JP7020508B2 - Frame car - Google Patents

Description

The present invention relates to the structure of a frame vehicle, more specifically to the structure of a frame frame of a frame vehicle.

A frame car with a body mounted via a cab mount on a ladder-shaped frame skeleton consisting of multiple cross members spanned between the left and right side rails and the side rails is used (patented). See Document 1).

JP-A-2017-136909

When the body moves relative to the frame skeleton in the event of a collision, the fastening member of the cab mount with the body is released, and the frame vehicle has a structure that reduces the entry stroke of the barrier to the body. However, in the case of a side collision (hereinafter referred to as a side collision) where the relative displacement between the body and the frame skeleton is small, the fastening member of the cab mount is not released, and the entry stroke of the barrier to the body becomes large. In some cases.

Therefore, an object of the present invention is to reduce the approach stroke of the barrier to the body at the time of a side collision in the frame vehicle.

The frame vehicle of the present invention has a ladder-shaped frame frame including a pair of left and right side rails extending in the front-rear direction of the vehicle and a plurality of cross members extending in the width direction of the vehicle so as to be bridged between the pair of the side rails. A frame vehicle comprising a body fastened by a fastening member that breaks and is released from fastening on a rear cab mount attached to the side rail, wherein the plurality of cross members are The first cross member, which is a skeleton member having a square closed cross section arranged in front of the vehicle of the rear cab mount, and the second cross, which is a skeleton member having a square closed cross section arranged behind the vehicle of the rear cab mount. The member includes at least one third cross member arranged in the vicinity of the rear cab mount between the first cross member and the second cross member, and the third cross member is in the vehicle width direction. It has a curved portion curved so as to be convex in the upward direction of the vehicle in the central portion, and is connected to the side rail so that the upper surface is at the same height as the upper surface of the side rail, and is connected to the first cross member. It is characterized in that only the third cross member is bridged between the pair of side rails with the second cross member .

When the barrier enters the side rail on the collision side of the frame skeleton at the time of a side collision, the cross member arranged near the cab mount buckles and deforms upward in the vehicle at the curved portion in the center in the vehicle width direction. As a result, the relative displacement between the body and the side rail on the side opposite to the collision side becomes large, and the fastening member of the cab mount on the side opposite to the collision side is released. After that, the fastening member of the cab mount on the collision side is released. In this way, the fastening members of the cab mount on the collision side and the opposite side to the collision side are released from each other, and the body can move with respect to the frame skeleton. Can be reduced. Further, since the impact energy can be absorbed by the buckling deformation of the cross member in the upward direction of the vehicle, the impact force applied to the occupant at the time of a side collision can be reduced.

In the frame vehicle of the present invention, the third cross member arranged in the vicinity of the rear cab mount may be a hat-shaped cross-section member or a groove-shaped cross-section member whose upward direction of the vehicle is open, or a closed cross-section member.

By using a hat-shaped cross-section or groove-shaped cross-section member with the vehicle upward direction open, the cross member placed near the cab mount is more easily buckled and deformed upward in the vehicle upward direction, and a collision occurs at an early stage of a side collision. It is possible to release the fastening member of the cab mount on the opposite side to the side.

In the frame vehicle of the present invention, the third cross member, which includes a battery mounted on the floor panel of the body and is arranged in the vicinity of the rear cab mount, is located in the vicinity of the rear cab mount and of the battery. It may be placed on the lower side.

This can reduce the entry stroke of the barrier to the body in the area where the battery is located.

INDUSTRIAL APPLICABILITY In a frame vehicle, the present invention can reduce the approach stroke of the barrier to the body at the time of a side collision.

It is a top view which shows the frame skeleton of the frame car of embodiment, and the rear part of the floor panel of a body. It is a side view which shows the frame skeleton of the frame car of embodiment, and the floor panel of a body. It is a perspective view which shows the frame skeleton of the frame car of embodiment. It is a detailed perspective view of the part A shown in FIG. It is sectional drawing of the cross member arranged in the vicinity of a cab mount. It is a top view which shows the initial state of the side collision of the frame car of embodiment. It is a top view which shows the latter half of the side collision of the frame car of embodiment. It is a BB cross section shown in FIG. 7.

