JP4485974B2 - Transplanter - Google Patents

Description

  The present invention relates to a transmission shaft coupling structure of a planting transmission case in a transplanting machine such as a riding type rice transplanter, in which a plurality of them are arranged in parallel in the left-right direction of the machine body.

  Conventionally, in transplanters such as riding type rice transplanters capable of multi-row planting, a plurality of planting transmission cases (planter cases) are juxtaposed at predetermined intervals in the left-right direction of the aircraft, and these planting Among the transmission cases, when the planting transmission case on the left and right end sides is configured to be folded in a position above or behind the stationary planting transmission case on the center side, the outer side of the stationary planting transmission case A lateral feed transmission case with a speed change mechanism for operating the seedling platform lateral feed mechanism is arranged on the inner side, and the power of the planting transmission shaft (transplanting drive shaft) passes through the lateral feed transmission case and is movable. In the state where the movable planting transmission case is housed in a state in which it is transmitted, a configuration is known in which the shifting operation of the lateral feed transmission case can be easily performed from the outside of the transplanter (for example, Patent Document 1). reference.).

And since the transplanter transmits the power of the planting transmission shaft to the movable planting transmission case through the lateral feed transmission case, the power can be transmitted to the lateral feed transmission case without providing a counter shaft. In addition, the lateral feed speed change case can be used also as a support member for the planting transmission shaft, and as a result, the number of parts can be reduced and the structure can be simplified to reduce the weight. . Further, in this state, in the state in which the movable planting transmission case is deployed, the lateral feed transmission case is located on the center side of the airframe, so that the right and left balance can be maintained well.
JP 2001-61312 A (page 4-5, FIG. 20 to FIG. 22)

  However, in order to arrange a laterally-fed transmission case between predetermined planting transmission cases inside the aircraft in order to improve the left-right balance, the input or output unit of both planting transmission cases and the output of the laterally-fed transmission case The connecting shaft that connects the transmission part or the input part must be made short, and the misalignment between the axis of the transmission shaft and the connecting shaft cannot be sufficiently absorbed by the short connecting shaft. A load is applied to the transmission mechanism in the attached transmission case and the lateral feed transmission case, and in particular, there is a possibility that the connecting portion between the lateral feed transmission shaft (transmission shaft) and the output side connection shaft in the lateral feed transmission case is damaged.

  Therefore, in order to prevent damage to the connecting portion between the transverse feed transmission shaft and the output side connecting shaft, if the connecting portion is intentionally provided with transmission backlash, the planting mechanism located on the lower side of the transmission When the operation timing is delayed and the sparse planting that rotates the drive shaft of the planting mechanism, which has been attempted in recent years, is adopted, the desired sparse planting performance cannot be obtained. Had.

  The present invention aims to solve the above-described problems, and includes a plurality of transplanting rods that scrape seedlings from a seedling platform that reciprocates left and right by a seedling platform lateral feed device and transplant the seedlings to a field. Planting transmission cases are installed side by side in the left and right direction of the aircraft, and the power is transmitted in series by connecting the input part and output part projecting from the adjacent planting transmission case via the transmission shaft. In the transplanter, a lateral feed transmission case having a transmission mechanism for operating the seedling table lateral feed device is disposed between the predetermined planting transmission cases, and the predetermined transmission via the transmission shaft in the lateral feed transmission case. When performing transmission between the planting transmission case, the input unit of the lateral feed transmission case and the output unit of the planting transmission case, or the output unit of the lateral feed transmission case and the input unit of the planting transmission case, or , Transverse transmission case input section and planting transmission case And an output unit, and an input unit of the output unit and the planting transmission case of lateral feeding transmission case, and the first, characterized in that are linked through an Oldham coupling.

  Then, transmission is performed between the predetermined planting transmission cases via a transmission shaft having a keyway in the lateral feed transmission case, and the transmission shaft is either one of an input unit or an output unit of the lateral feed transmission case. A second feature is that the transmission shaft and the shaft having either the input portion or the output portion of the lateral feed transmission case are connected in the lateral feed speed change case.

