Front subframe and vehicle

Abstract

Disclosed in the present application are a front subframe and a vehicle. The front subframe comprises: two longitudinal beams (100), wherein each longitudinal beam (100) is arranged in the front-rear direction of a vehicle and is provided with a first connection part (110), a second connection part (120) and a third connection part (130) connected to a vehicle body, and the peripheries of the first, second and third connection parts are respectively provided with a plurality of first reinforcing ribs (111), second reinforcing ribs (121) and third reinforcing ribs (131) which extend outwards; and a front cross member (200) and a rear cross member (300) arranged in the left-right direction of the vehicle, both ends of said two cross members being respectively connected to the two longitudinal beams (100), the rear cross member (300) being located behind the front cross member (200), the two first connection parts (110) being respectively arranged on the left side and the right side of the front cross member (200), the two second connection parts (120) being respectively arranged on the left side and the right side of the rear cross member (300), and the third connection parts (130) being arranged at the rear ends of the longitudinal beams (100).

Description

Front subframe and vehicle

[0001]

[0002] Cross-reference to related applications

[0003] This application is based on and claims priority to Chinese Patent Application No. 202411346511.9, filed on September 26, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0004] The present application relates to the technical field of vehicles, in particular to a front subframe and a vehicle. BACKGROUND

[0005] The subframe is mainly used to isolate vibration and noise and ensure the effective connection of various components of the suspension system, so it needs to ensure good modal and sufficient strength. The layout of the front suspension system of the fuel vehicle also needs to consider the space occupation of the engine. Therefore, the front subframe, as a transition connecting piece of the steering gear, stabilizer bar, control arm, engine suspension, vehicle body, wheel edge and other devices, also needs to be connected with the vehicle body, and the structural strength of the front subframe is related to the safety of the vehicle. The vehicle also needs to consider lightweight design, improve the structural strength of the front subframe and control the weight of the front subframe, and the key lies in how to optimize the local structure design and space arrangement of the front subframe. SUMMARY

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a front subframe which can increase the front and rear span of the connection between the front subframe and the vehicle body, effectively disperse the overall stress of the front subframe, improve the stiffness of the front subframe carrying the vehicle body, and attenuate the adverse vibration generated by the powertrain of the vehicle and transmitted to the vehicle body, thereby improving the modal and strength.

[0007] According to the front subframe of the first aspect of the present application, the front subframe is used to connect the vehicle body and the suspension system, and the front subframe comprises:

[0008] Two longitudinal beams, each of which is arranged in the front-rear direction of the vehicle, each of which is provided with a first connecting portion, a second connecting portion and a third connecting portion, the periphery of the first connecting portion is provided with a plurality of first reinforcing ribs extending outward, the periphery of the second connecting portion is provided with a plurality of second reinforcing ribs extending outward, and the periphery of the third connecting portion is provided with a third reinforcing rib extending outward, and the first connecting portion, the second connecting portion and the third connecting portion are connected with the vehicle body;

[0009] A front cross beam is arranged in the left-right direction of the vehicle, and the two ends of the front cross beam are respectively connected to two longitudinal beams;

[0010] a rear cross beam arranged along the left-right direction of the vehicle, two ends of the rear cross beam being connected to the two longitudinal beams respectively, the rear cross beam being located behind the front cross beam;

[0011] The two first connecting portions are arranged on the left and right sides of the front cross beam along the left-right direction of the vehicle, the two second connecting portions are arranged on the left and right sides of the rear cross beam along the left-right direction of the vehicle, and the third connecting portion is arranged at the rear end of the longitudinal beam.

[0012] The front subframe according to the embodiments of the present application has at least the following beneficial effects: the vehicle body is connected to the first connecting portion, the second connecting portion and the third connecting portion of the longitudinal beam, the two first connecting portions are arranged on the left and right sides of the front cross beam respectively, the two second connecting portions are arranged on the left and right sides of the rear cross beam respectively, and the third connecting portion is arranged at the rear end of the longitudinal beam. The rigidity of the two first connecting portions is increased by the front cross beam, the rigidity of the two second connecting portions is increased by the rear cross beam, the front-rear span of the connection between the front subframe and the vehicle body is increased by the first connecting portion, the second connecting portion and the third connecting portion, the overall stress of the front subframe is effectively dispersed, the first reinforcing rib is arranged on the periphery of the first connecting portion, the second reinforcing rib is arranged on the periphery of the second connecting portion, and the third reinforcing rib is arranged on the periphery of the third connecting portion. The first reinforcing rib helps to improve the connection rigidity of the first connecting portion and the position adjacent thereto, the second reinforcing rib improves the connection rigidity of the second connecting portion and the position adjacent thereto, and the third reinforcing rib improves the connection rigidity of the third connecting portion and the position adjacent thereto. The rigidity of the front subframe for bearing the vehicle body is improved, the adverse vibration generated by the power assembly of the vehicle and transmitted to the vehicle body is attenuated, and thus the modal and the strength are improved.

