CN211731547U

CN211731547U - Auxiliary frame of automobile

Info

Publication number: CN211731547U
Application number: CN201921836336.6U
Authority: CN
Inventors: 刘叶艳; 石伯妹; 王文志; 徐玲欣
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-10-23
Anticipated expiration: 2029-10-29

Abstract

The utility model relates to a car sub vehicle frame mainly includes front beam, rear frame member and longitudinal wall, and a longitudinal wall is respectively connected at the both ends of rear frame member, and the front end of longitudinal wall is connected with the front beam, and the both ends of front beam and the rear end of two longitudinal walls all are equipped with the sleeve pipe, all are equipped with the toe-in installing support between the both ends of front beam and the longitudinal wall, are fixed with preceding control arm installing support on the longitudinal wall. The utility model discloses profitable effect is: the utility model discloses simple structure, processing is convenient, and low in manufacturing cost is favorable to improving the whole and local rigidity of sub vehicle frame, intensity and fatigue, realizes the lightweight design.

Description

Auxiliary frame of automobile

Technical Field

The utility model relates to an automobile parts structure, especially a car sub vehicle frame.

Background

The prior technical scheme has the following defects: the conventional auxiliary frame is complex in structure, complex to machine and heavy, and is not beneficial to saving cost; the unreasonable structural design causes low mode, low rigidity and poor strength.

Disclosure of Invention

The utility model discloses solve above-mentioned prior art's shortcoming, provide a simple structure, low-cost car sub vehicle frame.

The utility model provides a technical scheme that its technical problem adopted: the automobile auxiliary frame mainly comprises a front cross beam, a rear cross beam and longitudinal arms, wherein the two ends of the rear cross beam are respectively connected with one longitudinal arm, the front end of each longitudinal arm is connected with the front cross beam, the two ends of the front cross beam and the rear ends of the two longitudinal arms are respectively provided with a sleeve, a toe-in mounting bracket is arranged between the two ends of the front cross beam and the longitudinal arms, and a front control arm mounting bracket is fixed on each longitudinal arm.

The cross section of the longitudinal arm from back to front is formed by a square to round transition pipe, the rear end of the longitudinal arm is flat and provided with a notch, the longitudinal arm is connected with the sleeve through the notch, the front end of the longitudinal arm is provided with a horn-shaped overlapping opening, and the longitudinal arm is connected with the front cross beam through the overlapping opening.

The rear cross beam is composed of a rear cross beam front plate and a rear cross beam rear plate, the rear cross beam front plate and the rear cross beam rear plate form a horizontal splayed structure from front to back, the left end and the right end of the horizontal splayed structure are outwards stretched to be connected with the longitudinal arm, the rear cross beam front plate and the rear cross beam rear plate are connected through a lap joint block, the lap joint block inwards forms a plurality of closed cavities, and the outer end of the lap joint block and the longitudinal arm form a weight reduction cavity.

Rear control arm mounting bosses which are bilaterally symmetrical are arranged on the front plate of the rear cross beam and the rear plate of the rear cross beam, rear suspension mounting holes are formed in the mounting bosses, rear cross beam reinforcing ribs which protrude in the opposite direction of the mounting bosses are arranged at two ends of each rear suspension mounting hole, a plurality of lightening holes are formed in two sides of the front plate of the rear cross beam and two sides of the rear plate of the rear cross beam, the lightening holes are arranged bilaterally symmetrically, and each lightening hole is provided with a flanging structure.

The toe-in mounting bracket is composed of a toe-in front plate and a toe-in rear plate, welding ends are arranged at the tops of the toe-in front plate and the toe-in rear plate, the welding end of the toe-in front plate is connected with the front cross beam, a crescent hole is formed in the welding end of the toe-in rear plate, the welding end of the front end of the crescent hole is connected with the front cross beam, and the welding end of the rear end of the crescent hole is connected with the trailing arm.

The toe-in front plate and the toe-in rear plate are provided with front plate flanges and rear plate flanges, the rear plate flanges are provided with a plurality of toe-in reinforcing ribs, the toe-in front plate and the toe-in rear plate are provided with toe-in mounting tables protruding inwards, the middle of each toe-in mounting table is provided with a toe-in mounting hole, two sides of each toe-in mounting hole are provided with convex hulls protruding in the direction opposite to that of each toe-in mounting table, the toe-in rear plate is further provided with 2 stabilizer bar mounting holes on the right side of each toe-in mounting table, a reinforcing plate is arranged between each toe-in front plate and each toe-in rear plate, one side of each reinforcing plate is connected with the toe-in front plate, and the other side of each.

