JPH11168925A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter so designed that a brake arm is installed inside a rotary case in such a manner that the brake arm support is situated at a position differing from that of a gear axis so as not to cause malrotations of gears set up inside the rotary case as well as not to limit the length and/or position of the brake arm. SOLUTION: This transplanter is so designed that a planter arm 16 is provided on the end of a rotary case 9 fixed on a planting drive shaft 10 and the posture of the planter arm 16 is controlled via a row of gears installed inside the rotary case 9, and a brake arm 26 is also installed inside the rotary case 9 in such a manner that the brake arm support 29 is situated at a position differing from that of a gear axis; wherein it is possible that the brake arm 26 is disposed so as to cross over the row of gears as well as energized with a brake spring 28 disposed along the row of gears.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of transplanters such as rice transplanters.

[0002]

2. Description of the Related Art Generally, in this seed transplanter, a planter arm for planting transplanted seedlings with the rotation of the rotary case is provided at an end of a rotary case fixed to a planting drive shaft. Is controlled via a gear train (e.g., an eccentric gear train transmitting irregular speed rotation) provided in a rotary case. However, in the gear meshing portion of the gear train, there is play due to backlash (meshing clearance), so that the movement trajectory of the planter arm becomes unstable. There was an inconvenience.

[0003]

In view of the above, there has been proposed an apparatus in which a cam is provided on a predetermined gear shaft and the cam is pressed by a brake arm to absorb backlash of the gear meshing portion. Conventionally, since the brake arm is supported by the gear shaft, there is no possibility that an unintended load acts on the gear shaft and the gear may rotate poorly, and the length and arrangement of the brake arm are limited. There was an inconvenience.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems in view of the above situation, and has an end portion of a rotary case fixed to a planting drive shaft. In addition, a planter arm for planting transplanted seedlings with the rotation of the rotary case is provided, and in a transplanter that controls the posture of the planter arm via a gear train provided in the rotary case, in the rotary case, In providing a brake arm for pressing a cam provided on a predetermined gear shaft to absorb backlash of the gear meshing portion, the brake arm fulcrum is provided at a position different from the gear shaft. In other words, it is not possible to prevent the inconvenience of the eccentric gear from causing rotation failure due to the load of the brake arm, but it is possible to easily change the length and arrangement of the brake arm and reduce the size of the rotary case. Further, the brake arm is arranged to cross the gear train, and the brake arm is urged by a brake spring arranged along the gear train. In other words, the brake arm is not allowed to be urged from a substantially orthogonal direction, but the brake spring can be housed in a compact manner and the rotary case can be reduced in size and weight. Also, a spring holding plate is arranged along a brake spring for urging the brake arm. That is, since the fall of the brake spring is regulated by the spring pressing plate, the brake arm can always be urged with an appropriate spring force.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a planting work machine connected to a rear portion of a traveling machine body 2 via a lifting link mechanism 3, and the planting work machine 1 includes a lifting link mechanism 3
, A seedling platform 5 supported by the working machine frame 4 so as to be able to reciprocate left and right, and a seedling scraping port (see FIG. (Not shown), a plurality of planter cases 7 extending rearward from the work machine frame 4, a float 8 provided below the planter case 7, and the like. Is the same as before.

Reference numeral 9 denotes a rotary case provided on one side surface or both side surfaces of the planter case 7, and a central portion of the rotary case 9 is turned to a cylindrical portion 7 a projecting from the side surface of the planter case 7. It is fitted externally movably,
Since the planting drive shaft 10 protruding from the planter case 7 is integrally connected to the outer case 9 a of the rotary case 9, the rotary case 9 rotates as the planting drive shaft 10 is driven. ing.

Reference numeral 11 denotes a sun gear provided in the center of the rotary case 9. The sun gear 11 is rotatably supported on the planting drive shaft 10.
A meshing claw 11a that meshes with the tip claw portion 7b of the cylindrical portion 7a to stop the sun gear 11 is integrally formed. The sun gear 11 includes a pair of intermediate gears 12.
Since the gears are meshed at positions shifted by 80 degrees, and the planetary gears 13 are meshed with the respective intermediate gears 12, a gear train is arranged linearly around the sun gear 11.

