JPH08324426A - Axle box supporting device for rolling stock - Google Patents

Abstract

PURPOSE: To provide an axle box supporting device for a rolling stock capable of giving the steerability to a conventional link arm type axle box supporting device without changing its basic constitution, and capable of reducing generation of the transverse pressure when the rolling stock passes a curved track. CONSTITUTION: In an axle box supporting device in which an axle spring is provided on an axle box, and the axle box is joined with the part close to the center of a truck frame by a link arm, the link arm is split into the axle box side and the truck frame side, the tips of the link arm members 6,7 on each side are connected to each other in a bendable manner in the vertical direction by a pin joint which is elastically supported in the longitudinal direction through an elastic body 8, and a hydraulic cylinder 10 which compresses a spring 11 normally by the hydraulic force and whose piston is located at the bottom dead center is installed between the pin joint and the truck frame. The spring 11 is elongated when the hydraulic pressure is reduced, and the axle distance is minimized when the piston is elevated at the top dead center, while the axle distance is maximized when it is descended at the bottom dead center.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle box support device for a railway vehicle, which is constructed so that when the railway vehicle travels on a curved road, the axle distance can be changed according to the curvature of the curved road.

[0002]

2. Description of the Related Art An axle box containing bearings for supporting both ends of an axle of a bogie for a railroad vehicle is provided to hold forward and backward movements, to allow a lateral pressure to be relaxed in the left and right directions, and to be cushioned in the up and down directions. It is supported by an axle box support device that is designed to actuate the action. There are various types of axle box support devices such as an axle box guard system, an axial beam system, a leaf spring system, a link arm system, and a rubber system.

FIG. 3 shows an example of a conventional link arm type axle box supporting device. A link arm 18 is connected by a pin joint between the mounting seat 12 of the bogie frame 1 and the mounting seat 13 of the axle box 5, and a shaft spring 9 is provided between the axle box 5 and the tip of the bogie frame.
It is composed of the arranged form.

In the pin joint of the link arm type shaft box supporting device, the cylindrical supporting portions 19 provided at both ends of the link arm 18 are fitted to the lids or the tips of the mounting seats 12 and 13, and are provided between the lids and the tips. It is configured to be supported via the support shaft 20 and the elastic body 8. Further, a rubber spring is used together with the coil spring for the normal shaft spring 9.

If the elastic rigidity of the elastic body 8 and the rubber spring in the front-rear direction is softened, the movement of the wheel in the yawing direction is allowed, and when the vehicle passes through a curved road, the steering characteristic of the wheel axle causes no wheel flange contact and lateral pressure is generated. Can be reduced. However, when passing through a straight road, it tends to cause snake behavior. Therefore, in reality, the design is focused on one of them, and it is not always possible to satisfy both the curved road passage property and the straight road passage property.

FIG. 4 shows a state in which the bogie frame 1 of a railway vehicle passes through a curved road. Since the wheel set is fixed to the bogie, an angle θ is formed between the traveling direction of the wheels and the rail direction. As a result, lateral pressure is generated on the outer-rail side wheels of the front wheel shaft. In order to reduce this lateral pressure, the axial distance between the inner gauge side and the outer gauge side is changed when passing through a curved road, and the axial distance difference (L-L ₀ ) is adjusted so that the rolling direction of the wheels is aligned with the rail direction. Need to give.

As described above, when passing through a curved road, if the rolling direction of the wheels and the direction of the rail are always the same, it is necessary to compensate for the difference between the inner and outer rail passage distances due to the difference in diameter of the inner and outer wheels due to the tread slope. Therefore, a smooth curved road can be passed. Therefore, wear of the wheel flanges and rails is prevented, and stable running at high speed is possible, so researches on self-steering bogies have been advanced in recent years.

In the self-steering bogie, for example, a method of transmitting an angle formed between the car body and the bogie, which occurs when the car enters a curved road, to a steering angle between the bogie and wheels (Japanese Patent Laid-Open No. 6-874).
No. 46) and a steering cart having a movement control device for moving the axle box back and forth and left and right with respect to the bogie frame (Japanese Patent Laid-Open No. 1-1324).
No. 63) is proposed.

[0009]

According to the above-mentioned self-steering carriage, when passing through a curved road, the direction in which the wheels roll and the direction in which the rails are aligned to prevent lateral pressure from occurring and stabilize at high speed. Although traveling is ensured, in both cases, since the axle box is provided so as to be movable in the front-rear direction and the left-right direction, it is inevitable that the mechanism is complicated.

The present invention avoids the fact that the conventional self-steering carriage is mechanically complicated, and imparts steerability to the conventional link-arm type axle box supporting device without changing the basic structure of the conventional link-arm type axle box supporting device. Provided is a rail car axle box support device capable of reducing the occurrence of lateral pressure.

