JP2000103215A - Strut suspension of automobile suspension system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust a car height as well as to adjust the car height to an optional height. SOLUTION: A coil spring is arranged between a spring lower seat 10 movable in the lengthwise direction to a strut sheel case 1 and a spring upper seat arranged above a shock absorber. A bolt arranged in the spring lower seat 10 is engaged with the groove part formed in the lengthwise direction in the outer peripheral part of the strut sheel case 1, the lower seat 10 is positioned in the lengthwise direction by a double nut threadedly engaging with the outer peripheral part of the strut shell case 1, and a lengthwise directional position of a nut is adjusted to thereby adjust a car height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strut suspension for a vehicle suspension.

[0002]

2. Description of the Related Art Various types of suspension systems for automobiles have been proposed. FIG. 5 is an external perspective view of a strut suspension of a suspension system of a type capable of adjusting the vehicle height. In the strut shell case 1, a shock absorber 2 is provided so as to be movable in the length direction (the height direction of the vehicle). A male screw portion 3 is formed on the outer periphery of the strut shell case 1, and a spring lower seat 4 is provided.
Are screwed into the male screw portion 3. A spring upper seat 8 is attached to the upper part of the shock absorber 2.
A coil spring 7 is disposed between the coil spring 7 and the spring lower seat 4, and biases the spring in a direction in which the shock absorber 2 and the case 1 expand.

[0003] As shown in FIG.
The lock nut 5 is screwed into the spring lower seat 4
By turning the lock nut 5 in the length direction while turning the lock nut 5 and tightening the lock nut 5 to the spring lower seat 4 like a double nut, the pressurization of the coil spring 7 is adjusted to be high or low. The height of the can be adjusted.

[0004] As shown in Fig. 4, the coil spring 7 is formed such that the upper winding shape of the coil is a perfect circle with respect to the center of the shock absorber 2, but the lower winding shape is eccentric (offset amount C>). D) and thus also the coil spring 7 which also carries the spring lower seat 4
Is formed in a shape that matches the eccentric shape of the lower part of. And the spring lower seat 4 has a point A on its long axis side.
Is aligned with the center B of the bracket 6 of the case 1 in the screw rotation direction.

[0005]

In such a strut suspension, when the height of the spring lower seat 4 is to be adjusted, the point A is located at the center B of the case 1.
However, since the spring lower seat 4 is eccentric with respect to the center of the shock absorber, a space around the strut suspension allows a 360-degree rotation of the spring lower seat 4 depending on the installed vehicle. May not be possible.

In this case, the height of the spring seat 4 must be adjusted by removing the suspension device from the vehicle, and there is a problem that it takes a long working time.

In the height adjustment, since the point A of the spring lower seat 4 must be aligned with the center B of the case 1, adjustment can be made only for each pitch of the screw, and no adjustment can be made during that time.

An object of the invention according to the present application is to provide a strut suspension of a vehicle suspension device which can easily adjust the vehicle height while the suspension device is mounted on a vehicle and can adjust the vehicle height to an arbitrary height. It is assumed that.

[0009]

According to a first aspect of the present invention, a shock absorber is slidably provided in a strut shell case along a longitudinal direction thereof, and the shock absorber is provided in the strut shell case. A coil spring is provided between a spring lower seat movable in the length direction and a spring upper seat provided on an upper portion of the shock absorber, and the spring lower seat is extended around an outer peripheral portion of the strut shell case. The rotation of the strut shell case is restricted by an engaging member that engages with a groove formed along the longitudinal direction, and positioning in the longitudinal direction is performed by contact with a nut screwed to the outer peripheral portion of the strut shell case. The height of the vehicle can be adjusted by adjusting the position in the length direction of the vehicle.

In a second configuration for realizing the object of the invention according to the present application, the nut is a double nut.

According to a third configuration for realizing the object of the invention according to the present application, the engaging member is a bolt member that is screwed to the spring lower seat and a front end portion is engaged with the groove. Thus, the spring lower seat can be fixed to the strut shell case.

