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公开(公告)号：US11591190B2
公开(公告)日：2023-02-28
申请号：US16095832
申请日：2017-04-20
申请人： Cargotec Patenter AB
发明人： Sten Sirén , Per Gustafsson , Lars Rydahl
IPC分类号： B66C23/90 , B66C13/20 , B66C13/44 , B66C13/46 , B66C23/68 , B66C23/70 , B66C23/00 , B66C23/42 , B66C23/78
摘要： A hydraulic crane comprising: —a rotatable column (7); —a crane boom system (10) comprising two or more liftable and lowerable crane booms (11, 13); and —an electronic control device (25), which is configured to prevent an execution of crane boom movements that would make the lifting moment of the crane exceed the maximum allowed lifting moment of the crane, and to continuously establish position information as to the prevailing position of the load suspension point (P) of the crane boom system. When the lifting moment of the crane has reached a limit value at a given level below the maximum allowed lifting moment, the electronic control device is configured to prevent the execution of any combination of crane boom movements that would increase the horizontal distance between the load suspension point and said vertical axis of rotation and at the same time allow the execution of any combination of crane boom movements that keeps said horizontal distance unchanged or reduces said horizontal distance.
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公开(公告)号：US20220055872A1
公开(公告)日：2022-02-24
申请号：US17434136
申请日：2020-02-21
IPC分类号： B66C13/20 , B66C23/00 , B66C23/86 , F15B15/20 , F15B11/05 , F15B11/042 , F15B11/044
摘要： A work vehicle includes: an operation tool that is operated by an operator; and a controller that determines a target flow rate for hydraulic oil fed to a hydraulic device on a basis of the amount of operation of the operation tool. The controller calculates a bleed-off target flow rate on a basis of the flow rate of hydraulic oil fed from a hydraulic oil pump and the target flow rate for hydraulic oil fed to the hydraulic device, calculates a bleed-off throttle differential pressure on a basis of a pressure of hydraulic oil fed from the hydraulic oil pump and a pressure of hydraulic oil in a hydraulic oil tank, calculates a bleed-off target opening area on a basis of the bleed-off target flow rate and the bleed-off throttle differential pressure, and controls a hydraulic oil control valve such that the bleed-off target opening area is achieved.
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公开(公告)号：US20210229962A1
公开(公告)日：2021-07-29
申请号：US17228005
申请日：2021-04-12
发明人： Zenghai Shan , Xiaodong Hu , Guowang Jiao , Bin Zhou , Conglin Yuan
摘要： A crane hydraulic system and a controlling method of the system is provided in order to fundamentally reduce impact in start and stop operations of a load sensing winch system. The load sensing subsystem is arranged, at the start and stop moments of a winch system, the pressure compensator can be opened, and the variable pump oil inlet line communicates with the oil return line to realize pressure relief, so as to reduce the pressure impact.
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公开(公告)号：US10989231B2
公开(公告)日：2021-04-27
申请号：US16272585
申请日：2019-02-11
申请人： HAWE HYDRAULIK SE
摘要： A hydraulic valve assembly includes a first spool valve and a first selector valve for actuating a first hydraulic consumer port or a second hydraulic consumer port, and a second spool valve and a second selector valve for actuating a third hydraulic consumer port or a fourth hydraulic consumer port. A shut-off valve is arranged in a common pressure channel. A branch channel with first and second pressure branch channels branches off the pressure channel upstream of the shut-off valve. The first selector valve connects the first pressure branch channel to a first connection line in a first switching position and connects the second pressure branch channel to a second connection line in a second switching position. The second selector valve, in a first switching position, connects the first connection line to the control channel and, in a second switching position, connects the second connection line to the control channel.
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公开(公告)号：US10974936B2
公开(公告)日：2021-04-13
申请号：US15754421
申请日：2016-08-16
摘要： A hydraulically actuated liftable and lowerable hook of a crane has a hydraulic system comprises at least one working machine with a hydraulic motor driving a winch. At least one drive machine comprising a pump is connected directly or indirectly to at least one of the working machines by means of two connections via corresponding working lines, which serve as a feed or return depending on the operating state of the working machine. A lowering brake valve is provided in one working line and is connected to the other working line via a control line such that the lowering brake valve is displaceable against a restoring force by pressure, which prevails in the other working line and is forwarded via the control line, from the blocking position of said valve into a through-flow position for lowering the hook by means of a primary winch.
