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1. 发明专利

IN173279B Hydraulic drive traveling system 未知
公开(公告)号：IN173279B
公开(公告)日：1994-03-26
申请号：IN275CA1990
申请日：1990-04-03
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA HIDEAKI , HIRATA TOICHI , SUGIYAMA GENROKU , KAGIWADA HITOSHI , YASUOKA TOMOHIKO , WATANABE HIROSHI , IZUMI EIKI , ONOUE HIROSHI
IPC分类号： F15B15/18

2. 发明专利

IN176623B Hydraulic motor drive circuit system for example in a hydraulic excavator 未知
公开(公告)号：IN176623B
公开(公告)日：1996-08-10
申请号：IN198CA1991
申请日：1991-03-05
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： KAGIWADA HITOSHI , YASUOKA TOMOHIKO
IPC分类号： F15C1/00

3. 发明公开

EP1106833A4 VOLUME CONTROL VALVE OF VARIABLE DISPLACEMENT HYDRAULIC ROTATING MACHINE 有权
标题翻译：带可变冲程活塞发动机的油量控制阀
公开(公告)号：EP1106833A4
公开(公告)日：2011-03-16
申请号：EP00927846
申请日：2000-05-23
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： NIIDOME TAKASHI , KAGIWADA HITOSHI , KOBAYASHI TAKESHI
IPC分类号： F04B49/00 , F03C1/10 , F04B49/08 , F15B13/04 , F16K3/26 , F16K11/07 , F16K17/30 , F16K31/383
CPC分类号： F15B13/0403 , F04B49/002 , F04B49/08 , F04B2205/16 , F04B2205/18 , F16H61/4148 , F16H61/423

4. 发明公开

EP0866223A4 SWASH PLATE TYPE HYDRAULIC ROTATING MACHINE AND METHOD OF MANUFACTURING CASING FOR SAME 失效
标题翻译： HYDRAULISCHE ROTATIONSMASCHINE DERSCHRÄGSCHEIBENBAUARTSOWIE VERFAHREN ZUR HERSTELLUNG DESGEHAÜSES
公开(公告)号：EP0866223A4
公开(公告)日：2000-11-08
申请号：EP97942274
申请日：1997-10-07
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： SATO HITOSHI , KAGIWADA HITOSHI , KIMURA KENICHI
IPC分类号： F01B3/00 , F03C1/06 , F04B1/14 , F04B1/20
CPC分类号： F03C1/0631 , F04B1/146 , F04B1/2014 , Y10T29/49158 , Y10T29/49229 , Y10T29/49988 , Y10T29/49989
摘要： When molding a casting (77) which is a material for a casing body (62), metallic pipes (76) are integrally cast which are to make oil passages (64) for inclinedly rotating actuators (14) for a swash plate (12). The metallic pipes (76) are positioned in a mold (71) for casting the casing body (62), and a molten metallic material for casting is poured to mold the casting (77). Inner and outer peripheral surfaces of the casting (77) and the metallic pipes (76) are subjected to finish processing to manufacture the casing body (62) for a hydraulic motor (61). Thus pipings (63) of the metallic pipe can be embedded in the casing body (62) to extend from an opening end of a cylindrical section (62A) to cylinder sections (15) for the inclinedly rotating actuators (14) provided on a bottom section (62B), and inner peripheral portions of the pipings (63) can be formed to serve as the oil passages (64), through which an oil is supplied and discharged for control of inclined rotation.
摘要翻译：当模制作为壳体（62）的材料的铸件（77）时，金属管（76）被整体铸造，以形成用于倾斜旋转的旋转斜盘（12）的致动器（14）的油通道（64）。金属管（76）位于用于铸造壳体（62）的模具（71）中，并且浇注用于铸造的熔融金属材料以铸造铸件（77）。对铸件（77）和金属管（76）的内外表面进行精加工以制造用于液压马达（61）的壳体（62）。因此，金属管的管道（63）可以嵌入壳体（62）中，以从圆柱形部分（62A）的开口端延伸到用于设置在底部上的倾斜旋转致动器（14）的气缸部分（15）（62B）和管道（63）的内周部分可以形成为用于供油和排出以控制倾斜旋转的油通道（64）。

