Patent ID: 8549705
Filing Date: 2013-10-08
Classification: A45C,B60B,Y10T

Abstract:
1. A hollow wheel set, comprising a wheel rack, provided with a fixing arm, and cylindrical a wheel fork is disposed on said fixing arm; a hollow rotation wheel, rotatably sleeved on said wheel fork; a restricting sleeve, with its one end defining a sleeve connection portion, and with its other end defining a ring-shape blocking portion, said sleeve connection portion is sleeved and fixed onto the outer perimeter of said wheel fork, and is located between said wheel fork and said hollow rotation wheel, such that said ring-shape blocking portion is on one side of said hollow rotation wheel; and a restricting and fastening ring, fastened around the outer perimeter of said wheel fork, and located on other side of said hollow rotation wheel, said restricting and fastening ring and said ring-shape blocking portion restrict lateral movement of said hollow rotation wheel.