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41. 发明专利

JPH10183693A HYDRAULIC CIRCUIT FOR WORKING MACHINE 失效
公开(公告)号：JPH10183693A
公开(公告)日：1998-07-14
申请号：JP34586896
申请日：1996-12-25
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： SUZUOKA KAZUNORI
IPC分类号： E02F9/22
摘要： PROBLEM TO BE SOLVED: To allow a working cylinder to operate according to set pressure without being influenced by the set pressure of a running relief valve when the relief pressure of a work relief valve is switched from an ordinary relief pressure to a pressure-up relief pressure. SOLUTION: The hydraulic circuit for working machine is so constituted that a running relief valve 21 and a work relief valve 15 both are constituted as a two-stage relief valve whose relief pressure can be switched between ordinary relief pressure and pressure-up relief pressure. And with respect to relief pressure of the valve 21, both the ordinary relief pressure and pressure-up relief pressure are set at a pressure higher than the relief pressure of the work relief valve 15 and the relief pressures of both the valves 21, 15 can be switched simultaneously to pressure-up relief pressure.

42. 发明专利

JPH10181614A STEERING HANDLE TILTING DEVICE FOR CONSTRUCTION MACHINE 失效
公开(公告)号：JPH10181614A
公开(公告)日：1998-07-07
申请号：JP35719496
申请日：1996-12-25
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： FUJII ATSUSHI , SHIROGAMI TADAKI
IPC分类号： B62D1/18
摘要： PROBLEM TO BE SOLVED: To facilitate tilting operation by arranging a bar member in the tilting direction of a column shaft, and constituting an oblong hole formed at the upper part of the bar member, and a tilting bracket fixed to a column shaft, in such a way as to be selectively put in a fixed state and a fixing released state by the operation of a locking lever. SOLUTION: When a locking lever 13 in a tilting device 1 is operated into a lock position (a), a protruding key part 29 protrusively provided on the end face side of a base boss part 14 of the lever 13 is not fitted into an oblong hole part 9 of a bar member 8, so that the top face of the protruding key part 29 is brought into pressure contact with the relative outer end face of the bar member 8 by the spring force of a disc spring 17. Large frictional force therefore acts between the relative opposed faces of the bar member 8 and a tilting bracket 12, and a column shaft 6 is locked into a required tilt angle position. When the locking lever 13 is then operated into an unlock position on the rear side to fit the protruding key part 29 into the inner width edge part of the oblong hole 9 of the bar member 8, the column shaft 6 can be tilted and adjusted.

43. 发明专利

JPH10159133A CONTROL DEVICE AND CONTROL METHOD OF BATTERY DRIVEN WORKING MACHINE 失效
公开(公告)号：JPH10159133A
公开(公告)日：1998-06-16
申请号：JP9922197
申请日：1997-04-16
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： KINUKAWA HIDEKI , KOMIYAMA MASAYUKI
IPC分类号： E02F9/20
摘要： PROBLEM TO BE SOLVED: To continue work for a long period of time by extending longevity of a battery by efficiently supplying electric power to an electric motor. SOLUTION: This control device is furnished with an electric motor 3 driven by taking electric power from a battery 2, a hydraulic pump 4 driven by this electric motor 3, a hydraulic motor 12b driven by hydraulic fluid discharged from the hydraulic pump 4, a working member to carry out specified work by driving of the hydraulic motor 12b and an operation lever 51 to operate the working member by changing feed and check the hydraulic fluid discharged from the hydraulic pump 4. Additionally, the operation lever 51 is constituted free to operate between a neutral position where the hydraulic motor 12b stops working and a working position where the hydraulic motor 12b works, and an acceleration trimmer 65 to control electric power supply quantity from the battery 2 to the electric motor 3 in a state where the operation lever 51 is operated to the working position is provided.

