JP2003205870A - Floor structure for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure for an automobile capable of reducing a cost, reducing weight, and preventing easy bending of a center bearing mount bracket even when a load is inputted from the side such as in side impact. <P>SOLUTION: A center bearing 13 is held by the center bearing mount bracket 14, and arrangement position of the center bearing mount bracket 14 in a fore and aft direction and support position of third cross members 5 and 6 in the fore and aft direction are substantially matched. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automobile floor structure.

[0002]

2. Description of the Related Art As a conventional automobile floor structure, for example, a center bearing for suppressing vibration of a propeller shaft is provided with a center bearing mount bracket at a substantially middle portion of a propeller shaft connecting a transmission and a rear differential gear. As a floor structure, there is a floor structure in which a cross member is bridged between a floor tunnel, a floor panel, and a side sill (see JP 2001-277878 A).

[0003]

However, in such a conventional technique, the attachment piece of the center bearing mount bracket is attached to the lower end portion of the tunnel reinforcement arranged below the floor tunnel. Therefore, the vertical dimension from the center bearing to the mounting piece of the center bearing mount bracket becomes large, and when a side load such as a side collision is input, the center bearing mount bracket easily breaks, and Strength is reduced. In addition, manufacturability in press molding of the center bearing mount bracket decreases.

The present invention has been made by paying attention to such a conventional technique, and the center bearing mount bracket is hard to break even if a load from the side such as a side collision is input, the cost can be reduced, and the weight is light. It is intended to provide a floor structure for an automobile that can be realized.

[0005]

According to a first aspect of the present invention, a propeller is provided in a space formed by the floor tunnel, the cross member being bridged between the floor tunnel, the floor panel and the side sill. A floor structure for an automobile, in which a shaft is supported by a floor panel via a center bearing mount bracket and a tunnel reinforcement, wherein the center bearing is held by the center bearing mount bracket and the front and rear positions of the center bearing mount bracket are arranged. When,
The front and rear positions of support of the cross member are substantially matched.

According to the first aspect of the invention, since the front and rear positions of the center bearing mount bracket and the front and rear positions of the cross member are substantially aligned with each other, the load from the side can be endured. As a result, the cost reduction and weight reduction can be achieved because the reinforcing member that has been conventionally required is no longer needed. Also, the input load at the time of side collision can be transmitted through the cross member and the center bearing mount bracket itself can be used as the cross section of the cross member. Therefore, it is possible to maintain the rigidity and strength in the lateral direction, which is the same level as the conventional one.

According to a second aspect of the present invention, the center bearing is formed with a projecting cross section in the floor tunnel, and the mounting positions of the center bearing mount bracket and the tunnel reinforcement are set to the height of the cross member. I tried to fit within the range of direction.

According to the second aspect of the present invention, since the center bearing is formed in the floor tunnel with a projecting cross section, the center bearing has high rigidity and strength in the lateral direction of the automobile, By adjusting the mounting positions of the center bearing mount bracket and the tunnel reinforcement within the range of the cross member in the height direction, the manufacturability during press molding is improved.

According to a third aspect of the present invention, the center bearing is covered by a center bearing mount bracket, and the center bearing mount bracket is
It has a convex cross section covered by a tunnel reinforcement that is fixed to the floor tunnel.

According to the third aspect of the present invention, by covering the center bearing, the cross section of the center bearing can be used as a reinforcing member at the time of a side collision, and the strength can be further improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are views showing an embodiment of the present invention. Floor structure 1 for automobile is floor tunnel 4
And floor panels 2 and 3 supported on both sides of the floor tunnel 4, and third cross members 5 and 6 which are “cross members” bridged between the floor tunnel 4 and a well-known side sill (not shown). , A propeller shaft 11 arranged in the space 4a defined by the floor tunnel 4,
Tunnel reinforcement 9 in which 12 is supported by floor panels 2 and 3, and support portions 14a and 14a with cushioning members 15 and 15 interposed at the lower end of the tunnel reinforcement 9.
Is supported by the center bearing mount bracket 14. Reference numeral 10 is also a tunnel reinforcement, but it is not provided at a position facing the center bearing mount bracket 14.