Hereinafter, the frame vehicle 100 of the embodiment will be described with reference to the drawings. The arrows FR, UP, and RH shown in each figure indicate the front direction (traveling direction), the upward direction, and the right direction of the vehicle, respectively. Further, the opposite directions of the arrows FR, UP, and RH indicate the vehicle rear direction, the downward direction, and the left direction. Hereinafter, when the explanation is simply made using the front-rear, left-right, and up-down directions, unless otherwise specified, the front-rear direction of the vehicle front-rear direction, the left-right direction of the vehicle left-right direction (vehicle width direction), and the up-down direction of the vehicle up-down direction are shown. do. Further, the subscripts L and R of the reference numerals indicate the members arranged on the left and right, respectively.

As shown in FIGS. 1 and 2, the frame vehicle 100 of the embodiment includes a ladder-shaped frame skeleton 10 and a body 50 mounted on the frame skeleton 10.

The frame skeleton 10 has first to ninth cross members 12 to 16 extending in the vehicle width direction so as to be bridged between a pair of left and right side rails 11L and 11R extending in the vehicle front-rear direction and left and right side rails 11L and 11R. , 21, 25, 17, 18 are ladder-shaped skeletal members. Vampire force 19, 20 are connected to the front and rear ends of the frame skeleton 10, respectively.

Front suspension brackets 31L and 31R to which the front wheel suspension device is attached are attached to the outside in the vehicle width direction in front of the left and right side rails 11L and 11R. Further, rear suspension members 34L and 34R to which a rear wheel suspension device is attached are attached between the rear eighth cross member 17 and the ninth cross member 18.

Front cab mount brackets 32L and 32R to which front cab mounts 43L and 43R that support the front left and right of the body 50 are attached are attached to the outside in the vehicle width direction in front of the left and right side rails 11L and 11R. Further, outriggers 33L and 33R to which rear cab mounts 46L and 46R for supporting the left and right rear of the body 50 are attached are attached to the outside in the rear vehicle width direction.

As shown in FIG. 2, the first and second cross members 12 and 13 are skeleton members having a square closed cross-section structure arranged on the front side of the front suspension brackets 31L and 31R. The third cross member 14 is a skeleton member having a square closed cross-section structure arranged between the front suspension brackets 31L and 31R and the front cab mount brackets 32L and 32R. The fourth and fifth cross members 15 and 16 are skeletal members having a square closed cross-section structure arranged side by side in the front-rear direction behind the front cab mount brackets 32L and 32R. The eighth to ninth cross members 17 to 18 are skeletal members having a square closed cross-section structure arranged at the rear of the vehicle. The sixth and seventh cross members 21 and 25 are arranged in the vicinity of the outriggers 33L and 33R on the front side of the vehicle with respect to the outriggers 33L and 33R. The sixth and seventh cross members 21 and 25 are hat-shaped cross-sectional members whose upward direction of the vehicle is open. The seventh cross member 25 is arranged below the battery 51 and the branch box 52 mounted on the floor panel 41 described later.

As shown in FIG. 2, the body 50 includes a floor panel 41 constituting the floor of the vehicle interior, a front undercross 42 arranged on the lower surface of the front end of the floor panel 41 and extending in the vehicle width direction, and a rear of the floor panel 41. It includes a rear undercross 45 that is arranged on the lower surface of the end and extends in the vehicle width direction. The illustration and description of other strength members such as rockers attached to the floor panel 41 will be omitted. The floor panel 41 is formed with a floor tunnel portion 41a extending in the front-rear direction of the vehicle with an upwardly convex groove-shaped cross section in the center in the vehicle width direction. A battery 51 and a branch box 52 are mounted on the upper surface of the rear portion of the floor panel 41 via mounting brackets 53 and 54. The battery 51 and the branch box 52 are arranged above the seventh cross member 25.

As described above, the left and right front cab mounts 43L and 43R are attached to the left and right front cab mount brackets 32L and 32R. The left and right ends of the front undercross 42 of the floor panel 41 are mounted on the left and right front cab mounts 43L and 43R, respectively, and are fastened to the left and right front cab mounts 43L and 43R by bolts 44L and 44R which are fastening members. .. Similarly, the left and right ends of the rear undercross 45 of the floor panel 41 are mounted on the left and right rear cab mounts 46L and 46R, respectively, and are provided in the bolt holes 48L and 48R (see FIG. 1) provided in the rear undercross 45. It is fastened to the left and right rear cab mounts 46L, 46R with bolts 47L, 47R, which are passing fastening members.

