Patent ID: 6694835
Filing Date: 2004-02-24
Classification: A63H,F16H,Y10T

Abstract:
A power transmission mechanism for use in a toy vehicle with an engine, comprising:an input shaft capable of transmitting rotational driving force from an engine; an output shaft capable of transmitting the rotational driving force to a driving wheel of the toy vehicle; a first gear secured to said input shaft; a second gear connectable to said input shaft through a clutch mechanism, said second gear being provided around said input shaft through a one-way clutch that allows said input shaft to rotate freely in a direction of rotation of the driving force from the engine when said clutch mechanism is in a disengaged state but does not permit rotation of said second gear relative to said input shaft in a direction opposite to the direction of rotation of the driving force from the engine; a brake mechanism for restraining rotation of said second gear; a third gear provided around said output shaft, said third gear being in mesh with said first gear; a fourth gear provided around said output shaft, said fourth gear being in mesh with said second gear; a first bevel gear secured to said output shaft; a second bevel gear provided on said output shaft in a free state to face said first bevel gear, said second bevel gear being secured to said third gear; and a third bevel gear provided at a fixed position with respect to said fourth gear, said third bevel gear being in mesh with both said first bevel gear and said second bevel gear; wherein a gear ratio between said first gear and said third gear is equal to a gear ratio between said second gear and said fourth gear.