JP2002209414A - Riding type transplanting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the troubles that the surface soil of the crop field is disturbed as the mud in the crop field is nipped and picked up with adjacent rear wheels arranged in narrow intervals and the butts are severely damaged, when the machine body is turned around in a riding type transplanting machine that has four rear wheels and is equipped with the transplant worker so that it may be vertically movable. SOLUTION: In this riding type transplanting machine, the rear wheels 7a, 7b, 7c and 7d are mounted to the top edges of a plurality of transmission cases 3b so that the four rear wheels 7a, 7b, 7c and 7d may be arranged in parallel in the right and left direction. Further, the seedling-planting device is arranged so that the seedling-planting positions s, s of two rows of the seedlings may be set between the two lines extended in the longitudinal direction of the machine body in individual four rear wheels 7a, 7b, 7c and 7d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type seedling transplanter capable of improving running performance and performing good seedling planting work.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 33815, there is a riding type rice transplanter having four rear wheels in order to reduce the weight burden ratio per wheel.

[0003]

However, in the prior art described above, since the distance between the four rear wheels is provided only for one row of seedlings, the distance between the four rear wheels is narrow, and the rear wheels are lifted by sandwiching mud with the adjacent rear wheels. It often happens that seedlings cannot be planted properly due to disturbance in the field scene. In particular, when the aircraft is turning, since the distance between the wheels is narrow, a large amount of mud is lifted by each adjacent wheel, and the headland is severely damaged.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a front wheel 6 and rear wheels 7a and 7b.
A riding type in which a seedling planting device 35 in which a plurality of seedling planting devices 35 for planting seedlings in a field are arranged side by side in the lateral direction of the machine body on a riding type traveling body 1 having 7c and 7d so as to be vertically movable. In the seedling-planting machine, rear wheels 7a, 7b, 7c and 7d are movably mounted on the front end portions of a plurality of transmission cases 3b on the riding-type traveling vehicle body 1, and four rear wheels 7a and 7 are provided in the lateral direction of the body.
b, 7c, 7d are juxtaposed, and the seedling working device 23 has two seedling planting positions i, i between the four rear wheels 7a, 7b, 7c, 7d in the longitudinal direction of the fuselage. This is a riding type seedling planting machine provided with a seedling planting device 35 so as to be set.

[0005]

According to the present invention, the riding type vehicle body 1 has rear wheels 7a, 7b, 7c.
7d is mounted so as to be freely drivable, and four rear wheels 7a, 7b, 7c, 7d are arranged side by side in the lateral direction of the body, and the seedling planting device 23 has four rear wheels 7a, 7b, 7c, 7d. Since it is a riding type seedling plant equipped with a seedling planting device 35 such that two seedling planting positions A and B are set between extension lines in the longitudinal direction of the machine, it is composed of a plurality of transmission cases 3b. Four rear wheels 7a, 7b, 7c in the left-right direction of the aircraft with a simple configuration
7d can be mounted freely, and it is a riding type seedling plant that is large and heavy compared to a walking type seedling plant, but has four rear wheels 7a and 7b juxtaposed in the left-right direction of the body.・ 7
With c · 7d, the support force of the aircraft in the left-right direction is stabilized, and excellent running performance can be exhibited. Of course, each of the four rear wheels 7a and 7b
・ 7c ・ 7d are two-row seedling planting positions.
Since the rear wheels 7a, 7b, 7c, and 7d are hardly lifted across the mud because the rear wheels 7a, 7b, 7c, and 7d are provided so wide that the b is set, a plurality of the seedling planting devices 23 are arranged side by side in the lateral direction of the machine. The posture of the seedlings planted in the field is less disturbed, the posture is stable, and the planting operation can be performed properly. Further, the headland is less likely to be damaged during the turning of the airframe, and a good seedling transplanting operation can be performed.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a seedling planting machine according to an embodiment of the present invention. Reference numeral 1 denotes a riding-type traveling vehicle body, which is configured by connecting a transmission case 2 disposed at a front portion and a rear wheel transmission case 3 disposed at a rear portion of the vehicle with a frame 4. Left and right front axle cases 5.5 are fixed to the left and right sides of the rear of the transmission case 2,
Left and right steering drive front wheels 6.6 are provided below the left and right front axle cases 5.5.

