JPH09280286A - Fitting structure of stabilizer bush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of horizontal deviation a split part of a stabilizer bush without increasing the number of parts, to improve the durability of a vibration isolating rubber body, and to prevent horizontal deviation from a bush bracket. SOLUTION: In a fitting structure of a stabilizer bush B in which a split 13 extending in the axial direction is provided in a cylindrical vibration isolating rubber body 1, the split 13 is opened and fitted in the vicinity of a bent part of a stabilizer bar S made of a bent rod-shaped material, an inner cylinder of the vibration isolating rubber body 1 is a holding hole 11 of the stabilizer bar S, and tapered parts 11a, 11b of the shape which is gradually expanded outwardly and follows the shape of the bent part are provided on each end part of the holding hole. Even when the vibration isolating rubber body 1 is horizontally deviated, and abutted on the bent part of the stabilizer S, the end parts of the vibration isolating rubber body 1 are tapered along the bent shape, and the horizontal force as the reaction is not generated to prevent the horizontal deviation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stabilizer bush mounting structure for holding a stabilizer bar of a vehicle.

[0002]

2. Description of the Related Art In a vehicle suspension, a stabilizer bush is used to support a stabilizer bar on the vehicle body side (for example, Japanese Utility Model Laid-Open No. 58-1837).
JP-A No. 4-25629, JP-A No. 60-1
No. 80619). Its typical structure is shown in FIG.
In the figure, S is a stabilizer bar formed by bending a rod-shaped material into a substantially U-shape. In the vicinity of the bent portion of the stabilizer bar S, a thick-walled cylindrical vibration-proof rubber body having a flat top surface is provided. A stabilizer bush B consisting of 1 is attached. The anti-vibration rubber body 1 has flange portions 12 at both ends (see FIG. 8).
(B)), bolted to a vehicle frame (not shown) by a U-shaped mounting bracket 2 holding the outer peripheral surface between the flange portions 12 (Fig. 8 (a)).

[0003]

By the way, in order to attach the stabilizer bush B to the stabilizer bar S,
Usually, the vibration-proof rubber body 1 is provided with slits extending from the outer periphery to the inner periphery over the entire length in the axial direction at the top portion, and the slits are opened and attached to the outer periphery of the stabilizer bar S. However, the slits are usually formed in a straight line along the entire length in the axial direction at the top of the vibration-proof rubber body 1. Therefore, the stabilizer bush B slides sideways and abuts on the bent portion S3 of the stabilizer bar. Then (Fig. 8 (b)),
A lateral force may be applied by the movement of the stabilizer bar S, and a lateral shift may occur in the cut portion.

This problem becomes particularly noticeable when the anti-vibration rubber body 1 is made of a highly slidable rubber material in order to favorably rotate the stabilizer bush B and the stabilizer bar S relatively. The repeated reception may cause fatigue of the anti-vibration rubber body 1 or a position shift from the bracket 2.

In order to solve this, for example, a bush serving as a stopper may be arranged adjacent to the stabilizer bush B, but the number of parts is increased and the manufacturing cost is increased.

Therefore, the object of the present invention is to prevent the occurrence of lateral displacement at the slits of the stabilizer bushing without increasing the number of parts, to improve the durability of the vibration-proof rubber member, and to displace it from the bracket. To prevent this.

[0007]

According to the first aspect of the present invention, a stabilizer bar is formed by forming a slit extending in the axial direction on a cylindrical vibration-proof rubber body, and opening the slit to bend and form a rod-shaped member. In the mounting structure of the stabilizer bush attached in the vicinity of the bent portion, the inside of the vibration-proof rubber body is used as a holding hole for the stabilizer bar, and at least the side of the holding hole close to the bent portion of the stabilizer bar. The end portion is provided with a taper portion whose diameter gradually increases toward the outside and which follows the shape of the bent portion.

According to the above construction, even if the anti-vibration rubber body slides sideways and comes into contact with the bent portion of the stabilizer bar, the end portion of the anti-vibration rubber body is tapered so as to conform to the bent portion. No lateral force is generated as a reaction force, and lateral displacement can be prevented.

