CN211943495U

CN211943495U - Novel steel frame type front auxiliary frame

Info

Publication number: CN211943495U
Application number: CN202020270583.0U
Authority: CN
Inventors: 杨森; 蒋超; 朱建山; 韩磊
Original assignee: Magna New Energy Vehicle Technology Zhenjiang Co ltd
Current assignee: Magna New Energy Vehicle Technology Zhenjiang Co ltd
Priority date: 2020-03-08
Filing date: 2020-03-08
Publication date: 2020-11-17
Anticipated expiration: 2030-03-08

Abstract

The utility model relates to a novel steel frame front sub vehicle frame, including front beam, the back frame, left longeron, right longeron, front beam is formed by front beam upper plate, the stamping and welding of front beam hypoplastron, left longeron is formed by left longeron upper plate, the stamping and welding of left longeron hypoplastron, right longeron is formed by right longeron upper plate, the stamping and welding of right longeron hypoplastron, back beam is formed by back beam upper plate, the stamping and welding of back frame hypoplastron, left longeron hypoplastron, weld front suspension installation stay tube, steering gear installation stay tube on the right longeron hypoplastron, left longeron, right longeron front end install left front automobile body installing support, right front automobile body installing support respectively, left longeron, weld front lower swing arm left front installing support and front lower swing arm left back installing support around right longeron, front lower swing arm right front installing support and front lower swing arm right back installing support on the back frame, A right rear suspension bracket; the utility model discloses can alleviate self quality furthest, increase battery package arrangement space, promote the continuation of the journey mileage.

Description

Novel steel frame type front auxiliary frame

[ technical field ]

The utility model belongs to the technical field of the automobile parts technique and specifically relates to a novel sub vehicle frame before steel frame.

[ background art ]

The existing new energy pure electric and hybrid electric vehicle type generally adopts a full-frame type front auxiliary frame for ensuring the arrangement, the bearing performance and the good collision performance of a power assembly, and has good lightweight design requirements for reducing the servicing quality requirements. The front auxiliary frame supports the front suspension assembly and is mounted with a vehicle body, and when the requirements on strength and durability are met, the characteristics of platformization, arrangement, collision, NVH vibration isolation and noise reduction need to be considered. At present, the existing auxiliary frame longitudinal beam and the existing auxiliary frame cross beam are mostly formed by punching and tailor-welding a plurality of plates, the number of longitudinal beam and cross beam punching dies is large, the welding process is complex, more cost is consumed, and the precision is not easy to guarantee. Moreover, in order to meet the endurance mileage of new energy vehicles and hybrid vehicles, the arrangement of the battery pack seriously affects the arrangement of the front auxiliary frame.

Moreover, with the requirements of energy conservation and emission reduction of vehicles in modern society and the requirements of national environmental protection policies, new energy vehicles are gradually popularized. Besides bearing a motor assembly and ensuring the mounting positions of parts such as a steering engine, a control arm and a stabilizer bar, the front auxiliary frame of the new energy automobile needs to have good strength and durability requirements, good light weight and platform design requirements. In order to increase the endurance mileage of the whole vehicle and increase the arrangement of a battery pack, the arrangement of the auxiliary frame before the conventional structure can reduce the endurance mileage of the whole vehicle, so that the quality of the whole vehicle is reduced and customers complain about the endurance mileage, and the arrangement requirement cannot be met.

[ contents of utility model ]

The utility model aims at solving foretell not enough and providing a novel sub vehicle frame before steel frame, can furthest lighten self quality, increase battery package arrangement space, promote the continuation of the journey mileage, avoided conventional structural arrangement can reduce whole car continuation of the journey mileage and cause whole car quality to reduce and the problem of customer complaining of complaining.

