JP2000289611A - Trucks for railway vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bogie for a railway vehicle equipped with a bogie frame configured to suppress a torsional load generated on a side beam by mounting an air spring while suppressing a weight increase as much as possible. To do. SOLUTION: Side beams 2 arranged on the left and right, and two cross beams arranged front and rear to fix the left and right side beams 2 at positions not interfering with a center pin and a wheel connecting a bogie 11 and a vehicle body 12 1, a pair of connecting beams 13 for fixing the two cross beams 1 at positions not interfering with the center pin and the left and right side beams 2, and each of these connecting beams 13 and one side beam 2 respectively. One air spring receiving beam 21 is provided for each of the right and left, one end of which penetrates the side beam 2 and protrudes to the outside of the side beam 2, and the air spring 3 is supported by each of the air spring receiving beams 21. This is the configuration. [Effect] Even when the torsion load generated in the side beam is prevented by the attachment of the air spring, the weight increase of the bogie can be suppressed as much as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie for a railway vehicle which can be reduced in weight.

[0002]

2. Description of the Related Art In a railway vehicle, an air spring is mounted at a position as far as possible to the left and right ends of the bogie in order to reduce rolling generated between the vehicle body and the bogie. Therefore, a torsional load acts on the side beams arranged on the left and right sides, and a strength problem occurs at the joint between the side beams and the cross beams. In order to improve the reliability of the joint between the side beam and the cross beam due to the torsional load, as shown in FIG. 4, the front and rear sides of the side beam 2 are fixed at a position where they do not interfere with the center pin connecting the bogie and the vehicle body and the wheels. The arranged two cross beams 1 are made to penetrate from the side beams 2,
By attaching the air spring 3 to the penetrated cross beam 1, the air spring 3 is made independent of the side beam 2, and the joint between the side beam and the cross beam generated by the torsion load generated in the side beam 2 due to the air spring 3 is formed. Solve strength problems. However, in this method, the length of the cross beam 1 is increased by an amount protruding from the side beam 2, and the receiving member 4 of the air spring 3 also needs to have a length straddling between the cross beams 1, so that the weight increases. There was a disadvantage. In addition, 13 in FIG. 4 is a connecting beam which connects the horizontal beams 1 to each other.

Also, the bogie frame of a railway vehicle not only bears the vertical load for supporting the vehicle body, but also the torsional load at the entrance of the relaxation curve, the longitudinal load during braking and acceleration, and the left and right due to centrifugal force in the curved section. It also bears loads. Also,
The cross beam receives a reaction force of a driving device and a brake torque attached to the cross beam, and further, in the case of a bogie equipped with a motor, a torsional load is applied to the cross beam by vibration of the motor. In particular, with the speeding-up of railway vehicles, the load caused by vertical vibration of the motor during traveling has become a problem.

The high stress generated at the joint between the motor seat and the cross beam during traveling is a dynamic stress that vibrates in a vibration mode as shown in FIG. That is, when the motor 5a moves upward, the spring caps 6a and 7a and the motor 5b move downward, and the downward movement of the motor 5b causes the spring cap 6a to move.
b and 7b move upward, and the cross beam 2 is twisted. From this vibration mode shape, it can be seen that the natural frequency of this vibration mode can be increased by increasing the torsional rigidity of the cross beam, but increasing the torsional rigidity increases the weight of the cross beam and, consequently, the weight of the bogie. Cause.

Further, most of the bolsterless bogies for high-speed railway vehicles which are currently employed are equipped with a yaw damper on most of them in order to prevent the bogie from snaking. In addition, when installing an anti-rolling device to prevent rolling of the vehicle body, it is necessary to allow rigidity only for rolling while allowing the vehicle body to move up and down, front and back, left and right, so a yaw damper is Separately exists independently. As a method of attaching the yaw damper, for example, in Japanese Patent Application Laid-Open No. 61-241258, as shown in FIG. The torsion rod 8 provided in the sleeper direction and the yaw dampers 9 arranged at both ends thereof in the rail direction are connected via the link 10 so that the vibration of the bogie 11 can be controlled via the yaw damper 9. One that prevents transmission to the vehicle body 12 is disclosed.

However, Japanese Patent Application Laid-Open No. 61-241258 shows
However, although the vibration component transmitted through the yaw damper can be reduced, the number of components such as a torsion bar and a link mechanism is greatly increased, which causes an increase in the weight of the bogie.

[0007]

As described above,
In conventional trucks for railway vehicles, when the installation method of the air spring is changed to a configuration that can suppress the torsional load generated on the side beams, or when an anti-rolling device is installed in addition to the yaw damper, There was a problem that the weight increased.

The present invention has been made in view of the above-mentioned problems, and has a structure capable of suppressing a torsional load generated in a side beam by the attachment of an air spring while suppressing an increase in weight as much as possible. It is an object of the present invention to provide a railcar bogie equipped with a bogie frame or a railcar bogie capable of minimizing weight increase even when an anti-rolling device is provided in addition to a yaw damper. .

