Vehicle side door structure

Abstract

To improve a rigidity of a link member connecting a side door to a vehicle body.SOLUTION: A link member 20 of a vehicle side door structure is provided with an upper arm part 21 and a lower arm part 23. At one end of the link member 20, a door side connecting part 27 extending vertically to connect the upper arm part 21 and the lower arm part 23 is provided. At the other end of the link member 20, a body side connecting part 25 extending vertically to connect the upper arm part 21 and the lower arm part 23 is provided. The body side connecting part 25 is curved to bulge from the other end to the one end.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a vehicle side door structure. [Background technology]

[0002] A side door attached to the side of a vehicle body so as to open and close a door opening provided on the side of the vehicle body has a structure in which the side door projects outward in parallel in the vehicle width direction and moves in the front-rear direction to open and close, as disclosed in Patent Document 1. This type of side door structure is called a glide sliding door or a slide door because it moves smoothly in parallel in the air away from the vehicle body.

[0003] The unit supporting the swing-slide door disclosed in Patent Document 1 includes a base member fixed near the rear entrance of the vehicle body side, and a parallel link, a door sliding mechanism, a door load support arm, and an opening / closing drive mechanism are provided on the base member. The parallel link has a front arm and a rear arm, one end of which is connected to the base member and the other end of which is connected to the door, and has a function of positioning each position of the door that swings along the movement trajectory of the door. In addition, the door load support arm has one end of which is connected to the base member on the vehicle body side and the other end of which is connected to the door, and supports the load of the door. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-137142 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned structure, when the door load support arm and the front and rear arms constituting the parallel link are arranged parallel to the rotation direction, stress is concentrated on the pivot support part (base member) supporting the door load, so it is necessary to improve the rigidity. However, improving the rigidity of the pivot support part increases the vehicle weight.

[0006] Furthermore, for example, when an attempt is made to increase the rigidity by making the shape more complex, the painting accuracy may decrease, and it may become difficult to ensure the quality. Therefore, in the structure of the above example, there is room for improvement in terms of increasing the support rigidity of the side door.

[0007] The present invention has been made to solve the above-mentioned problems, and its object is to provide a vehicle side door structure that can improve the rigidity of the link member that connects the side door to the vehicle body. [Means for solving the problem]

[0008] In order to achieve the above object, a vehicle side door structure according to the present invention has a side door connected to a vehicle body side portion by a link member for opening and closing a door opening provided in the vehicle body side portion, one end of the link member in a vehicle front-rear direction is rotatably connected to the side door and the other end is rotatably connected to the vehicle body side portion. In the vehicle side door structure, an upper arm portion extending in the vehicle front-rear direction is provided at an upper portion of the link member, a lower arm portion extending in the vehicle front-rear direction is provided at a lower portion of the link member, a door-side connecting portion extending in the vehicle vertical direction to connect the upper arm portion and the lower arm portion is provided at the one end of the link member, and a body-side connecting portion extending in the vehicle vertical direction to connect the upper arm portion and the lower arm portion is provided at the other end of the link member, the body-side connecting portion being curved so as to bulge from the other end toward the one end. Effect of the Invention

[0009] According to the present invention, it is possible to improve the rigidity of the link member that connects the side door and the vehicle body. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of an embodiment of a vehicle side door structure according to the present invention, as viewed from inside the vehicle. [Diagram 2] 2 is an enlarged front view of a link member etc. in FIG. 1, as viewed from the inside of the vehicle. [Diagram 3] FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view taken along the line BB in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of a vehicle side door structure for a vehicle according to the present invention will be described with reference to the drawings (FIGS. 1 to 4). In the drawings, the direction of the arrow Fr indicates the front in the vehicle longitudinal direction. In the description of the embodiment, the "front (front end) and rear (rear end)" correspond to the front and rear in the vehicle longitudinal direction. Also, the arrow In indicates the inside of the vehicle (inside in the vehicle width direction), and the arrow Out indicates the outside of the vehicle (outside in the vehicle width direction).

