JPH0444023Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention rotatably supports a rotary case in a planting case, and a sun gear provided at the center of rotation of the rotary case allows a plurality of plants to be planted via a planetary gear. This invention relates to a planting device for a rice transplanter in which the claws are connected and supported so that seedling planting work can be carried out through the rotational movement of a rotary case.

"Prior art" Utility patent application filed in 1983 by the applicant
In this type of planting device such as No. 171095, an eccentric gear is used for the sun gear and planetary gear installed inside the rotary case, and when the rotary case rotates, the planetary gear that revolves around the sun gear rotates at an inconstant speed. There is a means for appropriately changing the claw posture.

``Problem that the invention seeks to solve'' However, in this case, the amount of change in the planting claw posture, that is, the amount of swing of the planting claw, is determined by the eccentricity of the sun gear and planetary gear, so an eccentric gear is used. Otherwise, there were structural limitations such as the inability to change the amount of swing of the planting claw, and the inability to form the sun gear and planetary gear with normal gears.

"Means for Solving the Problems" Therefore, the present invention provides a rotation control method for rotating the sun gear in a structure in which a plurality of planting claws are connected and supported via a planetary gear to a sun gear provided at the center of rotation of a rotary case. A mechanism is provided, and the rotation control mechanism is operated in synchronization with the rotational movement of the rotary case to rotate the sun gear, thereby switching the planting claw attitude to the seedling taking out attitude or the seedling planting attitude. That is.

"Function" Therefore, since the sun gear is rotated by an operation from outside the rotary case to change the planting claw posture, it is not necessary to form the sun gear and the planetary gear with eccentric gears, and the internal structure of the rotary case is complicated. The planting claw can be attached to the rotary case so that its posture can be changed freely, and while maintaining the swinging function of the planting claw, it is easy to downsize the rotary case and simplify the shapes of the sun gear and planetary gear. In addition, the range of change in the amount of swing of the planting claw can be set without being restricted by the rotary case shape as in the conventional eccentric gear specification, and a variety of planting claw locus shapes can be obtained. It is something.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a cross-sectional explanatory diagram of the rotary case part, Fig. 2 is a side view of the riding rice transplanter, and Fig. 3 is a plan view of the same.
The rear end of the vehicle body frame 3 on which the engine 2 is mounted is connected to a transmission case 4, and front wheels 6 for running in paddy fields are supported on both sides of the front part of the transmission case 4 via a front axle case 5. A transmission case 7, which is an axle case, is connected to both rear sides of the case 4, and a rear wheel 8 for running in paddy fields is supported at the rear end of the transmission case 7. A spare seedling stand 10 is attached to the outside of both sides of the bonnet 9 that covers the engine 2, and the transmission case 7 and the like are covered by the vehicle body cover 12 forming the step 11, and the driver's seat 13 is mounted on the upper part of the vehicle body cover 12. A steering handle 14 is provided at the rear of the bonnet 9 in front of the driver's seat 13.

Further, numeral 15 in the figure is a planting section that includes a seedling stand 16 for multi-row planting, a plurality of planting claws 17, etc., and a rear-tilting seedling stand 16 with a high front and a low rear is connected to a guide rail 18. A rotary case 21 is supported by the planting case 20 via guide rails 19 so as to be slidable back and forth in the left and right directions, and rotates at a constant speed in one direction as shown in FIG. 4. Claw cases 22, 22 are arranged at symmetrical positions about the axis, and a planting claw 17 is attached to the tip of the claw case 22. Further, a support frame 24 is provided on the front side of the planting case 20 via a rotation fulcrum shaft 23, and a support frame 24 is provided on the rear side of the traveling vehicle 1 via a three-point link mechanism 27 including a top link 25 and a lower link 26. It is provided with a lifting cylinder 28 that is connected to each other and lifts and lowers the planting section 15 via the link mechanism 27,
The front and rear wheels 6, 8 are driven to move at a substantially constant speed, and at the same time, one seedling is taken out by the planting claw 17 from the seedling platform 16 which slides back and forth from side to side, and the seedlings are continuously planted. Configure it to do the work.

In addition, in the figure, 29 is a traveling speed change lever, 30 is a planting lift lever, 31 is a planting sensitivity adjustment lever, 32
is a traveling clutch pedal, 33, 33 are left and right brake pedals, 34... is a float for field leveling, and the float 34... is supported on the lower side of the planting case 20 via a planting depth adjustment link 35, etc. are doing.

Furthermore, as shown in FIG. 5, the two seedlings provided on the rotary case 21 are connected to the seedling take-out port 37 of the seedling take-out plate 36 on the guide rail 18 provided at the lower end of the seedling stand 16 via the claw cases 22, 22. The attachment claws 17, 17 are moved alternately, and two seedlings are planted by the two planting claws 17, 17 in one rotation of the rotary case 21.

