JP4808507B2 - Axle box assisted steering cart for railway vehicles - Google Patents

Description

  The present invention relates to a rail car axle box assist steering carriage.

  The bogie with a steering function that is currently in practical use uses a steering beam, a steering lever, and a connecting rod to change the bogie angle between the body (steering beam) and the bogie frame (relative rotation angle about the yaw direction between the bogie and the body). Is transmitted to the axle box to mechanically control the attack angle of the front and rear wheel axles. The use of such a mechanism has been confirmed to be effective in reducing lateral pressure in a circular curve. However, even if mechanical steering is performed, at the point of curvature change such as the entrance / exit of the relaxation curve of the track, since the bogie angle is not sufficiently mechanically generated, the effect tends to be low.

In view of this, the present inventors have proposed an assist steering cart in which a steering force is applied by an actuator at the curvature change point of the track to reduce the lateral pressure on the relaxation curve (see Patent Document 1).
FIG. 3 is a schematic view of a conventional assist steering carriage for a railway vehicle, and FIG. 4 is a side view of the assist steering carriage.

  In these drawings, 51 is a bogie frame, 52 is a steering rotating body pivotally supported by the bogie frame 51, 53 is a rotating shaft of the steering rotating body 52, 54 is a front wheel, 55 is a wheel shaft, and 56 is an axle box. , 57 is a shaft box front / rear support spring arranged between the axle box 56 and the front wheel steering link (passive steering link) 58, and 59 is a steering control force control arranged between the wheel axle 55 and the front wheel steering link 58. Actuator (actuator for active steering control), 60 is a mounting portion of the front wheel steering link 58 to the steering rotating body 52, 61 is a rear wheel, 62 is a axle box, 63 is a wheel axle, and 64 is a rear of the axle box 62. An axle box front / rear support spring disposed between the side wheel steering link (passive steering link) 65, 66 is a steering control force control actuator (active steering) disposed between the wheel shaft 63 and the rear wheel steering link 65. Controlling actuator) 67 is a mounting portion of the steering rotating body 52 for the rear wheel steering link 65.

Here, the steering control force control actuators 59 and 66 for performing active steering and the axle box front and rear support springs 57 and 64 are installed in parallel. This is because the axle box front and rear support springs 57 and 64 can bear the minimum axle box support rigidity even if the steering control force control actuators 59 and 66 that perform active steering fail. .
JP 2005-262957 A

However, the above-described conventional assist steering carriage has difficulty in actual application because an actuator is attached between the steering link and the axle.
In view of the above situation, the present invention provides an axle box assist steering carriage for a railway vehicle that can generate a turning torque accurately between the carriage frame and the axle box and assist the turning operation of the carriage with a simple configuration. The purpose is to do.

[1] In a bogie angle-linked steering bogie for a railway vehicle having a side receiving plate (4) between the bogie frame (1) and the steering beam (3) , the bogie frame (1) and the axle box (7) There is provided an actuator (11) in the middle, a turning torque is generated as the carriage turns on the relaxation curve, and the axle box assist steering carriage for the railway vehicle assists the turning operation of the carriage. A steering lever (5) fixed to the steering lever (5) and a steering link (6) disposed between the steering lever (5) and the wheel shaft (8) are disposed, and the front and rear of the axle are supported together with the actuator (11). The front and rear support springs (10) for maintaining rigidity are arranged, and the rotational displacement of the carriage generated with respect to the steering beam (3) when passing through the curve is fixed via the steering lever (5) and the steering link (6). Ratio to the axle box (7) and manipulate the wheel axle (8) In addition, the position information of the curve entrance relaxation curve and the exit relaxation curve is preliminarily stored in the vehicle as a database, referring to the travel position of the own vehicle, and according to the change state of the track curvature and the travel speed of the vehicle When an assist steering force is applied to the actuator (11) to steer the wheel shaft (8) and enter a curve and a bogie bogie angle is generated, the steering link (6) is connected to the front and rear support springs (10) and A rail car axle box assist steering carriage characterized in that the actuator (11) is displaced simultaneously .

