JPH09177773A - Full roller-type cylindrical roller bearing and filling method for solid lubricant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the number of days for manufacture from being increased by arranging cylindrical rollers at least one fewer than the regular number of them on a jig in which a U-shaped housing part corresponding to the raceway diameter sizes of inner and outer races, and filling and solidifying solid lubricant in the housing part. SOLUTION: When cylindrical rollers 3 are inserted into a housing part 11 formed by assembling an intermediate jig 14 to a lower jig 13 of a jig 12, the rollers 3 are arranged along a projecting part 17 of the lower jig 13 and the intermediate jig 14, and the rollers 3 one fewer than the irregular number of them are housed by a projecting piece 18 of the intermediate jig 14 The housing part 11 is blocked by bonding and fixing an upper jig 15 to the lower jig 13, and solid lubricant 5 is filled into the housing part 11 from a solid lubricant filling hole 20 of the lower jig 13 and solidified. A U-shaped solid body 21 taken from the jig 12 is extended by elastic deformation of the solid lubricant itself and assembled to the inner race 1, one roller 3 is inserted between both end 22, and the inner race l is inserted into the outer race 2. Accordingly, the same manufacturing process for the bearing as that in which no solid lubricant is filled can be made without increasing the number of days for manufacturing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full complement cylindrical roller bearing and a solid lubricant filling method therefor, and more specifically, it is used as a bearing for super-heavy loads and has a cylindrical roller filled with a solid lubricant between inner and outer rings. The present invention relates to a double-row full-roller type (for example, SL type) cylindrical roller bearing which is inserted by the method described above, and a method for manufacturing the same, in which a solid lubricant is filled in the space between the inner and outer rings in which the cylindrical roller is inserted.

[0002]

2. Description of the Related Art For example, double-row full-roller type (for example, SL type) cylindrical rollers are used as super-heavy load bearings used in construction machinery, vehicles, steel, hoisting machinery, etc., at locations where large bearing loads act at low speeds. There is a bearing.

This double-row full complement cylindrical roller bearing has an inner ring 1 fixed to a rotating shaft (not shown) as shown in FIG.
The outer ring 2 fixed to a housing (not shown) and the cylindrical rollers 3 arranged in double rows between the inner and outer rings 1 and 2 constitute the main part. The inner ring 1 has a structure in which the inner ring 1 is axially divided into two in order to be assembled in the outer ring 2 in a state where the cylindrical roller 3 is mounted on the raceway surface. In addition, the central portion in the axial direction of the inner ring 1, that is,
An oil supply hole 4 is formed at a portion corresponding to the row gap of the cylindrical rollers 3 arranged in a plurality of rows. The oil supply holes 4 are provided at a plurality of locations along the circumferential direction of the inner ring 1.

Since this type of cylindrical roller bearing is used under a heavy load and in a bad environment (seawater, muddy water, etc.), the inner ring 1 described above is used.
Maintenance such as replenishment of grease from the oil supply hole 4 is required, but due to the nature of the machine, frequent maintenance work is difficult. Therefore, in order to extend the maintenance work interval, the space between the inner and outer races 1 and 2 in which the cylindrical roller 3 is inserted is filled with the solid lubricant 5 in advance.

Here, in the manufacture of the cylindrical roller bearing, the following two methods are adopted in order to separate the double rows of the cylindrical rollers 3 into each row when the solid lubricant 5 is filled. .

The first method is to grind the raceways of the inner and outer rings 1, 2 and then assemble the inner ring 1, the outer ring 2 and the cylindrical roller 3 as shown in FIG. A T-shaped spacer 6 is inserted and arranged in the row gap of the cylindrical rollers 3. The spacers 6 are required to separate the double row cylindrical rollers 3 from each other because the roller rows are advanced or delayed due to an unbalanced load. Further, the jig 8 having the solid lubricant filling hole 7 which is also an air vent hole is assembled from the outer side in the axial direction of the inner and outer races 1, 2.

