Auxiliary frame and vehicle with same

Abstract

The auxiliary frame comprises an auxiliary frame body, the auxiliary frame body comprises two cross beams and two longitudinal beams, the two cross beams extend in the first direction and are arranged at intervals in the second direction, the first direction intersects with the second direction, and the two longitudinal beams extend in the second direction and are arranged at intervals in the first direction; the two ends, in the second direction, of the two longitudinal beams are connected with the two cross beams correspondingly. The reinforcing beam is arranged between the two longitudinal beams and extends in the second direction, and the two ends, in the second direction, of the reinforcing beam are connected with the two cross beams correspondingly. According to the auxiliary frame, when a vehicle collides, the reinforcing beams can effectively absorb collision energy through crushing deformation, so that deformation of a passenger compartment is reduced, the structural integrity of the passenger compartment is guaranteed, and the safety and reliability of the vehicle are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a subframe and a vehicle having the same. Background Art

[0002] With the rapid development of the automotive industry, automobiles have become an important means of transportation for people's daily travel. The frequent occurrence of traffic safety accidents has made the safety performance of automobiles more and more concerned by consumers. The center pillar collision condition of a passenger car simulates that the vehicle hits a utility pole or a tree beside a public road during driving. This condition is a common condition for users during driving. Therefore, how to improve the center pillar collision performance of the vehicle is crucial.

[0003] When a vehicle has a center pillar collision, relying solely on the front longitudinal beam of the vehicle body skeleton cannot fully absorb the energy during the frontal collision of the vehicle. In the prior art, a front subframe is usually used to achieve load transfer and absorption of collision energy. However, the main function of the current vehicle's front subframe is to connect the front axle to the engine and, at the same time, serve as a fulcrum for the front suspension to reduce the vibration of the vehicle body during driving. Basically, there is no energy absorption design. When the vehicle has a center pillar collision, it cannot well ensure the structural integrity of the passenger compartment and makes little contribution to collision safety. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a subframe. When a vehicle has a collision, the reinforcing beam of the subframe can effectively absorb the collision energy through crush deformation, thereby reducing the deformation of the passenger compartment, ensuring the structural integrity of the passenger compartment, and effectively improving the safety and reliability of the vehicle.

[0005] The present invention also provides a vehicle having the above subframe.

[0006] The subframe according to the first aspect of the present invention includes: a subframe body, the subframe body includes two cross beams and two longitudinal beams, the two cross beams extend along a first direction and are arranged at intervals in a second direction, the first direction intersects the second direction, the two longitudinal beams extend along the second direction and are arranged at intervals in the first direction, and two ends of the two longitudinal beams in the second direction are respectively connected to the two cross beams; a reinforcing beam, the reinforcing beam is arranged between the two longitudinal beams and extends along the second direction, and two ends of the reinforcing beam in the second direction are respectively connected to the two cross beams.

[0007] According to the subframe of the present invention, by providing a subframe body and a reinforcing beam in the subframe, the subframe body includes two cross beams and two longitudinal beams. The two cross beams extend along a first direction and are arranged at intervals in a second direction. The first direction intersects the second direction. The two longitudinal beams extend along the second direction and are arranged at intervals in the first direction. The two longitudinal beams are respectively connected to the two cross beams at both ends in the second direction. The reinforcing beam is provided between the two longitudinal beams and extends along the second direction. The two ends of the reinforcing beam in the second direction are respectively connected to the two cross beams. When a vehicle collides, the reinforcing beam of the subframe can effectively absorb the collision energy through crush deformation, thereby reducing the deformation of the passenger compartment, ensuring the structural integrity of the passenger compartment, and effectively improving the safety and reliability of the vehicle.

[0008] In some embodiments, the two cross beams are respectively a first cross beam and a second cross beam. The reinforcing beam includes: a first beam segment and a plurality of second beam segments. The first beam segment extends along the second direction and one end thereof is connected to the first cross beam. The plurality of second beam segments are all connected between the other end of the first beam segment and the second cross beam, and the ends of the plurality of second beam segments connected to the second cross beam are arranged at intervals on the second cross beam.

[0009] In some embodiments, the second beam segment includes a crush section and a connection section that are sequentially connected in the second direction. The connection section is connected to the side of the crush section facing the second cross beam, and the strength of the connection section is greater than the strength of the crush section.

[0010] In some embodiments, reinforcing ribs extending along the second direction are provided on the connection section.

[0011] In some embodiments, the number of the second beam segments is two. In the direction from the first cross beam towards the second cross beam, the ends of the two second beam segments facing the second cross beam respectively extend obliquely towards the two longitudinal beams.

[0012] In some embodiments, two suspension mounting areas arranged at intervals along the first direction are provided on the second cross beam. The ends of the two second beam segments facing the second cross beam are respectively fixedly connected to the two suspension mounting areas.

[0013] In some embodiments, the reinforcing beam includes: a reinforcing upper plate and a reinforcing lower plate. The reinforcing upper plate and the reinforcing lower plate both extend along the second direction and are butted in a third direction to form a hollow beam structure with a cavity for the reinforcing beam. The first direction, the second direction, and the third direction intersect pairwise.

[0014] In some embodiments, one of the reinforcing upper plate and the reinforcing lower plate includes: a first plate which is an integral part and includes a first front plate portion and a first rear plate portion. The first front plate portion extends along the second direction, and the first rear plate portion is connected to the side of the first front plate portion facing the second cross beam. A second plate which is an integral part and includes a second front plate portion and a second rear plate portion. The second front plate portion extends along the second direction, and the second rear plate portion is connected to the side of the second front plate portion facing the second cross beam. Wherein, the first front plate portion and the second front plate portion are arranged and connected in the first direction. In the direction from the first cross beam towards the second cross beam, one end of the first rear plate portion facing the second cross beam and one end of the second rear plate portion facing the second cross beam respectively extend away from each other towards the two longitudinal beams, and the first plate and the second plate cooperate to define a cavity that is open on one side in the third direction. The other of the reinforcing upper plate and the reinforcing lower plate covers the open side of the cavity.

