CN217835795U - Assembly connection structure of automobile floor beam - Google Patents
Assembly connection structure of automobile floor beam Download PDFInfo
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- CN217835795U CN217835795U CN202220989803.4U CN202220989803U CN217835795U CN 217835795 U CN217835795 U CN 217835795U CN 202220989803 U CN202220989803 U CN 202220989803U CN 217835795 U CN217835795 U CN 217835795U
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Abstract
An assembly connecting structure of an automobile floor beam is provided with a first connecting piece and a second connecting piece; the first connecting piece is of a hollow cavity structure and is provided with an arc-shaped top surface extending towards the front side and the rear side, the first connecting piece is connected with the first cross beam through the front side extending part of the arc-shaped top surface, the front side wall of the cavity and the bottom surface of the cavity in a spot welding manner, and the first connecting piece is connected with the end part of the longitudinal beam through the rear side extending part of the arc-shaped top surface and the rear side wall of the cavity in a spot welding manner; the second connecting piece is a T-shaped hollow shell, the upper end and the lower end of the second connecting piece are of an open structure, the side wall of the second connecting piece is provided with a longitudinal beam passing groove and a transverse beam passing groove, the longitudinal beam passes through the longitudinal beam passing groove, the left side wall and the right side wall of the longitudinal beam are connected with the longitudinal inner wall of the T-shaped hollow shell through spot welding, the end part of the second transverse beam passes through the transverse beam passing groove, and the front side wall and the rear side wall of the second transverse beam are connected with the transverse inner wall of the T-shaped hollow shell through spot welding. The invention realizes the reliable connection of parts in the aluminum alloy floor beam assembly and achieves the aims of meeting the requirements of automobile floor beam connection strength, light weight and low cost.
Description
Technical Field
The invention relates to an automobile floor beam, in particular to an assembling and connecting structure of the automobile floor beam.
Background
At present, in an automobile floor beam assembly, a cross beam and a longitudinal beam are generally formed by stamping steel plates, and the connection between the cross beam and the longitudinal beam is realized through a spot welding process. With the continuous deepening of the automobile lightweight design concept, in order to better reduce the weight of the automobile body, an aluminum alloy material automobile body floor beam structure is selected during the whole automobile design.
As shown in fig. 1, 2, and 3, after the automobile floor beam component is made of an aluminum alloy material, if a connection manner similar to that of a steel stamping part is still adopted (i.e., the first cross beam 1, the second cross beam 3 and the longitudinal beam 2 are connected through a spot welding process), in order to ensure the connection strength, 3-5 spot welding connection faces are generally arranged, so that the end portions of the second cross beam 3 and the longitudinal beam 2 need to be flanged and bent to form a joint face jointed with the longitudinal beam 2 or the first cross beam 1, and as microcracks or cracks are likely to occur in the bent portion during the bending deformation process of the aluminum alloy material, a process gap 4 needs to be designed between the flanged joint face and the joint face of the end portions of the second cross beam 3 and the longitudinal beam 2, thereby greatly weakening the strength of the end portions of the second cross beam 3 and the longitudinal beam 2.
As shown in fig. 4, in order to solve the above problem and improve the strength of the end portions of the aluminum alloy second cross member 3 and the longitudinal member 2, it is assumed that a first cast aluminum connector 5 and a second cast aluminum connector 6 are additionally provided at the connecting portions between the longitudinal member 2 and the first cross member 1 and between the second cross member 3 and the longitudinal member 2, and the first cross member 1, the longitudinal member 2, and the second cross member 3 are welded and assembled by the first cast aluminum connector 5 and the second cast aluminum connector 6. However, the cast aluminum connecting piece has the problems of heavy weight and low strength (the yield strength of the cast aluminum piece is about 200 MPa), and the cost of the casting process is high, so that the requirements of the connecting strength, light weight and low cost of the automobile floor beam assembly are difficult to meet.
Disclosure of Invention
The invention provides an assembly and connection structure of an automobile floor beam, and aims to realize reliable connection of parts in an aluminum alloy floor beam assembly by additionally arranging an extrusion-molded aluminum alloy connecting piece, so as to achieve the purposes of ensuring the connection strength of the automobile floor beam and meeting the design requirements of light weight and low cost.
