JP5437682B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure in which a cabin part of a vehicle body and a vehicle body structure positioned in front of the cabin part are made of different metals.

  Vehicle body structures include those made of steel and those made of aluminum alloys. A steel vehicle body can partially repair a damaged part at the time of repair after a collision, but there is a problem that the weight becomes heavy, which becomes a bottleneck in reducing the weight of the vehicle. Aluminum alloy bodies are lighter than steel bodies, but it is difficult to partially repair damaged parts during repairs after a collision, and a factory equipped with specialized skills and equipment Otherwise, it cannot be repaired, and repair costs increase. Considering the weight balance of the vehicle, a vehicle body structure in which the cabin portion is made of steel and the front structure constituting the front portion of the vehicle is made of an aluminum alloy has already been put into practical use. When joining such dissimilar metals, they are often fastened by rivets rather than by welding. For example, Patent Document 1 is cited as an example of a structure in which the front structure of the vehicle body is detachable.

JP-A-5-85407

  Even in the vehicle body structure in which the cabin part and the front part structure are made of different metals as described above, specialized techniques were acquired when replacing the front part structure with a new one at the time of repair after a collision. Since it can only be repaired by a factory equipped with things and equipment, the repair cost increases. When riveting the cabin and front structure of dissimilar metals, a dedicated tool is used to locate the connection between the cabin and the front structure, so the repair work is complicated and requires time. End up.

  In addition, since the vehicle design is changed according to the vehicle type, the vehicle body structure is exclusively designed according to the vehicle type, and is therefore often assembled on a dedicated production line for each vehicle type. For this reason, the joints between the cabin and the front / rear structure are designed exclusively for each vehicle type.For the same vehicle type, the vehicle performance can be changed by changing the vehicle performance and design according to the vehicle grade. Even if it tries to increase, it will be difficult to increase the number of vehicle variations at low cost easily because the parts structure and the structure of the joint will become the bottleneck and manufacturing will be performed on a dedicated line.

  Patent Document 1 describes a configuration in which the front structure is detachable on the cabin side, so that the cabin side can be shared to provide a vehicle with a different front design. Since the side member and suspension support member that are to be welded to the cabin side, the suspension mounting position and vehicle rigidity cannot be changed by exchanging the front structure. In addition, it is difficult to reduce the weight of the vehicle. Even when the cabin and the front structure are made of dissimilar metals, the present invention can perform the work for repairing the vehicle body damage quickly and at low cost, and can change the suspension by changing the front structure. It is an object of the present invention to provide a vehicle body structure that can reduce the weight of the vehicle by changing the mounting position of the vehicle and the vehicle rigidity, and that can be applied to vehicles having different running performance.

In order to set the above object, the invention of claim 1 has a cabin part of a vehicle body and a front structure located in front of the vehicle with respect to the cabin part, and the cabin part and the front structure are made of different metals . in the vehicle body structure that is, the front structure, each side member located in the vehicle width direction, and a plurality of frame members which are constituted by a suspension support member for attaching the suspension respectively than the side member located above, A first joint part interposed between the cabin part and each skeleton member and joined to the cabin part; and a second joint part located in the vehicle width direction and detachably joined to each skeleton member. An interface bracket that removably supports the front structure with respect to the cabin portion by welding the cabin portion and the first joint portion and fastening the skeleton member and the second joint portion. that it has Vehicle body structure and butterflies.
According to a second aspect of the present invention, the second joint and the skeleton member have joint surfaces that are joined to each other, and the shape of each joint surface extends in the vehicle front-rear direction intersecting the vehicle vertical direction. And a second surface and a third surface that are respectively positioned on both ends of the first surface and extend in the vehicle vertical direction, and the first to third surfaces are joined to each other and joined by a fastening member. It is characterized by.

