JP2010046029A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a field surface to be leveled by rotatably driving only a land-leveling device in a stopped state of a transplanting device mounted on a transplantation implement in a transplanter such as a riding-type rice transplanter obtained by linking the transplantation implement equipped with a seedling-carrying platform reciprocally moving in the right and left direction, and a transplanting device for scraping up seedlings put on the seedling-carrying platform and transplanting the seedlings on the field, to the rear part of a traveling machine body so as to be freely lifted and lowered, and arranging the land-leveling device between the traveling machine body and the transplanting implement. <P>SOLUTION: The transplanter is constituted as follows. A branching transmission part D for distributing a power transmitted from the traveling machine body 4 to a transplanting power for the transplanting device 21, and a land-leveling power for the land-leveling device 27 is installed, and a transplanting clutch 44 for cutting off the power for the transplanting device 21 is arranged in a transplantation power-transmitting channel at the downstream side of the branching transmission part D. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transplanter such as a riding type rice transplanter, and more particularly to a transplanter including a leveling device such as a leveling rotor for leveling a field in front of a planting work machine.

  Conventionally, a planting work machine is connected up and down through a lifting link mechanism provided at the rear part of the traveling machine body, and a leveling roller (a leveling device) is provided in front of the planting work machine, that is, in front of a leveling float for leveling a farm scene. ), And the ground leveling roller is driven to rotate in the direction of travel of the traveling machine at the position where the leveling roller contacts the field, so that the rough field scene is crushed and leveled (leveling) in front of the seedling planting position. A riding-type rice transplanter configured to perform leveling work and planting work by a planting device is known (for example, see Patent Document 1).

Also, power is distributed and transmitted from the traveling machine body to the planting device of the planting work machine that is connected to the rear of the traveling machine body so as to be movable up and down, and the leveling rotor (ground leveling apparatus) provided in front of the planting work machine. In order to do so, a torque limiter for planting power is provided in the downstream power transmission path from the power distribution position to the planting device, and a work machine (leveling ground) is disposed in the power transmission path upstream of the power distribution position. A rotor is provided with a torque limiter for power, and the cutting torque of the torque limiter for working machine power is set to be higher than the cutting torque of the torque limiter for planting power (for example, Patent Document 2).
JP 2007-75067 A (page 3-4, FIG. 2 to FIG. 6) JP 2007-236263 A (page 3-5, FIG. 2 to FIG. 4)

  However, in the thing of the patent document 1 and the patent document 2 which were mentioned above, a planting apparatus is provided in the power transmission path | route upstream of the feed case (input case) which distributes the motive power transmitted from a traveling body to a planting apparatus and a leveling apparatus. There is provided a planting clutch (work machine clutch) that connects and disconnects the power to the ground. If the planting clutch is in the disengaged state, the leveling device cannot be driven to rotate. That is, it is impossible to level the field by rotating only the leveling device in a state where the driving of the planting device is stopped. Therefore, when the riding type rice transplanter is driven with the planting clutch disengaged as described above and the leveling device lowered to the working position for grounding the field scene, the field level is dragged by the leveling device. In order to prevent the surface from being dragged, it was necessary to provide a separate drag preventing means.

  Moreover, in the thing of patent document 2, high torque is required for the power transmission path | route upstream from the input (distribution) case which distributes the motive power transmitted from a traveling body to a planting apparatus and a leveling rotor, ie, the transmission side. Therefore, it is necessary to prevent the breakage of the power transmission mechanism in the input case in which the high torque acts.

An object of the present invention is to solve the above-described problems, and a seedling mounting table that reciprocates left and right, and a planting device that scrapes the seedlings mounted on the seedling mounting table and transplants the seedlings into a field. Power transferred from the traveling machine body in a transplanting machine in which a grounding device is disposed between the traveling machine body and the planting work machine. Is provided with a branch transmission portion that distributes the power to the planting power to the planting device and the leveling power to the leveling device, and the power to the planting device is connected to the planting power transmission path downstream of the branch transmission portion. The first feature is that the planting clutch is arranged.
And, a torque limiter is interposed in the planting power transmission path and the leveling power transmission path on the downstream side of the branch transmission unit, respectively, and the overload acting on the planting apparatus or the leveling apparatus is individually blocked. Is the second feature.

