Two-stage opening structure of a vehicle door

Abstract

To provide a door two stage opening structure of a vehicle.SOLUTION: A door two stage opening structure of a vehicle of the invention includes: a first stage door which is rotated and opened with reference to a first hinge part; a second stage door which is rotated and opened integrally with the first stage door with reference to a second hinge part; a motor module part which applies driving force to the first hinge part or the second hinge part; a cross member in which the motor module part is located; and a slide unit configured so that the cross member moves integrally with the motor module part. The cross member moves along the slide unit and the motor module part is selectively fastened to the first hinge part or the second hinge part.SELECTED DRAWING: Figure 1a

Description

Technical Field

[0001] The present invention relates to a two-stage opening structure of a vehicle door, and more preferably, to a two-stage opening structure of a vehicle door that can open and close a second-stage door by directly using the opening structure of the first-stage door.

Background Art

[0002] Automobile doors come in various types. Among them, there are the swing type mainly applied to passenger cars, the slide type mainly applied to medium-sized vans, and the hatchback type mainly applied to the tailgates of vans and RVs. On the other hand, as a future mobility that expands living space, Purpose Built Vehicle (hereinafter referred to as "PBV") has emerged. For example, when a PBV composed of a shoe store and a clothing store docks at a hub, the hub becomes a shopping center. The expandability of functions and designs based on the purpose of PBV is quite large. PBV is a new type of mobility that is neither a public transportation means such as a bus nor an individual passenger car, and is used as a flexible space where the purpose of the hub itself changes depending on which purpose PBV docks at the hub.

[0003] For higher utilization of such PBVs, a dual-opening structure of the door according to the surrounding environment is required. For example, when only passengers get off or there are space constraints such as a low ceiling, it is necessary to open the door only partially. On the contrary, for example, when loading bulky luggage, it is necessary to configure the door to fully open by extending the opening.

[0004] The conventional upward single-opening and closing tailgate has a one-piece structure, and there is a problem that the entire tailgate rotates at the same angle by one hinge when opening and closing. Furthermore, when opening the door, there are also problems such as the hinge part being pushed or the hinge arm being loosened.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made to solve the above problems, and an object of the present invention is to provide a door opening structure capable of selectively opening a first-stage door and a second-stage door by the driving force of one motor module unit. Another object of the present invention is to provide a cross member that can be selectively fastened to a first hinge portion and a second hinge portion by sliding movement of a motor module unit.

Means for Solving the Problems

[0007] The two-stage door opening structure of a vehicle according to the present invention includes a first-stage door that is rotationally opened with respect to a first hinge portion, a second-stage door that is rotationally opened integrally with the first-stage door with respect to a second hinge portion, a motor module unit that applies a driving force to the first hinge portion or the second hinge portion, and a cross member on which the motor module unit is located.

[0008] It further includes a slide unit configured such that the cross member moves integrally with the motor module unit, and the cross member is configured to move along the slide unit so that the motor module unit is selectively fastened to the first hinge portion or the second hinge portion.

[0009] The slide unit includes a rail portion that is located on the vehicle body and is configured such that at least a part of the cross member is inserted and moves, and a guide portion that is located on the rail portion and is configured such that the cross member rotates.

[0010] The protruding portion located on the cross member is configured to be in contact with the guide portion so that the cross member rotates and moves along the rail portion.

[0011] It further includes a fixing member located at at least one end of the cross member adjacent to the vehicle body, extending along the longitudinal direction of the cross member, and inserted inside the vehicle body.

[0012] The fixing member is inserted into a first insertion groove provided in the vehicle body corresponding to the position where the motor module portion is fastened to the first hinge portion.

[0013] The fixing member is inserted into a second insertion groove provided in the vehicle body corresponding to the position where the motor module portion is fastened to the second hinge portion.

[0014] The motor module portion includes a fastening portion selectively fastened to the first hinge portion or the second hinge portion, a housing fixed to the cross member integrally with the fastening portion, and a driving portion located inside the housing and applying a driving force to the fastening portion.

