CN212529825U - Front floor frame structure - Google Patents

Abstract

The utility model discloses a front floor frame construction, including the front floor body with set up in front floor frame on the front floor body, the front floor body includes central channel, front seat beam assembly and back seat beam assembly, two threshold inner panels and the passageway back longerons and two front floor longerons of vertical setting of front floor frame including the horizontal front floor front beam that sets up, front seat beam assembly, back seat beam assembly, the central channel with front seat beam assembly with back seat beam assembly is fixed respectively, front seat beam assembly with back seat beam assembly with front floor longeron is fixed in corresponding position department respectively. The utility model discloses a local high stress problem of preceding floor of front floor frame structure simple structure, promotion automobile body structural strength and whole car NVH performance, satisfying the safety regulation requirement, solving side impact protection passenger and battery package safety problem, solution.

Description

Front floor frame structure

Technical Field

The utility model relates to a car body technical field under the car especially relates to a preceding floor frame construction.

Background

The front floor frame structure of the conventional power vehicle type in the prior art is shown in fig. 1, because an exhaust pipe needs to be avoided, a central channel 2 is usually designed in the middle of the floor and penetrates from the position of a front cabin of an automobile to the position of a rear floor assembly, and a left central channel longitudinal beam 3, a right central channel longitudinal beam 3 and more than two floor cross beams are arranged on two sides of the central channel 2 and used for lateral support of the lower part of a front floor. When the front floor frame structure is used for a PHEV hybrid vehicle type, the PHEV hybrid vehicle type needs to reserve the space of the high-voltage battery and cancel the center channel longitudinal beams 3 on two sides of the center channel because the high-voltage battery is arranged at the bottom of the front floor, the deformation of the vehicle body is uncontrollable when the side column is collided due to insufficient rigidity and strength of the front floor frame structure, and the intrusion amount of the high-voltage battery is large due to downward deformation of the front floor when the front floor is extruded, so that the requirements of regulations are not met, and potential safety hazards exist. All need be again for mould, anchor clamps, the utensil of central channel both sides longeron part, consequently development increase development cost, and part quantity is many leads to part state management and control inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve not enough among the prior art and accomplish, the utility model aims at providing a simple structure, promote automobile body structural strength and whole car NVH performance, promote the part qualification rate, the uniformity of control part state, solve side collision protection passenger and battery package safety problem, solve the local high stress problem's of preceding floor front floor frame construction.

The utility model discloses a front floor frame structure, including front seat crossbeam subassembly and back seat crossbeam subassembly and the passageway back longeron and two front floor longerons of vertical setting that set gradually transversely from front to back, the front and back both sides of passageway back longeron are fixed with the rear side of central channel and the front side two-layer formula of back floor front beam respectively, two front floor longerons parallel arrangement in the left and right sides of central channel, the front and back both ends of front floor longeron are fixed with front girder extension beam and back floor front beam two-layer formula respectively, front girder extension beam with back floor front beam is fixed with the front and back both sides two-layer formula of threshold inner panel respectively, the threshold inner panel set up in the outside of front floor longeron, front seat crossbeam subassembly with back seat crossbeam subassembly arrange respectively the left and right sides of central channel and with central channel is fixed at the corresponding position department two-layer formula respectively, the left side and the right side of the front seat beam assembly and the left side and the right side of the rear seat beam assembly are respectively fixed with the doorsill inner plates on the left side and the right side in a two-layer mode at corresponding positions, and the front seat beam assembly, the rear seat beam assembly and the front floor longitudinal beam are respectively provided with an overlapping part and are fixed in a two-layer mode at corresponding positions of the overlapping part.

The utility model discloses a preceding floor frame construction can also be:

the rear longitudinal beam of the channel and the rear seat cross beam assembly are respectively provided with an overlapping part at the fixing part of the central channel, and the rear seat cross beam assembly, the rear longitudinal beam of the channel and the central channel are fixed in a three-layer manner at the corresponding positions of the overlapping parts.

Inner plate connecting pieces are symmetrically arranged on the outer sides of the front parts of the two front floor longitudinal beams respectively, and the front end of the doorsill inner plate is fixed with the inner plate connecting pieces in a two-layer mode.

The rear side of preceding girder extension beam transversely is provided with preceding floor front beam, the left and right sides of preceding floor front beam respectively with the left and right sides preceding girder extension beam two-layer formula is fixed.

Front floor extension beams are symmetrically and longitudinally arranged on the inner sides of the front portions of the front floor front cross beams respectively, and the front side and the rear side of each front floor extension beam are fixed with the front girder extension beams and the front floor front cross beams in a two-layer mode respectively.

