JP2002223601A - Partially reversing rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partially reversing rotary tiller which is operable with a high durability and easy maintenancablity and comprises a plurality of rotating tillage cylinders rotating in the opposite direction. SOLUTION: This partially reversing rotary tiller has an output axis of the main transmission system rotating a first tillage cylinder and the output axis of a sub transmission system rotating a second tillage cylinder in the opposite direction to the first tillage cylinder as independently rotatably concentric double axes laterally supported in the supporting cylinder part of a tillage case, shaft sealing a space between the output axis of the main transmission system and an inner diameter of the output axis of the sub transmission system inserting the output axis of the main transmission system with a dust seal and shaft sealing a space between outer diameter of the sub transmission system and an inner diameter of the supporting cylinder part with a seal, extending the output axis of the sub transmission system to outside of the supporting cylinder part, on the other hand setting the driving power transmitted to the second tillage cylinder from the extended part from the supporting cylinder of the output axis, and forming the inside of the second tillage cylinder including the power transmitting part isolated from inside of the tillage case including the supporting cylinder and fill the space with grease.

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, an output shaft of a main transmission mechanism formed in a tilling case and an output shaft of a sub transmission mechanism rotating in the opposite direction to the output shaft of the main transmission mechanism are coaxial double shafts. And the first cultivating cylinder of the first cultivating cylinder and the second cultivating cylinder arranged side by side in the axial center direction of both output shafts are horizontally mounted on the tilling case so that each can rotate independently. A partial reverse rotation rotor that is driven to rotate by the output shaft of the transmission mechanism and that the second cultivation cylinder is driven to rotate in the opposite direction to the first cultivation cylinder by the power transmitted from the output shaft of the auxiliary transmission mechanism. Tari cultivation devices are known (for example, see Japanese Patent Publication No. 46-39041).

[0003]

In the conventional partial reverse rotary tilling apparatus disclosed in the above-mentioned document, the inner cylinder portion of the second tilling cylinder which rotates in the opposite direction to the first tilling cylinder is provided with a tilling tube. -An interlocking mechanism with the output shaft of the auxiliary transmission mechanism is inserted into and supported in the inside of the case (the bore of the support cylinder connected to the tillage case), and the outer side of this interlocking mechanism In the part,
An oil seal is provided to seal the shaft between the outer diameter of the output shaft of the auxiliary transmission mechanism and the inner diameter of the inner cylinder of the second cultivation cylinder, and the outer diameter of the inner cylinder of the second cultivation cylinder and the cultivation case. The inside of the tilling case is sealed by inserting another seal between the inner diameters of the support cylinders. Therefore, the internal structure and the shaft seal structure of the tilling case including the support tube portion are complicated, and the assembly and disassembly are not easy, so that there is a difficulty that maintenance is troublesome. There was also a problem that the lubricating oil inside the tilling case leaked out.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks, and comprises an output shaft of a main transmission mechanism and a sub-transmission mechanism rotating in an opposite direction to the output shaft. A first cultivating cylinder which is mounted laterally on a support cylinder portion of a cultivation case so that each of the output shafts and the output shaft are coaxial double shafts and each of which rotates independently, and which are juxtaposed in the axial direction of the two output shafts. And the first cultivation cylinder of the second cultivation cylinder is rotationally driven by the output shaft of the main transmission mechanism, and the second cultivation cylinder is driven in the opposite direction to the first cultivation cylinder by the power transmitted from the output shaft of the sub transmission mechanism. In a partial reverse rotary tilling device that is driven to rotate, a dust seal seals the shaft between the output shaft of the main transmission mechanism and the output shaft of the sub transmission mechanism that fits over the shaft, and outputs the output of the sub transmission mechanism. The space between the outer diameter of the shaft and the inner diameter of the support cylinder is sealed with a seal, and the output shafts of the auxiliary transmission mechanism are supported. While that extended to the outer side of the cylindrical portion,
Power is transmitted to each of the second cultivation cylinders from a portion of the output shaft of the auxiliary transmission mechanism outside the support cylinder, and the inside of the second cultivation cylinder including the power transmission portion is a cultivation case including the support cylinder portion.
It is formed in a separate room separated from the interior of the grease so as to grease the interior of the room.

[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 an opening hole with a vertical length (L)
(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 cover (3) has an intermediate rotary shaft interlocked with a main drive mechanism (4) in a tilling case (1).
A portion for bearing and supporting the shaft end of (5) is provided, and at a separate location, a support cylinder (3a) extending outward is integrally formed.

