| 摘要 |
The invention concerns a transmission device (12) mounted between a supercharger compressor (7) and a pulley (11) designed to drive same from the vehicle motor. The device comprises two successive modules (16, 46) each capable of a direct engagement ratio through a free wheel (31, 61), or of an overdrive ratio by locking the planet gear (21, 51) by means of a clutch (26, 56) clamped by a spring (28) or released by the action of centrifugal counter-weights (32, 62) whereof the action is at least compensated by the axial thrust of the teeth F<SUB>P</SUB> produced by the planet gear (21, 52) when it is loaded. The invention is useful for independently regulating the rotational speed of the apparatus (7) notwithstanding the speed variations of the pulley (11). |
