JP2000046110A - Stabilizer bush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase spring rigidity in an axially right angle direction, also improve manufacturing and mounting properties, in a stabilizer bush formed by a cylindrical rubber elastic body provided with a center hole to be externally insertion mounted in a stabilizer bar of a vehicle in the center hole to elastically support the stabilizer bar to a body of the vehicle. SOLUTION: In a stabilizer bush 10 constituted by a cylindrical rubber elastic body 18 provided with a center hole 16 piercing through in an axial direction, an inter ring metal fitting 20 provided with a window part 56 extended linearly in an axial direction with a prescribed length in a peripheral direction almost central part positioned to be almost opposed to an opening part 54 by presenting a shape extended in an axial direction with a C-shaped section having the opening part 54 in one part on a circumference is buried in a cylinder wall part of the cylindrical rubber elastic body 18 and arranged so as to be positioned around the center hole 16, also a mounting opening 52 extended over an axial direction total length by dividing the cylindrical rubber elastic body 18 in a similar position to the opening part 54 of the inter ring metal fitting 20 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stabilizer bush mounted on a stabilizer bar and elastically supporting the stabilizer bar on a body of a vehicle. The present invention relates to a stabilizer bush that simultaneously realizes the ease of manufacture and mounting.

[0002]

2. Description of the Related Art As is well known, a stabilizer bush used in a vehicle such as an automobile to improve steering stability, ride comfort, and the like is used to connect suspension arms on both the left and right sides of the vehicle. A cylindrical rubber which is inserted between an intermediate portion of the bar and a body of the vehicle to elastically support the stabilizer bar on the body of the vehicle, and which usually has a center hole penetrating in the axial direction. It is made of an elastic body, and its outer peripheral surface is mounted on the body by a suitable mounting bracket, and is externally mounted on the stabilizer bar at its center hole.

In such a stabilizer bush, it is required to increase the spring stiffness in the direction perpendicular to the axis in order to improve the steering stability. However, as in the conventional stabilizer bush, the stabilizer is constituted by a single rubber elastic body. The bush has a problem that it is difficult to increase the spring rigidity in the direction perpendicular to the axis due to the limitation of the degree of freedom in selecting a rubber material due to durability, slidability, moldability, and the like.

[0004] As one measure against such a problem, Japanese Patent Laid-Open Publication No. Sho 60-180619 discloses a method in which a pair of reinforcing brackets having an arcuate cross section are arranged so as to be opposed to each other in a direction perpendicular to the axis. 1 shows a structure embedded in a rubber elastic body constituting a stabilizer bush. However, in such a stabilizer bush, in the molding process, it is difficult to fixedly position a pair of non-coupled reinforcing metal fittings at predetermined positions in a rubber elastic body molding die. There was an inherent problem that it was difficult.

[0005]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to increase rigidity in a direction perpendicular to an axis and to provide an excellent manufacturing method. It is an object of the present invention to provide a stabilizer bush having a novel structure capable of achieving the easiness and wearability.

[0006]

According to the present invention, there is provided a cylindrical rubber elastic body provided with a center hole penetrating in an axial direction, and a stabilizer bar for a vehicle is provided in the center hole. The stabilizer bush, which is externally attached to the body and is attached to the body of the vehicle on the outer peripheral surface to elastically support the stabilizer bar on the body, has an opening at one place on the circumference. An interling fitting extending in the axial direction with a C-shaped cross section is embedded in a cylindrical wall portion of the cylindrical rubber elastic body, and is disposed so as to be positioned around the center hole;
The cylindrical rubber elastic body is divided at the position of the opening of the interring fitting to provide a mounting opening extending over the entire length in the axial direction, and a circumferential direction substantially opposed to the opening of the interling fitting is provided. The gist of the present invention is a stabilizer bush, wherein a substantially central portion is provided with a window portion that extends linearly in the axial direction with a length that does not reach the entire length in the axial direction of the interconnecting bracket. .

