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1. 发明公开

US20240359731A1 HYDRAULIC STEERING SYSTEM 审中-公开
公开(公告)号：US20240359731A1
公开(公告)日：2024-10-31
申请号：US18645993
申请日：2024-04-25
申请人： Danfoss Power Solutions ApS
发明人： Emil Nørregard Olesen
IPC分类号： B62D5/08 , B62D5/06 , B62D5/09
CPC分类号： B62D5/08 , B62D5/062 , B62D5/09
摘要： A hydraulic steering system (1) including a supply port arrangement having a supply port (P) and a return port (T), a working port arrangement having two working ports (L, R), and a measuring motor (4). The steering behavior of such a steering system should be improved. To this end for each steering direction the measuring motor (4) is arranged in flow direction between the working port (L, R) and the return port (T).

2. 发明授权

US11667325B2 Hydraulic circuit 有权
公开(公告)号：US11667325B2
公开(公告)日：2023-06-06
申请号：US16760427
申请日：2018-10-30
申请人： DANA ITALIA S.R.L.
发明人： Davide Moser , Stefano Fasano , Maurizio Bartoli
IPC分类号： B62D5/08 , B62D5/065 , B62D5/09 , B62D5/12
CPC分类号： B62D5/08 , B62D5/065 , B62D5/09 , B62D5/12
摘要： A hydraulic circuit, in particular to a hydraulic steering circuit for steering at least one vehicle axle, the hydraulic circuit including a first fluid path having a first end and a second end and providing fluid communication or selective fluid communication between the first end and the second end of the first fluid path; and a second fluid path providing fluid communication or selective fluid communication between the first end of the first fluid path and the second end (2) of the first fluid path, in parallel to the first fluid path or to a section thereof. In some aspects, the first fluid path includes a first hydraulic displacement unit; and the second fluid path includes at least a first proportional bypass control valve for controlling a bypass fluid flow in the second fluid path. The hydraulic steering circuit may be part of a driveline for a vehicle.

3. 发明授权

US10843725B2 Hydraulic steering unit 有权
公开(公告)号：US10843725B2
公开(公告)日：2020-11-24
申请号：US15970231
申请日：2018-05-03
申请人： Danfoss Power Solutions ApS
发明人： Niels Arbjerg , Charles Anthony Bates , Poul Ennemark , Mogens Frederiksen , Casper Mikael Olesen
IPC分类号： B62D5/08 , B62D5/065 , B62D5/093 , B62D7/14 , B62D5/14
CPC分类号： B62D5/065 , B62D5/08 , B62D5/093 , B62D5/14 , B62D7/144
摘要： A hydraulic steering unit (1) is described comprising a supply port arrangement having a pressure port (P) connected to a main flow path (2) and a tank port (T) connected to a tank flow path (3), a first working port arrangement having a first left working port (L1) connected to a first left working flow path (4) and a first right working port (R1) connected to a first right working flow path (5), a variable first left orifice (A2L) connected to the main flow path (2) and to the first left working flow path (4), a variable first right orifice (A2R) connected to the main flow path (2) and to the first right working flow path (5), a variable second left orifice (A3L) connected to the first left working flow path (4) and to the tank flow path (3), a variable second right orifice (A3R) connected to the first right working flow path (5) and to the tank flow path (3), and a second working port arrangement having a second left working port (12) connected to a second left working flow path (9) and a second right working port (R2) connected to a second right working flow path (10), wherein the variable first left orifice (A2L) is connected to the second left working flow path (9) and the variable first right orifice (A2R) is connected to the second right working flow path (10).