After this assembly, the solid lubricant 5 is filled through the solid lubricant filling hole 7 of the jig 8 and heated at a predetermined temperature and for a time to solidify. The solidified solid lubricant 5 is separated by the spacer 6 inserted into the row gap of the cylindrical rollers 3. Then, after natural cooling, the jig 8 is removed, and the two inner rings 1 are pulled out axially outwardly to remove the spacer 6, and the inner ring 1 is incorporated into the outer ring 2 again. afterwards,
The work is completed by inserting the inner ring retaining ring, press-fitting the seal, and filling grease.

As a second method, the inner and outer rings 1 and 2 are
After grinding the raceway surface of the inner ring 1 and the cylindrical roller 3 as shown in FIG. 8, the outer ring 2 described in the first method is used.
It is attached to the cylindrical jig 9 instead of the. The cylindrical jig 9 is provided with a solid lubricant filling hole 10 at one place, and the portion where the solid lubricant filling hole 10 extends is projected into the row gap of the cylindrical rollers 3. Further, as in the first method, the jig 8 having the air vent hole 7 is assembled from the axially outer side of the inner ring 1.

After the assembling, the solid lubricant 5 is filled from the solid lubricant filling hole 10 of the cylindrical jig 9 and heated at a predetermined temperature and time to be solidified. The solid lubricant 5 solidified is only connected at one location corresponding to the solid lubricant filling hole 10 in the row gap of the cylindrical rollers 3, so that the solid lubricant 5 can be divided easily. Then, after natural cooling, the jig 8 is removed, and then the two inner races 1 are pulled out to the outside in the axial direction and incorporated into the outer race 2. After that, the work is completed by performing the inner ring retaining ring, press-fitting the seal, and filling the grease.

[0010]

In the conventional case, there were the following problems in filling the solid lubricant.

In the first method described above, since it is necessary to separate the double-row cylindrical rollers 3 for each row, the T-shaped spacer 6 is inserted in the row gap of the cylindrical rollers 3, and the solid lubricant 5 is added. It takes time and effort to remove it after solidification. Therefore, if the spacer 6 is made of a cage material such as copper alloy,
Although the removal work after the solid lubricant 5 is solidified is unnecessary, the number of parts is increased and the cost of the product is increased.

On the other hand, the second method is preferable in that the T-shaped spacer 6 is not used unlike the above-mentioned first method, but a dedicated cylindrical jig 9 is used instead of the outer ring 2 in the first method. In addition, since the inner ring 1 and the cylindrical roller 3 must be assembled to the cylindrical jig 9, it is difficult to improve the production efficiency.

Further, as a problem common to the above-mentioned first and second methods, the work of filling the solid lubricant 5 is carried out after the raceway surfaces of the inner and outer races 1 and 2 are ground, and the solid lubrication amount is increased accordingly. Compared with other bearings of the type not filled with agent 5,
There was a problem that the number of days required for production increased.

Therefore, the present invention has been proposed in view of the above problems, and an object thereof is to manufacture a standard bearing without filling solid lubricant without increasing the number of days required for manufacturing. It can be the same as the process.

[0015]

As a technical means for achieving the above object, the solid lubricant filling method of the present invention comprises:
In manufacturing a full-roller type cylindrical roller bearing in which a plurality of cylindrical rollers are interposed between the inner and outer rings, a regular number of rollers is formed by a jig having a C-shaped accommodating portion corresponding to the raceway diameter dimension of the inner and outer rings. C-shaped solidification in which the cylindrical rollers are connected and integrated with a solid lubricant by arranging one or more smaller number of cylindrical rollers in the accommodating part and filling the accommodating part with a solid lubricant to solidify. It is characterized by making a body.

