Bogie frame, bogie and rail vehicle

Abstract

This invention relates to the field of rail vehicle technology, providing a bogie frame, a bogie, and a rail vehicle. The bogie frame includes a load-bearing body and two leaf springs. The load-bearing body is integrally cast from a high-strength cast material and includes two opposing C-shaped beams and two opposing airfoil beams located between the two C-shaped beams. Each airfoil beam has a mounting channel, wherein the two C-shaped beams and the two airfoil beams together form a center pin channel for mounting a center pin. Two leaf springs are respectively mounted in the two mounting channels, extending longitudinally along the load-bearing body. Each leaf spring has pads at both ends for connecting wheel axle sleeves. This design allows for rapid molding of the load-bearing body, achieving a high strength-to-weight ratio, while also avoiding welding defects in the frame. The simple structure of the load-bearing body and the leaf spring structure result in a significantly lighter weight compared to traditional side beams, resulting in a substantial weight reduction of the frame.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and more particularly to a bogie frame, a bogie, and a rail vehicle. Background Technology

[0002] Rail vehicles are widely used in daily travel, and lightweight design is a key research direction for rail vehicles. The current bogie frame adopts the structure of crossbeams and side beams. This structure has reached its limit in terms of weight optimization. Therefore, there is an urgent need for a new structure of bogie frame to further reduce the weight of the bogie. Summary of the Invention

[0003] This invention provides a bogie frame to achieve lightweight design of rail vehicles.

[0004] The present invention also provides a bogie.

[0005] The present invention also provides a rail vehicle.

[0006] This invention provides a steering architecture, comprising:

[0007] The supporting body is integrally cast and includes two opposing C-shaped beams and two opposing wing beams located between the two C-shaped beams. The two wing beams are respectively constructed with installation channels, wherein the two C-shaped beams and the two wing beams together enclose a center pin channel for installing a center pin.

[0008] Two leaf springs are respectively installed in the two mounting channels. The leaf springs extend longitudinally along the bearing body, and each leaf spring has a pad at both ends for connecting the wheelset bushing.

[0009] According to a bogie frame provided by the present invention, the airfoil includes:

[0010] The bottom beam is connected at both ends to the ends of the two C-shaped beams respectively, and a support extends from the middle of the bottom beam in the direction away from the central pin channel;

[0011] The top beam is located between the two C-shaped beams. One end of the top beam is bent downward to form a bend, which is connected to the support. The other end of the top beam extends laterally along the load-bearing body and is connected to both ends of the bottom beam through two connecting beams.

[0012] The bottom beam, the top beam, and the bent portion together form the installation channel.

[0013] According to a bogie frame provided by the present invention, one end of each of the bottom beams extends away from the C-shaped beam and forms a wing plate, and the end of the wing plate is provided with an anti-roll torsion bar seat.

[0014] Each of the C-shaped beams is provided with a roll load transfer beam below it, and the two ends of each roll load transfer beam are connected to the two ends of the C-shaped beam or the two bottom beams respectively.

[0015] The anti-roll load transfer beam near the wing plate bends toward the C-shaped beam, while the anti-roll load transfer beam away from the wing plate bends away from the C-shaped beam.

[0016] According to a bogie frame provided by the present invention, the lower surface of the bottom beam and the lower surface of the anti-roll load transfer beam are respectively provided with load transfer ribs, each load transfer rib is distributed along the length direction of the bottom beam and the anti-roll load transfer beam, and each load transfer rib is connected to the bottom beam and the anti-roll load transfer beam in a T-shape.

[0017] Each of the top beams has a reinforcing rib on its upper surface. Each of the reinforcing ribs is distributed along the length of the top beam and is connected to the top beam in a T-shape.

[0018] According to a steering frame provided by the present invention, each of the top beams is provided with a spring mounting seat on its upper surface, and the spring mounting seat is located above the mounting channel;

[0019] The air spring mounting base is provided with a mounting protrusion that protrudes outward in the direction away from the leaf spring, and the distance between the two air spring mounting bases is adapted to the distance between the two leaf springs.

