JP2019018764A - Joining structure for vehicle skeleton member - Google Patents

Abstract

A joining structure for a vehicle frame member is provided, which can stably connect a resin roof reinforcement and a metal extension while reducing the weight of the roof of the vehicle. A straight line connecting a joint portion 24 arranged closest to one side in a vehicle front-rear direction in a first row 32 and a joint portion 24 of a second row 34 arranged closest to the joint portion 24 is a vehicle It is inclined with respect to the longitudinal direction of the vehicle when viewed from the vertical direction. Therefore, when the axis of the moment acting on the roof reinforcement 18 and the extension 20 is inclined with respect to the longitudinal direction of the vehicle when viewed from the vertical direction of the vehicle, the distance between the axis and the joint portion 24 of the first row 32 , the distance between the axis and the joint 24 of the second row 34 can be small. [Selection drawing] Fig. 1

Description

  The present invention relates to a joint structure for a vehicle skeleton member.

  The following Patent Document 1 discloses an invention relating to a joint structure of a vehicle skeleton member. In the joint structure of the vehicle skeleton member, the outer panel having a hat-shaped cross section viewed from the longitudinal direction and the inner panel including one material and the other material are viewed from the longitudinal direction. A skeletal member having a rectangular cross section is configured.

  Specifically, one material has a plate shape that extends uniformly, and the other material has a plate shape in which a marginal portion is formed at an end thereof. The material is joined by spot welds provided at both ends of the first adhesive portion and the margin portion along the margin portion. The inner panel is formed by a spot welded portion provided at predetermined intervals along a flange portion of the outer panel and at a plurality of positions along a second adhesive portion and a flange portion that form an H shape with the first adhesive portion. It is joined to. For this reason, the strength with respect to a bending load of a pillar, a side member, etc. can be ensured by applying the prior art described in the following Patent Document 1 to a skeleton member of a vehicle.

  By the way, although it is possible to apply the prior art described in the following Patent Document 1 to a roof reinforcement for reinforcing the roof panel, the vehicle skeleton member according to the following prior art is entirely made of a metal material. Therefore, a problem remains from the viewpoint of weight reduction.

  In view of the above, it is conceivable to reduce the weight by configuring the roof reinforcement with a resin material, but it is difficult to directly and firmly attach the resin roof reinforcement to the metal roof side rail. Here, it is conceivable that a metal extension is connected to a resin roof reinforcement by a joint portion by rivet joining, and the roof reinforcement is attached to the roof side rail via this extension. And according to such a structure, the weight reduction of the roof part of a vehicle can be achieved.

JP 2002-096759 A

  However, if the arrangement location of the joint portion between the resin roof reinforcement and the metal extension is set in the same manner as the arrangement location of the spot welded portion in the above prior art, the end portion in the longitudinal direction of the roof reinforcement In some cases, stress is concentrated on the joint portion that joins.

  This point will be described in detail. When the axis of moment acting on the roof reinforcement is inclined with respect to the vehicle longitudinal direction when viewed from the vehicle vertical direction, the joint portion arranged at the end of the roof reinforcement is selected. This moment may be supported primarily by a single joint. In this case, of the joints arranged at the end of the roof reinforcement, a force in a direction separating the roof reinforcement and the extension acts on the joint where the moment is mainly supported. It is conceivable that stress concentrates on the joint. That is, if the arrangement location of the joint portion between the roof reinforcement and the extension is set in the same manner as the arrangement location of the spot welded portion, a problem remains in terms of stabilizing the connection state between the roof reinforcement and the extension.

  In consideration of the above-mentioned fact, the present invention provides a vehicle frame member joining structure capable of stably connecting a resin roof reinforcement and a metal extension while reducing the weight of the roof of the vehicle. The purpose is to obtain.

