JPH0368645B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a power transmission device for transmitting the seedling planting tool of a rice transplanter. This invention relates to a power transmission device in which a plurality of seedling planting tools circulate and act on the seedling dividing opening on the side of a seedling tank to perform seedling planting in order to speed up the planting work.

(Prior art) Conventionally, as seen in Japanese Patent Application Laid-open No. 52-69724,
In some multi-row rice transplanters that divide and plant seedlings from a plurality of seedling tanks, each seedling planting tool is cut at once by operating a fixed position stop clutch. When each of the seedling planting tools stops at a desired fixed position, the seedling planting tools on the left and right sides no longer stop with the seedling dividing opening sandwiched in a side view. However, the seedling planting tool whose power transmission was cut off by this fixed position stop clutch was a single seedling planting tool that was connected to the seedling dividing opening of the seedling tank.

Conventionally, all fixed-position stopping clutches for stopping the seedling planting tool in a fixed position have a structure in which the clutch is disengaged or engaged at a single point during rotation. Moreover, conventionally, multiple seedling planting tools circulate and act on one seedling dividing opening of a seedling tank.
For example, as disclosed in Japanese Patent Publication No. 49-17806, it is known that even such a rice transplanter for high-speed seedling planting has a structure in which the transmission rotation is cut off only at one point during rotation. .

Furthermore, there is a conventionally known device that stops the seedling planting tool for each planting row, but in this method, multiple seedling planting devices act on one seedling splitting opening and seedlings can be planted at high speed. Those with a structure that could be implanted were designed so that the transmission could only be stopped at one point during rotation.

(Problems to be Solved by the Invention) In the prior art, even if the fixed position stop clutch is operated to the OFF position, the problem is that the stop occurs only after several seedlings have been planted before the stop occurs. However, if the seedling planting clutch was operated both fully and swiveled at the same time, the planted seedling rows would be distorted and the seedlings would scatter outwards, making it impossible to properly plant the seedlings. In addition, a riding-type rice transplanter has a problem in that floating seedlings occur when the rice transplanter section is raised at the same time as the clutch is released.

(Means for Solving the Problems) In order to solve the problems of the prior art, the first invention took the following technical measures.

That is, the seedling tanks 19a are arranged side by side in the left and right directions,
Seedling planting tool 3 for dividing and planting seedlings from 19b...
4, 34... are the seedling dividing ports 21a and 2 of each seedling tank.
The seedling planting device is constructed such that at least two or more seedlings are circulated around each of the seedling dividing ports 21a, 2.
Seedling planting tools groups A, B, corresponding to 1b...
In the transmission configuration of the seedling planting device in which power transmission of C, D, and E is provided in at least two separate systems from a single drive shaft 43, the all seedling planting device group A
A seedling planting tool in which the main seedling planting clutch 45 that turns on and off the power transmission of ~E is configured as a fixed position stopping type clutch, and this fixed position stopping position corresponds to a single seedling dividing opening. The power transmission device of the multi-row type seedling planting device is configured so as to correspond to the number of plants.

Further, in the second invention, the seedling planting tools 34, 34, which divide and plant seedlings from the seedling tanks 19a, 19b, which are arranged side by side in the left and right direction, are arranged in the seedling dividing opening 21a of each seedling tank, The seedling planting device groups A, B, C, D, corresponding to each of the seedling dividing openings 21a, 21b, etc. are configured as a seedling planting device in which at least two or more of them circulate around the seedling planting device 21b... In the transmission configuration of the seedling planting device in which the power transmission of E is provided separately in at least two lines from a single drive shaft 43 part, the power transmission of all the seedling planting tool groups A to E is included. ,
The main seedling planting clutch 45 to be cut is configured as a fixed position stopping diameter clutch, and the fixed position stopping position is configured to correspond to the number of seedling planting tools corresponding to a single seedling dividing opening, and further , seedling planting equipment groups A to E
The power transmission for each group of one or more groups is set to be turned on and off by an auxiliary seedling planting clutch 56 that stops at a fixed position. The structure of the power transmission device of the multi-row type seedling planting device is configured to correspond to the number of seedling planting tools corresponding to the dividing openings.

