JPH09191724A - Rotary type seedling planting mechanism in rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary type seedling planting mechanism in a rice transplanter excellent in durability, capable of simply adjusting a phase and expanding an adjustment range between rows in the direction to narrow an interval between the rows by equipping one side of a sun gear with recessed parts with which the tip of clutch pawls of a sleeve body can be engaged. SOLUTION: One side of a sun gear 14 is equipped with recessed parts 25a and 25b with which the tip of clutch pawls 16a and 16b of a sleeve body 16 can be engaged. The clutch pawls 16a and 16b at the sleeve body 16 side and the clutch pawls 16a and 16b at the sun gear 14 side are constituted in such a way that both the clutch pawls 16a and 16b are engaged at a part of one phase in the circumferential direction. The clutches 16a and 16b projecting from one side of the sun gear 14 are preferably inserted into a bearing 15 engaged with a rotary case 10 so as to closely bring one side of the sun gear 14 into contact with the side of the bearing 15.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rice transplanter,
The present invention relates to a rotary type seedling planting mechanism having at least two seedling plants in one rotating case.

[0002]

2. Description of the Related Art A rotary type seedling plant used in a recent rice transplanter is disclosed in, for example, Japanese Patent Laid-Open No. 62-1340.
As described in Japanese Patent Publication No. 19 and the like, a rotary case is fixed to a drive shaft projecting in a substantially horizontal direction from a transmission case on the machine body side of a rice transplanter, and a circumference of the rotary case around the drive shaft is centered. The seedling planting shaft is rotatably supported in parallel with the drive shaft at equal parts, and the seedling planting body with the split claws is attached to each of the seedling planting shafts, while the seedling planting shaft is rotatably supported at the center of the rotating case. The sun gear is fixed to the transmission case so that it cannot rotate, and between the sun gear and each of the seedling planting shafts, non-uniform speed rotation is transmitted to each seedling planting shaft as the rotation case rotates. By providing a gear train of the above, the tip of the split claw in each seedling plant is configured to draw a movement locus of an elliptical closed loop that is long in the vertical direction.

Further, in this conventional rotary type seedling planting mechanism, the sun gear rotatably supported at the center of the rotating case is locked so as not to rotate with respect to the transmission case on the machine side. A sleeve body rotatably fitted to the drive shaft is non-rotatably fixed to the transmission case, and a clutch pawl integrally provided at the tip of the sleeve body so as to project toward the inside of the rotation case is attached to the sun gear. The clutch pawl is integrally formed on one side surface of the clutch claw so as to project toward the transmission case.

[0004]

When the sun gear is fixed to the transmission case so that it cannot rotate, the sleeve body rotatably fitted to the drive shaft is rotated relative to the transmission case as described above. If the clutch pawl at the tip of this sleeve body is engaged with the clutch pawl protruding from the side surface of the sun gear,
The mounting position for the drive shaft is moved along the axis of the drive shaft such that the rotary case is moved toward or away from the transmission case while the sun gear is held unrotatable. Because it is possible
By this mounting movement, it is possible to increase or decrease the row spacing of seedling planting.

[0005] And, when increasing or decreasing this line interval,
To increase the range of adjustment, it is necessary to increase the meshing dimension of the clutch pawls on the sleeve body and the clutch pawls on the sun gear along the axial direction of the drive shaft. In the mechanism, since the clutch pawls of the sun gear are configured to integrally project from one side surface of the sun gear as described above, the sleeve pawls of the clutch pawls are arranged along the axial direction with respect to the clutch pawls. In order to increase the meshing size of the sun gear, the projection size of the clutch pawl in the sun gear from one side of the sun gear must be increased.

However, increasing the protrusion size of the clutch pawl of the sun gear from one side of the sun gear is to narrow the striation by moving the mounting position of the rotating case to the drive shaft closer to the transmission case. In the above, since the minimum value of the line interval is regulated by the projection size of the clutch claw in the sun gear, there is a problem that the range of adjustment of the line interval cannot be widened in the direction of narrowing the line interval. It was