According to the present invention, a plurality of front structure constituting the front portion of the vehicle body, constituted by a suspension support member for attaching the suspension respectively than the side member and the side member located in the vehicle width direction is positioned above It has a skeletal member, since this was removably coupled to the frame member and the cabin unit, even if the the cabin unit and the front structure is composed of different metals, the work at the time of vehicle damage repair quickly Can be repaired at low cost. Further, by changing the front structure, the suspension mounting position and vehicle rigidity can be changed, so that the weight of the vehicle can be reduced and it is possible to deal with vehicles having different running performance.
According to the present invention, the first joint that is interposed between the cabin portion and the skeleton member and is joined to the cabin portion, and the second joint that is positioned in the vehicle width direction and is detachably joined to the skeleton member. And an interface bracket that forms a part of the skeleton member by coupling the first joint portion and the second joint portion to the cabin portion and the skeleton member, respectively. Even if the cabin part and the front structure are made of different materials, the skeleton member has a different design by changing the second joint part corresponding to the skeleton member while maintaining the shape of the joint part. The front structure can be coupled to the cabin through an interface bracket. For this reason, while being able to share a cabin part, since different vehicle types can be manufactured without changing a manufacturing line significantly, the variation of a vehicle can be increased at low cost.
According to the present invention, the first side of the interface bracket is welded to the cabin, and the second side of the interface bracket is fastened to the skeleton member. It becomes easy to replace the skeleton member with respect to the part, and the work at the time of repairing the vehicle body damage can be repaired quickly and at low cost, and the variation of the vehicle can be increased.
According to the present invention, the second joint portion and the skeleton member have joint surfaces facing each other, and the shape of each joint surface extends in the vehicle front-rear direction intersecting the vehicle vertical direction; The first and second surfaces are respectively formed on the both ends of the first surface and extend in the vehicle vertical direction. The surfaces are joined to each other and joined together by a fastening member. By receiving the input load, the input load on the fastening member that fastens the second and third surfaces is reduced. For this reason, the number of fastening points at the joint between the second joint and the skeleton member is reduced, the work time on the production line and the work time at the time of repair are shortened, the number of parts is reduced, and the weight can be reduced. Can be repaired at the same time and the number of vehicle variations can be increased.

1 is a perspective view showing a schematic configuration of a vehicle body structure that is an embodiment of the present invention. It is an expansion perspective view which shows independently the composition of the frame member with which a front part structure is provided. It is a perspective view when the skeleton member shown in FIG. 2 is seen from the vehicle outer side. It is an enlarged view which shows the structure of the coupling | bond part of a cabin part, an interface bracket, and a skeleton member. It is an enlarged view of the coupling | bond part of an interface bracket and a skeleton member. It is an enlarged view which shows the structural example of the coupling | bond part of an interface bracket and a skeleton member. It is an expanded sectional view which shows the seal structure of the coupling | bond part of an interface bracket and a skeleton member. (A) is an enlarged view which shows an example of the seal structure of an interface bracket and a skeleton member coupling | bond part, (b) is AA sectional drawing of (a). (A) is an enlarged view which shows an example of the seal structure of an interface bracket and a skeleton member coupling | bond part, (b) is BB sectional drawing.

  Hereinafter, embodiments of the vehicle body structure of the present invention will be described with reference to the drawings. In FIG. 1, a vehicle body 1 includes a cabin part 2, a front structure 3 positioned in front of the vehicle with respect to the cabin part 2, and a cabin part 2 interposed between the cabin part 2 and the front structure 3. An interface bracket 5 for detachably connecting the front structure 3 is provided. In this embodiment, the cabin portion 2 is made of steel, and the front structure 3 is made of an aluminum alloy that is a different material from the cabin portion 2.

  The front structure 3 is positioned in front of the vehicle with respect to the skeleton members 7 and 8 positioned in the vehicle width direction W and the skeleton members 7 and 8, and both ends of the upper member 34A and the lower member 34B are respectively connected to the skeleton members 7 and 8. A combined front member 34 and a bumper mounting beam 35 connected to the front member 34 are provided. In this embodiment, the skeleton members 7 and 8 are made of a die-cast material, the front member 34 is made of a press material, and the bumper mounting beam 35 is made of an extruded material.

