A frame of a bogie, a rail vehicle, and a processing method of the bogie frame

Abstract

The present application provides a bogie frame, a rail vehicle, and a processing method for the bogie frame, including a frame body and an upper frame cover plate. The upper frame cover plate is made of a fiber composite material. The frame body includes a core mold and a fiber composite material covering the outer surface of the core mold. The frame body includes two side beam bodies and a cross beam body connecting the two side beam bodies. The upper frame cover plate includes two side beam cover plates and a cross beam cover plate connecting the two side beam cover plates. The upper frame cover plate is disposed on the frame body. The frame further includes a first annular coating layer and a second annular coating layer, both of which are made of fiber composite materials. The first coating layer surrounds the cross beam cover plate and the cross beam body longitudinally. The second coating layer surrounds the first coating layer, the side beam cover plates, and the side beam bodies transversely. The second coating layer covers the first coating layer, the side beam cover plates, and the side beam bodies. This frame can reduce or eliminate mechanical connection structures, thereby reducing weight and design difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of railway vehicles, and particularly relates to a bogie frame, a railway vehicle, and a processing method for the bogie frame. Background Art

[0002] The bogie frame has an H-shaped frame structure, that is, the frame includes two side beams and a cross beam connected between the two side beams. At present, the material of the frame can be carbon fiber, and the structural form of the carbon fiber frame still uses the conventional split manufacturing of the cross beam and the side beam, and then mechanical methods such as bolts and rivets are used for assembly connection.

[0003] This setting method not only increases the weight of the frame, but also needs to fully consider the body characteristics of the carbon fiber material and the strength of the connection area in terms of the frame structure design and the connection structure design, etc., and the design difficulty is relatively large. Summary of the Invention

[0004] The purpose of the present application is to provide a bogie frame, a railway vehicle, and a processing method for the bogie frame. The frame can reduce or eliminate the mechanical connection structure, thereby reducing the weight and the design difficulty.

[0005] The present application provides a bogie frame, including a frame main body and a frame upper cover plate. The frame upper cover plate is made of fiber composite material. The frame main body includes a core mold and fiber composite material covering the outer surface of the core mold. The frame main body includes two side beam main bodies and a cross beam main body connecting the two side beam main bodies. The frame upper cover plate includes two side beam cover plates and a cross beam cover plate connecting the two side beam cover plates. The frame upper cover plate is covered on the frame main body, wherein the cross beam cover plate is covered on the cross beam main body, and the two side beam cover plates are respectively covered on the corresponding side beam main bodies.

[0006] The frame further includes an annular first coating layer and an annular second coating layer. Both the first coating layer and the second coating layer are fiber composite materials. The first coating layer longitudinally surrounds the cross beam cover plate and the cross beam main body, and covers at least part of the cross beam cover plate and the cross beam main body. The second coating layer transversely surrounds the first coating layer, the side beam cover plates, and the side beam main bodies. The second coating layer covers the upper surface and the lower surface of the first coating layer, and covers the middle parts of the side beam cover plates and the side beam main bodies.

[0007] In a specific embodiment, the side beam cover plate includes a side beam middle cover plate and a side beam end cover plate. The side beam middle cover plate is covered and attached to the upper surface of the side beam main body. There is a gap between the side beam end cover plate and the upper surface of the side beam main body to form an opening, and the opening is a primary spring mounting interface.

[0008] In a specific embodiment, a central traction installation interface penetrating up and down is provided in the middle of the frame, a first through hole penetrating up and down is provided in the middle of the crossbeam main body, a second through hole penetrating up and down is provided in the crossbeam cover plate, and a third through hole penetrating through the first coating layer and the second coating layer is further included. The first through hole, the second through hole, and the third through hole are stacked up and down to form the central traction installation interface.

