JP4496706B2 - Seedling planting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seedling planting apparatus provided in a seedling transplanting machine such as a rice transplanter.
[0002]
[Prior art]
A rotary seedling planting device in which a seedling planting tool is provided in a rotary case that rotates around a planting drive shaft in the left-right direction and the seedling planting tool moves on a circular path, for example, As described in Patent Document 1, one seedling planting tool (transplanting tool) 30 is generally provided in one rotary case (rotating case) 21 for one line. This is because the seedling planting tool 30 cannot be provided on both the left and right sides of the rotary case 21 because the planting transmission case 12 that is transmitted to the planting drive shaft (rotating shaft) 22 is provided near the side of the rotary case. It is.
[0003]
[Patent Document 1]
Japanese Examined Patent Publication No. 7-112381 [0004]
As a special example, as shown in Patent Document 2, two rotary cases 21, 21 provided in parallel in the left-right direction, or the rotary case 21 and the rotating body 65 are connected by a left-right axis 51, and this axis 51 There is a configuration in which the seedling planting tool 22 is attached. With this configuration, it is possible to operate two or more seedling planting tools with one rotary case.
[0005]
[Patent Document 2]
Japanese Utility Model Publication No. 62-91926 [0006]
[Problems to be solved by the invention]
In the case of the configuration typified by Patent Document 1, the same number of rotary cases as the number of planting strips are required, so there is a problem that the number of parts is large and the cost is high. On the other hand, the configuration of Patent Document 2 can solve the above problems because two or more seedling planting tools can be provided per rotary case, but the shaft 51 to which the seedling planting tool is attached is likely to be twisted and bent, It is envisaged that damage and planting accuracy will be reduced. Accordingly, the present invention provides a seedling planting apparatus that can operate two seedling planting tools with one rotary case and that can be operated accurately without applying excessive force to the operating mechanism. Is an issue.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration. That is, the seedling planting apparatus according to claim 1 is configured such that a rotating body (21) rotating around a rotation center line in the left-right direction can rotate a final axis (25 ) in the left-right direction eccentric to the rotation center axis. provided, is attached seedling planting device (26) integrally from the rotating body (21) to the protrusion protruding to the left and right at the end axis (25), a final gear that rotates integrally with the final shaft (25) (39) Is transmitted through a gear train provided on the rotating body (21), and the gear train rotates on a rotating gear (rotating while moving on a circular orbit centered on the rotational center line (24) of the rotating body). 35), a fixed gear (40) that meshes with the rotating gear to determine the path of the rotating gear is an internal gear, and a final shaft (25) is provided inside the fixed gear . .
[0008]
The seedling planting tool moves in a circular orbit by rotating the rotating body around the rotation center line. At that time, the final shaft to which the seedling planting tool is attached is transmitted via the gear train, so that the posture of the seedling planting tool is appropriately changed to maintain the appropriate posture according to the moving position on the circular orbit. To do. By providing the gear train on the rotating body, it is possible to project the final shaft from the rotating body to the left and right sides, and to provide seedling planting tools on both the left and right projecting portions.
[0011]
In addition to the contents of claim 1, the seedling planting device according to claim 2 is arranged such that the rotating body (21) and the fixed gear (40) do not overlap in a side view.
