WO2022205914A1

WO2022205914A1 - Axle box suspension device, bogie, and railway wagon

Info

Publication number: WO2022205914A1
Application number: PCT/CN2021/128926
Authority: WO
Inventors: 许善超; 许然荻; 张文龙; 李超; 徐世峰
Original assignee: 中车齐齐哈尔车辆有限公司
Priority date: 2021-03-29
Filing date: 2021-11-05
Publication date: 2022-10-06
Also published as: CN112918502A

Abstract

An axle box suspension device, comprising an axle box (1), guide frames (2, 3) and a spring (4). The guide frames (2, 3) are located on two sides of the axle box (1); the axle box (1) is provided with a spring bearing portion (1-1); the spring (4) is located between the guide frames (2, 3) and the spring bearing portion (1-1); two swing blocks (6) and a spring vibration damping gear (5) are provided between at least one guide frame (2, 3) and the spring (4); the two swing blocks (6) are spaced apart side by side along the direction parallel to the axis of the axle box (1); each swing block (6) is tilted, the upper end thereof is rotatably matched with the guide frames (2, 3), and the lower end thereof inclines toward the axle box (1) and is rotatably matched with the spring vibration damping gear (5); a first friction surface (5-1) of the spring vibration damping gear (5) and a second friction surface (1-2) of the axle box (1) form a friction pair that can move relatively. Thus, the dynamic performance of a vehicle can be improved and the continuous stability of the dynamic performance of the vehicle can be ensured. Also provided are a bogie and a railway wagon.

Description

Axle box suspensions, bogies and railway wagons

This application claims the priority of the invention patent application filed with the China Patent Office on March 29, 2021, the application number is 202110333865.X, and the invention name is "axle box suspension device, bogie and railway freight car", the entire content of which is incorporated by reference in this application.

technical field

The invention relates to the technical field of rail vehicles, in particular to an axle box suspension device of a railway freight car. The invention also relates to a bogie provided with the axlebox suspension device, and a railway freight car provided with the bogie.

Background technique

A railway freight car generally includes a car body, a bogie, a braking device, a coupler buffer device, etc. The function of the bogie is to support the car body, guide the vehicle to travel along the track, and bear various loads from the car body and the line. Therefore, the bogie is an important part of the railway freight car and the core component that affects the dynamic performance of the vehicle.

Railway freight car bogies are divided into two categories: welded frame bogies and cast steel three-piece bogies. Among them, welded frame bogies are mainly composed of frame, basic braking device, axle box suspension vibration damping device and elastic side bearing, etc. The axle box suspension device is composed of the wheelset and the axle box, spring, wedge and bearing saddle installed on the wheelset. The axle box suspension device is strongly related to the dynamic performance of the vehicle and directly determines and affects the dynamics of the vehicle. performance.

As shown in Figure 1, a typical Y25 frame bogie, its axle box suspension device is composed of spring 1', spring cap 2', lifting ring 3' and axle box 4', etc., and one side of the wheel set is a guide frame Rigid positioning, the opposite side adopts the vibration damping device of the suspension ring 3' and the spring cap 3'. One end of the suspension ring 3' is installed on the protruding cantilever shaft of the guide frame 5', and the other end is installed on the protruding cantilever shaft of the spring cap 2'. , the raised cantilever shafts are welded to the pedestal 5' and the spring cap 2' respectively.

This structure mainly has the following disadvantages:

1) The lifting ring 3' is installed on the cantilever shaft, and the cantilever shaft is a welded structure, the structural force is not ideal, and the manufacturability and reliability are poor.

2) After the friction surface matched with the axle box 4' is worn, the angle of the lifting ring 3' becomes smaller, which will lead to the decrease of the vibration damping performance.

3) After the lifting ring 3' and the cantilever shaft are worn, the angle of the lifting ring 3' becomes smaller, which will also lead to a decrease in the vibration reduction performance. 4) The structure is complex, the number of parts is too large, and the manufacturing is difficult.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an axle box suspension device. The device can improve vehicle dynamics and ensure continuous stability of vehicle dynamics.

Another object of the present invention is to provide a bogie provided with the axlebox suspension device.

Another object of the present invention is to provide a railway freight car provided with the bogie.

