CN112874566B

CN112874566B - Framework, bogie with framework and railway vehicle

Info

Publication number: CN112874566B
Application number: CN201911202348.8A
Authority: CN
Inventors: 杨怡; 谭志成; 柴盈盈
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2022-11-11
Anticipated expiration: 2039-11-29
Also published as: CN112874566A

Abstract

The invention provides a framework for a railway vehicle bogie, which comprises an air chamber, a gas tank and a gas tank, wherein the air chamber is a cavity structure in the framework; the air chamber is provided with an air inlet which is suitable for communicating the air chamber with an air suspension; the air chamber includes the air chamber bottom, the air chamber bottom is equipped with the outlet, be equipped with the drain valve on the outlet. The framework for the bogie of the railway vehicle is provided with the cavity serving as the additional air chamber for air suspension, so that the volume of the air suspension is greatly increased, and the effect of reducing the rigidity of the air suspension is relatively ideal.

Description

Framework, bogie with framework and railway vehicle

Technical Field

The invention belongs to the field of rail transit, and particularly relates to a framework, a bogie and a rail vehicle.

Background

The existing railway vehicle bogie adopting the air suspension generally reduces the rigidity of the air suspension by additionally arranging a separate additional air chamber to increase the volume. However, due to the limitation of the arrangement space, the additional air chamber of the air suspension is generally very narrow and cannot achieve the best effect of reducing the rigidity of the air suspension, and the air suspension and the additional air chamber have a relatively complex connecting structure, so that a certain air leakage risk exists.

Disclosure of Invention

In order to solve the technical problems, the invention provides the framework, the cavity is arranged in the framework to serve as the additional air chamber of the air suspension, so that the volume of the air suspension is greatly increased, and the framework has an ideal effect of reducing the rigidity of the air suspension.

The specific technical scheme of the invention is as follows:

a frame for a railway vehicle bogie comprising a plenum, the plenum being a hollow structure within the frame; the air chamber is provided with an air inlet which is suitable for communicating the air chamber with an air suspension; the air chamber includes the air chamber bottom, the air chamber bottom is equipped with the outlet, be equipped with the drain valve on the outlet.

Through be in set up cavity structure formation air chamber in the framework to with the air suspension intercommunication back, but greatly increased air suspension's volume for air suspension has the effect of more ideal reduction air suspension rigidity, can improve air suspension's support and shock-absorbing capacity, thereby improves passenger's riding comfort. Meanwhile, the water outlet and the water discharge valve are arranged at the bottom of the air chamber and used for discharging accumulated water generated due to insufficient drying of air, and the service life of the framework is prevented from being influenced due to rusting.

In addition, the framework according to the invention can also have the following additional technical features.

In some examples of the invention, the drain opening extends through a side panel of the plenum from the plenum bottom; the upper surface of air chamber bottom is the air chamber bottom surface in, the bottom surface is equipped with sunken water drainage tank in the air chamber, water drainage tank with the outlet intercommunication. Through set up with the outlet intercommunication water drainage tank is convenient for with ponding in the air chamber to the outlet is discharged.

In some examples of the present invention, the recess depth of the drain groove gradually increases in a direction extending from the inside of the air chamber toward the drain opening. The drainage groove forms an inclined plane through the gradually changing sunken depth, and is further favorable for guiding accumulated water to the drainage outlet.

In some examples of the present invention, the inner bottom surface of the air cell is inclined, and a height of the inner bottom surface of the air cell adjacent to the drain groove portion is smaller than a height of the remaining portion of the inner bottom surface of the air cell. The bottom surface in the air chamber inclines and faces the water drainage groove, and therefore the water is further guided to the water drainage port.

In some examples of the invention, the drain valve is provided with an internal valve port, the internal valve port is communicated with the drain tank, and the bottom height of the internal valve port is smaller than or equal to the bottom height of the drain tank. Through setting up the bottom height that interior valve port is less than or equal to the bottom height of water drainage tank, avoided appearing ponding between drain valve and the water drainage tank and remain.

