A car body frame structure

Abstract

The present invention discloses a vehicle body frame structure, which relates to the technical field of automobile body structure. The vehicle body frame structure comprises a third pipe, at least three first pipes and at least two second pipes, wherein at least three first pipes are arranged at intervals in the first direction, at least two second pipes are arranged at intervals in the second direction, and the first direction and the second direction are perpendicular to each other; each second pipe is connected with each first pipe by mortise and tenon; a third pipe is arranged between two adjacent second pipes, and the third pipe comprises at least three pipe sections, at least three pipe sections are sequentially connected along the second direction, and at least three first pipes and at least three pipe sections are connected by mortise and tenon in a one-to-one correspondence. In the vehicle body frame structure, only two adjacent pipe sections need to be fixedly connected, and the rest are connected by mortise and tenon, which greatly reduces the external fixing points, and the assembly process is simple, most of the pipes can be disassembled and restored, and the impact resistance and fatigue resistance are good.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile body structures, and in particular to a body frame structure. Background Art

[0002] At present, there are many skeleton structures in automobile bodies. The skeleton is mainly composed of beams and columns, and a large number of cross structures are formed between these beams and columns. Traditional skeleton structures mostly adopt cross-section welding structures, that is, the cross grid skeleton is all made of long and short straight pipe parts, and the structure is welded at the joints, which increases a large number of welds. These welds greatly increase the tooling cost, processing cost, and processing cycle of the body production, and cause the surface to be uneven, affecting the overall appearance.

[0003] With the requirements of automobile power performance and environmental protection and energy saving, lightweight design of the car body has become a factor that must be considered in all car body designs, so the use of aluminum alloy and carbon fiber materials has received more and more attention. However, aluminum alloy has great challenges to traditional welding processes due to its shortcomings such as easy oxidation, high thermal conductivity and specific heat capacity, large linear expansion coefficient, and easy volatility of alloy elements. Carbon fiber materials cannot be connected using traditional welding methods. Therefore, in order to reduce the number of welds and welding points, the mortise and tenon structure has become a very necessary connection method. The mortise and tenon structure of the car body frame in the prior art mainly adopts the mortise and tenon cavity beam structure, that is, the cross beam (column) has a hole, and the column (cross beam) passes through the middle, and finally welding is used to ensure the position fixation and strength. This mortise and tenon structure has the problems of incomplete positioning, many welds, high manufacturing cost, long manufacturing cycle and non-detachable parts, resulting in poor impact resistance and fatigue resistance of the car body frame. Summary of the invention

[0004] The object of the present invention is to provide a vehicle body frame structure, which has a simple assembly process, requires a small number of fixing points, most parts can be disassembled and restored, and has good impact resistance and fatigue resistance.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A vehicle body frame structure, comprising:

[0007] At least three first pipes, wherein the at least three first pipes are spaced apart in a first direction;

[0008] At least two second pipes, at least two of which are spaced apart in a second direction, the first direction and the second direction are perpendicular to each other; each of the second pipes is connected to each of the first pipes by mortise and tenon joints;

[0009] A third pipe fitting, wherein one third pipe fitting is arranged between each adjacent two second pipe fittings, wherein the third pipe fitting comprises at least three pipe sections, wherein at least three pipe sections are sequentially connected along the second direction, and at least three first pipe fittings and at least three pipe sections are connected in one-to-one mortise and tenon joints.

[0010] Optionally, a plurality of first mortises are arranged at intervals on the first pipe member, a plurality of second mortises are arranged at intervals on the second pipe member, a third mortise is arranged on the pipe section, and both the second mortise and tenon and the third mortise can be connected to the first mortise and tenon joints.

[0011] Optionally, the directions of the two first tongues and grooves of two adjacent first tubes mating with the second tube are opposite; the directions of the two second tongues and grooves of two adjacent second tubes mating with the same first tube are the same.

[0012] Optionally, the two third tongues and grooves of two adjacent pipe sections are oriented in opposite directions.

[0013] Optionally, the cross-sections of the first pipe fitting, the second pipe fitting and the third pipe fitting are all in the shape of a Japanese character.

[0014] Optionally, the vehicle body frame structure also has a third direction, which is perpendicular to the first direction and the second direction; along the third direction, the first tube has an A1 surface and an A2 surface that are relatively set, the second tube has a B1 surface and a B2 surface that are relatively set, and the third tube has a C1 surface and a C2 surface that are relatively set, and the A1 surface, the B1 surface and the C1 surface can be flush and the A2 surface, the B2 surface and the C2 surface can be flush.

