C-shaped beam structure

Abstract

The utility model provides a C-shaped beam structure. The C-shaped beam structure comprises a C-shaped beam integrally formed in an injection molding mode. The C-shaped beam comprises a non-metal main body framework and a metal framework pre-embedded in the non-metal main body framework; the non-metal main body framework and the metal framework are bonded and connected to form an integrated structure; the non-metal main body framework and the metal framework are frame bodies with rigid supports; and a plurality of weight-reducing reinforcing holes are formed in the non-metal main body framework at intervals. According to the C-shaped beam, the metal framework is pre-buried in the non-metal main body framework, the requirements for the rigidity and strength of the whole structure are met, the deformation amount of the C-shaped beam is reduced, the ground clearance of the C-shaped beam is increased, and meanwhile the bending moment caused by eccentricity during bearing of the C-shaped beam is reduced.

Description

Technical Field

[0001] This application relates to the field of C-beam structure technology for automotive air suspension, and more particularly to a C-beam structure. Background Technology

[0002] Large buses often use a four-link air suspension for their rear suspension, with four air springs mounted on a C-beam. Since the C-beam is a load-bearing component, its design must ensure sufficient strength and rigidity to guarantee vehicle safety. Traditional automotive C-beams are mostly made by stamping and welding, a process involving laser cutting, stamping, welding, and machining. This process is complex, time-consuming, costly, and results in uncontrollable quality. Metal C-beam assemblies are often formed by stamping and welding, such as... Figure 1 As shown, the C-beam assembly consists of an upper C-beam 1 and a lower C-beam 2. This results in a large C-beam structure, or the need to use high-strength materials. Therefore, traditional metal C-beams weigh up to 100 kg, making transportation and suspension installation extremely inconvenient. The assembly welding is prone to stress concentration, which can damage the overall strength and lead to early fatigue fracture.

[0003] Under the requirement of lightweight, such as Figure 2 As shown, the non-metallic C-beam 3 is made of PA66 and a certain formula of glass fiber, and is injection molded. The non-metallic C-beam is lightweight, weighing no more than 60kg, and has a simple structure. However, the elastic modulus of non-metallic materials is much lower than that of metal C-beams, resulting in lower stiffness. Under the same load, its deformation is 5 times greater than that of a metal C-beam, severely affecting the vehicle's ground clearance. In the past, the design of non-metallic C-beams only considered fatigue strength, neglecting the elastic deformation of the C-beam under ultimate load and the requirement that the vehicle's ground clearance be no less than 180mm. Therefore, it is necessary to design lightweight non-metallic C-beams to enhance stiffness, reduce deformation, and increase ground clearance. Thus, in terms of meeting the requirements for lightweighting, stiffness, and strength, neither metal nor non-metallic C-beams can meet the actual application needs. Utility Model Content

[0004] This application provides a C-beam structure that ensures the overall structural stiffness and strength requirements, reduces its deformation, increases its ground clearance, and reduces the bending moment caused by eccentricity when the C-beam is under load.

[0005] The C-beam structure provided in this application includes an integrally injection-molded C-beam; the C-beam includes a non-metallic main frame and a metal frame embedded inside the non-metallic main frame; the non-metallic main frame and the metal frame are bonded together to form an integral structure; both the non-metallic main frame and the metal frame are rigid support frames; the non-metallic main frame is provided with a plurality of weight-reducing and reinforcing holes spaced apart.

[0006] In the present application, by embedding a metal framework in a non-metal main body framework, the overall structural rigidity and strength requirements are guaranteed while reducing the overall weight, reducing the deformation amount, improving the ground clearance, and reducing the bending moment caused by eccentricity when the C-shaped beam is loaded.

[0007] In a specific implementable embodiment, the non-metal main body framework is a frame body made of PA66 material and glass fiber material by mold injection molding. It has good weight reduction effect.

[0008] In a specific implementable embodiment, the non-metal main body framework has a straight section and a curved section arranged opposite to the two ends of the straight section; the end portions of the two curved sections are provided with air spring mounting positions. It improves stress distribution and reduces the bending moment caused by eccentricity when the C-shaped beam is loaded.

[0009] In a specific implementable embodiment, the plurality of weight reduction and reinforcement holes are arranged at intervals in the straight section. It further enhances the weight reduction effect and guarantees high rigidity requirement.

[0010] In a specific implementable embodiment, the metal framework is a one-piece metal frame body. The overall installation and manufacturing are more convenient.

