JP2000081033A - Spherical bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spherical bearing to eliminate a caulking process and improve the tensile strength of an outer ring. SOLUTION: A spherical bearing comprises an inner ring provided on an outer surface with a spherical trajectory surface, an outer ring provided on an inner surface with a spherical trajectory surface rotatably fitted in corresponding to the spherical trajectory surface of the inner ring; and a bolt radially extending such that an axis situated in one spot on the outer peripheral surface of the outer ring passes through a position above the outer ring axis. In this spherical bearing, an inner ring-contained groove 4 positioned on the axis of a bolt and in the opposite load direction of the inner ring is formed in the inner peripheral part on one side of the outer ring 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spherical bearing, for example, a spherical bearing used for an automobile suspension or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 3 and 4, an inner race 30 having a spherical raceway surface 30a on its outer surface,
An outer ring 31 having an inner surface with a spherical raceway surface 31a rotatably fitted to the spherical raceway surface 30a of the outer race 3;
A bolt 32 provided at one location on one outer peripheral surface 31b and extending in the radial direction so that the axis X2-X2 passes on the axis X1-X1 of the outer ring 31;
There is known a spherical bearing in which an inner ring 30 and an outer ring 31 are integrally connected by caulking the outer ring 4 over the entire circumference. Normally, the inner ring 30 and the outer ring 31 are separately subjected to a surface treatment such as galvanization to prevent rust before assembling.

[0003]

In the above-mentioned conventional spherical bearing, caulking 33, 3 of the outer peripheral surface of both ends of the outer ring 31 is performed.
4, the inner ring 30 is held inside the outer ring 31. Therefore, the cross-sectional area of the inner ring 30 holding portion of the outer ring 31 is small, and the outer ring when the inner ring 30 is subjected to a tensile load (F is the load direction of the inner ring 30). 31 Low tensile strength. Further, since the outer ring 31 needs to be caulked, the hardness of the outer ring 31 cannot be so hardened, which may cause a problem in strength. Further, there is a problem that the rust-preventive zinc plating or the like may be peeled off when the outer ring 31 is swaged.

Therefore, the present invention eliminates caulking,
It is an object of the present invention to provide a spherical bearing capable of improving the tensile strength of an outer ring.

[0005]

As means for solving the above-mentioned problems, an inner ring having a spherical raceway surface on an outer surface and a spherical raceway surface rotatably fitted corresponding to the spherical raceway surface of the inner race are provided. In a spherical bearing having an outer ring provided on an inner surface and a bolt provided at one place on an outer peripheral surface of the outer ring and extending in a radial direction so that an axis passes on an axis of the outer ring, a shaft of the bolt is provided on an inner peripheral portion on one side of the outer ring. An inner race groove is formed on the line and in a direction opposite to the load of the inner race.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 and 2
Is a spherical bearing according to an embodiment of the present invention, wherein an inner race 1 has a spherical raceway surface 1a on an outer surface, and a spherical raceway surface 2a rotatably fitted in correspondence with the spherical raceway surface 1a of the inner race 1. Outer ring 2 having on its inner surface an outer peripheral surface 2 of this outer ring 2
b, the axis X2-X2 is provided at one position of the outer ring 2 axis X1.
And a bolt 3 extending in the radial direction so as to pass on the X1.
An inner ring groove 4 is formed on the inner ring 2 and in a direction opposite to the load of the inner ring 1 (a direction opposite to the load direction F by 180 °). The inner and outer rings 1 and 2 are subjected to a surface treatment such as zinc plating for rust prevention.

That is, the groove 4 is formed in an arc shape, and the length a of the arc is symmetrical with respect to the axis X2-X2 of the bolt 3 and the length a of the arc is larger than the width b of the inner ring 1. Also,
The distance D2 from the bottom of the groove 4 to the inner periphery of the side surface of the outer race 2 on the bolt 3 axis X2-X2 is larger than the maximum outer diameter D1 of the inner race 1. Further, the groove 4 is formed at the same depth over the entire width of the outer ring 2. Therefore, inner ring 1
When the inner ring 1 is assembled into the outer ring 2, the inner ring 1 is inserted so that the inner ring 1 peripheral surface 1b is orthogonal to the outer ring 2 side surface 2c, and the inner ring 1 is aligned with the groove 4 and inserted in the direction of the axis X1-X1 of the outer ring 2. Thereafter, the inner race 1 can be assembled by rotating it by 90 ° so that the inner raceway surface 1a and the outer raceway surface 2a correspond to each other. In this way, the inner race 1 is held within the outer race 2 without caulking the outer peripheral surface of the end of the outer race 2.

As described above, the caulking of the outer ring 2 is unnecessary, so that the hardness of the outer ring 2 can be improved by heat treatment, and the cross-sectional area of the inner ring 1 holding portion of the outer ring 2 increases, so that the inner ring 1 in the load direction F is increased. The tensile strength of the outer ring 2 when a tensile load is applied increases. Furthermore, since the outer ring 2 is not required to be caulked, the surface treatment for rust prevention of the outer ring 2 does not come off, so that the generation of rust is prevented.

[0009] Further, the insertion groove 4 is formed so that the axis X2-
Since the inner ring 1 and the outer ring 2 are located on the inner ring 1 and in the direction opposite to the load of the inner ring 1, when the inner ring 1 is loaded with a tensile load, the inner ring 1 and the outer ring 2 come into contact with the entire surface in the load direction F, and the surface pressure is reduced. 1 can be avoided as much as possible, and the movement of the inner ring 2 is not hindered.

In the course of development of the present invention, the applicant tested a case in which the groove 4 was positioned in the load direction F of the inner ring 1, but in the load direction F, the spherical contact portion between the inner ring 1 and the outer ring 2 was small. Therefore, there is a problem that the surface pressure is large, the outer ring 2 is easily deformed, and the movement of the inner ring 1 is easily hindered. Further, in this case, since the groove 4 is provided in the load direction F, the load resistance is poor.

Further, the applicant has proposed that the groove 4 be positioned at a position 180 ° opposite to the load direction F and the counter load direction of the inner race 1.
We also tested the one formed in the place, in this case, the inner ring 1
When the tensile load is applied, the inner ring 1
It was also confirmed that the inner ring 1 was deformed to the side and the movement of the inner ring 1 was hindered.

[0012]

As described above, according to the present invention, an inner race groove is formed on the inner periphery of one side surface of the outer race on the axis of the bolt and in the direction opposite to the load of the inner race. Since the inner ring is fitted into the outer ring, caulking of the outer ring is not required, and the tensile strength of the outer ring is further improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a spherical bearing according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a plan view of a conventional spherical bearing.

FIG. 4 is a longitudinal sectional view of FIG.

[Explanation of symbols]

 1 inner ring 2 outer ring 3 bolt 4 inner ring groove

Claims (1)

[Claims] 1. An inner race having a spherical raceway surface on the outer surface, an outer race having a spherical raceway surface rotatably fitted in correspondence with the spherical raceway surface of the inner race, and one portion of an outer peripheral surface of the outer race And a bolt extending in the radial direction so that the axis passes on the axis of the outer ring, the inner ring being located on the inner periphery of one side of the outer ring on the axis of the bolt and in the anti-load direction of the inner ring. A spherical bearing having a groove formed therein.