JP4022963B2 - Lower corner structure of the back door opening - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle with a frame, and more particularly to a lower corner structure in a large opening at the rear of a vehicle body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a corner portion between a rear member 2 of a rear floor 1 of a vehicle body and left and right opening portions (also referred to as side pillars) 8 in a large rear opening portion of a vehicle with a frame of this type, for example, having a structure shown in FIG. There is. The rear member 2 is formed so as to be connected to the rear floor 1, and the rear member 2 is formed in a substantially rectangular shape by an upper panel 3, an inner panel 4, and a lower panel 5 having a substantially L-shaped cross section. 6a and 6b are formed.
[0003]
The left and right opening portions 8 are formed on the rear side of the side panel 7 and connected to the rear member 2. The opening portion 8 is joined and formed by a quarter panel 9, an inner panel 10, and an opening reinforcement 11. A quarter reinforcement 12 is attached to the inside. Further, as shown in FIG. 7, the opening reinforcement 11 is integrally formed with a substantially L-shaped lower gazette 13 formed by bending a connection piece 13a for connection to the rear member 2 to form a side panel assembly. . Further, lower panel reinforcements 14 shown in FIGS. 8 and 9 are attached to the left and right of the rear member 2, and the floor 1 and the upper flange portion 6a of the rear member 2 are joined to form a floor assembly.
[0004]
As shown in FIGS. 8 and 9, the rear member 2 of the floor assembly thus formed has a lower panel reinforcement 14 attached to a body mount 15 having a relatively large receiving surface 16 provided on the frame side. And the side panel assembly is connected to the opening reinforcement 11 with the connecting piece 13a of the lower gusset 13 inserted between the lower panel 5 of the rear member 2 and the receiving surface 16 of the body mount 15. While being welded, it is attached to the body mount 15, and the required panels of the rear member 2 and the opening portion 8 are spot-welded to form a corner portion. Reference numeral 17 denotes an upper gusset.
[0005]
[Problems to be solved by the invention]
However, when joining the conventional rear member 2 and the opening portion 8, the connecting piece 13 a of the lower gusset 13 attached to the opening reinforcement 11 is inserted between the lower panel 5 of the rear member 2 and the receiving surface 16 of the body mount 15. Therefore, it is necessary to provide a gap t between the lower panel 5 and the receiving surface 16 of the body mount 15 for insertion. However, since the insertion process of the connecting piece 13a is the final process of assembling the vehicle body, it is necessary to increase the distance t in order to facilitate the assembly of the large parts of the floor assembly and the side body assembly. The gap t is preferably small because spot welding Wp is performed, and the interests are contradictory to each other. The insertion is difficult and requires man-hours, resulting in poor productivity. Further, as shown in FIG. When the point welding Wp is connected to the connecting piece 13a, a gap ta is interposed between them and the spot welding Wp part is depressed, which causes a crack to occur, and there is a problem affecting quality and strength.
[0006]
Further, as shown in FIG. 9, the connection piece 13a of the lower gazette 13, the lower panel 5 and the lower panel reinforcement 14 are put together in the same section and spot welded to a relatively large receiving surface 16 of the body mount 15. For this reason, the strength and rigidity are ensured only by the thickness of the plate mount for the input load to the receiving surface 16 of the body mount 15, so that the thickness of the plate mount increases and it is difficult to ensure the strength of the body mount 15. For this reason, if the body mount 15 is made small in order to prevent the receiving surface 16 of the body mount 15 from becoming large, there is a problem that it becomes difficult to obtain mount characteristics, which is disadvantageous in terms of strength and vibration characteristics.
[0007]
The present invention has been made to solve the above conventional problems,
First, a configuration in which the joining by the joining piece of the rear member and the opening portion is abolished and the opening portions attached to the left and right of the rear member are joined and joined together to form a vertical wall portion over a predetermined range in the shear direction. As a result, the assembly accuracy is good, the strength and rigidity are high, and the productivity can be improved.
The second is to provide a lower corner structure of the back door opening that can distribute and share the input load of the body mount that supports the corner of the rear member to the vertical wall.
