HYDRAULIC VARIABLE TORQUE WRENCH FOR USE IN VEHICLE FOR HIGH LIFT WORK

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic variable torque wrench for use in a vehicle for high lift work, which works quietly, is easy to use without harm of reaction torque, and provides strong torque. SOLUTION: The variable torque wrench includes: a hydraulic pressure receiving means for receiving a hydraulic pressure from a hydraulic circuit routed in the vehicle for high lift work; a hydraulic gear motor (15) connected with the hydraulic pressure receiving means for constituting a torque generation source; a torque conversion mechanism connected with the gear motor (15) for converting torque; a relief valve (2) capable of arbitrarily regulating the hydraulic pressure supplied to the gear motor (15); a main shaft (4) for obtaining a torque output from the torque conversion mechanism; a socket (5) detachably mounted on the main shaft (4) and engaged with an object to be capable of applying the torque; and a reaction relief bearing with a multi-bearing structure for rotatably pivoting a shell of a retarder constituting the torque conversion mechanism to a hand-held tool. A reaction receiver (6) integrally rotatable with the shell of the retarder is attached to the shell. COPYRIGHT: (C)2004,JPO&NCIPI