CN218577854U

CN218577854U - Front subframe and vehicle

Info

Publication number: CN218577854U
Application number: CN202222519232.0U
Authority: CN
Inventors: 孙福华
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-03-07
Anticipated expiration: 2032-09-22

Abstract

The application discloses a front auxiliary frame and a vehicle, wherein the front auxiliary frame comprises a first cross beam, a second cross beam and two longitudinal beams arranged at intervals; the first cross beam is arranged between the two longitudinal beams, and two ends of the first cross beam are respectively connected with the two longitudinal beams; the second cross beam comprises a suspension installation section and two longitudinal beam connecting sections connected to two ends of the suspension installation section, the suspension installation section protrudes out of the two longitudinal beam connecting sections towards the first cross beam in the second direction, and the end parts, far away from the suspension installation section, of the two longitudinal beam connecting sections are connected with the two longitudinal beams respectively; the longitudinal beams comprise main body sections and two main frame connecting sections respectively connected to two ends of the main body sections, the main body section of any longitudinal beam protrudes out of the two main frame connecting sections towards the main body section of the other longitudinal beam along a first direction, and the main body section protrudes out of the two main frame connecting sections towards the first cross beam along a third direction; the first direction, the second direction and the third direction are mutually vertical. It has better bearing and supporting capacity and fatigue endurance strength.

Description

Front subframe and vehicle

Technical Field

The application relates to the technical field of vehicle frames, in particular to a front auxiliary frame and a vehicle.

Background

In related technical fields, vehicles have developed towards the direction of energy conservation and emission reduction, and auxiliary frames of traditional fuel vehicles and hybrid vehicles are not suitable for hydrogen energy vehicles, so that a front auxiliary frame system with rigidity and modal requirements meeting those of the hydrogen energy vehicles must be designed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a front auxiliary frame and a vehicle, which have better bearing and supporting capacity and fatigue endurance strength.

In a first aspect, an embodiment of the application provides a front subframe, which comprises a first cross beam, a second cross beam and two longitudinal beams arranged at intervals;

the first cross beam is arranged between the two longitudinal beams, two ends of the first cross beam are respectively connected with the two longitudinal beams, and the first cross beam is arranged along a first direction;

the second cross beam comprises a suspension installation section and two longitudinal beam connecting sections connected to two ends of the suspension installation section, the suspension installation section protrudes out of the two longitudinal beam connecting sections towards the first cross beam in the second direction, and the end parts, far away from the suspension installation section, of the two longitudinal beam connecting sections are respectively connected with the two longitudinal beams in a one-to-one correspondence manner;

the longitudinal beams comprise main body sections and two main frame connecting sections which are respectively connected to two ends of the main body sections, the main body section of any one longitudinal beam protrudes out of the two main frame connecting sections towards the main body section of the other longitudinal beam along the first direction, and the main body section protrudes out of the two main frame connecting sections towards the first cross beam along the third direction;

the first direction, the second direction and the third direction are mutually perpendicular.

Based on the front auxiliary frame of the embodiment of the application, the suspension installation section of the second cross beam protrudes out of the connecting sections of the two longitudinal beams towards the first cross beam along the second direction, so that the second cross beam forms a trapezoidal structure; simultaneously, the main part section of longeron is along first direction and the equal protrusion of third direction in two main frame linkage segments settings to make the longeron constitute trapezium structure on first direction and third direction, trapezoidal stability is relevant with the length relation of going to the bottom, when the bottom is close to zero gradually, whole trapezoidal is close to triangle-shaped gradually, trapezoidal just more and more has stability this moment, consequently, the preceding sub vehicle frame of this application has better stability, and then has improved the bearing support ability and the fatigue endurance strength of this preceding sub vehicle frame.

In some embodiments of the present application, in the first direction and the third direction, the main frame connecting section extends from an end away from the main body section to an end connected to the main body section toward the first cross member, and the extending direction of the main frame connecting section has both a component in the first direction and a component in the third direction.

Based on above-mentioned embodiment, main frame linkage segment extends the back to first crossbeam along first direction and third direction from the one end of keeping away from the main part section to the one end of being connected with the main part section for the main part section all protrudes in main frame linkage segment along first direction and third direction, has realized promptly that the longeron is the setting of trapezium structure.

