JPH06101961B2 - Walk-behind rice transplanter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a walk-behind rice transplanter equipped with a hydraulic cylinder device for correcting an inclination of a body.

[0002]

2. Description of the Related Art As a conventional technique of this kind, Jitsuko Sho 51
As shown in Japanese Patent Publication No. 49301, a prime mover mounting table is provided substantially parallel to a frame provided at a rear portion of a mission case, and a relatively high position above the frame behind the prime mover mounted on the prime mover mounting table. There is one that is equipped with a hydraulic cylinder device that corrects the left-right inclination of the aircraft.

[0003]

In the conventional example described above, since the hydraulic cylinder device is provided at a relatively high position above the frame behind the prime mover, the center of gravity of the machine is high and the running stability is poor. It was

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention is a frame in which a prime mover is mounted on a prime mover mounting table mounted on the front part of a mission case and connected to the rear part of the mission case. A planted transmission case is provided in the rear part, and wheels are attached to the rear part of the left and right transmission case where the base part is pivotally attached to the left and right sides of the mission case and the rear part can move up and down, and the tilt of the aircraft in the left-right direction is detected. In a walk-behind rice transplanter equipped with a hydraulic cylinder device that corrects the tilt of the machine by moving the wheels up and down by detecting the machine inclination of the sensor, the upper surface of the prime mover mounting table is provided in an inclined shape in which the front is lower than the frame. Provided so that the left and right end sides of a connecting body for connecting the left and right wheels project from holes provided in the left and right side surfaces of the prime mover mounting table, and the bases of the left and right end sides of the connecting body and the left and right transmission cases, respectively. The left and right arms attached to the left and right arms of which the tip side protrudes upward are connected to the left and right sides of the prime mover mounting table so that the left and right wheels can move up and down. It is a walking type rice transplanter characterized by being equipped.

[0005]

According to the present invention, the position of the prime mover can be lowered by mounting the prime mover on the prime mover mounting base whose upper surface is inclined with respect to the frame so that the front is lower. Since the left and right ends of the connecting body that connects the left and right wheels project from the holes provided on the left and right side surfaces of the mounting table, the internal space of the prime mover mounting table can be effectively used and the position of the connecting body is also a low position of the machine body. Can be placed in Furthermore, the hydraulic cylinder device for correcting the tilt of the machine body is located at a relatively low position laterally of the prime mover mounting table, so that the center of gravity of the machine body can be lowered as a whole,
It is possible to obtain a walk-behind rice transplanter capable of propelling with good traveling stability while appropriately controlling the inclination correction of the body.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. Reference numeral 1 denotes a traveling vehicle body, and a mission case 2 and a prime mover mounting table 3 attached to a front portion of the mission case 2.
And a frame 4 attached to the rear of the mission case 2
Etc.

5 is a prime mover, 6 is a fuel tank, 7a and 7b
Is a hydraulic pump case. Reference numerals 8a and 8b denote transmission cases, the base of which is pivotally attached to a boss portion which houses a drive shaft projecting to the left and right sides of the transmission case 2 so that the front end side is located rearward and the vertical movement is free. Wheels 9a and 9b are supported on the transmission cases 8a and 8b, and are vertically movable while being rotated by transmission.

Reference numeral 10 denotes a connecting body, and a reinforcing metal fitting 11 is attached to the front side portion of the prime mover mounting base 3, and a left and right intermediate portion is pivotally attached to the metal fitting 11 by a pin 12 so that the side plate of the prime mover mounting base 3 and the metal fitting 11 are attached. An elongated hole 13 is formed in the side plate portion, and the elongated hole 13 is inserted into the elongated hole 13 so that the left and right end sides are projected outward, and can be swung in a balance shape within a certain range. 14a ・ 14b
Is a hydraulic cylinder device between the left and right outer ends of the connecting body 10 and the arms 16a and 16b integrally attached to the pivot metal 15a and 15b attached to the base side of the transmission cases 8a and 8b. Is installed in the. That is,
The coupling metal fittings 17, 17 attached to the connecting body 10 are provided with a shaft 19a and a cylinder 1 which are always provided in a direction in which the springs 18, 18 are extended.
9b is attached, the base of the cylinder is attached to the extender 19, and the piston tip is pivotally attached to the arms 16a and 16b. When the piston projects, the wheel on that side is moved downward. At this time, force is also applied to the counterpart wheel via the springs 18, 18, the cylinder device and the like.