The rear seat beam assembly comprises a left rear beam, a right rear beam and a beam connecting piece, the left side and the right side of the beam connecting piece are fixed with the left rear beam and the right rear beam in a two-layer mode respectively, the front side and the rear side of the beam connecting piece are fixed with the central channel and the front floor rear longitudinal beam in a two-layer mode respectively, the left side of the left rear beam and the right side of the right rear beam are fixed with the doorsill inner plate in a two-layer mode respectively, and the middle of the left rear beam and the middle of the right rear beam are fixed with the front floor longitudinal beam in a two-layer mode respectively.

The rear seat beam assembly is connected with the central channel, a beam reinforcing plate is arranged at a position corresponding to the connecting position of the rear seat beam assembly and the central channel, the front side of the beam reinforcing plate is fixed with the central channel, and the rear side of the beam reinforcing plate is fixed with the rear seat beam assembly.

The rear seat beam assembly is connected with the front floor longitudinal beam on the left side and the right side, and a second longitudinal beam extension piece is arranged at a corresponding position, integrally formed or fixed on the outer side of the front floor longitudinal beam and transversely extends along the rear seat beam assembly, and the second longitudinal beam extension piece and the rear seat beam assembly are fixed in a two-layer mode.

The front cross beam assembly comprises a left front cross beam and a right front cross beam, the left side and the right side of the left front cross beam are fixed with the doorsill inner plate and the central channel in a two-layer mode, and the left side and the right side of the right front cross beam are fixed with the central channel and the doorsill inner plate in a two-layer mode.

The front seat beam assembly is connected with the front floor longitudinal beam on the left side and the right side, and a first longitudinal beam extension piece is arranged at a corresponding position, integrally formed or fixed at the outer side of the bottom of the front floor longitudinal beam and transversely extends along the front seat beam assembly, and the top of the first longitudinal beam extension piece is fixed with the bottom of the front seat beam assembly in a two-layer mode.

The utility model discloses a front floor frame structure, including front seat crossbeam subassembly and back seat crossbeam subassembly and the passageway back longeron and two front floor longerons of vertical setting that set gradually transversely from front to back, the front and back both sides of passageway back longeron are fixed with the rear side of central channel and the front side two-layer formula of back floor front beam respectively, two front floor longerons parallel arrangement in the left and right sides of central channel, the front and back both ends of front floor longeron are fixed with front girder extension beam and back floor front beam two-layer formula respectively, front girder extension beam with back floor front beam is fixed with the front and back both sides two-layer formula of threshold inner panel respectively, the threshold inner panel set up in the outside of front floor longeron, front seat crossbeam subassembly with back seat crossbeam subassembly arrange respectively the left and right sides of central channel and with central channel is fixed at the corresponding position department two-layer formula respectively, the left side and the right side of the front seat beam assembly and the left side and the right side of the rear seat beam assembly are respectively fixed with the doorsill inner plates on the left side and the right side in a two-layer mode at corresponding positions, and the front seat beam assembly, the rear seat beam assembly and the front floor longitudinal beam are respectively provided with an overlapping part and are fixed in a two-layer mode at corresponding positions of the overlapping part. Therefore, the front seat cross beam assembly, the two front floor longitudinal beams and the rear floor front cross beam form a closed frame structure, the high-voltage battery of the PHEV hybrid vehicle type is arranged at the bottom of the closed frame structure, namely is completely accommodated in a protection space of the frame structure, the protection space provides enough protection for the high-voltage battery, no matter which direction of the vehicle body is collided, the collision force can be transmitted to two sides by the closed frame structure from the collided part, and the absorption is weakened along with the increase of the transmission distance, so that the high-voltage battery is prevented from being extruded and damaged due to the fact that the vehicle body is collided. The left side and the right side of the front seat beam assembly and the left side and the right side of the rear seat beam assembly are respectively fixed with the doorsill inner plates at the left side and the right side at corresponding positions, the middle parts of the front seat beam assembly and the rear seat beam assembly are also fixed with the central channel in a two-layer manner, the arrangement of the front seat beam assembly and the rear seat beam assembly strengthens the resistance effect of a closed frame structure to the collision of a vehicle body, when the force is transmitted to the connecting positions of the front seat beam assembly or the rear seat beam assembly and the doorsill inner plates along the frame structure no matter any part of the vehicle body is collided, part of the load originally born by the doorsill inner plates can be distributed and weakened along the front seat beam assembly or the rear seat beam assembly, namely, a force transmission path is added to the front seat beam assembly or the rear seat beam assembly, the force on each force transmission path is reduced, the probability of deformation of the beam on the frame structure when the vehicle body is collided is reduced, the high-voltage battery on the lower side of the frame structure and the passenger on the upper side are protected, the safety regulation requirements are met, and the structural strength of the vehicle body and the NVH performance of the whole vehicle are improved. The rear floor front cross beam is provided with a new force transmission path, so that the force applied to the automobile body during collision can be further transmitted and weakened in a dispersed manner when the rear longitudinal beam of the channel is transmitted to the position of the rear longitudinal beam of the channel, and the bending resistance of the frame structure during collision of the automobile body is further improved. The utility model discloses a front floor frame construction is for prior art's advantage: the structure is simple, the structural strength of the vehicle body and the NVH performance of the whole vehicle are improved, the safety regulation requirements are met, the safety problems of protecting passengers and a battery pack in side collision are solved, and the local high stress problem of the front floor is solved.

