Frame and bogie

Abstract

This application provides a frame and bogie, wherein the frame includes: a side beam, including a side beam upper cover plate, a side beam lower cover plate, a side beam inner vertical plate, a side beam outer vertical plate, a cap tube vertical plate, a cap tube cover plate, and a primary suspension damping seat; the side beam outer vertical plate and the side beam inner vertical plate are respectively connected between the side beam upper cover plate and the side beam lower cover plate, forming a first air spring auxiliary chamber; the cap tube cover plate is connected to the end of the side beam upper cover plate; the primary suspension damping seat is vertically connected to the lower end of the cap tube cover plate; two cap tube vertical plates are arranged side by side and are correspondingly connected to the cap tube cover plate and the side beam lower cover plate; the cap tube vertical plate, the cap tube cover plate, and the primary suspension damping seat form a receiving cavity for accommodating the primary suspension device; an axle box tie rod seat is provided in the area where the cap tube vertical plate extends to the middle of the side beam lower cover plate for connecting the axle box tie rod; and a crossbeam, connected between the middle of the two side beams. The frame and bogie provided in this application reduce the fatigue stress of the axle box tie rod seat, reduce the probability of fracture of the axle box tie rod seat, and improve driving reliability and safety.

Description

Technical Field

[0001] The present application relates to rail vehicle technology, in particular to a bogie frame and a bogie. Background Art

[0002] As the core load-bearing component of a rail vehicle bogie, the structural form of the bogie frame directly affects the vehicle running quality, wheel-rail interaction relationship and service life. The traditional externally-mounted axle box bogie, with the axle box arranged on the outer side of the wheels, has problems such as large lateral wheelset span, high unsprung mass, large wheel-rail interaction force, poor curve negotiation performance, and fast wheelset wear, making it difficult to meet the requirements of small-radius curve lines, high-density operation and long service life.

[0003] The internally-mounted axle box bogie, which arranges the axle box and the primary suspension between the two wheels, can effectively shorten the effective span of the wheelset, reduce the unsprung mass, improve the curve negotiation performance and reduce wheel-rail wear, and has become an important direction for the technical upgrading of the new generation bogies. Under this application background, developing a special bogie frame adapted to the internally-mounted axle box structure has become a key technical demand for the localization and performance improvement of core components of rail transit equipment.

[0004] The existing similar bogie frames usually adopt an "H" type or "double-square" structure welded by steel plates, the side beam is a "fish-belly" box-type structure, and the inner cavity can be used as an additional air chamber. A primary positioning seat is arranged at the end of the side beam, serving as the interface for axle box installation and primary suspension. The cross beam is a box-type assembled welded structure, which presents a hollow square structure as a whole, and is used for transmitting traction force, braking force and lateral buffer force. Although the existing scheme realizes the layout of internally-mounted axle boxes, it has defects such as poor structural stiffness matching, low integration of installation interfaces, excessively concentrated welds, and limited assembly and maintenance space, making it difficult to balance dynamic performance, structural strength and lightweight level, and difficult to meet the demand of high-speed and urban rail vehicles for bogies with lower energy consumption. Contents of the Invention

[0005] In order to solve one of the above technical defects, the embodiments of the present application provide a bogie frame and a bogie.

[0006] According to a first aspect of the embodiments of the present application, a bogie frame is provided, comprising: A side beam, comprising a side beam upper cover plate, a side beam lower cover plate, a side beam inner vertical plate, a side beam outer vertical plate, a sleeve vertical plate, a sleeve cover plate and a primary vertical damper seat; the side beam outer vertical plate and the side beam inner vertical plate are respectively connected between the side beam upper cover plate and the side beam lower cover plate, enclosing a first additional air spring chamber; the sleeve cover plate is connected to the end of the side beam upper cover plate; the primary vertical damper seat is vertically connected below the end of the sleeve cover plate; two sleeve vertical plates are arranged side by side and are correspondingly connected with the sleeve cover plate and the side beam lower cover plate; the sleeve vertical plates, the sleeve cover plate and the primary vertical damper seat enclose an accommodating cavity for accommodating a primary suspension device; the area of the sleeve vertical plate extending to the middle part of the side beam lower cover plate is provided with an axle box pull rod seat for connecting an axle box pull rod; A crossbeam connects the two side beams at their midpoints.

