Gear supporting structure and hybrid driving unit employing gear supporting structure
AssigneeAisin Aw Co., Ltd.
InventorsMasayuki Takenaka, Kazumasa Tsukamoto
Life of this patent
Estimating the term…
Abstract
A gear supporting structure is designed to support two gears on a shaft with a short axial supporting span and without eccentricity or inclination. In this gear supporting structure wherein a first gear and a second gear are supported by a shaft in whirl-stopping and centering manners, the first gear with an axially extending boss portion is engaged with the shaft and fitted thereto in a centering manner at a whirl-stop portion and a first fitting portion, which are formed at different positions. A second fitting portion of the second gear is fitted to an outer periphery of the boss portion in a centering manner and connected with the first gear in a surface-fitting manner by a fastening device.
Claims21
A gear supporting structure, comprising:
- a shaft;
- a first gear with a whirl stop portion engaging the shaft, a first fitting portion fitted to the shaft and a boss portion extending axially, wherein the first gear is supported by the shaft in whirl stopping and centering manners by engaging the whirl stop portion with th shaft and fitting the first fitting portion to the shaft;
- a second gear with a second fitting portion fitted to an outer periphery of the boss portion, wherein the second gear is supported by the first gear in a centering manner by fitting the second fitting portion to the outer periphery of the boss portion, is connected with the first gear in a whirl stopping manner by a fastening device, and is supported by the shaft in whirl stopping and centering manners via the first gear;
- a first counter gear meshing with the first gear;
- and
- a second counter gear meshing with the second gear.
A gear supporting structure, comprising:
- a shaft;
- a first gear with a whirl stop portion engaging the shaft, a first fitting portion fitted to the shaft and a boss portion extending axially, wherein the first gear is supported by the shaft in whirl stopping and centering manners by engaging the whirl stop portion with the shaft and fitting the first fitting portion to the shaft;
- and
- a second gear with a second fitting portion fitted to an outer periphery of the boss portion, wherein the second gear is supported by the first gear in a centering manner by fitting the second fitting portion to the outer periphery of the boss portion, is connected with the first gear in a whirl stopping manner by a fastening device, and is supported by the shaft in whirl stopping and centering manners via the first gear, wherein the first fitting portion and the second fitting portion are overlapped with each other radially with respect to an axis of the shaft.
A hybrid driving unit, comprising:
- an engine-side drive gear drivingly connected with an engine;
- a motor-side drive gear drivingly connected with a motor;
- a counter shaft drivingly connected with wheels;
- an engine-side counter driven gear that meshes with the engine-side drive gear, that is supported by the counter shaft in whirl-stopping and centering manners, and that transmits power from the engine to the counter shaft;
- a motor-side counter driven gear that meshes with the motor-side drive gear, that is supported by the counter shaft in whirl-stopping and centering manners, and that transmits power from the motor to the counter shaft;
- and
- an axially extending boss portion formed in one of the counter driven gears with the other counter driven gear supported by the boss portion in whirl-stopping and centering manners and supported by the counter shaft in whirl-stopping and centering manners via the one of the counter driven gears.
Dependencies are inferred from the claim text.