rear floor beam assembly comprises a floor beam main body, and the floor beam main body comprises a front cross beam, a rear cross beam and two longitudinal beams; the front mounting structure is arranged at the joint of the front cross beam and the longitudinal beam, and the rear mounting structure is arranged at the joint of the rear cross beam and the longitudinal beam. The application has the beneficial effects that: the front mounting structure and the rear mounting structure of the suspension are separately arranged at the joint of the front cross beam and the longitudinal beam and the joint of the rear cross beam and the longitudinal beam, the front-rear span of the mounting point of the rear suspension is improved, the rear floor beam assembly can adapt to the installation of a larger suspension structure and a larger motor, the transverse support of the mounting point is increased, the reliability and the stability of the connection of the suspension structure and a vehicle body are ensured, the risk of fire accidents caused by collision of the suspension with a battery is reduced, and the safety is higher.

Description

Rear floor beam assembly and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a rear floor beam assembly capable of adapting to installation of a larger suspension and a larger motor and a vehicle.

Background

With the continuous development of the domestic automobile industry, new energy vehicles are accepted by more and more users, and compared with fuel vehicles, the new energy vehicles, particularly electric vehicles, have better driving experience, and due to the adoption of motor driving, the power output is smoother, and the motor response is faster than that of a fuel engine. In order to pursue better power performance and bring better driving experience, rear motor driving is becoming an increasingly choice for electric vehicles.

However, the existing new energy vehicle architecture is limited by grades, wheelbases, chassis systems and the like, the rear space of the vehicle body is limited, and larger suspensions and larger motors cannot be adapted, so that the vehicle driving experience is poor and the power performance is limited; the method is also unfavorable for optimizing and coordinating the layout of a rear motor, a suspension, a battery and the like on the rear floor beam of the vehicle, influences the optimization of a force transmission path of the rear floor beam, and has poor connection reliability and low strength of the rear suspension and the motor and the rear floor beam. Once the rear part of the vehicle collides, the rear motor or the rear suspension is extremely easy to directly collide with the power battery due to collision and displacement, so that the battery detonates, fire accidents are caused, and the safety risk is extremely high.

Accordingly, there is a need for an improvement in the existing rear structure for a new energy vehicle to overcome the above-described problems.

Disclosure of utility model

In order to solve the technical problems, the application provides a rear floor beam assembly and a vehicle, wherein the rear floor beam assembly comprises a floor beam main body, a front cross beam, a rear cross beam and two longitudinal beams connected to the front/rear cross beam are arranged on the floor beam main body, a rear suspension mounting point is divided into two parts and respectively arranged at the connection part of the front cross beam and the longitudinal beams and the connection part of the rear cross beam and the longitudinal beams, the front-rear span of the rear suspension mounting point is improved, the rear floor beam assembly can adapt to the installation of a larger suspension structure and a larger motor, the transverse support of the mounting point is increased, and the connection reliability of the rear suspension mounting point and the floor beam main body is improved.

In order to solve the above problems, according to one aspect of the present application, there is provided a rear floor beam assembly, including a floor beam body, a front suspension mounting structure, and a rear suspension mounting structure, wherein the floor beam body includes a front beam and a rear beam that are disposed at intervals, and two stringers that are disposed at intervals and are respectively connected to the front beam and the rear beam; the front suspension mounting structure is arranged at the joint of the front cross beam and the longitudinal beam; the suspension rear mounting structure is arranged at the joint of the rear cross beam and the longitudinal beam.

In some embodiments, the floor beam body is an integrally formed frame structure; the front cross beam, the rear cross beam and the longitudinal beams are floor beam sections which enclose the frame body structure; wherein,

Each floor beam section comprises a beam bottom plate and beam side plates which are vertically connected to two sides of the beam bottom plate, and the beam bottom plate and the beam side plates form a through groove with a U-shaped structure;

The front suspension mounting structure and the rear suspension mounting structure are both arranged in the through groove.

In some embodiments, the rear floor beam assembly further comprises a first stiffener disposed within the through slot and at a junction of the front cross beam and the side rail, and the first stiffener fixedly connects the front cross beam, the side rail, the beam bottom plate, and the beam side plate;

The first reinforcement covers the through groove to form a first cavity in the through groove, and the front suspension mounting structure is positioned in the corresponding first cavity and fixedly connected with the corresponding first reinforcement.

In some embodiments, the front suspension mounting structure comprises a front support arm mounting plate and a front mounting sleeve, wherein the front support arm mounting plate is fixedly connected to the beam bottom plate, a convex part protruding towards the top of the first chamber is arranged on the front support arm mounting plate, and the convex part forms a concave cavity towards the beam bottom plate; the front mounting sleeve is arranged on the outer side of the convex part, the bottom of the front mounting sleeve penetrates through the front support arm mounting plate and the beam bottom plate and is fixedly connected with the front support arm mounting plate and the beam bottom plate, and the top of the front mounting sleeve penetrates through the first reinforcing piece and is fixedly connected with the first reinforcing piece; the beam bottom plate is provided with front support arm mounting ports which respectively correspond to the concave cavities and are communicated with the concave cavities.