[0020] According to a steering frame provided by the present invention, a leaf spring positioning part is formed on the lower surface of each of the top beams, and a connecting block is provided on the upper surface of the leaf spring. One of the leaf spring positioning part and the connecting block is configured with a concave mounting groove, and the other of the leaf spring positioning part and the connecting block is configured with an outward protrusion. The protrusion is adapted to engage with the mounting groove, and the protrusion and the mounting groove are respectively configured as matching cross shapes.

[0021] According to a bogie frame provided by the present invention, each of the top beams is provided with a motor mounting point;

[0022] Each of the top beams extends toward the central pin channel and is connected to a transverse stop mounting seat;

[0023] Each of the aforementioned bends has an anti-snake-like shock absorber seat on the side away from the mounting channel;

[0024] Each of the bottom beams is connected to a positioning swing arm seat at both ends;

[0025] Each of the aforementioned anti-roll load transfer beams has a traction rod seat on its lower surface.

[0026] According to a steering frame provided by the present invention, the leaf spring includes:

[0027] A carbon fiber top plate extends longitudinally along the supporting body, and the carbon fiber top plate is configured as an arc shape;

[0028] A carbon fiber base plate extends longitudinally along the supporting body. The carbon fiber base plate is arc-shaped and located below the carbon fiber top plate. The bending directions of the carbon fiber base plate and the carbon fiber top plate are on the same side. The arc of the carbon fiber base plate is greater than that of the carbon fiber top plate, and the thickness of the carbon fiber base plate is less than that of the carbon fiber top plate.

[0029] Multiple carbon fiber vertical plates are arranged vertically and side by side between the carbon fiber top plate and the carbon fiber bottom plate, and the multiple carbon fiber vertical plates are sequentially attached to each other;

[0030] The carbon fiber top plate and the carbon fiber bottom plate are arranged unidirectionally along the longitudinal direction, while the carbon fiber vertical plate is arranged bidirectionally and crosswise. The angle between the direction of the carbon fiber vertical plate and the horizontal plane is 45 degrees.

[0031] The upper surface of the pad is adapted to the lower surface of the carbon fiber base plate, and hooks extend upward from both sides of each pad, the hooks being adapted to be attached to the upper surface of the carbon fiber top plate.

[0032] The present invention also provides a bogie, including the bogie frame as described above.

[0033] The present invention also provides a rail vehicle, including a center pin, a car body and a bogie as described above, the bogie being connected to the car body via a spring, and the center pin passing through the center pin channel and being connected to the car body via a traction rod.

[0034] The bogie frame provided in this invention replaces the original crossbeam and side beam structure with a load-bearing body and leaf springs. The load-bearing body is integrally cast from high-strength casting material, enabling rapid molding and achieving a high strength-to-weight ratio, while also avoiding welding defects. The load-bearing body has a simple structure, and the leaf spring structure makes its weight significantly less than that of traditional side beams, resulting in a significant lightweight effect for the frame.

[0035] The bogie provided in this invention uses the aforementioned bogie frame, replacing the original crossbeam and side beam structure with a load-bearing body and leaf springs. The load-bearing body is integrally cast from high-strength casting material, enabling rapid molding and achieving a high strength-to-weight ratio, while also avoiding welding defects in the frame. The load-bearing body has a simple structure, and the leaf spring structure makes its weight significantly less than that of traditional side beams, resulting in a significant lightweight effect on the frame.

[0036] The rail vehicle provided in this invention features a bogie connected to the car body via air springs. A center pin passes through a center pin channel and is connected to the car body via a traction rod. The bogie employs the aforementioned bogie frame, utilizing a load-bearing body and leaf springs to replace the original crossbeams and side beams. The load-bearing body is integrally cast from high-strength casting material, enabling rapid molding and achieving a high strength-to-weight ratio while avoiding welding defects. The simple structure of the load-bearing body and the leaf spring's design result in a significantly lighter weight compared to traditional side beams, leading to substantial weight reduction of the frame. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is one of the three-dimensional structural schematic diagrams of the bogie frame provided by the present invention;

[0039] Figure 2 This is the second three-dimensional structural schematic diagram of the bogie frame provided by the present invention;

[0040] Figure 3 This is a three-dimensional structural schematic diagram of the supporting body provided by the present invention;

[0041] Figure 4 This is a partial three-dimensional structural diagram of the supporting body provided by the present invention;

[0042] Figure 5 This is a three-dimensional structural diagram of the leaf spring provided by the present invention.

