JP4870440B2 - Rice transplanter - Google Patents

Description

  The present invention relates to a rice transplanter including a leveling device.

  Conventionally, as one form of rice transplanter, there is one in which a planting part is connected to a rear part of a traveling part so as to be movable up and down, and a leveling device is attached to the planting part (see, for example, Patent Document 1).

  The leveling device is interlocked and connected to a prime mover portion provided in the traveling portion via a transmission mechanism portion, and the transmission mechanism portion transmits a power from the prime mover portion to a rear axle case provided in the traveling portion. In addition, the output shaft is interlocked and connected to the leveling device via a reduction gear.

In addition, a clutch mechanism is provided on the output shaft so that the leveling device can be driven and stopped by linking the operation of the operating means for turning on and off the clutch mechanism and the lifting operation of the planting part. Yes.
JP-A-8-191614

  However, in the above-mentioned rice transplanter, since the leveling device is automatically driven when the planting part is lowered, for example, it is not possible to perform only the planting work with the leveling device stopped. There is.

Therefore, in the present invention, in the rice transplanter in which the planting part is connected to the rear of the traveling part so as to be movable up and down, and the leveling device is attached to the planting part, the motor unit provided in the traveling part via the transmission mechanism part In addition to interlocking the leveling device, a clutch mechanism is provided in the transmission mechanism, and the clutch mechanism is linked to the ascending operation of the planting unit, while the clutch mechanism entering operation is linked to the descending operation of the planting unit. The interlock mechanism is configured to connect the base end to a wire connecting piece provided at the front end of the lower surface of the lower link of the elevating mechanism that raises and lowers the planting portion, and to move the operating arm provided to the clutch mechanism The connecting wire is connected to the connecting pin, and a connecting piece having a long hole extending in the front-rear direction is connected to the tip of the connecting wire, and the connecting piece is detachably connected to the connecting pin of the operating arm. and, connecting pieces When connected to the connecting pin of the actuating arm, by linking the switching on and off operation of the clutch mechanism to the lifting operation of the planting unit, the coupling piece when not connected to the connecting pin of the actuating arm, the lifting operation of the planting unit a structure in which in a state of increasing the planting unit without interlocking the switching on and off operation of the clutch mechanism Ru actuates the leveling device, wherein the transmission mechanism includes an input shaft for inputting power from the prime mover unit, the input An output shaft that outputs power from the shaft to the leveling device, an intermediate shaft interposed between the output shaft and the input shaft, and a clutch mechanism provided on the intermediate shaft, The transmission shaft and the rear input shaft are coaxially linked and connected between the front and rear walls of the transmission mechanism, and an output gear is attached to the outer peripheral surface of the input shaft. The output shaft is connected to the front of the transmission mechanism.・ Attach the input gear across the rear wall, the intermediate shaft An intermediate shaft that runs horizontally between the front wall of the clutch case forming body that is connected to the front wall of the transmission mechanism section and the rear wall of the transmission mechanism section and that has a relatively small torque acting on the output shaft. The clutch mechanism and the intermediate output gear are attached, and the output gear attached to the input shaft is engaged with the intermediate input gear attached to the clutch mechanism, while the input gear attached to the output shaft is engaged with the intermediate output gear. A rice transplanter characterized by

  The present invention is also characterized by the following configuration.

The transmission mechanism section includes an input shaft for inputting power from the prime mover section, an output shaft for outputting power from the input shaft to the leveling device, and an intermediate between the output shaft and the input shaft. A shaft mechanism and a clutch mechanism provided on the intermediate shaft, and the input shaft is formed in a cylindrical shape with an axial line directed in the front-rear direction, and in front of the transmission mechanism portion formed in a flat box shape in the front-rear direction. -It penetrates between the rear walls and is horizontally mounted so as to be rotatable around its axis. The rear end of the transmission shaft is fitted from the front to the input shaft, and the front end of the rear input shaft is fitted from the rear. Then, the transmission shaft and the rear input shaft are coaxially interlocked and connected via the input shaft, an output gear is attached to the outer peripheral surface of the input shaft, and the output shaft is formed with the axis line directed in the front-rear direction. , Between the front and rear walls of the transmission mechanism, lay horizontally around its axis, A force gear is attached, and the intermediate shaft is formed with the axis line in the front-rear direction, and is bulged forward on the front wall of the transmission mechanism portion and connected to the front wall of the clutch case forming body and the rear of the transmission mechanism portion. A clutch mechanism and an intermediate output gear are attached to the intermediate shaft, which is mounted on the intermediate shaft, which is pivotably mounted around the axis and is relatively smaller in torque than the output shaft. The intermediate input gear meshes with the output gear attached to the input shaft, while the intermediate output gear meshes with the input gear attached to the output shaft .