[0011] In a specific implementable embodiment, the curved shape of the composite metal frame body is consistent with the curved shape of the non-metal main body framework. It has high matching property.

[0012] In a specific implementable embodiment, the composite metal frame body has a straight section and a curved section arranged opposite to the two ends of the straight section; the straight section is matched and embedded and bonded in the straight section; the two curved sections are matched and embedded and bonded one by one in the two curved sections. The overall connection performance is more reliable, guarantees the bonding strength, and prevents the metal framework from being easily detached during deformation under load.

[0013] In a specific implementable embodiment, the two curved sections extend to the inside of the corresponding air spring mounting positions. It has high rigidity requirement. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the existing metal C-shaped beam;

[0015] Figure 2 It is a structural schematic diagram of the existing non-metal C-shaped beam;

[0016] Figure 3 It is a structural schematic diagram of the C-shaped beam structure provided by the embodiment of the present application;

[0017] Figure 4 It is a sectional view of the C-shaped beam structure provided by the embodiment of the present application.

[0018] Reference signs:

[0019] Upper C-beam-1, lower C-beam-2;

[0020] Non-metallic C-beam-3;

[0021] Non-metallic main skeleton-10, straight part-11, curved part-12, metal skeleton-20, straight section-21, curved section-22. DETAILED DESCRIPTION

[0022] To make the objects, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to specific embodiments and drawings.

[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present disclosure should be understood as the general meaning understood by those skilled in the art to which the present disclosure belongs. The terms "first", "second" and the like used in one or more embodiments of the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "include" or "contain" and the like mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connect" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] In order to facilitate the understanding of the C-beam structure provided by the embodiments of the present application, first of all, the application scenario is explained. The metal C-beam assembly is mostly stamped and welded, as shown in Figure 1 The C-beam assembly is composed of an upper C-beam 1 and a lower C-beam 2. This brings about a larger size of the C-beam structure, or the use of high-strength materials. Therefore, the traditional metal C-beam weighs up to 100 kg, which is extremely inconvenient for transportation and suspension installation, and the assembly welding is prone to stress concentration, which destroys the overall strength and causes early fatigue fracture. Under the requirement of light weight, such as Figure 2As shown, the non-metallic C-beam 3 is made of PA66 and a certain formula of glass fiber, and is injection molded. The non-metallic C-beam is lightweight, weighing no more than 60kg, and has a simple structure. However, the elastic modulus of the non-metallic material is much lower than that of the metal C-beam, resulting in low stiffness. Under the same load, its deformation is 5 times greater than that of the metal C-beam, seriously affecting the vehicle's ground clearance. In the past, the design of non-metallic C-beams only considered fatigue strength, neglecting the elastic deformation of the C-beam under ultimate load and the requirement that the vehicle's ground clearance be no less than 180mm. Therefore, it is necessary to design the lightweight non-metallic C-beam to enhance its stiffness, reduce its deformation, and increase its ground clearance. Thus, neither metal nor non-metallic C-beams can meet the practical application requirements in terms of lightweighting, stiffness, and strength. In view of this, this application provides a C-beam structure that ensures the overall structural stiffness and strength requirements, reduces its deformation, increases its ground clearance, and simultaneously reduces the bending moment caused by eccentricity when the C-beam is under load.

[0025] refer to Figure 3 The C-beam structure provided in this application embodiment includes: an integrally injection-molded C-beam; composed of... Figure 1 and Figure 2 The diagram shows the structural schematics of existing metal C-beams and non-metallic C-beams. Metal C-beams have the advantage of high stiffness, but they are heavy and prone to early fatigue fracture. Non-metallic C-beams, while lighter, have a much lower overall modulus of elasticity and lower stiffness. Under the same load, their deformation is five times greater than that of metal C-beams, severely affecting the vehicle's ground clearance. Therefore, the integrally injection-molded C-beam of this application has high integration, achieving weight reduction while ensuring that stiffness requirements are met. The overall connection strength is stable and reliable. It adopts a combination of metal and non-metal elements, with a metal frame 20 embedded within the non-metallic main frame 10, enhancing the C-beam's stiffness while meeting lightweight requirements.

