JPH08128452A - Assembly of cylindrical roller bearing - Google Patents

Abstract

PURPOSE: To carry out the assembly of the inner and outer races in a simple manner, without requiring a jig for guide, even in the case where a retainer having a large roller drop quantity is used. CONSTITUTION: An assembly body 10A which is formed by incorporating a retainer 4 and a roller 3 onto an outer race 2 having a collar is installed on a housing 5. The inner and outer races 1 and 2 are assembled by pressing in an inner race 1 which is installed on a shaft 6 through press fitting, etc., into the assembly body 10A together with the shaft 6. In this case, before the assembly of the inner race 1, the place forming the bearing inside space of the assembly body 10A is coated with grease G. The coating quantity of the grease G is 5-20% of the bearing space capacity between the inner and outer races 1 and 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a cylindrical roller bearing suitable for assembling a cylindrical roller bearing using a cage having a large roller drop.

[0002]

2. Description of the Related Art In the process of assembling a cylindrical roller bearing having both flanges, the other bearing ring is incorporated in an assembly in which a cage and rollers are incorporated in the bearing ring having both flanges. Then, the grease is filled in the inner space of the bearing. FIG. 3 shows an assembly method in the case where the outer ring 52 is provided with a collar. An assembly in which a retainer 54 and rollers 53 are incorporated in the outer ring 52 is attached to the housing 55, and the inner ring 51 is attached to the shaft 56 by press fitting or the like. Is pressed into the outer ring 52 to assemble the bearing. At this time, if the cage 54 is of a type with a large amount of roller drop,
That is, in the case where the roller 53 is in a state in which the bearing ring is not assembled yet due to the pocket gap of the cage 54, the inner ring 51 interferes with the end surface of the roller 53 and is assembled. Cannot be done. Therefore, the sleeve 57 having the tapered guide surface 57a as shown in the figure is attached to the shaft 56 and the inner ring 51 is assembled.

[0003]

However, when the sleeve 57 is used in this way, the sleeve 57 becomes an obstacle after the assembly is completed, so that the sleeve 57 needs to be removed, and the removing work is troublesome. The sleeve 57 may not be removable depending on the configuration of the bearing-using device.

An object of the present invention is to provide a method for assembling a cylindrical roller bearing which allows easy assembly of the inner and outer rings without using a jig for guiding or the like even when a cage having a large amount of roller drop is used. It is to be.

[0005]

According to the method of assembling a cylindrical roller bearing of the present invention, one of the inner and outer races is provided with both flanges, and the cylindrical roller has a roller and a cage between the inner and outer races. Applied to bearings. In this bearing, when assembling the other bearing ring into the assembly in which the cage and the rollers are incorporated in the bearing rings with both flanges, the bearing ring with both the collars and rollers are installed before the other bearing ring is assembled. , Apply grease to the bearing inner space of the cage assembly. The amount of grease applied is 5 of the bearing space volume.
% To 20%. The "bearing space volume" is the volume of the bearing inner space generated between the inner and outer rings of the bearing, and is the volume between the inner ring and the outer ring minus the volume of the rollers and the cage.

[0006]

As described above, by pre-applying the grease, the adhesiveness of the grease prevents the rollers from falling when the bearing ring is assembled. Therefore, the problem of interference between the raceway ring and the end surface due to the roller drop is unlikely to occur, the raceway ring is easily assembled, and the assembly can be performed without using a guide component such as a sleeve. The grease used to prevent the rollers from falling is used as is for lubrication after assembly. Therefore, it is not necessary to fill grease after assembly. In this case, if the amount of grease applied is less than 5%, the prevention of roller drop due to the adhesiveness of grease becomes insufficient,
It has been confirmed by experiments that when the coating amount exceeds 20%, the amount of grease becomes too large and it is rather difficult to apply the grease to the rollers.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIG.
This embodiment is an example applied to a cylindrical roller bearing having an outer ring with a collar. The bearing 10 includes rollers 3 and a cage 4 provided between an inner ring 1 and an outer ring 2, which are races.
The inner ring 1 is one without a collar, and the outer ring 2 has a collar 2a on both sides. Although the cage 4 is a machined cage, it may be a steel plate punched cage.

Assembling the bearing 10 is as shown in FIG.
An assembly 10A in which a cage 4 and rollers 3 are incorporated in an outer ring 2 which is a ring with a collar is attached to a housing 5, and a shaft 6
The inner ring 1 attached by press fitting or the like is pushed into the assembly 10A together with the shaft 6 as shown in FIG.
In this case, before the assembling of the inner ring 1 by the above-mentioned pushing, the grease G is applied to the portion of the assembly 10A which will be the bearing internal space. This application may be performed before or after attaching the assembly 10A to the housing 5. The amount of grease G applied is 5% or more and 20% or less of the bearing space volume between the inner and outer rings 1, 2.

