JP3120735B2 - Cab structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab structure for a vehicle, and more particularly to a cab structure for suppressing cab deformation at the time of a vehicle collision.

[0002]

2. Description of the Related Art A cab of a vehicle is shown in FIGS.
1, the front end of the engine 2 fixed to the frame 1 is brought close to the front of the cab, or the reinforcing member 3 is installed so as to cross the front of the cab, and the reinforcement extends in the front-rear direction of the vehicle. The members 4 and 5 are respectively installed in series on both side surfaces of the cab, and both ends of the reinforcing member 3 are brought close to the front end of the reinforcing member 4 respectively, while the rear end of the reinforcing member 5 is placed on the packing box 6 fixed to the frame 1. When the vehicle collides, the rearward displacement of the front surface of the cab is suppressed by the engine 2 fixed to the frame 1 or the frame 1 is reinforced by the reinforcing members 3, 4, 5.
Conventionally, it is considered that the cab is restrained by the rear cargo box 6 fixed to the cab. May act, and
In the latter case, there is a problem that it is difficult to tilt the cab, and the cab is not practical.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to reinforce a main sill or the like of a cab of a vehicle to prevent the main sill from being extremely bent at the time of a vehicle collision and to reduce an impact received by the cab. The purpose is to increase the safety of the occupants.

[0004]

For this reason, the cab structure according to the present invention has a hat-shaped cross section that opens upward, extends substantially in the front-rear direction of the vehicle, and has an upper end fixed to the lower surface of the floor and closed with the floor. and Meinshiru forming the cross-section, the main
Provided at the bend in the vehicle width direction
Straddling both side walls of the main sill at the upper and lower middle position of the surface
The first reinforcing member disposed, the bent portion, and approximately the front and rear of the vehicle
The upper and lower sides formed on the main sill at intervals in the direction
To the side of the main sill.
Second reinforcing member arranged to substantially close the closed cross section
A door side rail installed inside the door and extending substantially in the front-rear direction of the vehicle, and a backside stiffener attached to a cab side portion behind the door and extending substantially in the front-rear direction of the vehicle.

That is, in the vehicle width direction of the main sill
Of the main sill closed section
The first reinforcement portion is disposed across both side walls of the main sill.
Between the material and the bent portion in the vehicle width direction and approximately in the front-rear direction of the vehicle
Vertically bent portion formed on the main sill at a distance
Is installed on both sides of the main sill.
The second reinforcement member which substantially closes the Nshiru closed section, because both the bent portion of Meinshiru is reinforced respectively, also act a large load on the collision Meinshiru vehicle, that each bend of Meinshiru bends extremely Is prevented,
Due to the relatively gentle bending deformation, the occupant space in the cab is not extremely narrowed, and in the event of a vehicle collision, in addition to the bending deformation of the main sill, it is installed inside the door and substantially in the front-rear direction of the vehicle. It is attached to the extended door side rail and the rear side of the door,
The backside stiffener, which also extends substantially in the front-back direction of the vehicle, is also appropriately deformed, and the front-back kinetic energy acting on the cab is effectively absorbed by their overall deformation,
The impact received by the occupant can be reliably reduced.

[0006]

Embodiments of the present invention will be described below. 1 to 5, a floor 11 of a cab 10 of a vehicle forms a tunnel portion 12 whose central portion in the vehicle width direction protrudes upward, and a top surface of the tunnel portion 12 is substantially the same in the vehicle interior in the front-rear direction of the vehicle. The engine 13 is mounted on the rear lower surface side of the vehicle, and seats 14 are arranged on both sides of the tunnel portion 12, respectively. The front end of the floor 11 is connected to a front structure 15 such as a cross member of the cab 10.

[0007] On both sides of the lower surface of the floor 11, main sills 20 each having a hat-like cross section and opening upward are respectively arranged to extend substantially in the front-rear direction of the vehicle. The upper flange 23 of the main sill 20 is fixed to the lower surface of the floor 11, and a closed cross section is formed by the lower surface of the floor 11 and the main sill 20. The front end of the main sill 20 is also connected to the front structure 15.

As shown in FIGS. 5, 6, and 7, a gusset 24 having an L-shaped cross section is mounted in a bent portion 21 of the main sill 20, and both side walls 25 and a bottom surface 26 of the main sill 20 are provided. Is formed, and the three plate-like reinforcing members 27 are welded to the side walls 25 and the bottom surface 26 at their flanges 28, respectively, so as to straddle the side walls 25 and to be substantially perpendicular to the side walls 25 and the bottom surface 26, respectively. Are arranged so as to substantially close the closed cross section at intervals in the longitudinal direction of the main sill 20, and furthermore, a reinforcing member 29 having a U-shaped cross section is welded to both side walls 25 by its flange 30, It is arranged so as to straddle both side walls 25 at the upper and lower intermediate positions of the closed cross section, and the inside of the bent portion 21 is formed in a box shape by the reinforcing members 27 and 29.

As shown in FIGS. 5, 8 and 9, gussets 31 having a U-shaped cross section are mounted in the bent portions 22 of the main sill 20, and both side walls 32 and a bottom surface 33 of the main sill 20 are provided. Are formed, and three plate-like reinforcing members 34 are respectively formed on both side walls 32 by their flanges 35.
And the bottom surface 33 and the lower surface of the floor 11 are welded to each other so as to be substantially perpendicular to the side walls 32 and the bottom surface 33, respectively, and the above-mentioned closed cross section is substantially spaced apart in the longitudinal direction of the main sill 20. It is closed.

