JPH07190132A - Suspension device - Google Patents

Abstract

PURPOSE:To maintain a toe-in tendency and reduce axial displacement. CONSTITUTION:An outer cylinder fitting 12 is press-fitted into the base end side of a trailing arm 24 for connection. An inner cylinder fitting 16 is disposed on the inside of the outer cylinder fitting 12, and a protruding plate 18 is provided at the end part of the inner cylinder fitting 16. An elastic body 14 made of rubber is disposed between the outer cylinder fitting 12 and the inner cylinder fitting 16. An elastic body 14 is vulcanization-bonded also to a protruding plate 18 and the flange part 12B of the outer cylinder fitting 12. When force along the axial direction of the outer cylinder fitting 12 is applied, since the protruding plate 18 is opposed to the flange part 12B, the elastic body held by the flange part 12B and the protruding plate 18 is pulled to absorb force, so that large displacement is not generated in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device capable of preventing toe-out of wheels, and is suitable for vehicles such as automobiles.

[0002]

2. Description of the Related Art Conventionally, a suspension pivot bush for elastically supporting a trailing arm for supporting a tire of a vehicle, for example, between a trailing arm and a vehicle body is arranged.

FIG. 18 shows the periphery of a trailing arm to which the suspension pivot bush is attached, and a conventional bush type vibration damping device and a suspension device using the same will be described with reference to FIG.

That is, when the vehicle turns, a lateral force F is applied to the tire 122 accordingly. Then, the lateral force F1 generated with the generation of the lateral force F is
The suspension pivot bush (hereinafter, appropriately abbreviated as bush) 110 is added, and the outer cylinder 112 is displaced in the axial direction of the bush 110 with respect to the inner cylinder 114 of the bush 110.

Accordingly, the inner cylinder 114 and the outer cylinder 112 have conical tapered portions 112A and 114, respectively.
The elastic body 116 sandwiched between the A and
The bush 11 is compressed by A and 114A and is deformed so as to push up the outer cylinder 112 in the upward direction (reaction force F2 direction generated in a direction perpendicular to the lateral force F1 with the lateral force F1) in the figure.
The outer cylinder 112 is displaced in a direction perpendicular to the 0 axis direction.

As a result, even if the lateral force F is applied, the outer cylinder 112
Does not tilt with respect to the inner cylinder 114, the bush 1
The trailing arm 124 to which 10 is attached and the tire 122 supported by the trailing arm 124 are
It does not rotate with respect to the vehicle body 120. Therefore, always tire 1
The toe-in tendency of 22 is maintained so that the driver does not feel uneasy when changing lanes or turning.

[0007]

However, in the bush 110 as described above, the toe-in tendency is maintained when the lateral force F is applied, but it is premised on the axial displacement of the outer cylinder 112 by the lateral force F1. Therefore, the steering stability is poor and there is a fear that the driver may feel uneasy.

In view of the above facts, it is an object of the present invention to provide a suspension device which can obtain a toe-in tendency even if the displacement in the axial direction is small.

[0009]

A suspension device according to a first aspect of the present invention includes a pair of anti-vibration devices, which are mounted on the vehicle body at front sides of the vehicle body with respect to the wheels and are separated from each other in the vehicle width direction. In the suspension device in which the wheels are displaceably connected to the vehicle body, the spring constants along the vehicle front-rear direction on the sides of the pair of anti-vibration devices opposed to each other are respectively set to the spring constants of the other anti-vibration devices. It is characterized in that it is smaller than the spring constant along the vehicle front-rear direction.

[0010]

The operation of the suspension device according to claim 1 will be described below.

When a lateral force is applied to the wheels as the vehicle turns, a rearward force acts on the anti-vibration device on the outer side of the turn among the pair of anti-vibration devices, and the anti-vibration device on the inner side of the turn. A forward force is applied to the vehicle.

