Vehicle body framework structure and vehicle

Abstract

The utility model discloses a vehicle body framework structure and a vehicle, and relates to the technical field of vehicles, the vehicle body framework structure comprises a longitudinal beam assembly, a front longitudinal beam assembly and a rear longitudinal beam assembly, the longitudinal beam assembly comprises a middle longitudinal beam and a rear longitudinal beam which are connected; the cross beam assembly comprises a cross beam and a first connecting piece which are connected, the cross beam is connected with the middle longitudinal beam, and the middle longitudinal beam and the rear longitudinal beam are both connected with the first connecting piece. According to the technical scheme, the rigidity of the vehicle body framework structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle body frame structure and a vehicle. Background Art

[0002] The monocoque is a design that combines the body and frame into one, which makes it easier to achieve designs such as low chassis and large space, and provides a more comfortable riding experience.

[0003] The longitudinal beam assembly of a traditional load-bearing body is generally integrated. However, in new energy vehicles, due to the need to provide installation space for the battery pack, the longitudinal beam assembly generally cannot be arranged in an integrated manner and is often formed by connecting multiple longitudinal beam sections. This results in the body's skeleton structure having a problem of poor rigidity. Utility Model Content

[0004] The main purpose of the utility model is to provide a vehicle body frame structure and a vehicle, aiming to improve the rigidity of the vehicle body frame structure.

[0005] To achieve the above-mentioned purpose, the vehicle body frame structure proposed by the utility model includes:

[0006] A longitudinal beam assembly, including a middle longitudinal beam and a rear longitudinal beam connected to each other; and

[0007] The crossbeam assembly comprises a connected crossbeam and a first connecting member, wherein the crossbeam is connected to the middle longitudinal beam, and the middle longitudinal beam and the rear longitudinal beam are both connected to the first connecting member.

[0008] In one embodiment, the rear longitudinal beam comprises:

[0009] A first beam body, wherein one end of the first connecting member away from the cross beam connects the first beam body and the middle longitudinal beam; and

[0010] The second beam body connects the first beam body and the middle longitudinal beam.

[0011] In one embodiment, the first beam body and the middle longitudinal beam are spaced apart from each other along the height direction of the vehicle;

[0012] One end of the first connecting member away from the cross beam extends to between the first beam body and the middle longitudinal beam; and / or one end of the second beam body close to the first connecting member extends to between the first beam body and the middle longitudinal beam.

[0013] In one embodiment, the first connecting member comprises:

[0014] A first support body having a first end and a second end opposite to each other in the extending direction of the rear longitudinal beam;

[0015] A first flange, bent and connected to the first end and connected to the crossbeam; and

[0016] A second flange extends from the first end to the second end, connecting the middle longitudinal beam and the rear longitudinal beam.

[0017] In one embodiment, the longitudinal beam assembly further includes a front longitudinal beam bulkhead, wherein the front longitudinal beam bulkhead is attached to the upper side of the middle longitudinal beam, and the cross beam connects the front longitudinal beam bulkhead and the middle longitudinal beam.

[0018] In one embodiment, the crossbeam assembly further includes a second connecting member, which is disposed on a side of the crossbeam facing away from the first connecting member, and the second connecting member connects the crossbeam and the front longitudinal beam bulkhead.

[0019] In one embodiment, the second connecting member comprises:

[0020] a second supporting body having a third end and a fourth end opposite to each other in a direction perpendicular to the extension of the crossbeam;

[0021] A third flange, bent and connected to the third end, and connected to the front longitudinal beam bulkhead; and

[0022] A fourth flange extends from the third end to the fourth end and is connected to the crossbeam.

[0023] In one embodiment, the second connecting member further includes a fifth flange, and the fifth flange is bent and connected to the fourth end; the crossbeam includes:

[0024] A crossbeam body, connecting the front longitudinal beam bulkhead and the middle longitudinal beam, wherein the fourth flange is connected to the crossbeam body; and

[0025] The sixth flange is arranged at one end of the cross beam body away from the front longitudinal beam partition and is connected to the fifth flange.

[0026] In one embodiment, a groove is provided on a side of the cross beam facing away from the middle longitudinal beam, and the cross beam assembly further includes a reinforcement member, which extends in the same direction as the middle longitudinal beam and connects two opposite inner walls of the groove.

