CN112519825B

CN112519825B - Bogie and rail vehicle

Info

Publication number: CN112519825B
Application number: CN202011426881.5A
Authority: CN
Inventors: 张文朝; 赵冬霞; 马荣; 杨志国; 汪金余; 任春雨
Original assignee: CRRC Tangshan Co Ltd
Current assignee: CRRC Tangshan Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2022-04-15
Anticipated expiration: 2040-12-09
Also published as: CN112519825A

Abstract

The embodiment of the application provides a bogie and rail vehicle, wherein, the bogie includes: a cross member extending in a transverse direction; the secondary suspension mounting seats are two in number and are symmetrically arranged on the top surface of the cross beam; a longitudinally through mounting channel is formed between the secondary suspension mounting seat and the cross beam; the longitudinal direction and the transverse direction are two horizontal directions which are vertical to each other; a side member extending in a longitudinal direction; the number of the side beams is two, and the two side beams are arranged side by side and respectively penetrate through one installation channel. The bogie provided by the embodiment of the application has the advantages that the middle cross beam and the side beams are independent structures, the size is small, the production, the transportation and the assembly are easy, and the assembly efficiency can be improved.

Description

Bogie and rail vehicle

Technical Field

The application relates to a rail vehicle walking technology, in particular to a bogie and a rail vehicle.

Background

The rail vehicle is an important traffic tie connecting cities, is gradually a main vehicle in the cities, and is also a main carrier for realizing goods transportation. The rail vehicle mainly includes: the bogie is used for bearing the vehicle body and realizing walking and steering functions.

The bogie comprises a framework, wheel pairs, a traction device, a buffer device and other structures, wherein the framework comprises two side beams extending along the vehicle length direction and a cross beam connecting the two side beams, and the connection modes between the cross beam and the side beams are various. After studying various forms of bogies, the skilled person has found that conventional bogies have some technical drawbacks, such as: the self weight is large, so that the acting force of the wheel pair is large, the abrasion of the wheel rail is large, and large noise is generated; the frame is rigidly connected, so that the damping capacity is poor, the carriage vibration is large, and the riding comfort is poor; the wheel load reduction rate is high, and the safety is reduced; the problem that the carriage is prone to side turning due to poor anti-side rolling capacity is solved, the carriage is greatly vibrated due to insufficient vertical buffering capacity, the riding comfort is poor, the traction efficiency is low due to large dead weight, and the assembly efficiency is low due to unreasonable component mounting layout.

Disclosure of Invention

In order to solve one of the technical defects, the embodiment of the application provides a bogie and a railway vehicle.

An embodiment of a first aspect of the present application provides a bogie, including:

a cross member extending in a transverse direction;

the secondary suspension mounting seats are two in number and are symmetrically arranged on the top surface of the cross beam; a longitudinally through mounting channel is formed between the secondary suspension mounting seat and the cross beam; the longitudinal direction and the transverse direction are two horizontal directions which are vertical to each other;

a side member extending in a longitudinal direction; the number of the side beams is two, and the two side beams are arranged side by side and respectively penetrate through one installation channel.

An embodiment of a second aspect of the present application provides a rail vehicle, including: a bogie as described above.

The bogie that this application embodiment provided adopts the crossbeam setting in the middle part below of two curb girders, and two secondary suspension mount pad symmetries set up the top surface at the crossbeam, form along the installation passageway that vertically link up between secondary suspension mount pad and the crossbeam, and the curb girder wears to establish in the installation passageway, and the weight load of automobile body passes through secondary suspension device, secondary suspension mount pad, curb girder transmission for the wheel pair. The structure of the bogie that this embodiment provided is all inequality with any bogie of tradition, compares in the integrative structure of traditional crossbeam and curb girder, and crossbeam, the curb girder that this embodiment provided are independent structure, and the volume is less, easily production, transportation and assembly, can improve assembly efficiency.

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 structural view of a cross beam, a side beam and a secondary suspension mount of a bogie according to an embodiment of the present invention;

FIG. 2 is an exploded view of a cross beam, side beams and secondary suspension mounts of the truck according to an embodiment of the present application;

FIG. 3 is a top perspective view of a secondary suspension mount provided in accordance with an embodiment of the present application;

FIG. 4 is a bottom perspective view of a secondary suspension mount provided in accordance with an embodiment of the present application;

FIG. 5 is a partial cross-sectional view of a secondary suspension mount provided in accordance with an embodiment of the present application assembled with side and cross members;

FIG. 6 is a perspective view of a side sill provided in an embodiment of the present application;

FIG. 7 is a front view of a side sill provided in an embodiment of the present application;

FIG. 8 is another front view of the side rail provided by the embodiments of the present application;

FIG. 9 is a schematic view of the side sill of the present embodiment subjected to a first vertical load;

FIG. 10 is a schematic view of the side sill of the present embodiment receiving a second vertical load;

FIG. 11 is a perspective view of a beam provided in accordance with an embodiment of the present application;

fig. 12 is a perspective view of a single cross beam provided in an embodiment of the present application;

FIG. 13 is a cross-sectional view of a beam provided in accordance with an embodiment of the present application;

FIG. 14 is an enlarged view of a portion of the area A in FIG. 13;

fig. 15 is an exploded view of two cross beam units connected according to the embodiment of the present application;

fig. 16 is a schematic structural diagram of a bogie provided with a secondary suspension device according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a secondary suspension mounting base connected to a traction motor through a motor balancing pole according to an embodiment of the present application;

fig. 18 is a schematic connection diagram of a direct drive motor and an axle provided in the embodiment of the present application;

fig. 19 is a schematic cross-sectional view of a direct drive motor and an axle provided in the embodiment of the present application;

FIG. 20 is an enlarged partial view of region B of FIG. 19;

fig. 21 is a schematic perspective view of a balance bar of a motor according to an embodiment of the present application;

fig. 22 is a cross-sectional view of a connection between a rod body and a node of a motor balance rod provided in an embodiment of the present application;

fig. 23 is an exploded view of a motor balance bar according to an embodiment of the present disclosure.

Reference numerals:

1-a side beam; 11-main side beam panels; 111-the middle section of the mainboard; 112-main board transition section; 113-a motherboard connecting section; 12-auxiliary side beam plate; 121-middle section of auxiliary board; 122-auxiliary plate transition section; 123-auxiliary board connecting section; 13-elastic stop; 14-a buffer gap; 15-first side rail locating pin; 16-a second side beam locating pin; 17-third side rail locating pin; 18-positioning the metal piece;

2-a cross beam; 21-a beam body; 210-a first pin hole; 211-side beam alignment pin holes; 212-a second series mounting table; 2121-series bolt holes; 2122-two series of positioning holes; 22-beam connecting arm; 23-beam connecting pin; 24-beam connection flange; 25-beam connection node; 26-beam connection gasket; 27-beam mounting ring; 28-beam connecting bolts;

31-axle; 32-a wheel; 33-axle boxes; 333-sealing bearing;

8-secondary suspension mounting seats; 81-mounting a base top plate; 82-mount side plate; 83-mount connection; 84-mount bolt holes; 85-mounting seat positioning protrusions; 86-side beam positioning counter bores; 871-lower transition plate; 872-upper transition plate; 88-secondary mounting portion; 89-a motor mounting part; 810-air spring;

91-direct drive motor; 911-a stator; 912-end cap; 912 a-gullet; 913-a rotor; 92-motor balancing pole; 921-rod body; 922-node; 923-a metal retainer ring; 923 a-a positioning boss; 923 b-a card slot; 924-a spring collar; 93-dustproof check ring; 931-mounting the main body; 932-an extension ring; 933-annular seal teeth.

