CN210284375U - An A-pillar and car - Google Patents

Abstract

The utility model discloses an A-pillar, which is composed of an A-pillar main beam of an integrally formed hollow aluminum profile tubular structure and an A-pillar outer plate of carbon fiber material; extending to form a flange, and the flange extends along the axial direction of the A-pillar main beam; the A-pillar outer panel extends along the axial direction of the A-pillar main beam, and the A-pillar outer panel has a first skirt and a second skirt , wherein the first skirt edge glue riveting is connected to the surface of the A-pillar main beam, the second skirt edge glue riveting is connected to the flange, and a cavity is formed around the A-pillar outer plate and the surface of the A-pillar main beam. The utility model is based on the ultra-high rigidity performance of carbon fiber and the good section designability and good bending and torsion resistance of the aluminum alloy profile, and cooperates with the glue riveting process between the two to form a closed structure through the glue riveting of the profile and the carbon fiber parts. The rigidity of the A-pillar part of the vehicle is enhanced, the collision safety performance of the whole vehicle is improved, and the driving safety and driving experience of the vehicle are guaranteed.

Description

An A-pillar and car

technical field

The utility model relates to the field of automobile manufacturing, in particular to an A-pillar and an automobile using the A-pillar.

Background technique

Due to the demand for lightweight automobiles, the materials and structures used in various parts of the automobile body have undergone great changes compared with traditional automobiles. Moreover, while considering the light weight, it is also necessary to ensure the sufficient strength of the vehicle structure, which requires corresponding improvements to the various parts in the body structure, especially the columns, beams and other structures used in the frame structure.

Utility model content

The purpose of the utility model is to provide an A-pillar, which utilizes the A-pillar main beam of the hollow aluminum profile tubular structure and the A-pillar outer plate of carbon fiber material to ensure the strength of the A-pillar.

Another object of the present invention is to provide an automobile using the above-mentioned A-pillar to improve the safety of the automobile.

The specific scheme of the present utility model is as follows:

An A-pillar, the A-pillar is composed of an A-pillar main beam of an integrally formed hollow aluminum profile tubular structure and an A-pillar outer plate of carbon fiber material;

A flange is formed by extending one side wall of the A-pillar main beam to the outside of the A-pillar main beam, and the flange extends along the axial direction of the A-pillar main beam;

The A-pillar outer panel extends along the axial direction of the A-pillar main beam, and the A-pillar outer panel has a first skirt and a second skirt, wherein the first skirt is glued and riveted to the side. On the surface of the A-pillar main beam, the second skirt is glued and riveted to the flange, and a cavity is formed around the A-pillar outer plate and the surface of the A-pillar main beam.

Further, the A-pillar outer panel also has a top cover, a first side cover and a second side cover; wherein,

The top cover part is not in contact with the surface of the A-pillar main beam;

The first side cover portion is formed by extending from one side of the top cover portion to the side wall surface of the A-pillar main beam, and the end portion of the first side cover portion away from the top cover portion is along the A the surface of the side wall of the column main beam extends to form the first skirt;

The second side cover portion is formed by extending from the other side of the top cover portion opposite to the first side cover portion toward the flange, and the end of the second side cover portion away from the top cover portion a portion extending along the flange surface to form the second skirt;

The cavity is formed by surrounding surfaces of the first side cover portion, the top cover portion, the second side cover portion and the A-pillar main beam.

Further, the A-pillar main beam has:

a first side wall, the first side wall is connected with the first skirt by glue riveting;

a second side wall, the second side wall is formed by extending a side of the first side wall away from the first side cover part in a direction away from the first skirt, and the second side wall is connected to the The included angle towards the inner side of the A-pillar main beam between the first side walls is an obtuse angle;

a third side wall, the third side wall is formed by extending the side of the second side wall away from the first side wall, and the direction between the third side wall and the second side wall is The included angle inside the main beam of the A-pillar is an obtuse angle;

a fourth side wall, the fourth side wall is formed by extending the side of the third side wall away from the second side wall, and the direction between the fourth side wall and the third side wall is The included angle inside the main beam of the A-pillar is an obtuse angle;

a fifth side wall, the fifth side wall is formed by extending the side of the fourth side wall away from the third side wall, and the direction between the fifth side wall and the fourth side wall is The included angle inside the main beam of the A-pillar is an obtuse angle;

