Three-shaft-linkage solar tracking transmission device

The invention relates to a three-shaft-linkage solar tracking transmission device which comprises a horizontal transmission rotary-type decelerator (1), a vertical transmission rotary-type decelerator (2) and a rotation expansion rotary-type decelerator (3). The top portion and bottom portion of a base of the rotation expansion rotary-type decelerator (3) are provided with a first rotation shaft (10) and a second rotation shaft (11) respectively. The two ends of the second rotation shaft (11) are hinged with a base of the horizontal transmission rotary-type decelerator (1) and a base of the vertical transmission rotary-type decelerator (2) respectively. The two ends of an output shaft (7) of the vertical transmission rotary-type decelerator (2) are connected with the two ends of the first rotation shaft (10) respectively through a crank (8) and a connection rod (9). The three-shaft-linkage solar tracking transmission device is compact in structure, high in bearing capability, high in transmission precision and good in reliability, can improve tracking efficiency of a tracking system effectively, and increases function diversity of the tracking system.