JPH0741663Y2 - Trolley steering device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a steering device for a bogie, which steers the bogie so that the bogie can travel straight and can turn.

(Prior Art) Conventionally, as a steering device for a bogie of this type, for example, left and right turning wheels are interlockingly connected so as to be able to turn in the same direction through a complicated link mechanism, and a hydraulic cylinder is connected to this link mechanism. There is a structure in which the left and right turning wheels are steered through the link mechanism by connecting and expanding and contracting the piston rod of the hydraulic cylinder so that the left and right turning wheels can run straight and left and right.

Further, as described in Japanese Utility Model Publication No. 62-39971, there is known a structure in which a neutral position returning device attached to a vehicle body is connected to a steering rod of a rear wheel steering device via a connecting rod. This neutral position returning device includes a cylindrical casing extending in the lateral direction of the vehicle body, a guide rod slidably pierced through the casing and fixed to the stopper rod at a central portion, and a guide rod of the guide rod. A pair of opposing springs, which are compressed between a spring seat whose movement is regulated by the stopper member and an end wall portion of the casing, and projectingly provided on the inner wall of the casing corresponding to the stopper member of the guide rod. A stopper member for pre-compressing each spring, and an annular elastic body such as rubber fixed between the stopper member and the spring seat and fixed to the spring seat are provided. .

(Problems to be solved by the invention) In the steering apparatus of the bogie, the structure in which the left and right turning wheels are turned together in the same direction is complicated, which is one of the causes of cost increase. When shifting from straight to straight running, the piston rod extended by making the supply of pressure oil to the hydraulic cylinder zero is gradually contracted, and the left and right turns are made through the operation of the link mechanism linked to this. Since the wheels will gradually shift to the straight running state, therefore,
There is a problem that the movement of the slewing wheel from the turning traveling state to the straight traveling is slow and lacks swiftness, which often causes inconvenience in traveling.

Further, in the neutral position returning device, an annular elastic body absorbs a deviation between the position of the stopper member and the neutral position of the steering rod due to a manufacturing error or the like. Since the stopper members on both sides are installed on the inner wall of the narrow part in the casing, the mounting work is not easy, and it is difficult to determine the setting position, so manufacturing errors easily occur. When the annular elastic body is elastically deformed by an external force, the stability of straight traveling may be impaired. Further, when the annular elastic body is deteriorated, the neutral position of the steering rod cannot be easily adjusted and set. , There is a problem.

Therefore, the present invention has been made in view of such a problem, and it is possible to easily and accurately adjust and set the neutral position of the operating pin that causes the left and right turning wheels to move straight, and the mounting work is easy, and The setting position is easy to determine, no inconvenience occurs even if manufacturing errors occur, the stability of straight running can be always ensured, and the left and right turning wheels can be turned from the turning running state. (EN) Provided is a steering device for a bogie, which can swiftly shift to a straight running state and steered, and has a simple structure, which can greatly improve drivability and reduce costs. The purpose is to do.

(Means for Solving the Problems) A steering device for a bogie of the present invention comprises a bogie body and left and right turning wheels rotatably mounted on both left and right sides of the bogie body with a vertical turning shaft. A left and right swivel arm fixed to the swivel shafts of the left and right swivel wheels, a tie rod having both ends rotatably pivoted between one ends of the left and right swivel arms, and the swivel arm on the one side. A steering hydraulic cylinder pivotally mounted between the other end of the vehicle and the bogie body, and a wheel control device for steering the left and right turning wheels to return from turning to straight running. The wheel control device includes a case body fixed to the bogie body and having a guide long groove in the left-right direction at an upper portion, and a pivot arm pivotally mounted on the one side turning arm so as to be rotatable at one end in a guide long groove of the case body. Has an actuating pin that is movably inserted The actuating arm, the left and right guide rods that are inserted into the case body so as to be able to move forward and backward, and have a holding portion that holds the actuating pin from the left and right directions, and the left and right guide rods are always urged in the axial direction The left and right springs that hold the operating pin in the neutral position where the left and right revolving wheels go straight in the respective holding portions, and the outer ends of the left and right guide rods that project from both ends of the case body. And left and right adjusters that are adjustably attached and that adjust and set the neutral position of the operating pin against the left and right springs.

