JP2583131Y2 - Hydraulic operating device in paddy working machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic operating device for a paddy working machine in which a hydraulic control device for controlling the height of the machine body can be operated with a single operating lever provided on the handle at hand.

[0002]

2. Description of the Related Art In general, a paddy field working machine such as a walking rice transplanter is provided with a hydraulic control device for automatically controlling the height of the body in conjunction with a mechanism for detecting the body height. At the time of running or replenishing seedlings, it is necessary to manually operate the hydraulic control device in order to control the lifting and lowering of the machine body according to the working conditions. Therefore, conventionally, a lever dedicated to hydraulic operation is separately provided, or a hydraulic valve of a hydraulic control device is pulled from two directions in conjunction with two operating levers such as a planting clutch lever and a traveling clutch lever. Etc. are known.

[0003]

[Problems to be Solved by the Invention] However, when a lever dedicated to hydraulic pressure is separately provided, it is necessary to disengage the planting clutch and the traveling clutch when replenishing seedlings, and further lower the body. In the case of pulling the hydraulic valve of the hydraulic control device with two operating levers, it is necessary to use both levers properly to bring the machine down to the seedling replenishing state, so the lever operation becomes very troublesome, In addition, there is a problem that an interlocking structure between the operation lever and the hydraulic control device is complicated. The present invention has been made in order to solve the above-mentioned problems, and the hydraulic control device can be reliably switched with a single operation lever provided on the handle at hand, and the traveling clutch is used when replenishing seedlings. It is an object of the present invention to provide a hydraulic operating device in a paddy working machine having a simple interlocking mechanism capable of bringing an appropriate seedling replenishment state in which the machine body is held at a lowered position only by turning off the machine.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, a technical measure taken by the present invention is to provide a hydraulic control device for the body height, which is linked to the body height detecting mechanism, on the handle handle side. In a paddy field working machine that can be operated by one operation lever, an operation body of a hydraulic valve provided in a hydraulic control device and the operation lever are connected via an operation arm interlocked with the operation lever, and the operation is performed. The hydraulic control device can be semi-automatically moved from the automatic position by pulling the operating arm with the lever,
In addition to switching to the fixed and ascending aircraft control positions, the traveling clutch lever provided on the hand handle side has the operating arm that can control the hydraulic control device only in the downward direction of the aircraft in conjunction with the disengagement operation of the traveling clutch. An interlocking mechanism is provided.

[0005]

According to the present invention, therefore, during the operation of the paddy field, the hydraulic control device automatically controls the height of the vehicle body in connection with the vehicle body height detection mechanism. At this time, if the operating arm is pulled by one operating lever provided on the handle handle side, the operating body of the hydraulic valve is linked to the operating lever, and the hydraulic control device is controlled from the automatic position to semi-automatic, fixed and ascent control. Switch to position. Then, when supplying the seedlings, if the traveling clutch lever is operated to be disengaged, an operating arm that is interlocked with the disengagement operation by an interlocking mechanism provided on the planting clutch lever controls the hydraulic control device only in the machine down direction. Therefore, the seedling replenishment state can be set to an appropriate state only by the operation of disengaging the traveling clutch.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the accompanying drawings. Reference numeral 1 denotes a walking type rice transplanter exemplified as a paddy working machine, in which a float 4 is provided below a body frame 3 on which an engine 2 is mounted on a front part, and left and right wheels supported by a chain case 5 on both sides thereof. 6 are provided. Reference numeral 7 denotes a planting section including a seedling mounting table 8, a planting rod 9, and the like.
Is a hand handle extending upward and rearward. The float 4 has its rear end pivotally supported by the fuselage via a bracket 11 and its front moves up and down to approach the fuselage.
It is designed to be separated.

The chain case 5 is swingable up and down by a rotating shaft 12 provided at a base end thereof, and a rotating arm 13 is projected from the rotating shaft 12. Numeral 14 denotes a hydraulic cylinder disposed in the front-rear direction.
The pivoting arm 13 is connected to both ends of a swinging rod 15 pivotally supported at the tip of the hydraulic cylinder 14 via a connecting rod 16. Simultaneously move up and down to raise and lower the aircraft. When the left and right wheels 6 move up and down in opposite directions along the plow, the swinging rod 15 swings to hold the machine body horizontally. 17 is a stopper for the swinging rod 15.

