A rear tow arm mounting point structure and a vehicle
By employing a rear longitudinal beam and a second reinforcing plate welded structure at the rear trailing arm mounting point, combined with side support plates and dust covers, a cavity structure is formed, solving the problem of insufficient rigidity and strength at the mounting point, thereby improving NVH performance and enhancing vehicle handling stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHERY AUTOMOBILE CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-10
AI Technical Summary
The existing automotive rear trailing arm mounting point structure has insufficient rigidity and strength, which leads to resonance and noise problems during vehicle operation, affecting NVH performance and handling stability. In addition, there is a risk of weld tearing, which affects the vehicle's reliability, durability and driving safety.
The structure is constructed by welding a rear longitudinal beam and a second reinforcing plate, combined with side support plates, dustproof covers, and nuts for fixed connection, forming a cavity structure. This improves the rigidity and connection strength of the installation point, and the welding process forms a stable U-shaped structure, enhancing the stability of the nut connection.
It improves the rigidity and connection strength of the rear trailing arm mounting point, reduces noise and vibration, improves NVH performance, ensures occupant survival space, and enhances vehicle handling stability and durability.
Smart Images
Figure CN224476795U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive technology, and specifically relates to a rear trailing arm mounting point structure and an automobile. Background Technology
[0002] As consumer income levels rise, the demand for automotive comfort is increasing, leading to higher design requirements for vibration and noise levels, which affect comfort, during vehicle development. The trailing arm mounting point is a critical connection between the rear suspension and the vehicle body; its stiffness and strength directly impact the vehicle's NVH performance, reliability, durability, and handling stability. The trailing arm mounting point is a significant source of vibration transmission from the rear suspension to the vehicle body. If the trailing arm mounting point has low structural stiffness modes, resonance can occur during vehicle operation, resulting in excessive excitation to the body and causing a booming sound. When the vehicle traverses bumpy roads, insufficient dynamic stiffness at the mounting point can cause significant deformation of the rear suspension, affecting handling stability. Furthermore, insufficient strength can easily lead to weld tearing, affecting fatigue durability and, in severe cases, jeopardizing vehicle safety.
[0003] Therefore, a trailing arm mounting point structure is needed that improves connection strength and meets the vehicle's NVH performance, reliability, durability, and handling stability requirements. Utility Model Content
[0004] To address the aforementioned problems, this utility model proposes a rear trailing arm mounting point structure and an automobile. The rear trailing arm mounting point structure includes a rear longitudinal beam and a second reinforcing plate. The second reinforcing plate is fixedly mounted on the upper surface of the rear longitudinal beam near its end. A nut is provided on the upper surface of the second reinforcing plate, and the nut communicates with a hole on the upper surface of the rear longitudinal beam.
[0005] Furthermore, a side support plate is provided on the upper surface of the second reinforcing plate, and the side support plate is fixedly connected to the side of the rear longitudinal beam.
[0006] Furthermore, the rear trailing arm mounting point structure also includes a first reinforcing plate, which is mounted on the upper surface of the second reinforcing plate, and there is a gap between the first and second reinforcing plates; a round hole is provided on the upper surface of the first reinforcing plate, and the nut passes through the round hole and is fixedly connected to the first reinforcing plate.
[0007] Furthermore, the rear trailing arm mounting point structure also includes a dust cover, which is installed on the upper surface of the rear longitudinal beam and passes through the groove in the middle of the second reinforcing plate and the groove in the middle of the first reinforcing plate.
[0008] Furthermore, the dust cover is located between the two nuts.
[0009] Furthermore, a rear longitudinal beam side cover plate and a sill inner plate are respectively provided on both sides of the end of the rear longitudinal beam near the second reinforcing plate.
[0010] Furthermore, the rear longitudinal beam side cover plate, the sill inner plate, and the rear longitudinal beam form a "U" shaped structure.
[0011] Furthermore, the edge of the first reinforcing plate is fixedly connected to the inner surface of the rear longitudinal beam side cover plate and the inner surface of the sill inner plate.
[0012] Furthermore, the edge of the second reinforcing plate is fixedly connected to the inner surface of the rear longitudinal beam side cover plate and the inner surface of the sill inner plate.
[0013] An automobile, characterized in that it includes a body and the aforementioned rear trailing arm mounting point structure, wherein the rear trailing arm mounting point structure is mounted in the body.