Reference numerals 14 and 15 denote a pair of bearings interposed between the cylindrical portion 7a and the rotary case 9.
The bush type bearing 15 disposed on the sun gear 11 side covers the meshing portion between the tip claw portion 7b and the meshing claw 11a. A predetermined gap is formed between the peripheral surface and the peripheral surface.

Reference numeral 16 denotes a planter arm provided with a planter beak 17.
It is rotatably supported at both ends of the rotary case 9 and is integrally connected to a cylindrical planter arm shaft 18 which is spline-connected to the planetary gear 13. That is, when the rotary case 9 rotates with the driving of the planting drive shaft 10, the intermediate gear 12 rotates while revolving around the sun gear 11, and the planetary gear 13 meshing with the intermediate gear 12 rotates in the reverse direction. In order to rotate, the planter arm 16 integrally connected to the planetary gear 13 revolves around the planting drive shaft 10 while rotating around the planter arm shaft 18 in the opposite direction. As a result, the planter arm 16 The posture of the seedling mounting table 5 is always the same regardless of the rotation of the rotary case 9.
Is controlled so as to face the direction of.

The sun gear 11, the intermediate gear 12, and the planetary gear 13 are all formed as eccentric gears (an elliptical gear or a non-circular gear can be used as long as it transmits unequal speed rotation). Then, the angular velocity of each eccentric gear is set such that after the planter beak 17 scrapes the seedling from the seedling mounting table 5, it reaches a planting position in the soil while drawing a circular arc swelling forward, and thereafter rises linearly. It is set so as to draw a semi-moon-shaped stationary locus (tip motion locus when the running is stopped). When one planter beak 17 scrapes the seedling from the seedling mounting table 5, at the same time, the other planter beak 17 starts planting. Since the position and the trajectory of the planter beak 17 are set to be executed, planting is performed twice each time the rotary case 9 makes one rotation.

Reference numeral 19 denotes a camshaft incorporated in the planter arm shaft 18. The base end of the camshaft 19 is integrally fixed to the inner case 9b of the rotary case 9, while the tip end is The first cam 20 facing the inside of the planter arm 16 is provided integrally. Reference numeral 21 denotes a planter fork disposed on the inner surface of the planter beak 17.
The rod 22 is integrally attached to the distal end of a rod 22 which is supported so as to be freely retractable.
3, the other end is engaged with one end of a swing arm 24 that contacts the first cam 20. In other words, at the time of the planting operation accompanying the rotation of the rotary case 9, the large diameter portion of the first cam 20 pushes the other end of the swing arm 24 at the stage when the planter beak 16 reaches the planting position, and interlocks with this. The seedling is pushed out from the planter beak 16 based on the forward operation of the planter fork 21.

Numeral 25 is a pin for swingably supporting the swing arm 24. The pin 25 is
6, it is not necessary to form a thread groove in the planter arm 16, unlike the conventional case in which a screw is used for the swing arm fulcrum, and the assembling operation can be simplified. In addition, since the engagement groove 25a which can engage a tool is formed at the base end of the pin 25,
Can be easily removed.

Reference numeral 26 denotes a swingable brake arm provided inside the rotary case 9. The brake arm 26 applies a second cam 27 spline-coupled to the planter arm shaft 18 by a biasing force of a brake spring 28. Receiving and pressing. In the process in which the pressing position of the brake arm 26 reaches the top of the second cam 27, the pressing force of the brake arm 26 is reduced because the brake arm 26 swings in the retreating direction against the urging force of the brake spring 28. Acts in the direction of braking the rotation of the arm shaft 18, while the pressing position of the brake arm 26 is
7, the brake arm 26 swings in the pressing direction by the biasing force of the brake spring 28.
The pressing force of the brake arm 26 acts in a direction for positively rotating the planter arm shaft 18.
That is, since the brake arm 26 urges the planter arm shaft 18 in the braking direction or the rotation direction in the predetermined movement locus range of the planter beak 17, the backlash (engagement play) existing in the gear meshing portion of the gear train is reduced. The movement trajectory of the planter beak 17 can be stabilized by absorption.

