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公开(公告)号：US4039084A
公开(公告)日：1977-08-02
申请号：US266355
申请日：1972-06-26
CPC分类号： B66C23/905
摘要： A safety-guard for a crane having a boom, comprising stress-detecting means which is provided to lifting hydraulic cylinder unit for the boom so as to detect a stress applied to the cylinder unit in the direction along the axis of said unit and to give out a signal, one or more functional potentiometers which correspond to respective spans of the boom and give out safety-limit stress-reduced signals at the concerned span of the boom respectively with the movement of movable contacts that are moved in response to the vertical revolution of the boom, and a safety device which receives said signals coming from the stress-detecting means and one of the functional potentiometers corresponding to the concerned span of the boom and indicates the concerned ratio of operation of the crane or gives a warning on falling-down and/or breaking-down of the crane. Thus, operator can catch operation state of the crane with ease for a safe operation of the crane.
摘要翻译： 一种具有起重臂的起重机的安全保护装置，包括应力检测装置，该装置被设置成提升用于起重臂的液压缸单元，以便沿着所述装置的轴线方向检测施加到气缸单元的应力，并给出 输出信号，一个或多个功能电位计，其对应于悬臂的相应跨度，并且随着随着垂直旋转而移动的活动触点的运动，在臂的相关跨度处分别提供安全极限应力减小的信号 以及安全装置，其接收来自应力检测装置的信号和对应于悬臂的相关跨度的功能电位器之一，并指示起重机的有效比例或给出起落架的警告， 起重机的下降和/或分解。 因此，操作者可以容易地捕捉起重机的操作状态，以便起重机的安全操作。
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公开(公告)号：US4058178A
公开(公告)日：1977-11-15
申请号：US650290
申请日：1976-01-19
CPC分类号： B66C23/905
摘要： A hydraulic cylinder unit which comprises a cylinder, a piston slidably inserted in the cylinder in a fluid-tight manner, and a piston rod connected to the piston at one end thereof and projected outwardly from the cylinder and which is operated to extend the piston rod by a fluid supplied under pressure into one chamber in the cylinder and to retract the piston rod by a mechanical force applied to the piston or piston rod (single-acting type) or by a fluid supplied under pressure into the other chamber in the cylinder (double-acting type) is used for lifting, transporting or displacing a material in various industries. In the use of such hydraulic cylinder unit, load in the axial direction of the unit is applied to the cylinder unit by a load or material carried on operated by the cylinder unit or the piston rod thereof and detection of such load is often required. This load is detected by a strain gauge mounted in the piston rod.
摘要翻译： 一种液压缸单元，其包括气缸，以流体密封方式可滑动地插入气缸中的活塞和在其一端连接到活塞并从气缸向外突出的活塞杆，该活塞杆被操作以使活塞杆 通过在压力下供应的流体在气缸中的一个室中，并且通过施加到活塞或活塞杆（单作用型）上的机械力或通过在压力下供给到气缸中的另一个室中的流体来缩回活塞杆（ 双作用型）用于提升，运输或替代各行业的材料。 在使用这种液压缸单元时，通过由气缸单元或其活塞杆操作的负载或材料将单元的轴向负载施加到气缸单元，并且经常需要检测这种负载。 该负载由安装在活塞杆上的应变仪检测。
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公开(公告)号：US4059196A
公开(公告)日：1977-11-22
申请号：US666381
申请日：1976-03-12
CPC分类号： E02F9/2008 , E02F9/2221
摘要： A system for controlling a power shovel for use in civil engineering works is described. The control system comprises a manual control lever consisting of a control boom, a control arm and a control bucket which are miniature of a boom, an arm and a bucket of the power shovel, and a control circuit. The control circuit includes means for detecting the displacement of the elements of the control lever, means for detecting the displacement of the elements of the power shovel, means for comparing the displacement of the control lever with one of the power shovel. The differential signal from the circuit is applied to servo-mechanisms for following up the power shovel in accordance with the movement of the control lever. The power shovel can be controlled equally with the manual control lever.
摘要翻译： 描述了一种用于控制用于土木工程的铲土机的系统。 控制系统包括手动控制杆，其由铲斗的起重臂，臂和铲斗的微型控制臂，控制臂和控制铲斗组成，以及控制电路。 控制电路包括用于检测控制杆的元件的位移的装置，用于检测铲斗的元件的位移的装置，用于将控制杆的位移与铲斗之一进行比较的装置。 来自电路的差分信号被施加到伺服机构，用于根据控制杆的移动跟踪铲斗。 电铲可以通过手动控制杆同样的控制。
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