CN115352528A - Front auxiliary frame and vehicle thereof - Google Patents

Abstract

This application relates to a front sub-frame and its vehicle, which belong to the technical field of auto parts. The front sub-frame and its vehicle include a main beam, which is a rectangular tube body; Symmetrically connected on both sides of the main beam, which includes a rear connecting section integrally formed with the end of the main beam, and a middle connecting section and a front connecting section extending toward the front end of the rear connecting section, the rear connecting section and the front connecting section The cross-sections of the sections are all U-shaped structures with openings facing downward, and reinforcing ribs are arranged in the rear connecting section and the front connecting section. Through the closed section of the hollow area in the middle, the problem of insufficient torsion and bending mode of the front subframe caused by the insufficient thickness of the section of the solid structure is avoided, and the NVH performance of the whole vehicle is improved; When the structural reinforcement faces upward, it will accumulate rainwater, sediment, gravel, etc., which meets the performance requirements of strength and stiffness, and also plays a role in weight reduction, further improving the overall lightweight level.

Description

A kind of front auxiliary frame and its vehicle

technical field

The present application relates to the technical field of auto parts, in particular to a front sub-frame and a vehicle thereof.

Background technique

As the key part of the front suspension of the car, the front sub-frame carries the chassis and body and is indispensable. It supports the front axle and suspension system, and connects the front axle and suspension system to the frame. The weight and performance of the important components on the vehicle are more and more valued by the vehicle manufacturers. The stamping and welding deformation of the traditional sub-frame is not easy to control. How to meet the performance requirements and achieve the reduction in the limited layout space of the vehicle The purpose of weight reduction and high precision has become a key breakthrough point in the lightweight design of the sub-frame.

In related technologies, the front sub-frame is mostly made of steel, which is heavy and easy to rust; a small amount of aluminum front sub-frame and "butterfly"-shaped front sub-frame are solid structures, and at the same time, by setting a number of upward reinforcement Ribs are used to increase the strength and rigidity of the structure.

However, in order to ensure light weight, the solid structure of the front sub-frame makes the cross-sectional area smaller, which easily leads to insufficient torsional and bending modes, and is easy to resonate with other systems of the vehicle, which has a certain impact on the NVH performance of the vehicle; at the same time, the reinforcement of the setting The ribs are facing upwards. Although there is a guard plate installed on the lower surface of the front sub-frame, the side is not closed because the suspension needs to jump up and down with the tires and rotate. There are problems such as accumulation of rainwater, silt, gravel and so on.

Contents of the invention

Embodiments of the present application provide a front subframe and its vehicle to solve the problems in the related art that the torsion and bending modes of the front subframe are insufficient to affect the NVH performance of the vehicle and that rainwater, sand, and gravel are easily accumulated.

The first aspect of the embodiment of the present application provides a front sub-frame, including:

The main beam is a rectangular tube;

There are two side longitudinal beams, which are symmetrically connected on both sides of the main beam. It includes a rear connecting section integrally formed with the end of the main beam, and a middle connecting section and a front connecting section extending toward the front end of the rear connecting section. As for the connecting section, the sections of the rear connecting section and the front connecting section are both U-shaped structures with openings facing downward, and reinforcing ribs are arranged in the rear connecting section and the front connecting section.

In some embodiments, the front end of the front connecting section is provided with a front mounting hole of the vehicle body, and the rear end of the rear connecting section is provided with a rear mounting hole of the vehicle body, and both the front mounting hole of the vehicle body and the rear mounting hole of the vehicle body are cylindrical structures , the reinforcing rib on the front connecting section is in the shape of "X".

In some embodiments, the rear connection section is provided with a steering gear installation hole, two control arm rear installation holes and two stabilizer bar installation holes, and the middle connection section is provided with a control arm front installation hole and a fender installation hole;

The mounting holes for the steering gear, the rear mounting holes for the control arm, and the stabilizer bar mounting holes are all cylindrical structures.

