JPH09196101A - Strut type suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a sufficient distance between a vehicle body and a spring and to position the spring by forming an inner peripheral guide on the side opposite to a vehicle body of a spring seat and by positioning a coil spring end by an erecting flange and the inner peripheral guide. SOLUTION: When a wheel is at a neutral position, the center of turn of a spring seat 7 is at a position B at the height of a spring receiving surface because a turning shaft is slanted by the up and down positions of a strut-type suspension and has an offset F to the center A of outer peripheries S1, S2 of a flange 7d extending below and an erecting flange 7e. As a wheel is steered, the distance between the outer periphery S1 of the flange 7d extending below and a vehicle body 2 is reduced from D1 to D2 but, even if the wheel is steered to the maximum steering angle, the distance is sufficient and the flange 7d does not interfere with the vehicle body.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art FIG. 6 is a cross-sectional view (main part) of a typical conventional strut suspension system.
00 is a coil spring 1 sandwiched by a cylinder 101, a spring seat 103 attached to the cylinder 101 and having a raised flange portion 102 on the outer periphery, and the spring seat 103 and an unillustrated upper bracket.
04. Reference numeral 105 is a spring receiving surface. Reference numeral 106 is a vehicle body.

[0003]

FIGS. 7 (a) and 7 (b) are plan views showing the operation of the conventional strut type suspension system, FIG. 7 (a) showing the wheel in the neutral position, and FIG. 7 (b) showing the operation. Shows the steered state. In (a), the rotation center of the spring seat 103 of the strut type suspension device 100 is at the position B (indicated by ●) at the height of the rising flange portion 102 because the rotation shaft is inclined. Standing flange part 10
The center A (shown by ◯) of the outer circumference S of 2 is offset F
Having. At this time, the distance between the outer circumference S of the standing flange portion 102 and the vehicle body 106 is C1. In (b), when the wheels (not shown) are steered, the distance between the outer periphery S of the standing flange portion 102 and the vehicle body 106 is C1 due to the offset F.
To C2. The standing flange portion 102 and the vehicle body 1
The distance from 06 becomes small due to the expansion of the vehicle body width and the limitation of the distance between the left and right wheel centers, and there is a disadvantage that there is not a sufficient margin. An object of the present invention is to provide a strut-type suspension device that can secure a sufficient distance from the vehicle body when the wheels are steered and can position the spring with a simple configuration.

[0004]

In order to achieve the above object, the first aspect of the present invention is to provide a strut type suspension device in which the standing flange portion of the spring seat facing the vehicle body is eliminated, and the spring seat is provided. At least one inner peripheral guide portion is formed on the side opposite to the vehicle body, and the end of the coil spring is positioned by the rising flange portion and the inner peripheral guide portion. Since there is no standing flange portion on the vehicle body side, a sufficient distance can be secured between the vehicle body and the spring seat even during steering or the stroke of the suspension system. Further, since the coil spring is positioned by the rising flange portion and the inner peripheral guide portion, there is no fear of lateral displacement.

According to a second aspect of the present invention, in the strut type suspension device, the standing flange portion on the side of the spring seat facing the vehicle body is eliminated within an angle range of less than 180 °, and at least one of the spring seat and the side opposite to the vehicle body is provided. One inner peripheral guide portion is formed, and the end of the coil spring is positioned by the rising flange portion and the inner peripheral guide portion. Since there is no standing flange portion on the vehicle body side, a sufficient distance can be secured between the vehicle body and the spring seat even during steering or the stroke of the suspension system. Further, since the coil spring is positioned by the rising flange portion and the inner peripheral guide portion, there is no fear of lateral displacement.

According to a third aspect of the present invention, in the strut type suspension device, the standing flange portion of the spring seat on the side facing the vehicle body is eliminated within at least the maximum turning angle range at the time of turning, and the strut type suspension device is provided opposite to the vehicle body of the spring seat. At least one inner peripheral guide portion is formed on the side, and the end of the coil spring is positioned by the rising flange portion and the inner peripheral guide portion. Even if the steering is maximized, there is a sufficient distance between the vehicle body and the spring seat, and the coil spring is positioned by the upright flange portion and the inner peripheral guide portion, and will not be displaced.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a strut-type suspension device according to the present invention.
(Hereinafter referred to as "suspension device 1") includes a coil spring 12 that absorbs vertical movement of the wheel W, and an oil damper that appropriately suppresses vibrations generated at that time. Specifically, the oil damper is composed of a cylinder 5 and a rod 4, and the coil spring 12 is sandwiched between a spring seat 7 attached midway in the cylinder 5 and an upper bracket 8 attached to the rod 4. In addition, 2 is a vehicle body, 3 is an upper mount, 4a is an upper threaded portion of the rod 4, 4b is a nut, 6 is a supporting portion, 11 is a bump stopper, 13 is a dust cover, and L is a lower arm.

FIG. 2 is a perspective view of a spring seat of a suspension system according to the present invention. The spring seat 7 is a cylindrical portion 7a for welding and fixing to a cylinder 5 (see FIG. 1).
An upper taper portion 7b extending upward from the cylindrical portion 7a,
The spring receiving surface 7c formed on the upper taper portion 7b and almost 1 of the periphery of the spring receiving surface 7c.
A rising flange portion 7e formed by bending upward for a half circle portion, a falling flange portion 7d formed by bending downward for the remaining 1/2 circle portion of the peripheral edge, and an upper tapered portion 7b. The inner peripheral guide portions 7f, 7f are formed by cutting and raising the spring receiving surface 7c. In addition,
7g and 7g are open holes. The spring seat 7 is
Since the rising flange portion 7e or the falling flange portion 7d is provided on the periphery of the spring receiving surface 7c, the bending rigidity is large.