[0012] The side door 10 of this embodiment is a swing-slide type side door 10 that opens and closes a door opening 1 on the side of the vehicle body, and opens and closes by projecting outward in parallel with the vehicle width direction and moving in the front-rear direction. The vehicle body side to which the side door 10 of this embodiment is attached includes a center pillar 2, a quarter pillar 3, a quarter panel 4, a wheel house panel 5, etc.

[0013] The center pillar 2 is disposed in front of the door opening 1 and extends in the vertical direction of the vehicle. The quarter pillar 3 is disposed at the rear of the door opening 1 and extends in the vertical direction of the vehicle. The quarter panel 4 is a panel material disposed on the vehicle rear side of the quarter pillar 3. The wheel house panel 5 is provided below the quarter panel 4 and the quarter pillar 3, curves downward as it moves toward the inside of the vehicle, and is connected to the floor portion. The front portion of the wheel house panel 5 is disposed at the lower portion at the rear of the door opening 1.

[0014] Also, the lower end of the quarter pillar 3 is disposed on the vehicle inner side of the lower part of the wheel house panel 5. That is, the middle part of the quarter pillar 3 in the vehicle vertical direction is disposed at a position overlapping the upper part of the wheel house panel 5 when viewed in the vehicle width direction, and the quarter pillar 3 on the vehicle lower side of the middle part curves toward the vehicle inner side as it approaches the vehicle lower side to correspond to the curved shape of the wheel house panel 5, and is connected to the floor part. Also, a reinforcing member 18 is provided on the vehicle interior side of the wheel house panel 5 located on the vehicle front side of the quarter pillar 3. That is, in this example, the rear part of the door opening 1 is constituted by the quarter pillar 3, the reinforcing member 18, and the wheel house panel 5.

[0015] The upper surface of the reinforcing member 18 has a curved shape that protrudes upward in the vehicle so as to cover the upper portion and the inner portion in the vehicle width direction of the wheel house panel 5 from the upper side of the vehicle. A flange 18d provided at the lower portion of the reinforcing member 18 is joined to the wheel house panel 5 by spot welding or the like. Furthermore, flanges 18a, 18b provided at the rear portion of the reinforcing member 18 are joined by spot welding or the like to the inner wall surface and the front wall surface of the quarter pillar 3 that is arranged so as to overlap the wheel house panel 5 when viewed in the vehicle width direction.

[0016] The side door 10 of this embodiment includes a door outer panel and a door inner panel 11 joined to the vehicle inner side of the door outer panel. The door inner panel 11 has an opening, and a belt line portion 11a is provided at the upper portion of the opening. The door inner panel 11 also has a vertical member 15 extending in the vehicle vertical direction so as to connect the upper and lower portions of the opening. The upper portion of the vertical member 15 is joined to the belt line portion 11a constituting the upper portion of the opening, and the lower portion of the vertical member 15 is joined to the lower portion of the inner panel. A door side mounting member 30 (described later) is joined to the middle portion of the vertical member 15 in the vehicle vertical direction.

[0017] 1, the vehicle side door structure of this embodiment includes a link member 20 that connects a side door 10 to a vehicle body, a vehicle body side mounting member 40, and a door side mounting member 30. Each member will be described below.

[0018] First, the vehicle body side mounting member 40 will be described. The rear wall of the main body of the vehicle body side mounting member 40 faces the rear of the vehicle and extends in the vehicle vertical direction. In addition, since the rear wall is joined to the front wall surface of the quarter pillar 3, it is curved to correspond to the shape of the front wall surface. The upper and lower parts in the front part of the main body protrude forward of the vehicle, and the upper arm support part 41a and the lower arm support part 41b that support the link member 20 are provided in these protruding parts. In addition, an opening is provided in the center of the main body, and a plurality of ribs 46 extending in the vehicle longitudinal direction are provided in the opening. In this example, three ribs 46 are arranged at intervals from each other in the vehicle vertical direction.

