CN111605616B - Automobile front longitudinal beam assembly, automobile chassis structure and electric automobile - Google Patents
Automobile front longitudinal beam assembly, automobile chassis structure and electric automobile Download PDFInfo
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- CN111605616B CN111605616B CN202010361554.XA CN202010361554A CN111605616B CN 111605616 B CN111605616 B CN 111605616B CN 202010361554 A CN202010361554 A CN 202010361554A CN 111605616 B CN111605616 B CN 111605616B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
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Abstract
The invention provides an automobile front longitudinal beam assembly, an automobile chassis structure and an electric automobile, wherein the front longitudinal beam assembly comprises a front longitudinal beam section, a lower part of a rear longitudinal beam section and an upper part of the rear longitudinal beam section; the lower part of the rear section of the front longitudinal beam and the upper part of the rear section of the front longitudinal beam are spliced by a friction stir welding process to form a rear section of the front longitudinal beam; the rear section of the front longitudinal beam and the front section of the front longitudinal beam are connected through friction stir welding to form a front longitudinal beam assembly; by adopting the scheme, the defects of material performance reduction, thermal stress concentration and the like caused by welding can be effectively avoided, the structural performance of the longitudinal beam is more stable, and the strength of the longitudinal beam is effectively improved; toxic smoke and toxic gas are not generated, the body health of an operator can be better protected, and the environmental pollution is reduced; the whole weight of the electric automobile is small, the strength is high, the collision safety performance is better, the electric automobile is light, and the endurance mileage of the electric automobile can be effectively prolonged.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to an automobile front longitudinal beam assembly, an automobile chassis structure and an electric automobile.
Background
The electric automobile as a new energy automobile has the advantages of energy conservation and environmental protection; at present, the electric automobile is limited by the battery endurance mileage, and a higher requirement is put forward on the light weight of an automobile body.
The electric vehicle body which accounts for the largest proportion in the current market is formed by reforming a traditional fuel vehicle; the front longitudinal beam of the automobile body is formed by a steel plate metal plate and is connected through a spot welding process, so that a plurality of parts are required, the investment of a die is large, and meanwhile, a welded steel plate assembly of the automobile body also needs electrophoresis corrosion resistance, so that the pollution is large, and the environmental protection requirement is not facilitated; the other part of the novel electric vehicle body is made of aluminum alloy materials, and the front longitudinal beam is manufactured by using a vacuum die-casting process, so that the cost of a vacuum die-casting mould is high, the weight of a die-casting piece is large, the quality control cost of parts is high, and the aim of lightening the vehicle body is not facilitated; and the welding performance of the vacuum die-casting aluminum part is poor, so that the connection mode of the front longitudinal beam and the peripheral lap joint part cannot adopt only a welding process, and the complexity of the manufacturing process and the manufacturing cost are increased invisibly.
Based on the technical problems existing in the manufacturing process of the electric automobile, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to provide an automobile front longitudinal beam assembly, an automobile chassis structure and an electric automobile aiming at overcoming the defects in the prior art, and aims to solve one of the problems of high pollution, high cost and high processing difficulty in the manufacturing process of the conventional electric automobile.
The invention provides an automobile front longitudinal beam assembly, which comprises a front longitudinal beam front section, a front longitudinal beam rear section lower part and a front longitudinal beam rear section upper part, wherein the front longitudinal beam front section is provided with a front longitudinal beam front end and a front longitudinal beam rear end; the lower part of the rear section of the front longitudinal beam and the upper part of the rear section of the front longitudinal beam are spliced by a friction stir welding process to form a rear section of the front longitudinal beam; the front longitudinal beam rear section and the front longitudinal beam front section are connected through friction stir welding to form a front longitudinal beam assembly.
Furthermore, the lower part of the rear section of the front longitudinal beam comprises a rear section outer beam of the front longitudinal beam and a rear section inner reinforcing beam of the front longitudinal beam; the front longitudinal beam rear section inner reinforcing beam is sleeved in the front longitudinal beam rear section outer beam, and the tail ends of the front longitudinal beam rear section outer beam and the front longitudinal beam rear section inner reinforcing beam are integrated through stretch bending.
Furthermore, the upper part of the rear section of the front longitudinal beam is arranged at the top of the lower part of the rear section of the front longitudinal beam; the front section of the front longitudinal beam is connected with one end part of the rear section of the front longitudinal beam.
