JPH11124031A - Steering truck for railroad car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car axis from being steered even if the car body moves in the vertical or horizontal direction, and to allow the accurate steering when the car is running on a curved railway. SOLUTION: This variable gauge truck for a railroad car is provided with steering mechanisms 10L and 10R that steer the car axis using the circular movement of the car frame that is generated against the car body when the car is running on a curved railway, and a steering control mechanism 20 that controls these steering mechanisms 10L and 10R. Although the steering control mechanism 20 permits one of a pair of right and left steering levers 12L and 12R to move forward and the other backward, it prevents the pair of right and left steering levers 12L, 12R from both moving forward or both moving backward simultaneously. This prevents the steering mechanisms 10L and 10R from steering a pair of front and rear axles 5f and 5r even if the car moves in a vertical or horizontal direction when it is running on a straight railway.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes the rotation of a bogie frame generated with respect to a vehicle body when a railway vehicle travels on a curved road, so that the axis of the axle passes through the center of curvature of the curved road. More specifically, the present invention relates to a steering bogie for a railway vehicle having a steering mechanism for steering an axle, and more specifically, a stable straight running without steering even if the vehicle body is displaced vertically or horizontally relative to a bogie frame. The present invention relates to a railway vehicle steering bogie improved to enable traveling.

[0002]

2. Description of the Related Art Conventionally, by utilizing the rotation of a bogie frame generated with respect to a vehicle body 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. There have been proposed various types of railcar steering bogies that enable smooth and high-speed running on curved roads.

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.

Further, in order to accurately steer the axle so that the axis of the axle passes through the center of curvature of the curved road, the left and right ends of the axle are required to ensure that the longitudinal displacements of the left and right ends are equal. The left and right steering mechanisms for displacing the sections in the front-rear direction must be reliably linked. However,
JP-A-4-87873 and JP-A-4-8
In the steering bogie for railway vehicles described in Japanese Patent No. 7874, a left steering mechanism for displacing the left end side of the axle in the front-rear direction and a right steering mechanism for displacing the right end side of the axle in the front-rear direction correspond to the bogie frame. They are connected to each other via a link mechanism provided on the vehicle body side to absorb the relative displacement of the vehicle body. As a result, there is much backlash in the path connecting the left and right steering mechanisms to each other, and the left and right steering mechanisms cannot be linked accurately.

Therefore, the present invention provides a left and right steering system in which the steering mechanism does not steer the axle and the left and right ends of the axle are steered even when the vehicle body is displaced vertically and horizontally relative to the bogie frame. An object of the present invention is to provide a steering bogie for a railway vehicle provided with a steering mechanism capable of accurately steering an axle such that an axis of the axle passes through a center of curvature of a curved road by reliably linking the mechanisms.

[0008]

In order to solve the above-mentioned problems, a steering bogie for a railway vehicle according to the present invention utilizes the rotation of a bogie frame generated with respect to the vehicle body when the railway vehicle travels on a curved road. A steering mechanism that steers the axle so that an axis of the axle passes through the center of curvature of the curved road, and the steering mechanism is configured to be axle even when the vehicle body is displaced vertically and horizontally relative to the bogie frame. And a steering control mechanism for controlling the operation of the steering mechanism so as not to steer. The steering mechanism is pivotally supported by the bogie frame and is swingable in the front-rear direction, and has a pair of left and right steering levers respectively connected to the vehicle body via a pair of left and right connection links, and The pair of left and right steering levers and the pair of left and right connection links are connected via elastic connecting means capable of absorbing a relative displacement generated between the bogie frame and the bogie frame when the vehicle body is relatively displaced vertically and horizontally. Connected.
The steering control mechanism includes a pair of left and right control levers pivotally supported by the bogie frame, one end of each of which is connected to a swing end of the pair of left and right control levers, and the pair of left and right steering levers. A pair of left and right control rods each having the other end connected to the lever, and a swing end of the other control lever when the swing end of one of the left and right control levers swings forward. And a control link connecting the pair of left and right control levers so as to prevent the swing ends of both control levers from simultaneously swinging forward or backward simultaneously. Having.

That is, when the rail-to-rail variable bogie of the present invention travels on a curved road, the bogie frame rotates with respect to the vehicle body, so that one of the left and right connection links is steered to one of the right and left. Swing the lever forward,
The left or right connection link swings the left or right steering lever backward. At this time, the steering control mechanism allows any one of the pair of left and right steering levers to swing forward and the other swings backward, so that the steering control mechanism has no effect on the operation of the steering mechanism. It has no effect.