Drawings

Fig. 1 is a schematic structural diagram of a front floor frame in the prior art.

Fig. 2 is a bottom view of a front floor frame structure of the present invention.

Fig. 3 is an assembly view of a front floor frame structure and a high voltage battery of the present invention.

Fig. 4 is an enlarged view of a front floor longitudinal beam of a front floor frame structure of the present invention.

Fig. 5 is a sectional view of the front floor frame structure of the present invention, shown in fig. 2A-a.

Fig. 6 is a top view of a front floor frame structure of the present invention.

Description of the figures

1 … front floor stringer 2 … center channel 3 … center channel stringer

4 … front seat Beam Assembly 5 … rear seat Beam Assembly 6 … Right front Beam

7 … left front beam 8 … sill inner panel 9 … right rear beam

10 … left rear beam 11 … beam connector 12 … channel rear longitudinal beam

14 … Beam stiffener 15 … first rail extension 16 … second rail extension

17 … front floor front beam 18 … rear floor front beam 19 … front floor extension beam

20 … front girder extension beam 21 … inner plate connecting piece 22 … nut plate

23 … high-voltage battery 24 … bent part

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

A front floor frame structure according to the present invention will be described in further detail with reference to fig. 2 to 6 of the drawings.

The utility model discloses a front floor frame construction please refer to relevant each picture in 2 to 6, include by preceding front seat beam assembly 4 and the rear seat beam assembly 5 that transversely sets gradually after to and the passageway back longeron 12 and two front floor longerons 1 of vertical setting, the front and back both sides of passageway back longeron 12 respectively with central channel 2's rear side with the front side two-layer formula of back floor front beam 18 is fixed, two front floor longeron 1 parallel set up in central channel 2's the left and right sides, both ends are fixed with front floor extension beam 20 and back floor front beam 18 two-layer formula respectively around front floor longeron 1, front floor extension beam 20 with back floor front beam 18 is fixed with two laminar in the front and back both sides of threshold inner panel 8 respectively, threshold inner panel 8 set up in the outside of front floor longeron 1, front seat beam assembly 4 with back seat beam assembly 5 arranges respectively the left and right sides of central channel 2 And are fixed with the central channel 2 at the corresponding position in a two-layer manner respectively, the left and right sides of the front seat beam assembly 4 and the left and right sides of the rear seat beam assembly 5 are fixed with the doorsill inner plates 8 at the left and right sides at the corresponding positions respectively, the front seat beam assembly 4 and the rear seat beam assembly 5 are fixed with the front floor longitudinal beam 1 at the overlapping parts and at the corresponding positions of the overlapping parts in a two-layer manner. In this way, the front seat cross member assembly 4, the two front floor side members 1 and the rear floor front cross member 18 form a closed frame structure, the high-voltage battery 23 of the PHEV hybrid vehicle type is arranged at the bottom of the closed frame structure, that is, is completely accommodated in a protective space of the frame structure, the protective space provides sufficient protection for the high-voltage battery 23, no matter which direction of the vehicle body is collided, the collision force can be transmitted to both sides from the collided part by the closed frame structure, and the absorption is weakened along with the increase of the transmission distance, so that the high-voltage battery 23 is prevented from being extruded and damaged due to the collision of the vehicle body. The left and right sides of the front seat cross beam assembly 4 and the left and right sides of the rear seat cross beam assembly 5 are respectively fixed with the doorsill inner panels 8 at the left and right sides at corresponding positions, the middle parts of the front seat cross beam assembly 4 and the rear seat cross beam assembly 5 are also fixed with the central channel 2 in a two-layer manner, the arrangement of the front seat cross beam assembly 4 and the rear seat cross beam assembly 5 strengthens the resistance of a closed frame structure to the collision of the vehicle body, when the force is transmitted to the connecting position of the front seat cross beam assembly 4 or the rear seat cross beam assembly 5 and the doorsill inner panels 8 along the frame structure no matter the collision of any part of the vehicle body, a part of the load originally supposed to be born by the doorsill inner panels 8 can be shared and transmitted down along the front seat cross beam assembly 4 or the rear seat cross beam assembly 5 and weakened, namely, the front seat beam assembly 4 or the rear seat beam assembly 5 is additionally provided with a force transmission path, so that the force on each force transmission path is reduced, the deformation probability of the beam on the frame structure when the vehicle body is collided is reduced, the high-voltage battery 23 on the lower side of the frame structure and the passenger safety on the upper side are protected, the safety regulation requirements are met, and the structural strength of the vehicle body and the NVH performance of the whole vehicle are improved. The high-voltage battery 23 on the lower side of the frame structure is avoided, so that the central channel longitudinal beams on the two sides of the central channel 2 are cancelled, the resistance effect of the frame structure is weakened when the vehicle body is collided, in order to further increase the resistance effect of the frame structure, the channel rear longitudinal beam 12 is arranged at the rear part of the central channel 2, the front side and the rear side of the channel rear longitudinal beam 12 are respectively fixed with the rear side of the central channel 2 and the front side of the rear floor front cross beam 18 in a two-layer mode, a new force transmission path is added between the rear seat cross beam and the rear floor front cross beam 18, the force applied when the vehicle body is collided can be transmitted to the position of the channel rear longitudinal beam 12 to be further dispersed and transmitted and weakened, and the bending resistance of the frame structure when the vehicle body is collided is further. The utility model discloses a front floor frame construction is for prior art's advantage: the structure is simple, the structural strength of the vehicle body and the NVH performance of the whole vehicle are improved, the safety regulation requirements are met, the safety problems of protecting passengers and a battery pack in side collision are solved, and the local high stress problem of the front floor is solved.