During assembly, when the clutch claws of the sun gear in the rotating case are engaged with the clutch claws of the sleeve body, the locus of movement of the elliptical closed loop at the tips of the split claws in each seedling plant is vertically oriented. The phase must be adjusted one by one so that it becomes longer, which is also a problem in that it requires a great deal of trouble. The first technical object of the present invention is to solve the problem that the adjustment range of the strip distance cannot be expanded in a narrow direction, and the second technical problem is to solve the phase at the time of assembly. It is to make it easy to align.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a rotary case is fixed to a drive shaft projecting in a substantially horizontal direction from a transmission case on the side of a machine body of a rice transplanter, and a circle centered on the drive shaft in the rotary case. While supporting the seedling planting axis parallel to the drive shaft in equal parts on the circumference, and mounting the seedling planting body with the split claws on each of these seedling planting shafts, it is rotatable around the center of the rotating case. Between the sun gear and each of the seedling planting shafts supported by
A gear train adapted to transmit non-uniform speed rotation to each seedling planting axis according to the rotation of the rotating case is provided, and the tip of the split claw in each seedling planting body draws a motion locus of an elliptical closed loop long in the vertical direction. Further, a sleeve body rotatably fitted on the drive shaft is fixed to the transmission case so that it cannot rotate, and the tip of the sleeve body is integrally formed so as to project toward the inside of the rotation case. A rotary type seedling planting mechanism in which the provided clutch pawl is meshed with a clutch pawl integrally provided on one side of the sun gear so as to project toward the transmission case. In order to achieve the first technical problem, a configuration is provided in which "a recess on one side of the sun gear into which the tip of the clutch pawl of the sleeve body can be fitted is provided."

Further, in order to achieve the second technical problem, "the clutch pawl on the sleeve body side and the clutch pawl on the sun gear side are located at one phase along the circumferential direction. It meshes only in. "

[0010]

As described above, by providing the one side surface of the sun gear with the recess into which the tip of the clutch pawl of the sleeve body can fit, the mounting position of the rotating case with respect to the drive shaft approaches the transmission case. Thus, the tip of the clutch pawl in the sleeve body fits into the recess provided on one side surface of the sun gear, and the tip of the clutch pawl in the sleeve body is attached to the sun gear. Since it can be brought closer to the transmission case by the amount of fitting in the recess on one side, the adjustment range of the line spacing can be widened in the direction of narrowing the line spacing.

Further, by constructing the clutch pawl on the sleeve body side and the clutch pawl on the sun gear side so that both of these clutch pawls engage with each other only at one phase position along the circumferential direction, Since the phase is automatically determined by the meshing, the phase matching at the time of assembly can be easily performed, and the number of steps required for the assembly can be significantly reduced.

Furthermore, when the sun gear is rotatably supported by the rotating case, the clutch claw protruding from one side surface of the sun gear is inserted into the bearing fitted in the rotating case, and the one side surface of the sun gear is a bearing. Since it is inserted in close contact with the side surface of the sun gear, the thickness dimension of the sun gear is set so that a gap is formed between one side surface of the sun gear and the side surface of the bearing, as disclosed in JP-A-62-134019. The durability of the sun gear can be improved because the size of the sun gear can be increased as compared with the case of opening.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the reference numeral 1 indicates
Shows a riding type rice transplanter, which has four wheels 3
The seedling planting device 4 is attached to the rear part of the traveling carbody 2 supported in the direction of the arrow so as to be movable up and down by a link mechanism 5. 2, the seedling table 6 arranged so as to incline forward, the plurality of transmission cases 7 arranged below the seedling table 6 so as to extend rearward, and the side surfaces of the respective transmission cases 7. A rotary type seedling planting mechanism 8 attached to the above and a float 9 arranged on the lower surface of each transmission case 7.

The seedling planting mechanism 8 is constructed as shown in FIGS. The seedling planting mechanism 8 includes a rotating case 10 formed into a substantially oval hollow body, and the rotating case 10 has a drive shaft 11 projecting horizontally and laterally from a side surface of the transmission case 7. The drive shaft 11 is attached so as to rotate in the direction of arrow A at an arbitrary position along the axis of the drive shaft 11.

That is, a notched flat surface 11a extending in the axial direction is provided at the tip of the drive shaft 11, while a boss portion 10a is integrally provided on the outer surface of the rotary case 10 opposite to the transmission case 7. , A tapered cotter pin 12 penetrating the boss portion 10a in a direction perpendicular to the drive shaft 11.
Is attached to the notch plane 11a of the drive shaft 11 with the nut 13 so that the rotary case 10 is fixed to the drive shaft 11 in a non-rotatable manner while the rotary case 10 is driven. The mounting position with respect to the shaft 11 is configured to be movable along the axial direction of the drive shaft 11.