On the other hand, when the rail-to-rail variable bogie of the present invention travels on a straight road and the vehicle body is displaced up and down or left and right with respect to the bogie frame, a pair of left and right connecting links are formed. An attempt is made to displace both the left and right steering levers simultaneously in the forward direction or simultaneously in the backward direction. However, since the steering control mechanism does not allow the pair of left and right steering levers to simultaneously swing forward or backward simultaneously, the pair of left and right steering levers cannot swing at all. It does not work. The displacement of the connection link accompanying the displacement of the vehicle body is absorbed by elastic connection means interposed between the connection link and the steering lever.

Further, the left and right steering levers are connected to each other by a steering control mechanism mounted on the bogie frame. Then, the swing amount of the swing end of one of the left and right control levers in the forward direction is equal to the swing amount of the swing end of the left or right one of the control levers in the backward direction.
By disposing a pair of left and right control levers and a control link, the amount of forward swing of one of the left and right steering levers can be made equal to the amount of backward swing of one of the left and right steering levers. . Thus, the pair of left and right steering levers can be reliably linked to each other, and the pair of front and rear axles can be accurately steered so that the axis of the axle passes through the center of curvature of the curved road.

[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 one 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 railway vehicle of the present invention. FIG. 2 is a skeleton perspective view showing a structure of a steering cart for use. 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”, and the reference numeral of the member arranged on the rear side is “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 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 that rotatably support the wheels 4 are supported by a total of four axle boxes 6fL, 6fR, 6rL, 6rR arranged in front, rear, left and right. In addition, these shaft boxes 6f
A coil spring 7 as a shaft spring and a shock absorber 8 are interposed between L, 6fR, 6rL, 6rR and the spring receiving portion 3a of the bogie frame 3, respectively. Further, the wheels 4 are rotationally driven by a DDM (direct drive motor) type drive motor 9.

When the railway bogie 100 according to the present embodiment travels on a curved road, the pair of front and rear axles 5f and 5r are steered by a steering mechanism so that their axes pass through the center of curvature of the curved road. You. The steering mechanism includes a pair of front and rear axle boxes 6f supporting left end sides of the pair of front and rear axles 5f, 5r.
Left steering mechanism 10L for displacing L, 6rL in the front-rear direction
And a right steering mechanism 10R for displacing the pair of front and rear axle boxes 6fR, 6rR in the front-rear direction for supporting the right end sides of the pair of front and rear axles 5f, 5r. The left steering mechanism 10L will be described.

The left steering mechanism 10L is mounted on the left side surface of the bogie frame 3 and is supported by a horizontally extending swing shaft 11L so as to be swingable in the front-rear direction.
have. The support shaft 13L provided at the lower end of the steering lever 12L and the left front axle box 6fL are connected to the first
Are connected by a steering link 14L. Further, a support shaft 15L provided above the swing shaft 11L of the steering lever 12L and the left rear axle box 6rL are connected by a second steering link 16L.

Further, a bush 17L as an elastic connecting means is fixed to the upper end of the steering lever 12L.
The bush 17L has a structure in which a rubber annular bush is press-fitted between a metal outer ring and an inner ring, and the outer ring is fixed to the upper end of the steering lever 12L by welding. One end of a connection link 18L is pivotally supported on the inner ring. The other end of the connection link 18L is pivotally supported by the vehicle body anchor 1a.

As a result, when the railcar steering bogie 100 of the present embodiment travels on a curved road, the bogie frame 3 rotates with respect to the vehicle body 1, and the connection link 18 L changes in accordance with the rotational direction of the bogie frame 3. The upper end of the steering lever 12L is pushed and pulled to swing the steering lever 12L back and forth. When the upper end of the steering lever 12L is swung forward, the left front axle box 6fL and the left rear axle box 6rL are brought closer to each other. On the other hand, when the upper end of the steering lever 12L is swung rearward, the left front axle box 6fL and the left rear axle box 6rL are separated from each other.

On the other hand, a pair of left and right steering levers 12L and 12R of the left steering mechanism 10L and the right steering mechanism 10R are connected to each other by a steering control mechanism 20 provided on the bogie frame 3. The steering control mechanism 20 is disposed on the opposite side of the pair of left and right connection links 18L, 18R with respect to the pair of left and right steering levers 12L, 12R. The steering control mechanism 20 includes a pair of left and right support shafts 2 fixed to the bogie frame 3 and extending substantially vertically.
It has a pair of left and right control levers 22L and 22R that are swingably supported by 1L and 21R. The control levers 22L and 22R are formed in a substantially T-shape.
The bogie frame 3 is disposed symmetrically with respect to an axis extending in the front-rear direction, and its swing ends 22a, 22a extend leftward and rightward, respectively. In addition, these swing ends 22
One ends of a pair of left and right control rods 24L, 24R are swingably attached to the support shafts 23L, 23R provided on the a, 22a. The other ends of the control rods 24L and 24R are connected to a pair of left and right steering levers 12.
L and 12R are pivotally supported at the upper ends thereof via support shafts 19L and 19R.

