JP2001095303A - Rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the depth of tillage by a rotary tiller to be goodly set by a tillage depth-setting device. SOLUTION: This rotary tiller has a tine shaft rotary having both of a normally rotating tine shaft cylinder having a normally rotating tillage tine, and a reversely rotating tine shaft cylinder having a reversely rotating tillage tine, and horizontally supported at the lower part of a tillage-part machine frame, and a tillage depth-setting device installed in the rear end part of the tillage-part machine frame. The reversely rotating cylinder rotates around an axis center tilted so as to be lowered in the outer direction, and the tillage depth-setting device 12 is arranged within the range of tilling width tilled by the aslant and reversely rotating tillage tine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tiller connected to a traveling vehicle such as a tiller.

[0002]

2. Description of the Related Art A rotary tillage device connected to a traveling vehicle such as a tiller is provided with a tillage action depth of a tillage claw mounted on a claw shaft rotary, behind a claw shaft rotary. Although it is configured to be adjusted and set by a tilling depth setting device such as a tail wheel, a general type of this type is that all the tilling claws on the claw shaft rotary have the same forward rotation direction as the traveling direction of the traveling vehicle body. (Down cut direction).

[0003]

Therefore, in the prior art, the tilling depth is transferred by the tilling depth setting device to the soft cultivated soil tilled by the forward rotation tilling claw rotating downcut, so that the tilling depth is reduced. Tillage tends to become unstable, and the tilled soil that is flipped backward by the forward tilling claws directly jumps and adheres to the tilling depth setting device, and the tilling depth setting function is not properly performed. There is a problem that the tillage mark is trampled by the tillage depth setting device to which tread adheres, and the tiling finish accuracy is deteriorated.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and in order to achieve the object, a forward-rotating claw shaft cylinder (4) having a forward-rotating tilling claw (16) is provided. ) (4) and a reversing claw shaft cylinder (5) (5) having a reversing tilling claw (18) are arranged side by side in the axial direction. Tillage setting device at the rear end of the tilling machine frame
In the rotary tilling apparatus provided with (12), the reversing claw shaft cylinder (5), (5) is an inclined rotating cylinder that rotates around an axis that is inclined low outward, and the reversing claw shaft cylinder that rotates and tilts. (5) Tillage depth setting device in the tillage range where the reverse tilling claw (18) of (5) plows
(12) is used as a rotary tillage device.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded cross-sectional view showing the essential structure of the device of the present invention, and FIG. FIG. 3 is a schematic side view of the entire cultivator in which the device of the present invention is implemented.

In FIG. 3, a cultivator (T) which is a traveling vehicle
Transmits the power of the engine (9) mounted on the frame extending forward from the transmission case to the axle supported at the lower part of the transmission case via a transmission in the transmission case, The vehicle is driven by rotating a wheel (10) fitted to the axle, and the driving operation is performed by a handle portion of a steering handle (11) extending from the transmission case. A rotary tilling device (R) can be detachably provided at the rear of the mission case.

[0007] The machine frame (cultivation unit machine frame) of the rotary tillage device (R) is composed of a central transmission case (1) which is mounted in conjunction with the power take-out part of the transmission case, and an upper part thereof. And a tilling cover (13) and the like.
2) is provided, and at the lower end of the center transmission case (1) of the tilling unit frame, a tilling axis (3) orthogonal to the traveling direction is horizontally supported horizontally, and the tilling axis (3) is A chain transmission mechanism (2) accommodated in the transmission case body (1) is driven in a desired rotation direction.

The chain transmission mechanism (2) includes a central transmission case.
A driving sprocket (14) mounted on the upper part of (1) and a passive sprocket (1) wedged at the center of the tilling shaft (3).
5) and a chain (6), and in the illustrated example, it rotates in the normal rotation direction (counterclockwise A).

Further, the tilling shaft (3) projects left and right from the central transmission case (1), and a forward-rotating claw shaft cylinder is provided near the projecting end.
(4) (4) are mounted directly, and they are driven to rotate in the same direction as the tilling shaft (3).
The forward rotation tilling claws (16) are fixed in a predetermined arrangement on the outer periphery of the, and these forward rotation tilling claws are driven into the soil by a down cut rotation (D).

On the other hand, on both left and right side portions of the central transmission case (1), bearings having inclined outer diameter portions which are inclined downward at a fixed angle with respect to the axis of the tilling shaft (3) outward. Holder (17) (17)
Are provided, and a reversing claw shaft cylinder (5) is provided at each inclined outer diameter portion.
(5) is rotatably mounted on bearings, and each reversing claw shaft cylinder (5)
However, the reverse rotation drive mechanism (8), which is interlocked with the chain transmission mechanism (2), is driven to rotate in the direction opposite to the forward rotation nail shaft cylinder (4), that is, clockwise (B). Has become.

The outer circumference of the reversing claw shaft cylinders (5) (5) rotating around the axis inclined at a fixed angle to the outside at a fixed angle with respect to the axis of the cultivating shaft (3) is provided on the outer circumference of the reversing tilling claw (5). 18) are fixed in a predetermined arrangement, and the inverted tilling claws (18) are driven obliquely into the soil immediately below the central transmission case (1) by an up-cut rotation (U). .

That is, the reversing claw barrels (5) and (5) which are located on both left and right sides adjacent to the central transmission case (1) and rotate in the up-cut direction, and the respective reversing claw barrels (5) The claw shaft rotary is constituted by the forward rotation claw shaft cylinders (4) and (4), which are located substantially concentrically on the outer side in the axial direction of (5) and rotate in the downcut direction.

The reverse drive mechanism (8) is constructed as follows in the embodiment shown in FIGS. A rotating shaft (19) parallel to the cultivating shaft (3) is mounted on the central transmission case (1) in the vicinity of the cultivating shaft (3), and the rotating shaft is
A sprocket (7) is wedge-fitted to the central portion of (19), and the sprocket (7) is meshed with the slack side of the chain (6) inside the winding of the chain (6), and It rotates in the same direction (A) as the wedge-mounted passive sprocket (15).

Gears (20) and (20) are wedge-fitted to the rotating shaft (19) on both left and right sides of the sprocket (7), and the respective gears (20) and (20) are attached to the tilling shaft (19). ), And is always meshed with driven gears (21) (21) provided rotatably and externally fitted on the inner diameter of the bearing holder (17). The gears (22) and (22) provided at the outer end of the boss portion of (21) are connected to the reversing claw shaft cylinder (5).
The refraction transmission portion is formed by meshing with the receiving gear portions (23) (23) formed on the inner diameter portion of (5). Therefore, the power of the rotating shaft (19) rotating in the same direction as the cultivating shaft (3) is transmitted through the gear (20), the driven gear (21), and the refracting power transmission unit, and the power of the rotating rotative shaft in the opposite direction to the rotating direction of the tilling shaft. Is transmitted to the reversing claw shaft cylinder (5) (5).

In FIG. 1, (24) is the tip rotation locus of the forward rotation tilling nail fixed to the forward rotation nail shaft cylinder, and (25) is the tip rotation of the reverse rotation tilling nail fixed to the reverse rotation nail shaft cylinder. The trajectory is shown, and the above-described reverse rotation drive mechanism (8) is provided so as to be substantially contained within the range of the trajectory.

1 and 2 show a chain tensioning mechanism. The chain tensioning mechanism shown in FIG. 1 and FIG. 2 meshes with the slack side of the chain (6) from the outside near the portion where the chain is wound around the sprocket (7). Spindle with rotating idle sprocket (27)
(28) is fitted inside the support cylinder (29) so as to be able to advance and retreat, and its support shaft is
(28) has an automatic tension structure in which the idle sprocket (27) is urged by a spring (30) in the direction in which the idle sprocket (27) is pressed against the chain (6). The structure can be adopted, and the chain tensioning mechanism is not an automatic tensioning structure, but may be provided by an operation adjusting structure capable of adjusting the tension and relaxation as needed.

FIGS. 4 and 5 show a modified example. FIG. 4 is a developed view of a transmission section, and FIG. 5 is a schematic side view of the transmission structure. This modification is different from the one shown in FIGS. 1 to 3 in the specific structure of the reverse rotation drive mechanism (8), and the other parts are substantially the same as those in the embodiment in FIGS. The same reference numerals are used for the portions that are described, and only the portions that are different from the embodiment of FIGS. 1 to 3 will be described.

