JPH0968248A - Bracket for vibrationproof rubber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bracket for vibrationproof rubber which can save mate rial to be used, and can thereby lower its cost. SOLUTION: Paired mounting seat parts 2 and 2 are made up of mounting seat faces 2a and 2a, outer side wall parts 2c and 2c, inner side wall parts 2d and 2d and lateral wall parts 2e, 2e, 2e and 2e, which are formed into a flat shape each by drawing the center part of a metallic plate A in a rectangular shape, and swelling the aforesaid center part outside, and of a cylindrical hold part 1 which is formed by curving the metallic plate A into a cylindrical form, and has both its end parts combined with each other by welding. And mounting bolts 3 and 3 are pressed in respective mounting faces 2a and 2a through holding holes 2b and 2b so as to be held therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, to attach a vibration-proof rubber such as a cylindrical engine mount having a rubber elastic body interposed between an inner cylinder and an outer cylinder to a vehicle body of an automobile. Bracket for anti-vibration rubber

[0002]

2. Description of the Related Art Conventionally, as this type of bracket,
The ones shown in FIGS. 9 and 10 are known. This bracket is made of metal in a cylindrical shape, and is formed by bending a cylindrical holding portion 32 for holding a cylindrical vibration-proof rubber and a metal plate in a U-shaped cross section, and a pair of flat surface portions facing each other. Each of the arcuate distal end surfaces is composed of a mounting seat portion 31 joined to the outer peripheral surface of the tubular holding portion 32 by welding, and a pair of mounting bolts 33 mounted on the mounting seat portion 31.

As another conventional bracket, FIG.
As shown in FIGS. 1 and 12, there is known one formed by bending one oval metal plate into a U-shaped cross section. This bracket is provided on both sides of the mounting seat 41 and the mounting seat 41 provided at the center of the metal plate,
It is composed of a pair of holding plates 42 having circular holding holes 42a for holding both ends of the outer periphery of the cylindrical vibration-proof rubber, and a pair of mounting bolts 43 are mounted on the mounting seat portion 41.

[0004]

By the way, in the bracket shown in FIGS. 9 and 10, the cylindrical holding portion 32 for holding the vibration isolating rubber is formed so as to completely cover the outer peripheral portion of the vibration isolating rubber. The advantage is that the anti-vibration rubber can be held securely. However, on the other hand, the amount of material used is large, and since the cylindrical holding portion 32 and the mounting seat portion 31, which are separately formed, are welded to each other, the cost is increased.

On the other hand, the brackets shown in FIGS. 11 and 12 have a structure that is formed by processing a single metal plate, and therefore have an advantage that the cost can be reduced. However, in the case of this bracket, since the outer peripheral ends of the anti-vibration rubber are held by the pair of holding plates 42, the outer peripheral part of the anti-vibration rubber is exposed from the portion between the pair of holding plates 42. Therefore, it is necessary to apply anti-corrosion treatment such as painting to the surface of the outer cylinder metal fitting arranged on the outer periphery of the anti-vibration rubber, or to form the outer cylinder member with aluminum etc. This will lead to higher costs.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a vibration-proof rubber bracket capable of reducing the cost by reducing the materials used.

[0007]

The invention according to claim 1 for solving the above-mentioned problems comprises one rectangular metal plate, wherein the central part of the metal plate is subjected to a drawing process and bulged outward. A mounting projection having a mounting seat surface formed thereon; and a tubular holding portion formed by bending the metal plate into a tubular shape and joining both ends thereof by welding to hold a vibration-proof rubber. It is characterized by being configured.

According to a second aspect of the present invention, in the anti-vibration rubber bracket according to the first aspect, slits are formed on both sides of a portion of the metal plate that forms the mounting projection before the drawing of the mounting projection is performed. Has been done. According to a third aspect of the present invention, in the vibration-proof rubber bracket according to the first or second aspect, the attachment projection has a holding hole through which the attachment bolt is inserted and held.

