Automatic screw locking elastic mechanism

The invention relates to an automatic screw locking elastic mechanism, of which a downward pushing cylinder is connected with a Z-axis moving mechanism; a spring mechanism is arranged on the Z-axis moving mechanism; an electronic screwdriver bit is arranged on the spring mechanism, the lower end of the electric screwdriver bit is connected with a screw chuck; the upper end of a support plate of the Z-axis moving mechanism is connected with a cylinder installation plate, and the lower end of the support plate is connected with a limit plate; a guide plate is arranged on the support plate; a guide sliding plate is arranged on the guide plate, a slide rail is arranged on the guide sliding plate, and a side block is arranged on the slide rail in a matched manner, a moving plate is fixedly connected with the slide block; the upper part of the moving plate is connected with a fixing plate through springs a and b, and the lower part of the moving plate is connected with a buffer plate; a blind hole is arranged in the moving plate, and a spring c is arranged in the blind hole; and a buffer limit pillar penetrates through the buffer plate, is inserted in the blind hole and is in contact with the spring c. Through the driving of the downward pushing cylinder, the electric screwdriver bit is driven to move downwards, meanwhile, a screw is driven to move downwards and to be rotatably attached on a product in a locked manner, the spring mechanism has a protective effect on the screw and the product, and the whole mechanism stably operates.