Automobile threshold and reinforcing beam thereof

Abstract

The utility model discloses an automobile doorsill and a stiffening beam thereof. The automobile doorsill comprises a first beam and a second beam, the cross section of the first beam and the cross section of the second beam are both shaped like a Chinese character'ri 'in the x direction, and the size of the cross section of the first beam in the x direction is smaller than that of the cross section of the second beam in the x direction; the first beam and the second beam extend in the y direction, and the extension size of the first beam and the extension size of the second beam are matched with the extension size of an automobile threshold. The first beam is stacked and fixedly connected to the top face of the second beam. The reinforcing beam is formed by welding the first beam and the second beam which are formed by rolling the steel material, and the cross section of the reinforcing beam is designed to be in the shape formed by overlapping the two Chinese character'ri 'with the small upper part and the large lower part, so that the collision safety performance of the side column is improved under the condition that the weight is not greatly increased, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and specifically, to an automobile sill and its reinforcing beam. Background Art

[0002] For pure electric vehicles, the battery is relatively large and is generally arranged under the floor of the passenger compartment. In the side pole impact condition, the sill and the battery case frame will deform inward towards the vehicle interior, intruding into the interior of the battery case, which may cause the battery cells inside to deform. The greater the deformation amount, the greater the risk of battery fire and explosion, resulting in casualties.

[0003] In order to reduce the inward intrusion amount of the sill and the battery case frame, some vehicle models will add a reinforcing beam between the inner and outer sills to resist deformation. In the prior art, the reinforcing beam is generally made of aluminum material by extrusion process. The reinforcing beam is bolted in the installation cavity formed by the outer sill panel and the inner sill panel through a connecting bracket, which not only improves the side pole impact safety performance to meet the requirements, but also does not increase the overall weight of the electric vehicle too much. However, it will cause a relatively large increase in cost, with the single-vehicle material cost increasing by hundreds or even thousands of yuan. In the prior art, there is a way to reduce costs by reducing the cross-sectional size of the reinforcing beam, but this way will result in insufficient energy absorption. It may meet the national standard side pole impact requirements, but it may not meet the side pole impact requirements of some enterprise standards. Summary of the Utility Model

[0004] To solve at least one aspect of the above problems, the utility model provides a reinforcing beam for an automobile sill, including a first beam and a second beam; the cross-sectional shape of the first beam and the cross-sectional shape of the second beam are both "day" shaped in the x direction, and the dimension of the first beam in the x direction of the cross-section is smaller than the dimension of the second beam in the x direction of the cross-section; both the first beam and the second beam extend along the y direction, and the extension dimension of the first beam and the extension dimension of the second beam both match the extension dimension of the automobile sill; the first beam is stacked and fixedly connected to the top surface of the second beam.

[0005] Through the above technical solution, the cross-sectional shape of the reinforcing beam is designed as two "day" shapes stacked up and down, which improves the side pole impact safety performance. And in order to adapt to the shape of the installation cavity surrounded by the inner sill panel and the outer sill panel, the reinforcing beam is designed to be smaller at the top and larger at the bottom, so that the reinforcing beam can fill the installation cavity as much as possible, which helps to further improve the side pole impact safety performance. Therefore, the reinforcing beam of the present application has high side pole impact safety performance.

[0006] Preferably, both the first beam and the second beam are roll-formed from steel materials. Through the above technical solution, the reinforcing beam of the present application is made by welding the first beam and the second beam roll-formed from steel materials. Since steel materials are cheaper than aluminum materials, the reinforcing beam of the present application can significantly reduce costs while ensuring the side pole impact safety performance requirements and adding not much weight.

[0007] Preferably, the first beam and the second beam are made of steel plates of model MS1500.

[0008] Preferably, the thickness of the steel material used for the first beam and the second beam is 2-3 mm. Through the above technical solution, by selecting high-strength steel plates as the production materials for the reinforcement beams of the present application, the thickness of the production materials can be reduced to 2-3 mm, realizing the control of the weight of the reinforcement beams while ensuring the side column collision safety performance.