4. 发明申请

US20180319426A1 HYDRAULIC STEERING UNIT 审中-公开
公开(公告)号：US20180319426A1
公开(公告)日：2018-11-08
申请号：US15970211
申请日：2018-05-03
申请人： Danfoss Power Solutions ApS
发明人： Niels Arbjerg , Charles Anthony Bates , Poul Ennemark , Mogens Frederiksen , Casper Mikael Olesen
IPC分类号： B62D5/065 , B62D5/08 , B62D5/14
CPC分类号： B62D5/065 , B62D5/08 , B62D5/093 , B62D5/14
摘要： A hydraulic steering unit (1) is described comprising a supply port arrangement having a pressure port (8) connected to a main flow path (2) and a tank port (5) connected to a tank flow path (3), a working port arrangement having a left working port (L) connected to a left working flow path (4) and a right working port (R) connected to a right working flow path (5), a variable first left orifice (A2L) connected to the main flow path (2) and to the left working flow path (4), a variable first right orifice (A2R) connected to the main flow path (2) and to the right working flow path (5), a variable second left orifice (A3L) connected to the left working flow path (4) and to the tank flow path (3), and a variable second right orifice (A3R) connected to the right working flow path (5) and to the tank flow path (3). Such a steering unit should allow comfortable steering. To this end a measuring motor (15) is arranged in one of the working flow parts (4, 5).

5. 发明申请

US20160288827A1 REAR STEERING CONTROL FOR A VEHICLE 审中-公开
公开(公告)号：US20160288827A1
公开(公告)日：2016-10-06
申请号：US15183475
申请日：2016-06-15
申请人： Deere & Company
发明人： Thomas D BEBERNES , Thomas A NICHOLS , David V ROTOLE , Walter C WRIGHT , Eric R LANG , Mitchell R USASZ
IPC分类号： B62D6/10 , B62D5/09 , B62D5/12 , B62D5/08
CPC分类号： B62D6/10 , A01B69/007 , A01B69/008 , B62D5/08 , B62D5/09 , B62D5/091 , B62D5/12 , B62D11/24
摘要： A steering system and method are described for a vehicle having steerable front and rear wheels. A rear hydraulic steering device may be coupled to one or more of the rear wheels. A rear valve assembly may hydraulically control the rear hydraulic steering device to steer the rear wheels based upon a rear steering command. In a rear steering assist mode, the rear steering command may be determined based upon a manual steering input received at a steering input device. In an automated steering mode, the rear steering command may be determined based upon a target path of the agricultural vehicle that is determined independently of the manual steering input.

6. 发明授权

US5529137A Power-assisted steering for motor vehicles 失效
标题翻译：机动车动力辅助转向
公开(公告)号：US5529137A
公开(公告)日：1996-06-25
申请号：US500929
申请日：1995-08-04
申请人： Armin Lang
发明人： Armin Lang
IPC分类号： B62D5/08 , B62D5/22
CPC分类号： B62D5/081 , B62D5/08 , Y10T137/86919
摘要： In a servo steering unit which is designed particularly for motor vehicles, a pinion in a steering housing meshes with a steering rack. A steering valve which serves to control the pressure medium for the servo steering unit has two inlet seat valves (10, 11) and two outlet seat valves (12, 13) whose closing members (14, 18) are displaced by actuating tappets (16, 17) depending on the rotation of a steering spindle. The outlet seat valves (12, 13) are open in the neutral position of the steering valve. The inlet seat valves (10, 11) can be actuated by the force of pressure springs (15) in the closing direction and are not opened until after closing of the associated outlet seat valve (12, 13). The pressure springs of both inlet seat valves (10, 11) on one side press against the actuating tappets (16, 17) and on the other side press constantly on the closing member (14). The pressure springs (15) are designed so that they exert a closing force on the closing members (14) in the neutral position of the steering valve and so that during displacement of the steering valve away from its neutral position, one of the pressure springs (15) rests without applying force on the closing member (14) as soon as the associated outlet seat valve (12, 13) is closed. This provides a servo steering system which, to a large extent, operates irrespective of production tolerances with a desired and constant power take-off.
摘要翻译： PCT No.PCT / EP94 / 00326 Sec。 371日期：1995年8月4日 102（e）日期1995年8月4日PCT 1994年2月5日提交PCT公布。出版物WO94 / 18051 日期为1994年8月18日。在专为机动车设计的伺服转向装置中，转向壳中的小齿轮与转向架啮合。用于控制用于伺服转向单元的压力介质的转向阀具有两个入口座阀（10,11）和两个出口座阀（12,13），其闭塞件（14,18）由致动挺杆（16），17）取决于转向主轴的旋转。出口座阀（12,13）在转向阀的中间位置打开。入口座阀（10,11）可以通过压力弹簧（15）在关闭方向上的作用而被致动，并且在打开关闭的出口座阀（12,13）之前不会打开。两个入口座阀（10,11）的压力弹簧压靠在致动挺杆（16,17）上，而另一侧的压力弹簧压紧在封闭件（14）上。压力弹簧（15）被设计成使得它们在转向阀的中立位置上对闭合构件（14）施加闭合力，并且使得在转向阀从其中立位置移位期间，压力弹簧一旦相关联的出口座阀（12,13）关闭，（15）就不会在关闭构件（14）上施加力就停止。这提供了一种伺服转向系统，该伺服转向系统在很大程度上以与期望的和恒定的动力输出的生产公差无关地运行。

