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1. 发明专利

JP2001163268A EXTERIOR COVER DEVICE FOR APPARATUS EQUIPPED WITH ENGINE 失效
公开(公告)号：JP2001163268A
公开(公告)日：2001-06-19
申请号：JP34798799
申请日：1999-12-07
申请人： HITACHI CONSTRUCTION MACHINERY , HOKUETSU KOGYO CO
发明人： YAMAMOTO AKIHIKO , OTA MAKOTO , ABE YUKINARI
IPC分类号： B62D25/24 , B62D25/10 , E02F9/00
摘要： PROBLEM TO BE SOLVED: To simplify the structure of a stopper means and facilitate the opening and closing operation of an openable and closable cover. SOLUTION: A stopper device 19 comprises a support pin 20 provided on the fixing plate 4 of a hinge member 13; a stopper member 21 rotatably provided on the support pin 20 and having a pin guide groove 21B; an engagement pin 23 mounted on the movable plate 16 of the hinge member 13 and engaged with the pin guide groove 21B of the stopper member 21; a lock releasing operation part 24 provided on the stopper member 21; and the like. According to this, when a bonnet 17 is opened to a prescribed door opening position, the bonnet 17 can be locked by engaging the engagement pin 23 with the pin guide groove 21B. The stopper member 21 is rotated by the lock releasing operation part 24 to release the lock of the bonnet 17, whereby the bonnet 17 can be closed.

2. 发明专利

JP2000087388A CONSTRUCTION MACHINE 失效
公开(公告)号：JP2000087388A
公开(公告)日：2000-03-28
申请号：JP27434498
申请日：1998-09-10
申请人： HITACHI CONSTRUCTION MACHINERY , HOKUETSU KOGYO CO
发明人： YAMAMOTO AKIHIKO , OTA MAKOTO , KANAI TAKASHI , ABE YUKINARI
IPC分类号： E02F3/85 , E02F9/02
摘要： PROBLEM TO BE SOLVED: To prevent a malfunction of a blade cylinder when pressure oil is to be supplied to a span cylinder. SOLUTION: Main pipelines 31, 32 bifurcate to branch pipelines 31A, 3B and 32A, 32B, respectively, and a span cylinder 17 and a blade cylinder 20 are parallel-connected to the front ends of the pipelines 31A, 32A and front ends of the pipelines 31B, 32B, respectively. Either the span cylinder rod-side branch pipeline 31A or the blade cylinder bottom-side branch pipeline 31B is selectively connected to the upstream side main pipeline 31 by a selection valve 27. On the other hand the span cylinder bottom-side branch pipeline 32A and the blade cylinder rod-side branch pipeline 32B are always connected to the upstream main pipeline 32 via a junction 33. The blade cylinder rod-side branch pipeline 32B has a pilot-type check valve 34 arranged thereacross, which opens only when pressure oil is supplied to the blade cylinder 20.

3. 发明专利

JPH1082423A SLIDING BEARING 失效
公开(公告)号：JPH1082423A
公开(公告)日：1998-03-31
申请号：JP21549397
申请日：1997-07-28
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI , OTA MAKOTO , NAKATANI HIDEAKI , HATANO KAZUYOSHI , OGASAWARA MANABU
IPC分类号： F16C33/10
摘要： PROBLEM TO BE SOLVED: To slide a sliding bearing for a long period with no grease supply by impregnating lubricating oil having viscosity in a specified range into a bush made of porous iron sintering material. SOLUTION: When high viscosity lubricating oil having a viscosity with in 260 to 950cSt is impregnated in a porous bush 9 whose porosity is 5 to 30%, high viscosity lubricating oil 16 impregnated in a pore 14 of the porous bush 9 is appeared on the inner circumferential surface of the bush 9 so as to form a thin oil film 18. The oil film 18 becomes a sliding interface between the bush 9 and a bearing 10, and thereby, a lubricating effect is exhibited so as to obtain a good tribology characteristic. Since a fluidity of high viscosity lubricating oil impregnated in the pore 14 of the bush 9 is extremely low, it not flows out from the bush 9 even relative sliding motion of the bush 9 and the shaft 10 is repeated. As a result, feed of the lubricating oil film 18 is stably continued for a long period. It is thus possible to provide a no grease supply sliding bearing.

4. 发明专利

JPH08105444A SLIDE BEARING ASSEMBLY 失效
公开(公告)号：JPH08105444A
公开(公告)日：1996-04-23
申请号：JP25609594
申请日：1994-09-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： AKITA HIDEKI , OTA MAKOTO , NAKATANI HIDEAKI , HATANO KAZUYOSHI , OGASAWARA MANABU
IPC分类号： F16C33/10 , F16C33/12 , F16C33/74
摘要： PURPOSE: To perform the continuous use of a slide bearing assembly in a greaseless state even under high bearing pressure environment for a long period by impregnating a porous bush with high viscosity lubricating oil. CONSTITUTION: In a slide bearing assembly having a shaft 10 and a bush 9 and the bush 9 formed of a porous iron sintered material, the interior of the pore of the bush 9 is impregnated with lubricating oil having viscosity in a range of 240-1500cSt. It is preferable that after the shaft 10 is carburized, high- frequency-quenched, and nitrided, modifying treatment of a surface is applied through a formation and carburization treating method. The bush 9 is formed of a composite quenched alloy of copper powder and iron powder, having porosity of 5-30%. A pore forms a communication hole and it is preferable that surface modifying treatment is applied thereon by a carburization, nitriding, or nitrosulphurizing treatment method. This constitution performs greaseless slide under working environment, where a high bearing pressure of 6kgf/mm or more is exerted, for a long period of several years or more.

