JP3891694B2 - Vibration isolator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration isolator that supports an engine.
[0002]
[Prior art]
As this type of vibration isolator, for example, as shown in FIG. 3, a (anti-vibration rubber) main body 101 of the vibration isolator fixed to the vehicle body 100, a pin 103 protruding from the engine 102 side and fixed to the main body 101 side, The one with is known. The vibration isolator is provided with a dynamic damper (for suppressing resonance of the pin 103) 104 that elastically supports a mass on the base end side (engine 102 side) of the pin 103, and at the tip side (vehicle body side) of the pin 103 ) Is provided with a stopper metal fitting (preventing the engine 102 from jumping forward by inertial force in the event of a collision).
[0003]
[Problems to be solved by the invention]
In the vibration isolator having such a configuration, the dynamic damper and the stopper fitting are separately installed on the pins, which causes inconveniences such as an increase in the number of assembling steps and an increase in cost.
[0004]
Therefore, in view of the above-described circumstances, an object of the present invention is to provide a vibration isolator that can reduce the number of assembling steps and the associated cost.
[0005]
[Means for Solving the Problems]
That is, according to the first aspect of the present invention, in the vibration isolator that supports the engine, the relative displacement of the inner cylinder is regulated at the tip of the pin that protrudes from the engine side and is fixed to the inner cylinder of the vibration isolator main body. A fixed damper is attached, and a mass is elastically supported by rubber vulcanized and bonded to the fixed bracket to form a dynamic damper. The fixed bracket is displaced along the axial direction of the inner cylinder to The fixing bracket is provided with a U-shaped notch, and the notch is opened upward, and a mass is disposed in the notch via a spring member . Is.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a vibration isolator according to the present invention. This vibration isolator is applied to an engine mount, and includes a main body 1 of the vibration isolator, a pin 3 protruding from a bracket 2 on the engine side, The fixing member 4 is provided on the tip end side of the pin 3, a spring member 5 made of rubber, and a mass 6 fixed (vulcanized and bonded) to the fixing member 4 via the spring member 5.
[0007]
The main body 1 has an attachment piece 11 fixed to the body side of the vehicle body, an outer cylinder 12 provided integrally with the attachment piece 11, and an elastic body (straightening 13A) made of rubber inserted and fixed to the outer cylinder 12. ) 13 and an inner cylinder 14 fixed to the center side of the elastic body 13. Further, a pin 3 is inserted through the inner cylinder 14 through the elastic body 13 and is connected to the engine side by the pin 3. The configuration of the main body is not particularly limited to that of this embodiment, and may be a liquid-containing one, for example.
[0008]
The fixture 4 is formed by an extrusion method using a lightweight aluminum material, and has a substantially U-shaped notch 4A, and a spring member 5 is vulcanized and bonded to the notch 4A. Further, since the fixing member 4 can be brought into contact with the outer cylinder 12 (or the body to which the main body 1 is attached) of the main body 1, the relative displacement of the inner cylinder, that is, the pin 3 is restricted. The fixing bracket 4 is firmly secured to the tip end side of the pin 3 with a screw, and functions as a stopper bracket for preventing the engine from jumping out in the event of a collision. In the fixing member of this embodiment, it can be brought into contact with the outer cylinder of the main body, but may be brought into contact with the inner cylinder side, or may be brought into contact with any of the body side.
[0009]
The mass 6 is covered with a rubber spring member 5, and is fixed (vulcanized and bonded) to the fixture 4 through the spring member 5. Thereby, the mass 6 and the spring member 5 function as a dynamic damper. In this dynamic damper manufacturing method, a fixing metal fitting and a mass are set in a predetermined mold (the mass is supported and supported by four support members and set in a floating state). The rubber material is injected into vulcanized and molded.
[0010]
Therefore, according to this embodiment, when vibration is transmitted from the engine, the main body 1 of the vibration isolator suppresses vibration transmission to the body side. At that time, when a large input vibration is transmitted to the main body 1, the fixing bracket 4 functions as a stopper, restricting excessive displacement of the pin 3 and preventing the main body 1 from being damaged. That is, the fixing bracket 4 functions as a stopper to prevent the engine from popping out when the engine tries to jump forward by inertia force at the time of a collision.
[0011]
Even when the fixing member is in contact with the outer cylinder 12, the dynamic damper can suppress the resonance operation of the pin 3 itself. That is, since the stopper fitting 105 and the dynamic damper fixing fitting are made of lightweight extruded aluminum, the resonance point of the pin 3 itself is also on the high frequency side, so that the influence on the sound vibration is reduced.
[0012]
In addition, since the fixing bracket is made of lightweight aluminum formed by extrusion molding, the irregular shape can be manufactured lightly integrally, and the strength as a stopper can be sufficiently secured.
[0013]
【The invention's effect】
As described above, according to the present invention, in the vibration isolator that supports the engine, the relative displacement of the inner cylinder is regulated at the tip of the pin that protrudes from the engine side and is fixed to the inner cylinder of the vibration isolator main body. A vibration damper is attached by attaching a fixing bracket to the fixing bracket, elastically supporting the mass with rubber vulcanized and bonded to the fixing bracket to constitute a dynamic damper, and displacing the fixing bracket along the axial direction of the inner cylinder. The fixing bracket is provided with a U-shaped notch, and the notch opens upward, and a mass is arranged in the notch via a spring member. In other words, the stopper and the dynamic damper are combined and integrated in one place, so that the number of manufacturing steps can be reduced and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a vibration isolator according to the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a schematic configuration diagram showing a conventional vibration isolator.
[Explanation of symbols]
1 (Anti-Vibration Device) Main Body 14 Inner Tube 3 Pin 4 Fixing Bracket 5 Spring Member (Rubber)
6 trout

Claims (2)

In the vibration isolator that supports the engine,
At the tip of the pin that protrudes from the engine side and is fixed to the inner cylinder of the vibration isolator main body, a fixing bracket for restricting the relative displacement of the inner cylinder is attached,
The mass is elastically supported by rubber that is vulcanized and bonded to this fixing bracket to form a dynamic damper,
The fixing bracket is configured to be displaced along the axial direction of the inner cylinder so as to contact the outer cylinder of the vibration isolator body ,
The fixing bracket includes a U-shaped notch, the notch opens upward, and a mass is disposed in the notch via a spring member . 2. The vibration isolator according to claim 1, wherein a side surface of the fixing bracket on the vibration isolator main body side is located closer to the vibration isolator side than a side surface of the mass.

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