Furthermore, the front longitudinal beam front section, the front longitudinal beam rear section lower part and the front longitudinal beam rear section upper part are all formed by aluminum alloy extrusion forming and then CNC machining.
Furthermore, the front section of the front longitudinal beam is formed by extrusion of 6082T 6 aluminum alloy material; the front section of the front longitudinal beam is of a hollow structure, and the cross section of the front longitudinal beam is in a shape like a Chinese character 'mu'.
Furthermore, the upper part of the rear section of the front longitudinal beam is formed by extrusion of 6082T 6 aluminum alloy material; the upper part of the rear section of the front longitudinal beam is of a hollow structure, and the cross section of the upper part of the rear section of the front longitudinal beam is in a square shape.
Further, the front longitudinal beam rear section outer beam is formed by extrusion of 6082T 6 aluminum alloy material; the front longitudinal beam rear section outer beam is of a hollow structure, and the cross section of the front longitudinal beam rear section outer beam is in a shape of Chinese character ri; and the bottom of the outer beam at the rear section of the front longitudinal beam is provided with a mounting clamping groove.
Further, the front longitudinal beam rear section inner reinforcing beam is made of 6082T 6 aluminum alloy materialCarrying out over extrusion forming; the front longitudinal beam rear section inner stiffening beam is of a hollow structure, and the cross section of the front longitudinal beam rear section inner stiffening beam is "
And (4) type.
Correspondingly, the invention also provides an automobile chassis structure, which comprises an automobile front longitudinal beam assembly, a front protective beam assembly, a front cabin rear beam assembly and a threshold beam assembly, wherein the automobile front longitudinal beam assembly is the automobile front longitudinal beam assembly; the automobile front longitudinal beam assembly is symmetrically connected to two ends of the front protective beam assembly, one end of the automobile front longitudinal beam assembly is fixedly connected with the front protective beam assembly through the front section of the front longitudinal beam, the other end of the automobile front longitudinal beam assembly is fixedly connected with the front cabin rear beam assembly through the rear section of the front longitudinal beam, and the stretch bending part at the lower part of the rear section of the front longitudinal beam is directly and fixedly connected with the front cabin rear beam assembly; the front cabin rear cross beam assembly is also fixedly connected with the threshold beam assembly; the direction of the front cabin rear cross beam assembly is mutually vertical to the direction of the automobile front longitudinal beam assembly.
Correspondingly, the invention further provides an electric automobile which comprises an automobile chassis structure, wherein the automobile chassis structure is the automobile chassis structure.
Compared with the prior art, the scheme provided by the invention has the following technical effects:
firstly, the scheme provided by the invention utilizes the extrusion forming process of the aluminum alloy section to ensure that the whole vehicle normally reduces weight by more than thirty percent, and can effectively reduce the cost;
secondly, according to the scheme provided by the invention, the unequal-section longitudinal beam formed by splicing two aluminum profiles by adopting a friction stir welding process is utilized, so that the weight and the deformation of parts are reduced, and the welding strength of the parts is improved;
thirdly, according to the scheme provided by the invention, the two square-shaped sectional materials are sleeved, overlapped, bent and formed, so that the structural strength of the root part of the longitudinal beam is effectively improved.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a perspective view of a front longitudinal beam assembly connection structure of an automobile according to the present invention;
FIG. 2 is an exploded view of a front side member assembly connection structure of an automobile according to the present invention;
FIG. 3 is a front view of a front rail assembly attachment structure for an automobile according to the present invention;
FIG. 4 is a schematic structural view of a lower assembly of a rear section of a front longitudinal beam of an automobile according to the present invention;
FIG. 5 is an exploded view of the lower assembly of the rear section of the front longitudinal beam of the automobile of the present invention;
FIG. 6 is a first cross-sectional view of the lower portion of the rear section of the front longitudinal beam of the automobile in accordance with the present invention;
FIG. 7 is a second cross-sectional view of the lower portion of the rear section of the front longitudinal beam of the automobile in accordance with the present invention;
FIG. 8 is a front section of the front side member of the present invention;
FIG. 9 is a cross-sectional view of the front longitudinal member front section of the automobile of the present invention;
FIG. 10 is a schematic structural view of the upper portion of the rear section of the front longitudinal beam of the automobile according to the present invention;
FIG. 11 is a sectional view of the upper structure of the rear section of the front longitudinal beam of the automobile according to the present invention;
FIG. 12 is a structural diagram of an external reinforcing beam at the lower part of the rear section of the front longitudinal beam of the automobile;
FIG. 13 is a cross-sectional view of the structure of the reinforcing beam applied to the lower part of the rear section of the front longitudinal beam of the automobile;
FIG. 14 is a schematic structural view of an inner reinforcing beam at the lower part of the rear section of the front longitudinal beam of the automobile;
FIG. 15 is a cross-sectional view of the lower inner reinforcement beam of the rear section of the front side member of the automobile according to the present invention;
FIG. 16 is a drawing of the present invention "
A schematic diagram of a type friction stir welding track;
FIG. 17 is a schematic view of the force transmission path of the front longitudinal beam assembly of the automobile.
