JPH035217Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a clutch device in a so-called multi-row rice transplanter that simultaneously plants seedlings along a plurality of rows.

In a multi-row rice transplanter, multiple planting transmission cases are attached to the seedling planting device attached to the traveling body, and the seedling claws provided for each planting transmission case are connected to a seedling platform that can be moved left and right. While the structure is configured to swing vertically between the seedling take-out port and the field area, each planting transmission case is provided with a unit clutch that connects and disconnects the power transmission to the seedling claws, so that the seedlings can be moved up and down between the seedling extraction port and the field. When planting seedlings with a reduced number of rows, this is turned on and off by the appropriate number of rows. In this case, when the unit clutch is turned OFF,
If the seedling planting claws do not stop at the so-called upper position above the seedling take-out opening for the seedling platform, it will get in the way of the left and right movement of the seedling platform, and it will be difficult to hold the unit clutch again.
When turned ON, if the phase of the vertical swing between the seedling planting claw at the relevant location and the seedling planting claws of other planting transmission cases is out of phase, it becomes impossible to synchronize the timing with the lateral movement of the seedling platform.

Therefore, in the present invention, the power transmission wheel for the seedling planting claw is loosely fitted into the power transmission shaft in each planting transmission case along the axis of the power transmission shaft so as not to be retractable, and also meshes with the side surface thereof. The energized unit clutch is fitted so that it can slide freely only in the axial direction, and a pin that is rotatably operated from outside the case is inserted into each of the planting transmission cases, and the tip of the pin is inserted into the planting transmission case. A protrusion is provided on the unit clutch, and the protrusion faces between one side end face of the power transmission wheel and one side end face of the unit clutch, and by rotating the pin at an appropriate angle, the clutch is slid backward and the power transmission By providing a recess on one side end surface of the ring with which the projection engages, the seedling planting claw can be stopped at the top for each planting transmission case, and the structure of the unit clutch for this purpose is simple and durable. This is what we are trying to do.

The present invention will be explained below based on an example in which the present invention is applied to a riding-type rice transplanter for later planting. It consists of two front wheels 3, 3 and two rear wheels 5, 5 attached to the lower surface of the rear via chain cases 4, 4, and a control seat 6 and a steering handle 7 are provided on the upper surface of the vehicle body frame 2. The engine 8 on the front upper surface of the vehicle drives the wheels 3 and 5 to move forward.

Reference numeral 9 indicates a seedling planting device which is attached to the rear of the traveling body 1 so as to be vertically movable via a parallel link mechanism 10 consisting of one top link and two lower links. Case 11, pipe-shaped support members 12 on both left and right sides of the transmission case 11.
Planted transmission cases 13, 13', 13 installed at appropriate intervals in the lateral direction via and a seedling stand 16 which is slidable from side to side and whose upper end approaches the traveling body 1, and each planting transmission case 1
3, 13 rear end left and right sides and planting transmission case 13'
On one side, a planting mechanism 17 each having a seedling planting claw 19 at its tip is provided, and each seedling planting claw 19 swings up and down between the seedling takeout port at the lower end of the seedling platform 16 and the field surface. is configured to do so. Further, a hydraulic cylinder 18 is provided between the traveling vehicle body 1 and the parallel link mechanism 10 for raising and lowering the seedling planting device 9 with respect to the field.

Inside the transmission case 11, there is an input shaft 3 to which power is transmitted from the traveling body 1 side via a telescopic shaft 29.
0 parallel to the traveling direction of the traveling body 1, and a drive shaft 33 to which power is transmitted from the input shaft 30 via a bevel gear pair 31 and a clutch 32, for reciprocating and transversely feeding the seedling platform 16 left and right. A transverse feed shaft 35 having a reciprocating thread groove 34 is pivotally supported in a direction perpendicular to the traveling direction of the traveling body 1, and a gear type transmission mechanism 36 is provided between the drive shaft 33 and the transverse feed shaft 35. .

Further, inside the transmission case 11, a cross-feeding rod 38 is provided so as to be slidably penetrated in parallel with the cross-feeding shaft 35, and has both ends brought into contact with the back surface of the seedling stand 16 via a bracket 37. By engaging the boat-shaped key 39 fixed on the feed rod 38 with the reciprocating screw groove 34 of the cross-feeding shaft 35, the seedling platform 16 is reciprocated horizontally to the left and right as the cross-feeding shaft 35 rotates. There is.

