JPH07246826A - Stabilizer supporting structure - Google Patents

Abstract

PURPOSE:To restrict the movement of a stabilizer in the axial direction at an extremely low cost without altering the stabilizer itself. CONSTITUTION:In a supporting structure for a stabilizer 1, a rod steel is bent into an almost U-shape to mold the stabilizer 1, both end rods 3 of which are connected to right and left suspension arms and the center rod 2 of which is supported to a body via bushings 4. To the right and left sides of the center rod 2 of the stabilizer 1, the bushings 4 are rotatably fitted which have one-side ends 4a curved (the curved portions 7) to be adhered to curved shapes (the corners 6) ranging to both end rods 3, so that these bushings 4 may be supported to the body via bushing holders 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stabilizer bar support structure for suppressing rolls of a vehicle body, and more particularly to a stabilizer bar support structure in which axial movement of the bar is restricted.

[0002]

2. Description of the Related Art A stabilizer bar a is formed by bending a steel bar into a substantially U shape as shown in FIG. 7, and both end bars b are connected to left and right suspension arms (not shown) and a central bar. c is supported by the vehicle body via the rubber bush d and the bush holder e. The central rod c is twisted by the difference in rotation of the left and right rods b generated when the vehicle body is rolled, and the roll is restrained by the torsion spring action.

By the way, it is preferable that the stabilizer bar a is not displaced in the axial direction. This is because a large number of links are arranged around the suspension to which the stabilizer bar a is attached, and the moved bar a may interfere with these. However, in the above-described stabilizer bar support structure, since the bush d does not regulate the axial movement of the bar a, the bar a may move in the axial direction.

Further, it is preferable that the stabilizer bar a has a small friction in the rotating direction. This is because if the rotational resistance between the bar a and the bush d is large, the friction in the stroke direction of the suspension becomes large, and the riding comfort (particularly harshness) deteriorates.
However, in the above-described stabilizer bar support structure, the bar a
Since the bush d to be fitted in is made of rubber, friction in the rotation direction is large.

[0005]

Therefore, the stabilizer bar support structure shown in FIGS. 3 and 4 has been developed. In this support structure, tapered portions f are respectively provided on the bush supporting portions of the stabilizer bar a, metal or plastic bushes g are fitted on these tapered portions f, and the bar a is supported on the vehicle body via the bush holder h. .
According to this structure, the axial movement of the bar a is restricted by the taper portion f, and the bush g fitted on the bar a is made of metal or plastic, so that the friction in the rotational direction is small.

However, the tapered portion f is formed by cutting the center bar c of the bar a as shown in FIG.
As shown in (1), the bar a cannot be molded unless the center bar c and the both end bars b are separately manufactured and welded to each other, and in any case, the cost is inevitably high. Further, in the welding method, a twisting torque is applied to the welded portion i, so that durability and reliability become a problem.

[0007] As a related technique, there is known a practical stabilizer 1-106305 "stabilizer displacement prevention structure" in which a large diameter portion for preventing displacement is formed on a stabilizer bar.
In this technique, a large diameter portion has to be machined and formed on the bar itself, so that cost increase cannot be avoided.

An object of the present invention, which was devised in view of the above circumstances, is to provide a support structure for a stabilizer bar, which can restrict axial movement thereof at extremely low cost without changing the stabilizer bar itself. To provide.

[0009]

In order to achieve the above object, the present invention is to form a stabilizer bar by bending a steel bar into a substantially U-shape and connect both end bars to the left and right suspension arms, and a central bar. In the support structure of the stabilizer bar in which the bush is supported by the vehicle body, the bushes whose one end is rounded so as to closely adhere to the rounded shape continuing to both end bars to the left and right of the center bar of the stabilizer bar are respectively rotatable. And is supported on the vehicle body via bush holders.

[0010]

According to the above construction, since the bushes fitted respectively to the left and right sides of the center rod are provided in close contact with each other in a rounded shape continuing from the center rod to both end rods, they are used as axial stabilizer positioning members. Function. Further, since the bush is round-shaped in accordance with the rounded shape in which one end of the bush extends from the central rod to both end rods, the sliding resistance of the contact surface during rotation is reduced, and the friction in the rotational direction is reduced.

[0011]

An embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a structure for supporting a stabilizer bar 1 on a vehicle body, which is formed by bending a steel bar into a substantially U-shape. As shown in the figure, the stabilizer bar 1 formed in a U-shape has a central bar 2 as a torsion bar.
And an end bar 3 as an arm bar (see FIG. 7).

The center rod 2 is supported by the vehicle body via a bush 4 and a bush holder 5, and both end rods 3 are connected to the left and right suspension arms. According to this structure, when a stroke difference occurs between the left and right suspensions, the turning angles of the left and right end rods 3 are displaced, a torsion is applied to the center rod 2, and the roll of the vehicle body is suppressed.

