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1. 发明专利

JPH1026199A TRANSMISSION STRUCTURE FOR RICE PADDY WORK VEHICLE 失效
公开(公告)号：JPH1026199A
公开(公告)日：1998-01-27
申请号：JP8484797
申请日：1997-04-03
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： F16H9/12
摘要： PROBLEM TO BE SOLVED: To improve durability and transmission reliability of a belt type of continuously variable transmission mounted on a rice paddy work vehicle with its front portion having an engine and its rear portion having a work device. SOLUTION: A belt type of continuously variable transmission 18 covered with a case 17 is installed in a power transmission system in the vicinity of a transmission case 9 provided in the rear part of a vehicle. Connection members 30, 30a, 30b are disposed between operating parts 36, 36 of both moving portions 22a, 23a of a first and a second split pulleys 22, 23. Changing speed with the continuously variable transmission 18 is performed as the connection members 30, 30a, 30b are moved with a speed change operation member 31 supported on the case 17 in a specified direction or opposite thereto.

2. 发明专利

JPH08164768A TRAVEL CONTROLLER OF WORKING MACHINE 失效
公开(公告)号：JPH08164768A
公开(公告)日：1996-06-25
申请号：JP31107894
申请日：1994-12-15
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： B60K31/00
摘要： PURPOSE: To check oil temperature rise in a hydrostatic continuously variable transmission(HST) without lowering the relief pressure by operating an alarm at a time when a difference between setting revolution to be found out of shift operated variable information and actual outputting revolution exceeds the setting range. CONSTITUTION: A feedback control mans F so a controller 12 operates motor- driven cylinder 8 on the basis of each detection information of a rotational frequency detector 15 of an engine 3 and a first potentiometer 10 detecting the operating position of a shift lever 9 so as to make the setting revolution of an output shaft 4a to be set up by operation of the shift lever 9 and the actual outputting revolution of the output shaft 4a accord with each other. In addition, when a difference between the setting revolution of the output shaft 4a to be found out of shift operated variable information detected by a second potentio meter 21 detecting the operating position of a trunnion shaft 4t and the actual outputting revolution of the output shaft 4a has exceeded the setting range, an alarm 22 operates via a comparing control means H.

3. 发明专利

JPH08156642A TRAVEL CONTROL DEVICE OF WORK MACHINE 失效
公开(公告)号：JPH08156642A
公开(公告)日：1996-06-18
申请号：JP30511194
申请日：1994-12-08
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： B60K31/00
摘要： PURPOSE: To provide a travel control device of a work machine by which light speed change operability is obtained by an actuator driving operation structure and a speed change condition according to setting and a reliable neutral condition according to neutral operation can be obtained and whose operation is light and which is excellent in reliability. CONSTITUTION: A travel control device of a work machine is provided with an HST 4 for travel, a motor-driven cylinder 8 for speed change, a speed change lever 9 having a potentiometer 10 and a pickup A to detect rotating speed of an HST output shaft 4a, and is provided with a feedback control means F to drive the motor-driven cylinder 8 on the basis of detecting information of both detecting means 10 and A so that preset rotating speed of the output shaft 4a set by operation of the speed change lever 9 and actual output rotating speed of the output shaft 4a coincide with each other, and is provided with a rotational direction discriminating means B to discriminate the rotational direction of the HST output shaft 4a, and is provided with a correction control means S by which the pickup A, the rotational direction discriminating means B and the motor-driven cylinder 8 are connected to each other in a condition where speed change operation is performed on the HST 4 so that its rotating speed is set in zero when the speed change lever 9 is neutral and the output shaft 4a is rotating.