a sixth side wall, the sixth side wall is formed by extending the side of the fifth side wall away from the fourth side wall, and the direction between the sixth side wall and the fifth side wall is The included angle inside the main beam of the A-pillar is an obtuse angle;

a seventh side wall, the seventh side wall is formed by extending the side of the sixth side wall away from the fifth side wall, and the direction between the seventh side wall and the sixth side wall is The included angle inside the main beam of the A-pillar is an obtuse angle;

an eighth side wall, the eighth side wall is formed by extending a side of the seventh side wall away from the sixth side wall, and the eighth side wall is formed by extending a side away from the seventh side wall The angle between the first side wall, the eighth side wall and the seventh side wall toward the inner side of the A-pillar main beam is an acute angle, and the angle between the first side wall and the eighth side wall is an acute angle. The angle toward the inside of the main beam of the A-pillar is the reflex angle.

Further, the flange is formed by extending the surface of the fifth side wall to the outer side of the A-pillar main beam;

The surface of the sixth side wall faces the cavity.

Further, the A-pillar main beam also has:

a reinforcing rib, the reinforcing rib is formed by extending oppositely from the inner surface of the fourth side wall and the inner surface of the first side wall, and the reinforcing rib extends along the axial direction of the A-pillar main beam, The tubular structure of the main beam of the A-pillar is divided into two tube chambers by the reinforcing rib.

Further, the included angle between the second side wall and the first side wall toward the inner side of the A-pillar main beam is 105° to 115°;

The included angle between the third side wall and the second side wall toward the inner side of the A-pillar main beam is 135° to 145°;

The included angle between the fourth side wall and the third side wall toward the inner side of the A-pillar main beam is 110° to 120°;

The included angle between the fifth side wall and the fourth side wall toward the inner side of the A-pillar main beam is 115° to 125°;

The included angle between the sixth side wall and the fifth side wall toward the inner side of the A-pillar main beam is 135° to 145°;

The included angle between the seventh side wall and the sixth side wall toward the inner side of the A-pillar main beam is 115° to 125°;

The included angle between the eighth side wall and the seventh side wall toward the inner side of the main beam of the A-pillar is 70° to 80°;

The included angle between the first side wall and the eighth side wall toward the inner side of the main beam of the A-pillar is 90° to 100°;

The thickness of the side wall of the A-pillar main beam is 4 mm to 5 mm.

Further, the included angle between the first side cover and the first skirt is 95° to 105°;

The included angle between the top cover part and the first side cover part is 75° to 85°;

The included angle between the second side cover and the second skirt is 95° to 105°;

The included angle between the top cover part and the second side cover part is 85° to 95°.

Further, the shortest distance from the outer surface of the fourth side wall to the transition of the seventh side wall and the eighth side wall is 55 cm to 65 cm;

The shortest distance from the outer surface of the second side wall to the transition of the fifth side wall and the sixth side wall is 55 cm to 65 cm.

An automobile adopts the A-pillar as described in any one of the above.

The A-pillar of the utility model is composed of an aluminum alloy profile and a carbon fiber material to form a closed cavity structure. Based on the ultra-high stiffness and strength properties of carbon fiber and the good section designability and good bending and torsion resistance of the aluminum alloy profile, the combination of the two The glue riveting process between the two parts enhances the rigidity of the A-pillar part of the car through the closed structure formed by the glue riveting of the profiles and carbon fiber parts, thereby improving the collision safety performance of the whole vehicle. Due to the small cross-sectional area of the A-pillar main beam, Thereby, the blind spot of the car is reduced. Due to the irregular structure of the A-pillar main beam, the glue riveting connection structure and the cavity structure between the A-pillar main beam and the A-pillar outer panel, the stability of the body frame is assisted to enhance. , to ensure the driving safety and driving experience of the vehicle.

Description of drawings

The following drawings merely illustrate and explain the present invention schematically, and do not limit the scope of the present invention.

1 is a schematic diagram of a first cross-sectional structure of an A-pillar according to an embodiment of the present invention;

2 is a schematic diagram of a second cross-sectional structure of an A-pillar according to an embodiment of the present invention;

3 is a schematic diagram of a third cross-sectional structure of an A-pillar according to an embodiment of the present invention;

4 is a schematic cross-sectional structural diagram of an A-pillar main beam in an A-pillar according to an embodiment of the present invention.

