JP7264708B2 - Stopper member - Google Patents

Description

The present invention relates to stopper members.

Conventionally, an outer cylinder attached to either one of a vibration generating part and a vibration receiving part, an inner cylinder attached to the other, and an inner peripheral surface of the outer cylinder, as shown in Patent Document 1 below, for example. The anti-vibration bush is provided between the outer cylinder of the anti-vibration bushing having a main body rubber connected to the outer peripheral surface of the inner cylinder and the other one of the vibration generating part and the vibration receiving part, and is formed to be elastically deformable. Also known is an annular stopper member into which an inner cylinder is inserted.

JP-A-2006-96093

However, in the conventional art, when 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 comes into pressure contact with the stopper member by, for example, colliding with it, the stopper member However, there was a risk of radial displacement with respect to the anti-vibration bushing.

SUMMARY OF THE INVENTION The present invention has been made in consideration of such circumstances, and provides a stopper member capable of suppressing displacement of the stopper member in the radial direction with respect to the anti-vibration bushing when vibration is input. intended to

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 annular stopper member disposed between and formed to be elastically deformable and into which the inner cylinder is inserted, the stopper member provided at the other of the vibration generating portion and the vibration receiving portion A locked portion to be locked by the locking portion is provided, and the locked portion is arranged radially outward of a radially central portion of the main rubber and extends around the central axis of the inner cylinder. The inner peripheral surface of the stopper member is located radially inside the radially central portion of the main rubber body.

According to this aspect of the invention, the inner peripheral surface of the stopper member is located radially inward of the radial center portion of the main rubber body, so that the inner peripheral surface of the stopper member and the outer periphery of the inner cylinder of the anti-vibration bush The distance between the surface and can be kept short. As a result, vibration is input, and either one of the vibration generating portion and the vibration receiving portion or the outer cylinder of the vibration-isolating bush comes into pressure contact with the stopper member, for example, by colliding with it, and the stopper member presses against the vibration-isolating bush. When the position of the stopper member is about to be shifted in the radial direction with respect to the anti-vibration bush, the inner peripheral surface of the stopper member is brought into contact with the outer peripheral surface of the inner cylinder of the anti-vibration bush, so that the stopper member is radially displaced from the anti-vibration bush. can be suppressed.
Since the stopper member includes the locked portion that is locked by the locking portion provided on the other of the vibration generating portion and the vibration receiving portion, the vibration is input to the vibration generating portion and the vibration receiving portion. When one of them or the outer cylinder of the anti-vibration bush comes into pressure contact with the stopper member, it is possible to reliably suppress the radial displacement of the stopper member with respect to the anti-vibration bush.

Here, the inner peripheral surface of the stopper member has 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. may be arranged alternately.

In this case, the inner peripheral surface of the stopper member 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 alternately in the circumferential direction. Therefore, when the stopper member is arranged between the outer cylinder of the anti-vibration bushing and the other one of the vibration generating portion and the vibration receiving portion, the inside of the stopper member Compared to the case where the peripheral surface is in contact with the outer peripheral surface of the inner cylinder over the entire circumference, the inner peripheral surface side of the stopper member can be made difficult to bend in the axial direction along the central axis, and the durability is improved. In addition, the inner cylinder of the anti-vibration bushing can be easily inserted into the inside of the stopper member with little resistance.

Further, a reinforcing metal fitting is embedded, the locking portion is a hole formed in the other of the vibration generating portion and the vibration receiving portion, and the locked portion is a portion of the stopper member that is the reinforcing member. It may protrude from the portion where the metal fitting is embedded and be fitted to the locking portion.

In this case, since the locked portion protrudes from the portion of the stopper member in which the reinforcing metal fitting is embedded, deformation of the stopper member is suppressed when the locked portion is pushed into the locking portion. and the engaged portion can be easily fitted into the engaging portion.

Further, the reinforcing metal fitting may be formed in an annular shape continuously extending over the entire circumferential direction.

In this case, since the reinforcing metal fitting is formed in an annular shape that extends continuously over the entire circumferential direction, fitting the locked portion into the locking portion and tuning the characteristics of the stopper member against input vibration with high precision. and forming the stopper member can be easily performed.

Further, a stopper projection projecting toward the outer cylinder in an axial direction along the central axis may be provided, and positions of the stopper projection and the engaged portion in the circumferential direction may be different from each other. .

In this case, since the stopper projection is provided, when 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 collides with the stopper projection, this Vibration can be suppressed from being absorbed by the stopper projection and propagating to the vibration receiving portion.
Since the positions of the stopper protrusion and the engaged portion in the circumferential direction are different from each other, vibration is input, and either one of the vibration generating portion and the vibration receiving portion or the outer cylinder of the anti-vibration bushing acts as the stopper. When pressed against the projection, it is possible to suppress the deformation of the locked portion by following the deformation of the stopper projection, thereby suppressing the load applied to the locked portion.

