Lightweight outer sleeve for auxiliary conical spring of air spring

Abstract

The present application relates to the technical field of air spring, in particular to a lightweight outer cover for air spring auxiliary spring, the lightweight outer cover comprises an integrated reinforcing framework and a cladding body, the reinforcing framework is a metal structural framework, comprising a metal partition plate and an upper support body, the cladding body is a composite cladding body, and the cladding body is integrally formed on the surface of the reinforcing framework by injection molding or casting, the lightweight outer cover of the present application can realize green low-carbon recycling while ensuring lightweight, can reduce the number of connected parts, reduce safety hazards, reduce costs, and can flexibly configure a material composite system according to actual stress working conditions, has high design freedom and high processing and preparation efficiency.

Description

Technical Field

[0001] This invention relates to the field of air spring technology, and specifically provides a lightweight outer casing for an auxiliary conical spring used in air springs. Background Technology

[0002] The air spring is an important elastic damping component in the secondary suspension of the bogie elastic suspension system of a railcar. It is installed between the train car body and the bogie and bears the vertical and horizontal loads between the car body and the bogie. The main functions of the air spring are to provide a comfortable ride, improve driving safety, and reduce the impact on the track and vehicle structure.

[0003] The air springs used in rails have a complex structure, usually assembled from multiple components such as an upper cover plate, air bladder, upper buckle, wear-resistant plate, support plate, and auxiliary conical spring. Currently, most components are made of metal materials, which makes the system's carbon emission factor high, and the weight heavy, resulting in high raw material costs. Therefore, it is necessary to make the air springs lighter.

[0004] The auxiliary conical spring is an important component of the track air spring. In the existing auxiliary conical springs, the outer casing is mainly made of metal, which has the problems of large weight and high carbon emissions, and does not meet the requirements of low carbon and environmental protection. Therefore, it is necessary to design the outer casing of the auxiliary conical spring in the air spring to reduce weight and carbon emissions while ensuring strength performance. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a lightweight outer casing for an auxiliary conical spring used in air springs. This casing reduces weight while maintaining the overall performance of the air spring, achieving a carbon reduction effect and improving the fatigue life and performance of the conical spring.

[0006] The present invention provides a lightweight outer casing for an auxiliary conical spring for an air spring, comprising an integrally molded casing and a reinforcing skeleton. The reinforcing skeleton includes a metal partition and an upper support. The reinforcing skeleton is a metal structural skeleton, and the casing is a composite material structure.

[0007] Furthermore, the metal partition and the upper support are connected by welding; the covering is a short-cut fiber reinforced nylon composite material or a monomer cast nylon material, and the covering is integrally formed on the surface of the reinforcing skeleton by injection molding or casting.

[0008] Furthermore, the metal partition is a conical plate structure with an inner diameter that gradually increases from top to bottom; the metal partition is connected to the inner wall of the covering body; or the metal partition is connected to the interior of the covering body; or the metal partition is connected to the outer wall of the covering body; or the metal partition is provided on both the outer wall and the interior of the covering body; or the metal partition is provided on the outer wall, the inner wall, and the interior of the covering body.

[0009] Furthermore, the upper support body includes an outer ring body welded to the upper end of the metal partition and embedded in the outer sleeve, with a support plate for the air spring provided at the upper end of the outer ring body; or the support plate for the air spring is provided inside the outer ring body, that is, the upper support body is integrally formed by the outer ring body and the support plate.

[0010] Furthermore, the metal partition is connected to the inner wall of the covering body, and the lower inner side of the outer ring body is welded to the top of the metal partition.

[0011] Furthermore, a dovetail tenon is provided on the outer circumferential surface of the outer ring body extending outward; the dovetail tenon is embedded in the covering body; a dovetail groove is provided on the inner wall of the top of the covering body, and the outer edge of the outer ring body and the inner edge of the top of the covering body are engaged by the dovetail tenon and the dovetail groove.