[0027] In one embodiment, the reinforcement member is disposed between the first connecting member and the second connecting member; and / or,

[0028] The reinforcement is connected to the bottom wall of the groove close to the center longitudinal beam.

[0029] In one embodiment, one end of the middle longitudinal beam close to the rear longitudinal beam extends obliquely in a direction away from the ground to form an installation space for the battery replacement battery pack below the rear longitudinal beam.

[0030] In one embodiment, the center longitudinal beam comprises:

[0031] a third beam body, connecting the cross beam assembly and the rear longitudinal beam, wherein one end of the third beam body close to the rear longitudinal beam extends obliquely in a direction away from the ground; and

[0032] The fourth beam body covers a side of the third beam body facing the installation space.

[0033] The utility model also provides a vehicle, comprising the above-mentioned vehicle body frame structure.

[0034] The vehicle body frame structure in the technical solution of the utility model connects the middle longitudinal beam and the rear longitudinal beam of the longitudinal beam assembly together through the first connecting member of the cross beam assembly, which reduces the possibility of connection failure between the middle longitudinal beam and the rear longitudinal beam, thereby improving the connection strength between the middle longitudinal beam and the rear longitudinal beam, and also reduces the possibility of deformation of the middle longitudinal beam and the rear longitudinal beam, thereby improving the rigidity of the longitudinal beam assembly; on the other hand, the cross beam of the cross beam assembly connects the middle longitudinal beam, and the first connecting member of the cross beam assembly connects the middle longitudinal beam and the rear longitudinal beam, thereby improving the connection strength between the cross beam assembly and the longitudinal beam assembly; on another hand, any one of the middle longitudinal beam, the rear longitudinal beam, the cross beam and the first connecting member is connected to at least the other two of them, so that the middle longitudinal beam, the rear longitudinal beam, the cross beam and the first connecting member form a frame structure, which not only reduces the possibility of connection failure or breakage of any component, thereby improving the strength of the vehicle body frame structure, but also reduces the possibility of deformation of the overall vehicle body frame structure, thereby improving the rigidity of the vehicle body frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of a vehicle body frame structure according to an embodiment of the present invention Figure 1 ;

[0037] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0038] Figure 3 An exploded view of an embodiment of a vehicle body skeleton structure provided by the utility model;

[0039] Figure 4 A structural schematic diagram of a first connecting member of a crossbeam assembly of a vehicle body frame structure provided by the utility model;

[0040] Figure 5 A schematic diagram of a vehicle body frame structure according to an embodiment of the present invention Figure 2 ;

[0041] Figure 6 A schematic structural diagram of a crossbeam assembly of a vehicle body frame structure provided by the utility model;

[0042] Figure 7 A structural schematic diagram of a second connecting member of a crossbeam assembly of a vehicle body frame structure provided by the utility model;

[0043] Figure 8 An exploded view of the longitudinal beam assembly of the vehicle body frame structure provided by the utility model.

[0044] Description of Figure Numbers:

[0045] 100, longitudinal beam assembly; 101, installation space; 110, middle longitudinal beam; 111, third beam body; 112, fourth beam body; 120, rear longitudinal beam; 121, first beam body; 122, second beam body; 130, front longitudinal beam bulkhead;

[0046] 200, crossbeam assembly; 210, crossbeam; 211, crossbeam body; 2111, groove; 212, sixth flange; 220, first connecting member; 221, first supporting body; 222, first flange; 223, second flange; 230, second connecting member; 231, second supporting body; 232, third flange; 233, fourth flange; 234, fifth flange; 240, reinforcement member; 241, reinforcement body; 242, seventh flange; 243, eighth flange.

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0049] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0050] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0051] In addition, if there are descriptions such as "first" and "second" in the embodiments of the utility model, the descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0052] The utility model provides a vehicle body frame structure.

[0053] See also Figures 1 to 3 , Figure 1 A schematic diagram of a vehicle body frame structure according to an embodiment of the present invention Figure 1 , Figure 2 for Figure 1 A partial enlarged view of the middle A. Figure 3 This is an exploded view of an embodiment of the vehicle body skeleton structure provided by the utility model.

[0054] In one embodiment of the present invention, the vehicle body frame structure comprises:

[0055] The longitudinal beam assembly 100 includes a middle longitudinal beam 110 and a rear longitudinal beam 120 connected to each other; and

[0056] The crossbeam assembly 200 includes a crossbeam 210 and a first connecting member 220 connected to each other. The crossbeam 210 is connected to the middle longitudinal beam 110 , and the middle longitudinal beam 110 and the rear longitudinal beam 120 are both connected to the first connecting member 220 .

