JP5790274B2 - Vehicle frame structure - Google Patents

Description

The present invention relates to a frame structure for a vehicle reinforcing member is embedded in a metal frame body.

  2. Description of the Related Art Conventionally, in order to improve the strength and rigidity of a vehicle frame, a frame body in which a reinforcing body is built is known. Among these, for example, the following Patent Documents 1 and 2 disclose a frame body made of a metal plate with a resin reinforcing body built therein, and the following Patent Document 1 discloses a hard synthetic resin such as 66 nylon. While a reinforcing body made of a material is used, in the following Patent Document 2, an epoxy-based or urethane-based foamable reinforcing body is used.

  In the following Patent Documents 1 and 2, by using a resinous reinforcing body, the entire frame is reduced in weight, that is, improved in weight efficiency, while ensuring the strength and rigidity of the frame.

  Moreover, in the vehicle frame, a frame body is often used by welding a plurality of metal plates. In the following Patent Document 2, a metal frame main body is configured by performing laser welding on a flange surface formed on two metal plates.

In addition, as a method of welding a plurality of metal plates, for example, as disclosed in Patent Document 3 below, a method of performing arc welding on an overlapping portion where a plurality of metal plates are overlapped is known. Yes. In Patent Document 3, by providing the convex portions on at least something Re of two galvanized steel sheet, it forms a gap around the weld, zinc Thus, the vaporized during arc welding (gas) Is allowed to escape from the gap.

Japanese Patent Laid-Open No. 2002-362412 JP 11-235987 A Japanese Patent Laid-Open No. 62-179869

  By the way, in manufacture of the said frame for vehicles, after fixing the reinforcement body which affixed the foaming adhesive previously to a metal plate (temporarily fixing), welding is given to several metal plates, and a flame | frame main body is produced | generated. And the inner wall and reinforcement body of a frame main body are joined by making the said foaming adhesive foam in a coating drying furnace.

  However, as described above, if the metal plate is welded after fixing the reinforcing body to which the foamed adhesive is affixed to the metal plate, the reinforcing body and the foamed adhesive at a position corresponding to the welded portion are damaged by the welding heat. There was a problem.

  In Patent Documents 1 and 2, as described above, although a vehicle frame in which a reinforcing body is built in the frame body is disclosed, there is no disclosure about measures for preventing damage to the reinforcing body and the foamed adhesive. Absent. Moreover, in the said patent document 3, only the method of welding a some metal plate (galvanized steel plate) is disclosed, and there is no indication or suggestion about the said countermeasure.

This invention aims to provide a vehicle frame structure which can prevent the reinforcing member or foamed adhesive by welding heat generated during the welding of the metal plate is damaged.

The vehicle frame structure according to the present invention is a vehicle frame structure in which a reinforcing body is incorporated in a metal frame body, and the frame body is formed by superposing two or more metal plates in the inner and outer directions of the frame body. The reinforcing body is disposed on the inner side of the frame body at a predetermined interval from the overlapping portion, and is joined to the inner wall of the overlapping portion with a foam adhesive. Of the two or more metal plates located in the overlapping portion, at least a first metal plate located on the innermost side of the frame body is separated from the reinforcing body. A convex portion projecting outward of the first metal plate, and welding is performed at the convex portion, and the first metal plate and the outer side of the first metal plate and the frame body around the convex portion. 2nd gold next to In which a gap is provided between the plate.

According to this configuration, it is possible by the convex portion of the first metal plate located on the most inner side of the frame body, to ensure the distance from the weld to the beauty before foaming of the foaming adhesive Oyo reinforcement. For this reason, it can prevent that a reinforcement body and a foaming adhesive agent are damaged with the welding heat which generate | occur | produces at the time of welding of a metal plate.

Moreover , a gap is provided between the first metal plate and the second metal plate adjacent on the outer side of the frame body around the convex portion . Gas generated at the time of welding can be escaped from the gap, and as a result, the occurrence of poor welding can be prevented. Therefore, in this case, it is possible to achieve both prevention of damage to the reinforcing body and the foamed adhesive and prevention of poor welding.

  In one embodiment of the present invention, a flat portion facing the first metal plate and the inner wall of the second metal plate adjacent to the outer side of the frame body is provided at the top of the convex portion. Is.

