JPH0355084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a planting section drive device of a walk-behind rice transplanter.

Generally, it is desired that a walking rice transplanter be lightweight and compact.

However, the conventional model has multiple planting rods, seedling stands, and transmission cases that drive them behind the running wheels, which causes the center of gravity of the machine to shift toward the rear, worsening the front-to-back balance of the machine. There were drawbacks such as the increased length of the aircraft and poor maneuverability.

The present invention aims to improve the above-mentioned drawbacks, and includes an engine and a transmission case provided in front of the axle of the running wheels provided on the aircraft body.
At the rear, there is a rear-tilted seedling stand and a planting transmission case.
In a walk-behind rice transplanter equipped with a plurality of planting rods, the plurality of planting rods and the crankshaft of the planting transmission case are interlocked and connected by a crank rod, and the plurality of planting rods are connected by one crank rod. The device is characterized in that it is configured to be driven.

The embodiments shown in the drawings will be explained below.
Engine 1 and transmission case 2 are located at the front of the aircraft.
A swing transmission case 3 is protruded rearward from a wheel drive shaft on one side of the transmission case 2, and a running wheel 4 is pivotally supported at the rear of the transmission case 3 at the center of the width of the machine. The left side of the planting transmission case 5 arranged behind the axle is connected to the transmission case 2 through a front-rear chain case 6, and the support arm 7 protruding from the right side of the transmission case 2 is connected with a frame cylinder 8. It is connected to a handle 9a on that side, and the handle 9a is connected to the planting transmission case 5 and the other handle 9b by a rail 10 to form a frame, and the lower part is connected to the planting transmission case 5 and the other handle 9b. A float 11 having a horseshoe shape in plan view is provided, and the front part of the float 11 is connected to the front lower surface of the engine base with a link 12, and the rear part is connected to a planting depth adjustment rod 1.
3, it is connected to the left and right handles 9a, 9b so as to be tiltable and lockable.

Then, support arms 14, 14 are suspended from the front portions of the left and right handles 9a, 9b toward both outer sides slightly forward of the rear ends of the running wheels 4, and the planting rods 1
5, 15 have their bases connected to the lower parts of the support arms 14, 14 by swinging arms 16, 16, and shafts 17, 17, which serve as crank pins in the middle, are connected to the crank arms 18, 18 and the reversing shafts 19, 19. arm 1
It is linked to 4 and 14.

In addition, the planting transmission case 5 is equipped with a transverse shaft 20 and a crankshaft 21 for driving the planting rod as shown in FIG. The crank arm 24, which is connected to the rearwardly tilted seedling stand 23 via slides 22b and 22b, and which is fixed to the end of the crankshaft 21, is attached to the rear of the crank rod 25 whose front end is bifurcated in plan view. The forked portion at the front of the crank rod 25 is rotatably connected to the shafts 17, 17 of the planting rods 15, 15 so as to straddle the rear portion of the running wheel 4 from side to side. .

Next, another example of the planting depth adjusting rod 13 will be explained with reference to FIGS. 5 and 6.
It is tiltably connected to the bracket 11a on both left and right sides of the handle 9a (only one is shown) with a pin 26, and the bent part in the middle is connected to the handle 9a with a fulcrum pin 27.
(9b), and the elongated hole 28 at the top is screwed into the bracket 29 protruding from the handle 9a with a tightening bolt 30 so that the tilting can be adjusted, so that the planting depth can be adjusted steplessly. Moreover, there is no wobbling like with the conventional guide groove method.

In addition, numeral 31 in the drawings is an apron having a notch at a portion corresponding to the planting rods 15, 15.

In the one-wheel type rice transplanter mentioned above, when the traveling wheel 4 is driven, the machine moves forward, and the crankshaft 21 of the planting transmission case 5 is driven by the chain 32 in the chain case 6. 23 reciprocates in the lateral direction, and on the other hand, the left and right planting rods 15, 15 are moved up and down by one crank rod 25, scraping off the pine seedlings in the seedling stand 23 one by one and planting them on the field. wear.

During such planting work, the planting rods 15, 15 are moving up and down at a position where they overlap the rear of the running wheels 4 in a side view, and the seedling platform 23 and the planting transmission case 5 , 15, it is possible to shorten the length of the aircraft from front to back. In particular, the driving device for the two planting rods 15, 15 is a crankshaft 21 which also serves as the input shaft of the planting transmission case 5.
Since it is driven by one crank rod 25 and one crank rod 25, compared to a system in which two planting rods 15, 15 are driven through separate transmission devices,
The weight behind the axle of the running wheels 4 can be reduced, and accordingly, the length of the front part of the machine body can be shortened in relation to the front-to-back balance of the machine body, making it possible to make the walking-type rice transplanter light and compact as a whole. .

As described above, the present invention includes an engine and a planting case in front of the axle of the running wheels provided on the machine body, and a rearwardly inclined seedling stand, a planting transmission case, and a plurality of planting rods. In the walk-behind rice transplanter, the plurality of planting rods and the crankshaft of the planting transmission case are interlocked and connected by a crank rod, and the plurality of planting rods are driven by one crank rod. Therefore, a plurality of planting rods can be operated by one crank rod, and the structure of the transmission device can be significantly simplified and the weight of the machine can be reduced.

Moreover, as mentioned above, multiple planting rods are driven by a single crank rod from the planting transmission case, so there is no need to support the left and right planting rods in separate transmission cases as in the past. It only needs to be supported by the arms, and this configuration can further help reduce the weight of the machine.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
Figure 1 is a side view of the rice transplanter, Figure 2 is a plan view of the same as above,
FIG. 3 is a developed sectional view of the main parts, FIG. 4 is a plan view of the float, FIG. 5 is a rear view showing another example of the float support, and FIG. 6 is a side view of the same. 2...Mission case, 4...Traveling wheel, 5
... Planted transmission case, 6 ... Chain case, 14
...Support arm, 25...Crank rod.

Claims (1)

[Claims] 1 A walking type with an engine and a planting case installed in front of the axle of the running wheels installed on the aircraft, and a rearward-slanted seedling stand, a planting transmission case, and multiple planting rods placed at the rear. The rice transplanter is characterized in that the plurality of planting rods and the crankshaft of the planting transmission case are interlocked and connected by a crank rod so that the plurality of planting rods are driven by one crank rod. Planting section drive device of type rice transplanter.