In some embodiments, the reinforcing ribs on the rear connecting section include X-shaped first reinforcing ribs and radial second reinforcing ribs;

The first reinforcing rib is located on the outer periphery of the steering gear mounting hole, and the outer cylindrical walls of the steering gear mounting hole, the rear mounting hole of the control arm, and the stabilizer rod mounting hole are all provided with second reinforcing ribs.

In some embodiments, the height of the first rib is higher than that of the steering gear mounting hole, and the height of the cylinder of the stabilizer bar mounting hole is lower than that of the cylinder of the rear mounting hole of the control arm.

In some embodiments, the rear mounting hole of the control arm is located on the side wall of the rear connecting section away from the main beam.

In some embodiments, the height of the first rib, the second rib and the side wall of the rear connecting section gradually decreases in the direction away from the cylindrical wall of the rear mounting hole of the control arm.

In some embodiments, the main beam is provided with a motor support mounting frame higher than the rear connecting section, a plurality of mounting holes and a plurality of process holes, and the motor support mounting frame is a U-shaped support.

In some embodiments, the rear end of the main beam is provided with a main positioning hole and an auxiliary positioning hole for assembling and positioning the front suspension and the vehicle body respectively.

The second aspect of the embodiment of the present application provides a vehicle, including:

The front sub-frame described in any one of the above-mentioned embodiments.

The beneficial effects brought by the technical solution provided by the application include:

(1) The embodiment of the present application provides a front sub-frame and its vehicle. Since the main beam of the front sub-frame is a rectangular tube with a hollow structure, its two ends are integrally formed and closed by the rear connecting section of the side longitudinal beam. Therefore, relying on the closed section of the hollow area in the middle of the front subframe can avoid the problem of insufficient torsion and bending modes of the front subframe caused by insufficient section thickness of the solid structure, which is conducive to improving the NVH performance of the vehicle.

(2) The main beam of the front sub-frame cooperates with the side longitudinal beams integrally formed on both sides to form a design scheme combining the hollow structure in the middle and the solid structure on both sides. The structure is simple, which is conducive to improving the yield rate and meeting the strength of the front sub-frame , stiffness, modal and other performance requirements, improve the reliability of use, and also improve the overall lightweight level.

(3) The front sub-frame is assembled on the whole vehicle, and the rib structure in the front connecting section and the rear connecting section of the side longitudinal beam faces the ground along with the opening, avoiding the accumulation when the front sub-frame rib of the traditional solid structure faces upward. Rainwater, sediment, gravel and other problems; at the same time, the combination of stiffeners and the outer wall structure of the front connecting section and the rear connecting section of the side longitudinal beam not only meets the performance requirements of strength and stiffness, but also plays a role in reducing weight, thereby Further improve the overall lightweight level.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the structural representation of the embodiment of the present application;

Fig. 2 is the top sectional view of the main beam of the embodiment of the present application;

Fig. 3 is a schematic structural diagram of the rear connection section of the embodiment of the present application.

In the accompanying drawings, the list of parts represented by each label is as follows:

100, main beam; 101, motor bracket mounting frame; 102, assembly hole; 103, process hole; 104, main positioning hole; 105, auxiliary positioning hole; 200, side longitudinal beam; 210, front connecting section; 211, front of vehicle body Installation hole; 220, middle connection section; 221, front installation hole of control arm; 222, guard plate installation hole; 230, rear connection section; 231, rear installation hole of vehicle body; 232, steering gear installation hole; 233, rear installation of control arm Hole; 234, the mounting hole of the stabilizer bar; 235, the first reinforcing rib; 236, the second reinforcing rib.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

The embodiment of the present application provides a front subframe and its vehicle, which can solve the problems in the related art that the torsion and bending modes of the front subframe affect the NVH performance of the whole vehicle and the problems of easy accumulation of rainwater, sand and gravel .

Referring to Figures 1 to 3, the first aspect of the embodiment of the present application provides a front sub-frame, including:

The main beam 100 is a rectangular tube;

There are two side longitudinal beams 200, which are symmetrically connected on both sides of the main beam 100. It includes a rear connection section 230 integrally formed with the end of the main beam 100, and a middle connection extending toward the front end of the rear connection section 230. Section 220, front connecting section 210, rear connecting section 230, and front connecting section 210 all have a U-shaped cross-section with the opening facing downward, and reinforcing ribs are arranged in rear connecting section 230 and front connecting section 210 .

