JPH01157302A - Controller for plowing depth of rotary tiller - Google Patents

Abstract

PURPOSE:To eliminate a difference in control accuracy regardless of a change in plowing depth setting, by enabling a change in position of a rocking shaft center of a ground contact cover for sensing plowing depth in the vertical direction. CONSTITUTION:The first cover 5 is vertically rocked relatively to the second cover 6 by a change in plowing depth and the change in angle thereof is sensed by a potentiometer 8. Based on the sensing, a lift cylinder is automatically operated to keep the plowing depth at a constant value. When an operating tool (16a) is operated to change the set plowing depth, an electrically operated motor (M) is driven to change the position of the second cover 6 by a guide part (7a). The rocking shaft center (P) of the first cower 5 is moved relatively to tillage rotary tines 11. Thereby the mounting angle in which the ground contact cover is in the standard state can be kept at a constant value without any change in control accuracy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a drive mechanism for raising and lowering a rotary tiller with respect to a traveling machine body, and a rotary rear part that is attached to the rotary tiller so as to be able to swing up and down. A tillage depth control device for a rotary tiller, in which the grounding cover and the operating section of the drive mechanism are linked to each other so that the drive mechanism is automatically operated so that the mounting angle of the grounding cover with respect to the support member is within a set range. .

[Conventional technology]

The above-mentioned rotary tiller is configured so that regardless of the longitudinal inclination of the traveling machine body, work can be performed while maintaining the tilling depth almost constant due to the above-mentioned linkage between the ground cover and the drive mechanism operating section. .

Conventionally, in this seed mouth-chestnut cultivator, for example,
As shown in JP-A No. 0-49704 and JP-A-62-236403, a mechanism is provided to change the interlocking relationship between the ground cover and the drive mechanism operating section, so that the actual plowing depth becomes the desired plowing depth. The plowing depth may be set by adjusting the changing mechanism so that the drive mechanism is in a neutral state with the installation angle of the ground cover at or close to the angle of , or the actual plowing depth A potentiometer is provided to detect the grounding depth based on the swing angle of the grounding cover, and the drive mechanism is automatically operated so that the plowing depth detected by the potentiometer is the same or almost the same as the plowing depth set by the plowing depth setting device. The plowing depth is set by adjusting the plowing depth setting device so that the plowing depth set by the plowing depth setting device becomes a desired plowing depth.

[Problem that the invention seeks to solve]

In the conventional case, the height position of the ground cover swing axis relative to the tilling rotary does not change regardless of changes in the tilling depth setting, and the drive mechanism differs depending on whether the tilling depth setting is shallow or deep. The installation position when operated in the neutral state, that is, the cover installation angle when the grounding cover is in the standard installation position, will be different, and as a result, the actual plowing depth will change when the plowing depth setting is shallow. The ground cover angle that changes as the unit depth changes is different from the ground cover angle that changes as the actual plowing depth changes when the plowing depth setting is increased. Control accuracy was different between shallow and deep cases.

An object of the present invention is to control tilling depth while eliminating differences in control accuracy regardless of changes in tilling depth settings;
The purpose is to make the structure easy to obtain.

[Means for solving problems]

The characteristic configuration of the present invention is that, in the plowing depth control device of the rotary tiller that has been purchased, the supporting member is attached so as to be able to change its position in the direction in which the pivot axis of the ground cover moves up and down with respect to the tilling rotary. Its functions and effects are as follows.

[For production]

When the mounting position of the support member is changed, the pivot axis of the grounding cover moves up and down with respect to the tilling rotary, and the grounding with the grounding cover in the standard mounting position where the drive mechanism is operated to the neutral state. While the mounting angle of the cover relative to the support member does not change, the distance in the vertical direction between the free end side grounding part of the grounding cover and the lower end of the tilling rotary when the grounding cover is in the standard mounting position changes. can. That is, the set plowing depth changes by changing the mounting position of the support member.

〔Effect of the invention〕

The plowing depth setting can be changed by changing the position of the support member, and with this plowing depth setting means, the mounting angle of the grounding cover in the standard mounting posture can be maintained constant regardless of changes in the plowing depth setting. As a result, the tilling depth can be improved with the same control accuracy whether the tilling depth is shallow or deep.

Furthermore, unlike the conventional tillage setting means, there is no need to provide a special correction means for avoiding changes in control accuracy due to changes in tillage depth setting, which is advantageous from a structural and economic point of view.

〔Example〕

Next, examples will be shown.

As shown in FIG. 3, a rotary tiller (3) is connected to the rear of the wheeled traveling machine so that it can be raised and lowered by a hydraulic lift cylinder (1) via a link mechanism (2), and the rotary tilling device (3) is The tilling device (
3), and a riding type rotary tiller is constructed.