Reference numeral 29 denotes a brake arm support shaft serving as a swing support point of the brake arm 26. The brake arm support shaft 29 avoids the dual use of the gear shaft 30 of the intermediate gear 12, and is separate from the gear train. Position. That is, unlike the prior art in which the brake arm 26 is supported by the gear shaft 30 of the intermediate gear 12, it is not possible to prevent the inconvenience of the intermediate gear 12 and the like from causing rotation failure due to the load of the brake arm 26. The size and the size of the brake spring 28 and the rotary case 9 can be reduced by easily changing the length and arrangement of the arm 26.

The brake arm 26 is disposed between the planter arm shaft 18 and the intermediate gear shaft 30 in a direction intersecting the gear train, and a brake for urging the distal end of the brake arm 26 is provided. The spring 28
It is arranged along the gear train. That is, since the brake arm 26 can be urged from the substantially orthogonal direction without waste, the small brake spring 2 having a small spring force is used.
8 can be adopted, the fall of the brake spring 28 can be prevented, and there is no need to form an overhanging portion for accommodating the brake spring 28. Therefore, the rotary case 9 can be reduced in size and weight. Can be measured. Reference numeral 9c denotes a rib formed on the inner side surface of the rotary case 9, and the rib 9c is not allowed to support the base end of the brake spring 28, but as a reinforcing rib for reinforcing the bearing portion of the rotary case 9. Is also working.

Further, reference numeral 31 denotes a spring holding plate incorporated in the rotary case 9, and the spring holding plate 31 is positioned by the intermediate gear shaft 30, and is sandwiched between the intermediate gear 12 and the outer case 9a. Although it is assembled into the rotary case 9 in a state in which the brake spring 28 is installed, the installation position is along one side of the brake spring 28, so that it is not allowed to restrict the fall of the brake spring 28, and when the rotary case is disassembled. The protrusion of the brake spring 28 can also be restricted, and the spring holding plate 31 also functions as a spacer (gear support member) between the intermediate gear 12 and the outer case 9a. It is not possible to maintain the mesh, but the number of parts and the structure Thereby making it possible to measure the simplification.

On the other hand, flange portions 16a and 18a are formed at the base end of the planter arm 16 and the distal end of the planter arm shaft 18 so as to be overlapped with each other. (Tightening bolts) 32 and 33 are integrally fixed. At this time, the tip of the planter arm shaft 18 is fitted into the fitting hole 16b of the planter arm 16 so that the center of the planter arm 16 is fixed. It is designed to be positioned.

Reference numerals 16c and 16d denote a pair of front and rear bolt through-holes formed in the flange portion 16a of the planter arm 16. Of the bolt through-holes 16c and 16d, the front bolt through-hole 16c is located at the mounting center. On the other hand, the rear bolt through hole 16d is formed in a long hole that faces the tangential direction (vertical direction), while the rear bolt through hole 16d faces in the radial direction (front and rear direction) of the mounting center. 34 is a fixing bolt 33 on the rear side.
The cam nut 34a which is fitted into the bolt through hole 18b on the planter arm shaft 18 side is formed integrally with the eccentric nut 34, and the eccentric nut 34 is eccentric with respect to the center of the nut. Screw holes are formed. That is,
When the eccentric nut 34 is turned while the front fixing bolt 32 is loosened, the rear fixing bolt 33 is inserted into the rear bolt through hole 16d.
Since the rear end of the flange portion 16a is pushed up and down while moving in the front-back direction, the mounting angle of the planter arm 16 changes with the mounting center as a fulcrum, and the planter arm 16 is scraped based on the mounting angle change. The amount can be adjusted. In addition, since the rotation of the eccentric nut 34 is restricted by a tool during the tightening operation of the rear fixing bolt 33, there is no inconvenience that the tightening rotation center moves and the workability is deteriorated. The scraping amount can be easily adjusted only by turning and operating the eccentric nut 34 side.

The eccentric nut 34 is provided on the planter case 16 side (fixed side) of the planter arm 16, while the fixing bolt 33 is provided on the outside (adjustment side) of the planter arm 16, so that the rear side is fixed. Not only is it not possible to secure a tightening work space for the bolt 33, but also it is possible to improve the workability when adjusting the scraping amount by fixing the rotation center of the eccentric nut 34.

