JP5943739B2 - Railcar bogie - Google Patents

Description

  The present invention relates to a carriage for a railway vehicle in which a drive device having a rotating body such as a drive motor is incorporated as a gyro damper.

  As disclosed in Patent Document 1, as a gyro mechanism conventionally applied to a railway vehicle carriage, an angle using the property that the direction of the rotating shaft is always constant regardless of the direction of the carriage as long as no external force is applied. It is used as a sensor.

On the other hand, Patent Document 2 and Patent Document 3 propose that the gyro effect (the property that the rotating shaft moves in a direction perpendicular to the applied external force in the direction perpendicular to the applied force) is not applied to the angle sensor, but is used to stabilize the running of the vehicle. It is disclosed.

In Patent Document 2, a gyro mechanism is disposed on the floor of a vehicle to suppress pitching and rolling of a traveling work vehicle used at a construction site and the like, and a gyro moment that counterbalances the external force moment is generated passively. It is a thing. Patent Document 3 proposes a gyro mechanism disposed on the loading platform of a bicycle to improve running stability.

On the other hand, in order to provide a steering function at the time of curved traveling in a railway vehicle, a tread surface gradient is provided on the wheel so that the traveling distance of the outer wheel at the time of curved traveling is longer than the traveling distance of the inner wheel. However, this tread surface gradient causes the left and right wheels to have different traveling distances during straight running, causing slippage on one wheel and causing meandering.
In view of this, the present inventors have made a proposal as a damper in Non-Patent Document 1 by applying the above gyro mechanism to a railway vehicle and suppressing a snake behavior during straight running.

JP-A-9-233613 JP-A-8-297027 JP 2011-088594 A

Proceedings of the First International Conference on Railway Technology, Reserch, Developmant and Maintenance, Civil-Comp Press, 2012

  As disclosed in Non-Patent Document 1, by providing a rail car with a gyro mechanism, it is possible to suppress snake behavior during straight running. However, it is necessary to provide a separate gyro mechanism on the carriage, which is disadvantageous in terms of weight increase, and further requires individual control for rotating the rotating body of the gyro.

  In order to solve the above-described problems, a railway vehicle bogie according to the present invention has an axle with wheels fixed between bearings attached to a frame so as to be rotatable, and this axle is connected to a drive motor or the like via a reduction gear train. It is a railway vehicle carriage that is rotated by a drive device having a rotating body, and the frame functions as an outer gimbal that can rotate around a vertical axis that passes through an intermediate position of the axle, and is located inside the outer gimbal. An inner gimbal having a horizontal axis orthogonal to the vertical axis is provided, and the driving device is supported on the horizontal axis of the inner gimbal so as to be swingable in a vertical plane so as to function as a gyro damper. A rotating body that exhibits a gyro effect and a driving gear are attached to the shaft, and at least one of the driving gear and the driven gear that constitutes the reduction gear train that meshes with the driving gear is at the front. And to have a shape that follows the rocking of the apparatus having a rotary body configuration.

  In the above, it is preferable that the drive shaft of the device provided with the rotating body is perpendicular to the horizontal axis of the inner gimbal and parallel to the axle in a neutral position, that is, in a state where no external force is applied.

In addition, since at least one of the drive gear of the device including the rotating body or the driven gear constituting the reduction gear train meshing with the drive gear is a spherical gear, power is reliably transmitted even if the drive motor swings. can do.
In addition to the spherical gear, other mechanisms that can transmit rotational power while allowing swinging, such as those using non-backlash gears and universal joints, are conceivable.

  According to the present invention, since the drive motor itself forms part of the gyro mechanism, it is not necessary to add a special member. Therefore, the weight of the cart is not increased. Further, since the drive motor functions as a conventional vehicle drive motor, it is not necessary to perform individual control. Further, a gyro mechanism can be configured as long as a drive device other than the drive motor includes a rotating body.

