JP2878200B2 - Rotary tillage equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sub-claw shaft cylinder externally supported by a sub-claw shaft holder provided below a transmission case, and fitted to a rotary shaft inserted and supported by the sub-claw shaft holder. The main claw shaft tube is formed with the main claw shaft tube, and the main claw shaft tube and the sub claw shaft tube of this tillage rotary are engaged with the chain of the same mechanism as the chain transmission mechanism in the transmission case. A rotatable drive in a direction opposite to each other by a reverse rotation transmission mechanism having a sprocket as an input portion.
The present invention relates to a tall tillage device.

[0002]

2. Description of the Related Art Rotary tilling devices of this kind are, for example,
It is already known from Japanese Patent Publication No. 46-39041.

[0003]

In the conventional rotary tilling apparatus, means for increasing the winding angle of the chain around the sprocket, which is the input portion of the reverse rotation transmission mechanism, has not been taken. There is a problem that power transmission to the reverse rotation transmission mechanism becomes unstable. Also,
The lower part of the transmission case is swelled to the left and right, and a sub-claw shaft holder is provided outside the swelling part, so that the lateral width of the lower part of the transmission case is remarkably widened and the front and rear width of the transmission case is narrowed. Since no consideration was given, there was a problem that the lower part of the transmission case became large and disadvantageous in the residual tillage treatment immediately below.

[0004]

According to the present invention, it is not possible to stably transmit power to the reverse transmission mechanism by increasing the winding angle of the chain around the sprocket, which is the input portion of the reverse transmission mechanism. For this reason, the lower part of the transmission case is made compact so that the residual tilling treatment immediately below the transmission case can be advantageously performed.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described with reference to the drawings. In FIG. 3, a cultivator (T) includes a transmission case from an engine (9) mounted on a frame extending forward from a mission case. Power is transmitted to the axle at the lower part of the transmission case through a transmission in the vehicle, and the vehicle is driven by rotating the wheels (10) fitted to the axle, and the driving operation is postponed from the transmission case. The operation is performed at the handle of the steering handle (11). A rotary tilling device (R) can be detachably provided at the rear of the mission case.

[0006] The rotary tiller (R) is a mission cage.
Transmission case that is mounted in conjunction with the power take-out part of the motor
(1), a tilling rotary (R1) installed laterally below the transmission case (1), and a rear end of a beam extending from the upper portion of the transmission case (1). Tail wheel device (12) for setting the till depth
It is composed of a tilling cover (13), etc.
Tally (R1) is composed of main claw shaft cylinders (4) and (4) and sub-claw shaft cylinders (5) and (5) described later.

As shown in FIG. 1, the transmission case
The lower portion of (1) is formed in a narrow portion (1a) having a smaller left and right width than the upper portion of the case, and the sub-jaw shaft holders (17) are provided on both left and right sides of the narrow portion (1a). ) (17) are provided respectively.

The auxiliary pawl shaft holders (17) and (17) are arranged such that the inner peripheral edges of the holes (17a) and (17a) coincide with the holes formed in the left and right walls of the transmission case (1). A lower portion of a chain transmission mechanism (2) for transmitting power to the main claw shaft cylinders (4) and an internal space formed by them and the transmission case (1) and being interlocked therewith. And a reverse rotation transmission mechanism (8).

Each of the auxiliary pawl shaft holders (17) and (17) is integrally provided with a support cylindrical portion having an outer diameter portion inclined outward and downward at a constant angle with respect to the horizontal axis. The outer claw shaft barrels (5) and (5) are rotatably supported on the outer diameter, respectively.
The main claw shaft cylinders (4) and (4) are respectively attached to a rotating shaft (3) which penetrates and supports the inner hole of the support cylinder portion and extends left and right, and the tilling rotary (R1) is constituted. You.

The chain transmission mechanism (2) comprises a drive sprocket (14) which is supported on the upper part of the transmission case (1) and a lower sprocket (15) which is wedge-mounted on the center of the rotary shaft (3). And the main hook shaft cylinders (4) and (4) attached to the rotating shaft (3) are rotated in the counterclockwise direction (A).
The tilling claws (16) provided in a predetermined arrangement on each of the main claw shaft cylinders (4) (4) are driven into the soil by a down-cut rotation (D). (24) shows the tip rotation locus of the tilling nail fixed to the main nail shaft cylinder.

Further, the reverse transmission mechanism (8) (8) is configured as follows. That is, an intermediate shaft (19) parallel to the rotating shaft (3) is provided horizontally in the narrow portion (1a) higher than the lower sprocket (15), and the input sprocket ( 7) wedge the input sprocket (7)
Is engaged with the inner circumference of the chain on the slack side of the chain (6), and furthermore, the intermediate shaft (1) on both left and right sides of the input sprocket (7).
Gears (20) and (20) are wedge-fitted to 9), and each gear (2)
0) and (20) are meshed with driven gears (21) and (21) rotatably fitted on the rotary shaft (3) and inserted and supported in the inner holes of the auxiliary pawl shaft holders (17) and (17). The interlocking portion for the chain transmission mechanism (2) is formed, and the interlocking portion changes the rotational power of the intermediate shaft (19) in the counterclockwise direction (A) to the rotational power in the clockwise direction (B) to change the driven gear (21). ) (21).

