WO2018110048A1 - Working vehicle - Google Patents

Working vehicle Download PDF

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Publication number
WO2018110048A1
WO2018110048A1 PCT/JP2017/036328 JP2017036328W WO2018110048A1 WO 2018110048 A1 WO2018110048 A1 WO 2018110048A1 JP 2017036328 W JP2017036328 W JP 2017036328W WO 2018110048 A1 WO2018110048 A1 WO 2018110048A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
lug
cage
traveling
planting
Prior art date
Application number
PCT/JP2017/036328
Other languages
French (fr)
Japanese (ja)
Inventor
竹山　智洋
土井　邦夫
Original Assignee
ヤンマー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ヤンマー株式会社 filed Critical ヤンマー株式会社
Priority to CN201780070061.7A priority Critical patent/CN110062576B/en
Publication of WO2018110048A1 publication Critical patent/WO2018110048A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C11/00—Transplanting machines
    • A01C11/02—Transplanting machines for seedlings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B15/00—Wheels or wheel attachments designed for increasing traction

Definitions

  • the present invention relates to a work vehicle mainly used for farm work such as a riding rice transplanter for farm work.
  • an auxiliary wheel that rotates integrally with the rear wheel is provided on the left and right inner sides or both left and right sides of the rear wheel, thereby improving the wetland running ability of the traveling machine body.
  • the lug enters the field cultivator, and the rug entraps the soil, resulting in a problem that the wetland running ability of the traveling machine body is lowered.
  • a riding rice transplanter as an example of a work vehicle has a problem that the traveling machine body sinks in a deep or clay-like field, or the traveling machine body sinks by breaking the cultivator during turning. There is a need for improved wetland running.
  • the present invention has been made in view of the above-described present situation, and has a technical problem to further improve the wet field running performance of the traveling machine body with a simple configuration.
  • a work vehicle is a work vehicle including a pair of front wheels and a pair of travel wheels that support a traveling machine body, and includes a basket wheel that is detachably attached to the travel wheel.
  • a rim portion, and a plurality of cage wheel lugs provided on the rim portion at appropriate intervals along the circumferential direction of the rim portion, and the cage wheel lug has an inner peripheral side end on the outer peripheral side in a side view. It inclines so that it may be located in the rotation direction upstream side at the time of advance of the traveling machine body rather than the section side, and the outer peripheral side end of the cage wheel lug is bent toward the rotation center side of the rim section.
  • the basket wheel lug may be arranged apart from the traveling wheel.
  • the work vehicle of the present invention may be configured such that the width of the car wheel lug is wider than the width of the traveling wheel in the rotation axis direction of the traveling wheel.
  • the work vehicle of the present invention includes a cage wheel that is detachably attached to the traveling wheel, and the cage wheel is provided on the rim portion at an appropriate interval along a circumferential direction of the annular rim portion and the rim portion.
  • a plurality of basket wheel lugs, and the basket wheel lugs are inclined such that, in a side view, the outer peripheral side end portion is positioned upstream of the inner peripheral side end portion side in the rotational direction when the traveling machine body moves forward.
  • the outer peripheral side end portion of the cage wheel lug is bent toward the rotation center side of the rim portion.
  • the mud is less lifted and mud is less likely to adhere to the cage wheel lug. This makes it easier for mud to fall and makes it difficult for mud to accumulate on the car wheel lugs, so that a car wheel with good mud removal can be realized, and the running performance of the traveling machine can be improved.
  • the width of the car wheel lug is wider than the width of the running wheel in the rotation axis direction of the running wheel, the buoyancy generated by the car wheel lug is greatly increased. Therefore, the sinking of the traveling aircraft can be suppressed in deep fields and clay fields.
  • FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6. It is a perspective view of a basket wheel, a rear wheel, and an inside auxiliary wheel. It is a separation perspective view of a basket wheel, a rear wheel, and an inside auxiliary wheel.
  • the left side in the traveling direction of the traveling machine body 2 is simply referred to as the left side
  • the right side in the traveling direction is also simply referred to as the right side.
  • the rice transplanter 1 includes a traveling machine body 2 supported by a pair of left and right front wheels 3 and a pair of left and right rear wheels 4 as traveling wheels.
  • An engine 5 is mounted on the front portion of the traveling machine body 2. Power from the engine 5 is transmitted to the rear transmission case 6 to drive the front wheels 3 and the rear wheels 4 so that the traveling machine body 2 travels forward and backward.
  • a front axle case 7 projects from the left and right sides of the transmission case 6, and the front wheels 3 are attached to a front axle 36 extending from the front axle case 7 to the left and right so as to be steerable.
  • a cylindrical frame 8 protrudes behind the transmission case 6, a rear axle case 9 is fixed to the rear end side of the cylindrical frame 8, and the rear wheel 4 is attached to a rear axle 37 that extends outward from the rear axle case 9 to the left and right. ing.
  • an operator boarding work step (vehicle body cover) 10 is provided on the upper surface side of the front part and the central part of the traveling machine body 2.
  • a front bonnet 11 is disposed above the front part of the work step 10, and the engine 5 is installed inside the front bonnet 11.
  • a traveling speed change pedal 12 for stepping operation is disposed on the upper side of the work step 10 on the rear side of the front bonnet 11.
  • a steering handle 14 a traveling main transmission lever (not shown), and a work lever 16 as a lifting operation tool are provided on the driving operation unit 13 on the rear upper surface side of the front bonnet 11.
  • a steering seat 18 is disposed via a seat frame 17 behind the front bonnet 11 on the upper surface of the work step 10.
  • 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.
  • the link frame 19 is erected at the rear end of the traveling machine body 2.
  • An eight-row seedling planting device 23 is connected to the link frame 19 via an elevating link mechanism 22 including a lower link 20 and a top link 21 so as to be elevable.
  • a hitch bracket 38 is provided on the front side of the seedling planting device 23 via a rolling fulcrum shaft (not shown).
  • the seedling planting device 23 is disposed behind the traveling machine body 2 so as to be movable up and down.
  • the cylinder base end side of the hydraulic lift cylinder 39 is supported on the rear upper surface of the cylindrical frame 8 so as to be vertically rotatable.
  • the rod tip side of the lifting cylinder 39 is connected to the lower link 20.
  • the seedling planting device 23 moves up and down.
  • the seedling planting device 23 is configured to be rotatable about the rolling fulcrum axis so as to be able to change the inclined posture in the left-right direction.
  • the operator gets on the work step 10 from the boarding / alighting step 25 on the side of the work step 10 and drives the seedling planting device 23 to move the seedling planting device 23 and move the seedling planting in the field while moving in the field by the driving operation.
  • Perform work rice planting work.
  • the operator replenishes the seedling planting device 23 with a seedling mat on the preliminary seedling mounting table 24 as needed.
  • the seedling planting device 23 includes a planting input case 26 to which power is transmitted from the engine 5 via the mission case 6, and four sets of eight strips connected to the planting input case 26.
  • Planting transmission case 27 (one set in Nijo), seedling planting mechanism 28 provided on the rear end side of each planting transmission case 27, seedling mount 29 for eight-row planting, and each planting transmission case 27 And a float 32 for leveling the farm scene disposed on the lower surface side of the head.
  • the seedling planting mechanism 28 is provided with a rotary case 31 having two planting claws 30 for one line. Two rotary cases 31 are arranged in the planting transmission case 27.
  • a leveling rotor 85 for leveling (leveling) the farm scene is provided so as to be movable up and down.
  • the power from the engine 5 via the transmission case 6 is transmitted not only to the front wheels 3 and the rear wheels 4 but also to the planting input case 26 of the seedling planting device 23.
  • the power from the transmission case 6 toward the seedling planting device 23 is once transmitted to the inter-plant transmission case 75 provided on the upper right side of the rear axle case 9, and is transmitted from the inter-plant transmission case 75 to the planting input case 26.
  • the seedling planting mechanism 28 and the seedling mount 29 are driven by the transmitted power.
  • the inter-strain shifting case 75 includes an inter-strain shifting mechanism 76 that switches between planted seedlings to, for example, sparse planting, standard planting, or dense planting, and a planting clutch 77 that interrupts power transmission to the planting planting device 23. (See FIG. 5).
  • a side marker 33 is provided on the left and right outside of the seedling planting device 23.
  • the side marker 33 includes a marker ring body 34 for muscle pulling and a marker arm 35 that pivotally supports the marker ring body 34 so as to be rotatable.
  • the base end side of each marker arm 35 is pivotally supported on the left and right outer sides of the seedling planting device 23 so as to be rotatable left and right.
  • the side marker 33 raises the marker wheel body 34 by raising the work posture and the working posture that forms the locus that becomes the reference in the next process on the farm scene based on the operation of the work lever 16 in the driving operation unit 13. It is comprised so that it can rotate to the non-working posture separated from.
  • the traveling machine body 2 includes a pair of left and right machine body frames 50 extending in the front-rear direction.
  • Each body frame 50 is divided into a front frame 51 and a rear frame 52.
  • the rear end portion of the front frame 51 and the front end portion of the rear frame 52 are welded and fixed to a laterally long intermediate connection frame 53.
  • the front ends of the pair of left and right front frames 51 are fixed to the front frame 54 by welding.
  • the rear end sides of the left and right rear frames 52 are fixed to the rear frame 55 by welding.
  • the front frame 54, the left and right front frames 51, and the intermediate connection frame 53 are configured in a square frame shape in plan view.
  • the intermediate connection frame 53, the left and right rear frames 52, and the rear frame 55 are also configured in a square frame shape in plan view.
  • each base frame 56 is connected by two front and rear base frames 56.
  • An intermediate portion of each base frame 56 is formed in a shape bent into a U shape so as to be positioned lower than the left and right front frames 51.
  • the left and right end portions of each base frame 56 are fixed to the corresponding front frame 51 by welding.
  • the engine 5 is mounted on and supported by the front and rear base frames 56 via a substantially flat engine stand 57 and a plurality of vibration isolating rubbers (not shown).
  • the rear base frame 56 is connected to the front portion of the transmission case 6 via the rear relay bracket 60.
  • the rear portions of the left and right front frames 51 are connected to a front axle case 7 protruding from the left and right sides of the mission case 6.
  • the left and right ends of a U-shaped frame 61 extending rearward and obliquely downward in a side view are welded and fixed to the center side of the intermediate connection frame 53.
  • the middle part of the U-shaped frame 61 is connected to the middle part of the cylindrical frame 8 that connects the transmission case 6 and the rear axle case 9 (see FIGS. 3 and 4).
  • the upper end sides of the left and right vertical frames 62 are welded and fixed to the middle portion of the rear frame 55.
  • An intermediate portion of a laterally long rear axle support frame 63 is fixed by welding to the lower ends of the left and right vertical frames 62.
  • the left and right ends of the rear axle support frame 63 are connected to the rear axle case 9.
  • a muffler 65 for reducing the exhaust noise of the engine 5 is disposed below the step support base 64 projecting outward from the left front frame 51.
  • a power steering unit 66 is provided in the front part of the mission case 6 disposed behind the engine 5. Although details are omitted, a handle shaft is rotatably disposed inside a handle post erected on the upper surface of the power steering unit 66. A steering handle 14 is fixed to the upper end side of the handle shaft. On the lower surface side of the power steering unit 66, a steering output shaft (not shown) protrudes downward. A steering rod 68 (see FIG. 4) for steering the left and right front wheels 3 is connected to the steering output shaft.
  • the engine 5 of the embodiment is disposed on an intermediate portion of the front and rear base frames 56 with the output shaft 70 (crank shaft) directed in the left-right direction.
  • the left and right widths of the engine 5 and the engine stand 57 are smaller than the inner dimensions between the left and right front frames 51, and the lower side of the engine 5 and the engine stand 57 are disposed on the middle part of the front and rear base frames 56. Thus, it is exposed below the left and right front frames 51.
  • the output shaft 70 (axis line) of the engine 5 is in a position overlapping the left and right front frames 51 in a side view.
  • An exhaust pipe 69 communicating with the exhaust system of the engine 5 is disposed on one of the left and right side surfaces (left side surface in the embodiment) of the engine 5.
  • the proximal end side of the exhaust pipe 69 is connected to each cylinder of the engine 5, and the distal end side of the exhaust pipe 69 is connected to the exhaust inlet side of the muffler 65.
  • the output shaft 70 of the engine 5 protrudes outward from the left and right side surfaces of the engine 5.
  • An engine output pulley 72 is provided at the protruding end of the output shaft 70 that protrudes from the left side of the engine 5
  • a mission input pulley 73 is provided at the mission input shaft 71 that protrudes outward from the mission case 6, and is transmitted to both pulleys 72, 73.
  • a belt is wrapped around. Power is transmitted from the engine 5 to the transmission case 6 via both pulleys 72 and 73 and a transmission belt.
  • the transmission power through the hydraulic continuously variable transmission 40, the planetary gear device 41, the hydraulic continuously variable transmission 40, and the planetary gear device 41 including the hydraulic pump 40 a and the hydraulic motor 40 b is shifted to a plurality of stages.
  • the hydraulic pump 40a is driven by power from the mission input shaft 71, hydraulic oil is supplied from the hydraulic pump 40a to the hydraulic motor 40b, and variable speed power is output from the hydraulic motor 40b.
  • the speed change power of the hydraulic motor 40 b is transmitted to the gear type subtransmission mechanism 42 via the planetary gear device 41 and the main clutch 43. Then, power is transmitted from the gear-type sub-transmission mechanism 42 by branching in the two directions of the front and rear wheels 3 and 4 and the seedling planting device 23.
