JP2003182641A - Vehicular cab structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To expand a space between a dash panel and a cab front wall by providing a front cross member on a back surface of the dash panel. <P>SOLUTION: A front cross member 14 is provided on a back surface of a dash panel forming a front wall of a vehicular cabin, and on a lower surface of a floor panel so as to extend in a vehicular width direction. Inner locker members 16, 17 are provided on a side edge lower surface of the floor panel so as to extend in a vehicular back-and-forth direction. Floor frames 18, 19 are provided on an lower surface of the floor panel so as to extend in the vehicular back-and-forth direction. Front ends of the inner locker members 16, 17 are connected to an end portion of the front cross member 14, and front ends of the floor frames 18, 19 are connected to a back surface of the front cross member 14. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab structure of a vehicle, particularly a cab-over type truck, a cab-over type bus, a one-box car and the like.

[0002]

2. Description of the Related Art Conventionally, a center portion of a floor panel in the vehicle width direction is provided so as to project above both side portions in the vehicle width direction, and a pair of floor frames extending in the front-rear direction of the vehicle are respectively provided on the lower surfaces of both side portions of the floor panel. There is proposed a vehicle body of a cab-over type vehicle in which a dash panel is fixed to a front end portion of a floor frame, and a front cross member extending in the vehicle width direction is fixed to a front surface of the dash panel (Japanese Patent Application Laid-Open No. 2-212058).
001-199368). In the body of this cab-over vehicle, the center of gravity of the cross section of the front cross member is located above the upper surface of the front end of the floor panel at the center in the vehicle width direction and below the upper surface of the front end of the floor panel at both sides in the vehicle width direction. A front cross member is formed so as to be located at.

In the vehicle body of the cab-over type vehicle constructed as described above, the center of gravity of the front cross member in the vehicle width direction central portion is located above the upper surface of the front end of the floor panel and the center of gravity of the front cross member on both sides. Is located below the upper surface of the front end of the floor panel, so when a large external force is applied to the front of the vehicle body, the external force is directly transmitted to the floor frame via the front cross member and the dash panel, and the entire vehicle body is exposed. Distributed. As a result, large stress is not locally generated in the vehicle body, and large plastic deformation of the vehicle body can be prevented. Therefore, even if the plate thickness of each member such as the front cross member, the dash panel, and the floor frame is set smaller than the conventional one, the rigidity and strength of the entire vehicle body can be increased.

[0004]

However, in the vehicle body of the cab-over type vehicle described in the above-mentioned Japanese Patent Laid-Open No. 2001-199368, the front cross member is provided in front of the dash panel, that is, the front cross member. Has a problem of narrowing this space because it protrudes into the space for accommodating engine accessories and the like between the dash panel and the front lid. Further, in the conventional cab-over type vehicle body, when the cab is configured to be tiltable, a mounting bracket having a through hole through which a shaft serving as a tilt center can be inserted must be attached only to the lower surface of the floor frame. In order to support an excessive vertical load generated on the mounting bracket during the bouncing and rebounding of the floor bracket, it is necessary to increase the size of the floor frame to increase its rigidity.

A first object of the present invention is to provide a cab structure for a vehicle in which the front cross member is provided on the rear surface of the dash panel, whereby the space between the dash panel and the cab front wall can be expanded. . A second object of the present invention is to improve the rigidity of the skeleton at the bottom of the cab, and when an excessive external force is applied from the front of the vehicle to the front of the cab, the external force is quickly dispersed to each member to locally increase the external force. It is an object of the present invention to provide a vehicle cab structure capable of preventing large plastic deformation of the cab by preventing the generation of stress. A third object of the present invention is to mount the mounting bracket from the lower surface of the front cross member to the lower surface of the floor frame so that the mounting bracket does not excessively move up and down when bouncing and rebounding the suspension without increasing the size of the floor frame. (EN) It is intended to provide a cab structure of a vehicle that can quickly disperse a directional load to each member via a front cross member and a floor frame.

[0006]

The invention according to claim 1 is
As shown in FIG. 1, FIG. 4 and FIG. 8, a front cross member 14 is provided on the back surface of the dash panel 12 forming the front wall of the vehicle compartment and on the lower surface of the floor panel 13 so as to extend in the vehicle width direction. , The vehicle 1 on the lower surface of the side edge of the floor panel 13.
Inner rocker member 1 extending in the front-rear direction of 0
A cab structure for a vehicle including a front cross member 14 and an inner rocker member 16,
The vehicle cab structure is characterized in that the front ends of 17 are connected. In the vehicle cab structure according to the first aspect, the front cross member 14 is provided in the dash panel 1.
Since it is provided on the back surface of 2, the space between the dash panel 12 and the front wall of the cab 11 can be expanded, and more engine accessories and the like can be accommodated. Also front cross member 1
Since the front ends of the inner rocker members 16 and 17 are connected to the end of No. 4, the rigidity of the skeleton at the bottom of the cab 11 can be improved, and when an external force is applied to the front of the cab 11 from the front of the vehicle, this external force is The cab 11 can be quickly dispersed in the member to prevent the occurrence of local overstress.
It is possible to prevent large plastic deformation.

