Belt breakage protection device of double-four-rod type belt conveyor

The invention discloses a belt breakage protection device of a double-four-rod type belt conveyor. The belt breakage protection device of the double-four-rod type belt conveyor is characterized in that a set of double-rocker four-bar mechanism is formed by a machine frame, a connecting frame rod, a lower arresting block and an upper arresting block, the connecting frame rod is a driven part, the lower arresting rod is a connecting rod, the upper arresting rod is a driving rod, and a clamping mechanism of a double-four-connecting-rod broken belt protection device is formed by the double-rockerfour-bar mechanism; the machine frame, the upper arresting device and a hydraulic cylinder form a group of double-rocker four-bar mechanisms, is a driven rod, and the hydraulic rod is a connecting rod, the hydraulic cylinder body is a driving rod, the double-rocker four-bar mechanism serves as an executing mechanism of the double-four-connecting-rod broken belt protection device. The belt breakageprotection device is conn