5. 发明专利

JP2002206504A HYDRAULIC MOTOR DRIVING DEVICE 失效
公开(公告)号：JP2002206504A
公开(公告)日：2002-07-26
申请号：JP2001002596
申请日：2001-01-10
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： KOBAYASHI TAKESHI , KAGIWADA HITOSHI , NIITOME TAKASHI , YOKOYAMA KAZURO
IPC分类号： E02F9/22 , F15B11/00 , F15B11/08
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic motor driving device capable of preventing quick generation of brake pressure and generation of high surge pressure to a hydraulic motor, and reducing the number of parts. SOLUTION: This device is provided with main conduits 4A and 4B for linking a hydraulic pump 2 with the hydraulic motor 1, a direction changing valve 5 to control the hydraulic motor 1, and a relief valve 7 to form the brake valve for braking the hydraulic motor 1. A counter balance valve 6 which also acts as a high pressure selecting valve is provided between the direction changing valve 5 and the hydraulic motor 1. The relief valve 7 includes a main valve 9, pressure receiving parts 8A and 8B, a pressure setting spring 9 to set a valve opening pressure value, a pressure setting spring chamber 12, a pressure increasing piston 10, and a pressure increasing spring 11. It is also provided with a signal passage 14 for introducing low pressure to the pressure setting spring chamber 12 when the direction changing valve 5 is neutral, and introducing high pressure selected by the high pressure selecting valve included in the counter balance valve 6 to the pressure setting spring chamber 12 when the direction changing valve 5 is changed from a neutral position, and a restrictor 15 provided in the signal passage 14.

6. 发明专利

JP2000352401A CAPACITY CONTROL DEVICE FOR VARIABLE DISPLACEMENT HYDRAULIC MOTOR 失效
公开(公告)号：JP2000352401A
公开(公告)日：2000-12-19
申请号：JP16448599
申请日：1999-06-10
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： NIITOME TAKASHI , KAGIWADA HITOSHI , KOBAYASHI TAKESHI
IPC分类号： E02F9/22 , F15B11/02
摘要： PROBLEM TO BE SOLVED: To enhance flexibility by stabilizing motor capacity to automatically control, reducing load of an operator at stopping operation or the like, and extending an application range. SOLUTION: In this control device, a center bypass port 8A is disposed to a pressure control valve 8 of a counter balance valve 6, and load pressure in a hydraulic motor 3 is supplied by the center bypass port 8A from pipe line parts 4A1 and 4B1 through a pilot line 27 to a pilot port 15B of a capacity control valve 11. A shuttle valve 9 is provided between pipe line parts 4A2 and 4B2 disposed between the hydraulic motor 3 and the counter balance valve 6, and pressure oil at a high pressure side selected by the shuttle valve 9 is supplied via a high pressure pipe line 28 and the capacity control valve 11 to a servo actuator 10, thereby changing a pressurized area to a pilot pressure of the capacity control valve 11 by a large capacity position (a) and a small capacity position (b).

7. 发明专利

JP2000009017A VARIABLE DISPLACEMENT SWASH PLATE TYPE HYDRAULIC MOTOR 失效
公开(公告)号：JP2000009017A
公开(公告)日：2000-01-11
申请号：JP19109398
申请日：1998-06-22
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： NIITOME TAKASHI , KOBAYASHI TAKESHI , KAGIWADA HITOSHI
IPC分类号： F03C1/253 , F04C15/00
摘要： PROBLEM TO BE SOLVED: To reduce whole size and gross weight by suppressing an outer diameter of a casing on which a hydraulic pressure passage is formed, even when a decelerator or the like is attached to the casing. SOLUTION: Spline grooves 3 are formed on an inner peripheral side of a cylindrical part 1A of a casing 1 along a circumferential direction with equal spacings. An outer peripheral side of a fixed brake plate 20 composing a part of a brake device 19 is fitted to the spline grooves 3. A hydraulic pressure passage 16 is formed on the casing 1 for supplying and discharging pressure oil in respect to a tilting control actuator for tilting a swash plate. The hydraulic pressure passage 16 is arranged on the side of a projection 1A1 between the spline grooves 3.

