Walking-spanning device of multiple-row solar cell panel cleaning robot

The invention relates to a photovoltaic solar cell panel cleaning device and belongs to the field of photovoltaic power generation operation and maintenance. A multiple-row solar cell panel cleaning robot comprises a cleaning part arranged on the surface of a solar cell panel, a walking device arranged on the solar cell panel and a spanning device arranged on the side of the walking device. The walking-spanning device is characterized in that the walking-spanning device comprises a left spanning wheel set unit and a right spanning wheel set unit, the left spanning wheel set unit and the right spanning wheel set unit are arranged on the left side and the right side of the walking device, a motor is arranged between the left spanning wheel set unit and the right spanning wheel set unit and is connected with a T-shaped reverser through a coupling, and two output shafts of the T-shaped reverser in the horizontal direction respectively output rotation speeds consistent in rotation direction and respectively drive a leftward-screwed ball screw and a rightward-screwed ball screw which are connected to rotate so as to drive sliding block connecting plates arranged on the ball screws to perform reciprocating motion and achieve simultaneous extension of the left spanning wheel set unit and the right spanning wheel set unit respectively connected with the sliding block connecting plates.