Since the spring constants of the pair of anti-vibration devices along the vehicle front-rear direction on the opposite sides are smaller than the spring constants of the other sides of the pair of anti-vibration devices along the vehicle front-rear direction, respectively. , The opposing sides of the pair of anti-vibration devices are largely displaced compared to the other sides, and the toe-out tendency is suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A suspension device and a bush according to a first embodiment of the present invention are shown in FIGS. 1 to 7, and this embodiment will be described with reference to these drawings.

FIG. 1 shows an overall view of a torsion beam type suspension device employing a bush according to this embodiment, and FIG. 2 shows a schematic enlarged view of the left wheel side arm and the right wheel side arm. Figure 3 is a schematic enlarged view of
Shown in.

As shown in these drawings, the arm 24 is provided on the outer peripheral side of the pair of suspension pivot bushes 10 which are the vibration isolator for the suspension device according to the present embodiment.
The outer cylindrical metal fittings 12 each having a cylindrical shape and press-fitted into and coupled to the pair of link portions 24 </ b> A constituting the base end side thereof are respectively provided. And the arm 24
Supports a pair of tires 22 on the tip side.

On the other hand, as shown in FIG. 4 which shows the bush 10 in an enlarged manner, the outer tubular metal fitting 12 is an upper end side of the tubular portion 12A constituting the main body portion of the outer tubular metal fitting 12 in FIG. 4 (b). Has a flange portion 12B that spreads to the outer peripheral side, and a ring portion 12C projects upward from the outer peripheral end of the flange portion 12B.

At the position inside the outer tubular metal fitting 12 and coaxial with the outer tubular metal fitting 12, an inner tubular metal fitting 16 formed in a tubular shape is arranged. FIG. 4 of this inner tube fitting 16
(B) On the upper end portion, a projecting plate 18 that is a fan-shaped (shown in FIG. 4A) stress supporting portion is provided, and the projecting plate 18 is a shaft of the outer tubular metal fitting 12. It has a wall surface 18A extending from the outer peripheral surface of the inner tubular member 16 along a direction perpendicular to the direction. And, this inner tube fitting 16
The structure is such that a part of the vehicle body 26 is connected by a bolt 28.

Further, elastic members 14 made of rubber which are vulcanized and bonded to the outer tubular member 12 and the inner tubular member 16 are arranged between the outer tubular member 12 and the inner tubular member 16, and the protruding plate is provided. The elastic body 14 is also vulcanized and bonded to 18 and the flange portion 12B. Therefore, the elastic body 14 is also interposed between the protruding plate 18 and the flange portion 12B.

On the other hand, in order to easily deform the elastic body 14 along the front-rear direction X of the vehicle, the elastic body 14 has a through-hole portion 30 penetrating along the axial direction of the outer tubular fitting 12 or a portion corresponding thereto. A currant portion having a softness is bored, and a hole portion 32 deeply formed along the axial direction of the outer tubular metal member 12 is provided at a position facing the through hole portion 30 with the inner tubular metal member 16 interposed therebetween. It is provided.

Next, the assembly of the bush 10 of this embodiment will be described. When assembling the bush 10, first,
The inner tubular metal member 16 is arranged in the outer tubular metal member 12 so that the elastic body 14 can be integrally vulcanized and bonded, and the elastic body 14 is vulcanized and bonded between them to complete the bush 10. Thereafter, the bush 10 is mounted between the vehicle body 26 and the arm 24 as shown in FIGS. 1, 2 and 3.

Next, the operation of the bush 10 of this embodiment will be described. If the vehicle turns while the vehicle is running,
Along with this, as shown in FIGS. 1, 2 and 3, a lateral force F is generated so as to be applied to the tire 22. Then, the lateral force F1 (which is a force having substantially the same magnitude as the lateral force F) generated along with the generation of the lateral force F is the outer tubular metal member 12 of the bush 10.
Is applied to the bush 10 as a force along the axial direction.