As shown in FIGS. 3 and 4, the sixth and seventh cross members 21 and 25 have curved portions 22 and 26 curved so as to be convex in the vehicle upward direction at the central portion in the vehicle width direction. Since the sixth and seventh cross members 21 and 25 have the same cross-sectional shape, they will be described with reference to different reference numerals for the common cross-sectional shape in FIG. As shown in FIG. 5, the sixth and seventh cross members 21 and 25 are hat-shaped cross-sectional members whose upward direction of the vehicle is open. Lips 21a and 25a are provided on the open side. The reason why the upper side of the vehicle is the open side is that the curved portions 22 and 26 are likely to buckle and deform upward in cooperation with the shape of the curved portions 22 and 26 that are convex upward at the time of side collision. As shown in FIG. 4, the sixth and seventh cross members 21 and 25 have brackets 23 at both ends so that the upper surfaces of the lips 21a and 25a have substantially the same height as the upper surfaces of the left and right side rails 11L and 11R. It is connected to the left and right side rails 11L and 11R at 27.

Deformation of each part when the frame car 100 configured as described above collides sideways will be described with reference to FIGS. 6 to 8. In the following description, a case where the right side of the vehicle in the vicinity of the sixth and seventh cross members 21 and 25 collides with the pole 80 will be described. The right side of the vehicle is the collision side, and the left side of the vehicle is the opposite side to the collision side.

As shown in FIG. 6, when the right side of the vehicle collides with the pole 80, the pole 80 enters the right side of the body 50 like the pole 80 shown by the alternate long and short dash line. Then, as shown by the alternate long and short dash line, the right side of the floor panel 41 is greatly deformed, and the pole 80 enters in front of the side rail 11R on the right side. At this time, the position of the bolt hole 48R provided at the right end of the rear undercross 45 of the floor panel 41 is shifted to the left by the distance d1 with respect to the side rail 11R like the bolt hole 48R shown by the alternate long and short dash line. Further, the position of the bolt hole 48L shown by the solid line provided at the left end of the rear undercross 45 is shifted to the left by the distance d2 with respect to the side rail 11L like the bolt hole 48L shown by the alternate long and short dash line. Here, since the distance d1 and the distance d2 are smaller than the breaking displacement ds, the bolt 47R on the right side and the bolt 47L on the left side are inclined by the movement of the bolt holes 48R and 48L, respectively, but are not broken.

As shown in FIGS. 7 and 8, when the pole 80 enters the right side rail 11R due to a side collision, the pole 80 pushes the right side rail 11R to the left like the pole 80 shown by the alternate long and short dash line. Transform. At this time, like the side rail 11R shown by the alternate long and short dash line, the side rail 11R moves to the left between the fifth cross member 16 and the eighth cross member 17 which are square closed cross-section members and do not buckle. At this time, as shown in FIG. 8, the central curved portion 26 of the seventh cross member 25 buckles and deforms upward like the curved portion 26 shown by the alternate long and short dash line. Further, although not shown, similarly, the central curved portion 22 of the sixth cross member 21 also buckles and deforms upward. As a result, the distance between the left and right side rails 11L and 11R in the area near the rear cab mounts 46L and 46R where the 6th and 7th cross members 21 and 25 are arranged is reduced from the initial W0 to W1. Therefore, the left side of the floor panel 41 is pushed out to the left side of the vehicle like the floor panel 41 shown by the alternate long and short dash line. As a result, the position of the bolt hole 48L provided at the left end of the rear undercross 45 is shifted to the left by the distance d4 with respect to the side rail 11L like the bolt hole 48L shown by the alternate long and short dash line. Since the distance d4 is larger than the breaking displacement ds, the bolt 47L on the left side breaks. As a result, the fastening between the left end of the rear undercross 45 and the rear cab mount 46L is released.

At this time, the position of the bolt hole 48R on the right side is shifted to the left side by a distance d3 with respect to the side rail 11R as shown by the bolted hole 48 shown by the alternate long and short dash line in FIG. Here, since the distance d3 has not reached the breaking displacement ds, the bolt 47R on the right side has not yet broken. Then, when the pole 80 further enters, the distance d3 reaches the breaking displacement ds, and the bolt 47R on the right side breaks.

