JPH0996328A - Bracket for vibration control rubber and it manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a bracket for a vibration control rubber by a simple method. SOLUTION: A plate member 30 is obtained by blanking a metallic plate using a specified die, and is provided with a tail part 31, and a head part 32 provided over an extension line in the longer direction. The head part is divided into a base part 33 and a lug part 34 by boundaries L2 and L3 in the longitudinal direction which are turned out to be folding lines when the head part is bent later on. The lug part is bent at a right angle with respect to the base part while the boundaries L2 and L3 are being made as a boundary so as to be formed into side wall parts 22a and 22b normal to the base part. Furthermore, the head part is folded to the direction opposite to the side wall part while a boundary L1 in the width direction is being made as a boundary. The tail part is bent so as to be formed into a cylindrical part 10. The bracket for a vibration control rubber provided with arm part 20 and the cylindrical part can thereby be obtained by fixing a circular arc shaped part to the outer circumferential portion of the cylindrical part by welding in a state that the circular arc shaped parts 34a and 34b are tightly attached to the cylindrical part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration rubber bracket for attaching an engine mount, a cab mount, etc. of an automobile or the like to a vehicle body, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, this type of anti-vibration rubber bracket is shown in FIG. 6, for example. In the manufacture of this anti-vibration rubber bracket, first, the cylindrical member 1 is formed by winding a rectangular metal plate. Next, a symmetrical deformed plate 2 as shown in FIG. 7A is formed by punching. The deformed plate 2 includes a base portion 2a inside a boundary line N shown by a dotted line and a pair of ear portions 2b protruding outside thereof.
And a strip portion 2c having a substantially constant width that connects between the ears 2b. A pair of mounting holes 2d are provided in the semicircular portion of the base 2a. The outer edge of the ear 2b extending from the side end 2a1 of the base 2a is an arcuate portion 2b1. This deformed plate 2
By bending and drawing with the boundary line N shown in FIG. 7A as a boundary, the seat portion 3a and the side wall portions 3b and 3c perpendicular to the seat portion 3a are formed as shown in FIG. 7B. The arm member 3 which has is obtained. Then, the outer peripheral surface of the cylindrical member 1 and the side wall end portion 3b1 (corresponding to the arc-shaped portion 2b1 of the ear portion 2b) of the arm member 3 are brought into close contact with each other and joined by welding, as shown in FIG. A vibration-proof rubber bracket can be obtained.

[0003]

However, in the case of this manufacturing method, there is a problem that the cylindrical member 1 and the arm member 3 have to be formed separately, which requires a long process and a high manufacturing cost. Further, when the cylindrical member 1 and the arm member 3 are welded, the welding work must be performed while supporting each other so as not to separate them, and the work is complicated. The present invention is intended to solve the above problems, and an object thereof is to provide a vibration-proof rubber bracket manufactured by a simple method and a manufacturing method thereof.

[0004]

Means for Solving the Problems and Effects of the Invention In order to achieve the above-mentioned object, the structural feature of the invention according to claim 1 is that an anti-vibration rubber is attached to a supporting portion or a supported portion. A bracket for a vibrating rubber, which is made of one metal plate member having a strip-shaped tail portion formed on one end side in the longitudinal direction and a head portion formed wider than the tail portion formed on the other end side, The width direction boundary in which the plate material divides the tail part and the head part and extending in the width direction, and the head part is provided with a longitudinal direction boundary extending in the longitudinal direction from the width end of the tail part, and the ear protruding from the longitudinal direction boundary part to the head part. The ear part has an arcuate part protruding outward in the width direction from the width direction boundary, and the band-shaped tail part is bent and deformed into a tubular shape so that the end of the tail part abuts or approaches the width direction boundary. Formed along the widthwise boundary with the cylindrical part that has a hole into which the anti-vibration rubber formed is inserted. First bent portion, a second bent portion formed along the boundary in the longitudinal direction, and a first bent portion which is bent so that the head portion extends outward from the tubular portion. A seat portion extending substantially flat from the side wall portion, a side wall portion formed from an ear portion bent from the second bent portion and extending substantially at a right angle to the seat portion, and a side wall portion being formed. Thus, the arm portion provided with the arc-shaped portion and the outer peripheral portion of the tubular portion are joined and fixedly joined together is integrally formed.

In the invention according to claim 1 configured as described above, the tail portion of one metal plate member is bent and deformed to form a tubular portion, and the head portion is bent to form the arc-shaped portion of the outer peripheral portion of the tubular portion. By joining to the to form the arm portion, the vibration-proof rubber bracket including the tubular portion and the arm portion is integrally formed. At this time, the side wall portion can easily join and fix the tubular portion and the arm portion, and the tubular portion can be firmly held by the arm portion. As a result, a strong anti-vibration rubber bracket can be manufactured more easily and can be provided at a lower cost than conventional products.

