TW201531218A - Seedling transplanter - Google Patents

Abstract

The present disclosure provides a seedling transplanter that prevents excess fertilizer consumption and the occurrence of unfertilized regions, so as to perform proper fertilization operations and to improve fertilization operability. A seedling planting portion is liftably disposed at a rear portion of a traveling vehicle body. A float is provided on the seedling planting portion and is in contact with the surface of a farm field. A fertilizing device is provided to supply fertilizers upon the farm field. An angle detection component is provided to detect the rotation angle of the float. A rotation interlocking mechanism is comprised for interlocking the rotation of the traveling vehicle body and switching the lifting of the seedling planting portion and the actuation of the seedling planting portion and the fertilizing device. A fertilizing transmission on-off member (422) is provided to switch the actuation of the fertilization device. A control device is provided to switch the fertilizing transmission on-off member (422) to a connected state when the rotation angle detected by the angle detection device is within a predetermined angle range due to the descend of the seedling planting portion via the rotation interlocking mechanism.

Description

Seedling transplanter

The present invention relates to a seedling transplanting machine equipped with a planting device for planting seedlings into farmland.

In the conventional seedling transplanting machine, a technique is known in which the load of the planting device is controlled in conjunction with the rotating operation of the body in the back and forth planting operation of the farmland, thereby reducing the burden on the operator. In the following Patent Document 1, a seedling transplanter that is applicable to a wide range of conditions is provided, and a control unit having a plurality of rotation modes controls the planting device in conjunction with the rotation of the body in accordance with the situation of the site and the contents of the work. .

According to this configuration, since a preferable rotation mode can be selected when the seedling transplanter rotates, a rotation operation suitable for the condition can be performed.

[Previous Technical Literature] [Patent Document]

Patent Document 1: Japanese Invention Patent No. 4543247

However, the seedling transplanting machine described in Patent Document 1 has a configuration in which the fertilizing device is actuated before the operation of the planting device at the end of the rotation of the operation member of the rotating operation member, and the fertilizer is supplied simultaneously with the start of planting of the seedling. Therefore, after the rotary operation member is operated to the rotation end position, the planting device is operated after the body has advanced by a predetermined distance. Therefore, there is a problem that the fertilizer is supplied first and the excess fertilizer is consumed.

Further, there is a problem in that if the body reaches the planting start position of the seedling earlier than the fertilizer from the storage hopper of the fertilizer application device to the farmland via the fertilizing hose, a section in which the fertilizer is not supplied is generated.

An object of the present invention is to provide a seedling transplanting machine which is capable of preventing the consumption of excess fertilizer and preventing the occurrence of a section in which no fertilizer is supplied, and performing an appropriate fertilizing operation to improve the workability of fertilization.

The above problems of the present invention are solved by the following solutions.

The invention described in the first aspect is a seedling transplanting machine in which a seedling planting portion (4) is provided in a movable manner in a rear portion of the traveling vehicle body (2); and a floating contact with the farmland surface is provided in the seedling planting portion (4) Body (55); a fertilizing device (5) for supplying fertilizer to the farmland; an angle detecting member (162) for detecting a rotation angle of the floating body (55); and a seeding planting portion for switching the rotation of the traveling body (2) The lifting and lowering, and the rotation linkage mechanism (T) for the operation of the seedling planting part (4) and the fertilizing device (5); and the fertilizing transmission for turning on/off the operation of the fertilizing device (5) The opening member (422) is provided with a control device (163) for causing the seedling planting portion (4) to lower the detection angle of the angle detecting member (162) within a predetermined angle range by the rotation linkage mechanism (T) being lowered The aforementioned fertilization transmission on/off member (422) is in an on state.

According to a second aspect of the invention, in the seedling transplanting machine according to the first aspect of the invention, the seeding opening/closing member (25a) for turning on/off the planting operation of the seedling planting portion (4) is provided; The device (163) is configured to activate the seeding on/off member (25a) and the fertilization transmission on/off member (422) when the seedling planting portion (4) is raised by the rotation linkage mechanism (T). When the seedling planting portion (4) is lowered and the angle detected by the angle detecting member (162) is within a predetermined angle range, the planting actuating on/off member (25a) is kept disconnected. The fertilization transmission on/off member (422) is in an on state.

The invention according to claim 1 or 2, wherein the traveling vehicle body (2) is provided with left and right rear wheels (11, 11); and the left and right rear wheels (11, 11) are provided. Supply the left and right of the driving force a rear wheel gear box (200L, 200R); a fertilizing transmission for supplying a driving force to the fertilizing device (5) via the rear wheel gear box (200L, 200R) on one of the left and right rear wheel gear boxes (200L, 200R) The member (401) constitutes a fertilization transmission mechanism (420) with the aforementioned fertilization transmission ON/OFF member (422) for turning on/off the transmission to the fertilization transmission member (401).

The invention described in claim 4 is the seed transplanting machine according to the third aspect, wherein the fertilization transmission actuator (426a) for performing the on/off of the fertilization transmission on/off member (422) is provided; The fertilization transmission actuator (426a) operates a fertilization transmission switching member (428); the control device (163) is configured to satisfy the angle detecting member (162) when the rotation linkage mechanism (T) is actuated When the detection angle is within a predetermined angle range, or when the planting operation on/off member (25a) is turned on or any of the fertilization transmission switching members (428) is turned on, the fertilizing transmission is performed. The actuator (426a) is actuated to cause the fertilization transmission ON/OFF member (422) to be in an ON state; the one end of the Fertilizing Transmission Member (401) is directed to the outside of the rear wheel gearbox (200L, 200R) In the fertilization transmission member (401), a manual operation member (426) for performing fertilizer supply of the fertilizer application device (5) by manual operation is provided at a portion protruding from the rear wheel gear case (200L, 200R).

The seed transplanting machine according to claim 4, wherein the rotary operating member that steers the traveling vehicle body (2) is provided. (34); the left and right front wheels (10, 10) are provided in the traveling vehicle body (2); the directions of the left and right front wheels (10, 10) are changed in conjunction with the operation of the rotating operation member (34) and a steering mechanism (S) in which the side clutch (87) of the rear wheel (11) on the inner side of the rotation is rotated, and a rotation direction detecting member that detects the rotational operation direction of the aforementioned rotary operation member (34) 193) The control device (163) is configured such that a rotation direction detected by the rotation direction detecting member (193) is a rear wheel gear case (200R) provided with left and right sides of the fertilization transmission member (401) When the inner side is rotated, the operation is performed earlier than when the rear wheel gear case (200L) on the other left and right sides becomes the inner side of the rotation, and the fertilizing transmission actuator (426a) puts the fertilization transmission ON/OFF member (422) in the ON state. Timing.

The seedling transplanting machine according to claim 1 or 2, wherein the traveling vehicle body (2) is provided with an engine (20); and the engine (20) is disposed toward the front wheel (10, 10) and thereafter. a sub-transmission device (571) that transmits the wheel (11, 11); an auxiliary shift switching operation member (17) that performs a switching operation of the sub-transmission device (571); and an operation of the sub-shift switching operation member (17) The sub-shift operation position detecting member (17b) for detecting the position; forming the sub-transmission device (571) to block the transmission from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) The neutral position (N) of the aforementioned auxiliary shift switching operation member (17) to the traveling neutral state and the aforementioned planting actuation ON/OFF member (25a) in the OFF state, and to the side of the neutral position (N) Form cut Switching to the state in which the driving of the front wheels (10, 10) and the rear wheels (11, 11) is stopped, the planting operation on/off member (25a) is turned on, and the planting device (52) is actuated. The stop planting position (W) of the auxiliary shift switching operation member (17) in the stopped planting state is set, and a stop planting position detecting member for detecting that the auxiliary shift switching operation member (17) is located at the stop planting position (W) is provided ( 430); the control device (163) is configured to detect that the sub-shift switching operation member (17) is operated to stop the planting position (W) by the stop-planting position detecting member (430), and the floating body (55) When the rotation angle is within a predetermined angle range, the planting operation on/off member (25a) that turns on/off the planting operation of the seedling planting portion (4) is turned on, and even if the above-described stop planting is used The position detecting member (430) detects that the sub-shift switching operation member (17) is operated to stop the planting position (W), and the rotation angle of the floating body (55) detected by the aforementioned angle detecting member (162) is at a predetermined angle When the range is outside, the aforementioned planting operation is turned on/off The member (25a) is in an open state.

The seed transplanting machine according to claim 1 or 2, wherein the traveling vehicle body (2) is provided with an engine (20); and the engine (20) is disposed toward the front wheel (10, 10) and thereafter. a sub-transmission device (571) that transmits the wheel (11, 11); an auxiliary shift switching operation member (17) that performs a switching operation of the sub-transmission device (571); and an operation of the sub-shift switching operation member (17) a sub-shift operation position detecting member (17b) for detecting the position; forming a transmission of the sub-transmission device (571) from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) The neutral position (N) of the aforementioned auxiliary shift switching operation member (17) that is switched to the traveling neutral state and the aforementioned planting actuation ON/OFF member (25a) is in the OFF state, and at the neutral position (N) The side formation is switched to the planting actuating on/off member (25a) in an on state in a state where the driving of the front wheels (10, 10) and the rear wheels (11, 11) is stopped, so that the planting device is (52) Stopping the planting position (W) of the auxiliary shift switching operation member (17) in the stopped planting state, and setting the stop planting position detection of the detecting sub-shift switching operation member (17) at the stop planting position (W) a member (430); a stepless shifting device (23) that is driven from the engine (20) to the auxiliary shifting device (571); and a main shifting switching operating member that provides a shifting operation to the stepless shifting device (23) (16) Providing a main shift operation amount detecting member (16b) that detects an operation of the main shift switching operation member (16); and providing the aforementioned stepless shifting device based on the detection of the main shift operation amount detecting member (16b) 23) Trunnion (295) rotating trunn actuation (103); a trunnion detecting member (113) for detecting a rotational position of the trunnion (295); wherein the control device (163) is configured to be detected by the main shift operation amount detecting member (16b) The main shift switching operation member (16) is operated to a neutral position that stops the travel of the aforementioned traveling body (2), and detects the rotation angle of the floating body (55) within a predetermined angle range by the aforementioned angle detecting member (162) When the auxiliary shift switching operation member (17) is operated to stop the planting position (W), the planting operation ON/OFF member (25a) is turned on.

The seed transplanting machine according to claim 3, wherein the traveling vehicle body (2) is provided with an engine (20); and the engine (20) is provided toward the front wheel (10, 10) and the rear wheel ( 11, 11) a sub-transmission device (571) of the transmission; an auxiliary shift switching operation member (17) for performing a switching operation of the sub-transmission device (571); and an operation position of the sub-shift switching operation member (17) is set The detected sub-shift operation position detecting member (17b); forming the sub-transmission device (571) to block the transmission from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) to switch to travel The neutral position and the neutral position (N) of the aforementioned auxiliary shift switching operation member (17) in which the aforementioned planting actuation ON/OFF member (25a) is in the OFF state, and the side of the neutral position (N) is formed. Switching to the state in which the driving operation of the front wheel (10, 10) and the rear wheels (11, 11) is stopped, the planting operation opening/closing member (25a) is turned on, and the planting device (52) is actuated. Stopping the planting position (W) of the aforementioned auxiliary shift switching operation member (17) in the stopped planting state, and setting The sub-shift switching operation member (17) is located at the stop planting position detecting means (430) at the stop planting position (W); the control device (163) is configured to be detected by the stop-planting position detecting member (430) When the auxiliary shift switching operation member (17) is operated to stop the planting position (W), and the rotation angle of the floating body (55) is within a predetermined angle range, the seeding operation of the seedling planting portion (4) is turned on/off. The open planting operation opening/closing member (25a) is in an ON state, and even if it is detected by the aforementioned stop planting position detecting member (430) that the sub-shift switching operation member (17) is operated to stop the planting position (W), By the aforementioned angle detecting member (162) When the detected rotation angle of the floating body (55) is outside the predetermined angle range, the planting operation ON/OFF member (25a) is placed in the OFF state.

The seed transplanting machine according to claim 3, wherein the traveling vehicle body (2) is provided with an engine (20); and the engine (20) is provided toward the front wheel (10, 10) and the rear wheel ( 11, 11) a sub-transmission device (571) of the transmission; an auxiliary shift switching operation member (17) for performing a switching operation of the sub-transmission device (571); and an operation position of the sub-shift switching operation member (17) is set The detected sub-shift operation position detecting member (17b); forming the sub-transmission device (571) to block the transmission from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) to switch to travel The neutral position and the neutral position (N) of the aforementioned auxiliary shift switching operation member (17) in which the aforementioned planting actuation ON/OFF member (25a) is in the OFF state, and switching is formed on the side of the neutral position (N) When the driving of the front wheels (10, 10) and the rear wheels (11, 11) is stopped, the planting operation opening/closing member (25a) is turned on to operate the planting device (52). Stopping the planting position (W) of the aforementioned auxiliary shift switching operation member (17) in the planting state, and setting the inspection The auxiliary shift switching operation member (17) is located at the stop planting position (W) of the stop planting position detecting member (430); and the stepless shifting device (23) for driving from the engine (20) toward the auxiliary shifting device (571); a main shift switching operation member (16) for performing a shifting operation on the stepless shifting device (23); a main shift operating amount detecting member (16b) for detecting an operation of the main shift switching operating member (16); setting According to the main shift The trunnion actuator (103) for detecting the trunnion (295) of the aforementioned stepless transmission (23) by detecting the operation amount detecting member (16b); and detecting the rotational position of the trunnion (295) The trunnion detecting member (113); the control device (163) is configured to detect that the main shift switching operation member (16) is operated to cause the traveling body (2) by the main shift operation amount detecting member (16b) When the angle detecting member (162) detects that the rotation angle of the floating body (55) is within a predetermined angle range, the auxiliary shift switching operation member (17) is operated to stop the planting position. (W), the planting operation ON/OFF member (25a) is placed in an ON state.

According to the invention of the first aspect, when the floating body (55) is grounded by the angle detecting member (162) during rotation, the fertilization transmission ON/OFF member (422) is turned on to cause the fertilizer application device (5). By actuating, the fertilizing device (5) can be actuated to start the supply of the fertilizer before the start of the seedling cultivation after the rotation, so that the fertilizer reaches the farmland at the start of the planting of the seedling after the rotation, thereby preventing the unfertilized portion. The production.