In this modification, a sprocket (7) wedge-fitted to the center of the rotating shaft (19) is meshed from the outside with the slack side of the chain (6), and also functions as a chain tensioning mechanism. The rotation is performed in the direction (B) opposite to the rotation direction (A) of the tilling shaft (3) while performing the adjustment. Further, at the left and right sides of the sprocket (7), other sprockets (31) and (31) are wedge-fitted to the rotating shaft (19), respectively. Driven gear (2
A portion corresponding to 1) is formed on the driven sprockets (32) and (32), and the left and right sprockets (31) (32) and (31)
A reverse rotation driving mechanism (8) is formed by hanging a reverse rotation chain (33) on each of (32).

[0019]

According to the rotary tilling device of the present invention, there are provided a forward-rotating claw barrel (4) (4) having a forward-rotating tilling claw (16) and a reverse-tiling tilling claw (1).
8) A claw shaft rotary constructed by juxtaposing the reversing claw shaft cylinders (5) and (5) in the axial direction is horizontally mounted on the lower part of the cultivation unit machine frame, and after the cultivation unit machine frame. In a rotary tillage device having a tillage depth setting device (12) provided at an end thereof, the reversing claw shaft cylinders (5) and (5) are formed as inclined rotating cylinders that rotate around a shaft center that inclines outward and low. Reversing tilling claws of reversing claw shaft cylinders (5), (5) that rotate inclining
The following effects are achieved by disposing the tillage depth setting device (12) in the tillage width region where (18) plows.

The ground where the tillage setting device (12) is shifted is tilled by a reverse tilling claw (18) that rotates inclining around an axis that is inclined low outward and the cultivated soil is temporarily set. It is flipped up in a direction away from (12), that is, in a forward and upward direction and diffuses right and left outward, moves along the tillage cover (13), and plows through the upper part of the tillage depth setting device (12). It is thrown into the passage of the depth setting device (12).
Therefore, the degree to which the cultivated soil jumps directly to the tillage depth setting device (12) and adheres and accumulates is reduced as much as possible. The occurrence of troubles such as stepping on is reduced. Further, the tilled soil is flipped up by the inclined rotating reverse tilling claw (18) so as to spread forward and upward and to the right and left outward, and moves along the tilling cover (13) to set the tillage depth setting device (12). Since the cultivation depth setting device (12) shifts the cultivated area thrown into the passage of the cultivation depth setting device (12) through the upper part of the cultivation depth setting device (12), the cultivation depth setting device (12) moves in contact with the hard ground than the cultivated soil. As a result, the stability of tillage depth is improved. And, in the tilling area by the reverse tilling claw (18), the tilling soil thrown into the passage mark of the tilling depth setting device (12) makes the same device.
The traces of (12) are erased, and the tillage setting device (1)
Since 2) does not step on the cultivated soil in the tilling area by the forward rotation tilling nail (16), the tilling finish of the entire tilling area of the claw shaft rotary is improved. Can be.

[Brief description of the drawings]

FIG. 1 is an exploded cross-sectional view showing a transmission structure of a device according to the present invention.

FIG. 2 is a schematic side view of a transmission structure of the device of the present invention.

FIG. 3 is an overall side view of a cultivator in which the device of the present invention is implemented.

FIG. 4 is a sectional development view showing a modified example of the transmission structure of the device of the present invention.

FIG. 5 is a schematic side view of the transmission structure of the modification shown in FIG. 4;

[Description of Signs] T Traveling Vehicle (Tilling Machine) 1 Central Transmission Case 4 Forward Claw Shaft 5 Reverse Claw Shaft 12 Tillage Depth Setting Device 13 Cultivation Cover 16 Forward Cultivating Claw 18 Reverse Cultivating Claw

Claims (1)

[Claims] [Claim 1] A forward-rotation claw barrel having a forward rotation tillage claw (16)
(4) Reversing claw barrel (5) including (4) and reversing tillage claw (18)
(5) is installed side by side in the axial direction with a claw shaft rotary, which is supported horizontally below the tilling machine frame, and a tillage depth setting device (12) is provided at the rear end of the cultivating machine frame. In the provided rotary tillage device,
The reversing claw barrels (5) and (5) are inclined rotating cylinders that rotate around a shaft center that is inclined outwardly low, and the reversing tilling claws (18) of the reversing claw barrels (5) and (5) that rotate and tilt are rotated. A rotary tilling device, characterized in that a tillage depth setting device (12) is disposed within a cultivation width region in which tilling is performed.