JPH11332328A - Rice transplanterr - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter capable of simplifying an operation, preventing malfunction and safely carrying out U-turn traveling by reducing the number of revolutions by an engine to a set number of revolutions by a specific method. SOLUTION: This rice transplanter is equipped with a planting clutch C for connecting and disconnecting the power transmission from an engine E to a planting apparatus and the number of revolutions of the engine E is reduced to a set number of revolutions with interlocking the disconnection of the power transmission of the planting clutch C. In the operation, preferably the number of the revolutions of the engine E is raised to that during the planting operation with interlocking the connection of the power transmission of the planting clutch C and a time for raising the number of revolutions of the engine E from the set number of revolutions to that in the planting operation can be arbitrarily set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rice transplanter.

[0002]

2. Description of the Related Art Conventionally, when a rice transplanter reaches an end of a field during a planting operation, the planting clutch is operated to temporarily stop the planting operation, and an accelerator lever is operated to reduce the traveling speed.
Operate the planting device raising / lowering lever to raise the planting device, operate the steering wheel to make a U-turn to position the rice transplanter on the next planting strip, and then operate the planting device raising / lowering lever again. An operation is performed in which the planting device is lowered, the accelerator lever is operated to set a traveling speed suitable for the planting operation, and the planting clutch is operated to restart the planting operation.

[0003]

However, every time the plant reaches the end of the field, the above operation requires the operation of the planting clutch lever, the accelerator lever, the planting device elevating lever, and the steering wheel, which makes the operation complicated. In particular, since it is necessary to operate the levers simultaneously, the operation requires skill and the risk of erroneous operation is high.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a rice transplanter having a planting clutch for connecting and disconnecting power transmission from an engine to a planting device. It is an object of the present invention to provide a rice transplanter characterized by lowering the engine speed to a set speed.

[0005] The present invention also has the following features.

In conjunction with the power transmission connection of the planting clutch, the engine speed is increased to the speed at the time of the planting operation, and the engine speed is increased from the set speed at the time of the planting operation. Time can be set arbitrarily up to the number of rotations.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is arranged such that the number of revolutions of an engine is controlled by a controller provided with a microcomputer, and the controller includes a switch for detecting a power transmission / disconnection state of the planting clutch. By connecting a low-speed rotation speed setting device that sets the rotation speed of the engine to a rotation speed suitable for U-turn running and an accelerator sensor that detects the operating position of the accelerator lever, the power transmission of the planting clutch is cut off, In the meantime, the rotation of the engine, which has been maintaining the rotation speed suitable for the planting operation by the output of the accelerator sensor, is reduced to the set rotation speed suitable for the U-turn running by the low-speed rotation setting device. .

Further, at the same time when the power transmission of the planting clutch is connected, the engine speed, which has been maintaining the set speed set by the low speed engine speed setting device, is changed based on the output of the accelerator sensor. The number of revolutions is increased to a level suitable for

[0009] In addition, a rotation speed increase ratio setting device is connected to the controller so that a user can arbitrarily set a time for raising the engine rotation speed from the set rotation speed to a rotation speed suitable for planting work. I have.

Therefore, when the planting clutch reaches the end of the field during the planting operation, simply operating the planting clutch lever to the power transmission disconnection side reduces the engine rotation to the set number of revolutions, thereby reducing the traveling speed of the rice transplanter. Is reduced to a speed suitable for U-turn driving, so that operation is simplified, malfunction is prevented, and
Turn driving can be performed. In addition, since the set rotation speed can be arbitrarily set by the user, the U-turn can be performed at a running speed according to the user's preference.

Further, when the planting operation is resumed after the U-turn running, the operator only needs to operate the planting clutch lever to the power transmission connection side, and the rotation of the engine is controlled during the planting operation based on the output of the accelerator sensor. The number of rotations rises to the previous speed and returns to the previous planting traveling speed, so that a highly efficient planting operation can be performed. In addition, since the user can arbitrarily set the time for shifting from the set rotation to the rotation during the planting operation, a rapid increase in the engine speed is prevented, and the traveling speed of the rice transplanter can be reduced according to the user's preference. By shifting from a speed suitable for U-turn running to a speed suitable for high-speed planting work, smooth planting work can be performed.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a rice transplanter A according to the present invention. The rice transplanter A is provided behind a self-propelled traveling machine body 1 via a lifting link mechanism 2 and a left-right tilt mechanism 3. Connect the 10-row planting device B so as to be able to move up and down and tilt left and right,
While pulling the planting device B with the traveling machine body 1, seedlings are planted on the rice field.

The traveling body 1 is configured as a four-wheel drive vehicle that drives both the left and right front wheels 4 and the left and right rear wheels 5. An engine E is disposed inside the hood 6, and the hood 6 is
A steering wheel 7 protrudes from the rear of the vehicle, and a main clutch pedal 8 is provided below and to the left and right of the steering wheel 7.

An accelerator lever 9 is provided on the right side of the steering wheel 7, and a planting clutch lever 12 having a planting clutch guide groove 11 inserted therethrough is provided on the right side of the seat 10.

