JPH0615343B2 - Structure of control operation part in agricultural tractor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control operation part structure in an agricultural tractor in which a work attitude of a work part such as a position control is controlled by a microcomputer. .

[Problems to be Solved by Prior Art and Invention] Conventionally, among these kinds of agricultural tractors, a position control for controlling the height of a working unit provided on a traveling machine body, a working depth control, etc., by a microcomputer. There is one that is adapted to perform other control of. However, in the prior art, the height control operation unit for performing the height control adjustment is
Like the control operation unit that performs other control adjustments, it was configured with electrical parts such as snap switches and other switches, so during actual work, etc., the actual operation direction and operation amount of the height control operation unit It is inevitable that a speedy and accurate control operation will not be possible because there will inevitably be a real difference between the vertical direction of the work machine and the amount of height change, and the height control operation unit and other control operation units will not be allowed. Since they are arranged side by side, these operations are often confusing, and there is a drawback in that they are extremely inferior in operability, which is a problem.

[Means for Solving the Problem] The present invention was devised with the object of providing a control operation part structure in an agricultural tractor capable of eliminating these drawbacks in view of the above circumstances. In the agricultural tractor configured to perform the position control for controlling the height of the working unit provided on the traveling machine body and other controls such as the plowing depth control, the height setting of the position control for the agricultural tractor. A position control lever for performing the operation and another control operation tool for performing the setting operation of other controls are provided on the fender for covering the rear wheels by being arranged on the driver's side of the traveling body. The position of the position control lever and other control operation tools are close to each other in the front-rear direction, and the position of the position control lever is lower toward the front. In addition, the other control operation tool is arranged in each of the fan pendant horizontal portions that are substantially horizontal from the upper end of the wing inclined portion toward the rear.

With this configuration, according to the present invention, the working unit is controlled by the control by the micro computer, but the height setting operation of the working unit can be performed with an operation feeling suitable for the actual working condition. In addition, a quick and reliable control operation including other control operation units can be performed.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of an agricultural tractor, and a rotary type tilling work section 2 is provided at the rear of the traveling machine body 1 so as to be vertically movable via a link mechanism 3. Reference numeral 4 denotes a fender portion of the traveling vehicle body 1.
In the embodiment, the right and left are integrally formed including the step portion 5, but in the left and right fan ender portions 4, the sloping portion 4a becomes lower toward the front side, and from the upper end of the sloping portion 4a toward the rear. Fender horizontal part 4 which became substantially horizontal
b is formed, and a seat 6 is provided in the central portion sandwiched between the left and right fan-ender portions 4. Where 7
Is a steering wheel, 8 is a rear wheel covered by the ender 4, and 9 is a front wheel.

A concave portion 10 is integrally provided on the upper surface of the ender portion 4 from the inclined portion 4a to the horizontal portion 4b. The concave portion 10 is assembled with a control unit 11 configured by using a microcomputer. ing. That is, the left and right and the rear side of the recessed portion 10 are covered by the standing walls of the fan portion 4, the bottom portion has a two-step upper and lower step shape, and the front side and the upper side are open. Then, the control unit 11 is integrally fixed to the upper bottom surface of the one recess (right side in the embodiment) by the tightening tool 11a. Again 1
Reference numerals 2 and 13 denote cover bodies attached to the left and right recesses 10, and the upper surfaces of these cover bodies 12 and 13 are
An inclined portion and a horizontal portion are formed so as to extend substantially along the upper surface of the fan portion 4, and the horizontal portion 13b of the cover body 13 on the right side of the inclined portion is inclined above the control portion 11 due to the inclination. A manual switching switch 14, a tilt setting device 15, a tilling depth setting device 16, an automatic tilting switch 17 including a push button type switch, and an automatic tilling depth switch 18 are provided respectively. Further, the lever 1 for position control is provided on the cover body inclined portion 13a immediately in front of these equipments.
9 is provided, but the base end of the position control lever 19 is
Is integrally attached to the lower surface side of the cover body 13 together with a position sensor 29 for detecting the lever position of
The lever 19 protruding upward from the lever guide 19a is
It is possible to swing back and forth within a range regulated by the upper and lower stoppers 19b. In this way, the cover body 13 has the position control lever 19 on the inclined portion 13a and the switches 14 to 14 on the horizontal portion 13b.
18 are attached to each and constitute a kit as a control operation unit.

