JP4705464B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter such as a riding rice transplanter, and more particularly, to a transplanter provided with a leveling rotor that performs leveling on the front side of a planting work machine.

  In recent years, a transplanter including a leveling rotor at the front of a planting work machine is known (see, for example, Patent Document 1). In such a transplanter, since leveling can be performed simultaneously with planting, the planting accuracy and work efficiency can be improved.In particular, the leveling effect by the leveling rotor is remarkable in the headland where the field surface is rough due to the aircraft turning. Yes, planting accuracy can be greatly improved.

Moreover, since the leveling rotor shown by patent document 1 is a rotor which has several leveling boards in the rotor outer periphery at predetermined intervals, the dust and sawdust which float on a paddy field can be swallowed in the soil. That is, the ground leveling plate of the rotor draws a trajectory as shown in FIG. 8 along with the traveling of the airframe and the rotation of the leveling rotor, so that dust and sawdust floating on the paddy field are sequentially swept into the soil.
JP 2004-65111 A

  By the way, the leveling rotor described in Patent Document 1 is provided such that the height of the leveling rotor can be adjusted with respect to the front portion of the planting work machine. It is. However, if the adjustment height of the leveling rotor is set higher than the standard height, there will be a space between the surface and the leveling plate trajectory. There is a possibility that floating garbage and sawdust cannot be swept into the soil.

The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems. The planting work machine is connected to the rear part of the traveling machine body so as to be movable up and down, and the planting work machine. A leveling rotor that performs leveling on the front side of the machine, and a leveling rotor in which the leveling rotor is provided such that the height of the leveling rotor can be adjusted with respect to the planting work machine, and the rotational speed of the leveling rotor is changed. It comprises a speed change mechanism and a leveling rotor automatic speed change means that automatically shifts the leveling rotor speed change mechanism to a high speed side when an adjustment height of the leveling rotor is higher than a standard height. In this way, even if the leveling rotor is adjusted to a position higher than the standard, the rotation speed of the leveling rotor is automatically shifted to the high speed side, so that dust and debris floating on the paddy surface can be swallowed well. Can do.
Further, the leveling rotor automatic transmission means automatically shifts the leveling rotor transmission mechanism to a low speed side when an adjustment height of the leveling rotor is lower than a standard height. In this way, even if the leveling rotor is adjusted to a position lower than the standard, the rotation speed of the leveling rotor is shifted to the low speed side, so that the leveling plate trajectory of the leveling rotor is corrected and good leveling performance is maintained. can do.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling machine body of a passenger rice transplanter. The traveling machine body 1 includes an engine (not shown) mounted on the front part of the machine body, a transmission (not shown) for shifting engine power, and a transmission. A front axle case (not shown) for transmitting the traveling power output to the left and right front wheels 2, a rear axle case 4 for transmitting the traveling power output from the transmission to the left and right rear wheels 3, and a driver seat 5 provided on the fuselage. And so on.

  A planting work machine 7 is connected to the rear part of the traveling machine body 1 via a work machine connection mechanism 6 so as to be movable up and down. The planting work machine 7 includes a work machine frame 8 that is connected to the work machine connection mechanism 6 in a freely rolling manner, a seedling platform 9 provided in an inclined position above the work machine frame 8, and a plurality of plantings extending rearward from the work machine frame 8. Attached transmission case 10, a planting mechanism 11 provided at the rear end of each planting transmission case 10, a float 12 provided below the planting transmission case 10 so as to be swingable up and down, and the like.

  The planting work machine 7 inputs planting power from the transmission via the transmission shaft 13, and by this power, performs a lateral feed operation of the seedling mounting table 9, a seedling planting operation of the planting mechanism 11, and the like. The field where the planting operation is performed is previously flattened by the scraping operation, and the planting mechanism 7 is used for planting the seedling by the planting mechanism 11 while the float 12 slides there. The planting accuracy may be reduced due to the rough surface due to wheel marks, etc. In particular, the headland where the airframe is turned is a place where the roughness of the surface due to the wheel marks is remarkable, and the planting accuracy tends to decrease.

  In order to deal with the above problems, a leveling rotor 14 is provided on the front side of the planting work machine 7. The leveling rotor 14 is disposed between the rear wheel 3 and the float 12 in a side view, and performs leveling work on the front side of the float 12. Thereby, the roughening of the surface by a wheel trace, etc. can be improved, and a planting precision can be raised, and especially the improvement effect is remarkable in a headland.

  As shown in FIGS. 2 to 4, the leveling rotor 14 includes an input case 16 that inputs power from the rear axle case 4 via the transmission shaft 15, a rotor shaft 17 that extends left and right from the input case 16, and the rotor A plurality of leveling plates 18 provided integrally with the shaft 17, a cover 19 that covers the top of the leveling plate 18, a pair of left and right shaft support portions 20 that rotatably support the rotor shaft 17, and extends upward from the shaft support portions 20. The ground leveling work is performed in front of the planting work machine 7 by rotating the leveling plate 18 in a predetermined direction with the power input from the rear axle case 4 side. Further, the ground leveling plate 18 draws a trajectory as shown in FIG. 8 along with the rotation of the leveling rotor 14, so that dust and sawdust floating on the rice field can be sequentially swept into the soil.

