JPH0773452B2 - Rice transplanter planting unit transmission device - Google Patents

Description

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

2. Description of the Related Art A conventional planting transmission device of a rice transplanter has a lateral case that wraps a drive shaft that drives left and right outer implants from a central transmission case that encloses the lead cam shaft in the middle of the left and right sides, and an outer part is planted at the outer end. A moving shaft attached with an attached transmission case and operating the seedling table transmitted from the lead cam was extended from the central transmission case so as to be exposed to the outside for a long time.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional device, since the moving shaft that operates the seedling mounting table and the lateral case that encloses the drive shaft are independently extended far outwards in the left and right directions, respectively, the moving shaft and the lateral case are formed. Not only is it necessary to increase the strength and ensure rigidity, but there is also the drawback that the rust prevention and damage of the moving shaft must be taken into consideration.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a predetermined left-right direction and a part excluding the left-right lateral ends of a moving shaft 20 that moves a seedling mounting table 30 extending in the left-right lateral direction. And a lead cam shaft 22 for activating the moving shaft 20 at the left and right intermediate portion of the drive shaft 21 for transmitting the seedling planting tools 23 arranged at intervals. The transmission case 19 in which the interior part bulges more than other left and right parts is provided, and the transmission part 19c with an intermediate part extending downward from the bulging part of the left and right intermediate parts and the left and right outer end parts downward. And a seedling transplanter 23 is attached to each of the planting transmission cases, and the left and right middle portion planting transmission cases 19c are fixed to the planting frame 18. It is an auxiliary transmission device.

EFFECTS AND EFFECTS OF THE INVENTION According to the present invention, a transplanter having a moving shaft actuated by a lid cam shaft that moves a seedling mounting table of a rice transplanter having a wide range to the left and right of a multi-row rice transplanter with four or more rows is an outer end side on the left and right The strength of the laterally projecting case can be increased in order to provide an instruction to dispose the drive shaft for driving the drive shaft inside the case, and the exposed portions on the left and right sides of the moving shaft can be reduced.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a traveling transmission case, which has a base portion integrally fixed to a side portion of an engine 2 on a side from which an output shaft thereof projects. It is provided in the rear part of 2. Reference numerals 3 and 3 denote wheel transmission cases. A base portion is rotatably attached to a protruding portion that encloses a drive shaft protruding to both left and right sides of the traveling transmission case 1, and paddy wheels 4 and 4 are pivotally attached to the outer side on the rear side. Therefore, it is provided so as to be rotated by transmission.

Reference numeral 5 denotes a hydraulic device, and a hydraulic pump 6 which is a drive source thereof is attached to an outer portion of the traveling transmission case 1 at a portion where the output shaft of the engine 2 projects, so that power is transmitted from the engine into the traveling transmission case 1. If it is operated, the first hydraulic pressure switching valve 7, the second hydraulic pressure switching valve 8 and the first hydraulic pressure switching valve 7 are configured to be driven.
A main hydraulic unit 10 having a hydraulic cylinder device 9 as a unit is attached to the upper portion of the traveling transmission case 1. The first hydraulic cylinder device 9 is disposed rearward at the left-right center of the machine body, and an arm 11 protruding laterally in the left-right direction is attached to the tip side of the piston 9a, and the tip and the wheel transmission case 3, Projection rod 12 integrated on the base side of 3,
12 and 12 are connected by rods 13 and 13. At this time, a second hydraulic cylinder device 14 is inserted 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 of the hydraulic device 5 is as shown in FIG. 4, and the first hydraulic switching valve 7 has the valve shaft via the rod 15 so that the first hydraulic switching valve 7 can be switched by the movement of the front part of the central grounding float which will be described later. Is connected to the float, and the second hydraulic pressure switching valve 8 is hung on the body so as to be rotatable in the left and right directions.
Is configured to be switched when the machine body is rotated left and right.

Reference numeral 18 denotes a frame, which is formed by bending a tubular frame into a portion extending in the front-rear direction and a portion extending rearward, and the front end of the portion 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 seedling planting tool arranged at a predetermined interval in the left-right direction and a portion except for the left-right lateral ends of a moving shaft 20 for moving a seedling mounting table extending in the left-right lateral direction. Side case portions 19a, 19a that greatly extend to the left and right sides that surround the shaft 21.
And, a higher transmission case consisting of a slightly larger center case portion 19b in which the lead cam shaft 22 for operating the moving shaft 20 is also provided in the middle portion of the left and right sides is provided downward from the sensor case 19b in the middle portion of the left and right. An intermediate portion planted transmission case 19c extending toward the outside and an outside portion planted transmission case 19d, 19 extending downward from the outer ends of the side case portions 19a, 19b.
d and the seedling transplanting device 23 is attached to each of the planted transmission cases, and the left and right middle portion planted transmission cases 19c are attached to the frame 1.
Sticked to 8.

