JP7219171B2 - Stopper member - Google Patents

Description

The present invention relates to stopper members.

Conventionally, an outer cylinder attached to one of the vibration generating part and the vibration receiving part, an inner cylinder attached to the other, and a main body rubber connecting the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder and an elastically deformable ring-shaped stopper member disposed between the outer cylinder of the anti-vibration bushing and the other of the vibration generating portion and the vibration receiving portion.
As a stopper member of this type, a configuration is known in which a reinforcing metal fitting is embedded and an inner cylinder of a vibration-isolating bush is fitted inside, as disclosed in Patent Document 1 below.

JP 2018-71749 A

However, in the conventional art, when vibration is input, the inner peripheral surface of the stopper member is strongly pressed against the outer peripheral surface of the inner cylinder, and there is a problem that the inner peripheral surface of the stopper member is easily worn.

SUMMARY OF THE INVENTION The present invention has been made in consideration of such circumstances. It is an object of the present invention to provide a stopper member capable of achieving

In order to solve the above problems and achieve such objects, the stopper member of the present invention comprises an outer cylinder attached to one of the vibration generating portion and the vibration receiving portion, and an inner cylinder attached to the other. and the outer cylinder of the anti-vibration bushing provided with a main body rubber that connects the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder, and the other one of the vibration generating portion and the vibration receiving portion, an elastically deformable annular stopper member disposed between a fitting cylinder fitted to the inner cylinder and having an inner peripheral metal fitting embedded therein; and an outer peripheral portion in which an outer peripheral metal fitting is embedded; A stopper projection is provided to protrude toward the outer cylinder side in the axial direction, and the inner peripheral metal fitting and the outer peripheral metal fitting are separate from each other.

According to this aspect of the invention, since the inner peripheral fitting is embedded in the fitting tube that is fitted onto the inner tube, the stopper member can be firmly fixed to the inner tube.
Since a stopper projection protruding toward the outer cylinder side is disposed on the outer peripheral portion, vibration is input, and either one of the vibration generating portion and the vibration receiving portion, or the outer cylinder of the anti-vibration bush, When it collides with the stopper projection, this vibration can be absorbed by the stopper projection and can be suppressed from propagating to the vibration receiving portion.
Since the outer peripheral metal fitting is embedded in the outer peripheral portion where the stopper projections are arranged, it is possible to easily and accurately tune the characteristics of the stopper member with respect to input vibration.
Since the inner peripheral metal fitting and the outer peripheral metal fitting are separate from each other and the metal fitting is not embedded in the annular connecting portion connecting the fitting tube and the outer peripheral portion, the weight of the stopper member can be reduced.
Since the connecting part is provided with no embedded metal fittings, vibration is input and either one of the vibration generating part and the vibration receiving part or the outer cylinder of the anti-vibration bush collides with the stopper member. The force can be reliably absorbed by elastically deforming not only the stopper protrusion but also the connecting portion, and it is possible to suppress the inner peripheral surface of the fitting cylinder from being strongly pressed against the outer peripheral surface of the inner cylinder. can.

Here, an axial size of the connecting portion may be smaller than an axial size of each of the fitting tube and the outer peripheral portion.

In this case, since the axial size of the connecting portion is smaller than the axial size of the fitting tube and the outer peripheral portion, the connecting portion is reliably elastically deformed when vibration is input as described above. As a result, it is possible to reliably prevent the inner peripheral surface of the fitting cylinder from being strongly pressed against the outer peripheral surface of the inner cylinder.

In addition, the inner peripheral metal fitting may be formed in a tubular shape, and may have a rectangular shape that is long in the axial direction and short in the radial direction when viewed in longitudinal section along the axial direction.

In this case, the inner peripheral metal fitting is formed in a cylindrical shape, and has a rectangular shape that is long in the axial direction and short in the radial direction when viewed in longitudinal section along the axial direction. can be firmly fixed to the

Further, the inner peripheral surface of the fitting cylinder has a contact portion that contacts the outer peripheral surface of the inner cylinder and a non-contact portion that is spaced radially outward from the outer peripheral surface of the inner cylinder. may be arranged alternately.

In this case, the inner peripheral surface of the fitting cylinder alternates in the circumferential direction with a contact portion in contact with the outer peripheral surface of the inner cylinder and a non-contact portion spaced radially outward from the outer peripheral surface of the inner cylinder. Therefore, when the stopper member is arranged between the outer cylinder of the anti-vibration bushing and the other one of the vibration generating part and the vibration receiving part, the fitting cylinder The inner cylinder of the anti-vibration bush can be easily fitted to the inside of the fitting cylinder with little resistance compared to the case where the inner peripheral surface of the bush is in contact with the outer peripheral surface of the inner cylinder over the entire circumference.

