JP4874776B2 - Rice transplanter - Google Patents

Description

  The present invention relates to a rice transplanter provided with a seedling planting device having a seedling stand and a planting claw, and more specifically, either a rear wheel or a traveling crawler is compatible with a traveling machine body connecting the seedling planting device. The present invention relates to a traveling device for a rice transplanter that can be equipped.

  Conventionally, in semi-crawler type riding rice transplanters that support the traveling vehicle body by the left and right front wheels and the left and right traveling crawlers, a front axle case is arranged at the front of the traveling vehicle body, and the front axle case is used for steering. Supports the left and right front wheels. Further, a rear axle case is disposed at the rear part of the traveling machine body, and the left and right traveling crawlers for propulsion are supported on the rear axle case (see, for example, Patent Document 1).

In this case, in the conventional rice transplanter, the crawler support frame is rotatably fitted on the rear axle protruding from the rear axle case, the track frame is attached to the crawler support frame, and the traveling crawler is supported on the track frame. It was. Therefore, the traveling crawler turned around the rear axle and moved following the unevenness in the front-rear direction of the cultivator. Moreover, the structure of the semi-crawler type tractor (for example, refer to Patent Document 2) in which a traveling crawler is provided on a traveling machine body that is formed to arrange rear wheels is also known.
JP 2003-23819 A JP 2000-264265 A

  In the prior art, it is necessary to assemble a track frame to the traveling machine body together with a mechanism for limiting the rotation range around the rear axle of the traveling crawler. For this reason, a traveling crawler can be used in place of the rear wheel for a traveling body that does not have a mechanism for limiting the rotation range around the rear axle, in other words, a rice transplanter traveling body equipped with a rear wheel. Cannot be placed. That is, when composing a rice transplanter equipped with a traveling crawler, a special traveling machine body or a rear axle case for installing the traveling crawler is required. Therefore, there is a problem that a semi-crawler type rice transplanter equipped with a traveling crawler and a wheel type rice transplanter equipped with a rear wheel cannot be configured using a traveling machine body and a rear axle case having the same structure.

  An object of the present invention is to make a rice transplanter configured so that either a semi-crawler type specification equipped with a traveling crawler or a wheel type specification equipped with a rear wheel can be configured using a traveling machine body and a rear axle case having the same structure. The machine is provided.

In order to achieve the above object, a rice transplanter according to a first aspect of the present invention is configured to connect a seedling planting device to a traveling machine body equipped with an engine so as to be movable up and down, and to a front wheel via a front axle case at a front portion of the traveling machine body. The rear axle case is arranged at the rear part of the traveling machine body, the case lid body is detachably fastened to the left and right side surfaces of the rear axle case, and the case lid body is attached to and detached from the left and right side surfaces of the rear axle case. A frame support portion for attaching a track frame for supporting a traveling crawler to the case lid body, the rear axle supporting the rear wheel projecting from the rear axle case toward the outer side of the case lid body. the integrally formed to protrude downward from the case lid, said frame supporting portion, is protruded upward from the track frame It is obtained by adapted to fasten the upper end side of the roller supporting frame removably.

According to a second aspect of the present invention, in the rice transplanter according to the first aspect, the upper and lower side edges of the case lid are extended in the vertical direction, and the pair of upper and lower sides are placed on the upper and lower ends of the case lid. The frame support portions are integrally formed.