According to the first aspect of the present invention, the branch transmission unit that distributes the power transmitted from the traveling machine body to the planting power to the planting device and the leveling power to the leveling device is provided, and the downstream side of the branch transmission unit. By arranging a planting clutch for connecting / disconnecting power to the planting device in the planting power transmission path of the planting plant, with the planting device stopped driving, only the leveling device is driven to level the field scene Will be able to. That is, when the transplanter is run with the planting clutch disengaged and the leveling device lowered to the working position where it touches the field scene, stable leveling work can be performed without causing dragging of the field scene by the leveling device. As a result, it is not necessary to provide separate means for preventing dragging of the farm scene as in the prior art.
According to the second aspect of the present invention, a torque limiter is provided in each of the planting power transmission path and the leveling power transmission path on the downstream side of the branch transmission unit, and the overload acting on the planting apparatus or the leveling apparatus is respectively applied. For example, the planting device adopts a torque limiter for planting power that operates with low torque, while the leveling device operates with leveling that operates with high torque. If a power torque limiter is employed, the torque limiter corresponding to an overload acting on both devices can be appropriately shut off to prevent damage to both devices.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a riding type rice transplanter 1 as an example of a transplanting machine, and FIG. 2 is a transmission diagram of the riding type rice transplanter 1. The riding type rice transplanter 1 includes a pair of left and right front wheels 2 and a rear. A traveling machine body 4 supported by the wheel 3 is provided, and on the left and right sides thereof, a folding-type preliminary seedling stage 5 extending from the front to the rear part of the traveling machine body 4 is disposed.

  An engine 7 (not shown) covered with a bonnet 6 is mounted on the front side of the traveling machine body 4, and a steering wheel 8, a driving operation panel 9, a main transmission lever 11, and the like are provided behind the bonnet 6. The machine body cover 15 which supports the part 12, the step 13 which forms the floor of this control part 12, and the seat 14 is provided.

  In addition, a planting work machine 17 is connected to the rear of the traveling machine body 4 via a lifting link mechanism 16 so as to be lifted and lowered. The planting work machine 17 is provided with a resin seedling mounting table 18 that inclines in a low shape before and after, and a plurality of planting claws 19 for scraping and planting the mat seedlings N placed on the seedling mounting table 18. The planting device 21 and a leveling float 22 for leveling the farm scene (planted rice field) are provided below the planting device 21. However, these basic configurations are all conventional and detailed. The detailed explanation is omitted.

  In the space S between the rear wheel 3 and the leveling float 22, that is, in front of the planting work machine 17, a leveling device in which a plurality of leveling rotors 25 are supported on the rotor shaft 26 over substantially the entire width of the planting work machine 17. 27, and by rotating the ground leveling rotor 25 in a state where it is in contact with the farm scene, the rough farm scene in front of the planting position of the mat seedling N by the planting claws 19 can be leveled. It is composed.

  Further, as shown in FIG. 2, the power output from the engine 7 described above is input into a transmission case 29 via a hydrostatic continuously variable transmission (HST) 28, and is provided in the transmission case 29. The driving power and the planting power are branched downstream of the clutch mechanism 31, and the branched planting power is output to the planting PTO shaft 33 via the planting power transmission mechanism 32.

  Then, the planting power output from the planting PTO shaft 33 is branched in the left-right direction via a bevel gear mechanism provided in the planting input case 34, that is, the branch transmission portion D, as shown in FIGS. The power branched in the left direction in the figure is directly transmitted to the leveling device 27 via the torque limiter 36 for working machine power provided at the shaft end of the power distribution shaft 35L and the clutch (mechanism 37). The power branched in the middle right direction is input to the planting speed change case 38 provided at the right (one side) end of the planting work machine 17 via the power distribution shaft 35R.

