JP2000333502A - Cover for rotary tilling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover for a rotary tilling apparatus, which has solved such a problem that since in a conventional technique, when a space between the rear end part of a main cover and the front end part of a rear cover is connected by an elastic plate such as rubber, etc., a constitution in which the main cover and the rear cover are fixed in a stationary state not to move them in the longitudinal direction is applied, in the case of tilling a field leaving a large amount of weeds, weeds stagnated in the interior of a tilling apparatus during a tilling operation push up the elastic plate, unevenness is formed on the surface of tilled soil and soil can not be tilled levelly. SOLUTION: The top side of a tilling apparatus 12 is covered with a main-cover 15 and the rear part side of the tilling apparatus 12 is covered with a rear cover 16. A space between the rear end part of the main cover 15 and the front end part of the rear cover 16 is connected by an elastic plate 23, the rear cover 16 is moved and adjusted in the longitudinal direction and the slackness of the elastic plate 23 can be adjusted. In a field of a small amount of weeds, the rear cover 16 is moved forward, the elastic plate 23 is provided with slackness and tilling operation is carried out. In a field of a large amount of weeds, the rear cover 16 is moved backward, the slackness of the elastic plate 23 is reduced and tilling operation is carried out. Consequently, in the field of a small amount of weeds, tilling operation is performed while finely grinding soil and uniforming, expanding and softening the surface of tilled soil. In the field of a large amount of weeds, weeds are excellently ground, the flexural movement of the elastic plate 23 upward is limited and tilling operation can be performed while preventing the unevenness on the surface of soil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cover for a rotary tilling device.

[0002]

2. Description of the Related Art One of the covers of a conventional rotary cultivator is covered with a main cover on the upper side of the cultivator and a rear cover on the rear side of the cultivator, and the rear end of the main cover and the front end of the rear cover. Some parts are connected by an elastic plate such as rubber.

[0003]

In the prior art, when the rear end of the main cover and the front end of the rear cover are connected by an elastic plate made of rubber or the like, the main cover and the rear cover are connected. When tilling a field with lots of grass, the stagnant grass inside the tilling device pushes up the elastic plate during the tilling work, and the There was a problem that unevenness was formed and the tillage could not be evenly plowed.

Accordingly, the present invention is to solve such a problem.

[0005]

SUMMARY OF THE INVENTION In order to solve the above technical problem, the invention is to cover the upper side of the tilling device 12 with a main cover 15 and to cover the rear side of the tilling device 12 with a rear cover 1.
6, the rear end of the main cover 15 and the rear cover 16
In the rotary tillage device connected to the front end of the rotary cover by the elastic plate 23, the main cover 15 or the rear cover 1
6 is configured to be movable in the front-rear direction so that the slackness of the elastic plate 23 can be adjusted.

[0006]

The rear end of the main cover 15 and the front end of the rear cover 16 are connected by an elastic plate 23 made of rubber or the like, so that the main cover 15, the elastic plate 23 and the rear cover 16 are connected. The tilling device 12 is covered with the ash, and the tilled soil is crushed in these covers. When tilling work in a field with little grass, for example, the rear cover 16 is moved to the front side to allow the elastic plate body 23 to be slackened before tilling work. Then, the interval between the tilling device 12 and the rear cover 16 becomes small, so that the tilling operation can be performed while the excavated soil is carried around many times and the soil is finely crushed.

Further, when tilling work in a field with many grasses, the rear cover 16 is moved to the rear side, and the elastic plate 23 is moved.
Tillage work with less slack. Then, since the foot of the tillage device 12 is wide and the elastic plate 23 has little slack, even if the grass stagnates in the foot, the tillage device 12 can be used.
Since the excavated earth mass is directly blown toward the rear cover 16 while crushing the grass little by little without being caught at one time, the excavated earth mass is roughly raised and less wrapped around the grass, and tilling work can be performed while preventing irregularities on the soil surface.

