Energy recovering method and system in hydraulic lift device of battery operated industrial trucks
    1.
    发明授权
    Energy recovering method and system in hydraulic lift device of battery operated industrial trucks 有权
    电动工业卡车液压升降装置能量回收方法及系统

    公开(公告)号:US07770697B2

    公开(公告)日:2010-08-10

    申请号:US11663534

    申请日:2006-02-13

    IPC分类号: B66F9/22 F15B21/14 F16D31/02

    摘要: An energy recovering system in a hydraulic lift device of a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, occurrence of pressure pulsation in the working oil can be prevented, and energy recovering efficiency is increased. The hydraulic lift device comprises a lift cylinder (1) for lifting a fork F, an electric motor (4) rotated by power supply from a battery (5), a hydraulic pump (3) for supplying pressurized oil to the lift cylinder (1), a control valve (14) disposed in a pressurized oil supply path (23), and a controller (17). The controller (17) controls the opening of the control valve (14) and rotation speed of the electric motor (4) which functions as an electric generator driven by the hydraulic pump (3) rotated by the action of the pressurized oil returning from the lift cylinder (1) when a load is lowered so that the generated electricity charges the battery (5) to recover the potential energy of the load.

    摘要翻译: 电动工业车辆液压升降装置中的能量回收系统。 利用该系统,可以通过液压提升装置进行能量回收操作,将其加工到其他液压致动器,能够防止工作油中的压力脉动的发生,能量回收效率提高。 液压提升装置包括用于提升叉F的提升缸(1),通过从电池(5)供电而旋转的电动马达(4),用于向提升缸(1)供应加压油的液压泵 ),设置在加压供油路径(23)中的控制阀(14)和控制器(17)。 控制器(17)控制控制阀(14)的打开和作为由液压泵(3)驱动的发电机起作用的电动机(4)的旋转速度,其通过从 提升气缸(1),以使得发电对电池(5)充电以恢复负载的势能。

    Energy recovering system of hydraulic lift device for battery operated industrial trucks
    2.
    发明授权
    Energy recovering system of hydraulic lift device for battery operated industrial trucks 有权
    电动工业卡车液压升降装置能量回收系统

    公开(公告)号:US07770696B2

    公开(公告)日:2010-08-10

    申请号:US11663352

    申请日:2006-02-15

    IPC分类号: B66F9/22 F15B21/14 F16D31/02

    摘要: An energy recovering system of a hydraulic lift device for a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, and energy recovering efficiency is increased. A hydraulic motor (6) is disposed in a fluid path for recovering pressurized working fluid from a lift cylinder (1) via a control valve (10) to a working fluid reservoir tank (8) so that the hydraulic motor (6) is driven by the pressurized working fluid returning from the lift cylinder (1). The hydraulic motor (6) is connected to an electric motor (4) for driving a hydraulic pump (3), which supplies pressurized fluid to the lift cylinder (1), by means of a one-way clutch (7) which performs torque transmission only from the hydraulic motor (6) to the electric motor (4).

    摘要翻译: 一种用于电池操作的工业车辆的液压提升装置的能量回收系统。 使用该系统,可以通过液压提升装置进行能量回收操作,而将工作油供给到其他液压致动器,并且能量回收效率提高。 液压马达(6)设置在流体路径中,用于通过控制阀(10)从提升缸(1)回收加压工作流体到工作流体储存罐(8),使得液压马达(6)被驱动 通过从提升缸(1)返回的加压工作流体。 液压马达(6)连接到用于驱动液压泵(3)的电动马达(4),该液压泵通过执行扭矩的单向离合器(7)向提升缸(1)供应加压流体 仅从液压马达(6)到电动马达(4)的传动。

    Energy Recovering Method and System in Hydraulic Lift Device of Battery Operated Industrial Trucks
    3.
    发明申请
    Energy Recovering Method and System in Hydraulic Lift Device of Battery Operated Industrial Trucks 有权
    电动工业卡车液压升降装置能量回收方法及系统

    公开(公告)号:US20080128214A1

    公开(公告)日:2008-06-05

    申请号:US11663534

    申请日:2006-02-13

    IPC分类号: B66F9/20 B66F9/22 B66F9/24

    摘要: An energy recovering system in a hydraulic lift device of a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, occurrence of pressure pulsation in the working oil can be prevented, and energy recovering efficiency is increased. The hydraulic lift device comprises a lift cylinder (1) for lifting a fork F, an electric motor (4) rotated by power supply from a battery (5), a hydraulic pump (3) for supplying pressurized oil to the lift cylinder (1), a control valve (14) disposed in a pressurized oil supply path (23), and a controller (17). The controller (17) controls the opening of the control valve (14) and rotation speed of the electric motor (4) which functions as an electric generator driven by the hydraulic pump (3) rotated by the action of the pressurized oil returning from the lift cylinder (1) when a load is lowered so that the generated electricity charges the battery (5) to recover the potential energy of the load.

    摘要翻译: 电动工业车辆液压升降装置中的能量回收系统。 利用该系统,可以通过液压提升装置进行能量回收操作,将其加工到其他液压致动器,能够防止工作油中的压力脉动的发生,能量回收效率提高。 液压提升装置包括用于提升叉F的提升缸(1),通过从电池(5)供电而旋转的电动马达(4),用于向提升缸(1)供应加压油的液压泵 ),设置在加压供油路径(23)中的控制阀(14)和控制器(17)。 控制器(17)控制控制阀(14)的打开和作为由液压泵(3)驱动的发电机起作用的电动机(4)的旋转速度,其通过从 提升气缸(1),以使得发电对电池(5)充电以恢复负载的势能。