JPH09103103A - Rotary plowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary plowing device capable of prohibiting the dashing phenomenon and plowing well to form uniform clods over the whole plowing width by setting a transmitting speed reduction ratio of a main transmission mechanism driving a main plowing claw shaft cylinder smaller than that of a reverse driving mechanism driving a sub plow claw shaft cylinder. SOLUTION: This rotary plowing device is provided by installing with spanning a plowing shaft 3 driven by a main transmission mechanism 2 located in a central transmission case 1, and protruded to left and right at the lower position of the central transmission case 1, directly installing each of main plowing claw shaft cylinders 4 to parts close to the protruded ends at the left and right of the central plowing shaft 3, also installing with supporting each of sub plowing claw shaft cylinders 5 different from the main plowing claw shaft cylinder 4, as freely rotatable at both of the left and right side parts close to the central transmission case 1, driving with reverse rotating each of the sub plowing claw shaft cylinders 5 with a reverse rotation driving mechanism 8 moving as interlocked with the main transmission mechanism 2, and setting a transmitting speed reduction ratio of the main transmission mechanism 2 and the transmission speed reduction ratio of the reverse rotation driving speed reduction mechanism 8 as the reverse rotation driving mechanism 8 < the main transmission mechanism 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tilling device including a main tillage pawl shaft barrel that rotates downcut and a subtilt pawl shaft barrel that rotates upcut.

[0002]

2. Description of the Related Art Conventionally, a main cultivating pawl shaft cylinder is directly mounted on a drive shaft protruding left and right from a central transmitting case, and a sub-cultivating pawl shaft cylinder different from the main cultivating pawl shaft cylinder is centrally transmitted. The cultivating pawls are rotatably supported on both left and right sides of the sprocket, and the sub-cultivating claw shaft cylinders are up-cut and rotated with respect to the main cultivating claw shaft cylinders that rotate downcut, and are fixed to both claw shaft cylinders. There is known a rotary cultivating device which suppresses the airframe dash phenomenon by canceling each other by anti-rotation (see Japanese Patent Publication No. 46-39041).

[0003]

According to the above-mentioned conventional device, the main dash phenomenon caused by the driving load of the plowing claw of the main plowing claw barrel that rotates in the downcut is caused by the dash phenomenon of the vehicle body, and the auxiliary plowing claw barrel that rotates in the upcut rotation. Although it is pressed down by the deterrent force of the cultivating claw of the gutter, the main cultivating claw cylinder has a large lump of soil because the cultivating claw of the claw grows down cutting the soil. The tilling claw cuts the soil in an up-cut, which causes a problem that the clod becomes smaller and the size of the clod becomes uneven over the entire plowing width.In particular, in the paddy field, the sub-tilting claw barrel is not the same as the plowing claw. Various problems were to occur such that the cultivated part became streaky and the soil mass became too fine, resulting in poor drainage and uneven crop growth.

[0004]

SUMMARY OF THE INVENTION According to the present invention, the transmission reduction ratio of a reverse rotation drive mechanism for driving a sub-cultivating claw shaft cylinder that rotates in an upcut rotation is set to a transmission reduction ratio of a main transmission mechanism that drives a main tilling pawl shaft cylinder in a downcut rotation. It is set to be smaller than the transmission reduction ratio. In this way, by rotating the sub-cultivating claw shaft cylinder that rotates up-cut at a lower speed than the main tilling claw shaft that rotates down-cut, while fully fulfilling the function of suppressing the dash phenomenon of the airframe, the entire cultivating width can be adjusted. You will be able to cultivate in good condition.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the rotary cultivating apparatus of the present invention,
The cultivating shaft driven by the main transmission mechanism in the central transmission case is laterally provided at the lower part of the central transmission case so as to project to the left and right, and the main cultivating claws are provided at the left and right protruding end portions of the cultivating shaft. The shaft cylinders are directly mounted, and the left and right side portions adjacent to the central transmission case respectively rotatably support the sub-cultivating claw shaft cylinders that are separate from the main tilling claw shaft cylinders. Claw shaft tube,
It is configured to be driven in reverse by a reverse rotation drive mechanism linked to the main transmission mechanism, and the transmission reduction ratio of the main transmission mechanism for driving the main tillage pawl barrel and the transmission of the reverse rotation drive mechanism for driving the sub tillage pawl barrel. Set the reduction ratio to reverse rotation drive mechanism <main transmission mechanism.

[0006]

Embodiments will be described with reference to the drawings.
In FIG. 3, a cultivator (T) uses the power of an engine (9) mounted on a frame extending forward from the mission case,
Wheels (1) that are transmitted to the axle supported by the lower part of the mission case via a transmission device in the mission case and are fitted to the axle
0) is driven to rotate and the driving operation is performed by the steering handlebar (11) which is postponed from the mission case.
Is configured to be performed at the handle portion of the. And
A rotary cultivator (R) can be detachably attached to the rear part of the mission case.