[0007] According to a second aspect of the embodiments of this application, a bogie is provided, comprising: the frame described above.

[0008] The technical solution provided in this application embodiment includes a side beam comprising an upper side beam cover plate, a lower side beam cover plate, an inner side beam upright plate, an outer side beam upright plate, a cap tube upright plate, a cap tube cover plate, and a primary suspension seat. The outer side beam upright plate and the inner side beam upright plate are respectively connected between the upper side beam cover plate and the lower side beam cover plate, forming a first air spring auxiliary chamber. The cap tube cover plate is connected to the end of the upper side beam cover plate. The primary suspension seat is vertically connected to the lower end of the cap tube cover plate. Two cap tube upright plates are arranged side by side and correspond to the cap tube upright plate and the lower side beam cover plate. The connection consists of a cap plate, a cap cover plate, and a primary suspension seat forming a cavity for accommodating the primary suspension device. An axle box tie rod seat is located in the area extending from the cap plate to the middle of the side beam lower cover plate, for connecting the axle box tie rod. A crossbeam, connected between the middle sections of the two side beams, shares the load stress through the cap plate and the axle box tie rod seat, thereby reducing the fatigue stress of the axle box tie rod seat, decreasing the probability of breakage, and thus reducing bogie failures and maintenance frequency, improving driving reliability and safety. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A top-view schematic diagram of the structure provided in the embodiments of this application; Figure 2 A bottom-view diagram of the structure provided in the embodiments of this application; Figure 3 A top view of the side beams in the frame provided in an embodiment of this application; Figure 4 A schematic diagram of the side beam in the frame provided in the embodiments of this application from a bottom view angle; Figure 5 This is a schematic diagram of another bottom view of the side beam in the frame provided in an embodiment of this application; Figure 6 This is a partial structural diagram of the side beam in the frame provided in the embodiment of this application; Figure 7 for Figure 6 A magnified view of area A in the middle; Figure 8 for Figure 4 A magnified view of area B in the middle; Figure 9A top view of the crossbeam in the frame provided in the embodiments of this application; Figure 10 A schematic diagram of the beam in the frame provided in the embodiment of this application from a bottom view angle; Figure 11 This is a partial structural diagram of the crossbeam in the framework provided in the embodiments of this application; Figure 12 This is a schematic diagram of another part of the crossbeam structure provided in the embodiment of this application; Figure 13 This is a schematic diagram of another architecture provided in an embodiment of this application; Figure 14 This is a schematic diagram of the side beam in another frame provided in an embodiment of this application.

[0010] Figure label: 1-Side beam; 11-Side beam upper cover plate; 12-Side beam lower cover plate; 13-Side beam inner vertical plate; 14-Side beam outer vertical plate; 15-Cap tube vertical plate; 16-Cap tube cover plate; 17-Primary suspension damper seat; 18-Axle box tie rod seat; 19-First side beam surrounding plate; 110-Second side beam surrounding plate; 1101-Connecting plate; 1102-Middle plate; 1103-Transverse plate; 1111-First mounting hole; 1112-Second mounting hole; 1113-Third mounting hole; 1114-Fourth mounting hole; 112-Anti-hunting vibration damper seat; 113-Mounting stiffener plate; 114-Drainage hole; 115-Connecting frame; 2-Crossbeam; 21-Crossbeam surround plate; 211-Upper plate section; 212-Vertical plate section; 213-Lower plate section; 22-Traction seat; 221-Connecting plate; 222-Stop plate; 23-Longitudinal stiffener; 24-Transverse stiffener; 25-Lifting block. Detailed Implementation

[0011] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0012] This embodiment provides a framework that can be applied to the bogies of rail vehicles. Rail vehicles can be conventional trains, high-speed trains, subway vehicles, light rail vehicles, etc. The framework provided in this embodiment can improve upon the problems of high fatigue stress existing in traditional solutions.

[0013] In this embodiment, the length direction of the rail vehicle is referred to as the longitudinal direction, the width direction of the rail vehicle is referred to as the transverse direction, and the height direction of the rail vehicle is referred to as the vertical direction.