Thus, the distance L1 from the mounting center position to the rear fixing bolt position is set larger than the distance L2 from the mounting center position to the front fixing bolt position. In other words, when finely adjusting the scraping amount based on the mounting angle of the planter arm 16 with the planter arm shaft 18 as the mounting center, the nut of the fixing bolt 33 farthest from the mounting center is made the eccentric nut 34. Fine adjustment can be performed by reducing the amount of adjustment to the rotation angle of 34.

On the other hand, 35 and 36 are the planter beaks 1
A bolt through hole 17a of the planter beak 17 through which the upper fixing bolt 35 of the upper and lower fixing bolts 35, 36 is fixed. Although formed as a normal round hole, the bolt through hole 17b through which the lower fixing bolt 36 penetrates is formed as a long hole (flexible portion) facing in the left-right direction. That is, in a state where the fixing bolts 35 and 36 are loosened, the left and right positions of the planter beak 17 can be finely adjusted independently using the one fixing bolt 35 as a fulcrum. Compared to the conventional fine adjustment, the left and right position of the planter beak 17 cannot be easily adjusted, and the use of the fixing portion can also prevent the structure from becoming complicated. ing.

In the present embodiment, the left and right positions of the planter beak 17 are adjusted by using one of the upper and lower fixing bolts 35 and 36 for fixing the planter beak 17 to the planter arm 16 as a fulcrum. ,
There is an advantage that it can be implemented only by making one of the bolt through holes 16b long, but the upper fixing bolt 35 for fixing the upper end of the planter beak 17 serves as a fulcrum.
Since the left and right positions are adjusted, a wide adjustment range can be ensured even with a relatively short slot.

Further, flanges 17c are formed at both right and left edges of the planter beak 17 so as to have a substantially zigzag shape in plan view, and this is fitted to the front end of the planter arm 16. Between the front end of the planter arm 16 and the flange portion 17c, a gap S serving as a margin for adjusting the left and right position of the planter beak 17 is secured. That is, since the right and left position adjustment range of the planter beak 17 is set using the fitting portion between the planter beak 17 and the planter arm 16, the structure can be simplified as compared with a case where a stopper or the like is separately formed. Is available.

In the rotary case 9 described above, a brake arm 26 is provided in the rotary case 9 to press a second cam 27 provided on the planter arm shaft 18 to absorb backlash of the gear meshing portion. However, since the support shaft 29 of the brake arm 26 is provided at a different position avoiding the dual use of the gear shaft 30, the conventional brake arm 26 is supported by the gear shaft 30 of the intermediate gear 12. As shown in FIG.
However, it is not permissible to prevent the inconvenience of causing rotation failure, and it is possible to easily change the length, arrangement, and the like of the brake arm 26, and to reduce the size of the brake spring 28 and the rotary case 9.

The brake arm 26 is disposed so as to cross the gear train, and the brake arm 26 is
Since the brake arm 26 is urged by the brake spring 28 disposed along the gear train, the brake arm 26 can be urged from a substantially orthogonal direction without waste. Therefore, it is not permissible to use a small brake spring 28 having a small spring force, and it is possible to prevent the brake spring 28 from falling down.
Since there is no need to form a projecting portion for housing the rotary case 9, the rotary case 9 can be reduced in size and weight.

Further, since the spring holding plate 31 is provided along one side of the brake spring 28, it is not possible to restrict the fall of the brake spring 28, and the brake spring 28 may be protruded when the rotary case is disassembled. In this embodiment, the spring holding plate 31 is also used as a spacer interposed between the intermediate gear 12 and the outer case 9a. However, the number of parts can be reduced and the structure can be simplified based on the shared use of parts.

Further, a fixture for fixing the planter arm 16 to the flange portion 18 of the planter arm shaft 18 is constituted by using an eccentric nut 34, and the turning of the eccentric nut 34 causes the fixing of the planter arm 16. Since the scraping amount adjustment (mounting angle adjustment) is performed, the number of parts can be reduced and the structure can be simplified as compared with the case where a dedicated adjustment screw is separately provided. (Spanner) can be used to adjust the scraping amount.

Also, when tightening the fixing bolt 33,
Since the rotation of the eccentric nut 34 is regulated by a tool, there is no inconvenience that the tightening rotation center moves and the workability does not deteriorate. The amount can be easily adjusted.