[0015]
In the seedling planting apparatus according to claim 3, in addition to the contents of claim 1 or 2, the fixed gear (40) is prevented from rotating by a fixed support that rotatably supports the rotating body (21) from the outside. The configuration. In addition to the contents of claims 1 to 3, the seedling planting device according to claim 4 comprises the rotating body (21) with left and right divided bodies (21L, 21R) and a rotating body (21). The drive gear (30) is provided, and the drive gear (30) is fixed to the rotating body (21) by a coupling member (69) that couples the left and right divided bodies (21L, 21R) and the drive gear (30) together. . Further seedling planting device according to claim 5, in addition to the contents of the claims 1 to 4, wherein the gear train includes an intermediate gear (36) which rotates integrally with the rotary gear, the first meshing with the intermediate gear A counter gear (37) and a second counter gear (38) that rotates integrally with the first counter gear and meshes with the final gear, and includes a first counter gear, a second counter gear, a final gear (39), and a final shaft. A plurality of combinations of (25) are provided, and a plurality of seedling planting tools (26) are provided on the circumference centered on the rotation center line of the rotating body. The first counter gear or the second counter gear of another set is arranged so as not to overlap with the rotation center shaft of the two counter gears in a side view, and the rotation counter shafts of two different sets of the first counter gear and the second counter gear are arranged. The first counter gear or the mutual distance It is smaller than twice the diameter of the second counter gear.
[0016]
【The invention's effect】
Since the seedling planting tool can be provided on both the left and right sides of the rotating body with the structure of claims 1 to 5 , one rotating body can be used in combination with multiple strips (usually two strips), and the entire seedling planting device is lightweight. The cost can be reduced and the gears in the gear train can be arranged without shifting to the left and right so that the transmission to the seedling planting tool is stabilized and the planting accuracy is improved.
[0017]
By adopting the configuration of claims 2 to 5 , the configuration of claim 1 can be realized with a relatively simple gear train configuration. In detail, if it is set as the structure of Claim 5 , a gear train can be provided in a rotary body reasonably.
[0018]
Particularly, in the case of claim 2 , the fixed gear does not get in the way when the rotating body is attached and detached, and the seedling planting device can be easily assembled. Furthermore, in the case of claim 3 , there is an effect that the fixed gear can be reliably prevented from rotating while having a simple structure.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 represents the riding rice transplanter equipped with the seedling planting apparatus of this invention. This riding rice transplanter 1 is equipped with six-row planting via a lifting link device 6 behind a traveling vehicle body 5 having a pair of left and right front wheels 3 and 3 and rear wheels 4 and 4 that are mounted and driven by an engine 2. The seedling planting part 7 is connected. In the figure, reference numeral 8 is a control seat, 9 is a steering handle for steering the front wheels 3 and 3, and 10 is a spare seedling stage on which spare seedlings are placed.
[0020]
The seedling planting section 7 is provided with a seedling mount 13 that is inclined so that the front portion is higher on the upper side of the transmission case 12 that is input from the traveling vehicle body 5, and the planting transmission sections 12 a of the transmission case 12. A set of seedling planting devices 14,... Is provided for every two strips at the rear end. When the aircraft is advanced with the floats 15 in contact with the ground, the seedling stage 13 reciprocates left and right, and the mat seedlings on the stage are sequentially transferred to the seedling outlet 16 on the lower end side of the seedling stage. Then, the seedling planting device 14,...
[0021]
The seedling planting device 14 has a configuration shown in FIGS. A fixed support body 20 having an annular shape when viewed from the side is integrally provided at the rear end of the planting transmission portion 12a, and a rotary case 21 as a rotating body composed of left and right divided bodies 21L and 21R is provided inside through a bearing 22 and a bush 23. And are pivotably fitted. The rotary case 21 is provided with two final shafts 25 and 25 so as to be rotatable at a phase of 180 degrees with respect to each other on a circumference centered on the rotation center line 24. Seedling planting tools 26 and 26 are integrally attached to the left and right ends protruding from the case 21.
[0022]
Between the left and right divided bodies 21L and 21R of the rotary case 21, a drive gear 30 for driving the case is provided. The drive gear 30 meshes with a transmission gear 33 attached to a shaft 32 that is transmitted via a chain 31 in the planting transmission portion 12a, and rotates in a constant direction at a constant speed.