  The skeleton member 7 is formed by integrally molding a spring house panel 30 serving as a suspension support member for supporting a right funnel suspension (not shown) and a side member 32 positioned below the spring house panel 30. The skeleton member 8 is formed by integrally molding a spring house panel 31 serving as a suspension support member for supporting a left funnel suspension (not shown) and a side member 33 positioned below the spring house panel 31. The structure of the skeleton members 7 and 8 may not be one in which the spring house panels 30 and 31 and the side members 32 and 33 are integrally molded.

  As shown in FIGS. 2, 3, and 4, suspension attachment portions 9A and 9B are formed on the upper surfaces 7A and 8A of the skeleton members 7 and 8 corresponding to the spring house panels 30 and 31, respectively. Further, attachment portions 36A and 36B of the front member 34 are formed on the vehicle front side, and joint portions 37 and 38 with the interface bracket 5 are formed on the vehicle rear side of the suspension attachment portions 9A and 9B. A plurality of ribs are formed on the skeleton members 7 and 8, and the strength thereof is ensured.

  As shown in FIG. 1, the interface bracket 5 is interposed between the front part 2 </ b> A of the cabin part 2 and the front part structure 3 without changing the cabin part 2 and the design and structure around the front of the vehicle. In addition, the work at the time of repairing vehicle damage can be repaired quickly and at low cost. The impression of the vehicle looks different by changing the design around the front, so even if the same model, even when developing different variations, the cabin part 2 can be shared, without significantly changing the production line Can be manufactured. For this reason, it is not necessary to provide a new line for developing variations, leading to a reduction in production cost. From another perspective, it leads to efficient use of the current production line. In addition, the fact that the cabin part 2 can be shared enables the development of new vehicle variations while ensuring comfort, so that the development cost can be reduced by designing the production line and shortening the design time of the vehicle body 1. Ultimately, the cost of the vehicle can be reduced.

  As shown in FIG. 1, the interface bracket 5 extends in the vehicle width direction W and is joined to the cabin portion 2, and the interface bracket 5 is positioned in the vehicle width direction W, and the skeleton member 7 shown in FIG. 8 joint portions 37 and 38 and second joint portions 52 and 53 detachably coupled to each other.

  The first joint 51 has a U-shaped cross section, and is continuous with the base 51A and the base 51A joined to the front of the dash panel 2C constituting the front 2A of the cabin 2 in FIG. Side panels 51B and 51C are formed to bend toward both side surfaces 2C1 and 2C2 of panel 2C, and are joined to both side surfaces 2C1 and 2C2 located below front pillars 11A and 11B (see FIG. 1). In this embodiment, the interface bracket 5 is joined by welding the base portion 51A and the side portions 51B and 51C to the dash panel 2C and the side surfaces 2C1 and 2C2, respectively, so that the side portions 51B and 51C are the same as the dash panel 2C. The base 51A is made of an aluminum alloy material for weight reduction.

  The second joint portions 52 and 53 extend downward from the base portion 51A and are fastened to the joint portions 37 and 38 (see FIG. 1) of the left and right skeleton members 7 and 8, respectively. For this reason, the second joint portions 52 and 53 and the joint portions 37 and 38 are formed with joint surfaces 52A and 53A and joint surfaces 37A and 38A, respectively, so as to face each other. Attachment holes 54 and 55 serving as attachment parts are formed at the edges of the joining surfaces 52A and 53A. As shown in FIG. 5, mounting holes 56 and 57 serving as mounting portions are formed at the edges of the joining surfaces 37A and 38A so as to face the mounting holes 54 and 55, respectively. Bolts 59 serving as fastening members are respectively inserted into the mounting holes of the joint surfaces 52A, 53A and the joint surfaces 37A, 38A from the joint surfaces 37A, 38A side, and are attached to the nuts 60 arranged on the joint surfaces 52A, 53A side. By fastening, the joining surfaces 52A and 53A and the joining surfaces 37A and 38A are fastened. That is, the interface bracket 5 is connected to the dash panel 2 </ b> C constituting the front portion 2 </ b> A of the cabin portion 2 by welding the first joint portion 51 and is joined to the joint portions 37 and 38 of the skeleton members 7 and 8. A part of the skeleton members 7 and 8 is configured by fastening the joint portions 52 and 53.

