JPH086677Y2 - Special vehicle diversion device - Google Patents

Description

[Detailed Description of the Invention] <Industrial application field> The present invention relates to a diverting device for a special vehicle such as a container carrier, and particularly to improve the steering feeling when the special vehicle having a sideways cab is in reverse. It is a thing.

<Prior Art> In a special vehicle such as a container carrier, as shown in FIGS. 3 and 4, a driver's cab 2 is arranged on the upper part of a vehicle body 1 sideways with respect to a traveling direction, and a driver turns a steering wheel to a side. There are those that operate 3. A pair of left, right, first, second, and third wheels 4a, 4b, 4c, and a fourth wheel 4d as a driving wheel are provided at the bottom of the vehicle body 1.

Further, an engine 5, a transmission 6 and a differential reduction gear 7 are arranged above the vehicle body 1, and the differential reduction gear 7 is
Drive propeller 9 via propeller shaft 8
Are connected, and the driving force from the engine 5 is transmitted to the fourth wheel 4d via a chain or the like.

As shown in FIGS. 5 and 6, the conventional turning device has a link device 10 for turning the steering wheel 3 and the wheel 4.
A left cylinder 11 and a right cylinder 12 for hydraulically operating the link device 10, an oil feeding device 13 for selectively feeding pressurized oil to the left and right cylinders 11, 12 by rotating the steering wheel 3, and a tank 14. And a pump 15 for sending pressure oil.

In the figure, 16 is a steering column and 17 is a forward / reverse switching lever.

As shown in FIG. 6, the link device 10 includes a crank 19 attached to the tips of rods 18 of the left cylinder 11 and the right cylinder 12, and a second crank 21 that swings around the shaft 20 integrally with the crank 19. And the fourth wheel connected to the crank 19
4d and the first tie rod 22a and the second crank 2
The second, third, fourth and fifth tie rods 22 connected to 1 for diverting the first, second and third wheels 4a, 4b, 4c in the same direction.
It is composed of b, 22c, 22d, 22e and a bell crank 23 which is connected to the second crank 21 via a sixth tie rod 22f and turns the opposing wheels 4 into the same phase.

With this link device 10, the first, second and third wheels 4a, 4b, 4c are turned in the same direction as the steering direction of the steering wheel 3, and the fourth wheel 4d is turned in the opposite direction. Phase is steered.

<Problems to be Solved by the Invention> In the above-mentioned turning device, as shown in FIG. 7, when the vehicle attempts to turn right while the vehicle is moving forward, the driver 24 turns the steering wheel 3 in the direction of arrow A. At this time, since the driver 24 is sitting sideways with respect to the traveling direction of the vehicle, the line of sight is in the direction of arrow B.

However, as shown in FIG. 8, when trying to turn left while the vehicle is moving backward, the driver 24 must turn the steering wheel 3 in the direction of arrow A while directing the line of sight in the direction of arrow C.

That is, the traveling direction of the vehicle and the steering direction of the steering wheel 3 are the same when moving forward, but the traveling direction and the steering direction are opposite when traveling backward, which is unnatural contrary to the human sense. Therefore, this type of driving requires considerable habituation.

SUMMARY OF THE INVENTION In view of the above, the present invention has an object to provide a turning device for a special vehicle that is driven sideways and can steer the steering wheel with a natural feeling regardless of the traveling direction.

<Means for Solving the Problem> The means for solving the problem according to the present invention is, as shown in FIGS. 1 and 2, a left cylinder in which a driver's cab 2 is arranged laterally on a vehicle body 1 and left and right wheels 4 are turned. In the redirecting device for a special vehicle, which is provided with an 11 and a right cylinder 12, and an oil sending device 13 for guiding pressure oil from the pump 15 to the left and right cylinders 11, 12 by rotating the steering wheel 3, the oil sending device 13 And the left and right cylinders 11 and 12, the switching lever 1 that switches between forward and backward
A switching valve that switches the pressure oil passages 25, 26, 27, 28 to the left and right cylinders 11, 12 so that the wheels 4 are turned in the steering direction of the steering wheel 3 with respect to the traveling direction of the vehicle body 1 in conjunction with 7. 29 is provided.

<Operation> In the above problem solving means, the driver turns the steering wheel 3 to the right when the vehicle attempts to turn right while the vehicle is moving forward. Then, the pressure oil from the pump 15 is sent to the left and right cylinders 11 and 12 from the oil feeding device 13 through the second pressure oil passage 26, the switching valve 29 and the fourth pressure oil passage 28. 4 turns right and the vehicle turns right.

Next, when the vehicle tries to turn left while the vehicle is moving backward, the driver turns the steering wheel 3 to the left while looking at the backward direction. Then, the pressure oil from the pump 15 is sent from the oil feeding device 13 to the switching valve 29 through the first pressure oil path 25.

