Closed V-shaped rear torsion beam
By designing a closed V-shaped rear torsion beam and optimizing specific structures and components, the shortcomings of existing rear torsion beams in terms of lightweighting and strength were solved, thereby improving the overall vehicle safety performance and optimizing the welding stress distribution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING AOTENG AUTOMOBILE PARTS CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-01
AI Technical Summary
The existing rear torsion beam has shortcomings in terms of vehicle lightweighting and structural strength, making it difficult to simultaneously meet the requirements for overall mass, stiffness, modal performance, etc.
A closed V-shaped rear torsion beam is designed, which adopts a triangular tubular main beam and a circular tubular longitudinal beam structure, combined with components such as inverted V-shaped ribs, diagonal bracing blocks and spring discs, and optimizes the welding distribution to improve structural strength and connection stability.
The lightweight design improves the overall vehicle safety performance, avoids welding stress concentration, and enhances the torsional resistance and connection strength of the structure.
Smart Images
Figure CN224184061U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts, specifically to a closed V-shaped rear torsion beam. Background Technology
[0002] The rear torsion beam is a crucial component of the rear suspension in a vehicle's chassis system. It primarily consists of the rear torsion beam itself and the connecting structures that link it to the body, suspension mounts, and other parts. As a key structural component of the automotive chassis, the weight of the rear torsion beam is significant for overall vehicle weight reduction. Due to stringent safety requirements, its stiffness, modal characteristics, and other performance parameters are also subject to extremely demanding constraints. Therefore, precise design of the rear torsion beam is necessary, requiring comprehensive consideration not only of overall weight but also of structural strength, torsional resistance, and stress concentration. Summary of the Invention
[0003] To address the shortcomings of the existing technology, this utility model provides a closed V-shaped rear torsion beam, which has a simple structure, light weight, and high structural strength.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A closed V-shaped rear torsion beam, characterized in that: it includes a main beam and two longitudinal beams. The main beam is laterally connected to the middle of the two longitudinal beams. The main beam is a triangular tubular structure with its bottom surface concave upward to form an inverted V-shape, and has a downward-facing arc-shaped rib at the highest point of the inverted V-shape. The longitudinal beam is a circular tubular structure, and the longitudinal beam is an arc-shaped beam that bends outward. One end of the longitudinal beam is connected to a bushing tube, and the other end of the longitudinal beam is connected to a hub mounting plate. A diagonal brace is connected between the rear of the longitudinal beam and the main beam. A spring disc is connected between the rear side of the longitudinal beam and the main beam. A set of shock absorber brackets is connected to the spring disc and the longitudinal beam.
[0006] Furthermore, a shock-absorbing bushing is embedded inside the bushing tube, and the shock-absorbing bushing is hinged to a rear axle mounting bracket.
[0007] Furthermore, the spring disc has a raised spring positioning part in the middle, and multiple connecting holes are distributed on the outer periphery of the spring positioning part.
[0008] Furthermore, the edge of the spring disc has three overlapping fins, one of which extends obliquely upward and is welded laterally to the main beam, another overlapping fin is welded along the bottom surface of the connection between the main beam and the longitudinal beam, and the third overlapping fin extends vertically and is welded to the circumference of the longitudinal beam.
[0009] Furthermore, the two ends of the main beam are enlarged and welded to the longitudinal beam in a C-shaped interlocking manner.