[0013] According to some embodiments of the present application, the bottom of each longitudinal beam is provided with a first cavity, a second cavity and a third cavity distributed from front to back at intervals, the first connecting portion is arranged in the first cavity and connected to the top of the longitudinal beam, the second connecting portion is arranged in the second cavity and connected to the top of the longitudinal beam, and the third connecting portion is arranged at the rear side of the third cavity.

[0014] According to some embodiments of the present application, one end of the front cross beam is connected to the left side wall or the right side wall of the first cavity, and one end of the rear cross beam is connected to the rear side wall of the second cavity and the front side wall of the third cavity.

[0015] According to some embodiments of the present application, the third reinforcing rib is arranged along the direction of the third connecting portion towards the front side and connected to the rear cross beam.

[0016] According to some embodiments of the present application, the suspension system comprises a first control arm, a second control arm and a stabilizer bar, the longitudinal beam is provided with a fourth connecting part, a fifth connecting part and a sixth connecting part, the fourth connecting part is arranged in the first cavity and connected with the first control arm, the fifth connecting part is arranged between the first cavity and the second cavity and connected with the second control arm, and the sixth connecting part is arranged in the second cavity and connected with the stabilizer bar.

[0017] According to some embodiments of the present application, at least a part of the fourth connecting part is arranged on the side wall of the first cavity, the fifth connecting part is arranged on the rear side wall of the first cavity and / or the front side wall of the second cavity, and at least one second reinforcing rib is connected with the sixth connecting part.

[0018] According to some embodiments of the present application, each longitudinal beam is further provided with a connecting block arranged between the first cavity and the second cavity, and the front subframe further comprises:

[0019] a middle cross beam arranged along the left-right direction of the vehicle, two ends of the middle cross beam are respectively connected with two connecting blocks.

[0020] According to some embodiments of the present application, the vehicle further comprises a steering gear, the longitudinal beam is provided with a seventh connecting part arranged in the first cavity and connected with the steering gear.

[0021] According to some embodiments of the present application, the first reinforcing rib is connected with the side wall of the first cavity, the second reinforcing rib is connected with the side wall of the second cavity, and the third reinforcing rib is connected with the side wall of the third cavity.

[0022] According to some embodiments of the present application, the vehicle further comprises an engine front suspension and an engine rear suspension, the top of the longitudinal beam is provided with an eighth connecting part located at the front end of the longitudinal beam, the eighth connecting part is connected with the engine front suspension, the top of the rear cross beam is provided with a ninth connecting part connected with the engine rear suspension.

[0023] According to some embodiments of the present application, the eighth connecting part comprises a transverse connecting column and a vertical connecting column, the transverse connecting column extends along the left-right direction of the vehicle, the vertical connecting column extends along the up-down direction of the vehicle, the transverse connecting column is connected with the left side or the right side of the engine front suspension, and the vertical connecting column is connected with the bottom of the engine front suspension.

[0024] According to some embodiments of the present application, the ninth connecting part comprises a longitudinal connecting hole and a vertical connecting hole, the longitudinal connecting hole extends along the front-rear direction of the vehicle, the vertical connecting hole extends along the up-down direction of the vehicle, the longitudinal connecting hole connects the rear side of the rear suspension of the engine, and / or the vertical connecting hole connects the bottom of the rear suspension of the engine.

[0025] According to some embodiments of the present application, the front subframe further comprises:

[0026] a front end of the longitudinal beam is connected with a crash frame, the crash frame is provided with an energy absorption box arranged along the front-rear direction of the vehicle;

[0027] a lower cross beam connected to the energy absorption box, the lower cross beam extends downward.

[0028] According to some embodiments of the present application, the front end of the longitudinal beam and the crash frame are detachably connected.

[0029] According to some embodiments of the present application, the vehicle of the second aspect comprises:

[0030] a vehicle body;

[0031] a suspension system;

[0032] a front subframe as described in the above embodiments, the front subframe connects the vehicle body and the suspension system.

[0033] Since the vehicle adopts all the technical solutions of the front subframe of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0034] Other features and advantages of the present application will be described in the following description, and some will become apparent from the description, or will be understood by those skilled in the art through implementation of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 is a structural schematic diagram of a front subframe according to an embodiment of the present application;

[0036] Fig. 2 is a structural schematic diagram of the front subframe according to an embodiment of the present application, in which the front cross beam and the middle cross beam are detached;

[0037] Fig. 3 is a structural schematic diagram of the front subframe according to an embodiment of the present application, in which the front cross beam and the middle cross beam are detached from another angle;

[0038] Fig. 4 is an exploded schematic diagram of the front subframe according to an embodiment of the present application;

[0039] Fig. 5 is a structural schematic diagram of the front subframe according to an embodiment of the present application, in which the crash frame is detached.