The rear wheel transmission case 3 includes a lateral case 3a disposed in the lateral direction of the machine body, and a transmission case 3 having bases fixed to both left and right sides of the lateral case 3a and extending obliquely downward and rearward.
b and 3b form a U-shape in plan view. 7a ・ 7
b, 7c and 7d are driving rear wheels having the same diameter, and left driving rear wheels 7a and 7b are mounted on left and right sides of the left transmission case 3b.
The right driving rear wheels 7c and 7d are mounted on left and right sides of the right transmission case 3b.

Reference numeral 8 denotes an engine, and a rear wheel transmission case 3
Power is transmitted from the engine 8 to the transmission case 2 at the front of the fuselage. The transmission case 2 transmits the power to the left and right front axle cases 5 via the front wheel differential mechanism.
Power is transmitted to the left and right steering drive front wheels 6 and 6 by the transmission shaft in 5, and further to the rear wheel differential mechanism 10 in the lateral case 3a of the rear wheel transmission case 3 via the transmission shaft 9 in the frame 4. The power is transmitted, and the rear wheel differential mechanism 10 transmits the left and right rear wheel drive shafts 11.
11 and the transmission chain 12 in the transmission case 3b.
Power is transmitted to the left and right rear wheel differential mechanisms 13 via the reference numeral 12. Then, power is transmitted from the left and right rear wheel differential mechanisms 13 to the axles 14, 14, respectively, and the rear wheels 7a, 7b,
7c and 7d are configured to be driven.

Reference numeral 10a denotes a differential lock device of the rear wheel differential mechanism 10, which is a non-operating state for differentially rotating the left and right rear wheel drive shafts 11 and a differential lock operation for integrally rotating the left and right rear wheel drive shafts 11. It is configured to be able to switch to the state. 13a and 13b are left and right rear wheel differential mechanisms 13 respectively.
· 13 differential lock devices, each comprising axles 14 · 14
Is switched between a non-operating state in which the axles 14 are integrally rotated and a differential lock operating state in which the axles 14 are integrally rotated.

The differential lock device 10a and the differential lock devices 13a and 13b are set to the differential lock state when the operation lever 29 is operated to the "ON" position so that the differential lock state is established during the seedling planting operation. To the operation lever 29. (Otherwise, when the steering handle 19 is operated to rotate the body more than a predetermined value, when the left and right brake pedals are braked, the seedling planting device 23
The differential lock device 10a is used when the
The differential lock devices 13a and 13b may be linked so as to be inactive. )

Reference numerals 15 and 15 denote left and right side brakes provided on the left and right rear wheel drive shafts 11 in the lateral case 3a of the rear wheel transmission case 3, respectively, and a front portion of a step 16 provided in front of the engine 8. The left and right side brakes are applied by depressing each of the left and right brake pedals provided on the vehicle. That is, the driving of the driving rear wheels 7a and 7b or 7c and 7d on the side where the left and right brake pedals are depressed is stopped, and the brakes are applied.

The transmission case 2 contains a main transmission mechanism in which the rotational driving force of the engine 8 is shifted by a main transmission lever 17, which will be described later, and a front wheel differential mechanism. 1
Reference numeral 8 denotes a body cover formed by FRP. An engine cover portion that covers the periphery of the engine 8 and a step 16 provided on the front and left and right sides of the engine 8 are integrally formed and fixed on the body. ing. And step 1
Numeral 6 extends from both left and right sides of the steering handle 19 to the front and forms left and right passages A.

A control seat 20 is a body cover 18.
It is mounted on the top. Reference numeral 21 denotes a link mechanism including an upper link and a lower link, the base end of which is pivotally connected to a support frame 22 extending above the rear wheel transmission case 3, and the rear end of which is a seedling. The planting device 23 is pivotally mounted on a vertical frame 25 provided with a rolling shaft 24 that supports the planting device 23 in a freely rolling manner.