According to the present invention, when vibration is input, the stopper member can be prevented from radially displacing with respect to the anti-vibration bushing.

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;

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 separate 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. A cylinder 13 is inserted. 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 at a portion of the upper surface of the lower wall b2 of the vibration receiving portion B facing the lower surface of the vibration generating portion M in the axial direction. 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 .

Outer peripheral portion 1a of stopper member 1 is thicker than inner peripheral portion 1b and protrudes downward. In addition, the lower surface of the stopper member 1 may be made flat over the entire area. A reinforcing metal fitting 23 is embedded in the outer peripheral portion 1 a of the stopper member 1 . The reinforcing metal fitting 23 is disposed in a portion of the outer peripheral portion 1a of the stopper member 1 located below the inner peripheral portion 1b of the stopper member 1. As shown in FIG. The reinforcing metal fitting 23 is formed in an annular shape continuously extending over the entire circumferential direction. The reinforcing metal fitting 23 has a rectangular shape elongated in the radial direction when viewed in longitudinal section along the axial direction.

The stopper member 1 includes a locked portion 17 that is locked by a locking portion 18 provided on the lower wall b2 of the vibration receiving portion B. As shown in FIG.
The locking portion 18 is a hole formed in the upper surface of the lower wall b2 of the vibration receiving portion B, and in the illustrated example, penetrates the lower wall b2 in the axial direction. The locking portion 18 may be a non-penetrating recess formed in the upper surface of the lower wall b2 of the vibration receiving portion B. As shown in FIG.

The locked portion 17 protrudes downward and is fitted to the locking portion 18 . The locked portion 17 is formed in a cylindrical shape. A retainer projection 17a is formed in an axially intermediate portion of the engaged portion 17. As shown in FIG. The retainer projection 17a has an upper end surface facing upward and abutting on the lower surface of the lower wall b2 of the vibration receiving portion B. As shown in FIG. The protrusion amount of the retainer protrusion 17a decreases downward.
Note that the engaged portion 17 may be formed into a prism shape, a hemispherical shape, or a cylindrical shape, and the engaged portion 17 may not be provided with the retaining protrusion 17a.

The locked portions 17 are arranged radially outward of the radially central portion of the main rubber 14 and are arranged at intervals in the circumferential direction. Three or more engaged portions 17 are arranged at equal intervals in the circumferential direction. In addition, one locked portion 17 may be provided, and in this case, the cost can be suppressed. The radial positions of the engaged portion 17 and the lower surface of the vibration generating portion M are equal to each other. The locked portion 17 protrudes downward from a portion of the stopper member 1 where the reinforcing metal fitting 23 is embedded. The locked portion 17 is formed integrally with the stopper member 1 and arranged on the outer peripheral portion 1 a of the stopper member 1 .

The stopper member 1 is provided with a stopper projection 24 that projects upward (toward the outer cylinder 12 in the axial direction). The stopper projection 24 is formed integrally with the stopper member 1 . 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.
The longitudinal cross-sectional shape along the axial direction of the stopper projection 24 may be changed as appropriate. For example, the stopper protrusion 24 may have a rectangular shape with a horizontally long lower portion and a rectangular shape with an upper portion that is longer in the axial direction than the lower portion when viewed in longitudinal cross section along the axial direction. and a trapezoidal upper portion, or a horizontally long rectangular lower portion and a triangular upper portion.

The stopper protrusions 24 are arranged radially outward from the radially central portion of the main rubber body 14 and 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 protrusion 24 protrudes upward from a portion of the stopper member 1 where the reinforcing metal fitting 23 is embedded. The radial positions of the stopper projection 24 and the lower surface of the vibration generating portion M are equal to each other. The stopper projection 24 is formed integrally with the stopper member 1 and arranged on the outer peripheral portion 1a of the stopper member 1 .

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 size and shape of at least one of the plurality of stopper protrusions 24 may be different from others.

Circumferential positions of the stopper projection 24 and the engaged portion 17 are different from each other. The stopper projection 24 and the engaged portion 17 are spaced apart in the circumferential direction so that they do not overlap in the radial direction.
The positions of the stopper projection 24 and the engaged portion 17 in the circumferential direction may be made equal to each other, or the stopper projection 24 and the engaged portion 17 may partially overlap each other in the radial direction. , the stopper projection 24, and the locked portion 17 may be different from each other in the circumferential direction.
The radial positions of the stopper projection 24 and the engaged portion 17 are equal to each other. Note that the radial positions of the stopper projection 24 and the engaged portion 17 may be different from each other.

The inner peripheral surface of the stopper member 1 is positioned radially inward of the radial center portion of the main rubber 14 . The inner peripheral surface of the stopper member 1 has a contact portion 21 in contact with the outer peripheral surface of the inner cylinder 13 and a non-contact portion 22 spaced radially outwardly from the outer peripheral surface of the inner cylinder 13. They are arranged alternately. The inner peripheral surface of the stopper member 1 is located radially inside the radial center portion of the main rubber 14 over the entire area.