[0007] In the stabilizer bush having the structure according to the present invention, the interconnecting metal fitting is provided inside the cylindrical rubber elastic body so as to surround the center hole provided in the cylindrical rubber elastic body. Therefore, a large spring stiffness can be set in the direction perpendicular to the axis, and the spring is larger than the stabilizer bush provided with a pair of reinforcing fittings described in JP-A-60-180609. Rigidity can be easily obtained.

In the stabilizer bush having the structure according to the present invention, the mounting opening is widened, and the stabilizer bar is fitted in the mounting opening in a direction perpendicular to the axis, and then the mounting opening is closed. Thereby, it can be extrapolated and attached to the stabilizer bar. At this time, in order to widen the mounting opening, it is necessary to also widen the opening of the interconnecting metal fittings. Is small, it is possible to relatively easily bend or bend the interconnecting metal at the portion where the window is formed. Therefore, the opening of the interconnecting metal, and thus the stabilizer bush, can be formed. The mounting opening can be easily expanded with a small force. Moreover,
Since the window portion of the interconnecting metal fitting is substantially opposed to the opening portion in the radial direction, the window portion is bent or bent at a portion where the window portion is formed, so that the opening portion (mounting opening) has a large size. The opening width can be easily obtained.

Further, since the interring fitting is formed to have a C-shaped cross section continuous in the circumferential direction, even when the cylindrical rubber elastic body provided with the interling fitting is integrally vulcanized and formed, The interring fitting can be easily and advantageously positioned and supported at a desired position in the cylindrical rubber elastic body forming die, and excellent manufacturability is realized.

[0010] In the present invention, the interconnecting metal fitting is disposed over substantially the entire length of the cylindrical rubber elastic body in the axial direction, and the cylindrical rubber elastic body is sandwiched between the interconnecting metal fittings. A configuration in which the inner peripheral side and the outer peripheral side have a substantially two-part structure is advantageously employed. By adopting such a configuration, since the intering fitting is disposed over substantially the entire length of the cylindrical rubber elastic body in the axial direction, the spring stiffness in the direction perpendicular to the axis can be more advantageously obtained in the stabilizer bush. . In addition, since the cylindrical rubber elastic body has a substantially two-part structure on the inner peripheral side and the outer peripheral side with the inter-ring fitting interposed therebetween, the cylindrical rubber elastic body is formed on the inner peripheral side and the outer peripheral side. It is possible to vary the material of, for example, the rubber elastic body on the inner peripheral side, while forming a contact portion with the stabilizer bar using a rubber composition excellent in slidability and friction resistance, It is also possible to employ a rubber composition having high spring rigidity as the rubber elastic body on the outer peripheral side.

Further, in the present invention, one window portion of the intering metal fitting is formed so as to have a length not reaching both ends in the axial direction of the interling metal fitting. The located interconnecting metal part is
It is advantageous to adopt a structure in which a pair of connecting portions for connecting the inter-ring fitting portions located on both circumferential sides of the window portion to each other are used. By adopting such a structure, the mountability of the stabilizer bush to the stabilizer bar can be further improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show a bush 10 as a stabilizer bush as an embodiment of the present invention.
It is shown mounted on the stabilizer bar 12 and mounted on the body 14 of the vehicle. The bush 10 is mounted on a stabilizer bar 12 of the vehicle to elastically support the stabilizer bar 12 with respect to the body 14 of the vehicle, and has a center hole 16 penetrating in the axial direction. , Is formed by a main rubber elastic body 18 as a cylindrical rubber elastic body having a cylindrical shape, and is located around the center hole 16 and extends in the direction of the center axis of the center hole 16. An inter ring 20 is embedded in the cylindrical wall of the rubber elastic body 18. The bush 10 is externally mounted on the stabilizer bar 12 through a center hole 16 provided in the rubber elastic body 18 of the main body.
A bracket 22 as a mounting bracket is mounted on the outer peripheral surface of the
The bracket 22 is fixed to a mounting portion 24 provided on the body 14 of the vehicle, so that the bracket 22 is mounted on the body 14 of the vehicle via the bracket 22.

