JPH11124032A - Steering truck for railroad car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a car axis from being steered even if the car body moves in the vertical or horizontal direction relative to the truck frame. SOLUTION: Circular movement of a car 1 in the yawing direction that is generated against a truck frame 3 when the car is running on a curved railway is transmitted to a spindle 12L of a steering mechanism 10L via a transmission link 20L. The transmission link 20L has: a first link, where the base end is axially supported by the car and which is integrally displaced with the car 1 in the yawing direction, and also where the sliding end slides freely vertically; a second link 22, where the base end is axially supported by the spindle 12 of the steering mechanism 10L and which rotates integrated with the spindle 12, and where the sliding end slides freely vertically; and a flexing joint 23, which allows the spindle 12 to move, that connects to the first and second links so that it is freely flexible and the circular movement in the yawing direction integrated with the car of the first link is transmitted to the second link 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes the turning of a vehicle body in the yawing direction with respect to a bogie frame when a railway vehicle travels on a curved road, and the axis of the axle passes through the center of curvature of the curved road. As for a railway vehicle steering bogie having a steering mechanism to steer the axle as described above, more specifically, the axle is not steered even if the vehicle body is vertically displaced relative to the bogie frame in the up-down direction or the left-right direction, The present invention relates to a railway vehicle steering bogie improved so as to enable stable straight running.

[0002]

2. Description of the Related Art Conventionally, when a railway vehicle travels on a curved road, the axle is steered so that the axis of the axle passes through the center of curvature of the curved road by utilizing the rotation of the vehicle body with respect to a bogie frame in the yawing direction. By doing so, various types of railcar steering bogies capable of running smoothly and at high speed on curved roads have been proposed.

Since the body of a railway vehicle is elastically supported by a bogie frame via a pillow spring (air spring), the vehicle body is displaced vertically and horizontally relative to the bogie frame due to vibrations during traveling. . Thus, if the steering mechanism for steering the axle is directly connected to the vehicle body, the axle is steered even when traveling on a straight path, which is not preferable in terms of running stability.

Therefore, a steering bogie for a railway vehicle improved so that the steering mechanism does not operate even when the vehicle body is displaced relative to the bogie frame is disclosed in, for example, JP-A-4-87873 and JP-A-4-87874. And so on.

[0005]

However, Japanese Patent Application Laid-Open Nos. 4-87873 and 4-8787 mentioned above.
The steering bogie for a railway vehicle described in Japanese Patent Publication No. 4 is configured to connect the vehicle body and the steering mechanism via a link mechanism provided on the vehicle body side, and if the vehicle body side structure is complicated, I have no choice. Also, since the link mechanism provided on the vehicle body side has a structure that absorbs the relative displacement of the vehicle body with respect to the bogie frame, the rotation of the vehicle body with respect to the bogie frame in the yawing direction is reliably transmitted to the steering mechanism. Is difficult.

Accordingly, the present invention provides a steering mechanism which does not steer the axle even if the vehicle body is displaced vertically and horizontally relative to the bogie frame, and controls the rotation of the vehicle body with respect to the bogie frame in the yawing direction. An object of the present invention is to provide a steering bogie for a railway vehicle provided with a steering mechanism capable of accurately transmitting the steering to a steering mechanism and accurately steering the axle so that the axis of the axle passes through the center of curvature of a curved road.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a steering bogie for a railway vehicle according to the present invention is provided with a yaw direction rotation of a vehicle body with respect to a bogie frame when the railway vehicle travels on a curved road. And a steering mechanism for steering the axle so that the axis of the axle passes through the center of curvature of the curved road.
The steering mechanism includes a steering lever attached to the bogie frame and supported by a vertically extending support shaft so as to swing in the front-rear direction of the bogie frame, a swing end of the steering lever, and an end of the axle. And a transmission link for transmitting the rotation of the vehicle body in the yawing direction with respect to the bogie frame to the support shaft to swing the steering lever. The transmission link has a base end pivotally supported by the vehicle body and is displaced integrally with the vehicle body in the yawing direction, and a first link whose swinging end is swingable in a vertical direction; A second link having a base end pivotally supported by a support shaft of the mechanism and rotating integrally with the support shaft, and having a swinging end swingable in a vertical direction;
And the swing end of the second link is connected to the swing end of the second link so as to bend freely, and the rotation of the first link in the yawing direction integral with the vehicle body is transmitted to the second link. And a bending joint.

