| 摘要 |
The invention relates to a hollow piston ( 1 ) for a piston engine, said hollow piston comprising a peripheral wall ( 3 a), a central rod ( 11 ), a front wall ( 3 b) on the front end thereof, and an articulated part 4 a) on the rear end thereof The inventive hollow piston ( 1 ) has an annular cavity ( 14 ) formed against the rod ( 11 ), between the peripheral wall ( 3 a) and the articulated part ( 4 a). A rear section of the cavity ( 14 ) forms a front section of the articulated part ( 4 a). The aim of the invention is to stabilize the hollow piston while ensuring an efficient guidance of the piston. To this end, the rod ( 11 ) ends the region of the cavity ( 14 ), the articulated part ( 4 a) is a cap-shaped articulation recess ( 4 c), and the rear section of the cavity ( 14 ) forms at least part of the articulated surface ( 4 g) of the articulation recess ( 4 c).
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