JPS5867111A - Rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The uninvented invention is equipped with narrow propulsion wheels in the left and right center of the front part of the fuselage, and also has a plurality of 70-tooths installed in parallel and a nine-seedling device connected to the rear part of the fuselage. Lower left and right center II of planting device
The tower body provided with C is automatically raised and lowered by a hydraulic cylinder that is controlled based on the ground pressure detection result of a ground sensor installed in the seedling planting device, and the sensor ground pressure is maintained within a set range. It is related to rice transplanters.

A rice transplanter with this configuration has the characteristic that the propulsion wheels at the front of the machine come into contact with the tiller at the center of the left and right sides of the machine, allowing it to move straight without being affected by the left-right inclination of the tiller or the difference in unevenness between the left and right sides. However, there was a problem in that the stability of the aircraft in the left-right direction decreased when the load on the central tower became large due to a reduction in the support share of the aircraft's load by the float. For example, if the center turret suddenly climbs onto a shallow part of the plowing platform and the rear of the aircraft is pushed up, the weight supporting the aircraft by the float decreases and the center turret takes more of the load, which causes the left or There was a risk that the aircraft would tilt significantly to the right.

An object of the present invention is to eliminate the drawbacks peculiar to the rice transplanter having the above configuration.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, aspects of implementation that have not yet been invented will be described based on illustrative drawings.

1 #flf Rice Plant Il, as shown in Figure 1, the front traveling body is composed of the engine (l), the mission case (21), and seven propulsion wheels (3) located in the center of the left and right, and this traveling body Seedling planting device 111 for planting the rear KN rows of
ft41, equipped with a driver's seat (6) and a control handle (@), connect the rear S aircraft, and rotate the control handle fil to align the front traveling aircraft with the vertical axis t relative to the rear aircraft.
P) The structure is such that the aircraft is oriented by bending and rotating around the aircraft.

The rear fuselage has seven rod-shaped fuselage (7) that swings up and down using the front end as a fulcrum in the center of the left and right of the fuselage, and the left and right Ilj of the fuselage
On the side, a pair of machines (8) and (8) that swing up and down from side to side with the front end as a fulcrum extend downward from the seedling planting device (4), and the central tower body (f7) Fi single-acting type The left and right tower bodies 180 (8) are each configured to be swing-driven by separate single-acting hydraulic cylinders (91).

At the bottom of the seedling 11 attaching device (4), there are a pair of side floats (a river float and seven center floats for leveling the planting areas of each row on the left and right sides). (11 and 11 are respectively mounted so as to be able to swing up and down about their rear fulcrums, and the center 70-021 is used as a ground sensor for the height side fence of the seedling planting device (4), and this sensor 7
KII to maintain the ground pressure f:R within a certain range.
A mechanism is provided to automatically control the raising and lowering of the fJ writing bodies (7) and (8).

FIG. 3 schematically shows a file of the automatic lift control mechanism, in which the rear part of the sensor flow tie is pivoted to one end of a bell crank which is pivoted to the fixed frame part of the seedling planting device (4). The other end of this bell crank Os is linked to the control pulp I for both hydraulic cylinders (9 and troll), and F is connected to the link link mechanism.
i A round spring #- is provided which biases the bell crank a field and elastically presses the rear fulcrum of the sensor 70-toe in the direction of the ground contact force. And sensor 70
- When the ground pressure and the tension of the spring g are balanced within the set range, #'i the control pulp a- is held neutrally;
When the ground pressure of the sensor 70-to increases, the pulp Q4 is operated against the spring Il@ to move the tower body f711fi+ to the lowering side m.
, and when the sensor float ground pressure becomes lower than the setting*, the pulp 041 is operated with the force of the spring 9 fathom, and the oar body i is
711181 so as to control the free rise of the seedling planting device (4) by maintaining the ground pressure within a set range KM, thereby keeping the height of the seedling planting device (4) with respect to the field 13K substantially constant. .

Is this the basic configuration of the elevation control mechanism?
1vc, both hydraulic cylinders 19'l l (The following improvements have been made to the turret circuit.

That is, both the hydraulic cylinders I9゛1.- are connected in parallel to the secondary boat of the control pulp α fathom, and in the branch oil path to the hydraulic cylinder (9) of the central tower body (7), A check valve 01 is interposed to stop the flow from the visiting hydraulic cylinder (9) to the branch point side, and the hydraulic cylinder (9)
The spool aI depends on the balance between the internal pressure and the internal spring αη.
A valve #1 is provided which is configured to shift l'ik and prevent the cylinder internal pressure from increasing beyond a set value.

According to the above 4I configuration, the hydraulic cylinder (
9), pressure oil can flow from the palgu only when its internal pressure is lower than the set value and lower than the internal pressure of the hydraulic cylinders of the left and right hammer bodies (8). Therefore,
When the rear fuselage load is relatively small and the internal pressure of the central tower hydraulic cylinder (9) is below the set value, both hydraulic cylinders (9) support the rear fuselage load equally, and when the rear fuselage load is large. Now, the internal pressure of the hydraulic cylinder (9) for the central tower rises to the set value and is held there, while the internal pressure of the hydraulic cylinders for the left and right towers rises above the set value and The load sharing by (8) and (8) is the central tower body (
It will be more than the load sharing in 7).

The weight of the machine and parts depends on the amount of seedlings loaded into the seedling planting device (4), the amount of spare seedlings, the backward tilting moment of the machine due to the reverse torque from the propulsion wheels (3), and the weight of the driver. ′
R young, this is 70 groups + 1111H and 1 body 17
Shared support is provided by 11181.

In addition, the control pulp rJ4 is also linked to a manual lever, and when traveling for planting, the lever is switched to tIItK, and the pulp O fathom is operated only by the sensor 70-t0 by switching the lever to tIItK and setting it at t3. Also, lever 1
When the lever is switched to the tN) position, the pulp lever is directly operated by manual operation force regardless of the sensor 70's position, and the tower body 171 It81 is driven downward, and the lever is held at the tN) position. By keeping it in place, you can obtain a neutral lock state for lifting and lowering.

Also, the spool end of the intermediary aα casting is attached to the planted clutch lever.
The spool (1g4) can be freely shifted at the value clutch engagement position (fX), and the spool I is pulled out against the spring (Iη) at the clutch latch disengagement position (Y), and the central turret body At the same time, the pressure oil supply to the hydraulic cylinder (till) is interrupted, and the drain oil from the cylinder (9) is
It is configured to enable

Therefore, when changing power in the field or moving backwards by disengaging the planting clutch, or when driving on the road, the left and right turrets 11 It8) and the float group i+111-1 or the left and right turrets 18111 are used.
The rear load of the fuselage is supported only by the 8+, and the fuselage is stabilized in the left-right force direction.

The central tower body (7) is lightly biased by a spring in the direction of upward swinging, and as mentioned above, when the vehicle is running with the clutch disengaged, the planting is automatically pivoted upward and retracted. In addition, when traveling on the road, it is preferable to equip the left and right towers (8) with wheels (22) as shown by the imaginary lines in FIG.

As explained above in the embodiment, the rice transplanter based on the unreleased #J has a pair of turrets (8 and 8 ) is arranged so as to be able to be raised and lowered by a hydraulic cylinder, and the hydraulic pressure, .
A valve mechanism (I) is provided to keep the internal pressure of the cylinder (9) below a set value, and a hydraulic cylinder for raising and lowering the left and right tower bodies (8) is connected to the upper side of this valve mechanism. In addition, it is characterized by being provided with a check valve that prevents pressure oil fIt# from flowing from the hydraulic cylinder (9) of the central tower body (7) to the hydraulic cylinders for the left and right tower bodies. During the planting run, the rear load of the aircraft can be stably supported by the Fi70-to group Hl021 and the central and left and right tower bodies (7 and 8), and the seedling planting device (4) can be pushed up or floated. In such a case, the load sharing of the central tower f71 is automatically kept constant, and the other parts are distributed to the left and right towers 18.
) and (8), the front propulsion wheel (3
) and this left and right tower body 181' +81, the aircraft was able to be supported in a three-point grounded state, and it was possible to prevent sideways tilting and overturning, greatly improving safety.

[Brief explanation of drawings]

Figure rfJ illustrates an embodiment of the rice transplanter according to the present invention,
2 is a plan view, FIG. 4JS8 is a perspective view of the control mechanism, and FIG. 4 is a hydraulic circuit configuration diagram. (3) Propulsion wheel, (4) Seedling planting device, (7) Central tower, (8) Old...
Left and right tower bodies, (91... Hydraulic cylinder, equipment...
...Hydraulic cylinder, Qt...Reversible valve, or...
・Valve mechanism.

Claims (1)

[Claims] If a small propulsion wheel (31) is installed on the left and right center of the 10 fuselage, a seedling planting device (4) with parallel tilting wheels (4) is connected to the rear of the fuselage 11, and this seedling planting The tower body (7) provided at the lower right and left center of the attachment device (4) is automatically raised and lowered by a hydraulic cylinder (9) that is controlled based on the ground pressure detection result of the ground sensor installed in the seedling planting device fili41. Sensor II! is configured to maintain ground pressure within a set range, and the central tower body (
A pair of mallet bodies (8) and (
8) is arranged for lifting or lowering by a hydraulic cylinder, and in the oil path to the lifting hydraulic cylinder 19+ of the central tower body (7),
A valve mechanism ant is used to maintain the internal pressure of the hydraulic cylinder (9) below a set value, and a valve mechanism 11
A non-return check that connects the lifting hydraulic cylinders of the JKm left and right tower bodies (8) and prevents the flow of pressure oil from the hydraulic cylinder tS+ of the central tower body (7) to the front left and right tower hydraulic cylinders aQl. A rice transplanter characterized by being equipped with a bento-Q appetizer.