CN220349787U - Automobile frame assembly - Google Patents

Abstract

The utility model relates to an automobile frame component, the automobile frame component includes preceding wall skeleton, threshold beam skeleton, strengthens heel board and installation roof beam, and threshold beam skeleton is located preceding wall skeleton's side along car width direction to be connected with preceding wall skeleton, strengthen heel board along car length direction and be located preceding wall skeleton's rear and be connected with threshold beam skeleton, strengthen heel board and be used for installing the second row seat of car; the mounting beam extends along the length direction of the automobile, one end of the mounting beam is fixedly connected with the front wall framework, and the other end of the mounting beam is fixedly connected with the reinforced heel plate; wherein enclose the first accommodation space jointly between skeleton, the reinforcing heel board and the installation roof beam before, first accommodation space is used for holding the battery package. The application provides a car frame subassembly conveniently arranges the battery package to can satisfy the safety demand when new energy automobile sound production collision.

Description

Automobile frame assembly

Technical Field

The application relates to the technical field of automobile frames, in particular to an automobile frame component.

Background

With the continuous development of new energy automobiles, the market permeability of the new energy automobiles is continuously improved, and meanwhile, the application scenes are also continuously expanded. The new energy automobile needs to be assembled with a battery pack, the battery pack is usually fixed on an automobile frame, and the automobile frame is used as a main force transmission structure, and the safety of the new energy automobile needs to be ensured by bearing force and absorbed motion energy when the automobile collides, so that the automobile frame which can meet the arrangement requirement of the battery and the safety requirement of the automobile when the new energy automobile collides needs to be designed.

Disclosure of Invention

Based on this, it is necessary to provide an automobile frame assembly to meet the arrangement requirements of the battery pack and the vehicle safety requirements at the time of collision of the automobile.

The automobile frame component comprises a front wall framework, a threshold beam framework, a reinforced heel plate and an installation beam, wherein the threshold beam framework is positioned on the side face of the front wall framework along the width direction of an automobile and is connected with the front wall framework, the reinforced heel plate is positioned at the rear of the front wall framework along the length direction of the automobile and is connected with the threshold beam framework, and the reinforced heel plate is used for installing a second row of automobile chairs of the automobile; the mounting beam extends along the length direction of the automobile, one end of the mounting beam is fixedly connected with the front wall framework, and the other end of the mounting beam is fixedly connected with the reinforced heel plate; wherein enclose the first accommodation space jointly between skeleton, the reinforcing heel board and the installation roof beam before, first accommodation space is used for holding the battery package.

In one embodiment, the mounting beam includes a plurality of beam segments aligned along the length of the vehicle, and adjacent beam segments are welded together. It will be appreciated that such an arrangement is beneficial in ensuring the accuracy of the mounting location of the mounting beam.

In one embodiment, the automobile frame assembly further comprises a front panel structure, the front panel structure covers the first accommodating space, and the mounting beam is arranged below the front panel structure along the automobile height direction and fixedly connected with the front panel structure. It will be appreciated that this arrangement results in a more secure mounting of the mounting beam.

In one embodiment, the front panel structure includes a front panel and a front floor panel, one end of the front panel is fixedly connected to the front frame, the other end of the front panel extends into the first accommodating space, and a lap joint edge is formed in the first accommodating space, one end of the front floor panel is lap-jointed to the lap joint edge, and the other end is lap-jointed to the reinforced heel plate. It will be appreciated that, by so doing, the front panel can strengthen the front skeleton.

In one embodiment, the mounting beam comprises a first section, a second section and a third section which are welded in sequence from front to back along the length direction of the automobile, a first welding position is formed between the first section and the second section, and the first welding position is arranged corresponding to the front floor panel; and a second welding position is formed between the second section and the third section, and the second welding position is arranged corresponding to the front floor panel. It will be appreciated that such an arrangement is beneficial for improving the structural strength of the automotive frame assembly.

In one embodiment, the mounting beam includes a first beam and a second beam disposed at intervals along the vehicle width direction, and both ends of the battery pack in the vehicle width direction are connected to the first beam and the second beam, respectively. It will be appreciated that such an arrangement is beneficial to improving the securement of the battery pack to the vehicle.

