Door hinge device for vehicles

Abstract

A vehicle door hinge device is disclosed. A vehicle door hinge device according to one embodiment of the present invention enables simultaneous opening and closing operation of both doors and independent opening and closing operation in a vehicle without a B-pillar, in the process where the hinge portion of the door moves diagonally outward along a rail along the vehicle body, a hinge bar connected to the carrier of a reduction unit through a hinge shaft, and a rack and pinion connected to the rotation axis of a sun gear, thereby setting the amount of rotation of the door and securing the rotation trajectory of the door.

Description

Technology Field

[0001] The present invention relates to a vehicle door hinge device, and more specifically, to a vehicle door hinge device that enables independent opening and closing operation by pushing the hinge portion of the door outward from the vehicle body in a vehicle without a B-pillar. Background Technology

[0002] Generally, vehicle doors serve the important function of separating the interior and exterior of a vehicle, blocking external noise, rain, dust, and wind, and absorbing impact along with the side structure in the event of a side collision to safely protect the occupants.

[0003] There are various types of vehicle doors, including special-purpose doors, but hinged swing doors are most commonly used in passenger vehicles.

[0004] Typically, 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 hinge bracket, and has the advantages of being easy to open and close, having a simple structure, and being easy to maintain and repair.

[0005] Meanwhile, some vehicles feature opposing swing doors that provide a great sense of openness when opened and are advantageous for passengers getting on and off.

[0006] These opposing swing doors are classified into types without a B-pillar and types with a B-pillar.

[0007] FIG. 1 is a side view illustrating a vehicle equipped with opposing swing doors according to an example of the prior art, and FIG. 2 is a cross-sectional view illustrating the portion where the front door and the rear door meet in the vehicle of FIG. 1.

[0008] First, referring to FIGS. 1 and 2, an example of a facing swing door applied to a vehicle (100) without a B-pillar is shown. A hinge portion of the front door (110) is installed at the front end of the front door (110), and a hinge portion of the rear door (120) is installed at the rear end of the rear door (120).

[0009] For such opposing swing doors, a latch (LC) is installed on one side of the front door (110) or rear door (120) to maintain a locked state.

[0010] In addition, a sealing (S) for airtightness is installed between the rear end of the front door (110) and the front end of the rear door (120).

[0011] As described above, the opposing swing door of the vehicle (100) without a B-pillar has a good sense of openness when passengers get in and out or during leisure activities, but it has a disadvantage that the order of opening and closing is predetermined, such as having to open the front door (110) first or close it later, due to interference problems where the rotational trajectories of the front door (110) and the rear door (120) overlap when the front door (110) and the rear door (120) are opened and closed.

[0012] As such, the opening and closing sequence of the front door (110) and the rear door (120) is predetermined, so there is a problem that the rear door (120) cannot be opened or closed independently.

[0013] FIG. 3 is a side view illustrating a vehicle equipped with opposing swing doors according to another example of the prior art, and FIG. 4 is a cross-sectional view illustrating the portion where the front door and the rear door meet in the vehicle of FIG. 3.

[0014] Referring to FIGS. 3 and 4, an example of a facing swing door applied to a vehicle (200) having a B-pillar (230) is shown. In this case, the front door (210) has a hinge portion installed at the front end of the front door (210), and the rear door (220) has a hinge portion installed at the rear end of the rear door (220).

[0015] These opposing swing doors are equipped with a latch (LC) to maintain a locked state between each side of the front door (210) and the rear door (220) and the B-pillar (230).

[0016] In addition, a sealing (S) for airtightness is installed between the rear end of the front door (210) corresponding to the B-pillar (230) and the front end of the rear door (220) and the B-pillar (230).

[0017] As such, the opposing swing door of the vehicle (100) with the B-pillar is configured so that the front door (210) and the rear door (220) rotate relative to the B-pillar (230), allowing each to open and close independently, which has the advantage of a free operating sequence, but there is a problem that the sense of openness is reduced during passenger boarding / alighting or leisure activities due to the application of the B-pillar (230).

[0018] As such, the opposing swing door has a difference in the sense of openness depending on the presence or absence of the B-pillar, and there is a difference in the opening and closing operation of the front door and the rear door.

