Bearing lubrication structure for rotation unit
AssigneeOkuma Corporation
InventorShoichi Morimura
Life of this patent
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Abstract
Provided is a bearing lubrication structure for a rotation unit having a bearing that is of a grease lubrication type in which the bearing is provided at both sides thereof with a seal structure, wherein the grease lubrication performance is improved. The bearing is provided on both sides thereof with fixed-side seal portions, and rotating side seal portions that are opposed thereto, respectively. The fixed-side seal portion is provided with a shield. The distance from the inner periphery of the shield to the axis of the rotary shaft varies depending on the location of a point on the inner periphery. The shield, which is one of the two shields, and the shield, which is the other one, are arranged so as not to have plane symmetry.
Claims4
A bearing lubrication structure for a rotation unit including a plurality of bearings and a rotary shaft rotatably supported by the bearings, the bearing lubrication structure being configured to lubricate the bearings using grease, wherein
- a seal structure is provided on both sides of each bearing, and shields are provided on a fixed side between the bearing and the seal structure at both sides thereof,
- in at least one of the shields, a distance from an inner periphery of the shield to an axis of the rotary shaft varies depending on a location of a point on the inner periphery, and
- one of the shields and the other are arranged so as not to have plane symmetry.
Dependencies are inferred from the claim text.