JPS6265611A - 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 [Industrial Field of Application] The present invention relates to an agricultural machine for paddy fields, such as a rice field WU machine.

[Prior art] A rice paddy wheel is provided with a pair of left and right paddy wheels and a pair of left and right hydraulic drive devices that individually raise and lower the paddy wheels, and the base of the hydraulic drive device is provided so as to be rotatable about an intermediate portion as a fulcrum. There are agricultural machines for paddy fields connected to both ends of the balance rod. This type of agricultural machine for paddy fields has the advantage that the unevenness of the tiller is absorbed by the rocking of the balance rod, so there is little wobbling of the machine while it is running.

[Problems to be solved by the invention] However, the agricultural machine for paddy fields having the above-mentioned balance rod,
There was a problem in that it became difficult to drive when turning. In other words, at the initial stage of turning, the balance rod swings faster than the hydraulic drive device for controlling the vertical movement of the wheels operates.
The combination of the swinging of the balance rod and the horizontal control operation by the hydraulic drive system caused complicated movements in the lifting and lowering of the wheels, which could cause running problems such as the aircraft swinging from side to side.

Means for Solving Problem E] In order to solve the above problems, the present invention has the following configuration. That is, the rice field agricultural machine according to the present invention is characterized by being provided with a locking device that can fix the balance rod as necessary so that the bases of the left and right hydraulic drive devices are aligned.

[Function] By activating the locking device as necessary when turning, etc., and fixing the balance rod with the base of the drive device aligned,
The vertical control movements of both the left and right wheels are centered. As a result, the occurrence of running obstacles and the like is prevented, and smooth turning can be performed.

[Examples] Examples shown in the drawings will be described below. This paddy field agricultural work machine 1 is a rice transplanter, and is equipped with a pair of left and right sensor floats 3 and 3' at the lower front of the machine body 2, and paddy wheels 5 and 5' are respectively provided on the sides of the floats. ing. A prime mover 7 is provided at the front of the aircraft 2.
A transmission case 8 of the planting part and a handle 9 whose base is fixed to the transmission case are provided at the rear end. And rear floats 10(A), 10(
A').

10(B) is provided. Rear float 10 (^)
.

Side floats 10 (A') are provided on both the left and right sides of the planting section, and only one rear float 10 (B) is provided in the center. These rear floats 1
0 is rotatably attached to the intermediate portion or the seedling planting portion of the body 2 by a shaft 10a, and the front end is suspended from the body 2 by an expansion/contraction link 10b so as to be vertically movable within a predetermined range. A transmission case 11 of the running section is provided in the middle part of the fuselage 2,
This transmission case 11 is provided with a drive shaft 13 that projects left and right. Rotational power from the driving force I17 is transmitted to the drive shaft 13 via the transmission PR side in the transmission case 11. At both ends of the drive shaft 13 are sprocket wheels 17. housed in a pair of left and right cheno cases 15.15.
17 are installed. The Cheno case 15 is attached to the end of a rotatable cylindrical housing 14 that houses the drive shaft 13, and the other end of the Cheno case 15 supports the axle 19 of the paddy wheel 50. Sprocket wheels 2 attached to these axles 19
0 is connected to the sprocket wheel 17 by the chain wheel 21, and transmits rotational power from the drive shaft 13 to the wheel 5.5'.
It is designed to rotate.

The seedling planting section is provided with a seedling tank 23 and a planting rod 25. A claw 25a h'M') is provided at the tip of the planting rod 25, and during rice planting, the claw 25a moves up and down in an elliptical orbit and is held in the seedling tank 23, which reciprocates laterally. The system is structured so that seedlings are separated from the seedling mat and then planted in the field.

Hydraulic cylinder 30°30 as a drive device for lifting and lowering wheels
' are arranged on both sides of the fuselage 2, and their respective bases are pivotally attached to both ends of a balance rod 31 provided at the front end of the fuselage 2, and the respective piston rods 30a, 3
0a' is connected to the tip of an arm 14a projecting from the top of the housing 14 for the drive shaft 13. Balance rod 3
1 is supported by a support shaft 31a provided at the front end of an engine stand 7a on which the prime mover 7 is placed, so as to be rotatable back and forth about its center. These hydraulic cylinders 30, 30' are expanded and contracted by hydraulic pressure from a hydraulic device 32 installed in the center of the machine body, and raise and lower the paddy wheels 5, 5' through the rotation of the chenoke case 15.

A camshaft 34 supported by a cylindrical support member 33 is provided at the rear of the balance rod 31, and eccentric cams 35, 35' are integrally attached to both ends of the camshaft 34.

A lock cylinder 36 for rotating the eccentric cam is connected to one eccentric cam 35'.

The lock cylinder 36 has a base pivotally connected to the side of the body behind the eccentric cam 35', and is connected to the eccentric cam 35' by a bifurcated connector 37 fixed to the tip of the piston rod 36a.
It is pivoted to. As shown in FIG. 4, when the lock cylinder 36 is contracted, the eccentric cams 35',
35 is separated from the balance rod 31 by a certain distance or more, but when the lock cylinder 36 extends, the eccentric cam 35
', 35 rotates about the camshaft 34 in the six directions of arrows, and the large diameter part 35a' (35a) of the eccentric cam comes into contact with the rear surface of the balance rod 31. These eccentric cams, lock cylinders, etc. constitute a locking device for the balance rod.

