Novel stamping and welding rear auxiliary frame

Abstract

The novel stamping and welding rear auxiliary frame comprises a front cross beam, a rear cross beam and a reinforcing pipe, the rear cross beam is installed on the rear side of the front cross beam, the left end of the rear side of the front cross beam is fixedly connected with a left longitudinal beam, and the right end of the rear side of the front cross beam is fixedly connected with a right longitudinal beam. The upper end of the front side of the left end of the left longitudinal beam is fixedly connected with a front upper swing arm, the lower end of the front side of the left end of the left longitudinal beam is fixedly connected with a toe-in swing arm, the two ends of the rear side of the front cross beam are fixedly connected with front lower swing arms, the middle of the front side of the rear cross beam is fixedly connected with a reinforcing pipe, and the left end and the right end of the reinforcing pipe are fixedly connected with rear lower swing arms. And the rear end of the left longitudinal beam is fixedly connected with the left end of the front side of the rear cross beam. According to the novel stamping and welding rear auxiliary frame, the toe-in and front lower control arm structural design form is convenient, the structure is compact, the rigidity is high, control arm mounting points are convenient to reinforce mutually, the structural stability is improved, and the Y-direction rigidity and strength of a rear lower swing arm are convenient to improve.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive chassis structural parts, and particularly to a new type of stamping and welding rear subframe. Background Technique

[0002] With the rapid development of domestic new energy vehicles, in order to enhance the competitive advantages of their own products, most new energy vehicle manufacturers choose the five-link suspension with better handling performance in the suspension selection. As an important structural part of the suspension system, the rear subframe bears components such as motors, control arms, stabilizer bars, and steering gears, resulting in a relatively cramped layout space and a relatively complex structure.

[0003] The Chinese utility model patent with the authorized announcement number CN219524019U discloses a new type of stamping and welding rear subframe, which relates to the technical field of automotive chassis structural parts. It includes a rear subframe main body surrounded by a front crossbeam (1), a rear crossbeam (2), a left longitudinal beam (3), and a right longitudinal beam (4). Control arm brackets and spring arm brackets are provided on the rear subframe. The spring arm brackets include a left spring arm bracket (5) and a right spring arm bracket (6), and the left spring arm bracket (5) and the right spring arm bracket are arranged inside the space surrounded by the rear subframe. It also includes a V-shaped crossbeam (7), and both ends of the V-shaped crossbeam (7) are respectively connected to the left spring arm bracket (5) and the right spring arm bracket (6), and the middle of the V-shaped crossbeam (7) is connected to the rear crossbeam (2), and the V opening formed by the V-shaped crossbeam (7) faces the front crossbeam (1). It improves the dimensional accuracy of the overall surface of the rear subframe, has a compact layout, and reduces the requirements for the layout space. It improves the durability and stiffness.

[0004] Since in the existing technology, there are problems in the structural design and welding method of the control arm, which are not conducive to making the structural design of the front beam and the front lower control arm compact and high in stiffness, and the relationship between the installation points of each control arm is not conducive to mutual strengthening and improving the structural stability, and the design structure of the rear lower control arm bracket is not conducive to improving the Y-direction stiffness and strength of the rear lower swing arm. Therefore, we propose a new type of stamping and welding rear subframe to solve the problems mentioned above. Content of the Utility Model

[0005] The purpose of the utility model is to provide a new type of stamping and welding rear subframe to solve the problems in the existing technology mentioned in the above background technique, that is, the structural design and welding method of the control arm are not conducive to making the structural design of the front beam and the front lower control arm compact and high in stiffness, and the relationship between the installation points of each control arm is not conducive to mutual strengthening and improving the structural stability, and the design structure of the rear lower control arm bracket is not conducive to improving the Y-direction stiffness and strength of the rear lower swing arm.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A novel stamping and welding rear subframe, including a front crossbeam, a rear crossbeam and a reinforcing pipe. The rear crossbeam is installed at the rear side of the front crossbeam, and the left longitudinal beam is fixedly connected to the left end of the rear side of the front crossbeam, and the right longitudinal beam is fixedly connected to the right end of the rear side of the front crossbeam. The upper front end of the left side of the left longitudinal beam is fixedly connected with a front upper swing arm, and the lower front end of the left side of the left longitudinal beam is fixedly connected with a front toe-in swing arm. The two ends of the rear side of the front crossbeam are fixedly connected with front lower swing arms. The middle part of the front side of the rear crossbeam is fixedly connected with a reinforcing pipe, and the left and right ends of the reinforcing pipe are fixedly connected with rear lower swing arms.

