JP6828326B2 - Vehicle backdoor structure - Google Patents

Description

The present invention relates to a vehicle back door structure.

A reinforcing member is arranged at a predetermined position on an inner panel constituting the inner surface of a vehicle back door of a vehicle such as an automobile (for example, Patent Document 1). The vehicle back door structure described in Patent Document 1 includes a reinforcing member arranged at a substantially central portion in the vehicle width direction of the lower side portion of the inner panel.

In the back door structure of this vehicle, the periphery of the latch opening provided in the latch mounting portion on the lower side of the inner panel is reinforced by a reinforcing member, and a side wall portion is provided on the side portion of the reinforcing member in the vehicle width direction. The side wall portion extends in the front-rear direction and connects the inner panel and the outer panel. Patent Document 1 states that the rigidity can be ensured by the side wall portion by providing the side wall portion on the vehicle width direction side portion of the reinforcing member.

Japanese Unexamined Patent Publication No. 2011-148436

However, the technique described in Patent Document 1 merely reinforces the inner panel, and no measures are taken to increase the rigidity of the outer panel. In Patent Document 1, although the outer panel is supported by the side wall portion provided on the reinforcing member for reinforcing the inner panel, it is difficult to increase the rigidity of the outer panel and suppress the stickiness (deformation). Even if the thickness of the outer panel is increased to increase the rigidity, the weight will increase as the thickness increases.

In view of such a problem, an object of the present invention is to provide a vehicle back door structure capable of increasing the rigidity of the door outer panel and suppressing deformation.

In order to solve the above problems, a typical configuration of the vehicle back door structure according to the present invention includes a door outer panel forming an outer surface of the vehicle back door on which a window frame is formed and an inner surface of the vehicle back door. In a vehicle back door structure comprising a constituent door inner panel, the vehicle back door structure further comprises a reinforcing member arranged between the door outer panel and the door inner panel and joined to the door outer panel. It is located between the two corners of the lower edge of the window frame and has a vehicle width dimension that covers more than half of the width direction of the area below the window frame of the door outer panel. It is characterized in that it extends from the lower end to a position separated by a vertical dimension of at least half of the vertical length of the area.

According to the present invention, it is possible to provide a vehicle back door structure capable of increasing the rigidity of the door outer panel and suppressing deformation.

It is a figure which shows schematic the vehicle to which the back door structure for a vehicle which concerns on embodiment of this invention is applied. It is a figure which shows the state which the door inner panel was omitted from the back door structure for a vehicle of FIG. It is an enlarged view which shows a part of the back door structure for a vehicle of FIG. It is a figure which shows the state which saw the back door structure for a vehicle of FIG. 1 from the inside of a vehicle. It is sectional drawing of the back door structure for a vehicle of FIG.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such an embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

The vehicle back door structure according to the embodiment of the present invention includes a door outer panel that constitutes the outer surface of the vehicle back door on which the window frame is formed, and a door inner panel that constitutes the inner surface of the vehicle back door. In the vehicle back door structure, the vehicle back door structure further comprises a reinforcing member arranged between the door outer panel and the door inner panel and joined to the door outer panel, the reinforcing member having two corners at the lower end of the window frame. Located between the parts, it has a vehicle width dimension that covers more than half of the vehicle width direction of the area below the window frame of the door outer panel, from the lower end of the window frame to the vertical direction of the area. It is characterized in that it extends to a position separated by a vertical dimension of more than half of the length.

According to the above configuration, the reinforcing members are arranged and joined in a range of the door outer panel that is easily deformed. The above range is located between two highly rigid corners of the lower end of the window frame, the shape of the lower end of the window frame is formed by a curve that is almost straight, the curvature is small, and there is no unevenness. , It is assumed that the range has a gentle curved surface shape. By arranging the reinforcing member in the above range, the rigidity of the door outer panel is improved, so that the stickiness (deformation) can be suppressed. Further, by suppressing the deformation of the door outer panel, the rigidity of the entire back door for the vehicle is improved. Therefore, it is possible to reduce the noise caused by the change in sound pressure in the vehicle interior caused by the deformation of the entire vehicle back door. Furthermore, since the rigidity of the entire back door for vehicles is improved, sufficient rigidity can be secured even if not only the thickness of the reinforcing member but also the thickness of the door outer panel and the door inner panel is reduced, and the weight can be reduced. ..