In one embodiment, the front wall panel includes a first reinforcing plate, a middle reinforcing plate, and a second reinforcing plate arranged along the width direction of the vehicle, and one end of the first beam, which is close to the front wall skeleton, is connected to the first reinforcing plate; one end of the second beam, which is close to the front wall framework, is connected to the second reinforcing plate, and the thickness of the middle reinforcing plate is respectively smaller than that of the first reinforcing plate and that of the second reinforcing plate. It will be appreciated that such an arrangement is beneficial for reducing the overall weight of the automotive frame assembly.

In one embodiment, the automobile frame assembly further comprises a rear enclosing framework, the rear enclosing framework is located behind the reinforced heel plate along the length direction of the automobile and is connected to the threshold beam framework, and the rear enclosing framework and the reinforced heel plate enclose together to form a second accommodating space which is used for accommodating the motor. It can be appreciated that so set up, enclose the skeleton after and provide accommodation space for the motor.

In one embodiment, the vehicle frame assembly further comprises a rear floor panel, the rear floor panel covers the second accommodating space, the front floor panel is connected below the reinforced heel plate along the vehicle height direction, and the rear floor panel is lapped above the reinforced heel plate along the vehicle height direction, so that the height of the rear floor panel is higher than that of the front floor panel. It will be appreciated that this arrangement allows more assembly space to be reserved for the motor below the rear floor panel 80.

In one embodiment, the beam section is in the shape of a "Chinese character 'ji' with an opening in cross section, and two adjacent beams Duan Xianghu are sleeved and connected by spot welding. It will be appreciated that such an arrangement is advantageous in increasing the welding area of the mounting beam to the front panel structure.

In one embodiment, one of the two adjacent beam sections is provided with a contraction section which contracts towards the direction close to the axis of the beam section, the contraction section is connected with the beam section to form a stop step, the end of the other of the two adjacent beam sections is stopped at the stop step, and the bottom wall of the side of the adjacent beam Duan Beili, which is open, is kept flush. It can be appreciated that the arrangement is beneficial to further improving the firmness of connection of the two adjacent beam sections at two ends, and the installation accuracy of the two adjacent beam sections can be improved.

In one embodiment, the reinforced heel plate comprises a first plate and a second plate fixedly connected in the height direction of the automobile, wherein the first plate and the second plate are Z-shaped plates, and the first plate and the second plate enclose a cavity structure. It will be appreciated that this arrangement is advantageous in reducing the weight of the reinforced heel plate.

Compared with the prior art, the automobile frame subassembly that this application provided, threshold beam skeleton and installation roof beam play the function of following car length direction biography power jointly, and preceding enclose skeleton and reinforcing heel board can support threshold beam skeleton along car width direction respectively to form more firm frame construction. And the second row of seats are installed on the reinforced heel plate, when the automobile collides transversely, the reinforced heel plate can reduce the extrusion deformation degree of the automobile frame component at the second row of seats, and therefore the second row of passengers can be protected.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic view of an automotive frame assembly according to an embodiment of the present disclosure;

FIG. 2 is a bottom view of an automotive frame assembly according to one embodiment provided herein;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is a partial schematic view of a vehicle frame assembly in accordance with one embodiment of the present application;

FIG. 5 is a schematic illustration of a portion of a vehicle frame assembly according to one embodiment of the present application;

FIG. 6 is a partial cross-sectional view of an automotive frame assembly along its length according to one embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a mounting beam according to an embodiment provided herein.

Reference numerals: 10. a front wall skeleton; 11. a first front side member; 12. a second front side member; 30. a threshold beam skeleton; 31. a first accommodation space; 32. a first threshold beam; 33. a second threshold beam; 40. reinforcing the heel plate; 41. a first plate; 42. a second plate; 43. a cavity structure; 50. mounting a beam; 51. a beam section; 511. a first section; 512. a second section; 513. a third section; 514. a first welding site; 515. a second welding position; 516. a constriction section; 517. a stop step; 52. a first beam; 53. a second beam; 60. a front panel structure; 61. a front panel; 611. overlapping the edges; 612. a first reinforcing plate; 613. a middle reinforcing plate; 614. a second reinforcing plate; 62. a front floor panel; 70. a back wall skeleton; 80. a rear floor panel; 90. the second accommodating space.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

With the continuous development of new energy automobiles, the market permeability of the new energy automobiles is continuously improved, and meanwhile, the application scenes are also continuously expanded. The new energy automobile needs to be assembled with a battery pack, the battery pack is usually fixed on an automobile frame, and the automobile frame is used as a main force transmission structure, and the safety of the new energy automobile needs to be ensured by bearing force and absorbed motion energy when the automobile collides, so that the automobile frame capable of meeting the battery arrangement requirement and meeting the safety requirement of the new energy automobile is needed to be designed.

