JP4461749B2 - Seedling planting equipment - Google Patents

Description

  The present invention relates to a seedling planting apparatus used in a seedling transplanting machine such as a rice transplanter, and belongs to the technical field of agricultural machinery.

A seedling planting tool is provided in a rotary case (rotating body) that rotates around the planting drive shaft in the horizontal direction, and a planting transmission case (fixed) is transmitted to the planting drive shaft. A seedling planting device having a structure in which a support body is provided in the vicinity of the side of a rotary case is known from Patent Document 1, for example.
Japanese Examined Patent Publication No. 7-112381

  In the above prior art, since the same number of rotor cases as the number of planting strips are required to house the gear train for operating the seedling planting tool, the total number of parts is large and the cost is high. There was a point. Then, the subject of this invention is providing the seedling planting apparatus which can operate | move correctly the seedling planting tool of 2 items | stripes with a common gear train.

  In addition, the fixed support that rotatably supports the rotating body having the seedling planting tool from the outside can be divided so that the rotating body can be detached, thereby facilitating the assembly and maintenance of the rotating body. In particular, by dividing the fixed support body vertically so that the split surface of the fixed support is substantially in a horizontal plane, oil spillage is eliminated during maintenance and further maintenance is improved.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 is characterized in that the three final shafts (25) are arranged on the circumference centering on the rotation center line (24) of the left and right rotating bodies (21) with a phase of 120 degrees from each other. (21) is provided so as to be rotatable, and a seedling planting tool (26) is attached to each final shaft (25), and the left and right rotating bodies (21) are rotated from the outside to the outer periphery of the left and right rotating bodies (21). capable provided stationary support for supporting (20) integrally planting transmission section and (12a), the interior of the space between the left and right of the rotary body (21) is configured to be closed by the stationary supporting member (20), fixed An internal gear fixed gear (40) fixed to the support (20) is provided, and a rotation gear (35) that meshes with the fixed gear (40) is provided in the internal space. As the rotary body (20) rotates. The rotating gear (35) rotates while moving on the circular orbit, and the rotating gear (35) It has a structure for transmitting to the axis (25) and seedling planting apparatus according to claim.

  As a result, the seedling planting tool (26) attached to the left and right rotating bodies (21) can be operated with a common gear train provided in the internal space between the left and right rotating bodies (21). The number of parts can be reduced. In addition, since the internal space for accommodating the gear train is closed by the fixed support (20), not only the gear train is not exposed to muddy water or dust from the outside, but also the internal space has a gear. Oil (lubricating oil) for smoothly operating the rows can be filled, durability of the gear rows can be improved, and the seedling planting tool (26) can be smoothly operated.

The invention according to claim 2 divides the fixed support (20) vertically so that the left and right rotating bodies (21) provided with the seedling planting tool (26) can be attached and detached , and the rotating body ( The rotating body (21) is arranged so that the rotating speed of the rotating body (21) is higher when the number of seedling planting tools (26) is larger on the rear side than the front center line (24) of 21). The seedling planting apparatus according to claim 1, wherein the seedling planting apparatus is configured to rotate at a non-uniform speed .

  Thereby, in addition to the operation of the invention according to claim 1, the fixed support (20) is divided into two vertically and the upper half of the fixed support (20) can be removed. Maintenance of the body (21) can be facilitated. Moreover, since the opening side of the lower half of the fixed support (20) faces upward, the oil inside does not leak out even if the upper half is removed, further facilitating maintenance.

