JPH0723633A - Planting section of passenger rice transplanter - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure the rolling regulation of the planting part by using a compact rolling cylinder auxiliary spring with a small spring constant. [Structure] Passenger with a planting part connected to the rear of the running part so that it can be raised and lowered via an elevating link mechanism and can be freely rolled around the axis line in the front-rear direction, and the planting part can be controlled by rolling control means In the rice transplanter, the rolling cylinder of the rolling control means is attached to the link side hitch provided at the rear end of the lifting link mechanism with the rolling cylinder positioned as high as possible above the rolling fulcrum of the planting section. While extending the piston rod in the left-right width direction, a rolling connecting frame is laid horizontally on the front side of the seedling mounting table provided in the planting part, and both ends of the piston rod are interlockingly connected to the connecting frame. Between the left and right side parts of the connecting frame and the link side hitch part located above the rolling cylinder, a pair of left and right rolling cylinder auxiliary A spring was installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting section of a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as a form of riding rice transplanter, a planting section can be raised and lowered freely through a lifting link mechanism behind a traveling section.
And, it can be freely rolled around the longitudinal axis.
There is one in which the planting part can be controlled by rolling by means of rolling control means.

A rolling regulating spring extending straight in the left-right width direction is arranged at a position just above a rolling support shaft that pivotally supports the rear end portion of the elevating link mechanism and the planting portion. The center of the rolling restriction spring is attached to the rear end of the lifting link mechanism, and the left and right ends of the rolling restriction spring are connected to the seedling table provided in the planting section.

In this way, the rolling restricting spring can return the rolling-applied part to the neutral position with respect to the running part.

[0005]

However, in the above-mentioned riding rice transplanter, since the rolling restriction spring is arranged in the vicinity of the rolling support shaft, unless the spring constant is secured large, the planting The spring itself was enlarged because of its failure to return to its neutral position.

[0006]

In view of the above, according to the present invention, a planting portion is connected to a rear portion of a traveling portion via a lifting link mechanism so that the planting portion can be raised and lowered and can be rolled around an axis line in the front-rear direction. In the riding rice transplanter in which rolling control is possible by the rolling control means, the rolling cylinder of the rolling control means can be installed in the link side hitch provided at the rear end of the lifting link mechanism as much as possible from the rolling fulcrum of the planting section. Install it by positioning it upwards, and extend the piston rod of the rolling cylinder in the left-right width direction, while horizontally rolling the connecting frame for rolling on the front side of the seedling table provided in the planting part, By interlockingly connecting both ends of the piston rod, between the left and right side portions of the same connecting frame and the link side hitch portion located above the rolling cylinder, There is provided cents planting portion of the riding rice transplanter, characterized in that interposed the respectively left and right pair of rolling cylinders auxiliary spring.

[0007]

[Operation] When planting seedlings, the running section is run to pull the planting section while the seedling is planted by the planting section. Rolling control is performed by the rolling control means, that is, the planting unit controls the posture so as to maintain horizontal control with respect to the field scene even when the traveling unit has an inclined posture due to the unevenness of the cultivator, so that the planting depth of the seedlings is controlled. I try to keep it together.

At this time, the rolling cylinder of the rolling control means is attached to the link side hitch portion provided at the rear end portion of the elevating link mechanism while being positioned as high as possible above the rolling fulcrum of the planting portion. While extending the piston rod of the rolling cylinder in the left-right width direction, a rolling connecting frame is laid horizontally on the front side of the seedling table provided in the planting part, and both ends of the piston rod are interlockingly connected to the connecting frame. Further, since a pair of left and right rolling cylinder auxiliary springs are respectively provided between the left and right side portions of the connecting frame and the link side hitch portion located above the rolling cylinder, Both rolling cylinder auxiliary springs reduce the load load acting on the rolling cylinders, and when the rolling cylinders fail or the rolling control In the dead zone where the posture change detection unit can not detect the position change operation of the traveling part of the unit, if the rolling cylinder is not operated, it is possible to automatically return to the neutral position planting portion with respect to the traveling unit.

Moreover, since both rolling restraining springs are arranged as high as possible from the rolling fulcrum position, the moment acting as the rolling restraint is increased and the spring constant is set as small as possible. can do.

Further, when the rolling constants of the pair of left and right rolling cylinder auxiliary springs are different from each other so as to cancel the rolling force by the input shaft of the planting part, the planting part is surely horizontal. Can hold posture.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral A shown in FIG. 1 denotes a passenger rice transplanter. The passenger rice transplanter A has a planting section 20 connected to a rear of a traveling section 1 capable of self-propelling so as to be vertically movable by an elevator link mechanism 50.

