JPH0342256Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention consists of an outer bushing made of a rubber elastic body or an elastic synthetic resin, and a self-lubricating slide inserted into the outer bushing at least on its inner periphery. This relates to a combination of a bearing and a housing, which are configured with an inner bush having a surface and which accept the axial movement or rotation of a mating shaft.

<Prior Art> Conventionally, bearings used in parts that receive vibration input, such as column bushings that support the column shaft of automobiles, have an outer bushing made of a rubber elastic body as described above, and an outer bushing made of a rubber elastic body as described above. Bearings are used because of their vibration absorbing properties, which are comprised of an inner bush that is inserted into an outer bush and has a self-lubricating sliding surface on at least its inner peripheral surface.

<Problems to be Solved by the Invention> However, in conventional bearings, the inner bushing is fixed within the outer bushing by adhesive bonding or press fitting.

In the above-mentioned fixing by adhesive, not only is there a complicated process such as an adhesive application process and a drying process, but also the adhesive adheres to the inner diameter surface of the inner bushing. In some cases, there is a problem in that the adhesive enters the inner diameter surface through the seam, significantly impairing the performance of the bearing. Furthermore, when an oil-impregnated bearing is used as the inner bushing, there is a problem in that the adhesive strength is weak and the inner bushing may slip out.

On the other hand, even when fixing by press-fitting, there is a problem that the inner bushing may come off due to stress relaxation of the outer bushing, vibration, axial movement of the mating shaft, etc.

The purpose of the present invention is to solve the above-mentioned problems of the conventional technology and to provide a combination of a bearing and a housing that can securely hold the inner bushing within the outer bushing without requiring complicated processes. shall be.

<Means for solving the problems> In order to achieve the above-mentioned purpose, the present invention adopts the following configuration.

In other words, the bearing and housing are composed of an outer bushing made of a rubber elastic body or a synthetic resin having elasticity, and an inner bushing inserted into the outer bushing and having a self-lubricating sliding surface at least on its inner periphery. In the combination,
The outer bushing has a locking portion having a diameter larger than the inner diameter and smaller than the outer diameter of the inner bushing on a part or the entire circumference of the inner peripheral surface of the outer bushing, and an end opposite to the end where the locking portion is formed. An outer lip protruding in the radial direction is formed on a part or the entire circumference of the outer peripheral surface of the end portion. When the bearing is press-fitted into the housing, the outer lip is pressed against the inner surface of the housing, elastically deforms inward, bulges out at the end of the inner bushing, and moves the inner bushing into the outer bushing. This is a combination of a bearing and a housing that are held in place.

<Example> The present invention will be described in detail below based on the example shown in the drawings.

1 to 3 show an embodiment of the bearing of the present invention. The bearing 1 is composed of an outer bushing 2 made of a rubber elastic body or an elastic synthetic resin, and an inner bushing 3 inserted into the outer bushing 2 and having a self-lubricating surface on at least its inner peripheral surface 3a. Ru. Here, the inner bushing 3 is a cylindrical bushing molded from a synthetic resin having self-lubricating properties, a thin steel plate, a sintered alloy layer formed on the steel plate, and a synthetic resin coated on the alloy layer. A so-called rolled bush made of a resin layer and formed by winding the resin layer inside is used.

The outer bush 2 has a plurality of locking portions 2a formed in the inner peripheral surface of one end thereof in the circumferential direction, each having a diameter larger than the inner diameter and smaller than the outer diameter of the inner bush 3.

A plurality of outer lips 2b protruding in the radial direction are formed in the circumferential direction on the outer peripheral surface of the end of the outer bush 2 opposite to the end where the locking portion 2a is formed.

When the bearing 1, which is formed by inserting the inner bush 3 into the outer bush 2, is press-fitted into the housing 4, the outer lip 2b of the outer bush 2 is pressed against the inner surface of the housing 4, and an elastic layer is formed on the inner circumferential side. It deforms and bulges out at the end of the inner bushing 3, thereby firmly holding the inner bushing 3 within the outer bushing 2.

In the embodiment described above, a plurality of locking portions 2a are formed on the inner peripheral surface of one end of the outer bush 2, and a plurality of outer lips 2b are formed on the outer peripheral surface of the outer bush 2. The locking portion 2a and the outer lip 2b may be formed over the entire inner circumferential surface or outer circumferential surface of the outer bushing 2.

4 and 5 show other embodiments of the bearing unit of the present invention. In order to simplify the explanation, parts having the same functions as those in FIGS. 1 to 3 will be described using the same reference numerals.

In this embodiment, the locking portion 2 of the outer bush 2 is
Inner lip 2 protruding toward the inner diameter side on the a-forming side
c is formed. After inserting the mating shaft 5 into the inner bush 2, the inner lip 2c
Due to its elastic force, it comes into close contact with the outer peripheral surface of the mating shaft 5 and elastically supports the mating shaft 5, thereby preventing the shaft 5 from wobbling due to vibration input. The other configurations are exactly the same as the embodiments described above.

<Effects of the invention> By adopting the above-mentioned configuration, the bearing of the present invention has a very simple structure that reliably holds the inner bushing within the outer bushing, eliminating the need for complicated processes such as fixing with adhesive. There is no problem such as the adhesive adhering to or penetrating the bearing sliding surface and significantly impairing the bearing performance.

Furthermore, the inner bushing may come off due to stress relaxation of the outer bushing, vibration input, axial movement of the cylindrical shaft, etc., and hammering noise (rattling) due to vibration input.
Problems such as the occurrence of

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, and is a longitudinal sectional view showing the state before the bearing is press-fitted into the housing, Fig. 2 is a view taken along the - arrow in Fig. 1, and Fig. 3 shows the bearing. FIG. 4 is a vertical cross-sectional view showing another embodiment of the present invention, showing the state before the bearing is press-fitted into the housing, and FIG. FIG. 7 is a longitudinal cross-sectional view showing a bearing press-fitted into a housing according to another embodiment of the invention; 1...bearing, 2...outer bushing, 2a...
...locking part, 2b...outer lip, 2c...inner lip, 3...inner bush, 3a...
...Inner peripheral surface, 4...Housing.

Claims (1)

[Claims for Utility Model Registration] (1) An outer bushing made of a rubber elastic body or an elastic synthetic resin, and an inner bushing that is inserted into the outer bushing and has a self-lubricating sliding surface on at least its inner periphery. In the combination of a bearing and a housing made up of
The outer bushing has a locking portion having a diameter larger than the inner diameter and smaller than the outer diameter of the inner bushing on a part or the entire circumference of the inner peripheral surface of the outer bushing, and an end opposite to the end where the locking portion is formed. An outer lip that protrudes in the radial direction is formed on a part or the entire circumference of the outer peripheral surface of the end, and when the bearing is press-fitted into the housing, the outer lip is pressed against the inner surface of the housing and elastically deforms inward. A combination of a bearing and a housing, characterized in that the inner bushing bulges out at the end of the inner bushing and retains the inner bushing within the outer bushing. (2) An inner lip is formed on a part or the entire circumference of the inner diameter of the outer bushing on the side where the locking part is formed, which protrudes toward the inner diameter side and elastically supports the shaft inserted into the inner bushing. A combination of a bearing and a housing according to claim 1 of the utility model registration.