Reference numeral 18 denotes a hydraulic valve provided in a hydraulic device for expanding and contracting the hydraulic cylinder 14. The operation of the hydraulic device is switched by turning the hydraulic valve 18. Reference numeral 19 denotes a plate-like operating body for rotating the hydraulic valve 18, and the operating body 1
A substantially central portion of the rear end 9 is fixed to the hydraulic valve 18. When the operating body 19 rotates upward, the wheels 6 move up and the machine body descends. When the operating body 19 rotates downward, the wheels 6 move downward. As a result, the fuselage rises, and the middle is a fixed position that supports the fuselage in a neutral manner. Reference numeral 20 denotes a body height detecting mechanism provided on the float 4, and a sensing rod 21 of the detecting mechanism 20 is pivotally supported by a front link 22 of the float 4. One end is connected. A pin 24 is provided at the other end of the rotation link 23, and the pin 24 and a pin 25 provided at the center of the front end side of the operating body 19 are connected via a connection link 26 so that the float 4 can be moved up and down. A hydraulic control device 27 is configured to automatically control the height of the machine body by rotating the operation body 19 by the detection mechanism 20 that has detected the movement. 28 is pins 24 and 25
The springs 29, 30 stretched between the pins 24,
Reference numeral 25 denotes a slotted insertion hole.

The operating body 19 and the handle 10 at hand
Planting clutch lever 31 as an operating lever provided on the side
The operating arm 3 interlocked with the planting clutch lever 31
2 are linked. That is, as shown in FIG. 7, the planting clutch lever 31 is rotatably supported by a support shaft 33 provided on the hand handle 10 side, and a distal end of the planting clutch lever 31 is connected to an operating wire 34 of the planting clutch. At the same time, the hand side is guided by the guide groove 36 of the guide plate 35.
The support shaft 33 is adjacent to the planting clutch lever 31.
A hydraulically actuated lever rotatably supported at the tip of the planting clutch lever 31;
A rod 38 projecting from the lower surface side of 7 protrudes. A U-shaped bracket 39 is provided at the tip of the hydraulic actuation lever 37.
An operating wire 42 is connected via a relief mechanism 41 including a spring 40 and the operating arm 32 to the distal end of the operating wire 42.

Reference numeral 43 denotes a guide groove formed in the operation arm 32. The guide groove 43 is a horizontal portion 43 in the front-rear direction.
a and an arc-shaped portion 4 upward from the tip of the horizontal portion 43a
3b, and the operating body 19 is formed in the guide groove 43.
A locking pin 44 provided at the lower portion on the rear end side is slidably inserted. A cam-shaped portion 45 is formed at the tip of the operation arm 32 so as to be slidable on the hydraulic valve 18 side. When the operating arm 32 is pulled in accordance with the pulling operation of the planting clutch lever 31, the cam-shaped portion 45 slides on the hydraulic valve 18 side to position the operating arm 32, and at this position, the guide groove 43 of the operating arm 32 is moved. The operating range of the operating body 19 is restricted, that is, the planting clutch lever 31 is moved in the guide groove 36 in FIG.
1, the cam-shaped portion 45 of the operation arm 32 is separated from the hydraulic valve 18 as shown in FIG. The locking pin 44 is connected to the horizontal portion 43a of the guide groove 43.
Position A which slides freely over the arc-shaped portion 43b from the
When the planting clutch lever 31 is pulled beyond the disengagement position, the rod 38 comes into contact with the hydraulic operating lever 37 and is turned upward, and the operating wire 42 is pulled to cause the cam-shaped portion 45 to slide on the hydraulic valve 18. 2 (a), in which the locking pin 44 is slidable only within the arcuate portion 43b, and the lower semi-automatic position B in which the operating body 19 rotates only in the lowering direction of the body. Become. Further, if the handle 4 is lifted to place the float 4 in a so-called nose state and the planting clutch lever 31 is set to the semi-automatic position, the locking pin 44 of the operating body 19 rotated in the lifting direction of the machine body becomes the FIG. As shown in (5), it is a semi-automatic raising that moves only within the width of the horizontal portion 43a. Next, when the planting clutch lever 31 is pulled from the semi-automatic position B, as shown in FIG.
5 comes into sliding contact with the lower surface of the hydraulic valve 18, and the locking pin 44 comes into contact with the upper end of the arc-shaped portion 43b immediately below the hydraulic valve 18 so as to be in the fixing position C for securely fixing the operating body 19 to the neutral position. When the planting clutch lever 31 is further pulled beyond the fixed position C, as shown in FIG.
b, the locking pin 44 in contact with the operating body 19 is pulled rearward.
Is located at an ascending position D in which the airframe rotates downward, and the body can be lifted.

