The crossbeam composition, frame, and bogie of a rail vehicle.

Abstract

This invention provides a bogie crossbeam assembly, frame, bogie, and rail vehicle. The bogie crossbeam assembly includes a crossbeam section formed by integrally molding a rectangular frame from carbon fiber. The interior of the crossbeam section is divided into multiple cavities, each a channel structure extending longitudinally along the bogie. These cavities include a pair of first cavities, symmetrically arranged on both sides of the crossbeam section's cross-section, allowing a pair of longitudinal beams of the bogie to pass through and connect to these first cavities. In this bogie frame, the longitudinal beams can pass through the first crossbeams, achieving a reliable connection between the crossbeam and longitudinal beam sections within the entire carbon fiber frame. Therefore, this crossbeam assembly and frame, while meeting the lightweight requirements of rail vehicles, achieves versatility in assembly, reliable connection, and accuracy with longitudinal beams of various materials, thereby improving the operational safety and stability of the bogie frame and the entire bogie.

Description

Technical Field

[0001] This invention relates to the field of rail vehicles, and provides a bogie beam composition, frame, bogie, and rail vehicle. Background Technology

[0002] With the rapid development of rail transit, bogies for rail vehicles have become a key research and development focus in the industry. Traditional metal bogie frames typically use two round or square tubes welded together with auxiliary beams and mounting supports. Metal bogie beams are heavy, and their manufacturing process is complex, requiring numerous steps such as material preparation and welding. Furthermore, metal bogie beams are prone to corrosion.

[0003] To reduce the weight of the bogie crossbeam, a typical carbon fiber bogie crossbeam exists. This crossbeam is formed by combining multiple U-shaped split cavity structures, welding the crossbeam between two parallel longitudinal beams, with the length of these cavities arranged transversely along the car body (bogie). However, this crossbeam can only connect to the longitudinal beams of a traditional box-type structure. Furthermore, due to limitations in the connection structure between the crossbeam and longitudinal beams, and the manufacturing process of carbon fiber materials, many critical components in the bogie frame (such as anti-hunting dampers, motors, and air springs) cannot achieve a reliable connection with the crossbeam, and the connection strength and accuracy cannot be guaranteed. This poses a significant risk to the operational safety and stability of the bogie frame and even the entire bogie. Summary of the Invention

[0004] This invention provides a crossbeam assembly for a bogie, which addresses the shortcomings of traditional metal bogie frames where the crossbeams are too heavy, have complex molding processes, and are prone to internal corrosion, while typical carbon fiber bogie crossbeams cannot be reliably connected to many key components in the frame. The crossbeam assembly achieves the connectivity of longitudinal beams made of various materials while meeting the lightweight requirements of rail vehicles.

[0005] The present invention also provides a bogie frame.

[0006] The present invention also provides a bogie.

[0007] The present invention also provides a rail vehicle.

[0008] The present invention provides a bogie crossbeam assembly, comprising a crossbeam portion integrally formed from carbon fiber into a rectangular frame, the interior of the crossbeam portion being divided into multiple cavities, each of the multiple cavities being a channel structure extending longitudinally along the bogie; the multiple cavities include a pair of first cavities, and within the cross-section of the crossbeam portion, the pair of first cavities are symmetrically arranged on both transverse sides of the crossbeam portion, so that a pair of longitudinal beam portions of the bogie can respectively pass through and connect to the pair of first cavities.

[0009] According to a bogie crossbeam assembly of the present invention, the plurality of cavities include a central cavity, a pair of first cavities, and a pair of second cavities.

[0010] The central cavity is located in the middle of the crossbeam portion. The central cavity has a central hole that extends through the upper and lower surfaces of the crossbeam portion. The central hole is used to position and install the central pin assembly.

[0011] A pair of the first cavities are symmetrically constructed on both sides of the central cavity.

[0012] A pair of second cavities are symmetrically constructed on both sides of the central cavity, and a pair of first cavities are located between the pair of second cavities.

[0013] According to a bogie crossbeam assembly of the present invention, the crossbeam assembly further includes two sets of traction connection assemblies, the two sets of traction connection assemblies being respectively installed on the crossbeam portion and symmetrically arranged at both longitudinal ends of the crossbeam portion with the axis of the central hole as the axis of symmetry; each set of traction connection assemblies includes a motor connection seat, a longitudinal tie rod connection seat and a pair of positioning tie rod connection seats, the motor connection seat, the longitudinal tie rod connection seat and the pair of positioning tie rod connection seats being connected to the lower surface of the crossbeam portion and located at the end of the crossbeam portion facing the wheelset assembly; wherein, the longitudinal tie rod connection seat is connected to one side of the motor connection seat and is integrally formed with the motor connection seat.

[0014] According to a bogie crossbeam assembly of the present invention, the height of the central cavity is less than the height of the first cavity, so that the lower surface of the crossbeam forms an upwardly recessed groove structure at the position of the central cavity, and the motor connection part is connected to the groove structure; the motor connection part is provided with a longitudinally penetrating connection hole.

[0015] According to a bogie crossbeam assembly of the present invention, the crossbeam assembly further includes a pair of vibration damping connection components; the pair of vibration damping connection components includes an anti-hunting vibration damping mounting seat, an anti-roll vibration damping mounting seat, and a pair of lateral vibration damping mounting seats; wherein, the pair of anti-hunting vibration damping mounting seats and the pair of anti-roll vibration damping mounting seats are symmetrically connected to the side wall of the crossbeam portion with the longitudinal centerline of the central cavity as the axis of symmetry, and the anti-roll vibration damping mounting seat located on the same side is disposed at the front end of the anti-hunting vibration damping mounting seat; wherein, the pair of lateral vibration damping mounting seats are connected to the upper surface of the crossbeam portion and are diagonally symmetrically arranged with the axis of the central hole as the axis of symmetry.

