JPH05131953A - Car body structure for automobile - Google Patents

Abstract

PURPOSE:To provide the car body structure of an automobile wherein, coupling rigidity between a pillar and a chassis frame is improved, through simple constitution, the generation of car room noise owing to vibration of a pillar is reduced, and safety of a car room during side collision is improved. CONSTITUTION:A mount bracket 30 coupled to the under surface, corresponding to the lower end part of a center pillar 20, of a floor panel 15 and the inner end part of a side sill 11 is provided. A sheet mounting bracket 50, forming closed section structure in cooperation of the floor panel 15, is arranged in the position of the mount bracket 30 and on the upper surface of the floor panel 15. A support bracket 40 positioned facing the mount bracket 30 is disposed to the side frame 2 of a chassis frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of an automobile, and more particularly to a vehicle body structure of an automobile with a chassis frame in which a body body is joined to a chassis frame.

[0002]

2. Description of the Related Art In recent years, as off-road vehicles, various automobiles with a chassis frame in which a body body is joined to a chassis frame have been developed and commercialized. The body body of the vehicle with the chassis frame is, like the body body of the vehicle of the monocoque structure, a pair of left and right side sills having a closed cross section extending in the front-rear direction, and left and right end portions are respectively coupled to the upper end portions of the left and right side sills. Floor panel,
The body main body is provided with a pair of left and right pillars having a closed cross section, which are vertically connected to the left and right side sills, respectively, and the body body is provided with a plurality of mounting brackets provided at appropriate intervals in the front-rear direction at the lower portions of the left and right side portions. And is connected to the chassis frame via a plurality of support brackets provided on the chassis frame. Usually, the upper ends of the left and right pillars are respectively coupled to a pair of roof side rails at the left and right ends of the roof panel.

[0003]

In the conventional vehicle with the chassis frame, the mount bracket is provided at a position separated from the pillar, and the lower end portion of the pillar and the chassis frame are not directly coupled to each other.
The rigidity of the connection between the pillar and chassis frame is low.Therefore, the impact force when opening and closing the door and the vibration input transmitted from the suspension and engine during running causes the pillar to vibrate slightly, resulting in vehicle interior noise due to the vibration of the pillar. There is a problem that occurs. Further, when the impact load at the time of a side collision is very large, the pillar may be deformed. Therefore, it is desirable to increase the coupling rigidity between the pillar and the chassis frame in order to improve the safety with respect to the passenger compartment.

An object of the present invention is to increase the joint rigidity between the pillar and the chassis frame with a simple structure, reduce the vehicle interior noise caused by the vibration of the pillar, and enhance the safety for the vehicle interior during a side collision. The purpose of the present invention is to provide a car body structure for an automobile.

[0005]

According to a vehicle body structure of an automobile according to a first aspect of the present invention, a pair of left and right side sills having a closed cross section extending in the front-rear direction and left and right end portions are respectively connected to upper end portions of the left and right side sills. A plurality of body brackets provided with a floor panel and a pair of left and right pillars having a closed cross section, which are vertically connected to the left and right side sills, respectively, and a plurality of mount brackets provided under the body body and a plurality of chassis brackets provided on the chassis frame. In a vehicle body structure of an automobile with a chassis frame coupled via support brackets, a pair of left and right mounting brackets coupled to a lower surface of a floor panel corresponding to a lower end portion of the pillar and an inner end portion of a side sill are provided. A pair of left and right support brackets corresponding to a pair of mount brackets are provided.

According to a second aspect of the present invention, there is provided a vehicle body structure according to the first aspect, wherein the support member forms a closed sectional structure with the floor panel at a position of the mount bracket corresponding to a lower end portion of the pillar. Is connected to the upper surface of the floor panel and at least one of the side sill and the inner wall surface of the lower end of the pillar.

A vehicle body structure according to a third aspect of the present invention is the vehicle body structure according to the second aspect, wherein the support member is constituted by a cross member provided on a floor panel in the vehicle width direction. ..

According to a fourth aspect of the present invention, there is provided the vehicle body structure according to the second aspect, wherein the support member is provided with a seat mounting portion for mounting a seat.

A vehicle body structure according to a fifth aspect of the present invention is the vehicle body structure according to the third aspect, wherein upper ends of the left and right pillars are respectively coupled to a pair of roof side rails at the left and right ends of the roof panel. The roof panel is provided with a roof cross member extending between the pair of left and right roof side rails at a position corresponding to the upper ends of the pair of left and right pillars.

