Device for tightening or loosening nuts or bolts in metallurgy field, has holding stud drowned in slide provided in striking spanner that is pressed against bolt/nut, trigger maintained by nut, and pressing spring for releasing bolt or nut

摘要

The device has a retractable holding stud (1) drowned in a slide (2) provided in a striking spanner that is pressed against a bolt or conical nut (4). A trigger (6) is maintained by a nut, and actuates a rod (3), the stud and a pressing spring (5) for releasing the bolt or nut. The rod traverses a head of the striking spanner, and a groove is machined on diameter of the nut.