In some embodiments, the rear floor beam assembly further comprises a threshold beam disposed at the junction of the side rail and the front cross rail and fixedly connected to the first reinforcement.

In some embodiments, the rear floor beam assembly further comprises a second stiffener disposed within the through channel and on the stringers; the second reinforcement is U type, the lateral wall of second reinforcement corresponds respectively to be fixed in the beam bottom plate with the roof beam curb plate, just the front end of second reinforcement to the front cross beam with the junction of longeron extends, the rear end of second reinforcement extends to the rear cross beam with the junction of longeron, and with mounting structure fixed connection behind the suspension.

In some embodiments, the suspension rear mounting structure comprises a rear stiffener, a rear mount, and a rear mounting sleeve, wherein the rear stiffener overlies the rear end of the second stiffener and is secured to the channel; a second cavity is formed between the rear mounting piece and the through groove, and the rear mounting piece is fixedly connected with the rear reinforcing plate, the second reinforcing piece, the rear cross beam, the longitudinal beam, the beam bottom plate and the beam side plate; the rear mounting sleeve is arranged in the second cavity, the bottom of the rear mounting sleeve penetrates through the rear reinforcing plate, the second reinforcing piece and the beam bottom plate and is fixedly connected with the beam bottom plate, and the top of the rear mounting sleeve penetrates through the rear mounting piece and is fixedly connected with the rear mounting piece.

In some embodiments, the rear floor beam assembly further comprises a subframe mount disposed at a front section of the longitudinal beam connecting the front cross beam and located outside the bottom of the through slot; a third cavity is formed between the auxiliary frame mounting piece and the outer wall of the through groove, and the front end and the rear end of the auxiliary frame mounting piece are respectively connected with the first reinforcing piece and the second reinforcing piece.

In some embodiments, the stringers extend with an extension in a direction away from the rear cross-beam; the rear floor beam assembly further comprises a rear energy absorption structure, wherein the rear energy absorption structure is arranged on the end face of the extension section far away from the rear cross beam and extends in the same direction as the extension section;

The vertical distance from the midpoint of the connecting line between the rear ends of the rear energy absorption structures to the midpoint of the rear cross beam is S1, the vertical distance from the midpoint of the rear cross beam to the midpoint of the front cross beam is S2, and the following relation between S1 and S2 is satisfied: s2/s1=2.5/1 to 2.9/1.

In order to solve the above technical problem, another aspect of the present application provides a vehicle, a rear portion of which is provided with the rear floor beam assembly as described above.

The beneficial effects of the application are as follows: according to the rear floor assembly and the vehicle, the rear floor beam assembly comprises the floor beam main body, the two longitudinal beams of the floor beam main body are respectively connected with the front cross beam and the rear cross beam, the front mounting structure of the suspension is arranged at the joint of the front cross beam and the longitudinal beam, and the rear mounting structure of the suspension is arranged at the joint of the rear cross beam and the longitudinal beam.

In addition, the front/rear cross beams provide transverse support for the rear suspension mounting points, the force transmission layout of the rear suspension mounting points is optimized, the connection strength and reliability of the rear suspension and the floor beam main body are improved, when the rear part of the vehicle is collided, the rear suspension can transmit force to the front/rear cross beams of the floor beam main body through the mounting points, the risk that the rear suspension impacts a battery due to collision invasion, the battery knocks, the vehicle is ignited, and fire accidents are caused is reduced, and the safety is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art, in which:

FIG. 1 is a schematic top view of a rear floor beam assembly of the present application including a floor beam body, a front suspension mounting structure, a rear suspension mounting structure, a first reinforcement, a second reinforcement, a subframe mounting member, and a rear energy absorbing structure;

FIG. 2 is a schematic bottom view of the rear floor beam assembly of the present application;

FIG. 3 is a schematic perspective view of a rear floor beam assembly of the present application;

FIG. 4 is an enlarged schematic view of a portion of the structure of FIG. 1;

FIG. 5 is an enlarged schematic view of a portion of the floor beam body of FIG. 1;

FIG. 6 is a schematic exploded view of the front suspension mounting structure of FIG. 1;

FIG. 7 is a schematic perspective view of the second reinforcement member of FIG. 1;

FIG. 8 is a second enlarged schematic view of the partial structure of FIG. 1;

FIG. 9 is a schematic exploded view of the rear suspension mounting structure of FIG. 1;

FIG. 10 is a schematic side elevational view of the rear floor beam assembly of the present application;

Wherein: 10. floor beam body 11, front cross member 12, rear cross member 13, longitudinal beam 131, extension section 14, beam floor 141, front arm mounting opening 142, front sleeve through hole 143, rear sleeve through hole 15, beam side plate 20, front mounting structure 21, front arm mounting plate 211, boss 212, front mounting plate sleeve through hole 22, front mounting sleeve 30, rear mounting structure 31, rear reinforcement plate 311, rear reinforcement plate sleeve through hole 32, rear mounting member 321, rear mounting member flange 322, rear sleeve through hole 33, rear mounting sleeve 40, first reinforcement member flange 41, first reinforcement member flange 42, front sleeve through hole 50, threshold beam 60, second reinforcement member 601, second reinforcement member sleeve through hole 70, auxiliary frame mounting member 80, rear energy absorbing structure 81.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.