4. 发明专利

JPH08109964A TRAVELING SPEED CHANGE STRUCTURE FOR WORK VEHICLE 失效
公开(公告)号：JPH08109964A
公开(公告)日：1996-04-30
申请号：JP24585794
申请日：1994-10-12
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： F16H61/40 , F16H61/435
摘要： PURPOSE: To permit the start free from obstruction even at a working site having a large traveling resistance, as for the traveling speed change structure for a work vehicle which is equipped with a static hydraulic pressure type continuously variable transmission for traveling and is equipped with an actuator for operating the swash plate of the static hydraulic pressure type continuously variable transmission to the angle corresponding to the operation position of a speed change operating tool (speed change lever, etc.). CONSTITUTION: When a speed change operating tool 10 is operated between a neutral stop position N and the prescribed low speed positions F1 and R1, the swash plate (trunnion shaft 6) of a static hydraulic pressure type continuously variable transmission is operated to the neutral stop position N. When the speed change operating tool 10 is operated to the high speed side, exceeding the low speed positions F1 and R1, the swash plate (trunnion shaft 6) is operated to the high speed side, having the angles A1 and B1 corresponding to the prescribed low speed positions F1 and R1, as starting points.

5. 发明专利

JPH07300077A RIDE-ON TYPE PADDY FIELD WORKING MACHINE 失效
公开(公告)号：JPH07300077A
公开(公告)日：1995-11-14
申请号：JP9279494
申请日：1994-05-02
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： A01B69/00 , B60K17/348 , B62D11/08
摘要： PURPOSE:To constitute a front wheel speed change device so as not to be unreasonably switched to a speed increasing state in ordinary traveling in a paddy field which is not of a rectangular shape and of a deformed shape in a four wheel drive ride-on type paddy field working machine provided with the front wheel speed change device which carries out switching into a speed increasing state wherein the front wheels are driven at a speed higher than that of rear wheels in association with the steering operation of front wheels. CONSTITUTION:In a steering range A in which front wheels 1 can be steered to the right and left, if the front wheels 1 are steered up to a position in the vicinity of the right or left steering limit AR or AL, a front wheel speed change device 14 is changed over from a standard operating mode to a speed increasing mode.

6. 发明专利

JPH07170819A SULKY RICE TRANSPLANTER 失效
公开(公告)号：JPH07170819A
公开(公告)日：1995-07-11
申请号：JP31931393
申请日：1993-12-20
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： A01B71/02 , A01C11/02
摘要： PURPOSE:To provide a sulky rice transplanter mounted with both 1st and 2nd PTO shafts for the seedling planting device, so designed that the 2nd PTO shaft and a hydraulic pump for the working device can be driven irrespective of the operation of the main clutch. CONSTITUTION:This sulky rice transplanter is so designed that a mechanical power takeout mechanism 23 is equipped to draw mechanical power branchedly in a parallel way from transmission systems 9, 11 between an engine 3 and the main clutch 10, and a hydraulic pump 27 is connected to this mechanism 23, and the mechanical power from this mechanism is transmitted to the 2nd PTO shaft 22.

7. 发明专利

JPH07123819A LIFT CONTROLLING STRUCTURE OF SEEDLING PLANTING APPARATUS OF RICE TRANSPLANTER 失效
公开(公告)号：JPH07123819A
公开(公告)日：1995-05-16
申请号：JP27917493
申请日：1993-11-09
申请人： KUBOTA KK
发明人： OTSUBO HIROSHI
IPC分类号： A01C11/02
摘要： PURPOSE:To enable the lift control of a seedling planting apparatus of a rice transplanter based on the rigorous setting of the planting depth. CONSTITUTION:A mud face contacting member 16 haying a sleigh-form with lifted front part and following the mud face of a field by contacting with the face is placed at a fixed position of a seedling planting apparatus in a state freely tiltable around the front part. The ground contacting part 16a of the free end of the mud face contacting member 16, the planting point (a) with a seedling planting mechanism and the float-connection point P2 at the free end of each float supporting arm 12 are positioned on nearly the same horizontal line by a plan view. The depth of the ground float 7 sunk in the mud face is calculated based on the data transmitted from an angle sensor S detecting the tilting angle of the mud face contacting member 16 and the seedling planting apparatus is lifted or lowered in such a manner as to keep the sinking depth within a preset range.