  According to the first aspect of the present invention, a plurality of planting transmission cases provided with transplanting cages for scraping seedlings from a seedling platform that reciprocates left and right by a seedling platform lateral feed device and transplanting the seedlings in a field are provided in the left-right direction of the machine body A predetermined planting transmission case in a transplanter that is arranged in parallel with a certain interval and connects the input unit and output unit projecting from adjacent planting transmission cases via a transmission shaft to transmit power in series. In order to perform transmission between the predetermined planting transmission case via a transmission shaft in the lateral feed transmission case, a lateral feed transmission case having a speed change mechanism for operating the seedling table lateral feed device is disposed therebetween. Transverse transmission case input section and planting transmission case output section, or lateral feed transmission case output section and planting transmission case input section, or lateral feed transmission case input section and planting The output of the transmission case and the By connecting the force part and the input part of the planting transmission case via an Oldham coupling, the output part of the planting transmission case on the upper side of the transmission and the input part of the lateral feed transmission case 38 and / or the lateral While absorbing the axial misalignment at the connecting part between the output part of the feed transmission case and the input part of the planting transmission case on the lower transmission side, the Oldham coupling is used to absorb the shift of the shaft center. Power can be transmitted without causing a delay in the operation timing, especially when the rice transplanter, which is a transplanting machine, adopts sparse planting that rotates the drive shaft of the transplanting rod at an infinite speed, It is very effective because stable sparse planting performance can be obtained.

  According to the second aspect of the present invention, transmission between the predetermined planting transmission cases is performed via a transmission shaft provided with a keyway in the lateral feed transmission case, and the transmission shaft is connected to the lateral feed transmission case. By connecting the speed change shaft and the shaft having either the input part or the output part of the transverse feed case in the transverse feed case, the shaft having either the input part or the output part. In addition, a compact and inexpensive lateral feed transmission mechanism can be formed in the transverse feed transmission case, and the breakage of the connecting portion due to the misalignment of the shaft centers of both transmission shafts can be prevented.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a riding type rice transplanter 10 which is an example of a transplanting machine, and an eight-row planting device 12 is connected to a link mechanism 13 at the rear portion of a body frame (not shown) of the riding type rice transplanter 10. Equipped to be able to move up and down through. The planting device 12 includes a seedling stage 14 on which mat seedlings are placed and reciprocally moved back and forth by rotation of a seedling stage horizontal feed shaft 65 (see FIG. 3) in an inclined posture of a front, rear, and rear shape. ing.

  Further, as shown in FIGS. 2 and 3, a square pipe-shaped planting frame 21 is horizontally provided in the lower part of the planting device 12 in the left-right direction of the machine body, and the link mechanism 13 is attached to the planting frame 21. The rolling holder (not shown) that constitutes the structure is supported so as to be capable of rolling, and four planting transmission cases 22a, 22b, 22c, and 22d are arranged side by side at a constant interval in the left-right direction of the machine body. The planting power is transmitted to the planting mechanism 24,... Provided with the transplant rod 23 through a chain transmission mechanism (not shown) incorporated in the transmission cases 22a, 22b, 22c, and 22d. .

  More specifically, the planting power output from the planting PTO shaft 25 on the mission case side (not shown) is input to the input case 27 which is a branch transmission unit via the universal joint 26 and via the bevel gears B1 and B2. The power is transmitted to the output shaft 28 protruding from the input case 27 and branched right and left.

  And the planting power to the adjacent planting transmission cases 22b and 22a juxtaposed on the left side of the input case 27 includes the left end of the output shaft 28 protruding from the input case 27 and the planting transmission case 22b on the left side of the input case 27. A transmission shaft (tube shaft) 32 is connected to the right end of the transmission shaft 31 that is an input portion protruding from the left end of the transmission shaft 31 that is an output portion, and the planting adjacent to the left side of the planting transmission case 22b. A planting transmission case that is connected to the right end of a transmission shaft 33 that is an input portion that protrudes from the transmission case 22a via a transmission shaft (tube shaft) 34, thereby being arranged in parallel on the left side of the input case 27. The planting power to 22b, 22a is the planting transmission case 22a via the output shaft 28 projecting from the input case 27, the coupling shaft 32, the transmission shaft 31 projecting from the planting transmission case 22b, and the coupling shaft 34. It is adapted to be transmitted to the transmission shaft 33 which projects to the right.

  On the other hand, between the adjacent planting transmission cases 22 c and 22 d arranged side by side on the right side of the input case 27, the transplantation rod 23 in the lateral reciprocation stroke of the seedling platform 14, that is, in the one-side feed stroke of the seedling platform 14. A lateral feed speed change case 38 having a speed change mechanism for operating the seedling stand horizontal feed device 37 capable of changing the number of times of seedling scraping is disposed, and these planting transmission cases 22c and 22d and the lateral feed speed change are hereinafter described. A transmission form of planting power to the case 38 will be described.

