Fully-extruded aluminum alloy auxiliary frame adopting hydraulic forming technology
Designing a fully extruded aluminum alloy subframe through hydraulic forming technology solves the problem of difficulty in making complex curved surfaces and arcs in the existing technology, achieving the improvement of high mechanical properties and metallographic structure, meeting the needs of new energy vehicles.
Patent Information
- Application Number
- CN202420490659.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-14
AI Technical Summary
The existing all-aluminum alloy subframe is difficult to make complex curved and curved designs, and has a simple structure, making it difficult to meet the needs of the new energy vehicle industry for mechanical properties and metallographic structure.
The fully extruded aluminum alloy subframe is designed using hydraulic forming technology, and the 'Ni'-shaped frame structure and aluminum extruded profiles are used to connect parts through welding processes and aging is carried out to improve mechanical properties.
It realizes complex curved surface and arc design, improves the metallographic structure and mechanical properties of the aluminum alloy subframe, and ensures assembly accuracy and connection stability.
Smart Images
Figure CN222272178U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aluminum alloy subframes for automobile chassis suspension systems, and particularly relates to a fully extruded aluminum alloy subframe adopting a hydroforming technology. Background Art
[0002] Recently, due to the rapid development of the new energy vehicle industry, the demand for fully aluminum alloy subframes has become increasingly strong. At present, fully aluminum alloy subframes are mainly divided into three categories: integral casting, full extrusion, and a combination of casting and extrusion.
[0003] Extruded aluminum alloy profiles have the advantages of good mechanical properties, high strength, few defects, low die cost, easy maintenance, etc., but there are also the following technical defects: simple structure, difficult to manufacture complex curved surfaces, etc.
[0004] Therefore, how to design a fully extruded aluminum alloy subframe adopting a hydroforming technology, which can complete a certain curved surface and arc design and has good metallographic structure and mechanical properties, has become an urgent problem to be solved. Summary of the Utility Model
[0005] Aiming at the problems existing in the prior art, the utility model provides a fully extruded aluminum alloy subframe adopting a hydroforming technology to solve at least one of the above technical problems.
[0006] The technical solution of the utility model is: a fully extruded aluminum alloy subframe adopting a hydroforming technology, including a subframe body. All components of the subframe body are made of aluminum extruded profiles. The subframe body is in a "day"-shaped frame structure. The cross beams of the "day"-shaped frame structure are, from front to back, a front cross beam, a middle cross beam, and a rear cross beam. The two longitudinal beams of the "day"-shaped frame structure are symmetrically arranged. One end of any longitudinal beam is connected to the bottom of the front cross beam, and the other end of the longitudinal beam is connected to the rear cross beam. The bottom surface of the middle part of the longitudinal beam is lower than the bottom surfaces at both ends, the bottom surface of the end of the longitudinal beam connected to the front cross beam is lower than the bottom surface of the other end, and an extruded arc is provided at the other end of the longitudinal beam. The outer arc surfaces of the arcs are all close to the other longitudinal beam; a front swing arm mounting bracket is provided in the middle of the longitudinal beam. The upper part of the front swing arm mounting bracket is in a "7"-shaped structure, and the horizontal plate of the "7"-shaped structure faces away from the middle cross beam.
[0007] The subframe of the utility model adopts a "day"-shaped frame structure design; all components of the subframe are made of aluminum extruded profiles, which can complete a certain curved surface and arc design and have good metallographic structure and mechanical properties; all aluminum alloy components are connected by welding technology, and after welding, the assembly machining surfaces and mounting holes are completed to ensure the assembly accuracy; after the subframe is completed with assembly welding, aging treatment is carried out, which can greatly improve the mechanical properties of the subframe; the subframe is a two-wheel drive subframe. Description of the Drawings
[0008] Figure 1 It is a three-dimensional diagram of the installation structure of the utility model.
[0009] Figure 2 It is a top view of the utility model.
[0010] Figure 3 It is a bottom view of the utility model.
[0011] Figure 4 It is a rear view of the utility model.
[0012] Figure 5 It is a left view of the utility model.
[0013] Figure 6 It is a structural schematic diagram of the longitudinal beam blank and the longitudinal beam of the utility model.
[0014] In the figure: 1. Body mounting point; 2. Steering gear mounting point; 3. Swing arm mounting point; 4. Stabilizer bar mounting point; 5. Front swing arm mounting bracket; 6. Longitudinal beam; 7. Front cross beam; 8. Middle cross beam; 9. Rear cross beam; 10. Rear swing arm mounting bracket; 11. Longitudinal beam blank. DETAILED DESCRIPTION
[0015] The utility model is further described below in conjunction with the accompanying drawings.
[0016] See also Figure 1-6 The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.