[0012] Gears (22) and (22) are provided at the outer extended ends of the boss portions of the driven gears (21) and (21), respectively.
Each of the gears (22) and (22) is engaged with a receiving gear (23) (23) formed on the inner diameter of the sub-claw shaft cylinder (5) (5) to form a refraction transmission part. Refraction transmission parts (22) (23), (2
2) With the power transmitted through (23), the sub-claw shaft cylinders (5) and (5) are rotated around the axis which is inclined outward and downward at a certain angle with respect to the horizontal axis, and the main claw shaft cylinders (4) and (4). ) Is rotated in the direction (B) opposite to the direction (B), and the tilling claw (18) mounted on each of the sub-claw shaft cylinders (5) (5) is rotated by the up-cut rotation (U) to rotate the transmission case (1). ) It is constructed so that it can be driven diagonally into the soil directly below. (25) shows the tip turning locus of the tilling nail fixed to the auxiliary nail shaft cylinder.

Further, a chain tensioning mechanism (26) having a tension idler (27) which is engaged on the slack side of the chain (6) from outside around the slack side of the chain (6) in the upper portion near the portion where the chain is wound around the input sprocket (7). The tension idler (27) is disposed in the narrow portion (1a) of the transmission case (1) together with the lower sprocket (15) and the input sprocket (7), and the tension idler (27) is provided. The idler (27), lower sprocket (15) and input sprocket (7) are
As seen from the side, the transmission case (1) is arranged in a substantially straight line along the longitudinal direction of the transmission case (1) in a side view.

The chain tensioning mechanism (26) shown in the figure has a pivot shaft having a tension idler (27) at its tip.
(28) is connected to the support cylinder (2) provided in the transmission case (1).
The support shaft (28) is configured to have an automatic tension structure which is elastically urged by a spring (30) in a direction in which the tension idler (27) is pressed against the chain (6). However, the automatic tensioning structure is not limited to the one shown in the drawing, and various other modified structures can be adopted. It can also be provided as an adjustment structure.

[0015]

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

The input sprocket (7) of the reverse rotation transmission mechanism (2)
Is pressed and tensioned by a tension idler (27) disposed above and near the input sprocket (7), whereby the angle at which the chain (6) is wound around the input sprocket (7) is reduced. The power transmission to the reverse transmission mechanism (2) is performed stably.

Further, while having a tension idler (27), the tension idler (27) is located in the narrow portion (1a) of the transmission case together with the input sprocket (7) and the lower sprocket (15). In addition, since the transmission case (1) is provided so as to be arranged substantially in a straight line along the longitudinal direction of the transmission case (1) in a side view, the width and the front-rear width of the lower portion of the transmission case (1) are both reduced. Part becomes compact overall,
Transmission case (1) Residual tillage treatment directly underneath can be advantageously performed.

[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.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transmission case 2 chain transmission mechanism 4 main claw shaft cylinder 5 sub claw shaft cylinder 6 chain 7 input sprocket 8 reverse rotation transmission mechanism 27 tension idler R1 tillage rotary

Claims (1)

(57) [Claims] A sub-claw shaft cylinder (5) is mounted on the outer periphery of a supporting cylinder portion of a sub-claw shaft holder (17) mounted on the left and right sides of a narrow portion (1a) of a lower part of a transmission case (1). (5) is rotatably supported, and the main claw shaft cylinders (4) and (4) are attached to the rotating shaft (3) which extends through the center hole of the support cylinder part and extends right and left. The rotary (R1) is composed of a main claw shaft tube (4) and a sub claw shaft tube (5).
(5) is replaced with a chain transmission mechanism (2) in the transmission case (1) and a reverse rotation transmission mechanism (8) (8) with a sprocket (7) meshing with the chain (6) of the mechanism (2). 8) In the rotary tillage device which is driven to rotate in a manner opposite to the above, the reverse transmission mechanism (8) (8)
The input sprocket (7) is arranged on the upper part adjacent to the lower sprocket (15) of the chain transmission mechanism (2) fitted to the rotating shaft (3), and is disposed on the upper part near the sprocket (7). A tension idler (27) for pressing the chain (6) in a tensioning direction is arranged, and the tension idler (27), the lower sprocket (15) and the sprocket are provided.
(7) are both located in the narrow portion (1a) of the transmission case (1),
A rotary tilling device configured to be arranged substantially in a straight line along the longitudinal direction of the transmission case (1) in a side view.