[0010]

In the vehicle body structure of the automobile according to claim 1,
The lower ends of the left and right pillars are connected to the chassis frame via a mounting bracket connected to the lower surface of the floor panel corresponding to the lower ends of the pillars and the inner end of the side sill, and a support bracket corresponding to the mounting bracket. .. Since the mount bracket is provided so as to correspond to the lower end of the pillar, the mount bracket can be effectively used to increase the joint rigidity between the lower end of the pillar and the chassis frame. Therefore, the pillars are less likely to make a slight vibration due to the impact force at the time of opening / closing the door or the vibration input transmitted from the suspension or the engine at the time of traveling, and the vehicle interior noise due to the vibration of the pillars can be reduced. Further, even when the impact load at the time of a side collision is very large, it is possible to prevent the pillars from being deformed, and it is possible to enhance the safety for the passenger compartment.

In the vehicle body structure of the automobile according to the second aspect, basically the same action as that of the first aspect can be obtained. In addition, at the position of the mount bracket corresponding to the lower end of the pillar, a support member that forms a closed cross-section structure with the floor panel is connected to the floor panel upper surface and at least one of the side sill or the pillar lower end inner wall surface. The joint rigidity between the floor panel and the mount bracket can be enhanced, and the joint rigidity between the lower end of the pillar and the chassis frame can be further enhanced. Therefore, minute vibration of the pillar due to the vibration input can be prevented, the vehicle interior noise can be further reduced, and the safety for the vehicle interior at the time of a side collision can be further enhanced.

In the vehicle body structure according to the third aspect, the same operation as that of the second aspect can be basically obtained. In addition, since the support member is constituted by the cross member provided on the floor panel in the vehicle width direction, the cross member can be effectively utilized to enhance the joint rigidity between the lower end portion of the pillar, the floor panel and the mount bracket. In addition, the bending and torsional rigidity of the body can be improved.

In the vehicle body structure according to the fourth aspect, the same operation as that of the second aspect can be basically obtained. In addition, since the seat mounting portion for mounting the seat seat is provided on the support member, the support rigidity of the seat seat can be increased, and the safety of the occupant in a secondary collision at the time of a collision can be enhanced.

In the vehicle body structure according to the fifth aspect, basically the same operation as the third aspect can be obtained. In addition, the upper ends of the left and right pillars are respectively coupled to the pair of roof side rails at the left and right ends of the roof panel, and the pair of left and right roof side rails are attached to the roof panel at the positions corresponding to the upper ends of the pair of left and right pillars. Since the roof cross member spanning between the rails is provided, a strength member that goes around the body body is set, and the left and right pillars, the cross member, and the roof cross member act as a node that divides the vehicle interior space into front and rear, Thereby, the bending rigidity and the torsional rigidity of the body can be remarkably enhanced, and the coupling rigidity between the upper end portion of the pillar and the roof panel can be enhanced. Therefore, the vehicle interior noise caused by the vibration of the pillars can be further reduced, and the safety for the vehicle interior at the time of a side collision can be further enhanced.

[0015]

According to the present invention, the following effects can be obtained as described in the section of operation. According to the vehicle body structure of the first aspect of the invention, since the mount bracket is provided so as to correspond to the lower end portion of the pillar, the mount bracket can be effectively utilized to increase the joint rigidity between the lower end portion of the pillar and the chassis frame. I can. Therefore, the pillars are less likely to make a slight vibration due to the impact force at the time of opening / closing the door or the vibration input transmitted from the suspension or the engine at the time of traveling, and the vehicle interior noise due to the vibration of the pillars can be reduced. Also, even if the impact load at the time of a side impact is very large,
It is possible to prevent the pillars from being deformed, and it is possible to enhance the safety of the passenger compartment.

According to the vehicle body structure of the second aspect of the invention, basically the same effect as that of the first aspect can be obtained. In addition, since a support member that forms a closed cross-section structure with the floor panel is provided at the position of the mount bracket corresponding to the lower end of the pillar, it is possible to increase the joint rigidity between the lower end of the pillar, the floor panel, and the mount bracket. It is possible to further increase the joint rigidity between the lower end of the pillar and the chassis frame. Therefore, minute vibration of the pillar due to the vibration input can be prevented, the vehicle interior noise can be further reduced, and the safety for the vehicle interior at the time of a side collision can be further enhanced.

