JPS6371111A - Transmission gear of transplanter - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a transmission device for a transplanter.

This applies to a transmission device for a rice transplanter or a vegetable transplanter, which is equipped with a seedling supply table that reciprocates from side to side and a transplanting tool that divides and transplants seedlings from the seedling supply table.

[Prior art]

Conventionally, power within the transplant transmission case of a transplant machine has been transmitted by a perfectly circular gear so that the rotational circumferential speed of the transmission shaft does not fluctuate.

[Problem that the invention seeks to solve]

With the conventional technology, when the transplanting tool divides the seedlings from the seedling supply table and transplants them, if the transplant claws remain in the soil surface for a long time, the planting marks left on the soil surface become large, and the seedlings may fall down after transplanting. The paddy transplanter produces floating seedlings.

There were some problems such as:

[Means to solve the problem]

This invention aims to solve the above problems.

A driven shaft 13 that is appropriately transmitted from the prime mover side, a counter shaft 15 that is transmitted from the driven shaft 13 via a clutch mechanism 18, and a counter shaft 15 that receives power from the counter shaft 15 to reciprocate the seedling supply table 5 from side to side. A transplanting transmission case 4 is provided which has a reciprocating mechanism for the seedling supply table and a seedling transplanting transmission mechanism which also receives power from the counter shaft 15.
3 and the counter shaft 15, an angular velocity variable transmission mechanism A is interposed between the seedling transplanter 9 and the counter shaft 15 so that the operating speed of the seedling transplanter 9 becomes high at least when the seedling is transplanted to the soil surface. And so.

[Operation and effect of the invention]

When each power transmission part in the transplanted transmission case is rotated from the prime mover side, angular velocity change transmission occurs between the driven shaft and the counter shaft! 149 is interposed, and each part is transmitted from this counter shaft, so the parts where the seedling feeding table moves left and right and the transplanting tool operates are subjected to high-speed rotation, and other parts are subjected to low-speed rotation. Become. In addition, in this invention, since the transplanting claw of the transplanting tool is set to operate at high speed at least when it intervenes in the soil surface and transplants the seedling, the transplant hole can be made small and the seedling can be grown in the transplant site. This eliminates situations such as lodging or transplanted seedlings rising to the surface of water and flowing away, such as when transplanting in water.

〔Example〕

1 is a transplanter, and the transplanter of this embodiment has a walking tow vehicle body 2.
The transplanter 1 is attached to the rear of the transplanter 1, and the power to the transplanter 1 is transmitted from a prime mover 3 attached to the tow vehicle body 2.

The transplanter 1 has a transplant transmission case 4 as a base body, and supports the seedling supply table 5 on the upper part of the case 4 with rails 6.7 so as to be able to move from side to side. A transplant tool 9 having the same structure is attached via a crank 1o and a swinging rod 11.

12 indicates a leveling float.

To explain the transmission mechanism inside the transplanted transmission case 4, reference numeral 13 is a driven shaft that is transmitted from the prime mover on the towing vehicle body 2 side, and in the case of the embodiment diagram, it is an input shaft. This driven shaft 13 is provided with one end protruding to the outside of the transmission case 4, and an input pulley 14 is fixed to this protruding end.

15 is a counter shaft, and this shaft 15 is rotatably installed within the transmission case 4. A set of eccentric gears 16. is provided between the counter shaft 15 and the driven shaft 13.
17, the eccentric gear 16 is wedged to the driven shaft 13 and rotates integrally with the driven shaft 13, and the eccentric gear 17 is connected to the counter shaft 15.
It is provided so that it can be turned idly and rotated freely.

18 is a clutch for stopping at a fixed position, and the eccentric gear 17
a driving clutch piece 19 integral with the counter shaft 15; a driven clutch piece 20 wedged to the counter shaft 15 so as to be movable in the axial direction;
It is made up of a spring 21 that presses the driven clutch piece 20 toward the driving clutch piece 19 and a clutch pin 22 that moves the driven clutch piece 2o against the spring 21. And one clutch piece 19 and 20 have meshing pawls 19a and 2Qa.
Further, the driven clutch piece 20 is provided with a cam surface 20b that receives rotational force and moves in a direction to suppress the spring 21 when the clutch pin 22 comes into contact with the driven clutch piece 20. That is,
When the clutch pin 22 is pulled up, the driven clutch piece 20 is moved by the spring 21 and the engaging pawls 19a and 20a are engaged, causing the counter i! II 15 is driven, clutch pin 2
2, the pin 22 comes into contact with the cam surface 20b, receives rotational force, pushes the driven clutch piece 20 against the spring 21, and the claws disengage at a certain position, causing the counter shaft 15 to move. It is configured to always stop at the same phase.

