JP2519040Y2 - Arrangement structure of conversion gear body in transplanter - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of converting gear bodies in transplanters such as rice transplanters.

[0002]

[Prior Art and Problems to be Solved by the Invention] In general,
In this seed transplanter, the planting system power output from the transmission performs planting operation of the planting nail and lateral feed of the seedling mounting table in time with this. For attachment operation, it is necessary to adjust the operating speed according to the distance between plants (planting pitch), and for lateral feeding of the seedling mounting table, adjust the lateral feeding amount according to the type of seedling. There is a need to. Therefore, conventionally, a stock-to-stock conversion gear capable of stock-to-stock conversion by exchanging gears (sprockets or gears) with different numbers of teeth in the power transmission mechanism that transmits the output power of the transmission to the planting pawl operating mechanism. While providing the body, in the power transmission mechanism that transmits the power distributed from the power transmission mechanism to the lateral feed mechanism of the seedling table, the lateral feed amount can be converted by exchanging with the gear body having different number of teeth. Although the feed amount converting gear bodies are provided, since the respective converting gear bodies are disposed separately from each other on the transmission side and the planting work side, it is necessary to cover them with individual cover bodies. Workability at the time of replacement was also a problem because the number of parts was too large and the other cover was accidentally removed.

[0003]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing an arrangement structure of a converting gear body in a transplanter capable of eliminating these drawbacks in view of the above circumstances. In the power transmission mechanism that transmits the planting system power output from the transmission to the planting claw actuating mechanism, the stock-to-stock conversion gear that allows stock-to-stock conversion by exchanging gears with different numbers of teeth While providing the body, in the power transmission mechanism that transmits the power distributed from the power transmission mechanism to the lateral feed mechanism of the seedling table, the lateral feed amount can be converted by exchanging with the gear body having different number of teeth. In a transplanter provided with a feed amount conversion gear body, the both conversion gear bodies are
It is characterized in that it is arranged at a nearby position and is covered with a cover body.

With this construction, the present invention makes it possible to reduce the number of parts and improve workability when replacing the gear body.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a walk-type rice transplanter,
The rice transplanter 1 has an engine 2 mounted in the front, and a front-low-back-high seedling mounting table 3 is provided in the rear so as to be movable left and right.
The planting claws 4 are then planted on the paddy field by scraping the planted seedlings 3 from the planting table 3 by the planting operation of the planting claws 4 in synchronism with the running of the machine body.

Reference numeral 5 denotes a transmission case which is assembled integrally with the engine 2. The transmission case 5 is formed by mating cases 5a and 5b and a cover 5c which covers side surfaces of the case 5b. , And inside, the first to fifth transmission shafts 6 facing left and right,
7, 8, 9, and 10, the engine power input by the first shaft 6 is output to the traveling system from a sprocket 8a provided at the protruding end of the third shaft 8, and the fourth shaft 9 is protruded. Power is transmitted from the engine 2 to the first shaft 6 from the sprocket 9a provided at the end to the planting system. The operation is performed by a gear 12.

Further, reference numeral 13 denotes a shifter shaft, and a tip end of the shifter shaft 13 is fitted into the transmission case 5 so as to be movable left and right, and a shifter fork 1 is attached to the tip thereof.
The shifter fork 14 is engaged with a cylindrical transmission gear 15 that is spline-fitted to the first shaft 6 and a back gear 16 that is rotatably fitted to the fifth shaft 10. The gears 15 and 16 are simultaneously operated for shifting. In the gear shift operation state corresponding to the reverse position of the gear shift lever 17, the engine power input by the first shaft 6 is constantly engaged with the tubular gear shift gear 15 and the first gear 15a of the tubular gear shift gear 15. 16, an input gear 7a of the second shaft 7 that meshes with the small-diameter gear 16a of the back gear 16, and an input gear 8b of a third shaft 8 that constantly meshes with the output gear 7b of the second shaft 7. In the gear shift operation state corresponding to the neutral position of the gear shift lever 17, the small diameter gear 16a of the back gear 16 and the input gear 7a of the second shaft 7 are disengaged from each other to transmit power. It's getting cut off. Further, the shift lever 1
In the gear shift operation state corresponding to the work traveling position of No. 7, the tubular transmission gear 15, the input gear 7a of the second shaft 7 meshed with the second gear 15b of the tubular transmission gear 15, and the output of the second shaft 7. The engine power is transmitted to the third shaft 8 via the input gear 8b of the third shaft 8 which is constantly meshed with the gear 7b, and further, in the gear shift operation state corresponding to the road running position of the gear shift lever 17, the tubular gear shift is performed. The engine power is transmitted to the third shaft 8 via the gear 15, the back gear 16 that is always meshed with the first gear 15a of the tubular transmission gear 15, and the input gear 8b of the third shaft 8 that is meshed with the back gear 16. To do. That is, "first shaft 6 →
In the reverse gear shift state through the transmission path of “fifth shaft 10 → second shaft 7 → third shaft 8”, “first shaft 6 → second shaft 7 → third shaft 8” or “first shaft 6 → fifth shaft” The third shaft 8 is adapted to rotate in the reverse direction because it goes through a speed change path that is one step larger than the forward speed change state in which the transmission path "shaft 10 → third shaft 8" is passed.
Further, in the on-road traveling shift state through the transmission path of “first shaft 6 → fifth shaft 10 → third shaft 8”, the back gear 16 is connected to the first gear 15 a of the cylindrical transmission gear 15 and the input gear of the third shaft 8. 8b, the power is transmitted to the third shaft 8 at the same time, so that the third shaft 8 is rotated at a higher speed as compared with the state of the work traveling speed change via the second shaft 7, which is a reduction shaft.

