Vehicle body framework structure and new energy vehicle

Abstract

The utility model relates to the technical field of automobile bodies, in particular to an automobile body framework structure and a new energy automobile. The vehicle body framework structure comprises a rear floor assembly, a front floor assembly and an extension plate, the rear floor assembly comprises a first cross beam, a second cross beam and two longitudinal beams, the longitudinal beams are connected with the first cross beam and the second cross beam to form a first annular main body, an annular channel is formed in the first annular main body, and the annular channel is provided with a first side wall and a second side wall; and a gap is formed at the joint of the first side wall and the second side wall. The front floor assembly comprises a doorsill beam, the extension plate is arranged at the notch, in the thickness direction of the extension plate, one side face of the extension plate is attached to and connected to the bottom wall of the annular channel, the inner wall of the first side wall and the inner wall of the second side wall, and the other side face of the extension plate is used for erecting the doorsill beam and is connected with the doorsill beam. According to the vehicle body framework structure and the new energy vehicle, the problems that an existing white vehicle body structure is poor in sealing performance, and the connecting efficiency between parts is low are solved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile bodies, and in particular to a body frame structure and a new energy vehicle. Background Art

[0002] With the continuous development of new energy vehicles, the performance of the vehicle body has also been greatly improved. At present, in CTC integration technology, since the battery pack and the vehicle body need to be integrated, higher requirements are put forward for the sealing of the body in white, and the efficiency of the skeleton connection of the body in white must be further improved.

[0003] However, the traditional BIW skeleton structure is relatively simple to connect, and the components are relatively independent. For example, the rear end structure of the BIW skeleton is simply connected to the sill beam and the rear floor longitudinal beam to form the left and right side beam assemblies, and then the left and right side beam assemblies are spliced ​​through the crossbeam structure to form a simple ladder-shaped structure. This structure is affected by the processability of the components, and it is easy to form many "rat holes" at the joints, which not only has poor sealing performance, but also low connection efficiency, resulting in poor overall performance of the BIW. Utility Model Content

[0004] Based on this, it is necessary to provide a body frame structure and a new energy vehicle to solve the problems of poor sealing of the existing body-in-white structure and low connection efficiency between components.

[0005] The present application provides a vehicle body frame structure, which includes a rear floor assembly and a front floor assembly, the rear floor assembly includes a first crossbeam, a second crossbeam and two longitudinal beams, the longitudinal beam is arranged between the first crossbeam and the second crossbeam, and is respectively connected with the first crossbeam and the second crossbeam to form a first annular body, the first annular body is provided with an annular channel extending along its own circumference, the outer wall of the annular channel located on the first crossbeam is defined as the first side wall, the outer wall of the annular channel located on the longitudinal beam is defined as the second side wall, and a notch is formed at the connection between the first side wall and the second side wall; the front floor assembly includes a sill beam, and the vehicle body frame structure also includes an extension plate, the extension plate is arranged at the notch, and along the thickness direction of the extension plate, one side of the extension plate is respectively attached to and connected to the bottom wall of the annular channel, the inner wall of the first side wall and the inner wall of the second side wall, and the other side is used for the sill beam to be erected and connected to the sill beam.

[0006] In one embodiment, the first cross beam, the second cross beam and the two longitudinal beams are an integrated structure.

[0007] In one embodiment, the extension plate and the threshold beam are both in a "J"-shaped structure.

[0008] In one embodiment, in a direction from the second cross beam to the first cross beam, the bottom wall of the annular channel at the notch tends to gradually decrease in height.

[0009] In one of the embodiments, a drainage gap is formed between the extension plate, the first side wall and the bottom wall of the annular channel; the threshold beam is provided with a drainage hole, and the drainage hole is arranged corresponding to the drainage gap and communicated with the drainage gap.

[0010] In one embodiment, a first connection area is provided on the bottom wall of the annular channel, and the first connection area is provided on the first cross beam and extends to the connection between the first cross beam and the longitudinal beam; wherein the front floor assembly also includes a battery tray, and a portion of the battery tray is connected to the first connection area.

[0011] In one embodiment, a second connection area is further provided on the bottom wall of the annular channel, and the second connection area is provided at the connection between the first cross beam and the longitudinal beam, and the second connection area is provided behind the first connection area and close to the first connection area; wherein the rear floor assembly also includes a chassis force transmission rod, and the chassis force transmission rod is connected to the second connection area.