[0015] In some embodiments, the other of the reinforcing upper plate and the reinforcing lower plate includes: a third plate which is in a flat plate shape and includes a first front plate body and a first rear plate body connected in the second direction. The third plate covers the open side of the first plate in the third direction; a fourth plate which is in a flat plate shape and includes a second front plate body and a second rear plate body connected in the second direction. The fourth plate covers the open side of the second plate in the third direction; wherein, the first front plate portion, the second front plate portion, the first front plate body and the second front plate body together constitute the first beam segment, the first rear plate portion and the first rear plate body together constitute one of the second beam segments, and the second rear plate portion and the second rear plate body together constitute the other second beam segment.

[0016] The vehicle according to the second aspect of the present invention includes a subframe according to the first aspect of the present invention, and the subframe is the front subframe of the vehicle.

[0017] The vehicle according to the second aspect of the present invention, by providing the subframe of the first aspect, when a vehicle collision occurs, the reinforcing beam of the subframe can effectively absorb collision energy through crush deformation, thereby reducing the deformation of the occupant compartment, ensuring the structural integrity of the occupant compartment, and further effectively improving the safety and reliability of the vehicle.

[0018] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0019] Figure 1 is a schematic diagram of one angle of a subframe according to an embodiment of the present invention;

[0020] Figure 2 is a schematic view of another angle of the subframe according to an embodiment of the present invention;

[0021] Figure 3 is a schematic view of the reinforcing beam according to an embodiment of the present invention;

[0022] Figure 4 is an exploded view of the reinforcing beam according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100, subframe;

[0025] 10, subframe main body;

[0026] 11, cross beam; 111, first cross beam; 112, second cross beam; 1121, suspension mounting area;

[0027] 12, longitudinal beam;

[0028] 20, reinforcing beam;

[0029] 21, first beam segment;

[0030] 22, second beam segment; 221, crush section; 222, connection section; 2221, reinforcing rib;

[0031] 23, reinforcing upper plate; 231, first plate; 2311, first front plate part; 2312, first rear plate part; 23121, first overlapping edge; 232, second plate; 2321, second front plate part; 23211, overlapping part; 2322, second rear plate part; 23221, second overlapping edge;

[0032] 24, reinforcing lower plate; 241, third plate; 2411, first front plate body; 2412, first rear plate body; 242, fourth plate; 2421, second front plate body; 2422, second rear plate body;

[0033] 30, mounting beam. Detailed Description of the Invention

[0034] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] Reference is made below to Figures 1 - 4 describe the subframe 100 according to an embodiment of the first aspect of the present invention.

[0036] AsFigures 1 - 4 As shown, the subframe 100 according to the embodiment of the first aspect of the present invention includes: a subframe main body 10 and a reinforcing beam 20.

[0037] The subframe main body 10 includes two cross beams 11 and two longitudinal beams 12. The two cross beams 11 extend along a first direction (for example, Figure 1 and Figure 2 the left - right direction shown in the figure) and are arranged at intervals in a second direction (for example, Figure 1 and Figure 2 the front - rear direction shown in the figure). The first direction intersects the second direction. The two longitudinal beams 12 extend along the second direction and are arranged at intervals in the first direction. The two longitudinal beams 12 are respectively connected to the two cross beams 11 at both ends in the second direction; the reinforcing beam 20 is arranged between the two longitudinal beams 12 and extends along the second direction. The two ends of the reinforcing beam 20 in the second direction are respectively connected to the two cross beams 11.

[0038] Wherein, the first direction intersecting the second direction means: the first direction is not parallel to the second direction, and the first direction and the second direction are arranged at an angle. For example, the angle between the first direction and the second direction can be 30°, 45°, 60°, 80° or 90°, etc. In some specific examples, the first direction and the second direction are perpendicular to each other.

[0039] In some specific examples, as shown in Figure 1 and 2 , the first direction is the left - right direction of the subframe 100, the second direction is the front - rear direction of the subframe 100, and the first direction and the second direction are perpendicular to each other.

[0040] In some specific examples, as shown in Figure 1 and Figure 2 , the two cross beams 11 extend along the left - right direction. One cross beam 11 is arranged at intervals in front of the other cross beam 11. Further, the two cross beams 11 are arranged parallel to each other, so as to effectively disperse the impact force from the side of the subframe main body 10 and enhance the stability of the subframe main body 10.

[0041] The two longitudinal beams 12 extend along the front - rear direction. One longitudinal beam 12 is arranged at intervals on the left side of the other longitudinal beam 12. Further, in the direction from front to back, the two longitudinal beams 12 extend towards each other. That is to say, the two longitudinal beams 12 are not completely parallel, but gradually approach each other from front to back. Thus, when the vehicle collides, it can effectively guide the transmission of the collision energy and effectively absorb the collision energy.

[0042] In addition, the front ends of the two longitudinal beams 12 in the front-rear direction are welded to the front cross beam 11, and the rear ends of the two longitudinal beams 12 in the front-rear direction are welded to the rear cross beam 11. Thus, a firm connection between the cross beam 11 and the longitudinal beams 12 can be effectively ensured, so that the two cross beams 11 and the two longitudinal beams 12 can form a stable frame structure, and further, when the vehicle collides, the subframe main body 10 can effectively disperse the impact force from all directions.

[0043] In some specific examples, such as Figure 1 and Figure 2 shown, the reinforcing beam 20 extends in the front-rear direction and is located between the two longitudinal beams 12. The two ends of the reinforcing beam 20 in the front-rear direction are respectively welded to the two cross beams 11. Further, the welding method between the reinforcing beam 20 and the two cross beams 11 adopts carbon dioxide gas shielded welding.

