JPH09103101A - Rotary plowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary plowing device capable of prohibiting a dashing phenomenon and performing a good plowing by rotating and driving with a sub claw shaft driving mechanism constituted by a sub plowing claw shaft cylinder having a sprocket biting to the slackened side of a chain in a chain transmission mechanism as an inputting part. SOLUTION: This rotary plowing device is provided by installing with spanning a plowing shaft driven by a chain transmission mechanism 2 located in a central transmission case 1, and protruded to left and right at the lower part of the central transmission case 1, fixing each of main plowing claw shaft cylinders 4 to positions close to the protruded ends at the left and right of the central plowing shaft, installing with supporting also each of sub plowing claw shaft cylinders 5 different from the main plowing claw shaft cylinders 4 as freely rotatable at both of the left and right side positions close to the central transmission case 1, and driving with rotating each of the sub plowing claw shaft cylinders 5 with a sub claw shaft driving mechanism 8 constituted by a sprocket 7 biting to the slackened side of a chain 6 of the chain transmission mechanism 2 as an inputting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a main plowing pawl shaft cylinder on a portion of a drive shaft projecting leftward and rightward from a central transmission case near the projecting end thereof, and at the same time, the left and right proximate to the central transmission case. The side part is equipped with a sub-cultivating claw shaft cylinder that is separate from the main tilling claw shaft cylinder, and is fastened to the sub-cultivating claw shaft cylinder by driving the sub-cultivating claw shaft cylinder in reverse with respect to the main cultivating claw shaft cylinder. The present invention relates to a rotary tilling device adapted to drive a tilling nail into the soil in a manner opposite to that of a main tilling nail shaft cylinder.

[0002]

2. Description of the Related Art Rotating tillers include a down-cut type in which a plowing pawl is turned in the direction of travel of the machine body to rotate from the front to the rear, and a rotary plowing device is rotated in the direction of travel of the machine from the back to the front. There is an upcut type, but in the downcut type, the driving load of the tilling claw acts in a direction that promotes the propulsion of the aircraft, so the dash phenomenon of the aircraft easily occurs, and in the upcut type, Since the reaction force of the plowing claws works in the direction to suppress the airframe propulsion, the wheel slip phenomenon easily occurs, and proper plowing tends to be difficult in any case.

For this reason, for example, Japanese Patent Publication No. 46-3904.
As can be seen in Japanese Patent Laid-Open No. 1, a sub-cultivating pawl shaft cylinder, which is a separate body from the main plowing pawl shaft cylinder fixed to the protruding end portion of the drive shaft protruding laterally from the central transmission case, is provided. -Installed rotatably on both left and right sides of the sprocket and driving the sub-plowing claw shaft cylinder in the opposite direction to the main cultivating claw shaft cylinder so that the cultivating claw and sub-cultivating claw of the main cultivating claw shaft cylinder It has been proposed to suppress the dash phenomenon of the airframe or the slip phenomenon of the wheels by canceling each other by rotating the tillage claws of the shaft cylinder in the anti-reverse direction.

[0004]

In the device of this type, the left and right main tillage claw shaft cylinders are directly mounted on the tiller shaft driven by the chain transmission mechanism in the central transmission case. The sub-cultivating pawl shaft cylinder, which is rotationally driven in the same direction as that of the main transmission case and is provided at the right and left side adjacent portions of the central transmission case, is a sub-pawl shaft drive mechanism using a sprocket meshing with the chain of the chain transmission mechanism as an input portion. In the conventional device, the sprocket, which is the input part of the sub-claw shaft drive mechanism, is installed on the tension side of the chain of the chain transmission mechanism. Since it was meshed, the chain winding angle was small,
If the chain pulsates due to the impact load of the plowing nail group that is fixed to the main tillage claw barrel and the sub tillage claw barrel due to the impact load, the transmission of the driving force to the sprocket becomes unstable and the rotation of the sub tillage claw barrel occurs. There is a problem that the driving is not performed stably.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a sub-claw shaft drive mechanism is constructed by using a sprocket that meshes with a slack side of a chain of a chain transmission mechanism for transmitting power to a main tillage claw shaft cylinder as an input portion. The shaft drive mechanism is used to drive the sub-cultivating claw shaft cylinder to rotate. Then, the sprocket, which is the input part of the sub-claw shaft drive mechanism, meshes with the slack side of the chain of the chain transmission mechanism to increase the chain winding angle, and the plowing claws of the main and sub-cultivating claw shaft cylinders. Even if the chain pulsates due to the impact load due to driving into the soil, the driving force transmission to the sprocket does not become unstable, and the sub-tiling claw shaft cylinder is rotationally driven constantly.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a development view of a transmission cross section showing the structure of a main part of the device of the present invention, and FIG. 2 is a side view of the transmission part. FIG. 3 is a schematic side view of a cultivator in which the device of the present invention is implemented.