As shown in FIG. 2, the planting clutch guide groove 11 is formed to extend in the front-rear direction, and at the front of the movable range of the planting clutch lever 12, the transmission ratio of the auxiliary transmission is It can be operated so that the front is fast and the back is slow,
At the rear, the planting device B can be operated so that the front is lowered and the rear is raised. Can be operated "off".

The left and right recesses 13 are respectively located at the forward and rearward positions in the middle of the planting clutch guide groove 11.
When the planting clutch lever 12 is positioned in one of the left and right recesses 13, the side marker on that side is lowered. I try to stop it.

On the left side of the seat 10, there is disposed a main transmission lever 18 which is inserted through the main transmission guide groove. The main transmission guide groove is formed in a substantially Y-shape expanding rearward. When the main transmission lever 18 is located at the front end of the main transmission guide groove, the main clutch is in the "on" position, and the main transmission has a gear ratio suitable for traveling on the road. When the main clutch is turned on, the main clutch is turned on and the vehicle moves backward. The rear end on the left side is the seedling splicing position, and the main clutch is turned off at the same position.

In the planting apparatus B, a connecting pipe 20 extending in the left-right direction is inserted through a central planting case 19, and a plurality of planting cases 21 are arranged in the connecting pipe 20 at appropriate intervals. Above, a seedling table 24 inclined forward and rearward is disposed via upper and lower rails 22 and 23 extending in the left and right direction so as to be reciprocally movable left and right. By the operation, a predetermined amount of seedlings is scraped from the seedling mat placed on the seedling placing stand 24 and is planted on the rice field. Also, as shown in FIG. 1, the right and left ends of the seedling mounting table 24 and the outer planting case.
21 can be folded upward, and at the time of planting work, these can be expanded outward to allow 10-row planting. In the figure, 24a is an auxiliary nursery stand and 26 is a float.

As shown in FIGS. 1 and 3, the elevating link mechanism 2 includes upper and lower frames 27 standing on the rear of the traveling body 1 and a portal frame connected to the lower front of the planting device B. The upper and lower parts 28 are connected by a top link 29 and a lower link 30, respectively, and the planting device B is moved up and down by the expansion and contraction operation of a hydraulic cylinder 31 for elevating.

As shown in FIGS. 3 and 4, the left-right tilting mechanism 3 includes a rolling shaft 32 in which the portal frame 28 and the central planting case 19 are disposed with their shafts extending substantially in the front-rear direction. And a support 33 erected on the upper surface of the portal frame 28 and a support 33 erected on the central planting case 19 to support the upper rail 22 while rotatably connecting the upper rail 22. The rod type tilting hydraulic cylinder 35 is interposed, and the planting device B is moved by the expansion and contraction operation of the tilting hydraulic cylinder 35 to move the planting machine 1.
To the left and right.

FIG. 5 shows a power transmission mechanism D to the planting device B.
And a controller 40 for controlling the power transmission mechanism D.

The power transmission mechanism D has an continuously variable transmission 41 interlockingly connected to the engine E, a main clutch 42 interlockingly connected to the continuously variable transmission 41, and a transmission 43 interlockingly connected to the main clutch 42. The planting clutch C is interlockingly connected to the transmission 43, and the planting device B is interlockingly connected to the planting clutch C, while the rear axle 44 connected to the left and right rear wheels 5 is interlockingly connected to the transmission 43.

Accordingly, the power for driving the planting device B is transmitted in the order of the engine E → the continuously variable transmission 41 → the main clutch 42 → the transmission 43 → the planting clutch C → the planting device B. The connection and disconnection of the power transmission of the planting clutch C allows the operation of the planting device B to be turned ON / OFF.

The controller 40 has a built-in microcomputer and has arithmetic and storage functions. The input side of the controller 40 has an accelerator sensor 45, a planting clutch sensor 46, a low speed rotational speed setting device 47, A rotation speed rise time setting device 48, a rotation speed automatic control ON / OFF switch 49,
A rotation sensor 50 attached to the engine E is connected, and a fuel injection amount adjusting device 51 is connected to an output side of the controller 40.

The accelerator sensor 45 is linked to the base end of the accelerator lever 9 via an accelerator wire 52 so as to detect the operation amount of the accelerator lever 9 and output it to the controller 40. .

The planting clutch sensor 46 is provided at the base end of the planting clutch lever 12 so as to be freely attached to and detached from the planting clutch lever 12, so that the planting clutch lever 12 becomes conductive when the planting clutch lever 12 is operated to the power transmission disconnection side. .

The low-speed rotation number setting device 47 has a built-in variable resistor. The resistance value is changed by the dial 53 and output to the controller 40.

The rotational speed rise time setting device 48 has a built-in variable resistor, and changes its resistance value by a dial 54 to output the resistance value to the controller 40.

The rotation sensor 50 is attached to the engine E, and outputs the rotation speed of the engine E to the controller 40.

