Aluminum alloy front subframe of range-extended electric vehicle and vehicle

Abstract

The present invention relates to an aluminum alloy front subframe of an extended-range electric vehicle and a vehicle, which comprises: two aluminum alloy bodies, the two aluminum alloy bodies are arranged at intervals along an extension direction perpendicular to the aluminum alloy bodies; at least three extruded aluminum alloy crossbeams, the at least three extruded aluminum alloy crossbeams are arranged at intervals along the extension direction of the aluminum alloy bodies, and one end of each extruded aluminum alloy crossbeam is welded to one of the aluminum alloy bodies, and the other end is welded to another of the aluminum alloy bodies. Since the two aluminum alloy bodies are welded into a whole by at least three extruded aluminum alloy crossbeams, the strength of the front subframe can be effectively improved, and the two bodies and multiple crossbeams of the front subframe are all made of aluminum alloy structure, which can effectively reduce the weight of the front subframe. Therefore, the aluminum alloy front subframe of the extended-range electric vehicle provided by the embodiment of the present invention can effectively reduce the weight of the whole vehicle, and at the same time can improve the strength and rigidity of the front suspension system of the extended-range electric vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of front subframes, and in particular to an aluminum alloy front subframe of a range-extended electric vehicle and a vehicle. Background Art

[0002] At present, the global automobile production and ownership are increasing, and the safety requirements for automobiles are getting higher and higher. The front subframe assembly is an important part of the current vehicle frame. The structural form, rigidity and strength of the front subframe assembly of the vehicle have a great impact on the durability, comfort and handling of the whole vehicle. It is an important basis for measuring the stability and comfort level of the vehicle. Therefore, the research on the structural design and optimization technology of the front subframe assembly of the vehicle has attracted much attention.

[0003] In extended-range electric vehicles, the front subframe is an important component in the chassis of the extended-range electric vehicle, which is used to support the rod system and other functional parts of the range extender powertrain and suspension system.

[0004] In the related art, the front subframe of the current extended-range electric vehicle is basically made of steel or a mixture of steel and aluminum, and is heavy. It is necessary to design a new aluminum alloy front subframe and vehicle for the extended-range electric vehicle to overcome the above problems. Summary of the invention

[0005] The embodiment of the present invention provides an aluminum alloy front subframe of a range-extended electric vehicle and a vehicle, so as to solve the problem that the front subframe of the range-extended electric vehicle in the related art is basically made of steel or a mixture of steel and aluminum and is heavy.

[0006] In a first aspect, an aluminum alloy front subframe of an extended-range electric vehicle is provided, comprising: two aluminum alloy bodies, the two aluminum alloy bodies are spaced apart along an extension direction perpendicular to the aluminum alloy bodies; at least three extruded aluminum alloy cross beams, at least three extruded aluminum alloy cross beams are spaced apart along the extension direction of the aluminum alloy bodies, and one end of each of the extruded aluminum alloy cross beams is welded to one aluminum alloy body, and the other end is welded to another aluminum alloy body.

[0007] In some embodiments, each of the aluminum alloy bodies includes a first cast aluminum alloy support, a second cast aluminum alloy support and an extruded aluminum alloy rod, wherein the extruded aluminum alloy rod is located between the first cast aluminum alloy support and the second cast aluminum alloy support, and the extruded aluminum alloy rod connects the first cast aluminum alloy support and the second cast aluminum alloy support by welding.

[0008] In some embodiments, the at least three extruded aluminum alloy cross beams include a front cross beam, a middle cross beam and a rear cross beam, the front cross beam is connected to the front end of the first cast aluminum alloy support, the middle cross beam is connected to the connection between the first cast aluminum alloy support and the extruded aluminum alloy rod, and the rear cross beam is connected to the rear end of the second cast aluminum alloy support.

[0009] In some embodiments, the middle cross beam is arranged parallel to the rear cross beam, and two reinforcing rods are arranged between the middle cross beam and the rear cross beam. The reinforcing rods are extruded aluminum alloy parts, one end of the reinforcing rods is welded to the middle cross beam, and the other end is welded to the second cast aluminum alloy support, and the two reinforcing rods extend obliquely from the connection with the second cast aluminum alloy support in a direction approaching each other to the middle cross beam.