The seedling planting device 23, the front and rear intermediate portion of the crank pin 25a of the crank 25 fixed to the planting drive shaft 24 protruding to the outside of each planting device transmission case 19c, 19d is rotatably attached, The front part is rotatably attached to an arm 26 swingably attached to the transplant tool transmission case, and the rear part of the seedling planting tool 23 has a hollow case-like shape with its rear end facing downward. It is bent, the transplanted nail 27 is fixed to the rear end,
Further, an extruding shaft 28 that vertically moves downward from the inside of the case projects on the lower end side, and a seedling extruding member 29 is fixed to this shaft end.

Then, as shown in FIG. 5, by the rotation of the flank 25, the operation locus a at the lower end of the transplanted nail 27 is configured so as to draw an eight-character shape in a side view intersecting at the lower end side as shown in the figure. As shown in FIG. 6, when the vehicle is running, the locus of the planting trace is configured to be small in the front and rear along the locus a ₁ having a sharp lower end.
When the plunge plunges into the ground, it rapidly descends to push the seedlings into the ground. The locus mouth of the pusher 29 is raised substantially vertically so that the seedlings to be planted stand upright.

Incidentally, the seedling planting locus a of the transplanting claw 27 as described above has a swinging lowermost point Y of the base side pivotal support point X of the swinging arm 26 and the tip end side pivotal support point Y on which the seedling planting tool 23 is pivoted. It is configured to be l higher than ₁ . The operation of the push-out shaft 28 is moved by a cam fixed to the crank pin 25a, and the construction thereof is well known, and therefore its explanation is omitted.

30 is a seedling mounting table, which is composed of left and right side plates and a bottom plate, is arranged in a state of inclining to the front end of the rear end side of the frame 18, and the rear surface side thereof is movably supported by a support frame to the left and right, At the front lower end, a seedling receiving frame 31 for preventing the seedlings mounted on the seedling mounting table 30 from falling is attached to the frame 18 so that the seedling receiving frame 30 can be adjusted to move up and down. A seedling dividing port 32 is formed to intervene from above.

The moving shaft 20 and the side plates at the left and right ends of the seedling mounting table 30 are interlocked with each other by a connecting tool 33 so that the seedling mounting table 30 reciprocates laterally laterally.

Reference numeral 34 in the drawing denotes a seedling longitudinal feed belt which is formed by piercing the bottom plate portion of the seedling mounting table 30 and stretched there, and is driven when the seedling mounting table 30 moves to the lateral end. Reference numeral 35 is a lever for moving the seedling receiving frame 31 up and down, which stretches the seedling separating amount.

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

The drive shaft 21 and the lead cam shaft 22 in the planted transmission case 19
A multi-speed transmission 38 is provided between the lead cam shaft 22 and
The rotation speed of the seedling mounting table 30 is changed so that the moving speed of the seedling mounting table 30 can be adjusted. Further, a bevel gear 39 that is rotatably attached is attached to the planting drive shaft 24 in the left and right central portions, and a safety overload clutch 40 and a fixed position stop clutch 41 are provided between the bevel gear 39 and the shaft 24. A bevel gear 44 that meshes with the gear 39 is fixed to an input shaft 43 that is transmitted from the traveling transmission case 1 side via a drive interlocking shaft 42. The drive shaft 21 is configured to be transmitted from the planted drive shaft 24 via the chain 45.

46 is a central leveling float, 47 is a side leveling float,
Both of the rear parts are attached to an arm 49 whose front part can be vertically adjusted by a lever 48 so that the front part can be vertically rotated, and the front part is attached to a machine frame by links 50 and 51 so as to be vertically movable.

