JPS5854765B2 - Ichiringatataueki - Google Patents

Description

[Detailed description of the invention] The present invention relates to a single-wheel rice transplanter.

In general, single-wheel rice transplanters have a light weight and can be easily steered, but have the disadvantage that the machine tends to tilt left and right and has poor straight-line performance.

As a means of solving this problem, it is conceivable to use, for example, balance weights to maintain the left-right balance of the aircraft, but this has the drawback of increasing the weight of the aircraft.

The purpose of the present invention is to maintain the left-right balance of the aircraft by rationally arranging necessary weight members without using weights, and as a result, to improve straight-line performance, and to reduce the planting time. The aim is to provide a single-wheel rice transplanter with improved functionality.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 and FIG. 2 show the overall view of the rice transplanter of the present invention, and the overall arrangement is configured as follows.

An engine A and a propulsion wheel B are arranged at front and rear positions in the center part in the left-right direction of the fuselage, and an engine deceleration part C and a driving force transmission part to the propulsion wheels B are arranged in front and rear positions in the side part of the machine in the left-right direction. A driving force transmission direction changing part F to the planting part E and a driving force transmitting part G to the planting part E are arranged at the front and back positions of the horizontally narrow side parts of the aircraft in the left-right direction. It is designed to maintain the balance between the left and right sides of the aircraft.

More specifically, a main transmission case 3 fixed to the engine case 2 is bridged at the tips of the left and right frames 1, 1, and a seedling stand 4 is attached to the rear ends of the pair of frames 1. A mission case 5 for reciprocating the seedling tray that reciprocates in the horizontal direction with a constant stroke is bridged, and a stay 5 extends from the rear wall of the driving mission case 5.
A supporting member 6a of the bundle 6 is attached to the mounting portion 1a of the main frame 1, and a transmission case 7 for planting is extended rearward on the rear wall of the mission case 5 for reciprocating the seedling tray. Seedling take-out portions 4a are formed at two locations on the left and right sides of the lower end of the seedling platform 4.

A mechanism 9 is used for planting by swinging the claws 8, 8 for planting one pair at a time along a constant circular rotation locus S passing through the 4b from above.
9.

A case 3a of an appropriate length into which a transmission shaft is inserted projects from the rear end of the main transmission case 3 toward the rear of the center of the machine body.
0 is pivotally connected in a backward cantilevered state, and a propulsion wheel B mounted on the free end of the wheel transmission case 10 is interlocked with the transmission shaft. A pair of left and right flows N1 and 11 are arranged to hold the mechanisms 9 and 9 at a constant height position on the mud surface.
The rear parts of 1 and 11 are pivotally connected to the bundle support member 6a via a connecting member, and the front parts are connected near the distal end side of the frame 1 via a link 12 having an elongated hole structure that allows relative movement as necessary. is linked to.

The rice transplanter of the present invention is configured as described above,
The structure of each part will be explained in detail below.

The three parts of the main transmission case are structured as shown in FIG.

That is, the output shaft 13 of the engine A rushes into the reduction gear case 14 in which the engine reduction section C is built, and the reduction gear 1
5, 16, and 17 to transmit power to the first intermediate transmission shaft 18, and an idle gear 19 is loosely inserted into the first intermediate transmission shaft 18, and a high/low speed changeover that is slidable only in the axial direction. The gear 20 is spline-fitted, and the idling gear 19 and the height/low speed change switching gear 20 have engaging portions 19a and 20 on their sides, respectively.
A is formed so that it can engage and disengage, and is configured to be able to change high and low speeds.

On the other hand, the second intermediate transmission shaft 21 includes a small-diameter gear 22 that constantly engages with the idle gear 19, and a high-low speed change gear 20.
A large-diameter gear 23 that engages and disengages with the sliding movement of is fixed, and a main clutch gear 24 is spline-fitted to the second intermediate transmission shaft 21, and a third intermediate transmission shaft that transmits driving force to the propulsion wheel B. 25 fixed gear 26 and the second intermediate transmission shaft 2
The transmission case 10 is configured to be able to engage with and separate from the side engagement portion 23a of the large diameter gear 23 of the transmission case 10.
It is configured to be able to transmit the driving force via a driving force transmitting section that has a chain 70 built therein.

