BOOM-ADJUSTABLE HORIZONTAL HYDRAULIC JACK WITH A PULL-LOCK MECHANISM

摘要

A boom-adjustable horizontal hydraulic jack with a pull-lock mechanism belongsto a liftingapparatus. The jack comprises a chassis, a hydraulic assembly, a press handle,a boom assembly,and a link rod assembly, wherein, the boom assembly comprises a bearer, aforearm, and a reararm; the link rod assembly comprises a first link rod and a second link rod;wherein, a pull-lockmechanism is additionally arranged on the bearer, and comprises a guide rodseat, a guide rod, apull handle, a guide sleeve, a steel rope, a dialing plate shaft, and alocking pin shaft, wherein,both ends of the dialing plate shaft are mounted on the bearer carrier of thebearer, a firstcompression spring, a pair of dialing plates, and a pair of dialing plateslide sleeves are arrangedon the dialing plate shaft, a second compression spring is arranged in themiddle of the lockingpin shaft, locking pins are arranged on both ends of the locking pin shaft ina slideable manner,and the locking pins are inserted in the locking pin holes of the forearm, theinner end of eachlocking pin has a dialing disk, and the outer end of each locking pin isdesigned to match withthe corresponding locking hole of the bearer carrier; a groove is arranged onthe forearm, and alimit shaft designed to match with the groove is arranged on the rear arm. Thepresent inventionhas the advantages of reasonable structure, reliable operation, easy and safeto use.