A multi-directional core-pulling aluminum alloy subframe

Abstract

The present invention belongs to the technical field of subframes, and provides a multi-directional core-pulling aluminum alloy subframe, which includes a main body integrally formed by high-pressure casting. The main body includes two cross beams, two longitudinal beams, a front control arm bracket, and a rear control arm bracket. The longitudinal beams are connected between the cross beams. The cross beams are provided with body mounting holes, and on the body mounting holes, there are front-to-rear core-pulling structures extending towards the longitudinal beams. The front control arm bracket and the rear control arm bracket are connected to the longitudinal beams, and on the longitudinal beam between the front control arm bracket and the rear control arm bracket, there is a lateral core-pulling structure. The advantages of the present invention are that by integrally casting and forming with aluminum alloy, the number of parts is integrated from 11 parts into 1 part, the welding process and assembly process are cancelled, the complexity of product manufacturing is reduced, the weight of the entire subframe is reduced by about 5%, and the modal of each position is improved by using the front-to-rear core-pulling structure and the front core-pulling structure. The modal performance of the entire subframe is improved by about 8%.

Description

Technical Field

[0001] The present invention belongs to the technical field of subframes and relates to a multi-directional core-pulling aluminum alloy subframe. Background Art

[0002] Currently, subframes are mainly divided into steel subframes and aluminum alloy subframes. The manufacturing process of steel subframes is mainly stamping + welding forming. Aluminum alloy subframes are divided into two types: profile + casting or profile + profile welding and integral casting + assembly machining forming. Among them, the weight of steel subframes is heavier than that of aluminum alloy subframes, and it is not very suitable for new energy vehicles with strict weight requirements. Moreover, whether it is a steel subframe or an aluminum alloy subframe, as long as the manufacturing process involves welding technology, due to reasons such as welding deformation and a large number of parts, it is difficult to control the dimensional accuracy of parts, and the dimensional accuracy is low. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-directional core-pulling aluminum alloy subframe in view of the current situation of the prior art. The entire subframe is light in weight, the welding process and assembly process are cancelled, and the complexity of product manufacturing is reduced.

[0004] The technical solution adopted by the present invention to solve the above technical problem is as follows: A multi-directional core-pulling aluminum alloy subframe, characterized in that it includes a main body integrally formed by high-pressure casting. The main body includes two cross beams, two longitudinal beams, a front control arm bracket, and a rear control arm bracket. The longitudinal beams are connected between the cross beams. The cross beams are provided with body mounting holes, and on the body mounting holes, there are front-to-back core-pulling structures extending towards the longitudinal beams. The front control arm bracket and the rear control arm bracket are connected to the longitudinal beams, and on the longitudinal beams between the front control arm bracket and the rear control arm bracket, there is a lateral core-pulling structure.

[0005] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, the two cross beams are respectively a front cross beam and a rear cross beam. A motor mount bracket is connected to the front cross beam. The two longitudinal beams are divided into a left longitudinal beam and a right longitudinal beam. The longitudinal beams are provided with stabilizer bar mounting grooves, and on the stabilizer bar mounting grooves, there are stabilizer bar mounting holes.

[0006] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, both ends of the front cross beam are respectively provided with a first front body mounting hole and a second front body mounting hole. The motor mount bracket on the front cross beam is divided into a first motor mount bracket and a second motor mount bracket. The front cross beam is provided with a frontward core-pulling structure extending towards the longitudinal beam and improving the modal of the front body mounting hole and the motor mount bracket.

[0007] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, the forward core-pulling structure includes a first forward core-pulling structure and a second forward core-pulling structure. The first forward core-pulling structure is a first inner hollow groove extending towards the left longitudinal beam and terminating at the back of the stabilizer bar mounting hole. The second forward core-pulling structure is a second inner hollow groove extending towards the right longitudinal beam and terminating at the back of the stabilizer bar mounting hole. An inner vertical rib connected to the second motor mount bracket is provided in the second inner hollow groove.

