Front auxiliary frame assembly of passenger car
By adopting a two-piece frame body with a stamped structure and a reinforcing rib design, the problem of insufficient strength in the front subframe of passenger vehicles during the weight reduction process was solved, achieving weight reduction and performance improvement, and improving the vehicle's handling stability and NVH performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING AOTENG AUTOMOBILE PARTS CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-19
AI Technical Summary
The existing front subframe of passenger vehicles is difficult to maintain high structural strength and rigidity during the lightweighting process, which leads to a decrease in vehicle handling stability, vague steering feel, deterioration of NVH performance, and affects durability and collision safety.
The main body of the vehicle adopts a two-piece frame structure with a stamping structure, and improves the structural rigidity and strength by arranging the reinforcing ribs horizontally and vertically and by rationally distributing the welding points, while achieving weight reduction.
This approach achieves weight reduction while improving the structural strength and rigidity of the chassis, enhancing vehicle handling stability, steering feel, and NVH performance, as well as improving durability and collision safety.
Smart Images
Figure CN224256740U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts, specifically to a front subframe assembly for passenger vehicles. Background Technology
[0002] The front subframe (also known as the front chassis or engine subframe) of a passenger car is a key load-bearing and connecting component in the chassis system. Its main functions include:
[0003] Powertrain support: Provides mounting points and support for powertrain components such as engines and transmissions, and bears their weight and working loads (torque reaction force, vibration, etc.).
[0004] Steering system support: This typically provides mounting points for the steering gear.
[0005] Load transfer and distribution: During vehicle operation, it bears and transfers vertical, longitudinal (acceleration / braking) and lateral (steering) loads from the wheels and distributes them reasonably to the main load-bearing structures such as the front longitudinal beams of the vehicle body.
[0006] Improve NVH performance: Through its own structural design and the use of mounting point bushings (suspension), it isolates the transmission of powertrain vibration and road excitation to the vehicle body, thereby improving ride comfort (noise, vibration and acoustic roughness).
[0007] With the development of the automotive industry, the performance requirements for front subframes are becoming increasingly stringent and diverse. Existing designs often face the following challenges and limitations: such as the contradiction between lightweighting and balancing strength / stiffness. Driven by increasingly stringent fuel economy (fuel consumption) and emission regulations, lightweighting has become an inevitable trend. However, weight reduction (such as reducing material thickness or reducing material usage) often comes at the cost of sacrificing the overall strength, stiffness, and modal characteristics (natural frequencies) of the subframe. Insufficient stiffness leads to decreased vehicle handling stability, vague steering feel, and deterioration of NVH performance; insufficient strength affects durability and crash safety. How to effectively reduce weight while ensuring or even improving structural performance is the core challenge. Summary of the Invention
[0008] To address the shortcomings of the existing technology, this utility model provides a front subframe assembly for passenger vehicles, which has a reasonable structural design that meets the requirements of lightweighting while also having high structural strength.
[0009] To achieve the above objectives, the present invention adopts the following technical solution:
[0010] A front subframe assembly for a passenger vehicle, characterized in that: it includes a frame body, with a left front mounting bracket and a right front mounting bracket provided at the left and right ends of the front part of the frame body, rear connecting sleeves provided on the left and right sides of the rear part of the frame body, an engine mounting bracket provided in the middle of the front side of the frame body, and steering gear sleeves arranged at intervals on the left and right sides of the engine mounting bracket, the frame body including a lower frame shell and an upper frame shell, the lower frame shell and the upper frame shell being welded together, and the lower frame shell and the upper frame shell having a left longitudinal reinforcing rib, a right longitudinal reinforcing rib, and a transverse reinforcing rib inside.
[0011] Furthermore, the left front mounting bracket and the right front mounting bracket are symmetrically arranged. The left front mounting bracket includes a front plate and a rear plate welded together. A vertically arranged front connecting sleeve is welded to the upper part of the front plate and the rear plate. The lower ends of the front plate and the rear plate are welded to the lower housing of the vehicle frame. The middle parts of the front plate and the rear plate are welded to the upper housing of the vehicle frame.
