Crankshaft mechanism for engine
AssigneeHonda Motor Co., Ltd.
InventorsHisashi SAKUYAMA, Shunsuke MUROI
Life of this patent
Estimating the term…
Abstract
A crankshaft mechanism for an engine wherein a crankshaft can be disposed close to the piston side while securing a moment of inertia. In the crankshaft mechanism for the engine including the piston, the crankshaft is provided with a crank pin and counterweight parts, and a connecting rod connecting the piston and the crank pin of the crankshaft to each other, the inner side of a circumferential end, on the opposite side of the crank pin, of each of the counterweight parts is cut out along a curve at equidistance R from the center Q of the crank pin, to obtain such a shape so as to avoid a projected part, projected in the direction of the piston, at the lower end of a small end part of the connecting rod when the piston reaches the bottom dead center.
Claims20
A crankshaft mechanism for an engine comprising:
- a piston;
- a crankshaft provided with a crank pin and a counterweight part;
- and
- a connecting rod connecting said piston and said crank pin of said crankshaft to each other;
- wherein an inner side of a circumferential end, on the opposite side of said crank pin, of said counterweight part is cut out along a curve at an equidistance from a center of said crank pin to obtain such a shape for avoiding a projecting part, projecting in the direction of a piston pin, at a lower end of a small end part of said connecting rod when said piston reaches a bottom dead center.
A crankshaft mechanism for an engine comprising:
- a piston;
- a crankshaft provided with a crank pin;
- a connecting rod connecting said piston and said crank pin of said crankshaft to each other;
- a counterweight part formed on said crankshaft, said counterweight part including an inner side of a circumferential end, on the opposite side of said crank pin, that is cut out along a curve at an equidistance from a center of said crank pin;
- said cut out shape of said counterweight part avoids a projecting part at a lower end of a small end part of said connecting rod when said piston reaches a bottom dead center.
Dependencies are inferred from the claim text.