Column structure, vehicle body frame and vehicle

Abstract

The utility model discloses a column structure, a vehicle body frame and a vehicle. The column structure comprises an outer plate assembly, an inner plate assembly and a hot air expansion pipe. The outer plate assembly and the inner plate assembly are connected to form a first force transmission cavity. The hot air expansion pipe is fixed in the first force transmission cavity in the length direction of the first force transmission cavity. According to the column structure, the hot air expansion pipe is arranged, the hot air expansion pipe, the outer plate assembly and the inner plate assembly form a double-cavity structure, the strength of the column structure is greatly improved, meanwhile, the width of the column body can be reduced, and the visual field of a driver in the driving process is improved.

Description

Technical Field

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

[0002] As there are more and more components in the vehicle, the weight of the whole vehicle is increasing, which leads to an increase in the vehicle collision energy. And in actual accidents, such as rear-ending a large truck, etc., the passenger compartment is squeezed, resulting in a very high mortality rate of passengers. Therefore, nowadays, vehicles have higher requirements for the load-bearing capacity of the passenger compartment. The column structure of the vehicle is an important safety load-bearing component of the passenger compartment, and its strength directly affects the safety level of the passenger compartment. And the column structure of the vehicle also affects the convenience of passengers getting in and out and the driver's vision when driving, etc.

[0003] The existing vehicle column structures have deficiencies in terms of their strength and space utilization, etc. Summary of the Utility Model

[0004] The purpose of this application is to provide a column structure and a vehicle with high strength and high space utilization rate.

[0005] This application discloses a column structure, which is applied to a vehicle body frame. The column structure includes an outer panel assembly, an inner panel assembly and a hot gas expansion tube;

[0006] The two long sides of the outer panel assembly are respectively connected to the two long sides of the inner panel assembly to form a first force transmission cavity; the hot gas expansion tube is arranged in the first force transmission cavity along the length direction of the first force transmission cavity.

[0007] Optionally, the outer panel assembly is provided with connection holes; the column structure further includes a connecting piece, a part of the connecting piece is fixedly connected to the outer panel assembly, and the other part of the connecting piece enters the connection hole and is fixedly connected to the hot gas expansion tube located in the first force transmission cavity.

[0008] Optionally, the number of the connection holes is multiple, and the multiple connection holes are arranged along the length direction of the outer panel assembly; some of the connection holes are first connection holes, and some of the connection holes are second connection holes; the first connection holes and the second connection holes are respectively arranged on two plate surfaces of the outer panel assembly, and the two plate surfaces are not coplanar.

[0009] Optionally, the column structure further includes at least one film; there is a gap between the outer panel assembly and the hot gas expansion tube, and the film is arranged in the gap.

[0010] Optionally, at least two parts of the hot gas expansion tube have different thicknesses.

[0011] Optionally, the outer panel assembly includes an outer A-pillar panel and an outer upper side member panel; the outer A-pillar panel and the outer upper side member panel are distributed along the length direction of the outer panel assembly and are connected to each other, and the outer A-pillar panel is closer to the head of the vehicle than the outer upper side member panel.

[0012] The thickness of the hot gas inflation tube in the first force transmission cavity corresponding to the outer A-pillar panel is a first thickness; the thickness of the hot gas inflation tube in the first force transmission cavity corresponding to the outer upper side member panel is a second thickness; the first thickness is greater than the second thickness.

[0013] Optionally, the average distance between the hot gas inflation tube and the outer panel assembly is greater than the average distance between the hot gas inflation tube and the inner panel assembly.

[0014] Optionally, the average distance between the hot gas inflation tube and the outer panel assembly is greater than 3 mm;

[0015] The average distance between the hot gas inflation tube and the inner panel assembly is greater than 4 mm.

[0016] The present application also discloses a vehicle body frame, and the vehicle body frame includes the above-mentioned column structure.

[0017] The present application also discloses a vehicle, and the vehicle includes the above-mentioned vehicle body frame.

[0018] Compared with the related art, the column structure of the present application is provided with a hot gas inflation tube, and the hot gas inflation tube and the outer panel assembly and the inner panel assembly form a double-chamber structure, greatly improving the strength of the column structure. At the same time, on the premise of ensuring sufficient strength, the width of the column can be appropriately reduced to improve the field of vision of the driver during driving.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0021] Figure 1 Schematic diagram of the vehicle body frame structure in an embodiment of the column structure of the present application.