Reference numeral 26 denotes a hydraulic cylinder device. The base of the cylinder is pivotally connected to the rear wheel transmission case 3, and the tip of the piston is pivotally connected to the upper link. Reference numeral 27 denotes a front cover made of a synthetic resin that covers the periphery of the handle post, and is fixed to the front upper surface of the step 16;
The upper surface is an operation panel provided with various display devices and meters. The main transmission lever 17 is provided on the left side of the front cover 27, and the belt-type continuously variable transmission provided on the transmission system between the engine 8 and the transmission case 2 is provided on the right side of the front cover 27. Operation of the auxiliary transmission lever 28 and the planting clutch for operating the mechanism and the seedling planting device 2
3, and an operation lever 29 for performing the up / down operation of 3 are provided.

Reference numeral 30 denotes a main clutch pedal provided on the left side of the front cover 27. The seedling planting work device 23 includes a planting transmission case 31 also serving as a frame that is rotatably mounted on the rolling shaft 24 of the vertical frame 25, a lower supporting member 32 and an upper supporting member provided in the planting transmission case 31. A seedling support 34 supported by 33 and reciprocating in the lateral direction of the machine body; and a seedling mounted on the rear end of the planting transmission case 31 and divided by one plant from the lower end of the seedling mounting 34 into a field. Seedling planting device 35 for planting and planting transmission case 3
The lower part of 1 is composed of four leveling floats 37a, 37b, 37c, 37d, etc., which are a leveling body whose rear part is pivotally supported by a shaft 36 and whose front part is vertically swingably mounted.

Each leveling float 37a, 37b, 37c
37d are arranged behind the driving rear wheels 7a, 7b, 7c, 7d, respectively, and the driving rear wheels 7a, 7b, 7c, 7d
And the seedling planting equipment 3
5 is provided to level the front of the field where the seedlings are planted. Numeral 38 is a hydraulic valve provided between the upper surface of the front part of the inner leveling floats 37b and 37c and the planting transmission case 31, and both of the front parts of the leveling floats 37b and 37c are lifted to above an appropriate range by external force. When it is pressed, a hydraulic pump mounted on the left side surface of the transmission case 2 sends pressure oil pumped from the inside of the transmission case 2 to the hydraulic cylinder 26 to protrude the piston, thereby causing the link mechanism 2
1 to raise the seedling planting device 23 to a predetermined position, and when both fronts of the leveling floats 37b and 37c have fallen beyond an appropriate range, pressurized oil in the hydraulic cylinder 26 into the transmission case 2. Then, the link mechanism 21 is moved down to lower the seedling operating device 23 to a predetermined position, and when at least one of the fronts of the leveling floats 37b and 37c is within an appropriate range (the seedling operating device 23).
(When is at an appropriate predetermined position), it is provided to stop the entry and exit of the pressure oil in the hydraulic cylinder 26 and to hold the seedling operating device 23 at a fixed position.

An operating lever 29 protruding from the right side of the front cover 27 and provided on the lower right side of the steering handle 19 is
The PTO clutch provided in the transmission case 2 is operated to turn on and off the power to the seedling working device 23, and the hydraulic valve 38 is operated to manually operate the seedling working device 23. Is configured to be able to move up and down. That is, when the operation lever 29 is set to the “fixed” position, the PTO clutch is disconnected, the operation of the seedling planting device 23 is stopped, and the hydraulic valve 38 stops the flow of the hydraulic oil in the hydraulic cylinder 26, and the seedling planting device 23 is moved. The position is switched to the position for holding the seedling at a fixed position, and the seedling operating device 23 does not rise or fall. Then, when the operation lever 29 is operated backward to the “down” position, the PTO clutch is disengaged and the operation of the seedling operating device 23 is stopped, but the hydraulic valve 38 is stopped.
Becomes an automatic control state which is switched by the vertical movement of the leveling floats 37b and 37c. And, furthermore, the operation lever 29
Is set to the "on" position, the PTO clutch is engaged, the seedling planting device 23 is driven, and the hydraulic valve 38 is in an automatic control state in which the hydraulic valves 38 are switched by up and down movements of the leveling floats 37b and 37c. On the contrary, the operation lever 29 is operated forward to “up”
When it is in the position, the PTO clutch is disconnected and
Is stopped, and the hydraulic valve 38 is forcibly switched to the side in which the seedling operating device 23 is moved upward, so that the seedling operating device 23 is stopped.
Is raised.

