JPH01312913A - Transmission device of planting in rice transplanter - Google Patents

Abstract

PURPOSE:To increase the strength of a laterally projecting case and enable reduction in exposed parts on the left and right sides of a moving shaft by providing the moving shaft for moving a seedling carrier of a rice transplanter in cases internally mounting a driving shaft for driving transplanting tools on the left and right outer ends. CONSTITUTION:A moving shaft 20 for operating a seedling carrier is constituted so as to project from both ends of side cases internally mounting a driving shaft 21 for driving seedling planting tools 23 on the left and right ends. Thereby, the extent of projection can be minimized and supported at a left and right long span to hardly damage the moving shaft 20. A sufficient strength can be provided even it the side cases are of a structure for internally mounting both the driving shaft 21 and moving shaft 20 and extended long left and right. Furthermore, since the side cases are arranged at a high level, soil lifted by the front wheels 4 and 4 is directly passed to the back without causing running resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a planting section transmission device for a rice transplanter.

Conventional technology The planting transmission device of a conventional rice transplanter has a central transmission case that envelops the left and right intermediate lead cam shafts, and a horizontal case that encloses the drive shafts that drive the left and right outer transplanting tools, and the outer end of the transverse case extends from the center transmission case that encloses the left and right intermediate lead cam shafts. Install the transmission case.

The moving shaft that operates the seedling stand, which is transmitted from the lead cam, extends out from the central transmission case in a long, exposed manner.

Problems to be Solved by the Invention In the conventional device, the moving shaft that operates the seedling stand and the horizontal case enclosing the drive shaft were configured to be independent and extend far outward to the left and right, so that the moving shaft and the horizontal case Not only did it have to increase the strength of both to ensure rigidity, but it also had the drawback of having to take sufficient precautions to prevent rust and breakage of the moving shaft.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a movement shaft 20 that moves the seedling stand 30 extending in the left and right directions, except for the left and right lateral ends, and a predetermined part in the left and right directions. A drive shaft 21 that transmits power to the seedling planting tools 23 arranged at intervals of , and a lead cam shaft 22 located at the left and right intermediate portions of this drive shaft 21 and that operates the moving shaft 20.

A transmission case 19 in which the lead camshaft 22 is housed in the left and right intermediate portions is bulged out more than the other left and right portions, and an intermediate planting transmission case 19c that extends downward from the bulge in the left and right intermediate portions, and A seedling transplanter 23 is attached to each of the planting transmission cases, and the left and right intermediate planting transmission cases 19c are connected to the planting frame 18. This is a transmission device for the planting part of a rice transplanter.

Functions and Effects of the Invention According to this invention, the moving shaft operated from the lid cam shaft that moves the wide seedling stand of the rice transplanter to the left and right of a rice transplanter for multi-row planting of 4 or more rows is the transplanting tool on the left and right outer end sides. In order to support the drive shaft that drives the inside of the case, it is possible to increase the strength of the case that extends to the side.
The exposed parts on the left and right sides of the moving axis can be reduced.

Embodiment An embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a traveling transmission case, the base of which is integrally fixed to the side of the engine 2 on the side from which the output shaft projects. It is provided at the rear of engine 2. 3.3 is a wheel transmission case, the base of which is rotatably attached to a protrusion that surrounds the drive shaft that protrudes on both left and right sides of the traveling transmission case 1, and paddy wheels 4, 4 are pivoted on the outside of the rear side. It is provided so that it can be rotated by transmission.

Reference numeral 5 denotes a hydraulic device, and a hydraulic pump 6, which is its driving source, is attached to the outside of the traveling transmission case 1 at the part where the output shaft of the engine 2 protrudes, and transmits power from the engine into the traveling transmission case 1. The first hydraulic switching valve 7, the second hydraulic switching valve 8, and the first hydraulic switching valve
A main hydraulic unit 10 having a hydraulic cylinder device 9 as a unit is attached to the upper part of the traveling transmission case 1. The first hydraulic cylinder device 9 is disposed at the center of the left and right sides of the aircraft body facing rearward, and an arm 11 that projects laterally in the left and right directions is attached to the tip side of the piston 9a, and the arm 11 is connected to the axle transmission case 3. An integral protruding rod 12.12 is connected to the base side of 3 by a rod 13.13.

At this time, a second hydraulic cylinder device 14 is interposed in the middle of the rod 13 on the left side, so that it can be expanded and contracted by hydraulic pressure. The hydraulic control circuit for this hydraulic bag w5 is as shown in FIG. The second hydraulic switching valve 8 is connected to a float and is configured to be switched when the machine body rotates left and right by an arm 17 of a weight 16 suspended from the machine body so as to be rotatable in the left and right directions.

