JPS6156011A - Running apparatus of agricultural working machine for rice field - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a vehicle body equipped with running wheels that are moved up and down by a hydraulic cylinder device on both the left and right sides of the machine body, and a working machine such as a rice transplanter or a seeding machine is attached to the vehicle body. This invention relates to a traveling device for agricultural machinery for paddy fields.

[Conventional device]

Conventionally, in machines where the running wheels are movable up and down on both the left and right sides of the aircraft and are moved up and down separately using a hydraulic linder device,
The movement K of the grounding float, which is disposed between the left and right wheels and is capable of rolling and vertical movement, switches the hydraulic switching valve of the hydraulic cylinder device to maintain the grounding pressure of the grounding float approximately constant, and the aircraft A walking-type rice transplanter is well known, which is equipped with a rice transplanter on a traveling vehicle body that controls the vertical movement of the left and right wheels to prevent the rice from moving left and right beyond a certain level.

[Problem that the invention seeks to solve]

In conventional walk-behind rice transplanters, the ground float was free to roll even when turning, so when the machine is bothered during one turn, the vertical movement control of the wheels comes into play, and the troubled side, that is, when it does not turn, is activated. There was a problem in that the wheels on one side were moved downwards and the wheels on the other side were moved upwards, causing the tiller to float upwards, making it impossible to turn reliably. In addition, the side of the grounding float itself that swings into the surface of the topsoil of the paddy field has a tendency to push into the surface of the paddy field, resulting in more mud pushing, which also makes it difficult to swing.

[Technical means to solve the problem]

The present invention takes the following technical measures to eliminate the drawbacks of the conventional device.

That is, this invention provides a pair of running wheels (5) and (6) that can move up and down on both the left and right sides of the aircraft body (1), and a single ground contact between the left and right running wheels (5) and (6). Float 4 is provided for rolling and pitching, and the pair of left and right traveling wheels (5) and (6) are configured to independently control vertical movement with a hydraulic cylinder device (9), and this hydraulic cylinder device (9) ), αQ hydraulic switching valve■, -
are switched in the same direction by the pitching of the grounding float 4, and reversibly switched by rolling, thereby maintaining the ground pressure of the grounding float 4 within an appropriate range and keeping the aircraft (1) horizontally horizontal. In a paddy field agricultural working machine in which a working machine (to) such as a rice transplanter or a seeding machine is attached to a paddy field traveling vehicle body that is controlled to maintain the rice field in a horizontal direction, a rolling prevention mechanism (to) that prevents rolling of the ground float (to) is provided. ), and this rolling prevention mechanism (to) is activated to a locked state due to the disengagement operation of a clutch that turns on and off the transmission of the working machine 0υ. The structure was as follows.

〔Example〕

To explain in detail the walk-behind rice transplanter which is an embodiment of the present invention, (1) is a machine body, an engine stand (3) is fixed to the front part of a traveling rice transplanter (2), and a working machine is attached to the rear part. Connecting frame (4
) is installed. (5) and (6) are traveling wheels, and a chain case (7) whose base portions are rotatably pivoted on both left and right sides of the traveling transmission case (2).

(8) It is mounted on a shaft on the distal end side and can be freely moved up and down while being rotated by transmission.

(9) 9αQ is a hydraulic cylinder device, and the cylinder (9
a) The base side of (10a) is the engine stand "(3
) The bracket of the jacket is bent on the axis θυ that protrudes on both the left and right sides,
03, and the tips of the pistons (9b), (10b) are connected to the arms α4.03, which are integral with the chain cases (7), (8). Pistons (9b), (1
The wheels (5) and (e) are provided to move downward when the wheel 0b) protrudes. αQ is the engine and αη is the hood.

(G) is a working machine, which is a rice transplanter in the illustrated example, and a planting transmission case aI is attached to the rear end of the connection frame (4), and the base of the control rod is fixed to the rear lower end of this transmission case Ql. The tip is extended backwards and upwards. Seedling planting tools a]) and @ are attached to both left and right sides of the planting transmission case C1l, and a seedling tank (2) that reciprocates left and right along the upper side of the control rod (1) is installed, and this seedling tank The seedlings placed and housed in (2) are divided into Q seedling planting tools each at 0° C. and are installed to be planted on the lower soil surface.