The main transmission mechanism (4) in the tilling case (1) is connected to an output shaft (6) of a horizontal axis (O1), which is provided below the tilling case (1), out of the figure. The intermediate rotary shaft (5) is higher than the output shaft (6) in transmission and is connected to the input shaft provided in the upper part of the tilling case.
It is provided in parallel with (6), and is rotated by a sprocket (7) related to the chain transmission mechanism. Incidentally, (8) is a passive sprocket fitted to the center of the output shaft (6), (9) is a chain, and (10) is a tension sprocket.

Drive gears (11) and (11) are fitted to the 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 to form left and right auxiliary transmission mechanisms (GL) and (GR).
1) (12), (11) and (12) are the above-described tilling cases (1).
Are positioned so as to fit into the opening holes (2) and (2).

A sub-transmission mechanism (GL) (GR) is provided with a second
The tilling cylinders (13) and (13) are for rotationally driving the output shaft (6) of the main transmission mechanism (4) in a direction opposite to that of the main transmission mechanism (4). Passive gear (12)
(12) is the output shaft of each sub-transmission mechanism (GL) (GR)
(12a) It is formed integrally with the inner end of (12a). The output shaft (12a) of each sub-transmission mechanism (GL) (GR)
Is a main transmission mechanism (4) via a needle bearing (14).
The output shaft (6) is rotatably fitted to the output shaft (6), and is provided in the form of a double shaft concentric with the output shaft (6) of the main transmission mechanism (4). The shaft (15) is interposed between the two output shafts (12a) and (6) to seal the fitting surfaces.

The output shafts (12a) and (12a) of the sub-transmission mechanisms (GL) and (GR) are connected to the support cylinders (3) and (3) of the lids (3) and (3) via a plane metal (16). 3a) The inner diameter of the output shaft (12a) (12a) and the inner diameter of the support cylinder (3a) (3a) at the outer end of the support cylinder (3a) (3a). The shaft is sealed between the two by a seal (17) interposed between the holes. The 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 is connected to the output shaft (1).
2a) The outer lip (17b) is fitted externally to the involute spline carved on the outer diameter part.
Is provided in contact with the inner diameter hole surface of the support cylindrical portion (3a).

Output shaft (12a) of sub-transmission mechanism (GL) (GR)
(12a) extends outward from the outer ends of the support cylinders (3a) (3a), which are parts of the tilling case (1), and an involute spline is engraved on each of the extensions. And a spur gear is mounted on each involute spline.
(18) is fitted and fixed, and the spur gear (18) is
(13) An internal gear (19) formed in (13)
The final transmissions (20) and (20) for rotating the second tilling cylinders (13) and (13) while meshing with (19) are 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 its inner end is a normal one interposed between the outer diameter of the support cylinder part (3a). Although the shaft is sealed by an oil seal (22), the outer end portion is sealed by a flexible seal (23) so as to be able to follow a change in the interval due to the inclined rotation. The bending seal (23) is interposed between the output shaft (12a) of the auxiliary transmission mechanism and the second tilling cylinder (13) as shown in the enlarged view of FIG. To the extent that the movement of the portion that bends and stretches following the change is not hindered, a flange (24) that protects the bendable portion is provided on the outside.

Further, the outer peripheral portion of the outer end of each second tilling tube (13) is formed as a spherical portion (13a) centered on the intersection (P) of the two axes (01) and (O2). Then, the collar portion (24)
A seal protection cover (25) located further outside of the above is fitted and fixed to the output shaft (6) of the main transmission mechanism, and its outer peripheral edge has at least an inner surface similar to the spherical portion (13a). It is formed into a spherical bowl-like shape, and the spherical bowl-like portion is fitted onto the spherical portion (13a) in a state where it does not contact the spherical portion (13a), and is bent by the seal protection cover (25). Seal (23)
Is doubly protected.

The second tilling tube (13) is provided with a required number of tilling nail mounting seats (26), and each tilling nail mounting seat (26) is provided.
The tilling claws (27) and (28) are attached to the fins. The first tiller (30) (30) has the seal protection cover (25) fitted on the output shaft (6) of the main transmission mechanism, and then the outer side of the output shaft (6). ) Is removably inserted and fixed with a wedge. The required number of tilling claw mounting seats (31) are distributed and mounted on the outer circumference, and a common tilling claw (32)
Is attached.

The present invention can be applied not only to a rotary tilling device for a general cultivator, a management device or a small and lightweight machine such as a tiller, but also to 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 as one that exerts the same function by changing the arrangement on both sides in the axial direction of the first cultivation cylinder.

