THREE COLUMN TWO SHAFT TYPE SOLAR TRACKING APPARATUS USING CROSS SHAPED CONNECTION PIECE AND DIRECT CYLINDER

摘要

This invention called 3 columns dual axis solar tracker using universal joints and linear cylinders uses universal joints of 2 degrees freedom and a hinge of 1 degree freedom to form X axis for the sun"s azimuth and Y axis for the sun"s altitude and linear actuators by electric, pneumatic or hydraulic system. The structure of this invention supports the whole weights and the external forces by a main fixed column and 2 auxiliary columns of linear cylinders and can be built big in size and large in capacity so that it minimizes a damage of green fields and allows to use the land naturally. And when 2 columns is fixed and the rest column is a linear cylinder, 3 columns dual axis solar tracker is changed to 3 columns single tracker more rigid. And a office, rooms for power control, electric storage system, rainwater storage system, transport facilities and others can be built in the main big column or the structure between 2 fixed columns.