JPH11218172A - Bush mounting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heighten material strength by providing one or a plurality of reinforcing walls between an avoiding recessed part and other wall parts excluding the avoiding recessed part in a hollow hole of the avoiding recessed part. SOLUTION: A reinforcing wall of I-shape cross section is provided integrally with a member body 1 in such a mode as to be laid from an innermost part 6a positioned at the innermost part of an avoiding recessed part 6, to a lower external wall part 12 across a hollow hole. The hollow hole 4 is partitioned into two hollow holes 4a, 4b by this reinforcing wall 7. This reinforcing wall 7 functions as a reinforcing member for supporting the avoiding recessed part 6 and is laid over the whole area in the axial direction of the hole. The avoiding recessed part 6 is therefore positively reinforced by this reinforcing wall 7 of I-shape cross section. Accordingly, even in the case of tensile-compressive load or bending load being applied to a bush mounting member A to generate stress concentration on the avoiding recessed part 6, the generation of a crack or braking to the avoiding recessed part can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bush mounting member used for a suspension arm, an engine mount, a frame and the like of an automobile or the like.

[0002]

2. Description of the Related Art As shown in FIG. 5, a bush mounting member (30) used for a suspension arm, an engine mount, a frame, or the like of an automobile or the like generally has a rod-shaped or other shaped member main body (31) and both ends or both ends thereof. A bush mounting portion (38) having a circular mounting hole (39) for mounting a cylindrical anti-vibration bush (20) at one end. As this bush (20),
A shaft member (21) positioned at the center, and the shaft member (2);
The rigid sleeve (2) which is disposed around 1) and whose outer diameter is set slightly larger than the diameter of the mounting hole (39).
2) is a rubber elastic body (23) interposed between them.
The bush (20) is generally used, and is mounted and fixed to the bush mounting member (30) by, for example, press-fitting the bush (20) into the mounting hole (39).

[0003] The bush mounting member (30) as described above has conventionally been manufactured from a ferrous material by a method such as a sheet metal press. However, the ferrous material has a drawback that it is heavy in weight.

Therefore, in order to reduce the weight, a bush mounting member (30) made of a lightweight aluminum (including its alloy, hereinafter the same) material has been used. In the case of aluminum, since the extensibility is good, an extruded profile in which the member main body (31) and the bush mounting portion (38) are integrally formed is exclusively used. The bush mounting member (30) is sliced and cut to a required thickness.

Recently, in order to further reduce the weight, the member main body (31) is provided with one or a plurality of hollow holes (32), (33) and (34) to reduce the weight of the hollow holes. In some cases, the entire weight of the bush mounting member (30) has been reduced.

The bush mounting member (3)
0) is rarely used in a wide space, and is often used in a narrow space where other members are arranged in a complicated manner as seen in an internal structure of an automobile or the like. For this reason, the bush mounting member must be provided at a position where there is a possibility of structural contact with another member. Therefore, conventionally, in order to avoid contact with another member without changing the arrangement position of the bush mounting member (30), as shown in FIG. Of the present invention is known in which an avoiding concave portion (36) formed of a bent portion into the hollow hole (34) is formed.

[0007]

However, if the above-mentioned avoiding concave portion (36) is formed in the bush mounting member (30) provided with the hollow hole (34) to reduce the weight of the member, When a tensile / compressive load or a bending load is applied to the mounting member (30), its avoidable concave portion (3
There is a drawback in terms of material strength such that stress is concentrated in 6), causing bending, cracking, and further breaking.

The present invention has been made in view of the above-described problems,
In the case of a bush mounting member provided with a hollow hole for weight reduction, in order to avoid other members arranged adjacently, in a case where an avoiding concave portion formed of a bent portion into the hollow hole of the outer wall portion is formed. Even if there is, an object of the present invention is to provide a bush mounting member that can maintain or increase the material strength.

[0009]

In order to achieve the above object, the present invention relates to a member for mounting a bush, wherein a bush mounting portion for mounting a bush is formed on at least one end of a member main body. The main body is provided with one or a plurality of hollow holes, and an avoiding concave portion formed of a bent portion into the hollow hole of the outer wall is formed in order to avoid other members arranged adjacently. One or more reinforcing walls are provided in the hollow hole in which the recessed portion is formed so as to be bridged between the avoiding recess and another wall portion other than the avoiding recess. It is characterized by the following.

