JP2001012479A - Roller bearing with stud type cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller bearing with stud type cages easily assembled and disassembled with improved load capacity. SOLUTION: This bearing 1 comprises an inner ring 3 fitted with a rotating shaft or the like; an outer ring 5 held and fixed to a housing or the like; a large number of cylindrical rollers interposed in two rows between the inner ring 3 and the outer ring 5; inner and outer annular cages 13, 15 arranged at both ends of the respective cylindrical rollers 7 and provided with studs 11 planted by pressing in or welding so as to be fitted into recessed parts 9 formed at both end faces of the cylindrical rollers 7; and a pair of locking collars 17 mounted to both ends of the outer ring 5 to axially lock the cylindrical rollers 7. Both annular cages 13, 15 are provided with hanging holes 31, 33 bored in three parts each in the same phase at spaces of 120 deg., and the hanging holes 31 of the inner annular cage 13 are formed as threaded holes, while the hanging holes 33 of the outer annular cages 15 are formed as bolt holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stud type roller bearing with a cage to which a large load or an impact load is applied, and more particularly to a technique for facilitating assembling / disassembling operations and improving a load capacity.

[0002]

2. Description of the Related Art In a reduction gear for a rolling mill, a pinion stand, a crusher, etc., a large load or an impact load is applied to each component, and the entire apparatus vibrates violently. In many cases, large assembled roller bearings with a cage are used. Roller bearings with pre-assembled cages are designed to retain the rollers by pin-type cages or stud-type cages. It has features such as holding.

A roller bearing with a stud type retainer is a bearing in which a plurality of studs for rotatably supporting a roller are held by a pair of annular retainers in which a plurality of studs are implanted.
FIG. 16 shows an example in which this is applied to a double-row cylindrical roller bearing, which is also described in documents such as Japanese Patent Publication No. 0-213140. A double-row cylindrical roller bearing (hereinafter simply referred to as a bearing) 1 shown in FIG. 16 includes an inner ring 3 in which a rotating shaft and the like are internally fitted, an outer ring 5 held and fixed to a housing and the like, and an inner ring 3 and an outer ring 5. A large number of cylindrical rollers 7 interposed in two rows, and studs 11 arranged at both ends of each cylindrical roller 7 and fitted into concave portions 9 formed at both end surfaces of these cylindrical rollers 7 are press-fitted or welded. And a pair of roller locking flanges 17 mounted on both ends of the outer race 5 to lock the cylindrical roller 7 in the axial direction. FIG. 17 (C in FIG. 16)
As shown in the enlarged view of the drawings, a retainer retaining flange 19 is further formed integrally with the end of the roller retaining flange 17 by casting, cutting, or the like. Thus, the annular retainers 13 and 15 are locked in the axial direction. Reference numeral 21 in FIG. 16 indicates a roller locking flange formed at the center of the inner peripheral surface of the outer ring 5.

[0004]

The above-mentioned roller bearing with a stud type retainer has various demands relating to the assembling / disassembling workability and the improvement of the load capacity. For example, when assembling the above-described bearing 1, the bearing weight may be large, and as shown in FIG. 18, the inner ring 3 and the outer ring 5 are placed on the base 47, and the annular holding is performed. The container 13 and the cylindrical roller 7 are inserted between the inner ring 3 and the outer ring 5. However, when such a working method is adopted, the annular retainer 13
Since the cylindrical rollers 7 are easily separated from the cylindrical rollers 7 in the axial direction, it is necessary to align the cylindrical rollers 7 one by one with respect to the studs 11 of the annular retainers 13. As a result, the assembling work is complicated and has a long time, which causes problems such as a decrease in mass productivity and an increase in product cost. Also, when disassembling for maintenance and inspection, etc.
And the cylindrical roller 7 cannot be removed integrally, which causes an increase in man-hours.

On the other hand, in the bearing 1 described above, the roller locking flange 1
By forming the retainer locking flange 19 at the end of the 7,
The load capacity had to be reduced. In general, the load capacity of a roller bearing is proportional to the total length of the roller. However, in the above-described bearing 1, the total length of the cylindrical roller 7 is reduced due to the fact that the cage locking flange 19 is integrally formed with the roller locking flange 17. The load capacity is reduced by being shortened by the thickness t of the retainer locking flange 19.
As a result, in order to obtain a desired load capacity, it is necessary to increase the size of the bearing 1, and there has been a problem that the size and weight of the mechanical device that houses the bearing 1 also increase. Although a large thrust force does not act on the annular retainer 13 due to the structure of the bearing 1, the material of the roller locking flange 17 (generally, cast iron or steel) is used.
In addition, the thickness t of the retainer locking flange 19 could not be reduced without limitation due to restrictions on processing and casting (cutting and cutting). The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stud type roller bearing with a cage that facilitates assembling and disassembling operations, improves load capacity, and the like.

[0006]

In order to solve the above problems, according to the first aspect of the present invention, a plurality of rollers having recesses formed at the centers of both end faces are provided at both ends of the rollers. In a roller bearing with a stud type retainer having a pair of annular retainers, each of which has a plurality of studs fitted into the concave portion implanted on an inner surface thereof, a rod-shaped hanging jig is inserted into the both annular retainers. Alternatively, it is proposed that suspension holes provided for locking are formed at two or more locations in the same phase. In the present invention, for example, after the rollers and the two annular retainers are connected via three rod-shaped hanging jigs, a wire or the like of an overhead crane is connected to the hanging ring portion of the rod-shaped hanging jig, and this connection is performed. The bearing is assembled or disassembled by lifting or suspending the body with respect to the outer ring and the inner ring of the bearing.