In short, according to the first aspect of the present invention , the three final axes (25) are arranged at a phase of 120 degrees with respect to each other on the circumference around the rotation center line (24) of the left and right rotating bodies (21). A rotating body (21) is rotatably provided, a seedling planting tool (26) is attached to each final shaft (25), and the left and right rotating bodies (21) are arranged on the outer periphery of the left and right rotating bodies (21). A fixed support (20) that is rotatably supported from the plant is provided integrally with the planting transmission part (12a), and the internal space between the left and right rotating bodies (21) is closed by the fixed support (20). An internal gear fixed gear (40) fixed to the fixed support (20) is provided, and a rotating gear (35) that meshes with the fixed gear (40) is provided in the internal space to rotate the rotating body (20). Accordingly, the rotating gear (35) rotates while moving on the circular orbit, and the rotating gear (3 ) From since a configuration to transmit to the final shaft (25), that together with attained to reduce the number of parts of the entire seedling planting device to operate smoothly seedling planting device (26) to improve the durability of the gear train Can do.

Further, according to the invention described in claim 2, in addition to the effect of the invention according to claim 1, the fixed support (20) is divided into two upper and lower, it is possible to remove the upper half, the rotating body ( 21) can be easily assembled and maintained. In particular, since the lower half of the fixed support (20) faces upward, the internal oil does not leak out, and maintenance of the fixed support (20) itself can be easily performed. Furthermore, the rotation body (21) can be rotated smoothly and stably by speeding up the rotation of the rotation body (21) by the amount delayed by the weight imbalance.

An embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a riding rice transplanter equipped with a seedling planting device of the present invention. This riding rice transplanter 1 has a pair of left and right front wheels 3 and 3 mounted on an engine 2 and driven to rotate. A 6-row seedling planting portion 7 is connected to the rear of the traveling vehicle body 5 including the wheels 4 and 4 via a lifting link 6. A steering seat 8 is installed in the upper part of the engine 2 on the rear side of the traveling vehicle body 5, and a steering handle 9 for steering the front wheels 3, 3 is provided on the front side of the steering seat 8. Reference numeral 10 denotes a spare seedling placing table on which spare seedlings are placed.

  The seedling planting section 7 is provided with a seedling mounting tank 13 that can be reciprocated left and right so that the front portion is placed higher on the upper side of the transmission case 12 that is input from the traveling vehicle body 5 side. -A set of seedling planting devices 14,. When the aircraft is advanced with the float 15 in contact with the ground, the seedling tank 13 reciprocates left and right, and the mat seedlings on the tank are sequentially supplied one by one to the seedling outlet 16 on the lower end of the tank. The seedling planting device 14 separates and takes out and plantes it in the field.

  The seedling planting device 14 has the following configuration. A fixed support body 20 having a ring shape in a side view is integrally provided at the rear end of the planting transmission portion 12a, and a rotary body (rotary case) 21 is rotatably fitted through the oil seal 23 therein. is doing. The oil seal 23 is configured to be protected so as to be covered from the outside by the rib protruding portion 21a of the rotator 21 itself, whereby the durability of the oil seal can be maintained for a long time. The rotating body 21 is provided with three final shafts 25, 25, 25 so as to be rotatable at a phase of 120 degrees with respect to each other on a circumference centered on the rotation center line 24. The seedling planting tools 26, 26, and 26 are integrally attached to the left and right ends protruding from 21.

  A drive gear 30 that rotates integrally with the rotating body is provided inside the rotating body 21. By rotating the drive gear 30 with an input gear 31 provided at the rear end of the planting transmission portion 12a, the rotating body 21 rotates. In addition, the transmission portion from the chain sprocket 32a of the chain transmission device 32 transmitting to the input gear 31 to the input gear 31 transmitted through the transmission gears 28 and 29 has a predetermined phase when the transmission is cut off. A stop clutch (safety clutch) 33 that stops at is provided. In addition, as shown in FIG. 7, an input gear 31 is installed on the same axis as the sprocket shaft 27 of the chain sprocket 32a, and a safety clutch 33 is provided between the chain sprocket 32a and the input gear 31. If the chain sprocket 32a is configured to slide against the tension spring 34 when the safety clutch 33 operates in the disengagement direction, the input gear 31 or the rotating body 21 is driven. The tooth width of the drive gear 30 can be minimized and the weight can be reduced.

