JPH05207805A - Tilling depth controlling apparatus for rotary tiller - Google Patents

Abstract

PURPOSE:To easily and quickly shift a rotary cover to a prescribed position by providing a controller for shifting a rotary cover to a position set by a positional setter. CONSTITUTION:An actuator 20 is operated by a controller such as a microcomputer to shift a rotary cover 17 to a position indicated by a positional setter I such as a variable resistor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tillage depth control device for a rotary tiller which is connected to a power farming machine such as a tractor to cultivate soil.

[0002]

2. Description of the Related Art Conventionally, a tilling depth control device for a rotary tiller is constructed so that a lower edge of a rear cover covering the rear of the tiller is slidably contacted with the ground to detect unevenness of the ground. If the rear cover rotates in the direction of decreasing the working depth, the hydraulic lifting mechanism is operated downward to lower the entire rotary tiller, and conversely, the rear cover rotates in the direction of increasing the working depth. Then, the hydraulic lifting mechanism is actuated to the ascending side to raise the entire rotary tiller.

[0003]

By the way, in such a conventional device, since the fulcrum position of the rear cover is constant without moving in the front-rear direction, the length of the rear cover is insufficient when the user is shallowly raised. In this case, the plowed soil is likely to be scattered backwards, and on the other hand, the rear cover becomes unnecessarily long when deeply raised.For example, when the ridger is installed, the ridge working device and the rear part There was a problem that the covers interfered with each other.

In addition, in the case of the conventional apparatus, since the lower edge of the rear cover presses the surface of the tilled soil to level it, the tiller is used when the plowing depth is shallow or deep. There has been a problem that the leveling performance is changed due to a large change in the distance from the rear cover to the lower edge. For this reason, among the conventional devices, there is also a device that rotates the tilling cover itself around the axis of the tilling shaft in order to always keep the inclination of the rear cover constant regardless of the size of the tilling depth. As for the rotation of the tilling cover, there is a drawback that the operation is troublesome because it is generally a method of rotating the manual operation lever and moving it back and forth.

[0005]

The present invention has been proposed in view of the above problems, and the following technical means have been taken. That is, a rotary cover 17 that rotates in the front-rear direction while covering the cultivating part 16, an actuator 20 that rotates the rotary cover 17, and a sensor S2 that detects the position of the rotary cover 17. , A position setter I for setting the position of the rotary cover 17, and a controller 13 for moving the rotary cover 17 to the position designated by the position setter I. It is the configuration of the tilling depth control device of the tari tiller.

[0006]

Embodiments of the present invention will now be described based on the embodiments shown in the drawings. As shown in side view in FIG.
The rotary cultivator 2 is connected to the tractor-1 by a working machine connection link mechanism 5 including lower links 3 and 3 at the lower left and right and a top link 4 at the upper center, and a lift cylinder 7 of a hydraulic lifting mechanism 6 is lifted. The left and right lift arms 9 and 9 which move up and down with the movement of the piston 8 are connected to the lower links 3 and 3 via the left and right lift rods 10 and 10.
In order to automatically control the plowing depth, the plowing depth set value set by the operator using the plowing depth setting device I made of a volume or the like is set to the rotary plowing device 2 of the rotary plowing device 2. Until the plowing depths match, the on / off operation command of the ascending solenoid valve 11 or the descending solenoid valve 12 is sent from the control unit 13 such as a microcomputer to the ascending drive unit 14 or the descending drive unit 15. It is provided so as to be amplified and output via.