In order to achieve the above purpose, the present invention provides an axle box suspension device, the axle box suspension device includes an axle box, a guide frame and a spring, the guide frame is located on both sides of the axle box, and the axle box is provided with a spring bearing. The spring is located between the guide frame and the spring bearing part, and at least one of the guide frame and the spring is provided with two swing blocks and spring damping gears; the two swing blocks are parallel to the The directions of the axes of the axle boxes are distributed side by side at intervals, the upper end of each swing block is rotatably matched with the guide frame, and the lower end of each swing block is rotatable with the spring damping gear The swing block is arranged obliquely and has an included angle with the vertical direction, and its lower end is biased towards the axle box; the side surface of the spring damping gear is provided with a first friction corresponding to the axle box. The first friction surface presses against the second friction surface on the side surface of the axle box through the first friction surface, and the first friction surface and the second friction surface form a friction pair that can move relatively.

Preferably, the two ends of the swing block are respectively provided with cylindrical surfaces for support, and the inner top of the guide frame and the top of the spring damping gear are respectively provided with two concave arc surfaces; The upper end of the swing block is rotated and matched with the corresponding concave arc surface on the guide frame through the cylindrical surface, and the lower end of each swing block is connected with the corresponding concave circle on the spring damping gear through the cylindrical surface. Arc surface rotation fit;

And/or, both ends of each of the swing blocks are provided with pin shaft holes, the upper end of which is rotatably connected to the guide frame through a pin shaft, and the lower end of which is rotatably connected to the spring damping gear through a pin shaft.

Preferably, the spring damping gear is provided with a friction plate standing on the side, the vertical surface of the friction plate forms the first friction surface, and the vertical surface of the side surface of the axle box forms the second friction surface, The first friction surface and the second friction surface can move relatively along the vertical direction; or,

The spring damping gear is provided with a lateral friction plate, the vertical surface of the friction plate is provided with a groove, a wear plate is embedded in the groove, and the vertical surface of the wear plate forms the first friction plate. A friction surface, the vertical surface of the side surface of the axle box forms the second friction surface, and the first friction surface and the second friction surface can move relatively along the vertical direction.

Preferably, the spring includes an outer spring and an inner spring, the main body of the spring damping gear is provided with a hole that penetrates up and down in the middle, and the two concave arc planes are symmetrically distributed in the hole. On both sides of the spring damper, the bottom of the spring damping gear is placed on the upper plane of the outer spring.

Preferably, the main body of the spring damper is in the shape of a disc, the top of which has a first top surface and a second top surface, the second top surface is higher than the first top surface and the second top surface is higher than the first top surface. The surface is on the side adjacent to the first friction surface, a transition slope is formed between the first top surface and the second top surface, and the two concave arc surfaces of the spring damping gear are located on the transition slope.

Preferably, the guide frame provided with the swing block and the spring damping gear is in the shape of a cover with an opening downward, and a downwardly extending spring support part is provided inside the guide frame at a middle position, and the spring support part passes through the The hole of the spring damping gear is supported on the inner spring.

Preferably, the two concave arc surfaces on the inner top of the pedestal are symmetrically located on both sides of the spring support portion, and a swing block is formed between the spring support portion and the inner wall of the pedestal frame. Cavity for swinging.

Preferably, the guide frame is provided with a side wall portion extending downward on a side adjacent to the axle box, the side wall portion is provided with a frame opening for the spring damping gear to pass laterally, and the spring A movable gap is left between the damping gear and the frame opening.

Preferably, the lateral projection of the swing block is a dumbbell shape with two ends larger than the middle size or a shape of equal width with the two ends having the same size as the middle size.

Preferably, only two of the swing blocks and the spring damping gears are arranged between only one of the guide frames and its spring.

In order to achieve the above-mentioned other object, the present invention provides a bogie, including a frame, a suspension device, a wheelset and a side bearing, and the suspension device includes the axle box suspension device described in any of the above, and the axle box suspension device The top surface of the pedestal frame and the lower cover plate of the side beam of the frame are welded into an integral structure.

Preferably, it is a two-axle or multi-axle bogie, the left and right end wheel sets are provided with the axle box suspension device, and the two swing blocks and the spring damping gear of the axle box suspension device are located in the The inside or outside of the wheelset at the left and right ends.