Therefore, when a force is applied along the width direction Z of the vehicle, which is the axial direction of the outer tubular member 12, the elastic body 1
Since the projecting plate 18 is opposed to the flange portion 12B of the outer tubular metal fitting 12 at the wall surface 18A extending along the direction substantially perpendicular to the axial direction of the outer tubular metal fitting 12 via 4, the left side shown in FIGS. In the bush 10 on the wheel side, the elastic body 1 of the portion sandwiched between the flange portion 12B of the outer cylinder fitting 12 and the protruding plate 18 is provided.
Since 4 is pulled to absorb the force and has a large spring constant, a large displacement does not occur between the inner tubular metal fitting 16 and the outer tubular metal fitting 12 in the axial direction of the outer tubular metal fitting 12.

On the other hand, in the bush 10 on the right wheel side shown in FIGS. 1 and 3, the elastic body 14 in the portion sandwiched between the flange portion 12B of the outer tubular fitting 12 and the projecting plate 18 is compressed to absorb the force. Since the spring constant is large, a large displacement does not occur between the inner tubular fitting 16 and the outer tubular fitting 12 in the axial direction of the outer tubular fitting 12.

On the other hand, since the through hole portion 30 and the hole portion 32 are provided, the spring constants of the pair of bushes 10 facing each other in the vehicle front-rear direction are different from those of the bushes 10 on which the projecting plates 18 are arranged. Since the spring constants are relatively smaller than the spring constants along the vehicle front-rear direction, the opposing sides of the pair of bushes 10 are displaced more than the side having the protruding plate 18, and the tendency to toe-out is suppressed.

On the other hand, in the embodiment of the present invention, since the elastic body 14 has the through hole portion 30 and the hole portion 32 on the opposite sides of the pair of bushes 10, respectively.
Outer tubular metal fittings 12 on the opposite sides of the pair of bushes 10
The elastic body 14 is more likely to be deformed in the direction perpendicular to the axial direction of (1) (reaction force F2 direction generated by the lateral force F in opposite directions on the left wheel side and the right wheel side). Therefore, although a large displacement occurs between the inner tubular metal fitting 16 and the outer tubular metal fitting 12 in the direction perpendicular to the axial direction of the outer tubular metal fitting 12, the outer tubular metal fitting 12 and the outer tubular metal fitting 16 along the axial direction of the outer tubular metal fitting 12 are displaced. The displacement between the tubular fitting 12 and the tubular fitting 12 becomes small.

From the above, when the vehicle is changing lanes to which lateral force F is applied or turning, the toe-in tendency is always maintained and excessive oversteer is prevented, and the axial direction (along the vehicle width direction Z) is prevented. The deformation of the bush 10 in the vertical direction) becomes small. As a result, a sense of unity is created between the vehicle body 26 and the arm 24, etc., and steering stability is enhanced, so that the driver does not feel uneasy.

On the other hand, when the vehicle travels and vibrations are transmitted from the road surface side to the outer cylinder fitting 12 via the tire 22 and the arm 24, the elastic body 14 is deformed. As a result, the vibration is absorbed by the resistance based on the internal friction of the elastic body 14, and the vibration is attenuated, so that it becomes difficult to transmit the vibration to the vehicle body 26 side connected to the inner tubular fitting 16.

As shown in FIGS. 2, 3 and 4 (a), the through hole portion 30 is provided only on the front and rear ends of the vehicle so that the elastic body 14 is easily deformed in the longitudinal direction X of the vehicle. Since the holes 32 are formed, the arm 24 is easily displaced particularly in the longitudinal direction X of the vehicle as compared with the vertical direction Y of the vehicle (see FIG. 4A) and the vehicle width direction Z. The ride becomes comfortable. Further, since it is relatively difficult to deform in the up-down direction Y of the vehicle, the arm 24 becomes difficult to move even if the weight of members around the link portion 24A is applied, which also improves the steering stability.

In this embodiment, the inner cylindrical metal member 16 and the fan-shaped protruding plate 18 are formed by cold forging a steel material or an aluminum material and integrally formed as shown in FIG. However, instead of this, the inner tubular metal member 16 and the protruding plate 18 may be integrally manufactured by aluminum die casting.