[0017] Embodiment 1: A fully extruded aluminum alloy subframe using hydraulic forming technology, referring to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6, including a subframe body, all components of the subframe body are made of aluminum extruded profiles. The subframe body is in a "day"-shaped frame structure. The cross beams of the "day"-shaped frame structure are the front cross beam 7, the middle cross beam 8, and the rear cross beam 9 in sequence from front to back. There are 1 - 3 reinforcing ribs in each of the front cross beam 7, the middle cross beam 8, and the rear cross beam 9, which increases the stiffness and strength of the product. The two longitudinal beams 6 of the "day"-shaped frame structure are symmetrically arranged. One end of any longitudinal beam 6 is connected to the bottom of the front cross beam 7, and the other end of the longitudinal beam 6 is connected to the rear cross beam 9. The bottom surface of the middle part of the longitudinal beam 6 is lower than the bottom surfaces at both ends. The bottom surface of the end of the longitudinal beam 6 connected to the front cross beam 7 is lower than the other end. An extruded arc is provided at the other end of the longitudinal beam 6, and the outer arc surfaces of the arcs are all close to the other longitudinal beam 6. A front swing arm mounting bracket 5 is provided in the middle of the longitudinal beam 6. The upper part of the front swing arm mounting bracket 5 is in a "7"-shaped structure, and the horizontal plate of the "7"-shaped structure faces away from the middle cross beam 8. The subframe of the present utility model adopts a "day"-shaped frame structure design; all components of the subframe are made of aluminum extruded profiles, and certain curved surfaces and arcs are completed in design, having good metallographic structure and mechanical properties; all aluminum alloy components are connected by welding process, and after welding, the assembly machining surfaces and mounting hole positions are processed to ensure the assembly accuracy; after the subframe is completed with assembly welding, aging treatment is carried out, which can greatly improve the mechanical properties of the subframe; the subframe is a two-wheel drive subframe.
[0018] Embodiment 2: On the basis of Embodiment 1, the front cross beam 7 is in an isosceles trapezoid structure. The upper base of the isosceles trapezoid structure is located on the side close to the middle cross beam 8, and both ends of the front cross beam 7 expose the longitudinal beam 6. The present utility model adopts that both ends of the front cross beam expose the longitudinal beam, and the parts of both ends of the front cross beam exposing the longitudinal beam are connected to the vehicle body, ensuring the stability and reliability of the connection.
[0019] Embodiment 3: On the basis of Embodiment 2, referring to Figure 2 , a stabilizer bar mounting point 4 and a steering gear mounting point 2 are sequentially arranged between one end of the longitudinal beam 6 connected to the front cross beam 7 and the front swing arm mounting bracket 5. The present utility model adopts the stabilizer bar mounting point to mount the stabilizer bar and the steering gear mounting point to mount the steering gear, ensuring the stability and reliability of the connection.
[0020] Embodiment 4: On the basis of Embodiment 3, the steering gear mounting point 2 is on the side close to the middle cross beam 8, and the steering gear mounting point 2 is a first round tube arranged at intervals. The first round tube penetrates through the top surface and the bottom surface of the longitudinal beam 6. The present utility model adopts the first round tube arranged at intervals to penetrate through the top surface and the bottom surface of the longitudinal beam. The first round tube exposes the top surface and the bottom surface of the longitudinal beam and can be used for the installation of the steering gear.
[0021] Embodiment 5: Based on Embodiment 4, the stabilizer bar installation point 4 is far away from one side of the middle cross beam 8, and the stabilizer bar installation point 4 is a fifth round tube arranged at intervals, the fifth round tube is located on the bottom surface of the longitudinal beam 6, and the inner hole of the fifth round tube passes through the top surface of the longitudinal beam 6. The utility model adopts the fifth round tube exposed on the bottom surface of the longitudinal beam, and the inner hole of the fifth round tube passes through the top surface of the longitudinal beam, which can be used for the installation of the stabilizer bar.
[0022] Embodiment 6: Based on Embodiment 4, a second round tube is provided at one end of the front cross beam 7 exposed from the longitudinal beam 6, and the second round tube penetrates the top and bottom surfaces of the front cross beam 7. The utility model adopts a second round tube to penetrate the top and bottom surfaces of the front cross beam, the second round tube is exposed from the top surface of the front cross beam, and the vehicle body is connected through the second round tube, thereby ensuring the stability and reliability of the connection.
[0023] Embodiment 7: Based on Embodiment 6, the other end of the longitudinal beam 6 is provided with a rear swing arm mounting bracket 10 at the portion exposed from the rear cross beam 9. The rear swing arm mounting bracket 10 is a first U-shaped bracket, the opening of the first U-shaped bracket faces the side away from the rear cross beam 9, and a third round tube is provided on the rear swing arm mounting bracket 10. The third round tube penetrates the top and bottom surfaces of the longitudinal beam 6. The utility model adopts a third round tube to penetrate the top and bottom surfaces of the longitudinal beam, and connects the vehicle body through the third round tube, thereby ensuring the stability and reliability of the connection.
