An articulated frame of a bogie for a rail vehicle, a bogie and a train

Abstract

The present invention relates to an articulated frame of a railway vehicle bogie, which comprises a left side beam, a right side beam arranged longitudinally, and an articulated cross beam device arranged transversely. The articulated cross beam device includes an outer sleeve and an inner sleeve. The inner sleeve extends into the outer sleeve, and the outer sleeve and the inner sleeve are connected by a left bearing and a right bearing. The left side beam and the right side beam can freely twist relative to each other through the left bearing and the right bearing. The present invention belongs to an H-type integral frame. Relying on the articulated cross beam device, the articulated frame can bear forces in three directions and torques in two directions, and only releases the degree of freedom of rotation around the transverse direction, so that the bogie has good load sharing performance, high stability, high safety when passing through curves, and strong ability to adapt to line distortion. Therefore, the bogie can increase the running speed on various lines. The articulated cross beam device is connected by bolt fasteners exposed outside, and the disassembly and assembly process is simple, which is convenient for maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of bogies, in particular to an articulated frame of a railway vehicle bogie, a bogie and a train. Background Art

[0002] Existing railway bogies are mainly three-piece bogies and integral frame bogies. The three-piece bogies have a strong ability to adapt to track twists, but their structures are loose, the anti-rhombic stiffness is small, and the running speed is low. While the integral frame bogies have a small rhombic deformation, but their ability to adapt to track twists is poor, and they need to rely on the soft primary vertical deformation to adapt to track twists, which has high requirements for the primary suspension and the track.

[0003] Some existing flexible integral frames can reduce the torsional stiffness between two side beams, which is mainly achieved through rubber joints or thin steel plate crossbeams. For the flexible frames using rubber joints, the rubber joints bear large torques, and the two side beams of the flexible frames using rubber joints can only rotate a certain angle and cannot achieve free torsion between the two side beams; for the frames with flexibility achieved by using thin steel plates for the crossbeams, the rotation angle between the two side beams is limited and free torsion cannot be achieved either. For the bogies where the two side beams cannot rotate freely, the line adaptability and curve passing ability are limited. Summary of the Invention

[0004] The purpose of the present invention is to provide an articulated frame of a railway vehicle bogie, a bogie and a train for the problem that some existing flexible integral frames cannot achieve free torsion between two side beams in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present invention provides an articulated frame of a railway vehicle bogie, including a left side beam, a right side beam arranged longitudinally and an articulated crossbeam device arranged transversely. The left side beam, the right side beam and the articulated crossbeam device form an H-shaped integral frame. The articulated crossbeam device includes an outer sleeve and an inner sleeve. The inner sleeve extends into the outer sleeve. The outer sleeve and the inner sleeve are connected by a left bearing and a right bearing. There is a span between the left bearing and the right bearing. The left side beam and the right side beam can achieve free torsion with each other through the left bearing and the right bearing.

[0007] As a preferred technical solution of the present invention, both ends of the left side beam and the right side beam are connected to a wheel set through a primary suspension device.

[0008] As a further preferred technical solution of the present invention, both ends of the left side beam and the right side beam are respectively provided with primary spring mounting seat holes.

[0009] As a preferred technical solution of the present invention, transition members are respectively provided on the left beam and the right beam, and the articulated crossbeam device is connected to the transition members through a flange structure.

[0010] As a further preferred technical solution of the present invention, the transition member is in a circular ring shape, and is connected to the left beam or the right beam by welding on the inner side, and is connected to the articulated crossbeam device by bolt fasteners on the outer side.

[0011] As a preferred technical solution of the present invention, the articulated crossbeam device further includes a left positioning sleeve, a middle positioning sleeve, a right positioning sleeve, a left bearing positioning end cover and a right bearing positioning end cover. The left positioning sleeve, the middle positioning sleeve and the right positioning sleeve are sequentially sleeved outside the inner sleeve. The left bearing positioning end cover and the right bearing positioning end cover are respectively connected to the flanges at both ends of the outer sleeve. A left bearing is arranged between the left bearing positioning end cover and the left positioning sleeve, and a right bearing is arranged between the right bearing positioning end cover and the right positioning sleeve.

