阅读说明：本技术 一种轨道车辆及其转向架 (Rail vehicle and bogie thereof ) 是由 于云海 霍鑫龙 王卉子 邵立云 姜斌 胡文浩 刘阳 段泽斌 于 2020-08-14 设计创作，主要内容包括：本发明涉及轨道车辆技术领域,具体地,涉及一种轨道车辆及其转向架。该转向架包括构架和二系悬挂装置；构架包括并排设置的两个侧梁、平行设置的两个横梁、以及位于侧梁之间的两组纵向梁；横梁能够沿两个侧梁的排列方向滑动地安装于两个侧梁；每组纵向梁包括跨接于两个横梁的至少一个纵向梁,纵向梁与侧梁平行设置；在横梁的两端部分别设置有一组纵向梁,纵向梁固定安装于两个横梁；在每组纵向梁的顶部固定安装有一个二系悬挂装置。该转向架能够提高轨道车辆小曲率半径的通过能力。(The invention relates to the technical field of railway vehicles, in particular to a railway vehicle and a bogie thereof. The bogie comprises a framework and a secondary suspension device; the framework comprises two side beams arranged side by side, two cross beams arranged in parallel and two groups of longitudinal beams positioned between the side beams; the cross beam is slidably mounted on the two side beams along the arrangement direction of the two side beams; each group of longitudinal beams comprises at least one longitudinal beam bridged between the two cross beams, and the longitudinal beams and the side beams are arranged in parallel; a group of longitudinal beams are respectively arranged at the two end parts of the cross beams, and the longitudinal beams are fixedly arranged on the two cross beams; and a secondary suspension device is fixedly arranged at the top of each group of longitudinal beams. The bogie can improve the passing capacity of the small curvature radius of the railway vehicle.)

1. A bogie, comprising a frame and a secondary suspension, wherein:

the framework comprises two side beams arranged side by side, two cross beams arranged in parallel and two groups of longitudinal beams positioned between the side beams; the cross beam is slidably mounted to the two side members in the arrangement direction of the two side members; each group of longitudinal beams comprises at least one longitudinal beam bridged between the two cross beams, and the longitudinal beams are arranged in parallel with the side beams; a group of longitudinal beams are respectively arranged at two end parts of the cross beams, and the longitudinal beams are fixedly arranged on the two cross beams;

and one secondary suspension device is fixedly arranged at the top of each group of longitudinal beams.

2. The bogie of claim 1, wherein the secondary suspension device comprises a support plate, a plurality of spring assemblies, a pressure plate in one-to-one correspondence with the spring assemblies, and a locating pin in one-to-one correspondence with the spring assemblies;

the bottom surface of the supporting plate is fixedly arranged on the longitudinal beam and is in sliding fit with the top surfaces of the side beams;

spring protection sleeves which correspond to the spring assemblies one by one are fixedly installed on the top surface of the supporting plate and are used for keeping the spring assemblies in a vertical state all the time;

the positioning pin is inserted into the spring assembly in a shape fit manner along the vertical direction and is used for limiting the displacement of the spring assembly in the horizontal direction;

the pressing plate cover is arranged at the top of the spring assembly and is fixedly connected with the positioning pin.

3. The truck of claim 2 wherein the spring assembly includes an outer coil spring and an inner coil spring, the outer coil spring being nested about an outer periphery of the inner coil spring;

the positioning pin is inserted into the inner ring spring.

4. The truck of claim 3 wherein said secondary suspension further comprises a rubber stack housed at the bottom inside each of said spring protective sleeves;

the spring assembly is abutted against the top of the rubber laminated spring.

5. The bogie according to claim 2, wherein a first rail is provided on a bottom surface of the support plate, the first rail extending in the direction of arrangement of the two side members;

first sliding grooves which correspond to the first sliding rails one by one and are matched with the first sliding rails in shape are formed in the top surfaces of the side beams;

the first sliding rail is embedded into the first sliding groove in a sliding fit mode.