[0014] The beneficial effects of this utility model are:
[0015] 1. The rear trailing arm mounting point structure of this utility model provides a simple and high-strength rear trailing arm mounting point structure by welding the rear longitudinal beam and the second reinforcing plate together, and welding a nut on the second reinforcing plate.
[0016] 2. The rear trailing arm mounting point structure of this utility model has a side support plate provided on the upper surface of the second reinforcing plate, and the side support plate is fixedly connected to the side of the rear longitudinal beam; it can more effectively improve the stiffness in the Y direction at the rear trailing arm mounting point and the transmission of collision energy by side collision, reduce the deformation of the B-pillar and side door area, so as to ensure the survival space of the occupants.
[0017] 3. The nut of the rear trailing arm mounting point structure of this utility model is fixedly connected to the first reinforcing plate and the second reinforcing plate, thereby improving the stability of the nut connection. Since a cavity is formed between the first reinforcing plate, the second reinforcing plate, the rear longitudinal beam side cover 4 and the sill inner plate, noise reduction and connection strength are achieved, while vibration is weakened, thus obtaining better NVH (Noise, Vibration and Harshness) performance.
[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the rear trailing arm mounting point structure in an embodiment of this utility model is shown.
[0021] Figure 2 A schematic diagram of the rear trailing arm reinforcing plate assembly in an embodiment of the present invention is shown.
[0022] Figure 3 A top view schematic diagram of the rear trailing arm mounting point structure in an embodiment of this utility model is shown.
[0023] Figure 4 It shows Figure 3 A schematic diagram at point AA.
[0024] Figure 5 A three-dimensional schematic diagram of the rear trailing arm mounting point structure in an embodiment of this utility model is shown.
[0025] In the diagram, 1. Rear longitudinal beam; 2. First reinforcing plate; 3. Dustproof cover; 4. Rear longitudinal beam side cover plate; 5. Second reinforcing plate; 51. Side support plate; 6. Inner sill plate; 7. Nut. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] refer to Figure 1A rear trailing arm mounting point structure includes a rear longitudinal beam 1 and a second reinforcing plate 5. The second reinforcing plate 5 is fixedly mounted on the upper surface of the rear longitudinal beam 1 near its end. A nut 7 is provided on the upper surface of the second reinforcing plate 5, and the nut 7 communicates with a hole on the upper surface of the rear longitudinal beam 1. Specifically, the nut 7 is welded to the second reinforcing plate 5 by carbon dioxide shielded welding. The second reinforcing plate 5 and the dust cover 3 are welded to the upper surface of the rear longitudinal beam 1 by welding (i.e., spot welding). A coaxial circular hole is provided on the rear longitudinal beam 1, the first reinforcing plate 2, and the second reinforcing plate 5 corresponding to the nut 7. The circular hole on the rear longitudinal beam 1 is located below the nut 7 and communicates with the nut 7. The circular holes on the first reinforcing plate 2 and the second reinforcing plate 5 are both installed on the outside of the nut 7. The first reinforcing plate 2 and the second reinforcing plate 5 are both welded to the outside of the nut 7.
[0028] This utility model provides a simple and high-strength rear trailing arm mounting point structure by welding the rear longitudinal beam 1 and the second reinforcing plate 5 together, and welding a nut 7 onto the second reinforcing plate 5. This structure is easy to manufacture and connect. The nut 7 is used to install the M14 bolts of the trailing arm, thereby facilitating the connection of the vehicle's rear suspension.
[0029] refer to Figure 5 The second reinforcing plate 5 has a side support plate 51 on its upper surface, which is fixedly connected to the side of the rear longitudinal beam 1. Specifically, the bottom surface of the side support plate 51 is fixedly connected to the second reinforcing plate 5, and both ends of the side support plate 51 are fixedly connected to the rear longitudinal beam 1. The two sides of the rear longitudinal beam 1 are bent upward to form a U-shaped structure, which facilitates the welding of the rear longitudinal beam 1 to the rear longitudinal beam side cover plate 4 and the sill inner plate 6. The side support plate 51 on the second reinforcing plate 5 is connected to the rear longitudinal beam 1. This can more effectively improve the stiffness in the Y direction at the rear trailing arm mounting point and the transmission of collision energy in side collisions, reduce the deformation of the B-pillar and side door area, and ensure the survival space of the occupants.
[0030] In the above embodiments, another optional implementation is that a side support plate 51 is provided on the upper surface of the second reinforcing plate 5, and the side support plate 51 is fixedly connected to the side of the rear longitudinal beam 1. Specifically, the second reinforcing plate 5 is formed by bending to form the side support plate 51. The two ends of the side support plate 51 are fixedly connected to the rear longitudinal beam 1, and the two sides of the rear longitudinal beam 1 are bent upward to form a U-shaped structure, which facilitates the welding of the rear longitudinal beam 1 to the rear longitudinal beam side cover plate 4 and the sill inner plate 6. The side support plate 51 is provided on the second reinforcing plate 5 and is connected to the rear longitudinal beam 1. This can more effectively improve the stiffness in the Y direction at the rear trailing arm mounting point and the transmission of collision energy in side collisions, reduce the deformation of the B-pillar and side door area, and ensure the survival space of the occupants.
[0031] refer to Figure 4The rear trailing arm mounting point structure also includes a first reinforcing plate 2, which is mounted on the upper surface of a second reinforcing plate 5, with a gap between the two plates. A circular hole is provided on the upper surface of the first reinforcing plate 2, through which the nut 7 passes and is fixedly connected to the first reinforcing plate 2. Specifically, the nut 7's fixed connection with the first and second reinforcing plates 2 and 5 improves the stability of the connection. Because a cavity is formed between the first reinforcing plate 2, the second reinforcing plate 5, the rear longitudinal beam side cover plate 4, and the sill inner plate 6, noise reduction and improved connection strength are achieved, while vibration is weakened, resulting in better NVH (Noise, Vibration, and Harshness) performance.
[0032] refer to Figure 3 The rear trailing arm mounting point structure also includes a dust cover 3, which is installed on the upper surface of the rear longitudinal beam 1 and passes through the groove in the middle of the second reinforcing plate 5 and the groove in the middle of the first reinforcing plate 2. Specifically, the dust cover 3 is welded to the rear longitudinal beam 1, the first reinforcing plate 2, and the second reinforcing plate 5, thereby improving the connection strength. The dust cover 3 is located between two nuts 7.
[0033] refer to Figure 3 The rear longitudinal beam 1 is provided with a rear longitudinal beam side cover plate 4 and a sill inner plate 6 on both sides of the end near the second reinforcing plate 5. The rear longitudinal beam side cover plate 4 and the sill inner plate 6 are spot welded to both sides of the rear longitudinal beam 1 to form a U-shaped structure, which improves structural stability.
[0034] Furthermore, the rear longitudinal beam side cover plate 4, the sill inner plate 6, and the rear longitudinal beam 1 form a "U"-shaped structure. The rear longitudinal beam side cover plate 4 and the sill inner plate 6 are spot-welded to both sides of the rear longitudinal beam 1, forming an overall U-shaped structure, which further enhances the structural stability and strengthens the structure of this invention.
[0035] Furthermore, the edge of the first reinforcing plate 2 is fixedly connected to the inner surface of the rear longitudinal beam side cover plate 4 and the inner surface of the sill inner plate 6. The edge of the second reinforcing plate 5 is also fixedly connected to the inner surface of the rear longitudinal beam side cover plate 4 and the inner surface of the sill inner plate 6. This utility model's automotive rear trailing arm mounting point structure has a simple installation structure, good structural strength, and good NVH performance, possessing strong practicality and good application prospects.
[0036] Example 2,
[0037] In this invention, the rear longitudinal beam 1 is connected to the rear longitudinal beam side cover plate 4 and the sill inner plate 6 on both sides. A second reinforcing plate 5 is provided on the rear longitudinal beam 1, and two nuts 7 are provided on the second reinforcing plate 5 to correspond to the installation of the trailing arm. A first reinforcing plate 2 is installed on the second reinforcing plate 5. The first reinforcing plate 2 improves the stability of the connection of the nuts 7. Through the above settings, better NVH performance can be obtained during installation.
[0038] In this utility model, the rear longitudinal beam side cover plate 4 and the sill inner plate 6 are spot welded to both sides of the rear longitudinal beam 1 to form a U-shaped structure, which has better structural stability.
