JP3334436B2 - Strut mount - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input separated type strut mount used for a strut type suspension system of a vehicle.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional strut mount. This strut mount is
An inner mounting member 71 having a shaft hole 71a at a central portion, and an intermediate metal fitting 72 disposed coaxially outside the inner mounting member 71;
And a ring-shaped rubber elastic body 7 integrally vulcanized with the inner mounting member 71 and the intermediate metal fitting 72 and interposed therebetween.
3 and a cylindrical portion 74a into which the outer periphery of the intermediate metal fitting 72 is fitted by press-fitting, and a mounting flange portion 74b formed at one end of the cylindrical portion 74a. Outer mounting member 74, mounting flange portion 74b
And a holding plate 75 for compressing the rubber elastic body 73 together with the bottom portion 74c of the outer mounting member 74.

In this strut mount, the distal end of an operating shaft 77 of a shock absorber is inserted into a shaft hole 71a of an inner mounting member 71 and fastened by a nut 77a, and a mounting flange portion 74b of an outer mounting member 74 is mounted with a mounting bolt ( It is attached by fixing to the vehicle body 78 by a not shown) or the like. And the shock absorber and body 7
When an axial vibration is generated between the rubber elastic body 73 and the rubber elastic body 73, the rubber elastic body 73 elastically deforms to absorb the vibration.

FIG. 5 shows another conventional strut mount. This strut mount has an inner mounting member 8 having a shaft hole 81a at the center.
1, a rubber elastic body 82 formed in a ring shape by integral vulcanization molding on the peripheral edge of the inner mounting member 81, and a rubber elastic body 8
An outer mounting member 8 having a cylindrical portion 83a into which the outer peripheral portion of the second fitting portion 2 is fitted, and a mounting flange portion 83b formed at one end of the cylindrical portion 83a and arranged coaxially outside the inner mounting member 81.
3 and the outer mounting member 8 overlapped with the mounting flange portion 83b.
3. A holding plate 84 for compressing the rubber elastic body 82 together with the bottom of
It is composed of

In this strut mount, a distal end of an operating shaft 87 of a shock absorber is inserted into a shaft hole 81a of an inner mounting member 81 and fastened by a nut 77a, and a mounting flange 83b of an outer mounting member 83 is mounted on a mounting bolt ( It is attached by fixing to the vehicle body 88 by a not shown) or the like. And the shock absorber and body 8
When an axial vibration is generated between the rubber elastic body 82 and the elastic member 8, the rubber elastic body 82 elastically deforms to absorb the vibration.

[0006]

Meanwhile, in the conventional strut mount shown in FIG. 4, an intermediate metal fitting 72 bonded and vulcanized to the outer periphery of a rubber elastic body 73 is press-fitted into a cylindrical portion 74a of an outer mounting member 74. Therefore, a state where the rubber elastic body 73 is securely held between the inner mounting member 71 and the outer mounting member 74 is obtained. However, adopting such a structure using the intermediate fitting 73 vulcanized and bonded to the rubber elastic body 73 causes a problem of increasing the cost.

On the other hand, in the case of the strut mount shown in FIG. 5, since the above-described intermediate metal fitting 72 is not used, the cost can be reduced. However, since the outer periphery of the rubber elastic body 82 is directly pressed into the cylindrical portion 83a of the outer mounting member 83, when an axial vibration is input between the shock absorber and the vehicle body 88, the rubber elastic body 82
There is a problem that a stick slip occurs between the cylindrical portion and the cylindrical portion 83a, and abnormal noise is generated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a strut mount which does not generate abnormal noise and can be manufactured at low cost.

[0009]

A strut mount according to the present invention, which solves the above-mentioned problems, comprises an inner mounting member fixedly held on an operating shaft of a shock absorber, a tubular portion, and a vehicle body formed at one end of the tubular portion. Mounting flange fixed to the front
The shock absorber is provided at the other end of the cylindrical
And a bottom having an insertion hole through which the operating shaft of the
Ri and an outer mounting member disposed coaxially outwardly of the inner mounting member, and a rubber elastic body interposed between said outer mounting member and the inner mounting member, the strut mount wherein the outer The mounting member has a through-hole in the cylindrical portion, and the rubber elastic body is formed by integrally vulcanizing the inner mounting member and the outer mounting member, and at least the outer mounting member is formed. The member is non-adhered, and has a holding portion integrally connected to the outer peripheral side of the cylindrical portion through the through hole. .

[0010] In a preferred embodiment of the present invention, the pre-SL rubber elastic body, in the axial direction by said inner mounting member and the bottom portion
In the insertion hole of the bottom part
A notch or a protrusion for adjusting the spring constant of the rubber elastic body is formed in accordance with the shape of the cut or the protrusion.