Referring to fig. 1 to 3, in one aspect of the present application, there is provided a rear floor beam assembly provided at a rear portion of a vehicle, a longitudinal direction of the vehicle being defined as a front-rear direction, a width direction of the vehicle being defined as a left-right direction, the rear floor beam assembly including a frame-type floor beam body 10 of a symmetrical structure, the floor beam body 10 including front and rear cross members 11 and 12 disposed at a front-rear lateral interval, and two longitudinal members 13 disposed symmetrically left-right, the two longitudinal members 13 being connected to left and right ends of the front and rear cross members 11 and 12, respectively.

The rear floor beam assembly further comprises a rear suspension mounting point, the rear suspension mounting point is divided into two parts, and the rear suspension mounting point comprises a suspension front mounting structure 20 and a suspension rear mounting structure 30, wherein the suspension front mounting structure 20 is respectively arranged at the joint of the front cross beam 11 and the two longitudinal beams 13, and the suspension rear mounting structure 30 is respectively arranged at the joint of the rear cross beam 12 and the two longitudinal beams 13. In actual assembly, the rear suspension of the vehicle is assembled under the floor beam main body 10 by the suspension front mounting structure 20 and the suspension rear mounting structure 30 which are separately provided. The front-back span of rear suspension mounting points is improved through the design, the rear floor beam assembly can be suitable for being provided with a larger suspension structure and a larger driving motor, and therefore overall power performance of a vehicle is improved, and driving experience of a user is improved.

In addition, the front/rear cross members provide dual lateral support for the rear suspension mounting points, optimize the force transfer layout of the rear suspension mounting points, and improve the strength and reliability of the connection of the rear suspension to the floor beam body 10. When the rear part of the vehicle is collided, the rear suspension can transmit force to the front/rear cross beam of the floor beam body 10 through the mounting point, so that the risk that the rear suspension impacts the battery due to collision intrusion, causing the battery to detonate, thereby igniting the vehicle and causing fire accident is reduced, and the safety is higher.

Referring to fig. 1 to 3, in one embodiment of the rear floor beam assembly of the present application, the floor beam body 10 is an integrally formed frame structure, preferably formed by pressing hot formed steel, and the front cross member 11, the rear cross member 12 and the side members 13 are floor beam sections enclosing the frame structure. Each floor beam section includes a beam bottom plate 14 and beam side plates 15 connected to two sides of the beam bottom plate 14, and the beam bottom plate 14 and the beam side plates 15 form a through groove (not labeled) of a U-shaped structure. The front suspension mounting structure 20 and the rear suspension mounting structure 30 are both disposed in the through slots of the U-shaped structure. In actual assembly, the through groove of the floor beam body 10 is opened toward the vehicle body side, the bottom of the through groove of the floor beam body 10 is opened toward the ground side, and the rear suspension is assembled to the bottom of the floor beam body 10 by the front suspension mounting structure 20 and the rear suspension mounting structure 30.

Most of rear floor beam frames of existing vehicles are manufactured in sections and are welded in a recombination mode, and floor beams and longitudinal beams of the rear floor beam frames are usually punched through steel plates in a single mode and fixedly connected through welding points. The structure has the advantages that more parts are needed, the probability of connection failure is higher, and the beam structure is easy to collapse and deform when collision occurs, so that the safety of passengers and the whole vehicle is threatened. Moreover, the rear arrangement space of the rear floor beam structure is limited, and the structural strength of the mounting point is not high enough, so that a rear motor and a larger suspension structure cannot be mounted.

The floor beam main body 10 of the rear floor beam assembly provided by the application is of an integrally formed frame structure, so that the number of parts of the rear floor beam frame structure can be greatly reduced, the welding and assembling procedures are simplified, and the production cost is reduced. In addition, the U-shaped structure through groove arranged on the rear floor beam assembly of the application also enables the floor beam main body 10 with an integrated structure to have higher structural strength and torsional rigidity, provides better structural support for components such as rear suspension mounting points, suspension systems, driving motors, batteries and the like, improves the overall strength and stability of the rear structure of the vehicle, greatly reduces the risk of the rear suspension displacement invasion and impact on the batteries caused by the collapse deformation of the floor beam main body 10 when the rear part of the vehicle collides, further causes the battery to explode and causes fire accidents, and further improves the safety of the new energy vehicle.

