Frame type front auxiliary frame structure

Abstract

The utility model relates to a frame type front auxiliary frame structure which comprises two longitudinal beams which are oppositely arranged in parallel, a front beam is arranged at the front ends of the longitudinal beams, a rear beam is arranged at the rear ends of the longitudinal beams, a bent pipe is connected to the rear ends of the longitudinal beams, a rear swing arm support is arranged on the inner bent side of the bent pipe, one end of an angle support is connected to the front beam, and the other end of the angle support is connected to the rear swing arm support. The other end of the angle support is connected to the longitudinal beam, the rear beam is connected with one side of a steering gear support, the other side of the steering gear support is connected to the longitudinal beam, and the longitudinal beam is further provided with a front swing arm support. The auxiliary frame is formed by installing and welding the tubular beam, the sectional material and the simple small stamping part, has the advantages of being few in stamping part, low in die cost and short in welding seam, and is equivalent to a full-stamping part installing and welding type auxiliary frame in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile chassis parts, in particular to a frame-type front auxiliary frame structure. Background Art

[0002] The subframe is an important part of the automobile chassis system. It is a bridge connecting the body and the wheels, and provides a mounting base for half of the automobile chassis. At present, traditional automobile subframes are mainly welded from steel sheet metal stampings, and some are welded from a combination of pipe beams and sheet metal. Various brackets are then welded on the main structure to provide mounting points for suspension parts, stabilizer bars, etc. This results in a generally complex subframe structure, high molding difficulty, large welding deformation, and a relatively heavy assembly weight.

[0003] The functions of automobile subframes include isolating vibration and noise, reducing their direct entry into the car compartment, and automobile subframes can improve the stiffness of suspension connections; effectively isolating road vibrations to bring a better sense of comfort; turning the suspension into an assembly component improves the practicality of the suspension and reduces development costs; the assembly components are easy to install, reducing installation costs.

[0004] However, the frame-type front subframe is generally welded from stamping parts and machined parts. This type of subframe has the characteristics of complex stamping parts structure, multiple stamping processes, and high parts cost. Secondly, it has disadvantages such as long welds and large welding deformation, which make it difficult to control the assembly size, unstable size, and low process capability, making it difficult to install on the vehicle and causing customer complaints. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a frame-type front sub-frame structure, which is a sub-frame formed by welding a tube beam, a profile and a simple small stamping part. This sub-frame has the advantages of fewer stamping parts, low mold cost and short welds, and its performance is equivalent to that of a full stamping part welded sub-frame.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A frame-type front subframe structure comprises two longitudinal beams arranged relatively parallel to each other, a front beam is arranged at the front end of the longitudinal beam, a rear beam is arranged at the rear end, a curved pipe is connected to the rear end of the longitudinal beam, a rear swing arm bracket is arranged on the inner curved side of the curved pipe, one end of an angle bracket is connected to the front beam, the other end of the angle bracket is connected to the longitudinal beam, one side of a steering gear bracket is connected to the rear beam, the other side of the steering gear bracket is connected to the longitudinal beam, and a front swing arm bracket is also arranged on the longitudinal beam.

[0008] One end of a stabilizer bar bracket is connected to the rear swing arm bracket, and the other end of the stabilizer bar bracket is connected to the steering gear bracket.

[0009] Both ends of the front beam are connected to the front body sleeve, the upper end surface of the sleeve reinforcement bracket is fixed on the front body sleeve, and the lower end of the sleeve reinforcement bracket is engaged with the front body sleeve.

[0010] The bent pipe is connected with a rear vehicle body sleeve, and the steering gear bracket is connected with a steering gear sleeve.

[0011] The longitudinal beam and the front beam are both tubular structures, the rear beam is a square tube structure, and a plurality of suspension sleeves are arranged on the tube body of the front beam.

[0012] Corner brackets are arranged on both sides of the longitudinal beam, two front swing arm brackets are arranged on the longitudinal beam, and the two front swing arm brackets are arranged symmetrically on the left and right. There are two steering gear brackets, and the two steering gear brackets are symmetrically connected together up and down. There are two rear swing arm brackets, and the two rear swing arm brackets are connected together up and down.