[0015] When the housing moves along the slide unit, the cross member is configured to rotate so that the fastening portion contacts the first hinge portion and the second hinge portion respectively.

[0016] It further includes a first bracket located between the first hinge portion and the second-stage door.

[0017] It further includes a fixing pin passing through the first hinge portion and the first bracket to fix the first hinge portion.

[0018] It is characterized in that the through hole of the first hinge part is composed of at least two corresponding to the open state or the closed state of the door.

[0019] It further includes a second bracket located between the second hinge part and the vehicle body.

Advantages of the Invention

[0020] The present invention can be structurally simplified by the two-stage door opening structure of a vehicle equipped with a motor module part. The present invention can ensure stability by fixing the opening of the first-stage door and prevent the door from sagging.

Brief Description of the Drawings

[0021]

Fig. 1a

Fig. 1b

Fig. 1c

Fig. 1d

Fig. 2

Fig. 3a

Fig. 3b

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

[0022] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

[0023] Embodiments of the present invention can be modified into various forms and are not limited to these embodiments. Terms such as “… part”, “… unit”, “… member” described in the specification are units that process at least one function or operation. The names of the components are classified as “first”, “second”, etc. only to distinguish them because the names of the components are in the same relationship. The “door” includes both a door that opens in the front-rear direction of the vehicle and a door that opens bidirectionally in the width direction of the vehicle. This specification targets one end of the door that opens in the width direction of the vehicle. The “closed state” is a state in which the first-stage door 100 and the second-stage door 300 are both closed. The “open state of the first-stage door 100” is a state in which the first-stage door 100 rotates upward with respect to the cross member and is opened, and the second-stage door 300 is closed. The “open state of the second-stage door 300” is a state in which the second-stage door 300 is opened integrally with the first-stage door 100 in a state where the first-stage door 100 is opened or closed. The “upward direction” refers to the height direction on the drawing.

[0024] The present invention relates to a two-stage opening structure of a vehicle door. FIG. 1a shows a perspective view of a vehicle including a two-stage opening structure of a vehicle door, and FIG. 1b shows a closed state of the door of the two-stage opening structure of a vehicle door according to an embodiment of the present invention.

[0025] The first - stage door 100 and the second - stage door 300 are configured to be located on at least one of both sides of the vehicle and are configured to be rotationally opened upward with respect to the vehicle. More preferably, the first - stage door 100 is rotationally opened upward with reference to one end of the second - stage door 300, and the second - stage door 300 is configured to be rotationally opened upward with reference to the vehicle body frame located on the roof of the vehicle. Referring to FIG. 1b, in the two - stage door opening structure of the vehicle according to an embodiment of the present invention, the first - stage door 100 or the second - stage door 300 can be configured to be opened as required. The first - stage door 100 can be configured to be rotationally opened with reference to one end of the first hinge portion 200. More preferably, one end of the first hinge portion 200 is connected to the first bracket 110 fastened to the second - stage door 300, and the first hinge portion 200 is configured to rotate about a point where the first hinge portion 200 is fastened to the first bracket 110. In this way, the first - stage door 100 is rotationally opened upward with respect to the vehicle, and is configured such that its height is limited in the fully - opened state, and the first - stage door 100 can be fully opened or closed even in a space with a low ceiling.

[0026] The first hinge portion 200 is fixed inside the second - stage door 300 via the first bracket 110, and the other end is fastened inside the first - stage door 100, and can be configured to transmit an opening force to the first - stage door 100 so that the first - stage door 100 is rotationally opened. A pair of the first hinge portions 200 may be formed on both side surfaces of the first - stage door 100. The second - stage door 300 can be configured to be rotationally opened integrally with the first - stage door 100 with reference to one end of the second hinge portion 400. More preferably, the second - stage door 300 is rotationally opened upward with respect to the vehicle integrally with the first - stage door 100, and the entire opening area of the vehicle can be opened. As a result, there is an effect that it is easy to secure space when loading bulky luggage.

