| 摘要 |
The invention relates to a device making it possible to eliminate the first order mass vibrations in a piston-type mechanism. It consists of a secondary counterweight 4 fixed into the end of the rotating shaft of the planetary gear 3, which, by virtue of the intermediate meshing with another gear is coupled to the gear 1 concentric with the journal 8. The secondary counterweight 4 rotates in relation to the crank shaft 7 with twice the angular speed of the crank shaft, but in the opposite direction. <IMAGE>
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