According to the present invention, the on / off operation of the clutch mechanism can be automatically performed in conjunction with the lifting / lowering operation of the planting portion, and the distal end side connecting piece provided on the distal end side of the interlocking wire can be connected to the connecting pin of the operating arm. The desired action can be taken by simply manually operating the on / off operation of the clutch mechanism via the operating arm. In other words, if you want to operate the leveling device with the planting part raised, such as during car washing, inspection, or exhibition demonstration, manually operate the operating arm to enter and operate the clutch mechanism. It can respond by. In addition, when only planting work is performed without performing leveling work by the leveling device, the leveling device can be stopped by manually operating the operating arm and turning off the clutch mechanism, A planting part can also respond | correspond by operating planting in a descent state.
In addition, since the clutch mechanism is provided on the intermediate shaft on which a relatively smaller torque is acting than the output shaft, the on / off operation of the clutch mechanism can be performed with a small operating force. Accordingly, the on / off operation of the clutch mechanism can be easily performed, and the clutch operability can be improved.

  A shown in FIG. 1 is a rice transplanter according to the present invention. The rice transplanter A connects the planting part 2 to the rear of the traveling unit 1 via the lifting mechanism 3 so as to be movable up and down. The leveling device 4 is attached to

  As shown in FIG. 1, the traveling unit 1 includes a motor unit 11 disposed at the front of the machine frame 10, a driving unit 12 disposed at the rear of the motor frame 11, and a lower front portion of the machine frame 10. A pair of left and right front wheels 13 and 13 are attached to the vehicle body 10 via a front axle case (not shown), while a pair of left and right rear wheels 15 and 15 are attached to the rear part of the body frame 10 via a rear axle case 14. Reference numeral 16 denotes a handle provided in the driving unit 12, and reference numeral 17 denotes a driver's seat provided in the driving unit 12.

  The aircraft frame 10 is provided with a transmission unit 20 positioned below the prime mover unit 11 and above the front axle case. The transmission unit 20 is connected to the prime mover unit 11 by a transmission belt (not shown). And the rear axle case 14 are linked to the transmission unit 20 via a transmission shaft 21.

  In this way, power is transmitted from the motor unit 11 to the transmission belt → the transmission unit 20 → the front axle case and the transmission unit 20 → the transmission shaft 21 → the rear axle case 14, and the front and rear wheels 13, 13, 15, 15 are transmitted. Four-wheel drive is possible.

  As shown in FIGS. 1 and 2, the planting unit 2 erected a planting frame 26 above the front part of the planting mission case 25, and planted a seedling stand 27 on the planting frame 26. Attached to the upper side of the mission case 25 so as to be able to reciprocate left and right, and planting the seedlings from the seedling mat placed on the seedling stand 27 by the planting claws 28 provided at the rear of the planting mission case 25 and planting them in the field I am doing so. 29 is a float.

  As shown in FIGS. 1, 2, and 4, the elevating mechanism 3 is provided between a rising frame forming body 30 provided at the rear part of the body frame 10 of the traveling unit 1 and a planting frame 26 of the planting unit 2. It is provided with a top link 31, a lower link 32, and an elevating cylinder 33 that raises and lowers the lower link 32. 31a is a front end support shaft of the top link, 32a is a front end support shaft of the lower link, and 33a and 33b are cylinder connecting pins.

  In this way, the planting part 2 can be moved up and down through the lower link 32 and the top link 31 by the lifting cylinder.

  As shown in FIGS. 1 to 3, the leveling device 4 includes a leveling body 35 disposed immediately before the planting unit 2, a transmission mechanism unit 36 attached to the front wall of the rear axle case 14 of the traveling unit 1, A ground leveling transmission shaft 37 interposed between the transmission mechanism 36 and the leveling body 35 is provided.

  Below, the structure of the transmission mechanism part 36 which concerns on the principal part of this invention is demonstrated first, and each structure of the leveling main body 35 and the leveling transmission shaft 37 is demonstrated after that.

[Description of transmission mechanism 36]
As shown in FIGS. 4 to 8, the transmission mechanism portion 36 is attached to the right side portion of the front wall of the rear axle case 14 via an attachment body 98, and power from the prime mover portion 11 is input into the case body 99. Input shaft 102, an output shaft 103 that outputs power from the input shaft 102 to the leveling device 4, an intermediate shaft 104 interposed between the output shaft 103 and the input shaft 102, and the intermediate shaft 104 And a clutch mechanism 105 provided in the vehicle.

  As shown in FIGS. 7 and 8, the case body 99 is formed in a box shape that is flat in the front-rear direction, and a clutch case forming body 106 that bulges forward is provided in the center on the right side of the front wall 100. ing.

  As shown in FIGS. 7 and 8, the input shaft 102 is formed in a cylindrical shape with the axial line directed in the front-rear direction and penetrates between the upper portions of the front and rear walls 100, 101 of the case body 99. The shaft is supported so as to be rotatable about its axis via shaft support pieces 107 and 107. Reference numeral 108 denotes a sealing material.