The main beam 100 of the front sub-frame of the embodiment of the present application is a flat rectangular tube body, and its closed section is larger than that of the existing sub-frame with a solid structure, which can achieve higher torsional and bending modes, making it difficult to Resonate with other systems of the vehicle, thereby avoiding the problem of insufficient torsion and bending modes of the front subframe caused by insufficient section thickness of the solid structure, which is conducive to improving the NVH performance of the vehicle;

At the same time, the main beam 100 and the side longitudinal beam 200 are integrally cast and formed of aluminum alloy, which is in the shape of a "butterfly". The overall weight is light and there is no risk of corrosion. The rear connecting section 230 of the beam 200 closes both ends of the main beam 100, so that the main beam 100 forms a hollow structure in the middle area, and the side longitudinal beams 200 form a solid structure in the two sides areas. The hollow and solid are combined, the distribution is reasonable, and the structure is simple. The solid structure of the side longitudinal beams 200 on both sides is conducive to installation and load bearing, and the middle area of the main beam 100 is relatively small in force, and then adopts a hollow structure, which is beneficial to the weight reduction of the front sub-frame, while ensuring sufficient torsional and bending modes, the design Reasonable, reduces the difficulty of casting, and is conducive to improving the yield rate during production;

At the same time, the rear connecting section 230 and the front connecting section 210 of the side longitudinal beam 200 are provided with reinforcing ribs, which can not only improve the structural strength and rigidity, but also help to improve the yield and light weight of the front sub-frame, and the rear of the side longitudinal beam 200 The reinforcing ribs arranged in the connecting section 230 and the front connecting section 210 face downward along with the opening. When installed, the reinforcing ribs face the ground, so that rainwater, silt, gravel and other sundries will not accumulate. The outer wall of the connecting section 210 and the rear connecting section 230 is fixedly connected, which not only meets the performance requirements of strength and stiffness, but also plays a role in weight reduction, thereby further improving the overall lightweight level;

At the same time, the area of the side longitudinal beam 200 is designed as a solid structure, which cooperates with the reinforcement ribs on the front connecting section 210 and the rear connecting section 230 to make the overall structure compact and avoid complex mold structures, unstable sand cores and thick structures caused by hollow structures. The problems of casting defects and low pass rate caused by large scale increase the yield rate and economic benefits at the same time;

It should be noted that the structural setting of the main beam in this application is to ensure that the front sub-frame has sufficient torsion and bending modes, to ensure the reliability of use and the NVH performance of the whole vehicle, so it is understandable that, and Not limited to aluminum alloy and integral casting, those skilled in the art can make adaptive adjustments to the size, shape and material of the main beam according to the usage scenarios and test conditions.

In some optional embodiments: referring to Fig. 1, the embodiment of the present application provides a front subframe, the front end of the front connecting section 210 of the front subframe is provided with a vehicle body front mounting hole 211, and the rear connecting section The rear end of 230 is provided with vehicle body rear mounting hole 231, and vehicle body front mounting hole 211 and vehicle body rear mounting hole 231 are cylindrical structures, and the reinforcing rib on the front connecting section 210 is " X " font.

The front end of the front connecting section 210 of the side longitudinal beam 200 of the front sub-frame of the embodiment of the present application is provided with a vehicle body front mounting hole 211, and the front connecting section 210 is gradually deformed and narrowed along the direction of the vehicle body front mounting hole 211, and the rear connecting section 230 The rear end is provided with a vehicle body rear mounting hole 231, and the rear connecting section 230 is gradually deformed and narrowed along the direction of the vehicle body rear mounting hole 231. The rear connecting section 230 is integrally formed at the end of the main beam 100, forming a "butterfly" shape as a whole, and the overall volume is small. The weight is light, and it is convenient to assemble the whole on the vehicle body through the front mounting hole 211 and the rear mounting hole 231 of the vehicle body. The front mounting hole 211 and the rear mounting hole 231 of the vehicle body are used as key stress points, and the cylindrical structure can ensure the connection strength and stiffness;

At the same time, the U-shaped structure of the front connecting section 210 is connected with "X"-shaped reinforcing ribs, and the "X"-shaped reinforcing ribs are connected with the side walls of the front connecting section 210 to form a "field" shape, which ensures the structural strength and rigidity. Under certain circumstances, the effect of weight reduction is achieved, and at the same time, the requirements of assembly technology are met, the thickness of the structure is avoided to increase the difficulty of casting, and the utilization rate of materials is improved, which is beneficial to the economic benefits of production.

