A low pressure cast aluminum alloy subframe

Abstract

The utility model provides a kind of low-pressure casting aluminum alloy auxiliary frame, including parallelly arranged crossbeam, two the crossbeam and two longitudinal beams constitute the structure of '' mouth '' character, and the structure of '' mouth '' character is integrated low-pressure sand core casting;Any one crossbeam is provided with vehicle body mounting point beyond the end of longitudinal beam, four vehicle body mounting points are symmetrically arranged, and four vehicle body mounting points are connected with vehicle body by first press-fit bush respectively;The structure of '' mouth '' character has internal cavity, and basic wall thickness is 4mm.The utility model is made of A356 aluminum alloy material, and auxiliary frame and vehicle body are assembled by four points, and are connected with vehicle body by first press-fit bush;Integrated low-pressure sand core casting internal cavity, basic wall thickness is 4mm, and weight is reduced to the maximum;After integrated casting, machining is uniformly processed mounting surface and mounting hole;Casting integrated structure does not need welding, without welding deformation, and it is beneficial to overall size control.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy subframes, and particularly relates to a low-pressure casting aluminum alloy subframe. Background Art

[0002] In recent years, the demand for vehicle lightweighting has been increasing. Due to its high specific strength, aluminum alloy has been widely used in various structural components of vehicles. Especially in the field of chassis subframes, the application of aluminum alloy is increasing. Welded frames have the following technical defects: they are prone to welding deformation, which is not conducive to overall dimension control.

[0003] Therefore, how to design a low-pressure casting aluminum alloy subframe has become an urgent problem to be solved. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a low-pressure casting aluminum alloy subframe to solve at least one of the above technical problems.

[0005] The technical solution of the utility model is: a low-pressure casting aluminum alloy subframe includes crossbeams arranged in parallel. The two crossbeams and two longitudinal beams form a "mouth" - shaped structure, and the "mouth" - shaped structure is integrally formed by low-pressure sand core casting. One end of any crossbeam that extends beyond the longitudinal beam is provided with a vehicle body mounting point, and the four vehicle body mounting points are arranged symmetrically in pairs. The four vehicle body mounting points are respectively connected to the vehicle body through the first press - fit bushings. The "mouth" - shaped structure has an internal cavity with a basic wall thickness of 4 mm.

[0006] The utility model uses A356 aluminum alloy material. The subframe and the vehicle body are assembled at four points and connected to the vehicle body through the first press - fit bushings. The internal cavity of the integrally formed low-pressure sand core casting has a basic wall thickness of 4 mm, which minimizes the weight to the greatest extent. After integral casting, the mounting surface and mounting holes are machined uniformly. The integrally cast structure does not require welding and has no welding deformation, which is conducive to overall dimension control. Brief Description of the Drawings

[0007] Figure 1 is the top view of the utility model.

[0008] Figure 2 is the bottom view of the utility model.

[0009] Figure 3 is the left view of the utility model.

[0010] Figure 4 is the rear view of the utility model.

[0011] Figure 5 is for Figure 1 the A - A sectional view of

[0012] Figure 6 is Figure 1 the B-B sectional view of

[0013] In the figure: 1. Front crossbeam; 2. Longitudinal beam; 3. Body mounting point; 4. Stabilizer bar mounting point; 5. Rear mount mounting point; 6. Rear upper arm mounting point; 7. Rear guide arm mounting point; 8. Front mount mounting point; 9. Rear traction arm mounting point; 10. Rear lower arm mounting point; 11. First weight reduction hole; 12. Second press-fit bushing; 13. Steering gear mounting point; 14. Second weight reduction hole; 15. First hollow structure; 16. Second hollow structure. Specific embodiments

[0014] The following further describes the present utility model in conjunction with the accompanying drawings.

[0015] Refer to Figure 1-6 The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0016] Example 1. A low-pressure casting aluminum alloy subframe, referring to Figure 1 , including crossbeams arranged in parallel. The two crossbeams and two longitudinal beams 2 form a "mouth" - shaped structure, and the "mouth" - shaped structure is integrally formed by low - pressure sand core casting; one end of any crossbeam extending beyond the longitudinal beam 2 is provided with a body mounting point 3, and the four body mounting points 3 are arranged symmetrically in pairs. The four body mounting points 3 are respectively connected to the body through a first press - fit bushing; the "mouth" - shaped structure has an internal cavity with a basic wall thickness of 4 mm. The present utility model uses A356 aluminum alloy material, and the subframe and the body are assembled at four points and connected to the body through the first press - fit bushing; the internal cavity of the integrally formed low - pressure sand core casting has a basic wall thickness of 4 mm, which minimizes the weight to the greatest extent; after integral casting, the mounting surface and mounting holes are uniformly machined; the integrally cast structure does not require welding and has no welding deformation, which is beneficial to the control of the overall dimensions.

