Door opening and closing device for vehicle

Abstract

The invention relates to a door opening and closing device for a vehicle. A door opening and closing device for a vehicle, which is configured to open or close a door opening portion by sliding and ejecting a door formed in a vehicle body, includes: a driving unit configured to provide a driving force for a sliding and ejecting operation of the door; a transmission unit configured to receive the driving force from the driving unit and eject the vehicle door; a belt unit configured to receive the driving force from the driving unit and slide a door; and a rail unit engaged with the belt unit and connected to the door, the rail unit configured to provide a path for door sliding by operation of the belt unit.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10 - 2024 - 0006589, filed on January 16, 2024, the entire contents of which are incorporated herein for all purposes by this reference. Technical field

[0003] This application relates to a door opening and closing device for a vehicle, and more particularly, to a two - way door opening and closing device for a vehicle, which is configured to open or close a door opening portion of a vehicle body by sliding and popping out a vehicle door in two directions, front and rear, in a vehicle without a B - pillar. Background art

[0004] Generally, a door for a vehicle is a door that separates the interior and exterior of the vehicle, and plays an important role in protecting the safety of passengers by blocking external noise, rain, dust, wind, etc., and absorbing impact together with the side structure in the event of a side collision.

[0005] Vehicles have various types of doors (including doors for special purposes), but hinge - swing doors are most commonly applied to passenger vehicles.

[0006] Generally, a swing door refers to a door that opens outward from the vehicle body around a hinge axis installed between the vehicle body and the swing door through a hinge bracket. Due to its simple structure, it has the advantages of being easy to open or close, and easy to maintain and repair.

[0007] On the other hand, in some vehicles, reverse - swing doors are applied, which have a high sense of opening when the door is opened and are beneficial for passengers to get on or off the vehicle. The reverse - swing door uses the rotation of an arm connected to the vehicle body and the door to open or close.

[0008] However, although the reverse - swing door has the advantage of a large amount of door opening and closing, due to the length of the arm, there is a problem that the amount protruding outward from the vehicle is too much when the door is opened. In addition, as Figure 1 and Figure 2 shown, in a three - point sliding door / track structure where an upper track U, a central track C, and a lower track L are applied to a vehicle body 1, the door opening amount b is limited according to the length a of the central track C. Considering, for example, the position of vehicle headlights and the design of a short overhang, it is difficult to increase the door opening amount b when the central track C exists. Therefore, there is a problem that the design and packaging freedom of the vehicle are restricted.

[0009] Therefore, as Figure 3 and Figure 4As shown in the vehicle body 1 having the vehicle door 2, it is necessary to maximize the door opening amount c by not applying the center rail at the position "A".

[0010] The information included in the background art section of this application is only intended to enhance the understanding of the general background art of this application and should not be regarded as an admission or an implication in any form that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0011] Aspects of the present application are directed to providing a door opening and closing device for a vehicle, the door opening and closing device being configured to remove a center rail / door arm structure from a reverse sliding door structure of a vehicle without a B-pillar and to implement a sliding and popping operation of the door through an upper rail / door arm structure. Thus, the door opening width is maximized and there are no design and packaging limitations, while the door rotation radius is minimized, and when the door is opened, the amount of protrusion of the door towards the outside of the vehicle body is minimized.

[0012] According to an exemplary embodiment of the present application, a door opening and closing device for a vehicle is configured to open or close a door opening portion by sliding and popping a door formed in a vehicle body. The door opening and closing device includes: a drive unit configured to provide a driving force for the sliding and popping operations of the door; a transmission unit configured to receive the driving force from the drive unit and cause the door to pop; a belt unit configured to receive the driving force from the drive unit and cause the door to slide; and a rail unit engaged with the belt unit and connected to the door, the rail unit being configured to provide a path for the door to slide through the operation of the belt unit.

[0013] The drive unit may include: a drive motor; a clutch connected to the drive motor and configured to rotate by the rotational force of the drive motor; and an electromagnet to which power is supplied or blocked to transmit or block the rotational force of the clutch to the transmission unit by selectively engaging the clutch.

[0014] The clutch may include: a lower plate coaxially engaged with the motor shaft of the drive motor and configured to rotate synchronously with the rotation of the motor shaft; and an upper plate coaxially connected to the motor shaft and configured to rotate or not rotate according to whether the electromagnet contacts the lower plate.

[0015] In response to power being supplied to the electromagnet, the upper plate and the lower plate may contact each other. In response to power not being supplied to the electromagnet, the upper plate and the lower plate may release their contact with each other.

