JPS6325113A - Suspension for automobile - Google Patents

Abstract

PURPOSE:To simplify and miniaturize a structure by, as for a wishbone suspension, fixing the lower end portion of a strut to the upper end portion of a knuckle and at the same time fitting rotatably one end of an upper arm to the lower end portion. CONSTITUTION:The lower end of a strut 23 is fixed to the upper end of a knuckle 22 supporting rotatably an axle 2, and the strut-end-side portion of an upper arm 25 is coupled turnably to the lower part 23a of a spring seat 24 and its opposite side is assembled into a car-body. Also, a lower arm 26 is coupled to the lower end of the knuckle 22. By this constitution, lateral rigidity is supported with the upper arm 25 and the lower arm 26, and therefore necessary rigidity can be secured even if the strut 23 is fitted with a soft rubber bush, and a larger camber change is possible through the miniaturization of the knuckle.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a suspension system for an automobile that constitutes a wishbone suspension in a very simple manner.

(Prior Art) As a simple suspension system for an automobile, there is a MacFarnon strut 1, as shown in FIGS. 6 and 7. This McFarnon strut 1 has the lower end of the strut 4 fixed to the upper end of the knuckle 3 that rotatably supports the axle 2, the upper end of the strut 4 is attached to the vehicle body side, and the lower arm 5 is connected to the lower end of the knuckle 3. The tire wheel 6 attached to the axle 2 transmits the behavior according to the unevenness of the road surface from the tire 7 in contact with the ground to the strut 4 via the axle 2 and knuckle 3. In comparison, there is a double wishbone 8 as shown in FIG. 8, which is a little more complicated. This double wishbone 8 is
The upper arm 11 is attached to the upper end of a knuckle 10 that rotatably supports the axle 9, the lower arm 12 is attached to the lower end of the knuckle 10, the lower end of the strut 13 is attached to the knuckle side end of the lower arm 12, and the strut 13 is attached to the lower end of the knuckle 10.
The upper end is attached to the vehicle body O (Problem to be solved by the invention λ) In the conventional suspension system described above, the MacPherson strut is small. Shbone 8 is advantageous, but unless the span of the upper arm 11 and lower arm 12 is widened, the camber change in response to lateral force will become large. There was a problem in that the lower end of the strut was connected to the upper end of the knuckle, and the upper end of the strut was connected to the upper end of the knuckle. To provide a suspension system for an automobile which solves the above-mentioned problems by providing a connecting part with the arm and attaching an upper arm to form a double wishbone type suspension system which has a simple structure and is miniaturized.

(Means for Solving the Problems) The present invention, as a means for solving the above-mentioned problems, provides a suspension system for an automobile in which the lower end of the strut is fixed to the upper end of the knuckle. , one end of the upper arm is rotatably attached to the lower end of the strut to form a double wishbone type suspension device.◇ (Function) In addition to the above structure, the present invention allows the knuckle to be enlarged. It is possible to form a double wishbone type suspension system with a simple structure without any need for a suspension system, and it also allows for a greater degree of freedom in changing the camber compared to the McFarnon strut type suspension system, resulting in better first-riding comfort. and cost reduction.

(Embodiment) The following is a detailed explanation of the present invention. As shown in FIG.
The lower end of the strut 23 is fixed and integrated with the upper end of the knuckle 22, and the strut side end of the upper arm 25 is rotated to the lower part 23a of the spring seat 24 assembled to the strut 23. The opposite end is attached to the vehicle body attachment part (not shown), the knuckle side end of the lower arm 26 is rotatably connected to the lower end of the knuckle 22, and the opposite end is attached to the lower end of the knuckle 22. It is formed by being assembled to the vehicle body side mounting part (not shown).

The upper end portion 23b of the strut 23, which is integrally connected to the knuckle 22, is made of a flexible material such as a rubber split shock absorbing component with soft spring characteristics so that it can move relatively freely between it and the vehicle body side mounting portion (not shown). Attach via a suitable member.