[0010] The beneficial effects of this utility model include: reasonable structural design, light overall weight, high structural strength, improved vehicle safety performance, and reasonable welding distribution, avoiding the problem of welding stress concentration. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 This is a cross-sectional view of the present invention;
[0013] Figure 3 yes Figure 2 A magnified view of a portion of the image. Detailed Implementation
[0014] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0015] One such Figure 1-2 The closed V-shaped rear torsion beam shown includes a main beam 1 and longitudinal beams 2. There are two longitudinal beams 2, with the main beam 1 laterally connected to the middle of the two longitudinal beams 2. The main beam 1 is a triangular tubular structure, formed by stamping sheet metal and welding it into a tubular shape to form a closed beam. Its bottom surface has an upward-concave inverted V-shape along its length, and at the highest point of the inverted V-shape, there is a downward-facing arc-shaped rib 12. The two ends of the main beam 1 are bulging and welded to the longitudinal beams 2 with C-shaped seams. This structure makes the main beam 1 structurally strong, with strong torsional resistance, and less prone to breakage. The longitudinal beams 2 are circular tubular structures, facilitating lightweight construction and possessing high strength and light weight. The longitudinal beams 2 are curved outwards, and a bushing tube 3 is welded to one end of the longitudinal beam 2. A shock-absorbing bushing 8 is embedded inside the bushing tube 3, and the shock-absorbing bushing 8 is hinged to a rear axle mounting bracket 9. The other end of the longitudinal beam 2 is connected to a wheel hub mounting plate 4 for connecting to the vehicle wheel hub.
[0016] To improve connection strength and increase structural rigidity, a diagonal brace 7 is connected between the rear of the longitudinal beam 2 and the main beam 1.
[0017] A spring disc 5 is connected between the rear side of the longitudinal beam 2 and the main beam 1. A set of shock absorber brackets 6 are connected to the spring disc 5 and the longitudinal beam 2. The spring disc 5 has a raised spring positioning part 10 in the middle, and multiple connecting holes 11 are distributed on the outer periphery of the spring positioning part 10.
[0018] The spring disc 5 has three overlapping fins on its edge, and the spring disc 5 and the overlapping fins are integrally bent. One overlapping fin extends obliquely upward and is welded laterally to the main beam 1; another overlapping fin is welded along the bottom surface of the connection between the main beam 1 and the longitudinal beam 2; and the third overlapping fin extends vertically and is welded circumferentially to the longitudinal beam 2. This structure ensures strong connection stability of the spring disc and avoids stress concentration.
[0019] 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 closed V-shaped rear torsion beam, characterized in that: Includes a main beam (1) and longitudinal beams (2). There are two longitudinal beams (2). The main beam (1) is horizontally connected to the middle of the two longitudinal beams (2). The main beam (1) is a triangular tubular structure with an inverted V-shaped structure formed by an upward indentation in the middle of its bottom surface. At the highest point of the inverted V-shaped structure, there is a downward arc-shaped rib (12). The longitudinal beam (2) is a circular tubular structure. The longitudinal beam (2) is an arc-shaped structure that bends outward. One end of the longitudinal beam (2) is connected to a bushing tube (3). The other end of the longitudinal beam (2) is connected to a hub mounting plate (4). The rear part of the longitudinal beam (2) is connected to the main beam (1) with a diagonal brace (7). The rear side of the longitudinal beam (2) is connected to the main beam (1) with a spring disc (5). A set of shock absorber brackets (6) are connected to the spring disc (5) and the longitudinal beam (2).
2. The closed V-type rear torsion beam according to claim 1, characterized in that: The bushing tube (3) is fitted with a shock-absorbing bushing (8), and the shock-absorbing bushing (8) is hinged to a rear axle mounting bracket (9).
3. The closed V-type rear torsion beam according to claim 1, wherein: The spring disc (5) has a raised spring positioning part (10) in the middle, and a plurality of connecting holes (11) are distributed on the outer periphery of the spring positioning part (10).
4. A closed V-shaped rear torsion beam according to claim 1, characterized in that: The spring disc (5) has three overlapping fins on its edge. One overlapping fin extends obliquely upward and is welded to the main beam (1) laterally. Another overlapping fin is welded to the bottom surface of the connection between the main beam (1) and the longitudinal beam (2). The third overlapping fin extends vertically and is welded to the circumference of the longitudinal beam (2).
5. The closed V-type rear torsion beam according to claim 1, wherein: The main beam (1) is enlarged at both ends and is welded to the longitudinal beam (2) with a C-shaped interlocking joint.