[0043] Figure label:

[0044] 100. Load-bearing main body; 110. C-shaped beam; 1110. Roll load transfer beam; 120. Airfoil beam; 1210. Bottom beam; 1220. Support; 1230. Top beam; 1240. Bending section; 1250. Connecting beam; 1260. Flange plate; 1270. Roll torsion bar seat; 1280. Load transfer rib; 1290. Reinforcing rib; 130. Installation channel; 140. Center pin channel; 200. Leaf spring; 21. 0. Pad; 220. Connecting block; 230. Mounting groove; 240. Carbon fiber top plate; 250. Carbon fiber bottom plate; 260. Carbon fiber upright plate; 270. Hook; 300. Air spring mounting seat; 310. Mounting protrusion; 400. Leaf spring positioning part; 410. Protrusion; 500. Motor mounting point; 600. Anti-snake shock absorber seat; 700. Positioning swing arm seat; 800. Traction rod seat; 900. Lateral stop mounting seat. Detailed Implementation

[0045] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0046] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention 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. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0048] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] The following is combined Figures 1-5 Embodiments of the present invention are described.

[0051] This embodiment provides a bogie frame, mainly including a load-bearing body 100 and two leaf springs 200. The load-bearing body 100 is integrally cast from high-strength casting material. The load-bearing body 100 includes two opposing C-shaped beams 110 and two opposing airfoil beams 120 disposed between the two C-shaped beams 110. The two airfoil beams 120 are respectively constructed with mounting channels 130. The two C-shaped beams 110 and the two airfoil beams 120 together form a center pin channel 140 for mounting a center pin. The two leaf springs 200 are respectively mounted in the two mounting channels 130. The leaf springs 200 extend longitudinally along the load-bearing body 100, and each end of the leaf spring 200 is provided with a pad 210 for connecting the wheelset bushing.

[0052] In this embodiment, the original crossbeam and side beam structure is replaced by a load-bearing body 100 and leaf springs 200. The load-bearing body 100 is integrally cast from high-strength casting material, enabling rapid molding and achieving a high strength-to-weight ratio, while also avoiding welding defects in the frame. The load-bearing body 100 has a simple structure, and the structural form of the leaf springs 200 makes their weight significantly less than that of traditional side beams, resulting in a significant lightweight effect on the frame.

[0053] The structure of C-beam 110 and airfoil 120 can be designed based on the load transfer of the frame. The topology of C-beam 110 and airfoil 120 can be optimized based on the load-bearing conditions at each location, so that C-beam 110 and airfoil 120 not only have good load-bearing performance, but also have the advantages of simple structure and less material consumption, so as to achieve lightweight design of the frame.

[0054] The vertical load on the frame is mainly borne by two leaf springs 200, while the lateral and longitudinal loads are borne and transmitted through the load-bearing body 100.

[0055] According to the bogie frame provided by the present invention, the airfoil beam 120 includes a bottom beam 1210 and a top beam 1230. The two ends of the bottom beam 1210 are respectively connected to the ends of two C-shaped beams 110. A support 1220 extends from the middle of the bottom beam 1210 in a direction away from the center pin channel 140. The top beam 1230 is located between the two C-shaped beams 110. One end of the top beam 1230 is bent downwards to form a bend 1240, which is connected to the support 1220. The other end of the top beam 1230 extends laterally along the load-bearing body 100 and is connected to both ends of the bottom beam 1210 via two connecting beams 1250. The bottom beam 1210, top beam 1230, and bend 1240 together form an installation channel 130.