According to the vehicle body structure of the third aspect, basically the same effect as that of the second aspect can be obtained. In addition, since the support member is constituted by the cross member provided on the floor panel in the vehicle width direction, the cross member can be effectively utilized to enhance the joint rigidity between the lower end portion of the pillar, the floor panel and the mount bracket. In addition, the bending and torsional rigidity of the body can be improved.

According to the vehicle body structure of the automobile of the fourth aspect, the same effect as that of the second aspect can be basically obtained. In addition, since the seat mounting portion for mounting the seat seat is provided on the support member, the support rigidity of the seat seat can be increased, and the safety of the occupant in a secondary collision at the time of a collision can be enhanced.

According to the vehicle body structure of the fifth aspect, basically the same effect as that of the third aspect can be obtained. In addition, since a roof cross member extending between the pair of left and right roof side rails is provided on the roof panel at a position corresponding to the upper ends of the pair of left and right pillars, a strength member that goes around the body is set. The left and right pillars, the cross member, and the roof cross member act as nodes that divide the vehicle interior space into front and rear, which can significantly increase the bending rigidity and the torsional rigidity of the body, and the upper end of the pillar and the roof panel. The joint rigidity with can be improved. Therefore, the vehicle interior noise caused by the vibration of the pillars can be further reduced, and the safety for the vehicle interior at the time of a side collision can be further enhanced.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment applies the present invention to a vehicle body structure of an automobile with a chassis frame. The front and rear and left and right sides of the vehicle body will be defined for description. As shown in FIG. 1, a chassis frame 1 is provided on the lower side of a body body 10 of an automobile, and left and right sides of the chassis frame 1 extend from the front end portion to the rear end portion of the body body 10. A pair of side frames 2 is provided, and five mount brackets 30 are provided in a lower portion on both left and right sides of the body body 10 so as to project inward in the vehicle width direction. Five corresponding support brackets 40 are provided so as to project outward in the vehicle width direction, respectively.
Are elastically supported by the chassis frame 1 by connecting the mount brackets 30 to the corresponding support brackets 40 via cushion members 45 (see FIG. 3).

Next, the structure around the lower end portions of the left and right center pillars 20 of the body 10 will be described in detail.
Since the structure is symmetrical, the structure around the lower end portion of the right center pillar 20 will be described. As shown in FIGS. 2 and 3, a side sill 11 arranged outside the side frame 2 of the chassis frame 1 is provided at a lower portion of the right side portion of the body body 10. The side sill 11 includes the side sill inner 12 and the side sill. The floor panel 15 is formed in a closed cross-section with the outer 13, and the floor panel 15 is joined to a portion near the upper end of the side sill inner 12 by a flange portion 15b provided at the right end portion thereof. On the side sill 11, a center pillar 20 having a closed cross section formed by a center pillar inner 21 and a center pillar outer 22 is erected upright, and the center pillar inner 21 has an extension portion 21 a extending below the center pillar outer 22. The extension portion 21a is formed between the side sill inner 12 and the side sill outer 13 and is coupled to the upper and lower coupling flange portions 11a of the side sill 11, while the lower end of the center pillar outer 22 is coupled to the side sill outer 13. ing. In this way, a closed cross-section structure is formed by connecting the extension portion 21a of the center pillar inner 21 to the side sill 11.

A mount bracket 30 is provided below the floor panel 15 corresponding to the lower end of the center pillar 20, and a support bracket 4 is provided on the side frame 2 of the chassis frame 1 corresponding to the mount bracket 30.
0 is provided, and the floor panel 15 is provided at the position of the mount bracket 30 corresponding to the lower end of the center pillar 20.
A seat mounting bracket 50 (which corresponds to a supporting member) is provided on the upper side of the. As shown in FIG.
The mount bracket 30 provided so as to correspond to the lower end of the center pillar 20 has a pair of front and rear vertical wall portions 31, an upper wall portion 32 having bolt holes 32a, and outer end portions of the front and rear vertical wall portions 31. The flange portion 31a and the upper wall portion 3 formed respectively
2 and a flange portion 32b formed at the outer end portion of the mount bracket 30. The mount bracket 30 is disposed with its upper wall portion 32 in contact with the lower surface of the floor panel 15, and
The front and rear flange portions 31a are joined to the side sill inner 12, and the flange portion 32b is joined to the flange portion 15b of the floor panel 15. As shown in FIG. 3, a bolt hole 15a corresponding to the bolt hole 32a of the mount bracket 30 is formed in the floor panel 15, and a nut 18 is fixed in correspondence with the bolt hole 15a.

