JP2018176926A - Back door opening part structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent twist deformation of a back door opening part by receiving loading weight providing an effect on deformation of the back door opening part and by distributing load on the reinforce to a broad range region via a bridge part.SOLUTION: A back door opening part 1 is formed with a vehicle body panel comprising an inner panel 3 having a projecting part 30 projecting inside of a vehicular room. A convex shape ridgeline 30A formed on the inner panel 3 extends from an upper part to a lower part of the back door opening part 1. At a site extending along the ridgeline 30A and overlapping with the ridgeline 30A on backside of the inner panel 3 where the projecting part 30 is provided within an area of a lower curve part 1b where the ridgeline 30A shifts from vehicle vertical direction to vehicle width direction, provided are a reinforce 7 comprising a joint part 7a for the inner panel 3 and a bridge part 8 which is provided from the reinforce 7 in vertical direction of the ridgeline 30A of the lower curve part 1b and bridges with a rear skirt panel 11 of an outer panel.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a back door opening structure of a vehicle.

The back of the hatchback type vehicle is provided with a back door opening which is opened and closed by a back door. Since such a back door opening is formed of a vehicle body panel arranged to surround the back door having a large area, the rigidity around the back door opening is reduced. Therefore, for the back door opening structure of the vehicle, it is required to prevent the deformation of the back door opening.
By the way, as a load that affects the deformation of the back door opening, there is a road surface load based on the vibration transmitted from the road surface via the rear wheel. Generally, the back door opening is located rearward of the rear wheel than the vehicle. Therefore, when analyzing and simulating the state of deformation of the back door opening affected by the road load applied from the front side of the vehicle (inside the vehicle compartment), among the closed cross sections formed by the outer panel and the inner panel, the inner panel It is confirmed that the load is concentrated on the convex surface (in particular, the R-shaped portion transitioning from the vertical direction to the horizontal direction), and the reinforcement of this portion is effective for preventing the deformation of the back door opening.

On the other hand, the lower portion of the back door opening receives an impact load from the rear of the vehicle, and its strength is enhanced from the viewpoint of improving the closeability of the back door. Therefore, a plurality of closed cross sections are formed in the lower part of the back door opening, and a reinforcing member that reinforces the closed cross section is often provided. However, when the closed cross section and the reinforcing member are configured as separate parts, there is a possibility that the load must be received at each part, and deformation of the back door opening may not be effectively prevented. .
Therefore, among conventional vehicles, there is a car body structure that secures a necessary rigidity against road load by forming a ridge line across the back door opening side and the upper side corner. (See, for example, Patent Document 1).

JP, 2012-91638, A

  However, in the above-described conventional vehicle body structure, since the ridgeline portion is not reinforced, there is a problem that the torsional deformation of the back door opening can not be prevented when the road load is concentrated.

  The present invention has been made in view of such a situation, and an object of the present invention is to receive a load that affects the deformation of the back door opening with reinforcement and bridge the load applied to the reinforcement. It is an object of the present invention to provide a back door opening structure of a vehicle capable of preventing torsional deformation of the back door opening by dispersing it over a wide area through the shape part.

  In order to solve the problems of the above-mentioned prior art, according to the present invention, a back door opening is formed by a vehicle body panel provided with an inner panel having a convex portion projecting toward the vehicle interior, and the convex formed in the inner panel In the back door opening structure of a vehicle in which the ridge line extends from the upper portion to the lower portion of the back door opening portion, the convex portion within the range of the curved portion where the ridge line shifts from the vehicle vertical direction to the vehicle width direction On the back side of the inner panel where the is located, extending along the ridgeline, and having a joint with the inner panel at a location straddling the ridgeline, and the curved portion from the reinforcement In the vertical direction of the ridgeline, a bridging shape portion is provided which is bridged to an outer panel constituting the vehicle body panel.