[0010] In some embodiments, a cavity is provided inside the middle cross beam, and an X-shaped reinforcing rib is provided inside the cavity.

[0011] In some embodiments, a range extender mounting structure is provided on the front cross beam, a first motor mounting structure is provided at the connection between each of the first cast aluminum alloy supports and the middle cross beam, and a second motor mounting structure is provided at each of the second cast aluminum alloy supports.

[0012] In some embodiments, the first cast aluminum alloy support includes a first support body, and the first mounting structure of the motor includes: a mounting surface, which is arranged on the first support body and extends vertically, and a first mounting hole is provided on the mounting surface; a mounting plate, which extends from the first support body toward a direction close to another first cast aluminum alloy support, and the plate surface of the mounting plate is substantially perpendicular to the mounting surface, and a second mounting hole is provided on the mounting plate; and a mounting column, the axis of the mounting column extends vertically, and the mounting column is provided with a third mounting hole extending along the axis direction thereof, the positions of the third mounting hole, the second mounting hole and the third mounting hole are arranged in a triangle, and the axes of the third mounting hole, the second mounting hole and the third mounting hole are perpendicular to each other.

[0013] In some embodiments, the rear end of the first support body extends toward the direction approaching the other first cast aluminum alloy support to form a mounting seat, the mounting seat is connected to the middle cross beam, the mounting seat and the mounting plate are spaced apart in the front-to-back direction so that a gap is formed between the mounting seat and the mounting plate, the first support body is provided with a notch corresponding to the gap, and the notch is connected to the gap; the mounting column is provided on the top surface of the mounting seat, and the bottom surface of the mounting column is connected to the mounting seat, and the side surface is connected to the first support body.

[0014] In some embodiments, the second cast aluminum alloy support includes a second support body, and the second mounting structure of the motor includes a fixing column, the fixing column is fixed to the top surface of the second support body, and the axis of the fixing column extends along the axis direction of the rear cross beam, a fourth mounting hole is provided in the fixing column, a rubber bushing is pressed in the fourth mounting hole, and the axis of the fourth mounting hole is parallel to the axis of the first mounting hole.

[0015] In a second aspect, a vehicle is provided, which includes the above-mentioned extended-range electric vehicle aluminum alloy front subframe.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include:

[0017] An embodiment of the present invention provides an aluminum alloy front subframe of an extended-range electric vehicle and a vehicle. Since the two aluminum alloy main bodies are welded into a whole through at least three extruded aluminum alloy cross beams, the strength and rigidity of the front subframe can be effectively improved. In addition, the two main bodies and multiple cross beams of the front subframe all adopt an aluminum alloy structure, which can effectively reduce the weight of the front subframe. Therefore, the aluminum alloy front subframe of the extended-range electric vehicle provided by the embodiment of the present invention can effectively reduce the weight of the entire vehicle and improve the strength and rigidity of the front suspension system of the extended-range electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic top view of an aluminum alloy front subframe of a range-extended electric vehicle provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the three-dimensional structure of an aluminum alloy front subframe of a range-extended electric vehicle provided by an embodiment of the present invention;

[0021] Figure 3 A schematic cross-sectional view of a middle cross beam provided in an embodiment of the present invention.

[0022] In the figure:

[0023] 1. Aluminum alloy body; 11. First cast aluminum alloy support; 111. First support body; 112. Mounting seat; 113. Gap; 114. Notch; 12. Second cast aluminum alloy support; 121. Second support body; 13. Extruded aluminum alloy rod;

[0024] 2. Front crossbeam; 3. Middle crossbeam; 31. Cavity; 32. Reinforcement ribs; 4. Rear crossbeam; 5. Reinforcement rod; 6. Range extender mounting structure;

[0025] 7. First mounting structure of the motor; 71. Mounting surface; 711. First mounting hole; 72. Mounting plate; 721. Second mounting hole; 73. Mounting column; 731. Third mounting hole;

[0026] 8. Second mounting structure of the motor; 81. Fixed column; 811. Fourth mounting hole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The embodiment of the present invention provides an aluminum alloy front subframe of a range-extended electric vehicle and a vehicle, which can solve the problem in the related art that the front subframe of the range-extended electric vehicle is basically made of steel or a mixture of steel and aluminum and is heavy.

