Hydraulic volume flow control device for at least one loaded working machine or device, uses out-flowing volume to generate force acting on pilot valve body in the closure direction

摘要

Safety in control devices for hydraulic volume flow of loaded working machines and devices can be increased by application of integrated load over-compensation, e.g. in a large capacity forklift truck, for achieving particularly slow lowering of loads and prevention of tilting or rocking of the forklift machine. In addition to greater safety the working device can be used for greater loads, such as by using a working cylinder of increased loaded capacity. For load compensation, an out-flowing volume (36) generates a force acting on the pilot valve body (32) in the closure direction (42); this force increasing with increasing loading of the working device (12).