JPH0515591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a bogie for a railroad vehicle, and particularly to a bogie for a railroad vehicle suitable for a so-called bolsterless type bogie that does not use a swing pillow.

[Background of the invention]

Conventionally, in railway bogies, when running on a curved track, the lateral pressure that acts on the wheel axle, that is, the force that pushes the rail in the horizontal direction, is reduced, and at the same time, the angle formed between the rail and the wheels when running on a curved track, that is, the angle of attack, is reduced. In order to do this, there is a known system that uses steering to rotate the entire truck or wheel shaft in a horizontal plane. Among these structures, the structure for steering the wheel axle (for example, Japanese Patent Publication No. 11538/1983) has the risk of complicating the structure for supporting the wheel axle. In addition, the system that steers the entire bogie has a structure in which horizontal force is applied behind the center of rotation of the bogie in the direction of travel. It is necessary to provide a member for transmitting the force for causing the rotation, and the structure is complicated, which is disadvantageous in terms of manufacturing and maintenance.

On the other hand, as a device for rotating the cart,
A structure is being developed in which the static center of rotation of the truck is actively shifted rearward in the direction of travel, and the direction in which the center of rotation is shifted is switched depending on the direction of travel of the vehicle, but this has not yet been realized.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a bogie for a railway vehicle that can reduce the lateral force between the rail and the wheel set while traveling on a curved track, and can reduce the angle of attack between the rail and the wheels.

[Summary of the invention]

The present invention supports a bogie frame 2 on a pair of wheel axles,
A bolster-less railway vehicle bogie that supports a car body 5 on the bogie frame 2 via an air spring and includes a link 7 that is installed at the center of rotation of the bogie and connects the bogie frame 2 and the car body 5, wherein the link Reference numeral 7 denotes rubber bushes 10, 13 contained in annular parts 9, 12 formed at both ends thereof, and a pin 1 passing through the rubber bushes 10, 13.
1 and 14, and an annular portion 9 at one end of the link 7 on the lower surface of the vehicle body 5.
A bracket 6 is arranged facing both end faces of the link 7 and connected to the pin 11, and a bracket 6 is arranged to face the both end faces of the annular portion 13 at the other end of the link 7. a bracket 8 arranged and coupled to said pin 14;
and each annular portion 9 of the bracket 6 and the bracket 8 and the link 7 installed on the link 7,
a wedge beam 16 whose end portion can be inserted between the wedge beam 16 and the bracket 13 and which suppresses the relative inclination of the link 7 with respect to the brackets 6 and 8 in a horizontal plane when inserted; The wedge beam 1
The front end of the link 6 in the vehicle traveling direction is comprised of driving means 18, 19, 21 inserted between the annular portion 9 or 13 of the link and the bracket 6 or 8.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In the figure, the truck is composed of a pair of wheelsets 1 and a truck frame 2, and the truck is rotatably connected to a vehicle body 5 in a horizontal plane. Note that the bogie and the vehicle body 5 are connected by a bolsterless method that does not use a rocking pillow. That is, the vehicle body 5 and the bogie are connected by an integral link 7. The link 7 transmits longitudinal force between the vehicle body 5 and the bogie.
An annular portion 9 having a rubber bush 10 therein is formed at one end of the link 7, and is connected to a bracket 6 provided on the bottom surface of the vehicle body 5 with a bolt 15 via a pin 11 inserted into the rubber bush 10. Also, a rubber button 13 is attached to the other end of the link 7.
An annular portion 12 is formed, and is connected to a bracket 8 attached to the bogie frame cross beam 4 by a bolt 15 via a pin 14 inserted into the rubber bush 13. The above-mentioned structure is that of a conventional bolsterless type truck. This truck structure is further provided with a wedge beam 16 that swings via a pin 17 at the intermediate portion of the link 7. One end of the wedge beam 16 is configured to be insertable between the link 7 and the bracket 6, thereby suppressing relative displacement. Further, the other end of the wedge beam 16 is a link 7
It is formed so that it can be inserted between the bracket 8 and the bracket 8, and is configured to suppress relative displacement. In addition,
The operation of the wedge beam 16 is controlled by actuators 18,
19 and a switching valve 21 that operates these. The actuators 18 and 19 have one end attached to a support beam 20 provided on the bogie frame cross beam 4, and the other end connected to the wedge beam 16 by pins. Further, the switching valve 21 is controlled by using as control input information about forward and backward movement and information about entering a curved road from the main controller.

The operation of such a configuration will be explained.

As will be clear from the explanation below, when traveling in a straight line, the actuator 18,
19 is located between the maximum length and the minimum length, and the wedge beam 16 does not have any direct effect on the brackets 6 and 8. And bracket 6 and link 7
Since there are rubber bushings 10 and 13 between the bracket 8 and the link 7, respectively, the bracket 6 can be displaced relative to the link 7, and the bracket 8 can be displaced relative to the link 7. Therefore, the truck (cross beam 4) can rotate with respect to the vehicle body 5 around the center between the rubber bushes 10 and 13 (near the pin 17).