Label description

1. A-pillar main beam

101. The first side wall

102. Second side wall

103. Third side wall

104. Fourth side wall

105. Fifth side wall

106. Sixth side wall

107. Seventh side wall

108. Eighth side wall

109. Flange

110. Reinforcing ribs

2. A-pillar outer panel

201. Top cover

202. The first side cover

203. Second side cover

204, first skirt

205、Second skirt

3. Cavity

4. Structural parts

5. Structural adhesive

6. Blind rivets

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

As used herein, "schematic" means "serving as an example, instance, or illustration" and any illustration, embodiment described herein as "schematic" should not be construed as a preferred or advantageous one Technical solutions.

In order to make the drawings concise, only the relevant parts of the present invention are schematically shown in each drawing, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked.

In this document, "first", "second", etc. are only used to distinguish each other, but do not indicate the degree of importance and order, and the premise of mutual existence.

In this paper, "equal", "same" and the like are not limitations in strict mathematical and/or geometric senses, and also include errors that can be understood by those skilled in the art and allowed by manufacturing or use. Unless otherwise indicated, numerical ranges herein include not only the entire range between its two endpoints, but also several subranges subsumed therein.

1 , 2 and 3 respectively show the cross-sectional structures of the A-pillars at different positions according to the embodiments of the present invention. In order to match the structure of different parts of the car body, the cross-sectional structure of the A-pillar at different positions is slightly different.

As shown in Figures 1, 2, and 3, the A-pillar of the embodiment of the present invention is composed of an A-pillar main beam 1 of an integrally formed hollow aluminum profile tubular structure and an A-pillar outer plate 2 of carbon fiber material. A flange 109 is formed by extending one side wall of the A-pillar main beam 1 to the outside of the A-pillar main beam 1 , and the flange 109 extends along the axial direction of the A-pillar main beam 1 . The A-pillar outer panel 2 extends along the axial direction of the A-pillar main beam 1, and the A-pillar outer panel 2 has a first skirt 204 and a second skirt 205, wherein the first skirt 204 is glue-riveted to the A-pillar On the surface of the main beam 1, the second skirt 205 is glued and riveted to the flange 109 (shown in FIG. 1), and the second skirt 205 is also glued and riveted to other structural members 4 (shown in FIG. 3, see the following description) , a cavity 3 is formed around the surface of the A-pillar outer panel 2 and the A-pillar main beam 1 .

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the A-pillar outer panel 2 further has a top cover portion 201 , a first side cover portion 202 and a second side cover portion 203 . The top cover part 201 is not in contact with the surface of the A-pillar main beam 1, and a first side cover part 202 is formed by extending one side of the top cover part 201 to the side wall surface of the A-pillar main beam 1, and the first side cover part 202 is far away The end of the top cover portion 201 extends along the side wall surface of the A-pillar main beam 1 to form a first skirt 204 . A second side cover part 203 is formed by extending the other side flange 109 of the top cover part 201 opposite to the first side cover part 202 , and the end of the second side cover part 203 away from the top cover part 201 is along the surface of the flange 109 A second skirt 205 is formed by extension. The cavity 3 is formed around the surfaces of the first side cover part 202 , the top cover part 201 , the second side cover part 203 and the A-pillar main beam 1 .

In an optional embodiment, it is not necessary to extend the flange 109 at all positions of the one side wall of the A-pillar main beam 1, and the setting of the position of the flange 109 needs to be determined according to the structural design of the vehicle. In the embodiment, the flange 109 is formed at the cross-sectional position shown in FIG. 1 , while the flange 109 is not formed at the cross-sectional position shown in FIG. 2 and FIG. 3 , especially in FIG. 3 . , due to the requirements of the structural design of the vehicle, the second skirt 205 of the A-pillar outer panel 2 needs to be fixed with other structural members 4 other than the A-pillar in the embodiment of the present invention, so there is no need to form a flange at the corresponding position 109.

