Quick return mechanism for a drilling machine

Details Quick return mechanism for a drilling machine Quick return mechanism for a drilling machine

1992-08-11

1993-08-10

Herrmann, Allan D.

Machine element or mechanism

Gearing

Reversal of direction of power flow changes power...

74 84R, 74333, 74421A, 192 71, F16H 572

Patent

active

052338878

ABSTRACT:
A quick return mechanism for a drilling machine comprises an input shaft, an output shaft, an overdrive gear train and a speed-reduction gear train, each disposed between the input and output shafts, a first clutch for connecting the output shaft to the input shaft through the over-drive gear train when a motor for driving the input shaft rotates in the quick-return direction and disconnecting the output shaft from the input shaft when the motor rotates in the feed direction, a second clutch selectively set at a first position and a second position, for connecting the output shaft to the input shaft through the speed-reduction gear train at the first position when the motor is rotated in the feed direction, and disconnecting the output shaft from the input shaft through the speed-reduction gear train at the second position, when the motor rotates in the quick-return direction, and a rotation=linear-movement converting unit for setting the second clutch at the first position when the motor rotates in the feed direction, and at the second position when the motor rotates in the quick-return direction.

REFERENCES:
patent: 3927580 (1975-12-01), Fawcett
patent: 3962935 (1976-06-01), Hutton et al.

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