8. 发明专利

JPH0759418A TRAVELING CONTROLLING MECHANISM OF RICE TRANSPLANTER 失效
公开(公告)号：JPH0759418A
公开(公告)日：1995-03-07
申请号：JP21113193
申请日：1993-08-26
申请人： KUBOTA KK
发明人： FUJII JIRO , KITA KENJI , TANI SATORU , MUKAI TAKESHI , FURUKAWA KAZUO , OTSUBO HIROSHI
IPC分类号： A01C11/02
摘要： PURPOSE:To prevent abrupt start during engagement and disengagement of a main clutch in spite of light gear change operation of an infinitely variable gear. CONSTITUTION:A traveling transmission system of a machine body is equipped with a hydraulic infinitely variable gear 11 and the infinitely variable gear 11 is operated for gear change by an electrically-driven device 22. A traveling controlling mechanism of rice transplanter is provided with a velocity setting device 23 for setting the objective velocity based on a manual operation, a clutch operation detecting switch 33 for recognizing clutch disengagement operation by a handling tool 32 of a main clutch attached to a traveling transmission system and a control device 25 which controls the electrically-driven device 22 so as to make the traveling velocity of the machine body reach the objective velocity set by the velocity setting device 23 and regulates the electrically-driven device 22 to make the infinitely variable gear 11 be in a neutral stop state based on the detected result of the clutch operation detecting switch 33 irrespective of the objective velocity.

9. 发明专利

JPH0752668A FOUR-WHEEL-DRIVE PADDY WORKING VEHICLE 失效
公开(公告)号：JPH0752668A
公开(公告)日：1995-02-28
申请号：JP20480393
申请日：1993-08-19
申请人： KUBOTA KK
发明人： ARATA TATSUO , OTSUBO HIROSHI
IPC分类号： B60K17/348
摘要： PURPOSE:To allow a four-wheel-drive paddy working vehicle to smoothly move in a small circle when making a turn at a ridge between paddies, without damaging the surface of the paddies. CONSTITUTION:A four-wheel-drive paddy working vehicle is provided with a rear-wheel transmission 10 which can be freely switched between a normal state in which front 1 and rear 2 running wheels are driven at approximately equal speeds and a rear-wheel decelerating state in which the rear wheels 2 are driven at lower speed than the front wheels 1, and when the body of the vehicle comes to a ridge between paddies and a working clutch 12 is switched off, the rear-wheel transmission 10 is automatically switched from the normal state to the rear-wheel decelerating state in accordance with the switching operation.

10. 发明专利

JPH078039A PRELIMINARY SEEDLING STORING STRUCTURE FOR RICE TRANSPLANTER 失效
公开(公告)号：JPH078039A
公开(公告)日：1995-01-13
申请号：JP15840193
申请日：1993-06-29
申请人： KUBOTA KK
发明人： FUJII JIRO , OTSUBO HIROSHI , KITA KENJI , TANI SATORU
IPC分类号： A01C11/02
摘要： PURPOSE:To simply send preliminary seedlings on a preliminary seedling placing stand at the lowest step side of the preliminary seedling stand to a seedling placing stand by making gaps, between the preliminary seedling placing stands vertically laid plural steps between a driver seat and the seedling placing stand, adjustable in the vertical direction. CONSTITUTION:Preliminary seedling placing stands 8 are laid vertically in plural steps between a driver seat 3 and a seedling placing stand 4 of a seedling placing device 2. A machine body 1 of a rice transplanter is equipped with the preliminary seedling placing stands in such a way that gaps between mutually and vertically adjacent preliminary seedling placing stands are adjustable. Consequently, preliminary seedlings between preliminary seedlings at the lowest step and the bottom of the preliminary seedling placing stand at the upper side are made readily graspable.

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