Further, the structural feature of the invention according to claim 2 is that a strip-shaped tail portion formed on one end side in the longitudinal direction and a head portion formed wider than the tail portion formed on the other end side. The head portion has an ear portion protruding from a widthwise end of the tail portion in a longitudinal direction and protruding from a longitudinal boundary, and the ear portion has a circular arc portion protruding from a widthwise boundary separating the tail portion and the head portion from each other. A step of forming a metal plate material by punching, and a band-shaped tail part is bent and deformed into a tubular shape, and the end of the tail part is abutted or brought close to the width direction boundary, and a vibration-proof rubber is inserted. A step of forming a tubular portion having a hole, and a first bent portion is provided by bending the head along the width direction, and the head is projected outward from the tubular portion from the first bent portion. And bending the head along the longitudinal boundary Two bends are provided and are obtained from a seat extending substantially flat from the first bend and an ear folded from the second bend extending substantially perpendicular to the seat. Forming a side wall part
And a step of joining the arcuate portion and the outer peripheral portion of the cylindrical portion to form a joint fixing portion, and forming an arm portion including a seat portion and a side wall portion.

In the invention according to claim 2 configured as described above, by using each of the above steps, the tubular portion and the arm portion are integrally formed from the plate material and are joined and fixed to each other so that the anti-vibration rubber bracket is formed. Is obtained. As a result, the manufacturing process is simplified compared to the conventional anti-vibration rubber bracket,
Product cost can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Figs. 1 to 3 are perspective, side and plan views of a vibration-proof rubber bracket according to the embodiment. Is schematically illustrated by. The anti-vibration rubber bracket is obtained by punching a plate material 30 of a metal plate such as iron using a predetermined die and subjecting the plate material 30 to bending and drawing, and from the cylindrical portion 10 and the arm portion 20. Become.
As shown in FIG. 4, the plate member 30 extends in the longitudinal direction, includes a belt-shaped tail portion 31 on one end side in the longitudinal direction, and a tail portion 31 on the other end side.
Head 3 with base 33 and ears 34 that are wider than
2 is provided. The tail portion 31 and the head portion 32 are separated by a width direction boundary L1 (shown by a dotted line) extending in the width direction, and the ear portion 3
4 is separated from the base portion 33 by a pair of longitudinal boundaries L2 and L3 extending in the longitudinal direction from the width ends 31b and 31c of the tail portion 31.

The cylindrical portion 10 is formed by bending the tail portion 31 of the plate member 30 into a tubular shape. For more information,
The tail end 31a is formed so as to abut or approach the widthwise boundary L1 of the plate member 30. As shown in FIG. 2, the arm portion 20 is formed by bending the head portion 32 of the plate member 30 so as to project outward from the cylindrical portion 10 at the widthwise boundary L1, and along the widthwise boundary L1. It is formed integrally with the cylindrical portion 10 via the formed first bent portion 10a. As shown in FIGS. 2 and 5, the arm portion 20 is
The head 32 is bent so as to project outward from the cylindrical portion 10 and extends substantially flat from the first bent portion 10a so that it can be attached to a vehicle body (not shown) or the like. The part 21 and at least the longitudinal boundaries L2, L3
A pair of opposed side wall portions 22a and 22b extending substantially at right angles to the seat portion 21 are formed from the second bent portions 23 and 24 formed along the side wall portions 22a and 22b. The seat portion 21 is provided with mounting holes 21a and 21b.

By forming the side wall portions 22a and 22b, the pair of arc-shaped portions 34a and 34b of the ear portion 34 protruding outward in the width direction from the width direction boundary L1 of the plate member 30 and the cylindrical portion 1 are formed.
The outer peripheral portion 11 of 0 is joined, and the pair of arcuate portions 34a, 34b and the outer peripheral portion 11 of the cylindrical portion 10 are fixed by welding at this joint portion, and a pair of joint fixing portions 25, 26 are provided. In this embodiment, the plate member 30 has a deformed edge boundary L4 that connects the pair of longitudinal direction boundaries L2 and L3, and is bent at a right angle along the edge boundary L4 to form the pair of side wall portions 22a, A connection wall portion 22c is formed to connect the portions 22b. However, it is possible to change the shape of the plate material and omit the connection wall portion 22c. Moreover, as another embodiment, the number of side wall portions extending at right angles to the seat portion 21 may be one. In this case, it is sufficient that the plate member has only one ear. Further, the cylindrical portion 10 can be made elliptical.