[0029] See also Figure 1 and Figure 2 As shown, an aluminum alloy front subframe of an extended-range electric vehicle provided by an embodiment of the present invention may include: two aluminum alloy bodies 1, the two aluminum alloy bodies 1 are arranged at intervals along an extension direction perpendicular to the aluminum alloy bodies 1. In this embodiment, the aluminum alloy bodies 1 are made of aluminum alloy and are light in weight. Each of the aluminum alloy bodies 1 extends along the front-to-back direction of the vehicle, and the two aluminum alloy bodies 1 are arranged at intervals along the left-to-right direction of the vehicle. The two aluminum alloy bodies 1 can be arranged at an angle to each other, that is, the distance between the front ends of the two aluminum alloy bodies 1 is large, the distance between the rear ends is small, and the two aluminum alloy bodies 1 are arranged symmetrically on the left and right; at least three extruded aluminum alloy beams, that is, the beams are extruded and made of aluminum alloy, at least three extruded aluminum alloy beams are arranged at intervals along the extension direction of the aluminum alloy bodies 1, that is, they are distributed at intervals along the front-to-back direction, and one end of each extruded aluminum alloy beam is welded with one aluminum alloy body 1, and the other end is welded with another aluminum alloy body 1. That is to say, the extruded aluminum alloy cross beam is disposed between the two aluminum alloy bodies 1 and connects the two aluminum alloy bodies 1 into a whole.

[0030] An extended-range electric vehicle aluminum alloy front subframe provided in an embodiment of the present invention has two aluminum alloy main bodies 1 welded into a whole by at least three extruded aluminum alloy cross beams, and at least three extruded aluminum alloy cross beams are distributed between the two aluminum alloy main bodies 1 in the front-to-back direction. The front, middle and rear portions of the two aluminum alloy main bodies 1 are welded and connected, which can effectively improve the strength and rigidity of the front subframe. Moreover, the two main bodies and multiple cross beams of the front subframe all adopt an aluminum alloy structure, which can effectively reduce the weight of the front subframe compared with steel or a steel-aluminum mixed material. Therefore, the extended-range electric vehicle aluminum alloy front subframe provided in an embodiment of the present invention can effectively reduce the weight of the entire vehicle, and at the same time can improve the strength and rigidity of the front suspension system of the extended-range electric vehicle.

[0031] In some embodiments, see Figure 1 and Figure 2 As shown, each of the aluminum alloy bodies 1 may include a first cast aluminum alloy support 11, a second cast aluminum alloy support 12 and an extruded aluminum alloy rod 13, that is, the two supports are cast aluminum alloy parts, the extruded aluminum alloy rod 13 is an extruded aluminum alloy part, the extruded aluminum alloy rod 13 is located between the first cast aluminum alloy support 11 and the second cast aluminum alloy support 12, and the extruded aluminum alloy rod 13 connects the first cast aluminum alloy support 11 and the second cast aluminum alloy support 12 by welding. In this embodiment, the first cast aluminum alloy support 11 may be located in front of the second cast aluminum alloy support 12, that is, the first cast aluminum alloy support 11 is the front support, the second cast aluminum alloy support 12 is the rear support, and the front support and the rear support are welded and connected as a whole by the extruded aluminum alloy rod 13. The two supports have complex structures and are easy to process and shape by casting, and then the cast aluminum alloy part and the extruded aluminum alloy part are connected into a whole by welding.