In FIG. 3, a cultivator (T) is an engine mounted on a frame extending forward from a mission case.
The power of (9) is transmitted to the axle supported on the lower part of the mission case via the transmission device in the mission case, and the wheels (10) fitted to the axle are rotationally driven to travel. The driving operation is configured to be performed at the handle portion of the steering handlebar (11) extending rearward from the mission case. A rotary tiller (R) can be detachably attached to the rear part of the mission case.

[0008] The rotary plow (R) is a mission cage.
Transmission gear attached to the power take-out part of the
The center transmission cable (1), the tail wheel device (12) for setting the tilling depth installed at the tail portion of the beam extending from the top, the tiller cover (13), etc. At the lower end of the stool (1), a cultivating shaft (3) orthogonal to the traveling direction is horizontally supported, and the cultivating shaft (3) is housed in the transmission case body (1). The mechanism (2) is designed to drive in the desired rotation direction.

The chain transmission mechanism (2) is a central transmission case.
A drive sprocket (14) mounted on the upper part of (1) and a passive sprocket (1) wedged to the central part of the cultivating shaft (3).
5) and a chain (6) are hung around it, and in the example shown in the figure, it rotates counterclockwise (A).

Further, the tiller shaft (3) is projected from the central transmission case (1) to the left and right, and the main tillage 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) (at the left and right sides of the central transmission case 1) are provided with inclined outer diameter portions which are inclined at a constant angle with respect to the axis of the tilling shaft (3). 17) is provided,
The sub-cultivating claw shaft cylinders (5) and (5) are rotatably mounted on bearings in the respective inclined outer diameter portions, and the sub-cultivating claw shaft cylinders (5) are configured to interlock with the chain transmission mechanism (2). The auxiliary claw shaft drive mechanism (8) is rotationally driven in the opposite direction to the main tillage claw shaft cylinder (4), that is, in the clockwise direction (B).

[0012] The sub-cultivating 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 sub-claw shaft drive mechanism (8) is constructed as follows in the embodiment shown in FIGS. A rotary shaft (19) parallel to the cultivating shaft (3) is horizontally mounted on the central transmission case (1) in the vicinity of the cultivating shaft (3), and a sprocket (19) is attached to the central part of the rotary shaft (19). 7) is wedged, and the sprocket (7) is engaged with the loose side of the chain (6) inside the winding of the chain (6), and the passive sprocket (15) is wedged on the tiller shaft. It rotates in the same direction as (A).

Then, gears (20) and (20) are wedged to the rotary shaft (19) at both right and left sides of the sprocket (7), and the respective gears (20) and (20) are attached to the cultivating shaft (3). ) Rotatably fitted to the driven gears (21) and (21) rotatably fitted in the bearing holder (17) and rotatably fitted and supported in the inner diameter portion of the bearing holder (17), and each driven gear (21) The gears (22) and (22) provided on the outer end of the boss portion of (21) are attached to the auxiliary tillage shaft pawl tube (5).
A refraction transmission portion is formed by meshing with the receiving gear portions (23) and (23) formed in the inner diameter portion of (5). Therefore, the power of the rotary shaft (19) that rotates in the same direction as the cultivating shaft (3) is reverse to the rotating direction of the cultivating shaft via the gear (20), the driven gear (21) and the refraction transmission part. As sub-plow shaft nail tube (5) (5)
It is transmitted to.

