Bearing bushing for track, and method for producing the same

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United States of America Patent

PATENT NO 11162152
APP PUB NO 20190316220A1
SERIAL NO

16345350

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Abstract

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A bearing bushing for a track has an annular shape including an inner peripheral surface, an outer peripheral surface, a first end face, and a second end face located axially opposite the first end face. The bearing bushing for a track includes an inner peripheral surface-side hardened layer formed to include the inner peripheral surface, an outer peripheral surface-side hardened layer formed to include the outer peripheral surface, a first end face-side hardened layer formed to include the first end face and having a region with a hardness of 63 HRC or more that has a thickness of 3 mm or more from the first end face, and an unhardened region lower in hardness than the inner peripheral surface-side hardened layer, the outer peripheral surface-side hardened layer, and the first end face-side hardened layer, and including at least the second end face. The bearing bushing is made of steel.

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Patent Owner(s)

Patent OwnerAddress
KOMATSU LTDMINATO-KU TOKYO 107-8414

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amada, Eiji Tokyo, JP 9 35
Kondo, Yusuke Tokyo, JP 54 157
Maeda, Kazuo Tokyo, JP 139 3781

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