| 摘要 |
The invention relates to an assembly (1) comprising a piston (2) having a central axis (Z), a connecting rod (3), the piston (2) being articulated to the connecting rod (3) by a ball joint between a spherical surface (S1) belonging to the piston and a spherical surface (S2) belonging to the connecting rod (3), means of supplying a lubricant under pressure so that it infiltrates between the two surfaces (S1, S2), characterized in that the ball joint comprises, on one of the spherical surfaces (S1, S2), lubricant guide means configured in such a way that the lubricant forced to circulate therein through viscous friction causes the piston (2) to rotate about the central axis (Z) thereof. |