Referring to fig. 1-5, the present application provides an automotive frame assembly including a cowl skeleton 10, a rocker skeleton 30, a reinforcement heel plate 40, and a mounting beam 50. The rocker beam frame 30 is located on the side of the front wall frame 10 in the vehicle width direction and is connected to the front wall frame 10, and the reinforcing heel plate 40 is located behind the front wall frame 10 in the vehicle length direction and is connected to the rocker beam frame. The reinforced heel plate 40 is used for mounting a second row of seats of a car. The mounting beam 50 extends along the length direction of the automobile, one end of the mounting beam 50 is fixedly connected with the front wall skeleton 10, and the other end is fixedly connected with the reinforced heel plate 40; the front wall skeleton 10, the reinforcing heel plate 40 and the mounting beam 50 together form a first accommodating space 31, and the first accommodating space 31 is used for accommodating a battery pack.

Thus, the rocker frame 30 and the mounting beam 50 together function to transmit force in the longitudinal direction of the vehicle, and the front wall frame 10 and the reinforcing heel 40 can support the rocker frame 30 in the width direction of the vehicle, respectively, thereby forming a more firm frame structure. And, the reinforcing heel plate 40 is installed in the second row seat, and the reinforcing heel plate 40 can reduce the degree of crush deformation of the vehicle frame assembly at the second row seat when the vehicle collides laterally, thereby playing a role in protecting the passengers of the second row.

Specifically, as shown in fig. 4 and 5, the vehicle frame assembly further includes a first front side member 11 and a second front side member 12 extending along the vehicle length direction, the first front side member 11 and the second front side member 12 being arranged at intervals along the vehicle width direction and respectively connected to the cowl skeleton 10. The first front side member 11, the second front side member 12, and the cowl skeleton 10 form a front cabin in front of the first accommodating space 31, and the first front side member 11 and the second front side member 12 are configured to resist longitudinal collision of the vehicle.

The rocker frame 30 includes a first rocker 32 and a second rocker 33 extending in the vehicle longitudinal direction, the first and second rocker 32, 33 being aligned in the vehicle width direction, and the mounting beam 50 being located between the first and second rocker 32, 33. When the automobile frame subassembly that this application provided is used for pure electric vehicle type, the battery package can hoist and mount on first threshold roof beam 32 and second threshold roof beam 33 to be favorable to laying the bigger battery package of capacity.

Thus, when the vehicle collides longitudinally, the following force transmission path is formed on the vehicle frame: the first front side member 11/the second front side member 12-the front wall skeleton 10-the rocker skeleton 30/the mount beam 50-the reinforcing heel plate 40.

In one embodiment, as shown in FIG. 3, the mounting beam 50 includes a plurality of beam sections 51 aligned along the length of the vehicle, and adjacent beam sections 51 are welded together.

Compared with the mode that the mounting beam is made into a whole-section beam, the mounting beam 50 is made into a multi-section beam section 51 in a welding mode, so that the mounting position of each section of beam section 51 can be conveniently adjusted in the whole assembly process of the automobile frame assembly, and the accuracy of the mounting position of the mounting beam 50 is guaranteed. For example, the number of beam segments 51 may be two, three, four, five, six, etc., and may be specifically set according to actual needs, which are not listed herein.

In an embodiment, as shown in fig. 2, the vehicle frame assembly further includes a front panel structure 60, the front panel structure 60 covers the first accommodating space 31, and the mounting beam 50 is installed below the front panel structure 60 along the height direction of the vehicle and is fixedly connected with the front panel structure 60.

The upper side of the front panel structure 60 is used to form a passenger compartment floor, and the lower side of the front panel structure 60 is used to connect the mounting beams 50, thereby making the mounting beams 50 more securely mounted. Wherein the battery pack is provided below the front panel structure 60 and the battery pack is hung on the mounting beam 50.

