JP2001295888A - Vibration control bushing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control bushing formed by combining the ring-shaped resin material 2 and a rubber member 3, capable of securing a required interference even if sliding abrasion is produced in a resin member 2, and capable of maintaining suitable vibration control action for a long time. SOLUTION: This vibration control bushing 1 has the resin material 2 made deformable in its diameter direction by providing a slit 4 on one spot on the circumference of a ring-shaped body and the ring-shaped rubber member 3 to be combined with the resin material 2, and a protruding part 5 fitted to the slit 4 of the resin material 2 in the circumferential direction is provided on the rubber member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration bush related to anti-vibration or sound-proof technology.

[0002]

2. Description of the Related Art A vibration isolating bush shown in FIG. 5 is known as a vibration isolating bush used in a place where vibration occurs in a radial direction such as a motor shaft.
Has a structure in which an annular rubber member 53 is arranged on the outer peripheral side of an annular resin member 52, and the resin member 52 and the rubber member 53 are integrated by vulcanization molding (Japanese Unexamined Patent Publication No. Hei 8- No. 28556).

However, this conventional vibration-isolating bush 5
1, since the resin member 52 is formed into an endless annular body as described above,
Hardly elastically deforms in the radial direction. Therefore, when the sliding wear of the resin member 52 progresses, a situation occurs in which the interference with the sliding partner material becomes insufficient immediately, and there is a disadvantage that it is not possible to exert an appropriate vibration damping action.

In the conventional vibration-isolating bush 51, the resin member 52 and the rubber member 53 are rotated relative to each other to prevent the rubber member 53 from sliding and abrading as described above. 53 are integrated by vulcanization molding. Therefore, at the time of its manufacture, the rubber member 53 must be molded after the resin member 52 is inserted as an insert into a rubber member vulcanization molding die,
In addition, an adhesive must be applied to the outer peripheral surface of the resin member 52 prior to insertion, and thus there is a disadvantage that the production thereof requires much labor and time.

[0005] Also, when the annular resin member 52 is manufactured as a part, a step of cutting the inner and outer diameters of the pipe-shaped material or cutting the pipe-shaped material is necessary, and the yield is thus reduced. There is a disadvantage that it is not so good and its production requires much labor and time.

[0006]

SUMMARY OF THE INVENTION In view of the above, the present invention has been made in view of the above, and in a vibration-isolating bush formed by combining an annular resin member and a rubber member, even if sliding wear occurs on the resin member, a required interference is required. It is an object of the present invention to provide an anti-vibration bush which can secure the vibration control function and can maintain an appropriate anti-vibration action for a long period of time.

Another object of the present invention is to provide an anti-vibration bush in which the resin member and the rubber member can be prevented from rotating relative to each other without being integrated by vulcanization, and thus can be manufactured relatively easily. With the goal.

It is another object of the present invention to provide an anti-vibration bush which does not require cutting the inner and outer diameters of the material when manufacturing the resin member as a component, thereby enabling the resin member to be manufactured relatively easily. And

[0009]

According to a first aspect of the present invention, there is provided an anti-vibration bush according to the first aspect of the present invention, wherein a slit is provided at one position on a circumference of an annular body so as to be deformable in a radial direction. And an annular rubber member combined with the resin member, wherein the rubber member is provided with a protrusion that engages in a circumferential direction with a slit of the resin member.

According to a second aspect of the present invention, there is provided an anti-vibration bush according to the first aspect, wherein the resin member and the rubber member are not adhered to each other. .

According to a third aspect of the present invention, there is provided an anti-vibration bush according to the first aspect of the present invention, wherein the resin member is made of a tape-shaped material which is rolled into a ring. is there.

In the vibration isolating bush according to the first aspect of the present invention having the above-described structure, the resin member is provided with a slit at one position on the circumference of the annular body so as to be deformable in the radial direction. When sliding wear occurs in the resin member, the resin member is backed up by the rubber member and elastically deforms in the radial direction, and is pressed against the sliding counterpart material, whereby it is possible to secure an interference with the counterpart material. Become.

Further, since the two members are prevented from rotating relative to each other by the engagement of the protrusions of the rubber member with the slits of the resin member, it is necessary to integrate the two members by vulcanization molding as in the above-mentioned prior art. Absent. Claim 2 clarifies as one of the constituent elements that the two members are not integrated by vulcanization molding and are not adhered to each other.