In order to realize the purpose, the novel steel frame type front auxiliary frame comprises a front cross beam 1, a rear cross beam 23, a left longitudinal beam 4 and a right longitudinal beam 7 which are connected with the front cross beam 1 and the rear cross beam 23, the front cross beam 1, the rear cross beam 23, the left longitudinal beam 4 and the right longitudinal beam 7 are enclosed to form a frame structure, the front cross beam 1, the rear cross beam 23, the left longitudinal beam 4 and the right longitudinal beam 7 are all formed by stamping steel plates, the front cross beam 1 is formed by stamping and welding a front cross beam upper plate 2 and a front cross beam lower plate 3, the left longitudinal beam 4 is formed by stamping and welding a left longitudinal beam upper plate 5 and a left longitudinal beam lower plate 6, the right longitudinal beam 7 is formed by stamping and welding a right longitudinal beam upper plate 8 and a right longitudinal beam lower plate 9, the rear cross beam 23 is formed by stamping and welding a rear cross beam upper plate 24 and a rear cross beam lower plate 26, and front suspension mounting and supporting, A left front vehicle body mounting bracket 12 and a right front vehicle body mounting bracket 15 are respectively mounted at the front ends of the left longitudinal beam 4 and the right longitudinal beam 7, and are connected with the left end and the right end of the front cross beam 1 through the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15, the left front vehicle body mounting bracket 12 is formed by stamping and welding a left front vehicle body mounting bracket front plate 13 and a left front vehicle body mounting bracket rear plate 14, the right front vehicle body mounting bracket 15 is formed by stamping and welding a right front vehicle body mounting bracket front plate 16 and a right front vehicle body mounting bracket rear plate 17, front stabilizer bar mounting brackets 18 are respectively welded on the left front vehicle body mounting bracket front plate 13 and the right front vehicle body mounting bracket front plate 16, a front lower swing arm left front mounting bracket 19 and a front lower swing arm left rear mounting bracket 20 are respectively welded at the front part and the rear part of the left longitudinal beam 4, a front lower swing arm right front mounting bracket 21 and a front lower swing arm right mounting bracket 20 are, The rear-right mounting bracket 22 of the front lower swing arm, the front-left front mounting bracket 19 of the front lower swing arm and the front-right front mounting bracket 21 of the front lower swing arm are arranged in a bilateral symmetry manner, the front-left rear mounting bracket 20 of the front lower swing arm and the front-right rear mounting bracket 22 of the front lower swing arm are arranged in a bilateral symmetry manner, and the rear cross beam 23 is welded with a left rear suspension bracket 27 and a right rear suspension bracket 28.

Further, the cross sections of the front cross beam upper plate 2, the left longitudinal beam upper plate 5, the right longitudinal beam upper plate 8 and the rear cross beam upper plate 24 are all in an inverted U shape, the cross sections of the front cross beam lower plate 3, the left longitudinal beam lower plate 6, the right longitudinal beam lower plate 9 and the rear cross beam lower plate 26 are all in a U shape, and the cross sections of the front cross beam 1, the left longitudinal beam 4, the right longitudinal beam 7 and the rear cross beam 23 are in a box shape.

Furthermore, the two side edges of the front cross beam 1, the rear cross beam 23, the left longitudinal beam 4 and the right longitudinal beam 7 are respectively provided with a groove crumpling structure, each groove crumpling structure comprises at least one groove, and each groove crumpling structure is used for collision energy absorption.

Further, all welded on front beam hypoplastron 3, the rear beam hypoplastron 26 have projection weld nut 30 and rivet nut 31, projection weld nut 30 is provided with two and bilateral symmetry and arranges, rivet nut 31 is provided with three and along left-right interval arrangement.

Further, the rear portions of the left longitudinal beam 4 and the right longitudinal beam 7 and the outer sides of the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15 are all punched with positioning round holes, bushing mounting sleeves 29 are mounted at the positioning round holes, the bushing mounting sleeves 29 are welded on the left longitudinal beam 4, the right longitudinal beam 7, the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15, and riveting nuts 31 are welded at the middle portions of the left longitudinal beam lower plate 6 and the right longitudinal beam lower plate 9.

Further, a rear cross member reinforcing plate 25 is welded between a rear cross member upper plate 24 and a rear cross member lower plate 26 of the rear cross member 23, and the right rear suspension bracket 28 is welded to the rear cross member reinforcing plate 25.

Furthermore, positioning bosses are punched on the lower sides of the left front vehicle body mounting bracket front plate 13 and the right front vehicle body mounting bracket front plate 16 and are used as auxiliary frame welding positioning surfaces.