In order to achieve the above-mentioned still another object, the present invention provides a railway freight car, comprising a bogie, a power system and a car box arranged on the bogie, wherein the bogie is a bogie provided with the above axle box suspension device.

The axle box suspension device provided by the present invention is provided with a spring damping gear, and two swing blocks are arranged between the guide frame and the spring damping gear. The force is transmitted to the guide frame, and at the same time, due to the inclined angle between the two swing blocks and the vertical direction, the spring damping gear can generate a horizontal component force. The first friction surface is pressed against the second friction surface of the axle box, so that the friction force generated by the relative displacement can play a damping effect and realize the vibration reduction function. The structure of the guide frame with built-in two inclined swing blocks can not only provide the vehicle vibration damping function, but also realize the longitudinal positioning function of the wheelset. It has the advantages of simple structure, high reliability, good positioning effect, low manufacturing difficulty and number of parts. less, the vibration reduction effect does not decrease after wear and so on.

The bogie and the railway freight car provided by the present invention are provided with the axle box suspension device. Since the axle box suspension device has the above technical effects, the bogie and the railway freight car provided with the axle box suspension device should also have the corresponding axle box suspension device. technical effect.

Description of drawings

Fig. 1 is a structural schematic diagram of a typical Y25 frame bogie;

2 is a schematic structural diagram of a three-axle frame bogie disclosed in the first embodiment of the present invention;

Figure 3 is a partial cross-sectional view of the right end wheelset in Figure 2;

Figure 4 is a side view of the pedestal shown in Figure 3;

Fig. 5 is the left side view of Fig. 4;

Fig. 6 is the top view of Fig. 4;

7 is a schematic structural diagram of the pedestal shown in FIG. 3 viewed from the bottom after being turned over;

Fig. 8 is the structural schematic diagram of the swing block shown in Fig. 3;

Fig. 9 is the left side view of the swing block shown in Fig. 8;

Figure 10 is an isometric view of the spring damper shown in Figure 3;

Figure 11 is a side view of the spring damping gear shown in Figure 10;

Fig. 12 is the top view of Fig. 11;

Fig. 13 is the left side view of Fig. 11;

Fig. 14 is the structural schematic diagram of the axle box shown in Fig. 3;

Figure 15 is a top view of the axle box shown in Figure 14;

16 is a schematic structural diagram of a three-axle frame bogie disclosed in the second embodiment of the present invention;

Figure 17 is a partial cross-sectional view of the left end wheelset in Figure 16;

18 is a schematic structural diagram of the axle box suspension device disclosed in the third embodiment of the present invention;

19 is a schematic structural diagram of the axle box suspension device disclosed in the fourth embodiment of the present invention;

20 is a schematic structural diagram of the axle box suspension device disclosed in the fifth embodiment of the present invention;

21 is a schematic structural diagram of the axle box suspension device disclosed in the sixth embodiment of the present invention;

22 is a schematic structural diagram of the axle box suspension device disclosed in the seventh embodiment of the present invention;

23 is a schematic structural diagram of a swing block disclosed in an eighth embodiment of the present invention;

FIG. 24 is a left side view of the swing block shown in FIG. 23 .

In Figure 1:

Spring 1' Spring cap 2' Lifting ring 3' Axle box 4' Lead frame 5'

In Figures 2 to 24:

1. Axle box 1-1. Spring bearing part 1-2. Second friction surface 2. First lead frame 2-1. Concave arc surface 2-2. Side wall part 2-3. Frame mouth 2-4 Spring support 3. Second guide frame 4. Spring 4-1. Outer spring 4-2. Inner spring 5. Spring damping gear 5-1. First friction surface 5-2. Concave arc surface 5-3 .Hole position 5-4. First top surface 5-5. Second top surface 5-6. Transition slope 5-7. Friction plate 5-8. Groove 6. Swing block 6-1. Cylindrical surface 6-2 .pin hole 7.frame 8.wear plate 9.bearing saddle 10.rubber pad 11.suspension 12.wheel set 13.side bearing

Detailed ways

In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In this article, terms such as "up, down, left, right" are established based on the positional relationship shown in the accompanying drawings, and the corresponding positional relationship may also change according to the different drawings, and the description texts have opposite directions. For the part of the definition, the direction of the literal definition is preferred, and therefore, it should not be construed as an absolute limitation on the scope of protection; moreover, relational terms such as "first" and "second" are only used to associate a to distinguish another component with the same name without necessarily requiring or implying any such actual relationship or order between the components.

