Electrical actuated multi-speed drive apparatus

Details Electrical actuated multi-speed drive apparatus Electrical actuated multi-speed drive apparatus

1993-02-02

1994-06-28

Braun, Leslie A.

Interrelated power delivery controls, including engine control

Transmission control

With clutch control

192 18A, 192 18B, 192 90, 477 71, B60K 4128

Patent

active

053238885

ABSTRACT:
There is provided a two-speed drive unit for a motor drive, the motor drive having a housing and a main rotatable member. The two-speed drive unit comprises a two-speed drive housing secured to the motor drive housing and a secondary motor secured to the two-speed drive housing. The motor shaft of the secondary motor extends into the two-speed drive housing. An oil-shear brake, exterior to the secondary motor, is operably attached to the driveshaft of the secondary motor to effect braking. The two-speed drive unit further comprises a gear train operably associated with both the secondary motor shaft and a clutch, the clutch being disposed between the gear train and the rotatable member of the main motor drive for engagement and disengagement of the gear train with the rotatable member of the main motor drive. The clutch is normally engaged by a plurality of coil springs and disengaged by the action of an AC voltage coil. Control means are provided which are capable of determining and storing predetermined positions of the motor drive at which engagement or disengagement of the clutch and brake of the two-speed drive is desired. These positions are constantly monitored and adjusted to maintain the speed and accuracy of the two-speed drive.

REFERENCES:
patent: 4125178 (1978-11-01), Monks
patent: 4494635 (1985-01-01), Sommer
patent: 4506772 (1985-03-01), Sommer
patent: 4592251 (1986-06-01), Mason
patent: 4616739 (1986-10-01), Sommer
patent: 4765448 (1988-08-01), Sommer
patent: 4921078 (1990-05-01), Sommer
patent: 5172798 (1992-12-01), Mabee

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