In some examples of the invention, the frame further comprises a suspension mount adapted to mount an air suspension; the air inlet extends from the air chamber to the suspension mounting seat and penetrates through the suspension mounting seat. The air suspension is installed on the suspension mounting seat, and is directly through running through the air inlet of the suspension mounting seat and the air chamber communication, so that the air suspension and the connecting structure between the air chambers are more simplified, and the risk of air leakage is reduced.

In some examples of the invention, the plenum further comprises an upper ceiling, an outer panel, a lower panel, an inner panel, an adjustment panel, a front panel, and a rear panel; the upper top plate, the outer side plate, the lower side plate, the bottom of the air chamber, the inner side plate and the adjusting plate are sequentially connected to form a closed loop structure, and the front side plate and the rear side plate are respectively connected with the upper top plate, the outer side plate, the lower side plate, the bottom of the air chamber, the inner side plate and the adjusting plate; the upper top plate and the lower side plate are arranged oppositely in the vertical direction, the inner side plate and the outer side plate and the lower side plate are arranged oppositely in the left-right direction, and the front side plate and the rear side plate are arranged oppositely in the front-back direction. The air chamber is limited by a plurality of plate-shaped structures, so that the frame is low in manufacturing cost and light in weight, and the strength of the frame is guaranteed by the connection mode of the plate-shaped structures.

In some examples of the invention, the upper top plate is provided with a suspension mounting seat, and a stabilizing wheel mounting seat is arranged below the bottom of the air chamber. The suspension mounting seat is arranged above the air chamber, and the stabilizing wheel mounting seat is arranged below the air chamber, so that the structural compactness of the framework is improved.

The invention also provides a bogie which comprises the air suspension and the framework provided by the invention; the air suspension is in communication with the air chamber through the air inlet. The air chamber is formed by arranging the cavity structure in the framework, and the volume of the air suspension is greatly increased after the air chamber is communicated with the air suspension, so that the air suspension has a more ideal effect of reducing the rigidity of the air suspension, namely, the supporting and buffering performance of the air suspension is improved, and the riding comfort of passengers is improved. Meanwhile, the water outlet and the water discharge valve are arranged at the bottom of the air chamber and used for discharging accumulated water generated due to insufficient drying of air, and the service life of the framework is prevented from being influenced due to rusting.

The invention further provides a railway vehicle comprising the bogie provided by the invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of a bogie provided by an embodiment of the present invention.

FIG. 2 is a front view and a partial sectional view of a frame provided by an embodiment of the present invention.

Fig. 3 is a partially enlarged view of the area a in fig. 2.

Fig. 4 is a partially enlarged view of the area B in fig. 2.

FIG. 5 is a schematic view of the bottom of the plenum and stabilizer wheel mounts of the frame provided by an embodiment of the invention.

Fig. 6 is a schematic diagram of a framework provided by an embodiment of the invention.

Reference numerals:

1000. a bogie;

100. a frame;

110. a gas chamber; 111. an air inlet; 110a, the bottom of the air chamber; 110aa, the inner bottom surface of the air chamber; 110b, an upper top plate; 110c, outer panels; 110d, lower side plate; 110e, inner side plates; 110f, an adjusting plate; 110g, a front side plate; 110h, a rear side plate; 112. a water outlet; 113. a drain valve; 113a, inner valve port; 114. a water discharge tank;

120. a suspension mounting seat; 130. a stabilizer wheel mounting seat; 141. a first longitudinal beam; 142. a second stringer; 143. a first cross member; 144. a second cross member; 150. an electric assembly mounting frame; 160. a first stopper mounting bracket; 170. a second stop mounting bracket; 181. a first stopper; 182. a second stop; 183. a third stop;

