-
公开(公告)号：KR20180031042A
公开(公告)日：2018-03-27
申请号：KR20187006364
申请日：2016-11-01
Applicant: HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD
Inventor： SETAKI MASASHI , TANAKA TOMOYUKI , KAWAMOTO JUNYA
CPC classification number: E02F9/16
Abstract: 바닥판(18)의전측에는주행레버·페달(21)의각 레버부(24, 26)가삽입통과되는바닥판측개구부(17B)를마련한다. 플로어매트(19)에는바닥판측개구부(17B)와대응하는매트측개구부(19C)를마련한다. 매트측개구부(19C)에는매트측개구부(19C)를덮음과함께각 레버부(24, 26)의틸팅을가능하게하는슬릿(33A, 33B)을가지는평판부(33)와평판부(33)로부터연장되는통부(34)로이루어지는커버부재(32)를마련한다. 매트측개구부(19C)에는전체둘레립부(19D)를마련한다. 평판부(33)에는전체둘레립부(19D)와의사이를시일하는전체둘레단차부(35)를마련한다. 상판측개구부(17B)에는전체둘레계합돌출부(17C)를마련하고, 통부(34)에는전체둘레계합돌출부(17C)에계합하는전체둘레오목홈(36)을마련한다.
Abstract translation: 在底板18的前侧设置有供移动杆/踏板21的杆部24,26插通的底板侧开口部17B。 地垫（19）设置有与底板侧开口（17B）对应的垫子侧开口（19C）。 垫侧开口部19C设置有平板部33，该平板部33具有覆盖垫侧开口部19C并且能够使杆部24和26倾斜的狭缝33A和33B， 以及从盖部分32延伸的圆柱形部分34。 垫侧开口部19C具有整周的唇部19D。 平板部33设置有与整个周向唇部19D接触的整个周向台阶部35。 顶板侧开口部17B设置有整个周向接合突起17C，并且圆筒部34设置有接合到整个周向接合突起17C的总周向凹槽36。
-
公开(公告)号：KR20180039104A
公开(公告)日：2018-04-17
申请号：KR20187006482
申请日：2016-03-07
Applicant: HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD
Inventor： TABETA HIROSHI , KAWAMOTO JUNYA
IPC: B60K15/063 , E02F9/16 , G01F23/02
CPC classification number: B60K15/063 , E02F9/00 , E02F9/16 , G01F23/02
Abstract: 상부선회체(4)는선회프레임(6)과, 엔진(7)과, 연료탱크(11)와, 연료탱크(11)의상측을덮어설치된운전석대좌(16)와, 운전석대좌(16)에장착된운전석(18)과, 운전석(18)의주위를덮는캡(22)을구비하고있다. 연료탱크(11)는, 캡(22)의좌측면부(25)측에치우쳐선회프레임(6)과운전석대좌(16)의사이에배치한다. 연료탱크(11)의외면에는레벨게이지(29)가설치되어있다. 캡(22)의좌측면부(25)에는, 연료탱크(11)의급유구(11J)를둘러싸는급유용개구(27)와, 레벨게이지용개구(28)가설치되어있다.
-
公开(公告)号：KR20180031043A
公开(公告)日：2018-03-27
申请号：KR20187006472
申请日：2016-09-07
Applicant: HITACHI CONSTRUCTION MACHINERY TIERRA CO LTD
Inventor： IWAMOTO YOHEI , KAWAMOTO JUNYA , TABETA HIROSHI
Abstract: 카운터웨이트(7)와캡(15)의후면부(15B)의사이에는, 엔진커버(23)가상, 하방향으로개폐가능하게설치되고, 캡(15)의좌측면부(15C) 및우측면부(15D)의후측과선회프레임(6)의사이에는, 열교환장치커버(28)가설치되어있다. 열교환장치커버(28)는, 전, 후방향의전단(28C)이지지점이됨과함께후단(28D)이자유단으로되어선회프레임(6)에대하여전, 후방향으로회동가능하게된 가로열기구조로한다. 열교환장치커버(28)의후단측에는, 열교환장치커버(28)를닫은상태로보지하는열 교환장치커버용록 기구(32)가설치되고, 열교환장치커버(28)와엔진커버(23)가모두닫힌상태에서는, 열교환장치커버(28)의후단(28D)과열 교환장치커버용록 기구(32)가, 엔진커버(23)에의해후방으로부터덮이는구성으로한다.
