Quick-change mechanism for front-mounted machine tool of road sweeper

The invention discloses a quick-change mechanism for a front machine tool of a road sweeper. The quick-change mechanism comprises a quick-change fixing frame and a front machine tool quick-change support, wherein the quick-change fixing frame is arranged on a frame and can move relative to the frame, and the front machine tool quick-change support is detachably connected with the quick-change fixing frame. The quick-change fixing frame comprises a fixing frame body and a locking handle capable of rotating relative to the fixing frame body. The front face of the fixing frame faces the front machine tool quick-change support, and the back face of the fixing frame is provided with a first guide sleeve and a second guide sleeve which guide the two locking pin shafts. The locking pin shafts areconnected to the locking handle through a rotatable connecting rod; the front machine tool quick-changing support comprises a quick-changing frame which can cover the front face of the fixing frame in a matched mode. The qui