[0014] like Figures 1 to 5 As shown, the frame provided in this embodiment includes: side beams 1 and cross beams 2. There are two side beams 1, which are parallel and arranged side by side. The cross beam 2 connects the two side beams 1 at their middle sections.

[0015] The two side beams 1 have basically the same structure. The side beam 1 includes a side beam upper cover plate 11, a side beam lower cover plate 12, a side beam inner vertical plate 13, a side beam outer vertical plate 14, a cap tube vertical plate 15, a cap tube cover plate 16, and a primary vertical reduction seat 17.

[0016] The upper side beam cover plate 11 and the lower side beam cover plate 12 are arranged vertically. The outer side beam vertical plate 14 and the inner side beam vertical plate 13 are respectively connected between the upper side beam cover plate 11 and the lower side beam cover plate 12, forming a first air spring auxiliary chamber. The cap plate 16 is connected to the end of the upper side beam cover plate 11 and extends in the same direction as the upper side beam cover plate 11. A primary damping seat 17 is vertically connected to the lower end of the cap plate 16, that is, the primary damping seat 17 extends vertically.

[0017] Two cap plate uprights 15 are arranged side by side and are correspondingly connected to the cap cover plate 16 and the side beam lower cover plate 12. The cap plate uprights 15 extend vertically, and their top ends are connected to the edges of the cap cover plate 16 and the side beam lower cover plate 12. The cap plate uprights 15, the cap cover plate 16, and the primary suspension reducer 17 form a receiving cavity for accommodating the primary suspension device. An axle box tie rod seat 18 is provided in the area where the cap plate uprights 15 extend to the middle of the side beam lower cover plate 12. One end of the axle box tie rod is connected to the axle box tie rod seat 18, and the other end is connected to the axle box. The axle box is located below the primary suspension device.

[0018] A cap plate 16 is provided at both ends of the upper cover plate 11 of the side beam, and a cap stand plate 15 is provided between each cap plate 16 and the adjacent lower cover plate 12 of the side beam. The cap stands 15 are arranged symmetrically below the side beam, and are symmetrical not only about the axis of symmetry in the length direction of the side beam, but also about the axis of symmetry in the width direction of the side beam.

[0019] In the traditional design, the axle box tie rod seat 18 is independently mounted on the bottom surface of the side beam. During vehicle movement, the load transmitted to the axle box tie rod seat 18 through the axle box tie rod is entirely absorbed by the axle box tie rod seat 18 itself, resulting in particularly high fatigue stress on the axle box tie rod seat 18, making it very easy to break. This leads to excessively high maintenance frequency of the bogie, affecting the normal operation of the vehicle and posing a high safety hazard.

[0020] In this embodiment, a cap plate 15 is provided on the bottom surface of the side beam 1. The cap plate 15 extends from the middle of the side beam 1 to below the cap cover plate 16 at the end of the side beam. The load transmitted to the axle box tie rod seat 18 through the axle box tie rod seat 18 can be transmitted to the cap plate 15 through the axle box tie rod seat 18. The load is shared by the cap plate 15 and the axle box tie rod seat 18, which greatly reduces the fatigue stress of the axle box tie rod seat 18 and reduces the probability of fracture of the axle box tie rod seat 18. This reduces the failure and maintenance frequency of the bogie and improves the reliability and safety of the vehicle.

[0021] The technical solution provided in this embodiment includes a side beam comprising an upper side beam cover plate, a lower side beam cover plate, an inner side beam upright plate, an outer side beam upright plate, a cap tube upright plate, a cap tube cover plate, and a primary suspension seat. The outer side beam upright plate and the inner side beam upright plate are respectively connected between the upper side beam cover plate and the lower side beam cover plate, forming a first air spring auxiliary chamber. The cap tube cover plate is connected to the end of the upper side beam cover plate. The primary suspension seat is vertically connected to the lower end of the cap tube cover plate. Two cap tube upright plates are arranged side by side and are correspondingly connected to the cap tube upright plate and the lower side beam cover plate. The cap plate, cap cover, and primary suspension seat together form a cavity for accommodating the primary suspension device. An axle box tie rod seat is located in the area extending from the cap plate to the middle of the side beam lower cover, for connecting the axle box tie rod. A crossbeam, connected between the middle of the two side beams, shares the load stress through the cap plate and axle box tie rod seat, thereby reducing the fatigue stress of the axle box tie rod seat, decreasing the probability of breakage, and thus reducing bogie failures and maintenance frequency, improving driving reliability and safety.