[0019] As shown in FIG. 1, an upper joint 42 is provided at the upper part of the rear wall to be joined to the quarter pillar 3. In this example, the upper joint 42 may be joined to the front wall surface of the quarter pillar 3 by a bolt or the like, or may be joined by spot welding or the like. An upper flange 43 protruding toward the rear of the vehicle is provided at the inner end of the upper joint 42 in the vehicle width direction. The upper flange 43 is a portion to be joined to the quarter pillar 3, and as shown in FIG. 2, it extends in the vertical direction of the vehicle and has two bolt holes 43b aligned vertically. A bead 43b for reinforcement is provided around the bolt hole 43b. In this example, the upper flange 43 is fastened to the inner surface of the quarter pillar 3 by a bolt.

[0020] An intermediate joint portion that is joined to the rear wall surface of the quarter pillar 3 may be provided on the rear wall located below the upper joint portion 42. The intermediate joint portion may also be joined to the front wall surface of the quarter pillar 3 by bolts or the like, or may be joined by spot welding or the like.

[0021] Further, the lower part of the rear wall is inclined toward the front of the vehicle as it approaches the bottom of the vehicle. This inclined rear wall is formed so as to be able to abut against the upper surface of the reinforcing member 18. A lower joint 44 is provided on the front side of the lower end of the inclined surface, facing the rear of the vehicle and extending toward the rear of the vehicle, and a lower flange 45 is provided on the inner end of the lower joint 44 in the vehicle width direction, protruding toward the bottom of the vehicle. The lower joint 44 and the lower flange 45 are joined to the upper surface of the reinforcing member 18. In this example, the lower joint 44 and the lower flange 45 are fastened to a seat (not shown) provided on the upper surface of the reinforcing member 18 by bolts or the like. The lower joint 44 and the lower flange 45 may be joined to the reinforcing member 18 by spot welding or the like.

[0022] The upper arm support part 41a protrudes further forward from a protruding part at the top of the front side of the main body of the vehicle body side mounting part, and extends in the vertical direction of the vehicle. A rotating shaft (not shown) extending in the vertical direction of the vehicle is rotatably inserted inside the upper arm support part 41a. The rotating shaft protrudes from the upper end of the upper arm support part 41a toward the top of the vehicle, and an upper connecting part 21c of a link member 20 described later is rotatably connected to this protruding part, and the upper arm support part 41a supports the upper connecting part 21c.

[0023] The lower arm support part 41b protrudes forward from a portion of the lower arm support part 41b that is above the front end of the lower flange 45 and extends in the vertical direction of the vehicle. A rotating shaft is inserted into the lower arm support part 41b, as in the case of the upper arm support part 41a, and the rotating shaft protrudes from the upper end of the lower arm support part 41b. A lower connecting part 23c of the link member 20, which will be described later, is rotatably connected to this protruding portion, and the lower arm support part 41b supports the lower connecting part 23c. In this example, a reinforcing plate 47 extending vertically is provided to reinforce the base parts of the upper arm support part 41a and the lower arm support part 41b.

[0024] Next, the door-side mounting member 30 will be described. The door-side mounting member 30 is a plate extending in the vehicle vertical direction, and is joined to the vertical member 15 of the side door 10. In this example, bolt holes are provided at the upper and lower parts of the door-side mounting member 30, and the door-side mounting member 30 is fastened to the middle part of the vertical member 15 of the side door 10 in the vehicle vertical direction with a bolt.

[0025] The door-side mounting member 30 is provided with an upper mounting portion 31a and a lower mounting portion 31b. The upper mounting portion 31a and the lower mounting portion 31b are arranged at a distance from each other in the vertical direction of the vehicle. A rotating shaft is inserted into the upper mounting portion 31a and the lower mounting portion 31b, and the upper mounting portion 31a and the lower mounting portion 31b are connected to the link member 20 via the rotating shaft. The connection to the link member 20 will be explained later. In addition, the door-side mounting member 30 is provided with a bead 30a from the upper end to the lower end. The bead 30a is provided at a position corresponding to the upper mounting portion 31a and the lower mounting portion 31b, and the provision of the bead 30a reinforces a portion where a load is concentrated.