The eccentric nut 34 is provided on the planter case 16 (fixed side) of the planter arm 16, while the fixing bolt 33 is provided on the outside (adjustment side) of the planter arm 16, so that the rear side is fixed. Not only is it not possible to secure a tightening work space for the bolt 33, but also it is possible to improve the workability when adjusting the scraping amount by fixing the rotation center of the eccentric nut 34.

In finely adjusting the scraping amount based on the mounting angle of the planter arm 16 with the planter arm shaft 18 as the mounting center, the nut of the fixing bolt 33 farthest from the mounting center is replaced by the eccentric nut 34. Fine adjustment can be performed by reducing the adjustment amount for the rotation angle of the eccentric nut 34, and as a result, the accuracy of the scraping amount adjustment can be improved.

Further, since the through hole 17b of the fixing bolt 36 for fixing the planter beak 17 to the planter arm 16 is formed as a long hole which allows the left and right position of the planter beak 17 to be adjusted, the left and right positions of the planter beak 17 can be finely adjusted independently. It becomes possible to adjust. Therefore, the planter arm 16
The position of the planter beak 17 can be easily adjusted as compared with the conventional method in which the entire position of the left and right is finely adjusted using a shim. , Not easy to implement,
There is an advantage that a complicated structure can be avoided.

In order to adjust the left and right position of the planter beak 17 by using one of the upper and lower fixing bolts 35, 36 for fixing the planter beak 17 to the planter arm 16, one long hole is required. It is possible to adjust the left and right position of the planter beak 17 only by forming it at the place, and as a result, it is not possible to implement the planter beak 17 easily, and it is possible to avoid a complicated structure.

Further, since a gap S is formed in the fitting portion between the planter beak 17 and the planter arm 16 so as to allow the left and right position of the planter beak 17 to be adjusted, the left and right position adjustment range of the planter beak 17 is set. The structure can be simplified as compared with the case where the stopper and the like are separately formed.

The present invention is, of course, not limited to the above-described embodiment. For example, as shown in FIG. 13, the eccentric bolt 37 is used to adjust the left and right position of the planter beak 17. Is also good. And in this case,
The upper bolt through-hole 17a is formed as a long hole pointing in the vertical direction, while the lower bolt through-hole 17b is formed as a round hole that fits into the cam portion 37a of the eccentric bolt 37.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is a side view of the planting work machine.

FIG. 3 is a side view of a main part of the same.

FIG. 4 is an internal side view of the rotary case.

FIG. 5 is a sectional view of a rotary case and a planter case.

FIG. 6 is a sectional view of a planter arm.

FIG. 7 is a sectional view showing a bearing portion of the rotary case.

FIG. 8 is an exploded perspective view of a rotary case.

FIG. 9 is a sectional view of a main part of the planter arm showing a fulcrum pin of the swing arm.

FIG. 10 is a side view of the planter arm showing a scraping amount adjustment state.

FIG. 11 is a front view of a plantervik.

FIG. 12 is a side view of the same.

FIG. 13 is a front view of a planter beak showing another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Planting work machine 9 Rotary case 10 Planting drive shaft 11 Sun gear 12 Intermediate gear 13 Planetary gear 16 Planter arm 17 Planter beak 17a, 17b Bolt through hole 18 Planter arm shaft 26 Brake arm 27 Second cam 28 Brake spring 29 Brake Arm support shaft 31 Spring holding plate 32, 33 Fixing bolt (for planter arm) 34 Eccentric nut 35, 36 Fixing bolt (for planter beak)

Claims (3)

[Claims] 1. A planter arm for planting transplanted seedlings with the rotation of the rotary case is provided at an end of the rotary case fixed to the planting drive shaft, and the posture of the planter arm is mounted on the rotary case. In a transplanter controlled through a gear train, when a brake arm for absorbing a backlash of a gear meshing portion by pressing a cam provided on a predetermined gear shaft is provided in the rotary case, An implanting machine, which is provided at a position different from a gear shaft. 2. The transplanter according to claim 1, wherein a brake arm is arranged so as to cross the gear train, and the brake arm is urged by a brake spring arranged along the gear train. . 3. The transplanter according to claim 1, wherein a spring holding plate is arranged along a brake spring for urging the brake arm.