Further, the front lower swing arm left front mounting bracket 19 and the front lower swing arm right front mounting bracket 21 are both of a U-shaped stamping structure, the front lower swing arm left front mounting bracket 19 is in lap welding with the left longitudinal beam 4 and the left front vehicle body mounting bracket 12, and the front lower swing arm right front mounting bracket 21 is in lap welding with the right longitudinal beam 7 and the right front vehicle body mounting bracket 15.

Further, the front lower swing arm left and rear mounting bracket 20 and the front lower swing arm right and rear mounting bracket 22 are both of a U-shaped stamping structure, the upper portions of the front lower swing arm left and rear mounting bracket 20 and the front lower swing arm right and rear mounting bracket 22 are respectively welded with the left longitudinal beam 4 and the right longitudinal beam 7 in a lap joint mode.

Further, the left rear suspension bracket 27 and the right rear suspension bracket 28 are both formed into U-shaped brackets by punching.

Compared with the prior art, the utility model, have following advantage:

(1) the whole frame type front auxiliary frame is formed by stamping and tailor-welding plates, and the upper and lower plates of the front and rear cross beams and the left and right longitudinal beams are integrally stamped, so that stamping parts and welding processes are reduced, the cost is reduced, and the quality is lightened;

(2) the cross sections of the front and rear cross beams and the left and right longitudinal beams of the utility model are both of a box-shaped structure, and a groove collapsing structure is added, so that the overall strength and torsional rigidity of the auxiliary frame are enhanced, and the collision energy absorption effect is improved;

(3) the utility model discloses flexible bush is matchd with the automobile body mounting point to preceding sub vehicle frame, has promoted NVH vibration isolation and travelling comfort requirement;

(4) the utility model discloses preceding lower swing arm front mounting bracket arranges in the frame front portion, and lower swing arm rear mounting bracket arranges in the frame middle part, has reduced the occupation to frame rear side space, has increased battery package arrangement space, has promoted continuation of the journey mileage;

(5) the utility model discloses aim at providing chassis system and the relevant part installation position of lower automobile body system to when guaranteeing performance requirements such as sufficient intensity, rigidity, mode, crash safety, furthest has alleviateed self quality, has satisfied the platformization, and has increased the battery package and has arranged the space, is worth popularizing and applying.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic structural view of a left front body mounting bracket and a right front body mounting bracket of the present invention;

fig. 4 is a schematic structural view of the front cross member of the present invention;

fig. 5 is a schematic structural view of the rear cross member of the present invention;

fig. 6 is a schematic structural view of the left longitudinal beam of the present invention;

FIG. 7 is a schematic structural view of the right longitudinal beam of the present invention;

FIG. 8 is a schematic view of the assembly of the peripheral mounting member of the front subframe of the present invention;

in the figure: 1. a front cross beam 2, a front cross beam upper plate 3, a front cross beam lower plate 4, a left longitudinal beam 5, a left longitudinal beam upper plate 6, a left longitudinal beam lower plate 7, a right longitudinal beam 8, a right longitudinal beam upper plate 9, a right longitudinal beam lower plate 10, a front suspension mounting support tube 11, a steering gear mounting support tube 12, a left front vehicle body mounting bracket 13, a left front vehicle body mounting bracket front plate 14, a left front vehicle body mounting bracket rear plate 15, a right front vehicle body mounting bracket 16, a right front vehicle body mounting bracket front plate 17, a right front vehicle body mounting bracket rear plate 18, a front stabilizer bar mounting bracket 19, a front lower swing arm left front mounting bracket 20, a front lower swing arm left rear mounting bracket 21, a front lower swing arm right front mounting bracket 22, a front lower swing arm right mounting bracket 23, a rear cross beam 24, a rear cross beam upper plate 25, a rear cross beam reinforcing plate 26, a rear cross beam lower plate 27, A left rear suspension bracket 28, a right rear suspension bracket 29, a bushing mounting sleeve 30, a projection welding nut 31 and a riveting nut.

