| 摘要 |
An orbital shaker having an upper horizontal orbiting platform and including a counterbalancing mechanism for stabilizing forces associated with the orbiting mass. The counterbalancing mechanism counteracts the moment created by the orbiting mass in the X-Z plane of the upper orbiting shaft by way of a lower counterweight rotating in phase, but spaced from the Z coordinate of the shaker load. The lower counterweight is positioned low relative to the driven, rotating shaft and is preferably incorporated into the drive sheave of the shaker. An upper counterweight, sized to counter the mass of the load, platform, etc., above it and the lower counterweight below it in the X-Y direction is connected to the driven shaft located out of phase with the load and the lower counterweight and between the load and lower counterweight in the Z direction.
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