Rear longitudinal beam connector and vehicle frame

Abstract

The application relates to a rear longitudinal beam connecting piece and an automobile frame. The rear longitudinal beam connecting piece is applied to the automobile frame, the automobile frame comprises a bottom plate, a rear longitudinal beam and a rear cross beam connected to the same side of the bottom plate, the bottom plate, the rear longitudinal beam and the rear cross beam surround to form a containing space, the rear longitudinal beam connecting piece comprises a first end part and a second end part, the first end part comprises a first inner plate, the first inner plate is accommodated in the containing space and located on the surface of part of the bottom plate and the rear longitudinal beam; the second end part is connected with the first end part, the second end part comprises a second inner plate, the second inner plate is accommodated in the containing space and located on the surface of part of the bottom plate and the rear cross beam; wherein the bottom plate is recessed to form a first step and a second step, one end of the first inner plate connected with the bottom plate is located on the first step and the surface of the first inner plate is flush with the surface of the bottom plate, one end of the second inner plate connected with the bottom plate is located on the second step and the surface of the second inner plate is flush with the surface of the bottom plate. Through the above mode, the sealing performance of the containing space can be effectively ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric vehicles, in particular to a rear longitudinal beam connecting piece and a vehicle frame. BACKGROUND

[0002] With the continuous development of electric vehicles, battery technology has also made great progress. In order to increase the endurance of electric vehicles, the battery has developed from a small module to CTP and then to CTC. CTC is an integrated solution of battery cells and the vehicle body. With the application of steel-aluminum hybrid vehicle body technology in the vehicle body field, how to realize the combination of steel-aluminum hybrid structure application and CTC integration technology has become a new topic.

[0003] At present, there are two structures of vehicle frames: all-aluminum vehicle body and all-steel vehicle body. Whether it is an all-aluminum vehicle body or an all-steel vehicle body, due to the limitation of the vehicle body structure, the sealing performance of the vehicle body is poor, so that the battery pack needs to be separately arranged with the vehicle frame to ensure the safety of the battery pack. However, the battery pack of this mode has the problems of heavy quality, low space utilization and high cost. SUMMARY

[0004] The application provides a rear longitudinal beam connecting piece to solve the sealing problem of the vehicle frame.

[0005] The application provides a rear longitudinal beam connecting piece applied to a vehicle frame, the vehicle frame comprising a bottom plate, a rear longitudinal beam and a rear cross beam connected to the same side of the bottom plate, and the bottom plate, the rear longitudinal beam and the rear cross beam surrounding to form a containing space, comprising:

[0006] a first end portion comprising a first inner plate, the first inner plate being accommodated in the containing space and located on the surface of part of the bottom plate and the rear longitudinal beam; and

[0007] a second end portion connected to the first end portion, the second end portion comprising a second inner plate, the second inner plate being accommodated in the containing space and located on the surface of part of the bottom plate and the rear cross beam;

[0008] wherein the bottom plate is recessed to form a first step corresponding to the first inner plate and a second step corresponding to the second inner plate, one end of the first inner plate connected to the bottom plate is located on the first step and the surface of the first inner plate is flush with the surface of the bottom plate, and one end of the second inner plate connected to the bottom plate is located on the second step and the surface of the second inner plate is flush with the surface of the bottom plate.

[0009] In some embodiments, the vehicle frame further comprises a rocker on the rear longitudinal beam away from the bottom plate, and the end portion of the first inner plate away from the bottom plate is located on the rocker.

[0010] In some embodiments, the first inner plate is connected to the rocker via a single-sided self-tapping thread process.

[0011] In some embodiments, the rear longitudinal beam connector further comprises a first support between the first inner plate and the rear longitudinal beam for supporting the first inner plate.

[0012] In some embodiments, the rear longitudinal beam connector further comprises a second support between the second inner plate and the rear cross beam for supporting the second inner plate.

[0013] In some embodiments, the first inner plate is connected to the rear longitudinal beam and the floor via a spot welding process, and the second inner plate is connected to the rear cross beam and the floor via a spot welding process.

[0014] In some embodiments, the first end further comprises a first outer plate spaced apart from the first inner plate and a first connecting plate connecting the first inner plate and the first outer plate, and the first outer plate is located on a surface of the rear longitudinal beam facing away from the accommodation space.