Explaining the hydraulic system A, a hydraulic tank 20 is provided in the middle portion on the left and right, and hydraulic pumps 21a
21b and hydraulic switching valves 22a and 22b are integrally assembled, and hydraulic pump cases 7a and 7b are integrally mounted, and a hydraulic device A is mounted on the upper front side of the transmission case 2. Of course, the hydraulic device A may be provided on the prime mover mounting table 3 on the rear side of the prime mover 5. Reference numerals 23a and 23b are hydraulic pressure switching levers.

Reference numerals 24a and 24b are left and right ground contact floats which function as sensors for detecting the inclination of the machine body in the left-right direction with respect to the field scene. Crank-shaped pipes 25a and 25b, which are independently pivoted, are fitted with metal fittings 26.2
A support shaft 27.2 which is vertically movable via 6 and whose rear portion is attached to the outside of the pivot axis of the transmission cases 8a and 8b.
It is hung so that it does not move down below a certain level from 7 through the connecting members 28.

Reference numeral 29, 29 is a connecting rod for connecting the grounding floats 24a, 24b and the hydraulic pressure switching levers 23a, 23a, and a buffer spring 30.
30 and a turnbuckle 31 for adjusting expansion and contraction are interposed. When the grounded floats 24a and 24b move upward, the hydraulic pressure switching valves 22a and 22b are switched so that the pistons of the hydraulic cylinder devices 14a and 14b project.

Reference numeral 32 is a grounding float, and 33 and 33 are side grounding floats, which are provided so that the front side can move up and down with the rear side as a fulcrum. 34 is a rice transplanter,
It is connected to the rear portion of the frame 4. Explaining this, 35 is a planted transmission case, in which a cylindrical case 35b is projected on both left and right sides of the main case part 35a, and sub case parts 35c, 35c are provided on this.

Numerals 36, 36 ... Are seedling planting devices, which are attached to the left and right sides of the main case 35a and the inner parts of the left and right sub cases 35c and 35c by a crank and a swing arm. 37 is a frame for mounting the handle. 38 is a steering wheel. Reference numeral 39 denotes a seedling tank, which is supported on the upper part of the control handle 38 so as to be capable of laterally reciprocating lateral movement, and a reciprocating lateral movement device in the planted transmission case 35 is provided with a moving rod 40 and a metal fitting 4.
It is attached via 1 and is configured to be laterally reciprocated laterally.

A seedling receiving device 42 having a seedling dividing port is provided on the front side of the seedling tank 39, and the seedling planting devices 36, 36 ... Divide the seedlings from the seedling dividing port. There is. The grounding float 32 and the side grounding float 33.3
The rear part is pivotally attached to the shaft 44, which is pivotally adjusted by the adjusting lever 43, by the arm 45, and the front part is the frame 4.
And the sub-cases 35c and 35c are attached by hanging tools 46, 47 and 47. Reference numerals 48 and 48 denote wheel mark erasing bodies, and in the illustrated example, a base portion is rotatably attached to the shaft 44 through a metal fitting. The eraser is made of a rubber plate.

Reference numeral 49 denotes a sensing adjustment lever, which is provided on an operation panel 50 attached to the control handle 38 so as to be capable of turning adjustment setting. One end of a wire 51 attached to the lever 49 is integrally formed with the hydraulic tank 20. Attached support frame 52
Is connected to an arm 54 that is integrally rotatably mounted on a shaft 53 and is fixed to both left and right ends of the shaft 53.
b and the hydraulic pressure switching levers 23a and 23b are respectively provided with springs 5
6a and 56b are connected, and the hydraulic pressure switching valves 22a and 22b are connected.
The switching resistance is changed by the tension of the springs 56a and 56b.

Reference numeral 57 is a clutch operating lever which is also used as a hydraulic operating lever. Reference numeral 58 is a seedling planting clutch, which is a fixed-position stop clutch, and a cam 60 with a clutch claw for urging the spring 59 to elastically engage with a claw provided on the side surface of the gear 59 is attached to the rotary shaft. A clutch pin 61 is provided which is pressed against the cam 60 by a spring and abuts on the cam 60 to disconnect the clutch. And this clutch pin 6
1 is linked to the clutch operating lever 57 by a wire 62.

Reference numeral 63 denotes a switching valve simultaneous operation mechanism for switching the hydraulic pressure switching levers 23a and 23b in a direction to pull up the left and right ground floats 24a and 24b at the same time and lowering the left and right wheels 9a and 9b together. A pair of left and right cylindrical bodies 65a.
5b is fastened to the hydraulic pressure switching lever 23a.
3b is fitted with the pins 66a and 66b, one end of which is loosely attached, and the tip of the pins 66a and 66b is urged by springs 67a and 67b of strong tension to push in the operating plate 68 provided in a metal fitting. The metal fitting 64 is pivotally attached to the clutch operating lever 64 and is connected to the clutch operating lever 57 by a wire 69. The clutch operating lever 57 is inserted into the guide hole 50a of the panel 50 attached to the steering handle 38, the seedling planting clutch 58 is "ON" at point A, the seedling planting clutch is "OFF" at point B, and HA point. The hydraulic pressure switching valves 22a and 22b are set to the neutral position with the seedling planting clutch "disengaged", and the wheels 9a and 9b are moved downward at the two points with the seedling planting clutch "disengaged".