[0019] Meanwhile, as described above, in order to resolve the problem of the operating sequence of the front door (110) and the rear door (120) while maintaining the openness of the vehicle (100) without a B-pillar, there are examples in which a gooseneck type hinge device is applied as a door hinge device for a facing swing door, but such a gooseneck type hinge device requires a lot of extra space in the width direction of the vehicle body due to the characteristics of its shape, making it difficult to configure the vehicle body layout.

[0020] Accordingly, in order to apply a facing swing door to a vehicle without a B-pillar, a door hinge device is required to implement a new opening and closing structure. Prior art literature

[0021] The matters described in the background technology section of the Korean Intellectual Property Office Publication No. 2019-0028966 (Publication Date: March 20, 2019) are intended to enhance understanding of the background of the invention and may include matters that are not prior art already known to a person skilled in the art to which this technology belongs. The problem to be solved

[0022] An embodiment of the present invention aims to provide a vehicle door hinge device that enables each door to be opened and closed independently in a state where the rotational trajectory of the door is secured by a hinge bar connected to the carrier of a reduction unit via a hinge axis and a rack and pinion connected to the rotation axis of a sun gear during the process in which the hinge portion of the door moves diagonally outward along a rail in a vehicle without a B-pillar. means of solving the problem

[0023] In one or more embodiments of the present invention, a vehicle door hinge device comprises: a rail bracket installed on one side of a vehicle body corresponding to one end of a door, wherein an upper rail and a lower rail are formed facing outward from the vehicle body; a roller block that rotatably supports an upper roller and a lower roller, which are respectively rollingly supported on the upper rail and the lower rail on the rail bracket; a reduction unit fixed to the roller block through the case, comprising a sun gear, a plurality of planetary gears, a ring gear, and a carrier that rotatably supports the plurality of planetary gears inside the case; a hinge shaft connected to the rotational center of the carrier, wherein the upper end is connected to one end of the door through an upper hinge bar outside the case; a rotational shaft connected to the rotational center of the sun gear, wherein the lower end is connected to one end of the door through a lower hinge bar outside the case; and a rack fixed along the longitudinal direction to the lower part of the rail bracket. A vehicle door hinge device may be provided, comprising a pinion fixedly connected to one side of the lower part of the rotation shaft outside the case and engaged with the rack.

[0024] The above door may have one end formed by the front end of the front door or the rear end of the rear door.

[0025] The above rail bracket can be installed diagonally toward the front outer side or the rear outer side of the vehicle body.

[0026] The roller block above can have the upper roller rollingly supported on the upper rail and the lower roller rollingly supported on the lower rail.

[0027] The upper and lower rollers mentioned above may be made of circular roller bearings.

[0028] Each rolling support surface of the upper and lower rollers and the upper and lower rails supported thereon may be formed as a semicircular contact surface.

[0029] The above reduction unit may include: a case fixed to the outer surface of the roller block; a sun gear disposed at the center of the case, with the lower end of the rotation axis fixedly connected to the rotation center of the pinion from the outside of the case; three planetary gears externally meshing at radially equal intervals on the outer circumference of the sun gear; a ring gear formed as a circular internal gear inside the case and internally meshing with the three planetary gears; and a carrier that rotatably supports the three planetary gears to rotate and revolve, with the hinge axis fixedly connected to the rotation center.

[0030] The above reduction unit may have a reduction ratio set to complete the swing operation of the door in proportion to the length of the rail bracket.

[0031] The hinge shaft is fixedly connected to the rotation center of the carrier inside the case, and its upper end can be fixed to the upper hinge bar by penetrating the case of the reduction unit.

[0032] The upper hinge bar is formed in a 'U' shape, so that one end is fixed to the upper end of the hinge shaft and the other end is fixedly connected to one end of the door.

[0033] In addition, the lower hinge bar is formed in a 'U' shape, so that one end is rotatably connected to the lower end of the rotation axis and the other end is fixedly connected to one end of the door.

[0034] The hinge axis and the rotation axis can each be rotatably supported through bearings inside the case. Effects of the invention

[0035] An embodiment of the present invention is applied to a vehicle without a B-pillar, and in the process where the hinge portion of the door moves diagonally outward along the rail, a hinge bar connected to the carrier of the reduction unit through a hinge shaft and a rack and pinion connected to the rotation axis of the sun gear set the amount of rotation of the door, thereby securing the rotational trajectory of the door and enabling each door to be opened and closed simultaneously or opened and closed independently.

