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31. 发明专利

JPH10331195A REVOLVING TYPE CONSTRUCTION MACHINE 失效
公开(公告)号：JPH10331195A
公开(公告)日：1998-12-15
申请号：JP16050497
申请日：1997-06-03
申请人： HITACHI CONSTRUCTION MACHINERY , HOKUETSU KOGYO CO
发明人： MINAMIYAMA EIJI , NISHIMURA KOJI , ENDO SHINICHIRO
IPC分类号： E02F9/00 , E02F9/16
摘要： PROBLEM TO BE SOLVED: To mount a supporting member on a revolving frame and support a roof cover with this supporting member. SOLUTION: A supporting member 15 is composed of a support 16, a left and a right leg 18 arranged as striding engine 7, and a center rear leg 19, and a canopy 22 is installed on the support 16. Accordingly it is possible to expose the engine 7, hydraulic pump 11, etc., between the left front leg, right front leg 18, and center rear leg 19, which enables easy execution of the tool inserting and component mounting/removing operations associate with the inspecting, adjusting, and repairing works of these component parts exposed. According to this configuration where the support 16 is supported by three legs 18, 19 the supporting member 15 can be simplified and the weight be reduced.

32. 发明专利

JPH09203078A SMALL SLEWING TYPE HYDRAULIC SHOVEL 失效
公开(公告)号：JPH09203078A
公开(公告)日：1997-08-05
申请号：JP1410596
申请日：1996-01-30
申请人： HITACHI CONSTRUCTION MACHINERY , HOKUETSU KOGYO CO
发明人： NISHIMURA KOJI , ASAKURA NOBUKATSU
IPC分类号： E02F9/10
摘要： PROBLEM TO BE SOLVED: To make it possible to be less subjected to restrictions under an influence of a bed of a truck by increasing a small slewing hydraulic shovel so that the maximum width of the upper part slewing body during a traveling posture may be larger than a traveling means and substantially identical to the width of a blade. SOLUTION: A small slewing hydraulic shovel is provided with a lower traveling body provided with a left crawler belt 4L and a right crawler belt 4R and a front member 3 which is turnably connected to an upper slewing body 2 loaded turnably on the upper part. The maximum width W1 of the upper slewing body 2 during a traveling posture is arranged to be substantially identical to the width W2 of a blade 5 where both W1 and W2 are arranged to be slightly larger than the maximum width W3 of the crawler belts 4L and 4R of the lower traveling body. Since the outside edge of a slewing mount frame 8 and a bonnet 20 is substantially arc-shaped, the maximum width W1 of the upper slewing body 2 is identical to a slewing diameter (d). This construction makes it possible to move forward the whole shovel based on the propriety of advancement of the blade and eliminate running-in work by one running in one direction.

33. 发明专利

JPH09165777A SWINGING HYDRAULIC BACKHOE 失效
公开(公告)号：JPH09165777A
公开(公告)日：1997-06-24
申请号：JP34836395
申请日：1995-12-18
申请人： HITACHI CONSTRUCTION MACHINERY , HOKUETSU KOGYO CO
发明人： IRINO TERUO , NISHIMURA KOJI , YAMADA KAZUNORI
IPC分类号： E02F9/00 , F16L3/10 , F16L3/22 , F16L3/223
摘要： PROBLEM TO BE SOLVED: To prevent the contact and friction of a hydraulic hose connected to a control valve under a driver's cab and a hydraulic cylinder by installing a bracket to a main body frame so as to cover the hydraulic cylinder for swing. SOLUTION: A vertical section is fixed onto the side face of the vertical plate 9 for reinforcement of a main body frame 2 by bolts 16 and a horizontal section is passed through the notched section 9a of the vertical plate 9 in a bracket 15 for supporting a hydraulic hose, and the bracket 15 is installed so that the upper section of a hydraulic cylinder 12 is covered with the horizontal section. The drooping of a hydraulic hose 8 is prevented by placing and supporting the hydraulic hose 8 connected to a control valve 7 onto the bracket 15, a space is formed to the lower section of the hydraulic hose 8, and the contact of the hydraulic hose 8 with the hydraulic cylinder 12 and the abrasion of the hydraulic hose 8 are obviated. The hydraulic hose 8 is held between a clamp 17 and the bracket 15 through a cushioning material 20 at that time. Accordingly, the hydraulic cylinder for swing can be mounted to the lower section of a driver's cab.