  According to the present invention, an actuator can be easily provided between a bogie frame and a shaft box of a bogie angle-linked steering bogie, and ground data such as track curvature, point detection during vehicle travel, and vehicle speed verification. By generating turning torque as the carriage turns in the relaxation curve, the turning resistance of the carriage can be reduced by assisting the turning operation of the carriage, and the generated lateral pressure during running of the relaxation curve is reduced. Can be made.

The bogie angle-linked steering bogie for railcars having a side plate between the bogie frame and the steering beam of the present invention is provided with an actuator between the bogie frame and the axle box, and the bogie turns in a relaxation curve. In addition, it is a rail car axle box assist steering carriage that generates turning torque and assists the turning movement of the carriage, and is a steering link that is arranged between the steering wheel and the steering wheel fixed to the steering beam. And a front / rear support spring that maintains the front / rear support rigidity of the axle in parallel with the actuator, and the rotational displacement of the carriage generated with respect to the steering beam when passing the curve is constant via the steering lever and the steering link. This is transmitted to the axle box with the lever ratio, and the wheel axle is steered into a letter C, and the vehicle has in advance the position information of the entrance relaxation curve and the exit relaxation curve of the curve as a database, and the traveling position of the own vehicle is determined. The steering link is applied to the actuator when an assist steering force is applied to the actuator according to the change state of the curvature of the track and the traveling speed of the vehicle, the wheel shaft is steered, the vehicle enters a curve, and a bogie bogie angle is generated. Simultaneously displaces the front and rear support springs and the actuator .

FIG. 1 is a top view of a rail car axle box assist steering cart according to an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of an actuator control system of the rail car axle box assist steering cart.
In these figures, 1 is a bogie frame, 2 is a bogie center pin (steering beam center pin), 3 is a steering beam, 4 is a side receiving plate, 5 is a steering lever, 6 is a steering link, 7 is an axle box, 8 Is a wheel shaft, 9 is a wheel, 10 is a front / rear support spring, 11 is an assist steering actuator, 12 is a control device, 13 is position information of the curvature change point of the track, and 14 is vehicle travel position information.

First, the structure of the base truck will be described.
This bogie is a bogie angle steering bogie having a steering beam 3 that can turn around a bogie center pin (steering beam center pin) 2 with respect to a bogie frame 1. A side receiving plate 4 is arranged between the carriage frame 1 and the steering beam 3 so as to generate a rotational resistance during turning by an amount corresponding to the weight of the vehicle body x the friction coefficient. The rotational displacement of the carriage generated with respect to the steering beam (vehicle body) 3 when passing the curve is transmitted to the axle box 7 with a constant lever ratio via the steering lever 5 and the steering link 6, and the wheel shaft 8 is steered into a letter C. ing. That is, after entering the relaxation curve and the bogie starts to turn, the bogie turning resistance is reduced by the generated force of the assist steering actuator 11, and the horizontal axis on the leading shaft outer gauge side is reduced.

The assist steering actuator 11 can be easily disposed between the carriage frame 1 and the axle box 7.
When a vehicle body bogie angle (rotation in the yaw direction of the carriage) occurs, the steering link 6 steers the wheel shaft 8 together with the front and rear support rubber and the assist steering actuator 11. Therefore, since the assist steering actuator 11 performs force control and steers in accordance with the curve direction, mechanical steering is not hindered.

When the control system fails, the hydraulic system is configured so that the actuator generation force becomes zero. Therefore, even when the control system fails, characteristics equivalent to mechanical steering without assistance can be ensured.
In FIG. 2, the control device 12 takes in the position information 13 of the track curvature change point and the vehicle travel position information 14. Further, an output signal from the control device 12 is configured to be output to the assist steering actuator 11.

