JP2002095302A - Partial reversible rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partially normal and reverse rotatable rotary tiller having two tilling cylinders side by side along the wheel center direction with concentric double axes which rotate normally and reversely to each other, easy to maintenance and free from entanglement of grasses and straws. SOLUTION: This partial reversal system for rotary tiller shaft seals a space between the normal rotation output axis and the outside engaging reverse rotation output axis by a first shaft sealing, installs a second shaft seal between the outside diameter of the reverse output axis and the tilling case, extends the reverse output axis to the outside of the second seal installing part and installs a transmission connecting part transmitting power to the inside diameter part of the second tilling cylinder from the extended part, covers an outer periphery of the outside end of the second tilling cylinder by a margin of a protecting cover rotating with the normal rotation output axis, and sets the inside end of the cylinder of the second tilling cylinder to rotate overlapping with the side part of the tillage case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partially inverted rotary tilling apparatus in which a rotary claw shaft cylinder having a predetermined tilling width is constituted by a plurality of tilling cylinders rotating in opposite directions.

[0002]

2. Description of the Related Art Conventionally, a forward drive shaft and a reverse drive output shaft of a power transmission mechanism accommodated in a tilling case are formed into a concentric double shaft, and are supported on the tilling case so that each rotates independently. Lay it horizontally
The first cultivation cylinder of the first and second cultivation cylinders juxtaposed in the axial direction of both output shafts is driven to rotate by the forward rotation output shaft, and the second cultivation cylinder is transmitted from the reverse rotation output shaft. 2. Description of the Related Art There is known a partial reverse rotary tilling apparatus which is driven to rotate in a direction opposite to that of a first cultivating cylinder with a power (see, for example, Japanese Patent Publication No. 46-39041).

[0003]

In the conventional partial reverse rotary tilling apparatus, the inner cylinder portion of the second tilling cylinder rotating in the opposite direction to the first tilling cylinder is placed inside the tilling case (tiling case). -The support tube is inserted into and supported by the support tube, and an interlocking joint with the reverse output shaft is formed at the insertion portion, and the outer diameter of the reverse output shaft is provided outside the interlocking joint. An oil seal that seals the shaft between the inner cylinder of the second tilling cylinder and the inner cylinder of the second tilling cylinder, and another seal between the outer cylinder of the second cultivating cylinder and the outer cylinder of the tilling case. Since the inside of the cultivation case is sealed with a shaft, the internal structure and the shaft sealing structure are complicated and the assembly and disassembly are not easy, and maintenance is difficult. There was a problem that the lubricating oil in the case leaked out. Further, in the conventional one, it is inevitable that grass straws and the like are wrapped around both ends of the second cultivation cylinder driven by the reverse rotation output shaft in a tightened manner and become enormous. There have been difficulties in that various adverse effects such as deterioration and seal damage occur.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, in which a forward output shaft and a reverse output shaft of a transmission mechanism housed in a tilling case are concentric double shafts. The two tilling cases are mounted horizontally on the tilling case so that they can rotate independently, and are located on the axially outer side of the first cultivating tube and the second cultivating tube arranged side by side in the axial direction of both output shafts. A first reverse rotator that rotates the first tilling cylinder to be rotated by the forward rotation output shaft and rotates the second tilling cylinder positioned inside the axial center in the direction opposite to the first tilling cylinder by the reverse rotation output shaft. In a tilling apparatus, a first seal is interposed between a forward rotation output shaft and an inner diameter of a reverse rotation output shaft externally fitted thereto, and a second seal is provided between an outer diameter of the reverse rotation output shaft and a tilling case. -The reverse output shaft is extended outward from the second seal-interposed portion with the interposed portion, and the second plow is extended from the same portion to the outwardly extended portion. A power transmission connecting portion for transmitting power to the inner diameter portion of the cylinder is provided, and a peripheral edge of a protective cover rotating together with the normal rotation output shaft is provided on an outer peripheral portion of an outer cylinder end of the second tilling cylinder rotating in a direction opposite to the normal rotation output shaft. And the inner cylinder end of the second cultivation cylinder overlaps with the lateral side surface of the cultivation case so as to rotate.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The drawings show a specific example of a center-drive type partially reversing rotary tilling device in which a second tilling tube is an inclined tilling tube. FIG. 1 is a cross-sectional view of a main part of a partial reverse rotation tillage device according to the present invention, FIG. 2 is a cross-sectional view showing an enlarged part thereof, and FIG. FIG.

In FIGS. 1 and 2, a tillage case (1)
Is a vertical opening (L) in the left and right walls below it
(2) (2) is opened, and the outside of each opening (2) (2) is configured to be closed by lids (3) (3) fastened and attached to the periphery of the opening. . Each of the lids (3) has a main transmission mechanism among the transmission mechanisms contained in the tilling case (1).
A portion for bearing support of the shaft end of the intermediate rotary shaft (5) interlocking with (4) is provided, and at a separate place, a support cylindrical portion (3a) extending outward is integrated. It is formed in.

