JP2584501Y2 - Car body 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 vehicle body structure.

[0002]

2. Description of the Related Art As this kind of technique, for example, there is one shown in FIGS. 7 and 8 (see Japanese Utility Model Laid-Open No. 59-129676). That is, as a vehicle body structure of an automobile, a tunnel portion 2 formed to protrude from a floor panel 1 and a drive system disposed in the vehicle front-rear direction F-RE so as to be spaced apart from the lower side of the tunnel portion 2. A propeller shaft 3 as a member, an exhaust pipe 4 as an exhaust system member disposed below the propeller shaft 3 in the vehicle front-rear direction F-RE, and a pump shaft disposed between the propeller shaft 3 and the exhaust pipe 4. A heat shield plate 8 having a substantially hat-shaped cross section and a side flange 5 forming the hat shape is fixed to the floor panel 1 by bolts 6 and nuts 7. The protrusion 9 formed on the heat shield plate 8 is set in the vehicle left-right direction L-RA. Reference numeral 10 denotes a through hole of the bolt 6.

[0003]

However, in such a vehicle body structure, since the projection 9 is set in the left-right direction L-RA of the vehicle, an extra dimension of the projection 9 and the propeller shaft 3 are required. A clearance with the heat shield plate 8 must be ensured. As a result, it is necessary to increase the size of the tunnel section 2 toward the passenger compartment side, which impairs occupant comfort.

Further, since the projection 9 is set in the left-right direction L-RA of the vehicle, the air flow on the exhaust pipe 4 is disturbed, the air resistance (Cd value) is increased, and the aerodynamic performance is reduced. In addition, the high-temperature air generated from the exhaust pipe 4 may be retained, and the propeller shaft 3 and the floor panel 1 may be exposed to high temperatures. Therefore, an object of the present invention is to provide a vehicle body structure that improves occupant comfort and improves aerodynamic performance.

[0005]

The vehicle body structure of the present invention includes a tunnel formed on a floor panel,
A drive system member disposed in the vehicle front-rear direction within the tunnel portion, an exhaust system member disposed below the drive system member in the vehicle front-rear direction, and disposed between the drive system member and the exhaust system member. In a vehicle body structure having a substantially hat-shaped cross section and a heat shield plate having flanges on both sides fixed to the floor panel, the heat shield plate is disposed on an upper surface at a position outside the range of the drive system member in a vehicle front-rear direction. And the front and rear ends of the heat shield plate are connected to the drive system unit.
Material, and the flanges on both sides are
It is characterized by being fixed to the floor panel .

[0006]

According to this structure, since the heat shield plate is formed with a projection extending in the vehicle front-rear direction on the upper surface at a position outside the range of the drive system member, the clearance between the drive system member and the heat shield plate is conventionally reduced. Can be made smaller than the size of As a result ,
The size of the tunnel can be reduced, and occupant comfort can be improved. At this time, the height of the projection does not change as compared with the height of the conventional projection. Further, since the air on the exhaust system member is smoothly guided to the rear of the vehicle , the air resistance (Cd
Value) is small, and aerodynamic performance can be improved. Further, since the front and rear end portions of the heat shield plate are fixed to the drive system member, the heat shield plate swings together with the drive system member. Therefore, it is not necessary to increase the clearance between the heat shield plate and the drive system member in consideration of interference with the heat shield plate due to the swing of the drive system member. As a result, the clearance between the heat shield plate and the drive system member can be increased. Can be smaller. In addition, vibration input to the heat shield
Is the elastic deformation of the protrusions mainly arranged in the front-rear direction of the vehicle.
Absorbed by the shape, especially the relative displacement of the heat shield plate
There is no need to separately add an absorbing structure. In addition, heat shield
Between the floor panel and the floor panel
Transmission of vibration to the panel can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. The same members as those in the conventional example are denoted by the same reference numerals, and overlapping description will be omitted. As a body structure of an automobile, a tunnel portion 2 formed to be raised on a floor panel 1 is provided.
A drive system member disposed in the vehicle front-rear direction F-RE spaced apart below the inside of the tunnel portion 2 and an exhaust system disposed in the vehicle front-rear direction F-RE below the drive system member A member and a side flange 5 which is disposed between the drive system member and the exhaust system member and has a substantially hat shape in cross section and forms the hat shape are cushioned by bolts 6 and nuts 7 on the floor panel 1. And a heat shield plate 16 fixedly provided with the members 21 and 21 interposed therebetween.

