JP2563884Y2 - Tractor tillage depth automatic control device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tractor depth control device having a rear cover moving mechanism.

[0002]

2. Description of the Related Art
Some tractors of this type perform so-called automatic plowing control of raising and lowering the plowing operation unit based on the swing angle of the rear cover so as to maintain the set plowing depth of the plowing depth setting device,
Further, in order to improve the work accuracy by matching the ground contact posture (target swing angle) of the rear cover at the time of shallow plowing and at the time of deep plowing, the rear cover fulcrum is set when the set plowing depth is the shallow plowing value. It is known that the rear cover fulcrum is moved forward and upward when the set till depth is a deep tillage value while the rear till is moved downward and backward. By the way, the rear cover needs to be moved even when the cultivation machine is mounted, for example, even when the cultivation depth is not automatically controlled. For this reason, conventionally, a rear cover manual switch is separately provided, and the manual switch is operated. The rear cover is moved based on the However, in this case, the number of parts cannot be increased due to an increase in the number of operating tools, and a single rear cover moves based on a plurality of operating tools, which complicates the operation and increases operability. It was a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made with the object of providing an automatic tractor tillage depth control device capable of eliminating these disadvantages. The tilling depth control unit automatically controls the raising and lowering of the tilling work unit based on the swing angle of the rear cover so as to maintain the tilling depth set by the tilling depth setter, and automatically controls the movement of the rear cover based on the above set tilling depth. in tractor comprising a control unit, during operation region of the tilling depth setting device
In addition, a release area for releasing the automatic
In addition, the tillage depth setting device releases the rear cover in the tillage depth automatic control unit.
Stop to stop at the position when operated in the excluding area
A means is provided . And this invention reduces the number of parts by this structure,
The rear cover operation is simplified to improve operability.

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of an agricultural tractor, and a rotary tilling type working unit 3 is connected to a rear portion of the traveling body 1 via a lifting link mechanism 2 so as to be able to move up and down. Is raised and lowered by the vertical swing of the lift arm 5 accompanying the expansion and contraction operation of the hydraulic cylinder 4, and the like, and the conventional configuration is the same.

[0006] Reference numeral 6 denotes a main cover of the working unit 3. The main cover 6 is formed in an arc shape so as to cover a tilling claw 8 attached to a tilling claw shaft 7. A pair of left and right roller brackets 10 in which a plurality of guide rollers 9 are arranged side by side are fixed.

[0006] On the other hand, reference numeral 11 denotes a rear cover provided at the rear end of the working unit 3.
, And is urged downward constantly by a bullet 11a, and furthermore, a tillage depth detection sensor (a potentiometer that detects the tillage depth based on the swing angle of the rear cover 11) 13 On the support shaft 12, a pair of left and right guide rails 14, which are curved in an arc shape along the peripheral surface of the main cover 6 and are formed to have a substantially zigzag cross section, are fixedly provided. , These guide rails 1
Reference numerals 4 are externally fitted to the guide rollers 9 of the roller bracket 10, respectively. In other words, the rear cover 11 is movable along an arc having the tilling claw shaft 7 substantially at the center. I have come to maintain.

[0007] Further, 14 is a top mast 1 of the working unit 3.
5, the electric cylinder 14 is provided with a torque limiter, and the rear cylinder 11 (support shaft 12), to which the tip is pivotally connected, is extended and retracted based on an operation command from a control unit 16 described later. To be moved.

Reference numeral 17 denotes a side panel disposed on the side of the driver's seat. The exposed portion of the side panel 17 has a frequently operated elevating operation lever 18, an elevating operation switch 19, and a plowing depth setting. On the other hand, the volume 20 is provided, and the other cover 22 covered by the transparent cover 21 is provided with another operation tool 22 having a low operation frequency.

The control unit 16 is a control unit constructed by using a so-called microcomputer (CPU, ROM, RAM) and the like. The control unit 16 includes the tillage depth detecting sensor 13, the up / down operation switch 19, and the tillage depth. Setting volume 2
In addition to 0, a cylinder length sensor 23 for detecting the length of expansion and contraction of the electric cylinder 14, a lever angle sensor 24 for detecting the longitudinal swing angle of the lifting / lowering operation lever 18, and an arm angle sensor 25 for detecting the swing angle of the lift arm 5. And the like, and an operation command is output to the hydraulic cylinder 4, the electric cylinder 14, and the like based on the determination based on these input signals.
That is, in the control unit 16, the position control for automatically raising and lowering the working unit 3 based on the detection of the arm angle sensor 25 so as to maintain the set height of the raising and lowering operation lever 18, and the set cultivation depth of the cultivation depth setting volume 20. The working unit 3 is automatically moved up and down based on the detection of the tillage depth detection sensor 13 so as to maintain the rear cover position based on the detection of the cylinder length sensor 23 so as to maintain the rear cover posture suitable for the set tillage depth of the tillage depth setting volume 20. 11 is configured to perform the plowing depth automatic control for controlling the movement of the pneumatic head 11.

