Sliding doors for vehicles

Abstract

The present invention relates to a sliding door for a vehicle. The sliding door is suitable for a door portion where a straight track is difficult to apply, and may include: a door track, a body track, and a moving arm, wherein the door track is installed in a door configured to be closed to a body in a vertical direction of the vehicle; the body track is installed in a body to which the door is closed in a longitudinal direction of the vehicle; and the moving arm has one end movably connected along the door track in a vertical direction to open or close the door in a transverse direction of the body during movement, and the other end movably connected along the body track in a longitudinal direction to allow the door to slide along the longitudinal direction of the body during movement.

Description

Technical Field

[0001] The present invention relates to a sliding door for a vehicle, which is suitable for a door portion where a straight track is difficult to apply. Background Art

[0002] In passenger vehicles and vans for leisure use, sliding doors are employed which are opened or closed by pushing the sliding doors in a longitudinal direction.

[0003] The linear rail is fixed to the vehicle body and the door in the front-rear direction thereof, and the sliding door is fixed to the vehicle body through a roller and hinge structure, so that the door can be guided to open and close in a sliding mode along the trajectory of the rail.

[0004] However, the conventional sliding door has a problem that the track of the door is exposed to the interior of the vehicle, thereby reducing the aesthetic feeling in the interior design of the vehicle. In addition, in addition to the door glass, it is difficult to configure the layout of the interior of the door.

[0005] Since the rail is in a straight shape, the rail can be applied to the rear door, but there is a disadvantage in that it is difficult to apply the rail to the front door whose roof side portion is formed to be inclined downward.

[0006] The information disclosed in the background technology section of the present invention is only intended to enhance the understanding of the general background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0007] Various aspects of the present invention are directed to providing a sliding door for a vehicle that is suitable for a door portion where it is difficult to apply a straight track due to design.

[0008] According to one aspect, a sliding door for a vehicle is provided, the sliding door comprising: a door track, a body track and a moving arm, the door track being installed in the door in the vertical direction of the vehicle, the door being configured to be closed to the body; the body track being installed in the body to which the door is closed in the longitudinal direction of the vehicle; the moving arm having one end movably connected along the door track in the vertical direction to open or close the door in the lateral direction of the body during movement, and the other end movably connected along the body track in the longitudinal direction to enable the door to slide in the longitudinal direction of the body during movement.

[0009] A rack may be provided along the door track, and the gear module is connected to the rack in a gear meshing structure at one end of the moving arm to move in a vertical direction while rotating one end of the moving arm.

[0010] The gear module may include: a module housing, a driving external gear, a driven external gear and an intermediate external gear, wherein the module housing is connected to the door track and is guided by the door track to slide in its vertical direction; the driving external gear is axially connected to the module housing and meshes with the rack; the driven external gear is axially connected to the module housing and fixed to one end of the moving arm; the intermediate external gear is axially connected to the module housing and meshes between the driving external gear and the driven external gear, and is configured to transmit the rotational force of the driving external gear to the driven external gear.

[0011] The sliding door may further include a motor configured to supply a driving force to the driving outer gear.

[0012] When the gear module moves from one end to the other end of the entire vertical movement interval, the transmission ratio between the rack and the driven external gear can be configured to allow the moving arm to rotate from one end to the other end of the entire rotation interval.

[0013] The door track may be mounted on an inner surface of the door frame, and the body track may be mounted on an outer surface of the pillar.

[0014] The body rail may be installed in a curved shape along an A-pillar or a C-pillar of the vehicle body, and the door rail may be vertically installed in a portion of the door frame corresponding to a B-pillar of the vehicle body.

[0015] A guide slit can be formed on the surface of the body rail facing the vehicle door along its longitudinal direction, one end of the roller part can be connected to the other end of the moving arm with a ball joint structure, the middle part of the roller part can pass through the guide slit, and the roller arranged at the other end of the roller part can be inserted into the body rail and guided to move along the body rail.

[0016] The body rail may be formed in a twisted shape in a longitudinal direction thereof, a guide slit of the body rail adjacent to the B-pillar may be formed to face a lower end portion of the door rail, and a guide slit of the body rail remote from the B-pillar may be formed to face an upper end portion of the door rail.

