Marine propulsion unit with improved drive shaft arrangement

Details Marine propulsion unit with improved drive shaft arrangement Marine propulsion unit with improved drive shaft arrangement

1988-05-23

1989-09-26

Wright, Dirk

Machine element or mechanism

Gearing

Alternating rotary

F16H 1900

Patent

active

048691216

ABSTRACT:
A marine propulsion unit (1) is provided wherein the main drive shaft (42) includes an integrally formed annular portion (46) of enlarged diameter at the location of a previously utilized lower groove and keepers (38, 37). The enlarged diameter portion increases the mass and strength of the shaft at a position subject to substantial torque forces, thus substantially eliminating problems of shaft fracture or breakage. In addition, the enlarged diameter portion is formed in the shape of a thrust collar so that the shaft can be accommodated by the previous known shaft mounting elements without redesign of the latter.

REFERENCES:
patent: 4244454 (1981-01-01), Bankstahl
patent: 4257506 (1981-03-01), Bankstahl
patent: 4630719 (1986-12-01), McCormick

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