JPH11124033A - 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 against the truck frame. SOLUTION: This steering truck for a railroad car is provided with a steering mechanism 10L that steers a pair of front and rear car axis 5f and 5r, a gear mechanism 20 and a transmission axis 30L that transmit the circular movement of a car body 1 in the yawing direction that is generated against the truck frame 2 when the car is running on the curved railway. The transmission axis 30L has flexing joints 31 and 32 that absorb circular movement in rolling and pitching directions of the car 1 against the truck frame 3 but can transmit the circular movement in the yawing direction, and a sliding joint 33 that absorb the change in relative distance of the car 1 against the truck frame 3 but can transmit the circular movement in the yawing direction.

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 an axle to a steering mechanism and accurately steering the axle so that the axis of the axle passes 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 supported by a support shaft attached to the bogie frame so as to be swingable 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 connecting a box, and 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. One end is fixed to the vehicle body and the other is And a transmission shaft extending in the up-down direction and having an end connected to the support shaft. The transmission shaft absorbs the rotation of the vehicle body in the rolling direction and the pitching direction with respect to the bogie frame, but can transmit the rotation in the yawing direction, and a change in the relative distance of the vehicle body to the bogie frame. It has a slide joint that absorbs but can transmit rotation in the yawing direction.

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. Then, the rotation of the vehicle body in the yawing direction is transmitted to the support shaft via the transmission shaft, 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.

On the other hand, even if the vehicle body of the railcar steering bogie according to the present invention is displaced up and down or left and right with respect to the bogie frame, the bending joint of the transmission shaft causes the rolling of the vehicle body with respect to the bogie frame. Rotation in the direction of swinging around the front-rear axis and in the pitching direction (swinging around the left-right axis) is not transmitted to the support shaft of the steering lever. The slide joint of the transmission shaft is
A change in the relative distance between the vehicle body and the bogie frame due to the relative displacement of the vehicle body in the vertical and horizontal directions with respect to the bogie frame is absorbed and is not transmitted to the support shaft of the steering lever. Accordingly, even if the vehicle body of the railcar steering bogie of the present invention is displaced vertically or horizontally relative to the bogie frame, the steering lever does not swing and steer the axle. The steering bogie for a railway vehicle can run stably on a straight road.

The bent joint is a first cross joint connected to the vehicle body and a second cross joint connected to the support shaft, and the slide joint is the first and second cross joints. Ball spline interposed between,
Alternatively, it can be a slide spline. Further, the bent joint and the slide joint may be, for example, a BJ (bar field joint) or RZJ (zeppa joint) as a fixed type constant velocity joint, or a DOJ (double offset joint) as a sliding type (sliding type) constant velocity joint. ), TJ (tripod joint) or VL
With J (cross groove joint), the rotation of the vehicle body in the yawing direction with respect to the bogie frame can be transmitted to the support shaft of the steering lever very accurately.

Further, if the transmission shaft is connected to the support shaft of the steering lever via a gear mechanism, the rotation of the transmission shaft extending in the vertical direction in the yawing direction is transmitted to the support shaft extending in the horizontal direction. In addition to the above, the transmission ratio of the rotation angle can be appropriately changed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a steering bogie for a railway vehicle according to an embodiment of the present invention will be described in detail with reference to FIGS. Here, 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 railway vehicle steering bogie shown in FIG. 1, and FIG. 3 is a steering mechanism and a transmission shaft. FIG. 4 is an enlarged view of the steering mechanism and the transmission shaft shown in FIG. 3. 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 a forward direction, the right direction in the drawings is a rear direction, and FIGS.
, The upper side in the figure is called the right side, and the lower side in the figure is called the left side. In addition, the reference numeral of the member disposed on the front side is “f”, the reference numeral of the member disposed on the rear side is “r”, and the reference numeral of the member disposed on the left side is “L”. , The reference numerals of the members arranged on the right side are denoted by “R”.

As shown in FIG. 1 and FIG. 2, in a railway vehicle steering bogie 100 of 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 and 5r are used.
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-side steering mechanism 10L is provided on the left side beam 3bL of the bogie frame 3 so as to be rotatable and attached to a bracket 11L. And a support shaft 12L extending horizontally. A vertically extending steering lever 13L is fixed to the support shaft 12L so as to be swingable in the longitudinal direction of the bogie frame 3. The pin 16 provided at the lower end of the steering lever 13L and the left front axle box 6fL are connected by a first steering link 14L. The pin 16 provided at the upper end of the steering lever 13L and the left rear axle box 6rL are connected by a second steering link 15L. Thereby, when the steering lever 13L is swung so that the upper end of the steering lever 13L swings forward,
The left front axle box 6fL and the left rear axle box 6rL are moved closer to each other. On the other hand, when the steering lever 13L swings so that the upper end of the steering lever 13L swings backward, the left front shaft box 6fL and the left rear shaft box 6rL are separated from each other.