An operating wire is attached to the shifter shaft 27 for operating the high/low speed change gear 20, and the operating bundle 6 is connected to the shifter shaft 27.
It is attached to the high/low speed switching operation lever 28 near the grip part.

Further, an actuating arm 30 is attached to the shift fork shaft 29 for actuating the main clutch gear 24, and a wire is attached to the actuating arm 30, which is then attached to an operating lever 31 near the grip portion of the steering bundle 6.

Furthermore, a bevel gear mechanism 32 is installed at the roadside portion of the second intermediate transmission shaft 21 as a driving force transmission direction changing portion F, and a safety clutch 33 is installed to cut off the transmission of driving force when the load on the planting portion E exceeds a certain level. is disposed on the upper side of the transmission shaft 34 that transmits the driving force to the section E, and the free end of the transmission shaft 21,
A bevel gear mechanism 32, a safety clutch 33, and an interstitial transmission mechanism to be described later are housed in the gear case Fa.

That is, in the middle part of the short shaft 35, the first ball safety clutch,
In order to provide the second clutch pieces 36 and 37, the first clutch pieces 36 located on the proximal end side are slidably slidable in the axial direction of the short shaft 35 and are fitted with a spline.
A coil spring 38 that presses from the base end side is provided with this short shaft 35 as a winding axis center.

On the other hand, the second clutch piece 37 is fitted to the short shaft 35 so as to be rotatable and slidable in the axial direction, and the tip side of the second clutch piece 37 is fitted with an adjustment nut 39 screwed onto the short shaft 35. In order to adjust the amount of compression of the coil spring 38, both clutch pieces 36 and 37 are moved in the axial direction when assembled, and the maximum transmitted torque can be adjusted.

Further, a rectangular internal fitting boss 40 is provided on the distal end side of the second clutch piece 37, and the square shaft 34 is removably externally fitted onto the boss 40.

Further, a passive gear 35a is attached to the base end of the short shaft 35, so that the engine output can be transmitted to the planting section E.

The front surface of the gear case Fa on the side where the passive gear 35a is present is open and normally closed with a lid Fb by bolts.When adjustment of the spacing is necessary, the lid Fb is removed and the passive gear 35a and the transmission gear 35b are connected. The construction is such that the operating speed of the planting claws 8, 8 can be changed by changing the rotational speed of the rectangular transmission shaft 34 by replacing it with one having an appropriate gear ratio.

Therefore, by rotating the rectangular transmission shaft 34, the driving force is transmitted to the planting part.
Both clutch pieces 3 by coil spring 38 in 3
This prevents damage to the claws by cutting off the torque transmission due to frictional force via the balls of 6.37.

Next, the driving structure of the planting section will be explained.

That is, as shown in FIG. 4, the transmission shaft 34 made of a rectangular tube is inserted into one of the left and right frames 1, 1, the bevel gear 41 is attached to the free end of the transmission shaft 34, and the bevel gear 41 is planted. The bevel gear 43 of the intermediate transmission shaft 42 is engaged with the bevel gear 43 of the intermediate transmission shaft 42. is inserted.

That is, the movable clutch piece 45 can move toward the clutch disengage side only when it assumes a certain rotational posture with respect to the check pin 46 provided on the clutch disengage side type.

On the other hand, for planting, the transmission case 5 transmits the driving force to the part E and drives the seedling tray 4 back and forth from side to side.The transmission case 5 includes a horizontal feed screw shaft 48 for horizontally moving the seedling tray, which has a threaded portion 47 approximately in its entire length. The shaft 48 is supported substantially in parallel above the intermediate transmission shaft 42, and this shaft 48 and the intermediate transmission shaft 42 are interlocked with each other via interlocking gears 49 and 50 at their ends.

