JPH0545204B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control operation unit arrangement structure for an agricultural tractor in which working posture control of a working unit such as position control is performed by a microcomputer. be.

[Prior Art and Problems to be Solved by the Invention] Conventionally, this type of agricultural tractor has a position control system that controls the height of a working section provided on the traveling body using a microcomputer.
There are some that perform other controls such as plowing depth control. However, in the past, in this device, the height control operation section for performing the height control adjustment was composed of electrical components such as switches such as a snap switch, like the control operation section for other control adjustments. During actual work or when the machine turns around on a headland, there is inevitably a discrepancy between the amount of operation of the height control operation section and the amount of actual height change of the work equipment. Not only does it not allow quick and accurate control operations, but because the various control operation sections are arranged side by side, it is often confusing to operate these, and this has the disadvantage of being significantly inferior in operability, which has become a problem. .

Therefore, while adjusting the height of the working part using a lever system using a position control lever, we installed an operation box in the opening made in the fender.
It is proposed that the position control lever and other control tools such as the plowing depth control section be centrally arranged in the operation box, but in this case, the control tools are carried around by running wheels. In order to protect the operation box from wet mud, muddy water, etc., it is necessary to use a completely waterproof structure to cover the bottom surface of the operation box that directly faces the running wheels, which makes the structure complicated and costs high. be. Moreover, with this model, the lead wires pulled out from the operating tools are arranged inside the fender on the side where the running wheels are, so in order to draw the lead wires into the inside of the aircraft, there is an opening in the fender for leading the lead wires. However, in this case, there is an additional problem that it is necessary to seal the opening in a hermetically sealed manner, which becomes troublesome and complicated.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a control operation unit arrangement structure for an agricultural tractor that can eliminate these drawbacks. , a microcomputer is used to perform position control that controls the height of a working section provided on the traveling machine based on lever position adjustment of the position control lever, and other controls such as plowing depth control. On the other hand, in a field working machine that is provided with a fender that is disposed on the side of the driver's seat of the traveling machine and has surface parts that cover at least the upper and front sides of the traveling wheels and the side of the driver's seat, the upper surface part of the fender and At the top of the corner formed by the front and side surfaces of the driver's seat, there is a wall that protrudes toward the running wheels and is open at the front, above, and inward in the left and right direction, and is shaped like a standing wall at the rear and outward in the left and right direction. A step-shaped recessed groove having an enclosed groove bottom is formed, and the recessed groove is covered with a cover body that is attached to the fender from the top surface side, and the cover body is provided at a corner position between the fender top surface and the front surface. The position control lever is mounted at a corresponding position so as to be movable from the forward lying position to the rear standing position, and the other control operation part is arranged behind the position control lever mounting part of the cover body. It is something to do.

Accordingly, in the present invention, although the working part is controlled by a microcomputer with this configuration, the height of the working part is adjusted by a lever method in accordance with the actual work situation. The control operation parts, including the control operation parts, are centrally arranged on the fender to enable quick and reliable control operations, and these control operation parts can be reliably protected by the fender.

[Example] Next, an example of the present invention will be described based on the drawings. In the figure, reference numeral 1 denotes a traveling body of an agricultural tractor, and behind the traveling body 1, a rotary tilling work section 2 is provided via a link mechanism 3 so as to be vertically movable. Reference numeral 4 denotes a fender of the traveling body 1. In the embodiment, the left and right fenders 4 including the step portion 5 are integrally molded, but a driver's seat 6 is located in the center between the left and right fenders 4. It is provided. Here, 7 is a driving handle, 8 is a rear wheel, and 9 is a front wheel.