[0015] In some embodiments, the second end further comprises a second outer plate spaced apart from the second inner plate and a second connecting plate connecting the second inner plate and the second outer plate, and the second outer plate is located on a surface of the rear longitudinal beam facing away from the accommodation space, the second outer plate is connected to the first outer plate, and the second connecting plate is connected to the first connecting plate.

[0016] In some embodiments, the rear longitudinal beam connector further comprises a third end comprising a third inner plate, a third outer plate, and a third connecting plate connecting the third inner plate and the third outer plate, and the automobile frame further comprises a rear longitudinal extension beam, the third inner plate and the third outer plate are located on surfaces of the rear longitudinal extension beam facing away from each other, wherein the third inner plate is connected to the second outer plate, the third outer plate is connected to the first outer plate, and the third connecting plate is connected to the first connecting plate and the second connecting plate.

[0017] In some embodiments, the rear longitudinal beam connector further comprises a third support between the third inner plate and the rear longitudinal extension beam for supporting the third inner plate.

[0018] In some embodiments, the rear longitudinal beam connector further comprises a sub-frame mounting located at a position where the rear longitudinal beam, the rear longitudinal extension beam, and the rear cross beam are connected, and the sub-frame mounting is connected to the first connecting plate, the second connecting plate, and the third connecting plate and fixed to the rear longitudinal beam.

[0019] The embodiments of the present application also provide an automobile frame, comprising:

[0020] rear longitudinal beams;

[0021] a threshold connected to the rear longitudinal beams;

[0022] rear cross beams and a bottom plate, the rear longitudinal beams, the rear cross beams and the bottom plate surrounding a receiving space for accommodating a battery; and

[0023] a rear longitudinal beam connector.

[0024] The rear longitudinal beam connector provided by the embodiment of the present application is accommodated in the receiving space by the first inner plate and located on the surface of the partial bottom plate and the rear longitudinal beam, the second inner plate is accommodated in the receiving space and located on the surface of the partial bottom plate and the rear cross beam, one end of the first inner plate connected to the bottom plate is located on the first step and the surface of the first inner plate is flush with the surface of the bottom plate, one end of the second inner plate connected to the bottom plate is located on the second step and the surface of the second inner plate is flush with the surface of the bottom plate, which can ensure the sealing performance of the receiving space, so that the battery pack can be directly accommodated in the receiving space without a shell, that is, the automobile frame can be equivalent to a part of the battery pack shell, and can improve the space utilization of the receiving space. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a perspective view of an automobile frame provided by the embodiment of the present application;

[0027] Figure 2 is Figure 1 is a partial enlarged view of the area A in the automobile frame shown in FIG. 1;

[0028] Figure 3 is Figure 1 is a perspective view of the bottom plate in the automobile frame shown in FIG. 1;

[0029] Figure 4 is Figure 1 is a perspective view of the cooperation of the rear longitudinal beam, the threshold and the rear longitudinal beam connector in the automobile frame shown in FIG. 1;

[0030] Figure 5 is Figure 4 is a front view of the cooperation of the rear longitudinal beam, the threshold and the rear longitudinal beam connector in the automobile frame shown in FIG. 1;

[0031] Figure 6 is Figure 4The automobile frame rear side member, the sill and the rear side member connector cooperate along the direction of B-B section view shown in the schematic diagram;

[0032] Figure 7 is Figure 4 The automobile frame rear side member, the sill and the rear side member connector cooperate along the direction of B-B section view shown in the schematic diagram;

[0033] Figure 8 is Figure 4 The automobile frame rear side member, the sill and the rear side member connector cooperate along the direction of B-B section view shown in the schematic diagram;

[0034] Figure 9 is Figure 1 The automobile frame rear side member, the sill and the rear side member connector cooperate along the direction of B-B section view shown in the schematic diagram;

[0035] Figure 10 The automobile frame rear side member, the sill and the rear side member connector cooperate along the direction of B-B section view shown in the schematic diagram. DETAILED DESCRIPTION

[0036] The application will be described in further detail to the accompanying drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustrating the application, but not for limiting the scope of the application. Similarly, the following embodiments are only part of the embodiments of the application, but not all the embodiments of the application. All other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0037] In this paper, the "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the automobile frame provided by the embodiment of the application, Figure 2 is Figure 1The image shows a partial enlarged view of region A in the vehicle frame. This application provides an electric vehicle, which may include, but is not limited to, a vehicle frame 100 and a battery pack. The vehicle frame 100 may have a receiving space 101, which can be used to house and secure the battery pack. Specifically, the receiving space 101 may have good sealing properties, and the battery pack is housed within the receiving space 101, allowing the vehicle frame 100 to function as part of the battery pack. This reduces the weight of the battery pack, improves its space utilization, and reduces the cost of the battery pack and even the electric vehicle.