  Therefore, the assist steering actuator 11 performs control so that the generated force approaches the target value from the control device 12. The operation of the assist steering actuator 11 is force-controlled, 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 the current controlled pendulum vehicle can be considered. The position information 13 of the track curvature change point is investigated in advance, and assist steering is performed in accordance with the curvature change rate at the entrance of the relaxation curve while referring to the traveling position information 14 of the own vehicle. When the vehicle traveling position in the relaxation curve advances and the bogie bogie angle gradually increases, the wheel steering angle increases as the bogie angle increases even if the assist steering amount by the assist steering actuator 11 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.

Next, the configuration of the rail car axle box assist steering carriage will be described.
An assist steering actuator 11 that generates a truck turning torque is disposed between the truck frame 1 and the axle box 7. In the entrance side and exit side relaxation curves of the track, when the carriage turns according to the change in curvature, turning torque is generated by the assist steering actuator 11 to reduce the turning resistance of the carriage 9 and the rails (illustrated). To reduce the lateral pressure generated between

  Further, the turning torque by the generated force of the assist steering actuator 11 is set to be equal to or less than the side friction torque, and the cart does not turn only by the generated force. Therefore, the cart does not turn even during the control system failure. Control of the generated force of the assist steering actuator 11 is performed only on the relaxation curve and the sections before and after that by comparing ground data (curvature) measured in advance with point detection and speed.

As described above, with respect to the bogie angle-linked steering cart having the side receiving plate 4 between the cart frame 1 and the steering beam 3, an assist operation that generates a turning torque between the cart frame 1 and the axle box 7 is performed. the Kajia actuator 11 so as to newly attached. In addition, the turning torque generated by the assist steering actuator is set to be equal to or less than the side receiving friction torque so as to ensure fail-safety.
As described above, since the assist steering actuator is provided between the bogie frame and the axle box of the bogie angle-linked steering bogie, the relaxation curve is obtained by comparing ground data such as curvature, point detection during vehicle travel, and vehicle speed. In this case, the turning torque can be generated in accordance with the turning of the carriage, and the turning resistance of the carriage can be reduced. Therefore, by assisting the turning operation of the carriage, the lateral pressure in the relaxation curve is reduced.

  The axle box assisted steering cart for a railway vehicle according to the present invention is coupled with a bogie angle that generates a turning torque as the cart turns on the relaxation curve, assists the turning operation of the cart, and reduces the lateral pressure on the relaxation curve. It can be used as a steering cart.

1 is a top view of a rail car axle box assist steering carriage according to an embodiment of the present invention. It is a schematic block diagram of the control system of the actuator of the axle box assist steering cart for railway vehicles of this invention. It is a schematic diagram of the conventional assist steering cart for railway vehicles. It is a side view of the conventional assist steering cart for rail vehicles.

1 Bogie frame 2 Bogie center pin (steering beam center pin)
DESCRIPTION OF SYMBOLS 3 Steering beam 4 Side receiving board 5 Steering lever 6 Steering link 7 Shaft box 8 Wheel shaft 9 Wheel 10 Front and rear support spring 11 Assist steering actuator 12 Control device 13 Position information of curvature change point of track 14 Vehicle traveling position information

Claims (1)

In a bogie angle-linked steering bogie for railcars that has a receiving plate between the bogie frame and the steering beam, an actuator is provided between the bogie frame and the axle box, and turns as the bogie turns in the relaxation curve. An axle box assist steering cart for a railway vehicle that generates torque and assists the turning operation of the cart, and is provided with a steering link fixed between the steering wheel and the steering wheel fixed to the steering beam. The front and rear support springs that maintain the front and rear support rigidity of the axle are provided in combination with the actuator, and the rotational displacement of the carriage generated with respect to the steering beam when passing through the curve is constant through the steering lever and the steering link. To the axle box, steer the wheel axle into a letter C, and have the vehicle's position information of the entrance relaxation curve and exit relaxation curve in advance as a database, and refer to the running position of the vehicle On the other hand, if the steering wheel is steered by applying an assist steering force to the actuator according to the change state of the curvature of the track and the traveling speed of the vehicle to enter the curve and the bogie bogie angle is generated, the steering link is An axle box assist steering carriage for a railway vehicle, wherein the front and rear support springs and the actuator are displaced simultaneously .

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