JP2957956B2 - Rotary tilling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a main tilling claw shaft cylinder fixed to a portion near a protruding end of a drive shaft protruding left and right from a central transmission case, and to the left and right side portions close to the central transmission case. Equipped with a sub-tilling claw shaft cylinder that is separate from the main cultivating claw shaft cylinder, and by driving the sub-tilling claw shaft cylinder in reverse with respect to the main cultivating claw shaft cylinder, the soil of the tilling claw that is fixed to the sub-tilling claw shaft cylinder The present invention relates to a rotary tilling device that performs medium driving in a direction opposite to that of a main cultivating claw shaft cylinder.

[0002]

2. Description of the Related Art There are two types of rotary tilling apparatus: a down-cut type in which a cultivating claw is rotated from the front to the rear in a body advancing direction, and an up-cut type in which a tilling claw is rotated in a body advancing direction from a back to a front. In the case of the downcut type, the driving load of the tilling claw acts in the direction that promotes the propulsion of the aircraft, so that the aircraft dash phenomenon is likely to occur. Since the nailing reaction force acts in the direction of inhibiting the propulsion of the fuselage, slipping of the wheels is likely to occur, and in any case, it tends to be difficult to perform appropriate tilling.

For this reason, for example, Japanese Patent Publication No. 46-3904
As can be seen in Japanese Patent Application Publication No. 1 (1994), a sub-tilling claw shaft cylinder separate from the main cultivating claw shaft tube fixed to a portion near the protruding end of the drive shaft projecting left and right from the central transmission case is attached to the left and right sides of the center transmission case. The sub-tilling claw shaft cylinder is rotatably mounted on both sides adjacent to each other, and its sub-tilling claw shaft cylinder is driven to rotate in the opposite direction to the main plowing claw shaft cylinder, and the tillage of the main and sub-tilling claw shaft cylinders is cultivated. There has been proposed a configuration in which a dash phenomenon of the body or a wheel slip phenomenon is suppressed by a canceling action by the rotation of the claws in the opposite direction. Also, in the prior art, there is a main tilling claw.
Turn the lower end of the central transmission case with the shaft cylinder
To the main tilling claw shaft cylinder
The sub-tilling claw shaft tube that rotates in the opposite direction
A transmission that accommodates the shaft cylinder and the main tilling claw shaft cylinder in the central transmission case
The mechanism that rotates each in the expected direction
(For example, see Japanese Patent Application Laid-Open No. 60-23002).
See).

[0004]

In this type of apparatus, the left and right main cultivation claw shaft cylinders are mounted directly on a cultivation shaft driven by a chain transmission mechanism in a central transmission case, and the same as the cultivation shaft. And the sub-tilling claw shaft
Towards the cylinder, which than is being configured to rotate in opposite directions relative to the main tilling claws shaft tube with secondary pawl axis drive mechanism and an input unit sprocket which meshes with chain of the chain transmission mechanism, the prior art In the former , the sprocket, which is the input part of the sub-claw shaft drive mechanism, is meshed with the tight side of the chain of the chain transmission mechanism to reduce the chain winding angle. When the chain pulsates due to the impact load of the tilling nails fixed to the tilling nail barrel driven into the soil, the transmission of driving force to the sprocket becomes unstable, and the rotation drive of the sub-tilling nail barrel is performed stably. There was no problem. In that regard, in the latter case,
Since the winding angle of the chain is relatively large,
The rotation drive stability of the sub-tilling claw shaft cylinder is better than the former
However, the lower part of the central transmission case is large and complicated.
Cultivated soil in the complicated shape portion that swells out of the rotation
It is not possible to achieve proper tilling due to adhesion of grass straw etc.
It is easy to swell, and the center of the main tilling claw cylinder in the axial direction
It is said that soil and other deposits are likely to accumulate in the
Another problem arises.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a main tillage.
Rotation of the sub-tilling claw shaft rotating in the opposite direction to the claw shaft
While ensuring stable driving, the central transmission cable
The case is simple and compact, and the transmission case and its
Of soil and grass straw on the surrounding area
There is no rotary tilling equipment to get . And then
In order to achieve the purpose, the chain in the central transmission case (1)
The tilling shaft (3) driven by the power transmission mechanism (2)
At the lower part of the central transmission case (1),
And lay it horizontally, and the area near the left and right protruding ends of the tilling axis (3)
The main tilling claw barrels (4) and (4) will be fixed respectively
At the left and right sides adjacent to the central transmission case (1)
A sub-tilling claw shaft cylinder (5) which is separate and concentric with the main cultivating claw shaft tube
(5) Each of the sub-tilling claw shafts is mounted to be freely rotatable.
The cylinders (5) and (5) are connected to the chain of the chain transmission mechanism (2).
(6) Sprocket (7) meshing with the slack side
And the main tilling claw barrel (4) (4)
It is almost within the range of the tip rotation locus (24) of the tilling nail
Driven by the auxiliary pawl shaft driving mechanism (8) configured as described above.
I am trying to .

