JPH0444022Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a fixed position stopping device for rotary planting claws.

(Prior Art) The following devices have been used as row fixing devices in conventional rice transplanters.

That is, as shown in FIG. 4, the power of the engine is transmitted to the bevel gear 3 of the intermediate shaft 2 with the planting clutch mechanism 1, and the intermediate shaft 2 is driven. The main shaft 7 is driven through the main shaft 7, and the planting arm shaft 12 is driven through the sprockets 9, 10 of the planting drive case 8 and the chain 11, and the sprocket 9 is connected to the main shaft through the safety clutch 13. Driven from shaft 7.

In addition, a sliding key 1 fixed to the feed shaft 14 of the seedling stand
6 engages with the reciprocating screw groove 17 of the camshaft 15, and the seedling stand is moved laterally by the rotation of the camshaft 15, but the camshaft 15 is driven from the intermediate shaft 2 by a chain (not shown). It is becoming more and more like this.

The clutch mechanism 1 is capable of stopping the driving of the entire planting claw, and as shown in FIG. 5, the pin 19 operated by the lever 18 engages with the highest part of the cam 20 in the clutch mechanism 1. As a result, the clutch pawl on the cam 20 side is separated from the clutch pawl on the bevel gear 3 and the clutch is disengaged, and the engagement with the highest part is only in one place, so the planting pawl is moved to the upper position. It can be stopped.

To stop the driving of the planting arm shaft 12 of each planting claw drive case 8, rotate the lever 21 shown in FIG. Then, the clutch pawl on the cam 23 side is separated from the clutch pawl on the sprocket 10, and the driving of the planting arm shaft 12 is stopped.

In any case, whether it is the entire planting clutch or individual planting clutches, the upper stop device of the planting claw is designed to stop at one place with one rotation of the planting claw, and when the clutch is cut, the planting will stop. The attached claw is designed to stop at a certain position, that is, just before the seedling opening.

(Problem to be solved by the invention) The above-mentioned upper stop device prevents the planting arm shaft 12.
If you try to stop the input shaft of the rotary case as shown in Figure 2 instead of stopping the planting claw, it will only stop at one place with one rotation of the planting claw, so it will be difficult to scrape the seedlings with one planting claw. Even if you check the adjustment of the amount of seedlings scraped with the other planting claw, it is necessary to release the upper stop (turn the planting lever from OFF to ON) and turn it by hand to the seedling removal opening. It's a pain to enter.

To improve this, Japanese Patent Application No. 59-256171 has a structure in which the front planting claw stops in front of the seedling outlet and the rear planting claw stops in front of the ground.

However, according to this method, the push arm stops at the stop position with the seedling still being released. In this case, since the seedlings are stopped with the seedlings still planted, the mud is lifted up when the planting claws rise. As a result, the mud remains stuck. Therefore, when the next planting begins, it is necessary to retract the push arm from the stop position in the section up to the seedling outlet, and even with time constraints, the mud that has been rolling around will adhere to the outlet. , which may have a negative impact on seedling harvest. Also, the push arm moves in and out by driving the cam,
According to the above, since the cam and push arm disengage and stop the clutch without resistance, it does not have any effect on stopping the movement of the pawl.

(Means for solving the problem) Therefore, the technical problem of this project is to find a fixed position of the planting claw that can promote the release of mud when the planting claw is raised, and that can quickly operate the fixed position stop. The purpose of the present invention is to provide a stopping device, and the technical means of this proposal to solve this technical problem is a rotary case with a planetary gear mechanism that drives two rotary planting claws. The rear planting claw is configured to stop between a position in front of the ground and the input shaft, and the push arm of the planting claw is stopped in a raised state after pushing out the planting, and the stopping point is set at one rotation of the planting claw. The fixed position stop cams in the upper stop device are configured so that there are two positions for the upper stop device.

(Example) The embodiments shown in the drawings will be described below.

The one in Fig. 1 uses the planting arm shaft 12 as the input shaft of the rotary case 26, and the input shaft 2
5 is rotatable with respect to the planting transmission case 8.

A sun gear 27 is loosely fitted onto the input shaft 25.

A hollow two-part rotary case 26 is mounted on the end of the input shaft 25 and fixed to the input shaft 25 with bolts 29 . The rotary case 26 is provided with intermediate gears 30, 30 that mesh with the sun gear 27 and have the same number of teeth as the sun gear 27.
It is rotatably provided via 1.

The intermediate shaft 3 is mounted on the cam shaft 32 as a planting shaft.
A sun gear 27 that constantly meshes with the intermediate gear 30 on top of 1.
A planetary gear 33 having the same number of teeth is fitted through a support member which will be described later. These sun gear 27, intermediate gear 30, and planetary gear 33 are gears that are appropriately dimensionally eccentric from the center of rotation.

The camshaft is also attached to the rotary case 26 via a position adjustment member 34.

Further, a support member 35 is fitted to the camshaft 32,
A planting claw case 38 and the planetary gear 33 described above are fixed to this support member 35. Then, by adjusting the position adjustment member 34, the extrusion timing of the extrusion claw 36 is changed.

A bolt 37 fixes the planting claw case 38 to the support member 35, and is inserted into a bolt hole of the planting claw case 38.