(Operation) In the vehicle steering apparatus of the present invention, when the hydraulic cylinder is operated and the piston rod thereof is extended in the straight traveling state of the vehicle, for example, the left swing arm is horizontally rotated in conjunction with this. The left turning wheel is steered to a predetermined turning traveling angle.

In addition, the left turning arm is horizontally turned, and in conjunction with this, the tie rod is pushed in the right direction, and the right turning arm is directly turned horizontally by this tie rod, and the right turning wheel is The steering wheel is steered in the same direction as the left turning wheel and at the same turning travel angle.

Therefore, the left and right swiveling wheels are steered to one side in the left and right direction substantially at the same time through the left and right swiveling arms and the tie rods by the operation of the hydraulic cylinders, and the left and right swiveling wheels move the bogie body to the right and left at a predetermined swivel angle. It is turned to one side of the direction.

Further, as described above, at the same time as the left swing arm is horizontally rotated by the piston rod of the hydraulic cylinder,
In conjunction with this, the operating arm is pushed to the right, the operating pin at the tip of this operating arm is guided and moved in the guide long groove of the case body, and this operating pin moves to the right in the moving direction of this operating pin. While compressing the spring, the right guide rod is pushed toward the right and moved outward. Therefore, the left and right turning wheels that are steered by the operation of the hydraulic cylinder are steered to a predetermined turning travel angle while being controlled by the control action of the right spring, and are turned.

Next, when the supply of pressure oil to the hydraulic cylinder is stopped, the actuating arm pushes back to the left via the actuating pin by the return force of the right spring compressed by the actuating pin to the left. Then, the left swing arm is horizontally rotated in the opposite direction to the above-mentioned case, and at the same time, the right swing arm is horizontally rotated by being pulled by the tie rod.

Further, the left and right turning arms are returned and turned, and the left and right turning wheels are turned and returned from a predetermined turning angle to the straight traveling state. Further, the left swing arm is horizontally rotated, and the piston rod of the hydraulic cylinder is contracted by the left swing arm.

Therefore, the supply of the pressure oil to the hydraulic cylinder is stopped in the turning traveling state, the hydraulic cylinder is turned off, and the returning force of the spring forcibly returns and steers the left and right turning wheels to the straight traveling.

Next, if necessary, the adjustment bodies at the outer end portions of the left and right guide rods protruding from both ends of the case body are adjusted to move forward and backward with respect to the respective guide rods, so that the left and right guide rods are resisted against the springs. Is moved forward and backward, and the neutral position of the operating pin is easily adjusted and set by the sandwiching portion at the inner ends of the left and right guide rods.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 4, reference numeral 1 denotes a trolley body, and left and right drive wheels 4 are rotatably mounted on axles 3 at front left and right portions of a frame 2 of the trolley body 1, respectively.
Further, vertical swing shafts 7 are vertically rotatably mounted by bearings 6 on the left and right portions of a horizontal mounting substrate 5 fixed horizontally on the rear side of the frame 2,
A swivel wheel 11 is rotatably mounted on an axle 10 between lower ends of opposing support plates 9 of a bifurcated wheel frame 8 fixed to the lower ends of the left and right turning shafts 7.

Further, a hydraulic drive mechanism 12 is mounted on a substantially middle portion of the frame 2, and a hydraulic motor 13 linked to the hydraulic drive mechanism 12 is mounted on the frame 2. The hydraulic motor 13 has a gear linkage mechanism. Left and right drive wheels 4 through 14
The axle 3 is rotatably interlocked.

Next, the base end of the right swivel arm 15 is integrally fixed to the upper end of the swivel shaft 7 of the right swivel wheel 11, and the upper end of the swivel shaft 11 of the left swivel wheel 11 is fixed. The left swivel arm 16 has an intermediate portion integrally fixed thereto, and between the one end of the left swivel arm 16 and the one end of the right swivel arm 15 is a tie rod 18 in the left-right direction on the vertical axis 17. Both ends are pivotally attached respectively.