According to this structure, even if it does not raise the processing precision of a convex part extremely, the convex part of a 1st metal plate and a 2nd metal plate can be piled up without gap. Thus, while improving the ease of forming the convex portion, Ru can improve the reliability and ease of welding in the convex portion.

According to the present invention, it is possible by the convex portion of the first metal plate to secure the distance from the weld to the reinforcing body and before foaming of the foaming adhesive. For this reason, it can prevent that a reinforcement body and a foaming adhesive agent are damaged with the welding heat which generate | occur | produces at the time of welding of a metal plate.

  In addition, since a gap is provided between the first metal plate and the second metal plate adjacent to the first metal plate and the outer side of the frame body around the convex portion, gas generated during welding is generated. As a result, it is possible to prevent the occurrence of poor welding, and thus it is possible to achieve both prevention of damage to the reinforcing body and foamed adhesive and prevention of poor welding.

The perspective view which shows the frame structure for vehicles which shows the premise structure of this invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. The figure for demonstrating the manufacturing method of the flame | frame for vehicles. The side view which shows the vehicle body structure to which the frame for vehicles is applied. A main part perspective view of Figure 4, illustrates a joint and its periphery of the side sill front and hinge pillar lower end. Sectional drawing which shows the reference example of the frame structure for vehicles . Sectional view showing a frame structure for a vehicle according to the implementation embodiments of the present invention.

Prior to the description of the onset Ming embodiment, first, it is described in detail the structure to be a prerequisite.
Figure 1 is a perspective view showing a vehicle dual frame structure, Figure 2 is an A-A sectional view taken along line of FIG. A vehicle frame 1 shown in FIGS. 1 and 2 (hereinafter simply abbreviated as “frame 1”) is a frame body having a substantially rectangular closed cross-section 30 continuous in the longitudinal direction, and is mainly made of a metal frame. 10 and a reinforcing body 20 made of resin.

The frame body 10 is composed of first and second metal plates 11 and 12 having a hat-shaped cross section and a third metal plate 13 having a flat plate shape, and is formed at both ends of the first and second metal plates 11 and 12. A closed section 30 having a substantially rectangular shape is formed by welding and joining the flange portions 11a and 12a and the end of the third metal plate 13, and the reinforcing body 20 described above is incorporated in the closed section 30. Yes. Here, the flange portion 11a, and 12a and the end portion of the third metal plate 13, for example, other spot welding, laser welding, arc welding, joining by a method such as so-called high energy Gibi over beam welding such as plasma welding Is possible. In addition , although the 1st plate-shaped metal plate is used as the 3rd metal plate 13, it is not necessarily limited to this, It is also possible to make it a cross-sectional hat shape like the 1st, 2nd metal plates 11 and 12. It may be composed of a plurality of metal plates.

  By the way, the frame main body 10 has an overlapping portion 14 in which ends of the first and second metal plates 11 and 12 having a hat-shaped cross section overlap each other in the inner and outer directions of the frame main body 10. And in this overlapping part 14, welding is given along the edge part of the edge part of the 1st, 2nd metal plates 11 and 12, and both the metal plates 11 and 12 are joined by this. In addition, the site | part of the code | symbol 15 shown in FIG. 1, FIG. 2 is the welding trace 15 formed after welding of the overlap part 14. FIG.

In the overlapping portion 14, the first and second metal plates 11 and 12 are overlapped in a state where they are disposed on the inner side and the outer side of the frame body 10, respectively. The first metal plate 11 located on the innermost side is provided with a convex portion 11b having an arcuate cross section that protrudes away from the reinforcing body 20 toward the outer side, and the second metal plate 12 is provided. In FIG. 5, a convex portion 12b similar to the convex portion 11b is provided, and the convex portions 11b and 12b overlap each other. And the 1st, 2nd metal plates 11 and 12 are joined by welding the top part of these convex parts 11b and 12b. Here, first, second metal plates 11, 12 (projecting portions 11b, 12b), for example, laser welding, arc welding, in addition to being joined by a high energy Gibi over beam welding such plasma welding, joined by one-side spot welding It is also possible to do.

