Patent ID: 9669658
Date: 2017-06-06
CPC Classifications: B60B,Y10T

Claim:
1. A hollow twin-wheel caster structure of a luggage, for installing to a bottom of the luggage, the caster structure comprising a wheel seat for coupling to the bottom of the luggage; a hollow shaft unit horizontally connected to or integrally formed with the wheel seat, two ends of the hollow shaft unit extending out of the wheel seat to form a pair of coupling portions, a center of the hollow shaft unit being formed with a hollow portion communicating with the two ends of the hollow shaft unit; two plastic wheels fitted on the coupling portions at the two ends of the hollow shaft unit; at least one bearing fitted on the hollow shaft unit; and a support member plugged into a center of the hollow portion of the hollow shaft unit, not filling up the whole hollow portion such that two ends of the hollow portion are respectively formed with two spaces, the support member leaning against an inner wall of the hollow portion and preventing the hollow shaft unit from being compressed and deformed.