  • Part of the branching power toward the front and rear wheels 3 and 4 is transmitted from the gear-type auxiliary transmission mechanism 42 via the differential gear mechanism 45 to the front axle 36 of the front axle case 7 to drive the left and right front wheels 3 to rotate. .
  • the remainder of the branching power toward the front and rear wheels 3, 4 is transmitted from the gear-type sub-transmission mechanism 42 through the universal joint shaft 46, the rear drive shaft 47 in the rear axle case 9, a pair of left and right friction clutches 48, and a gear-type transmission mechanism 49.
  • the rear axle case 9 is transmitted to the rear axle 37 to drive the left and right rear wheels 4 to rotate.
  • the traveling brake 44 is operated, the output from the gear-type subtransmission mechanism 42 is lost, so that the front and rear wheels 3 and 4 are braked.
  • the friction clutch 48 inside the turning inside the rear axle case 9 is turned off to rotate the rear wheel 4 inside the turning freely, and the rotation of the rear wheel 4 outside the turning to which power is transmitted is rotated. It turns by driving.
  • a rotor drive unit 86 having a leveling rotor clutch for power transmission to the leveling rotor 85 is provided.
  • the power transmitted from the gear-type subtransmission mechanism 42 to the universal joint shaft 46 is also branched and transmitted to the rotor drive unit 86, and is transmitted from the rotor drive unit 86 to the leveling rotor 85 via the universal joint shaft 87.
  • the farm scene is leveled by the rotational drive of the leveling rotor 85.
  • the branching power toward the seedling planting device 23 is transmitted to the inter-stock transmission case 75 via the PTO transmission shaft mechanism 74 with a universal joint shaft.
  • an inter-strain shifting mechanism 76 that switches between seedlings to be planted, for example, to sparse planting, standard planting, or dense planting, and a planting clutch 77 that interrupts power transmission to the planting planting device 23 I have.
  • the power transmitted to the inter-plant transmission case 75 is transmitted to the planting input case 26 via the inter-plant transmission mechanism 76, the planting clutch 77, and the universal joint shaft 78.
  • a horizontal feed mechanism 79 that moves the seedling platform laterally, a seedling vertical feed mechanism 80 that transports the seedling mat on the seedling platform 29 vertically, and the planting input case 26.
  • a planting output shaft 81 that transmits power to the planting transmission case 27 is provided.
  • the lateral feed mechanism 79 and the seedling vertical feed mechanism 80 are driven, and the seedling stage 29 is continuously reciprocally moved in the lateral direction.
  • the seedling mat on the seedling table 29 is intermittently transported vertically when reaching the turning point of the reciprocating movement.
  • Power from the planting input case 26 via the planting output shaft 81 is transmitted to each planting transmission case 27, and the rotary case 31 and the planting claw 30 of each planting transmission case 27 are driven to rotate.
  • motive power is transmitted from the inter-strain transmission case 75 to a fertilizer.
  • the inner auxiliary wheel 120, the rear wheel 4, and the cage wheel 100 are arranged in order from the left and right inner sides.
  • the left and right inner auxiliary wheels 120 include a hub cylinder 121 located at the center of rotation, an annular rim 122, and a spoke 123 that extends radially from the hub cylinder 121 and connects the hub cylinder 121 and the rim 122. And.
  • the rim portion 122 is formed with a rubber ring body 124 and a plurality of protruding outer peripheral lugs 125 by baking hard rubber around the rim portion 122.
  • the front end side (left and right outer sides) of the rear axle 37 has a hexagonal shaft shape, and the hub cylinder portion 121 of the inner auxiliary wheel 120 is fitted on the hexagonal shaft portion 37 a of the rear axle 37.
  • the left and right rear wheels 4 include a hub cylinder 93 positioned at the center of rotation, an annular rim 90, a spoke 94 extending radially from the hub cylinder 93 and connecting the hub cylinder 93 and the rim 90. Further, a reinforcing plate portion 95 welded to the hub tube portion 93 and the spoke portion 94 is provided.
  • the rim portion 90 is formed with a rubber ring body 91, a plurality of plate-like propulsion lugs 92, and a plurality of protrusion-like outer peripheral lugs 96 by baking hard rubber around the rim portion 90.
  • Each propulsion lug 92 is formed on the rubber ring body 91 at appropriate intervals along the circumferential direction of the rubber ring body 91.
  • each propulsion lug 92 is inclined so that the outer peripheral side end side is positioned on the upstream side in the rotational direction when the traveling machine body 2 moves forward as compared with the inner peripheral side end side in a side view.
  • each propulsion lug 92 is inclined so as to be displaced to the upstream side in the rotational direction when the traveling machine body 2 moves forward as it moves away from the rotation center of the rim portion 90 in a side view.
  • 11 propulsion lugs 92 are arranged on the rubber ring 91 at equal intervals.
  • the hub cylinder portion 93 of the rear wheel 4 is fitted on the hexagonal shaft portion 37 a of the rear axle 37 at a position outside the hub cylinder portion 121 of the inner auxiliary wheel 120.
  • a cylindrical spacer member 126 is also fitted on the hexagonal shaft portion 37 a between the hub cylinder portion 121 of the inner auxiliary wheel 120 and the hub cylinder portion 93 of the rear wheel 4.
  • the hub cylinder portion 93 of the rear wheel 4 is fixed to the hexagonal shaft portion 37a of the rear axle 37 by the lock pin shaft 131 and the stop pin 132 so as not to be detached, thereby the hub cylinder portion 121 of the spacer member 126 and the inner auxiliary wheel 120.
  • the hexagonal shaft portion 37a of the rear axle 37 is held so as not to be detached.
  • a washer 133 having a diameter larger than the inner diameter of the hub cylinder portion 93 of the rear wheel 4 is fixed to the front end surface of the hexagonal shaft portion 37 a of the rear axle 37 by a bolt 134.
  • the extension axle 110 is bolted to the left and right outer surfaces of the reinforcing plate portion 95 of each rear wheel 4.
  • the extension axle 110 includes a flange portion 111 that is bolted to the reinforcing plate portion 95, an extension axle portion 112 that projects from the center of the left and right outer surfaces of the flange portion 111, the left and right outer surfaces of the flange portion 111, and the extension axle.
  • Three rib portions 113 welded to the base end portion of the portion 112 are provided.
  • the extension axle portion 112 is disposed on the same axis as the rear axle 37.
  • the distal end side (left and right outer sides) of the extension axle portion 112 is a hexagonal shaft portion 112a having a hexagonal shaft shape.
  • the basket wheel 100 is detachably attached to each rear wheel 4 via the extension axle 110.
  • Each cage wheel 100 includes a hub tube portion 101 located at the center of rotation, an annular rim portion 102, and four spoke portions that extend radially from the hub tube portion 101 and connect the hub tube portion 101 and the rim portion 102. 103, four reinforcing plate portions 104 welded to the hub cylinder portion 101 and the spoke portion 103, and a plurality of basket wheel lugs 105 provided on the rim portion 102 at appropriate intervals along the circumferential direction of the rim portion 102. .
  • the hub cylinder portion 101 of the cage wheel 100 is fitted on the tip side portion of the hexagonal shaft portion 112a of the extension axle 110.
  • the hub cylinder portion 101 is fixed to the hexagonal shaft portion 112a by a lock pin shaft 135 and a set pin 136 so as not to be detached.
  • a plurality of holes into which the lock pin shaft 135 can be inserted are formed in the axial direction at the tip side portion of the hexagonal shaft portion 112a.
  • the position in the axial direction of the cage wheel 100 with respect to the wheel 4 is configured to be selectable.
  • the number of the cage wheel lugs 105 is different from the number (11) of the propulsion lugs 92 of the rear wheel 4, and the rim portion 102 of the cage wheel 100 has ten plate-like cage wheel lugs 105.
  • Each cage wheel lug 105 is inclined so that the outer peripheral side end 105a side is positioned on the upstream side in the rotational direction when the traveling machine body 2 moves forward relative to the inner peripheral side end 105c side in a side view.
  • each cage wheel lug 105 is inclined so as to be displaced upstream in the rotational direction when the traveling machine body 2 moves forward as it moves away from the rotation center of the rim portion 102 in a side view.
  • each cage wheel lug 105 has a substantially S-shape when viewed from the side.
  • the outer peripheral side end portion 105a of the cage wheel lug 105 is bent toward the rotation center side of the rim portion 102 with respect to the lug central portion 105b, and the inclination angle ⁇ a of the outer peripheral side end portion 105a is the inclination angle ⁇ b of the lug central portion 105b. Bigger than.
  • the inner peripheral side end portion 105c of the cage wheel lug 105 is bent to the opposite side to the rotation center of the rim portion 102 with respect to the lug central portion 105b, and the inclination angle ⁇ c of the inner peripheral side end portion 105c It is larger than the inclination angle ⁇ b of the central portion 105b.
  • the outer peripheral end 105a and the inner peripheral end 105c are provided in parallel in a side view, and the inclination angle ⁇ a of the outer peripheral end 105a and the inclination angle ⁇ c of the inner peripheral end 105c are the same. . Since the outer peripheral end 105a and the inner peripheral end 105c of the cage wheel lug 105 are bent, the strength of the cage wheel lug 105 can be improved.
  • the cage wheel lug 105 is disposed away from the rear wheel 4. Thereby, a gap is provided between the rear wheel 4 and the cage wheel lug 105 (the cage wheel 100). Further, the width W 100 of the cage wheel lug 105 is wider than the width W 4 of the rear wheel and the width W 120 of the inner auxiliary wheel 120 in the rotation axis direction of the wheels 4 , 100 , 120 . The width W 120 of the inner auxiliary wheel 120 is narrower than the width W 4 of the rear wheels.
  • the width W 100 of the car wheel lug 105 is wider than the width W 120 of the width W 4 and inner auxiliary wheels 120 of the rear wheel 4 (Promotion lugs 92) Yes.
  • the width W 120 of the inner auxiliary wheel 120 is narrower than the width W 4 of the rear wheels.
  • the width W 100 of the cage wheel lug 105 is at least twice the width W 4 of the rear wheel, and is slightly wider than the seedling planting width Wp, as shown in FIG. Is set.
  • the outer diameter dimension D 100 (which may be referred to as a diameter) of the cage wheel 100 is set smaller than the outer diameter dimension D 4 of the rear wheel 4. That is, the cage wheel 100 is sized to fit on the inner diameter side of the rear wheel 4 in a side view. For this reason, the possibility that the car wheel 100 (particularly, the car wheel lug 105) may come into contact with the road surface during traveling on the road can be suppressed, and the traveling machine body 2 can smoothly travel on the road even when the car wheel 100 is attached.
  • outside dimension D 120 of inner auxiliary wheel 120 is identical to the outer diameter D 100 of the car wheel 100 can smoothly road in the traveling machine body 2 in a state of attaching the inner auxiliary wheels 120 .
  • the positions of the rim portions 102 on the left and right basket wheels 100 are set so that the movement trajectory of each rim portion 102 does not overlap the location of each planting claw 30 of the seedling planting device 23. .
  • the position of the rim portion 102 in the cage wheel 100 is set so that the movement trajectories of the left and right rim portions 102 do not overlap with the first and eighth planting claws 30 from the left in plan view. The Thereby, it can suppress that the influence of the roughness of the field scene by each rim part 102 reaches the seedling planting attitude
  • the plurality of basket wheel lugs 105 provided at appropriate intervals on the rim portion 90 do not roughen the farm scene so much that the movement trajectory of the cage wheel lugs 105 overlaps with the place of the planting claws 30 (planting position of the seedling).
  • the seedling can be transplanted in a good planting posture only by the leveling action of the leveling rotor 85.
  • the movement trajectories of the left and right rear wheels 4 and the inner auxiliary wheels 120 are also set so as not to overlap with the locations of the respective planting claws 30. The planting posture is suppressed.
  • FIG. 12 is a schematic diagram showing the movement trajectory of the cage wheel lug.
  • FIG. 12 shows a movement locus of the car wheel lug 105 of the left car wheel 100 among the left and right car wheels 100 when the wheel 4 travels without slipping.
  • the cage wheel lug 105 enters the soil 141 in the field, the cage wheel lug 105 takes a substantially horizontal posture and firmly holds the soil 141 to generate a large buoyancy. Further, the cage wheel lug 105 assumes a substantially vertical posture when ascending, rises almost directly from the soil 141, and does not hold the soil 141.
  • the rice transplanter 1 of this embodiment includes a cage wheel 100 that is detachably attached to a rear wheel 4 as a traveling wheel, and the cage wheel 100 is appropriately arranged along an annular rim portion 102 and a circumferential direction of the rim portion 102.
  • a plurality of basket wheel lugs 105 provided on the rim portion 102 at intervals are provided, and the cage wheel lugs 105 are upstream in the rotational direction when the traveling machine body 2 is advanced on the outer peripheral side end 105a side than on the inner peripheral side end 105c side.
  • the outer end 105a of the cage wheel lug 105 is bent toward the center of rotation of the rim 102.
  • the cage wheel lug 105 when the cage wheel lug 105 enters the soil of the farm field, the angle ⁇ a1 (see FIG. 12) formed by the outer periphery side end portion 105a of the cage wheel lug 105 and the cultivator 142 becomes smaller (the outer periphery side end). Therefore, the basket wheel lug 105 is less likely to enter the cultivator 142 in the field and the cultivator 142 is less likely to be cut. Further, the cage wheel lug 105 has an outer peripheral side end portion 105a bent toward the center of rotation of the rim portion 102, so that when the cage wheel lug 105 is raised, the traveling wheel body 2 is placed on the downstream surface in the rotational direction when the traveling machine body 2 moves forward. It becomes difficult to hold the soil.