[0039] The vehicle frame 100 may include, but is not limited to, the rear longitudinal beam 10, the rear cross beam 20, the floor plate 30, the door sill 40, and the rear longitudinal beam connector 50.

[0040] Specifically, there are two rear longitudinal beams 10 arranged at intervals opposite to each other, and two rear crossbeams 20 arranged at intervals opposite to each other. The two rear crossbeams 20 are located between and connect the two rear longitudinal beams 10, forming a roughly "U"-shaped structure. The base plate 30 is located on the same side as the rear longitudinal beams 10 and the rear crossbeams 20, and together with the rear longitudinal beams 10 and the rear crossbeams 20, forms an accommodating space 101. A threshold 40 is located on the surface of the rear longitudinal beams 10 facing away from the base plate 30.

[0041] The rear longitudinal beam 10 is located at the rear of the vehicle frame 100, near the trunk. The rear longitudinal beam 10 primarily functions to absorb energy; specifically, it can absorb collision energy through crushing and bending deformation, making it the main energy absorber in rear-end collisions. Specifically, the rear longitudinal beam 10 may include a first inner surface 11 and a first outer surface 12 spaced apart and opposite to each other, as well as a first connecting surface 13 connecting the first inner surface 11 and the first outer surface 12. The first inner surface 11 is located within the accommodating space 101, while the first outer surface 12 is positioned away from the accommodating space 101.

[0042] Of course, the vehicle frame 100 may also include a front longitudinal beam (not shown), which is located at the front of the vehicle frame 100, near the front of the vehicle. Similarly, the front longitudinal beam can absorb collision energy through crushing and bending deformation, and it bears 60% of the total collision energy. To better absorb energy, the front and rear longitudinal beams 10 deform as much as possible along the axial crushing direction. Specifically, the front longitudinal beam should be as straight as possible, generally with a rectangular cross-section, and has internal reinforcing plates.

[0043] The rear cross beam 20 is located between the two rear longitudinal beams 10, and is used to ensure the torsional stiffness of the automobile frame 100, bear longitudinal loads, and support the main components on the automobile, and is also used to enclose the accommodation space 101 for accommodating the battery pack with the rear longitudinal beams 10. Specifically, the accommodation space 101 in the embodiment will partially replace the function of the battery pack shell, thereby improving the space utilization rate of the battery pack and reducing the weight of the battery pack. Specifically, the rear cross beam 20 can include a second inner surface 21 and a second outer surface 22 arranged at intervals, and a second connecting surface 23 connecting the second inner surface 21 and the second outer surface 22, wherein the second inner surface 21 is located in the accommodation space 101, and the second outer surface 22 is arranged away from the accommodation space 101.

[0044] The bottom plate 30 connects the rear longitudinal beam 10 and the rear cross beam 20, and is used to support and fix the battery pack on the one hand, and to protect the battery pack from foreign matter penetrating the bottom plate 30 and damaging the battery pack on the other hand.

[0045] The rocker 40 is located at the position of the rear longitudinal beam 10 away from the bottom plate 30, specifically at the bottom edge of the lower edge of the door. When the vehicle is subjected to a side collision, the rocker 40 can assist the B-pillar to absorb collision energy and protect the occupants in the vehicle. Specifically, the rocker 40 is usually made of hollow aluminum alloy material, which can reduce the weight of the vehicle on the one hand, and can be used to absorb collision energy and improve the safety of the vehicle on the other hand. In addition, the rocker 40 can play a certain decorative role and improve the appearance performance of the automobile.