As shown in FIG. 1, the traveling unit 1 has an engine 3 mounted on a front portion of a vehicle body frame 2 and a mission case 4 arranged on a rear portion of the vehicle body frame 2 at a front position of the mission case 4. The left and right front wheels 6, 6 for traveling paddy fields are mounted via the front axle case 5, and the left and right rear wheels 8, 8 for traveling paddy fields are mounted at the rear of the mission case 4 via the rear axle case 7. .

Then, the spare seedling mounts 10 and 10 are attached to both sides of the bonnet 9 for covering the engine 2 and the like, and the mission case 4 and the like are covered by the vehicle body cover 12 forming the step 11, and the upper portion of the vehicle body cover 12 is covered. In the driver's seat 13
A steering handle 14 is provided at the front of the driver's seat 13 at the rear of the bonnet 9. Reference numeral 15 is a main gear shift lever, and 16 is a planted lifting / lowering shift lever.

The planting section 20 is, as shown in FIGS. 1 and 2,
The planting cases 22 and 22 are arranged on the left and right sides of the planting mission case 21 at regular intervals, and the planting mission case 21 and both planting cases 22 and 22 are connected to the transmission shaft cases 23 and 23. A rotary case 24 that rotates in one direction at a constant speed is attached to the rear ends of the cases 21, 22, and 22, respectively, and a pair of plants are symmetrically placed around the rotary shaft center of each rotary case 24. Attached claws 25, 25 are attached. 26 is a center float, 27 is a side float, 28 is a fertilizer application device, and 29 is a chemical spray device.

Then, as shown in FIGS. 1 and 2, the input shaft 30 is projected forward from the front wall of the planted mission case 21, and the mission case 4 is arranged on the input shaft 30 and the traveling section 1. A transmission shaft 31 is interposed between the transmission shaft 31 and the shaft, and power can be transmitted to the planted mission case 21 via the transmission shaft 31.

Further, as shown in FIGS. 1 and 2, on the planted mission case 21 and the left and right planted cases 22 and 22, as shown in FIGS.
Place the seedling placing table 32 in an inclined state of front high and low,
A guide rail 33 formed by extending in the left-right width direction is horizontally laid on the upper end of the front side of the, and a center portion support post 34 formed on the guide rail 33 so as to rise above the planted mission case 21.
And the upper ends of the left and right support columns 35, 35 that are formed by standing up above the left and right side planting cases 22, 22, sliding in the left-right width direction via guide rollers (not shown). On the other hand, while freely connecting, the lower end of the seedling table 32 is slidably supported in the left-right width direction on the lower rail 36 that is laid across the cases 21, 22, 22.

As shown in FIGS. 2 to 4, a rolling connecting frame 37 is horizontally provided between the upper portions of the above three columns 34, 35, 35, and the rolling connecting frame 37 is mounted on the rolling connecting frame 37. Is adapted to connect a rolling cylinder 72 of rolling control means 80, which will be described later, and springs 90, 91 for assisting the rolling cylinder.

As shown in FIGS. 1 and 3, a planting side hitch portion 40 is provided at the front end portion of the planting mission case 21. A hitch base 41 is fixedly provided at the front end, and a rolling support shaft 42 is projected from the center of the hitch support 41 toward the front, and at positions directly above and directly below the rolling support shaft 42, respectively. The upper and lower rolling restraining pins 43, 44 are formed by projecting forward.

The lifting link mechanism 50, as shown in FIG.
The front end of the top link 52 and the front ends of the pair of left and right lower links 53, 53 are vertically rotatably connected to a mounting frame 51 provided upright at the rear end of the vehicle body frame 2, while each link 52 is connected to a link side hitch portion 54. The rear end of the vehicle body frame 2 is connected to the link side hitch portion 54 while vertically connecting the rear ends of the
An elevating cylinder 55 provided at the rear part is interlocked and connected via an elevating operation link 56.

As shown in FIGS. 3 and 4, the link-side hitch portion 54 is formed by forming a front hitch-forming body 57 and a rear hitch-forming body 58 into a rectangular tubular shape extending vertically. A gate-shaped link connecting bracket 59 is attached to the upper end of the front hitch forming body 57, and the rear end portion of the top link 52 is pivotally supported and connected to the link connecting bracket 59 by a pivot pin 60. , The left and right side walls of the front hitch forming body 57 are respectively provided with link connecting bodies 61, 61 protruding in the left-right width direction, and the left and right lower links 53, 53 are attached to the link connecting bodies 61, 61.
The rear ends of the rear ends are pivotally connected by pivot pins 62, 62 to be connected. 57a is a top link insertion hole.

