Abstract: A power transmission mechanism of a model vehicle capable of mechanically performing accurate straight running and turning control without relying upon the output characteristic of each drive system in an RC tank having two drive systems. The power transmission mechanism comprises a motor (10) for traveling providing a drive force for traveling, a motor (30) for turning providing a drive force for turning, a left side differential gear (40) and a right side differential gear (50) to which the rotations of the motor (10) for traveling and the motor (30) for turning are transmitted, and a center differential gear (80) to which the rotation of the motor (30) for turning is transmitted. The turning is performed by using the left side differential gear (40), the right side differential gear (50), and the center differential gear (80).

Abstract: A suspension structure that is easily processed and assembled, and by which production cost of the suspension structure can be reduced. A suspension structure (1) is installed at the inner bottom surface of a vehicle body (71). A bar-like member (20) is formed of a steel wire and has predetermined torsional elasticity. At both ends of the bar-like member (20), the steel wire is bent into an annular shape to form a first annular section (21) and a second annular section (22). The first annular section (21) is fixed to a projection section (75) on the inner bottom surface of the vehicle body (71). A pivot shaft (30) is attached to the second annular section (22). A swing arm (50) is attached to the other end side of the pivot shaft (30), and the swing arm (50) pivots together with the pivot shaft (30) in the range that the torsional elasticity of the bar-like member (20) allows.

Abstract: The power transmission mechanism has a first gear secured to an input shaft. A second gear connectable to the input shaft through a clutch mechanism is provided around the input shaft through a one-way clutch that allows the input shaft to rotate freely in the direction of rotation of the driving force from the engine when the clutch mechanism is in a disengaged state but does not permit rotation of the second gear relative to the input shaft in an opposite direction. A brake mechanism is provided to restrain the rotation of the second gear. A third gear is in mesh with the first gear. A fourth gear is in mesh with the second gear. The power transmission mechanism further has first to third bevel gears. The gear ratio between the first and third gears is equal to that between the second and fourth gears.

Abstract: A power transmission mechanism for use in a toy vehicle with an engine that realizes a smooth shift between a forward operation and a reverse operation with a relatively simple structure is provided. The power transmission mechanism has a first gear secured to an input shaft. A second gear connectable to the input shaft through a clutch mechanism is provided around the input shaft through a one-way clutch that allows the input shaft to rotate freely in the direction of rotation of the driving force from the engine when the clutch mechanism is in a disengaged state but does not permit rotation of the second gear relative to the input shaft in a direction opposite to the rotational direction of the driving force. A brake mechanism is provided to restrain the rotation of the second gear. A third gear is in mesh with the first gear. A fourth gear is in mesh with the second gear. The power transmission mechanism further has first to third bevel gears.