The invention discloses a photovoltaic
assembly on the roof of a box-type semi-trailer, comprising a mounting foot, an angle adjustment mechanism, a lifting adjustment mechanism and a self-cleaning mechanism, wherein the top of the mounting foot is fixedly connected to a body, wherein the angle adjustment mechanism comprises a motor, and the motor is fixedly connected to the middle of the bottom of the body. In the invention, when the adjustment bottom plate is folded, the adjustment bottom plate is tilted and pressed down, so that the
airbag at the bottom of the adjustment bottom plate contacts the body, so that the air in the
airbag is squeezed, and at the same time, the air in the
airbag is introduced into the adjustment box through a connecting
pipe rack, so that the pressure at the spring is increased, and then the spring is stretched, when the spring is stretched, the
piston plate pushes the rotating rod to move through the moving plate, when the rotating rod moves, the slider slides in the limiting slide groove, and at the same time, the cleaning roller on the rotating rod contacts the top of the double-sided photovoltaic panel, rotates when the cleaning roller contacts the top of the double-sided photovoltaic panel, and cleans the top of the double-sided photovoltaic panel during rotation, so that the device can perform self-cleaning work when folded.