[0012] In one embodiment, the front floor assembly also includes a front enclosure frame and a front floor panel, the front enclosure frame is connected to one end of the door sill beam away from the first cross beam, and the front enclosure frame, the door sill beam and the first cross beam form a second annular body; wherein the front floor panel and the battery tray are respectively arranged on both sides of the second annular body, and are both connected to the second annular body to clamp and form a accommodating cavity for installing battery cells.

[0013] In one embodiment, the first cross beam is provided with a plurality of leakage holes, and the leakage holes are communicated with the annular channel.

[0014] The present application also provides a new energy vehicle, which includes the body frame structure described in any one of the above embodiments.

[0015] Compared with the prior art, the body frame structure and new energy vehicle provided by the present application, by setting an extension plate at the notch position of the connection between the first crossbeam and the longitudinal beam, the extension plate can be fitted and connected with the first crossbeam and the longitudinal beam, and the notch is sealed, which greatly improves the structural strength of the notch on the one hand, and on the other hand, when the threshold beam is connected to the first crossbeam and the longitudinal beam through the extension plate, the "rat hole" defect formed by the traditional process can be avoided, thereby greatly improving the sealing performance of the body. At the same time, the body frame structure formed after the connection is relatively simple and compact, which is conducive to optimizing the overall connection performance and layout space, thereby greatly improving the connection efficiency of the rear floor assembly and the front floor assembly, and greatly improving the torsional stiffness of the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 An exploded view of a vehicle body skeleton structure according to an embodiment of the present application;

[0018] Figure 2 A schematic structural diagram of a rear floor assembly according to an embodiment of the present application;

[0019] Figure 3 A side view of a rear floor assembly according to an embodiment of the present application;

[0020] Figure 4 A schematic diagram of the installation of an extension plate according to an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the structure of an extension plate according to an embodiment of the present application;

[0022] Figure 6 A partial structural schematic diagram of a vehicle body frame structure according to an embodiment of the present application;

[0023] Figure 7 A cross-sectional view of a vehicle body skeleton structure according to an embodiment of the present application.

[0024] The symbols in the figure mean the following:

[0025] 100. Vehicle body frame structure; 10. Rear floor assembly; 11. First annular body; 1101. Annular channel; 1102. Notch; 1103. Drainage gap; 1104. Leakage hole; 111. First cross beam; 1111. First side wall; 112. Second cross beam; 113. Longitudinal beam; 1131. Second side wall; 114. First connection area; 1141. Connection hole; 115. Second connection area; 1151. Mounting bracket; 20. Front floor assembly; 21. Second annular body; 211. Door sill beam; 212. Front enclosure frame; 22. Battery tray; 2201. Accommodation cavity; 23. Front floor panel; 30. Extension plate; 31. First bending plate; 32. Second bending plate; 33. Vertical plate. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0031] With the continuous development of new energy vehicles, the performance of the vehicle body has also been greatly improved. At present, in CTC integration technology, since the battery pack and the vehicle body need to be integrated, higher requirements are put forward for the sealing of the body in white, and the efficiency of the skeleton connection of the body in white must be further improved.

[0032] However, the traditional BIW skeleton structure is relatively simple to connect, and the components are relatively independent. For example, the rear end structure of the BIW skeleton is simply connected to the sill beam and the rear floor longitudinal beam to form the left and right side beam assemblies, and then the left and right side beam assemblies are spliced ​​through the crossbeam structure to form a simple ladder-shaped structure. This structure is affected by the processability of the components, and it is easy to form many "rat holes" at the joints, which not only has poor sealing performance, but also low connection efficiency, resulting in poor overall performance of the BIW.