In some embodiments of the present application, the main frame connecting section is disposed in an arc shape along both the first direction and the third direction.

Based on above-mentioned embodiment, curved main frame linkage segment can make stress distribute comparatively evenly on main frame linkage segment, and curved main frame can be level and smooth transition to main body section, and main frame linkage segment and main body section's junction do not all have the buckling promptly, all there is not stress concentration point at main frame linkage segment and main frame linkage segment's junction, so, realized promptly that main body section has guaranteed the structural strength of longeron again along first direction and third direction protrusion in main frame linkage segment.

In some embodiments of the present application, the stringer connecting section is connected to the main body section at a middle position in the second direction.

Based on the above embodiment, after the ends of the two main frame connecting sections, which are far away from the main body section, are connected with the main frame, the middle position of the main body section along the second direction is the weakest point of the rigidity of the longitudinal beam, and at this time, after the longitudinal beam connecting sections and the main body section are connected at the middle position of the second direction, the second cross beam supports the middle position of the main body section, so as to strengthen the structural strength of the front auxiliary vehicle.

In some embodiments of the present application, the first cross member is connected to a junction of the main body section and the main frame connection section.

Based on above-mentioned embodiment, the buckling parts of main body section and main frame linkage segment have been strengthened after first crossbeam is connected with the junction of main body section and main frame linkage segment, have improved this preceding sub vehicle frame's structural strength.

In some embodiments of the present application, the longitudinal beam connecting section has an axis that is disposed at an angle of 50 ° to the axis of the main body section.

Based on the above embodiment, this angular design firstly can the furthest improve the rigidity and the mode of second crossbeam, secondly can be more excellent strengthen the left and right longerons, improve the rigidity and the mode of whole sub vehicle frame.

In some embodiments of the present application, the front subframe further comprises:

the first reinforcing plate is connected with the main body section and one side, close to the arc-shaped section, of the longitudinal beam connecting section in the third direction;

the second reinforcing plate is connected with the main body section and one side, far away from the arc-shaped section, of the longitudinal beam connecting section in the third direction;

the third reinforcing plate is connected with the first reinforcing plate, the second reinforcing plate and the side close to each other of the main body section and the longitudinal beam connecting section, and a cavity is defined by the first reinforcing plate, the second reinforcing plate and the third reinforcing plate;

the fourth reinforcing plate is connected with the longitudinal beam connecting section and the main body section;

and the fifth reinforcing plate is connected with the second cross beam and the main frame connecting section.

Based on the embodiment, the first reinforcing plate, the second reinforcing plate, the third reinforcing plate and the fourth reinforcing plate are respectively connected with the main body section and the longitudinal beam connecting section and then used for reinforcing the connecting strength between the main body section and the longitudinal beam connecting section, the fifth reinforcing plate is connected with the second cross beam and the longitudinal beam and then used for reinforcing the connecting strength between the second cross beam and the longitudinal beam, and meanwhile, the first reinforcing plate, the second reinforcing plate, the third reinforcing plate, the fourth reinforcing plate and the fifth reinforcing plate can reinforce the structural strength and the mode of the front subframe, so that the bearing support capacity and the fatigue endurance strength of the front subframe are improved; and after the third reinforcing plate, the first reinforcing plate and the second reinforcing plate enclose a cavity, the first reinforcing plate, the second reinforcing plate and the third reinforcing plate are mutually supported, so that the structural stability of the front auxiliary frame is further improved.

In some embodiments of the present application, the longitudinal beam, the first cross beam and the second cross beam are all provided as tubular structures, the wall thickness of the longitudinal beam is 34mm, the wall thickness of the first cross beam is 19mm, and the wall thickness of the second cross beam is 31mm.

Based on the above embodiment, tubular longeron, first crossbeam and second crossbeam make whole front subframe have higher bending rigidity, and the tubular structure of crossbeam and longeron can play very big buffering energy-absorbing effect at the collision in-process, has higher factor of safety concurrently.