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.

The embodiment provides a bogie, which can be applied to a rail vehicle, wherein the rail vehicle can be an internal combustion locomotive or an electric locomotive, can be a motor train unit, a subway, a light rail or a tramcar, and can be a passenger vehicle or a freight vehicle.

In the present embodiment, the traveling direction of the vehicle is referred to as a longitudinal direction, a horizontal direction perpendicular to the longitudinal direction is referred to as a lateral direction, and a direction perpendicular to a horizontal plane is referred to as a vertical direction or a vertical direction.

Fig. 1 is a schematic structural diagram of a cross beam, a side beam and a secondary suspension mount of a bogie provided in an embodiment of the present application, and fig. 2 is an exploded view of the cross beam, the side beam and the secondary suspension mount of the bogie provided in the embodiment of the present application. As shown in fig. 1 and 2, the present embodiment provides a bogie including: side beam 1, crossbeam 2, wheel pair, draw gear, secondary suspension device and secondary suspension mount pad 8. The wheel set, the traction device and the secondary suspension device can adopt the conventional scheme, so that the detailed description of the assembling structure of the side beam 1 and the cross beam 2 is omitted in the figures 1 and 2.

The side members 1 extend in the longitudinal direction, and the number thereof is two, and the two side members 1 are arranged side by side. The cross member 2 extends in the lateral direction, below the middle of the two side members 1. The secondary suspension mounting seats 8 are two in number and are symmetrically arranged on the top surface of the cross beam 2. A longitudinally through mounting channel is formed between the secondary suspension mounting seat 8 and the cross beam 2, the side beam 1 penetrates through the mounting channel, and the middle part of the side beam 1 is positioned in the mounting channel.

The side beam 1 and the cross beam 2 are two independent structures, in the assembling process, the side beam is firstly placed at the mounting position of the cross beam 2, and then the secondary suspension mounting seat 8 is covered on the side beam 1 and assembled with the cross beam 2.

The secondary suspension device is arranged at the top of the secondary suspension mounting seat, and the top end of the secondary suspension device is connected with the vehicle body. The wheel sets are arranged below the ends of the side beams. The load of the vehicle body is transmitted to the wheel pair through the secondary suspension device, the secondary suspension mounting seat 8 and the side beam in sequence.

The bogie that this embodiment provided adopts the crossbeam setting in the middle part below of two curb girders, and two secondary suspension mount pads symmetry set up the top surface at the crossbeam, form along the installation passageway that vertically link up between secondary suspension mount pad and the crossbeam, and the curb girder wears to establish in the installation passageway, and the weight load of automobile body passes through secondary suspension device, secondary suspension mount pad, curb girder transmission for the wheel pair. The structure of the bogie that this embodiment provided is all inequality with any bogie of tradition, compares in the integrative structure of traditional crossbeam and curb girder, and crossbeam, the curb girder that this embodiment provided are independent structure, and the volume is less, easily production, transportation and assembly, can improve assembly efficiency.

On the basis of the above technical solution, the present embodiment provides a specific implementation manner of a bogie:

as shown in fig. 2, the beam 2 is provided with two series of mounting bases 212, and the two series of mounting bases 212 protrude from the upper surface of the beam 2. The secondary mount bases 212 are two in number and are spaced apart in the lateral direction, and the side member 1 is disposed in a recessed area formed between the two secondary mount bases 212. Secondary suspension mounting seat 8 is arranged over side member 1, and the bottoms of both sides of secondary suspension mounting seat 8 are connected to secondary mounting table 212.

A specific implementation manner is as follows: fig. 3 is a top perspective view of a secondary suspension mount provided in an embodiment of the present application, fig. 4 is a bottom perspective view of the secondary suspension mount provided in the embodiment of the present application, and fig. 5 is a partial sectional view of the secondary suspension mount provided in the embodiment of the present application assembled with a side sill and a cross member. As shown in fig. 3 to 5, the secondary suspension mount 8 includes: a mount top plate 81 and a mount side plate 82.

Wherein, the top plate 81 of the installation seat extends along the horizontal direction, and the top surface of the installation seat is used for installing a secondary suspension device. The mount base side plates 82 are vertically arranged and parallel to the longitudinal direction, the number of the mount base side plates 82 is two, and the top ends of the two mount base side plates 82 are connected to two opposite edges of the mount base top plate 81 respectively. The bottom end of the mount side plate 82 is bent outward to form a mount connecting portion 83, and the mount connecting portion 83 is fixedly connected to the secondary mount 212.

Specifically, the mount base connecting portion 83 is provided with mount base bolt holes 84 at both ends thereof, and bolt holes are correspondingly provided in the secondary mount base 212, and the mount base connecting portion 83 is fixed to the secondary mount base 212 by bolts.

Further, a mounting seat positioning protrusion 85 is formed on the bottom surface of each mounting seat connecting portion 83, and the mounting seat positioning protrusions 85 on the two mounting seat connecting portions 83 may be cylindrical. Circular positioning holes and long circular positioning holes are correspondingly formed in the secondary mounting table 212, one mounting seat positioning protrusion 85 is inserted into the circular positioning holes for accurate positioning, the other mounting seat positioning protrusion 85 is inserted into the long circular positioning holes, production deviation of the mounting seat positioning protrusion 85 can be adapted, and the problem that production rhythm is influenced due to the fact that production deviation cannot be used for positioning is avoided.

Or, the mounting seat positioning protrusion 85 on one of the mounting seat connecting portions 83 is cylindrical, and the mounting seat positioning protrusion 85 on the other mounting seat connecting portion 83 is long cylindrical. The second-series mounting table 212 is correspondingly provided with a circular positioning hole and a long circular positioning hole, and the cylindrical mounting seat positioning bulge 85 and the long circular cylindrical mounting seat positioning bulge 85 are respectively inserted in the circular positioning hole and the long circular cylindrical positioning hole.

Further, the present embodiment provides a specific implementation manner of the side beam 1:

fig. 6 is a perspective view of a side sill provided in the embodiment of the present application, fig. 7 is a front view of the side sill provided in the embodiment of the present application, fig. 8 is another front view of the side sill provided in the embodiment of the present application, fig. 9 is a schematic view of the side sill provided in the embodiment of the present application bearing a first vertical load, and fig. 10 is a schematic view of the side sill provided in the embodiment of the present application bearing a second vertical load.

