Electricity: motive power systems – Positional servo systems – Antibacklash systems
Patent
1993-06-14
1995-07-04
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
Antibacklash systems
318625, F16H 5712, H02P 769, H02P 7747
Patent
active
054303613
ABSTRACT:
A drive system comprising an integrated gearhead motor system that produces relatively high torque output with minimal backlash. The present invention uses two axially mounted electric or air motors and gearhead assemblies integrated into a single unit. The two motor and gearhead assemblies are connected to concentric output drive shafts, and each output shaft mates to a respective gear of a split gear assembly. The split gear assembly is coupled to a drive shaft of a device that is to be driven by the system. A tachometer is coupled between the first motor and a position sensor is coupled to the drive shaft of the device that is to be driven. The tachometer and position sensor are coupled to a controller that is used to control the respective torques provided by the two motors in response to rate and position signals provided thereby. By controlling the relative amount of torque provided by the two motors, the split gear assembly removes the backlash from the gearheads and gear interfaces to the drive shaft of the device that is to be driven. The present invention incorporates the two motors and two gearhead assemblies into a single assembly, reducing weight and space requirements. The design of the present invention also permits retrofitting of the drive system into existing single motor drive systems.
REFERENCES:
patent: 1076614 (1913-10-01), Thomas
patent: 1221391 (1917-04-01), Thullen
patent: 2740909 (1956-04-01), Chapman
patent: 3161083 (1964-12-01), Roe
patent: 3434025 (1969-03-01), Parkinson et al.
patent: 3862444 (1975-01-01), Hale
patent: 4158845 (1979-06-01), Pinson
patent: 5100271 (1992-03-01), Kameyama et al.
Denson-Low Wanda K.
Gortler Hugh P.
Hughes Aircraft Company
Ro Bentsu
Sales Michael W.
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