The invention according to claim 2 is the invention according to claim 1, further, as shown in FIGS. 1, 6 and 8, provided on the lower surface of the floor panel 13 so as to extend in the front-rear direction of the vehicle 10. Further provided floor frames 18, 19 are provided, and the front ends of the floor frames 18, 19 are front cross members 14
It is characterized by being connected to the back of. The invention according to claim 3 is the invention according to claim 2, and further, as shown in FIGS. 1 and 6, the front cross member 14 is provided on an extension line of the floor frame 18, 19 which extends the axis P forward. It is characterized in that the axis Q is located.
In the vehicle cab structure described in claim 2 or 3, the rigidity of the skeleton at the bottom of the cab 11 can be further improved, and an excessive external force acting from the front of the vehicle 10 to the front of the cab 11 can be applied to each member more quickly. Since it is dispersed, the plastic deformation of the cab 11 can be further suppressed.

The invention according to claim 4 is the invention according to claim 2 or 3, further, as shown in FIGS. 1 and 6, from the lower surface of the front cross member 14 to the floor frame 1
Mounting bracket 2 over the bottom of 6, 17
8 is attached. In the cab structure for a vehicle according to the present invention, the mounting bracket 28 is attached from the lower surface of the front cross member 14 to the lower surfaces of the floor frames 18 and 19, so that the mounting bracket 28 is excessively generated when bounding or rebounding the suspension. Vertical load is applied to the front cross member 14 and the floor frames 16 and 17
It is quickly dispersed in each member through.

The invention according to claim 5 is the invention according to claim 1, further, as shown in FIGS. 3, 4 and 8, the inner surface of the inner rocker members 16 and 17 is opened, and Inner pillars 2 are provided on the outer surfaces of the front portions of the members 16 and 17.
7 is fixed, and the cross section of the front portions of the inner rocker members 16 and 17 is formed into a closed cross section. In the vehicle cab structure according to the fifth aspect, the rigidity of the skeleton at the bottom of the cab 11 can be further improved, and the excessive external force acting on the front surface of the cab 11 from the front of the vehicle 10 is more promptly dispersed to each member. The plastic deformation of the cab 11 can be further suppressed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 8, 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. 3 and 6) that forms a front wall of the passenger compartment and the dash panel 1
2 and the front cross member 14 provided on the lower surface of the floor panel 13 so as to extend in the vehicle width direction (see FIG.
6 to FIG. 6), a pair of inner rocker members 16 and 17 (FIGS. 1 to 4) provided on the lower surfaces of both side edges of the floor panel 13 so as to extend in the front-rear direction of the truck, and the front and rear surfaces of the truck on the lower surface of the floor panel 13. Direction and a pair of floor frames 18 and 19 (FIGS. 1 and 5 to 7), and a pair of front pillars 21 (FIGS. 4) and.

The front cross member 14 includes a cross member main body 22 provided at the center in the vehicle width direction, and a pair of cross end members 23, 24 connected to both ends of the cross member main body 22 and curved rearward. (FIGS. 1 to 3). The pair of floor frames 18 and 19 are provided between the pair of inner rocker members 16 and 17 with a predetermined space in the vehicle width direction (FIG. 1). The pair of inner rocker members 16, 17 and the pair of floor frames 18, 1
9. Since the pair of front pillars 21 and the pair of cross end members 23 and 24 are symmetrical, the left inner rocker member 16, the left floor frame 18, the left front pillar 21, and the left cross end member 23 are representative. The right inner rocker member 17, the right floor frame 19, the right front pillar, and the right cross end member 24 will not be described.

As shown in detail in FIGS. 2, 3, 5 and 6, the cross member main body 22 has a substantially hat-shaped cross section, and the surface facing the dash panel 12 is open.
Moreover, an upper flange 22a and a lower flange 22b for fixing to the dash panel 12 by spot welding or the like are provided at the upper edge and the lower edge, respectively. Further, as shown in detail in FIGS. 2 to 4, the cross end member 23 has a substantially hat-shaped cross section, opens from the front surface to the outer surface, and has an upper flange 23a and a lower flange 23b at the upper and lower edges. Each is provided. Further, as shown in detail in FIGS. 2 to 4, the inner rocker member 16 has a cross section formed in a substantially hat shape, an outer side surface is opened, and an upper flange 16a and a lower flange 16b are provided at upper and lower edges, respectively. . The end of the cross member main body 22 is fixed to one end of the cross end member 23 by spot welding or the like, and the front end of the inner rocker member 16 is inserted into the other end of the cross end member 23 to be spot welded or the like. Is fixed.