[0017] Example 2. On the basis of Example 1, referring to Figure 4The two crossbeams correspond to the front crossbeam 1 and the rear crossbeam, respectively. Symmetrically arranged second press-fit bushings 12 are provided on the upper part of the crossbeams. Several steering gear mounting points 13 are provided on the end face of the front crossbeam 1 away from the rear crossbeam, and these mounting points 13 are located between the two second press-fit bushings 12. This utility model employs second press-fit bushings on the upper part of the crossbeams, where the second press-fit bushing on the front crossbeam serves as the front suspension mounting point; the second press-fit bushing on the rear crossbeam serves as the rear suspension mounting point, and the motor suspension is connected to the subframe via the second press-fit bushings.

[0018] Example 3: Based on Example 2, a stabilizer mounting point 4 is further provided at the end of the rear crossbeam that extends beyond the longitudinal beam 2. The stabilizer mounting point 4 is a first cast boss, and a first screw hole is machined at the center of the first cast boss to provide the mounting point. This utility model adopts the method of setting a stabilizer mounting point at the end of the rear crossbeam that extends beyond the longitudinal beam, and uniformly machining the mounting surface and the first screw hole, eliminating the need for welding, avoiding welding deformation, and facilitating overall size control.

[0019] Example 4: Based on Example 2, several steering gear mounting points 13 are located within an isosceles trapezoid, with two of the steering gear mounting points 13 located at both ends of the upper base of the isosceles trapezoid, the upper base of the isosceles trapezoid being lower than the centerline of the second press-fit bushing 12; the remaining steering gear mounting points 13 are located on one side of the lower base of the isosceles trapezoid and arranged along the bottom surface of the front crossbeam 1. This utility model uses steering gear mounting points distributed on an isosceles trapezoid, and the steering gear is connected to the subframe through the steering gear mounting points.

[0020] Example 5: Based on Example 4, the steering gear mounting point 13 is a second cast boss, with a second threaded hole machined at the center of the second cast boss to provide the mounting point. This invention uses machining to uniformly process the mounting surface and the second threaded hole, eliminating the need for welding and preventing welding deformation, which facilitates overall dimensional control. The steering gear is connected to the subframe through the second threaded hole.

[0021] Example 6: Based on Example 5, X-shaped reinforcing ribs are provided between the steering gear mounting point 13 on the lower base side of the isosceles trapezoid and the steering gear mounting point 13 on the upper base side of the isosceles trapezoid, as well as between the second press-fit bushing 12. This invention improves the connection strength of the subframe area where the steering gear is located by providing X-shaped reinforcing ribs between the steering gear mounting points and between the steering gear mounting point and the second press-fit bushing.

[0022] Example 7: Based on Example 6, with reference to... Figure 3The longitudinal beam 2 has a first weight-reducing hole 11 in its middle, which is close to the front crossbeam. The crossbeam also has symmetrically arranged second weight-reducing holes 14, each located within an isosceles trapezoid and within the space enclosed by adjacent X-shaped reinforcing ribs. This invention utilizes a first weight-reducing hole in the middle of the longitudinal beam and symmetrically arranged second weight-reducing holes within the isosceles trapezoid formed by the steering gear mounting point. This disperses the stress within the subframe, reduces its weight, and does not affect its load-bearing capacity.

[0023] Example 8: Based on Example 6, with reference to... Figure 2 The top surface of the connection between the rear crossbeam and the longitudinal beam 2 is provided with a rear upper arm mounting point 6, which is a first U-shaped structure; the top surface of the connection between the front crossbeam 1 and the longitudinal beam 2 is provided with a rear guide arm mounting point 7, which is a second U-shaped structure; the bottom surface of the front crossbeam 1 exposed at one end of the longitudinal beam 2 is provided with a rear traction arm mounting point 9, which is a third U-shaped structure; the bottom surface of the longitudinal beam 2 is provided with a rear lower arm mounting point 10, which is a fourth U-shaped structure, and the rear lower arm mounting point 10 is close to the rear crossbeam. This utility model uses U-shaped rear upper arm mounting points, guide arm mounting points, rear traction arm mounting points, and rear lower arm mounting points, and provides mounting and clamping surfaces for the rear upper arm, guide arm, rear traction arm, and rear lower arm through two vertical plates (ear-shaped) of the U-shaped structure.

[0024] Example 9: Based on Example 1, with reference to... Figure 5 , Figure 6 The longitudinal beam 2 contains a first hollow structure 15, the cross-sectional area of ​​which is larger at the end near the front crossbeam 1 than at the end near the rear crossbeam. The crossbeam contains a second hollow structure 16, the cross-sectional area of ​​which is larger at the front crossbeam 1 than at the rear crossbeam. The second hollow structure 16 at the rear crossbeam is located at the upper part of the rear crossbeam. This invention, by incorporating a first hollow structure within the longitudinal beam and a second hollow structure within the crossbeam, achieves weight reduction in the frame structure while meeting the requirements for frame stiffness and strength, thus realizing a lightweight frame design.

