Speed-increasing spindle device
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United States of America Patent
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-
Dec 23, 1997
Grant Date -
N/A
app pub date -
Jan 31, 1996
filing date -
Feb 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A speed-increasing spindle device in an assembly structure in a separable form of device main body and shank, capable of using a coupling bolt of large diameter, high in rigidity, and sufficient in strength. The head of the coupling bolt is rotatably engaged in a bolt head engaging part provided at one side of the device main body and shank, while the threaded part of the coupling bolt is engaged with a screw hole provided at the other side of the device main body and shank, and the engaging part for rotary operation tool provided on the outer end plane in the axial direction of the coupling bolt confronts outside through the insertion hole of the shank. The bolt head engaging part has a bolt head accommodating space larger than the maximum hole diameter permitted in the shank in terms of strength, and therefore the shaft diameter of the coupling bolt may be set, at least, as large as the maximum hole diameter of the shank.
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