JPH0240735Y2 - - Google Patents

Description

[Detailed description of the invention] This invention proposes a propulsion device for a rice transplanter that smoothly propels the machine in deep paddy fields.

A rice transplanter is designed so that its weight is supported equally between the propulsion wheels and the float. Therefore,
In shallow rice fields, the transmission case is rotated around its tip to pull up the propulsion wheels, and the float and propulsion wheels are adjusted so that they support half the weight of the aircraft. By pushing down the wheel, the above conditions are satisfied and used. In deep paddy fields, the propulsion wheels sink into the mud until their axles barely touch the mud surface.
For this reason, when conventional rice transplanters are used in deep paddy fields as described above, when the propulsion wheels are immersed in the mud so that the axles are barely touching the mud surface, the transmission case that supports the axles is damaged. The rear end is immersed in the soil, and as the aircraft moves forward, this immersed transmission case pushes the soil, and next to it, a central float and side floats are provided close to each other to provide a place for the mud to escape. There was no mud, and mud had accumulated in front of the transmission case, preventing the aircraft from moving forward. Also, 2
In the case of row planting, the transmission case was located between the wheels and the center float, and a similar tendency occurred.

Furthermore, by increasing the diameter of the propulsion wheels,
Although it is possible to solve this problem, increasing the diameter of the propulsion wheels would cause the aircraft to stretch forward and backward, making it larger, making the headland wider, and making the aircraft heavier, which would make it impractical. Ta.

This idea is to create a rice transplanter in which the bottom of the center float at the tip of the transmission case or slightly behind this when viewed from the side is higher than the bottom on the side where the seedlings are planted using the planting rod. This was resolved by.

Next, the rice transplanter with this invention will be explained based on the drawings. 1, 1 is a pair of transmission cases,
It protrudes rearward from the front part of the fuselage 2, and rotates around its tip so that the rear end moves up and down. Reference numerals 3 and 3 designate a pair of propulsion wheels, and their axles 4 and 4 are mounted on the rear ends of the transmission cases 1 and 1, and as is well known, the power of the prime mover 5 is transmitted and forced It is designed to be driven.

6 is a central float, which is attached to the transmission case 1,
1, and is arranged on the lower abdomen of the fuselage 2 in a longitudinal direction.The rear end is pivoted to the fuselage 2 with a pin 7, and the front end is held to the fuselage 2 with links 8 and 9. The front end is made to move up and down by expanding and contracting. The central float 6 is provided with a front ground contact part 6a and a rear ground contact part 6b at the front end and rear end so that the lower surfaces thereof are at the same height. A bridge-like structure rises from the ground a little to the rear of the end.

As is well known, the rotation of the transmission cases 1, 1 is caused by the vertical movement of the tip of the central float 6 being transmitted to the valve 11 by the rod 10, which is then transmitted to the cylinder 1.
A method is adopted in which oil is supplied and discharged into the piston 2 so that the piston 13 operates the arm 14, or the arm 14 is operated manually.

Further, 15 and 15 are side floats, 16 is a seedling stand, 17, 17... are planting rods, and 18 is a handle.

When the rice transplanter configured as described above is propelled through deep paddy fields, the rear ends of the transmission cases 1, 1 are lowered to push down the propulsion wheels 3, 3.
The lower end of the float 3 reaches the tiller and supports about half of the weight of the machine, and the remaining half is supported by the center float 6 and the pair of side floats 15, 15 during operation.

Then, the propulsion wheels 3, 3 are immersed in the mud until the axles 4, 4 reach near the surface of the rice field, and along with this, the rear ends of the transmission cases 1, 1 are immersed in the mud. As the aircraft 2 moves forward, the transmission case 1,
1 pushes the mud in front of it.

Here, in the conventional case, the center float 6 and the side floats 15, 15 were arranged on both sides of the transmission cases 1, 1, so that the transmission cases 1, 1 were There was no place for the mud pushed forward to escape, and a small mountain formed in front of transmission cases 1 and 1, preventing the propulsion of fuselage 2.

In comparison, according to this rice transplanter, the central float 6 is provided so that the rear end portions of the transmission cases 1 and 1 and the rear thereof are raised above the water surface when viewed from the side. , 1, the mud that is pushed forward escapes under the floating bridge shape of the central float 6, and then reaches the rear ground contact portion 6b.
is pressed and discharged to the left and right outside at the rear of the transmission cases 1,1. Therefore, mud above a certain level does not accumulate in front of the transmission cases 1, 1, and the propulsion of the fuselage 2 is hardly hindered.

In addition, in implementing this, the central float 6 is
It is possible to adopt a configuration in which a pair of front and rear floats is made and these are connected with a rod or board. Further, a mud removal groove in the front-rear direction may be provided in the center of the rear ground contact portion 6b so as to be raised from the lower surface.

In short, this idea consists of a pair of transmission cases that protrude rearward from the left and right sides of the front of the aircraft, and a pair of propulsion cases that are mounted on shafts at the rear end of the transmission cases and are driven by the power of the prime mover. A rice transplanter equipped with wheels, a central float provided in the front-back direction passing between the pair of transmission cases, and a planting rod for planting seedlings on the side of the rear of the central float, when viewed from the side. This is because the rice transplanter is characterized in that the bottom surface of the central float at the tip of the transmission case or slightly behind this is configured higher than the bottom surface on the side where the seedlings are planted using the planting rod. When planting rice in paddy fields with deep tillers, the mud pushed out by the transmission case can escape to the high part of the bottom of the central float, which prevents it from accumulating in front of the transmission case and causing negative effects on planting operations. This has the effect of preventing this from occurring and allowing for better rice transplanting work.

[Brief explanation of the drawing]

Figure 1 is a side view of a rice transplanter with this invention, Figure 2 is a plan view of it, and Figure 3 is a rice transplanter with this invention.
A side view of the row rice transplanter, and FIG. 4 is a plan view thereof. The symbols in the figure are as follows. DESCRIPTION OF SYMBOLS 1... Transmission case, 2... Body, 3... Propulsion wheel, 4... Axle, 5... Prime mover, 6... Central float, 6a...
...Front ground contact part, 6b...Rear ground contact part.

Claims (1)

[Scope of utility model registration request] A pair of transmission cases that protrude rearward from the left and right sides of the front part of the aircraft, a pair of propulsion wheels that are mounted on a shaft at the rear end of this transmission case and are driven by the power of a prime mover, and the above-mentioned pair of transmission cases. In a rice transplanter equipped with a central float provided in the front-rear direction through the center float, and a planting rod for planting seedlings on the side of the rear of the central float, the tip part of the transmission case or from this when viewed from the side. A rice transplanter characterized in that the bottom surface of the central float at the rear of the haze is configured higher than the bottom surface on the sides of the position where seedlings are planted using a planting rod.