[0008] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, both ends of the rear crossbeam are respectively provided with a first rear body mounting hole and a second rear body mounting hole. A first rearward core-pulling structure extending towards the left longitudinal beam is provided beside the first rear body mounting hole. The first rearward core-pulling structure is a first cross groove. A second rearward core-pulling structure extending towards the right longitudinal beam is provided beside the second rear body mounting hole. The first rearward core-pulling structure is a second cross groove.

[0009] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, the left longitudinal beam has a first relief arc, and a first lateral core-pulling structure is provided in the first relief arc. The right longitudinal beam has a second relief arc, and a second lateral core-pulling structure is provided in the second relief arc. The first lateral core-pulling structure and the second lateral core-pulling structure are lateral grooves with an X shape inside.

[0010] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, a first sleeve is embedded in the first rear body mounting hole, and a second sleeve is embedded in the second rear body mounting hole.

[0011] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, continuous reinforcing ribs are provided inside the front crossbeam, rear crossbeam, left longitudinal beam, and right longitudinal beam.

[0012] In the above-mentioned multi-directional core-pulling aluminum alloy subframe, the front control arm frame includes a left front control arm frame and a right front control arm frame. The rear control arm frame includes a left rear control arm frame and a right rear control arm frame. The left front control arm frame and the left rear control arm frame are connected to the left longitudinal beam. The right front control arm frame and the right rear control arm frame are connected to the right longitudinal beam.

[0013] Compared with the prior art, the advantages of the present invention are that the number of parts is integrated from 11 parts into 1 part by integral casting of aluminum alloy, the welding process and assembly process are cancelled, the complexity of product manufacturing is reduced, the weight of the entire subframe is reduced by about 5%, and the modal of each position is improved by using the front and rear core-pulling structures and the forward core-pulling structure. The modal performance of the entire subframe is improved by about 8%. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present multi-directional core-pulling aluminum alloy subframe;

[0015] Figure 2 is Figure 1 Another schematic structural diagram in a different direction. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention.

[0018] In the figure: front cross beam 100; rear cross beam 200; left longitudinal beam 300; right longitudinal beam 400; left front control arm 500; right front control arm 600; left rear control arm 700; right rear control arm 800; stabilizer bar mounting groove 900; stabilizer bar mounting hole 1000; first front body mounting hole 1001; second front body mounting hole 1002; first motor mount bracket 1003; second motor mount bracket 1004; first inner hollow groove 1005; second inner hollow groove 1006; inner vertical rib 1006a; first rear body mounting hole 1007; second rear body mounting hole 1008; first sleeve 1009; second sleeve 1010; first cross groove 1011; second cross groove 1012; first avoidance arc 1013; second avoidance arc 1014; X-shaped lateral groove 1015; continuous reinforcing rib 1016.

[0019] Such as Figure 1 and Figure 2As shown in the figure, this multi-directional core-pulling aluminum alloy subframe includes a main body formed by integral high-pressure casting. The main body is formed by high-pressure casting of aluminum alloy material, so that 11 parts can be integrated into 1 part, reducing the complexity of product manufacturing. Since the welding process and assembly process are eliminated, after the subframe is integrally high-pressure vacuum-cast, it is machined by a five-axis CNC machine, with high overall dimensional accuracy. Therefore, there is no welding deformation and the dimensional accuracy is more stable. And the use of aluminum alloy for the material can reduce the overall weight of the entire subframe by about 5%. The main body includes two cross beams, two longitudinal beams, a front control arm bracket, and a rear control arm bracket. The longitudinal beams are connected between the cross beams. There are body mounting holes on the cross beams. Through the body mounting holes, the entire subframe can be installed and connected to the body. There is a front-to-back core-pulling structure extending towards the longitudinal beam on the body mounting holes. The front control arm bracket and the rear control arm bracket are connected to the longitudinal beams. Control arms can be installed through the control arm brackets. There is a side core-pulling structure on the longitudinal beam between the front control arm bracket and the rear control arm bracket. Here, the front-to-back core-pulling structure and the front core-pulling structure are used to improve the modal of each position, thereby improving the modal performance of the entire subframe.

