Apparatus for bringing a tool to a workpiece and applying axial force thereto, in particular as a tapping machine
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United States of America Patent
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-
Nov 10, 1992
Grant Date -
N/A
app pub date -
Oct 19, 1989
filing date -
Oct 19, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tool head for moving a tool to a workpiece and applying an axial force thereto includes a grooved tubular spindle mounted on a fixed shaft for relative axial and rotational movement. The spindle is rotated by a timing belt transmitting power from a driver timing pulley. The timing belt is fitted around the timing pulley and grooved spindle with a pair of 90.degree. twists in the loaded and unloaded sections between the two pulleys. As power is applied to the timing pulley, the belt migrates toward the end of the pulley and the spindle closest to the unloaded section of the belt; and when a resistant torque is applied to the spindle the timing belt migrates to a stable position with respect to both the timing pulley and the grooved spindle and transmits torque and an axial force to the spindle.
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