[0008]

Embodiments of the present invention will be described below. The embodiment shown in FIGS. 1 to 4 will be described. A rotary tilling device 2 is attached to the rear of the body 1 of the agricultural tractor so as to be able to move up and down. A hitch 3 is fixed to the rear upper portion of the fuselage 1 and at the center in the left and right directions, and the front end of the top link 4 is pivotally connected to the hitch 3 to form the fuselage 1
The front ends of the left and right lower links 5 and 5 are pivotally connected to the lower rear portion and to the left and right sides.

The rotary tilling apparatus 2 is connected to a transmission case 6 to which power is transmitted from the body 1, left and right beams 7, 7 extending from the transmission case 6 to both left and right sides, and ends of the left beam 7. A side transmission case 8, a side plate 9 connected to an end of the right beam 7, a tilling shaft 10, and a tilling claw 11, which are mounted on the lower end of the side transmission case 8 and the side plate 9. Tillage device 12, left and right reinforcement links 13, 13 attached to the upper front side of transmission case 6, mast 1 attached to transmission case 6 and left and right reinforcement links 13, 13.
4, a main cover 15 covering the upper part of the tillage device 12, a rear cover 16 covering the rear part of the tillage device 12, and the like.

A sub-plate 15b is mounted on each of the left and right sides of the main cover 15, and a lower end of the sub-plate 15b is mounted on the tilling shaft 10 via a rotating metal 15c. The bracket of the transmission case 6 pivotally supports the upper end of a screw-type telescopic rotation adjusting device 59, and pivotally connects the lower end of the rotation adjusting device 59 to the rear end of the main cover 15 to rotate the rotation. By operating the moving handle 60, the rotation adjusting device 59 can be expanded and contracted to adjust the rotation of the main cover 15 about the cultivation shaft 10.

A mast 14 is provided at the rear end of the top link 4.
Of the left and right lower links 5, 5 are attached to the support plates 17, 1 on the left and right beams 7, 7 side.
7 is pivotally connected. Left and right lift arms 18, 18 are attached to the rear upper portion of the body 1 so as to be able to move up and down, and upper ends of lift rods 19, 19 are connected to the rear ends of the lift arms 18, 18, respectively. The left and right lower links 5 and 5 are connected to the lower end of the. Thus, the rotary tillage device 2 moves up and down by rotating the left and right lift arms 18 and 18 up and down. Further, power is transmitted from the PTO shaft 20 at the rear of the body 1 to the tilling input shaft 22 of the rotary tilling device 2 via the universal joint 21.

Next, the cover configuration of the rotary tilling apparatus 2 will be described. A flexible elastic plate 23 made of rubber or the like is connected between the rear end of the main cover 15 and the front end of the rear cover 16. A bracket 24 is provided at the rear center of the main cover so as to be movable in the front-rear direction. The front end of a double-acting cylinder 28 that expands and contracts by, for example, hydraulic pressure is pivotally connected to the bracket 24. The front end of the front support rod 25 is pivotally connected to the portion so as to be vertically rotatable. The left and right rear support rods 26, 26 extend from the rear end of the front support rod 25, and the left and right rear support rods 26, 26 extend.
26 is connected to the left / right connecting portion 16 of the rear cover 16.
a, 16a so as to be adjustable in the front-rear direction. Also,
The left and right sides of the main cover 15 and the rear cover 16 are connected by left and right leaf springs 27, 27 curved upward.

Next, a configuration for adjusting and supporting the rear cover 16 will be described. As shown in FIG.
Left and right lower stays 29, 29 provided on the upper part of 6
, The lower ends of the pressing rods 30, 30 are pivotally connected, and the left and right upper stays 31, 31 projecting toward the rear center of the main cover 15 support the leg 32a of the top 32,
The pressing rod 30 is supported by the hole 32b of the top 32 so as to be vertically movable. Stopper upper bolt 3 of pressing rod 30
An upper pressing spring 34 is interposed between the frame 3 and the top 32, and a lower pressing spring 36 is interposed between the pressing rod 30 and the lower stopper bolt 35 of the pressing rod 30.