According to this, since the avoiding recess is reinforced by the reinforcing wall, even if a tensile / compression load or a bending load is applied to the member and stress is concentrated on the avoiding recess, the avoiding recess is bent. And cracks can be prevented, and furthermore, destruction can be prevented.

The basic mode of the reinforcing wall is an I-shaped cross section extending from the inner wall of the avoiding concave portion to the inner wall of the hollow hole facing the avoiding concave portion. Not limited to this, for example, a cross section having a V-shaped cross section or an inverted V-shaped cross section having the apex of the avoidance concave portion may be employed. According to this, the avoiding concave portion can be reinforced more reliably.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a suspension arm member of an automobile will be described in detail with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention.

In these figures, (A) is a bush mounting member. The bush mounting member (A) is composed of a rod-shaped member main body (1) and bush mounting portions (8) (8) integrally formed at both ends in the longitudinal direction thereof. It is formed by cutting to a predetermined thickness in a direction perpendicular to the vertical direction.

The member main body (1) is provided for
Hollow holes with trapezoidal cross section at both ends in the longitudinal direction of the main body (2)
(2) is provided through the member body (1) in the thickness direction, and five hollow holes (3) and (4) having a rectangular cross section are provided between the two trapezoidal hollow holes (2). Compartment wall (5) between each other
Through the member body (1) in the thickness direction.
In addition, one of the hollow holes (3) and (4) has an avoidance recess (6) formed in the middle of the upper outer wall (11).

As shown in FIG. 3, this avoiding recess (6) is used to avoid the other member (B) arranged adjacent to the bush mounting member (A) so as to avoid the upper outer wall of the member body (1). The portion is bent into the hollow hole (4), and is formed so as to substantially follow the contour of the other member (B).

Further, the section I extends from the innermost innermost portion (6a) of the avoiding recess (6) to the lower outer wall portion (12) across the hollow hole. A reinforcing wall having a U-shape is provided integrally with the member body (1), and the reinforcing wall (7) allows two hollow holes (4) to be formed.
a) and (4b). The reinforcing wall (7) functions as a reinforcing member for supporting the avoiding recess (6), and is provided over the entire area in the hole axis direction. Therefore, the avoiding recess (6) is reliably reinforced by the reinforcing wall (7) having an I-shaped cross section, so that a tension / compression load or a bending load is applied to the bush mounting member (A), and the avoiding recess (6) is applied. Even if stress is concentrated on (6), it is possible to prevent cracks or breakage there.

On the other hand, the bush mounting portion (8) is a portion where the bush (20) is mounted, and the bush (20) is mounted in a circular mounting hole (9) provided in the bush mounting portion (8). By press-fitting. The bush (20) mounted on the bush mounting portion (8) includes a shaft member (21) positioned at the center,
A solid type is used in which a cylindrical rigid sleeve (22) disposed around the support member (21) is connected to a rubber elastic body (23) inserted therebetween. The outer diameter of the rigid sleeve (22) is set slightly larger than the inner diameter of the mounting hole (9). Therefore, when the bush (20) is mounted on the bush mounting portion (8), a bush mounting member as shown in FIG. 2 is obtained.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the reinforcing wall (8) formed in the hollow hole (4) is formed not in the reinforcing wall (8) having an I-shaped cross section but in an inverted V-shaped cross section. That is, the inverse V
The vertex (10a) of the U-shaped reinforcing wall (10) is located at the innermost part (6a) of the avoidance recess (6), and the two feet (10b) (10b) of the reinforcing wall (10) are provided. ) Extend obliquely across the hollow hole (4) to the lower outer wall portion (12), and are provided integrally with the member main body (1) over the entire area in the hole axial direction. Therefore, the avoiding recess (6) is I
Reinforced more securely than in the case of the U-shaped reinforcing wall (7),
Even if a large tensile / compression load or bending load is applied to the bush mounting member (A) and stress concentrates on the avoidance concave portion (6), it can withstand sufficiently. In the embodiment shown in FIG. 4, except that the reinforcing wall (10) has an inverted V-shaped cross section, it has the same configuration as that shown in FIGS. 1 to 3. Is omitted.