That is, when the railcar steering bogie according to the present invention travels on a curved road, the vehicle body turns in the yawing (swinging around the vertical axis) direction with respect to the bogie frame. The rotation of the vehicle body in the yawing direction is transmitted to the support shaft via the transmission link, and swings the steering lever. When the steering lever swings, the steering link connected to the swing end displaces the axle box in the front-rear direction to steer the axle, so that the axis of the axle passes through the center of curvature of the curved path. Thereby, the steering bogie for a railway vehicle of the present invention can run smoothly and at high speed on a curved road.

However, even if the vehicle body of the railcar steering bogie according to the present invention is displaced vertically or horizontally relative to the bogie frame, the first and second links only swing freely in the vertical direction. Therefore, since the pivot of the steering mechanism is not rotated, the steering mechanism does not steer the axle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A steering bogie for a railway vehicle according to an embodiment of the present invention will be described below in detail with reference to FIGS. 1 is an overall side view of a railway vehicle steering bogie according to an embodiment of the present invention, FIG. 2 is an overall plan view of the railway vehicle steering bogie shown in FIG. 1, and FIG. 3 is a steering mechanism and a transmission link. FIG. 4 is a perspective view showing the structure of the transmission link shown in FIG. In the following description, the traveling direction of the railcar steering bogie is simply referred to as “front-back direction”, and the width direction of the railcar steering bogie is simply referred to as “lateral direction”. Specifically, the left direction in FIGS. 1 and 2 is referred to as a front direction, the right direction in the drawing is referred to as a rear direction, and the upper side in FIG.
Also, the reference numeral of the member arranged on the front side is "f",
The reference numeral of the member disposed on the rear side is denoted by “r”, the reference numeral of the member disposed on the left side is denoted by “L”, and the reference numeral of the member disposed on the right side is denoted by “R”.

As shown in FIGS. 1 and 2, in a steering vehicle 100 for a railway vehicle according to this embodiment, a vehicle body 1 of a railway vehicle is elastically supported on a bogie frame 3 by an air spring 2 as a pillow spring. I have. A pair of front and rear axles 5f, 5r rotatably supporting the wheels 4 rolling on the rail K.
Is a total of four axle boxes 6fL, 6f
The ends are supported by R, 6rL, and 6rR, respectively. In addition, these shaft boxes 6fL, 6fR,
A coil spring 7 as a shaft spring and a shock absorber 8 are interposed between 6rL, 6rR and the spring receiving portion 3a of the bogie frame 3, respectively. Furthermore, the wheels 4
Each of them is rotationally driven by a drive motor 9 of a DDM (direct drive motor) type.

When the railcar steering bogie 100 of this embodiment travels on a curved road, a pair of front and rear axles 5f, 5r
Is steered by the steering mechanism so that its axis passes through the center of curvature of the curved road. The steering mechanism includes a pair of front and rear axle boxes 6fL, 6fL supporting the left end sides of the pair of front and rear axles 5f, 5r.
A left steering mechanism 10L for displacing 6rL in the front-rear direction;
The right and left axle boxes 6fR and 6rR which support the right end sides of the pair of front and rear axles 5f and 5r are composed of a right steering mechanism 10R for displacing the front and rear axle boxes 6fR and 6rR in the front and rear direction. The left steering mechanism 10L will be described.

As shown in FIGS. 3 and 4, the left steering mechanism 10L is rotatably attached to a bracket 11L fixed to a left side beam 3bL of the bogie frame 3.
It has a support shaft 12L extending in the vertical direction. A steering lever 13L extending in the left-right direction is fixed to the support shaft 12L, and is swingable in the front-rear direction. And
The inner end of the steering lever 13L and the left front axle box 6fL
And are connected by a first steering link 14L. The outer end of the steering lever 13L and the left rear axle box 6rL are connected by a second steering link 15L. Accordingly, when the steering lever 13L is swung in a horizontal plane such that the inner end of the steering lever 13L is swung rearward, the left front axle box 6fL and the left rear axle box 6rL are brought closer to each other. On the other hand, the steering lever 1
The steering lever 13 is moved so that the inner end of the 3L swings forward.
When L is swung in the horizontal plane, the left front axle box 6fL and the left rear axle box 6rL are separated from each other.

