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公开(公告)号：US09021796B2
公开(公告)日：2015-05-05
申请号：US14114963
申请日：2013-05-20
Applicant: Komatsu Ltd.
Inventor： Takuya Uemura , Yasuhiko Takeuchi
CPC classification number: F15B21/042 , B66C23/44 , B66C23/76 , B66D1/44 , F15B2211/41554 , F15B2211/62 , F15B2211/7058 , Y10S60/905
Abstract: A pipelayer includes a pilot pressure control unit. The pilot pressure control unit supplies hydraulic fluid to a pilot port of a warm-up control valve so that the warm-up control valve enters an open state when a winch control valve is in the closed state. The pilot pressure control unit drains hydraulic fluid from the pilot port of the warm-up control valve so that the warm-up control valve enters the closed state when the winch control valve is in the open state. The stroke amount from the stroke end of the closed side of the spool of the warm-up control valve when the meter-out opening of the warm-up control valve is fully closed is larger than the stroke amount from the stroke end of the closed side of the spool of the winch control valve when the meter-in opening of the winch control valve is fully closed.
Abstract translation: 管道铺设机包括先导压力控制单元。 先导压力控制单元将液压流体供给到预热控制阀的先导端口，使得当绞车控制阀处于关闭状态时，预热控制阀进入打开状态。 先导压力控制单元从预热控制阀的先导端口排出液压流体，使得当绞车控制阀处于打开状态时，预热控制阀进入关闭状态。 当预热控制阀的出口打开完全关闭时，预热控制阀的阀芯的封闭侧的行程末端的行程量大于从关闭的行程末端的行程量 当绞盘控制阀的进入开启完全关闭时，绞盘控制阀的阀芯侧面。
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公开(公告)号：US09617126B2
公开(公告)日：2017-04-11
申请号：US14348675
申请日：2013-10-31
Applicant: KOMATSU LTD.
Inventor： Takuya Uemura , Yasuhiko Takeuchi , Hiroki Yamamoto , Kazumasa Teramoto
Abstract: A restraining roller of a hook winch has a roller middle part and first and second roller end parts. The roller middle part is formed in a columnar shape. Each of the first and second roller end parts is formed in a roughly circular truncated cone shape. The widths of the first and second roller end parts are greater than the diameter of a wire rope. A difference in diameter between an inner end and outer end of each of the first and second roller end parts is less than the diameter of the wire rope. Taper angles of the first and second roller end parts are different from each other.
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公开(公告)号：US20140338317A1
公开(公告)日：2014-11-20
申请号：US14114963
申请日：2013-05-20
Applicant: KOMATSU LTD.
Inventor： Takuya Uemura , Yasuhiko Takeuchi
IPC: F16L1/024
CPC classification number: F15B21/042 , B66C23/44 , B66C23/76 , B66D1/44 , F15B2211/41554 , F15B2211/62 , F15B2211/7058 , Y10S60/905
Abstract: A pipelayer includes a pilot pressure control unit. The pilot pressure control unit supplies hydraulic fluid to a pilot port of a warm-up control valve so that the warm-up control valve enters an open state when a winch control valve is in the closed state. The pilot pressure control unit drains hydraulic fluid from the pilot port of the warm-up control valve so that the warm-up control valve enters the closed state when the winch control valve is in the open state. The stroke amount from the stroke end of the closed side of the spool of the warm-up control valve when the meter-out opening of the warm-up control valve is fully closed is larger than the stroke amount from the stroke end of the closed side of the spool of the winch control valve when the meter-in opening of the winch control valve is fully closed.
Abstract translation: 管道铺设机包括先导压力控制单元。 先导压力控制单元将液压流体供给到预热控制阀的先导端口，使得当绞车控制阀处于关闭状态时，预热控制阀进入打开状态。 先导压力控制单元从预热控制阀的先导端口排出液压流体，使得当绞车控制阀处于打开状态时，预热控制阀进入关闭状态。 当预热控制阀的出口打开完全关闭时，预热控制阀的阀芯的封闭侧的行程末端的行程量大于从关闭的行程末端的行程量 当绞盘控制阀的进入开启完全关闭时，绞盘控制阀的阀芯侧面。
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