The fuel injection amount adjusting device 51 is attached to the fuel injection pump 55 that supplies fuel to the engine E, and adjusts the fuel injection amount of the fuel injection pump 55 according to a control signal from the controller 40. .

Next, the operation of this embodiment will be described.

Prior to the start of the planting operation, the low-speed rotation setting device 47 is set in advance to a value (low-speed rotation) suitable for U-turn running, and the rotation speed rising time setting device 48 is set to a user's favorite value. Set and turn on the automatic rotation speed control ON / OFF switch 49
Then, the engine E is rotated at a rotation speed (high-speed rotation speed) suitable for the high-speed planting operation by the accelerator lever 9 to perform the planting operation.

During the high-speed planting operation, when the planting clutch lever 12 is operated to the power transmission disconnection side to stop the operation of the planting device B when it reaches the end of the field, the engine E is automatically rotated. Since the number is reduced from the high speed set by the accelerator lever 9 to the set speed set by the low speed setter 47, the U-turn traveling can be performed safely.

After the U-turn running, the planting device B
When the planting clutch lever 12 is operated to the power transmission connection side in order to restart the operation of the engine E, the rotation speed of the engine E is set by the accelerator lever 9 from the low rotation speed previously set by the low rotation speed setting device 47. Since the high-speed rotation speed is increased, it is possible to automatically return to an efficient high-speed planting operation.

In addition, since the rotation speed is gradually increased over the time set by the rotation speed rising time setting unit 48, no shock occurs, and problems such as collapse of the seedling on the seedling mounting table 24 are prevented. can do.

Further, the control of the rotation speed of the accelerator lever 9 is prioritized over the control of the rotation speed of the engine E of the planting clutch lever 12, and therefore, the set rotation speed is too high and U
When a danger is felt during the turn running, the danger can be avoided by operating the accelerator lever 9 to the low speed side to reduce the running speed.

When moving in a field where planting work is not performed, the rotation speed automatic control ON / OFF switch 49 is turned off, and the rotation speed of the engine E is adjusted by the accelerator lever 9 to adjust the rotation speed. You can run at the speed of.

FIG. 6 shows that the main clutch pedal 8, the main shift lever 18 and the accelerator lever 9 are connected via a connecting wire 60 so that when the main shift lever 18 is at the seedling connection position 17a,
While the main clutch pedal 8 holds the depressed state,
This embodiment shows another embodiment in which the accelerator lever 9 is forcibly operated to the low speed side to automatically reduce the rotation speed of the engine E so as to reduce noise and waste of fuel during the seedling splicing operation.
In the figure, 61 is a return spring of the accelerator sensor 45.

[0040]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, in a rice transplanter having a planting clutch for connecting / disconnecting power transmission from the engine to the planting device, the rotation speed of the engine is linked to the power transmission disconnection of the planting clutch. , The engine speed can be reduced by simply operating the planting clutch to the power transmission disconnection side,
It is possible to make the U-turn traveling safe while simplifying the driving operation at the end of the field. In addition, the above-mentioned set rotation speed is set to a value corresponding to the driving speed at the time of the U-turn suitable for the driving level of the user and the field conditions, and the time required for the U-turn traveling while shortening the work while ensuring safety is reduced. Efficiency can be improved.

According to the second aspect of the present invention, the engine speed is increased to the speed at the time of the planting operation in conjunction with the power transmission connection of the planting clutch. The time required to increase from the set number of rotations to the number of rotations during planting work can be set arbitrarily, so the engine speed can be increased simply by operating the planting clutch to the power transmission connection side. When the U-turn at the end of the field is completed while simplifying the driving operation at the end of the field, efficient high-speed planting work can be resumed immediately, and the increase in the number of rotations increases the number of rotations. Since the operation is performed gently over the time set by the time setting device, no shock occurs, and problems such as collapse of the seedling on the seedling mounting table can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a rice transplanter according to the present invention.

FIG. 2 is a plan view of a planting clutch guide groove.

FIG. 3 is a side view of a left-right tilting mechanism.

FIG. 4 is a plan view of a left-right tilting mechanism.

FIG. 5 is an explanatory diagram showing a configuration of a power transmission mechanism and a controller.

FIG. 6 is an explanatory diagram showing a configuration of another embodiment.

[Explanation of symbols]

 A Rice transplanter B Planting device C Planting clutch E Engine

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toshiaki Kasahara 1-32 Chayacho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Agricultural Machinery Co., Ltd.

Claims (2)

[Claims] A rice transplanter (A) having a planting clutch (C) for connecting and disconnecting power transmission from an engine (E) to a planting device (B).
2. The rice transplanter according to claim 1, wherein the rotation speed of the engine (E) is reduced to a set rotation speed in conjunction with the disconnection of the power transmission of the planting clutch (C). 2. The rotation speed of the engine (E) is increased to the rotation speed at the time of the planting operation in conjunction with the power transmission connection of the planting clutch (C), and the rotation speed of the engine (E) is further increased. 2. The rice transplanter according to claim 1, wherein a time required for increasing the rotation speed from the set rotation speed to the rotation speed during the planting operation can be set arbitrarily.