Referring to fig. 1 to 5, in one embodiment of the rear floor beam assembly of the present application, the rear floor beam assembly further includes first reinforcing members 40 disposed in the through slots and respectively located at the connection points of the front cross member 11 and the two side members 13, and each of the first reinforcing members 40 is fixedly connected to the front cross member 11, the side members 13, the beam bottom plate 14 and the beam side plates 15. The first reinforcement 40 covers the through slot in a snap-fit manner to form a first cavity (not shown) in the through slot, and the front suspension mounting structure 20 is located in the corresponding first cavity and fixedly connected to the corresponding first reinforcement 40.

The rear floor beam assembly provided by the application reinforces the joint of the front cross beam 11 and the two longitudinal beams 13 through the first reinforcement 40, also provides transverse support for the beam side plates 15 except the beam bottom plate 14, obviously improves the structural strength of the floor beam main body 10, strengthens the force transmission function of the front cross beam 11, improves the reliability and stability of the fixed connection of the front cross beam 11 and the two longitudinal beams 13, and effectively reduces the risk of the collapse deformation of the floor beam main body 10 when the rear part of a vehicle collides. In addition, the rear floor beam assembly provided by the application reinforces the front suspension mounting structure 20 through the first reinforcement 40, greatly improves the reliability and strength of connection between the front suspension mounting structure 20 and the floor beam main body 10, reduces the risk of battery explosion and further fire accidents caused by displacement and invasion of the rear suspension during rear collision of the vehicle, and has higher safety.

Referring to fig. 3 to 5, as a preferred embodiment of the rear floor beam assembly of the present application, the first reinforcing members 40 are configured as box-like structures, respectively fastened downward in the through slots, and are fixed at the junctions of the front cross member 11 and the two side members 13 by welding. A plurality of first reinforcement flanges 41 which can be supported and fixed on the corresponding beam bottom plate 14 and beam side plate 15 are respectively arranged around the first reinforcement 40, and the first reinforcement 40 is welded and fixed in the through groove of the floor beam main body 10 through the corresponding first reinforcement flanges 41 when in actual assembly, and the first cavity is formed between the first reinforcement flanges and the through groove.

It should be noted that, the structural design of the first reinforcement 40 in this embodiment is only one preferred embodiment of the present application, and the technical solution of the present application is not limited thereto, and the specific structure and shape of the first reinforcement 40 may be adaptively designed according to the actual structure and shape of the floor beam body 10.

Referring to fig. 1-6, in one embodiment of the rear floor beam assembly of the present application, each front suspension mounting structure 20 includes a front arm mounting plate 21 and a front mounting sleeve 22, wherein the front arm mounting plate 21 is located at the junction of the front cross member 11 and the longitudinal member 13 and is welded to the beam bottom plate 14 thereof, and the preferred front arm mounting plate 21 is also welded to the beam side plate 15 thereof. A convex part 211 protruding towards the top of the first chamber is arranged at the middle position of the front support arm mounting plate 21, and the convex part 211 forms a concave cavity (not shown) facing the beam bottom plate 14;

At least two front mounting sleeves 22 are correspondingly arranged on the outer side of the convex part 211 along the height direction of the vehicle, the bottoms of the front mounting sleeves 22 penetrate through the front support arm mounting plate 21 and the beam bottom plate 14 and are fixedly connected with the front support arm mounting plate, and the tops of the front mounting sleeves 22 penetrate through the first reinforcing piece 40 and are fixedly connected with the first reinforcing piece.

Front support arm mounting ports 141 which respectively correspond to the concave cavities and are communicated with the concave cavities are arranged at the corresponding positions of the beam bottom plate 14 in a matched mode; front mounting plate sleeve through holes 212 which respectively correspond to the bottoms of the front mounting sleeves 22 are arranged at the corresponding positions of the front support arm mounting plates 21; front sleeve through holes 142 corresponding to the front mounting plate sleeve through holes 212 are provided at the respective positions of the beam bottom plate 14; front sleeve through holes 42 corresponding to the tops of the front mounting sleeves 22, respectively, are provided at corresponding positions of the first reinforcement 40.

In actual assembly, the front arm mounting plate 21 is placed in the through groove at the junction of the front cross beam 11 and the longitudinal beam 13, the concave cavity thereof is aligned with the front arm mounting opening 141, the front mounting plate sleeve through hole 212 is aligned with the front sleeve through hole 142, and the front arm mounting plate 21 is welded and fixed on the beam bottom plate 14 of the floor beam body 10. The bottom of the front mounting sleeve 22 is then aligned with the front mounting plate sleeve through holes 212 and the front sleeve through holes 142, and the front mounting sleeve 22 is welded to the front arm mounting plate 21 or welded to the beam bottom plate 14 simultaneously in a three-layer welding manner. Then the first reinforcement 40 is fastened to the through groove at the joint of the front cross beam 11 and the longitudinal beam 13, the front sleeve through hole 42 is correspondingly sleeved on the top of the front mounting sleeve 22, finally the first reinforcement flange 41 of the first reinforcement 40 is welded and fixed with the corresponding beam bottom plate 14 and the beam side plate 15 in a three-layer welding mode, and the front sleeve through hole 42 is welded and fixed with the top of the front mounting sleeve 22.

