JP2005170341A - Articulated cars - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide articulated cars meeting both the straight running characteristic at a high speed and the steeply curved track running characteristic at a low speed. <P>SOLUTION: The articulated cars are structured so that motors in two electromagnetic dampers are connected in series to a common converter circuit for converting into thermal energy, when running along a steep curved line at low speed. Yawing is generated between the cars A and B when the cars run along the track in this condition. At this time, the dampers 21 and 22 make compression (elongation) in the same amount, so that the motors rotate in the same direction and no current flows, and damping force is not generated. As a result, there is no resistance against yawing, and the yawing can be made freely. If meandering is generated, one of the dampers 21 and 22 is compressed and the other is elongated, so that the motors rotate in the opposite directions. When two motors rotate in the opposite direction to each other, current flows in the circuit, which is converted into a thermal energy to cause generation of a damping force. As a result, the meandering motion is suppressed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an articulated vehicle in which two vehicles are joined in the front-rear direction.

  Patent Document 1 proposes a configuration in which a carriage is arranged at a connection position of two vehicles connected in the front-rear direction. In FIG. 6 of this Patent Document 1 and related portions, a carriage is arranged at the connecting portion of the front and rear vehicles, and an actuator is interposed between the carriage frame of the carriage and the front and rear vehicles, and the actuator is driven. Describes that self-steering assistance is provided.

  In addition, in Patent Document 2, although it is not a connection location of two vehicles connected in the front-rear direction, a uniaxial carriage is arranged at the end of one vehicle, and the uniaxial carriage and the other vehicle are connected by a link, It is disclosed that a damper that suppresses the left-right movement of the carriage is provided between the bearing box of the carriage and the vehicle body to prevent excessive lateral displacement between the vehicle body and the wheel shaft.

Furthermore, Patent Document 3 proposes an electromagnetic damper as a damper for a vehicle. This electromagnetic damper incorporates a DC (direct current) motor inside, rotates the rotor or stator constituting the motor by linear movement of the cylinder or swing of the arm, and converts the electromotive force generated in the solenoid by electromagnetic induction into a damping force. It is configured.
JP 2002-87262 A, FIG. JP 2001-63567 A JP 2003-227543 A

  Railway vehicles are required to have running stability and curving ability. However, it is difficult to achieve both the running stability at high speed and the sharp turning ability at low speed.

  For example, in Patent Document 1, it is possible to self-steer a carriage at a vehicle connection portion by driving an actuator, but it cannot exhibit a damping effect against yawing between vehicles, and conversely a damper instead of an actuator. If this is provided, the lateral pressure will increase when passing through a sharp curve.

  Further, as disclosed in Patent Document 2, even if a damper that suppresses the left-right movement of the carriage is provided, a damping effect on yawing between the two vehicles cannot be exhibited. Similarly, Patent Document 3 describes a connected vehicle. Is not described at all.

  An object of the present invention is to achieve both running stability and sharp curve turning ability for an articulated vehicle in which yawing between vehicle bodies must be taken into consideration.

  In order to solve such a problem, the present invention provides a front and rear electromagnetic damper in which the rigidity at the connecting portion is set high during high-speed traveling or straight traveling, and the rigidity at the connecting portion is set low during low-speed traveling or curved traveling. Placed in the connecting part of the vehicle.

  Further, the present invention is an articulated vehicle in which a carriage is arranged at a location where two vehicles are connected in front and rear, and an electromagnetic damper is provided between the carriage frame or bolster of the carriage and each vehicle. A motor such as a DC motor is incorporated in the electromagnetic damper, and these motors can be switched to an external circuit common to an independent external circuit for converting electromotive force generated by electromagnetic induction into thermal energy (kinetic damping force). It was set as the structure made.

  In the above configuration, each electromagnetic damper exhibits a damping function individually by connecting the motor in each electromagnetic damper to an independent thermal energy conversion circuit. When the motors in each electromagnetic damper are connected in series to a common external circuit, no electromotive force is generated when the motors rotate in the same direction, and electromotive force is generated when the motors rotate in the opposite direction. Converted into thermal energy.

  In the switching of the circuit, for example, the motors are connected to independent external circuits during high-speed traveling or straight-line traveling, and the motors are connected to a common external circuit during low-speed traveling or steep curve traveling.

  The trolley may be either a uniaxial trolley or a single wheel independent rotary trolley, and the electromagnetic damper may be a direct acting damper or a rotary damper.

  According to the present invention, a bogie frame or a bolster of a bogie provided at a connection location of two vehicles and each vehicle are coupled by an electromagnetic damper, and the motor rotates as a circuit to which a motor incorporated in these electromagnetic dampers is connected. Since it is possible to selectively switch to a common external circuit for converting heat energy into an independent external circuit for converting the electromotive force generated by being forced into heat energy, as a damper only when necessary Can act.