[0057] The vehicle body frame structure in the technical solution of the utility model connects the middle longitudinal beam 110 and the rear longitudinal beam 120 of the longitudinal beam assembly 100 together through the first connecting member 220 of the cross beam assembly 200, thereby reducing the possibility of connection failure between the middle longitudinal beam 110 and the rear longitudinal beam 120, thereby improving the connection strength between the middle longitudinal beam 110 and the rear longitudinal beam 120, and also reducing the possibility of deformation of the middle longitudinal beam 110 and the rear longitudinal beam 120, thereby improving the rigidity of the longitudinal beam assembly 100; on the other hand, the cross beam 210 of the cross beam assembly 200 connects the middle longitudinal beam 110, and the first connecting member 220 of the cross beam assembly 200 connects the middle longitudinal beam 110 and the rear longitudinal beam 120. The middle longitudinal beam 110 and the rear longitudinal beam 120 improve the connection strength between the cross beam assembly 200 and the longitudinal beam assembly 100; on the other hand, any one of the middle longitudinal beam 110, the rear longitudinal beam 120, the cross beam 210 and the first connecting member 220 is connected to at least two of the other ones, so that the middle longitudinal beam 110, the rear longitudinal beam 120, the cross beam 210 and the first connecting member 220 form a frame structure, which reduces the possibility of connection failure or breakage of any component, thereby improving the strength of the body frame structure, and also reduces the possibility of deformation of the overall body frame structure, thereby improving the rigidity of the body frame structure.

[0058] Specifically in this embodiment, the vehicle body frame structure includes two longitudinal beam assemblies 100, and the cross beam 210 is arranged above the two longitudinal beam assemblies 100 and connects the two longitudinal beam assemblies 100. A first connecting member 220 is provided corresponding to each longitudinal beam assembly 100, so that the cross beam assembly 200 and the two longitudinal beam assemblies 100 form a frame structure, thereby improving the strength and rigidity of the vehicle body frame structure. Among them, the internal connection of the cross beam assembly 200, the internal connection of the longitudinal beam assembly 100, and the connection between the cross beam assembly 200 and the longitudinal beam assembly 100 can all be achieved by welding or bolt locking.

[0059] In one embodiment, the rear longitudinal beam 120 includes:

[0060] A first beam body 121, an end of a first connecting member 220 away from the cross beam 210 connects the first beam body 121 and the middle longitudinal beam 110; and

[0061] The second beam body 122 connects the first beam body 121 and the middle longitudinal beam 110 .

[0062] Combination Figures 1 to 3In an embodiment of the utility model, the rear longitudinal beam 120 includes a first beam body 121 and a second beam body 122 connected to each other, wherein the first connecting member 220 connects the middle longitudinal beam 110 and the first beam body 121, and the second beam body 122 is directly connected to the middle longitudinal beam 110. During specific assembly, the cross beam 210 and the first connecting member 220 are first welded to the middle longitudinal beam 110, and then the second beam body 122 of the rear longitudinal beam 120 is welded to the middle longitudinal beam 110, and finally the first beam body 121 of the rear longitudinal beam 120 is welded to the first connecting member 220 and the second beam body 122. By splitting the rear longitudinal beam 120 and then connecting it, the manufacturing difficulty of the rear longitudinal beam 120 and the assembly difficulty between the rear longitudinal beam 120 and the middle longitudinal beam 110 and the first connecting member 220 are reduced.

[0063] In one embodiment, the first beam body 121 and the middle longitudinal beam 110 are spaced apart from each other in the height direction of the vehicle;

[0064] One end of the first connecting member 220 away from the cross beam 210 extends between the first beam body 121 and the middle longitudinal beam 110 ; and / or one end of the second beam body 122 close to the first connecting member 220 extends between the first beam body 121 and the middle longitudinal beam 110 .