As shown in detail in FIGS. 3 and 4, the front pillar 21 has a substantially U-shaped cross section and has a front flange 26a and a rear flange 26b at its front and rear edges.
Outer pillars 26 each provided with a front flange 27a and a rear flange 27b formed on a front edge and a rear edge, respectively.
Have. The front flanges 26a and 27a are fixed to each other by spot welding or the like while sandwiching the side edges of the dash panel 12, and the rear flanges 26b and 27b are fixed to each other by spot welding or the like, whereby the front pillar 2 is secured.
The cross section of 1 is formed into a closed cross section. Also inner pillar 2
An upper flange 16a and a lower flange 16b at the front portion of the inner rocker member 16 are fixed to 7 by spot welding or the like. As a result, the front opening of the inner rocker member 16 is closed, and the cross section of the front portion of the inner rocker member 16 is formed into a closed cross section.

On the other hand, the floor frame 18 is shown in FIGS.
As shown in detail in, the cross section is formed into a substantially hat shape,
A surface facing the floor panel 13 is opened, and a pair of upper flanges 18a, 18a for fixing the floor panel 13 to the floor panel 13 by spot welding or the like are provided on both side edges. At the front end of the floor frame 18, a pair of side flanges 18b, 18b for fixing to the back surface of the front cross member 14 by spot welding or the like, and for fixing to the lower surface of the front cross member 14 by spot welding or the like. A lower flange 18c is provided (Fig. 5). As a result, the front end of the floor frame 18 is connected to the back surface of the front cross member 14. At this time, the front cross member 1 is placed on the extension line extending the axis P of the floor frame 18 forward.
It is preferable to arrange so that the axis Q of 4 is located (FIG. 6).

Further, as shown in detail in FIGS. 6 and 7, from the lower surface of the front cross member 14 to the floor frame 18
The mounting bracket 28 is mounted over the lower surface of the. The mounting bracket 28 is fixed to both side surfaces of the bracket main body 29 and the bracket main body 29 whose cross section is formed in a substantially U-shape, and extends from both side surfaces of the bracket main body 29 to both side surfaces of the floor frame 18. It has a pair of reinforcing plates 31 and 31 extending. The bracket body 29 is formed with a through hole 29a through which a shaft (not shown) serving as a tilt center when the cab 11 is tilted is formed (FIG. 6), and the pair of reinforcing plates 31 and 31 includes a bolt 32 and a nut. It is fixed to the floor frame 18 by 33 (FIG. 7). Reference numeral 34 in FIG. 8 is a front lid provided on the front surface of the cab so as to extend in the vehicle width direction. An upper edge of the front lid 34 is pivotally attached to the cowl 36 and is configured to openably close the space between the dash panel 12 and the front lid 34.

In the cab structure of the truck 10 thus constructed, the front cross member 14 is provided on the back surface of the dash panel 12, so that the space between the dash panel 12 and the front lid 34 can be expanded. As a result, more engine accessories can be accommodated in the space. Further, the front ends of the inner rocker members 16 and 17 are connected to the end portions of the front cross member 14 so that the floor frame 1
Connect the front end of 8 to the back of the front cross member 14,
Furthermore, since the front cross section of the inner rocker member 16 is formed into a closed cross section by the inner pillar 27, the rigidity of the skeleton at the bottom of the cab 11 can be improved, and when an excessive external force acts from the front of the truck 10 to the front of the cab 11, This external force can be quickly dispersed to each member. As a result, it is possible to prevent local overstress from occurring in the cab 11, so that it is possible to prevent the cab 11 from undergoing large plastic deformation.

Further, since the mounting bracket 28 is attached from the lower surface of the front cross member 14 to the lower surface of the floor frame 18, the mounting bracket 28 is mounted when the suspension bounces or rebounds.
An excessive vertical load generated in the above is quickly dispersed to each member via the front cross member 14 and the floor frame 18. As a result, it is not necessary to increase the size of the floor frame 18.

Although the cab-over type truck is used as the vehicle in the above embodiment, a one-box car or a cab-over type bus may be used. Further, in the above embodiment, the front cross member is configured by separately molding the cross member main body and the pair of cross end members, and then connecting the pair of cross end members to both ends of the cross member main body. However, if the shapes of the cross member body and the cross end member are relatively simple, the front cross member may be configured by integrally molding the cross member body and the pair of cross end members. In this case, the number of parts can be reduced and the manufacturing cost can be reduced. Further, in the above-mentioned embodiment, the floor panel is composed of one sheet extending from the left inner rocker member to the right inner rocker member. However, a floor body whose both side edges are provided between a pair of floor frames, It may be a floor panel having a left side floor provided between the left floor frame and the left inner rocker member, and a right side floor provided between the right floor frame and the right inner rocker member.