In some embodiments of the present application, each of the suspension installation section and the longitudinal beam connection section includes a first flat plate, a first arc-shaped plate, a second flat plate, and a second arc-shaped plate, which are sequentially connected in a circumferential direction of the second cross beam and enclose a closed-loop structure; the first flat plate is perpendicular to the second direction and is far away from the first cross beam in the second direction, the second flat plate is perpendicular to the third direction and is far away from the first cross beam in the third direction, and the first flat plate and the second flat plate are connected with a front suspension mounting piece.

Based on above-mentioned embodiment, suspension installation section and longeron linkage segment have been guaranteed to first arc and second arc and have had good compressive capacity, and first flat board and second flat board are used for connecting the front suspension installed part, provide very big convenience for the welding of front suspension installed part and suspension installation section, are favorable to improving the rigidity of being connected of front suspension installed part mounting panel and suspension installation section, have the promotion to the dynamic stiffness of second crossbeam.

In a second aspect, embodiments of the present application provide a vehicle including a front subframe as described above.

Based on the vehicle in this application embodiment, owing to have above-mentioned preceding sub vehicle frame, preceding sub vehicle frame has good rigidity and mode, has improved whole car NVH performance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a front subframe according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of the front subframe shown in FIG. 1 from another perspective;

FIG. 3 is a rear view schematic of the front subframe of FIG. 2;

FIG. 4 is a schematic structural view of the front subframe shown in FIG. 1 from yet another perspective;

FIG. 5 isbase:Sub>A cross-sectional view ofbase:Sub>A suspended mounting segment taken along section A-A in an embodiment of the present application.

Reference numerals: 10. a first cross member; 20. a second cross member; 21. a suspension mounting section; 211. a first plate; 212. a first arc-shaped plate; 213. a second plate; 214. a second arc-shaped plate; 22. a longitudinal beam connecting section; 30. a stringer; 31. a main body section; 32. a main frame connecting section; 40. a first reinforcing plate; 50. a second reinforcing plate; 60. a third reinforcing plate; 70. a fourth reinforcing plate; 80. the fifth strengthening board; 90. a front suspension mount; a. a first direction; b. a second direction; c. and a third direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The front auxiliary frame is an important component of the front axle and the rear axle, and is connected with a transmission system, a power system, a suspension system, an exhaust system and a vehicle body, if the front auxiliary frame is unreasonably designed, the rigidity and the mode of the front auxiliary frame are low, further, excitation energy of a power assembly and a road surface is greatly transmitted to the vehicle body through the front auxiliary frame, the Noise radiation of a vehicle is large, NVH (Noise, vibration and Harshness) in the vehicle is reduced, in addition, a hydrogen energy vehicle type is a future trend, the auxiliary frame systems of a traditional fuel vehicle type and a hybrid vehicle type are obviously not suitable for a hydrogen energy vehicle type, and therefore, the front auxiliary frame system with the rigidity and the mode meeting the hydrogen energy vehicle type needs to be designed.

In order to solve the above technical problems, referring to fig. 1 to 5, a first aspect of the present invention provides a front subframe having better load bearing and supporting capabilities and fatigue endurance strength.

Referring to fig. 1, the front subframe includes a first cross member 10, a second cross member 20, and two longitudinal members 30 disposed at an interval; the first cross beam 10 is arranged between the two longitudinal beams 30, two ends of the first cross beam 10 are respectively connected with the two longitudinal beams 30, and the first cross beam 10 is arranged along a first direction a; the second cross beam 20 comprises a suspension installation section 21 and two longitudinal beam 30 connecting sections 22 connected to two ends of the suspension installation section 21, the suspension installation section 21 protrudes out of the two longitudinal beam 30 connecting sections 22 towards the first cross beam 10 in the second direction b, and the end parts, far away from the suspension installation section 21, of the two longitudinal beam 30 connecting sections 22 are respectively connected with the two longitudinal beams 30 in a one-to-one correspondence manner; the longitudinal beams 30 comprise main body sections 31 and two main frame connecting sections 32 respectively connected to two ends of the main body sections 31, along the first direction a, the main body section 31 of any longitudinal beam 30 protrudes out of the two main frame connecting sections 32 towards the main body section 31 of the other longitudinal beam 30, and along the third direction c, the main body section 31 protrudes out of the two main frame connecting sections 32 towards the first cross beam 10; the first direction a, the second direction b and the third direction c are mutually perpendicular.