In some optional embodiments: Referring to Fig. 1, the embodiment of the present application provides a front subframe, the rear connecting section 230 of the front subframe is provided with a steering gear installation hole 232, two control arms The rear mounting hole 233 and two stabilizer rod mounting holes 234, the middle connecting section 220 is provided with a control arm front mounting hole 221 and a guard plate mounting hole 222;

The steering gear mounting hole 232, the control arm rear mounting hole 233, and the stabilizer bar mounting hole 234 are all cylindrical structures.

The rear connecting section 230 of the side longitudinal beam 200 of the front subframe of the embodiment of the present application is provided with a steering gear mounting hole 232, a control arm rear mounting hole 233 and a stabilizer bar mounting hole 234, and the steering gear mounting hole 232 is located in the rear connecting section 230 is close to the middle connecting section 220, the stabilizer bar mounting hole 234 is located at the rear connecting section 230 close to the main beam 100, the control arm rear mounting hole 233 and the control arm front mounting hole 221 cooperate to install control arm parts, and the stabilizer bar mounting hole 234 cooperates to install The stabilizer bar has a compact structure and a concentrated installation area, which meets the technological requirements of machining, assembly, and disassembly, and improves the efficiency of installation operations;

The steering gear mounting hole 232, the control arm rear mounting hole 233, and the stabilizer bar mounting hole 234 on the rear connecting section 230 of the side longitudinal beam 200 are used as key stress points, all adopt cylindrical structures, which can ensure the connection strength and rigidity, and at the same time The reinforcing ribs provided in the rear connecting section 230 of the side longitudinal beam 200 can be connected to the cylindrical wall of the steering gear mounting hole 232, the control arm rear mounting hole 233, and the stabilizer rod mounting hole 234, and used in combination with the reinforcing ribs to further ensure the strength and stiffness;

It should be noted that the distribution position and structure of the steering gear installation hole 232, the rear installation hole 233 of the control arm, and the stabilizer bar installation hole 234 in this application are to ensure that the front subframe can meet the assembly process requirements of the vehicle body. Therefore, it can be understood that it is not limited to the distribution position and cylindrical structure of the steering gear mounting hole 232, the rear mounting hole 233 of the control arm, and the stabilizer bar mounting hole 234 in this embodiment. The size, shape, position and material of the steering gear mounting hole 232, the rear mounting hole 233 of the control arm, and the stabilizer bar mounting hole 234 are adaptively adjusted.

In some optional embodiments: as shown in FIG. 1 , the embodiment of the present application provides a front subframe, and the reinforcing rib on the rear connecting section 230 of the front subframe includes a first reinforcing rib in an X shape. 235 and the second radial rib 236;

The first reinforcing rib 235 is located on the periphery of the steering gear mounting hole 232 , and the outer cylindrical walls of the steering gear mounting hole 232 , the control arm rear mounting hole 233 , and the stabilizer bar mounting hole 234 are all provided with second reinforcing ribs 236 .