[0056] like Figure 2 and Figure 3 As shown, the bottom beam 1210 is located below the top beam 1230. The bottom beam 1210 is arranged longitudinally along the load-bearing body 100, and the top beam 1230 is arranged transversely along the load-bearing body 100, meaning that the top beam 1230 and the bottom beam 1210 are spatially perpendicular to each other. One end of the top beam 1230 is bent vertically downwards to form a bend 1240, and the bend is connected by an arc-shaped transition. The bend 1240 is connected to the support 1220 in the middle of the bottom beam 1210, so that one end of the top beam 1230 is connected to the middle of the bottom beam 1210 to form a whole. The other end of the top beam 1230 is connected to both ends of the bottom beam 1210 through two connecting beams 1250, so that the other end of the top beam 1230 is connected to both ends of the bottom beam 1210 to form a whole.

[0057] Along the direction from the end of the top beam 1230 away from the bend 1240 to the end of the bottom beam 1210, the thickness of the connector gradually increases to meet the load-bearing requirements. The connector is generally arc-shaped, and along the direction from the end of the top beam 1230 away from the bend 1240 to the end of the bottom beam 1210, the connector is slightly bent toward the center pin channel 140.

[0058] After the connector connects the ends of the top beam 1230 and the bottom beam 1210, the L-shaped top beam 1230 and the middle of the bottom beam 1210 can enclose the aforementioned mounting channel 130, which is used to connect the leaf spring 200. The height of the mounting channel 130 is exactly matched with the maximum height of the leaf spring 200, thereby fixing the middle of the leaf spring 200 in the mounting channel 130. The width of the mounting channel 130 is matched with the width of the leaf spring 200, so that the leaf spring 200 can be inserted into the mounting channel 130.

[0059] One end of each bottom beam 1210 extends away from the C-shaped beam 110 to form a flange 1260, and the end of the flange 1260 is equipped with an anti-roll torsion bar seat 1270. The anti-roll torsion bar seat 1270 is used to install an anti-roll torsion bar to achieve anti-roll of the frame. The flange 1260 allows the anti-roll torsion bar seat 1270 to meet the required installation position.

[0060] Below each C-shaped beam 110, there is a roll load transfer beam 1110, and the two ends of each roll load transfer beam 1110 are connected to the two ends of the C-shaped beam 110 or the two bottom beams 1210, respectively. The roll load transfer beam 1110 is used to transfer the roll load to meet the requirements of roll load transfer.

[0061] Both anti-roll load transfer beams 1110 are bent. The anti-roll load transfer beam 1110 closer to the flange 1260 bends towards the C-shaped beam 110, while the anti-roll load transfer beam 1110 farther from the flange 1260 bends away from the C-shaped beam 110, so that each anti-roll load transfer beam 1110 can meet its own load transfer requirements.

[0062] Load transfer ribs 1280 are provided on the lower surface of the bottom beam 1210 and the lower surface of the anti-roll load transfer beam 1110, respectively. Each load transfer rib 1280 is distributed along the length direction of the bottom beam 1210 and the anti-roll load transfer beam 1110, and each load transfer rib 1280 is connected to the bottom beam 1210 and the anti-roll load transfer beam 1110 in a T-shape. Each top beam 1230 is provided with reinforcing ribs 1290 on its upper surface, each reinforcing rib 1290 is distributed along the length direction of the top beam 1230, and each reinforcing rib 1290 is connected to the top beam 1230 in a T-shape.

[0063] The load transfer ribs 1280 assist the bottom beam 1210 and the anti-roll load transfer beam 1110 in transferring loads, thereby improving the structural strength and fatigue strength of the bottom beam 1210 and the anti-roll load transfer beam 1110, and further ensuring that the bottom beam 1210 and the anti-roll load transfer beam 1110 meet the load transfer requirements. Each load transfer rib 1280 is connected to the bottom beam 1210 and the anti-roll load transfer beam 1110 in a T-shape, making the structure formed by the load transfer ribs 1280, the bottom beam 1210 and the anti-roll load transfer beam 1110 more stable, while also meeting the lightweight design requirements.

[0064] The stiffeners 1290 assist the top beam 1230 in transferring loads, improving its structural strength and fatigue strength, and further ensuring that the top beam 1230 meets the load transfer requirements. Each stiffener 1290 is connected to the top beam 1230 in a T-shape, making the structure formed by the stiffeners 1290 and the top beam 1230 more stable, while also meeting lightweight design requirements.

