JPH09262008A - Weeder for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weeder for tractor, capable of simplifying attachment and detachment of the weeder from a tractor body and improving operability by bringing the weeder to the front side of the body. SOLUTION: A pair of a right and a left parallel link mechanisms 4 to be lifted and lowered by a lift cylinder 3 laid between the front end part of a parallel link 1 and a link hitch 2 connected to the tip of the parallel link are installed at both sides of the front part of a body 5. The link hitch 2 is equipped with an operation hitch 10 capable of fixing a tool bar 9 for arranging a weeder 8, capable of weeding by connecting the drive of front ground wheels 6 to a rear weeding rotor 7, along the right and the left rockingly around a rolling shaft 11 to constitute the objective weeder for a tractor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeder attached to a tractor.

[0002]

In a paddy weeder, when it is mounted in front of and behind a tractor, its overall length becomes long and its operability tends to deteriorate. Therefore, the present invention intends to mount the weeder so that it can be moved up and down as close to the front wheels as possible.

[0003]

According to the present invention, a pair of left and right parallel link mechanisms 4 which are lifted and lowered by a lift cylinder 3 provided between a front end portion of a parallel link 1 and a link hitch 2 connected to the tip end of the parallel link 1 are mounted on a vehicle body 5. A tool bar 9 for arranging the weed eliminator 8 across the left and right, which can be weeded by driving the front side ground wheel 6 in conjunction with the rear side weeding rotor 7, is attached to both sides of the front portion of the link hitch 2. The work hitch 10 is a weeding machine for a tractor in which the work hitch 10 is swingably provided around a rolling shaft 11.

[0004]

By expanding and contracting the lift cylinder 3, the weeder 8 can be raised and lowered with respect to the vehicle body 5 and can be placed in a working posture and a non-working posture. As the lift cylinder 3 expands and contracts, the angle between the link hitch 2 and the parallel link 1 is changed, whereby the parallel link 1 is rotated up and down, and the link hitch 2 is moved up and down on the front end portion of the vehicle body 5. Along with this, the work hitch 10 that can be freely rolled around the rolling shaft 11 is moved up and down, and the toolbar 9 on which the weeder 8 is placed can be raised to a non-working posture, or lowered to a grounding working posture. .

In this work posture when descending, the weeding rotor 7 is driven by the grounding rotation of each grounding wheel 6, and each weeding is performed. Toolbar 9 is rolling axis 11
Since it can swing freely around, if the ground resistance of each weeder 8 changes according to changes in the uneven surface of the soil surface, etc., it will be swung to the position of the left-right equilibrium state, and uniform weeding will be performed along the soil surface. You can

As described above, according to the present invention, the parallel link 1 is provided so as to be vertically movable from both left and right side portions of the vehicle body 5, and the lift cylinder 3 is provided between the front end portion and the link hitch 2. Since the hitch link 2 is grounded to the front end of the vehicle body 5 and can be moved up and down, the weeder 8 can be positioned and mounted below this, and the weeding rotor 7, the grounding wheel 6 and the like can be mounted on the vehicle body 5. It is possible to improve the operability by bringing the parallel link mechanism 1 into close contact with the vehicle body, simplify the structure for attaching and detaching the parallel link mechanism 4 such as the parallel link 1 to and from the vehicle body, and easily perform the attaching and detaching operation.

[0007]

[Example] The tractor body 5 is a steering wheel 1
This is a four-wheel drive traveling mode in which a front wheel 13 that can be steered by 2 and a rear wheel 15 mounted on a rear portion of a cockpit 14 are driven and driven by an internal engine under a front hood 16. Reference numeral 17 denotes a chemical liquid tank mounted so as to surround the cockpit 14 at the rear part of the vehicle body 5, and is driven by a pump P mounted at the rear lower part thereof to be pressure-fed to a spray nozzle (not shown) for spraying work. be able to.

A pair of left and right link brackets 18 are detachably attached to the front side of the hood 16 at the front of the vehicle body 5. Rear ends of a pair of upper and lower parallel links 1 are provided on each of the link brackets 18 so as to be vertically rotatable by link pins 19, and a link hitch 2 is provided between front ends of the parallel links 1.
Are rotatably provided vertically by link pins 20, and between the link pins 20 of the link hitch 2 and the link bracket 18
The link pins 19 are formed in parallel with each other with substantially the same distance.

The weeder 8 is provided at the center of the left and right of the link hitch 2 so as to be freely rotatable around a low link shaft 11 in the front-rear direction. At the center of the link hitch 2, a cylinder mast protruding upward is provided. 21 is provided, and the cylinder mast 21 and the left and right lower parallel links 1
A lift cylinder 3 which is expanded and contracted by hydraulic pressure is provided between the center part of the link connection member 22 which connects the parallel links 1 to each other by the expansion and contraction of the lift cylinder 3.
A parallel link mechanism 4 is constructed which can be vertically rotated about 9 to raise and lower the link hitch 2 by a certain height.

The work hitch 10 can be attached with the tool bar 9 in the lateral direction, and the weeders 8 can be arranged at appropriate intervals along the lower side. Each weeder 8 has an arm 24 that is integral with a boss 23 that fits into the tool bar 9. The lower end of this arm 24 is provided with a weeding rotor 7 and a chain case 26 that is vertically swingable. At the front end of the chain case 26, the ground wheel 6 of the shaft mount 27 is rotatably grounded on the soil surface and rotated to rotate the chain case 26.
The weeding rotor 7 is driven and rotated through an internal chain mechanism to perform weeding action. Each of these chain cases 26
The spring 2 is provided between the arm 28 and the arm 28 protruding to the front side of the boss 23.
9 is provided so that the grounding wheel 6 can be frictionally driven by applying downward pressure to the ground. Further, the elastic position of the spring 29 can be adjusted up and down, and the height of the ground wheel 6 with respect to the weeding rotor 7 may be changed.