[0022] Figure 2 Exploded view of the column structure in an embodiment of the column structure of the present application.

[0023] Figure 3 For Figure 2 Combined structural schematic diagram of the middle column structure.

[0024] Figure 4 For alongFigure 3 Schematic cross-sectional view along line A-A in [the figure].

[0025] Figure 5 Along Figure 3 Schematic cross-sectional view along line B-B in [the figure].

[0026] Figure 6 Along Figure 3 Schematic cross-sectional view along line C-C in [the figure].

[0027] Figure 7 Along Figure 3 Schematic cross-sectional view along line D-D in [the figure].

[0028] Figure 8 Along Figure 3 Schematic cross-sectional view along line E-E in [the figure].

[0029] Description of reference numerals: Outer panel assembly 100; Outer A-pillar panel 110; First joint part 114; Second joint part 115; Outer upper side member panel 120; Third joint part 121; First force transmission cavity 130; Connecting hole 140; First connecting hole 141; Second connecting hole 142; First flange 150; Connecting member 160; Hot gas expansion tube 200; Second force transmission cavity 210; Inner panel assembly 300; Inner A-pillar panel 310; Patch panel 320; Inner upper side member panel 330; Cross beam connecting plate 340; Second flange 350; Film 400. Detailed implementation manners

[0030] Here, the technical solutions in the embodiments (or "implementation manners") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements.

[0031] If there are terms related to directional indication or positional relationship in the embodiments of the present application (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0032] As Figure 1 And Figure 2 As shown, the present application provides a column structure 1000, which is applied to a vehicle body frame. The column structure 1000 includes an outer panel assembly 100, an inner panel assembly 300, and a hot gas expansion tube 200.

[0033] The two long sides of the outer panel assembly 100 are respectively connected to the two long sides of the inner panel assembly 300 to form a first force transmission cavity 130. The hot gas expansion tube 200 is disposed in the first force transmission cavity 130 along the length direction of the first force transmission cavity 130.

[0034] The column structure 1000 of the present application is provided with a hot gas expansion tube 200. The hot gas expansion tube 200 and the outer panel assembly 100 and the inner panel assembly 300 form a double cavity structure, greatly improving the strength of the column structure 1000. At the same time, on the premise of ensuring sufficient strength, the width of the column body can be appropriately reduced to improve the vision of the driver and passengers. Especially when the column structure 1000 is applied to the A-pillar, the width of the A-pillar can be appropriately reduced, reducing the blind area of the A-pillar and improving the vision of the driver during driving.

[0035] The following will detail each embodiment of the present application that conforms to the above creative concept.

[0036] As Figure 1 and Figure 2 shown, an embodiment of the present application discloses a column structure 1000. The column structure 1000 includes an outer panel assembly 100 and an inner panel assembly 300 that are oppositely arranged. Among them, the outer panel assembly 100 is disposed outside the inner panel assembly 300. Here, the inside and outside are referenced to the vehicle. The space for the driver and passengers to ride in the vehicle is the inner side mentioned above, and the outside of the vehicle is the outer side mentioned above. The outer panel assembly 100 is connected to the inner panel assembly 300 to form a first force transmission cavity 130. Specifically, one long side of the outer panel assembly 100 close to the upper side of the vehicle is connected to one long side of the inner panel assembly 300 close to the upper side of the vehicle, and one long side of the outer panel assembly 100 close to the lower side of the vehicle is connected to one long side of the inner panel assembly 300 close to the lower side of the vehicle, finally forming a first force transmission cavity 130 extending along the length direction of the column structure 1000.

[0037] As Figure 2 and Figure 4 shown, in an alternative embodiment, the outer panel assembly 100 includes a first flanging 150 located at the edge of the outer panel assembly 100, and the inner panel assembly 300 includes a second flanging 350 located at the edge of the inner panel assembly 300. Specifically, one long side of the outer panel assembly 100 close to the lower side of the vehicle and one long side close to the upper side of the vehicle are both provided with the first flanging 150, and one long side of the inner panel assembly 300 close to the lower side of the vehicle and one long side close to the upper side of the vehicle are both provided with the second flanging 350. The outer panel assembly 100 and the inner panel assembly 300 are welded and connected through the first flanging 150 and the second flanging 350 to form a closed first force transmission cavity 130. Optionally, the first flanging 150 and the second flanging 350 can have a size greater than 15 mm to ensure the connection between the outer panel assembly 100 and the inner panel assembly 300 is strong enough.

