| 摘要 |
A motorized gearbox having a drive shaft is provided. The motorized gearbo x provides input power to rotate the drive shaft. The drive shaft is inserted into a jack housing. Rotation of the drive shaft raises or lowers the jack housing. The integrate d drive shaft is capable of replacing a hand crank and an input shaft of a mechanically operated jack to convert the mechanically operated jack to a motorized jack. |
