Patent ID: 7707686

Claim:
A truckle assembly comprising: a housing including a body, and a sleeve on an end of the body and communicating with interior of the body, a through hole being defined through opposite sides of the body, a slope portion defined to extend across an inward facing interior surface of the body and an inward facing interior surface of the sleeve; a rotating unit movably mounted on the sleeve of the housing, and including a central shaft, and a gear ring mounted on the central shaft for corresponding to the slope portion; a limiting unit including a pedal, an interferential portion linking an end of the pedal and having a meshing portion adjacent the slope portion, and an arresting portion linking an end of the interferential portion, the pedal having a first portion extending into the housing, and a second portion extending out of the housing, the interferential portion being positioned to contact and move upwards along the slope portion from an unlocked position towards the sleeve into a locked position to mesh the meshing portion with the gear ring, the arresting portion having two sides respectively extending out of the through hole of the housing; and a wheel assembly including at least a wheel assembled on sides of the housing, and a shaft pole extending through the at least a wheel and the pedal, each wheel forming a toothed portion adjacent the housing for corresponding to the arresting portion.