On the outer periphery of the hydraulic valve 18, a rotating collar 46 that is freely rotatable is mounted.
Are smoothly slidably in contact with the hydraulic valve 18 via the collar 46 for rotation. A return spring 47 is stretched between the upper rear end of the operation body 19 and the machine body side, and the return spring 47 urges the operation body 19 to rotate only in the lowering direction of the machine body. I have. 48 is a spring for removing the slack of the operation wire 42, and 49 is a stopper of the operation arm 32.

Reference numeral 50 denotes a traveling clutch lever provided in parallel with the planting clutch lever 31;
Reference numeral 0 is also rotatably supported by the support shaft 33, and an operation wire 51 of the traveling clutch is connected to a tip end thereof, and a hand side is guided by a guide groove 52. A rod 53 facing the lower surface side of the hydraulic actuating lever 37 is protruded from the tip of the traveling clutch lever 50,
When the traveling clutch lever 50 is pulled from the entry position of the leading end of the guide groove 52 beyond the disengagement position, the rod 53 comes into contact with the hydraulic operation lever 37 and rotates upward, and the hydraulic control device 27
Is operated only in the lowering direction of the fuselage. When the traveling clutch is disengaged, the power transmitted to the planting section 7 is cut off as in the conventional case. Numeral 54 denotes a positioning plate fixed to the machine body side.

In the above configuration, if the planting clutch lever 31 is pulled during the paddy field operation, the hydraulic control device 27 can be switched from the automatic position to the semi-automatic, fixed and ascending machine control positions according to the working conditions. . In the above-described series of operation steps, the operating arm 32 positioned by the cam-shaped portion 45 slidably in contact with the hydraulic valve 18 regulates the operating range of the operating body 19, and the operating body 19 is urged downward by the return spring 47. Therefore, the switching operation can be reliably performed only by the pulling operation of the planting clutch lever 31, and the interlocking mechanism between the planting clutch lever 31 and the hydraulic control device 27 becomes extremely simple. And at the time of seedling replenishment, if the running clutch lever 31 is turned off,
In conjunction with this, the hydraulic control device 27 controls the machine only in the lowering direction, so that the machine can be stably held at the lowered position and the seedlings can be smoothly supplied.

[0014]

In summary, the present invention relates to a paddy field working machine in which a hydraulic control device for a body height linked to a body height detecting mechanism can be operated by a single operating lever provided on a hand handle. The operating body of the hydraulic valve provided in the hydraulic control device is connected to the operating lever via an operating arm interlocked with the operating lever, and the hydraulic control device is automatically positioned by pulling the operating arm by the operating lever. To the semi-automatic, fixed and ascending aircraft control positions, and the traveling clutch lever provided on the hand handle side,
An interlocking mechanism is provided that enables the operating arm to control the hydraulic control device only in the lowering direction of the machine in conjunction with the disengagement operation of the traveling clutch. Therefore, the hydraulic control device can be operated only by pulling the operating arm using the operating lever. Can be switched to the machine control position according to the above, so that the interlocking structure between the operation lever and the hydraulic control device can be simplified. Moreover, at the time of replenishing seedlings, if the running clutch is turned off,
The operation arm can control the hydraulic control device only in the lowering direction of the machine by an interlocking mechanism provided on the traveling clutch lever, and holds the machine in a stable lowering position, so that operations such as replenishing seedlings can be easily performed. .

[Brief description of the drawings]

FIG. 1 is a side view of a main part.

FIG. 2 is an operation explanatory view.

FIG. 3 is an operation explanatory view subsequent to FIG. 2;

FIG. 4 is a plan view of an operation lever.

FIG. 5 is a rear view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is an enlarged perspective view of the same.

FIG. 8 is an overall side view of the paddy working machine.

FIG. 9 is a partial plan view of the same.

FIG. 10 is a partial side view of the same.

FIG. 11 is a rear view of the same part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hand handle 18 Hydraulic valve 19 Operating body 20 Body height detecting mechanism 27 Hydraulic control device 31 Operating lever 32 Operating arm 50 Traveling clutch lever E Interlocking mechanism

Claims (1)

(57) [Scope of request for utility model registration] An oil pressure control device for a paddy field working machine, wherein a hydraulic control device of a body height linked to a body height detection mechanism can be operated by a single operation lever provided on a handle at hand. The operating body of the hydraulic valve and the operating lever are connected via an operating arm interlocking with the operating lever, and the hydraulic control device is semi-automatically fixed, fixed and raised from the automatic position by pulling the operating arm by the operating lever. In addition to switching to each aircraft control position, the traveling clutch lever provided on the handlebar side has an interlocking mechanism that enables the operating arm to control the hydraulic control device only in the direction of lowering the aircraft in conjunction with the disengagement operation of the traveling clutch. A hydraulic operating device in a paddy working machine, wherein the hydraulic operating device is provided.