[0008]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention
According to the first aspect of the present invention, the corner portions formed on the left and right sides of the lower part of the back door opening of the vehicle include a rear member formed on the rear side of the rear floor and an opening portion formed on the rear side of the left and right side panels. The left and right ends of the lower inner panel and the lower outer panel of the rear member are respectively provided with side surface mounting edges, and the rear members of the rear member rise from the front and rear edges of the bottom plate in the left and right ends. A lower panel reinforcement having front and rear side plates joined to the panel and the lower outer panel and having a connecting piece at the end of the rear side plate is attached to the lower surface of the rear member on the lower side of the lower panel reinforcement. A floor panel that has a receiving panel that is in contact with it, a connection piece that hangs downward from the end of the panel, and edge pieces formed on both edges. An opening is attached, and the opening part is formed by joining a quarter panel, an inner panel, and an opening reinforcement. In order to attach this opening part, the left and right sides of the rear member and the rear member are attached to the left and right sides of the rear member. The rear floor side panel is spot welded via the connection piece of the floor end reinforcement, and the lower panel reinforcement connection piece is spot welded to the rear side mounting edge to provide a triple structure first in the shear direction. A vertical wall portion is formed, and on this rear floor side panel, one joining edge on the lower end side of the opening reinforcement of the opening portion is superposed on the rear floor side panel and is spot-welded in the predetermined height range, The lower side is the front side mounting edge and the floor end of the rear member. Reinforcement and in point welding, the same lower side is to have a configuration which forms a second vertical wall portion of the triple structure at a predetermined length in the shear direction,
In the invention of claim 2, the bottom plate of the lower panel reinforcement mounted in the left and right ends of the rear member is formed narrower than the lower panel of the rear member, and the side plate on the front side forms the second side wall portion. The floor end reinforcement's receiving panel and connection piece, which are spot welded in the shear direction at a predetermined angle to the upper side of the rising panel with the part mounting edge, are almost the same width as the lower panel of the rear member. It is formed and is configured to integrally attach and support the bottom plate, the lower panel, and the receiving panel with a body mount,
In the invention according to claim 3, the rear member joins the lower inner panel and the lower outer panel having a substantially L-shaped cross section to the lower surface side of the rear side extending portion of the rear floor, and forms a joining flange portion on the upper and lower sides of the rear side. It is the lower corner structure of the back door opening part made into the structure.
[0009]
【The invention's effect】
According to the first aspect of the present invention, the opening portion is attached to the end portion of the rear member in such a manner that the rear floor side panel is interposed and joined from the left and right sides. Since the wall is joined and formed in the shear direction, the load at the lower corner, that is, the push-up load from the bottom of the input load of the body mount, is shared by both vertical walls via the floor end reinforcement. This is extremely advantageous in terms of joint strength and rigidity between the rear member and the opening. In addition, a floor end reinforcement that is a receiving part of the receiving surface of the body mount is provided in the rear member molding process instead of the conventional plug-in configuration, so that the number of steps can be reduced and the productivity can be improved. In addition, accuracy can be easily ensured.
According to the second aspect of the present invention, the lower panel reinforcement mounted on the left and right end portions of the rear member has side plates that rise in an open shape above both edges of the bottom plate that is narrower than the width of the lower panel of the rear member. This one side plate is joined to the rising panel that forms the second vertical wall in a shearing manner at a predetermined angle in the shear direction, thereby distributing the large input from the body mount to the lower panel and the rising panel Can be measured.
In addition, with this configuration, the width of the floor end reinforcement in the front-rear direction can be widened, thereby making it possible to increase the diameter of the body mount, which is advantageous in terms of strength and vibration characteristics. It can be a mount. In addition, by increasing the body mount, it is possible to increase the washer of the mounting bolt, thereby increasing the shared surface against the tensile load on the body side, and also close to the side panel of the lower panel reinforcement Thus, the strength is extremely advantageous.
According to the third aspect of the present invention, the rear member joins the lower inner panel and the lower outer panel having a substantially L-shaped cross section to the lower surface side of the rear side extension portion of the rear floor, and forms the joining flange portions on the upper and lower sides of the rear side. For example, even if an external force is applied to the anchor part of the safety belt attached to the rear floor, the seat, etc., the rear floor is joined to the upper flange part of the conventional rear member. Since the joining flange portion is positioned on the rear side of the body mount, it can sufficiently resist the peeling load acting on the joining flange portion.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the invention will be described with reference to the drawings. FIG. 1 is a perspective view of a corner portion 21 between a rear member 23 and a right opening portion 36 of a rear floor 22 of a large rear opening of a vehicle body, and FIG. FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. 1, and FIG. 4 is a schematic cross-sectional view taken along line BB of FIG. 1. 5 shows a substantially horizontal cross-sectional view of the corner portion 21, and the lower corner portion 21 of the large opening portion is constituted by a rear member 23 formed at the rear portion of the rear floor 22 and left and right opening portions 36.