The left and right fenders 4 are provided with respective surface portions that cover the upper and front portions of the rear wheels 8 and the sides of the driver's seat 6. The corner apex portion formed by the face portion has a groove bottom that projects toward the rear wheel 8 side and is open at the front, upward, and inward in the left-right direction, and surrounded by a vertical wall at the rear and outward in the left-right direction. A stepped groove-like recessed groove portion 10 is formed. Furthermore, the groove bottom surface of the groove portion 10 is formed in two steps, upper and lower, and the upper groove bottom surface of the groove portion 10 of one (right side in the embodiment) of the fender 4 is formed using a microcomputer. A control section 11 is integrally fixed by a tightening tool 11a. Furthermore, reference numerals 12 and 13 are cover bodies that are attached to the fender 4 from above to cover the left and right concave grooves 10, respectively, and among these, the right cover body 13
is provided with a lever 19 for position control at a position corresponding to the corner between the fender top surface and the front surface of the cover body 13, 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 that detects the lever position of the position control lever 19. It is designed to be able to swing back and forth from the forward lying position to the rearward standing position within the restricted range. Further, on the cover body 13, behind the attachment part of the position control lever 19, there is a manual tilt changeover switch 14, a tilt setting device 15, a plowing depth setting device 16, and an automatic tilt switch 17 consisting of a push button type switch.
Similarly, an automatic tilling depth switch 18 is provided, and in this way, a position control lever 19 and switches 14 to 18 are integrally attached to the cover body 13 as one kit.

Next, the operations of the manual tilt switch 14, tilt setting device 15, tilling depth setting device 16, automatic tilt switch 17, automatic tilling depth switch 18, and position control lever 19 will be explained in a simple manner using a flowchart. Explain. First, when the engine is started, the set lamp provided on the control panel 20 will display on the monitor 27. If the set lamp lights up at this time, it means that the position control lever 19 is not in the appropriate set position. , there, the position control lever 19
Gently move it to the appropriate position so that the set lamp turns off. In this way, position control is performed in a state where the camera is positioned at the set position, and when the position control lever 19 is further operated up and down to set the desired position, this set position is detected. The set value from the position sensor 29 and the detection result from the lift arm angle sensor 22 provided on the hydraulic lift arm 21 are input to the control section 11 and compared and determined. The control valve is controlled to swing the hydraulic lift arm 21 up and down to adjust the position of the working part 2 to the set position, and in this way the position of the working part is automatically controlled. . If you want to manually move the working part up and down, switch the lift arm manual switch 23 provided on the control panel 20 to the manual side to cancel the position control and move the work unit up and down manually. It is now possible to move up and down. On the other hand, if you want to activate the automatic tillage depth control, move the position control lever 19 to the down position and press the automatic tillage depth switch 18 (the position control will be automatically canceled as well as being displayed on the monitor). , tillage depth setting device 16
The tilling depth set value set in is compared with the detected value from the tilling depth sensor 25, which detects the tilling depth by detecting the rocking posture of the rear cover 24 of the working section 2, and it is determined that these values match. The control valve is switched in response to a control command from the control unit 11 to move the hydraulic lift arm 21 up and down, thereby achieving automatic plowing depth control. Furthermore, if you want to perform automatic slope control, such as when cultivating sloped land, press the automatic slope switch 17 (displayed on the monitor) and operate the slope setting device 15 to set the desired slope state. Then, this set value is compared with a value detected by a tilt detection sensor (not shown), and control is performed by the control unit 11 so that these values match, thereby performing automatic tilt control. In this way, the posture of the working unit 2 is controlled. Note that 26 is a grip (handrail) provided on the fender 4, and 28 is a main gear shift lever.

In the embodiment of the present invention constructed as described above, as described above, control such as position control, automatic plowing depth control, automatic slope control, etc. can be performed at will by switching switches. , these controls are performed by a control section 11 configured using a microcomputer. Moreover, in this case, the height adjustment of the working part 2 by position control is performed by lever operation of the position control lever 19, and therefore, the height control is performed by a microcomputer. However, its height can be adjusted using the lever operation method used in conventional mechanical ones.
The height of the working part 2 can be controlled according to field conditions. Moreover, since the lever operation of the position control lever 19 can be performed by displacement operation between the forward lying position and the rear standing position, the height adjustment operation becomes natural and tasks such as going around the headland are easy. This can significantly improve operability.

Moreover, the operating range of the position control lever 19 can be adjusted by sliding the set position of the stopper 19b back and forth, so that operations can be performed at will depending on the field conditions. This can improve operability.

In addition, the position control lever 19
At the rear of the work section 2, switches for performing other control operations are concentrated.
The control can be concentrated at a position close to the position control lever 19, and therefore quick and accurate control can be performed.

