JPH06286651A - Car body structure of automobile - Google Patents

Abstract

PURPOSE:To reflect aluminum alloy, etc., by forming a monocock structure body having a closed section from an outer side extension member and a casted member formed integrally with a cab side inner side which takes integrally the part around a side door opened port part including a hinge pillar side. CONSTITUTION:The inner side of a cab side frame 9 which takes integrally the part around the side door opened port part including a hinge pillar part is constituted of a casted member 11, and the outer side of the cab side frame is constituted of an extension member 12. The casted member 11 is constituted of the light alloy such as aluminum alloy. On the inner side 9, hinge pillar reinforcements 14 and 15 and a roof panel 13 are installed directly and indirectly. A monocock structure body 10 having a closed section is formed from the casted member 11 on the inner side and the extension member 12 on the outer side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile body structure.

[0002]

2. Description of the Related Art Generally, in order to reduce fuel consumption and enable long-distance running in an automobile, it is required to reduce the weight of the vehicle body as much as possible, and to protect an occupant from an automobile accident or the like. It is also desired to make the vehicle body highly rigid.

Conventionally, a so-called monocoque structure in which an exterior member and a vehicle body frame are integrated has been adopted for a vehicle body of an automobile. This is an assembly in which each exterior member formed by press molding is joined by welding or the like, and the cross-sectional shape of each molded exterior member is formed into a closed cross-sectional shape that also serves as a reinforcing rib.

In contrast to this monocoque structure, from the viewpoint of weight reduction of the vehicle body, the skeleton structure constituting the engine room and the floor of the vehicle body and the skeleton structure defining the passenger space are made of aluminum alloy or magnesium alloy, etc. A so-called space frame structure has also been proposed in which a light body alloy is used for casting, and these are combined to form a highly rigid vehicle body frame (Japanese Patent Laid-Open No. 62-88674).

[0005]

However, aluminum alloys and the like have the advantages that they are light in weight and that complex shapes can be poured. Therefore, it is only necessary to use aluminum alloys or the like in the frame of the vehicle body as in the past. , Aluminum alloys, etc. are not fully utilized. On the other hand,
Aluminum alloys and the like also have handling difficulties different from those of steel plates, such as being unsuitable for welding. Therefore, it is desired to reflect the aluminum alloy or the like on the entire vehicle body of an automobile by effectively utilizing the advantages of aluminum alloy or the like that can be cast with a light weight.

The present invention provides a vehicle body structure of an automobile having a monocoque structure capable of reflecting the aluminum alloy or the like as a whole by effectively utilizing the advantages of the aluminum alloy or the like which can be cast with a light weight. To do.

[0007]

In order to achieve the above object, a vehicle body structure of an automobile according to the present invention is a cab side / inner side integrally cast member including a hinge pillar portion and integrally incorporated around a side door opening. The monocoque structure having a closed cross section is formed by the outer expansion member (claim 1).

The above-mentioned casting member is provided with mounting portions for other members (front header, roof reinforcement, rear header, package tray, etc.) and equipment mounting members (nuts,
At least one of the two can be integrally molded (claim 2).

The most preferable form is that the casting member is made of a light alloy (claim 3), and the wrought member is also made of a light alloy (claim 4).

[0010]

[Function] Generally, the hinge pillar root portion is
It is an important part. Further, the door opening is a portion that is more strict against the deformation because there is no deformation suppressing member in this portion like the front window and the rear window.

According to a first aspect of the present invention, the cab side / inner side integrally including the hinge pillar portion and around the side door opening is integrally cast, and the cast member is cast on the inner side,
The spread member is used on the outer side to form a monocoque structure having a closed cross section. Therefore, as compared with the case where the joint portion is integrally taken in by the conventional steel expanding member, there may be inconveniences such as hollowing of the corners of the parts and an open cross-section where vertical walls are not connected. Without this, the deformation of the door opening can be effectively prevented, so that the rigidity of the body as a whole can be improved. In addition, it is possible to obtain the optimum distribution of the required wall thickness, and it is possible to properly secure the mounting accuracy of the door hinge.

Further, since the outer side uses the extensibility member as in the conventional case, even if there is a dent portion (sink) due to heat shrinkage peculiar to the cast product, it can be concealed well by the trim etc., and the surface texture is extensibility. Since it can be secured by the member, the quality of the appearance does not deteriorate. Therefore, the above advantages can be achieved while improving the appearance.