[0009] In a specific embodiment, the crossbeam main body includes a middle section of the crossbeam main body and two end sections of the crossbeam main body located at the transverse two ends of the middle section of the crossbeam main body. The longitudinal dimension of the middle section of the crossbeam main body is greater than the longitudinal dimension of the end section of the crossbeam main body; the frame upper cover plate includes a middle section of the crossbeam cover plate and two end sections of the crossbeam cover plate located at both ends of the middle section of the crossbeam cover plate. The longitudinal dimension of the middle section of the crossbeam cover plate is greater than the longitudinal dimension of the end section of the crossbeam cover plate;

[0010] The second coating layer, the frame main body, and the frame upper cover plate enclose to form an installation cavity, and the installation cavity is an installation interface for the brake suspension of the bogie.

[0011] In a specific embodiment, the frame is processed with a secondary spring installation interface for the secondary spring of the bogie, and / or an oil tank installation interface for the oil tank of the bogie.

[0012] In a specific embodiment, the frame main body is of an integral structure; or, the frame main body includes a first frame split part and a second frame split part that are longitudinally distributed and symmetric, and the first frame split part and the second frame split part are longitudinally butted to form the frame main body.

[0013] In a specific embodiment, the frame upper cover plate and the frame main body are adhesively bonded or cured and connected.

[0014] This application further provides a rail vehicle, including a bogie, and the bogie includes a frame, and the frame is the frame of the bogie described in any one of the above.

[0015] This application further provides a processing method for the frame of a bogie, which is used to process the frame of the bogie described in any one of the above, and includes the following steps:

[0016] Prepare the frame upper cover plate and the frame main body;

[0017] Place the frame upper cover plate on the frame main body, and wind the fiber composite material longitudinally around the crossbeam cover plate of the frame upper cover plate and the crossbeam main body of the frame main body, and cover at least one section in the transverse direction of the crossbeam cover plate and the crossbeam main body to form the first coating layer;

[0018] Then, the fiber composite material is wound around the middle parts of the frame body and the upper cover plate of the frame along the transverse direction to cover the upper and lower surfaces of the first coating layer and the middle parts of the side beam cover plate and the side beam body.

[0019] In a specific embodiment, the winding manner of the fiber composite material is: winding the fiber composite material or winding the three-dimensional braided preform of the fiber composite material and stitching the two ends.

[0020] In the solution of this application, the frame is formed by multiple layers of structures and is connected together by fiber composite materials layer by layer to form an integral frame structure, meeting the strength requirements of the frame. And during the connection process, no mechanical connection structure is required, and no metal components are needed or a small amount of metal components can be provided. Each part of the frame can be made of relatively light materials, so as to give full play to the advantages of the fiber composite material forming, making the finally formed frame have the advantages of reliable structure and light weight, and also reducing the design difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a frame of a bogie in this embodiment;

[0022] Figure 2 is Figure 1 a schematic structural diagram of the frame body of the frame in

[0023] Figure 3 is Figure 2 a schematic diagram of the first frame split part in the frame body;

[0024] Figure 4 is Figure 1 a schematic structural diagram of the upper cover plate of the frame in

[0025] Figure 5 is Figure 2 a schematic diagram after the frame body in Figure 4 and the upper cover plate of the frame in

[0026] Figure 6 is Figure 5 a schematic structural diagram after the first coating layer is coated on the first frame blank in

[0027] Figure 7 is Figure 6 a schematic structural diagram after the second coating layer is coated on the second frame blank in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to enable those skilled in the art to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the drawings and specific embodiments.

[0029] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of a bogie frame in this embodiment.

[0030] The bogie frame 100D in this embodiment includes two side beams, namely Figure 1 the first side beam 1001 and the second side beam 1002 shown in , the two side beams extend longitudinally, the frame 100D further includes a cross beam 1003 located between the two side beams, the cross beam 1003 extends transversely, and the two transverse ends of the cross beam 1003 are respectively connected to the two side beams, that is, the frame 100D in this embodiment is an H-shaped frame. The frame 100D specifically includes a frame body 1, an upper cover plate 2 of the frame, a first cladding layer 3, and a second cladding layer 4, which will be discussed in detail below.

