Carbon fiber integrally-formed light-weight apron board for high-speed motor car

Abstract

The invention provides a carbon fiber integrally-formed light-weight apron board for a high-speed train. The carbon fiber integrally-formed light-weight apron board for the high-speed motor car comprises an equipment compartment apron board and an air outlet grid arranged on the equipment compartment apron board, the equipment compartment apron board comprises an apron board body, an upper edge and a rotating shaft, the upper edge and the rotating shaft are arranged at the two ends of the apron board body, and the apron board body comprises an inner core and a skin arranged on the surface of the inner core. The upper edge and the rotating shaft are of solid structures made of the same material as the skin, an opening is formed in the apron board body, the air outlet grid is arranged along the opening, and the air outlet grid comprises a grid upper frame, a grid lower frame, a grid supporting frame and a grid inner frame which are sequentially connected. According to the carbon fiber integrally-formed light-weight apron board for the high-speed motor car, the problem that an existing equipment compartment apron board is large in weight is solved.

Description

Technical Field

[0001] The present invention relates to the field of rail vehicles, and particularly to a lightweight carbon fiber integrally formed skirt board for high-speed EMUs. Background Art

[0002] For the next generation of high-speed EMUs, due to the increase in speed grade, in order to reduce the increased energy consumption brought by speed increase, higher requirements are put forward for the lightweight of the whole vehicle weight. At present, the skirt boards of the equipment cabins of high-speed EMUs are mostly made of welded aluminum profiles, which are heavy and have large welding deformation, and no longer meet the weight requirements of speed increase and energy consumption reduction of EMUs. For this reason, quite a lot of existing skirt board products use carbon fiber materials to reduce weight, but there are still a large number of parts made of metal materials in such products, and the complete carbon fiberization of the products cannot be achieved.

[0003] For example, in the solution disclosed in the invention with the application number "202011030553.3", the name "Skirt Board, Carriage and Rail Vehicle", and the applicant "CRRC Tangshan Co., Ltd.", the rotating shaft is still made of metal material, and the air outlet grille is still made of metal. It cannot meet the current weight requirements of speed increase and energy consumption reduction of EMUs. Summary of the Invention

[0004] In order to solve the problem of the large weight of the existing equipment cabin skirt board, the present invention provides a lightweight carbon fiber integrally formed skirt board for high-speed EMUs to solve the above problems.

[0005] A lightweight carbon fiber integrally formed skirt board for high-speed EMUs includes an equipment cabin skirt board and an air outlet grille provided on the equipment cabin skirt board. The equipment cabin skirt board includes a skirt board main body and upper edges and rotating shafts provided at both ends thereof. The skirt board main body includes an inner core and a skin provided on its surface. The upper edges and the rotating shafts are solid structures made of the same material as the skin. The skirt board main body has an opening, and the air outlet grille is provided along the opening. The air outlet grille includes a grille upper frame, a grille lower frame, a grille support frame and a grille inner frame connected in sequence.

[0006] In a preferred embodiment of the lightweight carbon fiber integrally formed skirt board for high-speed EMUs provided by the present invention, an air knife is provided at a position on the outer side of the skirt board main body close to the rotating shaft. The air knife includes an inner core and a skin provided on its surface.

[0007] In a preferred embodiment of the lightweight carbon fiber integrally formed skirt board for high-speed EMUs provided by the present invention, the upper edges, the skin and the rotating shafts are processed into one body from carbon fiber materials, and the skin on the outer side of the skirt board main body is thicker than that on the inner side.

[0008] In a preferred embodiment of the lightweight skirt panel integrally formed with carbon fiber for high-speed trains provided by the present invention, the rotating shaft includes a water-drop-shaped embedded part, and a carbon fiber material disposed outside thereof and integrally processed with the skin. The embedded part includes a shaft tube and an insert block, and the insert block is laid on the side wall of the shaft tube, and the two are assembled into the water-drop-shaped embedded part.

[0009] In a preferred embodiment of the lightweight skirt panel integrally formed with carbon fiber for high-speed trains provided by the present invention, on the inner side of the equipment cabin skirt panel, a sealing profile is provided along the edge; a sealing rubber strip is provided along the sealing profile. The sealing rubber strip includes a straight rubber strip disposed in the sealing profile and a corner rubber strip disposed between adjacent sealing profiles.

