JP2000264251A - Deck cross-member mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the sense of uncomfortableness caused by vibration of a steering wheel by heightening the coupling stiffness of the left and right ends of a deck cross-member with a left and right front pillar. SOLUTION: A deck cross-member mounting structure comprises cross- member brackets 8 secured to a left 2 and a right front pillar 3 of the front part R of a car cabin and having a pair of vertical plates 801 and 802 apart from each other in the direction fore and aft X of the car body and protruding toward and center of car body, a pipe 15 to couple together the vertical plates 801 and 802, and bolt 16 fitted in inner threads formed in the pipe 15 or threadedly attached to nut 18 upon penetrating the pipe, wherein the left and right ends of the deck cross-member 1 installed between the left 2 and right front pillars 3 are fastened and secured to the left and right cross-member brackets 8 by bolt 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a deck cross member which forms a vehicle body frame member at the front of a passenger compartment, and more particularly, to a deck in which left and right ends of the deck cross member are fastened and fixed to left and right front pillars. The present invention relates to a cross member mounting structure.

[0002]

2. Description of the Related Art An instrument panel supported by a body frame member is provided at a front portion of a cabin of a vehicle, and a steering handle for switching a running direction of the vehicle to a desired direction is provided near the driver's seat. Is done. The steering column supporting the steering handle has a front portion supported by a steering mechanism on the engine room side, and a rear portion supported by a deck cross member disposed below the instrument panel and also supporting the instrument panel. The left and right ends of the deck cross member are fastened and fixed to left and right front pillars which are other body frame members in the front part of the vehicle compartment. Moreover, a cowl top extends in the vehicle width direction in front of the deck cross member, and the rigidity of the front portion of the vehicle compartment is secured by the deck constituent members including the cowl top and the deck cross member.

[0003] By the way, the steering column has an intermediate portion in the longitudinal direction attached to a deck cross member, and a steering handle having a relatively large mass is attached to the tip thereof. For this reason, when the steering column receives engine vibration, the steering handle side is likely to vibrate. In particular, during idling, the steering handle at the tip of the steering column supported by the pipe-shaped deck cross member may resonate. is there.

In order to increase the rigidity of the deck cross member for supporting the steering column, for example, the vicinity of the steering column mounting portion is connected to the cowl top using a column bracket or the like, whereby the deck cross member is connected to another. Vibration is prevented by supporting the body frame member at three points. Furthermore, in order to increase the coupling rigidity of the portion where the deck cross member and the other vehicle body frame member are coupled, for example, plate brackets are provided at the left and right ends of the deck cross member, and a plurality of portions of the plate bracket are attached to the left and right front pillars. Tightening and fixing are performed.
One example is disclosed in JP-A-7-17438.

[0005]

As described above, the rigidity of the deck cross member itself is increased and the left and right ends of the deck cross member are increased in order to prevent the steering handle and the deck cross member side which have been conventionally subjected to engine vibration from resonating. The rigidity of connection between the front pillar and the left and right front pillars has been increased. However, in terms of increasing the coupling rigidity between the left and right ends of the deck cross member and the left and right front pillars, the deck cross member mounting structure disclosed in JP-A-7-17438 and other conventional deck cross member mounting structures are not sufficient. There is a need for a deck cross member mounting structure that can further enhance the coupling rigidity. In addition, there is a problem that the occupant may feel uncomfortable due to resonance on the steering handle side receiving the engine vibration, particularly, resonance of the steering handle during idling operation or the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a deck cross member mounting structure which can enhance the rigidity of the connection between the left and right ends of the deck cross member and the left and right front pillars and can eliminate discomfort due to vibration of a steering handle.

[0007]

According to the first aspect of the present invention, a pair of left and right cross member brackets are fixed to left and right front pillars at the front of the vehicle compartment.
Each of the cross member brackets has a pair of vertical plates projecting away from each other in the vehicle front-rear direction and toward the center of the vehicle body. Bolts that connect the same pair of vertical plates to each other with a pipe and screw into internal threads formed in the pipe. Alternatively, a bolt is inserted through the pipe and screwed to a nut, and the right and left ends of the deck cross member arranged between the left and right front pillars are tightened and fixed to the left and right cross member brackets with the bolt. ing. Here, a pair of vertical plates of each cross member bracket are connected to each other by a pipe and screwed to an inner screw of the pipe, or a bolt which is screwed to a nut after penetrating the pipe, and Tighten the left and right ends to the left and right cross member brackets. For this reason, the load from the deck cross member can be dispersed and transmitted to the pair of front and rear vertical plates by pipes, and can be transmitted from the pair of vertical plates to the vehicle interior side vertical wall surface of the front pillar. Can be made relatively small,
Even when a load is input from the deck cross member, the rigidity can be sufficiently maintained and displacement can be suppressed. In particular, even when the steering device side supported by the deck cross member receives vibration displacement, the left and right ends of the deck cross member are fastened and fixed to the cross member bracket with sufficient coupling rigidity. Eliminate discomfort.