Next, the operation of the tilt manual changeover switch 14, the tilt setting device 15, the working depth setting device 16, the automatic tilting switch 17, the automatic working depth switch 18, and the position control lever 1 can be easily performed with reference to a flow chart. Explained.
First, when the engine is started, the set lamp provided on the control panel 20 displays the monitor 27. However, if the set lamp is lit here, the set position of the position control lever 19 is not appropriate. Then, the position control lever 19 is operated so that the set lamp is loosely positioned so that the set lamp is turned off. In this way, position control is performed in the state of being set to the set position.
Further, when the position control lever 19 is operated up and down to set to a desired position, the set value from the position sensor 29 which detects this set position and the lift arm angle sensor 22 provided on the hydraulic lift arm 21 are set. The detection result is input to the control unit 11 for comparison and judgment, and if they do not match, a control valve (not shown) is controlled to swing the hydraulic lift arm 21 up and down to move the working unit 2 to the set position. The position of the working part is automatically controlled in this manner. If it is desired to move the working unit up and down manually, the lift arm manual switch 23 provided on the control panel 20 is switched to the manual side to release the position control and manually move up and down. You can move. On the other hand, if you want to use automatic plowing depth control, position control lever 1
9 is moved to the lower position and the automatic plowing depth switch 18
When the button is pressed (the monitor is displayed and the position control is automatically released), the plowing depth set value set by the plowing depth setting device 16 and the rear cover 24 of the working unit 2 are pressed.
The detected value from the tilling depth sensor 25 for detecting the tilling depth is compared and determined by detecting the rocking posture of the control valve, and the control valve is switched by the control command of the control unit 11 so that the detected value matches. As a result, the hydraulic lift arm 21 moves up and down, whereby the automatic plowing depth control is performed.
Further, when it is desired to perform automatic tilt control such as when performing cultivating work on a sloping land, the automatic tilt switch 17 is pressed (displayed on the monitor) and the tilt setting device 15 is operated to obtain a desired tilt state. If set, this set value,
The control value is controlled by the control unit 11 so that the inspection value by an inclination detection sensor (not shown) is compared and determined, and the automatic inclination control is performed by this control. The posture of the working unit 2 is controlled accordingly. Incidentally, 26 is a grip (handrail) provided on the fan portion 4, and 28 is a main transmission lever.

In the embodiment of the present invention configured as described above, as described above, the control such as the position control, the automatic plowing depth control, the automatic tilt control and the like is optionally performed by switching the switches. The control of these is performed by the control unit 11 configured by using a microcomputer. However, in the present invention, the height adjustment of the working portion 2 by the position control is performed by operating the position control lever 19, and accordingly, the height control is performed by the microcomputer. However, the height adjustment is performed by the lever operation method used in the conventional mechanical one, and the height of the working unit 2 can be controlled according to the field conditions.

In addition, the position control lever 19 is provided with the cover body slanted portion 13a located on the fander slanted portion 4a, and the lever operation directed to the lower front and the upper rear can be matched with the lifting operation of the working unit. The work unit can be moved up and down with an operational feeling that matches the actual work situation.
Moreover, since the switches 14 to 18 for performing other control settings such as tilling depth control are arranged in the rear cover body horizontal portion 13b close to the position control lever 19, the position control lever 19 is provided. By moving the gripping hand to the back, the setting operation of other control operation tools can be easily performed, and as a result, the operator can move the hands sensuously without looking at the lever or the operation tool. Can be replaced with a lever or an operating tool, and the operability of the work unit control including the position control lever 19 can be made extremely good.

Moreover, since the lever operation system is used, the operation range of the position control lever 19 is
It is adjusted by slidingly adjusting the set position of b. Therefore, the work suitable for the field conditions can be arbitrarily performed, and at the same time, the lever operation of the position control lever 19 can be performed. The vertical movement of the working unit 2 can be controlled and the height position can be set, so that the operability can be improved.

[Effects] In summary, since the present invention is configured as described above, the position control lever that controls the raising and lowering of the working portion is the front end lower portion and the rear upper portion of the lever tilting portion. Therefore, it is possible to match the operation of raising and lowering the working unit, and it is possible to raise and lower the working unit with an operation feeling that is directly adapted to the actual working condition. In addition, since a control operation tool for performing other control settings such as plowing depth control is arranged in the rear horizontal portion of the fencer close to the position control lever, it is necessary to grasp the position control lever. By moving it backward, the setting operation of other control operation tools can be performed easily, and as a result, the operator can move the levers and operation tools by sensuous hand movements without looking at the levers or operation tools. The operability of the working unit control including the position control lever can be extremely improved.

[Brief description of drawings]

The drawings show an embodiment of a control operation part structure in an agricultural tractor according to the present invention. FIG. 1 is an overall side view of the agricultural tractor, FIG. 2 is an overall plan view of the same, and FIG. 4 is a rear view of the main part, FIG. 4 is a sectional view of the main part side, FIG. 5 is an enlarged plan view of the main part of the fan part, FIG. 6 is a longitudinal sectional view of the same as above, and FIG. 7 is a perspective rear view of the driver's seat part. FIG. 9 is a side view of the working section, FIG. 9 is a plan view of relevant parts of the same, and FIG. 10 is a flow chart. In the figure, 1 is a traveling machine body, 2 is a working unit, 4 is a fan unit,
4a is a sloping portion of the ender, 4b is a horizontal portion of the ender, 6
Is a seat, 11 is a control unit, 14 to 18 are switches, 19
Is a position control lever.

Claims (1)

[Claims] 1. An agricultural tractor configured to perform a position control for controlling a height of a working unit provided on a traveling machine body and another control such as a plowing depth control by using a microcomputer. Position control lever for performing the height setting operation of the control and other control operation tool for performing the setting operation of other controls,
The position control lever and other control operation tools are placed close to each other in the front-rear direction, and the position control lever becomes lower toward the front side in order to install it on the fan side that is arranged on the side of the driver's seat of the traveling aircraft and covers the rear wheels. A control operation part structure in an agricultural tractor, wherein another control operation tool is disposed in the fan pendant inclined portion and in a fan ender horizontal portion which is substantially horizontal from the upper end of the fan ender inclination portion toward the rear.