利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

34 条记录 (耗时 0.012 秒)

    DOUBLE ACTING HITCH HYDRAULIC VALVE ASSEMBLY
    1.
    发明公开
    DOUBLE ACTING HITCH HYDRAULIC VALVE ASSEMBLY 审中-公开

    公开(公告)号：US20240360848A1

    公开(公告)日：2024-10-31

    申请号：US18498518

    申请日：2023-10-31

    申请人： Deere & Company

    发明人： Michael A. Holland

    IPC分类号： F15B11/028 ,  B60D1/62

    CPC分类号： F15B11/028 ,  B60D1/62 ,  F15B2211/3056 ,  F15B2211/50509

    摘要： One or more techniques and/or systems are disclosed for a hydraulic system that is used with a vehicle hitch, to raise and lower an implement attached to the hitch. The system has a lifting side, that raises the hitch, and a downforce side that applies downward pressure. Hydraulic actuators are used to apply the up or down force using supply lines coupled to both sides. A downforce pressure control valve controls an amount of hydraulic pressure is supplied to the downforce side. A mode select valve is fluidly coupled to the downforce pressure control valve and is used to select hitch operation between a double acting hitch position, a single acting hitch position, and a neutral position. A work port check valve is between the downforce side and the mode select valve to stop the fluid from flowing back into the system when de-energized or in the neutral position.

    Hydraulic system having low speed operation
    2.
    发明授权
    Hydraulic system having low speed operation 有权
    液压系统低速运行

    公开(公告)号：US09366272B2

    公开(公告)日：2016-06-14

    申请号：US13963150

    申请日：2013-08-09

    申请人： Caterpillar Inc.

    发明人： Susan E. Bieker ,  Eric P. Jakubiak ,  Dennis R. Barber ,  John J. Kaufman ,  Edward W. Mate ,  Scott D. Vollmer ,  Michael D. Hudson ,  Moses I. Akpan

    IPC分类号： F15B15/02 ,  E02F9/08 ,  E02F9/22 ,  F16H61/433 ,  F16H61/465 ,  F01P7/04

    CPC分类号： F15B15/02 ,  E02F9/0866 ,  E02F9/0875 ,  E02F9/226 ,  F01P7/044 ,  F15B2211/40515 ,  F15B2211/40592 ,  F15B2211/41581 ,  F15B2211/46 ,  F15B2211/50509 ,  F15B2211/605 ,  F16H61/433 ,  F16H61/465

    摘要： A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve.

    摘要翻译： 提供液压风扇电路。 液压风扇回路包括油箱，具有流体入口和流体出口的马达和用于从罐中抽取低压的流体并经由流体入口将流体以升高的压力排出到马达的泵。 液压风扇回路还包括设置在电动机的流体出口和罐之间的方向控制阀。 方向控制阀可操作以在阻流位置和流动通过位置之间移动。 此外，方向控制阀被配置为将电动机的正转速降低到通过控制泵输出可获得的最低正向速度。 此外，液压风扇回路包括压力控制回路，该压力控制回路构造成在变化的压力下提供先导流体流动以移动方向控制阀。

    HYDRAULIC CIRCUIT FOR HEAVY EQUIPMENT
    3.
    发明申请
    HYDRAULIC CIRCUIT FOR HEAVY EQUIPMENT 有权
    液压电路重型设备

    公开(公告)号：US20090094973A1

    公开(公告)日：2009-04-16

    申请号：US12246515

    申请日：2008-10-07

    申请人： Hae Kyun CHEONG

    发明人： Hae Kyun CHEONG

    IPC分类号： F15B13/06

    CPC分类号： F15B11/17 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2292 ,  E02F9/2296 ,  F15B21/042 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/41509 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/50509 ,  F15B2211/575 ,  F15B2211/6343 ,  F15B2211/6355 ,  F15B2211/66 ,  F15B2211/7142

    摘要： A hydraulic circuit for heavy equipment is disclosed, which utilizes a hydraulic fluid supplied from a hydraulic pump for driving a cooling fan, as a pilot signal pressure, without installing a separate constant displacement pilot pump for supplying the pilot signal pressure to a control valve for controlling the hydraulic fluid to be supplied to a working device such as a boom. The hydraulic circuit includes first to third hydraulic pumps connected to an engine; a first control valve installed in a flow path of the first hydraulic pump; a second control valve installed in a flow path of the second hydraulic pump; a hydraulic motor connected to the third hydraulic pump; a cooling fan, connected to the hydraulic motor, for discharging cooling wind to an oil cooler; a temperature sensor for detecting a temperature of the hydraulic fluid in the hydraulic tank; an electric relief valve, installed in a drain flow path of the third hydraulic pump, for variably controlling a rotation velocity of the cooling fan; a controller for controlling the hydraulic pressure that drives the hydraulic motor; and a pilot pressure generator, installed in a pilot flow path branched and connected to a flow path of the third hydraulic pump, for supplying a pilot signal pressure to the first and second control valves when shifting.