[0026] Specifically, in combination Figure 4 As shown, the C-shaped beam includes a non-metallic main frame 10 and a metal frame 20 embedded inside the non-metallic main frame 10. The non-metallic main frame 10 in this application uses the same material and manufacturing process as the non-metallic C-shaped beam 3. The non-metallic main frame 10 is a frame formed by injection molding of PA66 material and a certain proportion of glass fiber material. It has a good weight reduction effect. The difference from the processing method of the non-metallic C-shaped beam 3 is that in this application, the metal frame 20 is pre-embedded in the material when it is initially placed in the mold, followed by injection molding, resulting in a strong and reliable overall bond.

[0027] The non-metallic main frame 10 has a straight section 11 and curved sections 12 disposed at opposite ends of the straight section 11; each of the ends of the two curved sections 12 is provided with an air spring mounting position. This improves stress distribution and reduces the bending moment caused by eccentricity when the C-shaped beam is under load. To further achieve weight reduction, multiple weight-reducing reinforcing holes are spaced apart on the non-metallic main frame 10. The presence of these reinforcing holes effectively reduces the overall weight, and the rectangular or irregularly shaped holes ensure high rigidity. These multiple weight-reducing reinforcing holes are spaced apart on the straight section 11. This further enhances the weight reduction effect while ensuring high rigidity requirements.

[0028] In addition, the non-metallic main frame 10 and the metal frame 20 are bonded together to form an integral structure; both the non-metallic main frame 10 and the metal frame 20 are rigid support frames; the C-shaped beams combining the non-metallic main frame 10 and the metal frame 20 enhance the rigidity of the C-shaped beams while meeting the requirements for lightweighting.

[0029] The metal skeleton 20 is bonded to the non-metallic components to form a whole, which improves the stiffness of the C-beam, enhances its elastic modulus, and reduces the deformation rate.

[0030] Specifically, the metal frame 20 is a one-piece metal structure, making overall installation and fabrication more convenient. The bending shape of the composite metal frame is consistent with that of the non-metallic main frame 10, ensuring high compatibility. The composite metal frame has a straight section 21 and two bent sections 22 positioned at opposite ends of the straight section 21; the straight section 21 is embedded and bonded to the straight portion 11; the two bent sections 22 are embedded and bonded to the two bent portions 12 in a one-to-one correspondence. This improves overall connection reliability, ensures bonding strength, and prevents the metal frame 20 from easily detaching under load and deformation. Both bent sections 22 extend into the interior of their corresponding air spring mounting positions, providing high rigidity.

[0031] In this application, by pre-embedding a metal frame 20 in the non-metallic main frame 10, the overall structural rigidity and strength requirements are guaranteed while ensuring a reduction in overall weight, reducing its deformation, increasing its ground clearance, and reducing the bending moment caused by eccentricity when the C-shaped beam is under load.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this specification, which are not provided in detail for the sake of brevity.

[0033] Additionally, to simplify the description and discussion, and to avoid obscuring one or more embodiments of this specification, well-known power / ground connections for other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be illustrated in block diagram form to avoid obscuring one or more embodiments of this specification, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which one or more embodiments of this specification will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that one or more embodiments of this specification may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0034] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the scope of protection of this disclosure.

Claims

1. A C-beam structure, comprising an integrally injection-molded C-beam; characterized in that, The C-shaped beam includes a non-metallic main frame and a metal frame embedded within the non-metallic main frame; wherein, The non-metallic main frame is bonded to the metallic frame to form an integral structure. Both the non-metallic main frame and the metallic frame are rigid support structures. The non-metallic main frame is provided with multiple weight-reducing and reinforcing holes spaced apart.

2. The C-beam structure according to claim 1, characterized in that, The non-metallic main frame has a straight portion and curved portions disposed opposite to each other at both ends of the straight portion; Both curved sections have air spring mounting positions at their ends.

3. The C-beam structure according to claim 2, characterized in that, The plurality of weight-reducing and reinforcing holes are spaced apart in the straight section.

4. The C-beam structure according to claim 2, characterized in that, The metal frame is a one-piece metal structure.

5. The C-beam structure according to claim 3, characterized in that, The bending shape of the metal skeleton is consistent with the bending shape of the non-metallic main skeleton.

6. The C-beam structure according to claim 5, characterized in that, The metal frame has a straight segment and curved segments disposed opposite each other at both ends of the straight segment; wherein, The straight segment is embedded and bonded to the straight section; The two curved sections are matched and embedded in the two curved parts in a one-to-one manner.

7. The C-beam structure according to claim 6, characterized in that, Both curved sections extend into the interior of the corresponding air spring mounting position.

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