  According to such a vehicle body structure, the front structure 3 includes the side members 32 and 33 positioned in the vehicle width direction W and the suspension mounting portions 7A and 8A positioned above the side members 32 and 33. Since the skeleton members 7 and 8 are constituted by the spring house panels 30 and 31 and the skeleton members 7 and 8 and the cabin part 2 are detachably coupled, the cabin part 2 and the front structure 3 are Even when it is made of dissimilar metals, repair work for vehicle damage can be repaired quickly and at low cost, and by changing the front structure 3, the suspension mounting position and vehicle rigidity can be changed. Therefore, it is possible to deal with vehicles having different running performance.

  Between the cabin part 2 and the skeleton members 7 and 8, the 1st junction part 51 joined to the cabin part 2, and the 2nd junction part which is located in a vehicle width direction and is detachably joined to each skeleton member The first bracket 51 and the cabin portion 2 of the interface bracket 5 are welded and fastened together with the interface bracket 5 having 52 and 53, and the second bracket 52 and 53 of the interface bracket 5 and the skeleton The front of the vehicle body 1 is configured by fastening and coupling the members 7 and 8 with the bottle 59 and the nut 60 (see FIG. 5).

  The shape of the first joint portion 51 of the interface bracket 5 is changed by changing the second joint portions 52 and 53 in correspondence with the skeleton members 7 and 8 while maintaining the conventional shape. , 8 can be coupled to the cabin part 2 via the interface bracket 5. For this reason, even if the front structure 3 is different, it is possible to share the cabin 2 by connecting with the cabin 2 via the interface bracket 5 and manufacture different vehicle types without significantly changing the production line. Thus, the number of vehicle variations can be increased at a low cost.

  In the interface bracket 5, the first joint 51 is welded to the cabin 2 and the second joints 52 and 53 are fastened to the skeleton members 7 and 8, respectively. However, it becomes easy to replace the skeleton members 7 and 8 with respect to the cabin portion 2, and the work at the time of repairing the vehicle body damage can be repaired quickly and at low cost, and variations of the vehicle can be increased. In addition, since the second joint portions 52 and 53 and the skeleton members 7 and 8 are fastened by the bolts 59 and the nuts 60, the skeleton members 7 and 8 can be easily replaced even during repair and the workability is improved. .

  In the above embodiment, the joint portions 37 and 38 of the skeleton members 7 and 8 and the second joint portions 52 and 53 of the interface bracket 5 are tightened by bolts 59 and nuts 60 as shown in FIG. It is concluded. For this reason, in particular, the joint surface 52A, 53A and the joint surfaces 37A, 38A extending in the vehicle up-down direction Z, which is the external input direction with the suspension attached, are tightened with the joint surface for input in the bolt shear direction. Since it bears with the fastening force, that is, the frictional force of the coupling surface 61 where both the joint surfaces are combined, the number of fastening points tends to increase.

  However, as shown in FIG. 6, the shapes of the joint surfaces 52A and 53A and the joint surfaces 37A and 38A that face each other are the first surfaces 52A1 and 53A1 that extend in the vehicle longitudinal direction Y that intersects the vehicle vertical direction Z. The first surfaces 37A1, 38A1, the second surfaces 52A2, 53A2, the second surfaces 37A2, 38A2, and the third surfaces positioned in both ends of the first surface, that is, in the vehicle longitudinal direction and extending in the vehicle vertical direction Z, respectively. Are formed in a crank shape having respective surfaces 52A3, 53A3 and third surfaces 37A3, 38A3, the surfaces are joined to each other, and the first to third surfaces are fastened by bolts 59 and nuts 60, respectively. You may make it combine.