[0012] Furthermore, the upper support body includes an outer ring body welded to the upper end of the metal partition and located above the outer jacket; a support plate for the air spring is provided at the upper end of the outer ring body; or the support plate for the air spring is provided inside the outer ring body, that is, the upper support body is integrally formed by the outer ring body and the support plate.

[0013] Furthermore, the metal partition is connected to the outer wall of the covering and extends into the interior of the covering; the lower outer side of the outer ring is welded to the top of the metal partition.

[0014] Furthermore, a support base is provided at the upper end of the covering body, located above the upper support body; metal partitions are provided on the inner wall and inside the covering body, namely a first partition connected to the inner wall of the covering body and a second partition connected to the inside of the covering body.

[0015] Furthermore, the upper support is welded to the top of the first and second partitions, and the upper support is connected to the bottom of the support base.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: This solution replaces the traditional bolted connection split solution by designing the reinforcing skeleton and the covering body as an integrated composite structure, eliminating bolts, washers and other connecting parts, simplifying the types and quantities of parts, simplifying the collaborative design of the mandrel and the outer sleeve, reducing the overall assembly process, improving production efficiency, eliminating the safety hazards caused by loose bolts, and at the same time, while ensuring the overall performance of the air spring, reducing the weight of the outer sleeve, achieving the goal of lightweighting, improving material utilization, reducing material waste, lowering processing costs, and improving carbon emissions in the production process, thus achieving the technical effect of carbon reduction and emission reduction. Attached Figure Description

[0017] Figure 1 This is a partial structural diagram of the auxiliary conical spring of an air spring in the prior art; Figure 2 This is a schematic diagram of the outer casing provided according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the outer casing provided according to Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the outer casing provided according to Embodiment 3 of the present invention; Figure 5 This is a schematic diagram of the outer casing provided according to Embodiment 4 of the present invention.

[0018] The reference numerals in the attached drawings include: spindle 1, outer sleeve 2, rubber body 3, wear plate 4, airbag 5, covering body 6, metal partition 7, outer ring 12, dovetail tenon 13, support plate 14, support base 15, first partition 16, second partition 17, connecting platform 33. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided in conjunction with the appendix. Figure 1-5 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and do not constitute a limitation thereof. Example 1

[0020] The auxiliary conical spring in the existing air spring technology, such as Figure 1 As shown, the auxiliary conical spring includes a spindle 1, an outer sleeve 2, and a rubber body 3 located between the spindle 1 and the outer sleeve 2. The upper end of the outer sleeve 2 is provided with a wear plate 4, and an air bladder 5 is provided on the outer side of the outer sleeve 2 and the wear plate 4. A support plate 14 is provided between the outer sleeve 2 and the wear plate 4. In the prior art, the support plate 14 and the outer sleeve 2 are connected by bolts, and the outer sleeve 2 is a metal structure.

[0021] This embodiment describes a lightweight outer casing for an auxiliary conical spring used in an air spring, such as... Figure 2 As shown, the lightweight jacket 2 includes an integrally molded cover body 6 and a reinforcing skeleton. The reinforcing skeleton includes a metal partition 7 and an upper support body. The reinforcing skeleton is a metal structural skeleton, and the cover body 6 is a composite material structure. The metal partition 7 and the upper support body are connected by welding to form a metal skeleton. The skeleton is placed in a mold and molded by casting nylon material to prepare a metal-plastic composite structure. The cover body 6 is a short-cut fiber reinforced nylon composite material or a monomer cast nylon material. The cover body 6 is integrally molded onto the surface of the reinforcing skeleton by injection molding or casting. In this embodiment, the cover body 6 is made of monomer cast nylon material and is integrally molded onto the surface of the reinforcing skeleton by casting.

[0022] like Figure 2As shown, the metal partition 7 is a tapered plate structure with an inner diameter that gradually increases from top to bottom. The tapered structure of the metal partition 7 can be adapted to the inward shrinkage characteristics during the molding process of cast nylon material, thereby improving the interfacial bonding strength between the covering body 6 and the metal partition 7. At the same time, the metal partition 7 is formed by tubular stamping, which can reduce material waste and lower processing costs.