[0017] The methods and apparatus of the present invention have other features and advantages that will be apparent from, or will be described in detail in, the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram showing a state in which a door according to various exemplary embodiments of the present invention slides to open when viewed from the outside of the vehicle;

[0019] Figure 2A , Figure 2B and Figure 2C is a schematic diagram for describing the opening and closing operation relationship of a vehicle door according to various exemplary embodiments of the present invention;

[0020] Figure 3 is a schematic diagram showing an exemplary embodiment of a gear meshing structure inside a gear module and supplying a driving force of a motor to the gear module according to various exemplary embodiments of the present invention;

[0021] Figure 4 is a schematic diagram showing another exemplary embodiment of supplying a driving force of a motor to a gear module according to various exemplary embodiments of the present invention;

[0022] Figure 5 is a schematic diagram for describing an operational relationship of rotating a moving arm when a gear module moves vertically according to various exemplary embodiments of the present invention;

[0023] Figure 6 is a schematic diagram for describing a structure in which a roller portion is inserted into a vehicle body rail to move according to various exemplary embodiments of the present invention;

[0024] Figure 7 2 is a schematic diagram illustrating a twisted shape of a vehicle body rail according to various exemplary embodiments of the present invention.

[0025] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features illustrating the basic principles of the present invention. The specific design features of the present invention contained herein (including, for example, specific dimensions, directions, locations, and shapes) will be determined in part by the specific intended application and use environment.

[0026] In the figures, like reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0027] Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments of the present invention, it should be understood that this specification is not intended to limit the present invention to those exemplary embodiments. On the other hand, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternative embodiments, modified embodiments, equivalent embodiments or other embodiments, which are included in the spirit and scope of the present invention as defined by the appended claims.

[0028] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] The sliding door according to various exemplary embodiments of the present invention has a sliding door structure configured to be independent of the design line of the vehicle. The sliding door is adapted to be installed at an upper track portion at the upper end portion of the vehicle door 10. For reference, track portions may be formed even at the lower end portion and the middle portion of the vehicle door 10. These track portions may be adapted in the form of an existing straight track structure.

[0030] Figure 1 is a schematic diagram showing a state in which a vehicle door 10 according to various exemplary embodiments of the present invention slides to open when viewed from the outside of the vehicle, Figure 2A , Figure 2B and Figure 2C 1 is a schematic diagram for describing the opening and closing operation relationship of a vehicle door 10 according to various exemplary embodiments of the present invention. The vehicle door 10 includes a door track 100, a vehicle body track 200, and a moving arm 400.

[0031] Referring to the accompanying drawings, the present invention includes: a door track 100, a body track 200 and a moving arm 400, wherein the door track 100 is installed in the door 10 in the vertical direction of the vehicle, wherein the door 10 is closed to the body 20; the body track 200 is installed in the body 20 to which the door is closed in the longitudinal direction of the vehicle; one end of the moving arm 400 is connected to be movable along the door track 10 in the vertical direction and connected to open and close the door 10 along the lateral direction of the body 20 during the movement, and the other end is connected to be movable in the front-rear direction along the body track 200 so that the door 10 can slide along the longitudinal direction of the body 20 during the movement.

[0032] For example, the door rail 100 is vertically mounted on the inner surface of the door 10 facing the vehicle interior, and the body rail 200 is mounted on the outer surface of the vehicle body 20 facing the vehicle exterior in the front-rear direction thereof. In addition, it is configured so that one end of the moving arm 400 moves vertically along the door rail 100, and the other end moves along the body rail 200 in the front-rear direction thereof.

[0033] That is, in a state in which the door 10 is closed, one end of the moving arm 400 is located at the lowermost end portion of the door rail 100 , and the other end is located at a distal end portion of one side of the vehicle body rail 200 .

[0034] In the above state, when a force for opening the door 10 is provided, one end of the moving arm 400 moves upward along the door track 100 to apply a force for pushing the door 10. In the current process, the door 10 moves in the lateral direction of the vehicle body 20 so that a gap is generated between the door 10 and the vehicle body 20.

[0035] Furthermore, when a pushing force is applied to the door 10 toward the distal portion on the other side of the body rail 200 , the other end of the moving arm 400 moves along the body rail 200 so that the door 10 can slideably move in a direction corresponding to the distal portion to open the door 10 .

[0036] Alternatively, when the door 10 is closed in the open state, the door 10 and the moving arm 400 may be moved in a reverse order to that described above to close the door 10 .