Further, a cross-feeding shaft 53 is provided with a piece 52 provided with a follower 51 that fits into the threaded portion 47 and is externally fitted onto the threaded portion 5, and the upper part of this piece 52 is parallel to the threaded shaft 48 and is supported upwardly through the shaft. The transverse feed shaft 53 is fixed to the center of the transverse feed shaft 53 and moved from side to side by rotation of the screw shaft 48, and the seedling stand 4 fixed to the transverse feed shaft 53 is reciprocated with a constant stroke.

The lateral feed shaft 53 is connected to the screw shaft 4 at the lateral movement limit.
The fixed cam 55 provided at the end of the top 8 is intermittently rotated by contacting the cam 56 provided on the top 52, and this rotation causes the vertical seedling feed claws 57 on the lower side of the seedling tray 4 to place the seedlings. stand 4
The opening 4C... is interlocked so as to operate intermittently.

In addition, the seedling stand 4 itself is slidably guided at its lower end by a slide rail 54 fixed to the machine frame, and by guide rollers 59 and 59 provided at the upper end of an arm 58°58 connected from the mission case 5. It is guided and supported at a midpoint between the upper and lower sides and held in a constant inclined position, and the seedling take-out part 4a is at the lower end.

Near 4b, a seedling holding rod 60 is installed horizontally to prevent the seedlings from hanging down.

The planting drive case 7 is connected to the rear end of the transmission case 5. A shaft 62 having a crank arm 61 is supported through the left and right sides of the planting drive case 7. It is interlocked and connected to the connected intermediate transmission shaft 63 via a bevel gear.

The crank arm 61 that has reached both ends of the crank arm shaft 62, the swinging arm 65 pivoted to the transmission case portion 64, and the planting are carried out by the arm 66.
A pair of plantings provided at the tips of the nails 8 are configured to cause the claws 8, 8 to perform a predetermined circulation operation.

12 to 14 show a suspension mechanism U for the propulsion wheel A, and this mechanism will be explained in detail below.

In the traveling device using propulsion wheels B, a wheel lifting case 10 for lifting and lowering wheels, which has an axis 68 of the wheel B, is connected to the fuselage frame 1.
, 1, a wheel height adjustment mechanism that moves up and down over a large range to match the depth of the mud surface, and a suspension ffl mechanism 70 that swings slightly to follow unevenness.

Reference numeral 71 denotes a suspension spring, in which the transmission case 10, which is pivotally supported to the main transmission case 3 for speed and speed change, is locked to the fuselage frame 1 by the locking mechanism U, and is moved within a certain small range. It oscillates to absorb unevenness of the tiller.

Reference numeral 73 designates a connecting plate that connects the fuselage frame 1 and the transmission case 10, and has a long hole formed therein to allow the aforementioned small range of rocking.

As shown in FIG. 14, the locking mechanism U fixes an internally toothed member 75 having internal teeth to a member 74 fixed to the body frame 1 using three pins 74a for preventing rotation in the circumferential direction. A shaft 76 having a spline formed at its tip is rotatably mounted, and an external toothed member 77 is configured to be able to move relatively in the axial direction by fitting into the spline, and is constantly meshed with the internal toothed member 75. It is preferably biased by a spring 78.

Reference numeral 79 denotes a shifter that is loosely engaged with the recessed portion of the external tooth member 77 and swings horizontally and horizontally around the vertical fulcrum P.
The internal tooth member 75 is configured to be disengaged from the mesh.

Reference numeral 80 denotes an intermediate connecting member made by bending a thin plate into a U-shape to make it lighter.It is connected to the shifter 79 and stands long along the longitudinally long fuselage frame 1.
The outer wire of the operating wire is crimped, and the inner wire is linked to the receiving metal fitting 81.

The operating tool 82 of the operating wire is attached to the left operating bundle 6.

67, when the lock mechanism U is removed, the transmission case 1
This is a balance spring that prevents the 0 from falling due to the weight of the wheels.

The wheel height adjustment function using such a configuration will be explained.