In the tilling device (3), as shown in FIG. It is attached to the cultivating device body (7) via a second cover (6) so as to be grounded. As shown in FIG.
) and the electromagnetic control valve (V, ) of the lift cylinder (1) via the valve operation circuit (10) to maintain the plowing depth the same or almost the same as the set plowing depth regardless of the longitudinal inclination of the traveling machine. This allows you to work while you are working.

That is, as the depth of tillage by the tiller (11) changes, the first cover (5) swings up and down relative to the second cover (6) in order to ground the tiller and lower the tiller; The mounting angle of the first cover (5) with respect to the second cover (6) is detected by a potentiometer (8), and the detected mounting angle is electrically extracted. and,
Koufuka side? The l1 mechanism (9) automatically outputs a signal to the valve operation circuit (10) to operate the control valve (V,) to the ascending or descending drive position or stop position based on the information from the potentiometer (8). As a result, the lift cylinder (1) is automatically operated so that the mounting angle of the first cover (5) with respect to the second cover (6) falls within the set range.

As shown in FIG. 1, the second cover (6) can be repositioned in the circumferential direction along the periphery of the tilling rotary (11) for the guide part (7a) of the tiller body (7). and is mounted so as to be adjusted in position by an electric motor (M) interlocked via an interlocking link (12) and a driving movement link (13), and a motor drive is connected to this electric motor (M). A tilling depth setting device (16) is linked via a circuit (14) and a tilling depth setting mechanism (15), and the tilling depth can be set by adjusting the tilling depth setting device (16) using the operating tool (16a). It's like making changes and adjustments.

That is, when the mounting position of the second cover (6) is changed, the swing axis (
P) moves up and down with respect to the tilling rotary (11), and the first cover (5) is in the standard mounting position where the tilling depth control mechanism (9) stops the lift cylinder (1). The free end side grounding part of the first cover (5) and the tilling rake (
11) The distance from the lower end of the fuselage in the vertical direction changes. The electric motor (M) is equipped with a potentiometer (not shown) that detects this interval based on the rotation angle of the electric motor (M) and electrically takes out the detection result. Then, the operating tool (lla) is rotated and the plowing depth setting device (
16) When the set plowing depth is changed in step 1c1, the plowing depth setting mechanism (15) outputs an operation signal to drive the electric motor (M) in forward rotation, reverse rotation, or stop. An electric motor (
M) is to be operated automatically. In other words, the tilling depth setting mechanism ( 15
) is adapted to operate the electric motor (M) to adjust the mounting position of the second cover (6).

Note that the flow path switching valve (17) shown in FIG. When the driving load of the flow priority valve (20) (20a) and the trolling cylinder (19) exceed the set value, the control flow port (20a) of the flow priority valve (20)
) connection oil line (21) with the control valve (v2)
is automatically connected to the connection oil passage (22) between the surplus flow port (20a) of the flow priority valve (20) and the control valve (■,), and the control flow port (20a)
) to the lift cylinder (1).

[Another example]

Instead of the lift cylinder (1), various types of actuators such as electric type may be employed, and these are referred to as a drive mechanism (1), and the control valve (V,) is referred to as an operating section (vl).

This operating section and the first cover may be mechanically linked.

The first cover (5) may be attached to the cultivating device body via a member dedicated to attachment thereof, and the second cover (6) is referred to as a support member (6) of the first cover (5).

The mounting position of the support member (6) may be changed using manual power.

Various actuators such as cylinders may be used instead of the electric motor (M), and these are referred to as a drive mechanism (M).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the tillage depth control device for a rotary tiller according to the present invention, in which Figure 1 is a partially cutaway side view of the tiller, Figure 2 is a hydraulic circuit diagram, and Figure 3 is a rear view of the rotary tiller. FIG. (1), (M)... Drive mechanism, (3)...
...Lower tillage device, (5)...Grounding cover, (6)...Supporting member, (11)...
・・Cultivation Rokuri, (vl) ・・・・Operation unit, (P
)...Rotation axis center.

Claims (2)

[Claims] 1. A drive mechanism (1) is provided to raise and lower the rotary tiller (3) relative to the traveling machine, and support for a rotary rear grounding cover (5) attached to the rotary tiller (3) so as to be swingable up and down. The ground cover (5) and the drive mechanism (11) are placed in a state where the drive mechanism (11) is automatically operated so that the mounting angle with respect to the member (6) falls within the set range.
) is a tillage depth control device for a rotary tiller that is linked with an operation part (V_1) of a rotary tiller, in which a swing axis (P) of the ground cover (5) moves up and down with respect to a tillage rotary (11). A tillage depth control device for a rotary tiller, in which the support member (6) is attached so as to be freely changeable in position. 2. The support member (6) is connected to a drive mechanism (M
) The plowing depth control device according to claim 1, which is interlocked with the plowing depth control device.