Please refer to FIG. 2 and FIG. 3 , FIG. 2 is a schematic structural diagram of a three-axle frame bogie disclosed in the first embodiment of the present invention; FIG. 3 is a partial cross-sectional view of the right wheelset in FIG. 2 .

As shown in the figure, in a specific embodiment, the structure of the axle box suspension device is described by taking a three-axle frame bogie as an example. The bogie is mainly composed of a frame and three wheel sets. As shown in FIG. 2 In terms of orientation, they are the left wheelset, the middle wheelset and the right wheelset respectively. The left and right wheelsets use the axle box suspension device shown in Figure 3, and the axles of the left and right wheelsets are The box suspension device is in a mirror-symmetrical relationship.

As shown in Figure 3, the axle box suspension device of the right wheelset is mainly composed of an axle box 1, a first guide frame 2, a second guide frame 3, a spring 4, a spring damping gear 5, and a swing block 6, etc.

The first lead frame 2 and the second lead frame 3 are welded to the lower plane of the side beam of the frame 7, and are located on both sides of the axle box 1. The bottom of the axle box 1 has spring bearing parts 1-1 extending laterally to the left and right, Springs 4 are respectively provided between the first lead frame 2 and the second lead frame 3 and the spring bearing portion 1 - 1 , and the springs 4 are placed on the spring bearing portions 1 - 1 on both sides of the axle box 1 .

Among them, there are two swing blocks 6 and spring damping gears 5 between the first lead frame 2 located on the inner side and the spring 4 below it, and the two swing blocks 6 are distributed side by side and spaced apart along the direction parallel to the axis of the axle box 1 (due to It is overlapped in the figure, so only one of them can be seen); the swing block 6 is located between the spring damping gear 5 and the first guide frame 2, and is supported inside the first guide frame 2. The upper end of each swing block 6 is connected to the The first guide frame 2 is matched in a rotatable manner, the lower end of each swing block 6 is matched with the spring damping gear 5 in a rotatable manner, and the swing block 6 is arranged obliquely and has an included angle with the vertical direction. , its lower end is biased towards the axle box 1; the spring damping gear 5 is provided with a first friction surface 5-1 on the side corresponding to the axle box 1, and is pressed against the axle box 1 through the first friction surface 5-1 The second friction surface 1-2 on the side, the first friction surface 5-1 and the second friction surface 1-2 form a friction pair that can move relatively.

The damping principle is to use the included angle between the two swing blocks 6 and the vertical direction to decompose the vertical support force from the spring 4 to generate a horizontal force, so that the spring damping gear 5 generates a rightward force, so that the spring dampens the force. The right end of the vibration gear 5 faces the vertical surface of the left side of the axle box 1 to generate positive pressure, and the right side generates a horizontal support reaction force. When the axle box 1 has a vertical relative displacement relative to the spring damping gear 5, it can The friction force is generated in the direction, and then the damping effect is generated under the action of the friction force to realize the vibration reduction function.

Please refer to FIGS. 4 to 7. FIG. 4 is a side view of the pedestal shown in FIG. 3; FIG. 5 is a left side view of FIG. 4; FIG. 6 is a top view of FIG. 4; Schematic diagram of the structure viewed from the bottom after inversion.

As shown in the figure, the first lead frame 2 is in the shape of a cover with an opening downward, its top surface is flat, and is provided with a rectangular weight-reducing hole, which is welded with the lower cover plate of the side beam of the frame 7 to form an integral structure. The inner top of the frame 2 is provided with two concave arc surfaces 2-1 that are inclined to the left side, and a spring support portion 2-4 that protrudes downward is arranged in the middle position, and the lowest end of the spring support portion 2-4 is arranged. In the shape of a round table, the inner table plane of the round table is matched with the upper plane of the following inner spring 4-2 (there is a certain distance when the car is empty, and it is contacted when the vehicle is heavy). The flange of the round table is used to fix the inner spring 4-2, two The concave arc surface 2-1 is symmetrically located on both sides of the spring support part 2-4, a cavity for the swinging 6 pieces to swing is formed between the spring support part 2-4 and the inner wall of the guide frame 2, and the cavity is downward for open space.