[0015] Optionally, the first tube, the second tube and the third tube all extend in a straight line direction or an arc direction.

[0016] Optionally, two adjacent pipe sections are connected by welding.

[0017] Optionally, the first pipe fitting, the second pipe fitting and the third pipe fitting are all round pipes or square pipes.

[0018] Beneficial effects of the present invention: The vehicle body frame structure provided by the present invention forms a mesh structure by connecting the first pipe fitting, the second pipe fitting and the third pipe fitting with cross mortise and tenon joints. Only two adjacent pipe sections in the third pipe fitting need to be fixedly connected, and the rest are connected by mortise and tenon joints. Compared with the prior art, the external fixing points are greatly reduced, the assembly process is simple, most of the pipe fittings can be disassembled and restored, and the impact resistance and fatigue resistance are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1is a schematic diagram of a vehicle body skeleton structure provided by an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a first pipe member provided in an embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of a second pipe provided by an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of a third pipe fitting provided in an embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the first mortise and tenon groove and the second mortise and tenon joint provided by an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the first mortise and tenon joints and the second mortise and tenon joints provided by an embodiment of the present invention.

[0025] In the figure:

[0026] 1-first pipe member; 11-first tongue and groove; 12-A1 surface; 13-A2 surface;

[0027] 2- second pipe member; 21- second tongue and groove; 22- B1 surface; 23- B2 surface;

[0028] 3-third pipe fitting; 31-pipe joint; 311-third mortise and tenon; 32-C1 surface; 33-C2 surface. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] like Figure 1 As shown, the vehicle frame structure includes a third pipe 3, at least three first pipes 1 and at least two second pipes 2, wherein at least three first pipes 1 are arranged at intervals in the first direction, and at least two second pipes 2 are arranged at intervals in the second direction, and the first direction and the second direction are perpendicular to each other; each second pipe 2 is connected to each first pipe 1 by mortise and tenon joints; a third pipe 3 is arranged between two adjacent second pipes 2, and the third pipe 3 includes at least three pipe sections 31, and at least three pipe sections 31 are connected in sequence along the second direction, and at least three first pipes 1 and at least three pipe sections 31 are connected by mortise and tenon joints one by one. It can be understood that the vehicle frame structure is a mesh structure formed by the first pipe 1 being connected to the second pipe 2 and the third pipe 3 by cross mortise and tenon joints, wherein only two adjacent pipe sections 31 in the third pipe 3 need to be fixedly connected, and the rest are connected by mortise and tenon joints. Compared with the prior art, the external fixing points are greatly reduced, and the assembly process is simple, most of the pipes can be disassembled and restored, and the impact resistance and fatigue resistance are good.

[0035] In this embodiment, in order to increase the reliability and aesthetics of the vehicle body frame structure, the spacing between two adjacent first pipes 1 is equal, and the spacing between adjacent second pipes 2 and third pipes 3 is also equal and equal to the spacing between two adjacent first pipes 1. In other embodiments, the above spacings may not be equal, as long as the connection is reliable.

[0036] Specifically, in this embodiment, the mortise and tenon joints between the first pipe 1 and the second pipe 2 and between the first pipe 1 and the pipe section 31 are all pure mortise and tenon joints. In other embodiments, welding or gluing can be added on the basis of the mortise and tenon joints to further increase the strength of the connection according to the required strength of the vehicle body frame structure.

[0037] Optionally, two adjacent pipe sections 31 are connected by welding. In this embodiment, there are four first pipe fittings 1, two second pipe fittings 2 and two third pipe fittings 3, so there are eight pipe sections 31 and six welding points. When the pipe fittings are disassembled, only six welding points need to be destroyed, and the first pipe fitting 1 and the second pipe fitting 2 can be guaranteed to be intact; while the prior art adopts the form of welding or mortise and tenon cavity beam structure, and its welding points are much larger than six, which is not conducive to the disassembly of the pipe fittings and leads to poor surface flatness and affects the appearance. In other embodiments, the number of the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 can be appropriately increased according to the different required vehicle body frame structures. Two adjacent pipe sections 31 can also be fixedly connected in other ways.