As one preferred embodiment of the rear floor beam assembly of the present application, the at least one first reinforcement flange 41 of the first reinforcement 40 abuts against the periphery of the front support arm mounting plate 21 and is welded and fixed with the front support arm mounting plate 21 and the beam bottom plate 14 by means of three-layer welding, thereby fixedly connecting the first reinforcement 40 with the front support arm mounting plate 21 and the beam bottom plate 14, further improving the structural strength of the first reinforcement 40 and the reliability of the connection of the front support arm mounting plate 21 with the floor beam main body 10.

After assembly, the first reinforcing member 40 can be fixedly connected with the floor beam main body 10 and the front suspension mounting structure 20 simultaneously, so that the dual reinforcement effect is achieved, the structural strength of the floor beam main body 10 is enhanced, the strength and reliability of the connection between the front suspension mounting structure 20 and the floor beam main body 10 are improved, the force transmission path of the floor beam main body 10 can be optimized, the effect of promoting the longitudinal beam 13 to be stressed and conducted to the front cross beam 11 is achieved, and the risk of the longitudinal beam 13 of the floor beam main body 10 collapsing and deforming during rear collision of a vehicle is remarkably reduced.

Referring to fig. 1, 3 and 4, in one embodiment of the rear floor beam assembly of the present application, the rear floor beam assembly further includes a threshold beam 50, the threshold beam 50 is disposed at the outer side of the junction of the two longitudinal beams 13 and the front cross beam 11, and the corresponding first reinforcement flanges 41 of the first reinforcements 40 are abutted against the threshold beam 50 and welded to the threshold beam 50 and the floor beam body 10 by three-layer welding, thereby increasing the lateral support of the threshold beam 50 and enabling the threshold beam 50 to establish a force transmission path with the longitudinal beams 13 and the front cross beam 11 through the first reinforcements 40. The structural design further strengthens the strength of the joints of the longitudinal beam 13, the front cross beam 11 and the threshold beam 50, and optimizes the force transmission path of the rear floor beam frame structure. When the rear part of the vehicle collides, the longitudinal/lateral impact force born by the longitudinal beams 13 can be dispersed and conducted to the front cross beam 11 and the threshold beam 50 through the first reinforcing member 40, so that the risk of the collapse deformation of the floor beam main body 10 is greatly reduced, the intrusion amount and the intrusion speed of the rear door of the vehicle during side collision are reduced, and the safety of the vehicle is further improved.

Referring to fig. 1 and 7, in one embodiment of the rear floor beam assembly of the present application, the rear floor beam assembly further includes a second reinforcement 60, and the second reinforcement 60 is disposed in the through-slot of the floor beam body 10 and is located on the two stringers 13, respectively.

Each second reinforcement 60 has a U-shaped cross section, is configured to extend along the extending direction of the longitudinal beam 13, and can be fitted into the through groove of the floor beam body 10, so that the side walls of the second reinforcement 60 can be respectively abutted and welded to the inner side walls of the beam bottom plate 14 and the beam side plate 15.

Meanwhile, the front end of each second reinforcement 60 extends to the junction of the front cross member 11 and the longitudinal beam 13, and the rear end of each second reinforcement 60 extends to the junction of the rear cross member 12 and the longitudinal beam 13 and is fixedly connected with the suspension rear mounting structure 30.

The second reinforcing piece 60 on the rear floor beam assembly extends along the extending direction of the longitudinal beam 13, can cover the section of the longitudinal beam 13 to the greatest extent and perform structural reinforcement, strengthens the longitudinal support of the longitudinal beam 13, further improves the structural strength and torsional rigidity of the floor beam main body 10, and reduces the risk of collapse deformation of the floor beam main body 10 caused by collision. In addition, the rear end of the second reinforcing member 60 extends to be fixedly connected with the rear suspension mounting structure 30, so that the effects of reinforcing the strength of the rear suspension mounting structure 30 and improving the connection strength and reliability between the rear suspension mounting structure 30 and the floor beam main body 10 can be achieved, additional lateral support is provided for the rear cross beam 12, and the structural strength of the connection part of the rear cross beam 12 and the longitudinal beam 13 is enhanced.

Referring to fig. 1, 3, and 7 to 9, in one embodiment of the rear floor beam assembly of the present application, each suspension rear mounting structure 30 includes a rear reinforcement 31, a rear mounting member 32, and a rear mounting sleeve 33, wherein the rear reinforcement 31 is covered on a rear end of the second reinforcement 60 extending to a connection position of the rear cross member 12 and the longitudinal beam 13, and is welded and fixed in a through groove of the connection position of the rear cross member 12 and the longitudinal beam 13.