A pair of left and right hollow cams 41, 41 are fixed to a longitudinal drive shaft 40 rotatably supported on the outer surface of one side of the transmission case 11, separated by a lateral feed distance of the seedling platform 16. A vertical feed shaft 42 is longitudinally supported in the left and right directions at the bottom of the back surface, and a feed cam 43 is provided on the vertical feed shaft 42 so that the vertical feed shaft 42 is intermittently rotated one pitch at a time in the same direction only by movement in one direction. is provided, and one of the hollow cams 41, 41 abuts and rotates the feed cam 43 at the left and right ends of the horizontal feed of the seedling table 16, thereby intermittently rotating the vertical feed shaft 42. The seedling pine on the seedling stand 16 is vertically fed downward using a ratchet wheel 44 etc. attached to the seedling stand 16.

Pipe-shaped support member 1 in the seedling planting device 9
An intermediate pawl shaft 45 is inserted and supported in 2, 12, and the intermediate pawl shaft 45 is connected to a transmission shaft 52 provided at the base of each planting transmission case 13, 13'. By transmitting power to each planting mechanism 17 via the chain 47 from the sprocket 46, which is a power transmission wheel loosely fitted on the top, the seedling planting claws 19 of each planting mechanism 17 are rotated per rotation of the intermediate claw shaft 45. The transmission case 1 is configured to swing up and down once.
1, chain sprockets 48, 4 having the same number of teeth are disposed on the intermediate pawl shaft 45 and on the longitudinal drive shaft 40.
9 and the sprocket 50 of the drive shaft 33, so that the intermediate pawl shaft 45 and the longitudinal drive shaft 40 rotate at the same speed.

On one side end surface of one side large diameter flange 53 of each sprocket 46 that is loosely fitted to the transmission shaft 52 in each of the planted transmission cases 13, 13', there are two arcuate meshing recesses at positions closer to the inner diameter thereof. 54, 54 are provided, and one engagement recess 57 into which a tip projection 56 of a pin 55, which will be described later, can be fitted is formed at a position closer to the outer diameter. Further, the end face on the opposite side is brought into contact with a bearing of the transmission shaft 52, so that at least the sprocket 46 itself does not move back.

Reference numeral 58 denotes a unit clutch for turning on/off power transmission from the driving side transmission shaft 52 to the driven side power transmission wheel sprocket 46, and the large diameter flange 5 of the unit clutch 58
9 facing the flange 53 of the sprocket 46, and the meshing recess 5 is located at a position near the inner diameter of the sprocket 46.
Two meshing protrusions 60, 60 that mesh with 4, 54
, and the unit clutch 58 is connected to the transmission shaft 5.
2, such as by spline engagement with the transmission shaft 52, so as to be non-rotatable and slidable only in the axial direction, and biased by a spring 61. The axis of each pin 55 is aligned with the transmission shaft 52.
The pins 55 are arranged so as to be approximately perpendicular to the axis and are attached to each planting transmission case 13, 13' so as to be rotatable around the axis. The pin 55 is formed on a protrusion 56 that is eccentric by e, and is disposed so as to face between the flanges 53 and 59 of the unit clutch 58 and the sprocket 46, and the pin 55 is formed at an appropriate angle. By rotating θ, the tip protrusion 5
At step 6, the unit clutch 53 is released from the sprocket 46 against the force of the spring 54 to disengage the two, and when the protrusion 56 is in phase with the recess 57 on the end surface of one side of the flange 53 on the sprocket 46 side, it is engaged there. At the same time, the rotation of the sprocket 46 is stopped, and this stop position is set in advance so that each seedling planting claw 19 in each planting transmission case 13, 13' stops at approximately the top position in its vertical swing. Set it.

The base end of the pin 55 is attached to each planting transmission case 13,
13' toward the rear surface of the seedling stand 16, and is mounted between the lever 62 at the proximal end of the pin 55 in each unit clutch and the guide plate 63, the protrusion 56 at the tip of the pin 55 is attached to both flanges. 53 and 59 are biased in a direction that does not separate them,
An operating lever (not shown) mounted near the pilot seat 6 or the like and a lever 62 at the base end of the pin 55 are connected by a wire 65, and the pin 55 can be rotated against the force of the torsion spring 64. Configure it as follows.