Furthermore, the above position control lever 1
The control operation parts such as 9 are centrally arranged on the cover body 13 that covers the groove part 10 formed in the fender 4, but this control operation part is completely separated from the rear wheel 8 side by the groove part 10. As a sealed structure, the fender 4 itself protects the control operation section from mud and the like. For this reason, there is no need for the control operation section to be completely sealed using a box or the like to protect it from mud, etc., as in the case where the control operation section is assembled into the opening of the fender, and the control operation section can be operated by effectively utilizing the fender 4 itself. As a result, the fender 4 itself can be effectively used as a protection member for the control operation section.

Furthermore, a concave groove portion 10 in which a control operation section is arranged.
Since the driver's seat 6 side is open, the lead wire drawn out from the control operation section can be easily drawn into the interior of the aircraft within a short distance. There is no need to take any consideration to drawing wires into the body, and as a result, there is no need to seal these openings, resulting in a significant simplification of structure and ease of assembly.

[Operations and Effects] In summary, since the present invention is constructed as described above, although the working section is controlled by a microcomputer, the height control of the working section is not as easy as conventional methods. The lever system uses the same position control lever that is used for mechanical control, and the lever operation of this position control lever 19 can be performed by displacement operation between the forward lying posture and the backward standing posture. Therefore, the height adjustment operation becomes natural, and the height control operation can be performed in accordance with the actual work situation.
Since the other control operation parts are concentrated on the rear side of this position control lever, the operability of the working part control including the position control lever is extremely good. Work such as aircraft rotation can be performed quickly and accurately.

Moreover, the control operation section has a sealed structure that is completely isolated from the running wheel side by a groove formed in the fender, so that the fender itself protects the control operation section from mud etc. become. Therefore, there is no need to use a box to completely seal the control operation part to protect it from mud, etc., and the fender itself can be effectively used to protect the control operation part. can be effectively used as a protection member for the control operation section.

Furthermore, since the concave groove in which the control operation section is placed is open on the driver's seat side, the lead wire drawn out from the control operation section can be easily drawn into the interior of the machine over a short distance. There is no need to create openings in the fender and draw the lead wires inside the fuselage, and as a result, there is no need to seal these openings, which significantly simplifies the structure and ease of assembly. can be measured.

[Brief explanation of the drawing]

The drawings show an embodiment of the arrangement structure of the control operation section in an agricultural tractor according to the present invention, in which FIG. 1 is an overall side view of the agricultural tractor, FIG. 2 is an overall plan view of the same, and FIG. 3 is an overall side view of the agricultural tractor. Figure 4 is a rear view of the main parts, Figure 4 is a side sectional view of the main parts, Figure 5 is an enlarged plan view of the main parts of the fender, Figure 6 is a vertical cross-sectional view of the same as above, Figure 7 is a perspective rear view of the driver's seat, Figure 8 The figure is a side view of the working part, No. 9
The figure is a plan view of the main part of the same as above, and FIG. 10 is a flowchart. In the figure, 1 is a traveling body, 2 is a working part, 4 is a fender, 10 is a groove part, 11 is a control part, 14 to 18
19 is a switch, and 19 is a position control lever.

Claims (1)

[Claims] 1. A microcomputer is used to perform position control that controls the height of a working section provided on the traveling machine based on lever position adjustment of the position control lever, and other controls such as plowing depth control. On the other hand, in a field working machine that is provided with a fender that is disposed on the side of the driver's seat of the traveling machine and has surface parts that cover at least the upper and front sides of the traveling wheels and the side of the driver's seat, the upper surface part of the fender and At the top of the corner formed by the front and side surfaces of the driver's seat, there is a wall that protrudes toward the running wheels and is open at the front, above, and inward in the left and right direction, and is shaped like a standing wall at the rear and outward in the left and right direction. A step-shaped recessed groove having an enclosed groove bottom is formed, and the recessed groove is covered with a cover body that is attached to the fender from the top surface side, and the cover body is provided at a corner position between the fender top surface and the front surface. In the corresponding position,
Control in an agricultural tractor, characterized in that the position control lever is mounted so as to be displaceable from a forward lying position to a rear standing position, and the other control operation part is arranged behind the position control lever and the mounting part of the cover body. Operation unit layout structure.