The rear mounting piece 32 is fastened in the through groove at the joint of the rear cross beam 12 and the longitudinal beam 13, a second cavity (not labeled) is formed between the rear mounting piece 32 and the through groove, and the rear mounting piece 32 is fixedly connected with the rear reinforcing plate 31, the second reinforcing piece 60, the rear cross beam 12, the longitudinal beam 13, the beam bottom plate 14 and the beam side plate 15.

Referring to fig. 8 to 9, as a preferred embodiment of the rear floor beam assembly of the present application, the rear mounting members 32 are configured as box-like structures, respectively fastened downward in the through slots, and are fixed at the junctions of the rear cross member 12 and the two side members 13 by welding. A plurality of rear mounting piece flanges 321 which can be supported and fixed on the rear end of the corresponding rear reinforcing plate 31 and the second reinforcing piece 60, the beam bottom plate 14 and the beam side plate 15 are respectively arranged around the rear mounting piece 32, and the rear mounting piece 32 is welded and fixed in the through groove of the floor beam main body 10 through the corresponding rear mounting piece flanges 321 when in actual assembly, and the second chamber is formed between the rear mounting piece flanges and the through groove.

At least one rear mounting sleeve 33 is disposed in the second chamber along the vehicle height direction, and the bottom of the rear mounting sleeve 33 penetrates the rear reinforcing plate 31, the rear end of the second reinforcing member 60, and the beam bottom plate 14 and is fixedly connected therewith, and the top of the rear mounting sleeve 33 penetrates the rear mounting member 32 and is fixedly connected therewith.

In cooperation, rear stiffener sleeve through holes 311 corresponding to the bottoms of the rear mounting sleeves 33 are arranged at the corresponding positions of the rear stiffener 31; second reinforcement sleeve through holes 601 corresponding to the rear reinforcement sleeve through holes 311 respectively are provided at the corresponding positions of the rear ends of the second reinforcement 60; rear sleeve through holes 143 corresponding to the second reinforcement sleeve through holes 601, respectively, are provided at the respective positions of the beam bottom plate 14; rear sleeve through holes 322 corresponding to the tops of the rear mounting sleeves 33, respectively, are provided at the corresponding positions of the rear mounting members 32.

In actual assembly, the rear stiffener 31 is placed on the rear end of the second stiffener 60 extending to the junction of the rear cross member 12 and the side member 13 such that the rear stiffener sleeve through hole 311 is aligned with the second stiffener sleeve through hole 601 and the rear sleeve through hole 143, and then the rear stiffener 31 is welded and fixed to the second stiffener 60 and the floor beam main body 10. Then, the bottom of the rear mounting sleeve 33 is aligned with the rear stiffener sleeve through hole 311, and the rear mounting sleeve 33 is welded and fixed to the rear stiffener 31, or the rear mounting sleeve 33 is welded and fixed to the rear stiffener 31 and the beam bottom plate 14 simultaneously by three-layer welding. Then the rear mounting piece 32 is fastened in the through groove at the joint of the rear cross beam 12 and the longitudinal beam 13, the rear sleeve through hole 322 is correspondingly sleeved on the top of the rear mounting sleeve 33, finally the rear mounting piece flanging 321 of the rear mounting piece 32 is welded and fixed with the rear end of the corresponding rear reinforcing plate 31, the rear end of the second reinforcing piece 60, the beam bottom plate 14 and the beam side plate 15 in a multi-layer welding mode, and the rear sleeve through hole 322 is welded and fixed with the top of the rear mounting sleeve 33.

The rear reinforcement plate 31 and the rear end of the second reinforcement 60 provide a bottom support for the rear mounting member 32 in a dual reinforcement manner, so that the strength of the rear mounting structure is further enhanced, the reliability of connection between the rear suspension and the floor beam main body 10 is ensured, the reliability of connection between the driving motor and the rear suspension is also improved, the risk of invasion and collision of the rear suspension and the driving motor into the battery during rear collision is reduced, and the safety is higher. Moreover, the cooperation of the rear reinforcement 31 with the second reinforcement 60 also provides additional lateral support for the rear cross member 12, further enhancing the structural strength of the rear cross member 12 at the junction with the longitudinal member 13, and further reducing the risk of crumple deformation of the floor beam body 10 during a rear collision.

Referring to fig. 2, 3 and 10, in one embodiment of the rear floor beam assembly of the present application, the rear floor beam assembly further includes subframe mounting members 70, wherein the subframe mounting members 70 are respectively disposed at front sections of the two longitudinal beams 13 connecting the front cross member 11 and are located outside the bottoms of the through slots.

The subframe mounting member 70 is configured as a box structure, is fastened upward to the front sections of the front cross members 11 connected to the side members 13, and has a third chamber (not shown) formed between the outer walls of the through-slots, and the front and rear ends of the subframe mounting member 70 are connected to the first and second reinforcing members 40 and 60, respectively.