Reference numeral 39 denotes each leveling float 37a, 37b, 3
A leveling rake provided between 7c and 37d, for leveling a field disturbed by left and right steering drive front wheels 6, 6 and leveling a field scene between respective leveling floats 37a, 37b, 37c and 37d. It is provided for. Reference numeral 40 denotes a differential lock pedal of a front wheel differential mechanism in the transmission system of the left and right steering drive front wheels 6.

A indicates the position of each seedling planted by the eight seedling planting devices 35, and the seedling planting devices 35 are arranged so as to plant two seedlings between the rear wheels 7a, 7b, 7c, 7d. Is provided. The riding type rice transplanter configured as described above is put into a paddy field, the seedlings are placed on the seedling mounting table 34, the engine 8 is started, the main transmission lever 17 is set to the "planting speed" position, and the sub transmission lever 28 is set. Is set to the "high" or "low" position, and the operation lever 29 is set to the "on" position to drive the respective parts to advance the machine body, the seedling planting device 23 is automatically controlled up and down to an appropriate position, and the rice planting operation is started. Done. At this time, since the operation lever 29 is in the “in” position during the seedling planting operation, the differential lock device 10a and the differential lock devices 13a and 13b are in the differential lock operation state, and the rear wheel differential mechanism 10 and the left and right rear wheels The differential mechanisms 13 do not rotate differentially, and the rear wheels 7a
Since all of 7b, 7c, and 7d rotate in the same way, the airframe has good straightness, and the seedlings can be planted straight. Also,
Since the four rear wheels 7a, 7b, 7c, 7d are provided at such a wide interval that two seedlings can be planted, the body support performance is good, and the rear wheels 7a, 7b,
There is little danger that the mud is lifted between the 7c and 7d, and extremely good running performance is exhibited, and proper rice transplanting work can be performed.

When turning the aircraft around the ridge,
When the operating lever 29 is set to the "up" position, the PTO clutch is disengaged, the operation of the seedling operating device 23 is stopped, and the hydraulic valve 38 is forcibly switched to the side in which the seedling operating device 23 is raised, so that the seedling operating device is moved upward. 23 is raised and the differential lock device 1
0a and the differential lock devices 13a and 13b are in an inactive state, and the rear wheel differential mechanism 10 and the left and right rear wheel differential mechanisms 13 and 13
Will rotate differentially. Therefore, when the operator operates the steering handle 19 to turn the aircraft, the rear wheels 7a and 7
b, 7c, and 7d rotate properly and can make small turns without disturbing the mud surface of the field, and do not hurt the headland so much that the headland planting operation can be performed well. If the operator operates the steering handle 19 and depresses the brake pedal on the turning side at the same time, further turning can be performed.
(For example, in the case of turning right, if the right side brake 15 is applied by depressing the right brake pedal, the right rear wheel drive shaft 11
Is stopped and fixed, the right rear wheel differential mechanism 13 causes the two right rear wheels 7c and 7d to reverse each other as the vehicle turns, and the aircraft can make a single point turn. )

If the worker is a skilled worker, setting the sub-shift lever 28 to the "high" position will increase the work speed, thereby improving work efficiency. On the other hand, when traveling on the road, the operation lever 2
9 is operated to the "fixed" position, the differential lock device 10a and the differential lock devices 13a and 13b are in a non-operating state, and the rear wheel differential mechanism 10 and the left and right rear wheel differential mechanisms 13.
13 performs differential rotation. Therefore, the rear wheels 7a, 7b, 7c
7d performs a differential rotation, so that it is possible to perform good road running.

