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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
Applicant: Danfoss Power Solutions ApS
Inventor： Abdul Karim Rahimzai
Abstract: 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：US20150275932A1
公开(公告)日：2015-10-01
申请号：US14430564
申请日：2012-09-28
Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
Inventor： Bo Vigholm , Andreas Ekvall
CPC classification number: F15B11/17 , B62D5/075 , E02F9/0841 , E02F9/2225 , E02F9/2239 , E02F9/225 , E02F9/2292 , F15B11/161 , F15B11/162 , F15B13/022 , F15B2211/20576 , F15B2211/4053 , F15B2211/781
Abstract: A hydraulic system for a work machine including a first and a second hydraulic actuator, and a first and a second hydraulic machine for providing hydraulic fluid to at least one of the first and the second actuator via a first and a second priority valve respectively. The first and second priority valves are controlled by a pressure drop ΔP over the inlet valve of the first actuator such that when ΔP is lower than a first threshold value T1, a flow of hydraulic fluid is allowed only to the first actuator. The second priority valve allows a flow of hydraulic fluid to both the first and second actuator for a pressure drop higher than T1. The first priority valve is further configured to allow a flow of hydraulic fluid to both of the first and second actuator for a pressure drop higher than a second threshold value T2 which is higher than T1.
Abstract translation: 一种用于包括第一和第二液压致动器的作业机械的液压系统，以及分别经由第一和第二优先阀向第一和第二致动器中的至少一个提供液压流体的第一和第二液压机械。 第一和第二优先阀通过第一致动器的入口阀上的压降Dgr; P来控制，使得当＆Dgr; P低于第一阈值T1时，仅允许液压流体流到第一致动器 。 第二优先阀允许液压流体流向第一和第二致动器以达到高于T1的压降。 第一优先阀还被构造成允许液压流体流向第一和第二致动器两者以达到高于高于T1的第二阈值T2的压降。
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公开(公告)号：US20080067865A1
公开(公告)日：2008-03-20
申请号：US11901824
申请日：2007-09-19
Applicant: Albert C. Wong , Tom C. Wong , Rick L. Lincoln , James L. Davison
Inventor： Albert C. Wong , Tom C. Wong , Rick L. Lincoln , James L. Davison
CPC classification number: B62D5/075 , B60T13/165 , B62D5/07
Abstract: A vehicular hydraulic system having a hydraulic pump, a first hydraulic application and a second hydraulic application arranged in series. A relief valve is arranged parallel with the second application to allow fluid to bypass the second application when fluid pressure upstream of the second application exceeds a threshold value. The first and second applications may be a brake assist device and a steering gear assist device. The hydraulic system may also include a priority valve for diverting a portion of the fluid flow to the second application when the pressure upstream of the first application exceeds a threshold value. The threshold value for the first application may be greater than the threshold value for the second application. The hydraulic system may include a pump having a discharge rate that falls within a predefined range. A check valve may also be arranged parallel with the relief valve and second application.
Abstract translation: 一种具有液压泵，第一液压应用和第二液压应用的车辆液压系统。 安全阀与第二应用平行布置，以便在第二应用的上游流体压力超过阈值时允许流体绕过第二应用。 第一和第二应用可以是制动辅助装置和舵机辅助装置。 当第一应用的上游压力超过阈值时，液压系统还可以包括优先阀，用于将一部分流体流转向第二应用。 第一应用的阈值可以大于第二应用的阈值。 液压系统可以包括具有落在预定范围内的排出速率的泵。 止回阀也可以与安全阀和第二应用平行布置。
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公开(公告)号：US20060260301A1
公开(公告)日：2006-11-23
申请号：US11434229
申请日：2006-05-16
Applicant: Naoki Yoshida , Kiyoshi Inoue , Makoto Wagatsuma , Toru Takamura
Inventor： Naoki Yoshida , Kiyoshi Inoue , Makoto Wagatsuma , Toru Takamura
IPC: F16D31/02
CPC classification number: B66F9/07572 , B62D5/065 , B62D5/075 , B66F9/07568
Abstract: A priority flow rate control valve (30) distributes pressurized working oil discharged from a hydraulic pump (10) driven by an electric motor (11) to a power steering device (20) first, and distributes the residual pressurized working oil to a cargo handling device (19). The rotation speed of the electric motor (11) and the distribution ratio of the pressurized working oil of the priority flow rate control valve (30) vary depending on the operation states of these devices (19, 20). By decreasing the rotation speed of the electric motor (11) at a rate smaller than a normal decrease rate when the cargo handling device (2) stops operation in a state where the power steering device (20) and the cargo handling device (19) are in operation, a kickback in a steering wheel (7) due to a response delay of the priority flow rate control valve (30) can be prevented.