34. 发明专利

JPH07133620A HYDRAULIC DRIVING DEVICE FOR HYDRAULIC WORK MACHINE 失效
公开(公告)号：JPH07133620A
公开(公告)日：1995-05-23
申请号：JP28125893
申请日：1993-11-10
申请人： HITACHI CONSTRUCTION MACHINERY , HOKUETSU KOGYO CO
发明人： SAEKI FUMIMASA , SATO SHINICHI , NISHIMURA KOJI , TODA NOBORU
IPC分类号： E02F9/16 , E02F9/22
摘要： PURPOSE:To prevent the occurrence of engine stall by connecting an air conditioner to a hydraulic work machine driven by a small power engine via an electromagnetic drive type tilted angle control means and the like, and thereby making the input torque of each main pump low as the air conditioner is driven. CONSTITUTION:When the hydraulic work machine such as a minishovel and the like which are driven by a comparatively small output engine, is equipped with an air conditioner 13 and the like, an electromagnetic driving type tilted rotation control means 12 controlling the tilt angles of variable displacement hydraulic pumps 2 and 3, is provided. Besides, a switch 14 is provided, which interlocks the tilted angle control means 12 with the air conditioner 13. When the air conditioner 13 is operated with the switch 14 turned on, each tilt angle of the pumps 2 and 3 is decreased by the tilted angle control means 12, so that input torque will never exceed the output torque of an engine 1. In this case, when the air conditioner 13 is out of action, each tilt angle is made maximum, so that a hydraulic motor 6 and a hydraulic cylinder 7 which drive actuators, are driven with sufficient pressure oil. By this constitution, the occurrence of engine stall due to over load during works can thereby be prevented.

35. 发明专利

JP2003138600A CONSTRUCTION EQUIPMENT 审中-公开
公开(公告)号：JP2003138600A
公开(公告)日：2003-05-14
申请号：JP2001334484
申请日：2001-10-31
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SUGAYA MAKOTO , NISHIMURA KOJI , YAMADA KAZUNORI , MOTOZU MAKOTO , ISHIKAWA NAOHIRO , WATANABE OSAMU
IPC分类号： E02F9/00 , F04D29/60
摘要： PROBLEM TO BE SOLVED: To easily perform inspection work of a centrifugal fan and maintenance work to improve the workability. SOLUTION: A multiblade fan 16 is arranged above a radiator 20 and an oil cooler 21. Since the multiblade fan 16 is arranged at a position where a worker's hand reaches it easily in front of the worker, the inspection can be easily performed by visually inspecting an impeller 18 of the multiblade fan 16 and a driving motor 19, and the maintenance work such as cleaning work and the repair work required due to a failure can be efficiently performed by an easy attitude of the worker. Furthermore, since a cooling air duct 14 serves also as a rear face plate 13B of a hydraulic fluid tank 13 and partitions a cooling air passage 15, hydraulic fluid stored in the hydraulic fluid tank 13 can be cooled through the rear face plate 13B.

36. 发明专利

JP2002339403A TURNING FRAME OF CONSTRUCTION MACHINE 失效
公开(公告)号：JP2002339403A
公开(公告)日：2002-11-27
申请号：JP2001142076
申请日：2001-05-11
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： ISHIKAWA NAOHIRO , NISHIMURA KOJI , YAMADA KAZUNORI , SAKUMA NORIMITSU , MOTOZU MAKOTO , KIMURA SHOGO
IPC分类号： E02F9/08
摘要： PROBLEM TO BE SOLVED: To improve workability and durability at welding work by enhancing rigidity through simple welding work. SOLUTION: This turning frame 5 is provided with a blocking-up plate part 13 extending up to an upper surface of a frame base board 6 from a rear part of an upper plate part 12. A lower side part 13A of this blocking-up plate part 13 is welded to the frame base board 6. A left side part 13B and a right side part 13C are welded to a left longitudinal plate 8 and a right longitudinal plate 9 to form the front side of the turning frame 5 as a closed box structure. Thus, the turning frame 5 can enhance the rigidity to a shock. As a result, when welding the upper plate part 12 and the blocking-up plate part 13, sufficient strength can be obtained only by performing the welding work from the outside easy in work, and the workability of the welding work can be improved.

37. 发明专利

JP2002146838A CONSOLE DEVICE FOR CONSTRUCTION EQUIPMENT 失效
公开(公告)号：JP2002146838A
公开(公告)日：2002-05-22
申请号：JP2000339513
申请日：2000-11-07
申请人： HITACHI CONSTRUCTION MACHINERY , SHIGERU CO LTD
发明人： KIMURA SHOGO , NISHIMURA KOJI , MOTOZU MAKOTO , YAMADA KAZUNORI
IPC分类号： E02F9/16 , B66C13/56 , G05G1/00
摘要： PROBLEM TO BE SOLVED: To facilitate the attachment and detachment work of a cover in an inspection work or maintenance work to improve the workability. SOLUTION: A lower cover 19 is mounted on an internal frame 13 by a screw member 18 to be screwed from the lower side and a screw member 18 to be screwed from the rear side separately from an upper cover 17. Accordingly, when the inspection work or maintenance work of the pilot valve 21A of an operation lever 21 or the like is performed, each screw member 18 is loosened and removed, whereby only the lower cover 19 can be independently removed without removing the upper cover 17 or the like, and the inspection work or maintenance work can be easily performed. Since the screw members 18 fixing the lower cover 19 to the internal frame 13 are arranged in a position hardly seen from the outside, a good appearance can be provided.