  In the present embodiment, the reinforcing body 20 in the closed cross section 30 is disposed so as to be spaced apart from the inner wall of the frame body 10 by a predetermined distance. A gap between the frame main body 10 and the reinforcing body 20 is filled with a foamed adhesive 40, and the frame main body 10 and the reinforcing body 20 are joined by the foamed adhesive 40. Thereby, in the overlapping portion 14, the reinforcing body 20 is arranged on the inner side of the frame body 10 with a predetermined distance from the overlapping portion 14, and the reinforcing body 20 becomes the inner wall of the overlapping portion 14. One metal plate 11 is bonded to the inner wall with a foam adhesive 40.

  Next, a method of manufacturing the frame 1 in which the reinforcing member 20 is built in the frame body 10 will be described with reference to FIG. In manufacturing the frame 1, first, as shown in FIG. 3A, a foamed adhesive 40 is affixed to the outer wall of the reinforcing body 20 except for a part, and the fixed portion 2 described later is attached to the above part. Install.

  Then, as shown in FIG. 3 (b), the reinforcing body 20 'is formed on the intermediate product 10' in which the flange 11a (see FIG. 1) of the first metal plate 11 is previously joined to the end of the metal plate 13 and integrated. Temporarily fix. Here, the temporary fixing tool 3 is attached to the third metal plate 13, and in the temporary fixing process shown in FIG. 3B, the fixed portion 2 on the reinforcing body 20 side is fixed by the temporary fixing tool 3. Thus, the reinforcing body 20 is positioned with respect to the intermediate product 10 '. Here, the first metal plate 11 is provided with a convex portion 11 b in advance, and in FIG. 3B, the convex portion 11 b is arranged in a state of protruding so as to be separated from the reinforcing body 20.

  Next, as shown in FIG. 3C, the second metal plate 12 is superimposed on the first metal plate 11 at a position where the reinforcing body 20 is temporarily fixed. Here, also in the 2nd metal plate 12, similarly to the 1st metal plate 11, the convex part 12b is provided previously, and in the superposition process shown in FIG.3 (c), two metal plates 11 and 12 are provided. The 2nd metal plate 12 is piled up so that convex parts 11b and 12b formed, respectively may overlap. As described above, through the overlapping process shown in FIG. 3C, in the overlapping portion 14, the first metal plate 11 provided with the convex portion 11 b described above is disposed at least on the side close to the reinforcing body 20. Will be.

Then, in a state where the first and second metal plates 11 and 12 are overlapped, as shown in FIG. 3D, welding is performed on the convex portions 11b and 12b. Here, FIG. 3 (d), the convex portion 11b, shows the case where 12b are welded by laser welding, in this case, laser Zabi chromatography beam along a laser scanning device 4 on top of the convex portion 11b, 12b Irradiation with LB joins the convex portions 11b and 12b, that is, the first metal plate 11 and the second metal plate 12, while forming the weld mark 15 on the top portion. And although illustration is abbreviate | omitted, the flame | frame main body 10 is produced | generated by welding the flange part 12a of the 2nd metal plate 12 to the edge part of the 3rd metal plate 13 in combination with the welding process shown in FIG.3 (d). The

  Next, with the reinforcing body 20 temporarily fixed, the frame body 10 is transported to a coating drying furnace, and the foamed adhesive 40 is heated and foamed. Thereby, as shown in FIG. 3 (e), the foamed adhesive 40 is filled in the gap between the inner wall of the frame body 10 and the reinforcing body 20, and the reinforcing body 20 is joined to the inner wall of the frame body 10.

As described above, in the manufacturing method shown in FIG. 3, the first metal plate 11 provided with the convex portions 11 b is provided at least at the position closest to the reinforcing body 20, that is, the innermost side of the frame body 10 to be generated later. The protrusions 11b and 12b are laser-welded in a state where the protrusions 11b are arranged so as to protrude away from the reinforcing body 20. In this case, by the convex portion 11b, it is possible to secure a distance to foamed adhesive 40 before the reinforcing member 20 and the foam from the weld generated during the welding of the first and second metal plates 11, 12 It is possible to prevent the reinforcing body 20 and the foamed adhesive 40 from being damaged by the welding heat of the laser beam LB.

Then, the frames produced by the production method described above, for example applied to the vehicle will be described.
FIG. 4 is a side view showing a vehicle body structure to which a frame according to the present invention is applied, and FIG. 5 is a perspective view of the main part. In the figure, the arrow (F) indicates the front of the vehicle body, and the arrow (R) indicates the rear of the vehicle body.

