12-03-2020 дата публикации
Номер: US20200080577A1
Принадлежит:
The present invention relates to a safety device for a quick coupler and, more particularly, to a safety device for a quick coupler, the safety device having an improved structure that is configured to improve the structure of a locking device, the locking device preventing the fixing hook from being arbitrarily released from a locking engagement, by using a safety plate that is laterally moved in a sliding manner by an elastic force of a DIE spring after a fixing hook and a first attachment pin are assembled together. 1. A safety device for a quick coupler , the safety device comprising:{'b': '100', 'a quick coupler body () connected to an arm of an excavator;'}{'b': 110', '100', '10', '112, 'a fixing hook () provided at a first side of the quick coupler body (), engaged with a first attachment pin (), and provided with a stopping protrusion () having an opening-side end portion protruding upwardly;'}{'b': 120', '100', '210', '200', '20', '210, 'a hitch () provided at a second side of the quick coupler body (), and connected to a cylinder rod () of a main-cylinder () to be engaged with a second attachment pin () when the cylinder rod () performs forward operation; and'}{'b': 300', '110', '10, 'a first locking means () for preventing locking engagement between the fixing hook () and the first attachment pin () from being arbitrarily released,'}{'b': '300', 'wherein the first locking means () comprises{'b': 310', '100, 'a first support plate () fixed to the quick coupler body ();'}{'b': 320', '310', '322, 'a sub-cylinder () mounted to the first support plate () and in which a sub-rod () is retracted;'}{'b': 330', '332', '322', '340', '110, 'a moving plate () having a first support step () that is connected to the sub-rod () and a safety plate () at a lower surface of the moving plate, and disposed to be moveable in a sliding manner toward an upper side of the fixing hook (); and'}{'b': 350', '310', '400', '330', '110, 'at least one DIE-spring () fixed to the first ...
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