Now, when the vehicle is traveling in the direction of arrow A in FIGS. 1 and 2 and approaches a curved trajectory, the actuator 18 is extended and the actuator 19 is contracted by the switching valve 21. As a result, the wedge beam 16 rotates so that its left end in FIG. 2 fits into the space between the annular portion 9 of the link 7 and the bracket 6. This state is shown on the left side of FIG. Therefore, the annular portion 9 of the link 7 is fixed to the bracket 6 through the fitting portion of the wedge beam 16, so that relative displacement between the link 7 and the bracket 6 is suppressed. On the other hand, at this time, as shown on the right side of FIG. 3, since the wedge beam 16 is not inserted between the link 7 and the bracket 8,
Displacement is possible between the link 7 and the bracket 8.

That is, the annular portion 9 of the link 7 and the bracket 6
Since the wedge beam 16 is fitted between the link 7 and the bracket 6, the link 7 cannot tilt in the horizontal plane with respect to the bracket 6. Therefore, although the link 7 is allowed to rotate in the vertical direction relative to the vehicle body 5, rotation in the horizontal plane is suppressed. On the other hand, since a distance is secured between the link 7 and the bracket 8, rotation in the vertical and horizontal directions is permitted. Therefore, the truck (cross beam 4) rotates with respect to the vehicle body 5 around the connecting portion (rubber bush 13) between the link 7 and the bracket 8. That is, the center of rotation of the truck moves rearward with respect to the traveling direction of the vehicle. Furthermore, when the vehicle travels on a curve, centrifugal force acts on the vehicle body 5, and this centrifugal force is transmitted from the link 7 to the bracket 8, so that the bogie is moved around the curve at a position on the rear side of the center of the bogie in the direction of travel. Since it is pushed outward, the steering action of the truck itself is facilitated.

On the other hand, on a curved track, the vehicle moves toward arrow B in the figure.
When traveling in the direction, actuator 18,1
The expansion and contraction of 9 is in the opposite direction to the above. Therefore, relative displacement between link 7 and bracket 8 is suppressed, while relative displacement between link 7 and bracket 6 is possible. Therefore, the center of rotation of the truck moves rearward with respect to the traveling direction of the vehicle.

In this manner, when traveling on the axial track, the center of rotation of the bogie relative to the vehicle body 5 can be moved rearward in the traveling direction of the vehicle. Therefore, the distance from the center of rotation of the truck that has moved rearward in the running direction to the wheels on the front side in the running direction increases. Therefore, as described above, the turning moment acting on the truck increases, making it easier for the truck to rotate along the curve.

In this way, the bogie becomes easier to rotate, and when the bogie rotates, the central axes of the pair of wheel sets 1, 1 are directed toward the center of curvature of the track, and the lateral pressure on the pair of wheel sets 1, 1 is uniform. , the maximum lateral force can be reduced. In addition, as mentioned above, since the center axis of the wheel set 1 is directed toward the center of curvature of the track, the rail and wheel set 1
The impact angle with the Furthermore, in the above-described configuration, both ends of the link 7 will not be in a restrained state at the same time, and in the unlikely event that the actuators 18, 1
Even if a malfunction occurs in the control system 9, etc., the lateral force will increase slightly, but safety can be ensured because the bogie can rotate relative to the vehicle body.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reduce the lateral pressure between the rail and the wheel set when the vehicle runs on a curved track, and it is also possible to reduce the angle of attack between the rail and the wheel.

[Brief explanation of the drawing]

1 is a plan view showing an embodiment of the cart according to the present invention, FIG. 2 is a side view of the link portion of the cart shown in FIG. 1, FIG. 3 is a plan view of the link portion of the cart shown in FIG. 2, and FIG. 2 is a hydraulic circuit diagram showing a control system of the actuator shown in FIG. 2. FIG. 1... Wheel axle, 2... Bogie frame, 4... Bogie frame cross beam, 6, 8... Bracket, 7... Link, 16
... Wedge beam, 18, 19... Actuator.

Claims (1)

[Claims] 1. A bogie frame 2 is supported on a pair of wheel axles, a car body 5 is supported on the bogie frame 2 via an air spring, and the bogie frame 2 and the car body 5 are installed at the center of rotation of the bogie. In a bolster-less railway vehicle bogie, the link 7 includes rubber bushings 10, 13 contained in annular parts 9, 12 formed at both ends thereof, and a pin 1 passing through the rubber bushings 10, 13.
1 and 14, and an annular portion 9 at one end of the link 7 on the lower surface of the vehicle body 5.
A bracket 6 is arranged facing both end faces of the link 7 and connected to the pin 11, and a bracket 6 is arranged to face the both end faces of the annular portion 13 at the other end of the link 7. a bracket 8 arranged and coupled to said pin 14;
and each annular portion 9 of the bracket 6 and the bracket 8 and the link 7 installed on the link 7,
a wedge beam 16 whose end portion can be inserted between the wedge beam 16 and the bracket 13 and which suppresses the relative inclination of the link 7 with respect to the brackets 6 and 8 in a horizontal plane when inserted; The wedge beam 1
A bogie for a railway vehicle, characterized in that the front end of the link 6 in the vehicle traveling direction is constituted by driving means 18, 19, 21 for inserting the front end of the link between the annular portion 9 or 13 of the link and the bracket 6 or 8. .