[0006]

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) is an axle for supporting the power of an engine (9) mounted on a frame extending forward from a mission case to a lower portion of the transmission case via a transmission device in the transmission case. And the vehicle is driven by rotating a wheel (10) fitted on an axle, and the driving operation is performed on a handle portion of a steering handle (11) extending backward from the transmission case. I have. And, the rotary tilling device (R) can be detachably provided at the rear of the transmission case.

A rotary tilling device (R) is provided with a central transmission case (1) mounted in conjunction with a power take-out portion of a transmission case, and a tilling depth setting installed at a rear end of a beam extending backward from the upper portion. It consists of a tail wheel device (12), a cultivation cover (13), and the like, and a tilling shaft (3) orthogonal to the traveling direction is horizontally supported at the lower end of the central transmission case (1). The tilling shaft (3) is driven in a desired rotation direction by a chain transmission mechanism (2) that accommodates the tilling shaft (3) in the transmission case body (1).

The chain transmission mechanism (2) includes a drive sprocket (14) which is mounted on the upper part of the central transmission case (1).
And a passive sprocket (15) wedged at the center of the cultivation shaft (3) with a chain (6) wound therearound. In the example shown in the figure, the chain rotates counterclockwise (A). Has become.

The tilling shaft (3) projects left and right from the central transmission case (1), and the main tilling claw shaft cylinders (4) and (4) are directly mounted on the portion near the projecting end, and they are tilling shafts. It is designed to be driven to rotate in the same direction as (3),
The tilling claws (16) are fixed to the outer periphery of each main tilling claw shaft cylinder (4) in a predetermined arrangement, and these tilling claws are driven into the ground by a down-cut rotation (D). .

On the other hand, bearing holders (17) and (17) provided on both left and right sides of the central transmission case (1) with inclined outer diameter portions inclined at a fixed angle with respect to the axis of the tilling shaft (3). Is provided, and a sub-tilling claw shaft cylinder (5) is provided on each inclined outer diameter part.
(5) is rotatably mounted on a bearing, and each sub-tilling claw shaft cylinder (5) is driven by a sub-claw shaft driving mechanism (8) interlocked with the chain transmission mechanism (2) to form a main tilling claw shaft. It is designed to be rotationally driven in a direction opposite to that of the cylinder (4), that is, clockwise (B).

And a sub-tilling claw shaft cylinder (5) rotating around an axis inclined at a fixed angle with respect to the axis of the tilling shaft (3).
The tilling claws (18) are also fixed to the outer periphery of (5) in a predetermined arrangement, and these tilling claws are obliquely driven into the soil immediately below the central transmission case (1) by up-cut rotation (U). Is configured.

The sub-claw shaft driving mechanism (8) is shown in FIGS.
In the embodiment shown in (1), the configuration is as follows.
A rotating shaft (19) parallel to the cultivating shaft (3) is mounted on the center transmission case (1) in the vicinity of the cultivating shaft (3) as a bearing, and a sprocket (7) is provided at a central portion of the rotating shaft (19). The sprocket (7) is meshed with the slack side of the chain (6) inside the winding of the chain (6), and is the same as the passive sprocket (15) wedged on the tilling shaft. It rotates in the direction (A).

On both left and right sides of the sprocket (7), gears (20) and (20) are wedge-fitted to the rotating shaft (19), and the respective gears (20) and (20) are attached to the tilling shaft (3). ), And a driven gear (2) rotatably fitted to the inner diameter portion of the bearing holder (17).
1) (21) is always meshed, and each driven gear (2)
1) A gear (22) provided at the outer end of the boss portion of (21)
(22) meshes with receiving gear portions (23) (23) formed on the inner diameter of the sub-tilling shaft claw cylinders (5) (5) to constitute a refraction transmission portion. Therefore, the power of the rotating shaft (19) rotating in the same direction as the tilling shaft (3) is transmitted by the gear (2).
0), through the driven gear (21) and the refraction transmission part, as a power of a reverse rotation with respect to the rotation direction of the tillage shaft, a sub-tilt shaft claw cylinder (5).
It is transmitted to (5).

In FIG. 1, (24) is the tip turning locus of the tilling nail fixed to the main tilling nail shaft cylinder, and (25) is the tip turning locus of the tilling nail fixed to the sub-tilling nail shaft. The sub-claw shaft drive mechanism (8) described above is provided so as to be substantially within the range of these trajectories.