[0022] In addition, in traditional bogies, a forged primary suspension seat is welded to the side beam. This embodiment uses a cap-shaped structure, which, compared to the traditional primary suspension seat, reduces weight by approximately 25kg * 4 = 100kg.

[0023] Based on the above technical solution, the top shape of the hat stand plate 15 is matched and set according to the shape changes of the hat cover plate 16 and the side beam lower cover plate 12. The height of the hat stand plate 15 can be such that the height of the part connected to the hat cover plate 16 is greater than the height of the part connected to the side beam lower cover plate 12. This means that the height of the part of the hat stand plate 15 below the side beam lower cover plate 12 is relatively small, avoiding interference with the components below, and only needing to meet load transmission requirements. The height of the part of the hat stand plate 15 below the hat cover plate 16 is relatively large, forming a cavity to accommodate the primary suspension device, enabling the installation and positioning of the primary suspension device.

[0024] Based on the above technical solution, this embodiment further optimizes the structure of the side beam 1: the middle part of the lower cover plate 12 and the upper cover plate 11 of the side beam both extend outward to form a part for installing the air spring, and the part is provided with an opening for installing the air spring.

[0025] like Figure 6 , Figure 7 and Figure 8 As shown, the side beam 1 also includes a first side beam enclosure 19, which surrounds the middle outer surface of the side beam outer vertical plate 14 and is connected to the side beam upper cover plate 11 and the side beam lower cover plate 12 respectively, forming a second air spring auxiliary chamber. The side beam outer vertical plate 14 is provided with a through hole for connecting the first air spring auxiliary chamber and the second air spring auxiliary chamber. Both the first air spring auxiliary chamber and the second air spring auxiliary chamber serve as auxiliary chambers for the air spring, which can increase the buffer capacity of the air spring, thereby widening the load-bearing range of the vehicle body.

[0026] The first side beam enclosure 19 can be formed by bending a steel plate. The two ends of the first side beam enclosure 19 are welded to the outer surface of the side beam outer vertical plate 14, and the top end of the first side beam enclosure 19 is welded to the side beam upper cover plate 11, and the bottom end is welded to the side beam lower cover plate 12.

[0027] Furthermore, a second side beam enclosure 110 is adopted, which is installed around the outer surface of the first side beam enclosure 19 and connected to the upper cover plate 11 and the lower cover plate 12 of the side beam, respectively, to form an installation chamber. The second side beam enclosure 110 can also be made by bending a single steel plate. Both ends of the second side beam enclosure 110 are welded to the outer surface of the first side beam enclosure 19, and the top end of the second side beam enclosure 110 is welded to the upper cover plate 11 of the side beam, and the bottom end is welded to the lower cover plate 12 of the side beam. The second side beam enclosure 110 serves two purposes: firstly, to support and connect the upper cover plate 11 and the lower cover plate 12 of the side beam; secondly, it also serves as an installation space to realize the installation of the anti-roll device.

[0028] Specifically, the second side beam enclosure 110 and the first side beam enclosure 19 form an installation chamber. The lower cover plate 12 of the side beam corresponding to the installation chamber position is provided with an installation hole for connecting to the anti-roll device. This installation hole is a through hole. A bolt is passed through the through hole from above, then through the anti-roll device, and finally tightened at the bottom of the side beam with a nut and bolt to install the anti-roll device.

[0029] In traditional solutions, a separate anti-roll mount is typically welded to the bottom of the side beam. This mount has threaded holes, through which screws are passed to secure the anti-roll device. However, this process has several drawbacks. First, the threads are prone to damage during tightening, leading to connection failure and hindering quick replacement of the anti-roll device. This necessitates major repairs at the factory, disrupting vehicle operation. Second, the anti-roll mount bears a significant portion of the load, resulting in substantial fatigue stress and making it susceptible to damage. Third, welding the anti-roll mount to the lower cover plate of the side beam can cause welding deformation, requiring subsequent reshaping, which is time-consuming and can negatively impact structural stress.