More specifically, the main rubber elastic body 18 is made of a predetermined rubber material, for example, general natural rubber, synthetic rubber such as styrene-butadiene rubber, or acrylonitrile-butadiene depending on the desired product performance. It is formed of a rubber composition obtained by blending a vulcanizing agent, a reinforcing agent, and the like with a rubber raw material such as a special synthetic rubber such as a polymer rubber, as shown in FIGS. 1 to 5. , An inner rubber elastic body 26 located radially inward with the inter-ring 20 interposed therebetween, and an outer rubber elastic body 28 located radially outward with the inter-ring 20.
28 is bonded by vulcanization. The axial lengths of the inner and outer rubber elastic bodies 26 and 28 are both slightly smaller than the axial length of the interring 20, that is, the inner and outer rubber elastic bodies 26 and 28 are formed. The bush 10 is configured such that both axial ends of the inter ring 20 project from both axial ends of the main rubber elastic body 18. In short, the inter ring 20 is provided over substantially the entire length of the main rubber elastic body 18 in the axial direction.
The inner ring and the outer ring are substantially divided into two parts with the inter ring 20 interposed therebetween.

The outer rubber elastic body 28 has a cylindrical shape having a size substantially equal to the outer diameter of the interring 20 and having an inner hole 30 penetrating the entire length in the axial direction. Specifically, in the cross section in the direction perpendicular to the axis, a substantially cylindrical portion 32 of the outer periphery has an arc shape, and both side wall portions 34, 34 extending tangentially from both circumferential ends of the cylindrical bottom portion 32. And the shape of the mounting portion 24 provided on the body 14 of the vehicle, which is perpendicular to the side wall portions 34, 34 and connects the side wall portions 34, 34 (in the present embodiment, a planar shape). , And has a substantially saddle-shaped or semi-cylindrical shape as a whole. Further, the mounting flat portion 36 is formed so as to be parallel to the center axis direction of the center hole 16, so that the stabilizer bar 12 is elastically parallel to the mounting portion 24 of the body 14 of the vehicle. They are to be supported.

Further, stopper projections 38, 38 protruding outward in the direction perpendicular to the axis are formed on the cylindrical bottom portion 32 and both side wall portions 34, 34 of the outer rubber elastic body 28 at both axial ends. ing. On the other hand, the intermediate portion in the axial direction has a smaller diameter than the stopper projection 38, and a stopper recess 44 is formed on the outer peripheral surface between the stopper projections 38, 38.

In addition, on both end surfaces 46, 46 of the outer rubber elastic body 28 in the axial direction, there are provided bulging portions 48 extending continuously in the circumferential direction along the outer peripheral surface of the inter-ring 20, respectively.
Are formed at a predetermined depth in the axial direction, and are opened at each axial end surface 46. These bulging portions 48 and 48 function as a rubber escape portion and the like when the main rubber elastic body 18 (outer rubber elastic body 28) is compressed and deformed.

On the other hand, the inner rubber elastic body 26 has a substantially thick cylindrical shape having a center hole 16 inside, and the inner diameter, that is, the diameter of the center hole 16
Is approximately the same as the outer diameter of the stabilizer bar 12 for externally mounting. On the other hand, the outer diameter of the inner rubber elastic body 26 is the same as the inner diameter of the inter ring 20, and the outer peripheral surface of the inner rubber elastic body 26 is
0.