[0012] As a further preferred technical solution of the present invention, the middle positioning sleeve is installed on the inner sleeve by an interference fit connection method.

[0013] As a further preferred technical solution of the present invention, both ends of the outer sleeve are in a flange shape, and through holes for bolt connectors are evenly arranged on the flanges. The transition between the flange and the outer cylindrical surface of the long straight section of the outer sleeve is realized by a fillet with a larger radius. The left end flange of the outer sleeve is connected to the left bearing positioning end cover, and the right end flange is connected to the right bearing positioning end cover. A traction pull rod and a transverse stop mounting seat are connected to the outer surface of the long straight section of the outer sleeve.

[0014] As a further preferred technical solution of the present invention, the left bearing positioning end cover includes an upper end cover and a lower end cover. The left bearing positioning end cover adopts a split structure, which is beneficial to the disassembly and assembly of the articulated frame.

[0015] As a further preferred technical solution of the present invention, the inner sleeve adopts a variable cross-section design. Its outer surface includes five cylindrical surfaces with different diameters and a conical surface. Unloading grooves are provided between adjacent cylindrical surfaces with different diameters. Among them, the four unloading grooves at both ends of the left bearing and the right bearing are relatively shallow, and the two unloading grooves at both ends of the middle positioning sleeve are relatively deep. One end of the inner sleeve is a flange, and the transition between the flange and the outer cylindrical surface of the long straight section of the inner sleeve is realized by an inclined straight section and a fillet. The other end of the inner sleeve is the conical surface.

[0016] As a preferred technical solution of the present invention, the left bearing and the right bearing are steel sliding bearings, and the left bearing and the right bearing have the same outer diameter and different inner diameters. Among them, the inner diameter of the left bearing is slightly larger than that of the right bearing, which conforms to the bearing installation sequence.

[0017] As a preferred technical solution of the present invention, both the left side beam and the right side beam are of single web structure. On both sides of the single web of the left side beam and the right side beam, there is a set of stiffening plates welded at important structures. A set of box-shaped outrigger beams are respectively connected to the outside of the left side beam and the right side beam. The outrigger beam is located at the longitudinal center of the left side beam and the right side beam. An anti-roll torsion bar mounting sleeve is connected to the outside of the outrigger beam, and an anti-hunting damper mounting seat is connected to the outer cylindrical surface of the anti-roll torsion bar mounting sleeve.

[0018] As a preferred technical solution of the present invention, the left side beam and the right side beam are provided with secondary air spring mounting seat holes, brake device mounting seats, secondary lateral damper mounting seats, and primary longitudinal tie rod mounting seats.

[0019] In a second aspect, the present invention also provides a bogie, including the articulated frame of the railway vehicle bogie as described in any one of the above.

[0020] In a third aspect, the present invention also provides a train, including at least one bogie as described above.

[0021] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0022] 1. The articulated frame of the present invention belongs to an H-shaped integral frame, which is a stable overall structure. Relying on the articulated crossbeam device, the articulated frame can withstand forces in three directions and torques in two directions, that is, it can balance forces in three directions and torques in two directions, and only release the degree of freedom of rotation around the transverse axis, making the bogie have good load sharing performance, high stability, high safety when passing through curves, and strong ability to adapt to line twists, so that the bogie can increase the running speed on various lines.

[0023] 2. The bogie using the articulated frame of the present invention has a relatively small torsional stiffness, and can simultaneously have excellent running stability and curve passing performance, fundamentally solving the contradiction between the running stability and curve passing performance of traditional bogies.

[0024] 3. By using the articulated frame of the present invention, the two side beams of the articulated frame can easily generate relative torsional movement around the transverse axis, greatly enhancing the ability of the corresponding bogie to adapt to line unevenness. The bogie can adopt a simple axle box suspension structure, thereby reducing the production and maintenance costs of the bogie. If the bogie adopts a better-performing axle box suspension, the bogie can run at a higher speed and have better running smoothness.