Preferably, the cross member bracket may be fixed to both the vehicle interior vertical wall and the vehicle outer vertical wall of the left and right front pillars. In this case, the coupling rigidity between the cross member bracket and the front pillar can be enhanced, and the coupling rigidity between the deck cross member and the front pillar can be sufficiently enhanced. Alternatively, the cross member bracket may be fixed to the vehicle interior side vertical wall of the left and right front pillars. In this case, the structure of the cross member bracket can be simplified.

[0009]

1 and 2 show a deck cross member mounting structure to which the present invention is applied. In this deck cross member mounting structure, a portion of the deck cross member 1 of a vehicle body frame member provided in a vehicle interior front portion R of an automobile (not shown) is fastened and fixed to left and right front pillars 2 and 3 which are other vehicle body frame members. Applied to the binding site. A body frame member disposed in the front part R of the vehicle compartment is welded to an upper end of a dashboard 5 rising above the front end of the front floor 4 and a cowl top inner part of a deck disposed in the vehicle width direction Y. 6 and a deck cross member 1 juxtaposed at a rear position (lower side in FIG. 1) of the cowl top inner, and left and right front pillars 2 and 3 welded to the left and right ends of the front floor 2 and extending vertically. Is provided.

The cowl top inner 6 is overlapped with an outer member (not shown) to form a cowl top having a closed sectional structure extending in the vehicle width direction Y. The left and right ends of the cowl top extend between the front upper portions of the left and right front liners 201 and 301. Are combined. The left and right front pillars 201 and 301 are joined to the front pillar outers 202 and 302 to form left and right front pillars 2 and 3. The rear ends of the front pillars 2 and 3 are welded to the front end of the side sill 7, the upper end is welded to the roof side rail (not shown), and the vertical front end is welded to the left and right ends of the dashboard 5.
In addition, a deck cross member 1 is provided between the vehicle interior side vertical wall surfaces f1 at an intermediate portion between the left and right front liners 201 and 301, and a bulging bracket 8 is provided on the vehicle interior side wall surface f1. It is welded so as to protrude toward the center of the vehicle. The deck cross member 1 has an instrument panel (not shown) assembled over the entire upper portion thereof. These instrument panels are sub-assembled and then fixedly fastened to the left and right cross member brackets 8 at the front part R of the passenger compartment.

The deck cross member 1 is a pipe-shaped main part 1.
A column bracket 11 for supporting the steering column 9 is welded to the right side of the main part 101, and a connection bracket 12 is welded to the left and right ends. The column bracket 11 is formed as a substantially rectangular hollow body, and an intermediate portion thereof is welded to each other so as to surround the deck cross member 1, and a front end side (upper side in FIG. 1) has a cowl top inner 6.
Are secured by a plurality of bolts (not shown). A bending bracket (not shown) is welded to the steering column 9 located below the column bracket 11, and the steering column 9 is fastened and fixed to the lower surface of the column bracket 11 via the bracket. The left and right connection brackets 12 of the main part 101 are formed symmetrically to the left and right, and here, the left side will be mainly described.

As shown in FIGS. 3 to 5A and 5B, the connecting bracket 12 includes front and rear vertical plates 121 and 122 for holding the left end of the main portion 101 in the front and rear direction X. , 122 and a pair of upper and lower short pipes 13 sandwiched between enlarged end portions 121a and 122a which are formed vertically at the distal end side, and a positioning pin 14 supported by the front enlarged end portion 121a and located between the short pipes 13. And The front-side enlarged end portion 121a is extended rearward and extends.
1b is formed, which overlaps the bend 122b of the later enlarged end 122a and is welded together. The left and right cross member brackets 8 on the left and right front pillars 2 and 3 on which the left and right connection brackets 12 are overlapped are formed symmetrically with respect to the left and right, and here, the left side will be mainly described.