According to the invention described in the second aspect, in addition to the inventive effects described in the first aspect, the actuating on/off member (25a) and the fertilization transmission on/off member (422) are turned off when the rotation is performed. The operation of the seedling planting part (4) and the fertilizing device (5) is stopped, thereby preventing the seedling planting part (4) from releasing fertilizer at a position away from the farmland surface, and preventing the fertilizer The spread.

Further, when the angle detecting member (162 detects that the floating body (55) is grounded, the fertilization transmission ON/OFF member (422) is placed in a state where the planting actuation ON/OFF member (25a) is OFF. The fertilizing device (5) is actuated in an on state, whereby the fertilizing device (5) can be actuated to start the supply of the fertilizer before the start of the seedling after the rotation, so that the fertilizer arrives at the start of the seedling after the rotation Farmland, thus preventing the generation of areas where fertilizer is not supplied.

According to the invention of the third aspect, in addition to the inventive effects described in the first aspect or the second aspect, the fertilization transmission member (401) and the fertilizing transmission are turned on/off by the rear wheel gearbox (200L, 200R) on the left and right sides. The opening member (422) constitutes the fertilization transmission mechanism (420), so that the application/disconnection of the fertilizer application device (5) can be performed independently, so that the supply amount of the fertilizer can be prevented from being more or less.

Further, by providing the fertilization transmission member (401) and the fertilization transmission ON/OFF member (422) on the rear wheel gear case (200L, 200R) that transmits the driving force to the rear wheels (11, 11), the shortening can be shortened From the rear wheel gearbox (200L, 200R) to the drive path of the fertiliser device (5).

According to the invention of the fourth aspect, in addition to the effects of the invention described in the third aspect, the fertilization is performed by the fertilization actuator (426a). Turning on/off the transmission ON/OFF member (422), thereby enabling the on/off of the fertilization transmission ON/OFF member (422) to be automated, thereby improving work efficiency and reliably performing the fertilizer application device The on/off of (5) prevents the supply of fertilizer from being more or less.

Next, by causing one end of the fertilization transmission member (401) to protrude toward the outside of the rear wheel gear case (200L, 200R), and the manual operation member (426) is provided at the protrusion, the fertilizer application device can be manually operated. (5) Since the supply of the fertilizer is performed by the operation, the setting of the supply amount of the fertilizer can be confirmed without moving the traveling vehicle body (2), and the excessive fuel consumption can be suppressed.

Further, by providing the manual operation member (426) on the fertilization transmission member (401) protruding from the rear wheel gear case (200L, 200R), the transmission path to the fertilizer application device (5) can be shortened, thereby reducing the operator The force that operates the manually operated member (426).

According to the invention of the fifth aspect, in addition to the effects of the invention described in the fourth aspect, the fertilizer transmission actuator is applied when the rear wheel gear case (200R) provided on the left and right sides of the fertilizer transmission member (401) is rotated inside. (426a) The timing at which the fertilization transmission ON/OFF member (422) is in the ON state is advanced, and the supply of the fertilizer is started at the same timing as when the left and right rear wheel gearboxes (200R) are outside the rotation. It can prevent the supply of fertilizer more or less.

According to the invention of the sixth aspect, in addition to the effects of the invention described in the first aspect or the second aspect, even when the floating body (55) is not grounded, even if the sub-shifting operation member (17) is operated, the switching operation member (17) is not switched to the stopped planting state. Therefore, it is possible to prevent the seedling planting portion (4) from carrying out seedling planting operations on top of the farmland surface due to erroneous operation, thereby preventing consumption of excess seedlings.

Further, when the shift switching operation member (17) is operated to stop the planting position (W), the seedling planting portion (4) is actuated, whereby seedlings can be planted without moving the traveling vehicle body (2) on the spot, so that it is easy to seedling The planting position is consistent with the adjacent columns, and the planting accuracy of the seedlings is improved.

According to the invention of claim 7, in addition to the inventive effects described in the first aspect or the second aspect, when the floating body (55) is in a grounded state and the main shift switching operation member (16) is in the neutral position, the auxiliary shift switching operation member is (17) When the planting position (W) is stopped, the seedling planting part (4) is operated, whereby the seedlings can be planted without moving the traveling body (2) on the spot, so that the planting position of the seedlings is easily aligned with the adjacent columns. And improve the planting accuracy of the seedlings.

Further, it is possible to prevent the seedling planting portion (4) from carrying out the planting operation of the seedlings on the upper side than the farmland surface due to the erroneous operation, thereby preventing the consumption of the excess seedlings.

According to the invention of claim 8, in addition to the inventive effects described in the third aspect, if the floating body (55) is not grounded, even if it is a pair The operation of the shift switching operation member (17) does not switch to the stop planting state, thereby preventing the seedling planting portion (4) from planting the seedlings above the farmland surface due to erroneous operation, thereby preventing unnecessary seedlings. Consumption.

Further, when the sub-shift switching operation member (17) is operated to stop the planting position (W), the seedling planting portion (4) is actuated, so that it is possible to plant seedlings without moving the traveling vehicle body (2) on the spot, so that it is easy to make The planting position of the seedlings is consistent with the adjacent columns, and the planting accuracy of the seedlings is improved.

According to the invention of claim 9, in addition to the inventive effects described in the third aspect, when the floating body (55) is in a grounded state and the main shift switching operation member (16) is in the neutral position, the sub-shift switching operation member is 17) When the planting position (W) is stopped, the seedling planting part (4) is operated, so that the seedlings can be planted without moving the traveling body (2) on the spot, so that it is easy to match the planting position of the seedlings with the adjacent column. Improve the planting accuracy of the seedlings.

Further, when the sub-shift switching operation member (17) is operated to stop the planting position (W), the seedling planting portion (4) is actuated, whereby the seedling body can be planted without moving the traveling vehicle body (2) on the spot, so that it is easy to make The planting position of the seedlings is consistent with the adjacent columns, and the planting accuracy of the seedlings is improved.

1‧‧‧Twisting machine

2‧‧‧Traveling body

3‧‧‧ Lifting linkage mechanism

4‧‧‧ Seedling Department

5‧‧‧ fertilizing device

10‧‧‧ front wheel

11‧‧‧ Rear wheel

12‧‧‧Transmission box

13‧‧‧ Front wheel end housing

15‧‧‧Main frame

16‧‧‧Main shifting operation member

16a, 17a‧‧‧ Guide

16aa‧‧‧Neutral position

16b‧‧‧Main shifting operation detecting member

17‧‧‧Auxiliary shifting operation member

17b‧‧‧Sub-shift operating position detecting member

19‧‧‧ Seedlings

20‧‧‧ engine

21‧‧‧With gearing

23‧‧‧Stepless speed changer

24‧‧‧planting clutch motor

25‧‧‧ Planting clutch housing

25a‧‧‧Implanting on/off components

25ab‧‧‧planting on/off components

26‧‧‧ Planting drive shaft

27‧‧‧ground rotor

27a‧‧‧First ground preparation rotor

27b‧‧‧Second ground rotor

30‧‧‧ engine cover

31‧‧‧Operating seats

32‧‧‧ front cover

34‧‧‧Rotary operating components

35‧‧‧ bottom pedal

38‧‧‧ spare seedling frame

40‧‧‧Uplink

41‧‧‧lower connecting rod

42L, 42R‧‧‧ link base frame

43‧‧‧ longitudinal link

44‧‧‧Connected shaft

46‧‧‧lifting hydraulic cylinder

50‧‧‧ planting gearbox

51‧‧‧ Seedling Terrace (Miao Miao Department)

51a‧‧‧Miao export

51b‧‧‧Miao conveyor belt

52‧‧‧planting device

52a‧‧‧ seedling tools

53‧‧‧Electric motor for blower

55‧‧‧ floating body

56‧‧‧ side buoy

57‧‧‧Intermediate buoy

58‧‧‧Blowers

59‧‧‧Air chamber

60‧‧‧ Fertilizer box

61‧‧‧Send out

62‧‧‧ fertilizing hose

64‧‧‧Opener

69‧‧‧ sloping plate

69a‧‧‧Roller slot

70‧‧‧Operator panel

80‧‧‧ display panel

82‧‧‧Field clutch switching member

82a‧‧1 column and 2 rows of field clutch switching members

82b‧‧3 columns and 4 rows of field clutch switching members

82c‧‧‧5 and 6 row raft clutch switching members

82d‧‧‧7 and 8 rows of field clutch switching members

83‧‧‧ monitor

84‧‧‧Rotating linked lights

86‧‧‧Clutch operating arm

87‧‧‧ side clutch

90‧‧‧Rotary linkage switching member

92‧‧‧ Planting began to adjust the dial

94‧‧‧ Height adjustment dial for the ground rotor

100‧‧‧ base frame

103‧‧‧Tear motor electric motor

110‧‧‧ brake pedal

110a‧‧‧ brake pedal sensor

113‧‧‧Tear detection component

161‧‧‧Electromagnetic valve

162‧‧‧ Angle detection component

163‧‧‧Control device

174‧‧‧ Output shaft

175‧‧‧ steering arm

176‧‧‧ rod

177‧‧‧Acoustic roller

178‧‧‧cut section

178a‧‧‧Left side

178b‧‧‧ right side

179‧‧‧ slaves

180‧‧‧ rod

193‧‧‧Rotation direction detecting member

200‧‧‧ Rear wheel gearbox

200L‧‧‧ left rear gearbox

200R‧‧‧Rear gearbox on the right

205‧‧‧Rear wheel rotation sensor

230L‧‧‧First drive shaft

230R‧‧‧second drive shaft

247‧‧‧Cylinder block

247a‧‧‧Hydraulic pump side cylinder

247b‧‧‧Hydraulic motor side cylinder

248‧‧‧Piston

248a‧‧‧Piston on the side of the hydraulic pump

248b‧‧‧Piston on the side of the hydraulic motor

248c‧‧‧Spiral groove

248d‧‧‧ latticed trough

248e‧‧‧Wedge-shaped groove

266, 267‧‧ ‧ hydraulic closed circuit

271‧‧‧ mouth block

272‧‧‧Stepless gearbox housing

273‧‧‧ booster pump

274‧‧‧ input shaft

275‧‧‧ Output shaft

277‧‧‧Joining plate

278‧‧‧ thrust plate

280‧‧‧ oil filter

281‧‧‧Main safety valve

282a, 282b‧‧‧ field valve

283‧‧‧Neutral valve

285‧‧‧High pressure safety valve

295‧‧‧ trunnion

296‧‧‧ crank arm

298‧‧‧ pin sliding parts

301‧‧‧Rotor drive shaft

311‧‧‧Chain

312‧‧‧second gear

320‧‧‧ground clearance mechanism

321aL‧‧‧First bevel gear

321aR‧‧‧First bevel gear

321L‧‧‧first input shaft

321R‧‧‧second input shaft

322‧‧‧Regular rotor on/off clutch

322a‧‧‧锷

322b‧‧‧First clutch jaw

323‧‧‧ force spring

324aL, 324aR‧‧‧ protrusion

324bR‧‧‧Switching the root of the shifter

324b‧‧‧ root of the displacement device

324L, 324R‧‧‧Switching Displacement

325‧‧‧First gear

325a‧‧‧second clutch jaw

326a‧‧‧Switching linkage mechanism

330L‧‧‧second bevel gear

330R‧‧‧second bevel gear

331L, 331R‧‧‧ small diameter gear

332L, 332R‧‧‧ large diameter gear

340L, 340R‧‧‧ second rotating shaft

341L‧‧‧left rear axle

341R‧‧‧Right rear axle

401‧‧‧ Fertilizer transmission components

412‧‧‧fourth bevel gear

420‧‧‧ Fertilization transmission mechanism

422‧‧‧ Fertilization drive on/off member

422a‧‧ Fertilization Department

422b‧‧‧ third clutch jaw

423‧‧‧ Fertilizing spring

425‧‧‧third bevel gear

425a‧‧‧4th clutch jaw

426‧‧‧Manually operating components

426a‧‧ fertilization drive actuator

427‧‧‧ Cable

428‧‧ fertilization drive switch

430‧‧‧Stop planting position detection component

432‧‧‧Selecting switching components

571‧‧‧Auxiliary shifting device

572‧‧‧Auxiliary shifting shaft

573‧‧‧Switching components

574‧‧‧ Planting speed transmission components

575‧‧‧ on-road speed transmission components

576‧‧‧Relay shaft

581‧‧‧ brake device

582‧‧‧planting the main drive shaft

583‧‧‧Transmission input shaft

584‧‧‧ front axle

585‧‧‧Differential device

586‧‧‧ side clutch shaft

A‧‧‧Variable displacement hydraulic pump

B‧‧‧Fixed displacement hydraulic motor

E‧‧‧ arrow

N‧‧‧Neutral position

T‧‧‧Rotary linkage mechanism

U‧‧‧Sliding part on the side

W‧‧‧Stop planting location

Figure 1 is a side view of a passenger type rice transplanter.

Figure 2 is a plan view of the passenger type rice transplanter.

Fig. 3 is a perspective view showing a steering structure of left and right front wheels of the passenger type rice transplanter.

4(a) is a plan view of a display panel of the passenger-type rice transplanter, and FIG. 4(b) is a plan view of the operation panel.

Fig. 5 is a block diagram showing a control device of the passenger type rice transplanter.

Fig. 6 is a schematic plan view showing a transmission structure of a passenger-type rice transplanter.

Fig. 7 is a schematic plan view showing a transmission structure of a driving force inside the left rear wheel gear case of the passenger type rice transplanter.

Fig. 8 is a schematic plan view showing a transmission structure of a driving force inside the right rear wheel gear case of the passenger type rice transplanter.

Figure 9 is a flow chart of the control device of the passenger type rice transplanter.

Figure 10 is a plan view showing the transmission mechanism for driving the drive wheel in the transmission case of the passenger type rice transplanter.

Fig. 11 is an operation explanatory view of the sub-transmission mechanism in the transmission case of the passenger-type rice transplanter.

Fig. 12 is a transmission mechanism diagram of the operation position (road speed) of the auxiliary shift switching operation member.

