JPS616062A - Changeover device for forward and backward movement in automatic steering gear for car - 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 (Industrial Application Field) The present invention relates to the operation of vehicles in a new transportation system called a guideway system, in which vehicles travel along guide walls erected on both sides or one side of a running track. Recruited towards
This relates to a forward/reverse switching device.

(Prior Art) In the above-mentioned guide system, a vehicle runs along a guide wall erected on the side of a running track with a flat running surface.
The vehicle is equipped with an automatic steering device to make it run more smoothly.

The basic structure of this automatic steering system is, as shown in FIG. A steering rod 7 connects the knuckle arm 3 and a rotating lever 6 that is rotatable about a pivot shaft 5.
The connecting rod 10 of the guide wheel arm 9 equipped with the guide wheel 8 is connected to the rotating lever 6, and the rotating lever 6 is rotated by the movement of the guide wheel arm 9 in the width direction, and the moving direction of the guide wheel frame 9 and the rotating lever 6 are rotated. The wheels 4 are moved relative to the axle 1 in the same direction or in the opposite direction.

In this automatic steering device, the direction in which the wheels are steered and rotated relative to the left and right movement of the guide wheel frame 9 is reversed when moving forward and when moving backward. (not shown), it is operated by a forward/reverse speed switching device U that moves and switches from the state shown by the solid line to the state shown by the two-dot chain line in the figure.

[Problem that the invention seeks to solve]

In this cylinder-based forward/reverse switching device, if the cylinder or related valves or piping system breaks down and the cylinder becomes free, the moving force of the guide wheel arm is transferred to the connecting rod via the rotating lever. There is a problem in that the cylinder is not accurately transmitted and the cylinder is expanded or contracted, gradually shifting the correct fixed position of the connecting rod with respect to the rotary lever, making it difficult to steer the wheels.

Furthermore, the method disclosed in Japanese Patent Application Laid-open No. 56-163956 has a problem in that the apparatus becomes complicated.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a forward/reverse switching device connected to the automatic steering system of a vehicle, in which the connecting position of the steering rod and the rotating lever is rotated by a cylinder depending on the direction of travel of the vehicle. It is characterized by moving back and forth on the pivot of the lever and locking with a spring cylinder.

(Example) An example of the present invention will be described based on FIGS. 1 to 5. Components in the figure that are the same as those in FIG. 6 will be described with the same reference numerals.

A connecting rod 10 that moves together with a guide wheel arm (not shown) is attached to a rotating lever 20 that is supported so as to be rotatable left and right in FIG. 1 about a pivot 5 provided on the vehicle body. The lever 20 is rotated left and right about the pivot 5.

1i1! A steering rod 7 is fixed to the elongated hole 21 of the lever 20 with a pin 22 so as to be movable back and forth on the pivot shaft 5. A piston rod 24 of a cylinder 23 is attached to the pin 22, and the expansion and contraction of this rod 24 causes the steering to be controlled. The rod 7 is moved back and forth around the pivot 5.

Further, a connecting link 25 is attached to the pin 22, and one end of the connecting link 25 is connected to a lock pin 27 provided movably within a long hole 26 provided in the rotation lever 20.

The rotation lever 20 is provided with a spring cylinder 28, and a lock rod 30 is attached to the tip of the piston rod 29.
The wedge 30a at the tip of is brought into contact with the lock pin 27 and locked.

Next, the operation of the rotating lever 20 configured as described above will be explained.

As shown in FIG. 1, the cylinder 23 and the spring cylinder 28
When the air is removed, the lock rod 30 moves forward by the elastic force of the spring 31 in the spring cylinder 28, and locks the lock bin 27 with the wedge 308 at the tip of the lock rod 30.
The steering rod 7 is fixed in the forward position.

To fix the steering rod 7 in the reverse position, the third
As shown in the figure, air is sent to the spring cylinder 28, and the piston rod 29. The lock rod 30 is moved back to release the lock pin 27 from the wedge 30a. As a result, the lock bin 27 becomes free, and the steering rod 7 connected thereto can be moved. As shown in FIG. 4, air is supplied to the cylinder 23, and the piston rod 24
, and move the steering rod 7 to the rear of the pivot shaft 5. As shown in FIG.
0a is brought into contact with the lock bin 27 and locked, and the steering rod 7 is fixed in the reverse position.

In the above embodiment, the cylinder 23 and the spring cylinder 28 have been described as air cylinders operated by air, but it is of course possible to use hydraulic cylinders.

[Effects of the Invention] As described above, in a forward/reverse switching device in a vehicle steering system, the present invention uses a cylinder to adjust the connection position of the steering rod and the rotary lever depending on the traveling direction of the vehicle. The steering rod moves back and forth and is locked by a spring cylinder, so even if there is a failure in the air or pressure oil piping system supplied to the cylinder, the steering rod will be fixed by the spring force of the spring cylinder, so the running wheels will not move. It does not interfere with steering, and has a simpler structure than conventional devices, making maintenance and inspection easier.

[Brief explanation of the drawing]

Fig. 1 is a sectional front view showing one embodiment of the forward/reverse switching device according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ of Fig. 1, and Figs. 3 to 5 are front and rear views according to the present invention. FIG. 6 is a sectional front view showing the operation of the forward switching device, and FIG. 6 is a plan view showing the automatic steering device. 1 is an axle, 2 is a tie rod, 3 is a knuckle arm, 4 is a running wheel, 5 is a polar shaft, 6 is a rotating lever, 7 is a steering rod, 8 is a guide wheel, 9 is a guide wheel arm, 10 is a connecting rod, 20 is a rotating lever, 21 is a long hole, 22 is a bottle,
23 is a cylinder, 24 is a piston rod, 25 is a connecting link, 26 is a long hole, 27 is a lock bin, 28 is a spring cylinder, 29 is a piston rod, 30 is a lock rod, and 31 is a spring.

Claims (1)

[Claims] 1. Equipped with a running wheel that runs on a running track and a guide wheel that rolls along a guide wall erected on the side of the running track,
A steering rod connected to a knuckle arm that rotates a running wheel in an automatic steering system for a vehicle that steers the running wheel by transmitting the movement of a guide wheel frame that supports the guide wheel to the running wheel via a rotation lever. One end is connected to the rotary lever, and the connecting position of the steering rod and the rotary lever is moved forward or backward about the axis of the rotary lever by a cylinder depending on the direction of travel of the vehicle, and is locked by a spring cylinder. A forward/reverse switching device in an automatic steering system for a vehicle.