As shown in fig. 6 to 10, the bogie side member provided in the present embodiment is a double-deck side member, including: a main side beam panel 11, an auxiliary side beam panel 12 and an elastic stopper 13. The main side beam plate 11 and the auxiliary side beam plate 12 are both made of elastic composite fiber materials, and have the advantages of light weight, elastic deformation and the like.

The main side member panel 11 and the sub side member panel 12 are stacked up and down, and are bilaterally symmetrical as shown in fig. 7. The auxiliary side member plate 12 is stacked above the main side member plate 11. The middle bottom surface of the sub side rail panel 12 is in contact with the top surface of the main side rail panel 11. The two ends of the auxiliary side beam plate 12 are suspended, namely: the bottom surfaces of both ends of the sub side sills 12 and the top surface of the main side sill 11 have a cushion gap 14 therebetween.

The elastic stopper 13 is provided at an end of the auxiliary side member plate 12 within the cushion gap 14. When the side sill is not vertically loaded, the elastic stopper 13 has a certain clearance from the upper surface of the main side sill panel 11. When the middle portion of the side member is subjected to the first vertical load, the main side rail panel 11 is slightly elastically deformed, and the elastic stopper 13 has a clearance from the top surface of the main side rail panel 11, as shown in fig. 9. When the middle portions of the side members bear a second, larger vertical load, the main side member panel 11 and the auxiliary side member panel 12 are more elastically deformed, and the middle portions of the main side member panel 11 and the auxiliary side member panel 12 are pressed to move downward, and the both ends move upward and inward until the elastic stoppers 13 come into contact with the top surfaces of the main side member panel 11, as shown in fig. 10.

When the vehicle is empty or full, the vehicle load is small, and the elastic stopper 13 is not in contact with the main side rail panel 11, as shown in fig. 9. Only the main side beam plate 11 bears vertical force and transmits the vertical force to the wheel set, only the main side beam plate 11 generates elastic deformation, and the auxiliary side beam plate 12 is not stressed and does not provide support rigidity.

When the vehicle is overloaded, the vehicle load is large, the sub side rail panel 12 moves down, and the elastic stopper 13 comes into contact with the main side rail panel 11, as shown in fig. 10. At the moment, the load of the vehicle is simultaneously borne by the main side beam plate 11 and the auxiliary side beam plate 12 and vertical rigidity is provided, so that the supporting rigidity provided by the bogie is increased along with the increase of the load of the vehicle, the vibration amplitude of the carriage is in a smaller range under different load conditions of the vehicle, and the riding comfort is improved.

Specifically, the main side sill 11 includes: the main board middle section 111, the main board transition section 112 and the main board connection section 113. Wherein, a main board transition section 112 and a main board connection section 113 extend from two ends of the main board middle section 111 respectively. The main plate connection section 113 is located at the end of the main side sill plate 11.

The height of the main board middle section 111 is lower than that of the main board connecting section 113, and the main board transition section 112 is connected between the main board middle section 111 and the main board connecting section 113. The main plate transition section 112 has an obliquely upward shape from the center of the main side sill 111 toward the end. The main board connecting section 113 is used for connecting with a series of suspension devices.

The thickness of the motherboard middle section 111 is greater than the thickness of the motherboard connecting section 113, increasing the supporting strength of the motherboard middle section 111. The thickness of the main board transition section 112 gradually decreases in a direction from the main board middle section 111 toward the main board connection section 113.

One specific way is as follows: the thickness of the motherboard middle section 111 is uniform and extends in the horizontal direction. The thickness of the main board connection section 113 is uniform and extends in the horizontal direction. The main board transition section 112 extends in an obliquely upward direction in a direction from the main board middle section 111 toward the main board connection section 113, and its thickness gradually decreases.

As shown in fig. 8, the secondary side sill panel 12 includes: an auxiliary plate middle section 121, an auxiliary plate transition section 122, and an auxiliary plate connecting section 123. And an auxiliary plate transition section 122 and an auxiliary plate connection section 123 respectively extending from both ends of the auxiliary plate middle section 121.

The auxiliary plate middle section 121 has a height lower than that of the auxiliary plate connection section 123, and the auxiliary plate transition section 122 is connected between the auxiliary plate middle section 121 and the auxiliary plate connection section 123. One specific way is as follows: the sub-panel middle section 121 is uniform in thickness and extends in the horizontal direction. The thickness of the auxiliary plate transition section 122 may be uniform or non-uniform, and extends in an oblique direction.

The auxiliary plate connection section 123 is located at an end of the auxiliary plate transition section 122, and extends in the same direction as the auxiliary plate transition section 122. The vertical projection of the auxiliary board connecting section 123 is located on the main board transition section 122, and the above-mentioned buffer gap 14 is formed among the auxiliary board connecting section 123, the auxiliary board transition section 122 and the main board transition section 112.

The elastic stopper 13 is provided at the sub-panel connecting section 123, and the elastic stopper 13 is in contact with the main-panel transition section 112 when the side member is subjected to a large load.

The elastic stopper 13 has a certain rigidity and a certain elastic buffering capacity. Specifically, the present embodiment provides an elastic stopper 13 including: a stop block and a stop connecting piece. The stop block comprises a metal shell and a rubber block arranged in the metal shell, and the rubber block and the metal shell form an integrated structure through a vulcanization process. One end of the stop connecting piece is connected with the metal shell, and the other end is connected with the auxiliary side beam plate 12.

A first side beam positioning pin 15 for positioning with the cross beam is provided on the bottom surface of the main plate middle section 111, and the first side beam positioning pin 15 extends in a direction perpendicular to the main plate middle section 111. Correspondingly, pin holes are formed in the cross beam, and in the assembling process, the first side beam positioning pin 15 is inserted into the side beam positioning pin hole 211 formed in the cross beam to realize the positioning between the cross beam and the side beam, so that the cross beam and the side beam do not move relatively in the horizontal direction.

The main side beam plate 11 and the auxiliary side beam plate 12 are made of elastic composite fiber material, such as carbon fiber composite material, glass fiber composite material, or carbon fiber and glass fiber composite material. On the basis of the above materials, other composite materials can also be added.

A specific implementation manner is as follows: the number of the first side beam positioning pins 15 is two, and the first side beam positioning pins are sequentially arranged at intervals along the length direction of the main side beam plate 11. The first side rail positioning pin 15 may be made of metal or a material having high hardness. When the first side beam positioning pin 15 is made of metal and the main side beam plate 11 is made of carbon fiber composite material, a metal piece is embedded into the bottom of the main side beam plate 11, the outer end of the metal piece is exposed out of the main side beam plate 11 and forms a flat structure, and the first side beam positioning pin 15 is fixed on the flat structure.

In addition, a second side rail positioning pin 16 is provided on the top surface of the middle portion of the auxiliary side rail 12 for positioning with the secondary suspension mount 8 of the bogie. The second side rail positioning pin 16 extends in a direction perpendicular to the top surface of the middle portion of the auxiliary side rail plate 12. The number of the second side member positioning pins 16 is two, and the second side member positioning pins are sequentially arranged at intervals in the length direction of the auxiliary side member plate 12.