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: the rear longitudinal beam 12 of the channel and the rear seat cross beam assembly 5 are respectively provided with an overlapping part at the fixing position of the central channel 2, and the rear seat cross beam assembly 5, the rear longitudinal beam 12 of the channel and the central channel 2 are fixed in a three-layer manner at the corresponding positions of the overlapping parts. Thus, the central channel 2, the channel rear longitudinal beam 12 and the rear seat cross beam assembly 5 form a cross structure, the three parts are fixedly connected in a three-layer mode at the overlapping portion to form a firm connection, one part is divided into three parts when force is transmitted to the overlapping portion, load on each path is greatly weakened, the load is accelerated and weakened in the transmission process, originally, only one path weakened force is shared by three paths and weakened at the same time, when the force of each shared transmission path is converged together, the force is greatly smaller than the force directly transmitted by one path, the rear portion of the front floor is powerfully supported by the channel rear longitudinal beam 12, and the problem of high stress of the rear portion of the front floor is solved.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: the outer sides of the front parts of the two front floor longitudinal beams 1 are symmetrically provided with inner plate connecting pieces 21 respectively, and the front end of the doorsill inner plate 8 is fixed with the inner plate connecting pieces 21 in a two-layer mode. In this way, the inner plate connecting member 21 extends outward from the fixed position of the front girder extension beam 20 and the front floor side member 1, so that a certain distance is formed between the rocker inner plate 8 and the front floor side member 1, and it is further ensured that when the position of the rocker inner plate 8 is impacted, force is transmitted through a beam type structural member having a connecting portion with the rocker inner plate 8, that is, the force is reduced through more force transmission paths, instead of directly impacting the front floor side member 1 when the rocker inner plate 8 is impacted and deformed, the impact force is transmitted along the extension direction of the front floor side member 1, so that the danger that the high-voltage battery 23 is extruded when the front floor side member 1 is deformed is reduced.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: the rear side of the front girder extension beam 20 is transversely provided with a front floor front beam 17, and the left side and the right side of the front floor front beam 17 are respectively fixed with the front girder extension beam 20 on the left side and the right side in a two-layer mode. In this way, the high-voltage battery 23 of the PHEV hybrid vehicle is arranged at the bottom of the vehicle body, the central channel longitudinal beams at both sides of the central channel 2 are cancelled in order to avoid the low-voltage battery 23, so that the resistance of the frame structure in the case of a collision is weakened, in order to meet the requirements of safety regulations, the front floor front cross beam 17 is added at the front side of the central channel 2, the front and rear ends of the front floor longitudinal beam 1 are respectively fixed with the front crossbeam extension beam 20 and the rear floor front cross beam 18 in a two-layer manner, the front floor front cross beam 17 is blocked at the front part of the closed frame structure consisting of the front seat cross beam assembly 4, the two front floor longitudinal beams 1 and the rear floor front cross beam 18, when the front part of the frame structure, namely the front part of the high-voltage battery 23, the front floor cross beam 17 can sacrifice deformation or conduct force to the front floor longitudinal beams 1 at both sides, force is transmitted to the front seat cross beam assembly 4 and the rear seat cross beam assembly 5 along the front floor longitudinal beam 1 and is further dispersed and collapsed, so that the uncontrollable deformation is more controllable, and the probability that the high-voltage battery 23 is extruded is reduced. A bending part 24 is arranged in the middle of the front floor extension beam 19, the front part of the front floor extension beam 19 transversely extends from the inner side of the front girder 20 to the bending part 24, and the rear part of the front floor extension beam 19 longitudinally extends from the bending part 24 to the front side of the front floor front cross beam 17. Therefore, the front floor extension beam 19 extends from the inner side of the front girder 20 to the bending part 24 transversely and inwards, after bending and turning through the bending part 24, the front floor extension beam changes to extend longitudinally to the front side of the front floor crossbeam 17, so that the transmission distance of the force transmission path is increased, in the process of force transmission, the force is buffered and attenuated by a longer distance, the rigidity and the strength of the whole frame structure are increased when a vehicle body is collided, the original frame shape is maintained, and the high-voltage battery at the bottom of the frame structure is better protected.