Drilling device for outer edge of annular hardware

The annular hardware outer edge drilling device comprises a driving base, a driven bevel gear, a driving bevel gear, a driven gear, a mounting cylinder, a stepping motor, a driving gear, a telescopic rod, a drill bit, a lead screw, an adjusting base, a workbench, a threaded rod, a limiting base, an arc-shaped connecting rod, a sliding rod, an arc-shaped clamping plate, a mounting base, a connecting rod, a through groove, a telescopic column and a chain wheel. According to the annular hardware drilling device, multiple holes can be formed in the outer edge of the annular hardware at the same time, different numbers of holes can be drilled in the outer edge of the annular hardware, and therefore the drilling efficiency is greatly improved, meanwhile, the working intensity of workers is greatly reduced, and a large amount of time is shortened; and the annular hardware can be better limited and clamped, and a limiting groove in a limiting seat can prevent a drill bit from slipping, so that the drilling quality is