JPS584660B2 - steering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering device for a vehicle that runs on a dedicated track that has guide walls on its sides.

This type of track transportation system has a guide wall on the side of the track, and a pair of guide shafts movable in the left and right directions on the car body side. This is a system that guides the vehicle along the track by rolling the guide wheels into pressure contact with the guide wall.The branching methods can be roughly divided into the on-board branching method and the ground branching method. There are two types.

The on-vehicle branching method is a method in which a branching device is installed on the vehicle and the route is selected on the vehicle side.In this case, one-sided guidance is used in which the guide wheel is pressed against the guide wall on one side, and the ground branching method is This is a system in which a branching device is provided on the ground side and the route of the vehicle is switched on the ground side, and in this case, both left and right guide wheels are brought into pressure contact with each guide wall.

The ground branching system is generally considered to be suitable for connecting trains with long distances between cars on shuttle-shaped or loop-shaped main tracks with few branching sections.

For example, lines other than the main line, such as lines at vehicle depots, have a willow line shape with many branching parts due to their purpose, and therefore require many ground branching devices, making the track complex and expensive.

In general, track costs account for 50 to 70% of the construction cost of a track transportation system, so one way to reduce construction costs is to make the track a simple structure without branching devices. .

In view of such problems, the present invention has a structure in which the steering device of the vehicle can be mutually switched between on-board branching and landowner branching. This is intended to reduce construction costs by providing on-vehicle branching/unilateral guidance in areas with a large number of branching points, such as in vehicle depots. a pair of front and rear guide shafts that can be mounted, guide wheels that are attached to both ends of the guide shafts so as to protrude from the side surfaces of the vehicle body and roll in contact with the guide walls, and the amount of movement of the guide shafts. In addition to providing a one-sided guide mechanism that selectively presses the guide wheel against either the left or right guide wall, the steering device has a link mechanism that transmits the information to the tie rod and steers the wheels. The point is that a switching and holding mechanism is provided to release the pressing force.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In the figures and FIG. 2, reference numeral 1 denotes a track, which has guide walls 2 on its sides.

Reference numeral 3 denotes a vehicle body, which is provided with axles 4 at the front and rear, and wheels 6 are supported at both ends of each axle 4 so as to be freely steerable around a king pin 5.

Each pair of left and right wheels 6 are interlocked and connected by a knuckle arm 7 and a tie rod 8, and one of the knuckle arms 7 is connected to the rear end of a steering arm 12 via a rod 9, a forward/reverse switching device 10, and a rod 11. be done.

The forward/reverse switching device 10 is swingably supported by a mounting base 13 of the axle 4, and the steering arm 12 is swingably supported by a pin 14 perpendicular to the axis of the axle 4.

Reference numeral 15 denotes guide shafts, which are disposed at the bottom of both the front and rear ends of the vehicle body 30, and are supported by the axle 4 via guide shaft support rods 16 so as to be movable in the left and right direction. A guide wheel 17 is attached to each of the guide wheels 17 so as to protrude from the lateral side of the guide wall 2 and roll in contact with the guide wall 2.

Note that the front end of the steering arm 12 is connected to the guide shaft 15 via a link 18.

A swinging arm 19 is swingably supported by a pin 14, and a branch cylinder 20 is interposed between the free end of the swinging arm 19 and the front end of the steering arm 12. The branch cylinder 20 is for selection of lateral guidance and is controlled by a solenoid valve 21.

Reference numeral 22 is a coil spring for pressing each guide ring 17 against either the left or right guide wall 2, and is attached to the switching holding cylinder 23 by being fitted onto the switching holding cylinder 23.

As shown in FIG. 3, the switching holding cylinder 23 is composed of a seven-cylinder main body 24, a piston 25 inserted and supported therein, a piston rod 26, etc., and the ends of the cylinder main body 24 and piston rod 26 are connected to a swing arm. The cylinder body 24 and the piston rod 26 are each provided with a receiving plate 2728 for receiving the coil spring 22.

29 is a solenoid valve that controls the switching holding cylinder 23; 30 is a locking device that locks the switching holding cylinder 23 in a contracted state; it has a locking pin 32 that can be freely engaged with an engaging portion 31 at the tip of the piston rod 26;

33 is a limit switch that detects contraction of the switching holding cylinder 23.

Next, the effect will be explained.

FIGS. 1 and 2 show the case of one-sided guidance, in which case there is a branching function (the branching cylinder is freely retractable) on the upper side of the vehicle, which corresponds to an on-vehicle branching.

