JPH04104716A - Two wheel-based walking type rice transplanter - Google Patents

Abstract

PURPOSE:To improve traveling stability to inclination of field face by keeping lateral side floats independently so as to be able to carry out rolling operation to a link mechanism capable of engaging lateral side floats so as to be able to each raise and lower. CONSTITUTION:Lateral side floats 14a and 14b are attached through an engaging link mechanism A to a traveling machine body 30 so as to be able to each raise and lower and kept independently so as to be able to carry out rolling operation to the engaging link mechanism and the lateral side floats cope with fine and partial unevenness and inclination by rolling operation to an engaging link.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a two-wheeled walking type rice transplanter in which a center float is arranged between the left and right propulsion wheels, and side floats are arranged behind the left and right propulsion wheels, respectively. Regarding.

C. Prior Art] Conventionally, in this type of two-wheeled walk-behind rice transplanter, the left and right side floats were attached via an arch-shaped frame so that they could be raised and lowered against the traveling body.
No. 4590).

[Problem to be solved by invention]

In the above configuration, the side floats are simply fixed to the arched frame that rolls with respect to the traveling machine body, so as shown in Fig.
), and if the slope is constant as shown by the two-dot chain line, the left and right side floats are in contact with the entire bottom surface, but if the field surface corresponding to one side float is at a different slope. If the condition is different, the left and right side floats may be in different contact states, and the entire bottom surface of the side float may not be able to be brought into contact with the ground.

Therefore, the ground leveling performance was reduced accordingly.

An object of the present invention is to provide a system that can improve ground contact performance against slopes of the field by devising the attachment of the left and right side floats to a link mechanism that links the left and right side floats so that they can move up and down in reverse.

[Means to solve the problem]

The characteristic configuration according to the present invention is that a center float that operates in a rolling manner between the left and right propulsion wheels, and side floats are respectively arranged behind the left and right propulsion wheels, and the left and right side floats can be raised and lowered against the traveling body. The floats are attached to the connecting link mechanism via a connecting link mechanism, and the left and right side floats are attached to the connecting link mechanism so that they can be rolled independently.The functions and effects thereof are as follows.

[For production]

In other words, without considering fine local irregularities and slopes,
Rough horizontal inclinations of the field surface relative to the traveling machine can be countered by raising and lowering the left and right side floats in reverse, and irregularities and small differences in slope at the ground contact points of individual side floats can be countered by rolling action on the linkage. Ground contact performance can also be improved depending on the field surface.

〔Effect of the invention〕

Therefore, the stability of the running aircraft is improved by improving the ground contact performance of the rolling center float and the left and right side floats, and the ground leveling performance against wheel marks by the left and right side floats is also improved due to the rolling action of the side floats themselves. I was able to improve myself.

〔Example〕

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

As shown in Figure 4, the transmission case for driving (1)
A pair of transmission cases (2) are located on both the left and right sides of the horizontal axis (Pl
), and this transmission case (2
) are provided with propulsion wheels (3a), (3b) for traveling and support the traveling body (30). The rear of the traveling machine is equipped with a seedling planting device consisting of a planting arm (4), a seedling stand (5), etc., and a control handle (6), as well as a transmission case (1) and a planting arm (4). ) is provided with a tank (7) and a feeding device (8) for feeding out the fertilizer in the tank (7).

A center float (9) is provided at the bottom of the traveling body (30), and a groove maker (10) for making grooves on the field surface (G) is fixed to this center float (9), and a feeding device is attached to the center float (9). The fertilizer fed out from (8) passes through the hose (11) and is fed into the groove made by the furrower (10). As described above, a two-wheel, two-row type walk-behind rice transplanter is constructed.

This walk-behind rice transplanter is equipped with a gasoline engine (12), and as shown in Fig. 1, a downward-sloping frame (13) is fixed to the front of the transmission case (1), and a second frame (13) is fixed to the front of the transmission case (1). A gasoline engine (12) is mounted on the top, and the gasoline engine (12) is supported in a forward downward tilting position.

Next, the vertical movement structure of the left and right wheels (3a) and (3b) will be explained. As shown in FIGS. 4 and 5, a single-acting first hydraulic cylinder (1
8) is connected to the rear end of this first hydraulic cylinder (18).
Or is it pointing towards the rear of the aircraft? This first hydraulic nolinda (
A support arm (20) is fixed to the tip of the piston loft (18a) of 18), and this support arm (20)
A pair of upper and lower balance arms (21) around the vertical axis center (P4) of
It is attached so that it can swing freely. Then, either this balance arm (21) or the left and right elongated holes (13a)
), and a pair of left and right rods (22) are constructed and connected across both ends of the balance arm (21) and the arm (2a) at the base of the transmission case (2). With the above structure, when the first hydraulic cylinder (18) is expanded or contracted, the left and right transmission cases (2) and the propulsion wheels (3a)
, (3b) are operated up and down in the same direction.

As shown in FIG. 5, across the support arm (20) and the bracket (23) fixed to the left rod (22),
A double-acting second hydraulic cylinder (24) is connected in construction. With this structure, for example, the second hydraulic cylinder (24)
When extended, the left transmission case (2) and propulsion wheel (3a) are swung downward. In conjunction with this operation, the balance arm (21) is swung counterclockwise in FIG. 5 via the rod (22), and the right transmission case (2) and wheels (3b) are swung upward. be operated dynamically.

In other words, by expanding and contracting the second hydraulic cylinder (24),
Left and right transmission cases (2) and propulsion wheels (3a), (3
It is possible to perform the contrary vertical swing operation of b).

