JPH0513111U - Automatic control device for tractor working depth - Google Patents

Abstract

(57) [Summary] [Purpose] While improving the operability of automatic plowing depth control,
Measure the number of parts. [Configuration] An operating range for canceling the automatic working depth control is set in the operating range of the working depth setting volume 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic control device for a tractor's working depth.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, some tractors of this type are equipped with an automatic plowing depth control unit that controls the raising and lowering of the tilling working unit so as to maintain the set plowing depth of the plowing depth setting device. The operating tools related to control were equipped with the above-mentioned tilling depth setting device and the tilling depth automatic switch. However, in this case, when performing automatic plowing depth control, it is necessary to operate at two places, the automatic plowing depth switch and the plowing depth setting device, and when canceling plowing depth automatic, the operation at one place is required. However, it is necessary to operate the automatic plowing depth switch that is located at a different position from the plowing depth setting device, which complicates the operation and reduces the operability. The increase in the number of parts was also a problem.

[0003]

[Means for Solving the Problems]

 The present invention was devised with the object of providing an automatic control device for the working depth of a tractor capable of eliminating these drawbacks in view of the above-mentioned circumstances. In a tractor having an automatic plowing depth control unit for controlling the raising and lowering of the tilling working unit so as to maintain the cultivating depth, the plowing depth setting unit is operated at a preset preset position in the plowing depth automatic control unit. It is characterized in that an automatic tilling depth removing means for canceling the automatic tilling depth control is provided. Further, in a tractor equipped with an automatic plowing depth control unit for controlling the raising and lowering of the tilling working unit so as to maintain the plowing depth set by the plowing depth setting unit, the plowing depth setting unit sets the plowing side setting unit on the deep plowing side. It is characterized in that an automatic tilling depth releasing means for releasing the automatic tilling depth control based on the operation at the end position is provided. With this configuration, the present invention allows ON / OFF of the automatic plowing depth to be operated at one location, improving operability, and reducing the number of parts. is there.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 is a traveling machine body of a tractor, and a rotary tillage type working section 3 is movably connected to a rear portion of the traveling machine body 1 via an elevating link mechanism 2, and the working section 3 Moves up and down based on the vertical swing of the lift arm 5 associated with the expansion and contraction of the hydraulic cylinder 4, and tilts left and right based on the expansion and contraction of the lift rod cylinder 6. is there.

Reference numeral 7 denotes a side panel disposed on the side of the driver's seat, and at a front portion of the side panel 7, an elevating operation lever 8 for elevating and lowering the working unit 3 is arranged, At the rear part, the automatic tilt switch 9 for turning ON / OFF the automatic tilt control, the lifting control volume 10 for setting the rising limit of the working unit 3, the tilt setting volume 11 for setting the tilt of the working unit 3, and the working unit 3 are provided. A mode switching switch 12 for switching the control mode according to the type, sensitivity adjustment switches 13 and 14 for adjusting the sensitivity of automatic plowing depth control and automatic inclination control, and a plowing depth manual switch for adjusting the set position of the rear cover 3a described later. 15. The operation tools such as the lift arm manual switch 16 for manually operating the lift arm 5 are provided so as to be covered by the openable / closable transparent cover 17. In the middle part of the panel 7, an elevating operation switch 18 for elevating and lowering the working part 3 by a one-touch operation, and a working depth setting volume 19 having a picking part larger than other operating tools are arranged. ing.

Further, reference numeral 20 denotes a control unit disposed below the side panel 6, and the control unit 20 is configured by using a so-called micro computer. In addition to each operation tool, signals from sensors such as a tilling depth detection sensor 21 that detects a swing angle of the rear cover 3a that swings up and down following a change in tilling depth and a tilt sensor 22 that detects the left and right inclination of the traveling body 1 On the other hand, it is configured to output an operation signal to the hydraulic cylinder 4, the lift rod cylinder 6 and the like based on a determination based on these input signals. That is, in the memory (ROM) provided in the control unit 20, the position control for automatically raising and lowering the working unit 3 so as to maintain the set height of the elevating operation lever 8 and the set plowing depth of the plowing depth setting volume 19 are maintained. Plow depth automatic control that automatically raises and lowers the working unit 3 based on the detection of the working depth detection sensor 21, automatic tilting that automatically tilts the working unit 3 based on the detection of the tilt sensor 22 so as to maintain the set tilt of the tilt setting volume 11. A control procedure such as control is written in advance.

Now, FIG. 3 is a main routine of the control unit 20, which is configured to perform switching between automatic plowing depth control and position control, ON-OFF of automatic tilt control, and the like. The automatic tilt control is turned on and off based on the operation of the automatic tilt switch 9. The automatic plowing depth control is based on that the plowing depth setting volume 19 is operated in the normal setting range. On the other hand, the plow depth setting volume 19 is released based on the operation of the plow depth setting volume 19 to the preset OFF position at the deep plowing side set end position. In the embodiment, the automatic working depth control is performed only when the working depth setting volume 19 is operated in the normal setting range and the elevating operation lever 8 is operated to the lowest position (the working depth automatic position). It's ready to run.

