TRAILER HITCH COUPLER

Disclosed is a trailer hitch coupler, including a body mounted to a vehicle body and a hitch, wherein the body comprises a driving shaft, a driven shaft, a transmission disc, and at least two claws rotatably mounted; at least two pairs of locking slots that correspond to the claws in a one-to-one manner and block non-corresponding claws to be snapped into are provided at an outer circumferential side of the driven shaft, each pair of the locking slots being distributed symmetrically about the center of the driven shaft; the driven shaft drives the hitch to rotate; the transmission disc is provided with toggle blocks in one-to-one correspondence with the claws; the driving shaft actuates the transmission disc to idle such that the toggle blocks push the claws to be released out of the locking slots to unlock the driven shaft to rotate; after the claws unlock the driven shaft to rotate, the driving shaft drives, via the transmission disc, the driven shaft to rotate so as to switch the hitch between a folded position and an unfolded position; and the body further includes resilient members for driving the claws to reset, wherein when the hitch is in the folded position or the unfolded position, the resilient members actuate the claws to reset so as to snap the claws in the corresponding locking slots, thereby locking the driven shaft from rotation.