HYDRAULIC TORQUE WRENCH WITH STACKED DRIVE PLATE CARTRIDGE, MULTIPLE CARTRIDGE PAWLS AND SNAP-IN RETRACT LOCK

摘要

Drive plates of a hydraulic torque wrench are stacked and mating combined in a cartridge for extended surface contact within the ratchet teeth width of the joints along the piston force transmission path into the drive plates and into the cartridge pawls. A snap-in retract lock provides for an easy connect with the cartridge also in case of a rotationally coupled modular torque wrench. There, the stacked and mated drive plates are rotationally guided in the housing leaving the ratchet wheel peripherally clear for maximum housing support. The pawls interface the ratchet teeth with contact pressures that increase at the ratchet teeth grooves and gradually propagate away from the ratchet wheel axis such that the ratchet teeth edges remain free of peak pressures and deformations.