Fig. 13 is a transmission mechanism diagram of the operation position (planting work speed) of the sub-shift switching operation member.

Fig. 14 is a transmission mechanism diagram of the operation position (neutral) of the auxiliary shift switching operation member.

Fig. 15 is a transmission mechanism diagram of the operation position (stop planting) of the auxiliary shift switching operation member.

Fig. 16 is a flow chart showing a control device of another configuration example.

Fig. 17 is a flow chart showing a control device of another configuration example.

Fig. 18 is a flow chart showing a control device of another configuration example.

Fig. 19 is a flow chart showing a control device of another configuration example.

Fig. 20 is a flow chart showing the function of stopping the planting of the control device of the passenger-type rice transplanter.

Fig. 21 is a flow chart for stopping the planting process 0.

Fig. 22 is a flow chart for stopping the planting process 1.

Fig. 23 is a flow chart for stopping the planting process 2.

Fig. 24 is a flow chart for stopping the planting process 3.

Fig. 25 is a flow chart for stopping the planting process 4.

Figure 26 is a flow chart summarizing Figures 21 through 25.

Figure 27 is a flow chart summarizing Figures 21 through 25.

Figure 28 is a hydraulic circuit diagram of the stepless transmission of the passenger type rice transplanter.

Figure 29 is a side cross-sectional view of the stepless shifting device.

Figure 30 is a top cross-sectional view of the stepless shifting device.

Figure 31 is an enlarged view of the piston portion of the stepless shifting device.

Figure 32 is a view showing a piston portion of a stepless transmission of another configuration example.

Embodiments of the present invention will be described below.

In the seedling transplanting machine of the present embodiment, the left side view and the plan view of the eight-row type of passenger-type rice transplanter are shown in FIG. 1 and FIG. In addition, in this specification, the direction of the rice transplanter 1 will be adjusted to the left and right. It is defined as left and right, and is defined as front and back respectively.

The rice transplanter 1 is configured such that the seedling planting portion 4 is attached to the rear side of the traveling vehicle body 2 via the lifting and lowering link mechanism 3, and the main body portion of the fertilizer applying device 5 is provided on the upper side of the rear portion of the traveling vehicle body 2. The traveling vehicle body 2 includes a four-wheel drive vehicle that is a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at a front portion of the body, and the transmission case 12 is disposed in the transmission body 12 Front and rear end casings 13 are provided on the left and right sides, and a pair of right and left front wheels 10, 10 are attached to the left and right front wheel axles projecting outward from the front wheel support portion of the right and left front wheel end casings 13, respectively.

Further, the traveling vehicle body 2 includes a base frame 100 having a main frame 15 fixed to the rear surface portion of the transmission case 12 at the front end portion, and is disposed in the left-right direction of the traveling vehicle body 2 constituting the rear portion of the main frame 15. The upper and lower pair of link base frames 42L and 42R are raised upward from both end sides of the base frame 100, and are connected to the front end side of the lift link mechanism 3.

Further, on the left and right sides of the rear portion of the traveling vehicle body 2, a rear wheel gear case 200L and a right rear wheel gear case 200R that accommodate the left side of the transmission mechanism that transmits the driving force from the engine 20 to the left and right pair of rear wheels 11 and 11 are disposed.

The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission 21 and the stepless transmission 23 as the main transmission. Then, the rotation transmitted to the transmission case 12 The force is taken out by the auxiliary transmission 571 (FIG. 10) in the transmission case 12, and is taken out as the traveling power and the external extraction power. The sub-transmission device 571 changes the output of the traveling power from the engine 20 toward the front wheels 10, 10 and the rear wheels 11, 11.

And, a part of the traveling power is transmitted to the front wheel end casing 13 to drive the pair of left and right front wheels 10, 10, and the remaining part is transmitted to the left rear wheel gear case 200L via the first transmission shaft 230L, respectively, and via the second The transmission shaft 230R is transmitted to the right rear wheel gear case 200R to drive the pair of left and right rear wheels 11, 11.

Further, a part of the traveling power transmitted to the rear wheel gear case 200L on the left side is grounded to the seedling planting portion 4 via the grounding clutch mechanism 320 (FIGS. 6 and 7) provided in the rear wheel gear case 200L on the left side. The rotor 27 (sometimes referred to simply as a combination of the first ground rotor 27a and the second ground rotor 27b) is driven. The soil preparation clutch mechanism 320 will be described later using FIG. 7 and the like.

Further, a part of the traveling power transmitted to the right rear wheel gear case 200R is transmitted to the fertilizer application device 5 via the fertilizer application transmission mechanism 420 (FIGS. 6 and 8) provided in the right rear wheel gear case 200R. The fertilization transmission mechanism 420 will be described later using FIG. 8 and the like.

Then, the external power take-off is transmitted to the rear of the traveling body 2 The portion of the clutch housing 25 is planted, and then the seeding planting portion 4 is driven by the planting drive shaft 26.

The upper portion of the engine 20 is covered by a hood 30 on which an operating seat 31 is disposed. A front cover 32 having various operation mechanisms built therein is provided in front of the operator's seat 31, and a rotary operation member 34 for steering the left and right front wheels 10, 10 is provided above the front cover 32.

Further, in the vicinity of the operator's seat 31, a main shift switching operation member 16 for switching the output of the stepless speed change device 23 is provided, and by performing a turning operation in the front-rear direction along the guide rod 16a (Fig. 4), the tilting can be performed. The trunnion 295 (Fig. 30) of the inclined angle of the plate 69 (Fig. 29) is rotated, and the swash plate 69 adjusts the hydraulic pressure output from the stepless transmission 23, whereby the output of the stepless transmission 23 can be changed to travel. The structure of the vehicle body 2 is advanced (restarted), stopped (neutral), and increased and decelerated.

The operation position of the main shift switching operation member 16 is detected by the main shift operation amount detecting member 16b provided at the base of the main shift switching operation member 16. The operation amount by which the main shift operation amount detecting member 16b (FIG. 5) detects that the operation amount from the neutral position 16aa (FIG. 4) coincides with the operation direction is controlled by the control device 163 and by the trunnion electric motor 103 shown in FIG. The trunnion 295 of the stepless speed change device 23 is rotated. The angle of rotation of the swash plate 69 can be changed by the rotation angle of the trunnion 295, so that the output of the stepless transmission 23 can be changed without a step. Further, the trunnion electric motor 103 is actuated to rotate forward to the forward side and reverse to the reverse side.

Further, by rotating the sub-shift switching operation member 17 (FIG. 2) along the guide rod 17a (FIG. 4), the sub-transmission device 571 is manually switched to the position of the road speed (high speed) for movement, The position of the planting work speed (low speed) for the work and the neutral position of the travel system drive. The operation position of the sub-shift switching operation member 17 is detected by the sub-shift operation position detecting member 17b (FIG. 5) provided at the base of the sub-shift switching operation member 17.

The left and right sides of the lower end of the hood 30 and the front cover 32 are horizontal bottom pedals 35. The bottom pedal 35 has a partial lattice shape (refer to FIG. 2), and is a structure in which the soil on the shoes of the operator of the bottom pedal 35 falls on the farmland.

The lifting link mechanism 3 is a parallel link structure and includes one upper link 40 and a pair of left and right lower links 41. The base portions of the upper link 40 and the lower link 41 are rotatably attached to the base frame 100 that is erected on the rear end portion of the main frame 15, and the pair of left and right link base frames that are regarded as a door frame from the back side are formed. In the 42L and 42R, the vertical link 43 is connected to the front end side. Then, the connecting shaft 44 that is rotatably supported by the seedling planting portion 4 is inserted and coupled to the lower end portion of the vertical link 43, and the seedling planting portion 4 is rotatably connected around the connecting shaft 44.

The support member fixed on the main frame 15 is integrally formed on the upper link A lift cylinder 46 is provided between the front end portions of the swing arm (not shown) of the rod 40, and the lift cylinder 46 is hydraulically expanded and contracted, whereby the upper link 40 is rotated up and down, and the seedling planting portion 4 is substantially Lift and hold in a state of maintaining a fixed posture.

The seedling planting part 4 is a structure which is planted in eight rows, and has a seeding transmission box 50 which also serves as a frame, and a seedling stage (seedling placing part) 51 which mounts a mat seedling and reciprocates left and right to move the seedlings. One plant is supplied to each of the seedlings taking out outlets 51a, and when a plurality of rows of seedlings are supplied to the seedling taking outlets 51a, the seedlings are transported to the lower side by the seedling conveyor belt 51b; and the planting device 52 is used for seedlings The planting tool 52a plantes the seedlings supplied to the seedling take-out outlet 51a to the farmland or the like.

A floating body 55 is provided at the center of the lower portion of the seedling planting portion 4, and an intermediate floating body 57 and a side floating body 56 are provided on the left and right sides thereof, respectively. When the floating body 55, the intermediate floating body 57, and the side floating body 56 are brought into contact with the soil surface of the farmland, the body is advanced, and the floating body 55, the intermediate floating body 57, and the side floating body 56 are slid while the soil surface is flattened. The seedlings are planted on the flat track by the planting device 52.

The floating body 55, the intermediate floating body 57, and the side floating body 56 correspond to the unevenness of the top surface of the farmland, and the front end side is attached to be rotatable in the vertical direction. When the planting operation is performed, the vertical movement of the front portion of the floating body 55 is set by The angle detecting member 162 at the upper portion of the front side of the floating body 55 detects As a result of the detection, the electromagnetic hydraulic valve 161 (FIG. 5) that controls the lift cylinder 46 is switched to raise and lower the seedling planting portion 4, whereby the planting depth of the seedling is always maintained constant.

The fertilizer application device 5 has a structure in which the granular fertilizer stored in the fertilizer tank 60 is sent out by a delivery unit 61, and the fertilizer is guided to the floating body 55 and the intermediate floating body 57 by the fertilizer application hose 62. And the fertilizer guides (not shown) on the left and right sides of the side floating body 56 are placed in the vicinity of the side formed in the seedling row by the furrow opener 64 provided on the front side of the fertilizer guide Within the fertilization ditch. The air generated by the air blower 58 driven by the electric motor 53 by a blower is blown into the fertilizing hose 62 via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizing hose 62 is applied by the wind pressure. Carry out the transfer.

Further, the seedling loading table 51 is configured to slide in the left-right direction, and a pair of spare seedling frames 38 and 38 on which the seedlings for replenishment are placed are provided on the left and right sides of the front portion of the traveling vehicle body 2.

Fig. 3 is a perspective view showing a steering structure of the left and right front wheels 10, 10 of the passenger type rice transplanter shown in Fig. 1. A configuration of a portion that performs a steering operation on the left and right front wheels 10, 10 by the rotational operation member 34 will be described.

The rotational operation member 34 is fixed to an upper portion of the steering shaft provided in the front cover 32, and the rotation of the steering shaft is changed via steering provided in the transmission case 12. The speed gear is decelerated and transmitted to the output shaft 174. Next, the lower end of the output shaft 174 protrudes from the bottom surface of the transmission case 12 and is fixed with a pit arm 175. The front left and right sides of the steering arm 175 and the left and right front wheel end casings 13 and 13 are coupled by left and right levers 176 and 176 (FIG. 1).

Therefore, when the rotational operation member 34 is rotated, the steering shaft, the steering gear, the output shaft 174, the steering arm 175, the left and right levers 176, 176, and the left and right front wheel end casings 13, 13 are transmitted, so that the left and right front wheels 10, 10 to the right and left steering operation.

On the other hand, on the upper surface of the rear portion of the steering arm 175, the actuating roller 177 is rotatably provided, and the right and left sides of the actuating roller 177 are surrounded, and the slit portion 178 having the U-shaped cut shape is viewed in plan view. The movable body 179 is rotatably supported on the bottom surface of the transmission case 12.

Next, the left and right clutch operating arms 86 and 86 that operate the left and right clutches 87 and 87 of the side clutch shafts 586 and 586 (FIG. 10) of the right and left rear wheels 11 are coupled to the left and right side portions of the driven body 179. The front portions of the left and right rods 180, 180 are connected. Further, the left and right side clutches 87, 87 are often in an ON state.

Therefore, when the rotational operation member 34 is rotated to the right by a predetermined amount (having a rotation of the body to the right, the amount of rotation of the operator to the right, for example, 200 degrees), the steering arm 175 is also rotated to the right, and the actuation roller 177 is moved toward the right. (I) side To rotate, in order to press the left side surface 178a of the cutout portion 178 of the driven body 179, the driven body 179 is rotated in the (II) direction and the right lever 180 is pulled, the right clutch operating arm 86 is operated, and the right clutch 87 is opened.

These rotational operation members 34, the output shaft 174, the steering arm 175, the actuating roller 177, the driven body 179, the lever 180, the side clutch operating arm 86 for clutch engagement, and the like are referred to as a steering mechanism S. Since the right rear wheel 11 on the center of the rotation center is in an idling state, the right rear wheel 11 does not damage the plough pan, and does not enclose the soil in a large amount, resulting in rough soil surface and smooth operation. Rotate right.

On the other hand, when the rotational operation member 34 is rotated to the left by a predetermined amount or more, the steering arm 175 is also rotated to the left, and the actuation roller 177 is rotated in the opposite direction to (I), in order to press the right side of the cutout portion 178 of the follower body 179. 178b, the driven body 179 is rotated in the opposite direction to (II), and the left lever 180 is pulled, the left clutch operating arm 86 is operated, the left clutch 87 is opened, and the left rear wheel 11 on the rotation center side is idling. Therefore, the left rear wheel 11 can be prevented from damaging the plow bottom layer, and the soil is not largely exposed to cause the soil surface to be rough, and the left rotation can be smoothly performed.

As described above, when rotating, the side clutch 87 that rotates outside maintains the ON state, but only the side clutch 87 that is rotating inside can be turned off.

4(a) shows an example of a top view of the display panel 80, FIG. (b) shows an example of a plan view of the operation panel 70. 5 is a block diagram showing the control device 163 of the rice transplanter 1 of FIG. 1.

Next, in the rice transplanter 1 of the present embodiment, an operation panel 70 is disposed in the vicinity of the rotational operation member 34 at the upper portion of the front cover 32, and the operation panel 70 is provided with various switches, buttons, dials, and the like, and The operation panel 70 is provided with a display panel 80 that displays job information such as an operation operation position, a work, an operation control state, and the like of the rice transplanter 1.