6. The bogie according to claim 5, wherein two of the first slide rails are provided in parallel with each other on the bottom surface of the support plate.

7. The bogie according to claim 2, wherein a recessed second slide groove is provided in a bottom surface of the support plate, the second slide groove extending in the arrangement direction of the two side members;

the top surface of the side beam is provided with second sliding rails which correspond to the second sliding grooves one by one and are matched with the second sliding grooves in shape;

the second sliding rail is embedded into the second sliding groove in a sliding fit mode.

8. The bogie according to claim 7, wherein two second sliding grooves are provided in parallel with each other on the bottom surface of the support plate.

9. The truck of claim 2 wherein said side beams are provided with a one-to-one beam mounting hole for each of said cross beams; the end parts of the cross beams are inserted into the corresponding cross beam mounting holes;

the two end parts of the cross beam are fixedly provided with limiting end covers and positioning check rings, the side beams are located between the limiting end covers and the positioning check rings, and the distance between the limiting end covers and the positioning check rings is larger than the thickness of the side beams.

10. The bogie of claim 9, wherein the spacing between the curb end caps and the retaining collars is between 5mm and 10mm greater than the thickness of the side sills.

11. A bogie as claimed in claim 9 in which the cross beam is provided with shoulders for retaining locating collars.

12. The bogie of claim 4, wherein the rubber leaf spring is of a hat-shaped configuration having a convex cushion seat at a top center position and a concave centering groove at a bottom center position;

the buffer seat is arranged opposite to the positioning pin and used for limiting and buffering the positioning pin;

the top of the supporting plate is provided with positioning bulges which correspond to the positioning grooves one to one and are matched with the positioning grooves in shape, and the positioning bulges are inserted into the positioning grooves and used for positioning the rubber laminated spring.

13. A bogie as claimed in any one of claims 2 to 12 in which the secondary suspension means comprises three spring assemblies.

14. The truck of claim 13 wherein three of said spring assemblies are triangularly positioned, with one spring assembly positioned on top of said longitudinal beam and two spring assemblies positioned on top of said side beams;

the supporting plate is a triangular plate.

15. A bogie as claimed in any one of claims 2 to 12 in which the secondary suspension means comprises four spring assemblies.

16. The truck of claim 15 wherein four of said spring assemblies are distributed in a trapezoidal configuration, two of said spring assemblies being located on top of said longitudinal beams and two of said spring assemblies being located on top of said side beams;

the supporting plate is a trapezoidal plate.

17. The truck according to claim 16 wherein the spacing between said spring assemblies of said longitudinal beam top is less than the spacing between said spring assemblies of said side beam top in the direction of alignment of said two cross beams.

18. A rail vehicle, characterized in that it comprises a bogie according to any one of claims 1-17.

Technical Field

The application relates to the technical field of railway vehicles, in particular to a railway vehicle and a bogie thereof.

Background

The existing rail vehicles are important traffic links connecting various cities, and gradually become main vehicles in the cities, and the rail vehicles are also main carriers for realizing goods transportation. The rail vehicle mainly comprises a vehicle body and a bogie arranged below the vehicle body, wherein the bogie is used for bearing the vehicle body and realizing walking and steering functions.

Conventional bogies consist primarily of a frame, wheel sets, traction devices, braking devices, damping devices, axle boxes, primary and secondary suspension devices. Wherein the framework is a main framework of the bogie; the secondary suspension device is fixedly arranged on the framework and used for supporting the vehicle body and realizing the vibration damping effect. However, the conventional secondary suspension device is mounted on a frame and cannot generate lateral displacement, so that the vehicle body of the conventional railway vehicle cannot pass through a curve with a small curvature radius.

Disclosure of Invention

The embodiment of the application provides a railway vehicle and a bogie thereof, and the bogie can improve the passing capacity of the small curvature radius of the railway vehicle.