  Then, the rear end 21a of the transmission shaft 21 is fitted into the input shaft 102 from the front, and the front end 111 of the rear input shaft 110 is fitted from the rear to input the transmission shaft 21 and the rear input shaft 110. The shafts 102 are linked and connected coaxially.

  An output gear 112 is attached to the center of the outer peripheral surface of the input shaft 102.

  As shown in FIGS. 7 and 8, the output shaft 103 is formed with its axial line directed in the front-rear direction, and between the lower portions of the front and rear walls 100, 101 of the case main body 99 via a pair of front and rear bearings 113, 114. The portion 115 is horizontally mounted so as to be rotatable about its axis, and the rear half portion 116 is protruded rearward. 117 is a sealing material.

  An input gear 118 is attached to the front half portion 115 of the output shaft 103.

  As shown in FIGS. 7 and 8, the intermediate shaft 104 is formed with its axis lined in the front-rear direction, and the right central portion of the front wall 109 of the clutch case forming body 106 and the rear wall 101 of the case main body 99. In between, a pair of front and rear bearings 120 and 121 are mounted so as to be rotatable about the axis thereof.

  A clutch mechanism 105, which will be described later, is provided in the middle portion of the intermediate shaft 104, and an intermediate output gear 122 is attached to the rear portion of the intermediate shaft 104 so that the input gear 118 is engaged with the intermediate output gear 122.

  Here, the clutch mechanism 105 operates the meshed body 123, the meshed body 124 that meshes with and releases the meshed body 123, the cam shaft 125 that meshes and releases the meshed body 124, and the camshaft 125. An actuating arm 126 to be engaged, and a pressing spring 127 that elastically biases the meshing body 124 in the meshing direction.

  The to-be-engaged body 123 is configured such that a cylindrical fitting piece 130 is fitted to a middle part of the intermediate shaft 104 so as to be rotatable about its axis, and is not slidable in the axial direction of the intermediate shaft 104. A hook-shaped engagement piece 131 is formed at the front end edge of the engagement piece 130.

  An intermediate input gear 129 is attached to the outer peripheral surface of the fitting piece 130, and the output gear 112 is engaged with the intermediate input gear 129.

  The meshing body 124 is configured so that a cylindrical fitting piece 132 is slidably fitted in the axial direction in the middle of the intermediate shaft 104 and can be rotated integrally with the intermediate shaft 104. A hook-shaped engagement piece 133 is formed at the rear end edge of the piece 130, while a hook-shaped cam engagement piece 134 is formed at the front end edge of the fitting piece 130.

  The meshing piece 133 slides in the direction of the meshed piece 131 to engage (clutch state), and slides in a direction away from the meshed piece 131 to release the meshing (clutch disengaged state). I am doing so.

  As shown in FIG. 8, the cam shaft 125 includes a shaft piece 135 formed with its axis line directed in the left-right direction, and a cam piece 136 formed on the right end portion of the coaxial book piece 135. The shaft piece 135 is inserted into a boss portion 139 that is continuously connected with the axis line outwardly from the left side of the peripheral surface of the formed body 106 so as to be rotatable about the axis, and the cam piece 136 is The engagement piece 130 is engaged with the cam engagement piece 134.

  Then, by rotating the cam shaft 125 about its axis, the cam piece 136 causes the meshing body 124 to slide forward against the elastic biasing force of a press spring 127 described later via the cam engagement piece 134. While the engagement state can be released, the camshaft 125 is rotated and restored in the opposite direction, so that the engagement body 124 is slid rearward by an elastic biasing force of a later-described pressing spring 127, so that The meshed body 123 can be meshed with the meshing body 123.

  As shown in FIGS. 5 and 6, the operating arm 126 has a base end portion (lower end portion) linked to the left end portion (outer end portion) of the cam shaft 125 and a tip end portion (upper end portion). A connecting pin 137 is provided so as to extend upward and to the right from the tip.

  The pressing spring 127 is wound around the front outer peripheral surface of the intermediate shaft 104 and is interposed between the rear end surface of the front bearing 120 and the front end surface of the cam engagement piece 134.

  In this way, due to the elastic biasing force of the pressing spring 127, the meshing body 124 is resiliently biased in the direction of meshing with the body 123 to be meshed.

  Here, as shown in FIG. 6, the transmission mechanism unit 36 is disposed at a position above the lower surface 14 a of the rear axle case 14 provided in the traveling unit 1 and operates the clutch mechanism 105 of the transmission mechanism unit 36 on and off. The operating arm 126 is disposed above the lowermost end 138 of the transmission mechanism 36.

  In this way, since the clutch mechanism 105 is provided on the intermediate shaft 104 on which a relatively smaller torque is acting than the output shaft 103, the on / off operation of the clutch mechanism 105 can be performed with a small operating force.

  Therefore, the on / off operation of the clutch mechanism 105 can be easily performed, and the clutch operability can be improved.

