JP3783310B2 - Rice transplanter body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used for a riding type rice transplanter.
[0002]
[Prior art]
The front frame with the front wheels attached to the left and right and the rear frame with the rear wheels attached to the left and right are connected with the rolling shaft in the front-rear direction so as to swing freely or against the spring. Accordingly, both are configured to swing. Also, a configuration in which the front frame and the rear frame are integrated has been put into practical use.
[0003]
[Problems to be solved by the invention]
In the former, the rear frame swings with respect to the front frame due to small unevenness of the cultivator, and the straightness of the rice transplanter at the time of seedling transplantation may be hindered, and the spacing between the seedlings on the forward path and the return path may be expanded or contracted. The latter is unstable when the support surfaces of the front and rear wheels are greatly twisted, such as when the front wheel or rear wheel on one side rides on a kite during turning. The present invention intends to solve both problems at the same time.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a front frame (6) having a front wheel (10) attached to the left and right and a rear frame (13) having a rear wheel (15) attached to the left and right. In a traveling body of a rice transplanter which is swingably connected by a rolling shaft (16) and the front wheel (10) is steered by a steering handle (29), a main gear box (3) is attached to the front frame (6). The rear frame (13) includes left and right rear gearboxes (12) for driving the rear wheels (15), and the power in the main gearbox (3) includes a pair of transmission shafts (27). Through which the front frame (6) and the rear frame (13) are integrated so that the front frame (6) and the rear frame (13) do not swing with each other. Provide solenoid (50) to be The left and right rotation sensors (53) for detecting the rotational speed of the transmission shaft (27) are provided, and the solenoid (usually, the front frame (6) and the rear frame (13) are integrated so as not to swing with respect to each other. 50) and when it is determined that a difference of a certain level or more has occurred in the rotational speed of the left and right transmission shafts (27) due to the input from the rotation sensor (53), the front frame (6) and the rear frame (13) are A traveling body of a rice transplanter provided with a control device (54) for outputting to the solenoid (50) so as to freely swing with respect to each other .
[0005]
【Example】
Next, an embodiment of the present invention will be described.
A seedling planting device 2 is mounted after the traveling vehicle body 1 to form a rice transplanter (FIG. 1).
The traveling vehicle body 1 is configured as follows. A pair of left and right flanges 4 extend rearward from the main gear box 3, and the respective rear ends are connected by a horizontal flange 5 to form a front frame 6 (FIG. 2). A sleeve 7 projects left and right from the main gear box 3, and a front wheel gear box 8 is attached to each projecting end so as to be rotatable about a vertical axis. A front axle 9 projects outward from each front wheel gear box 8, and a front wheel 10 is fixed to each.
[0006]
A rear wheel gear box 12 is fixed to both ends of the flange 11 to form a rear frame 13. A rear axle 14 protrudes outward from each rear wheel gear box 12, and a rear wheel 15 is fixed to each.
A rolling shaft 16 protrudes rearward from the center of the horizontal bar 5 and a pipe 17 integral with the bar 11 is swingably attached to the rolling shaft 16 (FIG. 3). A trapezoidal claw 18 is provided integrally with the rolling shaft 16 in the pipe 17. The spline 19a on the outer periphery of the ring 19 is bitten by the spline 17a on the inner surface of the pipe 17 and is pushed by the spring 20 so that the groove 21 is bitten by the claw 18. When the rear wheel 15 on one side is greatly pushed up, the spring 20 is compressed and the ring 19 moves backward, the groove 21 is separated from the claw 18 and the flange 11 (rear frame 13) swings around the rolling shaft 16. It is made to move.
[0007]
The engine 22 is fixed on the saddle 4, and its rotational power reaches the intermediate shaft 24 by the belt 23 and then reaches the main shaft 26 by the belt 25. The rotational power of the main shaft 26 is adjusted to a predetermined rotational speed by a transmission (not shown) in the main gearbox 3, and then is divided into two, one of which passes through the front wheel differential device and It is transmitted from the front axle 9 to the respective front wheels 10 through the sleeve 7 and the front wheel gear box 8, and the other reaches the respective rear wheel gear boxes 12 by a pair of transmission shafts 27 via the rear wheel differential, It is transmitted from the rear axle 14 to each rear wheel 15. In this way, when the front wheels 10 and the rear wheels 15 are rotated on the tiller by the rotational power of the engine 7, the traveling vehicle body 1 moves forward in the paddy field.
