JP3596160B2 - Tractor control machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tractor control device, in which a spray pump driven by power from a PTO of a tractor sends liquid pressure to a boom having a nozzle to spray while traveling on a tractor body.
[0002]
[Problems to be solved by the invention]
When the spray pump mounted on the tractor is driven by the ground PTO, the spraying operation can be performed during low-speed traveling. The hydraulic pressure of the pipe also becomes high, which may severely damage the piping.
[0003]
[Means for Solving the Problems]
According to the present invention, when the spray pump P is driven by the ground PTO2 of the tractor 1, the ground PTO2 is turned off or the alarm 4 is actuated by the high liquid pressure within the spray pipe 3 by the spray pump P. And a tractor control machine.
[0004]
【The invention's effect】
In the spraying operation by the tractor 1, while driving the spraying pump P by the ground PTO, the chemical is sent to the nozzle boom via the spraying pipe 3 and sprayed by the hydraulic pressure of the spraying pump P. When the traveling speed of the tractor 1 is increased, the rotation of the ground PTO2 is increased, the driving speed of the spray pump P is also increased, and the hydraulic pressure of the spray pipe 3 is also increased. In this way, when the spraying operation is performed under a relatively low hydraulic pressure, if the spraying pipe 3 goes into a high pressure region of a certain level or more as the traveling speed increases, the ground PTO is cut off. The driving of the spray pump P is stopped or the alarm 4 is activated to warn that the spray pipe 3 has reached the high pressure range. For this reason, the safe driving of the spray pump P by the ground PTO can be performed.
[0005]
【Example】
The tractor 1 allows a front wheel 5 and a rear wheel 6 to be steerable by a steering handle 8 in front of a cockpit 7 and is driven by an engine mounted below a front hood 9. A tank T for storing water, chemicals, and the like is mounted on the rear side of the cockpit 7, and a spray pump P is mounted on the lower rear side of the tank T, so that the main transmission or the auxiliary transmission in the transmission case 10 of the tractor 1 can be mounted. Then, the running shaft 12 which is linked to the running system input shaft 11 such as the front wheel 5 and the rear wheel 6 is linked to the ground PTO2 via the PTO clutch 13 by belt tension. The spray pump P is driven by the ground PTO2.
[0006]
The ground PTO2 may be switched to a live PTO by a switching mechanism so that the live PTO can be obtained as a transmission capable of shifting the PTO separately from the traveling shaft 12 from the engine side.
The PTO clutch 13 rotates a bell crank arm 18 around an arm shaft 17 by a front-rear rotation operation of a PTO clutch lever 16 disposed on a lever guide 15 on the side of the cockpit 7, and By operating the wire 21 of the PTO clutch 13 to be connected and turning the PTO clutch lever 16 to the rear side to stand up, the PTO clutch 13 is set to the disengagement position A, and the PTO clutch 13 is tilted forward to the entry position B. It is linked to. 20 is a link guide.
[0007]
A piston 25 of a cylinder 24 is connected to such a bell crank arm 18 via a wire 22 and a crank arm 23. The cylinder 24 receives the hydraulic pressure from the spray pump P and pushes the piston 25. By pulling the wire 22 and rotating the bell crank arm 18, the clutch lever 16 at the engagement position B can be operated to the disengagement position A. That is, the hydraulic pressure of the spray pump P circuit is detected against the pressure of the spring 26 of the piston 25 in the cylinder 24, and the PTO clutch 13 and the clutch lever 16 are operated to the disengagement position by this detection. At this time, the PTO clutch 13 is disengaged and operated by the detected hydraulic pressure in the cylinder 24 itself. That is, the cylinder 24 also functions as a hydraulic pressure detection sensor and a disconnection operation force of the PTO clutch 13.
[0008]
The tank T mounted on the vehicle body is composed of a water tank T1 and a chemical solution tank T2 in the form of a separate medicine supply. The tanks T1 and T2 are mixed while being sucked into the spray pump P from the tanks T1 and T2. A pipe is connected to each of the booms CB, LB, RB and the like mounted on the front portion, and can be disinfected by spraying from the spray nozzles 28 of each of the booms CB, LB, RB. NV1 is a needle valve that discharges the liquid in the pressure chamber 27 to the water tank T1, and V is a three-way switching valve that switches the liquid from the middle of each of the booms CB, LB, and RB to the water tank T1 and allows the liquid to flow. A needle valve NV2 is provided for regulating the amount of liquid that is switched to and returned to the water tank 1. RV is a relief valve.
[0009]
Each of the booms CB, LB, and RB is mounted on a boom frame 31 that can be moved up and down by a parallel link 29 at the front of the vehicle body and a cylinder 30 that is expanded and contracted by a gear motor M. A centaboom CB is attached to the boom frame 31 along the left and right direction, and hinges 32 are rotated at both left and right ends of the centtab boom CB from the left and right horizontal spray positions to a storage position along a side portion of the upper rear body. Foldable side booms LB and RB are provided. The rotation of the side booms LB and RB is performed by the telescopic cylinder 33.
[0010]
In addition to or instead of the configuration in which the PTO clutch 13 such as the cylinder 24 is disengaged and linked, or instead of this configuration, an alarm such as a buzzer or a warning light is provided by a pressure sensor 34 that detects the liquid pressure in the spray pipe 3 by the spray pump P. It is good also as a structure which makes the device 4 alarm.
5 is different from the above example in that a switch S1 of a ground PTO lever 35 for turning on and off the ground PTO2 and a switch S2 of a speed change lever 36 for performing a traveling shift change the buzzer, the warning light and the like to the alarm device 4. When the ground PTO lever 35 is turned on, the switch S1 is turned on, and the switch S2 is turned on when the shift lever 36 is simply switched to the high-speed running position. It can operate and prevent erroneous operation, and prevent the spray pipe 3 from becoming abnormally high pressure during high-speed traveling.
[0011]
In FIG. 6, a different point from the above example is that a hole 41 through which the string 40 can pass is formed between the spoke 38 and the rim 39 of the front wheel 5 and the rear wheel 6. By wrapping the string 40 around the wheel rim 39 and further tying the rod member 42 with the string 40, escape from the paddy soil surface is facilitated. A reinforcing plate 43 is formed between the spokes 38, and a thick reinforcing rib 44 is formed at a boundary between the reinforcing plate 43 and the hole 41.
[0012]
7 is different from the above example in that a short pipe 45 in the axle direction is fixed near the rim 39 of the spoke 38, the string 40 is passed through the hole 46 of the pipe 45, Is to escape.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a piping diagram of a spray pump and a partially different embodiment thereof.
FIG. 2 is a front view, a side view, and a plan view of the PTO clutch lever unit.
FIG. 3 is an overall side view.
FIG. 4 is a plan view thereof.
FIG. 5 is a side piping diagram and a buzzer circuit diagram showing a partially different embodiment.
FIG. 6 is a side view of a wheel and a cross-sectional view of a part thereof.
FIG. 7 is a side view of a wheel showing another embodiment, and a cross-sectional view of a part of the wheel.
[Explanation of symbols]
1 Tractor 2 Ground PTO
3 Spray pipe 4 Alarm P Spray pump T Tank

Claims (1)

When the spray pump P is driven by the ground PTO2 of the tractor 1, the ground PTO2 is turned off or the alarm 4 is actuated by a high or higher liquid pressure in the spray pipe 3 by the spray pump P. Tractor control machine.

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