[0033] See also Figure 1-Figure 7In order to solve the problems of poor sealing and low connection efficiency between parts in the existing body-in-white structure, the present application provides a body frame structure 100. The body frame structure 100 includes a rear floor assembly 10 and a front floor assembly 20. The rear floor assembly 10 includes a first crossbeam 111, a second crossbeam 112 and two longitudinal beams 113. The two longitudinal beams 113 are arranged between the first crossbeam 111 and the second crossbeam 112, and are respectively connected to the first crossbeam 111 and the second crossbeam 112 to form a first annular body 11. The first annular body 11 is provided with an annular channel 1101 extending along its own circumference. The outer wall of the annular channel 1101 located on the first crossbeam 111 is defined as a first side wall 1111, and the outer wall of the annular channel 1101 located on the longitudinal beam 113 is defined as a second side wall 1131. A notch 1102 is formed at the connection between the first side wall 1111 and the second side wall 1131. The front floor assembly 20 includes a door sill beam 211, and the vehicle body frame structure 100 also includes an extension plate 30, which is arranged at the notch 1102, and along the thickness direction of the extension plate 30, one side of the extension plate 30 is respectively attached to and connected to the bottom wall of the annular channel 1101, the inner wall of the first side wall 1111 and the inner wall of the second side wall 1131, and the other side is used for the door sill beam 211 to be erected and connected to the door sill beam 211.

[0034] It is understandable that the present application sets an extension plate 30 at the position of the notch 1102 at the connection between the first cross beam 111 and the longitudinal beam 113. The extension plate 30 can achieve a fitting connection between the first cross beam 111 and the longitudinal beam 113 and seal the notch 1102. On the one hand, the structural strength of the notch 1102 is greatly improved. On the other hand, when the threshold beam 211 is connected to the first cross beam 111 and the longitudinal beam 113 through the extension plate 30, the "rat hole" defect formed by the traditional process can be avoided, thereby greatly improving the sealing performance of the vehicle body. At the same time, the vehicle body frame structure 100 formed after the connection is relatively simple and compact, which is conducive to optimizing the overall connection performance and layout space, thereby greatly improving the connection efficiency of the rear floor assembly 10 and the front floor assembly 20, and greatly improving the torsional stiffness of the vehicle body.

[0035] Specifically, in the present application, the annular channel 1101 is a U-shaped groove structure with one end open, thereby facilitating the installation of other components in the annular channel 1101 and reducing the difficulty of installation.

[0036] In one embodiment, if Figure 4 , Figure 5 and Figure 7As shown, the extension plate 30 and the threshold beam 211 are both in a "J"-shaped structure. Since the "J"-shaped structure has multiple sides, it can effectively reduce the difficulty of fitting the extension plate 30 with the first side wall 1111 and the second side wall 1131, thereby improving the reliability of the overall connection. The threshold beam 211 is compatible with the extension plate 30 in shape, which also facilitates the connection between the threshold beam 211 and the extension plate 30.

[0037] Specifically, the extension plate 30 is installed sideways at the notch 1102, that is, the "J"-shaped opening of the extension plate 30 faces away from the first crossbeam 111. The extension plate 30 includes a first bending plate 31, a second bending plate 32, and a vertical plate 33 connecting the first bending plate 31 and the second bending plate 32. One side surface of the first bending plate 31 is attached to the bottom wall of the annular channel 1101, and the two ends of the vertical plate 33 are attached to the inner wall of the first side wall 1111 and the inner wall of the second side wall 1131, respectively. The end of the second bending plate 32 close to the second side wall 1131 is also attached to the inner wall of the second side wall 1131. Here, the first bending plate 31, the second bending plate 32 and the vertical plate 33 can be fixedly connected by spot welding.

[0038] Likewise, the end portion of the door sill beam 211 is inserted into the extension plate 30 and fixedly connected to the extension plate 30 by spot welding.

[0039] To further improve the sealing performance of the vehicle body frame structure 100 , in one embodiment, the first cross beam 111 , the second cross beam 112 and the two longitudinal beams 113 may be configured as an integrated structure, thereby reducing sealing defects caused by splicing.

[0040] The first cross beam 111, the second cross beam 112 and the two longitudinal beams 113 are preferably made of steel and are processed by an integrated hot forming process.

[0041] In one embodiment, if Figure 2 and Figure 3 As shown, from the direction of the second cross beam 112 to the first cross beam 111, the bottom wall of the annular channel 1101 at the notch 1102 tends to gradually decrease in height, thereby forming a slope. In this way, a certain height difference can be formed, thereby achieving a transition to the door sill beam 211, reducing the difficulty of connecting the door sill beam 211. At the same time, it is also beneficial to collect water at the notch 1102.

[0042] To discharge the collected water, in one embodiment, Figure 4 As shown, a drainage gap 1103 is formed between the extension plate 30, the first side wall 1111 and the bottom wall of the annular channel 1101. The threshold beam 211 is provided with drainage holes, which are arranged corresponding to and communicated with the drainage gap 1103.

