JP4297727B2 - Vehicle cab structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cab structure such as a vehicle, in particular, a cab over truck, a cab over bus, a one-box car, and the like.
[0002]
[Prior art]
Conventionally, as this type of cab structure, a floor frame extending in the front-rear direction of the vehicle is fixed to the lower surface of the floor panel, a dash panel is fixed to the front end portion of the floor frame, and an outer front cross member extending in the vehicle width direction is a dash panel. A vehicle body of a cab over type vehicle is disclosed in which a cowl panel that is fixed to the lower front surface of the vehicle and extends in the vehicle width direction above the outer front cross member is fixed to the upper portion of the dash panel (see, for example, Patent Document 1). In this cab-over type vehicle body, a vertical reinforcing member extends in the vertical direction and is fixed to the front surface of the dash panel. The vertical reinforcing member is connected to the outer front cross member so that the lower end faces the front end of the floor frame, and the upper end is connected to the cowl panel. The outer front cross member is formed such that the center of the outer front cross member facing the front end of the floor frame is located below the upper surface of the floor panel adjacent to the outer front cross member.
[0003]
In the cab-over type vehicle body configured as described above, the rigidity and strength of the front part of the vehicle body can be increased by the vertical reinforcing member, and when a large external force acts on the vehicle body, the external force is effectively applied to the entire vehicle body. Therefore, it is possible to prevent large plastic deformation of the vehicle body. In addition, the outer front cross member is formed so that the center in the cross section of the outer front cross member facing the front end of the floor frame is located below the upper surface of the floor panel adjacent to the outer front cross member. When an external force is applied, the external force can be effectively transmitted to the floor frame. As a result, the effect of dispersing the external force is enhanced, and large plastic deformation of the vehicle body can be prevented more reliably.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-199363
[Problems to be solved by the invention]
However, in the vehicle body of the cab-over type vehicle described in the above-described conventional Patent Document 1, the outer front cross member and the vertical reinforcing member for securing the rigidity and strength of the dash panel are concentrated on the front surface of the dash panel. When parts such as engine accessories were attached to the front and back of the dash panel, there was a problem that the rigidity and strength on the back side of the dash panel were lower than those on the front side of the dash panel.
Further, in the cab-over type vehicle body described in Patent Document 1 above, the outer front cross member is installed between the pair of front pillars so as to be positioned in front of the dash panel, that is, the outer front cross member. However, there is a problem of narrowing this space because it protrudes into the space for accommodating the engine accessory between the dash panel and the front lid.
[0006]
A first object of the present invention is to provide a vehicle cab structure that can improve the rigidity and strength of the rear side of the dash panel by adding a relatively simple part called an inner front cross member.
The second object of the present invention is to reduce the overall length of the outer front cross member without substantially reducing the rigidity and strength of the front side of the dash panel, thereby expanding the space on the front side of the dash panel. To provide a structure.
[0007]
[Means for Solving the Problems]
As shown in FIGS. 1, 4, and 6, the invention according to claim 1 is a rear surface of a dash panel 12 that forms a front wall of a passenger compartment and to which components 21 to 23 are attached. An inner front cross member 14 provided on the lower surface and extending in the vehicle width direction, a pair of floor frames 16 and 16 provided on the lower surface of the floor panel 13 and extending in the front-rear direction of the vehicle, and at least a front surface of the dash panel 12 A cab structure for a vehicle comprising an outer front cross member 18 provided between a pair of floor frames 16, 16 facing the front ends and extending in the vehicle width direction so as to sandwich the dash panel 12 together with the inner front cross member 14. It is.
In the vehicle cab structure according to the first aspect, the outer front cross member 18 ensures the rigidity and strength of the front side of the dash panel 12 and the inner front cross member 14 improves the rigidity and strength of the rear side of the dash panel 12. it can. As a result, the rigidity and strength of the front side and the rear side of the dash panel 12 become substantially uniform. Therefore, even if the components 21 to 23 are attached to the front and rear sides of the dash panel 12, the dash panel 12 is not plastically deformed. .
[0008]
The invention according to claim 2 is the invention according to claim 1, and further, as shown in FIGS. 1 and 4, the outer front cross member 18 is between the portions facing the front ends of the pair of floor frames 16, 16. A cowl panel 26 that is provided only in the vehicle width direction is fixed to the upper edge of the dash panel 12, and a pair of reinforcing members 27, 27 are disposed on the front surface of the dash panel 12 so as to extend vertically. The upper ends of the members 27 and 27 are connected to the cowl panel 26, respectively, and the lower ends of the pair of reinforcing members 27 and 27 are connected to both ends of the outer front cross member 18, respectively.