In order to realize the purpose, the invention adopts the following technical scheme:
an assembly connecting structure of an automobile floor beam is characterized in that a first connecting piece is arranged at the joint of the end part of a first cross beam and a longitudinal beam, and a second connecting piece is arranged at the joint of the middle part of a second cross beam and the longitudinal beam; the first connecting piece is of a hollow cavity structure, is provided with an arc-shaped top surface extending towards the front side and the rear side, is connected with the first cross beam through the front side extending part of the arc-shaped top surface, the front side wall of the cavity and the bottom surface of the cavity in a spot welding manner, and is connected with the end part of the longitudinal beam through the rear side extending part of the arc-shaped top surface and the rear side wall of the cavity in a spot welding manner; the second connecting piece is a T-shaped hollow shell, the upper end and the lower end of the second connecting piece are of an open structure, a longitudinal beam penetrating groove and a cross beam penetrating groove are formed in the side wall of the second connecting piece, the longitudinal beam penetrates through the longitudinal beam penetrating groove, the left side wall and the right side wall of the longitudinal beam are connected with the longitudinal inner wall of the T-shaped hollow shell in a spot welding mode, the end portion of the second cross beam penetrates through the cross beam penetrating groove, and the front side wall and the rear side wall of the second cross beam are connected with the transverse inner wall of the T-shaped hollow shell in a spot welding mode.
In the assembly and connection structure of the automobile floor beam, in the second connecting piece, the welding surfaces of the longitudinal inner wall of the T-shaped hollow shell and the transverse inner wall of the T-shaped hollow shell are of boss structures protruding inwards.
According to the assembly and connection structure of the automobile floor beam, the reinforcing rib plate is arranged in the hollow cavity of the first connecting piece, the reinforcing rib plate is perpendicular to the arc-shaped top surface, and the hollow cavity of the first connecting piece is divided into the first cavity and the second cavity through the reinforcing rib plate.
In the assembly and connection structure of the automobile floor beam, the front side wall of the first cavity of the first connecting piece and the front side extending part of the arc-shaped top surface are both transversely widened structures.
Above-mentioned assembly connection structure of car floor roof beam, first connecting piece, second connecting piece all adopt the aluminum alloy material, and the strip section bar that matches with first connecting piece or second connecting piece structure is split into a plurality of first connecting piece or second connecting piece blank by the strip section bar through the extrusion technology shaping, and the final shaping of first connecting piece or second connecting piece is accomplished to rethread machine tooling mode.
The invention provides an assembly and connection structure of an automobile floor beam, which can reliably connect all parts in an automobile aluminum alloy bottom plate beam assembly by a first connecting piece arranged at the joint of the end part of a first cross beam and a longitudinal beam and a second connecting piece arranged at the joint of the middle part of a second cross beam and the longitudinal beam through matching an aluminum alloy spot welding process, wherein in the aspect of materials, the first connecting piece and the second connecting piece are both made of aluminum alloy materials, and the yield strength of the materials can generally reach more than 280MPa and is 40-100% higher than the strength of cast aluminum connecting pieces and the strength of plates of the cross beams and the longitudinal beams; in the aspect of structure, the first connecting piece is a cavity structure, the axis of the cavity is parallel to the first cross beam, the second connecting piece is a T-shaped hollow shell, and the first connecting piece and the second connecting piece have high section rigidity and are not easy to bend and deform; in the manufacturing process, the first connecting piece and the second connecting piece can be molded into strip-shaped sections through an extrusion process, and then the manufacturing process of the single parts is completed through a cutting and machining mode, so that the development cost of the extrusion molding die is far lower than that of a casting die, the development cycle of the extrusion molding die is only 1/3 of that of a casting part, and meanwhile, the energy consumption of the molding process is low, and the requirement of low carbon is met. In conclusion, the invention realizes the reliable connection of parts in the aluminum alloy floor beam assembly and achieves the aims of ensuring the connection strength of the automobile floor beam and meeting the requirements of light weight and low cost.
Drawings
FIG. 1 is a schematic view of a connection structure of an aluminum alloy floor beam of an automobile in a spot welding manner in the prior art;
FIG. 2 is an enlarged view of the structure at I in FIG. 1;
FIG. 3 is an enlarged view of the structure II in FIG. 1;
FIG. 4 is a schematic view of an assembly structure of an aluminum alloy floor beam of an automobile through a cast aluminum connector in the prior art;
FIG. 5 is a schematic view of an assembly structure of the floor beam for a vehicle according to the present invention;
FIG. 6 is an enlarged view of the structure at III in FIG. 5;
FIG. 7 is a schematic view of a first connector configuration;
FIG. 8 is an enlarged view of the structure at IV in FIG. 5;
fig. 9 is a schematic view of a second connector structure.
