JP2002362423A - Floor structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor structure capable of arranging a brake master cylinder and a brake pedal below a floor with put reducing floor rigidity in a mono-cock vehicle. SOLUTION: Since the brake master cylinder 14 and the brake pedal 15 are mounted to a second cross member 5 through a brake bracket 11 and a forked part 8A of a center member 8 is bonded to the second cross member 2 while it strides the brake master cylinder 14 in a car width direction, mounting rigidity of a brake system unit can be ensured. Since a close cross section part 22 constituted by an arrangement of a brake under cover 21, a close cross section part 4 constituted by a dash cross member 3 through which the brake pedal 15 is penetrated, and close cross section parts 6, 9 constituted by the second cross member 5 and the forked part 8A respectively are collected, the floor rigidity is outstandingly enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile floor structure.

[0002]

2. Description of the Related Art In a large vehicle such as a bus, a brake master cylinder is disposed below the floor, and a brake pedal is passed through a toe board portion of a dash panel at a position offset from the brake master cylinder in a vehicle width direction. It is arranged to protrude into the cabin.

[0003]

In a vehicle such as a large vehicle such as a bus described above, in which the frame carries the strength and rigidity of the vehicle body floor, a through hole is formed in a dash panel or a floor panel due to the arrangement of the brake master cylinder and the brake pedal. Although there is no particular need for stiffening even if a notch has occurred, a monocoque vehicle that obtains strength stiffness by forming the main skeleton of the vehicle body with panel material has the above-mentioned floor rigidity and under-floor aerodynamic characteristics. The arrangement structure of the brake master cylinder and brake pedal cannot be adopted at once.

Accordingly, the present invention provides an automobile in which a brake master cylinder and a brake pedal can be arranged under the floor without significantly increasing the number of reinforcing members and lowering the aerodynamic characteristics under the floor even in a vehicle having a monocoque structure. Is provided.

[0005]

According to the first aspect of the present invention, a first cross member joined to the lower surface of the toeboard portion of the dash panel to form a closed cross section in the vehicle width direction; A second cross member extending rearward from the lower end of the floor panel and joined to the lower surface of the floor portion joined to the front end of the floor panel to form a closed cross section in the vehicle width direction; Is formed in a substantially Y-shaped plane,
A center member joined to the lower surface of the floor panel to form a closed cross-section in the front-rear direction and having a front end of the forked portion joined to the second cross member by abutment. A bracket is attached, and a brake master cylinder is attached to the brake bracket inside the forked portion of the center member.
A brake rod having a brake pedal fixed to one end and a master lever fixed to the master rod end of the brake master cylinder fixed to the other end is rotatably supported by the brake bracket, and the brake pedal is connected to the brake master cylinder. The first cross member and the toe board portion are penetrated through the first cross member and the toe board portion at a position offset in the vehicle width direction, and are disposed in the vehicle interior.
A brake under cover is joined and arranged from the lower surface of the crotch portion to the front surface of the first cross member to form a closed cross-section that includes a portion where the brake master cylinder, the brake rod, and the like are provided.

According to a second aspect of the present invention, a tunnel portion is recessed in the front-rear direction in the second cross member according to the first aspect, and a master cylinder fastening portion of a brake bracket is disposed in the tunnel portion. The dash panel is provided with a cutout for projecting the brake master cylinder into the vehicle compartment on the floor, and the cutout is detachably closed by a lid member.

[0007]

According to the first aspect of the present invention, the brake master cylinder and the brake pedal that is offset from the brake master cylinder in the vehicle width direction are attached to the second cross member via the brake bracket, and Since the fork portion of the center member is joined to the second cross member so as to straddle the brake master cylinder in the vehicle width direction, the mounting rigidity of the brake master cylinder and the brake pedal can be sufficiently ensured.

[0008] A brake under cover is joined and arranged from the lower surface of the forked portion of the center member to the front surface of the first cross member.
Since the closed cross-section portion including the arrangement portion such as the brake rod is configured, even if the first cross member and the toe board portion are provided with an opening for disposing the brake pedal, the first cross member and the second cross member can be used. The closed cross-sections formed by the two cross members, the forked part of the center member, and the brake undercover are assembled to significantly increase the floor rigidity.

Therefore, even in a vehicle having a monocoque structure, it is possible to arrange the brake master cylinder and the brake pedal under the floor without reducing the floor rigidity and the mounting rigidity of the brake system unit.

In addition, since the first cross member and the second cross member can be constituted by a dash cross member and a second cross member which are generally employed in a floor structure of a vehicle having a monocoque structure, an increase in the number of parts is minimized. It can be suppressed and can be obtained advantageously in terms of weight and cost.

Further, as described above, the arrangement portions of the brake master cylinder, the brake rod, and the like are included in the brake undercover and do not exist as protrusions on the lower surface side of the floor. Since the flat state can be maintained, the lowering of the aerodynamic characteristics under the floor can be suppressed, and the brake master cylinder, which is an important security component, is surrounded by the forked portion of the brake under cover, the second cross member, and the center member. Can be reliably protected.

