JPH0333545B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vibration suppression device that suppresses natural pendulum motion of a rail output having a pendulum mechanism.

[Prior Art and Problems] As shown in FIG. 5, the structure of a track vehicle with a pendulum mechanism is such that a bogie 5 is mounted on a wheel axle 3 having a pair of wheels running on a rail 1 via a shock absorber 4. is mounted on the roller 6 installed on the top surface of the trolley 5.
A vehicle body 7 having an arc-shaped outer bottom surface is mounted on the vehicle body 7 .

When the vehicle travels on a track that curves to the right in FIG. 5, the center of gravity 9 of the vehicle body 7, which is located below the pendulum center 8 of the vehicle body 7, is displaced to the left by centrifugal force, causing the vehicle body 7 to tilt. .

The centrifugal force felt by the vehicle body, that is, by the passengers, is reduced by the component of gravity due to this tilt angle as the vehicle body 7 is tilted at the center of the pendulum.

Therefore, the permissible running speed of the vehicle on a curved track can be increased.

On the other hand, the pendulum structure that causes the vehicle to tilt has the following drawbacks.

That is, even when a large number of passengers board the vehicle at once while the vehicle is stopped, the vehicle body 7 easily swings from side to side, creating a pendulum motion that causes discomfort to the passengers.

Therefore, a method has been adopted in which the vehicle is allowed to tilt freely while the vehicle is running, while preventing the vehicle from tilting and the accompanying vibrations when the vehicle is stopped or other times as necessary.

In FIGS. 6 and 7, reference numeral 10 denotes a pair of fluid cylinders disposed opposite to each other below the vehicle body 7. In this embodiment, an air cylinder is used. A shaped piece 11 is provided protrudingly.

Therefore, when the piston 10a of the air cylinder 10 is shortened, the vehicle body 7 can be tilted freely.
Further, when the piston 10a is extended and the protruding piece 11 is clamped, the vehicle body 7 is forcibly fixed to the truck 5.

That is, there are cases in which the vehicle body 7 is allowed to tilt completely freely and cases in which the tilting of the vehicle body 7 is forcibly prevented, and one of these two is selected as appropriate.

However, when the vehicle runs with the vehicle body 7 freely allowed to tilt, even if a slight external force such as wind is applied to the vehicle, a pendulum motion occurs in the vehicle body 7, and the vehicle body 7 naturally damps due to the restoring motion. The train continued to sway from side to side for a while, causing motion sickness to the passengers.

Therefore, while allowing the vehicle body 7 to tilt freely,
What is desired is a device that can quickly stop vibrations and, if necessary, prevent the vehicle from tilting at all.

However, a device that uses a spring is generally considered as a pendulum vibration control device, but there is no space to install it in the cramped cart, it requires many parts, and the damping force cannot be adjusted freely. There are no drawbacks.

The present invention has both the function of quickly converging the pendulum motion while allowing the vehicle body to tilt, and the function of completely preventing the vehicle body from tilting, and not only can both functions be easily selected as needed, but the structure is To provide a pendulum vibration damping device for a vehicle that is simple and requires an extremely small space for installing the device.

[Technical means to solve problems]

The present invention provides a protruding piece on either one of a bogie for suspending a wheel axle and a car body having an arcuate outer bottom surface and mounted on the bogie via rollers, and the protruding piece on the other side. A pendulum vibration damping device includes a pair of fluid cylinders arranged on both sides of the vehicle body, and controls the relative motion between the vehicle body and the bogie by sandwiching the projecting piece between the fluid cylinders. a first pressure regulating valve that adjusts the pressure in the fluid cylinder to a pressure that quickly converges the pendulum motion while allowing relative movement between the vehicle body and the bogie, and a pressure that controls the internal pressure of the fluid cylinder to a pressure that forcibly stops the relative pendulum motion between the vehicle body and the bogie. a second pressure regulating valve to be adjusted, the first pressure regulating valve and the second pressure regulating valve;
The present invention is characterized in that a fluid circuit is provided that includes a switching valve that selectively communicates one of the adjusted pressures of the pressure regulating valve with the fluid cylinder.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

Note that the same parts as in the conventional example are given the same reference numerals.