[0065] Each top beam 1230 has a spring mounting seat 300 on its upper surface, which is located above the mounting channel 130. The spring mounting seat 300 has a mounting protrusion 310 that protrudes outward in the direction away from the leaf spring 200, and the distance between the two spring mounting seats 300 is adapted to the distance between the two leaf springs 200.

[0066] The air spring mounting base 300 is used to connect the air spring. The air spring mounting base 300 has a protrusion 410 that protrudes outward in the direction opposite to the leaf spring 200. The air spring has a groove corresponding to the protrusion 410. When installing the air spring, aligning the groove of the air spring with the protrusion 410 can achieve the positioning and installation of the air spring. Compared with the traditional method of inserting the air spring into the mounting base, the above method prevents the air spring from being inserted into the mounting channel 130, thus preventing the air spring from damaging the leaf spring 200 inside the mounting channel 130.

[0067] The spacing between the two air spring mounting seats 300 is adapted to the spacing between the two leaf springs 200. Specifically, the spacing between the two air spring mounting seats 300 is the same as the spacing between the two leaf springs 200 to avoid generating additional torque on the leaf springs 200.

[0068] Each top beam 1230 has a leaf spring 200 positioning part formed on its lower surface. The upper surface of the leaf spring 200 is provided with a connecting block 220. One of the leaf spring 200 positioning part and the connecting block 220 is constructed with a concave mounting groove 230. The other of the leaf spring 200 positioning part and the connecting block 220 is constructed with an outward protrusion 410. The protrusion 410 is adapted to be engaged with the mounting groove 230. The protrusion 410 and the mounting groove 230 are respectively set as matching cross shapes.

[0069] The mounting groove 230 on the leaf spring 200 mounting part and the protrusion 410 on the connecting block 220 cooperate with each other to achieve the positioning and installation of the leaf spring 200. The protrusion 410 and the mounting groove 230 are respectively set as matching cross shapes to achieve the longitudinal and lateral limiting functions of the leaf spring 200. Specifically, the leaf spring 200 mounting part is constructed with a cross-shaped protrusion 410, and the connecting block 220 is constructed with a cross-shaped mounting groove 230.

[0070] Each top beam 1230 is provided with a motor mounting point 500 for suspending and installing the motor. The motor is connected to the motor mounting point 500 via a suspension rod.

[0071] Each top beam 1230 extends toward the central pin channel 140 and is connected to a transverse stop mounting seat 900, thereby realizing the installation of the transverse stop.

[0072] Each bend 1240 has an anti-snake damper seat 600 on the side away from the installation channel 130 for installing the anti-snake damper.

[0073] Each bottom beam 1210 has a positioning swing arm seat 700 connected to both ends for mounting the trapezoidal groove positioning swing arm.

[0074] Each anti-roll load transfer beam 1110 has a traction rod seat 800 on its lower surface for mounting traction rods.

[0075] The leaf spring 200 includes a carbon fiber top plate 240, a carbon fiber bottom plate 250, and multiple carbon fiber vertical plates 260. The carbon fiber top plate 240 extends longitudinally along the supporting body 100 and is arc-shaped. The carbon fiber bottom plate 250 also extends longitudinally along the supporting body 100 and is arc-shaped. The bottom plate 250 is located below the carbon fiber top plate 240, and the bending directions of the bottom plate 250 and the top plate 240 are towards the same side. The curvature of the bottom plate 250 is greater than that of the top plate 240, and the thickness of the bottom plate 250 is less than that of the top plate 240. The multiple carbon fiber vertical plates 260 are arranged vertically and side by side between the top plate 240 and the bottom plate 250, and are sequentially attached to each other.

