JP2001001897A - Single-axle independent wheel bogie for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure a safe traveling by controlling the turning of a bogie so that an attack angle formed with a wheel and a rail does not exceed a safety angle. SOLUTION: A pair of wheels 3 and 3 drivingly rotated independently by main electric motors 8 and 8, respectively, are installed on a bogie frame 2 of a single-axle independent wheel bogie 1. The speeds of the main electric motors 8 and 8 are controlled to be identical to each other. A damper mechanism 10 controlling the turning of the bogie 1 is installed between a body 5 and the bogie frame 2, and a centering mechanism 20 returning the bogie 1 to neutral position is installed between the body 5 and the bogie frame 2. A stopper 100 is installed on the bottom surface of the bogie frame 2. When the bogie 1 turns and an attack angle just exceeds a safe angle, the stopper 100 is brought into contact with the side face of a rail to control so that the bogie 1 does not turn in the direction that a turning angle is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-axle independent wheel bogie for a railway vehicle. According to the present invention, the uniaxial independent wheel bogie for a railway vehicle turns (yaws) in a horizontal plane with respect to the vehicle body so that an attack angle formed by the wheels and the rail does not exceed a predetermined safety angle. The safety is enhanced by devising mechanically the turning of the single-axle independent wheel bogie. The attack angle is an angle formed by the traveling direction of the wheel and the extending direction of the rail when observed in a horizontal plane.

[0002]

2. Description of the Related Art Many power bogies for railway vehicles at present employ integrated wheels in which a right wheel and a left wheel are connected to each other by an axle. The vehicle is decelerated by the reduction gear and transmitted to the integrated wheels to travel. When traveling on a curved track, curved traveling is possible by a self-steering effect using the gradient of the tread surface of the wheel.

[0003] On the other hand, recently, an independent wheel powered bogie has been developed to adopt a low floor structure or the like. In this independent wheel powered bogie, the axle is omitted to rotate right and left wheels individually and independently, and each wheel is driven by an individual electric motor.

[0004] Among such independent wheel powered trucks, there is a truck called a "one-axis independent wheel truck". In this single-axle independent wheel bogie, a pair of wheels (two wheels) is arranged for one bogie frame, and the right and left wheels rotate individually and independently, and each wheel is rotated. It is driven by individual motors. Although the right wheel and the left wheel rotate independently without being connected by an axle, they form a pair and constitute one axis, and are therefore referred to as "one-axis" independent wheel bogies.

In such a single-axle independent wheel truck, when traveling on a straight track, the motor speed is controlled so that the left and right wheel speeds are the same. By doing so, the turning angle (yawing angle) of the bogie with respect to the vehicle body becomes zero,
It can run on a straight track.

When traveling on a curved track, the following 2
It is considered that the vehicle travels on a curved track by two methods. (I) The motor speed is controlled so that the left and right wheel speeds are the same, and the vehicle travels on a curve using the self-steering effect as in the case of the integrated wheel. (ii) The motor speed is controlled so that the wheel speed of the wheels on the outer track is higher than the wheel speed of the wheels on the inner track.
In this manner, the bogie turns at an angle with respect to the vehicle body, and can travel on a curved track.

[0007]

In the single-axle independent wheel truck, one of the left and right wheels is slipped or gripped, or an electric motor for driving the right wheel and a left wheel are driven. If the accuracy of the speed control of the electric motor shifts, the bogie turns with respect to the vehicle body, and the attack angle may exceed the safe angle.

[0008] If the attack angle is within the safe angle, the vehicle can be driven safely without derailing (a situation in which the flange of the wheel goes over the rail). The angle at which the vehicle can travel safely is defined as "safety angle".

In a two-axle bogie (a bogie having two axles with two wheels arranged on the right side and two wheels on the left side with respect to one bogie frame), even if the attack angle becomes large to some extent, There is almost no possibility of derailing due to the shaft structure, but with a single-axle independent wheel bogie, there is a single axis, so if the attack angle becomes large to some extent, there is a possibility of a large accident of derailing However, it is higher than a two-axle truck.

In particular, in the case where the vehicle travels on a curve by the method (ii), the precision of the motor speed control must be extremely high in order to carry out the curve traveling safely. However, as a result of a study by the inventor of the present application, it has been found that it is practically difficult to increase the motor speed control to such an extent as to ensure safe driving.

Therefore, the inventor of the present application adopts the technique of performing a curve running by the method (i) described above to perform the curve running, and devises to improve the running safety of the single-axle independent wheel truck in this case. I decided that. In other words, the turning of the bogie is restricted by the stopper so that the attack angle does not exceed the safe angle, so that the vehicle can be driven safely.

An object of the present invention is to provide a single-axle independent wheel bogie for a railway vehicle, which has improved stable running performance in view of the above prior art and the results of the technical studies.

[0013]

According to the structure of the present invention for solving the above-mentioned problems, a pair of wheels is arranged for one bogie frame, and the right and left wheels are individually and independently provided. In a single-axle independent wheel bogie for railway vehicles that can rotate and drive each wheel with an individual electric motor, the uniaxial independent wheel bogie turns with respect to the vehicle body, and the attack angle formed by the wheels and the rail is predetermined. A stopper is provided on the bogie frame to restrict the turning of the uniaxial independent wheel bogie in a direction in which the turning angle increases by coming into contact with the side surface of the rail when exceeding the safety angle.

In the configuration of the present invention, the stopper is
The stopper has a curved contact surface that slides on the side surface of the rail, and the stopper has a roller that rolls on the side surface of the rail.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view showing a single-axle independent wheel bogie for a railway vehicle according to an embodiment of the present invention. FIG. 2 shows a single-shaft independent wheel bogie according to the present embodiment, in which a stopper contacts a rail. It is a front view shown in a state.

As shown in FIGS. 1 and 2, on the right and left sides of a bogie frame 2 of a single-axle independent wheel bogie 1 for a railway vehicle, left and right wheels 3, 3 which rotate individually and independently are arranged. I have. That is, a pair of wheels 3 is arranged on one bogie frame 2. A vehicle body 5 is mounted on the single-axle independent wheel truck 1 via suspension springs 4 and 4. And
The single-axle independent wheel truck 1 is moved by a moving
A turning operation (a yawing operation) can be performed on the vehicle body 5 in a horizontal plane.

The right and left sides of the bogie frame 2 are provided with speed reducers 6, 6, respectively. The reduction gear units 6, 6 are orthogonal reduction gears such as bevel gears, and wheels 3, 3 are connected to the output shaft.

A control device 7 and a main motor 8,
8 are provided. The main motors 8, 8 are provided with tachometers 8a, 8a for detecting the motor rotation speed. The motor speed detected by the tachometers 8a, 8a is
It is fed back to the control device 7, and the control device 7 controls the two main motors 8, 8 so that the rotation speeds thereof are equal.
The motor speed control is performed.

The propulsion shafts 9, 9 arranged on the left and right connect the main motors 8, 8 to the reduction gear sections 6, 6, and transmit the rotational force of the main motors 8, 8 to the reduction gear sections 6, 6. I do. A spline is formed in each of the propulsion shafts 9, 9 in the axial direction, and the propulsion shafts 9, 9 have a structure capable of extending and contracting in the axial direction.

In the drive system as described above, the main motors 8 and 8 are driven to rotate at a constant speed by the control device 7, and the rotational force is transmitted to the wheels 3 and 3 , And the wheels 3 and 3 rotate to run on the rail R.

A damper mechanism 10 is provided on the right side of the single-axle independent wheel truck 1. This damper mechanism 10
It is composed of an L-shaped lever 11, a damper 12, and a pair of side rods 13a, 13b at the top and bottom.

The lever 11 has a central portion rotatably attached to a right side portion of the vehicle body 5. Damper 12
Is connected between the vehicle body 5 and the one side 11a in a state where the vehicle body 5 is connected to the one side 11a of the lever 11.
The upper and lower side rods 13a and 13b are arranged so as to extend in the traveling direction of the single-axle independent wheel bogie 1 and connect the bogie frame 2 and the other side 11b of the lever 11 with the bogie frame 2 and the other side 11b. It is interposed between and.

Since the damper mechanism 10 is provided, the vehicle body 5
In contrast, when the single-axle independent wheel bogie 1 attempts to make a turning operation (yaw operation), a regulating force for restricting the turning operation is applied to the single-shaft independent wheel bogie 1 and the turning operation becomes difficult.

The side rod 13 of the damper mechanism 10
Since the a and 13b are vertically arranged so as to extend in the traveling direction of the single-axle independent wheel bogie 1, it is possible to prevent the single-shaft independent wheel bogie 1 from turning over in the pitching direction with respect to the vehicle body 5. .

