WO2014007005A1

WO2014007005A1 - Automobile cabin formed from frp

Info

Publication number: WO2014007005A1
Application number: PCT/JP2013/065069
Authority: WO
Inventors: 正太郎鮎澤
Original assignee: 本田技研工業株式会社
Priority date: 2012-07-02
Filing date: 2013-05-30
Publication date: 2014-01-09
Also published as: JP2015186928A

Abstract

An automobile cabin formed from FRP is configured in such a manner that steering hanger support members (112), which support ends of a steering hanger (111) extending in the width direction of the vehicle, are affixed to the rear walls (33a) of front pillar lower front sections (33), and in such a manner that front pillar lower rear sections (34), which integrally have front pillar upper sections (35), are joined to the front pillar lower front sections (33) and to the steering hanger support members (112). As a result, the front pillar lower front section (33), the front pillar lower rear section (34), and the steering hanger support member (112), which are connected to each other, reinforce each other and increase the strength of the front pillars. This not only improves the anti-collision performance but also increases the supporting rigidity of the steering hanger support members (112) relative to the front pillars of the cabin formed from the CFRP. Consequently, the supporting rigidity of the steering hanger (111) is increased.

Description

Car FRP cabin

The present invention relates to an FRP cabin for an automobile in which an FRP cabin includes at least a side sill and a front pillar lower front portion standing from the front end of the side sill.

Patent Document 1 below discloses a technique in which a fixed portion of a steering beam (steering hanger) is reinforced with a lean force beam steering and a patch when the end portion of a steering beam (steering hanger) is fixed to a front pillar of a monocoque body made of a steel plate of an automobile. It is.

In addition, a collar is placed between the outer panel and inner panel of the front pillar of the monocoque body made of steel plate of the automobile, and a bracket is fixed to the inner surface in the vehicle width direction of the inner panel with bolts inserted through the collar. The one that supports the outer end in the direction is known from Patent Document 2 below.

Japanese Patent No. 4616015 Japanese Patent No. 4455529

By the way, when the end of the steering hanger is supported on the front pillar lower of the cabin of an automobile made of CFRP (carbon fiber reinforced resin), a steering hanger support member is provided inside the front pillar lower in order to increase the support rigidity of the steering hanger. It is conceivable to fix and fix the end of the steering hanger to the steering hanger support member. In this case, if the strength of the front pillar can be increased by using the steering hanger support member, the front pillar lower can be prevented from collapsing when the collision load of the front collision is input, and the collision resistance performance can be improved.

The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to increase the support rigidity of the steering hanger with respect to the front pillar of the CFRP cabin, and to improve the anti-collision performance by increasing the strength of the front pillar itself. .

In order to achieve the above object, according to the present invention, an FRP cabin is an FRP cabin for an automobile including at least a side sill and a front pillar lower front portion standing up from a front end of the side sill, A steering hanger support member that supports an end portion of a steering hanger that extends in the vehicle width direction is fixed to the rear wall of the front pillar lower front portion, and the front pillar lower rear portion that integrally has a front pillar upper is connected to the front pillar lower front portion and the front pillar lower front portion. An FRP cabin of an automobile characterized in that it is coupled to a steering hanger support member is proposed.

According to the invention, in addition to the first feature, a reinforcing plate having a nut is disposed on the inner surface of the rear wall of the front part of the front pillar lower, and the bolt penetrates the steering hanger support member from the rear to the front. The FRP cabin of an automobile having the second feature that the steering hanger supporting member is fastened to the rear wall of the front pillar lower front by screwing the nut to the nut is proposed.

