JP2559259Y2 - Anti-vibration equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a vibration isolator according to a vibration isolation technique.

[0002]

2. Description of the Related Art As shown in FIG. 3, a known vibration isolator connects an inner peripheral annular portion 2 and an outer peripheral annular portion 3 with a plurality of spokes 4, and the whole is made of a rubber-like elastic material. To form a single unit. In the figure, the spoke portions 4 are evenly distributed. FIG. 4 shows a state in which a pump 5 is supported as an example of use of the vibration isolator 1. In the figure, a pair of left and right vibration isolator 1 has an inner annular portion 2 fixed to the pump 5 side, and an outer peripheral portion. The side annular portion 3 is fixed to the bracket 6 side to elastically support the pump 5. The vibration input to the vibration isolator 1 is divided into a component that is input in the radial direction of the annular portions 2 and 3 and a component that is input in the circumferential direction of the annular portions 2 and 3. The spoke portion 4 is elastic according to the input direction. Deform.

[0003]

In the above-mentioned vibration isolator, there is a case where it is desired to increase the rigidity in the circumferential direction while keeping the rigidity in the radial direction unchanged. When the rigidity in the direction is increased, the rigidity in the radial direction is increased at the same time. In addition, real application sho 63-
Micro of No. 26673 (No. 1-132840)
Like an anti-vibration device described on the film,
By providing a plurality of C-shaped through-holes,
When a stopper (a part surrounded by a C-shaped through hole) is provided
Has the following disadvantages. That is, the input vibration
Has both a radial component and a circumferential component.
In some cases, the circumferential side of the spoke and the circle of the stopper
The distance from the circumferential side is the same no matter where
Of the spokes in the circumferential direction
Contact the entire circumferential side surface of the
In some cases, the through holes temporarily disappear. Therefore
There is no escape for the elastic deformation of the spokes
Only circumferential stiffness due to practically limited elastic deformation
However, there is a disadvantage that the rigidity in the radial direction is increased.

[0004]

SUMMARY OF THE INVENTION In view of the above, the present invention has been devised in order to solve the above-mentioned problems of the prior art. In a vibration isolator made of a rubber-like elastic material in which a part and an annular part on the outer peripheral side are connected by a plurality of spoke parts,
A stopper is provided between the spoke portions of the book so that a side surface of the spoke portion contacts when the spoke portion is elastically deformed.
Contact of the stopper with the side surface of the spoke portion
A concave escape space is provided on the inner peripheral side of the portion. S
The topper has a substantially T-shape when viewed from the axial direction.
That is, from the annular portion on the inner peripheral side
Extending radial part (part corresponding to vertical bar of T)
Extending from the outer peripheral end of the radial portion to both sides in the circumferential direction
Having a circumferential portion (a portion corresponding to a horizontal bar in the shape of T).
On both sides in the circumferential direction of the radial portion and on the inner circumferential side of the circumferential portion.
, A recessed escape space is provided.

[0005]

When the vibration is input to the vibration isolator and the inner annular portion and the outer annular portion are angularly displaced in the circumferential direction, the spoke portions are elastically deformed so as to be inclined, and the inclination angle becomes a predetermined angle. Then, the side surface of the spoke contacts the stopper. Accordingly, it is possible to suppress elastic deformation of the spoke portion and increase rigidity in the circumferential direction. The stopper is provided between two spokes arranged in the circumferential direction so that the side surfaces of the spokes are in contact with each other, and therefore does not exert a stopper effect on the radial component of the vibration. Ma
The inner circumference of the contact part of the stopper against the side surface of the spoke part
Input side vibration due to the concave relief
Has both a radial component and a circumferential component.
In some cases, the sides of the spokes may contact the stopper contact
While still touching, keep this
An escape space is left as space. Therefore, the spoke part
Fill this escape space for the radial component of the input vibration
This is because the elastic deformation
Prevent the radial spring constant of the spoke part from becoming high
It becomes possible.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