In the above-described embodiment, the reinforcing wall is formed to have an I-shaped cross section or an inverted V-shaped cross section. However, the present invention is not limited to these. It may be a V-shaped reinforcing wall with the side as the top,
Although the reinforcing walls (7) and (10) are provided so as to extend from the avoiding concave portion (6) to the outer wall portion (12) opposed thereto,
It may be provided in such a manner as to extend from the avoidance concave portion (6) to the partition wall (5). Also, a plurality of reinforcing walls may be provided instead of one, and the reinforcing walls are provided by integral extrusion with the member main body, but may be provided separately by welding or the like after the formation of the member main body.

As the bush mounting portion (8), a press-fit type in which the bush (20) is fitted into the mounting hole (9) by press-fitting is shown. May be the bush mounting member.

As a vibration isolating bush (20), a spindle member (21) located at the center and a cylindrical rigid sleeve (22) provided around the spindle member (21) are provided.
The solid type connected by a rubber elastic body (23) interposed therebetween is shown, but there is no outer rigid sleeve (22) and the inside of the rubber elastic body (23) has an outer peripheral surface. A type in which a liquid is sealed from the provided injection port and a vibration-proof function is exhibited by the sealed liquid may be used.

Further, although aluminum is used as the material of the bush mounting member (A), other materials such as an iron-based material other than aluminum may be used.

Although the bush mounting member having the bush mounting portions (8) at both ends of the member main body (1) is shown, one bush mounting portion or three or more mounting portions are mounted on the member main body (1). The member body (1) may be provided with a portion, and the shape of the member main body (1) is not limited to a rod shape, and another shape such as an A shape may be adopted. Further, the structure provided with the reinforcing wall may be used not only for the suspension arm member but also for other bush mounting members such as an engine mount and other frames.

[0025]

According to the present invention, as described above, one or a plurality of reinforcing walls are formed in the hollow hole in which the avoidance concave portion is formed by the other wall other than the avoidance concave portion. Since it is provided so as to be bridged between the first and second parts, the avoidance-like concave portion can be reinforced by the reinforcing wall. Therefore, even if a tensile / compression load or bending load is applied to the member and stress concentration occurs in the concave portion, it is possible to prevent bending and cracks from being generated from the concave portion for avoiding the same, and to prevent further destruction. ,
Material strength can be maintained or increased.

When the reinforcing wall has a V-shaped cross section or an inverted V-shaped cross section having the apex of the avoiding recess as a vertex, the avoiding recess can be more reliably reinforced. Therefore, it is possible to withstand larger tensile / compression loads and bending loads.

[Brief description of the drawings]

FIG. 1 is a plan view showing a member for mounting a bush according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a bush is fitted into a bush mounting portion.

FIG. 3 is an enlarged perspective view of a main part of the bush mounting member of FIG. 1;

FIG. 4 is an enlarged perspective view of a main part of a bush mounting member according to another embodiment of the present invention.

FIG. 5 is a perspective view of a conventional bush mounting member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Member main body 2, 3, 4 ... Hollow hole 5 ... Partition wall 6 ... Recessed recess 7 ... Reinforcement wall 8 ... Bush mounting part 9 ... Bush mounting hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koji Uchino 3600, Gezu, Kita-gaiyama, Komaki-shi, Aichi Prefecture Inside Tokai Rubber Industries Co., Ltd. (72) Inventor Naoki Nishikawa, 224 Kaiyamacho, Sakai City, Showa Aluminum Co., Ltd.

Claims (2)

[Claims] 1. A bush mounting member in which a bush mounting portion for mounting a bush is formed at at least one end of a member main body, wherein the member main body is provided with one or a plurality of hollow holes. , In order to avoid other components located adjacent to
An avoiding recess formed by a bent portion into the hollow hole of the outer wall portion is formed. In the hollow hole in which the avoiding concave portion is formed, one or a plurality of reinforcing walls are formed by the avoiding recess and the avoiding recess. A member for mounting a bush, wherein the member is provided so as to be bridged between another wall portion other than the concave portion. 2. The member for mounting a bush according to claim 1, wherein the reinforcing member has a V-shaped cross section or an inverted V-shaped cross section having the apex of the avoiding concave portion as an apex.