[0038] As Figure 2 andFigure 4 As shown, the column structure 1000 further includes a hot gas expansion tube 200, which is fixed in the first force transmission cavity 130 along the length direction of the first force transmission cavity 130. The hot gas expansion tube 200 itself has a second force transmission cavity 210 with a closed cross-section.

[0039] The hot gas expansion tube 200 is manufactured by a hot gas expansion process. The hot gas expansion process includes process steps of tube making - tube bending - pre-pressing and forming with a mold - blank heating - mold clamping and pressing - inflating and hot expanding - cooling and quenching - laser cutting. Among them, in the tube making link, seamless tubes are made of materials with different materials and material thicknesses. For example, a steel plate can be selected as the blank, and then through uncoiling - shearing and welding - loop - leveling - forming - welding and scar removal - cooling - finishing - speed measurement - straightening - tube cutting and blanking, a finished seamless steel tube is obtained. In the tube bending link, the made seamless steel tube is placed in a special tube bending mold, and a bending moment is applied to the tube through hydraulic or electric drive to form it into the required bent shape. In the pre-pressing and forming with a mold link, the bent seamless pipe fitting is placed in the inner cavity of the mold, and through the upper and lower molds clamping and pressing, the pipe is pre-formed to make it initially formed into the required shape, facilitating the subsequent entry of the hot gas expansion mold into the mold. In the blank heating link, the pre-formed pipe fitting is placed in a heating furnace and heated to austenitization by resistance heating, controlling the heating rate and the maximum temperature to ensure the optimization of the pipe structure and performance. In the mold clamping and pressing link, the heated pipe fitting is placed in a closed mold cavity, and a high pressure is applied to further form the pipe into the required final shape under the action of the mold. In the inflating and hot expanding link, high-pressure gas is injected into the inner cavity of the mold. Optionally, the air pressure of the high-pressure gas can be about 50 Mpa - 70 Mpa. Through the internal cavity gas expansion, the outer surface of the part is fitted with the mold to form the final shape of the part. In the cooling and quenching link, the formed pipe fitting is taken out of the mold and subjected to rapid cooling treatment such as water quenching or oil quenching, and the part is rapidly cooled and quenched through the mold water channel to form a martensite structure. In the laser cutting link, the laser cuts off the excess material of the part, forms holes and polygons, thus forming the final part state. During the preparation process, various parameters are controlled so that the change rate of the cross-sectional perimeter of the hot gas expansion tube 200 after gas expansion is less than or equal to 13%, and preferably, the change rate of the cross-sectional perimeter of the hot gas expansion tube 200 after gas expansion is controlled within 8% - 12%. The strength of the material used for the hot gas expansion tube 200 in this application can reach about 2 Gpa.

[0040] As Figures 2 to 8As shown, the outer panel assembly 100 is provided with connection holes 140. The column structure 1000 further includes a connecting member 160. A part of the connecting member 160 is fixedly connected to the outer panel assembly 100, and another part of the connecting member 160 enters the connection hole 140 and is fixedly connected to the heat-expandable tube 200 located in the first force transmission cavity 130. During the manufacturing process of the column structure 1000, the outer panel assembly 100 and the heat-expandable tube 200 are fixedly connected by using the connecting member 160. Specifically, at least part of the connecting member 160 enters the connection hole 140 and is fixedly connected to the heat-expandable tube 200, and another part is fixedly connected to the outer panel assembly 100 through the wall surface of the connection hole 140 and / or the end surface of the outer panel assembly 100 away from the heat-expandable tube 200. Then, the outer panel assembly 100 is connected to the inner panel assembly 300. Optionally, the connection hole 140 can be an elliptical hole of 6*12 mm or other shaped holes with an area equivalent to that of the elliptical hole of 6*12 mm. Such a size of the hole ensures the connection strength between the outer panel assembly 100 and the heat-expandable tube 200 without affecting the strength of the outer panel assembly 100. In this embodiment, the outer panel assembly 100 and the heat-expandable tube 200 can be connected by welding. At this time, the connecting member 160 can be solder. Of course, in other embodiments, the outer panel assembly 100 and the heat-expandable tube 200 can also be connected by bonding. At this time, the connecting member 160 can be a certain viscous substance. The heat-expandable tube 200 and the connection hole 140 and the outer panel assembly 100 around the connection hole 140 have an overlap of at least 7 mm to make the welding more convenient and stable.