Particularly, in the present embodiment, the inner rubber elastic body 26 projects radially inward (perpendicular to the axis) with a circumferential length of less than 1/4 of the inner circumferential surface and a predetermined thickness. A pair of rubber projections 50, 50 are integrally formed and are opposed to each other in a direction inclined by approximately 45 ° with respect to the normal direction of the flat mounting portion 36 of the outer rubber elastic body 28. The axial length of the rubber protrusion 50 is equal to the axial length of the inner rubber elastic body 26 on the inner rubber elastic body 26 side, while the length of the inner rubber elastic body 26 is The length is slightly smaller than the axial length, that is, the cross section (see FIG. 4) of the rubber projection 50 is formed in a trapezoidal shape. Thereby, the stability after mounting to the stabilizer bar 12 can be advantageously secured, and when mounting to the stabilizer bar 12 described later,
Even if the rubber projection 50 is elastically deformed, the rubber forming the rubber projection 50 is advantageously prevented from protruding outward beyond both axial ends of the inner rubber elastic body 26.

The thickness of the axially intermediate portion of the outer rubber elastic body 28 where the stopper projection 38 is not formed and the thickness of the inner rubber elastic body 26 where the rubber projection 50 is not provided are: They are configured with approximately the same size. As a result, at the axially intermediate portion of the bush 10, the inter-ring 20 is disposed at a substantially central portion (substantially 部分 portion) in the thickness direction of the main rubber elastic body 18.

Further, the bush 10 is provided with a mounting opening 52 having a cut parallel to the flat mounting portion 36 of the outer rubber elastic body 28 and extending over the entire length in the axial direction. The main body rubber elastic body 18 composed of the inner and outer rubber elastic bodies 26 and 28 is formed by the mounting opening 52.
Is divided at one place on the circumference.
Before the bush 10 is mounted on the stabilizer bar 12, the mounting opening 52 is formed so as to slightly open with a predetermined opening width as shown in FIG. is there.

On the other hand, as shown in FIGS. 6 and 7, the inter ring 20 has a straight tubular cylindrical shape whose inner and outer diameters are substantially constant over the entire length in the axial direction. An opening 54 that extends continuously over the entire length in the axial direction is formed at one location above, and has a C-shaped cross section. Such an inter ring 20 may have a strength that does not substantially cause plastic deformation at the time of load input.
It is formed by subjecting a rolled steel sheet obtained by hot rolling or cold rolling to press bending. Note that the opening width of the opening 54 is slightly larger than the opening width of the mounting opening 52 before mounting to the stabilizer bar 12. Further, as described above, the axial length of the inter ring 20 is set such that the axial ends of the main body elastic body 18 project from the axial ends of the main body elastic body 18. It is slightly larger than the length. Furthermore, the inner diameter of the inter ring 20 is made larger than the diameter of the center hole 16 of the main rubber elastic body 18,
The outer diameter dimension is set so that the inter ring 20 has a predetermined thickness, and the inner peripheral surface and the outer peripheral surface of the inter ring 20 are respectively inner and outer rubber elastic members constituting the main rubber elastic member 18. It is vulcanized and bonded to the outer and inner peripheral surfaces of 26 and 28. The inner diameter and the thickness (outer diameter) of the inter ring 20 can be set in consideration of the thickness of the inner and outer rubber elastic bodies 26 and 28 and the like according to the required product performance and the like.

Further, one window portion 56 is formed at the substantially central portion of the inter ring 20 in the circumferential direction so as to substantially face the opening portion 54 in the radial direction. This window 56
Is a length that does not reach both ends in the axial direction of the inter-ring 20, and is formed linearly in the axial direction with a predetermined circumferential width. In short, the inter ring 20 is connected to the window 56.
And a pair of connecting portions 62, 62 which are located on both sides in the axial direction of the window 56 and connect the both side divided portions 58, 60.
Have a structure formed integrally.