[0044] It should be noted that carbon dioxide gas shielded welding is a welding method that uses carbon dioxide gas as a shielding gas. When welding with carbon dioxide gas shielded welding, an inert gas is used to protect the molten pool from atmospheric pollution, thereby reducing welding defects and further providing high-quality and high-strength welding joints. In addition, carbon dioxide gas shielded welding is simple to operate and can be automated, thus improving work efficiency.

[0045] When the vehicle collides, the reinforcing beam 20 can absorb the collision energy transmitted to the subframe 100 in the front-rear direction through crush deformation. That is to say, compared with the prior art, the subframe 100 of the present application can provide a new force transmission path, thereby effectively improving the absorption capacity of the subframe 100 for the collision energy transmitted to the subframe 100 in the front-rear direction, and further effectively reducing the collision energy transmitted to the passenger compartment.

[0046] In this embodiment, when the vehicle collides, the collision energy transmitted in the front-rear direction is first transmitted to the cross beam 11. The cross beam 11 deforms and transmits the collision energy to the reinforcing beam 20 and the longitudinal beams 12. Among them, the longitudinal beams 12 can absorb a part of the collision energy through their own deformation, while the reinforcing beam 20 can absorb most of the collision energy through crush deformation. That is to say, the reinforcing beam 20 in the subframe 100 absorbs most of the collision energy transmitted to the reinforcing beam 20 in the front-rear direction, thereby effectively reducing the collision energy transmitted to the passenger compartment and avoiding serious deformation and solder joint tearing of the vehicle's front bulkhead, and further effectively protecting the structural integrity of the passenger compartment.

[0047] The subframe 100 according to an embodiment of the present invention, by providing a subframe body 10 and a reinforcing beam 20 in the subframe 100, the subframe body 10 includes two cross beams 11 and two longitudinal beams 12. The two cross beams 11 extend along a first direction and are arranged at intervals in a second direction, the first direction intersects with the second direction. The two longitudinal beams 12 extend along the second direction and are arranged at intervals in the first direction. The two ends of the two longitudinal beams 12 in the second direction are respectively connected to the two cross beams 11. The reinforcing beam 20 is arranged between the two longitudinal beams 12 and extends along the second direction. The two ends of the reinforcing beam 20 in the second direction are respectively connected to the two cross beams 11. When a vehicle collides, the reinforcing beam 20 of the subframe 100 can effectively absorb the collision energy through crushing deformation, thereby reducing the deformation of the occupant compartment, ensuring the structural integrity of the occupant compartment, and further effectively improving the safety and reliability of the vehicle.

[0048] Preferably, the subframe body 10 can be made of aluminum alloy material. It should be noted that aluminum alloy is an alloy material based on aluminum and added with one or more alloy elements. By adding different alloy elements, the mechanical properties of aluminum can be significantly improved, such as increasing strength, hardness and durability, while maintaining its advantages of light weight and corrosion resistance. Generally speaking, aluminum alloy has the advantages of high specific strength, light weight, low cost, easy processing, corrosion resistance and recyclability.

[0049] Preferably, the subframe body 10 can be manufactured by an aluminum alloy material extrusion molding process. The aluminum alloy material extrusion molding process is a processing technology in which a metal blank with a solid or hollow cross-sectional shape is extruded through a mold under high temperature and high pressure conditions. It has the advantages of simple process flow, high production capacity and low mold cost. The subframe body 10 manufactured by the extrusion molding process has excellent bending resistance and rigidity.

[0050] In an embodiment of the present invention, as Figures 1 - 3 shown, the two cross beams 11 are respectively a first cross beam 111 and a second cross beam 112. The reinforcing beam 20 includes: a first beam section 21 and a plurality of second beam sections 22. The first beam section 21 extends along the second direction and one end is connected to the first cross beam 111. The plurality of second beam sections 22 are all connected between the other end of the first beam section 21 and the second cross beam 112, and the ends of the plurality of second beam sections 22 connected to the second cross beam 112 are arranged at intervals on the second cross beam 112.

[0051] In some specific examples, as Figures 1 - 3As shown, the first cross beam 111, the second cross beam 112 and the two longitudinal beams 12 are hollow beam structures with cavities. This can not only effectively save the material consumption of the subframe main body 10, thus effectively reducing the production cost, but also effectively reduce the structural weight of the subframe main body 10, thereby effectively reducing the load of the subframe 100, which in turn helps to extend the service life of the subframe 100. In addition, the hollow beam structures of the first cross beam 111, the second cross beam 112 and the two longitudinal beams 12 can effectively improve the rigidity and bending resistance of the subframe main body 10, so as to achieve good mechanical properties, and further effectively improve the structural strength of the subframe 100.

[0052] For example, the number of the second beam segments 22 can be two, three, four, five or more than six. In some specific examples, the first beam segment 21 extends in the front-rear direction. The length of the first beam segment 21 in the front-rear direction is 180 mm, and the front end of the first beam segment 21 is welded to the rear side surface of the first cross beam 111 by gas shielded arc welding with carbon dioxide. The front ends of the plurality of second beam segments 22 are connected to the rear end of the first beam segment 21, and the rear ends of the plurality of second beam segments 22 are all welded to the second cross beam 112 by gas shielded arc welding with carbon dioxide, and the rear ends of the plurality of second beam segments 22 are arranged at intervals in the left-right direction on the second cross beam 112.

[0053] When a vehicle collides, the collision energy can be transmitted from the first cross beam 111 to the first beam segment 21, and from the first beam segment 21 to the plurality of second beam segments 22. That is to say, the first beam segment 21 can effectively guide the transmission of the collision energy, and the plurality of second beam segments 22 can effectively disperse the collision energy. The plurality of second beam segments 22 transmit the collision energy to the second cross beam 112 to further disperse the collision energy.

[0054] In this embodiment, by arranging the first beam segment 21 and the plurality of second beam segments 22 in the reinforcing beam 20, the first beam segment 21 extends in the second direction and one end thereof is connected to the first cross beam 111, the plurality of second beam segments 22 are all connected between the other end of the first beam segment 21 and the second cross beam 112, and the ends of the plurality of second beam segments 22 connected to the second cross beam 112 are arranged at intervals on the second cross beam 112, it can effectively guide the transmission of the collision energy and effectively disperse the collision energy when the vehicle collides, so that the collision energy can be evenly distributed on the structure of the subframe 100, avoiding the concentration of the collision energy of the local structure, and further effectively improving the reliability of the subframe 100.

