JP2001241505A - Retaining structure and bonding method of vibration isolation bushing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retaining structure and a fastening way of a vibration isolation bushing with an enough bonding strength without eccentricity or misalignment of an axis. SOLUTION: The retaining structure of the press fit type vibration isolation bushing comprises the press fit type vibration isolation bushing made by an inside pipe 11 and a rubber elastic body 12 fixed to the outside circle of the pipe 11, a retaining part 17 holding the bushing, and a bond layer 15 equipped between the retaining part 17 and the elastic body 12. Friction or viscous resistance of the relative displacement, which generates between the holding part 17 and the elastic body 12, makes the bond layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolating bush holding structure and a method of bonding the vibration isolating bush, and more particularly, to a method of adhering a press-fit type vibration isolating bush used for vehicle parts relatively easily. is there.

[0002]

2. Description of the Related Art Conventionally, there is known a press-fit type anti-vibration bush in which an outer cylinder is omitted from a normal inner / outer cylindrical bush to reduce costs and reduce torsion spring characteristics. Such a press-fit type anti-vibration bush has a structure in which a cylindrical rubber-like elastic body is vulcanized and adhered to the outer periphery of an inner cylinder. Pre-compression is added to ensure high durability fatigue.

[0003]

In such a press-fit type anti-vibration bush, since the rubber-like elastic body and the holding member are not adhered, the rubber-like elastic body is vulcanized and bonded to the inner cylinder and the outer cylinder. There is a problem that the durability is inferior to the cylindrical type. In addition, there is a problem that the press-fit surface slips at a high torsion angle to generate abnormal noise, and a problem that the press-fit surface is worn and damaged. Further, there is a problem that when a high squeezing force is applied, soil or the like enters the press-fitting surface and the rubber-like elastic body is easily damaged.

Therefore, a structure is known in which the rubber-like elastic body and the holding member are bonded with an adhesive to perform vulcanization bonding. JP-A-5-287087 discloses a method of bonding a plurality of adhesive layers and activating the rubber surface as a method of bonding without applying a resin-based cationic electrodeposition coating.

[0005] However, any of these methods requires an extra step for bonding, which causes a problem that the number of steps is increased and the cost is increased.

In view of such circumstances, an object of the present invention is to provide a vibration-proof bush holding structure and a method of bonding a vibration-proof bush that can be bonded with sufficient bonding strength and that are free from eccentricity and axial misalignment.

[0007]

According to a first aspect of the present invention, there is provided a press-fit type anti-vibration bush comprising an inner cylinder and a rubber-like elastic body fixed to the outer periphery of the inner cylinder. In a holding structure for a press-fit type anti-vibration bush, comprising a holding member that holds the anti-vibration bush, and an adhesive layer provided between the holding member and the rubber-like elastic body, the adhesive layer includes: The vibration-proof bush holding structure is characterized in that friction or viscous resistance is generated by relative movement between the rubber-like elastic body and the holding member.

[0008] A second aspect of the present invention is a step of press-fitting a press-fit type vibration-isolating bush having a rubber-like elastic body fixed to the outer periphery of an inner cylinder into a holding member via an adhesive layer. A step of relatively moving the holding member and generating a frictional or shearing force at a boundary surface between the two.

According to a third aspect of the present invention, in the second aspect, the adhesive layer is formed by heat-melting applied to at least one of an outer peripheral surface of the rubber-like elastic body and an inner peripheral surface of the holding member in advance. A method for mounting a vibration-isolating bush, comprising a mold adhesive.

In the present invention, the outer peripheral surface of the rubber-like elastic body does not need to be subjected to surface treatment, but at least one of the outer peripheral surface of the rubber-like elastic body and the inner peripheral surface of the holding member is subjected to surface treatment. Is also good.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments.

FIGS. 1 and 2 show a vibration isolating bush holding structure according to an embodiment of the present invention. FIG. 1 is a longitudinal sectional view and a transverse sectional view, and FIG. 2 is a perspective view showing an assembled state.

