JPS6041061Y2 - rice transplanter - Google Patents

Description

[Detailed description of the invention] This invention is designed to maintain the working posture of the device almost constant during planting, regardless of the left and right tilting of the machine. The above-mentioned rice transplanter is a rice transplanter in which the rice transplanter is suspended from the main machine so as to be able to roll freely so that the planting depth can be stabilized.

In this type of conventional rice transplanter, the rolling center of the rice transplanter and the planting machine is at the center or almost the center of the width of the machine, and is located above the float to allow for relative left and right rocking between the machine and the device. Because the plant was installed at a location quite far away from the float, the planting device tends to slide significantly in the left and right directions during rolling. In order to prevent the transmission shaft installed in the device from being covered with mud, the transmission shaft was installed above the rolling center, so planting using this transmission shaft was carried out by the reaction force of the device drive. If the device rolls inappropriately, or the device does not roll when planting even if the device tilts from side to side, the rolling characteristics will deteriorate, and the intended planting will not be able to achieve the effect of stabilizing the depth. There was a problem in not being able to make enough distant relatives.

In view of the above-mentioned circumstances, the present invention not only suppresses mud from adhering to the transmission shaft, but also suppresses mud from being pushed by the sides of the float during rolling. The purpose of planting in a shallow area is to ensure good depth stabilization.

That is, the characteristic structure of the rice transplanter according to the present invention is that the free end of the four-speed link mechanism connected to the rear of the machine and which can be moved up and down,
Through an inverted trapezoidal link mechanism in which the distance between the pair of left and right links becomes narrower on the downward side when viewed from the front, the planting device with a ground float can be connected in a rolling manner, and the planting device can be connected from the machine to the Attached is the point where the transmission shaft that transmits power to the device is located above the intersection of the virtual extension lines of the links of the inverted trapezoidal link mechanism and below the lower link of the four-speed link mechanism. This configuration provides the following effects.

In other words, since the planting device is connected to this machine via an inverted trapezoidal link mechanism, the inverted trapezoidal link is used to lift the float end on the tilted side when rolling due to the inclination of the machine. The mechanism works, and when planting during rolling, the center of rotation of the device is also at a low position close to the mud surface, and the planting works to reduce the amount of lateral sliding of the device as much as possible. Due to the synergy, mud pushing on the sides of the float due to rolling can be sufficiently suppressed.

Furthermore, since the rolling center and the axial center of the transmission shaft are set at a distance, planting by the transmission shaft and planting by the device drive reaction force make it difficult to avoid unreasonable rolling of the device as much as possible. This allows planting in the left and right directions, which is the original purpose of the rollable configuration, to stabilize the depth.

Moreover, the transmission shaft is located above the intersection of the link extension lines of the inverted trapezoidal link mechanism, which is the center of rotation of the planting device during rolling, and below the lower link of the four-speed link mechanism. Since it is set at a high position, it can be placed as high as possible while avoiding interference with the four-speed link mechanism due to rolling, and it is possible to suppress mud from adhering to the transmission shaft.

In addition, when planting using the power transmission shaft, planting due to the device drive reaction force is equipped with a spring that suppresses the tilting of the device, and when planting in the left and right directions, it is necessary to stabilize the depth. There is an advantage that it can be promoted even better.

Hereinafter, an embodiment of the present invention will be explained based on the drawings. The planting of 5-row planting is done between this machine 1 and the device 2, and the planting position remains constant or almost constant on the ground within the depth adjustment range. A driving lifting device 3 is provided which raises and lowers the seedling table 18 so that the angle of inclination to the ground becomes gradually medium as it goes upward in a height region exceeding the lifting range of the driving lifting device 3. 2 with respect to this machine 1, the rolling center to allow left and right relative rocking of both 2 and 1 is at the center of the width of the machine body, and the planting is located near the ground surface of the float 21 of the device 1. A linkage mechanism is provided which has an inverted trapezoidal shape when viewed from the front when suspended in a suspended state, and a spline fitting is provided between the output shaft 5 of the device 1 and the input shaft 6 of the device 2 so that the planting material can be expanded and contracted. The transmission shaft 7, which is made up of two transmission shaft portions 7A and 7B that are combined and is in a front-rear posture, is connected to the lower link of the link mechanism 4 whose axis is above the rolling axis P for the left-right swinging. 22B, and is interlocked and connected via a universal joint 9.9 in a horizontal position between the left and right links 8, 8 of the link mechanism.