[0032] In some optional embodiments, see Figure 1 and Figure 2As shown, the at least three extruded aluminum alloy cross beams may include a front cross beam 2, a middle cross beam 3 and a rear cross beam 4, wherein the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 are distributed in the front-to-back direction, and the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 all extend from one of the aluminum alloy bodies 1 to another of the aluminum alloy bodies 1 in the left-right direction. The front cross beam 2 may be connected to the front end of the first cast aluminum alloy support 11, that is, one end of the front cross beam 2 is connected to the front end of the first cast aluminum alloy support 11 on the left, and the other end is connected to the front end of the first cast aluminum alloy support 11 on the right, thereby enhancing the strength of the first cast aluminum alloy support 11 at the front end; the middle cross beam 3 may be connected to the connection between the first cast aluminum alloy support 11 and the extruded aluminum alloy rod 13, that is, one end of the middle cross beam 3 is connected to the rear end of the first cast aluminum alloy support 11 on the left, and the other end is connected to the first cast aluminum alloy support 11 on the right. The rear end of the first cast aluminum alloy support 11 is connected to the rear end of the second cast aluminum alloy support 12, thereby enhancing the connection strength of the rear end of the first cast aluminum alloy support 11. At the same time, since the middle cross beam 3 is connected to the connection between the first cast aluminum alloy support 11 and the extruded aluminum alloy rod 13, the connection strength between the first cast aluminum alloy support 11 and the extruded aluminum alloy rod 13 can also be enhanced; the rear cross beam 4 can be connected to the rear end of the second cast aluminum alloy support 12, that is, one end of the rear cross beam 4 is connected to the second cast aluminum alloy support 12 on the left side, and the other end is connected to the second cast aluminum alloy support 12 on the right side, thereby enhancing the strength of the second cast aluminum alloy support 12 at the rear end. In this embodiment, the arrangement of the front, middle and rear three cross beams can effectively improve the strength of the front subframe.

[0033] Of course, in other embodiments, four, five or more extruded aluminum alloy cross beams may be provided as required to meet actual needs.

[0034] In some embodiments, see Figure 1 and Figure 2As shown, the middle cross beam 3 is arranged in parallel with the rear cross beam 4, and two reinforcing rods 5 can be arranged between the middle cross beam 3 and the rear cross beam 4. The reinforcing rod 5 is an extruded aluminum alloy part to ensure that the weight of the entire front subframe is light. One end of the reinforcing rod 5 is welded to the middle cross beam 3, and the other end is welded to the second cast aluminum alloy support 12, that is, one end of each reinforcing rod 5 is connected to the middle cross beam 3, the other end of one reinforcing rod 5 is connected to the second cast aluminum alloy support 12 on the left, and the other end of the other reinforcing rod 5 is connected to the second cast aluminum alloy support 12 on the right; and the two reinforcing rods 5 The reinforcing rod 5 is inclined and extends from the connection with the second cast aluminum alloy support 12 in a direction approaching each other to the middle cross beam 3, so that the reinforcing rod 5 is arranged at a certain angle relative to the middle cross beam 3 or the rear cross beam 4, and the middle cross beam 3, the rear cross beam 4 and the two reinforcing rods 5 can form an isosceles trapezoidal structure. At the same time, the reinforcing rod 5 on the left side can form a triangular structure with the extruded aluminum alloy rod 13 on the left side and the middle cross beam 3, and the reinforcing rod 5 on the right side can also form a triangular structure with the extruded aluminum alloy rod 13 on the right side and the middle cross beam 3, which can significantly improve the structural rigidity and strength of the front subframe.

[0035] In this embodiment, the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 are all arranged in parallel. In other embodiments, the front cross beam 2, the middle cross beam 3 and the rear cross beam 4 can also be arranged to be inclined to each other according to actual needs.

[0036] Based on the above technical solution, in some embodiments, see Figure 3 As shown, in order to further improve the strength of the front subframe, a cavity 31 may be provided inside the middle cross beam 3, that is, the middle cross beam 3 may be hollow, and an X-shaped reinforcing rib 32 may be provided inside the cavity 31. In this embodiment, the cross-sectional shape of the middle cross beam 3 is rectangular, the X-shaped reinforcing rib 32 is arranged at the center of the cavity 31, and the four end points of the X-shaped reinforcing rib 32 are respectively connected to the four vertices of the rectangular cavity 31.

[0037] In some optional embodiments, the front cross beam 2 may be provided with a range extender mounting structure 6, which is a mounting point of the range extender and is used to install the range extender. Each of the first cast aluminum alloy supports 11 and the middle cross beam 3 is provided with a first motor mounting structure 7, and each of the second cast aluminum alloy supports 12 is provided with a second motor mounting structure 8. The first motor mounting structure 7 and the second motor mounting structure 8 are mounting points of the motor and are used to install the motor. The two first cast aluminum alloy supports 11 and the two second cast aluminum alloy supports 12 are provided with a total of 4 motor mounting points, which are arranged at both ends of the middle cross beam 3 and the rear cross beam 4, respectively.