According to the present invention, in addition to the first or second feature, the front pillar lower rear portion is formed of an L-shaped metal panel having a side wall and a rear wall, and the side wall of the front pillar lower rear portion is A FRP cabin of an automobile is proposed, which is connected to the side wall of the front pillar lower front part and the side wall of the rear part of the front pillar lower part and the lower end of the rear wall are connected to the side wall and upper wall of the side sill. The

Further, according to the present invention, in addition to the third feature, there is proposed an FRP cabin of an automobile characterized in that a door hinge is fastened to the steering hanger support member with the front pillar lower rear portion interposed therebetween. The

According to the invention, in addition to any one of the first to fourth features, a flange is extended rearward from the inner end in the vehicle width direction of the rear wall of the rear portion of the front pillar lower, and the steering hanger support member is provided. A FRP cabin of an automobile having a fifth feature that is fastened to the flange is proposed.

According to the present invention, in addition to any one of the first to fifth features, the steering hanger support member bends the metal plate into a square tube shape and joins the flanges at both ends, thereby The front wall of the front pillar lower portion is formed of a rectangular cross section having an outer wall in the vehicle width direction, a rear wall, and an inner wall in the vehicle width direction, and protrudes inward in the vehicle width direction from the front wall. The FRP cabin of an automobile is proposed in which the outer wall in the vehicle width direction and the inner wall in the vehicle width direction are connected by a collar.

The rear flange 34d of the embodiment corresponds to the flange of the present invention, the small diameter collar 113 and the large diameter collar 114 of the embodiment correspond to the collar of the present invention, and the weld nut 116 of the embodiment corresponds to the collar of the present invention. Corresponds to the nut.

According to the first feature of the present invention, an FRP cabin of an automobile includes at least a side sill and a front pillar lower front portion standing from the front end of the side sill. A steering hanger support member that supports the end portion of the steering hanger extending in the vehicle width direction is fixed to the rear wall of the front portion of the front pillar lower portion, and the front pillar lower portion including the front pillar upper is integrated with the front pillar lower portion and the steering hanger. Since it is connected to the support member, the front pillar lower front part, front pillar lower rear part, and steering hanger support member that are connected to each other reinforce each other, so that the strength of the front pillar is increased and the collision resistance performance is improved. The support rigidity of the steering hanger can be increased by increasing the support rigidity of the steering hanger support member with respect to the front pillar.

According to the second feature of the present invention, a reinforcing plate having a nut is disposed on the inner surface of the rear wall of the front part of the front pillar lower, and a bolt that penetrates the steering hanger support member from the rear to the front is screwed into the nut. Thus, since the steering hanger support member is fastened to the rear wall of the front pillar lower front portion, the steering hanger support member can be firmly fixed to the rear wall of the front pillar lower front portion.

According to the third feature of the present invention, the front pillar lower rear portion is made of an L-shaped cross-section metal panel having a side wall and a rear wall, so that not only the rigidity of the front pillar lower rear portion itself is increased, but also the front pillar lower Since the rear rear side wall is connected to the front pillar lower front side wall, and the front pillar lower rear side wall and the lower end of the rear wall are connected to the side sill side wall and upper wall, the front pillar lower rear part is connected to the front pillar lower front part and It can be connected to both side sills to increase the strength of the front pillar.

According to the fourth aspect of the present invention, since the door hinge is fastened to the steering hanger support member with the front pillar lower rear portion interposed therebetween, the front pillar lower front portion and the front pillar lower rear portion are integrated through the steering hanger support member. In addition to improving the strength, the door hinge can be fastened to the steering hanger support member and firmly supported.

According to the fifth aspect of the present invention, the flange is extended rearward from the inner end in the vehicle width direction of the rear wall of the rear portion of the front pillar lower portion, and the steering hanger support member is fastened to the flange. By integrating the rear part of the pillar lower, the coupling strength of the front pillar lower front part and the front pillar lower rear part can be increased.

According to the sixth aspect of the present invention, the steering hanger support member is formed by bending the metal plate into a square tube shape and joining the flanges at both ends, thereby connecting the front wall, the vehicle width direction outer wall, the rear wall, and the vehicle width direction. Since it is formed in the rectangular cross section which has an inner wall, a steering hanger support member can be comprised in a box shape with a simple structure, and rigidity can be improved. In addition, the flange and front wall projecting inward in the vehicle width direction from the front wall are fastened to the rear wall of the front pillar lower front part, so that the steering hanger support member can be firmly fixed to the front pillar lower front part. Since the outer wall in the vehicle width direction and the inner wall in the vehicle width direction of the steering hanger support member are connected by the collar, the rigidity of the steering hanger support member can be further increased.