In addition, in the vibration-isolating bush according to the third aspect of the present invention having the above-described structure, the resin member is made of a tape-shaped material that is rounded into an annular shape.
There is no need to cut the inner and outer diameters of the material when manufacturing the resin member as a part.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1A shows a front view of an anti-vibration bush 1 according to an embodiment of the present invention, and its longitudinal section is shown in FIG. 1B.

The anti-vibration bush 1 according to this embodiment firstly
An annular outer peripheral resin member 2 is provided, and an inner peripheral rubber member (also referred to as a rubber ring) 3 also presenting an annular shape is combined with the inner peripheral side of the resin member 2.

The resin member 2 on the outer peripheral side is provided with a slit 4 having a predetermined circumferential width at one position on the circumference of the annular body and is deformable in the radial direction, so that the width of the slit 4 can be increased. It is possible to elastically deform so as to change the diameter by narrowing or the like. The actual width of the slit 4 is 5 to 1
It is about 0 mm. The resin member 2 is formed in a ring shape using a predetermined resin material such as a thermoplastic resin as a molding material, and has a slit 4 formed during or after the molding.

The rubber member 3 on the inner peripheral side is formed into an endless annular body using a predetermined rubber material as a molding material, and is fitted to the inner peripheral side of the resin member 2 with a predetermined interference without bonding. I have. In the figure, the axial width of the rubber member 3 is set to be the same as the axial width of the resin member 2. However, the axial width of the rubber member 3 may be smaller than the axial width of the resin member 2. , May also be large.

Further, on the outer peripheral surface 3a of the rubber member 3, there is integrally provided a projection 5 which engages with the slit 4 of the resin member 2 in the circumferential direction. It is sandwiched between a pair of circumferential ends 2a. The radial height of the protrusion 5 is set to be smaller than the radial width of the resin member 2, so that the outer peripheral end surface 5 a of the protrusion 5 is located radially inward of the outer peripheral surface 2 b of the resin member 2. A recess 6 having a pair of circumferential ends 2 a of the resin member 2 as side walls is formed on the outer peripheral side of the protrusion 5.

As shown in FIG. 2, the vibration-isolating bush 1 having the above structure is mounted in an annular mounting groove 8 provided on the peripheral surface of the shaft 7 so as to be slidable on the inner peripheral surface 10 of the shaft hole of the housing 9. Close,
It absorbs the radial vibration generated in the shaft 7, and is characterized in that the following effects are achieved by the above configuration.

That is, first, in the vibration isolating bush 1 having the above structure, the resin member 2 on the outer peripheral side is provided with a slit 4 at one position on the circumference of the annular body so as to be deformable in the radial direction. For this reason, when sliding wear occurs on the outer peripheral surface 2b of the resin member 2, the resin member 2 is backed up by the rubber member 3 on the inner peripheral side thereof and elastically deforms radially outward, so that the shaft hole is formed. It is pressed against the inner peripheral surface 10, whereby it is possible to secure a margin for the inner peripheral surface 10 in the axial direction. Therefore, it is possible to maintain an appropriate vibration damping action for a long period of time.

Further, the projections 5 provided integrally with the rubber member 3 on the inner peripheral side engage with the slits 4 provided on the resin member 2 on the outer peripheral side, whereby the two members 2 and 3 are prevented from rotating together. Therefore, there is no need to integrate the two members 2 and 3 by vulcanization molding as in the above-described prior art, and the two members 2 and 3 can be relatively rotated without integrating the two members 2 and 3 by vulcanization molding. Never do. Therefore, the sliding wear of the rubber member 3 due to the relative rotation of the two members 2 and 3 can be prevented, and the manufacture of the vibration isolating bush 1 can be facilitated.

In the above embodiment, the resin member 2 is formed in a ring shape using a predetermined resin material such as a thermoplastic resin as a molding material, but the inside and outside diameters of the pipe-shaped material are cut or the pipe-shaped material is cut. As described above, it is inconvenient to form the resin member 2 into an annular shape by cutting the material into a ring, so that it takes a lot of trouble and time as described above.
As described in the above, it is preferable that the resin member 2 is formed by rolling a tape-shaped material into an annular shape. In this case, the inner and outer diameters of the pipe-shaped material are cut or the pipe-shaped material is cut. There is no need to cut the ring, and the production of the resin member 2 can be facilitated.

The resin member 2 obtained by rounding the tape-shaped material into an annular shape is, for example, an anti-vibration bush 1 shown in FIG.
1 can be used as a component thereof. This anti-vibration bush (also referred to as a damping bush) 11 is a VCP
It is used as a damper bush or the like of a (continuously variable valve timing mechanism) and is configured as follows.