[0046] Please continue to refer to Figure 2 The rear longitudinal beam connector 50 can include a first end portion 51 and a second end portion 52, wherein the first end portion 51 can be used to connect the bottom plate 30 and the rear longitudinal beam 10, and the second end portion 52 can be used to connect the bottom plate 30 and the rear cross beam 20. The first end portion 51 can be connected to the second end portion 52 to improve the sealing performance of the accommodation space 101, specifically the sealing performance of the rear longitudinal beam 10 and the bottom plate 30, and the sealing performance of the rear cross beam 20 and the bottom plate 30.

[0047] It should be noted that the terms "first", "second", "third" in the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0048] Specifically, the first end portion 51 can include a first inner plate 511, which is accommodated in the accommodating space 101 and located on the surface of the rear longitudinal beam 10 and the partial bottom plate 30, for improving the sealing of the connection between the bottom plate 30 and the rear longitudinal beam 10. The second end portion 52 can include a second inner plate 521, which is connected to the first inner plate 511 and accommodated in the accommodating space 101 and located on the surface of the rear cross beam 20 and the bottom plate 30, for improving the sealing of the connection between the bottom plate 30 and the rear cross beam 20.

[0049] Please refer to Figure 3 , Figure 3 is Figure 1 the perspective view of the bottom plate in the automobile frame shown in FIG. 1. In addition, the bottom plate 30 is recessed to form a first step 31 corresponding to the position of the rear longitudinal beam 10, and the first step 31 is provided corresponding to the first inner plate 511, and one end of the first inner plate 511 connected to the bottom plate 30 is located on the first step 31, so that the surface of the first inner plate 511 can be flush with the surface of the bottom plate 30, that is, the thickness of the first inner plate 511 is equivalent to the thickness of the first step 31, which can not only ensure the flatness of the bottom plate 30 and the first inner plate 511, but also improve the space utilization of the accommodating space 101, and on the other hand, it can ensure the sealing reliability of the first inner plate 511 and the bottom plate 30.

[0050] Similarly, the bottom plate 30 is recessed to form a second step 32 corresponding to the position of the rear cross beam 20, and the second step 32 is provided corresponding to the second inner plate 521, and one end of the second inner plate 521 connected to the bottom plate 30 is located on the second step 32, that is, the thickness of the second inner plate 521 is equivalent to the thickness of the second step 32, so that the surface of the second inner plate 521 can be flush with the surface of the bottom plate 30, which can not only ensure the flatness of the bottom plate 30 and the second inner plate 521, but also improve the space utilization of the accommodating space 101, and on the other hand, it can ensure the sealing reliability of the second inner plate 521 and the bottom plate 30.

[0051] The first end portion 51 can be used to connect the bottom plate 30 and the rear longitudinal beam 10, and specifically, the first end portion 51 can include the first inner plate 511, the first outer plate 512 and the first connecting plate 513 connecting the first inner plate 511 and the first outer plate 512, which are arranged at intervals.

[0052] Please refer to Figure 4 and Figure 5 , Figure 4 is Figure 1 the perspective view of the rear longitudinal beam, the rocker and the rear longitudinal beam connecting piece in the automobile frame shown in FIG. 1, Figure 5 is Figure 4The first end portion 51 can be divided into a first part 5101 away from the rocker 40 and a second part 5102 corresponding to the rocker 40. The first part 5101 of the first end portion 51 is used to wrap the rear longitudinal beam 10 away from the rocker 40, and the second part 5102 of the first end portion 51 is used to wrap the rear longitudinal beam 10 and the corresponding rocker 40 structure.

[0053] In the first part 5101 of the first end portion 51, the first inner plate 511 is accommodated in the accommodation space 101 and located on the bottom plate 30 and the inner surface (i.e. the first inner surface 11) of the rear longitudinal beam 10, so as to improve the sealing of the bottom plate 30 and the inner surface of the rear longitudinal beam 10. In this embodiment, the first inner plate 511 can be connected and fixed to the bottom plate 30 and the first inner surface 11 by spot welding process, which can not only ensure the reliability of the connection, but also reduce the protrusions on the surface of the first inner plate 511, ensure the smoothness of the surface of the first inner plate 511, reduce the possibility of friction and scratching between the surface of the first inner plate 511 and the battery pack, and improve the safety of the battery pack.