In the vehicle cab structure described in claim 2, the outer front cross member 18 is provided only between the portions facing the front ends of the pair of floor frames 16, 16, and the lower ends of the pair of reinforcing members 27, 27 are connected to the outer. Since the front cross member 18 is connected to both ends, the outer front cross member 18 can be shortened without substantially reducing the rigidity and strength of the front side of the dash panel 12, thereby expanding the space in front of the dash panel 12. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 6, the vehicle of the present embodiment is a cab over type truck 10. The cab 11 of the truck 10 includes a dash panel 12 (FIGS. 1, 2, and 4) that forms the front wall of the passenger compartment, and a rear surface of the dash panel 12 and a lower surface of the floor panel 13 in the vehicle width direction. An inner front cross member 14 (FIGS. 1 to 5) provided to extend to the bottom of the floor panel 13 and a pair of floor frames 16, 16 (FIGS. 1 and 3 to FIG. 3) provided to extend in the front-rear direction of the track. 5) and an outer front cross member 18 provided in front of the dash panel 12. First and second parts 21 and 22 such as an engine accessory are attached to the front surface of the dash panel 12, and a third part 23 such as an engine accessory is attached to the rear face of the dash panel 12 (FIG. 4).
[0010]
A pair of front pillars 24, 24 (FIGS. 4 and 5) are provided on both sides of the front surface of the cab 11 so as to extend in a substantially vertical direction, and the inner front cross member 14 is installed between the pair of front pillars 24, 24. (FIG. 5). In the center of the inner front cross member 14, an upper convex portion 14 a that protrudes upward is formed to accommodate the upper front end of the engine, and the inner front cross member 14 as a whole is formed in a gate shape. The pair of floor frames 16 and 16 are provided at a predetermined interval in the vehicle width direction (FIGS. 4 and 5). The center portions of the pair of floor frames 16, 16 are formed with inclined portions 16a, 16a that gradually incline upward toward the rear, and the rear portions of these floor frames 16, 16 are formed one step higher than the front (see FIG. 5).
[0011]
The outer front cross member 18 is provided only between the portions facing the front ends of the pair of floor frames 16, 16, and is provided extending in the vehicle width direction so as to sandwich the dash panel 12 together with the inner front cross member 14. In the center of the outer front cross member 18, similarly to the inner front cross member 14, an upward projection 18 a that protrudes upward to accommodate the upper front end of the engine is formed, and the outer front cross member 18 as a whole has a portal shape. Formed. A cowl panel 26 extending in the vehicle width direction is fixed to the upper edge of the dash panel 12 (FIGS. 1 and 4). A pair of reinforcing members 27 are arranged on the front surface of the dash panel 12 so as to extend in the vertical direction. The upper ends of the reinforcing members 27 and 27 are connected to the cowl panel 26, respectively, and the lower ends of the reinforcing members 27 and 27 are connected to both ends of the outer front cross member 18, respectively.
[0012]
As shown in detail in FIGS. 1, 2, 3, and 5, the inner front cross member 14 is formed in a substantially hat-like cross section, has an open surface facing the dash panel 12, and has an upper edge and a lower edge. An upper flange 14b and a lower flange 14c for fixing to the dash panel 12 by spot welding or the like are provided at the edges. Further, as shown in detail in FIGS. 1, 2 and 4, the outer front cross member 18 is formed in a substantially hat-like cross section, has a surface facing the dash panel 12, and has an upper edge and a lower edge. An upper flange 18b and a lower flange 18c for fixing to the dash panel 12 by spot welding or the like are provided. Here, the center in the cross section of the outer front cross member 18 and the center in the cross section of the inner front cross member 14 are located on the same horizontal line L (FIGS. 1 and 2), and the outer front cross member 18 and the inner front cross member 18 are located. The vertical widths of the openings of the cross member 14 are the same.
[0013]
Further, as shown in detail in FIGS. 1 and 4, the reinforcing member 27 is formed in a substantially hat-like cross section, the surface facing the dash panel 12 is opened, and the dash panel 12 is spot welded to the dash panel 12 on both side edges. And a pair of side flanges 27a for fixing. The pair of reinforcing members 27, 27 are formed lower than the outer front cross member 18, and the lower ends of these reinforcing members 27, 27 are respectively inserted into the upper surfaces of the end portions of the outer front cross member 18.
[0014]
On the other hand, as shown in detail in FIGS. 3 and 4, the floor frame 16 is formed in a substantially hat-like cross section, the surface facing the floor panel 13 is opened, and spot welding or the like is performed on the floor panel 13 on both side edges. A pair of upper flanges 16b, 16b are provided for fixing at. Also, a pair of side flanges 16c, 16c for fixing to the rear surface of the inner front cross member 14 by spot welding or the like at the front end of the floor frame 16 and for fixing to the lower surface of the front cross member 14 by spot welding or the like. The lower flange 16d is provided (FIG. 3). As a result, the front end of the floor frame 16 is connected to the back surface of the front cross member 14. 6 denotes a front lid provided on the front surface of the cab 11 so as to extend in the vehicle width direction. The front lid 28 is pivotally attached to the cowl panel 26 at the upper edge, and is configured to releasably close the space between the dash panel 12 and the front lid 28.