[0043] Usually, the threshold beam 211 will form a relatively sealed chamber after being connected with other structures. At this time, by setting the drainage gap 1103 and opening corresponding drainage holes on the threshold beam 211, it is helpful to drain water into the cavity of the threshold beam 211 and then discharge it from the threshold beam 211, and the entire drainage process is safer and more reliable.

[0044] In one embodiment, if Figure 1 As shown, the front floor assembly 20 further includes a front enclosure frame 212, a front floor panel 23 and a battery tray 22. The front enclosure frame 212 is connected to one end of the door sill beam 211 away from the first cross beam 111, and the front enclosure frame 212, the two door sill beams 211 and the first cross beam 111 form a second annular body 21. The front floor panel 23 and the battery tray 22 are respectively arranged on both sides of the second annular body 21, and are both connected to the second annular body 21 to form a receiving cavity 2201 for installing the battery cell.

[0045] That is, the first annular body 11 and the second annular body 21 share the first cross beam 111, so that the two are arranged close to each other, which can effectively improve the utilization of space. At the same time, the two annular structures can greatly improve the connection performance of the body frame structure 100, thereby greatly improving the torsional rigidity of the body.

[0046] Furthermore, the rear floor assembly 10 also includes a rear floor panel (not shown), which is installed on one side of the first annular body 11 along the height direction of the vehicle body, wherein the other side of the first annular body 11 can be used to install the rear motor and chassis structural parts, etc.

[0047] As a preferred solution, the present embodiment sets the front floor panel 23 as an integrated structure, so that when the front floor panel 23 is connected to the second annular body 21, it can form a more sealed accommodation cavity 2201 structure with the battery tray 22. In this way, the safety of the electrical components such as the battery cells in the accommodation cavity 2201 can be greatly improved, so as to better adapt to the technical updates and iterations of the CTC structure (Cell to Chassis, battery chassis integrated design), and at the same time, it can also effectively improve the sound insulation effect of the vehicle body. The rear floor panel can be set as an integrated structure or a split structure according to actual needs, and can be reasonably set according to actual needs.

[0048] In one embodiment, if Figure 1 and Figure 6 As shown, a first connection area 114 is provided on the bottom wall of the annular channel 1101. The first connection area 114 is provided on the first cross beam 111 and extends to the connection between the first cross beam 111 and the longitudinal beam 113. Part of the battery tray 22 is connected to the first connection area 114. In this way, the contact area between the first cross beam 111 and the battery tray 22 can be increased, thereby achieving a reliable connection of the battery tray 22.

[0049] Specifically, the first connection area 114 is provided with a plurality of connection holes 1141 arranged at intervals to facilitate connection with the battery tray 22. Figure 1 and Figure 7 As shown, the rear of the battery tray 22 is connected to the first connection area 114 , the left and right sides of the battery tray 22 are respectively connected to two door sill beams 211 , and the front side of the battery tray 22 is connected to the front enclosure frame 212 .

[0050] It should be noted that the front of the battery tray 22 refers to the side close to the front of the vehicle along the length direction of the vehicle body, the rear of the battery tray 22 refers to the side close to the rear of the vehicle along the length direction of the vehicle body, and the left and right sides of the battery tray 22 refer to the corresponding sides along the width direction of the vehicle body.

[0051] Further, in one embodiment, if Figure 6 As shown, a second connection area 115 is further provided on the bottom wall of the annular channel 1101, and the second connection area 115 is provided at the connection between the first cross beam 111 and the longitudinal beam 113, and the second connection area 115 is provided behind the first connection area 114 and close to the first connection area 114. The rear floor assembly 10 further includes a chassis dowel rod (not shown), and the chassis dowel rod is connected to the second connection area 115.

[0052] In this way, by arranging the second connection area 115 close to the first connection area 114, the overall structure is more compact, which can further improve space utilization.

[0053] Specifically, a mounting bracket 1151 is provided on the second connection area 115, and the chassis dowel rod is installed on the second connection area 115 through the mounting bracket 1151. In order to improve the connection reliability of the mounting bracket 1151, the surrounding side of the mounting bracket 1151 can be connected and fixed to the inner wall of the first side wall 1111, the inner wall of the second side wall 1131 and the extension plate 30 respectively.

