JPS6092155A - Turning gear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

When the railway vehicle passes through the crystal line track, the underframes of the five bogies rotate relative to the car body around the axis.

In order to maintain the stability of the electric body, a rigid force that resists rotation is applied to the X-'s music.

In conventional vehicles, the stiffness force that resists turning is .

It is given by the spring force of a coil spring, etc., and its spring characteristics have first-order linear characteristics as shown by the broken line in Figure 1, and the larger the turning displacement, the larger the turning rigidity tends to be. . In addition, some conventional devices provide turning rigidity with combination springs, and their spring characteristics are as shown by the solid line in Figure 1, where the turning rigidity is small when turning at a minute angle, 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.

Incidentally, in recent years, new transportation systems in which vehicles run in concrete grooves, unlike ordinary railway vehicles, have been 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 lateral movement guidance of this bogie 3 within the groove 1 is as follows. This is done by rolling a guide wheel 5 provided at the tip of an arm 4 projecting left and right from the side of the truck along the side wall 6 of the groove 1.

In this type of vehicle, when the vehicle is running 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 the stability when running. 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 curves.

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

Therefore, one object of the present invention is to provide a swing device that has a simple structure and reliable operation, and 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 that exceeds a set angle. It is about providing.

In order to achieve the above object, one turning device according to the present invention includes:
A rotating frame and a fixed frame are combined so that they can rotate relative to each other around the center of rotation, and a cam plate having a notch at approximately the center of the cam surface is fixed on the rotating frame, and a first torque is applied to the fixed frame side. One end of the transmission arm is pivotally supported, and the free end of the torque transmission arm is engaged with the notch of the cam plate while the rotating frame is rotated by a minute set angle from the reference position, and the free end of the torque transmission arm is locked on both sides of the first torque transmission arm. While a large resistance applying device is provided, a second torque transmitting arm is provided protruding from the above-mentioned rotating frame, and a small resistance applying device is arranged on both sides of this second torque transmitting arm, and a small resistance applying device is provided within a minute setting angle from a reference position. This is characterized in that a large turning rigidity is applied to the turning frame, and a small turning resistance is applied within a range exceeding this set angle.

Embodiments of the swing device according to the present invention will be described below with reference to FIGS. 3 to 9.

FIG. 3 shows a rotating device according to the present invention with a car body frame 10 and a bogie frame 1.
An example of application between 1 and 1 is shown. A bogie 11 as a rotating frame is incorporated into a vehicle body frame 10 as a fixed frame,
The bogie frame 11 is capable of turning around a turning center 0. Ti hand tires 14, 14 are attached to both sides of the shaft 12 on which m1h12 slides on the bogie frame 11. Further, the bogie frame 11 has a turning ring 15.
Even if it is fixed, the center of this turning ring 15 coincides with the turning center 0. At the turning wheel 15, the vehicle body frame 10 and the bogie frame 11 are combined so as to be able to turn.

Further, a cam plate 16 is fixed to one side of the bogie frame 11, and this cam plate 16 has a cam surface 17 that is a part of a circular arc with the center of curvature at the turning center O. A small arc-shaped notch 18 is formed.

This notch 18 is on a center line that is perpendicular to the axis of the axle 12 when the vehicle is moving straight and passes through the turning center O. This notch 1BK.

A row 220a at the free end of the first torque transmitting arm 20, which is pivotally attached to the vehicle body frame 10 via the pivot shaft 19, is engaged. Also, large resistance applying devices 21 are arranged symmetrically on both sides of the torque transmitting arm 4 in the middle. Each large resistance imparting device 21 includes a spring receiving box 22 fixed to the side of the vehicle body frame 10, a large coil spring n with a large spring constant housed in this box, and a compression force that receives the spring force of this spring prisoner on the back surface. On the other hand, on the opposite side of the bogie frame 11, a second torque transmitting arm muscle is protruded. Small resistance applying devices 26 are arranged symmetrically on both sides of the torque transmitting arm 5 in the middle. Each small resistance applying device 26 includes a spring receiving box 27 fixed to the side of the vehicle body frame 10, a coil spring with a small spring constant housed in this box, and a suppressor 29 that receives the spring force of this spring on the back side. It consists of

Since the present invention is configured in this way, when the bogie frame 11 turns around the turning center 0, the large spring force of the coil spring field generates a large turning rigidity within a range where the turning angle from the reference position is small. let On the other hand, when a certain set angle is exceeded, the bogie frame 11 is released from the influence of the coil spring, and the small spring force due to the coil spring now acts on the bogie frame 11 as a small turning rigidity.

That is, in FIG. 4, it is assumed that the truck frame 11 rotates clockwise in the figure by a minute angle θ about the rotation center O. During this time, the engagement state between the notch 18 of the cam plate 16 and the roller 20a at the free end of the torque transmission arm 4 is maintained, and the torque transmission arm 2
0 rotates counterclockwise around the pivot shaft 19, and during this time the coil spring 230 receives resistance or stiffness due to a large spring force. Then, as shown in FIG. 5(b), the bogie frame 1
1, that is, the set angle θ at which the cam plate 16 is located. When the torque transmitting arm 20 has been rotated by a certain amount, the row 220a at the free end of the torque transmitting arm 20 is no longer engaged with the notch 18 of the cam plate, and the spring force of the coil spring 23 no longer exerts any influence on the bogie frame 11. And the above set angle θ. After this point, a small spring force by the coil spring acts on the second torque transmitting arm 25, so a small turning stiffness is generated on the bogie frame 11. As shown in FIG. 5(e), when the bogie frame 11 rotates by the maximum turning angle θmax, the free end 20a of the torque transmission arm 20 moves toward the cam surface 17.
will reach the end of.

The relationship between the turning angle displacement and turning rigidity in the device configured in this way is as shown in Fig. 6, and the reference position -
The turning rigidity is large within the setting range where the turning angle from σ is small. Outside the range exceeding , the characteristic of low turning rigidity is obtained.

Next, another embodiment of the swing device according to the present invention will be described with reference to FIGS. 7 to 9.

The embodiment shown in FIG. 7 is an example in which the turning rigidity is changed by combining one type of spring and a lever arm instead of using two types of coil springs with different spring constants. be.

That is, the torque transmission arm 30 is made in the form of a lever. The torque transmission arm 30 is supported at its middle by a fulcrum 31 on the side of the vehicle body frame 10, and a row 232 at one end is connected to the cam plate 1.
6, and a restoring spring 33 is stretched between the opposite end and the vehicle body frame 10.

According to this embodiment, the bogie frame 11 has a small set angle θ with respect to the turning center 0. When the roller 32 rotates by 1, the roller 32 is held within the notch 18 of the cam plate 16, and the spring force of the restoring spring 33 at this time is large.

However, as shown in FIG. 8, the set angle θ.

When the torque transmission arm 30 exceeds the cam plate 1, the roller 32 of the torque transmission arm 30
The puller comes out from the notch 18 of 6 and rides on the cam surface 17. Then, the torque transmission arm 30 tilts clockwise in the figure about the fulcrum 31, extending the restoring spring 33 and changing the spring constant to a smaller value. As a result, the turning setting angle θ. The turning stiffness decreases in the region beyond .

FIG. 9 shows still another embodiment of the present invention, in which the cam surface 17 of the cam 16 is arranged such that the cam radius R(θ) gradually increases according to the rotation angle θ from the reference position. It is configured. Therefore, the restoring spring 33
The torque transmission arm 30 moves according to the cam radius R(θ) and generates a restoring force. The cam radius R(θ) changes depending on the rotation angle θ, but the rate of change is 0≦
I≦θ. In the range of , the increase rate m1. θ. In the range of ≦θ, the desired broken line characteristic can be obtained by setting the increase rate to m.

As is clear from the above description, according to the present invention, a cam plate whose pivot center is aligned with the pivot frame is provided.

Engage the torque transmission arm with the notch in the cam surface of this cam plate,
A spring is applied to the other end of the torque transmission arm, and the spring force of this spring is changed depending on the amount of rotation of the cam plate, so it is possible to increase the turning rigidity within a small turning angle range, and when the turning angle exceeds the set angle. In this range, it is possible to provide characteristics that reduce turning rigidity. Furthermore, by changing the cam curve of the cam surface, the rigidity characteristics associated with turning can also be changed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the turning displacement-turning rigidity characteristics of a conventional turning device, FIG. 2 is a plan view showing an example of a cart suitable for applying the present invention, and the third section is a diagram showing the turning rigidity characteristics of a conventional turning device. FIG. 4 is a plan view showing an embodiment of the turning device; FIG. 4 is a plan view showing a state in which the bogie frame is turned by a small angle;
)(C) is an explanatory diagram showing the state of movement of the cam plate and the movement of the torque transmission arm, FIG. 6 is a diagram showing the turning displacement-turning rigidity characteristics according to the present invention, and FIG. FIG. 8 is a plan view showing a state in which the bogie frame is turned by a minute turning angle, and FIG. 9 is a plan view showing another modification of the cam plate. . DESCRIPTION OF SYMBOLS 10... Vehicle body frame, 11... Bogie frame, 0... Turning center, 16... Cam plate, 17... Cam surface, 18...
Notch, 20... Torque transmission arm. Applicant's agent: Inomata Kiyomi 1st title 2nd title 3rd title 4th title

Claims (1)

[Claims] 1. A rotating frame and a fixed frame are combined so as to rotate relative to each other around the center of rotation, and a cam plate having a notch at approximately the center of the cam surface is fixed on the rotating frame, and 1st on the fixed frame side
one end of the torque transmission arm of the first torque transmission arm is pivotally supported, and the free end of the torque transmission arm is locked in the notch of the cam plate while the rotating frame rotates by a minute set angle from the reference position, and both sides of the first torque transmission arm are A large resistance imparting device is installed on the swivel frame, while a second
A torque transmitting arm is provided protruding from the second torque transmitting arm, and a small resistance imparting device is arranged on both sides of this second torque transmitting arm, and a large swinging rigidity is applied to the swinging frame within a minute setting angle from the reference position, and a large swinging rigidity is applied to the swinging frame within a minute setting angle from the reference position. A turning device characterized in that a small turning rigidity is applied within a range in which the turning stiffness is small. It is characterized by consisting of a spring receiver box, a coil spring with a large spring constant housed in the spring receiver box, and a presser attached to the tip of the coil spring and protruding toward the first torque transmission arm. A turning device according to claim 1. 3. The above-mentioned small resistance imparting device consists of a spring receiver fixed to the fixed frame side, a coil spring with a small spring constant housed in the spring receiver, and a second torque transmitting arm attached to the tip of the coil spring. 2. The swing device according to claim 1, further comprising a pusher protruding toward.