CN219134297U

CN219134297U - Aluminum alloy rear auxiliary frame with double arch structures

Info

Publication number: CN219134297U
Application number: CN202223218634.3U
Authority: CN
Inventors: 罗世兵; 王立忠; 王潘业; 徐辉; 王海峰; 糜罕峰; 李文通
Original assignee: Changchun Yousheng Automobile Technology Co ltd
Current assignee: Changchun Yousheng Automobile Technology Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-06-06
Anticipated expiration: 2032-12-02

Abstract

The utility model provides an aluminum alloy rear auxiliary frame with a double arch structure, which comprises symmetrically arranged mounting seats, wherein a rear cross beam, a middle cross beam and a front cross beam are sequentially arranged between the two mounting seats from back to front, any mounting seat is an arch-shaped beam, and the two arch-shaped beams are welded with the rear cross beam, the middle cross beam and the front cross beam through CMT respectively to form a double arch structure; any arched beam is C type structure, and C type structure's opening is kept away from one side of middle crossbeam, and C type structure's closed end is provided with L type stabilizer blade towards one side of middle crossbeam, and the contained angle of L type stabilizer blade is the obtuse angle. The rear cross beam, the middle cross beam and the front cross beam are respectively welded with the two mounting seats to form a double-arch structure, so that the requirements of the strength, the mode and the rigidity of the whole vehicle can be met; the structure design is obviously simplified, the complex structure is simplified, the manufacturing process is simplified, the efficiency is improved, and the cost is reduced.

Description

Aluminum alloy rear auxiliary frame with double arch structures

Technical Field

The utility model relates to the technical field of machinery, in particular to an aluminum alloy rear auxiliary frame with a double-arch structure.

Background

The auxiliary frame is a framework of the front and rear axles and is an important component part of the front and rear axles, and the auxiliary frame has the functions of supporting chassis parts, improving the vibration and noise of a barrier road surface and improving the connection rigidity of a suspension. The auxiliary frame is taken as an indispensable part of an automobile chassis part, and carries very complex load and fatigue failure problems under the working conditions of braking, vertical impact, steering, reversing, accelerating and the like of an automobile. At present, the application of aluminum alloy to the auxiliary frame is more and more common, because the weight reduction effect of the aluminum alloy auxiliary frame is remarkable and better than that of the steel auxiliary frame.

The aluminum alloy auxiliary frame is an important way for realizing the light weight of the new energy automobile by reducing the weight of the automobile, and the new energy automobile becomes a main force army for energy conservation and emission reduction.

The prior aluminum alloy rear auxiliary frame has the following technical defects: the structure is more complicated, and the atress condition is changeable, and SUV motorcycle type is higher to the requirement of back auxiliary vehicle, and the back auxiliary frame is mostly integrative low pressure casting shaping in the trade, and efficiency is lower, the cost is very high.

Therefore, how to design the aluminum alloy rear auxiliary frame which meets the complex working condition and high bearing load, and meets the process efficiency and cost and the weight reduction effect of the automobile becomes a problem to be solved urgently.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides an aluminum alloy rear auxiliary frame with a double-arch structure, so as to solve at least one technical problem.

The technical scheme of the utility model is as follows: the aluminum alloy rear auxiliary frame with the double arch structure comprises mounting seats which are symmetrically arranged, wherein a rear cross beam, a middle cross beam and a front cross beam are sequentially arranged between the two mounting seats from back to front, any one mounting seat is an arch beam, and the two arch beams are welded with the rear cross beam, the middle cross beam and the front cross beam through CMT respectively to form a double arch structure; any arched beam is C type structure, and C type structure's opening is kept away from one side of middle crossbeam, and C type structure's closed end is provided with L type stabilizer blade towards one side of middle crossbeam, and the contained angle of L type stabilizer blade is the obtuse angle.

The rear cross beam, the middle cross beam and the front cross beam are respectively welded with the two mounting seats to form a double-arch structure, the rear auxiliary frame of the double-arch structure is structurally designed by adopting the arch structure principle of a bridge, and the results show that the aluminum alloy rear auxiliary frame of the double-arch structure can meet the requirements of the whole vehicle on strength, mode and rigidity by establishing a three-dimensional finite element model and applying an elastoplasticity and geometric nonlinear calculation method; the structure design is obviously simplified, the complex structure is simplified, the manufacturing process is simplified, the efficiency is improved, and the cost is reduced.

Preferably, any one of the connection positions of the mounting seat, the rear cross beam, the middle cross beam and the front cross beam are provided with insertion openings, and two ends of the front cross beam, two ends of the middle cross beam and two ends of the rear cross beam are respectively inserted into the corresponding insertion openings and then welded.

According to the utility model, the two ends of the front cross beam, the two ends of the middle cross beam and the two ends of the rear cross beam are inserted into the insertion opening of the mounting seat, so that a closed-loop welding seam can be formed around the insertion opening, the welding strength is effectively improved, and the stress concentration is avoided.

The utility model has the beneficial effects that:

1) The plug-in structure among all the sectional materials of the auxiliary frame ensures the strength and the safety of the whole auxiliary frame; the original butt joint structure is changed into a crossed and inserted structure, so that the strength is increased and the welding beads are staggered;

2) The CMT welding technology reduces the deformation generated by aluminum alloy welding;

3) Zero clearance fit between the individual parts reduces weld induced shrinkage;

4) The assembly is integrally machined to ensure high precision of the mounting holes.

Drawings

Fig. 1 is a three-dimensional view of a mounting structure of the present utility model.

Fig. 2 is a bottom view of the present utility model.

Fig. 3 is a three-dimensional view of the left mount of the present utility model.

Fig. 4 is a schematic cross-sectional view of the rear cross-member of the present utility model.

Fig. 5 is a schematic cross-sectional view of a middle cross-beam of the present utility model.

Fig. 6 is a schematic cross-sectional view of a front cross-member of the present utility model.

In the figure: 1. a left mounting seat; 2. a rear cross member; 3. a middle cross beam; 4. a flat head riveting nut; 5. a right mounting seat; 6. a front cross member; 7. a front suspension sleeve; 8. an upper swing arm mounting plate; 9. and a lower swing arm mounting plate.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1-6, the structures, proportions, sizes, etc. shown in the drawings attached hereto are shown only in order to provide a person skilled in the art with the benefit of the present disclosure, and are not intended to limit the scope of the utility model which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the objects achieved by the present utility model, are deemed to fall within the ambit of the technical disclosure. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

An aluminum alloy rear subframe with a double arch structure, referring to fig. 1 and 2, comprises symmetrically arranged mounting seats, wherein a rear cross beam 2, a middle cross beam 3 and a front cross beam 6 are sequentially arranged between the two mounting seats from back to front, any one mounting seat is an arch beam, and the two arch beams are welded with the rear cross beam 2, the middle cross beam 3 and the front cross beam 6 respectively through CMT to form a double arch structure; any arched beam is of a C-shaped structure, an opening of the C-shaped structure faces to one side far away from the middle cross beam 3, an L-shaped supporting leg is arranged at one side, facing to the middle cross beam 3, of a closed end of the C-shaped structure, and an included angle of the L-shaped supporting leg is an obtuse angle; the arched beam is die-cast, so that the difficulty of extrusion molding is overcome, and the high strength and the high hardness of the product are further ensured. The rear cross beam, the middle cross beam and the front cross beam are respectively welded with the two mounting seats to form a double-arch structure, the rear auxiliary frame of the double-arch structure is structurally designed by adopting the arch structure principle of a bridge, and the results show that the aluminum alloy rear auxiliary frame of the double-arch structure can meet the requirements of the whole vehicle on strength, mode and rigidity by establishing a three-dimensional finite element model and applying an elastoplasticity and geometric nonlinear calculation method; the structure design is obviously simplified, the complex structure is simplified, the manufacturing process is simplified, the efficiency is improved, and the cost is reduced.

In the second embodiment, on the basis of the first embodiment, two mounting seats respectively correspond to the left mounting seat 1 and the right mounting seat 5, any one of the mounting seats is of a hollow casting structure, and weight reducing holes are formed in the top surface, the bottom surface and the side surfaces of any one of the mounting seats. The casting material of the mounting seat is A356, and has good mechanical property and welding weldability, the tensile strength is more than 280MPa, the yield strength is more than 220MPa, and the elongation is more than 7%.

On the basis of the third embodiment, through holes which are symmetrically arranged are formed in the vertical face of the front cross beam 6, front suspension sleeves 7 are arranged in the through holes, and the front suspension sleeves 7 are connected with the front cross beam 6 through CMT welding. The front suspension sleeve is inserted into the through hole and then is connected with the two side surfaces of the front cross beam through welding, so that the effect of increasing the strength is achieved.

In the fourth embodiment, on the basis of the third embodiment, the rear cross beam 2, the middle cross beam 3, the front cross beam 6 and the front suspension sleeve 7 are all hollow aluminum alloy section structures. The hollow aluminum alloy profile structure is adopted, so that the weight reduction effect is achieved; the hollow aluminum alloy section adopts high-strength aluminum alloy 6082, the tensile strength is more than 310MPa, the yield strength is more than 280MPa, and the elongation is more than 10%.

In the fifth embodiment, on the basis of the fourth embodiment, the connection parts of any one of the mounting seats and the rear beam 2, the middle beam 3 and the front beam 6 are provided with insertion openings, and two ends of the front beam 6, two ends of the middle beam 3 and two ends of the rear beam 2 are respectively inserted into the corresponding insertion openings and then welded. According to the utility model, the two ends of the front cross beam, the two ends of the middle cross beam and the two ends of the rear cross beam are inserted into the insertion opening of the mounting seat, so that a closed-loop welding seam can be formed around the insertion opening, the welding strength is effectively improved, and the stress concentration is avoided.

On the basis of the fourth embodiment, referring to fig. 3, bushing mounting holes, stabilizer bar mounting holes, an upper swing arm mounting plate 8 and a lower swing arm mounting plate 9 are symmetrically arranged on the two mounting seats; the upper swing arm mounting plate 8 and the lower swing arm mounting plate 9 comprise lug plates which are arranged in parallel, and swing arm assembly holes are formed in the lug plates; the rear cross beam 2 is also provided with a plurality of flat head riveting nuts 4, and the specification of the flat head riveting nuts 4 is M6.

In the seventh embodiment, referring to fig. 4, the cross section of the rear beam 2 includes a U-shaped frame body at the lower part and a splayed frame at the middle part, and the splayed frame is spliced into a special-shaped hollow frame body by a sealing plate on the top surface. The utility model adopts the rear cross beam of the special-shaped hollow frame body, and the special-shaped hollow frame body is welded to form a closed-loop welding seam after being inserted into the inserting opening of the mounting seat, thereby strengthening the double-arch structure.

In the eighth embodiment, based on the fourth embodiment, referring to fig. 5, the cross section of the middle beam 3 is in a "mouth" shape structure, and a first inclined plane is disposed at a corner of the top surface of the "mouth" shape structure. The utility model adopts the middle cross beam with the 'mouth' -shaped structure, and the 'mouth' -shaped structure is welded to form a closed-loop welding seam after being inserted into the inserting opening of the mounting seat, thereby strengthening the double-arch structure.

In a ninth embodiment, on the basis of the fourth embodiment, referring to fig. 6, a cross section of the front beam 6 includes a vertically arranged rectangular frame, where a corner of a top surface of the rectangular frame is provided with a second inclined plane. The utility model adopts the front cross beam of the rectangular frame body, and the rectangular frame body is welded to form a closed-loop welding seam after being inserted into the inserting opening of the mounting seat, thereby strengthening the double-arch structure.

During concrete implementation, CNC processing is carried out on the welded rear auxiliary frame, the heat input in the welding process can lead to slight dimensional deformation of the product, so that holes to be processed and faces to be processed are not processed before welding, CNC processing is carried out on the whole body after welding, and high precision of mounting holes and mounting surfaces is guaranteed.

The utility model has the advantages of light weight, simple structure, uniform wall thickness distribution, high stability, easy realization of process and meeting the requirements of rigidity and mode. The double-arch structure can meet the assembly requirements of various SUV vehicle types.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. The utility model provides an auxiliary frame behind aluminum alloy of two arch structures, includes the mount pad that the symmetry was provided with, its characterized in that: a rear cross beam (2), a middle cross beam (3) and a front cross beam (6) are sequentially arranged between the two mounting seats from back to front, any one mounting seat is an arched beam, and the two arched beams are welded with the rear cross beam (2), the middle cross beam (3) and the front cross beam (6) through CMT to form a double-arch structure; any arched beam is C type structure, and the opening of C type structure is kept away from one side of middle crossbeam (3), and the closed end of C type structure is provided with L type stabilizer blade towards one side of middle crossbeam (3), and the contained angle of L type stabilizer blade is the obtuse angle.

2. The aluminum alloy rear subframe of claim 1 wherein: the two mounting seats respectively correspond to the left mounting seat (1) and the right mounting seat (5), any one of the mounting seats is of a hollow casting structure, and the top surface, the bottom surface and the side surface of any one of the mounting seats are provided with lightening holes.

3. The aluminum alloy rear subframe of claim 2 wherein: the front cross beam (6) is characterized in that symmetrically arranged through holes are formed in the vertical face of the front cross beam (6), front suspension sleeves (7) are arranged in the through holes, and the front suspension sleeves (7) are connected with the front cross beam (6) through CMT welding.

4. A double arch aluminum alloy rear subframe as recited in claim 3, wherein: the rear cross beam (2), the middle cross beam (3), the front cross beam (6) and the front suspension sleeve (7) are hollow aluminum alloy section structures.

5. The aluminum alloy rear subframe of claim 4 wherein: any one of the mounting seats is provided with an inserting opening at the joint of the rear cross beam (2), the middle cross beam (3) and the front cross beam (6), and the two ends of the front cross beam (6), the two ends of the middle cross beam (3) and the two ends of the rear cross beam (2) are respectively inserted into the corresponding inserting openings and then welded.

6. The aluminum alloy rear subframe of claim 4 wherein: the two mounting seats are symmetrically provided with bushing mounting holes, stabilizer bar mounting holes, an upper swing arm mounting plate (8) and a lower swing arm mounting plate (9); the upper swing arm mounting plate (8) and the lower swing arm mounting plate (9) comprise lug plates which are arranged in parallel, and swing arm assembly holes are formed in the lug plates.

7. The aluminum alloy rear subframe of claim 4 wherein: the cross section of the rear cross beam (2) comprises a U-shaped frame body at the lower part and a splayed frame at the middle part, and the splayed frame is spliced into a special-shaped hollow frame body through a sealing plate on the top surface.

8. The aluminum alloy rear subframe of claim 4 wherein: the cross section of the middle cross beam (3) is of a 'mouth' -shaped structure, and one corner of the top surface of the 'mouth' -shaped structure is provided with a first inclined surface.

9. The aluminum alloy rear subframe of claim 4 wherein: the cross section of the front cross beam (6) comprises a vertically arranged rectangular frame body, wherein one corner of the top surface of the rectangular frame body is provided with a second inclined plane.