The first cross member 10 provides mounting and support for an electric hydraulic pump and a damping regulator of a shock-absorbing device, and improves the stability of the front subframe, and the shape of the first cross member 10 is not limited in the present embodiment, for example, a circular tubular structure, a square tubular structure, or H-shaped steel, and in view of the good deformation resistance of the arc-shaped wall of the circular tubular structure and the good energy absorption and buffering of the internal cavity, in some embodiments of the present invention, the first cross member 10 is configured as a circular tubular structure; it will be appreciated that the greater the wall thickness and outer diameter of the first cross member 10, the greater the torsional rigidity of the first cross member 10 and the greater the resistance to deformation, and since the electro-hydraulic pump and damper regulator of the shock absorbing device are of lesser weight, in some embodiments of the present application the wall thickness of the first cross member 10 is 19mm.

The second cross beam 20 is used for connecting a power assembly and improving the stability of the front subframe, wherein the suspension installation section 21 is used for connecting the power assembly, the two longitudinal beam connecting sections 22 are used for connecting the longitudinal beams 30 so as to improve the structural stability of the front subframe, and due to the fact that the power assembly is heavy in weight, the wall thickness of the second cross beam 20 is 31mm in some embodiments of the present application; meanwhile, in order to realize that the suspension installation section 21 protrudes from the two longitudinal beam 30 connection sections 22 toward the first cross beam 10 in the second direction b, in some embodiments of the present application, an axis of the suspension installation section 21 is disposed at an angle with respect to an axis of the longitudinal beam 30 connection section 22.

The longitudinal beam 30 is connected with the main frame to support the first cross beam 10 and the second cross beam 20, and further support the electric hydraulic pump and the damping regulator of the damping device and the power assembly, wherein the main body section 31 is used for connecting the first cross beam 10 and the second cross beam 20, and the main frame connecting section 32 is used for connecting the main frame, it can be seen that the load to be borne by the longitudinal beam 30 is large, therefore, in some embodiments of the present application, the wall thickness of the main body section 31 and the main frame connecting section 32 is set to be 34mm, so that the longitudinal beam 30 has sufficient bearing capacity; meanwhile, the shape of the longitudinal beam 30 is not limited in the embodiments of the present application, for example, a circular tubular structure, a square tubular structure, or an H-shaped steel, and in consideration of the good deformation resistance of the arc-shaped wall of the circular tubular structure and the good buffering and energy absorbing functions of the inner cavity, the longitudinal beam 30 is configured as a circular tubular structure in some embodiments of the present application.

According to the front subframe of the embodiment of the application, the suspension installation section 21 of the second cross beam 20 is arranged to protrude from the connecting sections 22 of the two longitudinal beams 30 towards the first cross beam 10 along the second direction b, so that the second cross beam 20 forms a trapezoid structure; simultaneously, the main part section 31 of longeron 30 all projects in two main frame linkage segments 32 settings along first direction a and third direction c, so that longeron 30 constitutes trapezium structure on first direction a and third direction c, trapezoidal stability is relevant with the length relation of going to the bottom, when the bottom is close to zero gradually, whole trapezoidal is close to triangle-shaped gradually, trapezoidal just more and more has stability this moment, consequently, the preceding sub vehicle frame of this application has better stability, and then the bearing support ability and the fatigue endurance strength of this preceding sub vehicle frame have been improved.

Referring to fig. 1, in some embodiments of the present application, the main frame connecting section 32 extends from an end away from the main body section 31 to an end connected to the main body section 31 toward the first cross member 10 in the first direction a and in the third direction c, and the main frame connecting section 32 extends in the first direction a and in the third direction c, so that the main frame connecting section 32 extends from the end away from the main body section 31 to the end connected to the main body section 31 toward the first cross member 10 in the first direction a and in the third direction c, and then the main body section 31 protrudes from the main frame connecting section 32 in the first direction a and in the third direction c, that is, the longitudinal beam 30 is disposed in a trapezoidal structure in the first direction a and in the third direction c, and the load-supporting capability and the fatigue endurance strength of the front subframe are further improved.