On the other hand, the outer end of the support shaft 12L of the steering mechanism 10L is connected to the gear mechanism 20L. The gear mechanism 20L includes a pair of bevel gears 2 meshing with each other in a gear box 21 connected to the bracket 11L.
2,23. The support shaft 12L rotates integrally with one bevel gear 22. The other bevel gear 23 rotates integrally with a driven shaft 24 that extends in the vertical direction perpendicular to the support shaft 12L. Thus, by driving and rotating the driven shaft 24, the support shaft 12L of the steering mechanism 10L can be rotated to swing the steering lever 13L in the front-rear direction.

Further, the driven shaft 2 of the gear mechanism 20L
4 is connected to the vehicle body 1 via the transmission shaft 30L.
The transmission shaft 30 </ b> L is screwed to a plate 25 fixed to the upper end of the driven shaft 24, and is connected to a first cross joint 31 as a bending joint and a vehicle body 1 as a bending joint. The second cross joint 32 and the first and second
And a ball spline 33 as a slide joint interposed between the cross joints 31 and 32 of FIG.

The first cross joint 31 includes a first yoke 34 screwed to the plate 25 and a second yoke connected to the first yoke 34 via a first cross shaft 35. 36, while absorbing the relative rotation of the vehicle body 1 in the rolling direction and the pitching direction with respect to the bogie frame 3,
The rotation in the yawing direction can be transmitted to the driven shaft 24. In addition, the second cross joint 32
It has a third yoke 37 screwed to the vehicle body 1 and a fourth yoke 39 connected to the third yoke 37 via a second cross shaft 38. While absorbing the relative rotation in the rolling direction and the pitching direction, the rotation in the yawing direction is performed by the ball spline 33.
It can be transmitted to.

The ball spline 33 has a shaft 41 which rotates integrally with the second yoke 36 and a tube 42 which rotates integrally with the fourth yoke 39. A large number of balls are interposed between a male spline formed on the outer peripheral surface of the shaft 41 and a female spline formed on the inner peripheral surface of the tube 42. Accordingly, the ball spline 33 allows the shaft body 41 and the pipe body 42 to smoothly displace relative to each other in the axial direction,
A rotational torque can be transmitted between the shaft 41 and the tube 42 around the axis thereof.

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

When the railway vehicle steering bogie 100 of the present embodiment travels on a curved road, the vehicle body 1 rotates in the yawing direction with respect to the bogie frame 3. The rotation of the vehicle body 1 in the yawing direction is transmitted to the pair of left and right gear mechanisms 20L, 20R without backlash by the pair of left and right transmission shafts 30L, 30R, respectively, to rotate the pair of left and right driven shafts 24L, 24R. The rotation of the pair of left and right driven shafts 24L, 24R about the vertical axis is performed by a pair of bevel gears 2 meshing with each other.
A pair of left and right support shafts 12L extending horizontally through
12R, and a pair of left and right steering levers 13L, 13L
R is rocked. As a result, the pair of front and rear axles 5f and 5r are steered such that their axes pass through the center of curvature of the curved road.
00 can travel on curved roads smoothly and at high speed.

Also, a pair of left and right transmission shafts 30L, 30R
Is a pair of left and right steering mechanisms 10 without rattling.
L, 10R, the pair of left and right steering mechanisms 10
L 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 causes
It is displaced relative to the bogie frame 3 in the vertical and horizontal directions. At this time, the rotation of the vehicle body 1 in the rolling direction and the pitching direction with respect to the bogie frame 3 is performed by the transmission shafts 30L and 30L.
The driven shafts 24L, 24R of the gear mechanisms 20L, 20R are absorbed by the first and second cruciform joints 31, 32 of R.
R is not rotated. The change in the relative distance between the bogie frame 3 and the vehicle body 1 is determined by the transmission shafts 30L and 30R.
And the driven shafts 24L, 24R of the gear mechanisms 20L, 20R do not rotate. Accordingly, in the steering bogie 100 for a railway vehicle of the present embodiment, relative displacement of the vehicle body 1 in the up-down direction and the left-right direction with respect to the bogie frame 3 does not activate the pair of left and right steering mechanisms 10L, 10R. Thus, the railway bogie 100 according to the present embodiment can stably travel on a straight path.