  Although the traveling unit 1 may sink deep depending on the soil quality of the field, at least the operating arm 126 of the clutch mechanism 105 is at the lowest end of the transmission mechanism unit 36 disposed above the lower surface 14a of the rear axle case 14. Since the operating arm 126 is disposed at a position higher than the portion 138, the operating arm 126 can be prevented from being buried in the field, and the clutch operating performance of the clutch mechanism 105 by the operating arm 126 can be ensured satisfactorily. Can do.

  Further, since the operating arm 126 is disposed at a relatively high position, it is possible to prevent scattered mud or the like from adhering to the operating arm 126. From this point also, the clutch of the clutch mechanism 105 by the operating arm 126 can be prevented. Good operating performance can be ensured.

  As shown in FIGS. 4 and 5, the operation of the operation arm 126 as an operation means for operating the clutch mechanism 105 provided in the transmission mechanism portion 36 in conjunction with the raising / lowering operation of the planting portion 1, A clutch operating lever 140 as clutch operating means is linked to the operating arm 126.

  That is, a wire connecting piece 141 is provided at the front end of the lower surface of the lower link 32 of the lifting mechanism 3 that moves the planting unit 2 up and down, and the wire connecting piece 141 extends downward from the lower surface of the lower link 32 and has a distal end portion. 142 is bent outwardly on the left side to form a bowl shape.

  An interlocking wire 143 is interposed between the distal end portion 142 of the wire connecting piece 141 and the connecting pin 137 of the operating arm 126. As the interlocking wire 143, the outer periphery of the inner wire 144 is provided. A sliding wire covered with an outer wire 145 is used.

  The inner wire 144 is connected to a base end side connecting piece 146 extending in the front-rear direction at the base end, and a base end side long hole 147 extending in the front-rear direction is formed in the base end side connecting piece 146 to form a wire connecting piece. A base end side connecting piece 146 is detachably connected to a front end portion 142 of 141 through a base end side long hole 147.

  Further, the inner wire 144 connects the distal end side connecting piece 148 extending in the front-rear direction to the distal end, and forms a front end side long hole 149 extending in the front-rear direction in the distal end side connecting piece 148 to connect the operating arm 126. A front end side connecting piece 148 is detachably connected to the pin 137 via a front end side long hole 149.

  The outer wire 145 can be attached to the base end side outer receiving piece 150 provided on the upper portion of the rear axle case 14 and the base end portion 151 can be adjusted in the wire extending direction (front and rear direction in the present embodiment) via nuts 152 and 153. On the other hand, the front end portion is attached to the front end side outer receiving piece 154 provided at the rear portion of the machine body frame 10 via a nut so that the attachment position can be adjusted in the wire extending direction (the front-rear direction in the present embodiment). The attachment portion of the distal end portion of the outer wire 145 to the distal end side outer receiving piece 154 has the same structure as the attachment portion of the outer wire 164 to the distal end side outer receiving piece 154, which will be described later. Omitted.

  In this way, the relative positional relationship between the end fixing position of the outer wire 145 and the inner wire 144 can be adjusted, and the height setting from the field scene G of the planting portion 2 that reveals the clutch disengaged state is set. Can be performed arbitrarily.

  Then, the cutting operation of the clutch mechanism 105 is interlocked with the ascending operation of the planting part 2 near the highest ascent position, while the entering operation of the clutch mechanism 105 is interlocked with the descending operation of the planting part 2 near the highest ascending position. I am doing so.

  The operation unit 12 is provided with a lever support 160, and the base end of the clutch operation lever 140 is pivotally supported on the lever support 160 via a lever support shaft 161 whose axis is directed in the left-right direction. The 140 can be turned up and down.

  An operation wire 162 is interposed between the base of the clutch operation lever 140 and the connecting pin 137 of the operating arm 126. As the operation wire 162, the outer periphery of the inner wire 163 is connected to the outer wire 164. A sliding wire coated with is used.

  The inner wire 163 connects the base end portion to the base portion of the clutch operating lever 140 via the connecting pin 165, and connects the front end side connecting piece 166 extending in the front-rear direction to the front end, and the front end side connecting piece 166 is connected to the front and rear sides. A distal end long hole 167 extending in the direction is formed, and the distal end side connecting piece 166 is detachably connected to the connecting pin 137 of the operating arm 126 via the distal end side long hole 167.

  The outer wire 164 is attached to the base end side outer receiving piece 168 provided on the lever support 160 through the nuts 170 and 171 on the base end side outer receiving piece 168, while the front end side outer receiving piece 154 provided on the rear part of the body frame 10. Further, the tip 172 is attached via nuts 173 and 174 so that the attachment position can be adjusted in the wire extending direction (in the front-rear direction in the present embodiment).

  Here, the distal end side coupling piece 148 of the interlocking wire 143 and the distal end side coupling piece 166 of the operation wire 162 that are detachably coupled to the coupling pin 137 of the operating arm 126 are coupled in parallel in the left and right directions. The distal end side connecting piece 148 of the interlocking wire 143 is arranged closer to the distal end side (free end side) of the connecting pin 137 than the distal end side connecting piece 166 of the operation wire 162.