[0010] In a preferred embodiment of the lightweight skirt panel integrally formed with carbon fiber for high-speed trains provided by the present invention, the sealing profile includes an integral fixing part and a connecting part. The fixing part is used for fixing to the skirt panel main body, the upper edge or the rotating shaft, and the connecting part is a dovetail groove structure for connecting with the sealing rubber strip.

[0011] The straight rubber strip includes an integral installation part and a sealing part. The shape of the installation part is adapted to and connected with the inner shape of the clamping groove of the connecting part. The sealing part is a hollow semi-circular structure and is an overall linear structure; the cross-sectional shape of the corner rubber strip is the same as the cross-sectional shape of the straight rubber strip and is an overall broken-line structure.

[0012] In a preferred embodiment of the lightweight skirt panel integrally formed with carbon fiber for high-speed trains provided by the present invention, the upper grille frame, the lower grille frame, the grille support frame and the grille inner frame are all separately processed from carbon fiber materials and assembled into the air outlet grille.

[0013] Compared with the prior art, the lightweight skirt panel integrally formed with carbon fiber for high-speed trains provided by the present invention has the following beneficial effects: 1. In the solution provided by the present invention, the equipment cabin skirt panel integrally formed with carbon fiber and the air outlet grille made of carbon fiber are adopted, which greatly reduces the weight of the original aluminum alloy equipment cabin skirt panel, thereby reducing the weight of the whole vehicle and enabling the EMU to effectively reduce energy consumption.

[0014] 2. In the solution provided by the present invention, a wind knife for wind breaking is designed on the outer side of the equipment cabin skirt panel, which effectively reduces wind resistance during the high-speed operation of the EMU, thereby reducing energy consumption.

[0015] 3. In the solution provided by the present invention, the integral forming lay-up and process scheme of the carbon fiber rotating shaft and the skirt panel body are adopted, which effectively solves the problem that the strength at the rotating shaft is insufficient, and it is easy to produce air pockets and poor lay-up during production, resulting in a decline in the performance of the rotating shaft and thus unqualified products. It truly realizes the full composite materialization of the skirt panel and meets the requirements of impact vibration and fatigue static load.

[0016] 4. In the solution provided by the present invention, the sealing profile and the sealing strip are connected by a dovetail groove structure, which makes the installation of the strip easier and the disassembly and assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural view of a lightweight skirt panel integrally formed with carbon fiber for high-speed EMUs; Figure 2 is an exploded view of the air outlet grille; Figure 3 is a cross-sectional view of the equipment compartment skirt panel; Figure 4 is Figure 3 a partial enlarged view of Figure 5 is a cross-sectional view of the sealing profile; Figure 6 is a schematic structural view of the sealing strip.

[0018] Reference numerals in the figures: equipment compartment skirt panel 1, skirt panel main body 11, main body core material 111, main body skin 112, upper edge 12, rotating shaft 13, air knife 14, air knife core material 141, air knife skin 142, embedded part 15, shaft tube 151, insert block 152, air outlet grille 2, grille upper frame 21, grille lower frame 22, grille support frame 23, grille inner frame 24, sealing profile 3, fixing part 31, connecting part 32, sealing strip 4, installation part 41, sealing part 42, touch lock 5, tongue lock 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Please refer to Figures 1 to 4 simultaneously, which are respectively a schematic structural view of a lightweight skirt panel integrally formed with carbon fiber for high-speed EMUs provided by the present invention, an exploded view of the air outlet grille and a cross-sectional view of the skirt panel main body, as well as a cross-sectional view of the skirt panel main body at the rotating shaft position.

[0021] The lightweight skirt panel integrally formed with carbon fiber for high-speed EMUs includes an equipment compartment skirt panel 1, an air outlet grille 2, a sealing profile 3, and a sealing strip 4.

[0022] The equipment compartment skirt panel 1 includes a skirt panel main body 11, an upper edge 12, a rotating shaft 13, and an air knife 14.