[0016] According to a bogie beam assembly of the present invention, the anti-hunting vibration damping mounting base includes a first connecting portion and a second connecting portion.

[0017] The first connecting part is L-shaped and fixed to the side wall and lower surface of the crossbeam. The vertical surface of the first connecting part has several protrusions.

[0018] The second connecting part includes a connected base and a U-shaped seat. The base is fixed to the protrusion of the first connecting part, and the U-shaped seat is flatly connected to the base.

[0019] According to a bogie crossbeam assembly of the present invention, the crossbeam assembly further includes a pair of height valve assemblies, the pair of height valve assemblies being symmetrically connected to the side wall ends of the crossbeam portion with the longitudinal centerline of the central cavity as the axis of symmetry.

[0020] The height valve assembly includes a linkage mechanism and a height valve unit.

[0021] The linkage mechanism has one end inserted into the second cavity and is fixedly connected to the anti-roll vibration damping mounting seat on the corresponding side through the side wall of the crossbeam.

[0022] A height valve unit is connected to the other end of the linkage mechanism, and the height valve unit is located in front of the crossbeam.

[0023] According to a bogie crossbeam assembly of the present invention, the crossbeam assembly further includes a pair of booster cylinder mounting seats, the pair of booster cylinder mounting seats being mounted on the lower surface of the crossbeam portion and symmetrically arranged on both sides of the crossbeam portion with the axis of the central hole as the axis of symmetry.

[0024] According to a bogie beam assembly of the present invention, the plurality of cavities further includes a pair of spacer cavities; the pair of spacer cavities are symmetrically constructed on both sides of the central cavity, and the pair of spacer cavities are located between a pair of first cavities; wherein, a reinforcing rib is installed in each of the spacer cavities; wherein, the lower surface of each of the spacer cavities is constructed as a slope.

[0025] The present invention provides a bogie frame, comprising the crossbeam assembly of the bogie as described above, and a pair of longitudinal beams.

[0026] A pair of longitudinal beams pass through a pair of first cavities formed by the crossbeams along the longitudinal direction of the bogie.

[0027] According to the present invention, a bogie frame is provided, the bogie frame further comprising a secondary suspension assembly, the secondary suspension assembly comprising a pair of air springs, a pair of air spring mounting seats being fixedly connected to the upper wall of a pair of first cavities, the pair of air springs being respectively fixedly mounted on the pair of air spring mounting seats; a positioning connection structure is provided in each first cavity, and each longitudinal beam is connected to the air spring on the corresponding side through the positioning connection structure.

[0028] According to the bogie frame provided by the present invention, a recessed positioning hole is formed at the center of the lower surface of the air spring; the positioning connection structure includes a positioning part and a guide post, the guide post is connected to the upper surface of the positioning part, the guide post can pass through the upper wall of the first cavity and be inserted into the positioning hole of the air spring; the lower surface of the positioning part is formed with a positioning boss, the longitudinal beam part includes a leaf spring unit and a connecting unit, the leaf spring unit is arranged along the longitudinal direction of the bogie, the connecting unit is assembled in the middle of the upper surface of the leaf spring unit, the upper surface of the connecting unit is formed with a positioning groove, and the positioning and installation between the connecting unit of the longitudinal beam part and the positioning part of the positioning connection structure is realized by the snap-fit ​​fixing of the positioning boss and the positioning groove.

[0029] According to the bogie frame provided by the present invention, the positioning boss and the positioning groove are configured in a cross shape or a star shape.

[0030] The present invention provides a bogie consisting of a crossbeam as described above; or a bogie frame as described above.

[0031] The present invention provides a rail vehicle comprising a crossbeam with a bogie as described above; or a frame with a bogie as described above; or a bogie as described above.

[0032] The above-described one or more technical solutions of the present invention have at least one of the following technical effects.

[0033] The bogie crossbeam assembly (hereinafter referred to as the "crossbeam assembly") provided by this invention includes a crossbeam section formed by integrally molding a rectangular frame from carbon fiber. The crossbeam section, constructed entirely from carbon fiber, significantly reduces the overall weight of the bogie, meeting the lightweight requirements of rail vehicles. The interior of the crossbeam section is divided into multiple cavities, further reducing the material proportion of structural components and thus achieving weight reduction. These cavities are channel structures extending longitudinally along the bogie. This channel structure, combined with the overall rectangular frame structure of the crossbeam section, allows the crossbeam section to bear greater longitudinal and vertical loads while ensuring basic lateral load bearing capacity, thereby improving the overall load-bearing capacity of the crossbeam section. The multiple cavities include a pair of first cavities. Within the cross-section of the crossbeam section, the pair of first cavities are symmetrically arranged on both sides of the transverse direction of the crossbeam section, allowing a pair of longitudinal beams of the bogie to pass through and connect to the pair of first cavities. The first cavity provides a dedicated connection and protection area for the longitudinal beams, allowing most of the key structures in the frame (such as traction components, shock absorber components, drive components, etc.) to be directly connected to the crossbeams. This also enables the crossbeam assembly to be reliably interchangeable with various longitudinal beams. For example, a longitudinal beam with a carbon fiber leaf spring structure can be installed in this frame, or it can be adapted to a traditional longitudinal beam structure, effectively improving the assembly versatility of the crossbeam assembly in frames with different structures.

