OPERATION UNIT PROVIDED BETWEEN HYDRAULIC CONSTRUCTION MACHINE AND EMERGENCY ESCAPE HYDRAULIC UNIT

摘要

PROBLEM TO BE SOLVED: To provide an emergency escape unit which moves a hydraulic construction machine when a failure occurs in a running system hydraulic unit during operation of the hydraulic construction machine.

SOLUTION: An operation unit 31 is connected between a machine side connection part Q1 for running and a hydraulic unit side connection part P1, to form an emergency hydraulic open circuit for running is formed among an emergency escape hydraulic pump 12, a hydraulic motor 42 for running, and a flow control valve 33. The flow rate of pressure oil flowing in the formed emergency hydraulic open circuit for running is controlled by the flow control valve 33, and the running of an asphalt finisher 1 is controlled. An emergency escape hydraulic unit 11 is used for emergency running of the asphalt finisher 1 equipped with a hydraulic close circuit for running.

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