A skirt, a vehicle equipment compartment and a rail vehicle

Abstract

The application discloses a skirt plate, a vehicle equipment cabin and a railway vehicle, relates to the technical field of railway vehicles, and the skirt plate comprises a body composed of a double-layer profile, an inner rib is arranged in the body, and the inner rib and the body form a continuous trapezoidal cavity array distributed along the length direction of the body. The continuous cavity array divides the overall structure into a plurality of independent small chambers, which can effectively disperse the stress generated by external load. Meanwhile, the trapezoidal cavity structure optimizes the stress distribution through geometric symmetry, so as to realize uniform stress distribution, reduce stress concentration and avoid fatigue damage caused by local stress concentration. The arrangement can not only realize lightweight, but also make the skirt plate structure more stable, thereby solving the problem that the existing aluminum alloy skirt plate cannot meet the requirements of lightweight and stability.

Description

Technical Field

[0001] This application relates to the field of rail vehicle technology, and in particular to a skirt, vehicle equipment compartment and rail vehicle. Background Technology

[0002] Currently, an equipment compartment is usually installed under the rail vehicle. Inside the enclosed space of the equipment compartment, cable trays, conduits and other under-vehicle equipment are installed to prevent damage from stone impacts, freezing and other hazards that may occur during high-speed operation.

[0003] In the existing system, the equipment compartment skirt is bolted to the lower side beam of the vehicle body at the upper end and to the equipment compartment frame at the lower end. However, the current equipment compartment skirt is made of aluminum alloy. Although aluminum alloy is a lightweight material, its strength is relatively low. Considering that the equipment compartment needs to accommodate various equipment and withstand complex operating conditions such as vibration and aerodynamic pressure during high-speed operation, the aluminum alloy skirt is prone to structural deformation under these conditions, which cannot guarantee the stability and safety of the equipment compartment.

[0004] Therefore, how to avoid the inability of existing aluminum alloy skirting panels to simultaneously meet the requirements of lightweighting and stability is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a skirt, vehicle equipment compartment and rail vehicle that solves the problem that existing aluminum alloy skirts cannot simultaneously meet the requirements of lightweight and stability.

[0006] To achieve the above objectives, this application provides a skirt panel, including a body made of double-layer profiles, with internal ribs inside the body, and the internal ribs and the body forming a continuous trapezoidal cavity array distributed along the length direction of the body.

[0007] In some embodiments, the body includes an inner profile and an outer profile, the inner profile having a first overlap and the outer profile having a second overlap, both the first overlap and the second overlap extending away from the continuous trapezoidal cavity array, the first overlap and the second overlap overlapping joint and forming a first plate protruding a certain length from the continuous trapezoidal cavity array.

[0008] In some embodiments, the inner profile further has a first connecting portion extending along a first preset direction, and the outer profile further has a second connecting portion extending along a second preset direction. The first connecting portion and the second connecting portion are joined together to form an interface for bolt installation.

[0009] In some embodiments, the first preset direction and the second preset direction are the same, the first connecting part and the second connecting part are connected to form a second plate body with a certain length of protruding continuous trapezoidal cavity array, the interface is provided on the second plate body, and the angle between the second plate body and the length direction of the body is less than 90 degrees.

[0010] In some embodiments, the first preset direction and the second preset direction are different, the first connecting part and the second connecting part are connected and form a triangular cavity that is spaced apart from the continuous trapezoidal cavity array, and the interface is located at the second connecting part.

[0011] In some embodiments, the inner profile further has a straight structure, and the outer profile further has a bent structure. The bent structure and the straight structure are connected to form a triangular cavity spaced apart from the continuous trapezoidal cavity array. The bent structure is provided with an interface for bolt installation.

[0012] In some embodiments, a filling layer is provided in the continuous trapezoidal cavity array.

[0013] In some embodiments, the outer surface of the main body is provided with an inspection door mounting hole, a ventilation device mounting hole, and a display window mounting hole, and the edges of the inspection door mounting hole, the ventilation device mounting hole, and the display window mounting hole are all fitted with metal edging rings by a hot pressing process.

[0014] This application also provides a vehicle equipment compartment, including the skirt of any of the above.

[0015] This application also provides a rail vehicle including the vehicle equipment compartment of any of the above.

