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公开(公告)号：US10919585B2
公开(公告)日：2021-02-16
申请号：US15737766
申请日：2016-07-27
发明人： Mohsen Bagheri , Josef Schleupen
IPC分类号： B62D5/065 , B62D55/14 , B62D55/075 , E02B17/00 , E04G3/28 , F03D80/50 , B66B9/187 , B62D57/024 , B66B9/00 , B62D55/065 , B62D55/26
摘要： The invention relates to a travel system for cylindrical and/or conical surfaces, in particular for the outer surface or the inner surface of a pipe or mast (1), having: an assembly platform (4a, 4b); a plurality of connected undercarriage elements (6), preferably identical undercarriage elements (6), which form a closed ring in a circumferential direction, in particular together with the assembly platform (4a, 4b) integrated between two undercarriage elements (6); a clamping system (7) which connects at least the undercarriage elements (6) to each other and with which the distance between the connected undercarriage elements (6) can be changed; at least one other undercarriage element (8) which is situated on the assembly platform (4a, 4b) at an axial distance from the ring of connected undercarriage elements (6); wherein at least the undercarriage elements (6) connected to the ring, preferably also the undercarriage element (8) axially spaced therefrom, are each in the form of a continuous track system. The invention also relates to a continuous track vehicle (11), in particular a 2-track continuous track vehicle (11), having at least one chain guided around two spaced deflection wheels (17), in particular deflection gears (17), running surface elements (20) being secured to the links (18) of the chain, wherein the running surface elements (20) each comprise rollers (21) for contacting a driving surface, the axes of rotation of the rollers being oriented in the direction in which the deflection wheels (17) are spaced or the running surface elements (20) being displaceable relative to the associated link (18) by at least one actuator (24).
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公开(公告)号：US10518802B2
公开(公告)日：2019-12-31
申请号：US15855659
申请日：2017-12-27
发明人： Zong-Li Wang , Jin-Yan Hsu
摘要： A method for controlling a power steering system of a road vehicle includes: after the road vehicle is started, activating only an EPS subsystem; afterward, activating an EHPS subsystem when a speed of the road vehicle is not higher than a predetermined speed threshold; once the EHPS subsystem is activated, controlling the hydraulic motor of the EHPS subsystem to rotate at a rotational speed lower than a pre-set rotational speed when a torque applied to a steering column is smaller than a predetermined torque threshold.
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公开(公告)号：US10421484B2
公开(公告)日：2019-09-24
申请号：US15639606
申请日：2017-06-30
发明人： Jeffrey B. Fay, II
IPC分类号： B62D5/06 , B62D7/10 , B62D7/22 , B62D5/065 , B62D7/16 , B62D5/12 , B62D5/26 , B62D7/06 , B62D9/00 , B62D11/24 , B60B33/00
摘要： The disclosure relates to a steering system useful for providing stable control during rear axle steering of harvesters, such as self-propelled windrowers. The steering system utilizes a single steering cylinder and retracted caster cylinders to regulate rotation of the casters during rear axle road operation mode. The steering system locks the steering cylinder and uses the caster cylinders for damping during in-field operation mode.
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公开(公告)号：US20190248409A1
公开(公告)日：2019-08-15
申请号：US16272355
申请日：2019-02-11
发明人： Takeshi Nishida , Tsuyoshi Ikeda
摘要： A vehicle steering assist system, including an engine pump, a flow-rate restricting mechanism, a motor pump, a motor-pump controller, and a steering-force assist device, wherein the steering assist system is configured to restrict an engine-pump ejection flow rate to be lower than a required receiving flow rate to be received by the assist device when the engine pump is operated by being driven by an engine rotating at an idling speed, the engine-pump ejection flow rate being a flow rate of a working fluid ejected from the engine pump to the assist device via the restricting mechanism, and wherein the motor-pump controller is configured to control a motor-pump ejection flow rate such that an insufficient flow rate of the working fluid is covered by the motor-pump ejection flow rate, the insufficient flow rate being a shortage in the required receiving flow rate not covered by the engine-pump ejection flow rate.
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公开(公告)号：US10252718B2
公开(公告)日：2019-04-09
申请号：US15262122
申请日：2016-09-12
发明人： Young-Seol Choi
摘要： A method for controlling operation of a hydraulic idle stop and go (ISG) system using an electro hydraulic power steering (EHPS) system includes measuring a pressure in an accumulator, a steering angle, and a steering angular velocity; determining whether the measured pressure in the accumulator is less than an absolute value of a first reference pressure; determining whether the measured steering angle is less than an absolute value of a reference angle when the measured pressure in the accumulator is less than the absolute value of the first reference pressure; determining whether the measured steering angular velocity is less than an absolute value of a reference angular velocity when the measured steering angle is less than the absolute value of the reference angle; and opening a solenoid valve when the measured steering angular velocity is less than the absolute value of the reference angular velocity.