[ detailed description of the invention ]

The invention is further described below with reference to the accompanying drawings:

as shown in the attached drawings, the utility model provides a novel steel frame type front auxiliary frame, which comprises a front beam 1, a rear beam 23, a left longitudinal beam 4 and a right longitudinal beam 7 which are connected with the front beam 1 and the rear beam 23, wherein the front beam 1, the rear beam 23, the left longitudinal beam 4 and the right longitudinal beam 7 are enclosed into a frame structure, the front beam 1, the rear beam 23, the left longitudinal beam 4 and the right longitudinal beam 7 are all formed by stamping steel plates, the front beam 1 is formed by stamping and welding a front beam upper plate 2 and a front beam lower plate 3, the left longitudinal beam 4 is formed by stamping and welding a left longitudinal beam upper plate 5 and a left longitudinal beam lower plate 6, the right longitudinal beam 7 is formed by stamping and welding a right longitudinal beam upper plate 8 and a right longitudinal beam lower plate 9, the rear beam 23 is formed by stamping and welding a rear beam upper plate 24 and a rear beam lower plate 26, the left longitudinal beam lower plate 6 and the right longitudinal beam 9 are welded with a, a left front vehicle body mounting bracket 12 and a right front vehicle body mounting bracket 15 are respectively mounted at the front ends of a left longitudinal beam 4 and a right longitudinal beam 7 and are connected with the left and right ends of a front cross beam 1 through the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15, the left front vehicle body mounting bracket 12 is formed by stamping and welding a left front vehicle body mounting bracket front plate 13 and a left front vehicle body mounting bracket rear plate 14, the right front vehicle body mounting bracket 15 is formed by stamping and welding a right front vehicle body mounting bracket front plate 16 and a right front vehicle body mounting bracket rear plate 17, front stabilizer bar mounting brackets 18 are respectively welded on the left front vehicle body mounting bracket front plate 13 and the right front vehicle body mounting bracket front plate 16, a front lower swing arm left front mounting bracket 19 and a front lower swing arm left rear mounting bracket 20 are respectively welded at the front part and the rear part of the left longitudinal beam 4, a front lower swing arm front mounting bracket 21 and a front lower swing arm rear mounting bracket 22 are respectively welded, the left front mounting bracket 19 and the right front mounting bracket 21 of the front lower swing arm are arranged in bilateral symmetry, the left rear mounting bracket 20 and the right rear mounting bracket 22 of the front lower swing arm are arranged in bilateral symmetry, and the left rear suspension bracket 27 and the right rear suspension bracket 28 are welded on the rear cross beam 23.

The cross sections of the front cross beam upper plate 2, the left longitudinal beam upper plate 5, the right longitudinal beam upper plate 8 and the rear cross beam upper plate 24 are all in an inverted U shape, the cross sections of the front cross beam lower plate 3, the left longitudinal beam lower plate 6, the right longitudinal beam lower plate 9 and the rear cross beam lower plate 26 are all in a U shape, and the cross sections of the front cross beam 1, the left longitudinal beam 4, the right longitudinal beam 7 and the rear cross beam 23 are in a box shape; the two side edges of the front cross beam 1, the rear cross beam 23, the left longitudinal beam 4 and the right longitudinal beam 7 are respectively provided with a groove crumpling structure, the groove crumpling structure comprises at least one groove, and the groove crumpling structure is used for collision energy absorption; the front cross beam lower plate 3 and the rear cross beam lower plate 26 are respectively welded with a projection welding nut 30 and a riveting nut 31, the projection welding nuts 30 are arranged in bilateral symmetry, the riveting nuts 31 are arranged in three and are arranged at intervals along the left, middle and right, and the installation positions of the electric appliance and exterior system matching structure are provided by the projection welding nuts 30 and the riveting nuts 31; positioning round holes are punched in the rear portions of the left longitudinal beam 4 and the right longitudinal beam 7 and the outer sides of the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15, bushing mounting sleeves 29 are mounted at the positioning round holes, the bushing mounting sleeves 29 are welded to the left longitudinal beam 4, the right longitudinal beam 7, the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15, and riveting nuts 31 are welded to the middle portions of the left longitudinal beam lower plate 6 and the right longitudinal beam lower plate 9.