[0031] As Figure 2 , 3 shown, Figure 2 is Figure 1 a schematic structural diagram of the frame body 1 of the frame 100D in ; Figure 3 is Figure 2 a schematic diagram of the first frame split part 1a in the frame body 1 in .

[0032] The frame body 1 in this embodiment is the main part of the frame 100D, and the frame body 1 is also of H-shaped structure, specifically including two side beam bodies and a cross beam body 13 connecting the two side beam bodies. The two side beam bodies are respectively Figure 2 the first side beam body 11 and the second side beam body 12 shown in , the two side beam bodies extend longitudinally, the cross beam body 13 extends transversely. Obviously, the first side beam body 11 is the main part of the first side beam 1001, the second side beam body 12 is the main part of the second side beam 1002, and the cross beam body 13 is the main part of the cross beam 1003.

[0033] Specifically in this embodiment, the frame body 1 is formed by splicing two frame split parts. Combining Figure 3 for understanding, the two frame split parts are respectively the first frame split part 1a and the second frame split part 1b. The structures of the two frame split parts are the same, and they are arranged symmetrically along the transverse direction in a mirror image. Figure 3 shows the structure of the first frame split part 1a. The first frame split part 1a is generally U-shaped, including two first longitudinal parts 1a1 and 1a2 extending longitudinally. One ends of the two longitudinal parts are connected by a first transverse part 1a3. The second frame split part 1b includes two third longitudinal parts 1b1 and 1b2 extending longitudinally. One ends of the two longitudinal parts of the second frame split part 1b are connected by a second transverse part 1b3. Both frame split parts are U-shaped and are butt-jointed with their openings facing away from each other to form Figure 2The shown H-shaped frame body 1, the first side beam body 11 of the frame body 1 is formed by longitudinally butting the first longitudinal parts 1a1 and the third longitudinal parts 1b1 of two frame split parts, the second side beam body 11 is formed by longitudinally butting the second longitudinal parts 1a2 and the fourth longitudinal parts 1b2 of two frame split parts, and the cross beam body 13 is formed by longitudinally butting the first cross part 1a3 and the second cross part 1b3 of two frame split parts.

[0034] Among them, the first frame split part 1a and the second frame split part 1b can both include their respective corresponding core molds and fiber composite materials coated on the outer surface of the core molds. The fiber composite materials are, for example, carbon fiber composite materials. The core mold is made of a lightweight material such as foam or aluminized foam composite material, etc., which plays the role of a skeleton. The fiber composite material is coated on the outer surface of the core mold by any method such as paving, weaving or winding (including wet winding, dry winding), etc., and then the core mold and the fiber composite material are made into one body by using a heat treatment process such as an autoclave or an RTM curing molding process, so as to process and form the first frame split part 1a and the second frame split part 1b. The RTM process described in this embodiment is a process method in which a designed fiber composite material preform is laid in a mold cavity, and a low-viscosity resin is injected into the mold cavity under the action of pressure or vacuum or both. The resin infiltrates the fiber composite material preform during the process of flowing and filling the mold cavity, and is cured and formed to obtain the required component. The heat treatment processes such as autoclave and RTM are all mature existing processes, and will not be elaborated here.

[0035] When the two frame split parts are spliced to form the frame body 1, they can be glued together. In this way, the splicing is simple and there is no need to use fasteners, which can reduce the mechanical connection structure. As Figure 2 shown, the end faces of the two longitudinal parts and the side faces of the cross part of the first frame split part 1a are bonded to the end faces of the two longitudinal parts and the side faces of the cross part of the second frame split part 1b.

[0036] It can be seen that the frame body 1 can also be an integral structure, that is, the frame body 1 has a core mold, and the core mold itself is H-shaped. After coating with fiber composite materials, an integral H-shaped frame body 1 is formed without splicing. However, according to Figure 2 、 3 the splicing formation method, making a core mold roughly in the shape of a U first and then carrying out paving, weaving or winding of fiber composite materials, etc., can more conveniently process the relatively special-shaped H-shaped frame body 1.