[0076] The carbon fiber top plate 240, carbon fiber bottom plate 250, and multiple carbon fiber vertical plates 260 constitute the carbon fiber leaf spring 200, thereby reducing the weight of the leaf spring 200 and facilitating the weight reduction of the frame. The curved carbon fiber top plate 240 and the curved carbon fiber bottom plate 250 both enhance the load-bearing capacity of the leaf spring 200. The bending directions of the carbon fiber bottom plate 250 and the carbon fiber top plate 240 are towards the same side, and the curvature of the carbon fiber bottom plate 250 is greater than that of the carbon fiber top plate 240, so that the upper carbon fiber top plate 240 and the lower carbon fiber bottom plate 250 can withstand compression.

[0077] The thickness of the carbon fiber base plate 250 is less than that of the carbon fiber top plate 240, so that the upper carbon fiber top plate 240 and the lower carbon fiber base plate 250 can withstand pressure.

[0078] Multiple carbon fiber uprights 260 are vertically and side-by-side between the carbon fiber top plate 240 and the carbon fiber bottom plate 250, with the uprights 260 sequentially attached to each other. The number of carbon fiber uprights 260 can be selected based on actual stiffness requirements. In this embodiment, 10 carbon fiber uprights 260 are used.

[0079] In this design, the carbon fiber top plate 240 and carbon fiber bottom plate 250 have carbon fibers arranged unidirectionally along the longitudinal direction, while the carbon fiber vertical plate 260 has carbon fibers arranged in a bidirectional cross pattern. Furthermore, the angle between the direction of the carbon fiber in the vertical plate 260 and the horizontal plane is 45 degrees. This unique carbon fiber arrangement ensures both the strength and lightweight design of the leaf spring 200.

[0080] The upper surface of the pad 210 is adapted to the lower surface of the carbon fiber base plate 250. Each pad 210 has a hook 270 extending upward from both sides. The hook 270 is suitable for hanging on the upper surface of the carbon fiber top plate 240. By using the hook 270 to fix the pad 210, the longitudinal and lateral forces of the pad 210 are not constrained. Specifically, the pad 210 is a rubber block.

[0081] On the other hand, the present invention also provides a bogie, including the bogie frame in the foregoing embodiments.

[0082] In this embodiment, by using the aforementioned bogie frame, the original crossbeam and side beam structure is replaced by the load-bearing body 100 and leaf spring 200. The load-bearing body 100 is integrally cast from high-strength casting material, enabling rapid molding and achieving a high strength-to-weight ratio, while also avoiding welding defects in the frame. The load-bearing body 100 has a simple structure, and the structural form of the leaf spring 200 makes its weight significantly less than that of traditional side beams, resulting in a significant lightweight effect for the frame.

[0083] In another aspect, the present invention also provides a rail vehicle, including a center pin, a car body and a bogie as described in the foregoing embodiment, wherein the bogie is connected to the car body by a spring, and the center pin passes through a center pin channel 140 and is connected to the car body by a traction rod.

[0084] In this embodiment, the bogie is connected to the car body via air springs. The center pin passes through the center pin channel 140 and is connected to the car body via a traction rod. The bogie employs the aforementioned bogie frame, using a load-bearing body 100 and leaf springs 200 to replace the original crossbeam and side beam structure. The load-bearing body 100 is integrally cast from high-strength casting material, enabling rapid molding and achieving a high strength-to-weight ratio, while also avoiding welding defects in the frame. The simple structure of the load-bearing body 100 and the structural form of the leaf springs 200 result in a weight significantly less than that of traditional side beams, leading to a significant lightweight effect in the frame.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steering frame, characterized in that, include: The supporting body is integrally cast and includes two opposing C-shaped beams and two opposing wing beams located between the two C-shaped beams. The two wing beams are respectively constructed with installation channels, wherein the two C-shaped beams and the two wing beams together enclose a center pin channel for installing a center pin. Two leaf springs are respectively installed in the two mounting channels. The leaf springs extend longitudinally along the bearing body, and each leaf spring has a pad at both ends for connecting the wheelset bushing. The airfoil includes: The bottom beam is connected at both ends to the ends of the two C-shaped beams respectively, and a support extends from the middle of the bottom beam in the direction away from the central pin channel; The top beam is located between the two C-shaped beams. One end of the top beam is bent downward to form a bend, which is connected to the support. The other end of the top beam extends laterally along the load-bearing body and is connected to both ends of the bottom beam through two connecting beams. The bottom beam, the top beam, and the bent portion together form the installation channel.