Because the first reinforcing member 40 and the second reinforcing member 60 are fixedly connected in the through groove, and the subframe mounting member 70 is fixedly connected outside the bottom of the through groove, during actual assembly, the front end and the rear end of the subframe mounting member 70 are welded and fixed with the floor beam main body 10 and the front end of the corresponding first reinforcing member flange 41 and second reinforcing member 60 of the first reinforcing member 40 in a three-layer welding manner respectively, so that the subframe mounting member 70, the first reinforcing member 40 and the second reinforcing member 60 form an integral connection structure, and the floor beam main body 10 is longitudinally reinforced together. Compared with the prior art, the auxiliary frame mounting member 70, the first reinforcing member 40 and the second reinforcing member 60 are fixedly connected together, so that the longitudinal strength of the floor beam main body 10 is further improved, the risk of collision of a rear suspension and a driving motor with a battery caused by collapse deformation of the longitudinal beam 13 during rear collision can be remarkably reduced, and the safety is higher.

Referring to fig. 1 to 3, and 10, in one embodiment of the rear floor beam assembly of the present application, each longitudinal beam 13 extends with an extension 131 away from the rear cross beam 12;

the rear floor beam assembly further comprises rear energy absorbing structures 80, and the rear energy absorbing structures 80 are respectively arranged on the end surfaces of the corresponding extension sections 131 far away from the rear cross beam 12 and extend in the same direction as the extension sections 131.

The vertical distance from the midpoint of the connection between the rear ends of the two rear energy absorbing structures 80 to the midpoint of the rear cross member 12 is S1, and the vertical distance from the midpoint of the rear cross member 12 to the midpoint of the front cross member 11 is S2, where S1 and S2 satisfy the following relationship: s2/s1=2.5/1 to 2.9/1.

As a preferred embodiment of the rear floor beam assembly of the present application, the spacing of S2 is set to be 850 mm, the spacing of S1 is set to be 316mm, and the ratio of S2 to S1 spacing is set to be 2.7. Of course, in other embodiments, the ratio of the S2 to the S1 spacing may be adjusted according to actual needs, and the ratio of S2/s1= (2.5-2.9)/1 may be satisfied.

According to the rear floor beam assembly, the longitudinal beam 13 of the floor beam main body 10 is lengthened in a mode of limiting the ratio of the space between S2 and S1, the position of the front suspension mounting structure 20 is actually moved forwards, the rear suspension mounting structure 30 is arranged at the joint of the rear cross beam 12 and the longitudinal beam 13, so that the front-rear span of a mounting point of the rear suspension is improved, a larger mounting space is increased for the rear suspension and a driving motor, the force transmission layout of the floor beam main body 10 is optimized by matching with the reinforcing structure design, the connection strength and reliability of the rear suspension and the floor beam main body 10 are improved, the risk that the rear suspension impacts a battery due to collision invasion, and the battery knocks, ignites vehicles and causes fire accidents is obviously reduced, and the safety is higher.

Referring to fig. 10, in one embodiment of the rear floor beam assembly of the present application, the rear energy absorbing structures 80 are individually formed by stamping using cold rolled steel plates and are connected to the extension sections 131 through welding points, and a plurality of transversely surrounding guiding grooves 81 are provided on both sides of each rear energy absorbing structure 80, so that the rear energy absorbing structures 80 can collapse along the longitudinal beams 13 under the guidance of the guiding grooves 81 during the longitudinal collision, thereby absorbing the collision force applied by the longitudinal beams 13 and reducing the risk of the longitudinal collapse deformation of the floor beam main body 10. And the rear energy-absorbing structure 80 is punched independently, and the welding spot connection mode is convenient for disassembling and replacing after the rear energy-absorbing structure is collapsed, so that the subsequent maintenance cost is reduced.

In another aspect of the present application, a vehicle (not shown) is provided with the rear floor beam assembly above at the rear of the vehicle, so that the vehicle can be assembled with a larger suspension and a driving motor, thereby improving the overall power performance of the vehicle and improving the driving experience of the user. Moreover, when the vehicle equipped with the rear floor beam assembly collides with the rear part, the floor beam main body 10 can bear larger impact force without collapsing deformation, so that the risks that the rear suspension and the driving motor invade and collide with the battery to further cause the explosion of the battery and ignite the vehicle are obviously reduced, and the safety of the vehicle is further improved.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A rear floor beam assembly, comprising:

The floor beam comprises a floor beam body (10), wherein the floor beam body (10) comprises a front cross beam (11) and a rear cross beam (12) which are arranged at intervals, and two longitudinal beams (13), wherein the longitudinal beams (13) are arranged at intervals and are respectively connected with the front cross beam (11) and the rear cross beam (12);

A front suspension mounting structure (20) arranged at the joint of the front cross beam (11) and the longitudinal beam (13);

And the suspension rear mounting structure (30) is arranged at the joint of the rear cross beam (12) and the longitudinal beam (13).