[0026] Next, the link member 20 will be described. One end of the link member 20 is rotatably connected to the side door 10, and the other end is rotatably connected to the vehicle body side. In this embodiment, one end of the link member 20 rotatably supports the side door 10 via the door side mounting member 30, and the other end is rotatably supported to the vehicle body side. The link member 20 of this embodiment has an upper arm portion 21, a lower arm portion 23, a door side connecting portion 27, and a body side connecting portion 25, which together form a rectangular frame shape. Furthermore, the link member 20 has a door side upper auxiliary portion 28c, a door side lower auxiliary portion 28d, a body side upper auxiliary portion 28a, and a body side lower auxiliary portion 28b. Each part will be described below. The link member 20 of this example is a member formed by casting using a mold, and the above-mentioned parts are integrally formed.

[0027] The upper arm portion 21 is provided on the top of the link member 20 and extends in the front-rear direction of the vehicle, and an upper door support portion 21d is provided on the front portion of the upper arm portion 21. The upper door support portion 21d is a portion that extends in the vertical direction of the vehicle, and a rotation shaft (not shown) that extends in the vertical direction of the vehicle is inserted into the upper door support portion 21d. The rotation shaft protrudes from the upper end of the upper door support portion 21d toward the top of the vehicle, and this protruding portion is inserted into the upper mounting portion 31a of the door side mounting member 30. As a result, the upper door support portion 21d supports the upper mounting portion 31a of the door side mounting member 30 in a state in which the upper door support portion 21d can rotate around the rotation shaft.

[0028] Additionally, an upper connecting portion 21c is provided at the rear of the upper arm portion 21. The upper connecting portion 21c is a portion that extends in the vertical direction of the vehicle, and a rotation shaft extending in the vertical direction of the vehicle can be inserted into the upper connecting portion 21c. A rotation shaft that protrudes from the upper end of the upper arm support portion 41a of the vehicle body side mounting member 40 is inserted into the upper connecting portion 21c. The upper connecting portion 21c is supported by the upper arm support portion 41a in a state in which it can rotate via the rotation shaft.

[0029] The lower arm portion 23 is provided at the lower part of the link member 20 and extends in the front-rear direction of the vehicle. Similarly to the upper arm portion 21, a lower door support portion 23d is provided at the front part of the lower arm portion 23. Similarly to the upper door support portion 21d, the lower door support portion 23d is a portion that extends in the vehicle vertical direction, and a rotation shaft (not shown) extending in the vehicle vertical direction is inserted therein. The rotation shaft protrudes from the upper end of the lower door support portion 23d toward the vehicle top, and this protruding portion is inserted into the lower mounting portion 31b of the door side mounting member 30. As a result, the lower door support portion 23d supports the lower mounting portion 31b of the door side mounting member 30 in a state in which the lower door support portion 23d is rotatable around the rotation shaft.

[0030] Similarly to the upper arm portion 21, a lower connecting portion 23c extending in the vehicle up-down direction is provided at the rear of the lower arm portion 23. A rotating shaft protruding from the upper end of the lower arm support portion 41b of the vehicle body side mounting member 40 is inserted into the lower connecting portion 23c. The lower connecting portion 23c is supported by the lower arm support portion 41b in a rotatable state via the rotating shaft.

[0031] The door side connecting portion 27 is provided at the front portion (one end in the vehicle front-rear direction) of the link member 20, and extends in the vehicle up-down direction so as to connect the upper arm portion 21 and the lower arm portion 23. In this example, the door side connecting portion 27 is disposed slightly rearward of the upper door support portion 21d and the lower door support portion 23d.

[0032] The body side connecting portion 25 is provided at the rear of the link member 20 (the other end in the vehicle front-rear direction) and extends in the vehicle up-down direction to connect the upper arm portion 21 and the lower arm portion 23. The body side connecting portion 25 is curved so as to bulge convexly from the rear end (the other end) toward the front of the vehicle. In this example, it has an arc shape that bulges toward the front of the vehicle. In this example, the body side connecting portion 25 is formed in a bow shape that curves toward the front of the vehicle to connect the upper connecting portion 21c and the lower connecting portion 23c.

