| 摘要 |
The locus of a gearing contact points called an action curve (A) is embodied in the form of a lemniscate (Lg, Ld) having a double point coinciding with the rolling point (T) of two pitch circles (Pr<SUB>g</SUB>, Pr<SUB>d</SUB>). The gearing contact is carried out at the top point (S<SUB>gh</SUB>) of the lemniscate under a zero wireless pressure between two points where profiles have the same centred curve on the rolling point (T). Said invention is used for reducing wear and operating noise.
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