HINGED ASSEMBLY OF PISTON MACHINE Russian patent published in 2021 - IPC F16J1/16 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in piston machines, mainly in internal combustion engines. Piston con-rod assembly of piston machine contains spherical insert (1) installed in reciprocal spherical hole (2) of piston and / or crank permanent rod (3) of con-rod (4) with possibility of rotation relative to head (3) of con-rod (4) only in one plane, perpendicular to connecting rod (4) rocking plane, due to retainer limiting rocking of insert in other directions. In spherical insert (1) there is a through cylindrical hole (5), in which cylindrical piston or crank pin (6) is installed. Retainer is made in form of at least one pin (7) installed in hole (8) of piston head (3) of con-rod (4) and protruding inside spherical hole (2) of head (3) with possibility of its projecting cylindrical surface contacting with side surfaces (9) of fixing slot (10) made on external surface of spherical insert (1) and located in transverse plane of cylindrical hole (5) of insert (1).

EFFECT: technical result consists in improvement of reliability of hinged assembly due to reliable limitation of rotation of spherical hinge in directions of extra degrees of freedom, as well as high technological effectiveness and repairability of device.

3 cl, 4 dwg