In one embodiment, as shown in fig. 7, the beam section 51 has a cross section in the shape of a "table" with an opening, and two adjacent beam sections 51 are sleeved with each other and connected by spot welding.

In this way, the two side edges of the "table" shape can be welded to the front panel structure 60, respectively. Thus, it is advantageous to increase the welding area of the mounting beam 50 and the front panel structure 60.

In one embodiment, as shown in fig. 2, one of the two adjacent beam sections 51 is provided with a contraction section 516 contracted toward the direction close to the own axis, the contraction section 516 is connected with the beam section 51 to form a stop step 517, and the end of the other of the two adjacent beam sections 51 is stopped at the stop step 517 and the bottom wall of the side of the adjacent beam section 51 facing away from the own opening is kept flush.

Thus, when the two adjacent end beam sections 51 are mutually sleeved, the stop steps 517 can be matched along the length direction of the beam sections 51, so that the firmness of connection of the two adjacent end beam sections 51 is further improved, and the installation accuracy of the two adjacent end beam sections 51 can be improved. Further, the bottom walls of the sides of the adjacent beam sections 51 facing away from the opening thereof are kept flush, so that the bottom of the mounting beam 50 forms a mounting plane for mounting the battery pack, thereby facilitating the maintenance of a uniform gap between the battery pack and the mounting beam 50.

Further, in one embodiment, as shown in fig. 7, the socket joint of the adjacent beam sections 51 is provided with threaded holes, and the adjacent beam sections 51 are connected by fastening bolts.

Further, in one embodiment, as shown in fig. 1 and 5, the front panel structure 60 includes a front panel 61 and a front floor panel 62, one end of the front panel 61 is fixedly connected to the front frame 10, the other end extends into the first accommodating space 31, and a lap joint edge 611 is formed in the first accommodating space 31, one end of the front floor panel 62 is lap-jointed to the lap joint edge 611, and the other end is lap-jointed to the reinforced heel plate 40.

The front panel 69 is connected to the front frame 10 from above to reinforce the front frame 10. Further, by providing the overlapping edge 611, the connection area between the front floor panel 62 and the front wall panel 61 can be increased.

Specifically, the front floor panel 62 is spot-welded to the overlap of the cowl frame 10. The front floor panel 62 is welded to the first rocker 32 and the second rocker 33 at both ends in the vehicle width direction, respectively. The vertical height of the cowl skeleton 10 is greater than the vertical height of the lap edge 611. So that the battery pack can be extended forward to below the front frame 10, thereby contributing to an increase in the volume of the battery pack.

In one embodiment, as shown in fig. 2, the mounting beam 50 includes a first section 511, a second section 512 and a third section 513 welded in sequence from front to rear along the length direction of the vehicle, a first welding site 514 is formed between the first section 511 and the second section 512, and the first welding site 514 is disposed corresponding to the front floor panel 62; a second welding position 515 is formed between the second section 512 and the third section 513, and the second welding position 515 is disposed corresponding to the front floor panel 62.

The first welding position 514 is disposed corresponding to the front floor panel 62, meaning that the first welding position 514 is located below the front floor panel 62, and similarly, the second welding position 515 is disposed corresponding to the front floor panel 62, meaning that the second welding position 515 is located below the front floor panel 62.

In this way, the welding areas of the front wall panel 69 and the front floor panel 62 are staggered from the first welding position 514 along the length direction of the automobile, so that the structural strength of the automobile frame assembly is improved. Likewise, the weld areas of the reinforcing heel plate 40 and the front floor panel 62 are offset from the second weld area 515 along the length of the vehicle, thereby facilitating improved structural strength of the vehicle frame assembly.

In the actual assembly process, as shown in fig. 5, the first section 511 is connected to the front wall skeleton 10 and the front wall panel 61, and the first section 511 extends out of the front wall panel 61 toward the reinforced heel plate 40 to form a first cantilever structure; then connecting the third section 513 to the reinforcing heel 40 and extending the end of the third section 513 out of the reinforcing heel 40 towards the first receiving space 31 to form a second cantilever structure; then, the front floor panel 62 is covered on the first accommodating space 31 from above and is lapped on the first cantilever structure and the second cantilever structure; finally, the two ends of the second section 512 are welded to the first section 511 and the third section 513 respectively.

