JPH0379410A - Axle suspension - Google Patents

Abstract

PURPOSE:To reduce transverse force that works on a suspension at the time of side collision of automobile, so as to prevent damage to the device by forming a U-shaped folded part on a general shaft of a Panhard rod whose ends are mounted on an axle and on a car body, respectively. CONSTITUTION:In a suspension 10, according to the bounding or rebounding of right and left wheels 12, 12a, an axle tube 14 is moved up and down as a car axis. A Panhard rod 24 is moved up and down at the same time with the rotation of each rubber bush 26, 26a, whereby the movement of the axle tube 14 to the right and left is regulated. On the center part of a general shaft 24a of the Panhard rod 24, a U-shaped folded part 30 directed downward is formed. When the excess of transverse force is input to the axle tube 14 due to the side collision of an automobile and so on, the U-shaped folded part 30 of the Panhard rod 24 is deformed, so as to absorb the transverse force. The transverse force working on the suspension 10 can be reduced thereby, and the damage thereto can thus be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an axle suspension system, and more particularly to an axle suspension system in which the left and right movement of the axle is restricted by a Panhard rod.

Conventional technology Traditionally, vehicle suspension systems have been divided into two types: axle-type suspension systems and independent suspension systems;
The right wheel is connected via one axle.

At C, the axle is supported on the vehicle body side via a leaf spring, or supported on the vehicle body side via a coil spring, an arm, etc., and the axle is also moved in the left-right direction of the vehicle using a Panhard rod. )
There is something I did.

That is, the above-mentioned Panhard rod is, for example, disclosed in Japanese Patent Application Laid-Open No. 57-842.
10 and Utility Model Application Publication No. 62-44709, the Panhard rod is arranged in the left-right direction of the vehicle along the axle, one end is rotatably attached to the axle, and the other end is rotatably attached to the axle. The end is rotatably attached to the vehicle body.

Problems to be Solved by the Invention However, in such conventional axle suspension systems, the general shaft portion of the Panhard rod is formed in a straight line approximately along the straight line connecting the mounting portions at both ends. The strength of the Panhard rod in the axial direction, that is, in the lateral direction of the vehicle, was extremely large.

In this way, the Panhard rod's high strength in the axial direction is advantageous in regulating the displacement of the axle, but if an excessive lateral force is applied to the suspension system, for example, the vehicle may spin and the side of the wheel may In the event of a collision, the Panhard rod becomes a rigid body and supports this lateral force, which poses a problem in that the main body of the suspension system, such as the wheel mounting portion or axle, may be damaged.

In view of such conventional problems, the present invention provides an axle suspension system that prevents damage to the main body of the suspension system by absorbing excessive lateral force by deforming a relatively inexpensive Panhard rod. The purpose is to

Means for Solving the Problems In order to achieve the object, the present invention has an axle that connects and supports left and right wheels, and an axle that is arranged in the left-right direction of the vehicle, one end of which is attached to the axle, and the other end of which is attached to the vehicle body. A Panhard rod attached to the side of the axle suspension system is constructed by forming a U-shaped bent portion in the general shaft portion of the Panhard rod.

Further, it is preferable that the U-shaped bent portion is formed such that substantially the entire general shaft portion of the Panhard rod is offset downward from a straight line connecting both end attachment portions.

In the axle type suspension system of the present invention with the above structure,
Since the U-shaped bent portion is formed on the general shaft portion of the Panhard rod, the U-shaped bent portion is easily deformed into opening and closing. By deforming, the lateral force is absorbed and damage to the suspension main body can be prevented.

In addition, the U-shaped bent portion is formed such that substantially the entire general shaft portion of the Panhard rod is offset downward from a straight line connecting both end attachment portions, so that the offset portion can be used to connect the protruding portion of the vehicle body panel, for example. Since the spare tire pan etc. can be avoided, the ground clearance of the vehicle body panel can be set lower.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

That is, FIG. 1 shows an axle-type suspension system 10 showing one embodiment of the present invention, in which the suspension system IO shows the rear wheel side which is of a rear-wheel drive type, and the left and right wheels 12.12a are used as axles. It is rotatably supported at both ends of the axle tube 14, and
The left and right wheels 12.degree. 12a are driven in conjunction with an axle shaft (not shown) housed within the axle tube 14.

The axle tube 14 has a pair of left and right lower links 16
．． 16a and a pair of left and right upper links 18.18a
The lower link 16 is connected to the front of the vehicle via
．． A pair of coil springs 20 arranged on 16a.
A vehicle body (not shown) is suspended via the axle tube 20a, and a shock absorber 22.
22a is arranged.

By the way, the axle tube 14 is moved back and forth in the vehicle by the lower link 16.16a and the upper link 18.
, 18a, a Panhard rod 24 is provided to prevent the axle tube 14 from moving in the left-right direction of the vehicle, and the Panhard rod 24 restricts the left-right movement.

The Panhard rod 24 is arranged in the left-right direction of the vehicle along the axle tube 14, and rubber bushings 26, 268 are provided at both ends thereof.
is the vehicle right end of the axle tube 14 on the rear side of the vehicle (
The rubber bushing 26a is rotatably attached to the vehicle body (the front side in the figure is the right side of the vehicle), and the other rubber bushing 26a is rotatably attached to the vehicle body.