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: front floor extension beams 19 are symmetrically and longitudinally arranged on the inner sides of the front portions of the front floor front cross beams 17 respectively, and the front side and the rear side of each front floor extension beam 19 are fixed with the front girder extension beam 20 and the front floor front cross beam 17 in a two-layer mode. Thus, a cross-shaped structure is formed at the front side of the front floor longitudinal beam 1, and when the force borne by the vehicle body during the collision is transmitted to the front side of the front floor longitudinal beam 1, the force is transmitted continuously in three parts, namely, the force is transmitted from the front floor front cross beam 17 to the front floor extension beam 20, the rocker inner plate 8 and the front floor longitudinal beam 1, or is transmitted from the front floor extension beam 20 to the front floor front cross beam 17, the rocker inner plate 8 and the front floor longitudinal beam 1, or is transmitted from the front floor longitudinal beam 1 to the rocker inner plate 8, the front floor front cross beam 17 and the front floor extension beam 20, or is transmitted from the rocker inner plate 8 to the front floor longitudinal beam 1, the front floor cross beam 17 and the front floor extension beam 20, so that the force passing through the fixed point is greatly weakened and shared to other three plate beam type structural members, thereby increasing the rigidity and strength of the frame structure and protecting the passengers on the upper side and the high-voltage battery 23 on the lower side of the frame structure from being safely used when the vehicle body is collided.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: rear seat beam assembly 5 includes left rear frame member 10, right rear frame member 9 and crossbeam connecting piece 11, the left and right sides of crossbeam connecting piece 11 respectively with left rear frame member 10 with the two-layer formula of right rear frame member 9 is fixed, the front and back both sides of crossbeam connecting piece 11 respectively with central channel 2 with the two-layer formula of front floor back longeron is fixed, the left side of left rear frame member 10 with the right side of right rear frame member 9 respectively with 8 two-layer formulas of threshold inner panel are fixed, the middle part of left rear frame member 10 with the middle part of right rear frame member 9 is fixed with 1 two-layer formula of front floor longeron respectively. Like this, back seat beam assembly 5 has increased crossbeam connecting piece 11, crossbeam connecting piece 11 will a left side rear beam 10 with right side rear beam 9 links together and forms a run-through crossbeam, forms coherent power transmission route, and crossbeam connecting piece 11 around both sides respectively with central channel 2 with two laminar fixed of front floor back longeron form stable cross frame, will transmit through the power one minute of this intersect for three, and then strengthened the joint strength and the whole car rigidity of frame to satisfy the safety regulation requirement, high-voltage battery 23 can receive more effective protection when the automobile body side receives the post to bump. A further preferred solution is that the beam connector 11 is arranged directly behind the central channel 2. Like this, because central channel 2 just in time vertically sets up in frame construction's central point department, like this, crossbeam connecting piece 11 also transversely sets up in frame construction's central point department, left side rear frame member 10 with right side rear frame member 9 set up respectively in crossbeam connecting piece 11's the left and right sides, and then increased whole frame construction's intensity, when making the automobile body front and back both sides bump, power can the equilibrium transmit to left side rear frame member 10 with on the right rear frame member 9, and then make whole frame construction more controllable when taking place deformation.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: a cross beam reinforcing plate 14 is arranged at a position corresponding to the connection position of the rear seat cross beam assembly 5 and the central channel 2, the front side of the cross beam reinforcing plate 14 is fixed with the central channel 2, and the rear side of the cross beam reinforcing plate 14 is fixed with the rear seat cross beam assembly 5. In this way, the front side of the cross member reinforcing plate 14 is fixed to the center tunnel 2, the rear side of the cross member reinforcing plate 14 is fixed to the rear seat cross member assembly 5, and the cross member reinforcing plate 14 increases the thickness of the joint between the center tunnel 2 and the rear seat cross member assembly 5, that is, the cross sectional area where the center tunnel 2 and the rear seat cross member assembly 5 are connected increases, so that the load borne by a unit area is greatly reduced due to the increase of the cross sectional area for the same amount of force in the process of force transmission, and the rigidity and strength of the joint between the center tunnel 2 and the rear seat cross member assembly 5 are increased. A further preferred solution is to fix the rear side of the beam reinforcement plate 14 to the beam connector 11 in two layers. In this way, the beam connector 11 is located at the central position of the whole frame structure, the beam reinforcing plate 14 increases the thickness of the central channel 2 and the beam connector 11 at the joint, that is, the cross-sectional area where the central channel 2 and the beam connector 11 are connected is increased, so that in the process of force transmission, for the same force, the load born by a unit area is greatly reduced due to the increase of the cross-sectional area, and the rigidity and the strength of the central channel 2 and the beam connector 11 at the fixed position are increased.