Referring to fig. 1, in some embodiments of the present application, the main frame connecting section 32 is disposed in an arc shape along the first direction a and the third direction c, so that the arc-shaped main frame can be smoothly transited to the main body section 31, and the joints of the main frame connecting section 32, and the main body section 31 are not bent, that is, there is no stress concentration point at the joints of the main frame connecting section 32, and the main body section 31, that is, the main body section 31 protrudes from the main frame connecting section 32 along the first direction a and the third direction c is achieved, and the structural strength of the longitudinal beam 30 is also ensured.

Referring to fig. 1, in some embodiments of the present application, the connecting section 22 of the longitudinal beam 30 is connected to the middle of the main section 31 in the second direction b, such that after the ends of the two main frame connecting sections 32 far away from the main section 31 are connected to the main frame, the middle of the main section 31 in the second direction b is the weakest point of the stiffness of the longitudinal beam 30, and at this time, after the connecting section 22 of the longitudinal beam 30 is connected to the middle of the main section 31 in the second direction b, the second cross beam 20 supports the middle of the main section 31 to strengthen the structural strength of the front sub-frame, thereby improving the carrying capacity of the front sub-frame; in the embodiment of the present application, the longitudinal beam 30 is welded to the connecting section 22 and the main body section 31.

Referring to fig. 1, in some embodiments of the present application, the first cross member 10 is connected to a connection portion of the main body section 31 and the main frame connection section 32, so that the connection portion of the first cross member 10 and the connection portion of the main body section 31 and the main frame connection section 32 strengthens the structural strength of the bending portion of the main body section 31 and the main frame connection section 32, thereby improving the load bearing capacity and fatigue durability of the front subframe.

Referring to fig. 1, in some embodiments of the present disclosure, an angle between an axis of the connecting section 22 of the longitudinal beam 30 and an axis of the main body section 31 is 50 °, and the angle is designed to improve the rigidity and the mode of the second cross beam 20 to the maximum extent, and to better reinforce the two longitudinal beams 30, so as to improve the load-bearing capacity and the fatigue durability of the entire front subframe.

Referring to fig. 1, 2, 3 and 4, in some embodiments of the present application, the front subframe further includes a first reinforcing plate 40, a second reinforcing plate 50, a third reinforcing plate 60, a fourth reinforcing plate 70 and a fifth reinforcing plate 80, wherein the first reinforcing plate 40 is connected to the main body section 31 and the side of the connecting section 22 of the longitudinal beam 30 close to the arc section along the third direction c; the second reinforcing plate 50 is connected with the main body section 31 and one side of the connecting section 22 of the longitudinal beam 30 far away from the arc-shaped section along the third direction c; the third reinforcing plate 60 is connected with the first reinforcing plate 40 and the second reinforcing plate 50 at the side close to each other of the main body section 31 and the connecting section 22 of the longitudinal beam 30, and the first reinforcing plate 40, the second reinforcing plate 50 and the third reinforcing plate 60 enclose a cavity; a fourth reinforcing plate 70 connected to the connecting section 22 and the main body section 31 of the side member 30; the fifth reinforcement plate 80 is connected to the second cross member 20 and the main frame connecting section 32.

In some embodiments of the present application, the first reinforcing plate 40 includes a second beam connecting portion and two spaced-apart longitudinal beam connecting portions, both of which are connected to the second beam connecting portion and the main body section 31, and the second beam connecting portion is connected to the longitudinal beam connecting portion.

In some embodiments of the present application, the second reinforcing plate 50 is configured as a right triangle with good stability, and one acute angle of the second reinforcing plate 50 connects the longitudinal beam 30 connecting section 22, and the other acute angle and the right angle connect the suspended mounting section 21.

