JP4057433B2 - Leveling device in a tiller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a leveling device for tilled topsoil in a walking-type small tractor that performs plowing and crushing work by a rotary method.
[0002]
[Prior art]
Finishing the topsoil that has been plowed and crushed is an important factor for improving efficiency and accuracy of planting work to be performed later. A small walking tractor (hereinafter referred to as a cultivator) that performs plowing and smashing work using a rotary system. In particular, the groove formed by the tilling depth adjusting device is one of the factors that can prevent this.
[0003]
Conventionally, as a technique for solving these problems, 1) In a side view, a flat body portion is provided on a rear cover that is attached to a rear portion of a rotary cover that covers the upper surface of the rotary portion so as to be swingable up and down by a hinge arranged in parallel with the rotary portion; The rotary cover is rotated back and forth based on the vicinity of the center of the rotary portion in accordance with the tilling depth (see, for example, Patent Document 1).
2) In a side view, a flat body is provided on the rear cover attached to the rear part of the fixed rotary cover that covers the upper surface of the rotary part so as to be swingable up and down by a hinge arranged in parallel with the rotary part (see, for example, Patent Document 2).
3) In plan view, a flat body is provided at the lower part of the rear surface of the U-shaped rear cover attached to the front left and right side surfaces of the rotary cover covering the upper part of the rotary part so as to be swingable up and down by fulcrums arranged in parallel with the rotary part ( For example, see Patent Document 3).
Etc. are known techniques.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 7-6725 [Patent Document 2]
JP-A-6-70603 [Patent Document 3]
Japanese Patent Laid-Open No. 8-191601
[Problems to be solved by the invention]
In the above known technique 1), weaving a structure for rotating and supporting the rotary cover has problems such as complication and weight increase in a tiller that requires light weight and simplicity. Since the flat body is provided at the rear end of the rear cover that extends rearward from the rear part of the cover, the overall length of the fuselage becomes longer, and there is a problem that the flat body does not move away from the ground surface unless the handle is lifted high when turning. In addition, in the known technique 3), since the flat body is provided at the rear end of the U-shaped rear cover extending rearward from the front side portion of the rotary cover, the weight is large and has sufficient strength in the left-right direction. There is a problem that becomes a heavy rear cover.
[0006]
Moreover, in any of the above cases, the flat body to be grounded always swings in parallel with the rotary part, so in a tiller with a narrow distance between the left and right wheels, the body tilts greatly to the left and right during tilling and crushing work. Since the flat body also tilts greatly to the left and right in conjunction with this, there is a problem that the left and right flatness of the plowing soil with respect to the traveling direction cannot be maintained.
[0007]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, technical means for solving this problem will be described.
That is, according to the first aspect, the tilling depth adjusting body having the processing claw fixed to the lower end can be slid up and down on the adjusting body support connected to the small walking tractor such as a tiller / management machine having a rotary portion. It is inserted into a fixed position with a push bolt, and is provided with a flat body mounting tool that is slidable up and down and fixed in place with a push bolt. On the rear surface of the tool, while fixing the mounting shaft whose axis is directed in the direction of travel, a fulcrum metal fitting that is rotatably fitted to the mounting shaft at the center in the left-right direction of the leveling body in the leveling device; A leveling device is provided which is provided with a pair of stoppers that regulate the left-right rotation angle within a predetermined range so that the leveling body can freely swing left and right within the predetermined range with respect to the rotary portion .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings.
1 is an overall side view of a tiller incorporating the present invention, FIG. 2 is an overall plan view, FIG. 3 is an essential side view, FIG. 4 is an A arrow view, and FIG. 5 is an overall side view of another embodiment. FIG. 6 is a view taken in the direction of arrow B.
[0009]
First, the entire structure of a tiller incorporating the present invention will be described with reference to FIGS. 1, 2, 3, and 4.