In one embodiment, the mounting beam 50 includes a first beam 52 and a second beam 53 spaced apart along the vehicle width direction, and both ends of the battery pack in the vehicle width direction are connected to the first beam 52 and the second beam 53, respectively.

Thus, the firmness of the installation of the battery pack is improved. But is not limited thereto, in other embodiments the number of mounting beams 50 may be three, four, five, etc. Of course, the specific arrangement can be set according to actual requirements, and is not listed here.

In one embodiment, as shown in fig. 1, the front wall panel 61 includes a first reinforcing plate 612, a middle reinforcing plate 613, and a second reinforcing plate 614 arranged in the vehicle width direction, and one end of the first beam 52 near the front wall skeleton 10 is connected to the first reinforcing plate 612, the first reinforcing plate 612; one end of the second beam 53 near the front wall skeleton 10 is connected to the second reinforcement plate 614, and the thickness of the middle reinforcement plate 613 is smaller than the thickness of the first reinforcement plate 612 and the thickness of the second reinforcement plate 614, respectively.

Because the first reinforcement plate 612 provides support for the first beam 52 and the second reinforcement plate 614 provides support for the second beam 53, it is desirable to make the first reinforcement plate 612 and the second reinforcement plate 614 thicker, while the middle reinforcement plate 613 does not provide support for the mounting beam 50, so making the middle reinforcement plate 613 thinner is beneficial for reducing the weight of the overall vehicle frame assembly.

Specifically, the first reinforcing plate 612 and the second reinforcing plate 614 are both made of a hot formed high-strength steel material, and the middle reinforcing plate 613 is made of a high-strength steel structure.

In an embodiment, as shown in fig. 1 and 5, the automobile frame assembly further includes a back frame 70, the back frame 70 is located at the rear of the reinforced heel plate 40 along the length direction of the automobile and is connected to the sill beam frame 30, the back frame 70 and the reinforced heel plate 40 jointly enclose a second accommodating space 90, and the second accommodating space 90 is used for accommodating a motor.

Specifically, the front end of the back frame 70 abuts against the reinforcing heel plate 40, and the side wall of the back frame 70 is connected to the rocker frame 30.

Further, in one embodiment, as shown in fig. 1 and 5, the vehicle frame assembly further includes a rear floor panel 80, the rear floor panel 80 covers the second accommodating space 90, the front floor panel 62 is connected below the reinforced heel plate 40 along the vehicle height direction, and the rear floor panel 80 is overlapped above the reinforced heel plate 40 along the vehicle height direction, so that the height of the rear floor panel 80 is higher than that of the front floor panel 62.

In this manner, the reinforced heel panel 40 serves as a boundary between the front floor panel 62 and the rear floor panel 80, wherein the trunk floor is formed above the rear floor panel 80 and the motor is accommodated below the rear floor panel 80. By providing that the rear floor panel 80 is higher than the front floor panel 62, more assembly space can be reserved for the motor below the rear floor panel 80.

Further, as shown in fig. 6, the reinforced heel plate 40 includes a first plate 41 and a second plate 42 fixedly connected in the height direction of the automobile, the first plate 41 and the second plate 42 are both "Z" -shaped plates, and the first plate 41 and the second plate 42 enclose a cavity structure 43.

In this way, it is advantageous to reduce the weight of the reinforced heel plate 40.

Specifically, the first plate 41 is positioned relatively above the second plate 42, and the rear floor panel is overlapped with the upper edge of the first plate 41. The front floor panel 62 is attached to the lower edge of the second plate 42, and the end of the mounting beam 50 adjacent to the second plate 42 is provided with an upwardly extending vertical edge that abuts against the bend of the second plate 42, thereby facilitating an increase in the attachment area of the mounting beam 50 to the second plate 42.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.

Claims (12)

1. The automobile frame assembly is characterized by comprising a front wall framework (10), a threshold beam framework (30), a reinforced heel plate (40) and a mounting beam (50), wherein the threshold beam framework (30) is positioned on the side face of the front wall framework (10) along the width direction of an automobile and is connected with the front wall framework (10), the reinforced heel plate (40) is positioned at the rear of the front wall framework (10) along the length direction of the automobile and is connected with the threshold beam framework, and the reinforced heel plate (40) is used for mounting a second row of automobile chairs of the automobile;

the mounting beam (50) extends along the length direction of the automobile, one end of the mounting beam (50) is fixedly connected with the front wall framework (10), and the other end of the mounting beam is fixedly connected with the reinforced heel plate (40);

the front surrounding framework (10), the reinforced heel plate (40) and the mounting beam (50) jointly form a first accommodating space (31), and the first accommodating space (31) is used for accommodating a battery pack.