The pressing rod 30 is provided with a plurality of locking grooves 30a in the longitudinal direction, and the stopper 37 provided on the top 32 is locked in the locking groove 30a. The rear cover 16 is fixed to the upper stay 31 and can be brought into a fixed state in which the rear cover 16 does not move up and down. The pressing rod 30 is free by releasing the stopper 37 from the locking groove 30a, and the pressing rod 30 moves up and down by the vertical movement of the rear cover 16. Also, by adjusting the positions of the stopper upper bolt 33 and the stopper lower bolt 35 with respect to the pressing rod 30, the pressing force of the pressing upper spring 34 and the pressing lower spring 36 can be adjusted.

However, when tilling work is performed in a field with little grass, the double-acting cylinder 28 is shortened, the distance between the tilling device 12 and the rear cover 16 is reduced, and the elastic plate 23
By increasing the slack in the tilling, the tilling work can be performed while finely crushing the tilling soil and making the surface height uniform. Further, when tilling a field with a lot of grass such as a field after harvesting rush, the double-acting cylinder 28 is extended to widen the gap between the tilling device 12 and the rear cover 16 and to loosen the elastic plate 23. To reduce the escape to the upper part of the elastic plate 23 while crushing the grass little by little by widening the foot and reducing the unevenness of the cultivated soil surface, and evenly tilling the surface height Can be.

A potentiometer (not shown) for detecting the tillage depth is attached to the front support rod 25 of the rotary tillage device 2 to detect the tillage depth. When the tillage depth becomes shallow, a control unit (not shown) is provided. Control to lower the left and right lift arms 18, 18 in accordance with a command from the controller to maintain a predetermined tillage depth. Further, for example, the amount of grass is detected by a color sensor (not shown).
May be extended to reduce the slackness of the elastic plate 23, and when there are few grasses, the double-acting cylinder 28 may be shortened to increase the slackness of the elastic plate 23. The rotation adjusting device 59 can be extended and contracted by a motor (not shown). When there are many grasses, the rotation adjusting device 59 is extended and the main cover 15 is moved rearward and downward by a command from the control unit. In addition to the adjustment, the double-acting cylinder 28 may be extended to control the rear cover 16 to move rearward. Then, it is possible to perform the tilling operation in which the grass is satisfactorily pulverized by the tilling device 12 and the main cover 16 and the unevenness of the cultivated soil surface is prevented.

Next, the embodiment shown in FIG. 5 will be described. A bracket 24 is attached to the main cover 15 so as to be movable in the front-rear direction. A front end of a front support rod 25 is pivotally connected to the bracket 24 so as to be vertically rotatable, and rear ends of left and right rear support rods 26, 26. Is connected to the left / right connecting portion of the rear cover 16 so as to be adjustable in the front-rear direction.

On the left and right sides of the main cover 15, for example, left and right double-acting cylinders 28, 28, which are electrically driven and extend and contract in the front-rear direction, are arranged.
Attach the front ends of 7, 27 to the double acting cylinders 28, 28,
The rear ends of the left and right leaf springs 27 are pivotally connected to the left and right sides of the rear cover 16. Thus, when the left and right double-acting cylinders 28, 28 are shortened and the rear cover 16 is moved forward and adjusted, the elastic plate 23 is loosened, and the regulating force of the tilling is weakened. Tilling work can be performed while softening.

When the double-acting cylinders 28, 28 are extended and the rear cover 16 is adjusted to move rearward, the elastic plate 2
3, the plowing work of the tilling device 12 can be widened, and the cultivation work can be performed while improving the pulverization of the grass while reducing the upward bent escape and preventing the unevenness of the cultivated soil surface. Next, the stand 40 with casters of the rotary tillage device 2 will be described with reference to FIG.