  With such a configuration, since the input load is received by the first surfaces 52A1 and 53A1 and the first surface surfaces 37A1 and 38A1, the input to the bolt 59 and the nut 60 that fastens the second and third surfaces. The load is reduced. For this reason, the fastening location in the joint portions 37 and 38 between the second joint portions 52 and 53 and the skeleton members 7 and 8 is reduced, the work time in the production line and the work time at the time of repair are shortened, and the number of parts is reduced. It is possible to reduce the weight and increase the number of vehicle variations at a lower cost.

  As described above, when the second joint portions 52 and 53 of the interface bracket 5 of the skeleton members 7 and 8 of the front structure 3 that are different members are joined together, the joint surface 37A is used as a measure against electrolytic corrosion. , 38A and the joining surfaces 52A, 53A are preferably provided with a sealing material to prevent water from entering. As a sealing material intervening method, a liquid sealing material is generally applied to any one of the joining surfaces 37A and 38A or the joining surfaces 52A and 53A. However, if the sealing material is applied to the entire surface, it takes work time and costs are high.

  Therefore, instead of applying the sealing material to the entire surface, as shown in FIG. 7, a non-conductive sheet material 62 is interposed between the joint surface 37A and the joint surface 52A, the joint surface 38A and the joint surface 53A, and the bolt By fastening with 59 and the nut 60, if it is set as the structure inserted | pinched between each joining surface, work efficiency will become good. Alternatively, as shown in FIGS. 8A and 8B, there is a difference in size between the joint portions 37 and 38 of the skeleton members 7 and 8 and the second joint portions 52 and 53 of the interface bracket 5. In such a case, the sealing material 64 is disposed so as to cover only the edge portions 63 of the joint portions 37 and 38 and the second joint portions 52 and 53 to prevent water from entering the joint surface, thereby causing electric corrosion. You may make it prevent. With such a configuration of the sealing material 64, the amount of the sealing material 64 to be used can be reduced, and the cost can be reduced.

  From the viewpoint of reducing the amount of the sealing material used, as shown in FIGS. 9A and 9B, the attachment holes 54A and 53A of the joint surfaces 52A and 53A of the second joint portions 52 and 53, A ring-shaped groove portion 65 may be formed on the outer peripheral side of 55, and a seal material 66 may be disposed in the groove portion 65 to prevent water from entering the joint surface, thereby preventing electrolytic corrosion. With such a configuration of the sealing material 65, the amount of the sealing material 65 to be used can be reduced, and the cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Car body 2 Cabin part 3 Front structure 5 Interface bracket 7, 8 Frame member 30, 31 Suspension support member 32, 33 Side member 37A, 38A Joint surface of frame member 37A1, 38A1 First surface 37A2, 38A2 Second Surface 37A3, 38A3 Third surface 51 First joint 52, 53 Second joint 52A, 53A Second joint 52A1, 53A1 First surface 52A2, 53A2 Second surface 52A3, 53A3 Third surface 59 Fastening member Z External force input direction

Claims (2)

In a vehicle body structure having a cabin portion of a vehicle body and a front structure positioned in front of the vehicle relative to the cabin portion, wherein the cabin portion and the front structure are made of different metals .
The front structure includes a plurality of skeleton members each including side members positioned in the vehicle width direction, and suspension support members that are positioned above the side members and attach suspensions, respectively .
A first joint that is interposed between the cabin and each skeleton member and is joined to the cabin; and a second joint that is positioned in the vehicle width direction and is detachably joined to the skeleton. The front structure is attached to and detached from the cabin by welding the cabin and the first joint and fastening the skeleton member and the second joint. A vehicle body structure characterized by having one interface bracket to be supported . The second joint portion and the skeleton member each have a joint surface that joins each other,
The shape of each joint surface is a first surface extending in the vehicle front-rear direction that intersects the vehicle vertical direction, and second and third surfaces that are positioned on both ends of the first surface and extend in the vehicle vertical direction, respectively. And each formed with
The vehicle body structure according to claim 1, wherein the first to third surfaces are joined to each other and joined by a fastening member .

Images