| 摘要 |
An electric power tool includes a housing (2), a motor (4) disposed in the housing (2), a planetary gear reduction mechanism (6) and an internal gear (22). The planetary gear reduction mechanism (6) includes multi-stage planetary gears (21, 24), multi-stage carriers (20, 23) each configured to carry a plurality of planetary gears (21, 24), and a bearing (25) assembled with a final-stage carrier (23) from a rear side of the final-stage carrier (23) to rotatably support the final-stage carrier (23). The internal gear (22) is configured to be rotatable and axially slidable while allowing planetary motion of final-stage planetary gears (24) supported by the final-stage carrier (23). A gear portion provided on the final-stage carrier (23) is formed as a separate gear (29) which is assembled with the final-stage carrier (23) from the rear side of the final-stage carrier (23) after assembling the bearing (25) with the final-stage carrier (23). |