Further, the solid lubricant filling method of the present invention corresponds to the raceway diameter dimension of the inner and outer rings in the manufacture of a full complement cylindrical roller bearing in which a plurality of cylindrical rollers are interposed between the inner and outer rings, A jig having a plurality of divided arc-shaped housings is used to divide a regular number of cylindrical rollers into the respective housings and arrange them, and to fill each of the housings with a solid lubricant to solidify. Thus, an arc-shaped solidified body in which the cylindrical rollers are connected and integrated with a solid lubricant is manufactured for each accommodation portion.

Further, the full complement cylindrical roller bearing of the present invention comprises:
A plurality of cylindrical rollers are inserted between an inner ring and an outer ring in a state of being filled with a solid lubricant, and the number of cylindrical rollers of one or more smaller than the regular number is connected and integrated with the solid lubricant.
It is characterized in that a letter-shaped solidified body and a shortage of cylindrical rollers between both ends of the solidified body are assembled between the inner and outer rings.

Further, the full complement cylindrical roller bearing of the present invention is
A plurality of cylindrical rollers are inserted between the inner and outer rings in a state where they are filled with a solid lubricant. The solidified body is assembled between the inner and outer rings according to the number of divisions.

[0019]

1 to 5 show an embodiment of the present invention.
Will be described. The same or corresponding portions as those in FIGS. 6 to 8 are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 1, the double-row full complement cylindrical roller bearing of the present invention is a C-shaped solidified body in which the number of cylindrical rollers 3 which is one less than the regular number is connected and integrated with a solid lubricant 5. 21 (see FIGS. 2 and 3) and one cylindrical roller 3 lacking between the ends 22 of the solidified body 21 thereof are assembled between the inner and outer rings 1, 2.

In manufacturing this cylindrical roller bearing, a solid lubricant 5 is used.
When the inner and outer races 1 and 2 are not filled, a C-shaped accommodating portion 11 that substantially matches the raceway diameter dimensions of the inner and outer races 1 and 2 is formed without using the inner and outer races 1 and 2. Ingredient 12
Use The jig 12 includes a lower jig 13 and an intermediate jig 1.
4 and the upper jig 15.

The lower jig 13 integrally has a circular protrusion 17 at the center of the circular base 16 which is substantially the same as the raceway diameter which is the outer diameter of the inner ring 1. The cylindrical rollers 3 are arranged on a step surface 18 formed between the base 16 and the protrusion 17 along the peripheral wall surface of the protrusion 17. The height of the protrusion 17 on the step surface 18 is set to a dimension that substantially matches the axial length of the cylindrical roller 3.

The intermediate jig 14 has an annular shape whose inner diameter is substantially equal to the raceway diameter which is the inner diameter dimension of the outer ring 2. A projecting piece 19 having a width dimension substantially matching the outer diameter of one cylindrical roller 3 is integrally provided on a part thereof. By accommodating the intermediate jig 14 and the lower jig 13 so as to overlap each other, the accommodating portion 11 of the cylindrical roller 3 is formed. The accommodating portion 11 is C-shaped by the protruding piece 19 of the intermediate jig 14. It should be noted that solid lubricant filling holes 20 which are also air vent holes are penetratingly formed at a plurality of locations corresponding to the housing portion 11 of the lower jig 13.

Further, the upper jig 15 is the base 1 of the lower jig 13.
A disk-shaped member having an outer diameter that matches with No. 6, and is tightly attached to the lower jig 13 described above and fixed by a bolt or the like to form a housing portion 11 formed by the lower jig 13 and the intermediate jig 15. To block.

When the solid lubricant 5 is filled using the jig 12 including the lower jig 13, the intermediate jig 14 and the upper jig 15, first, the intermediate jig 14 is assembled to the lower jig 13. The cylindrical roller 3 is formed in the containing portion 11 formed by
Insert By inserting this cylindrical roller 3, the lower jig 13
The cylindrical rollers 3 are arranged along the outer diameter end surface of the protrusion 17 and the inner diameter end surface of the intermediate jig 14, and the protrusion piece 19 of the intermediate jig 14 allows the number of cylindrical rollers 3 that is one less than the regular number. Be accommodated. Then, the upper jig 15 is brought into close contact with the lower jig 13 and fixed by a bolt or the like, whereby the cylindrical roller 3
The accommodating portion 11 in which are arranged is closed.