The window 56 has a desired size and a desired size with respect to the rolled steel sheet before the press bending.
It has a shape and is formed by punching with a press machine or the like. Also, the axial width of the window 56, in other words,
Regarding the axial width dimension of each connecting portion 62, when the mounting opening 52 is expanded at the time of mounting the bush 10 to the stabilizer bar 12 described later, that is, when the opening 54 of the 20 can be easily bent or bent, and is set so that durability against such deformation can be ensured. Specifically, the upper limit of the axial width of each connecting portion 62 is preferably set to 5 mm or less, more preferably 2 mm or less in consideration of the material and thickness of the interring 20, and the lower limit thereof. Is preferably set in consideration of workability by punching or the like at the time of forming the window portion 56. Particularly, in the present embodiment, the axial width of each connecting portion 62 is set to approximately 2 mm.

The vulcanization bonding of the interring 20 to the main rubber elastic body 18 is performed at the same time as the vulcanization molding of the main rubber elastic body 18. The elastic body 18 is formed of an integrally vulcanized molded product. After the main ring elastic body 18 is positioned at a desired position in the molding die of the main rubber elastic body 18 (not shown), for example, a rubber material is put into the molding die by a known extruder or the like. When the rubber material is introduced and crosslinked by vulcanization, it is integrally vulcanized and molded.

There, as shown in FIGS.
The inter ring 20 is positioned in the mold so that the main rubber elastic body 18 and the inter ring 20 are coaxially arranged. Further, the mounting opening 5 in the main rubber elastic body 18 is provided.
2 is formed at the same position on the circumference as the opening 54 of the inter ring 20, in other words, in the direction perpendicular to the axis, the mounting opening 52 is formed in the mounting flat portion 36 of the outer rubber elastic body 28. The rubber elastic body 28 extends in a direction in which
The center hole 16 of the main rubber elastic body 18 passes through the opening 54 of the
The vulcanization molding is performed so as to be formed with a structure up to. The mounting opening 52 is formed simultaneously with the vulcanization molding.

In the case of integral vulcanization molding, a rubber material is advantageously introduced into both sides of the inner and outer circumferences, which are substantially divided into two parts with the inter-ring 20 interposed therebetween, so that the inner and outer rubber elastic bodies 26 and 28 are formed. In order to integrally form the inner and outer rubber elastic bodies 26 and 28 while having the required shape, the inter ring 20 is provided with a rubber turning hole 64. The rubber turning holes 64 are formed on the periphery of the interring 20 where the opening 54 and the window 56 are not provided, in a direction perpendicular to the radial direction connecting the opening 54 and the window 56 to each other. Two are provided so as to face each other.

The bush 10 is externally mounted on the stabilizer bar 12 at the center hole 16 provided in the rubber elastic body 18 of the main body, as shown in FIG. As described above, the mounting opening 52 is expanded to be larger than the diameter of the stabilizer bar 12 to be mounted together with the opening 54 of the inter ring 20, and the stabilizer bar 12 is removed from the expanded mounting opening 52. After fitting in the direction perpendicular to the axis, the mounting opening 52 is closed to mount. The mounting opening 5
2, the connecting portion 62 of the inter-ring 20 and the deformable portion 65 of the main rubber elastic body 18 which is formed by the window 56 of the inter-ring 20 and the peripheral portion of the connecting portion 62 are mainly used. The elastic body 18 and the inter-ring 20 are bent or bent. Further, the mounting opening 52 is provided with the stabilizer bar 12.
It is in a slightly open state even after being attached to.

The bush 10 externally mounted on the stabilizer bar 12 in this manner is attached to the body 14 of the vehicle via the bracket 22. Here, the bracket 22 has an outer peripheral shape of the bush 10, that is, a cylindrical bottom portion 32 and both side wall portions 3 of the main rubber elastic body 18.
4, 34 corresponding to the cross-sectional shape in the direction perpendicular to the axis.
And a saddle-shaped portion 66 having a length slightly smaller than the outer peripheral length of the side wall portions 34, 34, and extending from the saddle-shaped portion 66 to both outer sides in the vertical direction, and provided on the body 14 of the vehicle. Plate portion 68 having a shape corresponding to the mounting portion 24
68. The axial cross-sectional shape of the saddle-shaped portion 66 (see FIG. 2) also corresponds to the outer shapes of the stopper projection 38 and the stopper recess 44 of the main rubber elastic body 18, and the shapes corresponding to the respective shapes. Since the positioning recess 70 and the positioning protrusion 72 having the position are superimposed on the stopper protrusion 38 and the stopper recess 44 and attached to the body 14 of the vehicle, the bush 10 is attached to the attachment portion 24 at the time of attachment or after attachment. The displacement in the axial direction from the predetermined mounting position is effectively prevented or eliminated.