When the rotary case 10 is attached to the drive shaft 11, the drive shaft 11 does not pass through the boss portion 10a provided on the outer surface of the rotary case 10 opposite to the transmission case 7, as shown in the figure. With this configuration, it is possible to reliably prevent the entry of muddy water.
A sun gear 14 is rotatably fitted to the drive shaft 11 at the center of the rotating case 10, and the sun gear 14 is transferred from one side surface 14 ′ of the sun gear 14 to the transmission case 7. A pair of clutch pawls 14 that integrally project toward each other
In a ball bearing 15 in which a and 14b are fitted in the rotating case 10, one side surface 14 'of the sun gear 14 is provided.
Is rotatably supported with respect to the rotating case 10 by being inserted into the side surface 15 ′ of the ball bearing 15 so as to be in close contact therewith. In this case, one side surface 14 ′ of the sun gear 14 projects by a minute dimension d so that each tooth of the sun gear 14 does not contact the ball bearing 15.

A sleeve body 16 fixed to the transmission case 7 in a non-rotatable manner is rotatably fitted on the drive shaft 11, and a pair of clutch claws 16a provided at the tip of the sleeve body 16. , 16b are engaged with the pair of clutch pawls 14a, 14b in the sun gear 14 in the ball bearing 15 so that the sun gear 14 does not rotate.

A hollow seedling planting shaft 17 extending in parallel with the drive shaft 11 is rotatably supported at both ends of the rotating case 10 at the same distance from the drive shaft 11. One end of the planting shaft 17 is projected from the outer surface of the rotating case 10 on the side opposite to the moving case 7, and the projecting end is provided with a seedling plant 18 having a split claw 19.
The split claw 19 in 8 is fixed in such a posture as to face the seedling table 6.

In the rotating case 10, an intermediate shaft 20 is rotatably supported at an intermediate position between the drive shaft 11 and each seedling planting shaft 17, and each intermediate shaft 20 has the sun. The first intermediate gear 21 and the second intermediate gear 22 having the same number of teeth as the gear 14 are fitted so that the first intermediate gear 21 meshes with the sun gear 14, while the seedling shafts 17 are attached to the respective seedling planting shafts 17. ,
By inserting a planetary gear 23 having the same number of teeth as the sun gear 14 so that the planetary gear 23 meshes with the second intermediate gear 22, an arrow A of the rotating case 10 is formed.
During one rotation in the direction, each seedling planting shaft 17 rotates once in the opposite direction shown by the arrow B, whereby each seedling planting body 18 attached to each seedling planting shaft 17 has its split claw 19 The seedling stand 6 is configured to turn in the vertical direction with the posture facing the direction.

In addition, the second intermediate gear 22 and the planetary gear 23 meshing with each other are non-circular gears or the like that transmit non-constant speed rotation to each seedling planting shaft 17 as the rotating case 10 rotates. By using a constant speed gear, each seedling plant 1
As shown in FIGS. 3 and 13, the tip of the split claw 19 in FIG.
To draw.

Then, on one side surface 14 'of the sun gear 14, both clutch pawls 1 of the sleeve body 16 are provided.
The recesses 25a and 25b having appropriate depth dimension S are provided so that the tips of the 6a and 16b can be fitted. In addition to this, as shown in FIG. 11 and FIG. 12, the circumferential dimension W1 in one of the two gaps between the clutch pawls 14a and 14b in the sun gear 14 is set to the circle size in the other gap. While being larger than the circumferential dimension W2, the width dimension W of one of the clutch pawls 16a and 16b of the sleeve body 16 along the circumferential direction of the clutch pawl 16a.
By making 1 ′ larger than the width dimension W2 ′ of the other clutch pawl 16b along the circumferential direction, the two clutch pawls 16a, 16b in the sleeve body and the two clutch pawls 14a, 14b in the sun gear 14 are separated. , So that they only mesh at one phase point along the circumferential direction.

In this structure, by loosening the fastening of the nut 13 to the cotter pin 12, the rotating case 10 is fixed to the transmission case 7 while the sun gear 14 at the center thereof is held unrotatable by the sleeve body 16. It can be moved along the axis of the drive shaft 11 such as approaching or separating from the transmission case 7, and by rotating the drive shaft 11 by fastening the cotter pin 12 with the nut 13 at this moving position. Since it can be fixed irreversibly, this attachment movement can increase or decrease the row spacing of seedling planting.

