JPH0254261B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a swing device, and particularly relates to a swing device having a characteristic that swing rigidity is large within a range where the swing angle is small and swing rigidity is small in a range exceeding a certain set angle. .

When a railway vehicle passes through a curved track, the bogie frame of the bogie turns relative to the car body around the pivot axis, and when turning, a rigid force is applied to the car body to stabilize it. It's summery.

In conventional vehicles, the rigidity force that resists turning is provided by a spring force such as a coil spring, and the spring characteristics have a first-order linear characteristic as shown by the broken line in Figure 1. There is a tendency that the larger the turning displacement, the larger the turning rigidity. Also,
Some conventional devices provide turning rigidity using combination springs, and their spring characteristics are as shown by the solid line in Figure 1.When turning at a small angle, the turning rigidity is small, and the turning angle from the reference position is small. It has a characteristic that the turning rigidity increases as the angle increases beyond a certain set angle.

By the way, recently, unlike normal railway vehicles,
New transportation systems in which vehicles run in concrete trenches are being planned.

Figure 2 shows an example of such a new transportation system, in which a bogie 3 runs in a concrete groove 1 with running tires 2, and the bogie 3 runs laterally within the groove 1. Guidance is performed by rolling along the side wall 6 of the groove 1 a guide wheel 5 provided at the tip of an arm 4 projecting left and right from the side of the truck.

In this type of vehicle, when the vehicle travels on a straight road, the turning rigidity is increased within a range where the turning angle from the reference position of the bogie is small to increase stability when traveling; When passing through a running route, it is desirable to reduce the turning rigidity of the bogie in order to facilitate maneuvering to quickly follow changes in the curve.

Such turning characteristics are required not only for the above-mentioned vehicles but also for automobile steering mechanisms and other turning mechanisms.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a swing device with a simple structure and reliable operation, which has a characteristic that the swing rigidity is high within a small range of swing angle from a reference position, and the swing rigidity is small in a range exceeding a set angle. It is about providing.

In order to achieve the above object, the present invention combines a rotating frame and a fixed frame so as to be able to rotate relative to each other around a rotating center, and at least one pair of different polarities is provided between the rotating frame and the fixed frame. While incorporating a magnet piece,
The present invention is characterized in that a spring torque transmission arm is provided protruding from at least one side of the rotating frame, and spring-loaded resistance applying devices are arranged on both sides of this arm.

An embodiment of the swing device according to the present invention will be described below with reference to FIG.

FIG. 3 shows an example in which the turning device according to the present invention is applied between the vehicle body frame 10 and the bogie frame 11. A bogie frame 11 as a turning frame is incorporated into a vehicle body frame 10 as a fixed frame, and the bogie frame 11 is centered around the turning center O.
It is designed to be able to rotate around the center. An axle is mounted on this bogie frame 11 as in FIG. 2, and running wheels are provided at the ends of the axle (not shown). Further, the bogie frame 11 has a turning ring 12.
is fixed, and the center of this turning ring 12 coincides with the turning center O. It is preferable that the vehicle body frame 10 and the bogie frame 11 are combined at this turning ring 12 so as to be able to turn.

Two magnet pieces 1 are placed on the outer peripheral surface of the turning ring 12.
4, 14 are fixed, and these magnet pieces 14, 14
are provided at opposing positions on a diametrical line passing through the center of the turning ring 12, and have the same polarity, for example, north pole.

On the other hand, the magnet pieces 14,
Magnet pieces 15, 15 of opposite polarity to 14 are attached. Therefore, when the axis of the axle is at the reference position or neutral position perpendicular to the direction of travel, the set of magnet pieces 14 and 15 attracts each other, and the vehicle body frame 10 and the bogie frame 11 maintain a stable straight traveling state. Retained. When the bogie frame 11 tries to turn around the turning center O by a small angle from the reference position, the magnetic attraction force of the magnet pieces 14 and 15 tries to restore the bogie frame 11 and acts as a large turning resistance. Note that the magnet pieces 14 and 15 may be permanent magnets or electromagnets.

On the other hand, a pair of spring torque transmission arms 16, 16 are provided protruding from both sides of the bogie frame 11.
The spring torque transmission arms 16, 16 are provided on a line that is perpendicular to a line passing through the centers of the magnet pieces 14, 15 and passes through the center of rotation O. A resistance applying device 17 is installed on both sides of each torque transmission arm 16. Each resistance imparting device 17 is
It consists of a spring receiving box 18 fixed to the side of the vehicle body frame 10, a coil spring 19 housed in this box, and a presser 20 that receives the spring force of this spring 19 on its back surface.

The spring constant of the coil spring 19 is such that the turning rigidity of the bogie frame 1 is smaller than the turning rigidity given to the bogie frame 11 by the magnetic attraction force of the magnet pieces 14 and 15.
It is important to set it to a value such as that given by 1.

Since the present invention is configured in this manner, when the bogie frame 11 turns, for example, in the counterclockwise direction in the figure around the turning center O, the magnetism by the magnet pieces 14 and 15 is reduced within a range where the turning angle from the reference position is small. The bogie frame 11 receives the suction force, and a large turning rigidity acts on the bogie frame 11. When the truck frame 11 further rotates counterclockwise around the rotation center O, it is no longer under the influence of the magnetic attraction force, and the spring torque transmission arms 16, 16 are now moved to the pushers 2 of the resistance applying devices 17, 17.
0 and 20, respectively, against the spring force of the coil spring 19. The force of these coil springs 19, 19 pushing the spring torque transmission arms 16, 16 via the pushers 20, 20 acts on the bogie frame 11 as turning rigidity. The resistance force F [Kg] due to the spring is expressed as F=k, where k is the spring constant and 〓 is the amount of deflection. This force F becomes a reaction torque that rotates the bogie frame 11 around the turning center C.

The relationship between the turning angle and the turning rigidity in a device configured in this way is as shown in Fig. 5, and when the turning angle from the reference position is within the range of a small setting angle θ ₀ , a large turning is achieved due to the magnetic attraction force. While the bogie frame 11 receives rigidity, the bogie frame 11 receives a small turning rigidity due to the spring force of the resistance applying devices 17, 17 in a range exceeding the set angle θ ₀ .

In the above embodiment, a pair of spring torque transmission arms 16, 16 are provided to the bogie frame 11, but the present invention is not limited to this, and the number of spring torque transmission arms 16 may be one, and the mounting position relative to the bogie frame 11 may be freely selected. It's watery.

As is clear from the above description, according to the present invention, magnet pieces with different polarities are incorporated between the rotating frame and the fixed frame, and a spring torque transmission arm is provided protruding from the rotating frame, so that Since the spring-loaded pusher acts on this spring torque transmission arm within this range, the magnetic attraction force of the magnet pieces acts on the rotating frame as a large swing rigidity within the range of minute setting angles from the reference position. On the other hand, within a range exceeding the minute setting angle, the spring force of the coil spring of the resistance applying device can provide a small turning rigidity to the rotating frame, and desired turning rigidity characteristics can be obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the characteristics of turning displacement and turning rigidity of a conventional turning device, FIG. 2 is a plan view showing an example of a cart suitable for applying the present invention, and FIG.
The figure is a plan view showing an embodiment of the swing device according to the present invention, FIG. 4 is a plan view showing the state in which the swing frame is turned around the center of rotation, and FIG. It is a diagram showing characteristics. 10... Fixed frame (vehicle body frame), 11... Rotating frame (bogie frame), O... Turning center, 14, 15... Magnet piece, 16... Spring torque transmission arm, 17... Resistance imparting device, 18 ...Spring box, 19...Coil spring, 20...Press element.

Claims (1)

[Claims] 1. A rotating frame and a fixed frame are combined so as to be able to rotate relative to each other around the center of rotation, and at least one set of magnet pieces having different polarities is incorporated between the rotating frame and the fixed frame. A swinging device, characterized in that a spring torque transmission arm is provided protruding from at least one side of the swinging frame, and spring-loaded resistance applying devices are arranged on both sides of the arm. 2. The turning device according to claim 1, wherein the two sets of magnet pieces having different polarities are arranged at opposing positions on a diametrical line passing through the turning center. 3. The rotating device according to claim 1, wherein the set of magnet pieces having different polarities is constituted by a permanent magnet. 4. The rotating device according to claim 1, wherein the set of magnet pieces having different polarities is constituted by an electromagnet. 5. A pair of the spring torque transmission arms are provided on a line passing through the center of rotation and perpendicular to a line passing through the center of the set of magnet pieces, and a spring-loaded resistance applying device is arranged on both sides of each spring torque transmission arm. A turning device according to claim 1, characterized in that a turning device is provided. 6 The resistance imparting device includes a spring receiving box fixed to the fixed frame side, a coil spring housed in the spring receiving box, and a coil spring that is attached to the tip of the coil spring and protrudes toward the spring torque transmission arm. The turning device according to claim 1, characterized in that the turning device comprises a pusher.