[0016] Compared to the aforementioned background technology, the skirt panel provided in this application embodiment includes a body composed of double-layer profiles, with internal ribs inside the body forming a continuous trapezoidal cavity array distributed along the length direction of the body. The beneficial effects of this skirt panel configuration mainly include:

[0017] The double-layer profile, with its internal ribs forming a multi-cavity structure, not only achieves lightweighting but also enhances the stability of the skirt structure. This is primarily due to: First, the continuous cavity array divides the overall structure into multiple independent small chambers, forming a "grid truss"-like mechanical system through the internal ribs. This effectively disperses stress generated by external loads. Simultaneously, the cavity array optimizes the cross-sectional moment of inertia of the skirt structure and progressively dissipates impact energy, thereby improving overall deformation resistance. Furthermore, the layered interfaces formed by the continuous cavities hinder crack propagation, deflecting crack paths and effectively extending structural lifespan. Second, the continuous trapezoidal cavity array is composed of a continuous combination of trapezoidal cavities. The trapezoidal cavity structure optimizes stress distribution through geometric symmetry, achieving uniform stress distribution, reducing stress concentration, and avoiding fatigue damage caused by localized stress concentration. The streamlined contours of the trapezoidal cavities also optimize airflow distribution in the skirt, reducing air resistance and minimizing eddy current generation. Third, each cavity in the continuous trapezoidal cavity array can serve as a carrier for filling materials or an integrated sensor, achieving structural-functional integration and improving overall stability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the first type of skirt in this application;

[0020] Figure 2 This is a structural schematic diagram of the second type of skirt panel in this application;

[0021] Figure 3 This is a structural schematic diagram of the third type of skirt panel in this application;

[0022] Figure 4 This is a structural schematic diagram of the fourth type of skirt panel in this application.

[0023] in:

[0024] 10-Ontology;

[0025] 11-Inner layer profile, 111-First overlap, 112-First connection, 113-Straight structure;

[0026] 12-Outer profile, 121-Second overlap, 122-Second connection, 123-Bending structure;

[0027] 20-Inner tendons;

[0028] 30-Continuous Trapezoidal Cavity Array;

[0029] 40- Triangular cavity. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The skirt provided in this application embodiment includes a body 10 made of double-layer profiles. The body 10 has an inner rib 20 inside, and the inner rib 20 and the body 10 form a continuous trapezoidal cavity array 30 distributed along the length direction of the body 10.

[0033] The so-called continuous trapezoidal cavity array 30 refers to an array structure composed of at least two trapezoidal cavities arranged in a continuous manner.

[0034] The double-layer profile forms a multi-cavity structure through internal ribs 20, which not only achieves lightweighting but also makes the skirt structure more stable, mainly in the following ways:

[0035] Firstly, the continuous cavity array divides the overall structure into multiple independent small cavities, forming a mechanical system similar to a "grid truss" through the internal ribs 20. This effectively disperses the stress generated by external loads. At the same time, the cavity array can optimize the cross-sectional moment of inertia of the skirt structure and gradually dissipate the impact energy received by the skirt structure, thereby improving the overall deformation resistance. In addition, the layered interface formed by the continuous cavity can hinder crack penetration, deflect the crack propagation path, and effectively extend the structural life.

[0036] Secondly, the continuous trapezoidal cavity array 30 is composed of a continuous combination of trapezoidal cavities. The trapezoidal cavity structure optimizes the stress distribution through geometric symmetry to achieve uniform stress distribution in the body 10, reduce stress concentration, and avoid fatigue damage caused by local stress concentration. At the same time, the streamlined contour of the trapezoidal cavity can optimize the airflow distribution of the skirt, reduce air resistance, and reduce vortex generation.

[0037] Third, each cavity in the continuous trapezoidal cavity array 30 can serve as a carrier for filling material or an integrated sensor, achieving structural-functional integration and improving overall stability.

[0038] Specifically, the body 10 includes an inner profile 11 (also called inner skin) and an outer profile 12 (also called outer skin). The first end (lower end) of the inner profile 11 has a first overlap 111, and the first end (lower end) of the outer profile 12 has a second overlap 121. The first overlap 111 and the second overlap 121 both extend in a direction away from the continuous trapezoidal cavity array 30. The first overlap 111 and the second overlap 121 overlap and form a first plate that protrudes a certain length from the continuous trapezoidal cavity array 30.

[0039] In this way, a plate structure is formed at the first end (lower end) of the body 10, so that the composite fiber cloth of the inner and outer skin can be overlapped, avoiding the situation of fiber cloth butt joint at the bottom of the skirt board and reducing the risk of crack formation.