The first guide frame 2 is provided with a side wall portion 2-2 extending downward on the side adjacent to the axle box 1, and the side wall portion 2-2 is provided with a frame opening 2-3 for the spring damping gear 5 to pass transversely, Sufficient clearance is left between the frame opening 2 - 3 and the spring damping gear 5 to prevent the spring damping gear 5 from interfering with the first lead frame 2 when the spring damping gear 5 moves up and down relative to the first lead frame 2 .

Please refer to FIGS. 8 and 9 . FIG. 8 is a schematic structural diagram of the swing block shown in FIG. 3 ; FIG. 9 is a left side view of the swing block shown in FIG. 8 .

As shown in the figure, the two swinging blocks 6 have the same shape and size, and are arranged in the cavities on both sides of the first guide frame 2. Each swinging block 6 has a certain length and thickness, and its lateral projection is The two ends are large and the middle is thin in the shape of a dumbbell. The swing block 6 is under pressure between the first guide frame 2 and the spring damping gear 5, and different inclination angles can be set according to needs.

The two ends of the swing block 6 are respectively provided with cylindrical surfaces 6-1 for support, which correspond to the inner top of the first guide frame 2 and the concave arc surface at the top of the spring damping gear 5 respectively. The upper end of the swing block 6 passes through the cylindrical surface 6 -1 is matched with the concave circular arc surface 2-1 of the first lead frame 2, and the lower end of the swing block 6 is matched with the concave circular arc surface 5-2 of the spring damping gear 5 through the cylindrical surface 6-1 to form Cylindrical surface mating structure.

The installed swing block 6 is located inside the first lead frame 2 and supported between the spring damping gear 5 and the first lead frame 2. The swing block 6 has a simple structure, is connected without welding, has high reliability, and is easy to manufacture. it is good.

Of course, the oscillating block 6 can also be in the shape of equal width with the size of the two ends consistent with the size of the middle in the lateral projection.

Please refer to FIGS. 10 to 13. FIG. 10 is an isometric view of the spring damper shown in FIG. 3; FIG. 11 is a side view of the spring damper shown in FIG. 10; FIG. 12 is a top view of FIG. 11; It is the left side view of Figure 11.

As shown in the figure, the spring 4 includes an outer spring 4-1 and an inner spring 4-2 of unequal heights. The main body of the spring damping gear 5 is in the shape of a disc, and the middle part is provided with a hole 5-3 that penetrates up and down. The concave arc surfaces 5-2 are symmetrically distributed on both sides of the hole 5-3, and the spring support portion 2-4 of the first lead frame 2 extends through the hole 5-3 into the inner spring 4-2, It is in direct contact with the upper plane of the inner spring 4-2 to provide spring positioning, and the annular lower plane of the spring damping gear 5 is the spring supporting surface, which is placed on the upper plane of the outer spring 4-1.

When the vehicle is empty, there is a certain distance between the inner spring 4-2 and the downwardly extending spring support 2-4 in the middle of the first lead frame 2; when the vehicle is heavy, after the outer spring 4-1 is compressed, the top surface of the inner spring 4-2 Only contact with the spring support part 2-4 of the first pedestal frame 2, the compressive force of the inner spring 4-2 is transmitted to the first pedestal frame, and then to the frame 7, that is, the inner spring 4-2 does not participate in vibration reduction, It only plays the role of bearing, and the inner spring 4-2 does not participate in the damping function when the heavy vehicle is heavy, which can avoid excessive damping when the heavy vehicle is heavy.

When the vehicle is empty, the lower plane of the second lead frame 3 is in contact with the outer spring 4-1 of the spring 4, and the spring force of the outer spring 4-1 is transmitted to the second lead frame 3 and then to the frame 7; when the vehicle is heavy, the The lower plane of the second lead frame 3 is in contact with the top surfaces of the outer spring 4-1 and the inner spring 4-2 at the same time, transferring the spring force of the outer spring 4-1 and the inner spring 4-2 to the second lead frame 3, and then Passed to framework 7.