The front control arm mounting bracket is composed of a first platform, a second platform, a third platform and two longitudinal surfaces, the first platform is arranged on the tops of the two longitudinal surfaces and connected with the two longitudinal surfaces, the rear side of the second platform is connected with the lower part of the longitudinal surface at the front side of the first platform, and the front side of the second platform is connected with the third platform; the left side of the front control arm mounting bracket is provided with a lap plate, the lap plate is vertically arranged, the lower end of the lap plate is simultaneously connected with the longitudinal surface of the front side, the second platform and the third platform, and the front ends of the lap plate and the third platform are connected with the front cross beam; the right end of the front control arm mounting bracket is connected with the trailing arm.

The first platform of the front control arm mounting bracket forms an obtuse angle with the longitudinal plane at 90 degrees, the second platform forms an obtuse angle with the front side longitudinal plane, the third platform forms an obtuse angle with the second platform and faces downwards, an avoidance hole is formed in the joint of the second platform and the third platform, and the avoidance hole is located at the joint of the front cross beam and the longitudinal arm; control arm mounting holes are formed in the two longitudinal faces, a weight reduction groove is formed in the first platform, and a front control arm flanging is arranged on the edge of the longitudinal face on the rear side of the control arm mounting support.

The front cross beam is composed of a pipe with a cross section from two ends to the middle and in a square-to-round transition mode, the front cross beam is gradually arched upwards from the two ends, and the highest point is reached in the middle of the pipe.

The utility model discloses profitable effect is: the utility model discloses simple structure, processing is convenient, and low in manufacturing cost is favorable to improving the whole and local rigidity of sub vehicle frame, intensity and fatigue, realizes the lightweight design.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a front cross member configuration;

FIG. 3 is a schematic illustration of a trailing arm configuration;

FIG. 4 is a schematic view of a rear cross member configuration;

FIG. 5 is a schematic view of a toe mount bracket configuration;

fig. 6 is a schematic view of the front control arm mounting bracket configuration.

Description of reference numerals: 1. a sleeve; 2. a toe-in mounting bracket; 3. a front cross member; 4. a rear cross member; 5. a trailing arm; 6. a front control arm mounting bracket; 201, flanging the rear plate; 202. bundling reinforcing ribs in advance; 203. a stabilizer bar mounting hole; 204. a front rear plate; 205. a crescent hole; 206. welding the end; 207. a reinforcing plate; 208. a toe-in front plate; 209. binding and flanging the front; 210. a convex hull; 211 toe-in mounting table; 212. a toe-in mounting hole; 401. a rear cross member front plate; 402. a rear cross member rear panel; 403. the lapping is quick; 404. a closed cavity; 405. a rear cross beam reinforcing rib; 406. mounting a boss; 407. lightening holes; 408. a weight-reducing cavity; 409. a rear suspension mounting hole; 501. opening the gap; 502. a lap joint opening; 601. a lap plate; 602. a second platform; 603. a control arm mounting hole; 604. the front control arm is flanged; 605. a longitudinal surface; 606. a weight reduction groove; 607. a first platform; 608. avoiding holes; 609. and a third platform.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in the figure, the automobile auxiliary frame mainly comprises a front cross beam 3, a rear cross beam 4 and longitudinal arms 5, wherein two ends of the rear cross beam 4 are respectively connected with one longitudinal arm 5, the front end of each longitudinal arm 5 is connected with the front cross beam 3, two ends of the front cross beam 3 and the rear ends of the two longitudinal arms 5 are respectively provided with a sleeve 1, the sleeves 1 are used for connecting the auxiliary frame with an automobile body, a front beam mounting bracket 2 is arranged between two ends of the front cross beam 3 and the longitudinal arms 5, and a front control arm mounting bracket 6 is fixed on each longitudinal arm 5. The front cross beam 3 is composed of a pipe with a cross section from two ends to the middle and with a square transition to a round transition, the front cross beam 3 is gradually arched upwards from two ends, and the highest point is reached in the middle of the pipe. Front beam 3 uses square to the pipe of circular transition, and square pipe does the overlap joint to do with sleeve pipe 1 on the edge to front beam 3, does benefit to the welding, and the middle transition of front beam 3 is because the pipe does benefit to the first-order mode of torsion that improves whole sub vehicle frame, and further, the pipe does benefit to deformation processing, can satisfy multiple structure needs, practices thrift the processing cost, and both ends begin to make progress hunch-up gradually and are favorable to dodging.

