Tool changing – Including machine tool or component – Rotary spindle machine tool
Patent
1996-08-26
1997-09-02
Briggs, William R.
Tool changing
Including machine tool or component
Rotary spindle machine tool
74569, 414738, 483 44, B23Q 3157, B66C 300, G05G 100
Patent
active
056625693
ABSTRACT:
A stepping apparatus capable of large angle oscillation comprising an output shaft and a driving shaft arranged parallel to, and spaced apart from, each other wherein the output shaft is provided with a roller wheel plate, both sides of the wheel plate being pivoted with a plurality of alternately spaced rollers, a pair of plate cams being secured on the driving shaft for driving in combination with the rollers on both sides of the wheel plate, allowing the driving shaft to drive the output shaft for reverse angular rotation, standstill, forward angular rotation, indexing, and other stepping sequential operations. Said plate cams remain in camming contact with at least two rollers, causing them to be positioned on the opposite sides of the line connecting between the driving shaft and the output shaft for positive driving between the cams and the rollers, characterized in that during the sequential operation of reverse angular rotation, the two rollers remaining in positive driving with the plate cams are offset for an angle .theta. (for example, 30 degrees) with respect to the line connecting the driving shaft and the output shaft such that the output shaft can be oscillated for large angles of more than 45 degrees (for example, 65 degrees) when the two rollers remain in positive driving with the plate cams.
REFERENCES:
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patent: 4833722 (1989-05-01), Kobayashi
patent: 5081762 (1992-01-01), Kin
patent: 5424621 (1995-06-01), Hwang
Liu Chun-Hsien
Tseng Ching-Huan
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