[0009] Preferably, the first beam includes a first neutral wall, a first left top wall, a first left side wall, a first bottom side wall, a first right side wall, and a first right top wall connected in sequence. The first left top wall and the first right top wall are in the same plane; a first welding edge extending along the first bottom side wall extends from the free end of the first neutral wall, and the first welding edge is fixedly welded to the middle part of the first bottom side wall close to it. The first welding edge divides the first bottom side wall into a left part and a right part; a second welding edge extending along the first neutral wall extends from the free end of the first right top wall, and the second welding edge is fixedly welded to the top end of the first neutral wall; the first neutral wall, the first left top wall, the first left side wall, and the left part of the first bottom side wall enclose a left cavity of the first beam, and the first neutral wall, the first right top wall, the first right side wall, and the right part of the first bottom side wall enclose a right cavity of the first beam.

[0010] Preferably, both the first left side wall and the first right side wall are inclined planes that slope towards each other from bottom to top, which helps to improve the side column collision safety performance and makes room for ensuring the size of the gap between the side wall of the reinforcement beam of the present application and the inner or outer threshold panel.

[0011] Preferably, the second beam includes a second neutral wall, a second left top wall, a second left side wall, a second bottom side wall, a second right side wall, and a second right top wall connected in sequence; a third welding edge extending along the second bottom side wall extends from the free end of the second neutral wall, and the third welding edge is fixedly welded to the middle part of the second bottom side wall close to it. The third welding edge divides the second bottom side wall into a left part and a right part; a fourth welding edge extending along the second neutral wall extends from the free end of the second right top wall, and the fourth welding edge is fixedly welded to the top end of the second neutral wall; the second neutral wall, the second left top wall, the second left side wall, and the left part of the second bottom side wall enclose a left cavity of the second beam, and the second neutral wall, the second right top wall, the second right side wall, and the right part of the second bottom side wall enclose a right cavity of the second beam; both sides of the first bottom side wall along its extending direction are respectively welded and fixed to the second left top wall and the second right top wall.

[0012] Preferably, the first welding edge and the first bottom side wall, and the third welding edge and the second bottom side wall are welded and fixed by roll spot welding; the second welding edge and the first neutral wall, the fourth welding edge and the second neutral wall, the first bottom side wall and the second left top wall, and the first bottom side wall and the second right top wall are welded and fixed by MAG welding (abbreviation for Metal Active Gas Arc Welding, metal inert gas arc welding).

[0013] Preferably, the first neutral wall and the second neutral wall are arranged staggeredly, which helps to improve the side impact safety performance.

[0014] The present application also provides an automotive sill, including an inner sill panel, an outer sill panel, a plurality of connecting brackets, and a reinforcing beam of the automotive sill according to any one of the above; the extending directions of the inner sill panel, the outer sill panel, and the reinforcing beam are the same, the extending dimensions of the inner sill panel, the outer sill panel, and the reinforcing beam match, the top ends of the inner sill panel and the outer sill panel are welded, the bottom ends of the inner sill panel and the outer sill panel are welded, and the inner sill panel and the outer sill panel enclose an installation cavity extending along the extending direction of the inner sill panel; the reinforcing beam is arranged in the installation cavity, and a plurality of connecting brackets are respectively arranged between the reinforcing beam and the inner sill panel or the outer sill panel, one end of the connecting bracket is connected to the reinforcing beam, and the other end is connected to the inner sill panel or the outer sill panel.

[0015] Preferably, the connecting bracket is welded and fixed to the reinforcing beam. Through the above technical solution, the bolt connection in the prior art is improved to welding, which helps to reduce the weight.

[0016] Preferably, the distance between the side wall of the reinforcing beam and the inner sill panel or the outer sill panel is 5-15 mm, and the distance between the bottom wall and the top wall of the reinforcing beam and the inner sill panel or the outer sill panel is 20-30 mm. Through the above technical solution, it not only ensures the size of the gap between the reinforcing beam of the present application and the inner sill panel or the outer sill panel, ensures the smooth passage of the electrocoating liquid in the subsequent electrocoating process, but also ensures that the size of the reinforcing beam of the present application is large enough, thus ensuring the side impact safety performance.