The trailing arm 5 is composed of a pipe with a square-to-round transition from the back to the front section, the rear end of the trailing arm 5 is flat and is provided with a notch 501, the trailing arm 5 is connected with the sleeve 1 through the notch 501, the front end of the trailing arm 5 is provided with a horn-shaped overlapping opening 502, and the trailing arm 5 is connected with the front cross beam 3 through the overlapping opening 502. The flat square pipe in trailing arm 5 rear end cooperates opening 501 again, does benefit to being connected of trailing arm 5 rear end and sleeve pipe 1, and trailing arm 5 is from the square to circular transition forward from the back, then does benefit to other directness and trailing arm 5 to even, and the circular arc does benefit to processing, and bearing capacity is strong. At the front end of the trailing arm 5 and the front crossbeam 3 junction, because the pipe diameter of the front crossbeam 3 is much larger than the trailing arm 5, so set up tubaeform overlap joint mouth, make the trailing arm 5 link together well with the front crossbeam 3, the overlap joint area of trailing arm 5 and front crossbeam 3 has been increased to tubaeform turn-ups, the stress that produces between the two that significantly reduces.

The rear cross beam 4 is composed of a rear cross beam front plate 401 and a rear cross beam rear plate 402, a horizontal splayed structure is formed in the front and the rear of the rear cross beam front plate 401 and the rear cross beam rear plate 402, the left end and the right end of the rear cross beam front plate are outwards stretched to be connected with the longitudinal arm 5, the horizontal splayed rear cross beam 4 enables the rear cross beam 4 to outwards expand and widen from the middle to the two sides until being connected with the longitudinal arm 5, the connecting area of the two sides of the rear cross beam 4 and the longitudinal arm 5 is increased by more than one time, the torsional rigidity of the whole auxiliary frame is greatly improved, the stress borne by the longitudinal arm 5 or the rear cross beam 4 can be uniformly dispersed, the local stress borne by the rear cross beam 4 and the longitudinal arm 5 is greatly reduced, meanwhile, the reinforcing of the rear cross beam 4 also provides a more stable mounting platform for a rear control arm mounting bracket mounted on the rear cross beam 4, and. The front plate 401 and the rear plate 402 are connected by a lapping block 403, the lapping block 403 forms a plurality of closed cavities 404 inwards, and the outer end of the lapping block 403 and the trailing arm 5 form a weight-reducing cavity 408. Because the frame type auxiliary frame needs to make the rear cross beam 4 larger in order to ensure better mode, the weight of the auxiliary frame can be greatly increased, a closed cavity 404 formed by the lapping blocks 403 can transfer the force between the front and rear plates of the cross beam and play a good role in weight reduction, when the front and rear plates of the rear cross beam extend outwards, a weight reduction cavity 408 is formed, so that the rear cross beam 4 is fully connected with the longitudinal arm 5, and a good weight reduction effect can be formed, and in a connection area with the longitudinal arm 5, the front plate 401 of the rear cross beam is recycled towards the middle, so that the contact area between the rear cross beam 4 and the longitudinal arm 5 is increased while the weight is reduced, and the effect of reducing local stress and improving the connection rigidity is achieved. Rear control arm mounting bosses 406 which are bilaterally symmetrical are arranged on the front plate 401 and the rear plate 402 of the rear cross beam, rear suspension mounting holes 409 are formed in the mounting bosses 406, rear cross beam reinforcing ribs 405 which protrude in the direction opposite to the mounting bosses 406 are arranged at two ends of each rear suspension mounting hole 409, the mounting holes 409 are arranged to provide positioning and mounting effects for the rear control arms, the mounting bosses 406 can serve as positioning surfaces for mounting control arm bushings through the protruding surfaces on one hand, mounting and positioning are convenient, on the other hand, the rigidity and strength of the mounting bracket can be improved due to the protruding structures, the rigidity and strength of the mounting surface can be further improved due to the rear cross beam reinforcing ribs 405 protruding in the direction opposite to the bosses, and deformation and stress concentration of the mounting bracket are reduced. The two sides of the front plate 401 and the rear plate 402 of the rear cross beam are provided with a plurality of lightening holes 407, the lightening holes 407 are arranged in bilateral symmetry, and each lightening hole 407 is provided with a flanging structure. The large lightening holes 407 arranged in the regions where stress and rigidity are insensitive of the front plate and the rear plate of the rear cross beam have a very remarkable effect on lightening the auxiliary frame, meanwhile, the flanging at the positions of the lightening holes 407 can greatly weaken the effect of rigidity reduction caused by hole excavation, and comprehensively, the lightweight design is realized.

