JPH0213315A - Structure of transplantation operation part of transplantation machine - Google Patents

Abstract

PURPOSE:To reduce the size of a gear case and decrease the weight of the machine as a whole by including a lead cam shaft into a cylinder made of a synthetic resin at the middle part and fitted with a metallic frame at the end part and attaching the cylinder to a gear case to which rotational power is transmitted from an engine. CONSTITUTION:A transplantation frame is constructed of 5 members P1-P5 divided with dividing planes F1, F2 and F3. A cylinder 20 including built-in transfer shaft 54 and lead cam shaft at the right and left middle part and a gear case 21 containing a transplantation shaft are attached to the top and bottom of the transplantation frame 12. The middle part of the cylinder 20 is constructed of the member P5 and the transfer shaft and the lead cam shaft are supported by the members P2 and P3. Accordingly, no large load is applied to the member P5 to enable the use of a light plastic pipe as the member P5 and the reduction of the weight of the frame.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a planting section of a rice transplanter.

[Conventional technology] A prime mover is mounted on the front of the machine, and while the machine travels with wheels driven by the prime mover, a planting section installed at the rear of the machine plants sagebrush in the field. Widely used.

The planting section is provided with a transmission case that receives rotational power from the prime mover, and the rotational power transmitted to the transmission case drives the planting device and the +Yi mounting table.

[Problems to be Solved by the Invention] In the transmission case of the planting work section, there is a lead cam shaft that reciprocates the seedling stand from side to side, a bevel gear device for transmission, and a drive for driving the planting device. In conventional rice transplanters, the transmission case was formed as one large metal box, which housed the shaft, etc., which caused problems in that it was bulky and difficult to reduce the weight of the machine.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the structure of the planting work section of the rice transplanter according to the present invention includes a planting section gear case that receives rotational power from the prime mover, a lead cam shaft that rotates with the rotational power and reciprocates the seedling platform from side to side, and The structure of the planting work part includes a planting device that is driven by foot rotational power and plants the seedlings on the seedling stand in the field, and the cylindrical part that houses the lead cam shaft is provided separately from the planting part gear case. The central part of the cylindrical part is made of a synthetic resin pipe, and metal frames are provided at both ends of the pipe, and the cylindrical part is attached to the planting part gear case by this frame, and the planting part gear case is attached to the planting part gear case. It is characterized by being attached to the frame of the traveling aircraft using the supporting legs provided on it.

[Function] The lead camshaft is housed in a cylindrical part whose central part is made of synthetic resin and has a metal frame at the end, and is attached to the gear case that transmits the rotational power from the prime mover, so the size of the gear case can be reduced. It is possible to reduce the size and overall weight.

[Example] The embodiments shown in the drawings will be described below.

This walk-behind rice transplanter 1 is a 4-row transplanter, and has a running part mission case 2, an engine 3, a hydraulic unit 4, etc. arranged at the front of the machine body, and a rotating part protruding from the side of the mission case 2. A transmission case 6.6 is provided at the ends of the cylindrical parts 5, 5 facing upward and downward on rotating shoulders, and a paddy wheel 7.7, which is a grounding wheel for supporting the aircraft body, is attached to the rear end of the transmission case. It is being

A main frame 9 is fixedly connected to the rear of the mission case 2 at its base side. The main frame 9 extends rearward through the lower part of the fuselage, is curved at the middle part, and has a shape in which the rear part jumps diagonally upward. Then, a planting work part mounting bracket lO is fixed to a position slightly in front of the curved part, and the bracket 10
, a planting section frame 12 having a transmission mechanism therein, and a planting device 13 attached thereto. ..., [A planting work section 15 consisting of a Yoshii stand 14 and the like is attached. Further, a handle rod 17 is attached to the rear end of the main frame 10.

The planting section frame 12 has a cylindrical section 20 that incorporates a moving shaft and a lead cam shaft in the left and right center portions, and a gear case 21 that incorporates a planting shaft above and below, and a transmission pipe 22 ( L, R) are protruded from the center of the gear case 21 and the left and right pipes 22 (L
, R), a chain case 23 (C, L, R) is superimposed on the end portion of the chain case 23 (C, L, R). Then, a total of 4 sets of planting devices are provided, one set each on both sides of the cylindrical part 23a at the lower end of the central chain case 23 (C), and one set each on the inner surface of the lower end of the left and right chain cases 23 (L, R). 13. ...is provided.

Moreover, the central chain case 23 (C) serves as a leg part for fixing the planting part frame, and a bracket 24 on the planting part side is fixed to the lower end thereof.