For example, during left-side guidance and forward travel, the branch cylinder 20 is held in a contracted state, and the connection point between the switching holding cylinder 23 and the branch cylinder 20 with respect to the swing arm 19 is A.
Located at 1.

At this time, since the coil spring 22 is assembled and installed in a compressed state, the steering arm 12 is rotated counterclockwise around the pin 14 (
As a result, the guide shaft 15 connected to the steering arm 12 via the rod 18 moves in the direction shown by the b arrow, and the guide ring 17 at its tip moves toward the left guide wall 2.
It presses against and rolls.

On the other hand, the moment of the steering arm 12 is transmitted to the wheels 6 via the rod 11, the forward/reverse switching device 10, the rod 9, the knuckle arm 7, the tie rod 8, etc. Make a steering operation in the direction shown by the arrow.

Next, when a branch command to the right guide is given, the solenoid valve 21
The port position of is switched from B1 to B2, the branch cylinder 20 is extended, the swing arm 12 is rotated in the clockwise (d arrow) direction, and the junction point between the branch cylinder 20 and the switching holding cylinder 23 is A1. Move from to A2.

In this case, the moment of the steering arm 12 acting around the pin 14 by the coil spring 22 is clockwise,
Therefore, the guide wheel 17 rolls into pressure contact with the right guide wall 2, and the wheel 6 is steered clockwise around the king pin 5.

FIG. 4 shows the case of both side guidance.

In this case, on both sides of track 1, there are
Branch walls 34 and 35 shown in 0 are provided, and the guide wheels 17 of the vehicle are fitted and guided between the branch wall 34 and the guide wall 2 on the branch direction side, and correspond to ground branching. It is something to do.

If a switching command is given from the left side guide to the both side guide, the port position of the solenoid valve 21 will be switched from B1 to B0, and at the same time the port position of the switching holding cylinder control solenoid valve 29 shown in FIG. 3 will be changed to C. It switches from to C0.

As a result, the branch cylinder 20 becomes a free state (no pressure is applied), pressure acts on the switching holding cylinder 23, and this switching holding cylinder 23 contracts against the coil spring 22, so that the swing arm 19 moves to A1. Rotate clockwise from to A0.

Then, the switching holding cylinder 23 contracts, and the swinging arm 19
When the piston rod rotates to A0, the limit switch 33 provided in the switching holding cylinder 23 detects this as shown in FIG. 31, and the switching holding cylinder 23 is locked.

On the other hand, after confirming the extension of the lock pin 32 of the lock device 30, the port position of the solenoid valve 29 is switched from C0 to C again.
This completes the switch to the bilateral guidance and steering system.

Note that it is appropriate to use hydraulic pressure or pneumatic pressure for expanding and contracting the branch cylinder 20 and the switching holding cylinder 23, and it is appropriate to use electricity or pneumatic pressure for expanding and contracting the locking device 30.

As described above in detail in the embodiments, the present invention is provided with a one-sided guide mechanism that selectively presses the guide wheel to the left and right, and a switching holding mechanism that releases the pressing force caused by this.
Mutual switching between on-board branching and above-ground branching is now possible on the vehicle side. Therefore, even if the above-ground branching method is adopted on the main line, in places with many branching points, such as inside a rolling stock depot, the on-board branching function is required. Since it is possible to switch to a one-sided guidance system, there is no need for a track branching device, and since only one side of the guide wall is required, the track structure can be simplified and construction costs can be significantly reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view when guiding on one side, Fig. 2 is an enlarged view of the main part, Fig. 3 is a sectional view of the switching holding cylinder part, and Fig. 4. FIG. 5 is a plan view when guiding from both sides, and FIG. 5 is a sectional view of the switching holding cylinder portion. 1... Orbit, 2... Guide wall, 3...
...Vehicle body, 4...Axle, 6...Wheel, 8...Tie rod, 12...Steering arm, 15... Guide shaft, 17... Guide ring, 19... Swing arm, 20... Branch cylinder, 22... Coil spring, 23...
...Switching holding cylinder, 30...Lock device.

Claims (1)

[Claims] 1. A pair of front and rear guide shafts mounted on the lower part of the vehicle body so as to be movable in the left and right direction, and guides attached to both ends of the guide shafts so as to protrude from the side surfaces of the vehicle body and roll in contact with the guide walls. In a steering device that steers wheels by having a shaft and a link mechanism that transmits the amount of movement of the guide shaft to a tie rod, a one-sided guide mechanism that selectively presses the guide wheel against either the left or right guide wall. In addition to the above, a steering device is provided with a switching holding mechanism for releasing the pressing force of the one-sided guide mechanism, thereby making it possible to mutually switch between an on-vehicle branch and a ground branch.