双头螺栓使用是很广泛的,但常见的拆装是将两螺母并紧,用两个扳手操作拆装,这样既工效低,又易损坏螺栓螺母,为此,我们设计了一种简易双头螺栓扳手,如图1、图2所示。偏心套1的孔要大于被拆装的螺拴直径2毫米,并加工成象葫芦状的通孔,a、b两点和手柄上的顶点c点可以夹住螺拴。当扭紧螺栓时,将手柄偏向左旋方向,套进螺栓再向右旋方向扳动,使手柄上的c点向a、b点成三点三角形挤紧, The use of studs is very wide, but the common disassembly is the two nuts and tight, with two wrenches operate disassembly, so that both low efficiency, but also easy to damage the bolts and nuts, therefore, we designed a simple double Head bolt wrench, shown in Figure 1, Figure 2. The hole in the eccentric sleeve 1 should be larger than the bolt diameter 2 mm which is to be disassembled and be machined into a gourd-shaped through hole. The points a and b and the vertex c on the handle can clamp the bolt. When the bolt is tightened, the handle is biased in the left-hand direction, then the bolt is tightened in the right-handed direction so that the point c on the handle is squeezed to the triangle a and b,