JPS60132121A - Bearing body arranged in o type - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In this invention, each inner raceway is provided on a common mechanical component, and the outer races N1 and N1 are loaded with each other in the radial and axial directions through the row of rolling elements 3, and are mutually supported through a spacer. This invention relates to a bearing body for an O-type device having two angular bearings, and a method for assembling the bearing body.

A single bearing body of this type is known from British Patent No. 542,669. In this roof tile, the inner raceways for the two balls are arranged on a single shaft.

In addition, the raceway of the inner ring and each outer ring forming the angular contact ball bearing with each raw material is made in a 0-type arrangement or a back-to-back combination.

This requires a special assembly, which involves (α) placing one rolling element row on one of the inner raceways, and (6) placing one of the outer rings on the other inner raceway, which does not yet have a rolling element row. (1) Fit another outer ring beyond the other inner raceway, which has no rolling element row, until it touches the already rolled outer ring, (d) Fit another outer ring onto the other inner race, which has no rolling element row yet. The outer ring placed on the inner raceway and (6) fitted later? Shift it back toward the row of rolling elements on the other inner raceway, and place it V) Spacer between both outer rings? (g) fixing the spacer in that state;

In that case, is it the spacer that is heavily loaded? Insert each outer ring between both outer rings? The idea is to move them toward their respective inner orbits. Known constructions use radially segmented elastic spacer pieces. The important drawback of this bearing body is that this spacer piece has to be made separately, and its manufacturing tolerances are added to those of both outer rings, so large tolerances for the whole can be expected.
Must be. This relates in particular to variations in the width of the outer ring and spacer pieces. Under normal manufacturing conditions, therefore, different adjustment values occur in the bearing body, which greatly affects the service life of the bearing body and causes premature failure. This disadvantage can be avoided in the known construction by very precise manufacturing, but this increases the cost of the bearing body.

An object of the present invention is to create a tile and a method for assembling the same to obtain a bearing body with little variation and uniform adjustment values under normal mass production conditions.

In the present invention, the spacer protrudes in the axial direction integrally with each outer ring (
The protrusions are shaped like combs, and when assembled, they are inserted alternately between the teeth of the comb, so that the end surfaces of the teeth of the comb are in contact with each other, and when assembled, as described above. The protruding part of one outer ring? Once the second outer ring is inserted into the space between the protrusions of the other outer ring and the second row of rolling elements is arranged, one of the outer rings is pulled back toward that row of rolling elements and then rotated.
The above-mentioned problem was solved by bringing the tip surfaces of the protrusions of both outer rings into contact with each other.

In other words, since the spacer is provided integrally with each outer ring, under normal conditions, it is only necessary to take into account the manufacturing tolerance of both outer rings, and manufacturing inaccuracies are not added any more. The end surface of the projection is a partial surface of the end surface of the outer ring and can therefore be turned and machined just as if the end surface were uninterrupted. The outer ring is simply made wider than normal, and a space is created in the middle depending on the number of protrusions.

There is no need to process the boundary surface of the gap more than that.

This is because they do not contribute to the function or accuracy of the bearing body. The spacing portion may be slightly wider than the length of the protruding portion in the circumferential direction in order to generate play in the circumferential direction in one combination. Machining tolerances and surface quality no longer play a role. Spacings can be produced, for example, by milling, punching or splitting. If the end faces of the protrusions are ground, they can be produced at the same high cost as for ordinary outer rings. It can be considered that the bearing body according to the present invention has high uniformity of adjustment in the circumferential direction, and is suitable for mass production. This ensures much tighter adjustment tolerances across the bearing body.In addition, it is easy to assemble and can be automated at little cost.

In this invention, each outer ring has a small number (both have two protrusions).

The two protrusions are preferably provided diametrically opposite each other. In other words, the protrusions and the spacing sections are arranged alternately at an angle of 0 (in this case, the spacing section is made slightly wider in the circumferential direction to allow the introduction of the protrusion section of the other outer ring. When the bearing body is assembled, the diameter Two protrusions facing each other in the direction touch each other with their end faces to form two spacers, and two spacers face each other in the circumferential direction. However, if there are three or more protrusions, There may be.

As an embodiment of the present invention, the end face of each protrusion may have a slope slightly inclined with respect to the circumferential direction at the corner. Is this the outer ring? It becomes very easy to turn, and even a previously stressed bearing body can be easily assembled.

Outer ring? When relatively twisted, the edge of the end surface of the protruding portion of one outer ring comes into contact with the slope of the other outer ring.

When twisted further, both outer rings are stretched in the axial direction and their end surfaces come into contact. In other words, the edges of both outer rings collide and do not interfere with twisting.

Further, in the present invention, the diameter of the outer circumference of the protrusion may be smaller than the diameter of the outer circumference of the outer ring, and the annular step formed on the outer circumference of the protrusion may be filled with a sleeve-like cover in the assembled state. The sleeve-like cover generally circumferentially closes the gap between the projections and seals the interior between the rolling bearings.