[0017] The automotive sill and its reinforcing beam of the present utility model have the following beneficial effects:

[0018] By designing the cross-section of the reinforcing beam into the shape of two superimposed "day" characters with a larger upper part and a smaller lower part, and designing the distance between the side wall of the reinforcing beam and the inner or outer sill panel to be 5 - 15 mm, and the distance between the bottom and top walls of the reinforcing beam and the inner or outer sill panel to be 20 - 30 mm, the reinforcing beam of the present application can be filled as much as possible in the installation cavity surrounded by the inner and outer sill panels, which not only meets the requirements of subsequent electrophoresis processes but also helps improve the side pole impact safety performance; the first beam and the second beam are made by roll forming from high-strength thin steel plates and then welded to form the reinforcing beam of the present application. Since steel materials are cheaper than aluminum materials, and when the reinforcing beam of the present application is installed in the installation cavity, the reinforcing beam is welded to the connecting bracket, reducing the use of connecting parts, which not only reduces the weight but also lowers the cost. The reinforcing beam of the present application can significantly reduce the cost while ensuring the side pole impact safety performance requirements and adding little weight. Therefore, the reinforcing beam of the present application has high side pole impact safety performance and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to better understand the above and other objects, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the drawings. The same reference numerals in the drawings refer to the same components. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no restrictive effect on the scope of the present invention. The components in the drawings are not drawn to scale.

[0020] Figure 1 FIG. shows a schematic structural diagram of a reinforcing beam of an automobile sill according to an embodiment of the present invention;

[0021] Figure 2 FIG. shows a partial structural diagram of a reinforcing beam of an automobile sill according to an embodiment of the present invention;

[0022] Figure 3 FIG. shows a cross-sectional view of an automobile sill according to an embodiment of the present invention.

[0023] DESCRIPTION OF THE REFERENCE NUMERALS:

[0024] 1, first beam; 11, first neutral wall; 111, first welding edge; 12, first left top wall; 13, first left side wall; 14, first bottom side wall; 15, first right side wall; 16, first right top wall; 161, second welding edge; 2, second beam; 21, second neutral wall; 211, third welding edge; 22, second left top wall; 23, second left side wall; 24, second bottom side wall; 25, second right side wall; 26, second right top wall; 261, fourth welding edge; 3, inner sill panel; 4, outer sill panel; 5, connecting bracket; 51, welding hole; 52, connecting hole; 53, positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The exemplary embodiments of the present disclosure will be described below in conjunction with the accompanying drawings. Various details of the embodiments of the present disclosure are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0026] As used herein, the term "comprising" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise specified, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "an exemplary embodiment" and "an embodiment" mean "at least one exemplary embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included hereinafter.

[0027] To at least partially solve one or more of the above problems and other potential problems, an embodiment of the present disclosure provides a reinforcing beam for an automotive sill, including a first beam 1 and a second beam 2; the cross-sectional shapes of both the first beam 1 and the second beam 2 are in the shape of a "day" character in the x direction, and the dimension of the first beam 1 in the x direction of the cross-section is smaller than that of the second beam 2 in the x direction of the cross-section; both the first beam 1 and the second beam 2 extend along the y direction, and the extension dimensions of both the first beam 1 and the second beam 2 match the extension dimension of the automotive sill; the first beam 1 is stacked and fixedly connected to the top surface of the second beam 2.

[0028] Specifically, as Figures 1 to 3 shown, the x direction is the left-right direction of the vehicle, the y direction is the front-rear direction of the vehicle, and the z direction is the height direction of the vehicle; the reinforcing beam of the present application includes a first beam 1 and a second beam 2; the first beam 1 is preferably roll-formed from a steel material, and the steel material used for the first beam 1 is preferably an MS1500 type steel plate with a thickness of 2 - 3 mm; the first beam extends along the y direction, and the extension dimension of the first beam 1 matches the extension dimension of the automotive sill, where the extension dimension of the automotive sill is the dimension of the automotive sill along the front-rear direction of the vehicle; the cross-sectional shape of the first beam 1 is in the shape of a "day" character in the x direction. Specifically, as Figure 3As shown, the first beam 1 includes a first neutral wall 11, a first left top wall 12, a first left side wall 13, a first bottom side wall 14, a first right side wall 15, and a first right top wall 16 connected in sequence. The first left top wall 12 and the first right top wall 16 are in the same plane. Preferably, both the first left side wall 13 and the first right side wall 15 are inclined planes in a direction perpendicular to their extending directions. A first welding edge 111 extending along the first bottom side wall 14 extends from the free end of the first neutral wall 11. The first welding edge 111 is fixedly welded to the middle part of the first bottom side wall 14 close to it. Preferably, the first welding edge 111 and the first bottom side wall 14 are fixedly welded by means of roll spot welding. The first welding edge 111 divides the first bottom side wall 14 into a left part and a right part. A second welding edge 161 extending along the first neutral wall 11 extends from the free end of the first right top wall 16. The second welding edge 161 is fixedly welded to the top end of the first neutral wall 11. Preferably, the second welding edge 161 and the first neutral wall 11 are fixedly welded by means of MAG welding. The left cavity of the first beam 1 is formed by enclosing the first neutral wall 11, the first left top wall 12, the first left side wall 13, and the left part of the first bottom side wall 14. The right cavity of the first beam 1 is formed by enclosing the first neutral wall 11, the first right top wall 16, the first right side wall 15, and the right part of the first bottom side wall 14. In a preferred embodiment, both the first left side wall 13 and the first right side wall 15 are inclined planes that are inclined upward and toward each other.

[0029] The second beam 2 is roll-formed from a steel material. The steel material used for the second beam 2 is preferably an MS1500 type steel plate with a thickness of 2 - 3 mm. The second beam 2 extends along the y direction, and the extension dimension of the second beam 2 matches the extension dimension of the vehicle sill. The cross-sectional shape of the second beam 2 is in the shape of a Chinese character 'Ri' in the x direction, and the dimension of the second beam 2 in the x direction of the cross-section is larger than the dimension of the first beam 1 in the x direction of the cross-section. Specifically, the second beam 2 includes a second neutral wall 21, a second left top wall 22, a second left side wall 23, a second bottom side wall 24, a second right side wall 25, and a second right top wall 26 connected in sequence. Preferably, the second neutral wall 21 is staggered with the first neutral wall 11. A third welding edge 211 extending along the second bottom side wall 24 extends from the free end of the second neutral wall 21. The third welding edge 211 is fixedly welded to the middle part of the second bottom side wall 24. Preferably, the third welding edge 211 and the second bottom side wall 24 are welded and fixed by roll spot welding. The third welding edge 211 divides the second bottom side wall 24 into a left part and a right part. A fourth welding edge 261 extending along the second neutral wall 21 extends from the free end of the second right top wall 26. The fourth welding edge 261 is fixedly welded to the top end of the second neutral wall 21. Preferably, the fourth welding edge 261 and the second neutral wall 21 are welded and fixed by MAG welding. The left cavity of the second beam 2 is formed by enclosing the second neutral wall 21, the second left top wall 22, the second left side wall 23, and the left part of the second bottom side wall 24. The right cavity of the second beam 2 is formed by enclosing the second neutral wall 21, the second right top wall 26, the second right side wall 25, and the right part of the second bottom side wall 24. Preferably, in order to ensure the clearance dimension between the side wall of the reinforcing beam of the present application and the inner sill plate 3 or the outer sill plate 4, avoidance is required. As Figure 3 shown, the second right side wall 25 includes a vertical part and a first inclined part connected in sequence from bottom to top. The vertical part is a vertically arranged plane, and the first inclined part is an inclined plane that gradually approaches the second neutral wall 21 from bottom to top.

[0030] The first beam 1 is stacked and fixedly connected to the top surface of the second beam 2, that is, both sides of the bottom surface of the first beam 1 along its extension direction are respectively welded and fixed to both sides of the top surface of the second beam 2 along its extension direction. Specifically, both sides of the first bottom side wall 14 along its extension direction are respectively welded and fixed to the second left top wall 22 and the second right top wall 26. Preferably, both the first bottom side wall 14 and the second left top wall 22 and the first bottom side wall 14 and the second right top wall 26 are welded and fixed by MAG welding.

[0031] In a preferred embodiment, as Figure 3As shown, the corners of the first beam 1 and the second beam 2 are all arc transition structures, that is, the connection between the first neutral wall 11 and the first welding edge 111, the connection between the first neutral wall 11 and the first left top wall 12, the connection between the first left top wall 12 and the first left side wall 13, the connection between the first left side wall 13 and the first bottom side wall 14, the connection between the first bottom side wall 14 and the first right side wall 15, the connection between the first right side wall 15 and the first right top wall 16, the connection between the first right top wall 16 and the second welding edge 161, the connection between the second neutral wall 21 and the third welding edge 211, the connection between the second neutral wall 21 and the second left top wall 22, the connection between the second left top wall 22 and the second left side wall 23, the connection between the second left side wall 23 and the second bottom side wall 24, the connection between the second bottom side wall 24 and the second right side wall 25, the connection between the second right side wall 25 and the second right top wall 26, and the connection between the second right top wall 26 and the fourth welding edge 261 are all arc transition structures.

[0032] In a preferred embodiment, as Figure 3 shown, the first bottom side wall 14 includes a second inclined portion and a first horizontal portion connected in sequence along the x direction, the second right top wall 26 includes a second horizontal portion and a third inclined portion connected in sequence along the x direction, the first horizontal portion and the second horizontal portion are both horizontally arranged planes, the second inclined portion is an inclined plane that gradually slopes downward along the direction close to the first neutral wall 11, the third inclined portion is an inclined plane that gradually slopes downward along the direction close to the second neutral wall 21, the inclination angles and dimensions of the second inclined portion and the third inclined portion are the same, the second inclined portion is connected to the third inclined portion, and the first horizontal portion is connected to the second right top wall 26.

[0033] The present application also provides an automotive sill, including an inner sill panel 3, an outer sill panel 4, a plurality of connecting brackets 5, and a reinforcing beam of an automotive sill as described in any one of the above; the extending directions of the inner sill panel 3, the outer sill panel 4, and the reinforcing beam are the same, the extending dimensions of the inner sill panel 3, the outer sill panel 4, and the reinforcing beam match, the top ends of the inner sill panel 3 and the outer sill panel 4 are welded, the bottom ends of the inner sill panel 3 and the outer sill panel 4 are welded, and the inner sill panel 3 and the outer sill panel 4 enclose an installation cavity extending along the extending direction of the inner sill panel 3; the reinforcing beam is arranged in the installation cavity. Preferably, the distance between the side wall of the reinforcing beam and the inner sill panel 3 or the outer sill panel 4 is 5 - 15 mm, and the distances between the bottom wall and the top wall of the reinforcing beam and the inner sill panel 3 or the outer sill panel 4 are 20 - 30 mm; a plurality of connecting brackets 5 are respectively arranged between the reinforcing beam and the inner sill panel 3 or the outer sill panel 4. One end of the connecting bracket 5 is connected to the reinforcing beam. Preferably, the connecting bracket 5 and the reinforcing beam are welded and fixed by the welding method of MAG welding. The other end of the connecting bracket 5 is connected to the inner sill panel 3 or the outer sill panel 4 by bolts or by welding; specifically, as Figure 1 and Figure 2As shown, a plurality of connecting brackets 5 are respectively arranged on the top surface and / or the bottom surface at both ends of the reinforcing beam. The connecting bracket 5 includes a first part and a second part which are connected to each other. A welding hole 51 is formed in the first part, and a connecting hole 52 is formed in the second part. The first part is fixedly welded to the reinforcing beam through the welding hole 51, and the second part is connected to the inner threshold plate 3 or the outer threshold plate 4 by bolts through the connecting hole 52. Preferably, a positioning hole 53 is formed in the second part for positioning the connecting bracket 5.

[0034] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to technologies in the market, or to enable other ordinary skill in the art to understand the present disclosure.

Claims

1. A reinforcing beam for an automobile sill, characterized in that: The invention comprises a first beam (1) and a second beam (2); the cross-sectional shape of the first beam (1) and the cross-sectional shape of the second beam (2) are both in the shape of a "日" in the x direction, and the dimension of the cross-sectional shape of the first beam (1) in the x direction is smaller than the dimension of the cross-sectional shape of the second beam (2) in the x direction; the first beam (1) and the second beam (2) both extend along the y direction, and the extension dimension of the first beam (1) and the extension dimension of the second beam (2) both match the extension dimension of the door sill of an automobile; the first beam (1) is stacked and fixedly connected to the top surface of the second beam (2).

2. The reinforcing beam of an automobile sill according to claim 1, characterized in that: The first beam (1) and the second beam (2) are both formed by roll forming of steel material.

3. The reinforcing beam of an automobile sill according to claim 2, characterized in that: The thickness of the steel material used for the first beam (1) and the second beam (2) is 2 to 3 mm.