According to the invention described in claim 2, according to claim 1,
In addition to the effect of the invention, the notch provided in the tunnel portion of the second cross member and the floor portion of the dash panel allows the brake master cylinder to be disposed as far as possible upward, so that the ground height can be kept high. The undersurface of the floor can be more efficiently flattened by the undercover.

Further, since both the tunnel portion and the cutout portion are present in the area stiffened by the forked portion of the center member, it is possible to avoid a decrease in floor rigidity.

Further, since the box-shaped lid member for closing the notch is detachable, the lid member can be detached and maintenance and inspection of the brake master cylinder can be easily performed from the passenger compartment side.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a dash panel for separating a compartment R and a compartment R of a front compartment, and includes a vertical wall portion 1A and a forwardly inclined toe board portion 1B following the lower end thereof. And a substantially horizontal floor portion 1C following the lower end thereof. The rear end of the floor portion 1C is connected to the front end of the floor panel 2 by welding or the like.

On the front side of the floor panel 2, a bulging portion 2A for mounting a seat (not shown) is formed.

A dash cross member 3 as a first cross member formed substantially in an L-shape is joined and arranged below the toe board portion 1B of the dash panel 1, and a closed cross section 4 extending in the vehicle width direction. Is composed.

On the lower surface of the floor portion 1C, a second cross member 5 as a second cross member having a hat-shaped cross section is joined and arranged to form a closed cross section 6 extending in the vehicle width direction. I have.

At the center of the second cross member 5 in the vehicle width direction, a tunnel portion 7 is recessed in the front-rear direction.

The left and right ends of the dash cross member 3 and the second cross member 5 are joined to left and right sides of the lower surface of the floor panel 2 and are joined to side members (not shown) extending in the front-rear direction.

At the center of the lower surface of the floor panel 2 in the vehicle width direction, a center member 8 having a hat-shaped cross section, which is provided with a bifurcated portion 8A on the front side and formed in a substantially Y-shaped plane, is joined and arranged. The closed section 9 extends in the front-rear direction.

Each front end of the bifurcated portion 8A of the center member 8 straddles the tunnel portion 7 of the second cross member 5 in the vehicle width direction and is joined to the rear wall of the second cross member 5 in abutting manner.

Reference numeral 11 denotes a brake bracket on which the brake master cylinder 14 and the brake pedal 15 are mounted. The base plate 11A is fixed to the front wall of the second cross member 5 by joining or fastening.

On one side of the rear surface of the base plate 11A, a box-shaped master cylinder fastening portion 11B is formed to be slightly inclined upward, and the base plate 1
Bearing portions 11C protrude from both left and right sides of the front surface of 1A, and the master cylinder fastening portion 11B is disposed in the tunnel portion 7 of the second cross member 5.

At the center in the vehicle width direction of the floor portion 1C of the dash panel 1, from the vicinity of the joint arrangement portion of the second cross member 5 to the lower portion of the front wall of the bulging portion 2A of the floor panel 2, the brake master cylinder 14 A notch 12 for escape is formed to avoid interference.

The brake master cylinder 14 is connected to the master rod 14A at the front end of the brake
Through the rear wall of the master cylinder fastening portion 11B of
It is fastened and fixed to the rear wall so as to be inclined upward and rearward, and the rear side portion is disposed so as to protrude from the notch portion 12 into the vehicle interior R. The notch portion 12 is provided with a box-shaped lid member 13. From the floor portion 1C of the dash panel 1 to the front wall of the bulging portion 2A of the floor panel 2, it is detachably attached and closed with, for example, bolts and nuts.

The brake pedal 15 is a pedal arm 15A.
And a pedal pad 15B provided on the upper end thereof, and the lower end of the pedal arm 15A is fixed to one end of the brake rod 16.

A brake rod 16 is rotatably supported by a pair of left and right bearings 11C of the brake bracket 11, and a master lever 17 is fixed to the other end of the brake rod 16 in a downward direction opposite to the pedal arm 15A. The master lever 17 is connected to the end of the master rod 14A of the brake master cylinder 14.

The brake pedal 15 is offset from the brake master cylinder 14 in the vehicle width direction and projects into the vehicle compartment R through the dash cross member 3 and the openings 18 and 19 provided in the toe board portion 1B of the dash panel 1. It is arranged.

The fork portion 8 of the center member 8
A substantially tray-shaped brake under cover 21 is joined and arranged from the lower surface of A to the lower front surface of the dash cross member 3 to form a closed cross-sectional portion 22 including the arrangement portions of the brake master cylinder 14, the brake rod 16, and the like. Make up.

The brake under cover 21 includes a brake master cylinder 14 and a downward master lever 1.
7 is formed deeper than the second receiving portion 21B that receives the portion where the brake pedal 15 is provided, and the first receiving portion 21A and the second receiving portion 21B that receive the portion where the brake pedal 15 is provided. A bead portion 21C is bulged upward in the front-rear direction at a boundary portion between the brake under cover 2 and the bead portion 21C.
1, the surface rigidity is increased.

According to the structure of the above embodiment, the brake master cylinder 14 and the brake pedal 15 which is arranged offset from the brake master cylinder 14 in the vehicle width direction are connected via the brake bracket 11 to the second cross member 5 serving as the second cross member. Further, since the fork portion 8A of the center member 8 is connected to the second cross member 5 across the brake master cylinder 14 in the vehicle width direction, the brake master cylinder 14 and the brake pedal 15 Sufficient mounting rigidity can be ensured.

The forked portion 8A of the center member 8
A tray-shaped brake under cover 21 is joined and arranged from the lower surface of the dash cross member 3 as the first cross member to the lower front surface of the dash cross member 3, and a closed cross section including the arrangement parts of the brake master cylinder 14, the brake rod 16, and the like. Because the portion 22 is configured, even if the dash cross member 3 and the toeboard portion 1B of the dash panel 1 are provided with openings 18 and 19 for disposing the brake pedal 15, these dash cross members 3 and second cross The closed cross-sections 4, 6, 9, and 22, which are constituted by the member 5, the forked portion 8A of the center member 8, and the brake undercover 21, are assembled to significantly increase the floor rigidity.

Therefore, even in a vehicle having a monocoque structure, the brake master cylinder 14 can be mounted without lowering the floor rigidity and the mounting rigidity of the brake system unit.
Further, it is possible to arrange the brake pedal 15 under the floor.

Moreover, as described above, the first cross member,
Since the second cross member can be constituted by the dash cross member 3 and the second cross member 5 employed in the floor structure of a general monocoque vehicle, the increase in the number of parts can be suppressed as small as possible, and the weight can be reduced. It can be obtained in terms of cost and cost.

Further, as described above, the parts such as the brake master cylinder 14 and the brake rod 16 are included in the tray-shaped brake under cover 21 and do not exist as protrusions on the lower surface of the floor. Since the lower surface of the floor can be maintained in a substantially flat shape by the cover 21, the lowering of the aerodynamic characteristics under the floor can be suppressed, and of course, the important safety component is provided by the fork portion 8A of the brake under cover 21, the second cross member 5, and the center member 8. Brake master cylinder 14
Can be reliably protected.

In this embodiment, as described above, the brake master cylinder 14 is released as much as possible by the notch 12 provided in the tunnel portion 7 of the second cross member 5 and the floor portion 1C of the dash panel 1. Since the arrangement height can be kept high, the flattening of the lower surface of the floor by the brake undercover 21 can be performed more efficiently.

In addition, the tunnel 7 and the notch 1
Since each of 2 exists in the area stiffened by the forked portion 8A of the center member 8, it is possible to avoid a decrease in floor rigidity.

Further, since the box-shaped lid member 13 for closing the notch 12 is detachable, the lid member 13 is detached, so that the maintenance and inspection of the brake master cylinder 14 can be easily performed from the passenger compartment R side. it can.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dash panel 1B Toe board part 1C Floor part 2 Floor panel 3 Dash cross member (1st cross member) 4 Closed cross-section part comprised of 1st cross member 5 Second cross member (2nd cross member) 6 Configured by 2nd cross member Closed cross section 7 Tunnel 8 Center member 8A Bifurcation 9 Closed cross section composed of center member 11 Brake bracket 11B Master cylinder fastening part 12 Notch 13 Lid member 14 Brake master cylinder 14A Master rod 15 Brake pedal 16 Brake rod 17 Master lever 21 Brake under cover 22 Closed section composed of brake under cover

Claims (2)

[Claims] 1. A first cross member joined to a lower surface of a toe board portion of a dash panel to form a closed cross section in a vehicle width direction, and a front end of a floor panel extending rearward from a lower end of the toe board portion. It is joined and arranged on the lower surface of the floor unit joined to
A second cross member forming a closed cross-section in the vehicle width direction; a bifurcated portion on the front side; a substantially Y-shaped plane; and a joint disposed on the lower surface of the floor panel to form a closed cross-section in the front-rear direction. And a center member having a front end of the fork portion joined to the second cross member by abutting the front end of the fork portion. A brake bracket is attached to the second cross member, and the center member is provided inside the fork portion of the center member. The brake master cylinder is attached to the brake bracket, while the brake pedal is fixed to one end and the master lever fixed to the master rod end of the brake master cylinder at the other end is rotatably supported by the brake bracket. At the same time as the brake pedal is offset from the brake master cylinder in the vehicle width direction. The brake master cylinder is disposed so as to protrude into the vehicle interior through the member and the toe board portion, and to have a brake under cover joined from the lower surface of the forked portion of the center member to the front surface of the first cross member. A floor structure of an automobile, comprising a closed cross-section including a portion where brake rods and the like are provided. 2. A tunnel portion is recessed in the front-rear direction in the second cross member, and a master cylinder fastening portion of a brake bracket is disposed in the tunnel portion. The floor structure of an automobile according to claim 1, wherein a notch portion is provided so as to protrude from the vehicle, and the notch portion is detachably closed by a lid member.