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公开(公告)号：US20230182808A1
公开(公告)日：2023-06-15
申请号：US17923520
申请日：2020-05-06
发明人： Xiaodong HU , Tao ZHU , Jianchun YANG , Xiuzhi REN , Xiaojie DU
CPC分类号： B62D5/20 , B62D5/09 , B66C23/62 , B66C2700/0378
摘要： A hydraulic steering system, comprising a steering pump and a plurality of digital steering cylinder assemblies Each digital steering cylinder assembly includes a steering cylinder and a digital hydraulic valve configured to selectively communicate a rodless cavity of the steering cylinder with one of the steering pump and a return oil circuit, and communicate a rod cavity of the steering cylinder with the other of the steering pump and the return oil circuit.A controller can be configured to emit a digital pulse signal to a motorand cause the digital hydraulic valve to move towards a first working position or a second working position andA mechanical feedback structure can be configured to be driven by a piston rod of the steering cylinder when the valve core of the digital hydraulic valve moves towards the first working position or the second working position, so as to drive the digital hydraulic valve to return to a neutral position. The system can improve the control precision and the response speed of the steering system.
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公开(公告)号：US11015663B2
公开(公告)日：2021-05-25
申请号：US16447377
申请日：2019-06-20
发明人： Zenghai Shan , Lifeng Cao , Yanan Sun , Guangzhi Cao , Quansheng Huang , Qiang Song , Wenlong Yang
摘要： The present disclosure provides a lifting device comprising: a telescopic boom, comprising a basic section, at least one primary telescopic section and at least one secondary telescopic section; a telescopic control mechanism, comprising a primary telescopic drive mechanism that controls synchronous telescoping of the at least one primary telescopic section and a secondary telescopic drive mechanism that controls synchronous telescoping of the at least one secondary telescopic section; a torque limiter, comprising a first length sensor and a second length sensor, wherein a first sensor body and a telescopic end of a first length measuring cable of the first length sensor are respectively connected to tails of adjacent two section in the basic section and the at least one primary telescopic section; and a second sensor body and a telescopic end of a second length measuring cable of the second length sensor are respectively connected to tails of adjacent two section in the primary telescopic section adjacent to the at least one secondary telescopic section and the at least one secondary telescopic section. The lifting device of the present disclosure can reduce the length of the length measuring cable of a length sensor and thus reduce its volume and weight.
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公开(公告)号：US10988354B2
公开(公告)日：2021-04-27
申请号：US15828992
申请日：2017-12-01
发明人： Zenghai Shan , Ruixue Zhao , Zhican Chen , Shouwei Wang , Zhenge Zhang , Pinghai Zhang
摘要： The present disclosure discloses an operating method of a wind power jib of a crane and a crane, and relates to the field of engineering machinery. The method includes the following steps: rotatably connecting a main boom and a wind power jib; overturning the wind power jib to a first preset position by using a traction means of the crane; contacting a cushioning member with the wind power jib provided at the first preset position; further drawing the wind power jib to overturn to a second preset position; releasing the traction means, such that the wind power jib overturns automatically under the effect of self gravity and a cushioning member until the wind power jib is overturned in position.
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公开(公告)号：US20190329819A1
公开(公告)日：2019-10-31
申请号：US16473979
申请日：2016-12-27
发明人： Zenghai SHAN , Jiankai CHEN , Yunwang MA , Zongjia YU , Yufeng ZHAO , Liufu ZHAO , Pengcheng LU
摘要： The present application discloses a steering control system, a method and a crane. The steering control system includes: one or more first angle sensors, one or more second angle sensors, and a steering controller; each of the first angle sensors collects an actual steering angle of a wheel corresponding to a mechanical steering axle as a first steering angle; each of the second angle sensors an actual steering angle of a wheel corresponding to an electrically controlled steering axle as a second steering angle; the steering controller obtains a theoretical steering angle of the wheel corresponding to the electrically controlled steering axle in a corresponding travel mode according to the first steering angle, and compares the second steering angle with the theoretical steering angle, to control the wheel corresponding to the electrically controlled steering axle to steer according to a difference therebetween.
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公开(公告)号：US10359063B2
公开(公告)日：2019-07-23
申请号：US15528649
申请日：2015-01-19
发明人： Zenghai Shan , Zhengde Zhang , Xiaodong Hu , Haiyan Zhang , Conglin Yuan
摘要： A method and a system for recovering and utilizing crane operating energy and a crane includes converting by a first hydraulic power means hydraulic energy generated by a hydraulic actuator into mechanical energy of a transmission shaft; driving, by the transmission shaft, a second hydraulic power means to rotate so as to convert the mechanical energy of the transmission shaft into mechanical energy of the second hydraulic power means; filling, by the second hydraulic power means, pressurized oil into an accumulator so as to convert the mechanical energy of the second hydraulic power means into hydraulic energy for storage.
