Castor with brake for use in a mobile structure

摘要

A caster includes a support (11) to be secured to a mobile structure. An inverted U-shaped wheel frame (20) has an upper portion (204) and two legs (201) which extend downward from the upper portion (204). A bearing unit (30) is disposed between the upper portion (204) and the support (11). A pinion (14) is disposed between the legs (201) beneath the upper portion (204). A rivet (13) extends non-rotatably through the support (11) and the pinion (14) and extends rotatably through the upper portion (204). A pedal assembly (40) includes two arms (41) and a platform (46) which interconnects front ends (411) of the arms (41). Each arm (41) has a generally S-shaped guide slot (42) that crosses a horizontal guide slot (21) of a corresponding one of the legs (201). The pedal assembly (40) is flanked by the wheel frame (20) and is mounted pivotally on the latter. A shaft (60) extends into and is movable in the guide slots (21), (42). A wheel (50) is mounted on the shaft (60). A brake (45) has two ends secured to the arms (41) of the pedal assembly (40). The brake (45) is provided with a rack unit (48) thereon and is movable to result in frictional engagement with the wheel (50) and in engagement between the rack unit (48) and the pinion (14) in response to movement of the shaft (60).