Further, in the space frame structure and the like, there is a problem that a connecting portion of the members is formed at the opening portion and the seal between the door and the vehicle body cannot be properly taken off. However, in the present invention, the monocoque using casting is used. Since the frame is made for the entire structure and it can be made through the entire circumference, there is an advantage that the additional processing to secure the sealing property is less than in the past and the burden on the line side can be reduced. This means that by handling the cast product with the monocoque structure, the goodness of the monocoque structure can be incorporated as well.

According to a second aspect of the present invention, the casting member is provided with mounting portions for other members (for example, front header, roof reinforcement, rear header, package tray, etc.) and equipment mounting members (for example, nuts, clips, etc.). By integrally molding, it is possible to solve the problem of individually mounting these later.

Further, the continuity to other members can be improved, the binding force can be improved, and the rigidity of the body as a whole can be improved. Since other members such as accessories are mounted on the inner side, it is significant to integrally mold the inner side with a cast member.

To improve continuity of the above-mentioned other members,
For example, there are the following cases. That is, when removing the member on the inner side, the connection is improved by cutting it so that the other member also enters, but you do not want to extend it too much from the yield, and you want to make the press processing shallow. In some sense, there are cases where it cannot be extended. In such a case, by increasing the amount of entry into the mating member, or by arranging ribs properly as a trifurcated shape or an L shape,
While increasing the rigidity of the joint, it can be inserted into the other member.

According to the third or fourth aspect of the present invention, the casting member or the wrought member is made of a light alloy, and the weight can be reduced. Here, the "light alloy" refers to an alloy having a specific gravity lighter than that of steel, such as an aluminum alloy and a magnesium alloy. Aluminum alloys and magnesium alloys have a low melting point and thus have good workability in die casting, and also have good surface properties.

[0018]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 11 denotes a cab side frame 9 of an automobile, which integrally includes a hinge pillar portion and a portion around a side door opening portion, to be precise, a casting member constituting an inner side thereof, and 12 denotes a cab side frame 9
Is a stretchable member that constitutes the outer side of.

The casting member 11 on the inner side and the expanding member 12 on the outer side are overlapped with each other to form a monocoque frame body having a closed cross section for enhancing the rigidity of the vehicle body as shown in FIG. . Here, the “inner side” and the “outer side” mean the inside and the outside of the vehicle body with respect to the configuration of the closed cross-sectional shape. In this embodiment, the outer casting member 11 is made of aluminum alloy, but other light alloy such as magnesium alloy may be used.

The parts directly or indirectly attached to the cast member 11 constituting the cab side / inner side include the roof panel 13 and the hinge pillar reinforcements 14 and 15. However, the reinforcements 14 and 15 can be formed integrally with the cast member 11 and eliminated by obtaining an appropriate thickness distribution of the cast member 11. In addition, 21 is a front window,
22 is a rear window.

A roof rail portion shown as an AA cross section in FIG. 2 (a), a side sill portion as a BB cross section in FIG. 2 (b), and a rear fender portion as a CC cross section in FIG. 2 (c). 2D shows the front pillar portion as an EE cross section. In these parts, the outer side casting member 11 and the inner side expanding member 12 are combined to form a closed cross-section portion 10 of the monocoque frame body. However, a closed cross-section portion 10 is formed between the reinforcement 14 and the front pillar portion shown as an EE cross section in FIG. In these, since the cast member 11 is on the inner side, the surface of the cast member 11 is not exposed to the outside and impairs the appearance.

The casting member 11 has a thick portion 16 at a required portion thereof.
Is formed as. For example, it is a hinge mounting portion of the cab side frame 9, a striker portion, a jack-up portion, or the like.

As described above, the greatest advantage when the cabside frame 9 is integrally formed by casting is that the cabside has a greater strength and rigidity than before, and the strength distribution is further improved by the optimum distribution of the wall thickness. It has rigidity.

In particular, when mounting the door, since the door is cantilevered and takes a large weight, the supporting portion is integrated and made into a thick plate to increase the strength and rigidity. It is possible to improve the center accuracy and the like, and prevent the opening and closing feeling and the like from changing even when a large weight is applied. Further, in order to prevent the crush of the cabin and leave the living space for the occupant even in the case where the vehicle rolls over, the strength from the front pillar to the roof rail has an effect, so thicken this to obtain a predetermined strength. In this case, since the inner side is a casting, the tuning becomes easy.