Further, when the production quantity is small, when the projecting plate 18 made of steel and made by pressing or the like is in contact with the pipe material, as shown in FIG. It may be formed and fixed. Alternatively, the inner tubular metal fitting 16 may be manufactured by press-fitting the protruding plate 18 manufactured by pressing or the like around the pipe material.

Further, the bushing 10 of this embodiment is replaced by a trailing arm type instead of a torsion beam type,
Alternatively, it is needless to say that even if the semi-trailing arm type is adopted, the same operation and effect as described above can be obtained. That is, even if the bush 10 is arranged with an axis inclined with respect to the vehicle width direction Z as in the semi-trailing arm type, a component force acts in the axial direction of the outer tubular metal fitting 12 and It has the same effect as.

Next, a bush 10 according to a second embodiment of the present invention is shown in FIGS. 8 and 9, and this embodiment will be described based on these drawings. The same members as those in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

As in the first embodiment, the elastic body 1 is provided with the outer tubular metal piece 12, the inner tubular metal piece 16, the elastic body 14 and the like.
In place of the through hole 30 and the hole 32, the hole 4 is provided with a hole 36 deeply formed in a ring shape along the axial direction of the outer tubular fitting 12.

Therefore, according to this embodiment, the elastic body 14 is not only provided in the longitudinal direction X of the vehicle but also in the vertical direction Y of the vehicle.
Is easily deformed, and it is difficult to transmit vibrations in the up-down direction Y of the vehicle, and the riding comfort is further improved.

Next, a bush 10 according to a third embodiment of the present invention is shown in FIG. 10, and this embodiment will be described based on this drawing. The same members as those in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

Although the outer cylinder fitting 12, the inner cylinder fitting 16 and the elastic body 14 are provided as in the first embodiment, the ring portion 12C is fitted to the link portion 24A of the arm 24. Compared with the first embodiment, there is a difference that the ring portion 12C of the outer tubular metal fitting 12 is formed longer and the tubular portion 12A is formed shorter. Therefore, as compared with the first embodiment, since the ring portion 12C having a larger diameter is used as the fitting portion, the axial length can be shortened and the bush 10 can have a compact structure.

Along with this, when mounting the bush 10 of this embodiment on the arm 24, the ring portion 12
In order to fit C to the link portion 24A of the arm 24,
Press fit.

Therefore, when the tubular portion 12A is fitted into the link portion 24A by press fitting, the end portion of the ring portion 12C must be pushed to press fit the flange portion 12B.
There is a possibility that the portion near the center of will be deformed by the force at this time and press-fitting of the bush 10 will become difficult, but according to the present embodiment, such a drawback will be eliminated. In particular, compared with the bush 110 having the conventional tapered portions 112A and 114A shown in FIG. 16, the conventional bush 110 cannot adopt such a structure, and thus the conventional bush 11
Although 0 had a drawback that press-fitting was difficult,
Such a defect will be eliminated.

Next, a bush 40 according to a fourth embodiment of the present invention is shown in FIGS. 11 and 12, and this embodiment will be described based on these drawings. The same members as those in the first and third embodiments are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIG. 11, the bush 40 according to this embodiment is constructed by coaxially arranging the inner cylindrical metal member 16 and the cylindrical outer cylindrical metal member 42, and the inside of the outer cylindrical metal member 42. A pair of intermediate cylinders 46, 48 are press-fitted into the. An elastic body 44 made of rubber is stretched between the intermediate cylinders 46 and 48 and the inner cylinder fitting 16. These intermediate tubes 46, 48
At the inner peripheral surface side of the intermediate cylinder 46 in the inside, the elastic body 44 is sandwiched between the projecting plates 18 and formed in an arc shape (shown in FIG. 12).
The formed arc plate 50 is fixed by welding.

Further, the elastic body 44 is provided with a reduced diameter portion 52, which is a hole, at the central portion in the axial direction. A space surrounded by the inner peripheral surface of the outer tubular member 42 and the reduced diameter portion 52 of the elastic body 44 serves as a liquid chamber 54, and a viscous fluid having a high viscosity (for example, 5000 cSt or more) is stored in the liquid chamber 54. It is enclosed.
In this embodiment, for example, silicone oil is used as the viscous fluid.