[0034] The present invention also provides a bogie frame (hereinafter referred to as the "frame"), comprising the crossbeam assembly as described above, and a pair of longitudinal beams, the pair of longitudinal beams passing through a pair of first cavities of the crossbeam assembly along the longitudinal direction of the bogie. By setting the crossbeam assembly as described above, the frame possesses at least all the advantages of the aforementioned crossbeam assembly, and will not be repeated here. Furthermore, since the longitudinal beams of the frame can pass through the first crossbeams, a reliable connection between the crossbeams and longitudinal beams in the entire carbon fiber frame is achieved, thereby improving the connection strength between the longitudinal beams and the secondary suspension assembly, and further improving the load-bearing capacity, positioning accuracy, and connection reliability of the overall frame structure while meeting the vehicle lightweighting requirements.

[0035] Therefore, this crossbeam assembly and frame can meet the lightweight requirements of rail vehicles, and achieve the versatility of assembly, reliability and accuracy of connection between the crossbeam assembly and longitudinal beams of various materials, thereby improving the operational safety and stability of the bogie frame and even the entire bogie.

[0036] The present invention also provides a bogie equipped with the crossbeam assembly described above; or, equipped with the frame described above. By providing the crossbeam assembly or frame described above, the bogie possesses at least all the advantages of the crossbeam assembly described above, which will not be elaborated further here.

[0037] The present invention also provides a rail vehicle equipped with the crossbeam assembly described above; or, equipped with the frame described above; or, equipped with the bogie described above. By providing the crossbeam assembly, frame, or bogie described above, the bogie possesses at least all the advantages of the crossbeam assembly described above, the details of which will not be elaborated here.

[0038] Therefore, the above-mentioned bogie crossbeam composition, frame, bogie, and rail vehicle can all meet the overall vehicle lightweighting requirements (especially the bogie frame lightweighting requirements), while improving the connection strength, accuracy, and reliability of the bogie crossbeam and other corresponding connecting components in the frame, thereby greatly improving the operational safety and stability of the bogie frame and even the entire bogie. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in this invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a structural schematic diagram of the bogie provided by the present invention at the first angle.

[0041] Figure 2 This is a structural schematic diagram of the bogie provided by the present invention at the second angle.

[0042] Figure 3 This is a structural schematic diagram of the bogie frame provided by the present invention.

[0043] Figure 4 This is a cross-sectional view of the bogie frame provided by the present invention.

[0044] Figure 5 This is a schematic diagram of the crossbeam section of the bogie provided by the present invention.

[0045] Figure 6 This is a schematic diagram of the positioning connection structure provided by the present invention.

[0046] Figure 7 This is a structural schematic diagram of the connecting unit of the longitudinal beam provided by the present invention.

[0047] Figure label:

[0048] 100. Frame; 110. Crossbeam; 111. Center hole; 112. First cavity; 113. Second cavity; 114. Upper surface; 115. Side wall; 116. Lower surface; 117. Slope; 118. Reinforcing rib; 119. Lateral stop mounting position; 120. Longitudinal beam; 121. Leaf spring unit; 122. Connecting unit; 123. Positioning connection structure; 1231. Positioning part; 1232. Guide column; 130. Air spring mounting seat; 131. Motor connecting seat; 132. Positioning tie rod connecting seat; 133. Anti-hunting Vibration damping mounting base; 1331, First connecting part; 1332, Second connecting part; 134, Anti-roll vibration damping mounting base; 135, Lateral vibration damping mounting base; 136, Longitudinal tie rod connecting base; 137, Booster cylinder mounting base; 200, Wheelset assembly; 310, Drive motor; 320, Center pin assembly; 330, Air spring; 340, Anti-hunting vibration damper; 350, Anti-roll vertical vibration damper; 360, Lateral vibration damper; 370, Longitudinal traction tie rod; 380, Height valve assembly; 390, Booster cylinder assembly; 400, Base frame. Detailed Implementation

[0049] 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.

[0050] The following is combined Figures 1 to 7 The present invention describes in detail the crossbeam composition, frame 100, bogie, and rail vehicle provided in the embodiments of the present invention.

[0051] like Figure 1 and Figure 2 As shown, the bogie of this embodiment includes a frame 100 and a wheelset assembly 200. The frame 100 includes a crossbeam assembly and a pair of longitudinal beams 120. The crossbeam assembly is connected to the underframe 400 via a center pin assembly 320 to transmit power and load to the underframe 400. The pair of longitudinal beams 120 pass through corresponding cavities in the crossbeams 110 of the crossbeam assembly and are connected to the crossbeams 110. The specific connection structure will be described in detail later and will not be repeated here. The pair of longitudinal beams 120 are preferably made of carbon fiber leaf springs to achieve lightweighting and reliable transmission of longitudinal loads. The longitudinal beams 120 preferably include leaf spring units 121 composed of multiple layers of carbon fiber, and the two ends of the longitudinal beams 120 are higher than the middle part along the longitudinal direction of the bogie. The ends of the longitudinal beams 120 are respectively connected to the axles of the wheelset assembly 200 via primary springs of the primary suspension assembly to achieve the vibration damping effect of the primary suspension. The axle of the wheelset assembly 200 is connected to a primary suspension positioning rod on both sides along the lateral direction. The two primary suspension positioning rods are connected to the crossbeam 110 to realize the primary suspension positioning connection.

[0052] In some embodiments, such as in a train bogie, a drive mechanism is connected to the axle, preferably a drive motor 310. The drive motor 310 is fixed to the axle and connected to the crossbeam portion 110 of the frame 100 to transmit power and load.