The rotary tilling apparatus 2 of this embodiment comprises a transmission case 6, left and right beams 7, 7, side transmission cases 8,
A side plate (not shown), a tilling device 12, left and right reinforcing links 13, 13, a mast 14 attached to the transmission case 6, a main cover 15, a rear cover 16, and a rear hitch 53 that can be adjusted up and down by an up and down adjustment device 38;
Gauge wheel 3 attached to rear hitch 53
9 and the like. In addition, rotary tilling device 2
Support pipes 47, 47 on the left and right sides of the main cover 15
Are rotatably connected in the front-rear direction by support pins 48.

The stand 40 with casters includes a stand frame 41, a caster support 42 pivotally supported at the lower end of the stand frame 41, front and rear casters 43, 43 attached to the front and rear of the caster support 42, and a stand. Adjusting hole 44 attached to frame 41
It is constituted by an adjusting plate 44 having a, an adjusting arm 45 attached to the caster support 42, and an adjusting pin 46.

As described above, the adjusting plate 44 having the adjusting hole 44a, the adjusting arm 45 on the caster support 42 side,
Since the adjustment angle of the caster support body 42 with respect to the stand frame 41 can be adjusted by the adjustment pin 46, it can be commonly used for the large and small type rotary tilling apparatus 2. In adjusting the mounting angle, the stand frame 41 and the caster support 42 may be connected by an arm with a turnbuckle.

When the rotary plow 2 is supported by the caster stand 40, the support pipe 47
Then, the upper end of the stand frame 41 is inserted and fixed with the support pins 48. Then, the rotary plow 2 is supported by the front and rear casters 43 and 43 of the caster stand 40 in a raised state and in a horizontal posture, so that the connection to the tractor can be facilitated.

In the working state, the support pipe 4
The stand 40 with casters is removed from 7, the upper end of the stand frame 41 is inserted into the support pipe 47 from above, and fixed with the support pins 48, and the stand 40 with casters is mounted upright on the rotary tillage device 2. Also, positioning holes 41b of the stand frame 41
The positioning pin 50 is provided between the main cover 15 and the adjustment hole 15a.
By inserting the rear caster 43, the position of the rear caster 43 can be changed up and down, interference with the member on the rotary plow 2 can be prevented, and the stand 40 with casters can be always mounted on the rotary plow 2. .

Next, another embodiment of the stand with casters 40 will be described with reference to FIG. This example is
Although the stand 40 has a simple caster, the rotary plow 2 is easily and easily connected to various tractors by applying a special device to the rotary plow 2.

The rotary tilling apparatus 2 of this embodiment comprises a transmission case 6, left and right beams 7, 7, side transmission cases 8,
Side plate 9, tillage device 12, mast 14 attached to transmission case 6, main cover 15, elastic plate 2
3, a rear cover 16, a rear hitch 53 that can be adjusted up and down by an up-down adjusting device 38, a slide hitch 58 attached to the rear hitch 53, and the like.

The stand 40 with casters comprises an L-shaped stand frame 41, and front and rear casters 43, 43 attached to the front and rear lower ends of the stand frame 41. The rotary tilling device 2 is raised by the lift arm of the tractor, and the upper portions of the stand frames 41, 41 of the left and right caster stands 40, 40 are attached to the left and right sides of the rotary tilling device 2. Next, when the lift arm of the tractor is lowered and the rotary tillage device 2 is lowered, the rotary tillage device 2 is supported in a state where it is lifted by the stands 40 and 40 with casters.

In attaching the mast 14 to the transmission case 6, the mast 14 is fixedly connected to the mast fulcrum pin 51 and the mast fixing pin 52, or
By removing the mast fixing pin 52, the mast 14 can be rotated around the mast fulcrum pin 51. Also,
In attaching the rear hitch 53 to the connecting plate 6a of the transmission case 6, the front connecting portion 53a of the rear hitch 53 is pivotally connected by a rear hitch fulcrum pin 54, and the fixing hole 53 is connected to the front connecting portion 53a near the pivoting portion and the connecting plate 6a.
b and 6b are provided respectively. Then, both fixing holes 53
a, 6b, the fixing pin 55 is inserted, and the rear hitch 53 is inserted.
Is fixed to the transmission case 6 or the fixing pin 55 is removed, so that the rear hitch 53 can be rotated.