In the figure: 1. a front longitudinal beam front section; 2. the lower part of the rear section of the front longitudinal beam; 21. a front longitudinal beam rear section outer beam; 211. a cavity; 22. a front longitudinal beam rear section inner stiffening beam; 3. the upper part of the rear section of the front longitudinal beam; 4. a friction welding trajectory; 10. a front rail assembly; 20. a front bumper beam assembly; 30. a front cabin rear cross beam assembly; 40. threshold roof beam assembly.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 16, the present invention provides a front longitudinal beam assembly for an automobile, which can be applied to a chassis of an existing electric automobile; specifically, the front longitudinal beam assembly comprises a front longitudinal beam front section 1, a front longitudinal beam rear section lower part 2 and a front longitudinal beam rear section upper part 3; the front longitudinal beam rear section and the front longitudinal beam front section 1 are connected through friction stir welding to form a front longitudinal beam assembly; specifically, the upper part 3 of the rear section of the front longitudinal beam is of a straight strip structure and is fixedly arranged at the top of the lower part 2 of the rear section of the front longitudinal beam; the front section 1 of the front longitudinal beam is connected with one end part of the rear section of the front longitudinal beam, so that an automobile front longitudinal beam assembly structure is formed; specifically, as shown in fig. 16, employed in the integral joint structure are a front side member front section 1, a front side member rear section lower section 2, and a front side member rear section upper section 3 "
Connecting the' type friction stir welding rails 4; in the connecting structure, the defects caused by the MIG or CMT welding process can be avoided by adopting the friction welding process, and the structural strength and the dimensional accuracy of the longitudinal beam are effectively improved; furthermore, the welding between the upper profile beam and the lower profile beam at the rear section of the front longitudinal beam adopts a friction stir welding process, so that the defects of material performance reduction, thermal stress concentration and the like caused by welding can be effectively avoided, the structural performance of the longitudinal beam is more stable, and the strength of the longitudinal beam is effectively improved; the friction stir welding is different from the welding, toxic smoke and toxic gas cannot be generated, the body health of an operator can be better protected, and the environmental pollution is reduced; meanwhile, because the welding deformation caused by thermal deformation is less, the finishing process of the plate side welding bead can be omitted, and the correction of the welding deformation can be reducedWorking hours; in addition, the friction stir welding adopts simple equipment, has few technological parameters and is easy to control, the welding seam has no solidification structure, the defects related to material melting can not be generated, the welding stress or deformation is small, and the joint performance is good.
Preferably, in combination with the above, as shown in fig. 1 to 16, the front side member rear section lower portion 2 includes a front side member rear section outer beam 21 and a front side member rear section inner reinforcing beam 22; the front longitudinal beam rear section outer beam 21 is internally sleeved with the front longitudinal beam rear section inner reinforcing beam 22, and the tail ends of the front longitudinal beam rear section outer beam 21 and the front longitudinal beam rear section inner reinforcing beam 22 are formed into a whole through 2D bending; specifically, the front longitudinal beam rear section lower part 2 is formed by precisely assembling a front longitudinal beam rear section outer beam 21 and a front longitudinal beam rear section inner reinforcing beam 22 into an assembly, and then forming the assembly by adopting a 2D stretch bending process, wherein the 2D roll bending precision reaches +/-0.5 mm, so that the strength and the size precision of the lower section root can be effectively ensured; meanwhile, the lower part 2 of the rear section of the front longitudinal beam is divided into two layers, stress can be transferred along two directions in the collision process (see figure 17), and the members can be better protected in the collision process; the front longitudinal beam rear section outer beam 21 is sleeved with the front longitudinal beam rear section inner reinforcing beam 22, the 2D stretch bending technology is adopted after the sleeving, any welding means is not used, the material performance can be kept unchanged, and the structural strength of the root part of the longitudinal beam is improved.