[0020] Specifically, the two cross beams are the front cross beam 100 and the rear cross beam 200 respectively. A motor mounting bracket is connected to the front cross beam 100. The two longitudinal beams are divided into the left longitudinal beam 300 and the right longitudinal beam 400. Continuous reinforcing ribs 1016 are provided inside the front cross beam 100, the rear cross beam 200, the left longitudinal beam 300 and the right longitudinal beam 400, which can significantly improve the internal strength of the front cross beam 100, the rear cross beam 200, the left longitudinal beam 300 and the right longitudinal beam 400. The front control arm frame includes the left front control arm frame 500 and the right front control arm frame 600. The rear control arm frame includes the left rear control arm frame 700 and the right rear control arm frame 800. The left front control arm frame 500 and the left rear control arm frame 700 are connected to the left longitudinal beam 300, and the right front control arm frame 600 and the right rear control arm frame 800 are connected to the right longitudinal beam 400. A stabilizer bar mounting groove 900 is provided on the longitudinal beam, and a stabilizer bar mounting hole 1000 is provided on the stabilizer bar mounting groove 900. Here, one stabilizer bar mounting groove 900 is provided on each of the left longitudinal beam 300 and the right longitudinal beam 400, and the stabilizer bar is fixed through the stabilizer bar mounting hole 1000. In order to facilitate the installation of the front part of the subframe on the vehicle body, the two ends of the front cross beam 100 are respectively provided with a first front vehicle body mounting hole 1001 and a second front vehicle body mounting hole 1002. The motor mounting bracket of the front cross beam 100 is divided into a first motor mounting bracket 1003 and a second motor mounting bracket 1004. The front cross beam 100 is provided with a front core-pulling structure extending towards the longitudinal beam and improving the mode of the front vehicle body mounting hole and the motor mounting bracket. The front core-pulling structure includes a first front core-pulling structure and a second front core-pulling structure. Here, by using the first front core-pulling structure and the second front core-pulling structure, the mode at the front vehicle body mounting hole and the motor mounting bracket can be significantly improved. The first front core-pulling structure is a first inner hollow groove 1005 extending towards the left longitudinal beam 300 and terminating at the back of the stabilizer bar mounting hole 1000. The second front core-pulling structure is a second inner hollow groove 1006 extending towards the right longitudinal beam 400 and terminating at the back of the stabilizer bar mounting hole 1000. An inner vertical rib 1006a connected to the second motor mounting bracket 1004 is provided in the second inner hollow groove 1006. Here, since the second motor mounting bracket 1004 is just in the core-pulling position, the inner vertical rib 1006a is directly connected to the second motor mounting bracket 1004, further improving the strength of the second motor mounting bracket 1004.

[0021] Both ends of the rear crossbeam 200 are respectively provided with a first rear body mounting hole 1007 and a second rear body mounting hole 1008. As a further optimization, for the convenience of connecting with the rear body, a first sleeve 1009 is embedded in the first rear body mounting hole 1007, and a second sleeve 1010 is embedded in the second rear body mounting hole 1008. A first rearward core-pulling structure extending in the direction of the left longitudinal beam 300 is provided beside the first rear body mounting hole 1007. The first rearward core-pulling structure is a first cross groove 1011. A second rearward core-pulling structure extending in the direction of the right longitudinal beam 400 is provided beside the second rear body mounting hole 1008. The first rearward core-pulling structure is a second cross groove 1012. Through the first cross groove 1011 and the second cross groove 1012, both a certain strength can be ensured and the overall mode of the rear body mounting hole can be significantly improved.