3 and 4 show an embodiment in the case of a two-door type such as a sedan type or a coupe type. Figure 1 above
Since there is no particular difference from the embodiment of FIG. 2, the same reference numerals are given and the description thereof is omitted.

In the case of aluminum alloys and the like, welding is essentially incompatible. Therefore, the cast member 11 and the expanded member 1
It is connected to 2 by some fastening means.
(1) A method by crimping in which a part of the casting member is projected as a projection from the expansion member and is crushed and fixed by an external force, (2) a method of fixing the projection with a fastener such as a snap ring, (3) expansion There is a method in which a screw is passed through from the member side so as to penetrate the member, and the tip end of the screw is screwed into the cast member 11 to be fixed. Appropriate measures will be taken to prevent the appearance of the car body from being damaged.

By the way, in many cases, the thickness of the outside of the vehicle body cannot be increased due to the design and the like.
Due to the recent integration as a cab side outer, the outer side has a substantially constant plate thickness, and it is required to add strength to the inner side. Producing the inner side from a cast member is extremely suitable for such requirements. However, this casting means that what was conventionally separated as a separate member can be integrated. Also, making the inner side a casting member means that it cannot be seen from the outside, and of course there is no problem in appearance, and since there are many mounting parts inside, the mounting parts for them are integrated. There are advantages such as being possible.

In FIG. 1, the reinforcing parts (reinforcements 14, 15) are drawn so as to be incorporated, but if this can be dealt with by making the cast member 11 thicker, it is more efficient. Of course.

FIG. 5 and FIG. 6 show examples of the structure below the center pillar (B pillar).

As shown in FIGS. 9 and 10, the side sill outer 17 is followed by the center pillar outer 19, and the center pillar inner 20 crosses the side sill inner 18 to reach the side sill outer 17. Conventionally, a work hole 23 is formed in the center pillar inner 20 and a seat belt anchor nut 25 is provided on a rising wall 24. Here, the center pillar inner 20 has a certain height in cross section, and the height of this cross section must be reduced to the lower joint part so as to eliminate it.

5 and 6 show the side sill inner 18 and center pillar
This is an example in which the inner 20 and the portion corresponding to the rising wall 24 are integrated and thickened. Since the load from the seat belt is applied to the thick portion 26, the thick portion 26 is formed to have an appropriate plate thickness in consideration of the increase in the strength of the thick portion 26 so that it can be directly used. Since the cast member 11 has rigidity,
In some cases, ribs can be brought out and stopped by crimping. If you can't see it from the outside, you can bolt up or stop it with indirect.

The above is the part of the center pillar,
7 and 8 show an embodiment applied to the shoulder anchor 27. That is, the pillar 28 is integrally formed of the cast member 11 as shown in FIG. 8, and particularly, the portion where the seat belt mounting hole 30 is present is formed as a thick portion 29. By increasing the thickness in this way, reinforcement by another member can be eliminated. Incidentally, 31 is a seat belt fitting 3
3 is a mounting bolt, which penetrates the seat belt metal fitting 33, is inserted into the mounting hole 30, and is fastened to the mounting female screw member 32 on the back surface.

Next, an example of the structure of the side sill portion is shown in FIG.
This will be described with reference to FIG. This side sill portion corresponds to the BB cross section of FIGS. 1 and 3. For example, as for the side sill portion, as shown in FIG. 11, the floor 34 side is assembled, the side sill inner 35 is attached to the floor 34, and only the side sill outer 17 is attached to the cab side to integrate them. Therefore, the side sill inner 35
Trying to spot weld floor 34 to the belly of
It becomes the state that cannot be welded.

Therefore, FIG. 12 shows the side sill inner 3
5 is formed by the casting member 11 and the mounting projection 37 for the floor 34 is integrally formed in the middle thereof, so that the connecting portion 36 forms the connecting portion 36a between the casting member 11 and the floor 34, the casting member 11 and the side sills.・ The side sill and inner 3 are divided into two sets with the joint part 36b of the outer 17
This is to facilitate the work of joining the lower ends of the 5.