In the figure, 69 is a main clutch lever and 70 is a bonnet. Explaining the operation of the above example, after putting the machine in the paddy field, the seedlings are placed and stored in the seedling tank 39 and the main clutch is operated to "ON", and the clutch is operated also as a hydraulic operation lever. The lever 57 is operated to a part of the guide hole 50a of the operation panel 50.

Then, the left and right hydraulic pumps 21a and 21b
Is transmitted and rotated, the transmission mechanism in the mission case 2 is transmitted, and further, each rotating portion of the rice transplanter of the working machine 34 is transmitted. That is, each ground float 24a, 24b
・ While the wheels 9a and 9b are rotated with 32.33.33 grounded on the soil surface of the paddy field to propel the vehicle body, the seedling planting devices 36.36 ... The seedlings are divided and planted one after another on the soil surface grounded by each ground float 32, 33, 33.

During such a seedling planting operation, the traveling vehicle body is automatically controlled up and down as follows. That is, when the cultivator is deep, since the wheels 9a and 9b are used as the reference for the cultivator, each grounding float is pushed up on the surface soil surface of the paddy field. At this time, the left and right ground floats 24a, 24b rotate upward about the base side pivot points of the pipes 25a, 25b.

Therefore, the left and right hydraulic pressure switching levers 23a and 23b are rotated in the direction of arrow E through the rods 29 and 29, and the hydraulic pressure switching valves 22a and 22b are projected in the directions in which the respective pistons of the hydraulic cylinder devices 14a and 14b are projected. Is switched to. Therefore, the left and right wheels 9a and 9b gradually move down to raise the traveling vehicle body, and the ground contact floats are operated downward in reverse. Then, when the ground pressure reaches a proper pressure in the work for planting seedlings, the hydraulic pressure switching valves 22a and 22b are switched to the neutral state, and the projecting operation of the piston is stopped.

On the other hand, when the cultivator is shallow, the traveling vehicle body floats above the surface soil of the paddy field.
24b moves down. Therefore, the hydraulic pressure switching valves 22a, 22b are switched via the rods 29, 29 in the direction in which the hydraulic pistons are pulled in, and the left and right wheels 9a, 9b move up due to the vehicle body load, and the vehicle body descends. When the proper ground pressure is reached, the hydraulic pressure switching valves 22a and 22b are switched to neutral.

Therefore, the wheels 9a and 9 on the left and right have the depth of the cultivator.
At the b position, it is almost never changed up and down by a certain amount at the same time, and in most paddy fields, the left and right tillers are also uneven and change. In such a case, normally, the vehicle body 1 leans to the left and right and is propelled, but in the embodiment of the present invention, the base side of each hydraulic cylinder device 14a, 14b is attached to the tip side of the connecting body 10. The wheels 9
Since the a and 9b are configured to be vertically up and down operated, the contact pressures of the left and right wheels 9a and 9b are always substantially the same. However, when the cultivator has a large difference between the left and right sides, the vehicle body 1 cannot be held horizontally horizontally only by the balance operation. That is, when the left and right depths of the cultivator are not so large, the linking body 10 can sufficiently adapt to keep the vehicle body 1 horizontal, but cannot adapt to a large step.

Due to this large difference in the plowing depth, the car body 1
When one leans to the left or right, one ground float 24
a or 24b rotates upward, and the ground contact float 24b or 24a on the opposite side moves downward. Therefore, the hydraulic pressure switching valves 22a and 22b are switched in the opposite directions, and the left and right wheels 9a and 9b move up and down conversely according to the theory of operation in the case described above, and the vehicle body 1 is controlled to the horizontal state.

Therefore, in the case where the balance of the small tiller changes laterally or the seedling tank 39 moves leftward or rightward, the balance 10 is adequately maintained to keep the vehicle body 1 horizontal. However, the left and right hydraulic cylinder devices 14a and 14b work only when a large change occurs in the plowing machine, so that the vehicle body 1 can be quickly controlled to the left and right horizontal state. Therefore, the hydraulic cylinder devices 14a and 14b do not operate frequently and are propelled extremely smoothly. Further, it is not necessary to increase the swing amount of the balance, and restoration can be performed faster and smoother traveling can be performed as compared with a conventional balance having only a balance.

