JP3726538B2 - Deck cross member mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a deck cross member constituting a vehicle body skeleton member at the front part of a passenger compartment, and more particularly to a deck cross member mounting structure in which left and right ends of a deck cross member are fastened and fixed to left and right front pillars.
[0002]
[Prior art]
An instrument panel supported by a vehicle body skeleton member is provided in the front part of the vehicle compartment, and a steering handle for switching the traveling direction of the vehicle to a desired direction is provided near the driver's seat. The steering column that supports 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 that is disposed below the instrument panel and also supports 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 passenger compartment. In addition, a cowl top extends in the vehicle width direction in front of the deck cross member, and the rigidity of the front part of the passenger compartment is ensured by a deck constituent member 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 the 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 is subjected to engine vibration, the steering handle side tends to vibrate, and the steering handle at the tip of the steering column supported by the pipe-shaped deck cross member may resonate particularly during idle operation. is there.
[0004]
Therefore, in order to increase the rigidity of the deck cross member itself that supports the steering column, for example, the vicinity of the steering column mounting portion is coupled to the cowl top side by using a column bracket or the like, whereby the deck cross member is connected to another body frame member. Vibration is prevented by supporting at three points with respect to the side. Furthermore, in order to increase the joint rigidity of the part where the deck cross member and the other vehicle body skeleton member are joined, 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 provided on the left and right front pillars. Tightening and fixing are performed. An example is disclosed in JP-A-7-17438.
[0005]
[Problems to be solved by the invention]
Thus, in order to prevent the steering handle and deck cross member side that has been subjected to engine vibration from resonating, the rigidity of the deck cross member itself is increased and the rigidity of the connection between the left and right ends of the deck cross member and the left and right front pillars is increased. It has been done to raise. However, the deck cross member mounting structure disclosed in Japanese Patent Laid-Open No. 7-17438 and other conventional deck cross member mounting structures are not sufficient 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. Therefore, a deck cross member mounting structure that can further enhance the coupling rigidity is desired. In addition, the occupant may feel uncomfortable due to the resonance on the steering handle side subjected to engine vibration, particularly the resonance of the steering handle during idling.
[0006]
An object of the present invention is to provide a deck cross member mounting structure that can reinforce the coupling rigidity between the left and right ends of the deck cross member and the left and right front pillars, and can eliminate discomfort caused by vibration of the steering handle.
[0007]
[Means for Solving the Problems]
In order to achieve the above-described object, in the invention of claim 1, left and right front pillars, which are respectively provided at the front part of the passenger compartment and joined to each other by a front pillarer and a front pillar outer , respectively, Between the left and right front pillars, a pair of left and right cross member brackets having a pair of vertical plates that are separated from each other in the longitudinal direction of the vehicle body and project toward the center of the vehicle body, a pair of pipes that connect the pair of vertical plates to each other A connecting bracket that is welded to the left and right ends of the deck cross member disposed on the left and right, a pair of short pipes that are sandwiched between the front and rear vertical plates forming the connecting bracket and are disposed at the same interval as the pair of pipes, and a pair of left and right Each pair of vertical plates of the cross member bracket is inserted into through holes formed in the left and right front pillars and extends to the front pillar outer. The abutting portions of the front pipeliner and the outer are welded to each other, and bolts are continuously passed through the pair of pipes of the cross member bracket and the pair of short pipes of the connecting bracket, and the nuts are screwed together. By performing the fastening process, the left and right ends of the deck cross loss member are fastened and fixed to the left and right cross member brackets by the bolts.
According to the second aspect of the present invention, the left and right front pillars, which are arranged in the front part of the passenger compartment and are joined to each other by the front pillarer and the front pillar outer, are respectively fixed to the left and right front pillars, A pair of left and right cross member brackets having a pair of vertical plates projecting toward the center of the separated vehicle body, a pair of pipes formed with internal threads for connecting the pair of vertical plates to each other, and the left and right front pillars A connecting bracket that is welded to the left and right ends of the deck cross member, a pair of short pipes that are sandwiched between the front and rear vertical plates that form the connecting bracket, and are arranged at the same interval as the pair of pipes, and a pair of left and right cross members Each pair of vertical plates of the bracket is inserted into through holes formed in the left and right front pillars and extends to the front pillar outer. The abutting portions of the front pipeliner and the outer are welded to each other, and bolts inserted through the pair of short pipes of the connecting bracket are screwed into the pair of pipe nuts of the cross member bracket, thereby the deck cross loss. The left and right ends of the member are fastened and fixed to the left and right cross member brackets by the bolts.