[0041] The number of the connection holes 140 can be multiple, and the multiple connection holes 140 are arranged along the length direction of the outer panel assembly 100. Some of the multiple connection holes 140 are first connection holes 141, and some of the connection holes 140 are second connection holes 142. The first connection holes 141 and the second connection holes 142 are respectively arranged on two adjacent plate surfaces of the outer panel assembly 100, and the two plate surfaces are not coplanar. In this embodiment, the number of both the first connection holes 141 and the second connection holes 142 is multiple. Specifically, the multiple first connection holes 141 are arranged on one plate surface of the outer panel assembly 100 along the length direction of the outer panel assembly 100. The multiple second connection holes 142 are arranged on a plate surface adjacent to the first connection holes 141 of the outer panel assembly 100 along the length direction of the outer panel assembly 100. By arranging the connection holes 140 in this way, the connection strength between the outer panel assembly 100 and the heat-expandable tube 200 is enhanced through the spatially staggered connection points, and the excessive heat concentration during welding is prevented from causing excessive deformation of the outer panel assembly 100 and the heat-expandable tube 200 by distributing the connection holes 140 on two surfaces.

[0042] Optionally, the distance between two adjacent first connection holes 141 among the multiple first connection holes 141 is a first distance, the distance between two adjacent second connection holes 142 among the multiple second connection holes 142 is a second distance, and the distance between an adjacent first connection hole 141 and second connection hole 142 is a third distance. The first distance is equal to the second distance, and the first distance and the second distance are greater than the third distance. This setting not only ensures a certain connection strength between the outer panel assembly 100 and the hot gas expansion tube 200 at each position, but also maximally prevents excessive deformation of the outer panel assembly 100 and the hot gas expansion tube 200 caused by excessive heat concentration during welding due to too many connection holes 140. The equality here can be an equality in a non-strict sense. Due to process and other reasons, there can be a certain error between the first distance and the second distance, and a difference less than 10% between the two can be understood as the two being equal. Specifically, for example, the first distance and the second distance can be any value between 200 mm and 300 mm, and the third distance can be any value between 40 mm and 50 mm.

[0043] The distance between the part of the hot gas expansion tube 200 near the connection hole 140 and the outer panel assembly 100 is relatively close, and they are fixedly connected through the connecting member 160 and the outer panel assembly 100. The hot gas expansion tube 200 maintains a certain spacing from the outer panel assembly 100 at other positions far from the connection hole 140. Each part of the hot gas expansion tube 200 maintains a certain spacing from the inner panel assembly 300. The average distance of the hot gas expansion tube 200 from the outer panel assembly 100 is greater than the average distance of the hot gas expansion tube 200 from the inner panel assembly 300. That is, the hot gas expansion tube 200 is located on the side closer to the outer panel assembly 100 within the first force transmission cavity 130. In this way, the inner panel assembly 300 can have a larger space for installing structures such as interior decoration, wiring harness, and restraint systems. Specifically, for example, the average distance of the hot gas expansion tube 200 from the outer panel assembly 100 can be greater than 3 mm, and the average distance of the hot gas expansion tube 200 from the inner panel assembly 300 can be greater than 4 mm. The average distance of the hot gas expansion tube 200 from the inner panel assembly 300 being greater than 4 mm means that the average distance between the inner panel assembly 300 and the hot gas expansion tube 200 is greater than 4 mm after structures such as interior decoration, wiring harness, and restraint systems are installed.

[0044] In some cases, in order to keep the cross-sectional shape of the hot gas expansion tube 200 smooth and the perimeter deformation rate meet the requirements, the hot gas expansion tube 200 may be too close to the outer panel assembly 100 at the non-connection part (i.e., the position far from the connection hole), resulting in only a small gap between the outer panel assembly 100 and the hot gas expansion tube 200 at this place. At this time, a film 400 can be set in this gap to avoid direct contact between the outer panel assembly 100 and the hot gas expansion tube 200 through the film 400, so as to prevent the outer panel assembly 100 and the hot gas expansion tube 200 from colliding during vehicle driving, which may affect driving safety or generate abnormal noises. Optionally, the length and width of the film 400 can be 10 mm and 8 mm, and the thickness of the film 400 can be 2 - 3 mm.

