JP2911705B2 - Hydraulic operation mechanism 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 paddy field working machine in which a hydraulic control device of a machine height can be positioned at a desired machine control device only by operating a single operating lever provided on a handle at hand. It relates to the hydraulic operating mechanism in the above.

[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 that automatically controls the height of the machine body in conjunction with a machine height detection mechanism. At the time of replenishing seedlings or the like, 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, there has been known a type in which a lever dedicated to hydraulic operation is separately provided, or a type in which a hydraulic control device is operated in conjunction with two operation levers such as a planting clutch lever and a traveling clutch lever.

[0003]

However, in the case where a lever dedicated to hydraulic operation is separately provided, for example, in the case of circling the body, the planting clutch lever is disengaged at the same time that the planting clutch lever is disengaged, and the hydraulic operation is exclusively performed. It is necessary to operate the levers to raise the aircraft, and in the case of operating the hydraulic control device with two operation levers, two operation levers are required for each operation, such as circling the aircraft or replenishing seedlings. In any case, there is a problem that manual operation becomes very troublesome and the whole structure becomes complicated. SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a hydraulic control device can be reliably positioned at a desired machine control position only by an operation from one direction with a single operation lever provided on a hand handle. It is an object of the present invention to provide a simple hydraulic operating mechanism having a structure that can be positioned at a predetermined position.

[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 a body height, in which a hydraulic valve is operated in connection with a body height detecting mechanism. In the paddy field working machine, the operating body of the hydraulic valve and the operating lever provided on the hand handle side are connected to each other via an operating arm interlocked with the operating lever, and the operating arm is slid in contact with the hydraulic valve. A cam-shaped portion that regulates the movement of the operating arm and a guide groove that regulates the movement of the operating body corresponding to the regulated position of the operating arm are formed, and the cam-shaped portion is operated by a hydraulic valve with the operation of the operating lever. The hydraulic control device can be positioned from an automatic position to a semi-automatic, fixed, and ascending body control position by an operating arm that slides toward the side.

[0005]

Therefore, according to the present invention, during the paddy field operation, the hydraulic valve of the hydraulic control device is operated in conjunction with the detection of the body height detecting mechanism to automatically control the height of the body. At this time, if the operation lever provided on the handle handle is operated, the operation arm interlocked with the operation lever is restricted in movement by the cam-shaped portion slidingly contacting the hydraulic valve, and the operation arm is moved to the operation arm corresponding to the regulated position. The formed guide groove regulates the movement of the operating body. Then, the operation arm is sequentially controlled in position with the operation of the operation lever, and the movement of the operation body is controlled by the hydraulic valve. The hydraulic control device is moved from the automatic position to each of the body control positions of semi-automatic, fixed and ascending. Position.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An 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 field working machine, in which a float 4 is provided below a body frame 3 on which an engine 2 is mounted at a front portion, 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 detection mechanism for detecting the body height provided on the float 4, and the detection rod 21 of the detection mechanism 20 includes:
The float 4 is pivotally supported by a front link 22, and one end of a rotation link 23 is connected to an upper end of the sensing rod 21. 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, in which the detection mechanism 20 that detects the movement rotates the operation body 19 to automatically control the height of the machine body. 28 is a spring stretched between the pins 24 and 25, and 29 and 30 are pins 24 and 2
Reference numeral 5 denotes an elongated 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 an operation wire 34 of the planting clutch is connected to the distal end thereof. Along with
The hand side is guided by the guide groove 36 of the guide plate 35. Reference numeral 37 denotes a hydraulically actuated lever which is rotatably supported on the support shaft 33 adjacent to the planting clutch lever 31,
A rod 38 projecting from the tip of the planting clutch lever 31 faces the lower surface of the hydraulic operating lever 37. An operating wire 42 is connected to a distal end of the hydraulic operating lever 37 via a relief mechanism 41 including a U-shaped bracket 39 and a spring 40, and the operating arm 32 is attached to the distal end of the operating wire 42. Have been.

Reference numeral 43 denotes a guide groove formed in the operation arm 32, and the guide groove 43 is formed in the horizontal portion 4 in the front-rear direction.
3a and an arc-shaped portion 43b extending upward from the tip of the horizontal portion 43a.
A locking pin 44 provided at the lower portion of the rear end 9 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 operation arm 32 is pulled in accordance with the operation of the planting clutch lever 31, the cam-shaped portion 4
5 slides against the hydraulic valve 18 side to restrict the movement of the operating arm 32, and the guide groove 43 restricts the movement of the operating body 19 corresponding to the restricted position. When the guide groove 31 is located between the on position and the off position of the guide groove 36 shown in FIG. 5, the cam-shaped portion 45 of the operating arm 32 is separated from the hydraulic valve 18 in FIG.
, The locking pin 44 of the operating body 19 which rotates in connection with the detection mechanism 20 is in the automatic position A in which the locking pin 44 freely slides from the horizontal portion 43a of the guide groove portion 43 to the arc-shaped portion 43b, and the cutting position. If you pull the planting clutch lever 31 beyond
The rod 38 comes into contact with the hydraulic operating lever 37 and is rotated upward, and the operating wire 42 is pulled to bring the cam-shaped portion 45 into sliding contact with the hydraulic valve 18 as shown in FIG. 44 becomes slidable only by the arc-shaped portion 43b, and becomes the lower semi-automatic position B in which the operating body 19 rotates only in the lowering direction of the body. Also, 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 that has been turned in the body lifting direction is shown in FIG. As shown in (5), it is a semi-automatic raising that moves only within the width of the horizontal portion 43a. Then, when the planting clutch lever 31 is pulled from the semi-automatic position B, as shown in FIG. 2 (c), the cam-shaped portion 45 comes into sliding contact with the lower surface of the hydraulic valve 18, and the locking pin 44 is placed in a circle just below the hydraulic valve 18. When the planting clutch lever 31 is pulled beyond the fixed position C by contacting the upper end of the arcuate portion 43b to securely fix the operation body 19 to the neutral position, as shown in FIG. The locking pin 44 abutting on the arc-shaped portion 43b is pulled rearward so as to be in a raised position D where the operating body 19 rotates downward.

