Pinion gear and starter with pinion gear
AssigneeDenso Corporation
InventorTatsuya FUJITA
Life of this patent
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Abstract
To suppress generation of noise during cranking, a pinion gear is fixed to a drive shaft of a starter starting an internal combustion engine. The pinion gear rotates a ring gear provided to the internal combustion engine by meshing therewith. The pinion gear includes gear teeth and an annular hollow portion located radially inside of the gear teeth. The annular hollow portion accommodates a vibration absorber to absorb vibration generated in the gear tooth.
Claims13
A pinion gear fixed to a drive shaft of a starter for starting an internal combustion engine, the pinion gear rotating a ring gear provided to the internal combustion engine by meshing therewith, the pinion gear comprising:
- gear teeth disposed on an outer circumference of the pinion gear;
- a hollow portion located radially inside of each of the gear teeth, and
- a vibration absorber stored in the hollow portion,
- wherein the vibration absorber has a higher vibration absorption property than a portion of the pinion gear surrounding the hollow portion.
Dependencies are inferred from the claim text.