公开(公告)号：US09206821B2

公开(公告)日：2015-12-08

申请号：US13320980

申请日：2010-05-11

Applicant: Karl-Heinz Post ,  Robert Weber

Inventor： Karl-Heinz Post ,  Michael N. Wheeler ,  Richard G. Wheeler, Sr. ,  Robert Weber

IPC: F15B11/00 ,  F15B13/04 ,  F15B13/042 ,  F15B13/043

CPC classification number: F15B11/006 ,  F15B13/0405 ,  F15B13/0426 ,  F15B13/043 ,  F15B2211/20546 ,  F15B2211/30505 ,  F15B2211/30575 ,  F15B2211/7053 ,  Y10T137/8593

Abstract: A hydraulic switching mechanism for the mobile hydraulics of, for example, hydraulic excavators, with a valve block, with electrohydraulically activatable valve units for controlling the movement of a working cylinder whose cylinder chambers can be selectively connected to a pump connection for hydraulic fluid, to a tank connection or to one another, and with pre-control valves for activating the valve units, wherein the hydraulic switching mechanism, by means of separate tank valve units and pump valve units, and also a suitable pre-control system, makes it possible to achieve a directional control valve function and a directly controlled and superimposed pre-controlled lowering braking function, a maximum pressure safeguarding of the cylinders and a proportional throttle valve function for the controlled displacement under negative load forces in the direction of movement and braking in an emergency; and mobile hydraulic machines having such a hydraulic switching mechanism and also to valve units therefor.

Abstract translation: 一种用于例如具有阀块的液压挖掘机的移动液压装置的液压切换机构，其具有用于控制其气缸室可选择性地连接到用于液压流体的泵连接的工作缸的运动的电液可激活阀单元， 罐连接或彼此连接，并具有用于启动阀单元的预控制阀，其中液压切换机构通过单独的油箱阀单元和泵阀单元以及合适的预控制系统使得可能 实现方向控制阀功能和直接控制和叠加的预控降低制动功能，对气缸的最大压力保护和用于在负载力下的受控位移的比例节气门功能在运动和制动方向上 紧急情况 以及具有这种液压切换机构的移动式液压机械及其阀单元。