JP2508795Y2 - Rotary planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rotary planting device for a rice transplanter.

(Prior Art) First, a conventional rotary planting device will be briefly described. In FIG. 9 (a), (100) is a transmission case, (102) is a rotary shaft (101) protruding from the transmission case (100). ) Attached to the rotary case, (10
3) is a planting arm attached to both ends of the rotary case (102), and (104) is a seedling stand.

As shown in FIG. 10, in the planting arm (103), the planting claw (105), the push rod (106), and the pushing claw (10
7) and push cam (108) with planted arm (103)
The push arm (110) swings against the coil spring (109) when rotated relative to the push rod (1).
Pull out the pushing claw (107) via 06).

Then, when the rotary case (102) as a rotating body is rotated in the direction of arrow A in FIG. 9 (a) by the rotary shaft (101) which is the rotating shaft, the planting arm (103) is moved to the seedling table (104). When turning the rotary shaft (101) as a center in a posture in which it faces, and moving the side facing the seedling stand (104) from top to bottom during this turning movement,
At the tip of the planting claw (105), only one seedling (a) was split from the seedling mat on the seedling mounting table (104), and then planted in the field scene (b) at the lower limit of its descending, and then In the field scene (b).

The cam step portion (108 ') of the cam (108) of the rotary planting device as described above is formed to be long along the circumference thereof as shown in FIG. Due to the rotation of the push cam (108) relative to the planting arm (103) accompanying the rotation of the rotary case (102), the rear stage (108b ') of the cam stage (108') at the time of planting.
When the engagement with the push arm (110) is released, the pushing force of the coil spring (109) pushes the pushing claw (107) through the push rod (106) to release the seedling (a),
On the other hand, when the planting arm (103) ascends immediately after planting, the push arm (110) swings against the coil spring (109) at the front stage (108a ') of the cam stage (108'). Move it and push it out through the push rod (106) (10
7) is designed to be pulled in.

In addition, due to the non-uniform speed transmission gear (eccentric gear mechanism) in the rotary case (102), the postures of the planting arms (103) face down while rotating with a delay when descending so as to approach the field upper surface (b). On the other hand, when it rises after planting, it rotates and changes its posture in the horizontal direction. The closed loop of the locus of movement of the tip of the planting claw (105) is curved by one. On the other hand, the other has a flat elliptical shape that is closer to a straight line.

(Problem to be Solved by the Invention) However, since the center of gravity of the planting arm is located away from the planting axis which is the center of its rotation, the load torque that causes the planting arm to swing fluctuates.

Since the position of the center of gravity of the planting arm is in front of the planting axis, the torque that causes the planting arm to swing is such that the arm posture is horizontal when the planting arm rises to approach the rising upper limit after planting. The maximum is when changing to.

In addition, since the conventional planting arm pulls up the pushing claw against the spring force of the coil spring when the planting arm immediately after planting suddenly rises, the torque applied to the push cam also increases with this planting arm. The maximum is immediately after.

Then, both the rotation torque of the planting arm and the torque applied to the push cam are replaced with the rotation torque of the rotary case.

Therefore, according to the conventional device, the peak position of the rotation torque of the planting arm and the peak position of the rotation torque of the push cam overlap each other, which causes a large variation in the load torque on the rotary shaft.

If the torque fluctuation of the rotary shaft becomes large, rattling, twisting, deflection, etc. will occur in the planting transmission case and the entire planting part, and the fluctuation of the rotation speed will also increase. The rotation of the rotary case fluctuates when it is in the soil while holding it, which causes a problem that the planting posture of the seedlings is disturbed.

(Means for Solving the Problem) Therefore, the technical problem of the present invention is to reduce the torque fluctuation of the rotary shaft in the rotary planting device. In order to prevent the rotation speed of the rotary case from decreasing during the period from when it rushed into the soil until it escaped from the soil, the rotary planting device was configured by setting the pull-up position of the push rod. That is, when the push-up position of the push rod is raised above the field and the rotary case is moved above the horizontal position of the rotary case and moved to the vicinity of the horizontal position, the cam step portion acts as a time to act on the push arm. Therefore, a low cam between the position of the push rod pulling cam step portion and the push rod pushing cam step portion is formed to be long.