Incidentally, (24) in FIG. 1 is a tip turning locus of the tilling claw fixed to the main tillage claw shaft cylinder, and (25) is a tip turning locus of the tilling claw fixed to the sub tillage claw shaft. The auxiliary claw shaft drive mechanism (8) described above is provided so as to be substantially within the range of these loci.

Further, (26) in FIGS. 1 and 2 is a chain tension mechanism, and the one shown in the figure meshes with the slack side of the chain (6) from the outside in the vicinity of the winding part around the sprocket (7). Spindle with idle sprocket (27)
(28) is fitted inside the support tube (29) so that it can move back and forth, and its support shaft
(28) is configured as an automatic tension structure in which the idle sprocket (27) is elastically biased by the spring (30) in the direction in which it is pressed against the chain (6). The structure can be adopted, and the chain tension mechanism may be provided not by the automatic tensioning structure but by an operation adjusting structure capable of adjusting tension and relaxation as needed.

4 and 5 show a second embodiment of the present invention. FIG. 4 is a development view of a transmission section, 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 sub-claw shaft drive mechanism (8), and the other parts are substantially the same as in the first embodiment. Therefore, while using the common reference numerals for the portions common to the first embodiment, only the portions different from the first embodiment will be described.

In this embodiment, the sprocket (7) wedged at the center of the rotary shaft (19) is meshed with the slack side of the chain (6) from the outside to function as a chain tensioning mechanism. While performing the adjustment, the tiller shaft (3) is rotated in a direction (B) opposite to the rotating direction (A). Then, in the left and right side portions of the sprocket (7), the sprocket (31) (31) is wedged to the rotary shaft (19), respectively, and the cultivating shaft (3) is in the first embodiment. Example driven gear
The part corresponding to (21) is the driven sprocket (32) (32)
Left and right sprockets (31) (32), (31)
The reverse chain (33) is wound around each of (32) to form the auxiliary pawl shaft drive mechanism (8).

[0019]

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

A sub-claw shaft drive mechanism is configured by using a sprocket that meshes with the slack side of the chain of the chain transmission mechanism for transmitting power to the main tillage claw shaft cylinder as an input portion, and the sub-claw shaft drive mechanism is used to form the sub-cultivation claw shaft cylinder. Rotational drive increases the wrap angle of the chain to the input sprocket, and the driving force transmission to the input sprocket becomes unstable even if the chain pulsates due to the impact load of the plowing claw group driven into the soil. Therefore, the rotary drive of the sub-tiling claw shaft cylinder is always performed stably.

Therefore, the plowing nails of both the main tillage claw shaft cylinder and the sub tillage claw shaft are accurately driven into the soil, and the counteracting action of the main and auxiliary both claw shaft cylinders due to the rotation of the tilling claws in the diametrical direction is always maintained. As it functions reliably, good plowing is performed in which the dash phenomenon of the airframe or the wheel slip phenomenon is suppressed.

[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.

5 is a schematic side view of the transmission structure of another embodiment shown in FIG. 4. FIG.

[Explanation of symbols]

 1 central transmission case 2 chain transmission mechanism 3 tilling shaft 4 main tilling claw shaft cylinder 5 sub tilling claw shaft cylinder 6 chain 7 sprocket 8 auxiliary claw shaft drive mechanism

Claims (1)

[Claims] 1. A chain transmission mechanism in a central transmission case (1).
The tiller shaft (3) driven by (2) is laterally provided at the lower part of the central transmission case (1) so as to project to the left and right, and the left and right protruding end portions of the tiller shaft (3). Main tillage shaft cylinder (4)
While mounting (4) respectively, central transmission case (1)
The sub-cultivating claw shaft cylinders (5) (5), which are separate from the main tilling claw shaft cylinders, are rotatably mounted on the left and right side portions of the sub-cultivating claw shaft cylinders (5). (5) is rotationally driven by a sub-claw shaft drive mechanism (8) configured with a sprocket (7) that meshes with the slack side of the chain (6) of the chain transmission mechanism (2) as an input portion. A rotary tilling device characterized by being present.