According to a first aspect of embodiments of the present application there is provided a bogie comprising a frame and a secondary suspension arrangement, wherein:

the framework comprises two side beams arranged side by side, two cross beams arranged in parallel and two groups of longitudinal beams positioned between the side beams; the cross beam is slidably mounted to the two side members in the arrangement direction of the two side members; each group of longitudinal beams comprises at least one longitudinal beam bridged between the two cross beams, and the longitudinal beams are arranged in parallel with the side beams; a group of longitudinal beams are respectively arranged at two end parts of the cross beams, and the longitudinal beams are fixedly arranged on the two cross beams;

and one secondary suspension device is fixedly arranged at the top of each group of longitudinal beams.

Preferably, the secondary suspension device comprises a support plate, a plurality of spring assemblies, pressure plates in one-to-one correspondence with the spring assemblies, and positioning pins in one-to-one correspondence with the spring assemblies;

the bottom surface of the supporting plate is fixedly arranged on the longitudinal beam and is in sliding fit with the top surfaces of the side beams;

spring protection sleeves which correspond to the spring assemblies one by one are fixedly installed on the top surface of the supporting plate and are used for keeping the spring assemblies in a vertical state all the time;

the positioning pin is inserted into the spring assembly in a shape fit manner along the vertical direction and is used for limiting the displacement of the spring assembly in the horizontal direction;

the pressing plate cover is arranged at the top of the spring assembly and is fixedly connected with the positioning pin.

Preferably, the spring assembly comprises an outer ring spring and an inner ring spring, and the outer ring spring is sleeved on the outer periphery of the inner ring spring;

the positioning pin is inserted into the inner ring spring.

Preferably, the secondary suspension device further comprises a rubber stacked spring accommodated at the inner bottom of each spring protection sleeve;

the spring assembly is abutted against the top of the rubber laminated spring.

Preferably, a first protruding slide rail is arranged on the bottom surface of the support plate, and the first slide rail extends along the arrangement direction of the two side beams;

first sliding grooves which correspond to the first sliding rails one by one and are matched with the first sliding rails in shape are formed in the top surfaces of the side beams;

the first sliding rail is embedded into the first sliding groove in a sliding fit mode.

Preferably, two first sliding rails parallel to each other are disposed on the bottom surface of the supporting plate.

Preferably, a concave second slide groove is provided in a bottom surface of the support plate, the second slide groove extending in the arrangement direction of the two side members;

the top surface of the side beam is provided with second sliding rails which correspond to the second sliding grooves one by one and are matched with the second sliding grooves in shape;

the second sliding rail is embedded into the second sliding groove in a sliding fit mode.

Preferably, two second sliding grooves parallel to each other are provided on the bottom surface of the support plate.

Preferably, the side beams are provided with cross beam mounting holes corresponding to each cross beam one to one; the end parts of the cross beams are inserted into the corresponding cross beam mounting holes;

the two end parts of the cross beam are fixedly provided with limiting end covers and positioning check rings, the side beams are located between the limiting end covers and the positioning check rings, and the distance between the limiting end covers and the positioning check rings is larger than the thickness of the side beams.

Preferably, the distance between the limiting end cover and the positioning retainer ring is 5-10 mm larger than the thickness of the side beam.

Preferably, the cross beam is provided with a shaft shoulder for limiting the positioning retainer ring.

Preferably, the rubber laminated spring is of a cap-shaped structure, a convex buffer seat is arranged at the center of the top, and a concave positioning groove is arranged at the center of the bottom;

the buffer seat is arranged opposite to the positioning pin and used for limiting and buffering the positioning pin;

the top of the supporting plate is provided with positioning bulges which correspond to the positioning grooves one to one and are matched with the positioning grooves in shape, and the positioning bulges are inserted into the positioning grooves and used for positioning the rubber laminated spring.

Preferably, the secondary suspension comprises three spring assemblies.

Preferably, three of the spring assemblies are distributed in a triangular shape, wherein one spring assembly is positioned at the top of the longitudinal beam, and two spring assemblies are positioned at the top of the side beam;

the supporting plate is a triangular plate.