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公开(公告)号：US10233060B2
公开(公告)日：2019-03-19
申请号：US15555407
申请日：2016-03-03
发明人： Zenghai Shan , Shouwei Wang , Yinmei Ren , Lei Zhao , Houbao Qi , Dong Wang
IPC分类号： B66D1/08 , F16K31/124 , F16K31/06 , F16K27/00 , F15B1/16 , F15B13/04 , F15B13/02 , F15B13/08 , B66D1/44 , B66F9/22
摘要： The present application relates to a switching valve, a switching hydraulic system, and a crane, in which the switching valve having an oil inlet and an oil outlet comprises at least two pairs of valve oil ports, a pair of cartridge valves provided between each pair of valve oil ports, and the oil inlet and the oil outlet are controlled such that the oil inlet and the oil outlet are capable of shifting between communications with the at least two pairs of valve oil ports. The switching valve switches on and off communication between the oil inlet and the oil outlet and the at least two pairs of valve oil ports by controlling opening or closing of the cartridge valves.
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公开(公告)号：US10196245B2
公开(公告)日：2019-02-05
申请号：US15186403
申请日：2016-06-17
发明人： Junfei Chai , Huapeng Cui , Hongmin Zhang , Lei Li , Cuiping Wang
摘要： An apparatus for a crane comprises a large-cavity pressure sensor, a small-cavity pressure sensor, a controller, a telescopic oil cylinder, and a telescopic oil cylinder regulator. The large-cavity pressure sensor can measure the oil pressure in a large cavity of the telescopic oil cylinder. The small cavity pressure sensor can measure the oil pressure in a small cavity of the telescopic oil cylinder. The controller can control an output electrical signal according to a large-cavity oil pressure fed back by the large-cavity pressure sensor and a small-cavity oil pressure fed back by the small-cavity pressure sensor, and, by means of the electrical signal, control a change of the amount of hydraulic oil flowing into and out of the large cavity and the small cavity of the telescopic oil cylinder so as to regulate the oil pressures in the large cavity and the small cavity.
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公开(公告)号：US10144620B2
公开(公告)日：2018-12-04
申请号：US15507931
申请日：2014-09-05
发明人： Zenghai Shan , Changjian Zhu , Zhongxiang Zhao , Quan Li , Maofeng Zhu
摘要： The present disclosure discloses a method and system for positioning an engineering machinery work object. The method comprises: a reference station collects in real time satellite positioning information as a reference station current measurement value D0, and transmits D0 to first and second mobile stations; the first mobile station and the second mobile station respectively collect in real time satellite positioning information as a first mobile station current measurement value D1 and a second mobile station current measurement value D2, and respectively perform dynamic differential processes on D0 and D1 and D0 and D2 to obtain relative coordinate information of the first mobile station and the second mobile station; a crane resolving unit determines the boom extension length, the boom pitch angle and boom rotating angle based on the relative coordinate information of the first mobile station and the second mobile station; based on the boom extension length, the boom pitch angle and the boom rotating angle, a crane controller controls the boom to move to a hoisting position of the object to hoist the object. The present disclosure can greatly increase the precision of positioning the work object, and can also automatically track the boom to avoid errors and risks resulting from visual adjustment.
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公开(公告)号：US20170283223A1
公开(公告)日：2017-10-05
申请号：US15507931
申请日：2014-09-05
发明人： Zenghai Shan , Changjian ZHU , Zhongxiang ZHAO , Quan Li , Maofeng Zhu
摘要： The present disclosure discloses a method and system for positioning an engineering machinery work object. The method comprises: a reference station collects in real time satellite positioning information as a reference station current measurement value D0, and transmits D0 to first and second mobile stations; the first mobile station and the second mobile station respectively collect in real time satellite positioning information as a first mobile station current measurement value D1 and a second mobile station current measurement value D2, and respectively perform dynamic differential processes on D0 and D1 and D0 and D2 to obtain relative coordinate information of the first mobile station and the second mobile station; a crane resolving unit determines the boom extension length, the boom pitch angle and boom rotating angle based on the relative coordinate information of the first mobile station and the second mobile station; based on the boom extension length, the boom pitch angle and the boom rotating angle, a crane controller controls the boom to move to a hoisting position of the object to hoist the object. The present disclosure can greatly increase the precision of positioning the work object, and can also automatically track the boom to avoid errors and risks resulting from visual adjustment.
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公开(公告)号：US11603294B2
公开(公告)日：2023-03-14
申请号：US16474476
申请日：2016-12-27
发明人： Zenghai Shan , Changjian Zhu , Lijing Li , Junfei Chai , Lei Li
摘要： Provided are a method and a system for controlling operation of a crane, and a crane. The method includes: scanning dynamically, by a 3D imaging device, a plurality of objects within an operating range of the crane to obtain 3D spatial information of each of the plurality of objects, wherein the plurality of objects includes the crane and an obstacle, the 3D spatial information includes 3D spatial coordinates; determining a distance from the obstacle to a preset position of the crane based on the 3D spatial coordinates of the crane and the obstacle; judging whether the distance from the obstacle to the preset position is less than a preset distance corresponding to the preset position; and performing an alarm if the distance from the obstacle to the preset position is less than the preset distance corresponding to the preset position.
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