The drive system members of the present invention include a transmission 11, a propeller shaft 3, a joint 12 connecting the transmission 11 and the propeller shaft 3, and center bearings 13 and 13 'for supporting the propeller shaft 3. A rear propeller shaft 15 connected to the propeller shaft 3 via the center bearings 13 and 13 'and a joint 14.
And

The exhaust system member according to the present invention includes the exhaust pipe 4 and the catalyzer 17 communicating with the exhaust pipe 4. The heat shield plate 16 is formed with projections 18, 18, 18, 18 extending in the vehicle front-rear direction F-RE on the upper surface at a position outside the range of the drive system member, and is formed substantially at the center of the front and rear ends. Through hole 19,
The transmission 19 and the center bearing 13 serving as the drive system members are fixedly attached to the transmission 11 and the center bearing 13 with bolts 20.

According to this embodiment, the heat shield plate 16 is provided on the upper surface at a position outside the range of the drive system member in the vehicle longitudinal direction F.
Since the projections 18, 18, 18, 18 extending to -RE are formed, the clearance L between the drive system member and the heat shield plate 16 can be made smaller than the conventional dimension l. As a result, the size of the tunnel portion 2 can be reduced, and the comfort of the occupant can be improved. At this time, the height t 'of the projection does not change as compared with the height t of the conventional projection. Further, since the air on the exhaust system member is smoothly guided to the rear of the vehicle, the air resistance (C
d value) is reduced, and aerodynamic performance can be improved. Further, the through hole 1 is provided at a substantially central portion of the front and rear ends of the heat shield plate 16.
The heat shield plate 16 swings together with the drive system member because the heat shield plate 16 is fixed to the drive system member by bolts 20 with the intermediaries 9 and 19 interposed therebetween. Therefore, it is not necessary to increase the clearance between the heat shield plate 16 and the drive system member in consideration of the interference with the heat shield plate 16 due to the swing of the drive system member. The clearance L can be smaller than the conventional dimension l.

[0011]

As described above, according to the present invention, as a vehicle body structure of a vehicle, a tunnel formed on a floor panel, a drive system member arranged in the vehicle front-rear direction in the tunnel, and An exhaust system member disposed below the drive system member in the front-rear direction of the vehicle; a substantially hat-shaped cross-section disposed between the drive system member and the exhaust system member, and both side flanges fixed to the floor panel; The heat shield plate is formed with a protrusion extending in the vehicle front-rear direction on the upper surface at a position outside the range of the drive system member, and the front and rear of the heat shield plate. The end is
It is fixed to the drive system member, and the flanges on both sides
Since it is fixed to the floor panel through the interposition, the clearance between the drive system member and the heat shield plate can be reduced, so that the tunnel portion can be reduced in size, and passengers can feel comfortable.
Suitability can be improved. In addition, the air above the exhaust system members
Since the air is smoothly guided to the rear of the vehicle, the air resistance (Cd
Value) becomes smaller and aerodynamic performance can be improved.
You. Further, since the front and rear end portions of the heat shield plate are fixed to the drive system member, the heat shield plate swings together with the drive system member.
It is necessary to increase the clearance between the hot plate and the drive system members.
As a result , the clearance between the heat shield plate and the drive system member can be further reduced. Also, the vibration input to the heat shield
Because it is absorbed by the elastic deformation of the projection, the heat shield plate
In particular, there is no need to add a separate structure to absorb relative displacement
No. In addition, the buffer interposed between the heat shield and the floor panel
Prevent transmission of vibration to floor panel by material
The practical effect that can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view taken along a line YA in FIG. 1;

FIG. 3 is a sectional view taken along line SA-SA of FIG. 1;

FIG. 4 is a sectional view taken along line SB-SB in FIG. 1;

FIG. 5 is a sectional view taken along line SC-SC of FIG. 1;

FIG. 6 is a perspective view of the heat shield of FIG. 1;

FIG. 7 is a sectional view corresponding to FIG. 3 of a conventional example.

FIG. 8 is a perspective view of the heat shield of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor panel 2 Tunnel part 3 Propeller shaft (drive system member) 11 Transmission (drive system member) 12 Joint (drive system member) 13 Center bearing (drive system member) 14 Joint (drive system member) 15 Rear propeller shaft (drive system) 4) Exhaust pipe (exhaust system member) 17 Catalyzer (exhaust system member) 8 Heat shield plate 16 Heat shield plate 5 Side flange 18 Projection

Claims (1)

(57) [Scope of request for utility model registration] 1. A tunnel formed in a floor panel, a drive system member disposed in the vehicle front-rear direction within the tunnel, an exhaust system member disposed below the drive system in a vehicle front-rear direction, A heat shield plate disposed between the drive system member and the exhaust system member, the heat shield plate having a substantially hat-shaped cross-section and having flanges on both sides fixed to the floor panel; Formed on the upper surface at a position outside the range of the drive system member, a protrusion extending in the vehicle front-rear direction ,
The front and rear ends of the heat shield plate are fixed to the drive system member,
The flanges on both sides are connected to the floor panel via cushioning material.
An automobile body structure which is fixedly provided .