The above door inner panel has an abutting portion that comes into contact with the vehicle body when the back door for a vehicle is closed, and the reinforcing member includes an upper end portion sandwiched between the door outer panel and the door inner panel at the lower end of the window frame. The middle part of the door outer panel that is continuous from the upper end and is in contact with the lower area of the window frame, and the lower end that is continuous from the middle part and extends away from the door outer panel toward the door inner panel and is fixed to the door inner panel. It is preferable to have a lower end portion thereof whose height in the vehicle vertical direction is equal to the height of the contact portion in the vehicle vertical direction. As a result, when the contact portion receives an impact from the vehicle body when the back door for the vehicle is closed, the impact received by the contact portion is set at the same position as the height of the contact portion in the vehicle vertical direction. It is easily transmitted to the lowermost end of the lower end portion. The impact transmitted to the lowermost end of the lower end of the reinforcing member is transmitted from the lower end to the intermediate part in contact with the door outer panel, and further transmitted to the highly rigid upper end sandwiched between the door outer panel and the door inner panel. Will be done. In this way, the reinforcing member can efficiently disperse the impact and reduce the deformation of the door inner panel when the vehicle back door is closed.

Further, since the lowermost end of the lower end portion of the reinforcing member extends downward to the vehicle in the vertical direction of the vehicle at the contact portion of the door inner panel, the rigidity of the door inner panel can be increased. Therefore, a large opening can be provided in the door inner panel. Note that this opening is used for accessing the parts from the outside when, for example, arranging parts such as wiring inside the back door for a vehicle. Therefore, since a large opening can be provided in the door inner panel, workability when arranging the parts can be improved, and the weight can be further reduced.

The vehicle backdoor structure described above further comprises a drive unit provided at the upper end of the window frame of the door outer panel to drive the wiper, and the reinforcing member further comprises one or more beads extending along an inflection point-free trajectory. It is good to have a part. The drive unit, which is a heavy object in this way, is provided at the upper end of the window frame and does not exist in the area below the window frame where the reinforcing member is arranged. Therefore, the vehicle back door does not deform the region of the vehicle back door on the lower side of the window frame due to the weight of the drive unit even if the vehicle body is repeatedly opened and closed. As a result, the deformation of the entire back door for the vehicle can be suppressed, and the noise caused by the change in sound pressure in the vehicle interior can be reduced.

Furthermore, since there is no drive unit in the area below the window frame of the vehicle back door, the shape of the reinforcing member is not restricted by the drive unit and extends along a trajectory without inflection points (bending points). One or more bead portions can be formed. By forming such a bead portion on the reinforcing member, stress concentration can be avoided, the rigidity of the reinforcing member can be increased, and deformation can be further suppressed.

The above-mentioned bead portion includes a plurality of first beads extending along a linear locus in the vertical direction, and a plurality of second beads extending along a curved locus that draws a divergent shape from above to downward. It has a plurality of third beads extending along a concentric arcuate locus that is convex downward, and the first bead, the second bead, and the third bead are raised toward the door outer panel and are in contact with the door outer panel. It is good to be there. As a result, the load input to the reinforcing member is transmitted to a plurality of paths along the shapes of the first bead, the second bead, and the third bead. Therefore, stress concentration is less likely to occur, and deformation of the reinforcing member can be sufficiently suppressed.

Further, since the plurality of first beads, second beads, and third beads are in contact with the door outer panel, a sealer or the like can be applied to the contact points between these beads and the door outer panel to appropriately set the joint points. In particular, if a contact point that can effectively suppress the deformation of the door outer panel with respect to a load is set as a joint point, the rigidity of the door outer panel can be increased. Further, the reinforcing member can easily change the position and number of joint points on these beads. Therefore, the reinforcing member can be commonly used for specifications having different positions and numbers of joint points, and parts can be standardized.