(Operation) According to the rotary planting device of the present invention, the peak position of the turning torque of the planting arm and the peak position of the torque of the planting shaft are different, and the load torque applied to the rotary shaft is increased even at the time of speed-up rotation. Averaging can be achieved.

Therefore, it is possible to prevent rattling, twisting, and bending of the planted transmission case and the entire planted part.

Further, since the rotation speed of the rotary case is smoothed, the locus of the tip of the nail is desired, and the posture of planting the seedlings is not disturbed.

(Example) Hereinafter, an example of the present invention will be described.

In FIGS. 7 and 8, (1) is a passenger vehicle body, which is provided with front and rear wheels (2) and (3) and travels by the power of an engine (4). (5) is a mission case, and (6) is a traveling transmission case.

A planting part (8) is provided behind the passenger vehicle body (1) via a lift mechanism (7).

A planting arm (9), a fertilizer applicator (10) and a seedling stand (11) are attached to the planting section (8).

(12) is a planting side transmission case, and the power of the engine (4) is transmitted to the transmission case (12) by a spline shaft (13).

Fig. 2 shows the transmission case (12) in the planting section (8).
It shows the transmission mechanism in the rotary case (20) attached to the.

The power transmitted to the transmission case (12) is transmitted by the endless chain (21) and the sprocket (22) to rotate the rotary shaft (24) via the unit clutch (23).

The rotary case (2
A sun gear (25) is loosely fitted in the gear (0), and the sun gear (25) is fixed to the transmission case (12). The sun gear (25) is adjustably fixed to the transmission case (12) by the phase adjusting member (26).

A hollow split rotary case (20) is mounted on the end of the rotary shaft (24) and is fixed to the rotary shaft (24) by a pin (27).

The rotary case (20) has an intermediate gear (28) (2) that meshes with the sun gear (25) and has the same number of teeth as the sun gear (25).
8) is rotatably mounted on the intermediate shafts (29) (29), and the planting shaft (30) has a planetary gear (31) with the same number of teeth that constantly meshes with the intermediate gear (28) as a supporting member. The sun gear (25), the intermediate gear (28) and the planetary gear (31) which are mounted via (32) are eccentric from the respective rotation centers by an appropriate dimension (a) as shown in FIG. It is a constant speed transmission gear.

A planting arm (33) is fixed to a support member (32) loosely fitted to the planting shaft (30). The planting shaft (30) is fixed to the rotary case (20) by a phase adjusting member (34), and (35) is a set screw for adjusting the phase of the planting shaft (30).

A cam (36) is attached to the planting shaft (30),
The push arm (37) is in contact with the cam (36).

The push arm (37) is pivotally supported by a shaft (38) and is biased by a coil spring (39) shown in FIG. 1 so as to come into contact with the cam (36).

In FIG. 1 (a), (40) is a planting claw and (41) is a pushing claw, which is pushed out by a push rod (42) driven by a push arm (37).

Further, as shown in FIG. 1 (b), the cam (36) has a cam step portion (108 ') shorter than the cam step portion (108') of the conventional cam (108) previously described in FIG. 10 (b). 36 ').

The cam (36) of the embodiment has a push arm (37) and a rear step (36b ') of the cam step (36') at the time of planting.
Is disengaged and the spring force of the coil spring (39) pushes out the pushing claw (41) through the push rod (42) to release the seedling (a), while the rotary case (2
0) rotates to move the planting arm (33) near the position above the horizontal position reference of the rotary case (20) shown in FIG.
When it is rotated up to about 0 °, the push arm (37) is swung against the coil spring (39) at the front stage (36a ′) of the cam stage (36 ′), and the push rod (42) ), And the size of the push-out claw (41) is pulled in through it.

Now, when the rotary case (20) as a rotating body is rotated in the direction of arrow A in FIG. 3 by the rotary shaft (24) which is its rotating shaft, it becomes a sun gear (25) which cannot rotate with respect to the transmission case (12). The meshing intermediate gear (28) rotates in the direction of arrow B as the rotary case (20) rotates.