As shown in FIGS. 3 and 4, the rear hitch forming member 58 has an upper end 58a extended to a position above the link connecting bracket 59, and a cylinder mount 63 is attached to the upper end 58a. While being mounted, a boss portion 64 is provided at the lower end portion, and a rear hitch formation body 58 located immediately above the boss portion 64 is provided.
The upper pin receiving portion 65 is provided on the rear wall, and the lower pin receiving portion 66 is provided at the lower end portion of the rear hitch forming body 58 located immediately below the boss portion 64, and the lower pin receiving portion 66 is provided on each of the pin receiving portions 65, 66. The upper and lower rolling restraining pins 43 and 44 provided on the planting side hitch portion 40 are fitted with each other.

In this way, by connecting the planting side hitch portion 40 to the link side hitch portion 54, the planting portion 20 can be freely rolled around the boss portion 64 and the upper and lower rolling restraining pins can be provided. 43 and 44 suppress the excessive response of the rolling motion of the planting part 20 to stabilize the posture of the planting part 20.

As shown in FIGS. 3 and 4, the cylinder mount 63 is a support body which is attached by inserting the lower half portion from above into the upper end portion 58a of the rear hitch forming body 58 formed in a rectangular tubular shape. 70 and a cylinder mounting case 71 attached to the front upper half of the support body 70. The cylinder mounting case 71 is formed in a tubular shape with left and right sides open, and the case 71
While inserting the double-acting rolling cylinder 72 inside,
In the same case 71, the cylinder body 72a of the rolling cylinder 72
The center portion of the cylinder is pivotally supported by a cylinder support shaft 73 whose axial center is oriented in the front-rear direction, and the piston rods 72b are extended from the cylinder main body 72a in the left-right width direction, respectively, as shown in FIG. Connect both ends of the piston rod 72b and the left and right side portions of the rolling connecting frame 37, respectively.
It is connected via 74,74. 75 is the cylinder body 72a
The valve case is attached to the right end of, and 76 is a mounting bolt.

In this way, by sliding the piston rod 72b of the rolling cylinder 72 in the left-right width direction, the planting portion 20 can be rolled around the boss portion 64.

Here, the rolling control means 80 includes the rolling cylinder 72, an angular velocity sensor 81 provided at the rear portion of the traveling unit 1 for detecting a lateral tilt velocity (velocity or acceleration of the tilt motion), and the planted mission case 20. The horizontal sensor 82 for detecting the right and left inclination angle of the planting part provided on the above, and the control part 83 in which the above-mentioned sensors 81 and 82 are connected to the input side and the rolling cylinder 72 is connected to the output side via the valve case 75. It is equipped with.

In the rolling control means 80, the control section 83 automatically controls the rolling cylinder 72 by fuzzy inference based on the detection results of the angular velocity sensor 81 and the horizontal sensor 82, and corrects the lateral inclination of the planting section 20. Thus, the planting section 20 can be held substantially horizontally with respect to the field scene.

On the ceiling wall of the cylinder mounting case 71, as shown in FIGS. 2 to 4, a spring support body 85 is erected upward and frontward so that the spring support body 85 has a left and right width at the upper end thereof. Connecting brackets 33a attached to the left and right ends of the spring connector 86 and the left and right ends of the guide rail 33 so that the middle part of the spring connector 86 extending in the direction can be installed in the left-right width direction so that the mounting position can be adjusted. , 33a between the left and right neutral return springs.
87,87 are installed respectively. 88 is mounting bolt, 89
Is a hole for mounting position adjustment.

In the above structure, the gist of the present invention is to provide a pair of left and right rolling cylinder auxiliary springs 90, 91 between the left and right side portions of the rolling connection frame 37 and the spring support member 85. What happened is that
This will be described with reference to FIG.

That is, as shown in FIGS. 2 to 4, the pair of left and right rolling cylinder assisting springs 90, 91 connects the inner end portions 90a, 91a to the lower portions on the left and right sides of the spring support member 85, respectively. The outer rods 91b and 91b are connected to the spring connecting brackets 92 and 92 projecting upward from the connecting rods 74 and 74, respectively.
It is connected via c and 91c.

In this manner, the rolling cylinder 72 is rotated by the pair of left and right rolling cylinder auxiliary springs 90, 91.
The rolling cylinder 72 reduces the load burden that acts on the
If the rolling cylinder 72 does not operate in the dead zone region where the angular velocity sensor 81 or the horizontal sensor 82, which is the posture change detection unit of the rolling control means 80, cannot detect the posture change operation of the traveling unit, The part 20 can be automatically returned to the neutral position with respect to the traveling part 1.

