Drive assembly with different eccentricities

Details Drive assembly with different eccentricities Drive assembly with different eccentricities

1988-05-31

1989-05-23

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 57, 74 86, F01C 104, F01C 1706, F04C 1804, F16C 326

Patent

active

048325864

ABSTRACT:
In the embodiment of the invention described in the specification, a drive assembly for an eccentrically driven mass has a drive shaft which drives the mass by a first eccentric device and a secondary shaft, driven synchronously with the drive shaft, which drives a second eccentric device spaced from the first eccentric device so as to guide the mass in a constrained manner. The connection between the second eccentric device and the mass includes a resilient mounting. In order to avoid, or at least reduce, sinusoidally varying stresses imposed on the resilient mounting during operation as a result of deflection of the drive shaft, the eccentricity of the second eccentric device is larger than the eccentricity of the first eccentric device by at least a portion of the magnitude of the maximum deflection of the drive shaft in the region of the mass occurring during operation.

REFERENCES:
patent: 4300875 (1981-11-01), Fischer et al.
Motortechnische Zeitschrift, 1985, "VW's Mechanical Driven Super Charger" by Hans-Dieter Emmenthal et al.

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