[0053] It should be noted that all directions described in this invention are based on the direction of travel of the rail vehicle. "Front" and "rear" in this invention refer to the forward and backward direction of the vehicle's movement, i.e., the "longitudinal" direction, or the length direction of the vehicle or bogie. "Transverse" refers to the width direction of the vehicle or bogie. "Vertical" refers to the height direction of the vehicle or bogie. "Inner" refers to the direction inside the vehicle, i.e., the direction of the bogie's longitudinal centerline; similarly, "outer" refers to the direction outside the vehicle, i.e., the direction away from the bogie's longitudinal centerline. "Horizontal" refers to an arrangement along or parallel to the upper surface 114 of the crossbeam portion 110; in a stable driving state, "horizontal" is equivalent to a horizontal arrangement.

[0054] like Figure 3 , Figure 4 and Figure 5 As shown, the crossbeam assembly provided in this embodiment of the invention includes a crossbeam portion 110 formed by integrally molding a rectangular frame from carbon fiber. The crossbeam portion 110, integrally constructed from carbon fiber material, can significantly reduce the overall weight of the bogie, meeting the lightweight requirements of rail vehicles. Figure 5 As shown, the interior of the crossbeam 110 is divided into multiple cavities, thereby further reducing the material ratio of the structural components and achieving weight reduction. These cavities are channel structures extending longitudinally along the bogie. This channel structure, combined with the overall rectangular frame structure of the crossbeam 110, allows the crossbeam 110 to bear greater longitudinal and vertical loads while meeting lateral load requirements, thus improving the overall load-bearing capacity of the crossbeam 110.

[0055] Understandably, the one-piece molded carbon fiber crossbeam 110 can be manufactured using a manual laying and heated pressure molding process, resulting in good molding quality. Furthermore, because the crossbeam 110 is integrally molded, compared to the split-structure crossbeams described in the prior art, the one-piece molded carbon fiber crossbeam 110 of this embodiment eliminates the need for connecting fasteners between the original carbon fiber crossbeam and carbon fiber side beams, minimizing the number of connecting fasteners. Moreover, the structure described in this embodiment is more conducive to load transfer and maintenance.

[0056] In some embodiments, such as Figure 4 and Figure 5 As shown, the plurality of cavities includes a pair of first cavities 112. Within the cross-section of the beam portion 110, as... Figure 4As shown, a pair of first cavities 112 are symmetrically arranged on both sides of the crossbeam portion 110, so that a pair of longitudinal beam portions 120 of the bogie can pass through and be connected to the pair of first cavities 112. The first cavities 112 provide dedicated connection and protection areas for the longitudinal beam portions 120, so that most of the key structures in the frame 100 (such as traction components, shock absorber components, drive components, etc.) can be directly connected to the crossbeam portion 110, and the crossbeam assembly can be reliably replaced for various types of longitudinal beam portions 120. For example, the longitudinal beam portion 120 with the carbon fiber leaf spring structure described in the embodiment of the present invention can be installed in the frame 100, and it can also be adapted to the traditional box-type longitudinal beam structure described in the background art, thereby effectively improving the assembly versatility of the crossbeam assembly in different structures of the frame 100.

[0057] In some specific embodiments, such as Figure 5 As shown, adjacent cavities are separated by cavity walls. Each cavity wall is integrally formed with the upper and lower walls of the beam portion 110. This structural configuration enables the formation of a multi-cavity wall structure within the aforementioned rectangular frame, thereby further enhancing the lateral, longitudinal, and vertical load-bearing capacity of the beam portion 110.

[0058] In some embodiments, the plurality of cavities described above includes a central cavity, such as... Figure 4 and Figure 5 As shown. The central cavity is located in the middle of the crossbeam portion 110, that is, at the longitudinal axis position of the rectangular frame of the crossbeam portion 110. The central cavity is constructed with a central hole 111. The central hole 111 extends through the upper surface 114 and the lower surface 116 of the crossbeam portion 110. The central hole 111 is used for positioning and installing the center pin assembly 320. Preferably, the center hole 111 is constructed as a square-round hole to fit the outer contour of the center pin assembly 320 and to facilitate carbon fiber manufacturing. The specific connection structure between the center pin assembly 320 and the crossbeam portion 110 will be described in detail later and will not be repeated here.

[0059] In some specific embodiments, such as Figure 3 and Figure 4 As shown, the middle of the inner sidewall of the central cavity has transverse stop mounting positions 119. The transverse stop mounting positions 119 are used to install transverse stops. A pair of transverse stops are symmetrically installed along the longitudinal centerline of the crossbeam and fixed to the sidewalls on both sides of the transverse direction of the central cavity. The pair of transverse stops face each other toward the center pin assembly, thereby providing a transverse stop function between the crossbeam and the center pin assembly.

[0060] In some embodiments, the aforementioned plurality of cavities further includes a pair of first cavities 112 and a pair of second cavities 113. The pair of first cavities 112 are symmetrically constructed on both sides of the central cavity, through which a pair of longitudinal beams 120 pass and connect. The pair of second cavities 113 are symmetrically constructed on both sides of the central cavity, with the pair of first cavities 112 located between the pair of second cavities 113. The second cavities 113 are located outside the first cavities 112, providing protection for the first cavities 112 and the longitudinal beams 120 passing through them. During vehicle operation, they can bear more lateral load vibrations for the first cavities 112, and balance and improve the bearing of longitudinal and vertical loads. The symmetrical structure of the pair of first cavities 112 and the pair of second cavities 113 ensures that the crossbeam 110 is symmetrical laterally, avoiding the height difference problem caused by the bogie spring components rolling with the vehicle, making the bogie posture more balanced during vehicle operation, and improving vehicle stability and safety. Furthermore, the second cavity 113 is located outside the first cavity 112, which makes the connection between the crossbeam portion 110 and the various vibration damping connection components described in the embodiments of the present invention more convenient and reliable, and widens the overall width of the crossbeam portion 110, thereby better adapting to the overall assembly of the bogie and making the space utilization rate higher.