  • the traveling machine body 2 sinks in a deep field or a clay-like field, or that the traveling machine body 2 sinks by turning the tiller 142 when turning, and the traveling machine body 2 is capable of running through the wet field with a simple configuration. Can be greatly improved. Moreover, since the outer peripheral side end part 105a is bent, the strength of the cage wheel lug 105 can be improved.
  • the rice transplanter 1 moves like scooping the cultivator on the three sides constituted by the rear wheel 4, the rim portion 102 of the cage wheel 100, and the cage wheel lug 105.
  • the cage wheel lug 105 is connected to or close to the rear wheel 4, the tiller is scooped and mud adheres to the cage wheel lug 105 or the like.
  • the cage wheel lug 105 is arranged away from the rear wheel 4 and the three sides are interrupted in the middle, so that the lifting of mud is small.
  • the width W 100 of the car wheel lug 105 is wider than the width W 4 of the rear wheel 4, it is 2 times or more the width W 4 of the rear wheel 4 for example Since it is wider than the planting width Wp (see FIG. 11), the buoyancy generated by the cage wheel lug 105 is greatly increased, and the sinking of the traveling machine body 2 can be suppressed in deep fields or clay fields.
  • the outside protrusion width Wo (refer FIG. 11) of the cage wheel 100 (cage wheel lug 105) with respect to the seedling planting position by the right and left outside planting claws 30 is narrower than the planting width Wp.
  • the outer protrusion width Wo of the cage wheel lug 105 of the cage wheel 100 attached to the left and right outside of the rear wheel 4 is: Compared with the connection of the seedling planting device 23 for eight-row planting, it becomes larger.
  • the outer protrusion width Wo is set to a value at which the basket wheel lug 105 does not step on the adjacent seedling.
  • the cage wheel 100 having the cage wheel lug 105 having a narrower width W 100 than the cage wheel lug 105 of the above embodiment is attached to the left and right rear wheels 4.
  • the rear wheel 4 includes a plurality of propulsion lugs 92 arranged at appropriate intervals along the circumferential direction of the rear wheel 4, and the number of the car wheel lugs 105 and the number of the propulsion lugs 92 are different. And the phase of the propulsion lug 92 can be shifted, so that mud does not easily accumulate between the car wheel lug 105 and the rear wheel 4, and the wetland running ability of the traveling machine body 2 can be improved. Moreover, in this embodiment, since the number of the cage wheel lugs 105 is smaller than the number of the propulsion lugs 92, in the cage wheel 100, the interval between the cage wheel lugs 105 adjacent in the circumferential direction of the rim portion 102 can be increased. Further, it is possible to improve the sludge removal of the cage wheel 100 which is easier to hold mud than the rear wheel 4.
  • the cage wheel 100 is attached to the rear wheel 4 via the extension axle 110, the cage wheel 100 can be firmly attached to the rear wheel 4.
  • the cage wheel 100 can be easily removed while being able to greatly improve the wettability of the traveling machine body 2.
  • the rice transplanter 1 when the rice transplanter 1 is mounted on a loading platform such as a truck, The rice transplanter 1 can be smoothly mounted without interfering with the tilt board or the ayumi board.
  • only the cage wheel 100 may be attached to the left and right outer sides of the rear wheel 4 without mounting the inner auxiliary wheel 120.
  • the rear portion of the traveling machine body 2 can be supported only by the cage wheel 100 and the inner auxiliary wheel 120.
  • the inclination angle ⁇ b of the outer peripheral side end 105a of the cage wheel lug 105 and the inclination angle ⁇ c of the inner peripheral end 105c are the same, but the outer peripheral end 105a.
  • the inclination angle ⁇ b of the inner peripheral side end portion 105c may be different from each other. Further, the inner peripheral side end portion 105 c may not be bent with respect to the lug center portion 105 b, or may be bent toward the rotation center side of the rim portion 102.
  • the inclination angle ⁇ a of the outer peripheral side end portion 105a and the inclination angle ⁇ c of the inner peripheral side end portion 105c of the cage wheel lug 105 are equal to the inclination angle ⁇ d of the propulsion lug 92 of the rear wheel 4 (see FIG. 10). It may be larger than the tilt angle ⁇ d or less. In this embodiment, the inclination angle ⁇ b of the lug center portion 105b is smaller than the inclination angle ⁇ d of the propulsion lug 92, but may be equal to or more than the inclination angle ⁇ d.
  • the left and right inner auxiliary wheels 120 are provided in order to obtain the buoyancy and propulsive force of the traveling machine body 2 in a deep field or a clay field. Since the outer peripheral lug 125 of the inner auxiliary wheel 120 is smaller than the propulsion lug 92 of the rear wheel 4 and the cage wheel lug 105 of the cage wheel 100, the mud repellency inside the rear wheel 4 where mud tends to accumulate is ensured. is doing. In addition, the structure which removes the inner side auxiliary wheel 120 and arrange
  • the present invention is not limited to the above-described embodiment, and can be embodied in various forms.
  • the configuration of each unit is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention. is there.
  • the present invention can be applied not only to a riding type rice transplanter but also to work vehicles such as various seedling transplanters that mainly work in paddy fields.
  • the variation of the front wheel 3 of the rice transplanter 1 can also be selected variously.
  • wide wheels may be used, or two normal front wheels 3 may be provided side by side on the left and right.
  • a dedicated cage wheel for example, a cage wheel having the same configuration as the cage wheel 100 may be attached to the left and right outer sides of the front wheel 3 as the traveling wheel.
  • the installation width with the field as the front wheel 3 can be expanded, which contributes to the improvement of wetland running ability.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Transplanting Machines (AREA)

Abstract

This working vehicle is provided with: a traveling wheel 4 for supporting a traveling machine body; and a cage wheel 100 removably mounted to the traveling wheel 4. The cage wheel 100 is provided with an annular rim 102 and a plurality of cage wheel lugs 105 provided to the rim 102 at appropriate intervals in the circumferential direction of the rim 102. The cage wheel lugs 105 are tilted in side view such that the outer peripheral end 105a side is located further on the upstream side in the rotational direction during the forward movement of the traveling machine body than the inner peripheral end 105c side. The outer peripheral ends 105a of the cage wheel lugs 105 are bent toward the center of rotation of the rim 102.

Description

作業車両Work vehicle
　本発明は、例えば農作業用の乗用型田植機のように、主として農作業に使用される作業車両に関するものである。 The present invention relates to a work vehicle mainly used for farm work such as a riding rice transplanter for farm work.
　近年の乗用型田植機の中には、圃場での走行性能向上のために車輪を追加配置したものがある。例えば特許文献１に記載の乗用型田植機では、後車輪の左右内側又は左右両側に、後車輪と一体回転する補助車輪を設けることによって、走行機体の湿田走破性向上を図っている。 Some recent paddy rice transplanters have additional wheels to improve running performance in the field. For example, in the riding type rice transplanter described in Patent Document 1, an auxiliary wheel that rotates integrally with the rear wheel is provided on the left and right inner sides or both left and right sides of the rear wheel, thereby improving the wetland running ability of the traveling machine body.
特開平７－３２９５０３号公報JP 7-329503 A
　しかし、補助車輪のラグの形状によっては、ラグが圃場の耕盤に突入してしまい、ラグが土を抱え込むことで、走行機体の湿田走破性が低下するという問題があった。作業車両の一例としての乗用型田植機においては、深い圃場や粘土質の圃場で走行機体が沈没したり旋回時に耕盤を壊して走行機体が沈没したりするという問題があり、市場からは更なる湿田走破性の向上が要求されている。 However, depending on the shape of the auxiliary wheel lug, the lug enters the field cultivator, and the rug entraps the soil, resulting in a problem that the wetland running ability of the traveling machine body is lowered. A riding rice transplanter as an example of a work vehicle has a problem that the traveling machine body sinks in a deep or clay-like field, or the traveling machine body sinks by breaking the cultivator during turning. There is a need for improved wetland running.
　本発明は、上記の現状に鑑みてなされたものであり、簡単な構成で走行機体の湿田走破性を更に向上させることを技術的課題としている。 The present invention has been made in view of the above-described present situation, and has a technical problem to further improve the wet field running performance of the traveling machine body with a simple configuration.
　本発明の作業車両は、走行機体を支持する一対の前車輪及び一対の走行車輪を備える作業車両であって、前記走行車輪に着脱自在に取り付けられるカゴ車輪を備え、前記カゴ車輪は、環状のリム部と、前記リム部の周方向に沿って適宜間隔で前記リム部に設けられた複数のカゴ車輪ラグを備え、前記カゴ車輪ラグは、側面視で、外周側端部側が内周側端部側よりも前記走行機体の前進時の回転方向上流側に位置するように傾斜しており、前記カゴ車輪ラグの外周側端部が前記リム部の回転中心側へ曲がっているものである。 A work vehicle according to the present invention is a work vehicle including a pair of front wheels and a pair of travel wheels that support a traveling machine body, and includes a basket wheel that is detachably attached to the travel wheel. A rim portion, and a plurality of cage wheel lugs provided on the rim portion at appropriate intervals along the circumferential direction of the rim portion, and the cage wheel lug has an inner peripheral side end on the outer peripheral side in a side view. It inclines so that it may be located in the rotation direction upstream side at the time of advance of the traveling machine body rather than the section side, and the outer peripheral side end of the cage wheel lug is bent toward the rotation center side of the rim section.
　本発明の作業車両において、前記カゴ車輪ラグは、前記走行車輪とは離間して配置されるようにしてもよい。 In the work vehicle of the present invention, the basket wheel lug may be arranged apart from the traveling wheel.
　また、本発明の作業車両は、前記走行車輪の回転軸方向において、前記カゴ車輪ラグの幅が前記走行車輪の幅よりも広くなっているようにしてもよい。 Further, the work vehicle of the present invention may be configured such that the width of the car wheel lug is wider than the width of the traveling wheel in the rotation axis direction of the traveling wheel.
　本発明の作業車両は、前記走行車輪に着脱自在に取り付けられるカゴ車輪を備え、前記カゴ車輪は、環状のリム部と、前記リム部の周方向に沿って適宜間隔で前記リム部に設けられた複数のカゴ車輪ラグを備え、前記カゴ車輪ラグは、側面視で、外周側端部側が内周側端部側よりも前記走行機体の前進時の回転方向上流側に位置するように傾斜しており、前記カゴ車輪ラグの外周側端部が前記リム部の回転中心側へ曲がっているようにした。これにより、カゴ車輪ラグの外周側端部と圃場の耕盤がなす角度がより小さくなるので、カゴ車輪ラグが圃場の耕盤に突入しにくくなるとともに耕盤を切りにくくなる。また、カゴ車輪ラグは、外周側端部が前記リム部の回転中心側へ曲がっていることで、カゴ車輪ラグの上昇時に、走行機体の前進時の回転方向下流側の面に土を抱えにくくなる。このため、深い圃場や粘土質の圃場で走行機体が沈没したり旋回時に耕盤を壊して走行機体が沈没したりするおそれを回避でき、簡単な構成で走行機体の湿田走破性の大幅な向上を図れる。また、カゴ車輪ラグは、外周側端部が曲がっているので、カゴ車輪ラグの強度を向上できる。 The work vehicle of the present invention includes a cage wheel that is detachably attached to the traveling wheel, and the cage wheel is provided on the rim portion at an appropriate interval along a circumferential direction of the annular rim portion and the rim portion. A plurality of basket wheel lugs, and the basket wheel lugs are inclined such that, in a side view, the outer peripheral side end portion is positioned upstream of the inner peripheral side end portion side in the rotational direction when the traveling machine body moves forward. The outer peripheral side end portion of the cage wheel lug is bent toward the rotation center side of the rim portion. Thereby, since the angle which the outer peripheral side edge part of a cage wheel lug and the cultivation board of a farm field make becomes smaller, it becomes difficult for a basket wheel lug to enter the cultivation board of an agricultural field, and to cut a cultivation board. In addition, the outer edge of the cage wheel lug is bent toward the center of rotation of the rim portion, so that when the cage wheel lug is raised, it is difficult to hold soil on the downstream surface in the rotational direction when the traveling machine body moves forward. Become. For this reason, it is possible to avoid the risk of the traveling aircraft sinking in a deep field or clayey field or breaking the tiller when turning, and drastically improving the wetland running performance of the traveling aircraft with a simple configuration. Can be planned. Moreover, since the outer peripheral side edge part of the cage wheel lug is bent, the strength of the cage wheel lug can be improved.
　本発明の作業車両において、前記カゴ車輪ラグは、前記走行車輪とは離間して配置されるようにすれば、泥の持ち上げが少なくなるため泥が付着しにくくなり、また、カゴ車輪ラグに付着した泥が落ちやすくなり、カゴ車輪ラグに泥が堆積しにくくなるので、泥抜けが良いカゴ車輪を実現でき、走行機体の湿田走破性を向上できる。 In the work vehicle according to the present invention, if the cage wheel lug is disposed away from the traveling wheel, the mud is less lifted and mud is less likely to adhere to the cage wheel lug. This makes it easier for mud to fall and makes it difficult for mud to accumulate on the car wheel lugs, so that a car wheel with good mud removal can be realized, and the running performance of the traveling machine can be improved.
