Quill drive with variable feed

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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74/71

F16H 19/02 (2006.01)

Patent

CA 1148767

ABSTRACT OF THE DISCLOSURE The present invention provides a quill drive with longitudinal feed comprising: a quill shaft slidably mounted with- in one end of a housing for movement along its longitudinal axis; a spindle shaft rotatably mounted for rotation with respect to said quill shaft and carried longitudinally by said quill shaft during its longitudinal movement; means for longitudinally moving said quill shaft; means for rotationally driving said spindle shaft; said means for longitudinally moving said quill shaft com- prising a ball nut fixedly attached to the innermost end of said quill; a ball screw threadingly engaging said ball nut, and means for rotationally driving said ball screw; an adjustable stop for fixedly establishing the maximum longitudinal motion of said quill, said stop being a ring with a threaded inner diameter, said ring threadingly engaging the innermost end of said ball screw, the threaded portion of said ball screw extending along the length of said ball screw a distance, said ring abutting said ball nut when the maximum motion of said quill is reached.

412100

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