JPS63176713A - Stabilizer device - Google Patents

Abstract

PURPOSE:To improve comfortableness to ride, by supporting a stabilizer bar, which forms a vertical section in its central part to a non-circular shape, in the both ends by a pair of arms so as to be able to relatively rotate about an axial line in the lengthwise direction further the stabilizer bar being swivelable around the horizontal axis and horizontally movable in the central part. CONSTITUTION:If a car body generates rolling, the first member 16 of right and left arms rotates about an axial line L2 displacing one of the second members 18 to the upper and the other to the bottom. Accordingly, the center of a stabilizer bar 12 generates no displacement in a horizontal direction crossing at a right angle with the axial line L1 in the lengthwise direction. Accordingly, the first and second links 42, 44, generating no displacement but large bending force, suppress rolling. While a bound, if it is generated, causes only the first and second members 16, 18 in one side to be displaced, links 42, 44 to be accordingly displaced and the center of the stabilizer bar 12 to be displaced in the horizontal direction. Accordingly, generation of a stabilizer effect is suppressed. By this constitution, the improvement of comfortableness to ride can be promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a stabilizer device, and more particularly to a stabilizer device that includes a stabilizer bar that is coupled to left and right suspension arms of a vehicle and suppresses rolling of the vehicle body.

(Prior Art and Problems) A stabilizer bar that is connected to the left and right suspension arms of a vehicle and generates torsional force in accordance with the phase difference between the left and right suspension arms is effective in suppressing rolling of an f-crazy body. However, even if the vehicle body does not roll, torsional force is generated when a phase difference occurs between the left and right suspension arms due to uneven road surfaces. This is equivalent to a rise in the height of the vehicle, which causes a loss of ride comfort.

The stabilizer device described in JP-A-52-112916 includes a stabilizer bar consisting of two members, and
and an elastic member disposed at the joint between the two members. When the twist angle is small, only the elastic member flexes, and when the twist angle reaches a predetermined value, the stabilizer bar is twisted. This provides non-linearity to the stabilizer bar and addresses the aforementioned problem.

An object of the present invention is to provide a stabilizer device that substantially exhibits a stabilizer effect only when rolling.

(Means for resolving the oil point) The present invention provides a stabilizer device comprising a stabilizer bar and a pair of arms for deforming the stabilizer bar, wherein at least a central portion of the stabilizer bar The bar is formed so that the profile of the cross section perpendicular to the longitudinal direction 1lIlII line is non-circular,
The surface stabilizer bar is supported at its center so as to be swingable around a horizontal axis perpendicular to the longitudinal axis and movable along the horizontal axis, and at both ends thereof is supported by a pair of surface arms. It is supported for relative rotation.

The pair of arms are used while being fixed to suspension arms placed on the left and right sides of the vehicle body, respectively.

(Function and effect) When the eastbound vehicle turns and the vehicle body rolls, one suspension arm becomes bound,
The other suspension arm is in a rebound state, and the absolute values of the vertical displacements of both suspension arms are approximately equal. At this time, the displacement in the horizontal direction perpendicular to the longitudinal axis in the vicinity of the center of the stabilizer bar becomes small, and a large bending force is generated in the stabilizer bar. In this way, a high stabilizer effect can be obtained.

When one of the tires runs on an uneven road surface and a phase difference occurs in the left Ij suspension arm, as one suspension arm moves upward or downward, the center of the stabilizer bar shifts to its longitudinal axis. The stabilizer bar is now displaced in the perpendicular horizontal direction, and the bending force applied to the stabilizer bar is reduced. Thereby, the occurrence of the stabilizer effect can be suppressed and a good riding comfort can be maintained.

(Example) As shown in FIGS. 1 and 2, a stabilizer device 1
0 includes a stabilizer bar 12 and a pair of arms 14 for deforming the stabilizer bar 12.

The stabilizer bar 12 is made of a material with high bending rigidity, such as steel. At least the central portion 13a of the stabilizer bar 12 is formed so that the outline of the cross section perpendicular to the longitudinal axis L1 is non-circular. Illustrated fruit
In example r1, the center portion 13a of the stabilizer bar 12 has a rectangular cross section and is arranged so that its long sides are vertical.

Both ends 13b of the stabilizer bar 12 are formed to have a circular cross section.

Each arm 14 includes a first member 16 having a substantially L-shaped planar shape, and a second member 16 coupled to an inner end of the first member 16.
It consists of a member 18. Outer end 17a of first member 16
is fixed to a suspension arm (not shown) by a coupling structure known per se, and the first member 16 is aligned with the axis L.
It is swung around 2. Inner end 17 of first member 16
b is a cylindrical connecting portion 1 provided in front of the second member 18;
9, and a nut 20 is screwed onto the end portion 17b, thereby joining the first member 16 and the second member 18.

