JPS59169405A - Lift controller of agricultural machine for rice field - 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 present invention relates to a lifting control device for a rice field agricultural machine. , a ground pressure sensing body that is grounded on the soil surface and moves up and down, and an agricultural machine that can be moved up and down by moving the running wheels of the running vehicle body up and down using a hydraulic device, or directly through up and down movement links. The switching valve of the hydraulic system is switched in response to changes in the ground pressure of the sensing body to substantially move the agricultural machine up and down, so that the ground pressure of the sensing body is always maintained within an appropriate range of ground pressure. The composition was well known. In addition, the standard setting pressure of the sensor has already been adjusted according to the hardness or softness of the soil surface, and the sensitivity has been adjusted to an appropriate level during work.

However, when working on muddy water in a paddy field at high speed, the floating blade becomes large, and conversely, when working at low speed, the floating blade becomes small. Even if the sensitivity is adjusted to the appropriate level by considering the The drawback was that it was not possible to work on curved surfaces.

That is, in the case of a rice transplanter, floating seedlings may occur or, conversely, the seedlings may be planted too deep, and in the case of a seeding machine, the seeding depth may not be constant, resulting in uneven germination.

This invention abandons the following technical means for the purpose of solving the above-mentioned drawbacks.

That is, a sensitivity changing device @ (c) is provided to adjust the ground pressure sensitivity of the sensing body (a), and the speed change device and sensitivity changing device θ■ of the traveling vehicle body (1) are designed to desensitize the sensitivity at high speeds and reduce the sensitivity at low speeds. This is a lifting control device for paddy field agricultural machinery that is interlocked to make it more sensitive.

One embodiment of this invention will be described in detail based on the drawings (1
) is a passenger-type traveling vehicle, with an engine stand (3) attached to the front of the traveling gearbox (2), and a prime mover (
The base of the chain case (4) is fixed to the left and right sides of the running gear and box (2) so as to face rearward and downward, and the rear wheel (5) is attached to the rear end (not shown). 5) is supported on the shaft. Further, front wheels (6), (6) are attached to the lower portions of the left and right sides of the engine stand (3). (7) is a bonnet that covers the engine. (8) is the control handle;
(9) indicates the main thalassotip petal, and 0 port indicates the throttle lever. 01) is a speed change lever, which is interlocked with the transmission in the traveling gear box (2), and this speed change lever 0
1) can be operated in an H-shape in plan view, and the H-shape guide groove α in Fig. 3
It is designed so that when the part (A) is operated, the speed is changed to a low working speed, when it is operated to the (B) part, the speed is changed to a high working speed, when the part (R) is operated, the speed is changed to road running speed, and when the part (D) is operated, the speed is changed to reverse speed. It is being

θ■ is the pilot's seat, and the left and right chain cases (4), (
4) are connected by the mouth frame ◇→ when viewed from the back, and are supported on the upper part of this.

ao indicates a hydraulic operating lever, and aQ indicates a planting clutch lever. 0η is a step platform.

08) is a reinforcing pipe that connects the left and right chains,
) and (4).

0 is a protruding frame, the base of which is fixed to the reinforcing pipe.

(A) is an agricultural machine, and in the illustrated example, a rice transplanter is used as an example, or it may be a commonly known seeding machine.

The rice transplanter in the example shown in the figure has a seedling tank (A) supported on the top of the planting gear box (QI) that moves back and forth horizontally from side to side, and seedlings are separated and planted in batches from the seedling tank (A) at the rear. A seedling planting rod (C) is attached, and the rear part is pivoted to the planting gear box (21) at the lower left and right center, and the front part is freely movable up and down. Float) and side flows 1112 (C) on both left and right sides of the center float (C).
It is installed in the same way as c).

In addition, the front part of the center float (c) should be removed with a handle of ¥4? As shown in Figures 4 and 5, the claw side support is attached to the support frame (C) that protrudes from the front of the planted gear box button by means of a letter-shaped link (C) that can be freely connected to the support frame (C). The link rod (28a) pivotally attached to the frame (A) side is extended toward one side.

(A) is an elevating link, with upper link (7) and lower link 0.
The base of υ is pivotally connected to the protrusion frame 09), and both shafts work, 0
Pivotally connect the rear part of the main body with a joint link C32), and connect this joint link 0
The planting gear box i2) of the rice transplanter is attached to the wharf via a rolling connector (g).

(B) is a hydraulic system in which the base of a hydraulic cylinder (7) is pivotally connected to a traveling gear box (2), and a hydraulic piston (7)
An arm (b) with a claw integrally attached to the upper link (1)
There is a claw on the top, and when the piston (1) protrudes, the lower link (G) is stopped and the rice transplanter (A) is raised.

(c) is an oil [switching valve], the case (38a) is pivotally connected to the support frame (sha) with a pin (to), and the switching rod (3, ab) is pivotally connected to the central float (c). , G is provided so that the hydraulic piston of the hydraulic device (b) can be moved in and out by the hydraulic circuit shown in FIG. In the circuit shown in Figure 5, θO is the pump, θ1) is the tank, and 0 or 0 is the relief valve.

In other words, when the center float (C) is moved further up from the appropriate height for planting the seedlings, the valve (C) is switched so that the piston (1) protrudes, and when it is moved down, the piston (1) is retracted. ing.