[0038] In the related art, the front subframe of the current extended-range electric vehicle usually has fewer fixing points for the powertrain, resulting in poor NVH performance; in this embodiment, by arranging more range extender and motor mounting points on the front subframe, the structural stability and NVH performance of the range extender and the motor can be effectively improved.

[0039] Furthermore, the range extender mounting structure 6 may be two range extender mounting holes arranged on the front cross beam 2, and the two range extender mounting holes are arranged at intervals so that the range extender can be mounted on the two range extender mounting holes by bolts. In this embodiment, the two range extender mounting holes are arranged closer to the left side.

[0040] In some embodiments, see Figure 1 and Figure 2As shown, the first cast aluminum alloy support 11 may include a first support body 111, and the first motor mounting structure 7 may include: a mounting surface 71, the mounting surface 71 is arranged on the first support body 111, that is, the mounting surface 71 may be a side surface of the first support body 111, and the mounting surface 71 extends vertically, and a first mounting hole 711 is provided on the mounting surface 71. In this embodiment, the mounting surface 71 also extends in the front-to-back direction, so that the axial direction of the first mounting hole 711 is the left-to-right direction; a mounting plate 72, the mounting plate 72 extends from the first support body 111 toward a direction close to another first cast aluminum alloy support 11, that is, the plate surface of the mounting plate 72 extends in the left-to-right direction, and the mounting plates 72 on the two first cast aluminum alloy supports 11 extend in a direction close to each other, and the The plate surface of the mounting plate 72 is substantially perpendicular to the mounting surface 71, and a second mounting hole 721 is provided on the mounting plate 72. Since the plate surface of the mounting plate 72 is substantially perpendicular to the mounting surface 71, the axis of the second mounting hole 721 on the mounting plate 72 is perpendicular to the axis of the first mounting hole 711. In this embodiment, the axis of the second mounting hole 721 extends in the front-to-back direction; and a mounting column 73, the axis of the mounting column 73 extends vertically, and the mounting column 73 is provided with a third mounting hole 731 extending along its axial direction, that is, the axis of the third mounting hole 731 extends in the up-down direction, and the positions of the third mounting hole 731, the second mounting hole 721 and the third mounting hole 731 are arranged in a triangle, and the axes of the third mounting hole 731, the second mounting hole 721 and the third mounting hole 731 are perpendicular to each other.

[0041] In this embodiment, the positions of the second mounting hole 721 and the third mounting hole 731 are distributed along the front-to-back direction, the positions of the first mounting hole 711 and the second mounting hole 721 are distributed along the left-to-right direction, and the position of the first mounting hole 711 is higher than the second mounting hole 721 and the third mounting hole 731, so that the positions of the third mounting hole 731, the second mounting hole 721 and the third mounting hole 731 are arranged in a triangular shape, and the suspension can be stably supported in multiple directions at this mounting point. In addition, the mounting surface 71 can be limited in the left-to-right direction, the mounting plate 72 can be limited in the front-to-back direction, and the mounting column 73 can be limited in the up-down direction.

[0042] For further information, see Figure 1 and Figure 2As shown, the rear end of the first support body 111 extends toward the direction close to the other first cast aluminum alloy support 11 to form a mounting seat 112, that is, the mounting seats 112 on the two first cast aluminum alloy supports 11 are also formed by extending toward the direction close to each other, the mounting seat 112 is connected to the middle cross beam 3, the mounting seat 112 and the mounting plate 72 are arranged in a spaced relationship along the front-to-back direction, so that a gap 113 is formed between the mounting seat 112 and the mounting plate 72, and the first support body 111 is provided with a notch 114 corresponding to the gap 113, and the notch 114 is connected to the gap 113; the mounting column 73 is arranged on the top surface of the mounting seat 112, and the bottom surface of the mounting column 73 is connected to the mounting seat 112, and the side surface is connected to the first support body 111. In this embodiment, the mounting column 73 is arranged at the connection between the mounting seat 112 and the middle cross beam 3, so that the middle cross beam 3 and the mounting seat 112 can jointly bear the force on the mounting column 73. The notch 114 and the gap 113 provided on both sides can be used for installing a steering gear.