At this time, the switching valve 29 switches the forward movement of the switching lever 17 from the reverse movement to the first pressure oil passage 25 and the fourth pressure oil passage.
It communicates with 28. Therefore, the pressure oil is the fourth pressure oil path 28.
And is sent to the left and right cylinders 11 and 12. Then, the wheels 4 are turned to the same direction as the right turn when moving forward,
The vehicle turns left while moving backward.

Therefore, when moving forward, the pressure oil path from the pump 15 to the left and right cylinders 11 and 12 is automatically switched in the reverse direction by operating the forward / reverse switching lever 17 in the reverse direction. On the other hand, not only can the steering wheel 3 be turned in the desired direction, but steering can also be performed with a natural feel.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a hydraulic circuit diagram of a diversion device showing an embodiment of the present invention, and FIG. 2 is an operation explanatory diagram of the oil feeding device. It should be noted that the same components as those of the related art are denoted by the same reference numerals.

As shown in the drawing, a device for diverting a container carrier with a sideways cab according to the present invention includes a left cylinder 11 and a right cylinder 12 for diverting the left and right wheels 4, and the left and right cylinders.
Pump 15 by rotating the steering wheel 3 on 11,12
And a left and right cylinders 11 and 12 between the oil supply device 13 and the left and right cylinders 11 and 12 in association with a traveling direction of the vehicle body 1 in association with a switching lever 17 for switching between forward and backward movement. A switching valve 29 for switching the pressure oil paths 25, 26, 27, 28 to the left and right cylinders 11, 12 is provided so that the wheels 4 are turned in the steering direction of the steering wheel 3.

As shown in FIG. 2, the oil feeding device 13 is attached to the lower portion of the column 16 of the steering wheel 3 and is equipped with a rotary valve.
It consists of 30 and the oil sending part 31, and the pressure oil from the pump 15 is supplied to the left and right cylinders 1 according to the steering direction of the steering wheel 3.
The oil is selectively sent to 1,12.

The rotary valve 30 includes a sleeve 32 and a spool 33. The spool 32 is rotatably mounted in the sleeve 32. The spool 33 is connected to the column 16 and is rotated by the rotation of the steering wheel 3. To be done. A cross pin 34 is press-fitted into the sleeve 32, and the cross pin 34 is connected to a drive shaft 35 connected to the oil feeding section 31.

The spool 33 has an inlet port 33a that communicates with the pump 15 and a return port 33b that communicates with the tank 14,
The sleeve 32 has a first port 32a that communicates with the left and right cylinders 11 and 12, and a second port 32b that communicates with the oil supply unit 31. In addition, the inlet port 33a and the return port 33b
A check valve 36 is provided between the two.

The spool 33 is rotated by the rotation of the steering wheel 3 and a relative angular deviation is generated between the spool 33 and the sleeve 32 to switch the oil passage. Further, in the neutral position of the steering wheel 3, the inlet port 33a and the return port 33b.
And the pressure oil from the pump 15 passes through the rotary valve 30 and returns to the tank 14.

The oil feeding unit 31 is composed of a stator 37 and a rotor 38, and the rotor 37 having external teeth meshes with the stator 37 having internal teeth to make an internal rolling motion.

The rotor 38 is connected to the drive shaft 35, and is mechanically connected to the sleeve 32 via a cross pin 34. Then, the stator 37 is formed with a third port 37a communicating with the second port 32b and a fourth port 37b communicating with the left and right cylinders 11, 12. In the figure, 39 is a centering spring.

The switching valve 29 is a four-port two-position switching valve,
The D port communicating with the first port 32a, the E port communicating with the fourth port 37b, the F port communicating with the tail portion 11a of the left cylinder 11 and the head portion 12b of the right cylinder 12, and the left cylinder 11 Head part 11b and right cylinder 1
It has a G port communicating with the second tail portion 12a. Further, it has a first position 29A in which the D port and the F port and the E port and the G port communicate with each other, and a second position 29B in which the D port and the G port and the E port and the F port communicate with each other. .

Then, between the left and right cylinders 11 and 12 from the pressure oil device 13 via the switching valve 29, the first pressure oil path 25 connecting the first port 32a and the D port, the fourth port 37b and the E port. The second pressure oil path 26 connecting the F port and the left cylinder
A third pressure oil passage 27 connecting the tail portion 11a of 11 and the head portion 12b of the right cylinder 12, and a fourth pressure oil passage connecting the G port to the head portion 11b of the left cylinder 11 and the tail portion 12a of the right cylinder 12. 28 and are formed.

Switching of the switching valve 29 is performed by a solenoid 40 and an offset spring 41 which operate in conjunction with switching of the forward / reverse switching lever 17. That is, when moving forward, the solenoid 40 is off and the spring 41 causes the first position 29
It is held at A, the F port communicates with the third pressure oil passage 27, and the G port communicates with the fourth pressure oil passage 28. When moving backward, the solenoid 40 is turned on by switching the switching lever 17,
The switching valve 29 is switched from the first position 29A to the second position 29B, the F port is connected to the fourth pressure oil passage 28, and the G port is connected to the third pressure oil passage 27.