FIG. 1 is a perspective view of a CFRP cabin of an automobile. (First embodiment) FIG. 2 is an enlarged view of part 2 of FIG. (First embodiment) FIG. 3 is a view in the direction of arrows 3 in FIG. (First embodiment) FIG. 4 is a view in the direction of arrows 4 in FIG. (First embodiment) 5 is a cross-sectional view taken along line 5-5 of FIG. (First embodiment)

11 cabin 22 side sill 22a upper wall 22b side wall 33 front pillar lower front part 33a rear wall 33b side wall 34 front pillar lower rear part 34a side wall 34b rear wall 34d rear flange (flange)
35 Front pillar upper 111 Steering hanger 112 Steering hanger support member 112a Front wall 112b Car width direction outer wall 112c Rear wall 112d Car width direction inner wall 112e Flange 112f Flange 113 Small diameter collar (color)
114 Large diameter color (color)
115 Reinforcing plate 116 Weld nut (nut)
117 Bolt 121 Door Hinge

Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that the front-rear direction, the left-right direction (vehicle width direction), and the up-down direction in this specification are based on the driver seated in the driver's seat.

First embodiment

As shown in FIG. 1, the body frame of an automobile is a cabin 11 formed in a bathtub shape with carbon fiber reinforced resin (CFRP), and a pair of left and right suspension support modules that are cast parts of an aluminum alloy connected to the front end of the cabin 11. 12, 12, a pair of left and right front side

frame front parts

13, 13 made of an aluminum alloy extruded material that extends forward from the front ends of the

suspension support modules

12, 12, and the front ends of the front side

frame front parts

13, 13. A front end module 14 made of CFRP, a pair of left and right CFRP

lower members

15, 15 extending from the left and right ends of the front end module 14, and a rear upper portion of the

lower members

15, 15 extending rearward and upward. A pair of left and right CFRP connected to the front end Comprises a

Ppamenba

16, 16, the roll bar 17 made of CFRP erected on the upper rear surface of the cabin 11, a CFRP-made left and right pair of

stays

18 and 18 for reinforcing supporting the roll bar 17 from the rear.

The cabin 11 has a hollow structure in which an inner skin 19 and an outer skin 20 are joined up and down, a dash panel 21 at the front end, a pair of left and

right side sills

22, 22 extending rearward from both ends of the dash panel 21 in the vehicle width direction, and a side sill 22. 22, a pair of left and right

rear side frames

23, 23 extending rearward and upward from the rear end, a rear end cross member 24 connecting the rear ends of the

rear side frames

23, 23 in the vehicle width direction, a dash panel 21 and left and

right side sills

22 , 22, a kick-up portion 26 rising from the rear end of the front floor panel 25, and extending rearward from the upper end of the kick-up portion 26 to connect to the

rear side frames

23, 23 and the rear end cross member 24. And a rear floor panel 27.

Inner skin 19 and outer skin 20 constituting cabin 11 have joining

flanges

19a and 20a extending so as to surround the outer peripheries of dash panel 21, left and

right side sills

22 and 22, left and right

rear side frames

23 and 23, and rear end cross member 24. The both joining

flanges

19a and 20a are joined by adhesion, welding, rivets or the like.