2. The steering frame according to claim 1, characterized in that, One end of each of the bottom beams extends away from the C-shaped beam and forms a wing plate, and the end of the wing plate is provided with an anti-roll torsion bar seat. Each of the C-shaped beams is provided with a roll load transfer beam below it, and the two ends of each roll load transfer beam are connected to the two ends of the C-shaped beam or the two bottom beams respectively. The anti-roll load transfer beam near the wing plate bends toward the C-shaped beam, while the anti-roll load transfer beam away from the wing plate bends away from the C-shaped beam.

3. The steering frame according to claim 2, characterized in that, The lower surface of the bottom beam and the lower surface of the anti-roll load transfer beam are respectively provided with load transfer ribs. Each load transfer rib is distributed along the length direction of the bottom beam and the anti-roll load transfer beam, and each load transfer rib is connected to the bottom beam and the anti-roll load transfer beam in a T-shape. Each of the top beams has a reinforcing rib on its upper surface. Each of the reinforcing ribs is distributed along the length of the top beam and is connected to the top beam in a T-shape.

4. The steering frame according to claim 1, characterized in that, Each of the top beams is provided with a spring mounting seat on its upper surface, and the spring mounting seat is located above the mounting channel; The air spring mounting base is provided with a mounting protrusion that protrudes outward in the direction away from the leaf spring, and the distance between the two air spring mounting bases is adapted to the distance between the two leaf springs.

5. The bogie frame according to claim 1, characterized in that, Each of the top beams has a leaf spring positioning part formed on its lower surface, and a connecting block is provided on the upper surface of the leaf spring. One of the leaf spring positioning part and the connecting block is configured with a concave mounting groove, and the other of the leaf spring positioning part and the connecting block is configured with an outward protrusion. The protrusion is adapted to be engaged with the mounting groove, and the protrusion and the mounting groove are respectively configured as matching cross shapes.

6. The steering frame according to claim 3, characterized in that, Each of the aforementioned top beams is provided with a motor mounting point; Each of the top beams extends toward the central pin channel and is connected to a transverse stop mounting seat; Each of the aforementioned bends has an anti-snake-like shock absorber seat on the side away from the mounting channel; Each of the bottom beams is connected to a positioning swing arm seat at both ends; Each of the aforementioned anti-roll load transfer beams has a traction rod seat on its lower surface.

7. The bogie frame according to any one of claims 1-6, characterized in that, The leaf spring includes: A carbon fiber top plate extends longitudinally along the supporting body, and the carbon fiber top plate is configured as an arc shape; A carbon fiber base plate extends longitudinally along the supporting body. The carbon fiber base plate is arc-shaped and located below the carbon fiber top plate. The bending directions of the carbon fiber base plate and the carbon fiber top plate are on the same side. The arc of the carbon fiber base plate is greater than that of the carbon fiber top plate, and the thickness of the carbon fiber base plate is less than that of the carbon fiber top plate. Multiple carbon fiber vertical plates are arranged vertically and side by side between the carbon fiber top plate and the carbon fiber bottom plate, and the multiple carbon fiber vertical plates are sequentially attached to each other; The carbon fiber top plate and the carbon fiber bottom plate are arranged unidirectionally along the longitudinal direction, while the carbon fiber vertical plate is arranged bidirectionally and crosswise. The angle between the direction of the carbon fiber vertical plate and the horizontal plane is 45 degrees. The upper surface of the pad is adapted to the lower surface of the carbon fiber base plate, and hooks extend upward from both sides of each pad, the hooks being adapted to be attached to the upper surface of the carbon fiber top plate.

8. A bogie, characterized in that, Includes the steering frame as described in any one of claims 1-7.

9. A rail vehicle, characterized in that, It includes a center pin, a car body, and a bogie as described in claim 8, wherein the bogie is connected to the car body via an air spring, and the center pin passes through the center pin channel and is connected to the car body via a traction rod.

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