PNEUMATIC LOCK DEVICE FOR SWING OF CRANE

摘要

A pneumatic swing lock device for crane is provided to fix the upper swiveling body and the lower vehicle body firmly with the pneumatic pressure of the break line and to facilitate the manipulation by using a switch. A pneumatic swing lock device for crane comprises a switch installed within a driver's cabin of an upper swiveling body(5), a solenoid valve which is operated with the switch and is connected to an air tank of a brake line, an air cylinder(1) which is connected to the solenoid valve and is fixed on one side of the upper swiveling body with a bracket, and a lock pin(2) connected to the air cylinder and inserted in a fixing bracket(9) installed on the lower vehicle body.