[0061] In some embodiments, such as Figure 5 As shown, the multiple cavities also include a pair of spacer cavities. The pair of spacer cavities are symmetrically constructed on both sides of the central cavity, and are located between a pair of first cavities 112. That is, each spacer cavity is formed between the corresponding first cavity 112 and the central cavity. The spacer cavities allow for the addition of a reinforcing structure between the central cavity and the first cavities 112; for example, each spacer cavity may contain a reinforcing rib 118, thereby improving the overall load-bearing capacity of the crossbeam portion 110 and separating the central pin assembly 320 from the longitudinal beam portions 120 on both sides, thus improving vibration damping.

[0062] In some specific embodiments, such as Figure 4 and Figure 5 As shown, the preferred reinforcing rib 118 is a cavity wall structure placed flat within the spacer cavity. Understandably, the reinforcing rib 118 can also be obliquely arranged within the spacer cavity, using a triangle to reinforce the cavity structure.

[0063] In some embodiments, such as Figure 4 As shown, the crossbeam assembly also includes two sets of traction connection components. The two sets of traction connection components are respectively installed on the crossbeam section 110 and are symmetrically arranged at both ends of the crossbeam section 110 with the axis of the central hole 111 as the axis of symmetry, so as to ensure the overall structure, load transmission and traction balance of the crossbeam assembly.

[0064] In some embodiments, such as Figures 1 to 4As shown, each traction connection assembly includes a motor connector 131, a longitudinal tie rod connector 136, and a pair of positioning tie rod connectors 132. The motor connector 131, the longitudinal tie rod connector 136, and the pair of positioning tie rod connectors 132 are all connected to the lower surface 116 of the crossbeam portion 110 and are located at the ends of the crossbeam portion 110 facing the wheelset assembly 200, that is, at the front and rear ends of the crossbeam portion 110.

[0065] In some specific embodiments, such as Figure 1 and Figure 2 As shown, a pair of positioning tie rod connecting seats 132 are respectively connected to the lateral sides of the lower surface 116 of the crossbeam portion 110, and U-shaped connecting seats extend forward or backward from the crossbeam portion 110 to connect with the nodes of a series of positioning tie rods at the corresponding positions.

[0066] In some specific embodiments, such as Figure 2 As shown, in the two sets of traction connection assemblies described above, a pair of longitudinal tie rod connecting seats 136 are diagonally symmetrically connected to both ends of the crossbeam portion 110 about the axis of symmetry of the central hole 111. That is, as in this embodiment... Figure 2 As shown, one of a pair of longitudinal tie rod connectors 136 is fixed to the front end on one side of the longitudinal centerline of the crossbeam portion 110, and the other is fixed to the rear end on the other side of the longitudinal centerline of the crossbeam portion 110. The reverse is also possible. This structural arrangement ensures that each longitudinal tie rod connector 136 can reliably connect to a node at one end of a corresponding longitudinal traction tie rod 370, the other end of which is connected to the bottom of the center pin assembly 320, thus achieving reliable longitudinal traction between the crossbeam portion 110 and the center pin assembly 320.

[0067] In some specific embodiments, such as Figure 4 and Figure 5 As shown, the longitudinal tie rod connector 136 is connected to one side of the motor connector 131 and is integrally formed with the motor connector 131. This structure can reliably improve the load-bearing capacity of the motor connector 131 and the longitudinal tie rod connector 136, enabling the motor connector 131 to withstand and resist a wider range of vibrations from the drive motor 310, thus improving the connection reliability with the drive motor 310; furthermore, it can improve the connection reliability between the longitudinal tie rod connector 136 and the longitudinal traction tie rod 370, thereby increasing the load-bearing capacity of the longitudinal traction load.

[0068] In some specific embodiments, such as Figure 4 and Figure 5As shown, among the aforementioned cavities, the height of the middle cavity is less than the height of the first cavity 112, so that the lower surface 116 of the crossbeam portion 110 forms an upwardly recessed groove structure at the position of the middle cavity, and the motor connection portion is connected to the groove structure. The motor connection portion is provided with a longitudinally penetrating connection hole. This structural design ensures reliable alignment between the connection hole and the connecting shaft of the drive motor 310, and uses a longitudinal shaft connection structure to replace the original hanging, node, or bolt connection structure, so that the motor connection portion only bears the longitudinal load and does not have to bear the shear force, thereby improving the connection reliability between the drive motor 310 and the crossbeam portion 110, reducing vibration and noise, and lowering the risk of vehicle operation.

[0069] In some specific embodiments, such as Figure 4 and Figure 5 As shown, in order to reasonably arrange the load intensity distribution of the lower surface 116 of the crossbeam 110 and to reliably align the connecting hole with the connecting shaft of the drive motor 310, it is preferable that the lower surface 116 of each spaced cavity is constructed as a ramp 117 so that the lower wall of the first cavity 112 and the lower wall of the middle cavity can smoothly transition, and the ramp 117 can be used to improve the overall load capacity of the crossbeam 110.