[0033] With the above-mentioned configuration, the load from the side door 10 is input downward to the upper door support portion 21d and the lower door support portion 23d of the upper arm portion 21 and the lower arm portion 23. At this time, compressive stress is concentrated in the upper door support portion 21d, and tensile stress is generated in the lower connecting portion 23c of the lower arm portion 23. At that time, since the door-side connecting portion 27 connects the upper arm portion 21 and the lower arm portion 23, it is possible to transmit the load and suppress the accumulation of stress in the upper door support portion 21d of the upper arm portion 21.

[0034] Furthermore, the lower connecting portion 23c of the lower arm portion 23 is curved toward the door side (the vehicle front side in this example), so that it is possible to suppress concentration of stress on the lower connecting portion 23c of the lower arm portion 23 and the lower arm support portion 41b (so-called base vicinity) that supports it, by the body side connecting portion 25 curved toward the door side (the vehicle front side in this example). In detail, in the lower arm portion 23, a load toward the vehicle lower side is input to the lower door support portion 23d, and a load is input to the body side of the lower arm portion 23 (the rear portion of the lower arm portion 23 in this example) in a diagonally downward direction from the door side toward the body side. Here, the curved body side connecting portion 25 is curved so as to be convex toward the door side connecting portion 27, so that the load input to the lower arm portion 23 is easily supported in the curved direction, and is effectively distributed to the upper arm portion 21 along the curved shape.

[0035] In this embodiment, the upper arm portion 21 is provided with an upper curved portion 21a that bulges downward of the vehicle, and the lower arm portion 23 is provided with a lower curved portion 23a that bulges upward of the vehicle. The upper curved portion 21a is provided mainly at the rear of the upper arm portion 21, and curves so as to bulge upward of the vehicle as it approaches the rear end (the other end). The front portion of the upper arm portion 21 extends horizontally in the front-rear direction of the vehicle.

[0036] In this example, the upper curved portion 21a curves upward from a predetermined position of the upper arm portion 21 in the vehicle front-rear direction toward the upper connecting portion 21c. The end of the upper curved portion 21a closer to the door-side connecting portion 27 is disposed closer to the front end (one end) of the upper arm portion 21 than the body-side connecting portion 25. That is, the predetermined position where the upper curved portion 21a starts to curve upward (the lower end of the upper curved portion 21a) is disposed further forward of the front end of the body-side connecting portion 25. The front end of the body-side connecting portion 25 is disposed approximately in the center of the body-side connecting portion 25 in the vehicle up-down direction.

[0037] The lower curved portion 23a has an apex at a predetermined position of the lower arm portion 23 in the vehicle front-rear direction, inclines downward from the apex toward the lower connecting portion 23c (toward the rear of the vehicle), and curves downward from the apex toward the lower support portion (toward the front of the vehicle). In this example, the apex (upper end of the lower curved portion 23a) is located further forward than the front end of the body side connecting portion 25. Also, the front end of the lower arm portion 23 is located lower than the rear end.

[0038] By providing the upper curved portion 21a and the lower curved portion 23a on the upper arm portion 21 and the lower arm portion 23, respectively, and forming a shape that conforms to the curved body side connecting portion 25, the rigidity of the upper connecting portion 21c of the upper arm portion 21 and the lower connecting portion 23c of the lower arm portion 23 is improved. In other words, a load is input to the upper arm portion 21 along the upper curved portion 21a, and this load is also distributed to the body side connecting portion 25 along the upper curved portion 21a. In addition, a load is also input to the lower arm portion 23 along the lower curved portion 23a, and the load is distributed to the body side connecting portion 25. This makes it possible to prevent the load from concentrating only on the upper arm portion 21 and the lower arm portion 23.

[0039] The link member 20 (upper arm portion 21 and lower arm portion 23) has a front portion on the door side disposed toward the lower side of the vehicle compared to a rear portion on the body side. This makes it possible to support the side door 10 in a direction that pulls it toward the vehicle body with the upper arm portion 21.