[0040] Reference signs: longitudinal beam 100, first concave cavity 101, second concave cavity 102, third concave cavity 103, connecting block 104, first connecting part 110, first reinforcing rib 111, second connecting part 120, second reinforcing rib 121, third connecting part 130, third reinforcing rib 131, fourth connecting part 140, fifth connecting part 150, sixth connecting part 160, seventh connecting part 170, eighth connecting part 180, transverse connecting column 181, vertical connecting column 182, ninth connecting part 190, longitudinal connecting hole 191, vertical connecting hole 192, front cross beam 200, rear cross beam 300, middle cross beam 400, anti-collision frame 500, energy absorption box 510, lower cross beam 600. Embodiments of the present application

[0041] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent 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, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0042] In the description of the present application, it is understood that the orientation or positional relationship indicated by the terms front, rear, upper, lower, axial, circumferential, etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0043] In the description of the present application, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, and above, below, etc. is understood to include the number. If it is described that the first, second is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0044] In the description of the present application, it should be noted that the words such as setting, mounting, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0045] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0046] In the related art, the auxiliary frame is used to support the vehicle body and the suspension system of the vehicle, and functions to block vibration and noise and reduce the direct entry of the vibration and noise into the vehicle cabin. For a fuel vehicle, the front auxiliary frame also needs to consider the space occupation of the engine. Common auxiliary frames on the market can be roughly divided into two categories of steel plate stamping and welding auxiliary frames and cast aluminum formed auxiliary frames according to materials and manufacturing processes.

[0047] The steel plate stamping and welding auxiliary frame mainly has a single steel plate auxiliary frame and a frame type auxiliary frame according to a structure form.

[0048] The single steel plate auxiliary frame is most commonly a ingot beam structure, and is the earliest auxiliary frame structure design form when a vehicle transits from a load-bearing vehicle body to a non-load-bearing vehicle body. The single steel plate auxiliary frame independently connects the suspension system to the vehicle body, so that each component of the suspension system can be assembled into a large assembly first, and then connected to the vehicle body. This design obviously increases the flexibility of the design of each component of the suspension system, and provides multiple possibilities for the arrangement of surrounding parts; however, due to the relatively compact structure, the connection and cooperation of all components of the suspension system cannot be considered.

[0049] The frame type auxiliary frame is formed by connecting a single plate and a steel pipe or welding an upper plate and a lower plate, and expands the space arrangement range of the vehicle front suspension system component installation on the basis of the ingot beam, and more effectively realizes the independent assembly of the suspension system. At the same time, the frame type structure lengthens the longitudinal span of the auxiliary frame, and then disperses the vibration transmission and stress of the vehicle body connection and the suspension system bearing, and thus is beneficial to optimizing the modal, improving the system stiffness and strength; however, this structure also increases the cost of the auxiliary frame.

[0050] Regardless of the single plate structure or the frame structure, the steel plate auxiliary frame inevitably has disadvantages such as high cost and large weight due to the limitation of the material properties, and is not conducive to lightweight. In addition, due to the relatively compact structure of the steel plate stamping and welding auxiliary frame, the connection of each component of the suspension system cannot be well coordinated, the assembly of the suspension system, the vehicle body and the wheel edge is restricted, and the improvement of the vehicle handling stability is limited to a certain extent.

[0051] The cast aluminum formed auxiliary frame is divided into a common cast aluminum formed auxiliary frame and a hollow cast aluminum auxiliary frame according to whether there is a sand core in the manufacturing process.

[0052] The common cast aluminum formed auxiliary frame is generally integrally formed by a convex die and a concave die through gravity, differential pressure and high pressure casting methods. The design of the cast aluminum auxiliary frame increases the fault tolerance of the connection of the suspension system components, is beneficial to coordinating the cooperative work of each part of the suspension system, and thus improves the performance of the suspension system.

[0053] The hollow cast aluminum auxiliary frame is generally formed by upper and lower dies and a middle sand core, and increases the processes of sand core manufacturing in the early stage and sand discharging in the later stage, and thus prolongs the manufacturing cycle and increases the cost.

[0054] In general, the cast aluminum formed sub-frame is more conducive to lightweight, lower cost, and higher design flexibility, can provide suitable mounting hole positions for the arrangement of various parts of the suspension, and can improve the overall modal, stiffness and strength of the suspension system through optimization of the local structure design.

[0055] The front sub-frame needs to be connected with the vehicle body, and the structural strength of the front sub-frame relates to the safety of the vehicle. The vehicle also needs to consider lightweight design, improve the structural strength of the front sub-frame, and control the weight of the front sub-frame. The key lies in how to optimize the local structure design and spatial arrangement of the front sub-frame.

[0056] Based on this, the embodiment of the application provides a front sub-frame, which can increase the front-rear span of the connection between the front sub-frame and the vehicle body, effectively disperse the overall stress of the front sub-frame, improve the stiffness of the front sub-frame for carrying the vehicle body, and attenuate the adverse vibration generated by the power assembly of the vehicle and transmitted to the vehicle body, thereby improving the modal and strength.

[0057] The front sub-frame according to the embodiment of the application is described with reference to FIGS. 1-5, which is used to connect the vehicle body and the suspension system of the vehicle.

[0058] Referring to FIGS. 1, 2, 4 and 5, the front sub-frame includes two longitudinal beams 100, a front cross beam 200 and a rear cross beam 300.