First, operate the operating tool 82 of the locking mechanism L2 to pull the internal tooth member 75 out of the body to disengage it from the external tooth member 77, and release the locked state between the wheel transmission case 10 and the body frame 1. When the connection angle of the wheel transmission case 10 to the frame 1 is changed and the depth from the mud surface to the tiller changes greatly, the planting is changed and adjusted so that the portion E is maintained at a predetermined height.

The planting depth adjustment mechanism 83 is constructed as follows.

That is, as shown in Fig. 8, planting is carried out in mission case 5.
A bundle support member 6a is attached across the bracket 5a on the rear wall and the attachment portion 1a in the middle of the main frame 1.
A fixing pin 84 is attached to the coil spring 8 , and a connecting member 85 having a U-shaped cross section and pivotally connected to the float 11 is attached to the coil spring 8 .
6 to rotate the body forward, one of the plurality of recessed grooves 87 provided in the side wall of the connecting member 85 is engaged with the fixed bin 84, and the float 11 and the planting are connected. It is configured to change and adjust the relative posture of portion E.

The connecting members 85 are disposed at the left and right positions of the fuselage, and are rotated toward the rear of the fuselage against the coil spring 86 by holding handles 85a formed on the pivot connecting members 85, so that the float 11 and the planting are connected to the section E. The planting depth can be adjusted by adjusting the spacing.

As shown in Fig. 15.16, the propulsion wheel B has pipe-shaped spokes 90 disposed between a hoop-shaped pipe wheel body 88 and an axle mounting boss 89, and a propulsion lug made of sheet metal. 91 are arranged on the ring body 88 at appropriate intervals.

Furthermore, both the seedling stand 4 and the float 11 are molded from synthetic resin, and members 93 for attaching the supporting rails 92 of the seedling stand 4 and the metal fittings for connecting the floats are inserts. has been done.

Reference numeral 94 denotes a line drawing marker which is pivotally connected to the float 11.

As described in detail above, the engine A and the single propulsion wheel B are disposed at the front and back positions of the one-wheel rice transplanter body in the left-right direction center of the body of the present invention, and the output shaft 13 of the engine A is disposed on the lateral side of the engine A.
A transmission case 10 is provided with a reduction gear case 14 incorporating an engine reduction mechanism consisting of a group of reduction gears interlocked with each other, and a transmission case 10 incorporating a transmission device 70 for transmitting driving force to the wheels B at the rear of the reduction gear case 14. An intermediate power transmission shaft 21 is disposed behind the engine A and is interlocked with the engine speed reduction mechanism, with its axis running along the left-right direction of the aircraft, and power is transmitted from the middle of the intermediate power transmission shaft 21 to the wheels. It is configured to branch and transmit power to the tool 70, and a transmission shaft 34 in the longitudinal direction that transmits power to the part E is installed at the rear of the machine on the side opposite to the transmission case 10, sandwiching the center part in the left-right direction of the machine. A frame 1 to be installed inside is disposed, and a gear case Fa is provided at the front end of the frame 1, which houses a safety clutch 33 interlockingly connected to the front end of the transmission shaft 34 and an interlocking transmission mechanism interlockingly connected to the upper side thereof. and the shaft end of the intermediate transmission shaft 21 is interlocked and connected to the inter-stock transmission mechanism through a bevel gear mechanism 32 serving as a driving force transmission change mechanism within the gear case Fa. I have achieved similar effects.

In other words, the single wheel located in the center of the machine in the left-right direction along with the engine, which is indispensable to the structure of the rice transplanter and is the heaviest, is different from the one-wheel wheel located in the center of the machine in the lateral direction. In contrast to the engine deceleration section and wheel drive force transmission section, the planting section has a heavy driving force transmission direction changing section and a driving force transmission section distributed in the left-right direction of the aircraft. Therefore, as a whole, it is easy to maintain horizontal and longitudinal balance by distributing each heavy object on a plane, and the configuration makes it easier to maintain the horizontal balance of the aircraft. This made it possible to make the aircraft run more stably and improve straight-line performance.