The first reinforcing rib 235 and the second radial reinforcing rib 236 are connected to the rear connecting section 230 of the side longitudinal beam 200 of the front subframe of the embodiment of the present application. The first reinforcing rib 235 is in the shape of an "X". The outer circumference of the steering gear mounting hole 232 ensures the stiffness and steering control performance of the steering gear mounting connection. At the same time, the distance between the first reinforcing rib 235 in the "X" shape and the center of the steering gear mounting hole 232 is set, preferably 15mm, which can ensure the steering The assembly space of the machine fastening bolts also plays a role in strengthening the overall structure, which is convenient for the installation and operation of the steering machine;

At the same time, in the U-shaped structure of the rear connecting section 230 of the side longitudinal beam 200, a plurality of radial second reinforcing ribs 236 are arranged, which are respectively connected to the steering gear mounting hole 232, the rear mounting hole 233 of the control arm, and the stabilizer bar mounting hole. On the outer wall of the cylinder of the hole 234, the radial shape refers to that one end of the second reinforcing rib 236 is connected to the cylindrical wall surface and is evenly distributed, and the radial shape refers to that the other end of the second reinforcing rib 236 is connected to the side wall or the first reinforcing rib 235 in an "X" shape. In addition, the reinforcing ribs are used in combination to further strengthen the strength of the steering gear mounting hole 232, the rear mounting hole 233 of the control arm, and the stabilizer bar mounting hole 234;

At the same time, multiple radial second ribs 236 are staggered to form an "X" shape, and multiple radial second ribs 236 form a triangle with the side wall of the rear connecting section 230, which further improves the installation of the steering gear. The hole 232, the control arm rear mounting hole 233, and the stabilizer bar mounting hole 234 are used as the structural strength and rigidity of the key force-bearing mounting points;

At the same time, the steering gear mounting hole 232, the rear mounting hole 233 of the control arm, and the stabilizer bar mounting hole 234, as key force-bearing mounting points, are distributed on the side longitudinal beams on both sides of the front sub-frame, and the positions are relatively concentrated, thereby corresponding to The side longitudinal beams on both sides of the front sub-frame are designed as a solid structure, which ensures the compact structure of the front sub-frame and at the same time facilitates the finishing of the formed front sub-frame to meet the technological requirements of machining, assembly, disassembly, etc. It avoids the problems of complex mold structure, unstable sand core, and casting defects and low pass rate caused by the hollow structure on both sides of the front sub-frame, which improves the yield rate of manufacturing and improves the economic benefits of production;

At the same time, the X-shaped first reinforcing rib 235 and the radially second reinforcing rib 236 cooperate with each other, which not only improves the strength and rigidity of the overall structure of the front sub-frame, but also has the effect of reducing weight, and is also conducive to improving the yield rate and Lightweight level;

It should be noted that the role of the combined distribution structure of the ribs in this application is to ensure the strength and rigidity of the overall structure of the front sub-frame, and to reduce weight while meeting the requirements for assembly process. Therefore, it is understandable that it is not limited to For the X-shaped reinforcing ribs and the radial reinforcing ribs arranged in this embodiment, those skilled in the art can make adaptive adjustments to the size, shape, position and material of the reinforcing ribs according to the usage scenarios and test conditions.

In some optional embodiments: Referring to FIG. 1 and FIG. 3 , the embodiment of the present application provides a front subframe, the height of the first rib 235 of the front subframe is higher than the steering gear installation hole 232 , the height of the cylinder of the stabilizer bar mounting hole 234 is lower than the cylinder of the rear mounting hole 233 of the control arm.

The height of the first reinforcing rib 235 on the rear connecting section 230 of the side longitudinal beam 200 of the front subframe of the embodiment of the present application is higher than the steering gear installation hole 232, which further ensures the rigidity of the steering gear installation point and the steering during actual use. handling performance;

The height of the cylinder of the stabilizer bar mounting hole 234 is lower than the cylinder of the control arm rear mounting hole 233, so that the control arm rear mounting hole 233 and the stabilizer bar mounting hole 234 form a height difference, which facilitates the installation of the stabilizer bar and the control arm parts of the vehicle body. It meets the performance requirements of the strength and stiffness of the joint, and also meets the requirements of assembly process.

In some optional embodiments: Referring to Fig. 1 and Fig. 2, the embodiment of the present application provides a front subframe, the control arm rear mounting hole 233 of the front subframe is located at the rear connecting section 230 away from the main beam 100 on the side wall.

The control arm rear mounting hole 233 of the front subframe of the embodiment of the present application is located on the side wall of the rear connecting section 230 away from the main beam 100, and utilizes a part of the side wall on the rear connecting section 230 of the side longitudinal beam 200 and a radial The shape of the second rib 236 cooperates with each other to improve the structural strength and rigidity, and improves the reliability of the control arm rear mounting hole 233 when installed and used.

