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公开(公告)号：US12012161B2
公开(公告)日：2024-06-18
申请号：US17957342
申请日：2022-09-30
发明人： Abdul Karim Rahimzai
摘要： A hydraulic steering arrangement (1) including a supply port (2), a return port (4), a working port arrangement having two working ports (5, 6), a main flow path (7) between the supply port (2) and one of the working ports (5) and a return flow path (8) between the other working port (6) and the return port (4), wherein the main flow path (7) includes a main orifice (A1), a flow meter (9), a first flow meter orifice (A2) upstream the flow meter (9), a second flow meter orifice (A3) downstream the flow meter (9), and a first working port orifice (A4), the return flow path (8) includes a second working port orifice (A5), a load sensing point (17) is arranged between the main orifice (A1) and the first flow meter orifice (A2), a drain orifice (Ad) is arranged between the load sensing point (17) and the return port (4), and a priority valve arrangement (10) is arranged between the supply port (2) and the main orifice (A1). Such a steering arrangement should enable a high steering speed without loss of comfort. To this end a load sensing port (16) of the priority valve arrangement (10) is connected to the load sensing point (17), characterized in that a priority outlet (CF) of the priority valve arrangement (10) is directly connected to the main orifice (A1), the load sensing port (16) of the priority valve arrangement (10) is directly connected to the load sensing point (17) and the main flow path (7) includes a check valve (24) between the load sensing point (17) and the working port (5) of the main flow path (7), the check valve (24) opening in a direction towards the working port (5).
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公开(公告)号：US20220161845A1
公开(公告)日：2022-05-26
申请号：US17600109
申请日：2019-12-18
发明人： JUERGEN KELLER
摘要： A steering method for an industrial truck. The industrial truck includes a pivot plate which is mounted to be rotatable about a steering axis in two steering directions, three wheels, one of the three wheels being designed as a central wheel which is rotatably mounted about an axis of rotation in the pivot plate, and a hydraulic cylinder which rotates the pivot plate about the steering axis. The method includes exerting steering forces of at least approximately equal magnitude on the pivot plate to provide a rotation about the steering axis in each of the two steering directions.
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公开(公告)号：US20170297617A1
公开(公告)日：2017-10-19
申请号：US15381213
申请日：2016-12-16
发明人： Morten Hoeck Petersen , Thomas Træger Hansen , Thomas Bauer , Niels Bjarne Hansen , Jeroen Hinse
摘要： Hydraulic steering (1) is disclosed comprising a high pressure port (P), a low pressure port (T), two working ports (CL, CR), a manual steering section (3), and a steering valve section having a steering valve 5 and a hydraulic driving arrangement (6) adjusting hydraulically a position of said steering valve. A change from automatic steering to manual steering should be reliably ensured when the manual steering section is directly influenced by a driver. To this end, a switching valve (11) is provided, which is actuatable between a first position in which said driving arrangement (6) is supplied with hydraulic fluid under pressure, and a second position in which a supply of hydraulic fluid to said driving arrangement (6) is interrupted, wherein said switching valve (11) is hydraulically actuated into said second position by a pressure generated upon actuating of said manual steering section (3).
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公开(公告)号：US09725113B2
公开(公告)日：2017-08-08
申请号：US15147516
申请日：2016-05-05
摘要： A hydraulic steering system (1) is described comprising a steering unit (3) and a pressure source (4), said steering unit (3) comprising a working port arrangement (L, R) having two working ports, a supply port arrangement having a high pressure port (P) and a low pressure port (5), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle, and said pressure source (4) having a variable displacement.
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公开(公告)号：US09550521B2
公开(公告)日：2017-01-24
申请号：US14203615
申请日：2014-03-11
申请人： Sauer-Danfoss ApS
摘要： A hydraulic steering arrangement (1) is provided comprising a static steering unit (2) and an adjustable pressure source (3) connected to a pressure port (4) of said steering unit (2) and having a load sensing port (21). Such a steering unit should enable a fast reaction of the steering unit. To this end said pressure source (3) is a dynamic pressure source having an orifice (Adyn) outputting hydraulic fluid to said load sensing port (21), a load sensing line (22) connecting said load sensing port (21) and a low pressure port (11), a control valve (24) being arranged in said load sensing line (22) between said load sensing port (21) and said low pressure port (11), said control valve (24) being actuated by a control pressure within said steering unit (2) and throttling a flow through said load sensing line (22) depending on said control pressure.