[0070] In some embodiments, such as Figure 1 and Figure 2 As shown, the crossbeam assembly also includes a pair of vibration damping connection components. The pair of vibration damping connection components includes an anti-hunting vibration damping mounting base 133 and an anti-roll vibration damping mounting base 134. The anti-hunting vibration damping mounting base 133 and the anti-roll vibration damping mounting base 134 are symmetrically connected to the side wall 115 of the crossbeam portion 110 with the longitudinal centerline of the central cavity as the axis of symmetry. The anti-roll vibration damping mounting base 134, located on the same side, is positioned at the front end of the anti-hunting vibration damping mounting base 133. The anti-hunting vibration damping mounting base 133 is connected to the underframe 400 via an anti-hunting damper 340. Specifically, the anti-hunting damper 340 is connected longitudinally along the bogie between the anti-hunting vibration damping mounting base 133 and the downwardly extending mounting bracket of the underframe 400, thereby achieving the anti-hunting vibration damping effect of the bogie. The anti-roll damping mounting base 134 is connected to the underframe 400 through the anti-roll vertical damper 350. The anti-roll vertical damper 350 is a damper with a vertically arranged hydraulic cylinder structure, which replaces the traditional anti-roll torsion bar and is directly connected between the anti-roll damping mounting base 134 and the underframe 400, thereby realizing the anti-roll function of the bogie.

[0071] In some specific embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, the anti-hunting vibration damping mounting base 133 includes a first connecting portion 1331 and a second connecting portion 1332 that are connected internally and externally. The first connecting portion 1331 is L-shaped and fixed to the side wall 115 and lower surface 116 of the crossbeam portion 110, as shown in the reference. Figure 4 As shown. The first connecting portion 1331 has several protrusions on its vertical surface. These thickened protrusions enhance the connection strength with the second connecting portion 1332. (Refer to...) Figure 4 As shown. The second connecting part 1332 includes a connected base and a U-shaped seat. The base is fixed to the protrusion of the first connecting part 1331, and the U-shaped seat is flatly connected to the base so as to reliably connect with the end node of the flat anti-hunting damper 340. (Refer to...) Figure 1 As shown.

[0072] In some specific embodiments, such as Figures 1 to 4 As shown, the anti-roll damping mounting base 134 is connected in a Z-shape to the upper surface 114 and side wall 115 of the crossbeam portion 110. A connecting member is provided on the platform extending outward from the bottom of the anti-roll damping mounting base 134, thereby achieving a reliable connection with the end node of the vertically arranged anti-roll vertical damper 350.

[0073] In some embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, the aforementioned pair of vibration damping connection components also includes a pair of lateral vibration damping mounting seats 135. The pair of lateral vibration damping mounting seats 135 are respectively connected to the upper part of the center pin assembly 320 via lateral vibration dampers 360 arranged laterally, thereby providing lateral vibration damping between the beam portion 110 and the center pin assembly 320. The pair of lateral vibration damping mounting seats 135 are connected to the upper surface 114 of the beam portion 110 and are diagonally symmetrically arranged about the axis of the center hole 111 as an axis of symmetry. That is, as in this embodiment... Figure 1 and Figure 3 As shown, one of the pair of lateral damping mounting brackets 135 is fixed to the front end on one side of the longitudinal centerline of the crossbeam portion 110, and the other is fixed to the rear end on the other side of the longitudinal centerline of the crossbeam portion 110. The reverse is also possible. This structural arrangement ensures that the pair of lateral dampers 360 can be diagonally symmetrically arranged about the axis of the center hole 111, and that each lateral damper 360 remains laterally positioned along the bogie, improving the front-to-back balance and left-to-right symmetry of the lateral damping.

[0074] In some specific embodiments, such as Figure 3 As shown, the two arms of the U-shaped connecting seat of the transverse vibration damping mounting base 135 are arranged longitudinally, thereby ensuring that the connection position of the U-shaped connecting seat is set in the transverse direction, thus ensuring reliable connection with the end node of the transverse vibration damper 360, and ensuring the accurate position of the transverse vibration damper 360.

[0075] In some embodiments, such as Figure 1 and Figure 2As shown, the crossbeam assembly also includes a pair of height valve assemblies 380. The pair of height valve assemblies 380 are symmetrically connected to the ends of the side walls 115 of the crossbeam portion 110, with the longitudinal centerline of the central cavity as the axis of symmetry. The height valve assemblies 380 are used to measure the real-time height of the air spring 330, thereby dynamically sensing changes in vehicle height.

[0076] In some specific embodiments, such as Figure 1 As shown, the height valve assembly 380 includes a linkage mechanism and a height valve unit. One end of the linkage mechanism passes through the second cavity 113 and is fixedly connected to the anti-roll damping mounting seat 134 on the corresponding side via the side wall 115 of the crossbeam portion 110, thereby increasing the installation reliability of the height valve assembly 380. The height valve unit is connected to the other end of the linkage mechanism and is located in front of the crossbeam portion 110. This allows for reasonable clearance of the mounting frame extending downward from the base frame 400 behind the frame 100, thus providing space for the installation of the anti-hunting damper 340.

[0077] In some embodiments, such as Figure 2 and Figure 4 As shown, the crossbeam assembly also includes a pair of booster cylinder mounting seats 137. The booster cylinder mounting seats 137 are used to mount the booster cylinders in the hydraulic braking assembly. The pair of booster cylinder mounting seats 137 are mounted on the lower surface 116 of the crossbeam portion 110 and are symmetrically arranged on both sides of the crossbeam portion 110 about the axis of the central hole 111. This provides sufficient mounting space on the lower surface 116 of the crossbeam portion 110 for mounting the longitudinal traction rod 370.

[0078] like Figure 3 and Figure 4 As shown, the frame 100 provided in this embodiment of the invention includes the crossbeam composition described above and a pair of longitudinal beam portions 120. The structure of the pair of longitudinal beam portions 120 is preferably the carbon fiber leaf spring structure described above, but it can also be a conventional box-type longitudinal beam. If the longitudinal beam portion 120 is a conventional box-type longitudinal beam, then the size of the first cavity 112 needs to be adaptively adjusted according to the outer contour of the longitudinal beam portion 120.