2. The automotive frame assembly of claim 1 in which said mounting beam (50) includes a plurality of beam segments (51) aligned along the length of the automobile and adjacent said beam segments (51) are welded together.

3. The vehicle frame assembly according to claim 1, further comprising a front panel structure (60), wherein the front panel structure (60) is covered in the first accommodating space (31), and the mounting beam (50) is installed below the front panel structure (60) in the vehicle height direction and fixedly connected with the front panel structure (60).

4. The vehicle frame assembly according to claim 3, wherein the front panel structure (60) includes a front wall panel (61) and a front floor panel (62),

one end of the front wall panel (61) is fixedly connected with the front wall framework (10), the other end of the front wall panel extends into the first accommodating space (31) and forms a lap joint edge (611) in the first accommodating space (31),

the front floor panel (62) is overlapped at one end to the overlapped edge (611) and at the other end to the reinforced heel plate (40).

5. The automotive frame assembly of claim 4 in which the mounting beam (50) includes a first section (511), a second section (512) and a third section (513) welded in sequence from front to back along the length of the automobile,

a first welding position (514) is formed between the first section (511) and the second section (512), and the first welding position (514) is arranged corresponding to the front floor panel (62);

a second welding position (515) is formed between the second section (512) and the third section (513), and the second welding position (515) is arranged corresponding to the front floor panel (62).

6. The automobile frame assembly according to claim 4, wherein the mounting beam (50) includes a first beam (52) and a second beam (53) disposed at intervals along the automobile width direction, and both ends of the battery pack in the automobile width direction are connected to the first beam (52) and the second beam (53), respectively.

7. The automobile frame assembly according to claim 6, wherein the front wall panel (61) includes a first reinforcement plate (612), a middle reinforcement plate (613), and a second reinforcement plate (614) arranged in the automobile width direction, the first beam (52) being connected to the first reinforcement plate (612) at an end near the front wall skeleton (10), the first reinforcement plate (612); one end of the second beam (53) close to the front wall skeleton (10) is connected to the second reinforcing plate (614),

the thickness of the intermediate reinforcing plate (613) is smaller than the thickness of the first reinforcing plate (612) and the thickness of the second reinforcing plate (614), respectively.

8. The vehicle frame assembly according to claim 4, further comprising a back frame (70), wherein the back frame (70) is located rearward of the reinforcement heel plate (40) in the vehicle length direction and is connected to the rocker frame (30),

the rear enclosing framework (70) and the reinforced heel plate (40) are enclosed together to form a second accommodating space (90), and the second accommodating space (90) is used for accommodating a motor.

9. The vehicle frame assembly according to claim 8, further comprising a rear floor panel (80), wherein the rear floor panel (80) covers the second receiving space (90),

the front floor panel (62) is connected to the lower side of the reinforcing heel plate (40) in the vehicle height direction, and the rear floor panel (80) is overlapped on the upper side of the reinforcing heel plate (40) in the vehicle height direction so that the height of the rear floor panel (80) is higher than the height of the front floor panel (62).

10. The vehicle frame assembly according to claim 2, characterized in that the cross section of the beam section (51) is in the shape of a "table" with an opening, and adjacent two of the beam sections (51) are mutually sleeved and connected by spot welding.

11. The vehicle frame assembly according to claim 10, characterized in that one of the two adjacent beam sections (51) is provided with a constriction (516) converging towards the direction close to its own axis, said constriction (516) being connected to the beam section (51) forming a stop step (517),

the end of the other of the two adjacent beam sections (51) is stopped at the stop step (517) and the bottom wall of the side of the adjacent beam section (51) facing away from the opening is kept flush.

12. The vehicle frame assembly according to claim 1, characterized in that the reinforcing heel plate (40) comprises a first plate (41) and a second plate (42) fixedly connected in the height direction of the vehicle, the first plate (41) and the second plate (42) are both "Z" -shaped plates, and the first plate (41) and the second plate (42) enclose a cavity structure (43).