Abstract: A ratchet structure for a screwdriver, comprising a ratchet body and a toothed shaft having a segment of a toothed outer surface, wherein a ratchet speed multiplier mechanism which is fitted with the ratchet body and allows the toothed shaft to have a multiplied speed is also sleeved outside the toothed shaft. The ratchet structure has a reasonable structure and the screwdriver exhibits good braking effect, so that the toothed shaft can be rotated at a 5× speed. In this way, the speed for screwing a screw is greatly increased and it is more manpower-saving.

Abstract: The present application relates to a ratchet structure for a screwdriver, comprising a ratchet body and a toothed shaft having a segment of a toothed outer surface, wherein a ratchet speed multiplier mechanism which is fitted with the ratchet body and allows the toothed shaft to have a multiplied speed is also sleeved outside the toothed shaft; and the ratchet speed multiplier mechanism comprises a ratchet speed multiplier casing and three planetary gears, the ratchet speed multiplier casing is sleeved on the toothed shaft and arranged above a steering switch in a folded manner, a toothed surface engaged with the three planetary gears is provided annularly on an inner side of the ratchet speed multiplier casing, the three planetary gears are rotatably arranged on the ratchet speed multiplier casing by a positioning pin, and one end of each of the planetary gears is engaged with teeth on the toothed shaft and the other end thereof is engaged with the ratchet speed multiplier casing.