[0059] The front-rear direction of the front sub-frame is taken as the front-rear direction of the vehicle, and the left-right direction of the front sub-frame is taken as the left-right direction of the vehicle. The two longitudinal beams 100 are arranged opposite to each other, each longitudinal beam 100 extends in the front-rear direction, the front cross beam 200 extends in the left-right direction, the left and right ends of the front cross beam 200 are respectively connected to the front ends of the two longitudinal beams 100, the rear cross beam 300 extends in the left-right direction, the left and right ends of the rear cross beam 300 are respectively connected to the rear positions of the middle portions of the two longitudinal beams 100, and the rear cross beam 300 is arranged behind the front cross beam 200.

[0060] The front end of each longitudinal beam 100 is provided with a first connecting portion 110, the first connecting portions 110 of the two longitudinal beams 100 are respectively arranged on the left and right sides of the front cross beam 200, the rear position of the middle portion of each longitudinal beam 100 is provided with a second connecting portion 120, the second connecting portion 120 is located behind the first connecting portion 110, the second connecting portions 120 of the two longitudinal beams 100 are respectively arranged on the left and right sides of the rear cross beam 300, and the rear end of each longitudinal beam 100 is provided with a third connecting portion 130, the third connecting portion 130 is located behind the second connecting portion 120.

[0061] Referring to FIG. 2, the periphery of each first connecting portion 110 is provided with a plurality of first reinforcing ribs 111 extending outward from the first connecting portion 110 along the outer wall of the longitudinal beam 100, the periphery of each second connecting portion 120 is provided with a plurality of second reinforcing ribs 121 extending outward from the second connecting portion 120 along the outer wall of the longitudinal beam 100, and the periphery of each third connecting portion 130 is provided with a third reinforcing rib 131 extending outward from the third connecting portion 130 along the outer wall of the longitudinal beam 100.

[0062] The body is connected to the first connecting portions 110, the second connecting portions 120, and the third connecting portions 130 of the longitudinal beams 100, the two first connecting portions 110 are respectively arranged on the left side and the right side of the front cross beam 200, the two second connecting portions 120 are respectively arranged on the left side and the right side of the rear cross beam 300, and the third connecting portion 130 is arranged at the rear end of the longitudinal beam 100. The rigidity of the two first connecting portions 110 is increased by the front cross beam 200, the rigidity of the two second connecting portions 120 is increased by the rear cross beam 300, and the front and rear spans of the front subframe connected to the body are increased by the first connecting portions 110, the second connecting portions 120, and the third connecting portions 130, thereby effectively dispersing the overall stress of the front subframe.

[0063] In addition, the first reinforcing ribs 111 are arranged on the periphery of the first connecting portions 110, the second reinforcing ribs 121 are arranged on the periphery of the second connecting portions 120, and the third reinforcing ribs 131 are arranged on the periphery of the third connecting portions 130. The first reinforcing ribs 111 help to improve the connection strength of the first connecting portions 110 and the positions adjacent thereto, the second reinforcing ribs 121 help to improve the connection rigidity of the second connecting portions 120 and the positions adjacent thereto, and the third reinforcing ribs 131 help to improve the connection rigidity of the third connecting portions 130 and the positions adjacent thereto. This helps to improve the rigidity of the front subframe carrying the body and attenuate the undesirable vibration generated by the powertrain of the vehicle and transmitted to the body, thereby improving the modal and strength.

[0064] In some embodiments, referring to FIG. 2, the bottom of each longitudinal beam 100 is provided with a first recessed cavity 101 located at the front side of the longitudinal beam 100, the first connecting portion 110 is arranged in the first recessed cavity 101, the first connecting portion 110 extends from the bottom to the top of the longitudinal beam 100, and all the first reinforcing ribs 111 are arranged in the first recessed cavity 101.

[0065] The bottom of each longitudinal beam 100 is also provided with a second recessed cavity 102 located at a position rearward of the middle of the longitudinal beam 100, the first recessed cavity 101 is separated from the second recessed cavity 102 front and rear, the second connecting portion 120 is arranged in the second recessed cavity 102, the second connecting portion 120 extends from the bottom to the top of the longitudinal beam 100, and all the second reinforcing ribs 121 are arranged in the second recessed cavity 102.

[0066] The bottom of each longitudinal beam 100 is further provided with a third cavity 103, which is located at the rear side of the longitudinal beam 100, the second cavity 102 and the third cavity 103 are separated front and back, the third connecting part 130 is arranged on the rear side wall of the third cavity 103, and the third reinforcing rib 131 is arranged in the third cavity 103.

[0067] By forming the first cavity 101, the second cavity 102 and the third cavity 103 at the bottom of the longitudinal beam 100, the weight of the longitudinal beam 100 is reduced, and the lightweight of the longitudinal beam 100 is realized.

[0068] In addition, the stiffness of the first cavity 101 and the first connecting part 110 is increased by the first reinforcing rib 111, the stiffness of the second cavity 102 and the second connecting part 120 is increased by the second reinforcing rib 121, and the stiffness of the third cavity 103 and the third connecting part 130 is increased by the third reinforcing rib 131, which helps to improve the overall stiffness of the longitudinal beam 100.