Moreover, according to the present invention, the plant is equipped with an inter-plant transmission device, that is, a device that changes the rotating speed of the claw and the lateral movement speed of the seedling stand for planting, and adjusts the pitch for planting, and a safety clutch. Because of this, planting not only improves the functionality of the device, but also prevents damage or deformation of device components even if an excessive load is placed on the device, making it possible to plant good seedlings. In addition, by incorporating both the interstitial transmission and the safety clutch into the gear case that houses the drive power transmission change mechanism on the side of the engine, the space around the engine is effectively utilized and the overall design is compact. There is also the advantage that it can be formed.

[Brief explanation of the drawing]

The drawings show an embodiment of the one-wheel type rice transplanter according to the present invention, and the first
The figure is an overall side view, Figure 2 is a partially cutaway plan view, Figure 3 is a waist plan view of the main transmission case, Figure 4 is a waist plan view of the planting mission case, and Figure 5 Figure 4■
-V sectional view, Fig. 6 is a sectional view taken along the line VI-Vl in Fig. 4, Fig. 7 is a partially broken side view near the planting area, and Fig. 8 shows the planting depth adjustment mechanism. A side view, FIG. 9 is a partially cutaway plan view of the planting mechanism, FIG. 10 is a partially cutaway side view of the planting mechanism, and FIG. 11 is a schematic plan view showing the transmission system.
Fig. 12 is a side view showing the suspension mechanism, Fig. 13 is a plan view showing the suspension mechanism, and Fig. 14 is a side view showing the suspension mechanism.
Figure 15 is a longitudinal cross-sectional view with a part of the wheel cut away, Figure 16 is a side view of the propulsion lug, Figure 17 is a plan view of the main part of the seedling stand, Figure 18 19 is a sectional view taken along the line XIX-XIX in FIG. 17, FIG. 20 is a sectional view taken along the ■-n line in FIG. 17, FIG. 21 is a plan view of the float, and FIG. 22 is a side view of the seedling stand. is a side view of the float, Figure 23 A 2 ports,
Ha, 2, ho, hee is ii in Figure 21. FIG. 2 is a cross-sectional view at each corresponding break line of the Rollo, Haber, 2121 * * t Helhe line. A...Engine, B...Propulsion wheel, C
...Engine reduction section, D...Driving force transmission section, E...Planting section, F...Driving force transmission direction changing section, G.・・・・・・Planting is done in drive force transmission part, Fa... Gear case, 1... Frame, 10... Transmission case, 13... Output Shaft, 14... Reduction gear case, 21...
...Intermediate transmission shaft, 32...Bevel gear mechanism, 3
3...Safety clutch, 34...Transmission shaft.

Claims (1)

[Claims] 1 Engine A and a single propulsion wheel B are arranged in the front and rear positions of the center part in the left-right direction of the aircraft, and the engine is controlled by a group of reduction gears that are interlocked and connected to the output shaft 13 of engine A on the lateral side of engine A. A reduction gear case 14 having a built-in reduction mechanism is disposed, and the wheels B are arranged behind the reduction gear case 14.
Transmission case 1 containing a built-in transmission device 70 that transmits driving force to
0 is disposed, and behind the engine A, an intermediate transmission shaft 21 that is interlocked and connected to the engine speed reduction mechanism is disposed with its axis along the left-right direction of the aircraft body, and from the middle of the intermediate transmission shaft 21 to the wheels. The power is transmitted in a branched manner to the transmission device 70 of the machine, and a transmission shaft in the longitudinal direction that transmits the power to the section E is installed at the rear of the machine on the opposite side from the transmission case 10, sandwiching the center part in the left-right direction of the machine. 34 is disposed therein, and the front end of the frame 1 incorporates a safety clutch 33 interlockingly connected to the front end of the transmission shaft 34, and an interlocking transmission mechanism further interlockingly connected to the upper side of the safety clutch 33. Fa, and the shaft end of the intermediate transmission shaft 21 is interlocked and connected to the inter-plant transmission mechanism via a bevel gear mechanism 32 as a driving force transmission change mechanism within the gear case Fa. Machine.