JP5267859B2 - Railway vehicle steering carriage and railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein a bogie is complicated and increased in weight by a steering mechanism. <P>SOLUTION: Eddy current type rail brakes 14 are arranged in a bogie 12 frame at respective positions opposed to a pair of rails 2. These eddy current type rail brakes 14 are individually operably constituted. When traveling on a curved road, the bogie is steered by operating only the eddy current type rail brake 14a positioned inside a curve. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a steering cart that steers a cart using an eddy current rail brake when passing through a curved road, and a railway vehicle equipped with the steering cart.

  In order to reduce the turning resistance force (lateral pressure) acting on the wheels when passing through a curved road, there is a steering cart that moves the wheel shaft so that the wheels follow the curved road. In this steering cart, the steering device is attached to the cart or the vehicle body so that the center line of the wheel shaft is directed in the radial direction of the curved road.

For example, in Patent Document 1, the carriage is turned according to the radius of the curved road by attaching an actuator between the carriage frame and the vehicle body. Moreover, in patent document 2, the wheel shaft is turned according to the radius of a curved road by attaching a link mechanism between a trolley | bogie and a wheel shaft.
JP 2002-87262 A Japanese Patent No. 3448445

  However, by additionally attaching a mechanical steering mechanism such as an actuator or a link mechanism, when steering is performed so that the center line of the wheel shaft faces the radial direction of the curved road, the configuration of the carriage becomes complicated and the weight increases. There's a problem. Further, when the steering mechanism is damaged, the wheel shaft may be moved in a direction opposite to the radial direction of the curved road, which may lead to derailment.

  The problem to be solved by the present invention is that in the case of a steering cart that steers a wheel shaft by additionally mounting a mechanical steering mechanism, the configuration of the cart becomes complicated and the weight increases. In addition, when the steering mechanism is damaged, there is a risk of derailment.

The railway vehicle steering carriage of the present invention,
To solve the problem that the steering mechanism is complicated and heavy by the steering mechanism,
An eddy current type rail brake is provided at each position of the carriage frame facing the paired rails,
The most important feature is that these eddy current type rail brakes can be individually operated.

  In the steering cart according to the present invention, since the mechanical steering mechanism is additionally attached and the eddy current rail brake is also used as the steering mechanism, there is no problem that the cart is complicated and heavy.

In the railway vehicle steering cart of the present invention, when traveling on a curved road, only the eddy current type rail brake located inside the curve is operated to steer the cart. Therefore, so that a control device for controlling as described above.

  Further, in the railway vehicle steering carriage of the present invention, the eddy current type rail brake uses a permanent magnet, and is non-contacting with the rail at the time of braking and non-braking, there is no aggressiveness to the rail, In addition, it is not easily affected by the weather, and the weight of the entire steering mechanism can be reduced.

  This eddy current type rail brake matches, for example, the longitudinal direction of the rail when a magnet unit, which is fixed to a ferromagnetic support plate so that at least adjacent magnetic poles are different, is viewed from the carriage side. It is assumed that the braking and non-braking are switched by rotating around the axis to be operated. In this way, it is possible to easily control the braking force. In that case, it is desirable to provide a rotation angle adjustment mechanism for adjusting the braking force of the magnet unit.

  When the railway vehicle is provided with the steering carriage of the present invention, it is provided at least on the front carriage in the traveling direction. This is the railway vehicle of the present invention. By doing in this way, the lateral pressure which acts on the outer wheel side wheel of the front wheel axis of the vehicle can be suppressed, and safety can be improved while preventing noise and vibration when traveling on a curved road.

  According to the present invention, since an eddy current type rail brake is also used as a steering mechanism instead of additionally installing a mechanical steering mechanism, a steering cart that efficiently uses the eddy current type rail brake can be realized. Therefore, there is no problem that the carriage is complicated and heavy.

  The best mode for carrying out the present invention will be described below with reference to FIGS. 1 to 7 together with a new idea in the present invention and the progress from the idea to the solution of the problem.