  More specifically, a torque limiter 39 for planting power is provided at the shaft end of the power distribution shaft 35R described above, and the operating speed of the planting device 21 is shifted to a plurality of stages in the planting transmission case 38. The inter-strain transmission mechanism 41, the constant speed / inconstant speed switching mechanism 42 for switching the rotational speed of the planting device 21 from constant speed rotation to inconstant speed rotation, or from inconstant speed rotation to constant speed rotation, and the lateral feed of the seedling stage 18 A transmission mechanism 43 and a planting clutch (mechanism) 44 for connecting and disconnecting power to the planting device 21 are provided.

  Further, a link holder 45 is attached to the rear end of the above-described lifting link mechanism 16, and a planting frame 46 having a square cross section extends in the left-right direction of the traveling machine body 4 at the lower part of the link holder 45. is doing. At the rear end of the planting frame 46, a plurality of planting transmission cases 47 having a chain transmission mechanism 47 a for operating the planting device 21 are attached at predetermined intervals in the width direction of the traveling machine body 4.

  A planting power distribution shaft 48 extending in the left-right direction of the planting frame 46 is extended from the downstream of the constant speed / unconstant speed switching mechanism 42 provided in the planting transmission case 38. The planting power distribution shaft 48 penetrates each planting transmission case 47 and supplies power to each planting device 21 via the strut clutch mechanism 49 and the chain transmission mechanism 47a built in each planting transmission case 47. introduce.

  Further, at the parallel position of the planting power distribution shaft 48, a lateral feed shaft 51 for laterally feeding the seedling mounting table 18 (reciprocating left and right) is provided. The lateral feed shaft 51 is a screw shaft having a spiral groove formed on the outer periphery thereof, and an outer cylinder on the outer periphery of which a slide block (not shown) that engages with the spiral groove and is connected to the back surface of the seedling mount 18 is fitted. 52 is provided, and the seedling table 18 is laterally fed through a slide block that reciprocates in the left-right direction in conjunction with the rotation of the lateral feed shaft 51.

  The lateral feed shaft 51 is shorter than the planting power distribution shaft 48 and is arranged to be biased to the right end side of the planting power distribution shaft 48. It is rotationally driven through a mechanism 43. That is, the lateral feed speed of the seedling stage 18 is changed to a plurality of stages according to the speed change operation of the lateral feed speed change mechanism 43 by the lateral feed speed change operation lever 53 protruding sideways from the planting speed change case 38.

  According to the embodiment of the present invention described above, the planting input case 34 (branch transmission portion D) that branches the power transmitted from the traveling machine body 4 in the left-right direction is provided. By arranging so as to distribute the power to the planting speed change case 38 in which the lateral feed speed change mechanism 43 of the seedling platform is installed, and the leveling device 27 provided between the traveling machine body 4 and the planting work machine 17, Since the power take-out from the traveling machine body 4 to the planting work machine 17 and the leveling device 27 can be unified and configured simply, the cost can be reduced.

  At this time, as shown in FIGS. 3 to 5, the power distribution shafts 35 </ b> L and 35 </ b> R branched in the left-right direction via the bevel gear mechanism (branch transmission portion D) provided in the planting input case 34, and the leveling device 27 By making the lifting / lowering pivot P substantially coincide (coaxially configured) in a side view, the power distribution shafts 35L and 35R can also be used as lifting / lowering pivots for the leveling device 27 and, as shown in FIG. The ground leveling power input case 55 having a chain transmission mechanism 55a for transmitting the power branched off to the leveling device 27 from the power distribution shaft 35L is stored away from the work position where the leveling device 27 is grounded to the field scene. It is used as a rotating arm for changing to a position, and a dedicated rotating arm, a power transmission joint, or the like is not required, thereby reducing costs.

  The support structure of the leveling device 27 will be described in more detail. A boss 58 that pivotally supports the operation shaft 57 is fixed to the upper part of the pair of left and right seedling stand support stays 56 erected on the planting frame 46. A bracket 61 having a U-shaped cross-section in a side view is fixed to a pipe body 59 that is externally fitted and positioned and fixed to one end of the shaft 56, and further, the leveling device 31 is attached to the bracket 61 in the field. An elevating operation lever 62 that can be changed to a work position that contacts the surface and a storage position that is separated from the farm scene is attached.

