JPH08192442A - Resin bracket vibration proof device and production thereof - Google Patents

Abstract

PURPOSE: To inexpenslvely produce a resin bracket vibration proof device enabled in wt. reduction without functionally deteriorating the same. CONSTITUTION: An elastic vibration proof element 10 wherein an elastic post 16 is expanded from a rigid inner cylinder 14 and a ridid plate 18 having an outer periphery larger than the elastic post 16 is bonded to the external end of the elastic post 16 is inserted in a resin injection mold of which the injection space has the shape of a bracket enclosing the rigid plate 18 from both surfaces thereof to include the elastic vibration proof element 10 and a resin is injected into the injection space to be molded into the bracket 12 of the elastic vibration proof element 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator provided between a vibrating body and a fixing member for the purpose of vibration isolation. Among them, a resin bracket vibration isolator whose bracket is made of resin. And a resin bracket vibration proof device manufactured by the manufacturing method.

[0002]

2. Description of the Related Art In recent years, it has been required to reduce the weight and cost of this type of vibration damping device. In particular,
This tendency is strong in anti-vibration devices used in automobiles. For this reason, it has been proposed to replace an iron bracket that has been conventionally used with a resin bracket. These methods are roughly classified into those in which resin is injected around the rubber vibration isolator and those in which rubber is injected inside the resin bracket.

As the former one, a normal shape rubber vibration isolator having a rigid body and an inner and outer cylinder is inserted into a resin injection mold, and the resin is injected into a mold space to form a bracket ( It can be seen that there are JP-A-4-054343) and one in which a rubber vibration isolator without an outer cylinder is inserted into a mold (JP-A-6-234134). Further, the latter is one in which a resin bracket is molded in a mold and a metal pipe to be an inner cylinder is set therein and a rubber material is injected therein (Japanese Patent Laid-Open No. 6-173990). is there.

[0004]

However, in the first example of the former, since the bracket is simply replaced by the resin and the rubber vibration isolator has a normal shape with the inner and outer cylinders, it is very lightweight. It has not been planned. The second example is intended to bond the vulcanized rubber and the resin in the softened state, but there are problems in the process such as the bonding technique.

On the other hand, in the latter case, there is a problem of internal stress due to shrinkage of the injected rubber after vulcanization adhesion, and there is a concern that the durability may be adversely affected. The present invention solves such a problem, and embodies a method for manufacturing a resin bracket vibration isolator that does not have any of the above drawbacks and a resin bracket vibration isolator manufactured by the method. .

[0006]

Under the above problems, according to the present invention, an elastic column is extended from a rigid body cylinder, and a rigid plate having an outer circumference larger than that of the elastic column is bonded to the outer end of the elastic column. Insert the elastic vibration absorber into the resin injection mold that encloses the rigid plate from the front and back and has the shape of the bracket that houses the elastic vibration absorber as the injection space, and injects the resin into the injection space to inject the elastic vibration absorber. The present invention provides a method for manufacturing a resin bracket vibration isolator, which is characterized by being molded into the bracket, and a resin bracket vibration isolator manufactured by this manufacturing method.

[0007]

The present invention adopts the above means, that is,
Since the rigid plate has a larger outer circumference than the elastic column, the injected resin wraps the front and back sides of the rigid plate, and the elastic vibration isolator and the resin bracket are firmly integrated. This means that the elastic vibration isolator does not come out of the resin bracket without relying on an adhesive means or the like. Further, since a small rigid plate is sufficient for the member corresponding to the outer cylinder of the conventional product, it is possible to sufficiently reduce the weight.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a partial sectional side view of a resin bracket vibration isolator according to the present invention, and FIG. 2 is a partial sectional plan view of the same.
The resin bracket vibration isolator according to the present invention is an elastic vibration isolator 1.
0 is integrally loaded in the resin bracket 12.

Of these, the elastic vibration isolator 10 has an elastic column 16 made of a rubber or an elastic resin that extends laterally from a rigid body cylinder 14 made of a rigid body such as metal, and has metal or hard material at its outer end. A rigid plate 18 made of resin or the like is bonded by vulcanization bonding or an adhesive. In addition, the elastic column 16 is the rigid cylinder 1.
4 is a stopper portion 16a that bulges like a block around
have. In this example, the outer periphery of the outer end of the elastic column 16 is made larger than that of the other part.
This is because it is useful for ensuring a sufficient adhesion area with and, and it is not always necessary to do so.