According to the second aspect of the present invention, at least the end surface portion of the vibration isolating rubber body on the bent portion side has higher rigidity than other portions. Specifically, a flange portion protruding in the radial direction is provided at the end of the vibration-proof rubber body on the side of the bent portion, and a reinforcing plate is embedded in the flange portion along the outer peripheral edge thereof (claim 3). . Alternatively, a flange portion protruding in the radial direction is provided at the end portion on the bent portion side of the vibration damping rubber body,
The flange portion is made of a resin material (claim 4), or an annular groove along the inner peripheral surface is provided at an end portion of the vibration isolating rubber body on the bent portion side, and a resin ring is provided in the annular groove. It can also be fitted (claim 5).

According to the above construction, the end surface portion of the vibration isolating rubber body on the side of the bent portion is reinforced and the rigidity is increased, so that a lateral displacement occurs when the vibration isolating rubber body 1 receives a lateral force. Prevent.

According to the sixth aspect of the present invention, the mounting position of the stabilizer bush of the stabilizer bar is bent into a U-shape, and the stabilizer bush is attached to the bent portion, and the stabilizer bush is attached to the concave side of the bent portion. Fit both side parts and both end parts of the stabilizer bush.

According to the above construction, the stabilizer bush is held between both sides of the bent portion on the concave side, and its axial movement is restricted to prevent lateral displacement.

In the structure of claim 7 of the present invention, the mounting position of the stabilizer bush of the stabilizer bar is set to be smaller than that of the other portion, and the stabilizer bush is attached to the small diameter portion so that both end portions of the small diameter portion are connected to each other. Fit both ends of the stabilizer bush.

According to the above construction, the stabilizer bush is held between the both ends of the small diameter portion, and its axial movement is restricted to prevent lateral displacement.

According to the structure of claim 8 of the present invention, a tubular bracket is fitted on the outer periphery of the vibration-proof rubber body, and at least a part of the edge of the bracket on the bent portion side is extended in the radial direction.
A stopper rubber that restricts the movement of the stabilizer bush in the direction of the bent portion is fixed to the extending portion.

According to the above construction, the stopper rubber restricts the movement of the stabilizer bush in the direction of the bent portion, thereby preventing lateral displacement.

Thus, by constructing as described in claims 1 to 8, it is possible to easily prevent the lateral displacement in the slit portion. Therefore, it is possible to improve the durability of the anti-vibration rubber body and prevent the relative position from being displaced from the bracket without significantly increasing the manufacturing cost.

[0018]

1 (a) and 1 (b) show an embodiment of the present invention. In the figure, a stabilizer bush B is composed of a thick-walled tubular vibration-proof rubber body 1, and the vibration-proof rubber body 1 is formed into a substantially U-shaped cross section having a top surface as a flat surface, and the inside of the stabilizer bar S. The holding hole 11 is formed. The stabilizer bar S is formed by bending a rod-shaped body, and the stabilizer bush B is attached to an intermediate position of a bent portion that is bent into a substantially S shape.

Further, the vibration-proof rubber body 1 has flange portions 12 formed by radially extending the outer peripheral edges of both end portions thereof, and has a U-shape for holding the peripheral surface between the flange portions 12. It is adapted to be fixed to the vehicle frame by a mounting bracket 2.

The anti-vibration rubber body 1 has slits 13 extending from the outer circumference to the inner circumference over the entire axial length. Then, the slit 13 is opened and attached to the outer periphery of the stabilizer bar S, and the holding hole 1 of the anti-vibration rubber body 1 is opened.
A stabilizer bar S is held in the unit 1 so as to be relatively rotatable. It is preferable that the anti-vibration rubber body 1 is made of a highly slidable rubber material, for example, a rubber material containing a higher fatty acid amide, because the stabilizer bar S has good slidability.