[0025] The above-described embodiments are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A low-pressure cast aluminum alloy subframe, comprising parallel crossbeams, characterized in that: The two crossbeams and the two longitudinal beams (2) form a "square" - shaped structure, and the "square" - shaped structure is integrally cast by low - pressure sand core; at one end of any crossbeam that extends beyond the longitudinal beam (2), a vehicle body mounting point (3) is provided. The four vehicle body mounting points (3) are arranged symmetrically in pairs, and the four vehicle body mounting points (3) are respectively connected to the vehicle body through the first press - fit bushings; the "square" - shaped structure has an internal cavity, and the basic wall thickness is 4 mm.

2. The low-pressure cast aluminum alloy subframe according to claim 1, characterized in that: The two crossbeams respectively correspond to the front crossbeam (1) and the rear crossbeam. On the upper part of the crossbeam, symmetrically arranged second press - fit bushings (12) are provided. On the end face of the front crossbeam (1) on the side away from the rear crossbeam, several steering gear mounting points (13) are provided, and the several steering gear mounting points (13) are located between the two second press - fit bushings (12).

3. The low-pressure cast aluminum alloy subframe according to claim 2, characterized in that: At one end of the rear crossbeam that extends beyond the longitudinal beam (2), a stabilizer bar mounting point (4) is further provided. The stabilizer bar mounting point (4) is a first casting boss, and a first screw hole is machined at the center of the first casting boss to provide a mounting point.

4. The low-pressure cast aluminum alloy subframe according to claim 2, characterized in that: The several steering gear mounting points (13) are located within the range of an isosceles trapezoid. Two of the steering gear mounting points (13) are located at both ends of the upper base of the isosceles trapezoid, and the upper base of the isosceles trapezoid is lower than the center line of the second press - fit bushing (12); the remaining steering gear mounting points (13) are all located on one side of the lower base of the isosceles trapezoid and are arranged along the bottom surface of the front crossbeam (1).

5. A low-pressure cast aluminum alloy subframe according to claim 4, characterized in that: The steering gear mounting point (13) is a second casting boss, and a second screw hole is machined at the center of the second casting boss to provide a mounting point.

6. A low-pressure cast aluminum alloy subframe according to claim 5, characterized in that: X - shaped stiffeners are provided between the steering gear mounting points (13) on one side of the lower base of the isosceles trapezoid, the steering gear mounting points (13) on one side of the upper base of the isosceles trapezoid, and the second press - fit bushing (12).

7. A low-pressure cast aluminum alloy subframe according to claim 6, characterized in that: On the crossbeam, symmetrically arranged second weight - reducing holes (14) are also provided. The two second weight - reducing holes (14) are located within the isosceles trapezoid, and each second weight - reducing hole (14) is located within the space surrounded by the adjacent X - shaped stiffeners.

8. A low-pressure cast aluminum alloy subframe according to claim 6, characterized in that: The second press - fit bushing (12) on the front crossbeam (1) is the front suspension mounting point (8); the second press - fit bushing (12) on the rear crossbeam is the rear suspension mounting point (5).

9. A low-pressure cast aluminum alloy subframe according to claim 6, characterized in that: On the top surface of the connection between the rear crossbeam and the longitudinal beam (2), a rear suspension upper arm mounting point (6) is provided. The rear suspension upper arm mounting point (6) is a first U - shaped structure; on the top surface of the connection between the front crossbeam (1) and the longitudinal beam (2), a rear suspension guide arm mounting point (7) is provided. The rear suspension guide arm mounting point (7) is a second U - shaped structure; on the bottom surface of the end of the front crossbeam (1) that extends out of the longitudinal beam (2), a rear suspension traction arm mounting point (9) is provided. The rear suspension traction arm mounting point (9) is a third U - shaped structure; on the bottom surface of the longitudinal beam (2), a rear suspension lower arm mounting point (10) is provided. The rear suspension lower arm mounting point (10) is a fourth U - shaped structure, and the rear suspension lower arm mounting point (10) is close to the rear crossbeam.

10. A low-pressure cast aluminum alloy subframe according to claim 1, characterized in that: The longitudinal beam (2) is provided with a first hollow structure (15), the cross-sectional area of ​​the first hollow structure (15) near the front crossbeam (1) is greater than the cross-sectional area near the rear crossbeam; the crossbeam is provided with a second hollow structure (16), the cross-sectional area of ​​the second hollow structure (16) in the front crossbeam (1) is greater than the cross-sectional area of ​​the second hollow structure (16) in the rear crossbeam, and the second hollow structure (16) in the rear crossbeam is located at the upper part of the rear crossbeam.

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