Figure 2 shows the cross-sectional structure of the main beam 1 of the A-pillar. As shown in Figures 1 and 2, in the embodiment of the present invention, the interface of the main beam 1 of the A-pillar is an irregular polygonal structure. Specifically, the A-pillar main beam 1 has a first side wall 101 , a second side wall 102 , a third side wall 103 , a fourth side wall 104 , a fifth side wall 105 , a sixth side wall 106 , and a seventh side wall 107 and the eighth side wall 108 . Wherein, the first side wall 101 is connected with the first skirt 204 by glue riveting; the second side wall 102 is formed by extending the side of the first side wall 101 away from the first side cover 202 in a direction away from the first skirt 204 , And the included angle between the second side wall 102 and the first side wall 101 toward the inner side of the A-pillar main beam 1 is an obtuse angle; the third side wall 103 extends from the side of the second side wall 102 away from the first side wall 101 . The angle between the third side wall 103 and the second side wall 102 toward the inner side of the A-pillar main beam 1 is an obtuse angle; The angle between the fourth side wall 104 and the third side wall 103 toward the inner side of the A-pillar main beam 1 is an obtuse angle; the fifth side wall 105 is formed by the fourth side wall 104 away from the third side wall 103 One side is extended, and the included angle between the fifth side wall 105 and the fourth side wall 104 toward the inner side of the A-pillar main beam 1 is an obtuse angle; the sixth side wall 106 is separated from the fourth side wall by the fifth side wall 105 One side of 104 is extended, and the angle between the sixth side wall 106 and the fifth side wall 105 toward the inside of the A-pillar main beam 1 is an obtuse angle; the seventh side wall 107 is separated from the fifth side wall 106 by the sixth side wall 106. One side of the side wall 105 is extended, and the angle between the seventh side wall 107 and the sixth side wall 106 toward the inner side of the A-pillar main beam 1 is an obtuse angle; the eighth side wall 108 is away from the seventh side wall 107 One side of the sixth side wall 106 is extended, and the side of the eighth side wall 108 away from the seventh side wall 107 is extended to form the first side wall 101 . The space between the eighth side wall 108 and the seventh side wall 107 is formed. The included angle toward the inner side of the A-pillar main beam 1 is an acute angle, and the included angle between the first side wall 101 and the eighth side wall 108 toward the inner side of the A-pillar main beam 1 is a reflex angle.

Regarding the glue riveting connection, as shown in FIG. 2 , the first skirt 204 is first glued to the outer surface of the first side wall 101 of the A-pillar main beam 1 through the structural glue 5 , and then through the blind rivet 6 on the basis of glueing The first skirt 204 and the first side wall 101 are riveted together. The second skirt 205 and the flange 109 are first glued together by the structural glue 5 , and then riveted together by the blind rivets 6 on the basis of the glue. Since the position of the blind rivet between the second skirt 205 and the flange 109 and the position of the blind rivet 6 between the first skirt 204 and the first side wall 101 are not in the same cross-section, the respective figures show The rivet structure used for the glue riveting connection between the second skirt 205 and the flange 109 is not shown in the figure. Those skilled in the art can know how to use the glue riveting structure between the first skirt 204 and the first side wall 101. The glue riveting structure at the second skirt 205 and the flange 109 is realized. The cross-section of the structure shown in FIG. 1 just does not intercept the blind rivet, so the blind rivet structure is not included in the structure shown in FIG. 1 .

In an optional embodiment, as shown in FIG. 3 , in the part without the flange 109 , the second skirt 205 and other structural members 4 can be connected by adhesive bonding, that is, the second skirt 205 is connected by the structural adhesive 5 . It is glued to the structural member 4, or, in the part without the flange 109, the second skirt 205 and other structural members 4 can also be connected by glue riveting, that is, the second skirt 205 is first glued by the structural glue 5. On the outer surface of the structural member 4, on the basis of gluing, the second skirt 205 and the structural member 4 are riveted together by blind rivets. The glue riveting connection structure of the second skirt 205 and the structural member 4 can refer to FIG. 2 The glue riveting connection structure between the first skirt 204 and the first side wall 101 is shown. As shown in FIG. 1 , the flange 109 is formed by extending the surface of the fifth side wall 105 to the outside of the A-pillar main beam 1 . The surface of the sixth side wall 106 faces the cavity 3 . In the embodiment shown in FIG. 1, the flange 109, the sixth side wall 106, the seventh side wall 107, the eighth side wall 108, part of the first side wall 101, the first side cover part 202, the top cover part 201 and the The second side cover portion 203 surrounds the cavity 3 .

