JPS6185109A - Running apparatus of 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 Field of Industrial Application The present invention relates to a traveling device such as a rice transplanter, and can also be applied to a seeding machine, a fertilizer application machine, etc.

Problems to be Solved by the Invention In machines such as rice transplanters that carry out rice planting work while running on paddy soil with a soft running surface, the soil tiller changes from shallow to deep, and the soil changes from hard to soft. Because it is easy to move, it is common to make the traveling axle and the working device that is propelled over the soil surface move up and down so that the working device can be maintained at a constant position on the soil surface. Since conditions such as the soil surface and the plowing surface are constantly changing in a complex manner, it is difficult to maintain a stable position by simply moving the working device up and down.

Means for Solving the Problem The present invention is directed to a vehicle body (
1) A sensor float (3) that changes the relative vertical position of the working device (2) to keep the vertical position of this working device (2) constant with respect to the soil surface, and a sensor float (3) that receives the pressure of the sliding soil surface and is high (if the sensor float c
3) A traveling device such as a rice transplanter is provided with a pitching sensor which is interlocked to rotate the working position of 3) to the forward downward direction and, conversely, to change the rotation to the backward downward direction when the pressure is low. .

Effect of the Invention The working device (2) is towed by the propulsion of the traveling vehicle body (D) and performs a predetermined work on the soil surface on the working device (2). When the pressure on the soil surface becomes high on the sensor float (3) due to the depth of the soil plowing plate, etc., the relative vertical distance between the traveling vehicle body ■ and the work equipment ■ increases due to this pressure detection. controlled so that
The sensor float (
When the pressure in 3) is low, the relative vertical distance is controlled to be low by this pressure detection, and the working device (2) is controlled to always be maintained at a constant position above the soil surface, and
During this action, when the pitching sensor (4) slides on the soil surface and receives pressure, and the working device (2) floats high above the soil surface, the sliding pressure that the pitching sensor (4) receives from the soil surface is Lower the sensor float (
3) The sliding attitude of the sensor float (3) is rotated to the backward downhill side, and the attitude is changed to increase the angle of attack with respect to the direction of movement of the sensor float (3), so the pressure change due to the soil surface of the sensor float (3) can be detected. The pitching sensor (4) becomes insensitive and increases the contact pressure of the sliding soil surface, and when the working equipment sinks deep into the soil surface, the sliding pressure of the pitching sensor (4) with the soil surface increases, The attitude of the sensor float (3) has been changed to reduce the angle of attack, and the detection of pressure changes due to the soil surface has become more sensitive. , running vehicle body ■
and the work equipment ■ are maintained in appropriate working postures according to changes in the running soil.

Effects of the Invention In this way, the pitching sensor (4) automatically adjusts the soil pressure detection sensitivity of the sensor float (3) in controlling the relative vertical distance between the traveling vehicle body (D and the working device ■) using the sensor float ■. Because of this, it is possible to quickly adapt to changes in soil depth, hardness, softness, etc., and maintain a stable working height of the working device [(2).

In addition, as in the embodiment, when the pitching sensor (4) is connected to the rear end of the sensor float (3) so as to be movable up and down under the pressure of the soil, The pitching sensor ■ is in contact with the sliding surface of the sensor float (3), so the pitching sensor (
The pressure detection in 4) is more stable, and since the relationship with the sensor float (3) can be maintained constant, accurate operation control can be maintained.

Embodiment 1 In FIGS. 1 to 4, a front axle (5) and a rear axle (6), which can be freely controlled, are provided on both left and right sides of the traveling vehicle body O) to be driven in conjunction with each other. A prime mover ■ and a control handle (8) are installed on the top, and a pilot seat ■ is installed at the rear. In addition, a removable hitch OO is provided at the rear end of the traveling vehicle body (1), and this hitch O [vertical parallel link rod GJ integrated with Il)Q2
A rice transplanting device, which is a working device (■), is connected via +.

The rice transplanting device is equipped with a sensor float (3) whose rear part is pivoted by a support shaft 09 and whose front end is movable up and down on the lower side of the body (■) which has an internal interlocking mechanism.
3) At the rear end, a pitching sensor (4) having the same shape as this rear end is pivotally supported by a support shaft (2) so that the rear end can move up and down, forming a part of the float. Aircraft ■
A cram is provided above by moving a front-sloping seedling tank head with its upper end positioned upwardly and forwardly in the left and right directions, and a planting rod 0 is installed at the exit of the lower end of this seedling tank 0. It is configured to move up and down in an interlocking manner, and while separating the seeds supplied from tank 0, it slides on the working position of this planting rod 0 part and inserts seedlings on the leveling surface of the float O0 that leveling the area. . This flow 1-(g) is located on both left and right sides of the sensor float (3).

The upper and lower link rods qt+■ are pivoted with the front end on the hitch (g) so that they can move vertically 071ω, and the upper link rod (υ) It is fitted into a long hole (support) and is movable back and forth.
A pitching cylinder (c) that expands and contracts with hydraulic pressure is provided between the axis of the upper link rod 0.1), and the sensor float attached to the fuselage (■) and this via the arm 0 by the expansion and contraction of this pitching cylinder (Ω). 6 (29 is a pitching valve that is switched by a pitching sensor (4), and the rear end of the sensor float (3) The pitching sensor (4) is installed in
) to actuate the pitching cylinder (c).
is configured to be switchable between a neutral position θ, an extended position (4), and a contracted position (c). Pitching sensor (2)
) is in the neutral position 11a when it lies on the same plane as the sensor float (3), is in the shortened position when it rotates upward, and is in the extended position Q when it rotates downward. (2) is a hydraulic pump. The vehicle body (1) and the working device (2) are interlocked.