The resin bracket 12 is an elastic vibration isolator 10.
It has a shape in which a cylindrical portion 20 that fits in and a base 22 that extends to the left and right of the lower portion of the cylindrical portion 20 and supports this are integrally formed. The base 22 is formed with a hole 22a through which a fixing bolt or the like passes.

FIG. 4 is a cross-sectional perspective view showing a state in which the elastic column 16 is cut. In this case, the rigid plate 18 has a larger outer circumference than the elastic column 16 and the resin bracket 12 is made of. It is formed in a curved shape that is curved inward so as to fit well in the cylindrical portion 20. Although the outer circumference of the rigid plate 18 in this example is continuously enlarged over the entire circumference of the elastic column 16, only a part thereof may be enlarged discontinuously.

A completed product is one in which the above-described elastic vibration isolator 10 is integrally mounted in the cylindrical portion 20 of the resin bracket 12. However, at this time, in order to increase the durability by adjusting the spring constant of the elastic column 16, the elastic column 16 and the cylindrical portion 2 are
Two upper and lower penetrating portions 24 are secured between 0 and 0.

Next, a method of manufacturing the above resin bracket vibration damping device will be described. FIG. 3 is an explanatory view showing the process, but in short, for resin injection in which the shape of the resin bracket 12 molded so as to wrap the rigid plate 18 from the front and back to house the elastic vibration isolator 10 is the injection space 26. Mold 2
8 is used. Specifically, the mold 2 that is properly divided
The elastic vibration-proof body 10 is inserted into the inside 8 and the resin is injected into the injection space 26 formed around the elastic vibration-proof body 10 (30 is a mold for forming the penetrating portion 24).

After the above operation, when the resin is injected into the injection space 26 (the die 28 is provided with an appropriate injection path), the resin is cured and the elastic vibration isolator 10 is integrally formed. It is molded into an internally mounted bracket of a predetermined shape. At this time, the resin also wraps around the rear side of the portion where the rigid plate 18 projects from the elastic column 16, so that the connection between the two becomes stronger and the elastic vibration isolator 10 is prevented from coming off.

The above description is an example of the present invention, and the present invention is not limited to this. For example, the elastic column 16 in the preceding example is shown as one shape extending to the left and right of the rigid cylinder 14, but there are various other shapes such as an eight shape, a T shape, and an X shape. In addition, if a pressing piece or the like for contacting the outer surface of the rigid plate 18 with the mold 28 to compress the elastic column 16 is formed,
It is also possible to apply an appropriate preload to the elastic column 16 before injecting the resin.

[0016]

As described above, the present invention is as described above, that is, the outer circumference of the rigid plate adhered to the outer end of the elastic column is larger than the outer circumference of the elastic column. When the bracket is molded with the resin, the resin wraps the front and back surfaces of the rigid plate, and the two are firmly integrated, so that it is possible to prevent them from coming off without using adhesive means or the like.

Further, since the rigid plate provided on the elastic vibration isolator is much smaller than that of the conventional outer cylinder, the weight can be sufficiently reduced. Further, it is also superior in strength as compared with the elastic column alone without this kind of member.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of a resin bracket vibration isolator showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional plan view of a resin bracket vibration isolator showing an embodiment of the present invention.

FIG. 3 is an explanatory view of the method for manufacturing the resin bracket vibration isolation device showing the embodiment of the present invention.

FIG. 4 is a sectional perspective view of a rubber column showing an embodiment of the present invention.

[Explanation of symbols]

 10 Elastic Vibration Isolator 12 Resin Bracket 14 Rigid Body Cylinder 16 Elastic Column 18 Rigid Body Plate 26 Injection Space 28 Resin Injection Mold

Claims (2)

[Claims] 1. An elastic vibration isolator in which an elastic column is extended from a rigid cylinder, and a rigid plate having an outer circumference larger than that of the elastic column is adhered to the outer end of the elastic column so that the rigid plate is wrapped from the front and back sides to provide elasticity A resin bracket vibration proof that is characterized in that it is inserted into a resin injection mold that has the shape of a bracket that houses a vibration proof body as an injection space, and the resin is injected into the injection space and molded into a bracket of an elastic vibration proof body. Device manufacturing method. 2. A resin bracket vibration isolation device manufactured by the manufacturing method according to claim 1.