4. The reinforcing beam of an automobile sill according to claim 2, wherein: The first beam (1) comprises a first central wall (11), a first left top wall (12), a first left side wall (13), a first bottom side wall (14), a first right side wall (15) and a first right top wall (16) which are connected in sequence, wherein the first left top wall (12) and the first right top wall (16) are located in the same plane; a first welding edge (111) extending along the first bottom side wall (14) extends from the free end of the first central wall (11); the first welding edge (111) is welded and fixed to the first bottom side wall (14) near the middle; the first welding edge (111) divides the first bottom side wall (14) into The first beam (1) is divided into a left side portion and a right side portion; a second welding edge (161) extending along the first central wall (11) is extended from the free end of the first right top wall (16); the second welding edge (161) is welded and fixed to the top end of the first central wall (11); the left side portion of the first central wall (11), the first left top wall (12), the first left side wall (13) and the first bottom side wall (14) are enclosed to form a left cavity of the first beam (1); the right side portion of the first central wall (11), the first right top wall (16), the first right side wall (15) and the first bottom side wall (14) are enclosed to form a right cavity of the first beam (1).

5. The reinforcing beam of an automobile sill according to claim 4, characterized in that: The first left side wall (13) and the first right side wall (15) are both inclined surfaces that are inclined from bottom to top in a direction approaching each other.

6. The reinforcing beam of an automobile sill according to claim 4, characterized in that: The second beam (2) includes a second neutral wall (21), a second left top wall (22), a second left side wall (23), a second bottom side wall (24), a second right side wall (25), and a second right top wall (26) connected in sequence; a third welding edge (211) extending along the second bottom side wall (24) extends from the free end of the second neutral wall (21), and the third welding edge (211) is fixedly welded to the vicinity of the middle of the second bottom side wall (24), and the third welding edge (211) divides the second bottom side wall (24) into a left part and a right part; a fourth welding edge (261) extending along the second neutral wall (21) extends from the free end of the second right top wall (26), and the fourth welding edge (261) is fixedly welded to the top end of the second neutral wall (21); the left cavity of the second beam (2) is formed by enclosing the second neutral wall (21), the second left top wall (22), the second left side wall (23), and the left part of the second bottom side wall (24), and the right cavity of the second beam (2) is formed by enclosing the second neutral wall (21), the second right top wall (26), the second right side wall (25), and the right part of the second bottom side wall (24); both sides of the first bottom side wall (14) along its extending direction are fixedly welded to the second left top wall (22) and the second right top wall (26) respectively.

7. The reinforcing beam of an automotive sill according to claim 6, wherein: The first welding edge (111) is fixedly welded to the first bottom side wall (14), and the third welding edge (211) is fixedly welded to the second bottom side wall (24) by means of roller spot welding; the second welding edge (161) is fixedly welded to the first neutral wall (11), the fourth welding edge (261) is fixedly welded to the second neutral wall (21), the first bottom side wall (14) is fixedly welded to the second left top wall (22), and the first bottom side wall (14) is fixedly welded to the second right top wall (26) by means of MAG welding.

8. An automobile sill, characterized in that: It includes an inner sill panel (3), an outer sill panel (4), several connecting brackets (5), and a reinforcing beam of an automotive sill according to any one of claims 1 to 7; the extending directions of the inner sill panel (3), the outer sill panel (4), and the reinforcing beam are the same, the extending dimensions of the inner sill panel (3), the outer sill panel (4), and the reinforcing beam match, the top ends of the inner sill panel (3) and the outer sill panel (4) are welded, the bottom ends of the inner sill panel (3) and the outer sill panel (4) are welded, and the inner sill panel (3) and the outer sill panel (4) enclose an installation cavity extending along the extending direction of the inner sill panel (3); the reinforcing beam is arranged in the installation cavity, and several connecting brackets (5) are respectively arranged between the reinforcing beam and the inner sill panel (3) or the outer sill panel (4), one end of the connecting bracket (5) is connected to the reinforcing beam, and the other end is connected to the inner sill panel (3) or the outer sill panel (4).

9. The vehicle sill according to claim 8, characterized in that: The connecting bracket (5) is fixedly welded to the reinforcing beam.

10. A vehicle sill according to claim 8, characterized in that: The distance between the side wall of the reinforcing beam and the inner sill panel (3) or the outer sill panel (4) is 5 - 15 mm, and the distance between the bottom wall and the top wall of the reinforcing beam and the inner sill panel (3) or the outer sill panel (4) is 20 - 30 mm.

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