[0023]
In addition, a gear train for transmission to the final shafts 25 and 25 is provided in the rotary case 21. The gear train includes a rotating gear 35 that rotates while moving on a circular orbit about the rotation center line 24 of the rotary case 21, an intermediate gear 36 that rotates integrally with the rotating gear, and a first gear that meshes with the intermediate gear. The counter gears 37 and 37, the second counter gears 38 and 38 that rotate integrally with the first counter gear, and the final gears 39 and 39 that are attached to the final shafts 25 and 25 and mesh with the second counter gear. . Two combinations of the first counter gear 37, the second counter gear 38, and the final gear 39 are provided, and the rotation of the intermediate gear 36 is branched into two systems and transmitted to the two final shafts 25, respectively. The rotating gear 35 meshes with an internal fixed gear 40 fixed to the fixed support body 20, and operates in conjunction with the rotation of the rotary case 21.
[0024]
When the drive gear 30 rotates, the rotary case 21 integrated therewith also rotates, and the pair of seedling planting tools 26, 26 move in a circular path. At that time, the operation of the rotating gear 35 interlocked with the rotation of the rotary case 21 is transmitted to the final shafts 25 and 25 via the gear train, and the postures of the seedling planting tools 26 and 26 are changed. Since the second counter gear 38 and the final gear 39 are non-circular gears, the posture change of the seedling planting tool 26 is moderate. As a result, the seedling planting tool 26 changes its posture as shown in FIGS. This can be summarized in one figure as shown in FIG. The seedling planting tool 26 operates so that the tip of the seedling separation claw 47, which will be described later, draws a locus P while sequentially changing the posture. The moving speed of the seedling separation claw 47 is slow near the seedling extraction position A and the seedling planting position B, and between the positions A and B is fast. The tip movement locus P ′ of the seedling separation claw 47 in consideration of the movement of the machine body is as shown in FIG.
[0025]
Further, inside the rotary case 21, a braking cam 42 attached so as to rotate integrally with the final shaft 25, a braking arm 43 contacting the outer peripheral surface of the braking cam, and a spring pressing the braking arm against the braking cam 42 44, two sets of phase shift prevention mechanisms are provided. This phase shift prevention mechanism brakes the rotation of the final gear 39 when the seedling planting tool 26 is at the seedling extraction position A and the seedling planting position B, absorbs backlash between the gears, and separates seedling separation described later. In addition, the operation of the seedling planting is performed accurately. The spring 44 is shared by two sets of phase shift prevention mechanisms.
[0026]
The seedling planting tool 26 is attached to the final shaft 25 by a cotter pin 46 so as to operate integrally. The seedling planting tool 26 is provided with a bifurcated fork-shaped seedling separation claw 47 having a sharp tip and a seedling extruding body 48 that projects and retracts below the seedling separation claw. .
[0027]
The operation mechanism of the seedling extrudate 48 is as follows. That is, the cam arm 52 pivotally supported by the arm shaft 51 is in sliding contact with the outer peripheral surface of the push cam 50 that is rotatably fitted to the final shaft 25. Further, an extrusion restricting arm 53 that rotates integrally with the cam arm 52 is pivotally supported on the arm shaft 51, and the end of the extrusion restricting arm and the end of the extrusion rod 54 that supports the seedling extrudate 48 are jointed. It is connected via a member 55. The joint member 55 is urged by a push spring 56 toward the side from which the push rod 54 projects.
[0028]
When the final shaft 25 rotates, the push cam 50 rotates relative to the shaft, and the push restricting arm 53 swings by the action of the cam mechanism composed of the push cam 50 and the cam arm 52. When the push-out restricting arm 53 is at a position where the push-out spring 56 is compressed, the seedling extrudate 48 is in a retracted state. When the push-out restricting arm 53 rotates from the position and the compression of the push-out spring 56 is relaxed, the push-out rod 54 is pushed out by the elastic force of the push-out spring 56, and the seedling pusher 48 protrudes.
