The invention relates to a detecting device, in particular to a
hardness detecting device of a spanner for hardware and aims to provide the time-saving and labor-saving
hardness detecting device of the spanner for hardware. To achieve the objectives, the
hardness detecting device of the spanner for hardware comprises a top plate, a first pull
rope, a first fixed
pulley, a fixing plate, a support rod, a second fixed
pulley, a support, a sliding rail, a sliding block, a reel, a first bearing block, a first rotating shaft, a first gear, a first rack, a second rack, a swing rod, a
thumb cylinder, a second gear, a first rotating motor, a swing plate, a first through tube, a second through tube, a support rod and the like, wherein the support rod, a first conveying device and a second conveying device are arranged on the ground from left to right sequentially. The detecting device realizes effects of being time-saving and labor-saving during detection, easy to operate, long in service life and high in stability and safety.