  According to a first aspect of the present invention, there is provided a vehicular frame member joining structure that is disposed between a pair of left and right roof side rails that form a part of a roof portion of a vehicle body and extend in the vehicle front-rear direction. An extended resin roof reinforcement, a metal interposed between the roof side rail and the roof reinforcement, and connected to the end of the roof reinforcement by a plurality of joints by rivet joining An extension of the first joint portion disposed on the one side in the vehicle front-rear direction in the plurality of joint portions disposed on the outermost side in the vehicle width direction and along the vehicle front-rear direction. The second joint portion that is disposed closest to the first joint portion on the inner side in the vehicle width direction of the first joint portion as viewed from the vehicle vertical direction among the plurality of joint portions is directly connected. There are inclined with respect to the vehicle longitudinal direction as viewed from the vertical direction of the vehicle.

  According to the first aspect of the present invention, the roof reinforcement that extends in the vehicle width direction is disposed between the pair of left and right roof side rails that constitute a part of the roof portion of the vehicle body and extend in the vehicle longitudinal direction. Yes. This roof reinforcement is made of resin, and the weight of the roof portion and thus the vehicle body can be reduced.

  In addition, a metal extension is interposed between the roof reinforcement and the roof side rail, and the roof reinforcement is fixed to the roof side rail via the extension. The roof reinforcement and the extension are connected by a plurality of joints by rivet joining.

  By the way, when a moment acts on the roof reinforcement and the extension, the axis of the moment may be inclined with respect to the vehicle longitudinal direction when viewed from the vehicle vertical direction. In this case, when the plurality of joint portions are arranged at regular intervals in the vehicle width direction and the vehicle width direction, the plurality of joint portions are arranged on the outermost side in the vehicle width direction and along the vehicle front-rear direction. It is conceivable that the moment is mainly supported by the joint disposed at the one side in the vehicle front-rear direction at the joint. Then, a force in the direction of separating the roof reinforcement and the extension acts on the joint where the moment is mainly supported, and as a result, stress may be concentrated on the joint.

  Here, in the present invention, in the plurality of joint portions, the first joint portion arranged on the most vehicle longitudinal direction side of the joint portion arranged on the outermost side in the vehicle width direction and along the vehicle longitudinal direction. The second joint is arranged closest. And the straight line which connects a 1st junction part and a 2nd junction part inclines with respect to the vehicle front-back direction seeing from the vehicle up-down direction. For this reason, when the axis of the moment acting on the roof reinforcement and the extension is inclined with respect to the vehicle longitudinal direction when viewed from the vehicle vertical direction, the distance between the shaft and the first joint, the shaft and the second joint, and so on. The difference with the distance from the part can be made small. As a result, it is possible to suppress the force in the direction of separating the roof reinforcement and the extension due to the moment from being distributed to the first joint portion and the second joint portion, and the stress from being concentrated on the first joint portion.

  As described above, the vehicle frame member joining structure according to the first aspect of the present invention stabilizes the resin roof reinforcement and the metal extension while reducing the weight of the vehicle roof. It has the outstanding effect that it can connect in the state which carried out.

It is a top view (one direction arrow view of Drawing 2) showing the composition of the roof part of vehicles to which the joining structure of the framework member for vehicles concerning this embodiment was applied. 1 shows a configuration of a vehicle roof portion to which a vehicle frame member joining structure according to the present embodiment is applied, and is a cross-sectional view of a connection portion between a roof reinforcement and an extension as viewed from the vehicle width direction (2 in FIG. 1). FIG. 2 is a cross-sectional view showing a state cut along line -2.

  Hereinafter, an example of an embodiment of a joint structure for a vehicle skeleton member according to the present invention will be described with reference to FIGS. 1 and 2. Note that an arrow FR that is appropriately shown in each drawing indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  First, a schematic configuration of the “vehicle body 12” in the “vehicle 10” according to the present embodiment will be described with reference to FIG. In the present embodiment, the vehicle body 12 basically has a bilaterally symmetric configuration. Therefore, the configuration of the vehicle body 12 on the right side in the vehicle width direction will be mainly described below. The description of this configuration will be omitted as appropriate.

  In the vehicle body 12, a pair of left and right front pillars (not shown), a pair of left and right center pillars (not shown), and a pair of left and right rear pillars (not shown) are arranged in this order from the vehicle front side. A pair of left and right “roof side rails 16” constituting a part of the “roof portion 14” of the vehicle body 12 are supported on the upper ends of the front pillar, the center pillar, and the rear pillar.

