Four-bar linkage apparatus for preventing sliding door for vehicle from swaying

1. An apparatus for preventing a sliding door for a vehicle from swaying, the apparatus comprising:

a rail installed on a lower portion of a vehicle body;

an arm bracket attached to a door panel of a door configured to be assembled to the vehicle body;

a slider installed to be slidable in a front-rear direction on the rail;

a first arm hingedly coupled at a first side to the arm bracket and hingedly coupled at a second side to a first side of the slider;

a second arm hingedly coupled at a first side to the arm bracket and hingedly coupled at a second side to a second side of the slider; and

a latch part installed on the slider and configured to adjust rotations of the first arm and the second arm;

wherein the first arm and the second arm, which are hingedly coupled to the slider that is configured to slide when the door is opened, are configured to push the door toward an outside of the vehicle body while being spread and deployed during a first stage operation of opening the door; and

wherein the slider is configured to slide on the rail to fully open the door by moving the door pushed toward the outside of the vehicle body during a second stage operation of opening the door.

2. The apparatus of claim 1 , wherein the rail comprises:

a boss formed at a first end of the rail and having a shape protruding upward; and

a rail striker formed downward from a bottom surface of the boss.

3. The apparatus of claim 1 , wherein:

the slider has a box-shaped housing;

an insertion protrusion is formed on an upper surface at a first side of the housing, and a pair of internal insertion protrusions is formed on upper and lower surfaces, respectively, at a second side of the housing;

a long hole having an extension surface at an upper side thereof and a stepped projection at a lower side thereof is formed at the first side of the housing; and

a flange protruding in a direction of the arm bracket is formed integrally with the extension surface, and the latch part is coupled to a lower portion of the flange.

4. The apparatus of claim 3 , wherein the first arm comprises:

a center bar;

a connecting bar extending by being bent perpendicular at a first side of the center bar and having a coupling hole at an end thereof; and

an insertion hole at a second side of the center bar, wherein the insertion protrusion of the slider is inserted into the insertion hole.

5. The apparatus of claim 3 , wherein the second arm comprises:

a body having a flat plate shape;

an entrance hole at a first side of the body;

internal insertion holes at a second side of the body, wherein the pair of internal insertion protrusions of the slider is inserted into the internal insertion holes; and

an arm striker on an upper surface of the body, wherein the arm striker protrudes upward.

6. The apparatus of claim 1 , wherein:

the slider is configured to support movement of the door while sliding on a channel of the rail when the door is moved rearward or forward; and

the slider is configured to stop sliding when the door is in a fully opened state.

7. An apparatus for preventing a sliding door for a vehicle from swaying, the apparatus comprising:

a rail installed on a lower portion of a vehicle body;

an arm bracket attached to a door panel of a door configured to be assembled to the vehicle body;

a slider installed to be slidable in a front-rear direction on the rail;

a first arm hingedly coupled at a first side to the arm bracket and hingedly coupled at a second side to a first side of the slider;

a second arm hingedly coupled at a first side to the arm bracket and hingedly coupled at a second side to a second side of the slider; and

a latch part installed on the slider and configured to adjust rotations of the first arm and the second arm, the latch part comprising:

a first catching member configured to control a movement of the slider; and

a second catching member configured to control a rotation of the second arm;

wherein the first arm and the second arm, which are hingedly coupled to the slider that is configured to slide when the door is opened, are configured to push the door toward an outside of the vehicle body while being spread and deployed during a first stage operation of opening the door; and

wherein the slider is configured to slide on the rail to fully open the door by moving the door pushed toward the outside of the vehicle body during a second stage operation of opening the door.

8. The apparatus of claim 7 , wherein the latch part further comprises protrusions configured to penetrate a body of the first catching member and a body of the second catching member and having springs interposed between the protrusions and the bodies of the first and second catching members.

9. The apparatus of claim 8 , wherein the first catching member includes:

a meshing surface at a first side of the first catching member in surface contact with the second catching member;

a pair of insertion projections at an upper side of the first catching member;

a projection inner hole between the pair of insertion projections, wherein a rail striker of the rail is inserted in the projection inner hole; and

a catching projection extending from lower portions of the pair of insertion projections.