  FIG. 9 shows the meshing state of the drive gear 30 and the input gear 31. The number of teeth of the drive gear 30 is three times the number of teeth of the input gear 31, and the drive gear 30 is marked with three marks Q1, Q2 and Q3 (0, 120 based on the meshing position with the input gear 31). , 240.) is a non-equal-diameter gear having a maximum diameter, and the input gear 31 has a circle (Q) at one place (the position of 0 on the basis of the meshing position of the drive gear 30). It is an unequal-diameter gear with a small diameter. Therefore, the drive gear 30 is zero. , 120. 240. , The rotational speed of the drive gear 30 increases, and the rotational speed of the drive gear 30 changes in 1/3 period.

  In addition, a gear train for transmission to the final shafts 25, 25, 25 is provided inside the rotating body 21. The gear train meshes with the rotation gear 35 that rotates while moving on a circular path around the rotation center line 24 of the rotating body 21, the intermediate gear 36 that rotates integrally with the rotation gear 35, and the intermediate gear 36. A first counter gear 37, three second counter gears 38, 38, 38 rotating integrally with the first counter gear 37, and the second counter gears 38, 38, 38 attached to the final shafts 25, 25, 25; 38, and final gears 39, 39, 39 meshing individually with each other. 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 rotating body 21. The second counter gear 38 and the final gear 39 are non-circular gears (unequal-diameter gears).

  When the rotating body 20 rotates, the three seedling planting tools 26, 26, and 26 move along the circular path. At that time, the operation of the rotating gear 35 interlocked with the rotation of the rotating body 21 is transmitted to the final shafts 25, 25, 25 through the gear train, and as shown in FIGS. 26 change. Thereby, the seedling planting tool 26 operates so that the tip of the seedling collecting claw 47 described later draws a locus P. The tip movement locus of the seedling claw 47 taking into account the movement of the machine body is as shown in FIG. Each tip movement locus P ′ (1-3) is due to the difference in the moving speed of the airframe, and the moving speed increases in the order of P ′ (1), P ′ (2), P ′ (3). The locus P includes a stroke C that moves further backward from the seedling planting position B, which is the bottom dead center. After passing through, it will move almost directly above.

  Further, inside the rotating body 21, a braking cam 42 attached so as to rotate integrally with the final shaft 25, a braking arm 43 abutting on the outer peripheral surface of the braking cam, and the braking arm are connected to the braking cam. There are provided three sets of phase shift prevention mechanisms including a spring 44 pressed against the spring 42 and a spring locking body 45 that rotates together with the counter shaft 62 described later. 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 extracts a seedling described later. In addition, the seedling planting operation is performed accurately.

  Each seedling planting tool 26 is attached to the final shaft 25 by a cotter pin 46 so as to be integrally operated. The seedling planting tool 26 is provided with a bifurcated fork-shaped seedling picking nail 47 having a sharp tip and a seedling extruding body 48 that projects and retreats under the seedling picking nail. Yes.

  The operation mechanism of the seedling extrudate 48 is as follows. A cam arm 52 rotatably supported by an 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. The push cams 50 of the final shafts 25 are connected and held together by a circular plate 49 having a circular outer periphery so as not to rotate individually. Since this circular plate 49 has a circular outer periphery, it is possible to prevent water splashing during rotation, and the seedling planting posture is not disturbed by water splashing. Instead of the circular plate 49, a connecting body having a smooth outer peripheral shape such as an ellipse may be used. Further, the arm shaft 51 is supported by an extrusion restricting arm 53 that rotates integrally with the cam arm 52, and the extrusion that supports the tip of the extrusion restricting arm and the seedling extrudate 48 is supported. The end of the rod 54 is connected via a joint member 55. The joint member 55 is urged toward the side where the push rod 54 always protrudes by a push spring 56 which is a biasing body.

