JPH0624221A - Strut type suspension device - Google Patents

Abstract

PURPOSE:To divide the load on damper strut, downsize the damper strut itself, and lower its level by introducing such an arrangement that two damper structs are laid parallel while a certain gap reserved in between stretching in the running direction. CONSTITUTION:A damper strut arrangement is composed of two damper structs 7, 7 laid parallel with a certain gap reserved in between stretching in the running direction. A rotary joint 5 and a drive shaft are installed approx. in the middle between the two damper structs 7, 7. The rotary joint 5 is located over a knuckle, and a ball joint is installed under the knuckle. A king pin shaft penetrates these rotary joint 5 and ball joint.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to improvements in strut suspensions.

[0002]

2. Description of the Related Art A suspension system is also called a suspension,
It is located between the axle and the vehicle body, and has the role of connecting both and absorbing vibrations from the road surface to improve riding comfort.

FIG. 7 is a front view of a conventional strut type suspension device. This type of suspension device in which a damper constitutes a strut (support) is mounted on the wheel 102 driven by a drive shaft 101. Knuckle 103, damper strut 104 fixedly mounted on the upper part of this knuckle 103, upper mount 106 connecting this damper strut 104 to the vehicle body side, and ball joint 10 attached to the lower part of said knuckle 103.
7. The lower arm 108 connects the knuckle 103 to the vehicle body through the ball joint 107.
The damper struts 104 here refer to the oil dampers 104a combined with the springs 105.

The wheel 102 and the tire 110 move up and down around the base portion 108a of the lower arm 108. This movement is damped by the damper struts 104 and then transmitted to the vehicle body.

When the steering is turned, the damper pass struts 10 are used.
4, a so-called kingpin axis KL formed by connecting a vehicle body mounting center point C1 and a rotation center point C2 of the ball joint 107.
Rotate around. Specifically, a damper bearing 111 is provided between the upper mount 106 and the damper strut 104 on the vehicle body side.
1 rotates. The difference between the kingpin axis KL and the tire ground contact surface center C3 is referred to as the kingpin offset d, and the inclination of the kingpin axis KL with respect to the perpendicular passing through the tire contact surface center C3 is referred to as the kingpin inclination angle θ.

Further, the damper strut 104 is set at a considerably high position in order to avoid interference with the drive shaft 101.

[0007]

Drive shaft 10
If the damper struts 104 are set to a high position in order to avoid interference with the vehicle 1, the bonnet becomes high at the front and air resistance increases, and the indoor space and the trunk room space decrease at the rear.

In a steering strut type suspension system involving steering, whether or not steering is heavy / light and whether straightness is maintained without being taken by the steering wheel depends on the setting of the kingpin offset d and the kingpin inclination angle θ. Therefore, the setting of the kingpin axis KL is extremely important, but the design may be restricted in consideration of the shape of the engine room, the securing of the indoor space, the movement of the tires, etc. As a result, the steering wheel becomes heavy, etc. Inconvenience occurs.

That is, in the conventional steering strut type suspension device, there is a disadvantage in that the damper strut is at a high position and the degree of freedom in setting the kingpin axis is poor, and the steering strut type suspension system does not involve steering. In the rudder strut type suspension device, there is an inconvenience that the damper strut is at a high position, and measures for these are required.

[0010]

In order to solve the above-mentioned inconvenience, the present invention provides a wheel driven by a drive shaft, a knuckle for axially supporting the wheel, and a rotary joint provided on the upper part of the knuckle. A steering strut type suspension device is constituted by a damper strut attached to the rotary joint, a ball joint attached to a lower portion of the knuckle, and a lower arm connecting the knuckle to the vehicle body through the ball joint.

In this steering strut type suspension device,
Two damper struts, one damper strut and one springless damper, or one damper strut and one cylindrical slide mechanism, with damper struts arranged side by side along the direction of travel with a constant spacing. Configure and
These two damper struts, one damper strut and one springless damper, or 1
A kingpin shaft and a drive shaft are arranged in the approximate center of one damper strut and one cylindrical slide mechanism.

Alternatively, in a non-steering strut type suspension system in which a wheel is driven by a drive shaft but steering is not possible, two damper struts in which damper struts are arranged side by side at regular intervals along the traveling direction, It consists of one damper strut and one damper without spring, or one damper strut and one cylindrical slide mechanism, and these two damper strut, one damper strut and one spring are seen in a side view. No damper, or a drive shaft is arranged in the approximate center of one damper strut and one cylindrical slide mechanism.

[0013]

[Function] What used to be a single damper path strut
By using two damper struts or one damper strut and one damper without a spring, the load per one is halved and the height of the damper struts is lowered by straddling the drive shaft. You can Alternatively, by replacing the conventional one damper strut with one damper strut and one cylindrical slide mechanism, the height position of the damper strut can be lowered by straddling the drive shaft. .