FIG. 3 is a plan view of the spring seat of the suspension system according to the present invention, in which the spring seat 7 is the vehicle body 2.
A falling flange portion 7d formed at an angle θ larger than the maximum turning angle of the wheel W (see FIG. 1) is provided outside the spring receiving surface 7c on the side facing (see FIG. 1). The angle θ larger than the maximum turning angle is less than 180 °.

The outer circumferences S1 and S2 of the falling flange portion 7d and the rising flange portion 7e are centered at A (indicated by a circle).
Is the arc of. Two inner peripheral guide portions 7f are provided on the side of the spring seat 7 opposite to the vehicle body 2 (see FIG. 1). In addition, at least one inner peripheral guide portion 7f may be provided.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, and the outer circumference S1 of the falling flange portion 7d is substantially equal to the outer diameter of the coil spring 12 shown by the imaginary line. Inner circumference guide part 7f
Wraps the end of the coil spring 12 with the upright flange portion 7e to prevent horizontal displacement. The falling flange portion 7d may be omitted.

The operation of the suspension system described above will be described below. 5 (a) and 5 (b) are plan views showing the operation of the suspension device according to the present invention, FIG. 5 (a) shows a state in which the wheels are in the neutral position, and FIG. In (a), the rotation center of the spring seat 7 of the suspension device 1 is B at the height of the spring receiving surface 7c because the rotation shaft is inclined due to the upper and lower support positions (not shown) of the strut type suspension device. Position (indicated by ●), and the falling flange portion 7d
And the center A of the outer circumferences S1, S2 of the standing flange portion 7e (○
Indicated by ) Has an offset F. At this time, the distance between the outer circumference S1 of the falling flange portion 7d and the vehicle body 2 is D1.

In (b), as the wheels W (see FIG. 1) are steered, the distance between the outer circumference S1 of the falling flange portion 7d and the vehicle body 2 is reduced from D1 to D2 due to the offset F, and the maximum steering is further performed. Even if you steer to the corner, there is enough distance,
There is no interference.

[0014]

The present invention has the following effects due to the above configuration. The strut-type suspension device according to claim 1 eliminates the standing flange portion of the spring seat on the side facing the vehicle body, and forms at least one inner circumferential guide portion on the side of the spring seat opposite to the vehicle body, thereby raising the standing flange portion. Since the coil spring end is positioned by the inner part and the inner guide part, there is no standing flange part on the vehicle body side, so the distance between the vehicle body and the spring seat is sufficient even during steering and stroke of the suspension system. It is kept and convenient. Further, the coil spring is positioned by the upright flange portion and the inner peripheral guide portion, and there is no fear of lateral displacement.

In the strut-type suspension device according to a second aspect of the present invention, the standing flange portion of the spring seat on the side facing the vehicle body has an angle of 1.
It should be eliminated within the range of less than 80 °, and at least one inner peripheral guide part should be formed on the side of the spring seat opposite to the vehicle body so that the end of the coil spring is positioned by the rising flange part and the inner peripheral guide part. Since there is no upright flange portion on the vehicle body side, the distance between the vehicle body and the spring seat can be sufficiently maintained even during steering and the stroke of the suspension device, which is convenient. Further, the coil spring is positioned by the upright flange portion and the inner peripheral guide portion, and there is no fear of lateral displacement.

According to another aspect of the present invention, in the strut type suspension device, the standing flange portion on the side of the spring seat facing the vehicle body is eliminated within at least the maximum turning angle range during steering, and the side of the spring seat opposite to the vehicle body. Since at least one inner peripheral guide portion is formed on the upper end and the coil spring end portion is positioned by the upright flange portion and the inner peripheral guide portion, even if the steering is maximized, the distance between the vehicle body and the spring seat is The coil spring is sufficiently positioned, and the coil spring is positioned by the rising flange portion and the inner peripheral guide portion, and is not displaced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a strut-type suspension device according to the present invention.

FIG. 2 is a perspective view of a spring seat of the suspension device according to the present invention.

FIG. 3 is a plan view of a spring seat of the suspension device according to the present invention.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a plan view showing the operation of the suspension device according to the present invention.

FIG. 6 is a cross-sectional view (principal part) of a conventional strut-type suspension device.

FIG. 7 is a plan view showing the operation of a conventional strut-type suspension device.

[Explanation of symbols]

1 ... Strut type suspension device, 2 ... Car body, 7 ... Spring seat, 7d ... Falling flange part, 7e ... Standing flange part, 7f ... Inner peripheral guide part, 12 ... Coil spring.

Claims (3)

[Claims] 1. A strut suspension having a spring seat for supporting an end of a coil spring,
This strut type suspension device eliminates the standing flange portion on the side of the spring seat facing the vehicle body, and forms at least one inner circumferential guide portion on the side of the spring seat opposite to the vehicle body, and the standing flange portion and the inner circumferential guide portion are formed. Strut-type suspension device characterized in that the ends of the coil springs are positioned by the parts. 2. A strut-type suspension device having a spring seat for supporting an end portion of a coil spring,
This strut type suspension device eliminates the standing flange portion of the side of the spring seat facing the vehicle body within an angle of less than 180 °, and forms at least one inner circumferential guide portion on the side of the spring seat opposite to the vehicle body, A strut type suspension device characterized in that an end portion of a coil spring is positioned by an upright flange portion and an inner peripheral guide portion. 3. A strut type suspension device having a spring seat for supporting an end portion of a coil spring,
This strut type suspension device eliminates the standing flange portion of the spring seat on the side facing the vehicle body within at least the maximum rotation angle range during steering, and at least one inner guide portion on the side opposite to the vehicle body of the spring seat. And a coil spring end portion is positioned by the upright flange portion and the inner peripheral guide portion.