Here, the holding hole 11 in which the stabilizer bar S is housed is tapered at both ends in the axial direction as shown in FIG.
a and 11b, and these tapered portions 11a and 11b are formed along the bent shape of the stabilizer bar S. At this time, the stabilizer bush B rotates relative to the stabilizer bar 2, so that the tapered portion 11
A and 11b are provided on the entire inner peripheral surface of the holding hole 11. In addition, when the bent portion of the stabilizer bar S is formed only on one end side of the stabilizer bush B, it is not always necessary to form the tapered portion on the other end.

According to the above structure, even if the stabilizer bush B slides sideways and comes into contact with the bent portion of the stabilizer bar S, the holding hole 11 has a shape along the bent portion. No force is generated. Therefore, it is possible to prevent the lateral displacement from occurring in the cut portion 13 of the vibration-proof rubber body 1, and prevent the vibration-proof rubber body 1 from being fatigued and displaced from the bracket. In addition, since it is possible to deal with this by simply changing the shape of the anti-vibration rubber body 1 forming the stabilizer bush B, it is possible to suppress an increase in cost without increasing the number of parts.

FIG. 2 shows a second embodiment of the present invention. In this embodiment, the reinforcing plate 1 made of metal or resin is provided in the flange portions 12 provided at both ends of the vibration-proof rubber body 1.
4 is buried. At this time, the reinforcing plate 14 is attached to the bracket 2
Are arranged along the outer peripheral edge of the flange portion 12 that abuts on the flange portion 12 to improve the rigidity of the flange portion 12. Further, the reinforcing plate 14 is not embedded in the upper surface and the lower end portion of the vibration isolating rubber body 1 in which the slit 13 is provided, and the slit 13 is easily opened to improve the mounting property.

By doing so, the rigidity of the flange portion 12 becomes sufficiently high, and the durability of the vibration-proof rubber body 1 is improved. Also, when it receives a lateral force, it functions as a stopper,
The anti-vibration rubber body 1 is held between the flange portions 12 at both ends to prevent lateral deviation from occurring at the slits 13. Thus, it is possible to prevent the displacement between the vibration-proof rubber body 1 and the bracket 2. Further, it is possible to suppress an increase in cost without increasing the number of parts.

3A and 3B show a third embodiment of the present invention. In the present embodiment, the mounting position of the stabilizer bush B of the stabilizer bar S is bent in a U-shape, and the stabilizer bush B is mounted at the center of this bent portion S1.

At this time, both concave side portions of the bent portion S1 and both end portions of the stabilizer bush B are fitted to each other, and the stabilizer bush B is held between the both side portions to restrict the movement in the axial direction. Thus, the bent portion S1 functions as a stopper that restricts the movement of the stabilizer bush B and prevents lateral displacement. Therefore, without increasing the number of parts, it is possible to improve the durability with a simple configuration and prevent the positional deviation from the bracket 2.

FIG. 4 shows a fourth embodiment of the present invention,
In the present embodiment, the mounting position of the stabilizer bush B of the stabilizer bar S is set to have a smaller diameter than other portions,
The stabilizer bush B is attached to the center of the small diameter portion S2.

At this time, both ends of the small-diameter portion S2 and both ends of the stabilizer bush B are fitted to each other, and the stabilizer bush B is held between the both ends to restrict the movement in the axial direction. Thus, the small diameter portion S2 functions as a stopper that restricts the movement of the stabilizer bush B, and prevents lateral displacement. Therefore, without increasing the number of parts, it is possible to improve the durability with a simple configuration and prevent the positional deviation from the bracket 2.

FIG. 5 shows a fifth embodiment of the present invention.
In the present embodiment, the flange portions 12 provided on the outer peripheral edges of the both ends of the vibration-proof rubber body 1 are made of a resin material.
Further, the flange portion 12 is provided with a notch 15 at an axially symmetrical position of the slit 13, so that the slit 13 can be easily opened when the anti-vibration rubber body 1 is attached to the stabilizer bar S.