Reference numeral 23 denotes a lead force 11 shaft, and this shaft has a swivel-shaped groove with continuous left and right ends, and a lead claw 25 attached to the lead metal 24 is engaged with this groove, and the lead metal 24 is
A shaft 26 for fixing the seedlings is movable from side to side, and this moving shaft 26 protrudes outward from the left and right of the transplant transmission case 4, and its both ends are connected to the seedling supply table 5.
When the lead cam shaft 23 is rotated, the seedling supply table 5 is configured to reciprocate from side to side. A speed change transmission mechanism B is provided between the rotary cam shaft 23 and the counter shaft 15. This speed change transmission mechanism B has three gears 27a, 27 with different numbers of angles on the counter shaft 15 side.
gears 28a, 28b, 28c that mesh with these gears are wedged on the lead camshaft 23 side, and a key is bored in the lead camshaft 15. +? Ii! The tip of the sliding key 29 that moves inside the transmission case 4 is resiliently supported so as to change between a state of sinking into the key groove and a state of protruding, and the sliding key 29 is provided so as to be movable from the outside of the transmission case 4. There is.

30 is a moving piece for attaching the sliding key 29; 31 is a spring; 3
2 is a shifter, 33 is an operating rod, and 34 is an operating lever.

Reference numeral 35 denotes a drive shaft for transmitting the transplantation tool, and this shaft 35 has a gear 36 wedged on the counter shaft 15, a gear 37 free on the lead cam shaft 23 that meshes with the gear 36, and a gear 37 attached to the lead cam shaft 23 that meshes with the gear 36.
7 and a gear 38 wedged on the drive shaft 35.

A crank 1 operates the transplant tool 9 from a sprocket 39 fixed to the drive shaft 35 via a chino 40.
0 is transmitted at a transmission ratio of 1=1.

In addition, when two transplanting tools divide and transplant seedlings alternately, 1
It is necessary to transmit power at a deceleration ratio of /2.

Next, to explain the upper operation, when the driven shaft 13 is transmitted by the belt from the prime mover side, due to the meshing transmission of the eccentric gears 16 and 17 as the angular velocity change transmission mechanism A, there is no looseness on the counter shaft 15. When the driving clutch piece 19 is rotated by transmission and the clutch pin 22 is pulled out and removed from the force 11 surface 20b of the driven clutch piece 20, the engaging pawls 19a of both clutch pieces.

20a are engaged and the counter shaft 15 is rotated by transmission.

At this time, the counter shaft 15 does not rotate smoothly, but instead rotates faster and slower during one rotation.

Then, the lead cam shaft 23 is selectively transmitted from the counter shaft 15 to one of high speed, medium speed, and low speed via the variable speed transmission mechanism B, and the seedling supply table 5 is reciprocated from side to side via the lead metal 24. At this time, the reciprocating speed of the seedling supply table 5 from side to side is not constant, but may move quickly or slowly, or the total speed of movement from one side end to another side remains unchanged.

On the other hand, a drive shaft 35 is transmitted and rotated from the counter shaft 15 through a gear 36.37° 38, and from this drive shaft 35, a rotation shaft of a crank 10, which operates the transplant tool 9, is transmitted through a sprocket 39 and a chino 4o. , the transplant claw 8 of the transplant tool operates while drawing a transplant locus A. Then, the transplanting claws 8 divide and clamp one seedling at a time from the side of the seedling supply stand 5 and transplant it to the soil surface of the plant.

At this time, since the counter shaft 15 is being transmitted and rotated by the eccentric gears 16 and 17 as the angular velocity changing transmission mechanism A, the operating speed of the crank 1o naturally fluctuates, and when the seedlings are transplanted to the soil surface, the speed is high. Since it is set to
The time from when the transplant claws 8 enter the soil surface to when they are pulled up is shortened, so there is no need to enlarge the hole at the transplant site, and the transplanted seedlings may lie down or float to the surface in deep water fields. There is no such problem, and it can be transplanted accurately.

Incidentally, as the lead cam 23 rotates, the seedling supply table 5 reciprocates left and right to supply seedlings one by one to the transplanting claws 8, but the transplanting speed of the seedling supply table 5 is slowed down at the time of seedling division. Set it.

Seedling division becomes reliable.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view showing the transmission mechanism, and Fig. 4 is a side view of the main part. FIG. In the figure, the symbols 4 are a transplant transmission case, 5 is a seedling supply stand, 9 is a seedling transplanter, 13 is a driven shaft, 15 is a counter shaft, 18 is a clutch mechanism, and A is an angular velocity change transmission mechanism.

Claims (1)

[Claims] A driven shaft 13 is appropriately transmitted from the prime mover side, a counter shaft 15 is transmitted from the driven shaft 13 via a clutch mechanism 18, and the seedling supply stand 5 is reciprocated from side to side by receiving power from the counter shaft 15. A transplanting transmission case 4 having a reciprocating mechanism for a seedling supply table and a seedling transplanting transmission mechanism which also receives power from the counter shaft 15 is provided, and the driven shaft 1
3 and the counter shaft 15, an angular velocity variable transmission mechanism A is interposed between the seedling transplanter 9 and the counter shaft 15 so that the operating speed of the seedling transplanter 9 becomes high at least when the seedling is transplanted to the soil surface. .