　また、本発明の作業車両は、前記走行車輪の回転軸方向において、前記カゴ車輪ラグの幅が前記走行車輪の幅よりも広くなっているようにすれば、カゴ車輪ラグが発生させる浮力が大幅に増加するので、深い圃場や粘土質の圃場で走行機体の沈没を抑制できる。 In the work vehicle of the present invention, if the width of the car wheel lug is wider than the width of the running wheel in the rotation axis direction of the running wheel, the buoyancy generated by the car wheel lug is greatly increased. Therefore, the sinking of the traveling aircraft can be suppressed in deep fields and clay fields.
実施形態における乗用型田植機の左側面図である。It is a left view of the riding type rice transplanter in the embodiment. 乗用型田植機の平面図である。It is a top view of a riding type rice transplanter. エンジン、ミッションケース及びリヤアクスルケース等を示す左側面図である。It is a left view which shows an engine, a transmission case, a rear axle case, etc. エンジン、ミッションケース及びリヤアクスルケース等を示す平面図である。It is a top view which shows an engine, a transmission case, a rear axle case, etc. 乗用型田植機の駆動系統図である。It is a drive system figure of a riding type rice transplanter. カゴ車輪、後車輪及び内側補助車輪の左側面図である。It is a left view of a cage wheel, a rear wheel, and an inner side auxiliary wheel. 図６のＡ－Ａ線位置での断面図である。FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6. カゴ車輪、後車輪及び内側補助車輪の斜視図である。It is a perspective view of a basket wheel, a rear wheel, and an inside auxiliary wheel. カゴ車輪、後車輪及び内側補助車輪の分離斜視図である。It is a separation perspective view of a basket wheel, a rear wheel, and an inside auxiliary wheel. カゴ車輪及び後車輪を拡大して示す左側面図である。It is a left view which expands and shows a cage wheel and a rear wheel. カゴ車輪と植付爪との位置関係を示す平面図である。It is a top view which shows the positional relationship of a cage wheel and a planting nail | claw. カゴ車輪ラグの移動軌跡を示す模式図である。It is a schematic diagram which shows the movement locus | trajectory of a cage wheel lug.
　以下に、本発明を具体化した実施形態を、８条植え式の乗用型田植機１（以下、単に田植機１という）に適用した場合の図面に基づいて説明する。なお、以下の説明では、走行機体２の進行方向に向かって左側を単に左側と称し、同じく進行方向に向かって右側を単に右側と称する。 Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings in the case of applying to an eight-row planting type rice transplanter 1 (hereinafter simply referred to as rice transplanter 1). In the following description, the left side in the traveling direction of the traveling machine body 2 is simply referred to as the left side, and the right side in the traveling direction is also simply referred to as the right side.
　まず、図１～図４を参照しながら、田植機１の概要について説明する。実施形態の田植機１は、走行車輪としての左右一対の前車輪３及び同じく左右一対の後車輪４によって支持された走行機体２を備えている。走行機体２の前部にはエンジン５が搭載されている。エンジン５からの動力を後方のミッションケース６に伝達して、前車輪３及び後車輪４を駆動させることにより、走行機体２が前後進走行するように構成されている。ミッションケース６の左右側方にフロントアクスルケース７を突出させ、フロントアクスルケース７から左右外向きに延びる前車軸３６に前車輪３が舵取り可能に取り付けられている。ミッションケース６の後方に筒状フレーム８を突出させ、筒状フレーム８の後端側にリヤアクスルケース９を固設し、リヤアクスルケース９から左右外向きに延びる後車軸３７に後車輪４が取り付けられている。 First, the outline of the rice transplanter 1 will be described with reference to FIGS. The rice transplanter 1 according to the embodiment includes a traveling machine body 2 supported by a pair of left and right front wheels 3 and a pair of left and right rear wheels 4 as traveling wheels. An engine 5 is mounted on the front portion of the traveling machine body 2. Power from the engine 5 is transmitted to the rear transmission case 6 to drive the front wheels 3 and the rear wheels 4 so that the traveling machine body 2 travels forward and backward. A front axle case 7 projects from the left and right sides of the transmission case 6, and the front wheels 3 are attached to a front axle 36 extending from the front axle case 7 to the left and right so as to be steerable. A cylindrical frame 8 protrudes behind the transmission case 6, a rear axle case 9 is fixed to the rear end side of the cylindrical frame 8, and the rear wheel 4 is attached to a rear axle 37 that extends outward from the rear axle case 9 to the left and right. ing.
　図１及び図２に示されるように、走行機体２の前部及び中央部の上面側には、オペレータ搭乗用の作業ステップ（車体カバー）１０が設けられている。作業ステップ１０の前部の上方にはフロントボンネット１１が配置され、フロントボンネット１１の内部にエンジン５を設置している。作業ステップ１０の上面のうちフロントボンネット１１の後部側方に、足踏み操作用の走行変速ペダル１２が配置されている。詳細は省略するが、実施形態の田植機１は、走行変速ペダル１２の踏み込み量に応じた変速電動モータの駆動にて、ミッションケース６の油圧無段変速機４０から出力される変速動力を調節するように構成されている。 As shown in FIG. 1 and FIG. 2, an operator boarding work step (vehicle body cover) 10 is provided on the upper surface side of the front part and the central part of the traveling machine body 2. A front bonnet 11 is disposed above the front part of the work step 10, and the engine 5 is installed inside the front bonnet 11. A traveling speed change pedal 12 for stepping operation is disposed on the upper side of the work step 10 on the rear side of the front bonnet 11. Although details are omitted, the rice transplanter 1 according to the embodiment adjusts the shift power output from the hydraulic continuously variable transmission 40 of the transmission case 6 by driving the variable speed electric motor according to the depression amount of the travel shift pedal 12. Is configured to do.
　また、フロントボンネット１１の後部上面側にある運転操作部１３には、操縦ハンドル１４と走行主変速レバー（図示省略照）と昇降操作具としての作業レバー１６とが設けられている。作業ステップ１０の上面のうちフロントボンネット１１の後方には、シートフレーム１７を介して操縦座席１８が配置されている。なお、フロントボンネット１１の左右側方には、作業ステップ１０を挟んで左右の予備苗載台２４が設けられている。 Further, a steering handle 14, a traveling main transmission lever (not shown), and a work lever 16 as a lifting operation tool are provided on the driving operation unit 13 on the rear upper surface side of the front bonnet 11. A steering seat 18 is disposed via a seat frame 17 behind the front bonnet 11 on the upper surface of the work step 10. Note that 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.
　走行機体２の後端部にリンクフレーム１９を立設する。リンクフレーム１９には、ロワーリンク２０及びトップリンク２１からなる昇降リンク機構２２を介して、８条植え用の苗植付装置２３が昇降可能に連結されている。この場合、苗植付装置２３の前面側に、ローリング支点軸（図示省略）を介してヒッチブラケット３８を設けている。昇降リンク機構２２の後部側にヒッチブラケット３８を連結することによって、走行機体２の後方に苗植付装置２３を昇降動可能に配置している。筒状フレーム８の上面後部に、油圧式の昇降シリンダ３９のシリンダ基端側を上下回動可能に支持させる。昇降シリンダ３９のロッド先端側はロワーリンク２０に連結している。昇降シリンダ３９の伸縮動にて昇降リンク機構２２を上下回動させる結果、苗植付装置２３が昇降動する。なお、苗植付装置２３は前記ローリング支点軸回りに回動して左右方向の傾斜姿勢を変更可能に構成している。 The link frame 19 is erected at the rear end of the traveling machine body 2. An eight-row seedling planting device 23 is connected to the link frame 19 via an elevating link mechanism 22 including a lower link 20 and a top link 21 so as to be elevable. In this case, a hitch bracket 38 is provided on the front side of the seedling planting device 23 via a rolling fulcrum shaft (not shown). By connecting a hitch bracket 38 to the rear side of the lifting link mechanism 22, the seedling planting device 23 is disposed behind the traveling machine body 2 so as to be movable up and down. The cylinder base end side of the hydraulic lift cylinder 39 is supported on the rear upper surface of the cylindrical frame 8 so as to be vertically rotatable. The rod tip side of the lifting cylinder 39 is connected to the lower link 20. As a result of vertically moving the lifting link mechanism 22 by the expansion and contraction of the lifting cylinder 39, the seedling planting device 23 moves up and down. Note that the seedling planting device 23 is configured to be rotatable about the rolling fulcrum axis so as to be able to change the inclined posture in the left-right direction.
　オペレータは、作業ステップ１０の側方にある乗降ステップ２５から作業ステップ１０上に搭乗し、運転操作にて圃場内を移動しながら、苗植付装置２３を駆動させて圃場に苗を植え付ける苗植え作業（田植え作業）を実行する。なお、苗植え作業中において、苗植付装置２３には、予備苗載台２４上の苗マットをオペレータが随時補給する。 The operator gets on the work step 10 from the boarding / alighting step 25 on the side of the work step 10 and drives the seedling planting device 23 to move the seedling planting device 23 and move the seedling planting in the field while moving in the field by the driving operation. Perform work (rice planting work). During the seedling planting operation, the operator replenishes the seedling planting device 23 with a seedling mat on the preliminary seedling mounting table 24 as needed.
　図１及び図２に示すように、苗植付装置２３は、エンジン５からミッションケース６を経由した動力が伝達される植付入力ケース２６と、植付入力ケース２６に連結する八条用四組（二条で一組）の植付伝動ケース２７と、各植付伝動ケース２７の後端側に設けられた苗植機構２８と、八条植え用の苗載台２９と、各植付伝動ケース２７の下面側に配置された圃場面均平用のフロート３２とを備えている。苗植機構２８には、一条分二本の植付爪３０を有するロータリケース３１が設けられている。植付伝動ケース２７に二条分のロータリケース３１が配置されている。ロータリケース３１の一回転によって、二本の植付爪３０が各々一株ずつの苗を切り取ってつかみ、フロート３２にて整地された圃場面に植え付ける。苗植付装置２３の前面側には、圃場面を均す（整地する）整地ロータ８５を昇降動可能に設けている。 As shown in FIGS. 1 and 2, the seedling planting device 23 includes a planting input case 26 to which power is transmitted from the engine 5 via the mission case 6, and four sets of eight strips connected to the planting input case 26. Planting transmission case 27 (one set in Nijo), seedling planting mechanism 28 provided on the rear end side of each planting transmission case 27, seedling mount 29 for eight-row planting, and each planting transmission case 27 And a float 32 for leveling the farm scene disposed on the lower surface side of the head. The seedling planting mechanism 28 is provided with a rotary case 31 having two planting claws 30 for one line. Two rotary cases 31 are arranged in the planting transmission case 27. By one rotation of the rotary case 31, the two planting claws 30 cut out and hold one seedling each and plant it in a field scene leveled by the float 32. On the front side of the seedling planting device 23, a leveling rotor 85 for leveling (leveling) the farm scene is provided so as to be movable up and down.
　詳細は後述するが、エンジン５からミッションケース６を経由した動力は、前車輪３及び後車輪４に伝達されるだけでなく、苗植付装置２３の植付入力ケース２６にも伝達される。この場合、ミッションケース６から苗植付装置２３に向かう動力は、リヤアクスルケース９の右側上部に設けられた株間変速ケース７５に一旦伝達され、株間変速ケース７５から植付入力ケース２６に動力伝達される。当該伝達された動力にて、各苗植機構２８や苗載台２９が駆動する。株間変速ケース７５には、植え付けられる苗の株間を例えば疎植、標準植又は密植等に切り換える株間変速機構７６と、苗植付装置２３への動力伝達を継断する植付クラッチ７７とが内蔵されている（図５参照）。 Although details will be described later, the power from the engine 5 via the transmission case 6 is transmitted not only to the front wheels 3 and the rear wheels 4 but also to the planting input case 26 of the seedling planting device 23. In this case, the power from the transmission case 6 toward the seedling planting device 23 is once transmitted to the inter-plant transmission case 75 provided on the upper right side of the rear axle case 9, and is transmitted from the inter-plant transmission case 75 to the planting input case 26. The The seedling planting mechanism 28 and the seedling mount 29 are driven by the transmitted power. The inter-strain shifting case 75 includes an inter-strain shifting mechanism 76 that switches between planted seedlings to, for example, sparse planting, standard planting, or dense planting, and a planting clutch 77 that interrupts power transmission to the planting planting device 23. (See FIG. 5).
　なお、苗植付装置２３の左右外側にはサイドマーカ３３を備えている。サイドマーカ３３は、筋引き用のマーカ輪体３４と、マーカ輪体３４を回転可能に軸支するマーカアーム３５とを有している。各マーカアーム３５の基端側が苗植付装置２３の左右外側に左右回動可能に軸支されている。サイドマーカ３３は、運転操作部１３にある作業レバー１６の操作に基づき、次工程での基準となる軌跡を圃場面に着地して形成する作業姿勢と、マーカ輪体３４を上昇させて圃場面から離間させた非作業姿勢とに回動可能に構成されている。 A side marker 33 is provided on the left and right outside of the seedling planting device 23. The side marker 33 includes a marker ring body 34 for muscle pulling and a marker arm 35 that pivotally supports the marker ring body 34 so as to be rotatable. The base end side of each marker arm 35 is pivotally supported on the left and right outer sides of the seedling planting device 23 so as to be rotatable left and right. The side marker 33 raises the marker wheel body 34 by raising the work posture and the working posture that forms the locus that becomes the reference in the next process on the farm scene based on the operation of the work lever 16 in the driving operation unit 13. It is comprised so that it can rotate to the non-working posture separated from.