As shown in FIG. 2, the connecting portion between the strut 23 and the upper arm 25 is formed by providing a groove (not shown) on the outer periphery of the lower part 23aK of the spring seat 24 of the strut 23, and inserting the axis A into the groove. A ring 27 is fitted around the center so as to be slidable in the circumferential direction, and one end of an upper arm 28 having a U-shaped planar shape is attached to the ring 27 with an axis B perpendicular to the axis A of the strut 23.
The upper arm 25 is supported rotatably around the upper arm 25.
A steering side suspension system can be formed by pivoting the other end toward the vehicle body so as to be rotatable around an axis C parallel to the axis B.0 When steering is not required, the lower end portion 23a and the ring 2
7 may be fixed and integrated 0 Also, the upper end portion 23 of the strut 23 attached to the vehicle body side
If the movement of b can be large, as shown in FIGS. 5 and 4, the spring seat 24 of the strut 26
A protrusion 29 is provided at the lower part 23a of the
A threaded mounting hole 30 is drilled parallel to the threaded mounting hole 30.
Upper arm 3 with a pole joint at one end
1 may be screwed together. The upper arm 31 has a threaded portion 32 at one end on the end side that is screwed into the threaded mounting hole 30.
A mounting hole 34 is formed at the opposite end for attaching a coupling member having a pole 33 formed at the other end so as to be rotatable about an axis perpendicular to axis A. do.

When this embodiment is used, unlike the strut type, the lateral rigidity is supported by the upper arm 25 and the lower arm 26, so the necessary rigidity can be secured, and the use of cushioning parts such as sufficiently soft rubber bushings The strut 23 can be attached to the vehicle body. For this reason, if you want to increase the camber change Dc by just one degree regardless of the strut type, as shown in Figure 5, the dimension from the lower end of the knuckle 22 to the upper end of the strut 23 When the distance is 500 stitches (mm), the moving distance t of the attachment point at the upper end 23b of the strut 23 is 1 = 500Xsin1° = a7 (■) (1), and the large and soft bush By using this, the size can be kept within the absorbable range, making it possible to put it into practical use.

As described above, in the present invention, a double wishbone type suspension system can be constructed with a simple structure, and even if the span of the upper arm 25 and the lower arm 26 is widened, the knuckle 22 does not need to be enlarged. Flexible rubber shock absorbing parts can be used, and the vibration absorption performance of MacPherson strut type suspension systems is also improved.

(Effects of the Invention) As described above, the present invention provides a McFarnon strut type by fixing the lower end of the strut to the upper end of the knuckle and rotatably attaching one end of the upper arm to the lower end of the strut. A double wishbone type suspension system with a simple structure similar to a suspension system can be formed, and even if the span of the upper and lower arms is widened to increase the camber change, the knuckle does not need to be enlarged, making it more compact. and cost reduction.

Furthermore, an elastic member with soft spring characteristics can be used at the mounting portion of the strut on the vehicle body side, and the cushioning effect of the McFarnon strut type suspension system is also improved.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view showing a suspension device according to the present invention, and FIG. 2 is a perspective view showing a connecting portion between a strut and an upper arm of the suspension device according to the present invention. FIG. 5 is a perspective view showing another aspect of the connecting portion between the strut and the upper arm of the suspension system according to the present invention; FIG. 4 is a vertical cross-sectional side view of the upper arm in FIG. 3; FIG. 5 is according to the present invention. FIG. 3 is a side explanatory diagram showing the behavior of the suspension system. FIG. 6 is an explanatory side view showing a conventional McFarnon strut type suspension system. Fig. 7 is a side explanatory view showing the behavior of a conventional McFarnon strut type suspension system, and Fig. 8 is a side explanatory view showing a conventional double wishbone type suspension system. Knuckle 23... Strut 23a... Lower part 23 of the strut spring seat
b...Top end of strut 25...Upper arm 26...Lower arm Patent applicant Suzuki Motor Co., Ltd. agent Patent attorney Yumi Kaede Soto 2 Meiga 1 Izuga 3. 2 figures! Sai 4 Tuga 5 drawing c Off drawing c Fang 8 Fang 6 drawing

Claims (1)

[Claims] (1) An automobile characterized in that the lower end of the strut is fixed to the upper end of the knuckle, and one end of the upper arm is rotatably attached to the lower end of the strut to form a double wishbone suspension system. Suspension system.