For the specific method of mounting the bush 10, the saddle-shaped portion 66 of the bracket 22 is connected to the cylindrical bottom portion 32, both side wall portions 34, 34, and the stopper projection 38 of the bush 10 (the rubber elastic body 18). , The screw hole 74 provided in the mounting portion 24 of the vehicle body 14 and the flat plate portion 68 of the bracket 22.
At 68, the bolt insertion holes 76 (four in this embodiment) provided at positions corresponding to the screw holes 74 are coaxially overlapped so that the flat plate portion 68 of the bracket 22 and the rubber elastic body 18 The mounting bolt 78 is inserted into the bolt insertion hole 76 and screwed into the screw hole 74 while the mounting flat portion 36 of the vehicle is pressed against the mounting portion 24 of the body 14 of the vehicle. Body-14
Of the bush 1
0 of the vehicle body 14 through the bracket 22
Attached to.

When the bush 10 is mounted, the saddle-shaped portion 66 having a length slightly smaller than the outer peripheral length of the cylindrical bottom portion 32 and the side wall portions 34, 34.
The bush 10 having the mounting opening 52 slightly opened before mounting (after mounting on the stabilizer bar 12) is mounted on the vehicle body 14 by using the bracket 22 composed of
In the present embodiment, the bush 10 can be effectively tightened so that the mounting opening 52 is substantially closed at the time of mounting. The restraining force and the holding force in each radial direction of the bar 12 can be advantageously secured. Further, in the mounted state, the rubber projections 50, 50 formed integrally with the inner rubber elastic body 26 are radially compressed by the tightening, and the diameter of the center hole 16 is slightly reduced. , Inner rubber elastic body 26
The inner peripheral surface of the stabilizer bar 12 is securely brought into contact with the inner peripheral surface of the stabilizer bar 12, so that the stabilizer bar 12 can be stably elastically supported and fixed.

Accordingly, in the bush 10 having the above-described structure, the inter-ring 20 surrounds the center hole 16 formed in the main rubber elastic body 18 constituting the bush 10 so that the inter-ring 20 is connected to the main rubber elastic body 18. The spring stiffness of the bush 10 in the direction perpendicular to the axis is effectively increased by the stiffness of the interring 20 because the bush 10 is buried in the cylindrical wall portion. Further, in the present embodiment, since the inter ring 20 is disposed over substantially the entire length of the main rubber elastic body 18 in the axial direction, spring rigidity in the direction perpendicular to the axis can be obtained more advantageously. is there.

The stabilizer bar-1 of the bush 10
In the mounting operation on the second housing 2, the bush 10 can be externally mounted on the stabilizer bar 12 simply by opening the mounting opening 52 largely and inserting the stabilizer bar 12 from there. When the mounting opening 52 is expanded, the opening 54 of the interring 20 is expanded together with the mounting opening 52.
The window 56 of the inter ring 20 allows the pair of connecting portions 6 to be connected.
Since the resistance to bending deformation in the joints 2 and 62 is sufficiently reduced, the connecting portions 62 and 62 can be easily bent or bent with a small force of a finger or the like. In particular, in the present embodiment, since only one window 56 is formed substantially at the center in the circumferential direction of the interring 20 so as to substantially face the opening 54 in the radial direction, In the opening 54
The opening width of the mounting opening 52 and the opening width of the mounting opening 52 can be easily increased, and the stability of the expanded shape and the shape restoring property can be advantageously obtained. Further, the mounting opening 52 is slightly opened before mounting on the stabilizer bar 12, so that the expanding operation is further facilitated.