[0079] In some embodiments, taking the pair of longitudinal beams 120 as an example, which are the aforementioned carbon fiber leaf spring structures, such as... Figure 3 and Figure 4As shown, a pair of longitudinal beams 120 pass through a pair of first cavities 112 formed by the aforementioned crossbeams along the longitudinal direction of the bogie. By setting the aforementioned crossbeam composition, the frame 100 possesses at least all the advantages of the aforementioned crossbeam composition, and the repetitions will not be repeated here. On this basis, since the longitudinal beams 120 of the frame 100 can pass through the first crossbeams, a reliable connection between the crossbeams 110 and the longitudinal beams 120 in the entire carbon fiber frame 100 is achieved, thereby improving the connection strength between the longitudinal beams 120 and the secondary suspension assembly, and further improving the load-bearing capacity, positioning accuracy, and connection reliability of the overall structure of the frame 100 while meeting the vehicle lightweighting requirements.

[0080] Therefore, the crossbeam assembly and frame 100 can achieve the assembly versatility, connection reliability and accuracy of the crossbeam assembly and longitudinal beams of various materials while meeting the requirements of lightweight rail vehicles, thereby improving the operational safety and stability of the bogie frame 100 and even the entire bogie.

[0081] In some embodiments, such as Figure 1 As shown, the bogie frame 100 also includes a secondary suspension system. The secondary suspension system includes a pair of air springs 330. A pair of air spring mounting seats 130 are fixedly connected to the upper walls of a pair of first cavities 112, and the pair of air springs 330 are respectively fixed to the pair of air spring mounting seats 130. Each first cavity 112 is provided with a positioning connection structure 123, and each longitudinal beam 120 is connected to the corresponding side of the air spring 330 through the positioning connection structure 123. This positioning connection structure 123 can achieve reliable positioning and installation with the longitudinal beam 120, replacing the original carbon fiber leaf spring structure where the longitudinal beam 120 required separate casting and machining of guide columns. In comparison, the separate fabrication of the longitudinal beam 120, crossbeam 110, air springs 330, and positioning connection structure 123 described in this embodiment can greatly simplify the manufacturing process while maintaining the original frame 100's assembly accuracy and load-bearing capacity, making it more conducive to streamlined production.

[0082] In some specific embodiments, a recessed positioning hole is formed at the center of the lower surface 116 of the air spring 330. For example... Figure 6 As shown, the positioning connection structure 123 includes a positioning part 1231 and a guide post 1232. The guide post 1232 is connected to the upper surface 114 of the positioning part 1231. The guide post 1232 can pass through the upper wall of the first cavity 112 and be inserted into the positioning hole of the air spring 330, thereby achieving precise positioning between the positioning connection structure 123 and the air spring 330. The lower surface 116 of the positioning part 1231 is provided with a positioning boss. The longitudinal beam part 120 includes a leaf spring unit 121 and a connecting unit 122. The leaf spring unit 121 is arranged along the longitudinal direction of the bogie. Figure 7The structure of the connecting unit 122 mounted on the longitudinal beam portion 120 is shown. This connecting unit 122 is fitted to the center of the upper surface 114 of the leaf spring unit 121. Furthermore, the upper surface 114 of the connecting unit 122 is provided with a positioning groove. In this structural arrangement, by engaging and fixing the positioning boss with the positioning groove, the positioning installation between the connecting unit 122 of the longitudinal beam portion 120 and the positioning part 1231 of the positioning connecting structure 123 can be achieved, thereby realizing precise positioning and reliable assembly between the positioning connecting structure 123 and the longitudinal beam portion 120.

[0083] In some specific embodiments, the positioning bosses and positioning grooves are preferably configured in a cross shape or a star shape. Other structures capable of achieving both lateral and longitudinal positioning can also be selected. For example... Figure 6 and Figure 7 As shown, the positioning boss in this embodiment is cross-shaped.

[0084] like Figure 1 and Figure 2 As shown, the bogie of this embodiment of the invention is equipped with the crossbeam assembly as described above. Alternatively, the bogie of this embodiment of the invention is equipped with the frame 100 as described above. By providing the crossbeam assembly or frame 100 described above, the bogie possesses at least all the advantages of the crossbeam assembly or frame 100 described above, which will not be elaborated further here.

[0085] The rail vehicle provided in this embodiment of the invention is equipped with the crossbeam assembly as described above. Alternatively, the rail vehicle provided in this embodiment of the invention is equipped with the frame 100 as described above. Alternatively, the rail vehicle provided in this embodiment of the invention is equipped with the bogie as described above. By setting the crossbeam assembly, frame 100, or bogie as described above, the bogie possesses at least all the advantages of the crossbeam assembly, frame 100, or bogie described above, which will not be elaborated further here.

[0086] Finally, it should be noted that the structural configuration of the crossbeam and crossbeam assembly in the above specific embodiments is the optimal embodiment obtained based on mechanical topology optimization and analysis. The above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit it. 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 bogie crossbeam assembly, characterized in that, It includes a crossbeam section with a rectangular frame integrally formed from carbon fiber, the interior of which is divided into multiple cavities, and the multiple cavities are channel structures extending longitudinally along the bogie; The plurality of cavities include a pair of first cavities. Within the cross section of the crossbeam portion, the pair of first cavities are symmetrically arranged on both sides of the transverse side of the crossbeam portion, so that the pair of longitudinal beam portions of the bogie can pass through and be connected to the pair of first cavities respectively. The plurality of cavities include: A central cavity is located in the middle of the crossbeam portion. The central cavity has a central hole that extends through the upper and lower surfaces of the crossbeam portion. The central hole is used to position and install the central pin assembly. A pair of first cavities are symmetrically constructed on both sides of the central cavity; A pair of second cavities are symmetrically constructed on both sides of the central cavity, and a pair of first cavities are located between the pair of second cavities; The crossbeam assembly also includes two sets of traction connection components. The two sets of traction connection components are respectively installed on the crossbeam and are symmetrically arranged at both ends of the longitudinal direction of the crossbeam with the axis of the central hole as the axis of symmetry. Each of the aforementioned traction connection assemblies includes a longitudinal tie rod connector, which is connected to the lower surface of the crossbeam and located at the end of the crossbeam facing the wheelset assembly.