[0027] The second hinge portion 400 can be configured such that one end is fixedly formed on the vehicle body frame and the other end is fastened to one end inside the second-stage door 300, thereby transmitting an opening force to the second-stage door 300 to open the second-stage door 300. A pair of the second hinge portions 400 may be formed in the width direction of the vehicle body frame. More preferably, the second hinge portion 400 is fastened to the vehicle body via the second bracket 310, and the second-stage door 300 is configured to be rotated and opened integrally with the first-stage door 100 about a point of the second hinge portion 400 fastened to the second bracket 310.

[0028] The first hinge portion 200 is configured to be relatively located on the outer contour of the vehicle compared to the second hinge portion 400, and the second hinge portion 400 can be relatively located inside the vehicle. More preferably, in the case of a vehicle configured with a gullwing door, the first hinge portion 200 is configured to be located relatively outside the vehicle compared to the second hinge portion 400. The first-stage door 100 of the present invention can be located in the height direction of the vehicle so as to face the side surface of the vehicle, and the second-stage door 300 can extend from the end of the first-stage door 100 in the width direction or the length direction of the vehicle and be configured to be located adjacent to the vehicle body frame located at the center of the roof of the vehicle.

[0029] FIG. 1c shows an open state of the first-stage door of the two-stage door open structure of a vehicle according to an embodiment of the present invention, and FIG. 1d shows an open state of the second-stage door of the two-stage door open structure of a vehicle according to an embodiment of the present invention.

[0030] Referring to FIGS. 1c and 1d, the two-stage door open structure of a vehicle according to an embodiment of the present invention can include a motor module unit 500 that applies a driving force to the first hinge portion 200 or the second hinge portion 400, a cross member 600 to which the motor module unit 500 is fastened, and a slide unit 700 that is located on the vehicle body and at least a part of the cross member 600 is located so that the motor module unit 500 moves in the width direction of the vehicle. The motor module unit 500 includes a fastening portion 510 configured to apply a driving force to the first hinge portion 200 or the second hinge portion 400. More preferably, the fastening portion 510 of the motor module unit 500 is fastened to the first hinge portion 200 when the first-stage door 100 is opened, and transmits the rotational force from the motor module unit 500 to the first hinge portion 200. The first hinge portion 200 receiving the transmission of the rotational force is configured to rotationally open the first-stage door 100 with one end of the second-stage door 300 as a reference.

[0031] Also, since the motor module unit 500 is configured to move along the slide unit 700 integrally with the cross member 600, the second hinge portion 400 located at the other end of the second-stage door 300 comes into contact with the fastening portion 510, and the rotational force of the motor module unit 500 is applied to the second hinge portion 400. The second hinge portion 400 receiving the applied rotational force can be configured such that the second-stage door 300 is rotationally opened integrally with the first-stage door 100 with an end of the second bracket 310 fixed to the vehicle body as a reference.

[0032] The cross member 600 can be formed by being coupled to the motor module unit 500. The cross member 600 is configured to extend in the width direction of the door. More preferably, the cross member 600 can be positioned perpendicular to the longitudinal direction of the first-stage door 100 or the second-stage door 300. According to the illustrated drawing, the first-stage door 100 and the second-stage door 300 are respectively positioned in the height direction and the width direction of the vehicle, and the cross member 600 is configured to be positioned along the longitudinal direction of the vehicle. Further, in an embodiment of the present invention, the cross member 600 is configured to move between a position where the first-stage door and the second-stage door are adjacent and a position where the second-stage door and the vehicle body frame are adjacent. The cross member 600 is coupled to be movable along the slide unit 700 integrally with the motor module unit 500.

[0033] The slide unit 700 is configured to be located on both sides of the vehicle body along the width direction of the second-stage door 300, and at least a part of the cross member 600 is inserted and located inside the slide unit 700. The cross member 600 that moves along the length direction of the slide unit 700 along the slide unit 700 can be selectively fastened to the first hinge part 200 and the second hinge part 400, and the cross member 600 is configured such that the motor module part 500 is located at a position where the first hinge part 200 and the second hinge part 400 are adjacent. Further, the cross member 600 includes a protruding part 610 configured to face the guide part 720 located on the rail part 710, so that the cross member 600 is configured to rotate at a position where the protruding part 610 contacts the guide part 720.