A cover 17 for covering the rear of the tilling part 16 of the rotary tiller 2 is provided with a drive case 18 for the rotary tiller 2.
Also, the fulcrum pins 19, 19 are pivotally supported vertically on the left and right side stays so that the cover 17 can be rotated up and down by the movement of the piston 21 of the hydraulic actuator 20. When a plurality of tilling depth sensors S1 are laterally arranged at the trailing edge of -17 and the trailing edge of the cover 17 is in a grounded state, the working depth 22 of the tilling depth sensor S1 is grounded. For example, the normally open contact is provided so as to be turned on, and for example, the fixed cover-2 of the rotary cultivating device 2 is provided.
The vertical rotation position of the cover 17 with respect to 3 is detected by a stroke sensor S2 constituted by using, for example, a linear sliding type potentiometer, and the operator sets the working depth setting device I. If the tilling depth setting value is specified by operation, when the tilling section 16 is located at this tilling depth setting value, the cover-1
7 is calculated by the control unit 13 and a command from the control unit 13 is sent via the ascending drive unit 24 or the descending drive unit 25 so that the cover 17 is located at this rotational position. Then, the ascending solenoid valve 26 or the descending solenoid valve 27 is turned on and off, whereby the piston 21 of the hydraulic actuator 20 is configured to move in and out, and subsequently, the working depth sensor S1 is operated. The control unit 13 is configured so that an operation command is output from the control unit 13 to the hydraulic lifting mechanism 6 so that the rotary tiller 2 is raised or lowered to a position at which the majority of the rotary tillers are turned on. Therefore, when the working depth setting device I is operated to reduce the working depth,
When hydraulic oil is fed into the hydraulic actuator 20, the cover 17 moves downward, and conversely, when the working depth is deepened, the cover-1
7 moves up. The moving amount of the cover 17 is determined corresponding to the set value by the tilling depth setting device I on both the ascending side and the descending side, and the moving amount is monitored by the stroke sensor S2.

In the above example, at the start of the plowing work, the operator sets the plowing depth with the plowing depth setting device I and advances the tractor-1 while lowering the rotary plowing device 2. Then, the cover 17 is rotated to a predetermined position according to the set value by the working depth setting device I, and substantially at the same time, the working depth sensor S1.
Some of the actuators 22 come into contact with the ground, and the tilling work is continued in this state.

During the tilling work, when the tiller section 16 tries to move in a direction in which some of the actuators 22 of the tillage depth sensor S1 are separated from the ground and the tillage depth becomes shallow due to the change of the unevenness of the ground, the hydraulic lifting mechanism 6 operates. Lower the entire rotary tiller 2, and in the opposite case raise the entire rotary tiller 2 to raise the tiller 1
6 is controlled to keep it in place. Therefore, the working depth is maintained at the set working depth, and the cover 17
The surface of the cultivated soil pressed by is flatly leveled without undulating, and as a result, the cultivating depth is controlled in a state where there is little fluctuation in the cultivating depth.

[0010]

According to the present invention, as described above, the plowing section 16 is used.
Rotating cover 17 that rotates in the front-back direction while covering the
And an actuator for rotating the rotary cover 17
And a position setting device I for setting the position of the rotary recovery cover 17. The rotary recovery device 17 is located at the position designated by the position setting device I. Since the control section 13 is provided to move the rotary tiller, the rotary cover 17 can be easily and quickly moved to a predetermined position. And the operability is significantly improved.

[Brief description of drawings]

FIG. 1 is a side view of a rotary cultivator and a tractor.

FIG. 2 is a control circuit diagram.

FIG. 3 is a perspective view showing a relationship between a cover and an actuator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tractor 2 rotary tiller 5 working machine connection link mechanism 6 hydraulic lifting mechanism 7 lift cylinder 8 lift piston 9 lift arm 10 lift rod 13 control circuit (control section) 16 tiller section 17 rotary cover 20 actuator (Hydraulic actuator) S1 Tillage depth sensor S2 Stroke sensor I Tillage depth setting device

Claims (1)

[Claims] 1. A rotary cover 17 which rotates in the front-rear direction while covering the cultivating part 16, an actuator 20 which rotates the rotary cover 17, and a position of the rotary cover 17 are detected. It is composed of a sensor S2 and a position setter I for setting the position of the rotary cover 17, and a controller 13 is provided to move the rotary cover 17 to the position designated by the position setter I. A tilling depth control device for a rotary tiller.