The entire tiller is composed of a traveling vehicle body 2, a tilling device 4, a tilling depth adjusting device 5, and a leveling device 6, and the traveling vehicle body 2 has an axle 17 </ b> L projecting left and right provided at the lower part of the transmission case 12. 17R is engaged in the rotational direction and positioned with the pins 17b and 17b in the left and right direction, and the wheels 18L and 18R are mounted and arranged at the center of the machine body. The front part is linked to the transmission case 12 via a transmission device. The front frame 11 with the engine 10 to be connected mounted on the upper surface is in the forward extension state, and the upper part is in the rear extension state with the control unit 20 composed of a handle base 21 and a handle 22 that can be rotated horizontally. In the vicinity, work vehicle attachment bodies 14 to which the tilling device 4 is attached are fixedly arranged to constitute the traveling vehicle body 2.
[0010]
In addition, when the pilot walks on the side of the aircraft so as not to make a footprint on the plowing topsoil, he / she will handle the steering wheel 22 while operating the steering wheel. If 21 is pivotally fixed at a predetermined angle, both the handles 22 can be held and operated.
[0011]
The tilling device 4 has a mounting seat 41c that engages with the work implement mounting body 14 at the front part, a transmission device having a speed change function is built in the upper part, and a rotary part 47 that is interlocked and connected to the lower part extends to the left and right. The tilling cover 49 having the adjusting body support 51 fixed to the tilling frames 49bL and 49bR is fastened and fixed to the tilling case 41 that is supported, and the side covers 48L and 48R are supported on both sides of the tilling cover 49 with the front portions as fulcrums. It is configured to be mounted so as to be pivotally adjustable.
The power transmission to the tilling case 41 has a structure in which the input shaft 13 penetrating the mission case 12 and projecting to the right side and the tilling input shaft 42 are interlocked and connected by the side case 46, and the G line is the tilling work. Indicates the surface of the hour.
[0012]
The plowing depth adjusting device 5 slides up and down on a plowing depth adjusting body 52a having an adjustment grip 52c detachably fixed to the upper end and a processing claw 52b fixed to the lower end, and an adjusting body support 51 having a push bolt 51c screwed to the side surface. Force that can be inserted and fixed in place with push bolts 51c, set tilling depth, handle residual tillage under the tilling case 41, and push forward the machine generated by down-cut rotary It has a function to absorb water.
[0013]
The leveling device 6 incorporating the present invention has a push bolt 61c screwed to the side surface, and slides a leveling body fixture 61 for fixing a mounting shaft 62 protruding rearward on the rear surface to the tilling depth adjusting body 52a. The fulcrum fitting 66 that engages with the mounting shaft 62 and a pair of stoppers 67L and 67R that restrict the rotation angle to a predetermined range are placed at a predetermined position. This is a structure in which a flat body 65 having a predetermined ground contact angle is mounted on a mounting shaft 62 so as to be rotatable.
[0014]
Another embodiment incorporating the present invention will be described with reference to FIGS.
Instead of the wheels 18L and 18R of the traveling vehicle body 2 described above, axle rotarys 37L and 37R having tilling claws arranged on the outer periphery of the drum are mounted on the axles 17L and 17R. An adjustment having a seat for engaging and fixing with this, a rectangular hole into which a tilling depth adjusting body 52a is slidably inserted in a vertical direction at a rear end portion extending rearward, and a push bolt 31c screwed into a side surface. An axle plowing vehicle body 3 is configured by mounting a body support 31.
[0015]
The plowing depth adjusting body 52a of the plowing depth adjusting device 5 in which the leveling device 6 is inserted into the axle plowing vehicle body 3 is inserted into the rear part of the adjusting body support 31, and fixed at a predetermined position by the push bolt 31c. By fixing the leveling device 6 to a position in accordance with the tilling depth with a push bolt 61c, an axle tilling type tiller equipped with the leveling device 6 incorporating the present invention is constructed.
The grounding portion of the leveling body 65 is configured by fixing the grounding body 65b to the leveling flat plate 65a in a comb shape, and the grounding body 65b is inserted deeply into the plowing topsoil so that the topsoil is leveled. A flat body 65 is shown as an example.