Specifically, the lower surface of the mounting seat top plate 81 in the secondary mounting seat 8 is provided with side beam positioning counter bores 86, and the number and the positions of the side beam positioning counter bores correspond to those of the second side beam positioning pins 16. During assembly, the second side beam positioning pin 16 is correspondingly inserted into the side beam positioning counter bore 86 to position the side beam 1 and the secondary mounting seat 8.

The second side rail positioning pin 16 may be made of metal or a material having a high hardness. When the second side beam positioning pin 16 is made of metal and the auxiliary side beam plate 12 is made of carbon fiber composite material, the positioning metal piece 18 is embedded into the bottom of the auxiliary side beam plate 12, the outer end of the positioning metal piece 18 is exposed out of the upper surface of the auxiliary side beam plate 12 and forms a flat structure, and the second side beam positioning pin 16 is fixed on the flat structure.

Further, the bottom surfaces of the two ends of the main side beam plate 11 are provided with third side beam positioning pins 17 for positioning with the bogie primary suspension device. The third side sill positioning pin 17 extends in a direction perpendicular to the bottom surface of the end portion of the main side sill panel 11. The two ends of the main side beam plate 11 are respectively provided with a third side beam positioning pin 17, and the third side beam positioning pin 17 can be made of metal or a material with higher hardness. When the third side sill positioning pin 17 is made of metal and the main side sill 11 is made of carbon fiber composite material, a metal piece is embedded in the main side sill 11 according to the above scheme, and the part of the metal piece exposed out of the bottom surface of the main side sill 11 is connected with the third side sill positioning pin 17.

The embodiment further provides a concrete implementation manner of the beam 2: fig. 11 is a perspective view of a cross beam provided in an embodiment of the present application, and fig. 12 is a perspective view of a cross beam unit provided in an embodiment of the present application. As shown in fig. 11 and 12, the cross member 2 includes: the two cross beam single bodies are sequentially arranged along the transverse direction and are mutually connected to form the cross beam 2.

The crossbeam monomer includes: a beam main body 21 and a beam connecting arm 22, both extending in the lateral direction. The inner end face of the beam main body 21 facing the other beam main body 21 has a first mounting region and a second mounting region. One end of the beam connecting arm 22 is fixed to a first mounting region and the other end is connected to a second mounting region in another beam cell by a beam connecting means. The crossbeam volume that this embodiment provided is less, easily production, transportation and assembly, can improve assembly efficiency.

The crossbeam adopts cast aluminum alloy or other lightweight materials to make, and the cast mould can adopt the vibration material disk technique to print, reduces weight.

As shown in fig. 12, the width of the end of the cross beam main body 21 toward the other cross beam unit is larger than the width of the middle of the cross beam main body 21. An end face of the beam main body 21 facing the other beam monomer is called an inner end face, and the first mounting region and the second mounting region are respectively located on the inner end face of the beam main body 21, specifically, are arranged at two ends in the width direction of the inner end face.

The first mounting area is spaced from the second mounting area to provide clearance between the two beam connecting arms 22 for receiving a traction center pin in a traction device. The top of the traction center pin is connected with the vehicle body, and the bottom of the traction center pin is inserted into the gap between the two cross beam connecting arms 22 to transmit traction force or braking force between the cross beams.

For the connection between the two cross member units, a rigid connection may be used, for example, by connecting the cross member connecting arm 22 to the other cross member main body 21 by means of bolts. Alternatively, the following scheme provided by this embodiment may also be adopted:

one implementation is as follows: the cross beam connecting pin is adopted, and two ends along the axial direction are respectively called a first end and a second end. Wherein the first end is connected with the cross beam connecting arm 22, and the second end is inserted and fixed in the first pin hole arranged in the second mounting area. The first end of the beam connecting pin and the beam connecting arm 22 can be connected by bolts, welding, pressing, and the like, and the second end of the beam connecting pin fixed in the second pin hole can be connected by welding, pressing, or bolts through a gasket.

The other realization mode is as follows: fig. 13 is a cross-sectional view of a cross beam according to an embodiment of the present application, fig. 14 is a partially enlarged view of a region a in fig. 13, and fig. 15 is an exploded view of two cross beam units according to an embodiment of the present application. As shown in fig. 13 to 15, the cross member connecting device includes: beam connecting pins 23, beam connecting flanges 24, beam connecting nodes 25 and beam connecting washers 26. The beam connection node 25 is an annular structure, and is press-fitted in the first pin hole 210 and fixed to the beam main body 21. In fig. 14, the beam connecting node 25 extends in the left-right direction in the axial direction, and the left end thereof is referred to as a first end and the right end thereof is referred to as a second end.

The second end of the beam connecting pin 23 is press-fitted into the beam connecting node 25 and fixed relative to the beam connecting node 25. A beam connection washer 26 is provided at the second end face of the beam connection pin 23 coaxially with the beam connection pin 23. The outer diameter of the beam connection washer 26 is larger than the inner diameter of the beam connection node 25, and the inner diameter of the beam connection washer 26 is smaller than the outer diameter of the beam connection pin 23. The second end of the beam connecting pin 23 is provided with an internal threaded hole, and a beam connecting bolt 28 is screwed into and fixed to the internal threaded hole of the beam connecting pin 23 after penetrating through the beam connecting washer 26 from the right side, so that the beam connecting pin 23 and the beam connecting node 25 are fixedly connected.

The beam connecting flange 24 has an outer ring and an inner ring, wherein the inner ring is inserted into the first pin hole 210 and abuts against the axial second end of the beam connecting node 25, and the outer ring of the beam connecting flange 24 is connected with the beam main body 21 through a bolt, so that the beam connecting node 25 is fixedly connected with the beam main body 21.

Further, the beam connecting device further comprises: and at least one beam mounting ring 27 disposed in the first pin hole 210 between the left end of the beam connection node 25 and the beam main body 21. During assembly, the beam connection pin 23 is fixed to the beam connection bolt 28 after passing through at least one beam mounting ring 24, the beam connection node 25, and the beam connection washer 26 in this order from the left side. The beam mounting rings 27 are used for adjusting size deviation between the beam connecting node 25 and the beam main body 21, and the number and the thickness of the beam mounting rings 27 can be set according to specific size deviation, so that the beam connecting node 25 can be fixed in the beam main body 21, and vibration caused by relative movement between the beam mounting rings and the beam main body 21 in the vehicle running process is avoided.

The first end of the beam connecting pin 23 is inserted into a second pin hole formed in the end surface of the beam connecting arm 22, and the outer peripheral surface of the beam connecting pin 23 extends radially outward to form a mounting flange connected with a flange provided at the end of the beam connecting arm 22 by a bolt. The radial force between the beam connecting pin 23 and the beam connecting arm 22 is borne by the end of the beam connecting arm 22 inserted into the second pin hole, and the bolt connected with the beam connecting arm 22 is prevented from bearing the shearing force.