[0029]
When working on the riding rice transplanter 1, as described above, the pair of seedling planting tools 26, 26 move along the same trajectory while maintaining a half cycle interval while drawing the tip trajectory P. At the seedling extraction position A, the seedling separation claw 47 divides and extracts the seedlings at the seedling extraction outlet 16 into one stock. At this time, the seedling extrudate 48 is in a retracted state. When the seedling planting tool 26 moves down and moves to the seedling planting position B, the seedling extruding body 48 protrudes, and the seedling is separated from the seedling by pushing downward the soil portion of the seedling held by the seedling separation claw 47. Push out from the nail 47 and plant in the field. After that, the seedling planting tool 26 moves upward through a trajectory rearward than when the seedling planting tool 26 moves downward, and the seedling extrudate 48 moves backward. The movement speed of the tip of the seedling separation claw 47 is slow in the vicinity of the seedling extraction position A and the seedling planting position B, and the speed between both positions A and B is high, so that the accuracy of seedling extraction and planting is high and high-speed planting is achieved. It is possible.
[0030]
As described above, the seedling planting device 14 is provided with the seedling planting tools 26 on the left and right sides of the rotary case (rotating body) 21 that is rotatably supported by the fixed support 20 from the outside. At the same time, it is configured to plant seedlings in two rows. In order to make this configuration possible and to improve functionality and reduce costs, the seedling planting apparatus has the following characteristic structure.
[0031]
First, the rotary case 21 which is a rotating body is divided into left and right divided bodies 21L and 21R, and a drive gear 30 is sandwiched and fixed therebetween. As a result, transmission from the outside of the rotary case 21 to the drive gear 30 is made possible, and the drive gear 30 is hardly deformed. The outer diameter of the drive gear 30 is smaller than the inner diameter of the fixed support 20 so that the drive gear 30 does not overlap the fixed support 20 in a side view. Thereby, the rotary case 21 can be easily detached from the fixed support 20 together with the drive gear 30.
[0032]
The outer diameter of the drive gear 30 is larger than the circumference where the final shafts 25 and 25 are arranged, and the final shafts 25 and 25 are provided through the drive gear 30. For this reason, the intermediate portions of the final shafts 25 and 25 are supported by the drive gear 30, which is effective for preventing the final shafts 25 and 25 from being bent.
[0033]
The gear train transmitted to the final shafts 25, 25 has a rotation gear 35 on one of the left and right (right side in the illustrated example) of the drive gear 30 located at the left and right center of the rotary case 21, and an intermediate gear 36 on the opposite side and a first counter. Gears 37, 37, second counter gears 38, 38, and final gears 39, 39 are arranged. The drive gear 30 has an opening at the center thereof, and an intermediate shaft 60 having a rotation gear 35 and an intermediate gear 36 attached thereto is inserted through the opening 30a. In this way, the right and left balance is improved by arranging the gears of the gear train so as to be distributed to the left and right.
[0034]
The intermediate shaft 60 is located at a distance from the two counter shafts 61 and 61 to which the first and second counter gears 37 and 38 are respectively attached, and the two counter shafts 61 and 61 are viewed in a side view. It is placed at a position off the connecting straight line. Further, the distance D between the two counter shafts is set to be smaller than twice the diameter of the first counter gear 37 or the second counter gear 38. As a result, the gear train can be made relatively simple and compact. The entire gear train is arranged so as not to overlap with the final shafts 25 and 25.
[0035]
When stopping the seedling planting device 14, the pair of seedling planting tools 26, 26 are stopped at the same height by a fixed position clutch (not shown). At this time, the two counter shafts 61, 61 are stopped. Are stopped at the same height, and the intermediate shaft 60 is positioned therebetween. For this reason, the front-rear weight balance when the seedling planting apparatus is stopped is good, and the stop position is stable. When the intermediate shaft 60 stops below the straight line connecting the two counter shafts 61, 61, the intermediate gear 36 is immersed in the lubricating oil in the rotary case 21, so that the next planting is started. There is also an effect that the operation at the time is smooth.