The riding type rice transplanter has a rear wheel differential mechanism 1
0, two rear wheels 7a on the left side via the left and right rear wheel drive shafts 11.
7b and the two right rear wheels 7c and 7d are driven, and the left side brake 15 that brakes the two left rear wheels 7a and 7b together and the right side brake that brakes the two right rear wheels 7c and 7d together 15 and four rear wheels 7
While having a, 7b, 7c, 7d, it is possible to exhibit excellent turning performance with a small turning radius with a simple configuration.

The four rear wheels 7a, 7b, 7c, 7
Leveling floats 37b between extension lines in the longitudinal direction of d
・ 37c ・ 37d are arranged and each leveling float 37b
・ Each rear wheel 7a ・ 7b ・ 7 leveled by 37c ・ 37d
Since the seedling planting device 35 is provided so that the two seedling planting positions A and B are set between the extension lines in the longitudinal direction of the aircraft c and 7d, the four rear wheels 7a, 7b, 7c, and 7d are provided. And the leveling floats 37b, 37c and 37d as close as possible in the longitudinal direction of the fuselage, the four rear wheels 7a, 7b, 7c and 7d
However, there is little adverse effect on the leveling floats 37b, 37c, and 37d, and a good seedling transplanting operation can be performed even if the overall length of the machine is shortened.

Further, the riding type traveling body 1 has a lateral case 3a.
And a rear wheel transmission case 3 composed of a plurality of transmission cases 3b extending from the lateral case 3a, and the rear wheels 7a, 7b, 7c, 7d are drivably mounted on the distal end of each transmission case 3b. And the rear wheels 7a, 7b, 7c
7d are arranged side by side, so that the horizontal case 3a and the horizontal case 3a
And three or more rear wheels 7 in the left-right direction of the fuselage with a simple but strong configuration comprising a plurality of transmission cases 3b extending from
a, 7b, 7c, 7d can be freely mounted, and despite being a large and heavy riding type seedling transplanter, the supporting force in the left-right direction of the aircraft can be stabilized and excellent running performance can be exhibited.

Next, a second embodiment will be described with reference to FIG. In the second embodiment, the transmission cases 3b of the rear wheel transmission case 3 are formed of a chain case, and the wheel diameters are changed instead of the right and left rear wheel differential mechanisms 13 except for the left and right rear wheel differential mechanisms 13. That is, the diameters of the rear wheels 7a and 7d on the outer side of the fuselage are smaller than the diameters of the rear wheels 7b and 7c on the inner side of the fuselage.

Then, a hydraulic valve 38 is provided between the planting transmission case 31 and the front upper surfaces of the leveling floats 37a and 37d located behind the small-diameter rear wheels 7a and 7d, and the front of the leveling floats 37a and 37d. When both parts are lifted beyond an appropriate range by external force, hydraulic oil pumped from inside the transmission case 2 is sent to the hydraulic cylinder 26 by a hydraulic pump mounted on the left side surface of the transmission case 2 to make the piston protrude. By moving the link mechanism 21 upward, the seedling planting device 23 is raised to a predetermined position, and when both of the fronts of the leveling floats 37a and 37d have fallen beyond an appropriate range, the hydraulic oil in the hydraulic cylinder 26 is transferred to the transmission case 2. To lower the seedling operating device 23 to a predetermined position by moving the link mechanism 21 downward, and then the leveling floats 37a and 37d When any of the front is in the proper range even without (when NaeUe working device 23 is in a suitable place)
Is provided to stop the inflow and outflow of the pressurized oil in the hydraulic cylinder 26 and to hold the seedling planting device 23 at a fixed position.

The front left and right steering drive wheels 6 are positioned in front of the leveling floats 37b and 37c on the inner side of the fuselage, and the left and right steering drive front wheels 6 are positioned by the leveling floats 37b and 37c.
・ Rake 3 for leveling by configuring to level the wheel tracks of 6
9 ... is excluded. According to the second embodiment, the hydraulic valve 38 is provided between the front upper surfaces of the leveling floats 37a and 37d located behind the rear wheels 7a and 7d which are small in diameter and do not hurt the mud surface much and the planting transmission case 31. Seedling planting equipment 2
3 is configured to be controlled to move up and down, so that the control can be performed properly and a good rice planting operation can be performed.