As shown in FIG. 4, the main shift switching operation member 16 is disposed on the right side, the auxiliary shift switching operation member 17 is disposed on the left side, and the ridge clutch is disposed on the lower side. As shown in the figure, the switch clutch 82 is turned on/off. The field clutch switch 82 is provided with one row and two rows of the field clutch switch 82a, three rows and four rows of the field clutch switch 82b on the left side, and five rows and six columns of the field clutch switches 82c and 7 and 8 on the right side. Column of the 埂 clutch switch 82d.

Further, a rotary interlocking switch 90 is provided on the right side of the guide 17a of the auxiliary shift switching operation member 17, and the rotary interlocking switch 90 automatically performs the operation and elevation of the seedling planting portion 4 and the rotation of the fertilizing device 5 in accordance with the rotation. The interlocking mode is turned on/off, and a planting start adjustment dial 92, a height adjusting dial 94 of the ground preparation rotor, and the like are disposed on the upper side of the rotary interlocking switch 90.

Further, the "planting" on the upper side of the monitor 83 of the display panel 80 is turned on when the planting operation on/off member 25a in the planting clutch case 25 is turned on, and the rotation interlocking lamp 84 is in the case where the rotation interlocking mode is turned on. Light up. The on/off state of the planting operation opening/closing member 25a is detected by the planting action detecting member 25ab. Further, the rotation interlocking lamp 84 is shown as "turn" as an example. Further, a lamp or the like that is turned on when the load of the fertilizer application device is blocked or the fertilizer is supplied is completed when the load of the field is disconnected.

When the interlocking switch 90 is rotated to be in the rotational interlock mode, the rotary interlocking mechanism T functions. Specifically, when the rotational operation member 34 is operated to start the rotational travel, the control device 163 switches the electromagnetic hydraulic valve 161 to contract the lift cylinder 46 to raise the seed planting portion 4. Then, the counting of the difference in the number of revolutions of the left and right rear wheel rotation sensors 205, 205 provided to the rear wheel shaft 341 is started, and the rotation operation member 34 is operated to the rotation end side to the left and right rear wheel rotation sensors 205, When the difference in the number of revolutions of 205 is less than a fixed value, the electromagnetic hydraulic valve 161 is switched by the control device 163 to extend the lift cylinder 46 to lower the seedling planting portion 4, and if the left and right rear wheels rotate the sensors 205, 205 When the number of revolutions reaches a predetermined number of revolutions, the planting operation on/off member 25a is turned on. This will be described in further detail below.

First, the operator rotates the rotational operation member 34 by 200 degrees toward either the left and the right (the rotational operation member 34 rotates 360 degrees to 400 degrees to the left and right). When the degree is started, the rotation starts. The control device 163 calculates the rotation start timing based on the detection result of the rotation direction detecting member 193 of the rotational operation member 34. Further, the rotation direction detecting member 193 can detect not only the steering angle of the rotational operation member 34 but also the rotation direction. Further, the rotation direction detecting member 193 is a potentiometer provided on the steering shaft of the rotational operation member 34.

Then, when the start of the rotational travel, the control device 163 outputs a signal to control an electromagnetic solenoid (not shown) that activates the electromagnetic hydraulic valve 161, and raises the seed planting portion 4 to move the planting clutch motor 24 toward the opening side. The planting operation on/off member 25a is turned off. Further, by the steering mechanism S, the side clutch 87 on the inner side of the rotation of the left and right side clutches 87, 87 (FIG. 10) built in the transmission case 12 is disconnected.

Next, the counting of the difference in the number of revolutions of the left and right rear wheel rotation sensors 205, 205 is started, and the side wheel clutch 87 that rotates the inner side after the rotation operation member 34 is operated to the rotation end side is turned on and the left and right rear wheel rotation sensor When the difference in the number of revolutions of 205 and 205 is less than a fixed value, the control device 163 controls the electromagnetic solenoid that operates the electromagnetic hydraulic valve 161 and lowers the seed planting portion 4, and the rotation of the left and right rear wheel rotation sensors 205, 205 When the number reaches the predetermined number of revolutions, the planting clutch motor 24 is turned on to cause the planting operation opening/closing member 25a to be turned on.

When the planting operation opening/closing member 25a is turned on, the seedling seeding tools 52a of all the planting rows are actuated, and the seedling loading table 51 is also started. Moving to the left and right, the seedling conveyor belt 51b of all the planting rows is actuated at the left and right moving ends of the seedling loading table 51. As the transmission mechanism, the planting operation opening/closing member 25a is driven by the planting drive shaft 26 toward the seedling planting portion 4, and is driven in the seedling planting portion 4 via the respective field clutches to the corresponding seedling planting tool 52a. The respective parts 4 are respectively driven to the corresponding seedling conveyance belts 51b via the respective seedling conveyance clutches (not shown). As described above, the seedling cultivation is automatically started even if the operation of the seedling planting rod 19 (Fig. 2) is not performed.

Further, the fertilizer application device 5 is also operated in conjunction with the elevation of the seedling planting portion 4, and the structure thereof will be described later.

Next, the transmission structure of the left rear wheel gear case 200L that drives the driving force from the transmission body 12 side will be described with reference to Figs. 6 and 7 . 6 is a schematic plan view showing a transmission structure of the transmission case 12, the left rear wheel gear case 200L, and the right rear wheel gear case 200R, and FIG. 7 is an enlarged view of the left rear wheel gear case 200L of FIG. Further, in FIGS. 6 and 7, the front side, the rear side, the left side, and the right side of the traveling vehicle body 2 are displayed by arrows F, B, L, and R, respectively. The same applies to Fig. 8 which will be described later.

As shown in FIGS. 6 and 7, the grounding clutch mechanism 320 including the first input shaft 321L transmits power from the transmission body 12 side to the first input shaft 321L via the first transmission shaft 230L. The power is configured such that a first bevel gear 321aL from the rear end side of the first input shaft 321L passes through the second rotating shaft 340L to which the second bevel gear 330L is fixed. The small-diameter gear 331L fixed to the second rotating shaft 340L is transmitted to the large-diameter gear 332L, whereby the left rear wheel axle 341L is rotated.

Next, a configuration in which the driving force of the grounding clutch mechanism 320 to the rotor drive shaft 301 is turned on/off will be described.

The grounding clutch mechanism 320 is provided at the front end with a first input shaft 321L, a grounding rotor on/off clutch 322, and a spline connection slidably coupled to the first input shaft 321L; a biasing spring 323, often The grounding rotor on/off clutch 322 is biased toward the first bevel gear 321aL side; and the protrusion 324aL, against the spring pressure of the biasing spring 323, presses the grounding rotor on/off clutch 322 of the jaw 322a; As shown in FIG. 7, the shifting gear 324L is provided to shift the ground rotor on/off clutch 322 in the direction of the arrow E along the axial direction of the first input shaft 321L; and the first gear 325, and the first input The shaft 321L is loosely fitted and disposed on the side of the first bevel gear 321aL of the grounding rotor on/off clutch 322.

Next, a plurality of first clutch pawls 322b are formed on the surface of the grounding rotor on/off clutch 322 on the side of the first gear 325, on the surface of the first gear 325 on which the ground rotor is turned on/off the clutch 322 side. A plurality of second clutch pawls 325a are formed to be fitted to the first clutch pawls 322b. Then, the transmission force generated by the rotation of the first gear 325 is transmitted via the chain 311 toward the second gear 312 fixed to the rotor drive shaft 301. borrow Thereby, the driving force is transmitted toward the ground rotor 27 side.

Further, the side of the root portion 324b of the shifting displacement 324L is connected to a switching interlocking mechanism 326a including a rod, a wire, a spring, or the like provided on the traveling vehicle body 2 side of the lifting link mechanism 3. When the body is rotated, when it is retracted, or when the seedling planting portion 4 is raised by the operator's operation, when the lifting and lowering link mechanism 3 is moved upward to a predetermined height, the switching and interlocking mechanism 326a operates the switching displacement device 324L. The ground handling clutch mechanism 320 is in an open state. Thereby, when the seedling planting part 4 rises, the drive of the ground preparation rotor 27 can be stopped.

Further, as described above, if the rotor drive shaft 301 that transmits the driving force toward the ground rotor 27 side is disposed inside the machine body, the rotor drive shaft 301 is located further inside the body than the left rear wheel gear case 200L, and is disposed away from the body. The position of the rear wheel 11 on the left side of the left side of the left rear wheel gear case 200L is located, so that the soil bounced by the rotation of the rear wheel 11 is splashed on the left rear wheel gear case 200L, and it is difficult to drive toward the rotor. The shaft 301 is scattered so that the oil seal of the rotor drive shaft 301 can be prevented from being damaged.

The lubricating oil for the internal gear mechanism is sealed in the left rear wheel gear case 200L, and an oil seal is provided at a portion where the rotor drive shaft 301 protrudes. If the oil seal is broken, the lubricating oil accompanying the rotation of the rotor shaft 301 may leak outward, but according to the above configuration, the lubricating oil becomes difficult to leak.

Further, the rotor drive shaft 301 may be disposed below the left rear wheel gear case 200L. Thereby, the height of the ground rotor 27 below the left rear wheel gear case 200L is approached, and the transmission loss of the driving force can be prevented.

Alternatively, the rotor drive shaft 301 may be disposed above the left rear wheel gear case 200L. Thereby, it is difficult for the soil to scatter toward the rotor drive shaft 301, so that the oil seal can be prevented from being damaged by the influence of the soil, thereby improving the durability of the rotor drive shaft 301.

Next, a transmission structure of the right rear wheel gear case 200R that transmits the driving force from the transmission body 12 side will be described with reference to FIGS. 6 and 8. FIG. 8 is a schematic plan view showing a transmission structure of the driving force inside the right rear wheel gear case 200R.

As shown in FIG. 6, in the fertilizer applying mechanism 420, power is transmitted from the transmission body 12 side to the second input shaft 321R via the second transmission shaft 230R. The power is configured to be driven from the first bevel gear 321aR on the rear end side of the second input shaft 321R toward the second rotating shaft 340R to which the second bevel gear 330R is fixed, via the second rotating shaft 340R. The upper small diameter gear 331R is transmitted to the large diameter gear 332R, whereby the right rear wheel shaft 341R is rotated.

Next, a configuration in which the driving force of the fertilization transmission member 420 is turned on/off by the fertilization transmission member 401 will be described.

The fertilization transmission mechanism 420 is provided at the front end with a second input shaft 321R, a fertilization transmission ON/OFF member 422, and a splined connection with the second input shaft 321R; a fertilization application spring 423 to connect the fertilization drive The breaking member 422 continues to urge toward the side opposite to the first tapered gear 321aR side; and the protruding portion 324aR presses the fertilizing dam portion 422a of the fertilizing transmission ON/OFF member 422 against the elastic pressure of the fertilizing biasing spring 423 As shown in FIG. 8, the shifting device 324R is configured to shift the fertilization transmission on/off member 422 in the direction of the arrow E along the axial direction of the second input shaft 321R; and the third bevel gear 425, The second input shaft 321R is fitted with a gap and is disposed on the opposite side of the first tapered gear 321aR side of the fertilization transmission ON/OFF member 422.

Next, a plurality of third clutch claws 422b are formed on the surface of the third bevel gear 425 side of the fertilizer transmission opening/closing member 422, and the fertilization transmission ON/OFF member 422 of the third bevel gear 425 is formed. The side surface is formed with a plurality of fourth clutch pawls 425a for fitting with the third clutch pawls 422b.

Next, the root portion 324bR of the switching displacer 324R is coupled to the fertilization transmission actuator 426a that switches the driving force of the fertilizing device 5 via the cable 427, and is interlocked with the lifting of the seedling planting portion 4, and utilizes the fertilizing transmission actuator 426a. The structure of the fertilization transmission on/off member 422 is switched.

The utility model is configured to: plant the clutch motor 24 and the seedling by the control device 163 The lifting and lowering of the planting unit 4 is performed in unison, and the fertilizing transmission actuator 426a is actuated in accordance with the operation of the planting clutch motor 24. However, when the seedling planting part 4 is lowered (at the time of planting operation), as shown in FIG. 5, the fertilizing transmission actuator 426a is turned on/off by the fertilizing transmission switch 428, and the seedling is planted independently and Fertilization.

When the shifting actuator 426 is switched to operate to one side, that is, the right side of FIG. 8, by the fertilizing transmission actuator 426a, the fertilizing transmission on/off member 422 is switched to the same direction, that is, the right side of FIG. Thus, the engagement of the third clutch pawl 422b with the fourth clutch pawl 425a is released, so that the driving force generated by the rotation of the input shaft 321 is not transmitted to the third bevel gear 425. Therefore, the driving force is not transmitted to the side of the fertilizer application device 5.

On the other hand, as shown in FIG. 8, when the switching actuator 426 is switched to the other side, that is, the left side of FIG. 8, by the fertilizer applying actuator 426a, the fertilizing transmission ON/OFF member 422 is switched to In the same direction, that is, on the left side of FIG. 8, the third clutch pawl 422b is fitted to the fourth clutch pawl 425a, and thus the driving force generated by the rotation of the input shaft 321 is transmitted toward the third bevel gear 425. Then, the transmission force generated by the rotation of the third bevel gear 425 is transmitted toward the fourth bevel gear 412 fixed to the fertilizer transmission member 401. Thereby, the driving force is transmitted toward the side of the fertilizer application device 5.

In addition, the arrangement of the right rear wheel gear box 200R and the left rear wheel gear box 200L can also be exchanged left and right, or the rear wheel gear box on the right side. The 200R sets the grounding clutch mechanism 320, and the left side rear wheel gear box 200L is provided with a fertilizer applying mechanism 420.

Next, in the rice transplanter 1, when the rotation detecting mechanism T functions as a rotation, if the angle detecting member 162 detects that the entire front and rear regions of the floating body 55 are in contact with the farm surface, the fertilizer application device is utilized. The fertilization transmission actuator 426a of 5 switches the fertilization transmission on/off member 422 to the on state and drives the fertilizer application device 5. Further, when the fertilization transmission ON/OFF member 422 is in the ON state, the air blower electric motor 53 is also actuated at the same time, thereby generating fertilizer conveying air, thereby improving the efficiency of fertilizer transportation.