Here, as the resin material, for example, nylon resin, polyethylene resin or the like can be used. And
In the case of nylon resin, what is formed in advance in the shape of the flange portion 12 may be applied with an adhesive and bonded to the outer periphery of the end portion of the vibration-proof rubber body 1. In the case of polyethylene resin,
No adhesive is required, and it can be joined by heat fusion.

Since the resin material has higher rigidity than the rubber material, the rigidity of the flange portion 12 can be improved by doing so. Therefore, the durability of the anti-vibration rubber body 1 is improved, and when the lateral force is generated, the flange portions 1 at both ends are
The anti-vibration rubber body 1 can be held between the two to prevent lateral displacement. Therefore, it is possible to improve durability and prevent positional deviation.

FIG. 6 shows a sixth embodiment of the present invention.
In the present embodiment, an annular groove 16 is provided along the inner peripheral surface at the end of the vibration isolating rubber body 1 on the bent portion side.
A resin ring 3 is fitted inside. At this time, it is preferable that the resin ring 3 has an outer diameter slightly larger than the inner diameter of the annular groove 16 of the vibration-proof rubber body 1 and is press-fitted and fixed in the annular groove 16. In addition, the resin ring 3 is provided with a slit that extends from the outer circumference to the inner circumference, and is opened to fit the stabilizer bar S. Notches may be provided at axially symmetrical positions of the slits to facilitate opening of the slits. Then, the vibration-proof rubber body 1 is mounted and the resin ring 3 is press-fitted and fixed to the inner circumference of the end portion.

Since the resin material has higher rigidity than the rubber material, the rigidity of the end portion on the bent portion side of the vibration isolating rubber body 1 is improved. Therefore, the durability of the vibration-proof rubber body 1 can be improved, and the vibration-proof rubber body 1 can be held between the flange portions 12 at both ends when a lateral force is generated to prevent lateral displacement. Therefore, it is possible to improve durability and prevent positional deviation. In addition,
Since the resin ring 3 is incorporated in the inner circumference of the vibration-proof rubber body 1, the slit does not open when a lateral force is applied.

FIG. 7 shows a seventh embodiment of the present invention.
In the present embodiment, a part of the end portion on the bent portion side of the bracket 2 that holds the outer periphery of the antivibration rubber body 1 is extended in the radial direction, and is provided between the extended portion 21 and the bent portion. A stopper rubber 4 is provided. The stopper rubber 4 has a block shape,
Has a locking portion 41 protruding from the end surface on the bracket 2 side,
This is fitted and fixed in a mounting hole provided in the extending portion 21. Here, the stopper rubber 4 is made of a highly slidable rubber material, for example, a rubber material containing higher fatty acid amide. The stopper rubber 4 may be bonded to the extending portion 21.

According to the above structure, the stopper rubber 4 is attached to the stabilizer bar S before the anti-vibration rubber body 1 moves in the direction of the bent portion of the stabilizer bar S and a lateral force is applied to the anti-vibration rubber body 1. It abuts and regulates its axial movement.
Therefore, lateral displacement is prevented, durability is improved, and positional displacement from the bracket is prevented. Further, since the stopper rubber 4 is made of a highly slidable rubber material,
The frictional force with the stabilizer bar S can be reduced, and the influence on the riding comfort, steering stability, etc. can be minimized.

In each of the above-mentioned embodiments, the holding hole 11 of the stabilizer bush B may be of a shape having a tapered portion at the end as in the case of the first embodiment. By suppressing the occurrence, the effect of improving the durability of the anti-vibration rubber body 1 and the effect of preventing lateral deviation can be further enhanced.

[Brief description of drawings]

1 shows an embodiment of the present invention, (a) is a sectional view of a stabilizer bush, (b) is an IB-IB of (a).
It is a line sectional view.

FIG. 2 shows a second embodiment of the present invention, (a) is a side view of a stabilizer bush, and (b) is a front view of the stabilizer bush.

FIG. 3 is a view showing the third embodiment of the present invention and showing a mounting state of a stabilizer bush.

FIG. 4 is a view showing a fourth embodiment of the present invention and showing a mounting state of a stabilizer bush.

