Hydraulic emergency hydraulic drive system of road paving machine

摘要

PROBLEM TO BE SOLVED: To solve the problem of being unable to connect a conventional emergency escaping device to a hydraulic construction machine of traveling by a travel system hydraulic unit of constituting a hydraulic circuit of a closed circuit.;SOLUTION: When the hydraulic construction machine 21 has the travel system hydraulic circuit constituted of the closed circuit, when the hydraulic construction machine 21 and an emergency hydraulic driving device 1 are connected via first pressure oil connecting ports of pressure oil connecting ports 7a and 7b, a hydraulic closed circuit is constituted between traveling HST motors 22a and 22b and an HST pump 3. When the hydraulic construction machine has the travel system hydraulic circuit constituted of an opening circuit, when the hydraulic construction machine and the emergency hydraulic driving device 1 are connected via second pressure oil connecting ports of pressure oil connecting ports 9a and 9b, a hydraulic opening circuit is constituted between a traveling motor and a hydraulic pump 5.;COPYRIGHT: (C)2013,JPO&INPIT