The top of the spring damper 5 has a first top surface 5-4 and a second top surface 5-5, the second top surface 5-5 is higher than the first top surface 5-4 and the second top surface 5-5 is adjacent On one side of the first friction surface 5-1, there is a transition slope 5-6 between the first top surface 5-4 and the second top surface 5-5, and the concave arc surface 5-2 of the spring damping gear 5 is located on the side of the first friction surface 5-1. On the transition slope 5-6, this can better generate the horizontal component force to the right.

The right side of the spring damping gear 5 is provided with a side-standing friction plate 5-7. The friction plate 5-7 and the main body can have an integrated structure or a split assembly structure. The vertical surface of the friction plate 5-7 is provided with a concave structure. Groove 5-8, a wear plate 8 is embedded in the groove 5-8, the vertical surface of the wear plate 8 forms the first friction surface 5-1, and the vertical surface of the left side of the axle box 1 forms the second friction surface 1- 2. The first friction surface 5-1 is pressed against the second friction surface 1-2, and can move relatively along the vertical direction.

When the friction surface of the spring damping gear 5 and the axle box 1, and the mating surfaces of the swing block 6, the spring damping gear 5 and the first guide frame 2 are worn out, the inclination angle of the swing block 6 becomes larger, which can improve the vibration damping performance. And the longitudinal positioning rigidity is enhanced.

Of course, the vertical surface of the friction plate 5-7 can also directly form the first friction surface 5-1, and then press and fit with the second friction surface 1-2 on the side of the axle box 1, and can move relatively in the vertical direction. .

Please refer to FIGS. 14 and 15 , FIG. 14 is a schematic structural diagram of the axle box shown in FIG. 3 ; FIG. 15 is a top view of the axle box shown in FIG. 14 .

As shown in the figure, the inside of the axle box 1 can be arranged in an arc shape to directly cooperate with the bearing, or it can be arranged in a structure that cooperates with the bearing saddle 9, and a rubber pad 10 can also be arranged between the axle box 1 and the bearing saddle 9. The round tables on both sides of the box 1 are the inner and outer spring placement surfaces, and the vertical surfaces on both sides are the mating surfaces of the wear plate 8 installed with the spring damping gear 5 .

The above embodiments are only preferred solutions of the present invention, and are not specifically limited thereto. On this basis, targeted adjustments can be made according to actual needs, thereby obtaining different embodiments. E.g:

As shown in Figures 16 and 17, in the second embodiment, the swing blocks 6 and the spring damping gears 5 are symmetrically arranged on both sides of the left end wheelset.

As shown in FIG. 18 , in the third embodiment, the bogie is provided with a swing block 6 and a spring damping gear 5 on the outer side of the left end wheelset.

As shown in FIG. 19 , in the fourth embodiment, the bogie is provided with a swing block 6 and a spring damping gear 5 on the inner side of the right wheelset, and a bearing saddle 9 is provided in the axle box 1 .

As shown in FIG. 20 , in the fifth embodiment, the bogie is provided with a swing block 6 and a spring damping gear 5 on the outside of the left end wheelset, and a bearing saddle 9 is provided in the axle box 1 .

As shown in FIG. 21 , in the sixth embodiment, the bogie is provided with a swing block 6 and a spring damping gear 5 on the outside of the left end wheelset, and a bearing saddle 9 and a rubber pad 10 are provided in the axle box 1 .

As shown in FIG. 22 , in the seventh embodiment, the bogie is provided with a swing block 6 and a spring damping gear 5 on the inner side of the right wheelset, and a bearing saddle 9 and a rubber pad 10 are provided in the axle box 1 .

That is to say, in different embodiments, the bearing saddle 9 may be provided in the axle box 1, and the bearing saddle 9 and the rubber pad 10 may also be arranged in the axle box 1 to meet different performance requirements.

As shown in FIGS. 23 and 24 , in other embodiments, both ends of the swing block 6 are provided with pin holes 6 - 2 , the upper end of which is connected to the first lead frame 2 through a pin, and the lower end of which is connected to the first guide frame 2 through a pin. The connection of the spring damping gear 5 can also realize the functions of swinging and transmitting pressure, and on the basis of the pin connection, the cylindrical surface matching structure in the above embodiment can be used at the same time, for example, the upper end can be connected by a pin, the lower end The cylindrical surface matching structure is adopted, or the upper end adopts the cylindrical surface matching structure, and the lower end adopts the pin shaft connection, and the latter adopts the cylindrical surface matching structure and the pin shaft connection at the upper end and the lower end.