When the topsoil in the paddy field is hard or soft, and the sensitivity to be controlled is to be changed,
The sensitivity adjusting lever 49 may be operated to change and adjust the tension of the springs 56a and 56b. Further, when the left and right wheels 9a and 9b are both moved downward when crossing the ridge, the clutch operating lever 57 is moved to the guide hole 50a of the guide panel 50.
The left and right pins 66a and 66b push the operating plate 68 at once by the biasing force of the spring 67a, and the hydraulic pressure switching lever 23a is resisted against the springs 30 and 56a and 56b. 23b is rotated in the direction of arrow E, and the hydraulic pressure switching valves 22a and 22b are connected to the front grounding float 24a.
The state in which 24b is moved up is changed to the same state, and the pistons of the hydraulic cylinders 14a and 14b are projected at the same time to lower the wheels 9a and 9b, so that the vehicle body 1 can be raised up. In this state, you should cross the ridge.

In particular, the prime mover 5 is mounted on the prime mover mounting table 3 whose upper surface is inclined so that the front thereof is lower than the frame 4.
Since the position of the prime mover 5 can be lowered by mounting the motor, the left and right end sides of the connecting body 10 for connecting the left and right wheels 9a and 9b are projected from the holes 13 provided on the left and right side surfaces of the prime mover mounting base 3. As a result, the internal space of the prime mover mounting table 3 can be effectively used, the position of the connecting body 10 can be arranged at a lower position of the machine body, and the hydraulic cylinder devices 14a and 14b for correcting the inclination of the machine body are provided in the prime mover mounting table 3. Combined with the relatively low position on the side, the center of gravity of the aircraft can be lowered as a whole, so it is possible to perform good rice transplanting work with good traveling stability while accurately controlling the inclination of the aircraft. You can do it.

In the embodiment example, the clutch operating lever 5
In FIG. 7, the hydraulic operating lever is also used to switch the hydraulic switching valves 22a and 22b. However, it is not always necessary to use the dual operating type, and it goes without saying that each operating lever may be provided separately. In addition, a fixing device that can appropriately fix the connecting body 10 may be provided, and in this case, it is useful when traveling on the road.

[Brief description of drawings]

[Fig. 1] Overall side view of a walk-behind rice transplanter

[Fig. 2] Overall plan view of the walk-behind rice transplanter with some parts omitted

FIG. 3 is a perspective view illustrating the operation of the connecting body.

FIG. 4 is a side view for explaining the operation of the hydraulic device.

FIG. 5 is a plan view showing the operation of the hydraulic device.

FIG. 6 is a perspective view showing the operation of the seedling planting clutch.

FIG. 7 is a rear view illustrating the operation of the clutch operating lever.

[Fig. 8] Hydraulic circuit diagram

[Explanation of symbols]

 1 traveling vehicle 2 mission case 3 prime mover mount 4 frame 5 prime mover 8a / 8b transmission case 9a / 9b wheel 10 connecting body 14a / 14b hydraulic cylinder device 16a / 16b arm 22a / 22b hydraulic switching valve 24a / 24b sensor

Front page continuation (72) Inventor Takeyuki Ouchi, No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefectural Engineering Department, Iseki Agricultural Machinery Co., Ltd. In-house Examiner Keinobu Nakamura (56) Bibliography Sho 55-176712 (JP, U) Rikai 57-9216 (JP, U) Rikai 56-162921 (JP, U) Sho 55-55533 (JP, Y2)

Claims (1)

[Claims] 1. A prime mover is mounted on a prime mover mount mounted on a front part of a mission case, and a planted transmission case is provided on a rear part of a frame connected to a rear part of the mission case. Base parts are provided on both left and right sides of the mission case. A hydraulic cylinder that attaches wheels to the rear of the left and right transmission case that is pivotally attached and can move the rear part up and down, and moves the wheels up and down by the body tilt detection of the sensor that detects the tilt of the machine in the left-right direction to correct the tilt of the machine in walk-planting machine provided with apparatus, the front upper surface of the motor mounting table with respect to the frame is provided inclined to be lower, left from holes provided in right and left side surfaces of the prime mover table
Provided to the left and right end side of the interlocking member for interlocking the right wheel protrudes, between the left and right arm the left and right end side to the respective right and left base in mounted distal end side of the transmission case of the interlocking member protrudes upward position A walk-behind rice transplanter, characterized in that the left and right wheels of the prime mover mounting table are connected to each other so that the left and right wheels can move up and down, and the hydraulic cylinder device is interposed in the connecting portion.