The front beam mounting bracket 2 is composed of a front beam front plate 208 and a front beam rear plate 204, welding ends 206 are arranged at the tops of the front beam front plate 208 and the front beam rear plate 204, the welding end 206 of the front beam front plate 208 is connected with the front cross beam 3, the welding end 206 of the front beam rear plate 204 is provided with a crescent hole 205, the welding end 206 at the front end of the crescent hole 205 is connected with the front cross beam 3, and the welding end 206 at the rear end is connected with the trailing arm 5. Present toe-in installing support is whole by a support basically and is constituted, the utility model discloses the mode of two board combinations around utilizing, can utilize the change of two board structures and the performance maximize of combination with the toe-in support through the concrete structure that combines sub vehicle frame to improve, the utility model discloses it has crescent moon 205 to open at toe-in front bezel 208, toe-in rear plate 204 and front beam 3, trailing arm 5 welded overlap joint, can play the effect that the welding was dodged on the one hand, can also reduce the stress concentration of support here to can alleviate support weight, further, can satisfy toe-in rear plate 204 and connect front beam 3 and trailing arm 5 simultaneously, realize the optimal design of structure, the biggest increase toe-in front, the connection area of rear plate and front beam, trailing arm has improved the rigidity of toe-in support. The toe-in front plate 208 and the toe-in rear plate 204 are provided with a front plate flange 209 and a rear plate flange 201, the flanges extend from one end of a welding end to the end of the other end, wherein the area of the part of the flange of the toe-in front plate 208 connected with the welding end is larger than that of the other part, the rear plate flange 201 is provided with a plurality of toe-in reinforcing ribs 202, so that the maximization of the flange is realized on the structure with smaller toe-in mounting bracket 2, the rigidity of the toe-in mounting bracket 2 is greatly improved, the toe-in front plate 208 extends outwards at the end of the flange, the area of the part of the flange connected with the welding end is larger than that of the other part, the connection area of the toe-in front plate 208 and the front cross beam of the auxiliary frame is increased while the whole weight of the toe-in mounting bracket 2 is controlled, the rigidity of the toe-in mounting bracket 2 is favorably improved, the stress borne by the toe-in mounting, the existing material of the back plate is reversely provided with the indentation protrusions, so that the rigidity of the bracket is further improved. The front toe front plate 208 and the front toe rear plate 204 are provided with a toe mounting platform 211 protruding inwards, the middle of the toe mounting platform 211 is provided with a toe mounting hole 212, two sides of the toe mounting hole 212 are provided with convex hulls 210 protruding in the direction opposite to the direction of the toe mounting platform 211, the front rear plate 204 is further provided with 2 stabilizer bar mounting holes 203 on the right side of the toe mounting platform 211, the toe mounting platform 211 protruding inwards is provided with mounting holes to facilitate the positioning and mounting of a toe pull rod at the connection position, the reverse convex hulls arranged on two sides of the toe mounting hole 212 are beneficial to improving the rigidity of the toe mounting platform 211 and further improving the stability of the mounting bracket, and the stabilizer bar mounting holes 203 arranged on the right side of the toe mounting hole 212 can be used for mounting the stabilizer bracket, so that the structure of the whole auxiliary frame is more compact, and the utilization rate of the structure is improved. A reinforcing plate 207 is provided between the toe-in front plate 208 and the toe-in rear plate 204, and one side of the reinforcing plate 207 is connected to the toe-in front plate 208 and the other side is connected to the toe-in rear plate 204. The front and rear toe boards are connected by the reinforcing plate 207, so that the rigidity, strength and stability of the toe mounting bracket 2 are further improved; the right side (crescent 205 front end) of the front rear plate 204 is lapped on the front beam front plate 208 through a semi-surrounding shape and is connected with the front beam front plate 208, the right side of the front beam rear plate 204 extends forwards, the front end of the crescent 205 is lapped on the front beam front plate 208, the lower end of the crescent 205 front end is connected with the front plate, and the upper end of the crescent is connected with the front beam and the longitudinal arm of the auxiliary frame.

