| 摘要 |
<p>A portable power tool for mounting via press fit a machine part, like a pulley (37) onto a shaft (16) by the application of an axial press force on the pulley (37), comprises a housing (17), a reaction spindle (23) with a threaded end portion (34) for engaging a threaded bore (35) in the shaft (16), a push-carrier (44) axially movable by a motion converting device (40,41) rotationally powered by a standard type power wrench (10) via a planetary gearing (24) including a planet wheel carrier (28) connected to the output spindle (15) of the power wrench (10), a sun gear (26) on the reaction spindle (23) and a ring gear (29) connected to the motion converting device (40,41). A reset spring (50) is arranged to exert a biassing force on the motion converting device (40,41) such that the reaction spindle (23) only is rotated as long as the torque resistance on the reaction spindle (23) is below a certain level, whereby an axial displacement of the push-carrier (44) and the pulley (37) is delayed until the reaction spindle (23) is fully engaged and properly anchored relative to the shaft (16). <IMAGE></p> |