  A pair of left and right seedling mounting stays 22 extending upward from the work machine frame 8 and a pair of left and right guide members 23 extending forward from the work machine frame 8 are integrated with the front surface portion of the planting work machine 7. The guide member 23 guides the support rod 21 of the leveling rotor 14 so as to be slidable up and down. The seedling stage stay 22 is for supporting the upper part of the seedling stage 9, but in this embodiment, the seedling stage stay 22 is also used as a support member for the leveling rotor 14. That is, the seedling support stay 22 of the present embodiment includes a rotation shaft 24 that is supported between the left and right seedling support stays 22 and a pair of left and right arms that extend forward from the left and right ends of the rotation shaft 24. 25 and a pair of left and right links 26 connecting the arm 25 to the upper end portion of the support rod 21, the leveling rotor 14 is suspended.

  The rotation shaft 24 is provided with a height adjustment lever 27 that allows a vertical rotation operation and a horizontal tilt operation. When the height adjusting lever 27 is turned up and down, the link 26 moves up and down in accordance with the turning of the turning shaft 24 and the arm 25, and the height of the leveling rotor 14 is adjusted. A lever guide 28 that holds the position of the height adjustment lever 27 is provided at the upper end of the seedling support stay 22. That is, the lever guide 28 is formed with a plurality of locking recesses 28a with a predetermined interval in the vertical direction, and locking protrusions (not shown) formed on the height adjustment lever 27 side, The height of the leveling rotor 14 can be adjusted stepwise by locking it to an arbitrary locking recess 28a according to the tilting operation of the height adjusting lever 27.

  A power take-out case 29 for taking out the power of the leveling rotor 14 from the rear wheel power transmission path is provided at the front portion of the rear axle case 4. As shown in FIG. 5, the power take-out case 29 has a power branch shaft 30 interposed in a rear wheel power transmission path from the transmission to the rear axle case 4, and the power branched by the power branch shaft 30 for the ground leveling rotor transmission mechanism. A power take-out shaft 32 input via 31 is rotatably supported, and the power output from the power take-off shaft 32 is transmitted to the leveling rotor 14 via the transmission shaft 15.

  The leveling rotor transmission mechanism 31 of the present embodiment constitutes a high-speed transmission path, a standard transmission path, and a low-speed transmission path between the power branch shaft 30 and the power take-off shaft 32, and by selectively switching these transmission paths, The rotational speed of the leveling rotor 14 is changed in three stages (high speed, standard, low speed). More specifically, the high-speed transmission path is a high-speed upstream gear 34 that is rotatably provided on the power branch shaft 30 and a high-speed upstream gear 34 that is integrally provided with the power take-off shaft 32 and that is always meshed with the high-speed upstream gear 34. The standard transmission path is composed of a downstream gear 35, and the standard transmission path is provided integrally with the power take-off shaft 32 and is continuously meshed with the standard upstream gear 36. The low-speed transmission path is composed of the standard downstream gear 37, and the low-speed transmission path is provided integrally with the power take-off shaft 32 and the low-speed upstream gear 38 that is rotatably provided on the power branch shaft 30, and is always connected to the low-speed upstream gear 38. It is comprised with the low-speed downstream gear 39 which meshes | engages.

  The power branch shaft 30 is formed with a slit-like groove 30a facing in the axial direction, and a speed change operating member 40 is slidably fitted therein. An engagement claw 40a that can be engaged with engagement grooves 34a, 36a, 38a formed in the inner peripheral portions of the upstream gears 34, 36, 38 is formed at one end of the speed change operation member 40, and the speed change operation is performed. One of the upstream gears 34, 36, 38 is rotated integrally with the power branch shaft 30 by selectively engaging the engaging claws 40a with the engaging grooves 34a, 36a, 38a according to the sliding operation of the member 40. Let As a result, any one of the high speed transmission path, the standard transmission path, and the low speed transmission path is selected, and the rotational speed of the leveling rotor 14 is changed in three stages.

  Further, a shifter shaft 42 provided with a shifter fork 41 is supported on the power take-out case 29 so as to be slidable back and forth. The shifter fork 41 is engaged with an engagement ring 40 b provided at the other end portion of the speed change operation member 40, and causes the speed change operation member 40 to perform a speed change operation in accordance with the forward / backward sliding operation of the shifter shaft 42. In this embodiment, the electric cylinder 43 is connected to the shifter shaft 42, and the shift operation of the shifter shaft 42 is performed by the driving force of the electric cylinder 43. In this embodiment, the rotational speed of the leveling rotor 14 is changed stepwise, but the rotational speed of the leveling rotor 14 is changed steplessly using a hydraulic stepless transmission mechanism or a belt type continuously variable transmission mechanism. May be.