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公开(公告)号：US20180319431A1
公开(公告)日：2018-11-08
申请号：US15970311
申请日：2018-05-03
发明人： Niels Arbjerg , Charles Anthony Bates , Poul Ennemark , Mogens Frederiksen , Casper Mikael Olesen
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 (5) and a tank port (T) connected to a tank flow path (6), a working port arrangement having a left working port (L) connected to a left working flow path (7) and a right working port (R) connected to a right working flow path (8), a bridge arrangement (14) of variable neutral open orifices, said bridge arrangement (14) comprising a first left orifice (A2L) connected to a main flow path (5) and to the left working flow path (7), a first right orifice (A2R) connected to a main flow path (5) and to the right working flow path (8), a second left orifice (A3L) connected to the left working flow path (7) and to the tank flow path (6), and a second right orifice (A3R) connected to the right working flow path (8) and to the tank flow path (6). Such a steering unit has a good steering behavior but can function as a closed-center solution. To this end a further variable orifice arrangement is arranged between the supply port (P) arrangement and the working port arrangement (T), which further orifice arrangement is closed in neutral position.
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公开(公告)号：US20180022380A1
公开(公告)日：2018-01-25
申请号：US15654203
申请日：2017-07-19
申请人： Weber-Hydraulik GmbH
发明人： Ralf Naumann , Torsten Winkler
摘要： A hydraulic drive arrangement (1) for the pressure supply of a hydraulic steering system (20), particularly for construction or agricultural machines, including a hydraulic pump (2) and an electric drive. It is essential that the electric drive is designed in a redundant fashion and has two separately controlled electric drive engines (3a, 3b), which are mechanically coupled via the hydraulic pump (2) in a rigid fashion, and that the separate control circuits (6a, 6b, 7a, 7b) are provided by which a variable load distribution can be specified for the electric drive engines (3a, 3b).
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公开(公告)号：US09821840B2
公开(公告)日：2017-11-21
申请号：US14364018
申请日：2012-11-30
CPC分类号： B62D5/075 , B62D5/065 , B62D5/07 , E02F9/0841 , E02F9/225 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F15B11/042 , F15B11/162 , F15B11/167 , F15B2211/351 , F15B2211/455
摘要： A hydraulic control device includes: a hydraulic pump connected in parallel to steering and boom cylinders; a steering control valve that controls the direction of operating oil flowing through the steering cylinders; a boom control valve that connects the hydraulic pump to a tank when the valve is at a neutral position and controls the direction of the oil flowing through the boom cylinders when the valve is at an offset position; a meter-in pressure compensator that increases flow rate of the oil flowing through a variable restrictor of the steering control valve in accordance with pressure in front of and behind the restrictor; and a bleed-off pressure compensator that decreases flow rate of the oil flowing through the boom control valve in accordance with the increase in pressure of the oil flowing through the steering cylinders to maintain the predetermined pressure of the oil in the steering control circuit.
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公开(公告)号：US09744990B2
公开(公告)日：2017-08-29
申请号：US15147358
申请日：2016-05-05
摘要： A hydraulic steering system 1 is described comprising a steering unit and a priority valve, said steering unit comprising a working port arrangement having two working ports, a supply port arrangement having a high pressure port and a low pressure port, a load sensing port, a main flow path having a main bleed and a metering device and being arranged between said high pressure port and said working port arrangement, an amplification flow path having an amplification bleed and being arranged between said high pressure port and said working port arrangement, said main bleed and said amplification bleed being controlled together by means of a steering handle and being closed in neutral position of said steering handle, wherein said priority valve comprises a priority outlet connected to said high pressure port of said steering unit, a valve element moveable in a priority direction to connect an inlet of said priority valve to said priority outlet, and a load sensing connection connected to said load sensing port of said steering unit, said priority outlet being connected to said load sensing connection via a priority valve bleed, a pressure at a point downstream said priority bleed acting on said valve element in said priority direction, wherein said load sensing port is connected to said low pressure port via a drain bleed being open in neutral position of said steering handle and closing upon actuation of said steering handle out of said neutral position.
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公开(公告)号：US09744989B1
公开(公告)日：2017-08-29
申请号：US15138312
申请日：2016-04-26
摘要： A hydraulic control system for steering rear caster wheels of a work machine. The control system has a steering mode that proportionally controls the steering of rear caster wheels while compensating the circuit to keep steering performance independent from the load generated by the rear caster wheels, a no steering mode that maintains the position of the rear caster wheels in the absence of a steering command, and a freewheeling mode that permits the rear caster wheels to rotate freely 360°.
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