Patent ID: 6939262
Filing Date: 2005-09-06
Classification: B25F,F16H,Y10T

Abstract:
1. A gearing switch device comprising: an input gear; a casing having a receiving space and a slot defined through a wall of the casing; a speed reduction device received in the casing and having a disk which has a plurality of planet gears on a first side of the disk and the input gear located between and engaged with the planet gears, an output gear connected to the other side of the disk, a ring gear having inner teeth in an inner periphery and outer teeth in an outer periphery of the ring gear, the planet gears engaged with the inner teeth, a plurality of transferring gears connected to the casing and engaged with the outer teeth; a switch assembly having a switch member with a central hole and a plurality of recesses defined in an outer periphery of the switch member such that the transferring gears located in the recesses, each recess having engaging teeth defined in a side thereof, a protrusion extending radially outward from the switch member and through the slot of the casing; a plurality of idle gear sets connected to a side of the switch member each having a first idle gear and a second idle gear, teeth of each of the first idle gear and the second idle gear located in alignment with the engaging teeth of the recesses, the first idle gear, the second idle gear and the engaging teeth located at different radial positions such that only one of the first idle gear, the second idle gear and the engaging teeth is engaged with the input gear in the same time, one of the first idle gear, the second idle gear or the engaging teeth being alternatively engaged with the transferring gears.