The support member (32) interlocking with the intermediate gear (28) via the planetary gear (31) rotates in the direction of arrow C by the rotation of the intermediate gear (28), that is, in the direction opposite to the rotation direction of the rotary case (20). Therefore, the planting arm (33) pivotally moves about the rotary shaft (24) in a posture in which the planting arm (33) faces the seedling table (11). It should be noted that during this swiveling motion, one seedling is split from the seedling mounting table (11) at the tip of the planting claw (40), and planted in the field scene at the lower limit of descending, and then rising from the field scene. The specific means will be described later.

By the way, since the sun gear (25), the intermediate gear (28), and the planetary gear (31) are all eccentric gears that are eccentric by an amount a, the rotary case (20) rotates in the direction of arrow A. The support member (32) revolves, and the rotation of the support member (32) itself in the C direction is accompanied by the rotation of the eccentric gears (25), (28), (28) and (31) during one rotation. It is configured to be faster or slower depending on the difference in meshing pitch radius with respect to the rotating shaft.

Therefore, when the rotation of the planting arm (33) in the C direction is delayed with respect to the rotation of the rotary case (20), when the planting arm (33) descends so as to approach the field scene of the planting arm (33). On the other hand, each of the planting arms (33) is set so that the planting arms (33) can be moved up from the planting position so as to approach the upper limit of the rise.
When it descends so as to approach the field scene, it will lag behind the rotation of the rotary case (20) in the direction C and slowly rotate on its own, changing its posture downwards by the revolution, and ascending to approach the upper limit after planting. At this time, the closed loop of the movement locus of the claw tip is curved by one side and the other side is closer to a straight line because it moves slightly faster than the rotation of the rotary case (20) in the C direction and rotates to change its posture. It becomes a flat elliptical shape.

Next, the rotation of the rotary case (20) causes the planting arm (33) to swivel in a posture in which the planting arm (33) faces the seedling mounting table (11), as described above. Since the planting shaft (30) revolves together with the rotary case (20), the cam (36) relatively rotates in the planting arm (33).

Then, when the side facing the seedling placing table (11) is moved from the top to the bottom with the pushing claw (41) retracted, the tip of the planting claw (40) is placed on the seedling placing table (11). Only one seedling is divided from the seedling mat and further lowered while holding the seedling at the tip of the planting claw (40), and in the lowermost field scene (b), the rear step (36b) of the cam step (36 '). ′) And push arm (37)
Is disengaged, and the pushing force of the coil spring (39) pushes out the pushing claw (41), so that the seedling leaves the planting claw (40),
It is planted in the soil.

Then, with the pushing claw (41) pushed out,
As the rotary case (20) rotates, it rises above the field scene of the planting arm (33), and the rotary case (20)
When it is rotated about 7 ° above the horizontal position of, the front step (36a ′) of the cam step (36 ′) contacts the push arm (37) and resists the coil spring (39). Swing it and push it out through the push rod (42) (4
1) is pulled in, and the same operation is repeated thereafter.
Incidentally, FIG. 4 shows a state in which the cam front stage portion (36a ') contacts the push arm (37).

According to the structure described above, the eccentric gear mechanism in the rotary case (20) causes the planting arm (33) to rotate and change its posture in the horizontal direction immediately after planting. The rocking torque of (33) becomes maximum immediately after planting.

However, the cam step portion (36 ') is shorter than the conventional one, and when the planting arm (33) rises immediately after planting, the cam step portion (36') and the front step portion (36a ') are The push arm (37) does not contact, and the torque due to the pulling up of the putch rod (42) is not yet applied.

Then, after the rotary case (20) further rotates to come out of the field scene (b) of the planting claw (40) and the planting arm (33) has finished changing its posture, the rotary case (2
When (0) is rotated up to about 7 ° above the center line of the transmission case (12), which is the horizontal position, the front part (36a ') of the cam (36) pushes against the coil spring (39). Since the arm (37) is pressed, torque is applied to the rotary shaft (24) by pulling up the push rod (42).