200. air suspension; 300. a running wheel; 400. an electric assembly; 500. a guide wheel; 600. and (4) stabilizing the wheels.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "vertical," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the indicated orientations and positional relationships, based on the orientation or positional relationship illustrated in the drawings, for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention. Wherein the content of the first and second substances, xthe axial direction is the longitudinal direction,xthe positive direction of the axis is the front direction,xthe negative axis direction is rear;ythe axial direction is a transverse direction,ythe positive direction of the axis is the right direction,ythe axial negative direction is left;zthe axial direction is vertical or vertical,zthe positive direction of the axis is upward,zthe axial negative direction is lower;xOythe plane is the horizontal plane, and the horizontal plane,xOzthe plane is the vertical plane in the longitudinal direction,yOzi.e. the transverse vertical plane. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

The frame 100, the bogie 1000 and the rail vehicle according to the embodiment of the present invention are described in detail below with reference to fig. 1 to 6.

The railway vehicle includes a vehicle body (not shown) and a bogie 1000, and the bogie 1000 is used for supporting the vehicle body and driving the railway vehicle. As shown in fig. 1, the bogie 1000 comprises a frame 100, an air suspension 200, road wheels 300 and an electric motor assembly 400, wherein the air suspension 200 is mounted on the frame 100 and is adapted to be connected with and support and cushion the vehicle body; the running wheels 300 are mounted on the frame 100 and are adapted to cooperate with the rails to support and run the entire rail vehicle; the electric assembly 400 is mounted on the frame 100 and is in transmission connection with the running wheels 300 for driving the running wheels 300 to rotate.

In some embodiments, the railway vehicle is a straddle-type monorail vehicle, and is adapted to run on a railway beam, as shown in fig. 1, the bogie 1000 further comprises guide wheels 500 and stabilizing wheels 600, the guide wheels 500 are adapted to cooperate with the outside of the railway beam to guide the railway vehicle, and the stabilizing wheels 600 are adapted to cooperate with the outside of the railway beam and are located below the guide wheels 500, so that the clamping moment of the bogie 1000 on the railway beam is increased, and the transverse stability of the railway vehicle is ensured.

As shown in fig. 2 to 4, the frame 100 includes an air chamber 110, and the air chamber 110 is a cavity structure in the frame 100. The air cell 110 is provided with an air inlet 111, the air inlet 111 being adapted to communicate the air cell 110 with the air suspension 200. The air chamber 110 includes a chamber bottom 110a, the chamber bottom 110a is provided with a drain port 112, and the drain port 112 is provided with a drain valve 113.

The air chamber 110 is formed by the cavity structure arranged in the framework 100 by utilizing the volume of the framework 100, and is communicated with the air suspension 200 as an additional air chamber, so that the volume of the air suspension 200 is greatly increased while the independent and narrow additional air chamber is omitted, the air suspension 200 has an ideal effect of reducing the rigidity of the air suspension, the supporting and buffering performances of the air suspension 200 can be improved, and the riding comfort of passengers is improved.

Meanwhile, because the air supply system can not dry the air by one hundred percent, condensed water can be separated out after the air supply system operates for a period of time, namely, accumulated water can be generated in the air chamber 110, the water outlet 112 and the water discharge valve 113 are arranged, the water discharge valve 113 is opened through manpower or a control device after the air supply system operates for a period of time, the accumulated water is discharged through the water outlet 112 and the water discharge valve 113 under the action of high-pressure air in the air chamber 110, and the phenomenon that the accumulated water is rusted in the air chamber 110 to influence the service life of the framework 100 is avoided. In addition, in the process of processing the frame 100, processing residues may be present inside the frame 100, and the drain port 112 may be used as a discharge port for the processing residues.

