JPS5843707A - Plough depth controller in tractor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for maintaining the tillage resistance at a constant level (that is, controlling the draft) using a ground work machine such as a plow. The present invention relates to a plowing depth control device for quickly lowering a work implement to a desired plowing depth.

In plowing work using draft control, hold the position lever for lifting and lowering the work equipment in the extreme position of lowering the work equipment, and operate the draft lever for draft control to raise and lower the ground work equipment near the headland. As shown in Figure 1, when the plowing operation is started, the distance from the tilling start point to the desired plowing depth becomes longer, but this is due to the feedback of the tilling resistance. This is due to what is done to the draft control mechanism. As a measure to shorten this distance (g) as much as possible, we moved the draft lever to the position of maximum resistance.
In other words, move the work equipment to the extreme position of lowering it,
When the plowing depth is close to the desired value, the draft lever is returned to the desired position.
Manual operations based on such predictions are difficult to perform successfully.

Therefore, in this invention, a control unit is provided to operate the hydraulic lifting mechanism of the ground work machine in the downward direction of the ground work machine for a set time, and the operation of this control unit is started by pressing the switch within the rotational operation locus of the draft lever. It is configured by being attached to a lever stopper that is provided with a position that can be adjusted freely, and by the action of the control unit, [after moving the ground work machine in a large downward direction, it automatically stabilizes at the desired plowing depth. It was devised to do so.

To explain the C1 embodiment, as shown in FIG.
A hydraulic pulp (2) is provided inside the cylinder case (1) attached to the machine frame of the tractor, and a slider (2) is provided to move in and out of the hydraulic valve (2).
3), the pressure fluid is supplied to, discharged from, and stopped from the hydraulic cylinder (4). That is, if the slider (3), which is always biased by the spring (5) so as to protrude rightward from the hydraulic pulp (2), is moved, for example, in the direction of arrow 11A, the hydraulic cylinder ( As the hydraulic piston (6) of 4) protrudes to the right in the figure, pressure fluid is supplied from the hydraulic pulp (2) to the hydraulic cylinder (4), and the hydraulic piston (6) K is aligned with the lift crank (7) k, so the lift shaft (8) K
The fixed left and right lift arms (9) (9) perform upward rotation, and the hydraulic lifting mechanism (5) lifts the ground work equipment suspended from these lift arms (9) (9).
It constitutes υ. Then, to the cylinder case (1),
For example, a rotating shaft (1
3 (Attach the draft lever 04 and the position lever 09 to 13, respectively, and fix the crank bin rlIQ? to one end of these rotational axes a and 3), and fix the crank pin as,
Draft link α barrel whose upper end is pivotally connected to a'n, actuator (21121) is attached to position/link a value, and the rear face of arm (c) which is pivotally connected to cylinder case (1) at the bottom. The actuator (a) and Qυ are visible.

Then, the bottle protruding from the middle part of the position link α field is brought into contact with the cam (c) provided integrally with the lift crank (7), and one end is brought into contact with the rotating tip of the position link 0. Locked springs (A) Lock spring 1 (A) to the arm (C), and other springs (5) to the cylinder case (1), and move position lever 0!9, for example. If the position link a1 is rotated in the direction of the arrow B in Fig. 2, the position link a1 will rotate counterclockwise around the bottle that comes into contact with the force A (c), and the lower end actuator Cυ will move in the opposite direction. Move in the direction of line A,
Since the sliders (3) can be projected and moved in the same direction, the lift arms (9) (9) are rotated downward clockwise. At the same time, the cam □□□ also rotates clockwise, and the pin that comes into contact with this cam (2) moves the position link 09 to the crank pin i1.
? ), the lower end actuator 12D moves the slider (3) along the arrow A through the arm (to).
The hydraulic valve (2) stops supplying and discharging the pressure fluid and stops the downward rotation of the lift arms (9) (9).
K like this and position lever Q! Lower the ground working machine to the plowing depth specified by 19. In addition, the draft control mechanism for keeping the tilling resistance of the ground work machine constant has a draft rod (to) pivoted to the upper end of bracket 4 which is pivotally connected to the cylinder case (1) by a pin (to), and This draft rod (to) with a spring 0]) interposed between it and the case (1) is provided so as to be slidable only in the front and back direction with respect to the cylinder case (1).
Attach the bottle (to) to the lower end of the arm rod (to) fixed to the front end of the rod. (To) The rear end is loosely inserted into Bin C (3, and a spring ω is interposed between Bin C34) and C33, and the top link (To ) to the bracket C with a pin @, turn the position lever 09 fully in the direction of the arrow B so that the ground work implement O [is in the lowered position, and then turn the draft lever I. Identical arrows! If the position is rotated in the sB direction, the actuator (2) no longer comes into contact with the arm (to), and when the actuator (2) only exerts force and comes into contact with the arm (c), it becomes K, so this draft lever α4 The ground work machine (II) will descend to the position K indicated by , and the tilling work will be performed.At this time, if the tillage resistance acting on the ground work machine 4 becomes larger than the value set by the spring Gυ. The bracket rod that is pushed to the left in Figure 2 at the top link (to) pushes the draft rod (to) in the same direction, and therefore the rod (to) is pushed in the direction of arrow A. The arm (c) pushes the slider (3) in the same direction and raises the lift arm (9). In this way, the tilling resistance is increased with the tilling depth specified by the draft lever (14) as the lower limit. Ground work equipment (II
In a tractor configured to control the elevation of the electromagnetic solenoid 0I, as shown in an embodiment in FIG. (4 (When I is not energized, the draft link member is operated as described above according to the instructions of the draft lever α, but the electromagnetic solenoid (to)
When energized, the draft link 08 moves in the direction of the arrow C in Fig. 3, and the slider (
3) With the movement in the direction of arrow A, the hydraulic valve (2) is switched to lower the lift arm (9), and while this electromagnetic solenoid is energized, the operating rod is kept at 0υ. If you hold it in the position after the above movement and turn off the power, the operating rod will be 0.
υ moves back in the direction of arrow C, and the draft link (II) is operated as instructed by draft lever α. Also, as shown in Fig. 6, the handle of draft lever α (14 protrudes further outward from the guide groove (44a) provided on the outer peripheral part 04 of the lever guide (43), and its lower part fits into this guide groove (44a). ) 1:111 Insert the Bordeaux through the freely movable lever stopper Gi9, and insert the Bordeaux into the long groove (444) provided on the outer periphery (44)K along the guide groove (44-a). , by tightening the nut (4?) screwed into the bolt (T), the lever stopper) is fixed to the outer circumference (goods), and when the draft lever α4 force λ comes into contact with this lever stopper (4s) Ic , in order to operate the switch (S), in the illustrated example, this switch (for example, a proximity switch is used, one contact (Sl) is used as a lever stopper (c), and the other contact (S2) is used. ) are respectively attached to the handle part (14).Then, as shown in Fig. 4, for example, the setting time (1) consisting of a resistor C1) (R1), a variable capacitor (q, a diode plow, and a relay capacitor) can be changed. A timer (1) which is possible and has the input/output characteristics shown in FIG.
The power supply (F
J) is connected to 5 so that the electromagnetic solenoid 0o can be energized on and off, forming a control section consisting of this timer and an electromagnetic solenoid (40) connected to the draft link Ql with an operating rod (41). There is...