The front end module 14 includes a bumper beam 28 extending in the vehicle width direction, and a pair of left and right bumper beam extensions that extend rearward from both ends of the bumper beam 28 in the vehicle width direction and are connected to the front ends of the front side frame

front portions

13 and 13. 29 and 29 and a frame-shaped front bulkhead 30 supported between the

bumper beam extensions

29 and 29. Each suspension support module 12 includes a front side frame rear portion 31 connected to the rear end of the front side frame front portion 13 and the front surface of the dash panel 21, and extends outward and upward in the vehicle width direction from the front side frame rear portion 31. A damper housing 32 connected to the front surface of the dash panel 21 is integrally provided. The left and right end portions of the dash panel 21 constitute a pair of left and right front pillar lower

front portions

33 and 33 that rise upward from the front ends of the

side sills

22 and 22. A pair of left and right metal front pillar lower

rear portions

34 and 34 and a pair of left and right metal

front pillar uppers

35 and 35 are connected to the rear surfaces of the front pillar lower

front portions

33 and 33, and the left and right

front pillar uppers

35 and 35 are connected to each other. The upper ends are connected by a metal front roof arch 36 extending in the vehicle width direction.

The dash panel 21 includes an inclined wall 37 that extends obliquely upward from the front end of the front floor panel 25, and a vertical wall 38 that extends upward from the front end of the inclined wall 37. A floor tunnel 39 extending in the front-rear direction protrudes upward from the center in the vehicle width direction of the inner skin 19 and the outer skin 20 constituting the inclined wall 37 of the dash panel 21 and the upper and lower surfaces of the front floor panel 25. Further, a front cross member 40 and a rear cross member 41 that extend in the vehicle width direction intersecting the floor tunnel 39 bulge upward from the inner skin 19 constituting the upper surface of the front floor panel 25. On the other hand, in the rear floor panel 27, the inner skin 19 and the outer skin 20 are both formed flat.

Next, a structure for supporting both ends of the steering hanger 111 in the vehicle width direction between the left and right front pillar lower

front portions

33 and 33 will be described with reference to FIGS.

The steering hanger 111 is composed of a pipe member having a circular cross section disposed in the vehicle width direction along the rear surface of the vertical wall 38 of the dash panel 21 (see FIG. 2), and a steering shaft (not shown) is supported there. Both ends of the steering hanger 111 in the vehicle width direction are supported by left and right steering

hanger support members

112 and 112 fixed to the left and right front pillar lower

front portions

33 and 33.

The steering hanger support member 112 is formed in a rectangular cross-sectional box shape including a front wall 112a, a vehicle width direction outer wall 112b, a rear wall 112c, and a vehicle width direction inner wall 112d by bending a metal plate (see FIG. 4). 112a and

flanges

112e and 112f connected to the vehicle width direction inner wall 112d are overlapped with each other. The vehicle width direction outer wall 112b and the vehicle width direction inner wall 112d of the steering hanger support member 112 are connected and reinforced in the vehicle width direction by three small diameter collars 113 and one large diameter collar 114. The end portion of the steering hanger 111 is fixed to the inner wall 112d in the vehicle width direction of the steering hanger support member 112.

The inner skin 19 constituting the rear half of the front pillar lower front portion 33 includes a rear wall 33a that rises forward and upward from the upper wall 22a of the side sill 22, and

side walls

33b and 33c that extend forward from the left and right side edges of the rear wall 33a. A reinforcing plate 115 made of a flat metal plate is disposed on the front surface of the rear wall 33a (see FIG. 4). Five weld nuts 116 are provided on the front surface of the reinforcing plate 115. Two weld nuts 116... Penetrate through the front wall 112 a of the steering hanger support member 112, the rear wall 33 a of the front pillar lower front portion 33, and the reinforcing plate 115. The

bolts

117 and 117 are screwed into the two

weld nuts

116 and 116, and the three bolts passing through the

flanges

112 e and 112 f of the steering hanger support member 112, the rear wall 33 a of the front pillar lower front portion 33, and the reinforcing plate 115. The steering hanger support member 112 is fastened to the front pillar lower front portion 33 by screwing 117 to three weld nuts 116.