As described above, in the back door opening structure of the vehicle according to the present invention, the back door opening is formed by the vehicle body panel provided with the inner panel having the convex portion protruding toward the vehicle interior, and the back door opening is formed in the inner panel A convex ridge line extends from the upper portion to the lower portion of the back door opening, and the convex portion is located within the range of a curved portion where the ridge line shifts from the vehicle vertical direction to the vehicle width direction. On the back side, a reinforcement extending along the ridgeline and having a junction with the inner panel at a location straddling the ridgeline, and from the reinforcement in a direction perpendicular to the ridgeline of the curved portion There is provided a bridging shape portion which is disposed and hung over the outer panel constituting the vehicle body panel.
Therefore, according to the back door opening structure of the vehicle according to the present invention, while the reinforcement receives the load which affects the deformation of the back door opening and is concentrated on the ridge line portion of the inner panel, the load is applied to the reinforcement. The load can be dispersed over a wide area through the bridging portion, and torsional deformation of the back door opening can be effectively prevented.

FIG. 1 is a front view of a back door opening of a vehicle to which a structure according to an embodiment of the present invention is applied, as viewed from the vehicle front side in a vehicle compartment. It is a perspective view which expands and shows the inner panel of the Z section in FIG. 1, and its peripheral part. In FIG. 2, a part of inner panel is removed and it is a perspective view which shows the arrangement | positioning relationship of reinforcement and a spanning shape part. It is the sectional view on the AA line in FIG. FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 3, showing a portion of the inner panel removed to show the arrangement relationship between reinforcement and the bridging portion.

Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
1 to 5 show a back door opening structure of a vehicle according to an embodiment of the present invention. In the drawings, the arrow X direction indicates the vehicle vertical direction, and the arrow Y direction indicates the vehicle width direction.

The vehicle to which the back door opening structure according to the embodiment of the present invention is applied is a hatchback type automobile provided with a back door (not shown), and the vehicle rear is shown in FIGS. 1 to 3. As such, a back door opening 1 is provided which is opened and closed by a back door (not shown). The back door opening 1 includes a side body outer panel 2 provided outside the vehicle, an inner panel 3 provided inside the vehicle, a back door hinge reinforcement 4, a roof back member 5, a tail end member 6, etc. A portion is formed by a body panel joined by welding or the like.
Among such vehicle body panels, the inner panel 3 is located on the left and right sides of the back door opening 1, and is a quarter inner upper extension 31, a quarter inner upper panel 32, and a quarter inner lower panel disposed along the vehicle vertical direction. It has 33. Quarter inner upper extension 31 is disposed at upper curved portion 1 a located at the upper corner portion of back door opening 1, and quarter inner lower panel 33 is disposed at lower curved portion 1 b located at the lower corner portion of back door opening 1. It is done. Further, the back door hinge reinforcement 4 and the roof back member 5 are located at the upper part of the back door opening 1 and arranged along the vehicle width direction. Furthermore, the tail end member 6 is located below the back door opening 1 and is disposed along the vehicle width direction. On the other hand, a rear skirt panel (outer panel) 11 constituting a vehicle body panel is disposed outside the quarter inner lower panel 33 located in the lower curved portion 1 b of the back door opening 1.

  The inner panel 3 according to the present embodiment, as shown in FIGS. 1 to 5, has a convex portion 30 projecting to the vehicle interior side, and the convex portion 30 is an intermediate portion of the inner panel 3 in the vehicle width direction. By being bent to the side opposite to the side body outer panel 2, it is formed along the side of the back door opening 1 which is the longitudinal direction of the inner panel 3. Further, on the inner panel 3, convex ridges 30 </ b> A smoothly formed at positions corresponding to the tops of the convex portions 30 are continuously disposed while extending from the upper portion to the lower portion of the back door opening 1.

  Within the range of the lower curved portion 1b where the ridge line 30A of the inner panel 3 of the present embodiment is shifted in the vehicle width direction from the vehicle vertical direction, on the back side of the inner panel 3 (quarter inner lower panel 33) As shown in FIGS. 3 to 5, reinforcements 7 and bridging shape portions 8 are provided. The reinforcement 7 extends along the ridgeline 30A, has a predetermined length and width, and is entirely formed in a curved shape corresponding to the ridgeline 30A. The reinforcement 7 is a member for reinforcing the portion of the ridgeline 30A of the inner panel 3, and when a load load affecting the deformation of the back door opening 1 is concentrated on the portion of the ridgeline 30A of the inner panel 3. The reinforcement 7 is provided to receive the concentrated load.

