专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPH05222744A HYDRAULIC CONTROLLER FOR ARTICULATED TYPE WORKING MACHINERY 失效
公开(公告)号：JPH05222744A
公开(公告)日：1993-08-31
申请号：JP2407792
申请日：1992-02-10
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO
IPC分类号： E02F3/32 , E02F3/43 , E02F9/22
摘要： PURPOSE:To make a hydraulic cylinder easily selectable even in the case where a combination of the hydraulic cylinder for automatic control over standard specifications and short arm specifications or the like is varied. CONSTITUTION:Each of first to third hydraulic cylinders 6, 7 and 8 driving each of first to third arms are driven by pressure oil out of a control valve 10 which is automatically operated by a controller 50, making these arms perform the specified motion. Either one of the hydraulic cylinders (for example, the hydraulic cylinder 7) is connected to this controller 10, and each of selector valves 41, 42 is set up in space between the remaining two hydraulic cylinders 6, 8 and the control valve 10. When these selector valves 41, 42 are selected to a position (a), the control valve 10 is connected to the hydraulic cylinder 8 on one side, and when they are selected to a second position (b), the control valve 10 is connected to the hydraulic cylinder 6 on the other. Accordingly, in the case where the hydraulic cylinder to be automatically controlled is varied in time of standard specifications and short reach specifications, etc., a changeover of the hydraulic cylinder is made easily possible only selecting these selector valves 41 and 42.

12. 发明专利

JPH04131425A PILING AND APPARATUS THEREFOR 失效
公开(公告)号：JPH04131425A
公开(公告)日：1992-05-06
申请号：JP25494590
申请日：1990-09-25
申请人： HITACHI CONSTRUCTION MACHINERY , CHOWA KOGYO KK
发明人： UCHINO TORU , SATO YUHEI , DATE KENICHIRO , MIYATA KENICHI , NAGABUCHI KAZUYUKI , SUZUKI YUKICHI
IPC分类号： E02D7/18 , E02D13/00
摘要： PURPOSE:To strike a longer pile than a regulated length of a base machine by providing a lateral grasping device at a vibro-hammer having a vibrator fitted in the base machine and a vertical chuck to hold piles. CONSTITUTION:The head of a short pile is held by a vertical chuck 5a of a vibro-hammer 5 and struck in a vertically hung condition. Next, a long pile is struck by the guide of the short pile. For insertion of the long piles, the long piles are held laterally by a lateral chuck 39 of a horizontally grasping apparatus 35 and the chucked part 36 of the horizontally grasping apparatus 35 is held by a vertical chuck and oscillated by a vibrator 5i. In this way, longer piles than a specified length in the regulation of the base machine or the like can be used and even when obstacles exist to restrict the upward movement of the front, piles can be struck by laterally holding the piles.

13. 发明专利

JPS63219789A ARM TYPE WORKING MACHINE 失效
公开(公告)号：JPS63219789A
公开(公告)日：1988-09-13
申请号：JP5147887
申请日：1987-03-06
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SATO YUHEI , MIYATA KENICHI , DATE KENICHIRO
IPC分类号： E21B15/00 , E21B7/00

14. 发明专利

JP2003238079A BRAKING DEVICE FOR WINCH, CLUTCH DEVICE, AND HOISTING WINCH FOR CRANE HAVING THEM 审中-公开
公开(公告)号：JP2003238079A
公开(公告)日：2003-08-27
申请号：JP2002356586
申请日：2002-12-09
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO , HOSHINO HIROYUKI , HONJO KOHEI
IPC分类号： B66D1/44 , B66D5/26
摘要： PROBLEM TO BE SOLVED: To acquire a prescribed braking characteristic regardless of the manufacturing tolerance of a spring, etc. SOLUTION: A rod 26 of a brake pedal 25 is connected with a spool spring of a reducing valve 23 through a bolt 30 and a press rod 29. The bolt 30 is screwed in the press rod 29, and the length L from the rod 26 to the press rod 29 changes when the press rod 29 is rotated. Thereby, the valve characteristic of the reducing valve 23 can be shifted, and the characteristics of a hydraulic pressure F2 acting on an oil room 16 can be changed as well. Therefore, a prescribed braking characteristic can be acquired even if the initial length of the belleville spring 15 is shifted. COPYRIGHT: (C)2003,JPO

15. 发明专利

JP2001171985A HYDRAULIC CIRCUIT OF WINCH 失效
公开(公告)号：JP2001171985A
公开(公告)日：2001-06-26
申请号：JP36162699
申请日：1999-12-20
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO
IPC分类号： B66D1/44 , B66D5/26 , F15B11/02
摘要： PROBLEM TO BE SOLVED: To eliminate the delay of the driving force transmission to a winding-up drum in a low cost structure, and to prevent the undesired lowering of a hanging load. SOLUTION: In this hydraulic circuit of winch, a control valve 13 provided between a hydraulic source 12 and a hydraulic motor 11 for winch driving; and a brake means 32 to give the brake to the hydraulic motor 11; are provided, the hydraulic motor 11 is driven by the discharge oil of the hydraulic source 12 by converting the control valve 13, as well as the brake by the brake means 32 is released following to the operation of an operation means 22a. In this hydraulic circuit, a pressure generating means 41 which is provided to a return pipe way 55 to lead the return oil from the control valve 13 in its neutral condition, and to generate the pressure to the return passage 55; and a replenishment oil passage 56 to replenish a part of the return oil to the winding-up side passage 51 of the hydraulic motor 11, by the pressure generated by the pressure generating means 41; are provided.