[0007] The rotary plow (R) is a mission cage.
Transmission gear attached to the power take-out part of the
And a tillage setting tail wheel device (12) installed at the tail of a beam extending backward from the upper portion thereof, and a tillage cover (13). At the lower end of the housing (1), a tilling shaft (3) orthogonal to the traveling direction is horizontally supported, and the cultivating shaft (3) is housed in the transmission case body (1). The transmission mechanism (2) drives in a predetermined rotation direction.

The main transmission mechanism (2) comprises a drive sprocket (14) mounted on the upper part of the central transmission case (1) and a passive sprocket (15) wedged to the center of the tiller shaft (3). ) And a chain (6), and in the embodiment, it rotates in the counterclockwise direction (A).

Further, the tiller shaft (3) is projected from the central transmission case (1) to the left and right, and the main tiller claw shaft cylinder is provided at a portion near the protruding end.
(4) (4) is directly mounted so that they are driven to rotate in the same direction as the tiller shaft (3), and each main tiller claw shaft cylinder
Tillage claws (16) are fixed to the outer periphery of (4) in a predetermined arrangement,
These tillage claws are driven into the soil by down-cut rotation (D).

On the other hand, bearing holders (17) (17) having inclined outer diameter portions which are inclined at a constant angle with respect to the axis of the cultivating shaft (3) are provided on both left and right sides of the central transmission case (1). 17) is provided,
The sub-cultivating claw shaft cylinders (5) and (5) are rotatably mounted on bearings at the respective inclined outer diameter portions, and the sub-cultivating claw shaft cylinders (5) are configured to be interlocked with the main transmission mechanism (2). With the reverse rotation drive mechanism (8), the direction opposite to that of the main tillage claw shaft cylinder (4), that is, the clockwise direction
It is designed to be rotationally driven to (B).

Then, the sub-tiling claw shaft cylinders (5), (5) which rotate around an axis inclined at a constant angle with respect to the axis of the tilling shaft (3).
The plowing pawls (18) are fixed to the outer peripheral portion of the platter in a predetermined arrangement, and the plowing pawls are turned up-cut (U) to the central transmission case.
(1) It is constructed so that it can be driven diagonally into the soil directly below.

The reverse drive mechanism (8) is constructed as follows in the embodiment shown in FIGS. Tillage axis
A rotary shaft (19) parallel to (3) is provided on the central transmission case (1) in the vicinity of the cultivating shaft (3) so as to have a bearing horizontally.
A sprocket (7) is wedged to the central part of (19), the sprocket (7) is meshed with the loose side of the chain (6) inside the winding of the chain (6), and the cultivating shaft ( It is adapted to rotate in the same direction (A) as the passive sprocket (15) wedged in (3).

Gears (20) and (20) are wedged to the rotary shaft (19) at the left and right sides of the sprocket (7), and the gears (20) and (20) are respectively attached to the cultivating shaft (3). To the driven gears (21) (21), which are rotatably fitted to the outer circumference of the bearing holder (17) and rotatably fitted to and supported by the inner diameter portion of the bearing holder (17), and are further engaged with the driven gears (21) ( The gear (22) (22) provided on the outer end of the boss portion of (21) is attached to the receiving gear portion (23) (23) formed in the inner diameter portion of the sub-plow shaft pawl tube (5) (5). They are engaged with each other to form a refraction transmission section.

The passive sprocket (15) for driving the tiller shaft (3) has 17 teeth, while the reverse drive mechanism is used.
The sprocket (7) that constitutes (8) has 14 teeth and a gear (2).
0) has 25 teeth and the driven gear 21 has 31 teeth. That is, the transmission reduction ratio of the reverse rotation drive mechanism (8) and the transmission reduction ratio of the main transmission mechanism (2) are set such that the reverse rotation drive mechanism (8) <the main transmission mechanism (2). In addition, (24) is the tip turning locus of the tilling claw fixed to the main tilling claw shaft cylinder, (25) is the tip turning locus of the tilling claw fixed to the sub tilling claw shaft, and (26) is the chain. It is a tension mechanism.

FIG. 4 shows a second embodiment of the present invention.
This embodiment is different from the first embodiment shown in FIGS. 1 to 3 in the specific structures of the sub-plowing claw shaft cylinder (5) and the reverse drive mechanism (8), but other parts are the same as the first embodiment. Since the same reference numerals are used for the portions common to the first embodiment, only the portions different from the first embodiment will be described.

In this example, the sub-cultivating shaft claw tube (5) is not tilted with respect to the cultivating shaft (3), but is installed in a state in which the rotational axes of both are aligned. The sub-plow shaft nail tube (5) and a portion corresponding to the supporting portion thereof are provided as a case for accommodating the reverse rotation drive mechanism (8).

That is, a large-diameter base body (27) for inserting and supporting the cultivating shaft (3) in the center hole is fixed to the left and right side surfaces of the central transmission case (1), and the outside of the base body (27). A large-diameter outer body, which is a sub-plowing shaft claw cylinder (5), is rotatably supported by the cultivating shaft (3) so as to be supported by the base body (27) and the sub-cultivating shaft claw cylinder (5).
And form a case.