Since there are many possible implementations, examples are omitted here.

The axle box suspension device provided by the present invention converts the vertical force of the spring 4 into a horizontal component force and acts on the spring damping gear 5 through the inclination angle of the two swing blocks 6, and acts on the axle box 1 through the spring damping gear 5. side to generate positive pressure on both sides of axle box 1. Since the axle box 1 is installed on the wheelset bearing and is an unsprung part, the spring damping gear 5, the two swing blocks 6, the first pedestal 2, the second pedestal 3 and the frame 7 are all sprung parts. When vertical vibration occurs during operation, the axle box 1 produces a vertical displacement relative to the spring-loaded parts such as the spring damping gear 5, and friction resistance is generated under the action of the horizontal component forces on both sides of the axle box 1, resulting in a damping effect, and the vibration reduction function is realized. Effectively improve vehicle dynamic performance, realize technology upgrade, ensure continuous and stable vehicle dynamic performance, high safety and reliability, and vehicle performance will not decline due to wear and tear, with better longitudinal positioning function.

In addition to the above axle box suspension device, the present invention also provides a bogie, which is mainly composed of a frame 7, a suspension device 11, a wheel set 12 and a side bearing 13, etc. It can be a single-axle bogie, a two-axle bogie, or A three-axle bogie, a four-axle bogie or a five-axle bogie with multiple axles, among which at least one suspension device 11 is the axle box suspension device described above, and the first pedestal 2 and The top surface of the second lead frame 3 and the lower cover plate of the side beam of the frame 7 are welded to form an integral structure.

If it is a two-axle or multi-axle bogie, it is more preferable that the wheelsets at the left and right ends are provided with the above-mentioned axle box suspension device, and the swing block and the spring damping gear of the axle box suspension device are located at The inside or outside of the wheelset at the left and right ends.

Of course, the above-mentioned axle box suspension device can also be arranged at other positions of the bogie. Taking the wheelset at the end of the three-axle bogie as an example, it can be arranged at the wheelset at both ends of the bogie, or at the wheelset at the two ends of the bogie. At the end wheelset and the middle wheelset.

Since the structure of the bogie has already been described in the process of describing the axle box suspension device, the description will not be repeated here.

In addition to the above-mentioned axle box suspension device and bogie, the present invention also provides a railway freight car, including a bogie, a power system and a car box arranged on the bogie, wherein the bogie is equipped with the above-described equipment provided with the present invention. Provide the bogie of the axle box suspension device. For the rest of the structure of the railway freight car, please refer to the prior art, which will not be repeated here.

The axlebox suspension device, the bogie and the railway freight car provided by the present invention have been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

An axle box suspension device, comprising an axle box (1), a guide frame and a spring (4), the guide frame is located on both sides of the axle box (1), and the axle box (1) is provided with a spring bearing portion (1). -1), the spring (4) is located between the lead frame and the spring bearing part (1-1), characterized in that at least one of the lead frame and the spring (4) is provided with two A swinging block (6) and a spring damping gear (5); the two swinging blocks (6) are distributed side by side at intervals along the direction parallel to the axis of the axle box (1), and the upper end of each swinging block (6) The guide frame is rotatably matched with the lower end of each swing block (6) and the spring damping gear (5) is rotatably matched, and the swing block (6) is inclined It is arranged at an angle with the vertical direction, and its lower end is inclined to the axle box (1); the side surface of the spring damping gear (5) is provided with a first friction corresponding to the axle box (1). The first friction surface (5-1) is pressed against the second friction surface (1-2) on the side of the axle box (1), the first friction surface (5-1) A friction pair capable of relative movement is formed with the second friction surface (1-2).
The axle box suspension device according to claim 1, characterized in that the two ends of the swing block (6) are respectively provided with cylindrical surfaces (6-1) for supporting, the inner top of the guide frame and the spring The top of the vibration damping gear (5) is respectively provided with two concave arc surfaces (5-2). The corresponding concave arc surfaces (5-2) are rotated and matched, and the lower ends of the swing blocks (6) are connected to the corresponding ones on the spring damping gear (5) through the cylindrical surface (6-1). The concave arc surface (5-2) rotates and fits;