[0036] In other words, through a reduction unit of the rack and pinion and planetary gear set type, the amount of rotation of the doors is regulated according to the movement of the doors diagonally outward from the vehicle body, thereby preventing interference between the doors.

[0037] Accordingly, the embodiment of the present invention maintains the advantage of a good sense of openness during passenger entry / exit or leisure activities in a facing swing door of a vehicle without a B-pillar, and has the effect of not affecting the door opening / closing sequence even during the opening and closing operation of each door.

[0038] In addition, the embodiment of the present invention has the advantage of being slimmer than a conventional gooseneck type hinge device, and also provides room in the vehicle body layout configuration because it does not require extra space according to the operating radius. Brief explanation of the drawing

[0039] FIG. 1 is a side view illustrating a vehicle equipped with a facing swing door according to an example of the prior art. FIG. 2 is a cross-sectional view illustrating the part where the front door and the rear door meet in the vehicle of FIG. 1. FIG. 3 is a side view illustrating a vehicle equipped with opposing swing doors according to another example of the prior art. FIG. 4 is a cross-sectional view illustrating the part where the front door and the rear door meet in the vehicle of FIG. 3. FIG. 5 is an inner perspective view of a vehicle door to which a vehicle door hinge device according to an embodiment of the present invention is applied. FIG. 6 is a perspective view of a vehicle door hinge device according to an embodiment of the present invention. FIG. 7 is a side cross-sectional view of a deceleration unit applied to a vehicle door hinge device according to an embodiment of the present invention. FIG. 8 is a plan cross-sectional view of a deceleration unit applied to a vehicle door hinge device according to an embodiment of the present invention. FIGS. 9 and 10 are plan cross-sectional views illustrating the state before and after operation of a vehicle door hinge device according to an embodiment of the present invention. Specific details for implementing the invention

[0040] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0041] However, the size and thickness of each component shown in the drawings are depicted arbitrarily for the convenience of explanation, and thus the present invention is not necessarily limited to what is shown in the drawings; thicknesses have been enlarged or reduced to clearly represent various parts and regions. Additionally, parts unrelated to the explanation have been omitted to clearly explain the embodiments of the present invention.

[0042] In describing the embodiments of the present invention, for convenience of explanation, the upper left direction of FIG. 5 is defined as the front and the lower right direction as the rear. Furthermore, the vehicle door hinge device according to the embodiments of the present invention may be installed on both front doors and both rear doors located at the front and rear of the driver's seat and passenger seat of a vehicle, respectively; in the embodiments of the present invention, it is described as an example applied to the front doors and rear doors located at the front and rear of the passenger seat.

[0043] FIG. 5 is an inner perspective view of a vehicle door to which a vehicle door hinge device according to an embodiment of the present invention is applied, FIG. 6 is a perspective view of a vehicle door hinge device according to an embodiment of the present invention, FIG. 7 is a side cross-sectional view of a deceleration unit applied to a vehicle door hinge device according to an embodiment of the present invention, and FIG. 8 is a plan cross-sectional view of a deceleration unit applied to a vehicle door hinge device according to an embodiment of the present invention.

[0044] A vehicle door hinge device (1) according to an embodiment of the present invention can be applied between both front doors (FDR) and the vehicle body (BD) of a passenger vehicle without a B-pillar, and between both rear doors (RDR) and the vehicle body (BD).

[0045] That is, when the doors are opened or closed, the front door (FDR) or the rear door (RDR) moves to the outside of the vehicle body (BD) in each diagonal direction in front of or behind the vehicle body (BD), thereby securing the rotational trajectory of each door, allowing both doors to be opened and closed simultaneously or one door to be opened and closed independently.

[0046] Hereinafter, the term "door" may refer to both the front door (FDR) and the rear door (RDR) simultaneously, and is not distinguished in the detailed description of the door hinge device (1).

[0047] Referring to FIGS. 5 to 8, a vehicle door hinge device (1) according to an embodiment of the present invention may include a rail bracket (10), a roller block (20), a reduction unit (30), a hinge shaft (40), a rotation shaft (45), a rack (51), and a pinion (53).

[0048] The above rail bracket (10) is installed on one side of the vehicle body (BD) corresponding to one end of the door, and an upper rail (11) and a lower rail (13) are formed respectively on the upper and lower sides facing the outside of the vehicle body (BD).