(Example) First, the example of the first invention is shown in Figures 1 to 5.
This will be explained based on the diagram.

1 is a passenger towing vehicle, 2 is a pair of left and right front wheels, 3 is a pair of left and right rear wheels, 4 is an engine, 5 is a control seat, and 6 is a control handle. 7 is a control frame, 8 is a main transmission case, and the power is transmitted from the engine 4 to the internal transmission, which then connects to the front wheels 2.
The power is transmitted to the rear wheels 3 through drive shafts 9 and 10, and the power is transmitted through a PTO shaft 11 and a transmission shaft 12 to a rice transplanter 13, which will be described later.

Reference numeral 14 denotes a planting clutch lever, by which a main seedling planting clutch, which will be described later, is operated to turn on and off.

Reference numeral 15 denotes an elevating link mechanism, which is moved up and down by a hydraulic cylinder device 16 to move the hitch 17 up and down.

Reference numeral 18 denotes a planting transmission case, which is attached to the hitch 17.

Reference numeral 19 denotes a seedling tank, which is tilted and supported above the planting transmission case 18 so that the front side faces upward, and is provided so as to be moved left and right by a left and right reciprocating lateral movement device inside the planting transmission case 18. . This seedling tank 19 has partitions 2 in the left and right directions.
A plurality of seedling tanks 19a, 19b, 19c, 19 are divided into predetermined widths by 0, 20...
d, 19e.

Reference numeral 21 denotes a seedling receiving plate, which is provided in a substantially L-shape when viewed from the side, and extends horizontally along the lower end side of the seedling tank 19. Seedling dividing ports 21a, 21b, 21c, 21d, and 21e are provided through which the seedlings 19a to 19e can be divided.

Reference numerals 22a, 22b, 22c, 22d, and 22e are rotating cases, and vertical transmission cases 18a, 18b, and 18c that protrude and branch rearward from the planting transmission case 18 at a predetermined interval in the left and right direction. Its front and rear intermediate portions are wedged together by a planting shaft 23.

24 is a gear wedged to the planting shaft 23;
5 and 26 are counter gears, and 27 is an input sprocket.

28 is a bearing metal, and the vertical transmission case 18a, 1
8b, 18c, and bears the planting shaft 23 via a bearing, and this shaft 23
The outer end hole 28a through which the shaft is inserted is made eccentric with respect to the shaft 23.

Reference numeral 29 denotes a sun gear, which is inserted into the hole 28a of the bearing metal 28 and is provided integrally with a boss portion that is prevented from rotating, and this gear 29 is eccentric with respect to the drive shaft 23. ing.

Counter planetary gears 30, 30 are always engaged with the sun gear 29 rotatably supported within the rotating cases 22a to 22e.

31 is a planetary gear, and the rotating case 22a~
22e, and meshes with the counter planetary gears 30, 30. One end side of the bearing boss 31a of this planetary gear 31 protrudes outward from the rotating case, and furthermore, this boss portion 3
The shaft core portion 1a is hollow so that the shaft can be inserted therethrough.

A camshaft 32 is inserted into a hole in the bearing boss portion 31a, and one end thereof is connected to the rotating cases 22a to 22e.
It is fixed with a rotation prevention plate 33 on the inside and outside of the bearing boss 31a, and the other end protrudes outward beyond the bearing boss 31a.

34 is a seedling planting tool, which includes a planting case 35 and a cam 3.
6. It is made up of an interlocking rod 37, an extrusion body 38, a seedling separation claw 39, etc. And this planting case 35
is fitted onto the outer periphery of the boss portion 31a that is integrated with the planetary gear 31, and is provided so that it can be moved and fixed somewhat in the axial direction of the boss with a knock pin 40, and when installed, it can rotate integrally with the boss portion 31a. It is set up like this.

The cam 36 is fixedly attached to the cam shaft 32 so as to rotate together with the cam shaft 32.

The interlocking rod 37 is rotatably received by the planting case 35 with a pin 41 at the front and rear intermediate portions, and a cam 36 at the base side.
The tip side is formed into a fork shape.