Further, the steering bogie 1 for a railway vehicle of the present embodiment.
In 00, the rotation of the vehicle body 1 in the yawing direction with respect to the bogie frame 3 is converted into the rotation in the pitching direction using the gear mechanisms 20L and 20R, and the rotation is performed on the horizontally extending support shafts 12L and 12R of the steering mechanisms 10L and 10R. It has a structure to transmit. Thereby, the steering bogie 10 for a railway vehicle of the present embodiment is
0, as shown in FIG.
The OR and the steering mechanisms 10L, 10R can be compactly put together within the vehicle limit line G.

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 above-described embodiment, the transmission shafts 30L and 30R are configured by the first and second cross joints 31 and 32 and the ball spline 33. On the other hand, the first cross joint 31
(Double offset joint), TJ (tripod joint) or VL as a sliding type (sliding type) constant velocity joint
J (cross groove joint) and the like, and the second cross joint 32 is a BJ as a fixed type constant velocity joint.
(Bar field joint), RZJ (zeppa joint) and the like. By using these constant velocity joints, the rotation of the vehicle body 1 in the yawing direction with respect to the bogie frame 3 can be accurately transmitted to the steering mechanism 10 regardless of the magnitude of the bending angle generated at the bending joint.

In the above-described embodiment, the transmission shafts 30L and 30R are attached to the left and right ends of the vehicle body 1, respectively. The bending angle of the bending joint can be minimized.

Further, if the pair of left and right support shafts 12L, 12R of the steering mechanisms 10L, 10R are integrated, one transmission shaft 3
This support shaft can also be integrally rotated by the zero and one gear mechanism 20. In this case, a pair of left and right steering mechanisms 1
Since 0L and 10R can be linked more accurately, the pair of front and rear axles 5f and 5r can be steered more accurately.

In the above-described embodiment, the support shaft 12 for swingably supporting the steering levers 13L and 13R is provided.
L, 12R extend in the vertical direction so that the steering mechanism 10L,
10R, and these support shafts 12L, 12L.
The transmission shafts 30L and 30R can be directly connected to R.

[0029]

As is apparent from the above description, the steering bogie for a railway vehicle according to the present invention uses the transmission shaft to rotate the vehicle body in the yawing direction with respect to the bogie frame when passing on a curved road. The steering shaft is transmitted to the steering mechanism to steer the axle, the bending joint provided on the transmission shaft absorbs the turning of the vehicle body in the rolling direction and the pitching direction with respect to the bogie frame, and the bogie frame and the body are rotated by the slide joint provided on the transmission shaft. And a structure for absorbing a change in the relative distance between them. 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 of the present invention, only when the turning of the vehicle body in the yawing direction with respect to the bogie frame is caused by traveling on a curved road, the turning in the yawing direction is reliably transmitted to the steering mechanism via the transmission shaft. 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. Furthermore, according to the present invention, it is possible to provide a steering bogie for a railway vehicle having a simple structure, a small number of parts, and a lightweight and low-cost 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 shaft.

FIG. 4 is an enlarged view of a steering mechanism and a transmission shaft 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 16 pin 20 gear mechanism 21 gear box 22, 23 bevel gear 24 driven shaft 25 plate 30 transmission shaft 31, 32 cross joint 33 ball spline 100 steering bogie for railway vehicle according to the present invention

Claims (4)

[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 connecting a box, and 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. One end is fixed to the vehicle body and the other is And a vertically extending transmission shaft connected to the support shaft, the transmission shaft absorbing rotation of the vehicle body in the rolling direction and the pitching direction with respect to the bogie frame, but rotating in the yawing direction. Motion can be transmitted A steering bogie for a railway vehicle, comprising: a flexible joint; and a slide joint capable of absorbing a change in a relative distance of the vehicle body to the bogie frame but transmitting rotation in a yawing direction. 2. A first joint in which the bending joint is connected to the vehicle body.
A second cross joint connected to the first cross joint and the support shaft, and the slide joint is a ball spline interposed between the first and second cross joints. 2. The steering bogie for a railway vehicle according to 1. 3. The steering bogie according to claim 1, wherein the bending joint and the slide joint are constant velocity joints. 4. The steering bogie for a railway vehicle according to claim 1, wherein the transmission shaft is connected to the support shaft via a gear mechanism.