On the other hand, 9b and 9c are the fourth shaft 9 respectively.
The first inter-stock strain gear and the second inter-stock strain gear, which have different numbers of teeth, are provided in accordance with the operation of the speed change lever 17 in the work operation range. By selectively meshing the first gear 15a and the second gear 15b of the gear 15, the power transmission to the fourth shaft 9 is relayed. That is, the first inter-gear gear 9
b has a larger number of teeth than the second stock gear 9c, the number of teeth of the first gear 15a of the tubular transmission gear 15 is set to be larger than that of the second gear 15b, and at least the reverse movement of the transmission lever 17 is performed. In the speed change operation state corresponding to the position, the power transmission to the fourth shaft 9 is cut off without engaging the tubular speed change gear 15 with the inter-stock gears 9b and 9c. The first gear 15a of No. 15 meshes with the second stock gear 9c to rotate the fourth shaft 9 at a high speed, and in the second position, the first gear 15a of the tubular transmission gear 15 has the first stock gear 9b. To rotate the fourth shaft 9 at a low speed, and at the third position, the second gear 15b of the tubular transmission gear 15 meshes with the second inter-stock gear 9c to move the fourth shaft 9 at a medium speed. It is designed to rotate at And summer to be able to perform on the basis of the shift on the linear shift operation of a single shift lever 17.

A sprocket 10a, which is connected to a sprocket 9a of the fourth shaft 9 via a chain 18 in the cover 5c, is connected to one end of the fifth shaft 10 protruding from one side surface of the transmission case 5. The power input by the sprocket 10a is transmitted to the fifth shaft 10 via the planting clutch mechanism 19, and the sprocket is transmitted from the sprocket 10b provided at the other end of the fifth shaft 10. The gear is transmitted through the chain 20 toward the operating mechanism of the hook 4. That is, the planting system power output from the fourth shaft 9 passes through the power transmission mechanism of “sprocket 9a → chain 18 → sprocket 10a → planting clutch mechanism 19 → fifth shaft 10 → sprocket 10b → chain 20”. The transmission is transmitted to the operating mechanism of the planting claw 4.
By exchanging a with a sprocket having a different number of teeth, the shift range of the inter-stock shift can be changed. Reference numeral 21 denotes a tension bar which constantly urges the chain 18 whose tension changes when the sprocket 9a is replaced in the tensioning direction.

Further, 22 is a screw shaft mounted on the rear end side of the transmission case 5, and one end of the screw shaft 22 has one end.
The sprocket 22a provided at one end of the fifth shaft 10 has a sprocket 10c and a chain 23 which are integrally provided at one end of the fifth shaft 10 so as to be parallel to the sprocket 10a. It is interlocked and linked through. That is, the screw shaft 22 is driven by the power distributed from one end of the fifth shaft 10,
By replacing the sprocket 22a with a sprocket having a different number of teeth, the lateral feed amount of the seedling mounting table 3 described later can be changed. Reference numeral 24 is a tension bar for constantly urging the chain 23 whose tension changes due to replacement of the sprocket 22a in the tension direction.

Reference numeral 25 denotes a slide block which is fitted on the screw shaft 22 so as to be slidable in the left-right direction, and the slide block 25 has an axis centered by a vertical feed drive shaft 26 arranged in parallel with the screw shaft 22. While the rotation of the screw is restricted, the guide piece 25a to be installed fits in the screw groove 22b formed on the outer peripheral surface of the screw shaft 22 to reciprocate left and right as the screw shaft 22 rotates. The left and right reciprocating movements allow the seedling table 3 to be laterally fed. That is, the body frame 1
A laterally transmitting transmission shaft 27 extending from the transmission case 5 to the lower part of the seedling mounting table 3 is rotatably supported by a, and a swinging rod 28 integrally provided at a front end of the laterally transmitting transmission shaft 27 is provided. A pin 25c projecting forward from a hanging portion 25b of the slide block 25 is engaged with the long hole 28a, while a long hole 2 of a swinging rod 29 integrally provided at the rear end is provided.
The slide block 25 and the seedling mounting table 3 are linked to each other by engaging a pin 3a protruding from the rear surface of the seedling mounting table 9 with 9a. Furthermore, 30 is a slide block 25.
Bearings provided in the
Is attached to a pin 25d protruding rearward from a hanging portion 25b of the slide block 25, and is rotatably abutted on the vertical feed drive shaft 26 from above. That is, the bearing 30 is rotated by bringing the slide block 25, which tends to rotate along with the rotation of the screw shaft 22, into contact with the outer peripheral surface of the vertical feed drive shaft 26 from a direction corresponding to the rotation direction of the screw shaft 22. In addition to the regulation, the left and right reciprocal movements of the slide block 25 due to the rotation regulation are guided by rolling on the outer peripheral surface of the vertical feed drive shaft 26.