After that, the solid lubricant filling hole 2 of the lower jig 13
The solid lubricant 5 is supplied from 0 to fill the housing portion 11, and is heated and solidified at a predetermined temperature and time. Then, after natural cooling, the solidified solid lubricant (hereinafter referred to as a solidified body) is removed from the jig. This solidified body 21 is taken out from the lower jig 13 by removing the upper jig 15 and then pulling out the intermediate jig 14, and the number of cylindrical rollers 3 which is one less than the regular number is connected by the solid lubricant 5. It has an integrated C-shape (see FIGS. 2 and 3). In this way, the solidified body 21 is C
The character shape makes it easy to assemble the inner ring 1 by utilizing the elastic deformation of the solid lubricant itself.

The C-shaped solidified body 2 thus obtained
While expanding 1 by elastic deformation of the solid lubricant itself,
It is assembled to the inner ring 1 on which the raceway surface has been ground. Then, after one cylindrical roller 3 is additionally inserted between the both ends 22 where one cylindrical roller of the solidified body 21 was lacking, the inner ring 1 is inserted from the outer side of the outer ring 2 in the axial direction, and the other inner ring 1 is Similarly, in the state where the solidified body 21 produced by the jig 12 described above is assembled, the solidified body 21 is incorporated into the outer ring 2 whose grinding of the raceway surface is completed (see FIG. 1). After that, the inner ring snap ring,
The work is completed by press-fitting the seal and filling grease.

Since the solidified body 21 is manufactured without using the inner and outer rings 1 and 2, the solidified body 21 is prepared in advance.
After grinding the inner and outer races 1 and 2, it is possible to assemble them in the same manner as a standard bearing that is not filled with a solid lubricant.

Further, in the above-described embodiment, the C-shaped solidified body 21 lacking one cylindrical roller is manufactured, but it is sufficient if at least one cylindrical roller is missing, and two or three cylindrical rollers are required. It may be a C-shaped solidified body lacking in minutes.
In that case, the width dimension of the projecting piece 19 of the intermediate jig 14 may be set to the total of the outer diameter dimension of the number of the cylindrical rollers 3 chipped, and when the solidified body 21 is assembled to the inner ring 1, the number thereof is set. The minute cylindrical roller 3 may be additionally inserted.

Furthermore, in the above, the case where the C-shaped solidified body 21 in which the cylindrical rollers 3 of which the number is smaller than the regular number by one or more is connected and integrated by the solid lubricant 5 is manufactured is explained. Also, for example, by using a jig in which a plurality of divided arc-shaped accommodation portions are formed, a regular number of cylindrical rollers 3 are divided and arranged in the respective accommodation portions,
By filling and solidifying the solid lubricant 5 in each of the accommodating parts, an arc-shaped solidified body in which the cylindrical roller 3 is connected and integrated with the solid lubricant 5 is manufactured for each accommodating part, and the plurality of circles are formed. It is also possible to incorporate an arc-shaped solidified body into the inner and outer rings 1, 2.

The solid lubricant 5 used in the method of the present invention
Is known under trade names such as "plastic grease" and "polylube", and is a lubricating composition comprising a mixture of ultra-high molecular weight polyolefin and lubricating grease. More specifically, the average molecular weight is 1 × 10 ^{6 to} 5 × 1.
After filling a mixture of 95 to 1% by weight of ultra high molecular weight polyethylene of 0 ⁶ and 5 to 99% by weight of lubricating grease having a dropping point higher than the gelation temperature of the ultra high molecular weight polyethylene with the jig 12, It is obtained by heating above the gelation temperature of high molecular weight polyethylene and then cooling to solidify (for details, see JP-B-63-23239).