The upper link rod has an arm (b) and a pitch [phase].
A lifting cylinder (to) that can be hydraulically expanded and contracted is provided between the lower end and axis 0, and the position between the front end of the sensor float (3) and the aircraft body ■ is switched by the vertical movement of the sensor float (3). An elevating valve (to) is provided, and a sensor float O) is inserted between the elevating valve (to) and the elevating cylinder 〇.In the horizontal neutral position, cylinder 0 does not expand or contract, and in the upward rotation position, cylinder 011 is moved. It operates to extend and raise the working device (■), and in the downward rotation position, the cylinder (to) is shortened and the working device (2
The hydraulic circuit is configured to switch so that it lowers.

As the traveling vehicle body ■ runs, the front wheels etc.) and rear wheels (8) roll near the plowing platform to support the machine body, and the working device Il■ slides the float ω, sensor float ■, pitching sensor (4), etc. While supported by.

The seedlings supplied from the seedling tank 0 are planted on the soil surface leveled by the float ω using a planting rod.

When the sensor float ■ is pushed upward above a certain level by soil pressure, the lift valve (to) is switched from the neutral position to the extended position, the lift cylinder (to) is extended, and the work equipment ■ is raised. Float■
The sensor float ■ will move downwards due to its weight, and the lifting valve (to) will be returned to the neutral position again to stop the lifting of this working device (2) and adjust it to the appropriate position for the soil surface. maintain position.

Conversely, if the sensor float ■ moves below a certain level,
The lifting valve (to) is switched from the neutral position to the shortened position, the lifting cylinder (to) is shortened, the working device (■) and this sensor float (■) are lowered, and the ground pressure by this sensor float (■) is increased. The lift valve (to) is then returned to the neutral position, and the height of the work device (2) relative to the soil surface is maintained at a constant level.

During this action, since the pitching sensor ■ is sliding on the soil surface, when the sensor float ■ sinks significantly below the soil surface, the pitching sensor (4) tries to rise just behind the float (3). Pushed up by the soil surface, switch the pitching valve (c) from the neutral position to the shortened position (c).

The pitching cylinder (c) is shortened, and the entire working device rotates upward on the rear end around the pivot (to), so the sensor float (3) is placed in a position that approaches the front end or the soil surface. This makes it easier to detect the pressure on the soil surface. Therefore, this sensor float (■) is moved upward by the pressure of the soil surface, and by switching the lifting valve (to), the working device i
! ■ Control the rise.

Conversely, when the work equipment (■) floats above the soil surface, the pitching sensor (4) moves downward as the suppressing force from the soil surface decreases, so the pitching valve extends from its neutral position. Rank I! When the pitching cylinder (C) is switched to Q, the pitching cylinder (C) is extended, and the rear end side of the work table m moves downward around the pivot (to) part, and this pitching sensor (4) is suppressed by the soil surface. As the force increases, the angle of attack of the sensor float (3) also increases, and as it attempts to slide, the sensitivity of detecting the pressure on the soil surface becomes less sensitive.

This sensor float (2), float (7), etc. will be in a state of sliding while being pressed down to the soil surface.

Next, in the embodiments shown in FIGS. 5 and 6, only the differences from the two sides will be explained.
-000G is used as a rolling sensor, and a rolling valve (B) is installed between the front end of this side float OO and the fuselage ■, and the rolling sensor side of the fuselage ■ and the rear end of the upper link rod A telescopic hydraulic rolling cylinder (to) is connected and provided between the two parts, and the front end of the fuselage is rotatable around a rolling axis ω along the front and back direction with respect to the hitch [F]. When the rolling sensor 00 is moved up significantly due to sliding pressure with the soil surface, the rolling valve (G) is moved to the neutral position (4).
When the rolling sensor Qe moves downward during correspondence, it switches from the neutral position iim to the downward moving position 60.

In addition, the lifting valve (to), rolling valve (b), and pitching valve (c) are placed at each neutral position (c) as shown in Figure 6.
g) They are connected via a 0 circuit, etc., and control operations are performed in the order of the lifting valve (to), the rolling valve (4), and the pitching valve (c).

When the sliding pressure of the rolling sensor ■ on the soil surface becomes high, the rolling cylinder ω is shortened and this side is rotated in the upward movement direction around the rolling axis (toward), and the pressure of the rolling sensor qe becomes low. If so, it is rotated to the opposite side, and the left and right flows 1 to 11G GO evenly slide and press against the soil surface to maintain the parallel sliding of the aircraft O with respect to the soil surface.

[Brief explanation of drawings]

The figures show an embodiment of the invention, with FIG. 1 being a side view of a portion thereof, and FIG. 2 being a hydraulic circuit diagram of a portion thereof. 3 is a side view, FIG. 4 is a plan view, FIG. 5 is a side view of another embodiment, and FIG. 6 is a hydraulic circuit diagram thereof. In the figure, symbol ■ indicates a running vehicle body, ■ indicates a working device, c3) indicates a sensor float, and (4) indicates a pitching sensor.

Claims (1)

[Claims] 1. Change the relative vertical position of the working device (2) with respect to the traveling vehicle body (1) in response to the pressure of the sliding soil surface, and change the vertical position of the working device (2) with respect to the soil surface. A sensor float (3) is maintained to be constant, and if this pressure increases due to the pressure of the sliding soil surface, the sensor float (3)
) is provided with a pitching sensor (4) that is interlocked to rotate the operating position of the holder (4) to the forward downward direction and, when the pressure is low, to change the rotational direction to the rear downward direction. 2. The rice transplanter according to claim 1, wherein the pitching sensor (4) is connected to the rear end of the sensor float (3) so as to be movable up and down under the pressure of the soil. etc. traveling equipment.