Reference numeral 38 denotes an extruded body, which is supported by a bearing on the tip side of the planting case 35 so as to be slidable in the vertical direction, and its lower end protrudes outside the case, and this lower end is formed into a seedling extrusion piece 38a (fork shape). , the outer periphery of the upper end side is partially cut into an oval shape, and the interlocking rod 37 is attached here.
The tip of the fork is engaged. 42 is a spring.

The seedling separation claw 39 is a claw having an ∩ shape when viewed from the front, and is detachably attached to the tip of the planting case 35.

As mentioned above, the seedling planting tools are in the rotating cases 22a to 22.
Two of them are attached to each of the containers 1 and 2, and the clutch is rotated so as to be operated while drawing a long planting path 1 in the vertical direction when viewed from the side. and,
Two seedling planting tools installed in a single rotating case are considered as one group, and in the example shown, they are A, B, C, D,
It is made up of E's seedling planting tools group.

43 is a drive shaft, which is installed in the planting transmission case 18 so as to be transmitted and rotated, extending in the horizontal direction;
Drive sprockets 44, 44, 44 are fixed to the root portions of the longitudinal transmission cases 18a, 18b, 18c, and are connected to the input sprocket 2 through a chain.
7, 27... are provided so as to rotate and transmit power to the planting drive shaft 23 side.

Reference numeral 45 designates a main seedling planting tool clutch, in which a drive clutch gear 46 with a clutch pawl that is transmitted and rotated from the prime mover side is freely rotatably attached to the drive shaft 43, and a clutch pawl and a fixed position stop cam 47a are attached to the drive clutch gear 46. The driven clutch body 47 is connected to the drive shaft 43
A clutch pin 4 is provided so as to be movable in a wedged state and is elastically engaged toward the drive clutch gear 46 side by a spring 48, and is slidably provided on the planting transmission case 18.
9 is configured to be removably connected to the fixed position stop cam 47a, and when the pin 49 is brought into contact with the cam surface RO,
In response to the rotational force, the driven clutch body 47 resists the spring 48 and the clutch pawl disengages, thereby stopping the rotation of the drive shaft 43. In the illustrated example, the number of fixed position stop cams 47a is divided into two on the outer peripheral surface of the rotation, and the rotation cases 22a, 22b, . . .
The number of seedling planting tools 34 that can be attached to one of the... is two.

It goes without saying that if three seedling planting tools 34 are provided in the rotating case, the number of fixed position stop cams 47a will be three.

A clutch wire 50 connects the planting clutch lever 14 and the clutch pin 49.

In the illustrated example, the main planting clutch 45 is provided inside the planting transmission case 18, but this is installed in the main planting clutch 8.
PTO installed inside to transmit power to the rice transplanter 13 side
Of course, it is also possible to adopt a configuration in which the rotation of the shaft 11 is stopped at a fixed position.

In the figure, 51 is a ground leveling float in the center, and 52 is a leveling float on both left and right sides.

To explain the operation of the above example, each seedling tank 19a~
When seedlings are placed on the 19e and each part is rotated by the engine 4, the passenger tractor 1 is propelled by the rotation of the front wheels 2 and rear wheels 3, and the rice transplanter 13 moves to the soil leveling float 51,
Part of the load was received by 52 and it was towed.
Power is transmitted from the PTO shaft 11 via the transmission shaft 12 to the input shaft in the planting transmission case 18 from the main transmission case 8 side. And main planting clutch 4
A drive shaft 43 is transmitted and rotated via the drive shaft 43, and the planting shafts 23, 23, . . . are rotated from the drive shaft 43 via sprockets, chains, etc. Then, each of the rotating cases 22a to 22e rotates, and with the rotation, the counter planetary gears 30, 30 are planetarily rotated around the sun gear 29, and the planetary gears 31, 31 that engage with these are rotated. . Therefore, the planting case 35, which is integrally fixed to the planetary gears 31, 31, is connected to the rotating cases 22a to 22e.
The rotating cases 22a to 22e
Of course, the camshafts 32, 32 that are integrated with the gear 3
1, the planting case 35 is rotated relative to the cam 36 fixed to this camshaft. Therefore, the interlocking rod 37 is the cam 3.
6, the extrusion body 38 moves up and down.