[0025] 4. When using the articulated frame of the present invention, the articulated crossbeam device is connected to the transition parts on the left beam and the right beam through bolt fasteners, and the flanges of the articulated crossbeam device are connected by bolt fasteners, and the bolt connectors are all exposed outside. The disassembly and assembly process is simple, which is convenient for maintenance, and it avoids the adverse impact on the bearings caused by the welded connection method during the installation process of the articulated crossbeam device.

[0026] 5. The articulated frame of the present invention is easy to match bogies of different projects, thus reducing the R & D cost of bogies. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the articulated frame of the railway vehicle bogie;

[0028] Figure 2 It is a cross-sectional view of the articulated frame of the railway vehicle bogie;

[0029] Figure 3 It is a cross-sectional view of the articulated crossbeam device;

[0030] Figure 4 It is an exploded view of the articulated crossbeam device;

[0031] Figure 5 It is a structural schematic diagram of the left bearing positioning end cover.

[0032] Markings in the figure: 1 - left beam, 2 - right beam, 3 - primary spring mounting seat hole, 4 - anti-roll torsion bar mounting sleeve, 5 - anti-hunting damper mounting seat, 6 - outrigger beam, 7 - secondary air spring mounting seat hole, 8 - transition part, 9 - articulated crossbeam device, 91 - inner sleeve, 92 - left bearing positioning end cover, 921 - upper end cover, 922 - lower end cover, 93 - left bearing, 94 - outer sleeve, 95 - left positioning sleeve, 96 - middle positioning sleeve, 97 - right positioning sleeve, 98 - right bearing, 99 - right bearing positioning end cover, 10 - brake device mounting seat, 11 - traction link and lateral stop mounting seat, 12 - primary longitudinal tie rod mounting seat, 13 - secondary lateral damper mounting seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present invention will be described in detail below with reference to the drawings.

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] Embodiment 1

[0036] As Figures 1 to 5As shown in the figure, an articulated frame of a railway vehicle bogie according to the present invention includes a left beam 1 and a right beam 2 arranged longitudinally and an articulated crossbeam device 9 arranged transversely.

[0037] As Figure 1 shown in the figure, the left beam 1, the right beam 2 and the articulated crossbeam device 9 form an H-shaped integral frame. The middle parts of the left beam 1 and the right beam 2 respectively have concave segments, and both ends of the articulated crossbeam device 9 are connected to the concave segments.

[0038] As Figure 1 and Figure 2 shown in the figure, transition pieces 8 are respectively arranged at the concave segments of the left beam 1 and the right beam 2. The transition pieces 8 are circular rings. The inner sides are connected to the left beam 1 or the right beam 2 by welding. The articulated crossbeam device 9 is integrally cylindrical. Both ends of the articulated crossbeam device 9 are flange structures. The outer sides of the transition pieces 8 are connected to the articulated crossbeam device 9 by bolt fasteners. When an anti-roll torsion bar needs to be installed on the bogie, the anti-roll torsion bar can penetrate through the transition pieces 8 and the central circular holes of the articulated crossbeam device 9. The ends of the inner sleeve 91, the outer sleeve 94 and the transition pieces 8 are all provided with the same flange, so that the left beam 1 and the right beam 2 of the articulated frame are interchangeable, reducing the R & D and production costs of the bogie. The flanges of the articulated crossbeam device 9 are connected by bolt fasteners, and the bolt connectors are all exposed outside. The disassembly and assembly process is simple and convenient for maintenance, avoiding the adverse effects on the bearings caused by the use of welding connection during the installation of the articulated crossbeam device 9.

[0039] As Figures 2 to 4 shown in the figure, the articulated crossbeam device 9 includes an inner sleeve 91, a left bearing positioning end cover 92, a left bearing 93, an outer sleeve 94, a left positioning sleeve 95, a middle positioning sleeve 96, a right positioning sleeve 97, a right bearing 98 and a right bearing positioning end cover 99. The left positioning sleeve 95, the middle positioning sleeve 96, the right positioning sleeve 97, the left bearing positioning end cover 92 and the right bearing positioning end cover 99 are five positioning parts.