[0009]

In order to achieve the above-mentioned object, a first bogie for a railway vehicle according to the present invention comprises side beams arranged on the right and left, a center pin and wheels for connecting the bogie with the vehicle body. The two cross beams arranged in front and rear so as to fix the left and right side beams at a position where they do not interfere with each other, and a pair of connecting beams that fix the center pin and the left and right side beams at positions that do not interfere with each other, The air springs are fixed by one air spring receiving beam on each of the left and right ends protruding outside the side beams, and the air springs are supported by these air spring receiving beams. By doing so, the torsional load generated on the side beams due to the attachment of the air spring can be prevented, and the weight of the bogie can be suppressed. The air spring receiving beam can improve the rigidity in the vibration mode shown in FIG. 5, and is a member that is strong against a load due to the vibration of the motor.

Further, a second bogie for a railway vehicle according to the present invention comprises:
One end of each of the two yaw dampers horizontally arranged in the rail direction is placed at a position separated by a predetermined distance from the rotation center of the bogie,
The torsion rods arranged substantially parallel to the axle and rotatable with respect to the bogie are pivotally supported on both left and right ends, and the other ends of the yaw dampers are pivotally connected to damper receiving members suspended from the vehicle body. I did it. By doing so, even when an anti-rolling device is provided in addition to the yaw damper, an increase in weight can be suppressed as much as possible.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first bogie for a railway vehicle according to the present invention has side beams arranged on the left and right, and a center pin for connecting the bogie and the vehicle body and the left and right side beams fixed at positions not to interfere with the wheels. The two cross beams arranged in front and rear, the two cross beams that fix the two cross beams at positions that do not interfere with the center pin and the left and right side beams, and each of these cross beams An air spring receiving beam is provided for each of the left and right sides, which is fixed by one side beam and one end of which penetrates the side beam and protrudes to the outside of the side beam, so that each of the air spring receiving beams supports the air spring. It was made.

[0012] A truck for a second railway vehicle according to the present invention comprises:
One end of each of the two yaw dampers horizontally arranged in the rail direction is placed at a position separated by a predetermined distance from the rotation center of the bogie,
The torsion rod, which is arranged substantially parallel to the axle and rotatable with respect to the bogie, is pivotally supported at both left and right ends,
The other end of each of these yaw dampers is pivotally connected to a yaw damper receiving member suspended from the vehicle body, and restrains a cylinder and a piston constituting the yaw damper with one degree of freedom as necessary.

Since the bogie for a railway vehicle according to the present invention is configured as described above, the torsional load generated on the side beam due to the attachment of the air spring is prevented, and the bogie is provided with an anti-rolling device in addition to the yaw damper. In some cases,
An increase in the weight of the cart can be suppressed as much as possible.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bogie for a railway vehicle according to the present invention will now be described with reference to FIGS.
A description will be given based on the embodiment shown in FIG. FIG. 1 shows the first embodiment of the present invention.
FIG. 2A is a diagram showing a schematic configuration of a bogie frame constituting a bogie for a railway vehicle, FIG. 2A is a perspective view illustrating an overall schematic of a second bogie for a railway vehicle of the present invention, and FIG. (A) is a partial view, (c) is a diagram illustrating the state of the torsion bar and the yaw damper during vertical vibration, (d) is a diagram illustrating the state of the torsion bar and the yaw damper during rolling, and FIG. 3 is the present invention. It is a figure explaining the outline of an important section of other modes of the 2nd bogie for rail vehicles.

In FIG. 1, reference numeral 21 denotes, for example, a cylindrical air spring receiving beam which also serves as a receiving member of the air spring 3, and is a pair of two beams for fixing two cross beams 1 arranged in front and rear. The beam 13 is fixed by one side beam 2, and one end penetrates the side beam 2 and projects outside the side beam 2,
An air spring 3 is supported at one end of the protruding portion.

In the first railway vehicle bogie of the present invention, as described above, by providing the air spring receiving beam 21 penetrating the side beam 2, the torsional rigidity between the connecting beam 13 and the side beam 2 is reduced. In order to improve, the vertical vibration of the motor during traveling can be suppressed. In addition, the air spring 3 is
The torsional load generated by being present at a position offset from the side beam does not act on the side beams 2, and good performance is given to the roll vibration of the vehicle body 12. The air spring 3
Is installed with one air spring receiving beam 21, so that the weight increase of the carriage 11 can be minimized.

Although the air spring receiving beam 21 is shown in FIG. 1 as being provided in parallel with the horizontal beam 1, the purpose of installing the air spring receiving beam 21 is to reduce the vertical load of the air spring 3. It is not necessarily provided in parallel with the cross beam 1 because it is for supporting at two points and improving torsional rigidity.

In FIGS. 2 and 3, reference numeral 22 denotes a yaw damper, for example, an oil damper horizontally disposed in the same direction as the rail.
Are arranged. In the second bogie for railway vehicles of the present invention, one end of each of the yaw dampers 22 is connected to the bogie 11.
The torsion bar 8 is rotatably supported at both left and right ends, and the other end is pivotally connected to a damper receiving member 23 suspended from the vehicle body 12 via a rubber bush 24, for example. It is a thing.