Then, the tip side of the seedling separating claw 39 attached to the planting case 35 operates while drawing a planting trajectory A, and successively intervenes from above into the seedling dividing openings 21a to 21e of the seedling receiving plate 21, reciprocating from side to side. Moving seedling tank 19a
The seedlings in ~19e are divided into individual plants and planted on a field leveled by leveling floats 51 and 52. That is, when the seedling pushing body 38 is located above the planting case 35, the seedlings are separated from the seedling tank, and when the seedlings are pushed into the field, the cam 36 and the cam floor portion of the interlocking rod 37 are separated. When released, the spring 42 rapidly pushes the seedling into the soil.

In this embodiment, the rotary case 35 has two
Since two seedling planting tools 34 are attached, seedlings can be planted at high speed.

When temporarily stopping seedling planting, such as when turning, the planting clutch lever 14 is operated to push in the clutch pin 49 via the wire 50, and the cam surface of the fixed position stop cam 47a of the driven clutch body 47 is pressed. All you have to do is touch it. Then, the driven clutch body 47 moves against the spring 48, and the clutch pawl of the driven clutch body 47 is disengaged from the clutch pawl of the drive clutch gear 46, and the drive shaft 43 is moved at that position.
rotation stops.

At this time, since the fixed position stop cams 47a are provided in a number corresponding to the number of seedling planting tools 34 attached to one rotating case 35, when the planting clutch lever 14 is operated to the stop side, the Immediately, the seedling planting tool 34 is stopped and one rotating case 35 is opened.
Even though two seedling planting tools 34 are attached to the
This prevents unexpected situations such as splitting the seedlings from the seedling tank and planting them.

Next, the embodiment of the second invention is shown in FIGS. 1 to 5.
1 to 5 are the same except for the following structural parts, so the explanation will be omitted. That is, as shown in FIG. 6, this second invention
The planting shaft 23 installed at the rear end of a, 18b, 18c is divided into left and right parts to form 23a, 23b, and the planting shaft 23a, 23b is inserted into the axis of the planting shaft and rotated. They are joined by a freely adjustable intermediate pin shaft, and a clutch sprocket 53 having a single clutch pawl on the left and right sides in the same phase is provided.

Driven clutch bodies 54, 5 having the same structure as the main seedling planting clutch 45 are attached to the planting shafts 23a, 23b on both the left and right sides of the clutch sprocket 53.
5 are provided to constitute sub-seedling planting clutches 56, 56.

57a and 57b are subplant clutch pins.
And these sub-planting clutch pins 57a, 57b
... are five ridge clutch levers 58a, 58b provided on the upper back surface of the seedling tank 19...
are connected to the auxiliary seedling planting clutch 56, 59, . . .
56 is provided so that it can be turned on and off.
Furthermore, fixed position stop cams 54a, which are provided on the driven clutch bodies 54, 55 of this secondary seedling planting clutch 56,
Two 54a, 55a, 55a are provided in the same way as the main seedling planting clutch 45.

To explain the effect of the configuration in the above example, in general, when planting along the ridge, if the rice transplanter protrudes from the field when planting all the planting rows, or if there are unplanted plants, the final planting In the first stage of the planting process, planting of some rows is stopped to ensure that there are no unplanted plants.
That is, among the ridge clutch levers 58a, 58b..., appropriate one is operated to stop some of the seedling planting rows near the ridge edge, and the sub-planting clutch pins 57a, 57b... are operated. Push it in.
Then, in the same way as the main planting clutch 45 described above, the subsidiary seedling planting clutch 56 is disengaged at the fixed position, and the rotation case 2 of the seedling planting tool 34 is turned off.
2a, 22b... are stopped, and planting can be stopped.