In claim 1, the pair of vertical plates of each cross member bracket are coupled to each other by a pipe, and the left and right ends of the deck cross member are attached to the left and right cross member brackets by bolts that pass through the pipe and are screwed to the nut. Tighten and fix. According to a second aspect of the present invention, a pair of vertical plates of each cross member bracket is coupled to each other by a pipe, and is screwed to an inner screw of the pipe to fasten and fix the left and right ends of the deck cross member to the left and right cross member brackets.
For this reason, in Claims 1 and 2, the load from the deck cross member is distributed and transmitted to the pair of front and rear vertical plates by the pipe and transmitted from the pair of vertical plates to the front side wall surface of the front pillar. Therefore, the shared load of both vertical plates can be made relatively small, and the displacement can be suppressed by sufficiently maintaining rigidity even when a load is input from the deck cross member. 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. Discomfort can be eliminated.
[0008]
In particular , the cross member bracket is fixed to both the vehicle interior side vertical wall and the vehicle exterior vertical wall of the left and right front pillars . For this reason, it is possible to enhance the binding rigidity of the cross member bracket and the front Pila, Ru can be fully enhance the binding rigidity of the deck cross member and the front Pila.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
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 deck cross member 1 which is a part of a vehicle body skeleton member disposed in a front part R of a vehicle compartment (not shown) is fastened and fixed to left and right front pillars 2 and 3 which are other vehicle body skeleton members. Applied to the binding site.
The vehicle body skeleton member provided in the vehicle compartment front R is welded to the upper end of the dashboard 5 rising above the front end of the front floor 4 and forms a part of the deck provided in the vehicle width direction Y. 6 and a deck cross member 1 arranged side by side at the 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.
[0010]
The cowl top inner 6 constitutes a cowl top having a closed cross-sectional structure that is overlapped with an outer member (not shown) and extends in the vehicle width direction Y, and its left and right ends are connected to the front upper portions of the left and right front pillars 201 and 301. Yes. The left and right front pillars 201 and 301 are joined to the front pillar outer 202 and 302 to form the left and right front pillars 2 and 3. The lower rear portions of the front pillars 2 and 3 are respectively 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 left and right front pillars 201 and 301 between the respective compartment side vertical wall surfaces f1, and a bulging bracket 8 is provided on the compartment side wall surface f1. Welded in a protruding state toward the center of the vehicle.
The deck cross member 1 is assembled with an instrument panel (not shown) over the entire upper portion thereof, and after being assembled into a sub-assembly, the deck cross member 1 is fastened and fixed to the left and right cross member brackets 8 in the front part R of the vehicle compartment.
[0011]
The deck cross member 1 has a pipe-like main portion 101, a column bracket 11 that supports the steering column 9 is welded to the right side of the main portion 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 its middle part is welded so as to enclose the deck cross member 1, and the front end side (upper side in FIG. 1) is fastened to the cowl top inner 6 with a plurality of bolts (not shown). It is fixed. 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 connecting brackets 12 of the main portion 101 are formed on the left and right sides, and here, the left side will be mainly described.
[0012]
As shown in FIGS. 3 to 5A and 5B, the connecting bracket 12 includes front and rear vertical plates 121 and 122 that hold the left end portion of the main portion 101 from the front and rear direction X, and front and rear vertical plates 121 and 122. A pair of upper and lower short pipes 13 held between enlarged end portions 121a and 122a formed to be enlarged in the vertical direction on the front end side, and positioning pins 14 supported by the enlarged end portions 121a on the front side and positioned between the two short pipes 13 are provided. . The front enlarged end portion 121a is formed with an extended portion 121b that bends and extends rearward and overlaps with the bent portion 122b of the rear enlarged end portion 122a and is welded to each other.
The left and right cross member brackets 8 on the left and right front pillars 2 and 3 on which the left and right connecting brackets 12 are overlapped are formed on the left and right sides, and the left side will be mainly described here.
[0013]
As shown in FIGS. 3 and 5B, the cross member bracket 8 includes a pair of longitudinal longitudinal plates 801 and 802 that are separated from each other in the longitudinal direction X of the vehicle body, and their base ends are welded to the front pipeliner 201. Yes. The front and rear vertical plates 801 and 802 protrude to the vehicle body center side (right side in FIG. 3), the front vertical plate 801 protrudes and bends backward from the end to form an extension portion 803, and the extension portion 803 is bent. The flanged portion is overlapped with the tip of the rear vertical plate 802 and 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, and a pair of upper and lower pipes 15 (see FIG. 5B) that join the two vertical plates to each other are integrally connected by welding. Yes.