Next, when the angle detecting member 162 detects that the floating body 55 is away from the farm surface, that is, when the contact ground is not detected, the fertilizer transmission opening/closing member 422 is in the off state by the fertilizer driving actuator 426a, and the blower is used. The electric motor 53 is actuated in conjunction with each other and does not drive the fertilizer application device 5. Figure 9 shows the flow chart at this time.

When the angle detecting member 162 detects that the floating body 55 is in contact with the farmland surface, it determines the on/off state of the fertilization drive at the time point, and maintains the state when the fertilizer application device 5 is actuated, and on the other hand, When the fertilizer application device 5 is not actuated, the drive is switched to actuate the fertilizer drive actuator 426a.

Also, the floating body 55 and the farmland are not detected by the angle detecting member 162 When the surface contact is detected, that is, when the departure is detected, the on/off state of the fertilization drive at the time is judged, and the drive is switched to stop when the fertilizer application device 5 is actuated. On the other hand, when the fertilizer application device 5 is not actuated, this state is maintained. The on/off state of the fertilization drive is a sensor that detects the on/off state of the fertilization transmission ON/OFF member 422 on the fertilization transmission ON/OFF member 422 (omitted from the figure) It is shown or indicated by the on/off state of the fertilization drive switch 428.

The angle detecting member 162 detects the angle at which the floating body 55 is separated from the farmland surface. For example, when the entire front and rear regions of the floating body 55 are in contact with the farmland surface, it is set to ±0 degrees (reference value), and is -3 degrees to 5 degrees. More than the degree. Further, since the vertical fulcrum of the floating body 55 is at the rear of the floating body, the angle is considered to be negative if the front end of the floating body 55 is lowered from the reference value, and is positive if it is raised.

When the angle detecting member 162 detects that the floating body 55 is separated from the farmland surface, the fertilizer application device 5 is stopped, whereby the seedling planting portion 4 starts to rise, and the supply of the fertilizer from the fertilizer application device 5 is stopped, thereby preventing the position away from the farmland surface. Release the fertilizer to prevent the spread of excess fertilizer.

Further, when the angle detecting member 162 detects that the floating body 55 is in the grounded state, the fertilizer application device 5 is actuated, and the fertilizer application device 5 can be activated to start the fertilizer before the rotation of the seedlings after the rotation starts. Conveying, so the fertilizer is supplied to the farmland at the beginning of the rotation of the seedlings after the rotation material. Therefore, the generation of the section in which the fertilizer is not supplied can be prevented. Further, since the fertilizer is supplied while the floating body 55 is in contact with the ground, it is not spread in the air.

In addition, when the operation of the fertilizer application device 5 when the seedling planting portion 4 is raised is stopped, the configuration may be such that the angle detecting member 162 is not turned on by detecting the planting operation on/off member 25a. When the disconnected planting operation on/off member 25ab detects the disconnection state of the planting operation on/off member 25a, the fertilizer application actuator 426a is turned off, and the operation of the fertilizer application device 5 is stopped.

After the planting device 52 after the planting actuating on/off member 25a is turned off, the fertilizing device 5 is stopped, and the fertilizing hose 62 of the fertilizing device 5 can be moved toward the maximum position during the raising of the seedling planting portion 4 The fertilizer in the movement of the farmland surface is supplied to the farmland, thereby preventing the supply of fertilizer more than necessary at the start of the supply of the fertilizer after the rotation, and preventing the supply of excess fertilizer.

When the seedling-growing unit 4 is lowered, as described above, when the angle detecting member 162 detects that the floating body 55 is in the grounded state, the fertilizer application device 5 is operated to prevent the occurrence of the section in which the fertilizer is not supplied, and the fertilizer is Spread in the air and spread.

These controls are performed by the control device 163. As shown in FIG. 4, the operator is provided by the selection switch 432 provided on the operation panel 70. The result of the detection by the angle detecting member 162 or the result of the detection by the planting operation on/off member 25ab, and the operation of the fertilizer application device 5 when the seedling planting portion 4 is raised can be selected according to the working conditions, the farmland conditions, and the like. . When the selection switch 432 is operated to the left side, based on the result detected by the angle detecting member 162, if it is operated to the right side, the result of the detection by the planting operation ON/OFF member 25ab is performed.

Next, as described above, the fertilization transmission mechanism 420 and the fertilization transmission member 401 are disposed on the left and right rear wheel gear cases 200 (the right rear wheel gear case 200R in the illustrated example), and are configured to pass through the planting clutch housing 25 And an independent fertilization transmission mechanism for planting the transmission mechanism of the transmission shaft 26 to the seedling planting portion 4.

That is, since the ON/OFF of the driving of the fertilizer application device 5 can be independently performed, the start and end of the fertilizer supply can be operated regardless of the ON/OFF of the planting device 52, thereby preventing the supply of excess fertilizer and the generation of excess fertilizer. The interval where no fertilizer is supplied.

In addition, a fertilization transmission switch 428 that performs an on/off operation on the fertilization transmission mechanism 420 is disposed on the operation panel 70, and the operator can press the fertilization transmission switch 428 to apply the fertilizer application to the fertilization transmission actuator 426a. 5 action.

Then, according to the on/off operation of the fertilization transmission switch 428, the angle The fertilization transmission actuator 426a is actuated by the detection result of the detection member 162, the detection result of the planting actuation on/off member 25ab, and the like, and the fertilization transmission mechanism 420 is turned on/off (fertilization transmission function), whereby the fertilization transmission mechanism is applied. The ON/OFF of the 420 is easily automated, so work efficiency can be improved, and the on/off of the fertilizer application device 5 can be surely performed.

Next, as shown in FIG. 6, the fertilization transmission member 401 which transmits a driving force to the side of the fertilizing apparatus 5 is arrange|positioned on the inner side of a machine body, and it is arrange|positioned on the side opposite side of the side of the rear-wheel-wheels- Thereby, the soil bounced by the rotation of the rear wheel 11 is splashed on the outer side surface of the right rear wheel gear case 200R, so that the soil can be prevented from adhering to the fertilizer applying member 401.

On the other hand, the fertilization transmission member 401 is disposed on the outer side of the body, that is, the fertilization transmission member 401 is disposed on the rear wheel 11 side (right side) with respect to the right rear wheel gear case 200R, whereby the operator easily accesses the rear wheel 11 The side, that is, the outside of the body, performs maintenance of the fertilization transmission member 401 and its members, thereby improving the workability of maintenance.

Moreover, since the fertilization transmission member 401 is disposed above the right rear wheel gear case 200R, the distance between the fertilizer application device 5 and the delivery portion 61 disposed on the traveling vehicle body 2 can be shortened, so that the transmission loss of the driving force can be suppressed.

Also, the fertilizer delivery actuator 426a is disposed in the right rear wheel gearbox When the upper portion of the 200R is below the bottom pedal 35, the soil bounced by the rotation of the rear wheel 11 hardly reaches the fertilization transmission member 401, and the soil can be prevented from adhering to the fertilizer application member 401.

Further, a rod (not shown) may be attached to the lower link 41 of the lift link mechanism 3, and the rod may be connected to the root portion 324bR of the shift stopper 324R via the cable 427 to have a fertilization drive ON/OFF. The function of the on/off operation of the member 422.

Next, it is also possible to adopt a configuration in which a manual operation member 426 is attached to the fertilization transmission member 401 to manually feed the fertilizer. 8 is a view showing a structure in which the fertilization transmission member 401 protrudes toward the inner side (ie, the left side) of the rear wheel gear case 200R of the right side, but if the fertilization transmission member 401 is directed to the outside of the body of the right rear wheel gear case 200R (ie, the right side) When the manual operation member 426 is attached to the protruding portion, the fertilizer supply of the fertilizer application device 5 can be manually operated.

The operator changes the fertilizer supplied to the fertilizer application device against the components of the farmland and the cultivated crops, and the fertilizer has a different specific gravity depending on the components. In this way, even if the setting of the amount of the fertilizer to be supplied to the fertilizer application device 5 is the same, there is a case where the amount of the fertilizer actually supplied is larger or smaller than the setting, and there is a case where the supply amount of the fertilizer supplied to the farmland is increased or decreased. . In order to prevent this, the fertilizing device 5 is actuated before the planting operation of the seedlings in the field, and the amount of the fertilizer released from the fertilizing device 5 within a predetermined time is confirmed. In the test delivery, the amount of fertilizer supplied is set in advance to an amount suitable for the working conditions.

On the other hand, the fertilizing device 5 is a structure that does not drive if the seedling planting portion 4 is not driven. Therefore, when performing the "experimental feeding" operation, it is necessary to carry out the seedlings before the seedling planting portion 4 or temporarily It is removed from the seedling planting part 4, and there is a problem that extra work time is spent. Further, when the seedlings are placed on the seedling planting part 4, the seedlings are scraped off at the time of experimental delivery, and there is a problem that the seedlings are excessively consumed. Then, since it is necessary to operate the engine, there is a problem that excessive fuel is consumed and the fuel cost rises.

However, as described above, when one end portion of the fertilizing transmission member 401 is protruded to the right side from the right rear wheel gear case 200R, and the manual operation member 426 is attached to the protruding portion, the fertilizing device 5 can be manually operated. "Experimental delivery" assignment.

Therefore, the operator performs the "experimental delivery" operation by the manual operation of the manual operation member 426, whereby the excessive fuel consumption of the traveling vehicle body 2 can be suppressed, and the fuel consumption can be reduced.

Further, since the manual operation member 426 is attached to the vicinity of the right rear wheel gear case 200R, the supply distance to the driving force of the fertilizer application device 5 at the rear of the body can be shortened, so that the transmission loss of the driving force can be reduced, and the work efficiency can be improved. And the force to operate the manually operated member 426 can be alleviated, so It can reduce the labor of the operator.

Further, when the rear wheel 11 on the side of the rear wheel gear case 200R on the right side where the fertilization transmission member 401 is disposed is rotated in the inner side of the rotation, the rear wheel 11 on the side of the rear wheel gear case 200L on the left side where the fertilization transmission member 401 is not provided is provided. The timing of the operation of the fertilizing transmission actuator 426a after the rotation is earlier than the inner side of the rotation.

During the rotational travel, the side clutch 87 that rotates inside is disconnected by the steering mechanism S described above, and thus the transmission of the driving force to the right wheel gear case 200R located on the right side of the rotation is disconnected. Therefore, when rotating toward the right side where the fertilization transmission member 401 is provided, the number of revolutions of the fertilization transmission member 401 when the fertilization transmission ON/OFF member 422 is in the ON state is lower than when it is rotated to the left side, and thus there are the following Problem: The timing at which the fertilizer application device 5 operates is slowed, and the supply start position of the fertilizer changes due to the rotation direction, and a position where the fertilizer is not supplied is generated.

However, since the operation timing of the fertilization transmission actuator 426a after the right rotation is made earlier than the operation timing after the left rotation, the number of revolutions of the fertilization transmission can be surely ensured after the rotation, so that the supply of the fertilizer can be made regardless of the rotation direction. The start timing is stable, so that the interval in which the fertilizer is not supplied can be prevented.

In the foregoing description, since the fertilization transmission member 401 is disposed on the right rear wheel gear case 200R, the control device 163 performs the rotation toward the right side. The rotation time is controlled to make the actuation timing of the fertilizer application actuator 426a earlier (for example, 3 seconds to 5 seconds) than when it is rotated to the left side. Specifically, the ON time of the rotation pulse of the fertilization transmission member 401 after the floating body 55 is in contact with the ground when the right rotation is rotated is shorter, and the fertilization transmission actuator 426a is activated at an earlier timing. Thus, the fertilization transmission on/off member 422 is in an on state.

In the case of the right rotation, the number of output rotations of the fertilization drive to the right rear wheel gear case 200R is lowered as the right side clutch 87 is turned off. Therefore, the start point of the fertilization tends to be delayed compared to the case of the left rotation. The structure allows the driving of the fertilizer application device 5 to be fixed irrespective of the direction of rotation.

Further, when the operator causes the sub-shift switching operation member 17 to be neutral along the guide rod 17a, as shown in FIG. 4, when the sub-shift operation position detecting member 17b detects that it is operated to the neutral position N, the control device 163, the planting clutch motor 24 is actuated toward the opening side, and the planting operation opening/closing member 25a is turned off, thereby stopping the operation of the planting device 52 (stop function). On the other hand, when the sub-shift switching operation member 17 is operated to the stop planting position W beside the neutral position, the supply of the driving force to the left and right front wheels 10, 10 and the left and right rear wheels 11, 11 of the traveling body 2 can be applied. The planting device 52 is actuated in the stopped state. Call it "stop planting work."

In the stop planting position W, there is a stop planting as a sensor switch. When the sub-shift switching operation member 17 is operated, the position detecting means 430 is turned on and inputs a signal to the control device 163. Next, a signal for causing the planting clutch motor 24 to move to the ON side is output from the control device 163, and the planting operation ON/OFF member 25a is turned on, and the planting device 52 operates. Call it the stop planting function.

The auxiliary shift switching operation member 17 is configured such that a biasing member such as a torsion spring (not shown) is often biased from the stop planting position W toward the neutral position N side, and the operator moves away from the auxiliary shift switching operation member 17 Return to the neutral position N immediately. Thereby, if the operator deliberately does not operate the sub-shift switching operation member 17 to stop the planting position W, the sub-shift switching operation member 17 is not detected by the stopped planting position detecting member 430, and the planting device 52 is not actuated.

Figure 10 is a plan view showing the transmission mechanism in the transmission case 12 that is driven toward the drive wheels. The actual drive shafts are not arranged on the same plane, but for the description of the transmission mechanism, the display is arranged on the same plane. Further, in Fig. 10, the upper direction of the drawing is the right side of the vehicle body, and the downward direction is the left side of the vehicle body.

The transmission body 12 supports the rotational power from the stepless transmission 23 via the transmission input shaft 583, and the right and left front wheels 10, 10 and the left and right rear wheels 11 as the drive wheels via the auxiliary transmission 571, the differential device 585, and the like. 11, drive.

