| 摘要 |
PROBLEM TO BE SOLVED: To provide a hexagonal wrench which effectively prevents scratch circularization in the inside hexagonal hole of a bolt.SOLUTION: A hexagonal wrench structure shows that a tool rod body is provided with at least one work end to keep each cross section of the work end hexagonal with the first cross section located close to the end part of the work end, and the second cross section located close to the base part of the work end. Since the diameter of an inscription circle of the first cross section is smaller than the diameter of an inscription circle of the second cross section, the work end is conical with the first cross section and the second cross section displaced by the first angle θ1, so that six fitting curves extending while enlarging towards the base part under twisting are formed by connecting the tips of six corners in the first cross section with the tips of six corners in the second cross section.SELECTED DRAWING: Figure 7 |