　図３及び図４に示すように、走行機体２は前後に延びる左右一対の機体フレーム５０を備えている。各機体フレーム５０は前部フレーム５１と後部フレーム５２とに二分割されている。前部フレーム５１の後端部と後部フレーム５２の前端部とが左右横長の中間連結フレーム５３に溶接固定されている。左右一対の前部フレーム５１の前端部は前フレーム５４に溶接固定されている。左右一対の後部フレーム５２の後端側は後フレーム５５に溶接固定されている。前フレーム５４、左右両前部フレーム５１及び中間連結フレーム５３は平面視四角枠状に構成されている。同様に、中間連結フレーム５３、左右両後部フレーム５２及び後フレーム５５も平面視四角枠状に構成されている。 3 and 4, the traveling machine body 2 includes a pair of left and right machine body frames 50 extending in the front-rear direction. Each body frame 50 is divided into a front frame 51 and a rear frame 52. The rear end portion of the front frame 51 and the front end portion of the rear frame 52 are welded and fixed to a laterally long intermediate connection frame 53. The front ends of the pair of left and right front frames 51 are fixed to the front frame 54 by welding. The rear end sides of the left and right rear frames 52 are fixed to the rear frame 55 by welding. The front frame 54, the left and right front frames 51, and the intermediate connection frame 53 are configured in a square frame shape in plan view. Similarly, the intermediate connection frame 53, the left and right rear frames 52, and the rear frame 55 are also configured in a square frame shape in plan view.
　図４に示すように、左右両前部フレーム５１の前寄り部位は、前後二本のベースフレーム５６によって連結されている。当該各ベースフレーム５６の中間部は、左右両前部フレーム５１よりも低く位置するようにＵ字形に折り曲げられた形状に形成されている。各ベースフレーム５６の左右端部は、対応する前部フレーム５１に溶接固定されている。略平板状のエンジン台５７及び複数の防振ゴム（図示省略）を介して、前後両ベースフレーム５６にエンジン５が搭載され防振支持されている。後側のベースフレーム５６は、後中継ブラケット６０を介してミッションケース６の前部に連結されている。 As shown in FIG. 4, the front portions of the left and right front frames 51 are connected by two front and rear base frames 56. An intermediate portion of each base frame 56 is formed in a shape bent into a U shape so as to be positioned lower than the left and right front frames 51. The left and right end portions of each base frame 56 are fixed to the corresponding front frame 51 by welding. The engine 5 is mounted on and supported by the front and rear base frames 56 via a substantially flat engine stand 57 and a plurality of vibration isolating rubbers (not shown). The rear base frame 56 is connected to the front portion of the transmission case 6 via the rear relay bracket 60.
　図４から分かるように、左右両前部フレーム５１の後寄り部位は、ミッションケース６の左右両側に突出したフロントアクスルケース７に連結されている。中間連結フレーム５３の中央側には、側面視で後斜め下向きに延びるＵ字状フレーム６１の左右両端部が溶接固定されている。Ｕ字状フレーム６１の中間部がミッションケース６とリヤアクスルケース９とをつなぐ筒状フレーム８の中途部に連結されている（図３及び図４参照）。後フレーム５５の中間部には、左右二本の縦フレーム６２の上端側が溶接固定されている。左右両縦フレーム６２の下端側には左右横長のリヤアクスル支持フレーム６３の中間部が溶接固定されている。リヤアクスル支持フレーム６３の左右両端部がリヤアクスルケース９に連結されている。なお、左側の前部フレーム５１に外向き突設されたステップ支持台６４の下方に、エンジン５の排気音を低減させるマフラー６５が配置されている。 As can be seen from FIG. 4, the rear portions of the left and right front frames 51 are connected to a front axle case 7 protruding from the left and right sides of the mission case 6. The left and right ends of a U-shaped frame 61 extending rearward and obliquely downward in a side view are welded and fixed to the center side of the intermediate connection frame 53. The middle part of the U-shaped frame 61 is connected to the middle part of the cylindrical frame 8 that connects the transmission case 6 and the rear axle case 9 (see FIGS. 3 and 4). The upper end sides of the left and right vertical frames 62 are welded and fixed to the middle portion of the rear frame 55. An intermediate portion of a laterally long rear axle support frame 63 is fixed by welding to the lower ends of the left and right vertical frames 62. The left and right ends of the rear axle support frame 63 are connected to the rear axle case 9. A muffler 65 for reducing the exhaust noise of the engine 5 is disposed below the step support base 64 projecting outward from the left front frame 51.
　図３及び図４に示すように、エンジン５の後方に配置されたミッションケース６の前部には、パワーステアリングユニット６６が設けられている。詳細は省略するが、パワーステアリングユニット６６の上面に立設されるハンドルポストの内部にハンドル軸が回動可能に配置される。ハンドル軸の上端側に操縦ハンドル１４が固定されている。パワーステアリングユニット６６の下面側には操舵出力軸（図示省略）が下向きに突出している。当該操舵出力軸には、左右の前車輪３を操舵する操舵杆６８（図４参照）がそれぞれ連結されている。 As shown in FIGS. 3 and 4, a power steering unit 66 is provided in the front part of the mission case 6 disposed behind the engine 5. Although details are omitted, a handle shaft is rotatably disposed inside a handle post erected on the upper surface of the power steering unit 66. A steering handle 14 is fixed to the upper end side of the handle shaft. On the lower surface side of the power steering unit 66, a steering output shaft (not shown) protrudes downward. A steering rod 68 (see FIG. 4) for steering the left and right front wheels 3 is connected to the steering output shaft.
　実施形態のエンジン５は、出力軸７０（クランク軸）を左右方向に向けて前後両ベースフレーム５６の中間部上に配置されている。エンジン５及びエンジン台５７の左右幅は左右両前部フレーム５１間の内法寸法よりも小さく、エンジン５の下部側及びエンジン台５７は、前後両ベースフレーム５６の中間部上に配置された状態で、左右両前部フレーム５１よりも下側に露出している。この場合、エンジン５の出力軸７０（軸線）は、側面視で左右両前部フレーム５１と重なる位置にある。エンジン５の左右一側面（実施形態では左側面）には、エンジン５の排気系に連通する排気管６９が配置されている。排気管６９の基端側がエンジン５の各気筒に接続され、排気管６９の先端側がマフラー６５の排気入口側に接続されている。 The engine 5 of the embodiment is disposed on an intermediate portion of the front and rear base frames 56 with the output shaft 70 (crank shaft) directed in the left-right direction. The left and right widths of the engine 5 and the engine stand 57 are smaller than the inner dimensions between the left and right front frames 51, and the lower side of the engine 5 and the engine stand 57 are disposed on the middle part of the front and rear base frames 56. Thus, it is exposed below the left and right front frames 51. In this case, the output shaft 70 (axis line) of the engine 5 is in a position overlapping the left and right front frames 51 in a side view. An exhaust pipe 69 communicating with the exhaust system of the engine 5 is disposed on one of the left and right side surfaces (left side surface in the embodiment) of the engine 5. The proximal end side of the exhaust pipe 69 is connected to each cylinder of the engine 5, and the distal end side of the exhaust pipe 69 is connected to the exhaust inlet side of the muffler 65.
　次に、図５を参照しながら、田植機１の駆動系統について説明する。エンジン５の出力軸７０はエンジン５の左右両側面から外向きに突出している。出力軸７０のうちエンジン５左側面から突出した突端部にエンジン出力プーリ７２を設け、ミッションケース６から左外側に突出したミッション入力軸７１にミッション入力プーリ７３を設け、両プーリ７２，７３に伝達ベルトを巻き掛けている。両プーリ７２，７３及び伝達ベルトを介して、エンジン５からミッションケース６に動力伝達する。 Next, the drive system of the rice transplanter 1 will be described with reference to FIG. The output shaft 70 of the engine 5 protrudes outward from the left and right side surfaces of the engine 5. An engine output pulley 72 is provided at the protruding end of the output shaft 70 that protrudes from the left side of the engine 5, a mission input pulley 73 is provided at the mission input shaft 71 that protrudes outward from the mission case 6, and is transmitted to both pulleys 72, 73. A belt is wrapped around. Power is transmitted from the engine 5 to the transmission case 6 via both pulleys 72 and 73 and a transmission belt.
　ミッションケース６内には、油圧ポンプ４０ａ及び油圧モータ４０ｂからなる油圧無段変速機４０、遊星歯車装置４１、油圧無段変速機４０及び遊星歯車装置４１を経由した変速動力を複数段に変速する歯車式副変速機構４２、遊星歯車装置４１から歯車式副変速機構４２への動力伝達を継断する主クラッチ４３、並びに、歯車式副変速機構４２からの出力を制動させる走行ブレーキ４４等を備えている。ミッション入力軸７１からの動力で油圧ポンプ４０ａを駆動させ、油圧ポンプ４０ａから油圧モータ４０ｂに作動油を供給し、油圧モータ４０ｂから変速動力が出力される。油圧モータ４０ｂの変速動力は、遊星歯車装置４１及び主クラッチ４３を介して歯車式副変速機構４２に伝達される。そして、歯車式副変速機構４２から、前後車輪３，４と苗植付装置２３との二方向に分岐して動力伝達される。 In the transmission case 6, the transmission power through the hydraulic continuously variable transmission 40, the planetary gear device 41, the hydraulic continuously variable transmission 40, and the planetary gear device 41 including the hydraulic pump 40 a and the hydraulic motor 40 b is shifted to a plurality of stages. A gear-type sub-transmission mechanism 42, a main clutch 43 that interrupts power transmission from the planetary gear unit 41 to the gear-type sub-transmission mechanism 42, a traveling brake 44 that brakes the output from the gear-type sub-transmission mechanism 42, and the like. ing. The hydraulic pump 40a is driven by power from the mission input shaft 71, hydraulic oil is supplied from the hydraulic pump 40a to the hydraulic motor 40b, and variable speed power is output from the hydraulic motor 40b. The speed change power of the hydraulic motor 40 b is transmitted to the gear type subtransmission mechanism 42 via the planetary gear device 41 and the main clutch 43. Then, power is transmitted from the gear-type sub-transmission mechanism 42 by branching in the two directions of the front and rear wheels 3 and 4 and the seedling planting device 23.
　前後車輪３，４に向かう分岐動力の一部は、歯車式副変速機構４２から差動歯車機構４５を介して、フロントアクスルケース７の前車軸３６に伝達され、左右前車輪３を回転駆動させる。前後車輪３，４に向かう分岐動力の残りは、歯車式副変速機構４２から、自在継手軸４６、リヤアクスルケース９内のリヤ駆動軸４７、左右一対の摩擦クラッチ４８及び歯車式伝動機構４９を介して、リヤアクスルケース９の後車軸３７に伝達され、左右後車輪４を回転駆動させる。走行ブレーキ４４を作動させた場合は、歯車式副変速機構４２からの出力がなくなるので、前後車輪３，４共にブレーキがかかる。また、田植機１を旋回させる場合は、リヤアクスルケース９内の旋回内側の摩擦クラッチ４８を切り作動させて旋回内側の後車輪４を自由回転させ、動力伝達される旋回外側の後車輪４の回転駆動によって旋回する。 Part of the branching power toward the front and rear wheels 3 and 4 is transmitted from the gear-type auxiliary transmission mechanism 42 via the differential gear mechanism 45 to the front axle 36 of the front axle case 7 to drive the left and right front wheels 3 to rotate. . The remainder of the branching power toward the front and rear wheels 3, 4 is transmitted from the gear-type sub-transmission mechanism 42 through the universal joint shaft 46, the rear drive shaft 47 in the rear axle case 9, a pair of left and right friction clutches 48, and a gear-type transmission mechanism 49. Thus, the rear axle case 9 is transmitted to the rear axle 37 to drive the left and right rear wheels 4 to rotate. When the traveling brake 44 is operated, the output from the gear-type subtransmission mechanism 42 is lost, so that the front and rear wheels 3 and 4 are braked. When the rice transplanter 1 is turned, the friction clutch 48 inside the turning inside the rear axle case 9 is turned off to rotate the rear wheel 4 inside the turning freely, and the rotation of the rear wheel 4 outside the turning to which power is transmitted is rotated. It turns by driving.
　リヤアクスルケース９内には、整地ロータ８５への動力継断用の整地ロータクラッチを有するロータ駆動ユニット８６を備えている。歯車式副変速機構４２から自在継手軸４６に伝達された動力はロータ駆動ユニット８６にも分岐して伝達され、ロータ駆動ユニット８６から自在継手軸８７を介して整地ロータ８５に動力伝達される。整地ロータ８５の回転駆動によって圃場面が均される。 In the rear axle case 9, a rotor drive unit 86 having a leveling rotor clutch for power transmission to the leveling rotor 85 is provided. The power transmitted from the gear-type subtransmission mechanism 42 to the universal joint shaft 46 is also branched and transmitted to the rotor drive unit 86, and is transmitted from the rotor drive unit 86 to the leveling rotor 85 via the universal joint shaft 87. The farm scene is leveled by the rotational drive of the leveling rotor 85.