44. 发明专利

JP2765387B2 失效
公开(公告)号：JP2765387B2
公开(公告)日：1998-06-11
申请号：JP21711792
申请日：1992-07-22
申请人： YUTANI JUKO KK
发明人： FUJII ATSUO , FUJIMOTO YOSHIAKI , FUJIMOTO SATOSHI , KONO YASUSHI
IPC分类号： B60J1/00 , B60J1/02 , B60J1/04 , E02F9/16 , E05D15/38 , E05F15/10

45. 发明专利

JPH10152865A BATTERY DRIVEN WORKING MACHINE 失效
公开(公告)号：JPH10152865A
公开(公告)日：1998-06-09
申请号：JP31232596
申请日：1996-11-22
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： KINUKAWA HIDEKI , KOMIYAMA MASAYUKI
IPC分类号： E02F9/20 , F15B11/00
摘要： PROBLEM TO BE SOLVED: To restrain the installation cost from increasing, to contribute to a long use life of a battery. SOLUTION: A battery driven working machine is composed of a motor 32 electrically driving by power from a battery 2, a hydraulic pump 4 driven by the motor 3, a plurality of hydraulic motors 12b and the like driven by hydraulic oil fed from the pump 4, working members associated with the hydraulic motors 12b and the like, a control means 5 for operating the working members, supply and return pipe lines for circulating hydraulic oil from an oil tank under operation of the pump 4, and a returns oil manifold for merging hydraulic oil having not been fed into the hydraulic motors 12b and the like so as to return the same into the oil tank. In this arrangement, a differential pressure meter for detecting a flow rate of hydraulic oil in the return oil manifold is provided. Thus, a control means controls the power to the motor 3 in an inverse proportion to a flow rate detected by the differential pressure meter.

46. 发明专利

JPH10152859A METHOD OF CONTROLLING SLOPE-CUT OPERATION OF HYDRAULIC SHOVEL AND DEVICE FOR CONTROLLING THE SAME 失效
公开(公告)号：JPH10152859A
公开(公告)日：1998-06-09
申请号：JP31105996
申请日：1996-11-21
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： TAJI HIROSHI
IPC分类号： E02F3/43 , E02F9/20 , E02F9/22 , F15B11/02
摘要： PROBLEM TO BE SOLVED: To facilitate slope-cut operation of a hydraulic shovel by lowering the responsiveness and speed of a bucket when a bucket is ejected during pulling of an arm. SOLUTION: In a method of controlling slope-cut operation, pilot selector valves 7, 8, 9 for respectively controlling hydraulic cylinders 1, 2, 3, for a boom, an arm and a bucket are operated by hydraulic remote-control valves 10, 11, 12 for delivering pilot secondary pressure in accordance with degrees of manipulation of control levers, respectively. With this arrangement, when the bucket is ejected during pulling of the arm, both operations are detected by pressure sensors 20, 21, and a second pump 14 is controlled by a controller 22 so as to lower hydraulic pressure for driving the bucket cylinder 3 in order to lower the speed of bucket ejecting operation.

47. 发明专利

JPH10140610A MACHINE BODY LIFTING STRUCTURE OF HYDRAULIC SHOVEL 失效
公开(公告)号：JPH10140610A
公开(公告)日：1998-05-26
申请号：JP32109596
申请日：1996-11-14
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： MITSUNARI YUKIO , MORI OSAMU
IPC分类号： E02F9/10
摘要： PROBLEM TO BE SOLVED: To surely hold and lift up a machine body in substantially horizontal state by providing a lifting hook member in one part of a revolving superstructure on a vertical line passing about the center of gravity of the machine body in a machine body lifting structure for hydraulic shovel having the revolving superstructure connected to a base carrier. SOLUTION: The roof 12 of a canopy 11 is tilted down on the front side so that the roof 12 never interferes with the vertical line Y-Y passing the center of gravity G of machine. A wire rope 24 is caught by the suspending hole of a bracket mounted on a plate part for a revolving superstructure 2a main frame through a slinging shackle. Since the position of the suspending hole is set on the vertical line Y-Y passing the center of gravity G, the wire rope 24 never interferes with the roof 12 of the canopy 11 when lifted by a crane, and the machine body can be surely held and lifted up in horizontal state.