[0054] The first outer plate 512 is located on the first outer surface 12, and the first connecting plate 513 is located on the first connecting surface 13. Specifically, the first outer plate 512 is connected and fixed to the first outer surface 12 and the first connecting surface 13 by spot welding process, so that the first part 5101 of the first end portion 51 wraps most of the rear longitudinal beam 10, improves the reliability of the connection between the first end portion 51 and the rear longitudinal beam 10, and prevents the first inner plate 511 from being separated from the rear longitudinal beam 10. Of course, in other embodiments, the first outer plate 512 can also be connected to the first outer surface 12 by a fixing member, such as a screw, which is sequentially inserted through the first fixing hole and the corresponding first matching hole, so as to connect and fix most of the first outer plate 512 to the first outer surface 12.

[0055] Please refer to Figure 6 and Figure 7 , Figure 6 is Figure 4 the cross-sectional view of the cooperation between the rear longitudinal beam, the rocker and the rear longitudinal beam connecting member along the direction B-B of the automobile frame shown in Figure 7 is Figure 4The automobile frame rear side sill, the sill and the rear side sill connecting piece cooperate with another direction of the three-dimensional schematic view. In the first end 51 corresponding to the second part 5102, the first inner plate 511 is accommodated in the accommodation space 101, and the first inner plate 511 is located on the inner surface of the bottom plate 30, the inner surface (i.e. the first inner surface 11) of the rear side sill 10 and the inner surface of the sill 40 (i.e. the surface of the sill 40 facing the accommodation space 101), for improving the sealing of the bottom plate 30 and the inner surface of the rear side sill 10 and the inner surface of the sill 40. In the embodiment, the first inner plate 511 can be connected and fixed with the bottom plate 30 and the first inner surface 11 by spot welding process, which can ensure the reliability of the connection and reduce the protrusions on the surface of the first inner plate 511, ensure the smoothness of the surface of the first inner plate 511, reduce the possibility of friction and scratching between the surface of the first inner plate 511 and the battery pack, and improve the safety of the battery pack. The first inner plate 511 can be connected with the inner surface of the sill 40 by single-sided self-tapping thread process, to improve the reliability of the connection between the first inner plate 511 and the inner surface of the sill 40.

[0056] The surface of the sill 40 away from the rear side sill 10 is at least partially flush with the first connecting surface 13 of the rear side sill 10, in other words, the sill 40 includes a first step 31 surface and a second step 32 surface in a stepped structure, and a fixed surface connecting the first step 31 surface and the second step 32 surface, wherein the first step 31 surface is flush with the first connecting surface 13, and the second step 32 surface can be higher than the first step 31 surface.

[0057] In the first end 51 corresponding to the second part 5102, the first connecting plate 513 is located on the first step 31 surface and partially adheres to the fixed surface. Specifically, the first connecting plate 513 is connected and fixed with the first step 31 surface and the fixed surface by spot welding process, which can wrap most of the sill 40 in the first end 51 corresponding to the second part 5102, improve the reliability of the connection between the first end 51 and the sill 40, and prevent the first inner plate 511 from being separated from the rear side sill 10.

[0058] Please refer to Figure 8 , Figure 6 is Figure 4 The automobile frame rear side sill, the sill and the rear side sill connecting piece cooperate with another direction of the three-dimensional schematic view. The rear side sill connecting piece 50 can further include a first support 54 located between the first inner plate 511 and the rear side sill 10 (specifically the first inner surface 11), which can be used to support the first inner plate 511 and improve the strength of the first inner plate 511, and can be used to shape the first inner plate 511 to adapt to the shape of the battery pack, and improve the matching degree of the accommodation space 101 and the battery pack.

[0059] Optionally, no matter the first end 5101 corresponds to the first end 51 of the first end 52, or the first end 51 of the first end 52, in order to ensure that the first inner plate 511 matches the first inner surface 11, and to improve the consistency of the first inner plate 511, the first inner surface 11 needs to be milled to a certain thickness, and the thickness of the first inner surface 11 is equal to the thickness of the first inner plate 511.

