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    • 9. 发明申请
    • Hydraulic circuit to prevent bucket separation from bucket rest during traveling of heavy equipment
    • 液压回路,用于在重型设备行驶期间防止铲斗与斗环分离
    • US20080229738A1
    • 2008-09-25
    • US12075590
    • 2008-03-12
    • Byung Ho Lee
    • Byung Ho Lee
    • F15B13/01
    • E02F9/2239F15B2211/20576F15B2211/30505F15B2211/3116F15B2211/329F15B2211/40515F15B2211/41518F15B2211/41554F15B2211/428F15B2211/45F15B2211/7142F15B2211/781
    • A hydraulic circuit is provided, which can prevent the bucket from being separated from the bucket rest by preventing a change of stroke of a boom cylinder or an arm cylinder during long traveling of wheel type heavy equipment, and can secure safety since it is not required for an operator to adjust the position of a working device like boom and arm. The hydraulic circuit includes first and second hydraulic pumps, a boom cylinder, an arm cylinder, a boom confluence logic valve, a first port formed to connect with a large chamber of the boom cylinder in a housing in which a spool for the boom cylinder is shiftably installed, a second port formed to connect with a hydraulic tank in the housing, and a first orifice formed between the housing and a land part of the spool for the boom cylinder located between the first port and the second port. During long traveling of the heavy equipment, a very small amount of hydraulic fluid fed from the second hydraulic pump to the large chamber of the boom cylinder drains to the hydraulic tank through the first orifice to prevent a change of stroke of the boom cylinder.
    • 提供了一种液压回路,其可以通过在轮式重型设备的长时间行驶期间防止动臂缸或手臂缸的行程改变来防止铲斗与斗架分离,并且可以确保安全性,因为不需要 用于操作者调节工作装置如吊杆和手臂的位置。 液压回路包括第一和第二液压泵,动臂缸,臂缸,悬臂汇流逻辑阀,形成为与动臂缸的大腔连接的壳体中的第一端口,其中用于动臂缸的阀芯为 可移动地安装有形成为与壳体中的液压箱连接的第二端口,以及形成在壳体和位于第一端口和第二端口之间的动臂缸的线轴的陆部的第一孔口。 在重型设备的长时间行进中,从第二液压泵供给到动臂缸的大腔的非常少量的液压流体通过第一孔排入液压缸,以防止动臂缸的行程改变。