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(PURPOSE)To provide a floating seal structure employed for a track roller or the like of a hydraulic shovel or the like which maintains sealing performance against pressure produced by the accumulation of foreign matter such as earth and sand. ! A floating seal structure contains floating seals prov

(PURPOSE)To provide a floating seal structure employed for a track roller or the like of a hydraulic shovel or the like which maintains sealing performance against pressure produced by the accumulation of foreign matter such as earth and sand. ! A floating seal structure contains floating seals provided in a radial direction of an axial clearance between a fixed side collar housing 19 and a rotation side roller housing 21 so as to seal the clearance. The floating seals are arranged in an inner peripheral part of the fixed side collar housing and an inner peripheral part of the rotation side roller housing and formed of a pair of seal rings 24B having sliding surfaces coming into slide contact with each other. A pair of elastic rings 24A which are provided between one of the seal rings and the inner peripheral part of the fixed side collar housing, and between the other of the seal rings and the inner peripheral part of the rotation side roller housing, seal the clearances produced between the inner peripheral part of the fixed side collar housing and one of the seal rings, and between the inner peripheral part of the rotation side roller housing and the other of the seal rings, respectively. ! (C)2011,JPO&INPIT

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