As shown in FIG. 3, the mounting bracket 3
The support bracket 40 corresponding to 0 includes a pair of front and rear vertical wall portions 41, an upper wall portion 42 having bolt holes 42a corresponding to the bolt holes 32a of the mount bracket 30, and inner end portions of the front and rear vertical wall portions 41. The front and rear vertical wall portions 41 are formed at a distance smaller than the front and rear vertical wall portions 31 of the mount bracket 30. Is connected to the side frame 2 at the flange portion 41a. Also,
Rubber cushion members 45 having bolt insertion holes 45a corresponding to the bolt holes 42a are fixed to the upper surface and the lower surface of the upper wall portion 42 of the support bracket 40, respectively. A nut 48 is fixed via the member 46 so as to correspond to the bolt insertion hole 45a.

As shown in FIG. 3, the seat mounting bracket 50 includes a box-shaped bracket main body 51 having an open lower end and an outer end, and flange portions formed on the lower end peripheral portion and the outer end peripheral portion of the bracket main body 51, respectively. 51a and 51b are provided, a bolt hole 52a corresponding to the bolt hole 15a of the floor panel 15 is formed in the front portion of the upper wall portion 52 of the bracket main body 51, and a bolt hole 52a is formed in the rear portion of the upper wall portion 52 of the bracket main body 51. ,
A seat mounting portion 55 is formed so as to project upward, and a bolt hole 55a for mounting the seat supporting member 56 is formed in the seat mounting portion 55. The flange portion 51 a of the seat mounting bracket 50 is joined to the upper surface of the floor panel 15, and the flange portion 51 b is the side sill inner 12.
The seat mounting bracket 50 and the floor panel 15 form a closed sectional structure.

As shown in FIG. 3, the support bracket 40 is projected into the mount bracket 30 corresponding to the lower end of the center pillar 20, and the upper cushion member 4 is provided.
5 is disposed so as to contact the lower surface of the upper wall portion 32 of the mount bracket 30, and the bolt 5 is attached to the upper and lower cushion members 45 from the bolt holes 52a of the seat mounting bracket 50.
8 and insert the bolt 58 into the upper and lower nuts 1
Mount bracket 3 by fastening with 8.48
0 and the support bracket 40 are connected via a cushion member 45.

Next, the structure around the upper ends of the center pillars 20 on the left and right of the body 10 will be described. Since the structure is symmetrical, the structure around the upper end of the right center pillar 20 will be described. As shown in FIGS. 5 and 6, the roof panel 60 at the upper end of the body body 10 includes a roof panel body 61 and a roof side rail 62 arranged at the right end portion of the roof panel body 61. , The roof side inner 63 and the roof side outer 64 are formed in a closed cross-sectional shape. As shown in FIG. 7, the upper end of the center pillar 20 has a roof side rail 6
Is bound to 2. A roof cross member 65 having a U-shaped cross section is arranged in the vehicle width direction at a position corresponding to the upper end portion of the center pillar 20 in the roof panel body 61, and the flange portion 65a at the right end of the roof cross member 65 is a roof panel. The roof panel body 61 and the roof cross member 65 are joined to the flange portion 61 a of the body 61 to form a closed cross-section structure. The roof panel main body 61 and the roof cross member 65 thus joined together have the roof side rail 62 at the flange portions 61a and 65a.
Is connected to the connecting flange portion 62a. Incidentally, reference numeral 6
6 is a Mohikan rail on which a seal member is arranged,
Reference numeral 67 is a cushion member mounted between the roof panel body 61 and the roof cross member 65.