According to the present invention, it is possible to suppress the inner peripheral surface of the fitting cylinder from being strongly pressed against the outer peripheral surface of the inner cylinder when vibration is input, and to reduce the weight.

1 is a longitudinal sectional view of a vibration isolator having a stopper member shown as one embodiment according to the present invention; FIG. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1; It is a longitudinal section of a stopper member of a modification concerning the present invention.

A vibration isolator 10 having a stopper member 1 according to one embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG.
A vibration isolator 10 includes a stopper member 1 and a vibration isolator bush 11 .

The anti-vibration bushing 11 includes an outer cylinder 12 attached to one of the vibration generating portion M and the vibration receiving portion B, an inner cylinder 13 attached to the other, and an inner peripheral surface of the outer cylinder 12 and the inner cylinder 13. and a body rubber 14 connected to the outer peripheral surface.
For example, the vibration generator M may be a suspension member, the vibration receiver B may be a vehicle body frame, and the anti-vibration bushing 11 may be a member mount connecting the suspension member and the vehicle body frame.

In the illustrated example, an insertion recess B1 is formed in the vibration receiving portion B. A portion of the vibration generating portion M is inserted into this insertion recess B1, and a vibration isolating bush 11 is accommodated therein.
The outer cylinder 12 is connected to the vibration generating portion M by being fitted into a mounting hole formed in a portion of the vibration generating portion M that is inserted into the insertion recess B1. The inner cylinder 13 is inserted inside the outer cylinder 12 .

The outer cylinder 12 and the inner cylinder 13 are arranged coaxially with a common axis. Hereinafter, this common axis will be referred to as the central axis O, the direction intersecting the central axis O as seen from the axial direction along the central axis O will be referred to as the radial direction, and the direction that goes around the central axis O will be referred to as the circumferential direction.
A flange portion 12a is formed at one axial end portion of the outer cylinder 12, protruding radially outward and extending continuously over the entire circumference.
Hereinafter, the one end side in the axial direction will be referred to as the upper side, and the other end side in the axial direction will be referred to as the lower side.

The lower surface of the flange portion 12a is arranged on the periphery of the opening of the mounting hole on the upper surface of the vibration generating portion M. As shown in FIG.
A stopper rubber 15 is provided on the upper surface of the flange portion 12a. The stopper rubber 15 is formed integrally with the main rubber 14 . The stopper rubber 15 is formed in an annular shape continuously extending over the entire circumferential direction. The stopper rubber 15 may be intermittently scattered or extended in the circumferential direction.

The inner cylinder 13 protrudes from openings on both axial ends of the outer cylinder 12 . Axial opening edges of the inner cylinder 13 are formed on the lower surface of the upper wall b1 located at the upper end and the upper surface of the lower wall b2 located at the lower end of the wall surfaces defining the insertion recess B1 of the vibration receiving portion B. They are in contact with each other. The upper wall b1 and the lower wall b2 are formed with through-holes that open to the insertion recess B1, and a headed bolt 16 is integrally inserted into these through-holes and the inner side of the inner cylinder 13 from above. The inner cylinder 13 is connected to the vibration receiving portion B by screwing a nut 19 onto a portion of the bolt 16 protruding downward from the lower wall b2.
A stopper rubber 15 is in contact with or close to the lower surface of the upper wall b1.

The stopper member 1 is separated from the vibration isolating bushing 11, disposed between the outer cylinder 12 of the vibration isolating bushing 11 and the vibration receiving portion B, and formed in an elastically deformable annular shape. The stopper member 1 is arranged between the lower surface of the vibration generating portion M and the upper surface of the lower wall b2 of the vibration receiving portion B. As shown in FIG. The stopper member 1 is arranged on the upper surface of the lower wall b2 of the vibration receiving portion B. As shown in FIG. The stopper member 1 is arranged coaxially with the central axis O. As shown in FIG.
The stopper member 1 may be arranged between the upper surface of the vibration generating portion M and the lower surface of the upper wall b1 of the vibration receiving portion B, on the vibration generating portion M, or on the outer cylinder 12 .

Further, in this embodiment, the stopper member 1 includes a fitting tube 26 , an outer peripheral portion 28 , and a connecting portion 29 .

