公开(公告)号：US07607381B2

公开(公告)日：2009-10-27

申请号：US10538697

申请日：2003-12-08

申请人： Wolfgang Kauss ,  Frederic Lamarche

发明人： Wolfgang Kauss ,  Frederic Lamarche

IPC分类号： E02F3/43 ,  F15B11/20

CPC分类号： F15B11/003 ,  E02F3/432 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/20 ,  F15B2211/50545

摘要： On a work appliance, an extension arm is held rotatably, and a scoop is held rotatably on the extension arm. Actuation of the extension arm and of the scoop is by means of hydraulic cylinders. Each cylinder is assigned a valve which controls the flow of pressure medium from a pump to the cylinder and from the latter to the tank. A rotational movement of the extension arm is accomplished with the top edge of the scoop maintaining its angular position when the extension arm is being raised or lowered. Valves which control the flow of pressure medium to the cylinders are activated with the ratio of the pressure medium quantities supplied to the cylinders being kept at a constant value independently of the size of the control signal controlling the flow of pressure medium to a cylinder for the actuation of the extension arm.

摘要翻译： 在工作器具上，延伸臂可旋转地保持，并且勺子可旋转地保持在延伸臂上。 延伸臂和铲斗的启动是通过液压缸。 每个气缸都配有一个阀门，该阀门控制压力介质从泵到气缸的流动，并从后者到罐。 当延伸臂被升高或降低时，延伸臂的旋转运动由铲斗的顶部边缘保持其角度位置来实现。 控制压力介质到气缸的流量的阀被激活，提供给气缸的压力介质的量保持在恒定值，与控制信号的大小无关，控制信号的大小控制压力介质流向气缸的压力 延伸臂的致动。

公开(公告)号：US20070169620A1

公开(公告)日：2007-07-26

申请号：US10538697

申请日：2003-12-08

申请人： Wolfgang Kauss ,  Frederic Lamarche

发明人： Wolfgang Kauss ,  Frederic Lamarche

IPC分类号： F15B11/00

CPC分类号： F15B11/003 ,  E02F3/432 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/20 ,  F15B2211/50545

摘要： On a work appliance, an extension arm is held rotatably, and a scoop is held rotatably on the extension arm. The actuation of the extension arm and of the scoop takes place in each case by means of a hydraulic cylinder. Each cylinder is assigned a valve which controls the flow of pressure medium from a pump to the cylinder and from the latter to the tank. A rotational movement of the extension arm entails a change in the angular position of the top edge of the scoop, this change having an adverse effect during the raising of the extension arm, particularly when the scoop is full. So that the top edge of the scoop maintains its angular position when the extension arm is being raised or lowered, the valves which control the flow of pressure medium to the cylinders can be activated in such a way that the ratio of the pressure medium quantities supplied to the cylinders is kept at a constant value independently of the size of the control signal controlling the flow of pressure medium to the cylinder for the actuation of the extension arm. The invention can be used advantageously in wheeled loaders, particularly in those wheeled loaders which are of simple construction.

摘要翻译： 在工作器具上，延伸臂可旋转地保持，并且勺子可旋转地保持在延伸臂上。 在每种情况下，通过液压缸进行延伸臂和铲斗的致动。 每个气缸都配有一个阀门，该阀门控制压力介质从泵到气缸的流动，并从后者到罐。 延伸臂的旋转运动需要铲斗的顶部边缘的角位置的变化，这种变化在伸展臂升高期间具有不利影响，特别是当铲斗满时。 因此，当延伸臂被升高或降低时，铲斗的顶部边缘保持其角度位置，可以以这样一种方式激活控制压力介质到气缸的流动的阀门，使得提供的压力介质量的比例 与控制信号的大小无关地将气缸保持在恒定值，该控制信号控制用于促动伸展臂的气缸的压力介质的流动。 本发明可有利地用于轮式装载机，特别是在结构简单的轮式装载机中。