JPH0655955U - Car body structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a vehicle body structure capable of reducing a clearance between a heat shield plate and a drive system member and improving aerodynamic performance. [Structure] Tunnel part 2 formed in floor panel 1
And drive system members 11, 12, 3, 13, 14, 15 arranged in the tunnel portion 2 in the vehicle front-rear direction F-RE,
Exhaust system members 4, 1 arranged in the vehicle front-rear direction F-RE below the drive system members 11, 12, 3, 13, 14, 15.
7 and the drive system members 11, 12, 3, 13, 14, 1
5 and the exhaust system members 4 and 17 are arranged between the exhaust system members 4 and 17 and have a substantially hat-shaped cross section. Both side flanges have a heat shield plate 16 fixed to the floor panel 1. A protrusion extending in the vehicle front-rear direction F-RE is formed on the upper surface of the drive system member 11, 12, 3, 13, 14, 15 outside the range, and the front and rear end portions of the heat shield plate 16 are formed. Is fixed to the drive system members 11 and 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle body structure.

[0002]

[Prior art]

 Examples of this type of technology include those shown in FIGS. 7 and 8 (see Japanese Utility Model Publication No. 59-129676). That is, as a vehicle body structure of an automobile, a tunnel portion 2 that is formed by being raised on a floor panel 1 and a drive unit that is arranged in the vehicle front-rear direction F-RE are separated from each other below the inside of the tunnel portion 2. Between the propeller shaft 3 as a system member, the exhaust pipe 4 as an exhaust system member arranged in the vehicle front-rear direction F-RE below the propeller shaft 3, and between the propeller shaft 3 and the exhaust pipe 4. The heat shield plate 8 is arranged on the floor panel 1 and fixed to the floor panel 1 with bolts 6 and nuts 7 so as to have a cross-section substantially hat shape and to form the hat shape. The protrusion 9 formed on the heat shield plate 8 is set in the vehicle left-right direction L-RA. Reference numeral 10 is a through hole of the bolt 6.

[0003]

[Problems to be solved by the device]

 However, in such a vehicle body structure, since the protrusion 9 is set in the vehicle left-right direction L-RA, an extra clearance between the propeller shaft 3 and the heat shield plate 8 is secured by the dimension of the protrusion 9. I have to do it. As a result, it was necessary to increase the size of the tunnel portion 2 toward the passenger compartment side, which impaired passenger comfort.

Further, since the protrusion 9 is set in the vehicle left-right direction L-RA, the flow of air on the exhaust pipe 4 is disturbed, air resistance (Cd value) increases, and aerodynamic performance deteriorates. 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 temperature. Therefore, an object of the present invention is to provide a vehicle body structure that improves passenger comfort and aerodynamic performance.

[0005]

[Means for Solving the Problems]

 The vehicle body structure of the present invention includes a tunnel portion formed on a floor panel, a drive system member disposed in the tunnel portion in the vehicle front-rear direction, and a drive system member disposed below the drive system member in the vehicle front-rear direction. A vehicle body structure having an exhaust system member and a heat shield plate which is disposed between the drive system member and the exhaust system member and has a substantially hat-shaped cross section, and both side flanges are fixed to the floor panel. In the above, the heat shield plate is characterized in that a protrusion extending in the vehicle front-rear direction is formed on the upper surface at a position outside the range of the drive system member. The front and rear ends of the heat shield plate are fixed to the drive system member.

[0006]

[Work]

 According to this structure, the heat shield plate is formed with a protrusion extending in the front-rear direction of the vehicle on the upper surface at a position outside the range of the drive system member. Can be made smaller than the size. As a result, the tunnel section can be downsized, and passenger comfort can be improved. At this time, the height of the protrusion is not different from the height of the conventional protrusion. Further, since the air on the exhaust system member is smoothly guided to the rear of the vehicle, the air resistance (Cd value) becomes small, and the aerodynamic performance can be improved. Further, since the front and rear ends 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 the interference with the heat shield plate due to the swing of the drive system member, and as a result, the clearance between the heat shield plate and the drive system can be made smaller. it can.

