JPH0159841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coulter adjustment device for a reversible plow, and more particularly to a coulter adjustment device mounted on a mast frame.

In the conventionally known bottom plow equipment, the bottom only inverts the soil on the right side in the direction of travel. Therefore, to plow, first plow in the center of the field (if the field is large, at an appropriate location). After the opening work is carried out in the field, the desired work is carried out using the rotary tillage method.Therefore, in the field after the work, the direction of soil bundling is symmetrical to the left and right of the groove created when opening the field. The reality is that tilling and leveling the land requires time and effort, and the headland must be turned over at the end, and the work efficiency itself is not very good.

Therefore, if plowing work in the field can be done continuously, it will contribute to improving work efficiency.
Although reversible plow devices have been proposed,
This type of plow equipment consists of a plow frame that is equipped with a bottom and can be reversed, and a mast frame that is attached to the tractor by a three-point link and cannot be reversed. The problem is the installation of the coulter. As for the simplest installation structure, there is no problem if the coulter is also installed on the plow frame side and used in reverse, but this has the disadvantage that the length from the crossbar becomes extremely long and the work balance becomes poor. be.

Therefore, since the first coulter corresponding to the first bottom is located at the frontmost side, the problem is solved by attaching this coulter to the mast frame that does not turn over, but the plowing width due to the bottom is affected by the tread of the tractor, so the position of the coulter must be adjusted in response to the adjustment of the bottom position, and in order to satisfy this, the mechanism is quite complex. It's reality.

Therefore, this invention eliminates the problem of adjusting the coulter position even when the plow is reversed.
Moreover, the present invention aims to provide a coulter adjustment device that has a simple configuration and can be easily adjusted.For this purpose, the stem of the coulter is supported on a non-rotating member of the frame constituting the plow that does not rotate even when the reversing operation is performed. A movable angle cone for selecting the inclination of the coulter is mounted on this stem support part, and by forcibly pressing the stem against the angle cone during work, the coulter is tilted at an angle corresponding to the angle cone. In addition, the present invention is characterized in that the offset amount of the coulter can be selected by moving the angle cone.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to embodiments shown in the accompanying drawings. In the figure, reference numeral 10 indicates a plow frame, and this plow frame 10
has a front frame 11 located at the front, a slide frame 12 is attached along this front frame 11, and a rear frame 13 whose end is pivoted diagonally rearward from this slide frame 12 by a pivot shaft 12a. is extended, and bottoms 14 are attached to the top and bottom of this rear frame 13. The plowing directions of the upper and lower bottoms 14 are opposite to each other, and a turnbuckle 15 is provided between the rear frame 13 and the slide frame 12.
The rear frame 13 in plan view due to the expansion and contraction of
The angle between the slide frame 12 and the slide frame 12 can be adjusted, and the determined posture can be fixed. The slide frame 12 is moved along the plowing width direction by an offset cylinder 17, and second coulters 18 are attached vertically in front of upper and lower second bottoms attached to the rear frame 13.

Further, one end of a rotational support shaft 16 is fixed to the front side of the front frame 11, and this rotational support shaft is supported by a bearing of a mast frame 20 including a mast, etc., which will be described later.

That is, the mast frame 20 has a cross bar 21 along the plow width direction, and a mast 22 is vertically erected in a direction perpendicular to the cross bar 21, and the base of the mast 22 is connected to the rotation direction. It is configured to be fixed to a tubular bearing body 23 that supports the support shaft 16. The rotary support shaft 16 is fitted and supported in this bearing body 23, so that the rotary support shaft 16 can rotate. A coulter stem support part 24 is provided at the end of the bearing body 23, and this is made up of arc-shaped supporting frames 24a, 24a that are arranged facing each other at appropriate intervals in the vertical direction.
4a has a structure in which small holes 24c are bored at a fixed pitch.

An angle cone 25 in the shape of a square pyramid is provided at both ends of the stem support portion 24, and this angle cone 25 has a pin hole penetrating in the vertical direction, and a small hole drilled in the support frames 24a, 24a. 24c
The fixing pin 25a is invaginated from the stem support portion 24.
The position of the angle cone 25 can be set relative to the angle cone 25. In addition, angle cone 25
The slopes forming the periphery of the coulter have different upright angles.
You can now choose your street.

A crank-shaped stem 27 that supports the coulter 26 via a coulter arm 26a passes through the stem support portion 24, and the stem 27 has partially circular upper and lower edges and straight edges on both sides. The inclined guide piece 27a is fixed, and the end thereof is extended to the rear of the tractor, and is rotatably supported by a bearing 23a provided in the bearing body 23 along both vertical and horizontal surfaces. There is. In addition, a ball and socket joint 28 is attached to the portion of the stem 27 near the bearing 23a.
, so that the stem 27 itself can be bent within an appropriate range. This ball and socket joint 28 includes:
A piston rod 42 of a hydraulic cylinder 41 constituting a crimping mechanism 40 which is pivotally attached to the cross bar 21 is connected, and the force of pushing and pulling against the stem 27 due to the expansion and contraction of the piston rod by the hydraulic cylinder 41 is It is now possible to add

A 3-position, 4-way type switching valve 29 is attached to the bearing body 23, and a 2-mode switching cam 161 fixed to the rotating shaft 16 is attached to the spool 29a of this switching valve 29. The end of the stem 29b, which is continuous with the spool 29a, is constantly pressed to the switching cam 161 via a roller 29c.