[0065] Combination Figure 2 , Figure 3 as well as Figure 8 In an embodiment of the utility model, the first beam body 121 and the middle longitudinal beam 110 are spaced apart in the height direction, and one end of the second beam body 122 close to the first connecting member 220 can extend between the first beam body 121 and the middle longitudinal beam 110 and connect the first beam body 121 and the middle longitudinal beam 110, that is, the first beam body 121 and the middle longitudinal beam 110 clamp one end of the second beam body 122 close to the first connecting member 220 in the middle, further reducing the possibility of connection failure or deformation between the middle longitudinal beam 110 and the rear longitudinal beam 120, thereby further improving the strength and rigidity of the longitudinal beam assembly 100. The end of the first connecting member 220 away from the cross beam 210 can also extend between the first beam body 121 and the middle longitudinal beam 110 and connect the first beam body 121 and the middle longitudinal beam 110, that is, the first beam body 121 and the middle longitudinal beam 110 clamp the end of the first connecting member 220 away from the cross beam 210 in the middle, further reducing the possibility of connection failure or deformation between the first connecting member 220 and the middle longitudinal beam 110 and the rear longitudinal beam 120, thereby further improving the strength and rigidity of the vehicle body frame structure.

[0066] In one embodiment, the first connecting member 220 includes:

[0067] The first support body 221 has a first end and a second end opposite to each other in the extending direction of the rear longitudinal beam 120;

[0068] A first flange 222 is bent and connected to the first end and connected to the crossbeam 210; and

[0069] The second flange 223 extends from the first end to the second end, connecting the middle longitudinal beam 110 and the rear longitudinal beam 120 .

[0070] Combination Figures 2 to 4 In the embodiment of the utility model, the first connecting member 220 includes a first supporting body 221, a first flange 222 and a second flange 223. The extension direction of the first supporting body 221 is the same as the extension direction of the rear longitudinal beam 120. The first supporting body 221 has a first end and a second end along its own extension direction. A first flange 222 is provided at the first end of the first supporting body 221. The first connecting member 220 is welded and fixed to the cross beam 210 through the first flange 222, thereby increasing the contact area and welding length between the first connecting member 220 and the cross beam 210, thereby improving the connection strength between the first connecting member 220 and the cross beam 210. A second flange 223 is provided on the bottom side of the first support body 221 facing the middle longitudinal beam 110, and the second flange 223 extends from the first end to the second end of the first support body 221. The first connecting member 220 is connected to the first beam body 121 of the rear longitudinal beam 120 and the middle longitudinal beam 110 through the second flange 223, thereby increasing the contact area and welding length between the first connecting member 220 and the middle longitudinal beam 110 and the first beam body 121, thereby improving the connection strength between the first connecting member 220 and the middle longitudinal beam 110 and the rear longitudinal beam 120.

[0071] In one embodiment, the longitudinal beam assembly 100 further includes a front longitudinal beam bulkhead 130 , which is attached to the upper side of the middle longitudinal beam 110 , and the cross beam 210 connects the front longitudinal beam bulkhead 130 and the middle longitudinal beam 110 .

[0072] Combination Figure 5 and Figure 8 In the embodiment of the utility model, the longitudinal beam assembly 100 further includes a front longitudinal beam bulkhead 130 connected to the front longitudinal beam, and the front longitudinal beam bulkhead 130 is attached to the upper side of the middle longitudinal beam 110 and welded to the middle longitudinal beam 110, so as to ensure the connection strength between the front longitudinal beam bulkhead 130 and the middle longitudinal beam 110 and improve the rigidity of the middle longitudinal beam 110. The cross beam 210 connects the front longitudinal beam bulkhead 130 and the middle longitudinal beam 110, reducing the possibility of connection failure between the front longitudinal beam bulkhead 130 and the middle longitudinal beam 110, thereby improving the strength of the longitudinal beam assembly 100; it also reduces the possibility of connection failure between the cross beam 210 and the middle longitudinal beam 110, thereby further improving the connection strength between the cross beam assembly 200 and the longitudinal beam assembly 100.

[0073] In one embodiment, the cross beam assembly 200 further includes a second connecting member 230 . The second connecting member 230 is disposed on a side of the cross beam 210 away from the first connecting member 220 . The second connecting member 230 connects the cross beam 210 and the front longitudinal beam bulkhead 130 .