[0030] In this embodiment, the anti-roll mounting bracket is eliminated, and threaded holes are not used. Instead, through holes are installed starting from the lower cover plate 12 of the side beam, connecting to the anti-roll device via bolts and nuts. This solves the problems of thread damage, high fatigue stress, and significant welding deformation that are common in traditional solutions. In the solution provided by this embodiment, the load is borne by the entire side beam, significantly reducing fatigue stress and eliminating welding deformation.

[0031] In this embodiment, four through holes are provided on the lower cover plate 12 of the side beam as mounting holes for connection with the anti-rollover device. The first mounting hole 1111 is located within the mounting space enclosed by the second side beam enclosure plate 110. The other three holes are located on the outer side of the second side beam enclosure plate 110.

[0032] One embodiment is as follows: the second side beam enclosure 110 includes a connecting plate 1101, a middle plate 1102, and a transverse plate 1103. The inner end of the connecting plate 1101 is connected to the outer surface of the first side beam enclosure 19, and the connecting plate 1101 extends in a direction away from the first side beam enclosure 19. One end of the middle plate 1102 is connected to the outer end of the connecting plate 1101, and the middle plate 1102 is parallel to the middle of the first side beam enclosure 19. The connecting plate 1101 and the middle plate 1102 can be formed by bending a single piece of steel plate.

[0033] The transverse plate 1103 is perpendicularly connected to the middle plate 1102, and the inner end of the transverse plate 1103 is connected to the outer surface of the first side beam enclosure 19, while the other end extends to connect with the anti-hunting damper seat 112. The top end of the transverse plate 1103 is connected to the upper cover plate 11 of the side beam, and the bottom end is connected to the lower cover plate 12 of the side beam.

[0034] A mounting rib 113 is also used, which is perpendicularly connected to the transverse plate 1103. The mounting rib 113, the transverse plate 1103, and the middle plate 1102 form a cross shape. On both sides of the mounting rib 113, the corresponding side beam lower cover plates 12 are respectively provided with a second mounting hole 1112 and a third mounting hole 1113 for connecting with the anti-roll device, for inserting bolts to connect with the anti-roll device. On the outer side of the second side beam enclosure plate 110, corresponding to the area enclosed by the transverse plate 1103, the side beam lower cover plate 12 is provided with another fourth mounting hole 1114 for connecting with the anti-roll device.

[0035] In addition, a drainage hole 114 is provided in the installation space enclosed by the second side beam 110 to drain water from the installation space.

[0036] Based on the above technical solution, this embodiment also provides an implementation method for the crossbeam 2: as follows Figures 9 to 12As shown, the crossbeam 2 includes two crossbeam panels 21. Each crossbeam panel 21 includes an upper plate section 211, a vertical plate section 212, and a lower plate section 213 formed by bending a steel plate. The upper plate sections 211 of the two crossbeam panels 21 are joined together, and the lower plate sections 213 are joined together to form the crossbeam 2.

[0037] In this embodiment, the crossbeam 2 is made of bent steel plate, which reduces the welding process, thereby reducing welding deformation and subsequent straightening procedures, and significantly improving production efficiency. Moreover, compared with the traditionally welded crossbeam, the crossbeam 2 formed by bending steel plate in this embodiment has fewer stiffeners, achieving a weight reduction of 100kg.

[0038] Each crossbeam enclosure 21 has a notch in its upper plate section 211, and the notches of the upper plate sections 211 of the two crossbeam enclosures are joined together to form a hole through which the center pin passes.

[0039] The inner surfaces of the vertical plate sections 212 of the two crossbeams are respectively provided with traction seats 22, and the inner surfaces of the traction seats 22 are provided with longitudinal stops. The space between the two longitudinal stops is used for the passage of the center pin.