[0007] The main transmission mechanism (4) of the transmission mechanisms accommodated in the tilling case (1) is a normal rotation of a horizontal shaft core (O1) provided laterally below the tilling case (1). The power shaft (6) is configured as a chain transmission mechanism that is operatively connected to an input shaft provided above the tillage case (not shown), and the intermediate rotation shaft (5) is a forward rotation output shaft.
A sprocket that is higher in transmission than (6) and is provided in parallel with the forward rotation output shaft (6), and is associated with the chain transmission mechanism.
It is designed to be rotationally driven by (7). In addition,
(8) is a passive sprocket fitted to the center of the forward rotation output shaft (6), (9) is a chain, and (10) is a tension sprocket.

Drive gears (11) and (11) are fitted to left and right sides of the sprocket (7) of the intermediate rotary shaft (5), and a passive gear (12) is attached to each of the drive gears (11) and (11). ) And (12) are always meshed with each other and the sub-transmission mechanism (GL) (GR) of the transmission mechanism
The drive gear and the passive gear that always mesh
(11) (12), (11) and (12) are the above-mentioned tilling cases.
It is disposed so as to fit into the opening holes (2) and (2) of (1).

A sub-transmission mechanism (GL) (GR) is provided with a second
The tilling cylinders (13) and (13) are connected to the forward rotation output shaft of the main transmission mechanism (4).
(6) for driving in a direction opposite to that of (6), and the passive gears (12) and (12) in each sub-transmission mechanism (GL) (GR) are provided with respective sub-transmission mechanisms (GL) (GL). GR)
Are formed integrally with the inner ends of the reverse output shafts (12a) and (12a). The reverse output shaft (12a) of each sub transmission mechanism (GL) (GR) is rotatably connected to the forward output shaft (6) of the main transmission mechanism (4) via a needle bearing (14). The first seal (15) is provided on the outer side of the needle bearing (14) so as to be externally fitted and provided concentrically with the forward rotation output shaft (6) of the main transmission mechanism (4). Both forward and reverse output shafts interposed (6)
The shaft is sealed between the fitting surfaces (12a).

The reverse output shafts (12a) (12a) of the respective sub-transmission mechanisms (GL) (GR) are connected to the supporting cylinders of the lids (3) (3) via a plain metal (16). (3a) Fitted inside the bore of (3a), the outer diameter of the reverse output shaft (12a) (12a) and the support cylinder (3a) at the outer end of the support cylinder (3a) (3a).
A shaft is sealed between them by a second seal (17) interposed between the inner diameter hole and the inner diameter hole of (3a).

The second seal (17) is formed of an elastic material such as oil-resistant rubber, and has an inner diameter portion (17a) formed in an involute spline hole and a boss portion (12a).
The outer lip portion (17b) is provided so as to be in contact with the inner peripheral surface of the support cylinder portion (3a), while being externally fitted to an involute spline portion engraved on the outer diameter portion of the support cylinder portion (3a). .

The reverse output shaft (1) of the sub-transmission mechanism (GL) (GR)
2a) and (12a) extend outward from the outer ends of the support cylinders (3a) and (3a), which are portions of the tilling case (1), and the involute splines are respectively provided on the extended portions. It is engraved, and each involute spline has a spur
The gear (18) is fitted and fixed, and the spur gear (18) is meshed with an internal gear (19) (19) formed on the inner diameter of the second cultivation cylinder (13) (13). The second tiller (13) (1
A transmission connecting portion (20) (20) for rotating and driving the component (3) is configured.

Each of the second tilling cylinders (13) and (13) has an axis (O2) inclined at a fixed angle with respect to the axis (O1) of the output shafts (6), (12a) and (12a). To rotate around
It is rotatably supported on the outer diameter of the support cylinder part (3a) via a bearing (21), and the inner cylinder end in the axial direction is the inner diameter of the same part and the outer diameter of the support cylinder part (3a). The shaft is sealed by a normal oil seal (22) interposed therebetween, and the inner tube end of each second tilling tube (13) overlaps with the lateral side surface of the tilling case (1). It is designed to rotate. Also, each second
The end of the outer cylinder in the axial center direction of the cultivation cylinder (13) has a flexible sheet attached between its inner diameter and the outer diameter of the reverse output shaft (12a).
The shaft (23) is sealed by a screw (23) so as to be able to follow the change in interval due to the tilt rotation of the second tilling tube (13).

The bending seal (23) is interposed between the reverse output shaft (12a) and the second tilling cylinder (13) as shown in FIG. A collar that protects the bendable part as long as it does not hinder the movement of the part
(24) is attached to the outside.

Further, the outer peripheral portion of the outer cylinder end of each second tilling cylinder (13) is formed as a spherical portion (13a) centered on the intersection (P) of the two axial cores (O1) and (O2). Meanwhile, the collar
A protective cover (25) located further outside of (24) is provided so as to rotate with the forward rotation output shaft (6), and its outer peripheral edge has a spherical surface whose inner surface is at least similar to the spherical portion (13a). The spherical bowl-shaped portion is overlapped with the spherical-shaped portion (13a) without being in contact with the spherical-shaped portion (13a), and the flexible cover is formed by the protective cover (25). Le
(23) is doubly protected.