FIG. 5 shows a main routine of the control unit 16. The main routine is for switching between the automatic plowing depth control and the position control, which are subroutines, and includes a rear cover movement control. The automatic plowing depth control is executed based on the fact that the plowing depth setting volume 20 is located in the normal setting area, while the plowing depth setting volume 20 is controlled.
Is released based on the fact that it is located in the OFF region preset at the deep cultivation side setting end, and switching to the position control is performed in this state. That is, the cultivation depth setting volume 20 is also used as an ON-OFF switching operation tool of the cultivation depth automatic control.
Is operated in the OFF range, the movement of the rear cover 11 is also immediately stopped at the current position.

In the embodiment of the present invention configured as described above, the automatic cultivation depth control including the rear cover movement control is released by operating the cultivation depth setting volume 20 to the OFF range. Since the movement of the rear cover 11 is also stopped at the same time, the working depth setting volume 20 can be used also as a manual operation tool of the rear cover 11. That is, when it is desired to stop the rear cover 11 at an arbitrary position, first, the set volume 20 is operated to the normal set area to move the rear cover 11 toward the corresponding position of the set plowing depth. If the working depth setting volume 20 is operated to the OFF range at the stage when the desired position is reached, the rear cover 11 can be stopped at the desired position.
Accordingly, the dual use of the tillage setting volume 20 eliminates the need for a dedicated rear cover manual operation switch, and as a result, the number of parts can be reduced.

Moreover, since the rear cover 11 does not move based on a plurality of operating tools as in the related art, the rear cover 11 moves based on a single tillage setting volume 20.
Simplification of operations Hakare, this result, wear on improvement of operability in the rear cover moving operation.

The present invention is, of course, not limited to the above-described embodiment. For example, the release area of the automatic plowing depth control is not limited to the deep-plowing-side set end position, but may be a plow-depth setting volume. It goes without saying that the position may be set to any position as long as the operation area is set to. In addition, the release area is divided, and in one release area, the rear cover is set to stop immediately, while in the other release area, the rear cover is not stopped immediately, but is stopped after being moved to the deep cultivation side limit position. It may be set to do so. In other words, since the manual operation of the rear cover is often performed when mounting a ridger, soil cultivator, etc., automatically move the rear cover to the optimum deep cultivation side limit position when mounting the ridger, soil cultivator, etc. The operability can be further improved by separately setting a release area in which operation can be performed. Alternatively, a conventional rear cover manual operation switch may be provided as it is, and the rear cover moving operation by the operation switch may be differentiated from the rear cover moving operation by the plowing depth setting volume. In other words, if the rear cover automatic operation control is released when the rear cover is manually operated by the rear cover manual operation switch, the rear cover can be stopped at any position during the automatic plowing depth control. Can be supported.

[0014]

[Effects] In summary, since the present invention is configured as described above, at the time of automatic plowing depth control, the rear cover is moved and controlled based on the set plowing depth, while the operation range of the plowing depth setting device is controlled. A release zone to release the automatic plowing depth control.
The rear cover is released when operating in the release area.
It will stop at the position where it was operated in the area. This result
As a result, if you want to stop the rear cover at an arbitrary position and work , operate the tillage depth setting device to the normal setting area and move the rear cover toward the corresponding position of the set tillage depth. When the tillage setting device is operated to the release area when the position reaches the position, the work in which the rear cover stops at the desired position
I can . Therefore, the tillage setting device can also be used as the rear cover manual operation tool, and a special manual switch
No need to install a switch, allowing a reduction in the number of parts.
In addition, operability is improved .

[Brief description of the drawings]

FIG. 1 is a side view of a tractor.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view of a side panel.

FIG. 4 is a block diagram schematically showing a control mechanism.

FIG. 5 is a flowchart for closing a control procedure in a control unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 3 Working part 11 Rear cover 14 Electric cylinder 16 Control part 20 Tillage depth setting volume

Claims (1)

(57) [Scope of request for utility model registration] 1. A tilling operation unit is automatically raised and lowered based on a swing angle of a rear cover so as to maintain a set cultivation depth of a cultivation depth setting device, and a rear cover is automatically moved based on the set cultivation depth. in tractor comprising a control allowed to tilling depth automatic control unit, during operation region of the tilling depth setting device, plowing
A release area for releasing the deep automatic control is provided, and
In the deep automatic control section, the rear cover is set to
Stop means to stop at the position where it was operated
An automatic tractor depth control device, which is provided.