Then, the cultivating shaft (3) is provided inside the case.
The reverse drive gear (28) is fitted and fixed to the reverse drive gear.
(28) is an idle gear axially attached to the base (27)
It is always meshed with (29) and idle gear (29)
The intermediate gear (30) is constantly meshed with the
0) is always meshed with the final gear (31) which is idled and supported by the tilling shaft (3), and the sub-tilting shaft pawl tube (5) moves from the final gear (31).
The reverse rotation drive mechanism (8) is configured so as to be transmitted to the passive gear portion (32) formed at the inner end of the boss portion.

In the second embodiment, the passive sprocket (15) fitted on the tilling shaft (3) has 14 teeth,
The reverse rotation drive gear (28) of the reverse rotation drive mechanism (8) has 25 teeth, the idle gear (29) has 14 teeth, the intermediate gear (30) has 14 teeth, and the final gear (31) has 20 teeth. The rotation of the tiller shaft (3) driven directly by the passive sprocket (15) causes the rotation of the sub tiller claw shaft cylinder (5) driven by the power transmitted through the reverse rotation drive mechanism (8). It's getting slow.

Therefore, also in the second embodiment, the tilling claws of the main tilling claw shaft cylinder (4) directly mounted on the tilling shaft rotate up-cut at a predetermined number of rotations, while the sub tilling claw shaft cylinder (5). The cultivating claws fixed to) are reversely driven at a slower speed than the rotation speed of the cultivating claws of the main cultivating claw shaft cylinder. Further, since the sub-tiling claw shaft cylinder (5) rotates coaxially with the tilling shaft (3), the residual tillage treatment function immediately below the central transmission case (1) is better than that of the first embodiment. Although there are some difficulties, since the diameter of the sub-plowing claw shaft cylinder (5) is larger than that of the first embodiment, wrapping of grass straw is reduced and good operation can be expected. Cylinder
The support structure of (5) is also simplified, and the structure of the entire device is simple and inexpensive.

[0021]

The main transmission mechanism (2) in the central transmission case (1)
Is operated, its power is transmitted to the tiller shaft (3) to drive the tiller shaft (3) and the main tiller pawl shaft cylinder (4) directly mounted to the tiller shaft (4) in the downcut rotation direction, and at the same time, the main transmission mechanism.
The subtilt claw shaft cylinder (5) is driven in the upcut rotation direction by the reverse rotation power transmitted via the reverse rotation drive mechanism (8) interlocking with (2). Then, the main tillage claw shaft cylinder (4) that rotates down-cut rotates, and the sub-cultivating claw shaft cylinder (5) that rotates up-cut rotates, while the sub-cultivation claw is performed. Reverse rotation drive mechanism (8) for driving the claw shaft tube (5)
Transmission reduction ratio and main transmission mechanism for driving the main tillage shaft cylinder (4)
Since the transmission reduction ratio of (2) is set to the former <the latter, the theoretical pitch of the sub-plowing claw shaft (5) is the same as that of the main plowing claw shaft (4). On the contrary,
In the working state, the mass of the sub-tiling claw shaft (5) cultivated by the cultivating claw is higher than that of the part of the main cultivating claw shaft (4) cultivated by the cultivating claw. It will not be too fine and will be cultivated in a uniform condition with the size of the soil mass being uniform over the entire plowing width.

Therefore, according to the apparatus of the present invention, it is possible to perform good tillage without causing streak-like drainage failure points where the soil clod becomes too fine, while sufficiently fulfilling the function of suppressing the dash phenomenon of the body even when cultivating paddy fields. You can

[Brief description of the drawings]

FIG. 1 is a development view of a transmission cross section showing a main structure of a device of the present invention.

FIG. 2 is a schematic side view of the 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 transmission sectional development view showing another embodiment of the device of the present invention.

[Explanation of symbols]

 1 Central transmission case 2 Main transmission mechanism 3 Tillage shaft 4 Main tillage claw shaft cylinder 5 Sub tillage claw shaft cylinder 8 Reverse rotation drive mechanism

Claims (1)

[Claims] 1. A main transmission mechanism (2) in a central transmission case (1).
The tilling shaft (3) driven by the central transmission case (1)
It is located in the lower part of the ridge and is laid horizontally so as to project to the left and right, and the cultivating shaft (3)
The main tillage pawl shaft cylinders (4) and (4) are directly mounted on the left and right protruding end portions of the above, and the main tillage pawl shaft cylinders (4) and (4) are attached to the left and right side portions near the central transmission case (1). Is a reverse rotation drive mechanism that rotatably supports separate sub-cultivating claw shaft cylinders (5) and (5), and links each sub-cultivating claw shaft cylinder (5) with the main transmission mechanism (2).
(8) In the rotary cultivator configured to be driven in the reverse direction, the transmission reduction ratio of the main transmission mechanism (2) for driving the main tillage claw shaft cylinders (4) and (4), and the sub tillage claw shaft cylinder. (5) The transmission reduction ratio of the reverse rotation drive mechanism (8) that drives (5)
(8) <Rotary tiller which is set to the main transmission mechanism (2).