Preferably, in combination with the above solutions, as shown in fig. 1 to 16, the front longitudinal beam front section 1, the front longitudinal beam rear section lower portion 2 and the front longitudinal beam rear section upper portion 3 are all formed by extrusion molding of aluminum alloy and then by CNC processing; in the scheme of the application, the front section 1 of the front longitudinal beam, the lower part 2 of the rear section of the front longitudinal beam and the upper part 3 of the rear section of the front longitudinal beam adopt the aluminum alloy longitudinal beam structure, so that the weight of parts can be reduced, welding spots can be reduced, the difficulty of a welding process can be reduced, and the structural strength of key stress points can be improved; meanwhile, the problems of large fixing investment and unstable stress of products of the aluminum alloy die castings can be avoided; by adopting the aluminum alloy longitudinal beam structure, more than thirty percent of weight can be reduced on the basis of the traditional steel plate longitudinal beam, the pollution to the environment is reduced and reduced, and the structural strength and the collision performance are not reduced; further, the front section 1 of the front longitudinal beam, the outer beam 21 of the rear section of the front longitudinal beam, the inner reinforcing beam 22 of the rear section of the front longitudinal beam and the upper part 3 of the rear section of the front longitudinal beam are all formed by extrusion forming of high-precision aluminum alloy and CNC machining; the CNC machining generally refers to computer numerical control precision machining, and specifically comprises a CNC machining lathe, a CNC machining milling machine, a CNC machining boring and milling machine and the like; by adopting the CNC machining technology, the number of tools can be greatly reduced, the parts with complex shapes are machined without complex tools, and if the shapes and the sizes of the parts are changed, only part machining programs need to be modified, so that the CNC machining technology is suitable for new product development and modification; meanwhile, the machining quality is stable, the machining precision is high, the repetition precision is high, the machining requirement of an aircraft is met, complex molded surfaces which are difficult to machine by a conventional method can be machined, even machining parts which cannot be observed can be machined, the time for production preparation, machine tool adjustment and procedure inspection can be shortened, and the cutting time is shortened due to the use of the optimal cutting amount.
Preferably, with the above solutions, as shown in fig. 1 to 16, in the present embodiment, the front side member front section 1 is formed by extruding and molding 6082T 6 aluminum alloy material, and then machining the aluminum alloy material by using a machining center, and has a cross section in a "mesh" shape (as shown in fig. 9); the yield strength of the 6082T 6 aluminum alloy material can reach 285Mpa, and the manufacturing precision of CNC can reach +/-0.3 mm; furthermore, the front longitudinal beam front section 1 is of a hollow structure, the cross section of the front longitudinal beam front section 1 is in a shape of Chinese character mu, the cross section of the front longitudinal beam front section 1 has good mechanical properties, and a cavity is formed inside the front longitudinal beam front section 1, so that the weight can be reduced, and the structural rigidity can be improved; the automobile front longitudinal beam assembly can be applied to an electric vehicle, meets the light weight requirement of the whole vehicle, can improve the driving mileage of the electric vehicle, and improves the collision performance and the bending rigidity of a vehicle body.
Preferably, with the above solution, as shown in fig. 1 to 16, the front side member rear section upper portion 3 is formed by extrusion molding of 6082T 6 aluminum alloy material and machining through a machining center, and has a cross section in a "square" shape (as shown in fig. 11); the yield strength of the 6082T 6 aluminum alloy material can reach 285Mpa, and the manufacturing precision of CNC can reach +/-0.3 mm; furthermore, the upper part 3 of the rear section of the front longitudinal beam is of a hollow structure, the cross section of the upper part 3 of the rear section of the front longitudinal beam is in a shape like a Chinese character 'kou', the section of the upper part 3 of the rear section of the front longitudinal beam has good mechanical characteristics, and a cavity is formed inside the upper part, so that the weight can be reduced, and the rigidity of the structure can be improved; the automobile front longitudinal beam assembly can be applied to an electric vehicle, meets the requirement of light weight of the whole vehicle, can improve the endurance mileage of the electric vehicle, and improves the collision performance and the bending rigidity of a vehicle body.