FIGS. 1 and 2 show a chain tensioning mechanism 26. The chain tensioning mechanism shown in FIG. 1 and FIG. A support shaft (28) provided with an idle sprocket (27) is fitted inside the support cylinder (29) so as to be able to advance and retreat, and the support shaft (28) is attached to the idle sprocket (2).
7) is configured to have an automatic tension structure in which the spring is biased by a spring (30) in a direction pressed against the chain (6). However, the automatic tension structure can adopt various deformation structures other than the illustration. The chain tensioning mechanism may be provided not with an automatic tensioning structure but with an operation adjusting structure capable of adjusting the tension and relaxation as needed.

FIGS. 4 and 5 show a second embodiment of the present invention. FIG. 4 is a developed sectional view of a transmission, and FIG. 5 is a schematic side view of the transmission structure. The second embodiment differs from the first embodiment shown in FIGS. 1 to 3 in the specific structure of the auxiliary pawl shaft driving mechanism (8), and the other parts are substantially the same as the first embodiment. Therefore, only the portions different from the first embodiment will be described while using the common reference numerals for the portions common to the first embodiment.

In this embodiment, 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 opposite direction (B) to the rotation direction (A) of the tilling shaft (3) while performing the adjustment. Then, another sprocket (31) (31) is attached to the rotating shaft (19) at both left and right sides of the sprocket (7).
Are respectively wedge-fitted, and when the cultivation shaft (3) is located, a portion corresponding to the driven gear (21) of the first embodiment is formed on the driven sprockets (32) and (32), and the left and right sprockets (32) are formed. The reverse rotation chain (33) is wound around each of (31), (32), (31), and (32) to form the sub-claw shaft drive mechanism (8).

[0019]

The present invention is embodied in the form described above, and has the following effects.

A sprocket engaging with the slack side of the chain of the chain transmission mechanism for transmitting power to the main cultivating claw shaft cylinder constitutes an input portion of a sub-claw shaft drive mechanism. By rotating, the wrapping angle of the chain with respect to the input sprocket becomes large, and the driving force transmission to the input sprocket becomes unstable even if the chain pulsates due to the impact load of the tilling nails driven into the soil. Therefore, the rotation drive of the sub-tilling claw shaft cylinder is always performed stably.

Therefore, the cultivating claws of both the main cultivating claw shaft cylinder and the sub cultivating claw shaft are accurately driven into the soil, and the counteracting action due to the rotation of the cultivating claws of the main and sub claw shaft cylinders in opposite directions is always performed. It functions reliably, and good tilling in which the dash phenomenon of the body or the slip phenomenon of the wheels is suppressed is performed.

[0022] Then, the main tilling claw axis cylinder which rotates in contradiction
(4) (4) and the sub-tilling claw shaft barrel (5) (5)
Concentrically mounted on the base (1), the sub-tilling claw shaft cylinder (5)
The sub-claw shaft drive mechanism (8) that rotationally drives (5) is viewed from the side.
The tip of the tilling claw equipped on the main cultivating claw barrel (4) (4)
It was almost within the range of the end rotation locus (24)
The lower part of the central transmission case (1) is simple and compact
And the complicated shape part is outside the rotation locus of the tilling claw.
No longer bulges out into the area, and this is
Together with the soil removal action in the
(1) Adhesion and deposition of cultivated soil on the lower part and the surrounding area
Good tilling is performed with little effort .

[Brief description of the drawings]

FIG. 1 is a developed development of a transmission section showing a main structure of a device of 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 developed development of a transmission section showing another embodiment of the device of the present invention.

FIG. 5 is a schematic side view of the transmission structure of the other embodiment shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Central transmission case 2 Chain transmission mechanism 3 Tilling shaft 4 Main cultivation claw shaft cylinder 5 Secondary cultivation claw shaft cylinder 6 Chain 7 Sprocket 8 Secondary claw shaft drive mechanism 24 Tip rotation locus of cultivation claw

Claims (1)

(57) [Claims] 1. A tilling shaft (3) driven by a chain transmission mechanism (2) in a central transmission case (1) is provided laterally at a lower portion of the central transmission case (1) so as to protrude left and right. The main tilling claw shaft cylinders (4) and (4) are fixedly mounted on the left and right protruding ends of the tilling shaft (3), respectively, and the main A separate sub-tilling claw shaft cylinder (5) (5) is mounted rotatably on each of the sub-tilling claw shaft cylinders (5) concentrically with the tilling nail shaft cylinder, and each sub-tilling claw shaft cylinder (5)
(5) The sprocket (7) meshing with the slack side of the chain (6) of the chain transmission mechanism (2) is used as an input part ,
The tilling claw equipped on the main cultivating claw shaft cylinder (4) (4) in a side view
To be almost within the range of the tip rotation locus (24)
A rotary tilling device characterized in that the rotary tilling device is driven to rotate by a sub-claw shaft driving mechanism (8).