According to the first aspect of the present invention, the seedling planting device is connected to the traveling machine body on which the engine is mounted so that the seedling planting apparatus can be moved up and down, front wheels are disposed on the front part of the traveling machine body via a front axle case, In a rice transplanter having a rear axle case arranged at the rear, a case lid is detachably fastened to the left and right side surfaces of the rear axle case, and a rear wheel support rear is directed from the rear axle case toward the outside of the case lid. projecting axle, the case lid, the frame support portion for mounting the track frame of the traveling crawler support, the integrally formed so as to protrude from the case lid downwards, the frame supporting portion, wherein since those configured to conclude a top end side of the crawler support frame which projects upwards from the track frame detachably, before the same structure Using the rear axle case and the case lid, the traveling and specifications of semi-crawler type equipped with a crawler, can easily configure and specifications of wheel type equipped with a rear wheel. That is, not only at the manufacturing factory but also at a repairable store or the like, the wheel type specification can be easily changed to the semi-crawler type specification. Conversely, it can be easily changed from a semi-crawler type specification to a wheel type specification. Therefore, it is not necessary to manufacture the traveling machine body and the like separately in the wheel type specification and the semi-crawler type specification in the manufacturing factory. In addition, it is possible to easily change from a normal wheel type to a special semi-crawler type suitable for wet fields. It is possible to reduce the inventory risk of semi-crawler type specifications with little demand at dealers.

In addition, since the upper end side of the crawler support frame protruding upward from the track frame is detachably fastened to the frame support portion protruding downward from the case lid, an operator Attach the track frame to the rear axle case by tightening or loosening the bolts from the outside of the traveling machine body (track frame) and attaching or removing the crawler support frame (or attaching / detaching the case lid) Can be removed. In other words, the wheel type specification or the semi-crawler type specification can be easily changed by a simple disassembly and assembly work from the outside of the machine.

According to the invention of claim 2 , the upper and lower side edges of the case lid are extended in the vertical direction, and the pair of upper and lower frame support portions are integrally formed on the upper and lower ends of the case lid, respectively. Since it is formed, the left and right track frames can be easily connected to the left and right case lids by properly using the upper and lower frame support portions of the case lid disposed on the left and right side surfaces of the rear axle case. That is, the left and right case lids whose left and right side support postures of the rear axle case are turned upside down are interposed between the pair of upper and lower frame support portions via the frame support portion on the side protruding downward. The left and right track frames can be connected to each other. Therefore, the left and right traveling crawlers can be easily arranged on both the left and right sides of the rear axle case by using the left and right case lids having the same structure respectively fastened to the left and right side surfaces of the rear axle case. The parts such as the case lid can be manufactured at low cost, and the parts such as the case lid can be easily managed in an assembly factory or the like.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings when an embodiment of the present invention is applied to a four-row planting type rice transplanter will be described. 1 is a side view of a riding type rice transplanter, FIG. 2 is a plan view thereof, FIG. 3 is a plan view showing a traveling machine body and a traveling crawler, FIG. 4 is a side view of the rear part of the traveling machine body, and FIG. 6 is a perspective view showing the traveling machine body and the traveling crawler, FIG. 7 is a side view showing the mounting portion of the traveling crawler, FIG. 8 is a perspective view showing the mounting portion of the traveling crawler, and FIG. 9 is the mounting of the traveling crawler and rear wheels. It is a side view which shows an aspect.

  As shown in FIGS. 1 and 2, the traveling machine body 2 in the riding type rice transplanter 1 is supported by a pair of left and right traveling crawlers 4 as well as a pair of left and right front wheels 3. An engine 5 is mounted on the front portion of the traveling machine body 2, and the power from the engine 5 is transmitted to the rear transmission case 6, and the front wheel 3 and the traveling crawler 4 are driven so as to travel forward and backward. Has been. A front axle case 7 projects from the left and right sides of the transmission case 6, and the front wheels 3 are disposed on the front axle case 7 so as to be steerable. A portal frame 8 protrudes behind the transmission case 6, one rear axle case 9 is fixed on the rear end side of the portal frame 8, and a pair of left and right traveling crawlers 4 are disposed on the rear axle case 9. That is, the power from the engine 5 is transmitted to the rear axle case 9 from the traveling drive shaft 6a protruding rearward of the transmission case 6, and the traveling crawler 4 is driven by the traveling driving force output from the rear axle case 9. Become. The traveling machine body 2 includes a mission case 6, a front axle case 7, a portal frame 8, and a rear axle case 9. The front end side and the rear end side of the portal frame 8 are fastened to the transmission case 6 and the rear axle case 9 with bolts, respectively.