The front control arm mounting bracket 6 is composed of a first platform 607, a second platform 602, a third platform 609 and two longitudinal planes 605, the first platform 607 is connected with the top of the two longitudinal planes 605, the rear side of the second platform 602 is connected with the lower part of the longitudinal plane positioned at the front side of the first platform 607, the front side of the second platform 602 is connected with the third platform 609; a bridging plate 601 is arranged on the left side of the front control arm mounting bracket 6, the bridging plate 601 is vertically arranged, the lower end of the bridging plate 601 is simultaneously connected with a longitudinal surface 605 on the front side, a second platform 602 and a third platform 607, and the front ends of the bridging plate 601 and the third platform 607 are connected with the front cross beam 3; the right end of the front control arm mounting bracket 6 is connected to the trailing arm 5. Three platform and two vertical surfaces constitute the basic skeleton of front control arm installing support, platform and vertical surface, fillet transition between platform and platform, the structural feature design of the front beam of sub vehicle frame front control arm installing support and sub vehicle frame, the vertical arm is fully utilized to whole structure for sub vehicle frame front control arm increases as far as with sub vehicle frame area of contact, improve the rigidity of front control arm installing support, intensity, add the overlap joint board and couple together platform and side and with the crossbeam, the rigidity of support has been improved on the one hand, on the other hand can transmit the power that the support received to the crossbeam, the stress that the support self received has been reduced. The first platform 607 and the longitudinal plane 605 of the front control arm mounting bracket 6 form 90 degrees, the second platform 602 and the front longitudinal plane 605 form an obtuse angle, the third platform 609 and the second platform 602 form an obtuse angle and face downwards, and the arrangement of the angles among the planes is beneficial to adjusting the connection relation among the front control arm mounting bracket, the front cross beam and the longitudinal arm of the auxiliary frame, so that the front control arm mounting bracket can have more lap joint ranges to be connected with the front cross beam and the longitudinal arm, and the performance of the front control arm mounting bracket is improved. An avoidance hole 608 is formed at the joint of the second platform 602 and the third platform 609, and the avoidance hole 608 is positioned at the joint of the front cross beam 3 and the trailing arm 5; avoiding hole 608 leaves allowance for the welding position of the cross beam and the longitudinal arm on one hand, can prevent the corner of the bracket from welding seams or the auxiliary frame body in class when the auxiliary frame front control arm mounting bracket is welded with the auxiliary frame, and on the other hand can play a role in reducing weight. Control arm mounting holes 603 are provided on both longitudinal faces 605, and the control arm mounting holes are configured to provide positioning and mounting functions for mounting of the control arm. The first platform 607 is provided with a lightening slot 606, and the longitudinal edge of the rear side of the control arm mounting bracket 6 is provided with a front control arm flanging 604. The weight reduction groove 606 has a weight reduction effect, and meanwhile, more installation allowance can be provided for installation of the control arm, and installation is facilitated.

The utility model provides an among the prior art sub vehicle frame structure complicated, the loaded down with trivial details, not enough, the high problem of processing cost of processing.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides a car sub vehicle frame mainly includes front beam (3), rear frame member (4) and trailing arm (5), characterized by: the two ends of the rear cross beam (4) are respectively connected with a longitudinal arm (5), the front end of each longitudinal arm (5) is connected with the front cross beam (3), the two ends of the front cross beam (3) and the rear ends of the two longitudinal arms (5) are respectively provided with a sleeve (1), a toe-in mounting bracket (2) is arranged between the two ends of the front cross beam (3) and the longitudinal arms (5), and a front control arm mounting bracket (6) is fixed on each longitudinal arm (5).

2. The vehicle subframe of claim 1 wherein: the cross section of trailing arm (5) comprises a square pipe to circular transition from back to front, and the rear end of trailing arm (5) is flat and is equipped with one opening (501), and trailing arm (5) link to each other with sleeve pipe (1) through opening (501), and the front end of trailing arm (5) is equipped with overlap joint (502) of a loudspeaker form, and trailing arm (5) are connected with front beam (3) through overlap joint (502).

