JPH10157667A - Auxiliary traveling device for mobile agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate travel on a rough ground so as to safely carry out work when a machine travels on the soft ground with a heavy load mounted by arranging an elevation driving wheel in the lateral directional center rear part of a vehicle body, in which front and rear wheels are arranged on each of the left and right sides, freely oscillationally in the vertical direction via an actuator. SOLUTION: A pair of front wheels and rear wheels 3 are arranged on the front and rear sides of a machine body 1. A supporting frame 42 is protruded backward in the machine body 1 rear lateral center, and in a lateral directional shaft 44 arranged in a supporting frame 42 rear side vertical column 43, upper end parts of a pair of stays 45 are installed oscillationally. In the lower parts of the stays 45, a pair of forks 46 are installed freely oscillationally in the lateral direction, while in the lower ends of the forks 46, an elevation driving wheel 5 is installed. An actuator 4, in which one end is installed to the vertical column 43 upper part while the other end is installed on the stay 45 side, is expanded/shrunk by means of a lever operation so as to vertically oscillate the elevation driving wheel 5. If the rear wheel 3 is sunk in the muddy ground, the elevation driving wheel 5 is operated to be lowered after a plate 53 and the like is placed beneath the elevation driving wheel 5. Then, the rear wheel 3 is lifted, so that an escape can be carried out easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary traveling device for a mobile agricultural machine that travels on rough terrain or muddy terrain.

[0002]

2. Related Art and Problems to be Solved by the Invention
In the conventional mobile agricultural machine, the running performance is improved by driving all the front and rear wheels provided in front and behind the body. In such a conventional four-wheel drive wheel, if the width of the tread surface of the wheel is small, some of the wheels sink down in muddy ground and the fuselage tilts, or a heavy object is mounted on the vehicle body to travel on soft ground. Then, there was a problem such as difficulty in running due to slipping of the wheels.

[0003]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, an up-and-down drive wheel 5 is provided via an actuator 4 at the center rear portion of the body 1 in which the front and rear wheels 2 and 3 are disposed on the left and right, via an actuator 4. The configuration is an auxiliary traveling device for agricultural machinery.

[0004]

While the vehicle 1 is traveling, the lifting drive wheel 5 is lowered until it comes into contact with the ground surface, and by driving this, the traveling of the vehicle 1 forward or backward is assisted, and traveling on uneven terrain is performed. make it easier. Further, since the vertically driving wheel 5 can be swingably adjusted in the vertical direction, for example, when the rear wheel 3 sinks into the ground and cannot be driven, the vertically driving wheel 5 is once lifted up, and the vertically driving wheel 5 is lifted. When the lifting drive wheel 5 is lowered after a plate or the like is placed on the lower surface of the rear wheel 5, the rear wheel 3 floats up to easily escape from muddy ground, and the lift drive wheel 5 is used as a jack.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated example is a riding management machine 6 which is a mobile farming machine, and the present invention is inserted into the rear part of the body 1 of the riding management machine 6. A front wheel 2, 2 and a rear wheel 3, 3 having substantially the same outer diameter and a small tread width are disposed in front and behind the body 1, and an axle case before and after connecting the respective front and rear wheels 2, 3 left and right. Although the space between 15 and 16 is not shown,
The main strength member of the fuselage 1. An engine (not shown) is mounted inside a hood 7 between the front wheels 2 and 2, and a handle 8 is provided behind the hood 7. By steering the steering wheel 8, the front wheels 2, 2
Is steered, the front and rear wheels 2 and 3 are simultaneously steered, or changed by the driver turning the operation switch 9 on and off.