Schematic diagram of gyro mechanism Front view explaining the outline of the carriage equipped with the gyro mechanism Side view explaining the outline of the carriage equipped with the gyro mechanism Front view of a cart according to the present invention Side view of a cart according to the present invention The perspective view which shows another Example of a drive gear (A) And (b) is the front view explaining the effect | action of the trolley | bogie which concerns on this invention. The graph which compared the start speed of the snake action of this invention and a prior art example

Examples of the present invention will be described below.
First, the gyro mechanism will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes an outer gimbal, and the outer gimbal 1 is rotatable about a vertical axis Y. An inner gimbal 2 is provided in the outer gimbal 1. The inner gimbal 2 is supported by the outer gimbal 1 so as to be swingable about a horizontal axis X.

A rotating body 4 is attached to the inner gimbal 2 via a support shaft 3 orthogonal to the horizontal axis X and the vertical axis Y. A spring 5 is disposed between the inner gimbal 2 and the outer gimbal 1 for returning the neutral position, that is, the inner gimbal 2 (support shaft 3) to a horizontal state. A pendulum may be used in addition to the spring 5.

When an external force acts on the above-described gimbal mechanism, for example, an external force that rotates the outer gimbal 1 in the direction a, a gyro moment in the direction b that balances with this force is generated in the opposite direction, and the carriage is stabilized.

Next, a state in which the above gyro mechanism is applied to a railway vehicle carriage will be described with reference to FIGS. 2 and 3 are not the railcar bogie according to the present invention but the basis thereof.

In the railway vehicle bogie, an axle 11 is rotatably supported on a frame (bogie frame) 10, and wheels 12 are attached to the axle 11. A contact surface gradient is formed on the contact surface of the wheel 12 with the rail 13.

A gyro mechanism is provided on the frame 10. In this gyro mechanism, an outer gimbal 1 is supported on a frame 10 via a vertical axis Y, an inner gimbal 2 is provided in the outer gimbal 1 via a support piece, and the inner gimbal 2 is centered on a horizontal axis X. The rotary body 4 is supported by the inner gimbal 2 via a support shaft 3, and a weight 14 is suspended at one end protruding from the outer gimbal 1 of the horizontal axis X. In the state where no external force is applied, the support shaft 3 and the axle 11 are parallel to each other, and the weight 14 hangs down directly below.

In the above, an external force is applied by the vibration accompanying the running of the vehicle, and the outer gimbal 1 is rotated about the vertical axis Y, and the inner gimbal 2 supporting the rotating body 4 is rotated about the horizontal axis 3 by this rotation. Swing. As a result, the axis of the rotating body 4 moves. Then, a moment for canceling this movement is generated by the gyro effect, and the external force is canceled and vibration is suppressed.

Next, an embodiment according to the present invention in which the above gyro mechanism is incorporated in an actual railway vehicle carriage will be described with reference to FIGS.
In the railcar bogie according to the present invention, a frame (bogie frame) 10 is used as an outer gimbal. Bearings 15 and 15 are attached to the frame 10, and an axle 11 having wheels 12 attached between the bearings 15 and 15 is rotatably spanned. A vehicle is supported on the railcar carriage. The vehicle is rotatably supported with respect to the carriage via a vertical axis Y, and the carriage can be rotated about the vertical axis Y when an external force is applied to the carriage.

A support piece 26 is attached to the frame 10 functioning as the outer gimbal, and a drive motor M is supported on the support piece 26 via a horizontal axis X so as to be swingable in a vertical plane. The drive motor M rotatably supports the drive shaft 17 with an external casing 16 integrated with the horizontal shaft X. The external casing 16 corresponds to the internal gimbal 2.
A weight 14 hangs at one end of the horizontal axis X. When the drive motor M swings, the weight 14 becomes slanted, and the weight of the weight 14 returns the drive motor M to a horizontal state (neutral position). Like that.

The drive shaft 17 of the drive motor M is orthogonal to the horizontal axis X, and the drive shaft 17 in the neutral state is set to be parallel to the axle 11. Is fixed, and a rotating body 19 that exhibits a gyro effect is fixed to both sides.

The rotation of the drive gear 18 is transmitted to the axle 11 via the reduction gear train 20. The drive gear 18 employs a spherical gear so that power can be reliably transmitted even when the drive motor 16 swings. In addition to the spherical gear, other mechanisms capable of transmitting rotational power while allowing swinging, such as a saddle-shaped gear or a universal joint in which a large number of rods 21 shown in FIG.

