JPS6218759Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration isolating rubber used in a strut-type suspension system of an automobile.

A conventional strut-type suspension device is as shown in Fig. 1, in which A is a vibration-proof rubber, which is disposed coaxially with a cylindrical inner tube fitting 1 having a stepped portion A on the lower side, and a rubber plate on the outside. Horizontally extending flange part RO, RO′
A cylindrical rubber block 3 is integrally vulcanized and bonded between the outer cylindrical metal fittings 2 and 2', which are formed by abutting the outer cylindrical parts 2 and 2'.

A bearing 4 is interposed by caulking in the step part A of the inner cylindrical metal fitting 1, and the tip of a piston rod 5 extending from the damper that supports the wheel is pivotally supported on the bearing 4. Bolts 6 are installed in the flange portions R and R' of the cylindrical fittings 2 and 2', and the vibration isolating rubber body A is fixed to the vehicle body side (not shown) using the bolts 6. .

In the vibration isolating rubber for a strut-type suspension having the above structure, the cylindrical rubber block 3, which is the vibration isolating rubber, has both inner and outer peripheral surfaces vulcanized and bonded to the inner and outer cylindrical fittings 1, 2, and 2'. Moreover, since the upward and downward (arrow direction) loads applied to the piston rod 5 act as a complete shearing load, combined with the absence of a stopper, a large displacement must be allowed, and for this reason, the cylindrical shaped rubber block 3 and inside,
Adhesive peeling occurred between the outer cylinder fittings 1, 2, and 2',
Alternatively, if the cylindrical rubber block 3 is completely broken, there is a risk that the piston rod 5 supporting the wheel will come off from the suspension system, resulting in a serious accident.

The present invention was developed under the above circumstances, and its gist is that the cross section U
Two pieces of metal fittings each having an annular rib in the shape of a letter are joined by butting their seat plates against each other, and an annular cavity with an oval cross section is provided on the outer periphery, and an outer surface with a large area in the vertical direction. There is an inner metal fitting having an inner circumferential surface, and an annular rubber block having a substantially rectangular cross section is integrally vulcanized and bonded to cover the outer surface and top surface of the metal fitting. Two annular metal fittings each having an L-shaped cross section at the top and a flange portion extending outward from the vibration isolating member, each having a small convex portion cut out in an annular shape, are placed opposite each other, and the flange portions are punched. The structure is such that they are housed under strong pressure in an annular housing having a U-shaped cross section and formed by joining together.

Next, this will be explained in detail according to the drawings.

2 and 3 show the vibration isolating member B. FIG. 10 in the diagram
is an inner metal fitting, and this inner metal fitting 10 is formed by joining two pieces of metal fittings. Each metal fitting has an annular rib 13 having a U-shaped cross section and extending from the outer peripheral end of a disk-shaped seat plate 12 having a through hole 11 at the center.

Therefore, the inner metal fitting 10 is made by forming two metal fittings having the above-mentioned shape, abutting the seat plates 12 of the two metal fittings, and joining them by means such as welding, and attaching the outer peripheral end of the disk-shaped seat plate 12 to the annular shape having an oval cross section. It has a cavity 14.

Reference numeral 15 denotes an annular rubber block, which has a substantially rectangular cross section and is integrally vulcanized and bonded so as to cover the outer surface C and top surface D of the inner metal fitting 10.
Further, reference numeral 16 denotes a small convex portion, which is provided in an annular shape on the inner peripheral surface of both ends of the annular rubber block 15, and the top portion is cut off.

FIG. 4 shows a vibration isolating rubber for a strut-type suspension system according to the present invention.

Reference numeral 20 is an annular metal fitting having an L-shaped cross section and a flange extending outward at the top.