[0049] Here, the end portion of the door may refer to the front portion of the front door (FDR) or the rear portion of the rear door (RDR).

[0050] These rail brackets (10) can be installed diagonally toward the front outer side of the vehicle body (BD) or the rear outer side of the vehicle body (BD).

[0051] The roller block (20) is configured in the shape of a block that rotatably supports an upper roller (21) and a lower roller (23), which are respectively supported on an upper rail (11) and a lower rail (13) on a rail bracket (10).

[0052] Here, the upper roller (21) is in contact with the upper rail (11) and is supported by rolling, and the lower roller (23) is in contact with the lower rail (13) and is supported by rolling.

[0053] Additionally, the upper and lower rollers (21)(23) may be made of circular roller bearings.

[0054] Additionally, each rolling support surface of the upper and lower rollers (21)(23) and the upper and lower rails (11)(13) that are rollingly supported thereon may be formed as a semicircular contact surface (CF).

[0055] The above reduction unit (30) is composed of a sun gear (33), three planetary gears (35), a ring gear (37), and a carrier (39) that rotates and supports the three planetary gears (35) inside the case (31), and is fixed to the roller block (20) through the case (31).

[0056] That is, referring to FIGS. 7 and FIGS. 8, the reduction unit (30) has a square case (31) fixed to the outer surface of the roller block (20), and inside the case (31), a sun gear (33), three planetary gears (35), a ring gear (39), and a carrier (39) are configured as rotating elements.

[0057] The sun gear (33) is positioned at the inner center of the case (31), and a rotation axis (45) is fixedly connected downward to the rotation center of the sun gear (33).

[0058] In addition, the three planetary gears (35) are externally engaged at radially equal intervals on the outer circumference of the sun gear (33).

[0059] Here, the three planetary gears (35) are connected to the carrier (39) through the central axis (35a) and are rotatably supported to enable rotation and revolution.

[0060] The above ring gear (37) is formed as a circular internal gear along the inner surface inside the case (31), and the ring gear (37) is internally meshed with three planetary gears (35).

[0061] In addition, the carrier (39) is rotatably supported by three planetary gears (35) each connected through a central axis (35a) to enable rotation and revolution, and the hinge axis (40) is fixedly connected upward to the center of rotation.

[0062] That is, the above reduction unit (30) is configured as a single pinion planetary gear set inside the case (31), and the rotation shaft (45) is fixedly connected downward to the rotation center of the sun gear (33) so as to rotate integrally with the sun gear (33), and the hinge shaft (40) is fixedly connected upward to the rotation center of the carrier (39) so as to rotate integrally with the carrier (39).

[0063] Here, the reduction unit (30) can be set such that the reduction ratio of the planetary gear set is proportional to the lengths of the upper and lower rails (11)(13) of the rail bracket (10) and can complete the swing operation of the door.

[0064] Additionally, the hinge shaft (40) is fixedly connected to the rotation center of the carrier (39) inside the case (31), and its upper end penetrates the case (31) and is connected to an upper hinge bar (41) connected to one end of the door from the top. That is, the upper hinge bar (41) swings the door according to the rotation of the hinge shaft (40).

[0065] One side of this hinge shaft (40) is rotatably supported through a bearing (BR) inside the case (31).

[0066] In addition, the rotation shaft (45) is fixedly connected to the rotation center of the sun gear (33) inside the case (31), and its lower end penetrates the case and is connected to the lower hinge bar (43) connected to one end of the door at the bottom through a bearing (BR).

[0067] At this time, the rotation axis (45) is independent of the rotation of the lower hinge bar (43), and one side is rotatably supported through a bearing (BR) inside the case (31).

[0068] Here, the hinge shaft (40) and the rotation shaft (45) are connected to a reduction unit (30) and rotate at a mutually set reduction ratio, and the reduction ratio can be set to complete the swing operation of the door in proportion to the length of the rail bracket (10).

[0069] In addition, the upper hinge bar (41) is formed in a 'U' shape, with one end fixedly connected to the upper end of the hinge shaft (40) and the other end fixedly connected to one end of the door.

[0070] In addition, the lower hinge bar (43) is formed in the same 'U' shape as the upper hinge bar (41), one end is connected to the lower end of the rotation shaft (45) via a bearing (BR), and the other end is fixedly connected to one end of the door.