[0043] In some embodiments, see Figure 1 and Figure 2 As shown, the second cast aluminum alloy support 12 may include a second support body 121, and the second motor mounting structure 8 includes a fixing column 81, which is fixed to the top surface of the second support body 121, and the axis of the fixing column 81 extends along the axis direction of the rear cross beam 4, that is, extends in the left and right direction, and a fourth mounting hole 811 is provided in the fixing column 81, and a rubber bushing is pressed into the fourth mounting hole 811, and the axis of the fourth mounting hole 811 is parallel to the axis of the first mounting hole 711. In this embodiment, the provision of the rubber bushing can reduce the wear on the fourth mounting hole 811.

[0044] The embodiment of the present invention further provides a vehicle, which may include the above-mentioned extended-range electric vehicle aluminum alloy front subframe. The extended-range electric vehicle aluminum alloy front subframe may include: two aluminum alloy bodies 1, which are arranged at intervals along the extension direction perpendicular to the aluminum alloy body 1; at least three extruded aluminum alloy cross beams, which are arranged at intervals along the extension direction of the aluminum alloy body 1, and each of the extruded aluminum alloy cross beams has one aluminum alloy body 1 welded to one end and another aluminum alloy body 1 welded to the other end.

[0045] In some embodiments, each of the aluminum alloy bodies 1 includes a first cast aluminum alloy support 11, a second cast aluminum alloy support 12 and an extruded aluminum alloy rod 13, wherein the extruded aluminum alloy rod 13 is located between the first cast aluminum alloy support 11 and the second cast aluminum alloy support 12, and the extruded aluminum alloy rod 13 connects the first cast aluminum alloy support 11 and the second cast aluminum alloy support 12 by welding.

[0046] In some optional embodiments, the at least three extruded aluminum alloy cross beams include a front cross beam 2, a middle cross beam 3 and a rear cross beam 4, the front cross beam 2 is connected to the front end of the first cast aluminum alloy support 11, the middle cross beam 3 is connected to the connection between the first cast aluminum alloy support 11 and the extruded aluminum alloy rod 13, and the rear cross beam 4 is connected to the rear end of the second cast aluminum alloy support 12.

[0047] In some embodiments, the middle cross beam 3 is arranged in parallel with the rear cross beam 4, and two reinforcing rods 5 are arranged between the middle cross beam 3 and the rear cross beam 4. The reinforcing rods 5 are extruded aluminum alloy parts, one end of the reinforcing rods 5 is welded to the middle cross beam 3, and the other end is welded to the second cast aluminum alloy support 12, and the two reinforcing rods 5 extend obliquely from the connection with the second cast aluminum alloy support 12 in a direction close to each other to the middle cross beam 3.

[0048] Preferably, a cavity 31 is provided inside the middle cross beam 3 , and an X-shaped reinforcing rib 32 is provided inside the cavity 31 .