Further, in the case of FIG. 11, the joint portion 36 of the three members is
The nozzle 38 seals the
However, this work is overshadowed by brackets, etc., making it difficult to work. 13 to 15 are examples in which this problem is avoided by using the side sill inner 35 as the casting member 11. In FIG. 13, an h-shaped section 40 is formed in the lower part of the side sill inner 35, and the top end of the section 40 is joined to the floor 34. In this configuration, the joint portion 36c to which the water blocking portion 39 is to be provided is separated laterally from the joint portion 36b with the side sill outer 17, so that the sealing work by the nozzle 38 becomes easy.

In FIGS. 14 and 15, side sills
In this example, the h-shaped section 40 of the inner member 35 also serves as the floor frame under the floor. Normally, the position of this floor frame varies depending on the car, but in the present embodiment, it is integrally provided at the position of the side sill inner 35, and further, ribs 41 are provided in a wavy shape inside,
As a result, the floor frame is omitted. Further, a taller seat bracket 42 is integrally formed with the h-shaped section 40 of the side sill inner 35, and a mounting opening 43 is provided in this. Normally, when a bracket is attached, it becomes a shadow and it is very difficult to perform sealing work for water stoppage, but it has the advantage that it can be avoided and the sealing work also improves.

FIG. 16 shows an embodiment in consideration of not changing the conventional assembly structure. In the conventional assembly method described in FIG. 11, the side sill inner 35 is on the floor 3
It will not be possible to assemble it on the 4 side. Therefore, in this embodiment, as the side sill inner 35, a thin plate is placed, and the side sill reinforcement 44 integrated by casting is placed in the closed cross-section portion 10 formed with the side sill outer 17. Set it down and drop it down,
That makes up the cabside outer. In this way, by integrating the side sill inner side or the side sill reinforcement, the conventional assembly becomes possible.

Here, the inner side of the side member is used as a side sill reinforcement at the side sill portion.

FIG. 17 shows an embodiment in which the thick-walled portion 16 is the portion corresponding to the jack-up point of the side sill inner 35, that is, the abutting surface 46 used by abutting against the jack 45. Further, a relatively thick flange portion 16a is formed following the thick portion 16, and due to the fitting with the jack 45 having a U-shaped cross section, a slight lateral shift is endured by the rigidity of this flange. I am trying to get it.

In the embodiment shown in FIG. 18, the side sill outer 17 and the side sill inner 35 constitute the closed cross section 10, but the side sill inner 35 is formed integrally with the casting member 11 and is provided with a plurality of ribs 47. , Ribs 47, 47
This is an example in which another member 48 is easily coupled in between.

FIG. 19 shows an embodiment in which a harness and a hose are easily supported and stored. Here, on the premise of a structure in which the roof rail outer 49 and the roof rail inner 50 made of the cast member 11 are combined, a roof panel 13 is further provided on the outer side, and a top ceiling 51 and a trim 52 are provided on the inner side. Then, one rib 53 is attached to the internal closed cross-section portion 10 to construct a structure in which the harness and the hose are housed and supported therein.

FIG. 20 shows an embodiment in which the roof rail inner 50 is integrally molded by the cast member 11 and the thick portion 16 for attachment to the assist grip 54 is provided. The assist grip 54 is attached by screwing a mounting bolt 55 penetrating the assist grip 54 into a screw hole 56 provided in the thick portion 16. Since the screw holes 56 are formed in the roof rail inner 50 itself, this attachment is easy. Reference numeral 57 is a cap for hiding the mounting portion.

FIG. 21B shows an embodiment in which the nut portion is integrated. That is, conventionally, since the member such as trim is desired to be bottomed up as shown in (a), the nut 58 is integrated with the spreading member 12 by welding 59, but the nut 58 is integrated as shown in (b). The casting member 11 having the shaped portion 60 is used, and in this embodiment, the assist grip 54 can be easily attached by the attachment bolt 55.

[0044]

In summary, according to the present invention, the following excellent effects can be obtained.

(1) According to the first aspect, since the cab side / inner side integrated casting member including the hinge pillar portion and integrally incorporated around the side door opening is handled, deformation of the door opening is effective. Therefore, the rigidity of the body as a whole can be improved. Also, the installation accuracy of the door hinge can be secured well. Furthermore, the goodness of the monocoque structure can be taken in as well.

In addition, since the extensible member is used on the outer side, the appearance of the body is not inferior to that of the exterior, while the appearance is improved, the deformation of the door opening is effectively prevented, and the overall body rigidity (strength) is improved. ) It is possible to improve.