As shown in FIG. 6, a planting claw drive shaft 38 which is an output shaft is rotatably supported at the rear end of the planting case 20, and a rotary case 2 is attached to both ends of the drive shaft 38.
1 and 21 are fixedly supported symmetrically. Furthermore, a pair of positive sun gears 39, 39, positive idle gears 40, 40, and positive planetary gears 41, 41 each having the same number of teeth are provided in the rotary case 21, and the sun gear 39 is loosely fitted to the planting claw drive shaft 38. At the same time, the idle gear 40 is supported on an intermediate shaft 42, and the planetary gear 41 is supported on a pawl case shaft 44 fixed to the pawl case 22 with bolts 43, and the idle gears 40 are symmetrically supported on the two central sun gears 39, 39, respectively. , 40, the two planetary gears 41, 41 are constantly meshed in a row.

Furthermore, a rotation control mechanism 45 for rotating the sun gears 39 in forward and reverse directions is provided in the planting case 20, and a main gear 47 is connected to an input sprocket member 46 that transmits driving force to the planting claw drive shaft 38. Two subordinate gears 48, 48, which are fixedly installed and meshed with the gear 47, are connected to rotating shafts 49a, 49a, respectively.
Bearing members 49, 49 in the planting case 20 via
Eccentric shafts 50, 50 supported by the driven gears 48, 48, respectively, and the sun gears 39, 3.
The shafts 52, 52 of fixing pieces 51, 51, which are integrally formed with the rotary case 21, are connected by crank arms 53, 53, and when the rotary case 21 rotates, the sun gears 39, 39 are rotated forward and backward in different directions. The rotation of the claw case shaft 44 is made slower than the rotation of the rotary case 21 while the claw case shaft 44 moves from the seedling take-out position of the planting claw 17 to the seedling planting position. The rotary case 21 is installed between the seedling planting position and the seedling removal position.
The rotation of the nail case shaft 44 is made faster than the rotation of the nail case shaft 44, and the movement trajectory l of the planting nail 17 is configured to draw a vertically long closed loop oval. In other words, when the claw case shaft 44 reaches the seedling extraction position, it rotates freely with respect to the rotation of the rotary case 21, and the position of the planting claw 17 is directed upward, while when the claw case shaft 44 reaches the seedling planting position, the rotary case 21 The planting claw 17 is configured to rotate with a lag with respect to the rotation of the planting claw 17 so as to face downward.

Further, the pawl case shaft 44 allows a camshaft 54 to freely rotate therethrough, and one end of the camshaft 54 is fixedly supported by the rotary case 21 via a position adjustment plate 55 and a bolt 56 so as to be rotatably adjustable. , a push rod 57 that connects the other end of the camshaft 54 to the extrusion claw 17a for forced planting in the claw case 22;
The pusher arm 58 and the pushing cam 59 are connected to each other, so that when the planting claw 17 enters the rice field, the push rod 57 is advanced and the seedlings held between the planting claws 17 are pushed out into the soil by the pushing claw 17a. It is composed of

By the way, as shown in FIGS. 7 to 8, the vertical groove 60 on the bottom surface of the center float 34a is formed to have a large width d to improve the flow of mud on the bottom surface of the float 34a. A front pressure sensor 61 is embedded in the front part of 34a, and the elevation of the planting section 15 is controlled based on the detected value of the sensor 61.

This embodiment is constructed as described above, and by continuously rotating the rotary case 21 in one direction at a constant speed in the longitudinal direction of the machine with the planting claw drive shaft 38 at the center, each gear 39, 40, 41, the claw case shaft 44 maintains a constant posture with respect to the planting case 20, and the planting claw 17 substantially takes out the seedlings during one rotation of the rotary case 21 due to the crank movement of the crank arm 53 inside the planting case 20. When reaching the position, the sun gear 39 is slightly rotated in the opposite direction to the rotation direction of the rotary case 21, and the planting claws 17 are turned upward by an angle (α) from the neutral state, and the seedlings are taken out from the seedling platform 16. On the other hand, when the planting claw 17 reaches approximately the seedling planting position, the sun gear 39 is slightly rotated in the same rotational direction as the rotary case 21, and the planting claw 17 is placed in a downward position by an angle (α) to plant the seedlings. It is something.

FIGS. 9 to 12 show other modified structural examples of the rotation control mechanism 45, and those in FIGS. 9 to 10 have the sun gear 39 section having a triple shaft structure,
A pair of left and right partial gears 62a, 62a, 62b, 62b are provided so as to mesh with the large diameter gear portions 39a, 39b of the pair of sun gears 39, 39 arranged in parallel and overlapping each other alternately at regular intervals. And each gear 63, 64, 65 and 6 is attached to the planting claw drive shaft 38.
3, 64a, 64b, 65 and partial gear shaft 66
The partial gears 62a, 62a, 62b, 6
2b are interlocked and connected, and when the planting claw 17 reaches the seedling take-out position and the seedling planting position, the sun gear 39 is slightly rotated in forward and reverse directions to connect the planting claw 1.
Left and right partial gears 62 are attached to the large diameter gear portions 39a and 39b so that the gears 7 are placed in upward and downward postures.
a, 62a, 62b, and 62b are configured to mesh alternately.