Therefore, in this suspension system 10, when the axle tube 14 is moved up and down as the wheels 12, 12a bounce and rebound, the Banal robot 24 is allowed to move up and down with the rotation of the rubber bushes 26, 26a, and The movement of the axle tube 14 in the left-right direction of the vehicle is prevented by the compression rigidity and tensile rigidity of the Panhard rod 24.

In this embodiment, as shown in FIG. 2, a U-shaped bent portion 30 is formed at the center of the general shaft portion 24a of the banner rod 24, which is bent downward into a 0-shape. It is.

In the axle type suspension system IO of this embodiment, due to the above-mentioned second configuration, the axle tube 1 can be damaged due to a collision on the vehicle side.
When an excessive lateral force is input to the Panhard rod 24, this lateral force first acts on the Panhard rod 24 as a compressive force or a tensile force.

That is, when the above lateral force is input to the left wheel 12 side,
A tensile force acts on the Panhard rod 24, and when a lateral force is input to the right wheel 12a, a compressive force acts on the Panhard rod 24.

By the way, the Panhard rod 24 has a U-shaped bent part 3.
0, the U-shaped bent portion 30 is more easily deformed than the other general shaft portions 24a.

Therefore, when a lateral force input to the Panhard rod 24 is applied to the U-shaped bent portion 30, the U-shaped bent portion 30 is opened (deformed in the direction) and compressed against the tensile force. In response to the force, the U-shaped bent portion 30 is deformed in the closing direction, and by deforming the U-shaped bent portion 30 in this way, the lateral force input to the Panhard rod 24 is absorbed. Ru.

In this way, excessive lateral force is absorbed by the Panhard rod 24, so the lateral force acting on the main body portion of the suspension device 10 can be significantly reduced, and damage to the main body portion can be prevented. .

Therefore, after the collision occurs, only the deformed Panhard rod 24 needs to be replaced, and the main body of the suspension system is not damaged, making it possible to easily and inexpensively repair the accident.

FIG. 3 shows a Panhard rod 50 showing another embodiment, in which almost the entire general shaft portion 50a is offset P downward from the straight line connecting the rubber bushings 52, 52a at both ends. Accordingly, the U-shaped bent portion 5
4 is formed.

Therefore, in this embodiment, the deformation of the banner rono 50 is facilitated by excessive lateral force as in the above embodiment, and the spare tire pan 62 is protruded from the floor panel 60 in the direction F as shown in FIG. In this case, by arranging the mouth-shaped bent portion 54 so as to straddle the spare tire pan 62, the banner rod 50 is prevented from interfering with the spare tire pan 62.

Therefore, the height of the floor panel 60 can be made lower, and V7, y, ,',' l
'! - can be done.

In addition, by avoiding the spare tire pan 62 with the U-shaped bent portion 54, the rubber pushers at both ends of the banner groove 50 can be removed. The mounting point can be kept approximately horizontal, allowing suspension stability. -It is possible to eliminate the difference between the left and right sides of Lee.

Although this embodiment shows a case where the offset Pg at both ends of the Panhard rod 50 is made equal and the general shaft portion 50a and the straight line are made substantially parallel, the present invention is not limited to this (as shown in FIG. 5). The side that is attached to the vehicle body (rubber bushing 5)
By reducing the offset IP on the side (2a side) (and increasing the offset amount Pt on the side attached to the axle tube (rubber bushing 52 side), when the Panhard rod 50 is rotated about the rubber bushing 52a, The spare tire pan 62 can be effectively avoided by the U-shaped bent portion 54.

As described in detail of the invention, in the axle-type suspension system of the present invention, the general shaft part of Banal red that restricts the left-right movement of the axle is formed with a bent part. The bent portion is easily deformed when opened and closed (the U-shaped bent portion is deformed when an excessive lateral force is input).The lateral force is absorbed and the main body of the suspension system is damaged. can be prevented.

Therefore, for subsequent repairs, only the Panhard rod needs to be replaced, and this repair can be performed easily and inexpensively.

In addition, the U-shaped bent portion is formed such that substantially the entire general shaft portion of the Panhard rod is offset downward from a straight line connecting both end attachment portions, so that the offset portion can be used to connect the protruding portion of the vehicle body panel, for example. Since the spare tire pan etc. can be avoided, the ground clearance of the vehicle body panel can be set lower, and various excellent effects such as improving vehicle stability can be achieved.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing one embodiment of the present invention, FIG. 2 is an enlarged view showing one embodiment of the Panhard rod used in the present invention, and FIG. 3 is another panhard rod used in the present invention. FIG. 4 is a schematic view showing the attached state of the Panhard rod shown in FIG. 3, and FIG. 5 is an enlarged view showing still another example of the Panhard rod used in the present invention. 10...Axle suspension system, 12. I2a...wheel,
14...Axle tube (axle), 24.50...
・Panhard rod, 24a, 50a...general shaft part, 3
0.54...U-shaped bent part. Figure 2 Figure 3 Father 10 ------- One glaze and six evil devices 30 ------- tJ Ki-like white evil

Claims (2)

[Claims] (1) An axle-type suspension system that includes an axle that connects and supports the left and right wheels, and a Panhard rod that is arranged in the left-right direction of the vehicle and has one end attached to the axle and the other end attached to the vehicle body. An axle-type suspension device, characterized in that a U-shaped bent portion is formed in the general shaft portion of the Panhard rod. (2) The axle type according to claim 1, wherein the U-shaped bent portion is formed such that substantially the entire general shaft portion of the Panhard rod is offset downward from a straight line connecting both end attachment portions. Suspension system.