The bush 4 is rotatably fitted to the left and right of the central rod 2, and is rounded so that one end 4a thereof is closely attached to the both-end rods 3 in a round shape. That is, a rounded portion 7 having the same curvature as the corner portion 6 of the stabilizer bar 1 is provided at one end of the bush 4 so as to be in close contact with the corner portion 6.

The bush 4 is made of resin, metal or the like having a high lubricity for the central rod 2. Bush 4
Is divided into two so as to sandwich the central rod 2. A groove 8 into which the central rod 2 is fitted is provided in each of the divided pieces 4x and 4y, and one end 9 of this groove 8 is formed in a flare shape according to the shape of the corner portion 6 of the stabilizer bar 1.

The bush 4 is supported by the vehicle body via a bush holder 5. The bush holder 5 is composed of flanged tubular bodies 5x and 5y which are divided in two so as to sandwich the bush 4, and the flange portion 10 is joined by a bolt 11.

A recess 12 is formed on the inner surface of the bush holder 5, and a projection 13 is formed on the outer surface of the bush 4 to be fitted therein. This prevents axial displacement between the bush holder 5 and the bush 4.
Note that the inner surface of the bush holder 5 may be knurled or the like to prevent relative rotation with the bush 4.

Further, the bush 4 has one end 4a on the side of both end bars 3 protruding from the bush holder 5, and the other end 4b on the opposite side thereof is flush with the bush holder 5. This prevents the bush holder 5 from directly contacting the side surfaces of the both-end rods 3 and prevents the holder 5 from damaging the both-end rods 3.

The operation of this embodiment having the above configuration will be described.

Since the bushes 4 fitted respectively on the left and right sides of the center rod 2 are closely attached to the rounded shape continuing from the center rod 2 to the both end rods 3, the stabilizer functions in addition to the compliance function as the bush 4. It also functions as an axial positioning member for the bar 1. That is, since the rounded portions 7 of the left and right bushes 4 are in close contact with the corner portions 6 of the stabilizer bar, the axial movement of the bar 1 is accurately regulated.

Further, since the rounded portion 7 of the bush 4 is formed in conformity with the rounded shape of the corner portion 6 of the stabilizer bar 1, the contact pressures of their contact surfaces are made uniform,
Rotational resistance when the center rod 2 rotates is reduced, and friction in the rotation direction is reduced. That is, one end 4a of the bush 4 is left rounded without being rounded,
If this is pressed against the corner portion 6 of the bar 1, the bush 4 bites into the corner portion 6 and the friction in the rotational direction is inevitably increased.

Further, the fact that the bush 4 is made of a material such as resin or metal having high lubricity with respect to the central rod 2 also contributes to reduction of friction in the rotational direction.

As described above, according to the present embodiment, the stabilizer bar 1 itself is not changed, and only a slight change in the shape of the bush 4 is performed, that is, the axial movement of the bar 1 is prevented at an extremely low cost. You can In addition, since the friction in the rotation direction is reduced, the movement of the suspension in the initial stroke is improved, and the riding comfort is improved.

This embodiment is particularly effective for large vehicles such as buses. The stabilizer shown in FIG. 7 is normally used to support the stabilizer bar of the conventional bus. However, since the spring constant of the suspension is low, high support rigidity is required, and as a result, the clamping force of the bush d must be increased. ,
The friction in the rotating direction of the bar a was large.
On the other hand, according to this embodiment, since there is no axial displacement of the bar 1, extremely high supporting rigidity can be exerted in the axial direction, so that there is a margin in the supporting rigidity (clamping force of the bush 4) in the rotating direction of the bar 1. It is possible to reduce friction in the rotation direction.

[0025]

As described above, according to the present invention, the axial movement of the stabilizer bar can be regulated without changing the stabilizer bar itself, only by slightly changing the shape of the bush, that is, at an extremely low cost. it can.

[Brief description of drawings]

FIG. 1 is an explanatory view of a support structure for a stabilizer bar showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is an explanatory view of a support structure for a stabilizer bar showing a conventional example.

FIG. 4 is an exploded perspective view of FIG.

FIG. 5 is a diagram showing a manufacturing process of the stabilizer bar shown in FIG.

FIG. 6 is a view showing another manufacturing process of the stabilizer bar shown in FIG.

FIG. 7 is an explanatory diagram of a stabilizer bar support structure showing a conventional example.

[Explanation of symbols]

 1 Stabilizer bar 2 Center bar 3 Both ends bar 4 Bushing 4a One end 5 Bush holder 6 Corner 7 R

Claims (1)

[Claims] 1. A stabilizer bar in which a steel bar is bent into a substantially U-shape to form a stabilizer bar, both ends of the bar are connected to left and right suspension arms, and a center bar is supported by a vehicle body through a bush. In the structure, the left and right sides of the center bar of the stabilizer bar are rotatably fitted with bushes whose one end is rounded so as to closely adhere to the rounded shape continuing to the both end bars, and these bushes are respectively inserted through bush holders. A stabilizer bar support structure characterized by being supported on the vehicle body.