That is, the anti-vibration bush 11 first
The rubber member 12 has an annular shape. A resin member 13 having an annular shape is integrally formed on an outer peripheral side of the rubber member 12 by vulcanization molding, and an annular shape is similarly formed on an inner peripheral side of the rubber member 12. The metal member 14 is integrated by vulcanization molding.

Among them, the resin member 13 on the outer peripheral side is shown in FIG.
As shown in FIG. 3, a tape-shaped material 13A made of a fluorine-based resin such as PTFE is prepared (A in the figure), and is first cut into a predetermined length (B in the figure), and the adhesive 15 is applied to one surface. It is applied (adhesive can be applied by spraying or the like, C in the same figure), and is rolled into an annular shape (D in the same figure) and inserted into a rubber member vulcanization molding die. Since there is no need to cut the inner and outer diameters of the raw material, the production of the resin member 13 can be facilitated.

The resin member obtained by rolling the tape-shaped material into an annular shape is applicable to the vibration-proof bush other than the vibration-proof bush according to the present invention, and has a very wide use range. . Accordingly, the present application discloses the invention of the following contents in addition to the invention according to the present application.

A. An anti-vibration bush comprising a resin member obtained by rolling a tape-shaped material into an annular shape.

B. An anti-vibration bush comprising: a resin member obtained by rolling a tape-shaped material into an annular shape; and an annular rubber member.

C. An anti-vibration bush comprising: a resin member obtained by rolling a tape-shaped material into an annular shape; and an annular rubber member and a metal member.

D. A method of manufacturing an anti-vibration bush, wherein a tape-shaped material is rolled into a ring to form a resin member.

According to these inventions, the production of the resin member or the vibration-isolating bush is relatively easy,
Since the material is not cut, the effect that the material yield is good can be obtained.

[0034]

The present invention has the following effects.

First, in the vibration isolating bush according to the first or second aspect of the present invention having the above-described structure, the resin member is provided with a slit at one position on the circumference of the annular body so as to be deformable in the radial direction. Therefore, when sliding wear occurs in this resin member, this resin member is backed up by the rubber member and elastically deforms in the radial direction, and is pressed against the sliding partner material, thereby securing an interference with the partner material. It is possible to do. Therefore, it is possible to maintain an appropriate vibration damping action for a long period of time.

Further, since the two members are prevented from rotating with each other by the projection of the rubber member engaging with the slit of the resin member, it is necessary to integrate both members by vulcanization molding as in the above-mentioned prior art. In addition, the two members do not rotate relative to each other without being integrated by vulcanization molding. Therefore, the sliding wear of the rubber member due to the relative rotation of the two members can be prevented, and the manufacture of the vibration isolating bush can be facilitated.

In addition to the above, in the vibration isolating bush according to the third aspect of the present invention having the above-described structure, since the resin member is made of a tape-shaped material that is circularly rounded,
There is no need to cut the inner and outer diameters of the material when manufacturing the resin member as a single component. Therefore, the production of the resin member as a single component can be facilitated.

[Brief description of the drawings]

FIG. 1A is a front view of an anti-vibration bush according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the anti-vibration bush.

FIG. 2 is a cross-sectional view showing a mounting state of the anti-vibration bush.

FIG. 3 is a half cross-sectional view of an anti-vibration bush having a resin member obtained by rolling a tape-shaped material into an annular shape.

FIG. 4 is a diagram illustrating a manufacturing process of a resin member in which a tape-shaped material is circularly rolled in the order of (A), (B), (C) and (D).

FIG. 5 is a cross-sectional view of a vibration-isolating bush according to a conventional example.

[Explanation of symbols]

 Reference Signs List 1, 11 Anti-vibration bush 2, 13 Resin member 2a Circumferential end 2b, 3a Outer peripheral surface 3, 12 Rubber member 4 Slit 5 Protrusion 5a Outer peripheral end surface 6 Recess 13A Material 14 Metal member 15 Adhesive

Claims (3)

[Claims] 1. A slit (4) at one location on the circumference of the annular body
And a ring-shaped rubber member (3) combined with the resin member (2). The rubber member (3) includes the resin member (2). 3. An anti-vibration bush characterized in that a projection (5) engaging circumferentially with the slit (4) is provided. 2. The vibration-isolating bush according to claim 1, wherein the resin member (2) and the rubber member (3) are not adhered to each other. 3. The anti-vibration bush according to claim 1, wherein the resin member (2) is made of a tape-shaped material that is rolled into an annular shape.