[0016] The drive unit may include: a drive gear coaxially connected to the upper plate, engaging with a lower portion of the rail unit, and configured to rotate synchronously with the upper plate; an intermediate gear meshing with the drive gear and configured to rotate at a lower portion of the rail unit; a lead screw meshing with the intermediate gear and configured to rotate at a lower portion of the rail unit; and a first mounting bracket mounted to the vehicle body, engaging with the lead screw inserted therein, and configured to support the drive unit to move outward of the vehicle body in response to the rotation of the lead screw.

[0017] The door opening and closing device may further include: a first guide rod engaged in the first mounting bracket and connected to a lower portion of a first side of the rail unit, the first guide rod configured to extend in a direction parallel to the lead screw and guide the movement of the lead screw.

[0018] The door opening and closing device may further include: a second mounting bracket mounted to the vehicle body; and a second guide rod connected to a lower portion of a second side of the rail unit and slidably engaged with the second mounting bracket.

[0019] The rail unit may include a first rail, a second rail, and a third rail, the first rail being connected to the drive unit, the second rail being connected to the first rail and configured to slide and move along the first rail, and the third rail being connected to the second rail and configured to slide and move along the second rail.

[0020] The second rail may be configured to slide and move in the longitudinal direction of the first rail by rolling of a roller bearing provided on the second rail, and the third rail may be configured to slide and move in the longitudinal direction of the second rail by rolling of a roller bearing provided on the third rail.

[0021] The belt unit may include: a pulley provided at a lower portion of the first rail and engaged with the drive unit to receive a driving force from the drive unit and rotate; a belt engaged with the pulley and configured to linearly move by the rotation of the pulley; and a belt carrier connected to the belt and configured to linearly move by the movement of the belt.

[0022] The pulley may include: a first pulley coaxially engaged with the motor shaft, configured to rotate synchronously with the rotation of the motor shaft, and the first pulley is connected to rotate at a lower portion of the first rail; and a second pulley connected to rotate at a relative side spaced apart from the first pulley at a lower portion of the first rail.

[0023] The belt carrier may include: a first pinion configured to mesh with and move along a first rack formed on a lower surface of the first rail and extending in the longitudinal direction of the first rail.

[0024] The belt carrier can be connected to a lower portion of the second rail by a joining pin.

[0025] The belt pulley can include: a third belt pulley disposed at a lower portion of the second rail and connected to the first pinion; and a fourth belt pulley connected to rotate on an opposite side of the third belt pulley spaced apart in the lower portion of the second rail.

[0026] The third belt pulley and the fourth belt pulley can be connected to a belt configured to linearly move by rotation of the third belt pulley and the fourth belt pulley.

[0027] The fourth belt pulley can include: a second pinion meshing with a second rack formed to extend in a longitudinal direction of the third rail and configured such that, in response to rotation of the fourth belt pulley, the second pinion rotates to move the third rail in the longitudinal direction.

[0028] According to an exemplary embodiment of the present application, a center rail / door arm structure is removed from a reverse sliding door structure of a vehicle without a B-pillar, and thus, the door opening width can be maximized.

[0029] In addition, an upper rail / door arm structure capable of implementing sliding and pop-up operations of the door is introduced, and thus, the door rotation radius is minimized, such that the amount of protrusion of the door toward the outside of the vehicle body is minimized when the door is opened.

[0030] In addition, a rail unit having a three-stage telescopic structure is applied, and thus, openness and robustness can be ensured simultaneously.

[0031] The methods and apparatuses of the present application have other characteristics and advantages that will be apparent from, or will be described in more detail in, the accompanying drawings and the following detailed description, which are incorporated herein and together serve to explain specific principles of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic view schematically showing a vehicle having a two-way swing door of the related art.

[0033] Figure 2 is a schematic view showing a state in which the door opening amount is limited in a vehicle having a two-way swing door of the related art.

[0034] Figure 3 is a schematic view showing a state in which a center rail is not applied in a vehicle having a two-way swing door of the related art.

[0035] Figure 4It is a schematic diagram showing a state where a central track is not applied to maximize the door opening amount in a vehicle with a bi-directional swing door of the related art.

[0036] Figure 5 It is a schematic diagram showing a state where a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is provided in a vehicle.

[0037] Figure 6 It is a schematic diagram showing a state where a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is provided on a door of a vehicle.

[0038] Figure 7 It is a schematic diagram showing a closed state of a door of a vehicle to which a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is applied.

[0039] Figure 8 It is a schematic diagram showing a pop-up and sliding state of a door of a vehicle to which a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is applied.

[0040] Figure 9 It is a schematic diagram showing a completed open state of a door of a vehicle to which a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is applied.

[0041] Figure 10 It is a schematic diagram showing a door opening / closing device for a vehicle according to an exemplary embodiment of the present application.