Reference numeral 18 denotes a frame, which is formed so that a cylindrical frame is bent into a part extending in the front-rear direction and a part going backward, and the front end of the part extending in the front-rear direction is fixed to the base end of the traveling transmission case 1. There is.

Reference numeral 19 denotes a planting transmission case, which is a drive for transmitting a portion of a moving shaft 20 excluding the left and right lateral ends, which moves a seedling platform extending in the left and right directions, and seedling planting tools arranged at a predetermined interval in the left and right directions. A side case portion 19 that extends largely to the left and right sides and wraps around the shaft 21.
a, 19a, and the moving axis 2o located at the middle between the left and right sides.
An upper transmission case is provided, consisting of a slightly larger center case part 19b in which the lead camshaft 22 that operates is housed. Outer planting transmission cases 19d and 19d extending downward from the outer ends of the case parts 19a and 19b are provided, and a seedling transplanter 23 is attached to each of the planting transmission cases, and a left and right intermediate planting transmission case 19c is provided. is fixed to the frame 18.

The seedling planting tool 23 includes each of the planting tool transmission cases 19c,
The front and rear intermediate portions are rotatably attached to a crank pin 25a of a crank 25 fixed to a planting drive shaft 24 protruding outward from the transplanter 19d, and the front portion thereof is swingably attached to the transplanter transmission case. The seedling planting tool 23 is rotatably attached to an arm 26, and the rear part of the seedling planting tool 23 has a hollow case shape with a rear end bent downward, and a transplant claw 27 is fixed to the rear end. A push-out shaft 28 that moves upward and downward from inside the case protrudes from the lower end side, and a seedling pusher 29 is fixed to the end of this shaft.

As shown in FIG. 5, due to the rotation of the flank 25, the operating locus A of the lower end of the transplanting claw 27 is configured to draw a figure 8 shape in side view, intersecting at the lower end side as shown in the figure. When traveling, the lower end is sharp as shown in Fig. 6, and the hole in the planting mark becomes smaller in the front and back.When the transplant claw 27 plunges into the ground, it descends rapidly and pushes the seedling into the ground. The locus opening of the extruder 29 is raised substantially vertically so that the seedling to be planted stands upright.

The seedling planting locus A of the transplant claw 27 as described above is such that the base side pivot point X of the swing arm 26 is the lowest pivot point Y of the tip side pivot point Y to which the seedling planting fixture 23 is pivoted. It is configured so that it is ranked higher than Engineering by Q. Further, the extrusion shaft 28 is operated by a cam fixed to a crank pin 25a, and its configuration is well known, so a description thereof will be omitted.

Reference numeral 30 denotes a seedling stand, which is composed of left and right side plates and a bottom cutout, and is arranged so as to be inclined toward the front side of the rear end side of the frame 18;
Its back side is supported by a support frame so as to be movable from side to side, and at the lower front end, a seedling receiving frame 31 is attached to the frame 18 so as to be able to move up and down to prevent the seedlings mounted on the seedling stand 30 from falling. This seedling receiving frame 30 is provided with the seedling planting claws 2.
A seedling dividing opening 32 is formed in which the opening 7 intervenes from above.

The moving shaft 20 and the side plates at both left and right ends of the seedling platform 30 are interlocked by a connecting tool 33, so that the seedling platform 30 can be reciprocated and laterally moved from side to side.

In the figure, reference numeral 34 denotes a belt for vertically feeding the seedlings, which is cut through the bottom of the seedling platform 30 and stretched there, and is driven when the seedling platform 30 moves to the horizontal end. Reference numeral 35 denotes a lever that moves the seedling receiving frame 31 up and down, and is used to set the amount of seedling separation.

Reference numeral 36 denotes a control handle, which is a so-called bar handle whose base side is fixed to the rear upper end of the frame 18 and whose rear side is separated into left and right sides. 37 is an operation panel equipped with control levers and the like.

A multi-stage transmission device 38 is provided between the drive shaft 21 and the lead cam shaft 22 in the planting transmission case 19, so that the rotation speed of the lead cam shaft 22 is changed so that the moving speed of the seedling platform 30 can be adjusted. It is set in. Furthermore, a bevel gear 39 that is rotatably attached is attached to the planting drive shaft 24 in the left and right center portions, and a safety overload clutch 40 and a localization value stop clutch 41 are installed between the bevel gear 39 and the shaft 24. The gear 3 is provided on an input shaft 43 that is transmitted from the running transmission case 1 side via a drive interlocking shaft 42.
A bevel gear 44 that meshes with gear 9 is fixed. The planting drive shaft 24 is configured to transmit power to the drive shaft 21 via a chino 45.