[0014]
Here, the distance between the pair of upper and lower pipes 15 and the distance between the pair of upper and lower short pipes 13 of the connecting bracket 12 are formed so as to coincide with each other so that a fastening bolt 16 described later can be inserted into both pipes. Composed. Further, a positioning hole 17 into which the positioning pin 14 of the connection bracket 12 can be fitted is formed in the middle portion of the rear vertical plate 802 in the vertical direction. This eliminates the relative gap in the vehicle width direction Y between the left and right front pillars 2 and 3 and the deck cross member 1, and the vehicle width direction of the pair of upper and lower pipes 15 and the pair of upper and lower short pipes 13 of the connecting bracket 12. The displacement of Y can be eliminated, and the tightening operation of the fastening bolt 16 can be facilitated.
[0015]
When the deck cross member mounting structure of the present invention is adopted as a part of the vehicle body front structure, the left and right connecting brackets 12 and column brackets 11 are welded to the main portion 101 of the deck cross member 1 in advance. In addition, an instrument panel (not shown) is temporarily attached to the deck cross member 1 side, carried into the front part of the passenger compartment, and attached to the vehicle body frame member side.
At this time, the positioning pins 14 of the left and right connecting brackets 12 are fitted into the 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 The pair of upper and lower pipes 15 of the cross member bracket 8 and the pair of upper and lower short pipes 13 of the connecting bracket 12 are positioned, and the fastening bolts 16 are continuously inserted into both pipes. A nut 18 is screwed into a portion protruding from 801 and tightened to fix the left and right ends of the deck cross member 1 to the cross member brackets 8 on the left and right front pillars 2 and 3 side.
[0016]
After the fixing process of the deck cross member 1 and the front pillars 2 and 3, the front end portion of the column bracket 11 is fastened and fixed to the position opposite to the cowl top inner 6 so that the deck cross member 1 is fixed at three points. It is possible to fix the deck cross member 1 to the other vehicle body skeleton member side, secure the coupling rigidity between the deck cross member 1 and the other vehicle body skeleton member side, and strengthen the rigidity of the deck cross member 1 itself. Next, the steering column 9 is attached to the column bracket 11 side, and the instrument panel (not shown) is attached to the other body frame member side.
[0017]
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 fastened by fastening bolts 16 and nuts 18 at two upper and lower points, respectively. Fixed. In this case, the load from the deck cross member 1 can be distributed and transmitted to the pair of front and rear vertical plates 801 and 802 by the pair of upper and lower pipes 15, and transmitted from the pair of vertical plates to the front pillars 2 and 3. The shared load of the front and rear vertical plates 801 and 802 can be made relatively small, and even when a large load is input from the deck cross member 1, the rigidity can be sufficiently maintained to prevent displacement, thereby ensuring durability. Moreover, even when the steering column 9 side supported by the deck cross member 1 receives a relatively large vibration displacement during the idling operation of the engine, the deck cross member 1 is fixed to the other body frame member side at three points. In particular, 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, it is possible to reliably eliminate discomfort due to the occurrence of vibration on the steering column 9 or the steering handle side (not shown). .
[0018]
In the above-mentioned place, the cross member bracket 8 for fixing the left and right ends of the deck cross member 1 to the front pillars 2 and 3 is welded to the front pillars 201 and 301, but instead of this, FIG. You may comprise as shown in. In this case, the cross member bracket 8a extends the front and rear vertical plates 801a and 802a to the front pillar outer 201 and 301, and the contact portions are welded to each other. The front pillar 201 is provided with a through hole through which the cross member bracket 8a is inserted. A peripheral edge e of the through hole is bent on the flange, and the peripheral edge e is pressed against the front and rear vertical plates 801a and 802a. , Each other is welded. Other parts are configured in the same manner as in the case of the deck cross member mounting structure of FIG.
Even when the deck cross member mounting structure is configured as described above, the same effect as that 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 deck cross member is obtained. 1 and the front pillars 2 and 3 are more rigidly coupled.
[0019]
In the deck cross member mounting structure shown in FIG. 1, a fastening bolt 16 is continuously passed through the pipe 15 of the cross member bracket 8 and the short pipe 13 of the connecting bracket 12, and a nut 18 is screwed into the connecting bracket 12, thereby performing a tightening process. However, in some cases, 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. 6 (b), the fastening bolt 16 is inserted into the short pipe 13 of the connecting bracket 12, and the fastening bolt 16 is screwed into the internal thread n of the pipe nut 15b of the cross member bracket 8b. Thus, the deck cross member 1 can be fastened and fixed to the front pillars 2 and 3. In this case, the number of parts can be reduced and the structure can be simplified.