As shown in fig. 2 to 4, in some embodiments, the drain port 112 penetrates a side plate (e.g., a lower side plate 110d, an inner side plate 110e, a front side plate 110g, or a rear side plate 110 h) of the air chamber 110 from the air chamber bottom 110 a. The upper surface of the air chamber bottom 110a is an air chamber inner bottom surface 110aa, the air chamber inner bottom surface 110aa is provided with a concave drain groove 114, and the drain groove 114 is communicated with the drain port 112. By providing the drain groove 114 communicating with the drain port 112, it is facilitated to guide the accumulated water in the air chamber 110 to the drain port 112 and drain it. The drain port 112 extends through a side plate of the air chamber 110 so that the lower side of the air chamber 110 can be used to dispose other components such as a stabilizer wheel mount 130. The present invention is not limited to this, and the drain port 112 may be formed to penetrate downward from the air chamber bottom 110 a.

As shown in fig. 4 to 5, in some embodiments, the depth of the drain groove 114 gradually increases in a direction extending from the inside of the air chamber 110 to the drain opening 112. The drainage channel 114 is beveled by a gradually changing depression depth to further facilitate the direction of accumulated water to the drain opening 112.

As shown in FIG. 4, in some embodiments, the inner bottom surface 110aa of the air chamber is inclined, and the portion of the inner bottom surface 110aa of the air chamber adjacent to the drain groove 114 has a height smaller than that of the remaining portion of the inner bottom surface 110aa of the air chamber. The chamber inner bottom surface 110aa is sloped and is sloped toward the drain channel 114 to further facilitate the direction of accumulated water toward the drain opening 112.

As shown in fig. 4, in some embodiments, the drain valve 113 is provided with an inner valve port 113a, the inner valve port 113a communicates with the drain tank 114, and the bottom height of the inner valve port 113a is less than or equal to the bottom height of the drain tank 114. When accumulated water needs to be drained, the drainage valve 113 is opened, the accumulated water flows towards the inner valve port 113a along the drainage groove 114, and the accumulated water flows out smoothly at the joint of the drainage groove 114 and the inner valve port 113a without obstruction because the bottom height of the inner valve port 113a is less than or equal to that of the drainage groove 114, so that accumulated water residue between the drainage valve 113 and the drainage groove 114 is avoided.

In some embodiments, the drain valve 113 is threaded with the drain port 112, and a seal (not shown) is disposed between the drain valve 113 and the drain port 112. By providing the sealing member, the sealing property between the drain valve 113 and the drain port 112 is improved.

In some embodiments, the inner surface of the plenum 110 is provided with a corrosion resistant coating (not shown). Further avoiding the life of the frame 100 from being affected by rust is provided by the anti-corrosive coating.

As shown in fig. 2 to 3, in some embodiments, the frame 100 further comprises a suspension mount 120, the suspension mount 120 being adapted to mount an air suspension 200. The air inlet 111 extends from the air chamber 110 to the suspension mount 120 and penetrates the suspension mount 120. The air suspension 200 is installed on the suspension mounting seat 120 and is directly communicated with the air chamber 110 through the air inlet 111 penetrating through the suspension mounting seat 120, so that the connecting structure between the air suspension 200 and the air chamber 110 is more simplified, and the risk of air leakage is reduced.

As shown in fig. 2 to 3, in some embodiments, the air chamber 110 further includes an upper top plate 110b, an outer side plate 110c, a lower side plate 110d, an inner side plate 110e, an adjusting plate 110f, a front side plate 110g, and a rear side plate 110h. The upper top plate 110b, the outer side plate 110c, the lower side plate 110d, the air chamber bottom 110a, the inner side plate 110e and the regulating plate 110f are sequentially connected to form a closed loop structure, and the front side plate 110g and the rear side plate 110h are respectively connected with the upper top plate 110b, the outer side plate 110c, the lower side plate 110d, the air chamber bottom 110a, the inner side plate 110e and the regulating plate 110 f. The upper top plate 110b and the lower side plate 110d are disposed to face each other in the vertical direction, the inner side plate 110e is disposed to face the outer side plate 110c and the lower side plate 110d in the horizontal direction, and the front side plate 110g and the rear side plate 110h are disposed to face each other in the front-rear direction. By adjusting the position of the adjustment plate 110f, the volume of the air chamber 110 can be adjusted, thereby adjusting the stiffness of the air suspension 200. The air cells 110 are defined by a plurality of plate-shaped structures, so that the frame 100 is manufactured at a low cost and the frame 100 is advantageously lightweight, and the strength of the frame 100 is ensured by the connection between the plate-shaped structures. In some embodiments, the plenum bottom 110a, the upper top plate 110b, the outer side plate 110c, the lower side plate 110d, the inner side plate 110e, the adjustment plate 110f, the front side plate 110g, and the rear side plate 110h are integrally formed or welded therebetween.