[0037] As described above, according to the various exemplary embodiments of the present invention, when the vehicle door 10 is opened, the moving arm 400 moves along the door rail 100 installed in the vertical direction to adjust the distance between the vehicle body 20 and the vehicle door 10. Therefore, since it is not necessary to configure the rail in the front-rear direction of the vehicle door 10, the sliding door can be applied even in the vehicle door 10 in which it is difficult to configure the rail due to the layout problem of the interior of the vehicle door 10. The sliding door can be applied even to the front portion of the vehicle door 10 in which the roof side portion is formed in a curved shape rather than a straight shape in terms of design.

[0038] Furthermore, since the amount of lateral movement of the door 10 is determined according to the length of the moving arm 400 , it is sufficient to ensure that the gap between the vehicle body 20 and the door 10 reaches a desired level when the door 10 is opened.

[0039] also, Figure 3 1 is a schematic diagram showing an exemplary embodiment of a gear meshing structure inside a gear module 300 and supplying a driving force of a motor M to the gear module 300 according to various exemplary embodiments of the present invention. The door track 100 and the moving arm 400 are connected by the gear meshing structure so that the moving arm 400 moves vertically along the door track 100.

[0040] For description with reference to the drawings, the rack gear 110 is provided at a middle portion of the door rail 100 along the door rail 100 .

[0041] In addition, the gear module 300 is connected to the rack 110 at one end of the moving arm 400 in a gear meshing structure to form a structure that allows the gear module 300 to move vertically while rotating one end of the moving arm 400.

[0042] That is, when the force for opening the vehicle door 10 is supplied to the gear module 300, the gear in the gear module 300 is connected to the rack 110 in a gear meshing structure so that the gear module 300 moves vertically along the rack 110 and rotates the moving arm 400 connected to the gear module 300.

[0043] To describe the structure of the gear module 300 in detail, the gear module 300 includes: a module housing 310, a driving external gear 320, a driven external gear 350 and an intermediate external gear, wherein the module housing 310 is guided by the door track 100 to slide vertically; the driving external gear 320 is axially connected to the module housing 310 and meshes with the rack 110; the driven external gear 350 is axially connected to the module housing 310 and fixed to one end of the moving arm 400; the intermediate external gear is axially connected to the module housing 310 and meshes between the driving external gear 320 and the driven external gear 350 to transmit the rotational force of the driving external gear 320 to the driven external gear 350.

[0044] For example, the module housing 310 is formed in a shape covering a portion of the front surface of the door rail 100. Rail grooves 313 are formed on both side surfaces of the door rail 100, and rail protrusions 316 inserted into the rail grooves 313 are formed at both sides of the module housing 310, so that the module housing 310 can be coupled to the door rail 100 to slideably move in a vertical direction thereof.

[0045] Furthermore, in the module case 310 , a driving external gear 320 , a plurality of intermediate external gears, and a driven external gear 350 are axially coupled to both sides of the module case 310 and rotate, and these externally meshing gears are connected to each other in an external meshing structure.

[0046] That is, the driving external gear 320 is connected to the lower end portion of the module housing 310 in a meshing structure to be connected to the rack 110, the first intermediate external gear 330 is externally meshed with the front side of the driving external gear 320, the second intermediate external gear 340 is externally meshed with the first intermediate external gear 330, and the driven external gear 350 is externally meshed upwardly with the second intermediate external gear 340.

[0047] Furthermore, one end portion of the moving arm 400 is fixed to the driven external gear 350 , so that the moving arm 400 rotates according to the rotation of the driven external gear 350 .

[0048] In the present case, the externally meshed gear may be a gear having a shape in which two gears having different outer diameters overlap coaxially. This may be a shape that takes into account the transmission ratio between the externally meshed gears. Therefore, when the externally meshed gears satisfy the transmission ratio required by the design, the externally meshed gears may each be formed in the shape of a simple pinion.

[0049] That is to say, reference Figure 5 , when the driving external gear 320 rotates in the clockwise direction and moves upward along the rack 110, the first intermediate external gear 330 rotates in the counterclockwise direction, the second intermediate external gear 340 rotates in the clockwise direction, and the driven external gear 350 rotates in the counterclockwise direction.