2. The crossbeam assembly of the bogie according to claim 1, characterized in that, Each of the aforementioned traction connection assemblies includes a motor connection seat and a pair of positioning tie rod connection seats. The motor connection seat and the pair of positioning tie rod connection seats are both connected to the lower surface of the crossbeam and located at the end of the crossbeam facing the wheelset assembly. The longitudinal tie rod connecting seat is connected to one side of the motor connecting seat and is integrally formed with the motor connecting seat.

3. The crossbeam assembly of the bogie according to claim 2, characterized in that, The height of the central cavity is less than the height of the first cavity, so that the lower surface of the crossbeam forms an upwardly recessed groove structure at the position of the central cavity, and the motor connector is connected to the groove structure; the motor connector is provided with a longitudinally penetrating connecting hole.

4. The crossbeam assembly of the bogie according to claim 1, characterized in that, The crossbeam assembly also includes a pair of vibration damping connection components; The pair of vibration damping connection components includes an anti-hunting vibration damping mounting base, an anti-roll vibration damping mounting base, and a pair of lateral vibration damping mounting bases; Among them, a pair of anti-hunting vibration damping mounting seats and a pair of anti-roll vibration damping mounting seats are symmetrically connected to the side wall of the crossbeam with the longitudinal centerline of the central cavity as the axis of symmetry, and the anti-roll vibration damping mounting seats located on the same side are disposed at the front end of the anti-hunting vibration damping mounting seats; Among them, a pair of transverse vibration damping mounting seats are connected to the upper surface of the crossbeam and are arranged diagonally symmetrically with the axis of the central hole as the axis of symmetry.

5. The crossbeam assembly of the bogie according to claim 4, characterized in that, The anti-hunting vibration damping mounting base includes: The first connecting part is L-shaped and fixed to the side wall and lower surface of the crossbeam. The vertical surface of the first connecting part has several protrusions. The second connecting part includes a connected base and a U-shaped seat. The base is fixed to the protrusion of the first connecting part, and the U-shaped seat is flatly connected to the base.

6. The crossbeam assembly of the bogie according to claim 4, characterized in that, The crossbeam assembly also includes a pair of height valve assemblies, which are symmetrically connected to the side wall ends of the crossbeam with the longitudinal centerline of the central cavity as the axis of symmetry. The height valve assembly includes: The linkage mechanism has one end inserted into the second cavity and is fixedly connected to the anti-roll vibration damping mounting seat on the corresponding side through the side wall of the crossbeam. A height valve unit is connected to the other end of the linkage mechanism, and the height valve unit is located in front of the crossbeam.

7. The crossbeam assembly of the bogie according to claim 1, characterized in that, The crossbeam assembly also includes a pair of booster cylinder mounting seats, which are installed on the lower surface of the crossbeam and symmetrically arranged on both sides of the crossbeam with the axis of the central hole as the axis of symmetry.

8. The crossbeam assembly of the bogie according to any one of claims 1-7, characterized in that, The plurality of cavities further include: A pair of spaced cavities are symmetrically constructed on both sides of the central cavity, and the pair of spaced cavities are located between a pair of first cavities; Each of the spacer cavities is equipped with reinforcing ribs; The lower surface of each of the spacer cavities is constructed as a ramp.

9. A bogie frame, characterized in that, include: The bogie is composed of a crossbeam as described in any one of claims 1-8; A pair of longitudinal beams pass through a pair of first cavities formed by the crossbeams along the longitudinal direction of the bogie.

10. The bogie frame according to claim 9, characterized in that, The bogie frame also includes a secondary suspension assembly, which includes a pair of air springs. A pair of air spring mounting seats are fixedly connected to the upper wall of the first cavity, and the pair of air springs are respectively fixedly mounted on the pair of air spring mounting seats. Each of the first cavities is provided with a positioning connection structure, and each of the longitudinal beams is connected to the air spring on the corresponding side through the positioning connection structure.

11. The bogie frame according to claim 10, characterized in that, The lower surface of the air spring has a recessed positioning hole at its center; the positioning connection structure includes a positioning part and a guide post, the guide post is connected to the upper surface of the positioning part, and the guide post can pass through the upper wall of the first cavity and be inserted into the positioning hole of the air spring. The lower surface of the positioning part is provided with a positioning boss. The longitudinal beam part includes a leaf spring unit and a connecting unit. The leaf spring unit is arranged along the longitudinal direction of the bogie. The connecting unit is assembled in the middle of the upper surface of the leaf spring unit. The upper surface of the connecting unit is provided with a positioning groove. The positioning boss and the positioning groove are engaged and fixed to achieve the positioning and installation between the connecting unit of the longitudinal beam part and the positioning part of the positioning connection structure.

12. The bogie frame according to claim 11, characterized in that, The positioning boss and the positioning groove are configured in a cross shape or a star shape.

13. A bogie, characterized in that, The bogie is assembled with a crossbeam as described in any one of claims 1-8; or, the bogie is assembled with a frame as described in any one of claims 9-12.

14. A rail vehicle, characterized in that, The bogie is equipped with a crossbeam assembly as described in any one of claims 1-8; or, a bogie frame as described in any one of claims 9-12; or, a bogie as described in claim 13.

Images