Novel stamping and welding rear auxiliary frame
By designing a new stamped welded rear subframe, using welding and fixed connections of components such as front cross beams and longitudinal arms to form an integrated suspension structure and a split structure, the problems of poor stiffness performance and difficult to guarantee the welding strength of the existing subframe are solved, and higher stiffness and connection strength are achieved, ensuring product reliability.
Patent Information
- Application Number
- CN202421830235.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-31
AI Technical Summary
The front and rear control arm mounting brackets of the existing automobile chassis subframe are welded to the subframe through longitudinal beams. The welding form is edge-line overlap, resulting in poor stiffness performance, difficult to guarantee the strength of the weld, and easy to break at high loads.
A new type of stamped welded rear subframe is designed, including a front cross beam, longitudinal arm, mounting sleeve, front upper swing arm, front lower swing arm, rear control arm rear plate, rear control arm front plate, reinforcement plate, first reinforcement plate and second reinforcement plate. These components are fixedly connected by welding to form an integrated suspension structure and a split structure to improve stiffness and connection strength.
The new stamped welding subframe has good welding process and welding efficiency in lap assembly, which overall improves stiffness and connection strength, and ensures product reliability and stability.
Smart Images
Figure CN222905660U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile chassis structural parts, in particular to a novel stamping and welding rear auxiliary frame. Background Art
[0002] Common chassis suspension structures in automobile design include McPherson independent suspension, double wishbone independent suspension, multi-link independent suspension, E-type four-link, etc. Regardless of the form of suspension structure, the subframe must be designed with front and rear control arms, which are connected to the wheel center of the vehicle. They are the main load-bearing parts to ensure the normal driving of the vehicle. Therefore, the structural design and welding method of the control arm are crucial to the overall performance and stability. The overlap method will affect the stiffness, strength, fatigue durability, etc. In order to ensure the normal use of the vehicle, avoid failure of the subframe due to insufficient performance of the front and rear control arm installation points, which in turn causes safety accidents.
[0003] However, most of the front and rear control arm mounting brackets of subframes on the market are welded to the subframes through longitudinal beams. The welding form is edge lap joint, the stiffness performance is poor, and the strength of the weld is difficult to guarantee. It is easy to break when subjected to high loads. Therefore, we propose a new stamping and welding rear subframe to solve the above problems. Utility Model Content
[0004] The utility model aims to provide a novel stamping and welding rear sub-frame to solve the problem in the above background technology that most of the front and rear control arm mounting brackets of the sub-frames on the market are welded to the sub-frames through longitudinal beams, the welding form is edge line overlap, the rigidity performance is poor, and the strength of the weld is difficult to ensure, and it is easy to break when subjected to high loads.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel stamped and welded rear subframe, comprising: a front crossbeam, longitudinal arms symmetrically arranged at the rear side of the outer end of the front crossbeam, and a rear control arm rear plate arranged behind the front crossbeam;
[0006] Also includes:
[0007] The outer end of the front cross beam and the rear end of the longitudinal arm are both welded and fixedly connected with a mounting sleeve, and a first connecting structure is arranged outside the connection between the front cross beam and the longitudinal arm, wherein the first connecting structure includes a front upper swing arm and a front lower swing arm, and the front lower swing arm is located below the front upper swing arm;
[0008] A second connection structure is arranged on the inner side of the rear end of the longitudinal arm, wherein the second connection structure includes a rear control arm rear plate, a rear control arm front plate, a reinforcement plate, a first reinforcement plate and a second reinforcement plate, and the rear control arm rear plate is welded and fixed in the longitudinal arm.
[0009] Preferably, the longitudinal arm and the front cross beam in contact with its front end are fixedly connected by welding. The outer end of the longitudinal arm is in an "L" shape structure, and both the front cross beam and the longitudinal arm are pipe beam structures.