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals.
FIG. 1 is a front view of a steering strut-type suspension device of the present invention. The steering strut-type suspension device 1 includes a wheel 3 driven by a drive shaft 2, a knuckle 4 for pivotally supporting the wheel 3, and a knuckle 4 for the wheel 3. A rotary joint 5 provided on the upper part of the rotary joint 5, a damper strut 7 attached to the rotary joint 5, an upper mount 8 for connecting the damper strut 7 to the vehicle body side, and a ball joint 9 attached to the lower part of the knuckle 4, The lower arm 10 connects the knuckle 4 to the vehicle body through the ball joint 9. The damper struts 7 are dampers 7 in this embodiment.
It is a combination of a and a spring 7b.

The rotary joint 5 is a shaft pin 11 penetratingly attached to the knuckle 4, and the inner ring 1 fitted to the shaft pin 11.
2, ball 13, ..., oil seals 14, 14
The knuckle 4 is rotatable with respect to the damper strut 7. That is, the line passing through the center of the shaft pin 11 and the center of the ball joint 9 becomes the kingpin axis KL.

FIG. 2 is a side view of FIG. 1, and the damper strut 7 of FIG. 1 is composed of two damper struts 7, 7 arranged in parallel in the traveling direction. Further, the rotary joint 5 is formed in a substantially central portion of a tie block (connecting member) 6 which is hung around the lower portions of the two damper struts 7, 7.

The operation of the steering strut type suspension device 1 having the above-mentioned structure will be described. In FIG. 1, the wheel 3 and the tire 15 move up and down around the base portion 10a of the lower arm 10. This movement is damped by the damper strut 7, and then transmitted to the vehicle body.

During steering, the knuckle 4, the wheel 3 and the tire 15 rotate around the kingpin axis KL.

Since the relative position between the kingpin axis KL and the damper strut 7 axis can be freely adjusted by the tie block 6, the kingpin inclination angle θ and the kingpin offset d can be freely set. In FIG. 2, β is a caster angle. Further, as shown in FIG. 2, since the number of the damper struts 7 and 7 is two, the size of the damper struts can be reduced and the position of the upper mount 8 is sufficiently small as compared with the case of the conventional one. Can be lowered. Furthermore,
As shown in FIG. 2, by separating the two damper struts 7, 7 from each other, the bottom portions 7 c, 7
Since 7c can be configured to straddle the drive shaft 2, the position of the upper mount 8 can be further lowered.

The use of two damper struts 7, 7 improves the torsional rigidity against the couple from the knuckle 4.

FIG. 3 is a perspective view according to the modified embodiment of FIG. 1, in which the lower arm 10 is divided into a front lower arm 10F and a rear lower arm 10R, and the front ball joint 9F and the rear ball joint 9R are respectively attached to the knuckle 4. It is characterized by being connected. In this configuration, the front lower arm 10F and the front ball joint 9F
In the action line L1 relating to the above, the action line L2 relating to the rear lower arm 10R and the rear ball joint 9R, the line connecting the intersection point (instantaneous center) C4 of the action line L1 and the action line L2 and the upper rotary joint 5 is the kingpin axis KL. Therefore, the setting of the kingpin axis KL becomes easier.

FIG. 4 is a diagram showing a modified embodiment of FIG.
One of the damper struts in the set is made up of only the damper 7a having no spring. The damper 7a may be changed to a cylindrical slide mechanism. 1
Vertical support member formed by arranging two spring damper struts 7 and one springless damper 7a, or vertical support formed by arranging one spring damper strut 7 and a cylindrical slide mechanism in parallel The member withstands couples with rudder angle as well as the device of FIGS. Moreover, the cost can be reduced and the weight can be easily reduced as compared with the apparatus shown in FIGS.

FIG. 5 is a front view of the non-steering strut type suspension device of the present invention, and FIG. 6 is a side view thereof. The non-steering strut type suspension device 21 includes a wheel 23 driven by a drive shaft 22, Knuckle 2 that supports wheel 23
4, a damper strut 25 (comprising a damper 25a and a spring 25b) fixedly installed on the upper portion of the knuckle 24, an upper mount 26 for connecting the damper strut 25 to the vehicle body side, and a pin attached to the lower portion of the knuckle 24. It comprises a joint 27 and a lower arm 28 connecting the knuckle 24 to the vehicle body via the pin joint 27.

As shown in FIG. 6, the damper pass struts 25,
25 is formed by arranging two lines in parallel. However, one of these damper struts 25, 25 is provided with a damper 25a without a spring.
It may be replaced with only the cylinder slide mechanism.

That is, since the non-steering strut type suspension device 21 of FIGS. 5 and 6 does not need to be steered, the upper rotary joint (reference numeral 5 in FIG. 1) is not necessary, and the lower ball joint ( The reference numeral 9) in FIG. 1 may be a simple pin joint 27 that allows swinging only in the vertical direction.