[0008]
A seat 28 is provided on the engine 22 (FIG. 1). When the steering handle 29 disposed in front of the steering wheel 29 is turned, the steering shaft 30 (FIG. 2) is rotated. The arm 31 is fixed to the lower end of the steering shaft 30, and the projecting end of each arm is connected to the projecting end of the arm 32 of each front wheel gear box 8 by the rod 33, and the pair of front wheels 10 are steered by the steering handle 29. The course is made to change.
[0009]
A pair of struts 34 extends upward from the rear part of the collar 4 (FIG. 1). Both ends of the pair of upper and lower links 35 are rotatably attached to the support column 34 and the work machine frame 36 to form parallel links. A hydraulic cylinder 37 is attached to the flange 4, and the projecting end of the piston rod 37a extending rearward and upward is connected to the projecting end of the arm 35a integrated with the upper link 35, and oil discharged from a pump (not shown) is discharged. When supplied to the hydraulic cylinder 37, the piston rod 37a protrudes to raise the work machine frame 36. When the oil is returned to the tank, the piston rod 37a returns and the work machine frame 36 is lowered.
[0010]
The seedling planting device 2 is configured as follows. A gear box 38 is swingably attached to the lower part of the work machine frame 36 with a rolling shaft in the front-rear direction. A plurality of seedling frame 39 protrudes rearward from the gear box 38, and a rotating case 40 is provided on both sides of each rear end. A pair of implantation baskets 41 is provided in each rotating case 40. Rotational power in the main gear box 3 is introduced into the gear box 38 by the transmission shaft 55. The rotational power is divided into two paths, one of which passes through each seedling planting frame 39 and reaches the rotating case 40, which is rotated counterclockwise. Then, with the planetary gear in it, the implantation pot 41 is made to turn in the same direction while maintaining the same posture.
[0011]
An L-shaped seedling receiving plate 42 is fixed to the seedling planting frame 39 so as to be horizontally long, and the tip of the planting basket 41 passes through the seedling outlet downward. A pair of struts 43 extend frontward from the front ends of the left and right seedling planting frames 39, and a seedling mount 44 is slidably supported by the front ends of the respective projecting ends and the seedling receiving plate 42. The other of the rotational powers reaches the seedling stage 44 via the lead cam, and is driven to reciprocate left and right.
[0012]
A plurality of floats 45 are arranged side by side, and can slide on the mud surface as the traveling vehicle body 1 moves forward.
Then, when the mat seedling mounting table is placed on the seedling mounting table 44 and operated, the rear end thereof reciprocates the seedling receiving plate 42 left and right. When the rear end of the mat seedling comes over the seedling outlet, the one stock is cut off by the planting pot 41. The seedlings that have been cut off are transplanted to the muddy surface where the float 45 is leveled at the lower end of the swivel.
[0013]
A fertilizer application 46 is mounted, and the fertilizer in the tank 47 is guided to the groove forming device 49 of the float 45 by the hose 48 and sprayed in the mud beside the seedling to be transplanted.
[0014]
According to said structure, when a rice transplanter advances a paddy field, the front wheel 10 and the rear wheel 15 rotate on the cultivation board. At this time, even if there are small irregularities on the cultivator and the surface on which the pair of front wheels are rotating and the surface on which the rear wheel 15 is rotating are returned, the bites of the grooves 21 and the claws 18 due to the pressing of the spring 20 The rear frame 13 does not swing relative to the front frame 6 due to the mating and mud absorption. On the other hand, when the hard road surface is uneven, or when the front wheel 10 on one side rides on the heel and the above-mentioned rotating surface is largely twisted, the spring 20 is compressed and the ring 19 moves later, so that the groove 21 becomes a claw. The rear frame 13 oscillates around the rolling shaft 16 with respect to the front frame 6 apart from 18.
[0015]
As described above, when the rice transplanter is moving forward while transplanting seedlings in the paddy field, it is desirable that the rear frame 13 is fixed to the front frame 6, and the rice transplanter is swung on the paddy headland ( When making a U-turn, the headland is roughened by the turning of the tractor and the unevenness is severe, so it is preferable to swing the rear frame 13 with respect to the front frame 6. The following configuration can cope with this.
[0016]
As shown in FIG. 4, the flange 11 of the rear frame 13 is swingably attached to the horizontal flange 5 of the front frame 6 by a rolling shaft 16 in the front-rear direction. When the solenoid 50 is fixed to the horizontal shaft 5 on the left of the rolling shaft 16 and energized, the pin 50a is pulled back. The pipe 51 is fixed to the flange 11, and the protruding pin 50a is inserted into the hole. A switch 52 is provided on both sides of the arm 31, and when the steering handle 29 is turned largely, such as when the traveling vehicle body 1 is turned on the headland, the right or left switch 52 is turned on and the solenoid 50 is energized. It is made like this. Therefore, during transplanting of the seedling, the front frame 6 and the rear frame 13 are integrated with the pin 50a, and the straightness is good. When the head frame 6 is swung on the headland, the pin 50a comes off from the pipe 51 and the rear frame 13 is free. It swings and the stability against unevenness of the cultivator is improved.