In some embodiments of the present application, the third reinforcing plate 60 is configured to be rectangular, and has two avoidance openings, the two avoidance openings are respectively communicated with any two opposite side edges of the third reinforcing plate 60, two sides of the third reinforcing plate 60 having the avoidance openings are respectively connected to the suspension mounting section 21 and the main body section 31, the avoidance openings are used for avoiding the suspension mounting section 21 and the main body section 31 so that the third reinforcing plate 60 can contact the suspension mounting section 21 and the main body section 31, and the remaining opposite sides are connected to the first reinforcing plate 40 and the second reinforcing plate 50, so that the first reinforcing plate 40, the second reinforcing plate 50, and the third reinforcing plate 60 support each other, and the structural stability of the front subframe is further improved.

In some embodiments of the present application, the fourth reinforcing plate 70 is configured as an obtuse triangle, and two obtuse corners of the fourth reinforcing plate are respectively connected to the connecting section 22 and the main body section 31 of the longitudinal beam 30.

In some embodiments of the present application, the fifth reinforcing plate 80 is configured as a parallelogram, two adjacent edges of the fifth reinforcing plate 80 are respectively connected to the first cross member 10 and the main frame connecting section 32, and an included angle between the two adjacent edges is an obtuse angle.

In some embodiments of the present application, the third reinforcing plate 60 includes two third sub reinforcing plates, the two third sub reinforcing plates are respectively and fixedly connected to the first reinforcing plate 40 and the second reinforcing plate 50, that is, the first reinforcing plate 40 and one of the third sub reinforcing plates are formed by bending a sheet metal part by 90 °, the second reinforcing plate 50 and the other third sub reinforcing plate are formed by bending a sheet metal part by 90 °, and after the first reinforcing plate 40 is connected to the suspension mounting section 21 and the main body section 31 and the second reinforcing plate 50 is connected to the suspension mounting section 21 and the main body section 31, the two third sub reinforcing plates are welded to form the third reinforcing plate 60, so that a weld formed by the two third sub reinforcing plates is located on a plane until there is a weld, and compared to the welding of the first reinforcing plate 40 and the third reinforcing plate 60 and the welding of the second reinforcing plate 50 and the third reinforcing plate 60, there are not only two welds, but also two welds are located at the weld of the first reinforcing plate 40 and the third reinforcing plate 60 and the bend of the second reinforcing plate 50 and the third reinforcing plate 60, and the bend of the material of the second reinforcing plate 50 and the third reinforcing plate 60, and the material of the subframe is easily subject to stress at the bending point of the material of the subframe.

Referring to fig. 5, in some embodiments of the present application, each of the suspension installation section 21 and the connecting section 22 of the longitudinal beam 30 includes a first flat plate 211, a first arc-shaped plate 212, a second flat plate 213, and a second arc-shaped plate 214, which are sequentially connected along the circumferential direction of the second cross beam 20 and enclose a closed-loop structure; the first flat plate 211 is arranged perpendicular to the second direction b and far away from the first cross beam 10 along the second direction b, the second flat plate 213 is arranged perpendicular to the third direction c and far away from the first cross beam 10 along the third direction c, the first flat plate 211 and the second flat plate 213 are connected with the front suspension mounting piece 90, namely, the first flat plate 211 forms a suspension mounting section 21 and the longitudinal beam 30 connecting section 22 far away from one side of the first cross beam 10 and is perpendicular to the first direction a, and the second flat plate 213 forms a bottom shell of the suspension mounting section 21 and the longitudinal beam 30 connecting section 22 and is perpendicular to the third direction c; so, first flat board 211 and second flat board 213 are used for connecting front suspension installed part 90, provide very big convenience for front suspension installed part 90 and suspension installation section 21's welding, are favorable to improving front suspension installed part 90 and suspension installation section 21's rigidity of being connected, have the promotion to the dynamic stiffness of second crossbeam 20, and first arc 212 and second arc 214 are used for guaranteeing that suspension installation section 21 and longeron 30 linkage segment 22 have good compressive capacity.

It will be appreciated that, since the front suspension mounting section 21 is used to connect the front suspension mounts 90, in some embodiments of the present application, only the front suspension mounting section 21 includes the first flat plate 211, the first curved plate 212, the second flat plate 213, and the second curved plate 214, and the longitudinal beam 30 connecting section 22 may be provided in any shape.