Further, a tip end portion of a piston rod 20 of a hydraulic cylinder 19 for steering is rotatably attached to a vertical axis 21 at the other end of the left swing arm 16, and a main body 22 of the hydraulic cylinder 19 is provided.
The base end portion of the above is pivotally attached to the locking body 24 via the cylinder bracket 23 so as to be pivotally adjustable, and the locking body 24 is fixed on the mounting substrate 5.

Next, a wheel control device 25 is provided near the rear end of the mounting board 5.
Is provided. The wheel control device 25 includes a cylindrical case body 26 fixed to the mounting board 5 in the left-right direction.
Cap bodies 27 are respectively fixed to both ends of the case body 26, and insertion holes 28 are formed in the central portions of the left and right cap bodies 27 so as to face each other. Further, piston rod-shaped guide rods 30 are respectively inserted into the insertion holes 28 of the left and right cap bodies 27 so as to be able to move forward and backward, and piston-shaped holding portions 29 are provided at the inner ends of the left and right guide rods 30 which face each other. And the case body.
At the outer ends of the left and right guide rods 30 projecting forward and backward from both ends of 26, stopper nuts as adjusting bodies are provided.
Each 31 is screwed so that it can be moved back and forth.

An operating pin 32 is interposed between the sandwiching portions 29 of the left and right guide rods 30 facing each other.
It is movably inserted inside. In addition, the guide long groove 33
One end of an operating arm 34 is rotatably attached to the upper end of the operating pin 32 protruding upward from the operating arm.
The other end of 34 is rotatably attached to the lower portion of the vertical axis 17 of the tie rod 18.

Further, in the case body 26, coil springs 35 are wound around the left and right guide rods 30, respectively,
The inner ends of the coil springs 35 are pressed against the holding portions 29 of the guide rods 30, and the outer ends of the coil springs 35 are attached to the left and right cap bodies 27.
It is pressed against the inner wall of the. Then, the left and right coil springs 35 constantly urge the left and right guide rods 30 toward the inner axial direction at the same pressure, and the clamping portions 29 at the inner ends of the left and right guide rods 30 act as described above. The pin 32 is sandwiched at a neutral position where the left and right turning wheels 11 travel straight. In this case, the stopper nuts 31 of the left and right guide rods 30 are
It is supported by abutting against the outer end of 27.

Further, a stopper 36 is provided on the right side portion of the mounting substrate 5 so as to prevent the right turning arm 15 from rotating.

Next, the operation of the above embodiment will be described.

By operating the hydraulic drive mechanism 12 to drive the hydraulic motor 13, the axle 3 is rotated via the gear interlocking mechanism 14, and the left and right drive wheels 4 are rotationally driven. And the main body 1 of the trolley by the left and right turning wheels 11.
Goes straight ahead.

Next, when the hydraulic cylinder 19 is operated by the hydraulic drive mechanism 12 to expand / contract the piston rod 20, that is, when the piston rod 20 is extended, for example, as shown in FIG. The turning arm 16 is horizontally rotated counterclockwise in FIG. 2, and the turning shaft 7 of the left turning arm 16 is also turned in the same direction, and the left turning wheel 11 is moved through the wheel frame 8. It is steered to a predetermined turning traveling angle.

Further, as described above, the left swing arm 16 is horizontally rotated counterclockwise in FIG. 2, and the tie rod 18 is pushed by the left swing arm 16 toward the right direction in FIG. Right slewing arm directly by this tie rod 18
2, the turning shaft 7 of the turning arm 15 on the right side is rotated in the same direction, and the turning wheel 11 on the right side moves the turning wheel 11 on the right side through the wheel frame 8. The steering wheel is steered in the same direction as the turning wheel 11 and at the same turning travel angle.

Therefore, when the hydraulic cylinder 19 is actuated, the left and right turning wheels 1 and 16 are moved through the left and right turning arms 15 and 16 and the tie rods 18.
1 is substantially simultaneously steered to one side in the left-right direction, and the left and right turning wheels 11 turn the carriage main body 1 to one side in the left-right direction at a predetermined turning angle.