[0071] Here, if the door is a front door (FDR), the other end of the upper and lower hinge bar (41)(43) can be fixedly connected to one side of the front end of the front door (FDR), and if the door is a rear door (RDR), the other end of the upper and lower hinge bar (41)(43) can be fixedly connected to one side of the rear end of the rear door (RDR).

[0072] Additionally, one end of the upper hinge bar (41) is fixedly connected to the hinge shaft (40), but one end of the lower hinge bar (43) is connected to the lower end of the rotation shaft (45) through a bearing (BR) and does not receive rotational force from the hinge shaft (40). Accordingly, the other end of the lower hinge bar (43) is connected to one end of the door and is structured to simply rotate together with the door.

[0073] And the rack (51) is fixedly installed along the longitudinal direction on the lower part of the rail bracket (10) in the shape of a rack bar.

[0074] In addition, the pinion (53) is fixed to one side of the lower portion of the rotation shaft (45) and meshes with the rack (51). That is, the pinion (53) can be spline-fastened to the rotation shaft (45) and rotates integrally with the rotation shaft (45) to move along the rack (51) and functions to move the hinge portion of the door diagonally outward from the vehicle body (BD).

[0075] Hereinafter, the specific operation of a vehicle door hinge device according to an embodiment of the present invention will be explained with reference to FIGS. 9 and FIGS. 10.

[0076] FIGS. 9 and 10 are plan cross-sectional views illustrating the state before and after operation of a vehicle door hinge device according to an embodiment of the present invention.

[0077] First, referring to Fig. 9, the door (DR) is in a closed state.

[0078] At this time, the hinge shaft (40) is moved diagonally inwardly to the vehicle body (3) together with the deceleration unit (30), and one end of the door (DR) is in a position where the door (DR) maintains a closed state.

[0079] Referring to FIG. 10, as the door (DR) opens, the hinge shaft (40) connected to the door (DR) through the upper hinge bar (41) rotates together with the door (DR) in the direction in which the door (DR) opens.

[0080] Then, as the carrier (39) fixedly connected to the hinge bar (40) rotates together, the three planetary gears (35) rotate and revolve along the outer circumference of the sun gear (33).

[0081] That is, the rotational force generated when the door (DR) opens is transmitted to the carrier (39) in the same direction through the hinge shaft (40), and the three planetary gears (35) rotate as they move along the inner circumference of the ring gear (37) fixed in the direction of rotation due to the rotation of the carrier (39).

[0082] At this time, the three planetary gears (35) revolve around the sun gear (33) and rotate the sun gear (33) at an increased speed by the rotational force, causing it to rotate in the same direction as the revolvement direction of each planetary gear (35).

[0083] Then, as the door (DR) swings open, the rotating shaft (45) fixedly connected to the sun gear (33) rotates the pinion (53) engaged with the rack (51), and accordingly, the roller block (20) moves diagonally outward along the upper and lower rails (11)(13) of the rail bracket (10) together with the reduction unit (30).

[0084] Accordingly, the door (DR) opens by moving the hinge part, which includes the hinge axis (40), outwardly diagonally to secure a rotational trajectory.

[0085] Accordingly, the vehicle door hinge device (1) according to an embodiment of the present invention is applied between one end of the door (DR) and the vehicle body (3) in a facing swing door of a vehicle without a B-pillar, so that both doors (DR) can be opened and closed simultaneously, and one door can also be opened and closed independently.

[0086] In addition, the vehicle door hinge device (1) according to an embodiment of the present invention can prevent interference between doors by regulating the amount of rotation of the door (DR) according to the amount of movement of the door (DR) diagonally outward from the vehicle body through a rack (51), a pinion (53), and a planetary gear set type reduction unit (30).

[0087] That is, taking the front door (FDR) as an example, when the front door (FDR) opens, the rotational speed of the rotational shaft (45) is increased compared to the rotational speed of the hinge shaft (40) and transmitted to the pinion (53).

[0088] At this time, the hinge shaft (40) moves along the upper and lower rails (11)(13) along the rack (51) to the outer front of the vehicle body by the rotation of the pinion (53), and the front door (FDR) can adjust the desired amount of rotation according to the position of the hinge shaft (40).