[0022] To prevent interference from other parts, the left longitudinal beam is provided with a first avoidance arc 101, and a first lateral core-pulling structure is provided on the first avoidance arc 1013. The right longitudinal beam is provided with a second avoidance arc 1014, and a second lateral core-pulling structure is provided on the second avoidance arc 1014. The first lateral core-pulling structure and the second lateral core-pulling structure are lateral grooves 1015 with an X shape inside. Here, by using the X-shaped lateral grooves 1015, the longitudinal mode of the control arm and the overall subframe can be improved. After overall high-pressure vacuum casting and machining by a five-axis CNC machine, the overall dimensional accuracy is high. The positional tolerance of 2.0 for the ordinary welded subframe can be improved to a position of 0.5. Due to the absence of welding deformation, the dimensional accuracy is more stable, and the product CPK≥1.33.

[0023] It should be noted that in the present invention, descriptions such as "first", "second", and "one" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A multi-direction core-pulling aluminum alloy subframe, characterized in that, It includes a main body integrally die-cast under high pressure. The main body includes two cross beams, two longitudinal beams, a front control arm bracket, and a rear control arm bracket. The longitudinal beams are connected between the cross beams. There are body mounting holes on the cross beams, and there are front-to-back core-pulling structures extending towards the longitudinal beams on the body mounting holes. The front control arm bracket and the rear control arm bracket are connected to the longitudinal beams. There is a lateral core-pulling structure on the longitudinal beam between the front control arm bracket and the rear control arm bracket. The two cross beams are the front cross beam and the rear cross beam respectively. A motor mount bracket is connected to the front cross beam. The two longitudinal beams are divided into a left longitudinal beam and a right longitudinal beam. There is a stabilizer bar mounting groove on the longitudinal beam, and there is a stabilizer bar mounting hole on the stabilizer bar mounting groove. The two ends of the front cross beam respectively have a first front body mounting hole and a second front body mounting hole. The motor mount bracket on the front cross beam is divided into a first motor mount bracket and a second motor mount bracket. There is a front core-pulling structure extending towards the longitudinal beam on the front cross beam to improve the modal of the front body mounting hole and the motor mount bracket. The front core-pulling structure includes a first front core-pulling structure and a second front core-pulling structure. The first front core-pulling structure is a first inner hollow groove extending towards the left longitudinal beam and terminating at the back of the stabilizer bar mounting hole. The second front core-pulling structure is a second inner hollow groove extending towards the right longitudinal beam and terminating at the back of the stabilizer bar mounting hole. There is an inner vertical rib connected to the second motor mount bracket in the second inner hollow groove. The two ends of the rear cross beam respectively have a first rear body mounting hole and a second rear body mounting hole. There is a first rear core-pulling structure extending towards the left longitudinal beam beside the first rear body mounting hole. The first rear core-pulling structure is a first cross groove. There is a second rear core-pulling structure extending towards the right longitudinal beam beside the second rear body mounting hole. The first rear core-pulling structure is a second cross groove; The left longitudinal beam has a first avoidance arc, and there is a first lateral core-pulling structure on the first avoidance arc. The right longitudinal beam has a second avoidance arc, and there is a second lateral core-pulling structure on the second avoidance arc. The first lateral core-pulling structure and the second lateral core-pulling structure are lateral grooves with an X shape inside.

2. The multi-directional core-pulling aluminum alloy subframe according to claim 1, characterized in that, A first sleeve is embedded in the first rear body mounting hole, and a second sleeve is embedded in the second rear body mounting hole.

3. A multi-directional core-pulling aluminum alloy subframe according to claim 1, characterized in that, There are continuous reinforcing ribs inside the front cross beam, the rear cross beam, the left longitudinal beam, and the right longitudinal beam.

4. A multi-directional core-pulling aluminum alloy subframe according to claim 1, characterized in that, The front control arm bracket includes a left front control arm bracket and a right front control arm bracket. The rear control arm bracket includes a left rear control arm bracket and a right rear control arm bracket. The left front control arm bracket and the left rear control arm bracket are connected to the left longitudinal beam. The right front control arm bracket and the right rear control arm bracket are connected to the right longitudinal beam.

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