Further, as described above, the left swing arm 16 is horizontally rotated counterclockwise in FIG. 2 by the piston rod 20 of the hydraulic cylinder 19, and at the same time, the vertical arm 17 of the left swing arm 16 causes the actuating arm 34 to move. Is pushed rightward in FIG. 2, and the actuating pin 32 at the tip of the actuating arm 34 is moved rightward in FIG. 2 along the guide long groove 33 of the case body 26. The operating pin 32 pushes the holding portion 29 of the guide rod 30 on the right side in FIG. 2 inside the case body 26 in the rightward direction in FIG. 2, and the guide rod 30 compresses the coil spring 35. Moved to the outside in the right direction.

Therefore, the left and right turning wheels 11 steered by the operation of the hydraulic cylinder 19 are steered to a predetermined turning traveling angle while being controlled by the control action of the wheel control device 25, and the carriage main body 1 is moved in one of the left and right directions at a predetermined turning angle. It turns to the side.

Next, when the supply of pressure oil to the hydraulic cylinder 19 is stopped by the switching action of the hydraulic drive mechanism 12, the compressed coil spring 35 on the right side in FIG. While returning in the leftward direction, this returning force causes the right guide rod 30 to return inward in the leftward direction in FIG.

Then, the operating pin 32 is pushed inward in the leftward direction in FIG. 2 along the guide long groove 33 by the holding portion 29 of the right guide rod 30, and the operating arm 34 having the operating pin 32.
The left swivel arm 16 is located at the end of the
Simultaneously with the horizontal rotation in the clockwise direction in the figure, the tie rod 18 is pulled by the left swing arm 16 in the left direction in FIG. 2 and the right swing arm 15 is horizontally rotated in the clockwise direction in FIG.

Further, the left and right turning arms 15 and 16 are returned and turned, and the left and right turning wheels 11 are returned and turned from a predetermined turning angle to a straight traveling state via a turning shaft 7 and a wheel frame 8 which are integrated with the turning arms 15 and 16. To be done. Further, the left swing arm 16 is horizontally rotated clockwise in FIG. 2, and the left swing arm 16 causes the guide rod 20 of the hydraulic cylinder 19 to move.
Is contracted.

Therefore, in the turning traveling state, the supply of the pressure oil to the hydraulic cylinder 19 is stopped and turned off, and the left and right turning wheels 11 are forcibly steered from the turning traveling state to the straight traveling state by the wheel control device 25, Trolley body 1
Goes straight ahead.

Next, a wheel control device that causes the left and right turning wheels 11 to travel straight ahead
When it is necessary to adjust the operating pin 32 of 25 to the neutral position, the stopper nuts 31 at the outer ends of the left and right guide rods 30 protruding from the cap bodies 27 at both ends of the case body 26 are rotated. By adjusting the guide rods 30 forward and backward with respect to each other, the left and right guide rods 30 are moved forward and backward against the left and right coil springs 35, and the operating pin 32 is moved by the holding portion 29 of the left and right guide rods 30. It is easily adjusted and set to the neutral position.

That is, set the left and right turning wheels 11 in a straight running state,
Clamping part 29 at the inner end of the left and right guide rods 30 and the operating arm
A gap is created between the operating pin 32 of 34 and the left and right holding parts.
When the operation pin 32 is not sandwiched by the 29, one or both stopper nuts 31 of the outer end portions of the left and right guide rods 30 are pivotally operated, and the left and right guide rods 30 resist the coil spring 35. Is adjusted forward and backward, and the pin 29 of the left and right guide rods 30 holds the operating pin of the operating arm 34.
32 is pinched from the left and right, eliminating the gap between them.
Then, the left and right stopper nuts 31 are brought into contact with the outer side portions of the cap body 27 at both ends of the case body 26. Therefore,
The operating pin 32 is clamped at the neutral position by the clamping portions 29 of the left and right guide rods 30, and the neutral position of the operating pin 32 is easily adjusted and set.