[0017]
Instead of the above configuration, the front frame 6 and the rear frame 13 can be unlocked using the difference in the rotation speeds of the left and right wheels. That is, the rotation sensor 53 is provided in each transmission shaft 27, and each rotation speed is input into the control apparatus 54 (FIG. 2). The controller 54 is configured to output and energize the solenoid 50 when a difference of a certain level or more occurs in the rotation of the left and right transmission shafts 27. Therefore, during transplanting of the seedling, the pin 50a protrudes, the front frame 6 and the rear frame 13 are integrated, and the straightness is good. When turning on the headland, the inner rear wheel 15 stops (or almost stops), and a large difference occurs in the number of rotations of the left and right transmission shafts 27. This difference causes the pin 50a to be pulled out of the pipe 51 and the rear frame 13 Oscillates freely and improves the stability against unevenness of the cultivator.
[0018]
【effect】
As described above, according to the present invention, the front frame (6) with the front wheels (10) attached to the left and right and the rear frame (13) with the rear wheels (15) attached to the left and right are the rolling shafts in the front-rear direction. (16) In a traveling body of a rice transplanter that is swingably connected in (16) and the front wheel (10) is steered by a steering handle (29), the front frame (6) includes a main gear box (3), The rear frame (13) includes left and right rear gear boxes (12) for driving the rear wheels (15), and the power in the main gear box (3) is transmitted via a pair of transmission shafts (27). Solenoid for extending and retracting a pin (50a) that is integrated so that the front frame (6) and the rear frame (13) do not swing with each other. (50), the transmission The left and right rotation sensors (53) for detecting the number of rotations of (27) are provided, and the solenoid (50) is usually provided so that the front frame (6) and the rear frame (13) are integrated so as not to swing with respect to each other. When the output from the rotation sensor (53) determines that a difference of a certain level or more has occurred in the rotational speed of the left and right transmission shafts (27), the front frame (6) and the rear frame (13) are free to each other. Since the control device (54) for outputting to the solenoid (50) is provided so that the front frame (6) and the rear frame are rearranged by the output to the solenoid (50) when seedlings are planted in a paddy field. The front frame (6) provided with the front wheel (10 ) and the rear frame (13) provided with the rear wheel (15 ) are integrated so that the frame (13) is integrated so as not to swing. And It improves straightness of rice transplanter, such as when to pivot headland large difference occurs in the rotation speed of the left and right transmission shafts (27), a rear frame and the previous frame (6) by an output to the solenoid (50) (13) and the rear frame (13) can freely swing with each other, and the stability of the rice transplanter with respect to the unevenness of the tiller is good.
[Brief description of the drawings]
FIG. 1 is a side view of a rice transplanter according to the present invention. FIG. 2 is a plan view of a part thereof. FIG. 3 is a plan view of an enlarged part of the part. Figure [Explanation of symbols]
3 Main gear box 6 Front frame 10 Front wheel
12 Rear wheel gear box 13 Rear frame 15 Rear wheel 16 Rolling shaft
27 Transmission shaft
29 Steering handle
50 Solenoid
50a pin
53 Rotation sensor
54 Control device

Claims (1)

A front frame (6) having a front wheel (10) attached to the left and right and a rear frame (13) having a rear wheel (15) attached to the left and right are swingably connected by a rolling shaft (16) in the front-rear direction. In the traveling body of the rice transplanter in which the front wheel (10) is steered by the steering handle (29), the front frame (6) includes a main gear box (3), and the rear frame (13) includes a rear wheel. Left and right rear gearboxes (12) for driving (15), and the power in the main gearbox (3) is transmitted to the left and right rear wheelboxes (12) via a pair of transmission shafts (27). ) And a solenoid (50) for retracting and retracting a pin (50a) to be integrated so that the front frame (6) and the rear frame (13) do not swing with each other. 27) Left and right to detect the rotation speed Each rotation sensor (53) is provided, and normally the front frame (6) and the rear frame (13) are output to the solenoid (50) so as to be integrated so as not to swing with respect to each other. 53), if it is determined that a difference of a certain level or more has occurred in the rotational speed of the left and right transmission shafts (27), the solenoid (6) and the rear frame (13) are allowed to swing freely with respect to each other. 50) A traveling body of a rice transplanter provided with a control device (54) that outputs to 50) .

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