7. 发明授权

US5509494A Auxiliary power steering 失效
标题翻译：辅助动力转向
公开(公告)号：US5509494A
公开(公告)日：1996-04-23
申请号：US475095
申请日：1995-06-07
申请人： Armin Lang
发明人： Armin Lang
IPC分类号： B62D5/08 , B62D5/06
CPC分类号： B62D5/08
摘要： In an auxiliary power steering intended especially for motor vehicles, a pinion (2) positioned in a steering housing (1) engages a steering rack (9). A steering valve (14) that is used to control the pressure medium for the auxiliary power steering provides two inlet-seat valves (15, 16) and two outlet-seat valves (17, 18) whose closing bodies (20, 21, 35, 36) can be shifted in the axial direction by a rotary movement of a steering spindle. Closing bodies (20, 21) of inlet-seat valves (15, 16) can be biased in the closing direction by the force of pressure springs (22, 23). In the process, pressure springs (22, 23) bias the closing bodies (20, 21) of inlet-seat valves (15, 16) only if the particular outlet-seat valves (17, 18) are in their neutral position. Each pressure spring (22, 23)--when steering valve (14) is in the neutral position--keeps closing body (20, 21) of the particular inlet-seat valve (15, 16) resting against a valve seat (26, 27) that is fixed on the housing. When steering valve (14) is shifted from its neutral position, then one of the outlet-seat valves (17, 18) in each case will lift the pressure spring (22, 23) of the particular inlet-seat valve (15, 16) over the disc (24, 25) and off the closing body (20, 21) of inlet-seat valve (15, 16).
摘要翻译：在特别用于机动车辆的辅助动力转向器中，位于转向壳体（1）中的小齿轮（2）与转向齿条（9）接合。用于控制用于辅助动力转向器的压力介质的转向阀（14）提供两个入口座阀（15,16）和两个出口座阀（17,18），它们的封闭体（20,21,35 ，36）可以通过转向主轴的旋转运动在轴向方向上移动。入口座阀（15,16）的关闭体（20,21）可以通过压力弹簧（22,23）的作用力在关闭方向偏置。在该过程中，仅当特定的出口座阀（17,18）处于其中立位置时，压力弹簧（22,23）偏压入口座阀（15,16）的关闭体（20,21）。每个压力弹簧（22,23） - 当转向阀（14）处于中间位置时 - 保持特定入口座阀（15,16）的关闭体（20,21）抵靠阀座（26,27））固定在外壳上。当转向阀（14）从其中立位置移动时，每个出口座阀（17,18）中的一个将提升特定入口阀（15,16）的压力弹簧（22,23））离开所述盘（24,25）并且从所述入口阀（15,16）的所述关闭体（20,21）离开。