  A rotating arm 63 is fixed to both ends and a middle portion of the operation shaft 57, and a suspension arm 64 is suspended from and connected to the tip of the rotation arm 63, and a lower end portion of the suspension arm 64. Are connected to the middle part of the turning arm 65 of the leveling device 27 that rotates around the above-mentioned lifting and turning pivot P and the middle part of the leveling power input case 55.

  Furthermore, a lever guide 66 having a plurality of locking grooves (not shown) for the lifting operation lever 62 is provided on the left and right seedling stage support stay 56 on which the lifting operation lever 62 is arranged. By locking the locking piece 62a included in the locking groove at a desired position of the locking groove, there are a large number of positions ranging from a storage position where the leveling device 27 is separated from the field scene and a work position where the leveling device 27 contacts the field scene. It can be adjusted in stages. In addition, in the operation position where the leveling device 27 touches the field scene, the leveling rotor 25 constituting the leveling device 27 can be adjusted in a range where the protruding amount from the lower surface of the leveling float 22 is 10 to 40 mm.

  By the way, the planting input case 34 that branches the power transmitted from the traveling machine body 4 in the left-right direction is disposed in the center of the leveling device 27 in the left-right direction, that is, in front of the planting work machine 17 located at the center in the left-right direction. At the same time, the power is directly transmitted from the planting input case 34 to the leveling device 27, so that the right and left balance of the planting work machine 17 and the leveling device 27 is not lost to the leveling device 27. Power can be transmitted evenly to the left and right, and the right and left equalizing performance and rotation balance of the leveling rotor 25 constituting the leveling device 27 can be ensured.

  Further, as a clutch for connecting / disconnecting power to each planting device 21, a planting clutch (mechanism) is installed in a planting power transmission path (inside the planting transmission case 38) on the downstream side of the branch transmission portion D in the planting input case 34. ) 44 is arranged, and in a state where the driving of each planting device 21 is stopped, only the leveling device 27 is driven to level the farm scene. That is, when the riding type rice transplanter 1 is driven in a state where the planting clutch 44 is disengaged and the leveling device 27 is lowered to the working position where it contacts the field scene, the field leveling device 27 does not drag the field scene. Since stable leveling work can be performed, it is not necessary to provide a separate means for preventing dragging of a conventional farm scene. Further, as a clutch for connecting / disconnecting power to the leveling device 27, a clutch (mechanism) 37 is provided in the leveling power transmission path downstream of the branch transmission portion D in the planting input case 34, and the planting device 21 plantes the planting power by the planting device 21. Attaching work and leveling work by the leveling device 27 can be performed simultaneously or independently.

  A torque limiter 36 corresponding to the leveling device 27 is provided at the shaft end of the power distribution shaft 35L branched to the left side via the branch transmission portion D in the planting input case 34, while the power distribution shaft 35R branched to the right side. By providing a torque limiter 39 corresponding to each planting device 21 at the shaft end of the shaft, after distributing power to the leveling device 27, the transplantation torque by the torque limiter 39 can be set appropriately. It is not necessary to increase the strength of the devices 21 unnecessarily, and the rotational speed of each planting device 21 is changed from a constant speed rotation to an inconstant speed rotation or from an inconstant speed rotation to a constant speed on the downstream side of the planting input case 34. By providing a constant speed / non-constant speed switching mechanism 42 for switching to rotation, a stable uniform speed rotation can be imparted to the leveling rotor 25 constituting the leveling device 27 to obtain good leveling performance. Can.

  Further, the planting transmission case 38 is provided with an inter-strain transmission mechanism 41 for shifting the operating speed of the planting device 21, and the planting transmission case 38 is provided at one end of the planting work machine 17. The ground leveling device 27 provided between the traveling machine body 4 and the planting work machine 17 is configured by transmitting the power output from the transmission case 38 via the planting power distribution shaft 48 to the planting device 21. Since the space with the planting work machine 17 can be ensured, the degree of freedom of design in the space, that is, the back side of the seedling stage 18 is improved.