[0060] In addition, a gap is provided between the first inner plate 511 and the first inner surface 11, and the gap between the first inner plate 511 and the first inner surface 11 is filled by smearing glue, further improving the connection reliability of the first inner plate 511 and the first inner surface 11. In the embodiment, the gap between the first inner plate 511 and the first inner surface 11 is 5mm. In other embodiments, the gap between the first inner plate 511 and the first inner surface 11 can also be 2mm, 3mm, 4mm, 6mm, etc., which is not limited here.

[0061] Please refer to Figure 2 and Figure 9 and Figure 10 , Figure 9 is Figure 1 the automobile frame shown in the middle and rear longitudinal beam, rear beam, rear beam and rear beam connector cooperation three-dimensional schematic diagram, Figure 10 is 9 shown in the automobile frame middle and rear beam connector, rear beam, rear beam and rear beam connector cooperation another angle of three-dimensional schematic diagram. The second end 52 can be used to connect the bottom plate 30 and the rear beam 20, specifically, the second end 52 can include a second inner plate 521 and a second outer plate 522 arranged at intervals, and a second connecting plate 523 connecting the second outer plate 522 and the second inner plate 521.

[0062] Among them, the second inner plate 521 is accommodated in the accommodation space 101, and the second inner plate 521 is located on the inner surface (i.e. the second inner surface 21) of the bottom plate 30 and the rear beam 20, for improving the sealing of the inner surface of the bottom plate 30 and the rear beam 20. In the embodiment, the second inner plate 521 can be connected and fixed with the bottom plate 30 and the second inner surface 21 through the spot welding process, which can not only ensure the reliability of the connection, but also reduce the protrusions on the surface of the second inner plate 521, ensure the smoothness of the surface of the second inner plate 521, reduce the possibility of friction and scratching between the surface of the second inner plate 521 and the battery pack, and improve the safety of the battery pack.

[0063] The second outer plate 522 is located on the second outer surface 22, and the second connecting plate 523 is located on the second connecting surface 23. Specifically, the second outer plate 522 is connected and fixed with the second outer surface 22 and the second connecting surface 23 through a spot welding process, so that the second end portion 52 of the second portion 5102 can wrap most of the rear cross beam 20, improve the reliability of the connection between the second end portion 52 and the rear cross beam 20, and prevent the second inner plate 521 from being separated from the rear cross beam 20. Of course, in other embodiments, the second outer plate 522 can also be connected with the second outer surface 22 through a fixing member, for example, at least two second fixing holes (not shown in the figure) can be provided on the second outer plate 522, and second matching holes (not shown in the figure) corresponding to the second fixing holes can be provided on the second outer surface 22, and the fixing member such as a screw is sequentially inserted through the second fixing hole and the corresponding second matching hole, thereby achieving the connection and fixation of most of the second outer plate 522 and the second outer surface 22.

[0064] The rear longitudinal beam connecting member 50 can also include a second support member (not shown in the figure), which is located between the second inner plate 521 and the rear cross beam 20 (specifically, the second inner surface 21). On the one hand, it can be used to support the second inner plate 521 to improve the strength of the second inner plate 521, and on the other hand, it can be used to plasticize the second inner plate 521 to adapt to the shape of the battery pack, thereby improving the matching degree of the accommodation space 101 and the battery pack.

[0065] In the embodiment, the automobile frame 100 further includes a rear longitudinal extension beam 60 (for example, a front longitudinal beam), and the rear longitudinal beam connecting member 50 can further include a third end portion 53, which can be used to connect the rear longitudinal extension beam 60 with the rear longitudinal beam 10 and the rear cross beam 20. Specifically, the rear longitudinal extension beam 60 can include a third inner surface 61 and a third outer surface 62 arranged at intervals and a third connecting surface 63 connecting the third inner surface 61 and the third outer surface 62, wherein the third inner surface 61 is located in the accommodation space 101, and the third outer surface 62 is arranged away from the accommodation space 101.

[0066] The rear longitudinal beam connecting member 50 further includes a third end portion 53, which includes a third inner plate 531, a third outer plate 532, and a third connecting plate 533 connecting the third inner plate 531 and the third outer plate 532. The third inner plate 531 and the third outer plate 532 are located on the surfaces opposite to each other of the rear longitudinal extension beam 60 (i.e., the third inner surface 61 and the third outer surface 62), wherein the third inner plate 531 is connected with the second outer plate 522, the third outer plate 532 is connected with the first outer plate 512, and the third connecting plate 533 is connected with the first connecting plate 513 and the second connecting plate 523 at the same time.