As shown in FIG. 3, in some embodiments, the upper top plate 110b is provided with a suspension mounting base 120, and the stabilizing wheel mounting base 130 is provided below the air chamber bottom 110a, i.e. adapted to provide the air suspension 200 above the air chamber 110, and adapted to provide the stabilizing wheel 600 below the air chamber 110, which improves the compactness of the frame 100.

As shown in fig. 6, in some embodiments, the frame 100 further comprises a running wheel mount comprising a first longitudinal beam 141, a second longitudinal beam 142, a first transverse beam 143, a second transverse beam 144, the first longitudinal beam 141, the first transverse beam 143, the second longitudinal beam 142 and the second transverse beam 144 being connected in series in a frame-shaped structure adapted to receive a running wheel 300. Two air cells 110 are provided, one air cell 110 being connected to the first longitudinal beam 141, and the other air cell 110 being connected to the second longitudinal beam 142.

As shown in FIGS. 1 and 6, in some embodiments, the frame 100 further includes a motorized assembly mount 150 and a first stop mount 160. The electro-motive assembly mounting bracket 150 is disposed on the first longitudinal beam 141. The first stopping mounting frame 160 is connected to the first longitudinal beam 141 or the electric assembly mounting frame 150, and in the left-right direction, the first stopping mounting frame 160 is located between the air chamber 110 and the electric assembly mounting frame 150, and at least a partial overlap exists between a projection of the first stopping mounting frame 160 in the left-right direction and a projection of the electric assembly mounting frame 150 in the left-right direction. That is to say, in the left-right direction, the first stopper mount 160 is located between the air suspension 200 and the electric assembly 400, and at least a part of the projection of the electric assembly 400 in the left-right direction, the projection of the first stopper mount 160 in the left-right direction, and the projection of the air suspension 200 in the left-right direction overlap, that is, the first stopper mount 160 separates the air suspension 200 from the electric assembly 400, so as to avoid collision between the air suspension 200 and the electric assembly 400, and the first stopper 181 is disposed outside the first stopper mount 160 for buffering the collision between the air suspension 200 and the first stopper mount 160. Note that the outer side of the first stopper mount 160 refers to a side away from the center of the frame 100. In some embodiments, the first stopper 181 is a rubber.

As shown in fig. 6, in some embodiments, the projection of the first stopper mount 160 in the up-down direction is substantially C-shaped, a circular space is provided between the electromotive assembly mount 150 and the first longitudinal beam 141, and the first stopper mount 160, the electromotive assembly mount 150, and the first longitudinal beam 141 together define a space suitable for mounting the electromotive assembly 400.

As shown in fig. 1 and 6, in some embodiments, the frame 100 further includes a second stopper mount 170, the second stopper mount 170 is disposed on the second longitudinal beam 142 to separate the second longitudinal beam 142 from the air suspension 200 to prevent collision between the second longitudinal beam 142 and the air suspension 200, and a second stopper 182 is disposed at an outer side of the second stopper mount 170 to buffer collision between the air suspension 200 and the second stopper mount 170. Note that the outer side of the second stopper mounting bracket 170 refers to a side away from the center of the frame 100. In some embodiments, the second stop 182 is a rubber.