10. The apparatus of claim 7 , wherein the second catching member includes:

an engagement surface at a first side of the second catching member in surface contact with the first catching member;

a pair of internal insertion projections at a lower side of the second catching member; and

an internal insertion projection inner hole between the pair of internal insertion projections, wherein an arm striker of the second arm is inserted in the internal insertion projection inner hole.

11. The apparatus of claim 10 , further comprising a stopper vertically extending to a lower portion of a flange protruding outward from an extension surface of the slider.

12. The apparatus of claim 11 , wherein:

the second catching member is configured to be rotated when the first arm and the second arm are spread and deployed, and the first catching member is configured to be rotated along with the rotation of the second catching member;

the arm striker of the second arm is configured to be inserted into the internal insertion projection inner hole by the rotation of the second catching member, such that the second catching member is not rotated any further; and

a rail striker, which is caught by a projection inner hole between a pair of insertion projections of the first catching member, is configured to escape from the projection inner hole as the first catching member is rotated, such that the slider coupled to the latch part is slidable and the slider is unlocked.

13. A vehicle comprising:

a vehicle body;

a door coupled to the vehicle body, the door including a door panel;

a rail installed on a lower portion of the vehicle body;

an arm bracket attached to the door panel;

a slider installed to be slidable in a front-rear direction of the vehicle on the rail;

a first arm hingedly coupled at a first side to the arm bracket and hingedly coupled at a second side to a first side of the slider;

a second arm hingedly coupled at a first side to the arm bracket and hingedly coupled at a second side to a second side of the slider; and

a latch part installed on the slider and configured to adjust rotations of the first arm and the second arm;

wherein the first arm and the second arm, which are hingedly coupled to the slider that is configured to slide when the door is opened, are configured to push the door toward an outside of the vehicle body while being spread and deployed during a first stage operation of opening the door; and

wherein the slider is configured to slide on the rail to fully open the door by moving the door pushed toward the outside of the vehicle body during a second stage operation of opening the door.

14. The vehicle of claim 13 , wherein the rail comprises:

a boss formed at a first end of the rail and having a shape protruding upward; and

a rail striker formed downward from a bottom surface of the boss.

15. The vehicle of claim 13 , wherein:

the slider has a box-shaped housing;

an insertion protrusion is formed on an upper surface at a first side of the housing, and a pair of internal insertion protrusions is formed on upper and lower surfaces, respectively, at a second side of the housing;

a long hole having an extension surface at an upper side thereof and a stepped projection at a lower side thereof is formed at the first side of the housing; and

a flange protruding in a direction of the arm bracket is formed integrally with the extension surface, and the latch part is coupled to a lower portion of the flange.

16. The vehicle of claim 15 , wherein the first arm comprises:

a center bar;

a connecting bar extending by being bent perpendicular at a first side of the center bar and having a coupling hole at an end thereof; and

an insertion hole at a second side of the center bar, wherein the insertion protrusion of the slider is inserted into the insertion hole.

17. The vehicle of claim 15 , wherein the second arm comprises:

a body having a flat plate shape;

an entrance hole at a first side of the body;

internal insertion holes at a second side of the body, wherein the pair of internal insertion protrusions of the slider is inserted into the internal insertion holes; and

an arm striker on an upper surface of the body, wherein the arm striker protrudes upward.

18. The vehicle of claim 13 , wherein:

the slider is configured to support movement of the door while sliding on a channel of the rail when the door is moved rearward or forward; and

the slider is configured to stop sliding when the door is in a fully opened state.

19. The vehicle of claim 18 , wherein the latch part comprises:

a first catching member configured to control a movement of the slider;

a second catching member configured to control a rotation of the second arm;

protrusions configured to penetrate a body of the first catching member and a body of the second catching member; and

springs interposed between the protrusions and the bodies of the first and second catching members.

20. The vehicle of claim 19 , wherein the first catching member includes:

a meshing surface at a first side of the first catching member in surface contact with the second catching member;

a pair of insertion projections at an upper side of the first catching member;

a projection inner hole between the pair of insertion projections, wherein a rail striker of the rail is inserted in the projection inner hole; and

a catching projection extending from lower portions of the pair of insertion projections.