[0055] In an embodiment of the present invention, as Figures 1 - 3 shown, the second beam segment 22 includes a crush section 221 and a connection section 222 that are sequentially connected in the second direction. The connection section 222 is connected to the side of the crush section 221 facing the second cross beam 112, and the strength of the connection section 222 is greater than that of the crush section 221.

[0056] In some specific examples, such as Figure 3 As shown, the rear end of the collapsible section 221 is connected to the front end of the connecting section 222. That is to say, the collapsible section 221 is located on the front side of the connecting section 222. When a vehicle collides, the first beam section 21 can transfer the collision energy to the collapsible section 221 of the second beam section 22. The collapsible section 221 can effectively absorb the collision energy through its own plastic deformation, and the collision energy not absorbed by the collapsible section 221 can continue to be transferred to the connecting section 222.

[0057] Since the strength of the connecting section 222 is greater than that of the collapsible section 221, the connecting section 222 can effectively absorb the collision energy through its own deformation without being damaged, and transfer the collision energy to the second cross beam 112 to further disperse and absorb the collision energy. That is to say, the connecting section 222 ensures that even after the collapsible section 221 is completely deformed, the reinforcing beam 20 can still maintain a certain rigidity and stability, thus avoiding the overall failure of the reinforcing beam 20 due to excessive deformation.

[0058] In this embodiment, by providing a collapsible section 221 and a connecting section 222 that are sequentially connected in the second direction in the second beam section 22, the connecting section 222 is connected to the side of the collapsible section 221 facing the second cross beam 112, and the strength of the connecting section 222 is greater than that of the collapsible section 221, which can effectively optimize the structural configuration of the reinforcing beam 20, thereby more effectively dispersing and absorbing the collision energy generated during vehicle collision, and avoiding the overall failure of the reinforcing beam 20 caused by excessive deformation, thus effectively improving the reliability of the reinforcing beam 20.

[0059] In an embodiment of the present invention, such as Figures 1 - 3 As shown, a reinforcing rib 2221 extending in the second direction is provided on the connecting section 222.

[0060] In some specific examples, such as Figure 3 As shown, the upper side surface of the connecting section 222 is recessed downward to form a reinforcing rib 2221 extending in the front-rear direction. The reinforcing rib 2221 can increase the local stiffness and strength of the connecting section 222, so that the strength of the connecting section 222 is greater than that of the collapsible section 221, and further the ability of the connecting section 222 to resist deformation is greater than that of the collapsible section 221.

[0061] Thus, when the vehicle collides, it can be ensured that the connecting section 222 will not be damaged prior to the collapsible section 221, which helps to maintain the overall shape of the reinforcing beam 20 and reduce unnecessary deformation. In addition, the reinforcing rib 2221 can effectively absorb the collision energy, thus effectively improving the absorption efficiency of the connecting section 222 for the collision energy.

[0062] In this embodiment, by providing a reinforcing rib 2221 extending along the second direction on the connecting section 222, not only the strength of the connecting section 222 is greater than that of the collapsible section 221, but also the absorption efficiency of the connecting section 222 for collision energy can be effectively improved, thereby reducing the transmission of collision energy to the occupant compartment, and further effectively improving the safety of the occupant compartment.

[0063] In one embodiment of the present invention, as Figures 1 - 3 shown, the number of the second beam sections 22 is two. In the direction from the first cross beam 111 towards the second cross beam 112, the ends of the two second beam sections 22 facing the second cross beam 112 respectively extend obliquely towards the two longitudinal beams 12.

[0064] In some specific examples, as Figures 1 - 3 shown, the front ends of the two second beam sections 22 are connected to the rear end of the first beam section 21. In the front-to-back direction, the rear ends of the two second beam sections 22 respectively extend obliquely towards the two longitudinal beams 12 and are welded to the second cross beam 112, and the rear ends of the two second beam sections 22 are arranged at intervals left and right on the second cross beam 112.

[0065] Thus, when a vehicle collides, the collision energy can be more evenly dispersed to the entire subframe 100 through the two second beam sections 22, avoiding the phenomenon of local concentration of collision energy on the subframe 100, thereby effectively improving the absorption efficiency of the subframe 100 for collision energy and avoiding structural damage caused by local stress concentration. In addition, the obliquely extending second beam sections 22 can provide additional lateral support, thereby enhancing the resistance of the subframe 100 to side impact force.

[0066] In this embodiment, by setting the number of the second beam sections 22 to two, in the direction from the first cross beam 111 towards the second cross beam 112, the ends of the two second beam sections 22 facing the second cross beam 112 respectively extend obliquely towards the two longitudinal beams 12, the collision energy can be evenly dispersed to the subframe 100, thereby effectively improving the absorption efficiency of the subframe 100 for collision energy and avoiding structural damage caused by local stress concentration. In addition, the resistance of the subframe 100 to side impact force can also be effectively enhanced.

[0067] In one embodiment of the present invention, as Figure 1 and Figure 2 shown, two suspension mounting areas 1121 arranged at intervals along the first direction are provided on the second cross beam 112, and the ends of the two second beam sections 22 facing the second cross beam 112 are respectively fixedly connected to the two suspension mounting areas 1121.

[0068] It should be noted that the suspension mounting area 1121 can be used to mount the vehicle's suspension system, such as engine mounts or other related components, to ensure that the engine can be firmly fixed to the subframe 100. Since the suspension mounting area 1121 needs to bear the dynamic and static loads from the engine, the suspension mounting area 1121 usually has high structural strength and rigidity to increase stability and durability.

