Two-speed drive apparatus

Details Two-speed drive apparatus Two-speed drive apparatus

1977-02-25

1979-02-06

Chandler, Lance W.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74789, 192 12B, F16H 552, F16H 5710, B60K 4124

Patent

active

041377982

ABSTRACT:
Apparatus for rotating a driven shaft in the same direction at two different speeds upon rotation of a drive shaft in respective, opposed directions. The apparatus includes a sun gear on the drive shaft, a ring gear on the driven shaft, a planet carrier rotatably mounted on the drive shaft, adjacent to the sun gear, one or more planetary gears rotatably mounted on the planet carrier and in mesh with the sun and ring gears. An over-running clutch locks the planet carrier to the drive shaft when the latter rotates in one direction to thereby lock the planetary gears to the sun and ring gears to cause rotation of the ring gear and the driven shaft in a first direction at a first speed. A sprag prevents rotation of the planet carrier relative to a fixed support when the drive shaft rotates in the opposite direction to thereby allow rotation of the planetary gears about fixed axes to rotate the ring gear and thereby the driven shaft in the first direction at a second speed.

REFERENCES:
patent: 1268350 (1918-06-01), Henry
patent: 2467627 (1949-04-01), Olson
patent: 2588187 (1952-03-01), Weiser
patent: 3581854 (1971-06-01), Versoy

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