  Therefore, it is possible to simultaneously satisfy both the stability in the straight running at high speed and the followability in the sharp curve running.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of an intermediate articulated triaxial vehicle as an articulated vehicle according to the present invention, FIG. 2 is an enlarged side view of a connecting portion between an articulated carriage and front and rear vehicles, and FIG. 3 shows a simplified structure of FIG. It is a figure.

  In the intermediate articulated triaxial vehicle, the single-shaft carriage 1 is disposed at the joint portion between the front and rear vehicles A and B, and the single-shaft carriages 2 and 3 are disposed in the vehicles A and B, respectively. The uniaxial cart 1 of the connecting portion is configured by attaching a pair of left and right wheels 11 to an axle 10 to constitute a wheel shaft, and both ends of the axle 10 are rotatably supported by a shaft box 12 on the shaft box 12 with high rigidity. A bogie frame 14 is supported via a vibration rubber 13, and a bolster 16 is supported on the bogie frame 14 via a pillow spring 15. The bolster 16 and the vehicle A are connected by a bolster anchor 17, and the vehicle A The vehicle B is connected with a center pin 18.

  Further, the bogie frame 14 and the bolster 16 are connected via a pin 19 so as to be rotatable. The cart frame 14 and the bolster 16 may be connected via a parallel link mechanism instead of the pin 19.

  Electromagnetic dampers 21 and 22 are interposed between the carriage frame 14 and the front and rear vehicles A and B, respectively. Electromagnetic dampers 23 and 24 are also provided between the bogie frames of the single-shaft bogies 2 and 3 and the vehicles A and B, respectively. In this way, the bogie frame 14 is rotatable relative to the bolster 16 and is connected to the vehicle by the electromagnetic dampers 21 and 22. Behavior is suppressed.

  As shown in FIG. 4, the electromagnetic dampers 21 to 24 are structured such that a piston 31 is slidably inserted into a cylinder 30, and a DC motor 32, a reduction gear 33, a ball screw 34, and a nut 35 are inserted into the cylinder 30. Are connected to the end portions of the cylinder 30 and the piston 31. In the electromagnetic dampers 21 and 22, the connecting portion 36 is connected to the vehicle A or B, and the connecting portion 37 is connected to the carriage frame 14. Respectively.

  5 to 9 are views similar to FIG. 3 showing another embodiment. In the embodiment shown in FIG. 5, the front and rear vehicles A and B are connected by a normal coupler 25, and the vehicle Each of A and B is supported at two points by a bolster 16.

  In the embodiment shown in FIG. 6, the vehicle A and the bolster 16 are connected by a bolster anchor 17, and an electromagnetic damper 21 is interposed between the bolster 16 and the carriage frame 14, so that the vehicle B and the carriage frame 14 are An electromagnetic damper 22 is interposed between the two.

  The embodiment shown in FIGS. 5 and 6 is a direct mount system in which the bolster 16 is provided directly on the carriage frame 14, but in the embodiment of the indirect system shown in FIG. A bolster anchor 17 is interposed between the bolster 16 and the bolster 16, an electromagnetic damper 21 is provided between the bolster 16 and the vehicle A, and an electromagnetic damper 22 is provided between the bolster 16 and the vehicle B.

  The embodiment shown in FIG. 8 is also an indirect system as in FIG. 7. In this embodiment, an electromagnetic damper 21 is provided between the carriage frame 14 and the vehicle A, and the electromagnetic damper is provided between the carriage frame 14 and the vehicle B. 22 is provided.

  In the embodiment shown in FIG. 9, an electromagnetic damper 21 is provided between the carriage frame 14 and the vehicle A, and an electromagnetic damper 22 is provided between the bolster 16 and the vehicle B.

  FIG. 10A is a plan view of the articulated vehicle at the time of straight running. In this state, neither the electromagnetic dampers 21 nor 22 extend or contract. FIG. 10B is a plan view of the articulated vehicle at the time of running on a curve. In this state, the electromagnetic dampers 21 and 22 are simultaneously expanded or compressed. FIG. 10C is a plan view of a state where the carriage is snaked. In this state, one electromagnetic damper 21 expands and the other electromagnetic damper compresses.

  Next, the operation of the electromagnetic dampers 21 and 22 will be described. FIG. 11A is a diagram illustrating a state in which the motors in the two electromagnetic dampers are connected to an independent thermal energy conversion circuit, and FIG. 11B is a thermal energy conversion circuit in which the motors in the two electromagnetic dampers are shared. FIG. 12 (a) is a diagram illustrating a circuit when two motors are rotated in the same direction in the connection state of FIG. 11 (b). ) Is a diagram illustrating a circuit when two motors are rotated in directions opposite to each other in the connection state of FIG.

  Returning to each traveling state of FIG. 10, when the vehicle travels linearly at the high speed shown in FIG. 10 (a), the motors in the two electromagnetic dampers are converted to independent thermal energy as shown in FIG. 11 (a). Connect to the conversion circuit. By doing in this way, the electromagnetic dampers 21 and 22 act as independent dampers.

  On the other hand, when traveling along a sharp curve at a low speed, the motors in the two electromagnetic dampers are connected in series to a common thermal energy conversion circuit as shown in FIG. When the vehicle travels along the track in this state, yawing occurs between the vehicles A and B as shown in FIG. At this time, since the electromagnetic dampers 21 and 22 are compressed (expanded) by an equal amount, the motor rotates in the same direction. When the two motors rotate in the same direction, no current flows as shown in FIG. As a result, there is no resistance to yawing and yawing is performed freely.

  Further, when traveling on a sharp curve at a low speed, as shown in FIG. In this case, since one of the electromagnetic dampers 21 and 22 is compressed and the other is expanded, the motors rotate in opposite directions. When the two motors rotate in directions opposite to each other, a current flows through the circuit and is converted into heat energy as shown in FIG. As a result, snake behavior is suppressed.

  In the illustrated example, the electromagnetic dampers 21 and 22 are arranged on one side, but may be arranged separately on the left and right. In this case, since the expansion / contraction directions of the electromagnetic dampers 21 and 22 are reversed when passing through the curve, it is necessary to change the circuit assembly method. In any case, a damping force may be exerted when the carriage meanders and no damping force is generated against yawing between vehicles.

  Moreover, about the arrangement layout of an electromagnetic damper, it is good also as arrangement | positioning which makes only one side, or one side one side (point symmetry). Furthermore, although the electromagnetic damper is provided directly or indirectly between the bogie frame or the vehicle in the embodiment, it may be provided between the vehicle and the vehicle.

Side view of articulated vehicle according to the present invention Enlarged side view of the joint between the articulated carriage and the front and rear A simplified diagram of the structure of FIG. Cross section of direct acting electromagnetic damper The same figure as FIG. 3 showing another embodiment The same figure as FIG. 3 showing another embodiment The same figure as FIG. 3 showing another embodiment The same figure as FIG. 3 showing another embodiment The same figure as FIG. 3 showing another embodiment (A)-(c) is a top view of the articulated vehicle when driving conditions are varied. (A) is a figure which shows the state which connected the motor in two electromagnetic dampers to the conversion circuit to independent heat energy, (b) is in series with the conversion circuit to the common heat energy for the motor in two electromagnetic dampers. Diagram showing the state connected to FIG. 11A is a connection state of FIG. 11B, and is a diagram illustrating a circuit when two motors are rotated in the same direction. FIG. 11B is a connection state of FIG. The figure explaining the circuit when the motors are rotated in opposite directions

Explanation of symbols

  A, B ... Vehicle, 1, 2, 3 ... 1 axle bogie, 10 ... Axle, 11 ... Wheel, 12 ... Shaft box, 13 ... Anti-vibration rubber, 14 ... Bogie frame, 15 ... Pillow spring, 16 ... Bolster, 17 Bolster anchor, 18 ... center pin, 19 ... pin, 21, 22, 23, 24 ... electromagnetic damper, 25 ... coupler, 30 ... cylinder, 31 ... piston, 32 ... motor, 33 ... reduction gear, 34 ... ball screw, 35 ... nuts, 36, 37 ... connecting portions.

Claims (4)

The electromagnetic damper, which has a high rigidity at the connecting part during high-speed driving or straight-line driving, and a low rigidity at the connecting part during low-speed driving or curved driving, is arranged at the connecting part of the front and rear vehicles. Articulated vehicle. An articulated vehicle in which a carriage is arranged at a joint location of two vehicles connected in the front-rear direction, and an electromagnetic damper is provided between the carriage frame or bolster of the carriage and each vehicle. These motors are connected to an independent external circuit for converting electromotive force generated by electromagnetic induction into thermal energy and to a common external circuit so as to be switchable. 3. The articulated vehicle according to claim 1 or 2, wherein each motor is connected to an independent external circuit during high speed traveling or straight traveling, and the motor is connected to a common external circuit during low speed traveling or sharp curve traveling. A connected vehicle characterized by being connected. 4. The articulated vehicle according to claim 1, wherein the cart is a single-shaft cart, and the electromagnetic damper is a direct acting damper or a rotary damper.