[0074] Reference Figure 5 In the embodiment of the utility model, the cross beam assembly 200 further includes a second connecting member 230, which is arranged on the side of the cross beam 210 away from the first connecting member 220. The cross beam 210 and the front longitudinal beam bulkhead 130 are connected by the second connecting member 230, which further improves the connection strength between the cross beam 210 and the front longitudinal beam bulkhead 130. The cross beam 210, the second connecting member 230, the front longitudinal beam bulkhead 130 and the middle longitudinal beam 110 form a frame structure, which reduces the possibility of deformation of the cross beam assembly 200 and the longitudinal beam assembly 100, thereby improving the rigidity of the entire vehicle body skeleton structure.

[0075] In one embodiment, the second connecting member 230 includes:

[0076] The second supporting body 231 has a third end and a fourth end opposite to each other in a direction perpendicular to the extension direction of the beam 210;

[0077] The third flange 232 is bent and connected to the third end and connected to the front longitudinal beam partition 130; and

[0078] The fourth flange 233 extends from the third end to the fourth end and is connected to the crossbeam 210 .

[0079] Reference Figure 7 In the embodiment of the utility model, the second connecting member 230 includes a second supporting body 231, a third flange 232 and a fourth flange 233. The extension direction of the second supporting body 231 is perpendicular to the extension direction of the cross beam 210. The second supporting body 231 has a third end and a fourth end along its own extension direction. The third flange 232 is provided at the third end of the second supporting body 231. The second connecting member 230 is welded and fixed to the front longitudinal beam bulkhead 130 through the third flange 232, increasing the contact area and welding length between the second connecting member 230 and the front longitudinal beam bulkhead 130, thereby improving the connection strength between the second connecting member 230 and the front longitudinal beam bulkhead 130. A fourth flange 233 is provided on the side of the second support body 231 facing the beam 210, and the fourth flange 233 extends from the third end to the fourth end of the second support body 231. The second connecting member 230 is connected to the beam 210 through the fourth flange 233, thereby increasing the contact area and welding length between the second connecting member 230 and the beam 210, thereby improving the connection strength between the second connecting member 230 and the beam 210.

[0080] In one embodiment, the second connecting member 230 further includes a fifth flange 234, and the fifth flange 234 is bent and connected to the fourth end; the crossbeam 210 includes:

[0081] The cross beam body 211 connects the front longitudinal beam bulkhead 130 and the middle longitudinal beam 110 , and the fourth flange 233 connects the cross beam body 211 ; and

[0082] The sixth flange 212 is disposed at one end of the cross beam body 211 away from the front longitudinal beam bulkhead 130 and is connected to the fifth flange 234 .

[0083] Combination Figure 5 and Figure 7 In an embodiment of the utility model, the second connecting member 230 also includes a fifth flange 234, which is arranged at the fourth end of the second connecting member 230, and the crossbeam 210 includes a crossbeam body 211 and a sixth flange 212. The fourth flange 233 of the second connecting member 230 is connected to the crossbeam body 211, and the fifth flange 234 is connected to the sixth flange 212, further improving the connection strength between the second connecting member 230 and the crossbeam 210; on the other hand, the third end of the second supporting body 231 is connected to the front longitudinal beam bulkhead 130, and the fourth end is connected to the sixth flange 212, so that the second supporting member is supported between the sixth flange 212 of the crossbeam 210 and the front longitudinal beam bulkhead 130, thereby strengthening the supporting effect of the longitudinal beam assembly 100 on the crossbeam assembly 200, reducing the possibility of deformation of the entire vehicle body skeleton structure, and improving the rigidity of the vehicle body skeleton structure.

[0084] In one embodiment, a groove 2111 is provided on a side of the cross beam 210 away from the center longitudinal beam 110 . The cross beam assembly 200 further includes a reinforcement 240 . The reinforcement 240 extends in the same direction as the center longitudinal beam 110 and connects two opposite inner walls of the groove 2111 .

[0085] Reference Figure 5 In the embodiment of the utility model, a groove 2111 is provided on the side of the cross beam 210 away from the middle longitudinal beam 110, which reduces the weight of the cross beam 210 and is conducive to the lightweight of the entire vehicle body frame structure. The cross beam assembly 200 also includes a reinforcement 240, which is arranged inside the groove 2111 and connects two opposite inner walls of the groove 2111. The reinforcement 240 can enhance the strength and rigidity of the cross beam 210, thereby improving the strength and rigidity of the cross beam assembly 200.

[0086] In one embodiment, the reinforcement member 240 is disposed between the first connection member 220 and the second connection member 230; and / or,

[0087] The reinforcement member 240 is connected to the bottom wall of the groove 2111 close to the center longitudinal beam 110 .

