JPS6352810A - Push cam in planting arm - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a planting arm, in particular, two
It concerns a push cam in a planting arm with three or more claws.

(Prior art) A planting arm in which the extrusion claw of the planting claw can be opened and closed relative to the fixed claw by the action of a push rod using a push cam is equipped with a button lever that pushes out the push-out claw, The cam lever and cam for swinging are located inside the case of the planting arm.

The cam shape of the push cam that pulls up the push rod is a cam shape that slowly pulls up the push rod.

(Problems to be Solved by the Invention) According to the above-described planting arm, since the push rod is pushed out by the push cam, the torque fluctuation caused by the push cam is large, and one planting arm holds the seedlings. Sometimes, when the push rod of the other planting arm performs a pulling operation, rotational fluctuations in the planting arm axis or play in the rotary case adversely affect the planting posture. Among these, the torque fluctuation due to the start and end of pulling is the worst. Moreover, if the push cam is shaped like a cam that slowly pulls up the plant, the lifting action will be interrupted, which will further adversely affect the planting posture.

(Means for Solving the Problems) Therefore, the technical problem of the present invention is to provide a push cam in the planting arm that does not adversely affect the planting posture, and to solve this technical problem. The technical means of the present invention is to provide a planting arm in which an extruding claw of a planting claw can be opened and closed with respect to a fixed claw by the action of a push rod by a push cam, and a push rod lifting shape of the push cam. The push rod is formed in a two-stage cam shape that starts pulling up a little early and then pulls it up slowly.

(Effect of the invention) According to this technical means, the push rod is pulled up quickly in the early stage and slowly in the middle and late stages, so that the seedlings can be planted quickly. In addition, at the beginning of pulling the push rod of one planting arm, the other planting arm is in the seedling guide, and on the other hand, when the push rod of one planting arm is finished being pulled up, the other planting arm is in the field. If the cam shape is formed as is done when the seedlings are planted, stable planting will occur.

In other words, the other arm is relatively unaffected (within the seedling guide and in the soil) during the period when the torque fluctuation caused by the push cam is the greatest, so stable planting can be performed.

In addition, since the push rod is pulled up quickly at the initial stage, self-locking between the push cam and the bushing lever is prevented, and damage to the planting arm can also be prevented (Example) The implementation shown in the drawings below Let's discuss an example.

In FIGS. 3 and 4 showing other planting arms before the present invention, the sprocket from the transverse gear case of the seedling stand (not shown) and the sprocket (3) of the drive shaft (2) in the drive chain case (1) are shown. ) and the drive shaft (
2) is driven.

A drive arm (4) is directly connected to this drive shaft (2),
A cam drive shaft (6) is stretched between the drive arm (4) and the rotary case (5).

The rotary case (5) has a sun gear (8) fitted on the shaft (7), with which the intermediate gears (10) (10) of the intermediate shafts (9) (9) mesh, and further the shaft (11011
) (11) are in mesh with the planetary gears (12) (12).

The shaft (11) (11) of the planetary gear (12) (12) is fixed to the leftmost planting arm (13R) (13R'), and the rightmost planting arm (13R) (13R') near the drive arm (4). The arm (13L) (13L') is the drive arm (
4) is supported by a cam drive shaft (6).

The central planting arm (13S) (133') is attached to the connecting pipe (14) (14) together with the left and right planting arms. (15) in FIG. 4 is a sun gear phase adjusting member, which is fixed to a frame (35) on which the drive chain case (1) is located.

Next, to explain each planting arm, in FIG. 6, a fixed claw (16) is attached to the case (40), and a push rod (18) that pushes out the pushing claw (17) is attached to the case (40).
reciprocates along the guide (19).

The receiver (20) of the push rod (18) has a case (
13) is in contact with the spring (21) supported within, and constantly urges the push-out claw (17) in the push-out direction.

The bushing lever (22) that engages with the groove (20a) of the bushing (20) swings about the shaft (23), but the cam lever (24) of the bushing lever (22)
5), the bushing lever (22) is moved backward against the spring (21).

Therefore, when the planting arm (13) rotates with respect to the cam (25) of the cam drive shaft (6), the cam lever (24
) is swung by the cam (25), causing the push rod (18) to reciprocate via the bush lever (22).

Thus, rotation of the drive arm (4) rotates the rotary case (5) via the cam drive shaft (6), causing the planting arm (13) to rotate according to a closed loop curve.

As described above, the drive arm (4) and rotary case (5)
The cam drive shaft (6) is stretched between the cam drive shaft (6) and the cam drive shaft (6).
The rotary case (5) can be rotated by the drive arm (4) via the rotary case (5).

Intermediate gear (10) in rotary case (5) (
10) has the same number of teeth as the sun gear (8), and the planetary gear also has the same number of teeth as the sun gear (8), so when the rotary case (5) rotates on the cam drive shaft (6), the frame (35) is an intermediate gear (10) that meshes with a non-rotatable sun gear (8). (10) is a rotary case (5)
As it rotates, it rotates in the same direction by the same rotation angle as that rotation.