The flanges 5a, 6a of the third cross members 5, 6 facing the both sides of the floor tunnel 4 are supported on both sides of the floor tunnel 14 by welding. Reference numerals 7 and 8 are second cross members formed by bridging between the floor tunnel 4 and a well-known side sill (not shown). The flanges 7a and 8a facing the both sides of the floor tunnel 4 of the second cross members 7 and 8 are It is supported by welding on both sides of the floor tunnel 14.

The center bearing mount bracket 14 holds the center bearing 13 arranged between the propeller shafts 11 and 12. The center bearing mount bracket 14 is provided at the front and rear positions of the center bearing mount bracket 14 and the third cross member 5, The front and rear positions of 6 are substantially matched.

The center bearing 13 is formed in the space 4a of the floor tunnel 4 in a projecting cross section,
The mounting positions of the center bearing mount bracket 14 and the tunnel reinforcement 9 are set between the uppermost surface position L1 and the lowermost surface position L2 of the third cross members 5 and 6, that is, within the range in the height direction. .

The center bearing 13 is covered with a center bearing mount bracket 14, and the center bearing mount bracket 14 has a convex cross section covered with a tunnel reinforcement 9 fixed to the floor tunnel 4.

Next, the operation of this embodiment will be described.

In this embodiment, since the front and rear positions of the center bearing mount bracket 14 and the front and rear positions of the third cross members 5 and 6 are substantially aligned with each other, the load from the side can be endured. As a result, the cost reduction and weight reduction can be achieved because the reinforcing member that has been conventionally required is no longer needed.

The input load at the time of side collision is transmitted through the third cross members 5 and 6, and the center bearing mount bracket 14 itself is the third cross members 5 and 6.
Since it can be used as a cross section, the load can be released from one side to the other side, and since it has a function as a reinforcing member at the time of a side collision, it is possible to maintain the rigidity and strength in the lateral direction similar to the conventional one.

The center bearing 13 is formed in the floor tunnel 4 so as to have a projecting cross section, so that the center bearing 13 has high rigidity and strength in the lateral direction of the automobile, and the center bearing mount bracket 14 and the tunnel reinforcement. 9 is attached to the third cross member 5,
By adjusting the height within the range of 6 in the height direction, the manufacturability at the time of press molding was improved.

By covering the center bearing 13 with the center bearing mount bracket 14, its cross section can also be used as a reinforcing member in the case of a side collision, and the strength can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an automobile floor structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA in FIG.

[Explanation of symbols]

1 Floor structure for automobiles A few floor panels 4 floor tunnel 5,6 Third cross member which is "cross member" 9 tunnel reinforcement 11,12 Propeller shaft 13 Center bearing 14 Center bearing mount bracket

Claims (3)

[Claims] 1. A propeller shaft formed by bridging a cross member among a floor tunnel, a floor panel and a side sill, and a propeller shaft arranged in a space defined by the floor tunnel via a center bearing mount bracket and a tunnel reinforcement. A floor structure for an automobile supported on a floor panel, wherein a center bearing is held by the center bearing mount bracket, and a front and rear position of the center bearing mount bracket and a front and rear position of the cross member are substantially matched. An automobile floor structure characterized by being made possible. 2. The floor structure for an automobile according to claim 1, wherein the center bearing is formed with a projecting cross section in a floor tunnel, and the center bearing mount bracket and the tunnel reinforcement are mounted at positions. Is adapted to fit within the range of the cross member in the height direction. 3. The automobile floor structure according to claim 1 or 2, wherein the center bearing is covered by a center bearing mount bracket, and the center bearing mount bracket is formed by a tunnel reinforcement fixed to a floor tunnel. An automobile floor structure having a convex cross section formed by covering.