It is used for the internal combustion engine, it is used for the internal combustion engine of piston null which consists of

摘要

It had the piston upper part part (2) and the piston bottom part (6), it is used for the internal combustion engine, the piston which consists of the plural parts and is cooled is proposed. The piston upper part part (2) and the piston bottom part (6), the screw thread equipped pin which is arranged in the piston upper part part (2) (26) with, the screw thread equipped hole which was processed to the piston bottom part (6) (29) with through, it is assembled by spiral shellfish combination. This screw thread equipped hole (29) the piston bottom part (6) the territory (31) it is arranged. This territory (31) we to be formed by approach, when the assembling with spiral shellfish combination with this, because it becomes deformed in belleville spring condition, it attaches and because of position fixing of the connection section, another position fixed expedient, for example the lock nut becomes unnecessary.