The planting section frame 12 is fixed to the bracket 10 of the main frame 9 using this bracket 24 with bolts. Furthermore, support rods 25.25 extending rearward are integrally provided at the lower ends of the left and right chain cases 23 (L, R), and seedlings are placed on the −F side of the curved rear ends of the support rods. A stand support frame 26 is horizontally suspended.

In the figure, 87 is a fork-shaped wheel mark eraser when viewed from the front;
The wheels 7, 7 are supported by a support member 88 fixed to the support rod 25.
It is supported at the rear of the field, and is designed to drown out the traces of the wheels on the field surface. The seedling stand 14, which is inclined so that the front part is lower, is supported so as to be slidable left and right by the seedling stand support frame 26 and the rail 29 attached to the support member 28 fixed to the rear end of the main frame 9. has been done. The seedling tray 14 has four seedling trays 14a whose top surfaces are equally divided.

. . . It is a table partitioned by closing, and each seedling mounting part 14a,
A W feed device 30 that sends vinegar on the table downward every time...
... is provided. A seedling guide rod 31 is horizontally suspended at the front end of the upper surface at a height of about half the height of the seedling.

Furthermore, branch rods 32 are provided at predetermined intervals from this seedling guide rod 31,
... are provided in parallel along the M mounting table 14. 1
On the lower side of the official board table 14, there is a single cup outlet 33.corresponding to each of the bacteria loading sections 14a, . ... is formed on the pedestal 34
is provided integrally with the seedling stand support frame 26. Furthermore, a float support rod 35 for supporting a float (to be described later) is installed horizontally on the left and right support rods 25, 25 so as to be rotatable around an axis. A planting depth adjustment lever 84, which will be described later, is attached to this float support rod 35.

These planting work sections 15 (portions surrounded by imaginary lines in Fig. 3) are assembled as one unit, and the brackets 24 of the planting section frame and the brackets 10 of the main frame are fastened together with bolts or the like. As a result, the entire assembly is attached to the main frame 9 as one piece. In this embodiment, the support member 28 and the rail 29 are fixed to the main frame 9 side, but depending on the case, they may also be assembled to the planting work section 25 side.

Next, to explain the mechanism inside the planting part frame 12, a transmission shaft 40 connected to the mission case 2 and taking out rotational power passes above the main frame 9 and is connected to the gear case 2.
1, and the rotational power of the transmission shaft is transmitted to the gear case 21.
It is transmitted via bevel gears 42, 43 to a drive shaft 41 mounted therein. A fixed position stop F clutch 45 is interposed between the planting shaft 41 and the bevel gear 43, so that when the transmission shaft 40 stops rotating, the planting shaft 41 stops at a predetermined rotational position. . Furthermore, the rotational power of the planting shaft 41 is supplied to a chain 747 suspended in the chain case 23 (C, L, R). A crankshaft 48 (C) is pivotally supported at the lower end of the chain case by...

L, R). The central crankshaft 48 (C) has a crank 50° attached to both left and right ends, and the left and right crankshafts 48 (L, R) have cranks 50° attached to their inner ends. The planting rod 52 of the planting device 13 is supported by the crank 50 and the link 51 attached to the chain case, and when the crankshaft 48 rotates, the planting claw provided at the tip of the planting rod 52 follows a predetermined trajectory. By drawing and moving up and down, the seedlings on the seedling platform 14 supplied to the seedling outlet 33 are planted in the field.

On the other hand, inside the cylindrical part 20, there is a moving shaft 54 that is slidable in the axial direction and has both ends protruding outside, and a spiral groove in which a lead metal claw 55 attached to the center of the moving shaft engages. A lead camshaft 57 with a cutout 56 on the outer circumference is provided.

Seedling stand support arms 58, 58 are fixed to both ends of the moving shaft 54, and the tips thereof are connected to bolts provided on the bottom side of the seedling stand 14 with mounting nuts 59. The lead cam shaft 57 is connected to the planting shaft 4 via a transmission device 60 with gears provided at one (left) end of the cylindrical portion 20 and the gear case 21.
Transmitted from 1. Further, a driven camshaft 62 is provided on the side opposite to the side where the transmission 60 is provided, and a cam mechanism 63 is configured by a lead cam on the lead camshaft 57 side and a pair of driven cams on the driven camshaft 62 side. There is. Driven camshaft 6
An arm 65 for operating the seedling feeding device 30 of the fiY= table is attached to the outer end of the fiY=. When the lead cam shaft 57 rotates, the claw 56 of the moving shaft moves along the groove 57 of the lead cam shaft, so that the moving shaft 54 moves to (+T).
It moves left and right together with the platform 14. When the moving shaft 54 reaches the end of the left and right processes, the driven cam shaft 62 rotates in a predetermined direction by the action of the cam mechanism 63, the seedling feeding device fi30 is started, and the seedlings are moved by one row in the direction of the seedling expansion port 33. Transfer to.