In addition, the operating pin 32
However, if the left and right turning wheels 11 are out of the range for straight traveling, and the truck body bends to the right, for example, the left and right stopper nuts 31 of the left and right guide rods 30
Among them, the right side stopper nut 31 is rotatably operated to move and adjust a predetermined amount toward the outer end portion of the right side guide rod 30 (the direction away from the right side cap body 27),
The left and right stopper nuts 31 are pivotally operated to move and adjust a predetermined amount toward the inner side of the left guide rod 30 (in the direction toward the left cap body 27) to operate with the left and right stopper nuts 31. The neutral position of the pin 32 can be easily adjusted and set, and the problem that the trolley body bends to the right can be easily eliminated.

(Effects of the Invention) According to the present invention, the wheel control device is fixed to the main body of the truck and has a case body in the left-right direction having a guide long groove in the left-right direction at the upper portion, and is pivotally attached to the turning arm on one side. An actuating arm having an actuating pin at one end that is movably inserted in the guide long groove of the case body, and a clamp that inserts movably into and out of the case body and clamps the actuating pin from the left and right directions at the respective inner ends. Left and right guide rods having parts, and left and right springs for constantly biasing the left and right guide rods in the axial direction to hold the operating pins at the respective holding parts at a neutral position where the left and right turning wheels are moved straight, Left and right adjustments are attached to the outer ends of the left and right guide rods protruding from both ends of the case body so as to be adjustable forward and backward, and adjust and set the neutral position of the operating pin against the left and right springs. Since it has a joint body, the neutral position of the operating pin for moving the left and right turning wheels in a straight line can be adjusted easily and accurately by adjusting the left and right adjusters to move forward and backward.

Also, since the left and right adjusters are attached to the outer ends of the left and right guide rods protruding from both ends of the case body so that they can be moved back and forth, the work of attaching the left and right adjusters is easy, and the case body Since the neutral position of the actuating pin can be adjusted on the outside, the adjusting operation is easy and the setting position can be determined easily.Easily correct the deviation of the neutral position of the actuating pin due to manufacturing errors. You can

Further, since the turning arms of the left and right turning wheels are directly rotatably attached by a single tie rod, the left and right turning wheels can be reliably steered in the same direction with a simple structure.

Therefore, the left and right turning wheels can be swiftly and smoothly transitioned from turning to straight running, and the stability of straight running can be ensured, so that the running performance can be greatly improved and its structure is simple and cost-effective. It is possible to provide a steering device for a bogie that can be lowered.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view of a steering device for a bogie, FIG. 2 is an operation explanatory diagram of a hydraulic cylinder with a part cut out, and FIG. FIG. 4 is a rear view with a part cut away, FIG. 4 is a side view with a part of the carriage cut out, and FIG. 5 is a plan view of the same. 1 …… Bogie body, 7 …… Turning axis, 11 …… Turning wheel, 15,16
…… Swivel arm, 18 …… Tie rod, 19 …… Hydraulic cylinder, 25 …… Wheel control device, 26 …… Case body, 29 …… Clamping unit, 30 …… Guide rod, 31 …… Adjuster, 32 …… Actuating pin, 34 …… actuating arm, 35 …… spring.

Claims (1)

[Scope of utility model registration request] 1. A trolley body, left and right slewing wheels rotatably mounted on both left and right sides of the trolley body by vertical slewing shafts, and fixed to the slewing shafts of the left and right slewing wheels, respectively. The left and right swivel arms, the tie rods whose both ends are rotatably pivoted between the one ends of the left and right swivel arms, and the tie rods between the other end of the one swivel arm and the carriage body. A steering hydraulic cylinder that is movably attached to the wheel, and a wheel control device that steers the left and right turning wheels to return from turning traveling to straight traveling are provided. A case body having a guide groove in the left-right direction, and an actuating arm having an actuating pin rotatably attached to the one-side swivel arm and having one end movably inserted in the guide groove of the case body. Is inserted into the case body so that it can move back and forth freely. Left and right guide rods each having a holding portion for holding the operating pin from the left and right direction at the inner end of each, and the left and right guide rods are always urged in the axial direction so that the operating pin is held by each holding portion. Left and right springs for sandwiching the left and right turning wheels in a neutral position for advancing straight, and forward and backward adjustable attachments to the outer ends of the left and right guide rods protruding from both ends of the case body. And a left and right adjuster for adjusting and setting the neutral position of the actuating pin.