The assembly process of the beam connecting device for connecting the beam monomers comprises the following steps: the first end of the beam connecting pin 23 is first bolted to the beam connecting arm 22, and the beam connecting pin 23 is then connected to the beam main body 21. The process of connecting the beam connecting pin 23 with the beam main body 21 is specifically that according to the measured dimensional deviation, a beam mounting ring 27 is firstly installed in a first pin hole 210 of the beam main body 21, the beam connecting node 25 is pressed and installed, then the beam connecting pin 23 is pressed and installed in the beam connecting node 25, a beam connecting gasket 26 is placed, and a beam connecting bolt 28 penetrates through the beam connecting gasket 26 and then is screwed into the beam connecting pin 23 for fixing. Finally, the beam connecting flange 24 is abutted against the right end of the beam connecting node 25 and fixed to the beam main body 21 by bolts.

Axial force, radial force, torsional force and deflection deformation between the two cross beam single bodies 2 are borne by the cross beam connecting nodes.

Further, the beam connection node 25 comprises a metal shell, a metal inner ring and a rubber block arranged between the metal shell and the metal inner ring, and the rubber block, the metal shell and the metal inner ring are vulcanized to form an integrated structure, so that the beam connection node 25 has certain deformation capacity. The beam connecting node 25 provided by the embodiment can generate a certain angle deflection between the two beam single bodies 2. For example: when there is the pit in the orbital below of one side, when the bogie passes through this position, to traditional rigid beam, to the great restriction of both sides wheel, lead to the wheel of pit top unsettled, very easily derail under the condition that receives the transverse force. And the two cross beam single bodies 2 generate flexible deflection through the cross beam connecting node 25, so that wheels above the pits are still attached to the track, and the running safety is improved. Compare in traditional rigid beam, the beam that this embodiment provided is applied to in the bogie, and is better to the adaptability of complicated, abominable circuit, and riding comfort is higher, and the security is also higher.

The middle top surface of the cross beam main body 21 is provided with a side beam positioning pin hole 211 for a first side beam positioning pin 15 arranged at the bottom of the side beam 1 to pass through and limit the horizontal movement of the side beam 1.

Further, the number of the first side frame positioning pins 15 is two. The number of the side member positioning pin holes 211 corresponds to two and is arranged in order along the longitudinal direction. One of the side sill registration pin holes 211 is a circular hole and the other is an oblong hole extending lengthwise along the longitudinal direction. Two first side beam positioning pins 15 at the bottom of the side beam 1 are respectively inserted into the round hole and the long round hole. In the production process, because the existence of factors such as measuring tool, measurement methods, production equipment, the distance between two first side beam locating pins 15 can have the actual deviation within the allowed range, if because actual deviation lead to can't influence the takt with the crossbeam assembly then, and then postpone the production progress. And adopt round hole and slotted hole complex mode, can adapt to the actual deviation between two first side roof beam locating pins 15, normally accomplish the assembly of curb girder 1 and crossbeam 2, improve production efficiency.

The top surface of the beam main body 21 is provided with two secondary mounting platforms 212 protruding from the top surface of the beam main body 21, and the secondary mounting platforms 212 are provided with secondary bolt holes 2121 connected with the mounting seat bolt holes 84 in the secondary suspension mounting seat 8 through bolts. The secondary mounting platform 212 is provided with a secondary positioning hole 2122, one of which is a circular positioning hole and the other is an oblong positioning hole, for positioning in cooperation with the mounting seat positioning protrusion 85 at the bottom of the mounting seat connecting portion 83.

A recessed area formed between the two secondary mount bases 212 is used to receive the side member 1, and the side member registration pin hole 211 is provided in the recessed area.

On the basis of the technical scheme, the bogie can be improved as follows: as shown in fig. 2 and 5, a lower transition plate 871 is provided between the side member 1 and the cross member 2 to cushion the force between the side member 1 and the cross member 2. Especially, when the side member 1 is made of an elastic fiber composite material, the lower transition plate 871 can reduce the abrasion of the side member 1 and ensure the strength thereof.

Specifically, the lower transition plate 871 may be a plate-shaped structure parallel to the horizontal plane. Furthermore, two side edges of the lower transition plate 871 extend upwards to two sides of the side beam 1 to wrap the side beam 1. The lower transition plate 871 is correspondingly provided with a through hole for the first side beam positioning pin 15 to pass through.

Further, an upper transition plate 872 is provided between the side member 1 and the secondary mount 8. The force between the side member 1 and the secondary mount 8 is buffered. Especially, when the side member 1 is made of an elastic fiber composite material, the upper transition plate 872 can reduce abrasion of the side member 1 and ensure the strength thereof.

Specifically, the upper transition plate 872 may be a plate-like structure parallel to the horizontal plane. Further, two side edges of the upper transition plate 872 extend downward to two sides of the side beam 1 to wrap the side beam 1. The upper transition plate 872 is correspondingly provided with a through hole for the second side beam positioning pin 16 to pass through.

Fig. 16 is a schematic structural diagram of a bogie provided with a secondary suspension device according to an embodiment of the present invention. Further, the upper surface of the mount top plate 81 is used for connecting with a secondary suspension device. The secondary suspension device can be a rubber pile, a steel spring or an air spring. In the present embodiment, the air spring 810 is used as a secondary suspension device, and as shown in fig. 16, a secondary mounting portion 88 is provided on the upper surface of the mounting seat top plate 81, and is of a ring structure protruding from the mounting seat top plate 81, and the center line thereof extends in the vertical direction. The bottom of the air spring 810 is inserted into the secondary mounting portion 88 to achieve horizontal position limitation.

Fig. 17 is a schematic structural diagram of a secondary suspension mounting base connected to a traction motor through a motor balancing pole according to an embodiment of the present application. As shown in fig. 3, 4 and 17, the secondary suspension mounting base 8 is further provided with a motor mounting portion 89 for connecting one end of a motor balancing rod 92, and the other end of the motor balancing rod 92 is connected with a traction motor arranged on the wheel set. The traction motor is a direct drive motor 91, is connected with the axle of the wheel pair, and directly drives the axle to rotate so as to drive the wheels to rotate.

Fig. 18 is a schematic connection diagram of a direct drive motor and an axle provided in the embodiment of the present application, fig. 19 is a schematic cross-sectional view of the direct drive motor and the axle provided in the embodiment of the present application, and fig. 20 is a partially enlarged schematic view of a region B in fig. 19. As shown in fig. 18 to 20, the axle boxes 33 are attached to both end portions of the axle 31 by seal bearings 333. The direct drive motor 91 has a stator 911, a rotor 913, and an end cover 912. Rotor 913 is attached to axle 31, stator 911 is attached to end cap 912, and end cap 912 is connected to axle case 33.

