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    • 1. 发明公开
    • TRANSPORTATION VEHICLE
    • TRANSPORTFAHRZEUG
    • EP2565076A1
    • 2013-03-06
    • EP11774743.6
    • 2011-03-29
    • Hitachi Construction Machinery Co., Ltd.
    • TAMURA KatsumiMINOSHIMA ToshikazuFUSHIKI MichioKUROSAWA Takao
    • B60P1/16F15B11/00F15B11/04
    • B60P1/162F15B11/042F15B11/044F15B2211/3116F15B2211/351F15B2211/353F15B2211/6313F15B2211/6336F15B2211/665F15B2211/7107F15B2211/755F15B2211/853Y10T137/0971
    • A control valve device (16) comprises two direction control valves (20) and (21). The direction control valve (20) includes an expansion side variable throttle portion (20C) and a contraction side variable throttle portion (20D). The direction control valve (21) includes an expansion side variable throttle portion (21C) and a contraction side variable throttle portion (21D). When a hoist cylinder (10) is telescopically operated to raise or lower a vessel (3), as the hoist cylinder (10) approaches a stop position, a controller (35) determines that the hoist cylinder (10) gets close to the stop position. Based upon this determination, the controller (35) variably adjusts a flow passage area of the direction control valve (20) using the variable throttle portions (20C) and (20D) or variably adjusts a flow passage area of the direction control valve (21) using the variable throttle portions (21C) and (21D) in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder (10) corresponding to the weight in the side of vessel (3).
    • 控制阀装置(16)包括两个方向控制阀(20)和(21)。 方向控制阀(20)包括膨胀侧可变节流部(20C)和收缩侧可变节流部(20D)。 方向控制阀(21)包括膨胀侧可变节流部(21C)和收缩侧可变节流部(21D)。 当提升气缸(10)可伸缩地操作以升高或降低容器(3)时,当提升气缸(10)接近停止位置时,控制器(35)确定提升气缸(10)接近停止 位置。 基于该判断,控制器(35)使用可变节流部(20C)和(20D)可变地调整方向控制阀(20)的流路面积,或者可变地调整方向控制阀(21)的流路面积 )以与减轻或加快对应于容器(3)一侧的重量的起重气缸(10)的伸缩速度的方式,使用可变节流部分(21C)和(21D)。
    • 2. 发明公开
    • CONVEYING VEHICLE
    • FÖRDERFAHRZEUG
    • EP2527198A1
    • 2012-11-28
    • EP10843956.3
    • 2010-12-09
    • Hitachi Construction Machinery Co., Ltd.
    • MINOSHIMA ToshikazuFUSHIKI MichioTAMURA KatsumiKUROSAWA Takao
    • B60P1/16B60P1/04F15B11/00
    • B60P1/162
    • In case a burden is discharged from a vessel (3), the vessel (3) is raised obliquely backward with respect to a vehicle body (2) by a hoist cylinder (10). However, when discharging work is stopped on the way, the vessel (3) is temporarily lowered to a position at which this sits on the vehicle body (2). When the vessel (3) lowers, a weight of the burden left loaded thereon acts on the hoist cylinder (10) as a load in addition to the weight of the vessel (3). A controller (35) determines whether the vessel (3) lowers in a burden loading state based on various detection signals. When the vessel (3) lowers in the burden loading state, switching of directional control valves (20) and (21) is controlled so as to decrease a contracting speed of the hoist cylinder (10), thereby prevent the vessel (3) from colliding against the vehicle body (2).
    • 在从船舶(3)排出负荷的情况下,通过提升缸(10),容器(3)相对于车身(2)向后倾斜。 然而,当在途中停止排放作业时,容器(3)暂时下降至位于车体(2)上的位置。 当容器(3)降低时,除了容器(3)的重量之外,其负载的负担的重量作为负载作用在起重缸(10)上。 控制器(35)基于各种检测信号确定容器(3)是否在负担加载状态下降。 当容器(3)在负载装载状态下降时,控制方向控制阀(20)和(21)的切换,以降低起重缸(10)的收缩速度,从而防止容器(3)从 与车体(2)碰撞。