5. 发明专利

JPS63189599A ERECTOR DEVICE FOR SHIELDING MACHINE 失效
公开(公告)号：JPS63189599A
公开(公告)日：1988-08-05
申请号：JP2218987
申请日：1987-02-02
申请人： SHIMIZU CONSTRUCTION CO LTD , HITACHI CONSTRUCTION MACHINERY
发明人： YAMAMURO YASUO , ISAKA KAZUO , KIKUCHI KAZUO , TANAKA DAIZO , NISHIMURA SHINICHI , HONDA AKIHIRO , MORITA MICHIAKI , OTA MAKOTO , WATANABE AKIRA , TANAKA YASUO
IPC分类号： E21D11/40

6. 发明专利

JP2003147806A CONSTRUCTION MACHINE 审中-公开
公开(公告)号：JP2003147806A
公开(公告)日：2003-05-21
申请号：JP2001345122
申请日：2001-11-09
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： YAMAMOTO AKIHIKO , OTA MAKOTO , IRINO TERUO , HIRASAWA SHIGERU
IPC分类号： E02F9/18 , B66C23/74
摘要： PROBLEM TO BE SOLVED: To facilitate attaching and detaching working of a mobile weight by rotatably attaching the mobile weight to a fixed weight. SOLUTION: The mobile weights 15 and 16 are rotatably attached on the fixed weight 14 through a support pin 17. Thus, the mobile weights 15 and 16 can be firmly attached to the fixed weight 14 by the support pin 17, are previously prevented from slipping off, and reliability can be improved. In addition, since the support pin 17 is arranged in the inside of a counter weight 13, it can be hidden and the showing can be made attractive.

7. 发明专利

JP2002235340A CONSTRUCTION MACHINERY 失效
公开(公告)号：JP2002235340A
公开(公告)日：2002-08-23
申请号：JP2001034252
申请日：2001-02-09
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： HIRASAWA SHIGERU , IRINO TERUO , YAMAMOTO AKIHIKO , OTA MAKOTO
IPC分类号： E02F9/16 , B62D25/08 , B62D25/20 , B62D33/06
摘要： PROBLEM TO BE SOLVED: To provide a construction machinery capable of easily taking components in and out by removing the front cover of a seat stand without using any tool when large sized components are taken in and out from the inside of the seat stand. SOLUTION: A front cover supporting fitting 14 supporting the front cover 13 on a stand frame 12 in an openable manner is constituted of a projection 16 provided to the stand frame 12 and an engaging groove 18 engaged with the projection provided to the front cover 13, and the engaging groove 18 is so formed that the projection 16 can be pulled out from the engaging groove 18 when a switch 20 is further rotated with it as a fulcrum from a state to bring the front cover 13 into contact with the velocity change-over switch 20. Accordingly, the velocity change-over switch 20 can be used to remove the front cover 13 from the stand frame 12 at one touch without using a tool such as a wrench, a driver or the like.

8. 发明专利

JPH04260861A STEERING SHAFT BEARING SEALING DEVICE FOR CONSTRUCTION VEHICLE 失效
公开(公告)号：JPH04260861A
公开(公告)日：1992-09-16
申请号：JP4419291
申请日：1991-02-15
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： OTA MAKOTO
IPC分类号： B62D1/20
摘要： PURPOSE:To prolong the life of seal and reduce the accumulated quantity of dust and sediment by fitting a conical cover to a position right above the column of a shaft, in the non-contact state with other members but with its joined part to the shaft in the watertight state. CONSTITUTION:A conical cover 12 formed of metal or resin molding material is fitted to a shaft 5 to be joined together. A joined part 13 is formed to be watertight by means of close-fitting, closing/fixing a gap part with adhesive, or the like. The cover 12 larger in the outer diameter than a column 4 is fitted in the non-contact state with the column 4 and also with a dust seal 14 provided between the column 4 and the shaft 5. Dust A, rainwater, and the like fall or flow down along the upper inclined face of the cover 12, and the dust A falls further effectively since the cover 12 is rotated together with the shaft 5 by the operation of a steering wheel. As a result, the sliding contact part, with the shaft 5, of the lip 14a of the dust seal 14 is kept clean, and the life of seal can be prolonged.

9. 发明专利

JPS63197800A INNER FORMWORK OVERHAULING DEVICE IN METHOD OF NON-SEGMENT-SHIELD CONSTRUCTION 失效
公开(公告)号：JPS63197800A
公开(公告)日：1988-08-16
申请号：JP2938187
申请日：1987-02-10
申请人： SHIMIZU CONSTRUCTION CO LTD , HITACHI CONSTRUCTION MACHINERY
发明人： YAMAMURO YASUO , ISAKA KAZUO , KIKUCHI KAZUO , TANAKA DAIZO , NISHIMURA SHINICHI , HONDA AKIHIRO , MORITA MICHIAKI , OTA MAKOTO , WATANABE AKIRA , TANAKA YASUO
IPC分类号： E21D11/10

10. 发明专利

JPS63165692A SHIELD EXCAVATOR 失效
公开(公告)号：JPS63165692A
公开(公告)日：1988-07-08
申请号：JP30916086
申请日：1986-12-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： OTA MAKOTO , ABO TAKATOSHI , HIRASAWA YUKIHISA
IPC分类号： E21D9/06

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