[0040] In other words, compared to the case where the composite fiber cloth of the inner and outer skins is joined at the bottom of the skirt, the composite fiber cloth of the inner and outer skins is overlapped at the bottom of the skirt, so that the composite fiber cloth of the inner and outer skins has a certain overlap length at the bottom of the skirt and completes the joint. This can avoid the risk of cracks during vehicle operation caused by the gap formed by the joint.

[0041] Please refer to the following: Figure 1 , Figure 2 and Figure 3 The second end (upper end) of the inner profile 11 also has a first connecting part 112, which extends along a first preset direction. The second end (upper end) of the outer profile 12 also has a second connecting part 122, which extends along a second preset direction. The first connecting part 112 and the second connecting part 122 are connected and form an interface for bolt installation.

[0042] like Figure 1 and Figure 2 As shown, the skirt panel has an overall L-shaped structure, and its main structure is equipped with a continuous trapezoidal cavity array 30.

[0043] Specifically, the first preset direction and the second preset direction are the same, the first connecting part 112 and the second connecting part 122 are connected and form a second plate of a certain length of protruding continuous trapezoidal cavity array 30, the interface is provided on the second plate, and the angle between the second plate and the length direction of the body 10 is less than 90 degrees.

[0044] In this way, a single-layer flange plate (second plate) can be set on the top of the skirt plate as a bolt installation interface. The thickness of the second plate can be 4mm, and the 4mm plate thickness is to increase the strength of the second plate.

[0045] Furthermore, the structure where the second plate and the continuous trapezoidal cavity array 30 are located adopts a rounded transition, which is consistent with... Figure 1Compared to the structure shown, Figure 2 The curved transition section of the structure shown is reinforced, or the rounded corners of the curved transition section are designed to be larger, so that the connection strength between the second plate and the structure where the continuous trapezoidal cavity array 30 is located is better, which is conducive to improving the stability of the overall structure of the skirt plate.

[0046] It should be noted that, Figure 1 and Figure 2 In the structure shown, the continuous trapezoidal cavity array 30 of the skirt body has at least three continuously arranged trapezoidal cavities to ensure that the skirt as a whole has sufficient stability.

[0047] Please refer to the following: Figure 3 The first preset direction and the second preset direction are different. That is to say, the extension directions of the first connecting part 112 and the second connecting part 122 are not the same. The first connecting part 112 and the second connecting part 122 are connected and form a triangular cavity 40 that is spaced apart from the continuous trapezoidal cavity array 30. The interface is located at the second connecting part 122.

[0048] For example, the extending direction of the second connecting part 122 is along such Figure 3 As shown in the horizontal direction, the first connecting portion 112 extends at a predetermined angle to the horizontal direction, such that the first connecting portion 112 extends to the end of the second connecting portion 122 and connects with the end of the second connecting portion 122 to form a triangular cavity 40 spaced apart from the continuous trapezoidal cavity array 30. The triangular cavity 40 and the continuous trapezoidal cavity array 30 can be spaced apart by inner ribs 20, outer profiles 12 or inner profiles 11.

[0049] In this way, a support connection structure with a triangular cavity 40 can be formed at the top of the skirt. Compared with a separate flange plate structure, the support connection structure with a triangular cavity 40 has better stability and ensures the strength and stability of the connection structure between the skirt and the lower side beam of the vehicle body.

[0050] Please refer to the following: Figure 4 The second end (upper end) of the inner profile 11 also has a straight structure 113, and the second end (upper end) of the outer profile 12 also has a bent structure 123 (L-shaped or V-shaped bend). The bent structure 123 and the straight structure 113 are connected and form a triangular cavity 40 that is spaced apart from the continuous trapezoidal cavity array 30. The bent structure 123 is provided with an interface for bolt installation.

[0051] In this way, a support connection structure with a triangular cavity 40 can be formed at the top of the skirt. Compared with a separate flange plate structure, the support connection structure with a triangular cavity 40 has better stability and ensures the strength and stability of the connection structure between the skirt and the lower side beam of the vehicle body.

[0052] It is important to note that Figure 3 In the structure shown, the continuous trapezoidal cavity array 30 of the main body of the skirt panel has three trapezoidal cavities, while the triangular cavity 40 is arranged on one side of the top trapezoidal cavity. Figure 4 In the structure shown, the continuous trapezoidal cavity array 30 of the main body of the skirt panel has two trapezoidal cavities, while the triangular cavity 40 is arranged above the top trapezoidal cavity. In other words, Figure 3 The structure shown can be regarded as Figure 4 The structure shown is formed by adding supporting ribs inside the triangular cavity 40.