[0088] Reference Figure 5 and Figure 6In an embodiment of the utility model, the reinforcement 240, the first connecting member 220 and the second connecting member 230 are arranged on the same straight line as a whole along the extension direction of the longitudinal beam assembly 100, and the reinforcement 240 is arranged between the first connecting member 220 and the second connecting member 230, which further reduces the possibility of deformation of the cross beam assembly 200; on the other hand, along the extension direction of the longitudinal beam assembly 100, the connection length of the longitudinal beam assembly 100 and the cross beam assembly 200 is increased, which further reduces the possibility of deformation of the cross beam assembly 200 and the longitudinal beam assembly 100, thereby improving the rigidity of the entire vehicle body frame structure.

[0089] Reference Figure 6 In the embodiment of the utility model, the reinforcement member 240 includes a reinforcement body 241 and a seventh flange 242 provided at both ends of the reinforcement body 241. The reinforcement member 240 connects the two inner walls of the groove 2111 through the seventh flanges 242 at both ends, thereby increasing the contact area and connection strength between the reinforcement member 240 and the cross beam 210. The reinforcement member 240 also includes an eighth flange 243, which is provided on the side of the reinforcement body 241 facing the bottom wall of the groove 2111. The reinforcement member 240 connects the bottom wall of the groove 2111 through the eighth flange 243, thereby further increasing the contact area and connection strength between the reinforcement member 240 and the cross beam 210.

[0090] Specifically in this embodiment, the assembly steps of the vehicle body frame structure include: first, welding the front longitudinal beam partition 130 to the middle longitudinal beam 110; second, welding the second beam body 122 of the rear longitudinal beam 120 to the middle longitudinal beam 110; then, welding the reinforcement 240, the first connecting member 220 and the second connecting member 230 to the cross beam 210 to form the cross beam assembly 200; then, assembling the cross beam assembly 200 with the longitudinal beam assembly 100, welding the second connecting member 230 and the front longitudinal beam partition 130, welding the cross beam 210 and the front longitudinal beam partition 130 as well as the cross beam 210 and the middle longitudinal beam 110, and welding the first connecting member 220 and the middle longitudinal beam 110; finally, assembling the first beam body 121 of the rear longitudinal beam 120, welding the first beam body 121 and the first connecting member 220 as well as the first beam body 121 and the second beam body 122. There are fewer assembly steps and the welding difficulty of each part is lower, which reduces the manufacturing difficulty of the entire body frame structure and improves the manufacturing efficiency of the body frame structure.

[0091] In one embodiment, one end of the middle longitudinal beam 110 close to the rear longitudinal beam 120 extends obliquely in a direction away from the ground to form an installation space 101 for the battery replacement battery pack below the rear longitudinal beam 120 .

[0092] Reference Figure 3In an embodiment of the utility model, one end of the middle longitudinal beam 110 close to the rear longitudinal beam 120 is inclined in a direction away from the ground, so that the height of the rear longitudinal beam 120 from the ground is greater than the height of the end of the middle longitudinal beam 110 away from the rear longitudinal beam 120 from the ground. An installation space 101 is formed under the rear longitudinal beam 120. On the one hand, it is convenient to arrange the battery pack of the vehicle for replacement, and on the other hand, it reduces the influence of the installation space 101 for setting the battery pack for replacement on the structural strength of the vehicle body frame.

[0093] In one embodiment, the center longitudinal beam 110 includes:

[0094] A third beam body 111 connects the cross beam assembly 200 and the rear longitudinal beam 120, and an end of the third beam body 111 close to the rear longitudinal beam 120 extends obliquely in a direction away from the ground; and

[0095] The fourth beam 112 covers a side of the third beam 111 facing the installation space 101 .

[0096] Reference Figure 8 In an embodiment of the utility model, the middle longitudinal beam 110 includes a third beam body 111 and a fourth beam body 112, the front longitudinal beam partition 130 is arranged above the third beam body 111, the rear longitudinal beam 120 is connected to the third beam body 111, and the fourth beam body 112 is covered on the side of the third beam body 111 facing the installation space 101, thereby improving the strength and rigidity of the third beam body 111, and further reducing the influence of the installation space 101 of the battery swap battery pack on the strength and rigidity of the vehicle body frame structure, while facilitating the connection with the installation structure of the battery swap battery pack.