At this time, since the secondary seedling planting clutch 56 is also provided with the same number of fixed position stopping positions as the main seedling planting clutch 45 as the seedling planting tools 34 attached to the rotating case, the secondary seedling planting The rotation of the seedling planting tool 34 is stopped almost simultaneously with the cutting operation of the clutch 56, thereby preventing an unexpected situation such as splitting the seedlings from the seedling tank and planting them after the stopping operation.

In addition, regarding the disengagement position of the main seedling planting clutch 45 or the auxiliary seedling planting clutch 56, each seedling planting tool 34, 3 of the rotating cases 22a, 22b...
If the engagement of the transmission gear and the engagement of the sprocket and chain are set so that the gears 4 are stopped after dividing the seedlings and planting them on the soil surface, when the clutches are operated to stop planting. It is extremely effective because the seedlings are not scattered in the field.

(Operation and Effect) Although high-speed seedling planting is possible in the first invention, when the main seedling planting clutch is disengaged, all the seedling planting tools are immediately stopped and the clutch cannot be disconnected. It is possible to prevent the situation where the seedlings are divided and planted from the seedling tank after the clutch has been disengaged, and especially when the clutch is in one position per revolution as in the past, it is possible to prevent the situation where the seedlings are separated from the seedling tank and planted. If the planting part is not raised until the planting part is raised, the seedlings will be split while the planting part is being raised, causing the seedlings to be scattered.This can be prevented.

The second invention is that in the case of fractional row planting, when cutting the secondary seedling planting clutch with an appropriate ridge clutch lever, it is immediately cut in the fixed position, even though the ridge clutch is cut. This has the effect of preventing a situation where one or two seedlings are planted there.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view of the main part, and Fig. 3 is a plan view of the main part.
The figure is a simplified slope view of the transmission mechanism, Figure 4 is a side sectional view of the main part, Figure 5 is a plan sectional view of the main part, Figure 6 is a partially cutaway plan view of the main part, and Figure 7 is the transmission mechanism. FIG. 3 is a simplified perspective view of the mechanism. Symbols in the figure, 19a to 19e are seedling tanks, 21a
21e is a seedling dividing opening, 34 is a seedling planting tool, 43 is a drive shaft, 45 is a main seedling planting clutch, 56 is a subsidiary seedling planting clutch, and A to E are seedling planting tool groups.

Claims (1)

[Claims] 1. Seedling tanks 19a, 19 arranged side by side in the left and right directions
b Seedling planting tool 34 for dividing and planting seedlings from...
34... are the seedling dividing ports 21a and 21b of each seedling tank.
The seedling planting device is configured such that at least two or more seedlings are circulated to...
Seedling planting tools groups A, B, C, corresponding to b...
In the transmission structure of the seedling planting device in which the power transmission of D and E is provided in at least two separate systems from a single drive shaft 43 part, all of the seedling planting tool groups A to E
The main seedling planting clutch 45 that turns on and off the power transmission is configured as a fixed position stop type clutch,
A power transmission device for a multi-row type seedling planting device configured such that the number of fixed position stopping points of the clutch 45 corresponds to the number of seedling planting tools corresponding to a single seedling dividing opening. 2 Seedling tanks 19a, 19 installed side by side in the left and right directions
b Seedling planting tool 34 for dividing and planting seedlings from...
34... are the seedling dividing ports 21a and 21b of each seedling tank.
The seedling planting device is configured such that at least two or more seedlings are circulated to...
Seedling planting tools groups A, B, C, corresponding to b...
In the transmission structure of the seedling planting device in which the power transmission of D and E is provided in at least two separate systems from a single drive shaft 43 part, all of the seedling planting tool groups A to E
The main seedling planting clutch 45 that turns on and off the power transmission is configured as a fixed position stop type clutch,
The clutch 45 is configured such that the number of fixed position stopping points corresponds to the number of seedling planting tools corresponding to a single seedling dividing opening, and further includes one of the seedling planting tool groups A to E;
Alternatively, the power transmission for each group can be carried out using a sub-seedling planting clutch 56 that stops at a fixed position.
The power of the double-row type seedling planting device is configured such that the number of fixed position stopping points of the clutch 56 corresponds to the number of seedling planting tools corresponding to a single seedling dividing opening. transmission device.