JP6255809B2 - Body front structure - Google Patents

Description

The present invention relates to a front body structure of a vehicle body .

  In recent years, in order to improve the design of a bus, there is a demand for forming an inclined portion, a curved surface portion or the like on the upper front portion of the body. The inventor of the present application examined the vehicle body structure of the bus in order to meet such demands, and extended the front part of the bus to the rear rather than the vehicle body without the inclined part, etc. Open). According to this vehicle body structure, the shape of the front surface portion can be freely set without greatly changing other assemblies such as a roof assembly.

JP 2001-138948 A

  However, as shown in FIG. 4, since the front collar 31 formed at the rear end of the front surface portion 30 is moved rearward than the case where the inclined portion or the like is not formed, the front collar 31 is separated from the A pillar 32. As a result, there is a problem that it is not easy to ensure strength and rigidity.

  As a method for solving such a problem, a method in which the A pillar 32 on both sides in the vehicle width direction and the front flange 31 between the A pillars 32 are formed by pressing a single cylindrical material is considered. There is a problem that a mold is necessary, and a custom-made product such as a bus is expensive.

An object of the present invention is to provide a vehicle body front portion structure that can increase the strength and rigidity of the vehicle body front portion at low cost.

  In order to achieve the above-mentioned object, the front structure of the bus of the present invention has A pillars formed on both sides in the vehicle width direction so as to form a skeleton of the front surface of the bus, and the A structure. A front bridging member formed above and behind the pillar and extending in the vehicle width direction, and a bone joint for connecting the A pillar and the front bridging member formed in a closed cross-section by joining a plurality of steel plates in a box shape. In addition.

  The bone joint portion may include a rear extending skeleton portion extending rearward from the upper end portion of the A pillar, and an upper extending skeleton portion extending from the rear end portion of the rear extending skeleton portion to the front saddle member.

  The rear extension skeleton part includes the A pillar, a front structural plate joined to the outside of the A pillar and the front saddle member, a plurality of rib plates joined to the front structural plate, and the A It may be formed in a box-shaped closed cross-section using a pillar and a structural cover plate joined to the passenger compartment side of the rib plate.

  In the upper extension skeleton part, the front saddle member, a structural bending plate formed in a U-shaped cross section and having one end joined to the front saddle member and the other end joined to the rear extension skeleton part, The structural lid plate may be used, and the structural lid plate may be joined to the structural bending plate so as to close a U-shaped opening and to the front saddle member.

According to the vehicle body front portion structure of the present invention, the strength and rigidity of the vehicle body front portion can be increased at low cost.

It is a perspective view which shows the front-surface part structure of the bus | bath which concerns on one embodiment of this invention. It is a principal part side view of the bus | bath shown in FIG. FIG. 3 is a front view of main parts of the bus shown in FIG. 2. It is a perspective explanatory view of the front part structure of a bus under development.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the body 2 of the bus 1 includes a front assembly 3 that constitutes a front portion in the traveling direction and a roof assembly 4 that constitutes a ceiling portion.

  The front assembly 3 includes a front surface portion 5 that forms the front surface of the bus 1 and a side wall portion 6 that is formed integrally with the rear portion of the front surface portion 5.

  The front part 5 is arranged on both sides in the vehicle width direction so as to form a skeleton, and extends in the vertical direction. The front pillar 7 is formed above the A pillar 7 and rearward and extends in the vehicle width direction. A material 8, a front structural plate 9 joined to the vehicle exterior side of the A pillar 7 and the front collar 8, and a bone joint 10 connecting the A pillar 7 and the front collar 8 are provided.

  The A pillar 7 has a lower end joined to a frame 11 (see FIG. 3) under the floor and extends to the vicinity of the upper end of the front surface portion 5. A front window 12 is provided between the A pillars 7.

  The front collar 8 is formed at the upper rear end of the front surface portion 5. The front collar 8 is formed in a cylindrical shape having a rectangular cross section and is shorter than the dimension between the A pillars 7. The front saddle member 8 is bent so as to swell upward following the shape of the roof assembly 4.

  The front structural plate 9 is made of steel. The front structural plate 9 is bent so as to follow the shape of the front surface of the body. Specifically, the front structural plate 9 is bent so that a portion above the A pillar 7 is directed toward the center in the vehicle width direction, and is formed in a curved shape. The end of the material 8 on the vehicle outer side is smoothly connected with a curved surface.

  The bone joint portion 10 connects the upper end portion of the A pillar 7 and the end portion of the front saddle member 8 with a closed cross-sectional structure. The bone joint 10 is formed in a closed cross section by joining a plurality of steel plates including the front structural plate 9 in a box shape. Specifically, the bone joint portion 10 includes a plurality of rib plates 14 a, 14 b, 14 c for forming a rear extension skeleton portion 13 extending rearward from the upper end portion of the A pillar 7, and a rear end portion of the rear extension skeleton portion 13. A structural bending plate 16 for forming an upwardly extending skeleton portion 15 extending from the front to the front saddle member 8 and a structural lid plate 17 for making the rearward extending skeleton portion 13 and the upwardly extending skeleton portion 15 into a closed cross-sectional structure. Prepare.