[0069] In some embodiments, as shown in FIG. 2, the left and right ends of the front cross beam 200 are respectively connected to the side walls of the first cavities 101 of the two longitudinal beams 100, the rear side walls of the second cavities 102 of the two longitudinal beams 100 are connected to the front sides of the left and right ends of the rear cross beam 300, and the front side walls of the third cavities 103 of the two longitudinal beams 100 are respectively connected to the rear sides of the left and right ends of the rear cross beam 300.

[0070] The left side wall or the right side wall of the first cavity 101 is supported by the front cross beam 200, the first connecting part 110 in the first cavity 101 is used to connect the vehicle body, which helps to maintain the shape of the first cavity 101, the rear side wall of the second cavity 102 and the front side wall of the third cavity 103 are supported by the rear cross beam 300, and the second connecting part 120 in the second cavity 102 is used to connect the vehicle body, which helps to maintain the shape of the second cavity 102 and the shape of the third cavity 103.

[0071] In some embodiments, as shown in FIG. 2, the third reinforcing rib 131 extends forward from the third connecting part 130 along the top wall of the third cavity 103 to the rear cross beam 300.

[0072] The third reinforcing rib 131 is arranged between the third connecting part 130 and the rear cross beam 300, so that the third reinforcing rib 131 passes through the entire third cavity 103 in the front and rear directions, which helps to improve the stiffness of the third cavity 103.

[0073] In some embodiments, the suspension system is provided with a stabilizer bar, a first control arm and a second control arm.

[0074] Referring to FIG. 2, the fourth connecting part 140 is arranged in the first cavity 101 of the longitudinal beam 100, and the fourth connecting part 140 is connected with the first control arm. The fifth connecting part 150 is arranged in the space between the first cavity 101 and the second cavity 102 of the longitudinal beam 100, and the fifth connecting part 150 is connected with the second control arm. The sixth connecting part 160 is arranged in the second cavity 102 of the longitudinal beam 100, and the sixth connecting part 160 is connected with the stabilizer bar.

[0075] Properly distributing the positions of the fourth connecting part 140, the fifth connecting part 150, and the sixth connecting part 160 helps to reduce the space occupied by the above-mentioned parts, and makes the structure of the longitudinal beam 100 more compact.

[0076] In some embodiments, referring to FIG. 2, the fourth connecting part 140 is attached to the side wall of the first cavity 101, the rear side wall of the first cavity 101 and the front side wall of the second cavity 102 serve as part of the fifth connecting part 150, the fifth connecting part 150 connects the second control arm by means of the rear side wall of the first cavity 101 and the front side wall of the second cavity 102, and at least one second reinforcing rib 121 extends from the second connecting part 120 to the sixth connecting part 160.

[0077] The fourth connecting part 140 is supported by the side wall of the first cavity 101, which improves the rigidity of the fourth connecting part 140. The rear side wall of the first cavity 101 and the front side wall of the second cavity 102 improve the rigidity of the fifth connecting part 150. The second reinforcing rib 121 helps to strengthen the rigidity of the sixth connecting part 160.

[0078] In some embodiments, referring to FIGS. 1, 2, 4, and 5, the front subframe is further provided with a middle cross beam 400, the middle cross beam 400 extends in the left-right direction, the bottom of each longitudinal beam 100 is provided with a connecting block 104, the connecting block 104 is arranged between the rear side wall of the first cavity 101 and the front side wall of the second cavity 102, and the two connecting blocks 104 are respectively connected to the left and right ends of the middle cross beam 400.

[0079] The longitudinal beam 100 is provided with the connecting block 104 to connect the middle cross beam 400, and the rigidity between the first cavity 101 and the second cavity 102 of the longitudinal beam 100 is strengthened by means of the middle cross beam 400.

[0080] In some embodiments, referring to FIG. 2, the vehicle is further provided with a steering gear, and the first cavity 101 of the longitudinal beam 100 is provided with a seventh connecting part 170, and the steering gear is connected with the seventh connecting part 170.

[0081] The seventh connecting part 170 is arranged in the first cavity 101 to connect the steering gear of the vehicle, which reduces the volume occupied by the seventh connecting part 170 and makes the longitudinal beam 100 more compact.

[0082] In some embodiments, referring to FIG. 2, the plurality of first reinforcing ribs 111 extend from the first connecting portion 110 along the top wall of the first recessed cavity 101 to the side wall of the first recessed cavity 101, the plurality of second reinforcing ribs 121 extend from the second connecting portion 120 along the top wall of the second recessed cavity 102 to the side wall of the second recessed cavity 102, and the third reinforcing rib 131 extends from the third connecting portion 130 along the top wall of the third recessed cavity 103 to the front side wall of the third recessed cavity 103.

[0083] Further extending the first reinforcing ribs 111, the second reinforcing ribs 121 and the third reinforcing rib 131 helps to improve the rigidity of the first recessed cavity 101, the second recessed cavity 102 and the third recessed cavity 103.

[0084] In some embodiments, the vehicle is further provided with an engine front suspension and an engine rear suspension.

[0085] Referring to FIG. 3 and FIG. 4, the top of the front end of the longitudinal beam 100 is provided with an eighth connecting portion 180, and the top of the rear cross beam 300 is provided with a ninth connecting portion 190. The eighth connecting portion 180 is connected with the engine front suspension, and the ninth connecting portion 190 is connected with the engine rear suspension.

