Patent ID: 9475368
Filing Date: 2016-10-25
CPC Classification: B60J,E05B,E05C,E05D,E05F,E05Y

Claim Text:
1. A sliding door device for a vehicle, comprising: a front or a rear door configured to be open closed; a central rail mounted on the front or the rear door and straightly extending in a sliding direction of the front or rear door; a central slider coupled to the central rail to support the central rail and to move along the central rail; a lower rail fixedly disposed below the front or rear door and straightly extending in the sliding direction of the front or rear door; a lower slider coupled to the lower rail to move along the lower rail; a central support structure having one end connected to the central slider and another end fixedly disposed to support the sliding movement of the central slider; a lower support structure having one end coupled to the lower slider and another end connected to a lower portion of the front or the rear door to movably support the lower portion of the front door or the rear door; and a hook locking and releasing the central support structure to and from the central rail, wherein the lower support structure includes: a gear device mounted at the lower slider; and a linkage of which one end is connected to the gear device and another end is connected to the front or the rear door, wherein the gear device includes: a rack gear mounted at the lower rail; a gear shaft; a planetary gear box through and into which the gear shaft penetrates and is inserted to be coupled thereto; an input gear coupled to an upper portion of the gear shaft to integrally rotate; an output gear coupled to a lower portion of the gear shaft to integrally rotate and meshed with the rack gear; and a transmission gear meshed with the input gear and mounted at the linkage, the transmission gear having an arc shape, wherein the linkage includes: a first link having a “U”-shaped cross section and one end thereof engaged with the transmission gear; and a second link having one end is connected to another end of the first link and another end of the second link is engaged with the lower portion of the front or the rear door, and wherein the first link and the second link include: a first upper flange and a first lower flange having a first penetrative assembling hole, respectively; and a first side flange connecting the first upper flange and the first lower flange and having a “U”-shaped cross section.