[0019]

As described above, according to the present invention, the floor panel is attached to the end of the front cross member provided on the rear surface of the dash panel and extending in the vehicle width direction on the lower surface of the floor panel. Since the front end of the inner rocker member that extends in the front-rear direction of the vehicle is connected to the lower surface of the side edge, the space between the dash panel and the cab front wall can be expanded, and more engine accessories can be accommodated. The rigidity of the skeleton at the bottom of the cab can be improved. Further, when an excessive external force acts on the front surface of the cab from the front of the vehicle, the external force can be quickly dispersed to each member to prevent the occurrence of a local excessive stress, so that a large plastic deformation of the cab can be prevented. Also, connect the front end of the floor frame, which is provided on the lower surface of the floor panel, extending in the front-rear direction of the vehicle, to the rear surface of the front cross member, and further align the axis of the front cross member with the extension line that extends the axis of the floor frame forward. With this configuration, the rigidity of the skeleton at the bottom of the cab can be further improved, and an excessive external force acting from the front of the vehicle to the front of the cab can be dispersed to each member more quickly.
As a result, the plastic deformation of the cab can be further suppressed.

Further, if the mounting bracket is attached from the lower surface of the front cross member to the lower surface of the floor frame, an excessive vertical load generated on the mounting bracket at the time of bouncing and rebounding of the suspension causes the front cross member and the floor frame to be excessively loaded. Since it is quickly dispersed to each member through the above, it is possible to prevent the floor frame from increasing in size. Furthermore, if the inner side of the inner rocker member is opened and the inner pillar is fixed to the outer side of the front part of the inner rocker member, and the cross section of the front part of the inner rocker member is formed into a closed cross section, the rigidity of the skeleton at the bottom of the cab is further improved. At the same time, an excessive external force acting on the front of the cab from the front of the vehicle is dispersed to each member more quickly. As a result, the plastic deformation of the cab can be further suppressed.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing a connected state of a front cross member, an inner rocker member, and a floor frame of a cab according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a portion A of FIG.

FIG. 3 is a perspective view of a main part of a connecting portion of a front cross member and an inner rocker member as viewed from the vehicle interior side.

FIG. 4 is a cross-sectional view taken along the line BB of FIG. 3 including a floor panel.

5 is an enlarged perspective view of a C portion of FIG.

6 is a cross-sectional view taken along line DD of FIG. 5, which includes a dash panel, a floor panel, and a mounting bracket.

7 is a sectional view taken along line EE of FIG.

FIG. 8 is a perspective view of a cab.

[Explanation of symbols]

10 trucks (vehicles) 11 cabs 12 dash panel 13 floor panels 14 Front cross member 16,17 Innarocca member 18,19 floor frame 27 Inner Pillar 28 mounting bracket P Floor frames 18 and 19 axis Q Front cross member 14 axis

Continued front page    (72) Inventor Makoto Uda             3-1, Hinodai, Hino City, Tokyo 1 Hino             Inside the automobile corporation F-term (reference) 3D003 AA01 BB03 BB09 BB10 CA02                       CA09

Claims (5)

[Claims] 1. A dash panel (1) forming a front wall of a passenger compartment.
2) a front cross member (14) provided on the lower surface of the floor panel (13) and extending in the vehicle width direction, and the front and rear of the vehicle (10) on the lower surface of the side edge of the floor panel (13). A cab structure of a vehicle including an inner rocker member (16, 17) provided extending in a direction, wherein a front end of the inner rocker member (16, 17) is provided at an end portion of the front cross member (14). Vehicle cab structure characterized by being connected. 2. A floor frame (18, 19) provided on the lower surface of the floor panel (13) extending in the front-rear direction of the vehicle (10), the front end of the floor frame (18, 19) being a front cross. The vehicle cab structure according to claim 1, wherein the cab structure is connected to the rear surface of the member (14). 3. The axis of the front cross member (14) is located on the extension of the axis (P) of the floor frame (18, 19) extending forward.
The vehicle cab structure according to claim 2, wherein the (Q) is located. 4. The vehicle cab structure according to claim 2 or 3, wherein a mounting bracket (28) is mounted from a lower surface of the front cross member (14) to a lower surface of the floor frame (18, 19). 5. The outer surface of the inner rocker member (16, 17) is opened, and the inner pillar (27) is fixed to the outer surface of the front portion of the inner rocker member (16, 17), and the inner rocker member (16, 17) is fixed. 17) The cross section of the front portion is formed as a closed cross section.
The vehicle cab structure described.