As another example, the average molecular weight is 1 × 10 ^6.
To 5 × 10 ⁶ ultra-high molecular weight polyolefin powder having a dropping point higher than the gelation point of ultra-high molecular weight polyolefin of 5 to 99 wt% and a particle diameter of 1 to 100 μm
It is also possible to mix 5 to 1% by weight and disperse and hold the mixture at a temperature not lower than the gel point.

In any of the above cases, an additive such as solid wax that controls the exudation of oil may be added.

[0034]

According to the present invention, a predetermined number of cylindrical rollers are connected and integrated with a solid lubricant by using a jig without the need for inner and outer rings in the work of filling and solidifying the solid lubricant. Since the solidified body is manufactured as described above, it is possible to prepare the solidified body in advance and, after grinding the inner and outer rings, assemble it like a standard bearing that is not filled with a solid lubricant. As a result, if the solidified body is manufactured according to the production plan, the number of days required for manufacturing the bearing can be increased and the manufacturing process can be the same as the standard bearing manufacturing process without filling the solid lubricant. Also, reduction of production cost can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a full complement cylindrical roller bearing of the present invention.

FIG. 2 C used in the full complement cylindrical roller bearing of the present invention
A plan view showing a letter-shaped solidified body

FIG. 3 is a cross-sectional view showing the solidified body of FIG.

FIG. 4 is a plan view showing a jig (an upper jig is omitted) for manufacturing a C-shaped solidified body.

5 is a sectional view showing the jig of FIG.

FIG. 6 is a partial sectional view showing a conventional double-row full complement cylindrical roller bearing.

FIG. 7 is a partial cross-sectional view showing a conventional full complement cylindrical roller bearing assembly and jig.

FIG. 8 is a partial cross-sectional view showing another conventional full-roller cylindrical roller bearing assembly and jig.

[Explanation of symbols] 1 inner ring 2 outer ring 3 cylindrical roller 5 solid lubricant 11 accommodating portion 12 jig 21 solidified body

Claims (4)

[Claims] 1. A solid lubricant filling method for a full-roller type cylindrical roller bearing in which a plurality of cylindrical rollers are interposed between inner and outer rings, wherein the C-shaped housing corresponds to the raceway diameter dimension of the inner and outer rings. By using a jig that forms a part, a number of cylindrical rollers smaller than the regular number is arranged in the accommodating part, and the accommodating part is filled with a solid lubricant and solidified to solidify the cylindrical rollers. A solid lubricant filling method for a full complement cylindrical roller bearing, which is characterized in that a C-shaped solidified body connected and integrated with a lubricant is manufactured. 2. A solid lubricant filling method for a full complement cylindrical roller bearing having a plurality of cylindrical rollers interposed between an inner ring and an outer ring, which is divided into a plurality of groups corresponding to a raceway diameter dimension of the inner and outer rings. By the jig having the arc-shaped accommodating portion formed, a regular number of cylindrical rollers are divided into the accommodating portions and arranged, and the accommodating portions are filled with a solid lubricant and solidified,
A solid lubricant filling method for a full complement cylindrical roller bearing, characterized in that an arc-shaped solidified body, in which the cylindrical rollers are connected and integrated with a solid lubricant, is manufactured for each accommodation portion. 3. A full-roller type cylindrical roller bearing in which a plurality of cylindrical rollers are inserted between inner and outer rings in a state of being filled with a solid lubricant, wherein the number of cylindrical rollers is one or more smaller than the regular number. A full-roller cylindrical roller bearing, characterized in that a C-shaped solidified body integrally connected by a lubricant and a shortage of cylindrical rollers between both ends of the solidified body are assembled between the inner and outer rings. 4. A full-roller type cylindrical roller bearing in which a plurality of cylindrical rollers are inserted between inner and outer rings in a state of being filled with a solid lubricant, wherein a regular number of cylindrical rollers is divided into a plurality of solid cylindrical rollers. A full-roller cylindrical roller bearing characterized in that an arc-shaped solidified body connected and integrated with a lubricant is assembled between the inner and outer rings according to the number of divisions.