[0023] The skirt panel main body 11 includes a core material made of aramid honeycomb and a skin made of carbon fiber laid on the surface of the core material, which are respectively denoted as the main body core material 111 and the main body skin 112.

[0024] The main body core material 111 is provided with an opening at the central position. The opening is used to set the air outlet grille 2, and the skin is also laid on the inner wall of the opening. Since the exposed surface has a harsher use environment than the inner surface of the cabin, the thickness of the main body skin 112 on the outer side of the skirt main body 11 is greater than that on the inner side.

[0025] The top of the skirt main body 11 is provided with an upper edge 12. The upper edge 12 is a solid carbon fiber structure and forms an integral structure with the main body skin 112. Specifically, the upper edge 12 adopts a concave design, forming a smooth waistline with the vehicle body, which is more beautiful after installation.

[0026] Six rotating shafts 13 are provided at the bottom of the skirt main body 11, and embedded parts 15 are provided in the rotating shafts 13. The embedded part 15 includes a shaft tube 151 and an insert block 152. The shaft tube 151 is a carbon fiber tube, and the insert block 152 is a strip-shaped structure with a cross-section generally in a triangular shape, which is formed by machining a carbon fiber block. The insert block 152 is arranged on its side wall at an angle parallel to the shaft tube 151, and the two are connected by a film between them, thus splicing to form an embedded part 15 with a cross-section in a water droplet shape. The surface of the embedded part 15 is further laid with carbon fiber prepreg, forming an integral solid carbon fiber structure with the skin of the skirt main body 11.

[0027] By setting the embedded part 15, the carbon fiber prepreg can have a smooth transition during laying. And by designing it into a water droplet shape, the position where the embedded block 14 is located will not have defects such as holes and air pockets due to difficult laying of the prepreg, resulting in a weakening of the performance of the rotating shaft 13.

[0028] The equipment cabin skirt 1 is integrally molded by a carbon fiber sandwich structure. This process can well control the structural dimensions of the skirt and ensure that the entire outer surface is smooth and beautiful.

[0029] An air knife 14 is installed at the lower position on the outer side of the skirt main body 11, which can effectively reduce the air resistance when the high-speed train runs at high speed. The inside of the air knife 14 is a PMI foam formed by machining, and the outer surface is a carbon fiber skin, which are respectively recorded as the air knife core material 141 and the air knife skin 142.

[0030] The air outlet grille 2 includes a grille upper frame 21, a grille lower frame 22, a grille support frame 23 and a grille inner frame 24. All four modules are molded by carbon fiber prepreg, and finally the 4 modules are bonded into a whole to form a complete air outlet grille 2. The air outlet grille 2 is installed at the opening position of the skirt main body 11 through a mixed connection method of bonding and riveting.

[0031] Please refer to Figure 5 , which is a cross-sectional view of the sealing profile in the carbon fiber integrally formed lightweight skirt for high-speed trains provided by the present invention.

[0032] On the inner side of the equipment cabin skirt plate 1, there is a circle of four sealing profiles 3 along the edge. The sealing profiles 3 include two configurations. Three of them are arranged at the upper end and the left and right sides of the equipment cabin skirt plate 1 and are Figure 5 configured as shown in -a, and one arranged at the lower end of the equipment cabin skirt plate 1 is Figure 5 configured as shown in -b.

[0033] The first configuration includes a flat plate and a dovetail groove arranged on one side of it, which are respectively a fixing part 31 for fixing to the equipment cabin skirt plate 1 and a connecting part 32 for connecting the sealing strip 6. The fixing part 31 is installed on the edge of the skirt plate main body 11 in a mixed connection mode of adhesion and riveting, and the side with the connecting part 32 is close to the edge of the skirt plate main body 11, and the other side is inward.

[0034] The sealing profile 3 is not only used for installing the sealing strip 4 but also plays a role in strengthening the equipment cabin skirt plate 1.

[0035] The second configuration includes a base and a dovetail groove arranged on its top, which are respectively a fixing part 31 for fixing to the equipment cabin skirt plate 1 and a connecting part 32 for connecting the sealing strip 6.

[0036] The fixing part 31 is installed in the depression between the rotating shaft 13 and the skirt plate main body 11 in an adhesive connection mode.