[0034] Therefore, when the cross member 600 is located at one end of the slide unit 700, one end of the motor module part 500 is fastened to the first hinge part 200 and the first-stage door 100 can be opened. When the cross member 600 moves and rotates along the slide unit 700 to the other end of the rail part 710, the same one end of the motor module part 500 is fastened to the second hinge part 400 and the second-stage door 300 can be opened. Or, with the first-stage door 100 in a closed state, the motor module part 500 and the cross member 600 move along the slide unit 700 and the motor module part 500 is fastened to the second hinge part 400, whereby the second-stage door 300 can be opened. Thus, the second-stage door 300 can be opened by using the motor module part 500 that provides driving force for opening the first-stage door 100.

[0035] FIG. 2 shows a side cross-sectional view of a two-stage door opening structure of a vehicle according to an embodiment of the present invention. FIG. 3a shows an enlarged view of a rail part 710 where the cross member 600 moves while being located on the vehicle body, and FIG. 3b shows an operation diagram in which a protruding part 610 located at the upper end of the cross member 600 contacts the guide part 720 and rotates.

[0036] In the present invention, the first-stage door 100 and the second-stage door 300 are located in the vehicle width direction, and include a second hinge portion 400 such that the second-stage door 300 is opened with reference to the central portion in the vehicle width direction. Further, as an embodiment of the present invention, in a state where the door is closed, the motor module unit 500 can be positioned in a state of being fastened to a first hinge portion 200 having one end located inside the first-stage door 100 and the other end fixed inside the second-stage door 300. Another embodiment of the present invention can include a motor module unit 500 that is fastened to the second hinge portion 400 in a state where the door is closed.

[0037] When a door opening request is applied, the motor module unit 500 is configured to open the first-stage door 100 or the second-stage door 300. More preferably, in response to the opening request of the first-stage door 100 applied to the control unit, one end of the first hinge portion 200 and the motor module unit 500 are positioned to be fastened, and in response to the opening request of the second-stage door 300 applied to the control unit, one end of the second hinge portion 400 and the motor module unit 500 are configured to be fastened.

[0038] More preferably, since the motor module unit 500 moves along slide units 700 located on both sides of the vehicle body of the second-stage door 300, the slide units 700 include a rail portion 710 located between the first hinge portion 200 and the second hinge portion 400, a cross member 600 that moves integrally with the motor module unit 500 inside the rail portion 710, and a guide portion 720 located on the rail portion 710 so that the cross member 600 rotates on the rail portion 710. The motor module unit 500 includes a fastening portion 510 that is selectively fastened to the first hinge portion 200 and the second hinge portion 400, and a driving portion 530 that provides a driving force to the fastening portion 510. Further, the housing 520 is configured to enclose the driving portion 530, the fastening portion 510 is located outside the housing 520, and the driving force of the driving portion 530 located inside the housing 520 is transmitted thereto.

[0039] When the cross member 600 moves along the rail portion 710 of the slide unit 700, it is configured to rotate by the guide portion 720. Therefore, in order to open the second-stage door 300, the housing 520 of the motor module portion 500 moves in the longitudinal direction along the rail portion 710 corresponding to the user's operation, and one end of the housing 520 facing the first hinge portion 200 rotates by the guide portion 720 and is configured to face the second hinge portion 400. More preferably, the upper end of the cross member 600 includes a protruding portion 610, and the guide portion 720 is formed at the center of the rail portion 710 adjacent to the protruding portion 610. Therefore, at the position where the protruding portion 610 contacts the guide portion 720, the cross member 600 is configured such that the other end rotates about one end in contact with the protruding portion 610. Further, the lower end of the rail portion 710 adjacent to the guide portion 720 includes a groove portion 730 to provide a predetermined space for the cross member 600 to rotate.

[0040] In one embodiment of the present invention, since one end of the housing 520 facing the first hinge portion 200 and the second hinge portion 400 is configured identically to each other, the cross member 600 is configured to rotate 180 degrees while moving in the longitudinal direction of the rail portion 710. Therefore, one end of the motor module portion 500 fixed to the cross member 600 is configured to selectively contact the first hinge portion 200 and the second hinge portion 400, respectively. The guide portion 720 is located on the rail portion 710 and on the upper surface of the rail portion 710 corresponding to the groove portion 730 located on the rail portion 710. Therefore, the protruding portion 610 at the upper end of the cross member 600 contacts the guide portion 720, and the lower end of the cross member 600 is configured to rotate with reference to the upper end or the protruding portion 610 of the cross member 600, and the end portion of the rotating cross member 600 is configured to move along the inside of the groove portion 730.

[0041] That is, when the cross member 600 and the motor module part 500 move integrally, the rail part 710 includes a guide part 720 configured to contact a protruding part 610 positioned at the upper end of the cross member 600. When the protruding part 610 contacts the guide part 720, the cross member 600 rotates with the protruding part 610 as a reference, and the housing 520 is configured to be aligned in a direction in which the fastening part 510 faces the second hinge part 400.

[0042] In this way, after the fastening part 510 positioned at one end of the housing 520 is fastened to the first hinge part 200, the motor module part 500 rotates integrally with the cross member 600 and is positioned so as to face the second hinge part 400. That is, through the rotation of the motor module part 500 including the fastening part 510 connected to one drive part 530, the first hinge part 200 and the second hinge part 400 are configured to be selectively fastened to one fastening part 510.

[0043] FIG. 4 shows a fixing member 620 positioned at at least one of both ends of the cross member 600. The fixing member 620 is positioned with at least a part thereof inserted into the end of the cross member 600, and includes an extension lobe 630 on at least one surface of the cross member 600 so as to extend in the longitudinal direction of the cross member 600. More preferably, the fixing member 620 is positioned to contact the inner peripheral surface of the cross member 600 and is configured with a predetermined interval so as to be movable in the longitudinal direction of the cross member 600.

[0044] The fixing member 620 can be selectively inserted and fixed into the insertion groove 740 located inside the rail part 710 facing both ends of the cross member 600. The insertion groove 740 located on the inner surface of the rail part 710 includes a first insertion groove 741 formed at a position where the first hinge part 200 and the fastening part 510 are in contact, and a second insertion groove 742 formed at a position where the second hinge part 400 and the fastening part 510 are in contact. The fixing member 620 can be manually pulled into the inside of the insertion groove 740 by the operation of the lobe 630 for fixing. Or, since it can include an actuator or a motor etc. that is fixed to the cross member 600 and fastened to the end of the fixing member 620 to apply a driving force, the fixing member 620 can automatically extend to the outside in the length direction of the cross member 600 and be pulled into the inside of each insertion groove 740 for fixing. In a state where the fixing member 620 is released from the insertion groove 740, the cross member 600 can freely move in the length direction of the rail part 710 along the rail part 710. More preferably, the cross member 600 of the present invention is configured to move along the rail part 710 in response to a manual input of a user.

[0045] FIG. 5 shows a coupling structure of the first-stage door 100 including a fixing pin 220 configured to fix the first hinge part 200. As shown in the figure, since the first hinge part 200 is fastened to the second-stage door 300 via the first bracket 110, it includes a fixing pin 220 that passes through the first bracket 110 and the first hinge part 200 to limit the rotation of the first hinge part 200. The fixing pin 220 is inserted through the through hole 210 located in the first hinge part 200 and the fixing hole located in the first bracket 110 at the same time, so the through hole 210 can be configured with at least two corresponding to the open state and the closed state of the first-stage door 100. That is, since the fixing pin 220 is inserted into the through hole 210 and the fixing hole to integrally fix the first hinge part 200 and the first bracket 110, it is configured to be able to maintain the open state or the closed state of the first-stage door 100. Also, even when the second-stage door 300 is opened, the first-stage door 100 can be fixed so as to provide the safety of the first-stage door 100.