    摘要翻译： 公开了一种用于重型设备的液压回路，其利用从液压泵供应的用于驱动冷却风扇的液压流体作为先导信号压力，而不安装单独的恒定位移先导泵，以将先导信号压力提供给控制阀， 控制要供应到诸如吊杆的工作装置的液压流体。 液压回路包括连接到发动机的第一至第三液压泵; 安装在第一液压泵的流路中的第一控制阀; 安装在所述第二液压泵的流路中的第二控制阀; 连接到第三液压泵的液压马达; 冷却风扇，连接到液压马达，用于将冷却风排放到油冷却器; 温度传感器，用于检测液压缸中的液压流体的温度; 安装在所述第三液压泵的排水流路中的电气安全阀，用于可变地控制所述冷却风扇的转速; 用于控制驱动液压马达的液压的控制器; 以及先导式压力发生器，其安装在分支并连接到第三液压泵的流路的先导流路中，用于当换档时向第一和第二控制阀提供先导信号压力。

    METHOD FOR CONTROLLING A COMBINED ROTARY/PUSH MOVEMENT
    6.
    发明申请
    METHOD FOR CONTROLLING A COMBINED ROTARY/PUSH MOVEMENT 有权
    用于控制组合式旋转/推动运动的方法

    公开(公告)号：US20160052760A1

    公开(公告)日：2016-02-25

    申请号：US14830837

    申请日：2015-08-20

    申请人： JUNGHEINRICH AKTIENGESELLSCHAFT

    发明人： Bernhard HAGL

    IPC分类号： B66F9/22 ,  F15B11/00 ,  F15B11/16

    CPC分类号： B66F9/22 ,  B66F9/07 ,  B66F9/147 ,  F15B11/003 ,  F15B11/161 ,  F15B2211/50509

    摘要： The invention relates to a method and device for controlling a combined rotary/push movement of a load-receiving means of an industrial truck, in particular a three-way stacker, both the rotary movement and the push movement being brought about by means of respective hydraulic elements (32, 34), which are supplied with hydraulic fluid by a single hydraulic pump (22) which is driven by an associated pump motor (24), and a performance characteristic of the hydraulic pump (22) being controlled according to a predetermined progression over time during the rotary/push movement; the industrial truck comprising a valve assembly (30) which is designed to be operated such that, below a threshold value for the hydraulic pressure provided by the hydraulic pump (22), only the rotary movement of the load-receiving means is brought about, while, above the threshold value, both the rotary movement and the push movement are brought about. Here, sensor means (36a, 36b) are provided which detect a temperature of the pump motor (24) and/or of the hydraulic pump (22), and the predetermined progression over time of the performance characteristic of the hydraulic pump (22) during the rotary/push movement is adapted according to a predetermined relationship depending on the temperature of the pump motor (24) and/or of the pump (22) detected by the sensor means (36a, 36b).

    摘要翻译： 本发明涉及一种用于控制工业车辆的负载接收装置，特别是三向堆垛机的组合的旋转/推动运动的方法和装置，旋转运动和推动运动都通过相应的 液压元件（32,34），其由通过相关联的泵马达（24）驱动的单个液压泵（22）供应液压流体，并且液压泵（22）的性能特性根据 在旋转/推动运动期间随时间的预定进展; 所述工业用卡车包括阀组件（30），所述阀组件被设计成被操作为使得低于由所述液压泵（22）提供的液压的阈值以下仅引起所述负载接收装置的旋转运动， 而在阈值以上时，会产生旋转运动和推动运动。 这里，设置有检测泵电动机（24）和/或液压泵（22）的温度的传感器装置（36a，36b），并且随着液压泵（22）的性能特性的预定进度， 根据由所述传感器装置（36a，36b）检测到的所述泵电动机（24）和/或所述泵（22）的温度，根据预定的关系来适配所述旋转/推动运动。

    HYDRAULIC SYSTEM HAVING LOW SPEED OPERATION
    7.
    发明申请
    HYDRAULIC SYSTEM HAVING LOW SPEED OPERATION 有权
    具有低速运行的液压系统

    公开(公告)号：US20150040548A1

    公开(公告)日：2015-02-12

    申请号：US13963150

    申请日：2013-08-09

    申请人： Caterpillar Inc.

    发明人： Susan E. Bieker ,  Eric P. Jakubiak ,  Dennis R. Barber ,  John J. Kaufman ,  Edward W. Mate ,  Scott D. Vollmer ,  Michael D. Hudson ,  Moses I. Akpan

    IPC分类号： F15B15/02

    CPC分类号： F15B15/02 ,  E02F9/0866 ,  E02F9/0875 ,  E02F9/226 ,  F01P7/044 ,  F15B2211/40515 ,  F15B2211/40592 ,  F15B2211/41581 ,  F15B2211/46 ,  F15B2211/50509 ,  F15B2211/605 ,  F16H61/433 ,  F16H61/465

    摘要： A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve.

    摘要翻译： 提供液压风扇电路。 液压风扇回路包括油箱，具有流体入口和流体出口的马达和用于从罐中抽取低压的流体并经由流体入口将流体以升高的压力排出到马达的泵。 液压风扇回路还包括设置在电动机的流体出口和罐之间的方向控制阀。 方向控制阀可操作以在阻流位置和流动通过位置之间移动。 此外，方向控制阀被配置为将电动机的正转速降低到通过控制泵输出可获得的最低正向速度。 此外，液压风扇回路包括压力控制回路，该压力控制回路构造成在变化的压力下提供先导流体流动以移动方向控制阀。