  As shown in FIG. 1 to FIG. 4 and FIG. 6, a work step (body cover) 10 for boarding an operator is arranged on the upper surface side of the front part and the central part of the traveling machine body 2 via a step frame 10a. ing. A front bonnet 11 is disposed above the front part of the work step 10, and the engine 5 is covered with the front bonnet 11. A travel speed change pedal 12 for stepping operation is arranged on the upper surface of the work step 10 on the side of the rear part of the front bonnet 11.

  Further, a steering handle 14, a traveling main transmission lever 15, and a traveling auxiliary transmission lever 16 for turning on and off the main clutch protrude above the driving operation column 13 above the front bonnet 11. On the upper surface of the work step 10 behind the front bonnet 11, a control seat 18 is installed via a seat frame 17 attached to the upper end side of the link frame 19.

  As shown in FIGS. 3 to 5, a link frame 19 is erected on the rear axle case 9 at the rear end of the traveling machine body 2. A seedling planting device 23 for four-row planting is connected to the link frame 19 through a parallel three-point link mechanism 20 including a lower link 20a and a top link 20b so as to be movable up and down. In addition, the raising / lowering operation lever 22 which drives the hydraulic raising / lowering cylinder 21 for raising / lowering the seedling planting apparatus 23 is arrange | positioned under the one side of the steering handle 14 (refer FIG. 2). An operator gets on the upper surface of the work step 10 from the side getting-on / off step 25, moves in the field by the operation of the operator, and executes a rice planting operation for planting seedlings in the field by the seedling planting device 23. Become.

  As shown in FIG. 1 and FIG. 2, the seedling planting device 23 includes a planting input case 26 that transmits power from the engine 5, and two sets of four items (one set of two items) connected to the planting input case 26. Planting transmission cases 27, four-row seedling planting mechanisms 28 provided on the rear end side of each planting transmission case 27, four-row planting seedling mounts 29, and each planting transmission case 27 A center float 32a and a left and right side float 32b for leveling the 4th strip surface are provided below. The seedling planting mechanism 28 is provided with a rotary case 31 having two planting claws 30 for one strip. Two planted rotary cases 31 are arranged in the planting transmission case 27.

  That is, the power from the engine 5 is transmitted to the planting input case 26 via the PTO shaft 26a protruding rearward from the mission case 6, and the rotary case is driven by the planting driving force from the planting input case 26. 31 rotates continuously in one direction. By one rotation of the rotary case 31, two seedlings are planted on the field leveled by the floats 32a and 32b by the two planting claws 30 for one line. Further, left and right spare seedling platforms 24 are provided on the left and right sides of the front bonnet 11 with the operation step 10 interposed therebetween. During the rice planting operation, the seedling planting device 23 is supplied by an operator with a seedling mat on the spare seedling mounting table 24.

Next, with reference to FIG. 3 thru | or FIG. 8, the attachment structure of the traveling crawler 4 is demonstrated. As shown in FIGS. 4 to 7, the left and right case lid bodies 33 are detachably fastened to the left and right outer surfaces of the rear axle case 9 via a plurality of bolts 33a. A final gear group 34 for speed reduction is provided in the left and right sides of the rear axle case 9 closed by the case lid 33. A rear axle 36 that protrudes from the rear axle case 9 to the outside of the case lid 33 is connected to the rear wheel drive shaft 35 connected to the travel drive shaft 6 a via a final gear group 34. A drive sprocket 38 for driving the traveling crawler 4 is detachably fixed to the rear axle 36. The driving force from the engine 5 is transmitted to the traveling crawler 4 via the driving sprocket 38. A step frame 10 a is fastened to the front end side of the rear axle case 9 with a bolt 37.