(2) According to a second aspect of the present invention, the casting member is provided with a mounting portion for another member (for example, a front header, a roof reinforcement, a rear header, a package tray, etc.) and an equipment mounting member (for example, a nut, a clip). It is possible to eliminate the problem that these are individually provided later by integrally molding these. Further, the continuity to other members can be improved, the binding force can be improved, and the rigidity of the body as a whole can be improved.

(3) According to the third or fourth aspect, by making the casting member or the wrought member made of a light alloy, it is possible to secure the required rigidity while reducing the weight.

[Brief description of drawings]

FIG. 1 is a development view of a cab side that is a vehicle body of an automobile according to an embodiment of the present invention.

2A and 2B show a sectional structure of each part of the cab side in FIG. 1, where (A) is an AA sectional view, (B) is a BB sectional view, and (C) is a CC sectional view. (D) is DD sectional drawing.

FIG. 3 is a development view of a cab side according to another embodiment of the present invention.

4A and 4B show a sectional structure of each part of the cab side in FIG. 3, where (A) is an AA sectional view, (B) is a BB sectional view, and (C) is a CC sectional view. (D) is DD sectional drawing.

FIG. 5 is a sectional view showing a lower part of a center pillar according to another embodiment of the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a view showing a shoulder anchor portion according to another embodiment of the present invention.

8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9 is a view showing a lower portion of a conventional center pillar.

10 is a cross-sectional view taken along the line AA of FIG. 8 of the related art.

FIG. 11 is a sectional view showing a side sill portion of the present invention.

FIG. 12 is a sectional view showing a side sill portion according to another embodiment of the present invention.

FIG. 13 is a sectional view showing a side sill portion according to still another embodiment of the present invention.

FIG. 14 is a perspective view showing a side sill portion according to another embodiment of the present invention.

15 is a sectional view taken along line BB of FIG.

FIG. 16 is a cross-sectional view showing a side sill portion according to still another embodiment of the present invention.

FIG. 17 is a sectional view showing a side sill portion according to another embodiment of the present invention.

FIG. 18 is a sectional view showing a side sill portion according to another embodiment of the present invention.

FIG. 19 is a view showing a roof rail portion according to another embodiment of the present invention.

FIG. 20 is a sectional view showing an assist grip attachment portion according to another embodiment of the present invention.

FIG. 21 is a cross-sectional view showing a configuration in which a nut according to another embodiment of the present invention is integrated, as compared with a conventional one.

[Explanation of symbols]

9 Cab side frame 10 Closed cross section 11 Casting member on inner side 12 Expanding member on outer side 13 Roof panel 14, 15 Hinge pillar reinforcement 16 Thick section 17 Side sill outer 18 Side sill inner 19 Center pillar outer 20 Center pillar inner 21 Front window 22 Rear window 23 Working hole 24 Standing wall 25 Seatbelt anchor nut 26 Thick portion 27 Shoulder anchor 28 Pillar 29 Thick portion 30 Seatbelt mounting hole 31 Mounting bolt 32 Mounting female screw member 33 Seat belt bracket 34 Floor 35 Side sill inner 36, 36a, 36b, 36c Joining part 37 Mounting protrusion 38 Nozzle 39 Water stop part 40 Cross section h-shaped part 41 Rib 42 Seat bracket 43 Mounting Aperture 44 Side Sill Reinforcement 45 Jack 46 Abutting Surface 47 Rib 48 Other Member 49 Roof Rail Outer 50 Roof Rail Inner 51 Top Sealing 52 Trim 53 Rib 54 Assist Grip 55 Mounting Bolt 56 Screw Hole 57 Cap 58 Nut 59 Welding 60 parts

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masahiro Osumi, No. 3 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (72) Risuke Nakanishi No. 3 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Stock In the company

Claims (4)

[Claims] 1. A monocoque structure having a closed cross section is formed by a casting member integrated with a cab side and an inner side, which integrally incorporates around a side door opening including a hinge pillar portion, and a spreading member on an outer side. A car body structure characterized by the following. 2. The vehicle body structure for an automobile according to claim 1, wherein at least one of the mounting portion of the other member and the equipment mounting member is integrally molded with the casting member. 3. The vehicle body structure for an automobile according to claim 1, wherein the casting member is made of a light alloy. 4. The vehicle body structure for an automobile according to claim 1, wherein the wrought member is made of a light alloy.