Machine tool for broaching crankshaft connecting rod bearings
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United States of America Patent
Stats
-
Jan 23, 1990
Grant Date -
N/A
app pub date -
Oct 16, 1987
filing date -
Oct 22, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The known turn broaching of crankshaft main bearings is not suitable for broaching crankshaft bearing pins for the connecting rods because that would require locating the rotational axis of the crankshaft in the connecting rod bearing pins, whereby the crankshaft would rotate eccentrically. The resulting unbalances prevent driving the crankshaft with the r.p.m. required for the turn broaching operation. To avoid this problem a broaching lathe for the rotational or turn broaching of crankshaft connecting rod bearing pins is equipped with a steady rest including a rotating support device which permits mounting the crankshaft in the lathe in such a way that the rotational axis coincides with the axis of the connecting rod bearings of the crankshaft.
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