On the other hand, the support shaft 12L of the left steering mechanism 10L configured as described above is connected to the vehicle body 1 via a left transmission link 20L. The left transmission link 2
0L is a spherical joint 2 for connecting the first and second links 21 and 22 and the swinging ends of these links to bend freely.
And 3.

As shown in FIG. 4, the first link 21 is an A-shaped arm whose base end is branched into two branches, and is disposed so as to avoid interference with the air spring 2. The base ends 21a, 21b are pivotally supported by a pair of front and rear brackets 24, 24 provided on the lower surface of the vehicle body 1, and supported by a support shaft 25 extending in the front-rear direction. Further, a vertically penetrating hole for receiving the spherical joint 23 is provided in the swinging end 21c which can be vertically displaced.

On the other hand, the second link 22 has a strip shape as shown in FIG. And the base end 22
a is swingably supported by a portion 26 extending in the front-rear direction of a cross shaft formed integrally with the support shaft 12L of the steering mechanism 10L. A vertically extending shaft portion 22c extends from the swinging end 22b which is vertically movable.

The spherical joint 23 has a housing 23
a is housed in the through hole of the first link 21 and is screwed in a state where the shaft portion 22c of the second link passes through the ball portion 23b slidably fitted in the housing 23a. Is being worn.

Next, the operation of the railway vehicle steering bogie 100 of the present embodiment configured as described above will be described.

When the steering vehicle 100 according to the present embodiment travels on a curved road, the vehicle body 1 rotates in the yawing direction with respect to the bogie frame 3. Accordingly, the first link 21 of the transmission link 20 is displaced in the yawing direction together with the vehicle body 1. At this time, since the spherical joint 23 is configured to be able to transmit the rotation of the first link in the yawing direction to the second link, the second link 22 rotates together with the first link. It turns in the yawing direction. Then, the support shaft 12L of the steering mechanism 10L is rotated by the second link 22, and the steering lever 13L is swung in the front-rear direction in the horizontal plane. Thereby, a pair of front and rear axles 5f,
5r is steered so that its axis passes through the center of curvature of the curved road, so that the railcar steering bogie 100 of the present embodiment is operated.
Can smoothly and quickly travel on curved roads.

A pair of left and right transmission links 20L, 20L
R is a pair of left and right steering mechanisms 1 without rattling.
0L and 10R, the pair of left and right steering mechanisms 1
0L and 10R can be reliably linked. Therefore, in the steering bogie 100 for a railway vehicle of the present embodiment, the axles 5f, 5r can be accurately steered so that the axes of the pair of front and rear axles 5f, 5r surely pass through the center of curvature of the curved road. The traveling performance when traveling on a curved road can be further improved.

On the other hand, the vehicle body 1 elastically supported by the bogie frame 3 via the air spring 2 is displaced vertically and horizontally relative to the bogie frame 3 by vibrations generated by running. At this time, the relative displacement of the vehicle body 1 in the vertical and horizontal directions with respect to the bogie frame 3 and the rotation in the rolling direction are absorbed by the vertical swings of the first and second links 21 and 22, and the steering mechanism 10L Is not rotated. The rotation of the vehicle body 1 with respect to the bogie frame 3 in the pitching direction is performed by the first and second links 21 and 22.
A twist between the spherical joints 23
And does not rotate the support shaft 12L of the steering mechanism 10L.

That is, in the steering bogie 100 for a railway vehicle of the present embodiment, only the rotation of the vehicle body 1 with respect to the bogie frame 3 in the yawing direction is a pair of left and right steering mechanisms 10L and 10L.
The support shafts 12L and 12R of the pair of left and right steering mechanisms 10L and 10R are not rotated by rotating the support shafts 12L and 12R of the R and the relative displacement of the vehicle body 1 with respect to the bogie frame 3 in the vertical and horizontal directions. Thus, when the railcar steering bogie 100 of the present embodiment travels on a straight path, even if the vehicle body 1 is displaced vertically and horizontally relative to the bogie frame 3, the steering mechanisms 10L and 10R move back and forth. A pair of axles 5f, 5
Since the steering wheel r is not steered, the steering bogie 100 for a railway vehicle of the present embodiment can not only run stably on a straight path but also improve the riding comfort.