[0013] The beneficial effects of the utility model are:

[0014] 1. The subframe is welded by pipe beam + profile + simple small stamping parts. This subframe has the advantages of fewer stamping parts, low mold cost, and short welds. Its performance is equivalent to that of the full stamping parts welded subframe. It has many common structural designs for parts, a small number of types, low mold cost, short development cycle, short welds, and small welding deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the frame component A;

[0017] Figure 3 It is a structural schematic diagram of the frame component B;

[0018] Figure 4 It is a structural schematic diagram of the frame component C;

[0019] Figure 5 It is a structural schematic diagram of the frame component D;

[0020] Figure 6 This is a structural diagram of the front subframe assembly;

[0021] As shown in the figure: 1-longitudinal beam; 2-front beam; 3-rear beam; 4-bend pipe; 5-rear swing arm bracket; 6-angle bracket; 7-steering gear bracket; 8-front swing arm bracket; 9-stabilizer bar bracket; 10-front body sleeve; 11-sleeve reinforcement bracket; 12-rear body sleeve; 13-steering gear sleeve; 14-suspension sleeve; 20-frame assembly A; 21-frame assembly B; 22-frame assembly C; 23-frame assembly D. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Example 1

[0024] like Figures 1 to 6 As shown, a frame-type front subframe structure comprises two longitudinal beams 1 arranged relatively in parallel, a front beam 2 is arranged at the front end of the longitudinal beam 1, a rear beam 3 is arranged at the rear end, a curved pipe 4 is connected to the rear end of the longitudinal beam 1, a rear swing arm bracket 5 is arranged on the inner curved side of the curved pipe 4, one end of an angle bracket 6 is connected to the front beam 2, the other end of the angle bracket 6 is connected to the longitudinal beam 1, one side of a steering gear bracket 7 is connected to the rear beam 3, the other side of the steering gear bracket 7 is connected to the longitudinal beam 1, and a front swing arm bracket 8 is also arranged on the longitudinal beam 1.

[0025] One end of a stabilizer bar bracket 9 is connected to the rear swing arm bracket 5 , and the other end of the stabilizer bar bracket 9 is connected to the steering gear bracket 7 .

[0026] Both ends of the front beam 2 are connected to a front body sleeve 10 , an upper end surface of a sleeve reinforcement bracket 11 is fixed to the front body sleeve 10 , and a lower end of the sleeve reinforcement bracket 11 is engaged with the front body sleeve 10 .

[0027] The bent pipe 4 is connected to a rear body sleeve 12 , and the steering gear bracket 7 is connected to a steering gear sleeve 13 .

[0028] The longitudinal beam 1 and the front beam 2 are both tubular structures, the rear beam 3 is a square tube structure, and a plurality of suspension sleeves 14 are arranged on the tube body of the front beam 2 .

[0029] Corner brackets 6 are provided on both sides of the longitudinal beam 1, two front swing arm brackets 8 are provided on the longitudinal beam 1, and the two front swing arm brackets 8 are symmetrically arranged on the left and right. There are two steering gear brackets 7, and the two steering gear brackets 7 are symmetrically connected together up and down. There are two rear swing arm brackets 5, and the two rear swing arm brackets 5 are connected together up and down.

[0030] The longitudinal beam 1, the front beam 2 and the rear beam 3 are welded to form a frame assembly A20; the frame assembly A20, the angle bracket 6, two vertically symmetrical steering gear brackets 7 and the steering gear sleeve 13 are combined into a frame assembly B21; the frame assembly B21, the front swing arm bracket 8 and two vertically symmetrical rear swing arm brackets 5 are combined into a frame assembly C22; the frame assembly C22, the suspension sleeve 14 and the stabilizer bar bracket 9 are combined into a frame assembly D23; the frame assembly D23, the front body sleeve 10, the rear body sleeve 12 and the sleeve reinforcement bracket 11 are combined into a front subframe assembly. This subframe structure is mainly composed of the longitudinal beam 1, the front beam 2, the rear beam 3, the rear swing arm bracket 5, the angle bracket 6, the steering gear bracket 7, the front swing arm bracket 8, the stabilizer bar bracket 9, the front body sleeve 10, the sleeve reinforcement bracket 11, the rear body sleeve 12, the steering gear sleeve 13, and the suspension sleeve 14.

[0031] The longitudinal beam 1, the front beam 2 and the rear beam 3 are all made of pipe structures. The front beam 2 is a straight pipe, and the edge line can be cut by laser using a welded pipe. The longitudinal beam 1 is a two-dimensional bending structure, and the welded pipe is bent on a pipe bending machine, that is, the rear end of the longitudinal beam 1 is bent into a bent pipe 4. The longitudinal beam 1 is a bilaterally symmetrical structure, and the pipe bending mold can be shared. The rear beam 3 is a profile, and the edge line can be cut by laser using the finished profile. The three pipe beams have a simple structure and a low mold cost.