(Foundation) is a grounding float, and the left and right running wheels (5).

(6) It is fixed in the longitudinal direction at the left-right center position of the fuselage on the lower side of the gutskerato (c), which is arranged between and pivoted to the rear lower end of the planting transmission case a1 with a horizontal pin (c). A vertical bin is installed on the cylindrical body) so that it can rotate freely, and the rear upper part of the grounding float 4 is attached to this bin via a metal fitting so that it can rotate freely in the front-back and left-right directions. There is. In addition, the upper part of the front and rear intermediate portions is attached to the connecting frame (4) of the body (1), and the link frame, cylinder body (1), vertical bottle OD, and metal fittings (
2) is attached so that it can move vertically and rotate left and right, and the grounding float is provided so that it can roll and pitch freely relative to the fuselage.

(To) is a rolling prevention mechanism, in which a protrusion (To) is provided on the metal fitting (C) that protrudes upward and rearward, and a pin (7) is attached to the protrusion on the base side of the control rod so that it can rotate freely. , a lock fitting (B) having a locking groove ω formed so as to be wide on the front side is configured so that the locking groove (to) of the fitting is engaged with the protrusion (B), and the lock fitting (B) is configured to engage with the protrusion (B). The ground float (E) is designed to roll freely when it is engaged with the protrusion (), but will not move when it is deeply engaged.

This rolling prevention mechanism □□□ is attached to the upper rear side of the control rod via a spring /l/ (to).When planting seedlings, a clutch (not shown) is turned on and off. When the clutch is turned off, the lock fitting (B) is rotated by the spring (6) in the direction of the arrow (A), and the protrusion (UP) is ), and when set to ``on'', it rotates in the opposite direction of the arrow (A) and locks shallowly into the protrusion ■.

) is the hydraulic case, and the traveling transmission case (2) is the hydraulic case.
It is installed on the top of the , and this is equipped with separate hydraulic pumps 1 (b) and hydraulic switching valves on both the left and right sides, and the hydraulic pump (goods) and hydraulic switching valve on the left side. is piped to the left hydraulic cylinder device (9), and
The right hydraulic cylinder ■ and the hydraulic switching valve ■ are piped to the right hydraulic cylinder device αQ.

(b) Gle is an operating rod, which is attached to the lower side of the metal fittings M, ftJ whose upper and lower middle portions are pivoted on both left and right sides of the engine stand (3) so as to face forward and downward, and the metal fittings θ.

The upper side of the 'H is connected to the valve shaft of the hydraulic switching valve ■, - through the arm II) and the QK rod So, and the tip side of the operating rod (B) is connected to the valve shaft of the It is configured so that it is kept in contact with the front side of the grounding broad by springs W and e4 on the left and right sides thereof.

When this operating rod (b) is rotated upward, the hydraulic cylinder device (9) and the αQ piston (9b)
.

(10b) protrudes and the wheels (5) and (6) move downward, and conversely, when rotated downward, the piston (9b) and Qo
b) is retracted and the wheels (5) and (6) are moved upward.

Incidentally, in the hydraulic circuit shown in Fig. 4, (Incorporated) is a hydraulic tank. In the upper configuration, seedling planting is in progress, that is, when planting seedlings, the clutch is operated to ``ON'' with the clutch operation lever (to), and the seedling planting tool is placed in the seedling tank handle. When dividing seedlings into individual plants, use wire (
The lock fitting (B) is rotated in the opposite direction of the arrow (A) against the spring OD by the pin (A), and the ground float (2) is
Of course, it can be pitched freely around c), but it also has the ability to roll on the left and right sides.

