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US 2012/0055438 A1Published application
Balancer shaft of engine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsTakahiro YANO, Michio Hirano, Shinya Akase
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Abstract
A balancer shaft of an engine includes a pair of journal portions, a first stage balance weight and a second stage balance weight, wherein the first stage balance weight formed between the journal portions and eccentrically arranged to an axis, the second stage balance weight formed on a center part of the first stage balance weight in the axis direction and projects outward from the first stage balance weight in the radial direction, and the balancer shaft has a recess portion on the opposite side of the eccentricity direction.
Claims5
A balancer shaft of an engine comprising:
- a pair of journal portions formed on both ends of the balancer shaft in the axis direction of the balancer shaft, the journal portions being rotatably supported by a crankcase;
- a first stage balance weight formed between the journal portions, the first stage balance weight being eccentrically arranged to an axis of the journal portions into a crank shape and having a recess portion on the opposite side of the eccentricity direction;
- and
- a second stage balance weight formed on a substantially center part of the first stage balance weight in the axis direction of the first stage balance weight, the second stage balance weight further projecting outward from the first stage balance weight in the radial direction.
1 more element
Dependencies are inferred from the claim text.