Next, a third embodiment will be described with reference to FIG. In the third embodiment, similarly to the second embodiment, the transmission cases 3b, 3b of the rear wheel transmission case 3 are formed by a chain case, and the wheels are replaced instead of the left and right rear wheel differential mechanisms 13, 13. The diameter is different. That is, the rear wheels 7 inside the fuselage
The diameters of b and 7c are smaller than the diameters of the rear wheels 7a and 7d outside the fuselage.

A hydraulic valve 38 is provided between the planting transmission case 31 and the front upper surfaces of the leveling floats 37b and 37c located behind the small-diameter rear wheels 7b and 7c. The planting operation device 23 is configured to be vertically controlled by the vertical movement of the section. Also, inside the large-diameter outer rear wheels 7a and 7d and the small-diameter inner rear wheels 7b and 7d.
A ground leveling rake 39 'is provided on the rear side of the rear surface 7c, and the left and right steering drive front wheels 6.6 and the rear wheel wheels of the inner rear wheels 7b and 7c are configured to be leveled by the ground leveling rake 39'. I have.

Next, a fourth embodiment will be described with reference to FIG. In the fourth embodiment, the present invention is applied to a ten-row planting type rice transplanter.
In the same manner as in the second embodiment, the diameter of the rear wheels 7a and 7d on the outer side of the fuselage is made smaller than the diameter of the rear wheels 7b and 7c on the inner side of the fuselage. 5 leveling floats 37a, 37b, 37c, 37d, 37
e is provided.

A ground leveling rake 39 is arranged behind each of the rear wheels 7a, 7b, 7c, 7d. Further, the front upper surface of the center leveling float 37c and the planting transmission case 3
1 and a hydraulic valve 38 is provided between the
The planting operation device 23 is configured to be controlled up and down by the vertical movement of the front part c. Furthermore, the outermost leveling float 37
A hydraulic valve for rolling control is provided between the front upper surface of the a.37e and the planting transmission case 31, and a rolling operation hydraulic cylinder is provided between the vertical frame 25 of the link mechanism 21 and the planting transmission case 31. In addition, the rolling control is performed by detecting the inclination of the seedling operating device 23 with respect to the ground based on the vertical displacement of the outermost leveling floats 37a and 37e.

In the above embodiment, the present invention is applied to a riding type rice transplanter in which a seedling planting device is mounted at the rear of the riding type traveling vehicle body. May be implemented.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a plan view of a main part of a riding rice transplanter.

FIG. 3 is a main part plan view showing a second embodiment.

FIG. 4 is a main part plan view showing a third embodiment.

FIG. 5 is a main part plan view showing a fourth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Riding type vehicle body 2 Transmission case 3 Rear wheel transmission case 3a Side case 3b Transmission case 4 Frame 5 Front axle case 6 Steering drive front wheel 7a-7d Drive rear wheel 8 Engine 10 Rear wheel differential mechanism 11 Left and right rear wheel drive shaft 15 Left and right side brakes 23 Seedling planting device 35 Seedling planting device

Claims (1)

[Claims] 1. A seedling planting operation in which a plurality of seedling planting devices 35 for planting seedlings in a field are mounted on a riding type traveling vehicle body 1 having front wheels 6 and rear wheels 7a, 7b, 7c, 7d in a lateral direction of a machine body. In the riding type seedling transplanter equipped with the device 23 so as to be able to move up and down, rear wheels 7a, 7b, 7c and 7d are mounted on the riding type traveling body 1 at the front ends of a plurality of transmission cases 3b so as to be freely driven. Four rear wheels 7a, 7b, 7c, 7d in the left-right direction of the aircraft
And the seedling operation device 23 is provided between the four rear wheels 7a, 7b, 7c, 7d between the extension lines in the longitudinal direction of the fuselage.
A riding-type seedling planting machine, wherein a seedling planting device 35 is provided so that the seedling planting positions A and B of the streak are set.