SLEEVE STRUCTURE FOR DAMAGED SCREW NUT

摘要

A sleeve may include a hexagonal engaging hole at one end that engages with the screw nut and a coupling hole at the other end that engages with a wrench; wherein the engaging hole is inwardly tapered and the taper angle is two to four degrees, thereby enabling easy engagement of the engaging hole with screw nut; and there is a dodge groove formed at each corner of the hexagonal engaging hole and each pair of adjacent dodge grooves are separated with a driving block; and the surface of each driving block that touches the screw nut is concave and thus a driving corner is formed on each side of the driving block; and each driving block has a groove and thus two adjacent interior corners are formed at the bottom of the groove.

主权项

1. A sleeve comprising a hexagonal engaging hole at one end that engages with a screw nut and a coupling hole at the other end that engages with a wrench, wherein the engaging hole is inwardly tapered, thereby enabling easy engagement of the engaging hole with the screw nut; and a dodge groove is formed at each corner of the hexagonal engaging hole and each pair of adjacent dodge grooves are separated with a driving block; and the surface of each driving block that touches the screw nut is concave and thus a driving corner is formed on each side of the driving block; and each driving block has a groove and thus two adjacent interior corners are formed at a bottom of the groove.