The reduction gear train 20 includes a large-diameter gear 22 that meshes with the drive gear 18, a small-diameter gear 24 provided on the shaft 23 of the large-diameter gear 22, and a large-diameter gear provided on the axle 11 that meshes with the small-diameter gear 24. 25. In this embodiment, the shaft 23 and the axle 11 are set in parallel.

In the above, for example, when one wheel slips due to a tread gradient during straight running, the frame 10 rotates about the vertical axis Y. Due to this rotation, the drive motor 16 swings in the vertical plane around the horizontal axis X as shown in FIGS. This swing causes the weight 14 to move obliquely, and the weight of the weight 14 causes the drive motor 16 to return to the neutral position. Since the moment generated at this time acts in a direction to correct the lateral displacement of the carriage, the snake behavior is suppressed.

Here, the snake action is suppressed by the gyro effect itself, and the limit speed at which the snake action occurs is increased. Therefore, a weight is not absolutely necessary in a straight line. However, if a unidirectional force such as a centrifugal force continuously acts in disturbance and passing through a curve, the drive motor M is greatly increased in the vertical plane around the horizontal axis X as shown in FIGS. 7 (a) and 7 (b). If the rocking angle is increased to some extent, the gyro effect is reduced. For this reason, it is preferable to add a weight 14 in order to return the oscillation angle when the oscillation angle increases. A spring that generates a restoring force may be used instead of the weight 14.

FIG. 8 is a graph comparing the start speed of the snake action between the present invention and the conventional example. From this graph, when the gyro mechanism is not provided, that is, the degree of freedom around the X axis of the drive motor M is inserted with a spacer or the like. When killed, the snake behavior started at 2.9 m / s. However, when the gyro mechanism of the present invention is provided, that is, when the degree of freedom around the X axis of the drive motor M is utilized) Snake action did not start until 3.5 m / s. Therefore, it was confirmed that the stability during running was improved.

The above is an example of the present invention, and the present invention is not limited to the above embodiment. For example, in the illustrated example, the drive shaft of the drive motor that constitutes the gyro mechanism and the axle are parallel, but the drive shaft of the drive motor and the axle may be orthogonal.

  The bogie according to the present invention can be used as a bogie for a railway vehicle that requires traveling stability.

DESCRIPTION OF SYMBOLS 1 ... Outer gimbal, 2 ... Inner gimbal, 3 ... Support shaft, 4 ... Rotating body, 5 ... Spring, 10 ... Frame (bogie frame), 11 ... Axle, 12 ... Wheel, 13 ... Rail, 14 ... Weight, 15 ... Bearing, 16 ... outer casing of drive motor, 17 ... drive shaft, 18 ... drive gear, 19 ... rotating body, 20 ... reduction gear train, 21 ... rod, 22 ... large diameter gear, 23 ... small diameter gear, 25 ... large diameter Gear, 26 ... support piece, M ... drive motor, X ... horizontal axis, Y ... vertical axis.

Claims (3)

  In a railway vehicle carriage in which an axle having wheels fixed between bearings attached to a frame is rotatably supported, and the axle is rotated by a drive device having a rotating body such as a drive motor via a reduction gear train. The frame functions as an outer gimbal that can rotate around a vertical axis passing through an intermediate position of the axle, and an inner gimbal having a horizontal axis orthogonal to the vertical axis is provided inside the outer gimbal. A driving device having the rotating body is supported on a horizontal axis of the gimbal so as to be swingable in a vertical plane, and a rotating body and a driving gear exhibiting a gyro effect are attached to the driving shaft of the driving device having the rotating body. And at least one of the drive gear and the driven gear constituting the reduction gear train meshing with the drive gear is configured to follow the swing of the drive device including the rotating body. Bogie for a railway vehicle, wherein the door.   2. The railway vehicle carriage according to claim 1, wherein a drive shaft of the drive motor is orthogonal to a horizontal axis of the inner gimbal and substantially parallel to the axle at a neutral position. Trolley.   3. The railway vehicle carriage according to claim 1 or 2, wherein at least one of the drive gear of the drive motor or the driven gear constituting the reduction gear train meshing with the drive gear is a spherical gear. Trolley.

Images