| 摘要 |
A gear supporting apparatus is provided to continuously lubricate a contact part between a hub and a boss by re-injecting a lubrication oil accumulated between the hub and ribs to a contact surface between the hub and the boss. A gear supporting apparatus includes a hub(12), a cylindrical boss(22), a lubrication oil(30), and a lubrication oil re-injection unit(40). The hub projects from a center part of a gear and has a plurality of ribs formed therein. The cylindrical boss is formed at a frame, and the hub is accommodated in the cylindrical boss. The lubrication oil is injected to a friction contact surface between the hub and the boss. The lubrication oil re-injection unit pushes out the lubrication oil accumulated between the hub and the ribs to re-inject the lubrication oil to the friction contact surface. The lubrication oil re-injection unit has a propeller structure for forming an outward airflow in the hub.
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