JPH0779601A - Rotary tilling device of partial reverse rotation - Google Patents

Abstract

PURPOSE:To provide the subject tilling device capable of carrying out tilling operation while properly advancing a machine body without causing dash phenomena. CONSTITUTION:A tilling shaft 6 is inserted and supported on central holes of right and left holders 3 to be fixed to a tilling case 1 and long tilling cylinders 30 are engaged and fixed to the right and the left of the tilling shaft 6. Supporting cylinder parts 3a of the holders 3 are rotatably equipped with short tilling cylinders 13 outwards and the interiors of the short tilling cylinders 13 and the tilling case 1 are independently sealed with an oil and lubricated. The short tilling cylinders 13 are rotated and driven in the opposite direction based on the long tilling cylinders 30 by power transmitted from a main transmission mechanism 4 through a final transmission part 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for rotating a long tiller and a short tiller in opposite directions to each other and driving the machine body without dash phenomenon by driving the tiller claws mounted on both tillers into the soil. The present invention relates to a rotary cultivating device (hereinafter, referred to as a partially reversing rotary cultivating device) configured so that it can be cultivated while being advanced.

[0002]

2. Description of the Related Art A conventionally known partially reversing rotary tiller has a pair of left and right long tillage tubes fitted to a tiller shaft which is inserted and supported by left and right holder portions of a tillage case. The left and right short tillers are rotatably supported on the outer diameter of the holder, and the pair of left and right long tillers are rotatably driven by the main transmission mechanism in the tillage case. Rotation in a predetermined direction, and the left and right short tillers are driven by the power transmitted to the final transmission part in the short tiller through the reversing gear train linked to the main transmission mechanism in the tillage case. It is configured to be rotationally driven in the opposite direction to the long tiller (for example, see Japanese Patent Publication No. 46-39041).

[0003]

The conventional partial reversal rotary tiller has been designed so that a long tiller and a short tiller are rotationally driven in opposite directions to each other so as to prevent the reversal of the tiller claws mounted on both tillers. Although it is possible to cultivate the aircraft by driving it into the soil without causing a dash phenomenon, there are problems described in detail below.

That is, as can be confirmed from the above-mentioned publication, in the conventional one, the inside of the tillage case accommodating the main transmission mechanism and the inside of the short length tillage tube containing the final transmission portion are connected to each other. Since both of them are commonly lubricated with oil, when the oil temperature rises and the internal pressure rises, the internal pressure is directly applied to the part that seals the outer end side of the short tiller, causing oil leakage. In some cases, the seal that seals the outer end side of the short tillage tube may be damaged, resulting in an accident. In addition, since the inside of the cultivating case and the inside of the short cultivating cylinder communicate with each other, lubrication inside the cultivating case is required for maintenance work such as replacing the seal that seals the outer end of the short cultivating cylinder. There was also the problem that even oil would leak out.

Further, in the conventional partial reversing rotary tiller, the left and right reversing gear trains for transmitting power from the main transmission mechanism to the final transmission portion in the short length tilling cylinder are more than the left and right walls of the tilling case. Since the lower part of the cultivating case was greatly bulged to the left and right due to the parallel installation on the inner side of the main transmission mechanism, the entire lateral width of the part was extremely wide, so the part directly under the wide cultivating case passed through. There was also a problem that it was extremely disadvantageous to till the soil of the country.

Further, in the conventional partial reversal rotary tiller, a short tiller arranged at the lateral side of the tillage case and a long tiller provided outside the short tiller are provided. Despite rotating in opposite directions, the seal that seals the outer end side of the short tiller was exposed to the outside, so that both long and short tiller tubes were rotated in the opposite direction. There is a problem that the seal is apt to be damaged by an external pressure of grass straw or the like which is strongly entangled in a boundary portion of the seal.

[0007]

The present invention has been made for the purpose of solving the problems described in the prior art, and the following technical means are taken to achieve the object. First, the tiller shaft 6 is pierced through the center holes of the left and right holders 3, 3 fixed to the tiller case 1, and the tiller shaft 6 is supported.
The long cultivating cylinders 30 and 30 are fitted and fixed to the left and right extending portions of the holder 3, and the short cultivating cylinders 13 and 13 are rotatably fitted to the supporting cylinders 3a and 3a of the holders 3 and 3, respectively. The power transmitted from the main transmission mechanism 4 in the cultivating case 1 to the tilling shaft 6 rotationally drives the long tillage tubes 30, 30 in a predetermined direction, and the main transmission mechanism 4 drives the final transmission portions 20, 20. With the power transmitted through the short cultivator 13, 13, the long cultivator 30,
In the partial reverse rotary cultivator configured to be rotationally driven in the opposite direction to 30, the final transmission unit 2
The insides of the short tillage tubes 13 and 13 accommodating 0 and 20 are separated from the inside of the tillage case 1, and the insides of the short tillage tubes 13 and 13 and the tillage case 1 are independently oil-sealed. It is a partially reversing rotary tiller that is lubricated.