FIG. 5 (a) is a graph showing the relationship between the rotation angle of the rotary case (20) and the torque fluctuation generated in the rotary shaft (24), and the thick line (X) is that of the present invention described in the embodiment. The thin line (Y) is a conventional cam (10
8) It shows the torque fluctuation due to.

The curve (Z) shown in FIG. 5 (B) represents the fluctuation of the rotation speed of the rotary case according to the present invention.

Compared with the conventional rotary planting device, the load torque on the rotary shaft is more average in the device of the present invention,
The rotation speed of the rotary case is also smoothed.

Further, according to the present invention, since the rotation speed of the rotary case (20) does not decrease from the time when the planting claw (40) plunges into the field scene (b) until it escapes, the claw tip trajectory. Is close to the ideal, and the posture of planting seedlings is not disturbed.

In the conventional case, the load torque on the rotary shaft (101) varies greatly, so that the rotation speed of the rotary case (102) varies greatly, and when the tip of the planting claw (105) is under the field scene (b). Due to the fluctuation, there is a problem that the planting posture of the seedling (a) is disturbed.

That is, as shown in FIG. 6, the tip of the planting claw is the planting part (8).
A static locus (s) (s') is drawn against the planting part (8)
Is drawn by the passenger car body (1) and moves, thereby drawing a locus (t) (t ') on the field scene (b).

And in the conventional type, the load torque on the rotary shaft (101) becomes maximum when the tip of the planting claw (105) is still in the soil immediately after planting, and at that time, the brake is applied to the rotation of the rotary case (102). Because of this, the planting nail (105)
As shown in (b), the movement trajectory (t ') of the tip is in the shape of being dragged forward by the vehicle speed when the tip of the claw is in the soil.

Therefore, the conventional one has a planted claw (10
There is a problem that the seedling (a) is pushed down in 5).

However, according to the present invention, the planting nail (40)
Since the rotation speed of the rotary case (20) does not decrease from the time when the animal rushes under the field scene (b) until it escapes,
(A) As shown in the figure, the locus of the tip of the planting claw (40) is close to the ideal one, and the planting posture of the seedling (a) is not disturbed.

(Effects of the Invention) In any case, according to the rotary planting device of the present invention, the rotation speed of the rotary case is prevented from decreasing during the period from when the planting claw rushes into the soil until it escapes from the soil. Therefore, the load torque on the rotary shaft is averaged, and the peak value of the torque can be reduced.

Therefore, there is a feature that rattling, twisting, bending, noise, etc. of the planting transmission case and the entire planting part due to torque fluctuations are prevented, fluctuations of the rotation speed are reduced, and the planting posture of the seedlings is not disturbed.

[Brief description of drawings]

FIG. 1 (a) is a vertical cross-sectional view of the planting arm, FIG. 1 (b) is an enlarged view of the cam, FIG. 2 is a vertical cross-sectional view of the rotary case, FIG. The figure is a side view of the planting part, Fig. 5 (a) is a graph showing the torque fluctuation, Fig. 5 (b) is a graph showing the fluctuation of the rotation speed of the rotary case of the present invention, and Fig. 6 (a) (b). ) Is a locus view of the tip of a planting claw, FIGS. 7 and 8 are side views and a plan view of a passenger car body that pulls the planting section, and FIG. 9 (a) is a side view of the planting section according to the related art. FIG. (B) is an enlarged view of a conventional cam, and FIG. 10 is a vertical cross-sectional view of a conventional planting arm. 20 …… Rotary case 24 …… Rotary shaft 25 …… Sun gear 28 …… Intermediate gear 30 …… Plant shaft 31 …… Planet gear 33 …… Plant arm 36 …… Cam 36 ′ …… Cam step 37… … Push arm 40 …… planting claw 41 …… pushing claw 42 …… push rod

Claims (1)

(57) [Scope of utility model registration request] Claims: When the push-up position of the push rod is raised from the field and the rotary arm is moved above the horizontal position of the rotary case to the vicinity thereof, the cam step acts on the push arm. The rotary planting device is characterized in that a low cam between the position of the push rod pull-up cam step portion and the push rod push-out cam step portion is formed to be long so as to be set.