Rear shock absorber mounting seat structure and automobile
By designing reinforcement and closed cavity in the rear shock absorber mount structure of the automobile, the problem of insufficient attachment jog stiffness in the prior art is solved, and the installation stiffness performance of the rear shock absorber is significantly improved.
Patent Information
- Application Number
- CN202420677906.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-04-03
AI Technical Summary
The structure of the existing automobile rear shock absorber mount is simple, resulting in insufficient attachment jog stiffness, affecting the NVH performance of the car body.
A rear shock absorber mounting seat structure is designed, including a rear shock absorber mounting bracket, mounting bracket reinforcement and threaded pipe. By installing reinforcement on the mounting bracket and forming a closed cavity along the Z direction, the dynamic stiffness of the attachment point is enhanced.
It effectively improves the attachment jog stiffness performance of the rear shock absorber on the mounting bracket, and accurately achieves the goal of attachment jog stiffness performance of the rear shock absorber.
Smart Images
Figure CN222875696U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile bodies, and in particular relates to a rear shock absorber mounting seat structure and an automobile. Background Art
[0002] The rear shock absorber mounting system of an automobile is an important part of the vehicle body system, and its main function is to install the rear shock absorber of the automobile. Generally speaking, the dynamic stiffness of the rear shock absorber attachment point is a performance index that has a key impact on the NVH performance of the automobile. In the prior art, the structure design and connection of the attachment point of the rear shock absorber mounting seat of the vehicle body are simple, which easily leads to weak stiffness of the entire vehicle body. Utility Model Content
[0003] The utility model provides a rear shock absorber mounting seat structure, which is used for improving the dynamic stiffness performance of the rear shock absorber attachment point.
[0004] The technical solution of the utility model is:
[0005] The utility model provides a rear shock absorber mounting seat structure, comprising: a rear shock absorber mounting bracket, a rear shock absorber mounting bracket reinforcement, and a rear shock absorber mounting threaded pipe;
[0006] The rear shock absorber mounting bracket reinforcement is mounted on the rear shock absorber mounting bracket, and a closed cavity is formed between the rear shock absorber mounting bracket reinforcement and the rear shock absorber mounting bracket along the Z direction;
[0007] The rear shock absorber mounting threaded tube is mounted on the rear shock absorber mounting bracket reinforcement and the rear shock absorber mounting bracket along the Z direction.
[0008] Preferably, the rear shock absorber mounting bracket reinforcement comprises: a first reinforcement, a second reinforcement and a third reinforcement connected in sequence, the second reinforcement is arranged horizontally, the first reinforcement is arranged obliquely upward relative to the second reinforcement, and the third reinforcement is arranged obliquely downward relative to the second reinforcement;
[0009] The first reinforcement member and the third reinforcement member are respectively connected to the rear shock absorber mounting bracket;
[0010] The closed cavity is formed between the first reinforcement, the second reinforcement, the third reinforcement and the rear shock absorber mounting bracket.
[0011] Preferably, the thickness of the rear shock absorber mounting bracket is between 1.8-2.2 mm.
[0012] Preferably, the height of the closed cavity along the Z direction is between 9.6-11.8 mm.
[0013] Preferably, the rear shock absorber mounting bracket reinforcement is welded to the rear shock absorber mounting bracket, and there are 2-4 welding points between the rear shock absorber mounting bracket reinforcement and the rear shock absorber mounting bracket along the Z direction.
[0014] The utility model also provides a car, comprising the above-mentioned rear shock absorber mounting seat structure.
[0015] The beneficial effects of the utility model are:
[0016] The closed cavity formed along the Z direction between the rear shock absorber mounting bracket reinforcement and the rear shock absorber mounting bracket can effectively improve the dynamic stiffness performance of the attachment point of the rear shock absorber on the rear shock absorber mounting bracket, thereby accurately achieving the project's dynamic stiffness performance target for the rear shock absorber attachment point. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a flow chart of the rear shock absorber mounting seat structure optimization design method in this embodiment;
[0018] Figure 2 is a structural schematic diagram of the rear shock absorber mounting seat structure in this embodiment;
[0019] Figure 3 It is a key design element of the rear shock absorber mounting structure in this embodiment;
[0020] Figure 4 for Figure 3 AA section view;
[0021] Figure 5 for Figure 3 BB cross-section diagram;
[0022] Figure 6 is a Pareto chart of the standardized effect in this embodiment;
[0023] Figure 7 is the Y residual graph in this embodiment;
[0024] in:
[0025] 1-Rear shock absorber mounting bracket;
[0026] 2-Rear shock absorber mounting bracket reinforcement;
[0027] 3-Rear shock absorber installation threaded tube;
[0028] 4- Closed cavity;
[0029] 21- first reinforcement member;
[0030] 22- second reinforcement member;
[0031] 23-Third reinforcement. DETAILED DESCRIPTION
[0032] In order to clearly demonstrate the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] Reference Figures 2 to 5 The present embodiment provides a rear shock absorber mounting seat structure, comprising: a rear shock absorber mounting bracket 1, a rear shock absorber mounting bracket reinforcement 2, and a rear shock absorber mounting threaded tube 3; the rear shock absorber mounting bracket reinforcement 2 is mounted on the rear shock absorber mounting bracket 1, and a closed cavity 4 is formed between the rear shock absorber mounting bracket reinforcement 2 and the rear shock absorber mounting bracket 1 along the Z direction; the rear shock absorber mounting threaded tube 3 is mounted on the rear shock absorber mounting bracket reinforcement 2 and the rear shock absorber mounting bracket 1 along the Z direction.
[0034] The closed cavity 4 formed along the Z direction between the rear shock absorber mounting bracket reinforcement 2 and the rear shock absorber mounting bracket 1 can effectively improve the dynamic stiffness performance of the attachment point of the rear shock absorber on the rear shock absorber mounting bracket, thereby accurately achieving the project's rear shock absorber attachment point dynamic stiffness performance target.
[0035] Specifically, combined Figure 4 and Figure 5 The rear shock absorber mounting bracket reinforcement 2 includes: a first reinforcement 21, a second reinforcement 22 and a third reinforcement 23 connected in sequence, the second reinforcement 22 is arranged horizontally, the first reinforcement 21 is arranged obliquely upward relative to the second reinforcement 22, and the third reinforcement 23 is arranged obliquely downward relative to the second reinforcement 22; the first reinforcement 21 and the third reinforcement 23 are respectively connected to the rear shock absorber mounting bracket 1; the aforementioned closed cavity 4 is formed between the first reinforcement 21, the second reinforcement 22, the third reinforcement 23 and the rear shock absorber mounting bracket 1.
[0036] Specifically, in this embodiment, the thickness of the rear shock absorber mounting bracket 1 is between 1.8 mm and 2.2 mm, and the selection of this parameter is based on the optimization design of the rear shock absorber mounting seat structure.
[0037] Specifically, in this embodiment, the height of the closed cavity 4 along the Z direction is between 9.6 mm and 11.8 mm, and the selection of this parameter is obtained based on the optimized design of the rear shock absorber mounting seat structure.
[0038] Specifically, in this embodiment, the rear shock absorber mounting bracket reinforcement 2 is welded to the rear shock absorber mounting bracket 1, and there are 2-4 welding points along the Z direction between the rear shock absorber mounting bracket reinforcement 2 and the rear shock absorber mounting bracket 1. The selection of this parameter is based on the optimization design of the rear shock absorber mounting seat structure.
[0039] This embodiment also provides a method for optimizing the design of the rear shock absorber mounting structure. Figure 1 As shown, the rear shock absorber mounting seat structure is optimized mainly by combining the DOE method with CAE analysis software.
[0040] The method mainly includes the following steps:
[0041] S1) Preliminary structure: Preliminary selection of the shock absorber mounting structure based on the reference vehicle, such as Figure 2 The figure is a schematic diagram of the structure of the rear shock absorber mounting seat, which is composed of a rear shock absorber mounting bracket 1, a rear shock absorber mounting bracket reinforcement 2, and a rear shock absorber mounting threaded tube 3.
[0042] S2) CAE rear shock absorber attachment point dynamic stiffness analysis: Based on the selected rear shock absorber mounting seat structure, the rear shock absorber attachment point installation stiffness analysis was performed to determine the Z-direction dynamic stiffness of 15000N / mm. The analysis result was 11682.2N / mm, which did not meet the standard.
[0043] S3) Identify key parameters: Based on the analysis of the Z-direction dynamic stiffness of the attachment point on the rear shock absorber, identify the structural design elements of the rear shock absorber mounting seat, such as Figure 3-Figure 5 As shown, it mainly includes the material thickness X1 of the rear shock absorber mounting bracket 1, the material thickness X2 of the rear shock absorber mounting bracket reinforcement 2, the Z-direction gap X3 of the closed cavity 4 between the rear shock absorber mounting bracket 1 and the rear shock absorber mounting bracket reinforcement 2, and the number of Z-direction overlap surface welds X4 between the rear shock absorber mounting bracket 1 and the rear shock absorber mounting bracket reinforcement 2. Among them, based on the reason of borrowing the reference car, X2 of the rear shock absorber mounting bracket reinforcement 2 has been fixed to 1.4mm and is not optimized. Only the material thickness X1 of the rear shock absorber mounting bracket 1, the Z-direction gap X3 of the closed cavity 4 between the rear shock absorber mounting bracket 1 and the rear shock absorber mounting bracket reinforcement 2, and the number of Z-direction overlap surface welds X4 between the rear shock absorber mounting bracket 1 and the rear shock absorber mounting bracket reinforcement 2 are optimized.
[0044] S4) DOE experimental design: determine the experimental factors.
[0045]
[0046] Table 1
[0047] Conduct DOE test: Generate DOE test plan based on the selected factors and levels. This example conducts a full factorial test with 3 factors, 2 levels and 1 midline point, and generates 9 test plans through Minitab. Specifically, 9 attachment point dynamic stiffness analyses are required to generate a DOE test plan through MINITAB software.
[0048] Using the CAE analysis model, a full-factor DOE test was conducted and data was collected and analyzed, where Y in Table 2 is the analysis result of the dynamic stiffness of the attachment point.
[0049]
[0050] Table 2
[0051] S5), DOE data analysis and regression analysis. Since the response of this embodiment is mainly concerned with the Z-direction dynamic stiffness Y of the rear shock absorber attachment point, a factor regression analysis is performed on the response Y and sub-X1, X3, and X4 to obtain the factor regression analysis result, namely Figure 6 The Pareto diagram of the effect of the Z-direction dynamic stiffness Y of the rear shock absorber attachment point shows that the P values are all less than 0.05, the model is significant, the regression equation is meaningful, the bending value is 0.054>0.05, the center point is not significant, and it belongs to a linear relationship, as shown in Table 3.
[0052]
[0053] Table 3
[0054] Perform regression analysis on the response Y and obtain the main response diagram, such as Figure 7 shown.
[0055] The regression equation for response Y is obtained: Y = 2857 + 3862 X1 + 198 X3 + 567 X4.
[0056] S6) Perform DOE response optimization: Use Minitab response optimizer to optimize. From the effect diagram of Z-axis dynamic stiffness, select the optimal solution according to the target value of 15000N / mm, and obtain the optimal solution X1=2.0, X3=10.7, X4=4.
[0057] According to the four major process requirements of body stamping, welding, painting and assembly, the structural design is partially optimized to confirm that there are no problems with the SE analysis.
[0058] S7) After optimization, CAE analysis was used to verify the indicators. After the installation stiffness analysis of the rear shock absorber attachment point, the Z-direction dynamic stiffness of the rear shock absorber attachment point reached 15259.9N / mm, which met the target. The structural optimization design of the rear shock absorber mounting seat is feasible.
[0059] The rear shock absorber mounting seat structure is optimized by combining the DOE method with CAE analysis software. The optimized rear shock absorber mounting seat structure can systematically solve the parameter design and optimization problems of the rear shock absorber mounting seat structure.
[0060] The structural design optimization is based on the target Z-direction dynamic stiffness of 15000N / mm at the rear shock absorber attachment point. Other target values can also be optimized based on this.
[0061] This embodiment also provides a car, comprising the above-mentioned rear shock absorber mounting seat structure.
[0062] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0063] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.
[0064] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, relational terms such as "first" and "second" are used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements does not include those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.
[0065] The technical solution provided by the utility model is described in detail above. The principle and implementation method of the utility model are described in this article using specific examples. The description of the above embodiments is only used to help understand the utility model, and the content of this specification should not be understood as limiting the utility model. At the same time, for those skilled in the art, according to the utility model, there will be different forms of changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived from them are still within the protection scope of the utility model.
Claims
1. A rear shock absorber mounting seat structure, characterized in that: include: A rear shock absorber mounting bracket (1), a rear shock absorber mounting bracket reinforcement (2), and a rear shock absorber mounting threaded tube (3); The rear shock absorber mounting bracket reinforcement (2) is mounted on the rear shock absorber mounting bracket (1), and a closed cavity (4) is formed between the rear shock absorber mounting bracket reinforcement (2) and the rear shock absorber mounting bracket (1) along the Z direction; The rear shock absorber mounting threaded tube (3) is mounted on the rear shock absorber mounting bracket reinforcement (2) and the rear shock absorber mounting bracket (1) along the Z direction; the rear shock absorber mounting bracket reinforcement (2) comprises: a first reinforcement (21), a second reinforcement (22) and a third reinforcement (23) connected in sequence, the second reinforcement (22) being arranged horizontally, the first reinforcement (21) being arranged obliquely upward relative to the second reinforcement (22), and the third reinforcement (23) being arranged obliquely downward relative to the second reinforcement (22); The first reinforcement member (21) and the third reinforcement member (23) are respectively connected to the rear shock absorber mounting bracket (1); The closed cavity (4) is formed between the first reinforcement member (21), the second reinforcement member (22), the third reinforcement member (23) and the rear shock absorber mounting bracket (1).
2. The rear shock absorber mounting seat structure according to claim 1, characterized in that: The thickness of the rear shock absorber mounting bracket (1) is between 1.8 mm and 2.2 mm.
3. The rear shock absorber mounting seat structure according to claim 1, characterized in that: The height of the closed cavity (4) along the Z direction is between 9.6 mm and 11.8 mm.
4. The rear shock absorber mounting seat structure according to claim 1, characterized in that: The rear shock absorber mounting bracket reinforcement (2) is welded to the rear shock absorber mounting bracket (1), and there are 2 to 4 welding points between the rear shock absorber mounting bracket reinforcement (2) and the rear shock absorber mounting bracket (1) along the Z direction.
5. A car, characterized in that: The invention comprises the rear shock absorber mounting seat structure as claimed in any one of claims 1 to 4.