Speed change gear mechanism for lathes

Details Speed change gear mechanism for lathes Speed change gear mechanism for lathes

1998-08-20

2000-05-16

Tsai, Henry W. H.

Turning

Lathe

Headstock

82144, 82905, 74335, B23B 1902, F16H 5904

Patent

active

060621184

ABSTRACT:
A speed change gear mechanism for lathes includes a driving shaft having a number of first gears securely mounted thereon to rotate therewith, a driven shaft including a number of second gears each rotatably mounted thereon via a bearing, and a chuck shaft including a number of third gears securely mounted thereon to rotate therewith. The number of the second gears is a sum of the number of the first gears and the number of the third gears. Each second gear is meshed with a corresponding one of the first gears and the third gears. A camshaft includes a cam formed thereon, the cam having a number of angular positions that correspond to different speeds of the chuck shaft. A clutch device has a first end selectively engaged with two of the second gears that respectively meshed wvith an associated first gear and an associated third gear to thereby determine a rotational speed of the chuck shaft.

REFERENCES:
patent: 1550429 (1925-08-01), Daimler
patent: 2489725 (1949-11-01), Rutemiller
patent: 3176529 (1965-04-01), Osburn et al.
patent: 3203276 (1965-08-01), Bullard, III
patent: 3269231 (1966-08-01), Bullard, III
patent: 5048360 (1991-09-01), Kuhn et al.
patent: 5730037 (1998-03-01), Manning
patent: 5743143 (1998-04-01), Carpenter et al.

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