JP2005262957A - Assist steering truck for rolling stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assist steering truck for rolling stock capable of realizing the lateral pressure reducing effect at a curvature changing point by adding the steering function by the control to a passive steering truck. <P>SOLUTION: The assist steering truck for rolling stock comprises passive steering links 8, 15 arranged between a steering turning body 2 pivotably supported by a truck frame 1 and axle boxes 6, 12, and actuators 9, 16 to perform the active steering which are installed parallel to the passive steering links 8, 15 while one end thereof is fixed to the passive steering links 8, 15 and the other end is fixed to wheel axles 5, 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an assist steering carriage for a railway vehicle.

A cart with a steering function currently in practical use detects a bogie angle between a vehicle body (steering beam) and a cart frame by a steering link, and mechanically controls the attack angle of the front and rear wheel shafts (Patent Document 1 below). reference). Use of such a mechanism has been confirmed to be effective in reducing lateral pressure in a circular curve.
JP-A-10-203364

  However, in the conventional cart with a steering function, even if mechanical steering control is performed, the bogie bogie angle is not mechanically generated at the curvature change point such as the relaxation curve entrance / exit, so that the effect is low.

  In view of the above situation, an object of the present invention is to provide an assist steering cart for a railway vehicle that adds a steering function by control to a passive steering cart and provides a lateral pressure reduction effect at a curvature change point.

In order to achieve the above object, the present invention provides
[1] In an assist steering carriage for a railway vehicle, a passive steering link disposed between a steering rotating body pivotally supported by a carriage frame and an axle box, one end being fixed to the passive steering link, and the other end being And an actuator for performing active steering, which is fixed to a wheel shaft and is installed in parallel with the passive steering link.

  [2] In the assist steering bogie for the railway vehicle according to [1], the actuator is controlled by a control device, and the generated force is controlled to approach a target value from the control device.

  [3] In the assist steering bogie for the railway vehicle described in [2] above, the control device is configured to determine a relaxation curve while referring to the travel position information of the own vehicle based on the position information of the curvature change point investigated in advance. It is characterized by active steering at the entrance according to the rate of change of curvature.

  ADVANTAGE OF THE INVENTION According to this invention, the steering function by control can be added to a passive steering trolley | bogie, and the lateral pressure reduction effect in a curvature change point can be brought about.

  A passive steering link disposed between a steering rotating body pivotally supported by a carriage frame and a shaft box; one end fixed to the passive steering link; the other end fixed to a wheel shaft; and the passive steering link It is equipped with an actuator that performs active steering installed in parallel, and brings about a lateral pressure reduction effect at the curvature change point.

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is a schematic view of an assist steering carriage for a railway vehicle showing an embodiment of the present invention, and FIG. 2 is a side view of the assist steering carriage.

  In this figure, 1 is a bogie frame, 2 is a steering rotating body pivotally supported by the bogie frame 1, 3 is a rotating shaft of the steering rotating body 2, 4 is a front wheel, 5 is a wheel shaft, 6 is an axle box, Reference numeral 7 denotes a shaft box front / rear support spring disposed between the axle box 6 and the front wheel steering link (passive steering link) 8, and 9 denotes a steering control force control actuator disposed between the wheel shaft 5 and the front wheel steering link 8. (Actuator for active steering control) 10 is an attachment portion of the steering link 8 for the front wheel to the steering rotating body 2, 11 is a rear wheel, 12 is a axle box, 13 is a wheel axle, 14 is a axle box 12 and the rear side Axle box front / rear support spring disposed between the wheel steering link (passive steering link) 15, 16 is a steering control force control actuator (active steering control actuator) disposed between the wheel shaft 13 and the rear wheel steering link 15. ), 17 is the rear side A mounting portion to the steering rotating body 2 of the wheel steering link 15.

  Here, the steering control force control actuators 9 and 16 that perform active steering and the passive steering links 8 and 15 are installed in parallel. This is because the axle springs 7 and 14 can bear the minimum axle box support rigidity even if the steering control force control actuators 9 and 16 that perform active steering fail.

  FIG. 3 is a schematic configuration diagram of the control system of the steering control force control actuator.

  In this figure, 21 is a control device, and this control device 21 takes in the position information 22 of the curvature change point of the vehicle and the current travel position information 23.

  Therefore, the steering control force control actuators 9 and 16 perform control so that the generated force approaches the target value from the control device 21. The actuator operation is force control, and the maximum generated force is limited to improve the fail-safe property when reverse steering is performed for some reason. As a steering control operation, a system using a ground database similar to that of the current controlled pendulum vehicle can be considered. The position information 22 of the curvature change point is examined in advance, and active steering is performed in accordance with the change rate of the curvature at the entrance of the relaxation curve while referring to the traveling position information 23 of the own vehicle. As the vehicle traveling position in the relaxation curve advances and the bogie bogie angle gradually increases, the wheel steering angle increases with an increase in the bogie angle even if the assist steering amount by the steering control force control actuators 9 and 16 is constant. In the circular curve, even if the assist steering amount is returned to almost zero, the mechanical wheel shaft steering is performed by the bogie bogie angle, so that appropriate wheel shaft steering can be performed.

  By performing such an operation, the drive stroke of the actuator is significantly smaller in the assist steering than in the case where the radial position of the wheel shaft is realized by complete full active steering, and the fail-safe property can be improved.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The assist steering cart for a railway vehicle of the present invention can be used as a steering cart that can perform appropriate wheel-shaft steering.

It is a schematic diagram of the assist steering cart for railway vehicles which shows the Example of this invention. It is a side view of the assist steering cart which shows the Example of this invention. 1 is a schematic configuration diagram of a control system for a steering control force control actuator according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bogie frame 2 Steering rotation body 3 Steering rotation body rotation axis 4 Front wheel 5,13 Wheel shaft 6,12 Axis box 7,14 Axle box front and rear support spring 8 Front wheel steering link (passive steering link)
9, 16 Steering control force control actuator 10 Attaching part of front wheel steering link to steering rotating body 11 Rear wheel 15 Rear wheel steering link (passive steering link)
17 Attaching part of steering link for rear wheel to steering rotating body 21 Control device 22 Position information of curvature change point 23 Traveling position information

Claims (3)

(A) a passive steering link disposed between a steering rotating body pivotally supported by the carriage frame and the axle box;
(B) A railway vehicle assist comprising: an actuator for performing active steering, wherein one end is fixed to the passive steering link, the other end is fixed to a wheel shaft, and the actuator is installed in parallel with the passive steering link. Steering cart.   The assist steering carriage for a railway vehicle according to claim 1, wherein the actuator is controlled by a control device so that the generated force is controlled to approach a target value from the control device. .   The assist steering carriage for a railway vehicle according to claim 2, wherein the control device is configured to determine the curvature at the entrance of the relaxation curve while referring to the traveling position information of the own vehicle based on the positional information of the curvature change point investigated in advance. An assist steering cart for railway vehicles, characterized by active steering according to the rate of change.

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