The utility model discloses in, the welding has rear beam reinforcing plate 25 between rear beam upper plate 24 of rear beam 23 and rear beam hypoplastron 26, and rear beam 23 is formed by rear beam upper plate 24, rear beam reinforcing plate 25, the punching press welding of rear beam hypoplastron 26 promptly, and right back suspension support 28 welds on rear beam reinforcing plate 25. Positioning bosses are punched on the lower sides of the front plate 13 of the left front vehicle body mounting bracket and the front plate 16 of the right front vehicle body mounting bracket and are used as welding positioning surfaces of the auxiliary frame; the front lower swing arm left front mounting bracket 19 and the front lower swing arm right front mounting bracket 21 are both of U-shaped stamping structures, the front lower swing arm left front mounting bracket 19 is welded with the left longitudinal beam 4 and the left front vehicle body mounting bracket 12, and the front lower swing arm right front mounting bracket 21 is welded with the right longitudinal beam 7 and the right front vehicle body mounting bracket 15 in a lap joint manner; the left rear suspension bracket 27 and the right rear suspension bracket 28 are both formed into U-shaped brackets in a stamping mode, the left rear mounting bracket 20 of the front lower swing arm and the right rear mounting bracket 22 of the front lower swing arm are both of U-shaped stamping structures, flanges are arranged on the upper portions of the left rear mounting bracket 20 of the front lower swing arm and the right rear mounting bracket 22 of the front lower swing arm, and the left rear mounting bracket 20 of the front lower swing arm and the right rear mounting bracket 22 of the front lower swing arm are welded with the left longitudinal beam 4 and the right.

The utility model discloses based on the requirement of platformization, lightweight, NVH, the durable, collision of intensity and arranging, design into full frame front auxiliary frame, its major structure is formed by panel punching press welding, wholly is the full frame auxiliary frame of steel. The left and right longitudinal beams and the upper and lower plates of the front and rear cross beams are integrally formed, so that the stamping and welding processes can be reduced, and the weight is reduced; the front and rear cross beams and the left and right longitudinal beams are provided with crumple structures, so that the collision energy absorption performance is improved; the flexible connection of the frame and the vehicle body improves the NVH vibration isolation and comfort requirements; the front lower swing arm front mounting bracket is positioned on the front side of the frame, the rear mounting bracket is positioned in the middle of the frame, the arrangement space of the mounting points behind the frame is reduced, and the arrangement space of the battery pack is increased.

The utility model discloses in, 1 cross-section of front beam is "box-shaped", has promoted intensity and antitorque characteristic, and its left and right sides increases recess ulcerate structure that contracts, optimizes collision energy-absorbing effect, and two projection welding nuts 30 of 3 welding of front beam hypoplastron and three riveting nut 31 reserve electrical apparatus and exterior trim system and join in marriage the hookup location. The left longitudinal beam has a box-shaped section, the strength and the torsion resistance are improved, a groove crumple structure is added on the side edge of the left longitudinal beam, the collision energy absorption is optimized, the welding positions of a front suspension mounting support pipe 10 and a steering engine mounting support pipe 11 are provided, a round hole is punched at the rear part of the left longitudinal beam, a main positioning hole is welded on a frame and a main positioning hole is assembled on a front suspension module, and a nut is riveted on a lower plate 6 of the left longitudinal beam to reserve the matching and mounting position of an external decoration. The right longitudinal beam 7 and the left longitudinal beam 4 have the same process, and a waist hole is punched at the rear part of the right longitudinal beam to serve as an auxiliary positioning hole for assembling a front suspension module of the frame welding auxiliary positioning hole machine. The left and right front

body mount brackets

12, 15 provide front suspension mounting holes and are welded to the front stabilizer bar mount bracket 18 and the bush mount sleeve 29, and positioning bosses are punched on the lower sides of the left and right front body mount

bracket front plates

13, 16 as sub-frame welding positioning faces.