The sub-transmission device 571 has a mechanism for switching the traveling state of the traveling vehicle body 2 to "planting work speed", "road speed", and "travel neutral", and the sub-transmission switching shaft 572 that rotates at the rotational speed after shifting, The switching member 573, the planting speed transmission member 574, the road speed transmission member 575, and the relay shaft 576 are fitted to the auxiliary shift switching shaft 572. The change of the traveling state is performed by changing the ratio of the rotational speed of the relay shaft 576 and the auxiliary shift switching shaft 572. The auxiliary shift switching shaft 572 and the switching member 573 are configured to be movable in the axial direction of the auxiliary shift switching shaft 572 by spline machining, and the operator operates the auxiliary shift switching operation member 17 to operate the switching member 573. Thereby, the structure of the traveling state of the traveling vehicle body 2 is switched.

The relay shaft 576 has two gears of different diameters, one of which supports the rotational power from the transmission input shaft 583. Among the two gears, the large-diameter gear is the on-road speed transmission member 575, and meshes with the gear of the switching member 573 when the operation position of the auxiliary shift switching operation member 17 is "on-road speed". A small diameter gear often meshes with the planting speed transmission member 574. With this engagement, the relay shaft 576 transmits power to the planting speed transmission member 574 and the road speed transmission member 575.

The planting speed transmission member 574 is meshed with a gear having a small diameter of the relay shaft 576, and is disposed on the right side coaxial with the auxiliary shift switching shaft 572. The planting speed transmission member 574 and the auxiliary shifting switching shaft 572 are configured to They can be rotated relative to each other by metal bearings. Next, on the planting speed transmission member 574, the planting main drive shaft 582 that transmits the driving force to the seedling planting portion 4 is coupled in a coaxially rotatable manner. Thereby, the planting main drive shaft 582 is coaxial with the auxiliary shift switching shaft 572 and is rotatable relative to each other.

An engagement portion of the claw clutch coupled to the planting speed transmission member 574 is provided on the right side surface of the switching member 573, and a cog that meshes with the road speed transmission member 575 is formed on the outer circumference.

A portion of the rotational power from the auxiliary shifting shaft 572 is distributed by the differential 585 and transmitted to the left and right front axles 584, 584, and then toward the front wheel end housings 13, 13 by the front axles 584, 584. The front wheels 10, 10 are driven by the drive. Then, the rear wheel drive power that is taken out from the rear surface of the transmission case 12 via the left and right front wheel shafts 584 and 584 is transmitted to the rear wheel gear boxes 200L and 200R via the rear wheel drive shafts 230L and 230R, and is applied to the rear wheel 11, 11 to drive. On the transmission case 12, a brake device 581 that restricts the rotation of the front wheels 10, 10 and the rear wheels 11, 11 is provided on the left side of the auxiliary shift switching shaft 572.

Fig. 11 is a view for explaining the operation of the subtransmission mechanism in the transmission case 12 of Fig. 10; Fig. 11 (a) is a view showing the engagement when the operation position of the auxiliary shift switching operation member 17 is "on-road speed", and Fig. 11 (b) shows the engagement when the operation position of the auxiliary shift switching operation member 17 is "neutral". FIG. 11(c) shows the operation of the auxiliary shift switching operation member 17. The position at which the position becomes "planting work speed". In addition, in FIG. 11, the upward direction of the figure is the right side of the vehicle body, and the downward direction is the left side of the vehicle body.

At the "road speed", the cogging of the outer circumference of the switching member 573 meshes with the cogs of the intermediate speed transmission member 575 of the relay shaft 576. According to this configuration, the rotational power is transmitted to the switching member 573, and the auxiliary shift switching shaft 572 that is engaged with the switching member 573 by the spline is rotated together with the switching member 573, and is transmitted to the differential device 585 by the gear located on the left side of the switching member 573. Rotating power. At this time, the planting speed transmission member 574 is rotated by the relay shaft 576, but is rotated at a different rotation speed than the sub-shifting shaft 572 that is rotatable relative to each other.

At the time of "neutral", the switching member 573 does not mesh with any of the planting speed transmission member 574 and the road speed transmission member 575. The planting speed transmission member 574 is rotated by the relay shaft 576, but the auxiliary shifting shaft 572 that does not transmit the rotational power is still stopped. At this time, the planting speed transmission member 574 and the planting main transmission shaft 582 can be coupled in a coaxially rotatable manner, and only the seedling planting portion 4 can be actuated. When the sub-shift switching operation member 17 is operated to stop the planting position W, it also becomes the same mechanism.

In the "planting operation speed", the right side of the switching member 573 is meshed with the claw clutch and the left side of the planting speed transmission member 574, and is coupled to each other. The planting speed transmission member 574 is rotated by the relay shaft 576, rotated by the switching member 573 coupled by the claw clutch, and then splined with the switching member 573 The combined auxiliary shift switching shaft 572 is rotated, whereby the rotational power is transmitted from the relay shaft 576 to the auxiliary shift switching shaft 572, and the rotational power is transmitted to the differential device 585 by the gear located on the left side of the switching member 573.

Further, when the auxiliary shift switching operation member 17 is at the neutral position N, the seeding planting portion 4 is driven, but the planting actuating on/off member 25a is turned off, and the transmission to the seedling planting portion 4 is blocked. Therefore, even when the planting operation on/off member 25a is connected to the neutral position N, the seedling seeding portion 4 is in the driving state. When the sub-shift switching operation member 17 is operated to stop the planting position W, the planting operation opening/closing member 25a is turned on while the above-described "traveling neutral" state is maintained, so the planting device 52 is The rice transplanter 1 is operated in a state where it is stopped.

12 to 15 show a transmission mechanism diagram (schematic diagram) corresponding to the operation position of the sub-shift switching operation member 17.

When the operation position of the sub-shift switching operation member 17 shown in FIG. 12 is the road speed and the planting work speed shown in FIG. 13, the gear mechanism of the sub-transmission device 571 is different from only the high-speed side and the low-speed side, and other traveling systems, All the clutches of the planting system, the fertilization system, and the like are turned on. However, when the road travels, it basically becomes a non-working travel, so the seed planting portion 4 rises, the planting actuating on/off member 25a, the fertilization transmission on/off member 422, and the grounding rotor on/off clutch 322 are planted. Become disconnected.

Next, when the operation position of the auxiliary shift switching operation member 17 shown in Fig. 14 is neutral, the transmission system is not driven, so that the driving force is not transmitted to the ground preparation system or the fertilizer application system on the downstream side. Further, since the planting operation on/off member 25a is also in the off state, the traveling is stopped, and the planting device 52, the fertilizer application device 5, and the like are also in a state of no operation.

On the other hand, when the operation position of the sub-shift switching operation member 17 shown in FIG. 15 is to stop the planting, the transmission to the traveling system is turned off as in the neutral state, but the planting operation opening/closing member 25a is In the on state, the power from the engine 20 is transmitted to the planting system, so that the planting device 52 operates. Further, since it is not driven to the traveling system, the driving force is not transmitted to the fertilizing system and the leveling system branched from the right rear wheel gear case 200R.

As described above, when the sub-shift switching operation member 17 is operated to stop the planting position W, the planting operation can be performed while the traveling is stopped. Therefore, in the state where the seedling planting portion 4 is lowered on the ridge side, It is possible to plant a seedling of a certain amount, and it is excellent in workability, and it is not necessary to carry out replanting of the seedling by manual work, and the labor of the operator can be reduced.

At the start of planting of the seedlings, when the position of the first seedling planted by the planting device 52 does not coincide with the planting end position of the adjacent row, the seedlings can be planted without moving from the position, thereby improving the planting accuracy of the seedlings. Especially in agriculture In the corner of the field, when the body rotates by 90°, the position is easily confused, and the seedlings can be planted in the position where the seedlings can be planted.

Generally, it is necessary to carry out the planting when planting the seedlings, and it is necessary to quickly start the start, stop, and plant the on/off operation when the seedlings are not moved from the position thereof, which is difficult for the unskilled person, but according to the structure Anyone can simply plant seedlings.

However, if the planting operation of the seedlings is performed in a state where the floating body 55, the intermediate floating bodies 57, 57, and the side floating bodies 56, 56 are not in contact with the ground, the seedling planting tool 52a may be actuated above the farmland surface. Causes the seedlings to fall. Therefore, when the angle detecting member 162 does not detect that the floating body 55 is in the grounded state, even if the sub-shift switching operation member 17 is operated to stop the planting position W, the planting device 52 does not operate. This is called the stop plant invalid function.

According to this configuration, it is possible to prevent the seedling from falling above the farm surface due to the erroneous operation, so that the consumption of the excess seedling can be prevented.

In addition, in the rotation interlocking mode, by stopping the planting function and stopping the planting ineffective function, it is possible to prevent the planting of the seedlings in the air during the rotation on the field side, that is, to move the seedlings above the farmland surface. The wrong action of the planting device 52. Figure 16 shows the flow chart.

The auxiliary shifting switching operation is detected by stopping the planting position detecting member 430 When the member 17 is in the stop planting position W (prerequisite), the rotation interlocking switch 90 is in the rotation interlocking mode, and when the angle detecting member 162 detects that the floating body 55 is in the grounding state, the stop of the seeding function becomes effective (permission is permitted). The control device 163 outputs a signal for causing the planting clutch motor 24 to move to the ON side, and the planting operation ON/OFF member 25a is turned on to plant the seedlings.

On the other hand, when the non-rotation interlocking mode or the floating body 55 is in the separated state, the stop planting function does not function (prohibited), and the control device 163 outputs a signal for causing the planting clutch motor 24 to move to the off side, and the planting operation is performed. Since the on/off member 25a is turned off, seeding of the seedlings is not performed.

As described above, the planting operation (stopping the planting operation) in the state in which the traveling of the traveling vehicle body 2 is stopped is conditional on the grounding of the floating body 55, whereby the work efficiency can be prevented from being lowered.

Further, the stop planting function may be configured such that the brake pedal 110 shown in Fig. 1 does not operate during operation, and even if the sub-shift switching operation member 17 is operated to stop the planting position W, the planting device 52 does not operate. Figure 17 shows the flow chart.

The amount of operation of the brake pedal 110, that is, the amount of depression, is detected by the brake pedal sensor 110a provided at the base of the brake pedal 110 shown in FIG. The brake pedal sensor 110a may also be a type that contacts if it is stepped into a certain degree. Type, but can also be a stroke sensor or the like. When the brake pedal 110 is stepped on, the stop planting function does not function, and the erroneous operation when the rice transplanter 1 is stopped can be prevented and it is safe.

Further, the rice transplanter 1 drives the trunnion electric motor 103 (FIG. 5) in the forward or reverse direction by the operation of the main shift switching operation member 16 to switch the output of the stepless speed change device 23 (changing the stepless speed change device) The rotational speed of the output shaft of 23 and the rotational direction thereof, whereby the shifting configuration is such that the operating position of the main shift switching operating member 16 detected by the main shift operating amount detecting member 16b outputs a driving command to the trunnion electric motor 103 accordingly. The structure of the signal. The trunnion electric motor 103 is provided outside the stepless transmission 23, and is operated in conjunction with the operation amount of the main shift switching operation member 16 detected by the main shift operation amount detecting member 16b.

Next, the trunnion electric motor 103 rotates the trunnion arm (not shown) to a predetermined angle of rotation of the trunnion 295, and the trunnion arm rotates the trunnion 295 and directly connects to the trunnion 295. The direction of rotation of the trunnion 295 and the angle of rotation are detected by the trunnion detecting member 113 provided on the trunnion arm.

Next, it is also possible to adopt a configuration in which the operation of the main shift switching operation member 16 shown in FIG. 4 is performed even when the angle detecting member 162 detects that the floating body 55 is in the ground state when the rotary interlocking switch 90 is in the rotation interlocking mode. The position is also in the neutral position 16aa, and the trunnion 295 is also in the neutral position. When the planting function is stopped, it becomes effective. Call it the stop planting neutral function. Figure 18 shows the flow chart.

In the rotation interlocking mode in which the rotary interlocking switch 90 is turned on, the angle detecting member 162 detects that the floating body 55 is in the grounded state, and the operating position of the main shifting switching operation member 16 detected by the main shifting operation amount detecting member 16b is When the trunnion detecting member 113 detects that the trunnion 295 is in the neutral position, the stop of the seeding function becomes effective (permitted), and if the sub-shifting operation member 17 is operated to stop the planting position W, the planting operation is turned on. The disconnecting member 25a is turned on, and seedlings are planted.

On the other hand, when the operation position of the main shift switching operation member 16 detected by the main shift operation amount detecting member 16b is not the neutral position 16aa, or the rotation direction and the rotation angle of the trunnion 295 detected by the trunnion detecting member 113 When the neutral position is 16 aa, even if the sub-shift switching operation member 17 is operated to stop the planting position W, the planting function is stopped (the prohibition), and the planting-on/off member 25a is in the off state, so that the seedling is not performed. Planting.

As described above, if the traveling of the traveling vehicle body 2 is not completely stopped, the planting operation is not performed, whereby the malfunction of the planting device 52 can be prevented. For example, in the planting operation (during the work), even if the sub-shift switching operation member 17 is operated to stop the planting position W due to the erroneous operation, the sub-shift switching operation member 17 is operated to a contact with the stop planting position detecting member 430. On the side, the planting operation of the seedling does not change, so that the work efficiency due to the erroneous operation and the decrease in the planting accuracy of the seedling can be prevented.

Then, the planting of the seedlings at this time may be performed by setting the trunnion 295 to a predetermined angle and then turning on the planting operation opening/closing member 25a. Figure 19 shows the flow chart.

In other words, when the operation position of the main shift switching operation member 16 detected by the main shift operation amount detecting member 16b is the neutral position, and the trunnion 295 detected by the trunnion detecting member 113 is in the neutral position, the planting function is stopped. It is effective, and a signal for causing the planting clutch motor 24 to move to the ON side is output from the control device 163. The operation signal of the planting clutch motor 24 is determined to be effective by the control device 163 to stop the planting function, and the trunnion electric motor 103 outputs an actuation signal, and the trunnion 295 reaches a predetermined angle (target value) and outputs it. Further, the fertilizer application actuator 426a is actuated to cause the fertilizer transmission opening/closing member 422 to be in an ON state. This is called stopping the planting function.