  As shown in FIGS. 7 and 8, a square cylinder-shaped crawler support frame 42 whose upper surface side is open is integrally provided in the middle of the front-rear width of the upper surface of the track frame 40. The lower end of the crawler support frame 42 is fixed to the upper surface of the track frame 40 by welding. A pair of upper and lower frame support portions 41 for attaching the track frame 40 are integrally extended to upper and lower side ends of the case lid 33. In other words, the pair of upper and lower frame support portions 41 are integrally formed on the case lid 33 by extending the upper and lower side edges of the case lid 33 in the vertical direction. The frame support portion 41 is formed with an attachment hole 41a for penetrating the bolt 42a.

  As shown in FIG. 7 and FIG. 8, the left and right traveling crawlers 4 with endless crawler belt shape are connected via a drive sprocket 38 detachably fixed to the rear axle 36 and a track frame 40 with a square pipe shape long in the front-rear direction. Are disposed on the left and right sides of the rear portion of the traveling machine body 2. A tension roller 45 is disposed on the front end side of the track frame 40 through a tension adjustment bolt 45a so that the position of the tension roller 45 can be adjusted in the front-rear direction. A rear roller 46 is rotatably disposed on the rear end side of the track frame 40. A pair of rolling wheels 47 and a bowl-like body 48 are arranged on the lower surface side in the middle of the front and rear width of the track frame 40 via a bearing body 49. That is, the traveling crawler 4 is tensioned to the track frame 40 in a triangular shape when viewed from the side through the drive sprocket 38, the tension roller 45, and the rear roller 46, and the traveling crawler 4 at the bottom of the triangular shape when viewed from the side is paired with a pair of rollers 47. And the hook-like body 48 support the ground.

  The case lid 33 and the pair of upper and lower frame support portions 41 are configured to bisect the case lid 33 vertically by a straight line connecting the center of the rear wheel drive shaft 35 and the center of the rear axle 36. It is formed in a vertically symmetrical shape around a straight line. A plurality of mounting holes 41a are formed at positions that are vertically symmetrical about the straight line, and the same number of bolts 42a as the mounting holes 41a are disposed at positions that are vertically symmetrical about the straight line. That is, the bolt 42a is attached to the left and right case cover bodies 33 whose left and right side support postures of the rear axle case 9 are upside down, and the frame support portion 41 on the side of the pair of upper and lower frame support portions 41 that protrudes downward. Thus, the crawler support frame 42 is detachably fastened.

  Accordingly, the frame support portion 41 on the side protruding downward is inserted into the rectangular cylindrical inner hole of the crawler support frame 42 so that the frame support portion 41 on the side protruding downward is detachably inserted from above. The crawler support frame 42 is fastened by a bolt 42a so as to be detachable. On the left and right side surfaces of the rear axle case 9, a case lid 33 is disposed so that the crawler support frame 42 can be fastened to the downward frame support portion 41 of the upward and downward frame support portions 41. The left and right track frames 40 are connected to the lower end sides of the left and right case lids 33 via the downward (downward) frame support portions 41. The left and right case lids 33 for arranging the left and right traveling crawlers 4 (track frame 40) are formed in the same shape by casting using an aluminum alloy as a main material.

  The case lid 33 forms a part of the rear axle case 9. That is, the rear axle case 9 is divided into a case lid 33 as an outer case body and a rear axle case 9 body as an inner case body, and a crawler support frame 42 as an intermediate support member (a cross-sectional plate). The left and right traveling crawlers 4 are supported by the left and right case lid bodies 33 via the. Further, the operation of detaching the crawler support frame 42 from the case lid 33 (or the operation of detaching the case lid 33 from the rear axle case 9) or the like is performed on the outer side of the machine (the traveling machine body 2 or the track frame 40). It will be executed by the operator who is located.