[0067] It can be understood that due to the existence of the rear longitudinal extension beam 60, there is a large gap between the first end 51 and the second end 52, so that air, moisture and fine particles can easily enter the accommodation space 101 from the connection position of the rear longitudinal extension beam 60 and the rear longitudinal beam 10, the connection position of the rear longitudinal extension beam 60 and the rear transverse beam 20. The third inner plate 531 can extend the second outer plate 522, the third outer plate 532 can extend the first outer plate 512, and the third connecting plate 533 can extend the first connecting plate 513 and the second connecting plate 523, so that air, moisture and fine particles are away from the connection position of the rear longitudinal extension beam 60 and the rear longitudinal beam 10, the connection position of the rear longitudinal extension beam 60 and the rear transverse beam 20.

[0068] The third inner plate 531 is connected and fixed with the third inner surface 61 by a spot welding process, the third outer plate 532 is connected and fixed with the third outer surface 62 by a spot welding process, and the third connecting plate 533 is connected and fixed with the third connecting surface 63 by a spot welding process. In the above manner, the third end 53 wraps most of the rear longitudinal extension beam 60, and the first end 51 and the rear longitudinal beam 10, the second end 52 and the rear transverse beam 20 are connected to improve the reliability of the third end 53 and the rear longitudinal extension beam 60.

[0069] Of course, in other embodiments, the third end 53 can be fixed with the rear longitudinal extension beam 60 by a fixing member. For example, the third outer plate 532 can also be connected with the third outer surface 62 by a fixing member, for example, at least two third fixing holes (not shown) can be provided on the third outer plate 532, and corresponding third matching holes (not shown) can be provided on the third outer surface 62, and the fixing member, such as a screw, passes through the third fixing hole and the corresponding third matching hole in sequence, to realize the connection and fixation of most of the third outer plate 532 and the third outer surface 62, and further realize the fixation of the third end 53 and the rear longitudinal extension beam 60.

[0070] The rear longitudinal beam connector 50 can also include a third support member (not shown) located between the third inner plate 531 and the rear longitudinal extension beam 60 (specifically the third inner surface 61), which can be used to support the third inner plate 531 and improve the strength of the third inner plate 531.

[0071] Please continue to refer to Figure 2 The rear longitudinal beam connector 50 also includes a subframe mounting member 70 located at the connection position of the rear longitudinal beam 10, the rear longitudinal extension beam 60 and the rear transverse beam 20, and the subframe mounting member 70 is connected with the first connecting plate 513, the second connecting plate 523 and the third connecting plate 533 and is fixed with the rear longitudinal beam 10.

[0072] The rear longitudinal beam connecting piece 50 provided by the embodiments of the present application is accommodated in the accommodating space 101 through the first inner plate 511 and located on the surface of the partial bottom plate 30 and the rear longitudinal beam 10, the second inner plate 521 is accommodated in the accommodating space 101 and located on the surface of the partial bottom plate 30 and the rear cross beam 20, and one end of the first inner plate 511 connected with the bottom plate 30 is located on the first step 31 and the surface of the first inner plate 511 is flush with the surface of the bottom plate 30, and one end of the second inner plate 521 connected with the bottom plate 30 is located on the second step 32 and the surface of the second inner plate 521 is flush with the surface of the bottom plate 30, which can ensure the sealing performance of the accommodating space 101, so that the battery pack can be directly accommodated in the accommodating space 101 without a shell, that is, the automobile frame 100 can be equivalent to a part of the battery pack shell, and on the other hand, the space utilization of the accommodating space 101 can be improved.

