JPH08183478A - Reinforcement support structure - Google Patents

Abstract

PURPOSE: To provide reinforcement support structure that can reduce manufacturing cost and prevent steering vibration at the time of normal travel. CONSTITUTION: A reinforcement 10 is laid horizontally across lateral front pillars P1, P2 on the back side of an instrument panel, and a large diameter pipe 11 is disposed on the driver's seat side, while a small diameter pipe 12 is disposed on an assistant driver's seat side. The insert part 11a side of the large diameter pipe 11 is provided with through holes 15a, 15b vertically piercing the large diameter pipe 11. These through holes 15a, 15b are formed by burring, and burrs 16a, 16b serving as flanges are provided around the through holes 15a, 15b. A press 20 erected on the floor of an automobile is fitted into the through holes 15a, 15b of the reinforcement 10, and the contact parts with the burrs 16a, 16b are welded over the whole periphery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a reinforcement for supporting a reinforcement mounted horizontally on a vehicle to which an instrument panel or the like is attached by a breather standing on the floor of the vehicle. .

[0002]

2. Description of the Related Art Conventionally, a reinforcement is horizontally provided on the left and right front pillars on the back side of an instrument panel in a vehicle. Such a reinforcement is shown in FIG.
As shown in the front view of FIG. 5A and the right side view of FIG.
A large diameter portion 111 and a small diameter portion 112 are provided, the large diameter portion 111 is arranged on the driver seat side, and the small diameter portion 112 is arranged on the passenger seat side.

The reinforcement 110 is attached to the left and right front pillars of the vehicle as described above, and is further supported by the breath 120 standing on the floor of the vehicle. The reinforcement 110 and the breath 120 are bolts 117 in consideration of the assemblability to the vehicle.
Welded bracket 118 of reinforcement 1
The bolt 117 is inserted into a bolt insertion hole formed in the large diameter portion 111 of the hole 10 and formed on the tip side of the breath 120.
By connecting the bolts 117, they are connected.

[0004]

However, in the support structure for the reinforcement of FIG. 5, although the breath 120 and the bracket 118 are fastened with the bolt 117, it is difficult to say that the rigidity against torsion is sufficient. By the way, generally, when a vehicle reaches a certain speed, steering vibration is generated due to resonance due to various factors during driving (road surface, body, etc.). However, if the rigidity against torsion described above is not sufficient, the steering vibration is generated. Since the driving speed is on the low speed side, the driver may feel discomfort during normal driving.

Further, since the bracket 118 is required, the number of parts is large, which causes the manufacturing cost to increase. The present invention has been made in view of the above problems, and an object of the present invention is to provide a support structure for a reinforcement that can reduce manufacturing costs and can prevent steering vibration during normal traveling. To do.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is a breath machine in which a reinforcement mounted horizontally on a vehicle for mounting an instrument panel or the like is erected on a floor portion of the vehicle. In the support structure for the reinforcement according to, the through hole is provided in the reinforcement, and the distal end side of the breath is inserted into and fixed to the through hole.

The invention according to claim 2 is the support structure for the reinforcement according to claim 1, characterized in that the through hole penetrates the reinforcement in the vertical direction. Further, the invention according to claim 3 is the support structure for the reinforcement according to claim 1 or 2, wherein a flange is provided around the through hole.

Furthermore, the invention according to claim 4 is the support structure for the reinforcement according to any one of claims 1 to 3, wherein the reinforcement includes a large diameter portion and a small diameter portion. The through hole is provided in the large diameter portion.

[0009]

In the support structure for the reinforcement according to claim 1 having the above-mentioned structure, the tip end side of the breath which is erected on the floor of the vehicle is inserted into the through hole provided in the reinforcement. Fix it.

Therefore, in the past, a bracket was attached to the reinforcement and the breath was fixed to this bracket, whereas the bracket is unnecessary in the present invention, the number of parts is reduced, and the manufacturing cost is reduced. The effect is obtained. In addition, since the breath is directly inserted into the reinforcement, the connection point between the breath and the reinforcement has high rigidity against torsion, and steering vibration (generated by resonance when reaching a certain speed, the handle is The resonance frequency at which the trembling phenomenon occurs shifts to a higher frequency side (that is, a higher speed side) than in the conventional case shown in FIG. Therefore, it is possible to obtain an effect that it is possible to prevent steering vibration during normal traveling.

In addition, in the support structure for the reinforcement according to the second aspect, in addition to the function of the support structure for the reinforcement according to the first aspect, the through hole provided in the reinforcement is vertically penetrated. Therefore, the connection between the breath and the reinforcement is more rigid, and the rigidity against torsion is higher. Therefore, the resonance frequency at which steering vibration occurs is higher on the higher frequency side (that is, on the higher speed side).
Move to

Further, in the support structure for the reinforcement according to claim 3, in addition to the function of the support structure for the reinforcement according to claim 1 or 2, the structure around the through hole provided in the reinforcement is provided. Since the flange is provided, the contact area at the connecting portion between the breath and the reinforcement is increased, and the rigidity at the connecting portion between the breath and the reinforcement is further increased. Therefore, the resonance frequency at which the steering vibration occurs shifts to the higher frequency side (higher speed side).