[0046] In FIG. 6, in order to open the second-stage door 300, a coupling relationship is shown in which the fastening portion 510 is fastened to the second hinge portion 400. The second hinge portion 400 is fixed to the vehicle body frame via the second bracket 310, and at least a part of the second hinge portion 400 is configured to be in contact with the fastening portion 510 of the motor module portion 500. More preferably, in an embodiment of the present invention, the housing 520 of the motor module portion 500 moves to a position adjacent to the side surface of the second hinge portion 400, and at one end of the moved housing 520, the fastening portion 510 can be positioned so as to be fastened to the second hinge portion 400.

[0047] The fastening portion 510 is gear-coupled to the second hinge portion 400 and is configured to transmit the rotational force applied from the drive portion 5 through the second hinge portion 400. Therefore, since the fastening portion 510 rotates and the end portion of the second hinge portion 400 gear-coupled to the fastening portion 510 can rotate up and down in the vehicle height direction, the opening and closing of the second-stage door 300 are configured to be controlled. The fixing member 620 located on at least one side of the cross member 600 is inserted into the second insertion groove 742 formed inside the rail portion 710 corresponding to the position where the second hinge portion 400 and the fastening portion 510 of the second-stage door 300 are fastened, so as to integrally fix the cross member 600 and the motor module portion 500.

[0048] As described above, in the present invention, a motor module unit 500 including one drive unit 530 slides integrally with a cross member 600 along a rail unit 710, rotates integrally with the cross member 600 on the rail unit 710, and one fastening unit 510 can be selectively fastened to a first hinge unit 200 and a second hinge unit 400, respectively, providing a two-stage open structure for a vehicle door. In FIGS. 7 and 8, as another embodiment of the present invention, a first hinge unit 200 fastened to a first-stage door 100, a first motor module unit 501 connected to and fixed to the first hinge unit 200, and a first cross member 601 located at the first motor module unit 501 and configured in the width direction of the first-stage door 100 and fixed to both side surfaces of a vehicle body adjacent to the first-stage door 100 are included. Further, a second hinge unit 400 fastened to a second-stage door 300, a second motor module unit 502 connected to the second hinge unit 400, and a second cross member 602 located at the second motor module unit 502 and configured in the width direction of the second-stage door 300 and fixed to both side vehicle bodies of the second-stage door 300 are included. That is, a first motor module unit 501 fastened to the first hinge unit 200 of the first-stage door 100 is located, and a second motor module unit 502 fastened to the second hinge unit 400 of the second-stage door 300 is independently configured.

[0049] In addition, the configurations of the motor modules 501 and 502 and the hinge parts 200 and 400 can include the same configurations as those of an embodiment of the present invention described with reference to FIGS. 1a to 7. The first cross member 601 includes a first fixing pin 221 configured to fix the first hinge part 200, so that the opening and closing states of the first-stage door 100 can be maintained. Further, the second cross member 602 includes a second fixing pin 222 configured to fix the second hinge part 400, whereby the opening and closing states of the second-stage door 300 are fixed. One end of the first hinge part 200 is fastened via a first bracket 110 fixed to the second-stage door 300, and thus includes a first fixing pin 221 that passes through the first bracket 110 and the first hinge part 200 to limit the rotation of the first hinge part 200. Further, one end of the second hinge part 400 is fastened via a second bracket 310 fixed to the vehicle body, and thus includes a second fixing pin 222 that passes through the second bracket 310 and the second hinge part 400 to limit the rotation of the second hinge part 400.