[0040] Next, the body side upper auxiliary part 28a and the body side lower auxiliary part 28b will be described. The body side upper auxiliary part 28a is provided at the body side upper corner part 29a formed by the body side connecting part 25 and the upper arm part 21. The body side upper auxiliary part 28a is a plate-like part facing in the vehicle width direction. The body side upper auxiliary part 28a is also a plate-like part connecting between the upper curved part 21a and the curved shape located at the upper part of the body side connecting part 25, and the front end of the body upper auxiliary part is formed in an arc. In other words, the front end of the body side upper auxiliary part 28a forms the arc-shaped edge of the frame-shaped opening 20a.

[0041] The body-side lower auxiliary part 28b is provided at a body-side lower corner part 29b formed by the body-side connecting part 25 and the lower arm part 23. Like the body-side upper auxiliary part 28a, the body-side lower auxiliary part 28b is a plate-like part that faces in the vehicle width direction and connects between the lower curved part 23a and the curved shape located at the lower part of the body-side connecting part 25, and the front end of the body-side lower auxiliary part 28b forms the arc-shaped edge of the frame-shaped opening 20a.

[0042] This improves the rigidity of the body side upper corner 29a and the body side lower corner 29b, and even if a load is input to the upper arm portion 21 and the lower arm portion 23, it is possible to suppress deformation of the shape of the upper arm portion 21 and the lower arm portion 23, thereby promoting distribution of the load.

[0043] Next, the door-side upper auxiliary portion 28c and the door-side lower auxiliary portion 28d will be described. The door-side upper auxiliary portion 28c is provided at the door-side upper corner portion 29c formed by the door-side connecting portion 27 and the upper arm portion 21. The door-side upper auxiliary portion 28c is plate-shaped and faces in the vehicle width direction. An arc is formed on the periphery of the door-side upper auxiliary portion 28c facing the body-side connecting portion 25. That is, the rear end of the door-side upper auxiliary portion 28c forms the arc-shaped edge of the frame-shaped opening 20a.

[0044] The door-side lower auxiliary portion 28d is provided at a door-side lower corner portion 29d formed by the door-side connecting portion 27 and the lower curved portion 23a at the rear of the lower arm portion 23. The door-side lower auxiliary portion 28d is plate-shaped facing the vehicle width direction. An arc is formed on the periphery of the door-side lower auxiliary portion 28d facing the body-side connecting portion 25. That is, the rear end of the door-side lower auxiliary portion 28d forms the arc-shaped edge of the frame-shaped opening 20a. The frame-shaped opening 20a of the link member 20 of this embodiment has a substantially rectangular shape with R-chamfered corners due to the formation of the auxiliary portions 29a to 29d.

[0045] This improves the rigidity of the door-side upper corner 29c and the door-side lower corner 29d, and even if a load is input to the upper arm portion 21 and the lower arm portion 23, it is possible to suppress deformation of the shapes of the upper arm portion 21 and the lower arm portion 23, and to promote distribution of the load. Furthermore, in this embodiment, arcs are formed at the edges of the body-side upper auxiliary portion 28a and the body-side lower auxiliary portion 28b, and at the edges of the door-side upper auxiliary portion 28c and the door-side lower auxiliary portion 28d, so that the effect of dispersing the load input to the upper arm portion 21 and the lower arm portion 23 can be improved.

[0046] In this embodiment, as shown in Fig. 3, the upper arm portion 21 and the lower arm portion 23 have a U-shaped cross section. In this example, the U-shape opens to the inside of the vehicle. This makes it possible to improve the rigidity against loads in the vertical direction of the vehicle, and also has the effect of reducing the surface area of ​​the arm portions, thereby improving paintability.

[0047] In this embodiment, as shown in Fig. 4, the body side connecting portion 25 and the door side connecting portion 27 have a U-shaped cross section. In this example, the U-shape opens to the inside of the vehicle. This has the effect of improving rigidity and reducing surface area, similar to the arm portion, thereby improving paintability.