[0039] In this utility model, reference Figure 2 The rear trailing arm reinforcement plate assembly includes a second reinforcement plate 5 and two nuts 7 on both sides of the second reinforcement plate 5 for mounting the trailing arm. The rear trailing arm reinforcement plate assembly, together with the dust cover 3, is spot-welded to the rear longitudinal beam 1. Finally, the first reinforcement plate 2 is then connected to the second reinforcement plate 5, nuts 7, dust cover 3, and rear longitudinal beam 1 via spot welding and CO2 shielded welding to form a stable connection structure.
[0040] In this invention, the second reinforcing plate 5 is provided with a side support plate 51, which is connected to the rear longitudinal beam 1. This can more effectively improve the stiffness in the Y direction at the trailing arm mounting point and the transmission of collision energy during side impacts, reducing the deformation of the B-pillar and side door areas to ensure the survival space for occupants. The first reinforcing plate 2 is located in the cavity above the nut 7 to enhance the stiffness of the trailing arm mounting point and better meet usage requirements. It can provide good support for the rear connecting plate of the sill beam, thereby improving the lateral structural strength at the sill position and effectively preventing the sill from flipping inward.
[0041] Example 3,
[0042] An automobile includes a body and a rear trailing arm mounting point structure as described in Embodiment 1 or Embodiment 2, the rear trailing arm mounting point structure being mounted in the body.
[0043] Specifically, the trailing arm mounting bolt is installed in the nut 7. The trailing arm mounting point structure provides excellent support for the rear connecting plate of the sill beam, thereby improving the lateral structural strength at the sill position and effectively preventing the sill from flipping inward. The first reinforcing plate 2 is located in the upper cavity corresponding to the nut 7 to enhance the rigidity of the trailing arm mounting point and better meet usage requirements. It provides excellent support for the rear connecting plate of the sill beam, thereby improving the lateral structural strength at the sill position and effectively preventing the sill from flipping inward.
[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
[0045] In the description of this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this utility model without contradiction.
Claims
1. A rear trailing arm mounting point structure, characterized in that, It includes a rear longitudinal beam (1) and a second reinforcing plate (5). The second reinforcing plate (5) is fixedly installed on the upper surface of the rear longitudinal beam (1) near the end. A nut (7) is provided on the upper surface of the second reinforcing plate (5). The nut (7) communicates with a hole on the upper surface of the rear longitudinal beam (1).
2. The rear trailing arm mounting point structure according to claim 1, characterized in that, The upper surface of the second reinforcing plate (5) is provided with a side support plate (51), which is fixedly connected to the side of the rear longitudinal beam (1).
3. The rear trailing arm mounting point structure according to claim 1, characterized in that, The rear trailing arm mounting point structure also includes a first reinforcing plate (2), which is installed on the upper surface of the second reinforcing plate (5), and there is a gap between the first reinforcing plate (2) and the second reinforcing plate (5); a round hole is provided on the upper surface of the first reinforcing plate (2), and the nut (7) passes through the round hole and is fixedly connected to the first reinforcing plate (2).
4. The rear trailing arm mounting point structure according to claim 3, characterized in that, The rear trailing arm mounting point structure also includes a dust cover (3), which is installed on the upper surface of the rear longitudinal beam (1) and passes through the groove in the middle of the second reinforcing plate (5) and the groove in the middle of the first reinforcing plate (2).
5. The rear trailing arm mounting point structure according to claim 4, characterized in that, The dust cover (3) is located between the two nuts (7).
6. The rear trailing arm mounting point structure according to claim 3, characterized in that, The rear longitudinal beam (1) is provided with a rear longitudinal beam side cover plate (4) and a threshold inner plate (6) on both sides of the end near the second reinforcing plate (5).
7. A rear trailing arm mounting point structure according to claim 6, characterized in that, The rear longitudinal beam side cover plate (4), the sill inner plate (6), and the rear longitudinal beam (1) form a "U" shaped structure.
8. A rear trailing arm mounting point structure according to claim 6 or 7, characterized in that, The edge of the first reinforcing plate (2) is fixedly connected to the inner surface of the rear longitudinal beam side cover plate (4) and the inner surface of the sill inner plate (6).
9. A rear trailing arm mounting point structure according to claim 6 or 7, characterized in that, The edge of the second reinforcing plate (5) is fixedly connected to the inner surface of the rear longitudinal beam side cover plate (4) and the inner surface of the sill inner plate (6).
10. A car, characterized in that, The vehicle includes a vehicle body and a rear trailing arm mounting point structure as described in any one of claims 1-9, wherein the rear trailing arm mounting point structure is mounted in the vehicle body.