[0049] In some embodiments, a range extender mounting structure 6 is provided on the front cross beam 2, a first motor mounting structure 7 is provided at the connection between each first cast aluminum alloy support 11 and the middle cross beam 3, and each second cast aluminum alloy support 12 is provided with a second motor mounting structure 8.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0051] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An aluminum alloy front subframe for a range-extended electric vehicle, characterized in that: It includes: Two aluminum alloy bodies (1), the two aluminum alloy bodies (1) being arranged at intervals along an extension direction perpendicular to the aluminum alloy bodies (1); At least three extruded aluminum alloy cross beams, wherein the at least three extruded aluminum alloy cross beams are arranged at intervals along the extension direction of the aluminum alloy body (1), and each of the extruded aluminum alloy cross beams is welded to one of the aluminum alloy bodies (1) at one end and to another of the aluminum alloy bodies (1) at the other end; Each of the aluminum alloy bodies (1) comprises a first cast aluminum alloy support (11), a second cast aluminum alloy support (12), and an extruded aluminum alloy rod (13); the extruded aluminum alloy rod (13) is located between the first cast aluminum alloy support (11) and the second cast aluminum alloy support (12); and the extruded aluminum alloy rod (13) connects the first cast aluminum alloy support (11) and the second cast aluminum alloy support (12) by welding; The at least three extruded aluminum alloy cross beams include a front cross beam (2), a middle cross beam (3) and a rear cross beam (4); the front cross beam (2) is connected to the front end of the first cast aluminum alloy support (11); the middle cross beam (3) is connected to the connection between the first cast aluminum alloy support (11) and the extruded aluminum alloy rod (13); the rear cross beam (4) is connected to the rear end of the second cast aluminum alloy support (12); one end of the rear cross beam (4) is connected to the second cast aluminum alloy support (12) on the left side, and the other end is connected to the second cast aluminum alloy support (12) on the right side; The middle cross beam (3) and the rear cross beam (4) are arranged in parallel; Two reinforcing rods (5) are arranged between the middle cross beam (3) and the rear cross beam (4); the reinforcing rods (5) are extruded aluminum alloy parts, one end of the reinforcing rod (5) is welded to the middle cross beam (3), and the other end is welded to the second cast aluminum alloy support (12); and the two reinforcing rods (5) extend from the connection with the second cast aluminum alloy support (12) in a direction close to each other to the middle cross beam (3); The front crossbeam (2) is provided with a range extender mounting structure (6), each of the first cast aluminum alloy supports (11) and the middle crossbeam (3) is provided with a first motor mounting structure (7), and each of the second cast aluminum alloy supports (12) is provided with a second motor mounting structure (8); The first cast aluminum alloy support (11) comprises a first support body (111), and the first motor mounting structure (7) comprises: A mounting surface (71), the mounting surface (71) being provided on the first support body (111), the mounting surface (71) extending vertically, and a first mounting hole (711) being provided on the mounting surface (71); The second cast aluminum alloy support (12) comprises a second support body (121), and the second motor mounting structure (8) comprises a fixing column (81), wherein the fixing column (81) is fixedly arranged on the top surface of the second support body (121), and the axis of the fixing column (81) extends along the axis direction of the rear cross beam (4), and a fourth mounting hole (811) is arranged in the fixing column (81), a rubber bushing is press-fitted in the fourth mounting hole (811), and the axis of the fourth mounting hole (811) is parallel to the axis of the first mounting hole (711).

2. The aluminum alloy front subframe of the range-extended electric vehicle according to claim 1, characterized in that: A cavity (31) is provided inside the middle cross beam (3), and an X-shaped reinforcing rib (32) is provided inside the cavity (31).

3. The aluminum alloy front subframe of the range-extended electric vehicle according to claim 1, characterized in that: The first motor mounting structure (7) further comprises: a mounting plate (72), the mounting plate (72) extending from the first support body (111) in a direction close to the other first cast aluminum alloy support (11), and the plate surface of the mounting plate (72) is substantially perpendicular to the mounting surface (71), and a second mounting hole (721) is provided on the mounting plate (72); and a mounting column (73), wherein the axis of the mounting column (73) extends vertically, and the mounting column (73) is provided with a third mounting hole (731) extending along the axis direction thereof, the third mounting hole (731), the second mounting hole (721) and the third mounting hole (731) are arranged in a triangular shape, and the axes of the third mounting hole (731), the second mounting hole (721) and the third mounting hole (731) are perpendicular to each other.

4. The aluminum alloy front subframe of the range-extended electric vehicle as claimed in claim 3, characterized in that: The rear end of the first support body (111) extends in a direction close to the other first cast aluminum alloy support (11) to form a mounting seat (112); the mounting seat (112) is connected to the middle cross beam (3); the mounting seat (112) and the mounting plate (72) are arranged at intervals in the front-to-rear direction, so that a gap (113) is formed between the mounting seat (112) and the mounting plate (72); the first support body (111) is provided with a notch (114) corresponding to the gap (113); the notch (114) is in communication with the gap (113); The mounting column (73) is arranged on the top surface of the mounting seat (112), and the bottom surface of the mounting column (73) is connected to the mounting seat (112), and the side surface is connected to the first support body (111).

5. A vehicle, characterized in that: It includes the aluminum alloy front subframe of the range-extended electric vehicle as described in any one of claims 1 to 4.

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