The machine 1 is constructed as follows.

That is, the transmission case 12 having the output shaft 5 is connected to the frame 11 on which the engine 10 is mounted,
A pair of left and right steering wheels 13.13 are mounted on the front part of the mission case 12, and a transmission mechanism for the pair of left and right non-steering wheels 14, 14 is installed in the rear part of the mission case 12. A wheel support case 15.15 is fixed, and a front wheel 13.13 and a rear wheel 14.14 are fixed.
A steering handle 16 and a driver's seat 17 are provided at the upper part between the two.

The planting device 2 includes a seedling stand 18 in a forward-leaning position that can freely reciprocate in the left and right directions, a planting claw 19, and a driving mechanism for these internally, as well as a planting device having the input shaft 6. The attachment is comprised of a case 20, a grounding flow (ground flow) 21 for leveling the planting surface, and the like.

The drive elevator chamber is constructed as follows.

In other words, the parallel link mechanism 22 includes one top link 22A and a pair of left and right lower links 22B, 22B.
The front end of the top link 22A is fixedly connected to the first support shaft 24 horizontally suspended on the fixed frame 23 on the side of the machine 1, and the arm is swingable around the axis of the first support shaft 24. A second support shaft 26 horizontally suspended at the tip of the lower link 25 pivotally connects the front ends of the pair of left and right lower links 22B, 22B, and a lifting arm fixedly connected to the first support shaft 24. One elevating cylinder 28 is provided between the elevating arm 27 and the fixed frame 23, and the elevating arm 27
and the second support shaft 26 are connected through the elongated hole 29 and the bolt 30, so that the planting can be done at a certain depth until the nut 31 screwed onto the bolt 30 comes into contact with the lifting arm 27. Within the adjustment range, the top link 22A and lower link 22B,
By swinging around each of the support shafts 24 and 26 of 22B, the planting device 2 is raised and lowered while keeping the attitude of the seedling stand 18 on the ground almost constant, and the planting device 2 is raised and lowered in a height area exceeding the raising and lowering range. are a top link 22A and a lower link 22B,
22B are both swung around the axis of the first support shaft 24, the angle of inclination of the seedling stand 18 to the ground gradually becomes medium as it goes upward.

The linkage mechanism is constructed as follows.

That is, the top link 22A and the lower ring 22B,
22B is a hollow-shaped member 3 in rear view that connects the rear part with 22B.
Brackets 33 having a diagonal shape in plan view protrude laterally outwardly from the lower links 22B, 22B on both sides of the lower links 22B.
．． 33, respectively, and the pair of left and right brackets 33.
33 and the planting device 2 is carried out between the case 20 and the pair of left and right links 8, 8, so that their extension lines are at the center of the width of the center grounding float 21 and are in contact with each other. It is pivoted and connected with the entire text near the ground.

Furthermore, a pair of left and right springs 34, 34 are interposed between the member 32 and the pair of left and right links 8.8, which urge the planting device 1 to the center of the rolling range.

The elastic biasing force of this spring is used to suppress the tilting of the device 2 during planting using the transmission shaft 7 and planting accompanied by a reaction force driving the device 2.

Of the springs 34, 34, for planting using the transmission shaft 7, the spring 34 on the side receiving the device drive reaction force may be made stronger than the other.

In addition, in the above-mentioned planting, the rolling center to allow relative rocking between the device 2 and this machine 1 is preferably set at the same level, slightly above, or slightly below the contact surface of the float 21, depending on the field conditions. .

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, and FIG. 1 is an overall side view, and FIGS. 2 and 3 are a partially cutaway side view and a front view of the main parts. 1... This machine, 2... Planting device, 4...
...Inverted trapezoidal link mechanism, 7...Transmission shaft,
21... Ground float, 22... Four-speed link mechanism, 34... Spring.

Claims (1)

[Scope of utility model registration request] A four-speed link mechanism 2 connected to the rear of the machine 1 that can be raised and lowered
2, an inverted trapezoidal link mechanism 4 is provided at the free end of the link 8.
The planting device 2 with the ground float 21 is connected to the planting device 2 in a rolling manner, and the transmission shaft 7 that transmits power from the main device 1 to the planting device 2 is connected to the inverted trapezoidal link mechanism 4. The lower link 2 of the four-speed link mechanism 22 is located above the intersection P of the virtual extension lines of the links 8 and 8.
A rice transplanter installed at a lower position than 2B and 22B.