[0012] In a fourth configuration for realizing the object of the invention according to the present application, the coil spring is configured such that a winding shape of a lower coil is eccentric with respect to a center of the spring, and the spring lower seat is provided at a lower end of the spring. It is formed according to the shape.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
Shown in

In the present embodiment, the external thread portion 3 is formed on the outer peripheral portion of the strut shell case 1, but the spring lower seat 10 does not have an internal thread portion to be screwed with the external thread portion 3. The vertical movement and the circumferential movement of the strut shell case 1 are freely covered.

However, since the spring lower seat 4 needs to have its longitudinal end A aligned with the bracket center B of the strut shell case 1, in the present embodiment, the spring lower seat 4 The groove 1a is formed in the direction, and a bolt 10b as an engaging member is attached to a bolt hole 1a formed in the radial direction in the spring lower seat 4, and the bolt 10b is engaged with the groove 1a.

Accordingly, the spring lower seat 4 can be moved up and down with the tip A in the long axis direction coinciding with the bracket center B of the strut shell case 1, but the movement in the rotation direction is restricted. Will be. When the position in the vertical direction is determined, when the bolt 10b is tightened, the spring lower seat 4 is fixed at that position without play.

The spring lower seat 4 cannot receive the spring force of the coil spring 7 (FIGS. 4 and 5) that is elastically mounted only in this fixed state. In this embodiment, the spring lower seat 4 can be fixed to the position without being loosened by the double nuts of the two nuts 11 and 12 in this embodiment without being shifted downward.

Therefore, since the height of the spring lower seat 4 can be adjusted without removing the suspension device, the work of adjusting the height is facilitated.

Further, since the spring lower seat 4 can be positioned at an arbitrary height, precise adjustment of the vehicle height becomes possible.

Incidentally, a key may be used as the engaging member instead of the bolt 10b.

[0021]

As described above, according to the present invention, since the height of the spring lower seat can be adjusted without removing the suspension device, the height adjustment work is facilitated.

Further, since the spring lower seat can be positioned at an arbitrary height, precise adjustment of the vehicle height becomes possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a strut suspension showing a position embodiment of the present invention.

FIG. 2 shows the spring lower seat of FIG. 1;
Is a top view, (b) is a side view

FIG. 3 is a cross-sectional view of a conventional strut suspension.

4A and 4B show a strut suspension spring, wherein FIG. 4A is a top view and FIG. 4B is a side view.

FIG. 5 is an external perspective view of a conventional strut suspension.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Strut shell case 1a Groove part 2 Shock absorber 3 Male screw part 6 Bracket 7 Coil spring 8 Spring upper seat 10 Spring lower seat 10a Screw hole 10b Bolt 11, 12 Nut

Claims (4)

[Claims] A shock absorber is provided in a strut shell case so as to be slidable along a length direction, and a spring lower seat movable in a length direction with respect to the strut shell case, and provided on an upper portion of the shock absorber. A coil spring is provided between the spring upper seat and the spring lower seat, and the rotation of the spring lower seat is regulated by an engagement member that engages with a groove formed along a length direction on an outer peripheral portion of the strut shell case. The longitudinal position is determined by contact with a nut screwed to the outer peripheral portion of the strut shell case, and the height of the vehicle can be adjusted by adjusting the longitudinal position of the nut. A strut suspension for a vehicle suspension system, characterized by the following. 2. The strut suspension according to claim 1, wherein the nut is a double nut. 3. The engaging member is a bolt member which is screwed to the spring lower seat and has a tip portion engaged with the groove, and the spring lower seat can be fixed to the strut shell case by screwing. The strut suspension for a vehicle suspension according to claim 1 or 2, wherein 4. The coil spring according to claim 1, wherein a winding shape of a lower coil is eccentric with respect to a center of the spring, and the spring lower seat is formed according to a shape of a lower end of the spring. Terms 1, 2
Or a strut suspension of the vehicle suspension according to item 3.