A decentering mechanism 20 is installed on the left side of the single-axle independent wheel truck 1. The decentering mechanism 20 includes an L-shaped lever 21, a decentering device 22, and a pair of upper and lower side rods 23a and 23b.

The center of the lever 21 is rotatably attached to the left side of the vehicle body 5. Decentering device 22
Is interposed between the vehicle body 5 and the one side 21a in a state where the vehicle body 5 is connected to the one side 21a of the lever 21.
The upper and lower side rods 23a and 23b are arranged so as to extend in the traveling direction of the single-axle independent wheel bogie 1 and connect the bogie frame 2 and the other side 21b of the lever 21 with the bogie frame 2 and the other side 21b. It is interposed between and.

With such a decentering mechanism 20, when the single-axle independent wheel bogie 1 makes a turning operation (yaw operation) with respect to the vehicle body 5, the turning angle (yaw angle) of the single-axis independent wheel bogie 1 with respect to the vehicle body 5 becomes zero. Towards the direction
A turning force can be applied to the single-axle independent wheel truck 1.
That is, to return the single-axle independent wheel truck 1 to the neutral position,
A turning force can be applied.

The side rod 23 of the decentering mechanism 20
Since the a and 23b are vertically arranged so as to extend in the traveling direction of the single-axle independent wheel truck 1, it is possible to prevent the single-shaft independent wheel truck 1 from tipping and turning with respect to the vehicle body 5 in the pitching direction. .

The connecting rod 30 has a lever 21 on its left side.
Of the lever 11 is connected to one side 11a of the lever 11.

The connecting rod 30 and the levers 11, 21
And a link mechanism including the side rods 13a, 13b, 23a, and 23b constitute a movable hearth plate mechanism. For this reason, the single-axle independent wheel bogie 1 can turn (yawing operation) in the horizontal plane with respect to the vehicle body 5 by the movable hearth plate mechanism.

In the embodiment having the above-described configuration, even when the vehicle travels at a high speed, the single-axle independent wheel bogie 1 does not cause snake action (bogie yawing vibration). This is because the turning of the single-axle independent wheel truck 1 is restricted by the damper mechanism 10 and the single-axle independent wheel truck 1 is returned to the neutral position by the decentering mechanism 20.

The control device 7 controls the main motors 8, 8
Since the motor speed is controlled so that the motor speeds of the left and right wheels are the same, the wheel speeds of the left and right wheels 3 become the same,
In a curved track, the vehicle can travel in a curved manner by the self-steering effect using the gradient of the treads of the wheels 3.

When traveling along a small curve, for example, when traveling on a very steep small curve of R25m which exists only at several points on the business route, the motor speeds of the left and right main motors 8 are set to be the same. Even if the motor speed is controlled, the resistance of the wheels on the inner track (motor load) becomes larger than the resistance of the outer wheels (motor load), so that the rotation speed of the wheels on the inner track is smaller than the rotation speed of the outer wheels. It can also run on small curves.

Further, in the present embodiment, the stopper 100 is provided with the stopper mounting bolt 101 at four places on the bottom surface of the bogie frame 2.
It is attached by. Each stopper 100 is shown in FIG.
As shown in FIG. 2, the contact surface 102 has a curved contact surface 102 formed to contact the side surface of the rail R.

When the single-axle independent wheel bogie 1 turns with respect to the vehicle body 5 due to slipping or gripping of the wheels 3 and 3 and the attack angle exceeds a predetermined safety angle, a stopper is provided. The contact surface 102 of 100 contacts (slids) the side surface of the rail R. In FIG. 3, the right stopper 100 is in contact with the side surface of the rail R. When the contact surface 102 comes into contact with the side surface of the rail R in this manner, the turning of the uniaxial independent wheel truck 1 in a direction in which the turning angle increases is restricted. Therefore, the single-axle independent wheel bogie 1 does not turn with the attack angle exceeding the safe angle, and can travel safely.

The stopper is not limited to the one shown in FIG. 3, but may be a stopper 110 shown in FIG. 4 or a stopper 120 shown in FIG.