The dust-proof retainer 93 has one end connected to the hermetic bearing 333 and the other end connected to the end cap 912, and forms a labyrinth seal with the end cap 912. The axial direction of the axle 31 is parallel to the lateral direction of the vehicle body. The axle 31 has two ends in the axial direction thereof, and the two ends of the axle 31 are respectively provided with wheels 32, and the wheels 32 are used for rolling contact with the rail to realize the running function of the rail vehicle.

The axle boxes 33 are provided at both ends of the axle 31, the axle boxes 33 are provided near the wheels, and the axle boxes 33 are provided on the inner sides of the two wheels facing each other. The axle boxes 33 are also connected to the cross-beams by single-pull rods to transfer longitudinal and lateral loads.

The direct drive motor 91 has a stator 911, a rotor 913, and an end cover 912. Rotor 913 is attached to axle 31. Rotor 913 may have an interference fit with axle 31. Rotor 913 is rotatable with axle 31. Stator 911 is mounted to end cap 912. Stator 911 may be supported by the inner edge of end cap 912. Stator 911 is secured to end cap 912 by a plurality of fixing bolts. Illustratively, the end cover 912 includes a cover plate, an inner edge of the cover plate is provided towards the inner side of the other end cover 912, the outer diameter of the inner edge is smaller than that of the cover plate, the end of the stator 911 is sleeved on the inner edge, and a plurality of fixing bolts distributed at intervals penetrate through the cover plate and the stator 911 to screw the stator 911 with the cover plate, so that the stator 911 and the end cover 912 are reliably detachably connected.

The end cap 912 of the direct drive motor 91 is also connected to the axle housing 33 by a plurality of spaced apart anchor bolts. The anchor bolts on end cap 912 that are coupled to axle housing 33 are located at the inner race of the anchor bolts that are coupled to stator 911, i.e., the anchor bolts on end cap 912 that are coupled to axle housing 33 are closer to the center of end cap 912 than the anchor bolts that are coupled to stator 911. At least one adjusting shim is arranged between the end cover 912 and the axle box 33, the number of adjusting shims can be set according to actual needs, and the adjusting shim can be used for adjusting the gap between the axle box 33 and the end cover 912.

Stator 911 is secured to axle housing 33 with end cap 912. There is relative rotation between the stator 911 and the rotor 913. An electromagnetic torque can be generated between the stator 911 and the rotor 913, so that the rotor 913 can rotate the axle 31. Illustratively, the stator 911 includes a housing and a pole or armature core mounted to the housing, the armature core being provided with an armature winding. For example, the stator 911 may include a housing and magnetic poles mounted with the housing; accordingly, the rotor 913 includes an armature core provided with an armature winding. Alternatively, the stator 911 includes a housing and an armature core having an armature winding mounted thereon, the armature core having the armature winding mounted thereon being mounted on the housing; accordingly, the rotor 913 includes magnetic poles.

The axle housing 33 is provided to the axle 31 through a seal bearing 333 so that there can be relative rotation between the axle 31 and the axle housing 33. The sealed bearing 333 includes an inner ring, a roller, an outer ring, and a seal. The roller sets up between inner circle and outer lane, and the junction of outer lane and inner circle is provided with the sealing member, forms labyrinth seal structure between outer lane, sealing member and the inner circle to effectively avoid self lubricating oil to reveal get into and directly drive in the motor 91, and can avoid directly driving particulate matters such as dust that the motor 91 during operation produced and get into in the sealed bearing 333, thereby do benefit to the life who prolongs sealed bearing 333 and directly drive motor 91, reduce rail vehicle's maintenance cost.

A limit ring is arranged at one end of the axle box 33 facing the end cover 912; one end of end cover 912 facing axle box 33 is provided with a mounting boss, which is inserted into the limit ring. Therefore, when the direct-drive motor 91 is assembled, the end cover 912 of the direct-drive motor 91 is positioned relative to the axle box 33, the end cover 912 is screwed with the axle box 33 through the fixing bolt, and the connection reliability of the direct-drive motor 91 and the axle box 33 is ensured.

Further, as shown in fig. 20, a dust-proof retainer 93 is provided between the seal bearing 333 and the end cap 912, one end of the dust-proof retainer 93 abuts against the seal bearing 333, and the other end of the dust-proof retainer 93 and the end cap 912 form a labyrinth seal structure. Therefore, a sealing structure is also formed between the sealing bearing 333 and the end cover 912, so that the lubricating oil in the sealing bearing 333 is further effectively prevented from leaking into the direct drive motor 91, and particulate matters such as dust generated during the operation of the direct drive motor 91 can be prevented from entering the sealing bearing 333. Therefore, the service lives of the sealing bearing 333 and the direct drive motor 91 are further prolonged, and the maintenance cost of the railway vehicle is reduced.

In one possible implementation, the dust-proof retainer 93 includes: a mounting body 931, an extension ring 932, and a plurality of annular seal teeth 933. The head end of the mounting body 931 abuts against the seal bearing 333, and the tail end of the mounting body 931 abuts against the end cap 912 and the axle 31. Extension ring 932 is disposed at the aft end of mounting body 931 and is located on the inboard side of endcap 912 facing away from axle housing 33. A plurality of annular seal teeth 933 are arranged on one side of the extension ring 932 facing the inner side wall of the end cover 912 and are respectively matched with tooth grooves arranged on the inner side wall of the end cover 912, so that a labyrinth seal is formed between the end cover 912 and the dust-proof retainer ring 93.

In a specific implementation, the head end of the mounting body 931 may abut against the outer end surface of the sealing bearing 333, or the head end of the mounting body 931 abuts between the sealing bearing 333 and the axle 31, so as to achieve the sealing connection between the dust-proof retainer 93 and the sealing bearing 333.

The mounting body 931 may be sleeved on a corresponding position of the axle 31. The matching section of the axle 31 matched with the dustproof retainer ring 93 comprises a first part and a second part, wherein the outer diameter of the first part is smaller than that of the second part; the mounting body 931 is shaped to fit the mating segment, the first segment of the mounting body 931 fits into the first portion, and the tail end of the mounting body 931 fits into the second portion. Wherein, the first part and the second part of the matching section of the axle 31 can be smoothly transited; the head end and the tail end of the mounting body 931 are smoothly transitioned.

The aft end of the mounting body 931 is provided with an upwardly extending extension ring 932, and the extension ring 932 is located on the inboard side of the endcap 912 facing away from the sealed bearing 333. One side of the extension ring 932 facing the inner side wall of the end cover 912 is provided with a plurality of annular seal teeth 933 distributed at intervals, and the annular seal teeth 933 are respectively matched with tooth grooves 912a arranged on the inner side wall of the end cover 912, so that a labyrinth seal is formed between the end cover 912 and the dust-proof retainer ring 93. Wherein the extension ring 932 extends a set distance in a radial direction thereof to facilitate placement of the annular seal tooth 933. Annular seal teeth 933 extend a set distance axially therealong to facilitate the formation of a longer flow path.