[0010] Preferably, the lower end flanging of the front upper swing arm overlaps on the front cross beam and the longitudinal arm, and the upper end flanging of the front lower swing arm overlaps on the lower part of the front cross beam and the longitudinal arm. The flangings of the front upper swing arm and the front lower swing arm are fixedly connected to the front cross beam and the longitudinal arm by welding.
[0011] Preferably, the front side of the upper part of the front end of the rear control arm rear plate overlaps with the front plate of the rear control arm, and both ends of the front plate of the rear control arm are fixedly connected to the longitudinal arm by welding.
[0012] Preferably, reinforcing plates are symmetrically fixed to the rear sides of the left and right ends of the rear control arm rear plate, and the longitudinal arm fixedly connected thereto is nested and connected to the outer upper side of the reinforcing plate.
[0013] Preferably, a first reinforcing plate is fixedly arranged in contact with the lower part of the middle of the rear control arm rear plate and the front plate of the rear control arm. Second reinforcing plates are symmetrically arranged on the outer side of the first reinforcing plate, and the second reinforcing plates are fixedly connected by welding to the lower sides of the longitudinal arm, the rear control arm rear plate and the front plate of the rear control arm.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: This new type of stamping and welding rear subframe is convenient for lapping and assembling, making it have good welding processability and welding efficiency, and is convenient for overall improving the stiffness and connection strength of the stamping and welding rear subframe, ensuring product reliability;
[0015] 1. There are provided a front cross beam, a longitudinal arm and a mounting sleeve. Since symmetrically arranged longitudinal arms are welded to the rear side of the outer end of the front cross beam, and mounting sleeves are fixedly welded to the outer ends of the front cross beam and the longitudinal arm, it is convenient to make the stamping and welding rear subframe an integral suspension structure, improving the assembly accuracy;
[0016] 2. There are provided a front cross beam, a longitudinal arm, a front upper swing arm and a front lower swing arm. Since the front upper swing arm with its outer end lapping is arranged in contact with the outer upper side of the front cross beam and the longitudinal arm, and the front lower swing arm with its outer end lapping with the front cross beam and the longitudinal arm is arranged below the front upper swing arm, it is convenient to make the front end of the stamping and welding rear subframe a split structure, which has a simple structure, high welding efficiency, and is convenient for effectively improving the stiffness;
[0017] 3. There are provided a longitudinal arm, a rear control arm rear plate, a front plate of the rear control arm and a reinforcing plate. Since the inner side of the rear end of the longitudinal arm is fixedly connected to the rear control arm rear plate and the front plate of the rear control arm, the front plate of the rear control arm is lapped and fixed in front of the rear control arm rear plate, and the reinforcing plate is fixedly welded to the outer rear side of the longitudinal arm and the rear control arm rear plate, it is convenient to improve the reliability of the connection at the rear end of the stamping and welding rear subframe, and both the strength and the stiffness are improved;
[0018] 4. The rear control arm rear plate, rear control arm front plate, first reinforcement plate and second reinforcement plate are provided. Since the first reinforcement plate and the second reinforcement plate are respectively provided at the lower side of the middle part and the outer end of the rear control arm rear plate and the rear control arm front plate, the first reinforcement plate is welded and fixed under the rear control arm rear plate and the rear control arm front plate, and the second reinforcement plates symmetrically arranged on the outer side of the first reinforcement plate are welded and fixed on the lower sides of the longitudinal arm, the rear control arm rear plate and the rear control arm front plate. Therefore, it is convenient to strengthen the connection of the longitudinal arm, the rear control arm rear plate and the rear control arm front plate, and improve the stability of the stamped and welded rear subframe. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a front view of the overall structure of the present invention;
[0020] Figure 2 is a rear view of the overall structure of the present invention;
[0021] Figure 3 is a bottom view of the structure of the present invention;
[0022] Figure 4 is a schematic diagram of the overall structure of the connection and dispersion of the front upper swing arm and the front lower swing arm of the present invention;
[0023] Figure 5 is a schematic diagram of the overall structure of the connection and dispersion of the first reinforcement plate and the rear control arm rear plate of the present invention.