The front pillar lower rear portion 34 made of a metal panel having an L-shaped cross section as a whole includes a side wall 34a extending in the front-rear direction, a rear wall 34b extending inward in the vehicle width direction from the rear end of the side wall 34a, and a front end of the side wall 34a. A front flange 34c extending forward, a rear flange 34d extending rearward from the inner end in the vehicle width direction of the rear wall 34b, and a lower flange 34e obtained by bending the lower ends of the side wall 34a and the rear wall 34b (FIGS. 2 and 5) reference). The front flange 34c of the front pillar lower rear portion 34 is bonded to the side wall 33b of the front pillar lower front portion 33, and the lower flange 34e of the front pillar lower rear portion 34 is bonded to the upper wall 22a and the side wall 22b of the side sill 22.

A mounting bracket 118 extending rearward is welded to the rear wall 112c of the steering hanger support member 112 (see FIGS. 3 to 5), and the rear end 34d of the rear flange 34d of the front pillar lower rear portion 34 is bolted to the mounting bracket 118. Fastened with 119 and nut 120. When the front pillar lower rear portion 34 is attached in this manner, the front pillar lower rear portion 34 firmly integrates the front pillar lower front portion 33, the steering hanger support member 112, and the

side sills

22, 22.

A pair of upper and lower door hinges 121 and 121 for pivotally supporting the front door are fixed to the outer surface in the vehicle width direction of the side wall 34a of the front pillar lower rear portion 34 (see FIGS. 2, 3 and 5). That is, the upper door hinge 121 includes two weld nuts 123 provided with two

bolts

122, 122 penetrating the side wall 34a of the front pillar lower rear portion 34 on the rear surface of the outer wall 112b in the vehicle width direction of the steering

hanger support member

112, 123, and the lower door hinge 121 is fixed to the outer wall of the steering hanger support member 112 in the vehicle width direction with three bolts 122 passing through the side wall 34a and the rear wall 34b of the front pillar lower rear portion 34. It is fixed by screwing into three weld nuts 123 provided on the back surfaces of 112b and the rear wall 112c.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

A front pillar lower front portion 33 made of CFRP is integrally formed so as to connect the dash panel 21 and the side sill 22, and a front flange 34 of the front pillar lower rear portion 34 is formed on a side wall 33 b of the front pillar lower front portion 33. Further, the lower flange 34e of the front pillar lower rear portion 34 is bonded to the upper wall 22a and the side wall 22b of the side sill 22 (see FIG. 2). Accordingly, the front pillar lower front portion 33 and the front pillar lower rear portion 34 are integrated to form a front pillar lower, and the front pillar lower front portion 33 is more firmly connected to the side sill 22 via the front pillar lower rear portion 34. This increases the strength of the front pillar lower. In particular, since the front pillar lower rear portion 34 is made of an L-shaped metal panel having a side wall 34a and a rear wall 34b, the front pillar lower rear portion 34 itself has high rigidity, and the front pillar lower front portion 33 and the front pillar lower portion are also made. The rigidity of the front pillar lower integrated with the rear portion 34 is effectively increased.

Further, a reinforcing plate 115 having weld nuts 116 is arranged on the inner surface of the rear wall 33a of the front pillar lower front portion 33, and bolts 117 passing through the steering hanger support member 112 from the rear to the front are passed through the reinforcing plate 115. Since the weld nuts 116 are screwed together (see FIG. 4), the steering hanger support member 112 can be firmly fixed to the rear wall 33a of the front pillar lower front portion 33. And since the both ends of the steering hanger 111 extended in the vehicle width direction were supported by the left and right steering

hanger support members

112, 112, the steering hanger 111 can be firmly supported.

The steering hanger support member 112 has a front wall 112a, a vehicle width direction outer wall 112b, a rear wall 112c, and a vehicle width direction inner wall 112d by bending a metal plate into a square tube shape and joining

flanges

112e and 112f at both ends. Since it is formed in a rectangular cross section (see FIG. 4), the steering hanger support member 112 can be configured in a box shape with a simple structure to increase rigidity. Further, since the

flanges

112e and 112f projecting inward in the vehicle width direction from the front wall 112a and the front wall 112a are fastened to the rear wall 33a of the front pillar lower front portion 33, the steering hanger support member 112 is attached to the front pillar lower front portion 33. Further, since the outer wall 112b in the vehicle width direction and the inner wall 112d in the vehicle width direction of the steering hanger support member 112 are connected by the small diameter collar 113 ... and the large diameter collar 114, the rigidity of the steering hanger support member 112 can be further increased. Can be increased.

