| 摘要 |
According to the present invention, a connection structure of a quick coupler to connect an attachment for heavy equipment and an excavator prevents the arbitrary separation of an attachment pin and the quick coupler as well as the arbitrary release of a coupling state of a first attachment pin and a fixing hook by operating a safety unit with the elastic supporting force of a spring member without a separate cylinder. The automatic safety device of a quick coupler according to the present invention comprises: a quick coupler body mounted on the end of an excavator arm and a push link stably; a fixing hook combined to the first attachment pin by being placed on one side of the quick coupler body; a hitch which is placed on the other side of the quick coupler body and is combined to and separated from a second attachment pin by the operation of a hydraulic cylinder; and a safety unit to maintain and release a locking combination state of the first attachment pin and the fixing hook by being combined to the hitch to be interlocked. |