Then, the inside of each of the short length tillers 13, 13 and the inside of the tillage case 1 are transferred from the main transmission mechanism 4 in the tillage case 1 to the final transmission portion 20 in the short tillers 13, 13. Two
Passive gears 12, 1 of reverse gear trains GL, GR transmitted to 0
The two bosses 12a, 12a can be separated from each other by the seals 17, 17 interposed between the outer peripheries and the inner peripheral surfaces of the holders 3, 3. In addition, the main transmission mechanism 4 in the cultivating case 1
The reverse rotation gear trains GL and GR transmitted from the short length tillers 13 and 13 to the final transmission portions 20 and 20 in the tillers 13 and 13 are fitted into the openings 2 and 2 provided on the left and right wall portions of the tillage case 1. It is preferably provided. Furthermore, the short length tilling cylinder 13 is a horizontal tilling shaft 6
Generally, the tilted cultivating cylinder is rotated around an axis O2 tilted at a constant angle with respect to the axis O1. However, in some cases, the bearing is pivotally supported parallel to the cultivating axis 6. It may be provided.

Next, the device of the present invention cultivates the short cultivating cylinders 13 and 13 rotatably fitted on the supporting cylinders 3a of the left and right holders 3 and 3 fixed to the cultivating case 1. Axis 6
In a partially reversing rotary tiller, which is a tilted tiller that rotates around an axis O2 that is tilted at a constant angle with respect to the center O1, the outer ends of the tilted short tillers 13 and 13 are sealed. Partial reversal rotary tillage, in which the outer side of the flexible seals 25, 25 is provided with seal protecting covers 25, 25 which rotate together with the tiller shaft 6 rotating in the opposite direction to the short length tillers 13, 13. The device. The peripheral edges of the seal protection covers 25, 25 are the axial center O1,
It is preferable that the short tillage tubes 13, 13 formed on the spherical portions 13a, 13a centered on the intersection point P of O2 are fitted and polymerized in a non-contact state on the outer peripheral portions of the outer ends of the short tillage tubes 13, 13.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The drawings are specific examples of a center-drive type partially reversing rotary tilling device in which a short tiller is an inclined tiller. FIG. 1 is a sectional view of an essential part of a partially reversing rotary tilling apparatus according to the present invention, FIG. 2 is an enlarged sectional view of a portion thereof, and FIG. 3 is an enlarged portion of a seal for internal separation. FIG. 4 is a side view showing an arrangement example of the tilling claws attached to the short length tilling tube, and FIG. 5 is a front schematic view showing the tilling claws provided with the rebound blades attached to the short tilling tube.

In FIG. 1 and FIG. 2, a cultivating case 1
Is an opening 2 having a length L in the up-down direction on the left and right walls below it.
2 is opened, and the outside of each opening 2, 2 is closed by holders 3, 3 that are fastened and attached to the peripheral edge of the opening. Each holder 3 is provided with a portion for bearing-supporting the shaft end portion of the intermediate rotary shaft 5 that interlocks with the main transmission mechanism 4 in the cultivating case 1, and, in a separate place, outside. A support cylinder portion 3a extending toward one side is integrally formed.

The main transmission mechanism 4 in the cultivating case 1 includes a cultivating shaft 6 having a horizontal axis O1 which is laterally provided below the cultivating case 1.
It is configured in a chain transmission mechanism that is interlockingly connected to an input shaft provided at the upper part of the cultivating case (not shown), and the intermediate rotary shaft 5 is provided in a transmission higher position than the cultivating shaft 6 and is provided parallel to the cultivating shaft 6. It is adapted to be rotationally driven by a sprocket 7 engaged with the chain transmission mechanism. In addition, 8 is a passive sprocket fitted in the central part of the tillage axis, 9 is a chain, 1
0 is a tension sprocket.