[0024] In the figure: 1, front cross beam; 2, longitudinal arm; 3, mounting sleeve; 4, front upper swing arm; 5, front lower swing arm; 6, rear control arm rear plate; 7, rear control arm front plate; 8, reinforcement plate; 9, first reinforcement plate; 10, second reinforcement plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0026] Please refer to Figures 1-5, the present utility model provides a technical solution: a novel stamping and welding rear subframe, including a front crossbeam 1, longitudinal arms 2, mounting sleeves 3, front upper swing arms 4, front lower swing arms 5, rear control arm rear plates 6, rear control arm front plates 7, reinforcement plates 8, first reinforcement plates 9 and second reinforcement plates 10. Longitudinal arms 2 symmetrically arranged at the rear side of the outer end of the front crossbeam 1 and a rear control arm rear plate 6 arranged behind the front crossbeam 1. Mounting sleeves 3 are welded and fixedly connected to the outer end of the front crossbeam 1 and the rear end of the longitudinal arm 2, and a first connection structure is arranged outside the connection between the front crossbeam 1 and the longitudinal arm 2. The first connection structure includes a front upper swing arm 4 and a front lower swing arm 5, and the front lower swing arm 5 is located below the front upper swing arm 4. A second connection structure is arranged inside the rear end of the longitudinal arm 2. The second connection structure includes a rear control arm rear plate 6, a rear control arm front plate 7, a reinforcement plate 8, a first reinforcement plate 9 and a second reinforcement plate 10, and the rear control arm rear plate 6 is welded and fixed inside the longitudinal arm 2. Specific Embodiment 1
[0027] In order to solve the problem that in the prior art, most of the front and rear control arm mounting brackets of the rear subframe are welded to the rear subframe through longitudinal beams, and the welding form is edge-to-edge lap joint, with poor stiffness performance. Therefore, in this embodiment, through the following technical solutions, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 , by symmetrically arranging longitudinal arms 2 welded and fixed to the rear side of the outer end of the front crossbeam 1, and mounting sleeves 3 welded and fixed to the inner sides of the outer ends of the front crossbeam 1 and the longitudinal arms 2, it is convenient to make the stamping and welding rear subframe an integral suspension structure, improve the assembly accuracy, and by respectively attaching a front upper swing arm 4 to the outer upper side and a front lower swing arm 5 arranged below the front upper swing arm 4 to the front crossbeam 1 and the longitudinal arms 2, the outer ends of the front upper swing arm 4 and the front lower swing arm 5 are lapped on the front crossbeam 1 and the longitudinal arms 2. Therefore, through the arrangement of the front upper swing arm 4 and the front lower swing arm 5, the front end of the stamping and welding rear subframe is a split structure, with a simple structure and high welding efficiency, and it is convenient to effectively improve the stiffness. And by fixedly connecting a rear control arm rear plate 6 to the inner side of the rear end of the longitudinal arm 2 and arranging a rear control arm front plate 7 in front of the rear control arm rear plate 6, the rear control arm front plate 7 is lapped and fixed on the rear control arm rear plate 6, and a reinforcement plate 8 is welded and fixed to the outer rear side of the longitudinal arm 2 and the rear control arm rear plate 6. Therefore, through the arrangement of the rear control arm rear plate 6, the rear control arm front plate 7 and the reinforcement plate 8, the reliability of the connection at the rear end of the stamping and welding rear subframe is improved, and both the strength and the stiffness are enhanced. Specific Embodiment 2
[0028] In order to solve the problem that in the prior art, it is difficult to ensure the strength of the weld between the longitudinal beam and the rear subframe, and it is easy to break when bearing high loads. Therefore, in this embodiment, through the following technical solutions, such as Figure 1 , Figure 2 , Figure 3 andFigure 5 , a first reinforcing plate 9 is fixedly welded thereto by fitting the lower sides of the middle parts of the rear control arm rear plate 6 and the rear control arm front plate 7. Second reinforcing plates 10 are symmetrically arranged on the left and right sides of the first reinforcing plate 9, and the second reinforcing plates 10 are fixedly welded to the lower sides of the longitudinal arm 2, the rear control arm rear plate 6 and the rear control arm front plate 7. Therefore, it is convenient to strengthen the connection between the rear control arm rear plate 6 and the rear control arm front plate 7 through the first reinforcing plate 9, and strengthen the connection between the longitudinal arm 2, the rear control arm rear plate 6 and the rear control arm front plate 7 through the second reinforcing plates 10, so as to facilitate strengthening the connection between the longitudinal arm 2, the rear control arm rear plate 6 and the rear control arm front plate 7, and improve the stability of the stamped and welded rear subframe. All the components mentioned above are prior arts and will not be described in detail herein.