  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 in a position where the push-out spring 56 is compressed, the seedling extrudate 48 is in a retracted state. When the extrusion restricting arm 53 rotates from that position and the compression of the extrusion spring 56 is relaxed, the extrusion rod 54 is pushed out by the elastic force of the extrusion spring 56 and the seedling extrudate 48 protrudes.

  As described above, the seedling planting device 14 is provided with the seedling planting tools 26 on both the left and right sides of the rotating body 21 that is rotatably supported from the outside by the fixed support body 20, so that two rotating bodies can be simultaneously formed by one rotating body. In addition to planting seedlings, three seedling planting tools are provided on each strip to enable high-speed planting. In order to realize the above-described configuration, and to improve functionality and reduce costs, this seedling planting device employs the following characteristic structure.

  First, the fixed support 20 is divided into two vertically by a dividing surface 60 in a substantially horizontal front-rear direction plane, and the upper half member 20a is fastened to the lower half member 20b integral with the planting transmission portion 12a. It is configured to be joined and connected with attached bolts 61. By dividing the fixed support 20 in this way, the upper half of the fixed support can be removed, so that maintenance of the rotating body 21 is easy and maintenance of the fixed support is also facilitated. In addition, since the lower half of the fixed support has a dividing surface facing upward, there is no oil leakage, and maintenance is further facilitated.

  Next, the gear train transmitted to the three final shafts has a first counter gear 37 and three second counter gears 38, 38, a common counter shaft 62 arranged on the rotation center line 24 of the rotating body 21. 38, and the second counter gears 38, 38, 38 are respectively meshed with the corresponding final gears 39, 39, 39, and the power is transmitted from one counter shaft 62 to the three final shafts 25, 25, 25. It is configured to branch and transmit. As a result, an effective gear train can be configured with a small number of gears, and weight reduction and cost reduction can be achieved. In this case, as in this example, the intermediate shaft 63 to which the rotation gear 35 and the intermediate gear 36 are attached may be arranged on a straight line passing through the final shaft 25 and the counter shaft 62 out of the three in side view. . The counter shaft 62 and the intermediate shaft 63 are configured such that left and right rotating bodies 21 and 21 are fitted from the outside, and fixing bolts 64 and 64 are screwed from both the left and right sides to be joined and fixed. Accordingly, the positions of the left and right rotating bodies 21 and 21 can be easily matched, and the center of gravity can be positioned at the rotation center of the rotating bodies 21 and 21 so that the rotating bodies 21 and 21 can be smoothly rotated.

  Further, as described above, the gear ratio between the input gear 31 and the drive gear 30 is set to “3”, which is the same as the number of the seedling applicators 26, and both the gears 30, 31 are made to have unequal diameter gears. The drive gear is rotated at a non-constant speed so that the rotation speed of the drive gear changes in one-third cycle. However, the rotation speed of the drive gear 30 increases behind the rotation center line 24 of the rotating body 21. It is set when two seedling planting tools 26, 26 are located. That is, the number of seedling planting tools that move upward (located rearward of the rotation center line 24 of the rotating body 21) is lower than the number of seedling planting tools that move downward (front side of the rotation center line 24 of the rotating body 21). When the weight balance of the so-called seedling planting device becomes the back balance, the rotation speed of the rotating body 21 becomes slow. In short, the rotation of the rotating body is delayed due to the weight unbalance. By making it faster by a minute, the rotating body rotates smoothly and smoothly.

  In addition, the seedling planting tool 26 is set so that the rotation is slow when entering into the soil by the above-mentioned non-equal-diameter gear, and the rotation is fast when rising upward from the soil, Seedlings can be planted in a good posture, and the planting posture is stable.