[0050] The fixing pins are inserted through the through holes 210 located in the respective hinge parts and the fixing holes located in the respective brackets 110 and 310 at the same time. Therefore, the through holes 210 can be composed of at least two corresponding to the respective door open states and closed states. That is, the first fixing pin 221 is inserted into the through hole 210 and the fixing hole at the same time so that the first hinge part 200 and the first bracket 110 can be integrally fixed, and the second fixing pin 222 can integrally fix the second hinge part 400 and the second bracket 310. Accordingly, the opening or closing states of the first-stage door 100 and the second-stage door 3 are maintained. The configuration fastened by the respective fixing pins can include a coupling relationship substantially the same as that of an embodiment of the present invention disclosed in FIGS. 1a to 7.

[0051] The above description is illustrative of the present invention. Further, although it shows a preferred embodiment of the present invention, it is not limited thereto, and various combinations and modifications are possible.

Description of Reference Numerals

[0052] 100 First-stage door 110 First bracket 200 First hinge part 210 Through hole 220 Fixed pin 221 First fixed pin 222 Second fixed pin 300 Second-stage door 310 Second bracket 400 Second hinge part 500 Motor module part 501 First motor module part 502 Second motor module part 510 Fastening part 520 Housing 530 Driving part 600 Cross member 601 First cross member 602 Second cross member 610 Protrusion 620 Fixing member 630 Lobe 700 Slide unit 710 Rail part 720 Guide part 730 Groove part 740 Insertion groove 741 First insertion groove 742 Second insertion groove

Claims

1. A first-stage door that rotates and opens with reference to the first hinge portion, A second-stage door that rotates and opens integrally with the first-stage door with reference to the second hinge portion, A motor module unit that applies a driving force to the first hinge portion or the second hinge portion, A cross member where the motor module unit is located, A slide unit configured such that the cross member moves integrally with the motor module unit, A fastening portion provided in the motor module unit and selectively fastened to the first hinge portion or the second hinge portion, characterized in that it includes a two-stage open structure for a vehicle door.

2. The cross member is configured to move along the slide unit so that the motor module unit is selectively fastened to the first hinge portion or the second hinge portion, characterized in that it is the two-stage open structure for a vehicle door according to Claim 1.

3. The slide unit A rail portion located on the vehicle body and configured such that at least a part of the cross member is inserted and moves, A guide portion located on the rail portion and configured such that the cross member rotates, characterized in that it includes a two-stage open structure for a vehicle door according to Claim 2.

4. A protruding portion located on the cross member is configured to be in contact with the guide portion so that the cross member rotates and moves along the rail portion, characterized in that it is the two-stage open structure for a vehicle door according to Claim 3.

5. It further includes a fixing member located at at least one end of the cross member adjacent to the vehicle body, extending along the length direction of the cross member and inserted inside the vehicle body, characterized in that it is the two-stage open structure for a vehicle door according to Claim 1.

6. The fixing member is inserted into a first insertion groove provided in the vehicle body corresponding to the position where the motor module unit is fastened to the first hinge portion, characterized in that it is the two-stage open structure for a vehicle door according to Claim 5.

7. The fixing member is inserted into a second insertion groove provided in the vehicle body corresponding to the position where the motor module unit is fastened to the second hinge portion, characterized in that it is the two-stage open structure for a vehicle door according to Claim 5.

8. The motor module unit A housing fixed to the cross member integrally with the fastening portion and located, A driving portion located inside the housing and applying a driving force to the fastening portion, The two-stage opening structure of the vehicle door according to claim 1, further comprising

9. The vehicle door two-stage opening structure according to claim 8, wherein when the housing moves along the slide unit, the cross member rotates so that the fastening portions are respectively in contact with the first hinge portion and the second hinge portion.

10. The two-stage opening structure of the vehicle door according to claim 1, further comprising a first bracket located between the first hinge portion and the second-stage door.

11. The two-stage opening structure of the vehicle door according to claim 10, further comprising a fixing pin that passes through the first hinge portion and the first bracket to fix the first hinge portion.

12. The two-stage opening structure of the vehicle door according to claim 11, wherein the through holes of the first hinge portion are constituted by at least two holes corresponding to the open state or the closed state of the first-stage door.

13. The two-stage opening structure of the vehicle door according to claim 1, further comprising a second bracket located between the second hinge portion and the vehicle body.

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