JPS6018027Y2 - Automatic lifting height control device for the planting section of a rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic lifting height control device for a planting part in a rice transplanter in which the planting part is supported on a traveling body so as to be able to rise and fall freely.

Conventionally, this type of automatic lifting height control device has been designed to control the relative relationship between the traveling part body and the planting part based on the degree of subsidence of the traveling part body due to the depth of the tiller, or the change in the position of the planting part due to unevenness of the rice field. Changes in height were sensed and controlled by the amount of rotation of the float, but it was not possible to control changes in the float's attitude due to factors such as the hardness and softness of the mud in the field and the degree to which the aircraft was tilted up.

For this reason, if the mud in the field is soft, the front part of the float will sink to a large degree, and the front part will tend to go down, so the planting part will be held in a sunken position and the planting depth will become too deep.
On the other hand, when the soil is hard, the front part of the float does not sink as much and the front part tends to rise, so the planting part is held in a floating position and the planting depth tends to be shallow.

Furthermore, since the driving reaction force varies depending on the field condition, the head-up tends to be large in hard fields, and conversely, the head-up tends to be small in singing fields.

Therefore, the present invention is configured so that the fulcrum of the arm of the link device for automatic lifting height control can be changed by a float attitude change lever, thereby making it possible to control changes in the attitude of the float, thereby eliminating the above-mentioned drawbacks. The object of the present invention is to provide an automatic lifting height control device for a planting section in a rice transplanter.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

As shown in FIG. 1, the riding rice transplanter 1 includes a running section 5 consisting of a body 4 supported by front wheels 2 and rear wheels 3, a planting rod 6, a seedling stand 7, and a float 8. Consists of part 10.

The fuselage 4 has an engine mounted on the front part, a bundle 12, a seat 13, a hydraulic manual operation lever 14, a float attitude change lever 15, etc. arranged in the middle thereof, and a spare seedling stand 16 arranged at the rear thereof. Furthermore, at the rear of the body 4, the planting section 10 is supported by an upper link 17a10, a weir link 17b, and a hydraulic cylinder device 18 so as to be movable up and down.

Furthermore, the fuselage 4 is equipped with a hydraulic control device 20,
Hydraulic control device 20 can supply oil to hydraulic cylinder device 18 or drain hydraulic fluid from device 18 .

On the other hand, the rear part of the float 8 of the planting part 10 is pivoted about a fulcrum 23 by a banger 22 provided on the planting part machine frame 21, and the front part is shown in detail in FIG. The arm 25 is rotatably supported via a banger 26 by one end 25a of an arm 25 which is rotatably supported on the machine frame 21 about a fulcrum 24.

The other end 25b of the arm 25 is connected via the link 27 to one end 28a of the arm 28, which is rotatably supported on a fulcrum provided coaxially with the fulcrum on the planting section 10 side of the upper link 17a. ing.

The other end 28b of the arm 28 is connected to the one end 31a of the arm 31, which is pivoted to a fulcrum provided on the same axis as the fulcrum of the upper link 17a on the traveling section 5 side.
It is connected via a link 32 provided parallel to the
The other end 31b of the arm 31 is connected to a link 33.

The other end of the link 33 is connected to one end 36a of an arm 36 that is rotatably supported on a fulcrum 35 provided at one end 15a of the float attitude changing lever 15 that is pivotally supported on the fuselage 4. The conversion lever 15 is a fixing guide 37
can be selectively fixed in multiple positions.

The other end 36b of the arm 36 is connected to a hydraulic control link 38, and the other end of the link 38 is an elongated hole 38a.

The valve operating lever 4 of the hydraulic control device 20 is located in the elongated hole 38a.
A pin 41 located at the tip of one end 40a of the lever 40 is engaged with the lever 40, and the lever 40 is further urged clockwise by a spring 42.

A pin 43 is also provided at the tip of the other end 40b of the lever 40, and the pin 43 is connected to the elongated hole 4 of the hydraulic control link 44 connected to the other end 14a of the hydraulic manual operation lever 14.
4a.

Since the present invention has the above-described configuration, when the planting section 10 is held in a lowered state and the front wheels 2 and rear wheels 3 are rotated to travel on the running section 5, the planting section 10 is pulled by the links 17ai7b. The field surface is leveled by the float 8, and the seedlings on the seedling stand 7 are planted one by one by the planting rod 6.

If the planted field surface 45 is now in a convex state or the traveling tiller 46 is in a concave state, the float 8 is pushed by the mud and its front part is lifted around the fulcrum 23.

The front part of the float 8 is moved by the arm 2 via the banger 26.
5, and further rotates the arm 28 counterclockwise via the link 27.

As a result, the arm 3 on the running section 5 side via the link 32
1 rotates, and further rotates the arm 36, which is pivoted to the fulcrum 35 of the float attitude changing lever 15 fixed at an appropriate position via the link 33, in the clockwise direction, and moves the hydraulic control link 38 to the right side of the drawing. move in the direction.

As a result, the valve actuating tray 40 is rotated counterclockwise via the pin 41 against the spring 42, and the lever 40 is rotated counterclockwise through the pin 41.
from the stop range S1 of the hydraulic control device 20 to the hydraulic pressurization range S
Move to u.

By this movement operation, pressure oil is sent from the hydraulic control device 20 to the hydraulic cylinder device 18, and the hydraulic cylinder device is extended to raise the planting section 10.