The fitting tube 26 is formed in a tubular shape and fitted onto the inner tube 13 . The lower end opening edge of the fitting cylinder 26 is in contact with the upper surface of the lower wall b2 of the vibration receiving portion B. As shown in FIG. The inner peripheral surface of the fitting cylinder 26 has a contact portion 21 that contacts the outer peripheral surface of the inner cylinder 13 and a non-contact portion 22 that is spaced radially outward from the outer peripheral surface of the inner cylinder 13. are arranged alternately.
The circumferential sizes of the contact portion 21 and the non-contact portion 22 are equal to each other. Three or more contact portions 21 and three or more non-contact portions 22 are provided. When viewed from the axial direction, the contact portion 21 has a sector shape, and the non-contact portion 22 has a rectangular shape. The shapes of the contact portion 21 and the non-contact portion 22 viewed from the axial direction may be changed as appropriate.
An inner metal fitting 25 is embedded in the fitting tube 26 . The inner peripheral metal fitting 25 is formed in a tubular shape continuously extending over the entire circumferential direction. The inner peripheral metal fitting 25 and the fitting tube 26 exhibit a rectangular shape that is long in the axial direction and short in the radial direction when viewed in longitudinal cross section along the axial direction. The inner peripheral fitting 25 and the fitting tube 26 extend straight over the entire length in the axial direction.

The outer peripheral portion 28 is arranged at a portion of the upper surface of the lower wall b2 of the vibration receiving portion B that faces the lower surface of the vibration generating portion M in the axial direction, and surrounds the fitting cylinder 26 from the outside in the radial direction.
A peripheral fitting 27 is embedded in the peripheral portion 28 . The outer peripheral metal fitting 27 is formed in an annular shape extending continuously over the entire area in the circumferential direction. The outer peripheral metal fitting 27 and the outer peripheral portion 28 exhibit a rectangular shape that is long in the radial direction and short in the axial direction when viewed in longitudinal cross section along the axial direction.

A stopper protrusion 24 is provided on the outer peripheral portion 28 and protrudes upward (toward the outer cylinder 12 in the axial direction). The stopper projection 24 is formed integrally with the outer peripheral portion 28 . The stopper protrusion 24 is formed in a curved rectangular parallelepiped shape extending along the circumferential direction. The stopper projection 24 has a radial size that decreases as it goes upward. The stopper projection 24 has a trapezoidal shape when viewed in longitudinal section along the axial direction.
A plurality of stopper projections 24 are arranged at intervals in the circumferential direction. Three or more stopper protrusions 24 are arranged at equal intervals in the circumferential direction. The stopper projection 24 is arranged over the entire radial area of the outer peripheral portion 28 .

In the illustrated example, the upper surface of the stopper projection 24 is in contact with the lower surface of the vibration generating portion M. As shown in FIG. Accordingly, when vibration is input, the vibration generating portion M collides with the stopper protrusion 24 of the stopper member 1 .
The upper surface of the stopper projection 24 may be separated downward from the lower surface of the vibration generating portion M, and the upper surface of the stopper projection 24 may be brought into contact with the outer cylinder 12 so that when vibration is input, the outer cylinder 12 may collide with the stopper projection 24 .

The connecting portion 29 connects the fitting tube 26 and the outer peripheral portion 28 and is formed in an annular shape. The axial size of the connecting portion 29 is smaller than the axial sizes of the fitting tube 26 and the outer peripheral portion 28 . The lower surface of the connecting portion 29 is separated upward from the upper surface of the lower wall b2 of the vibration receiving portion B. As shown in FIG. The connecting portion 29 is arranged at a position overlapping the inner peripheral metal fitting 25 and the outer peripheral metal fitting 27 in the radial direction.
The connecting portion 29 has a rectangular shape that is long in the radial direction and short in the axial direction in a vertical cross-sectional view along the axial direction. A radial width X of the connecting portion 29 is larger than a radial thickness Y of the fitting cylinder 26 and a radial width Z of the outer peripheral portion 28 . The inner peripheral metal fitting 25 and the outer peripheral metal fitting 27 are separate from each other, and no metal fitting is embedded in the connecting portion 29 .

As described above, according to the stopper member 1 according to the present embodiment, the inner peripheral metal fitting 25 is embedded in the fitting cylinder 26 externally fitted to the inner cylinder 13 . It can be firmly fixed.
Since the stopper projection 24 projecting upward is disposed on the outer peripheral portion 28, when vibration is input and the vibration generating portion M collides with the stopper projection 24, the vibration is absorbed by the stopper projection 24. It is possible to suppress the vibration from being propagated to the vibration receiving portion B.
Since the outer peripheral metal fitting 27 is embedded in the outer peripheral portion 28 where the stopper projections 24 are arranged, it is possible to easily and accurately tune the characteristics of the stopper member 1 with respect to the input vibration.

The inner peripheral metal fitting 25 and the outer peripheral metal fitting 27 are separate from each other, and no metal fitting is embedded in the annular connecting portion 29 that connects the fitting tube 26 and the outer peripheral portion 28, so that the weight of the stopper member 1 is reduced. can be achieved.
Since the connection part 29 in which the metal fitting is not embedded is provided, not only the stopper projection 24 but also the connection part 29 are elastically deformed by the impact force generated when vibration is input and the vibration generating part M collides with the stopper member 1. Thus, it is possible to reliably absorb the force, and it is possible to prevent the inner peripheral surface of the fitting cylinder 26 from being strongly pressed against the outer peripheral surface of the inner cylinder 13 .

