Automatic collecting device for atmospheric rainfall

The automatic collecting device comprises a bearing plate and a shooting device, a fixing rod is fixedly connected to the bearing plate, a baffle is fixedly connected to the fixing rod, a spline is fixedly connected to the fixing rod, a cam is slidably connected to the fixing rod through the spline, and a sliding groove is formed in the fixing rod; the bearing plate is provided with a delivery mechanism used for automatically and quantitatively delivering rainwater after the bearing plate is full of the rainwater, the bearing plate is fixedly connected with two supporting blocks, the two supporting blocks are provided with rotating grooves and rotationally connected with an inner gear ring through the rotating grooves, and the inner gear ring is fixedly connected with a plurality of sets of collecting tanks; the bearing plate is provided with an opening and closing mechanism used for opening and closing the cover of the collecting tank regularly so as to collect rainwater and keep sealing. Through cooperation