According to the configuration of the above example, the engine 2 is started to drive the rotating parts to start rice transplanting work. That is, each leveling float 4
6,47,47 touches the surface soil surface of the paddy field, and the wheels 4,4 rotate in contact with the cultivating surface to propel the aircraft. The actuation mechanism in the planted transmission case 19 consists of the drive interlocking shaft 42, the input shaft 43, the overload clutch 40, the localization stop clutch 41, and the central planted drive shaft 2.
4 is rotated, the drive shaft 21 is rotated from the planted drive shaft 24, and then the lead cam shaft 22 is rotated via the transmission 38, and the lead metal equipped with the claws that engage with the lead groove of the lead cam shaft 22. The moving shaft 20 is reciprocated left and right by 22a, and the seedling mounting table 30 is reciprocated left and right from this moving shaft 20 via a coupling tool 33. The drive shaft 24 of the transplant transmission cases 19d, 19d on the left and right lateral ends is driven from the drive shaft 21 via the chain, and the flanks 25 attached to the drive shafts 24, 24, ... Are rotated. It Therefore, the planting claw 27 of each transplanter 23 draws a planting locus a, and the seedlings placed on the seedling placing table 30 in cooperation with the seedling extruding unit 29 are transferred from the split mouth 32 of the seedling receiving frame 31 to one plant. It is planted on the surface soil of the paddy field, which is separated and divided by the lower leveling floats 46, 47, 47.

Then, during such work, when the cultivator becomes shallower or deeper in the front-rear direction, the front part of the central leveling float 46 moves up and down, and the rod 15 moves. The first hydraulic pressure switching valve 7 is switched and the first hydraulic cylinder device 9 is actuated so that the left and right paddy wheels 4, 4 move up and down together to maintain the machine body height within a certain proper range. Also, when the cultivator is changing to the left and right, the machine leans to the left and right, but at this time, since the weight 16 always hangs vertically, the horizontal tilt angle of the machine is detected, and the second hydraulic pressure is thus detected. The switching valve 8 is switched and the wheel 4 on one side is vertically controlled to restore the aircraft to a horizontal state.

Therefore, while the machine is always controlled so that it is in a substantially horizontal state to the left and right, and when the depth of the cultivator changes in the direction of travel, the machine is raised and lowered and the attitude is controlled to propel the machine and plant seedlings. The depth is maintained at a proper constant state.

Since the moving shaft 20 that operates the seedling mounting table 30 is configured to project from both ends of the side case that internally houses the drive shafts 21 that drive the seedling planting devices 19 on the left and right ends, the minimum projecting amount is obtained. It is possible to support with a long span to the left and right, this moving shaft 20 is less likely to be damaged, and the side case is the moving shaft of the drive shaft 21
It has a structure in which 20 and 20 are installed together, and it can have sufficient strength even if it extends to the left and right for a long time.Furthermore, since this side case is located at a high position, the front wheels 4, 4
The soil picked up by does not pass backwards and does not become a running resistance.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a back cross-sectional view of a main part, FIG. 2 is a side view of the main part, FIG. 3 is a side view of the whole, and FIG. FIG. 5 is a circuit diagram, FIG. 5 is a side view for explaining the operation of the planting tool, and FIG. 6 is a side view showing the locus of the planting tool. Symbol 18 in the figure is a planting frame, 19 is a transmission case, 19c is an intermediate planting transmission case, 19d is an outer planting transmission case, 20 is a moving shaft, 21 is a drive shaft, 22 is a lead cam shaft, and 23 is Seedling planting equipment, 30
Indicates a seedling stand.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshio Tamai No. 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Prefectural Engineering Department, Iseki Agricultural Machinery Co., Ltd. Technical Department Examiner Jun Koriyama

Claims (1)

[Claims] 1. A drive shaft for transmitting a portion of a moving shaft 20 that moves a seedling mounting table 30 that extends in the lateral direction in the lateral direction except for the lateral ends of the moving shaft 20 and a seedling planting tool 23 arranged at a predetermined distance in the lateral direction. 21 and a lead cam shaft 22 for operating the moving shaft 20 in the left-right intermediate part of the drive shaft 21, the transmission case in which the part of the left-right intermediate part that houses the lead cam shaft 22 swells more than other left and right parts
19 are provided, and an intermediate portion planted transmission case 19c extending downward from the bulge portion of the left and right intermediate portions and an outer portion planted transmission case 19d extending downward from the left and right outer end portions are provided. A planting section transmission device of a rice transplanter, in which a seedling transplanting device (23) is attached to the attached transmission case and the left and right intermediate portion planting transmission case (19c) is fixed to the planting frame (18).