Continuing to refer to FIG. 1 , FIG. 2 , and FIG. 3 , the A-pillar main beam 1 also has a reinforcing rib 110 . And the reinforcing rib 110 extends along the axial direction of the A-pillar main beam 1 , so that the tubular structure of the A-pillar main beam 1 is divided into two tube chambers by the reinforcing rib 110 . The stiffener 110 increases the moment of inertia and the moment of section of the entire section.

In an optional embodiment, the included angle between the second side wall 102 and the first side wall 101 toward the inner side of the A-pillar main beam 1 is 105° to 115°, preferably 110.82°; The angle between the two side walls 102 toward the inner side of the A-pillar main beam 1 is 135° to 145°, preferably 141.52°; the angle between the fourth side wall 104 and the third side wall 103 toward the inner side of the A-pillar main beam 1 The included angle is 110° to 120°, preferably 113.89°; the included angle between the fifth side wall 105 and the fourth side wall 104 toward the inside of the A-pillar main beam 1 is 115° to 125°, preferably 118° The angle between the sixth side wall 106 and the fifth side wall 105 towards the inside of the A-pillar main beam 1 is 135° to 145°, preferably 138°; between the seventh side wall 107 and the sixth side wall 106 The included angle toward the inner side of the A-pillar main beam 1 is 115° to 125°, preferably 117°; the included angle toward the inner side of the A-pillar main beam 1 between the eighth side wall 108 and the seventh side wall 107 is 70° to 80°, preferably 76.5°; the included angle between the first side wall 101 and the eighth side wall 108 toward the inner side of the A-pillar main beam 1 is 90° to 100°, preferably 96°.

In an alternative embodiment, the thickness of the side walls of the A-pillar main beam 1 is 4 mm to 5 mm, preferably 4.38 mm.

In an optional embodiment, the included angle between the first side cover part 202 and the first skirt edge 204 is 95° to 105°, preferably 98.84°; the angle between the top cover part 201 and the first side cover part 202 The included angle is 75° to 85°; the included angle between the second side cover part 203 and the second skirt 205 is 95° to 105°; the included angle between the top cover part 201 and the second side cover part 203 is 85° to 95°.

As shown in FIG. 4 , in the main beam 1 of the A-pillar, the shortest distance from the outer surface of the fourth side wall 104 to the transition between the seventh side wall 107 and the eighth side wall 108 is 55 mm to 65 mm, preferably 61.5 mm ; The shortest distance from the outer surface of the second side wall 102 to the transition of the fifth side wall 105 and the sixth side wall 106 is 55 mm to 65 mm, preferably 62 mm.

The A-pillar of the embodiment of the present invention is composed of aluminum alloy profiles and carbon fiber materials to form a closed cavity structure as shown in FIG. Torsion resistance, and with the glue riveting process between the two, the closed structure as shown in Figure 1 formed by the glue riveting of profiles and carbon fiber parts enhances the rigidity of the A-pillar part of the car, thereby improving the collision of the whole vehicle. Safety performance, due to the smaller cross-sectional area of the A-pillar main beam 1, thereby reducing the blind spot of the car's vision, due to the irregular structure of the A-pillar main beam 1 and the gap between the A-pillar main beam 1 and the A-pillar outer panel 2 The unique glue riveting connection structure and cavity structure help enhance the stability of the body frame and ensure the driving safety and driving experience of the vehicle.

The A-pillar of the embodiment of the present invention is based on the vehicle collision safety performance and the customer's driving vision criteria, under the premise of satisfying the vehicle modeling requirements, based on the minimum profile size and section criteria, that is, under the rigidity principle, based on the overall The appearance of the car is smooth and beautiful, and the design is optimized through topology optimization to design the distribution of reinforcement ribs inside the cavity and the selection of wall thickness. The structure of the A-pillar of the embodiment of the present invention has higher inertia modulus and bending modulus.