Drive gears 11, 11 are fitted to the left and right sides of the sprocket 7 of the intermediate rotary shaft 5, and the passive gears are rotatably fitted on the cultivating shaft 6 to the respective drive gears 11, 11. The gears 12 and 12 are always meshed with each other to form left and right reverse rotation gear trains GL and GR, and the respective reverse rotation gear trains GL and GR are provided in the opening portions 2 and 2 of the plowing case 1 described above. It is located in a tight fit.

The reverse rotation gear trains GL and GR are for driving the short length tillers 13 and 13 described later to rotate in the opposite direction with respect to the tillage shaft 6, and the passive gears in the respective reverse rotation gear trains GL and GR. The gear 12 is integrally provided with a boss portion 12 a that extends long from the gear portion to the outside.
2a is rotatably fitted on and supported by the cultivating shaft 6 via a needle bearing 14, and the outside of the needle bearing 14 is axially sealed with a dust seal 15.

Further, the outer diameter portion of the boss portion 12a of the passive gear 12 is fitted into the inner diameter hole of the holder 3 through the plane metal 16, and the outer periphery of the boss portion of the passive gear 12 at the outer end portion of the holder 3. A seal 17 is interposed between the and. The seal 17 is made of an elastic material such as oil resistant rubber and is formed in the involute spline hole.
7a is fitted to an involute spline portion engraved on the outer diameter portion of the boss portion 12a, and an outer peripheral lip portion 17b is provided so as to abut the inner peripheral surface of the holder 3. There is.

A spur gear 18 is fitted and fixed to an involute spline portion of the boss portion 12a outside the seal 17, and the spur gear 18 is formed on the short length tilling tube 13. The final transmission unit 2 that meshes with the internal gear 19 that is rotating to drive the short length tiller 13 to rotate.
0 is configured.

The short tiller 13 is rotatable via a bearing 21 on the boss outer diameter of the holder 3 so as to rotate around an axis O2 inclined at a constant angle with respect to the axis O1 of the tiller shaft 6. The inner end portion is axially sealed by a normal oil seal 22 which is interposed between the inner end portion and the outer diameter of the boss portion of the holder 3, but the outer end portion is tilted and rotated. It is shaft-sealed by a flexible seal 23 so that it can follow the change in the distance. As shown in the enlarged view of FIG. 2, the bending seal 23 is interposed between the boss portion 12a of the passive gear and the short tillage tube 13 and bends and stretches following the change in the distance between the two. The collar portion 24 is attached to the outside so as to protect the bent and stretched portions within the range that does not hinder the movement of the.

Further, the outer peripheral portion of the outer end of the short tillage tube 13 is
Spherical part 1 centered on the intersection point P of the two axial centers O1 and O2
3a on the other hand, a seal protection cover 25 located further outside of the collar portion 24 is fitted and fixed to the cultivating shaft 6, and the outer peripheral edge portion of at least the inner surface thereof is the spherical portion 13a. Is formed in the shape of a bowl having a spherical surface similar to that of the above, and the bowl-shaped portion of this spherical surface is capped with the spherical portion 13a in a state not in contact with the spherical portion 13a, and is bent by a seal protection cover 25. -Double protection of Le 23.

In this way, the short number of tilling cylinders 13 are provided with the required number of tilling claw mounting seats 26, and the tilling claws are mounted at each of the tilling claw mounting seats 26.
As shown in FIG. 4, four plowing pawl mounting seats 26 ... With different phases in the rotation direction R are provided, and two of them are general plowing pawls having a rotation diameter D1. 27 is attached. A straight blade 28 having a diameter D2 larger than the rotation diameter of the tilling claw 27 is attached to the other one of the tilling claw mounting seats, and the straight blade is used to vertically cut the soil to cultivate the soil. In order to reduce the required power, further, the other plowing pawl mounting seat is provided with the plowing pawl 29 with the sprocket wing 29a having a diameter D2 smaller than the rotation diameter of the plowing pawl 27, and the plowing pawl 29 is attached. It is configured so that the soil and grasses to be accumulated between the side surface of the cultivating case 1 and the side surface of the cultivating case 1 are splashed and eliminated by the splashing action of 29.

Reference numerals 30 and 30 denote long cultivating cylinders. Each of the long cultivating cylinders 30 is fitted with the seal protecting cover 25, and is detachably inserted from the outside to the cultivating shaft 6. A fixed number of plowing claw mounting seats 31 are distributed and mounted on the outer periphery, and a general plowing claw 32 is mounted on each mounting seat.