A cylindrical housing 22 is welded to the rear of the second member 18. The housing 22 has a flange 23 at one end, as shown in FIG. The outer race 25a of the rolling bearing 24 abuts against the flange 23, and the flange 2
3 and a snap ring 26 fixed to the housing 22
The outer lace 25a is held together with the outer lace 25a. On the other hand, the end portion 13b of the stabilizer bar 12 having a circular outline is fitted into the inner race 25b of the rolling bearing 24, the washer 28 is applied to this end portion 13b, the nut 30 is screwed, and the inner race 25b is connected to the stabilizer bar 12. It is held between the shoulder of the bar 12 and the washer 28. Thus, the stabilizer bar 12 is supported at both ends by the second members 18 of the pair of arms for relative rotation about the longitudinal axis L1.

The dust seal 32 is attached to the flange 23 of the housing 22.
and the stabilizer bar 12, and the cap 3
4 is fitted into the open end of the housing 22.

The stabilizer bar 12 has a longitudinal axis L1 at its center.
It is supported so as to be swingable around a horizontal axis perpendicular to and movable along the horizontal axis.

In the illustrated embodiment, restraining means 40 are arranged centrally on the stabilizer bar 12 for this purpose.

The restraining means 40 includes a first link 42 and a second link 44. The first link 42 has a spherical portion 43a at its upper end, and its lower end is formed as a concave spherical surface 43b. 1st
The ball portion 43a of the link 42 is fitted into a bracket 48 fixed to the vehicle body 46, and the first link 42 is attached to the vehicle body.
It is three-dimensionally rotatable. On the other hand, the second link 44 has a ball portion 45a at one end thereof, and a screw is provided at the other end 45b. The spherical portion 45a of the second link 44 is fitted into the concave spherical surface 43b of the first link 42, and the second link 44 is connected to the first link 44.
It is three-dimensionally rotatable with respect to the link 42. An end portion 45b of the second link 44 is passed through the center portion 13a of the stabilizer bar 12, a nut 50 is screwed into the end portion 45b, and the second link 44 is coupled to the stabilizer bar 12.

(Operation of the Embodiment) If no bound or rebound occurs in the running vehicle, the first link 42 and the second link 44 are in the position shown by the solid line in FIG. 4.

When the vehicle turns and the vehicle body rolls, for example,
The left suspension arm is in a bound state, and the right suspension arm is in a rebound state. As a result, the first member 16 of the left arm rotates around the axis L2, and the second member 18 of the left arm is displaced upward. at the same time,
The first member 16 of the right arm rotates around the axis L2,
The second member 18 on the right undergoes a downward displacement approximately equal to the absolute value of the displacement of the second member on the left. The movements of the left and right second members 18 are in opposite phases and the absolute values of their displacements are approximately equal, so the center of the stabilizer bar 12 is not displaced in the horizontal direction perpendicular to the longitudinal axis L1, and the first link 42 and the second 2 links 4
4 is at the position of the solid line. As a result, a large bending force is generated in the stabilizer bar, and this force suppresses rolling of the vehicle body.

For example, when the left tire rides on a bump on the road surface and the left suspension arm becomes bound, the first member 16 of the left arm rotates around the axis L2, and the left second
Member 18 is displaced upwardly. However, the first one on the right arm
How many members 16 do not rotate? At this time, the second member 1 on the left
8, the second link and the first link are displaced as shown by 44a and 42a, respectively, and the center of the stabilizer bar 12 is moved upward in the longitudinal direction IP4.
The stabilizer bar 12 is now displaced in the horizontal direction perpendicular to the straight line, and the stabilizer bar 12 is rotated in a direction that reduces its rigidity in the bending direction, so the bending force generated at this time is small and the ride comfort is good. maintained.

Conversely, the left tire falls into a depression in the road surface, and the second left member 1
8 is displaced downward as indicated by 18b, the second link and the first
The links are displaced as 44b and 42b, respectively.

Also at this time, the bending force generated on the stabilizer bar 12 is small.

Fix either the left or right suspension arm to the standard vehicle height value, and set the other one to the angle θ bound around the axis L2.
When rebounding, the force F that the suspension arm receives is the same as the tendency A in Figure 5 for the conventional stabilizer bar.
However, in the stabilizer device according to the present invention, the trend is B, and it can be seen that the force applied to the suspension arm is reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the stabilizer device, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a sectional view taken along line 2-2 in Fig. 1.
FIG. 4 is a schematic diagram showing the action, and FIG. 5 is a graph showing the characteristics during balance and rebound. 10 Stabilizer device, 12 Stabilizer bar, 14: Arm, 16: First member, 18: Second member, 22: Housing, 24: Rolling bearing, 4
0: restraint means, 42: first link, 44: second link. Agent Patent Attorney Nobuyuki Matsunaga Figure 3

Claims (1)

[Claims] A stabilizer device comprising a stabilizer bar and a pair of arms that deform the stabilizer bar, wherein at least a central portion of the stabilizer bar has a non-circular outline in a cross section perpendicular to a longitudinal axis of the stabilizer bar. The stabilizer bar is supported at its center so as to be swingable around a horizontal axis perpendicular to the longitudinal axis and movable along the horizontal axis, and the pair of arms are connected to the longitudinal axis at both ends of the stabilizer bar. A stabilizer device supported for relative rotation around a directional axis.