As shown in FIGS. 3 to 5, the reinforcement 7 according to the present embodiment has joints 7a with the inner panel 3 at the left and right sides across the ridgeline 30A. The reinforcement 7 is fixed to the back surface of the inner panel 3 by joining the panel 3 by welding or the like. These joint portions 7 a are provided along the longitudinal direction on the left and right sides of the widthwise middle portion of the reinforcement 7 and are bent in a flange shape so as to be superimposed on the back surface of the inner panel 3. Moreover, the reinforcement 7 is provided so as to bridge between the curved portions of the ridgeline 30A, and is joined near the end of the curved portion of the ridgeline 30A, and linearly between the curved portions of the ridgeline 30A It is configured to support. Therefore, the reinforcement 7 has a width dimension that allows the entire of the reinforcement 7 to bridge between the curved portions of the ridgeline 30A, and has a width dimension that allows the joint 7a to be joined to the inner panel 3 .
The portion located behind the ridgeline 30A and where the reinforcement 7 is joined to the inner panel 3 is formed in a strong closed cross-sectional shape, and the closed cross-sectional shape corresponds to the convex portion 30 of the inner panel 3 and the phosphorus The widthwise middle portion of the force 7 has a substantially triangular shape.

Further, as shown in FIGS. 3 and 5, the bridging shape portion 8 of the present embodiment is disposed from the reinforcement 7 in the vertical direction of the ridgeline 30A of the lower curved portion 1b and spans the rear skirt panel 11 of the outer panel. It has a structure that The bridging portion 8 is provided to disperse the load on the inner panel 3 loaded on the reinforcement 7 to peripheral parts such as the rear skirt panel 11 and the like. Therefore, the bridging portion 8 extends in the vertical direction of the ridgeline 30A and has a bulk shape. The closed cross section 10 formed by the inner panel 3 and the rear skirt panel 11 is configured to be supported by the bridging portion 8.
That is, the bridging shape portion 8 is formed around the middle wall 8a and the middle wall 8a having a width dimension and shape capable of bridging between the inner panel 3 and the rear skirt panel 11, and the inner panel 3 and flanges 8 b and 8 c joined to the rear skirt panel 11. In addition, the flange 8b on the inner panel 3 side and the flange 8c on the rear skirt panel 11 are bent in opposite directions to each other, and the load received by the portion of the ridgeline 30A is spread over a wide area through the bridging portion 8. It is supposed to be distributed.

On the other hand, a junction 9 of the inner panel 3 (quarter inner lower panel 33) and the tail end member 6 is provided on the side of the longitudinal end of the reinforcement 7 as shown in FIG. 2 and FIG. There is. By providing such a junction point 9, the load applied to the ridge 30 A of the inner panel 3 is dispersed to the reinforcement 7, the bridging portion 8 and the tail end member 6.
The junctions 9 are disposed below the longitudinal end of the reinforcement 7, and in the present embodiment, are provided at two locations above and below the vehicle in the vertical direction (one or three or more locations. May be provided). The inner panel 3 and the rear skirt panel 11 are joined to a member connected to the tail end member 6 at the lower part of the back door opening 1. Therefore, the joint point 9 may be a joint by welding or a joint by fastening of a bolt and a nut, and the same effect can be obtained.

As described above, in the back door opening structure of the vehicle according to the embodiment of the present invention, the back door opening 1 is formed by the vehicle body panel provided with the inner panel 3 having the convex portion 30 projecting to the vehicle interior side. A convex ridge 30 </ b> A formed on the panel 3 extends from the top to the bottom of the back door opening 1. Moreover, of the curved portions 1a and 1b where the ridgeline 30A shifts in the vehicle width direction from the vehicle vertical direction, the ridgeline 30A is on the back surface side of the inner panel 3 where the convex portion 30 is located within the range of the lower curved portion 1b. Along the ridge line 30A, the reinforcement 7 having the joint 7a with the inner panel 3 and the reinforcement 7 disposed from the reinforcement 7 in the vertical direction of the ridge line 30A of the lower curved portion 1b A bridging shape portion 8 is provided which is bridged over the rear skirt panel 11 of the outer panel constituting the.
Therefore, in the back door opening structure of the present embodiment, while the reinforcement 7 receives a load that affects the deformation of the back door opening 1 and is concentrated on the ridge line 30A of the inner panel 3, the reinforcement 7 The load applied to the rear door can be dispersed over a wide area including the rear skirt panel 11 and the like through the bridging portion 8, and the twisting deformation of the back door opening 1 can be effectively prevented.