[0009]

In the vibration-proof bracket of the present invention, the mounting protrusion is formed by drawing a part of the cylindrical holding portion formed of a single metal plate. As a result, the mounting protrusion is formed by effectively utilizing a part of the cylindrical holding portion, so that the metal plate of the minimum necessary size can be used, and the cost can be reduced by saving the used material. Becomes

Further, the anti-vibration rubber bracket of the present invention is
Since it is configured so that the outer peripheral portion of the anti-vibration rubber held by the cylindrical holding part is not exposed, there is no need to apply anti-corrosion treatment such as painting to the outer peripheral surface of the anti-vibration rubber, which also reduces the Cost can be reduced. Then, if slits are formed on both sides of the portion forming the mounting projection of the metal plate before performing the drawing processing of the mounting projection, occurrence of breakage of the metal plate is suppressed, and the drawing processing is facilitated. Become.

If a holding hole through which the mounting bolt is inserted and held is formed in the mounting protrusion, the mounting bolt can be attached to the holding hole in advance to easily mount the anti-vibration rubber bracket. Is possible.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] FIG. 1 is a front view of a vibration isolating rubber bracket according to the present embodiment, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 4 (a) to 4 (d) are explanatory views showing a manufacturing process of the anti-vibration rubber bracket according to the present embodiment.

The anti-vibration rubber bracket of the present embodiment has one
A cylinder that holds a cylindrical anti-vibration rubber, which is formed by pressing a square metal plate, and then bends the metal plate into a cylindrical shape and welds the opposite end surfaces that are abutted to each other. And a pair of mounting projections 2 and 2 which are formed by swelling a part of the cylindrical holding portion 1 to the outside by drawing and have a rectangular flat mounting seat surface 2a, 2a on the bottom thereof. It is composed of.

The mounting projections 2 and 2 face the outer wall portions 2c and 2c and the outer wall portions 2c and 2c that extend tangentially from the cylindrical holding portion 1 and intersect the mounting seat surfaces 2a and 2a at substantially right angles. Inner side wall portions 2d and 2d, outer side wall portions 2c and 2c, and inner side wall portion 2
a pair of lateral side wall portions 2e, 2e, 2e, which connect d and 2d,
2e, and the inner space is formed by being surrounded by the side wall portions 2c to 2e and the mounting seat surfaces 2a, 2a.

The respective mounting seat surfaces 2a, 2a are formed so as to be located on the same plane, and the holding holes 2b, 2b formed in the central portions of the respective mounting seat surfaces 2a, 2a are provided in the internal space. The mounting bolts 3 are press-fitted and held so that the head is housed inside. The anti-vibration rubber bracket of this embodiment is
It is manufactured through the steps shown in FIGS.

First, as shown in FIG. 4 (a), one metal plate A formed in a rectangular shape having a predetermined size is prepared. Next, as shown in FIG. 4B, the metal plate A is drawn at a symmetrical position near the center of the longitudinal direction of the metal plate A and at a predetermined position of the center portion in the width direction to bulge outward in a substantially triangular mountain shape. As a result, the mounting seat surfaces 2a, 2a, the outer side wall portions 2c, 2c, the inner side wall portions 2d, 2d and the pair of lateral side wall portions 2e, 2e, 2e, 2 are formed.
A pair of mounting protrusions 2 made of e are formed. Therefore, at this stage, the respective mounting seat surfaces 2a, 2a are not located on the same plane.

Then, as shown in FIG. 4 (c), the mounting seat surfaces 2a, 2a are subjected to press punching to hold holes 2
b and 2b are formed, and both ends of the metal plate A are bent so that the subsequent metal plate A can be easily bent.
Next, as shown in FIG. 4 (d), after the mounting bolts 3 are press-fitted and fixed in the holding holes 2b, 2b, the metal plate A is bent into a tubular shape and the abutted end surfaces thereof are welded to each other. Bonding is performed to form the bonded fixing portion 1a. As a result, the tubular holding portion 1 is formed by the metal plate A that is curved in a tubular shape, and the mounting seat surfaces 2a and 2a of the pair of mounting projections 2 and 2 have the metal plate A.
Due to the bending, the vibration damping rubber is positioned on the same plane, and the vibration isolation rubber bracket shown in FIGS. 1 to 3 is completed.

The anti-vibration rubber bracket of the present embodiment produced in this manner has a cylindrical anti-vibration rubber formed by interposing a rubber elastic body between the inner tubular metal member and the outer tubular metal member. The mounting bolts 3 and 3 are press-fitted into the holding portion 1 and mounted, and are previously mounted in the holding holes 2b and 2b of the mounting seat surfaces 2a and 2a.
It is used by being attached to the intended attachment part of the automobile.

As described above, in the anti-vibration rubber bracket of this embodiment, the mounting protrusions 2, 2 are formed by drawing a part of the cylindrical holding portion 1 made of one metal plate. Therefore, it can be manufactured by using the minimum necessary metal plate, and it is possible to reduce the material used and reduce the cost. Further, the anti-vibration rubber bracket of the present embodiment is configured such that the outer peripheral portion of the anti-vibration rubber held by the tubular holding portion 1 is completely covered and the outer tubular metal fitting of the anti-vibration rubber is not exposed. Therefore, it is not necessary to apply anticorrosion treatment such as painting on the surface of the outer tubular metal member or to form the outer tubular metal member with an aluminum material or the like, which can contribute to cost reduction.

In this embodiment, the cylindrical holding portion 1 is formed in a cylindrical shape. However, depending on the shape of the anti-vibration rubber to be held, an elliptic cylindrical shape, an elongated cylindrical shape, or a polygonal cylindrical shape in some cases. It can be formed in any shape. Further, in the present embodiment, the pair of mounting projections 2 and 2 are provided, but the number of mounting projections to be provided can be appropriately selected as necessary.

[Second Embodiment] FIG. 5 is a front view of a vibration isolation rubber bracket according to the present embodiment, and FIG.
FIG. 7 is a cross-sectional view taken along the line VI, FIG. 7 is a bottom view of the anti-vibration rubber bracket, and FIGS. 8A to 8D are explanatory views showing a manufacturing process of the anti-vibration rubber bracket according to the present embodiment. It is a figure.

The anti-vibration rubber bracket of this embodiment is basically the same as that of the first embodiment, except that the mounting projections are drawn on both sides of the portion forming the mounting projections of the metal plate. The difference is that a slit is formed in front. That is, this anti-vibration rubber bracket is formed by pressing a single square metal plate, and has a tubular holding portion 11 for holding the tubular anti-vibration rubber and the tubular holding portion 11. A flat mounting seat surface 1 formed by bulging a part outward
2a, 12a, outer side wall portions 12c, 12c and inner side wall portion 1
It is composed of a pair of mounting projections 12 and 12 composed of 2d and 12d, and mounting bolts 13 and 13 are inserted and held in the respective mounting seat surfaces 12a and 12a through holding holes 12b and 12b.

When manufacturing this anti-vibration rubber bracket, first, as shown in FIG. 8A, a predetermined position in the center of the prepared metal plate B, that is, a mounting projection is formed later. Two pairs of slits 14 on both sides of the parts 11b, 11b
To form Next, as shown in FIG. 8B, the metal plate B
A predetermined position of the central portion of the, i.e., a portion between each pair of slits 14 is subjected to a drawing process and bulged outward, whereby the mounting seat surfaces 12a, 12a, the outer side wall portions 12c, 12c and the inner side wall portion 12d, A pair of mounting protrusions 12 and 1 made of 12d
Form 2 Therefore, in this case, the mounting protrusions 12, 12
The lateral side wall portions 2e and 2e are not formed in the above, unlike the first embodiment. When the drawing is performed, the slits 14 are provided on both sides of the drawing, so that the occurrence of breakage is suppressed and the drawing can be easily performed.

Then, as shown in FIG. 8 (c), the mounting seat surfaces 12a, 12a are stamped to form holding holes 12b, 12b, and both ends of the metal plate B are bent. . Next, as shown in FIG. 8D, after mounting bolts 13 and 13 are press-fitted into the holding holes 12b and 12b, the metal plate B is bent into a tubular shape and its both end surfaces are welded to each other by welding. By joining and forming the joining and fixing portion 11a, the vibration isolation rubber bracket shown in FIGS. 5 to 7 is completed.

As described above, according to the anti-vibration rubber bracket of the present embodiment, since the slits 14 are formed on both sides of the portions 11b, 11b forming the mounting projection of the metal plate B, the diaphragm is then drawn. When the mounting projection 12 is formed by processing, it is possible to suppress the occurrence of breakage and easily perform the drawing process. Further, also in the case of the anti-vibration rubber bracket of the present embodiment, as in the case of the first embodiment, it can be manufactured by using the minimum necessary metal plate, and it is possible to reduce the materials used and reduce the cost. There is an effect such as being able to.

[0026]

According to the anti-vibration rubber bracket of the present invention, the mounting is made of one rectangular metal plate, and is formed by subjecting the central part of the metal plate to drawing and bulging outward. It comprises a mounting projection having a seat portion, and a tubular holding portion for holding a vibration-proof rubber, which is formed by bending the metal plate into a tubular shape and joining both ends thereof by welding. Therefore, it can be manufactured by using the minimum necessary metal plate, and it is possible to reduce the material used and reduce the cost.

Further, since the outer peripheral portion of the vibration-proof rubber held by the cylindrical holding portion can be configured not to be exposed,
It is not necessary to apply anticorrosion treatment such as coating to the outer peripheral surface of the vibration-proof rubber, which can contribute to cost reduction. If slits are formed on both sides of the portion of the metal plate that forms the mounting protrusion before the mounting protrusion is drawn, it is possible to suppress the occurrence of breakage of the metal plate and facilitate the drawing process. It can be carried out.

If the mounting projection has a holding hole through which the mounting bolt is inserted and held, the mounting bolt can be preliminarily mounted in the holding hole. It can be easily performed.

[Brief description of drawings]

FIG. 1 is a front view of an anti-vibration rubber bracket according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a bottom view of the anti-vibration rubber bracket according to the first embodiment of the present invention.

4 (a) to 4 (d) are explanatory views showing a manufacturing process of the anti-vibration rubber bracket according to the first embodiment of the present invention.

FIG. 5 is a front view of the anti-vibration rubber bracket according to the second embodiment of the present invention.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a bottom view of the anti-vibration rubber bracket according to the second embodiment of the present invention.

8 (a) to 8 (d) are explanatory views showing a manufacturing process of the anti-vibration rubber bracket according to the second exemplary embodiment of the present invention.

FIG. 9 is a front view of a conventional anti-vibration rubber bracket.

FIG. 10 is a side view of a conventional anti-vibration rubber bracket.

FIG. 11 is a front view of another conventional anti-vibration rubber bracket.

FIG. 12 is a side view of another conventional anti-vibration rubber bracket.

[Explanation of symbols]

1, 11 ... Cylindrical holding portion 1a, 11a ... Joining and fixing portion 2, 12 ... Mounting projection 2a, 12a ... Mounting seat surface 2
b, 12b ... Holding holes 2c, 12c ... Outer wall portions 2d, 12d ... Inner wall portion
2e ... Side wall part 3, 13 ... Mounting bolt 14 ... Slit A, B ...
Metal plate

Claims (3)

[Claims] 1. A mounting projection comprising a single rectangular metal plate, the mounting projection having a mounting seat surface formed by subjecting a central portion of the metal plate to a drawing process and bulging outward. A vibration-proof rubber bracket comprising: a tubular holding portion that holds the vibration-proof rubber and is formed by bending the tube into a tubular shape and joining both ends thereof by welding. 2. The anti-vibration rubber bracket according to claim 1, wherein slits are formed on both sides of a portion of the metal plate where the mounting projection is formed before the drawing of the mounting projection is performed. 3. The holding hole into which the mounting bolt is inserted and held is formed in the mounting projection.
Anti-vibration rubber bracket described.