Preferably, the secondary suspension comprises four spring assemblies.

Preferably, four spring assemblies are distributed in a trapezoid shape, wherein two spring assemblies are positioned at the top of the longitudinal beam, and the other two spring assemblies are positioned at the top of the side beam;

the supporting plate is a trapezoidal plate.

Preferably, in the arrangement direction of the two cross members, the distance between the two spring assemblies of the top of the longitudinal beam is smaller than the distance between the two spring assemblies of the top of the side beam.

According to a second aspect of embodiments of the present application, there is provided a rail vehicle comprising any one of the bogies provided in the above-mentioned claims.

Adopt rail vehicle and bogie thereof that provides in this application embodiment, have following beneficial effect:

in the bogie, the framework comprises side beams, cross beams and longitudinal beams, wherein two ends of each cross beam are respectively provided with a group of longitudinal beams which are fixedly arranged on the two cross beams, the top of each group of longitudinal beams is fixedly provided with a secondary suspension device, and the cross beams can be arranged on the two side beams in a sliding manner along the arrangement direction of the side beams; the secondary suspension device is fixedly connected with the cross beam into a whole through the longitudinal beam, when the car body passes through a curve with a small curvature radius, the car body generates transverse displacement, the car body drives the secondary suspension device to generate transverse displacement, and the supporting plate at the bottom of the secondary suspension device drives the cross beam to relatively slide relative to the side beam, so that the passing capacity of the small curvature radius of the rail car is improved, and the problem that the car body of the rail car cannot pass through the curve with the small curvature radius because the existing secondary suspension device cannot generate transverse displacement is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic perspective view of a bogie according to an embodiment of the present application;

FIG. 2 is a top view of the truck provided in FIG. 1;

FIG. 3 is a side view of the truck provided in FIG. 1;

FIG. 4 is a top view of another truck provided in an embodiment of the present application;

FIG. 5 is a schematic illustration of an exploded structure between the frame and the secondary suspension of the truck of FIG. 1;

FIG. 6 is a cross-sectional view of the truck of FIG. 3 along the central axis of the beam;

FIG. 7 is a partially enlarged view of portion A of FIG. 6;

FIG. 8 is a schematic view of the cross member of FIG. 6 at the rightmost end;

FIG. 9 is a schematic sectional view showing an assembling structure of the secondary suspension device and the side member;

FIG. 10 is a bottom view of a secondary suspension provided in accordance with an embodiment of the present application;

fig. 11 is a schematic perspective view of a secondary suspension device provided in an embodiment of the present application with a spring assembly removed.

Reference numerals:

1-a side beam; 2-a cross beam; 3-longitudinal beam; 4-wheel pair; 6-secondary suspension device; 7-a traction device;

11-a first runner; 21-a limit end cover; 22-positioning a retainer ring; 23-a liner; 61-a support plate; 62-a spring assembly; 63-pressing plate; 64-a locating pin; 65-a spring protection sleeve; 66-rubber stack spring;

611-a first sliding rail; 612-positioning protrusions; 621-outer ring spring; 622-inner coil spring; 661-cushion seat; 662-positioning groove.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the embodiment of the application, the longitudinal direction is the traveling direction of the railway vehicle, the arrangement direction of two wheel pairs, the arrangement direction of two cross beams or the length extension direction of a side beam; the transverse direction is the vehicle width direction of the railway vehicle, the axial direction of an axle in wheel centering, the length extending direction of a cross beam or the arrangement direction of two side beams; the vertical direction is the height direction of the railway vehicle or the height direction of a spring assembly in the secondary suspension device.

The embodiment of the application provides a railway vehicle and a bogie thereof, wherein the railway vehicle comprises the bogie and a vehicle body (not shown in the figure) installed on the bogie. The detailed structure of the bogie employed in the railway vehicle will be described below, with reference to fig. 1, 2, 3 and 4.