In this case, in the present invention, as described above, the one side surface 14 'of the sun gear 14 is provided with the recesses 25a, 25b into which the tips of the clutch pawls 16a, 16b of the sleeve body 16 can be fitted. Thus, when the mounting position of the rotating case 10 with respect to the drive shaft 11 is moved to approach the transmission case 7, the sleeve body 1
Since the tips of both clutch pawls 16a and 16b in 6 fit into the recesses 25a and 25b provided on the one side surface 14 'of the sun gear 14, the rotary case 10 is replaced with the recess 2 described above.
The depth dimension S of 5a and 25b can be brought closer to the transmission case 7.

Further, both clutch pawls 16a and 16b of the sleeve body and both clutch pawls 14a and 14b of the sun gear 14 are configured to engage with each other only at one phase position along the circumferential direction. As a result, both clutch pawls 14a, 14 of the sun gear 14 are
b, both clutch pawls 16 in the sleeve body 16
The phase is automatically determined by the engagement with a and 16b.

Furthermore, the two clutch pawls 14a, 14b protruding from one side surface 14 'of the sun gear 14 are inserted into the ball bearing 15 fitted in the rotating case 10, and the sun gear 1
Since the one side surface 14 ′ of the sun gear 14 is fitted so as to be in close contact with the side surface of the ball bearing 15, the thickness dimension of the sun gear 14 is set to the one side surface 14 ′ of the sun gear 14 and the side surface of the ball bearing 15. It can be made larger than when there is a gap between them.

[Brief description of the drawings]

FIG. 1 is a side view of a riding type rice transplanter.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG.

FIG. 8 is an enlarged sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a perspective view showing a sun gear and a sleeve body for holding the non-rotation thereof.

FIG. 10 is a cross-sectional view showing a sun gear and a sleeve body for holding the sun gear in a non-rotating state.

FIG. 11 is a sectional view taken along line XI-XI of FIG. 10;

12 is a sectional view taken along the line XII-XII in FIG.

FIG. 13 is a diagram showing a movement trajectory of a tip of a split nail in a seedling plant.

[Explanation of symbols]

 1 Riding type rice transplanter 7 Transmission case 8 Rotary type seedling mechanism 10 Rotating case 11 Drive shaft 12 Cotta pin 14 Sun gear 14 'Sun gear 14' One side 14a, 14b Clutch pawl 15 Ball bearing 15 'Side of ball bearing 16 Sleeve body 16a , 16b Clutch claw 17 Seedling planting shaft 18 Seedling planting body 19 Dividing claw 20 Intermediate shaft 21,22 Intermediate gear 23 Planetary gear 24 Motion trajectory of dividing claw tip 25a, 25b Recess

Claims (3)

[Claims] 1. A rotary case is fixed to a drive shaft projecting from the transmission case on the machine body side of the rice transplanter in a substantially horizontal direction, and seedlings are provided at equal parts on the circumference of the rotary case centered on the drive shaft. While axially supporting the planting axis in parallel with the drive shaft, each seedling planting axis is attached with a seedling plant having a split claw,
Between the sun gear rotatably supported at the center of the rotating case and each of the seedling planting shafts, there is provided a gear train that transmits non-constant rotation to each seedling planting shaft as the rotating case rotates. The tip of the split claw in each seedling plant draws a locus of an elliptical closed loop that is long in the vertical direction, and a sleeve body rotatably fitted to the drive shaft is rotated with respect to the transmission case. A clutch pawl that is fixedly fixed and integrally provided at the tip of this sleeve body so as to project toward the inside of the rotating case is integrally provided at one side of the sun gear so as to project toward the transmission case. In a rotary type seedling planting mechanism that meshes with a clutch claw, a rice planting machine characterized in that one side surface of the sun gear is provided with a recess into which the tip of the clutch claw in the sleeve body can be fitted. Low Lee Shikinae planting mechanism. 2. The "claim 1" according to claim 1, wherein the clutch pawl on the sleeve body side and the clutch pawl on the sun gear side are engaged with each other only at one phase position along the circumferential direction. A rotary type seedling planting mechanism in a rice transplanter characterized by being constructed. 3. The "claim 1" according to claim 1, wherein a clutch pawl protruding from one side surface of the sun gear is fitted in a bearing fitted in a rotating case so that one side surface of the sun gear closely contacts a side surface of the bearing. A rotary type seedling planting mechanism in a rice transplanter characterized by being inserted.