Abstract translation: 配重（7）的后部（15B）医生wakaep 15，发动机罩23，虚拟的，并且可以安装打开和关闭方向，左侧表面部分（15C）和所述盖的右侧部分（15D）（15） 并且热交换器盖28安装在热交换器6的后侧和枢转框架6之间。 热交换器盖28是，如前所述，所述前端（28C）的方向后，与后端（28D）不会很快指向和是有级回转框架（6）的开口水平地可旋转地围绕，向后相对于所述结构 的。 用于将热交换器盖28保持在关闭状态的热交换器盖抵接机构32安装在热交换器盖28的后端侧上。热交换器盖28和发动机盖23关闭 热交换器盖28的后端28D和过热交换器盖延伸机构32从后面被发动机盖23覆盖。
-
公开(公告)号：DE69918803T2
公开(公告)日：2005-08-04
申请号：DE69918803
申请日：1999-12-02
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA , NAKATANI KENICHIRO , TAKAHASHI KIWAMU , HAMAMOTO SATOSHI , OKAZAKI YASUHARU , NAGAO YUKIAKI
Abstract: A hydraulic driving unit comprising a pump controller (18) controlling the discharge flow rate such that the pump discharge pressure is higher than the maximum load pressures in actuators(2-6) by a predetermined amount, and pressure compensation valves (12 - 16) having respective differential pressures between the discharge pressure of a hydraulic pump (1) and the maximum load pressures of the actuators (2-6) set to target compensation differential pressures, the pressure compensation valve (12) having a load-dependent characteristic that reduces the target compensation differential pressure when the load pressure increases, the pressure compensation valve (12) of the swing section being provided with a lower-limit setting spring (55) for preventing the target compensation differential pressure from lowering below a predetermined value. Thereby, the system is provided that permits acceleration without jerks at both the start for swing alone and the start for swing combination suppresses changes in the swing speed during transition from swing alone to combination, permits, at the start for swing combination, acceleration without extremely reducing the swing speed as compared with other actuators, and presents no problem, such as increases in cost and space or complicated circuit arrangement.
-
公开(公告)号：DE69727659T2
公开(公告)日：2004-10-07
申请号：DE69727659
申请日：1997-11-14
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA
Abstract: Differential pressures across flow control valves (6a, 6b, 6c) are controlled by pressure compensating valves (7a, 7b, 7c) to a differential pressure DELTA PLS having the same value, and the differential pressure DELTA PLS is maintained at a target differential pressure DELTA PLSref by a pump capacity control device (5). To modify the target differential pressure DELTA PLSref depending upon a change in revolution speed of an engine (1), a flow rate detecting valve (31) is provided on discharge passages (30a, 30b) in a fixed capacity hydraulic pump (30) so that a differential pressure DELTA Pp across a variable restriction (31a) in the flow rate detecting valve (31) is conducted to a setting modifying device (32) to modify the target differential pressure DELTA PLSref. The flow rate detecting valve (31) acts to change an opening area of the variable restriction (31a) depending upon the differential pressure DELTA Pp across the variable restriction (31a) itself, and to change the differential pressure DELTA Pp in accordance with the revolution speed of the engine (1). Accordingly, saturation phenomenon is improved in accordance with the engine revolution speed, and a favorable minute operability is obtained in the case where the engine revolution speed is set low.
-
Patent Agency Ranking
公开(公告)号：DE60101349D1
公开(公告)日：2004-01-15
申请号：DE60101349
申请日：2001-01-10
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA , HAMAMOTO SATOSHI , OKAZAKI YASUHARU , NAGAO YUKIAKI
Abstract: In a hydraulic drive system in which a target compensated differential pressure for each of pressure compensating valves 21a, 21b is set in accordance with a differential pressure between a pump delivery pressure and a maximum load pressure, and a target LS differential pressure is set as a variable value depending on a revolution speed of an engine 1, a fixed throttle 32 and a signal pressure variable relief valve 33 are disposed in a maximum load pressure line 35. A relief setting pressure PLMAX' of the signal pressure variable relief valve 33 is set so as to satisfy PLMAX' = PR - PGR + alpha (where alpha is a value smaller than PGR) with respect to a target LS differential pressure PGR and a setting pressure PR of the main relief valve 30. Even when a load pressure of any one actuator reaches the setting pressure of the main relief valve during the combined operation in which a plurality of actuators are simultaneously driven, pressure compensating valves are not closed, the other actuators are not sped up, and good operability in the combined operation can be ensured.
