Electric damper for vehicle

1. An electric damper for a vehicle, comprising:

a housing body fixed to a vehicle body;

a gear bar including a first end coupled to a knuckle of a wheel, and a second end extending into the housing body, with a rack gear provided on a side surface of the gear bar;

a first intersection gear unit installed in a direction intersecting a movement direction of the gear bar and configured to engage with the rack gear and rotate;

a first power transmitting gear unit configured to engage with the first intersection gear unit and rotate, and including a rotating shaft installed parallel to the gear bar;

a rotator configured to engage with the first power transmitting gear unit and rotate, and provided in a shape enclosing an outer surface of the gear bar; and

a stator installed in the housing body at a position facing the rotator and having a magnetic force.

2. The electric damper of claim 1 , wherein the first intersection gear unit comprises:

a first pinion gear rotatably installed at a position facing the gear bar, and configured to engage with the rack gear and rotate; and

a first connection gear extending from the first pinion gear and having a conical gear shape.

3. The electric damper of claim 2 , wherein a rotating shaft of the first pinion gear is installed in a direction perpendicularly intersecting the moving direction of the gear bar.

4. The electric damper of claim 2 , wherein the first power transmitting gear unit comprises:

a first bevel gear including a rotating shaft intersecting a rotating shaft of the first connection gear and having a conical gear shape; and

a first transmitting gear extending from the first bevel gear and including gear teeth engaging with an outer surface of the rotator, and configured to rotate along with the rotator.

5. The electric damper of claim 4 , wherein the rotating shaft of the first bevel gear is installed parallel to the gear bar and perpendicular to the rotating shaft of the first connection gear.

6. The electric damper of claim 1 , further comprising:

a second intersection gear unit installed at a position facing the first intersection gear unit with the gear bar disposed therebetween, and configured to engage with the rack gear and rotate; and

a second power transmitting gear unit including a rotating shaft installed parallel to the gear bar, and suitable for engaging with the second intersection gear unit and rotating, the second power transmitting gear unit being configured to engage with the outer surface of the rotator and rotate along with the first power transmitting gear unit.

7. The electric damper of claim 6 , wherein the second intersection gear unit comprises:

a second pinion gear rotatably installed at a position facing the gear bar, and configured to engage with the rack gear and rotate; and

a second connection gear extending from the second pinion gear and having a conical gear shape.

8. The electric damper of claim 7 , wherein the second power transmitting gear unit comprises:

a second bevel gear including a rotating shaft intersecting a rotating shaft of the second connection gear, the second bevel gear having a conical gear shape; and

a second transmitting gear extending from the second bevel gear and configured to engage with the outer surface of the rotator and rotate.

9. The electric damper of claim 8 , wherein the rotating shaft of the second bevel gear is installed parallel to the gear bar and perpendicular to the rotating shaft of the second connection gear.

10. The electric damper of claim 6 , wherein the rotator and the stator are installed on each of wheels of a four-wheel-drive vehicle and configured to control an installation length and a moving speed of the gear bar.

11. The electric damper of claim 1 , wherein a bellows pipe is installed around a portion of the gear bar that protrudes out of the housing body, and a knuckle bracket is coupled to a portion of the gear bar that protrudes out of the bellows pipe.