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    • 2. 发明专利
    • Negative control type hydraulic system
    • 负控制型液压系统
    • JP2011137547A
    • 2011-07-14
    • JP2010292412
    • 2010-12-28
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • CHOENG HAE KYUN
    • F15B11/08F15B11/00
    • E02F9/2232E02F9/2285E02F9/2296F04B49/08F15B11/055F15B2211/20546F15B2211/3116F15B2211/625F15B2211/6355
    • PROBLEM TO BE SOLVED: To provide a negative control type hydraulic system eliminating the necessity of using a pilot pump, preventing power loss and eliminating the necessity of using a load pressure generator between a hydraulic pump and a control valve. SOLUTION: The negative control type hydraulic system includes: the hydraulic pump connected to an engine; a hydraulic actuator connected to the hydraulic pump; switching valves controlling a flow of working fluid supplied to the hydraulic actuator; pilot signal pressure generating means installed on a downstream side of a center bypass passage of the hydraulic pump; an operation lever outputting signal pressure in proportion to a manipulation amount; and a pressure reducing valve installed in a pilot flow passage having one end branched and connected to the center bypass passage and the other end connected to an input port of the operation lever, and controlling working fluid supplied through the pilot flow passage when the operation lever is manipulated so that the working fluid from the hydraulic pump can be used as the signal pressure according to the manipulation of the operation lever. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了提供一种负控制型液压系统,消除了使用先导泵的必要性,防止功率损耗并且消除了在液压泵和控制阀之间使用负载压力发生器的必要性。 解决方案:负控制型液压系统包括:液压泵连接到发动机; 连接到液压泵的液压致动器; 控制供给液压致动器的工作流体的流动的切换阀; 导向信号压力产生装置,安装在液压泵的中心旁路通道的下游侧; 操作杆,与操作量成比例地输出信号压力; 以及安装在先导流路中的减压阀,其一端分支连接到中心旁通通道,另一端连接到操作杆的输入端口,并且当操作杆操作时控制通过先导流路供给的工作流体 被操作,使得来自液压泵的工作流体可以用作根据操作杆的操纵的信号压力。 版权所有(C)2011,JPO&INPIT
    • 3. 发明专利
    • Hydraulic control valve
    • 液压控制阀
    • JP2011089639A
    • 2011-05-06
    • JP2010235128
    • 2010-10-20
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • KU BON SEUK
    • F15B11/00
    • F15B13/0402F15B13/024F15B2211/50527F15B2211/7058F15B2211/761F15B2211/853Y10T137/2574Y10T137/2622Y10T137/86614Y10T137/8671Y10T137/86879Y10T137/87169Y10T137/87193Y10T137/87225
    • PROBLEM TO BE SOLVED: To provide a hydraulic control valve preventing overload by relieving a hydraulic fluid in a return line in which the overload occurs due to the inertia force of a rotation body.
      SOLUTION: The hydraulic control valve includes a valve block 1 formed with first and second hydraulic passages and provided with a spool inside; first and second actuator passages 8, 9 connected to first and second actuator ports 6, 7 respectively; first and second passages 21, 23 with one ends branched and connected to the first actuator passage 8; a fourth passage 26 communicating with the other end of the first passage while one end is branched and connected to the second actuator passage 9; and a relief valve 10 relieving hydraulic fluid on the actuator port side where the overload has occurred when the overload has occurred to one of the first and second actuator ports 6, 7, and replenishing and supplying the relieved hydraulic fluid to the other actuator port where no overload has occurred.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供一种液压控制阀,通过在由于旋转体的惯性力而发生过载的返回管路中减轻液压流体来防止过载。 解决方案:液压控制阀包括形成有第一和第二液压通道并在其内设置有阀芯的阀块1; 分别连接到第一和第二致动器端口6,7的第一和第二致动器通道8,9; 第一通道21和第二通道23,其一端分支并连接到第一致动器通道8; 与第一通道的另一端连通的第四通道26,同时一端分支并连接到第二致动器通道9; 以及安全阀10,其在第一和第二致动器端口6,7中的一个上发生过载时在致动器端口侧的液压流体上释放过载,并且将释放的液压流体补充并提供给另一致动器端口, 没有发生过载。 版权所有(C)2011,JPO&INPIT
    • 4. 发明专利
    • Hydraulic system for construction machine having float function
    • 具有浮动功能的建筑机械液压系统
    • JP2011002092A
    • 2011-01-06
    • JP2010132568
    • 2010-06-10
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • KIM JIN WOOK
    • F15B11/08E02F3/43E02F9/22F15B11/02
    • E02F3/436E02F9/2203E02F9/2217E02F9/2282E02F9/2285E02F9/2292F15B2211/20576F15B2211/3058F15B2211/3116F15B2211/329F15B2211/7741
    • PROBLEM TO BE SOLVED: To perform a ground leveling operation while lowering a boom by the self-weight without using the hydraulic oil discharged from hydraulic pumps.SOLUTION: This hydraulic system for a construction machine includes the first and second hydraulic pumps 1, 2 and a pilot pump 3, an operation lever 8, a float function switch for selecting a float function, an arm cylinder, a swing device and a traveling device, boom cylinders 5, 5a, a bucket cylinder and a traveling device, a main control valve 4 for controlling the start and stop and the directional change of these devices, a solenoid valve 7 switched when the float function switch is turned on, a float valve 9 which is switched when the boom is lowered while the float function switch is turned on, allows the large chamber side flow passages of the boom cylinders 5, 5a to communicate with the small chamber side flow passages thereof, and returns the hydraulic oil to a hydraulic oil tank 24, and a logic poppet for holding which is installed in the float valve 9 and prevents the boom lowering abruptly.