Since the plowing depth control device of the present invention is configured as described above, when starting plowing in the vicinity of the headland, only by rotating the draft lever (14) until it comes into contact with the lever strut/< (c). , the switch (S) is operated first, the operation of the control unit is started, and the set time (1) is reached.
Between +'z IIJ and 5, the hydraulic lift mechanism 0υ is controlled by the IIJ control unit so that the ground working machine Ql is in the downward direction, so that the ground working machine Q1 can quickly descend. After the set time (1), the control unit performs a return operation, and the hydraulic lifting mechanism aυ is also instructed by the draft lever (141).
The plowing depth returns to the predetermined plowing depth, and from this point on, draft control using the plowing resistance instructed by the draft lever I continues to be performed.

Therefore, in this invention, the ground working machine can be quickly and automatically lowered to a desired plowing depth by simply rotating the draft lever until it contacts the lever stopper. This invention makes it possible to eliminate the troublesome manual lowering and rotating operations and return operations, which are required in the conventional manual operations described above.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 and FIG. 4 are control circuit diagrams, FIG. 5 is an input/output characteristic diagram, and FIG. 6 is a perspective view of the vicinity of the draft lever. Explanation of symbols (1)...Cylinder case (2)...
・Hydraulic pulp (3)...Slider (4
)...Hydraulic cylinder (5) (a) @6f)@・
...Spring (6) ...Hydraulic piston (7)
...Lift crank (8) ...Lift shaft (9) ...Lift arm Q (1...
・・・Ground work machine aυ・・・Hydraulic lifting mechanism α
3 (II...Rotation axis (14)...Draft lever (14m)...Handle part 0!9...Position lever aeaη...Crank pin aF4...
...Draft link al...Position link (a) 00...actuator (2) Q leak (
B) [Yes] (B) (39...pin (to)...
・Arm (g)...Cam (2)・
......Bracket C11m...Draft rod (MJ...Arm rod (le-----...Rod (37)...Mast (to)...
...Top link (4G...Electromagnetic solenoid (40...Operating rod...Lever guide 144-...Outer periphery 0S...Lever Stopper (44a)... Guide groove (41...
・Bolt <448>・-Long groove (4?)・・
・・・・・・Natsuto (g)・・・・・・Pilling start point (g)・・・Plowing depth (g)・・・・・・
・Distance (S) - Switch (Sl)
(Sg)... Contact (q... Capacitor
(RJ)e)...ResistanceHowever...Diode
(1) Timer (3) Relay α → Normally open contact patent Applicant
Iseki Agricultural Machinery Co., Ltd. Figure 3 Figure 4 , □ Figure 5 Six-on

Claims (1)

[Claims] In a tractor configured such that the lifting position of a suspended ground work machine can be adjusted by rotating a draft lever of a hydraulic lifting mechanism, the hydraulic lifting mechanism is set. A tractor that is equipped with a control section that moves the ground work machine in the downward direction for a certain amount of time, and a switch that starts the operation of this control section is attached to a lever stopper that is adjustable in position within the rotation operation locus of the draft lever. tillage depth control device.