[0036]
The fixed gear 40 that meshes with the rotation gear 35 and determines the path of the rotation gear is an internal gear, and is fixedly attached to the fixed support 20. The fixing is performed in such a manner that the convex portions 40a formed on the outer periphery of the fixed gear 40 are engaged with the concave portions formed on the fixed support 20, and the fixed gear 40 is prevented from rotating around the fixed support 20. It is fixed. This mounting method has an advantage that it can be reliably prevented from rotating, and a structure such as a bolt is not required and the structure is simple. The fixed gear 40 may be integrated with the rotary case 21.
[0037]
The fixed gear 40 is arranged outside the final shafts 25 and 25 so as not to overlap the rotary case 21 in a side view. Further, the final gears 25 and 25 do not overlap the fixed support 20 in a side view. For this reason, when the rotary case 21 is attached and detached, the fixed gear 40 and the final gears 25 and 25 do not get in the way.
[0038]
The left and right divided bodies 21L and 21R of the rotary case are connected to each other at four locations by fastening bolts 65. As shown in FIG. 5, the final shafts 25, 25 can be stably supported by disposing the tightening bolts 65 in the vicinity of both sides sandwiching the final shafts 25, 25. Two of these four tightening bolts are inserted from the left divided body 21L side, and the remaining two are inserted from the right divided body 21R side. Since the left and right divided bodies 21L and 21R are shared by the same parts, the insertion direction of the tightening bolt 65 is divided into left and right as described above.
[0039]
The drive gear 30 is fixed at two locations that form a phase of 90 degrees with the final shaft 25. The fixed portion on the side where the rotating gear 35 is located is such that the male threaded portion 66a of the first coupling member 66 having the male threaded portion 66a and the female threaded portion 66b formed at both ends is fixed to the left divided body 21L with a nut 67 and The drive gear 30 is fixed to the female thread portion 66 b of the one coupling member 66 with a bolt 68. The fixed part on the opposite side is a cylindrical body in which one male screw portion 69a of a second coupling member 69 having male screw portions 69a and 69b formed at both ends is screwed to the left divided body 21L and is externally fitted to the male screw side. The drive gear 30 is fixed between the step 70 and the step portion 69c of the second coupling member, and the other male screw portion 69b is fixed to the right divided body 21R with a nut 67.
[0040]
The intermediate shaft 60 is formed with male screw portions 60a and 60b at both ends. One male screw portion 60a is screwed to the female screw portion 71 of the left divided body 21L, and the other male screw portion 60b is connected to the right divided body 21R. It is inserted into the through hole 72 and screwed to the protruding portion with a nut 67. That is, the intermediate shaft 60 also serves as a coupling member that couples the left and right divided bodies 21L and 21R. As described above, the coupling member (second coupling member) 69 that couples the two divided bodies 21L and 21R and the drive gear 30 together is provided on one side of the rotary case 21 with the rotation center line 24 interposed therebetween, and on the opposite side. An intermediate shaft 60 that also serves as a coupling member for both the left and right divided bodies 21L and 21R is provided. A plug 73 is attached to the through hole 72 of the left divided body 21L to which the intermediate shaft 60 is not attached.
[0041]
The counter shaft 61 is screwed to the left divided body 21L at the left end portion, and the drive gear 30 is fixed to the right end portion. If the drive gear 30 and the counter gears 37 and 38 are attached to one of the left and right divided bodies in this way, the rotary case 21 can be easily divided into left and right.
[0042]
The characteristic structure mentioned above is about the rotary case 21 and the fixed support body 20 that supports it. Since the seedling planting tool 26 on the lower side of the transmission is not included, the present invention is a seedling. The present invention is not limited to a planting device, and can also be applied to a seedling extraction device that performs an operation of simply taking out a seedling from a seedling mount.
[Brief description of the drawings]
FIG. 1 is a side view of a riding rice transplanter.
FIG. 2 is a plan view of the riding rice transplanter shown in FIG.
FIG. 3 is an external side view of the seedling planting apparatus.
FIG. 4 is a first side view showing a transmission mechanism of the seedling planting apparatus.