In the following embodiments, air is selected as a commonly used pressure fluid, but other fluids can also be used.

Example In FIG. 1, 12 indicates an air reservoir, for example
It is filled with pressurized air of 10Kg/ ^mm2 , and air reservoir 1
2 is connected to two first pressure regulating valves 15 and one second pressure regulating valve 16 via a check valve 14 which is conventionally provided as a safety device.

The output side of the two first pressure regulating valves 15 is connected to the pipe line 17
The second pressure regulating valve 16 is directly connected to one of the two dual-type switching valves 18 through the pipe line 19, the switching valve 20, and the pipe line 19a.
Connect to the other side.

The delivery side of the dual switching valve 18 is connected via a conduit 21 to an air cylinder 10 that is disposed opposite to the protruding piece 11 so as to sandwich the protruding piece 11 therebetween.

Two pairs of vibration suppressing devices each consisting of a pair of air cylinders 10 and a protruding piece 11 are provided for each vehicle, one for the front bogie and the other for the rear bogie.

As shown in FIG. 4, the structure of the dual-way switching valve 18 is such that an air chamber is connected to a first air chamber 18b on the right side that communicates with the pipe line 17 by a slidable valve 18a inside.
and a second air chamber 18 on the left side communicating with the pipe line 19a.
It is divided into c.

In addition, there is a port 18 communicating with the pipe line 21 at the lower center.
d is provided.

Whichever of the left and right air chambers 18b, 18c has a higher pressure presses the valve 18a, communicates with the port 18d, and supplies pressurized air to the air cylinder 10 through the conduit 21.

When the switching valve 20 is open, the regulated pressure of the second pressure regulating valve 16 is supplied to the duplex switching valve 18 via the conduit 19a, and when it is closed, the supply of the pressure of the second pressure regulating valve 16 is cut off. At the same time, the pressure air in the pipe line 19a is released into the atmosphere and becomes atmospheric pressure.

The pendulum vibration damping device of this embodiment configured as described above has pressure air (for example, 10 kg/mm ² ) in the air reservoir 12.
passes through the check valve 14 to the first pressure regulating valve 15 (adjusted pressure is, for example, 1 Kg/mm ² ) and the second pressure regulating valve 1.
6 (adjusted pressure is, for example, 5 kg/mm ² ), so when the switching valve 20 is opened, the adjusted pressure of the second pressure regulating valve 16 is supplied to the valve 18a of the dual switching valve 18.
is supplied to the air cylinder 10 from the port 18d, and as the piston 10a expands, the protruding piece 11
to hold.

The clamping force of the protruding piece 11 of the piston 10a that receives the adjustment pressure of the second pressure adjustment valve 16 is large, and is set to restrain the pendulum movement of the vehicle body 7 in any state, and acts as a pendulum restraint device. .

When the switching valve 20 is closed, the pressure in the pipe line 19a becomes atmospheric, so that the adjusted pressure of the first regulating valve 15 is supplied to the cylinder 10 via the dual switching valve 18.

The clamping force of the piston 10a that receives the adjustment pressure of the first pressure adjustment valve 15 is sufficient to allow the pendulum motion of the vehicle body 7 and to quickly converge the pendulum vibration, so that the vehicle body 7 will not be tilted due to external force. Even if the pendulum movement does occur, the pendulum movement will stop early and the passengers will not experience seasickness.

FIG. 3 is a diagram showing the relationship between the pendulum angle θ of the vehicle body and the damping force F of the damping device.

Now, the first pressure regulating valve 15 is attached to the air cylinder 10.
If the vehicle body 7 makes a pendulum motion when the adjusted pressure is supplied, the pressure of the pressurized air increases as shown by the broken line in FIG.