As shown in FIG. 1, an annular portion 2 on the inner peripheral side and an annular portion 3 on the outer peripheral side are connected by a plurality of spoke portions 4, and are provided between two spoke portions 4 arranged in the circumferential direction. A stopper 7 having a substantially T-shape as viewed from the axial direction is provided, and the entire vibration isolator is integrally formed of a rubber-like elastic material. axis
When viewed from the line direction, the substantially T-shaped stopper 7 has an inner annular shape.
Radial portion extending radially outward from portion 2 (T-shaped
A portion corresponding to a vertical bar) 7a and the outer periphery of the radial portion 7a
Circumferential portion extending from the end to both sides in the circumferential direction (T-shaped
7b), and a radial portion
Both end surfaces in the circumferential direction of 7b are contact portions 7c, respectively.
Inner side of the contact portion 7c, that is, the circumferential direction of the radial portion 7a
Recesses on both sides on the inner side of the circumferential portion 7b.
An escape space 7d is provided. In the figure, spoke part 4
The stopper 7 and the stopper 7 are respectively arranged at equal intervals.

When vibration is input to the vibration isolator having the above structure and the inner annular portion 2 and the outer annular portion 3 are angularly displaced in the circumferential direction, the spoke portion 4 is inclined as shown in FIG. When the inclination angle becomes a predetermined angle, the side surface 4 a of the spoke portion 4 comes into contact with the stopper 7. Accordingly, it is possible to suppress elastic deformation of the spoke portion 4 and increase rigidity in the circumferential direction. The stopper 7 is provided between two spoke portions 4 arranged in the circumferential direction so that the side surface 4a of the spoke portion 4 is in contact with the spoke portion 4. Therefore, the stopper 7 acts as a stopper against radial components of vibration. Do not play.
Since the substantially T-shaped stopper 7 has a small contact area with the spoke portion 4 and has a relief 7d on the inner peripheral side of the contact portion 7c , the vibration has both a circumferential component and a radial component. In this case, it is effective to increase only the circumferential rigidity.

[0009]

[Effects of the Invention] The anti-vibration device of the present invention is as described above.
A stopper is provided between two spoke portions arranged in the circumferential direction so that the side surface of the spoke portion comes into contact with the spoke portion, so that only the rigidity in the circumferential direction can be increased without changing the rigidity in the radial direction. Also, as described above,
A concave relief area is provided on the inner peripheral side of the contact
Of the input vibration, the radial component and the circumferential
If it has both components, the side of the spoke part
Make sure the spokes are still in contact with the
This escape space is left as a space between the part and the stopper.
You. Therefore, the spoke part has no effect on the radial component of the input vibration.
And then elastically deform to fill this escape space
This allows the radial springs on the spokes to be tolerated
It is possible to prevent the constant from increasing. But
Therefore, the input vibration reduces both the radial component and the circumferential component.
Stiffness in the radial direction of the spokes, if any
Only the circumferential stiffness without increasing the
Wear.

[Brief description of the drawings]

FIG. 1 is a half-cut front view of an anti-vibration device according to an embodiment of the present invention.

FIG. 2 is a half cut front view showing an operation state of the vibration isolator.

FIG. 3 is a front view of a half-cut of a vibration isolator according to a conventional example.

FIG. 4 is an explanatory view showing a usage example of a vibration isolator.

[Description of Signs] 1 Anti-vibration device 2 Inner peripheral annular portion 3 Outer peripheral annular portion 4 Spoke portion 4a Side surface 5 Pump 6 Bracket 7 Stopper 7a Radial portion 7b Circumferential portion 7c Contact portion 7d Escape area

Claims (1)

(57) [Scope of request for utility model registration] 1. A inner side of the annular portion (2) and the outer peripheral side of the annular portion
(3) and the rubber-like elastic material made of anti blowfish connected by a plurality of spokes (4), between the spokes of the two aligned in the circumferential direction (4), the spokes (4 ) is provided a stop (7) which sides (4a) is in contact of the spokes (4) when elastically deformed, the side of the spokes (4)
The contact portion (7) of the stopper (7) with respect to the surface (4a)
A vibration isolator characterized by providing a recessed relief area (7d) on the inner peripheral side of c) .