The left front mounting bracket 19 and the right front mounting bracket 21 of the front lower swing arm are of U-shaped stamping structures and are welded with the left longitudinal beam, the right longitudinal beam, the left front vehicle body mounting bracket 12 and the right front vehicle body mounting bracket 15 in an overlapping manner, and stamping bosses are added at the mounting points of the swing arms to ensure the size matching precision and the flatness. The left rear mounting bracket 20 of the front lower swing arm and the right rear mounting bracket 22 of the front lower swing arm are of U-shaped stamping structures, the upper parts of the U-shaped stamping structures are provided with flanges, the rigidity and the welding strength of the brackets are ensured, and the U-shaped stamping structures are welded with the left longitudinal beam 4 and the right longitudinal beam 7. The section of the rear cross beam 23 is in a box shape, the strength and the torsion resistance are improved, a rear cross beam reinforcing plate 25 is additionally arranged on the inner side of the strength-improved cross beam at the welding position of the right rear suspension bracket 28, four projection welding nuts 30 are welded on an upper plate 24 of the rear cross beam to reserve the matching and mounting positions of an external decoration system, two projection welding nuts 30 are welded on a lower plate 26 of the rear cross beam, and three riveting nuts 31 reserve the matching and mounting positions of an electric appliance and the external decoration system. The left rear suspension bracket 27 and the right rear suspension bracket 28 are integrally formed into a U-shaped bracket by stamping, and the suspension brackets are installed by projection welding nuts. The bushing mounting sleeve 29 is welded at four corners and mounts the flexible bushing.

The utility model provides a sub vehicle frame before new forms of energy motorcycle type full frame, it aims at providing chassis system and the relevant part installation position of lower vehicle body system to when guaranteeing performance requirements such as sufficient intensity, rigidity, mode, crash, furthest alleviates self quality, satisfy the platformization, and increase the battery package and arrange the space. This sub vehicle frame before full frame mainly includes front and back crossbeam, controls longeron, controls preceding automobile body installing support, controls preceding installing support of lower swing arm around, controls preceding installing support behind the lower swing arm, left side rear suspension installing support, right rear suspension installing support, preceding suspension erection bracing pipe, three steering gear erection bracing pipe, four bush mounting tube, two stabilizer bar installing supports, spare parts such as a plurality of projection welding nuts, riveting nut constitute full frame. The front auxiliary frame is integrally formed by stamping and tailor-welding plates, and the left and right longitudinal beams and the upper and lower plates of the front and rear cross beams are integrally formed, so that the stamping and welding processes are reduced, and the weight is reduced; the front and rear cross beams and the left and right longitudinal beams are provided with a crumple structure, so that the collision energy absorption performance is improved; the frame is flexibly connected with the vehicle body, so that the NVH vibration isolation and comfort requirements are improved; the front lower swing arm front mounting bracket is positioned at the front side of the frame, the rear mounting bracket is positioned in the middle of the frame, the arrangement space of the mounting points behind the frame is reduced, the arrangement space of the battery pack is increased, and the endurance mileage is improved.

The present invention is not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and are all included in the protection scope of the present invention.

Claims

1. The utility model provides a novel sub vehicle frame before steel frame, includes front beam (1), back beam (23) and left longeron (4), right longeron (7) that are connected with front beam (1), back beam (23), left longeron (4), right longeron (7) enclose synthetic frame structure, its characterized in that: the front cross beam (1), the rear cross beam (23), the left longitudinal beam (4) and the right longitudinal beam (7) are formed by stamping steel plates, the front cross beam (1) is formed by stamping and welding a front cross beam upper plate (2) and a front cross beam lower plate (3), the left longitudinal beam (4) is formed by stamping and welding a left longitudinal beam upper plate (5) and a left longitudinal beam lower plate (6), the right longitudinal beam (7) is formed by stamping and welding a right longitudinal beam upper plate (8) and a right longitudinal beam lower plate (9), the rear cross beam (23) is formed by stamping and welding a rear cross beam upper plate (24) and a rear cross beam lower plate (26), the left longitudinal beam lower plate (6) and the right longitudinal beam lower plate (9) are welded with a front suspension mounting support tube (10) and a steering engine mounting support tube (11), and the front ends of the left longitudinal beam (4) and the right longitudinal beam (7) are respectively provided with a left front, the left front automobile body mounting support (12) is formed by stamping and welding a left front automobile body mounting support front plate (13) and a left front automobile body mounting support rear plate (14), the right front automobile body mounting support (15) is formed by stamping and welding a right front automobile body mounting support front plate (16) and a right front automobile body mounting support rear plate (17), the left front automobile body mounting support front plate (13) and the right front automobile body mounting support front plate (16) are welded with a front stabilizer bar mounting support (18), the front and rear parts of the left longitudinal beam (4) are respectively welded with a front lower swing arm left front mounting support (19) and a front lower swing arm left rear mounting support (20), the front and rear parts of the right longitudinal beam (7) are respectively welded with a front lower swing arm right front mounting support (21) and a front lower swing arm right mounting support (20), The rear-right mounting bracket (22) of the front lower swing arm, the front-left front mounting bracket (19) of the front lower swing arm and the front-right front mounting bracket (21) of the front lower swing arm are arranged in a bilateral symmetry manner, the front-left rear mounting bracket (20) of the front lower swing arm and the rear-right mounting bracket (22) of the front lower swing arm are arranged in a bilateral symmetry manner, and the rear cross beam (23) is welded with a left rear suspension bracket (27) and a right rear suspension bracket (28).

