JP2578943Y2 - Combination of bearing and housing - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention comprises an outer bush made of a rubber elastic body or an elastic synthetic resin, and an inner bush inserted into the outer bush and having a self-lubricating sliding surface at least on its inner peripheral surface. ,
The present invention relates to a combination of a bearing and a housing for supporting the axial movement or rotation of a mating shaft.

[0002]

2. Description of the Related Art Conventionally, in a portion having a vibration input, such as a column bush for supporting a column shaft of an automobile.
As a bearing to be used , a bearing composed of an outer bush made of a rubber elastic body and an inner bush inserted into the outer bush is used in terms of vibration absorption and the like. However, in the conventional bearing, the inner bush is fixed in the outer bush by a method such as bonding with an adhesive or press fitting. In the fixing method by the above-described bonding, not only there are complicated steps such as an adhesive application step and a drying step, but also the adhesive adheres to the inner surface of the inner bush, that is, the sliding surface, and the winding bush is particularly used as the inner bush. When used, there is a problem that the adhesive penetrates into the sliding surface from the joint and significantly impairs the performance as a bearing.
On the other hand, even in fixing by press-fitting, there is a problem that the inner bush comes off due to stress relaxation of the outer bush, vibration, axial movement of the mating shaft, and the like.

In view of the above problems, the present inventor has previously proposed a combination of a bearing and a housing in Japanese Utility Model Application No. 61-174184 (Japanese Utility Model Application Publication No. 3-42256) to solve the above problems. This will be described with reference to FIGS. 5 to 7. The outer bush 2 made of a rubber elastic body has a locking portion 2 a having a diameter larger than the inner diameter of the inner bush 3 and smaller than the outer diameter at a part of the inner peripheral surface at one end. An outer lip 2b projecting in the radial direction is formed on a part of the outer peripheral surface of the end opposite to the end of the outer bush 2.
And the inner bush 3 and the housing 1
When the inner bush 3 is press-fitted, the outer lip 2b of the outer bush 2 is pressed against the inner surface of the housing 4, elastically deforms to the inner peripheral side and swells to the end of the inner bush 3, and the inner bush 3 is inserted into the outer bush 2. This is a combination of a bearing and a housing that are held in the housing. The combination of the bearing and the housing does not require a complicated process such as fixing by bonding in the above-described conventional technology, and the problem that the bearing performance is significantly impaired due to the adhesion and penetration of the adhesive to the bearing sliding surface, and Inner bush from outer bush
It was intended to solve problems such as slipping out and occurrence of a tapping sound due to vibration input.

[0004]

However, in the above-described combination of the bearing and the housing, the outer bush 2 and the housing 4 constituting the bearing are simply fixed by press-fitting. Due to the creep or the like, the fixing force between the outer bush 2 and the housing 4 changes, and the outer bush 2, in other words, the bearing 1 rotates relative to the housing 4 in the circumferential direction or slips out in the axial direction. A new problem has been found, such as the following problem. The present invention utilizes a combination of a bearing and a housing having means for preventing the bearing from rotating in the circumferential direction and preventing the bearing from slipping in the axial direction while effectively utilizing the advantages of the above-mentioned Japanese Patent Application No. 61-174184. The purpose is to obtain.

[0005]

To achieve the above object, the present invention employs the following technical means (configuration). That is, in a combination of a bearing and a housing constituted by an outer bush made of a rubber elastic body or a synthetic resin having elasticity, and an inner bush inserted into the outer bush and having a self-lubricating sliding surface on at least an inner peripheral surface thereof. The outer bush has a locking portion having a diameter larger than the inner diameter of the inner bush and smaller than the outer diameter on a part or the entire circumference of the inner circumferential surface at one end, and the entire outer circumferential surface at the end opposite to the locking portion. The circumference is provided with an annular ridge projecting radially outward, the housing is formed of a metal pipe and has a plurality of through holes in the circumferential direction thereof, and the outer bush and When a bearing consisting of an inner bush inserted into the inner peripheral surface of the outer bush is pressed into the housing, an annular ridge of the outer bush is formed. It is pressed against the inner surface of the inner peripheral surface side the housing, the outer peripheral surface thereof with a part thereof to hold the inner bush bulged end portion of the inner bush is elastically deformed in the outer bushing
The portion facing the through hole of the housing on the side is the housing
Between the housing and outer bush
The bearing is a combination of a bearing and a housing , wherein the bearing is formed with a circumferential stop and an axial stop against the housing.

In the above construction, the inner bush is made of a back metal made of a thin steel plate, a sintered alloy layer integrally joined to the surface of the back metal, and a plate-shaped bearing material made of a synthetic resin layer filled and coated with the alloy layer. A so-called wound bush that is formed by winding into a cylindrical shape is used.

[0007]

The inner bush is inserted into the outer bush by inserting one end of the outer bush into the engaging portion formed on the inner peripheral surface of the outer bush, thereby forming a bearing. Press fit into the housing. When this bearing is press-fitted into the housing, the annular ridge of the outer bush is pressed against the inner surface of the housing, and its inner peripheral side is elastically deformed radially inward and one end is inserted into contact with the locking portion. At the same time, the inner bush swells at the end of the inner bush and one end of the inner bush is firmly held in the outer bush in contact with the locking portion. The outer bushing swells into the through hole to form a mechanical connection between the two.
In other words, the bearing has a circumferential detent and an axial detent formed on the housing and is firmly combined with the housing.

