Stabilized bearing structure for supporting a crankshaft in...

Details Stabilized bearing structure for supporting a crankshaft in... Stabilized bearing structure for supporting a crankshaft in...

2006-10-03

2006-10-03

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Frame construction

Horizontal cylinder

C123S192100, C123S197400

Reexamination Certificate

active

07114481

ABSTRACT:
An internal combustion engine includes a split crankcase with spaced-apart journal walls. Each journal wall has a bearing hole formed therein. The engine also includes rotary bearings for supporting rotary movement of a crankshaft. A backlash-absorbing mechanism is situated proximate a first one of the rotary bearings, for cushioning radial movement of an outer bearing race. Axial movement-restraining structure is also provided adjacent the outer race, for limiting axial movement thereof. The axial movement-restraining structure may include an engaging groove provided in an inner circumferential surface of the outer race, and a restraining clamp member operatively attached to a surface of the crankcase. The restraining clamp member may include a hook portion which engages with the engaging groove of the outer race. The axial movement-restraining structure allows at least one of the crankshaft support bearings to be a roller bearing or a needle bearing, instead of a ball bearing.

REFERENCES:
patent: 3595101 (1971-07-01), Cooper, Sr.
patent: 4834041 (1989-05-01), Valev
patent: 6058894 (2000-05-01), Kobayashi et al.
patent: 6530353 (2003-03-01), Ito et al.
patent: 2004/0139942 (2004-07-01), Kamping
patent: 2005/0078895 (2005-04-01), Kanbe et al.
patent: 2003083080 (2003-03-01), None

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