As shown in the configuration of fig. 1, the bogie comprises a frame, a secondary suspension device 6, a wheel pair 4 for moving along a steel rail and a traction device 7 for connecting a vehicle body; wherein:

the framework comprises two side beams 1 arranged side by side, two cross beams 2 arranged in parallel and two groups of longitudinal beams 3 positioned between the side beams 1; the cross member 2 is slidably attached to the two side members 1 in the arrangement direction of the two side members 1; each group of longitudinal beams 3 comprises at least one longitudinal beam 3 bridged over the two cross beams 2, and the longitudinal beam 3 is arranged in parallel with the side beam 1; a group of longitudinal beams 3 are respectively arranged at two end parts of the cross beams 2, and the longitudinal beams 3 are fixedly arranged on the two cross beams 2; as shown in the structures of fig. 1, 2 and 3, two cross beams 2 are installed between two parallel side beams 1, the two cross beams 2 are arranged in parallel and at intervals, the two cross beams 2 are vertically distributed with the side beams 1, the arrangement direction of the two side beams 1 is overlapped with the arrangement direction of the steel rails, and the length direction of the cross beams 2 is overlapped with the width direction of the railway vehicle; the length direction of the side beam 1 is superposed with the advancing direction of the rail vehicle, the length direction of the rail vehicle, the arrangement direction of the two cross beams 2 and the extending direction of the steel rail; the cross beam 2 can be made of steel pipes; a group of longitudinal beams 3 are respectively arranged at the end parts of the two cross beams 2 close to the side beams 1, the longitudinal beams 3 are bridged at the upper parts of the two cross beams 2, and the longitudinal beams 3 are fixedly connected with the cross beams 2; the set of longitudinal beams 3 may comprise two longitudinal beams 3 arranged side by side, or may comprise only one longitudinal beam 3; when each set of longitudinal beams 3 comprises two longitudinal beams 3 arranged side by side, the two longitudinal beams 3 are arranged closely between the transverse directions, i.e. there is no gap between the two longitudinal beams 3 of the same set;

a secondary suspension device 6 is fixedly arranged at the top of each group of longitudinal beams 3; as shown in the structure of fig. 6 and 8, a secondary suspension device 6 is fixedly mounted on the top of each group of longitudinal beams 3 arranged at the end part of the cross beam 2, one part of the secondary suspension device 6 is fixedly mounted on the top of the longitudinal beam 3, and the other part is supported on the top of the side beam 1.

In the bogie, the framework comprises side beams 1, cross beams 2 and longitudinal beams 3, a group of longitudinal beams 3 are respectively arranged at two end parts of each cross beam 2, the longitudinal beams 3 are fixedly arranged on the two cross beams 2, a secondary suspension device 6 is fixedly arranged at the top of each group of longitudinal beams 3, the cross beams 2 can be slidably arranged on the two side beams 1 along the arrangement direction of the side beams 1, and the secondary suspension devices 6 are fixedly connected with the cross beams 2 into a whole through the longitudinal beams 3; when the car body passes through a curve with a small curvature radius, the car body generates transverse displacement, the car body drives the secondary suspension device 6 to generate transverse displacement, the supporting plate 61 at the bottom of the secondary suspension device 6 drives the cross beam 2 to relatively slide relative to the side beam 1, the passing capacity of the small curvature radius of the railway vehicle is improved, and the problem that the car body of the railway vehicle cannot pass through the curve with the small curvature radius due to the fact that the existing secondary suspension device 6 cannot generate transverse displacement is solved, and therefore the passing capacity of the small curvature radius of the railway vehicle can be improved.