  With the above configuration, as shown in FIG. 9, instead of the left and right traveling crawlers 4, left and right rear wheels 50 with paddy lugs can be provided on both the left and right sides of the rear part of the traveling machine body 2. When the rear wheel 50 is equipped on the traveling machine body 2 provided with the traveling crawler 4, first, the tension adjusting bolt 45 a is loosened to remove the traveling crawler 4 from the track frame 40, and the driving sprocket 38 is removed from the rear axle 36. Next, the bolt 42 a is removed, the crawler support frame 42 is detached from the frame support portion 41, and the track frame 40 is removed from the case lid 33. Thereafter, the boss portion of the rear wheel 50 is fitted on the rear axle 36 protruding from the case lid 33, the rear wheel 50 is attached to the rear axle 36, and the operation of assembling the rear wheel 50 to the traveling machine body 2 is completed. .

  On the other hand, as shown in FIG. 4, instead of the left and right rear wheels 50 with paddy lugs, left and right traveling crawlers 4 can be provided on the left and right sides of the rear part of the traveling machine body 2. When the traveling crawler 4 is equipped on the traveling machine body 2 provided with the rear wheels 50, first, the rear wheels 50 are removed from the rear axle 36. Next, the crawler support frame 42 is fastened to the frame support portion 41 via the bolts 42 a, and the track frame 40 is connected to the case lid 33. The boss portion of the drive sprocket 38 is fitted on the rear axle 36, and the drive sprocket 38 is attached to the rear axle 36. Thereafter, the traveling crawler 4 is wound around the track frame 40 via the drive sprocket 38. The traveling crawler 4 is tensioned by tightening the tension adjusting bolt 45a. The operation of assembling the traveling crawler 4 to the traveling machine body 2 is completed.

  The operation of inserting the frame support portion 41 into the crawler support frame 42 will be described. Since the track frame 40 is disposed outside the lateral width of the traveling crawler 4, an upward opening of the crawler support frame 42 is positioned below the frame support portion 41 on the side of the rear axle case 9 lifted by a jack device or the like. The rear axle case 9 and the frame support portion 41 are lowered, the frame support portion 41 is inserted into the inner hole of the crawler support frame 42, and the frame support portion 41 and the crawler support frame 42 are fastened by bolts 42a. On the contrary, the bolt 42a is removed, the rear axle case 9 is lifted by a jack device or the like, the frame support portion 41 is pulled out from the crawler support frame 42, and the frame support portion 41 and the crawler support frame 42 are separated.

  Therefore, the semi-crawler type specification equipped with the traveling crawler 4 and the wheel type specification equipped with the rear wheel 50 can be configured using the rear axle case 9 and the case lid 33 having the same structure. The track frame 40 can be assembled or removed from the rear axle case 9 by either the attachment / detachment of the case lid 33 or the attachment / detachment of the crawler support frame 42.

  As is clear from the above description and FIGS. 7, 8, and 9, the seedling planting device 23 is connected to the traveling machine body 2 on which the engine 5 is mounted so as to be movable up and down, and the front axle case 7 is attached to the front portion of the traveling machine body 2. In the rice transplanter in which the front wheel 3 is disposed and the rear axle case 9 is disposed at the rear portion of the traveling machine body 2, the case lid 33 is detachably fastened to the left and right side surfaces of the rear axle case 9, and the case from the rear axle case 9 is A rear axle 36 for supporting the rear wheel 50 is protruded toward the outer side of the lid 33, and a frame support 41 for integrally attaching the track frame 40 for supporting the traveling crawler 4 is integrally formed on the case lid 33. Therefore, by using the rear axle case 9 and the case lid 33 having the same structure, the semi-crawler type specification equipped with the traveling crawler 4 and the rear wheel 50 are mounted. Was the specification of wheel type can be easily configured. That is, not only at the manufacturing factory but also at a repairable store or the like, the wheel type specification can be easily changed to the semi-crawler type specification. Conversely, it can be easily changed from a semi-crawler type specification to a wheel type specification. Therefore, it is not necessary to manufacture the traveling machine body 2 and the like separately in the wheel type specification and the semi-crawler type specification in the manufacturing factory. In addition, it is possible to easily change from a normal wheel type to a special semi-crawler type suitable for wet fields. This can reduce the inventory risk of semi-crawler type specifications with little demand at dealers.