[0023] The metal partition 7 is connected to the inner wall of the covering body 6. The upper support body includes an outer ring 12 welded to the upper end of the metal partition 7 and embedded in the outer sleeve 2. A dovetail tenon 13 extends outward on the outer circumferential surface of the outer ring 12. The dovetail tenon 13 is embedded in the covering body 6. The inner side of the lower end of the outer ring 12 is welded to the top of the metal partition 7. A dovetail groove is formed on the inner wall of the top of the covering body 6. The outer edge of the outer ring 12 and the inner edge of the top of the covering body 6 are engaged by the dovetail tenon 13 and the dovetail groove. That is, the dovetail tenon 13 can form an inverted structure, which is suitable for the inward shrinkage characteristic during the molding process of cast nylon material. It can further improve the interface bonding strength between the covering body 6 and the outer ring 12. In this embodiment, the air spring support plate 14 (such as Figure 1 (As shown) It is set at the upper end of the outer ring body 12. Figure 2 Support plate 14 is not shown. Example 2

[0024] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the metal partition 7 is connected to the inner wall of the covering body 6, and the air spring support plate 14 is set inside the outer ring body 12. That is, the upper support body is integrally formed by the outer ring body 12 and the support plate 14, which replaces the support plate and bolt connection method in the prior art and simplifies the number of parts. In this embodiment, the covering body 6 is made of monolithically cast nylon material, and the covering body 6 is integrally formed on the surface of the metal partition 7 and the outer ring body 12 by casting. Example 3

[0025] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the upper support body includes an outer ring 12 welded to the upper end of the metal partition 7 and located above the outer sleeve 2, and a support plate 14 with an air spring is provided at the upper end of the outer ring 12 (this support plate 14 is... Figure 1 The existing support plate 14 in the prior art, or the support plate 14 of the air spring is set inside the outer ring body 12, that is, the upper support body is integrally formed by the outer ring body 12 and the support plate 14, such as Figure 4 As shown, in this embodiment, the support plate 14 is disposed inside the outer ring body 12, and the outer ring body 12 and the support plate 14 are integrally formed. In this embodiment, the covering body 6 is made of short-cut fiber reinforced nylon material, and the covering body 6 is integrally formed on the surface of the metal partition 7 and the outer ring body 12 by injection molding.

[0026] The metal partition 7 is connected to the outer wall of the covering body 6 and extends into the interior of the covering body 6. The lower outer side of the outer ring 12 is welded to the top of the metal partition 7. In this embodiment, the metal partition 7 has the function of enhancing the structural strength, separating the inner and outer rings of the injection-molded nylon covering body 6, satisfying the processing thickness capability of existing injection-molded nylon parts, reducing processing defects, and improving product performance. Example 4

[0027] like Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the upper end of the covering body 6 extends to provide a support seat 15 located above the upper support body. In this embodiment, the upper support body is as follows: Figure 5 As shown in Figure K, metal partitions 7 are provided on the inner wall and inside the covering body 6, namely a first partition 16 connected to the inner wall of the covering body 6 and a second partition 17 connected to the inside of the covering body 6. The upper support is welded to the top of the first partition 16 and the second partition 17, and the upper support is connected to the bottom of the support base 15.

[0028] The upper support includes connecting platforms 33 on both sides. The connecting platforms 33 extend to the outside of the second partition 17 and are embedded in the covering body 6 to form a riveting structure, which can greatly improve the interfacial bonding strength between the nylon body and the metal. In this embodiment, the covering body 6 is made of short-cut fiber reinforced nylon material. The covering body 6 is integrally formed on the surface of the upper support, the first partition 16 and the second partition 17 by injection molding.