The centers of the switching cam 161 and the switching valve 29 are on the same straight line, and the top of the reversing drive cylinder 30 is pivoted by a pivot 32 on a plane including this straight line.
1 is located on the front frame 11 with its end perpendicular to the axis of the rotating shaft 16, and is pivoted to a pivot 11a at a position away from the axis.
The pivot point of the reversing drive cylinder 30 can be moved along the height direction of the mast 22 only by the length of the elongated hole 22a by screwing in an adjustment screw 33.

It is necessary that the coulter 26 is located in front of the point position of the first bottom 14,
It is necessary to adjust the coulter depending on the depth of the groove, in other words, the inclination of the tractor during plowing, and the size of the tractor tread. Therefore, even if the tractor tilts, the coulter 2
6 must be tilted with respect to the tractor so that it can rotate within a vertical plane, and the angle of inclination is determined by selecting an appropriate slope of the angle cone 25 attached to the stem support 24. .
That is, the inclined guide piece 2 fixed to the stem 27
Since the linear side edge of the stem 7a is brought into close contact with the inclined surface of the angle cone 25, the stem 27 rotates about the bearing portion 23a along a vertical plane in the width direction of the tractor, giving an inclination to the coulter 26. The inclined guide piece 27a of the stem 27 is attached to the angle cone 2.
The hydraulic cylinder 41 forming the output mechanism 40 and its piston rod 42 are brought into close contact with the inclined surface of 5.
Do this with the output of

Further, in conjunction with the reversible plow reversing operation, it is necessary to offset the coulter 26 onto the point extension line of the first bottom 19, and the output of the crimping mechanism 40 is also used as the power source for this offset.

In such a case, the base of the stem 27 is connected to the bearing part 2.
3a, it is rotatable, and since there is a ball-and-socket joint 28 in the middle, it can be rotated and bent freely.

Angle cone 25 relative to stem support 24
The movement of the stem support part 24 and angle cone 2
Once the fixing pin 25 penetrating through the hole 24c is removed, the angle cone 25 is freed, and after moving it appropriately, select the small hole 24c and insert the fixing pin 25.
A is again inserted into the small hole or the hole penetrating the angle cone 25 and fixed. This fixation is performed by screwing a nut into a male thread formed at the lower end of the fixing pin 25a, but if the inclined surface of the angle cone 25 is selected, it is accomplished by simply loosening the nut.

As is clear from the above description, the coulter adjustment device for a reversible plow of the present invention includes a stem support portion provided in a non-rotating component among the components of a reversible plow, and a coulter provided along the stem support portion. The stem is made movable, and the angle cone is provided near both ends of the stem support so that it can be moved freely and fixed, and hydraulic pressure is used as a power source to move the stem and rotate the coulter in an inclined direction. Since the present invention is configured with an output mechanism such as the above, it is possible to easily adjust the offset of the coulter associated with a reversible plow or the inclination of the coulter in opposition to the inclination of the tractor due to the depth of the furrow.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the coulter adjustment device for a reversible plow according to the present invention, in which FIG. 1 is a schematic side view, FIG. 2 is a plan view thereof, FIG. 3 is a side view of the reversing drive device, and FIG. Figure 3 is a sectional view taken along the line, Figure 5 is a partially cutaway plan view showing the coulter adjustment device, Figure 6 is an explanatory view of the work as seen from the tractor side, and Figure 7 is an inverted view of the tractor side. FIG. 8 is an explanatory diagram showing the pressure oil system of the reversing drive device. 10... Plow frame, 11... Front frame, 12... Slide frame, 13... Rear frame, 14... Bottom, 15... Turnbuckle, 16... Rotating shaft, 17... Offset cylinder, 18... ...coulter, 20...mast frame, 21...crossbar, 22...mast, 23...bearing body, 24...bearing body, 24...
Stem support part, 25...Angle cone, 25a
... Fixed pin, 26 ... Coulter, 26a ... Coulter arm, 27 ... Stem, 27a ... Inclined guide piece, 28 ... Ball joint, 29 ... Switching valve, 30 ... Reversing drive cylinder, 40...Output mechanism, 41...Hydraulic cylinder, 42...Piston rod.

Claims (1)

[Claims] 1. In a reversible plow configured by installing plows symmetrically above and below a frame, the coulter stem support part provided on the non-rotating component and the coulter stem support part are movably attached to the coulter stem support part, and A coulter comprising: an angle cone which has different slopes and which selects the inclination angle of the coulter; and an output mechanism which moves and presses a stem between the angle cones and selects an offset amount. Adjustment device.