[0037] Looking again at Figure 4 , Figure 4 is Figure 1 the structural schematic diagram of the upper cover plate 2 of the frame 100D in

[0038] The frame 100D in this embodiment further includes an upper frame cover plate 2, which is also H-shaped. The upper frame cover plate 2 includes two side beam cover plates, namely Figure 4 the first side beam cover plate 21 and the second side beam cover plate 22 shown in . The upper frame cover plate 2 further includes a cross beam cover plate 23 connecting the two side beam cover plates. Defining the plane where the longitudinal and transverse directions are located as the reference plane (the reference plane is the horizontal plane during the use of the frame 1), then projecting along the direction perpendicular to the reference plane, that is, projecting along the up and down direction, the projection planes of the upper frame cover plate 2 and the frame main body 1 coincide. The upper frame cover plate 2 is covered on the frame main body 1. Among them, the cross beam cover plate 23 is covered on the cross beam main body 13, the first side beam cover plate 21 is covered on the first side beam main body 11, and the second side beam cover plate 22 is covered on the second cross beam main body 12. That is, the cross beam upper cover plate 2 and the frame main body 1 are stacked up and down along the direction perpendicular to the reference plane and the frame main body 11.

[0039] Please continue to refer to Figure 5 , Figure 5 For Figure 2 the schematic diagram of the superposition of the frame main body 1 and Figure 4 the upper frame cover plate 2 in , at this time, the first frame blank 100A of the frame 1 is formed. The first frame blank 100A is the initial structural form of the frame 1 during the forming process. After the upper frame cover plate 2 and the frame main body 1 are superposed, they can be glued together or connected and fixed by a curing process to form the first frame blank 100A, that is, a mechanical connection structure can still not be adopted.

[0040] Look at Figure 6 again, Figure 6 For Figure 5 the schematic diagram of the structure after the first frame blank 100A in is covered with the first coating layer 3, at this time, the second frame blank 100B of the frame 1 is formed. The second frame blank 100B is an intermediate structural form formed by further processing on the basis of the first frame blank 100A.

[0041] On Figure 5 the basis of the first frame blank 100A, the fiber composite material can be wound longitudinally around the cross beam cover plate 23 and the cross beam main body 13. Winding longitudinally means forming an annular first coating layer 3, and the center line of the annulus extends along the transverse direction. In this way, the cross beam cover plate 23 and the cross beam main body 13 can be covered together by the first coating layer 3 to achieve the purpose of reinforcement. The first coating layer 3 is annular and covers at least part of the cross beam cover plate 13 and the cross beam main body 13. Figure 6 In , the first coating layer 3 is mainly covered in the middle section of the cross beam cover plate 13 and the cross beam main body 13. It can be seen that the first coating layer 4 can also be covered in the whole section along the transverse direction.

[0042] Please continue to view Figure 7 , Figure 7 ForFigure 6 Schematic structural diagram of the second frame blank 100B with the second coating layer 4 wrapped thereon. At this time, the third frame blank 100C of the frame 1 is formed. The third frame blank C is a later structural form formed by further processing on the basis of the second frame blank 100B. At this time, the third frame blank 100C is already close to the final frame product. Figure 7 In [description], the side beam cover plate of the upper cover plate 2 of the frame, the side beam body of the frame main body 1, and part of the second coating layer 4 constitute the corresponding first side beam 1001 or the second side beam 1002, and the cross beam cover plate 23 of the upper cover plate 2 of the frame, the cross beam main body 13 of the frame main body 1, and the first coating layer 13 constitute the cross beam 1003.