  First, the right end of the output shaft 28 protruding from the input case 27 and the left end of the transmission shaft 41 which is an input portion protruding from the planting transmission case 22c adjacent to the right side of the input case 27 are connected via a transmission shaft (tube shaft) 42. In addition, an engagement flange 43 is fixed (fitted) to the right end of the transmission shaft 41 as an output portion, and the engagement flange 43, the floating cam 44, and an input portion protruding from the lateral feed transmission case 38 A known Oldham coupling C1 is constituted by an engagement flange 46 fixed to the left end of a certain input side transmission shaft 45, and both transmission shafts 41, 45 are connected via the Oldham coupling C1.

  The input-side transmission shaft 45 also serves as a transmission shaft provided with a key groove 45a for sliding the slide key 47 for speed change operation. That is, a single shaft member (input-side transmission shaft 45) serves as a power input shaft to the lateral transmission case 38 and a power take-out shaft to the planting transmission case 22d, and a shaft is provided at the right end of the input-side transmission shaft 45. A concave groove 45b is formed in the direction. Furthermore, an output side transmission shaft 48 provided with a convex portion 48a fitted in the concave groove 45b at the left end and an engagement flange 49 fixed (fitted) at the right end is provided. Further, the input side transmission shaft 45 is provided. A portion K in which the convex portion 48 a of the output side transmission shaft 48 is fitted into the concave groove 45 b is supported in the lateral feed transmission case 38 via a ball bearing 51 fitted in the lateral feed transmission case 38.

The engaging flange 49, the floating cam 52, and the planting transmission case 22d
An Oldham coupling C2 similar to the Oldham coupling C1 described above is constituted by an engagement flange 55 fixed to the left end of a transmission shaft (tube shaft) 54 connected to the left end of the transmission shaft 53 as a projecting input portion, The output-side transmission shaft 48 and the transmission shaft 54 which are output portions protruding from the lateral feed transmission case 38 are connected via the Oldham coupling C1.

  That is, the planting power to the adjacent planting transmission cases 22c and 22d arranged side by side on the right side of the input case 27 projects to the right side from the output shaft 28, the connecting shaft 42, and the planting transmission case 22c projecting from the input case 27. From the planting transmission case 22d via the transmission shaft 41, the Oldham coupling C1, the input transmission shaft 45 of the lateral feed transmission case 38, the output transmission shaft 48, the Oldham coupling C2, and the connecting shaft 54, which are the output parts to be transmitted. It is transmitted to a transmission shaft 53 that is an input portion protruding to the left.

  On the other hand, the above-described lateral feed transmission case 38 has a plurality of drive-side transmission gears 61 that are rotatably arranged in parallel on the outer periphery of the input-side transmission shaft 45, and these drive-side transmission gears 61 are selectively linked to the input-side transmission shaft 45. A shift sleeve 62 to be connected, a plurality of driven side transmission gears 63 that are always meshed with the respective drive side transmission gears 61, an intermediate shaft 64 that integrally arranges these driven side transmission gears 63, and rotation of the intermediate shaft 64. A transmission gear 66 that is transmitted to a seedling table lateral feed shaft (spiral shaft) 65, a slide shaft 68 that is integrally connected to the speed change sleeve 62 via a connection plate 67, and a positioning that holds the slide shaft 68 at each speed change operation position. A lateral feed speed change lever (not shown) for sliding the ball 69 and the slide shaft 68 is provided.

  The power input to the input side transmission shaft 45 is generated between the driving side transmission gear 61 selected by the shifting operation of the lateral feed transmission lever and the driven side transmission gear 63 that is always meshed with the driving side transmission gear 61. Is transmitted to the seedling table lateral feed shaft 65 via the intermediate shaft 64 and the transmission gear 66. Based on the speed change operation of the lateral feed speed change lever, It is possible to change the number of times the seedlings are scraped off in the left-right reciprocating stroke, that is, in one horizontal feeding stroke.

  As described above, a plurality of planting transmission cases 22 a, 22 b, 22 c including a transplanting basket 23 that scrapes seedlings from the seedling platform 14 that reciprocates left and right by the seedling platform lateral feed device 37 and transplants the seedlings to the field. In a transplanter in which 22d is arranged in parallel in the left-right direction of the machine body, and an input unit and an output unit projecting from adjacent planting transmission cases are connected via a transmission shaft to transmit power in series. A lateral feed transmission case 38 having a transmission mechanism for operating the seedling table lateral feed device 37 is disposed between predetermined planting transmission cases, that is, planting transmission cases 22c and 22d arranged in parallel on the right side of the input case 27. Thus, when performing transmission between the predetermined planting transmission cases 22c and 22d via the transmission shafts 45 and 48 in the lateral feed transmission case 38, the input portion of the lateral feed transmission case 38 and the output of the planting transmission case 22c are output. Part Alternatively, the output portion of the lateral feed transmission case 38 and the input portion 22d of the planting transmission case, or the input portion of the lateral feed transmission case 38 and the output portion of the planting transmission case 22c, and the lateral feed shift case. The output portion of the planting transmission case 22d and the input portion of the planting transmission case 22d are connected via Oldham couplings C1 and C2, so that the output portion of the planting transmission case 22c on the upper transmission side and the input of the lateral feed transmission case 38 are connected. And / or the Oldham coupling C1 and C2 while absorbing the axial misalignment in the connecting portion between the output portion of the lateral feed transmission case 38 and the input portion of the planting transmission case 22d on the lower transmission side. Power can be transmitted without causing a delay in the operation timing of the graft rod 23 located on the lower transmission side of the couplings C1 and C2, and in particular, the drive shaft of the graft rod 23 is unequal. If riding rice transplanter 10 UtoShoku planting rotating a transplanter is employed is very effective because it is possible to obtain a stable UtoShoku performance.