[0086] The front end of the longitudinal beam 100 is supported by the front cross beam 200, and the eighth connecting portion 180 supports the engine front suspension. The engine rear suspension is supported by the rear cross beam 300, thereby improving the rigidity of the front subframe bearing the engine.

[0087] In some embodiments, referring to FIG. 3 and FIG. 4, the eighth connecting portion 180 is provided with a left-right extending transverse connecting column 181 and an up-down extending vertical connecting column 182. The transverse connecting column 181 is connected with the left side or the right side of the engine front suspension, and the vertical connecting column is connected with the bottom of the engine front suspension.

[0088] The engine front suspension can be connected to the eighth connecting portion 180 by the side wall or the bottom wall, which makes the assembly of the engine front suspension to the front subframe more diversified. Fully considering the arrangement of the engine front suspension helps the front subframe to adapt to the transversely or longitudinally arranged engine.

[0089] In some embodiments, referring to FIG. 3 and FIG. 4, the ninth connecting portion 190 is provided with a front-rear extending longitudinal connecting hole 191 and an up-down extending vertical connecting hole 192. The longitudinal connecting hole 191 is connected with the rear side of the engine rear suspension, and the vertical connecting hole 192 is connected with the bottom of the engine rear suspension.

[0090] The engine rear suspension can be connected to the ninth connecting portion 190 by the rear wall or the bottom wall, which makes the assembly of the engine rear suspension to the front subframe more diversified. Fully considering the arrangement of the engine rear suspension helps the front subframe to adapt to the transversely or longitudinally arranged engine.

[0091] The subframe has become the main device for supporting, carrying, connecting the components of the suspension system, ensuring their respective functions and characteristics, and improving the comfort and stability of the vehicle. The development of automobile lightweighting has driven the change of the front subframe design scheme. The structure of the front subframe plays a certain role in protecting the powertrain from damage during the collision process. During the collision, the longitudinal beam 100 of the front subframe collapses to absorb and disperse the collision energy, thereby protecting the remaining components of the suspension system and the powertrain to some extent. In order to fully exert the collision protection function, some front subframes increase the energy-absorbing box or the anti-collision beam structure in the design. However, these design schemes only consider the collapse of the energy-absorbing box caused by the common frontal collision or offset collision, and do not consider the damage of the front subframe or the damage of the powertrain caused by the chassis collision under special road conditions.

[0092] To this end, in some embodiments, referring to FIGS. 1 and 5, the front subframe is further provided with an anti-collision frame 500 and a lower cross beam 600, the lower cross beam 600 extends in the left-right direction, the anti-collision frame 500 is installed at the front end of the longitudinal beam 100, the anti-collision frame 500 is provided with an energy-absorbing box 510, the energy-absorbing box 510 extends in the front-rear direction, the lower cross beam 600 is connected with the energy-absorbing box 510, and the lower cross beam 600 extends below the energy-absorbing box 510.

[0093] The lower cross beam 600 extends below the energy-absorbing box 510, which provides further protection and defense for the powertrain of the vehicle under the chassis collision, especially the chassis misuse working condition. At the same time, the design of the lower cross beam 600 is also conducive to improving the overall stiffness and strength of the assembled anti-collision frame 500 and enhancing the energy-absorbing ability of the energy-absorbing box 510 in the collision.

[0094] In some embodiments, referring to FIGS. 1 and 5, the anti-collision frame 500 is detachably connected to the front end of the longitudinal beam 100.

[0095] The anti-collision frame 500 can be detached from the longitudinal beam 100, which facilitates the after-sales repair and replacement of the anti-collision frame 500 and reduces the maintenance cost.

[0096] Specifically, referring to FIGS. 1 to 5, the front subframe includes two longitudinal beams 100, a front cross beam 200, a rear cross beam 300, a middle cross beam 400, an anti-collision frame 500, and a lower cross beam 600.

[0097] With reference to Figs. 1, 4, and 5, two longitudinal beams 100 are arranged opposite to each other with the front-rear direction of the vehicle as the front-rear direction of the front subframe and the left-right direction of the vehicle as the left-right direction of the front subframe, each longitudinal beam 100 extends in the front-rear direction, a front cross beam 200 extends in the left-right direction, the left and right ends of the front cross beam 200 are connected to the front ends of the two longitudinal beams 100, respectively, a rear cross beam 300 extends in the left-right direction, the left and right ends of the rear cross beam 300 are connected to the rear positions of the middle portions of the two longitudinal beams 100, respectively, and the rear cross beam 300 is arranged behind the front cross beam 200.

[0098] With reference to Fig. 2, a first cavity 101, a second cavity 102, and a third cavity 103 are arranged at the bottom of each longitudinal beam 100.

[0099] The first cavity 101 is arranged at the front side of the longitudinal beam 100, the second cavity 102 is arranged at the rear position of the middle portion of the longitudinal beam 100, and the third cavity 103 is arranged at the rear side of the longitudinal beam 100.