[0053] In some embodiments, both the continuous trapezoidal cavity array 30 and the triangular cavity 40 may be provided with a filling layer. The filling layer may be a sound-insulating or heat-insulating material.

[0054] In some embodiments, the outer surface of the body 10 is provided with an inspection door mounting hole, a ventilation device mounting hole, and a display window mounting hole. For example, the display window is used to observe the equipment compartment. The edges of the inspection door mounting hole, the ventilation device mounting hole, and the display window mounting hole are all fitted with metal edging rings by a hot pressing process.

[0055] As can be seen, the mounting holes provide clear installation positions for components such as inspection doors, ventilation devices, and display windows, facilitating quick and accurate installation by installers and improving installation efficiency. At the same time, the embedded metal edging ring provides additional structural support for the mounting holes, increasing the strength of the mounting hole edges and making the connection between the installed components and the skirt panel more secure. In this way, when the equipment compartment skirt panel is subjected to external forces such as vibration and impact, the metal edging ring can effectively prevent deformation and damage to the edges of the mounting holes, ensuring that the connection between the components and the skirt panel is always reliable.

[0056] In some embodiments, the skirt is an integral structure formed by pultrusion molding of carbon fiber composite material.

[0057] In some embodiments, the thickness of both the inner and outer skins can be set to 2.3 mm, and the thickness of the inner rib 20 can be set to 2 mm to avoid excessive redundancy. The inner rib 20 and the inner and outer skins form at least two trapezoidal cavities. This design combines structural stability with the pultrusion molding processability of composite materials. The height of the skirt panel body can be set to 30 mm. In addition, rounded corners are provided inside the cavities, also to improve the pultrusion molding processability and molding quality. The ends of both the first and second plates are rounded rather than right-angled, which can also prevent edge delamination after molding.

[0058] By adopting the above-mentioned configuration, the pultrusion molding process of the skirt board can be improved, and the composite fiber cloth can avoid small chamfers, sharp angles, and changes in the small area ratio as much as possible, so as to avoid problems such as fiber buckling and wrinkling, which would affect the molding quality.

[0059] The vehicle equipment compartment provided in this application includes the skirt described in the above specific embodiments.

[0060] The rail vehicle provided in this application includes the vehicle equipment compartment described in the above specific embodiments.

[0061] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0062] The skirt, vehicle equipment compartment, and rail vehicle provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A skirt board, characterized in that, It includes a body made of double-layer profiles, the interior of which is provided with internal ribs, and the internal ribs and the body form a continuous trapezoidal cavity array distributed along the length direction of the body; The body includes an inner profile and an outer profile. The inner profile has a first overlap and the outer profile has a second overlap. Both the first overlap and the second overlap extend away from the continuous trapezoidal cavity array. The first overlap and the second overlap overlap join together to form a first plate that protrudes from the continuous trapezoidal cavity array by a certain length. The inner profile further has a first connecting portion extending along a first preset direction, and the outer profile further has a second connecting portion extending along a second preset direction. The first connecting portion and the second connecting portion are joined together to form an interface for bolt installation. Alternatively, the inner profile further has a straight structure, and the outer profile further has a bent structure. The bent structure and the straight structure are joined together to form a triangular cavity spaced apart from the continuous trapezoidal cavity array. The bent structure is provided with an interface for bolt installation. The skirt panel is an integral structure formed by pultrusion molding of carbon fiber composite material.

2. The skirt board as described in claim 1, characterized in that, The first preset direction and the second preset direction are the same. The first connecting part and the second connecting part are connected and form a second plate that protrudes a certain length from the continuous trapezoidal cavity array. The interface is provided on the second plate, and the angle between the second plate and the length direction of the body is less than 90 degrees.

3. The skirt board as described in claim 1, characterized in that, The first preset direction and the second preset direction are different. The first connecting part and the second connecting part are connected and form a triangular cavity that is spaced apart from the continuous trapezoidal cavity array. The interface is located in the second connecting part.

4. The skirt board as described in any one of claims 1-3, characterized in that, The continuous trapezoidal cavity array is provided with a filling layer.

5. The skirt board as described in any one of claims 1-3, characterized in that, The outer surface of the main body is provided with an inspection door mounting hole, a ventilation device mounting hole and a display window mounting hole, and the edges of the inspection door mounting hole, the ventilation device mounting hole and the display window mounting hole are all fitted with metal edging rings by hot pressing process.

6. A vehicle equipment compartment, characterized in that, Includes the skirting board as described in any one of claims 1-5.

7. A rail vehicle, characterized in that, Includes the vehicle equipment compartment as described in claim 6.

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