| 摘要 |
A drill comprising: a housing (2, 4); a motor (100) mounted in the housing (2, 4) having a drive spindle (16); an output spindle (60) capable of being rotationally driven by the drive spindle (16) via a torque clutch, the output spindle (60) having an impact surface (136) and a central axis (102); a tangential impact mechanism for superimposing tangential impacts onto the output spindle (60) when activated, the tangential impact mechanism comprising; a sleeve (74) rotatably mounted on the output spindle (60) which is capable of being rotationally driven by the drive spindle (16); and an anvil (116) rotatably mounted onto the output spindle (60) and which is connected to the sleeve (74) so that relative rotation of the sleeve (74) and spindle (60) results in the anvil (74) repetitively striking the at least one impact surface (136); characterised in that the output spindle (60) and the sleeve (74) are rotationally driven by a planetary gear system comprising a ring gear (70), a sun gear (78) and at least one planetary gear (94) mounted on a carrier (84) and which is drivingly connected between the ring gear (70) and sun gear (78); wherein the ring gear (70) is mounted on the output spindle (60) so that rotation of the ring gear (70) results in rotation of the spindle (60); wherein the sun gear (78) is mounted on the sleeve (74) so that rotation of the sun gear (78) results in rotation of the sleeve (74); wherein the drive spindle (16) is drivingly connected to the carrier (84) such that rotation of the drive spindle (16) results in the rotation of the at least one planetary (94) gear around the central axis (102) of the output spindle (60); wherein the tangential impact mechanism is activated when the torque clutch slips. The ring gear (70) can further be connected to the sun gear (78) via the torque clutch. |