As shown in both figures, the press-fit type anti-vibration bush 1
No. 0 has a structure in which a rubber-like elastic body 12 is vulcanized and bonded to the outer peripheral surface of the inner cylinder 11. Such a press-fit type anti-vibration bush 10
While the adhesive layer 15 is formed on the outer peripheral surface of the rubber-like elastic body 12, it is pressed into the through hole 17 a of the holding member 17 and is held. Or by rotating in one direction to generate frictional or viscous drag. That is, the relative movement between the holding member 17 and the rubber-like elastic body 12 causes friction or shear force to be generated at the interface between the two, thereby heating the surfaces of the adhesive layer 15 and the rubber-like elastic body 12. . As a result, the surface of the rubber-like elastic body 12 is activated, and excess adhesive is squeezed out. Also, there is an effect that the eccentricity and the axis deviation at the time of press-fitting are reduced.

Here, the holding member 17 and the rubber-like elastic body 12
The relative movement is preferably mainly a rotational movement, but the movement in the axial direction may be added to this movement, or only the movement in the axial direction may be performed. Further, the rotational movement and the axial movement may be any as long as the above-mentioned effects are exerted, but a reciprocating movement is preferable.

Since the surface of the rubber-like elastic body 12 is activated by the friction or shear force due to such relative movement,
Since it is not necessary to apply a surface treatment to the surface of the rubber-like elastic body 12 in advance, it is possible to save time and effort for the surface treatment. However, at least one of the surface of the rubber-like elastic body 12 and the inner peripheral surface of the holding member 17 may be subjected to a mechanical or chemical surface treatment for improving adhesiveness.

Further, the adhesive layer 1 is formed by friction or shear force.
5 is heated, but the effect depends on what is used as the adhesive. That is, when a one-part or two-part cold-setting adhesive such as an isocyanate-based adhesive or an epoxy-based adhesive is used as the adhesive, the adhesive layer 15 becomes uniform and the excess adhesive is used. Has the effect of being squeezed out, and when a thermosetting adhesive is used as the adhesive, it can be cured by friction or shearing force in addition to the above-described basic effects, and heat treatment is performed. The effect that there is no need is exhibited. In addition, when a hot-melt adhesive such as an olefin-based adhesive, that is, a hot-melt adhesive is used, since the adhesive layer is hardened at the time of press-fitting, it is easy to press-fit. Thus, the effect of melting and uniformly bonding the two as a uniform layer is exhibited.

[0017]

As described above, according to the present invention,
It is possible to provide an anti-vibration bush holding structure and a method of bonding an anti-vibration bush that can be bonded with a sufficient bonding strength and that are free from eccentricity and axial deviation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view and a transverse sectional view of an anti-vibration bush holding structure of the present invention.

FIG. 2 is a perspective view showing an assembled state of the vibration-proof bush holding structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Press-fit type anti-vibration bush 11 Inner cylinder 12 Rubber-like elastic body 15 Adhesive layer 17 Holding member 17a Through-hole

Continued on front page F-term (reference) 3J048 AA01 AC01 BA04 BA05 BA08 BA19 BD01 BD04 BD07 DA04 EA01 EA07 EA15 3J059 AD01 BA42 BC06 BD01 BD06 CA14 CB09 EA09 EA13 EA14 GA01 4F211 AE07 AH14 TA03 TC07 TD11 TD16 TN20

Claims (3)

[Claims] 1. A press-fit type anti-vibration bush comprising an inner cylinder, a rubber-like elastic body fixed to an outer periphery of the inner cylinder, a holding member for holding the anti-vibration bush, the holding member and the rubber member. In a holding structure of a press-fit anti-vibration bush having an adhesive layer provided between the elastic member and the elastic member, the adhesive layer is rubbed by relative movement between the rubber-like elastic member and the holding member or A vibration isolating bush holding structure characterized by generating viscous resistance. 2. A step of press-fitting a press-fit type vibration-isolating bush having a rubber-like elastic body fixed to an outer periphery of an inner cylinder into a holding member via an adhesive layer, and the rubber-like elastic body and the holding member are relatively positioned. And generating a frictional or shearing force at the interface between the two. 3. The adhesive layer according to claim 2, wherein the adhesive layer is made of a hot-melt adhesive applied to at least one of an outer peripheral surface of the rubber-like elastic body and an inner peripheral surface of the holding member. The method of bonding the anti-vibration bush.