As shown in the structures of fig. 5, 6, 9, 10 and 11, the secondary suspension device 6 includes a support plate 61, a plurality of spring assemblies 62, pressure plates 63 corresponding to the spring assemblies 62 one by one, and positioning pins 64 corresponding to the spring assemblies 62 one by one; the plurality of spring assemblies 62 may be 3 as set forth in 4, or 4 as set forth in fig. 5, or 5 or more; the bottom surface of the support plate 61 is fixedly arranged on the longitudinal beam 3 and is in sliding fit with the top surface of the side beam 1; the supporting plate 61 serves as a base of the secondary suspension device 6 and is used for providing a mounting base for other parts of the secondary suspension device 6; spring protective sleeves 65 which are in one-to-one correspondence with the spring assemblies 62 are fixedly mounted on the top surface of the supporting plate 61, and the spring protective sleeves 65 are used for keeping the spring assemblies 62 in a vertical state all the time, namely, an installation space is provided for each spring assembly 62 on the supporting plate 61, the spring assemblies 62 are limited in the horizontal direction, the spring assemblies 62 are prevented from toppling, and the spring assemblies 62 are compressed or extended in the vertical direction all the time; the positioning pin 64 is inserted inside the spring assembly 62 in a shape-fitting manner in the vertical direction for limiting the displacement of the spring assembly 62 in the horizontal direction; as shown in fig. 9 and 11, the positioning pin 64 is vertically installed on the top of the spring assembly 62, and is fixedly connected with the pressing plate 63 on the top of the spring assembly 62 by a fastener such as a screw, the cross section of the positioning pin 64 is larger and matched with the inner space of the spring assembly 62, and the positioning pin 64 limits the position of the spring assembly 62 to prevent the spring assembly 62 from displacing; the pressing plate 63 covers the top of the spring assembly 62 and is fixedly connected with the positioning pin 64.

The secondary suspension device 6 is fixedly mounted on the top of the longitudinal beam 3 through a support plate 61, and the secondary suspension device 6 is supported on the upper parts of the longitudinal beam 3 and the side beam 1 through the support plate 61; the pressure plate 63 of the secondary suspension device 6 is used for connecting the vehicle body, the vehicle body is installed on the framework through the secondary suspension device 6, and the vibration damping and the buffering of the vehicle body in the longitudinal direction are realized through the compression and the resetting of the spring assembly 62; the spring assembly 62 is limited in displacement in the horizontal direction by a spring protection sleeve 65 fixedly mounted at the top of the support plate 61 and a positioning pin 64 fixedly connected with the pressure plate 63, so that the spring assembly 62 is ensured to always work in a vertical state to realize longitudinal buffering and vibration reduction.

As shown in fig. 6 and fig. 9, the spring assembly 62 includes an outer ring spring 621 and an inner ring spring 622, the outer ring spring 621 is disposed on the outer circumference of the inner ring spring 622; the positioning pin 64 is inserted into the inside of the inner coil spring 622. Both the outer coil spring 621 and the inner coil spring 622 may be steel springs.

Because the spring assembly 62 adopts the double-layer spring which is sleeved, the outer ring spring 621 of the outer ring and the inner ring spring 622 of the inner ring can provide elastic force at the same time, and therefore, the secondary suspension device 6 adopting the spring assembly 62 can improve the elastic force of the spring assembly 62 on the premise of fully utilizing the space, and improve the bearing capacity and the vibration attenuation capacity of the secondary suspension device 6.

As shown in the structure of fig. 9, the secondary suspension device 6 further includes a rubber spring stack 66 housed in the bottom of each spring protection sleeve 65; the spring assembly 62 abuts on the top of the rubber stack spring 66, and the rubber stack spring 66 is located between the support plate 61 and the spring assembly 62. Through addding the rubber of folding spring 66 between backup pad 61 and spring unit 62, can separate backup pad 61 and spring unit 62, prevent to take place the friction loss between spring unit 62 and the backup pad 61, when further improving secondary suspension device 6's elasticity and buffering damping effect, still be favorable to protecting spring unit 62 and backup pad 61, be favorable to improving the life of spring unit 62 and backup pad 61, thereby guarantee secondary suspension device 6's buffering damping performance.