Further, in the integral vulcanization molding of the main rubber elastic body 18 having the inter ring 20, since the inter ring 20 is formed by a single member, the main rubber elastic body 18 is formed in a molding die of the main rubber elastic body 18. Positioning can be easily performed, and therefore, excellent manufacturability is realized. Further, in the present embodiment, since the axial length of the inter ring 20 is slightly larger than the axial length of the main rubber elastic body 18, both ends of the main rubber elastic body 18 in the axial direction are provided. The axially opposite ends of the inter-ring 20 that are more protruding can be fixedly supported in the molding die of the main rubber elastic body 18, so that it is easier to position the inter-ring 20 in the molding die. It is.

Although the embodiments of the present invention have been described in detail, these are merely examples, and the present invention is not to be interpreted in any limited manner by the specific description in the embodiments.

For example, in the above embodiment, only one window 56 provided in the interring 20 is formed in the axial direction and the circumferential direction, but the shape, width, number, etc. of the windows 56 are not limited. However, for example, a plurality of window portions 56 divided into two or more and extending in a discontinuous manner in the axial direction, and a substantially central portion in the circumferential direction substantially opposed to the opening portion 54 of the interring 20 are provided. It is also possible to provide a plurality of windows 56 spaced apart in the circumferential direction.

In the above embodiment, the mounting opening 52
An opening 54 of the inter ring 20 is provided so as to open in the outer peripheral surface of the one side wall 34 of the outer rubber elastic body 28 and extend in a direction parallel to the mounting flat portion 36 of the outer rubber elastic body 28. However, the formation position and the opening direction of the mounting opening 52 and the opening 54 of the inter ring 20 are as follows.
The mounting opening 52 and the opening 54 are not particularly limited. For example, the mounting opening 52 and the opening 54 may be provided substantially in the middle of the flat mounting portion 36 in a direction perpendicular to the flat mounting portion 36.

Further, the method of forming the mounting opening 52 and the opening 54 is not limited at all. For example, when the interring 20 is formed of a pipe such as a steel pipe, the rubber elasticity of the main body may be reduced. At the time of vulcanization molding of the body 18, the tube body is fixed at a predetermined position in the molding die and integrally vulcanization-molded, and then cut and formed into a predetermined position of the main rubber elastic body 18 having the tube body. Opening 52, opening 5
4 may be simultaneously formed, or only the mounting opening 52 may be formed at the time of vulcanization molding, and the opening 54 may be cut and formed after the vulcanization molding.

In the above-described embodiment, the axial length of the inter ring 20 is larger than the axial length of the main rubber elastic body 18.
The axial length of 0 may be smaller than the axial length of the main rubber elastic body 18.

Further, when integrally vulcanizing and molding, in the above-described embodiment, both ends in the axial direction of the inter ring 20 protruding from both ends in the axial direction of the main rubber elastic body 18 are fixedly supported by a molding die. Although the inter ring 20 is positioned in the mold, the positioning method is described below.
There is no particular limitation, and a method of supporting the interring 20 with a molding die member used for forming the mounting opening 52 may be employed.

Further, in the above embodiment, the main rubber elastic body 18 is embedded in the cylindrical wall by integral vulcanization molding. However, the embedding method is not limited at all, and After vulcanizing and molding the main rubber elastic body 18 so that a void having substantially the same shape as that of the main rubber elastic body 20 is formed in the cylindrical wall portion, an interconnecting 20 is formed in the void formed in the cylindrical wall portion of the main rubber elastic body 18. May be inserted and vulcanized and adhered to the main rubber elastic body 18. Further, the embedding position of the inter ring 20 in the main rubber elastic body 18 is as follows.
There is no particular limitation as long as it is embedded in the cylindrical wall portion of the main rubber elastic body 18, and it is appropriately set according to the required product performance.