[0042] Figure 11 It is a schematic diagram showing a pop-up and sliding operation state of a door opening / closing device for a vehicle according to an exemplary embodiment of the present application by using a driving unit and a transmission unit.

[0043] Figure 12 It is a schematic diagram showing a sliding operation state of a door opening / closing device for a vehicle according to an exemplary embodiment of the present application by using a driving unit and a transmission unit.

[0044] Figure 13 It is a schematic diagram showing a power transmission state of a door opening / closing device for a vehicle according to an exemplary embodiment of the present application by using a clutch of a driving unit.

[0045] Figure 14 It is a schematic diagram showing a power transmission release state of a door opening / closing device for a vehicle according to an exemplary embodiment of the present application by using a clutch of a driving unit.

[0046] Figure 15It is a schematic diagram showing the pop-up and sliding operation states of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application, with power transmission through a clutch.

[0047] Figure 16 It is a schematic diagram showing the sliding operation state of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application, with power transmission release through a clutch.

[0048] Figure 17 It is a front schematic diagram showing a cross-section of a belt unit and a track unit of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application.

[0049] Figure 18 It is a perspective view showing a cross-section of a belt unit and a track unit of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application.

[0050] Figure 19 It is an enlarged view of a belt unit and a track unit of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application.

[0051] Figure 20 It is a schematic diagram showing the state of a second track sliding and moving of a track unit of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application.

[0052] Figure 21 It is a schematic diagram showing the state of a third track sliding and moving of a track unit of a door opening and closing device for a vehicle according to an exemplary embodiment of the present application.

[0053] It should be understood that the attached drawings are not drawn to scale and are merely appropriately simplified drawings for illustrating the basic principles and various features of the present application. The specific design features of the present application disclosed herein, such as specific dimensions, directions, positions, and shapes, will be partially determined by the specific application and usage environment.

[0054] In the drawings, throughout the several views of the drawings, the same reference numerals refer to the same or equivalent parts of the present application. Detailed Description

[0055] Reference will now be made in detail to various embodiments of the present application, examples of which are shown in the accompanying drawings and described below. Although the present application will be described in conjunction with exemplary embodiments of the present application, it should be understood that this specification is not intended to limit the present application to those exemplary embodiments. On the contrary, the present application is intended to cover not only the exemplary embodiments of the present application, but also various alternative embodiments, modified embodiments, equivalent embodiments and other embodiments that may be included within the spirit and scope of the present application as defined by the appended claims.

[0056] Hereinafter, the present application will be described more fully with reference to the accompanying drawings, so that those skilled in the art to which the present application pertains can easily implement the exemplary embodiments of the present application. However, the present application can be implemented in various different forms and is not limited to the exemplary embodiments described herein.

[0057] In addition, for various exemplary embodiments of the present application, in the exemplary embodiments of the present application, the same reference numerals will be used to representatively describe elements including the same structure, and in other exemplary embodiments of the present application, only the structures different from the exemplary embodiments will be described.

[0058] It should be noted that the accompanying drawings are schematic and not drawn to scale. For the sake of clarity and convenience of the drawings, the relative sizes and proportions of the components shown in the drawings are enlarged or reduced in size, and any size is illustrative only and not restrictive. In addition, the same reference numerals are used to represent similar features of the same structure, element or component that appear in two or more drawings. When an element is referred to as being "on" another element, the element can be directly on the other element, or there can be other elements in between.

[0059] The exemplary embodiment of the present application specifically represents an exemplary embodiment of the present application. Therefore, various modifications to the schematic diagrams are expected. Thus, the exemplary embodiments of the present application are not limited to the specific shapes in the shown areas, for example, by modifications in shape during manufacturing.

[0060] Hereinafter, a door opening and closing device for a vehicle according to an exemplary embodiment of the present application will be described in detail with reference to the accompanying drawings.

[0061] Figure 5 is a schematic diagram showing a state in which a door opening and closing device for a vehicle according to an exemplary embodiment of the present application is provided in a vehicle. Figure 6 is a schematic diagram showing a state in which a door opening and closing device for a vehicle according to an exemplary embodiment of the present application is provided on a door of a vehicle. Figure 7FIG. is a schematic view showing a closed state of a vehicle door to which a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is applied. Figure 8 FIG. is a schematic view showing a popped-up and sliding state of a vehicle door to which a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is applied. Figure 9 FIG. is a schematic view showing a fully opened state of a vehicle door to which a door opening / closing device for a vehicle according to an exemplary embodiment of the present application is applied.