Moreover, the pair of left and right rolling cylinder assisting springs 90, 91 are arranged above the rolling cylinder 72 so as to be as high as possible above the rolling spindle 42 which is the rolling center position of the planting portion 20. At the position, the moment can be utilized to perform the rolling regulation function, so that the spring constants of both rolling cylinder auxiliary springs 90 and 91 can be made as small as possible and the spring itself can be miniaturized. I have to.

Further, in this embodiment, as shown in FIG.
Since the rotation direction a of the input shaft 30 of the planted mission case 20 is clockwise, the spring constant of the rolling cylinder auxiliary spring 91 on the right side is set to the left side so that the rolling force of the input shaft 30 can be offset. It is set larger than the spring constant of the rolling control spring 90 of.

Further, in the present embodiment, as shown in FIG. 4, the cylinder support shaft 73 pivotally supporting the central portion of the rolling cylinder 72 is replaced with a virtual vertical line C passing through the center of the rolling support shaft 42.
Is offset to the right (toward the left in FIG. 4) by a certain width W, and the valve case 75 is attached to the right end of the cylinder body 72a of the rolling cylinder 72. In cooperation with 91, the rotative power of the input shaft 30 is offset.

In this way, even when the input shaft 30 is rotated in the a direction, the rolling force of the input shaft 30 can be canceled out so that the planting portion 20 can be held in a horizontal posture, and rolling can be performed. The control unit 80 can accurately perform horizontal control of the planting section 20 so that the planting work performance of the planting section 20 can be improved.

FIG. 5 shows a planting portion 20 as another embodiment. In the planting portion 20, the spring support member 85 and the left support column 35 are provided.
A damper 96 is provided as a buffer between the upper part and the upper part. 96a and 96b are damper connecting pins, respectively.

In this way, when the rolling operation of the planting section 20 becomes an excessive rotation speed, the resistance by the damper 96 brakes the rolling operation in proportion to the rotation speed, and the planting section is rotated. The 20 rolling motions can be stabilized.

Further, when the rolling operation of the planting section 20 is gentle, the planting section 20 enables accurate planting work in order to absorb the unevenness of the field scene.

FIG. 6 shows a planting portion 20 as another embodiment, in which a planting side hitch portion 40 and a transmission shaft case are provided.
A damper 96 is installed between 23 and 23 in an inclined state.

In this way, as in the case described above, the braking function and the like for the rolling operation are generated, and the damper 96 itself can be downsized.

[0041]

According to the present invention, the following effects can be obtained.

The pair of left and right rolling cylinder auxiliary springs can reduce the load burden acting on the rolling cylinder. When the rolling cylinder fails, or the posture change detecting unit of the rolling control means detects the posture changing operation of the traveling unit. Even if the rolling cylinder does not operate in the dead zone, which is not possible, the pair of left and right rolling cylinder auxiliary springs can automatically return the planting portion to the neutral position with respect to the traveling portion.

Since the rolling cylinder auxiliary spring is arranged at a position higher than the rolling fulcrum position,
The moment acting as a rolling restriction can be increased and the spring constant can be set as small as possible.
The spring itself can be downsized.

The spring constants of the pair of left and right rolling cylinder auxiliary springs are different from each other so as to cancel the rolling force by the input shaft of the planting part, so that the planting part is surely kept in the horizontal posture. The planting work performance can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter equipped with a planting section according to the present invention.

FIG. 2 is a front view of the planting part.

FIG. 3 is a side view of a main part.

FIG. 4 is a front view of the main part.

FIG. 5 is a front explanatory view of a planting portion as another embodiment.

FIG. 6 is a front explanatory view of a planting part as another embodiment.

[Explanation of symbols]

 A Riding rice transplanter 1 Traveling part 20 Planting part 30 Lifting link mechanism 90 Rolling cylinder auxiliary spring 91 Rolling cylinder auxiliary spring

Claims (1)

[Claims] 1. A planting part is connected to a rear part of a running part via a lifting link mechanism so that the planting part can be raised and lowered and can be rolled around an axis line in the front-rear direction, and the planting part can be controlled by a rolling control means. In the riding rice transplanter, on the link side hitch part provided at the rear end of the lifting link mechanism,
Mount the rolling cylinder of the rolling control means by positioning it as high as possible above the rolling fulcrum of the planting part,
While extending the piston rod of the rolling cylinder in the left-right width direction, the rolling connecting frame is laid horizontally on the front side of the seedling table provided in the planting part, and both ends of the piston rod are interlocked with the connecting frame. A pair of left and right rolling cylinder auxiliary springs are provided between the left and right side portions of the connecting frame and the link-side hitch portion located above the rolling cylinder. Planting department of rice transplanter.