[0050] Therefore, the gear module 300 moves upward and the moving arm 400 rotates in the counterclockwise direction, so that the door 10 is separated from the vehicle body 20. On the other hand, when the gear module 300 moves downward and the moving arm 400 rotates in the clockwise direction, the door 10 approaches the vehicle body 20.

[0051] In addition, the operation of opening the door 10 from the vehicle body 20 may be achieved by a manual method or an automatic method.

[0052] That is, as described above, when the door 10 is manually pulled from the outside of the vehicle in a state where the door 10 is closed, the gear module 300 moves upward while the moving arm 400 rotates in the counterclockwise direction so that the door 10 can be opened from the vehicle body 20 .

[0053] Also, when the vehicle door 10 is automatically opened, it may be configured to further include a motor M that supplies a driving force to the driving outer gear 320 .

[0054] As an illustrative example, Figure 3 As shown, the driving shaft of the motor M is coupled to the shaft of the driving external gear 320 so that the rotational force of the motor M is directly supplied to the driving external gear 320. Therefore, the driving external gear 320 moves along the rack 110 so that the moving arm 400 can rotate.

[0055] Figure 4 2 is a schematic diagram illustrating another exemplary embodiment in which a driving force of a motor is supplied to a gear module 300 according to various exemplary embodiments of the present invention.

[0056] Referring to the drawings, the pulley is connected to the transmission shaft of the motor M, and the module housing 310 of the gear module 300 is coupled to the middle portion of the transmission belt b. However, even in the present case, the structure of the external meshing gear in the gear module 300 may be configured as Figure 3 The structure shown.

[0057] That is, when the rotation force of the motor M is supplied to the pulley p to move the driving belt b, the module case 310 moves vertically. Therefore, the driving outer gear 320 moves along the rack 110 so that the moving arm 400 can rotate.

[0058] In addition, according to various exemplary embodiments of the present invention, the transmission ratio between the rack 110 and the driven external gear 350 can be configured so that when the gear module 300 moves from one end to the other end of the entire vertical movement range, the moving arm 400 rotates from one end to the other end of the entire rotation range.

[0059] That is, when the driving external gear 320 reaches from one end of the moving range to the other end, a transmission ratio is configured between the gears meshing with each other so that the moving arm 400 reaches from one end of the rotation range to the other end according to the arrival of the driving external gear 320.

[0060] This can be expressed by the following formula.

[0061] Y=aX

[0062] Y: Transmission ratio between rack and driving external gear

[0063] X: Transmission ratio between the driven external gear and the second intermediate external gear

[0064] a: Transmission ratio between the driving external gear and the second intermediate external gear

[0065] Meanwhile, according to various exemplary embodiments of the present invention, the door rail 100 may be installed on the inner surface of the door frame 12 , and the body rail 200 may be installed on the outer surface of the pillar.

[0066] The body rail 200 may be installed in a curved shape along the A-pillar 22 or the C-pillar of the vehicle body 20 , and the door rail 100 may be vertically disposed in a portion of the door frame 12 corresponding to the B-pillar 24 of the vehicle body 20 .

[0067] Figure 6 2 is a schematic diagram for describing a structure in which a roller portion 410 is inserted into a vehicle body rail 200 to move according to various exemplary embodiments of the present invention.

[0068] Referring to the drawings, according to various exemplary embodiments of the present invention, a guide slit 210 is formed on a surface of a body rail 200 facing a door 10 along a longitudinal direction.

[0069] In addition, one end of the roller portion 410 is coupled to the other end of the moving arm 400 with a ball joint structure 420 .

[0070] In addition, a middle portion of the roller portion 410 passes through the guide slit 210 so that a roller provided at the other end portion of the roller portion 410 is inserted into the body rail 200 and guided to move along the body rail 200 .

[0071] For example, the vehicle body rail 200 is formed in a rectangular cross-sectional tube shape whose interior is hollow, and the roller rolls and moves in a state of being in contact with the inner surface of the vehicle body rail 200 .

[0072] The center roller 412 may be provided at the center portion of the other end portion of the roller portion 410 to be rolled while being in contact with the inner wall surface of the body rail 200 in the front-rear direction thereof. In addition, the side rollers 414 may be provided at both sides of the center roller 412 to be rolled while being in contact with the inner wall surface of the body rail 200 in the vertical direction thereof.