8. 发明授权

US5287764A Device for actuating a hydraulic power steering system 失效
标题翻译：用于启动液压动力转向系统的装置
公开(公告)号：US5287764A
公开(公告)日：1994-02-22
申请号：US910259
申请日：1992-09-14
申请人： Wilhelm Beer
发明人： Wilhelm Beer
IPC分类号： B62D5/087 , B62D5/08 , B62D5/22 , B62D5/06
CPC分类号： B62D5/22 , B62D5/08 , Y10T74/1967
摘要： Apparatus for actuating a hydraulic power steering system for automotive vehicles, wherein the steering shaft (1 ) is allowed to roll off on the gear rack (3) to a small degree to actuate the steering valve. To enable this rolling motion, the steering shaft (1 ) is supported in a sleeve (9) which, in turn, is supported through needle bearings (10) so as to be rotatable in relation to the steering gear housing (4). To prevent inadvertent steering maneuvers in the event of partial or complete system failure, the needle bearing axis is arranged in parallel to the center line of the steering shaft (1) as well as in one plane with the steering shaft and with the point of force transmission between pinion (2) and gear rack (3). The needle bearing axis is radially outward from the central point of the steering shaft axis than the point of force transmission. A captivated spring (24) is provided to retain the valve slide (19) in its neutral position.
摘要翻译： PCT No.PCT / EP91 / 01039 Sec。 371日期：1992年9月14日 102（e）1992年9月14日PCT PCT 1991年6月6日PCT公布。公开号WO92 / 08637 日期：1992年5月29日。用于致动用于机动车辆的液压动力转向系统的装置，其中转向轴（1）允许在齿轮架（3）上滚动一小部分以致动转向阀。为了能够进行这种滚动运动，转向轴（1）支撑在套筒（9）中，套筒（9）又通过滚针轴承（10）支撑成相对于转向齿轮箱（4）可旋转。在部分或完整的系统故障的情况下，为了防止无意的转向操作，滚针轴线平行于转向轴（1）的中心线以及与转向轴在一个平面中并与力齿轮（2）和齿条（3）之间的传动。滚针轴承从转向轴轴线的中心点向径向向外比力传递点径向向外。设有一个被锁住的弹簧（24），用于将阀滑块（19）保持在其中立位置。

9. 发明授权

US5058618A Relief valve for hydraulic fluid 失效
标题翻译：液压油止回阀
公开(公告)号：US5058618A
公开(公告)日：1991-10-22
申请号：US627532
申请日：1990-12-14
申请人： Joan S. Bacardit
发明人： Joan S. Bacardit
IPC分类号： B62D5/07 , B62D5/08 , F16K17/04
CPC分类号： B62D5/08 , F16K17/0473 , Y10T137/2612 , Y10T137/262
摘要： The relief valve issued for controlling the pressure of a hydraulic fluid within a first duct 30 opening into a bore 14,16 provided in a body 10, a communication between the first duct 30 and a second duct 34 connecting a primary hydraulic circuit under pressure to the bore 14,16 being provided in rest position of a valve member when the pressure within the first duct 30 is lower than a threshold determined by the preload of resilient mechanism urging the valve member in rest position, the communication being interrupted when the pressure in the first duct 30 sensibly reaches the threshold. An increase of the pressure in the first duct beyond the threshold results in providing a communication between the first duct 30 and a third duct 38 connected to a low pressure circuit.

10. 发明授权

US5048628A Power assisted steering system 失效
标题翻译：助力转向系统
公开(公告)号：US5048628A
公开(公告)日：1991-09-17
申请号：US224999
申请日：1988-07-27
申请人： Alan Rayner
发明人： Alan Rayner
IPC分类号： B62D5/07 , B62D5/08 , B62D6/02
CPC分类号： B62D5/08 , B62D6/02
摘要： An hydraulic fluid actuated power assisted steering system has an open center valve 4 adjustable in response to a steering input to control fluid flow to a power assistance ram 6. A by-pass valve 8 communicates between a pressure line 3 and a return line 7 of the valve 4. The by-pass valve has a control port 11 which is adjustable by a valve member 9 spring biased at 10 to normally open the control port 11 so that fluid flow from line 3 to line 7 by way of port 11 alleviates the generation of noise in the valve 4 and back pressure in the line 3. The valve member 9 is responsive to a predetermined fluid pressure differential developing between the line 3 and 7 when the valve 4 is operated so that the member 9 is displaced to close port 11 and direct greater fluid flow from pump 2 to the ram 6.The power assistance may be speed responsive by increasing the resistance to displacement of the valve member 9 in a sense to close the port 11 by providing pistons 30 which engage the valve member 9 with a force which increases with vehicle speed, such force being provided by the application of fluid pressure to the pistons 30 from a vehicle speed responsive pump 33.

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