[0089] In addition, the vehicle door hinge device (1) according to the embodiment of the present invention can overcome the structural limitations of existing systems and has the advantage of having a simple structure.

[0090] Although one embodiment of the present invention has been described above, the present invention is not limited to such embodiment and includes all modifications within the scope recognized as equivalent that can be easily modified by a person skilled in the art to which the present invention belongs from the embodiment of the present invention. Explanation of the symbols

[0091] 1: Door hinge mechanism BD: Chassis FDR: Front Door RDR: Rear Door DR: Door 10: Rail bracket 11: Upper rail 13: Lower rail 20: Roller Block 21: Upper roller 23: Lower roller 30: Deceleration unit 31: Case 33: Sun Gear 35: Planetary gear 37: Ring gear 39: Carrier 40: Hinge axis 41: Upper hinge bar 43: Lower hinge bar 45: Rotation axis 51: Rack 53: Pinion BR: Bearing

Claims

Claim 1 A vehicle door hinge device comprising: a rail bracket installed on one side of a vehicle body corresponding to one end of a door, with a rail formed facing the outside of the vehicle body; a roller block that rotatably supports a roller that rolls on a rail on the rail bracket; a hinge shaft, the upper end of which is connected to one end of the door through an upper hinge bar; a rotation shaft, the lower end of which is connected to one end of the door through a lower hinge bar; a reduction unit fixed to the roller block through a case and connected to the hinge shaft and the rotation shaft respectively through a plurality of rotational elements configured inside, so that the hinge shaft and the rotation shaft rotate at a mutually set reduction ratio; a rack fixed to the rail bracket; and a pinion engaged with the rack. Claim 2 In claim 1, the door is a vehicle door hinge device in which one end is formed as the front end of a front door or the rear end of a rear door. Claim 3 A vehicle door hinge device according to claim 1, wherein the rail bracket is installed diagonally toward the front outer side or the rear outer side of the vehicle body, and an upper rail and a lower rail are respectively formed at the upper and lower ends along the longitudinal direction. Claim 4 In paragraph 3, the roller block is a vehicle door hinge device that rotatably supports an upper roller that is rollingly supported on the upper rail and a lower roller that is rollingly supported on the lower rail. Claim 5 In paragraph 4, the upper and lower rollers are circular roller bearings, forming a vehicle door hinge device. Claim 6 A vehicle door hinge device according to claim 4, wherein the upper and lower rollers and the rolling support surfaces of the upper and lower rails rollingly supported thereon each have semicircular contact surfaces. Claim 7 A vehicle door hinge device according to claim 1, wherein the reduction unit comprises a single pinion planetary gear set consisting of a sun gear connected to the rotation axis, a plurality of planetary gears, a ring gear, and a carrier connected to the hinge axis that rotatably supports the plurality of planetary gears, inside the case. Claim 8 A vehicle door hinge device according to claim 1, wherein the reduction unit comprises: a case fixed to the outer surface of the roller block; a sun gear disposed at the inner center of the case, with its rotation center fixedly connected to the rotation axis; three planetary gears externally meshing at radially equal intervals on the outer circumference of the sun gear; a ring gear formed as a circular internal gear inside the case and internally meshing with the three planetary gears; and a carrier that rotatably supports the three planetary gears so as to rotate and revolve, with its rotation center fixedly connected to the hinge axis. Claim 9 A vehicle door hinge device according to claim 1, wherein the reduction unit has a reduction ratio between the hinge axis and the rotation axis set to complete the swing operation of the door in proportion to the length of the rail bracket. Claim 10 A vehicle door hinge device according to claim 1, wherein the rack is fixed along the longitudinal direction to the lower part of the rail bracket and the pinion is fixedly connected to the rotation axis. Claim 11 A vehicle door hinge device according to claim 1, wherein the upper hinge bar is formed in a 'U' shape, one end is fixed to the upper end of the hinge shaft, and the other end is fixedly connected to one end of the door. Claim 12 A vehicle door hinge device according to claim 1, wherein the lower hinge bar is formed in a 'U' shape, one end of which is rotatably connected to the lower end of the rotation axis, and the other end of which is fixedly connected to one end of the door. Claim 13 A vehicle door hinge device according to claim 1, wherein the hinge shaft and the rotation shaft are each rotatably supported through bearings inside the case.

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