[0040] The traction seat 22 includes two connecting plates 221 and a stop plate 222. The two connecting plates 221 are perpendicularly connected to the vertical plate section 212 of the crossbeam enclosure, and are also connected to the upper plate section 211 and the lower plate section 213 of the crossbeam enclosure. The two connecting plates 221 are spaced apart. The stop plate 222 is perpendicularly connected to the ends of the two connecting plates 221 opposite to the vertical plate section 212. A longitudinal stop is provided on the inner surface of the stop plate 222.

[0041] Several longitudinal stiffeners 23 and transverse stiffeners 24 are connected between the upper plate section 211 and the lower plate section 213 to improve the connection strength of the crossbeam 2.

[0042] A wheelset lifting block 25 is also provided on the outer surface of the lower plate section 213 for lifting the bogie.

[0043] The anti-hunting damper seats on both sides of the frame adopt an integrated design, integrating the anti-hunting damper with the secondary vertical damper interface to form a simple triangular stable structure, which is connected to the side beam by plugging. The anti-hunting damper installation interface adopts a simple protruding interface structure, and the secondary vertical damper structure adopts a shaft pin connection method. The anti-hunting damper is equipped with a slot-type anti-rotation structure to reduce the load on the shaft pin when the secondary vertical damper moves, and reduce the risk of loosening of the shaft pin nut.

[0044] In the above scheme, the lateral length of the vertical plate segment 212 is greater than that of the upper plate segment 211 and also greater than that of the lower plate segment 213. Correspondingly, the upper cover plate 11 and the lower cover plate 12 of the side beam both extend inward to form connecting parts, which connect with the upper plate segment 211 and the lower plate segment 213 of the crossbeam. The vertical plate segment 212 is inserted between the connecting parts and connected to the inner vertical plate 13 of the side beam.

[0045] This embodiment also provides another solution: such as Figure 13 and Figure 14 As shown, a rectangular connecting frame 115 is provided on the inner side of the middle part of the side beam 1. The structure corresponding to the crossbeam 2 is as follows: the upper plate segment 211, the lower plate segment 213 and the vertical plate segment 212 have equal transverse lengths and are respectively connected to the four sides of the connecting frame 115.

[0046] In the solution provided in this embodiment, through holes are provided in the upper cover plate 11, lower cover plate 12, upper plate section 211, and lower plate section 213 of the side beam, and they are connected to the corresponding components by bolts. The specific solution can be referred to the connection of the anti-roll device described above. Compared with the traditional solution of welding mounting seats separately on the side beam and crossbeam, the solution provided in this embodiment can reduce problems such as welding stress concentration and welding deformation, and also reduces the number of mounting seats, which can significantly reduce the weight of the bogie and achieve lightweight design to meet the high safety, high stability, long service life, and low wear requirements of high-speed trains, urban rail transit, and suburban rail vehicles.

[0047] Furthermore, the use of Q460NE, a higher strength grade material, instead of S355 grade material, and the use of thinner material to achieve structural functionality design, can further reduce the weight of the bogie.

[0048] The aforementioned framework, applied to bogies integrated within axle boxes, effectively shortens wheelset span, reduces unsprung mass, decreases wheel-rail interaction forces, enhances curve clearance, significantly reduces wheel-rail wear, and extends wheelset lifespan. The framework's structural stiffness is rationally matched, and its strength and fatigue performance meet the full life-cycle operational requirements of high-speed and urban rail vehicles, significantly improving operational safety and reliability. Highly integrated functional interfaces with a compact and rational layout effectively avoid assembly interference, improve accessibility for maintenance space, and enhance overall vehicle assembly efficiency and maintenance convenience. Optimized welding structures and lightweight design achieve weight reduction of the framework while ensuring mechanical performance, reducing vehicle energy consumption and improving operational economy. Low stress concentration in key areas, good weldability, low residual stress, and high product manufacturing consistency make it suitable for mass production and domestic application.

[0049] This embodiment also provides a bogie, including: the frame as described above, as well as wheelsets, axle boxes, primary suspension, secondary suspension, traction device, braking device, anti-hunting damper, anti-roll device, vertical damper, etc. The bogie provided in this embodiment has the same technical effects as the frame described above.

