Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1997-03-18
1999-08-17
Vrablik, John J.
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
418270, 416244A, 4152161, 403279, F01C 116, F01C 2100, F04D 2920
Patent
active
059384204
ABSTRACT:
A fastening structure has a screw rotor fixing a rotor shaft to a shaft hole of a rotor body. A casing includes the rotor therein, and a positioning portion and a screw portion are arranged between the shaft hole and the rotor shaft. Press fit portions are arranged at both axial ends of the shaft hole. The screw portion receives driving torque inputted to the rotor shaft and moves the rotor body so that the shaft hole and the rotor shaft hit against each other in the positioning portion. Accordingly, a fixing function of the rotor body and the rotor shaft is strengthened as the input torque to the rotor is increased. Further, the rotor has a simple structure and is cheaply manufactured. Furthermore, it is possible to prevent reductions in performance and durability of the rotor caused by any shift in position between the rotor body and the rotor shaft.
REFERENCES:
patent: 4595349 (1986-06-01), Preston et al.
Tochigi Fuji Sangyo Kabushiki Kaisha
Vrablik John J.
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