  In this way, the on / off operation of the clutch mechanism 105 can be automatically performed in conjunction with the raising / lowering operation of the planting unit 2 or manually by the clutch operation lever 140. In the case where only the planting work is performed without performing the leveling work by the device 4, the operating arm 126 of the clutch mechanism 105 is manually operated by the clutch operating lever 140 and the clutch mechanism 105 is turned off to operate the leveling. The operation of the device 4 can be stopped, and the planting unit 2 can cope with the planting operation in the lowered state.

  Moreover, since the distal end side connecting piece 148 of the interlocking wire 143 is disposed closer to the distal end side (free end side) of the connecting pin 137 than the distal end side connecting piece 166 of the operation wire 162, the distal end side of the interlocking wire 143 The operation of attaching / detaching only the connecting piece 148 can be easily performed.

  Therefore, when it is desired to operate the leveling device 4 with the planting part 2 raised, for example, it is possible to respond promptly at the time of car washing, inspection, exhibition demonstration, and the like.

  Furthermore, since the clutch mechanism 105 can be brought into a clutch disengaged state when the planting part 2 is raised to a predetermined height according to the preference of the operator, the operability can be improved.

  In addition, since the cutting operation of the clutch mechanism 105 is linked to the ascending operation of the planting part 2 near the highest ascending position, in a field where the front and rear wheels 13, 13, 15, and 15 are deeply inserted Even when leveling work and planting work are performed with the planting part 2 raised, the clutch mechanism 105 is not automatically disengaged in the field, ensuring good workability. Can do.

  Moreover, since the on / off operation of the clutch mechanism 105 is linked to the lowering operation of the planting part 2 from the vicinity of the highest position, the operating stroke of the operating arm 126 for turning on / off the clutch mechanism 105 can be reduced, The operating arm 126 can be reliably operated, and good clutch performance can be ensured.

[Description of leveling body 35]
The leveling body 35 includes an elevating support machine frame 38 attached to the planting frame 26 of the planting part 2, and left and right rotor rotating shafts 39, 39 horizontally mounted between the lower ends of the elevating support machine frame 38, Each of the rotor rotations between a plurality of rotors 40 (five in this embodiment) coaxially attached to the outer periphery of each rotor rotation shaft 39, 39 and between the rotors 40, 40 adjacent to the left and right in the substantially central portion. A transmission case 41 is connected to the driving shafts 39 and 39 to transmit power from the prime mover unit 11 provided in the traveling unit 1 to the rotor rotation shafts 39 and 39.

  Here, the lifting support machine frame 38 is pivotally mounted on the planting frame 26 via a pair of left and right pivot brackets 42, 42 so that the pivot shaft 43 extending in the left-right direction can be pivoted. A pair of left and right lifting arms 44, 44 project forward from the left and right sides of the shaft 43, and extend vertically via links 45, 45 extending vertically to the tip of each lifting arm 44, 44. The upper ends of the pair of left and right sliding rods 46, 46 are connected.

  The pair of left and right sliding rods 46, 46 guide the middle part of the pair of left and right guide bodies 47, 47 attached to the planting frame 26 so that they can slide up and down, and the left and right rotors at the lower end. Each middle part of the rotating shafts 39 and 39 is pivotally supported.

  In addition, a base end portion of an elevating operation lever 48 extending in the front-rear direction is attached to the central portion of the rotation support shaft 43.

  In this way, by turning the elevating operation lever 48 in the vertical direction, the pair of left and right sliding rods 46, 46 are slid in the vertical direction and attached to the left and right rotor rotating shafts 39, 39. The rotor 40 can be moved up and down between a use position grounded to the farm scene G (see FIG. 1) and a non-use position separated from the farm scene G.

  As shown in FIGS. 9 and 10, the left and right rotor rotation shafts 39, 39 are fixed-side rotation shafts 50, 50 supported by the planting part 2 via the lifting support frame 38, Removable-side rotating shafts 51, 51 that are detachably connected to the outer ends of the fixed-side rotating shafts 50, 50, and at least one rotor 40, 40 is attached to each of the removable-side rotating shafts 51, 51. As a result, the rotors 40 and 40 are detachable via the detachable side rotation shafts 51 and 51.

  The fixed rotation shaft 50 and the detachable rotation shaft 51 forming each rotor rotation shaft 39 are respectively cylindrical hollow shafts 50a and 51a extending in the left-right direction, and the hollow shafts 50a and 51a. It is formed from solid shafts 50b and 51b fitted in the central portion.

  Further, as shown in FIG. 10, the fixed-side rotating shaft 50 has an outer end portion on a fixed-side outer end receiving member 52 provided at the lower end portion of the sliding rod 46 that forms a part of the lifting support machine frame 38. The fixed-side outer end receiving member 52 is formed by attaching a fixed-side bearing piece 53 to the lower end of the sliding rod 46.