[0097] The utility model also provides a vehicle, comprising the above-mentioned vehicle body frame structure.

[0098] The specific structure of the body frame structure refers to the above embodiment. Since the vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the vehicle can be a passenger car or a commercial vehicle. By adopting the above body frame structure, the load-bearing body of the vehicle has higher strength and rigidity, and is particularly suitable for application in new energy logistics vehicles, express delivery vehicles, etc.

[0099] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vehicle body frame structure, characterized in that: include: A longitudinal beam assembly, including a middle longitudinal beam and a rear longitudinal beam connected to each other; as well as The crossbeam assembly comprises a connected crossbeam and a first connecting member, wherein the crossbeam is connected to the middle longitudinal beam, and the middle longitudinal beam and the rear longitudinal beam are both connected to the first connecting member.

2. The vehicle body frame structure according to claim 1, characterized in that: The rear longitudinal beam comprises: A first beam body, wherein one end of the first connecting member away from the cross beam connects the first beam body and the middle longitudinal beam; and The second beam body connects the first beam body and the middle longitudinal beam.

3. The vehicle body frame structure according to claim 2, characterized in that: The first beam body and the middle longitudinal beam are spaced apart from each other along the height direction of the vehicle; One end of the first connecting member away from the cross beam extends to between the first beam body and the middle longitudinal beam; and / or one end of the second beam body close to the first connecting member extends to between the first beam body and the middle longitudinal beam.

4. The vehicle body frame structure according to claim 1, characterized in that: The first connecting member comprises: A first support body having a first end and a second end opposite to each other in the extending direction of the rear longitudinal beam; A first flange, bent and connected to the first end and connected to the crossbeam; and A second flange extends from the first end to the second end, connecting the middle longitudinal beam and the rear longitudinal beam.

5. The vehicle body frame structure according to claim 1, characterized in that: The longitudinal beam assembly also includes a front longitudinal beam bulkhead, which is attached to the upper side of the middle longitudinal beam, and the cross beam connects the front longitudinal beam bulkhead and the middle longitudinal beam.

6. The vehicle body frame structure according to claim 5, characterized in that: The crossbeam assembly also includes a second connecting member, which is arranged on a side of the crossbeam away from the first connecting member, and the second connecting member connects the crossbeam and the front longitudinal beam bulkhead.

7. The vehicle body frame structure according to claim 6, characterized in that: The second connecting member comprises: a second supporting body having a third end and a fourth end opposite to each other in a direction perpendicular to the extension of the crossbeam; A third flange, bent and connected to the third end, and connected to the front longitudinal beam bulkhead; and A fourth flange extends from the third end to the fourth end and is connected to the crossbeam.

8. The vehicle body frame structure according to claim 7, characterized in that: The second connecting member further includes a fifth flange, and the fifth flange is bent and connected to the fourth end; the crossbeam includes: A crossbeam body, connecting the front longitudinal beam bulkhead and the middle longitudinal beam, wherein the fourth flange is connected to the crossbeam body; and The sixth flange is arranged at one end of the cross beam body away from the front longitudinal beam partition and is connected to the fifth flange.

9. The vehicle body frame structure according to claim 6, characterized in that: A groove is provided on one side of the cross beam away from the middle longitudinal beam. The cross beam assembly further comprises a reinforcing member, which extends in the same direction as the middle longitudinal beam and connects two opposite inner walls of the groove.

10. The vehicle body frame structure according to claim 9, characterized in that: The reinforcement member is disposed between the first connecting member and the second connecting member; and / or, The reinforcement is connected to the bottom wall of the groove close to the center longitudinal beam.

11. The vehicle body frame structure according to any one of claims 1 to 10, characterized in that: One end of the middle longitudinal beam close to the rear longitudinal beam is inclined and extends away from the ground to form an installation space for the battery replacement battery pack below the rear longitudinal beam.

12. The vehicle body frame structure according to claim 11, characterized in that: The middle longitudinal beam comprises: a third beam body, connecting the cross beam assembly and the rear longitudinal beam, wherein one end of the third beam body close to the rear longitudinal beam extends obliquely in a direction away from the ground; and The fourth beam body covers a side of the third beam body facing the installation space.

13. A vehicle, characterized in that: It comprises the vehicle body frame structure as claimed in any one of claims 1 to 12.

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