A vehicle body X shown in FIG. 4 includes a pair of left and right front side frames 50 that mainly extend in the longitudinal direction of the vehicle body at the front portion of the vehicle body, a side sill 51 that extends in the longitudinal direction of the vehicle body at the lower portion of the vehicle body, and a rear end portion of the front side frame 50. A pair of left and right hinge pillars 52 extending in the vertical direction in the vicinity, a front pillar 53 (also referred to as an A pillar) extending rearward and upward from the upper end of the hinge pillar 52, and a rear end of the front pillar 53 at the upper part of the vehicle body a roof rail 54 which extends in the vehicle longitudinal direction (also referred to as a B-pillar) Sen Tapi error connecting both extending vertically from the roof rail 54 toward the side sill 51 and a 55.

  In the vehicle body X shown in FIG. 4, when a load is input from the front of the vehicle due to a frontal collision of the vehicle or the like, the load can be transmitted to the rear of the vehicle by the front side frame 50.

Further, the vehicle body X, a side sill 51, the hinge pillar 52, the front pillar 53, a roof rail 54 by a sensor Tapi error 55, the front seat, the opening 56, 57 for the occupant of the rear seat is formed. The hinge pillar 52, Sen Tapi Ra 55 is made each door provided corresponding to the openings 56 and 57 (not shown) so as to openably supported.

Of these, hinge pillars 52, as shown in FIGS. 4 and 5, the outer panel thereof with the lower end is joined to the front end portion of the side sill 51, nothing Re also (not shown) the inner panel of the vehicle interior side of the exterior A continuous closed section 58 (see FIG. 5) is formed by joining 51A and 52A. Then, in the closed cross section 58, as shown in FIG. 5, a built-in resin reinforcement 59 extending in the longitudinal direction of the vehicle body, the foamed adhesive 60, the reinforcing member 59 is hinge pillars 52 and the side sill 51 It is joined to the inner wall.

  Further, an overlapping portion 61 is formed by the front end portion of the side sill 51 and the rear end portion of the hinge pillar 52. In the overlapping portion 61, the outer panel 51A of the side sill 51 located on the innermost side (the vehicle inner side) is formed. A convex portion 51a that is spaced outward from the reinforcing body 59 (outside the vehicle) is provided. The hinge pillar 52 is also provided with a convex portion 52a similar to the convex portion 51a, and the convex portions 51a and 52a are overlapped with each other.

In the overlapping portion 61, the outer panel 51A of the side sill 51 and the outer panel 52A of the hinge pillar 52 correspond to the first metal plate 11 and the second metal plate 12, respectively, and laser welding is performed along the convex portions 51a and 52a. By doing so, both the outer panels 51A and 52A are joined. In FIG. 5, portion indicated by reference numeral 62 is a welding mark formed by laser welding.

  By the way, when a load is input from the front of the vehicle body due to a frontal collision of the vehicle, first, the load is transmitted to the rear of the vehicle body via the front side frame 50, and a part of the load is transmitted to the lower part of the vehicle body via the hinge pillar 52. It is transmitted to the side sill 51. A large load is input to the joint portion between the lower end portion of the hinge pillar 52 and the front end portion of the side sill 51 toward the rear of the vehicle body.

  Therefore, in the vehicle body X, as shown in FIG. 5, a reinforcing body 59 extending in the longitudinal direction of the vehicle body is disposed at a joint portion between the front end portion of the side sill 51 and the lower end portion of the hinge pillar 52. Accordingly, even if the load is input to the joint through the front side frame 50, the joint is prevented from being deformed, and as a result, the load is more reliably transmitted to the vehicle body through the side sill 51. Can be transmitted and distributed to the rear.

Incidentally, FIG. 4, FIG. 5 was the application of the frame structure for a vehicle in front and joints bonded by superposing and a lower end of the hinge pillar 52 of the side sill 51, the frame structure for the vehicle, not necessarily this It is not limited to. For example, roof rail 54 and the joint and joined by overlapping the upper end portion of the sensor Tapi Ra (B-pillar) 55, side sills 51 and Sen Tapi error (B-pillar) Joints bonded by superposing and a lower end of the 55 it may be applied to.