This planting part frame 12 has a cylindrical part 20 in a side view.
The gear case 21 is arranged along the outer periphery of the paddy wheel 7, and the cylindrical part 20 is provided in front of the gear case 21. In addition, each chain case 23 (C, L, R) is inclined so that the lower part is at the front, and a space 7 is formed between this and the support rod 25 provided at an acute angle.
0 is formed, and the bottom of the seedling stand 14 is located within the space 70. Therefore, the planting shaft 41 in the planting section frame 12, the mounting nut 59 of the seedling stand 14, and the float support rod 35 are arranged substantially in a straight line. By configuring in this way, the planting section frame 12
The center of gravity of the seedling stand 14 is provided relatively forward, and the seedling stand 14
Since it can be provided close to the planting part frame 12, the center of gravity of the aircraft is located closer to the planting part frame 12 compared to conventional ones, which improves maneuverability and shortens the overall length of the aircraft. I can do it. In addition, by bringing the bottom of the seedling stand 14 closer to the planting section frame 12, the planting rod 5
2 can be reduced, and planting accuracy can be improved. The loading table support arm 58 is connected to the pipe 2
2 and the left and right Cheno cases 23,
It is curved upward in a convex shape when viewed from the side. The seedlings on the seedling stand 14 are fed to the seedling outlet 33 with their orientation aligned by the branching body 32 and pressed and bent in the -E direction by the guide rod 31, so that the seedlings are not scratched by the planting rod 52. As well as the removal being carried out well.

αf will not come into contact with the planting part frame 12 and be worn out.

Furthermore, as shown in FIG. 4, this planting section frame 12 has a dividing surface F1 provided at the left end of the cylindrical section 20 and the gear case 21. It is composed of five members PC1 to PC5) divided by a dividing plane F2 provided at the right end of the cylindrical part 20 and a dividing plane F3 which vertically divides the central chenoke case 23(C). That is, the member PI consists of the center portion of the gear case 21, the left side portion of the central cheno case 23(C), and the cylindrical portion 23a. The member P2 includes the portion 72 of the cylindrical portion and the drive shaft portion that accommodates the transmission 60. and left power transmission vibe 22 (
It consists of a left chain case 23 (L) and a left chain case 23 (L). Part P3
is a gear case 21 with a support flange 73 integrally molded.
, the right side part of the central chain case 23 (C), the right transmission pipe 22 (R), and the right chain case 23 (R). The left and right cenocases 23 (L, R) are integrally molded into a bag shape with two open ends, and the openings are closed with a lid 74, so that there is no joint on the paddy field side. Therefore, it is difficult for muddy water etc. to enter the case during work, making it highly watertight. When storing the chain in the chain case, hang the lower sprocket suspended by the chain from the open C' fi8, and attach the crankshaft 4 to this sprocket with the sprocket in a predetermined position.
The member P4, into which the cam mechanism 63 is inserted, constitutes the right end portion of the cylindrical portion 20 in which the cam mechanism 63 is housed, and is attached to the support flange 73. Further, the member P5 constitutes the center portion of the cylindrical portion 20. Moving shaft 54 and lead cam shaft 5
7 is supported by members P2 and P3, so no large load is applied to this member P5.

Therefore, it is possible to reduce the weight of the frame by molding P5 with a lightweight vibrator made of synthetic resin such as vinyl chloride.

At the bottom of the fuselage, there is a center float 80 that is long in the front and back, and a pair of relatively small left and right side floats 8 that serve as grounding bodies.
1.81 is attached to the float support rod 35. The installation method is such that the support piece 82 of the float is rotatably attached to the tip of an arm 83 fixed to the support rod 35, and the planting depth is adjusted by rotating the support rod 35 around the axis using the 8-84. By doing so, the support height of the float can be changed. The front part of the center float 80 is suspended by an expansion/contraction link 85, and the tip part of the side float 81 is suspended by a height detection link described later.

Further, in a part of the machine body, a preliminary seedling mounting stand 99 is supported almost horizontally by a support frame 97 and a support 98 attached to the planting section frame 12.

Next, the body control device of this rice transplanter I will be explained.