[0043] In Figure 6 On the basis of the second frame blank 100B in [description], the fiber composite material can be wound transversely to form the second coating layer 4. When winding transversely, the center line of the annular second coating layer 4 extends longitudinally. In this way, the first coating layer 3, the middle parts of the first side beam cover plate 21, the second side beam cover plate 22, the middle parts of the first side beam main body 11, and the middle parts of the second side beam main body 12 can be wrapped together by the second coating layer 4. Specifically, as Figure 7 shown, the second coating layer 4 will wrap the upper surface and the lower surface of the first coating layer 3, and the upper surfaces of the middle parts of the first side beam cover plate 21 and the second side beam cover plate 22, and can also wrap to the outer surfaces and the lower surfaces of the middle parts of the first side beam main body 11 and the second side beam main body 12. Among them, the opposite side walls of the two side beam main bodies are the inner surfaces, and the opposite side walls are the outer surfaces. In this way, the second coating layer 4 wraps the frame main body 1 and the upper cover plate 2 of the frame together transversely, and it is a secondary wrap on the basis of the first coating layer 3 wrapped longitudinally, that is, it is wrapped both transversely and longitudinally, achieving the effect of secondary reinforcement, and the structural reliability of the finally formed entire frame 1 is relatively strong.

[0044] The aforementioned first cladding layer 3 and second cladding layer 4 can also be formed by processes such as laying, winding, or braiding fiber composite materials into cladding layers. Since the first cladding layer 3 and second cladding layer 4 are to be circumferentially wound to achieve better reinforcement purposes, the winding and braiding methods are more reliable. Among them, when braiding, a three-dimensional braided preform of the fiber composite material can be wound around a predetermined position and the two ends can be sutured. For example, the three-dimensional braided preform can be longitudinally wound around the middle parts of the upper cover plate 2 of the frame and the crossbeam main body 13, and after suturing the two ends, a ring-shaped first cladding layer 3 is formed. Or the three-dimensional braided preform can be transversely wound around the middle part of the second frame blank B, and after suturing the two ends of the three-dimensional braided preform, a ring-shaped second cladding layer 4 is formed. Regardless of whether the laying, winding, or braiding process is used, after the fiber composite material is wound and arranged, the corresponding cladding layer and the corresponding frame blank can be fixed together as a whole through heat treatment processes such as autoclave or RTM curing and forming processes.

[0045] Recheck again Figure 1 , on the third component blank 100C, processing such as mounting seats, interfaces, or holes can continue to be carried out to form the frame 100D of the finished product.

[0046] From the forming process of the above frame 100D, it can be seen that in this embodiment, the frame 100D is formed by a multi-layer structure, and is connected layer by layer by fiber composite materials to form an integral frame structure, meeting the strength requirements of the frame 100D. And during the connection process, no mechanical connection structure is required, no metal components are needed or a small amount of metal components can be provided. Each part of the frame 100D can be made of relatively lightweight materials, and the fiber composite material can account for more than 90% in terms of mass, giving full play to the advantages of fiber composite material forming, so that the finally formed frame 100D has the advantages of reliable structure and light weight, and the design difficulty is also reduced.

[0047] Please combine Figure 1 and Figure 4It is understood that in this embodiment, both side beam covers of the frame upper cover plate 2 include a side beam middle cover plate and two side beam end cover plates located at the longitudinal ends of the side beam middle cover plate. Specifically, the first side beam cover plate 21 includes a first side beam middle cover plate 211 and two first side beam end cover plates 212, and the second side beam cover plate 22 includes a second side beam middle cover plate 221 and two second side beam end cover plates 222. The first side beam cover plate 21 and the second side beam cover plate 22 have the same structure. When the frame upper cover plate 2 is covered on the frame main body 1, the first side beam middle cover plate 211 is covered and attached to the upper surface of the first side beam main body 11, and the second side beam middle cover plate 221 is covered and attached to the upper surface of the second side beam main body 12. However, there is a gap between the two first side beam end cover plates 212 and the upper surface of the first side beam main body 11, and there is a gap between the two second side beam end cover plates 222 and the upper surface of the second side beam main body 12.