38. 发明专利

JPH0988122A CONSTRUCTION MACHINE 失效
公开(公告)号：JPH0988122A
公开(公告)日：1997-03-31
申请号：JP27057295
申请日：1995-09-25
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： KOBORI SHINJI , NISHIMURA KOJI
IPC分类号： E02F9/00 , E02F9/24
摘要： PROBLEM TO BE SOLVED: To provide a portable type removable fuel tank and to surely prevent leakage of fuel from the fuel tank after removal thereof. SOLUTION: A fuel tank 31 which is mounted in a tank storage casing 22 so as to be removable from thereabove, is provided therein with a check valve which is opened when the fuel tank 31 is stored in the storage casing 22, so as to allow supply of fuel to the prime mover side, and is closed when the tank 31 is removed from the casing so as to prevent leakage of fuel from the tank 31. Accordingly, in the case of replenishment of fuel, the tank 31 is pulled upward from the casing 22 so as to easily replenish the tank with fuel. Further, during resting of a construction machine, the fuel tank 31 is removed, thereby it is possible to prevent the fuel tank 31 from being stolen.

39. 发明专利

JPH0978632A DEVICE FOR PREVENTING INTERFERENCE OF HYDRAULIC SHOVEL 失效
公开(公告)号：JPH0978632A
公开(公告)日：1997-03-25
申请号：JP23159095
申请日：1995-09-08
申请人： HITACHI CONSTRUCTION MACHINERY , NACHI FUJIKOSHI CORP
发明人： NASU KATSUYOSHI , NISHIMURA KOJI , YAMAGUCHI TAKESHI , YAMADA OSAMICHI , ISHIZAKA TOSHIYUKI , TATEWAKI SHINJI , MATSUDA TAKASHI
IPC分类号： E02F3/43 , E02F9/20 , E02F9/24
摘要： PROBLEM TO BE SOLVED: To perform a correction work rapidly with ease by increasing and decreasing a reference value of electric current signal to output it based on a correction value of current signal corresponding to a speed reduction region and stop region, thereby to control actions of a work machine. SOLUTION: A swing angle signal θ1 and a boom angle signal θ2 sensed by a swing angle sensor 12 and a boom angle sensor 13 are inputted into an operation device 11 incorporated into a controller. The device 11 computes, at an angle computing unit 14, angles of a reference position of a boom from the signal θ1 and the signal θ2. At a reference data storage unit 15, a data map for controlling the boom and a data map for controlling swinging are stored. At a comparison operation unit 16, it is judged whether boom angles computed at the unit 14 are within the data map stored in the unit 15 or not and current signals corresponding to the result of the judgment are outputted. And at a drive control unit 18, control signals are outputted to a hydraulic drive circuit 17 from the output values of the current signals from the unit 16.

40. 发明专利

JPH08218415A OPERATOR CAB INTERFERENCE PREVENTION DEVICE FOR HYDRAULIC SHOVEL AND HYDRAULIC SHOVEL 失效
公开(公告)号：JPH08218415A
公开(公告)日：1996-08-27
申请号：JP3051595
申请日：1995-02-20
申请人： HITACHI CONSTRUCTION MACHINERY , NACHI FUJIKOSHI CORP
发明人： YUGAMI MASAYUKI , NASU KATSUYOSHI , NISHIMURA KOJI , YAMADA OSAMICHI , MATSUDA TAKASHI , ISHIZAKA TOSHIYUKI
IPC分类号： E02F3/43 , E02F9/20 , E02F9/24
摘要： PURPOSE: To stop a bucket of a work machine more securely even when a solenoid valve for stop of a hydraulic system does not operate normally. CONSTITUTION: When a bucket 15 invades a stop indication position 42 set around an operator cab of a hydraulic shovel, an obstacle such as trash in hydraulic oil is caught in a spool of a solenoid valve for stop and the movement of the hydraulic shovel becomes dull even if a stop signal is output to the solenoid valve for stop from a controller. Therefore, an engine stop indication position 43 is set more on the operator cab side than the stop indication position 42 and the work is continued while abnormality condition is left as it is, and when the bucket 15 invades this position 43, an engine stop signal is output to a stop solenoid 17 for stopping an engine from the controller to stop the engine itself in emergency. Consequently, a pump which is a hydraulic oil source of each hydraulic actuator 22, 23, 24 stops simultaneously when the engine 16 stops and hydraulic oil does not flow into each hydraulic actuator 22, 23, 24 and stops so that interference between the bucket and operator cab is prevented securely.

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