Coupler knuckle position detection mechanism of car puller

The utility model relates to a car puller coupler knuckle position detection mechanism which comprises a coupler head and a coupler knuckle, the coupler head and the coupler knuckle are hinged through a coupler pin, a linkage rotating part is installed on the coupler pin above the coupler head, and the linkage rotating part comprises a connecting arm and a connecting plate which can synchronously rotate along with the coupler knuckle. A detection frame is installed on the connecting plate, a hook opening detection plate and a hook closing detection plate are installed on the detection frame, and a hook opening detection switch and a hook closing detection switch are installed on the hook head; at the hook opening position, the hook opening detection plate rotates along with the detection frame to be close to and right opposite to the hook opening detection switch, and at the hook closing position, the hook closing detection switch rotates along with the detection frame to be close to and right opposite to the