In some optional embodiments: Referring to Fig. 1, the embodiment of the present application provides a front subframe, the first rib 235, the second rib 236 and the rear connecting section 230 of the front subframe The height of the side wall decreases gradually in the direction of the cylindrical wall away from the rear mounting hole 233 of the control arm.

The first reinforcement rib 235, the second reinforcement rib 236, and the side wall of the rear connecting section 230 of the front subframe of the embodiment of the present application show a downward trend in the height of the reinforcement ribs in the direction away from the cylindrical wall of the rear mounting hole 233 of the control arm. weight loss effect.

In some optional embodiments: Referring to Fig. 1 to Fig. 3, the embodiment of the present application provides a front subframe, the main beam 100 of the front subframe is provided with a motor higher than the rear connecting section 230 The bracket mounting frame 101, a plurality of assembly holes 102 and a plurality of process holes 103, the motor bracket mounting frame 101 is a U-shaped bracket.

The main beam 100 of the front sub-frame of the embodiment of the present application is provided with a motor bracket mounting frame 101 higher than the rear connecting section 230, that is, there is no obstruction in the axial direction in FIG. The side walls of the connecting section 230 are all avoided, and the height of the corresponding area is reduced, which also plays a role in weight reduction, and meets the technical requirements of the motor bracket mounting frame 101 due to machining tool feeding, bolt assembly and disassembly, and realizes various reinforcements. The combined use of ribs and outer wall structures not only meets the performance requirements of strength and rigidity, but also takes into account the technical requirements of machining, assembly and disassembly, and further plays a role in weight reduction;

The main beam 100 is a flat rectangular tube structure, and both sides are closed by the rear connecting section 230 of the integrally formed side longitudinal beam 200 to form a hollow structure in the middle area of the front subframe. The hollow structure is filled with sand cores, cast and formed, and the subsequent The sand core is discharged through the process hole 103 provided on it. The force in the middle area where the main beam 100 is located is relatively small, and is limited by the boundary space. The gap is limited, the height of the effective space is about 60mm, and there is enough space to design it as a hollow structure. The process holes 103 on the main beam 100 are of different sizes and are round or oblong. One is used as a positioning hole for the sand core during the casting process. , the second is used as a weight-reducing hole, the third is used as an exposed hole for the sand core, and the fourth is used as a leakage hole for rainwater, sediment, and gravel under special working conditions. It has multiple functions, is easy to use, and also improves the lightweight Level;

The multiple assembly holes 102 provided on the main beam 100 are mainly located in the middle area of the main beam 100, and are mainly used to facilitate the assembly of parts such as the bottom guard plate, cooling pipelines, and wiring harnesses;

It should be noted that the process holes 103 and assembly holes 102 are mainly distributed on one side of the main beam with the holes facing downward. In this embodiment of the application, the strength and rigidity of the overall structure of the front sub-frame are ensured while further reducing weight. It satisfies the requirements of assembly manufacturability, so it can be understood that it is not limited to the process hole 103 and the assembly hole 102 set in this embodiment, and those skilled in the art can adjust the process hole 103 and the assembly hole 102 according to the use scenario and test conditions. Adaptive adjustments for size, shape, and position.

In some optional embodiments: Referring to Fig. 1, the embodiment of the present application provides a front subframe, the rear end of the main beam 100 of the front subframe is provided with The main positioning hole 104 and the auxiliary positioning hole 105 are assembled and positioned.

The main positioning hole 104 and the auxiliary positioning hole 105 on the main beam 100 of the front sub-frame of the embodiment of the present application are arranged on the left and right sides of the rear end of the main beam 100. The two are used in conjunction with each other and have multiple functions. The positioning hole is used as the reference hole for detection, and the positioning hole for sub-frame, front suspension and body assembly, which meets the process requirements of machining, assembly and disassembly.

Referring to Figure 2, the second aspect of the embodiment of the present application provides a vehicle, including:

The front auxiliary frame of any one of the above-mentioned embodiments.

The design scheme of combining the hollow structure of the main beam 100 with the solid structure of the side longitudinal beam 200 of the front sub-frame of the vehicle in the embodiment of the present application, plus a combination of multiple structural ribs, and a plurality of process holes 103 Functional functions not only meet the performance requirements of the front sub-frame for strength, stiffness, and modal, but also improve the reliability of use and the NVH performance of the vehicle, and meet the technological requirements of machining, assembly, and disassembly, and also improve the level of lightweight;

At the same time, the front sub-frame is made of aluminum alloy as a whole, without the risk of corrosion; it is integrally formed, with a compact structure, and at the same time, multiple weight-reducing designs and lightweight designs are conducive to improving fuel economy and cruising range.

In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower" and so on is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed, or operate in a particular orientation, and thus should not be construed as limiting the application. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, or an internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

It should be noted that in this application, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply There is no such actual relationship or order between these entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation manners of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims (10)

1. A front subframe, comprising:

a main beam (100) which is a rectangular pipe body;

the side longitudinal beams (200) are connected to two sides of the main cross beam (100) in a bilateral symmetry mode, and comprise rear connecting sections (230) integrally formed with the end portions of the main cross beam (100), middle connecting sections (220) and front connecting sections (210) extending towards the front end of the rear connecting sections (230), the cross sections of the rear connecting sections (230) and the front connecting sections (210) are U-shaped structures with downward opening directions, and reinforcing ribs are arranged in the rear connecting sections (230) and the front connecting sections (210).

2. The front subframe of claim 1 wherein:

the front end of preceding linkage segment (210) is provided with mounting hole (211) before the automobile body, the rear end of back linkage segment (230) is provided with mounting hole (231) behind the automobile body, mounting hole (231) are cylindrical structure behind mounting hole (211) and the automobile body before the automobile body, strengthening rib on preceding linkage segment (210) is "X" font.

3. The front subframe of claim 1 wherein:

a steering gear mounting hole (232), two control arm rear mounting holes (233) and two stabilizer bar mounting holes (234) are formed in the rear connecting section (230), and a control arm front mounting hole (221) and a guard plate mounting hole (222) are formed in the middle connecting section (220);

the steering gear mounting hole (232), the control arm rear mounting hole (233) and the stabilizer bar mounting hole (234) are all cylindrical structures.

4. A front subframe according to claim 3 wherein:

the reinforcing ribs on the rear connecting section (230) comprise X-shaped first reinforcing ribs (235) and radial second reinforcing ribs (236);

the first reinforcing rib (235) is located on the periphery of the steering engine mounting hole (232), and second reinforcing ribs (236) are arranged on the outer cylindrical wall surfaces of the steering engine mounting hole (232), the control arm rear mounting hole (233) and the stabilizer bar mounting hole (234).

5. The front subframe of claim 4 wherein:

the height of the first reinforcing rib (235) is higher than that of the steering gear mounting hole (232), and the height of the cylinder of the stabilizer bar mounting hole (234) is lower than that of the cylinder of the control arm rear mounting hole (233).

6. The front subframe of claim 5 wherein:

the control arm rear mounting hole (233) is formed in the side wall of the rear connecting section (230) on the side far away from the main cross beam (100).

7. The front subframe of claim 6 wherein:

the side walls of the first reinforcing rib (235), the second reinforcing rib (236) and the rear connecting section (230) are gradually reduced in height in the direction away from the cylindrical wall of the control arm rear mounting hole (233).

8. The front subframe of claim 1 wherein:

the motor support mounting structure is characterized in that a motor support mounting frame (101), a plurality of assembling holes (102) and a plurality of process holes (103) which are higher than the rear connecting section (230) are arranged on the main cross beam (100), and the motor support mounting frame (101) is a U-shaped support.

9. The front subframe of claim 1 wherein:

and the rear end of the main cross beam (100) is provided with a main positioning hole (104) and an auxiliary positioning hole (105) which are respectively used for assembling and positioning a front suspension and a vehicle body.

10. A vehicle, characterized by comprising:

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

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