That is, in the second bogie for a railway vehicle of the present invention, the yaw damper 22 is employed as a mounting arm of the anti-rolling device which is mounted horizontally, and the armature interposed between the mounting arm, that is, the yaw damper 22 and the vehicle body 12. , Body 1
As a damper receiving member 23 provided in a hanging shape from 2, the yaw damper function is added to the anti-rolling device by being rigidly connected to the vehicle body 12.

Therefore, when the vehicle body 12 and the bogie 11 move relative to each other in the vertical direction, the right and left yaw dampers 22 and the torsion rod 8 rotate integrally as shown in FIG. Is not bound. On the other hand, when the vehicle body 12 rolls, as shown in FIG. 2D, the torsion bar 8 is twisted to generate a torsional reaction force, thereby acting as an anti-rolling device.

The movement in the front-back direction is based on the rubber bush 2.
4 and the yaw damper 22, and the left-right movement is allowed by the axial movement of the torsion rod 8, since the torsion rod 8 is supported so as to be freely movable in the axial direction. become. Regarding the function of the yaw damper 22, it is needless to say that the yaw damper 22, which also serves as the mounting arm, is mounted almost horizontally, so that it functions as a normal yaw damper 22.

In the second railway vehicle bogie of the present invention, by adopting the above-described configuration, the function of a yaw damper can be added to the anti-rolling device. Therefore, the bogie 11 is provided with an anti-rolling device in addition to the yaw damper. Even in such a case, an increase in the weight of the cart 11 can be suppressed as much as possible.

Further, in the above-described embodiment, a bending moment acts on the contact portion between the piston 22b and the cylinder 22a of the yaw damper 22 due to its configuration. To avoid this, as shown in FIG. , The cylinder 22a and the body 22 are connected by, for example, a link 25 to form the yaw damper 22;
May be restricted with one degree of freedom. In this way, when rolling occurs between the trolley 11 and the vehicle body 12, the bending moment for applying torque to the torsion bar 8 is expressed as:
Since the cylinder 22a and the link 25 bear the burden, the damper receiving member 23 on the vehicle body side
Only the front-rear load is borne via c.

[0024]

As described above, the railway vehicle bogie according to the present invention is constructed as described above, so that the torsion load generated on the side beams due to the attachment of the air spring can be prevented, and the bogie and the yaw damper can be used. In addition, even when the anti-rolling device is provided, an increase in the weight of the bogie can be suppressed as much as possible.

Further, in the second railway vehicle bogie of the present invention, when the cylinder constituting the yaw damper and the piston are constrained with one degree of freedom, when rolling occurs between the bogie and the vehicle body, the vehicle body side The damper receiving member bears only the longitudinal load via the piston rod.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a bogie frame constituting a first bogie for a railway vehicle of the present invention.

FIG. 2 (a) is a perspective view for explaining an overall outline of a second railway vehicle bogie of the present invention, (b) is a partial view of (a) with a vehicle body added, and (c) is a vertical vibration. FIG. 4D is a diagram illustrating the state of the torsion bar and the yaw damper, and FIG. 4D is a diagram illustrating the state of the torsion bar and the yaw damper during rolling.

FIG. 3 is a diagram schematically illustrating a main part of another mode of the second railway vehicle bogie of the present invention.

FIG. 4 is a diagram showing a schematic configuration of a bogie frame constituting a conventional bogie for a railway vehicle.

FIG. 5 is a diagram illustrating a vibration mode generated by vertical vibration of a motor during traveling in a bogie frame constituting a conventional bogie for a railway vehicle.

FIG. 6 is a diagram showing a schematic configuration of a bogie for a railway vehicle disclosed in JP-A-61-241258.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross beam 2 Side beam 3 Air spring 8 Torsion rod 11 Dolly 12 Body 13 Connecting beam 21 Air spring receiving beam 22 Yaw damper 22a Cylinder 22b Piston 23 Damper receiving member 25 Link

Claims (3)

[Claims] 1. Side beams arranged on the left and right, two cross beams arranged before and after to fix the left and right side beams at a position where they do not interfere with a center pin and wheels connecting the bogie and the vehicle body, Two paired connecting beams that fix the two horizontal beams at a position where they do not interfere with the center pin and the left and right side beams, are fixed by each of these connecting beams and one side beam, and one end is connected to the side beam. A bogie for a railway vehicle, comprising one left and right air spring receiving beams that penetrate and protrude outside the side beams, and the air springs are supported by these air spring receiving beams. 2. One end of each of two yaw dampers arranged horizontally in the rail direction is located at a predetermined distance from the rotation center of the bogie, and is rotatable substantially parallel to the axle and with respect to the bogie. A bogie for a railway vehicle, characterized in that the torsion rods arranged as described above are pivotally supported on both left and right ends, respectively, and the other ends of the respective yaw dampers are pivotally connected to a damper receiving member hanging down from the vehicle body. 3. The bogie for a railway vehicle according to claim 2, wherein the cylinder constituting the yaw damper and the piston are restrained with one degree of freedom.