The rubber leaf spring 66 may be a cap-shaped structure having a convex buffer base 661 at a top center position and a concave positioning groove 662 at a bottom center position; the buffer seat 661 is arranged opposite to the positioning pin 64 and used for limiting and buffering the positioning pin 64; the top of the supporting plate 61 is provided with positioning protrusions 612 which correspond to the positioning grooves 662 in a one-to-one and are matched with the positioning grooves 662 in shape, and the positioning protrusions 612 are inserted into the positioning grooves 662 and are used for positioning the rubber laminated spring 66. Because the buffering seat 661 on the top of the rubber laminated spring 66 is arranged opposite to the positioning pin 64 and a gap is formed between the buffering seat 661 and the positioning pin 64, the positioning pin 64 can be limited and buffered through the buffering seat 661 under the condition that the secondary suspension device 6 is compressed by gravity, the spring assembly 62 is further protected, and the secondary suspension device 6 is prevented from being damaged due to overlarge pressure; meanwhile, a positioning groove 662 is formed in the bottom of the rubber laminated spring 66, a positioning protrusion 612 on the top of the supporting plate 61 is in plug-in fit with the positioning groove 662 of the rubber laminated spring 66, and the positioning of the rubber laminated spring 66 is realized through the positioning groove 662 and the positioning protrusion 612, so that the rubber laminated spring 66 is limited on the supporting plate 61, the rubber laminated spring 66 is prevented from being displaced under the pressure action of the spring assembly 62, and the rubber laminated spring 66 is enabled to work between the supporting plate 61 and the spring assembly 62 all the time.

In order to ensure the displacement of the secondary suspension device 6 in the lateral direction, as shown in the structure of fig. 5, 9 and 10, a first rail 611 protruding is provided on the bottom surface of the support plate 61, and the first rail 611 extends in the arrangement direction of the two side members 1; as shown in the structure of fig. 10, two first sliding rails 611 parallel to each other are disposed on the bottom surface of the supporting plate 61, the cross-sectional shape of the first sliding rails 611 is rectangular, during actual use, the number of the first sliding rails 611 may be 1, 2, 3 or more, the cross-sectional shape of the first sliding rails 611 may also be any shape such as trapezoid, square, triangle, dovetail, etc., and the number and the cross-sectional shape of the first sliding rails 611 may be set according to actual circumstances; the top surface of the side beam 1 is provided with first sliding grooves 11 which correspond to the first sliding rails 611 in a one-to-one and form-fit manner, that is, when the bottom surface of the support plate 61 is provided with two first sliding rails 611, the top surface of the side beam 1 is also provided with two corresponding first sliding grooves 11; the first slide rail 611 is inserted into the first slide groove 11 in a sliding fit manner.

Similarly, a concave second sliding groove (not shown) may be provided on the bottom surface of the support plate 61, the second sliding groove extending in the arrangement direction of the two side members 1; two second sliding grooves which are parallel to each other are arranged on the bottom surface of the supporting plate 61; the top surface of the side beam 1 is provided with second sliding rails (not shown in the figure) which correspond to the second sliding grooves one by one and are matched with the second sliding grooves in shape; the second sliding rail is embedded into the second sliding groove in a sliding fit mode.

Through the bottom surface at backup pad 61 and the top surface of curb girder 1 set up unsmooth complex slide rail spout structure, can take place when relative slip between crossbeam 2 and curb girder 1, lead secondary suspension device 6 through mutually supporting of slide rail and spout between secondary suspension device 6 and the curb girder 1, make secondary suspension device 6 slide along transversely all the time, guarantee secondary suspension device 6's operational reliability and stability, prevent to make secondary suspension device 6 dangerous condition appear because of sliding, thereby improve rail vehicle's operational safety nature.