FIG. 1 is a diagram schematically showing a vehicle 102 to which the vehicle back door structure 100 according to the embodiment of the present invention is applied. The figure schematically shows a state in which the vehicle 102 is viewed from diagonally behind the vehicle with the vehicle back door 104 installed at the rear of the vehicle 102 closed.

The vehicle back door structure 100 includes a door outer panel 106 that constitutes the outer surface of the vehicle back door 104, a door inner panel 108 that constitutes the inner surface of the vehicle back door 104, and a reinforcing member 110 (see FIG. 2). .. Further, a window frame 112 is formed on the door outer panel 106 and the door inner panel 108.

On the door inner panel 108, for example, balancer fixing portions 114 and 116, abutting portions 118 and 120 and door hinges 122 and 124 shown by dotted lines in the drawing are arranged. One ends 126a, 128a of the balancers 126, 128 for keeping the vehicle back door 104 open are attached to the balancer fixing portions 114, 116. The other ends 126b and 128b of the balancers 126 and 128 are attached to the vehicle body 130.

The contact portions 118 and 120 are portions that come into contact with the vehicle body 130 when the vehicle back door 104 is closed. The door hinges 122 and 124 are attached to the upper end 132 of the window frame 112 and further attached to the vehicle body 130. As a result, the vehicle body 130 supports the vehicle back door 104 so as to be openable and closable via the door hinges 122 and 124. Further, door hinge reinforcements 134 and 136 (see FIG. 2) are attached to the door inner panel 108 to reinforce the periphery of the door hinges 122 and 124.

In the area 138 below the window frame 112 of the door outer panel 106, the shape of the lower end 140 of the window frame 112 is formed by a curve close to a straight line, the curvature is small, there is no unevenness, and a gentle curved surface shape is formed. ing. Therefore, the area 138 of the door outer panel 106 includes a range that is easily deformed when a load is input, such as the back door 104 for a vehicle being repeatedly opened and closed.

Therefore, in the present embodiment, a configuration is adopted in which the reinforcing member 110 is arranged and joined in a range of the door outer panel 106 that is easily deformed to increase the rigidity of the door outer panel 106 and suppress the deformation.

FIG. 2 is a view showing a state in which the door inner panel 108 is omitted from the vehicle back door structure 100 of FIG. 1 as viewed from the inside of the vehicle. However, in the figure, for convenience, the balancer fixing portions 114 and 116, the contact portions 118 and 120 and the door hinges 122 and 124 provided on the door inner panel 108 are shown by dotted lines.

The reinforcing member 110 of the vehicle back door structure 100 is arranged between the door outer panel 106 and the door inner panel 108, and is joined so as to overlap the door outer panel 106 in a deformable range. That is, the reinforcing member 110 is located between the two corners 142 and 144 of the lower end 140 of the window frame 112 in the vehicle width direction, and has the vehicle width direction dimension La. The vehicle width direction dimension La of the reinforcing member 110 is more than half of the vehicle width direction length Lb of the region 138 of the door outer panel 106 (that is, La> Lb / 2).

As shown in FIG. 2, the corner portions 142 and 144 are located at the end of the curve drawn by the left and right edges 146 and 148 of the window frame 112. Further, since the outer side in the vehicle width direction is curved and has higher rigidity than the corners 142 and 144 of the lower end 140 of the window frame 112, it is not necessary to reinforce with the reinforcing member 110.

Further, since the lower end 140 of the window frame 112 located between the corners 142 and 144 is linear and has low rigidity, it is necessary to reinforce the lower end 140 of the window frame 112. Therefore, the reinforcing member 110 extends from the lower end 140 of the window frame 112 to a position separated by the vertical dimension Lc in the vertical direction of the vehicle. The vertical dimension Lc of the reinforcing member 110 is more than half of the vertical length Ld of the region 138 (that is, Lc> Ld / 2). However, the reinforcing member 110 extends downward so as to avoid the handle installation hole 150 provided in the center of the area 138 of the door outer panel 106.

Further, as shown in the drawing, the height of the upper end portion 152 of the reinforcing member 110 in the vehicle vertical direction is equal to the height of the balancer fixing portions 114 and 116 in the vehicle vertical direction. Further, in the reinforcing member 110, the height of the lowermost end 156 of the lower end 154 in the vehicle vertical direction is equal to the height of the contact portions 118 and 120 in the vehicle vertical direction. Further, the attachment points of the door hinges 122 and 124 in the vehicle width direction are located inside the both ends 158 and 160 of the reinforcing member 110 in the vehicle width direction.