The figures are numbered as follows:
1 is a first beam; 2 is a longitudinal beam; 3 is a second beam; 4 is a process gap; 5 is a first cast aluminum connector; 6 is a second cast aluminum connector; 7 is a first connecting piece, 7-1 is an arc top surface, 7-2 is a first cavity, 7-3 is a reinforcing rib plate, and 7-4 is a second cavity; 8 is a second connecting piece, 8-1 is a longitudinal beam passing groove, 8-2 is a cross beam passing groove, 8-3 is a longitudinal inner wall of the T-shaped hollow shell, and 8-4 is a transverse inner wall of the T-shaped hollow shell.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Referring to fig. 5, the assembly and connection structure for floor beams of an automobile according to the present invention is provided with a first connecting member 7 at a junction between the end portions of a first cross member 1 and a longitudinal member 2, and a second connecting member 8 at a junction between the middle portion of a second cross member 3 and the longitudinal member 2; the first connecting piece 7 and the second connecting piece 8 are both made of aluminum alloy materials, are firstly formed into strip-shaped sections matched with the first connecting piece or the second connecting piece through an extrusion process, then are divided into a plurality of blank pieces of the first connecting piece 7 or the second connecting piece 8 through the strip-shaped sections, and finally are formed into the first connecting piece 7 or the second connecting piece 8 through a machining mode.
Referring to fig. 5, 6 and 7, in the assembly and connection structure of the automobile floor beam, a first connecting member 7 is a hollow cavity structure, and is provided with arc-shaped top surfaces 7-1 extending to the front side and the rear side, a reinforcing rib plate 7-3 is arranged in the hollow cavity, the reinforcing rib plate 7-3 is perpendicular to the arc-shaped top surfaces 7-1, the hollow cavity of the first connecting member 7 is divided into a first cavity 7-2 and a second cavity 7-4 through the reinforcing rib plate 7-3, the front side wall of the first cavity 7-2 and the front side extension of the arc-shaped top surface 7-1 are both transversely widened structures, and the first connecting member 7 is connected with the end part of a longitudinal beam 1 through the front side extension of the arc-shaped top surface 7-1, the front side wall of the first cavity 7-2 and the bottom surface of the first cavity 7-2 in a spot welding manner, and is connected with the end part of the longitudinal beam 2 through the rear side extension of the arc-shaped top surface 7-1 and the rear side wall of the second cavity 7-4 in a spot welding manner.
Referring to fig. 5, 8 and 9, in the assembly and connection structure of the automobile floor beam, a second connecting piece 8 is a T-shaped hollow shell, the upper end and the lower end of the second connecting piece are open structures, a longitudinal beam passing groove 8-1 and a transverse beam passing groove 8-2 are arranged on the side wall of the second connecting piece, the longitudinal beam 2 passes through the longitudinal beam passing groove 8-1, the left side wall and the right side wall of the longitudinal beam 2 are connected with the longitudinal inner wall 8-3 of the T-shaped hollow shell in a spot welding manner, the end part of the second transverse beam 3 passes through the transverse beam passing groove 8-2, the front side wall and the rear side wall of the second transverse beam 3 are connected with the transverse inner wall 8-4 of the T-shaped hollow shell in a spot welding manner, and the welding surfaces of the longitudinal inner wall 8-3 of the T-shaped hollow shell and the transverse inner wall 8-4 of the T-shaped hollow shell are boss structures protruding inwards.
Referring to fig. 1 to 9, in order to overcome the disadvantages of the connection method of the steel stamped parts shown in fig. 1 to 3 and the connection method of the cast aluminum connector shown in fig. 4 after the automobile floor beam parts are made of aluminum alloy, the invention provides an assembly connection structure of an automobile floor beam, which is provided with a first connector 7 at the joint of the first cross beam 1 and the end part of the longitudinal beam 2, wherein the first connector 7 is connected with the first cross beam 1 through the front side extension of the arc-shaped top surface 7-1, the front side wall of the first cavity 7-2 and the bottom surface of the first cavity 7-2 by spot welding, and is connected with the end part of the longitudinal beam 2 through the rear side extension of the arc-shaped top surface 7-1 and the rear side wall of the second cavity 7-4 by spot welding, thereby realizing the reliable connection of the longitudinal beam 2 and the first cross beam. According to the invention, the second connecting piece 8 is arranged at the joint of the second cross beam 3 and the middle part of the longitudinal beam 2, so that the longitudinal beam 2 can penetrate through the longitudinal beam through groove 8-1 of the second connecting piece 8, the left side wall and the right side wall of the longitudinal beam 2 are connected with the longitudinal inner wall 8-3 of the T-shaped hollow shell in a spot welding manner, meanwhile, the end part of the second cross beam 3 penetrates through the cross beam through groove 8-2 of the second connecting piece 8, and the front side wall and the rear side wall of the second cross beam 3 are connected with the transverse inner wall 8-4 of the T-shaped hollow shell in a spot welding manner, thereby realizing the reliable connection of the longitudinal beam 2 and the second cross beam 3.
