Apparatus for driving rear-wheels of environment-friendly vehicle

An apparatus for driving rear-wheels of an environment-friendly vehicle, which is configured to independently drive each of a first rear wheel and a second rear wheel of a vehicle, the apparatus comprising:

• a rear-wheel driver including a first motor configured to drive the first rear wheel, and a second motor configured to drive the second rear wheel;
• a rear-wheel reducer configured to decelerate drive force of the first motor and drive force of the second motor and transmit the respective decelerated drive forces to the first rear wheel and the second rear wheel;
• a brake configured to releasably fix the rear-wheel reducer to a vehicle body;
• and
• a controller configured to control the rear-wheel driver, the rear-wheel reducer, and the brake such that the first rear wheel and the second rear wheel are independently operated,
• wherein the rear-wheel reducer comprises:
• a first planetary gear set disposed between an output end of the first motor and the first rear wheel;
• a second planetary gear set disposed between an output end of the second motor and the second rear wheel;
• and
• a ring gear coupled at respective opposite sides thereof to the first planetary gear set and the second planetary gear set,
• wherein the first planetary gear set comprises:
• a first carrier coupled to the output end of the first motor;
• a first sun gear coupled to the first rear wheel;
• and
• a plurality of first planetary gears engaging with an outer circumferential surface of the first sun gear and an inner circumferential surface of the ring gear, and
• wherein the second planetary gear set comprises:
• a second carrier coupled to the output end of the second motor;
• a second sun gear coupled to the second rear wheel;
• and
• a plurality of second planetary gears engaging with an outer circumferential surface of the second sun gear and the inner circumferential surface of the ring gear.