Drive for railroad ballast tamper apparatus
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United States of America Patent
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Aug 15, 2017
Grant Date -
Mar 26, 2015
app pub date -
Sep 19, 2014
filing date -
Sep 25, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A tamper drive includes a wobble shaft rotatable about a central axis. The wobble shaft includes an eccentric hub recess within a movable bearing coupled to a yoke. The movable bearing rotates when the wobble shaft rotates to induce reciprocal movement of the yoke. In another tamper drive, an eccentric portion of a wobble shaft is rotatable within a bearing coupled to or integrated with an offset lobe having a pin slidingly disposed therein. Still another tamper drive includes an arm having a shaft fixedly coupled to one end, and first and second cam followers disposed at the other end. A rotatable cam provides a cam surface for each of the first and second cam followers.
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