Preferably, with the above solutions, as shown in fig. 1 to 16, the front-side-member rear-section outer beam 21 is formed by extruding and molding 6082T 6 aluminum alloy material, and then machining through a machining center, the cross section of the front-side-member rear-section outer beam 21 is of a "herringbone" structure (as shown in fig. 13), and the bottom of the front-side-member rear-section outer beam 21 is provided with a mounting slot; the yield strength of the 6082T 6 aluminum alloy material can reach 285Mpa, and the manufacturing precision of CNC can reach +/-0.3 mm; furthermore, the front longitudinal beam rear section outer beam 21 is of a hollow structure, the cross section of the front longitudinal beam rear section outer beam 21 is in a shape of Chinese character ri, the cross section of the front longitudinal beam rear section outer beam 21 has good mechanical properties, and a cavity is arranged in the front longitudinal beam rear section outer beam 21, so that the weight is reduced, and the structural rigidity is improved; the bottom of the front longitudinal beam rear section outer beam 21 is provided with an installation clamping groove, and installation and positioning are carried out in the direction; the automobile front longitudinal beam assembly can be applied to an electric vehicle, meets the requirement of light weight of the whole vehicle, can improve the endurance mileage of the electric vehicle, and improves the collision performance and the bending rigidity of a vehicle body.
Preferably, in combination with the above, as shown in fig. 1 to 16, the front-side-member rear-section inner reinforcement beam 22 is formed by extrusion molding of 6082T 6 aluminum alloy material and machining through the machining center, and the cross section of the front-side-member rear-section inner reinforcement beam 22 is ninety degrees "
"glyph structure (as shown in FIG. 15); the yield strength of the 6082T 6 aluminum alloy material can reach 285Mpa, and the manufacturing precision of CNC reaches +/-0.3 mm; the front-side member rear-section inner reinforcement beam 22 is of a hollow structure, and the cross section of the front-side member rear-section inner reinforcement beam 22 is "
The section of the front longitudinal beam rear section inner reinforcing beam 22 has good mechanical properties, and a cavity is arranged in the front longitudinal beam rear section inner reinforcing beam, so that the design not only reduces the weight, but also improves the structural rigidity; the automobile front longitudinal beam assembly can be applied to an electric vehicle, meets the requirement of light weight of the whole vehicle, can improve the endurance mileage of the electric vehicle, and improves the collision performance and the bending rigidity of a vehicle body.
Preferably, in combination with the above scheme, the 6082T 6 aluminum alloy material adopted by the automobile front longitudinal beam assembly of the present application is specifically: 6082 the alloy is heat treated to strengthen the alloy, and has good formability, weldability and machinability; 6082 is a heat treatment strengthening alloy, has good formability, weldability, machinability and corrosion resistance, also has medium strength, can still maintain better operability after annealing, and is mainly used for mechanical structures, including bars, plates, pipes, profiles and the like; this alloy has mechanical properties similar to, but not identical to, those of 6061 alloy, and the 6082-T6 temper has superior mechanical properties.
Correspondingly, in combination with the above solutions, as shown in fig. 1 to 17, and in particular fig. 17, the present invention further provides an automobile chassis structure, which can be applied to an existing electric automobile; the automobile chassis structure specifically comprises an automobile front longitudinal beam assembly 10, a front protective cross beam assembly 20, a front cabin rear cross beam assembly 30 and a threshold beam assembly 40; the automobile front longitudinal beam assembly 10 is the automobile front longitudinal beam assembly; furthermore, the automobile front longitudinal beam assembly 10 is symmetrically connected to two ends of the front protective beam assembly 20, one end of the automobile front longitudinal beam assembly 10 is fixedly connected with the front protective beam assembly 20 through the front section 1 of the front longitudinal beam, the other end of the automobile front longitudinal beam assembly 10 is fixedly connected with the front cabin rear beam assembly 30 through the rear section of the front longitudinal beam, and meanwhile, the stretch bending part of the lower part 2 of the rear section of the front longitudinal beam is directly and fixedly connected with the front cabin rear beam assembly 30; the front cabin rear cross beam assembly 30 is also fixedly connected with the threshold beam assembly 40, so that a chassis structure is formed; specifically, the directions of the front cabin rear cross beam assembly 30 and the automobile front longitudinal beam assembly 10 are mutually perpendicular, so that the stress of the electric vehicle can be transferred along two directions F (see figure 17) in the collision process, and the electric vehicle can better protect members in the collision process; simultaneously, the upper square-shaped section and the lower square-shaped section of each part in the automobile front longitudinal beam assembly in the scheme are connected by adopting a friction stir welding process, the friction stir welding process parameters are few and are easy to control, a welding line has no solidification structure, the welding stress is small, the stress of the front longitudinal beam can be transmitted to an automobile body along the sections of the two sections when the front longitudinal beam collides at a high speed, the stress stability is good, and the automobile body is enabled to have higher safety.
Correspondingly, in combination with the above solutions, as shown in fig. 1 to 17, the present invention further provides an electric vehicle, including a vehicle chassis structure, wherein the vehicle chassis structure is the above vehicle chassis structure; by adopting the automobile chassis structure, the whole weight of the existing electric automobile is small, the strength is high, the collision safety performance is more excellent, the light weight of the electric automobile is facilitated, and the endurance mileage of the electric automobile can be effectively prolonged.
In the scheme provided by the invention, each single piece of the front longitudinal beam assembly is formed by processing a high-precision extruded aluminum alloy profile through CNC (computer numerical control), the yield strength of a 6082T 6 aluminum alloy material reaches 285Mpa, and the manufacturing precision of CNC reaches +/-0.3 mm, so that each single piece and each single piece can be connected by adopting a friction stir welding process, the whole weight is small, the strength is high, the collision safety performance is better, the light weight of an electric automobile is facilitated, and the endurance mileage of the electric automobile can be effectively prolonged.
Compared with the prior art, the scheme provided by the invention has the following technical effects:
firstly, the scheme provided by the invention utilizes the extrusion forming process of the aluminum alloy section to ensure that the whole vehicle normally reduces weight by more than thirty percent, and can effectively reduce the cost;
secondly, according to the scheme provided by the invention, the unequal-section longitudinal beam formed by splicing two aluminum profiles by adopting a friction stir welding process is utilized, so that the weight and the deformation of the part are reduced, and the welding strength of the part is improved;
thirdly, according to the scheme provided by the invention, the two square-shaped sectional materials are sleeved, overlapped, bent and formed, so that the structural strength of the root part of the longitudinal beam is effectively improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (7)
1. An automobile front longitudinal beam assembly is used on a chassis of an existing electric automobile; the front-rear-section longitudinal beam is characterized by comprising a front longitudinal beam front section (1), a front longitudinal beam rear-section lower part (2) and a front longitudinal beam rear-section upper part (3); the lower part (2) of the rear section of the front longitudinal beam and the upper part (3) of the rear section of the front longitudinal beam are spliced by a friction stir welding process to form the rear section of the front longitudinal beam; the front longitudinal beam rear section and the front longitudinal beam front section (1) are connected through friction stir welding to form a front longitudinal beam assembly; the upper part (3) of the rear section of the front longitudinal beam is arranged at the top of the lower part (2) of the rear section of the front longitudinal beam; the front section (1) of the front longitudinal beam is connected to one end part of the rear section of the front longitudinal beam; the lower part (2) of the rear section of the front longitudinal beam comprises an outer beam (21) of the rear section of the front longitudinal beam and an inner reinforcing beam (22) of the rear section of the front longitudinal beam; the front longitudinal beam rear section outer beam (21) is internally sleeved with the front longitudinal beam rear section inner reinforcing beam (22), and the tail ends of the front longitudinal beam rear section outer beam (21) and the front longitudinal beam rear section inner reinforcing beam (22) are integrated through bending; the front longitudinal beam rear section lower part (2) is formed by precisely assembling the front longitudinal beam rear section outer beam (21) and the front longitudinal beam rear section inner reinforcing beam (22) into an assembly and then forming the assembly by adopting a 2D stretch bending process; the front longitudinal beam front section (1), the front longitudinal beam rear section lower part (2) and the front longitudinal beam rear section upper part (3) are all formed by aluminum alloy extrusion forming and then CNC machining.
2. The automobile front longitudinal beam assembly according to claim 1, characterized in that the front longitudinal beam front section (1) is formed by extrusion molding of 6082T 6 aluminum alloy material; the front longitudinal beam front section (1) is of a hollow structure, and the cross section of the front longitudinal beam front section (1) is in a shape of a Chinese character 'mu'.
3. The automobile front longitudinal beam assembly according to claim 1, characterized in that the front longitudinal beam rear section upper part (3) is formed by extrusion molding of 6082T 6 aluminum alloy material; the upper part (3) of the rear section of the front longitudinal beam is of a hollow structure, and the cross section of the upper part of the rear section of the front longitudinal beam is square.
4. The automobile front side member assembly according to claim 1, wherein the front side member rear section outer beam (21) is formed by extrusion molding of 6082T 6 aluminum alloy material; the front longitudinal beam rear section outer beam (21) is of a hollow structure, and the cross section of the front longitudinal beam rear section outer beam (21) is in a shape of Chinese character ri; and the bottom of the front longitudinal beam rear section outer beam (21) is provided with an installation clamping groove.
5. The automobile front side rail assembly according to claim 1, characterized in that the front side rail rear section inner reinforcing beam (22) is formed by extrusion molding of 6082T 6 aluminum alloy material; the front longitudinal beam rear section inner reinforcing beam (22) is of a hollow structure, and the cross section of the front longitudinal beam rear section inner reinforcing beam (22) is "
And (4) type.
6. An automobile chassis structure, comprising an automobile front longitudinal beam assembly (10), a front protecting cross beam assembly (20), a front cabin rear cross beam assembly (30) and a threshold beam assembly (40), wherein the automobile front longitudinal beam assembly (10) is the automobile front longitudinal beam assembly of any one of the claims 1 to 5; the automobile front longitudinal beam assembly is symmetrically connected to two ends of the front protective beam assembly (20), one end of the automobile front longitudinal beam assembly (10) is fixedly connected with the front protective beam assembly (20) through a front longitudinal beam front section (1), the other end of the automobile front longitudinal beam assembly (10) is fixedly connected with the front cabin rear beam assembly (30) through a front longitudinal beam rear section, and a stretch bending part of the lower part (2) of the front longitudinal beam rear section is directly and fixedly connected with the front cabin rear beam assembly (30); the front cabin rear cross beam assembly (30) is also fixedly connected with the threshold beam assembly (40); the front cabin rear cross beam assembly (30) and the automobile front longitudinal beam assembly (10) are perpendicular to each other in direction.
7. An electric vehicle comprising a vehicle chassis structure, characterized in that the vehicle chassis structure is the vehicle chassis structure according to claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010361554.XA CN111605616B (en) | 2020-04-30 | 2020-04-30 | Automobile front longitudinal beam assembly, automobile chassis structure and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010361554.XA CN111605616B (en) | 2020-04-30 | 2020-04-30 | Automobile front longitudinal beam assembly, automobile chassis structure and electric automobile |
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| CN111605616A CN111605616A (en) | 2020-09-01 |
| CN111605616B true CN111605616B (en) | 2022-07-12 |
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| CN202010361554.XA Active CN111605616B (en) | 2020-04-30 | 2020-04-30 | Automobile front longitudinal beam assembly, automobile chassis structure and electric automobile |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112896323B (en) * | 2021-02-05 | 2022-06-21 | 奇瑞新能源汽车股份有限公司 | Cage-shaped framework structure of vehicle body |
| CN113942575B (en) * | 2021-11-22 | 2022-11-04 | 岚图汽车科技有限公司 | Rear longitudinal beam structure of automobile |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7287788B2 (en) * | 2005-06-08 | 2007-10-30 | Ford Global Technologies, Llc | Single component automotive bumper and lower frame rail |
| CN202641858U (en) * | 2012-05-30 | 2013-01-02 | 上海同捷科技股份有限公司 | Strengthening structure of longitudinal beam for automobile |
| CN103448834B (en) * | 2013-08-16 | 2018-08-03 | 浙江吉利汽车研究院有限公司 | Auto parts connection structure and attaching method thereof |
| CN103786791A (en) * | 2014-01-22 | 2014-05-14 | 奇瑞汽车股份有限公司 | Integrated car front longitudinal beam |
| CN207550297U (en) * | 2017-11-27 | 2018-06-29 | 苏州紫荆清远新能源汽车技术有限公司 | A kind of front longitudinal beam |
| CN209888929U (en) * | 2018-12-26 | 2020-01-03 | 青岛吉青工业设计有限公司 | Aluminum alloy frame car front longitudinal beam structure |
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