[0073] That is, when a force is provided to move the door 10 in the opening direction (a separate motor may be used) in a state where the door 10 is separated along the lateral direction of the vehicle body 20, the center roller 412 and the side roller 414 may contact the inner wall surface of the vehicle body rail 200 to be rolled and moved so that the movable arm 400 may move along the vehicle body rail 200.

[0074] In an exemplary embodiment of the present invention, the rotational axis of the center roller 412 is aligned perpendicular to the rotational axis of the side rollers 414 .

[0075] A spherical portion 413 is formed at one end of the roller portion 410, and a spherical groove portion 415 for receiving a sphere of the spherical portion 413 is formed at the other end of the moving arm 400, so that the spherical portion 413 and the spherical groove portion 415 are coupled in a spherical joint structure 420. Thus, when the moving arm 400 moves along the vehicle body rail 200, the bending movement of the other end of the moving arm 400 moving downward can be absorbed by the spherical joint structure 420.

[0076] Therefore, the body rail 200 of a curved shape is installed in the front of the vehicle door 10 to which a straight rail is difficult to apply in terms of design, and it is configured to move the moving arm 400 along the body rail 200. Furthermore, the sliding door can be applied even to the front of the vehicle door 10.

[0077] also, Figure 7 1 is a schematic diagram showing a twisted shape of a vehicle body rail 200 according to various exemplary embodiments of the present invention. The vehicle body rail 200 may be formed in a twisted shape in the longitudinal direction so that an opening direction of the guide slit 210 close to the B-pillar 24 may be formed to face the lower end portion of the door rail 100, and an opening direction of the guide slit 210 away from the B-pillar 24 may be formed to face the upper end portion of the door rail 100.

[0078] For example, when the sliding door is implemented in the front door portion, the body rail 200 is installed in a built-in structure in a portion of the body 20 forming the A-pillar 22. The opening direction of the guide slit 210 is formed downward at the rear side of the body rail 200, so that the opening direction of the guide slit 210 is formed toward the lateral direction at the front side of the body rail 200 due to the twisted shape of the body rail 200.

[0079] That is, when the door 10 moves forward, the gear module 300 moves to the upper portion of the door track 100 so that one end of the moving arm 400 connected to the gear module 300 gradually becomes higher and the other end of the moving arm 400 gradually becomes lower.

[0080] Thus, when the moving arm 400 moves forward along the body rail 200 , the opening direction of the guide slit 210 is formed to face the gear module 300 , so that the moving arm 400 moves smoothly along the body rail 200 without bending or damaging the moving arm 400 .

[0081] As described above, according to the various exemplary embodiments of the present invention, when the vehicle door 10 is opened, the moving arm 400 moves along the door rail 100 installed in the vertical direction to adjust the distance between the vehicle body 20 and the vehicle door 10. Therefore, since it is not necessary to configure the door rail 100 in the front-rear direction of the vehicle door 10, the sliding door can be applied even in the vehicle door 10 in which it is difficult to configure the rail due to the layout problem of the interior of the vehicle door 10. Even for the front portion of the vehicle door 10 in which the roof side portion is formed in a curved shape rather than a straight shape in terms of design, the sliding door can be applied.

[0082] Furthermore, since the amount of lateral movement of the door 10 is determined according to the length of the moving arm 400 , it is sufficient to ensure that the gap between the vehicle body 20 and the door 10 reaches a desired level when the door 10 is opened.

[0083] According to various aspects of the present invention, when the door is opened, the moving arm moves along the door track installed in the vertical direction to adjust the distance between the vehicle body and the door. Since it is not necessary to configure the door track in the longitudinal direction of the door, it is advantageous that the sliding door can be applied to a door that is difficult to configure the track due to the layout problem inside the door. In addition, it is advantageous that the sliding door can be applied even to the front portion of the door whose roof side portion is formed in a curved shape rather than a straight shape in terms of design.

[0084] In addition, since the lateral movement amount of the door is determined according to the length of the moving arm, when the door is opened, it is sufficient to ensure that the gap between the vehicle body and the door reaches a desired level.

[0085] For ease of interpretation and precise definition in the appended claims, the terms "upper", "lower", "inner", "outer", "upward", "downward", "upwardly", "downwardly", "front", "rear", "backside", "inner side", "outer side", "inwardly", "outwardly", "inner", "outer", "inner", "external", "forward", and "rearward" are used to describe features of the exemplary embodiments shown in the figures with reference to their positions. It will be further understood that the term "connect" or its derivatives refer to both direct and indirect connections.