  Further, when the seedling planting tool 26 enters the soil, if the seedling extruding body 48 is plunged in a state in which the posture is maintained in the vertical direction, compared to the case where the seedling extruding body 48 is plunged in an oblique direction, the hole is dug. Since the state becomes small, the planting posture is not disturbed, and a stable planting posture can be maintained. Moreover, if it sets so that the extrusion end surface (ground side end surface) of this seedling extrudate 48 may rise in the vertical direction while maintaining a horizontal state parallel to the ground, the planted seedlings can be moved when the seedling planting tool is raised. The amount of pushing forward is reduced, and the planting posture is improved. As described above, inside the rotating body 21, the braking cam 42 attached so as to rotate integrally with the final shaft 25, the braking arm 43 in contact with the outer peripheral surface of the braking cam, and the braking arm. There are provided three sets of phase shift prevention mechanisms comprising a spring 44 that presses against the braking cam 42 and a spring locking body 45 that rotates integrally with the counter shaft 62. The phase shift prevention using this compression spring 44 is provided. In the mechanism, it is difficult to assemble the rotating body 21. In particular, when only the spring locking body 45 is a separate part, there is a problem that the center of the fulcrum is shifted from the center of the rotating body due to the spring and is difficult to match. Therefore, in order to facilitate this assembly, the rotating body 21 and the bearing boss portion 21b are configured as separate parts as shown in FIG. First, the bearing boss portion 21b is externally fitted to the counter shaft 62, then the phase shift prevention mechanism is incorporated with the bearing boss portion 21b as a fulcrum, and finally the rotating body 21 is covered and fixed. As compared with the case where the rotating body 21 and the bearing boss portion 21b are integrated, assembly is facilitated.

Side view of rice transplanter Same as above Partially broken side view of seedling planting device Sectional view of the seedling planting device 1 Cross-sectional view of the seedling planting device 2 Cross-sectional view of the seedling planting device 3 The some modification of the seedling planting apparatus of FIG. 4 is shown. Cut side view of the main part of the seedling planting device Cut side view of the main part Side view showing the relationship between the state of the gear train and the state of the seedling planting tool 1 Side view showing the relationship between the state of the gear train and the state of the seedling planting tool 2 Side view showing the relationship between the state of the gear train and the state of the seedling planting tool 3 The movement trajectory of the seedling planting tool tip is shown. Expanded sectional view of the main part of the seedling planting device

DESCRIPTION OF SYMBOLS 1 Passenger rice transplanter 2 Engine 3 Front wheel 4 Rear wheel 5 Traveling vehicle body 6 Lifting link 7 Seedling planting part 14 Seedling planting device 20 Fixed support 20a Upper half member 20b Lower half member 21 Rotating body 25 Final shaft 26 Seedling planting tool 30 Drive gear 31 Input gear 60 Dividing surface 61 Tightening bolt

Claims (2)

Three final shafts (25) are rotatably provided on the rotating body (21) with a phase of 120 degrees on the circumference around the rotation center line (24) of the left and right rotating bodies (21). A stationary support (20) for attaching the seedling planting tool (26) to the final shaft (25) of the left and right and rotatably supporting the left and right rotating bodies (21) from the outside on the outer periphery of the left and right rotating bodies (21). An internal tooth which is provided integrally with the planting transmission part (12a) and is configured to close the internal space between the left and right rotating bodies (21) with the fixed support body (20), and is fixed to the fixed support body (20). The fixed gear (40) is provided, the rotating gear (35) meshing with the fixed gear (40) is provided in the internal space, and the rotating gear (35) moves on the circular orbit as the rotating body (21) rotates. octopus and rotates while, a structure for transmitting from said rotating gear (35) final axis to (25) Seedling planting apparatus according to claim. The fixed support (20) is divided into upper and lower parts so that the left and right rotating bodies (21) provided with the seedling planting tool (26) can be attached and detached, and after the rotation center line (24) of the rotating body (21). The rotating body (21) is configured to rotate at a non-uniform speed so that the rotating speed of the rotating body (21) becomes faster when the number of seedling planting tools (26) is larger on the side than on the front side. The seedling planting apparatus according to claim 1, wherein the seedling planting apparatus is characterized in that:

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