Abstract translation: 优先流量控制阀（30）首先将从电动机（11）驱动的液压泵（10）排出的加压工作油分配到动力转向装置（20），并将剩余的加压工作油分配到货物处理 装置（19）。 电动机（11）的转速和优先流量控制阀（30）的加压工作油的分配比根据这些装置（19,20）的运转状态而变化。 通过在动力转向装置（20）和货物搬运装置（19）的状态下货物处理装置（2）停止运转时，以比正常减速度小的速度降低电动机（11）的转速， 可以防止由于优先流量控制阀（30）的响应延迟而在方向盘（7）中的反冲。
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公开(公告)号：US4044786A
公开(公告)日：1977-08-30
申请号：US708657
申请日：1976-07-26
Applicant: James K. Yip
Inventor： James K. Yip
IPC: G05B11/60 , B62D5/07 , F03B15/06 , F15B11/02 , F15B11/16 , F15B11/17 , F15B13/02 , G05B11/44 , F15B18/00
CPC classification number: F15B11/162 , B62D5/075 , F15B11/17 , F15B13/022 , F15B2211/20553 , F15B2211/20576 , F15B2211/30505 , F15B2211/30585 , F15B2211/325 , F15B2211/351 , F15B2211/4053 , F15B2211/45 , F15B2211/6055 , F15B2211/6057 , F15B2211/65 , F15B2211/781 , Y02E10/226 , Y10T137/2524
Abstract: A system for providing pressurized fluid to a primary load circuit and an auxiliary load circuit, the primary load circuit being of the type which provides a load pressure signal representative of the demand for fluid in the primary load circuit. The system includes first and second fluid pumps feeding first and second priority flow control valves, respectively, each of which has a primary outlet port connected to the primary load circuit and an auxiliary outlet port connected to the auxiliary load circuit. When the flow demand of the primary load circuit can be satisfied by the first pump, any excess flow available is fed by the first flow control valve to the auxiliary load circuit, and all of the flow from the second pump goes to the auxiliary circuit. If the flow demand of the primary load circuit is greater then the capacity of the first pump, all of its flow passes to the primary load circuit with none going to the auxiliary load circuit, and a novel pilot valve arrangement permits the load pressure signal from the primary load circuit to bias the second flow control valve to a position where a sufficient amount of the flow from the second pump is fed to the primary load circuit to meet the demand thereof, with the remainder of the flow going from the second flow control valve to the auxiliary load circuit.
Abstract translation: 一种用于将加压流体提供给主负载电路和辅助负载电路的系统，所述主负载电路是提供代表对主负载电路中的流体需求的负载压力信号的类型的系统。 该系统包括分别供应第一和第二优先流量控制阀的第一和第二流体泵，每个流量控制阀具有连接到主负载回路的主出口和连接到辅助负载回路的辅助出口。 当主负载电路的流量需求可以由第一泵满足时，任何可用的过量流量由第一流量控制阀馈送到辅助负载回路，并且来自第二泵的所有流量都流到辅助回路。 如果主负载电路的流量需求大于第一泵的容量，则其所有流量都不会传递到主负载电路，而不需要辅助负载电路，并且新颖的先导阀装置允许负载压力信号从 所述主负载电路将所述第二流量控制阀偏置到足够量的来自所述第二泵的流量被供给到所述主负载电路以满足其要求的位置，其中所述流量来自所述第二流量控制 阀门到辅助负载电路。
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Patent Agency Ranking
公开(公告)号：US20240359730A1
公开(公告)日：2024-10-31
申请号：US18611783
申请日：2024-03-21
Applicant: DEERE & COMPANY
Inventor： MANUEL BILLICH
CPC classification number: B62D5/075 , B60T13/686 , F15B13/0401 , B60T2260/02
Abstract: An apparatus for operating a load-controlled hydraulic supply of an agricultural tractor includes a hydraulic pump which is adjustable with respect to the displacement volume for supplying pressurized hydraulic fluid, a proportional valve which is electrically actuatable, a primary hydraulic consumer to carry out a superordinate hydraulic function and to be directly connected to a conveying outlet of the hydraulic pump, a secondary hydraulic consumer to carry out a subordinate hydraulic function and to be connected to the conveying outlet of the hydraulic pump via the proportional valve, and a control unit configured to move the proportional valve into a closed valve position when the control unit recognizes that at least one of a required power of the primary and secondary hydraulic consumers exceeds the conveying capacity of the hydraulic pump and the subordinate hydraulic function of the secondary hydraulic consumer is inactive.