  6 shows the planting power output from the planting PTO shaft 33 after branching in the left-right direction via a bevel gear mechanism (branch transmission portion D) provided in the planting input case 34. The power distribution shaft 35L in the middle left direction is extended to the left end side of the planting work machine 17, and planting is performed via a torque limiter 36 and a clutch (mechanism) 37 provided at the shaft end of the extended power distribution shaft 35L. Power is transmitted from the left end side of the work machine 17 to the leveling device 27 by the leveling power input case 55 having a chain transmission mechanism 55a, and the power branched in the right direction in the figure is planted through the power distribution shaft 35R. In this case, the leveling power input case 55 and the planting transmission case 38 are arranged separately on the left and right ends of the planting work machine 17. So planted Left-right balance of the soil preparation device 27 which is supported on the working machine 17 and the plant with the working machine 17 there is an advantage to stabilize. Furthermore, the ground leveling power input case 55 can be used as a left end side (outside) rotating arm for changing the ground leveling device 27 to a working position for grounding the leveling device 27 and a retracted position separated from the field scene. Therefore, the cost can be reduced.

  7 shows that the planting power output from the planting PTO shaft 33 branches rightward through a bevel gear mechanism provided in the planting input case 34, and then through the power distribution shaft 35. A ground leveling power input case in which a clutch (mechanism) 37 is interposed in the power distribution shaft 35 and a chain transmission mechanism 55a is provided in the middle of inputting to a planting speed change case 38 provided at the right end of the planting work machine 17. The branch transmission unit D for transmitting the power to the leveling device 27 is configured by 55, and in this configuration, the power distribution shaft 35 can be shortened and the power transmission structure to the leveling device 27 can be configured simply. Cost can be reduced.

  By the way, the branch transmission part D which distributes the motive power transmitted from the traveling machine body 4 to the planting power to the planting device 21 and the leveling power to the leveling device 27 as described above is provided, and the branch transmission unit D is provided via this branch transmission unit D. When distributing power to the planting device 21 provided in the planting work machine 17 and the leveling device 27 disposed between the traveling machine body 4 and the planting work machine 17, the planting on the downstream side of the branch transmission unit D is distributed. For example, the torque limiters 36 and 39 are respectively provided in the attached power transmission path and the leveling power transmission path so that the overloads acting on the planting device 21 or the leveling device 27 are individually blocked. If the planting device 21 employs a torque limiter for planting power that operates by cutting with a low torque, while the leveling device 27 employs a torque limiter for planting power that operates by cutting with a high torque, both devices 2 , It is possible to properly shut-off to prevent damage of both devices 21 and 27 in the torque limiter corresponding to the overload acting on the 27. In addition, since the number of planting power torque limiters can be reduced, in this case, the cost can be reduced together with the weight reduction.

The side view of a riding type rice transplanter. Transmission diagram of a riding rice transplanter. The expanded view which shows the principal part of the transmission structure of a planting work machine and a leveling apparatus. The right view which shows the support structure of a leveling apparatus. The right view which shows the raising / lowering operation mechanism of a leveling apparatus. The expanded view which shows the principal part of the transmission structure (other example) of a planting work machine and a leveling apparatus. The expanded view which shows the principal part of the transmission structure (other example) of a planting work machine and a leveling apparatus.

Explanation of symbols

4 traveling machine body 17 planting work machine 18 seedling stand 21 planting device 27 leveling device 36 torque limiter (for working machine power)
39 Torque limiter (for planting power)
44 Planting clutch D Branch transmission part

Claims (2)

  A planting work machine (17) provided with a seedling stage (18) that reciprocates left and right, and a planting device (21) that scrapes the seedlings placed on the seedling stage (18) and transplants the seedlings onto a farm field. In the transplanter in which the leveling device (27) is disposed between the traveling machine body (4) and the planting work machine (17). A branch transmission section (D) for distributing power transmitted from (4) to planting power to the planting apparatus (21) and leveling power to the leveling apparatus (27) is provided, and the branch transmission section ( D) A transplanting machine in which a planting clutch (44) for connecting and disconnecting power to the planting device (21) is arranged in a planting power transmission path on the downstream side.   Torque limiters (36, 39) are interposed in the planting power transmission path and the leveling power transmission path on the downstream side of the branch transmission section (D), respectively, and act on the planting device (21) or the leveling device (27). A transplanter configured to block loads individually.

Images