[0011]
As shown in FIG. 1, the rear member 23 has a lower inner panel 24, a lower outer panel 25, and a rear floor 22 each having a substantially L-shaped cross section formed by a horizontal lower panel 24A and a rising panel 24B. The extended portion 22a on the side constitutes a part of the rear member 23, and the upper mounting edge 24a of the rising panel 24B of the lower inner panel 24 is fixed to the lower surface of the rear floor 22 by welding means, and the lower portion of the lower panel 24A The mounting edge 24b is fastened to the lower end side of the lower outer panel 25 by welding means to form a joining flange portion 26a. The upper mounting edge 25a of the lower outer panel 25 is the edge of the extending portion 22a on the rear side of the rear floor 22 The rear flange 23 is connected to the rear portion of the rear floor 22 by forming a joint flange portion 26b. It is integrally formed in a substantially rectangular shape. Further, the left and right ends of the lower inner panel 24 and the lower outer panel 25 are bent to the front side as shown in FIG. 5 to form side attachment edges 24c and 25b, and the horizontal lower portion of the lower inner panel 24 is formed. A mounting hole 27 of the body mount 43 is provided at a predetermined position near the end of the panel 24A.
[0012]
A lower panel reinforcement 28 shown in FIG. 2 is attached to the left and right ends of the rear member 23 formed in this way. The lower panel reinforcement 28 includes a bottom plate 29 having a substantially rectangular shape that is narrower than the width of the lower panel 24A of the lower inner panel 24 of the rear member 23, and an end plate 30 as shown in FIG. As shown in FIG. 2, the side plates 31 and 32 are vertically erected upward, and at a predetermined position of the bottom plate 29 are holes that align with the mounting holes 27 penetrating the lower panel 24A of the lower inner panel 24. The bottom plate 29 is spot welded to the lower panel 24A, and the upper mounting edges 31a and 32a of the side plates 31 and 32 are spot welded to the rising panel 24B and the lower outer panel 25 of the lower inner panel 24. In particular, the side plate 31 is inclined in a protruding manner at a predetermined angle with respect to the rising panel 24B, and the mounting edge 31a is joined in the shear direction (see FIG. 4). The attachment edge 30a of the end face plate 30 is fixed to the lower surface of the extending portion 22a of the rear floor 22 with a structural adhesive. Further, a connection piece 33 is formed at the end of the side plate 32 by being bent to the front side. Further, as shown in FIGS. 1 and 3, a floor end reinforcement 34 is spot-welded to the lower surface side of the lower panel 24A to which the lower panel reinforcement 28 is attached. The floor end reinforcement 34 is connected to the lower panel 24A. The receiving panel 34a having a predetermined width and the opening 36 side of the receiving panel 34a are bent downward at a predetermined length to form a connecting piece 34b. The receiving panel 34a and the connecting piece 34b are provided on both sides of the receiving panel 34a. Edge pieces 34 c and 34 d are formed, and the edge piece 34 d side is spot welded to a connection flange portion 26 a on the lower side of the rear member 23.
[0013]
The left and right opening portions 36 are formed on the rear side of the side panel 35 and are connected to the rear member 23. The opening portion 36 is joined and formed by a quarter panel 37, an inner panel 38, and an opening reinforcement 39. A quarter reinforcement 40 is attached to the inside of the quarter panel 37.
[0014]
As shown in FIGS. 3 and 4, the rear member 23 formed integrally with the rear floor 22 formed as described above has a floor end reinline attached to a body mount 43 having a receiving surface 44 attached to the frame side. The hosement 34 side is attached, and the left and right sides of the rear floor 22 and the rear member 23 are rear floor side panels 41 as shown in FIG. 5, as shown in FIG. 5, the side mounting edges 24 c of the lower inner panel 24 and the side mounting edges of the lower outer panel 25. 25b and the connecting piece 34b of the floor end reinforcement 34 are spot welded. Further, the connecting piece 33 of the lower panel reinforcement 28 is spot welded to the side mounting edge 25b portion, and the rear floor side panel 41 rear The end has a triple structure in the shear direction and has a predetermined length (the length of the connecting piece 33). Wall W1 is formed.
[0015]
The lower end portion of the opening portion 36 is attached to the left and right sides of the rear member 23 portion of the rear floor side panel 41 attached in this way. When the opening portion 36 is attached, one joining edge 39a on the lower end side of the opening reinforcement 39 is overlapped with the rear floor side panel 41 as shown in FIG. The lower side of this point welding range is spot welded corresponding to the side mounting edge 24c of the lower inner panel 24 and the floor end reinforcement 34, and the lower side is a share. A triple vertical second wall W2 is formed in the direction at a predetermined height (the length of the side attachment edge 24c and the connecting piece 34b). Further, the lower end edge of the opening reinforcement 39 is spot welded to the connection piece 34 b of the floor end reinforcement 34.