[0069] In some specific examples, such as Figure 1 and Figure 2 shown, the rear ends of the two second beam segments 22 are respectively welded to the two suspension mounting areas 1121 by gas metal arc welding, so as to effectively utilize the high structural strength and rigidity of the suspension mounting area 1121 itself, thereby effectively enhancing the structural strength and rigidity of the connection part between the second beam segment 22 and the second cross beam 112.

[0070] Thus, when the collision energy is transferred from the second beam segment 22 to the second cross beam 112, due to the high structural strength and rigidity of the suspension mounting area 1121 itself, the suspension mounting area 1121 can effectively absorb and disperse the collision energy without being damaged, avoiding the damage of the second cross beam 112 caused by stress concentration at the connection part between the second beam segment 22 and the second cross beam 112.

[0071] In this embodiment, by fixedly connecting one end of each of the two second beam segments 22 facing the second cross beam 112 to the two suspension mounting areas 1121 respectively, the high structural strength and rigidity of the suspension mounting area 1121 can be effectively utilized, thereby effectively improving the structural strength and rigidity of the connection part between the second beam segment 22 and the second cross beam 112, and further effectively dispersing and absorbing the collision energy, avoiding the damage of the second cross beam 112, so as to effectively improve the reliability and durability of the subframe 100.

[0072] In an embodiment of the present invention, such as Figure 4 shown, the reinforcing beam 20 includes: a reinforcing upper plate 23 and a reinforcing lower plate 24. The reinforcing upper plate 23 and the reinforcing lower plate 24 both extend along the second direction and are butted in the third direction (such as Figure 4 the up and down direction in Figure 4 ), so that the reinforcing beam 20 is formed into a hollow beam structure with a cavity, and the first direction, the second direction and the third direction intersect pairwise. In some specific examples, such as

[0073] In some specific examples, such as Figure 4As shown, the reinforcing upper plate 23 is arranged on the upper side of the reinforcing lower plate 24 and butted in the up-and-down direction. Further, the reinforcing upper plate 23 and the reinforcing lower plate 24 are connected by welding. The materials of the reinforcing upper plate 23 and the reinforcing lower plate 24 are QSTE420 steel, which can not only ensure that the reinforcing beam 20 has sufficient strength, but also enable the reinforcing upper plate 23 and the reinforcing lower plate 24 to have good processing performance.

[0074] The thicknesses of the reinforcing upper plate 23 and the reinforcing lower plate 24 can be obtained by calculating according to the curb weight of the vehicle. For example, when the curb weight of the vehicle is 2.4 tons, the thicknesses of the reinforcing upper plate 23 and the reinforcing lower plate 24 can be 1.5 mm; another example, when the curb weight of the vehicle is 2.1 tons, the thicknesses of the reinforcing upper plate 23 and the reinforcing lower plate 24 can be 1.3 mm.

[0075] In some specific examples, the cross-section of the reinforcing beam 20 formed by the reinforcing upper plate 23 and the reinforcing lower plate 24 is a thin-walled box-shaped cross-section. Thus, it can not only effectively save materials and improve the material utilization rate, but also effectively enhance the structural strength and flexural rigidity of the reinforcing beam 20, and further effectively enhance the stability and reliability of the subframe 100.

[0076] In this embodiment, by arranging the reinforcing upper plate 23 and the reinforcing lower plate 24 in the reinforcing beam 20, both the reinforcing upper plate 23 and the reinforcing lower plate 24 extend along the second direction and are butted in the third direction, so that the reinforcing beam 20 is formed into a hollow beam structure with a cavity, which can not only effectively improve the material utilization rate, but also effectively enhance the structural strength and flexural rigidity of the reinforcing beam 20, and further effectively enhance the stability and reliability of the subframe 100.

[0077] In an embodiment of the present invention, as Figure 4As shown, one of the reinforcing upper plate 23 and the reinforcing lower plate 24 includes: a first plate 231 and a second plate 232. The first plate 231 is a single-piece and includes a first front plate portion 2311 and a first rear plate portion 2312. The first front plate portion 2311 extends in the second direction, and the first rear plate portion 2312 is connected to the side of the first front plate portion 2311 facing the second cross beam 112. The second plate 232 is a single-piece and includes a second front plate portion 2321 and a second rear plate portion 2322. The second front plate portion 2321 extends in the second direction, and the second rear plate portion 2322 is connected to the side of the second front plate portion 2321 facing the second cross beam 112. Wherein, the first front plate portion 2311 and the second front plate portion 2321 are arranged and connected in the first direction. In the direction from the first cross beam 111 towards the second cross beam 112, one end of the first rear plate portion 2312 facing the second cross beam 112 and one end of the second rear plate portion 2322 facing the second cross beam 112 extend away from each other towards the two longitudinal beams 12 respectively, and the first plate 231 and the second plate 232 cooperate to define a cavity that is open on one side in the third direction. The other of the reinforcing upper plate 23 and the reinforcing lower plate 24 covers the open side of the cavity.

[0078] For example, the reinforcing upper plate 23 includes the first plate 231 and the second plate 232, and the first plate 231 and the second plate 232 cooperate to define a cavity that is open downward, and the reinforcing lower plate 24 covers the lower side of the cavity; Another example is that the reinforcing lower plate 24 includes the first plate 231 and the second plate 232, and the first plate 231 and the second plate 232 cooperate to define a cavity that is open upward, and the reinforcing upper plate 23 covers the upper side of the cavity.

[0079] In some specific examples, as Figure 4 shown, the reinforcing upper plate 23 includes the first plate 231 and the second plate 232, and the first plate 231 and the second plate 232 cooperate to define a cavity that is open downward, and the reinforcing lower plate 24 covers the lower side of the cavity. Further, both the first plate 231 and the second plate 232 are made by an integral molding process, so as to effectively ensure the structural strength and integrity of the first plate 231 and the second plate 232.