The present invention can be applied not only to a general tiller, but also to a rotary tiller for a small-sized lightweight machine such as a management machine or a tiller, as well as a rotary tiller for a riding tractor. The present invention is not limited to the center-drive type rotary cultivator, and even a side-drive type rotary cultivator can be used for a short length tiller. The same function can be applied only by changing the arrangement at both ends of the long tiller.

[0022]

In the device of the present invention constructed as described above, the main transmission mechanism 4 and the left and right reverse gear trains GL, G are arranged.
Inside the tillage case 1 for accommodating R, and the final transmission section 20,
The inside of the short tillage tubes 13, 13 in which 20 is accommodated is
Because it is separated into separate rooms by the rule 17, 17
While the inside of the soot 1 is filled with lubricating oil to be oil-lubricated, the inside of the left and right short tillage tubes 13 and 13 can be separately lubricated by grease. Therefore, at the time of maintenance such as detachment of the short cultivating cylinder 13 and replacement of the seal for axially sealing the outer end side of the short cultivating cylinder 13, even if they are removed, the lubricating oil does not flow out. It is easy and economical because there is no loss of lubricating oil outflow. Even if the internal pressure rises due to the rise of the oil temperature inside the cultivating case 1, the internal pressure load may reach the seal part that seals the outer end sides of the short cultivating cylinders 13, 13. Since it did not exist, oil leakage and seal damage did not occur and the durability was good.

In addition, from the main transmission mechanism 4 to the short length tiller 13,
Left and right reverse gear trains GL and GR for transmitting power to the final transmission portions 20 and 20 in 13 are provided so as to be fitted into the opening portions 2 and 2 provided in the left and right wall portions of the tillage case 1. Therefore, the degree of swelling to the left and right of the lower part of the plowing case is small, which is advantageous for plowing the soil directly below the plowing case without residual plowing.

Further, on the outside of the flexible seal 23 for sealing the outer end portion of the short cultivating cylinder 13, there is a seal protection cover 25 which rotates together with the cultivating shaft 6 which rotates in the opposite direction to the short cultivating cylinder 13. Since it has been installed, short tillage tube 13 and long tillage tube 3
Even if grass straw or the like is twisted around the boundary portion of both tillage tubs due to the anti-rotation of 0, it is safe because the flexible seal is not damaged. And short length tiller 1
3, the outer peripheral portion of the outer end of the seal protective cover 25 is formed into a spherical portion 13a having an intersection point P of the two axial centers O1 and O2 as its center. 13a is formed into a spherical bowl shape similar to that of 13a, and when the spherical bowl edge portion is capped with the spherical edge portion 13a in a state not in contact with the spherical edge portion 13a, the seal protecting cover is formed. 25, the protection effect is further improved, and at the time of operation, the outer peripheral edge of the short seal protection cover 25 does not come into contact with the outer peripheral portion of the outer end of the tiller 13, so there is no power loss due to sliding contact between the two. And operates lightly.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a partially reversing rotary cultivator according to the present invention.

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

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

FIG. 4 is a side view showing an example of arrangement of tilling claws mounted on a short length tilling cylinder.

FIG. 5 is a schematic front view showing a cultivating claw provided with a repelling wing attached to a short length cultivating cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cultivation case 2 Opening holes formed on the left and right walls of the cultivating case 3 Holder 3a Holder support cylinder 4 Main transmission mechanism 5 Intermediate rotary shaft 6 Tillage shaft GL Left-handed reverse gear train GR Right-handed reverse gear train 11 Drive Gear 12 Passive Gear 13 Short Tiller 13a Spherical Part 17 Seal 20 Final Transmission 25 Seal Protective Cover 30 Long Tiller

Claims (6)