  In other words, in order to improve the left-right balance of the planting device 12, if the laterally-feeding transmission case 38 is arranged between the predetermined planting transmission cases 22c and 22d on the inner side of the machine body, the planting transmission case 22c on the upper transmission side is arranged. The transmission shafts 45 and 48 in the laterally-fed transmission case 38 inevitably connected to the transmission shaft 41 which is an input portion projecting from the transmission shaft 53 and the transmission shaft 53 which is an output portion projecting from the planting transmission case 22d on the lower transmission side Although the displacement of the shaft center between the transmission shafts 41, 53, 45, and 48 increases, Oldham is used as a joint (connecting) means for the transmission shafts 41, 53, 45, and 48. By interposing the couplings C 1 and C 2, it is possible to absorb axial misalignment between the transmission shafts 41, 53, 45, and 48, and in particular, the drive shaft 71 of the planting rod 23 is rotated at a nonuniform speed. Sparse planting If use type planting machine 10 is employed, it is possible to obtain stable UtoShoku performance.

  The input side transmission shaft 45 of the lateral feed transmission case 38 also serves as a transmission shaft provided with a key groove 45a, and the input side transmission shaft 45 and the output side transmission shaft 48 are connected in the lateral feed transmission case 38. As a result, a compact and inexpensive lateral feed transmission mechanism can be configured in the transverse feed transmission case 38, and damage to the connecting portion due to misalignment between the input side transmission shaft 45 and the output side transmission shaft 48 is prevented. Will be able to.

The top view of a riding type rice transplanter. The top view which shows arrangement | positioning of a planting transmission case and a transverse feed transmission case. Sectional drawing of a transverse feed transmission case. AA sectional drawing in FIG.

Explanation of symbols

14 Seedling stand 22a Planting transmission case 22b Planting transmission case 22c Planting transmission case 22d Planting transmission case 23 Transplanting rod 37 Seedling table lateral feed device 38 Lateral feed speed change case 45 Transmission shaft 45a Keyway 48 Transmission shaft C1 Oldham Coupling C2 Oldham coupling

Claims (2)

  A plurality of planting transmission cases (22a, 22b, 22c) provided with transplanting rods (23) for scraping seedlings from a seedling mounting table (14) reciprocating left and right by a seedling table lateral feed device (37) and transplanting the seedlings to a field. , 22d) are arranged in parallel in the left-right direction of the airframe, and the input part and the output part protruding from the adjacent planting transmission case are connected via a transmission shaft to transmit power in series. In the machine, a lateral feed transmission case (38) having a transmission mechanism for operating the seedling table lateral feed device (37) is arranged between predetermined planting transmission cases (22c, 22d), and a lateral feed shift case ( 38) When performing transmission between the predetermined planting transmission cases (22c, 22d) via the transmission shafts (45, 48) in the horizontal transmission speed change case (38), the input section of the lateral feed transmission case (38) and the planting transmission case (22c) ) Output section or lateral feed shift cable (38) The output part and the input part of the planting transmission case (22d), or the input part of the lateral feed transmission case (38) and the output part of the planting transmission case (22c), and the lateral feed speed change. The transplanter characterized by connecting the output part of case (38) and the input part of planting transmission case (22d) via Oldham coupling (C1, C2).   Transmission between the predetermined planting transmission cases (22c, 22d) is performed via a transmission shaft (45) having a keyway (45a) in the lateral feed transmission case (38), and the transmission shaft (45) The shaft has either an input portion or an output portion of the lateral feed transmission case (38), and either the input portion or the output portion of the shift shaft (45) and the lateral feed speed change case (38). 2. A transplanter according to claim 1, characterized in that a shaft (48) having a shaft is connected in a transverse feed case (38).

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