[0016]
The lower other end edge 37a of the quartz panel 37 joined to the other joining edge 39b of the opening reinforcement 39 is spot welded to the lower outer panel 25 side of the rear member 23. Further, a curved upper gazette 42 is spot welded between the inner panel 38 and the extended portion 22a of the rear floor 22 constituting the upper panel of the rear member 23, and lower corner portions 21 are formed on the left and right sides of the back door opening. Has been. Reference numeral 45 denotes a spot working hole.
[0017]
As described above, the lower corner portions 21 formed on the left and right sides of the opening of the back door are composed of the rear member 23 formed on the rear side of the rear floor 22 and the opening portions 36 attached to the left and right of the rear member 23. The rear member 23 is formed in a substantially rectangular cross section by a lower inner panel 24, a lower outer panel 25, and an extending portion 22a of the rear floor 22, and both ends of the panels 24 and 25 are side portions bent to the front side. Mounting edges 24c and 25b are formed, and side plates 30 and 31 are provided on the left and right sides of the rear member 23. The side plates 30 and 31 rise from the both edges of the bottom plate 29 narrower than the width of the lower panel 24A of the rear member 23. The lower panel reinforcement 28 is attached, and at the end of the rear side plate 32, the connecting piece 3 is bent to the front side. The lower panel 24A is provided with a lower panel reinforcement 28 attached to the lower panel 24A, and a receiving panel 34a along the lower panel 24A, a connecting piece 34b bent downward from the same end, and left and right A floor end reinforcement 34 composed of edge pieces 34c and 34d is attached to form a rear member 23.
[0018]
The opening portion 36 has a quarter panel 37, an inner panel 38 and an opening reinforcement 39 joined to the rear side of the side panel 35, and a quarter reinforcement 40 is attached to the back of the quarter panel 37. A rear floor side panel 41 is spot welded to the left and right sides of the rear floor 22 and the rear member 23 via side attachment edges 24c and 25b of the rear member 23 and connection pieces 34b of the floor end reinforcement 34, and side portions. A connecting piece 33 of the lower panel reinforcement 28 is spot-welded to the mounting edge 25b to form a first vertical wall W1 having a triple structure in the shear direction. The opening of the opening 36 is formed on the rear floor side panel 41. One joint edge 39a on the lower end side of the reinforcement 39 is superposed on the rear floor side panel 41 and is spot-welded in a predetermined height h range, and the lower side is a side mounting edge of the lower inner panel 24. 24c and floor end reinforcement 34 corresponding to the point welded, The second vertical wall portion W2 of the triple structure at a predetermined length is formed in E A direction.
[0019]
As described above, the opening portion 36 is attached to the end of the rear member 23 by joining the left and right sides of the rear floor side panel 41. In this joining, the first and second vertical wall portions W1 and W2 are front and rear. Since W2 is formed by joining in the shear direction, the load at the lower corner portion 21, that is, the push-up load from the lower side of the input load of the body mount 43 is applied to both vertical wall portions via the floor end reinforcement 34. W1 and W2 can be shared, which is extremely advantageous in terms of joint strength and rigidity between the rear member 23 and the opening portion 36. Further, since the floor end reinforcement 34 which is a receiving portion of the receiving surface 44 of the body mount 43 is provided in the molding process of the rear member 23 instead of the insertion structure as in the prior art, man-hours can be reduced and productivity can be reduced. The accuracy can be improved, and the accuracy can be easily ensured.
[0020]
Further, as shown in FIG. 4, the lower panel reinforcement 28 attached to the left and right end sides of the rear member 23 expands upward from both edges of the bottom plate 29 narrower than the width of the lower panel 24A of the rear member 23. Side plates 31 and 32 are formed, and the one side plate 31 is joined to the rising panel 24B formed with the second vertical wall W2 in a shearing manner at a predetermined angle in the shear direction. Can be distributed to the lower panel 24A and the rising panel 24B.
Further, with this configuration, the width in the front-rear direction of the floor end reinforcement 34 can be widened, thereby making it possible to increase the diameter of the body mount 43, which is advantageous in terms of strength and vibration characteristics. The body mount 43 can be made. In addition, by increasing the body mount 43, the washer 46a of the mounting bolt 46 can be increased, so that the sharing surface can be increased against the tensile load on the body side, and the lower panel reinforcement 28 side can be increased. It is close to the face plates 31 and 32 and is extremely advantageous in terms of strength.