[0011]

According to the strut mount of the present invention, the rubber elastic body is engaged with the cylindrical part by the holding portion formed integrally with the rubber elastic body through the through hole on the outer peripheral side of the cylindrical part of the outer mounting member. Are held together. Therefore, when an axial vibration is input between the shock absorber and the vehicle body, the relative movement between the cylindrical portion and the rubber elastic body abutting on the cylindrical portion is restricted. As a result, no abnormal noise is generated.

Further, since the rubber elastic body is engaged and held by the holding portion with respect to the cylindrical portion of the outer mounting member, it is not necessary to perform a bonding process or a press-fitting step between the rubber elastic body and the cylindrical portion. This enables cost reduction. And go
If the rubber elastic body is formed so as to change the amount of rubber by forming a cutout or a protruding portion at a portion sandwiched in the axial direction by the bottom of the outer mounting member and the inner mounting member, the spring of the rubber elastic body in the axial direction is The constant is easily adjusted.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a strut mount according to the present embodiment, and FIG. 2 is a bottom view thereof. The strut mount of the present embodiment is disposed between an inner mounting member 1, an outer mounting member 2 coaxially disposed outside the inner mounting member 1, and an inner mounting member 1 and an outer mounting member 2. Rubber elastic body 3
And as main elements.

The inner mounting member 1 is composed of a circular substrate 11 and an annular portion 12 projecting upward from the periphery of the substrate 11 and is integrally formed of metal. In the center of the substrate 11, a shaft hole 1 in which an operating shaft of a shock absorber is mounted.
3 are provided. The outer mounting member 2 is formed of metal in the shape of a bottomed cylinder larger than the inner mounting member 1, and is coaxially arranged outside the inner mounting member 1 with a space therebetween. The outer mounting member 2 has a circular cylindrical portion 21.
A mounting flange portion 22 provided at one end of the cylindrical portion 21 and fixed to the vehicle body; and an insertion hole 26 provided at the other end of the cylindrical portion 21 and having a central portion through which an operating shaft of the shock absorber is inserted.
And a bottom portion 23 having

The cylindrical portion 21 is provided with eight through holes 24 penetrating in the radial direction at equal angular intervals. The mounting flange 22 has a mounting hole 2 through which a mounting bolt is inserted.
5 are provided at four places. Further, the insertion hole 26 provided in the bottom portion 23 is formed in an irregular shape because concave notches 27 are provided at equal angular intervals in a peripheral portion thereof.

The rubber elastic body 3 is formed in a ring shape by integrally vulcanized between the inner mounting member 1 and the outer mounting member 2 is interposed between the inner mounting member 1 and the outer mounting member 2 . The inner portion of the rubber elastic body 3 is formed so as to cover the annular portion 12 of the inner mounting member 1 and the peripheral end of the substrate 11, and has a bulge projecting upward from the mounting flange 22 at its upper end. A part 31 is formed. The bonding surface between the rubber elastic body 3 and the inner mounting member 1 is vulcanized and bonded.

A holding portion 32 integrally formed with the rubber elastic body 3 through the through hole 24 of the cylindrical portion 21 is provided on an outer portion of the rubber elastic body 3. The holding portion 32 is formed in a cylindrical shape along the outer peripheral surface of the cylindrical portion 21. The outer portion of the rubber elastic body 3 is not adhered to the outer mounting member 2. The inner periphery of the lower end of the rubber elastic body 3 is formed so as to correspond to the irregular shape of the insertion hole 26 provided in the bottom 23 of the outer mounting member 2. As a result, a cutout 33 corresponding to the cutout 27 of the insertion hole 26 is provided in a portion of the rubber elastic body 3 that is sandwiched between the bottom 23 and the substrate 11. The spring constant in the axial direction is adjusted by changing the amount of rubber.

As shown in FIG. 3, the strut mount of the embodiment constructed as described above inserts the tip of the operating shaft 5 of the shock absorber into the shaft hole 11 of the inner mounting member 1, and The nut 5a is screwed and fastened to the threaded portion formed in the above, and the mounting flange portion 22 of the outer mounting member 2 is fixed to the vehicle body 6 through the mounting hole 25 by the mounting bolt 6a and the nut 6b. . At this time, the rubber elastic body 3 is appropriately compressed in the axial direction by the bulging portion 31 being in contact with the vehicle body 6 and being pressed by the vehicle body 6 and the bottom portion 23 of the outer mounting member 2.

When an axial vibration is generated between the shock absorber and the vehicle body 6, the rubber elastic body 3 is elastically deformed to absorb the vibration. At this time, the rubber elastic body 3 is attached to the cylindrical portion 21 by a holding portion 32 integrally formed with the rubber elastic body 3 through the through hole 24 on the outer peripheral side of the cylindrical portion 21 of the outer mounting member 2. Since the cylindrical portion 21 is fixed and held, the relative movement between the cylindrical portion 21 and the rubber elastic body 3 which comes into contact with the cylindrical portion 21 is restricted, so that no abnormal noise is generated unlike the related art.