This state occurs when the first pressure regulating valve 15 does not have the exhaust function for the increased pressure, and has the advantage that the damping force increases in proportion to the pendulum angle.

On the other hand, as shown by the solid line in FIG. 3, a device with an exhaust function has the advantage of maintaining a constant damping force depending on the pendulum angle, and any one of these can be selected as appropriate.

Furthermore, since the air pressure inside the air cylinder 10 can be regulated by the first pressure regulating valve 15 or the second pressure regulating valve 16, the damping effect can be finely adjusted in response to various conditions. It goes without saying that it can be done.

Embodiment FIG. 2 shows another embodiment, in which the second pressure regulating valve 16 and the switching valve 20a are replaced by the first pressure regulating valve 1.
This embodiment differs from the embodiment shown in FIG. 1 in that it is placed in front of 5.

That is, when the switching valve 20a is switched to one side, the regulated pressure of the second pressure regulating valve 16 is communicated with the conduit 22, and the pressure in the conduit 23 is set to atmospheric pressure,
When the switching valve 20a is switched to the other side, the adjusted pressure of the second pressure regulating valve 16 is transmitted to the pipe line 23.

The structure and operation of the dual-function switching valve 18 and the air cylinder 10 as a vibration suppressor are the same as in the embodiment.

〔effect〕

The present invention has the following effects.

(a) If the clamping force of the vibration suppression device is used as the adjustment pressure of the first pressure regulating valve, the vehicle body can tilt, but the pendulum vibration converges early, so the vehicle body repeatedly oscillates as before. This eliminates the harmful effects of seasickness on passengers, etc., and improves the riding comfort for passengers.

It also has the function of forcibly suppressing the tilting of the vehicle body.

(b) Since the vibration motion of the vehicle body can be damped and suppressed by the same device, the structure of the device is simple, which not only reduces manufacturing costs and eases maintenance, but also reduces installation space. There are advantages to doing so.

(c) Compared to the case where a spring is used as a damping device for the pendulum vibration of the vehicle body, the vibration damping effect can be finely adjusted in response to various conditions by adjusting the fluid pressure.

[Brief explanation of the drawing]

Figures 1 and 2 are equipment and pneumatic circuit diagrams that make up this device, Figure 3 is a diagram showing the relationship between the pendulum angle and damping force, Figure 4 is an explanatory diagram of the structure of the dual switching valve, and Figure 5 is a diagram showing the relationship between the pendulum angle and damping force. The figure is a schematic explanatory diagram of the vehicle, and FIGS. 6 and 7 are layout diagrams of the vibration suppressing device. 5...Dolly, 7...Car body, 8...Pendulum center, 9
...Center of gravity of the vehicle body, 10...Air cylinder, 11...
... Projection piece, 12 ... Air reservoir, 14 ... Check valve, 1
5...First pressure regulating valve, 16...Second pressure regulating valve, 18...Double switching valve, 20...Switching valve.

Claims (1)

[Claims] 1. A protruding piece is provided on either one of the bogie on which the wheel axle is suspended and a car body having an arcuate outer bottom surface and mounted on the bogie via rollers, and a protruding piece is provided on the other side on both sides of the protruding piece. a pair of fluid cylinders arranged;
In a pendulum control device that controls relative motion between the vehicle body and the bogie by holding the protruding piece between the fluid cylinders, the pressure inside the fluid cylinder is adjusted to allow the relative motion between the vehicle body and the bogie while quickly controlling the pendulum motion. a first pressure regulating valve that adjusts the pressure within the fluid cylinder to a pressure that forcibly stops the relative pendulum motion between the car body and the bogie; and the first pressure regulating valve A pendulum vibration damping device for a vehicle, comprising a fluid circuit including a valve and a switching valve that selectively communicates one of the adjusted pressures of the second pressure regulating valve with the fluid cylinder.