　苗植付装置２３に向かう分岐動力は、自在継手軸付きのＰＴＯ伝動軸機構７４を介して株間変速ケース７５に伝達される。株間変速ケース７５内には、植え付けられる苗の株間を例えば疎植、標準植又は密植等に切り換える株間変速機構７６と、苗植付装置２３への動力伝達を継断する植付クラッチ７７とを備えている。株間変速ケース７５に伝達された動力は、株間変速機構７６、植付クラッチ７７及び自在継手軸７８を介して植付入力ケース２６に伝達される。 The branching power toward the seedling planting device 23 is transmitted to the inter-stock transmission case 75 via the PTO transmission shaft mechanism 74 with a universal joint shaft. In the inter-strain shifting case 75, an inter-strain shifting mechanism 76 that switches between seedlings to be planted, for example, to sparse planting, standard planting, or dense planting, and a planting clutch 77 that interrupts power transmission to the planting planting device 23 I have. The power transmitted to the inter-plant transmission case 75 is transmitted to the planting input case 26 via the inter-plant transmission mechanism 76, the planting clutch 77, and the universal joint shaft 78.
　植付入力ケース２６内には、苗載台を横送り移動させる横送り機構７９と、苗載台２９上の苗マットを縦送り搬送させる苗縦送り機構８０と、植付入力ケース２６から各植付伝動ケース２７に動力伝達する植付出力軸８１とを備えている。植付入力ケース２６に伝達された動力によって、横送り機構７９及び苗縦送り機構８０が駆動し、苗載台２９を連続的に往復で横送り移動させ、苗載台２９が往復移動端（往復移動の折返し点）に到達したときに苗載台２９上の苗マットを間欠的に縦送り搬送する。植付入力ケース２６から植付出力軸８１を経由した動力は各植付伝動ケース２７に伝達され、各植付伝動ケース２７のロータリケース３１並びに植付爪３０を回転駆動させる。なお、施肥装置を設ける場合は株間変速ケース７５から施肥装置に動力伝達される。 In the planting input case 26, a horizontal feed mechanism 79 that moves the seedling platform laterally, a seedling vertical feed mechanism 80 that transports the seedling mat on the seedling platform 29 vertically, and the planting input case 26. A planting output shaft 81 that transmits power to the planting transmission case 27 is provided. By the power transmitted to the planting input case 26, the lateral feed mechanism 79 and the seedling vertical feed mechanism 80 are driven, and the seedling stage 29 is continuously reciprocally moved in the lateral direction. The seedling mat on the seedling table 29 is intermittently transported vertically when reaching the turning point of the reciprocating movement. Power from the planting input case 26 via the planting output shaft 81 is transmitted to each planting transmission case 27, and the rotary case 31 and the planting claw 30 of each planting transmission case 27 are driven to rotate. In addition, when providing a fertilizer, motive power is transmitted from the inter-strain transmission case 75 to a fertilizer.
　次に、図１、図４及び図６以降を参照しながら、カゴ車輪１００、走行車輪としての後車輪４及び内側補助車輪１２０の詳細構造について説明する。この実施形態の田植機１では、左右内側から順に、内側補助車輪１２０、後車輪４、カゴ車輪１００が配置される。 Next, the detailed structure of the cage wheel 100, the rear wheel 4 as the traveling wheel, and the inner auxiliary wheel 120 will be described with reference to FIG. 1, FIG. 4, and FIG. In the rice transplanter 1 of this embodiment, the inner auxiliary wheel 120, the rear wheel 4, and the cage wheel 100 are arranged in order from the left and right inner sides.
　左右の内側補助車輪１２０は、回転中心部に位置するハブ筒部１２１と、環状のリム部１２２と、ハブ筒部１２１から放射状に延びてハブ筒部１２１とリム部１２２とをつなぐスポーク部１２３とを備えている。リム部１２２には、周囲に硬質ゴムを焼き付けることによって、ゴム輪体１２４と突起状の複数の外周ラグ１２５が形成されている。後車軸３７の先端側（左右外側）は六角軸形状になっていて、後車軸３７の六角軸部３７ａに内側補助車輪１２０のハブ筒部１２１が被嵌される。 The left and right inner auxiliary wheels 120 include a hub cylinder 121 located at the center of rotation, an annular rim 122, and a spoke 123 that extends radially from the hub cylinder 121 and connects the hub cylinder 121 and the rim 122. And. The rim portion 122 is formed with a rubber ring body 124 and a plurality of protruding outer peripheral lugs 125 by baking hard rubber around the rim portion 122. The front end side (left and right outer sides) of the rear axle 37 has a hexagonal shaft shape, and the hub cylinder portion 121 of the inner auxiliary wheel 120 is fitted on the hexagonal shaft portion 37 a of the rear axle 37.
　左右の後車輪４は、回転中心部に位置するハブ筒部９３と、環状のリム部９０と、ハブ筒部９３から放射状に延びてハブ筒部９３とリム部９０とをつなぐスポーク部９４と、ハブ筒部９３及びスポーク部９４に溶接された補強板部９５を備えている。リム部９０には、周囲に硬質ゴムを焼き付けることによって、ゴム輪体９１と、板状の複数の推進ラグ９２と、突起状の複数の外周ラグ９６が形成されている。各推進ラグ９２は、ゴム輪体９１の周方向に沿って適宜間隔でゴム輪体９１に形成されている。また、各推進ラグ９２は、側面視で、外周側端部側が内周側端部側よりも走行機体２の前進時の回転方向上流側に位置するように傾斜している。言い換えれば、各推進ラグ９２は、側面視で、リム部９０の回転中心から離れるに従って走行機体２の前進時の回転方上流側へ変位するように傾斜している。この実施形態では、１１個の推進ラグ９２がゴム輪体９１に等間隔に配置されている。 The left and right rear wheels 4 include a hub cylinder 93 positioned at the center of rotation, an annular rim 90, a spoke 94 extending radially from the hub cylinder 93 and connecting the hub cylinder 93 and the rim 90. Further, a reinforcing plate portion 95 welded to the hub tube portion 93 and the spoke portion 94 is provided. The rim portion 90 is formed with a rubber ring body 91, a plurality of plate-like propulsion lugs 92, and a plurality of protrusion-like outer peripheral lugs 96 by baking hard rubber around the rim portion 90. Each propulsion lug 92 is formed on the rubber ring body 91 at appropriate intervals along the circumferential direction of the rubber ring body 91. Further, each propulsion lug 92 is inclined so that the outer peripheral side end side is positioned on the upstream side in the rotational direction when the traveling machine body 2 moves forward as compared with the inner peripheral side end side in a side view. In other words, each propulsion lug 92 is inclined so as to be displaced to the upstream side in the rotational direction when the traveling machine body 2 moves forward as it moves away from the rotation center of the rim portion 90 in a side view. In this embodiment, 11 propulsion lugs 92 are arranged on the rubber ring 91 at equal intervals.
　後車輪４のハブ筒部９３は、内側補助車輪１２０のハブ筒部１２１よりも外側の位置で、後車軸３７の六角軸部３７ａに被嵌される。六角軸部３７ａには、内側補助車輪１２０のハブ筒部１２１と後車輪４のハブ筒部９３の間で、筒状のスペーサ部材１２６も被嵌される。後車輪４のハブ筒部９３が後車軸３７の六角軸部３７ａにロックピン軸１３１と止めピン１３２とで抜け不能に固定されることによって、スペーサ部材１２６及び内側補助車輪１２０のハブ筒部１２１も後車軸３７の六角軸部３７ａに抜け不能に保持される。後車軸３７の六角軸部３７ａの先端面には、後車輪４のハブ筒部９３の内径よりも大径の座金１３３がボルト１３４により固定される。 The hub cylinder portion 93 of the rear wheel 4 is fitted on the hexagonal shaft portion 37 a of the rear axle 37 at a position outside the hub cylinder portion 121 of the inner auxiliary wheel 120. A cylindrical spacer member 126 is also fitted on the hexagonal shaft portion 37 a between the hub cylinder portion 121 of the inner auxiliary wheel 120 and the hub cylinder portion 93 of the rear wheel 4. The hub cylinder portion 93 of the rear wheel 4 is fixed to the hexagonal shaft portion 37a of the rear axle 37 by the lock pin shaft 131 and the stop pin 132 so as not to be detached, thereby the hub cylinder portion 121 of the spacer member 126 and the inner auxiliary wheel 120. Also, the hexagonal shaft portion 37a of the rear axle 37 is held so as not to be detached. A washer 133 having a diameter larger than the inner diameter of the hub cylinder portion 93 of the rear wheel 4 is fixed to the front end surface of the hexagonal shaft portion 37 a of the rear axle 37 by a bolt 134.
　各後車輪４の補強板部９５の左右外側面に、延長車軸１１０がボルト締結されている。延長車軸１１０は、補強板部９５にボルト締結されるフランジ部１１１と、フランジ部１１１の左右外側面の中央部に突設された延長車軸部１１２と、フランジ部１１１の左右外側面及び延長車軸部１１２の基端部に溶接された３つのリブ部１１３を備える。延長車軸部１１２は後車軸３７と同一軸線上に配置される。延長車軸部１１２の先端側（左右外側）は六角軸形状の六角軸部１１２ａになっている。 The extension axle 110 is bolted to the left and right outer surfaces of the reinforcing plate portion 95 of each rear wheel 4. The extension axle 110 includes a flange portion 111 that is bolted to the reinforcing plate portion 95, an extension axle portion 112 that projects from the center of the left and right outer surfaces of the flange portion 111, the left and right outer surfaces of the flange portion 111, and the extension axle. Three rib portions 113 welded to the base end portion of the portion 112 are provided. The extension axle portion 112 is disposed on the same axis as the rear axle 37. The distal end side (left and right outer sides) of the extension axle portion 112 is a hexagonal shaft portion 112a having a hexagonal shaft shape.
　各後車輪４に、延長車軸１１０を介してカゴ車輪１００が着脱自在にそれぞれ取り付けられる。各カゴ車輪１００は、回転中心部に位置するハブ筒部１０１と、環状のリム部１０２と、ハブ筒部１０１から放射状に延びてハブ筒部１０１とリム部１０２とをつなぐ４本のスポーク部１０３と、ハブ筒部１０１及びスポーク部１０３に溶接された４つの補強板部１０４と、リム部１０２の周方向に沿って適宜間隔でリム部１０２に設けられた複数のカゴ車輪ラグ１０５を備える。 The basket wheel 100 is detachably attached to each rear wheel 4 via the extension axle 110. Each cage wheel 100 includes a hub tube portion 101 located at the center of rotation, an annular rim portion 102, and four spoke portions that extend radially from the hub tube portion 101 and connect the hub tube portion 101 and the rim portion 102. 103, four reinforcing plate portions 104 welded to the hub cylinder portion 101 and the spoke portion 103, and a plurality of basket wheel lugs 105 provided on the rim portion 102 at appropriate intervals along the circumferential direction of the rim portion 102. .
　カゴ車輪１００のハブ筒部１０１は、延長車軸１１０の六角軸部１１２ａの先端側の部位に被嵌される。ハブ筒部１０１が六角軸部１１２ａにロックピン軸１３５と止めピン１３６とで抜け不能に固定される。なお、六角軸部１１２ａの先端側部位には、ロックピン軸１３５を挿入可能な孔が軸方向に並んで複数形成されており、ロックピン軸１３５を挿入する孔を適宜選択することで、後車輪４に対するカゴ車輪１００の軸方向での位置を選択可能に構成している。 The hub cylinder portion 101 of the cage wheel 100 is fitted on the tip side portion of the hexagonal shaft portion 112a of the extension axle 110. The hub cylinder portion 101 is fixed to the hexagonal shaft portion 112a by a lock pin shaft 135 and a set pin 136 so as not to be detached. Note that a plurality of holes into which the lock pin shaft 135 can be inserted are formed in the axial direction at the tip side portion of the hexagonal shaft portion 112a. The position in the axial direction of the cage wheel 100 with respect to the wheel 4 is configured to be selectable.
　この実施形態では、カゴ車輪ラグ１０５の数は、後車輪４の推進ラグ９２の数（１１個）と異なっており、カゴ車輪１００のリム部１０２に、１０個の板状のカゴ車輪ラグ１０５が等間隔に設けられている。各カゴ車輪ラグ１０５は、側面視で、外周側端部１０５ａ側が内周側端部１０５ｃ側よりも走行機体２の前進時の回転方向上流側に位置するように傾斜している。言い換えれば、各カゴ車輪ラグ１０５は、側面視で、リム部１０２の回転中心から離れるに従って走行機体２の前進時の回転方向上流側へ変位するように傾斜している。 In this embodiment, the number of the cage wheel lugs 105 is different from the number (11) of the propulsion lugs 92 of the rear wheel 4, and the rim portion 102 of the cage wheel 100 has ten plate-like cage wheel lugs 105. Are provided at equal intervals. Each cage wheel lug 105 is inclined so that the outer peripheral side end 105a side is positioned on the upstream side in the rotational direction when the traveling machine body 2 moves forward relative to the inner peripheral side end 105c side in a side view. In other words, each cage wheel lug 105 is inclined so as to be displaced upstream in the rotational direction when the traveling machine body 2 moves forward as it moves away from the rotation center of the rim portion 102 in a side view.