摘要翻译： 提供了一种液压转向装置（1），其包括静态转向单元（2）和连接到所述转向单元（2）的压力端口（4）并具有负载感测端口（21）的可调压力源（3）。 这样的转向单元应该能够使转向单元快速反应。 为此，所述压力源（3）是具有向所述负载感测端口（21）输出液压流体的孔口（Adyn）的动态压力源，连接所述负载感测端口（21）的负载感测线路（22） 压力端口（11），控制阀（24），其布置在所述负载感测端口（21）和所述低压端口（11）之间的所述负载感测线路（22）中，所述控制阀（24）由控制 在所述转向单元（2）内的压力，并且根据所述控制压力节流通过所述负载感测线（22）。
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公开(公告)号：US09469340B2
公开(公告)日：2016-10-18
申请号：US14342956
申请日：2012-09-03
CPC分类号： B62D6/007 , A01B69/008 , B62D1/04 , B62D1/12 , B62D1/22 , B62D5/0463 , B62D5/093
摘要： A steerable, self-propelled vehicle (20) includes a rotatable steering column that is connected to control the steering angle of one or more ground-engaging members of the vehicle. The vehicle includes between the steering column and the ground-engaging member a first steering servomechanism having at least a first steering assistance characteristic; a second steering servomechanism having a second steering assistance characteristic also being connected to act on the steering column. A controller is provided for causing the first and second steering assistance characteristics to influence the steering of the vehicle in dependence on one or more one or more control commands generated in the controller.
摘要翻译： 可操纵的自行车辆（20）包括可旋转转向柱，其连接以控制车辆的一个或多个地面接合构件的转向角。 车辆包括在转向柱和地面接合构件之间具有至少第一转向辅助特性的第一转向伺服机构; 具有第二转向辅助特性的第二转向伺服机构也被连接以作用在转向柱上。 提供控制器，用于根据控制器中产生的一个或多个控制命令使第一和第二转向辅助特性影响车辆的转向。
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公开(公告)号：US09248855B2
公开(公告)日：2016-02-02
申请号：US14364272
申请日：2011-12-13
申请人： Hyung-Seok Park , Sung-Yong Jo
发明人： Hyung-Seok Park , Sung-Yong Jo
摘要： Disclosed is a steering system which is capable of ensuring that a wheeled excavator travels straight while being driven on a paved road. The steering system for wheeled construction equipment includes: a hydraulic oil pump; a steering motor connected to the hydraulic oil pump; a steering valve controlling the operation of the steering motor; a steering handle operating the steering motor and the steering valve according to steering manipulation by the driver; and a steering cylinder steered by the manipulation of the steering handle. The steering system further includes an idle mode control unit which converts working mode into a steering mode not having straight line driving recovery performance when working mode, in which working and driving are enabled, is selected, and which converts exclusive driving mode into a steering mode having the straight line driving recovery performance through a signal input when the exclusive driving mode, in which only driving is enabled, is selected.
摘要翻译： 公开了一种转向系统，其能够确保轮式挖掘机在铺设的道路上被驱动时直线行进。 轮式施工设备的转向系统包括：液压油泵; 连接到液压油泵的转向马达; 控制转向电动机的操作的转向阀; 根据驾驶员的转向操纵操纵转向马达和转向阀的转向手柄; 以及通过操纵转向手柄转向的转向盘。 该转向系统还包括空转模式控制单元，其将工作模式转换成在选择工作和驾驶的工作模式下不具有直线驱动恢复性能的转向模式，并且将排他驾驶模式转换为转向模式 当选择仅驱动启动的排他驾驶模式时，通过信号输入具有直线驱动恢复性能。
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8.发明授权Steering linkage interface between steering cylinder and ground drive pump displacement control arms 有权转向油缸与地面驱动泵位移控制臂之间的转向联动接口公开(公告)号：US09120504B2
公开(公告)日：2015-09-01
申请号：US13833598
申请日：2013-03-15
申请人： Deere & Company
发明人： Thomas D. Bebernes , Stephen E O'Brien , Thomas A. Nichols , Mitchell R. Usasz , Kyle R. Teach , David V. Rotole , Walter C. Wright
CPC分类号： B62D11/005 , B62D5/093 , B62D11/02
摘要： A four-bar linkage is provided as a mechanical interface for transferring respective outputs from a speed/direction control device and a hydraulic steering cylinder to displacement control arms of a pair of pumps of a dual-path hydrostatic transmission including a pair of motors respectively coupled for driving a pair of front wheels of a vehicle. The hydraulic steering cylinder is fixed and has a piston rod slidably coupled to an input arm of the four-bar linkage in such a way that a rotation speed decrease occurs as the arm and a linked control plate are pivoted from a neutral position, the control plate transferring pivotal movement to effect differential movement of the displacement control arms. This results in the vehicle speed decreasing during a turn.