In the non-steering strut type suspension device 21 as well, the damping load can be reduced due to the effect of dividing the load which is obtained by using one damping strut as two damping struts 25, 25. By arranging so as to straddle the drive shaft 21, it is possible to expect an effect that the mounting position of the damper strut 25, 25 can be lowered.

[0027]

As described above, according to the present invention, in the steering strut type suspension device, the rotary joint is provided on the upper part of the knuckle,
Since the ball joints are arranged below the knuckle and the axis passing through the rotary joint and the ball joint is the kingpin axis, the kingpin axis can be set regardless of the damper struts.

Then, in the steering strut type suspension device, two damper struts, one damper strut and one springless damper, or one damper strut and 1 are arranged at a constant interval along the traveling direction. Two cylindrical slide mechanisms are installed side by side and these two damper struts, one damper strut and one springless damper, or one damper strut and one
Since the kingpin shaft and the drive shaft are arranged substantially in the center of the cylindrical slide mechanism of the book, the damper strut can be arranged so as to straddle the drive shaft, and in addition, since the load of the damper strut is divided, the damper strut itself can be miniaturized. It is possible to lower the height position of the damper path strut. By lowering the hood at the front, air resistance can be reduced, and at the rear, the interior space and trunk room space can be increased.

Also in the non-steering strut type suspension device, two damper struts, one damper strut and one springless damper, or one damper strut are kept at a constant interval along the traveling direction. And one cylindrical slide mechanism are arranged side by side, and these two damper struts, one damper strut and one springless damper, or one damper strut and one cylindrical slide mechanism are abbreviated in a side view. The damper strut can be arranged in the center so as to straddle the drive shaft, and in addition, since the load of the damper strut is divided, the damper strut itself can be downsized, and therefore the height position of the damper strut can be lowered. It is possible to increase indoor space and trunk room space.

Further, by replacing the damper strut composed of the damper and the spring with a damper without a spring or a cylindrical slide mechanism, the cost can be reduced and the weight can be easily reduced.

[Brief description of drawings]

FIG. 1 is a front view of a steering strut type suspension device of the present invention.

FIG. 2 is a side view of a steering strut type suspension device of the present invention.

FIG. 3 is a perspective view according to a modified embodiment of FIG.

FIG. 4 is a modified embodiment diagram of FIG.

FIG. 5 is a front view of the non-steering strut suspension system of the present invention.

FIG. 6 is a side view of the non-steering strut suspension system of the present invention.

FIG. 7 is a front view of a conventional strut-type suspension device.

[Explanation of symbols]

1 ... Steering strut type suspension device, 2 ... Drive shaft, 3 ... Wheel, 4 ... Knuckle, 5 ... Rotating joint, 6 ...
Tie block, 7 ... Dampus struts, 7a ... Damper,
7b ... Spring, 9 ... Ball joint, 10 ... Lower arm, 21 ... Non-steering strut type suspension device, 22 ... Drive shaft, 23 ... Wheel, 24 ... Knuckle, 2
5 ... Dampus struts, 25a ... Dampers, 25b ... Springs, 27 ... Pin joints, 28 ... Lower arms, KL ... King pin shafts.

Claims (2)

[Claims] 1. A wheel driven by a drive shaft, a knuckle for axially supporting the wheel, a rotary joint provided on an upper portion of the knuckle, a damper path strut attached to the rotary joint, and a lower portion of the knuckle. A strut-type suspension device including a ball joint attached to the vehicle and a lower arm that connects the knuckle to the vehicle body through the ball joint, and is capable of steering around a kingpin axis passing through the rotary joint and the ball joint. In the above, the damper struts are two damper struts arranged in parallel at a constant interval along the traveling direction,
It consists of one damper strut and one damper without spring, or one damper strut and one cylindrical slide mechanism. These two damper strut, one damper strut and one spring are seen from the side. A strut-type suspension device in which the rotary joint and the drive shaft are arranged substantially at the center of a damper or a damper strut and a cylindrical slide mechanism. 2. A wheel driven by a drive shaft, a knuckle pivotally supporting the wheel, a damper strut attached to an upper portion of the knuckle, a pin joint attached to a lower portion of the knuckle, and the pin joint. It consists of a lower arm that connects the knuckle to the vehicle body via
In a non-steering strut type suspension device that cannot be steered, the damper struts are two damper struts arranged side by side at a constant interval along the traveling direction, one damper strut and one spring It consists of a damper or one damper strut and one cylindrical slide mechanism, and these two damper strut in side view,
A strut-type suspension device characterized in that a drive shaft is arranged substantially at the center of one damper strut and one damper without a spring, or one damper strut and one cylindrical slide mechanism.