Further, a pair of left and right control levers 22L, 2
A pair of left and right support shafts 25L, 25R provided at a swing end extending rearward of the 2R are connected by a first control link 26. Also, a pair of left and right control levers 22L, 22
A pair of left and right support shafts 2 provided at a swing end extending forward of R
7L and 27R are connected by a second control link 28. The first and second control links 26 and 28 form a parallel link.

Thus, the steering control mechanism 20 allows one of the pair of left and right control rods 24L, 24R to be displaced by the same dimension in the forward direction and the other in the rearward direction by the same amount, but the pair of left and right control rods 24L, 24R , 24R are prevented from simultaneously displacing forward or backward. Therefore, a pair of left and right control rods 24L, 24
A pair of left and right steering levers 12L and 12R connected to the steering control mechanism 20 via the R are allowed to swing by the same swing amount in the forward direction and the other in the backward direction by the same amount, but the pair of left and right steering levers is not limited. The swinging of the steering levers 12L and 12R simultaneously in the forward direction or simultaneously in the backward direction is prevented.

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

When the bogie frame 3 rotates with respect to the vehicle body 1 when the railcar steering bogie 100 of the present embodiment travels on a curved road, the pair of left and right connection links 18L and 18R causes the bogie frame 3 to rotate. According to the moving direction, a pair of left and right steering levers 12L,
One of the 12Rs is rocked forward, and the other is rocked rearward. At this time, the steering control mechanism 20 allows one of the pair of left and right steering levers 12L and 12R to swing forward and the other to swing backward. It has no effect on the operation of 10L and 10R.
Accordingly, the pair of left and right steering mechanisms 10L and 10R steer the pair of front and rear axles 5f and 5r such that the axes of the pair of front and rear axles 5f and 5r pass through the center of curvature of the curved road. The steering cart 100 can run smoothly and at high speed on a curved road.

The left and right steering levers 12L, 12L
The steering control mechanism 20 controls so that one of the forward swing amounts of R and the other of the backward swing amounts are equal. Further, the pair of left and right steering mechanisms 10L and 10R and the steering control mechanism 20 are both provided on the bogie frame 3, and the dimensional relationship between the two does not change. The pair of left and right steering mechanisms 10L and 10R and the steering control mechanism 20 are connected to each other so as not to cause backlash. Accordingly, the steering control mechanism 20 can accurately link the operations of the pair of left and right steering mechanisms 10L and 10R. Therefore, in the steering bogie 100 for a railway vehicle of the present embodiment, the left and right ends of the pair of front and rear axles 5f, 5r are displaced in the front-rear direction by reliably operating the pair of left and right steering control mechanisms 10L, 10R. Since the amount of displacement to be applied can be made equal, the pair of front and rear axles 5f and 5r can be accurately steered so that the axes of the pair of front and rear axles 5f and 5r surely pass through the center of curvature of the curved road.

On the other hand, the steering bogie 1 for a railway vehicle of the present embodiment
00, the vehicle body 1 is displaced vertically or horizontally relative to the bogie frame 3, and a pair of left and right steering levers 12L
The left and right 12R are simultaneously pulled forward or backward by a pair of left and right connection links 18L and 18R. However, since the steering control mechanism 20 does not allow the pair of left and right steering levers 12L and 12R to simultaneously swing forward or backward simultaneously as described above, the pair of left and right control levers 12L and 12R simultaneously move in the front and rear direction. Can not swing.

Thus, the relative displacement of the pair of left and right connection links 18L and 18R with respect to the pair of left and right steering levers 12L and 12R caused by the relative displacement of the vehicle body 1 in the vertical and horizontal directions with respect to the bogie frame 3 is equivalent to the pair of left and right steering. The levers 12L, 12R are absorbed by the bushes 17L, 17R interposed therebetween without swinging. Therefore, in the steering bogie 100 for a railway vehicle of the present embodiment, even if the vehicle body 1 is displaced vertically or horizontally relative to the bogie frame 3, the pair of front and rear axles 5
Since f and 5r are not steered by the steering mechanisms 10L and 10R, the vehicle can travel stably on a straight path.

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. . Further, a pair of left and right steering levers 12L and 12R and a pair of left and right connection links 18 are provided.
By making the spring characteristics of the bushes 17L and 17R connecting the L and 18R non-linear, the small displacement of the connection links 18L and 18R due to the vertical movement or the left and right movement of the vehicle body is not transmitted to the steering levers 12L and 12R. The large displacement of the connection links 18L and 18R due to the rotation of the frame is caused by the steering lever 1
It can also be transmitted to 2L and 12R. Further, as the elastic connecting means, a coil spring, a fluid pressure cylinder, or the like can be adopted instead of the bushings 17L, 17R.