FIG. 5 is a sectional view of a stabilizer bush showing a fifth embodiment of the present invention.

FIG. 6 is a view showing a sixth embodiment of the present invention and showing a mounting state of a stabilizer bush.

FIG. 7 is a view showing a seventh embodiment of the present invention and showing a stabilizer bush attached state.

8A is a view showing a state where a conventional stabilizer bush is assembled to a stabilizer bar, and FIG. 8B is a partially enlarged sectional view of FIG. 8A.

[Explanation of symbols]

 B Stabilizer bush S Stabilizer bar S1 Bending part S2 Small diameter part S3 Bending part 1 Anti-vibration rubber body 11 Holding hole 12 Flange part 13 Notch 14 Reinforcing plate 15 Notch 16 Annular groove 2 Mounting bracket 21 Extension part 3 Resin ring 4 Stopper Rubber 41 Locking part

Claims (8)

[Claims] 1. A structure for mounting a stabilizer bush, which is provided in the vicinity of a bent portion of a stabilizer bar formed by bending a rod-shaped member by forming a slit extending in an axial direction in a cylindrical vibration-proof rubber body. In, while the inside of the vibration-proof rubber body is used as a holding hole for the stabilizer bar, at least the end of the holding hole on the side closer to the bent portion of the stabilizer bar is gradually expanded outward. A stabilizer bush mounting structure, characterized in that a tapered portion having a shape along the bent portion is provided. 2. A mounting structure of a stabilizer bush, which is provided in the vicinity of a bent portion of a stabilizer bar formed by bending a cylindrical member by forming a slit extending in an axial direction in a cylindrical vibration-proof rubber body and opening the slit. In the stabilizer bush mounting structure, at least the end surface portion of the vibration isolating rubber body on the bent portion side has higher rigidity than other portions. 3. A flange portion projecting in a radial direction is provided at an end portion on the bent portion side of the vibration-proof rubber body, and a reinforcing plate is embedded in the flange portion along an outer peripheral edge thereof. Stabilizer bush mounting structure. 4. The stabilizer bush mounting structure according to claim 2, wherein a flange portion protruding in a radial direction is provided at an end portion of the vibration isolating rubber body on the bent portion side, and the flange portion is made of a resin material. 5. The stabilizer bush according to claim 2, wherein an annular groove is provided along an inner peripheral surface at an end portion of the vibration isolating rubber body on the bent portion side, and a resin ring is fitted in the annular groove. Mounting structure. 6. A structure for mounting a stabilizer bush, which is provided in the vicinity of a bent portion of a stabilizer bar formed by bending a cylindrical member by forming a slit extending in an axial direction on a cylindrical vibration-proof rubber body and opening the slit. In the stabilizer bar, the mounting position of the stabilizer bush is bent in a U-shape, and the stabilizer bush is attached to the bent portion, and both side portions on the concave side of the bent portion and both end portions of the stabilizer bush are Stabilizer bush mounting structure, characterized in that 7. A structure for mounting a stabilizer bush, which is provided in the vicinity of a bent portion of a stabilizer bar formed by bending a cylindrical material by forming a slit extending in an axial direction on a cylindrical vibration-proof rubber body and opening the slit. In the stabilizer bar, the mounting position of the stabilizer bush is smaller than that of the other portion, the stabilizer bush is attached to the small diameter portion, and both ends of the small diameter portion and both ends of the stabilizer bush are fitted. Stabilizer bush mounting structure characterized by matching. 8. A structure for mounting a stabilizer bush, which is provided in the vicinity of a bent portion of a stabilizer bar formed by forming a slit extending in an axial direction on a tubular vibration-proof rubber body and opening the slit to bend and form a rod-shaped member. In, a tubular bracket is fitted to the outer periphery of the vibration-proof rubber body, and at least a part of the bent portion side edge of the bracket is extended in the radial direction,
The stabilizer bush mounting structure is characterized in that a stopper rubber that restricts movement of the stabilizer bush in the direction of the bent portion is fixed to the extending portion.