| 摘要 |
This invention provides a reducer to selectively carry out speed shift of double ratio, namely high ratio and low ratio. Though the existing ring gears at the one side were at a fixed status, this invention can selectively and separately drive and control ring gears on the both sides as well as drive them together so that gear shifting with various ratio become enable via the additional configuration of multi-stage gear shifting function. If setting up tooth numbers between ring gears alternately, gear shifting of various ratio can be selectively applied without using power to control equipped with all the rotation. This invention has basically a wire pulley function and drum pulley function but optional application of other functions is easy which includes a pulley to accommodate a tackle pulley and all types of rope by providing an easy assembling and disassembling of the above wire pulley. |