The vehicle back door structure 100 further includes a drive unit 164 which is a heavy object for driving the wiper 162 (see FIG. 1). The drive unit 164 is provided at the upper end 132 of the window frame 112 of the door outer panel 106, and does not exist in the area 138 of the door outer panel 106 in which the reinforcing member 110 is arranged. Therefore, even if the vehicle back door 104 is repeatedly opened and closed with respect to the vehicle body 130, the region 138 of the door outer panel 106 is not deformed by the inertial force caused by the weight of the drive unit 164.

Further, there is no drive unit 164 in the area 138 of the door outer panel 106. Therefore, the shape of the reinforcing member 110 is not restricted by the drive unit 164, and a bead portion 166 (see FIG. 3) extending along a locus without an inflection point (bending point) can be formed.

FIG. 3 is an enlarged view showing a part of the vehicle back door structure 100 of FIG. As shown in the figure, the bead portion 166 formed on the reinforcing member 110 has a plurality of first beads 168a, 168b, 168c, and 168d indicated by an alternate long and short dash line. The plurality of first beads 168a to 168d extend along a linear locus in the vertical direction. Further, the mounting positions of the door hinges 122 and 124 shown in FIG. 2 in the vehicle width direction are located inside the first beads 168a and 168d located on the outermost side in the vehicle width direction among the plurality of first beads 168a to 168d. doing.

The bead portion 166 further has a plurality of second beads 170a, 170b, 170c, 170d indicated by a dotted line, and a plurality of third beads 172a, 172b indicated by a two-dot chain line. The plurality of second beads 170a to 170d extend along a curved locus that draws a divergent shape from the upper side to the lower side. The plurality of third beads 172a and 172b extend along a concentric arcuate locus that is convex downward.

The first beads 168a to 168d, the second beads 170a to 170d, and the third beads 172a and 172b are raised toward the door outer panel 106 and are in contact with the door outer panel 106. Therefore, a sealer or the like can be applied to the contact portion between the bead portion 166 and the door outer panel 106 to appropriately set the joint point. In particular, the rigidity of the door outer panel 106 can be increased by setting a contact point that can effectively suppress the deformation of the door outer panel 106 with respect to a load as a joint point. Further, since the reinforcing member 110 can easily change the position and number of joint points at the bead portion 166, it can be commonly used for specifications having different positions and numbers of joint points, and the parts should be standardized. You can also.

Further, spot hitting points 174, 176, and 178 are formed on the reinforcing member 110. A plurality (five here) of spot spots 174 are formed on the upper end portion 152 overlapping the lower end 140 of the window frame 112. At the spot dot 174, the reinforcing member 110, the door inner panel 108, and the door outer panel 106 are joined.

A plurality of spot spots 176 (here, eight) are formed at both ends 180, 182 and the lower end 154 of the upper end 152 of the reinforcing member 110. At the spot spot 176, the reinforcing member 110 and the door inner panel 108 are joined together.

A plurality of spot spots 178 (here, four) are formed in the center of the window frame 112 in the vehicle width direction near the lower end 140. At the spot spot 178, the reinforcing member 110 and the door outer panel 106 are joined together. In this way, the reinforcing member 110 is not only joined to the door outer panel 106 by applying a sealer or the like, but is also joined to the door outer panel 106 and the door inner panel 108 by the spot spots 174, 176, and 178.

FIG. 4 is a diagram showing a state in which the vehicle back door structure 100 of FIG. 1 is viewed from the inside of the vehicle. In the figure, the door inner panel 108 omitted in FIG. 2 is shown. However, the drive unit 164 provided on the door outer panel 106 is not shown. FIG. 5 is a cross-sectional view of the vehicle back door structure 100 of FIG.

As shown in FIG. 4, an opening 184 is provided in the center of the lower side of the window frame 112 of the door inner panel 108. The opening 184 is used to access the parts from the outside when arranging the parts such as the harness inside the back door 104 for the vehicle.