[0054] In one embodiment, if Figure 6 As shown, the first cross beam 111 is provided with a plurality of leakage holes 1104, which are connected to the annular channel 1101. In this way, the electrophoresis liquid after electrophoresis is easily discharged, and the drainage function can also be further realized, which is beneficial to improving the anti-corrosion performance of the vehicle body frame structure 100.

[0055] The present application also provides a new energy vehicle, which includes the vehicle body frame structure 100 of any one of the above embodiments.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A vehicle body frame structure, characterized in that: The invention comprises a rear floor assembly (10) and a front floor assembly (20), wherein the rear floor assembly (10) comprises a first cross beam (111), a second cross beam (112) and two longitudinal beams (113), wherein the longitudinal beam (113) is arranged between the first cross beam (111) and the second cross beam (112), and is respectively connected with the first cross beam (111) and the second cross beam (112) to form a first annular body (11), wherein the first annular body (11) is provided with an annular channel (1101) extending along its circumference, wherein the outer wall of the annular channel (1101) located on the first cross beam (111) is defined as a first side wall (1111), and the outer wall of the annular channel (1101) located on the longitudinal beam (113) is defined as a second side wall (1131), and a notch (1102) is formed at the connection between the first side wall (1111) and the second side wall (1131); The front floor assembly (20) includes a threshold beam (211), and the vehicle body frame structure also includes an extension plate (30), wherein the extension plate (30) is arranged at the notch (1102), and along the thickness direction of the extension plate (30), one side surface of the extension plate (30) is respectively attached to and connected to the bottom wall of the annular channel (1101), the inner wall of the first side wall (1111) and the inner wall of the second side wall (1131), and the other side surface is used for the threshold beam (211) to be mounted and connected to the threshold beam (211).

2. The vehicle body frame structure according to claim 1, characterized in that: The first cross beam (111), the second cross beam (112) and the two longitudinal beams (113) are an integrated structure.

3. The vehicle body frame structure according to claim 1, characterized in that: The extension plate (30) and the threshold beam (211) are both in a "J"-shaped structure.

4. The vehicle body frame structure according to claim 1, characterized in that: In the direction from the second crossbeam (112) to the first crossbeam (111), the bottom wall of the annular channel (1101) at the notch (1102) tends to gradually decrease in height.

5. The vehicle body frame structure according to claim 4, characterized in that: A drainage gap (1103) is formed between the extension plate (30), the first side wall (1111) and the bottom wall of the annular channel (1101); The threshold beam (211) is provided with a drainage hole, and the drainage hole is arranged corresponding to the drainage gap (1103) and is in communication with the drainage gap (1103).

6. The vehicle body frame structure according to claim 1, characterized in that: A first connection area (114) is provided on the bottom wall of the annular channel (1101), and the first connection area (114) is provided on the first cross beam (111) and extends to the connection between the first cross beam (111) and the longitudinal beam (113); Wherein, the front floor assembly (20) further includes a battery tray (22), and a portion of the battery tray (22) is connected to the first connection area (114).

7. The vehicle body frame structure according to claim 6, characterized in that: A second connection area (115) is also provided on the bottom wall of the annular channel (1101), and the second connection area (115) is provided at the connection between the first cross beam (111) and the longitudinal beam (113), and the second connection area (115) is provided behind the first connection area (114) and close to the first connection area (114); Wherein, the rear floor assembly (10) further comprises a chassis force transmission rod, and the chassis force transmission rod is connected to the second connection area (115).

8. The vehicle body frame structure according to claim 6, characterized in that: The front floor assembly (20) further comprises a front enclosure frame (212) and a front floor panel (23); the front enclosure frame (212) is connected to an end of the door sill beam (211) away from the first cross beam (111), and the front enclosure frame (212), the door sill beam (211) and the first cross beam (111) form a second annular body (21); The front floor panel (23) and the battery tray (22) are respectively arranged on both sides of the second annular body (21), and are both connected to the second annular body (21) to form a receiving cavity (2201) for installing the battery cell.

9. The vehicle body frame structure according to claim 1, characterized in that: The first crossbeam (111) is provided with a plurality of liquid leakage holes (1104), and the liquid leakage holes (1104) are in communication with the annular channel (1101).

10. A new energy vehicle, characterized in that: It comprises a vehicle body frame structure as described in any one of claims 1 to 9.

Images