Note that the position of the protrusion 56 is eccentric to the axis of the pin 55, and when the unit clutch is engaged, the protrusion 56 is located between the flanges 53 and 59.
By arranging the pin 55 such that the side surface facing the sprocket 46 side flange 53 is more eccentric than the side surface facing the clutch side flange 59, the pin 55 rotates around the axis as the drive side flange 59 rotates. This prevents the clutch from becoming unintentionally disengaged.

With this configuration, floats 14, 1 are placed in the field.
When the seedling planting device 9 is lowered so that the seedlings 5 and 15 are in contact with each other, the traveling body 1 is moved forward, and all unit clutches 53 are turned on to transmit power to the seedling planting device 9, the planting mechanism 17 moves up and down at the same time. In this embodiment, seedlings can be planted along five rows (see Fig. 5). When you want to reduce the number of seedling rows at a certain point, you can turn the operating lever at a predetermined location and hold the unit clutch 58 at that position in the OFF position (see Figure 6). Only the seedling planting claws can be stopped, and since each seedling planting claw 19 stops at the upper position, the seedling loading stand 16 and the seedling planting claws 19 are not stopped in contact with the seedling take-out opening or the field surface. There is no risk of damage.

According to the present invention, in a rice transplanter in which a plurality of planting transmission cases with seedling planting claws are arranged in parallel on a traveling machine body, a power transmission wheel in each of the planting transmission cases has a power transmission wheel that connects to the seedling planting claws. A power transmission wheel is loosely fitted along the axis of the power transmission shaft so as not to be retractable, and a unit clutch which is biased to engage with the side surface thereof is fitted so as to be slidable only in the axial direction. A pin that is rotatably operated from outside the case is inserted into the planting transmission case, and a projection is provided at the tip of the pin, and the projection is connected to one end surface of the power transmission wheel and one end surface of the unit clutch. The clutch is caused to slide backward by turning the pin at an appropriate angle, and a recess is provided in one end surface of the power transmission wheel in which the protrusion engages. When the pin is rotated to disengage the clutch, the clutch engaged with the driving side transmission shaft is moved backward, but the driven side power transmission wheel is not moved backward, so the chain on the driven side is There is no left-right movement along the axis of the shaft, and no twisting of the rotating surface occurs. In addition, when the power transmission wheel stops with the clutch disengaged, the power transmission wheel is pressed by the protrusion of the pin, so the upper stop position of the seedling claw does not shift, and the clutch It is possible to eliminate the double meshing state between the meshing and the engagement with the recess for upper stop, and the durability of the unit clutch can also be improved. Furthermore, since it is only necessary to align the seedling claw to the uppermost position while the power transmission wheel is stopped, there is also the effect that the alignment work is simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a plan view, and Fig. 3 is a side view of the riding rice transplanter.
4 is a sectional view of the main part of FIG. 3, FIG. 5 is an explanatory diagram showing the clutch engaged state, FIG. 6 is an explanatory diagram of the clutch disengaged state, and FIG. Figure 6 is a - line side view, Figure 8 is the 6th side view.
The - line side view of the figure, Figure 9 is the - of Figure 7.
10 is a sectional view taken along the - line in FIG. 7, FIG. 11 is a sectional view taken along the - line in FIG. 8,
Figure 12 is a sectional view taken along the line -1 in Figure 8.
FIG. 3 is a sectional view taken along the - line in FIG. DESCRIPTION OF SYMBOLS 1... Traveling machine body, 9... Seedling planting device, 10... Parallel link mechanism, 13... Planting transmission case, 16...
... Seedling stand, 17... Planting mechanism, 19... Seedling planting claw,
46...Sprocket, 52...Transmission shaft, 58...
...unit clutch, 53, 59...flange,
55...pin, 56...protrusion, 65...wire.

Claims (1)

[Scope of utility model registration request] In a rice transplanter in which a plurality of planting transmission cases with seedling planting claws are arranged in parallel on a traveling body, a power transmission shaft in each of the planting transmission cases has a power transmission wheel for transmitting power to the seedling planting claws. A unit clutch, which is loosely fitted along the axis of the shaft and is biased so as to mesh with the side surface thereof, is fitted so as to be slidable only in the axial direction. A pin that is rotatably operated from outside the case is inserted, a projection is provided at the tip of the pin, and the projection is exposed between one end surface of the power transmission wheel and one end surface of the unit clutch. . A clutch device for a multi-row rice transplanter, wherein the clutch is slid backward by rotation of a pin at an appropriate angle, and a recess is provided in one end surface of the power transmission wheel to which the projection engages.