[0029] The integrated structure in this solution replaces the bolt connection scheme, simplifying the number of parts. The first partition 16 and the second partition 17 are welded to the upper support body, serving as a metal skeleton that enhances the structural strength and rigidity. The skeleton is placed in a mold and injection molded with nylon material to prepare a steel-plastic composite structure. The first partition 16 and the second partition 17 can separate the inner and outer rings of injection-molded nylon, meeting the processing thickness requirements of existing injection-molded nylon parts, reducing processing defects, and improving product performance.

[0030] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0031] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A lightweight outer casing for an auxiliary conical spring used in air springs, characterized in that, The lightweight jacket (2) includes an integrally molded cover (6) and a reinforcing skeleton, the reinforcing skeleton including a metal partition (7) and an upper support; the reinforcing skeleton is a metal structural skeleton, and the cover (6) is a composite material structure.

2. The lightweight outer casing of the auxiliary conical spring for an air spring according to claim 1, characterized in that, The metal partition (7) and the upper support are connected by welding; the covering body (6) is a short-cut fiber reinforced nylon composite material or a monomer cast nylon material, and the covering body (6) is integrally formed on the surface of the reinforcing skeleton by injection molding or casting.

3. The lightweight outer casing of the auxiliary conical spring for an air spring according to claim 1 or 2, characterized in that, The metal partition (7) is a tapered plate structure with an inner diameter that gradually increases from top to bottom; the metal partition (7) is connected to the inner wall of the covering body (6); or the metal partition (7) is connected to the inside of the covering body (6); or the metal partition (7) is connected to the outer wall of the covering body (6); or the metal partition (7) is provided on both the outer wall and the inside of the covering body (6); or the metal partition (7) is provided on the outer wall, the inner wall and the inside of the covering body (6).

4. The lightweight outer casing of the auxiliary conical spring for the air spring according to claim 3, characterized in that, The upper support body includes an outer ring body (12) welded to the upper end of the metal partition (7) and embedded in the outer sleeve (2), and an air spring support plate (14) is provided at the upper end of the outer ring body (12); or the air spring support plate (14) is provided in the outer ring body (12), that is, the upper support body is integrally formed by the outer ring body (12) and the support plate (14).

5. The lightweight outer casing of the auxiliary conical spring for the air spring according to claim 4, characterized in that, The metal partition (7) is connected to the inner wall of the covering body (6), and the lower inner side of the outer ring body (12) is welded to the top of the metal partition (7).

6. The lightweight outer casing of the auxiliary conical spring for an air spring according to claim 5, characterized in that, The outer ring body (12) has a dovetail tenon (13) extending outward on its outer circumferential surface; the dovetail tenon (13) is embedded in the covering body (6); a dovetail groove is provided on the top inner wall of the covering body (6), and the outer edge of the outer ring body (12) and the inner edge of the top of the covering body (6) are engaged by the dovetail tenon (13) and the dovetail groove.

7. The lightweight outer casing of the auxiliary conical spring for the air spring according to claim 3, characterized in that, The upper support body includes an outer ring body (12) welded to the upper end of the metal partition (7) and located above the outer jacket (2); a support plate (14) for an air spring is provided at the upper end of the outer ring body (12); or the support plate (14) for the air spring is provided inside the outer ring body (12), that is, the upper support body is integrally formed by the outer ring body (12) and the support plate (14).

8. The lightweight outer casing of the auxiliary conical spring for an air spring according to claim 7, characterized in that, The metal partition (7) is connected to the outer wall of the covering body (6) and extends into the interior of the covering body (6); the lower outer side of the outer ring body (12) is welded to the top of the metal partition (7).

9. The lightweight outer casing for the auxiliary conical spring of the air spring according to claim 3, characterized in that, The upper end of the covering body (6) is provided with a support seat (15) located above the upper support body; metal partitions (7) are provided on the inner wall and inside the covering body (6), namely a first partition (16) connected to the inner wall of the covering body (6) and a second partition (17) connected to the inside of the covering body (6).

10. The lightweight outer casing of the auxiliary conical spring for an air spring according to claim 9, characterized in that, The upper support is welded to the top of the first partition (16) and the second partition (17), and the upper support is connected to the bottom of the support base (15).

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