  As shown in FIG. 6, the traveling machine body 1 is provided with a control unit 44 configured using a microcomputer (including a CPU, a ROM, a RAM, an I / O, and the like). On the input side of the control unit 44, the leveling rotor height potentiometer 45 that detects the adjustment height of the leveling rotor 14 based on the rotation position of the rotation shaft 24, and the leveling rotor 14 based on the rod position of the electric cylinder 43. A leveling rotor speed change potentiometer 46 for detecting the speed change state is connected, and the above-described electric cylinder 43 is connected to the output side. And the control part 44 performs leveling rotor automatic transmission control (leveling rotor automatic transmission means) according to the program written in ROM.

  As shown in FIG. 7, in the leveling rotor automatic shift control, first, the adjustment height of the leveling rotor 14 is determined based on the detected value of the leveling rotor height potentiometer 45 (S1). Here, when it is determined that the adjustment height of the leveling rotor 14 is the standard height, it is determined whether or not the rotational speed of the leveling rotor 14 is standard based on the detection value of the leveling rotor speed change potentiometer 46. (S2) If the determination is NO, the electric cylinder 43 is driven, and the leveling rotor transmission mechanism 31 is automatically shifted to the standard position (S3). If it is determined that the adjustment height of the leveling rotor 14 is higher than the standard height, it is determined whether or not the rotational speed of the leveling rotor 14 is high based on the detection value of the leveling rotor speed change potentiometer 46 ( S4) If the determination is NO, the electric cylinder 43 is driven, and the leveling rotor transmission mechanism 31 is automatically shifted to the high speed side (S5). If it is determined that the adjustment height of the leveling rotor 14 is lower than the standard height, it is determined whether or not the rotational speed of the leveling rotor 14 is low based on the detected value of the leveling rotor speed change potentiometer 46 ( S6) If the determination is NO, the electric cylinder 43 is driven, and the leveling rotor transmission mechanism 31 is automatically shifted to the low speed side (S7).

  According to the present embodiment configured as described above, the planting work machine 7 connected to the rear part of the traveling machine body 1 so as to be raised and lowered and the leveling rotor 14 for leveling the front side of the planting work machine 7 are provided. At the same time, the leveling rotor 14 is a riding rice transplanter in which the height of the leveling rotor 14 is adjustable with respect to the planting work machine 7. 14 is higher than the standard height, the leveling rotor transmission mechanism 31 is automatically shifted to the high speed side, so even if the leveling rotor 14 is adjusted to a position higher than the standard, Sawdust can be scraped well.

  In this embodiment, when the adjustment height of the leveling rotor 14 is lower than the standard height, the leveling rotor transmission mechanism 31 is automatically shifted to the low speed side, so that the leveling rotor 14 is adjusted to a position lower than the standard. However, the leveling plate trajectory of the leveling rotor 14 can be optimized and good leveling performance can be maintained.

  Needless to say, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, the leveling rotor transmission mechanism is shifted by an electric cylinder, but the leveling rotor height adjustment mechanism and the leveling rotor transmission mechanism are changed. The leveling rotor speed change mechanism may be configured to be mechanically linked and to automatically shift the leveling rotor speed change mechanism with the operating force of the leveling rotor height adjustment mechanism.

It is a whole side view of a riding rice transplanter. It is a rear side view of a riding rice transplanter. It is a top view which shows the transmission structure of a planting work machine and a leveling rotor. It is a rear view which shows the support structure of a leveling rotor. It is sectional drawing of a power take-out case. It is a block diagram which shows the input / output of a control part. It is a flowchart which shows leveling rotor automatic transmission control. It is explanatory drawing which shows the leveling board locus | trajectory of a leveling rotor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 7 Planting work machine 14 Leveling rotor 18 Leveling board 22 Seedling stand stay 24 Rotating shaft 27 Height adjustment lever 29 Power take-off case 31 Leveling rotor speed change mechanism 43 Electric cylinder 44 Control part 45 Leveling rotor height potentiometer 46 Leveling rotor speed change potentiometer

Claims (2)

  A planting work machine connected to the rear part of the traveling machine body so as to be movable up and down, and a leveling rotor that performs leveling on the front side of the planting work machine, and the leveling rotor has a height higher than that of the planting work machine. A transplanter provided in an adjustable manner, wherein the leveling rotor speed change mechanism for changing the rotational speed of the leveling rotor, and the leveling rotor speed change mechanism automatically when the adjustment height of the leveling rotor is higher than a standard height A transplanting machine, comprising: a leveling rotor automatic transmission means for shifting to a high speed side.   The transplanter according to claim 1, wherein the leveling rotor automatic transmission means automatically shifts the leveling rotor transmission mechanism to a low speed side when an adjustment height of the leveling rotor is lower than a standard height.

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