FIG. 5 is a side view showing a power transmission mechanism of the seedling planting apparatus (part 2).
FIG. 6 is a sectional view taken along line S1-S1.
FIG. 7 is a sectional view taken along line S2-S2.
FIG. 8 is a sectional view taken along line S3-S3.
FIG. 9 is a side sectional view of the seedling planting tool.
FIG. 10 is a first diagram showing the relationship between the state of the gear train and the state of the seedling planting tool.
FIG. 11 is a second diagram illustrating the relationship between the state of the gear train and the state of the seedling planting tool.
FIG. 12 is a third diagram illustrating a relationship between the state of the gear train and the state of the seedling planting tool.
FIG. 13 is a fourth diagram illustrating a relationship between the state of the gear train and the state of the seedling planting tool.
FIG. 14 is a fifth diagram illustrating a relationship between the state of the gear train and the state of the seedling planting tool.
FIG. 15 is a sixth diagram illustrating a relationship between the state of the gear train and the state of the seedling planting tool.
FIG. 16 is a view showing a locus of a tip of a seedling planting tool.
FIG. 17 is a diagram showing the movement locus of the tip of the seedling planting tool in consideration of the movement of the machine body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 5 Traveling vehicle body 6 Lifting link apparatus 7 Seedling planting part 14 Seedling planting apparatus 20 Fixed support body 21 Rotary case (rotary body)
21L, 21R Split body 24 Rotating body rotation center line 25 Final shaft 26 Seedling attachment tool 30 Drive gear 35 Rotating gear 36 Intermediate gear 37 First counter gear 38 Second counter gear 39 Final gear 40 Fixed gear 40a Stop)

Claims (5)

A rotary body (21) that rotates about the rotation center line in the left-right direction is provided with a final axis (25) in the left-right direction that is eccentric with respect to the rotation center axis so as to be rotatable, and the rotary body (21) on the final axis (25). The seedling planting tool (26) is integrally attached to the projecting portion projecting from side to side from the end, and the final gear (39) rotating integrally with the final shaft (25) is connected to the rotary body (21) via a gear train. The gear train is provided with a rotating gear (35) that rotates while moving on a circular orbit about the rotation center line (24) of the rotating body, and meshes with the rotating gear to rotate the gear. A seedling planting apparatus, wherein a fixed gear (40) for determining a track of the gear is an internal gear, and a final shaft (25) is provided inside the fixed gear. The seedling planting device according to claim 1, wherein the rotating body (21) and the fixed gear (40) are arranged so as not to overlap in a side view. The seedling planting device according to claim 1 or 2, wherein the fixed gear (40) is fixed to a fixed support (20) that rotatably supports the rotating body (21) from the outside. The rotating body (21) is composed of left and right divided bodies (21L, 21R), and a drive gear (30) for driving the rotating body (21) is provided, so that the left and right divided bodies (21L, 21R) and driving gear ( The seedling planting device according to any one of claims 1 to 3, wherein the drive gear (30) is fixed to the rotating body (21) by a coupling member (69) that couples 30) together. The gear train includes meshing with the intermediate gear (36) which rotates integrally with the rotary gear, a first counter gear meshing with the intermediate gear (37), to said first counter gear integrally rotating final gear (39) second counter becomes from the gear (38) to the first counter gear (37), a second counter gear (38), the final gear (39) and the final shaft combinations (25) a plurality of sets, rotating bodies ( 21) A plurality of seedling planting tools (26) are provided on the circumference centering on the rotation center line of 21) , and a pair of first counter gear (37) and second counter gear (38) rotate. The first counter gear (37) or the second counter gear (38) of the other set is arranged on the central axis so as not to overlap in a side view, and two different sets of the first counter gear (37) and the second counter gear ( the spacing between the rotation center axis 38) the The counter gear (37) or the second counter gear (38) seedling planting device according to any one of claims 1 to 4 and smaller than twice the diameter of the.

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