In the embodiment of the present utility model, the section inertia modulus is optimized based on the minimum size, the overall closed section Iy=44.41cm ⁴ , Wy=Iy/6.2=7.16cm ³ , Iz=57.57cm ⁴ , Wy=Iy/8.47=6.8cm ^3. Section Iy=26.65cm ⁴ , Wy=Iy/6.15=4.33cm ³ , Iz=35.36cm ⁴ , Wy=Iy/6.38=5.54cm ³ of aluminum profile A column main beam 1 , compared to the more traditional A The column structure has been improved by more than 30%, and the load-bearing performance has been improved by 30% based on the same material. The tangential bearing strength of the rivet at the glue rivet is 222MPa, and the normal bearing strength is 235MPa, which is more than 50% higher than that of pure glue. In addition, when the A-pillar of the embodiment of the present invention is applied to a super sports car, the curved surface shape of the A-pillar outer panel 2 of carbon fiber material is optimized based on the wind drying resistance of the super sports car and the principles of beautiful appearance. The combination of different profiles can obtain different cross-sectional shapes, so as to obtain the optimal load-bearing performance and the lowest wind resistance coefficient. The flange 109 of the A-pillar main beam 1 mainly provides a mounting surface for bonding with the A-pillar outer panel 2. At the same time, a glue riveting connection structure can also be used between the flange 109 and the A-pillar outer panel 2. The carbon fiber A-pillar outer panel 2 The shape is determined by the modeling continuity of the A-pillar outer panel 2 and the bearing state of the closed section. By means of glue riveting, the carbon fiber A-pillar outer panel 2 with a conformal lap design is connected to form a closed cavity structure. In the glue riveting connection structure, a blind rivet is added at both ends of the connection structure, and the tangential strength of the rivet ensures the bearing strength of the overall structure in the axial direction of the external load. The internal structure of the cavity can be optimized to meet different requirements. For example, for the low posture of the super sports vehicle, the vertical bending resistance of the profile can be strengthened on the premise of satisfying the axial performance of the profile. Under the premise that the structural parts are subjected to external loads, the inertia moment of the closed section and the section modulus of the closed section are in response to the external load, the appearance size of the closed cavity is given priority to ensure a good driving experience.

The embodiment of the present invention also provides an automobile, which adopts the A-pillar described in any one of the above embodiments.

It should be understood that although this specification is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

A series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalents made without departing from the technical spirit of the present invention Embodiments or modifications, such as combination, division or repetition of features, should all be included within the protection scope of the present invention.

Claims (9)