As described above, when the weeding machine 8 is mounted and the plowing or weeding work is performed, the parallel link mechanism 4 is lowered by operating the control valve of the hydraulic circuit connected to the lift cylinder 3, and the grounding wheel. 6 and the weeding rotor 7 are located between the crop A rows, and the forward movement of the vehicle body 5 causes the grounding wheel 6 to rotate due to friction with the soil surface. B is cultivated and weeded. The front and rear wheels 13, 15 of the tractor travel on the plough surface C of the soil or the groove portion between the ridges.

When the work in the forward stroke in the field is finished and the work is folded back at the ridge end, the parallel link mechanism 4 is operated to move upward so that the grounding wheel 6 and the weeding rotor 7 are located above the crop A. Then, the steering wheel 12 is operated to turn and steer the steering wheel 12 so that it is positioned between the adjacent crop A rows. Although the soil surface during work changes to unevenness, hardness, etc., the tool bar 9 can swing up and down around the central rolling shaft 11, and each grounding wheel 6 can swing up and down against the spring 29. Therefore, the grounding rotation of the grounding wheel 6 can be performed uniformly, and each weeding rotor 7 can be driven to perform accurate weeding.

Since the weeder 8 is grounded when the parallel link mechanism 4 descends, the weeder 8 is moved up and down in a substantially parallel state even if the soil surface changes up and down, and changes in the working posture are reduced. Stable cultivation and weeding can be performed. Moreover, since the lift cylinder 3 itself, which performs this lifting operation, is also lifted up and down when it descends, not only is the parallel link mechanism 4 easily attached and detached, but also the operation is smooth and the configuration is simple. It is also possible to adopt a configuration in which the vehicle body 5 or the front wheels 13 or the like does not largely project forward.

In addition, each weeder 8 adjusts the interval by moving the boss 23 laterally along the tool bar 9 as a building block or unit according to the number of rows of the crop A, the interval, and the like. Or it can be attached and detached. In FIG.
The difference from the above example is that a tail sled 31 that slides on the trail C of the rear wheel 15 of the tractor to the ground is provided on the rear side of the weeder 8 which is mounted on the rear part of the tractor body through a connecting arm 30 which can be lifted and lowered freely. And a pottery 33 arranged along the toolbar 32 at predetermined intervals. The soil between the crops A on the soil surface B is cultivated by the soil cultivator 33 while weeding the medium by the drive of the weeding rotor 6. The cultivator 33 is integrated with the tool bar 32, the weeding rotor 6, etc.
The tail sled 31 supports the trail C of the rear wheel 15 while sliding on the ground while rolling with respect to the boom 30. Therefore, stable work can be performed, and the tail sled 31 and the pottery 33 are vertically related. It is possible to shorten the front-rear distance from the rear end of the vehicle body by arranging the vehicle.

4 and 5, the difference from the above example is that
A pair of left and right cultivation plates 34 of the cultivation device 33 on the tail sled 31.
Is provided so as to be rotatable about a vertical shaft 36 with respect to a bracket 35 integrated with the tail sled 31, and the opening angle α of the soil plate 34 can be adjusted by the fixed position of the arm 37. Reference numeral 38 is an adjustment pin that determines the adjustment position of each arm 37 with respect to the bracket 35. The angles of the cultivating plate 34 may be adjusted to different angular positions or symmetrical positions.

A hitch 39 is mounted on a connecting frame on the rear side of the vehicle body and is moved up and down. Reference numeral 40 denotes an input shaft that is interlocked with a power extraction shaft on the vehicle body side, and drives a weeding rotor 6 axially mounted on a lower end portion of the transmission case 41 via a transmission case 41, a chain case 42, and other transmission mechanisms. Reference numeral 43 is a rotor cover, 44 is a stand for independently supporting the weeder 8, and 45 is an adjusting rod for adjusting the vertical position of the soil cultivator 33 with respect to the weeder 8. The burial device 33 includes the upper and lower link frames 46, 4
It is connected to the rear side of the frame of the weeder 8 by 7 and can be vertically adjusted by adjusting the length of the adjusting rod 45. Four
Reference numeral 8 is an adjusting rod for adjusting the distance between the upper and lower link frames 46 and 47. 49 is a loose spring.

[Brief description of drawings]

FIG. 1 is a side view.

FIG. 2 is a front view thereof.

FIG. 3 is a side view showing a part of another embodiment and a front view thereof.

FIG. 4 is a side view showing another embodiment.

FIG. 5 is a plan view of a part thereof.

[Explanation of symbols]

 1 parallel link 2 link hitch 3 lift cylinder 4 parallel link mechanism 5 vehicle body 6 grounding wheel 7 weeding rotor 8 weeding machine 9 toolbar 10 work hitch 11 rolling axis

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gen Odagiri, No. 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Pref.Iseki Agricultural Machinery Co., Ltd. Technical department

Claims (1)

[Claims] 1. A vehicle body 5 comprising a pair of left and right parallel link mechanisms 4 which are lifted and lowered by a lift cylinder 3 provided between a front end portion of a parallel link 1 and a link hitch 2 connected to the front end thereof.
On both sides of the front part of the vehicle, a tool bar 9 for arranging a weeder 8 which can be weeded in conjunction with a rear weeding rotor 7 by driving a front grounding wheel 6 is mounted on the left and right sides of the link hitch 2. A tractor weeder in which a work hitch 10 is swingably provided around a rolling shaft 11.