Further, as shown in FIG. 1, a door side rail 40 extending substantially in the front-rear direction of the vehicle is installed inside the door 41 of the cab 10, and a cab side portion behind the door 41 is provided. A back side stiffener 43 is attached to the rear side stiffener 43 and extends substantially linearly with the door side rails 40 in a substantially front-rear direction of the vehicle.

As described above, the bent portion 21 and the bent portion 22 of the main sill 20 are reinforced by the reinforcing members 27 and 29 and the reinforcing member 33, respectively, so that their rigidity is enhanced and the central tunnel portion of the floor 11 is provided. 12
Extends in the vehicle interior at approximately the same height in the front-rear direction of the vehicle, and the front end thereof is connected to the front structure 15.
2 reinforces the floor 11 with respect to the front-rear direction of the vehicle.
When the main sill 5 is strongly pressed rearward, the main sill 20 is prevented from being extremely bent at the bent portions 21 and 22 and relatively gently bent as shown by the two-dot chain line in FIG. Also, the door side rail 40 inside the door 41 and the back of the
Since the cab 10 is also reinforced by the side stiffeners 43 , even if the cab 10 is deformed as shown by a two-dot chain line in FIG. 4, it is easy to extremely narrow the occupant space near the seat 14. Can be suppressed.

Further, the kinetic energy acting on the cab 10 in the front-rear direction due to the collision of the vehicle includes bending deformation of the highly rigid bent portions 21 and 22 of the main sill 20 and bending deformation of the floor 11 including the tunnel portion 12. This is effectively absorbed by the deformation of the door side rails 40 and the back side stiffeners 43 extending substantially linearly in the substantially front-rear direction of the vehicle, so that the impact received by the occupant can be greatly reduced.

Therefore, there is an advantage that the safety of the occupant in the event of a vehicle collision can be greatly increased by securing the occupant space in the cab 10 and absorbing the kinetic energy due to the deformation of the cab 10 parts. The above mechanism has a relatively simple structure, is light in weight, and does not impair the tilt function of the cab 10 at all. Therefore, the mechanism has a practical advantage that can be easily applied to a vehicle as required.

[0014]

In the cab structure according to the present invention,
The main sill is provided at the bend in the vehicle width direction.
Straddle both side walls of the main sill at the upper and lower middle position of the closed section of the sill
A first reinforcing member disposed so as to be bent, and a bending in a vehicle width direction.
Formed on the main sill with a space in the front-rear direction between the curved part and the vehicle
The main sills are provided at the bent part
Closed across the main sill closed section by straddling the side wall
The second reinforcing member that, both bent portions of Meinshiru it
It is because it is reinforced, that each <br/> bend of Meinshiru upon collision of the vehicle is bent extreme is prevented, for relatively gently bending deformation, possible to easily secure a passenger space in the cab At the same time, in the event of a vehicle collision, in addition to the bending deformation of the main sill, the door side rails inside the door and the back side stiffeners on the carburetor side are also appropriately deformed, and the kinetic energy acting on the cab in the front-rear direction is reduced. Effectively absorbed by the overall deformation,
As a result, the impact received by the occupant can be reliably reduced, so that the safety of the occupant can be improved comprehensively.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention.

FIG. 2 is a perspective view of the vehicle interior of the embodiment.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a side view of a main part of the embodiment.

FIG. 5 is a plan view of a main part of the embodiment.

FIG. 6 is an enlarged vertical sectional view taken along the line VI-VI of FIG. 5;

FIG. 7 is a perspective view of FIG. 6;

FIG. 8 is an enlarged vertical sectional view of VIII-VIII in FIG. 5;

FIG. 9 is a perspective view of FIG. 8;

FIG. 10 is a fragmentary side view of a conventional device.

FIG. 11 is a side view of another conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cab 11 Floor 12 Tunnel part 15 Front structure 20 Main sill 21, 22 Bent part 27, 29, 34 Reinforcement member 40 Side rail 41 Door 42 Carrier side part 43 Back side stiffener

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-205838 (JP, A) JP-A-6-48327 (JP, A) JP-A-10-7029 (JP, A) JP-A 9-98 99872 (JP, A) Japanese Utility Model Showa 58-186968 (JP, U) Japanese Utility Model Showa 63-155864 (JP, U) Japanese Utility Model Utility Model No. 3-98182 (JP, U) Registered Utility Model 300 29818 (JP, U) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) B62D 33/06 B62D 25/08 B62D 25/20

Claims (2)

(57) [Claims] 1. A main sill having a hat-shaped cross section that opens upward, extending substantially in the front-rear direction of the vehicle, and having an upper end portion fixed to a lower surface of the floor to form a closed cross section with the floor.
The closed cross section provided at the bent portion of the sill in the vehicle width direction
Between the upper and lower sides of the main sill.
The first reinforcing member placed, the bent portion, and substantially front and rear of the vehicle
The vertical direction formed on the main sill at an interval
To bend over both side walls of the main sill.
A second reinforcing member arranged to substantially close the closed cross section;
A cab structure having a door side rail installed inside a door and extending substantially in the front-rear direction of the vehicle, and a backside stiffener attached to a cab side portion behind the door and extending substantially in the front-rear direction of the vehicle. 2. The vehicle according to claim 1, wherein a tunnel portion is formed at a center portion of the floor in the vehicle width direction and protrudes upward, and a top surface of the tunnel portion extends to a front structure at substantially the same height in the vehicle interior. Cab structure.