Portable tool such as power saw, with metal support sheet embedded in plastic of lower crankcase

摘要

The portable tool has a cylinder (1) and crankshaft (4) connected to a piston (3) by a connecting rod (2), and a largely plastic casing (5) with a lower crankcase (6). A support sheet (7) is almost completely embedded in the material of the crankcase. It is made in one piece and carries support shells for screwing the crankcase to the cylinder.