    • 要解决的问题:在不使用从液压泵排出的液压油的情况下,通过自重降低动臂来执行地面平整操作。解决方案:该建筑机械的液压系统包括第一和第二液压泵1,2和 先导泵3,操作杆8,用于选择浮动功能的浮动功能开关,摇臂,摆动装置和行进装置,动臂缸5,5a,铲斗缸和行走装置,主控制阀 4,用于控制这些装置的启动和停止以及方向变化;当浮动功能开关接通时切换的电磁阀7;当浮子功能开关接通时在悬臂下降时切换的浮阀9; 允许动臂缸5,5a的大室侧流动通道与其小室侧流动通道连通,并将液压油返回到液压油箱24和用于固定的逻辑提升阀 g,其安装在浮阀9中,并且防止悬臂突然下降。
    • 6. 发明专利
    • Cab of small turning excavator
    • 小型挖掘机CAB
    • JP2010203123A
    • 2010-09-16
    • JP2009049006
    • 2009-03-03
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • KIM KANG TAE
    • E02F9/16B62D25/08
    • PROBLEM TO BE SOLVED: To provide a cab of a small turning excavator in which a handrail attached to the forward left-side pillar part is positioned within the turning radius of a construction machine, which prevents the front view of the driver from being obstructed by the handrail, and which has an easy access of the driver.
      SOLUTION: This cab 2 of the small turning excavator includes a door for opening and closing an entrance and a handrail 21 on the outside. The handrail 21 includes a lower handrail 21a which is affixed onto the outer lower side of the forward left-side pillar part 20 of the cab 2 and positioned within the turning radius of the construction machine, and an upper handrail 21b which extends asymmetrically with respect to the lower handrail so as to position within the turning radius of the construction machine and which is affixed onto the outer upper side of a pillar part.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种小型车削挖掘机的驾驶室,其中附接到左前侧柱部的扶手位于施工机械的转弯半径内,从而防止驾驶员的前视图 被扶手阻挡,并且驾驶员容易接近。 解决方案:小型车削挖掘机的驾驶室2包括用于打开和关闭入口的门和在外部的扶手21。 扶手21包括固定在驾驶室2的前左侧柱部20的外侧下部并位于施工机械的转弯半径内的下扶手21a,上扶手21b相对于 到下扶手,以便在施工机械的转弯半径内定位并固定在柱部分的外侧上侧。 版权所有(C)2010,JPO&INPIT
    • 7. 发明专利
    • Antitheft system of construction machinery
    • 建筑机械防盗系统
    • JP2010185273A
    • 2010-08-26
    • JP2010026205
    • 2010-02-09
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • LEE CHUN HAN
    • E02F9/24B60R25/04B60R25/23B60R25/31E02F9/20
    • B60R25/06Y10T70/5982
    • PROBLEM TO BE SOLVED: To prevent theft when an operator leaves an operator cab without closing a door while starting construction machinery, and to prevent an expected accident caused by a malfunction. SOLUTION: This antitheft system includes: a first step of reading information on operations of a function selection switch, a timer, a safety lever and an engine; a second step of determining whether the function selection switch is turned on or off; a third step of determining that the safety lever is switched to an off-state; a fourth step of determining which is longer, a timer input time or an arbitrary set time, and of proceeding to the second step when the timer-input time is shorter than the set time; a fifth step of determining whether the engine is started or not, when the operator switches the function selection switch to an on-state, the safety lever is switched to the off-state and the timer-input time is longer than the arbitrary set time; a sixth step of locking a driving portion by determining that the operator leaves the operator cab in the started state of the engine when determining that the engine is in a started state; a seventh step of determining the presence or absence whether the operator passes through a security device, when the driving portion is switched to a locked state; and an eighth step of unlocking the driving portion then. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了防止操作员离开驾驶室而在起动施工机械时不关门时防止盗窃,并且防止由故障引起的预期事故。 解决方案:该防盗系统包括:读取关于功能选择开关,定时器,安全杆和发动机的操作的信息的第一步骤; 确定功能选择开关是打开还是关闭的第二步骤; 确定安全杆被切换到关闭状态的第三步骤; 确定哪个更长的第四步骤,定时器输入时间或任意设定时间,以及当定时器输入时间比设定时间短时进行到第二步骤; 确定发动机是否启动的第五步骤,当操作者将功能选择开关切换到接通状态时,安全杆被切换到关闭状态,并且定时器输入时间比任意设定时间长 ; 当确定发动机处于启动状态时,通过确定操作者将驾驶室离开发动机的起动状态来锁定驾驶部分的第六步骤; 第七步骤,当驱动部分切换到锁定状态时,确定操作者是否通过安全装置的存在或不存在; 以及然后解锁驱动部分的第八步骤。 版权所有(C)2010,JPO&INPIT
    • 9. 发明专利
    • Hydraulic system for construction machine
    • 建筑机械液压系统
    • JP2010048417A
    • 2010-03-04
    • JP2009189831
    • 2009-08-19
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • IKEDA TOSHIMICHILEE YANG KOO
    • F15B11/17E02F9/22F15B11/02
    • E02F9/2239E02F9/2282E02F9/2292E02F9/2296F15B11/17F15B2211/20523F15B2211/20546F15B2211/20576F15B2211/2654F15B2211/2656F15B2211/3116F15B2211/324
    • PROBLEM TO BE SOLVED: To provide a hydraulic system for a construction machine, increasing the driving speed of a working apparatus by the hydraulic system of the construction machine such as an excavator and intercepting a hydraulic fluid from the working apparatus side to the traveling apparatus side during combined operation.