[0048] The description of the present embodiment is merely an example for explaining the present invention, and does not limit the invention described in the claims. Furthermore, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims.

[0049] In this embodiment, auxiliary parts 28a-28b are provided inside the four corners of the frame-shaped opening 20a in order to reinforce the corners of the frame-shaped link member 20. For example, as shown in Fig. 2, an outer auxiliary part 28e or the like may be provided on the upper part of the rear part of the body side connecting part 25. If the outer auxiliary part 28e is connected in a plate shape across the body side connecting part 25, it may not have a desired load transmission path, so the outer auxiliary part 28e shown in Fig. 2 is preferable. [Explanation of symbols]

[0050] 1 Door opening 2 Center pillar 3 Quarter Pillar 4 Quarter Panel 5 Wheelhouse Panel 10 Side Door 11 Door inner panel 11a Belt line section 15 Vertical members 18 Reinforcement members 20 Link member 20a Frame-shaped opening 21 Upper arm section 21a Upper curved part 21c Upper connection part 21d Upper door support 23 Lower arm section 23a Lower curved part 23c Lower connection part 23d Lower door support 25 Body side connection 27 Door side connection 28a Body side upper auxiliary part 28b Body side lower auxiliary part 28c Door side upper auxiliary part 28d Door side lower auxiliary part 28e outer auxiliary part 29a Upper corner of body side 29b Lower corner of body side 29c Door side upper corner 29d Lower corner of door side 30 Door side mounting material 30a bead 31a Upper mounting part 31b Lower mounting part 40 Vehicle body side mounting member 41a Upper arm support 41b Lower arm support 42 Upper joint 43 Upper flange 43a Bolt hole 43b Bead 44 Lower joint 45 Lower flange 46 Ribs 47 Reinforcement plate

Claims

1. A vehicle side door structure having a side door connected to a vehicle body side portion by a link member for opening and closing a door opening provided in the vehicle body side portion, one end of the link member in the vehicle front-rear direction is rotatably connected to the side door, and the other end is rotatably connected to the vehicle body side portion, an upper arm portion extending in a front-rear direction of the vehicle is provided at an upper portion of the link member, and a lower arm portion extending in the front-rear direction of the vehicle is provided at a lower portion of the link member, a door-side connecting portion extending in a vehicle up-down direction so as to connect the upper arm portion and the lower arm portion to each other is provided at the one end of the link member; a body side connecting portion extending in a vehicle up-down direction so as to connect the upper arm portion and the lower arm portion to each other is provided at the other end of the link member, A vehicle side door structure, wherein the body side connecting portion is curved so as to bulge from the other end toward the one end.

2. 2. The vehicle side door structure according to claim 1, wherein the upper arm portion is provided with an upper curved portion that bulges downwardly of the vehicle, and the lower arm portion is provided with a lower curved portion that bulges upwardly of the vehicle.

3. 3. The vehicle side door structure according to claim 2, wherein a lower end of the upper curved portion and an upper end of the lower curved portion are disposed closer to the one end than the body side connecting portion.

4. 4. A vehicle side door structure as claimed in any one of claims 1 to 3, characterized in that a plate-shaped body side auxiliary portion facing in the vehicle width direction is provided at each of a body side upper corner formed by the body side connecting portion and the upper arm portion, and a body side lower corner formed by the body side connecting portion and the lower arm portion.

5. 5. The vehicle side door structure according to claim 1, wherein a plate-shaped door-side auxiliary portion facing in the vehicle width direction is provided at each of a door-side upper corner portion formed by the door-side connecting portion and the upper arm portion, and a door-side lower corner portion formed by the door-side connecting portion and the lower arm portion, and an arc is formed on a peripheral edge of the door-side auxiliary portion facing the body-side connecting portion.

6. 6. The vehicle side door structure according to claim 1, wherein the upper arm portion and the lower arm portion have a U-shaped cross section.

7. 7. The vehicle side door structure according to claim 1, wherein the body side connecting portion and the door side connecting portion have a U-shaped cross section.

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