The sensor float 3 (
3') has a rear part pivoted to the body 2 so as to be vertically movable, and a front part supported in a suspended state by a detection rod 40. The upper end of the detection rod 40 is pivotally connected to the middle part of a vertically rotatable val J-arm 42 whose front end is pivotally connected to the body 2. A free end of the valve arm 42 is connected to one end of a generally U-shaped pivot arm 45 via a connecting rod 44 . The other end of the rotating arm 45 is connected to the valve shaft 47 (47') of the switching valve V (V') of the hydraulic device 32.
) is fixed. Note that the rotating arm 45 is pulled rearward by a spring 49 stretched between it and a mounting plate 48 provided on the body side.

Matoko, left and right glue [] -to 10 (A), 1
A tilt sensor is provided at 0(8') for detecting whether or not the float is in contact with the ground.

This tilt sensor (751, 51') is linked to the solenoid 52 for switching the valve of the lock cylinder 36, and when it detects that at least one of the night marks has moved forward from the topsoil surface, the lock cylinder 36 The valve is configured to switch in the direction in which the valve extends.

Hydraulic system 32 (well, it is equipped with a pair of left and right switching valves V, v', and these switching valves v, v' are respectively connected to corresponding hydraulic cylinders 30, 30'. Therefore, the left and right hydraulic pressure The cylinder 30.30' has a switching valve v,
The wheels 5 and 5' are expanded and contracted independently of each other by the switching operation of v', and the wheels 5 and 5' are moved up and down through the rotation of the chain case 15 and 15.

In the figure, 62 is a hydraulic tank, 63, 63' is a hydraulic pump, and 64 is a drive shaft for transmitting rotational power to the hydraulic pump.

When this rice planting ta1 is used in a paddy field, the wheels 5°5' move on the v1 board, causing the body 2 to move in the advancing direction. At this time, each float slides along the topsoil surface due to its buoyancy. Here, for example, when the plane 11 becomes lower, the fuselage 2 descends, but the float remains at a constant height, so the sensor float 3 (3') moves upward relative to the fuselage 2. Then, the detection rod 40 is lifted, and the valve shaft 47 (47') is rotated in the direction of the arrow X via the valve arm 42, the connecting rod 44, and the rotating arm 45.

Therefore, the switching valve V (V') of the hydraulic device 32 is switched to the direction of extending the hydraulic cylinders 30 (30M) on each side, rotating the chain case 15 downward and lowering the wheel 5 (5'). On the other hand, when the tiller becomes higher, the sensor float 3 (3') moves downward, so the valve shaft 47 (47') is turned in the opposite direction of the arrow X, and the hydraulic cylinder 30 (3ON) contracts. and move the wheel 5 (5') to the upper arm.

When the height of the sensor float 3 (3') relative to the body reaches a predetermined height due to the vertical movement of the wheels, that state is maintained.

Next, when turning in the field, etc., use the operating lever 70 at hand to control the valve V of the drive unit @30.30'.

When V' is switched and the aircraft 2 is lifted, the sight floats 10 (A) and 10 (8') may move away from the topsoil surface, but at this time the inclination sensor 51, 51' activates the solenoid 52 and locks. Extend the cylinder 36.

Then, as described above, the eccentric cams 35 and 35' are pressed against the left and right intermediate portions of the balance rod 31, so that the balance rod 31 is fixed in a state perpendicular to the direction of movement. That is, the left and right hydraulic drive devices 30, 30' are
It is fixed in a state where the bases of the two are aligned in the front and back. Therefore, the horizontal control operation by the balance rod 31 is restrained, and the inner wheel does not sink into the 11th wheel at the beginning of a turn, allowing smooth operation.

When the aircraft completes a turn and descends, the solenoid 52 switches, contracts the lock cylinder 36, and locks the balance rod 31.
becomes free again.

Field 41i of this example! The i-machine 1 is configured to retract the lock cylinder 36 due to the stomach descent motion of the aircraft, but it is equipped with a lever or the like that allows manual operation to lock and release the balance rod 31. The lever may be used to lock and release the balance rod as necessary when turning or the like.

Further, as a means for locking and releasing the locking lever 31, other suitable means other than the lock cylinder may be used.

"Effects of the Invention" As is clear from the above description, the rice field agricultural machine according to the present invention can fix the balance rod with the base of the hydraulic drive device that controls the vertical movement of the wheels aligned. Therefore, it is possible to restrict the function of the balance rod when turning, etc., and the running speed ↑1 during turning (l) etc. is improved.

[Brief explanation of drawings]

FIG. 1 is a side view of an example of the agricultural machine for rice fields according to the present invention, FIG. 2 is a plan view thereof, FIGS. 3 and 4 (a),
(b) is an enlarged view of the main part.

Claims (1)

[Claims] (1) A balance rod that is equipped with a pair of left and right paddy wheels and a pair of left and right hydraulic drive devices that individually raise and lower the paddy wheels, and the base of the hydraulic drive device is rotatable about the middle part as a fulcrum. A paddy field agricultural machine is connected to both ends of the rice field, and is characterized by being provided with a locking device that can fix the balance rod as necessary so that the bases of the left and right hydraulic drive devices are aligned. An agricultural machine for paddy fields.