And/or, both ends of each of the swing blocks (6) are provided with pin shaft holes (6-2), the upper end of which is rotatably connected to the guide frame through a pin shaft, and the lower end of which is connected to the spring through a pin shaft to reduce vibration gear (5) is connected in rotation.
The axle box suspension device according to claim 2, characterized in that, the spring damping gear (5) is provided with a friction plate (5-7) standing on the side, and the vertical friction plate (5-7) is provided with a friction plate (5-7). The first friction surface (5-1) forms the first friction surface (5-1), the vertical surface of the side surface of the axle box (1) forms the second friction surface (1-2), and the first friction surface (5-1) Can move relative to the second friction surface (1-2) in the vertical direction; or,

The spring damping gear (5) is provided with a friction plate (5-7) standing on the side, and the vertical surface of the friction plate (5-7) is provided with a groove (5-8), and the groove ( 5-8) A wear plate (8) is installed inside, the vertical surface of the wear plate (8) forms the first friction surface (5-1), and the vertical surface of the side surface of the axle box (1) The second friction surface (1-2) is formed, and the first friction surface (5-1) and the second friction surface (1-2) can move relatively along the vertical direction.
The axle box suspension device according to claim 2, wherein the spring (4) comprises an outer spring (4-1) and an inner spring (4-2), and the main body of the spring damping gear (5) Part of the hole (5-3) is provided in the middle part, the two concave arc surfaces (5-2) are symmetrically distributed on both sides of the hole (5-3), and the spring The bottom of the damping gear (5) is located on the upper plane of the outer spring (4-1).
The axle box suspension device according to claim 4, characterized in that, the main body of the spring damping gear (5) is in the shape of a disc, and the top thereof has a first top surface (5-4) and a second top surface (5-5), the second top surface (5-5) is higher than the first top surface (5-4) and the second top surface (5-5) is located adjacent to the first friction surface On one side of (5-1), a transition slope (5-6) is formed between the first top surface (5-4) and the second top surface (5-5), and the spring damping gear (5) The two concave arc surfaces (5-2) are located on the transition slope (5-6).
The axle box suspension device according to claim 4, characterized in that the pedestal provided with the swing block (6) and the spring damping gear (5) is in the shape of a cover with an opening downward, and its interior is in the middle position A downwardly protruding spring support portion (2-4) is provided, and the spring support portion (2-4) passes through the hole (5-3) of the spring damping gear (5) and is supported in the inner Springs (4-2).
The axle box suspension device according to claim 6, characterized in that, the two concave arc surfaces (2-1) on the inner top of the pedestal frame are symmetrically located on the two sides of the spring support portion (2-4). On the side, a cavity for the swinging block (6) to swing is formed between the spring support part (2-4) and the inner wall of the guide frame.
The axle box suspension device according to claim 6, wherein the guide frame is provided with a downwardly extending side wall portion (2-2) on a side adjacent to the axle box (1), and the side wall portion (2-2) extends downward. The wall portion (2-2) is provided with a frame opening (2-3) for the spring damping gear (5) to pass laterally, and the spring vibration damping gear (5) is connected to the frame opening (2-3) There are gaps in between.
The axle box suspension device according to claim 2, wherein the lateral projection of the swing block (6) is a dumbbell shape with two ends larger than the middle size or an equal-width shape with the same size as the middle size.
The axle box suspension device according to any one of claims 1 to 8, characterized in that, only one pedestal frame and its spring (4) in the pedestal frame are provided with two of the swing blocks (6) and Spring damper (5).
A bogie, comprising a frame (7), a suspension device (11), a wheelset (12) and a side bearing (13), characterized in that the suspension device (11) includes any of the above claims 1 to 10. In the axle box suspension device, the top surface of the pedestal frame of the axle box suspension device and the lower cover plate of the side beam of the frame (7) are welded into an integral structure.
The bogie according to claim 11, characterized in that it is a two-axle or multi-axle bogie, and the wheel (12) pair at the left and right ends are provided with the axle box suspension device, and the axle box is suspended The two swing blocks (6) and the spring damping gear (5) of the device are located on the inner side or outer side of the wheel pairs (12) at the left and right ends.
A railway freight car includes a bogie, a power system provided on the bogie, and a car box, wherein the bogie is the bogie according to claim 11 or 12.