[0037] Please refer to Figure 6 , which is a schematic structural diagram of the sealing strip in the carbon fiber integrally formed lightweight skirt plate for high-speed trains provided by the present invention.

[0038] There is a circle of sealing strip 4 along the sealing profile 3. The sealing strip 4 includes two configurations, a straight strip arranged inside the sealing profile 3 and a corner strip arranged between adjacent sealing profiles 3. The cross-sections of both are Figure 6 shown as -a, and the structure of the corner strip is as Figure 6 shown as -b.

[0039] The sealing strip 4 includes an installation part 41 for connecting with the connecting part and a sealing part 42 for providing sealing ability. The installation part 41 is a dovetail groove structure with the same shape as the connecting part 32. This dovetail groove combination of the sealing profile 3 and the sealing strip 4 makes the replacement of the strip more convenient. The sealing part 42 is a hollow semi-circle and realizes the sealing function by its own elasticity.

[0040] Through the transition connection of the corner strip, a complete sealing interval is formed around the equipment cabin skirt plate 1.

[0041] In addition, a catch 5 and multiple tongue locks 6 are arranged on the inner side of the skirt plate main body 11 near the upper edge 12.

[0042] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. A carbon fiber one-piece lightweight skirt for a high-speed motor vehicle, comprising an equipment compartment skirt and an air outlet grille provided on the equipment compartment skirt, characterized in that: The equipment cabin skirt includes a skirt body and upper edges and a rotating shaft arranged at both ends thereof, the skirt body includes an inner core and a skin arranged on its surface, the upper edge and the rotating shaft are solid structures made of the same material as the skin, the skirt body is opened, and the air outlet grille is arranged along the opening, and the air outlet grille includes a grille upper frame, a grille lower frame, a grille support frame and a grille inner frame connected in sequence.

2. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicle according to claim 1, characterized in that: A wind knife is arranged on the outer side of the skirt plate body near the rotating shaft, and the wind knife comprises an inner core and a skin arranged on the surface thereof.

3. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicles according to claim 1 or 2, characterized in that: The upper edge, the skin and the rotating shaft are processed into one piece from carbon fiber material, and the thickness of the skin on the outer side of the skirt body is greater than that on the inner side.

4. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicle according to claim 3, characterized in that: The rotating shaft comprises a teardrop-shaped embedded part and a carbon fiber material arranged on the outside of the rotating shaft and processed into one piece with the skin.

5. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicle according to claim 4, characterized in that: The embedded part comprises an axle tube and an insert, wherein the insert is laid on the side wall of the axle tube, and the two are assembled to form the embedded part in a water drop shape.

6. The carbon fiber one-piece lightweight skirt for high-speed motor vehicles according to any one of claims 1 to 5, characterized in that: A circle of sealing profile is arranged along the edge of the inner side surface of the equipment cabin skirt plate; and a sealing strip is arranged along the sealing profile.

7. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicle according to claim 6, characterized in that: The sealing strips include straight strips arranged in the sealing profiles, and angle strips arranged between adjacent sealing profiles.

8. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicles according to claim 7, characterized in that: The sealing profile comprises an integrated fixing portion and a connecting portion, wherein the fixing portion is used to be fixed to the skirt plate body, the upper edge or the rotating shaft, and the connecting portion is a dovetail groove structure, which is used to connect with the sealing strip.

9. The carbon fiber integrally formed lightweight skirt for high-speed motor vehicle according to claim 8, characterized in that: The straight rubber strip includes an integrated mounting portion and a sealing portion. The shape of the mounting portion is adapted to the shape of the inner side of the slot of the connecting portion and is connected therewith. The sealing portion is a hollow semicircular structure, and the overall structure is a straight line structure. The cross-sectional shape of the angle rubber strip is consistent with the cross-sectional shape of the straight rubber strip, and the overall structure is a broken line structure.

10. The carbon fiber one-piece lightweight skirt for high-speed motor vehicles according to any one of claims 1 to 5, characterized in that: The grille upper frame, the grille lower frame, the grille support frame and the grille inner frame are all individually processed from carbon fiber materials and assembled into the air outlet grille.

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