The annular seal teeth 933 of the dust-proof retainer ring 93 and the tooth grooves 912a of the end cover 912 form a radial staggered tooth type labyrinth seal structure. In general, in the labyrinth seal structure, the flow passage frictional resistance is related to the length and the cross-sectional shape of the flow passage. Specifically, the flow channel frictional resistance is proportional to the length of the flow channel, and the flow channel frictional resistance is proportional to the cross-sectional area.

In the example, a radial rectangular tooth staggered tooth labyrinth with two pairs of staggered teeth can be adopted, so that the length of a flow passage can be increased, the friction resistance can be increased, and the movement speed of lubricating oil or dust in the labyrinth sealing structure can be reduced.

In this example, a wide flow passage and a narrow flow passage are arranged in a staggered manner, so as to further reduce the movement speed of the lubricating oil or the dust in the labyrinth seal structure. Taking lubricating oil as an example, under the condition of a certain flow rate, the flow rate and the sectional area of the lubricating oil are in inverse proportion, the flow rate of the lubricating oil is increased when the lubricating oil passes through a narrow flow passage, a wide flow passage is arranged behind the narrow flow passage, the sectional area of the wide flow passage is increased, and the flow rate is reduced, so that the flow passage is circularly changed in a narrow and wide mode until the flow rate of the lubricating oil is zero, and the sealing purpose is achieved.

Illustratively, the annular seal tooth 933 has two first surfaces extending axially therealong and a second surface extending radially therealong, the second surface being connected to the two first surfaces, the flow channel formed between the first surface and the corresponding sidewall of the tooth slot 912a being a relatively wide flow channel, and the flow channel formed between the second surface and the corresponding sidewall of the tooth slot 912a being a relatively narrow flow channel. Extension ring 932 has a third surface that is coupled to the first surface of annular seal tooth 933, and the flow path formed between the third surface and the inner sidewall of end cap 912 is a relatively narrow flow path. So, narrow and small runner and the crisscross setting of broad runner, that is, the runner is narrow and small, the reciprocating change of broad circulation, reduces the velocity of motion of lubricating oil or dust in labyrinth seal structure, reaches sealed purpose.

The operation principle of the labyrinth seal structure of the seal bearing 333 may be similar to that of the labyrinth seal structure formed by the dust-proof retainer ring 93 and the end cover 912, and details are not repeated in this embodiment.

In the present example, a labyrinth seal structure formed by the end cover 912 and the dustproof retainer ring 93 can prevent dust impurities generated in the working process of the direct drive motor 91 from entering the axle box 33 to cause bearing damage, and prolong the service life of the bearing; a small amount of grease or oil can be prevented from leaking into the direct drive motor 91 by the labyrinth structure of the seal bearing 333.

Fig. 21 is a perspective view of a motor balance bar according to an embodiment of the present application, fig. 22 is a cross-sectional view of a connection between a bar body and a node of the motor balance bar according to the embodiment of the present application, and fig. 23 is an exploded view of the motor balance bar according to the embodiment of the present application. As shown in fig. 21, 22, 23, and 17, the bogie further includes: one end of the motor balancing rod 92 is flexibly connected with the stator 911 of the direct drive motor 91, and the other end of the motor balancing rod 92 is flexibly connected with the secondary suspension mounting base 8. In specific implementation, the direct drive motor 91 can be connected to the secondary suspension mounting base 8 through two motor balancing rods 92; one end of each of the two motor balance rods 92 is connected to the middle of the direct drive motor 91, and the other end of each of the two motor balance rods 92 is connected to the secondary suspension mounting seats 8 at the two ends of the cross beam, so that the connection reliability of the direct drive motor 91 and the cross beam is ensured.

The motor balancing lever 92 includes: a lever body 921 and two resilient nodes 922. The two elastic nodes 922 are respectively arranged at two ends of the rod body 921; one of the elastic nodes 922 is connected to the stator 911 of the direct drive motor 91, and the other elastic node 922 is connected to the secondary suspension mounting base 8.

The shaft 921 may be made of carbon fiber material. The carbon fiber material has the advantages of high modulus, good design, compositability, light weight, high strength and the like, and is high-temperature resistant and corrosion resistant. Therefore, the rod body 921 made of the carbon fiber material in this example has sufficient strength and high material utilization.

The rod body 921 may be a variable section rod. The cross-sectional area of the end portion of the rod body 921 is larger than the cross-sectional area of the middle portion of the rod body 921. In this example, by setting the cross-sectional area of the end portion of the rod body 921 to be relatively large, the strength of the end portion of the rod body 921 is made high, which is beneficial to ensuring the connection reliability of the driving motor and the cross beam; the middle part of the rod body 921 is arranged, so that the rod body 921 can adapt to the distance between the direct drive motor 91 and the cross beam; by providing a relatively small cross-sectional area of the middle portion of the lever body 921, it is beneficial to reduce the cost of the motor balancing lever 92. Wherein, the length in the middle part of the pole body 921 can be set according to actual need.

The outer surface of the middle of the node 922 protrudes out of the two end parts of the node 922; the middle part of the node 922 is connected to the rod body 921; the middle of node 922 has a metal and rubber vulcanized elastic portion to achieve an elastic connection. The outer ring in the middle of the node 922 is in transition fit with the rod body 921, and the middle of the node 922 can be pressed into the mounting hole in the end part of the rod body 921 in a press-fitting mode. The two ends of node 922 are connected to stator 911 of direct drive motor 91 or to secondary suspension mount 8.

The end part of the node 922 at one end of the rod body 921 can be connected to the stator 911 of the direct drive motor 91 through a fixing bolt and an adjusting shim, and the number of the adjusting shims is adjustable; and/or, the end of node 922 may also be connected to stator 911 of direct drive motor 91 by a threaded pin. The connection of the end of the node 922 at the other end of the rod 921 to the secondary suspension mount 8 may be similar to the connection of the node 922 to the stator 911 of the direct drive motor 91.

Further, a metal retainer ring 923 is embedded in the end of the rod body 921; the metal collar 923 has mounting holes to mount the nodes 922. The metal retainer ring 923 is provided with a positioning boss 923a along its axial one end, and the positioning boss 923a is arranged on the inner hole wall of the mounting hole of the metal retainer ring 923 and extends inwards. The positioning boss 923a is located at one end of the middle portion of the node 922 and is used for limiting the middle portion of the node 922 in the installation hole of the metal retainer ring 923. The other end of the metal retainer ring 923 is provided with a clamping groove 923b, and the clamping groove 923b is arranged on the inner hole wall of the mounting hole of the metal retainer ring 923. The motor balancing bar 92 further includes: spring rand 924, spring rand 924 card is located in the draw-in groove 923b of metal retaining ring 923, spring rand 924 is located the middle part of node 922 and deviates from the one end of location boss 923a, spring rand 924 is fixed a position the middle part of node 922 in metal retaining ring 923 with location boss 923a jointly to break away from in the mounting hole of metal retaining ring 923 from the middle part of node 922, thereby ensure the reliability of being connected of node 922 and the body of rod 921, ensure directly drive motor 91 and the reliability of being connected of secondary suspension mount pad 8.