  On the other hand, as shown in FIG. 10, the attaching / detaching side rotation shaft 51 pivots the inner end portion on the attaching / detaching side inner end receiving member 54 detachably attached to the fixed side outer end receiving member 52. The detachable side inner end receiving body 54 is formed of a detachable side connecting piece 55 and a detachable side bearing piece 56 attached to the detachable side connecting piece 55 with its axis line directed in the left-right direction.

  The fixed-side rotation shaft 50 and the detachable-side rotation shaft 51 of the present embodiment are formed from hollow shafts 50a and 51a and solid shafts 50b and 51b, respectively. It is not restricted to a thing, All may be a hollow shaft body and a solid shaft body may be sufficient.

  The fixed-side outer end receiving member 52 and the detachable-side inner end receiving member 54 are formed with an abutting surface that abuts each other in the axial direction, and one abutting surface (in this embodiment, the sliding rod 46 of the sliding rod 46). 46a is formed with a fitting recess 53a, while the other butting surface (formed on the detachable side inner end receiver 54 in this embodiment) is formed with a fitting projection 56a. The fitting convex portion 56a and the fitting concave portion 53a are fitted to face each other. 57 is a connecting bolt.

  Also, a detachable side outer end receiver 58 that receives the outer end of the detachable side rotating shaft 51 and a detachable side inner end receiver 54 that receives the inner end of the detachable side rotating shaft 51 are connected to a connecting body 59. Are connected through.

  Here, the fixed-side bearing piece 53 supports the outer portion of the hollow inner shaft 61 extending in the left-right direction via the bearing 60, and the inner portion of the hollow inner shaft 61 is connected to the fixed-side rotating shaft 50. The hollow shaft 50a is fitted and interlocked.

  The detachable side bearing piece 56 supports the middle portion of the solid inner shaft 63 extending in the left-right direction via the bearing 62, and the inner portion of the solid inner shaft 63 is connected to the inside of the hollow shaft 50a. While being detachably inserted into the part and interlockingly connected, it is interlocked and interlocked by being inserted into the inner part of the hollow shaft 51a of the detachable rotation shaft 51.

  Further, the outer side receiving end 58 of the detachable side supports the outer part of the hollow inner shaft 65 extending in the left-right direction via the bearing 64, and the outer part of the hollow inner shaft 65 is attached to the detachable side rotation shaft. The hollow shaft 51a of 51 is fitted and interlocked.

  The hollow inner shaft 61 is not limited to a shaft body including a hollow portion as long as it is a shaft body that can be interlocked and connected to a shaft such as the fixed-side rotation shaft 50, and may be a solid shaft body. The solid inner shaft 63 is not limited to a solid shaft body as long as the shaft body can be interlocked and connected to the fixed rotation shaft 50, the detachable rotation shaft 51, and the like. Good. Furthermore, the hollow inner shaft 65 is not limited to a shaft body provided with a hollow portion as long as it is a shaft body that can be interlocked and connected to the detachable side rotation shaft 51 and the like, and may be a solid shaft body.

  Thus, since the rotors 40, 40 at the left and right end portions are detachable, the left-right width of the leveling device 4 can be shortened as necessary.

  Therefore, for example, when the rice transplanter is transported on the loading platform of the transport vehicle, the left and right rotors 40 and 40 are removed as described above to shorten the lateral width of the leveling device 4. The leveling device 4 can be prevented from hindering the loading / unloading work.

  In addition, when the rice transplanter for 6-row planting shown in this embodiment is placed on a carrier bed and transported, the left and right widths of the rice transplanter are within the width of the carrier bed even when the rotors 40 and 40 are not removed. Even if you do not remove 40,40, it will not cause any trouble. However, even if it is a rice transplanter with six or fewer plants, if you transport a rice transplanter with a longer rotor width or a rice planter with six or more plants, for example, an eight-row planter, you do not have to remove the rotors 40 and 40. In such a case, the rotor mounting / removal structure is particularly effective.

  Moreover, since the fitting recess 53a formed on one abutting surface 46a and the fitting convex portion 56a formed on the other abutting surface 55a are fitted to face each other, the outer side of the fixed rotation shaft 50 Without causing any misalignment, just abutting the detachable inner end receiver 54 that receives the inner end of the detachable rotation shaft 51 to the fixed outer rim receiver 52 that receives the end in the axial direction. It can be connected easily and reliably.

  Furthermore, the detachable side rotation shaft 51 is supported at both ends by the detachable side outer end receiving body 58 and the detachable side inner end receiving body 54 connected via the connecting body 59, so that the detachable side rotation is possible. The rigidity for supporting the shaft 51 can be improved.

  As a result, in the rotor rotation shaft 39 formed to have a wide left and right width, it is possible to firmly support the attachment / detachment-side rotation shaft 51 at the outer end, which is likely to be loose and bend, and is attached to the attachment / detachment-side rotation shaft 51. The leveling function of the rotor 40 can be ensured satisfactorily.

  The rotor 40 includes a plurality (six in this embodiment) of rotor main pieces 70 that extend in the left-right direction and have a scraping function, and these rotor main pieces 70 are connected to the fixed rotation shaft 50 or the detachable rotation shaft. A plurality of sets (three sets in the present embodiment) of a pair of fixing pieces 71 and 71 fixed to the outer periphery of 51 are provided.

  In addition, the pair of fixed pieces 71 and 71 located on the left outermost side and the pair of fixed pieces 71 and 71 located on the right outermost side are within a certain width W1, W1 from the left and right end portions of the rotor main piece 70, respectively. The fixed recesses 71 and 71 and the rotor main piece 70 are formed so as to form fitting recesses 72 and 72 into which right and left sides of an output shaft housing 75 of a transmission case 41 described later are fitted. Reference numeral 73 denotes a connecting bolt that connects the fixings 71 and 71 together.

  In this way, the plurality of rotor pieces 70 attached to the outer periphery of the fixed-side rotation shaft 50 or the detachable-side rotation shaft 51 are moved on the field scene while rotating about the respective rotation shafts 50 and 51. By doing this, it is possible to level the ground by scratching the farm scene.

  As shown in FIGS. 4 and 6 to 9, the transmission case 41 is communicated with a cylindrical output shaft housing 75 whose axis is directed in the left-right direction, and a central portion of the front peripheral surface of the output shaft housing 75. A case main body 77 is formed from a cylindrical input shaft accommodating body 76 whose axis is directed forward.

  And, in the output shaft housing 75, the transmission output shaft 78 with the axis line directed in the left-right direction is supported through the bearings 79 and 80, while being rotatably supported, in the input shaft housing 76 through the bearing 82. A transmission input shaft 81 having an axis line in the front-rear direction is rotatably supported, and a transmission output gear 84 attached to a rear end portion of the transmission input shaft 81 is attached to a transmission input gear 83 attached to a middle portion of the transmission output shaft 78. Are engaged.

  Further, the left and right end portions of the transmission output shaft 78 are interlocked and connected to the inner portions of the hollow shafts 50a and 50a of the fixed rotation shafts 50 and 50 adjacent to the left and right, respectively, while the front end of the transmission input shaft 81 The portion is linked to the rear end portion of the leveling shaft 37 through a universal joint 85.

  Here, the left and right side end portions 75a, 75a of the output shaft housing 75 are fitted in the fitting recesses 72, 72 of the rotors 40, 40 adjacent to the left and right, respectively. 75a and the left and right end portions 70a, 70a of the rotor main piece 70 are overlapped with a constant width W2, W2 on the inner and outer sides, and in this state, the transmission output is horizontally mounted in the output shaft housing 75. The shaft 78 and the fixed rotation shafts 50 and 50 are interlocked and connected on the same axis.

  In addition, seal materials 86, 86 are provided in the left and right end portions 75a, 75a of the output shaft housing 75, respectively, and the seal materials 86, 86 are recessed portions 72 for insertion formed at the outer end portions of the rotors 40, 40. 72 is located inside.

  In this way, the power from the prime mover 11 is transmitted to the transmission mechanism 36 → the leveling transmission shaft 37 → the universal joint 85 → the transmission input shaft 81 → the transmission output gear 84 → the transmission input gear 83 → the transmission output shaft 78 → the fixed side rotation. The shafts 50 and 50 are transmitted to the attachment / detachment-side rotation shafts 51 and 51, and the rotor 40 attached to the outer periphery of each of the rotation shafts 50, 50, 51 and 51 is rotated so that the leveling work can be performed. .

  At this time, the left and right side end portions 75a and 75a of the output shaft housing 75 are fitted in the fitting recesses 72 and 72 formed at the outer end portions of the rotors 40 and 40 adjacent to the left and right, respectively. The left and right widths of the ungraded portion that is not leveled by the rotors 40 and 40 (the left and right end portions 70a of the rotor pieces 70 and 70 adjacent to the left and right shown in FIG. , 70a, the interval W3) can be reduced. In addition, the transmission function of the transmission case 41 can be ensured satisfactorily.

  Furthermore, the sealing materials 86, 86 provided in the left and right end portions 75a, 75a of the output shaft housing 75 are disposed in the fitting recesses 72, 72 formed in the outer end portions of the rotors 40, 40. Therefore, it is possible to prevent the broken ends of the straw floating in the field from wrapping around the sealing materials 86, 86, and to ensure a good leveling function of the leveling device.

[Description of leveling shaft 37]
The leveling transmission shaft 37 is connected to the rear end portion of the front half forming shaft 89 extending in the front-rear direction and the front end portion of the rear half forming shaft 90 extending in the front-rear direction via a universal joint 91, The front half forming shaft 89 is connected to the projecting end portion of the leveling output shaft 88 in conjunction with the front end portion, and the shaft support piece 92 attached to the lower surface of the rear axle case 14 is supported in the middle portion and arranged in a substantially horizontal state. On the other hand, the rear half forming shaft 90 is interlocked and connected to the transmission input shaft 81 of the transmission case 41 disposed below through a universal joint 85.