[0100] The left and right ends of the front cross beam 200 are connected to the side walls of the first cavities 101 of the two longitudinal beams 100, respectively, the rear side walls of the second cavities 102 of the two longitudinal beams 100 are connected to the front sides of the left and right ends of the rear cross beam 300, and the front side walls of the third cavities 103 of the two longitudinal beams 100 are connected to the rear sides of the left and right ends of the rear cross beam 300, respectively.

[0101] A connecting block 104 is arranged at the bottom of each longitudinal beam 100, and the connecting block 104 is arranged between the rear side wall of the first cavity 101 and the front side wall of the second cavity 102.

[0102] A middle cross beam 400 extends in the left-right direction, and the left and right ends of the middle cross beam 400 are connected to the two connecting blocks 104, respectively.

[0103] A first connecting portion 110 is arranged in the first cavity 101, and the first connecting portion 110 extends from the bottom to the top of the longitudinal beam 100, a plurality of first reinforcing ribs 111 are arranged at the periphery of each first connecting portion 110, all the first reinforcing ribs 111 are arranged in the first cavity 101, and the plurality of first reinforcing ribs 111 extend from the first connecting portion 110 along the top wall of the first cavity 101 to the side wall of the first cavity 101.

[0104] A second connecting portion 120 is arranged in the second cavity 102, and the second connecting portion 120 extends from the bottom to the top of the longitudinal beam 100, a plurality of second reinforcing ribs 121 are arranged at the periphery of each second connecting portion 120, all the second reinforcing ribs 121 are arranged in the second cavity 102, and the plurality of second reinforcing ribs 121 extend from the second connecting portion 120 along the top wall of the second cavity 102 to the side wall of the second cavity 102.

[0105] The third connecting part 130 is arranged on the rear side wall of the third cavity 103, and the third reinforcing rib 131 is arranged in the third cavity 103 and extends forward from the third connecting part 130 along the top wall of the third cavity 103 to the front side wall of the third cavity 103.

[0106] The first connecting part 110 of each of the two longitudinal beams 100 is arranged on the left or right side of the front cross beam 200, the second connecting part 120 of each of the two longitudinal beams 100 is arranged on the left or right side of the rear cross beam 300, and the third connecting part 130 is arranged at the rear end of the longitudinal beam 100.

[0107] The fourth connecting part 140 is arranged in the first cavity 101 of the longitudinal beam 100 and is attached to the side wall of the first cavity 101, and the fourth connecting part 140 is connected to the first control arm of the suspension system. The fifth connecting part 150 is further arranged at the bottom of the longitudinal beam 100, the rear side wall of the first cavity 101 and the front side wall of the second cavity 102 serve as part of the fifth connecting part 150, the fifth connecting part 150 connects the second control arm by means of the rear side wall of the first cavity 101 and the front side wall of the second cavity 102, and the sixth connecting part 160 is further arranged in the second cavity 102 of the longitudinal beam 100. At least one second reinforcing rib 121 extends from the second connecting part 120 to the sixth connecting part 160, and the sixth connecting part 160 is connected to the stabilizer bar of the suspension system.

[0108] The seventh connecting part 170 is arranged in the first cavity 101 of the longitudinal beam 100, and the steering gear of the vehicle is connected to the seventh connecting part 170.

[0109] Referring to FIGS. 3 and 4, the top of the front end of the longitudinal beam 100 is provided with an eighth connecting part 180, and the top of the rear cross beam 300 is provided with a ninth connecting part 190.

[0110] The eighth connecting part 180 is provided with left and right extending transverse connecting columns 181 and up and down extending vertical connecting columns 182, the transverse connecting columns 181 are connected to the left or right side of the front engine suspension, and the vertical connecting columns are connected to the bottom of the front engine suspension.

[0111] The ninth connecting part 190 is provided with front and rear extending longitudinal connecting holes 191 and up and down extending vertical connecting holes 192, the longitudinal connecting holes 191 are connected to the rear side of the rear engine suspension, and the vertical connecting holes 192 are connected to the bottom of the rear engine suspension.

[0112] Referring to FIGS. 1 and 5, the front subframe is further provided with a crash frame 500 and a lower cross beam 600, the lower cross beam 600 extends in the left and right directions, the crash frame 500 is connected to the front end of the longitudinal beam 100 by bolts, the crash frame 500 is provided with an energy absorption box 510, the energy absorption box 510 extends in the front and rear directions, the lower cross beam 600 is connected to the energy absorption box 510, and the lower cross beam 600 extends below the energy absorption box 510.

[0113] The embodiment of the present application also provides a vehicle comprising the front subframe of the above embodiment.

[0114] The vehicle can be a private car, such as a sedan, an SUV, an MPV or a pickup truck, etc. The vehicle can also be an operating vehicle, such as a van, a bus, a small truck or a large trailer, etc. The vehicle needs to have an electric motor capable of outputting power or storing mechanical energy as a generator. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0115] Since the vehicle applies all the technical solutions of the above front subframe, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0116] The device embodiments described above are only schematic, and units described as separate components can or can not be physically separate, i.e. can be located in one place or distributed over multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment.

