Control vehicle toy drive train for pivoting turns

A drive unit of a vehicle toy, comprising:

• a motor;
• a motor gear driven in forward and reverse directions of rotation by said motor;
• first and second drive gears for independently driving left and right wheels of the vehicle toy;
• first and second intermediate gears for reducing in rotational speed said first and second drive gears;
• idle gear meshed with one of said first and second intermediate gears to cause said first and second drive gears to be rotating in directions opposite to each other;
• a travelling gear meshing with said motor gear and driven by said motor gear to travel along a path between a forward-drive position and a turn-drive position depending on the rotational direction of said motor gear;
• said travelling gear directly driving both said first and second drive gears in said forward-drive position;
• said travelling gear driving said first and second drive gears through said first and second intermediate gears and said idler gear in said turn-drive position;
• and
• said travelling gear comprising a planetary gear in constant mesh with said motor gear, and two further gears on each side of and coaxial with said planetary gear, said further gears moving into and out of mesh with said drive gears and said intermediate gears.

A vehicle toy, comprising:

• a body with left and right wheels mounted respectively on left and right sides of said body;
• a reversible motor;
• a motor gear driven by said motor;
• first and second drive gears for independently driving the left and right wheels;
• first and second intermediate reduction gears connected to said first and second drive gears, respectively;
• an idler gear meshed with one of said first and second intermediate gears to enable said first and second drive gears to be rotated via said intermediate gears in directions opposite to each other;
• a travelling gear arrangement with gear means in constant mesh with said motor gear and driven by said motor gear to travel in either direction along an arcuate path between a forward-drive position and a turn-drive position depending on the rotational direction of said reversible motor;
• said travelling gear arrangement being mounted on a swing arm;
• said travelling gear arrangement driving said first and second drive gears in the same rotational direction when in said forward-drive position;
• said travelling gear arrangement, when in said turn-drive position, driving said first and second drive gears in opposite rotational directions through said first and second intermediate gears and said idler gear;
• and
• said travelling gear arrangement gear means when in said turn-drive position driving said first and second drive gears via said intermediate reduction gears at a higher reduction ratio than when in said forward-drive position, said intermediate reduction gears being inoperative in driving said first and second drive gears in said forward-drive position.

A vehicle toy, comprising:

• a body with left and right wheel mounted respectively on left and right sides of said body;
• a reversible motor;
• a motor gear driven by said motor;
• first and second drive gears for independently driving the left and right wheels;
• first and second intermediate gears connected to said first and second drive gears, respectively;
• an idler gear meshed with one of said first and second intermediate gears to enable said first and second drive gears to be rotated in directions opposite to each other;
• a travelling gear arrangement in constant mesh with said motor gear and driven by said motor gear to travel in either direction along an arcuate path between a forward-drive position and a turn-drive position depending on the rotational direction of said reversible motor;
• said travelling gear arrangement driving said first and second drive gears in the same rotational direction when in said forward-drive position;
• said travelling gear arrangement, when in said turn-drive position, driving said first and second drive gears in opposite rotational directions through said first and second intermediate gears and said idler gear;
• and
• a toothed rack fixedly disposed in an intermediate position between said forward-drive position and said turn-drive position, said travelling gear assembly meshing with said rack as said travelling gear travels along said path.

A vehicle toy, comprising:

• a body with left and right wheels mounted respectively on left and right sides of said body;
• a reversible motor;
• a motor gear driven by said motor;
• first and second drive gears for independently driving the left and right wheels;
• first and second intermediate gears connected to said first and second drive gears, respectively;
• an idler gear meshed with one of said first and second intermediate gears to enable said first and second drive gears to be rotated in directions opposite to each other;
• a travelling gear arrangement in constant mesh with said motor gear and driven by said motor gear to travel in either direction along an arcuate path between a forward-drive position an a turn-drive position depending on the rotational direction of said reversible motor;
• said travelling gear arrangement driving said first and second drive gears in the same rotational direction when in said forward-drive position;
• said travelling gear arrangement, when in said turn-drive position, driving said first and second drive gears in opposite rotational directions through said first and second intermediate gears and said idler gear;
• and
• said travelling gear assembly comprising a central planetary gear in mesh with said motor gear, two first reduction gears coaxially disposed on one side of said planetary gear, and two second reduction gears coaxially disposed on the opposite side of said planetary gear.