JPH0343842Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a suspension system for a vehicle, and particularly to the structure of a stabilizer incorporated in the suspension system.

(Prior Art) In order to reduce the roll angle of a vehicle body and improve running stability, a stabilizer is generally incorporated into a vehicle suspension system. The stabilizer is usually formed in a substantially U-shape, and both ends of the stabilizer are connected to swingable suspension arms that support the wheels, and the vicinity of the bent part of the substantially U-shape is fixed to the frame on the vehicle body side. ing. As a result, when the vehicle body rolls during turning and the left and right wheels are displaced in opposite phases vertically, each suspension arm is also displaced in opposite phases, and accordingly, both ends of the stabilizer are also displaced in opposite phases, causing one pair of the stabilizers to move in opposite phases. Twisting occurs in the middle of the bend. The torsional rigidity of the stabilizer suppresses the swinging displacement of the suspension arm, thereby preventing the roll angle of the vehicle body from becoming excessive.

By the way, in the conventional stabilizer structure,
Since the connection positions of both ends of the stabilizer to the suspension arm are located further outside the vehicle body than the side frames, a predetermined space is required between the side frames and the wheels. For this reason, for example, when using wide tires, it is necessary to increase the space between both side frames, which reduces the bending strength of the car body, and conversely increases the bending strength of the car body. Therefore, if the distance between the side frames is widened, wide tires cannot be used, and in any case, the structure has a limited degree of freedom in terms of layout.

(Purpose of the invention) In view of the above circumstances, the object of the present invention is to provide a stabilizer structure for a vehicle suspension system that does not require any space for the stabilizer between the side frame and the wheel. It is.

(Structure of the invention) The stabilizer structure of a vehicle suspension system according to the invention includes a stabilizer rod extending in the vehicle width direction and having both ends rotatably supported by a pair of side frames.
A pair of arm members are provided inside the vehicle body with respect to the pair of side frames, one end of which is fixed to the stabilizer rod, and the other end of which is connected to a suspension arm and extends in the longitudinal direction of the vehicle body. It is characterized by

In other words, the stabilizer consists of one stabilizer rod that extends in the vehicle width direction and has both ends rotatably attached to the side frame, and one end that is fixed inside the side frame near both ends of the stabilizer rod and extends in the longitudinal direction of the vehicle body. Consists of a pair of arm members,
The other end of this arm member is connected to a part of the suspension arm (preferably a position far from the swing axis), and as the left and right suspension arms swing in opposite phases, this pair of arm members moves in opposite directions. The stabilizer rod swings in phase, thereby creating a twist that generates a reaction force in the center of the stabilizer rod.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view showing the stabilizer structure of a vehicle suspension system according to this embodiment.

A suspension arm 2 is provided below a side frame 1 (only the right frame is shown in the figure) that extends in the front-rear direction on both sides of the vehicle, and the suspension arm 2 is divided into two parts, 2a and 2.
A front end portion of b is swingably supported by a subframe 3 extending in the vehicle width direction, and a rear end portion is connected to a wheel support body 5 that supports a wheel 4.

A bracket 7 that rotatably supports both ends of a stabilizer rod 6 extending in the vehicle width direction is fixed to the lower surface of the side frame 1 located slightly rearward of the suspension arm 2. An arm member 8 adjacent to the side frame 1 and extending toward the front of the vehicle body is located inside the vehicle body with respect to the side frame 1.
The rear end portion 8a is fixed to the stabilizer rod 6 by bolting, so that the arm member 8 cannot freely rotate relative to the stabilizer rod 6. The front end 8b of the arm member 8 is pivotally connected to the upper end of a control link 9 extending in the vertical direction. The lower end of this link 9 is pivotally supported by a U-shaped bracket 11 fixed in a recess 10 formed on the upper surface of the suspension arm 2, and its rotation axis is approximately the same as the swing axis of the suspension arm 2. It is slightly inclined to the front and back direction of the vehicle so that it is parallel to the vehicle.

FIG. 2 is a view taken in the direction of the arrows in FIG. 1, and shows in detail how the control link 9 is connected to the suspension arm 2. FIG.

FIG. 3 is a view taken in the direction of the arrows in FIG. 1, and shows the side shape of the arm 8 in detail.

Next, the operation of the stabilizer structure according to this embodiment will be explained.

For example, when a running vehicle turns to the right and the vehicle body rolls to the left, the wheels on the right side are displaced downward and the wheels on the left side are displaced upwards relative to the vehicle body. The freely adjustable suspension arm also allows the right arm to move downward and the left arm to move upward.

That is, in FIG. 1 showing the right wheel portion, as the wheel 4 and the suspension arm 2 descend, the control link 9 whose lower end is pivotally connected to the suspension arm 2 via the bracket 11 descends. As a result, a downward rotational force acts on the arm member 8 whose front end 8b is pivotally supported on the upper end of the control link 9, and therefore the stabilizer rod fixing the rear end of the arm member 8 is 6, a rotational force is generated that turns the front side downward and the rear side upward.

On the other hand, in the left wheel part (not shown),
As the wheel 4 rises, a force in the opposite direction to that described above acts on the suspension arm 2, control link 9, and arm member 8, which forces the stabilizer rod 6 to turn the rear side downward and the front side upward. A rotational force is generated.

In this way, the stabilizer rod 6 receives rotational forces in opposite directions from a pair of arm members 8 fixed to both ends thereof, causing twisting, but at this time, the torsional rigidity of the stabilizer rod 6 causes each arm member 8 to react. A force is applied, which suppresses the rocking displacement of each suspension arm 2, and prevents the roll angle of the vehicle body from becoming excessive. When the vehicle body rolls to the right, twisting occurs in the opposite direction to the above, and the roll is suppressed in the same manner as above.

In this embodiment, the arm member 8 fixed to the stabilizer rod 6 is shown extending forward from the stabilizer rod 6;
It is also possible to set the mounting positions of both ends to the side frame 1 at a position forward of the recess 10 on the upper surface of the suspension arm 2 so that the arm member 8 extends rearward from the stabilizer rod 6.

In addition, the control link 9 shown in this embodiment
is a member provided to prevent extra external force from acting on the arm member 8, and is not necessarily necessary for the configuration of the stabilizer structure according to the present invention.

(Effects of the invention) As detailed above, in the stabilizer structure of the vehicle suspension system according to the invention, the connecting parts of both ends of the stabilizer to the suspension arm are located inside the vehicle body with respect to the side frame. , there is no need for a space for a stabilizer between the side frame and the wheels located outside the side frame, and therefore the side frame can be expanded outward by that space to improve the bending rigidity of the vehicle body. Furthermore, according to the stabilizer structure of the present invention, it is possible to employ a wide tire that is wider by the space described above.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a stabilizer structure for a vehicle suspension system according to the present invention, FIG. 2 is a view taken in the direction of FIG. 1, and FIG. 3 is a view taken in the direction of FIG. 1...Side frame, 2...Suspension arm, 6...Stable rod, 8...Arm member.

Claims (1)

[Claims for Utility Model Registration] A vehicle suspension in which suspension arms supporting wheels are swingably provided below a pair of side frames extending in the longitudinal direction of the vehicle body and provided on both sides of the vehicle body. The device includes: a stabilizer rod extending in the vehicle width direction and having both ends rotatably supported by the pair of side frames; A stabilizer structure for a vehicle suspension system comprising a pair of arm members extending in the longitudinal direction of a vehicle body, the other end of which is fixed to the suspension arm and connected to the suspension arm.