Railway vehicle composite material interior fitting profile skeleton and railway vehicle

Abstract

This invention relates to a composite material interior profile frame for rail vehicles and the rail vehicle itself, belonging to the technical field of rail vehicle technology. The frame includes: crossbeams, longitudinal beams, and hanging components; the crossbeams, perpendicular to their length, include multiple horizontally arranged cavities, with waistlines extending along the length of the crossbeam in the cavities at both ends, the waistlines protruding into the cavities from the sidewalls; the longitudinal beams, perpendicular to their length, also have waistlines extending along their length in their cavities; the height of the inner surface of the crossbeam's cavity is the same as the height of the outer surface of the longitudinal beam; the hanging components are suspended in the cavities with waistlines, and the hanging components are limited by the protruding waistlines; the crossbeams and longitudinal beams are made of fiber-reinforced resin composite material, and the waistline positions are filled with composite fiber unidirectional fabric. This invention optimizes the profile cross-section and type, and the cavities in the crossbeams and longitudinal beams, along with their height settings, ensure that the inner and outer surfaces contact each other when they are interlocked, improving the connection strength at the contact points.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle technology, specifically relating to a composite material interior profile frame for rail vehicles and the rail vehicle itself. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] In rail vehicles, the interior frame modules are typically connected by aluminum alloy profiles, and the interior components are suspended from the frame. As the top-level requirements for vehicle lightweighting continue to increase, weight reduction of aluminum profiles in the interior system has reached a bottleneck. At the same time, aluminum profiles usually need to be connected by welding, and the welds have disadvantages such as poor corrosion resistance and poor fatigue resistance.

[0004] In view of this, it is urgent to explore new approaches to optimize the design of composite material interior profiles for rail vehicles in order to meet higher requirements for lightweighting and service life, such as corrosion resistance and fatigue resistance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a composite material internal frame for rail vehicles and the rail vehicle itself. Two types of composite material profile modules are designed, and the internal frame is constructed from these two profile modules. This effectively improves lightweighting and extends service life while simplifying the structure.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] In the first aspect, a composite material interior frame for a rail vehicle includes: crossbeams, longitudinal beams, and hanging components;

[0008] The crossbeam includes multiple horizontally arranged cavities in a direction perpendicular to its length. Waistlines extending along the length of the crossbeam are provided in the cavities at both ends. The waistlines protrude into the cavity from the sidewalls of the cavities.

[0009] The longitudinal beam includes an inner cavity perpendicular to its length direction, and a waistline extending along the length direction of the longitudinal beam is provided in the inner cavity. The waistline protrudes into the inner cavity from the side wall of the inner cavity.

[0010] The height of the inner surface of the crossbeam is the same as the height of the outer surface of the longitudinal beam;

[0011] The hanging component is suspended in the inner cavity with a waistline, and the hanging component is limited by the protruding waistline;

[0012] The crossbeam and the longitudinal beam are made of fiber-reinforced resin composite material, and the waistline is filled with composite fiber unidirectional fabric.

[0013] Optionally, the longitudinal beam is connected to the transverse beam by passing through it, and the outer surface of the longitudinal beam in the height direction is attached to the inner surface of the transverse beam, with an adhesive layer provided at the attachment position.

[0014] Optionally, the outer side of the connection position between the crossbeam and the longitudinal beam is connected by a covering structure in the form of co-adhesive bonding.

[0015] Optionally, the covering structure includes a composite fiber material fabric, which wraps around the periphery of the connection location.

[0016] Optionally, the outer side of the connection position between the crossbeam and the longitudinal beam is fixed by riveting.

[0017] Optionally, a rivet is attached to the outside of the connection position. The rivet is attached to the crossbeam and the longitudinal beam respectively, and the rivet is riveted to the crossbeam and the longitudinal beam respectively by multiple rivets.

[0018] Optionally, the hanging component includes a T-bolt, the bolt head of which is located between the waistline and the lower surface of the inner cavity, the T-bolt passing through the lower surface of the inner cavity and extending out of the crossbeam or the longitudinal beam.

[0019] Optionally, the lower surfaces of the crossbeams and longitudinal beams are provided with hanging component openings, which are key-shaped holes for placing and sliding the hanging components.

[0020] Optionally, the crossbeam and the longitudinal beam include a multi-layered fabric bonded together by a resin material, the multi-layered fabric including a central composite fiber unidirectional fabric and an outer composite fiber two-dimensional woven fabric.

[0021] Optionally, the main fiber direction of the central composite fiber unidirectional fabric is laid along the length direction of the longitudinal or transverse beam, and the composite fiber two-dimensional woven fabric is laid according to the set layup direction.

[0022] Optionally, the resin material is a flame-retardant resin.

