JPS6015687Y2 - Axle beam suspension system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspension system referred to as a floating axle type or an axle beam type.

The axle beam provided in an axle beam type suspension system that is structured to remove part or all of the external load applied to the drive axle has an open cross-sectional shape so as not to impair suspension performance.

On the other hand, in this suspension system having an axle beam, a stabilizer bar is built into the axle beam in order to suppress the roll of the vehicle, and is configured to bear part of the torsional rigidity based on the roll.

However, if the torsional rigidity of the stabilizer bar is too high, the rigidity of the axle beam will increase, approaching the characteristics of a vehicle with a rigid axle, resulting in poor ground contact and ride comfort when driving on rough paved roads or cobblestone roads. It has a negative effect on sexuality.

On the other hand, if the torsional rigidity of the stabilizer bar is too small, there is a risk that the stabilizer bar will not achieve its original function when turning or the like.

Therefore, the present invention was developed to create an axle that secures ground contact and ride comfort by keeping the torsional rigidity of the stabilizer bar low in response to relatively small inputs, while ensuring sufficient torsional rigidity in response to large inputs such as when turning. The purpose is to provide a beam type suspension device.

The present invention provides an axle beam having an open cross-section shape with end plates fixed to both ends, and an axle beam provided within the axle beam with one end fixed to the one end plate and the other end fixed to the other end. a stabilizer bar rotatably supported by a plate; a lock plate fixed to an end of the stabilizer bar rotatably supported by an end plate; and an end located opposite from or to the lock plate. A pin protruding from a plate, and a pin provided on an end plate or lock plate located opposite to the pin, engaged with the pin, and allowing relative movement between the lock plate and the end plate within a certain range, but beyond that range. It is characterized in that it includes a long hole that restricts movement.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the suspension system of the present invention is a well-known axle beam type suspension system including an axle beam 10 and a stabilizer bar 12 built into the axle beam 10 and extending in the same direction as the axle beam. It is structured as follows.

The axle beam 10 is fixed to a pair of swing arms 14 at its intermediate portion, and the swing arms 14 are suspended on the vehicle body.

The axle beam 10 is formed in an open cross-sectional shape with the lower end 11 open, and end plates 16 and 18 are provided at both ends.
is fixed.

A wheel support is attached to this end plate,
Support the wheels.

Conventionally, both ends of the stabilizer bar 12 were fixed to the end plates 16 and 18, respectively, but in the present invention, the stabilizer bar 12 is fixed at the end on the blade side, for example, on the end plate 16 side. Although it is fixed to the end plate 16, the other end 13 is rotatably supported by the end plate 18 as shown in FIG.

The end portion 13 of the stabilizer bar 12 is connected to the end plate 1
8 through the through hole 19 provided in the end plate 1.
A lock plate 20 is fixed to a portion of the stabilizer bar 12 that is guided to the outside of the stabilizer bar 8 and located outside the end plate 18.

As shown in FIG.
On the other hand, a pin 24 is provided to protrude toward the lock plate 20 from the end plate 18 located opposite to the lock plate 20, and is engaged in the elongated hole 22.

The pin 24 and the elongated hole 22 are designed to prevent the stabilizer bar 12 from being subjected to torsional torque.
Therefore, when the lock plate 20 is in a stationary neutral position relative to the end plate 18, the pin 24 is in the elongated hole 2.
2 and are mutually positioned so as to be located at the center of the two.

Then, from this position to one side during the angle φ12, pin 2
4 can freely move within the elongated hole 22, and therefore the lock plate and the end plate can rotate relative to each other.

This means that the lock plate 20 and the stabilizer bar 1
2 are fixed to each other, and the stabilizer bar 12 is rotatably supported by the end plate 18, which means that the stabilizer bar 12 can rotate relative to the end plate 18.

In other words, the angle φ is within a range where the stabilizer bar 12 remains in a free state and does not achieve its original function even if a torsional torque is applied to the stabilizer bar 12.

When the above structure is installed in a vehicle body and put into use, characteristics as shown in FIG. 4 are obtained.

If relative torsion acts on the bracket 16 and bracket 18 and the torsional torque when both are displaced by 0 torsional angle is T, then when θ is smaller than φ12, the spring torque T is also small, and during this time the axle The beam 10 functions as a stabilizer bar.

However, when the torsion angle θ reaches ψ12, the pin 24 hits the wall on one end side of the elongated hole 22, so that the lock plate 20 and the end plate 18 can no longer rotate relative to each other, and both become fixed. , twist angle θ
The torsional torque T rapidly increases due to the increase in , and the stabilizer bar 12 is elastically deformed by this torsional torque T, and the deformation energy at that time causes the end plate 16.18 to rotate in a direction to eliminate the twist. The original function of the stabilizer bar is achieved.

Therefore, even if the stabilizer bar itself has high torsional rigidity, by appropriately setting the angle φ, it is possible to secure a non-operating area for the stabilizer bar, which improves ground contact and ride comfort even when driving on rough paved roads or cobblestone roads. It can be expected to improve performance, and it also keeps the vehicle stable even when turning.

In the above example, a long hole was provided in the lock plate 20 and a pin was provided in the end plate 18 facing the lock plate 20, but on the contrary, a pin was provided in the lock plate 20 and a long hole was provided in the end plate 18. It's okay.

In this case, the elongated hole provided in the end plate 18 may be in the form of an elongated groove and may not penetrate through the elongated hole.

゛・Furthermore, the lock plate 20 is the end plate 18.
The stabilizer bar may be fixed to the end 13 of the stabilizer bar so as to face the end plate 18 inside the stabilizer bar.

If an elastic body such as rubber is interposed between the pin 24 and the elongated hole 22 and the pin presses this elastic body to deform it, the initial twist as shown by the broken line in FIG. It can be configured to gradually produce a stabilizer effect from different angles.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of the axle beam type suspension system of the present invention, FIG. 2 is a partially cutaway view taken from the direction of the arrow 2 in FIG. The side view of FIG. 4 is a characteristic graph showing the correlation between the twist angle and the twist torque during use. 10: Axle beam, 12 stabilizer bar, 16
．． 18: End plate, 20: Lock plate, 22
: Long hole, 24: Pin.

Claims (1)

[Scope of utility model registration request] an axle beam having an open cross-sectional shape with end plates fixed to both ends; and an axle beam provided within the axle beam, with one end fixed to the one end plate and the other end rotating to the other end plate. a lock plate fixed to an end of the stabilizer bar rotatably supported by an end plate; and a lock plate protruding from the lock plate or from an end plate located opposite to the lock plate. A pin is provided on the end plate or lock plate located opposite the pin, and is engaged with the pin, and allows relative rotation between the lock plate and the end plate within a certain range, but rotation beyond that range is prohibited. an axle beam type suspension system including a restraining slot;