  The roof side rail 16 extends in the vehicle front-rear direction, and includes an outer panel that forms an outer portion in the vehicle width direction and an inner panel that forms an inner portion in the vehicle width direction. The roof side rail 16 has a closed cross-sectional structure in which a cross section viewed from the vehicle front-rear direction is a closed cross section by joining an outer panel and an inner panel at a joint (not shown) by spot welding or the like.

  Further, between the roof side rails 16, a “roof reinforcement 18” made of carbon fiber reinforced resin that extends in the vehicle width direction and reinforces the roof portion 14 is disposed. The roof reinforcement 18 may be made of a reinforced resin such as a glass fiber reinforced resin.

  As shown in FIG. 2, the roof reinforcement 18 is a rectangular rectangular tube that constitutes a main portion of the roof reinforcement 18 and has a cross-sectional shape viewed from the vehicle width direction as a longitudinal direction in the vehicle front-rear direction. The main body portion 18A linearly extending in the vehicle width direction and the flange portions 18B and 18C are configured.

  The main body portion 18A is configured by a plate-like upper wall portion 18A1 in which the vehicle upper side portion has a plate thickness direction in the vehicle vertical direction, and the vehicle lower side portion has the same shape as the upper wall portion 18A1. It is comprised by the lower wall part 18A2 made into. Further, the vehicle front side portion of the main body portion 18A is configured by a plate-like front wall portion 18A3 whose plate thickness direction is the vehicle front-rear direction, and the vehicle rear side portion of the main body portion 18A is the front wall portion. The rear wall portion 18A4 has the same shape as the portion 18A3.

  On the other hand, the flange portion 18B extends from the boundary between the upper wall portion 18A1 and the front wall portion 18A3 to the front side of the vehicle, and has a rectangular plate shape extending in the vehicle width direction when viewed from the vehicle vertical direction. Yes. The flange portion 18C extends from the boundary between the upper wall portion 18A1 and the rear wall portion 18A4 to the vehicle rear side, and has the same shape as the flange portion 18B. A steel “extension 20” is interposed between the roof reinforcement 18 and the roof side rail 16 configured as described above.

  The extension 20 is formed by pressing a plate-shaped steel material. The extension 20 is arranged with the vehicle width direction as a longitudinal direction, and includes a lower wall portion 20A, side wall portions 20B and 20C, flange portions 20D and 20E, and a cross section viewed from the extending direction. The shape is a hat shape opened to the vehicle upper side.

  Specifically, the lower wall portion 20A constitutes a portion of the extension 20 on the vehicle lower side, and has a plate shape in which the plate thickness direction is the vehicle vertical direction. Side wall part 20B is extended from the peripheral part of the vehicle back side to 20V of side walls, respectively.

  The side wall portion 20B constitutes a portion of the extension 20 on the vehicle front side and is formed in a plate shape in which the plate thickness direction is the vehicle front-rear direction, and from the peripheral portion on the vehicle upper side of the side wall portion 20B. Has a flange portion 20D extending in the vehicle vertical direction on the front side of the vehicle.

  On the other hand, the side wall portion 20C constitutes a portion of the extension 20 on the vehicle rear side and is formed in a plate shape in which the plate thickness direction is the vehicle front-rear direction, and the peripheral edge on the vehicle upper side of the side wall portion 20C. From the portion, a flange portion 20E is extended to the vehicle rear side with the plate thickness direction being the vehicle vertical direction. The extension 20 is fixed by joining the outer portions of the flange portions 20D and 20E in the vehicle width direction to the roof side rail 16 by the joint portion 22 by spot welding or the like.

  On the other hand, the extension 20 is disposed in a state in which the “end portion 18D” of the roof reinforcement 18 is overlapped on the vehicle upper side from the longitudinal center portion of the extension 20 (hereinafter referred to as the inner portion 20F). Has been. The end portion 18D of the roof reinforcement 18 and the inner portion 20F of the extension 20 are connected by a plurality of “joining portions 24” by rivet joining.

  Here, in this embodiment, the joint structure of the vehicle skeleton member according to this embodiment is applied to the plurality of joint portions 24 that connect the roof reinforcement 18 and the extensions 20. Hereinafter, the configuration of the joint portion 24 that constitutes the main part of the present embodiment will be described in detail.