The side view of the rice transplanter concerning the present invention. Side explanatory drawing of the leveling device of the same rice transplanter. Plane explanatory drawing of the same leveling apparatus. Side surface explanatory drawing of a transmission mechanism part. Plane explanatory drawing of the transmission mechanism part. The front view of the transmission mechanism part. FIG. 7 is a cross-sectional view taken along line I-I in FIG. 6. Cross-sectional bottom explanatory drawing of a transmission mechanism part. The partially cutaway front explanatory view of the transmission case of the leveling device. The partially cutaway front explanatory drawing of the attachment-and-detachment side rotation axis of the leveling device.

Explanation of symbols

A rice transplanter 1 traveling unit 2 planting unit 3 lifting mechanism 4 leveling device
35 Leveling body
36 Transmission mechanism
37 Leveling shaft
38 Lifting support machine frame
39 Rotor rotation axis
40 rotor
41 Transmission case

Claims (2)

In the rice transplanter where the planting part is connected to the rear of the traveling part so as to freely move up and down, and the leveling device is attached to the planting part,
The ground leveling device is interlocked and connected to a prime mover portion provided in a traveling portion via a transmission mechanism portion, and a clutch mechanism is provided in the transmission mechanism portion, and a clutch mechanism cutting operation is interlocked with an ascending operation of a planting portion. An interlocking mechanism that interlocks the operation of the clutch mechanism with the descending operation of the planting part is provided. The connecting wire is connected to a connecting pin of an operating arm provided in the clutch mechanism, and a connecting piece formed with a tip side long hole extending in the front-rear direction is connected to the tip of the connecting wire. When the connecting piece is detachably connected to the connecting pin of the operating arm , and the connecting piece is connected to the connecting pin of the operating arm, the on / off operation of the clutch mechanism is linked to the raising / lowering operation of the planting portion, and the connecting piece The If not connected to the connecting pin of the rotating arm is a structure in which Ru actuates the leveling device in a state of increasing the planting unit without interlocking the switching on and off operation of the clutch mechanism to the lifting operation of the planting unit,
The transmission mechanism section includes an input shaft for inputting power from the prime mover section, an output shaft for outputting power from the input shaft to the leveling device, and an intermediate between the output shaft and the input shaft. A shaft, and a clutch mechanism provided on the intermediate shaft,
The input shaft penetrates between the front and rear walls of the transmission mechanism portion, and the transmission shaft and the rear input shaft are connected in a coaxial manner, and an output gear is attached to the outer peripheral surface of the input shaft.
The output shaft is installed horizontally across the front and rear walls of the transmission mechanism,
The intermediate shaft is horizontally placed between the front wall of the clutch case forming body connected to the front wall of the transmission mechanism portion and the rear wall of the transmission mechanism portion,
A clutch mechanism and an intermediate output gear are attached to the intermediate shaft on which a relatively smaller torque is acting than the output shaft, and the output gear attached to the input shaft is engaged with the intermediate input gear attached to the clutch mechanism. A rice transplanter characterized in that an intermediate output gear is engaged with an input gear attached to the output shaft . The transmission mechanism section includes an input shaft for inputting power from the prime mover section, an output shaft for outputting power from the input shaft to the leveling device, and an intermediate between the output shaft and the input shaft. A shaft, and a clutch mechanism provided on the intermediate shaft,
The input shaft is formed in a cylindrical shape with the axis line in the front-rear direction, penetrated between the front and rear walls of the transmission mechanism part formed in a flat box shape in the front-rear direction, and freely rotatable around the axis line The rear end of the transmission shaft is fitted into the input shaft from the front, and the front end of the rear input shaft is fitted from the rear so that the transmission shaft and the rear input shaft are connected via the input shaft. Coaxially linked and connected, an output gear is attached to the outer peripheral surface of the input shaft,
The output shaft is formed with the axis line directed in the front-rear direction, and is horizontally mounted between the front and rear walls of the transmission mechanism portion so as to be rotatable around the axis line, and an input gear is attached to the output shaft,
The intermediate shaft is formed between the front wall of the clutch case forming body and the rear wall of the transmission mechanism portion, which is formed with the axis line directed in the front-rear direction and bulged forward on the front wall of the transmission mechanism portion. A clutch mechanism and an intermediate output gear are attached to an intermediate shaft that is horizontally mounted around the axis so that a relatively small torque is applied to the output shaft, and an intermediate input gear attached to the clutch mechanism is attached to the intermediate input gear. 2. The rice transplanter according to claim 1, wherein an output gear attached to the input shaft is engaged, and an input gear attached to the output shaft is engaged with an intermediate output gear.

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