Original spades
In the ninth year of Yonghe, he was in Guichou at the age of Kuichou. At the beginning of late spring, he would be in the Orchid Pavilion in the Shanyin of Kuaiji.
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Non-charging, pure mechanical structure innovation to achieve a rate increase. The well-designed planetary gear acceleration mechanism has an acceleration rate of 4 times under the condition of ensuring stability and operational comfort, which greatly improves the user's operating efficiency.
The special braking mechanism allows the user to switch freely between the ordinary screwdriver and the acceleration screwdriver without manually changing gears, and the steering is free.
Invention patent CN108942766B; CN108942766B of utility model patent

Non-rechargeable, purely mechanical structure innovation realizes magnification increase. The meticulously designed planetary gear acceleration mechanism has achieved an astonishing 4 times the acceleration rate while ensuring stability and operating comfort, greatly improving the user's work efficiency.The special brake mechanism allows the user to switch freely between the ordinary screwdriver and the acceleration screwdriver without manually changing the gear, and the steering is free.
Designer:Dykwiata,Xmmone
Assistant designer:NZZ,YXS
Using software:PTC Creo,Keyshot,Photoshop

Non-charging, pure mechanical structure innovation to achieve a rate increase. The well-designed planetary gear acceleration mechanism has an acceleration rate of 4 times under the condition of ensuring stability and operational comfort, which greatly improves the user's operating efficiency.

The special braking mechanism allows the user to switch freely between the ordinary screwdriver and the acceleration screwdriver without manually changing gears, and the steering is free.

A planetary gear composed of four pinions of the same specification can theoretically achieve a large transmission ratio of I = 4
In this structural design, the small gear modulus m = 0.5, the number of teeth z = 15, and the tooth width B = 5
The inner ring gear modulus m = 0.5, the number of teeth z = 75, and the tooth width B = 10