Since the axial size of the connecting portion 29 is smaller than the respective axial sizes of the fitting tube 26 and the outer peripheral portion 28, the connecting portion 29 is reliably elastically deformed when vibration is input as described above. As a result, it is possible to reliably prevent the inner peripheral surface of the fitting cylinder 26 from being strongly pressed against the outer peripheral surface of the inner cylinder 13 .

The inner peripheral metal fitting 25 is formed in a cylindrical shape, and has a rectangular shape that is long in the axial direction and short in the radial direction when viewed in longitudinal section along the axial direction. can be firmly fixed to the

The inner peripheral surface of the fitting cylinder 26 has a contact portion 21 that contacts the outer peripheral surface of the inner cylinder 13 and a non-contact portion 22 that is spaced radially outward from the outer peripheral surface of the inner cylinder 13 in the circumferential direction. , so that when the stopper member 1 is arranged between the outer cylinder 12 of the anti-vibration bushing 11 and the vibration receiving portion B, the inner peripheral surface of the fitting cylinder 26 is The inner cylinder 13 of the anti-vibration bushing 11 can be easily fitted inside the fitting cylinder 26 with less resistance than in the case where the entire circumference is in contact with the outer peripheral surface of the inner cylinder 13 .

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in the above-described embodiment, the outer cylinder 12 is connected to the vibration generating portion M, and the inner cylinder 13 is connected to the vibration receiving portion B. The tube 13 may be connected to the vibration generator M.
The inner peripheral surface of the fitting cylinder 26 may be brought into contact with the outer peripheral surface of the inner cylinder 13 over the entire circumference.
The inner peripheral metal fitting 25 and the outer peripheral metal fitting 27 may intermittently be scattered or extend in the circumferential direction.
The axial size of the connecting portion 29 may be greater than or equal to the axial sizes of the fitting tube 26 and the outer peripheral portion 28 , and the radial width X of the connecting portion 29 may be and the radial width Z of the outer peripheral portion 28 or less.

In the above-described embodiment, the inner peripheral metal fitting 25 and the fitting tube 26 extend straight over the entire length in the axial direction. The upper portion of each fitting tube 26 may extend radially outward as it goes upward.
When the stopper member 2 is arranged between the outer cylinder 12 of the anti-vibration bushing 11 and the other of the vibration generating portion M and the vibration receiving portion B, the inner cylinder 13 of the anti-vibration bushing 11 can be easily fitted inside the fitting tube 26 .
In the illustrated example, the lower portions of the inner peripheral metal fitting 25 and the fitting tube 26 extend straight in the axial direction, and the connecting portion 29 is connected to the lower portions.

In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the gist of the present invention, and the above-described modifications may be combined as appropriate.

Reference Signs List 1, 2 Stopper member 11 Anti-vibration bush 12 Outer cylinder 13 Inner cylinder 14 Body rubber 21 Contact part 22 Non-contact part 24 Stopper projection 25 Inner peripheral metal fitting 26 Fitting tube 27 Outer peripheral metal fitting 28 Outer peripheral part 29 Connecting part B Vibration receiver Part M Vibration generating part O Center axis

Claims (3)

An outer cylinder attached to one of the vibration generating part and the vibration receiving part, an inner cylinder attached to the other, and a main rubber connecting the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder. the outer cylinder of the anti-vibration bushing comprising
It is disposed between the vibration generating portion and the vibration receiving portion to which the outer cylinder is not attached, and is elastically deformable so as to collide with either the vibration generating portion or the outer cylinder. an annular stopper member,
a fitting cylinder externally fitted to the inner cylinder and having an inner peripheral metal fitting embedded therein;
an outer peripheral portion that encloses the fitting cylinder from the outside in the radial direction and in which an outer peripheral metal fitting is embedded;
an annular connecting portion that connects the fitting cylinder and the outer peripheral portion,
A stopper projection is provided on the outer peripheral portion and protrudes toward the outer cylinder in an axial direction along the central axis of the inner cylinder,
The inner peripheral metal fitting and the outer peripheral metal fitting are separate from each other,
The inner peripheral surface of the fitting cylinder has contact portions that contact the outer peripheral surface of the inner cylinder and non-contact portions that are spaced apart from the outer peripheral surface of the inner cylinder in the radial direction alternately in the circumferential direction. A stopper member configured to be disposed in the 2. The stopper member according to claim 1, wherein an axial size of said connecting portion is smaller than an axial size of each of said fitting tube and said outer peripheral portion. 3. The stopper member according to claim 1, wherein said inner peripheral metal fitting is formed in a cylindrical shape and has a rectangular shape that is long in the axial direction and short in the radial direction when viewed in longitudinal section along the axial direction.

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