COMPOSITE CRANKSHAFT (VERSIONS) Russian patent published in 2019 - IPC F16C3/12 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to mechanisms of machines incorporating crank shaft, for example, to piston machine conversion mechanisms. Composite crankshaft contains at least two main journals (1, 2) with main rolling bearings (17) and crank journal (3) contacting each other with end surfaces at connection point. Crank bearing (11) is installed on crank journal (3). On the end surface of main journal (1, 2) there is protrusion (5) with formation of two cylindrical surfaces: support (6), coaxial with main journal (1, 2), and additional (8), longitudinal axis of which coincides with the longitudinal axis of crank journal (3). In end surface of crank journal (3) there is a recess with inner cylindrical fixing surface (7) contacting bearing surface (6) of main journal. Diameter of additional external cylindrical surface (8) of protrusion (5) does not exceed diameter of crank journal (3), and end surface of protrusion (5) contacts end surface of crank journal (3).

EFFECT: reduction of shaft length and increase of shaft rigidity.

10 cl, 4 dwg