[0032] Front swing arm bracket 8: including a left-right symmetrical front bracket and a rear bracket, adopting a U-shaped self-symmetrical structure, the front bracket and the rear bracket can be shared, and secondly, the left and right parts can also be shared, so the parts of the four front swing arm brackets 8 are shared, and only one mold needs to be opened;

[0033] Rear swing arm bracket 5: The upper left bracket adopts a U-shaped structure, and the Z-axis coordinate of the rear mounting point of the swing arm is located on the XY plane of the center of the longitudinal beam. The upper left bracket can be used for the lower right bracket after being flipped, and the lower left bracket can be used for the upper right bracket after being flipped. The upper left bracket and the lower left bracket are symmetrical structures, and the mold can produce two, which is low in cost;

[0034] Steering gear bracket 7: adopts the upper and lower plate buckling structure, in addition to supporting the steering gear sleeve 13, it also takes into account the corner reinforcement function of the longitudinal beam 1 and the rear beam 3. The upper left bracket can be used for the lower right bracket after flipping, and the lower left bracket can be used for the upper right bracket after flipping. The upper left bracket and the lower left bracket are symmetrical structures, and the mold can produce two, which is low in cost;

[0035] Corner bracket 6: This structure is located at the right angle between the front beam 2 and the longitudinal beam 1. According to the minimalist design concept, the part structure is designed to be U-shaped and self-symmetrical. The parts at the four right angles have the same structure, that is, they are shared, and only one mold is required;

[0036] Stabilizer bar bracket 9 and sleeve reinforcement bracket 11: the parts have a simple structure and the left and right parts adopt a common design;

[0037] Casing: The front body casing 10, the rear body casing 12, the steering gear casing 13, and the suspension casing 14 are all machined parts with mature and simple processes; the end faces of the front body casing 10 and the rear body casing 12 are both toothed structures to prevent misalignment with the body mounting surface and produce abnormal noise.

[0038] The subframe is welded by pipe beam + profile + simple small stamping parts. This subframe has the advantages of fewer stamping parts, low mold cost, and short welds. Its performance is equivalent to that of the full stamping parts welded subframe. It has many common structural designs for parts, a small number of types, low mold cost, short development cycle, short welds, and small welding deformation.

[0039] In terms of performance, the tubular beam subframe can reach a first-order torsion of more than 90Hz and a first-order bending of more than 200Hz through free mode; the fully stamped and welded subframe has a first-order torsion of generally between 60 and 90Hz and a first-order bending of generally between 170 and 200Hz through free mode.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame-type front subframe structure, comprising two longitudinal beams (1) arranged relatively parallel to each other, characterized in that: The front end of the longitudinal beam (1) is provided with a front beam (2), and the rear end is provided with a rear beam (3); the rear end of the longitudinal beam (1) is connected to a bent pipe (4), and a rear swing arm bracket (5) is provided on the inner bent side of the bent pipe (4); one end of an angle bracket (6) is connected to the front beam (2), and the other end of the angle bracket (6) is connected to the longitudinal beam (1); one side of a steering gear bracket (7) is connected to the rear beam (3), and the other side of the steering gear bracket (7) is connected to the longitudinal beam (1); and a front swing arm bracket (8) is also provided on the longitudinal beam (1).

2. A frame-type front subframe structure as claimed in claim 1, characterized in that; One end of a stabilizer bar bracket (9) is connected to the rear swing arm bracket (5), and the other end of the stabilizer bar bracket (9) is connected to the steering gear bracket (7).

3. A frame-type front subframe structure as claimed in claim 1, characterized in that; Both ends of the front beam (2) are connected to a front body sleeve (10), an upper end surface of a sleeve reinforcement bracket (11) is fixed to the front body sleeve (10), and a lower end of the sleeve reinforcement bracket (11) is engaged with the front body sleeve (10).

4. A frame-type front subframe structure as claimed in claim 1, characterized in that; The bent pipe (4) is connected to a rear vehicle body sleeve (12), and the steering gear bracket (7) is connected to a steering gear sleeve (13).

5. A frame-type front subframe structure as claimed in claim 1, characterized in that; The longitudinal beam (1) and the front beam (2) are both tubular structures, the rear beam (3) is a square tube structure, and a plurality of suspension sleeves (14) are arranged on the tube body of the front beam (2).

6. A frame-type front subframe structure as claimed in claim 1, characterized in that; Angle brackets (6) are arranged on both sides of the longitudinal beam (1), two front swing arm brackets (8) are arranged on the longitudinal beam (1), and the two front swing arm brackets (8) are arranged symmetrically on the left and right, there are two steering gear brackets (7), and the two steering gear brackets (7) are symmetrically connected together in the upper and lower parts, and there are two rear swing arm brackets (5), and the two rear swing arm brackets (5) are connected together in the upper and lower parts.

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