-
公开(公告)号：DE69727659D1
公开(公告)日：2004-03-25
申请号：DE69727659
申请日：1997-11-14
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA
Abstract: Differential pressures across flow control valves (6a, 6b, 6c) are controlled by pressure compensating valves (7a, 7b, 7c) to a differential pressure DELTA PLS having the same value, and the differential pressure DELTA PLS is maintained at a target differential pressure DELTA PLSref by a pump capacity control device (5). To modify the target differential pressure DELTA PLSref depending upon a change in revolution speed of an engine (1), a flow rate detecting valve (31) is provided on discharge passages (30a, 30b) in a fixed capacity hydraulic pump (30) so that a differential pressure DELTA Pp across a variable restriction (31a) in the flow rate detecting valve (31) is conducted to a setting modifying device (32) to modify the target differential pressure DELTA PLSref. The flow rate detecting valve (31) acts to change an opening area of the variable restriction (31a) depending upon the differential pressure DELTA Pp across the variable restriction (31a) itself, and to change the differential pressure DELTA Pp in accordance with the revolution speed of the engine (1). Accordingly, saturation phenomenon is improved in accordance with the engine revolution speed, and a favorable minute operability is obtained in the case where the engine revolution speed is set low.
-
公开(公告)号：DE69934483T2
公开(公告)日：2007-11-29
申请号：DE69934483
申请日：1999-12-27
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA , HAMAMOTO SATOSHI , OKAZAKI YASUHARU , NAGAO YUKIAKI
Abstract: A hydraulic drive device including a swing control system capable of accelerating it to a stationary state without any jerky swing operation at the time of starting of the swing operation, providing high energy efficiency, forming a stable swing system, and preventing a cost and space from increasing due to provision of additional circuits or complicated problem with circuit configuration from occurring, wherein a pump control device (18) is installed so as to control a discharge flow so that a pump discharge pressure becomes higher by a specified value than the max. load pressures of actuators (2 to 6), pressure compensating valves (12 to 16) are formed so that pressure differences between the discharge pressure of a hydraulic pump (1) and the max. load pressures of the actuators (2 to 6) are set as target compensating pressure differences, respectively, a load dependent characteristic which reduces the target compensating pressure differences when a load pressure rises is provided to the pressure compensating valve (12) of a swing section, and the load dependent characteristic is set so that a flow characteristic simulating the HP constant control of a swing motor can be obtained.
-
公开(公告)号：DE69727552T2
公开(公告)日：2004-12-16
申请号：DE69727552
申请日：1997-11-14
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA
Abstract: A differential pressure PLS between a discharge pressure of a hydraulic pump (2) and a maximum load pressure on a plurality of actuators (3a-3c) is maintained at a target differential pressure DELTA PLSref by a pump capacity control device (5). The target differential pressure DELTA PLSref is modified in accordance with the revolution speed of an engine (1) by conducting to an operation drive unit (32) a differential pressure DELTA Pp across a restriction (50) provided in a discharge passage of a fixed pump (30). An unloading valve (80) comprises first and second auxiliary control pressure chambers (80e, 80f), to which the differential pressure DELTA Pp across the restriction (50) is conducted, and a target differential pressure DELTA Pun for the unloading valve (80) is also modified according to the modification of the target differential pressure DELTA PLSref caused by the operation drive unit (32). Accordingly, a stable load sensing control can be performed without being affected by the engine revolution speed.
-
公开(公告)号：DE69727552D1
公开(公告)日：2004-03-18
申请号：DE69727552
申请日：1997-11-14
Applicant: HITACHI CONSTRUCTION MACHINERY
Inventor： TSURUGA YASUTAKA , KANAI TAKASHI , KAWAMOTO JUNYA
Abstract: A differential pressure PLS between a discharge pressure of a hydraulic pump (2) and a maximum load pressure on a plurality of actuators (3a-3c) is maintained at a target differential pressure DELTA PLSref by a pump capacity control device (5). The target differential pressure DELTA PLSref is modified in accordance with the revolution speed of an engine (1) by conducting to an operation drive unit (32) a differential pressure DELTA Pp across a restriction (50) provided in a discharge passage of a fixed pump (30). An unloading valve (80) comprises first and second auxiliary control pressure chambers (80e, 80f), to which the differential pressure DELTA Pp across the restriction (50) is conducted, and a target differential pressure DELTA Pun for the unloading valve (80) is also modified according to the modification of the target differential pressure DELTA PLSref caused by the operation drive unit (32). Accordingly, a stable load sensing control can be performed without being affected by the engine revolution speed.
-
-
-
-
-
-
-
-
-
Search Results
55
records
(took 0.026 seconds)