Furthermore, in the support structure for the reinforcement according to claim 4, in addition to the function of the support structure for the reinforcement according to any one of claims 1 to 3, the through hole is a reinforcement. Since the reinforcement is provided in the large-diameter portion of the reinforcement, the rigidity of the reinforcement itself having the through hole is high, and the rigidity of the connecting portion between the breath and the reinforcement is further increased.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a support structure for a reinforcement of the present embodiment, FIG. 2 is an explanatory view of a main part of FIG. 1, and FIG.
FIG. 3 is a sectional view taken along line AA of FIG.

The reinforcement 10 is a large-diameter pipe 1.
The insertion portion 11a is formed by drawing one end of the pipe 1, and the small diameter pipe 12 is fitted and fixed to the insertion portion 11a. This reinforcement 10
Are horizontally mounted on the left and right front pillars P1 and P2 on the back side of an instrument panel (not shown). That is,
End 11b of large diameter pipe 11 of reinforcement 10
Is inserted and fixed in the hole of the bracket 13 fixed to the front pillar P1, and the end 12b of the small diameter pipe 12 is fixed to the front pillar P2 by a fixing tool 14. In this reinforcement 10, a large-diameter pipe 11 is arranged on the driver's seat side and a small-diameter pipe 12 is arranged on the passenger seat side.

On the insertion portion 11a side of the large diameter pipe 11,
Through holes 15a, 1 penetrating the large diameter pipe 11 in the vertical direction
5b is provided. The through holes 15a and 15b are formed by burring, and burrs 16a and 16b as flange portions are provided around the through holes 15a and 15b.

The breath 20 has a fixing portion 21 provided on the base end side.
By fixing to the floor of the car (not shown),
It stands on the floor. The tip side of the breath 20 is inserted into the through holes 15a and 15b, and the portions contacting the burrs 16a and 16b are welded over the entire circumference.

The steering support 30 is a body connecting portion 31 for fixing to a body (not shown) of an automobile.
Pipe abutting portion 3 that integrally contacts the large diameter pipe 11
2. A plurality of bolts 33 for attaching a steering column (not shown) are provided.

The resonance frequency of steering vibration was measured for the reinforcement of the present embodiment having the above-mentioned structure. FIG. 4 is a graph comparing the resonance frequencies of the present example and the conventional example (see FIG. 5). The solid line shows the present example and the dotted line shows the conventional example. Further, F1 represents the resonance point of the present embodiment, and F2 represents the resonance point of the conventional example.

As is apparent from FIG. 4, the resonance point F1 of this embodiment is shifted to the high frequency side as compared with the resonance point F2 of the conventional example (see FIG. 5). Therefore, in the present embodiment, it is possible to design so that steering vibration is generated at a higher speed side than in the conventional example. That is, in this embodiment, since it is possible to design the steering vibration to occur at a high speed that does not reach during normal traveling, the steering vibration does not occur during normal traveling, and the driver The effect of being able to drive comfortably is obtained.

It is needless to say that the present invention is not limited to the above embodiments and can be implemented in various modes without departing from the technical scope of the present invention. For example, in the above embodiment, the reinforcement 10 in which the large diameter pipe 11 and the small diameter pipe 12 are connected to each other is used. However, one pipe is plastically processed to provide a reinforcement having a large diameter portion and a small diameter portion. You may use.

Further, although the through holes 15a and 15b penetrating in the vertical direction are provided in the above embodiment, it is also possible to provide only the pilot hole 15b and insert / fix the tip of the breath 20 therein. However, from the viewpoint of increasing the rigidity against torsion, it is preferable to provide the through holes 15a and 15b penetrating in the vertical direction as in the above embodiment.

Further, although the burrs 16a and 16b are provided as the flange portions in the above embodiment, it is not always necessary to provide the flange portions. However, from the viewpoint of increasing the rigidity against torsion, it is preferable to provide the flange portion. Furthermore, in the above embodiment, the breath 20 is inserted / fixed on the large diameter pipe 11 side, but may be inserted / fixed on the small diameter pipe 12 side. However, from the viewpoint of increasing the rigidity against twisting, it is preferable to insert and fix the large-diameter pipe 11 side as in the above embodiment.

[Brief description of drawings]

FIG. 1 is a perspective view of a support structure for a reinforcement.

FIG. 2 is an explanatory diagram of a main part of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a graph comparing the resonance frequencies of a conventional example and this example.

FIG. 5 is an explanatory view of a conventional support structure for a reinforcement.

[Explanation of symbols]

10 ... Reinforcement, 11 ... Large diameter pipe, 12 ... Small diameter pipe, 1
5a, 15b ... Through hole, 16a, 16b ... Burr, 20 ... Breath, 21 ... Fixed part, 30 ... Steering support,

Claims (4)

[Claims] 1. A support structure of a reinforcement for supporting a reinforcement mounted horizontally on a vehicle to which an instrument panel or the like is attached by a breather standing on the floor of the vehicle, wherein a through hole is formed in the reinforcement. A support structure for a reinforcement, characterized in that it is provided, and the tip side of the breath is inserted into and fixed to the through hole. 2. The support structure for a reinforcement according to claim 1, wherein the through hole penetrates the reinforcement in the vertical direction. 3. The support structure for a reinforcement according to claim 1, wherein a flange is provided around the through hole. 4. The reinforcement according to claim 1, wherein the reinforcement includes a large diameter portion and a small diameter portion, and the through hole is provided in the large diameter portion. Support structure for hosement.