[0062] Referring to Figure 5 and Figure 6 FIGS. and, a door opening / closing device 100 for a vehicle according to an exemplary embodiment of the present application opens or closes a door opening portion by sliding and popping up a door 2 formed on a vehicle body 1, and the door opening / closing device 100 for a vehicle is disposed above a door opening portion of the vehicle body 1.

[0063] The door opening / closing devices 100 may be provided in pairs to face each other above corresponding door opening portions of front and rear doors 2, respectively.

[0064] The door opening / closing device 100 may be configured to connect an outer side of the vehicle body 1 and an inner side of the door 2, an outermost rail 34 of a rail unit may be attached to the door 2, and mounting brackets 6 and 9 may be attached to the vehicle body 1.

[0065] In addition, a lower module 3 including a lower rail and a lower arm may be disposed below a door opening portion of the vehicle body 1. The lower module 3 may support the door 2 to pop up, slide, and move while maintaining vertical balance according to the operation of the door opening / closing device 100 for a vehicle according to an exemplary embodiment of the present application.

[0066] As Figures 7 to 9 shown, in a state where the vehicle door 2 is closed, the driving unit operates such that the door 2 pops up and slides and moves to the outside of the vehicle body 1.

[0067] When the popping up of the door 2 is completed, the driving force for popping up the door 2 is blocked by the driving unit and a transmission unit, and the door 2 is slid and moved in the longitudinal direction of the vehicle body 1. Such an operation may be sequentially performed on the front door 2 and the rear door 2, respectively, or may be performed simultaneously.

[0068] Figure 10 FIG. is a schematic view showing a door opening / closing device for a vehicle according to an exemplary embodiment of the present application.

[0069] Referring to Figure 10, according to an exemplary embodiment of the present application, the door opening and closing device 100 for a vehicle may include a driving unit, a transmission unit, a belt unit, and a rail unit.

[0070] The driving unit provides a driving force for the sliding and popping operations of the door 2. The driving unit may include a driving motor 10, clutches 14 and 24, and an electromagnet 11. The driving motor 10 receives a signal for opening or closing the door 2 and generates a rotational force through a motor shaft 12.

[0071] The driving motor 10 is connected to the clutches 14 and 24 (the clutches 14 and 24 are connected to the motor shaft 12 to rotate together), and is connected to the electromagnet 11 (electricity is supplied to the electromagnet 11 or the electricity can be blocked), so as to transmit or block the rotational force of the clutches 14 and 24 to the transmission unit. When electricity is supplied to the electromagnet 11, the clutches 14 and 24 engage to transmit the rotational force of the clutches 14 and 24 to the transmission unit, and when electricity is not supplied to the electromagnet 11 or the electricity is blocked, the clutches 14 and 24 do not engage, so the rotational force of the clutches 14 and 24 is not transmitted to the transmission unit.

[0072] The clutches 14 and 24 may include a lower plate 14 and an upper plate 24. The lower plate 14 is coaxially engaged with the motor shaft 12 of the driving motor 10 and rotates synchronously with the rotation of the motor shaft 12.

[0073] The upper plate 24 is coaxially connected to the motor shaft 12 and rotates or does not rotate according to whether it contacts the lower plate 14. Therefore, when electricity is supplied to the electromagnet 11, the upper plate 24 and the lower plate 14 contact each other, and the rotational force of the motor shaft 12 and the rotational force of the lower plate 14 are transmitted to the upper plate 24.

[0074] However, when electricity is not supplied to the electromagnet 11 or the electricity is blocked, the upper plate 24 and the lower plate 14 release the contact state therebetween, and the rotational force of the motor shaft 12 and the rotational force of the lower plate 14 are not transmitted to the upper plate 24. Therefore, the driving force is not transmitted from the driving unit to the transmission unit.

[0075] The transmission unit includes a driving gear 21, an intermediate gear 22, and a lead screw 20. The driving gear 21 is coaxially connected to the clutches 14 and 24. The intermediate gear 22 meshes with the driving gear 21 and rotates. The lead screw 20 meshes with the intermediate gear 22 and rotates. In addition, the transmission unit further includes a mounting bracket 6. The mounting bracket 6 engages with the lead screw 20 inserted therein and is mounted to the vehicle body 1.

[0076] The drive gear 21 can be coaxially engaged with the upper plate 24 of the clutches 14 and 24 to rotate synchronously with the upper plate 24. In addition, the intermediate gear 22 can be meshed with and rotate with the drive gear 21, and the lead screw 20 can be meshed with and rotate with the intermediate gear 22.

[0077] Therefore, when the upper plate 24 and the lower plate 14 of the clutches 14 and 24 are in contact with each other, the driving force of the drive motor 10 can be transmitted to the lead screw 20 through the upper plate 24 and the drive gear 21 via the intermediate gear 22.