At the same time, the float 8 also rises, so the pressure of the mud acting on the front part of the float 8 is eliminated, and the float 8 maintains its normal posture. Therefore, the banger 26, each arm 28, 31,
36 and each link 27, 32, 33, 38, the valve operating lever 40 is rotated to the stop range S1, the extension of the hydraulic cylinder device 18 is stopped, and the planting part 10 is appropriately held in the raised position.

On the other hand, if the planted field surface 45 is concave or the traveling tiller 46 is convex and the front part of the float 8 is lowered around the fulcrum 23, the banger and each arm will move as described above. and a valve actuation lever 40 via each link.
is rotated from the stop range S1 to the hydraulic release range Sd, the oil in the hydraulic cylinder device 18 is discharged to the hydraulic control device 20, and the planting section 10 is lowered.

When the planting part 10 is appropriately lowered, it is held at that position by the same return operation as described above.

At this time, the rotation of the valve operating lever 40 also causes
When the hydraulic manual operating lever 14 is in the lowered (automatic) position as shown in FIG. 2, the elongated hole 44a of the hydraulic control link 44 does not impede movement of the lever 40b.

When the manual operation lever 14 is rotated to the raised position, the pin 43 comes into contact with the end of the long hole 44a of the hydraulic control link 44, and the valve operation lever 40 is rotated counterclockwise against the spring 42. The hydraulic control device 20 is set to the hydraulic pressure range Su, and pressure oil is sent to the hydraulic cylinder device 18 to raise the planting section 10.

Furthermore, when the manual operation lever 14 is placed in the neutral (fixed) position, the end of the long hole 44a of the hydraulic control link 44 holds the valve operation lever 14 at the stop line break 1, and the hydraulic control device 2
0 is stopped, and the planting part 10 is fixed at that position.

Furthermore, when the manual operation lever 14 is rotated to the lower (automatic) position with the planting section 10 in the raised position, the float 8
Since the front part of the is hanging down due to its gravity, the hydraulic control link 38 has moved to the left in the drawing through the banger, each arm, and each link, and the valve operating lever 40
The hydraulic control device 2
0 is hydraulically released cotton [)d, and the planting part 10 is float 8
is located on the rice field 45 and descends until it becomes approximately horizontal.

Note that when this float 8 descends and comes into contact with the rice field 45,
If the mud is hard, the front part of the float 8 will not sink in too much and it will be set to the stop range S1 sooner, and if the mud is no good, the front part of the float 8 will sink and sink to a certain extent, and the stop range will be set later. It tends to be set to S1.

In order to correct this, if the float attitude conversion lever 15 is rotated and fixed, for example, from the solid line in FIG. Ru.

As a result, assuming that the hydraulic control link 38 is at the reference position and does not move, the arm 36 is moved as shown by the chain line, and the link 33 arm 31, link 32, arm 28
, the link 27, the arm 25, and the banger 26 are moved as shown by the chain lines, and the front part of the float 8 is rotated downward by θ degrees to the state shown by the chain lines.

In other words, the stop range S1 is set 0 degrees earlier, and when the mud on the rice field is no good, the tendency of the front part of the float 8 to sink can be corrected.

The float attitude changing lever 15 can be adjusted as appropriate by taking into consideration the degree of subsidence of the front portion of the float 8 due to the hardness and softness of mud in the field and the degree of head-up due to drive reaction force.

As explained above, according to the present invention, the fulcrum 35 of the arm 36 of the link device of the automatic lifting height control device of the planting section 10
can be changed using the float attitude conversion lever 15, and the change in attitude of the float 8 can also be controlled, so that the degree of sinking of the front part of the float 8 due to the hardness and softness of mud in the field and the degree of head-up due to drive reaction force can be controlled. Regardless, the appropriate planting position of the planting section 10 can always be maintained.

Further, it is only necessary to change the position of the fulcrum 35 of the arm 36 of the link device, and the structure is simple and the operation is reliable.

Furthermore, if the float attitude changing lever 15 is provided at a position where it can be operated from the seat 13 of the riding rice transplanter 1, the driver can easily operate it as appropriate without leaving his seat.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a riding rice transplanter to which the present invention is applied, FIG. 2 is a side view showing an automatic lifting height control device according to the present invention, and FIG. 3 is a perspective view of the main parts thereof. 1... (passenger) rice transplanter, 4... body,
5... Running part, 8... Float, 10
... Planting section, 15 ... Float attitude conversion lever, 18 ... Hydraulic cylinder device, 20.
... Hydraulic control device, 25-41 ... Link device, 33 ... Link, 35 ... Fulcrum, 36 ... Arm, 38. ...Hydraulic control link.

Claims (2)

[Scope of utility model registration request] (1) The relative height of the planting section with respect to the traveling section body is sensed by the amount of elevation of the float, and the hydraulic control device is operated via a link device by the elevation and descent of the float, and the hydraulic control device operates the planting section. In a rice transplanter that controls a hydraulic cylinder device for lifting and lowering, the link device is rotatably supported on a fulcrum, and one end of the link device is connected to a link that is linked to a float, and the other end is hydraulically controlled. It has an arm connected to a hydraulic control link that is interlocked with the device, and the fulcrum is installed on a float attitude change lever that can be selectively fixed at any position, and the attitude change lever is operated to change the fulcrum of the arm. An automatic lifting height control device for a planting section in a rice transplanter, which is configured to control changes in the attitude of the float by changing the height of the float. (2) The planting section of the rice transplanter according to claim 1, wherein the rice transplanter is a riding rice transplanter, and the float attitude conversion lever is arranged in a position where the driver can operate it from the seat. Automatic lifting height control device.