  As shown in FIG. 2, the joint portion 24 includes an insertion portion 26 formed on the inner portion 20 </ b> F of the extension 20 and a covered portion formed on the end portion 18 </ b> D of the roof reinforcement 18 corresponding to the insertion portion 26. The insertion portion 28 and the rivet 30 are included. Specifically, with the inserted portion 26 and the corresponding inserted portion 28 aligned, the rivet 30 is inserted into the inserted portions 26 and 28 and crimped, so that the roof reinforcement 18 and the extension 20 are connected.

  In the present embodiment, the plurality of joint portions 24 are arranged in three rows in the vehicle width direction, and the “first row 32” arranged on the outermost side in the vehicle width direction includes the lower wall portion 18A2 and the lower wall. It is composed of two joint portions 24 that are joined to the portion 20A and arranged continuously in the vehicle longitudinal direction.

  In addition, a “second row 34” is disposed on the inner side in the vehicle width direction of the first row 32. The second row 34 includes a joint portion 24 that joins the flange portion 18B and the flange portion 20D, and a flange. A joint portion 24 that joins the portion 18C and the flange portion 20E is arranged in a row in the vehicle front-rear direction.

  And the 3rd row | line | column 36 is arrange | positioned inside the vehicle width direction of the 2nd row | line 34, The said 3rd row | line 36 has the junction part 24 which joins the flange part 18B and the flange part 20D, and a lower wall part. 18A2 and the lower wall portion 20A are joined together, and the two joining portions 24 arranged continuously in the vehicle longitudinal direction and the joining portion 24 joining the flange portion 18C and the flange portion 20E are arranged continuously in the vehicle longitudinal direction. Has been configured.

  The plurality of joints 24 are arranged so as to be symmetric with respect to the center line extending in the vehicle width direction of the roof reinforcement 18. Further, the joint portions 24 that join the flange portion 18B and the flange portion 20D, the joint portions 24 that join the lower wall portion 18A2 and the lower wall portion 20A, and the joint portion 24 that joins the flange portion 18C and the flange portion 20E. They are arranged so as to overlap each other when viewed from the vehicle width direction.

  Here, in the present embodiment, the joint portion 24 arranged on the most rear side of the first row 32 and the joint portion 24 closest to the inside of the joint portion 24 in the vehicle width direction when viewed from the vehicle vertical direction. A straight line L1 connecting the arranged joints 24 (joint parts 24 arranged on the most rear side of the second row 34) is inclined with respect to the vehicle front-rear direction when viewed from the vehicle vertical direction. Specifically, the straight line L1 extends from the vehicle rear inner side toward the vehicle front outer side.

  This straight line L1 corresponds to an assumed axis M1 of the moment acting on the roof reinforcement 18 and the extension 20 at the time of a side collision of the vehicle 10, that is, a straight line assumed to be an axis of the moment when the moment is applied, and the vehicle vertical direction. It is set to be parallel when viewed from above. Thereby, in this embodiment, it is possible to support the moment acting on the roof reinforcement 18 and the extension 20 at the time of a side collision of the vehicle 10 by the two joint portions 24 positioned on the straight line L1 when viewed from the vehicle vertical direction. It has become.

  That is, in the present embodiment, at the time of a side collision of the vehicle 10, the joint portion 24 on the vehicle rear side in the first row 32 functions as the first joint portion, and the joint portion 24 on the vehicle rear side in the second row 34. Functions as the second joint.

  Further, in the present embodiment, the joint 24 arranged at the most vehicle front side in the first row 32 and the joint 24 arranged closest to the joint 24 on the inner side in the vehicle width direction of the joint 24 as viewed from the vehicle vertical direction. A straight line L2 connecting the joined portions 24 (joint portions 24 arranged on the most front side of the second row 34) is inclined with respect to the vehicle front-rear direction as viewed from the vehicle vertical direction. Specifically, the straight line L2 extends from the vehicle front inner side toward the vehicle rear outer side.