46 is a central leveling broad, and 47 is a side leveling float, both of which are attached to an arm 49 whose rear part can be rotated up and down with a lever 48 so that the front side can be moved up and down, and the front side is attached with links 50 and 51. It is attached to the machine frame so that it can move up and down.

According to the upper configuration, the engine 2 is started and each rotating part is driven to start rice transplanting work. That is, each leveling float 4
6, 47. 47 touches the surface of the topsoil of the paddy field, and the wheels 4, 4 rotate in contact with the plowing surface to propel the machine. The operating mechanism inside the planting transmission case 19 runs from the drive interlocking shaft 42 to the input shaft 43 and then to the overload clutch 40. The central planting drive shaft 24 is rotated via the localization value stop clutch 41, and the drive shaft 21 is rotated from this planting drive shaft 24, and then the transmission device 3
8, the lead cam shaft 22 is rotated, and the moving shaft 20 is reciprocated left and right by a lead metal 22a equipped with a claw that engages with the lead groove of the lead cam shaft 22. The seedling table 30 is reciprocated left and right. The planting drive shafts 24 of the transplant transmission cases 19d, 19d on the left and right side end sides are driven from this drive shaft 21 via a chino, and the planting drive shafts 24, 24.・・・
The flank 25 attached to is rotated. Therefore, the planting claws 27 of each transplanting tool 23 draw a planting trajectory A, and in cooperation with the seedling pusher 29, one seedling placed on the seedling platform 30 is removed from the dividing opening 32 of the seedling receiving frame 31. It is separated into parts and planted on the surface of the paddy field surface, which is leveled by leveling floats 46, 47, and 47 at the bottom.

During such work, if the tiller changes in the front-back direction by becoming shallower or deeper, the front part of the central soil leveling float 46 will move up and down, and the rod 15 will move. The first hydraulic switching valve 7 is switched, the first hydraulic cylinder device 9 is operated, and the left and right water Eft vehicles are transported 4,
4 move up and down together to maintain the height of the aircraft within a certain appropriate range. In addition, when the tiller changes to the left or right, the machine body tilts to the left or right, but at this time, since the weight 16 always hangs down vertically, the left and right tilt angle of the machine body is detected, and the second hydraulic pressure is The switching valve 8 is switched and the wheels 4 on one side are controlled up and down to restore the aircraft to a horizontal state.

Therefore, the machine is controlled so that it is always horizontal to the left and right, and when the depth of the tiller changes in the direction of travel, the machine is moved up and down, and the machine is propelled while its attitude is controlled, and the seedlings are planted. The depth is maintained at an appropriate constant state.

The moving shaft 20 that operates the commercial table 30 is configured to protrude from both ends of the side case that houses the drive shaft 21 that drives the seedling planting tool 19 at the left and right ends, so that the amount of protrusion can be kept to a minimum. It is possible to support the moving shaft 20 with a long span from side to side, making it difficult for the moving shaft 20 to be damaged.The side case has a structure in which both the driving shaft 21 and the moving shaft 20 are housed inside, so that it can be supported even if it extends long from side to side. It can provide strength, and the second side case is placed in a high position, so
The soil lifted by the front wheels 4, 4 passes straight to the rear and does not become a running resistance.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a back sectional view of the main part, Fig. 2 is a side view of the main part, Fig. 3 is a side view of the whole, and Fig. 4 is a hydraulic pressure The circuit diagram, FIG. 5 is a side view explaining the operation of the planting tool, and FIG. 6 is a side view showing the locus of the planting tool. In the figure, symbol 18 is a planting frame, 19 is a transmission case, 19C is an intermediate planting transmission case, 19d is an outer planting transmission case, 2
0 is a moving axis, 21 is a drive axis, 22 is a lead cam axis, 23
30 indicates a seedling planting tool, and 30 indicates a seedling stand.

Claims (1)

[Claims] A moving shaft 2 that moves the seedling stand 30 that extends in the left and right directions.
A drive shaft 21 that transmits the seedling planting tools 23 arranged at a predetermined interval in the left and right directions except for the left and right lateral ends of the drive shaft 21 and a drive shaft 21 that operates the moving shaft 20 located at the left and right middle part of this drive shaft 21. The lead cam shaft 22 is connected to the lead cam shaft 22 at the left and right middle portion.
A transmission case 19 is provided in which the inner portion of the transmission case 19 is bulged out more than the other left and right portions, and an intermediate planted transmission case 19c extends downward from the bulge in the left and right intermediate portions, and a transmission case 19c extends downward from the left and right outer ends. The outer planted transmission case 19 extends
d, a seedling transplanter 23 is attached to each planting transmission case, and a left and right intermediate planting transmission case 19c is fixed to a planting frame 18.