[0016]

As described above, according to the present invention, the main transmission mechanism is provided.
The output shaft (6) of (4) and the output shaft (12a) of the auxiliary transmission mechanism (GL) (GR) rotating in the opposite direction to the output shaft (6).
(12a) and a concentric double shaft, and the bearings are horizontally mounted on the support cylinders (3a) and (3a) of the tilling case (1) so that each can rotate independently, and both output shafts (6) , (12a), a first tiller (30) (30) and a second tiller (13) juxtaposed in the axial direction of (12a).
The first tilling cylinder (30) (30) of (13) is used as the main transmission mechanism
The rotary shaft is driven by the output shaft (6) of (4), and the second tiller is
(13) (13) is connected to the output shaft (12) of the sub-transmission mechanism (GL) (GR).
a) The first cultivation cylinder (30) (3)
0), the output shaft (6) of the main transmission mechanism (4) and the output shaft (6) of the auxiliary transmission mechanism (GL) (GR) externally fitted thereto. 12a)
The shaft between the inside diameters of (12a) is sealed with a dust seal (15), and the output shafts (12a) (12a) of the auxiliary transmission mechanisms (GL) (GR).
A seal (1) is provided between the outer diameter and the inner diameter of the support cylinder (3a) (3a).
The shaft is sealed at 7) and the output shaft (12) of the sub-transmission mechanism (GL) (GR) is sealed.
a) (12a) are respectively extended to the outer side of the support cylinders (3a) (3a), while the output shafts (12a) (12a) of the sub-transmission mechanism are connected to the respective second cultivation cylinders (13) (13). ), The power is transmitted from the protruding portion outside the support cylinder, and the inside of the second tillage cylinders (13) and (13) including the power transmission portion is supported by the support cylinder portion (3a).
The tilling case (3) including (3a) is formed in a separate room separated from the inside of the tilling case (1), so that the inside of the second cultivating cylinder (13) (13) in which the power transmission portion exists is cultivated. While the grease lubrication can be performed with high durability separately from the inside of (1), even if the second cultivation cylinder (13) (13) is removed, the lubricating oil in the cultivation case (1) is not removed. No outflow and easy maintenance.

[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]

 GL Sub-transmission mechanism GR Sub-transmission mechanism 1 Tilling case 3a Support cylinder part 4 Main transmission mechanism 6 Output shaft of main transmission mechanism 12a Output shaft of sub-transmission mechanism 13 Second cultivation cylinder 15 Dust seal 17 Seal 30 First 1 tiller

Claims (2)

[Claims] An output shaft (6) of a main transmission mechanism (4) and a sub-transmission mechanism (GL) rotating in an opposite direction to the output shaft (6).
The output shafts (12a) and (12a) of the (GR) are concentric double shafts and are supported on the support cylinders (3a) and (3a) of the tilling case (1) so that each can rotate independently. And both output shafts (6), (12a)
First tillage cylinders (30) (30) juxtaposed in the axial direction of (12a)
And the first tiller (30) of the second tiller (13) (13)
(30) is driven to rotate by the output shaft (6) of the main transmission mechanism (4), and the second tilling cylinders (13) and (13) are driven by the sub transmission mechanism (GL) (G
R) in a partially reverse-rotating rotary tilling device driven by the power transmitted from the output shafts (12a) (12a) in a direction opposite to the first cultivating cylinders (30) (30). ) And a dust seal (15) between the inner diameters of the output shafts (12a) and (12a) of the auxiliary transmission mechanisms (GL) and (GR) externally fitted to the output shaft (6).
And the output shaft (1) of the auxiliary transmission mechanism (GL) (GR).
2a) (12a) The shaft between the outer diameter and the inner diameter of the support cylinder (3a) (3a) is sealed with a seal (17), and the sub-transmission mechanism (GL) (GR)
The output shafts (12a) and (12a) of the support cylinders (3a) and (3a) respectively.
Each second tilling tube (13)
In (13), the power is transmitted from the support cylinder outside protruding portion of the output shafts (12a) and (12a) of the sub-transmission mechanism, and the inside of the second cultivation cylinder (13) (13) including the power transmission portion is formed. A partial forward / reverse rotary tillage device which is formed in a separate room separated from the inside of the tillage case (1) including the support tubular portions (3a) and (3a) to lubricate the room. 2. The main power transmission mechanism comprising:
Output shaft (6) of (4) and output shaft of auxiliary transmission mechanism (GL) (GR)
(12a) Partial forward / reverse rotary tilling according to claim 1, wherein the tilling cylinder is configured to rotate around an axis (O2) inclined at a predetermined angle with respect to the axis (O1) of (12a). apparatus.