摘要翻译： 提供四杆联动装置作为机械接口，用于将来自速度/方向控制装置和液压转向缸的各个输出传递到双路静液压传动装置的一对泵的位移控制臂，该双通道静液压传动装置分别耦合 用于驾驶车辆的一对前轮。 液压转向缸是固定的，并且具有可滑动地联接到四杆联动装置的输入臂的活塞杆，使得随着臂和联动的控制板从中立位置枢转而发生转速减小，控制 板移动枢转运动以实现位移控制臂的差动运动。 这导致在转弯期间车辆速度降低。
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公开(公告)号：US20050205337A1
公开(公告)日：2005-09-22
申请号：US11061559
申请日：2005-02-18
申请人： Bendt Porskrog , Kjeld Jensen , Finn Nielsen , Svend Thomsen
发明人： Bendt Porskrog , Kjeld Jensen , Finn Nielsen , Svend Thomsen
摘要： The invention concerns a hydraulic steering with a steering initiator, a steering unit with feedback properties, which can be activated by the steering initiator, the steering unit having a supply connection arrangement with a pressure connection (P) and a tank connection (T) and a working connection arrangement with two working connections (L, R), an auxiliary-force operated steering valve, which is located in parallel with the steering unit between the supply connection arrangement (P, T) and the working connection arrangement (L, R), and a feedback suppressing device, which is active, when the steering valve is active. It is endeavoured to find a simple manner of ensuring the priority of the steering initiator over the steering valve. For this purpose, the steering initiator interacts with an activation sensor, which deactivates the feedback suppressing device on an activation of the steering initiator.
摘要翻译： 本发明涉及具有转向启动器的液压转向器，具有反馈特性的转向单元，其可以由转向启动器启动，转向单元具有带有压力连接（P）和油箱连接（T）的供应连接装置，以及 工作连接装置，具有两个连接工作连接（L，R）的辅助力操作转向阀，该辅助动力转向阀与供给连接装置（P，T）和工作连接装置（L，R）之间的转向单元平行 ）以及当转向阀处于活动状态时有效的反馈抑制装置。 努力寻找一种确保转向启动器优先于转向阀的简单方式。 为此，转向启动器与激活传感器进行交互，激活传感器在转向启动器的激活时使反馈抑制装置停用。
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公开(公告)号：US06863147B2
公开(公告)日：2005-03-08
申请号：US10443823
申请日：2003-05-23
申请人： Tommaso Catellani
发明人： Tommaso Catellani
CPC分类号： B62D5/093
摘要： Hydrostatic power steering device comprising a source of pressurized fluid, a cylindrical barrel-type distributor the elements of which are connected elastically together, and of which the inner element, the so called spindle, is connected to the steering wheel; the distributor being arranged to assume a central position, the so-called neutral position, in which it directly short-circuits, to discharge, the fluid originating from the source of pressurized fluid, and two positions, symmetrical about the central position, in which the distributor, via a dispenser of orbital type the rotor of which is rigidly connected to the steering wheel shaft and to the spindle, feeds the fluid to one and respectively to the other of the chambers of a hydraulic actuator connected to the steering wheel; the device also comprises an auxiliary conduit for feeding the pressurized fluid to the cylindrical distributor; a slide valve operable by the driver to feed said auxiliary feed conduit when desired; a barrel locking system operated by the pressure of the fluid present in said auxiliary feed conduit; and holes and grooves in the barrel and in the spindle to directly connect said auxiliary feed conduit to one or other chamber of the actuator without passing through the dispenser rotor.
摘要翻译： 包括加压流体源的液压动力转向装置，其元件弹性地连接在一起的圆柱形桶形分配器，并且所述内部元件（所谓的主轴）连接到方向盘; 分配器被布置成呈现中心位置，所谓的中性位置，其中它直接短路，排出来自加压流体源的流体，以及关于中心位置对称的两个位置，其中 分配器通过轨道式分配器，其转子刚性地连接到方向盘轴和主轴，将流体馈送到连接到方向盘的液压致动器的一个并分别送到另一个腔室; 该装置还包括用于将加压流体供给到圆筒形分配器的辅助管道; 滑动阀，其可由驾驶员操作以在需要时供给所述辅助进料管道; 由所述辅助进料导管中存在的流体的压力操作的桶锁系统; 以及筒体和主轴中的孔和凹槽，以将所述辅助进料导管直接连接到致动器的一个或另一个室，而不通过分配器转子。
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