Claims (5)
1. The utility model provides an assembly connection structure of car floor beam which characterized in that: a first connecting piece (7) is arranged at the joint of the end parts of a first cross beam (1) and a longitudinal beam (2), and a second connecting piece (8) is arranged at the joint of the middle parts of a second cross beam (3) and the longitudinal beam (2); the first connecting piece (7) is of a hollow cavity structure, is provided with an arc-shaped top surface (7-1) extending towards the front side and the rear side, is connected with the first cross beam (1) through the front side extension part of the arc-shaped top surface (7-1), the front side wall of the cavity and the bottom surface of the cavity in a spot welding manner, and is connected with the end part of the longitudinal beam (2) through the rear side extension part of the arc-shaped top surface (7-1) and the rear side wall of the cavity in a spot welding manner; the T-shaped hollow shell is characterized in that the second connecting piece (8) is a T-shaped hollow shell, the upper end and the lower end of the T-shaped hollow shell are of an open structure, a longitudinal beam penetrating groove (8-1) and a transverse beam penetrating groove (8-2) are arranged on the side wall of the T-shaped hollow shell, the longitudinal beam (2) penetrates through the longitudinal beam penetrating groove (8-1), the left side wall and the right side wall of the longitudinal beam (2) are connected with the longitudinal inner wall (8-3) of the T-shaped hollow shell in a spot welding mode, the end portion of the second transverse beam (3) penetrates through the transverse beam penetrating groove (8-2), and the front side wall and the rear side wall of the second transverse beam (3) are connected with the transverse inner wall (8-4) of the T-shaped hollow shell in a spot welding mode.
2. The assembling and connecting structure of floor beam for vehicle according to claim 1, wherein: in the second connecting piece (8), the welding surfaces of the longitudinal inner wall (8-3) of the T-shaped hollow shell and the transverse inner wall (8-4) of the T-shaped hollow shell are of an inward-protruding boss structure.
3. The fitting connection structure of an automobile floor beam according to claim 1 or 2, wherein: and a reinforcing rib plate (7-3) is arranged in the hollow cavity of the first connecting piece (7), the reinforcing rib plate (7-3) is perpendicular to the arc-shaped top surface (7-1), and the hollow cavity of the first connecting piece (7) is divided into a first cavity (7-2) and a second cavity (7-4) through the reinforcing rib plate (7-3).
4. An assembling and connecting structure of an automobile floor beam according to claim 3, wherein: the front side wall of the first cavity (7-2) of the first connecting piece (7) and the front side extension of the arc-shaped top surface (7-1) are both transversely widened structures.
5. The assembling and connecting structure of floor beam for vehicle according to claim 4, wherein: the first connecting piece (7) and the second connecting piece (8) are both made of aluminum alloy materials, are formed into strip-shaped sections matched with the first connecting piece or the second connecting piece through an extrusion process, are divided into blank pieces of a plurality of first connecting pieces (7) or second connecting pieces (8) through the strip-shaped sections, and then are machined to complete final forming of the first connecting pieces (7) or the second connecting pieces (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220989803.4U CN217835795U (en) | 2022-04-26 | 2022-04-26 | Assembly connection structure of automobile floor beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220989803.4U CN217835795U (en) | 2022-04-26 | 2022-04-26 | Assembly connection structure of automobile floor beam |
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| CN217835795U true CN217835795U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220989803.4U Active CN217835795U (en) | 2022-04-26 | 2022-04-26 | Assembly connection structure of automobile floor beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116552654A (en) * | 2023-07-07 | 2023-08-08 | 威驰腾(福建)汽车有限公司 | Scooter chassis and forming method thereof |
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2022
- 2022-04-26 CN CN202220989803.4U patent/CN217835795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116552654A (en) * | 2023-07-07 | 2023-08-08 | 威驰腾(福建)汽车有限公司 | Scooter chassis and forming method thereof |
| CN116552654B (en) * | 2023-07-07 | 2023-09-22 | 威驰腾(福建)汽车有限公司 | Scooter chassis and forming method thereof |
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