[0078] The lead screw 20 is inserted into and engaged with the mounting brackets 6, and the outer surface of the lead screw 20 is threadedly engaged with the inner surface of the mounting brackets 6. Therefore, when the lead screw 20 rotates, the lead screw 20 can move in the front and rear directions relative to the mounting brackets 6 and 9. Since the mounting brackets 6 are engaged with the vehicle body 1, the drive unit, the transmission unit, the belt unit, and the rail unit can be popped out or released from the popped-out state in a direction perpendicular to the longitudinal direction of the vehicle body 1 by the movement of the lead screw 20.

[0079] Meanwhile, the guide rods 5 and 7, which are connected to the lower portions on both sides of the rail unit and extend along a direction parallel to the lead screw 20, can be inserted into the mounting brackets 6 and 9. One end portion of the guide rods 5 and 7 can be engaged with the lower surface of the rail unit, and as the lead screw 20 moves, the guide rods 5 and 7 can move together while supporting the rail unit.

[0080] The belt unit includes a plurality of pulleys 16, 17, 35, and 39, a belt 18, and a belt carrier 19. The plurality of pulleys 16, 17, 35, and 39 are provided on the rail unit, the belt 18 is connected between the pulleys 16, 17, 35, and 39, and the belt carrier 19 is disposed on the rail 30 on the drive unit side of the rail unit.

[0081] The driving force of the drive unit causes the pulleys 16, 17, 35, and 39 to rotate, and the rotational force of the pulleys 16, 17, 35, and 39 causes the belt 18 to linearly move in the longitudinal direction of the rail unit. The rail unit is arranged to continuously slide and move through the meshing of the pinions 31 and 37 with the racks 33 and 38.

[0082] The belt unit may include a first pulley 16 and a second pulley 17. The first pulley 16 is coaxially engaged with the motor shaft 12, configured to rotate synchronously with the rotation of the motor shaft 12, and the first pulley 16 is connected to rotate at the lower portion of the first rail 30. The second pulley 17 is connected to rotate on the opposite side of the lower portion of the first rail 30 spaced apart from the first pulley 16. The first pulley 16 and the second pulley 17 can be connected to each other by the belt 18, and the belt 18 can linearly move through the rotation of the first pulley 16 and the second pulley 17.

[0083] The rail unit engages with the inner surface of the vehicle door 2 and slides and moves by the operation of the belt unit to slide the vehicle door 2.

[0084] The rail unit includes a first rail 30, a second rail 32, and a third rail 34. The first rail 30 is connected to the drive unit. The second rail 32 is connected to the first rail 30 and slides and moves along the first rail 30. The third rail 34 is connected to the second rail 32 and slides and moves along the second rail 32.

[0085] Figure 11 FIG. is a schematic view showing the pop-up and sliding operation states of a vehicle door opening / closing device according to an exemplary embodiment of the present application using a drive unit and a transmission unit. Figure 12 FIG. is a schematic view showing the sliding operation state of a vehicle door opening / closing device according to an exemplary embodiment of the present application using a drive unit and a transmission unit. Figure 13 FIG. is a schematic view showing the power transmission state of a vehicle door opening / closing device according to an exemplary embodiment of the present application using a clutch of a drive unit. Figure 14 FIG. is a schematic view showing the power transmission release state of a vehicle door opening / closing device according to an exemplary embodiment of the present application using a clutch of a drive unit.

[0086] Referring to Figure 11 and Figure 13 When a door opening signal for the vehicle door 2 is received, power is supplied to the electromagnet 11, and the upper plate 24 and the lower plate 14 of the clutches 14 and 24 come into contact with each other. Since the upper plate 24 of the clutches 14 and 24 meshes and engages with the lower plate 14, when the lower plate 14 rotates, the upper plate 24 rotates together.

[0087] When the drive motor 10 generates a driving force and the motor shaft 12 rotates, the lower plate 14 of the clutches 14 and 24 coaxially connected to the motor shaft 12 rotates, and the upper plate 24 of the clutches 14 and 24 engaged with the lower plate 14 rotates. The rotation of the upper plate 24 of the clutches 14 and 24 causes the drive gear 21 to rotate. The drive gear 21 causes the intermediate gear 22 to rotate. The intermediate gear 22 causes the lead screw 20 to rotate. The lead screw 20 linearly moves while rotating in the mounting bracket 6, and together with the guide rods 5 and 7, pops out the vehicle door opening / closing device 100 to the outside of the vehicle body 1.

