Patent ID: 8276430

Claim:
A hydraulic pressing and/or cutting tool ( 1 ) comprising: an electric motor ( 6 ) powered by an accumulator ( 5 ) and comprising a drive shaft ( 9 ); a converting mechanism ( 8 ) connected to the drive shaft ( 9 ) and suitable to convert the rotary motion of the drive shaft ( 9 ) to an oscillating translational motion; a hydraulic pump ( 11 ) connected to the converting mechanism ( 8 ) and suitable to carry out, in response to the oscillating translational motion, an increase in the pressure of a hydraulic fluid acting on a drive piston ( 12 ) such as to displace the drive piston ( 12 ); two jaws ( 13 , 14 ) connected to the housing ( 2 ) in a movable manner relative to each other, of which at least one movable jaw ( 14 ) is connected to the drive piston ( 12 ) such that, in response to the displacement of the drive piston ( 12 ), the jaws ( 13 , 14 ) carry out a relative movement for performing compression or cutting, characterized in that the converting mechanism ( 8 ) comprises: a epicycloidal gear ( 16 ) connected to the drive shaft ( 9 ) and suitable for reducing the rotary motion of the drive shaft ( 9 ); a thrust unit ( 17 ) comprising a rotating plate ( 18 ), a displaceable but rotatably-locked translatable plate ( 10 ) and cam-thrust members ( 19 ) arranged between the two facing plates and in rolling contact with rolling tracks ( 20 , 21 ) thereof, wherein at least one of the rolling tracks ( 20 ) is cam-shaped such that the rotation of the rotating plate ( 18 ) causes a translational oscillating motion of the translatable plate ( 10 ), wherein the thrust unit ( 17 ) is co-axial with the epicycloidal gear ( 16 ) and the rotating plate ( 18 ) is connected by means of pins ( 25 ) to a train of planets ( 22 ) of the epicycloidal gear ( 16 ) such as to rotate in response to the revolution motion of the train of planets ( 22 ).