Figure 6 shows a reference example of car dual frame structure. In the reference example shown in FIG. 6, the flat portion 11b1 is provided on the top of the convex portion 11b provided on the first metal plate 11 located on the innermost side of the frame main body 10, and the first metal plate 11 and the frame main body are provided. The second metal plate 12 adjacent on the outer side of 10 is also provided with a convex part 12b similar to the convex part 11b, and a flat part 12b1 is provided on the top. And the flat part 11b1 is arrange | positioned so that it may oppose substantially parallel to the inner wall of the flat part 12b1, and laser welding is given in the flat parts 11b1 and 12b1. In FIG. 6, the same components as the previous components shown in FIGS. 1 to 5, its description is omitted with the same reference numerals.

In the reference example shown in FIG. 6, by providing the flat portion 11 b 1 facing the inner wall of the second metal plate 12 (here, the flat portion 12 b 1 of the convex portion 12 b) substantially parallel to the convex portion 11 b of the first metal plate 11, Even if the processing accuracy of the convex portion 11b is not extremely increased, the convex portion 11b of the first metal plate 11 and the second metal plate 12 can be overlapped without any gap. Therefore, it is possible to improve the certainty and ease of welding in the convex portion 11b while improving the ease of forming the convex portion 11b.

Figure 7 shows an embodiment of a vehicle frame structure according to the present invention. In the embodiment shown in FIG. 7, as in the reference example shown in FIG. 6, the flat portion 11 b 1 is provided on the top of the convex portion 11 b provided on the first metal plate 11. And the flat part 11b1 is arrange | positioned so as to oppose substantially parallel to the inner wall of the 2nd metal plate 12 which has a flat surface in which the convex part is not provided, and laser welding is given in the flat part 11b1. In FIG. 7, the same components as the previous components shown in FIGS. 1 to 6, its description is omitted with the same reference numerals.

  In the present embodiment shown in FIG. 7, the first metal plate 11, the second metal plate 12, and the like are formed around the convex portion 11 b by using the second metal plate 12 having a flat surface on which the convex portion is not provided. A gap 16 is formed between the two. Thereby, for example, when a galvanized steel sheet is used as the metal plate as disclosed in Patent Document 3, the gas generated during welding (specifically, vaporized zinc) can be released from the gap 16. As a result, it is possible to prevent the occurrence of poor welding. Therefore, in the case of this embodiment, damage prevention of the reinforcement body 20 and the foaming adhesive 40 and prevention of poor welding can be made compatible.

In the configuration described above, nothing Re also two metal plates 11 and 12 (outer panel 51A, 52A) has been described to be joined by overlapping, not necessarily limited thereto, three or more The present invention may be applied when the metal plates are overlapped and joined.

In correspondence between the configuration of the present invention and the above-described embodiment,
Of the present invention, the first metal plate, the first metal plate 11, corresponding to the outer panel 51A of and the side sill 51,
Similarly,
The second metal plate, a second metal plate 12, also corresponds to the outer panel 52A of and the hinge pillar 52,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Vehicle frame 10 ... Frame main body 11 ... 1st metal plate 11b, 12b ... Convex part 11b1, 12b1 ... Flat part
DESCRIPTION OF SYMBOLS 12 ... 2nd metal plate 14, 61 ... Overlapping part 16 ... Gap 20, 59 ... Reinforcement body 40, 60 ... Foam adhesive 51 ... Side sill (1st metal plate)
52 ... Hinge pillar (second metal plate)
51 A ... Outer panel (first metal plate)
52A ... Outer panel (second metal plate)

Claims (2)

A vehicle frame structure in which a reinforcing body is built in a metal frame body,
The frame main body has an overlapping portion in which two or more metal plates are overlapped in the inner and outer directions of the frame main body,
The reinforcing body is disposed on the inner side of the frame body at a predetermined interval from the overlapping portion, and
It is joined to the inner wall of the overlapping part with foam adhesive,
Of the two or more metal plates positioned in the overlapping portion, at least the first metal plate positioned on the innermost side of the frame main body has an outer side of the frame main body so as to be separated from the reinforcing body. Protrusions protruding to the side are provided,
Welding is performed at the convex part ,
A vehicle frame in which a gap is provided between the first metal plate and the second metal plate adjacent on the outer side of the frame body around the convex portion. Construction. The top of the convex portion, according to <br/> claim 1, the inner wall and the flat portion substantially parallel to the opposing second metal plate adjacent in the outer side is provided in the first metal plate and the frame body frame structure for the vehicle.

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