[0073] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application, and any equivalent device or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A rear side member connecting member for use in an automobile frame, the automobile frame including a floor panel, a rear side member and a rear cross member connected to the same side of the floor panel, the floor panel, the rear side member and the rear cross member enclosing a receiving space, characterized in that, The accommodating space is used for accommodating at least part of a battery pack, the battery pack comprising a battery and a shell, part of the battery being accommodated in the shell and the rest of the battery being exposed in the accommodating space, the rear longitudinal beam connector comprising: a first end portion comprising a first inner plate accommodated in the accommodating space and located on part of the bottom plate and a surface of the rear longitudinal beam; and a second end portion connected with the first end portion, the second end portion comprising a second inner plate accommodated in the accommodating space and located on part of the bottom plate and a surface of the rear cross beam; wherein the bottom plate is recessed to form a first step corresponding to the first inner plate and a second step corresponding to the second inner plate, one end of the first inner plate connected with the bottom plate is located on the first step and a surface of the first inner plate is flush with a surface of the bottom plate, one end of the second inner plate connected with the bottom plate is located on the second step and a surface of the second inner plate is flush with a surface of the bottom plate; the rear longitudinal beam connector further comprising a first support located between the first inner plate and the rear longitudinal beam for supporting the first inner plate; the rear longitudinal beam connector further comprising a second support located between the second inner plate and the rear cross beam for supporting the second inner plate; the first end portion further comprising a first outer plate spaced apart from the first inner plate and a first connecting plate connecting the first inner plate and the first outer plate, the first outer plate being located on a surface of the rear longitudinal beam facing away from the accommodating space.

2. The rear longitudinal chassis member according to claim 1, characterized in that The automobile frame further comprises a rocker located on a surface of the rear longitudinal beam facing away from the bottom plate, and one end of the first inner plate located on the rocker is away from the bottom plate.

3. The rear longitudinal chassis member according to claim 2, characterized in that The first inner plate is connected with the rocker by a single-sided self-tapping thread process.

4. The rear longitudinal chassis member of claim 1, wherein The first inner plate is connected with the rear longitudinal beam and the bottom plate by a spot welding process, and the second inner plate is connected with the rear cross beam and the bottom plate by a spot welding process.

5. The rear longitudinal chassis member of claim 1, wherein The second end portion further comprises a second outer plate spaced apart from the second inner plate and a second connecting plate connecting the second inner plate and the second outer plate, the second outer plate being located on a surface of the rear longitudinal beam facing away from the accommodating space, the second outer plate being connected with the first outer plate, and the second connecting plate being connected with the first connecting plate.

6. The rear longitudinal chassis member of claim 5, wherein The rear longitudinal beam connector further comprises a third end portion comprising a third inner plate, a third outer plate and a third connecting plate connecting the third inner plate and the third outer plate; and the automobile frame further comprises a rear longitudinal extension beam, the third inner plate and the third outer plate being located on opposite surfaces of the rear longitudinal extension beam, wherein the third inner plate is connected with the second outer plate, the third outer plate is connected with the first outer plate, and the third connecting plate is connected with the first connecting plate and the second connecting plate.

7. The rear longitudinal chassis member of claim 6, characterized in that The rear longitudinal beam connector further comprises a third support located between the third inner plate and the rear longitudinal extension beam for supporting the third inner plate.

8. An automotive vehicle frame characterized by, The automobile frame comprises: a rear longitudinal beam; a rocker connected to the rear longitudinal beam; The rear cross beam and the bottom plate, the rear longitudinal beam, the rear cross beam and the bottom plate form a containing space containing the battery pack; And The rear longitudinal beam connector according to any one of claims 1-4.

9. The automotive vehicle frame of claim 8 wherein, The second end portion further comprises a second outer plate spaced apart from the second inner plate and a second connecting plate connecting the second inner plate and the second outer plate, the second outer plate is located on the surface of the rear longitudinal beam away from the containing space, the second outer plate is connected with the first outer plate, and the second connecting plate is connected with the first connecting plate; The rear longitudinal beam connector further comprises a third end portion, the third end portion comprises a third inner plate, a third outer plate and a third connecting plate connecting the third inner plate and the third outer plate; the automobile frame further comprises a rear longitudinal extension beam, the third inner plate and the third outer plate are located on the surfaces on the opposite sides of the rear longitudinal extension beam, wherein the third inner plate is connected with the second outer plate, the third outer plate is connected with the first outer plate, and the third connecting plate is connected with the first connecting plate and the second connecting plate at the same time; The automobile frame further comprises a sub-frame mounting member, the sub-frame mounting member is located at the position where the rear longitudinal beam, the rear longitudinal extension beam and the rear cross beam are connected, and the sub-frame mounting member is connected with the first connecting plate, the second connecting plate and the third connecting plate at the same time and is fixedly connected with the rear longitudinal beam.

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