[0011]

In order to achieve the above object, the present invention comprises the following inventions. (1) In a shaft box supporting device in which a shaft spring is provided on the shaft box and a link arm joins between the shaft box and the center of the bogie frame, the link arm is divided into two parts, a shaft box side and a bogie frame side. Then
The tip ends of the link arm members on both sides are flexibly connected in the vertical direction by a pin joint elastically supported in the front-rear direction via an elastic body, and a spring is compressed between the pin joint and the bogie frame by normal hydraulic pressure. Install a hydraulic cylinder where the piston is located at bottom dead center, so that the axial distance is minimum when the spring extends due to decompression and the piston is located at top dead center, and the maximum axial distance when it descends to bottom dead center. To configure.

(2) In a railway vehicle having a vehicle body inclination control device under program control, a shaft box support device in which a shaft spring is provided on a shaft box, and a link arm joins between the shaft box and the center of the bogie frame. In, the link arm is divided into a shaft box side and a bogie frame side, and the tip ends of both side link arm members are flexibly connected in the vertical direction by a pin joint elastically supported in the front-rear direction via an elastic body, Between the pin joint and the bogie frame, a spring is compressed by normal hydraulic pressure so that the piston is located at the bottom dead center and a hydraulic cylinder operated by a control signal from the controller is installed. When the piston is located at the top dead center, the axial distance is minimum, and when it descends to the bottom dead center, the axial distance is maximum, and the hydraulic cylinder is driven according to the curvature of the curved road when passing through the curved road. , The wheel axle in the radial direction You can steer.

[0013]

[Operation] The link arm is divided into two parts, the shaft box side and the bogie frame side, and the tip end of the link arm is flexibly connected in the vertical direction by a pin joint elastically supported in the front-rear direction via an elastic body. A hydraulic cylinder, in which the spring is compressed by normal hydraulic pressure and the piston is located at the bottom dead center, is installed between the bogie frame and the piston. Since the axial distance is maximized when the pin joint is lowered to the bottom dead center, the axial distance between the inner gauge side and the outer gauge side (L- L ₀ ) can be generated.

Therefore, by adjusting the drive of the hydraulic cylinder according to the curvature of the curved road, the difference in the axial distance (L-
L ₀ ) can be changed, and the rolling direction of the wheels can be matched with the rails to reduce the generation of lateral pressure. As a result, speeding up and safe driving when passing a curved road are improved.

For the operation of the hydraulic cylinder, for example, a lateral acceleration sensor (not shown) is provided on the vehicle body, or a bogie angle detection sensor (not shown) is provided between the vehicle body and the bogie.
Can be provided, and detection can be performed using these detection signals.

Further, in a railway vehicle having a vehicle body tilting device under program control, by using curved road information which is inputted in advance to a controller, and electrically operated by a preview signal before entering a curved road. Therefore, it is possible to quickly change the axial distance more accurately without causing an operation delay.

[0017]

【Example】

Embodiment 1 An embodiment corresponding to the invention described in claim 1 is shown in FIG.
A description will be given based on (B). A shaft spring 9 made up of a combination of a coil spring and a tubular elastic body is provided between a shaft box 5 accommodating bearings 4 supporting both ends of the axle of the wheel shaft 3 and the tip of the bogie frame 1. The link arm is attached to the mounting seat 12 projecting near the center of the bogie frame 1 and the mounting seat 13 formed on the axle box 5 while allowing the link arm members 6 and 7 to move vertically and horizontally. The tip ends of the two are joined by a pin joint composed of the support shaft 17 and the elastic body 8 so as to be bendable in the vertical direction. In the pin joint, the cylindrical support portion 6 _a formed at the tip of the link arm member 6 is fitted between the lid or the tip formed at the link arm member 7, the support shaft 17 is penetrated, and the elastic body 8 is provided around it. Both ends of the support shaft 17 are fastened with bolts 16.

Then, the cylindrical support portion 6 having a pin joint is formed.
_Between the upper surface of a and the lower surface of the bogie frame 1, the hydraulic cylinder 10
To provide. There is a spring 11 between the upper surface of Pisutonto and the cylindrical support portion 6 _a of the hydraulic cylinder 10, the link arm wheelbase minimum bent upward when Pisutonto spring 11 is extended is at the top dead center Thus, when the spring 11 is compressed and the piston is at the bottom dead center, the link arm is extended straight and the axial distance is maximized. It should be noted that the oil chamber 10 _a and the oil reservoir 14 formed in the upper portion of the hydraulic cylinder 10
An electromagnetic switching valve 15 is provided in the middle of the oil pipe that connects with. The electromagnetic switching valve 15 responds to the curvature of the curved road by a detection signal from a lateral acceleration sensor (not shown) provided on the vehicle body or a bogie angle detection sensor (not shown) provided between the vehicle body and the bogie. And is provided so as to operate the hydraulic cylinder 10. By switching the electromagnetic switching valve 15, when the pressure oil in the oil chamber 10 _a flows out to the oil sump 14, the piston moves upward and the link arm bends upward.