  This straight line L2 is the assumed axis M2 of the moment acting on the roof reinforcement 18 and the extension 20 when the vehicle 10 rolls over, that is, the straight line assumed to be the axis of the moment when the moment is applied and the vehicle vertical direction. It is set to be parallel when viewed from above. Thereby, in this embodiment, it is possible to support the moment acting on the roof reinforcement 18 and the extension 20 at the time of rollover of the vehicle 10 with the two joint portions 24 positioned on the straight line L2 when viewed from the vehicle vertical direction. It has become.

  That is, in the present embodiment, when the vehicle 10 is rolled over, the joint portion 24 on the vehicle front side in the first row 32 functions as the first joint portion, and the joint portion 24 on the vehicle front side in the second row 34. Functions as the second joint.

(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.

  In the present embodiment, as shown in FIG. 1, a roof reinforcement that forms a part of the roof portion 14 of the vehicle body 12 and extends in the vehicle width direction between a pair of left and right roof side rails 16 that extend in the vehicle front-rear direction. 18 is arranged. The roof reinforcement 18 is made of resin, and the weight of the roof portion 14 and the vehicle body 12 can be reduced.

  Further, a metal extension 20 is interposed between the roof reinforcement 18 and the roof side rail 16, and the roof reinforcement 18 is fixed to the roof side rail 16 via the extension 20. The roof reinforcement 18 and the extension 20 are connected by a plurality of joints 24 by rivet joining.

  By the way, when a plurality of moments having different axes act on the roof reinforcement 18 and the extension 20, the axes of these combined moments may be inclined with respect to the vehicle longitudinal direction as viewed from the vehicle vertical direction. In this case, when the plurality of joint portions 24 are arranged at regular intervals in the vehicle width direction and the vehicle width direction, a plurality of joint portions 24 are arranged on the outermost side in the vehicle width direction and along the vehicle front-rear direction. In addition, it is conceivable that the moment is mainly supported by the joint portion arranged on the one side in the vehicle front-rear direction in the joint portion 24. A force in the direction of separating the roof reinforcement 18 and the extension 20 acts on the joint 24 where the moment is mainly supported, and as a result, stress may be concentrated on the joint 24. .

  Here, in the present embodiment, the joint portion 24 disposed on the one side in the vehicle front-rear direction in the first row 32 and the joint portion 24 of the second row 34 disposed closest to the joint portion 24 are provided. The connecting straight line is inclined with respect to the vehicle longitudinal direction as viewed from the vehicle vertical direction. For this reason, when the axis of the moment acting on the roof reinforcement 18 and the extension 20 is inclined with respect to the vehicle longitudinal direction when viewed from the vehicle vertical direction, the distance between the axis and the joint portion 24 in the first row 32 is The difference between the distance between the shaft and the joint 24 in the second row 34 can be reduced.

  As a result, the force in the direction of separating the roof reinforcement 18 and the extension 20 due to the moment is distributed to the joint 24 in the first row 32 and the joint 24 in the second row 34, and Concentration of stress on the joint portion 24 can be suppressed. Therefore, in the present embodiment, the resin roof reinforcement 18 and the metal extension 20 can be stably connected while reducing the weight of the roof portion 14 of the vehicle 10.

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Car body 14 Roof part 16 Roof side rail 18 Roof reinforcement 18D End part 20 Extension 24 Junction part 32 1st row | line (1st junction part)
34 Second row (second joint)

Claims (1)

A resin roof reinforcement extending between the pair of left and right roof side rails constituting a part of the roof portion of the vehicle body and extending in the vehicle longitudinal direction, and extending in the vehicle width direction;
A metal extension interposed between the roof side rail and the roof reinforcement, and connected by an end portion of the roof reinforcement and a plurality of joints by rivet joining;
With
Of the plurality of joints, a first joint disposed on the one side in the vehicle front-rear direction in the plurality of joints disposed on the outermost side in the vehicle width direction and along the vehicle front-rear direction, and the plurality of joints Of these, a straight line connecting the second joint disposed closest to the first joint on the inner side in the vehicle width direction of the first joint as viewed from the vehicle vertical direction is the vehicle longitudinal direction as viewed from the vehicle vertical direction. Inclined against
A joining structure of a skeleton member for a vehicle.