[0021]
Further, the rear member 23 is formed by joining a lower inner panel 24 and a lower outer panel 25 having a substantially L-shaped cross section to the lower surface side of the rear side extending portion 22a of the rear floor 22, and joining flange portions 26a and 26b vertically on the rear side. For example, even if an external force is applied to an anchor portion, a seat or the like of a safety belt attached to the rear floor 22, the rear floor 1 is different from the conventional structure in which the upper floor portion 6 a of the rear member 2 is joined. In particular, since the lower joint flange portion 26a is located on the rear side of the body mount 43, it can sufficiently resist the peeling load acting on the joint flange portion 26a.
[0022]
In addition, in the said embodiment, although illustrated as a vehicle with a frame, the joining structure of an opening part is applicable also to a general vehicle. Further, the load receiving surface structure of the rear member, the lower panel reinforcement, and the floor end reinforcement is effective as a load receiving surface structure of a general vehicle body.
[Brief description of the drawings]
FIG. 1 is a perspective view of a lower corner portion of a large rear opening of a vehicle body.
FIG. 2 is a perspective view of a lower panel reinforcement attached to left and right ends of a rear member.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
4 is a cross-sectional view taken along line BB in FIG. 1. FIG.
FIG. 5 is a schematic horizontal cross-sectional view of a corner portion.
FIG. 6 is a perspective view of a lower corner portion of a large rear opening of a conventional vehicle body.
FIG. 7 is a perspective view of a conventional opening reinforcement and a lower gazette joined together.
8 is a cross-sectional view taken along line AA in FIG.
9 is a cross-sectional view taken along line BB in FIG.
FIG. 10 is a cross-sectional view of a spot weld portion of a connecting piece between a lower panel and a lower gazette.
[Explanation of symbols]
21 Lower corner portion 22 Rear floor 22a Rear floor extension portion 23 Rear member 24 Lower inner panel 24A Lower panel 24B Rising panel 24c, 25b Side mounting edge 25 Lower outer panel 28 Lower panel reinforcement 29 Bottom plate 31, 32 Side plate 33 Connection piece 34 Floor end reinforcement 35 Side panel 36 Opening part 37 Quarter panel 38 Inner panel 39 Opening reinforcement 39a, 39b Joining edge 40 Quarter reinforcement 41 Rear floor side panel 43 Body mount 44 Receiving surface W1 First vertical wall W2 First 2 vertical wall

Claims (3)

The corner portions formed on the left and right sides of the lower portion of the vehicle back door opening are composed of a rear member formed on the rear side of the rear floor and an opening portion formed on the rear side of the left and right side panels.
Side mounting edges are formed at the left and right ends of the rear member's lower inner panel and lower outer panel, respectively, and the rear member's lower inner panel and the lower member's lower inner panel A lower panel reinforcement having front and rear side plates to be joined to the lower outer panel is attached to the end of the rear side plate, and a lower panel reinforcement is attached to the lower side of the lower panel reinforcement. A receiving panel, a connecting piece that hangs downward from the end of the panel, and a floor end reinforcement that has edge pieces formed on both edges thereof are attached,
The opening part consists of a quarter panel, an inner panel, and an opening reinforcement.
To install this opening, the rear floor side panel is spot welded to the left and right sides of the rear floor and the rear member via the front and rear side mounting edges of the rear member and the floor end reinforcement connection piece, and the rear side mounting edges The lower panel reinforcement elements are spot welded to form a first vertical wall with a triple structure in the shear direction. The lower floor side of the opening reinforcement of the opening is against this rear floor side panel. One joint edge is superposed on the rear floor side panel and spot-welded in the predetermined height range, and the lower side is spot-welded to the side part mounting edge and floor end reinforcement of the rear member. A back door opening configured to form a triple vertical second wall portion with a predetermined length in the shear direction on the lower side The lower corner structure. The bottom plate of the lower panel reinforcement mounted in the left and right ends of the rear member is formed narrower than the lower panel of the rear member, and the front side plate has a side mounting edge that forms a second side wall. The floor end reinforcement receiving panel and connection piece are spot welded in the shear direction at a predetermined angle to the upper side of the floor, and the bottom end plate and the lower part are formed with the same width as the lower panel of the rear member. The lower corner structure of the back door opening according to claim 1, wherein the panel and the receiving panel are integrally mounted and supported by a body mount. The rear member has a configuration in which a lower inner panel and a lower outer panel having a substantially L-shaped cross section are joined to a lower surface side of a rear side extending portion of a rear floor to form a joining flange portion on the upper and lower sides of the rear side. Lower corner structure of the back door opening.

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