When the left and right bolts 47L and 47R break, the rear part of the body 50 can move with respect to the frame skeleton 10, so that the body 50 escapes from the pole 80 to the left in the latter half of the side collision. Therefore, it is possible to reduce the approach stroke of the pole 80 with respect to the rear side surface of the body 50 in the latter half of the side collision. Further, since the battery 51 and the branch box 52 are mounted on the floor panel 41 on the upper side of the seventh cross member 25, the frame vehicle 100 of the embodiment branches from the battery 51 of the body 50 at the time of side collision. The approach stroke of the pole 80 to the area where the box 52 and the box 52 are mounted can be reduced.

As described above, in the frame vehicle 100 of the embodiment, the sixth and seventh cross members 21 and 25 that can be buckled and deformed upward are arranged in the vicinity of the rear cab mounts 46L and 46R, so that the side collision is quick. At the stage, the connection between the body 50 and the left and right side rails 11L and 11R can be released. This makes it possible to reduce the approach stroke of the pole 80 to the rear side surface of the body 50 in the latter half of the side collision.

Further, when the pole 80 enters the right side rail 11R, the sixth and seventh cross members 21 and 25 buckle and deform upward to absorb the impact energy, so that the occupant and the floor may collide at the time of a side collision. The impact force applied to the member mounted on the panel 41 can be reduced.

In the embodiment described above, the sixth and seventh cross members 21 and 25 have been described as a hat-shaped cross-section member whose upward direction is open, but the present invention is not limited to this, and the groove-shaped cross-section member whose upward direction is open is also used. good. Further, it may be composed of a closed cross-sectional shape member having a rigidity such that the curved portions 22 and 26 buckle and deform upward in cooperation with the shape of the curved portions 22 and 26 that are convex upward at the time of side collision. Further, although the seventh cross member 25 has been described as being arranged below the battery 51 and the branch box 52, the present invention is not limited to this, and the seventh cross member 25 is arranged near the outriggers 33L and 33R to which the rear cab mounts 46L and 46R are attached. If so, it does not have to be arranged under the battery 51.

Further, in the embodiment, it has been described that the floor panel 41 and the rear cab mounts 46L and 46R are fastened with bolts 47L and 47R, but if the member is broken and the fastening is released in the event of a collision, the bolts can be used. Not limited to this, it may be fastened using a rod or the like.

10-frame skeleton, 11L, 11R side rails, 12-16 1st-5th crossmembers, 17,18 8th, 9th crossmembers, 19,20 Vampireen Force, 21,25, 6th, 7th crossmembers, 21a, 25a Lips, 22,26 Curved Parts, 23,27 Brackets, 31L, 31R Front Suspension Brackets, 32L, 32R Front Cab Mount Brackets, 33L, 33R Outriggers, 34L, 34R Rear Suspension Members, 41 Floor Panels, 41a Floor Tunnels Part, 42 front undercross, 43L, 43R front cab mount, 44L, 44R, 47L, 47R bolt, 45 rear undercross, 46L, 46R rear cab mount, 48L, 48R bolt hole, 50 body, 51 battery, 52 branch box , 53,54 mounting bracket, 80 poles, 100 frame car.

Claims (3)

A ladder-shaped frame skeleton comprising a pair of left and right side rails extending in the front-rear direction of the vehicle and a plurality of cross members extending in the width direction of the vehicle so as to be bridged between the pair of the side rails.
A frame vehicle comprising a body fastened by a fastening member that breaks and is released in the event of a collision on a rear cab mount mounted on the side rail.
The plurality of cross members are a first cross member which is a skeleton member having a square closed cross section arranged in front of the vehicle of the rear cab mount, and a skeleton having a square closed cross section arranged behind the vehicle of the rear cab mount. It includes a second cross member which is a member and at least one third cross member arranged in the vicinity of the rear cab mount between the first cross member and the second cross member .
The third cross member has a curved portion curved so as to be convex in the vehicle upward direction in the central portion in the vehicle width direction, and is connected to the side rail so that the upper surface is at the same height as the upper surface of the side rail. Has been
Only the third cross member is bridged between the pair of side rails between the first cross member and the second cross member .
A frame car featuring. The frame vehicle according to claim 1.
The third cross member arranged in the vicinity of the rear cab mount is a hat-shaped cross-section member or a groove-shaped cross-section member whose upward direction of the vehicle is open, or a closed cross-section member.
A frame car featuring. The frame vehicle according to claim 1 or 2.
Includes a battery mounted on the floor panel of the body
The third cross member arranged in the vicinity of the rear cab mount shall be arranged in the vicinity of the rear cab mount and below the battery.
A frame car featuring.

Images