[0048] As Figure 4 shown, the first side beam end cover plate 212 includes an inclined plate portion and a horizontal plate portion. The horizontal plate portion is substantially parallel to the first side beam middle cover plate 211. The inclined plate portion serves as a transition area between the horizontal plate portion and the first side beam middle cover plate 211, so that the first side beam end cover plate 212 can have a height difference with the upper surface of the first side beam main body 11, and then a gap is formed. The second side beam end cover plate 222 is arranged in the same way and will not be elaborated here.

[0049] In this way, as Figure 1 shown, openings 100a are formed at the longitudinal ends of the first side beam 1001 and the second side beam 1002 at the position of the gap. The openings 100a serve as a primary spring installation interface, that is, the primary spring of the bogie can be installed in the openings 100a. The primary spring can be a rubber spring or a double spring structure, and both ends of the primary spring can be respectively connected to the side beam end cover plate and the side beam main body. It can be seen that the frame upper cover plate 2 in this embodiment can directly prefabricate the primary spring installation interface by being spaced apart from the end of the frame main body 1. The setting is relatively simple and there is no need to separately process the primary spring installation interface. It can be known that the structural forms of the first side beam cover plate 21 and the second side beam cover plate 22 are not limited to this, and can be expanded and optimized according to the installation requirements of the primary spring. For example, the thickness, width and other dimensions of the side beam end cover plates of the first side beam cover plate 21 and the second side beam cover plate 22 can be adjusted.

[0050] Looking again Figure 2 、 3, a first through hole 13a penetrating up and down is provided in the middle of the crossbeam main body 13 of the frame main body 1. The frame main body 1 is formed by splicing a first frame split part 1a and a second frame split part 1b. At this time, the horizontal part 1a3 of the first frame split part 1a is recessed toward the direction of its U-shaped opening to form a concave part 1aa opposite to the direction of the U-shaped opening. The second frame split part 1b also forms a concave part. When splicing, the two concave parts 1aa are butted to form Figure 2 the first through hole 13a shown. Of course, when the frame main body 1 is of an integral structure, the core mold can directly set out the first through hole, or the first through hole can be machined on the core mold later.

[0051] Look again Figure 4 , the middle of the crossbeam cover plate 23 of the frame upper cover plate 2 also has a second through hole 2a penetrating up and down. After the frame upper cover plate 2 and the frame main body 1 are stacked, the projections of the first through hole 13a and the second through hole 2a in the up and down direction overlap. Comparing Figure 7 and Figure 1 and understanding, after covering the first covering layer 3 and the second covering layer 4, the middle parts of the first covering layer 3 and the second covering layer 4 can be processed to machine out a third through hole penetrating the first covering layer 3 and the second covering layer 4. The third through hole and the projections of the first through hole 13a and the second through hole 2a in the up and down direction overlap. In this way, the first through hole 13a, the second through hole 2a, and the third through hole can be stacked one above the other in the up and down direction to form Figure 1 the through hole 100c penetrating the middle of the crossbeam 1003 of the frame 100D shown. The through hole 100c can be used as a central traction installation interface, that is, for installing the central traction of the bogie. Similarly, the frame 100D of this structural form preforms a central traction installation interface, and the structural form is simple and reliable.

[0052] At the same time, it can be understood that when the frame 1 forms the first through hole 13a in this embodiment, the frame 1 is a relatively complex special-shaped structure formed by butting the concave parts 1aa of the two frame split parts. In this way, when the core mold of the frame split part covers the fiber composite material layer, it is easier to implement.