As shown in FIGS. 3 and 5 (b), the cross member bracket 8 includes a pair of front and rear vertical plates 801 and 802 separated from each other in the vehicle front and rear direction X. Welded. Front and rear vertical plate 80
Reference numerals 1 and 802 protrude toward the center of the vehicle body (right side in FIG. 3), and the front vertical plate 801 is bent rearward from the protruding end to form an extended portion 803. The bent flange portion of the extended portion 803 is formed. On the front end of the rear vertical plate 802 and are welded to each other. The pair of front and rear vertical plates 801 and 802 are opposed to each other with a gap t in the front and rear direction X therebetween, and a pair of upper and lower pipes 15 (see FIG. 5 (b)) that connect the two vertical plates to each other are integrally connected therebetween by welding. I have.

Here, the interval between the pair of upper and lower pipes 15 and the interval between the upper and lower pair of short pipes 13 of the connecting bracket 12 are formed so that a fastening bolt 16 described later is inserted continuously into both pipes. It is configured to be able to. Further, a positioning hole 17 into which the positioning pin 14 of the connection bracket 12 can be fitted is formed in the vertical middle portion of the rear vertical plate 802. Thereby, the relative gap between the left and right front pillars 2 and 3 and the deck cross member 1 in the vehicle width direction Y is eliminated, and the pair of upper and lower pipes 15 and the pair of upper and lower short pipes 13 of the connection bracket 12 are mounted in the vehicle width direction. The displacement of Y can be eliminated, and the work of fastening the fastening bolt 16 can be facilitated.

When the deck cross member mounting structure of the present invention is adopted as a part of the vehicle body front structure, the main portion 101 of the deck cross member 1 is attached to the main body 101 in advance.
The left and right connection brackets 12 and the column brackets 11 are welded, and an instrument panel (not shown) is temporarily attached to the deck cross member 1 side, carried into the front of the passenger compartment, and attached to the body frame member side. At this time, the positioning pins 14 of the left and right connection brackets 12 are fitted into the respective positioning holes 17 of the left and right cross member brackets 8 to position the left and right cross member brackets 8 and the deck cross member 1 in the vehicle width direction Y, and A pair of upper and lower pipes 15 of the cross member bracket 8 and the connecting bracket 1
2 and the pair of upper and lower short pipes 13 are positioned, the fastening bolts 16 are continuously inserted into both pipes, and the nuts 18 are screwed into the portions protruding from the front vertical plate 801 at the front ends of the respective fastening bolts 16. By tightening, the left and right ends of the deck cross member 1 can be tightened and fixed to the cross member brackets 8 on the left and right front pillars 2 and 3 side.

After the fixing process of the deck cross member 1 and the front pillars 2 and 3, the front end of the column bracket 11 is fastened and fixed to a position facing the cowl top inner 6, whereby the deck cross member 1 is fixed. At three points, the deck cross member 1 is fixed to the other vehicle body frame member side to secure the coupling rigidity between the deck cross member 1 and the other vehicle body frame member side, and the rigidity of the deck cross member 1 itself can be enhanced. Next, the steering column 9 is attached to the column bracket 11 side, and the instrument panel (not shown) is attached to another body frame member side.

When such a deck cross member mounting structure is adopted, the left and right ends of the deck cross member 1 and the column brackets 9 of the left and right front pillars 2 and 3 are respectively provided with two fastening bolts 16 and nuts 18 at upper and lower points. Is tightened and fixed. In this case, the load from the deck cross member 1 is applied to the pair of front and rear vertical plates 80 by the pair of upper and lower pipes 15.
1, 802, and can be transmitted to each of the front pillars 2, 3 from the pair of vertical plates.
01, 802 can be made relatively small, and even when a large load is input from the deck cross member 1, sufficient rigidity can be maintained, displacement can be prevented, and durability can be ensured. Moreover,
Even when the steering column 9 side supported by the deck cross member 1 receives a relatively large vibration displacement during an idling operation of the engine or the like, the deck cross member 1 is fixed to the other body frame members at three points. Since the left and right ends of the deck cross member 1 are fastened and fixed to the cross member brackets 8 with sufficient coupling rigidity, discomfort caused by the vibration of the steering column 9 and the steering handle (not shown) can be reliably eliminated.