[0016]
In this plowing and crushing work, the plowing depth is determined by adjusting the ground pressure to the axle rotary portion 30 with the force of pushing down the handle 22 with the lower end of the plowing depth adjusting device 5 as a fulcrum, and the processing claw 52b is below the transmission case 12 This is performed by treating the residual tillage generated in the above and absorbing the force that pulls the machine body generated by the axle rotary part 30 forward.
[0017]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained. That is, the tilling depth adjusting body having the processing claw fixed to the lower end is inserted into the adjusting body support connected to the walking-type small tractor such as a tiller / management machine having a rotary portion so as to be slidable up and down. The leveling fixture is inserted into the tillage adjusting body so as to be vertically slidable and fixed at a predetermined position by a push bolt, and a shaft is mounted on the rear surface of the leveling fixture. While fixing the mounting shaft whose core is directed in the traveling direction, a fulcrum metal fitting that is rotatably fitted to the mounting shaft at the center in the horizontal direction of the leveling body in the leveling device, and the horizontal rotation angle thereof. A pair of stoppers that are restricted to a predetermined range are provided so that the flat body can freely swing left and right within the predetermined range with respect to the rotary part . The left / right tilt, that is, the left / right tilt of the rotary part Evenly, the entire width of the flat body is maintained uniformly with the plowing topsoil, and while pressing an appropriate amount of soil forward, the recesses such as grooves are leveled and leveled, and also adaptable to the tilling depth The effect of absorbing the jumping out of the aircraft caused by the down cut type rotary can be obtained.
[0018]
In addition, by attaching the flat body to the tilling depth adjusting body that can move only in the vertical direction , it becomes a simple, small and lightweight flat body. The ground contact part of the body is maintained at a predetermined tilling depth by the force received from the topsoil, and also prevents resistance of the aircraft from popping out. The effect of leaving is obtained.
[0019]
By incorporating these effects, even with a small and lightweight tiller, plowing and crushing work can be performed to obtain a horizontal and level topsoil without grooves, improving efficiency and accuracy of planting work to be performed later. In addition, in a tiller having a rotary part with a full-plowing structure, it is possible to provide a tiller in which the flat body itself of the present invention itself can also serve as a tilling depth adjusting body and no grooves are formed. It becomes possible.
[Brief description of the drawings]
FIG. 1 is an overall side view of a tiller incorporating the present invention.
FIG. 2 is an overall plan view of the same.
FIG. 3 is a side view of the main part of the same.
4 is a view as seen from the direction of arrow A. FIG.
FIG. 5 is an overall side view of another embodiment.
FIG. 6 is a view of the main part B as seen from the same direction.
[Explanation of symbols]
2 Traveling vehicle body 3 Axle plowing vehicle body 4 Tillage device 5 Plowing depth adjustment device 6 Leveling device 20 Steering unit 22 Steering wheel left and right 30 Axle rotary portion 37 Axle rotary 47 Rotary portion 49 Plowing cover 52 Plowing depth adjustment body A → A arrow B → B arrow view G Ground line arc arrow during operation Rotation direction

Claims (1)

The tilling depth adjusting member 52a which is fixed the process pawl 52b at the lower end, the rotary unit 47, (30) the adjusting member support 51 which is provided continuously to the walking type compact tractors such as tillers, tiller having a (31) It is inserted so as to be slidable up and down and fixed at a predetermined position by a push bolt 51c ( 31c ) , and is attached to the plowing depth adjusting body 52a so as to be slidable up and down and fixed at a predetermined position by a push bolt 61c. A tool 61 is provided, and a mounting shaft 62 whose axis is oriented in the direction of travel is fixed to the rear surface of the flat body mounting tool 61, while the flat body 65 of the leveling device 6 has a central portion in the left-right direction. A fulcrum metal fitting 66 that is rotatably fitted to the mounting shaft 62 and a pair of stoppers 67L and 67R that restrict the left and right rotation angles within a predetermined range are provided, and the flat body 65 is the rotary portion 47, ( 30 ) to within a predetermined range Hitoshitaira device, characterized in that configured so as to freely swing to the right.

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