8. 发明专利

JPH11230021A VARIABLE CAPACITY SWASH PLATE-TYPE HYDRAULIC MOTOR 失效
公开(公告)号：JPH11230021A
公开(公告)日：1999-08-24
申请号：JP4906198
申请日：1998-02-13
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： KAGIWADA HITOSHI , KOBAYASHI TAKESHI , NIITOME TAKASHI
IPC分类号： F03C1/253
摘要： PROBLEM TO BE SOLVED: To miniaturize the whole motor and to reduce the weight by reducing the outside diameter of a casing in which an oil pressure passage is formed, even if a decelerator is attached to the casing. SOLUTION: An oil pressure passage 49 for supplying and discharging pressure oil from the outside into a cylinder part 18 of a tilting and rotating actuator 17 is provided in a casing 42. This oil pressure passage 49 is constituted of three passages of an axial passage part 49A, an inclined passage part 49B and a radial passage part 49C. In the axial passage part 49A of the oil pressure passage 49, the base end side is opened on a supporting surface of a brake attaching stage part 47, and the tip side is so formed as to extend to the position near the cylinder part 18. The base end side opening of the axial passage part 49A is sealed by a plug 50.

9. 发明专利

JPH07310644A HYDRAULIC ROTATING MACHINE WITH BRAKE DEVICE 失效
公开(公告)号：JPH07310644A
公开(公告)日：1995-11-28
申请号：JP12686594
申请日：1994-05-17
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： YASUOKA TOMOHIKO , KAGIWADA HITOSHI
IPC分类号： F03C1/00 , F16D55/40
摘要： PURPOSE:To facilitate engagement between a drive disc formed on a rotary shaft and a moving brake disc. CONSTITUTION:Seven engaging recessed parts 31B to which a piston is coupled are formed in a drive disc 31 and an arcuate recessed groove part 32 is formed therebetween in an outer peripheral surface 31C through notching. Meanwhile, engaging protrusions 36 engaged with the respective recessed grooves 32 are formed in the inner peripheral surface of a moving brake disc 35. Since the recessed groove part 32 is situated in a position most away spaced from the mating engaging groove part 31B, i.e., a thick section position, the damage of the outer peripheral surface 31C by the influence, such as a hydraulic reaction force, by a piston is prevented from occurring. This constitution provides an increased life for a hydraulic motor and facilitates manufacture of a drive disc 31.

10. 发明专利

JPH06173905A HYDRAULIC MOTOR DRIVING CIRCUIT 失效
公开(公告)号：JPH06173905A
公开(公告)日：1994-06-21
申请号：JP35265592
申请日：1992-12-10
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： KAGIWADA HITOSHI , YASUOKA TOMOHIKO
IPC分类号： E02F9/22 , F15B11/00 , F15B11/08
摘要： PURPOSE:To discharge the pressure oil from a brake device to a tank at an early stage and effectively apply a brake to a hydraulic motor with the brake device when the hydraulic motor is stopped and discharge only a small quantity of the pressure oil to the tank within the pressure oil fed from a brake line to the brake device side during the stationary rotation of the hydraulic motor. CONSTITUTION:When a direction selector valve 5 is switched from the neutral position A to selection positions B, C for the stationary rotation of a hydraulic motor 1, the pressure oil fed from a brake line 12 to the brake chamber 7B of a brake device 7 via the spool 39 of a throttled pressure reducing valve 34 rises to the preset pressure of a valve spring 42, the spool 39 of the throttled pressure reducing valve 34 is switched from the communication position (a) to the throttle position (b) or the cutoff position (c) against the valve spring 42, and a throttle passage 41 is closed by the spool 39. When the direction selector valve 5 is returned to the neutral position B to stop the hydraulic motor 1, the spool 39 is returned to the communication position (a), and throttle passages 39F, 41 are communicated with a drain line 36.

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