As described above, according to the strut mount of the present embodiment, the rubber elastic body 3 is integrated with the rubber elastic body 3 through the through-hole 25 provided in the cylindrical portion 21 of the outer mounting member 2. Since it is configured to be engaged with and held by the tubular portion 21 by the holding portion 32 formed so as to be connected, when an axial vibration is input between the shock absorber and the vehicle body 6, the tubular portion 21 The relative movement between the rubber elastic body 3 and the rubber elastic body 3 in the axial direction can be restricted, thereby preventing generation of abnormal noise.

The rubber elastic body 3 of the present embodiment has an inside
Vulcanization molding with the attaching member 1 and the outer mounting member 2
It is more formed and together are engaged with and held by the holding portion 32 with respect to the tubular portion 21 of the outer mounting member 2, because it is a non-adhesive to the rubber elastic body 3 and the tubular portion 21, adhesion treatment And the press-fitting step can be omitted, and the cost can be reduced. Further, the rubber elastic body 3 of this embodiment, the shaft with the bottom 23 of the outer mounting member 2 and the substrate 11 of the inner mounting member 1
The portion to be clamped in the direction, the cutout portion 2 of the insertion hole 26
7 are formed corresponding to the notches 33, whereby the bottom portion 23 is formed.
Since the rubber amount of the rubber elastic body 3 at the portion sandwiched between the rubber elastic body 3 and the substrate 11 is changed, the spring constant of the rubber elastic body 3 in the axial direction can be easily adjusted.

In changing the amount of rubber of the rubber elastic body 3, in this embodiment, the bottom portion 23 of the outer mounting member 2 is used.
Is provided with a concave notch 27 at the inner peripheral edge thereof, but a protrusion may be provided opposite to the concave notch 27. Further, instead of the shape of the holding surface of the bottom portion 23 of the outer mounting member 2, the shape of the holding surface of the substrate 11 of the inner mounting member 1 may be irregularly shaped.

[0023]

According to the strut mount of the present invention,
The outer mounting member has a through hole in the cylindrical portion, and the rubber elastic body is
Vulcanization molding with inner and outer mounting members
Together are a non-adhesive and at least the outer mounting member is formed by, for having a holding portion connected integrally formed via the through-hole on the outer peripheral side of the cylindrical portion, to prevent the generation of noise And cost reduction can be achieved.

[0024] Also, rubber elastic body, the bottom of the outer mounting member
The shape of the through the inner mounting member to the part to be clamped in the axial direction, notch or protrusion is provided in the insertion hole of the bottom
By forming the notch or the protruding portion corresponding to the above, the spring constant of the rubber elastic body in the axial direction can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a strut mount according to an embodiment of the present invention.

FIG. 2 is a bottom view of the strut mount according to the embodiment of the present invention.

FIG. 3 is a sectional view showing a state where a strut mount according to the embodiment of the present invention is mounted.

FIG. 4 is a cross-sectional view of a conventional strut mount.

FIG. 5 is a sectional view of another conventional strut mount.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inner mounting member 2 ... Outer mounting member 3 ... Rubber elastic body 5 ... Operating shaft 5a ... Nut 6 ... Body 6a ... Mounting bolt 6
b ... Mounting bolt 11 ... Substrate 12 ... Circular part 13 ... Shaft hole 21 ...
Cylindrical part 22 ... Mounting flange part 23 ... Bottom part 25 ... Through hole 26 ... Insertion hole 27 ... Notch 31 ... Swelling part 32 ... Holding part 3
3. Notch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16F 9/00-9/54 B60G 1/00-25/00 F16F 1/00-6/00

Claims (2)

(57) [Claims] 1. A and the inner mounting member is fixed and held to the operating shaft of the shock absorber, the other of the cylindrical portion and the mounting flange portion fixed to the vehicle body is formed at one end of the cylindrical portion and the cylindrical portion
The operating shaft of the shock absorber is provided at the end and at the center
And an outer mounting member coaxially disposed outside the inner mounting member, the rubber elastic body being interposed between the inner mounting member and the outer mounting member. Wherein the outer mounting member has a through-hole in the cylindrical portion, and the rubber elastic body is formed by integrally vulcanizing the inner mounting member and the outer mounting member. at least said with the outer mounting member is a non-adhesive, strut mount, characterized in that it has a holding portion connected integrally formed via the through-hole on the outer peripheral side of the tubular portion Te. 2. A pre-SL rubber elastic body, the portion to be clamped in the axial direction by said inner mounting member and the bottom part, before
The shape of the notch or protrusion provided in the insertion hole of the bottom
The strut mount according to claim 1 , wherein a notch or a protrusion for adjusting a spring constant of the rubber elastic body is formed corresponding to the shape .