The position, size, shape, number, etc. of the rubber projections 50 integrally formed with the inner rubber elastic body 26 constituting the main rubber elastic body 18 are limited to those of the above-described embodiment. Instead, it can be changed as appropriate according to the anti-vibration performance and the like required for the bush 10. Also, without providing the rubber projection 50, the inner rubber elastic body 2
6 may be brought into contact with the stabilizer bar 12 entirely.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements, and the like can be made, and unless such embodiments depart from the spirit of the present invention.
Both are included in the scope of the present invention,
Needless to say.

[0044]

As is apparent from the above description, in the stabilizer bush having the structure according to the present invention,
By adopting the C-shaped cross-section, a large spring stiffness in the direction perpendicular to the axis is ensured, so that excellent steering stability is realized by mounting on a vehicle. Also,
When the stabilizer bush according to the present invention is externally mounted on the stabilizer bar, the opening for mounting can be easily expanded with fingers or the like with a small force due to the provision of the window in the interring bracket. . Furthermore, also in the case of integrally vulcanizing and molding the cylindrical rubber elastic body provided with the interconnecting metal fitting, since the positioning of the interconnecting metal fitting in the molding die of the cylindrical rubber elastic body is performed simply and advantageously, It is easy to manufacture and can stably secure the target product.

[Brief description of the drawings]

FIG. 1 shows a stabilizer bush as one embodiment of the present invention mounted on a stabilizer bar and a vehicle body.
FIG. 4 is a cross-sectional view in a direction perpendicular to the axis, in a state of being attached to the vehicle.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view of the stabilizer bush shown in FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a bottom view of the stabilizer bush shown in FIG. 1;

FIG. 6 is a cross-sectional view in the direction perpendicular to the axis, showing an inter-ring fitting employed in the stabilizer bush shown in FIG. 1;

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is an explanatory sectional view showing a state in which the stabilizer bush shown in FIG. 1 is mounted on the stabilizer bar;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bush 12 Stabilizer bar 14 Vehicle body 16 Center hole 18 Rubber elastic body 20 Interling 52 Mounting opening 54 Opening 56 Window

Claims (3)

[Claims] 1. A cylindrical rubber elastic body provided with a center hole penetrating in an axial direction. The center rubber hole is externally mounted on a stabilizer bar of a vehicle, and the outer peripheral surface is attached to a body of the vehicle. The stabilizer bush for elastically supporting the stabilizer bar on the body by being attached thereto, wherein an interconnecting metal fitting having an opening at one place on the circumference and extending in the axial direction with a C-shaped cross section is formed by the cylindrical shape. The rubber elastic body is embedded in the cylindrical wall portion and disposed so as to be located around the center hole.On the other hand, the cylindrical rubber elastic body is divided at the opening position of the interling bracket,
Along with providing a mounting opening extending over the entire length in the axial direction,
A window that extends linearly in the axial direction with a length that does not reach the entire axial length of the interconnecting fitting is provided at a substantially central portion in the circumferential direction of the interconnecting fitting that is substantially opposed to the opening. A stabilizer bush characterized by the following. 2. The interlocking metal member is provided over substantially the entire length of the cylindrical rubber elastic body in the axial direction, and the cylindrical rubber elastic member is disposed on the inner peripheral side of the interring metal member. And a substantially two-part structure on the outer periphery side.
Stabilizer bush as described in 1 above. 3. The window in the interring fitting,
One piece is formed at a length that does not reach both ends in the axial direction of the interconnecting fitting, and the interconnecting fitting portions located on both axial sides of the window are located on both circumferential sides of the window. The stabilizer bush according to claim 1 or 2, wherein the stabilizer bush is formed as a pair of connecting portions that connect the interconnecting metal parts to each other.