Moreover, the one in FIG. 11 is the rotary case 2.
The cam 6 interlocks with the drive shaft 38 during one rotation of the
7 is the operation arm 6 of each sun gear 39, 39.
8, 68, the sun gears 39, 39 are appropriately rotated in forward and reverse directions so that the planting claw 17 faces upward at the seedling take-out position and downward at the seedling planting position as described above. This is what I did.

Furthermore, the one in FIG. 12 has each of the sun gears 3
The tips of piston rods 69a, 69a of hydraulic or electric cylinders 69, 69 supported on the planting case 20 side are connected to the fixed pieces 51, 51 of 9, 39,
By expanding and contracting the cylinder 69 in synchronization with the rotation of the rotary case 21, the sun gear 39 is rotated in the forward and reverse directions as described above, and the planting claws 17 are placed in upward and downward postures as appropriate.

Furthermore, what is shown in FIGS. 13 to 14 is an idle gear 40 in the rotary case 21.
is abbreviated as two sun gears 39 in the center and two planetary gears 41, 41 that mesh with the sun gears 39, respectively.
In the case shown in FIG. 13, pulse motors 71, 71, which are rotation control mechanisms, are connected to the sun gears 39, 39 through gear transmission mechanisms 70, respectively, and are synchronized with the rotation of the rotary case 21. By driving the motors 71, 71 in the forward and reverse directions and rotating the sun gears 39, 39 in the forward and reverse directions as appropriate, the planting claws 17 can be placed in upward and downward postures as appropriate while the rotary case 21 is rotating. It is composed of In this configuration, not only the gear configuration within the rotary case 21 is simplified, but also the rotary case 21 can be made smaller and lighter. On the other hand, a gear configuration in which the number of gears in the rotary case 21 is increased to 7 or 9 or more is also possible. In such a case, it is possible to use small diameter gears and the width of the rotary case 21 can be reduced. , the distance between the center of the rotary case 21 and the claw case shaft 44 can be increased without using a large diameter gear.

Furthermore, in the case shown in FIG.
a, 44b, and are integrally connected in a multi-connected manner.
A sun gear 39 and a planetary gear 41 are respectively installed inside, and the two claw case shafts 44a, 44
b are connected and supported by planetary gears 41, 41 of different rotary cases 21, 21, respectively, and a gear transmission mechanism 70 is connected to the sun gears 39, 39.
The pulse motors 71, 71 are connected separately through the rotary case 21 on either the left or right side.
The planting claws 17 on one side of the left and right rotary cases 21, 21 are fixed by the forward and reverse rotation of the sun gear 39, and the planting claws 17 on one side of the left and right rotary cases 21, 21 are fixed by the forward and reverse rotation of the sun gear 39 of the other rotary case 21. The planting nails 17 on the other side are configured to integrally face upward and downward, respectively.

As is clear from the above embodiments, the present invention has a sun gear 3 provided at the center of rotation of the rotary case 21.
A plurality of planting nails 1 are connected to 9 through a planetary gear 41.
7 is connected and supported, a rotation control mechanism 45 for rotating the sun gear 39 is provided, and the rotation control mechanism 45 is operated in synchronization with the rotational movement of the rotary case 21 to rotate the sun gear 39. The configuration is such that the posture of the claws 17 can be switched between the seedling taking-out posture and the seedling-planting posture, and the sun gear 39 is rotated by an operation from outside the rotary case 21 to change the posture of the planting claws 17. It is not necessary to form the planting claw 17 with an eccentric gear, and the planting claw 17 can be attached to the rotary case 21 in a manner that allows the posture to be changed freely without configuring the internal structure of the rotary case 21 in a complicated manner. It is possible to easily reduce the size of the rotary case 21 and simplify the shapes of the sun gear 39 and the planetary gear 41 while maintaining the functions.
The setting of the change range of the swing amount of the planting claw 17 is performed without being restricted by the shape of the rotary case 21 unlike the conventional eccentric gear specification, and the setting of the change range of the swing amount of the planting claw 17 is
This allows a variety of trajectory shapes to be obtained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional explanatory diagram of the rotary case part, Figure 2
The figure is an overall side view, Figure 3 is a plan view of the same, Figure 4 is a side view of the planting section, Figure 5 is an explanatory view of the same plane, Figure 6 is a partially enlarged explanatory view, and Figure 7 is a main view. FIG. 8 is a bottom view of the float portion, FIG. 8 is a view taken along the same line, and FIGS. 9 to 14 are explanatory views showing other modified structural examples. 17... Planting nail, 21... Rotary case, 3
9...Sun gear, 41...Planetary gear, 45
...Rotation control mechanism.

Claims (1)

[Scope of utility model registration request] In a structure in which a plurality of planting claws 17 are connected and supported by a sun gear 39 provided at the rotational center of the rotary case 21 via a planetary gear 41, a rotation control mechanism 45 for rotating the sun gear 39 is provided, and rotational movement of the rotary case 21 is provided. The rotation control mechanism 45 is operated in synchronization with the sun gear 3.
A planting device for a rice transplanter, characterized in that the posture of the planting claw 17 can be switched to a seedling take-out posture or a seedling planting posture by rotating the planting claw 9.