In the above process, the deck cross member 1
The cross member bracket 8 for fixing the left and right ends of the front pillars 2 and 3 to the front pillars 201 and 301 is welded to the front pillars 201 and 301. Alternatively, the cross member bracket 8 may be configured as shown in FIG. . In this case, the cross member bracket 8a extends the front and rear vertical plates 801a and 802a to the front pillar outers 201 and 301, and the contact portions are welded to each other. In addition, a through-hole through which the cross member bracket 8a is inserted is formed in the front liner 201,
The peripheral edge e of the through hole is formed to be bent on the flange, and the peripheral edge e is pressed against the front and rear vertical plates 801a and 802a and welded to each other. Other parts are configured in the same manner as in the deck cross member mounting structure of FIG. When the deck cross member mounting structure is configured in this manner, the same operation and effect as those of the deck cross member mounting structure of FIG. 1 can be obtained.
In particular, the coupling rigidity between the cross member bracket 8a and the front pillar 2, that is, the coupling rigidity between the deck cross member 1 and the front pillars 2, 3 is further increased.

In the deck cross member mounting structure shown in FIG. 1, a fastening bolt 16 is passed through the pipe 15 of the cross member bracket 8 and the short pipe 13 of the connecting bracket 12 continuously, and a nut 18 is screwed into the connecting bracket 12 to tighten. Although the attachment process has been performed, a pipe nut 15b may be attached to the cross member bracket 8 instead of the pipe 15 as shown in FIG. In the deck cross member mounting structure shown in FIG. 6B, the fastening bolt 16 is inserted through the short pipe 13 of the connection bracket 12, and then the inner thread n of the pipe nut 15b of the cross member bracket 8b.
, A fastening bolt 16 is screwed into the front pillars 2 and 3. In this case, the number of parts can be reduced, and the structure can be simplified.

[0020]

As described above, according to the first aspect of the present invention, the load from the deck cross member is dispersed and transmitted to the pair of front and rear vertical plates by the pipe, and the front and rear sides of the pair of vertical plates are transmitted to the front and rear. Since the load can be transmitted to the vertical wall surface on the passenger compartment side of the pillar, the load shared between the two vertical plates can be made relatively small, and even when a load is input from the deck cross member, sufficient rigidity can be maintained and displacement can be suppressed. In particular, even when the steering device side supported by the deck cross member is subjected to vibration displacement, the left and right ends of the deck cross member are fastened and fixed to the cross member bracket with sufficient coupling rigidity. Eliminate discomfort.

[Brief description of the drawings]

FIG. 1 is a cutaway plan view of a main part of a front portion of a vehicle body employing a deck cross member mounting structure to which the present invention is applied.

FIG. 2 is a cutaway perspective view of a main portion of a front portion of a vehicle body employing the deck cross member mounting structure of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of a connecting portion between a cross member bracket and a connection bracket used in the deck cross member mounting structure of FIG. 1;

FIG. 4 is a side view of a main part of a connecting portion between a cross member bracket and a connection bracket used in the deck cross member mounting structure of FIG. 1;

5A and 5B show a connecting portion of a cross member bracket and a connecting bracket used in the deck cross member mounting structure of FIG. 1, wherein FIG. 5A is a perspective view of the connecting portion, and FIG. 5B is a partial side sectional view of the connecting portion. is there.

FIG. 6 shows another embodiment of a vehicle body front portion employing a deck cross member mounting structure to which the present invention is applied, and FIG. 6 (a) shows a connecting portion between a cross member bracket and a connection bracket in the first other embodiment. And (b) is a partial side sectional view of the coupling portion in a second other embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deck cross member 2, 3 Front pillar 8 Cross member bracket 801 and 802 Vertical plate 15 Pipe 16 Tightening bolt 18 Nut n Inner screw R Cab front X Front-back direction Y Vehicle width direction

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takayuki Miyake 5-33-8 Shiba, Minato-ku, Tokyo F-term in Mitsubishi Motors Corporation (Reference) 3D003 AA01 AA06 BB01 CA07 CA33 DA09

Claims (1)

[Claims] 1. A pair of left and right cross member brackets, each of which is fixed to left and right front pillars at a front portion of a vehicle compartment, and has a pair of left and right vertical plates which are separated from each other in a vehicle front-rear direction and project toward a vehicle center. A pipe that connects the plates to each other, and a bolt that is screwed to an internal screw formed in the pipe, or that is screwed to a nut after penetrating the pipe, and disposed between the left and right front pillars. A deck cross member mounting structure, wherein left and right ends of the deck cross member are fastened and fixed to the left and right cross member brackets with the bolts.