FAIL-SAFE DEVICE FOR QUICK COUPLER

Title:

FAIL-SAFE DEVICE FOR QUICK COUPLER

Document Type and Number:

WIPO Patent Application WO/2018/034362

Kind Code:

A1

Abstract:

The present invention relates to a fail-safe device for a quick coupler, which, in a coupling process of a quick coupler for connecting a heavy equipment attachment and an excavator, automatically prevents unintentional separation between an attachment pin and a fixed hook, and enables a locking device to be automatically operated in association with a cylinder operation for slidably moving a hitch and elastic force of first and second compression springs. The fail-safe device for a quick coupler according to the present invention comprises: a quick coupler body mounted to an end of an excavator arm and a push link; a fixed hook disposed on one side of the quick coupler body and coupled to a first attachment pin; a hitch disposed on the other side of the quick coupler body and engaged with or disengaged from a second attachment pin according to an operation of a hydraulic cylinder; and a locking means which is operated in association with a cylinder operation for operating the hitch, and prevents unintentional release of a coupling state between the fixed hook and the first attachment pin by compressive elastic force of first and second compression springs.

Inventors:

JO YOUNG HUM (KR)

Application Number:

PCT/KR2016/009084

Publication Date:

February 22, 2018

Filing Date:

August 18, 2016

Export Citation:

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Assignee:

DAEMO ENG CO LTD (KR)

International Classes:

E02F3/36; E02F9/24

Foreign References:

KR101210833B1	2012-12-11
KR20110005057A	2011-01-17
US20120177472A1	2012-07-12
US20060037220A1	2006-02-23
US6881002B2	2005-04-19
KR100739341B1	2007-07-16
KR101210833B1	2012-12-11

Other References: