JPH05118368A - Manufacture for vibro-isolating bush bracket - Google Patents

Abstract

PURPOSE:To manufacture a bracket having good holding performance at a low cost with no preparing trouble required. CONSTITUTION:A vibro-isolating bush 2, in which a vibro-isolating rubber unit 23 is junction-arranged between inner and outer cylinders 21, 22, is press-fitted into an opening 14 of a bracket 1. The bracket 1 is constituted of a holding part 11 formed with the opening 14 and leg parts 12, 13 protruded from this holding part 11. Each half part 1A, 1B of thus constituting the holding part 11 and the leg parts 12, 13 is punched as an integral figure of almost line symmetry on a sheet of plate material, and the punched plate material is folded with the symmetrical line bordering to oppose each half part 1A, 1B, so that the opposed part is suitably connected to prepare the bracket 1. Accordingly, since the holding part 11 and the leg parts 12, 13 are integrally molded, no trouble of part control, welding assembly, etc., is required to reduce the cost. Since the leg parts 12, 13 are not welded to the holding part 11, no welding distortion is generated to fix the vibro-isolating bush 2 surely press-fitted into the opening 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method of manufacturing a bracket for holding and fixing an anti-vibration bush.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional bracket.
In the figure, a bracket 1 includes a cylindrical holding portion 11 and leg portions 12, 1 welded and fixed to two places on the lower peripheral surface of the holding portion 11.
3 and the mounting hole 1 provided at the lower ends of the legs 12 and 13
It is fixed to a base body such as a vehicle frame by 7. Holding part 1
An anti-vibration bush 2 is held in the tubular opening 14 of the first anti-vibration bush 2, and the anti-vibration bush 2 is formed by joining an anti-vibration rubber body 23 between an inner cylinder 21 and an outer cylinder 22 arranged concentrically. The outer cylinder 22 is press-fitted into the opening 14. The inner cylinder 21 is connected to a vibrator such as an engine.

[0003]

By the way, in the above-mentioned conventional bracket, since the holding portion and the leg portion are separately manufactured and welded and assembled, the labor of storing the parts and accurate positioning welding is required. There was a problem that the cost increase was unavoidable. In addition, the opening of the holding part that press-fits the outer cylinder needs to keep the error of the inner diameter small to achieve smooth press-fitting work and reliable holding, but the holding part is distorted when welding the legs and the opening is deformed. There was a risk of

The present invention has been made to solve the above problems, and an object of the present invention is to provide a manufacturing method capable of manufacturing an anti-vibration bush bracket having good holding performance at a low cost without requiring labor for manufacturing.

[0005]

The structure of the present invention will be described. A bracket 1 of a vibration-proof bush 2 in which a vibration-proof rubber body 23 is jointly arranged between an inner cylinder 21 and an outer cylinder 22 is provided. A holding portion 11 provided with an opening 14 for press-fitting and holding the cylinder 22;
Legs 1 protruding from the holding portion 11 and fixedly connected to the base body
In the method of manufacturing the bracket 1 composed of 2 and 13, the half portions 1A and 1B forming the holding portion 11 and the leg portions 12 and 13 are punched out as a substantially linearly symmetric integrated figure on one plate material, The punched plate material is bent at a line of symmetry so that the respective halves 1A and 1B face each other, and appropriate portions of the facing portions are joined to form the bracket 1.

[0006]

In the manufacturing method of the present invention, since the holding portion 11 and the leg portions 12 and 13 of the bracket 1 are integrally molded, the labor for parts management, welding and assembly is not required, and the cost can be reduced. Further, since the legs 12 and 13 are not welded to the holding portion 11, welding distortion does not occur in the holding portion 11, and the vibration-proof bushing is securely press-fitted and fixed in the opening 14.

[0007]

EXAMPLE 1 FIG. 1 shows a bracket 1 manufactured by the method of the present invention. The bracket 1 is a substantially triangular holding portion 1 in the upper half.
1 and a leg portion 1 extending downward from both sides of the bottom of the holding portion 11.
2 and 13, the holding portion 11 and the leg portions 12 and 13 are formed in the front and rear half portions 1A of the same shape,
1B. These half portions 1A, 1B are made of a continuous plate material as will be described later, one side edge is bent, and the other side edge is formed by connecting pieces 15, which are formed at upper and lower portions.
16 are overlapped and connected to each other.

An inner cylinder 21, an outer cylinder 22, and a vibration-proof rubber body 23.
The vibration-proof bushing 2 is formed by pressing the outer cylinder 22 into the opening 14 formed in the holding portion 11 and fixing it. The bracket 1 is fixed to a vehicle frame or the like by means of mounting holes 17 provided at the lower ends of the legs 12 of the front and rear parts 1A and 1B.

The manufacturing process of such a bracket will be described below. As shown in FIG. 2, one plate material is punched out so as to form symmetrical half portions 1A and 1B with respect to the line X. Each half 1
A and 1B are provided with holding portions 11A and 11B having openings 14A and 14B in the upper half, and a forked leg portion 12 in the lower half.
A, 13A, 12B, 13B and connecting pieces 15A, 16A, 15B, 16B protruding from the side edges thereof are formed.

The punched plate material is press-formed to further form the necessary portions (FIG. 3), and at this time, the connecting pieces 15A to 16B are formed.
The mounting hole 17 is bent upright. After that, the plate material is bent at the line of symmetry X as a boundary, and each half 1
A and 1B are opposed to each other (Fig. 4) and connecting pieces 15A and 15
B, 16A, 16B are riveted to complete a bracket.

[0011]

Second Embodiment The plate material may be punched in a symmetrical shape shown in FIG. That is, the line of symmetry X is set at the center of the long plate, and the holding portion 11 that becomes the upper half peripheral wall of the opening 14 (FIG. 7) on the side close to the line X.
A and 11B, and left and right leg portions 12A and 12B are formed at both ends. The punched plate material is press-molded to form the connecting pieces 15A, 15B, 16A, 16B and the leg portions 12A, 1
Bend both side edges of 2B downward (FIG. 6). The halves 1A, 1B are made to face each other by bending so as to form a smooth curved surface with the line of symmetry X as a boundary (FIG. 7), and the connecting pieces 15A, 15B, 16A, 16B that are abutted at this time are riveted and joined. Bracket.

In each of the above embodiments, the connecting pieces may be connected by means other than rivets.

[0013]

As described above, according to the manufacturing method of the present invention, the vibration-proof bush bracket can be manufactured easily and at low cost, and since the welding is not required, the opening for holding the vibration-proof bush is distorted. It does not occur and reliable holding is possible.

[Brief description of drawings]

FIG. 1 is a perspective view of a bracket according to an embodiment of the present invention.

FIG. 2 is a perspective view of a plate material in a bracket manufacturing process.

FIG. 3 is a perspective view after plate material press molding in the bracket manufacturing process.

FIG. 4 is a perspective view after bending and forming a plate material in a bracket manufacturing process.

FIG. 5 is a perspective view of a plate material in a bracket manufacturing process showing another embodiment of the present invention.

FIG. 6 is a perspective view after plate material press molding in the bracket manufacturing process.

FIG. 7 is a perspective view after bending and forming a plate material in a bracket manufacturing process.

FIG. 8 is a perspective view of a conventional bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 1A, 1B Half part 11 Bracket 12, 13 Leg part 14 Opening 15, 16 Connecting piece 2 Vibration-proof bracket 21 Inner cylinder 22 Outer cylinder 23 Vibration-proof rubber body

Claims (1)

[Claims] 1. A bracket of a vibration-proof bush in which a vibration-proof rubber member is jointly arranged between an inner cylinder and an outer cylinder, the holding part having an opening for press-fitting and holding the outer cylinder, and the holding part. In a method of manufacturing a bracket composed of a leg portion which is connected and fixed to a protruding base body, each half portion which constitutes the holding portion and the leg portion is punched and punched as a substantially line-symmetrical integrated figure on a single plate material. A method for manufacturing an anti-vibration bush bracket, characterized in that a plate material is bent at a line of symmetry so that each of the above-mentioned halves faces each other, and appropriate portions of the facing portions are joined together to form the above bracket.