[0012] Furthermore, a support reinforcing plate is welded to the lower inner side of the front plate and the rear plate of the support.
[0013] Furthermore, a front connecting member is welded to the front side of the front plate of the bracket, and the rear plate of the bracket is welded to the front end of the left longitudinal reinforcing rib plate.
[0014] Furthermore, internal reinforcing ribs are welded to both sides of the engine mounting bracket, and a steering reinforcing rib is welded to one side of the steering gear sleeve. The steering reinforcing rib and the internal reinforcing rib are welded together to form a T-shaped structure.
[0015] Furthermore, a rear connecting sleeve bracket is welded to the upper housing of the vehicle frame, the middle part of the rear connecting sleeve is welded to the rear connecting sleeve bracket, and the upper edge of the rear connecting sleeve is welded to the upper housing of the vehicle frame.
[0016] Furthermore, the left longitudinal reinforcing rib, the right longitudinal reinforcing rib, and the transverse reinforcing rib all have flipped edges at their upper and lower ends, and are welded to the lower housing and the upper housing of the frame through these flipped edges.
[0017] The beneficial effects of this utility model include: the upper and lower two-piece frame body with stamping structure achieves effective weight reduction, while optimizing the installation points; the frame structure rigidity and strength are improved through the horizontal and vertical reinforcement structure; and the reasonable distribution of welding points avoids stress concentration. Attached Figure Description
[0018] Figure 1 This is an exploded structural diagram of the present invention;
[0019] Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0020] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0021] One such Figure 1-2 The passenger vehicle front subframe assembly shown includes a frame body. Left front mounting brackets 7 and right front mounting brackets 8 are located at the left and right ends of the front part of the frame body. Rear connecting sleeves 9 are located on the left and right sides of the rear part of the frame body. An engine mounting bracket 10 is located in the middle of the front side of the frame body. Steering gear sleeves 11 are arranged at intervals on the left and right sides of the engine mounting bracket 10. The frame body includes a lower frame housing 1 and an upper frame housing 2. The upper frame housing 2 has its edges bent downwards and welded to the lower frame housing 1. The lower frame housing also has bent edges to improve structural strength. Both the upper and lower frames have concave and convex structures to further improve rigidity. The lower frame housing 1 and the upper frame housing 2 have a left longitudinal reinforcing rib 3, a right longitudinal reinforcing rib 4, and a transverse reinforcing rib 5 inside. The left longitudinal reinforcing rib 3, the right longitudinal reinforcing rib 4, and the transverse reinforcing rib 5 all have flipped edges at both ends, and are welded to the lower frame housing 1 and the upper frame housing 2 through these flipped edges. During welding, the left longitudinal reinforcing rib 3 and the right longitudinal reinforcing rib 4 are pre-welded to the upper shell 2 and then welded through the welding port at the bottom of the lower shell 1. The transverse reinforcing rib 5 is pre-welded to the inner bottom surface of the lower shell 1 and then welded through the welding port on the top surface of the upper shell 2.
[0022] like Figure 1 As shown, the left front mounting bracket 7 and the right front mounting bracket 8 are symmetrical structures with identical structures. Both include a front bracket plate 12 and a rear bracket plate 13 welded together. To reduce weight, the front bracket plate 12 and the rear bracket plate 13 are thin-plate stamped parts. Vertically arranged front connecting sleeves 14 are welded to the upper part of the front bracket plate 12 and the rear bracket plate 13. The front bracket plate 12 and the rear bracket plate 13 are welded together as a whole. The lower ends of the front bracket plate 12 and the rear bracket plate 13 are welded to the lower housing 1 of the vehicle frame, and the middle part of the front bracket plate 12 and the rear bracket plate 13 are welded to the upper housing 2 of the vehicle frame.