Therefore, two annular metal fittings 20 as described above are arranged opposite to each other, and the flange portions H and H'
The vibration isolating member B is placed under strong pressure inside the annular housing C having a U-shaped cross section by butt-joining the parts.
It has a configuration that allows it to be accommodated. At this time, vibration isolating member B
A small gap 21 is formed between the annular housing C and the top surface of the small convex portion 16 whose top portion is cut off.

Numerals 6 in the figure are bolts, which are installed in the flange portions H and H' of the annular metal fitting 20 that constitutes the housing C, and are used to attach the anti-vibration rubber to the vehicle body, although they are not shown. be.

Although not shown, the tip of the piston rod that extends from the damper that supports the wheel is connected to the inner metal fitting 1.
It is connected to a through hole 11 provided at the center position of 0.

The vibration isolating rubber for a strut-type suspension system of the present invention has a small convex portion 16 with the top cut off at the inner peripheral surface position of the annular rubber block 15 of the vibration isolating member B, and between the top surface and the housing C. Since the small gap 21 is provided, the deflection δ due to the upward and downward loads W from the piston rod exhibits good non-linearity as a spring characteristic of the vibration isolating rubber for the suspension system, as shown in FIG. In order to fix it to the outer metal fitting, it is housed in an annular housing C having a U-shaped cross section, and since it is attached without adhesive, there is no risk of adhesive peeling and good durability is maintained.

Further, the inner metal fitting 10 of the vibration isolating member B that connects the tip of the piston rod that supports the wheel is provided with an annular rib 13 having a U-shaped cross section on its outer periphery, and when two such metal fittings are brought together, An annular cavity 14 having an oval cross section is provided at the outer periphery, thereby forming an outer surface C having a large area in the vertical direction.

As a result, when a vibration load (vibration load in the longitudinal and lateral directions of the car) is input in the direction perpendicular to the axis through the piston rod while the car is running, the outer surface of the inner metal fitting 10 becomes larger than the cylindrical rubber block 15. The rubber block 15 forms a pressure-receiving area, and cooperates with the outer annular metal fitting 20 to help the rubber block 15 exhibit a stiff spring constant, contributing to the running stability of the automobile.

Furthermore, since the ribs 13 of the inner metal fitting 10 are formed so as not to come off from the cylindrical housing C, there is absolutely no possibility that the piston rod supporting the wheel will come off from the suspension system and cause a major accident.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view explaining a conventional example;
Figure 3 shows the vibration isolating member that composes the present invention.
3 is a plan view, FIG. 4 is a longitudinal sectional view showing the invention, and FIG. 5 is a diagram showing the spring characteristics of the invention. 1... Inner cylinder metal fitting, 2, 2'... Outer cylinder metal fitting, 3...
...Rubber block, A...Vibration isolation rubber, 4...Bearing, 5...Piston rod, 6...Bolt, B
... Vibration isolation member, 10 ... Inner metal fitting, 11 ... Through hole, 12 ... Disc-shaped seat plate, 13 ... Annular rib,
14... Annular hollow part, 15... Annular rubber block, 16... Small convex part, C... Annular housing, 20... Annular metal fitting, 21... Small gap part.

Claims (1)

[Scope of utility model registration request] An outer periphery formed by joining two metal fittings each having an annular rib with a U-shaped cross section extending from the outer periphery of a disk-shaped seat plate with a through hole in the center, and joining the seat plates against each other. An inner metal fitting is provided with an annular hollow portion having an oval cross section, and has an outer surface having a large area in the vertical direction, and a circular ring rubber block having a substantially rectangular cross section is provided to cover the outer surface and top surface of the metal fitting. A cross section L having a vibration isolating member integrally vulcanized and bonded and having a flange portion at the top that extends outward, and has a small convex portion cut off at the top at both ends of the inner circumferential surface of the annular rubber block. Two circular annular metal fittings are arranged opposite each other, and their flange parts are butt-joined to form a circular housing having a U-shaped cross section and housed under strong pressure. Anti-vibration rubber for strut-type suspension systems featuring: