Patent ID: 7293620
Filing Date: 2007-11-13
Classification: A61G,Y10S

Abstract:
1. A front wheel stabilizing device for an electric motor-driven wheeled vehicle, the wheeled vehicle having a main frame for supporting a vehicle seat thereon, and a pair of front drive wheels mounted proximate to a front side of the main frame to be rotatable relative thereto about a driving wheel axis in a transverse direction for propelling the wheeled vehicle along a ground surface, said front wheel stabilizing device comprising: a mount adapted to be secured to the front side of the main frame, and having two side plates which are spaced apart from each other in the transverse direction; an axle disposed between said side plates, and extending along a pivot axis in the transverse direction to interconnect said side plates; a wheel mounting member having a tubular head which is sleeved on and which is rotatable relative to said axle about the pivot axis, and a cantilever arm which extends from said tubular head forwardly to terminate at a wheel-carrying end; a stabilizing wheel which is rollably mounted on said wheel-carrying end to be rollable about a stabilizing wheel axis parallel to the pivot axis, and which can yield under a jolting force that arises as a result of movement of said stabilizing wheel over an uneven ground surface so as to displace from a more tractive position, where said stabilizing wheel travels with more traction, to a less tractive position; and at lease one torsion spring having a coiled segment which is wound on said tubular head about the pivot axis, and two urging ends which are connected to opposite sides of said coiled segment, and which abut against said mount and said cantilever arm, respectively, so as to bias said stabilizing wheel downwardly, thereby restoring said stabilizing wheel from the less tractive position to the more tractive position.