[0053] Look again Figure 1 , 2 , in this embodiment, the crossbeam main body 13 includes a crossbeam main body middle section 133 and two crossbeam main body end sections located at the transverse two ends of the crossbeam main body middle section 133, namely a first crossbeam main body end section 131 and a second crossbeam main body end section 132. The structures of the two crossbeam main body end sections are the same. The longitudinal dimension of the crossbeam main body middle section 133 is greater than the longitudinal dimension of the crossbeam main body end section, that is, the crossbeam main body 13 has a structure with smaller ends and larger middle in the transverse direction. Combining Figure 3As understood, as mentioned above, in order to form the concave portion 1aa, the middle portions of the transverse portions 1a3 and 1b3 of the two frame split portions are recessed in the opposite directions. In this way, the crossbeam main body 13 formed after docking the two frame split portions automatically forms a structure that is large in the middle and small at both ends. Gaps 1c as shown in Figure 2 will be formed between the two ends of the crossbeam main body 13 and the inner surfaces of the first side beam main body 11 and the second side beam main body 12, and a total of four gaps 1c will be formed.

[0054] The frame upper cover plate 2 is similar in structure to the frame main body 1. The crossbeam cover plate 23 of the frame upper cover plate 2 is also a structure that is large in the middle and small at both ends, namely the middle section 233 of the crossbeam cover plate, the first end section 231 of the crossbeam cover plate, and the second end section 232 of the crossbeam cover plate. Gaps 2b will also be formed, and the positions of the gaps 2b and the gaps 1c correspond, and the projections along the up and down directions overlap.

[0055] At this time, looking at Figure 1 again, after the second coating layer 4 is coated, the second coating layer 4 will cover the upper and lower sides of the gaps 1c and 2b. In this way, the second coating layer 4 and the frame main body 1 and the frame upper cover plate 2 will enclose to form an installation cavity 100b. The installation cavity 100b can be used as an installation interface for the brake suspension of the bogie. For example, the installation cavity 100b can be used to install the mounting seat of the brake hanger in the brake suspension. It can be seen that the frame 100D in this embodiment automatically forms the brake suspension installation interface of the brake suspension after molding, with a clever design and reliable structure.

[0056] Correspondingly, as shown in Figure 6 , since both the crossbeam main body 13 and the crossbeam cover plate 23 are structures that are large in the middle and small at both ends, when the first coating layer 3 is coated, only the part with a large middle size is coated. In this way, it is beneficial for the winding of the fiber composite material or the surrounding of the three-dimensional braided preform. However, it is also possible to coat the fiber composite material at the positions with small sizes at both ends.

[0057] As shown in Figure 1 , in the frame 100D of this embodiment, at the transverse ends of the second coating layer 4, corresponding to the positions of the first side beam 1001 and the second side beam 1002, the secondary spring installation interface of the secondary spring of the bogie can be processed. It is also possible to process the fuel tank installation interface of the fuel tank on both longitudinal sides of the crossbeam 100. Such installation interfaces can be hole positions. It is also easy to ensure the dimensional accuracy when machining the required hole positions and the like after the frame 100D is formed.

[0058] This application also provides a rail vehicle, including a bogie. The bogie includes a frame 100D. The frame 100D is the frame described in any of the above embodiments and has the same technical effects as above, which will not be elaborated here.

[0059] This embodiment further provides a processing method for the frame of a bogie, which is used to process the frame 100D of the bogie in the above embodiment, and includes the following steps:

[0060] Prepare the upper cover plate 2 of the frame and the frame body 1;

[0061] Place the upper cover plate 2 of the frame on the frame body 1, and wind the fiber composite material longitudinally around the crossbeam cover plate 23 of the upper cover plate 2 of the frame and the crossbeam body 13 of the frame body 1, and cover at least one section in the transverse direction of the crossbeam cover plate 23 and the crossbeam body 13 to form a first coating layer 3;

[0062] Then wind the fiber composite material transversely around the middle parts of the frame body 1 and the upper cover plate 2 of the frame to cover the upper surface and the lower surface of the first coating layer 3 and the middle parts of the side beam cover plate and the side beam body to form a second coating layer 4.