[0045] As Figures 1 to 3 shown, the outer panel assembly 100 may include the A-pillar outer panel 110 and the upper side member outer panel 120. The A-pillar outer panel 110 and the upper side member outer panel 120 are distributed along the length direction of the outer panel assembly 100 and are connected to each other. The A-pillar outer panel 110 is closer to the head of the vehicle than the upper side member outer panel 120. The A-pillar outer panel 110 and the upper side member outer panel 120 are welded to form the outer panel assembly 100. A first joint part 114 is provided on one side of the A-pillar outer panel 110 close to the head of the vehicle, and the A-pillar outer panel 110 is connected to the A-pillar lower panel 500 through the first joint part 114. A second joint part 115 is provided on one side of the A-pillar outer panel 110 close to the tail of the vehicle, and the A-pillar outer panel 110 is connected to the B-pillar 600 through the second joint part 115. A third joint part 121 is provided on one side of the upper side member outer panel 120 close to the tail of the vehicle, and the upper side member outer panel 120 is connected to the C-pillar 700 through the third joint part 121. Optionally, the A-pillar outer panel 110 can be formed by hot stamping with 1500 Mpa material, and the upper side member outer panel 120 can be formed by cold stamping with 590 Mpa material. Both the A-pillar outer panel 110 and the upper side member outer panel 120 are provided with connection holes 140 and first flanges 150. The connection holes 140 of the A-pillar outer panel 110 and the upper side member outer panel 120 together constitute the connection hole 140 structure of the entire outer panel assembly 100, and the first flanges 150 of the A-pillar outer panel 110 and the upper side member outer panel 120 together constitute the first flange 150 structure of the entire outer panel assembly 100.

[0046] The inner panel assembly 300 may include an A-pillar inner panel 310, an upper side member inner panel 330, and a cross-member connecting plate 340. The positions of the A-pillar inner panel 310 and the upper side member inner panel 330 correspond to the positions of the A-pillar outer panel 110 and the upper side member outer panel 120. The A-pillar inner panel 310 and the upper side member inner panel 330 are distributed along the length direction of the inner panel assembly 300 and are connected to each other. The A-pillar inner panel 310 is closer to the head of the vehicle than the upper side member inner panel 330. The cross-member connecting plate 340 is connected to one side of the A-pillar inner panel 310 close to the tail of the vehicle. The A-pillar inner panel 310 is fixedly connected to the cross-member 800 of the vehicle through the cross-member connecting plate 340. The A-pillar inner panel 310 can be formed by hot stamping with a 1500 Mpa material, and the upper side member inner panel 330 can be formed by cold stamping with a 590 Mpa material. Optionally, a patch panel 320 is provided on one side of the A-pillar inner panel 310 close to the outer panel assembly 100. The strength of the patch panel 320 is greater than that of the A-pillar inner panel 310, and the length of the patch panel 320 is less than the length of the A-pillar inner panel 310. For example, the patch panel 320 can be formed with a material having a strength of 2 Gpa. During the manufacturing process of the inner panel assembly 300, the patch panel 320 can be first connected to the A-pillar inner panel 310 by pressing and other measures, and then the A-pillar inner panel 310 is connected to the upper side member inner panel 330 and the cross-member connecting plate 340 by welding and other methods. The A-pillar inner panel 310 and the upper side member inner panel 330 are both provided with a second flanging 350. The second flangings 350 of the A-pillar inner panel 310 and the upper side member inner panel 330 together form the second flanging 350 structure of the entire inner panel assembly 300.

[0047] The hot gas expansion tube 200 has at least two parts with different thicknesses. Specifically, the cross-sectional width, thickness, strength, material, etc. of each part of the hot gas expansion tube 200 can be customized according to actual needs. For example, in the tube manufacturing process, blanks with different cross-sectional widths, thicknesses, strengths, and materials can be selected, and after shearing and welding and subsequent steps, seamless tubes with different cross-sectional widths, thicknesses, strengths, and materials can be made, and then hot gas expansion tubes 200 with different cross-sectional widths, thicknesses, strengths, and materials can be made. Another example is that in the mold pre-forming - blank heating - mold clamping and pressing - inflation and thermal expansion molding process, hot gas expansion tubes 200 with different cross-sectional widths and thicknesses at each part can be obtained by designing different molds. Since the cross-sectional width, thickness, and material of each part of the hot gas expansion tube 200 can be customized, the strength of each part can naturally also be customized.

