Novel coupler

The utility model discloses a novel coupler, including bearing inner flange, bearing, bearing outward flange, axle pressure bearing piece, jump ring and luo post, the upper end at the bearing inner flange is established to the bearing housing, it opens one's mouth widely to have seted up one on the bearing outward flange, inside the opening on the bearing outward flange was established to the upper end card of bearing inner flange, the upper end of this bearing outward flange was provided with a recess, axle pressure bearing piece card is located on the recess, the jump ring card is established between bearing outward flange and axle pressure bearing piece, axle pressure bearing piece is provided with a plurality of little fixed orificess, the upper end of bearing inner flange is providedwith with it that the size equals, little fixed orifices that the shape is the same, the axle pressure bearing piece be connected through the cooperation of luo post with little fixed orifices with the bearing inner flange. T