[0088] At the same time, the first pulley 16 coaxially connected to the motor shaft 12 rotates, and the first pulley 16 rotates together with the second pulley 17 to linearly move the belt 18. Through the meshing of the pinions 31 and 37 with the racks 33 and 38, the movement of the belt 18 causes the second rail 32 and the third rail 34 disposed above the first rail 30 to slide and move.

[0089] Reference Figure 12 and Figure 14 When the pop-out movement of the vehicle door 2 is fully completed, the power supply to the electromagnet 11 is blocked. The upper plate 24 and the lower plate 14 of the clutches 14 and 24 are disengaged, and a gap g is generated. In the current situation, although the drive motor 10 continues to operate, the driving force of the drive motor 10 does not cause the upper plate 24 to rotate. Therefore, the driving force of the drive motor 10 is not transmitted to the transmission unit connected to the upper plate 24, and thus, the pop-out of the vehicle door 2 stops.

[0090] The driving force of the drive motor 10 causes the first pulley 16 coaxially connected to the motor shaft 12 to rotate, rotates together with the second pulley 17 to linearly move the belt 18, and the driving force of the drive motor 10 continues until the second rail 32 and the third rail 34 (the second rail 32 and the third rail 34 are connected to the first rail 30 through pinions 31 and 37 and racks 33 and 38 to continuously slide and move) slide and move sufficiently.

[0091] Figure 15 is a schematic diagram showing the pop-out and sliding operation states of a vehicle door opening and closing device according to an exemplary embodiment of the present application for power transmission through a clutch. Figure 16 is a schematic diagram showing the sliding operation state of a vehicle door opening and closing device according to an exemplary embodiment of the present application for power transmission release through a clutch.

[0092] As Figure 15 shown, the driving force of the drive motor 10 is transmitted to the transmission unit through the clutches 14 and 24, and the transmission unit moves the lead screw 20 to the outside of the vehicle body 1 to pop out the vehicle door 2. At the same time, the driving force of the drive motor 10 causes the first pulley 16 to rotate to linearly move the belt 18 in the longitudinal direction of the track unit.

[0093] The belt carrier 19 can be connected to the belt 18 and linearly move through the movement of the belt 18, and the belt carrier 19 can be disposed on the belt 18. The first pinion 31 and the engagement pin 15 connected and fixed to the lower part of the second rail 32 are disposed on the belt carrier 19. The movement of the belt carrier 19 causes the second rail 32 to slide and move, and the movement of the second rail 32 causes the third rail 34 to slide and move.

[0094] As Figure 16 shown, when the pop-out movement of the vehicle door 2 is fully completed, the clutches 14 and 24 do not transmit the driving force of the drive motor 10 to the transmission unit, and the pop-out of the vehicle door 2 stops.

[0095] The driving force of the drive motor 10 rotates the first pulley 16, causing the belt 18 to linearly move in the longitudinal direction of the track unit, and the belt carrier 19 connected to the belt 18 continuously moves to the point where the second pulley 17 is located. Accordingly, the second track 32 and the third track 34 continuously slide until the opening amount of the vehicle door 2 reaches its maximum value.

[0096] Figure 17 is a front schematic view showing a cross-section of a belt unit and a track unit of a vehicle door opening and closing device according to an exemplary embodiment of the present application. Figure 18 is a perspective view showing a cross-section of a belt unit and a track unit of a vehicle door opening and closing device according to an exemplary embodiment of the present application. Figure 19 is an enlarged view of a belt unit and a track unit of a vehicle door opening and closing device according to an exemplary embodiment of the present application. Figure 20 is a schematic view showing a state in which a second track of a track unit of a vehicle door opening and closing device slides and moves according to an exemplary embodiment of the present application. Figure 21 is a schematic view showing a state in which a third track of a track unit of a vehicle door opening and closing device slides and moves according to an exemplary embodiment of the present application.

[0097] Referring to Figures 17 to 21 , the belt carrier 19 is disposed on the belt 18 connecting the first pulley 16 and the second pulley 17, and the first pinion 31 is disposed to pass through the first track 30 and is formed in the middle of the belt carrier 19. A first rack 33 extending in the longitudinal direction of the first track 30 is formed on the lower surface of the first track 30, and the first pinion 31 of the belt carrier 19 meshes with the first rack 33 and moves.

[0098] The belt carrier 19 is disposed to pass through the first track 30 and extend such that an engagement pin 15 that engages with a lower portion of the second track 32 is formed. Accordingly, as the first pinion 31 meshes with the first rack 33 and the belt carrier 19 moves in the longitudinal direction of the first track 30, the second track 32 fixed to the engagement pin 15 slides and moves.