This intermediate gear (10) (10) has a planetary gear (12)
(12) Interlocking planetary gear shaft (11) (1
1) is due to the rotation of the intermediate gear (10) (10),
Since the rotation direction of the rotary case (5) is opposite to the rotation direction of the rotary case (5), the planting arm (13) directly connected to the planetary gear shaft (11) (11) is placed on the drive shaft ( 2), and during this turning movement, when descending from top to bottom on the side facing the seedling stand, the tips of the planting claws will move away from the seedling cloak on the seedling stand. After dividing a single seedling, the seedling is planted in the field at the lower limit of its descent.

Since the sun gear (8), intermediate gear (10), and planetary gear (12) are all eccentric as shown in Figure 7, the closed loop of the movement trajectory of the claw tip is more curved in one direction, and more curved in the other. The result is an elliptical closed-loop curve that is close to a straight line.

In the multi-planting arm as described above, the camshaft (6) is taken out from the rotary case (5) or the drive arm (4), and the planting arm (13) is swung around the camshaft (6). Each planting arm (13) is provided with a cam (25), a bush lever (22), and a cam lever (24).

In addition, the flange (26) fixed to the shaft (11) has a
The flange (27) of the planting arm (13) is connected to the bolt (2).
8), and the flanges (27) of each planting arm (13) are fixed to the flanges (29) at both ends of the connecting pipe (14) with bolts (28).

In addition, the shaft cylinder (30) on the drive arm (4) side also has a flange (
31), and the flange (
27) are fixed with bolts (28).

The cam drive shaft (6) supports the planting arm via the bearing (a), and the shaft cylinder (30) supports the cam shaft (6) via the bearing (b).
) is supported.

By the way, according to the rotary planting arm as described above, since the push rod is pushed out by the push cam, the torque fluctuation due to the push cam is large.

If one planting arm is holding seedlings and the push rod of the other planting arm performs a pulling operation, rotational fluctuations of the planting arm shaft (cam drive shaft) or play within the rotary case may occur. If this occurs, it will have a negative effect on the planting posture. Among these, the torque fluctuation due to the start and end of pulling is the worst.

Therefore, in the present invention, the push rod lifting shape of the push cam is made into a two-stage cam shape that pulls up the push rod a little quickly at the beginning of pulling up and then slowly pulls it up. Because it is pulled up early and pulled up slowly in the middle and late stages, seedlings can be planted quickly. More stable planting can be achieved by locating the period when the torque fluctuation is greatest in the seedling guide and in the soil, where the other planting arm is relatively less affected.

Figure 1 shows the push cam, (G) (C
) is a cam surface that acts to push the push rod, and (D), (E), and (F) are surfaces that act to pull it up.

In (D), a cam surface that pulls up quickly is formed, and in (E), a cam surface that pulls up slowly is formed. Also, (G) shows the extrusion start cam surface.

In the above cam, the cam rotates in the direction of the arrow,
If the planting arm is fixed, the tip of the planting arm will draw a static trajectory as shown in Figure 2.

The left side of the figure shows the moving trajectory.

In Fig. 2, if A is the start of pulling up the push rod, the other planting arm is in the seedling guide (A'') in the 180° opposite area, and B is the end of lifting the push rod. It is preferable that the 180° opposite section has push cam timing to perform each push-pull operation of the push rod so that it is in the soil (B) of the other planting arm.

The push cam (25) may be attached to the cam drive shaft (6) so that male and female cams can be fitted on a reference line (H) passing through the punch mark (39) as shown.

That is, the fitting hole (36) of the cam (25) has a chevron-shaped projection (38), and the cam drive shaft (6) has a chevron-shaped projection (
An embedment (37) with a 7-shaped cross section is formed into which 38) fits.

However, the direction of the cam ()I) is A as shown in Figure 7.
It is the same as the eccentric direction at Z (reference position) and is fixed with respect to the rotary case.

The present invention can also be applied to crank-type planting arms other than rotary-type planting arms.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the device of the present invention, in which (a) shows the shape of the cam, and (b) shows the shape of the drive shaft. FIG. 2 is a trajectory diagram of the planting arm in the present invention. Figure 4 is a cross-sectional view of the multiple planting arm. Figure 5 is an explanatory diagram showing the relationship between the planting arm and the rotary case. Figure 6 is a cutaway front view of the planting arm. It is an explanatory view showing a planting locus. (4)... Drive arm (5)... Rotary case (6)...
...Cam drive shaft (10) ...Intermediate gear (11) ...Planetary gear shaft (13) ...Planting arm (14) ...Connection Pipe (16)...Fixing claw (17)...Pushing claw (18)...Push rod (21)...
... Spring (22) ... Bush lever (23) ... Bush lever shaft (24)...
...Cam lever (25) ...Cam (37) ...Embedded (38) ...Chevron protrusion

Claims (1)

[Claims] In a planting arm in which the extruding claw of the planting claw can be opened and closed relative to the fixed claw by the action of a push rod using a push cam, the shape of the push rod of the push cam is such that the push rod is pulled up only slightly when the push rod starts to be pulled up. A push cam for a planting arm characterized by a two-stage cam shape that pulls up quickly and then slowly pulls up.