  Further, in the back door opening structure of the present embodiment, the bridging portion 8 extends in the vertical direction of the ridgeline 30A and has a bulk shape, and is formed by the inner panel 3 and the rear skirt panel 11 of the outer panel. Since the closed cross section 10 is configured to be supported by the bridging portion 8, the load received by the portion of the ridgeline 30A of the inner panel 3 can be efficiently dispersed to the rear skirt panel 11 Thus, the torsional rigidity of the lower curved portion 1b can be improved, and torsional deformation of the back door opening 1 can be prevented.

  Furthermore, in the back door opening structure according to the present embodiment, a junction point 9 between the inner panel 3 and the tail end member 6 located below the back door opening 1 at the side of the longitudinal end of the reinforcement 7. The load applied to the portion of the ridge line 30A of the inner panel 3 can be smoothly dispersed to the reinforcement 7, the bridging portion 8 and the tail end member 6 from the portion of the ridge line 30A. It is possible to carry out load dispersion to diffuse.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes are possible based on the technical idea of the present invention.

  For example, in the back door opening structure of the vehicle in the embodiment described above, the convex portion 30 is positioned within the range of the lower curved portion 1b where the ridge line 30A of the inner panel 3 shifts in the vehicle width direction from the vehicle vertical direction. The reinforcement 7 is provided along the ridgeline 30A on the back surface side of the inner panel 3, but within the range of the upper curved portion 1a where the ridgeline 30A of the inner panel 3 shifts from the vehicle vertical direction to the vehicle width direction Even if reinforcement 7 is provided along the ridgeline 30A on the back surface side of the inner panel 3 (quarter inner upper extension 31) where 30 is positioned, the same effect can be obtained. However, due to the construction of the body panel, the upper part of the back door opening 1 is required to have a complex shape and a sharp shape in terms of exterior design, and the interior of the vehicle interior needs to have a large indoor space. There is a demand to avoid the problem, and it has become a difficult place to arrange a large reinforcing member between the inner panel 3 and the vehicle body configuration panel such as the back door hinge reinforcement 4 or the like. Therefore, it is more preferable to apply the back door opening structure in the above-mentioned embodiment provided with the bridging portion 8 to the lower part of the back door opening 1.

DESCRIPTION OF SYMBOLS 1 back door opening part 1a upper curved part 1b lower curved part 2 side body outer panel 3 inner panel 4 back door hinge reinforcement 5 roof back member 6 tail end member 7 reinforcement 7a joint 8 bridging shape part 9 joint 10 closed cross section Part 11 rear skirt panel 30 convex part 30A ridgeline 31 quarter inner upper extension 32 quarter inner lower panel 33 quarter inner lower panel

Claims (3)

A back door opening is formed by a vehicle body panel provided with an inner panel having a convex portion projecting to the vehicle interior side, and a convex ridge formed on the inner panel extends from the top to the bottom of the back door opening. In the back door opening structure of the
The ridgeline extends along the ridgeline on the back surface side of the inner panel where the convex portion is located within the range of the curved portion where the ridgeline shifts in the vehicle width direction from the vertical direction of the vehicle, at a location straddling the ridgeline A reinforcement having a joint portion with the inner panel, and a bridging shape portion which is disposed from the reinforcement in the vertical direction of the ridge line of the curved portion and spans the outer panel constituting the vehicle body panel. Backdoor opening structure of a vehicle characterized by being.   The bridging shape portion extends in the vertical direction of the ridgeline and has a bulk shape, and a closed cross-sectional portion formed by the inner panel and the outer panel is supported by the bridging shape portion. The back door opening structure of a vehicle according to claim 1, characterized in that:   A junction point between the inner panel and a tail end member located below the back door opening is provided at a side of the longitudinal end of the reinforcement. The back door opening structure of the vehicle according to 2.

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