Planetary gear i.e. Wolfrom gear, for use in compression ratio adjusting device of combustion engine, has planetary wheels radial outwardly spring-loaded such that wheels are pressed for forming clearance-free form of gearing intervention

摘要

The gear (1) has ring gears (3) surrounding a sun wheel (2), and planetary wheels (4) arranged between the sun wheel and the gears such that the wheels form a gearing intervention (5) in a radial outer portion with the gears and another gearing intervention (6) in a radial inner area with the sun wheel. The wheels are radial displaceably formed and radial outwardly spring-loaded by a spring element (7) such that the wheels are pressed in a standstill condition of the gear for forming a clearance-free form of the former gearing intervention in a radial direction against the gears. The sun wheel and the planetary wheels are designed as a hollow wheel and sleeve shafts, respectively.