Machine element or mechanism – Elements – Cranks and wrist pins
Patent
1979-06-25
1981-09-22
Callaghan, Thomas F.
Machine element or mechanism
Elements
Cranks and wrist pins
F16F 1526
Patent
active
042903190
ABSTRACT:
This invention is an apparatus for partial balancing of the free inertia forces and inertia moments of a reciprocating piston-crankshaft engine which is comprised of a pair of eccentrically weighted balancing masses mounted on an axial end of the engine. The balancing masses are mounted on drive pulleys which can be driven in opposite directions by a toothed-belt with teeth on both sides which is connected to the crankshaft. The balancing masses are arranged so that their centrifugal force components extending parallel to the cylinder axes are added and the centrifugal force components extending perpendicular to the cylinder axes cancel each other out and the axes of rotation of the pulleys are offset relative to each other in the direction of the cylinder axes. The described above can be very effectively utilized by mounting the drive pulleys of the balancing masses on a plate which is mounted for rotation on an axis extending parallel to the crankshaft axis and by providing a means for tensioning the toothed belt. There may be provided a drive for pivoting the plate upon which the drive pulleys are mounted which plate can be pivoted as a function of the speed and/or load of the reciprocating piston-crankshaft engine.
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Callaghan Thomas F.
Volkswagenwerk Aktiengesellschaft
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