When assembling motor balancing pole 92, in the mounting hole of the middle part pressure equipment of node 922 to the body of rod 921 tip metal retaining ring 923 earlier, and make the middle part of node 922 offset with the location boss 923a of metal retaining ring 923, then go into the draw-in groove 923b of metal retaining ring 923 with spring rand 924 card. Wherein, the spring clip 924 is an open and elastic clip to facilitate the installation of the spring clip 924.

In this example, the direct drive motor 91 is flexibly connected with the secondary suspension mounting base 8 through the motor balancing rod 92, so that vibration and impact between the axle 31 and the secondary suspension mounting base 8 can be buffered.

The embodiment also provides a railway vehicle, which adopts the bogie provided by any one of the contents. The railway vehicle comprises a plurality of carriages which are connected in series, and a bogie is arranged below the carriages. The rail vehicle provided by the embodiment has the same technical effects as the bogie.

Claims

1. A bogie, comprising:

a cross member extending in a transverse direction;

a side member extending in a longitudinal direction; the number of the side beams is two, the two side beams are arranged side by side and respectively penetrate through one installation channel;

the side member includes:

the main side beam plate is made of elastic composite fiber materials;

the auxiliary side beam plate is made of elastic composite fiber materials and is stacked above the main side beam plate; the bottom surfaces of the two ends of the auxiliary side beam plate and the top surface of the main side beam plate are provided with buffer gaps;

the elastic stop is arranged at the end part of the auxiliary side beam plate and is positioned in the buffer gap; when the middle part of the side beam bears a first vertical load, a gap is formed between the elastic stop and the top surface of the main side beam plate; when the middle part of the side beam bears a second vertical load, the main side beam plate and the auxiliary side beam plate are elastically deformed until the elastic stop is contacted with the top surface of the main side beam plate; the second vertical load is greater than the first vertical load.

2. The bogie of claim 1, further comprising: two series of mounting platforms are respectively arranged on the two transverse sides of the position, to be provided with the side beam, of the cross beam, and the two series of mounting platforms protrude out of the upper surface of the cross beam; the area between the secondary mounting platforms is used for mounting the side beam; the secondary suspension mounting base is connected to the secondary mounting table.

3. The truck of claim 2 wherein the secondary suspension mount comprises:

the top surface of the mounting seat top plate is used for mounting a secondary suspension device;

the mounting seat side plates are vertically arranged and longitudinally extend, the number of the mounting seat side plates is two, and the top ends of the mounting seat side plates are respectively connected to two opposite edges of the mounting seat top plate; the bottom end of the mounting seat side plate is bent outwards to form a mounting seat connecting part, and the mounting seat connecting part is fixedly connected with the secondary mounting table.

4. The truck of claim 1 wherein the side sill has a first side sill alignment pin disposed on a bottom surface of the side sill extending in a direction perpendicular to the bottom surface of the side sill middle; and the first side beam positioning pin is inserted into a side beam positioning pin hole correspondingly formed in the cross beam for positioning.

5. The truck of claim 4 wherein the number of side sill registration pin holes is two and spaced longitudinally; one side beam positioning pin hole is a round hole, and the other side beam positioning pin hole is an oblong hole extending along the longitudinal direction.

6. The truck of claim 1 wherein the top center of the side beam is provided with a second side beam locating pin extending in a direction perpendicular to the top center of the side beam; and the second side beam positioning pin is inserted into a side beam positioning counter bore formed in the secondary mounting seat for positioning.

7. The bogie according to claim 4 or 5, further comprising:

the lower transition plate is arranged between the side beam and the cross beam; two side edges of the lower transition plate extend upwards to two sides of the side beam; the lower transition plate is correspondingly provided with a through hole for the first side beam positioning pin to pass through;

the upper transition plate is arranged between the side beam and the secondary mounting seat; two side edges of the upper transition plate extend downwards to two sides of the side beam; and the upper transition plate is correspondingly provided with a through hole for the second side beam positioning pin to pass through.

8. The truck of claim 1, wherein the main side rail panel comprises: the main board middle section, and a main board transition section and a main board connecting section which respectively extend from two ends of the main board middle section;

the height of mainboard middle section is less than the height of mainboard linkage segment, and the mainboard changeover portion is connected between mainboard middle section and mainboard linkage segment.

9. The bogie of claim 8, wherein the secondary side beam panel comprises: the auxiliary plate comprises an auxiliary plate middle section, and an auxiliary plate transition section and an auxiliary plate connecting section which respectively extend from two ends of the auxiliary plate middle section;

the height of the auxiliary plate middle section is lower than that of the auxiliary plate connecting section, and the auxiliary plate transition section is connected between the auxiliary plate middle section and the auxiliary plate connecting section; the elastic stop is arranged at the connecting section of the auxiliary plate.

10. The bogie of claim 9, wherein a vertical projection of the secondary plate connecting section lies on the main plate transition section, and the secondary plate connecting section, the secondary plate transition section and the main plate transition section form the buffer gap therebetween.

11. The bogie of claim 1, wherein the beam comprises two beam cells; the beam unit includes:

a beam main body; the inner end face of the beam main body facing to the other beam single body is provided with a first mounting area and a second mounting area; a side beam mounting interface used for being assembled with a side beam of a bogie is arranged on the top surface of the middle part of the cross beam main body;

and the beam connecting arm extends along the direction parallel to the beam main body, one end of the beam connecting arm is fixed to the first mounting area in the beam main body, and the other end of the beam connecting arm is connected to the second mounting area of the beam main body in the other beam monomer through the beam connecting device.

12. The bogie according to claim 11, wherein the width of the end of the beam body facing the other beam cell is greater than the width of the middle of the beam body; the first mounting area and the second mounting area are respectively positioned at two ends of the inner end surface of the beam main body along the width direction; a gap for accommodating a bogie traction center pin is formed between the two beam connecting arms.

13. The truck of claim 12 wherein the beam attachment means comprises: the beam connecting pin, the beam connecting flange, the beam connecting node and the beam connecting washer;

the first end of the cross beam connecting pin is connected with the cross beam connecting arm;

the beam connecting node is of an annular structure and is pressed in the first pin hole; the second end of the beam connecting pin is pressed in the beam connecting node; the beam connecting gasket is arranged at the second end face of the beam connecting pin and is coaxial with the beam connecting pin; the outer diameter of the beam connecting washer is larger than the inner diameter of the beam connecting node, and the inner diameter of the beam connecting washer is smaller than the outer diameter of the beam connecting pin;

the second end of the beam connecting pin is provided with an internal threaded hole, and a bolt penetrates through the beam connecting washer and is fixed in the internal threaded hole of the beam connecting pin;

the inner ring of the beam connecting flange is inserted into the first pin hole and abuts against the axial end part of the beam connecting node; the outer ring of the beam connecting flange is connected with the beam main body through a bolt.

14. A rail vehicle, comprising: a bogie as claimed in any one of claims 1 to 13.