In a stopper 110 shown in FIG. 4, a roller 112 that rotates in a horizontal plane is rotatably attached to a bracket 111. When the uniaxial independent wheel truck 1 turns with respect to the vehicle body 5 and the attack angle exceeds the predetermined safety angle, the roller 112 of the stopper 110 rolls (rotates) on the side surface of the rail R. Because of such rotational contact, the stopper 110 and the rail R
And the contact resistance between them becomes smaller. Of course, this stopper 11
0 also restricts the turning of the single-axle independent wheel bogie 1 in the direction in which the attack angle increases, and the single-shaft independent wheel bogie 1
Does not turn beyond the safe angle, and can travel safely.

In a stopper 120 shown in FIG. 5, a wheel-type roller 122 that rotates in a vertical plane is rotatably attached to a bracket 121. When the uniaxial independent wheel truck 1 turns with respect to the vehicle body 5 and the attack angle exceeds a predetermined safety angle, the stopper 12
0 roller 122 rolls on the side surface of rail R (rotational contact)
I do. Due to such rotational contact, the contact resistance between the stopper 120 and the rail R is reduced. Of course, the stopper 120 also restricts the turning of the single-axle independent wheel bogie 1 in the direction in which the attack angle increases, so that the single-shaft independent wheel bogie 1 does not turn beyond the safe angle.
You can drive safely.

[0040]

As described above in detail with the embodiments, in the present invention, a pair of wheels is arranged for one bogie frame, and the right wheel and the left wheel are individually arranged.
In a single-axle independent wheel bogie for railway vehicles that can rotate independently and drive each wheel with a separate electric motor, the uniaxial independent wheel bogie turns with respect to the vehicle body, and the attack angle formed by the wheels and the rails is A stopper is provided on the bogie frame to restrict the turning of the single-axle independent wheel bogie in a direction in which the turning angle is increased by contacting the side surface of the rail when trying to exceed a predetermined safety angle. .

With this configuration, when a single-axle independent wheel bogie turns with respect to the vehicle body due to slipping or gripping of the wheels, and the attack angle attempts to exceed a predetermined safety angle, a stopper is provided. Contact surface of the rail contacts the side surface of the rail. When the contact surface contacts the side surface of the rail as described above, the turning of the single-axle independent wheel bogie 1 in a direction in which the attack angle increases is restricted. For this reason, the single-axle independent wheel truck does not turn beyond the safe angle, and can travel safely.

In the present invention, the stopper has a curved contact surface that slides on the side surface of the rail, or the stopper has a roller that rolls on the side surface of the rail.

With this configuration, the contact resistance of the stopper to the rail is reduced, and safe driving can be more reliably realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing a single-axle independent wheel bogie for a railway vehicle according to an embodiment of the present invention.

FIG. 2 is a front view showing a single-axle independent wheel bogie for a railway vehicle according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a stopper used in the single-axle independent wheel bogie for a railway vehicle according to the embodiment of the present invention.

FIG. 4 is a perspective view showing another example of a stopper.

FIG. 5 is a perspective view showing still another example of the stopper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Single axis independent wheel truck 2 Truck frame 3 Wheel 4 Suspension spring 5 Body 6 Reduction gear unit 7 Control device 8 Main motor 8a Tachometer 9 Propulsion shaft 10 Damper mechanism 11 Lever 11a One side 11b The other side 12 Damper 13a, 13b Side rod 20 Decentering mechanism 21 Lever 21a One side 21b The other side 22 Decentering device 23a, 23b Side rod 30 Connecting rod 100, 110, 120 Stopper 101 Stopper mounting bolt 102 Contact surface 111, 121 Bracket 112, 122 Roller

Claims (3)

[Claims] 1. A railway vehicle in which a pair of wheels is arranged for one bogie frame, and a right wheel and a left wheel can rotate individually and independently, and each wheel is driven by a separate electric motor. A single-axle independent wheel truck for a vehicle, the single-wheel independent wheel truck turns with respect to the vehicle body, and contacts the side surface of the rail when the attack angle formed by the wheel and the rail attempts to exceed a predetermined safety angle. A single-shaft independent wheel bogie for a railway vehicle, wherein a stopper for restricting the turning of the single-shaft independent wheel bogie in a direction in which the turning angle increases is provided on the bogie frame. 2. The single-axle independent wheel bogie for a railway vehicle according to claim 1, wherein the stopper has a curved contact surface that slides on a side surface of the rail. 3. The single-wheel independent wheel bogie for a railway vehicle according to claim 1, wherein the stopper has a roller that rolls on a side surface of the rail.