[0099] The pulleys 35 and 39 include a third pulley 35 and a fourth pulley 39. The third pulley 35 is disposed at a lower portion of the second track 32 and is connected to the first pinion 31. The fourth pulley 39 is connected to rotate on the opposite side of the lower portion of the second track 32 that is spaced apart from the third pulley 35. The third pulley 35 and the fourth pulley 39 may be connected to a belt 29 that linearly moves by the rotation of the third pulley 35 and the fourth pulley 39.

[0100] As the carrier 19 moves, the second track 32 moves, and the third pulley 35 and the fourth pulley 39 provided on the second track 32 rotate. Accordingly, the belt 29 connected to the third pulley 35 and the fourth pulley 39 moves linearly.

[0101] Meanwhile, the second pinion 37 passing through the third track 34 is coaxially provided on the fourth pulley 39 and meshes with a second rack 38 formed in the third track 34. Accordingly, when the fourth pulley 39 rotates, the second pinion 37 meshes with the second rack 38 of the third track 34, and the third track 34 slides and moves.

[0102] The sliding motions of the second track 32 and the third track 34 can be performed smoothly by a plurality of roller bearings 40. That is, by the rolling of the roller bearings 40 provided on the second track 32, the second track 32 can slide and move in the longitudinal direction of the first track 30, and by the rolling of the roller bearings 40 provided on the third track 34, the third track 34 can slide and move in the longitudinal direction of the second track 32.

[0103] Meanwhile, the opening process by the pop-up and sliding of the door 2 when the door 2 is closed has been described above. On the other hand, the closing process by sliding the door 2 and releasing the pop-up of the door 2 when the door 2 is open can be performed in the reverse order of that described above.

[0104] As described above, according to the exemplary embodiment of the present application, the center track / door arm structure is removed from the reverse sliding door structure of a vehicle without a B-pillar, and thus, the door opening width can be maximized.

[0105] In addition, an upper track / door arm structure capable of realizing the sliding and pop-up operations of the door is introduced, and thus, the door rotation radius is minimized, so that the amount of protrusion of the door toward the outside of the vehicle body when the door is open is minimized.

[0106] In addition, a track unit having a three-stage telescopic structure is applied, and thus, openness and robustness can be ensured simultaneously.

[0107] In the exemplary embodiment of the present application, a vehicle can be based on the concept and include various transportation means. In some cases, a vehicle can be interpreted based on the concept as including not only various land transportation means traveling on roads, such as cars, motorcycles, trucks, and buses, but also various transportation means such as airplanes, drones, and ships.

[0108] For the convenience of explanation and to accurately define the appended claims, the terms "up", "down", "inside", "outside", "above", "below", "upward", "downward", "front", "rear", "back", "inner side", "outer side", "inward", "outward", "interior", "exterior", "internal", "external", "forward", and "backward" are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings. It will be further understood that the term "connected" or its derivatives refer to both direct and indirect connections.

[0109] The term "and / or" may include combinations of multiple related listed items or any one of multiple related listed items. For example, "A and / or B" includes three cases: "A", "B", and "A and B".

[0110] In the exemplary embodiments of the present application, "at least one of A and B" may refer to "at least one of A or B" or "at least one of a combination of at least one of A and B". In addition, "one or more of A and B" may refer to "one or more of A or B" or "one or more of a combination of one or more of A and B".

[0111] In this specification, unless otherwise specified, the singular form also includes the plural form, unless the context clearly indicates otherwise.

[0112] In the exemplary embodiments of the present application, it should be understood that terms such as "comprising" or "having" are intended to indicate the presence of the features, numbers, steps, operations, elements, components, or combinations thereof described in the specification, and do not exclude the possibility of adding or existing one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0113] According to the exemplary embodiments of the present application, components may be combined with each other to be executed as a whole, or some components may be omitted.

[0114] The foregoing description of the specific exemplary embodiments of the present application is for purposes of illustration and description. The foregoing is not intended to be exhaustive or to limit the present application to the precise forms disclosed, and obviously, many modifications and changes are possible in light of the above teachings. The exemplary embodiments selected and described are for the purpose of explaining certain principles of the present application and its practical applications, so that other persons skilled in the art can make and use various exemplary embodiments of the present application, as well as their alternatives and modifications. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vehicle door opening and closing device configured to open or close a vehicle door opening portion by sliding and popping out a door formed in a vehicle body, the vehicle door opening and closing device comprising: A drive unit configured to provide a driving force for sliding and popping out operations of the door; A transmission unit configured to selectively engage with the drive unit to receive the driving force from the drive unit and cause the door to pop out; A belt transmission unit configured to selectively engage with the drive unit to receive the driving force from the drive unit and cause the door to slide; And A track unit engaged with the belt transmission unit and connected to the door, the track unit being configured to provide a path for the door to slide through the operation of the belt transmission unit.