In recent years, both Shinkansen (registered trademark) and conventional lines have been required to increase the speed, and it has become difficult to stop within the defined regulations after the operation of the emergency brake. As a countermeasure for this, it has been proposed to install an eddy current type rail brake on a bogie frame in addition to an existing brake device (for example, JP-A-10-167068).

  This eddy current rail brake is attached to the lower surface of the carriage frame facing the top surfaces of the two rails that make a pair in order to obtain deceleration performance, and simultaneously operates a pair of eddy current rail brakes during braking. .

The inventors considered to steer the bogie frame by this eddy current rail brake.
That is, when only the inner rail side (curve center side) of the curved road of the eddy current rail brake is operated when entering the curved road, the traveling direction with respect to the rail is on the inner rail side of the carriage frame. A load acts on the opposite side (braking direction), and a rotational moment is generated in the bogie frame. It is considered that, due to this rotational moment, the bogie frame rotates toward the radius center side (steering side) of the curved road, so that the center line of the wheel axis on the leading side in the traveling direction is directed in the radial direction of the curved road.

The railway vehicle steering carriage of the present invention is made on the basis of the above concept,
An eddy current type rail brake is provided at each position of the carriage frame facing the paired rails,
The most important feature is that these eddy current type rail brakes can be individually operated.

In the railway vehicle steering truck of the present invention, at the time of running of the curved road, it is actuated only eddy current rail brake which is located inside of the curve so that a control device for controlling so as to steer the dolly.

  The steering vehicle for a railway vehicle according to the present invention does not have an additional mechanical steering mechanism, and the eddy current type rail brake also serves as the steering mechanism. Therefore, the steering vehicle can be steered without causing a problem that the carriage is complicated and heavy. An effect can be obtained.

  In addition, in the railway vehicle steering carriage according to the present invention, if an eddy current type rail brake using a permanent magnet that is not in contact with the rail is used during braking and non-braking, there is no aggressiveness to the rail and the weather Stable steering performance can be obtained with little influence. In addition, the overall weight of the steering mechanism can be reduced.

  In other words, in the present invention, a pair of eddy current type rail brakes are attached to positions on the lower surface of the bogie frame facing the top surfaces of the paired rails. At the time of braking, the pair of eddy current type rail brakes are simultaneously operated to give a required braking force to the carriage and the vehicle. On the other hand, when entering a curved road, only the eddy current type rail brake located inside the curve is operated, and the carriage frame is turned inward with respect to the curved track.

  By the way, as an eddy current type rail brake attached to the railway vehicle steering carriage of the present invention, for example, one having the configuration described below is adopted.

  Reference numeral 1 denotes a magnet unit that constitutes an eddy current rail brake. As shown in FIG. 1, a plurality of permanent magnets 1a are fixed in series to a ferromagnetic support plate (yoke) 1b, and both ends of the yoke 1b are fixed. The provided shaft 1ba is supported by two brackets 1c so as to be freely rotatable.

  The plurality of permanent magnets 1a are arranged so that all adjacent permanent magnets 1a have different polarities, for example. The bogie frame is such that the two magnetic pole surfaces 1aa face the top surface 2a of the pair of rails 2 and the shaft 1ba coincides with the longitudinal direction of the rail 2 when viewed from the bogie side. Installed on.

  In the center of the yoke 1b, a saddle member 1d provided with a trunnion 1da is provided, and the movement of the rod of an air cylinder (not shown) is converted into a rotational motion via the trunnion 1da. As a result, the saddle member 1d rotates about the trunnion 1da, and the magnet unit 1 is rotated 90 degrees about the shaft 1ba via the link 1e, thereby switching between braking and non-braking.

  Incidentally, FIG. 2 shows an image when switching from braking to non-braking using the two-pole permanent magnet 1a.

  In the case of the magnet unit 1, the position where the magnetic pole surface 1aa of the permanent magnet 1a faces the top surface 2a of the rail 2 is the braking state in which the braking force is maximized (see FIG. 2A).

  Then, from this braking state, the rod of the air cylinder is retracted, for example, and the permanent magnet 1a and the yoke 1b are rotated. As shown in FIG. 2 (d) through FIGS. Are separated from the top surface 2 a of the rail 2. This state is a non-braking state.

  In the present invention having the above-described configuration, braking force is generated even at the positions as shown in FIG. 2B and FIG. 2C. By providing a rotation angle adjustment mechanism for the permanent magnet 1a, The braking force at the time of braking can also be adjusted.

  Thus, by switching between braking and non-braking by rotation, the magnetic path between the magnetic pole surface 1aa of the permanent magnet 1a and the top surface 2a of the rail 2 can be shortened, and magnetic efficiency is increased. It becomes possible to reduce the weight.

  1f is a protective cover made of a magnetic material that covers the magnetic pole surface 1aa of the permanent magnet 1a in the non-braking state of a plurality of permanent magnets 1a fixed in series to the yoke 1b. This prevents the fallen magnetic material from being attracted. Further, this protective cover 1f can prevent magnetic leakage during non-braking.

Considering the case where a vehicle of the Shinkansen (registered trademark) , for example, without the eddy current rail brake is passing a curved road with a radius of 2500 m, as shown in FIG. Located in parallel.

  However, when the carriage 12 mounted at a position separated from the longitudinal center C1 of the vehicle body 11 by a distance L (= 8.75 m) is parallel to the vehicle body 11, the curve is different from that during traveling on the straight road shown in FIG. Drive with an angle of θ1 (= L / R = 3.5 mrad) with respect to the radial direction of the road.

  Here, when the leading wheel shaft 13f located at a distance a (= 1.25 m) from the center C2 of the carriage 12 is parallel to the carriage 11, the attack angle θ2 (= θ1 + a) with respect to the radial direction of the curved road. /R=4.0mrad) and run on a curved road. When the leading wheel axle 13f travels with an attack angle with respect to the curved road, a turning resistance force (lateral pressure) is generated on the outer gauge wheel 13f1.

In contrast, the two carriages of the vehicle, when fitted with an eddy current rail brake 14 described above, during traveling of the curved road as shown in FIG. 6, the eddy current rail brake 14a of the curve inside the control device When operated, a moment in the clockwise direction is generated in the leading carriage 12. FIG. 5 is a diagram showing the Shinkansen vehicle running on a straight road with the eddy current rail brake 14 attached thereto.

  If the longitudinal stiffness of the air spring is 173 N / mm, the braking force Fb required to turn the carriage 12 by the attack angle θ2 when passing through a curved road with a radius of 2500 m is 1.68 kN (= 173 × 4.0). ). This is a braking force that can be sufficiently generated by an eddy current rail brake.

  By the way, in an eddy current rail brake in which permanent magnets with a width of 118 mm and a height of 60 mm are arranged in a yoke with a total length of 1152 mm, a width of 118 mm and a height of 20 mm, and alternating magnetic poles, As shown in FIG. 7, a braking force of 3.6 to 6 kN can be generated. In addition, the result shown in FIG. 7 is a value when the gap between the permanent magnet and the rail is 10 mm.

  Therefore, by operating only the eddy current type rail brake located on the inner rail side, as shown in FIG. 6, the attack angle θ2 of the leading wheel shaft 13f can be set to 0 mrad, and the outer track of the leading wheel shaft 13f can be reduced. The lateral pressure acting on the side wheel 13f1 is greatly reduced.

  Thus, in the railway vehicle steering carriage of the present invention, the eddy current rail brake is used as a steering device, so that the posture of the carriage and the wheel shaft can be improved while passing through a curved road. In addition, even if a failure occurs, it is possible to minimize the deterioration of the wheel shaft posture as in a mechanical steering device. Further, since the necessary steering load is equal to or less than the load that can be secured as the eddy current rail brake as described above, it is not necessary to install a special eddy current rail brake.

  In the railcar steering bogie of the present invention, as an eddy current type rail brake that generates a braking force between the rail and the bogie frame, the wheel shaft and the vehicle body are not in contact with each other at the time of braking and non-braking. It is desirable to use it. If such an eddy current type rail brake is employed, even if the eddy current type rail brake breaks down, there is no adverse effect such as a deterioration in the attitude of the wheel shaft (an increase in the attack angle).

  In addition, when an eddy current type rail brake that switches between braking and non-braking by the rotation of the magnet unit 1 shown in FIGS. 1 and 2 is employed, the magnetic pole surface 1aa of the permanent magnet 1a and the top surface 2a of the rail 2 The magnetic path can be configured with the shortest length, and the magnetic efficiency can be increased. In addition, since the force required to switch from the braking state to the non-braking state is small, the size and weight can be reduced. Further, since the braking force can be adjusted by the rotation angle, there is an effect that the braking force can be easily adjusted.

  Needless to say, the present invention is not limited to the above-described examples, and the embodiments may be appropriately changed within the scope of the technical idea described in the claims.

  For example, although a permanent magnet has been described as an example of an eddy current rail brake, the present invention is not limited to this, and an electromagnet may be used. Moreover, not only a non-contact eddy current type rail brake but also a rail brake of a type using both an electromagnet type and a brake shoe can be used.

  Further, the railway vehicle of the present invention is not limited to the two carts that are the steering cart of the present invention. At least the front carriage in the traveling direction may be the steering carriage of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is an example of the eddy current type rail brake using the permanent magnet attached to the steering carriage for rail vehicles of this invention, and is the figure which showed the magnet unit which is a component, (a) is a whole perspective view, (b) is a cover. The figure which removed 1 and omitted one bracket, (c) is the front view which removed the cover. (A)-(d) is an example of the eddy current type rail brake using a permanent magnet attached to the railway vehicle steering carriage of the present invention, and switching from braking to non-braking using a two-pole permanent magnet. FIG. It is the figure which the Shinkansen vehicle which has not attached the eddy current type rail brake looked at from the upper side of the vehicle body which is drive | working a straight road. FIG. 4 is a view similar to FIG. 3 while passing through a curved road having a radius of 2500 m. FIG. 2 is a diagram of a Shinkansen vehicle with an eddy current rail brake mounted on a straight road, where (a) is a diagram viewed from the upper side of the vehicle body, and (b) is a diagram viewed from the side surface side of the vehicle body. FIG. 6 is a view similar to FIG. 5 while passing through a curved road having a radius of 2500 m. It is the figure which showed the result of having estimated the braking force by the electromagnetic field analysis about the eddy current type rail brake using a permanent magnet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnet unit 1a Permanent magnet 2 Rail 2a Top surface 11 Car body 12 Car 13 f Front wheel axle 14 Eddy current type rail brake 14a Eddy current type rail brake on the inner track side

Claims (5)

A railway vehicle steering carriage,
An eddy current type rail brake is provided at each position of the carriage frame facing the paired rails,
These eddy current rail brakes are configured so that they can be operated individually ,
A railcar steering bogie comprising a control device for controlling the bogie by steering only the eddy current rail brake located inside the curve when traveling on a curved road . The steering vehicle for a railway vehicle according to claim 1, wherein the eddy current rail brake uses a permanent magnet and is not in contact with the rail during braking and when not braking . The eddy current rail brake uses a magnet unit in which a plurality of permanent magnets are fixed to a ferromagnetic support plate so that at least adjacent magnetic poles are different , and this magnet unit is viewed from the cart side. The railway vehicle steering carriage according to claim 2 , wherein braking and non-braking are switched by rotating about an axis that coincides with the longitudinal direction of the rail . The railway bogie steering carriage according to claim 3 , further comprising a rotation angle adjusting mechanism for adjusting a braking force of the magnet unit . Railway car both you comprising the steering bogie according to any one of claims 1 to 4 in at least the traveling direction of the front bogie.

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