[0040] As Figures 2 to 4As shown, the inner sleeve 91 extends into the outer sleeve 94. The left bearing 93 and the right bearing 98 are steel sliding bearings, which are sleeved on the inner sleeve 91. The left bearing 93 and the right bearing 98 have the same outer diameter but different inner diameters. Among them, the inner diameter of the left bearing 93 is slightly larger than that of the right bearing 98, which conforms to the bearing installation sequence. The outer sleeve 94 and the inner sleeve 91 are connected by the left bearing 93 and the right bearing 98. There is a certain span between the left bearing 93 and the right bearing 98. The left side beam 1 and the right side beam 2 can twist freely relative to each other through the left bearing 93 and the right bearing 98, and the torsional stiffness between the left side beam 1 and the right side beam 2 is small, and they can perform free nodding and twisting movements.

[0041] As Figures 2 to 4 shown, the left positioning sleeve 95, the middle positioning sleeve 96, and the right positioning sleeve 97 are sequentially sleeved on the outer surface of the inner sleeve 91. The middle positioning sleeve 96 is installed on the inner sleeve 91 by an interference fit connection method. The left bearing positioning end cover 92 and the right bearing positioning end cover 99 are respectively connected to the flanges at both ends of the outer sleeve 94. The left bearing 93 is arranged between the left bearing positioning end cover 92 and the left positioning sleeve 95, and the right bearing 98 is arranged between the right bearing positioning end cover 99 and the right positioning sleeve 97.

[0042] As Figures 2 to 4 shown, both ends of the outer sleeve 94 are in flange shape, and through holes for bolt connectors are evenly arranged on the flanges. The transition between the flange and the outer cylindrical surface of the long straight section of the outer sleeve 94 is realized through a fillet with a larger radius. The left end flange of the outer sleeve 94 is connected to the left bearing positioning end cover 92, and the right end flange is connected to the right bearing positioning end cover 99. A traction pull rod and a transverse stop mounting seat 11 are connected to the outer surface of the long straight section of the outer sleeve 94. The left bearing positioning end cover 92 includes an upper end cover 921 and a lower end cover 922. The left bearing positioning end cover 92 adopts a split structure, which is beneficial to the disassembly and assembly of the articulated crossbeam device 9 and the articulated frame.

[0043] As Figure 3 shown, the inner sleeve 91 adopts a variable cross-section design. Its outer surface includes five cylindrical surfaces with different diameters and a conical surface. Unloading grooves are provided between adjacent cylindrical surfaces with different diameters. Among them, the four unloading grooves at both ends of the left bearing 93 and the right bearing 98 are shallower, and the two unloading grooves at both ends of the middle positioning sleeve 96 are deeper. One end of the inner sleeve 91 is a flange, and the transition between the flange and the outer cylindrical surface of the long straight section of the inner sleeve 91 is realized through an inclined straight section and a fillet. The other end of the inner sleeve 91 is the conical surface to realize the overhang amount at the right end of the right bearing 98 and facilitate the installation of the bearing and the positioning sleeve.

[0044] During assembly, the left bearing 93 is first sleeved on the inner sleeve 91, then the left positioning sleeve 95, the middle positioning sleeve 96, the right positioning sleeve 97 and the right bearing 98 are sleeved on. Then, the inner sleeve 91 is inserted into the outer sleeve 94. The split left bearing positioning end cover 92 is installed at the left end of the outer sleeve 94, and the integral right bearing positioning end cover 99 is installed at the right end of the outer sleeve 94. Thus, the articulated crossbeam device 9 is assembled. After connecting the articulated crossbeam device 9 and the transition pieces 8 on the left side beam 1 and the right side beam 2 with bolt fasteners, the articulated frame is assembled to form an integral frame. Moreover, the left side beam 1 and the right side beam 2 have relatively low torsional stiffness and can perform free nodding and torsional movements.

[0045] As Figure 1 shown, both the left side beam 1 and the right side beam 2 are of single-web structure. On both sides of the single web of the left side beam 1 and the right side beam 2, there is a set of rib plates welded at important structures. A set of box-shaped outrigger beams 6 are respectively connected to the outsides of the left side beam 1 and the right side beam 2. The outrigger beam 6 is located at the longitudinal center of the left side beam 1 and the right side beam 2. An anti-roll torsion bar mounting sleeve 4 is connected to the outside of the outrigger beam 6. An anti-hunting damper mounting seat 5 is connected to the outer cylindrical surface of the anti-roll torsion bar mounting sleeve 4. The two ends of the left side beam 1 and the right side beam 2 are connected to the wheelset through a primary suspension device. The two ends of the left side beam 1 and the right side beam 2 are respectively provided with primary spring mounting seat holes 3. The secondary air spring mounting seat holes 7, the brake device mounting seat 10, the secondary lateral damper mounting seats 13 and the primary longitudinal tie rod mounting seats 12 are arranged on the left side beam 1 and the right side beam 2.

[0046] During use, the articulated frame will be subjected to lateral forces from the primary suspension or the car body. When the outer sleeve 94 receives a lateral force from the right side beam 2 to the left, the lateral force is transmitted to the outer ring of the right bearing 98 through the right bearing positioning sleeve 99. The right bearing 98 relies on its own structure to transmit the force to the inner ring, and the inner ring then transmits the force to the right positioning sleeve 97. The right positioning sleeve 97 then transmits the force to the middle positioning sleeve 96. Then, the middle positioning sleeve 96 transmits the force to the inner sleeve 91 depending on its interference fit relationship with the inner sleeve 91. The inner sleeve 91 transmits the force to the left side beam 1, and the force of the left side beam 1 is transmitted to the wheelset through the primary suspension. Finally, this lateral force will act on the track to achieve force balance. When the left side beam 1 receives a lateral force to the right, the transmission path of the lateral force balance is opposite to the above path.

[0047] During use, when the right beam 2 is subjected to a lateral force to the right, the right beam 2 will exert a rightward pulling force on the outer sleeve 94. This force is transmitted to the outer ring of the left bearing 93 through the left bearing positioning end cover 92. The left bearing 93 will transmit the force to the inner ring through its own structure, and the inner ring will then transmit the force to the left positioning sleeve 95. The left positioning sleeve 95 will then transmit the force to the middle positioning sleeve 96. Then, the middle positioning sleeve 96 transmits the force to the inner sleeve 91 depending on its interference fit relationship with the inner sleeve. The inner sleeve 91 will transmit the force to the left beam 1. The force of the left beam 1 will be transmitted to the wheel set through a series of suspensions and finally act on the track for force balance. When the left beam 1 is subjected to a lateral force to the left, the transmission path of the lateral force balance is opposite to the above path.

[0048] During use, when the left beam 1 and the right beam 2 are subjected to vertical forces from the car body, the two forces will generate bending moments on the articulated crossbeam device 9. Since two left bearings 93 and right bearings 98 with a certain lateral span are arranged on the articulated crossbeam device 9, corresponding forces and bending moments will be generated through the left bearings 93 and the right bearings 98 to balance the above forces and bending moments. When the left beam 1 and the right beam 2 are subjected to longitudinal forces, they can also be balanced relying on the articulated crossbeam device 9.

[0049] Therefore, the articulated frame of the present invention can bear forces in three directions and torques in two directions, only releasing the degree of freedom of the articulated frame to rotate around the horizontal axis. At the same time, the torsional stiffness between the left beam 1 and the right beam 2 is relatively small, that is, the left beam 1 and the right beam 2 can freely nod and twist relative to each other. As a result, the bogie using this articulated frame simultaneously has excellent load sharing performance, line adaptability, curve passing performance, and running stability, and can fundamentally solve the contradiction between running stability and curve passing performance.

[0050] Embodiment 2

[0051] A bogie according to the present invention includes the articulated frame of the railway vehicle bogie as described in Embodiment 1.

