Balance wheel unit and balance wheel sorting machine

The invention discloses a balance wheel unit and a balance wheel sorting machine. The balance wheel unit comprises conveying wheels, a wheel set frame body and Mecanum wheels; the Mecanum wheels are tangent to the conveying wheels so as to achieve transmission through friction force; the conveying wheels can be rotationally connected to the wheel set frame body along the axes of the conveying wheels; and the wheel set frame body can drive the conveying wheels to integrally deflect, and the deflection plane is parallel to the axes of the conveying wheels and the axes of the Mecanum wheels so that the Mecanum wheels can be tangent to the conveying wheels all the time in the deflection process. According to the balance wheel unit, the Mecanum wheels serve as a transmission mechanism, power is transmitted to the conveying wheels through friction force, it is guaranteed that the speed in the conveying direction is kept unchanged all the time after swinging and before swinging, and therefore the situation that foll