By raising the output of the stepless speed change device 23 to a predetermined value and supplying the driving force to the planting device 52, the planting device 52 can be surely actuated while the traveling is stopped, thereby improving the planting accuracy and the fertilization accuracy.

If the processing flow outputted to the trunnion electric motor 103 of the trunnion 295 after the planting operation on/off member 25a is turned on is first, it is a planting device. The rotation speed of the seedling planting tool 52a of 52 is gradually increased, and the operation is unstable. However, according to the present configuration, the planting operation on/off member 25a is turned on after being output to the trunnion electric motor 103, and the rotation speed of the seeding tool 52a is smoothly rotated from the beginning, thereby stabilizing. .

In other words, when the output of the stepless speed change device 23 is rising, the rotation speed of the seedling planting tool 52a is also increased stepwise, so that the operation of the seedling planting tool 52a becomes unstable, but as in the present structure, when there is no segment When the output of the speed change device 23 reaches a fixed value, the rotation speed of the seed seeding tool 52a is immediately stabilized, and the operation is smooth.

In addition, when the previous trunnion 295 reaches the target value and the output of the planting operation on/off member 25a for outputting the signal to the switch-on clutch 24 is turned on, the planting operation is turned on/off. When the opening member 25a is in the ON state (corresponding to the "non-speed transmission forward output" and "planting on-delay time-out" period of FIG. 22 described later), when the control is stopped, the output of the planting clutch motor 24 is turned to the OFF side. The actuating signal causes the planting actuating on/off member 25a to be open. After the control is stopped, the ON time of stopping the planting position detecting member 430, that is, the time when the sub-shift switching operation member 17 is pressed to the stop planting position W is calculated to be too short, etc., in a time period not shown.

The structure is made as follows: even if the planting operation is performed on the opening/closing member 25a In the ON processing, the planting operation ON/OFF member 25a is also returned to the OFF state when the control is stopped, thereby preventing the planting operation from being turned on every time the sub-shift switching operation member 17 comes into contact with the stop planting position detecting member 430. The disconnecting member 25a is turned on/off, and malfunction can be prevented.

Then, when the control is stopped in the ON process of the planting operation on/off member 25a and the planting operation ON/OFF member 25a is in the OFF state, the actuation ON/OFF member is planted. After the disconnected state is reached, the seedling-planting tool 52a is rotated for a fixed time (for example, about 0.5 second to about 2 seconds) (rotation by inertia), and is output to the trunnrum electric motor 103 to make the trunnion 295 from the previous target value (ensurement is ensured) The rotational position of the trunnion arm that stops the output of the stepless speed change device at the time of the planting operation is a neutral position.

When the trunnion 295 is in the neutral position and the planting operation opening/closing member 25a is in the off state, the driving force is not supplied to the seeding tool 52a, whereby the stop position is the position at this time, so the seeding tool 52a is The regular stop position does not stop.

Therefore, the seeding tool 52a is rotated for a fixed period of time after the planting operation on/off member 25a is in the off state, whereby the seedling tool 52a is stopped at the regular stop position. This regular stop position is designed by the gear combination inside the seedling tool 52a. Therefore, the stop position of the seedling planting tool 52a is stabilized.

Then, after the planting operation opening/closing member 25a is turned off, the trunnion 295 is placed in the neutral position, and then the planting clutch motor 24 is actuated to cause the planting operation opening/closing member 25a to be connected. Pass state. The operator operates the sub-shift switching operation member 17 to stop the planting position W and plant a seed amount of seedlings, and sometimes forgets to turn on the planting operation opening/closing member 25a when starting the work. However, after the planting operation is stopped, the planting operation on/off member 25a is automatically turned on, whereby the work can be restarted as long as it travels at the planting speed of its state.

Further, a specific flowchart of the operation of stopping the planting when the sub-shift switching operation member 17 is operated to stop the planting position W is shown below.

Fig. 20 is a schematic flow chart showing the process of stopping the planting function. This treatment has five types of stop planting treatments 0 to 4, and is performed in the order of 1, 2, 3, and 4 from the stop of the planting process 0. Fig. 21 shows the flow of the stop planting process 0, Fig. 22 shows the flow of stopping the planting process 1, Fig. 23 shows the flow of stopping the planting process 2, Fig. 24 shows the flow of stopping the planting process 3, and Fig. 25 shows the stop planting. Process 4 of processing.

In the stop planting process 0 of FIG. 21, when the operation position of the main shift switching operation member 16 is the neutral position and the operation position of the sub-shift switching operation member 17 is also the neutral position, the stop of the planting function becomes effective (permitted), and Become a standby. Next, when the planting position detecting member 430 detects that the sub-shift switching operation member 17 is operated to stop the planting position W, the planting process 1 is stopped. Next, it is set from the control device 163 The planting on delay timer (predetermined time: for example, 1 second) of the signal for the operation of the planting clutch motor 24 is set, and the flow proceeds to the flow of the stop planting process 1 of FIG.

In the stop planting process 1, the trunnion electric motor 103 is rotated forward (forward side), and the trunnion 295 of the stepless speed change device 23 is rotated. Further, at this time, the position of the main shift switching operation member 16 is still at the neutral position, and the trunnion electric motor 103 rotates only the trunnion 295 toward the forward side, whereby the seedling planting portion 4 is in a state of transmitting power.

Then, after the setting time of the previous planting on-delay timer is elapsed (arrival time), the stop planting process 2 is set, and the actuation time (for example, 1 second to 2 seconds) at which the planting operation on/off member 25a is turned on is set. A signal for causing the planting clutch motor 24 to actuate is output from the control device 163. Next, the flow moves to the flowchart of the stop planting process 2 of FIG.

In the cessation of the planting process 2, the planting clutch motor 24 is actuated, the planting operation on/off member 25a is turned on, the planting process 3 is stopped, and the flow chart is moved to the stop planting process 3 of FIG. Next, in the stop planting process 3, after the previous exercise time (arrival time) is set, the stop planting process 4 is set, and the planting actuating on/off member 25a is turned off, and the time until the trunnion 295 is returned to the neutral position is set. After (for example, 1 second to 2 seconds), the planting operation on/off member 25a is turned off, and then moved to the flowchart of the stop planting process 4 of Fig. 25.

In the stop planting process 4, when the time until the previous trunnion 295 is returned, the trunnion 295 is rotated from the forward side to the stop side, and thereafter becomes the neutral position, and the flowchart is ended.

26 and 27 below show the overall flow after the above-described respective flowcharts are summarized. When the end of the planting operation is completed, the seeding tool 52a of the planting device 52 rotates once, the time when the planting seedling is finished is stopped, or when the operation of the auxiliary shift switching operation member 17 is suspended in the middle, FIG. 26 shows the flow chart of the former. Figure 27 is a flow chart showing the latter. In addition, FIG. 27 shows not only the latter but also the overall flow.

In FIG. 26, when the trunnion 295 of the stepless speed change device 23 is rotated toward the forward side or the reverse side, the general stepless speed change device output processing is performed when the planting process is not stopped. That is, the driving force corresponding to the operating position of the main shift switching operation member 16 is output. On the other hand, in the stop planting process (in any of the processes 0 to 4 described above), when the trunnion electric motor 103 outputs the trunnion 295 toward the stop side (corresponding to the "stepless speed change device" of FIG. When the output of the trunnion 295 is determined to be a neutral position, if the trunnion detecting member 113 detects that the trunnion 295 is at the neutral position, the planting process is stopped.

Then, when the planting process is stopped, it is determined whether or not the planting process 4 has been stopped, and when the planting process 4 has been stopped, the planting is performed. When the clutch motor 24 is actuated, the planting operation opening/closing member 25a is turned on. In the state of Fig. 26, the planting of the seedlings is basically carried out normally, and therefore, after the end of the planting process is stopped, the seedlings are transferred to a general planting operation. At this time, if the planting operation ON/OFF member 25a is still in the OFF state, there is a possibility that the planting start delay is delayed at the start of the traveling, and therefore, the planting operation ON/OFF member 25a is finally switched to the ON state. A step of.

By operating the planting operation on/off member 25a in the ON state, the sub-shift switching operation member 17 is operated to the position of the planting work speed, and the main shift switching operation member 16 is operated to the forward side, the start can be started immediately Planting operations. Then, the stop planting process 0 is set, and in order to stop the planting process 0, the next stop planting process is reset.

Further, even when the trunnion 295 is output toward the forward side (or the retreating side) in the stop planting process, it is output to a fixed angle (previous target value).

In FIG. 27, first, when the sub-shift switching operation member 17 is operated to stop the planting position W, the sub-shift switching operation member 17 is separated from the stop planting position W, and is detected by stopping the planting position detecting member 430. When the planting position W is not stopped, it is determined which process is to stop the planting process at that point in time.

At this time, in the process of stopping the planting process 1, the planting process 0 is stopped, and the trunnion electric motor 103 outputs the trunnion 295 toward the stop side (phase As shown in Fig. 25, "the stepless speed change device stops outputting". On the other hand, when the planting process is stopped and the planting process 0 is not stopped, it is determined whether or not the planting process 2 or 3 is stopped, and when the planting process 2 or 3 is stopped, the planting actuating on/off member 25a is turned off ( Corresponding to the "planting operation ON/OFF member OFF output" of Fig. 24, the stop planting process 0 is set, and the trunnion electric motor 103 outputs the trunnion 295 toward the stop side.

Fig. 28 is a view showing a configuration of a hydraulic circuit of the stepless speed change device 23 of the rice transplanter 1 of the present embodiment, Fig. 29 is a side sectional view showing the stepless speed change device 23, and Fig. 30 is a plan sectional view showing the stepless speed change device 23.

As shown in Fig. 28, a variable displacement type hydraulic pump A and a fixed displacement type hydraulic motor B constitute a stepless speed change device 23 connected via hydraulic closing circuits 266, 267, which is variable displacement type hydraulic pressure. The pump A adjusts the amount of hydraulic oil discharged from the input shaft 274 that receives the power from the engine 20 and is reciprocated by a plurality of pistons 248 arranged side by side, and the discharge direction is adjusted. The fixed displacement type hydraulic motor B is adjusted. The rotation speed and direction of the output shaft 275 are changed in accordance with the discharge amount of the hydraulic pump A and the discharge direction of the oil.

Further, as shown in Figs. 29 and 30, a part of the hydraulic closing circuits 266 and 267 is provided inside, and a port block 271 is disposed in a direction orthogonal to the input shaft 274 and the output shaft 275, and the port is built in. Block 271 and the internal block of the hydraulic pump side cylinder 247a of the hydraulic pump A and the built-in hydraulic motor B The blocks of the hydraulic motor side cylinders 247b are connected to each other to form the aforementioned hydraulic closing circuits 266, 267.

The hydraulic closing circuit 266 and the hydraulic closing circuit 267 shown in Fig. 28 constitute a closed circuit, and if the swash plate 69 on the variable displacement type hydraulic pump A side shown in Fig. 29 is increased in inclination angle toward the forward rotation side, it is closed via hydraulic pressure. The hydraulic pressure flowing from the circuit 266 to the side of the fixed displacement type hydraulic motor B becomes a high pressure, at which time the hydraulic closing circuit 267 on the opposite side of the hydraulic closing circuit 266 becomes a low pressure, and the oil discharged from the side of the fixed displacement type hydraulic motor B is sucked into the variable Displacement type hydraulic pump A.

The stepless transmission case 272 and the boost pump 273 of the variable displacement type hydraulic pump A and the fixed displacement type hydraulic motor B are built in the mouth block 271 shown in Figs. 29 and 30 (refer to the figure). The casings and the like of 28) are integrally formed to overlap each other, and the input shaft 274 and the output shaft 275 whose shaft directions are parallel to each other are supported. A hydraulic pump A and a trochoid rotor (not shown) of the booster pump 273 are disposed around the input shaft 274, and a hydraulic motor B is disposed around the output shaft 275.

The hydraulic pump A and the hydraulic motor B are provided with a plurality of cylinders 247 so as to be parallel to the axial direction of the input shaft 274 and the output shaft 275 to constitute a cylinder block, and a piston that slides along the axial direction is provided in each cylinder 247. 248. Each of the pistons 248 rotatably supports the front end portion by ball joints of the joint disc 277, and is disposed to be opposed to the swash plate 69. A thrust plate 278 is free to rotate about the shafts 274, 275.

The booster pump 273 is used to replenish oil from the tank port T toward the hydraulic closed circuits 266, 267 via the oil filter 280, the main relief valve 281, and the field valve (check valve Valves) 282a, 282b, a neutral valve 283, etc. are in communication with the hydraulic closed circuits 266, 267. A high pressure relief valve 285 is disposed throughout the two hydraulic closed circuits 266, 267.

The trunnion 295 is disposed in a direction orthogonal to the input shaft 274 such that the pin slider 298 of the crank arm 296 integral with the trunnion 295 at the front end of the trunnion 295 and the roller groove formed on the swash plate 69 69a Engagement, by rotating the trunnion electric motor 103 to rotate the trunnion arm of the trunnion 295, thereby causing the pin slider 298 to rock to adjust the inclination angle of the swash plate 69.

When the trunnion 295 is rotated to change the angle of the swash plate 69, the pressing position of the piston 248 is changed to switch the high pressure and low pressure of the hydraulic pump A.

Figure 31 is an enlarged view showing a portion of the piston 248. Generally, as shown in Fig. 31 (a), a dome type piston is used. However, if the R dimension of the tip end of the piston is small, the surface pressure becomes high and the strength becomes weak. On the contrary, if the R size is increased, there is a swash plate 69. The reaction force becomes large and the operational load of the trunnion 295 becomes heavy.

Therefore, as shown in FIGS. 31(b) and 31(c), the piston 248a on the side of the hydraulic pump A uses a piston having a small R size to reduce the operational load of the trunnion electric motor 103 on the trunnion 295, often at a fixed angle. The piston 248b on the side of the hydraulic motor B that is in contact with the splice tray 277 is preferably a piston having a large R size to secure the strength.

Fig. 31 (b) shows the piston 248a on the side of the hydraulic pump A, and Fig. 31 (c) shows the piston 248b on the side of the hydraulic motor B. For example, the R dimension of the piston 248a is set to 24 (mm), and the R dimension of the piston 248b is set to 28 (mm).