Next, the operation of the vehicle body structure of the automobile will be described. The mount bracket 30 and the seat mounting bracket 50 are provided at the portions corresponding to the lower ends of the left and right center pillars 20, and the left and right center pillars 20 are provided.
Since the roof cross member 65 extending between the pair of left and right roof side rails 62 is provided on the roof panel 60 at a position corresponding to the upper end of the, the joint rigidity between the center pillar 20, the chassis frame 2 and the roof panel 60 is significantly increased. Can be raised. Therefore, it is possible to prevent the center pillar 20 from vibrating due to an impact input when the door is opened or closed and a vibration input transmitted from the suspension or the engine when the vehicle is running, so that the vehicle interior noise caused by the vibration of the center pillar 20 is significantly reduced. Can be reduced to Further, by increasing the joint rigidity of the center pillar 20, the chassis frame 2 and the roof panel 60, it is possible to prevent the center pillar 20 from being deformed even when the impact load at the time of a side collision is very large. The safety for the passenger compartment can be significantly improved. Furthermore, the seat mounting bracket 5
The seat mounting portion 55 is provided at 0, and the seat seat is mounted via the seat mounting portion 55, so that the supporting rigidity of the seat seat can be increased and the safety of the occupant at the time of a collision can be improved. ..

Next, a modified example of the vehicle body structure of the automobile will be described. It should be noted that the same members as those in the above-described embodiment will be described with the same reference numerals. As shown in FIG. 8, in the present modified example, instead of the seat mounting bracket 50, a cross member 70 is provided on the floor panel 15 in the vehicle width direction. The cross member 70 includes the front and rear flange portions 7
0a is coupled to the upper surface of the floor panel 15, and the cross member 70 and the floor panel 15 form a closed cross-section structure. A seat attachment portion 75 is provided on the upper wall portion 71 of the cross member 70. By thus providing the cross member 70, the cross member 70
Center pillar 20 and chassis frame 2
The joint rigidity with can be improved. Further, the left and right center pillars 20, the roof cross member 65, and the cross member 70 form a strength member that goes around the body main body 10, so that the bending rigidity and the torsional rigidity of the body main body 10 can be significantly increased. The seat mounting bracket 50 or the cross member 70 may be directly connected to the inner wall surface of the lower end portion of the center pillar 20 without the side sill inner 12, or may be connected to both the inner wall surface of the lower end of the center pillar 20 and the side sill inner 12. It is possible to do it. Also,
The vehicle body structure is not limited to the portion of the vehicle body corresponding to the center pillar 20, but may be provided in the portion of the vehicle body corresponding to the front pillar.

[Brief description of drawings]

FIG. 1 is a perspective view of an automobile with a chassis frame.

FIG. 2 is a perspective view showing a structure around a lower end portion of a center pillar.

FIG. 3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a perspective view of a mount bracket.

FIG. 5 is a perspective view showing a structure around an upper end portion of a center pillar.

6 is a view taken in the direction of arrow 6 in FIG.

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

FIG. 8 is a view corresponding to FIG. 2 showing a vehicle body structure according to a modification.

[Explanation of symbols]

 1 Chassis Frame 10 Body Body 11 Side Sill 15 Floor Panel 20 Center Pillar 30 Mounting Bracket 40 Support Bracket 50 Seat Mounting Bracket 55 Seat Mounting Section 60 Roof Panel 62 Roof Side Rail 65 Roof Cross Member 70 Cross Member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuji Matsumura 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Motor Corporation

Claims (5)

[Claims] 1. A pair of left and right side sills having a closed cross-section extending in the front-rear direction, a floor panel whose left and right ends are respectively coupled to the upper and lower end portions of the left and right side sills, and vertically joined to the left and right side sills. Body structure of an automobile with a chassis frame in which a body main body having a pair of left and right pillars having a closed cross section is coupled via a plurality of mounting brackets provided at the lower part thereof and a plurality of support brackets provided at the chassis frame In the above, a pair of left and right mount brackets connected to the lower surface of the floor panel corresponding to the lower end of the pillar and the inner end of the side sill are provided, and a pair of left and right support brackets corresponding to these one pair of mount brackets are provided. A vehicle body structure characterized by being provided. 2. A support member that forms a closed cross-section structure with the floor panel at a position of the mount bracket corresponding to the lower end of the pillar is coupled to the floor panel upper surface and at least one of the side sill and the pillar lower end inner wall surface. The vehicle body structure of the automobile according to claim 1. 3. The vehicle body structure according to claim 2, wherein the support member is formed of a cross member provided on a floor panel in a vehicle width direction. 4. A vehicle body structure according to claim 2, wherein a seat mounting portion for mounting a seat is provided on the support member. 5. The upper ends of the left and right pillars are respectively coupled to a pair of roof side rails at the left and right ends of the roof panel, and a pair of left and right roof panels is located at a position corresponding to the upper ends of the pair of left and right pillars. 4. A vehicle body structure according to claim 3, further comprising a roof cross member extending between the roof side rails.