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. 47 is a return spring stretched between the upper rear end side of the operation body 19 and the machine body side;
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 the tip of the support shaft 33, and the hand side is guided by the guide groove 52. A rod 53 facing the lower surface of the hydraulic operating lever 37 is protrudingly provided at the distal end of the traveling clutch lever 50. The traveling clutch lever 50 is pulled from the entry position of the guide groove 52 to the disengagement position to engage the traveling clutch. When the rod 53 is further pulled after being cut, the rod 53 comes into contact with the hydraulic operating lever 37 and is rotated upward, so that the hydraulic control device 27 can be lowered semi-automatically, which is operated only in the lowering direction of the body. Numeral 54 denotes a positioning plate fixed to the machine body side. The positioning plate 54 has a rod 3 protruding from the planting clutch lever 31.
8 is formed with a locking recess 55 for locking at each control position.

In the above configuration, when the paddy clutch is engaged in performing paddy work, the planting clutch lever 31 is in the automatic position A.
7 automatically controls the height of the aircraft. If the planting clutch lever 31 is set to the semi-automatic position B during the supply of seedlings during the operation, the machine is controlled only in the lowering direction, so that the machine can be in a stable and low state. When supplying seedlings,
When the travel clutch lever 50 is turned off, the rod 38
Alternatively, the hydraulic operating lever 37 can be turned into a semi-automatic state automatically by rotating the hydraulic operating lever 37. In addition, float 4
If the nose is set to the semi-automatic position, the aircraft is controlled only in the upward direction and does not inadvertently descend, so that it can safely travel. Further, if the pulling clutch lever 31 is operated as it is, the machine body can be completely fixed at a desired position. When crossing a ridge or traveling on a road, the machine body can be raised only by further pulling the planting clutch lever 31. Can be. In the above-described series of hydraulic operation processes, the cam-shaped portion 4 formed on the operation arm 32 is formed.
5 slides against the hydraulic valve 18 side to restrict the movement of the operating arm 32, so that the hydraulic control device can be reliably positioned at each machine control position only by pulling the planting clutch lever 31 from one direction. Thus, the overall structure can be made extremely simple. Further, since the cam-shaped portion 45 is in sliding contact with the hydraulic valve 18 via the turning collar 46, the feeling when operating the planting clutch lever 31 can be improved.

[0014]

In short, the present invention relates to a paddy working machine provided with a body height hydraulic control device in which a hydraulic valve is operated in connection with a body height detecting mechanism. A cam-shaped part for controlling the movement of the operation arm by slidingly contacting a hydraulic valve with the operation arm, the operation arm being linked to an operation lever provided on the side of the operation lever; A guide groove that regulates the movement of the operating body corresponding to the regulating position of the actuator, and the cam-shaped part slides on the hydraulic valve side with the operation of the operating lever. Since the robot can be positioned at the semi-automatic, fixed, and ascending control positions, the cam-shaped part that slides into contact with the hydraulic valve is moved by the operation of the operation lever provided on the handlebar. The guide groove regulates the movement of the operating body in accordance with this regulation position, so that the hydraulic control device can be semi-automatically fixed, fixed, and raised from the automatic position only by operation from one direction with one operating lever. Positioning can be reliably performed at each aircraft control position. Moreover, since only one operating lever and the operating body of the hydraulic valve need only be connected via the operating arm, the entire structure can be simplified with a small number of parts.

[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 43 Guide groove 45 Cam-shaped part

Claims (1)

(57) [Claims] 1. A paddy working machine provided with a body height hydraulic control device in which a hydraulic valve is operated in connection with a body height detection mechanism, wherein an operating body of the hydraulic valve and an operating lever provided on a hand handle side are provided. And a cam-shaped portion that slides on a hydraulic valve to regulate the movement of the operating arm, and that corresponds to a regulating position of the operating arm. A guide groove that regulates the movement of the operating body is formed, and the cam-shaped part slides on the hydraulic valve side in accordance with the operation of the operation lever. A hydraulic operation mechanism in a paddy working machine, wherein the hydraulic control mechanism can be positioned at a machine control position.