16. 发明专利

JP2000169081A DRIVE CONTROL DEVICE FOR DRAGLINE WORKING MACHINE 失效
公开(公告)号：JP2000169081A
公开(公告)日：2000-06-20
申请号：JP34595798
申请日：1998-12-04
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： NAKAYAMA AKIRA , OCHIAI MASAMI , IGARASHI TERUO , SAKAI TOSHIKI , DATE KENICHIRO , ISHIDA KAZUHISA , FUNATO KOJI , AZUMA SHINOBU
IPC分类号： B66C13/32
摘要： PROBLEM TO BE SOLVED: To keep proper a load working on a winch of a dragline working machine. SOLUTION: A click 11c is made to bite into the ground by winding up and driving a main winding drum 6a in accordance with winding-up manipulated variable of a main winding lever 16B and consequently by pulling a bucket 11 to the side of a working machine by winding up a drag rope 6b. Hereby, a control signal is output from a controller 20 to an electromagnetic proportional decompression valve 18 when a main winding load L main detected by pressure sensors 31B, 31D provided in the front and the back of a hydraulic motor 12B exceeds a load Lmax set by a load setter 34. Consequently, a hoist rope 5b is wound up and the bucket 11 rises, and biting of the bucket 11 is avoided.

17. 发明专利

JPH08169691A WINCH CONTROL CIRCUIT 失效
公开(公告)号：JPH08169691A
公开(公告)日：1996-07-02
申请号：JP31645394
申请日：1994-12-20
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO
IPC分类号： B66D1/44
摘要： PURPOSE: To establish a continuous speed control of a winch which uses two hydraulic pumps selectively and is incorporated in a construction machine such as a pile driving machine, wherein the speed control is made without interruptions from the super-slow speed range to normal speed range by continuing the two speed ranges of winch generated by two hydraulic pumps. CONSTITUTION: A winch control circuit includes a main pump 1 with variable capacity driven by a prime mover and an aux. pump 8 having a smaller capacity than the main 1. The discharged oil from either of the pumps 3, 8 is passed through solenoid valves 10a, 10b as a pump selecting means and fed selectively to a hydraulic motor 3 which drives the winch 11. Therein the speed when the discharge capacity of the aux. pump 8 is set maximumly and operation is made with the practical max. revolving speed of the prime mover is set higher than the minimum speed in the speed range in case the main pump 1 is used. The rope speed can the changed continuously from the minimum speed (super-slow speed) to the max. speed by adjustment of the revolving speed of the prime mover and operation of a pilot operation valve 5 and/or decelerator valves 13, 7.

18. 发明专利

JPH07187584A HYDRAULIC CONTROL DEVICE OF WINCH 失效
公开(公告)号：JPH07187584A
公开(公告)日：1995-07-25
申请号：JP33376893
申请日：1993-12-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO
IPC分类号： B66D1/44 , F15B11/00 , F15B11/05
摘要： PURPOSE:To surely synchronize main hoisting with auxiliary hoisting by intercepting a synchronizing circuit by an intercepting means with the operation of an operating means. CONSTITUTION:In the case of performing a synchronizing work for main hoisting with auxiliary hoisting, an intercepting means 21 is operated by the operation of an operating means 22. In the case where the respective directional control valves 6, 7 are switched to the stroke end in the same direction, return oil from a motor 8 flows as it is to a pump port of the downstream directional control valve 7. On the other hand, as the downstream circuit 33 is intercepted by the action of the intercepting means 21, oil quantity for shortage is kept from flowing from a hydraulic pump 1 through a meter-in pressure compensating valve 5 into the downstream directional control valve 7, and only return oil from the motor 8 is conducted to the downstream directional control valve 7. Accordingly, a main hoisting motor 8 and an auxiliary hoisting motor 9 are surely synchronously driven.

19. 发明专利

JPH06156988A ARM TYPE WORKING MACHINE 失效
公开(公告)号：JPH06156988A
公开(公告)日：1994-06-03
申请号：JP31898992
申请日：1992-11-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO
IPC分类号： B66C23/88 , B66D1/54
摘要： PURPOSE:To provide an arm type working machine which is reliably prevented from substantially lifting of a wire when the wire is brought into a vortex state. CONSTITUTION:An arm type working machine comprises a control valve 12 to control the operation direction of a hydraulic cylinder 3c for driving an extension arm and electromagnetic switching valves 25-27 located in the pilot line of a control valve 13 to control the operation direction of a hydraulic motor 11 for driving a winch. When a vortex detecting switch 30 detects the vortex state of a wire and is brought into an ON-state, the electromagnetic valves 25-27 are switched to a position B. Operation to switch the control valve 12 to two directions by means of a pilot valve 21 and operation to switch a control valve 13 to the lifting side (a position U) by means of a pilot valve 22 are prohibited. Operation to switch the control valve 13 to the delivery side (a position D) by means of the pilot valve 22 is kept in a practicable state to prevent the occurrence of a vortex state.

20. 发明专利

JPH0571940A LOCUS-MEASURING DEVICE 失效
公开(公告)号：JPH0571940A
公开(公告)日：1993-03-23
申请号：JP26519991
申请日：1991-09-17
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： DATE KENICHIRO
IPC分类号： B25J9/10 , B25J19/02 , B66F9/24 , E02F9/26 , G01B21/00
摘要： PURPOSE:To obtain a title item which is capable of an inexpensive and accurately measurement. CONSTITUTION:A first stroke meter 11 is provided at a first reference point within a movement surface of a point P to be measured and measured fluctuation of a length of a wire 11a which is expanded in reference to the point P to be measured. A second stroke meter 12 is provided at a second reference point within the movement surface of the point P to be measured and measures fluctuation of a length of a wire 12a which is expanded in reference to the point P to be measured. An operation device 14 obtains a distance between the first reference point and the point to be measured and that between the second reference point and the point to be measured according to an output value of the first and the second stroke meters 11 and 12 and then calculates a position of the point P to be measured within the movement surface according to these distances.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式