[0023] Secondly, a rail vehicle includes a car body, the car body including a car body frame, the car body frame including the aforementioned rail vehicle composite material interior profile skeleton.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The composite material internal profile frame for rail vehicles provided by this invention includes crossbeams and longitudinal beams. The crossbeams and longitudinal beams are obtained by optimizing the cross-section and type of the standardized profiles based on the interface requirements of the original aluminum alloy profile modules. Internal cavities are provided in the crossbeams and longitudinal beams to improve the load-bearing capacity of the profiles. The height of both beams is designed so that the inner and outer surfaces come into contact when they are interlocked, improving the connection strength at the contact points. Compared with traditional aluminum alloy profiles, it has significant lightweight advantages and optimized properties such as corrosion resistance and fatigue resistance.

[0026] 2. The present invention provides a raised waistline in the inner cavity of the composite material interior profile skeleton of the rail vehicle. The waistline can provide a limit for the installation of the hanging parts; and the waistline can provide a reinforcing rib function to further improve the mechanical strength of the profile without dividing the inner cavity into smaller sizes.

[0027] 3. Both the crossbeams and longitudinal beams of the present invention can be prepared by composite material pultrusion molding process, which can greatly improve the preparation quality and efficiency, and effectively reduce the preparation cost. Attached Figure Description

[0028] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0029] Figure 1 This is a schematic diagram of the overall structure of the composite material interior profile skeleton of the rail vehicle in Example 1.

[0030] Figure 2 This is a schematic diagram showing the structure and dimensions of the crossbeam and longitudinal beam in Example 1.

[0031] Figure 3 This is a schematic diagram of the connection relationship between the crossbeam and the longitudinal beam in Example 1.

[0032] Figure 4 This is a schematic diagram of the joint structure of the crossbeam and longitudinal beam in Example 1.

[0033] Figure 5 This is a schematic diagram of the joint structure of the crossbeam and longitudinal beam in Example 2.

[0034] Among them, 1. crossbeam; 2. longitudinal beam; 3. joint; 4. metal connector; 5. waistline; 6. hanging parts; 7. riveting parts; 8. inner cavity; 9. composite fiber material fabric. Detailed Implementation

[0035] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention is described.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] Example 1

[0038] A composite material interior frame for a rail vehicle includes: a crossbeam 1, a longitudinal beam 2, and a suspension component 6;

[0039] like Figure 2 As shown, the crossbeam 1 has multiple horizontally arranged cavities 8 in a cross section perpendicular to its length direction. Waistlines 5 extending along the length direction of the crossbeam 1 are provided in the cavities 8 at both ends. The waistlines 5 protrude into the cavities 8 from the side walls of the cavities 8.

[0040] The longitudinal beam 2 includes an inner cavity 8 in a cross section perpendicular to its length direction. A waistline 5 extending along the length direction of the longitudinal beam 2 is provided in the inner cavity 8. The waistline 5 protrudes into the inner cavity 8 from the side wall of the inner cavity 8.

[0041] The height of the inner surface of the inner cavity 8 of the crossbeam 1 is the same as the height of the outer surface of the longitudinal beam 2, both being H;

[0042] The hanging part 6 is suspended in the inner cavity 8 where the waistline 5 is provided, and the hanging part 6 is limited by the protruding waistline 5;

[0043] The crossbeam 1 and longitudinal beam 2 are made of fiber-reinforced resin composite material, and the waistline 5 is filled with composite fiber unidirectional fabric.

[0044] Based on the above settings, the original aluminum alloy profile module is restructured and redesigned according to interface requirements, and optimized into a unified structure of crossbeam 1 and longitudinal beam 2. Crossbeam 1 and longitudinal beam 2 are only used to distinguish the profile structure and are not related to the installation direction and position in the vehicle body. Among them, when crossbeam 1 has 3 inner cavities 8, crossbeam 1 is a horizontally placed "eye" shaped structure; longitudinal beam 2 is a "mouth" shaped structure. The inner cavity 8 is provided with a protruding waistline 5 to realize the anti-rotation and limiting of the hanging part 6. Compared with the traditional integrated horizontal rib structure (the horizontal rib structure connecting opposite sides), it can effectively reduce the number of cross-sectional cavities. At the same time, it is convenient to carry out zonal layering design based on the load-bearing characteristics of the profile.

[0045] like Figure 3As shown, the longitudinal beam 2 is connected to the transverse beam 1 by passing through it, and the outer surface of the longitudinal beam 2 in the height direction is attached to the inner surface of the inner cavity 8 of the transverse beam 1. An adhesive layer is provided at the attachment position to form a stable joint inside. The fibers in the upper and lower surfaces of the transverse beam 1 are not damaged, thus avoiding the creation of a weak mechanical link in the transverse beam 1 that is penetrated.