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: the rear seat cross beam assembly 5 and the positions, corresponding to the connection positions of the front floor longitudinal beam 1, on the left side and the right side of the rear seat cross beam assembly are provided with second longitudinal beam extending pieces 16, the second longitudinal beam extending pieces 16 are integrally formed or fixed on the outer side of the front floor longitudinal beam 1 and transversely extend along the rear seat cross beam assembly 5, and the second longitudinal beam extending pieces 16 and the rear seat cross beam assembly 5 are fixed in a two-layer mode. In this way, the second side rail extension 16 is integrally formed or fixed on the outer side of the bottom of the front floor side rail 1 and extends transversely along the rear seat cross member assembly 5, the second side rail extension 16 and the rear seat cross member assembly 5 form a cavity structure, the top of the second side rail extension 16 and the bottom of the rear seat cross member assembly 5 are fixed in two layers, the second side rail extension 16 increases the fixing area of the front floor side rail 1 and the rear seat cross member assembly 5 at the fixing position of the front floor side rail 1 and the rear seat cross member assembly 5, and supports up the rear seat cross member assembly 5 at the bottom thereof to bear the weight of the rear seat cross member assembly 5 together with the center tunnel 2 and the threshold inner plate 8, because the center tunnel 2 and the threshold inner plate 8 are both plate-type structural members, and the rigidity and strength thereof are much smaller than beam-type structural members, the provision of the second rail extension 16 in turn reduces the load-bearing capacity of the centre tunnel 2 and the sill inner panel 8, and thus increases the rigidity and strength of the sill inner panel 8 and the centre tunnel 2. In a further preferred embodiment, the top of the second longitudinal beam extension 16 on the left side and the bottom of the left rear cross beam 10 are fixed in two layers at corresponding positions, and the bottom of the second longitudinal beam extension 16 on the right side and the bottom of the right rear cross beam 9 are fixed in two layers at corresponding positions. Therefore, the second longitudinal beam extending pieces 16 on the left side and the right side are symmetrically distributed on two sides of the central channel 2 and are fixed with the left rear cross beam 10 and the right rear cross beam 9 in a two-layer mode respectively, a force transmission path of the whole frame structure is optimized, when the front side and the rear side of a vehicle body collide, force can be transmitted on the left rear cross beam 10 and the right rear cross beam 9 in a balanced mode, and deformation controllability of the whole frame structure is improved.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: the front cross beam assembly comprises a left front cross beam 7 and a right front cross beam 6, the left side and the right side of the left front cross beam 7 are fixed with the doorsill inner plate 8 and the central channel 2 in a two-layer mode respectively, and the left side and the right side of the right front cross beam 6 are fixed with the central channel 2 and the doorsill inner plate 8 in a two-layer mode respectively. Thus, the left front cross beam 7 is lapped between the central channel 2 and the left side inner sill plate 8, the right front cross beam 6 is lapped between the central channel 2 and the right side inner sill plate 8, namely the left front cross beam 7 forms a strong support between the central channel 2 and the left side inner sill plate 8, the right front cross beam 6 forms a strong support between the central channel 2 and the right side inner sill plate 8, the front seat cross beam assembly 4 and the rear seat cross beam assembly 5 are lapped with the two front floor longitudinal beams 1 at corresponding positions respectively, the front seat cross beam assembly 4, the rear seat cross beam assembly 5, the central channel 2, the front floor front cross beam 17 and the front floor longitudinal beams 1 form a closed structure in a shape like a Chinese character 'tian', so that the collision force of the vehicle body is greatly weakened when the force is converged together through a force transmission path of one-half and two-half parts, thereby increasing the strength and rigidity of the frame structure.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: the front seat cross beam assembly 4 is provided with a first longitudinal beam extending piece 15 at a position corresponding to the connection position of the front floor longitudinal beam 1 on the left side and the right side, the first longitudinal beam extending piece 15 is integrally formed or fixed on the outer side of the bottom of the front floor longitudinal beam 1 and transversely extends along the front seat cross beam assembly 4, and the top of the first longitudinal beam extending piece 15 is fixed with the bottom of the front seat cross beam assembly 4 in a two-layer mode. In this way, the first side member extension 15 is integrally formed or fixed on the outer side of the bottom of the front floor side member 1 and extends laterally along the front seat cross member assembly 4, the first side member extension 15 and the front seat cross member assembly 4 form a cavity structure, the top of the first side member extension 15 and the bottom of the front seat cross member assembly 4 are fixed in two layers, the first side member extension 15 increases the fixing area of the front floor side member 1 and the front seat cross member assembly 4 at the fixing position of the front floor side member 1 and the front seat cross member assembly 4, and supports up the front seat cross member assembly 4 at the bottom thereof to bear the weight of the front seat cross member assembly 4 together with the center tunnel 2 and the threshold inner plate 8, because the center tunnel 2 and the threshold inner plate 8 are both plate-type structural members, and their rigidity and strength are much smaller than beam-type structural members, the provision of the first longitudinal beam extension 15 in turn reduces the load-bearing capacity of the centre tunnel 2 and the sill inner panel 8, and thus increases the rigidity and strength of the sill inner panel 8 and the centre tunnel 2. In a further preferred embodiment, the top of the first longitudinal beam extension 15 on the left side and the bottom of the left front cross beam 7 are fixed in two layers at corresponding positions, and the bottom of the first longitudinal beam extension 15 on the right side and the bottom of the right front cross beam 6 are fixed in two layers at corresponding positions. Therefore, the first longitudinal beam extending pieces 15 on the left side and the right side are symmetrically distributed on two sides of the central channel 2 and are fixed with the left front cross beam 7 and the right front cross beam 6 in a two-layer mode respectively, a force transmission path of the whole frame structure is optimized, when the front side and the rear side of a vehicle body collide, force can be transmitted on the left front cross beam 7 and the right front cross beam 6 in a balanced mode, and deformation controllability of the whole frame structure is improved.

