BEARING DEVICE FOR CONSTRUCTION MACHINE

WIPO Patent Application WO/2013/108453

A1

In the present invention, a simple configuration makes it possible to absorb an axial clearance between a bracket and a boss member by adjustment on-site, and enhances assembly workability of a bearing device for a construction machine. The invention pertains to a bearing device (31) used for a connecting part of a construction machine loaded with an upper turning body (2) on a lower travelling body (1), and a work device (5) mounted onto the upper turning body. The bearing device has: a first member having a boss part; a second member having left and right brackets (17A, 17B) that sandwich the boss part (32) from the left and right sides thereof; a bush (16) that is retained by an inner peripheral side of the boss part; a sealing means (38) that is disposed between the bush and the left and right brackets and that prevents a lubricant medium from leaking out of the bush; a thrust plate (36) inserted between the left and right brackets and the boss part; and a fastening pin (20) that penetrates and is inserted through the left and right brackets and the bush. The thrust plate has an annular shape from which a portion has been cut out, and the angle of a cut-out portion (24) in the circumferential direction is less than 180° at an inner peripheral portion of the thrust plate.

AKITA HIDEKI (JP)
SAKURAI SHIGEYUKI (JP)
SATOU AKIKO (JP)
GOKITA OSAMU (JP)

PCT/JP2012/076907

July 25, 2013

October 18, 2012

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HITACHI CONSTRUCTION MACHINERY (JP)

E02F3/38; E02F9/00; F16C11/04; F16C17/04; F16C33/10; F16C33/14

JPH10122235A	1998-05-12
JP2009041659A	2009-02-26

POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)

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