A driver's seat 10 is disposed above the rear wheels 3, 3, and a tank 12 is removably mounted on a floor 11 at a rear portion of the floor 11 from both sides of the driver's seat 10. . The tank 12 stores a chemical solution for the spraying device 13 attached to the front of the body 1.
Although not shown, a pump for pumping a chemical solution is attached to the lower body 1 and driven. The spraying device 13 attached to the front of the body 1 and the pump are connected by a pressure-resistant hose (not shown), and the spray tube 14 is spread in the width direction of the machine body 1. A plurality of nozzles 15, 15. . . The traveling work is performed while spraying on the surface of a field or on a crop. Specifically, the upper and lower links 54, 54, which are parallel links, provided at the front of the body 1 of the riding management machine 6 are arranged at the front of the body 1. The front frame 55 is moved up and down, and the spray device 13 attached to the front frame 55 is moved up and down. The spraying device 13 is a central spraying unit 5 at the center in the left-right direction.
6 and a working state position where it can be folded down along the front-rear direction of the body 1 on the left and right sides of the body 1 or aligned straight in the horizontal direction from the central spraying section 56. Water mixed with the medicine stored in
The pump is sucked and pressurized by a pump at the lower part of the tank 12, and the control valve switches the discharge direction independently or simultaneously of the central spray portion 56, the left spray tube 14 or the right spray tube 14, which is a plurality of spray portions. , Pressure water is sent to the required part in front of the body 1, and the water mixed with the medicine is supplied to the plurality of nozzles 15, 1.
5. . . From above, the crops (B) planted in rows on the surface of the field are sprayed from above to below, and run without stepping on the crops (B) for disinfection and pest control.

Next, the steering mechanism will be described mainly with reference to FIG. Final cases 17, 17 of front wheels 2, 2 are attached to left and right ends of the front axle case 15, and knuckle arms 18, 18 projecting forward from the final case 17 are tie rod 1 ends.
9 and is connected to the body 1 and one knuckle arm 18
A front actuator 20, which is a hydraulic cylinder, is mounted therebetween.

[0008] Final cases 21, 21 of rear wheels 3, 3 are attached to the left and right ends of the rear axle case 16, and knuckle arms 22, 22 projecting rearward from the final case 21, have tie rods. 23
The knuckle arm 22 is connected to the fuselage 1
A rear actuator 24 which is a hydraulic cylinder is mounted between the stays protruding to the side.

An orbit roll 2 is provided below the handle 18.
5 is provided with an all-hydraulic steering device, which is provided at an appropriate position of the body 1 and discharges high-pressure oil from a pump 26 driven by an engine via a front-wheel steering solenoid 27 or a rear-wheel steering solenoid 28. The oil path of the airframe 1 can be switched to left steering or right steering by either rear-wheel steering or four-wheel steering in the opposite phase.

In the hydraulic piping diagram, the oil passage of the front wheel steering solenoid 27 allows the pump 26 and the front actuator 20 to communicate with each other. Solenoid for rear wheel steering 2
The oil passage 8 has a closed state between the pump 26 and the rear actuator 24. In this state, the power supply to the solenoids of the front and rear wheels is turned off, and the steering of the front wheels 2 is given priority. When the driver turns on the operation switch 9 from this state, the rear wheel steering solenoid 28 is switched to the communication chamber 28a side, and the four-wheel steering is performed in the opposite phase state.
At this time, a rear wheel steering solenoid 2 is attached to a steering actuator 30 which is a hydraulic cylinder for steering the lifting drive wheel 5.
The hydraulic oil flows through the communication chamber 28a of
At the same time in the same direction. Reference numeral 29 denotes a back pressure opening type check valve, and the pressure oil supplied to the front actuator 20 is
When the back pressure is not raised, backflow from the front actuator 20 to the orbit roll 25 is prevented.

Next, the hydraulic and electric circuit portions will be described mainly with reference to FIG. An elevating operation lever 31 is provided near the driver's seat 10. A front / rear operation angle of the elevating operation lever 31 is detected by a potentiometer 32,
To the electrical circuit wiring 35. The CPU 33 is connected to a solenoid valve 34 having a plurality of switching chambers by a wiring 36.