　図１０に示すように、各カゴ車輪ラグ１０５は側面視で略Ｓ字状の形状を有する。カゴ車輪ラグ１０５の外周側端部１０５ａは、ラグ中央部１０５ｂに対してリム部１０２の回転中心側へ曲がっており、外周側端部１０５ａの傾斜角度θａは、ラグ中央部１０５ｂの傾斜角度θｂよりも大きい。また、カゴ車輪ラグ１０５の内周側端部１０５ｃは、ラグ中央部１０５ｂに対してリム部１０２の回転中心とは反対側へ曲がっており、内周側端部１０５ｃの傾斜角度θｃは、ラグ中央部１０５ｂの傾斜角度θｂよりも大きい。この実施形態では、外周側端部１０５ａと内周側端部１０５ｃは側面視で平行に設けられ、外周側端部１０５ａの傾斜角度θａと内周側端部１０５ｃの傾斜角度θｃは同じである。カゴ車輪ラグ１０５は、外周側端部１０５ａ及び内周側端部１０５ｃが曲がっているので、カゴ車輪ラグ１０５の強度を向上できる。 As shown in FIG. 10, each cage wheel lug 105 has a substantially S-shape when viewed from the side. The outer peripheral side end portion 105a of the cage wheel lug 105 is bent toward the rotation center side of the rim portion 102 with respect to the lug central portion 105b, and the inclination angle θa of the outer peripheral side end portion 105a is the inclination angle θb of the lug central portion 105b. Bigger than. Further, the inner peripheral side end portion 105c of the cage wheel lug 105 is bent to the opposite side to the rotation center of the rim portion 102 with respect to the lug central portion 105b, and the inclination angle θc of the inner peripheral side end portion 105c It is larger than the inclination angle θb of the central portion 105b. In this embodiment, the outer peripheral end 105a and the inner peripheral end 105c are provided in parallel in a side view, and the inclination angle θa of the outer peripheral end 105a and the inclination angle θc of the inner peripheral end 105c are the same. . Since the outer peripheral end 105a and the inner peripheral end 105c of the cage wheel lug 105 are bent, the strength of the cage wheel lug 105 can be improved.
　図７に示すように、カゴ車輪ラグ１０５は、後車輪４とは離間して配置される。これにより、後車輪４とカゴ車輪ラグ１０５（カゴ車輪１００）の間に隙間が設けられている。また、車輪４，１００，１２０の回転軸方向において、カゴ車輪ラグ１０５の幅Ｗ１００は、後車輪の幅Ｗ４及び内側補助車輪１２０の幅Ｗ１２０よりも広くなっている。なお、内側補助車輪１２０の幅Ｗ１２０は、後車輪の幅Ｗ４よりも狭い。 As shown in FIG. 7, the cage wheel lug 105 is disposed away from the rear wheel 4. Thereby, a gap is provided between the rear wheel 4 and the cage wheel lug 105 (the cage wheel 100). Further, the width W 100 of the cage wheel lug 105 is wider than the width W 4 of the rear wheel and the width W 120 of the inner auxiliary wheel 120 in the rotation axis direction of the wheels 4 , 100 , 120 . The width W 120 of the inner auxiliary wheel 120 is narrower than the width W 4 of the rear wheels.
　また、車輪４，１００，１２０の回転軸方向において、カゴ車輪ラグ１０５の幅Ｗ１００は、後車輪４（推進ラグ９２）の幅Ｗ４及び内側補助車輪１２０の幅Ｗ１２０よりも広くなっている。なお、内側補助車輪１２０の幅Ｗ１２０は、後車輪の幅Ｗ４よりも狭い。この実施形態の田植機１では、カゴ車輪ラグ１０５の幅Ｗ１００は、後車輪の幅Ｗ４の２倍以上であり、図１１に示すように、苗の植付幅Ｗｐよりもわずかに広く設定されている。 Further, in the rotation axis direction of the wheel 4,100,120, the width W 100 of the car wheel lug 105 is wider than the width W 120 of the width W 4 and inner auxiliary wheels 120 of the rear wheel 4 (Promotion lugs 92) Yes. The width W 120 of the inner auxiliary wheel 120 is narrower than the width W 4 of the rear wheels. In the rice transplanter 1 of this embodiment, the width W 100 of the cage wheel lug 105 is at least twice the width W 4 of the rear wheel, and is slightly wider than the seedling planting width Wp, as shown in FIG. Is set.
　カゴ車輪１００の外径寸法Ｄ１００（直径と言ってもよい）は、後車輪４の外径寸法Ｄ４よりも小さく設定している。すなわち、カゴ車輪１００は、側面視で後車輪４の内径側に収まる大きさになっている。このため、路上走行時にカゴ車輪１００（特にカゴ車輪ラグ１０５）が走行路面に接触するおそれを抑制でき、カゴ車輪１００を取り付けた状態でも走行機体２でスムーズに路上走行できる。なお、この実施形態では、内側補助車輪１２０の外形寸法Ｄ１２０は、カゴ車輪１００の外径寸法Ｄ１００と同じであり、内側補助車輪１２０を取り付けた状態でも走行機体２でスムーズに路上走行できる。 The outer diameter dimension D 100 (which may be referred to as a diameter) of the cage wheel 100 is set smaller than the outer diameter dimension D 4 of the rear wheel 4. That is, the cage wheel 100 is sized to fit on the inner diameter side of the rear wheel 4 in a side view. For this reason, the possibility that the car wheel 100 (particularly, the car wheel lug 105) may come into contact with the road surface during traveling on the road can be suppressed, and the traveling machine body 2 can smoothly travel on the road even when the car wheel 100 is attached. In this embodiment, outside dimension D 120 of inner auxiliary wheel 120 is identical to the outer diameter D 100 of the car wheel 100 can smoothly road in the traveling machine body 2 in a state of attaching the inner auxiliary wheels 120 .
　図１１に示すように、左右のカゴ車輪１００におけるリム部１０２の位置は、各リム部１０２の移動軌跡が苗植付装置２３の各植付爪３０の箇所と重ならないように設定されている。この実施形態では、左右それぞれのリム部１０２の移動軌跡が平面視で左から１つ目及び８つ目の植付爪３０と重ならないように、カゴ車輪１００におけるリム部１０２の位置が設定される。これにより、各リム部１０２による圃場面の荒れの影響が苗植付装置２３（各植付爪３０）による苗の植付姿勢に及ぶのを抑制できる。なお、リム部９０に適宜間隔で設けられる複数のカゴ車輪ラグ１０５は圃場面をそれほど荒らさないので、カゴ車輪ラグ１０５の移動軌跡が植付爪３０の箇所（苗の植付位置）と重なっていても、整地ロータ８５の整地作用だけで苗を良好な植付姿勢で移植できる。また、左右の後車輪４及び内側補助車輪１２０の移動軌跡も各植付爪３０の箇所と重ならないように設定されており、後車輪４及び内側補助車輪１２０による圃場面の荒れの影響が苗の植付姿勢に及ぶのを抑制している。 As shown in FIG. 11, the positions of the rim portions 102 on the left and right basket wheels 100 are set so that the movement trajectory of each rim portion 102 does not overlap the location of each planting claw 30 of the seedling planting device 23. . In this embodiment, the position of the rim portion 102 in the cage wheel 100 is set so that the movement trajectories of the left and right rim portions 102 do not overlap with the first and eighth planting claws 30 from the left in plan view. The Thereby, it can suppress that the influence of the roughness of the field scene by each rim part 102 reaches the seedling planting attitude | position by the seedling planting apparatus 23 (each planting nail | claw 30). The plurality of basket wheel lugs 105 provided at appropriate intervals on the rim portion 90 do not roughen the farm scene so much that the movement trajectory of the cage wheel lugs 105 overlaps with the place of the planting claws 30 (planting position of the seedling). However, the seedling can be transplanted in a good planting posture only by the leveling action of the leveling rotor 85. In addition, the movement trajectories of the left and right rear wheels 4 and the inner auxiliary wheels 120 are also set so as not to overlap with the locations of the respective planting claws 30. The planting posture is suppressed.
　図１２は、カゴ車輪ラグの移動軌跡を示す模式図である。図１２は、車輪４がスリップせずに走行する場合の、左右のカゴ車輪１００のうち左側のカゴ車輪１００のカゴ車輪ラグ１０５の移動軌跡を示す。カゴ車輪ラグ１０５は、圃場の土１４１の中に入っていくときには略水平姿勢になって土１４１をしっかりと押さえ、大きな浮力を発生させる。また、カゴ車輪ラグ１０５は、上昇時には略垂直姿勢になって、土１４１の中からほぼ真上へ上昇し、土１４１を抱えない。 FIG. 12 is a schematic diagram showing the movement trajectory of the cage wheel lug. FIG. 12 shows a movement locus of the car wheel lug 105 of the left car wheel 100 among the left and right car wheels 100 when the wheel 4 travels without slipping. When the cage wheel lug 105 enters the soil 141 in the field, the cage wheel lug 105 takes a substantially horizontal posture and firmly holds the soil 141 to generate a large buoyancy. Further, the cage wheel lug 105 assumes a substantially vertical posture when ascending, rises almost directly from the soil 141, and does not hold the soil 141.
　この実施形態の田植機１は、走行車輪としての後車輪４に着脱自在に取り付けられるカゴ車輪１００を備え、カゴ車輪１００は、環状のリム部１０２と、リム部１０２の周方向に沿って適宜間隔でリム部１０２に設けられた複数のカゴ車輪ラグ１０５を備え、カゴ車輪ラグ１０５は、外周側端部１０５ａ側が内周側端部１０５ｃ側よりも走行機体２の前進時の回転方向上流側に位置するように傾斜しており、カゴ車輪ラグ１０５の外周側端部１０５ａがリム部１０２の回転中心側へ曲がっている。これにより、カゴ車輪ラグ１０５が圃場の土中に入っていくときに、カゴ車輪ラグ１０５の外周側端部１０５ａと耕盤１４２がなす角度θａ１（図１２参照）がより小さくなる（外周側端部１０５ａが寝た角度になる）ので、カゴ車輪ラグ１０５が圃場の耕盤１４２に突入しにくくなるとともに耕盤１４２を切りにくくなる。また、カゴ車輪ラグ１０５は、外周側端部１０５ａがリム部１０２の回転中心側へ曲がっていることで、カゴ車輪ラグ１０５の上昇時に、走行機体２の前進時の回転方向下流側の面に土を抱えにくくなる。このため、深い圃場や粘土質の圃場で走行機体２が沈没したり旋回時に耕盤１４２を壊して走行機体２が沈没したりするおそれを回避でき、簡単な構成で走行機体２の湿田走破性の大幅な向上を図れる。また、カゴ車輪ラグ１０５は、外周側端部１０５ａが曲がっているので、カゴ車輪ラグ１０５の強度を向上できる。 The rice transplanter 1 of this embodiment includes a cage wheel 100 that is detachably attached to a rear wheel 4 as a traveling wheel, and the cage wheel 100 is appropriately arranged along an annular rim portion 102 and a circumferential direction of the rim portion 102. A plurality of basket wheel lugs 105 provided on the rim portion 102 at intervals are provided, and the cage wheel lugs 105 are upstream in the rotational direction when the traveling machine body 2 is advanced on the outer peripheral side end 105a side than on the inner peripheral side end 105c side. The outer end 105a of the cage wheel lug 105 is bent toward the center of rotation of the rim 102. As a result, when the cage wheel lug 105 enters the soil of the farm field, the angle θa1 (see FIG. 12) formed by the outer periphery side end portion 105a of the cage wheel lug 105 and the cultivator 142 becomes smaller (the outer periphery side end). Therefore, the basket wheel lug 105 is less likely to enter the cultivator 142 in the field and the cultivator 142 is less likely to be cut. Further, the cage wheel lug 105 has an outer peripheral side end portion 105a bent toward the center of rotation of the rim portion 102, so that when the cage wheel lug 105 is raised, the traveling wheel body 2 is placed on the downstream surface in the rotational direction when the traveling machine body 2 moves forward. It becomes difficult to hold the soil. For this reason, it is possible to avoid the risk that the traveling machine body 2 sinks in a deep field or a clay-like field, or that the traveling machine body 2 sinks by turning the tiller 142 when turning, and the traveling machine body 2 is capable of running through the wet field with a simple configuration. Can be greatly improved. Moreover, since the outer peripheral side end part 105a is bent, the strength of the cage wheel lug 105 can be improved.
　ところで、田植機１が圃場を走行すると、後車輪４と、カゴ車輪１００のリム部１０２と、カゴ車輪ラグ１０５とで構成される３辺で、耕盤をすくい取るような動きになる。このとき、カゴ車輪ラグ１０５が後車輪４と連結又は近接していると、耕盤をすくってしまい、カゴ車輪ラグ１０５等に泥が付着する。このような不具合に対して、この実施形態の田植機１では、カゴ車輪ラグ１０５は、後車輪４とは離間して配置され、上記３辺が途中で途切れているので、泥の持ち上げが少なくなるため泥が付着しにくくなり、また、カゴ車輪ラグ１０５に付着した泥が落ちやすくなり、カゴ車輪ラグ１０５に泥が堆積しにくくなるので、泥抜けが良いカゴ車輪１００を実現でき、走行機体２の湿田走破性を向上できる。 By the way, when the rice transplanter 1 travels in the field, it moves like scooping the cultivator on the three sides constituted by the rear wheel 4, the rim portion 102 of the cage wheel 100, and the cage wheel lug 105. At this time, if the cage wheel lug 105 is connected to or close to the rear wheel 4, the tiller is scooped and mud adheres to the cage wheel lug 105 or the like. For such a malfunction, in the rice transplanter 1 of this embodiment, the cage wheel lug 105 is arranged away from the rear wheel 4 and the three sides are interrupted in the middle, so that the lifting of mud is small. Therefore, mud does not adhere easily, and mud adhering to the car wheel lug 105 becomes easy to fall, and mud does not easily accumulate on the car wheel lug 105, so that the car wheel 100 with good mud removal can be realized, and the traveling machine body 2. Improves wetland running ability.