On the other hand, as shown in FIG. 11, the stirring portion 58 is provided so as to project from the inner tubular metal fitting 16 in the radial direction of the inner tubular metal fitting 16, and the outer peripheral end side thereof faces the inner peripheral side of the outer tubular metal fitting 42. is doing. Further, a cored bar disc 60 is embedded inside the stirring section 58. The core metal disc 60 is formed of a metal plate or the like, and is fixed to the inner tubular metal member 16 by welding or the like.

Next, the assembly of the bush 40 according to this embodiment will be described. First, the inner cylinder fitting 16 as shown in FIG. 12 (a) is inserted into the intermediate cylinders 46, 48, and
As shown in FIG. 3, the intermediate cylinders 46, 4 are vulcanized and bonded so that the elastic body 44 connects the inner cylinder fitting 16 and the intermediate cylinders 46, 48.
8, the elastic body 44, the inner tubular fitting 16 and the like are inserted into the outer tubular fitting 42. Then, caulking is performed to narrow down the outer tubular metal fitting 42 to reduce the outer diameter of the outer tubular metal fitting 42, and as shown in FIG. 11, the outer tubular metal fitting 42 and the intermediate tubes 46 and 48 are fitted together.

After this, a small hole (not shown) is formed in the outer cylinder fitting 42.
, A viscous fluid is injected from this small hole, and it is sealed with a rivet or the like.

Next, the operation of the bush 40 according to this embodiment will be described. When the vibration is input to the bush 40, the vibration is transmitted to the outer tubular metal fitting 42, the elastic body 44, and the inner tubular metal fitting 16 and is absorbed by the resistance based on the internal friction of the elastic body 44. The inner tubular metal fitting 16 and the outer tubular metal fitting 42 are relatively displaced in the direction of arrow A, whereby the stirring portion 5
8 moves in the viscous fluid, the viscous fluid is agitated, and frictional resistance is generated between the viscous fluid and the surface of the agitating portion 58.
This becomes a damping force and the vibration is absorbed.

Therefore, the natural vibration generated when the protrusion of the tire 22 is passed over is reduced in a short time by the damping force of the viscous fluid of the bush 40, and is not transmitted to the vehicle body 26 side forever.

Further, according to this embodiment, the projecting plate 18 is formed on the outer wall metal fitting 42 by the wall surface 18A extending along the direction substantially perpendicular to the axial direction of the outer metal fitting 42 through the elastic body 44.
The holding portion 44A of the elastic body 44, which is opposed to the circular arc plate 50 of the intermediate cylinder 46 fixed to one end of the elastic body 44 and is sandwiched between the projecting plate 18 and the circular arc plate 50, is thicker than the other elastic portions 44B. Therefore, the sandwiching portion 44A sandwiched between the circular arc plate 50 and the projecting plate 18 is pulled to absorb the force.

Therefore, when a force is applied from the arm 24 side along the axial direction of the outer tubular metal fitting 42, a large displacement is caused between the inner tubular metal fitting 16 and the outer tubular metal fitting 42 in the axial direction of the outer tubular metal fitting 42. Do not cause. Further, since the elastic portion 44B of the elastic body 44 is formed thin, the elastic body 44 is more easily deformed in the direction perpendicular to the axial direction of the outer tubular metal fitting 42, and the inner tubular metal fitting 16 and the outer tubular metal fitting 42 are formed. Will cause a large displacement between and.

As a result, even when the lateral force F is applied, the toe-in tendency is always maintained, excessive oversteering is prevented, and the axial deformation of the bush 40 is reduced.

Next, a bush 40 according to a fifth embodiment of the present invention is shown in FIGS. 13 to 15, and this embodiment will be described based on these drawings. The same members as those in the first to fourth embodiments are designated by the same reference numerals, and the duplicated description will be omitted.