[Claims] 1. Right and left holders fixed to a cultivating case (1)
(3) The tiller shaft (6) is pierced and supported in the central hole of (3), and the tiller shaft is supported.
The long tillage tubes (30) and (30) are fitted and fixed to the left and right extending portions of (6), and the supporting cylinder portions (3a) (3) of the holders (3) and (3) are fixed.
A short cultivating cylinder (13) (13) is rotatably fitted to the outside of (a) so that the main power transmission mechanism (4) in the cultivating case (6) moves from the cultivating shaft.
With the power transmitted to (6), long tillers (30) (30)
Is driven to rotate in a predetermined direction, and with the power transmitted from the main transmission mechanism (4) through the final transmission parts (20) (20), the short tillage tubes (13) and (13) are moved to the long tillage tubes (30). ) (30), in a partially reversing rotary tiller configured to rotate in the opposite direction, the short tiller tubes (13) (13) in which the final transmission parts (20) (20) are housed Cultivating case inside
Separated from the inside of (1), short tillage tube (13)
(13) A partially reversing rotary tilling device characterized in that the inside of the cultivating case (1) is independently oil-sealed and lubricated. 2. The main transmission mechanism (4) inside the tillage case (1) to the final transmission section (20) (20) inside the short length tiller (13) (13).
The left and right drive gears (11) and (11) fitted to the intermediate rotation shaft (5), which is higher in transmission than the cultivating shaft (6), inside the cultivating case (1). , The left and right reverse gear trains (GL) (GR) composed of the passive gears (12) and (12) that constantly mesh with the respective drive gears (11) and (11), and the reverse gear trains (GL) (GR) The passive gears (12) and (12) of the above are rotatably externally supported by the cultivating shaft (6), and the outer periphery of the boss portion (12a) of each passive gear (12) and the inner peripheral surface of the holder (3). A seal (17) is interposed between the seal and the seal (17), and a short tiller is used.
2. The partially reversing rotary tilling device according to claim 1, wherein the inside of the (13) and the inside of the tillage case (1) are separated. 3. The main transmission mechanism (4) inside the tillage case (1) to the final transmission section (20) (20) inside the short length tiller (13) (13).
The left and right drive gears (11) and (11) fitted to the intermediate rotation shaft (5), which is higher in power transmission than the cultivating shaft (6), inside the cultivating case (1). , The left and right reversing gear trains (GL) (GR) composed of the passive gears (12) and (12) that constantly mesh with the respective driving gears (11) and (11), and the respective reversing gear trains (GL) (GR) ), The left and right reversing gear trains (GL) (GR) are cultivated in the partially reversing rotary cultivator in which the passive gears (12) and (12) are rotatably fitted on the cultivating shaft (6). 3. The partially reversing rotary tilling device according to claim 2, wherein the opening is provided in the left and right wall portions of the soot (1) so as to be fitted into the openings (2) and (2). 4. Left and right holders fixed to the cultivating case (1)
(3) A short tillage tube (13) (13) rotatably fitted to the support tube portion (3a) (3a) of (3) is attached to the axis (O1) of the horizontal tillage shaft (6). The partially reversing rotary tiller according to claim 1, 2 or 3, which is formed on an inclined tiller that rotates around an axis (O2) inclined at a constant angle. 5. Right and left holders fixed to the cultivating case (1)
(3) The short tillage tubes (13) and (13), which are rotatably fitted to the support cylinder portions (3a) and (3a) of the (3), are attached to the shaft center (O) of the tiller shaft (6).
1) In a partially reversing rotary tiller, which is an inclined tiller that rotates around an axis (O2) inclined at a constant angle with respect to 1), the outer ends of the short tillers (13) and (13) are sealed. At the outer side of the flexible seals (23) (23), the short tiller (1
3) A partially reversing rotary tiller according to claim 4, further comprising a seal protection cover (25) which rotates together with the tiller shaft (6) rotating in the opposite direction with respect to (13). 6. Left and right holders fixed to the cultivating case (1)
(3) The short tillage tubes (13) and (13), which are rotatably fitted to the support cylinder portions (3a) and (3a) of the (3), are attached to the shaft center (O) of the tiller shaft (6).
1) A tilted tiller that rotates around an axis (O2) that is tilted at a constant angle with respect to 1), and each short tiller (13) (13)
At the outer side of the flexible seal (25) (25) that seals the outer end portion of the seal, the seal that rotates together with the tiller shaft (6) that rotates in the opposite direction to the short length tillers (13) (13). Protective cover (25)
In the partial reversal rotary cultivator provided with the above, the outer peripheral portion of the outer end of each short cultivating cylinder (13) is connected to the both axial centers (O1) (0).
2) is formed in a spherical portion (13a) centering on the intersection point (P), and the peripheral portion of the seal protection cover (25) is placed outside the spherical portion (13a) in a non-contact state. The partially reversing rotary tiller according to claim 5, wherein the parts are overlapped and polymerized.