As described above, according to this embodiment, the cylindrical portion 10 and the arm portion 20 are integrally machined from one punched plate material 30, and the outer peripheral portion 11 of the cylindrical portion 10 is processed.
And the arcuate portion 34 of the side wall portions 22a and 22b of the arm portion 20.
After forming the cylindrical member and the arm member as separate parts by joining and fixing the a and 34b,
The manufacturing process could be simplified compared to the method of welding both. In addition, since the cylindrical portion 10 and the arm portion 20 are integrated, supporting members at the time of welding can reduce the number of plate materials to be used, and the product cost can be made lower than in the past.
The weight of the anti-vibration rubber bracket can be reduced.

In the anti-vibration rubber bracket thus formed, a rubber bush member (not shown) is press-fitted into the hole 12 of the cylindrical portion 10, and the inner tubular metal fitting of the rubber bush member is attached to the engine (or the vehicle body). By fixing the arm portion 20 to the vehicle body (or engine), transmission of engine vibration to the vehicle body is mitigated.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a vibration isolation rubber bracket according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing the anti-vibration rubber bracket.

FIG. 3 is a plan view schematically showing the anti-vibration rubber bracket.

FIG. 4 is a plan view schematically showing a plate member formed by a punching process which is a manufacturing process of the vibration isolating rubber bracket.

FIG. 5 is a plan view schematically showing a plate member including an arm portion obtained by subjecting the plate member to bending and drawing.

FIG. 6 is a front view schematically showing a vibration isolation rubber bracket according to a conventional example.

FIG. 7 is a plan view schematically showing the deformed plate and the arm member to which a bending drawing process is applied, which is a manufacturing process of the arm member that constitutes the vibration isolating rubber bracket.

[Explanation of symbols]

10 ... Cylindrical part, 10a ... 1st bending part, 20 ... Arm part, 21 ... Seat part, 21a, 21b ... Attachment hole, 22
a, 22b ... Side wall part, 23, 24 ... Second bent part, 25, 26 ... Joining and fixing part, 30 ... Plate material, 31 ... Tail part, 31a ... Tail end, 32 ... Head part, 33 ... Base part, 34 ...
Ear portion, 34a, 34b ... Arc-shaped portion, L1 ... Width boundary, L
2, L3 ... Longitudinal boundary.

Claims (2)

[Claims] 1. A vibration-proof rubber bracket for attaching a vibration-proof rubber to a supporting portion or a supported portion, comprising: a belt-shaped tail portion formed on one end side in the longitudinal direction and the tail portion formed on the other end side. A single metal plate member having a wider head portion, the metal plate member extending in the width direction separating the tail portion and the head portion, and a substantially tail portion on the head portion. A longitudinal boundary extending in the longitudinal direction from the width end of the head, an ear portion protruding from the longitudinal boundary to the head portion, and an arcuate portion protruding outward in the width direction from the width boundary to the ear portion. A tubular portion having a hole into which the anti-vibration rubber formed by bending and deforming the strip-shaped tail portion into a tubular shape and abutting or approaching the tail end to the width direction boundary, A first bent portion formed along the widthwise boundary and formed along the longitudinal boundary A second bent portion, a seat portion that is bent so that the head portion extends outward from the cylindrical portion, and extends substantially flat from the first bent portion, and the second folded portion. A side wall portion formed by the ear portion that is bent from the bent portion and extends in a direction substantially perpendicular to the seat portion, and by forming the side wall portion, the arcuate portion and the outer peripheral portion of the cylindrical portion. An anti-vibration rubber bracket, characterized in that an arm portion having a joining and fixing portion that is joined and fixed is integrally formed. 2. A belt-shaped tail portion formed on one end side in the longitudinal direction and a head portion formed on the other end side so as to be wider than the tail portion, and the head portion extends from a width end of the tail portion. One metal plate member having an ear portion protruding from a longitudinal boundary extending in the direction and an arcuate portion protruding from a width boundary extending in the width direction that separates the tail portion from the head portion in the ear portion A step of forming by punching, and by bending and deforming the band-shaped tail portion into a tubular shape, the tail end is brought into contact with or brought close to the width direction boundary, and a tubular portion having a hole into which a vibration-proof rubber is inserted is formed. A step of forming, and a first bent portion is provided by bending the head along the boundary in the width direction, and the head is projected outward from the cylindrical portion from the first bent portion. And by bending the head along the longitudinal boundary A seat portion provided with two bent portions, the seat portion extending substantially flat from the first bent portion, and the seat portion bent from the second bent portion and extending substantially at right angles to the seat portion. A step of forming a side wall portion obtained from an ear portion, and a step of joining the arcuate portion and an outer peripheral portion of the cylindrical portion to form a joint fixing portion, and forming an arm portion including the seat portion and the side wall portion. A method for manufacturing a bracket for vibration-proof rubber, comprising: