JPS5816451Y2 - Guide wheel support device for guided vehicles - Google Patents

Description

[Detailed description of the invention] This invention is based on a guided vehicle in which the guiding wheel is brought into contact with a guiding wall provided along the taxiway to guide the vehicle.
The present invention relates to an improvement of a guide wheel support device for a guided vehicle.

Conventionally, in guided vehicles that guided the vehicle by placing the guide wheels in contact with the guide wall, the guide wheels were attached to the lower part of the vehicle body, and the guide wheels were mounted on the axle with support arms that supported the wheels so that they could move up and down. Some have a support wheel at the bottom that runs on the road surface, while others have a guide wheel fixed to the axle.

However, when the guide wheels are attached to the car body, the height of the guide wheels changes greatly depending on the vertical movement or rolling of the car body, so it is difficult to determine the vertical height of the guide wall. It needs to be larger (
(Refer to Japanese Utility Model Application Publication No. 48-80211), and in the case where the support arm has a support wheel at the lower part, this support wheel is generally small in diameter and is easily affected by unevenness of the road surface, causing vertical vibration of the guide wheel support device. As the size increases, the structure becomes more complicated (refer to %Kokai No. 51-50119).Furthermore, when the guide wheel is firmly fixed to the axle, the axle support structure such as a leaf spring prevents the torsional rotation of the axle. As a result, the vertical vibration of the guide wheel support device is large, which poses a problem with the strength of the support, and it also has drawbacks such as lowering the durability and reliability of equipment on the support.

This invention eliminates the above-mentioned conventional drawbacks, and provides a guide wheel support device that reduces changes in the height of the guide wheel from the road surface and reduces vertical vibrations that occur in the vehicle's guide system.

An embodiment of this invention will be described below with reference to the drawings.

The guided vehicle 1 has running wheels 3, 3a at both ends of an axle 2.

In front of the axle 2, a transverse guide bar 5, which rotatably supports guide wheels 4, 4a at both ends, is supported on the axle 2 via a support arm 6.6a extending in the longitudinal direction.

The front end of the support arm 6.6a is connected to the guide bar 5 by a bin I having a vertical axis.

The rear end portion is connected to the front end portions of mounting members 8, 8a attached to the axle 2 by pins 9, 9a with vertical axes.

The mounting members 8, 8a are provided with forked portions 8A, 8B at the rear, as shown in FIG. ,11,1
Fit 0a and lla and tighten the horizontal bolt nut 12
, fix from 12A.

In this invention, a rubber bushing 13, which is an elastic body in the invention, is provided especially between the bolt 12 and the brackets 10, 11, 10a, 11a.

Note that 14 is a metal bushing provided on the inner circumference of the rubber bushing 13.

Further, due to the above structure, the mounting members 8 and 8a have a bifurcated shape when viewed from the side as shown in FIG. 2, and can be mounted to the brackets 10, 11, 10a and lla, respectively.

In addition, 14, 14a are left and right nuncle arms, which are connected to each other by a tie rod 15, and are connected to each other by a tie rod 15.
The front part of the wheel 3.3aL is connected to the support arm 6a by the iron 16, and the wheel 3.3aL is
A guide wall 18 provided in the guideway 17 so as to be steered
, 18a.

In this invention constructed as above, the guide wheel 4.4
a is attached to mounting members 8, 8a via a guide bar 5 and a support arm 6.6a, and these mounting members 8, 8a are elastically supported on the axle 2 by a rubber bunsh 13 (
・It will happen.

Therefore, the guide wheels 4, 4a, the guide bar 5, the support arm 6
6a, the large vibrations in the vertical direction acting on the axle 2 through the wheels 3, 3a are buffered, and the vertical amplitude of the guidance device is reduced.

To explain this further, the unsprung resonance curve including the axle 2 when the wheels 3, 3a are vibrated at various frequencies is shown in Figure 4.

This is the unsprung vibration characteristic that becomes the vibration source for the induction device, and has an unsprung resonance point at the point f3.

Next, since the relationship between the vibration source spring and the induction device is equivalent to the forced vibration of a general one-degree-of-freedom system (spring - mass - damping), the amplitude ratio of the induction device to the unsprung area is as shown in Figure 4. become that way.

For reference, the characteristics when a conventional guide wheel is not elastically supported on the axle are shown by broken lines.

In this case, the guidance device has a resonance point at f4.

The combination of Figure 4 A and Figure 4 Mouth becomes the amplitude of the guiding device, and a guiding device resonance curve as shown in Figure 4 is obtained.

As can be seen from FIG. 4C, if the resonant frequency f2 of the guiding device is made much lower than the unsprung resonant frequency by the rubber bunsh 13, the vertical amplitude of the guiding device becomes considerably small.

Since the magnitude of the vertical vibration acceleration of the guidance device is proportional to the product of the square of the frequency and the amplitude, the effect of reducing the vertical vibration acceleration is large in the rubber bunche 13 whose amplitude is small in the high frequency range.

If the damping effect of the elastic body itself is small, the amplitude at the resonance point of the guiding device becomes considerably large.

In that case, as shown in FIG. 2, the necessary damping effect can be obtained by using a damper 19 whose upper end is attached to the vehicle body and whose lower end is attached to the support 7-m.

On the other hand, if a small obstacle such as a piece of board falls on the taxiway 17 and the wheels 3 and 3a run over it, the frequency component of the impact force is relatively high (), so only the unsprung part It vibrates up and down, and the resonant frequency is low (・Shocks are not transmitted to the induction device (・).

As a result, vertical changes in the guidance device are also reduced, reducing the risk of derailment.

In the above embodiment, a guided vehicle that can travel on a taxiway is shown, but this invention can also be applied to a dual-mode vehicle that can travel on both general roads and taxiways.

As described above, this invention supports the support arm of the guide wheel on the wheel of the guide vehicle via an elastic body, thereby reducing the change in the vertical height of the guide wheel and reducing the vertical height of the guide wall. In addition, since the vertical vibration of the support arm is reduced, the required strength of the support arm, etc. is reduced, making it lighter in weight, increasing the reliability of the equipment on the guidance system, and reducing the amount of unevenness on the road surface. It is possible to drive even if

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the guide wheel support device for a guided vehicle of this invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a sectional view taken along the line ■-■ of Fig. 2. , Fig. 4 A and C are characteristic diagrams showing the amplitude ratio of the guidance device during unsprung vibration, the amplitude ratio of the guidance device with respect to the unsprung state, and the guidance device amplitude, respectively, with respect to the vibration frequency. 2... Axle, 4, 4a... Guide wheel, 6
, 6a... Support arm, 13... Rubber punch (elastic body), 17... Guideway, 18,
18a... Guidance wall, f2... Resonance frequency of guidance device, f3... Unsprung resonance frequency.

Claims (1)

[Scope of utility model registration request] In a guided vehicle that guides the vehicle by placing the guide wheels in contact with a guide wall provided along the guideway, a guide bar that rotatably supports the guide wheels at both ends is connected to the axle of the running wheels. The support arm of the guide wheel to be connected is supported at the connection part to the axle of the running wheel via elastic bodies provided at at least two upper and lower places, and the elastic body adjusts the resonance frequency of the guide wheel support device having the guide wheel by the spring. A guide wheel support device for a guided vehicle, characterized in that the frequency is lower than the lower resonance frequency.