JPH04304810A - Walking type rice transplanter - Google Patents

Abstract

PURPOSE:To obtain the title compact lightweight rice transplanter by arranging an engine, a transmission case and a transplanting case on a pair of left and right main frame steel pipes and constituting a ladder structure in a plane view. CONSTITUTION:Main frames 10 consist of steel pipes, the pipes are bent into a crank shape in a side view in such a way that the front horizontal part is made low and the rear horizontal part is made high. An engine base is welded and fixed to a pair of the left and right main frames, an engine E is arranged, a transmission case 9 is immobilized to the curved part at the rear of the engine and a transplanting case 15 is fixed to the rear end. These members astride the left and right main frames and are fixed in a ladder shape.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the arrangement of the engine, transmission case, and planting case of a walk-behind rice transplanter, and the frame that supports them.

0002

[Prior Art] The arrangement of the engine and transmission case in a conventional walk-behind rice transplanter is, for example, as shown in FIG.
A center frame 3 was provided to protrude rearward from the rear surface of the mission case 1, and a planting case 4 was fixed to the rear end of the center frame 3.

0003

[Problem to be Solved by the Invention] With this configuration in which the engine E and the planting case 4 are arranged in series from the transmission case 1 to the front and rear, each part has variations in accuracy inherent to that part. Due to these variations and slight positional deviations during assembly, the entire assembly could become twisted or uneven. In particular, since there is only one center frame and the seedling stand and the like are placed on the rear of it, a small deviation in assembly results in a large deviation in the rotational direction at both ends of the seedling stand. Therefore, if uneven wear occurs on the gears and shafts that transmit power, or when performing rolling control, if the sensor is installed with the engine stand 2 as a reference, even if the engine stand 2 is horizontal, the planting case Plant No. 4 was sometimes tilted, and the planting depth was different between the left and right sides. In addition, since the engine stand 2 on which the engine E is mounted is supported on a cantilever, it must be made thicker and fixed to the front of the transmission case 1, which increases the weight and places the engine in a higher position. The center of gravity was also higher. Furthermore, since the center frame is also supported on a cantilever, it must be made thicker, resulting in an increase in weight.

0004

[Means for Solving the Problems] In order to solve these problems, the present invention disposes the engine on the front of a pair of left and right main frames made of steel pipes, and disposes the transmission case in the center. Then, place a planting case at the rear,
The main frame, engine stand, transmission case, and planting case are integrally constructed in a ladder shape when viewed from above.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems to be solved by the present invention and the means for solving them are as described above, and the structure of an embodiment shown in the accompanying drawings will be explained. Figure 1 is an overall side view of the walking rice transplanter, Figure 2 is a side view of the main frame with the engine, transmission case, and planting case attached, Figure 3 is a plan view, and Figure 4 is viewed from the X-X arrow in Figure 2. 5 is a Y-Y direction view in FIG. 2, FIG. 6 is a side view of the cylinder portion, FIG. 7 is a plan view of the float portion, and FIG. 8 is a perspective view of the float. To explain the overall configuration in FIG. 1, an engine E is mounted on the front end of the main frame 10, a transmission case 9 is fixed to the rear end of the engine E, a planting case 15 is fixed to the rear end of the main frame 10, and the planting case 15 is fixed to the rear end of the main frame 10. A handle 17 is provided rearwardly and upwardly protruding from the rear surface of the attached case 15, and a steering clutch lever 20, a working clutch lever 21, a stock spacing adjustment lever 22, etc. are attached to the handle 17. The area from the engine E to above the planting case 15 is covered with a top cover 28. 29 is a fuel tank, 30 is a spare seedling stand, and 31 is a side row fertilizer applicator.

A float is provided below the main frame 10, and as shown in FIGS. 7 and 8, the center float 19 is provided with a concave notch 19a at its rear end so as not to interfere with walking. There is. In other words, conventionally, as shown in FIGS. 9 and 10, the rear edge of the float 19' is exactly at the position where the toe of the foot F hits when walking, and to avoid this, it is necessary to extend the handle 17 backward. be. However, there were problems such as the overall length becoming longer and making it difficult to move around, so in this embodiment, a notch 19a is provided in the center of the rear side to prevent stepping on it when walking, and the center float 19
This allows extra space for the feet to be secured without changing the length of the steering wheel or the handle 17.

