Patent ID: 8302791

Claim:
A coupler draft gear, comprising a coupler, uncoupling levers coupled with uncoupling lever holes of the coupler and uncoupling lever brackets used cooperatively with the uncoupling levers, the coupler comprising a coupler body, a coupler knuckle, a coupler knuckle thrower, a coupler knuckle pin, a coupler lock, a bottom locklift toggle, a bottom locklift connector and a bottom locklift hook, the bottom locklift connector being provided between the bottom locklift toggle and bottom locklift hook in a hinged manner; characterized in that: the coupler is a double-side operating coupler, and uncoupling lever holes are provided at ends of both sides of the bottom locklift connector of the coupler so as to allow the bottom locklift connector to rotate about the bottom locklift hook under the action of the uncoupling lever; there are two uncoupling lever brackets which are fixed on a car body at both sides of the coupler respectively, and each uncoupling lever bracket has a keyhole-shaped through hole; each uncoupling lever has a restrained segment at a position where the uncoupling lever is engaged with the keyhole-shaped through hole of corresponding uncoupling lever bracket, and the cross-section of the restrained segment of the uncoupling lever is of a rectangular shape matched with a rectangular cross-section of a lower portion of corresponding keyhole-shaped through hole, and there is a gap between the restrained segment of each uncoupling lever and walls of a rectangular hole of corresponding keyhole-shaped through hole.