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公开(公告)号：US20200377346A1
公开(公告)日：2020-12-03
申请号：US16954125
申请日：2018-12-18
申请人： TADANO LTD.
发明人： Naotaka MASUDA , Kenji URUSHIHARA , Takashi KAWANO
摘要： The present invention is provided with: a manipulation unit; a winch device that operates with an actuation mode of either a high speed mode or a low speed mode, and winds in or reels out a wire rope; a selection unit for an operator to select either the high speed mode or the low speed mode; a load calculation unit calculating a suspended load; a tension calculation unit calculating the tension of the wire rope; and a control unit controlling the actuation of the winch device. If the mode selected by the selection unit is the high speed mode, the manipulation unit is manipulated from a neutral state to a non-neutral state, and the suspended load is smaller than a load threshold and the tension is smaller than a tension threshold, the control unit controls the winch device so as to operate in the high speed mode.
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公开(公告)号：US20200340499A1
公开(公告)日：2020-10-29
申请号：US16082005
申请日：2017-03-16
摘要： A control device is disclosed for at least one hydraulic working section (A, B), which can be connected to a pressure supply source (P) and a return flow (T) via a hydraulic supply circuit and a control valve (34) supplied with a pilot pressure, the device comprising an emergency shutdown system (32) having a pilot solenoid valve (16) and an additional valve (14). Said control device is characterised in that both the hydraulic energy flow from the pressure supply source (P) to at least one of the respective working sections (A, B) and the pilot pressure supply to the control valve (34) can be suppressed by means of the pilot solenoid valve (16) via the additional valve (14).
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公开(公告)号：US10760660B2
公开(公告)日：2020-09-01
申请号：US15491537
申请日：2017-04-19
IPC分类号： F16H45/00 , B66C13/12 , F16D33/00 , B66C13/20 , F16D47/06 , B60K17/28 , E02F9/12 , F16C33/66 , F16D13/52 , F16D25/061 , B66C23/86 , F16D25/0638 , F16D31/00 , F16D13/54 , F16H47/00 , B66C23/00
摘要： The present invention relates to a hydraulic unit with a housing in which a hydraulic converter is accommodated, which is coupled with a drive shaft that includes a connecting shaft piece located outside the housing for connection to a mechanical drive element The invention furthermore relates to a hydraulic driving device with such hydraulic unit and to a drive train connecting piece to which the hydraulic unit is connected.It is proposed to integrate a clutch for connecting and disconnecting the hydraulic unit into the hydraulic unit itself, so that a mechanical drive train, to which the hydraulic unit is connected, can remain unchanged or need not especially be adapted to the clutch. In accordance with the invention, a clutch for coupling and uncoupling the connecting shaft piece of the hydraulic unit to and from the hydraulic converter of the hydraulic unit is accommodated in the housing of the hydraulic unit.
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公开(公告)号：US10745254B2
公开(公告)日：2020-08-18
申请号：US16153386
申请日：2018-10-05
发明人： Tadashi Miyazaki
IPC分类号： B66C23/86 , F15B11/044 , B66C13/20 , B66C23/00 , F15B11/10 , F15B13/042 , E02F9/12 , F15B11/00 , F16H61/4157
摘要： A working machine includes a lower body, a turning body, a turning manipulating member which turns the turning body, a hydraulic motor which rotationally drives the turning body, a brake device which brakes the hydraulic motor, a main hydraulic source which supplies hydraulic oil to the hydraulic motor, and a direction control valve which controls a flow direction of the hydraulic oil according to the manipulated variable of the turning manipulating member, in which in a state where the hydraulic motor is braked by the brake device based on a manipulation of a brake manipulating member, when the turning manipulation is performed by the turning manipulating member, a brake applied to the hydraulic motor by the brake device is released with respect to turning in an indication direction indicated by the turning manipulation such that the turning body turns in the indication direction.
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公开(公告)号：US20200207589A1
公开(公告)日：2020-07-02
申请号：US16633946
申请日：2018-06-08
摘要： A crane, in particular a mobile crane, having a closed hydraulic circuit in which a hydraulic pump is hydraulically connected to at least one hydraulic motor via a feed and a discharge, and in which the feed is hydraulically connected to the discharge via at least one bypass which bypasses the at least one hydraulic motor, wherein the at least one bypass includes a continuously adjustable valve for variably controlling the fluid flow bypassing the at least one hydraulic motor. In addition, a corresponding control device and a corresponding crane control program for actuating a closed hydraulic circuit of a crane are provided.
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