The annular step is necessary because the cover does not extend beyond the outer peripheral surface 2 of the outer ring in the radial direction. The cap (-) may be, for example, a plastic sleeve that can be expanded and contracted.

Furthermore, this sleeve-like cover has an axial slit,
That area may be provided with a snap element that cooperates with the projection.

This makes assembly easier. The cover is Surin)Y
This is because by expanding it, it is guided onto the bearing body and then contracting back into the sleeve. The snap element then grips the rear of the projections through the spacing between the projections and prevents the outer rings from twisting relative to each other.

The following is an example of this invention. This will be explained with reference to the drawings.

The bearing body shown in FIG. 1 includes an integral bearing sleeve J having two inner raceways /, /2, two upper rows 3, two outer rings, and a spacer arranged between the outer rings! and a sleeve-shaped cover 6.

Painter bearings are made as angular contact ball bearings3. .

It is assembled by a shape device or a back-to-back combination.

The spacer j pushes each of the two outer rings axially outward, toward each upper row 3 or inner raceway l. The spacer j is a protrusion that extends from each outer ring ψ in the axial direction to the four parts! In the assembled state of the bearing body, the sides formed by the bearing body are in contact with each other at the end face 7.

As you can clearly see in Figure 2, there are four protrusions! are uniformly distributed around the outer ring and have an arcuate length that is slightly smaller than the space between them in the circumferential direction. Therefore, are the two outer rings different from each other's protrusions? As shown in FIG. 3, they can be combined in an intricate manner, and in that case, the length in the axial direction is longer than that in the assembled state where the end surfaces 7bt of the protrusions j are in contact with each other as shown in FIG. Therefore, after arranging one of the rows of rolling elements around one inner race as described in British Patent No. 542,669, both outer races are Next, the remaining rolling elements are arranged around the inner raceway, and then one outer ring 'lf' and the other outer ring 'lf' are fitted in the right direction as shown in Fig. 6. Move it axially in the direction shown by the arrow, release it, and bring it into contact with the upper row 3 (see Figure 1).Next, twist the right outer ring 4t in the direction of the upper arrow with respect to the other outer ring.

This twisting can be easily performed because the inner and outer rings are coaxially supported on the balls 3. Furthermore, in order to reach the final position of the assembly, a bevel 2 is provided in the corner area of the end face 7 of the protrusion, which prevents the protrusion from colliding with each other when twisting.

In this way, the end surfaces of the protrusions of both outer rings are brought into contact with each other, resulting in an assembled state (FIG. 4). Furthermore, four spaces which are in contact with each other on the end faces 7 of the projections and which are distributed in the circumferential direction are created by the spacing g between the projections. These spaces are closed by a sleeve-shaped cover 6 that covers the outer periphery of the protrusion.

This is why the protrusion! The diameter of the outer circumference of the outer ring is smaller than the outer circumference of the outer ring, and it is placed in steps as shown in the figure.

If you look at the 2nd map of the prefecture (as you can see, there is a sleeve-shaped cover/<
-i has an axial slit lQ, and this slit 1
Expand it radially and guide it over the bearing body, and fit into the step on the outer periphery of the protrusion. A snap element (1) is provided over the entire axial length of the cover in the area of the opening (10), and this snap element (1) passes through the space and radially grips the axial edge of the outlet. This can prevent both outer rings from twisting against each other.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view in the axial direction, FIG. 2 is a sectional view taken along the line A--A in FIG.
The figure shows a plan view of the two outer rings with the protrusions inserted for assembly, and Figure #fJ4 shows a plan view 2 of the two outer rings in the assembled state. In the figure, / is the inner raceway, - is the bearing sleeve, 3
1 indicates a rolling element row, Hiroshi indicates an outer ring, and 5 indicates a protrusion (separator). Patent applicant Niskaev Kugellagelfabrikengesellschaft Mitsut Beschlenckdelha 7 Zung continued from page 1 0 Inventor Wolfgang Fri Federal Republic of Germany - Dritzchstrasse 26 @ Inventor Rudiger Hans Federal Republic of Germany Utratssee 8

Claims (5)

[Claims] (1) each inner raceway/is provided on a common mechanical part 2;
The outer ring consists of two angular bearings that are mutually loaded in the radial and axial directions through the rolling element row 3 and are mutually supported via a spacer. In the bearing body of the O-type device, the spacers are comb-shaped and can be intertwined and combined alternately during assembly, and in the assembled state, the outer rings touch each other at the end faces and are integral with the axially directed protrusion! What is it made as? Characteristic bearing body. (2) The bearing body according to claim (1), wherein each outer ring≠ has at least two protrusions j. (3) The bearing body according to claim (2), in which the protrusion j has a slope slightly inclined with respect to the circumferential direction at the corner of the end face 7 region. (4) Protrusion! The diameter of the outer circumference of the outer ring is smaller than the diameter of the outer circumference of the outer ring, so that the annular step thus formed is filled in the assembled state by a sleeve-like cover 6. Any one bearing body. (5) The sleeve-shaped cover 6 has an axial slit 10
and a snap element that cooperates with the protrusion in that area //f
f: Claims (1) to (4)
or one bearing body.