Next, center float (9) and side float
(14a) and (14b) will be explained. 1.2
゜As shown in Figure 3, the center float (9) is located between the left and right propulsion wheels (3a) and (3b) and at the bottom of the front of the aircraft, and is located at the rear end or from the path of the planting arm (4). It is located slightly towards the front of the aircraft.

The fixed frame (15) on the fuselage side is equipped with an operating lever (16) that can be freely swung up and down around the horizontal axis (P5), and a lever that engages and holds this operating lever (16) in a predetermined position. It is fixed to the guide (17) or the frame (15).

A support frame (19) is extended from the rear end of the center float (9), and this support frame (19) is extended from the rear end of the center float (9).
9) At the rear end, a support bracket (25) is attached so as to be able to swing freely around the longitudinal axis (P3), and this support bracket (25) supports the horizontal axis (P3) of the operating lever (16).
2) It is attached to the surroundings so that it can swing freely. With the above structure, the center float (9) can freely swing up and down about the horizontal axis (P2) with respect to the aircraft body, and the center float (9) can freely swing up and down around the horizontal axis (P2), and also around the longitudinal axis (P3).
It is supported by its surroundings so that it can roll freely.

Next, the lifting and lowering rolling operation of the propulsion wheels (3a) and (3b) will be explained using the center float (9) as a ground sensor. As shown in FIGS. 5 and 6, a first control valve (28) for the first hydraulic cylinder (18);
and a second control valve (
29), and by linking the front end of the center float (9) and the respective control valves (28), (29) with a mechanical linkage mechanism (26), the center float can be adjusted based on the vertical movement of the traveling aircraft. By the lifting and lowering operation (9), both wheels (3a) and (3b) are moved up and down in the same direction to maintain a constant seedling planting depth. By the rolling action of the center float (9) based on the left and right inclination of the traveling body, the left and right wheels (3a), (3b) are raised and lowered in reverse order, and the traveling body is maintained in a constant posture with respect to the field surface (G).

Next, the mounting structure of both side floats (14a) and (14b) will be explained. As shown in FIGS. 1 and 3, side float support rods (31) are provided extending downward from the fixed frame (15) to the left and right, and bosses are provided at the left and right ends of the side float support rods (31). A bell crank (33) is rotatably provided on this boss via a rotating shaft (32).

Meanwhile, a fixing bracket (34) is fixed to the upper surface of the side float (14a), and a bell crank (33)
Attach the hanging bracket (35) to one end of the support shaft (
36) to attach the fixed bracket (34) to the hanging metal fitting (3).
5), and the side float (14a) can be rolled around the longitudinal support shaft (26). The above structure is also provided for the other side float (14b). The left and right bell cranks (33
), (33) the other ends of which are connected by a connecting rod (37), and when one side float (14a) rises, the other side float (14b) descends, both side floats (14a), (14b) can be raised and lowered upside down.

Therefore, both side floats (14a), (+4b
) moves up and down in reverse based on the left and right inclinations of the field, and also performs a rolling operation based on the inclination of each ground surface to achieve stable ground contact performance.

At the insertion portion of the front-rear support shaft (36) of the hanging fitting (35), a vertical elongated hole (35a) is formed in the front insertion portion, and a hole corresponding to the diameter of the front-rear support shaft is drilled in the rear insertion portion. The side floats (14a) and (14b) are configured to be able to swing up and down.

The front ends of the side floats (14a) and (14b) are connected to the planting clutch lever (
39), the side float (
The front ends of the side floats (14a) and (14b) are raised to prevent them from falling forward. I wanted to do it, side flow) (
14a), (14b) It is possible to prevent the front end from going deep into the mud and causing turning resistance with the forward downward position. The operating mechanism for lifting the side floats (14a) and (14b) may be a steering clutch lever.

[Another example]

■ In order to raise and lower the left and right side floats (14a) and (14b) oppositely, a gate-shaped frame that operates in a rolling manner is pivotally supported on a fixed frame (15), and the hanging fittings (35) are attached to the left and right ends of this gate-shaped frame. ) may be fixed.

Above, side float support rod (31), bell crank (
33), or gate-shaped frame and hanging metal fittings (35)
) is called the linkage mechanism (A).

(2) The present invention may be applied to a vehicle that does not have a rolling/elevating split portion using the left and right propulsion wheels (3a) and (3b).

It should be noted that the present invention is not limited to the structure shown in the accompanying drawings by adding reference numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the two-wheeled walk-behind rice transplanter according to the present invention, and FIG. 1 is a rear view showing how the left and right side floats are connected, and FIG. 2 is a plan view showing the arrangement of the center float and left and right side floats. , Fig. 3 is a side view showing the mounting structure of the side float, Fig. 4 is an overall side view, Fig. 5 is a plan view showing the rolling and elevating cylinder, and Fig. 6 is a front view showing the rolling and elevating link mechanism. , and FIG. 7 is a rear view showing a state in which the conventional left and right side floats are linked. (3a), (3b)... Propulsion wheel, (9).
...Center float, (14a), (14b
)...Left and right side floats, (30)...
...Traveling body, (A)...Interlocking link mechanism.

Claims (1)

[Claims] A center float (9) that operates in a rolling manner between the left and right propulsion wheels (3a) and (3b), and the left and right propulsion wheels (
3a) and (3b), side floats (1
4a) and (14b), and the left and right side floats (14a) and (14b) are attached to the traveling body (30) so as to be able to rise and fall upside down via the link mechanism (A), and the link mechanism (A) A two-wheel walking type rice transplanter in which left and right side floats (14a) and (14b) are attached to the mechanism (A) so that they can be rolled independently.