A cam 39 is provided on the cam shaft 32, and a push rod 42 shown in FIG.
A spring 43 is installed at the intersection.
In contrast, there is a cushion rubber 54.

Therefore, the push arm 40 is energized by the spring 43 and cushioned against the planting claw case 38 by the cushion rubber 54. push arm 4
0 is also pivoted on an axle 63 and contacts the cam 39 at its end.

Reference numeral 44 shown in FIG. 2 is a planting claw, and 36 is the aforementioned pushing claw, which is pushed out by a push rod 42 driven by a push arm 40.
After pushing out, the push arm is pulled up while rising from the ground. In the rest position, the push arm is in a retracted position as shown in FIG.
Further, the cam position relative to the push arm at the stop position is at a position where the push arm is lifted and a brake is applied. Now, when the rotary case 26 as a rotating body rotates around its axis by the input shaft 25, the planting transmission case 8
On the other hand, as the rotary case 26 rotates, the intermediate gear 30 meshing with the non-rotatable sun gear 27 rotates in the same direction by the same rotation angle as the rotation angle of the rotary case 26 .

The planting claw case support member 35 that is interlocked with the intermediate gear 30 via the planetary gear 33 rotates in the direction opposite to the rotation direction of the rotary case 26 due to the rotation of the intermediate gear 30, so the planting claw case 38 serves as a planting rod. is the drive shaft 2 in a state facing the direction of the seedling stand.
5, and during this turning movement, when descending from top to bottom on the side facing the seedling platform 18, the tips of the planting claws 44 touch the seedling pine on the seedling platform. After dividing only one seedling,
At the lower limit of descent, the seedlings are planted in the field, and thereafter they rise above the field, and the push-out claws 36 push out the seedlings at the time of planting, so the seedlings are separated from the planting claws 44.

By the way, since the sun gear 24, the intermediate gear 30, and the planetary gear 33 are all eccentric gears, the closed loop of the movement locus of the claw tip is curved in one direction, and the other is a closed loop in the shape of an ellipse that is closer to a straight line. It is curved.

To attach a plurality of planting claws to the rotary case as described above, as shown in FIG. Although it is connected to the case 38 in the manner described above, B
Planting nail case 38 in row and planting nail case 38 in row A
are connected by connecting pipes 45 and 46, and the planting claw cases 38 of the B row and the planting claw cases 38 of the C row are connected by connecting pipes 47 and 48.

In addition, the planting claw case 38 and the bearing case 51 in the C row
is connected with connecting pipes 49 and 50, and the sun gear 2
The support shaft 5 provided in the bearing case 51 portion corresponding to 7
3 is supported via a bearing on a support frame 52 extending from the fuselage.

The camshaft 32 extends through and supports these connecting pipes.

Then, the cam 20 is set so that the planting claws 44 in the front planting claw case 38 shown in FIG. Two stopping points are provided for one rotation of the planting claw, and the push arm and cam are in the position described above at the stopping positions.

The pins 19 engage with the highest parts 20a and 20b of the cams in the clutch mechanism 1, so that the clutch claws 20c on the cam side 20 engage the clutch claws of the bevel gear 3. The clutch is becoming disconnected from the clutch.

Therefore, since either of the two planting claws per row can be stopped in front of the seedling removal opening, it is possible to check the adjustment of the amount of seedling scraping of one planting claw and then the adjustment of the other planting claw. As shown in FIG. 2, the rear planting claw after planting is completed can be stopped between the front position of the ground and the input shaft, and the push arm 42 of the planting claw 36 is moved to the raised state after planting is pushed out. The feature of this proposal is that it is configured to stop at .

(Effect of the invention) According to this technical means, the rear planting claw stops between the front position of the ground and the entrance shaft after planting is completed, and the push arm of the planting claw is pulled up after the planting is pushed out. Since the pusher arm is configured to stop in the raised position, the pusher arm may be pulled up while it is rising from the mud to the stop position, causing the planting nails and the pusher arm to become stuck. It can promote the removal of mud. Immediately after the stop clutch is disengaged, a braking force is generated due to the movement resistance between the cam and the push arm, which helps to quickly activate the fixed position stop.

[Brief explanation of the drawing]

Figure 1 is an overall view of the planting claw drive device equipped with the proposed device, Figure 2 is a side view of the rotary planting claw, and Figure 3 is a side view of the rotary planting claw.
Figures A and B are a partial front view and sectional view of the proposed device, Figure 4 is an overall view of the conventional upper stop device for planting claws, Figure 5 is a partial view of the same lever as above, and Figure 6 is a partial view of the unit clutch. be. 1... Planting clutch mechanism, 2... Intermediate shaft, 3...
...Bevel gear, 18...Lever, 19...Pin, 20
...Cam, 20a, 20b...The highest part of the cam.

Claims (1)

[Scope of utility model registration request] In a rotary case with a planetary gear mechanism that drives two rotary planting claws, after planting is completed, the rear planting claw stops between the near side of the ground and the input shaft, and the push arm of the planting claw stops. The fixed position of the planting claw is configured such that the fixed position stop cam in the upper stop device is configured to stop in the raised state after pushing out the planting claw, and there are two stopping points per one rotation of the planting claw. Stop device.