[0046] like Figure 4 As shown, the outer side of the connection position between the crossbeam 1 and the longitudinal beam 2 is connected by a covering structure in the form of co-adhesive bonding, which further improves the integrity and reliability of the connection structure.

[0047] like Figure 3 As shown, the covering structure includes a composite fiber material fabric 9, which wraps around the perimeter of the connection position to reinforce the joint position as a whole.

[0048] like Figure 1 As shown, the intersection of the crossbeam 1 and the longitudinal beam 2 is connected by the connector 3. Metal connecting seats 4 are connected to the crossbeam 1 and the longitudinal beam 2, and other internal components are connected through the metal connecting seats 4.

[0049] like Figure 2 As shown, the hanging component 6 includes a T-bolt or a sliding nut; taking the T-bolt as an example, the bolt head of the T-bolt is located between the waistline 5 and the lower surface of the inner cavity 8, and the T-bolt passes through the lower surface of the inner cavity 8 and extends out of the crossbeam 1 or the longitudinal beam 2.

[0050] like Figure 2 As shown, the height dimensions of the multiple inner cavities 8 of the crossbeam 1 are the same, and the width of each of the multiple inner cavities 8 can be adjusted according to design requirements. For example, the width of the inner cavities 8 at both ends and the position and size of the waistline 5 in the inner cavity 8 can be adjusted according to the different specifications of the hanging parts 6.

[0051] The lower surfaces of the crossbeam 1 and the longitudinal beam 2 are provided with hanging openings. The hanging openings are key-shaped holes, including an elongated hole and a wide opening that is wider than the elongated hole and communicates with the elongated hole. These openings are used for the placement and sliding of the hanging component 6 (T-bolt or slider nut). The width of the elongated hole is less than the width of the hanging part of the hanging component 6, while the width of the wide opening is greater than the width of the hanging part of the hanging component 6.

[0052] During installation, the bolt head of the T-bolt or the nut of the slider nut extends into the opening of the hanger through the wide opening of the keyhole, is blocked by the raised waistline 5, and then slides along the direction of the long hole to adjust to the set position in the long hole, and is connected and fixed with other threaded connectors located outside the crossbeam 1 or longitudinal beam 2 to achieve the fastening installation of the bolt or slider nut.

[0053] The crossbeam 1 and the longitudinal beam 2 include a multi-layered fabric that is cured and connected by resin material. The multi-layered fabric includes a central composite fiber unidirectional fabric and an outer composite fiber two-dimensional woven fabric. The multi-layered fabric is connected by resin curing to form a whole, which effectively improves the structural performance and effectively reduces the cost of raw materials.

[0054] The composite fiber unidirectional fabric filled at the waistline 5 position is located on the outside of the multi-layered fabric and is connected to the multi-layered fabric by resin material curing to form a whole, which plays a role in mechanical reinforcement and is different from the horizontal rib structure, making it easier to install the hanging parts 6.

[0055] Composite fiber unidirectional fabric refers to a textile with a large amount of woven yarn or untwisted roving in one direction and only a small amount of fine yarn in the other direction, resulting in the fabric having all its strength in one direction; the central composite fiber unidirectional fabric can also be replaced with: large tow carbon fiber and / or high modulus glass fiber.

[0056] The main fiber direction of the central composite fiber unidirectional fabric is laid along the length of the longitudinal beam 2 or the transverse beam 1, and the composite fiber two-dimensional woven fabric is laid according to the set layup direction.

[0057] Preferably, the laying method from the inside out includes: a combination of 0 / 90° carbon fiber fabric + 0 / 90° glass fiber fabric + large tow carbon fiber + high modulus glass fiber + 0 / 90° glass fiber fabric + 0 / 90° carbon fiber fabric; wherein, the large tow carbon fiber and high modulus glass fiber act as the central composite fiber unidirectional fabric, with the fiber direction consistent with the length direction of the profile, thereby improving the pressure resistance.

[0058] The resin material is flame-retardant, meeting the fire protection requirements for rail transit.

[0059] Example 2

[0060] The difference between this embodiment and Embodiment 1 is that:

[0061] like Figure 5 As shown, the outer side of the connection position between the crossbeam 1 and the longitudinal beam 2 is fixed by riveting.

[0062] A rivet 7 is attached to the outside of the connection position. The rivet 7 is a sheet-like component that is bent into an L-shape and has two mutually perpendicular connection surfaces. The two connection surfaces of the rivet 7 are attached to the crossbeam 1 and the longitudinal beam 2 respectively, and the two connection surfaces are riveted to the crossbeam 1 and the longitudinal beam 2 respectively by multiple rivets to form a joint with stable mechanical properties.

[0063] Example 3

[0064] A rail vehicle includes a car body, which includes a car body frame. The car body frame includes the rail vehicle composite material interior profile skeleton of Embodiment 1 and / or Embodiment 2.