[0050] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0054] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A framework, characterized in that, include: The side beam includes an upper side beam cover plate, a lower side beam cover plate, an inner side beam vertical plate, an outer side beam vertical plate, a cap tube vertical plate, a cap tube cover plate, and a primary suspension damping seat. The outer side beam vertical plate and the inner side beam vertical plate are respectively connected between the upper side beam cover plate and the lower side beam cover plate, forming a first air spring auxiliary chamber. The cap tube cover plate is connected to the end of the upper side beam cover plate. The primary suspension damping seat is vertically connected to the lower end of the cap tube cover plate. Two cap tube vertical plates are arranged side by side and are correspondingly connected to the cap tube cover plate and the lower side beam cover plate. The cap tube vertical plate, the cap tube cover plate, and the primary suspension damping seat form a receiving cavity for accommodating the primary suspension device. An axle box tie rod seat is provided in the area where the cap tube vertical plate extends to the middle of the lower side beam cover plate for connecting the axle box tie rod. A crossbeam connects the two side beams at their midpoints.

2. The framework according to claim 1, characterized in that, In the hat stand plate, the height of the part connected to the hat cover plate is greater than the height of the part connected to the lower cover plate of the side beam.

3. The framework according to claim 1, characterized in that, The middle parts of the lower cover plate and the upper cover plate of the side beam both extend outward to form a part for installing the air spring; It also includes: a first side beam enclosure, which surrounds the middle outer surface of the side beam outer vertical plate and is connected to the side beam upper cover plate and the side beam lower cover plate respectively, forming a second air spring additional chamber; the side beam outer vertical plate is provided with a through hole for connecting the first air spring additional chamber and the second air spring additional chamber.

4. The framework according to claim 3, characterized in that, Also includes: The second side beam enclosure is installed on the outer surface of the first side beam enclosure and is connected to the upper and lower side beam covers respectively, forming an installation chamber. The lower side beam cover corresponding to the installation chamber is provided with an installation hole for connecting to the anti-roll device. The lower side beam cover on the outer side of the second side beam enclosure is provided with another installation hole for connecting to the anti-roll device.

5. The framework according to claim 4, characterized in that, The second side beam enclosure includes: a connecting plate, a middle plate, and a transverse plate; the inner end of the connecting plate is connected to the outer surface of the first side beam enclosure, and the connecting plate extends in a direction away from the first side beam enclosure; one end of the middle plate is connected to the outer end of the connecting plate, and the middle plate is parallel to the middle of the first side beam enclosure; the transverse plate is perpendicularly connected to the middle plate, and the inner end of the transverse plate is connected to the outer surface of the first side beam enclosure, and the other end extends to be connected to the anti-hunting damper seat.

6. The framework according to claim 5, characterized in that, Also includes: The stiffening ribs are installed perpendicularly to the transverse plates; the stiffening ribs, transverse plates, and middle plates form a cross shape; the lower cover plates of the corresponding side beams on both sides of the stiffening ribs are provided with mounting holes for connecting to the anti-rollover device; the mounting holes are used to insert bolts to connect to the anti-rollover device.

7. The framework according to claim 1, characterized in that, The crossbeam includes: two crossbeam panels; each crossbeam panel includes an upper plate section, a vertical plate section, and a lower plate section formed by bending a steel plate, with the upper plate sections of the two crossbeam panels joined together and the lower plate sections joined together; Each crossbeam panel has a notch in its upper section, and the notches in the upper sections of two crossbeam panels are joined together to form a hole through which the center pin passes.

8. The framework according to claim 7, characterized in that, The inner surfaces of the vertical sections of the two crossbeams are respectively provided with traction seats, and the inner surfaces of the traction seats are provided with longitudinal stops. The space between the two longitudinal stops is used for the passage of the center pin.

9. The framework according to claim 8, characterized in that, The traction seat includes: Two connecting plates are perpendicularly connected to the vertical section of the crossbeam enclosure, and the connecting plates are also connected to the upper and lower sections of the crossbeam enclosure; the two connecting plates are spaced apart. A stop plate is vertically connected to the ends of the two connecting plates opposite to the vertical plate section; a longitudinal stop is provided on the inner surface of the stop plate.

10. A bogie, characterized in that, include: The framework as described in any one of claims 1-9.

Images