[0007] Preferably, the rear end of the left longitudinal beam is fixedly connected to the left front end of the front side of the rear crossbeam.

[0008] Preferably, the rear end of the right longitudinal beam is fixedly connected to the right front end of the front side of the rear crossbeam.

[0009] Preferably, the front bracket of the front toe-in swing arm and the rear bracket of the front lower swing arm are of an integral structure.

[0010] Preferably, the rear bracket of the front toe-in swing arm and the rear piece of the front upper swing arm are fixedly connected by welding.

[0011] Preferably, the bracket of the rear lower swing arm adopts a front and rear piece structure.

[0012] Preferably, the top ends of the rear lower swing arms are fixedly connected to the bottom surfaces of the left longitudinal beam and the right longitudinal beam respectively.

[0013] Compared with the prior art, the beneficial effects of the present utility model are: For this novel stamping and welding rear subframe, it is convenient to make the structural design of the front toe-in and the front lower control arm compact in structure and high in stiffness, which is convenient for strengthening each other between the mounting points of the control arms, improving the structural stability, and convenient for improving the Y-direction stiffness and strength of the rear lower swing arm;

[0014] 1. The front toe-in swing arm is divided into a front bracket of the front toe-in swing arm and a rear bracket of the front toe-in swing arm. The split structure is simple, the welding efficiency is high, and the front bracket of the front toe-in swing arm and the rear bracket of the front lower swing arm are of an integral structure, which is compact in structure and high in stiffness;

[0015] 2. The rear bracket of the front toe-in swing arm and the rear piece of the front upper swing arm are fixedly connected by welding, and each control arm mounting point is strengthened with each other, which is convenient for improving the structural stability;

[0016] 3. The bracket of the rear lower swing arm adopts a front and rear piece structure, and a V-shaped reinforcing pipe is arranged in the middle, which is convenient for improving the Y-direction stiffness and strength of the rear lower swing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front perspective structural schematic diagram of the present utility model;

[0018] Figure 2Schematic diagram of the top surface perspective structure of the present utility model;

[0019] Figure 3 Schematic diagram of the bottom surface perspective structure of the present utility model;

[0020] Figure 4 Schematic diagram of the side surface perspective structure of the present utility model;

[0021] Figure 5 Schematic diagram of the perspective connection structure of the front crossbeam and the left longitudinal beam of the present utility model;

[0022] Figure 6 Schematic diagram of the perspective connection structure of the front upper swing arm, the front toe swing arm and the front lower swing arm of the present utility model.

[0023] In the figure: 1. Front crossbeam; 2. Rear crossbeam; 3. Left longitudinal beam; 4. Right longitudinal beam; 5. Front upper swing arm; 6. Front toe swing arm; 7. Front lower swing arm; 8. Reinforcing pipe; 9. Rear lower swing arm. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1: Please refer to Figures 1 - 6 , for the existing new stamping and welding rear subframe, the structural design and welding method of the control arm are not convenient for making the structural design form of the front toe and the front lower control arm compact and have high stiffness. To solve this technical problem, the following technical content is disclosed in this embodiment;