[0052] Embodiment 3

[0053] A train according to the present invention includes at least one bogie as described in Embodiment 2.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An articulated frame of a railway vehicle bogie, characterized in that It includes a left beam (1) and a right beam (2) arranged longitudinally and a hinged crossbeam device (9) arranged transversely. The left beam (1), the right beam (2) and the hinged crossbeam device (9) form an H-shaped integral frame. The hinged crossbeam device (9) includes an outer sleeve (94), an inner sleeve (91), a left positioning sleeve (95), a middle positioning sleeve (96), a right positioning sleeve (97), a left bearing positioning end cover (92) and a right bearing positioning end cover (99). The inner sleeve (91) extends into the outer sleeve (94). The outer sleeve (94) and the inner sleeve (91) are connected by a left bearing (93) and a right bearing (98). The left bearing (93) and the right bearing (98) are steel sliding bearings. There is a span between the left bearing (93) and the right bearing (98). The left positioning sleeve (95), the middle positioning sleeve (96) and the right positioning sleeve (97) are sequentially sleeved outside the inner sleeve (91). The middle positioning sleeve (96) is installed on the inner sleeve (91) by an interference fit connection method. The left bearing positioning end cover (92) and the right bearing positioning end cover (99) are respectively connected to the flanges at both ends of the outer sleeve (94). The left bearing (93) is arranged between the left bearing positioning end cover (92) and the left positioning sleeve (95). The right bearing (98) is arranged between the right bearing positioning end cover (99) and the right positioning sleeve (97). The left beam (1) and the right beam (2) can freely twist relative to each other through the left bearing (93) and the right bearing (98).

2. The articulated frame of the bogie of the rail vehicle according to claim 1, characterized in that, Both ends of the left beam (1) and the right beam (2) are connected to the wheel set through a primary suspension device.

3. The articulated frame of the bogie of the rail vehicle according to claim 1, characterized in that, Transition pieces (8) are respectively arranged on the left beam (1) and the right beam (2). The hinged crossbeam device (9) is connected to the transition pieces (8) through a flange structure.

4. The articulated frame of the bogie of the rail vehicle according to claim 1, characterized in that, Both ends of the outer sleeve (94) are in a flange shape. Through holes for bolt connectors are evenly arranged on the flange. The left flange of the outer sleeve (94) is connected to the left bearing positioning end cover (92), and the right flange is connected to the right bearing positioning end cover (99). A traction pull rod and a lateral stop mounting seat (11) are connected to the outer surface of the long straight section of the outer sleeve (94).

5. The articulated frame of the bogie of the rail vehicle according to claim 1, characterized in that, The inner sleeve (91) adopts a variable cross-section design. Its outer surface includes five cylindrical surfaces with different diameters and a conical surface. Unloading grooves are arranged between adjacent cylindrical surfaces with different diameters. Among them, the four unloading grooves at both ends of the left bearing (93) and the right bearing (98) are shallower, and the two unloading grooves at both ends of the middle positioning sleeve (96) are deeper. One end of the inner sleeve (91) is a flange, and the other end is the conical surface.

6. The articulated frame of the railway vehicle bogie according to claim 1, characterized in that The left bearing (93) and the right bearing (98) have the same outer diameter and different inner diameters. Among them, the inner diameter of the left bearing (93) is larger than the inner diameter of the right bearing (98).

7. The articulated frame of the bogie of the rail vehicle according to any one of claims 1-6, characterized in that, The left beam (1) and the right beam (2) are both of single web structure. A set of box-shaped extended beams (6) are respectively connected to the outer sides of the left beam (1) and the right beam (2). The extended beams (6) are located at the longitudinal centers of the left beam (1) and the right beam (2). An anti-roll torsion bar mounting sleeve (4) is connected to the outside of the extended beam (6), and an anti-hunting damper mounting seat (5) is connected to the outer cylindrical surface of the anti-roll torsion bar mounting sleeve (4).

8. A bogie, characterized in that, It includes the articulated frame of the railway vehicle bogie according to any one of claims 1-7.

9. A train, characterized in that, It includes at least one bogie according to claim 8.

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