[0027]

As is apparent from the above description, the steering bogie for a railway vehicle of the present invention controls the operation of the steering lever of the steering mechanism for steering the axle by using the steering control mechanism provided on the bogie frame. In addition, when the steering control mechanism restrains the steering lever so that the steering lever cannot be operated, the displacement of a connection link connecting the steering lever to the vehicle body is absorbed by elastic connection means.

Thus, when the railway bogie of the present invention travels on a curved road, the steering control mechanism has no effect on the steering mechanism. The axle can be steered to pass through the center of curvature of the road. Therefore, the rail-to-rail variable bogie of the present invention can smoothly and rapidly travel on curved roads.

In the steering bogie for a railway vehicle according to the present invention, the steering mechanism for steering the left end of the axle and the steering mechanism for steering the right end of the axle can be reliably linked via the steering control mechanism. it can. Therefore, the rail-to-rail variable bogie of the present invention can accurately steer the axle so that the axis of the axle passes through the center of curvature of the curved road, so that the traveling performance when traveling on a curved road is improved. It can be further improved.

Further, in the steering bogie for a railway vehicle according to the present invention, even if the vehicle body is displaced vertically and horizontally relative to the bogie frame, the operation of the steering mechanism is controlled by the steering control mechanism so that the axle is controlled. There is no steering. Therefore, the steering bogie for a railway vehicle of the present invention can run stably on a straight path. In addition, since the relative displacement of the vehicle body with respect to the steering mechanism due to the vertical movement and the horizontal movement of the vehicle body is absorbed by the elastic connecting means, the relative displacement of the vehicle body in the vertical direction and the horizontal direction is not hindered, and the conventional riding is performed. Comfort can be secured.

Further, in the steering bogie for a railway vehicle according to the present invention, since it is only necessary to provide an anchor on the vehicle body as in the conventional case, the structure on the vehicle body side can be simplified as in the conventional case.

[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 skeleton perspective view showing the structure of the steering bogie for a railway vehicle of the present invention.

[Explanation of symbols]

 R Rail 1 Body 2 Pillow spring 3 Bogie frame 4 Wheel 5 Axle 6 Axle box 7 Axle spring 8 Shock absorber 9 Drive motor 10 Steering mechanism 11 Oscillating shaft 12 Steering lever 13,15 Support shaft 14,16 Steering link 17 Bush 18 Connection Link 20 Steering control mechanism 21 Swing shaft 22 Control lever 23, 25, 27 Support shaft 24 Control rod 26, 28 Control link 100 Steering bogie for railway vehicle according to the present invention

Claims (3)

[Claims] 1. A steering mechanism for steering an axle such that an axis of an axle passes through a center of curvature of the curved road by utilizing rotation of a bogie frame generated with respect to a vehicle body when a railway vehicle travels on a curved road. And a steering control mechanism that controls the operation of the steering mechanism so that the steering mechanism does not steer the axle even if the vehicle body is displaced vertically and horizontally relative to the bogie frame. The mechanism is pivotally supported by the bogie frame, is swingable in the front-rear direction, has a pair of left and right steering levers respectively connected to the vehicle body via a pair of left and right connection links, and has a pair of left and right steering levers. The steering lever and the pair of left and right connection links are respectively connected via elastic connection means capable of absorbing a relative displacement generated between the bogie frame and the bogie frame when the vehicle body is relatively displaced in the up-down direction and the left-right direction with respect to the bogie frame. Connection The steering control mechanism includes a pair of left and right control levers pivotally supported by the bogie frame, one ends of the pair of left and right control levers are respectively connected to swing ends of the pair of left and right control levers, and A pair of left and right control rods each having the other end connected to the steering lever; and a swinging end of one of the left and right control levers when the swinging end of one of the control levers swings forward. A control link connecting the pair of left and right control levers so that the ends of the control levers are allowed to swing backward, but the swing ends of both control levers are simultaneously prevented from swinging forward or backward. And a steering bogie for a railway vehicle. 2. The control lever according to claim 1, wherein the pair of left and right control levers and the control link have a swing amount of a swing end of one control lever in a forward direction and a swing amount of a swing end of the other control lever in a backward direction. The steering bogie for a railway vehicle according to claim 1, wherein the steering bogies are arranged so as to be equal to each other. 3. The steering bogie according to claim 1, wherein the control link is a parallel link connecting the pair of left and right control levers.