As mentioned above, one embodiment of the steering bogie for a railway vehicle according to the present invention has been described in detail. However, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications are possible. . For example, in the embodiment described above, the first and second links 21 and 22
Are connected using a spherical joint 23, but they can also be connected using a cross joint.

In the above-described embodiment, the first
The second links 21 and 22 are swingably supported by support shafts 25 and 26 extending in the front-rear direction, but the direction in which the support shafts 25 and 26 extend is not limited to the front-rear direction.

Further, in the above-described embodiment, the support shafts 12L, 12R of the steering mechanisms 10L, 10R extend in the up-down direction. However, by appropriately disposing the first and second links 21, 22, the support shafts are provided. 12L and 12R may be arranged to extend horizontally.

[0026]

As is apparent from the above description, the steering bogie for a railway vehicle according to the present invention uses the transmission link to rotate the vehicle body in the yawing direction that occurs with respect to the bogie frame when passing on a curved road. To the steering mechanism to steer the axle, and the relative displacement of the vehicle body in the up-down direction and the left-right direction with respect to the bogie frame, the first and second swings of the first and second links constituting the transmission link, This is a structure that absorbs by bending of the bending joint that connects the second link. Thus, in the steering bogie for a railway vehicle according to the present invention, the steering mechanism does not steer the axle even if the vehicle body is displaced vertically and horizontally relative to the bogie frame, thereby enabling stable running. Not only can it be done, but it can also improve the riding comfort. Further, in the steering bogie for a railway vehicle according to the present invention, the turning of the vehicle body with respect to the bogie frame in the yawing direction is not performed until the steering mechanism is reliably transmitted to the steering mechanism via the transmission link only when traveling on a curved road. Transmitted and the steering mechanism steers the axle. Thus, in the steering bogie for a railway vehicle of the present invention, the steering mechanism can steer the axle only when traveling on a curved road, and can travel smoothly and quickly on a curved road. Further, according to the present invention, it is possible to provide a steering bogie for a railway vehicle, which has a simple structure, a small number of parts, a lightweight, low-cost, and rattling-free steering mechanism.

[Brief description of the drawings]

FIG. 1 is an overall side view of a railway vehicle steering bogie according to an embodiment of the present invention.

FIG. 2 is an overall plan view of the railcar steering bogie shown in FIG. 1;

FIG. 3 is a front view showing a mounted state of a steering mechanism and a transmission link.

FIG. 4 is a perspective view showing the structure of the transmission link shown in FIG. 3;

[Explanation of symbols]

 K rail 1 body 2 air spring 3 bogie frame 4 wheel 5 axle 6 axle box 7 coil spring 8 shock absorber 9 drive motor 10 steering mechanism 11 bracket 12 support shaft 13 steering lever 14, 15 steering link 20 transmission link 21 first link 22 Second Link 23 Spherical Joint 24 Bracket 25, 26 Support 100 Steering Truck for Railway Vehicle According to the Present Invention

Claims (3)

[Claims] An axle is steered so that an axis of an axle passes through a center of curvature of the curved road by utilizing rotation of the vehicle body in a yawing direction generated with respect to a bogie frame when the railway vehicle travels on a curved road. A steering lever that is supported by a support shaft attached to the bogie frame so as to be capable of swinging in the front-rear direction of the bogie frame, and a shaft that supports a swing end of the steering lever and an end of the axle. A steering link for connecting a box and a transmission link for transmitting rotation of the vehicle body with respect to the bogie frame in the yawing direction to the support shaft to swing the steering lever; A first link whose base end is pivotally supported and is displaced integrally with the vehicle body in the yawing direction, and whose swing end is freely swingable in the vertical direction; and a base end pivotally supported on a support shaft of the steering mechanism. And rotate integrally with the support shaft. In addition, a second link whose swing end is vertically swingable, and a swing end of the first link and a swing end of the second link are flexibly connected to each other. A steering bogie for a railway vehicle, comprising: a bending joint capable of transmitting a rotation of a first link in a yawing direction integral with the vehicle body to the second link. 2. The steering bogie according to claim 1, wherein the bending joint is a spherical joint. 3. The steering bogie according to claim 1, wherein the bending joint is a cross joint.