Patent ID: 6739225
Filing Date: 2004-05-25
Classification: B25B

Abstract:
A screw driving tool comprises a housing having an elongated direction a front end and a rear end, a drive (2) located within said housing adjacent the rear end thereof, a drive spindle (3) with in said housing and having an axis extending in the elongated direction thereof, said drive spindle (3) having a free end located outwardly of the front end of said housing, a torque coupling (4) within said housing and extending between said drive (2) and said drive spindle (3), an adjustment mechanism (8) positioned in said housing between the free end of said drive spindle (3) and said torque coupling (4), said adjustment mechanism (8) adjusts the torque transmitted by said torque coupling (4), said adjustment mechanism comprises at least one axially extending prestressable spring element (5) cooperating with said torque coupling, a compression sleeve (6) to extending around and parallel to the axis of said drive spindle and in contact with said spring element (5), said compression sleeve (6) is displaceable in the axial direction of said drive spindle (3), a control sleeve (7) arranged coaxial with and enclosing said compression sleeve (6), said adjustment mechanism comprises an axially extending adjustment sleeve (8) rotatable about said drive spindle axis, a plurality of rotatable planet (10) wheels mounted in said housing (1) having teeth (11) thereon and in form locked cooperating engagement with said control sleeve and inner teeth (9) of said adjustment sleeve (8), said housing (1) extends between said control sleeve (7) and said adjustment sleeve (8), said control sleeve (7) and said housing (1) disposed in form locked contact via a thread connection, and said planet wheels mounted in passage openings in the axially extending region of said adjustment sleeve (8) in said housing (1).