[0008]

EXAMPLES Hereinafter, referring to FIG. 1 through FIG. 4 of the present invention accompanying drawings showing its embodiments will be described in detail. In the figure, a bearing 10 is provided with an outer bush 11 made of a rubber elastic body or a synthetic resin having elasticity, for example, a polyester elastomer, a polyurethane elastomer, etc., and a self-lubricating sliding surface inserted into the outer bush 11 at least on its inner peripheral surface. And an inner bush 12. As the inner bush 12, a back metal made of a thin steel plate, a sintered alloy layer integrally joined to the surface of the back metal, and a synthetic resin layer filled and coated with the alloy layer, for example, polytetrafluoroethylene resin, polyacetal resin, etc. , Formed by winding a plate-shaped bearing material of a cylindrical shape,
A so-called wound bush is used.

The outer bush 11 has a plurality of engaging portions 11a having a diameter larger than the inner diameter of the inner bush 12 and smaller than the outer diameter on an inner peripheral surface at one end thereof in a circumferential direction. The locking portion 11 of the outer bush 11
On the outer peripheral surface of the end opposite to the end where a is formed, an annular ridge 11b is formed to protrude radially outward over the entire circumference.

The inner bush 12 has one end formed on an inner peripheral surface of an end portion of the outer bush 11.
a, and inserted into the outer bush 11
The bearing 10 is configured. In FIG. 1, reference numeral 12 a denotes a butt portion of a winding bush constituting the inner bush 12.

The housing 20 is formed of a metal pipe, and the housing 20 has a plurality of through holes 20a formed in a circumferential direction thereof.

When the bearing 10 composed of the outer bush 11 and the inner bush 12 inserted into the outer bush 11 is pressed into the housing 20, the annular ridge 11b of the outer bush 11 The inner bush is pressed against the inner surface, and the inner peripheral side is elastically deformed radially inward, and one end swells to the other end of the inner bush 12 inserted in contact with the locking portion 11a of the outer bush 11, and the inner bush 12 It is firmly held in the outer bush 11. On the other hand, the outer peripheral side of the annular ridge portion 11b of the outer bush 11 swells into the through hole 20a formed in the housing 20, and a mechanical connection is formed between the two, thereby forming the outer bush 11, in other words, In this case, the bearing 10 is provided with a circumferential stop and an axial stop against the housing 20 with respect to the housing 20.

In the above embodiment, an example was shown in which a plurality of locking portions 11a were formed on the inner peripheral surface of one end of the outer bush 11, but this locking portion 11a
1 may be formed over the entire circumference of the inner peripheral surface at one end.

[0014]

According to the present invention, the following effects can be obtained by the above-described configuration. In a combination of a housing and a bearing consisting of an outer bush and an inner bush inserted into the outer bush, when the bearing is pressed into the housing, the annular ridge of the outer bush is pressed against the inner surface of the housing, The inner peripheral side is elastically deformed radially inward, and one end bulges into the other end of the inner bush inserted in contact with the locking portion of the outer bush, and the inner bush having one end in contact with the locking portion is connected to the outer bush. It can be firmly held in the bush. Further, the outer peripheral side of the annular ridge portion of the outer bush swells into a through hole formed in the housing to form a mechanical connection between the outer bush and the outer bush, in other words, the bearing is connected to the housing. On the other hand, since the circumferential stopper and the stopper in the axial direction are formed, troubles such as the bearing coming out of the housing or rotating in the circumferential direction of the housing due to the stress relaxation of the outer bushing are prevented. Is prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a bearing according to the present invention.

FIG. 2 is a view as viewed in the direction of the arrow II in FIG.

FIG. 3 is a longitudinal sectional view showing the housing according to the present invention.

FIG. 4 is a longitudinal sectional view showing a combination of the bearing and the housing according to the present invention.

FIG. 5 is a longitudinal sectional view showing a bearing according to the related art.

FIG. 6 is a view as seen from the direction of the arrows in FIG. 5;

FIG. 7 is a longitudinal sectional view showing a combination of a conventional bearing and a housing.

[Explanation of symbols]

10 ... bearing 11 ... outer bush 1
1a: locking portion 11b: annular ridge portion 12 ...
・ Inner bush 20 ・ ・ ・ Housing 20a
... Through holes

Claims (1)

(57) [Scope of request for utility model registration] 1. A bearing and housing comprising: an outer bush made of a rubber elastic body or an elastic synthetic resin; and an inner bush inserted into the outer bush and having a self-lubricating sliding surface on at least an inner peripheral surface thereof. The outer bush has a locking portion having a diameter larger than the inner diameter of the inner bush and smaller than the outer diameter on a part or the entire circumference of the inner circumferential surface at one end thereof, and the outer periphery of the end opposite to the locking portion. An annular ridge protruding radially outward on the entire circumference of the surface, the housing is formed of a metal pipe, and has a plurality of through holes in a circumferential direction thereof; When a bearing composed of an outer bush and an inner bush inserted into the inner peripheral surface of the outer bush is press-fitted into the housing, the outer bush has a ring shape. The inner peripheral surface of the ridge is pressed against the inner surface of the housing, and a part of the ridge is elastically deformed and swells to the end of the inner bush to hold the inner bush in the outer bush and at the same time as the outer peripheral surface thereof. Facing the through hole of the housing
The part swells into the through hole of the housing and
A combination of a bearing and a housing , wherein a mechanical connection is formed between the outer bushes, and the bearing has a circumferential stop and an axial stop against the housing.