Coupling for drive shaft and servo-motor driven shaft

Details Coupling for drive shaft and servo-motor driven shaft Coupling for drive shaft and servo-motor driven shaft

1982-06-28

1984-07-10

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Automatic

192 46, 192 71, 180 791, F16D 1106, B62D 504

Patent

active

044587953

ABSTRACT:
A mechanical coupling for a power steering system and the like having a driven shaft reversibly rotated by a servo-motor in response to either clockwise or counter-clockwise rotation of a drive shaft, with the coupling normally connecting the motor to the driven shaft. In the event of any failure of the motor to rotate the driven shaft synchronously with the drive shaft, as for example, due to an electrical power failure, rotation of the drive shaft causes the coupling to disconnect the motor from the driven shaft in the direction opposite to the torque applied by the drive shaft and simultaneously mechanically couple the drive shaft to the driven shaft for direct drive. During that time, the coupling continues to connect the motor to the driven shaft in the direction of shaft rotation. Hence, the direct drive may be assisted by any remaining motor torque, that is, any available torque which is below the level needed to achieve synchronous motion and which is applied in the direction of rotation. But any motor torque or drag applied in a direction opposite to the direction of rotation is disconnected from the driven shaft.

REFERENCES:
patent: 300771 (1884-06-01), Fray
patent: 1363954 (1920-12-01), Carll
patent: 1388923 (1921-08-01), Bullard
patent: 1388926 (1921-08-01), Bullard
patent: 2201705 (1940-05-01), Stone
patent: 2395681 (1946-02-01), Odlum et al.
patent: 2869383 (1959-01-01), Rapp et al.
patent: 3721324 (1973-03-01), Schweizer
patent: 3893534 (1975-07-01), Steinmann
patent: 4241804 (1980-12-01), Deinenger et al.

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