The oil in a tank 38 is supplied to the solenoid valve 34 via a pipe 39 by a pump 37 driven by an engine or the like. Reference numeral 40 denotes a drain pipe which discards oil supplied to the solenoid valve 34 to the tank 38 side. The solenoid valve 34 and the actuator 4 are connected by two pressure oil supply / discharge pipes 41, 41. The CPU 33 controls the solenoid valve 34 so that the length of the actuator 4 is proportional to the detection value of the potentiometer 32. Controlling.

Next, the structure around the drive wheel 5 will be described. A support frame 42 projects rearward from the left and right center of the rear of the body 1, and upper ends of stays 45, 45 are swingable on a left and right shaft 44 provided on a vertical column 43 behind the support frame 42. Installed. Fork 4 is provided at the bottom of stay 45
6, 46 are attached to be able to swing left and right,
The above-described steering actuator 30 is provided between the two to perform steering, and the lifting drive wheel 5 is simultaneously steered in the same direction as the rear wheel 3.

Further, an HST pump 47 is disposed at an appropriate position of the airframe 1, and an HST motor 48 mounted on a side of a fork 46 having the lower drive wheel 5 mounted on a lower end.
Are connected by pipes 49, 49 so as to be hydraulically driven. Reference numeral 50 denotes a transmission case, which is a motor 4 for HST.
8 and the drive shaft 51 of the lifting drive wheel 5 are connected to transmit power. Reference numeral 52 denotes a vehicle speed sensor.
Of the HST pump 4
7, the peripheral speed of the lifting drive wheel 5 is automatically adjusted. The peripheral speed of the lifting drive wheel 5 is adjusted by the position of the shift lever of the body 1 (not shown) and the rotation of the engine.
The vehicle speed may be calculated to control the discharge amount of the pressure oil of the HST pump 47.

One end of the actuator 4 for adjusting the elevation of the drive wheel 5 is attached to the upper part of the vertical column 43, and the other end is attached to the stay 45. The actuator 4 is extended and contracted in proportion to the operation of the elevation operation lever 31. Then, the lifting drive wheel 5 swings up and down. The range of the vertical movement can be adjusted from below the extension line "A" of the front and rear wheels 2, 3 to near the upper end of the rear wheel 3 as shown in FIG. 2, and as shown in FIG. When sinking below the surface of the ground, placing a flat material such as a plate 53 under the lifting drive wheel 5 and then moving the lifting drive wheel 5 down causes the rear wheel 3 to float up and easily escape.

[0016]

According to the present invention, a drive wheel 5 is provided at the rear center of the body 1 in which the front and rear wheels 2 and 3 are disposed on the left and right sides via an actuator 4 so as to be vertically swingable.
The auxiliary traveling device for a mobile agricultural machine is characterized in that the lifting drive wheel 5 is lowered until the vehicle comes into contact with the ground surface while the vehicle 1 is running, and the vehicle 1 is driven. This assists the vehicle to advance before or after, and facilitates traveling on uneven terrain. Further, the lifting drive wheel 5
Can be adjusted in the vertical direction, for example, when the rear wheel 3 goes underground and cannot run, the lifting drive wheel 5 is lifted up once, and a plate or the like is placed on the lower surface of the lift drive wheel 5. Then, when the elevator drive wheel 5 is lowered, the rear wheel 3 rises and it is easy to escape from muddy ground, and the elevator drive wheel 5 can be used as a jack, You can work with confidence even when traveling.

[Brief description of the drawings]

FIG. 1 is an overall side view in a state where main parts are attached.

FIG. 2 is an enlarged side view of a main part showing a suspended state.

FIG. 3 is a rear view of only a main part showing a grounded state.

FIG. 4 is an explanatory diagram of a hydraulic circuit related to steering.

[Explanation of symbols]

 1 Aircraft 2 Front wheel 3 Rear wheel 4 Actuator 5 Lifting drive wheel

Continuing from the front page (72) Inventor Masato Nagai 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] An elevator drive wheel (5) is provided at the rear center of the body (1) in which the front and rear wheels (2) and (3) are disposed on the left and right sides via an actuator (4) via an actuator (4). Auxiliary traveling equipment for mobile agricultural machines.