On the other hand, a ratchet wheel 31 having a pair of pawls 31a is provided at the other end of the screw shaft 22, and a drive arm 32 facing the vertical feed drive shaft 26 is also provided. Then, the ratchet wheel 31 is connected to the screw shaft 2.
The vertical feed drive shaft 26 is intermittently rotated by pushing and turning the drive arm 32 in accordance with the rotation of the shaft 2, and the vertical rotation provided on the rear surface of the seedling mounting table 3 by the intermittent rotation. The feed mechanism 33 is driven. That is, the vertical feed mechanism 33 includes a pair of upper and lower rollers 34 and the rollers 34.
It is composed of a belt 35 suspended between them, a feed lever 36 connected to the lower roller 34 through a ratchet mechanism (not shown) for restricting the reverse feed, and the like as the feed lever 36 is pushed up. When the seedling contact surface of the seedlings moves downward by a predetermined amount, the planted seedlings placed on the seedling placing table 3 are vertically fed downward, and the feed lever 36 is moved every time the seedling placing table 3 moves forward. The operating arm 3 provided below the feed lever 36 for pushing up the
Reference numeral 7 denotes a connecting arm 3 provided at the other end of a vertical feed drive shaft 26 projecting from the other side of the transmission case 5.
8 is connected via a connecting rod 39.

In the embodiment of the present invention constructed as described above, the sprocket 9a for converting between stocks and the sprocket 22a for converting the lateral feed amount are arranged in close proximity to one side of the transmission case 5. Then, it is covered by the single cover 5c. Therefore, it is not necessary to cover each of the conversion sprockets 9a and 22a with an individual cover as in the conventional case where the sprockets 9a and 22a are provided apart from each other, and the number of parts can be reduced. Since each sprocket 9a, 22a can be replaced by removing the single cover 5c, inconvenience in work such as accidentally removing the other cover as in the conventional case is eliminated and the sprocket is replaced. Workability can be improved.

Further, in the embodiment, the sprocket 22 for converting the lateral feed amount is used as the sprocket 9a for converting between stocks.
Since the transverse feed drive mechanism consisting of the screw shaft 22, the slide block 25, etc. is installed in the transmission case 5 in order to arrange it in the vicinity of, it is possible to reduce the weight of the planting work part. As a result, it is possible to improve the front-rear balance of the machine body and significantly improve the running stability and the planting accuracy.

Moreover, since the accommodation space for both sprockets 9a and 22a is formed by utilizing one side surface of the transmission case 5 and covering it with the cover 5c, there is no need to prepare a separate case body. The accommodation space can be secured and the structure can be significantly simplified.

[0016]

In summary, since the present invention is constructed as described above, it is possible to change the stock between stocks by exchanging with the gears having different numbers of teeth, and the gear capable of changing the lateral feed amount. Although each of the conversion gear bodies is provided with a body, since each conversion gear body is arranged at a nearby position and is covered with a cover body, like the one in which each conversion gear body is arranged separately, It is not necessary to cover each conversion gear body with each individual cover body. Therefore, it is possible to reduce the number of parts, or it is possible to replace each conversion gear body by removing one cover body, so it is possible to remove the other cover body by mistake. Inconvenience can be eliminated and workability at the time of gear body replacement can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a rice transplanter with a partial cross section.

FIG. 2 is a plan view of a rice transplanter.

FIG. 3 is a side view of a transmission case.

FIG. 4 is an exploded perspective view of a transmission case.

FIG. 5 is a longitudinal sectional view of a transmission front part with a part developed.

FIG. 6 is a longitudinal sectional view of a rear part of the transmission, in which a part is developed.

FIG. 7 is an exploded perspective view showing a main part of a horizontal feed mechanism and a vertical feed mechanism.

[Explanation of symbols]

 1 traveling machine 3 seedling mounting table 5 transmission case 5c cover 9a sprocket for conversion between stocks 22 screw shaft 22a sprocket for lateral feed amount conversion

Claims (1)

(57) [Scope of utility model registration request] 1. A stock-to-stock conversion capable of stock-to-stock conversion by exchanging with a gear body having a different number of teeth in a power transmission mechanism for transmitting planting system power output from a transmission to a planting pawl actuating mechanism. While the gear body is provided, the lateral feed amount can be converted by exchanging with the gear body with different number of teeth in the power transmission mechanism that transmits the power distributed from the power transmission mechanism to the lateral feed mechanism of the seedling mounting table. In a transplanter provided with a lateral feed amount conversion gear body, the conversion gear body disposition structure in the transplanter, characterized in that the both conversion gear bodies are arranged in the vicinity positions and covered with a cover body. .