In the vehicle back door structure 100, as shown in the cross section AA of FIG. 5A, the door hinge reinforcement 134 is sandwiched between the door outer panel 106 and the door inner panel 108 at the upper end 132 of the window frame 112. Further, in the vehicle back door structure 100, the upper end portion 152 of the reinforcing member 110 is sandwiched between the door outer panel 106 and the door inner panel 108 at the lower end 140 of the window frame 112. Further, the height of the upper end portion 152 of the reinforcing member 110 in the vehicle vertical direction is equal to the height of the balancer fixing portions 114 and 116 in the vehicle vertical direction as shown in FIG. The upper end portion 152 of the reinforcing member 110 is sandwiched between the door outer panel 106 and the door inner panel 108 even at the center in the vehicle width direction shown in the BB cross section of FIG. 5B, and has high rigidity.

Further, as shown in FIG. 5A, the reinforcing member 110 has an intermediate portion 186 continuous from the upper end portion 152 in contact with the region 138 of the door outer panel 106. The lower end portion 154 of the reinforcing member 110 is continuous from the intermediate portion 186, extends away from the door outer panel 106 toward the door inner panel 108, and is fixed to the door inner panel 108. Further, the height of the lowermost end 156 of the lower end portion 154 of the reinforcing member 110 in the vehicle vertical direction is equal to the height of the contact portions 118 and 120 in the vehicle vertical direction as shown in FIG. The reinforcing member 110 has an intermediate portion 186 extending to the vicinity of the hole 150 for installing the handle of the door outer panel 106 at the center in the vehicle width direction shown in the BB cross section of FIG. 5 (b).

Here, as an example, a case where the contact portions 118 and 120 of the door inner panel 108 are impacted by the vehicle body 130 when the vehicle back door 104 is closed will be described. The impact received by the contact portions 118 and 120 is easily transmitted to the lower end portion 154 of the reinforcing member 110 set at the same position as the height of the contact portions 118 and 120 in the vertical direction of the vehicle. The impact transmitted to the lower end portion 154 of the reinforcing member 110 is transmitted from the lower end portion 154 to the intermediate portion 186 in contact with the door outer panel 106. The impact transmitted to the intermediate portion 186 is transmitted to the highly rigid upper end portion 152 sandwiched and fixed between the door outer panel 106 and the door inner panel 108.

As another example, a case where the balancer fixing portions 114 and 116 of the door inner panel 108 are impacted by the vehicle body 130 due to the opening / closing operation of the vehicle back door 104 will be described. The impact received by the balancer fixing portions 114 and 116 is easily transmitted to the highly rigid upper end portion 152 of the reinforcing member 110 set at the same position as the height of the balancer fixing portions 114 and 116 in the vertical direction of the vehicle. The impact transmitted to the upper end portion 152 of the reinforcing member 110 is transmitted from the upper end portion 152 to the intermediate portion 186 in contact with the door outer panel 106. The impact transmitted to the intermediate portion 186 is transmitted to the lower end portion 154 fixed to the door inner panel 108. In this way, the reinforcing member 110 can efficiently disperse the impact received by the vehicle back door 104, and can reduce the deformation of the vehicle back door 104.

Further, the load input to the reinforcing member 110 is the load of the plurality of first beads 168a to 168d, the second beads 170a to 170d, and the third beads 172a, 172b extending along the locus without inflection points as shown in FIG. It is transmitted and dispersed in multiple paths along the shape. By forming the bead portion 166 on the reinforcing member 110 in this way, stress concentration is less likely to occur, the rigidity of the reinforcing member 110 can be increased, and deformation can be sufficiently suppressed.

Further, since the lowermost end 156 of the lower end portion 154 of the reinforcing member 110 extends downward to the height of the contact portions 118 and 120 of the door inner panel 108 in the vertical direction of the vehicle, the rigidity of the door inner panel 108 can be increased. it can. Therefore, the door inner panel 108 can be provided with the relatively large opening 184 shown in FIG. Therefore, workability when arranging parts such as a harness inside the vehicle back door 104 can be improved, and further weight reduction can be achieved. Further, a portion for fixing the harness may be appropriately set in the reinforcing member 110 to further improve workability.