The left and right cylinders 11, 12 and the left and right cylinders 11, 12
Link device 10 for activating wheels 4 to be turned by
Are the same as the conventional ones, and detailed description thereof will be omitted.

In the above configuration, the driver turns the steering wheel 3 to the right when the vehicle tries to turn right while the vehicle is moving forward.
Then, the spool 33 turns around the column 16, the inlet port 33a communicates with the second port 32b, and the return port 33b communicates with the first port 32a.

The pressure oil from the pump 15 is sent to the oil feeding section 31 through the rotary valve 30. The rotor 38 is rotated by hydraulic pressure,
Drive shaft 35, sleeve 32 via cross pin 34
Turn around. That is, when the spool 33 rotates, the sleeve 32 follows and rotates by the same amount. By performing this continuously, the pressure oil is transferred to the fourth port 37b of the stator 37.
Is sent to the switching valve 29 through the second pressure oil path 26.

At this time, since the switching valve 29 is held in the first position 29A, the pressure oil from the pump 15 is sent from the second pressure oil passage 26 to the left and right cylinders 11 and 12 through the fourth pressure oil passage 28. To be Then, the link device 10 is formed by the left and right cylinders 11 and 12.
Is activated, the wheels 4 are turned to turn right, and the vehicle turns right.

Next, when the vehicle tries to turn left while the vehicle is moving backward, the driver turns the steering wheel 3 to the left while looking at the backward direction. Then, the pressure oil from the pump 15 is sent to the switching valve 29 through the first pressure oil passage 25 from the first port 32a of the oil feeding device 13 contrary to the time of right turn.

At this time, the switching lever 17 is switched from forward to reverse, and the switching valve 29 is switched to the second position 29B by the operation of the solenoid 40. Therefore, the pressure oil that has passed through the first pressure oil passage 25 is sent to the left and right cylinders 11 and 12 through the fourth pressure oil passage 28. Then, the wheels 4 are turned to the same direction as the right turn when moving forward, and the vehicle moves backward while turning left.

Therefore, when moving forward, the pressure oil path from the pump 15 to the left and right cylinders 11 and 12 is automatically switched in the reverse direction by operating the forward / reverse switching lever 17 in the reverse direction. On the other hand, it suffices to turn the steering wheel 3 in the direction desired to turn, and steering can be performed with a natural feeling.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, the switching valve 29 is not limited to the solenoid valve interlocked with the switching lever 17, but may be a relay-type electromagnetic valve.

<Effect of the Invention> As is apparent from the above description, according to the present invention, the left cylinder and the right cylinder for turning the left and right wheels, and the left and right cylinders are supplied with pressure oil from the pump by rotating the steering wheel. An oil feed device for guiding the wheels, and the wheels are turned between the oil feed device and the left and right cylinders in a steering direction of a steering wheel with respect to a traveling direction of the vehicle body in association with a switching lever for switching between forward and backward movements. Since a switching valve that switches the pressure oil path to the left and right cylinders is provided, the vehicle turns by simply steering the steering wheel in the direction you want to bend with respect to the traveling direction of the vehicle,
Being able to drive with a natural feeling has an excellent effect.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram of a diversion device showing an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of the oil delivery device, FIG. 3 is a plan view of a container carrier with a sideways cab, and FIG. FIG. 5 is a side view thereof, FIG. 5 is a hydraulic circuit diagram of a conventional diversion device, FIG. 6 is a configuration diagram of a link device, FIG. 7 is an explanatory diagram when turning right when a special vehicle is moving forward, and FIG. The figure is an explanatory diagram when the vehicle is turning left when the special vehicle is moving backward. 1: Vehicle body, 2: Driver's cab, 3: Steering wheel, 4: Wheel, 11: Left cylinder, 12: Right cylinder, 13: Oil feeder, 15:
Pump, 17: switching lever, 25, 26, 27, 28: pressure oil path, 29: switching valve.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B66F 9/24 T 7515-3F

Claims (1)

[Scope of utility model registration request] 1. A driver's cab is arranged laterally in a vehicle body, and a left cylinder and a right cylinder for diverting left and right wheels, and a feed cylinder for guiding pressure oil from a pump to the left and right cylinders by rotating a steering wheel. In a turning device for a special vehicle equipped with an oil device, a steering direction of a steering wheel with respect to a traveling direction of a vehicle body is interlocked with a switching lever for switching between forward and backward movement between the oil sending device and left and right cylinders. A reversing device for a special vehicle, characterized in that a switching valve for switching the pressure oil path to the left and right cylinders is provided so that the wheels are rerouted.