Therefore, when the pair of left and right running wheels (5) and (6) contact the tiller and rotate to propel the machine, the tiller changes in the front-rear direction and deepens, causing the front part of the ground-contacting float 4 to When moving upward, the rod 63.
The arms an and t4 are rotated via N, and the hydraulic switching valves - are switched so that the pistons (9b) and (10b) protrude. Therefore, the left and right wheels (6),
(6) moves down, the aircraft (1) moves up, and the grounding float (
2) The lower part of the front part is controlled so that the ground pressure of the ground float (2) is in an appropriate state. On the other hand, if it becomes shallow and the front part of the grounding float (2) moves downward, the piston (9b)
, (10b) are switched so that the wheels (6) and (6) move upward, and the ground pressure of the ground contact flow (E1) is controlled to be in a predetermined appropriate state.

When the tiller changes from side to side, the machine body (1) moves from side to side, so naturally if the machine body (1) moves to the left side, the left side of the ground float (E) will move upwards on the surface of the paddy topsoil. The right side moves downward.

Therefore, the left operating lever (B) is pushed up against the spring so that the wheel (5) on this side is moved downward, and conversely, the right operating lever (B) is moved down by the spring so that this right side wheel (5) is moved down. When the wheels (6) of the machine move upward and the left-right direction of the machine body (1) is automatically controlled to be horizontal, the result is K.

In this way, when planting seedlings, the machine (
1) is controlled so that it lies almost horizontally without much movement from side to side, and the running wheels (5)
, (6) are automatically controlled up and down to propel the ground float while maintaining it at a constant ground pressure.

To plant seedlings around the rotating K, when the clutch is turned off using the clutch operating lever (2), the wire is loosened and the locking fitting (b) is rotated in the direction of the arrow (a) by the spring OD. be done. For this reason, the protrusion (to) enters up to the narrow width part K of the locking groove (to), thereby preventing the grounding float (2) from rolling.

Therefore, even if the aircraft (1) turns left and right when turning,
Due to this inclination, the left and right wheels (5) and (6) are not controlled up and down, and the wheel on the troubled side, that is, the side about to turn, moves downward, and the wheel on the opposite side moves downward. It is possible to prevent a situation where the float moves up and becomes unable to turn, and it is also possible to prevent a situation where the grounding float 4 unexpectedly plunges into the soil surface, increasing turning resistance and making turning operation difficult. It goes without saying that the rolling prevention mechanism (2) may be linked to a side clutch lever or other levers operated during turning.

[Effect]

Since this invention has the above-mentioned configuration, the machine body automatically maintains a substantially horizontal position during work without having to move much from side to side.
K is maintained and the wheels are controlled to move up and down according to the depth of the tiller, and the ground pressure of the ground float is maintained within a certain range appropriate for the work. When the operation is stopped, the left and right wheels are not individually controlled up and down, but are stabilized, and the effect is that nine turning operations can be performed.

[Brief explanation of drawings]

The figure shows a walking rice transplanter which is an embodiment of the present invention.
FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a perspective view of the main parts, and FIG. 4 is a hydraulic circuit diagram. Symbols in the figure: (1) is the aircraft body, (6), (6) is the wheel,
<9), QO is a hydraulic cylinder device, (to) is a working machine (rice transplanter), 4 is a grounding float, (to) is a rolling prevention mechanism, □□□. θQ indicates a hydraulic switching valve.

Claims (1)

[Claims] A pair of running wheels (
5) and (6) are provided, and these left and right running wheels (5) and (6) are provided.
) between the pair of left and right running wheels (5),
(6) is configured to independently control vertical movement with hydraulic cylinder devices (9) and (10), and the hydraulic switching valves (45) and (46) of these hydraulic cylinder devices (9) and (10) are
The grounding float (23) switches in the same direction by pitching and reversibly switches by rolling, thereby maintaining the ground pressure of the grounding float (23) within an appropriate range and moving the aircraft (1) in the left and right lateral directions. A rolling prevention mechanism that prevents rolling of the ground float (23) in a paddy field agricultural working machine in which a working machine (18) such as a rice transplanter or a seeding machine is attached to a paddy field running vehicle body that is controlled to be held in a horizontal direction. (33) is provided, and the rolling prevention mechanism (33) is turned on to the transmission of the working machine (18).
, a running device of a paddy field agricultural machine that operates in a locked state due to the disengagement operation of a clutch that is "disengaged".