Claims

1. A front subframe for connecting a vehicle body and a suspension system of a vehicle, the front subframe comprising: two longitudinal beams each arranged in a front-rear direction of the vehicle, each of the longitudinal beams being provided with a first connecting portion, a second connecting portion, and a third connecting portion, an outer periphery of the first connecting portion being provided with a plurality of first reinforcing ribs extending outward, an outer periphery of the second connecting portion being provided with a plurality of second reinforcing ribs extending outward, an outer periphery of the third connecting portion being provided with a third reinforcing rib extending outward, the first connecting portion, the second connecting portion, and the third connecting portion connecting the vehicle body; a front cross beam arranged in a left-right direction of the vehicle, both ends of the front cross beam being connected to the two longitudinal beams, respectively; a rear cross beam arranged in the left-right direction of the vehicle, both ends of the rear cross beam being connected to the two longitudinal beams, respectively, the rear cross beam being located rearward of the front cross beam; wherein the two first connecting portions are located on both sides of the front cross beam in the left-right direction of the vehicle, the two second connecting portions are located on both sides of the rear cross beam in the left-right direction of the vehicle, and the third connecting portion is located at a rear end of the longitudinal beam.

2. The front subframe of claim 1, wherein, a bottom portion of each of the longitudinal beams is provided with a first cavity, a second cavity, and a third cavity distributed at intervals from front to rear, the first connecting portion is arranged in the first cavity and connected to a top portion of the longitudinal beam, the second connecting portion is arranged in the second cavity and connected to the top portion of the longitudinal beam, and the third connecting portion is arranged at a rear side of the third cavity.

3. The front subframe of claim 2, wherein, one end of the front cross beam is connected to a left side wall or a right side wall of the first cavity, and one end of the rear cross beam is connected to a rear side wall of the second cavity and a front side wall of the third cavity.

4. The front subframe of claim 3, wherein, the third reinforcing rib is arranged in a direction toward a front side of the third connecting portion and connected to the rear cross beam.

5. The front subframe of claim 2, wherein, the suspension system comprises a first control arm, a second control arm, and a stabilizer bar, the longitudinal beam is provided with a fourth connecting portion, a fifth connecting portion, and a sixth connecting portion, the fourth connecting portion is arranged in the first cavity and connected to the first control arm, the fifth connecting portion is arranged between the first cavity and the second cavity and connected to the second control arm, and the sixth connecting portion is arranged in the second cavity and connected to the stabilizer bar.

6. The front subframe of claim 5, wherein, at least a portion of the fourth connecting portion is arranged on a side wall of the first cavity, the fifth connecting portion is arranged on a rear side wall of the first cavity and / or a front side wall of the second cavity, and at least one of the second reinforcing ribs is connected to the sixth connecting portion.

7. The front subframe of claim 2, wherein, each of the longitudinal beams is further provided with a connecting block arranged between the first cavity and the second cavity, and the front subframe further comprises: a middle cross beam arranged in the left-right direction of the vehicle, both ends of the middle cross beam being connected to the two connecting blocks, respectively.

8. The front subframe of claim 2, wherein, the vehicle further comprises a steering gear, and the longitudinal beam is provided with a seventh connecting portion arranged in the first cavity and connected to the steering gear.

9. The front subframe of claim 2, wherein, the first reinforcing ribs are connected to side walls of the first cavity, the second reinforcing ribs are connected to side walls of the second cavity, and the third reinforcing rib is connected to a side wall of the third cavity.

10. The front subframe of claim 1, wherein, The vehicle further comprises a front engine suspension and a rear engine suspension, a top of the longitudinal beam is provided with an eighth connecting part, the eighth connecting part is located at a front end of the longitudinal beam, the eighth connecting part connects the front engine suspension, a top of the rear cross beam is provided with a ninth connecting part, the ninth connecting part connects the rear engine suspension.

11. The front subframe of claim 10, wherein, The eighth connecting part comprises a horizontal connecting column and a vertical connecting column, the horizontal connecting column extends along a left-right direction of the vehicle, the vertical connecting column extends along an up-down direction of the vehicle, the horizontal connecting column connects a left side or a right side of the front engine suspension, and the vertical connecting column connects a bottom of the front engine suspension.

12. The front subframe of claim 10, wherein, The ninth connecting part comprises a longitudinal connecting hole and a vertical connecting hole, the longitudinal connecting hole extends along a front-rear direction of the vehicle, the vertical connecting hole extends along the up-down direction of the vehicle, the longitudinal connecting hole connects a rear side of the rear engine suspension and / or the vertical connecting hole connects a bottom of the rear engine suspension.

13. The front subframe according to claim 1, further comprising: a crash can connected to the front end of the longitudinal beam, the crash can being provided with an energy absorption box arranged along a front-rear direction of the vehicle; a lower cross beam connected to the energy absorption box, the lower cross beam extending downward.

14. The front subframe of claim 13, wherein, The crash can and the front end of the longitudinal beam are detachably connected.

15. A vehicle, comprising: a vehicle body; a suspension system; the front subframe according to any one of claims 1 to 14, the front subframe connecting the vehicle body and the suspension system.

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