Title:
HYDRAULIC EXCAVATOR
Document Type and Number:
Japanese Patent JP2018071070
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make it easy to replace a flanged bush of a bearing device.SOLUTION: An arm tip pin 14 is inserted into an arm side pin insertion hole 12D of an arm boss 12 and each bucket side pin insertion hole 13C of each bucket bracket 13 to rotatably connect the arm boss 12 and each bucket bracket 13. A protruding end portion 14A projecting from the arm boss 12 is connected to an arm 6 and the arm tip pin 14 is inserted into the arm side pin insertion hole 12D in a state where it cannot rotate with respect to the arm boss 12 and in a state where it can be attached and detached. In each bucket side pin insertion hole 13C, a flanged bush 20 having an inner peripheral surface serving as a sliding surface 20A1 with respect to the arm tip pin 14, as well as flange portions 20B at outer end portions in a lateral direction is provided. Each flanged bush 20 is attached to each bucket bracket 13 with a fixing bolt 25 in a state in which it cannot be rotated and in a state in which it can be attached and detached.SELECTED DRAWING: Figure 2
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Inventors:
KANIWA HIROMITSU
MAEHARA YUJI
MAEHARA YUJI
Application Number:
JP2016208581A
Publication Date:
May 10, 2018
Filing Date:
October 25, 2016
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E02F3/38; F16C11/04
Domestic Patent References:
| JP2002309619A | 2002-10-23 | |||
| JPS59135951U | 1984-09-11 | |||
| JPS6149119U | 1986-04-02 | |||
| JPH051016U | 1993-01-08 | |||
| JP2009036294A | 2009-02-19 | |||
| JP2000065037A | 2000-03-03 | |||
| JPH0425611A | 1992-01-29 |
Foreign References:
| WO2006030550A1 | 2006-03-23 | |||
| KR20140095653A | 2014-08-04 | |||
| WO2000022309A1 | 2000-04-20 |
Attorney, Agent or Firm:
Kazuhiko Hirose