　また、車輪４，１００の回転軸方向において、カゴ車輪ラグ１０５の幅Ｗ１００は、後車輪４の幅Ｗ４よりも広くなっており、例えば後車輪４の幅Ｗ４の２倍以上であり、植付幅Ｗｐ（図１１参照）よりも広いので、カゴ車輪ラグ１０５が発生させる浮力が大幅に増加し、深い圃場や粘土質の圃場で走行機体２の沈没を抑制できる。 Further, in the rotation axis direction of the wheel 4,100, the width W 100 of the car wheel lug 105 is wider than the width W 4 of the rear wheel 4, it is 2 times or more the width W 4 of the rear wheel 4 for example Since it is wider than the planting width Wp (see FIG. 11), the buoyancy generated by the cage wheel lug 105 is greatly increased, and the sinking of the traveling machine body 2 can be suppressed in deep fields or clay fields.
　なお、左右外側の植付爪３０による苗植付位置に対するカゴ車輪１００（カゴ車輪ラグ１０５）の外側突出幅Ｗｏ（図１１参照）は、植付幅Ｗｐよりも狭いことが好ましい。これにより、苗植付け作業中に田植機１が圃場を往復移動する際に、すでに圃場へ植付けられた隣接条の苗をカゴ車輪１００（カゴ車輪ラグ１０５）が踏まないようにできる。例えば、上記実施形態の走行機体２に６条植え用の苗植付装置２３を連結した場合、後車輪４の左右外側に装着されるカゴ車輪１００のカゴ車輪ラグ１０５の外側突出幅Ｗｏは、８条植え用の苗植付装置２３の連結時に比べて、大きくなる。この場合、外側突出幅Ｗｏは、カゴ車輪ラグ１０５が隣接条の苗を踏まない値に設定される。例えば、上記実施形態のカゴ車輪ラグ１０５に比べて幅Ｗ１００が狭いカゴ車輪ラグ１０５を有するカゴ車輪１００が左右の後車輪４に装着される。 In addition, it is preferable that the outside protrusion width Wo (refer FIG. 11) of the cage wheel 100 (cage wheel lug 105) with respect to the seedling planting position by the right and left outside planting claws 30 is narrower than the planting width Wp. Thereby, when the rice transplanter 1 reciprocates the field during the seedling planting operation, the basket wheel 100 (the cage wheel lug 105) can be prevented from stepping on the seedling of the adjacent strip already planted in the field. For example, when the seedling planting device 23 for six-row planting is connected to the traveling machine body 2 of the above embodiment, the outer protrusion width Wo of the cage wheel lug 105 of the cage wheel 100 attached to the left and right outside of the rear wheel 4 is: Compared with the connection of the seedling planting device 23 for eight-row planting, it becomes larger. In this case, the outer protrusion width Wo is set to a value at which the basket wheel lug 105 does not step on the adjacent seedling. For example, the cage wheel 100 having the cage wheel lug 105 having a narrower width W 100 than the cage wheel lug 105 of the above embodiment is attached to the left and right rear wheels 4.
　また、後車輪４は、後車輪４の周方向に沿って適宜間隔で並ぶ複数の推進ラグ９２を備え、カゴ車輪ラグ１０５の数と推進ラグ９２の数が異なっているので、カゴ車輪ラグ１０５の位相と推進ラグ９２の位相をずらすことができ、カゴ車輪ラグ１０５と後車輪４の間に泥が堆積しにくくなり、走行機体２の湿田走破性を向上できる。また、この実施形態では、カゴ車輪ラグ１０５の数は推進ラグ９２の数よりも少ないので、カゴ車輪１００において、リム部１０２の周方向で隣り合うカゴ車輪ラグ１０５同士の間隔を広げることができ、後車輪４よりも泥を抱え込みやすいカゴ車輪１００の泥の抜けを良好にできる。 Further, the rear wheel 4 includes a plurality of propulsion lugs 92 arranged at appropriate intervals along the circumferential direction of the rear wheel 4, and the number of the car wheel lugs 105 and the number of the propulsion lugs 92 are different. And the phase of the propulsion lug 92 can be shifted, so that mud does not easily accumulate between the car wheel lug 105 and the rear wheel 4, and the wetland running ability of the traveling machine body 2 can be improved. Moreover, in this embodiment, since the number of the cage wheel lugs 105 is smaller than the number of the propulsion lugs 92, in the cage wheel 100, the interval between the cage wheel lugs 105 adjacent in the circumferential direction of the rim portion 102 can be increased. Further, it is possible to improve the sludge removal of the cage wheel 100 which is easier to hold mud than the rear wheel 4.
　また、カゴ車輪１００は、後車輪４に延長車軸１１０を介して取り付けられるので、カゴ車輪１００を後車輪４に強固に取り付けることができる。また、カゴ車輪１００は、走行機体２の湿田走破性の大幅な向上を図れるものでありながら、容易に取り外せるので、例えばトラック等の荷台に田植機１を搭載して運搬する際に、左右のあおり板やあゆみ板に干渉せずに田植機１をスムーズに搭載できる。また、内側補助車輪１２０を装着せずに、後車輪４の左右外側にカゴ車輪１００だけを取り付けるようにしてもよい。また、例えば後車輪４を除いて、カゴ車輪１００と内側補助車輪１２０だけで、走行機体２の後部を支持する構成にすることも可能である。 Moreover, since the cage wheel 100 is attached to the rear wheel 4 via the extension axle 110, the cage wheel 100 can be firmly attached to the rear wheel 4. In addition, the cage wheel 100 can be easily removed while being able to greatly improve the wettability of the traveling machine body 2. For example, when the rice transplanter 1 is mounted on a loading platform such as a truck, The rice transplanter 1 can be smoothly mounted without interfering with the tilt board or the ayumi board. Further, only the cage wheel 100 may be attached to the left and right outer sides of the rear wheel 4 without mounting the inner auxiliary wheel 120. For example, except for the rear wheel 4, the rear portion of the traveling machine body 2 can be supported only by the cage wheel 100 and the inner auxiliary wheel 120.
　また、この実施形態では、図１０に示すように、カゴ車輪ラグ１０５の外周側端部１０５ａの傾斜角度θｂ及び内周側端部１０５ｃの傾斜角度θｃは同じであるが、外周側端部１０５ａの傾斜角度θｂと内周側端部１０５ｃの傾斜角度θｃは互いに異なっていてもよい。また、内周側端部１０５ｃは、ラグ中央部１０５ｂに対して、曲がっていなくてもよいし、リム部１０２の回転中心側へ曲がっていてもよい。 In this embodiment, as shown in FIG. 10, the inclination angle θb of the outer peripheral side end 105a of the cage wheel lug 105 and the inclination angle θc of the inner peripheral end 105c are the same, but the outer peripheral end 105a. The inclination angle θb of the inner peripheral side end portion 105c may be different from each other. Further, the inner peripheral side end portion 105 c may not be bent with respect to the lug center portion 105 b, or may be bent toward the rotation center side of the rim portion 102.
　また、この実施形態では、カゴ車輪ラグ１０５の外周側端部１０５ａの傾斜角度θａ及び内周側端部１０５ｃの傾斜角度θｃは、後車輪４の推進ラグ９２の傾斜角度θｄ（図１０参照）よりも大きいが、傾斜角度θｄ以下であってもよい。また、この実施形態では、ラグ中央部１０５ｂの傾斜角度θｂは、推進ラグ９２の傾斜角度θｄよりも小さいが、傾斜角度θｄ以上であってもよい。 In this embodiment, the inclination angle θa of the outer peripheral side end portion 105a and the inclination angle θc of the inner peripheral side end portion 105c of the cage wheel lug 105 are equal to the inclination angle θd of the propulsion lug 92 of the rear wheel 4 (see FIG. 10). It may be larger than the tilt angle θd or less. In this embodiment, the inclination angle θb of the lug center portion 105b is smaller than the inclination angle θd of the propulsion lug 92, but may be equal to or more than the inclination angle θd.
　また、この実施形態では、深い圃場や粘土質の圃場で走行機体２の浮力及び推進力を得るために、左右の内側補助車輪１２０が設けられている。内側補助車輪１２０の外周ラグ１２５は、後車輪４の推進ラグ９２や、カゴ車輪１００のカゴ車輪ラグ１０５に比べて小さいので、泥が蓄積しやすい後車輪４の内側における泥はけ性を確保している。なお、内側補助車輪１２０を取り外して、後車輪４の外側にカゴ車輪１００を配置する構成であってもよい。 Further, in this embodiment, the left and right inner auxiliary wheels 120 are provided in order to obtain the buoyancy and propulsive force of the traveling machine body 2 in a deep field or a clay field. Since the outer peripheral lug 125 of the inner auxiliary wheel 120 is smaller than the propulsion lug 92 of the rear wheel 4 and the cage wheel lug 105 of the cage wheel 100, the mud repellency inside the rear wheel 4 where mud tends to accumulate is ensured. is doing. In addition, the structure which removes the inner side auxiliary wheel 120 and arrange | positions the cage wheel 100 on the outer side of the rear wheel 4 may be sufficient.
　本発明は、前述の実施形態に限らず、様々な態様に具体化でき、各部の構成は図示の実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々変更が可能である。例えば本発明は乗用型田植機に適用するに限らず、主に水田で作業する各種苗移植機等の作業車両にも適用可能である。また、田植機１の前車輪３のバリエーションも種々選択できる。例えば幅広車輪にしてもよいし、通常の前車輪３を左右に二つずつ並べて設けてもよい。また、走行車輪としての前車輪３の左右外側に専用のカゴ車輪、例えばカゴ車輪１００と同様の構成のカゴ車輪を取り付けてもよい。いずれも、前車輪３としての圃場との設置幅を拡大でき、湿田走破性向上に貢献する。 The present invention is not limited to the above-described embodiment, and can be embodied in various forms. The configuration of each unit is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention. is there. For example, the present invention can be applied not only to a riding type rice transplanter but also to work vehicles such as various seedling transplanters that mainly work in paddy fields. Moreover, the variation of the front wheel 3 of the rice transplanter 1 can also be selected variously. For example, wide wheels may be used, or two normal front wheels 3 may be provided side by side on the left and right. Further, a dedicated cage wheel, for example, a cage wheel having the same configuration as the cage wheel 100 may be attached to the left and right outer sides of the front wheel 3 as the traveling wheel. In any case, the installation width with the field as the front wheel 3 can be expanded, which contributes to the improvement of wetland running ability.
１　乗用型田植機（作業車両）
２　走行機体
４　後車輪（走行車輪）
６　ミッションケース
３７　後車軸
３７ａ　六角軸部
９２　推進ラグ
１００　カゴ車輪
１０２　リム部
１０５　カゴ車輪ラグ
１０５ａ　カゴ車輪ラグの外周側端部 1 Passenger rice transplanter (work vehicle)
2 traveling body 4 rear wheel (traveling wheel)
6 Mission case 37 Rear axle 37a Hexagonal shaft portion 92 Propulsion lug 100 Basket wheel 102 Rim portion 105 Basket wheel lug 105a Outer peripheral end of cage wheel lug

Claims (3)

  1. 　走行機体を支持する走行車輪を備える作業車両において、
    　前記走行車輪に着脱自在に取り付けられるカゴ車輪を備え、
    　前記カゴ車輪は、環状のリム部と、前記リム部の周方向に沿って適宜間隔で前記リム部に設けられた複数のカゴ車輪ラグを備え、
    　前記カゴ車輪ラグは、側面視で、外周側端部側が内周側端部側よりも前記走行機体の前進時の回転方向上流側に位置するように傾斜しており、
    　前記カゴ車輪ラグの外周側端部が前記リム部の回転中心側へ曲がっている、
    作業車両。     In a work vehicle including a traveling wheel that supports a traveling machine body,
    A basket wheel detachably attached to the traveling wheel;
    The cage wheel includes an annular rim portion and a plurality of cage wheel lugs provided on the rim portion at appropriate intervals along the circumferential direction of the rim portion,
    The basket wheel lug is inclined so that the outer peripheral side end side is located on the upstream side in the rotational direction when the traveling machine body is moving forward than the inner peripheral side end side in the side view,
    The outer peripheral side end portion of the basket wheel lug is bent toward the rotation center side of the rim portion,
    Work vehicle.
  2. 　前記カゴ車輪ラグは、前記走行車輪とは離間して配置される、
    請求項１に記載の作業車両。     The basket wheel lug is disposed apart from the traveling wheel,
    The work vehicle according to claim 1.
  3. 　前記走行車輪の回転軸方向において、前記カゴ車輪ラグの幅が前記走行車輪の幅よりも広くなっている、
    請求項１に記載の作業車両。     In the direction of the rotation axis of the traveling wheel, the width of the car wheel lug is wider than the width of the traveling wheel.
    The work vehicle according to claim 1.
PCT/JP2017/036328 2016-12-15 2017-10-05 Working vehicle WO2018110048A1 (en)

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JP7085979B2 (en) 2018-12-27 2022-06-17 株式会社クボタ Paddy field work machine
CN111656925A (en) * 2020-06-16 2020-09-15 佳木斯大学 Foldable anti-sinking wheel of transplanter
CN112046191A (en) * 2020-09-23 2020-12-08 于洪军 Anti-sinking structure for agricultural machinery
RU207864U1 (en) * 2021-05-20 2021-11-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Light ATV drive wheel
CN116922992A (en) * 2021-08-30 2023-10-24 湖北工业大学 Bionic connecting rod

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TW201824988A (en) 2018-07-16
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JP6726089B2 (en) 2020-07-22
CN110062576B (en) 2022-08-02
JP2018093821A (en) 2018-06-21

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