Further, a mounting bracket 118 projecting rearward from the rear wall 112c of the steering hanger support member 112 is fastened to the rear flange 34d of the front pillar lower rear portion 34 with bolts 119 and nuts 120, and bolts 122 for fastening the door hinges 121, 121 to each other. Is passed through the front pillar lower rear portion 34 and the steering hanger support member 112 and screwed into the weld nut 123..., So that the steering hanger support member 112 and the front pillar lower rear portion 34 are firmly integrated to provide a steering hanger for the front pillar lower. Not only can the support rigidity of the support member 112 be further increased, but the door hinges 121 and 121 are fastened not only to the front pillar lower rear portion 34 but also to the steering hanger support member 112. Support rigidity of the

hinge

121, 121 is also improved.

Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.

For example, although the cabin 11 and the like are made of CFRP in the embodiment, they may be made of FRP (fiber reinforced resin) using fibers other than carbon fibers.

Claims

The FRP cabin (11) is an FRP cabin for an automobile including at least a side sill (22) and a front pillar lower front portion (33) standing up from the front end of the side sill (22),
A steering hanger support member (112) that supports the end of the steering hanger (111) extending in the vehicle width direction is fixed to the rear wall (33a) of the front pillar lower front portion (33), and the front pillar upper (35) is fixed. An FRP cabin of an automobile, characterized in that a front pillar lower rear portion (34) integrally formed is coupled to the front pillar lower front portion (33) and the steering hanger support member (112).
A reinforcing plate (115) having a nut (116) is disposed on the inner surface of the rear wall (33a) of the front pillar lower front portion (33), and a bolt (piercing through the steering hanger support member (112) from the rear to the front ( The steering hanger support member (112) is fastened to the rear wall (33a) of the front pillar lower front portion (33) by screwing the nut (116) to the nut (116). The FRP cabin of the automobile described in 1.
The front pillar lower rear part (34) is made of an L-shaped metal panel having a side wall (34a) and a rear wall (34b), and the side wall (34a) of the front pillar lower rear part (34) is connected to the front pillar lower front part. The side wall (33b) of the front pillar lower part (34) is connected to the side wall (33b) of the part (33), and the lower end of the side wall (34a) and the rear wall (33b) of the front pillar lower part is connected to the side wall (22b) and the upper wall (22a) The FRP cabin of an automobile according to claim 1 or 2, wherein
The FRP cabin of an automobile according to claim 3, wherein a door hinge (121) is fastened to the steering hanger support member (112) with the front pillar lower rear part (34) interposed therebetween.
A flange (34d) is extended rearward from the inner end of the rear wall (34b) of the front pillar lower rear portion (34) in the vehicle width direction, and the steering hanger support member (112) is fastened to the flange (34d). The automobile FRP cabin according to any one of claims 1 to 4, wherein the cabin is made of FRP.
The steering hanger support member (112) is formed by bending a metal plate into a square tube shape and joining flanges (112e, 112f) at both ends, thereby allowing a front wall (112a), a vehicle width direction outer wall (112b), a rear wall ( 112c) and a vehicle-width-direction inner wall (112d) having a rectangular cross-section and projecting inward in the vehicle-width direction from the front wall (112a) and the flange (112e, 112f) and the front wall (112a) Fastened to the rear wall (33a) of the front pillar lower front portion (33), and the vehicle width direction outer wall (112b) and the vehicle width direction inner wall (112d) are connected by a collar (113, 114). The FRP cabin of an automobile according to any one of claims 1 to 5.