As shown in FIGS. 13 to 15, the bush 40 according to this embodiment is similar to the fourth embodiment in that the inner tubular metal member 1
6, the outer cylinder fitting 42, the elastic body 44, the intermediate cylinders 46, 48, etc. are provided, but instead of the core metal disc 60, a pair of blocks 62 made of a metal material are welded to the inner cylinder fitting 16. It is fixed by etc.

Further, between the pair of intermediate cylinders 46, 48 to which the elastic body 44 is vulcanized and bonded, a pair of partition member constituting members 65A, 65B (shown in FIG. 15) each formed in an arc shape are combined. Partition member 64 formed in an annular shape
Are arranged while being fitted into the outer tube fitting 12. Figure 1
As shown in FIGS. 3 to 15, a groove 64A is formed over the entire circumference at the central portion of the partition member 64 in the vertical direction on the outer peripheral surface side, and the groove 64A of the partition member constituting materials 65A and 65B constituting the partition member 64 is formed. From inside the partition member component 65
A pair of orifices 6 serving as passages on the inner peripheral side of A and 65B
8 are drilled respectively.

The space defined by the inner peripheral surface of the outer tubular fitting 12 and the groove 64A of the partition member 64 constitutes a ring-shaped first liquid chamber 66A. A pair of spaces partitioned by the inner peripheral surface of the partition member 64, the protruding portion 44C formed on the elastic body 44, the outer peripheral surface of the inner tubular metal member 16, and the like form a second liquid chamber 66B.
And a third liquid chamber 66C.

Therefore, the first liquid chamber 66A and the second liquid chamber 66B
The first liquid chamber 66A, the third liquid chamber 66C, and the third liquid chamber 66C are always communicated with each other through the orifice 68, and the first liquid chamber 66A, the second liquid chamber 66B, the third liquid chamber 66C, and The orifice 68 is filled with a liquid such as water.

In the bush 40 of this embodiment, since the liquid chamber is communicated by the orifice 68,
It is not necessary to use a highly viscous liquid, and unlike the fourth embodiment, the bush 40 may be assembled in a water tank containing a liquid such as water to seal the liquid.

Next, the operation of the bush 40 of this embodiment will be described. When the vibration is input to the bush 40, the vibration is transmitted to the outer tubular metal fitting 42, the elastic body 44, and the inner tubular metal fitting 16, and the elastic body 44 is deformed and the liquid is stored in the liquid chamber 66.
It flows or resonates between A, 66B, and 66C. As a result, the vibration is absorbed by the resistance based on the internal friction of the elastic body 44, and the frictional resistance when the liquid flows between the liquid chambers 66A, 66B and 66C or the liquid chambers 66A and 66C.
Due to the resonance of the liquid between 6B and 66C, the vibration is absorbed and damped, and the vehicle body 26 is connected to the inner tubular metal member 16.
Vibration is difficult to be transmitted to the side.

Next, a bush 40 according to a sixth embodiment of the present invention is shown in FIGS. 16 and 17, and this embodiment will be described based on these drawings. The same members as those in the first, third, and fourth embodiments are designated by the same reference numerals, and duplicated description will be omitted.

As shown in FIGS. 16 and 17, the bush 40 according to this embodiment is similar to the fourth embodiment in that the inner tubular metal member 1
6, the outer cylinder fitting 42, the elastic body 44, the intermediate cylinders 46, 48 and the like are provided, but the projecting plates 18 are provided at both ends of the inner cylinder fitting 16.

Therefore, according to this embodiment, not only the same operation and effect as those of the fourth embodiment are achieved, but also the inner tubular metal fitting 16 is more effectively effective against the input displacement of the inner tubular metal fitting 16 in the axial direction.
It is possible to cause displacement in a direction perpendicular to the axial direction of.