[0080] The first front plate portion 2311 is arranged on the left side of the second front plate portion 2321, and the first front plate portion 2311 and the second front plate portion 2321 are connected by welding. The first rear plate portion 2312 is connected to the rear side of the first front plate portion 2311, and in the direction from front to back, the rear end of the first rear plate portion 2312 extends towards the left longitudinal beam 12. The second rear plate portion 2322 is connected to the rear side of the second front plate portion 2321, and in the direction from front to back, the rear end of the second rear plate portion 2322 extends towards the right longitudinal beam 12. Thus, the first front plate portion 2311, the second front plate portion 2321, the first rear plate portion 2312 and the second rear plate portion 2322 can jointly form a complete reinforcing upper plate 23.

[0081] In this embodiment, by providing the first plate 231 and the second plate 232 in one of the reinforcing upper plate 23 and the reinforcing lower plate 24, the first plate 231 is an integral part and includes a first front plate portion 2311 and a first rear plate portion 2312. The first front plate portion 2311 extends in the second direction, and the first rear plate portion 2312 is connected to the side of the first front plate portion 2311 facing the second cross beam 112. The second plate 232 is an integral part and includes a second front plate portion 2321 and a second rear plate portion 2322. The second front plate portion 2321 extends in the second direction, and the second rear plate portion 2322 is connected to the side of the second front plate portion 2321 facing the second cross beam 112. Wherein, the first front plate portion 2311 and the second front plate portion 2321 are arranged and connected in the first direction. In the direction from the first cross beam 111 towards the second cross beam 112, one end of the first rear plate portion 2312 facing the second cross beam 112 and one end of the second rear plate portion 2322 facing the second cross beam 112 extend away from each other towards the two longitudinal beams 12 respectively, and the first plate 231 and the second plate 232 cooperate to define a cavity that is open on one side in the third direction. The other of the reinforcing upper plate 23 and the reinforcing lower plate 24 covers the open side of the cavity, which can achieve a split design of the reinforcing upper plate 23 or the reinforcing lower plate 24, thereby effectively reducing the manufacturing and processing difficulty, and further effectively improving the production efficiency. In addition, it can further improve the material utilization rate, reduce the waste of materials in the manufacturing and processing process, and thus effectively reduce the cost.

[0082] In one embodiment of the present invention, as Figure 4 shown, the other of the reinforcing upper plate 23 and the reinforcing lower plate 24 includes: a third plate 241 and a fourth plate 242. The third plate 241 is in the shape of a flat plate and includes a first front plate body 2411 and a first rear plate body 2412 that are connected in the second direction. The third plate 241 covers the open side of the first plate 231 in the third direction. The fourth plate 242 is in the shape of a flat plate and includes a second front plate body 2421 and a second rear plate body 2422 that are connected in the second direction. The fourth plate 242 covers the open side of the second plate 232 in the third direction; wherein, the first front plate portion 2311, the second front plate portion 2321, the first front plate body 2411 and the second front plate body 2421 together form a first beam segment 21, the first rear plate portion 2312 and the first rear plate body 2412 together form one of the second beam segments 22, and the second rear plate portion 2322 and the second rear plate body 2422 together form the other second beam segment 22.

[0083] For example, the reinforcing lower plate 24 includes a third plate 241 and a fourth plate 242. The third plate 241 is disposed on the lower side of the first plate 231, and the fourth plate 242 is disposed on the lower side of the second plate 232. Another example is that the reinforcing upper plate 23 includes a third plate 241 and a fourth plate 242. The third plate 241 is disposed on the upper side of the first plate 231, and the fourth plate 242 is disposed on the upper side of the second plate 232.

[0084] In some specific examples, such as Figure 4 As shown, the reinforcing lower plate 24 includes a third plate 241 and a fourth plate 242. The third plate 241 is disposed on the lower side of the first plate 231, and the fourth plate 242 is disposed on the lower side of the second plate 232. Further, the third plate 241 is connected to the lower side of the first plate 231 by welding, and the fourth plate 242 is connected to the lower side of the second plate 232 by welding.

[0085] The first front plate body 2411 is arranged on the left side of the second front plate body 2421, and the first front plate body 2411 and the second front plate body 2421 are connected by welding. The first rear plate body 2412 is connected to the rear side of the first front plate body 2411, and in the front-to-rear direction, the rear end of the first rear plate body 2412 extends towards the left longitudinal beam 12. The second rear plate body 2422 is connected to the rear side of the second front plate body 2421, and in the front-to-rear direction, the rear end of the second rear plate body 2422 extends towards the right longitudinal beam 12. Thus, the first front plate body 2411, the second front plate body 2421, the first rear plate body 2412, and the second rear plate body 2422 can jointly form a complete reinforcing lower plate 24.

[0086] In addition, the first front plate portion 2311, the second front plate portion 2321, the first front plate body 2411, and the second front plate body 2421 jointly constitute the first beam segment 21. The first rear plate portion 2312 and the first rear plate body 2412 jointly constitute the second beam segment 22 on the left side, and the second rear plate portion 2322 and the second rear plate body 2422 jointly constitute the second beam segment 22 on the right side.

[0087] In this embodiment, by providing a third plate 241 and a fourth plate 242 in one of the reinforcing upper plate 23 and the reinforcing lower plate 24, the third plate 241 is in the shape of a flat plate and includes a first front plate body 2411 and a first rear plate body 2412 connected in the second direction. The third plate 241 covers the open side of the first plate 231 in the third direction. The fourth plate 242 is in the shape of a flat plate and includes a second front plate body 2421 and a second rear plate body 2422 connected in the second direction. The fourth plate 242 covers the open side of the second plate 232 in the third direction. Among them, the first front plate portion 2311, the second front plate portion 2321, the first front plate body 2411 and the second front plate body 2421 together constitute a first beam segment 21. The first rear plate portion 2312 and the first rear plate body 2412 together constitute one of the second beam segments 22. The second rear plate portion 2322 and the second rear plate body 2422 together constitute the other second beam segment 22, which can realize the split design of the reinforcing upper plate 23 or the reinforcing lower plate 24, thereby effectively reducing the manufacturing and processing difficulty, and further effectively improving the production efficiency. In addition, it can further improve the material utilization rate, reduce the waste of materials in the manufacturing and processing process, and thus effectively reduce the cost.