[0015]
In the cab structure of the truck 10 thus configured, the gate-shaped outer front cross member 18 and the pair of reinforcing members 27 and 27 ensure the rigidity and strength of the front side of the dash panel 12, and the gate-shaped inner front cross member. 14, the rigidity and strength of the back side of the dash panel 12 can be improved. As a result, since the rigidity and strength of the front side and the back side of the dash panel 12 are substantially uniform, the first and second parts 21 and 22 are respectively attached to the front side of the dash panel 12 and the third side is attached to the back side of the dash panel 12. Even if the component 13 is attached, the dash panel 12 is not plastically deformed.
[0016]
Further, the outer front cross member 18 is provided only between the portions facing the front ends of the pair of floor frames 16, 16, the upper ends of the pair of reinforcing members 27, 27 are connected to the cowl panel 26, respectively, and the pair of reinforcing members 27 , 27 are connected to both ends of the outer front cross member 18, respectively, so that the outer front cross member 18 can be shortened without substantially reducing the rigidity and strength of the front side of the dash panel 12. As a result, the space between the dash panel 12 and the front panel 28 can be expanded, so that more parts or larger parts can be accommodated in the space.
In the above embodiment, the cab over type truck is used as the vehicle, but a one box car or a cab over type bus may be used.
[0017]
【The invention's effect】
As described above, according to the present invention, the inner front cross member is provided on the lower surface of the dash panel on the lower surface of the floor panel so as to extend in the vehicle width direction, and the pair of floor frames are provided on the lower surface of the floor panel in the front and rear of the vehicle. The outer front cross member extending in the vehicle width direction so as to sandwich the dash panel together with the inner front cross member is provided on the front surface of the dash panel. The strength is ensured, and the inner front cross member can improve the rigidity and strength of the rear side of the dash panel. As a result, since the rigidity and strength of the front side and the back side of the dash panel become substantially uniform, the dash panel will not be plastically deformed even if components are attached to the front and back sides of the dash panel, respectively.
[0018]
Further, the outer front cross member is provided only between the portions facing the front ends of the pair of floor frames, and a pair of reinforcing members are arranged in the vertical direction on the front surface of the dash panel, and the upper ends of these reinforcing members are connected to the cowl panel. And the lower end of the outer front cross member are connected to both ends of the outer front cross member, respectively, the overall length of the outer front cross member can be shortened as compared with the prior art without substantially reducing the rigidity and strength of the front side of the dash panel. As a result, the space in front of the dash panel can be expanded, so that more parts than before or parts larger than the conventional parts can be accommodated in this space.
[Brief description of the drawings]
1 is a cross-sectional view taken along line AA of FIG. 4 showing a cab structure of a vehicle according to an embodiment of the present invention.
2 is a cross-sectional view taken along line BB in FIG.
3 is an enlarged perspective view of a C part in FIG. 5;
FIG. 4 is a perspective view of a main part including a dash panel, a cowl panel, an outer front cross member, and a pair of reinforcing members.
FIG. 5 is a perspective view of a main part including an inner front cross member, a pair of floor frames, and a pair of front pillars.
FIG. 6 is a perspective view of the cab.
[Explanation of symbols]
10 Cabover truck (vehicle)
12 Dash panel 13 Floor panel 14 Inner front cross member 16 Floor frame 18 Outer front cross members 21-23 Parts 26 Cowl panel 27 Reinforcing member

Claims (2)

An inner front cross member that forms the front wall of the passenger compartment and is provided on the rear surface of the dash panel (12) to which the components (21 to 23) are attached and on the lower surface of the floor panel (13) extending in the vehicle width direction. (14) and
A pair of floor frames (16, 16) provided on the lower surface of the floor panel (13) so as to extend in the front-rear direction of the vehicle (10);
The dash panel (12) is sandwiched between the front surface of the dash panel (12) and at least a portion facing the front end of the pair of floor frames (16, 16) together with the inner front cross member (14). A vehicle cab structure provided with an outer front cross member (18) extending in the vehicle width direction. The outer front cross member (18) is provided only between the portions facing the front ends of the pair of floor frames (16, 16),
A cowl panel (26) extending in the vehicle width direction is fixed to the upper edge of the dash panel (12), and a pair of reinforcing members (27, 27) are arranged extending in the vertical direction on the front surface of the dash panel (12). ,
The upper ends of the pair of reinforcing members (27, 27) are connected to the cowl panel (26),
The vehicle cab structure according to claim 1, wherein lower ends of the pair of reinforcing members (27, 27) are respectively connected to both ends of the outer front cross member (18).

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