The utility model discloses a front floor frame structure, please refer to in fig. 2 to fig. 6 each relevant picture, can also be on the basis of preceding technical scheme: at least two nut plates 22 for installing a high-voltage battery 23 are arranged on the two front floor longitudinal beams 1 at intervals respectively, and the nut plates 22 are fixed with the front floor longitudinal beams 1 at corresponding positions in a two-layer mode respectively. In this way, the nut plate 22 detachably fixes the high-voltage battery 23 to the front floor frames 1 at a plurality of points on each side in the front, rear, left and right directions, the front floor front cross member 17 is located in front of the high-voltage battery 23, the two front floor frames 1 are respectively located on the left and right sides of the high-voltage battery 23, the rear floor front cross member 18 is located on the rear side of the high-voltage battery 23, and the whole closed frame structure protects the high-voltage battery 23 from deformation caused by vehicle body collision in the front, rear, left and right directions. The arrangement position of the nut plate 22 can be changed according to practical application, namely, the position of the nut plate 22 has no specific position and is adjusted according to the position of the installation point of the high-voltage battery 23, and if the position of the high-voltage battery 23 is adjusted, the position of the nut plate 22 is adjusted to the corresponding position along with the adjustment, as long as the requirements of safety regulations are met.

The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.

Claims (10)