1. an A-pillar, described A-pillar is made up of the A-pillar main beam (1) of integrally formed hollow aluminum profile tubular structure and the A-pillar outer plate (2) of carbon fiber material, it is characterized in that: A flange (109) is formed by extending one side wall of the A-pillar main beam (1) to the outside of the A-pillar main beam (1), and the flange (109) is along the length of the A-pillar main beam (1). extending in the axial direction; The A-pillar outer panel (2) extends along the axial direction of the A-pillar main beam (1), and the A-pillar outer panel (2) has a first skirt (204) and a second skirt ( 205), wherein the first skirt (204) is glue-riveted to the surface of the A-pillar main beam (1), and the second skirt (205) is glue-riveted to the flange (109) , a cavity (3) is formed around the surface of the A-pillar outer plate (2) and the A-pillar main beam (1). 2. A-pillar according to claim 1, is characterized in that: The A-pillar outer panel (2) further has a top cover part (201), a first side cover part (202) and a second side cover part (203); wherein, The top cover part (201) is not in contact with the surface of the A-pillar main beam (1); The first side cover part (202) is formed by extending from one side of the top cover part (201) to the side wall surface of the A-pillar main beam (1), and the first side cover part (202) is away from The end of the top cover part (201) extends along the side wall surface of the A-pillar main beam (1) to form the first skirt (204); The second side cover portion (203) is formed by extending the other side of the top cover portion (201) opposite to the first side cover portion (202) toward the flange (109), and the second side cover portion (203) is formed by the first side cover portion (202). The ends of the two side cover parts (203) away from the top cover part (201) extend along the surface of the flange (109) to form the second skirt (205); The cavity ( 3). 3. A-pillar according to claim 2, is characterized in that, described A-pillar main beam (1) has: a first side wall (101), the first side wall (101) is connected with the first skirt (204) by glue riveting; A second side wall (102), the second side wall (102) is away from the first skirt ( 204) direction, and the angle between the second side wall (102) and the first side wall (101) toward the inner side of the A-pillar main beam (1) is an obtuse angle; A third side wall (103), the third side wall (103) is formed by extending the side of the second side wall (102) away from the first side wall (101), and the third side The included angle between the wall (103) and the second side wall (102) toward the inner side of the A-pillar main beam (1) is an obtuse angle; a fourth side wall (104), the fourth side wall (104) is formed by extending the side of the third side wall (103) away from the second side wall (102), and the fourth side The included angle between the wall (104) and the third side wall (103) toward the inner side of the A-pillar main beam (1) is an obtuse angle; A fifth side wall (105), the fifth side wall (105) is formed by extending the side of the fourth side wall (104) away from the third side wall (103), and the fifth side The included angle between the wall (105) and the fourth side wall (104) toward the inner side of the A-pillar main beam (1) is an obtuse angle; A sixth side wall (106), the sixth side wall (106) is formed by extending the side of the fifth side wall (105) away from the fourth side wall (104), and the sixth side The included angle between the wall (106) and the fifth side wall (105) toward the inner side of the A-pillar main beam (1) is an obtuse angle; A seventh side wall (107), the seventh side wall (107) is formed by extending the side of the sixth side wall (106) away from the fifth side wall (105), and the seventh side The included angle between the wall (107) and the sixth side wall (106) toward the inner side of the A-pillar main beam (1) is an obtuse angle; An eighth side wall (108), the eighth side wall (108) is formed by extending the side of the seventh side wall (107) away from the sixth side wall (106), and the eighth side wall (108) The side of the wall (108) away from the seventh side wall (107) extends to form the first side wall (101), and the space between the eighth side wall (108) and the seventh side wall (107) is The included angle toward the inner side of the A-pillar main beam (1) is an acute angle, and the included angle between the first side wall (101) and the eighth side wall (108) toward the inner side of the A-pillar main beam (1) is Excellent angle. 4. A-pillar according to claim 3, is characterized in that: The flange (109) is formed by extending from the surface of the fifth side wall (105) to the outside of the A-pillar main beam (1); The surface of the sixth side wall (106) faces the cavity (3). 5. A-pillar according to claim 3, is characterized in that, described A-pillar main beam (1) also has: A reinforcing rib (110), the reinforcing rib (110) is formed by the inner surface of the fourth side wall (104) and the inner surface of the first side wall (101) extending oppositely, and the reinforcing rib (110) 110) Extending along the axial direction of the A-pillar main beam (1), so that the tubular structure of the A-pillar main beam (1) is divided into two tube chambers by the reinforcing ribs (110). 6. A-pillar according to claim 3, is characterized in that: The included angle between the second side wall (102) and the first side wall (101) toward the inner side of the A-pillar main beam (1) is 105° to 115°; The included angle between the third side wall (103) and the second side wall (102) toward the inner side of the A-pillar main beam (1) is 135° to 145°; The included angle between the fourth side wall (104) and the third side wall (103) toward the inner side of the A-pillar main beam (1) is 110° to 120°; The included angle between the fifth side wall (105) and the fourth side wall (104) toward the inner side of the A-pillar main beam (1) is 115° to 125°; The included angle between the sixth side wall (106) and the fifth side wall (105) toward the inner side of the A-pillar main beam (1) is 135° to 145°; The included angle between the seventh side wall (107) and the sixth side wall (106) toward the inner side of the A-pillar main beam (1) is 115° to 125°; The included angle between the eighth side wall (108) and the seventh side wall (107) toward the inner side of the A-pillar main beam (1) is 70° to 80°; The included angle between the first side wall (101) and the eighth side wall (108) toward the inner side of the A-pillar main beam (1) is 90° to 100°; The thickness of the side walls of the A-pillar main beam (1) is 4 mm to 5 mm. 7. A-pillar according to claim 2, is characterized in that: The included angle between the first side cover portion (202) and the first skirt edge (204) is 95° to 105°; The included angle between the top cover part (201) and the first side cover part (202) is 75° to 85°; The included angle between the second side cover portion (203) and the second skirt (205) is 95° to 105°; The included angle between the top cover part (201) and the second side cover part (203) is 85° to 95°. 8. A-pillar according to claim 3, is characterized in that: The shortest distance from the outer surface of the fourth side wall (104) to the transition of the seventh side wall (107) and the eighth side wall (108) is 55 mm to 65 mm; The shortest distance from the outer surface of the second side wall (102) to the transition of the fifth side wall (105) and the sixth side wall (106) is 55 mm to 65 mm. 9. An automobile, characterized in that the A-pillar according to any one of claims 1 to 8 is used.

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