  The rib plates 14a, 14b and 14c are made of steel plates formed in a rectangular shape. Each of the rib plates 14 a, 14 b, and 14 c is joined over the entire length to the vehicle interior side surface 18 of the front structural plate 9 and intersects the front structural plate 9 at a right angle. Specifically, the rib plates 14a, 14b, and 14c include a first rib plate 14a whose front end edge is joined to the top of the A pillar 7 over the entire length, and a rear end of the A pillar 7 that extends over the entire length. A second rib plate 14b that is joined to the end surface 19 and disposed below the A pillar 7, and a front surface is joined to the rear end edge of the first rib plate 14a over the entire length and the rear of the second rib plate 14b. There is a third rib plate 14c joined to the end edge over the entire length. The first rib plate 14a, the second rib plate 14b, and the third rib plate 14c are formed to have the same dimension in the vehicle width direction. That is, the 1st rib board 14a, the 2nd rib board 14b, and the 3rd rib board 14c are assembled | attached to the box shape by which the vehicle interior side was open | released.

  The structural bending plate 16 is formed of a steel plate formed in a U-shaped cross section and extending in a direction in which the U-shaped cross section continues. The structural bending plate 16 is inserted into the front collar 8 at one end in the longitudinal direction and joined to the front collar 8. The structural bending plate 16 may cover the outer periphery of the front collar 8 and be joined to the front collar 8. Further, the structural bending plate 16 may be one in which one end edge in the longitudinal direction is joined to the end of the front saddle member 8 over the entire length. The structural bending plate 16 is disposed such that the U-shaped opening 20 faces the vehicle interior side. Further, the structural bending plate 16 extends outward from the end portion of the front saddle member 8 in the vehicle width direction and is bent downward along the front structural plate 9. The other end of the structural bending plate 16 is joined to the upper surface of the first rib plate 14a over the entire length. As a result, a box-shaped space is formed on the inner side of the U-shape of the structural bending plate 16 so that the passenger compartment side is open. Further, flanges 21 extending outward in the width direction of the opening 20 are formed on both sides of the opening 20 of the structural bending plate 16. The structural bending plate 16 may not have the flange 21.

  The structural lid plate 17 is provided at the edge of the A pillar 7 and each rib plate 14a, 14b, 14c on the vehicle compartment side so as to close a box-shaped space formed by the A pillar 7 and the rib plates 14a, 14b, 14c. At the same time, it is joined to the front flange 8 and the flange 21 of the structural bending plate 16 so as to close the box-shaped space formed inside the structural bending plate 16. As a result, the A pillars 7 on both sides of the body 2 and the front saddle member 8 are connected via the rear extension skeleton 13 and the upper extension skeleton 15 of the closed cross-sectional structure, and as shown in FIG. An arched skeleton 22 is formed. When the structural bending plate 16 does not have the flange 21, the structural lid plate 17 is preferably joined to the edge of the structural bending plate 16 on the vehicle compartment side so as to close the U-shaped opening 20.

  The side wall portion 6 includes a side wall aggregate 23 extending in the front-rear direction, a ceiling support aggregate 25 provided on the side wall aggregate 23 for receiving a longitudinal aggregate 24 of the roof assembly 4 described later, the side wall aggregate 23 and the ceiling. A side wall structure plate 26 provided outside the support aggregate 25. The front end of the side wall aggregate 23 is joined to the A pillar 7. The ceiling support aggregate 25 is made of a steel material having a U-shaped cross section, and is arranged so that the U-shaped opening faces the side wall structure plate 26 side. The ceiling support aggregate 14 is disposed close to the front collar 8 in the front-rear direction.

  The roof assembly 4 includes a longitudinal frame 24 formed on the lower edges of both sides and extending in the front-rear direction, a roof frame 27 formed on the upper front end and extending in the vehicle width direction, and a roof frame 27 provided on the longitudinal frame 24. And a roof plate portion 29 that is provided outside the longitudinal frame 24 and the roof collar 27 and forms a roof.

  In addition, although the back extension frame | skeleton part 13 and the upper extension skeleton part 15 shall be formed in a box shape, a box shape here does not limit a shape. For example, the post-frame part 13 may be formed in a box shape having a polygonal cross section. That is, the rear extension skeleton part 13 and the upper extension skeleton part 15 may be formed in a closed cross-sectional structure by further adding other members such as plates. Moreover, although the upper extension frame part 15 shall be formed using the structural bending board 16, it is formed combining a flat steel plate (not shown) like the rear extension frame part 13. FIG. There may be.

  Next, the operation of this embodiment will be described.

