JP2003341325A - Bracket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bracket which secures the high reliability of strength of a joint relative to with a side rail and achieve considerably light weight at the same time. <P>SOLUTION: The upper end of the bracket 21 is attached to the outer surface of each side rail 1 forming a chassis frame of a vehicle. The bracket 21 extends in the lower direction and a lower rod is supported at its lower end. Bosses 16, 17 for fastening bolts are vertically arranged at the upper end attached to the outer surface of each side rail 1 and a region A is formed between a row group of the upper side boss 16 and a row group of the lower side boss 17 so that the region A is inclined gradually extending outside in the vehicle- width direction as it goes downward. A rib 22 with an appropriate number of columns extending in the vertical direction is formed on the inner surface in the vehicle-width direction of the inclined region A. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bracket for supporting a lower rod from a vehicle body side in a vehicle suspension structure.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show an example of a suspension structure for a large vehicle such as a truck or a bus, which is below a pair of left and right side rails 1 extending in the front-rear direction of the vehicle body (left-right direction in FIG. 6). In the vehicle width direction (Fig. 7
Axle 3 extending in the vertical direction) and axially supporting the wheel 2 at both ends thereof is arranged.
Between the front and rear ends of the support beam 4 integrally assembled to the lower surface near the end of the side rail 1 and the lower surface of the side rail 1,
An air spring 5 that absorbs vertical vibrations is interposed.

An air spring 5 arranged on the front side
An upper end of a bracket 6 extending downward is attached to an outer side surface of the side rail 1 further front of the vehicle, and a roll of the vehicle body is provided between a lower end of the bracket 6 and an intermediate portion of the support beam 4. It is tiltably connected by a stabilizer 7 that enhances rigidity.

That is, the stabilizer 7 shown in FIG.
Is generally called a lower rod integrated stabilizer, and is a hollow that extends in the vehicle width direction by holding both ends via a rubber bush by shaft holding portions 11 provided at the lower ends of the left and right brackets 6. Pipe stabilizer bar 8
And a left and right arm 9 having front ends fixedly attached to both ends of the stabilizer bar 8 and having rear ends connected to a bracket 10 provided at an intermediate portion of the support beam 4 via a rubber bush. When the left and right wheels 2 move up and down at the same time, the stabilizer bar 8 rotates symmetrically with respect to the bracket 6 due to elastic deformation of the rubber bush. The stabilizer 7 does not work in particular, but when the left and right wheels 2 make different vertical movements due to cornering or the like, a torsion moment acts on the stabilizer bar 8,
The reaction force serves to return the left and right wheels 2 to their original positions.

The arm 9 of the stabilizer 7 also has a function of positioning the front and rear of the axle 3 as a lower rod (radius rod on the lower side), so that it is not necessary to separately provide the lower rod. Since it is difficult to reliably suppress the rotational moment (braking force and driving force) about the axis and the lateral displacement moment applied to the axle 3 only by the arm 9, it is difficult to reliably suppress the lateral moment. Rail 1
The inner side surface of the V rod 12 is connected by a V rod 12 that functions as an upper rod (radius rod on the upper side).
Left and right branched end portions 12a (front end portions) are connected to brackets 13 extending from the inner surface of the left and right side rails 1 through a rubber bush, and a bent end portion 12b at the center of the V rod 12 is formed. (Rear end) is axle 3
Is connected to a bracket 14 provided on the upper side of the central portion of the via a rubber bush.

If such a V rod 12 is adopted, it is possible to deal with inputs in both the front-rear direction and the left-right direction of the vehicle body. Therefore, when a parallel link type torque rod is adopted. It is not necessary to install a lateral rod separately as a measure for inputting in the left-right direction, and moreover,
Since it is offset above the lower arm 9, it is possible to reliably suppress the rotational moment of the axle 3 about the axis.

The midway portion of the support beam 4 and the side rail 1 immediately above the support beam 4 are connected by a shock absorber 15 extending in the vertical direction, and the shock absorber 15 swings back and forth vibrations in the vertical direction. Is suppressed and vibration is attenuated.

Further, in such a conventional suspension structure, as shown in detail in FIGS. 8 to 11, a boss for bolting is attached to the upper end portion of the bracket 6 which supports the front end portion of the arm 9 also serving as the lower rod. The side rails 1 are formed by arranging the portions 16 and 17 in upper and lower two stages, and defining a vertical plane between the row group of the upper boss portion 16 and the row group of the lower boss portion 17.
Along the outer surface of the side rail 1, and the bolts (not shown) are passed through the boss portions 16 and 17 to fasten the upper end of the bracket 6 to the outer surface of the side rail 1 (1 in the figure).
8 and 19 indicate relief holes).

[0009]

However, in the structure in which the upper end portion of the bracket 6 is simply fastened along the outer surface of the side rail 1 as described above, propulsion input from the arm 9 via the stabilizer bar 8 is performed. Since it is difficult to secure sufficient strength reliability of the fastening portion against stress during braking and braking, a plurality of relatively large ribs 20 extending in the vertical direction are formed on the outer surface of the upper end of the bracket 6 in the vehicle width direction. However, the relatively large rib 20 formed is a factor that increases the weight of the cast bracket 6 and thus the vehicle weight.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bracket which is capable of realizing a significant weight reduction while securing high strength reliability of a fastening portion with respect to a side rail. And

[0011]

SUMMARY OF THE INVENTION The present invention provides a bracket in which upper ends are attached to the outer surfaces of the side rails forming a chassis frame of a vehicle and extend downward and support the lower rod at the lower ends. The boss portions for fastening bolts are arranged in upper and lower two stages on the upper end portion attached to the outer surface of each side rail, and between the row group of boss portions on the upper stage side and the row group of boss portions on the lower stage side. Is formed so as to gradually project outward in the vehicle width direction as it goes downward, and a rib with an appropriate number of threads extending in the vertical direction is formed on the inner surface in the vehicle width direction of the portion formed by the inclination. It is characterized by being formed.

Therefore, in the present invention, the space between the row group of upper boss portions and the row group of lower boss portions is inclined so as to gradually project outward in the vehicle width direction as it goes downward. Therefore, a rigid structure close to a monocoque with a closed cross section surrounded by this inclined portion, the outer surface of the side rail, and the row group of the two upper and lower boss portions is formed, and Since the inner surface in the vehicle width direction of the inclined portion is effectively reinforced by the ribs of an appropriate number of threads extending in the vertical direction, it is possible to reduce the total mass without unnecessarily forming a thick portion. On the other hand, it is possible to efficiently improve the strength, and in particular, it is possible to use the ribs which are relatively small and thin.

Further, in concretely implementing the bracket of the present invention, for example, a shaft holding portion is provided at a lower end portion so as to hold a stabilizer bar extending in the vehicle width direction,
The arm that is held by the shaft holding portion and extends between the end portion of the stabilizer bar that extends outward in the vehicle width direction and the lower portion of the axle may be supported as a member that also serves as a lower rod.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an example of an embodiment for carrying out the present invention, and the portions denoted by the same reference numerals as those in FIGS. 8 to 11 represent the same things.

The bracket 2 of this embodiment shown in FIGS.
In FIG. 1, the most improved feature of the bracket 2 is the bracket 2 as compared with the conventional bracket 6 described with reference to FIGS.
Between the row group of the upper boss portion 16 and the row group of the lower boss portion 17 at the upper end portion of 1 is formed to be inclined so as to gradually project outward in the vehicle width direction as it goes downward, The rib 22 having an appropriate number of threads extending in the vertical direction is formed on the surface (the surface on the left side in FIG. 5) on the inner side in the vehicle width direction of the portion A (see especially FIG. 5) formed by being inclined. In the example shown here, four ribs 22 (see FIG. 4) are formed so as to connect the appropriate upper and lower boss portions 16 and 17 to each other.

