Solar tracker

Abstract

A driving pinion drives two driven gears which are engaged with the driving pinion to rotate. Two drive bars which are fixed on the driven gears at a set radius respectively are inserted into two elongated openings of a frame which is pivoted on the driving pinion to make the frame seesaw, and then to make a coupler link which is borne on a stand, seesaw synchronously via a rocker mechanism having a four-bar linkage which is pivoted on both ends of the frame. Also, the stand is connected to an inclination adjusting mechanism, so that the inclination of the stand can be changed with respect to a horizontal plane.

1 . A solar tracker, comprising a dynamic mechanism and a rocker mechanism, wherein the dynamic mechanism comprises: a stand; a driving pinion, installed on an outer surface of the stand and controlled to rotate; a first driven gear and a second driven gear, located on both sides of the driving pinion respectively, meshed and driven by the driving pinion to rotate, wherein centers of axles of the driving pinion and the first and second driven gears are aligned with each other; a first drive bar and a second drive bar, fixed on the first and second driven gears at the same radius respectively; and a frame, having a central opening pivoted on the axle of the driving pinion and two elongated openings located on both sides of the central opening and aligned with the central opening, the elongated openings used to receive the corresponding first and second drive bars respectively; and the rocker mechanism comprises: a first rocker and a second rocker, one end of each rocker pivoted on a corresponding end of the frame; a coupler link, two ends of which are pivoted on the other ends of the first and second rockers respectively, a central portion between the two ends being pivoted on top of the stand to be able to seesaw freely, and, wherein when the driving pinion is controlled to rotate, a seesaw motion of the frame generated by the first and second drive bars fixed on the first and second driven gears is transmitted via the first and second rockers to the coupler link, thereby making the coupler link seesaw about the central portion synchronously. 
     
     
         2 . The solar tracker according to  claim 1 , further comprising a first right-angled bar and a second right-angled bar, located between the coupler link and the first and second rockers respectively, wherein one end of each right-angled bar is pivoted on the other end of the corresponding rocker, the other end of each right-angled bar extending a first set length and bending into a right angle and further extending a second set length to fix with a corresponding end of the coupler link into one piece and locate the central portion of the coupler link on top of the stand. 
     
     
         3 . The solar tracker according to  claim 1 , further comprising an inclination adjusting mechanism for supporting the stand, wherein the inclination adjusting mechanism makes the stand turn on a plane perpendicular to a seesaw plane of the coupler link, with respect to a horizontal plane, so as to change the stand's inclination. 
     
     
         4 . The solar tracker according to  claim 2 , further comprising an inclination adjusting mechanism for supporting the stand, wherein the inclination adjusting mechanism makes the stand turn on a plane perpendicular to the seesaw plane of the coupler link, with respect to a horizontal plane, so as to change the stand's inclination. 
     
     
         5 . The solar tracker according to  claim 4 , wherein the inclination adjusting mechanism for the stand comprises two support brackets for supporting the stand to turn on a plane perpendicular to the seesaw plane of the coupler link, wherein a locking-hole is formed on each of these two support brackets at a set radius; using a rotating center of the stand and the support brackets as a center of circle, and numbers of locating holes having equal intervals are formed on corresponding sidewalls of the stand; and two pins, inserted into the corresponding locating holes on the sidewalls of the stand through the locking-holes on the support brackets for maintaining the inclination of the stand with respect to the horizontal plane after adjusting the inclination of the stand. 
     
     
         6 . The solar tracker according to  claim 3 , wherein the inclination adjusting mechanism for supporting the stand comprises a gear, located on the same rotating center as the stand and fixed together with the stand into one piece; and a driving pinion, mounted on the support bracket, wherein the gear is engaged with the driving pinion, and the pinion is driven by electrical power so as to adjust the inclination of the stand by the turning of the gears.