[0038] Alternatively, if Figure 2-4 As shown, the first pipe 1 is provided with a plurality of first mortises 11 at intervals, the second pipe 2 is provided with a plurality of second mortises 21 at intervals, and the pipe section 31 is provided with a third mortise 311, and both the second mortise 21 and the third mortise 311 can be connected with the first mortise 11 by mortise and tenon joints. Figure 5 As shown, when the first pipe 1 and the second pipe 2 are connected by mortise and tenon, the opening directions of the first mortise groove 11 and the second mortise groove 21 are relatively mortise and tenon, which can ensure a reliable connection; similarly, the third mortise groove 311 and the first mortise groove 11 are also connected by mortise and tenon. Figure 5 In other embodiments, other mortise and tenon joint forms may be selected according to the different required vehicle body frame structures.

[0039] Alternatively, if Figure 1 As shown, the two first tongues and grooves 11 of two adjacent first pipes 1 and second pipes 2 are in opposite directions; the two second tongues and grooves 21 of two adjacent second pipes 2 and the same first pipe 1 are in the same direction. Figure 2 and 3As shown, in order to ensure the convenience of processing, in this embodiment, the two adjacent first mortises 11 on the first pipe 1 are oriented in opposite directions, and the two adjacent second mortises on the second pipe 2 are also oriented in opposite directions. At the same time, in order to ensure the reliability of the body frame structure, after the mortise and tenon connection, there is no first mortise 11 and second mortise 21 that are not mortised between the two adjacent first mortise 11 and second mortise 21. In other embodiments, the mortise and tenon positions of the first pipe 1 and the second pipe 2 can be appropriately adjusted; the directions of the two first mortise 11 of the two adjacent first pipes 1 and the second pipe 2 and the directions of the two second mortise 21 of the two adjacent second pipes 2 and the same first pipe 1 can also be changed, but it is necessary to ensure that there is at least one group of two adjacent first mortise 11 on the first pipe 1 that are oriented in opposite directions for mortise and tenon connection with the second pipe 2, and the second pipe 2 can also be set in the same way.

[0040] In order to facilitate the processing of the first pipe 1 and the second pipe 2 and make the vehicle body frame structure more beautiful, in this embodiment, the first pipe 1 and the second pipe 2 have the same shape and size and can be processed and produced in the same batch. In other embodiments, the shape and size of the first pipe 1 and the second pipe 2 can be changed according to different needs.

[0041] Optionally, the directions of the two third tenons 311 of two adjacent pipe sections 31 are opposite. In this embodiment, by setting the directions of the first tenon 11, the second tenon 21 and the third tenon 311, the reliability of the vehicle body frame structure can be improved, thereby improving the impact resistance and fatigue resistance of the vehicle body frame. In other embodiments, the directions of the first tenon 11, the second tenon 21 and the third tenon 311 can also be set to the same direction or in other ways.

[0042] Alternatively, if Figure 2-4 As shown, the vehicle body frame structure also has a third direction, which is perpendicular to the first direction and the second direction; along the third direction, the first tube 1 has an A1 surface 12 and an A2 surface 13 arranged oppositely, the second tube 2 has a B1 surface 22 and a B2 surface 23 arranged oppositely, and the third tube 3 has a C1 surface 32 and a C2 surface 33 arranged oppositely, and the A1 surface 12, the B1 surface 22 and the C1 surface 32 can be flush, and the A2 surface 13, the B2 surface 23 and the C2 surface 33 can be flush. Figure 6 As shown, after the first mortise and tenon grooves are mortised with the second mortise and tenon grooves, the A1 surface 12 and the B1 surface 22 can be flush. In this embodiment, after the first pipe 1, the second pipe 2 and the third pipe 3 of the vehicle body frame structure are mortised and tenoned, the surface of the entire vehicle body frame structure can remain flat, which can not only improve the connection strength but also contribute to the overall aesthetics. In other embodiments, the A1 surface 12, the B1 surface 22 and the C1 surface 32 may not be kept flush, and the A2 surface 13, the B2 surface 23 and the C2 surface 33 may not be kept flush.