In combination with the above, the stability of the trapezoid is related to the length relationship between the upper bottom and the lower bottom, when the upper bottom is gradually close to zero, the whole trapezoid gradually approaches to the triangle, and at this time, the trapezoid has more and more stability, that is, the shorter the length of the suspension installation section 21 along the second direction b should be, the better the stability of the front subframe is, therefore, in some embodiments of the present application, the length of the suspension installation section 21 along the second direction b is equal to the length of the front suspension installation section 90 along the second direction b, that is, the length of the suspension installation section 21 can only arrange the front suspension installation section 90, so that the stability of the second beam 20 is maximized.

In some embodiments of the present application, the first cross beam 10, the second cross beam 20, and the longitudinal beam 30 are formed by bending a sheet metal part, specifically, the first cross beam 10 is bent from a sheet metal part with a thickness of 19mm to form a tubular structure, the second cross beam 20 is bent from a sheet metal part with a thickness of 31mm to form a first flat plate 211, a first arc-shaped plate 212, a second flat plate 213, and a second arc-shaped plate 214, and then the second cross beam 20 is bent in the direction of its axis to form the suspension mounting section 21 and the connecting section 22 of the longitudinal beam 30; the longitudinal beam 30 is bent into a tubular structure by a 34mm sheet metal part, and is bent along the axial direction of the longitudinal beam 30 to form a main body section 31 and a main frame connecting section 32.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operate, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the above terms can be understood according to the specific situation by those skilled in the art.

The present application is intended to cover various modifications, equivalent arrangements, and adaptations of the present application without departing from the spirit and scope of the present application.

Claims

1. A front auxiliary frame is characterized by comprising a first cross beam, a second cross beam and two longitudinal beams arranged at intervals;

the first direction, the second direction and the third direction are mutually vertical.

2. The front subframe of claim 1 wherein said main frame connection section extends in said first direction and in said third direction toward said first cross member from an end remote from said main section to an end connected to said main section, said main frame connection section extending in a direction having both a first directional component and a third directional component.

3. The front subframe of claim 2 wherein said main frame connection section is arcuately disposed in both said first direction and said third direction.

4. The front subframe of claim 1 wherein said rail attachment section is attached to said body section at a location intermediate said second direction.

5. The front subframe of claim 1 wherein said first cross member is connected at the junction of said main body section and said main frame connection section.

6. The front subframe of claim 1 wherein the axis of said rail connecting section is disposed at a 50 ° angle to the axis of said body section.

7. The front subframe of claim 1 further comprising:

the first reinforcing plate is connected with the main body section and one side, close to the main frame connecting section, of the longitudinal beam connecting section along the third direction;

the second reinforcing plate is connected with the main body section and one side, far away from the main frame connecting section, of the longitudinal beam connecting section along the third direction;

a third reinforcing plate connected to the first reinforcing plate and the second reinforcing plate near the main body section and the longitudinal beam connecting section, wherein a cavity is defined by the first reinforcing plate, the second reinforcing plate and the third reinforcing plate;

the fourth reinforcing plate is connected with the longitudinal beam connecting section and the main body section and is arranged opposite to the third reinforcing plate;

and the fifth reinforcing plate is connected with one side of the first cross beam, which is far away from the second cross beam, and the opposite side of the main frame connecting section.

8. The front subframe of claim 1 wherein said side rails, said first cross member, and said second cross member are each provided as a tubular structure, said side rails having a wall thickness of 34mm, said first cross member having a wall thickness of 19mm, and said second cross member having a wall thickness of 31mm.

9. The front subframe of any one of claims 1-8 wherein the suspension mounting section and the longitudinal beam connecting section each comprise a first flat plate, a first curved plate, a second flat plate, and a second curved plate connected in series along a circumference of the second cross beam and enclosing a closed loop structure; the first flat plate is perpendicular to the second direction and is far away from the first cross beam in the second direction, the second flat plate is perpendicular to the third direction and is far away from the first cross beam in the third direction, and the first flat plate and the second flat plate are connected with a front suspension mounting piece.

10. A vehicle, characterized by comprising:

the front subframe of any one of claims 1-9.