[0029] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The standard parts used in the present invention 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. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be described in detail herein. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.
[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A new stamping and welding rear subframe, comprising: A front crossbeam (1), a longitudinal arm (2) symmetrically arranged at the rear side of the outer end of the front crossbeam (1), and a rear control arm rear plate (6) arranged at the rear of the front crossbeam (1); It is characterized by further comprising: The outer end of the front cross beam (1) and the rear end of the longitudinal arm (2) are both welded and fixedly connected with a mounting sleeve (3), and a first connection structure is arranged outside the connection between the front cross beam (1) and the longitudinal arm (2), wherein the first connection structure comprises a front upper swing arm (4) and a front lower swing arm (5), and the front lower swing arm (5) is located below the front upper swing arm (4); A second connection structure is provided on the inner side of the rear end of the longitudinal arm (2), wherein the second connection structure comprises a rear control arm rear plate (6), a rear control arm front plate (7), a reinforcement plate (8), a first reinforcement plate (9) and a second reinforcement plate (10), and the rear control arm rear plate (6) is welded and fixed inside the longitudinal arm (2).
2. According to claim 1, the novel stamping and welding rear subframe is characterized in that: The longitudinal arm (2) is fixedly connected to the front cross beam (1) which is fitted at its front end by welding, and the outer end of the longitudinal arm (2) is in an "L"-shaped structure, and both the front cross beam (1) and the longitudinal arm (2) are tubular beam structures.
3. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The lower end flange of the front upper swing arm (4) overlaps the front cross beam (1) and the longitudinal arm (2), and the upper end flange of the front lower swing arm (5) overlaps the front cross beam (1) and the lower longitudinal arm (2), and the flanges of the front upper swing arm (4) and the front lower swing arm (5) are welded and fixed to the front cross beam (1) and the longitudinal arm (2).
4. The novel stamping and welding rear subframe according to claim 1 is characterized in that: The upper front end of the rear control arm rear plate (6) is overlapped with a rear control arm front plate (7), and both ends of the rear control arm front plate (7) are fixed to the longitudinal arm (2) by welding.
5. The novel stamping and welding rear subframe according to claim 1 is characterized in that: Reinforcement plates (8) are symmetrically fixed to the rear sides of the left and right ends of the rear control arm rear plate (6), and the outer upper side of the reinforcement plate (8) is nested and connected to the longitudinal arm (2) fixed thereto.
6. The novel stamping and welding rear subframe according to claim 1 is characterized in that: A first reinforcing plate (9) is provided on the lower middle sides of the rear control arm rear plate (6) and the rear control arm front plate (7) and is fixed thereto, and a second reinforcing plate (10) is symmetrically provided on the outer side of the first reinforcing plate (9), and the second reinforcing plate (10) is welded and fixed to the lower sides of the longitudinal arm (2), the rear control arm rear plate (6) and the rear control arm front plate (7).