      SOLUTION: The hydraulic system for the construction machine includes: first and second variable displacement hydraulic pumps 50, 51; a first traveling control valve 54 provided in a center by-pass passage 52; first control valves 58, 59 controlling a turning motor 56 and an arm cylinder 57 respectively; a second traveling control valve 62 provided in a center by-pass passage 60; second control valves 66, 67 controlling a boom cylinder 64 and a bucket cylinder 65; and a variable displacement third hydraulic pump 69 connected to the center by-pass passage 60 through a branch passage 70 branched from a discharge passage 71 connected to a parallel line 63. When at least one of the first and second control valves 58, 59, 66, 67 is operated, the hydraulic fluid supplied from the third hydraulic pump 69 joins an actuator.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了提供一种用于施工机械的液压系统,通过诸如挖掘机的施工机械的液压系统来增加作业装置的驱动速度,并将液压流体从工作装置侧截取到 组合操作时的行驶装置侧。 解决方案:施工机械的液压系统包括:第一和第二可变排量液压泵50,51; 设置在中间旁通通道52​​中的第一行进控制阀54; 分别控制回转马达56和手臂缸57的第一控制阀58,59; 设置在中间旁通通道60中的第二行进控制阀62; 控制动臂油缸64和铲斗油缸65的第二控制阀66,67; 以及可变排量第三液压泵69,其通过分支通道70连接到中心旁通通道60,分支通道70从连接到平行线63的排出通道71分支。当第一和第二控制阀58,59中的至少一个 66,67运行时,从第三液压泵69供给的液压流体与致动器连接。 版权所有(C)2010,JPO&INPIT
    • 10. 发明专利
    • Hydraulic drive system for excavator
    • 挖掘机液压驱动系统
    • JP2010013927A
    • 2010-01-21
    • JP2009154248
    • 2009-06-29
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • IKEDA TOSHIMICHILEE YANG KOO
    • E02F9/22F15B11/02
    • E02F9/2239E02F9/2232E02F9/2282E02F9/2292E02F9/2296F15B11/17F15B2211/20576F15B2211/30525F15B2211/3116F15B2211/31588F15B2211/7135F15B2211/7142F15B2211/75
    • PROBLEM TO BE SOLVED: To attain independent swing control by hydraulic pressure provided through a third hydraulic pump and to maintain the speed of each actuator without insufficiency of an oil quantity during a swing composite operation through joining of the hydraulic pump for swing operation into a passage for a working apparatus.
      SOLUTION: This hydraulic drive system for an excavator has a first traveling control valve 302 and a first boom control valve 303 provided in sequence along a first center bypass line 20 from the downstream side of a first hydraulic pump 301, and a second traveling control valve 307 and a second boom control valve 308 provided in sequence along a second center bypass line 30 from the downstream side of a second hydraulic pump 306. The hydraulic drive system includes a confluence line 36 connected and installed between a third center bypass line 40 and a supply passage of the second boom control valve 308 so that pressure oil discharged from the third hydraulic pump 401 joins in a neutral position of a swing control valve 402 controlling the drive of a swing motor 403 according to a valve switching signal input from the outside.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:通过第三液压泵提供的液压获得独立的摆动控制,并且通过连接用于摆动操作的液压泵,在摆动复合操作期间保持每个致动器的速度,而不会使油量不足 进入工作设备的通道。 解决方案:该挖掘机的液压驱动系统具有从第一液压泵301的下游侧沿着第一中心旁通管路20依次设置的第一行驶控制阀302和第一起重臂控制阀303, 行驶控制阀307和第二起重臂控制阀308,其从第二液压泵306的下游沿着第二中心旁通管线30顺序设置。液压驱动系统包括汇合线36,其汇合并安装在第三中心旁路管线 40和第二起重臂控制阀308的供给通道,使得从第三液压泵401排出的压力油在控制回转马达403的驱动的回转控制阀402的中间位置连接,根据从第 外。 版权所有(C)2010,JPO&INPIT