[0088] In an embodiment of the present invention, as Figure 3 and Figure 4 shown, the first front plate portion 2311 and the second front plate portion 2321 are lap-connected in the first direction.

[0089] In some specific examples, as Figure 3 and Figure 4 shown, a lap portion 23211 extending toward the first front plate portion 2311 is provided on the second front plate portion 2321. The lap portion 23211 is arranged on the upper side of the first front plate portion 2311 and is in abutting contact with the first front plate portion 2311. Further, the lap portion 23211 is connected to the first front plate portion 2311 by welding. Thus, the lap portion 23211 can effectively increase the area of the connection region between the first front plate portion 2311 and the second front plate portion 2321, thereby effectively enhancing the connection strength and stiffness between the first front plate portion 2311 and the second front plate portion 2321.

[0090] In this embodiment, by lap-connecting the first front plate portion 2311 and the second front plate portion 2321 in the first direction, the connection strength and stiffness between the first front plate portion 2311 and the second front plate portion 2321 can be effectively enhanced, thereby effectively improving the structural integrity and reliability of the reinforcing beam 20.

[0091] In an embodiment of the present invention, as Figures 1 - 4 shown, a lap edge extending backward is formed on the upper side edge of the rear end of the second beam segment 22. The lap edge extends to the upper surface of the second cross beam 112 and is lap-connected to the second cross beam 112.

[0092] In some specific examples, such as Figure 1 and Figure 3 shown, the overlapping edge includes a first overlapping edge 23121 and a second overlapping edge 23221. The upper side edge of the rear end of the first rear plate portion 2312 forms a first overlapping edge 23121 extending rearward, and the upper side edge of the rear end of the second rear plate portion 2322 forms a second overlapping edge 23221 extending rearward. Both the first overlapping edge 23121 and the second overlapping edge 23221 extend to the upper side surface of two suspension mounting areas 1121 on the second cross beam 112 and are connected by CO2 gas shielded welding. Thus, the first overlapping edge 23121 and the second overlapping edge 23221 can effectively increase the area of the connection region between the rear end of the second beam segment 22 and the second cross beam 112, thereby effectively enhancing the connection strength and stiffness between the rear end of the second beam segment 22 and the second cross beam 112.

[0093] In this embodiment, by forming an overlapping edge extending rearward at the upper side edge of the rear end of the second beam segment 22, and the overlapping edge extends to the upper side surface of the second cross beam 112 and overlaps and is connected to the second cross beam 112, the connection strength and stiffness between the rear end of the second beam segment 22 and the second cross beam 112 can be effectively enhanced, thereby effectively improving the structural integrity and reliability of the subframe 100.

[0094] In an embodiment of the present invention, such as Figure 3 and Figure 4 shown, in the direction from front to back, the overlapping edge extends obliquely upward, and / or, the two side edges of the overlapping edge in the left-right direction are arc-connected to the rear end face of the second beam segment 22.

[0095] For example, in the direction from front to back, the overlapping edge extends obliquely upward; or, the two side edges of the overlapping edge in the left-right direction are arc-connected to the rear end face of the second beam segment 22; or, in the direction from front to back, the overlapping edge extends obliquely upward, and the two side edges of the overlapping edge in the left-right direction are arc-connected to the rear end face of the second beam segment 22.

[0096] In some specific examples, such as Figure 3 and Figure 4 shown, in the direction from front to back, the overlapping edge is arranged to extend obliquely upward, that is to say, the height of the overlapping edge in the up-down direction is higher than that of the second beam segment 22. Thus, the overlapping edge can be overlapped on the upper side surface of the second cross beam 112, and the structural strength and stiffness of the overlapping edge can be effectively increased, so as to better disperse the collision energy. In addition, the two side edges of the overlapping edge in the left-right direction are arc-connected to the rear end face of the second beam segment 22, thereby effectively avoiding the phenomenon of stress concentration, and thus effectively improving the durability and reliability.

[0097] In this embodiment, in the direction from front to back, the overlapping edge is arranged to extend obliquely upward, which can effectively increase the structural strength and stiffness of the overlapping edge, thereby effectively improving the ability of the overlapping edge to absorb and disperse collision energy; by connecting the two side edges of the overlapping edge in the left-right direction to the rear end face of the second beam segment 22 in an arc shape, the phenomenon of stress concentration can be effectively avoided, thereby effectively improving the durability and reliability.

[0098] In one embodiment of the present invention, as Figure 1 and Figure 2 shown, the subframe 100 further includes a mounting beam 30, the mounting beam 30 is arranged below the reinforcing beam 20, the mounting beam 30 extends left and right and its two ends are respectively connected to the two longitudinal beams 12.

[0099] In some specific examples, as Figure 1 and Figure 2 shown, the mounting beam 30 extends along the left-right direction, the left end of the mounting beam 30 is welded to the left longitudinal beam 12, and the right end of the mounting beam 30 is welded to the right longitudinal beam 12. Thus, the mounting beam 30 can be firmly fixed on the subframe 100. The mounting beam 30 can provide additional lateral support for the subframe 100, thereby enhancing the torsional stiffness of the subframe 100. Thus, during the driving of the vehicle, the mounting beam 30 can effectively reduce the possible twisting and deformation of the subframe 100, thereby effectively improving the stability and reliability of the subframe 100.

[0100] Furthermore, the bottom guard plate is installed below the mounting beam 30, which can effectively prevent sundries such as stones, sediment, ice and snow on the road surface from directly hitting or eroding components such as the subframe 100. That is to say, the bottom guard plate provides an additional physical barrier for the subframe 100. Especially under harsh road conditions, it can effectively resist the damage of the external environment to vehicle components, thereby effectively reducing the maintenance cost and frequency.

