Apparatus for opening and closing tailgate for vehicle

1. An apparatus for opening and closing a tailgate for a vehicle, the apparatus comprising:

a latch device provided in the tailgate, the latch device including:

a claw to engage with a striker provided at a vehicle body side,

a pawl to engage with the claw to maintain the claw in a locked position, and

an unlocking lever to operate the pawl configured to unlock the claw engaged with the pawl; and

an actuator including a cinching/release lever to selectively operate a cinching cable and a release cable, the cinching cable being connected to the claw to rotate the claw from an unlocked position to the locked position, and the release cable being connected to the unlocking lever to operate the claw from the locked position to the unlocked position,

wherein the cinching/release lever includes slots formed at upper and lower sides of the cinching/release lever and in a substantially circular arc shape, an end of the cinching cable is movably disposed in one of the slots, and an end of the release cable is movably disposed in another one of the slots so that as a gear apparatus is rotated in a forward direction or a reverse direction, the cinching/release lever selectively pulls the cinching cable or the release cable.

2. The apparatus of claim 1 , wherein the actuator includes:

the gear apparatus operated by a single motor to rotate in the forward direction or the reverse direction, wherein the cinching/release lever selectively pulls the cinching cable or the release cable in accord with a rotation direction of the gear apparatus to lock or unlock the latch device.

3. The apparatus of claim 2 , wherein:

the actuator includes a housing,

the gear apparatus is installed in the housing and operates the cinching/release lever,

the gear apparatus includes a planetary gear device, the single motor operating the planetary gear device, and a worm gear provided on an output shaft of the single motor.

4. The apparatus of claim 3 , wherein the planetary gear device includes:

a sun gear which has gear teeth formed on a cylindrical outer circumferential surface thereof, engages with the worm gear of the motor, and rotates in the forward direction or the reverse direction;

a ring gear which is coupled inside the sun gear to rotate together with the sun gear, and has gear teeth formed on an inner circumferential surface thereof; and

planet gears which are disposed between upper and lower carrier members rotatably installed to a shaft inside an internal space of the ring gear, and mesh with the ring gear.

5. The apparatus of claim 4 , wherein the sun gear and the planet gears of the planetary gear device have gear ratios that provide force to close the tailgate by using the single motor.

6. The apparatus of claim 4 , wherein the cinching/release lever is coupled to the shaft above the upper carrier member of the planetary gear device and rotated in the forward direction or the reverse direction together with the shaft.