[0007]

【Example】

 An embodiment of the present invention will be described in detail below with reference to FIGS. The same parts as those in the conventional example are designated by the same reference numerals, and the duplicated description will be omitted. As a vehicle body structure of an automobile, a tunnel portion 2 formed by being raised on a floor panel 1, and a drive system member arranged in the vehicle front-rear direction F-RE spaced apart from the lower side of the tunnel portion 2 are provided. An exhaust system member disposed in the vehicle front-rear direction F-RE below the drive system member, and arranged between the drive system member and the exhaust system member to have a substantially hat-shaped cross section, and And a heat shield plate 16 fixed to the floor panel 1 by means of bolts 6 and nuts 7 with cushioning members 21, 21 interposed therebetween.

As the drive system member in the present invention, a transmission 11, a propeller shaft 3, a joint 12 connecting the transmission 11 and the propeller shaft 3, and a center bearing 13 · 13 for supporting the propeller shaft 3. ', And a rear propeller shaft 15 connected to the propeller shaft 3 with the center bearings 13 and 13' and the joint 14 interposed.

The exhaust system member in the present invention is composed of an exhaust pipe 4 and a 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 at the center of the front and rear ends thereof. The transmission 11 and the center bearing 13, which are the drive system members, are fixed by bolts 20 through the through holes 19, 19.

According to this embodiment, the heat shield plate 16 is formed with protrusions 18, 18, 18, 18 extending in the vehicle front-rear direction F-RE on the upper surface outside the range of the drive system member. Therefore, 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 tunnel portion 2 can be downsized, and passenger comfort can be improved. At this time, the height t'of the protrusion is not different from the height t of the conventional protrusion. Further, since the air on the exhaust system member is smoothly guided to the rear of the vehicle, the air resistance (Cd value) is reduced, and the aerodynamic performance can be improved. Further, since the heat shield plate 16 is fixedly mounted on the drive system member by the bolts 20 through the through holes 19 at the substantially central portions of the front and rear ends of the heat shield plate 16, the heat shield plate 16 swings together with the drive system member. To do. 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, and as a result, the heat shield plate 16 and the drive system member are separated from each other. The clearance L can be made smaller than the conventional dimension l.

[0011]

[Effect of device]

 As described above, according to the present invention, as a vehicle body structure of an automobile, a tunnel portion formed in a floor panel, a drive system member disposed in the tunnel longitudinal direction in the vehicle longitudinal direction, and a lower portion of the drive system member are provided. An exhaust system member disposed in the front-rear direction of the vehicle, and a heat shield plate that is disposed between the drive system member and the exhaust system member and has a substantially hat-shaped cross section, and both side flanges are fixed to the floor panel. In the vehicle body structure of an automobile having a heat shield plate, the heat shield plate is formed with a protrusion extending in the vehicle front-rear direction on an upper surface at a position outside the range of the drive system member. Can be reduced and aerodynamic performance can be improved. Further, since the front and rear ends of the heat shield plate are fixedly mounted on the drive system member, the clearance between the heat shield plate and the drive system member can be made smaller.

[Brief description of drawings]

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

FIG. 2 is a plan view taken along the arrow YA of FIG.

FIG. 3 is a sectional view taken along the line SA-SA in FIG.

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

5 is a cross-sectional view taken along the line SC-SC of FIG.

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

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

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

[Explanation 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 Member) Member) 4 Exhaust pipe (exhaust system member) 17 Catalyzer (exhaust system member) 8 Heat shield plate 16 Heat shield plate 5 Side flange 18 Protrusion

Claims (2)

[Scope of utility model registration request] 1. A tunnel portion formed on a floor panel, a drive system member arranged in the tunnel longitudinal direction of the vehicle, and an exhaust system member arranged below the drive system member in the vehicle longitudinal direction. A vehicle body structure for an automobile, comprising: a heat shield plate that is disposed between the drive system member and the exhaust system member, has a substantially hat-shaped cross section, and has side flanges fixed to the floor panel. Is a vehicle body structure for an automobile, characterized in that a protrusion extending in the vehicle front-rear direction is formed on an upper surface of the drive system member at a position outside the range. 2. The vehicle body structure according to claim 1, wherein front and rear end portions of the heat shield plate are fixed to the drive system member.