  When the bone joint 10 is provided between the A pillar 7 and the front flange 8, the structural bending plate 16 is inserted into the front flange 8, and the front flange 8 and the structural bending plate 16 are joined by welding or the like. To do. Further, the first rib plate 14a, the second rib plate 14b, and the third rib plate 14c are joined to the front structural plate 9 by welding or the like, and the first rib plate 14a and the structural bending plate 16 are welded or the like. And join. At this time, the order in which the structural bending plate 16 and the rib plates 14a, 14b, and 14c are attached is arbitrary, and may be determined by the ease of processing. For example, after the first rib plate 14a, the second rib plate 14b, and the third rib plate 14c are joined in advance to form a unit (not shown), this unit may be joined to the front structural plate 9.

  Thereafter, a structural cover plate is provided on the edge of the A pillar 7 and each of the rib plates 14a, 14b, 14c on the passenger compartment side so as to close the box-shaped space formed by the A pillar 7 and the rib plates 14a, 14b, 14c. 17 and the structural lid plate 17 are joined to the front flange 8 and the flange 21 of the structural bending plate 16 so as to close the box-shaped space formed inside the structural bending plate 16.

  Thereby, the A pillar 7 and the front saddle member 8 are firmly connected with a continuous closed cross-sectional structure, and the strength and rigidity of the front surface portion 5 can be easily secured.

  As described above, the A pillars 7 formed on both sides in the vehicle width direction so as to form the skeleton of the front portion 5 of the bus 1, and formed on the front portion 5 and above and behind the A pillar 7 and in the vehicle width direction. And a front joint 5 which is formed in a closed cross-section by joining a plurality of steel plates in a box shape and which connects the A pillar 7 and the front joint 8. The strength and rigidity can be easily increased. Further, the cost can be reduced as compared with the case where the A pillar 7 and the front flange member 8 are formed by pressing one cylindrical member.

  Further, the bone joint portion 10 includes a rear extending skeleton portion 13 extending rearward from the upper end portion of the A pillar 7 and an upper extending skeleton portion 15 extending from the rear end portion of the rear extending skeleton portion 13 to the front collar 8. Therefore, the A pillar 7 and the front collar 8 can be connected regardless of the body shape above the A pillar 7 and in front of the front collar 8.

  The rear extension skeleton 13 includes an A pillar 7, a front structural plate 9 joined to the outside of the A pillar 7 and the front saddle member 8, and a plurality of rib plates 14 a and 14 b joined to the front structural plate 9. , 14c and the structural lid plate 17 joined to the passenger compartment side of the A pillar 7 and the rib plates 14a, 14b, 14c are formed into a box-shaped closed cross-sectional shape, so that a strong closed cross-sectional structure is obtained. It can be obtained inexpensively with a simple structure. In particular, since the existing front structural plate 9 is used, a closed cross-sectional structure can be formed efficiently.

  The upper extension skeleton 15 includes a front saddle member 8 and a structural bending plate 16 which is formed in a U-shaped cross section and has one end joined to the front saddle member 8 and the other end joined to the rear extension skeleton 13. The structural lid plate 17 is used, and the structural lid plate 17 is joined to the structural bending plate 16 so as to close the U-shaped opening 20 and is joined to the front saddle member 8. Even when the upper portion of the plate 9 is formed in a complicated shape, the front saddle member 8 and the rear extension frame portion 13 can be reliably connected with a closed cross-sectional structure.

DESCRIPTION OF SYMBOLS 1 Bus 5 Front part 7 A pillar 8 Front collar 9 Front structural board 10 Bone joint part 13 Back extension skeleton part 14a Rib board 14b Rib board 14c Rib board 15 Extension skeleton part 16 Structural bending board 17 Structural cover board

Claims (4)

A pillars formed on both sides in the vehicle width direction so as to form a skeleton of the vehicle body front portion, and a front saddle member formed on the front portion and formed above and behind the A pillar and extending in the vehicle width direction. further comprising a Honetsugi portion is formed in the closed cross-section for connecting the front ribs and the a-pillar,
The bone joint portion includes a rear extending skeleton portion extending rearward from an upper end portion of the A pillar, and an upper extending skeleton portion extending from the rear end portion of the rear extending skeleton portion to the front saddle member. Body front structure. The vehicle body front portion structure according to claim 1, wherein the bone joint portion is formed in a closed cross-section by joining a plurality of steel plates in a box shape . The rear extension skeleton part includes the A pillar, a front structural plate joined to the outside of the A pillar and the front saddle member, a plurality of rib plates joined to the front structural plate, and the A The vehicle body front part structure according to claim 2, wherein the structure is formed in a box-shaped closed cross-section using a pillar and a structural cover plate joined to the passenger compartment side of the rib plate. In the upper extension skeleton part, the front saddle member, a structural bending plate formed in a U-shaped cross section and having one end joined to the front saddle member and the other end joined to the rear extension skeleton part, The vehicle body according to claim 3, wherein the structural lid plate is used, and the structural lid plate is joined to the structural bending plate so as to close a U-shaped opening and is joined to the front saddle member. Front part structure.