2. The door opening and closing device according to claim 1, wherein, The drive unit includes: A drive motor; A clutch connected to the drive motor and configured to rotate by the rotational force of the drive motor; and An electromagnet to which power is supplied or blocked to transmit or block the rotational force of the clutch to the transmission unit by selectively engaging the clutch.

3. The door opening and closing device according to claim 2, wherein, The clutch includes: A lower plate coaxially engaged with the motor shaft of the drive motor and configured to rotate synchronously with the rotation of the motor shaft; and An upper plate coaxially connected to the motor shaft and configured to rotate or not rotate according to whether the electromagnet contacts the lower plate.

4. The vehicle door opening and closing device according to claim 3, wherein In response to power being supplied to the electromagnet, the upper plate and the lower plate contact each other, In response to power not being supplied to the electromagnet, the upper plate and the lower plate release their contact with each other.

5. The door opening and closing device according to claim 4, wherein, The transmission unit includes: A drive gear coaxially connected to the upper plate, engaged with a lower portion of the track unit, and configured to rotate synchronously with the upper plate; An intermediate gear meshing with the drive gear and configured to rotate in a lower portion of the track unit; A lead screw meshing with the intermediate gear and configured to rotate in a lower portion of the track unit; and A first mounting bracket mounted to the vehicle body, engaged with the lead screw inserted therein, and configured to support the drive unit to move outward of the vehicle body in response to the rotation of the lead screw.

6. The vehicle door opening and closing device according to claim 5, further comprising: A first guide rod engaged in the first mounting bracket and connected to a lower portion of a first side of the track unit, the first guide rod being configured to extend in a direction parallel to the lead screw and guide the movement of the lead screw.

7. The vehicle door opening and closing device according to claim 1, further comprising: A second mounting bracket mounted to the vehicle body; And A second guide rod connected to a lower portion of a second side of the track unit and slidably engaged with the second mounting bracket.

8. The vehicle door opening and closing device according to claim 5, wherein The track unit includes a plurality of tracks that are telescopically engageable with each other, One of the plurality of tracks is connected to the drive unit.

9. The door opening and closing device according to claim 8, wherein, The plurality of tracks includes: A first track connected to the drive unit; A second track connected to the first track and configured to slide and move along the first track; and A third track connected to the second track and configured to slide and move along the second track.

10. The door opening and closing device according to claim 9, wherein, the second rail is configured to slide and move in the longitudinal direction of the first rail by rolling of a roller bearing provided on the second rail; the third rail is configured to slide and move in the longitudinal direction of the second rail by rolling of a roller bearing provided on the third rail.

11. The door opening and closing device according to claim 9, wherein, The belt unit includes: a pulley provided at a lower portion of the first rail and engaged with the driving unit to receive driving force from the driving unit and rotate; a belt engaged with the pulley and configured to linearly move by rotation of the pulley; and a belt carrier connected to the belt and configured to linearly move by movement of the belt.

12. The door opening and closing device according to claim 11, wherein, The pulley includes: a first pulley coaxially engaged with the motor shaft, configured to rotate in synchronization with rotation of the motor shaft, and the first pulley is connected to rotate at a lower portion of the first rail; and a second pulley connected to rotate on a side opposite to the first pulley and spaced apart from the first pulley at a lower portion of the first rail.

13. The door opening and closing device according to claim 12, wherein, the belt includes a first belt, the first pulley and the second pulley are connected to the first belt, and the first belt is configured to linearly move by rotation of the first pulley and the second pulley.

14. The door opening and closing device according to claim 12, wherein, The belt carrier includes: a first pinion configured to engage with and move along a first rack extending in the longitudinal direction of the first rail and formed on a lower surface of the first rail.

15. The door opening and closing device according to claim 14, wherein, The belt carrier is connected to a lower portion of the second rail by a joint pin.

16. The door opening and closing device according to claim 15, wherein, The pulley further includes: a third pulley provided at a lower portion of the second rail and connected to the first pinion; and a fourth pulley connected to rotate on a side opposite to the third pulley and spaced apart from the third pulley at a lower portion of the second rail.

17. The door opening and closing device according to claim 16, wherein, the belt includes a second belt, the third pulley and the fourth pulley are connected to the second belt, and the second belt is configured to linearly move by rotation of the third pulley and the fourth pulley.

18. The door opening and closing device according to claim 17, wherein, The fourth pulley includes: a second pinion engaged with a second rack extending in the longitudinal direction of the third rail and configured to rotate in response to rotation of the fourth pulley, and the second pinion rotates to move the third rail in the longitudinal direction.

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