In the above embodiment, the outer tubular metal fittings 12 and 42 are connected to the arm 24 which is the vibration generating portion, and the inner tubular metal fitting 16 is connected to the vehicle body 26 which is the vibration receiving portion. Needless to say, the structure of may be used. Further, in the above embodiment, the case where the lateral force F acts in the right direction in the drawing has been described, but it is natural that the same action occurs even if the vehicle turns so as to act in the left direction.

Further, in the above-mentioned embodiment, the purpose of the present invention is to prevent vibration of the vehicle body of the vehicle. However, the present invention may be aimed at, for example, vibration control of the engine of the vehicle. Needless to say, it is also used. On the other hand, the shapes and dimensions of the outer cylinder fitting, the inner cylinder fitting, the elastic body, etc. are not limited to those of the embodiment.

[0062]

As described above, the suspension device of the present invention has an excellent effect that the toe-in tendency can be obtained and the steering stability is improved even if the axial displacement is small.

[Brief description of drawings]

FIG. 1 is an overall view of a torsion beam type suspension device using a bush according to a first embodiment of the present invention.

FIG. 2 is a schematic view of the vicinity of an arm on the left wheel side in which the bush according to the first embodiment of the present invention is adopted.

FIG. 3 is a schematic view of the periphery of an arm on the right wheel side that employs the bush according to the first embodiment of the present invention.

4A and 4B are enlarged views of the bush according to the first embodiment of the present invention, in which FIG. 4A is a plan view and FIG. 4B is a sectional view taken along line 4b-4b of FIG. , (C) are bottom views.

5 is a cross-sectional view taken along line 5-5 of FIG.

FIG. 6 is a perspective view of an inner cylinder fitting applied to the bush according to the first embodiment of the present invention.

FIG. 7 is a perspective view of an inner cylinder metal fitting applied to the bush according to the first embodiment of the present invention, and is a view showing an example assembled by welding.

8A and 8B are enlarged views showing a bush according to a second embodiment of the present invention, FIG. 8A is a plan view, and FIG. 8B is a sectional view taken along line 8b-8b of FIG. 8A. , (C) are bottom views.

9 is a sectional view taken along the line 9-9 of FIG.

FIG. 10 is a partial cross-sectional view around an arm on the left wheel side in which a bush according to a third embodiment of the present invention is adopted.

FIG. 11 is an enlarged view of a bush according to a fourth embodiment of the present invention, in which (a) is a plan view and (b) is a sectional view taken along the line 11b-11b of (a). .

FIG. 12 is a view showing the assembly of the bush according to the fourth embodiment of the present invention.

13A and 13B are enlarged views showing a bush according to a fifth embodiment of the present invention, FIG. 13A is a plan view, and FIG. 13B is a sectional view taken along line 13b-13b of FIG. 13A. .

14 is a sectional view taken along the line 14-14 of FIG.

FIG. 15 is a view showing the assembly of the bush according to the fifth embodiment of the present invention.

16A and 16B are enlarged views showing a bush according to a sixth embodiment of the present invention, FIG. 16A is a plan view, and FIG. 16B is a sectional view taken along line 16b-16b of FIG. .

FIG. 17 is a view showing the assembly of the bush according to the sixth embodiment of the present invention.

FIG. 18 is a schematic view around a trailing arm in which a bush according to the related art is adopted.

[Explanation of symbols]

 10 Bush (Vibration Isolator) 12 Outer Cylinder Metal Fitting 14 Elastic Body 16 Inner Cylinder Metal Fitting 18 Projecting Plate 18A Wall Surface 30 Through Hole 32 Hole 40 Bush (Vibration Isolator) 42 Outer Cylinder Metal Fitting 44 Elastic Body 52 Reduced Diameter Part

Claims (1)

[Claims] 1. A wheel is displaceably connected to the vehicle body through a pair of vibration-damping devices that are attached to the vehicle body at a front side of the vehicle body with respect to the wheel and are separated from each other in the vehicle width direction. In the suspension device, the spring constant along the vehicle front-rear direction of the pair of anti-vibration devices facing each other is smaller than the spring constant along the vehicle front-rear direction of the other side of the pair of anti-vibration devices. A suspension device characterized by the above.