According to the vehicle back door structure 100 of the present embodiment, since the reinforcing member 110 is arranged and joined in a range of the door outer panel 106 that is easily deformed, the rigidity of the door outer panel 106 is improved and deformation can be suppressed. Further, by suppressing the deformation of the door outer panel 106, the rigidity of the entire vehicle back door 104 is improved, and the deformation of the entire vehicle back door 104 can be suppressed. Therefore, it is possible to reduce the noise caused by the change in sound pressure in the vehicle interior caused by the deformation of the vehicle back door 104. Further, since the rigidity of the entire back door 104 for the vehicle is improved, sufficient rigidity can be secured even if not only the thickness of the reinforcing member 110 but also the thickness of the door outer panel 106 and the door inner panel 108 is reduced, resulting in weight reduction. Can be planned.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

The present invention can be used for a vehicle back door structure.

100 ... Vehicle back door structure, 102 ... Vehicle, 104 ... Vehicle back door, 106 ... Door outer panel, 108 ... Door inner panel, 110 ... Reinforcing member, 112 ... Window frame, 114, 116 ... Balancer fixing part, 118, 120 ... contact portion, 122, 124 ... door hinge, 126, 128 ... balancer, 126a, 128a ... one end of balancer, 126b, 128b ... other end of balancer, 130 ... vehicle body, 132 ... upper end of window frame, 134, 136 ... Door hinge reinforcement, 138 ... Door outer panel area, 140 ... Lower end of window frame, 142, 144 ... Corner of window frame, 146, 148 ... Edge of window frame, 150 ... Hole for handle installation, 152 ... Reinforcing member 154 ... Lower end of the reinforcing member, 156 ... Lower end of the lower end of the reinforcing member, 158, 160 ... Both ends of the reinforcing member in the vehicle width direction, 162 ... Wiper, 164 ... Drive, 166 ... Bead , 168a, 168b, 168c, 168d ... 1st bead, 170a, 170b, 170c, 170d ... 2nd bead, 172a, 172b ... 3rd bead, 174, 176, 178 ... Spot dot, 180, 182 ... Upper end of reinforcing member Both ends of the part, 184 ... Door inner panel opening, 186 ... Intermediate part of reinforcing member

Claims (4)

In a vehicle back door structure including a door outer panel forming an outer surface of a vehicle back door on which a window frame is formed and a door inner panel forming an inner surface of the vehicle back door.
The vehicle backdoor structure further comprises a reinforcing member arranged between the door outer panel and the door inner panel and joined to the door outer panel.
The reinforcing member has one or more bead portions extending along an inflection point-free trajectory.
The bead portion
Multiple first beads extending along a linear trajectory in the vertical direction,
Multiple second beads extending along a curved trajectory that draws a divergent shape from top to bottom,
It has a plurality of third beads extending along a concentric arcuate locus that is convex downward.
A vehicle back door structure , wherein the first bead, the second bead, and the third bead are raised toward the door outer panel and are in contact with the door outer panel . The reinforcing member is
It is located between the two corners of the lower end of the window frame and has a vehicle width direction dimension that extends over half or more of the vehicle width direction length of the area below the window frame of the door outer panel.
The vehicle back door structure according to claim 1, wherein the window frame extends from the lower end to a position separated by a vertical dimension of at least half the vertical length of the region. The door inner panel has a contact portion that comes into contact with the vehicle body when the vehicle back door is closed.
The reinforcing member is
An upper end portion sandwiched between the door outer panel and the door inner panel at the lower end of the window frame, and
An intermediate portion of the door outer panel that is continuous from the upper end portion and is in contact with the lower region of the window frame, and
It is a lower end portion that is continuous from the intermediate portion, extends away from the door outer panel and extends toward the door inner panel, and is fixed to the door inner panel. The vehicle back door structure according to claim 2 , further comprising a lower end portion equal to a height in the vertical direction. The back door structure for a vehicle further includes a vehicle according to any one of claims 1 to 3, wherein the obtaining Bei a driver for driving a wiper provided on an upper end of the window frame of the door outer panel For back door structure.

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