In this manner, the required number of tilling claw mounting seats (26) are provided in the second tilling cylinder (13), and each tilling claw mounting seat (26) is provided.
The tilling claws (27) and (28) are attached to the fins. Further, the first cultivation cylinders (30) and (30) are arranged so that the protection cover (25) is connected to the normal output shaft.
(6), and it is detachably inserted into the forward rotation output shaft (6) from the outside and fixed by wedge fixing. The required number of tilling claw mounting seats (31) are provided on the outer periphery. A common tilling flat claw (32) is attached to each mounting seat.

The present invention can be applied to a rotary tilling device for a general cultivator, a management device or a small and light machine such as a tiller, as well as a rotary tilling device for a riding tractor. The present invention is not limited to the center-drive type rotary tilling device, and may be applied to the side-drive type rotary tilling device. Can be applied so as to exhibit the same function by changing the positions at both ends of the first tiller.

[0018]

As described above, according to the present invention, the tilling can
The forward rotation output shaft (6) and the reverse rotation output shaft (12a) of the transmission mechanism accommodated in the housing (1) are formed into a concentric double shaft so that each can rotate independently on the tilling case (1). Horizontally mounted bearings, both output shafts
(6) First tilling cylinder (30) juxtaposed in the axial direction of (12a)
And the first cultivation cylinder (30) located on the outside in the axial direction among the second cultivation cylinders (13) is driven to rotate by the forward output shaft (6), and the second cultivation cylinder ( 13) In a partial reverse rotary tilling device that rotates the first output shaft (30) by a reverse output shaft (12a) in the opposite direction, a forward output shaft (6) and a reverse output shaft externally fitted thereto. A first seal (15) is interposed between the inner shaft and the inner diameter of the reverse output shaft (1a).
The second seal (1) is provided between the outer diameter of 2a) and the tillage case (1).
7), the reversing output shaft (12a) is extended outward from the second seal (17) interposed portion, and the second tilling cylinder (13) is extended from the portion to the outwardly extending portion. A transmission connecting portion (20) for transmitting power to an inner diameter portion of the second tilling tube (13) rotating in a direction opposite to the forward rotation output shaft (6) is provided on an outer periphery of an outer cylinder end of the second tilling tube (13). The peripheral edge of the protective cover (25) that rotates together with (6) is covered, and the inner cylinder end of the second tilling cylinder (13) overlaps with the lateral side of the tilling case (1). Since it is made to rotate, the internal configuration and shaft seal configuration of the tilling case (1) are simplified as compared with the conventional one, making assembly and disassembly easy and the like.
Even if the cultivation cylinder (13) is removed, the lubricating oil in the cultivation case (1) does not flow out and maintenance can be easily performed. Further, the forward rotation output shaft (12a) is used for the forward rotation output shaft. Second tilling tube (13) rotated in the opposite direction to (6)
It is possible to prevent the grass straws and the like from being wound around the ends of the two cylinders in a tight manner, and to operate satisfactorily.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a partial reverse rotation tillage device according to the present invention.

FIG. 2 is an enlarged sectional view of a part of FIG.

FIG. 3 is an enlarged partial view of a part of the seal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tilling case 4 Main transmission mechanism 6 Forward rotation output shaft 12a Reverse rotation output shaft 13 2nd cultivation cylinder 15 1st seal 17 2nd seal 30 1st cultivation cylinder GL Sub transmission mechanism GR Sub transmission mechanism

Claims (1)

[Claims] 1. A forward rotation output shaft (6) and a reverse rotation output shaft (12a) of a power transmission mechanism housed in a tilling case (1) are coaxially double shaft-shaped so that they can rotate independently. The shaft of the first cultivating cylinder (30) and the second cultivating cylinder (13), which are mounted laterally on the tilling case (1) and are juxtaposed in the axial direction of both output shafts (6) and (12a). The first tilling cylinder (30) located on the outer side in the core direction is rotated forward by the output shaft (6).
And the second is located on the inner side in the axial direction.
The tilling tube (13) is rotated by the reverse output shaft (12a) to the first tilling tube.
In a partial reverse rotary tilling device driven to rotate in a direction opposite to the direction (30), a first seal is provided between a forward output shaft (6) and an inner diameter of a reverse output shaft (12a) externally fitted thereto. (15) and a second seal (17) between the outer diameter of the reverse output shaft (12a) and the tillage case (1). The reverse output shaft (12a) extends outward from the interposed portion, and a transmission connecting portion (20) for transmitting power from the extended portion to the inner diameter portion of the second tilling tube (13) is provided in the outwardly extending portion. A protective cover (2) that rotates together with the forward output shaft (6) is provided on the outer periphery of the outer cylinder end of the second tilling tube (13) that rotates in the opposite direction to the forward output shaft (6).
5) The peripheral portion of the cultivation case (1) is covered with a crown, and the end of the inner cylinder of the second cultivation tube (13) is overlapped with the lateral side surface of the cultivation case (1) so as to rotate. Rotary rotary tilling device to reverse.