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公开(公告)号：US20240166256A1
公开(公告)日：2024-05-23
申请号：US18284440
申请日：2022-03-15
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Kengo TAMURA , Akihito NIBE
CPC classification number: B62D5/093 , B62D5/0475 , B62D5/063 , B62D5/075
Abstract: A steering apparatus for an industrial vehicle includes: a manual steering circuit which includes a first valve opened/closed according to an operation of a steering wheel and supplies hydraulic oil discharged from a hydraulic pump to a steering cylinder through the first valve; an automatic steering circuit which includes a second valve opened/closed according to a calculation result of automatic operation control and supplies the hydraulic oil discharged from the hydraulic pump to the steering cylinder through the second valve; and a branching valve which is disposed between the hydraulic pump and the first and second valves and branches the hydraulic oil to the manual steering circuit and the automatic steering circuit. The branching valve is a priority valve which preferentially supplies the hydraulic oil to the manual steering circuit at a designed flow rate equal to or larger than a predetermined flow rate for operating the steering cylinder.
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8.发明公开公开(公告)号：US20230415686A1
公开(公告)日：2023-12-28
申请号：US18214862
申请日：2023-06-27
Applicant: Oshkosh Corporation
Inventor： Jesse Steinke , Ryan Wolf , Chris Mills
CPC classification number: B60R16/08 , B62D5/075 , B60T13/36 , B60L50/60 , F15B15/18 , F15B19/00 , F15B1/26
Abstract: A hydraulic system includes a pump having a pump outlet, a tank configured to supply fluid to the pump, a hydraulic motor coupled to an air compressor that is configured to supply compressed air to an air brake, a steering gear having an inlet workport and an outlet workport, and a compressor bypass valve. The compressor bypass valve is selectively movable between a first position where fluid flow is provided from the pump outlet to both the hydraulic motor and the inlet workport of the steering gear and a second position where the fluid flow from the pump outlet bypasses the hydraulic motor and is supplied to the inlet workport of the steering gear.
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公开(公告)号：US09878737B2
公开(公告)日：2018-01-30
申请号：US14627887
申请日：2015-02-20
Applicant: Caterpillar Inc.
Inventor： Carl McIlheran , David A. Mork , Daniel T. Mather , Christopher W. Johnson , Michael D. Hudson
CPC classification number: B62D5/093 , B62D5/065 , B62D5/075 , F15B2211/212
Abstract: A hydraulic fluid supply portion of a hydraulic steering control system may include an accumulator holding a quantity of pressurized steering fluid, and a priority valve. The priority valve may have a priority supply inlet port fluidly connected to the accumulator for receiving pressurized steering fluid from the accumulator, and a priority supply outlet port fluidly connected to a steering flow amplifier circuit. The priority valve may have a normally open position with a minimal pressure drop between the priority supply inlet port and the priority supply outlet port, and a flow restriction position where fluid flow between the ports is restricted. A load signal line from a steering control circuit to the priority valve may bias the priority valve toward the normally open position in response to an operator steering command to provide pressurized steering fluid to the steering flow amplifier circuit.
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公开(公告)号：US20160244090A1
公开(公告)日：2016-08-25
申请号：US14627887
申请日：2015-02-20
Applicant: Caterpillar Inc.
Inventor： Carl McIlheran , David A. Mork , Daniel T. Mather , Christopher W. Johnson , Michael D. Hudson
CPC classification number: B62D5/093 , B62D5/065 , B62D5/075 , F15B2211/212
Abstract: A hydraulic fluid supply portion of a hydraulic steering control system may include an accumulator holding a quantity of pressurized steering fluid, and a priority valve. The priority valve may have a priority supply inlet port fluidly connected to the accumulator for receiving pressurized steering fluid from the accumulator, and a priority supply outlet port fluidly connected to a steering flow amplifier circuit. The priority valve may have a normally open position with a minimal pressure drop between the priority supply inlet port and the priority supply outlet port, and a flow restriction position where fluid flow between the ports is restricted. A load signal line from a steering control circuit to the priority valve may bias the priority valve toward the normally open position in response to an operator steering command to provide pressurized steering fluid to the steering flow amplifier circuit.
Abstract translation: 液压转向控制系统的液压流体供应部分可以包括保持一定数量的加压转向流体的蓄能器和优先阀。 优先阀可以具有流体地连接到蓄能器的优先供应入口端口，用于从蓄能器接收加压的转向流体，以及流体地连接到转向流量放大器电路的优先供应出口端口。 优先阀可以具有在优先供应入口和优先供应出口之间具有最小压力降的常开位置，以及限制端口之间的流体流动的流量限制位置。 从转向控制电路到优先阀的负载信号线可以响应于操作者转向命令将优先阀偏压到常开位置，以将加压的转向流体提供给转向流量放大器电路。
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