[0101] In this embodiment, by arranging the mounting beam 30 in the subframe 100, the mounting beam 30 is arranged below the reinforcing beam 20, the mounting beam 30 extends left and right and its two ends are respectively connected to the two longitudinal beams 12, the torsional stiffness of the subframe 100 can be effectively enhanced, thereby effectively improving the stability and reliability of the subframe 100.

[0102] The vehicle according to the second aspect embodiment of the present invention includes the subframe 100 according to the first aspect embodiment of the present invention above, and the subframe 100 is the front subframe 100 of the vehicle. In some specific examples, the vehicle is a rear-wheel drive model. It should be noted that in the rear-wheel drive model, since the front cabin of the vehicle lacks a collision energy absorption structure, when the vehicle collides, especially in a frontal collision, it is easy to cause serious deformation of the vehicle's front apron and tearing of the welding points, resulting in damage to the passenger compartment.

[0103] In the subframe 100 of the present application, a reinforcing beam 20 is provided. Therefore, when a vehicle collides, the subframe 100 can effectively guide the collision energy to be transmitted to the reinforcing beam 20. The reinforcing beam 20 can effectively absorb and disperse the collision energy through its own crushing deformation, and transmit the collision energy to the second cross beam 112 for further absorption and dispersion. That is to say, the reinforcing beam 20 absorbs and disperses the collision energy, thereby reducing the transmission of the collision energy to the occupant compartment, and further effectively protecting the structural integrity and safety of the occupant compartment.

[0104] In the vehicle according to the embodiment of the present invention, by providing the subframe 100 of the above first aspect, when the vehicle collides, the reinforcing beam 20 of the subframe 100 can effectively absorb the collision energy through crushing deformation, thereby reducing the deformation of the occupant compartment, ensuring the structural integrity of the occupant compartment, and further effectively improving the safety and reliability of the vehicle.

[0105] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the 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 therefore cannot be understood as a limitation of the present invention.

[0106] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0107] In the present invention, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between 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 specific circumstances.

[0108] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0109] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A subframe, characterized in that, Comprising: A subframe body, the subframe body includes two crossbeams and two longitudinal beams. The two crossbeams extend along a first direction and are arranged at intervals in a second direction. The first direction intersects the second direction. The two longitudinal beams extend along the second direction and are arranged at intervals in the first direction. The two longitudinal beams are respectively connected to the two crossbeams at both ends in the second direction. A reinforcing beam, the reinforcing beam is arranged between the two longitudinal beams and extends along the second direction. The two ends of the reinforcing beam in the second direction are respectively connected to the two crossbeams.

2. The subframe according to claim 1, characterized in that, The two crossbeams are respectively a first crossbeam and a second crossbeam. The reinforcing beam includes: a first beam segment and a plurality of second beam segments. The first beam segment extends along the second direction and one end is connected to the first crossbeam. The plurality of second beam segments are all connected between the other end of the first beam segment and the second crossbeam, and the ends of the plurality of second beam segments connected to the second crossbeam are arranged at intervals on the second crossbeam.

3. The subframe according to claim 2, characterized in that, The second beam segment includes a collapsible segment and a connecting segment that are sequentially connected in the second direction. The connecting segment is connected to the side of the collapsible segment facing the second crossbeam, and the strength of the connecting segment is greater than the strength of the collapsible segment.

4. The subframe according to claim 3, characterized in that, Reinforcing ribs extending along the second direction are provided on the connecting segment.

5. The subframe according to claim 2, characterized in that The number of the second beam segments is two. In the direction from the first crossbeam towards the second crossbeam, the ends of the two second beam segments facing the second crossbeam respectively extend obliquely towards the two longitudinal beams.

6. The subframe according to claim 5, characterized in that, Two suspension mounting areas arranged at intervals along the first direction are provided on the second crossbeam. The ends of the two second beam segments facing the second crossbeam are respectively fixedly connected to the two suspension mounting areas.

7. The subframe according to claim 5, characterized in that, The reinforcing beam includes: a reinforcing upper plate and a reinforcing lower plate. The reinforcing upper plate and the reinforcing lower plate both extend along the second direction and are butted in a third direction, so that the reinforcing beam forms a hollow beam structure with a cavity. The first direction, the second direction, and the third direction intersect pairwise.

8. The subframe according to claim 7, characterized in that, One of the reinforcing upper plate and the reinforcing lower plate includes: A first plate, the first plate is an integral part and includes a first front plate portion and a first rear plate portion. The first front plate portion extends along the second direction, and the first rear plate portion is connected to the side of the first front plate portion facing the second crossbeam. A second plate, the second plate is an integral part and includes a second front plate portion and a second rear plate portion. The second front plate portion extends along the second direction, and the second rear plate portion is connected to the side of the second front plate portion facing the second crossbeam. Wherein, the first front plate portion and the second front plate portion are arranged and connected in the first direction. In the direction from the first crossbeam towards the second crossbeam, the ends of the first rear plate portion and the second rear plate portion facing the second crossbeam respectively extend away from each other towards the two longitudinal beams, and the first plate and the second plate cooperate to define the cavity that is open on one side in the third direction. The other of the reinforcing upper plate and the reinforcing lower plate covers the open side of the cavity.

9. The subframe according to claim 8, characterized in that, The other one of the reinforcing upper plate and the reinforcing lower plate includes: A third plate, which is in the shape of a flat plate and includes a first front plate body and a first rear plate body connected in the second direction, and the third plate covers the open side of the first plate in the third direction; A fourth plate, which is in the shape of a flat plate and includes a second front plate body and a second rear plate body connected in the second direction, and the fourth plate covers the open side of the second plate in the third direction; Wherein, the first front plate portion, the second front plate portion, the first front plate body and the second front plate body together constitute the first beam segment, the first rear plate portion and the first rear plate body together constitute one of the second beam segments, and the second rear plate portion and the second rear plate body together constitute the other second beam segment.

10. A vehicle, characterized in that, Comprising a subframe according to any one of claims 1-9, the subframe being a front subframe of the vehicle.

Images