[0086] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise embodiments disclosed, and it is apparent that various modifications and variations may be made in light of the foregoing teachings. The exemplary embodiments selected and described are intended to explain certain principles of the present invention and their practical applications, so that other persons skilled in the art can make and use various exemplary embodiments of the present invention, and alternatives and modifications thereof. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sliding door device for a vehicle, the sliding door device include: a door track installed in a door configured to be closed to a vehicle body in a vertical direction of the vehicle; a body rail installed in the vehicle body to which the door is closed in the longitudinal direction of the vehicle; as well as A moving arm having a first end and a second end, wherein the first end is movably connected along the door track in a vertical direction so as to open or close the door in a lateral direction of the vehicle body during movement of the moving arm, and the second end is movably connected along the vehicle body track in a longitudinal direction so as to slide the door in the longitudinal direction of the vehicle body during movement of the moving arm.

2. The sliding door device for a vehicle according to claim 1, in: A rack is installed along the door track; The gear module is gear-engaged to the rack at the first end portion of the moving arm to move in a vertical direction and rotate the first end portion of the moving arm.

3. The sliding door device for a vehicle according to claim 2, in, The gear module comprises: a module housing coupled to the door track and guided by the door track to slide in a vertical direction; a drive gear rotatably coupled to the module housing and meshing with the rack; a driven gear rotatably coupled to the module housing and fixed to the first end of the moving arm; and An intermediate gear is rotatably coupled to the module case and meshes with the drive gear and the driven gear, and is configured to transmit a rotational force of the drive gear to the driven gear.

4. The sliding door device for a vehicle according to claim 3, further comprising: include: A motor is coupled to the driving gear and configured to supply a driving force to the driving gear.

5. The sliding door device for a vehicle according to claim 4, further comprising: include: a first pulley fixed to a transmission shaft of the motor; a second pulley rotatably mounted to the door track; as well as A drive belt is coupled to the first pulley and the second pulley and connected to the module housing.

6. The sliding door device for a vehicle according to claim 3, in, When the gear module moves from one end to the other end of the entire vertical movement interval, the transmission ratio between the rack and the driven gear is configured to enable the moving arm to rotate from one end to the other end of the entire rotation interval.

7. The sliding door device for a vehicle according to claim 1, in: The door track is mounted on the inner surface of the door frame; The vehicle body rail is mounted on the outer surface of the vehicle pillar.

8. The sliding door device for a vehicle according to claim 1, in: The body rail is installed in a curved shape along the A-pillar or C-pillar of the body; The door rail is vertically installed in a portion of the door frame corresponding to a B-pillar of the vehicle body.

9. The sliding door device for a vehicle according to claim 8, in: A guide slit is formed along a longitudinal direction on a surface of the body rail facing the door; The first end of the roller portion is coupled to the second end of the moving arm in a ball joint structure; A middle portion of the roller portion passes through the guide slit, and a roller provided at a second end portion of the roller portion is inserted into the vehicle body rail and guided to move along the vehicle body rail.

10. The sliding door device for a vehicle according to claim 9, in, The body rail is formed in a twisted shape along its longitudinal direction, a guide slit of the body rail adjacent to a B-pillar is formed to face a lower end portion of the door rail, and a guide slit of the body rail away from the B-pillar is formed to face an upper end portion of the door rail.

11. The sliding door device for a vehicle according to claim 9, in, A spherical portion is formed at a first end portion of the roller portion, and a spherical recess portion for receiving a sphere of the spherical portion is formed at a second end portion of the moving arm so that the spherical portion and the spherical recess portion are coupled in a spherical joint structure.

12. The sliding door device for a vehicle according to claim 9, in, The roller is formed in plurality, including a first side roller, a center roller and a second side roller.

13. The sliding door device for a vehicle according to claim 12, in, The rotation axis of the center roller is aligned perpendicular to the rotation axes of the first and second side rollers.

14. The sliding door device for a vehicle according to claim 1, in, Rail grooves are formed on first and second side surfaces of the door rail, and rail protrusions inserted into the rail grooves are formed at first and second sides of a module housing so that the module housing is coupled to the door rail to slideably move in a vertical direction.

Images