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.

As described above, according to the stopper member 1 according to the present embodiment, the inner peripheral surface of the stopper member 1 is located radially inward from the radially central portion of the main body rubber 14 . , and the outer peripheral surface of the inner cylinder 13 in the anti-vibration bushing 11 can be kept short. As a result, vibration is input, the vibration generating portion M collides with the stopper member 1, and when the stopper member 1 is about to be displaced in the radial direction with respect to the anti-vibration bushing 11, the inner peripheral surface of the stopper member 1 is brought into contact with the outer peripheral surface of the inner cylinder 13 , it is possible to suppress the radial displacement of the stopper member 1 with respect to the anti-vibration bushing 11 .

Since the stopper member 1 includes the locked portion 17 that is locked by the locking portion 18 provided in the vibration receiving portion B, when vibration is input and the vibration generating portion M collides with the stopper member 1, The radial displacement of the stopper member 1 with respect to the anti-vibration bushing 11 can be reliably suppressed.

The inner peripheral surface of the stopper member 1 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. Since the stopper member 1 is arranged alternately, 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 stopper member 1 is completely covered. Compared to the case where the outer peripheral surface of the inner cylinder 13 is abutted over the entire circumference, the inner peripheral surface side of the stopper member 1 can be made difficult to bend in the axial direction, and the durability can be ensured. The tube 13 can be easily inserted inside the stopper member 1 with little resistance.

Since the locked portion 17 protrudes from the portion of the stopper member 1 where the reinforcing metal fitting 23 is embedded, the stopper member 1 is deformed when the locked portion 17 is pushed into the locking portion 18 . This makes it possible to prevent the locking portion 17 from slipping, and the locked portion 17 can be easily fitted into the locking portion 18 .

Since the reinforcing metal fitting 23 is formed in an annular shape continuously extending over the entire circumferential direction, the engagement portion 17 can be fitted into the engagement portion 18, and the characteristics of the stopper member 1 against the input vibration can be controlled with high precision. , and forming the stopper member 1 can be easily performed.

Since the stopper projection 24 is provided, 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 and is suppressed from propagating to the vibration receiving portion B. be able to.
Since the circumferential positions of the stopper projection 24 and the engaged portion 17 are different from each other, when vibration is input and the vibration generating portion M collides with the stopper projection 24, the deformation of the stopper projection 24 is followed. As a result, deformation of the locked portion 17 can be suppressed, and the load applied to the locked portion 17 can be reduced.

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 stopper member 1 may be brought into contact with the outer peripheral surface of the inner cylinder 13 over the entire circumference.
It is not necessary to embed the reinforcing metal fitting 23 in the stopper member 1 .
The reinforcing metal fittings 23 may be intermittently scattered or extended in the circumferential direction.
The locking portion 18 may be a protrusion, and the locked portion 17 may be a hole into which the locking portion 18 is fitted.

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.

1 Stopper member 11 Anti-vibration bushing 12 Outer cylinder 13 Inner cylinder 14 Body rubber 17 Locked portion 18 Locking portion 21 Abutting portion 22 Non-abutting portion 23 Reinforcement bracket 24 Stopper projection B Vibration receiving portion M Vibration generating portion O Center axis

Claims (4)

An outer cylinder attached to one of the vibration generating portion and the vibration receiving portion, an inner cylinder attached to the other , and between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder in the radial direction the outer cylinder of the anti-vibration bush provided with a main body rubber arranged to connect the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder;
An annular stopper member disposed between the other of the vibration generating portion and the vibration receiving portion, formed to be elastically deformable, and into which the inner cylinder is inserted,
a locked portion that is locked by a locking portion provided on the other of the vibration generating portion and the vibration receiving portion;
The locked portion is arranged radially outward from a radially central portion of the main rubber body, and is arranged in plurality around the central axis of the inner cylinder at intervals,
The inner peripheral surface of the stopper member is positioned radially inward from the radial center portion of the main rubber body ,
The inner peripheral surface of the stopper member has contact portions that contact the outer peripheral surface of the inner cylinder and non-contact portions that are spaced radially outward from the outer peripheral surface of the inner cylinder alternately in the circumferential direction. A stopper member arranged and configured . Reinforcement metal fittings are buried,
the locking portion is a hole formed in the other of the vibration generating portion and the vibration receiving portion;
2. The stopper member according to claim 1 , wherein said locked portion protrudes from a portion of said stopper member in which said reinforcing metal fitting is embedded and is fitted into said locking portion. 3. The stopper member according to claim 2 , wherein said reinforcing metal fitting is formed in an annular shape continuously extending over the entire circumferential direction. A stopper protrusion is provided that protrudes toward the outer cylinder in an axial direction along the central axis,
4. The stopper member according to any one of claims 1 to 3 , wherein the stopper protrusion and the engaged portion have different positions in the circumferential direction.

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