Thus, if the upper end of the bracket 21 is formed in this manner, the distance between the row group of the upper boss portion 16 and the row group of the lower boss portion 17 is gradually increased downward. Since it is inclined so as to project outward in the vehicle width direction, it is surrounded by the inclined portion A, the outer side surface of the side rail 1, and the row groups of the upper and lower tiered boss portions 16 and 17. A rigid structure close to a monocoque with a closed cross section is configured, and moreover, the inner surface in the vehicle width direction of the inclined portion A is effectively reinforced by ribs 22 with an appropriate number of threads extending in the vertical direction. Therefore, it is possible to efficiently improve the strength with respect to the entire mass without forming a thick portion unnecessarily, and in particular, the rib 22 can be a relatively small and thin wall. Becomes

Therefore, according to the above embodiment, a rigid structure close to a monocoque with a closed cross section can be constructed by incorporating the outer surface of the side rail 1 as a structural element, and this is relatively compact. Since the thin ribs 22 can effectively reinforce to obtain a high strength comparable to the conventional one, a high strength reliability of the fastening portion of the bracket 21 to the side rail 1 can be ensured, and at the same time, the weight of the bracket 21 can be significantly reduced. Can be realized.

In this embodiment, a shaft holding portion 11 is provided at the lower end so that the stabilizer bar 8 extending in the vehicle width direction can be held, and the shaft holding portion 11 holds the shaft holding portion 11 so as to extend outward in the vehicle width direction. An example is shown in which the arm 9 connecting the end portion of the stabilizer bar 8 and the lower portion of the axle 3 (see FIG. 6) is configured to be supported as a member that also serves as a lower rod. Can also be applied to a suspension structure in which the lower rod is independently arranged by arranging the other parts, and when applied to such a type of suspension structure, naturally, the same effect as the above is obtained. Obtainable.

Further, the bracket of the present invention is not limited to the above-described embodiment, and the upper rod arranged above the lower rod does not necessarily have to be the V rod, and a parallel link using a lateral rod together. Of course, the upper rod of the formula may be used, and other various modifications may be made without departing from the scope of the present invention.

[0021]

According to the above-mentioned bracket of the present invention,
By incorporating the outer surface of the side rail as a structural element, a rigid structure close to a monocoque with a closed cross section can be constructed, and this is effectively reinforced by relatively small and thin ribs, which is inferior to the conventional one. Since it is possible to obtain a very high strength, it is possible to obtain an excellent effect that a high weight reliability of the bracket can be realized while securing a high strength reliability of the fastening portion of the bracket with respect to the side rail.

[Brief description of drawings]

FIG. 1 is a side view showing an example of an embodiment for carrying out the present invention.

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

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a view in the direction of arrows IV-IV in FIG.

FIG. 5 is a cross-sectional view showing details of the inside by breaking the portion V in FIG.

FIG. 6 is a side view showing an example of a suspension structure in a large vehicle.

FIG. 7 is a view in the direction of arrow VII-VII in FIG.

FIG. 8 is a side view showing details of a conventional bracket.

9 is a view in the direction of arrow IX-IX in FIG.

10 is a cross-sectional view taken along the line XX of FIG.

FIG. 11 is a view in the direction of arrow XI-XI of FIG. 9.

[Explanation of symbols]

1 Side Rail 3 Axle 9 Arm (Lower Rod) 12 V Rod (Upper Rod) 16 Boss 17 Boss 21 Bracket 22 Rib A Portion between the upper row boss row group and the lower row boss row group

Claims (2)

[Claims] 1. A bracket having upper ends attached to outer surfaces of side rails forming a chassis frame of a vehicle so as to extend downward and support lower rods at the lower ends thereof. At the upper end that is attached to, the boss portions for bolt fastening are arranged in upper and lower two stages, and between the row group of the upper boss portion and the row group of the lower boss portion,
It is formed with an inclination so that it gradually protrudes outward in the vehicle width direction as it goes downward, and a rib with an appropriate number of threads extending in the vertical direction is formed on the inner surface in the vehicle width direction of the portion formed by the inclination. Bracket characterized by that. 2. A shaft holding portion is provided at a lower end portion so as to hold a stabilizer bar extending in the vehicle width direction, and an end portion of the stabilizer bar which is held by the shaft holding portion and extends outward in the vehicle width direction and an axle. The bracket according to claim 1, wherein the arm connecting between the lower part of the bracket and the lower part is supported as a member that also serves as a lower rod.