JPH0624445B2 - Tilling depth control device - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling depth control device, and in particular, it can be applied to a tractor such as a rotary tiller that connects a ground working machine.

[Prior art]

The conventional tillage depth control device detects the tillage depth based on the vertical rotation of the rear cover whose rear edge contacts the ground, and the detected tillage depth value matches the tiller depth set value set by the tiller depth setter. As described above, it is known that the ground work machine is moved up and down, or the upper cover that covers the upper part of the cultivated body is rotated in the front-back direction when adjusting the working depth.

[Problems to be Solved by the Invention]

In the above-mentioned conventional tillage depth control device, since the rear cover functions as a tillage depth sensor, the rear cover is such that it is in slight sliding contact with the ground surface, and therefore has almost no effect of averaging the cultivated soil surface and the unevenness of the finished surface is large. . Therefore, there is a technical problem to be solved in order to have a leveling action and to be able to quickly reach the set working depth, and the present invention aims to solve the problem. To aim.

[Means for Solving the Problems]

The present invention has been proposed in order to achieve the above object, the ground work machine is connected to the tractor by the work machine connection mechanism so as to be able to move up and down, and the cultivator body is covered with a cover.
At least part of the cover is configured to be rotatable in the front-rear direction, the rotating cover is configured to be rotated by an actuator, and a detector for detecting the operating position of the actuator is further provided. Has been
A cultivator setting device for determining the cultivating depth by the cultivating body is provided, and when the cultivating setting device is operated, the position at which the rotating cover should be maintained is calculated, and until the detected value by the detector matches the position. A tilling control device is provided, which is provided with a control means for moving the cover.

[Action]

When the tilling depth setting value is set by the tilling depth setting device, the control unit first moves the cover to a predetermined rotation position to hold the cover at this position. Can be sufficiently leveled, and in this way, the turning position of the cover is first determined and held at this position, so that the plowing depth set value can be quickly controlled.

【Example】

An embodiment of the present invention will be described below in detail with reference to the attached drawings. As shown in a side view in FIG. 1, the ground work implement 2 is connected to the tractor 1 by the work implement connection link mechanism 5 including the lower links 3 and 3 at the lower left and right and the top link 4 at the upper center, and the hydraulic lifting The left and right lift arms 9 and 9 that move up and down in accordance with the movement of the lift piston 8 of the lift cylinder 7 of the mechanism 6 are connected to the left and right lift rods 10 and 10.
Which is connected to the lower links 3 and 3 via
For automatic tilling depth control, the tilling depth set value set by the operator using the tilling depth setting device I made up of something like a volume,
Until the working depth of the ground work implement 2 becomes the same, the on / off operation command of the ascending solenoid valve 11 or the descending solenoid valve 12 is sent from the control unit 13 configured by a microcomputer or the like to the ascending drive unit. It is provided so as to be amplified and output via the drive unit 14 or the driving unit 15 for lowering. A rear cover 17 for covering the rear of the tiller 16 of the ground work implement 2 is pivotally supported on the drive case 18 of the ground work implement 2 and side stays on the left and right sides using fulcrum pins 19 so as to be vertically rotatable. , The piston 21 of the rear cover cylinder 20
The rear cover 17 can be rotated up and down by the movement of the rear cover 17, and a plurality of ground sensors S are provided at the rear edge of the rear cover 17.
₁ in the left-right direction and the rear edge of the rear cover 17 is at the grounding position, the grounding sensor S ₁ is operated by the operator 22 of the grounding sensor S _1.
The rear cover sensor S is constructed so that it is grounded and its normally open contact is turned on, for example, and the vertical turning position of the rear cover 17 of the ground work machine 2 is configured by using a linear sliding type potentiometer. _When the operator operates the tillage depth setting device I to specify the tilling depth setting value, the rear cover 17 should be kept when the tiller 16 is located at this tilling depth setting value. The moving position is calculated by the control unit 13, and the rear cover 17 is set at this turning position.
Command of the control unit 13 so that the
Alternatively, the ascending solenoid valve 2 is moved through the descending drive unit 24.
5 or the lowering solenoid valve 26 is turned on and off, whereby the piston 21 of the rear cover cylinder 20 is configured to move in and out, and subsequently, the majority of the ground sensors S ₁ are turned on. To the position
The control unit 13 outputs an operation command from the control unit 13 to the hydraulic lifting mechanism 6 so that the ground work implement 2 moves up or down.
Is configured. Next, although the ground work machine 2 shown in FIG. 4 in a side view does not correspond to the embodiment of the present invention, it will be described because it is related to the present invention. In the figure, the left and right lift rods 10 of the working machine connection link mechanism 5 are formed by lift rod cylinders 23, and the lift rod cylinders 23 are controlled to expand and contract based on commands from the control unit 13. , A configuration in which rolling control is performed so that the cultivated body 16 of the ground work implement 2 is always parallel to the ground surface regardless of the left-right inclination of the tractor 1, and is constantly pushed toward the ground surface. the trailing portion left of the rear cover 17, Fig. 5 - respectively one or more of the ground sensor S ₁ provided as illustrated in FIG. 7, the left and right respectively ground sensor S ₁
The control unit 13 is configured to control the expansion and contraction of the lift rod cylinder 23 so that the actuators 22 of FIG. Actuator 22 of the ground sensor S ₁
Since the ground is grounded, the inclination with respect to the ground surface can be detected quickly, and hunting is prevented from occurring in rolling control such as a normal weight-type or level-type inclination sensor attached to the ground work implement 2. It has the advantage. As illustrated in FIG. 8, the extension covers 24, 24 are provided on the left and right portions of the rear cover 17 so as to project.
4, the ground sensor S ₁ may be attached to each of them, or the expansion covers 24, 24 themselves may be configured as ground sensors.
Further, although the rear cover 17 and the rear cover cylinder 20 have been described in the above embodiment, the present invention should not be limited to these.

【The invention's effect】

Since the present invention relates to the configuration as described in detail in the above-mentioned one embodiment, when the tilling depth setting value is set by the tilling depth setting device, first, the controller moves the cover to a predetermined rotating position, and Since the cover is held at the position, the surface of the cultivated soil can be leveled sufficiently by the cover, and the turning position of the cover is fixed and held at this position. Will be promptly controlled. Further, the cover is automatically moved only by operating the working depth setting device, and since the moving position is interlocked with the working depth setting device, the working depth adjusting operation can be performed easily and quickly. You can

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIGS. 1 and 4 are side views of the respective embodiments, FIG. 2 is a control circuit diagram, and FIGS.
FIG. 8 is a perspective view of the respective embodiments of the rear cover.

[Explanation of symbols]

1 ... tractor, 2 ... ground work machine 5 ... work machine connecting link mechanism 6 ... hydraulic lifting mechanism, 13 ... control unit 16 ... tiller, 17 ... rear cover 20 ... rear cover cylinder I ... plowing Depth setting device, S ₁ …… Grounding sensor S ₂ …… Rear cover sensor

Claims (1)

[Claims] 1. A ground work machine is connected to a tractor by a work machine connecting mechanism so as to be able to move up and down, a cultivating body is covered with a cover, and at least a part of the cover is configured to be rotatable in the front-rear direction. , The rotatable cover is configured to be rotated by an actuator, and further includes a detector for detecting an operating position of the actuator, and a tiller setting device for determining a tilling depth of the tiller is provided. When the plowing setter is operated, a control means is provided for calculating a position where the rotating cover should be kept and moving the cover until the detected value by the detector coincides with the position. A tilling control device characterized by the above.