JPH018751Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a suspension bushing.

Prior Art This type of conventional suspension bushing generally has the structure shown in FIG. Metal inner cylinder 2
It had a structure in which the material and the resin sheet were slid together.

However, in this type of suspension bushing, muddy water enters between the metal inner cylinder 2 and the rubber member 1 and reaches the contact surface between the resin sheet and the metal inner cylinder 2, causing corrosion of the metal inner cylinder 2. There was a fear that this would accelerate the abrasion of the resin sheet.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a suspension bushing which eliminates the above-mentioned drawbacks of the conventional suspension bushings and has improved durability while reducing torsional rigidity compared to the conventional suspension bushings.

Structure of the invention That is, the structure of the invention includes an inner cylinder and an outer cylinder made of metal, an inner cylinder side rubber and an outer cylinder side rubber are provided between these cylinders, and a part of the contact area between these rubbers is made of resin. It is characterized in that the ring and the metal ring are brought into intervening contact.

Effects of the Invention Therefore, according to the configuration of the present invention, since the contact part is formed between the rubber members and the resin ring and the metal ring are in contact with a part of the contact part, the sealing performance is improved by the contact between the rubber members. At the same time, due to the contact between the resin ring and the metal ring, the frictional resistance can be reduced and the torsional rigidity can be reduced.Also, the sealing performance is good and the torsional rigidity is low, which increases the durability of the suspension bushing. can also be improved.

Embodiments The present invention will be described below with reference to embodiments shown in the drawings.

As shown in FIG. 2, an inner cylinder side rubber 5 is provided between a metal outer cylinder 3 having a flange portion and a metal inner cylinder 4.
and outer cylinder side rubber 6 are provided. The inner cylinder side rubber 5 is vulcanized and bonded to the inner cylinder 4, and the outer cylinder side rubber 6 is vulcanized and bonded to the outer cylinder 3.The outer cylinder side rubber 6 has the shape shown in FIG. The inner cylinder side rubber 5 is dimensioned to fit smoothly into the inner cylinder side. After inserting the inner cylinder side rubber 5 into the outer cylinder side rubber 6, a restriction is given to the metal outer cylinder 3, and when the product is completed, the outer cylinder side rubber 6 and the inner cylinder side rubber 5 are
Sufficient surface pressure is applied to the contact surface to form a seal.
In this case, if the outer cylinder 3 cannot be sufficiently drawn, a cut 7 is provided in the outer cylinder 3 as shown in FIG. 2 so that compression is applied to the rubber member when it is press-fitted into the suspension arm.

Further, as shown in FIGS. 2 and 3, the outer cylinder side rubber 6 has a metal ring 8 adhered to the center of the inner peripheral part, and the inner cylinder side rubber 5 has a resin ring 9 adhered to it. Unlike the contact between rubber members, the metal ring 8 and the resin ring 9 reduce their frictional resistance. Therefore, as can be seen from FIG. 2, a sufficient sealing effect is maintained at the contact portion between the inner cylinder side rubber 5 and the outer cylinder side rubber 6, and the torsional rigidity between the metal ring 8 and the resin ring 9 is reduced. In order to further reduce the torsional rigidity, grease or the like for lubrication is applied between the metal ring 8 and the resin ring 9.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part of a conventional suspension bushing, Figs. 2 and 3 show a suspension bushing according to the present invention, and Fig. 2 is a sectional view of the main part thereof. FIG. 3 is a cross-sectional view of the main part before vulcanization. 3...Metal outer cylinder, 4...Metal inner cylinder, 5...Inner cylinder side rubber, 6...Outer cylinder side rubber, 8...Metal ring, 9...Resin ring.

Claims (1)

[Scope of utility model registration request] A metal inner cylinder and an outer cylinder are provided, and an inner cylinder side rubber and an outer cylinder side rubber are provided between these cylinders, and a resin ring and a metal ring are interposed in contact with a part of the contact area between these rubbers. Suspension bushing featuring.