[0024] Embodiment 8: Based on Embodiment 7, a fourth round tube is provided on the horizontal plate of the "7"-shaped structure, and the second round tube, the third round tube, and the fourth round tube constitute the vehicle body mounting point 1. The second round tube, the third round tube, and the fourth round tube of the subframe of the utility model are connected to the vehicle body by a 6-point mounting connection, which ensures the stability and reliability of the connection.
[0025] Embodiment 9: Based on Embodiment 7, the lower part of the front swing arm mounting bracket 5 is a second U-shaped bracket, and the opening of the second U-shaped bracket faces the side away from the middle cross beam 8; the front swing arm mounting bracket 5 and the rear swing arm mounting bracket 10 form a swing arm mounting point 3. The swing arm mounting point of the utility model adopts a first U-shaped bracket and a second U-shaped bracket, and provides a mounting clamping surface by machining the ear-type profile to ensure the stability and reliability of the connection.
[0026] Embodiment 10: Based on Embodiment 9, the longitudinal beam 6 is extruded from a longitudinal beam blank 11 by using a hydraulic forming technology. The square tube section of the longitudinal beam blank 11 is 110 mm×40 mm, and the fillet is R15 mm. The left and right longitudinal beams of the subframe of the utility model are made of extruded aluminum alloy profiles and adopt a hydraulic forming technology. The longitudinal beams are designed with a certain curved surface and curvature, while ensuring the mechanical properties of the longitudinal beams.
[0027] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A fully extruded aluminum alloy subframe using a hydraulic forming technology, comprising a subframe body, characterized in that: All components of the subframe body are made of aluminum extruded profiles. The subframe body is in a "day"-shaped frame structure. The cross beams of the "day"-shaped frame structure are, from front to back, the front cross beam (7), the middle cross beam (8), and the rear cross beam (9). The two longitudinal beams (6) of the "day"-shaped frame structure are symmetrically arranged. One end of any longitudinal beam (6) is connected to the bottom of the front cross beam (7), and the other end of the longitudinal beam (6) is connected to the rear cross beam (9). The bottom surface of the middle part of the longitudinal beam (6) is lower than the bottom surfaces at both ends. The bottom surface of the end of the longitudinal beam (6) connected to the front cross beam (7) is lower than the bottom surface of the other end. An extruded arc is provided at the other end of the longitudinal beam (6), and the outer arc surfaces of the arcs are all close to the other longitudinal beam (6). A front swing arm mounting bracket (5) is provided in the middle of the longitudinal beam (6). The upper part of the front swing arm mounting bracket (5) is in a "7"-shaped structure, and the horizontal plate of the "7"-shaped structure faces away from the middle cross beam (8).
2. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 1, characterized in that: The front cross beam (7) is in an isosceles trapezoid structure. The upper base of the isosceles trapezoid structure is on the side close to the middle cross beam (8). Both ends of the front cross beam (7) protrude from the longitudinal beam (6).
3. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 2, characterized in that: A stabilizer bar mounting point (4) and a steering gear mounting point (2) are sequentially arranged between one end of the longitudinal beam (6) connected to the front cross beam (7) and the front swing arm mounting bracket (5).
4. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 3, characterized in that: The steering gear mounting point (2) is on the side close to the middle cross beam (8). The steering gear mounting point (2) is a first round tube arranged at intervals, and the first round tube penetrates through the top and bottom surfaces of the longitudinal beam (6).
5. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 4, characterized in that: The stabilizer bar mounting point (4) is on the side away from the middle cross beam (8). The stabilizer bar mounting point (4) is a fifth round tube arranged at intervals. The fifth round tube is located on the bottom surface of the longitudinal beam (6), and the inner hole of the fifth round tube penetrates through the top surface of the longitudinal beam (6).
6. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 4, characterized in that: A second round tube is provided at one end of the front cross beam (7) protruding from the longitudinal beam (6), and the second round tube penetrates through the top and bottom surfaces of the front cross beam (7).
7. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 6, characterized in that: A part of the other end of the longitudinal beam (6) protruding from the rear cross beam (9) is provided with a rear swing arm mounting bracket (10). The rear swing arm mounting bracket (10) is a first U-shaped bracket. The opening of the first U-shaped bracket faces away from the rear cross beam (9). A third round tube is provided on the rear swing arm mounting bracket (10), and the third round tube penetrates through the top and bottom surfaces of the longitudinal beam (6).
8. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 7, characterized in that: A fourth round tube is provided on the horizontal plate of the "7"-shaped structure. The second round tube, the third round tube, and the fourth round tube form a body mounting point (1).
9. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 7, characterized in that: The lower part of the front swing arm mounting bracket (5) is a second U-shaped bracket. The opening of the second U-shaped bracket faces away from the middle cross beam (8). The front swing arm mounting bracket (5) and the rear swing arm mounting bracket (10) form a swing arm mounting point (3).
10. The fully extruded aluminum alloy subframe using hydroforming technology according to claim 9, characterized in that: The longitudinal beam (6) is extruded from a longitudinal beam blank (11) by hydroforming technology.