[0020]
【The invention's effect】
As described above, according to the first and second aspects of the present invention, the load from the deck cross member is distributed to the pair of front and rear vertical plates by the pipe and transmitted to the front and rear longitudinal plates. It can be transmitted to the room-side vertical wall surface, the shared load of both vertical plates can be made relatively small, and the rigidity can be sufficiently maintained even when a load is input from the deck cross member to suppress displacement. In particular, the cross member bracket is fixed to both the vertical wall on the passenger compartment side and the vertical wall on the outer side of the left and right front pillars. For this reason, 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.
In particular, according to the second aspect of the present invention, since the left and right ends of the deck cross member are fastened and fixed to the left and right cross member brackets by the bolts screwed to the inner threads of the pipe, the number of parts can be reduced and the structure can be reduced. It can be simplified.
[Brief description of the drawings]
FIG. 1 is a cutaway plan view of a main part of a front part of a vehicle body adopting a deck cross member mounting structure to which the present invention is applied.
2 is a cutaway perspective view of a main part of a front part of a vehicle body adopting the deck cross member mounting structure of FIG. 1. FIG.
3 is an enlarged cross-sectional view of a joint portion between a cross member bracket and a connection bracket used in the deck cross member mounting structure of FIG. 1;
4 is a side view of a main part of a joint portion between a cross member bracket and a connection bracket used in the deck cross member mounting structure of FIG. 1; FIG.
5A and 5B show a joint portion between a cross member bracket and a connection bracket used in the deck cross member mounting structure of FIG. 1, wherein FIG. 5A is a perspective view of the joint portion, and FIG. 5B is a partial side sectional view of the joint portion. is there.
FIG. 6 shows another embodiment of a vehicle body front portion adopting a deck cross member mounting structure to which the present invention is applied, and FIG. 6 (a) is a joint portion between a cross member bracket and a connecting bracket in the first other embodiment. (B) is a fragmentary sectional side view of the joint part in 2nd other embodiment.
[Explanation of symbols]
1 Deck cross member 2, 3 Front pillar 8 Cross member bracket 801, 802 Vertical plate 15 Pipe 16 Tightening bolt 18 Nut n Inner screw R Vehicle compartment front X Front-rear direction Y Vehicle width direction

Claims (2)

The left and right front pillars, which are deployed in the front part of the passenger compartment and joined to each other by the front pillarer and the front pillar outer,
A pair of left and right cross member brackets each fixed to the left and right front pillars and having a pair of vertical plates that are separated from each other in the longitudinal direction of the vehicle body and project toward the vehicle body center side;
A pair of pipes connecting the pair of vertical plates to each other;
A connecting bracket welded to each of the left and right ends of the deck cross member disposed between the left and right front pillars ;
A pair of short pipes sandwiched between front and rear longitudinal plates forming the connection bracket and disposed at the same interval as the pair of pipes;
Each pair of vertical plates of the pair of left and right cross member brackets is inserted into through holes formed in the left and right front pillars and extends to the front pillar outer so as to contact the front pillars and the outer. Are welded together,
Bolts are continuously passed through the pair of pipes of the cross member bracket and the pair of short pipes of the connecting bracket, and nuts are screwed together to perform fastening processing, whereby the left and right ends of the deck cross loss member are connected to the bolts. Deck cross member mounting structure characterized in that it is fastened and fixed to the left and right cross member brackets by The left and right front pillars, which are deployed in the front part of the passenger compartment and joined to each other by the front pillarer and the front pillar outer,
  A pair of left and right cross member brackets each having a pair of vertical plates fixed to the left and right front pillars and projecting toward the vehicle body center side away from each other in the vehicle longitudinal direction;
  A pair of pipe nuts formed with internal threads for connecting the pair of vertical plates to each other;
  A connecting bracket welded to each of the left and right ends of the deck cross member disposed between the left and right front pillars;
  A pair of short pipes sandwiched between front and rear longitudinal plates forming the connection bracket and disposed at the same interval as the pair of pipes;
  Each pair of vertical plates of the pair of left and right cross member brackets is inserted into through holes formed in the left and right front pillars and extends to the front pillar outer to contact the front pillars and the outer. Are welded together,
  The bolts inserted through the pair of short pipes of the connecting bracket are screwed into the pair of pipe nuts of the cross member bracket, whereby the left and right ends of the deck cross loss member are fastened to the left and right cross member brackets by the bolts. Deck cross member mounting structure characterized by being fixed.

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