As shown in fig. 2 and 6, in some embodiments, the bottom of the first stop mount 160 or the second stop mount 170 is provided with a third stop 183. The third stopper 183 serves to cushion a portion of the structure of the air suspension 200 located below the first stopper mount 160 or the second stopper mount 170 from colliding with the first stopper mount 160 or the second stopper mount 170. In some embodiments, the third stop 183 is a rubber.

Other constructions and operations of the frame 100, the bogie 1000 and the rail vehicle according to embodiments of the invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A frame for a railway vehicle bogie comprising:

the air chamber is a cavity structure in the framework; the air chamber is provided with an air inlet which is suitable for communicating the air chamber with an air suspension; the air chamber comprises an air chamber bottom, a water outlet is formed in the air chamber bottom, and a drain valve is arranged on the water outlet;

the walking wheel mounting frame is suitable for mounting walking wheels and comprises a first longitudinal beam, a second longitudinal beam, a first cross beam and a second cross beam, wherein the first longitudinal beam, the first cross beam, the second longitudinal beam and the second cross beam are sequentially connected into a frame-shaped structure and are suitable for accommodating the walking wheels;

a power assembly mounting bracket adapted to mount a power assembly, the power assembly mounting bracket disposed on the first stringer; and

the first backstop mounting bracket is suitable for installing a first backstop, the first backstop mounting bracket with first longeron or electric assembly mounting bracket connects, and on the left and right sides direction, the first backstop mounting bracket is located the air chamber with between the electric assembly mounting bracket, the projection of first backstop mounting bracket along left and right sides direction with there is partial coincidence at least in the projection of electric assembly mounting bracket along left and right sides direction.

2. The frame of claim 1, wherein the drain openings extend through the side panels of the plenum from the plenum bottom; the upper surface of air chamber bottom is the air chamber bottom surface in, the bottom surface is equipped with sunken water drainage tank in the air chamber, water drainage tank with the outlet intercommunication.

3. The framework of claim 2, wherein the drainage channel has a gradually increasing depth of concavity in a direction extending from the interior of the plenum to the drain opening.

4. A framework as defined in claim 2 or 3, wherein the air chamber inner bottom surface is inclined and the height of the air chamber inner bottom surface adjacent to the drain portion is smaller than the height of the remaining portion of the air chamber inner bottom surface.

5. The framework of claim 2, wherein the drain valve is provided with an internal valve port, the internal valve port is in communication with the drain channel, and a bottom height of the internal valve port is less than or equal to a bottom height of the drain channel.

6. The framework of claim 1, further comprising a suspension mount adapted to mount an air suspension; the air inlet extends from the air chamber to the suspension mounting seat and penetrates through the suspension mounting seat.

7. The frame of claim 1, wherein the plenum further comprises an upper top plate, an outer side plate, a lower side plate, an inner side plate, an adjustment plate, a front side plate, and a rear side plate;

the upper top plate, the outer side plate, the lower side plate, the bottom of the air chamber, the inner side plate and the adjusting plate are sequentially connected to form a closed loop structure, and the front side plate and the rear side plate are respectively connected with the upper top plate, the outer side plate, the lower side plate, the bottom of the air chamber, the inner side plate and the adjusting plate;

the upper top plate and the lower side plate are arranged oppositely in the vertical direction, the inner side plate is arranged oppositely to the outer side plate and the lower side plate in the left-right direction, and the front side plate and the rear side plate are arranged oppositely in the front-back direction.

8. A frame as claimed in claim 7, in which the upper roof is provided with suspension mounts and the lower part of the chamber bottom is provided with stabilising wheel mounts.

9. A bogie characterised by comprising an air suspension and a framework according to any one of claims 1 to 8; the air suspension is in communication with the air chamber through the air inlet.

10. A rail vehicle, characterized in that it comprises a bogie according to claim 9.