3. The vehicle subframe of claim 1 wherein: the rear cross beam (4) is composed of a rear cross beam front plate (401) and a rear cross beam rear plate (402), the rear cross beam front plate (401) and the rear cross beam rear plate (402) form a horizontal splayed structure, the left end and the right end of the horizontal splayed structure are outwards stretched to be connected with a longitudinal arm (5), the rear cross beam front plate (401) and the rear cross beam rear plate (402) are connected through a lapping block (403), the lapping block (403) inwards forms a plurality of closed cavities (404), and the outer end of the lapping block (403) and the longitudinal arm (5) form a weight reducing cavity (408).

4. The vehicle subframe of claim 3 wherein: rear control arm mounting bosses (406) which are bilaterally symmetrical are arranged on the rear cross beam front plate (401) and the rear cross beam rear plate (402), rear suspension mounting holes (409) are formed in the mounting bosses (406), rear cross beam reinforcing ribs (405) protruding in the opposite direction of the mounting bosses (406) are arranged at two ends of the rear suspension mounting holes (409), a plurality of lightening holes (407) are formed in two sides of the rear cross beam front plate (401) and the rear cross beam rear plate (402), the lightening holes (407) are arranged bilaterally symmetrically, and each lightening hole (407) is provided with a flanging structure.

5. The vehicle subframe of claim 1 wherein: the toe-in mounting bracket (2) is composed of a toe-in front plate (208) and a toe-in rear plate (204), a welding end (206) is arranged at the tops of the toe-in front plate (208) and the toe-in rear plate (204), the welding end (206) of the toe-in front plate (208) is connected with the front cross beam (3), a crescent hole (205) is formed in the welding end (206) of the toe-in rear plate (204), the welding end (206) at the front end of the crescent hole (205) is connected with the front cross beam (3), and the welding end (206) at the rear end is connected with the longitudinal arm (5).

6. The vehicle subframe of claim 5 wherein: the toe-in front plate structure is characterized in that a front plate flanging (209) and a rear plate flanging (201) are arranged on the toe-in front plate (208) and the toe-in rear plate (204), a plurality of toe-in reinforcing ribs (202) are arranged on the rear plate flanging (201), toe-in mounting platforms (211) protruding inwards are arranged on the toe-in front plate (208) and the toe-in rear plate (204), toe-in mounting holes (212) are formed in the middles of the toe-in mounting platforms (211), convex hulls (210) protruding in the opposite directions to the toe-in mounting platforms (211) are arranged on the two sides of the toe-in mounting holes (212), 2 stabilizer bar mounting holes (203) are further formed in the right side of the toe-in mounting platforms (211) of the toe-in rear plate (204), a reinforcing plate (207) is arranged between the toe-in front plate (208) and the toe-in rear plate (204), one side of the reinforcing plate (207) is connected with the toe-in front plate (.

7. The vehicle subframe of claim 1 wherein: the front control arm mounting bracket (6) is composed of a first platform (607), a second platform (602), a third platform (609) and two longitudinal planes (605), the first platform (607) is arranged on the tops of the two longitudinal planes (605) and connected with the first platform, the rear side of the second platform (602) is connected with the lower part of the longitudinal plane positioned on the front side of the first platform (607), and the front side of the second platform (602) is connected with the third platform (609); a lapping plate (601) is arranged on the left side of the front control arm mounting bracket (6), the lapping plate (601) is vertically arranged, the lower end of the lapping plate (601) is simultaneously connected with a longitudinal surface (605) of the front side, a second platform (602) and a third platform (609), and the front ends of the lapping plate (601) and the third platform (609) are connected with the front cross beam (3); the right end of the front control arm mounting bracket (6) is connected with the trailing arm (5).

8. The vehicle subframe of claim 7 wherein: a first platform (607) of the front control arm mounting bracket (6) and a longitudinal surface (605) form a 90-degree angle, a second platform (602) and the front side longitudinal surface (605) form an obtuse angle, a third platform (609) and the second platform (602) form an obtuse angle and face downwards, an avoiding hole (608) is formed in the joint of the second platform (602) and the third platform (609), and the avoiding hole (608) is located at the joint of the front cross beam (3) and the longitudinal arm (5); control arm mounting holes (603) are formed in the two longitudinal faces (605), a weight reduction groove (606) is formed in the first platform (607), and front control arm flanges (604) are arranged on the edges of the longitudinal faces on the rear side of the front control arm mounting support (6).

9. The vehicle subframe of claim 1 wherein: the front cross beam (3) is composed of a pipe with a cross section from two ends to the middle and in a square-to-round transition mode, the front cross beam (3) starts to arch upwards from the two ends gradually, and the highest point is reached in the middle of the pipe.