[0063] In this article, specific examples are used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A frame of a bogie, characterized in that, It includes a frame body and a frame upper cover plate. The frame upper cover plate is made of fiber composite material. The frame body includes a core mold and fiber composite material covering the outer surface of the core mold. The frame body includes two side beam bodies and a cross beam body connecting the two side beam bodies. The frame upper cover plate includes two side beam cover plates and a cross beam cover plate connecting the two side beam cover plates. The frame upper cover plate is covered on the frame body. Among them, the cross beam cover plate is covered on the cross beam body, and the two side beam cover plates are respectively covered on the corresponding side beam bodies. The frame further includes an annular first coating layer and an annular second coating layer. Both the first coating layer and the second coating layer are fiber composite materials. The first coating layer longitudinally surrounds the cross beam cover plate and the cross beam body and covers at least part of the cross beam cover plate and the cross beam body. The second coating layer transversely surrounds the first coating layer, the side beam cover plates and the side beam bodies. The second coating layer covers the upper surface and the lower surface of the first coating layer and covers the middle parts of the side beam cover plates and the side beam bodies.

2. The frame of the bogie according to claim 1, characterized in that, The side beam cover plate includes a side beam middle cover plate and a side beam end cover plate. The side beam middle cover plate is covered and attached to the upper surface of the side beam body. There is a gap between the side beam end cover plate and the upper surface of the side beam body to form an opening, and the opening is a primary suspension spring installation interface.

3. The frame of the bogie according to claim 1, characterized in that, A central traction installation interface that penetrates up and down is provided in the middle of the frame. The middle of the cross beam body has a first through hole that penetrates up and down. The cross beam cover plate is provided with a second through hole that penetrates up and down. It also includes a third through hole that penetrates the first coating layer and the second coating layer. The first through hole, the second through hole, and the third through hole are stacked up and down to form the central traction installation interface.

4. The frame of the bogie according to claim 1, characterized in that, The cross beam body includes a cross beam body middle section and two cross beam body end sections located at the transverse two ends of the cross beam body middle section. The longitudinal dimension of the cross beam body middle section is greater than the longitudinal dimension of the cross beam body end section. The frame upper cover plate includes a cross beam cover plate middle section and two cross beam cover plate end sections located at both ends of the cross beam cover plate middle section. The longitudinal dimension of the cross beam cover plate middle section is greater than the longitudinal dimension of the cross beam cover plate end section. The second coating layer, the frame body, and the frame upper cover plate enclose to form an installation cavity, and the installation cavity is a brake suspension installation interface for the brake suspension of the bogie.

5. The frame of the bogie according to claim 1, characterized in that, The frame is processed with a secondary suspension spring installation interface for the secondary suspension spring of the bogie, and / or is processed with an oil tank installation interface for the oil tank of the bogie.

6. The frame of the bogie according to any one of claims 1-5, characterized in that, The frame body is an integral structure; or, the frame body includes a first frame split part and a second frame split part that are longitudinally distributed and symmetric. The first frame split part and the second frame split part are longitudinally butted to form the frame body.

7. The frame of the bogie according to any one of claims 1-5, characterized in that, The frame upper cover plate and the frame body are adhesively bonded or cured and connected.

8. An orbital vehicle, characterized in that, It includes a bogie. The bogie includes a frame, and the frame is the frame according to any one of claims 1-7.

9. A processing method for a frame of a bogie, characterized in that A frame for processing the bogie according to any one of claims 1-7 above includes the following steps: Provide the upper cover plate of the frame and the frame body; Place the upper cover plate of the frame on the frame body, and wind the fiber composite material longitudinally around the crossbeam cover plate of the upper cover plate of the frame and the crossbeam body of the frame body, and cover at least one section in the transverse direction of the crossbeam cover plate and the frame body to form the first covering layer; Then wind the fiber composite material transversely around the middle parts of the frame body and the upper cover plate of the frame to cover the upper surface and the lower surface of the first covering layer and cover the middle parts of the side beam cover plate and the side beam body.

10. The processing method of the bogie frame according to claim 9, characterized in that, The winding method of the fiber composite material is: winding the fiber composite material or winding the three-dimensional braided preform of the fiber composite material and sewing the two ends.

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