[0026] A rear crossbeam 2 is installed at the rear side of the front crossbeam 1, and a left longitudinal beam 3 is fixedly connected to the left end of the rear side of the front crossbeam 1, and the rear end of the left longitudinal beam 3 is fixedly connected to the left end of the front side of the rear crossbeam 2. A right longitudinal beam 4 is fixedly connected to the right end of the rear side of the front crossbeam 1, and the rear end of the right longitudinal beam 4 is fixedly connected to the right end of the front side of the rear crossbeam 2. The front upper swing arm 5 is fixedly connected to the upper left front end of the left longitudinal beam 3, and the front toe swing arm 6 is fixedly connected to the lower left front end of the left longitudinal beam 3. The front lower swing arms 7 are fixedly connected to both ends of the rear side of the front crossbeam 1;

[0027] The front toe swing arm 6 is divided into a front toe control arm front bracket and a front toe control arm rear bracket. The front toe swing arm 6 is of a split structure, which is simple in structure and can improve the welding efficiency. The front toe control arm front bracket and the rear bracket of the front lower swing arm 7 are both of an integral structure, and the integral structure is compact and has high stiffness;

[0028] Embodiment 2: For the existing new stamping-welded rear subframe, the relationship between the mounting points of each control arm is not convenient for mutual strengthening and improving the structural stability. Therefore, in this embodiment, the following technical solutions are adopted, as Figures 1 - 6 shown;

[0029] The front bracket of the toe link 6 and the rear bracket of the front lower control arm 7 are of an integral structure, and the rear bracket of the toe link 6 and the rear piece of the front upper control arm 5 are fixedly connected by welding

[0030] This structure has good weldability, and overall improves the stiffness and connection strength of the control arm mounting bracket, ensuring product reliability;

[0031] Embodiment 3: For the existing new stamping-welded rear subframe, the design structure of the rear lower control arm bracket is not convenient for improving the Y-direction stiffness and strength of the rear lower control arm. Therefore, in this embodiment, the following technical solutions are adopted, as Figures 1 - 4 shown;

[0032] A reinforcing pipe 8 is fixedly connected to the middle part of the front side of the rear cross member 2, and both the left and right ends of the reinforcing pipe 8 are fixedly connected with a rear lower control arm 9. Moreover, the bracket of the rear lower control arm 9 adopts a front and rear piece structure, and the top ends of the rear lower control arm 9 are respectively fixedly connected to the bottom surfaces of the left longitudinal beam 3 and the right longitudinal beam 4;

[0033] The structural design of the rear lower control arm 9 and the structural design of the reinforcing pipe 8 can improve the Y-direction stiffness and strength of the rear lower control arm 9.

[0034] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0035] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A novel stamped and welded rear subframe, comprising a front crossbeam (1), a rear crossbeam (2) and a reinforcement tube (8), characterized in that: A rear cross beam (2) is installed on the rear side of the front cross beam (1), and a left longitudinal beam (3) is fixedly connected to the left rear end of the front cross beam (1), and a right longitudinal beam (4) is fixedly connected to the right rear end of the front cross beam (1), a front upper swing arm (5) is fixedly connected to the left front upper end of the left longitudinal beam (3), and a toe swing arm (6) is fixedly connected to the left front lower end of the left longitudinal beam (3), both rear ends of the front cross beam (1) are fixedly connected to front lower swing arms (7), a reinforcement tube (8) is fixedly connected to the front middle of the rear cross beam (2), and both left and right ends of the reinforcement tube (8) are fixedly connected to rear lower swing arms (9).

2. According to claim 1, the novel stamping and welding rear subframe is characterized in that: The rear end of the left longitudinal beam (3) is fixedly connected to the front left end of the rear cross beam (2).

3. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The rear end of the right longitudinal beam (4) is fixedly connected to the front right end of the rear cross beam (2).

4. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The front bracket of the toe-in swing arm (6) and the rear bracket of the front lower swing arm (7) are an integrated structure.

5. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The rear bracket of the toe-in swing arm (6) is fixedly connected to the rear plate of the front upper swing arm (5) by welding.

6. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The bracket of the rear lower swing arm (9) adopts a front and rear plate structure.

7. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The top end of the rear lower swing arm (9) is fixedly connected to the bottom surfaces of the left longitudinal beam (3) and the right longitudinal beam (4) respectively.

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