It draws linear displacement sensor to cascade hybrid

The utility model discloses an it draws linear displacement sensor to cascade hybrid, the one end in even photoelectric coding dish pivot is installed with the interference fit mode to the photoelectric coding dish, the one end in even gray code coding disc pivot is installed with the interference fit mode to the gray code coding disc, even the one end of photoelectric coding dish pivot is connected with the reel, the other end in even photoelectric coding dish pivot is installed with the interference fit mode to the driving gear, driven gear installs on the planet carrier with the interference fit mode, the planet carrier cup joints at the planetary gear connecting axle outsidely, it cup joints the outside at the planet carrier to link the pivot of gray code coding disc, a planetary gear and the 2nd planetary gear install the both ends at the planetary gear connecting axle with the interference fit mode, the driving gear meshes with a planetary gear mutually, driven gear and the 2nd planetary gear mesh mutually. The utility model discloses under the condition that does not increase photoelectric coding dish raster count, the measurement accuracy that linear displacement sensor was drawn to the increment formula has been improved greatly.