Transmission device for heliostat

The invention relates to the field of solar energy application, and discloses a transmission device for a heliostat. The transmission device can be used for a solar tower-type generation system and a photovoltaic biaxial sun-tracking system. The transmission device for the heliostat comprises a shaft sleeve which is fixedly arranged on the top end of the vertical shaft of the heliostat horizontally, a rotating shaft which is matched with the shaft sleeve, a fixed plate which is connected with the end of the rotating shaft and the middle part of the back plate of the heliostat, and a transmission mechanism which is fixedly arranged on the shaft sleeve; the output end of the transmission mechanism is movably connected with the side part of the back plate of the heliostat; the transmission device for the heliostat is characterized in that the transmission mechanism comprises a combination of a gapless ball bearing lead screw with pre-tightening force and a nut; a shell body is arranged outside the nut; a gear is