  As is apparent from the above description and FIGS. 7, 8, and 9, the crawler support frame 42 protruded upward from the track frame 40 on the lower end side of the frame support portion 41 protruded downward from the case lid 33. The upper end side of the vehicle is fitted, the operator tightens the bolt 42a from the outside of the traveling machine body 2 (track frame 40), and the crawler support frame 42 is detachably fastened to the frame support portion 41 with the bolt 42a. Thus, the operator tightens or loosens the bolt 42a from the outside of the traveling machine body 2 (track frame 40) to attach or detach the crawler support frame 42 (or attach / detach the case lid 33). By doing so, the track frame 40 can be assembled to or removed from the rear axle case 9. That is, it can be easily changed to the wheel type specification or the semi-crawler type specification by a simple disassembly and assembly work from the outside of the machine.

  As is apparent from the above description and FIGS. 7, 8, and 9, the upper and lower side edges of the case lid 33 are extended in the vertical direction, and a pair of upper and lower frames are formed on the upper and lower ends of the case lid 33. Since the support portions 41 are integrally formed, the upper and lower frame support portions 41 of the case lid 33 disposed on the left and right side surfaces of the rear axle case 9 are selectively used, and the left and right case lids 33 have left and right tracks. The frame 40 can be easily connected. That is, the left and right case lid bodies 33 whose left and right side support postures of the rear axle case 9 are upside down are left and right through the frame support portions 41 on the side of the upper and lower frame support portions 41 protruding downward. Each of the track frames 40 can be connected. Therefore, the left and right traveling crawlers 4 can be easily arranged on both the left and right sides of the rear axle case 9 by using the right and left case lid bodies 33 having the same structure respectively fastened to the left and right side surfaces of the rear axle case 9. Parts such as the case lid 33 can be manufactured at low cost, and the parts such as the case lid 33 can be easily managed in an assembly factory or the like.

It is a side view of a riding type rice transplanter. It is the same top view. It is a top view which shows a traveling body and a traveling crawler. It is a side view of a traveling machine body rear part. It is a top view of a traveling machine body rear part. It is a perspective view which shows a traveling body and a traveling crawler. It is a side view which shows the attachment part of a traveling crawler. It is a perspective view which shows the attachment part of a traveling crawler. It is a side view which shows the attachment aspect of a traveling crawler and a rear wheel.

2 traveling machine body 3 front wheel 4 traveling crawler 5 engine 7 front axle case 9 rear axle case 23 seedling planting case 33 case lid 36 rear wheel 40 track frame 41 frame support portion 42 crawler support frame 50 rear wheel

Claims (2)

A rice planting in which a seedling planting device is connected to a traveling machine body mounted with an engine so as to be movable up and down, front wheels are arranged through a front axle case at a front part of the traveling machine body, and a rear axle case is arranged at a rear part of the traveling machine body. In the machine
A case lid is detachably fastened to the left and right side surfaces of the rear axle case, a rear axle for supporting a rear wheel projects from the rear axle case toward the outer side of the case lid, and a traveling crawler is supported by the case lid. A frame support portion for mounting a track frame for the vehicle is integrally formed so as to protrude downward from the case lid, and the upper end of the crawler support frame protruded upward from the track frame on the frame support portion A rice transplanter characterized in that the side is detachably fastened . The upper and lower side edges of the case lid are extended in the vertical direction, and the pair of upper and lower frame support portions are integrally formed on the upper and lower ends of the case lid, respectively. Rice transplanter as described in

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