[0065] The crossbeam 1 serves as the primary load-bearing component, while the longitudinal beam 2 connects to the crossbeam 1 and serves as the secondary load-bearing component, together forming a grid skeleton structure that can effectively support the vehicle body.

[0066] This invention provides a composite material interior profile skeleton module for rail vehicles. It adopts a modular and standardized composite material structure design concept, optimizing the profile types to two, effectively solving problems such as the complex structure and poor fatigue and corrosion resistance of aluminum alloy profiles. Based on structural functional requirements, the profile module is structurally standardized, forming a composite material skeleton module with crossbeams as the main load-bearing element and longitudinal beams as secondary load-bearing elements. The inner cavities of the crossbeams and longitudinal beams are designed with a "cup" shape, effectively reducing the number of cross-sectional cavities compared to traditional integrated crossbeam profile cavities while meeting structural functional requirements. Simultaneously, by using a zoned layering design based on the load-bearing characteristics of the profiles, the difficulty of composite molding is reduced, improving product quality. The crossbeams and longitudinal beams employ adhesive riveting composite connections or plug-in + co-adhesive connections, effectively improving the integrity and reliability of the connection structure. The crossbeams and longitudinal beams of the profile module are made using a combination of large-tow carbon fiber, high-modulus glass fiber, and fabric materials, prepared through a composite material pultrusion molding process, achieving efficient and low-cost product manufacturing.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A composite material interior trim profile frame for a rail vehicle, characterized in that, include: Horizontal beams, longitudinal beams, and hanging components; The crossbeam includes multiple horizontally arranged cavities in a direction perpendicular to its length. Waistlines extending along the length of the crossbeam are provided in the cavities at both ends. The waistlines protrude into the cavity from the sidewalls of the cavities. The longitudinal beam includes an inner cavity perpendicular to its length direction, and a waistline extending along the length direction of the longitudinal beam is provided in the inner cavity. The waistline protrudes into the inner cavity from the side wall of the inner cavity. The height of the inner surface of the crossbeam is the same as the height of the outer surface of the longitudinal beam; The hanging component is suspended in the inner cavity with a waistline, and the hanging component is limited by the protruding waistline; The crossbeam and the longitudinal beam are made of fiber-reinforced resin composite material, and the waistline is filled with composite fiber unidirectional fabric.

2. The composite material interior frame for rail vehicles as described in claim 1, characterized in that, The longitudinal beam is connected to the transverse beam by passing through it, and the outer surface of the longitudinal beam in the height direction is in contact with the inner surface of the transverse beam, with an adhesive layer provided at the contact position.

3. The composite material interior frame for rail vehicles as described in claim 1, characterized in that, The outer sides of the connection point between the crossbeam and the longitudinal beam are connected by a covering structure in a co-bonding manner.

4. The composite material interior frame for rail vehicles as described in claim 3, characterized in that, The covering structure includes a composite fiber material fabric, which wraps around the periphery of the connection position.

5. The composite material interior frame for rail vehicles as described in claim 1, characterized in that, The outer side of the connection position between the crossbeam and the longitudinal beam is fixed by riveting.

6. The composite material interior profile frame for rail vehicles as described in claim 5, characterized in that, A rivet is attached to the outside of the connection position. The rivet is attached to the crossbeam and the longitudinal beam respectively, and the rivet is riveted to the crossbeam and the longitudinal beam respectively by multiple rivets.

7. The composite material interior frame for rail vehicles as described in claim 1, characterized in that, The hanging component includes a T-bolt, the bolt head of which is located between the waistline and the lower surface of the inner cavity, and the T-bolt passes through the lower surface of the inner cavity and extends out of the crossbeam or the longitudinal beam.

8. The composite material interior frame for rail vehicles as described in claim 1, characterized in that, The lower surfaces of the crossbeams and longitudinal beams are provided with hanging openings, which are key-shaped holes for the placement and sliding of the hanging components.

9. The composite material interior frame for rail vehicles as described in claim 1, characterized in that, The crossbeam and the longitudinal beam include a multi-layered fabric bonded together by a resin material, the multi-layered fabric including a central composite fiber unidirectional fabric and an outer composite fiber two-dimensional woven fabric.

10. The composite material interior frame for rail vehicles as described in claim 9, characterized in that, The main fiber direction of the central composite fiber unidirectional fabric is laid along the length direction of the longitudinal or transverse beam, and the composite fiber two-dimensional woven fabric is laid according to the set layup direction.

11. The composite material interior frame for rail vehicles as described in claim 9, characterized in that, The resin material is a flame-retardant resin.

12. A rail vehicle, comprising a car body, characterized in that, The vehicle body includes a vehicle body frame, which includes a composite material interior profile skeleton for rail vehicles as described in any one of claims 1-11.

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