[0048] For example, in an alternative embodiment, the thickness of the hot gas expansion tube 200 within the first force transfer cavity 130 corresponding to the outer panel 110 of the A-pillar is a first thickness. The thickness of the hot gas expansion tube 200 within the first force transfer cavity 130 corresponding to the outer panel 120 of the upper side member is a second thickness. The first thickness is greater than the second thickness. During a vehicle collision, the A-pillar of the vehicle is the most vulnerable area. With the first thickness being greater than the second thickness, the A-pillar area of the vehicle is strengthened, enhancing the safety level of the cockpit. Specifically, the first thickness can be 2.3 mm - 2.7 mm, and the second thickness can be 1.2 mm - 1.6 mm.

[0049] By providing the hot gas expansion tube 200, the column structure 1000 of the present application forms a double cavity structure with the outer panel assembly 100 and the inner panel assembly 300. Compared with the column structure without the hot gas expansion tube 200, the axial force resistance is increased by 20% - 30%, the torsional capacity is increased by 35% - 40%, and the bending capacity is increased by 10% - 20%. At the same time, the present application uses the outer panel 110 of the A-pillar, the inner panel 310 of the A-pillar, and the relatively thick hot gas expansion tube 200 with higher strength from the position of the vehicle rearview mirror to the position of the upper side member, enabling the column structure 1000 in this section to be made narrower, greatly improving the field of vision during driving. Moreover, the hot gas expansion tube 200 of the present application runs through from the position of the vehicle rearview mirror to the connection position of the upper side member C-pillar, increasing the degree of integration of the body frame, such that when the vehicle is subjected to a collision, the collision energy can be better transmitted to the entire body frame. Compared with the traditional body frame formed by welding and splicing, the present application can better achieve the overall force of the body, avoiding local damage caused by local force.

[0050] In the above embodiment, the column structure 1000 is applied to the A-pillar structure. Of course, in other embodiments, the column structure 1000 can also be applied to the B-pillar or the upper cross member of the vehicle frame, which can also reduce the width of the column and improve the field of vision of the driver and passengers.

[0051] The present application also discloses a body frame, which includes the above-mentioned column structure.

[0052] The present application also discloses a vehicle, which includes the above-mentioned body frame.

[0053] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A column structure, applied to a vehicle body frame, characterized in that: The column structure includes an outer plate assembly, an inner plate assembly and a hot air expansion tube; The two long sides of the outer plate assembly are respectively connected with the two long sides of the inner plate assembly to form a first force transmission cavity; the hot air expansion tube is arranged in the first force transmission cavity along the length direction of the first force transmission cavity.

2. The column structure according to claim 1, characterized in that The outer panel assembly is provided with a connecting hole; the column structure also includes a connecting piece, a part of which is fixedly connected to the outer panel assembly, and another part of which enters the connecting hole and is fixedly connected to the hot air expansion tube located in the first force transmission cavity.

3. The column structure according to claim 2, characterized in that: There are multiple connecting holes, and the multiple connecting holes are arranged along the length direction of the outer panel assembly; some of the connecting holes are first connecting holes, and other parts of the connecting holes are second connecting holes; the first connecting holes and the second connecting holes are respectively arranged on two plate surfaces of the outer panel assembly, and the two plate surfaces are not coplanar.

4. The column structure according to claim 2, characterized in that: The column structure also includes at least one film; there is a gap between the outer panel assembly and the hot air expansion tube, and the film is arranged in the gap.

5. The column structure according to claim 1, characterized in that The hot air expansion tube has at least two locations with different thicknesses.

6. The column structure according to claim 5, characterized in that The outer panel assembly includes an A-pillar outer panel and an upper side beam outer panel; the A-pillar outer panel and the upper side beam outer panel are distributed along the length direction of the outer panel assembly and are connected to each other, and the A-pillar outer panel is closer to the head of the vehicle than the upper side beam outer panel; The thickness of the hot air expansion tube in the first force transmission cavity corresponding to the A-pillar outer panel is a first thickness; the thickness of the hot air expansion tube in the first force transmission cavity corresponding to the upper side beam outer panel is a second thickness; the first thickness is greater than the second thickness.

7. The column structure according to claim 1, characterized in that The average distance between the hot air expansion tube and the outer panel assembly is greater than the average distance between the hot air expansion tube and the inner panel assembly.

8. The column structure according to claim 7, characterized in that The average distance between the hot air expansion tube and the outer panel assembly is greater than 3 mm; The average distance between the hot air expansion tube and the inner panel assembly is greater than 4 mm.

9. A vehicle body frame, characterized in that: The vehicle body frame includes the pillar structure according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle includes the vehicle body frame as claimed in claim 9.

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