[0023] To enhance the structural strength of the left front mounting bracket 7 and the right front mounting bracket 8, in this embodiment, a bracket reinforcing plate 15 is welded to the lower inner side of the bracket front plate 12 and the bracket rear plate 13. A front connecting member 16 is welded to the front side of the bracket front plate 12. This structure is used to support the bracket front plate 12 from the side. The bracket rear plate 13 is welded to the front end of the left longitudinal reinforcing rib plate 3, thereby improving the lateral support strength.
[0024] Internal reinforcing ribs 17 are welded to both sides of the engine mounting bracket 10, and a steering reinforcing rib 18 is welded to one side of the steering gear sleeve 11. The steering reinforcing rib 18 and the internal reinforcing rib 17 are welded together to form a T-shaped structure. This structure provides good support and helps to improve the structural rigidity of the steering gear sleeve 11 and the engine mounting bracket 10.
[0025] A rear connecting sleeve bracket 19 is welded to the upper housing 2 of the frame. The middle part of the rear connecting sleeve 9 is welded to the rear connecting sleeve bracket 19, and the upper edge of the rear connecting sleeve 9 is welded to the upper housing 2 of the frame. Both the rear connecting sleeve bracket 19 and the rear connecting sleeve 9 are welded to the upper housing 2.
[0026] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A front subframe assembly for a passenger vehicle, characterized in that: The vehicle includes a frame body, with a left front mounting bracket (7) and a right front mounting bracket (8) at the left and right ends of the front part of the frame body. Rear connecting sleeves (9) are respectively provided on the left and right sides of the rear part of the frame body. An engine mounting bracket (10) is provided in the middle of the front side of the frame body. Steering gear sleeves (11) are arranged at intervals on the left and right sides of the engine mounting bracket (10). The frame body includes a lower frame shell (1) and an upper frame shell (2). The lower frame shell (1) and the upper frame shell (2) are welded together. The lower frame shell (1) and the upper frame shell (2) are provided with a left longitudinal reinforcing rib plate (3), a right longitudinal reinforcing rib plate (4), and a transverse reinforcing rib plate (5) inside.
2. The front subframe assembly for a passenger vehicle according to claim 1, characterized in that: The left front mounting bracket (7) and the right front mounting bracket (8) are symmetrical structures. The left front mounting bracket (7) includes a bracket front plate (12) and a bracket rear plate (13) that are welded to each other. A vertically arranged front connecting sleeve (14) is welded to the upper part of the bracket front plate (12) and the bracket rear plate (13). The lower ends of the bracket front plate (12) and the bracket rear plate (13) are welded to the lower housing (1) of the vehicle frame. The middle part of the bracket front plate (12) and the bracket rear plate (13) is welded to the upper housing (2) of the vehicle frame.
3. The front subframe assembly for a passenger vehicle according to claim 2, characterized in that: The lower inner sides of the front plate (12) and rear plate (13) of the bracket are welded with a bracket reinforcing plate (15).
4. The front subframe assembly for a passenger vehicle according to claim 2, characterized in that: The front plate (12) of the bracket is welded to the front side with a front connecting member (16), and the rear plate (13) of the bracket is welded to the front end of the left longitudinal reinforcing rib plate (3).
5. The front subframe assembly for a passenger vehicle according to claim 1, characterized in that: The engine mounting bracket (10) has internal reinforcing ribs (17) welded to its left and right sides, and the steering gear sleeve (11) has a steering reinforcing rib (18) welded to one side. The steering reinforcing rib (18) and the internal reinforcing rib (17) are welded together to form a T-shaped structure.
6. The front subframe assembly for a passenger vehicle according to claim 1, characterized in that: A rear connecting sleeve bracket (19) is welded to the upper housing (2) of the vehicle frame. The middle part of the rear connecting sleeve (9) is welded to the rear connecting sleeve bracket (19), and the upper edge of the rear connecting sleeve (9) is welded to the upper housing (2) of the vehicle frame.
7. The front subframe assembly for a passenger vehicle according to claim 1, characterized in that: The left longitudinal reinforcing rib (3), the right longitudinal reinforcing rib (4), and the transverse reinforcing rib (5) all have flipped edges at both ends, and are welded to the lower shell (1) and the upper shell (2) of the frame through these flipped edges.