(Incorporated) has a sensitivity change device with a spring ■ attached to the extension part (28b) of the link rod (28a) of the dogleg-shaped link (c).
quoting, this spring 0 → the gear shift lever 0]
) of the H-shaped guide groove (2) and rotates by intervening between the pi) and (b) portions <-(46)! In the fourth row, the boat wire (16) is connected and moved, and when this wire (16) is pulled, the tension of spring 04) becomes stronger and the central float (c) is strongly pushed down to the soil surface, and when it is loosened, it is weakly pushed down to the soil surface. It's like it's going to be shot down. That is, when the tension of the valve branch is made stronger, the switching force (38b) of the valve branch is required to move twice and the sensitivity becomes dull, and when the tension is made weak, the sensitivity becomes sensitive. [Phase] η is the pivot shaft of the lever (c).

The lever (c) is interposed between 'ff1 H-shaped guide groove a) to (b) in Fig. 3, and the gear shift lever 0 is set to the (opening) side, which is the high working speed side. - When operated, the lever (c) rotates as shown in the imaginary line to pull the wire (I6) and increase the tension of the spring (b).

Next, to explain the operation of the upper part in detail, seedlings are placed in the seedling tank (A), and each part is rotated by transmission without running the traveling vehicle body (1). Seedlings are separated one by one from the seedling tank (A) in which the seedling planting rod (C) moves back and forth from side to side while being towed with the side floats (A) and (A) floating on the soil surface. When the rice transplanter (A)'s central float (C) sinks or rises from the soil surface due to unevenness of the tiller, the rice transplanter (A)'s center float (C)
The ground pressure of the side floats (E) and (C) increases or decreases. Then, when the ground pressure increases and the center float (A) moves upward significantly, the hydraulic switching valve (to) moves to the piston (1).
The rice transplanter iw is moved upward by the lifting link (e) by switching it so that it protrudes. When the ground pressure of the central flow l-(c) becomes appropriate, the hydraulic switching valve (c)
is returned to neutrality.

Conversely, when the ground pressure decreases and the center float (C) moves significantly downward, the hydraulic switching valve (C) switches so that the piston (G) can retract, and the machine (E) moves downward due to the weight. When the ground pressure reaches the appropriate state, the hydraulic switching valve □ returns to neutral (□).In this way, the rice transplanter (A)
The seedling planting work is carried out while being towed and automatically controlled to raise and lower.

However, when planting seedlings, the work speed is high when the field is shallow or when the driver is an experienced driver. Conversely, when the field is deep or the driver is inexperienced, work at low speeds. At this time, when working at high speed, the central flow is inevitable)H
In this embodiment of the present invention, when the gear lever θ1) is operated to the high speed side (B) position, Operate the lever (c) to the state shown by the imaginary line in Figure 3, and connect the wire 00.
Increase the tension of the spring 0 through . Therefore, the upward movement resistance of the central float (A) increases, preventing the float (C) from moving upward unnecessarily and preventing the formation of floating seedlings.

Conversely, the tension of the spring 0→ is weakened through the lever (c) and the wire GI6), which moves the gear shift lever (]]) to the low-speed position (a), and the center float (c)
The upward movement resistance of the kneading machine is reduced, and the movement is carried out smoothly without any unnecessary running resistance, and only mixed kneading is performed, and accurate upward and downward control is performed.

In addition, although the example explained the case where the rice transplanter is a working machine,
The same applies to seeding machines, in which seeds are sown shallowly under the soil surface when operating at high speed, and deeper when operating at low speed. Can be sown at depth.

In addition, in the embodiment, the tension of the sensitivity adjustment spring (441) was changed by the speed change lever <-(1υ), but as shown in Fig. 7, it was linked with the throttle lever αQ, and the prime mover was rotated at high speed with the throttle lever OQ. It is also possible to make the sensitivity less sensitive when working at high speeds and to make it more sensitive when working at lower speeds.Furthermore, apart from the embodiment, the running wheels can be raised and lowered by a hydraulic device like a walk-behind rice transplanter. Of course, it may also be in the form of

Second, since this invention has the above-mentioned configuration, it is possible to solve the conventional drawback that work is performed with a tendency to rise or sink due to speed change between high-speed work and low-speed work. At any working speed, the working machine can be accurately controlled to raise and lower to perform accurate work.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a plan view of the main part, Fig. 4 is a side view of the main part, and Fig. FIG. 5 is a plan view of FIG. 44, FIG. 6 is a hydraulic circuit diagram, and FIG. 7 is a simplified side view of the system when it is tilted on its side. Symbols in the diagram (1) are the running vehicle body, 0]) is the gear shift lever, (
1) indicates an agricultural machine (rice transplanter), (c) indicates a ground pressure sensor (center float), (Foundation) indicates a hydraulic system, and θ■ indicates a sensitivity change device. Patent applicant name: Iseki Agricultural Machinery Co., Ltd. Representative: Masa Takashi Iseki Figure 3, 2nd page

Claims (1)

[Claims] Agricultural work such as rice transplanters and seeding machines that are essentially moved up and down by a hydraulic device and a ground pressure sensing body that is grounded on the soil surface and can move up and down on a transmission-controlled vehicle body that is shifted by an appropriate means and runs. When the ground pressure of the sensing body changes higher than a certain pressure, the running wheels are lowered or the agricultural machine is directly raised to reduce the ground pressure, and when the ground pressure changes below a certain pressure, the machine starts running. In the device for increasing the ground pressure by raising the wheels or lowering the agricultural machine and maintaining the ground pressure at an appropriate constant pressure, a sensitivity changing device is provided for adjusting the ground pressure sensitivity of the sensing body, and the ground pressure of the traveling vehicle body is increased. A lifting control device for a paddy field agricultural machine, in which a transmission and a sensitivity changing device are interlocked and connected so that the sensitivity becomes insensitive when operating at high speed and becomes sensitive when operating at low speed.