As shown in the structure of fig. 7 and 8, the side beam 1 is provided with cross beam mounting holes (not shown in the figure) corresponding to each cross beam 2 one to one, that is, as shown in the structure of fig. 2 and 5, when the framework includes two cross beams 2, two cross beam mounting holes are provided on each side beam 1, and each cross beam mounting hole corresponds to one cross beam 2 one to one; the end part of the beam 2 is inserted into the corresponding beam mounting hole, and the end part of the beam 2 can slide in the transverse direction in the beam mounting hole; the two ends of the cross beam 2 are fixedly provided with a limiting end cover 21 and a positioning retainer ring 22, the side beam 1 is positioned between the limiting end cover 21 and the positioning retainer ring 22, and the distance between the limiting end cover 21 and the positioning retainer ring 22 is larger than the thickness of the side beam 1, namely, the limiting end cover 21 and the positioning retainer ring 22 are arranged at one end of the cross beam 2, and the limiting end cover 21 and the positioning retainer ring 22 are also arranged at the other end of the cross beam 2; at arbitrary one end of crossbeam 2, curb girder 1 all is located between spacing end cover 21 and the location retaining ring 22 for the biggest lateral displacement of crossbeam 2 is the difference between the interval between spacing end cover 21 and the location retaining ring 22 and curb girder 1 thickness, namely, the lateral displacement distance of crossbeam 2 is the limit value, like: the distance between the limiting end cover 21 and the positioning retainer ring 22 is 5 mm-10 mm larger than the thickness of the side beam 1, namely, the transverse displacement range of the cross beam 2 is 5 mm-10 mm, and specifically can be 5mm, 6mm, 7mm, 8mm, 9mm and 10 mm. Crossbeam 2 is provided with and is used for carrying out spacing shaft shoulder (not shown in the figure) to location retaining ring 22, and location retaining ring 22 cover is established at the tip of crossbeam 2, carries out spacingly to location retaining ring 22 through the shaft shoulder that sets up at crossbeam 2 tip for the interval between location retaining ring 22 and the spacing end cover 21 is fixed. When the cross member 2 is mounted to the cross member mounting hole of the side member 1, a bush 23 for protecting the cross member 2 may be further fitted over the cross member 2.

As shown in the configurations of fig. 2 and 4, the secondary suspension 6 may include three spring assemblies 62 or four spring assemblies 62; each secondary suspension 6 may comprise three spring assemblies 62 or four spring assemblies 62, in a bogie, there are six spring assemblies 62 or eight spring assemblies 62 at a time; when each secondary suspension 6 comprises three spring assemblies 62, the three spring assemblies 62 are distributed in a triangular shape, wherein one spring assembly 62 is positioned on the top of the longitudinal beam 3 and two spring assemblies 62 are positioned on the top of the side beam 1; the support plate 61 may be a triangular plate or a trapezoidal plate; when each secondary suspension 6 comprises four spring assemblies 62, the four spring assemblies 62 are distributed in a trapezoidal shape, wherein two spring assemblies 62 are positioned on the top of the longitudinal beam 3, and the other two spring assemblies 62 are positioned on the top of the side beam 1; the support plate 61 is a trapezoidal plate.

Because the three spring assemblies 62 of each secondary suspension device 6 are distributed in a triangular shape and the four spring assemblies 62 are distributed in a trapezoidal shape, the spring assemblies 62 of the secondary suspension device 6 can be uniformly stressed, and the buffering and vibration damping effect is improved; and because two spring unit 62 in each secondary suspension device 6 are located the top of curb girder 1, namely, two spring unit 62 are located the outside, can improve anti roll ability, and the weight of automobile body can directly transmit to curb girder 1 through two spring unit 62 of outside for the transmission of pressure is more direct, has reduced the transmission of pressure through the route of longitudinal beam 3 and crossbeam 2, makes the bearing capacity of bogie strong and job stabilization nature good.

As shown in the structure of fig. 1 and 2, when each secondary suspension device 6 includes four spring assemblies 62, the distance between the two spring assemblies 62 at the top of the longitudinal beam 3 is smaller than the distance between the two spring assemblies 62 at the top of the side beam 1 in the arrangement direction of the two cross beams 2, and by setting the distance between the two spring assemblies 62 to different values, the bearing area of the secondary suspension device 6 is increased, and the vehicle body or the side beam 1 is prevented from being damaged due to excessive local pressure.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.