A pitching cylinder 90 for raising and lowering the aircraft is provided extending rearward from the rear of the hydraulic unit 4, and a link plate 92 biased backward by a spring 91 is attached to the tip of the piston rod on the left and right water surfaces. . The left and right ends of the link plate 92 are connected to the upper ends of swing arms 94, 94 which project upward from the five-turn cylinder 5.5 via connecting rods 95 (L, R). and,
A rolling cylinder 96, which is a rolling means for the fuselage, is interposed in the middle of the left connecting rod 95(L).

The hydraulic unit 4 is provided with a switching valve lOO for the pitching cylinder 90 and a switching valve 101 for the rolling cylinder 96. The upper end of a rod 103 for detecting the field height attached to the center float 80 is connected to the valve shaft of a pitching switching valve lOO, and in response to the upward movement of this detection rod 103, the pitching switching valve lOO is Can be switched. In addition, the left and right tilt detection device 1 described below
05, the rolling switching valve 101 is switched. This left/right tilt detection device 105 is connected to the mission case 2.
A rotation shaft 1 is installed inside the cylindrical bodies 106, 106 protruding from the sides of the
07, 107, and a plate-shaped swing link 109 is fixed to the outer end of the rotation shaft. The swing link 109 is provided with an elongated hole 110, into which the sleeve 111 provided at the tip of the side float 81 is loosely fitted, so that it swings in response to one downward movement of the side float 81 by more than a predetermined value. Link 109
sways. On the other hand, a rotating arm 113 is attached to the inner end of the rotating shaft 107, and a rod 115 is attached to the rear end of the rotating arm. It is connected to both left and right ends of the balance rod 116.

The balance rod 116 is rotatably supported by a bearing member 118 through a shaft 117, and the spool of the rolling switching valve 101 is driven in accordance with the rotation of the shaft 117.

Next, to explain the control action, the center float 8
The height of the field is detected by the detection rod 103 attached to the bitching IjJ8 valve 100 accordingly.
is switched, and the pitching cylinder 90 performs an expansion and contraction operation, and then the swing arms 104, 104 are rotated back and forth via the connecting rods 95 (L, R), and the left and right paddy wheels 7, 7 simultaneously move the aircraft by the same amount. As the machine moves up and down, the machine moves up and down, keeping the planting depth of the seedlings constant.

Furthermore, when the field slopes to the left or right, the rod 115 on the side that has moved up is lifted up and the rod l15 on the side that has moved down is pulled down, thereby rotating the balance rod 116. Accordingly, the rolling switching valve 101 is switched, and the rolling cylinder 96 performs an expansion and contraction operation, then the left paddy wheel 7
Only (L) moves up and down relative to the aircraft to correct the left and right inclination of the aircraft.

In addition, as shown in FIGS. 6 and 7, the planting section frame 12 has two wooden legs 23 (
C) and 23' (C) may be provided and fixed to the main frame 9 so that the main frame 9 is sandwiched between these two parts.

C. Effects of the Invention As is clear from the above explanation, the structure of the planting work section according to the present invention is such that the lead cam shaft for moving the seedling table is housed in a cylindrical part separate from the gear case, and this cylindrical part is located in the center. Since the parts are made of synthetic resin, it has become possible to reduce the weight of the planting work part as a whole.

[Brief explanation of the drawing]

Fig. 1 is a side view of an example of a rice transplanter according to the present invention; Fig. 2 is a top view thereof; Fig. 3 is a side view of its main parts; Fig. 4 is a front view of its main parts; and Fig. 5 is a main part thereof. Fig. 6 is a perspective view of a different embodiment, and Fig. 7 is a cross section thereof. 1... [Rice transplanter, 2... Traveling part mission case,
3... Engine, 4... Hydraulic unit, 7... Paddy wheel, 12... Planting part frame, 15... Planting work part, 20... Cylindrical part, 21... Gear case , 57・
...Lead cam shaft 89...Center frame, 81...
・Side float.

Claims (1)

[Claims] (1) A planting part gear case that receives rotational power from a prime mover, a lead cam shaft that rotates with the rotational power and reciprocates the seedling platform from side to side, and is driven by the rotational power,
This is a structure of a planting work part having a planting device for planting seedlings on a seedling stand in a field, wherein a cylindrical part for storing the lead cam shaft is provided separately from a planting part gear case, and a central part of the cylindrical part is provided. is composed of a synthetic resin pipe, and a metal frame is provided at both ends of the pipe, and the cylindrical part is attached to the planting part gear case by this frame, and the planting part gear case runs on the supporting legs provided on this frame. The structure of the planting work section of a rice transplanter, which is characterized by being attached to the frame of the machine.