A pulley 11 is fixed to the output shaft 18 of the engine E, and power is transmitted from the pulley 11 to the transmission case 9 via a belt 12 and a pulley 13. The speed is changed by a gear lever 27 protruding from the transmission case 9, and power is transmitted from the transmission case 9 to the planting case 15 via the drive shaft 14, and the lateral reciprocation of the seedling stand 16 and the planting claw (not shown) are carried out. And the side row fertilizer applicator 31 is driven. Further, an output shaft 2 protruding from the side surface of the mission case 9
Power is transmitted from the transmission case 2 to the axle 25 through the chain in the transmission case 24 to drive the wheels 26, and the transmission case 2
4 is configured to be rotatable around an output shaft 23 in order to maintain a constant planting depth, and as shown in FIG. A connecting rod 33 is pivotally connected to the tip of the piston rod 32a, and the other end of the connecting rod 33 is connected to the transmission case 2.
It is pivotally supported at the tip of an arm 34 fixedly attached to 4. With this configuration, for example, when the plowing platform becomes deep during planting work in a weak field, the cylinder 32 is extended, the transmission case 24 is rotated downward, the wheels 26 are lowered, and the machine body is raised. This ensures that the planting depth remains constant.

The structure of supporting the engine E, transmission case 10, and planting case 15 by a frame, which is the main part of the present invention, is shown in FIGS. 2 and 3. The frame is lighter and smaller in diameter than a U-shaped frame, and is bent at the center so that the front horizontal part is low and the rear horizontal part is high, creating a crank-shaped frame when viewed from the side, so that the left and right sides are parallel. A pair of bumpers 35 are arranged and fixed at the front end, an engine stand 36 made of a plate is welded and fixed to the rear of the bumper, and a curved portion 10 at the rear of the bumper 35 is fixed.
A transmission case 9 is fixed to a, and a planting case 15 is fixed to the rear end, which is integrally fixed in a ladder-like manner astride the left and right main frames 10 to form a sturdy structural member. .

The engine E is mounted on the engine stand 36, and the transmission case 9 is attached by providing a reinforcing plate 37 protruding downward and rearward from the curved portion 10a of the main frame 10, and attaching the reinforcing plate 37 to the rear of the curved portion 10a. main frame 10
A support plate 39 having an inverted L-shape in side view is fixed on top, and the lower part of the vertical surface of the support plate 39 and the reinforcing plate 37 are connected to each other.
The mission case 9 is bolted to the main frame 10 and is supported substantially at the center of the main frame 10. Further, a hydraulic pump 40 is placed on the upper surface of the support plate 39.
Cutouts 39a, 39a, into which the main frames 10, 10 are fitted and fixed, are provided on the upper left and right sides of the vertical plane.

The mounting structure of the planting case 15 is such that the upper part of the support plate 41 is fixed to the rear end of the main frame 10, and the upper part of the planting case 15 is fixed to the lower part of the support plate 41 with bolts. A reinforcing frame 42 is fixed in parallel to the main frame 10 between the center of the lower front surface of the planting case 15 and the center of the lower rear surface of the mission case 9. As shown in FIGS. 4 and 5, the reinforcing frame 42 is arranged in a triangular shape in cross section and is firmly fixed to prevent twisting or the like.

[0011]

[Advantageous Effects of the Invention] With the above-described structure, the present invention provides the following effects. That is, a pair of main frames are arranged in parallel on the left and right, and the engine and
Since the mission case and planting case are fixed in a ladder-like manner, the entire body becomes one piece, increasing the strength and reducing the possibility of twisting. Also, since the main frame is made of steel pipes, the main frame is made of steel pipes, so Compared to a frame with a letter-shaped structure, it is thinner and lighter, and the width of the frame can be narrower, increasing the space between the left and right frames, and parts such as links can be placed between them, making it more compact. It was possible to make it into an aircraft.

[Brief explanation of drawings]

FIG. 1 is an overall side view of a walking rice transplanter.

FIG. 2 is a side view of the main frame with the engine, transmission case, and planting case attached.

FIG. 3 is a plan view as well.

FIG. 4 is a view taken along the line XX in FIG. 2;

FIG. 5 is a view along YY arrow in FIG. 2;

FIG. 6 is a side view of the cylinder part.

FIG. 7 is a plan view of the float section.

FIG. 8 is a perspective view of a float.

FIG. 9 is a plan view of a conventional float section.

FIG. 10 is a side view showing a working state using a conventional float.

FIG. 11 is a plan view showing an attachment configuration of a conventional engine, transmission case, and planting case.

[Explanation of symbols]

E engine 9 Mission case 10 Mainframe 15 Planting case 36 Engine stand

Claims (1)

[Claims] Claim 1: An engine is arranged on the front part of a pair of left and right main frames made of steel pipes, a transmission case is arranged in the center part, a planting case is arranged in the rear part, and the main frame and engine stand are arranged. A walking-type rice transplanter characterized in that a mission case and a planting case are integrally configured in a ladder shape in plan view.