2. The novel steel frame type front subframe according to claim 1, wherein: the cross sections of the front cross beam upper plate (2), the left longitudinal beam upper plate (5), the right longitudinal beam upper plate (8) and the rear cross beam upper plate (24) are all in an inverted U shape, the cross sections of the front cross beam lower plate (3), the left longitudinal beam lower plate (6), the right longitudinal beam lower plate (9) and the rear cross beam lower plate (26) are all in a U shape, and the cross sections of the front cross beam (1), the left longitudinal beam (4), the right longitudinal beam (7) and the rear cross beam (23) are in a box shape.

3. The novel steel frame type front subframe according to claim 1, wherein: the energy-absorbing structure is characterized in that groove crumpling structures are arranged on two side edges of the front cross beam (1), the rear cross beam (23), the left longitudinal beam (4) and the right longitudinal beam (7), each groove crumpling structure comprises at least one groove, and each groove crumpling structure is used for collision energy absorption.

4. The novel steel frame type front subframe according to claim 1, wherein: all welded on front beam hypoplastron (3), rear frame member hypoplastron (26) have projection nut (30) and riveting nut (31), projection nut (30) are provided with two and bilateral symmetry and arrange, riveting nut (31) are provided with three and along left-right interval arrangement.

5. The novel steel frame type front subframe according to claim 1, wherein: the rear portion of left side longeron (4), right longeron (7) and the outside of left front automobile body installing support (12), right front automobile body installing support (15) all the punching press have the location round hole, location round hole department installs bush installing sleeve (29), bush installing sleeve (29) weld on left longeron (4), right longeron (7), left front automobile body installing support (12), right front automobile body installing support (15), the middle part all welds riveting nut (31) on left side longeron hypoplastron (6), right longeron hypoplastron (9).

6. The novel steel frame type front subframe according to claim 1, wherein: a rear cross beam reinforcing plate (25) is welded between a rear cross beam upper plate (24) and a rear cross beam lower plate (26) of the rear cross beam (23), and the right rear suspension bracket (28) is welded on the rear cross beam reinforcing plate (25).

7. The novel steel frame type front subframe according to claim 1, wherein: and positioning bosses are punched on the lower sides of the front left vehicle body mounting bracket plate (13) and the front right vehicle body mounting bracket plate (16), and are used as auxiliary frame welding positioning surfaces.

8. The novel steel frame type front subframe according to claim 1, wherein: the front lower swing arm left front mounting bracket (19) and the front lower swing arm right front mounting bracket (21) are both U-shaped stamping structures, the front lower swing arm left front mounting bracket (19) is welded with the left longitudinal beam (4) and the left front vehicle body mounting bracket (12), and the front lower swing arm right front mounting bracket (21) is welded with the right longitudinal beam (7) and the right front vehicle body mounting bracket (15) in an overlapping manner.

9. The novel steel frame type front subframe according to claim 1, wherein: the left rear mounting bracket (20) of the front lower swing arm and the right rear mounting bracket (22) of the front lower swing arm are both of U-shaped stamping structures, the upper portions of the front lower swing arm and the front lower swing arm are both provided with flanges, and the left rear mounting bracket (20) of the front lower swing arm and the right rear mounting bracket (22) of the front lower swing arm are respectively welded with the left longitudinal beam (4) and the right longitudinal beam (7) in a lap mode.

10. The novel steel frame type front subframe according to claim 1, wherein: and the left rear suspension bracket (27) and the right rear suspension bracket (28) are punched and formed into U-shaped brackets.