According to this assembling method, the grease G is applied in advance, so that the falling of the rollers when the inner ring 1 is assembled is prevented by the adhesiveness of the grease G. Therefore, even if the cage 4 is of a type with a large amount of roller drop, the problem of interference with the end faces of the inner rings 1 and 3 due to the roller drop is unlikely to occur, and the inner ring 1 can be easily assembled. Therefore, the assembly can be performed without using a guide component such as a sleeve. The grease G used to prevent the rollers from falling is used as it is for lubrication after assembly. In the above assembling method, the assembly 10A is attached to the housing 5 and the inner ring 1
Although 10A and 1 are assembled with the shaft 6 attached to the shaft 6, both or both of the assembly 10A and the inner ring 1 may be assembled separately without being attached to the housing 5 or the like.

Next, an experimental example of the above assembling method will be described.
As the bearing, a cylindrical roller bearing with both outer ring flanges of our bearing name "NU212GC4P5" was used. The bearing space volume of this bearing is 52 cm ³ . Albania E for grease
P3 (trade name) was used. The experimental number of assembled bearings for each grease application amount is three. Table 1 shows the experimental results.

[0011]

[Table 1]

As a result of this experiment, when the amount of grease applied was 4%, many rollers fell off, which hindered the assembly of the inner ring 1. It was confirmed that the rollers could fall off even when the grease application amount was 5%, but there was no problem when the inner ring 1 was assembled. When the coating amount was 10% or more, the rollers did not fall off. However, when the coating amount exceeds 22%, the grease amount becomes too large, and it is difficult to apply the grease G so as to adhere to the rollers 3. That is, the grease G does not adhere to the roller 3 in the normal grease application work, and the roller falls. From this experimental result, it is appropriate that the amount of grease G applied is 5% or more and 20% or less,
Within this range, it was confirmed that the rollers could be prevented from falling off and that the grease application work could be performed easily.

FIG. 2 shows another embodiment of the present invention. This embodiment is an example applied to a cylindrical roller bearing of a type in which the outer ring 2 has no collar and the inner ring 1 has a collar 1a on both sides.
In this case, the rollers 3 and the cage 4 are assembled in the inner ring 1 as shown in FIG. 1A, and the outer ring 2 is incorporated in the assembly 10B as shown in FIG. Also in this case, the outer ring 2
Grease G is applied to a portion of the assembly 10B, which is to be the bearing internal space, before the assembly. The amount of grease G applied is 2% if the bearing space volume between the inner and outer rings 1 and 2 is 5% or more.
It is 0% or less. Although the shaft and the housing are not shown in this embodiment, the work of incorporating the assembly 10B into the outer ring 2 may be performed with the assembly 10B and the outer ring 2 attached to the shaft, the housing, and the like. It may be assembled in a single state without being attached to these housings or the like. Even in the case of such a bearing with an outer ring collar, by applying the grease G in advance in the above-mentioned amount, the rollers can be prevented from falling and the assembly can be performed easily.

In each of the above-mentioned embodiments, one race was provided with both flanges and the other race was not provided with a collar, but the other race was provided with one flange. The present invention can also be applied to bearings.

[0015]

The method of assembling the cylindrical roller bearing according to the present invention is
When assembling the cage and rollers in the bearing ring with both collars, when assembling the other bearing ring, grease is previously applied to the bearing inner space of the assembly, and the amount of grease applied is the bearing space. Since the volume is 5% or more and 20% or less, even in the case of a cage with a large amount of roller drop, the roller prevents the roller from falling, and it is easy to assemble the inner and outer rings without the need for a guide jig. It can be carried out.
Moreover, the grease used to prevent the rollers from falling is used for lubrication as it is, and the grease filling work after assembly is unnecessary.

[Brief description of drawings]

FIG. 1 is an explanatory view of an assembling process showing an assembling method of a cylindrical roller bearing according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an assembling process showing an assembling method of the cylindrical roller bearing according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional assembling method.

[Explanation of symbols]

1 ... Inner ring (race ring), 2 ... Outer ring (race ring), 3 ... Roller,
4 ... Retainer, 5 ... Housing, 6 ... Shaft, 10A, 10B
… Assembly, G… Grease

Claims (1)

[Claims] 1. A method for assembling a cylindrical roller bearing, wherein one of the inner and outer races has both collars, and a roller and a cage are provided between the inner and outer races. When assembling the other bearing ring in the assembly incorporating the cage and the rollers, the bearing internal space of the assembly of the bearing ring, rollers, and cage with the two collars is installed before the assembly of the other bearing ring. The grease is applied to the area where is indicated by 5% of the bearing space volume between the inner and outer bearing rings.
The method for assembling the cylindrical roller bearing is 20% or less.