Patent ID: 7895909

Claim:
A movement conversion device ( 4 ) for a motor-driven, hand-held power tool ( 2 ) for converting a rotational movement into a linear reciprocating movement, the device comprising an axially reciprocating spindle ( 10 ) provided with a connecting link guide ( 14 ); a motor-driven driving gear ( 20 ); an eccentric member ( 16 ) displaceably supported on the driving gear ( 20 ) and extending into the connecting link guide ( 14 ) for converting the rotational movement of the driving gear ( 20 ) into the reciprocating movement of the reciprocating spindle ( 10 ), the eccentric member ( 16 ) having, for changing a length of the reciprocating stroke of the reciprocating movement and for changing a load torque acting on the driving gear, a first position with respect to a rotational axis (D) of the driving gear ( 20 ) in which a distance (a) between the eccentric member ( 16 ) and the rotational axis (D) is greater than in at least one second position of the eccentric member ( 16 ); and a load-controlled spacing device associated with the eccentric member ( 16 ) for automatically adjusting the distance (a) between the eccentric member ( 16 ) and the rotational axis (D) of the driving gear ( 20 ).