Between the mast 14 and the rear hitch 53,
By connecting with a screw type expanding / lowering vertical adjusting device 56 and operating a rear hitch vertical adjusting handle 38, the vertical adjusting device 56 can be expanded and contracted. When the tractor is connected to the rotary tillage device 2 via the top link 4 and the left and right lower links 5 and 5 at the three points, the rotary tillage device 2 is connected due to the relationship between the tire diameter of the tractor and the unevenness of the road surface. It is necessary to adjust the forward leaning posture.

At this time, the left and right lower links 5, 5 are connected to the lower link pins 5 on both right and left sides of the rotary tillage device 2.
757, and then remove the mast fixing pin 52,
The mast 14 can be rotated, and the front connecting portion 53a of the rear hitch 53 and the fixing holes 53 of the connecting plate 6a are formed.
The fixing pin 55 is inserted into b, 6b, and the rear hitch 53 is fixed to the transmission case 6. Next, the rear hitch vertical adjustment handle 38 is rotated to operate the vertical adjustment device 5.
The top link can be easily connected by expanding and contracting the 6 and adjusting the position of the front hole 14a of the mast 14 up and down.

[Brief description of the drawings]

FIG. 1 is a side view of a rotary tillage device.

FIG. 2 is a perspective view of a main part.

FIG. 3 is a side view showing an operation state.

FIG. 4 is a sectional view of a main part.

FIG. 5 is a perspective view and a side view.

FIG. 6 is a side view.

FIG. 7 is a perspective view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tractor body, 2 ... Rotary tilling device, 3 ... Hitch, 4 ... Top link, 5 ... Left / right lower link, 6 ...
Transmission case, 6a: connecting plate, 6b: fixing hole, 7: left / right beam, 8: side transmission case, 9: side plate,
10: tillage axis, 11: tillage claw, 12: tillage device, 13 ...
Left and right reinforcement links, 14: mast, 15: main cover, 1
6 rear cover, 17 support plate, 18 left / right lift arm, 19 lift rod, 20 PTO shaft,
21: universal joint, 22: tilling input shaft, 23: elastic plate,
24 bracket, 25 front support rod, 26 left / right rear support rod, 27 left / right leaf spring, 28 double acting cylinder, 29 lower stay, 30 pressing rod, 30a locking groove, 31 ... upper stay, 32 ... frame, 32a ... leg,
32b: Hole, 33: Stopper upper bolt, 34: Pressing upper spring, 35: Stopper lower bolt, 36: Pressing lower spring, 37: Stopper, 38: Vertical adjusting device, 39: Gegi foil, 40: Stand with casters, 41 ... caster frame, 42 ... caster support, 43 ... front and rear casters, 44 ... adjustment plate, 45 ... adjustment arm, 46 ... adjustment pin, 47 ... support pipe, 48 ... support pin, 50 ... positioning pin, 51 ... mast A fulcrum pin, 52: a mast fixing pin, 53: a rear hitch, 54: a rear hitch fulcrum pin, 55: a fixing pin, 56: a vertical adjustment device, 57: a lower link pin.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B033 AA05 AB01 AB11 AC05 BA01 BB02 DB04 DB34 DB35 DB37 DB41 DB44 ED01 ED02

Claims (1)

[Claims] An upper portion of the tilling device is covered with a main cover, a rear portion of the tilling device is covered with a rear cover, and a space between a rear end of the main cover and a front end of the rear cover is provided. A rotary tilling device connected by an elastic plate 23, wherein the main cover 15 or the rear cover 16 is moved in the front-rear direction to adjust the slack of the elastic plate 23, and the cover is provided. .