Embodiment 2 An embodiment corresponding to the invention described in claim 2 is shown in FIG.
A description will be given based on (B) and FIG. The structure of the link arm type axle box supporting device of the present invention is the same as that shown in FIGS. 1A and 1B described in the first embodiment, and the operation of the electromagnetic switching valve 15 of the hydraulic cylinder 10 is changed. The difference is that the preview signal is used depending on the curved road information from the controller of the vehicle body tilt control device.

The vehicle body inclination control device for operating the electromagnetic switching valve 15 is not mechanically limited. An example of this is shown in FIG. The vehicle body tilt control device of FIG. 2 has a detection signal from a pressure sensor 22 installed on left and right air springs 21 provided between the bogie frame 1 and the vehicle body 2, and a detection signal from left and right air spring height sensors 26. A signal is input to the controller 27, and an air supply valve 24 and an exhaust valve 25 are provided in the middle of a pipe connecting the left and right air springs 21 and the air reservoir 23,
In response to a control signal from the controller 27, air is supplied to and exhausted from the air spring 21 to control the leaning of the vehicle body.

The controller 27 of the vehicle body inclination control device includes
Curve information of the running route is input in advance. For example, by detecting the position by the ground element installed on the entrance side and the exit side of the curved road, accurate curve information can be output without time delay. It is configured. In the present invention,
Based on the curve information when the vehicle body is tilted by the program control, a control signal obtained by a comparison calculation based on the relationship between the curvature of the curved road and the axial distance, which is input to the controller 27 in advance, is sent to the electromagnetic switching valve 15. Output and operate the hydraulic cylinder 10.

[0022]

According to the present invention, the link arm of the link arm type shaft box supporting device is divided into two parts, which are flexibly connected by the pin joint, and the bending operation is performed by the hydraulic cylinder. It is possible to give steering characteristics to the wheel axles, and to improve speed and safety when passing through a curve.

[Brief description of drawings]

1A and 1B are explanatory views showing an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a plan view taken along line CC in FIG.

FIG. 2 is an explanatory diagram showing an example of a vehicle body inclination control device in a railway vehicle.

FIG. 3 is a front view showing an example of a normal link arm type axle box supporting device.

FIG. 4 is an explanatory diagram showing the orientation of the wheel sets with respect to the track when the railway vehicle passes through a curved road.

[Explanation of symbols]

1 bogie frame 2 vehicle body 3 wheel axle 4 bearing 5 axle box 6, 7 link arm member 6 _a cylindrical support portion 8 elastic body 9 axial spring 10 hydraulic cylinder 10 _a oil chamber 11 spring 12, 13 mounting seat 14 oil sump 15 electromagnetic switching valve 16 bolt 17 support shaft 18 link arm 19 cylindrical support 20 support shaft 21 air spring 22 pressure sensor 23 air reservoir 24 air supply valve 25 exhaust valve 26 height sensor 27 controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigeo Sugawara 5-10 109 Shimaya, Konohana-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd. Kansai Works Steelmaking Office

Claims (2)

[Claims] 1. A shaft box supporting device in which a shaft spring is provided on a shaft box, and the shaft box and the center of the bogie frame are joined by a link arm, wherein the link arms are provided on the shaft box side and the bogie frame side. It is divided into two parts, and the ends of the link arm members on both sides are flexibly connected in the vertical direction by a pin joint elastically supported in the front-rear direction via an elastic body, and a spring is normally provided between the pin joint and the bogie frame by hydraulic pressure. Install a hydraulic cylinder whose piston is located at the bottom dead center, and when the spring expands due to pressure reduction and the piston is located at the top dead center, the axial distance is the minimum, and when it descends to the bottom dead center, the axial distance is the maximum. An axle box support device for a railway vehicle, characterized in that it can be steered on a curved road. 2. A railroad vehicle having a vehicle body inclination control device under program control, comprising an axle spring on an axle box,
In a shaft box supporting device in which a shaft box and a portion near a center of a bogie frame are joined by a link arm, the link arm is divided into two parts, a shaft box side and a bogie frame side, and ends of both side link arm members are provided with an elastic body. It is flexibly connected in the vertical direction with a pin joint elastically supported in the front-back direction, and between the pin joint and the bogie frame,
Install a hydraulic cylinder that compresses the spring with normal hydraulic pressure and the piston is located at the bottom dead center, and is operated by a control signal from the controller.When the spring expands due to decompression and the piston is located at the top dead center, the axial distance is increased. Is configured so that the axle distance becomes maximum when descending to the bottom dead center, and the hydraulic cylinder is driven according to the curvature of the curved road when passing through the curved road to steer the wheel axle in the radial direction. Axle box support device for railway vehicles.