Harmonic-drive transmission

Details Harmonic-drive transmission Harmonic-drive transmission

1998-04-06

1999-08-17

Marmor, Charles A.

Machine element or mechanism

Gearing

74665A, 74665B, 74665E, F16H 3300

Patent

active

059377100

ABSTRACT:
A phasing differential gear assembly is arranged in a housing, for the speed adjustment of an output shaft which shaft may be utilized to control tension in a web on a drum being driven by the output shaft. A driven input shaft having a second end imparts a first rotational speed to a co-axially arranged first end of the output shaft. A first external toothed gear is arranged on the first end of the input shaft, and a second external gear is disposed between the second end of the input shaft and the first end of the output shaft. A third external toothed gear is disposed on the first end of the output shaft. A first flexible gear is arranged radially outwardly of the first and second external gears, and a second flexible gear is arranged radially outwardly of the second and third external gears. A first wave generator is arranged radially outwardly of the first flexible gear, and a second wave generator is arranged radially outwardly of the second flexible gear. The input shaft and the output shaft are arranged to rotate at a common speed through a coupling of the second external gear and first and second flexible gears. The first wave generator is actuatable to vary the output speed of the output shaft from the input speed of the input shaft.

REFERENCES:
patent: 2603983 (1952-07-01), Rieser
patent: 2906143 (1959-09-01), Musser
patent: 3487722 (1970-01-01), Cline
patent: 4479403 (1984-10-01), Marschner et al.
patent: 4840090 (1989-06-01), Iwata
patent: 4969376 (1990-11-01), Fickelscher
patent: 5772573 (1998-06-01), Hao
C. W. Musser--The Hamronic Drive--United Shoe Machinery Corporation--pp. 6-13, 1960.

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