In the embodiment of the present invention configured as described above, when the plowing depth automatic control is performed, the plowing depth setting volume 19 may be turned to the normal setting range to set the plowing depth to an arbitrary plowing depth. When canceling the deep automatic control, the plowing depth setting volume 19 may be turned to the OFF region provided at the deep plowing side setting end position. Therefore, when turning on / off the automatic plowing depth control, it is sufficient to operate only the single plowing depth setting volume 19 without operating the plowing depth setting volume and the plowing depth automatic switch as in the conventional case. As a result, the operability in the automatic plowing depth control can be significantly improved.

Further, since the conventional plowing depth setting switch 19 is also used to eliminate the need for the conventional plowing depth automatic switch, the number of parts can be reduced, and the operability associated with simplification of the side panel 7 is improved. Can also be improved.

Moreover, when providing the OFF region for canceling the automatic control of the plowing depth in the plowing depth setting volume 19, the OFF region is provided at the deep plowing side setting end portion, avoiding the shallow plowing side setting end position. There is. In other words, when the OFF area is set at the shallow end side setting end position, when the plowing depth setting volume 19 is turned to cancel the automatic plowing depth control, the working unit 3 once rises, and then the automatic plowing depth automatic control is performed. When it is released and switched to the position control, useless movement of the working unit 3 occurs such that the working unit 3 makes a complete turn and descends based on the raising / lowering operation lever 8 being at the lowermost position (the automatic plowing depth position). In the present embodiment in which the OFF region is set at the deep plowing side setting end position, when the plowing depth setting volume 19 is turned to cancel the automatic plowing depth control, the corresponding position (maximum position) of the lifting operation lever 8 is set. Since the working unit 3 descends so as to approach the descending position), the movement of the working unit 3 during the automatic cancellation of the working depth can be made smooth.

Further, in the embodiment, since the picking portion of the working depth setting volume 19 is large, the ON and OFF areas of the automatic working depth control can be recognized very easily, and the operability is improved. It can further contribute to the improvement.

Furthermore, in the embodiment, the plowing depth setting volume 19 is provided in an exposed state at a position where it is not covered by the transparent cover 17, and the single plowing depth setting volume 19 that is exposed turns ON / OFF the automatic plowing depth control. Since it is configured so that the working depth can be set, the frequency of opening and closing the transparent cover 17 can be significantly reduced. As a result, the operability can be improved, and the transparent cover 17 cannot be placed inside. It is possible to improve water resistance, dust resistance and the like of the operation tool provided.

[0013]

[Operation effect]

 In short, since the present invention is configured as described above, the automatic tilling depth control is performed while controlling the raising and lowering of the tilling working unit so as to maintain the set tilling depth of the tiller depth setting device. It will be released based on the working depth setting device being operated to the predetermined position set in advance. Therefore, it is possible to perform the automatic plowing depth by operating only the plowing depth setting device without performing the two operations of the plowing depth automatic switch and plowing depth setting device as in the past. It is possible to cancel the automatic plowing depth only by operating the plowing depth setting device without operating the plowing depth automatic switches arranged at different positions. As a result, the operability of the tractor equipped with the automatic plowing depth control unit can be significantly improved. Moreover, since the automatic plunge depth switch is not required as the plowing depth setting device is also used, the number of parts can be reduced and the operability can be further improved by simplifying the operating portion.

When setting the release position for canceling the automatic plowing depth control on the plowing depth setting device, the releasing position is set to the deep plowing side setting end position while avoiding the shallow plowing side setting end position. In this case, the movement of the tilling working unit can be made smooth when the automatic working depth is released. In other words, when the release area is set at the shallow end side setting end position, operating the tillage depth setting device to release the tillage depth automatic control raises the tilling work unit once, and then the tillage depth automatic control is released. If this happens, the manual raising / lowering operation lever is at the lowest position (automatic plowing depth position), and the plowing working section makes a complete turn and lowers. When it is installed in the position, when the tiller depth setting device is operated to cancel the automatic tiller depth control, the tiller working unit descends and approaches the corresponding position (the most lowered position) of the manual lifting operation lever. Therefore, it is possible to cancel the automatic control of the plowing depth smoothly without unnecessary raising and lowering of the tilling work section.

[Brief description of drawings]

FIG. 1 is a side view of a tractor.

FIG. 2 is a plan view of a side panel.

FIG. 3 is a flow chart showing a control procedure of a control unit.

[Explanation of symbols]

 1 Traveling aircraft 3 Working part 7 Side panel 19 Cultivation depth setting volume 20 Control part

Claims (2)

[Scope of utility model registration request] 1. A tractor including an automatic plowing depth control unit for controlling elevation of a tilling working unit so as to maintain a plowing depth set by the plowing depth setting unit, wherein the plowing depth setting unit is provided with a plowing depth setting unit. An automatic plowing depth control device for a tractor, which is provided with automatic plowing depth canceling means for canceling the plowing depth automatic control when operated at a preset predetermined position. 2. A tractor comprising an automatic plowing depth control unit for controlling elevation of a tilling working unit so as to maintain a plowing depth set by the plowing depth setting unit, wherein the plowing depth setting unit is provided with a plowing depth setting unit. An automatic plowing depth control device for a tractor, which is provided with an automatic plowing depth canceling means for canceling the plowing depth automatic control based on being operated to a deep plowing side set end position.