2. The rear floor beam assembly according to claim 1, wherein the floor beam body (10) is an integrally formed frame structure;

The front cross beam (11), the rear cross beam (12) and the longitudinal beams (13) are floor beam sections which enclose the frame body structure; wherein,

Each floor beam section comprises a beam bottom plate (14) and beam side plates (15) vertically connected to two sides of the beam bottom plate (14), and the beam bottom plate (14) and the beam side plates (15) form a through groove with a U-shaped structure;

The front suspension mounting structure (20) and the rear suspension mounting structure (30) are both arranged in the through groove.

3. The rear floor beam assembly of claim 2, further comprising:

The first reinforcement (40) is arranged in the through groove and positioned at the joint of the front cross beam (11) and the longitudinal beam (13), and the first reinforcement (40) is fixedly connected with the front cross beam (11), the longitudinal beam (13), the beam bottom plate (14) and the beam side plate (15);

The first reinforcement (40) covers the through groove to form a first chamber in the through groove, and the front suspension mounting structure (20) is positioned in the corresponding first chamber and fixedly connected with the corresponding first reinforcement (40).

4. A rear floor beam assembly according to claim 3, wherein the front suspension mounting structure (20) comprises:

The front support arm mounting plate (21), the front support arm mounting plate (21) is fixedly connected to the beam bottom plate (14), a convex part protruding towards the top of the first cavity is arranged on the front support arm mounting plate (21), and the convex part forms a concave cavity towards the beam bottom plate (14);

The front mounting sleeve (22) is arranged outside the convex part, the bottom of the front mounting sleeve (22) penetrates through the front support arm mounting plate (21) and the beam bottom plate (14) and is fixedly connected with the front support arm mounting plate, and the top of the front mounting sleeve (22) penetrates through the first reinforcing piece (40) and is fixedly connected with the first reinforcing piece;

The beam bottom plate (14) is provided with front support arm mounting ports (141) which respectively correspond to the concave cavities and are communicated with the concave cavities.

5. The rear floor beam assembly of claim 3, further comprising:

The threshold beam (50) is arranged at the joint of the longitudinal beam (13) and the front cross beam (11) and is fixedly connected with the first reinforcement (40).

6. The rear floor beam assembly of claim 3, further comprising:

A second reinforcement (60), the second reinforcement (60) being arranged in the through-slot and on the longitudinal beam (13);

The second reinforcement (60) is U-shaped, the lateral wall of second reinforcement (60) corresponds respectively to be fixed in beam bottom plate (14) with roof beam curb plate (15), just the front end of second reinforcement (60) to front cross beam (11) with the junction of longeron (13) extends, the rear end of second reinforcement (60) extends to rear cross beam (12) with the junction of longeron (13), and with mounting structure (30) fixed connection behind the suspension.

7. The rear floor beam assembly of claim 6, wherein said suspension rear mounting structure (30) comprises:

A rear reinforcing plate (31), wherein the rear reinforcing plate (31) is covered on the rear end of the second reinforcing piece (60) and is fixed on the through groove;

The rear mounting piece (32), a second cavity is formed between the rear mounting piece (32) and the through groove, and the rear mounting piece (32) is fixedly connected with the rear reinforcing plate (31), the second reinforcing piece (60), the rear cross beam (12), the longitudinal beam (13), the beam bottom plate (14) and the beam side plate (15);

the rear mounting sleeve (33), the rear mounting sleeve (33) is arranged in the second cavity, the bottom of the rear mounting sleeve (33) penetrates through the rear reinforcing plate (31), the second reinforcing piece (60) and the beam bottom plate (14) and is fixedly connected with the beam bottom plate, and the top of the rear mounting sleeve (33) penetrates through the rear mounting piece (32) and is fixedly connected with the rear mounting piece.

8. The rear floor beam assembly of claim 6, further comprising:

The auxiliary frame mounting piece (70) is arranged at the front section of the longitudinal beam (13) connected with the front cross beam (11) and is positioned outside the bottom of the through groove;

A third cavity is formed between the auxiliary frame mounting piece (70) and the outer wall of the through groove, and the front end and the rear end of the auxiliary frame mounting piece (70) are respectively connected with the first reinforcing piece (40) and the second reinforcing piece (60).

9. Rear floor girder assembly according to any of the claims 1-8, wherein the longitudinal girders (13) extend with an extension (131) in a direction away from the rear cross girders;

The rear floor beam assembly further comprises a rear energy absorption structure (80), wherein the rear energy absorption structure (80) is arranged on the end face of the extension section (131) far away from the rear cross beam and extends in the same direction as the extension section (131);

The vertical distance from the midpoint of the connecting line between the rear ends of the rear energy absorption structures (80) to the midpoint of the rear cross beam (12) is S1, the vertical distance from the midpoint of the rear cross beam (12) to the midpoint of the front cross beam (11) is S2, and the following relation is satisfied between S1 and S2: s2/s1=2.5/1 to 2.9/1.

10. A vehicle, characterized in that the rear part of the vehicle is provided with a rear floor beam assembly as claimed in any one of claims 1-9.