[0043] Alternatively, if Figure 5 and 6 As shown, the cross-sections of the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are all in the shape of a Japanese character. In this embodiment, the groove depth of the first mortise 11 is set to half the cross-sectional length of the first pipe fitting 1, the groove depth of the second mortise 21 is set to half the cross-sectional length of the second pipe fitting 2, and the groove depth of the third mortise 311 is set to half the cross-sectional length of the third pipe fitting 3. Since the cross-sections are all in the shape of a Japanese character, when the groove depth is set to half the cross-sectional length, it can ensure that the cross-section of the mortise is a plane, which can prevent stress concentration after the two pipe fittings are mortised, and can avoid wear between the two pipe fittings that are mortised to each other. In other embodiments, the cross-sections of the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 can also be set to other shapes, and the cross-sections of the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 can also be different, as long as the connection is reliable.

[0044] In this embodiment, the pipe sections 31 are all cut from the first pipe fitting 1 or the second pipe fitting 2. Figure 4 As shown, the pipe section 31 can be cut into two structures. The third pipe fitting 3 obtained by connecting them in sequence has the same length as the first pipe fitting 1 and the second pipe fitting 2, which is beneficial to improving the aesthetics of the vehicle body frame structure and is beneficial to the processing and production of the mortise and tenon, ensuring that the first mortise and tenon 11, the second mortise and tenon 21 and the third mortise and tenon 311 are the same size, thereby improving the connection strength of the mortise and tenon joints.

[0045] Optionally, the first pipe 1, the second pipe 2 and the third pipe 3 all extend in a straight line direction or an arc direction. In this embodiment, the first pipe 1, the second pipe 2 and the third pipe 3 are all straight lines. In other embodiments, the first pipe 1, the second pipe 2 and the third pipe 3 can be set to other shapes such as arc lines according to different required vehicle body frame structures.

[0046] Optionally, the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are all round tubes or square tubes. In this embodiment, the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are all square tubes. In other embodiments, the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 can also be round tubes or processed by extrusion and other processes, and the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 can all be made of different materials according to the requirements of force bearing and processing and welding performance.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vehicle body frame structure, characterized in that: include: At least three first pipe members (1), wherein the at least three first pipe members (1) are arranged at intervals in a first direction; At least two second pipe members (2), at least two of the second pipe members (2) are arranged at intervals in a second direction, the first direction and the second direction are perpendicular to each other; each of the second pipe members (2) is connected to each of the first pipe members (1) by mortise and tenon joints; a third pipe member (3), wherein one third pipe member (3) is disposed between each of two adjacent second pipe members (2), wherein the third pipe member (3) comprises at least three pipe sections (31), wherein the at least three pipe sections (31) are sequentially connected along the second direction, and at least three first pipe members (1) and at least three pipe sections (31) are connected in a one-to-one mortise and tenon manner; Two adjacent pipe sections (31) are connected by welding; The first pipe member (1) is provided with a plurality of first tenon grooves (11) at intervals, the second pipe member (2) is provided with a plurality of second tenon grooves (21) at intervals, the pipe section (31) is provided with a third tenon groove (311), and both the second tenon groove (21) and the third tenon groove (311) can be connected to the first tenon groove (11) by mortise and tenon joints; The two first tongues and grooves (11) of two adjacent first pipe members (1) and the second pipe members (2) are oriented in opposite directions; the two second tongues and grooves (21) of two adjacent second pipe members (2) and the same first pipe member (1) are oriented in the same direction; The two third tongues and grooves (311) of two adjacent pipe sections (31) are oriented in opposite directions.

2. The vehicle body frame structure according to claim 1, characterized in that: The cross-sections of the first pipe fitting (1), the second pipe fitting (2) and the third pipe fitting (3) are all in the shape of a Japanese character.

3. The vehicle body frame structure according to claim 1, characterized in that: The vehicle body frame structure further has a third direction, the third direction being perpendicular to the first direction and the second direction; along the third direction, the first tube (1) has an A1 surface (12) and an A2 surface (13) arranged opposite to each other, the second tube (2) has a B1 surface (22) and a B2 surface (23) arranged opposite to each other, and the third tube (3) has a C1 surface (32) and a C2 surface (33) arranged opposite to each other, the A1 surface (12), the B1 surface (22) and the C1 surface (32) being able to be flush, and the A2 surface (13), the B2 surface (23) and the C2 surface (33) being able to be flush.

4. The vehicle body frame structure according to claim 1, characterized in that: The first pipe member (1), the second pipe member (2) and the third pipe member (3) all extend in a straight line direction or an arc direction.

5. The vehicle body frame structure according to claim 1, characterized in that: The first pipe fitting (1), the second pipe fitting (2) and the third pipe fitting (3) are all round pipes or square pipes.

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