1. A front floor frame structure characterized by: the front and rear sides of the channel rear longitudinal beam are respectively fixed with the rear side of a central channel and the front side of a rear floor front cross beam in a two-layer mode, the two front floor longitudinal beams are arranged on the left and right sides of the central channel in parallel, the front and rear ends of the front floor longitudinal beam are respectively fixed with a front girder extension beam and a rear floor front cross beam in a two-layer mode, the front girder extension beam and the rear floor front cross beam are respectively fixed with the front and rear sides of a threshold inner plate in a two-layer mode, the threshold inner plate is arranged on the outer side of the front floor longitudinal beam, the front seat cross beam assembly and the rear seat cross beam assembly are respectively arranged on the left and right sides of the central channel and are respectively fixed with the central channel in a two-layer mode at corresponding positions, the left side and the right side of the front seat beam assembly and the left side and the right side of the rear seat beam assembly are respectively fixed with the doorsill inner plates on the left side and the right side in a two-layer mode at corresponding positions, and the front seat beam assembly, the rear seat beam assembly and the front floor longitudinal beam are respectively provided with an overlapping part and are fixed in a two-layer mode at corresponding positions of the overlapping part.

2. A front floor frame structure according to claim 1, wherein: the rear longitudinal beam of the channel and the rear seat cross beam assembly are respectively provided with an overlapping part at the fixing part of the central channel, and the rear seat cross beam assembly, the rear longitudinal beam of the channel and the central channel are fixed in a three-layer manner at the corresponding positions of the overlapping parts.

3. A front floor frame structure according to claim 1, wherein: inner plate connecting pieces are symmetrically arranged on the outer sides of the front parts of the two front floor longitudinal beams respectively, and the front end of the doorsill inner plate is fixed with the inner plate connecting pieces in a two-layer mode.

4. A front floor frame structure according to claim 1, wherein: the rear side of preceding girder extension beam transversely is provided with preceding floor front beam, the left and right sides of preceding floor front beam respectively with the left and right sides preceding girder extension beam two-layer formula is fixed.

5. A front floor frame structure according to claim 3, wherein: front floor extension beams are symmetrically and longitudinally arranged on the inner sides of the front portions of the front floor front cross beams respectively, and the front side and the rear side of each front floor extension beam are fixed with the front girder extension beams and the front floor front cross beams in a two-layer mode respectively.

6. A front floor frame structure according to any one of claims 1-5, characterized in that: the rear seat beam assembly comprises a left rear beam, a right rear beam and a beam connecting piece, the left side and the right side of the beam connecting piece are fixed with the left rear beam and the right rear beam in a two-layer mode respectively, the front side and the rear side of the beam connecting piece are fixed with the central channel and the front floor rear longitudinal beam in a two-layer mode respectively, the left side of the left rear beam and the right side of the right rear beam are fixed with the doorsill inner plate in a two-layer mode respectively, and the middle of the left rear beam and the middle of the right rear beam are fixed with the front floor longitudinal beam in a two-layer mode respectively.

7. A front floor frame structure according to any one of claims 1-5, characterized in that: the rear seat beam assembly is connected with the central channel, a beam reinforcing plate is arranged at a position corresponding to the connecting position of the rear seat beam assembly and the central channel, the front side of the beam reinforcing plate is fixed with the central channel, and the rear side of the beam reinforcing plate is fixed with the rear seat beam assembly.

8. A front floor frame structure according to any one of claims 1-5, characterized in that: the rear seat beam assembly is connected with the front floor longitudinal beam on the left side and the right side, and a second longitudinal beam extension piece is arranged at a corresponding position, integrally formed or fixed on the outer side of the front floor longitudinal beam and transversely extends along the rear seat beam assembly, and the second longitudinal beam extension piece and the rear seat beam assembly are fixed in a two-layer mode.

9. A front floor frame structure according to any one of claims 1-5, characterized in that: the front cross beam assembly comprises a left front cross beam and a right front cross beam, the left side and the right side of the left front cross beam are fixed with the doorsill inner plate and the central channel in a two-layer mode, and the left side and the right side of the right front cross beam are fixed with the central channel and the doorsill inner plate in a two-layer mode.

10. A front floor frame structure according to any one of claims 1-5, characterized in that: the front seat beam assembly is connected with the front floor longitudinal beam on the left side and the right side, and a first longitudinal beam extension piece is arranged at a corresponding position, integrally formed or fixed at the outer side of the bottom of the front floor longitudinal beam and transversely extends along the front seat beam assembly, and the top of the first longitudinal beam extension piece is fixed with the bottom of the front seat beam assembly in a two-layer mode.

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