In general, the piston 248a of the hydraulic pump A and the piston 248b of the hydraulic motor B each use a piston of the same shape, and the R dimension of the tip end of the piston 248 is changed as described above on the side of the hydraulic pump A and the hydraulic motor B side. The effect of the description.

In other words, the hydraulic pump A side is actuated by the swash plate 69, and the contact position between the joint disk 277 and the R portion of the tip end of the piston 248a fluctuates. Therefore, the R-size which exhibits an increase in strength and a small reaction toward the swash plate 69 is employed. The small piston, with respect to the hydraulic motor B side, since the engaging portion 277 and the R portion of the front end of the piston 248b are often in contact at a fixed angle, a piston having a large R size at the front end requiring a certain degree of strength is used, whereby the ear can be provided. The shaft 295 is operated with a stepless speed change device 23 that is light in load and high in pressure resistance.

FIG. 32 shows an example different from the piston 248 of FIG.

Further, as shown in FIG. 32(a), a spiral groove 248c may be provided on the outer circumferential surface (side surface) of the piston 248. In the dome-shaped piston, if the sliding portion U on the side surface causes oil film shortage, abnormal wear such as abrasion and friction is caused between the dome-shaped piston and the cylinder block, but by the outer circumference. The spiral groove is provided on the surface to easily form an oil film, thereby preventing these problems.

In other words, the hydraulic oil is introduced into the groove 248c in accordance with the forward and backward movement of the piston 248, thereby promoting the formation of the oil film and having the effect of preventing an abnormal situation such as abnormal wear.

Further, the shape of the groove is not limited to a spiral shape, and may be a groove 248d formed in a lattice shape as shown in Fig. 32(b) or a groove 248e formed in a wedge shape as shown in Fig. 32(c). Further, the piston 248 shown in Fig. 32 is common to both the piston 248a of the hydraulic pump A and the piston 248b of the hydraulic motor B.

[Industrial Availability]

The present invention can be applied to a passenger-type seedling transplanting machine equipped with a fertilizing device and a seedling planting portion.

11‧‧‧ Rear wheel

200R‧‧‧Rear gearbox on the right

321aR‧‧‧First bevel gear

321R‧‧‧second input shaft

324aR‧‧‧Protruding

324bR‧‧‧Switching the root of the shifter

324R‧‧‧Switching Displacement

330R‧‧‧second bevel gear

331R‧‧‧ small diameter gear

332R‧‧‧ Large diameter gear

340R‧‧‧second rotating shaft

341R‧‧‧Right rear axle

401‧‧‧ Fertilizer transmission components

412‧‧‧fourth bevel gear

420‧‧‧ Fertilization transmission mechanism

422‧‧‧ Fertilization drive on/off member

422a‧‧ Fertilization Department

422b‧‧‧ third clutch jaw

425‧‧‧third bevel gear

425a‧‧‧4th clutch jaw

426a‧‧ fertilization drive actuator

427‧‧‧ Cable

E‧‧‧ arrow

Claims (9)

A seedling transplanting machine is provided with a seedling planting part (4) in a manner of lifting and lowering at a rear portion of the traveling vehicle body (2); a floating body (55) which is in contact with the farmland surface is disposed in the seedling planting part (4); a fertilizer application device (5) for supplying fertilizer to the farmland; an angle detecting member (162) for detecting a rotation angle of the floating body (55); and an image detecting device (4) for switching the seeding planting portion (4) in conjunction with the rotation of the traveling vehicle body (2) a rotary linkage mechanism (T) for lifting and lowering the seedling planting part (4) and the fertilizing device (5); and a fertilizing transmission on/off member for turning on/off the operation of the fertilizing device (5) (422): The control device (163) is configured to apply the fertilizer when the seedling planting portion (4) lowers the detection angle of the angle detecting member (162) by a predetermined angle range by the rotation linkage mechanism (T). The drive on/off member (422) is in an on state. The seedling transplanting machine according to claim 1, wherein the planting actuating on/off member (25a) for turning on/off the planting operation of the seedling planting portion (4) is provided; and the control device (163) is provided. When the seedling planting part (4) is raised by the aforementioned rotation interlocking mechanism (T), the planting actuating on/off member (25a) and the fertilizing transmission on/off member (422) are turned off. When the seedling planting portion (4) is lowered and the angle detected by the angle detecting member (162) is within a predetermined angle range, the planting actuating on/off member (25a) is kept in the off state to make the fertilizing transmission The on/off member (422) is in the on state state. The seedling transplanting machine according to claim 1 or 2, wherein the left and right rear wheels (11, 11) are provided in the traveling vehicle body (2); and the driving forces are respectively supplied to the left and right rear wheels (11, 11). Left and right rear wheel gearboxes (200L, 200R); one of the left and right rear wheel gearboxes (200L, 200R) is provided with a driving force for supplying the driving device (5) via the rear wheel gearbox (200L, 200R) The fertilization transmission member (401) constitutes a fertilization transmission mechanism (420) with the aforementioned fertilization transmission ON/OFF member (422) for turning on/off the transmission to the fertilization transmission member (401). A seedling transplanting machine as claimed in claim 3, wherein a fertilizing transmission actuator (426a) for performing on/off of the aforementioned fertilization transmission on/off member (422) is provided; and the fertilization transmission actuator is provided (426a) a fertilization transmission switching member (428) that operates; the control device (163) is configured to satisfy a detection angle of the angle detecting member (162) at a predetermined angle in the operation of the rotation interlocking mechanism (T) The fertilization transmission actuator (426a) is provided when the planting actuation on/off member (25a) is in an ON state or any of the above-described fertilization transmission switching members (428) is turned on. Actuating to cause the fertilization transmission on/off member (422) to be in an on state; causing one end portion of the fertilizing transmission member (401) to protrude toward the outside of the rear wheel gear box (200L, 200R), in the fertilizing transmission member (401), in the portion protruding from the aforementioned rear wheel gear box (200L, 200R) A manually operated member (426) for supplying fertilizer to the fertilizing device (5) by manual operation is provided. A seedling transplanting machine according to claim 4, wherein a rotary operation member (34) for steering the traveling vehicle body (2) is provided; and left and right front wheels (10, 10) are provided in the traveling vehicle body (2); The direction of the left and right front wheels (10, 10) is changed in conjunction with the operation of the rotary operating member (34), and the side clutch (87) of the rear wheel (11) on the inner side of the rotation during rotation is turned off. a steering mechanism (S); a rotation direction detecting member (193) for detecting a rotational operation direction of the rotational operation member (34); and the control device (163) configured to detect the rotation direction detecting member (193) When the detected rotation direction is that the rear wheel gear case (200R) on the left and right sides of the fertilizing transmission member (401) is inside the rotation, it is earlier than when the rear wheel gear case (200L) on the other side of the left and right sides is rotated inside. The timing of the fertilization transmission on/off member (422) being in the on state is performed by the aforementioned fertilization transmission actuator (426a). The seedling transplanting machine according to claim 1 or 2, wherein an engine (20) is disposed in the traveling body (2); and the front wheel (10, 10) and the rear wheel (11, 11) are disposed from the engine (20) a sub-transmission device (571) of the transmission; an auxiliary shift switching operation member (17) for performing a switching operation of the sub-transmission device (571); and a sub-distribution for detecting an operation position of the sub-shift switching operation member (17) a shift operating position detecting member (17b); forming the auxiliary shifting device (571) to block from the aforementioned engine (20) The aforementioned auxiliary shift switching operation member that switches to the traveling neutral state toward the front wheels (10, 10) and the rear wheels (11, 11) and causes the aforementioned planting actuating ON/OFF member (25a) to be in the OFF state (17) a neutral position (N), and the side of the neutral position (N) is switched to switch the driving to the front wheel (10, 10) and the rear wheel (11, 11). The shut-off planting position (W) of the auxiliary shifting operation member (17) in the stopped planting state in which the opening/closing member (25a) is in the ON state, and is set to detect the auxiliary shifting switch The operation member (17) is located at the stop planting position detecting means (430) of the stop planting position (W); the control device (163) is configured to detect the sub-shifting switching operation by using the stop planting position detecting means (430) When the member (17) is operated to stop the planting position (W), and the rotation angle of the floating body (55) is within a predetermined angle range, the planting operation of the seedling planting portion (4) is turned on/off. The on/off member (25a) is in an on state, and even if the aforementioned The stop planting position detecting member (430) detects that the sub-shift switching operation member (17) is operated to stop the planting position (W), and the rotation angle of the floating body (55) detected by the aforementioned angle detecting member (162) is When the predetermined angle range is outside, the planting operation ON/OFF member (25a) is placed in the OFF state. The seedling transplanting machine according to claim 1 or 2, wherein an engine (20) is disposed in the traveling body (2); and the front wheel (10, 10) and the rear wheel (11, 11) are disposed from the engine (20) The auxiliary transmission of the transmission (571); a sub-shift switching operation member (17) that performs a switching operation of the sub-transmission device (571); a sub-transmission operation position detecting member (17b) that detects an operation position of the sub-shift switching operation member (17); Switching the auxiliary shifting device (571) to the traveling neutral state by blocking the transmission from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) and causing the aforementioned planting operation to turn on/off the member (25a) a neutral position (N) of the aforementioned auxiliary shift switching operation member (17) in an open state, and switching to a side of the neutral position (N) to the front wheel (10, 10) and the rear wheel (11, 11) The sub-shift switching operation member (17) in a state in which the planting operation ON/OFF member (25a) is in an ON state and the planting device (52) is actuated in a stopped state in a state where the transmission is stopped (17) Stopping the planting position (W), and setting the stop planting position detecting member (430) at which the detecting sub-shift switching operation member (17) is located at the stop planting position (W); setting the engine (20) toward the auxiliary shifting device (571) Driveless stepless transmission (23); set to the stepless gear a main shift switching operation member (16) that performs a shifting operation; a main shift operating amount detecting member (16b) that detects an operation of the main shift switching operating member (16); and a setting according to the main shifting operation amount A trunnion actuator (103) that detects the detecting member (16b) to rotate the trunnion (295) of the aforementioned stepless transmission (23); and provides a trunnion that detects the rotational position of the trunnion (295) a detecting member (113); the control device (163) is configured to detect a main shift switching operation member by using the main shift operation amount detecting member (16b) (16) being operated to a neutral position at which the traveling of the traveling vehicle body (2) is stopped, and when the angle detecting member (162) detects that the rotation angle of the floating body (55) is within a predetermined angle range, if the foregoing When the sub-shift switching operation member (17) is operated to stop the planting position (W), the planting operation ON/OFF member (25a) is turned on. The seedling transplanting machine according to claim 3, wherein an engine (20) is disposed in the traveling body (2); and the driving is provided from the engine (20) toward the front wheel (10, 10) and the rear wheel (11, 11) a sub-transmission device (571); an auxiliary shift switching operation member (17) for performing a switching operation on the sub-transmission device (571); and a sub-transmission operation for detecting an operation position of the sub-shift switching operation member (17) Position detecting member (17b); forming the auxiliary shifting device (571) to switch from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) to switch to the traveling neutral state and to make the aforementioned Planting the neutral position (N) of the aforementioned auxiliary shift switching operation member (17) in which the actuation opening/closing member (25a) is in the off state, and switching to the side of the front wheel at the side of the neutral position (N) (10, 10) and the state in which the rotation of the rear wheels (11, 11) is stopped, and the planting operation on/off member (25a) is turned on, and the planting device (52) is stopped in the planting state. The auxiliary shifting operation member (17) stops the planting position (W), and sets the detecting sub-shifting switching operation Member (17) located at the planting position stop (W) is stopped planting position detecting means (430); said control means (163) system configured to: stop using the The planting position detecting member (430) detects that the sub-shift switching operation member (17) is operated to stop the planting position (W), and when the rotation angle of the floating body (55) is within a predetermined angle range, the seedling planting portion is made (4) The planting operation on/off member (25a) in which the planting operation is turned on/off is in an ON state, and even if the sub-shift switching operation member (17) is detected by the aforementioned stop planting position detecting member (430) The operation is to stop the planting position (W), and when the rotation angle of the floating body (55) detected by the angle detecting member (162) is outside the predetermined angle range, the planting operation opening/closing member (25a) is caused. Is in the disconnected state. The seedling transplanting machine according to claim 3, wherein an engine (20) is disposed in the traveling body (2); and the driving is provided from the engine (20) toward the front wheel (10, 10) and the rear wheel (11, 11) a sub-transmission device (571); an auxiliary shift switching operation member (17) for performing a switching operation on the sub-transmission device (571); and a sub-transmission operation for detecting an operation position of the sub-shift switching operation member (17) Position detecting member (17b); forming the auxiliary shifting device (571) to switch from the engine (20) toward the front wheels (10, 10) and the rear wheels (11, 11) to switch to the traveling neutral state and to make the aforementioned Planting the neutral position (N) of the aforementioned auxiliary shift switching operation member (17) in which the actuation opening/closing member (25a) is in the off state, and switching to the side of the front wheel at the side of the neutral position (N) (10, 10) and the stop of the transmission of the rear wheels (11, 11), the planting operation on/off member (25a) is turned on, and the planting device (52) is stopped. a stop planting position (W) of the auxiliary shifting operation member (17) in the planting state, and a stop planting position detecting member (430) in which the detecting sub-shift switching operation member (17) is located at the stop planting position (W); a stepless shifting device (23) that is driven from the engine (20) toward the auxiliary shifting device (571); a main shifting switching operating member (16) that performs a shifting operation on the stepless shifting device (23); a main shift operation amount detecting member (16b) that detects the operation of the shift switching operation member (16); and sets the trunnion of the aforementioned stepless shifting device (23) according to the detection of the main shift operation amount detecting member (16b) ( 295) a rotating trunnion actuator (103); an trunnion detecting member (113) for detecting a rotational position of the trunnion (295); and the control device (163) configured to utilize the aforementioned main shifting The operation amount detecting member (16b) detects that the main shift switching operation member (16) is operated to a neutral position at which the traveling of the traveling vehicle body (2) is stopped, and the floating body is detected by the aforementioned angle detecting member (162) (55) When the angle of rotation is within a predetermined angle range, Switching operation of said auxiliary shift means (17) operating to stop planting position (W), so that the plant is actuated on / off member (25a) is in the ON state.