48. 发明专利

JPH10110542A CONTROL DEVICE OF PULVERIZER 失效
公开(公告)号：JPH10110542A
公开(公告)日：1998-04-28
申请号：JP26459096
申请日：1996-10-04
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： YAMASHITA KOJI
IPC分类号： E04G23/08 , F15B20/00
摘要： PROBLEM TO BE SOLVED: To surely perform the pulverization with excellent time balance. SOLUTION: A control device of a pulverizer is provided with a pulverization cylinder 2 to open/close a pulverizer 1, and a control valve 3 to control the action of the pulverization cylinder 2. The load pressure Ph to be applied to the pulverization cylinder 2 during pulverization is detected by a load pressure sensor 11, and the detected value is inputted in a controller 9, the controller 9 judges that the pulverization is completed based on the change in the load pressure, and the operation of the control valve 3 to the closing side is automatically stopped, and the control valve is operated to the open side.

49. 发明专利

JPH10103306A ACTUATOR OPERATING CHARACTERISTIC CONTROLLER 失效
公开(公告)号：JPH10103306A
公开(公告)日：1998-04-21
申请号：JP28028196
申请日：1996-09-30
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： TAJI HIROSHI
IPC分类号： F15B11/028 , E02F9/22 , F15B11/16 , F15B11/17
摘要： PROBLEM TO BE SOLVED: To select high responsiveness and fine operability by outputting a cut valve control signal based on a characteristic command value and an operation signal and controlling a cut valve with the proportional characteristic according to the characteristic command value for the operation signal by a control means. SOLUTION: At the time of a boom up signal operation, the bleed-off of the main spool of a pilot switching valve 14 for boom is made to have a characteristic in which fine operability is taken into consideration. When high responsiveness is required, a cut valve 17 R at main spool downstream of the pilot switching valve 14 for boom is simultaneously closed according to the closing of the main spool. Namely, synthetic bleed-off opening area is closed than normal opening area by gradually closing the cut valve 17 R in proportion to pilot pressure for boom to actuate the pilot port 50 of the pilot switching valve 14 for boom and responsiveness to a lever operation can be improved by a double throttling effect. If a boom down is also controlled in the same way, the boom down is effective at the time of an slop tamping work and responsiveness is improved and is effective also at the time of a bucket mud removing and an earth scattering.

50. 发明专利

JPH10102546A HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE 失效
公开(公告)号：JPH10102546A
公开(公告)日：1998-04-21
申请号：JP28028296
申请日：1996-09-30
申请人： YUTANI JUKO KK , KOBE STEEL LTD
发明人： DOI KAZUYUKI
IPC分类号： E02F9/22 , F15B11/02 , F15B11/17
摘要： PROBLEM TO BE SOLVED: To generate no fluctuation of travel speed even in case of operaing a dozer cylinder while making a construction machine travel by providing a flow dividing valve having selector valves in a traveling motor feed oil passage position of a hydraulic circuit of a construction machine provided with a dozer cylinder and in a flow dividing oil passage position to traveling motors and the dozer cylinder. SOLUTION: In case of performing dozer work, a switch is operated on in advance. When a hydraulic remote-controlled valve 49 for a dozer is operated at the time of a travel skate, a dozer selector valve 19' is put in switching operation, and a relatively small flow quantity of pressure oil led out of a dozer cylinder output port 62 of a flow dividing valve 44 flows out to a dozer cylinder 5' to actuate an earth discharge plate 26. In this case, since oil pressure is supplied to traveling motors 6L, 6R from traveling motor output ports 56L, 56R of the flow dividing valve 44, fluctuation of travel speed is not generated even with actuation/stop operation of the dozer cylinder 5' during the travel of a hydraulic shovel.

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