Further, in the roller bearing with stud type retainer according to claim 1, preferably, the suspension hole formed in one of the annular retainers is a bolt hole, and the suspension hole formed in the other annular retainer. Is a screw hole, for example, by using a general-purpose hanging bolt, the roller and the two annular retainers are securely connected.

According to the second aspect of the present invention, there are provided a plurality of rollers having recesses formed at the centers of both end faces, and a plurality of studs provided at both ends of the rollers and fitted in the recesses. A stud type roller having a pair of annular cages respectively implanted on side surfaces thereof and a roller locking flange formed at an end of a raceway with which the rollers are in rolling contact and locking the rollers in the axial direction. It is proposed that the bearing has a retainer retaining flange made of a metal plate, which is attached to the roller retaining flange and axially retains the annular retainer. According to the present invention, for example, the retainer locking flange made of a thin steel plate is press-fitted into the inner peripheral surface of the end portion of the roller locking flange without increasing the axial length of the roller locking flange (that is, the bearing). Thus, the cage is prevented from falling off the bearing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a front view of a roller bearing with a stud type retainer according to the first embodiment in a state in which a roller locking flange is removed, and FIG. 2 shows a half vertical sectional view of the same embodiment (A- A enlarged sectional view). As shown in these figures, the bearing 1 includes an inner ring 3 in which a rotating shaft and the like are fitted, an outer ring 5 held and fixed in a housing and the like,
A large number of cylindrical rollers 7 interposed in two rows between the inner ring 3 and the outer ring 5, and are fitted at both ends of each cylindrical roller 7 into recesses 9 formed at both end surfaces of these cylindrical rollers 7. The inner and outer annular retainers 13 and 15 in which the studs 11 are implanted by press-fitting, welding, and the like, and a pair of roller locking flanges 17 mounted on both ends of the outer ring 5 and locking the cylindrical roller 7 in the axial direction. Has become. In the case of the first embodiment, a retainer retaining flange 19 is further formed integrally with the end of the roller retaining flange 17 by casting, cutting, or the like. The vessels 13, 15 are locked in the axial direction. Reference numeral 21 in FIG. 2 indicates a roller locking flange formed at the center of the inner peripheral surface of the outer ring 5.

As shown in FIGS. 1 and 2, three suspension holes 31 and 33 are formed in the two annular retainers 13 and 15 at the same phase at intervals of 120 °, respectively. Have been. And the hanging hole 31 of the inner annular retainer 13
Are formed in the screw holes, while the suspension holes 33 of the outer annular retainer 15 are bolt holes.

Hereinafter, the operation of the first embodiment will be described with reference to the assembling process of the bearing 1 as an example. In assembling the bearing 1, the assembling worker first inserts and screws three hanging bolts 41, which are rod-shaped hanging jigs, into the hanging holes 31 and 33, as shown in FIG. Inner and outer annular retainers 13,
After being connected to the base 15, the connected body 43 is hung by the wire 45 of the overhead crane, and is positioned above the bearing 1 mounted on the base 47. Next, as shown in FIG. 4, the assembling operator gradually lowers the coupling body 43 so as to fit between the inner ring 3 and the outer ring 5 of the bearing 1, and thereafter, as shown in FIG. Then, the suspension bolt 41 is removed. As a result, the cylindrical roller 7 and the two annular retainers 13 and 15 are assembled in the bearing 1 in a regular state.
The roller locking flange 17 is fixed to the end surface of the outer race 5 using a bolt or the like.

As described above, in the first embodiment, since the cylindrical roller 7 and the two annular retainers 13 and 15 are integrated by the suspension bolts 41, the cylindrical roller 7 and the two annular retainers can be held during assembly or disassembly. Separation and dropping of the vessels 13 and 15 did not occur, and the workability of assembling and disassembling was greatly improved.
At the time of disassembly, it is needless to say that a procedure completely opposite to that at the time of assembly can be adopted.

FIG. 6 is a half longitudinal sectional view of a stud type roller bearing with a cage according to a second embodiment, and FIG. 7 is an enlarged view of a portion B in FIG. In FIGS. 7 to 15, hatching in cross-sectional portions is omitted so as not to complicate the figure and hinder the understanding. The overall configuration of the bearing 1 of the second embodiment is substantially the same as that of the first embodiment, except that a separate retainer locking flange 51 is mounted on the roller locking flange 17. ing. That is,
As shown in FIG. 7, an annular groove 53 is formed on the inner peripheral surface on the outer end side of the roller locking flange 17, and an annular retainer locking flange 51 is elastically attached to the annular groove 53. Have been. The retainer locking flange 51 is manufactured from a thin steel plate (preferably, a spring steel plate) by a press punching method, and has a notch (not shown) in a circumferential direction to facilitate the mounting in the annular groove 53. are doing.

In the second embodiment, the roller locking flange 17
Since the axial dimension of the cylindrical roller 7 is smaller than that of the conventional device described above, the ratio of the overall length of the cylindrical roller 7 to the bearing 1 can be increased, and the load capacity can be greatly improved.

FIGS. 8 and 9 show a longitudinal sectional view of a main part of a roller bearing with a stud type retainer according to the third and fourth embodiments. The overall configuration and operation of the bearing 1 of the third and fourth embodiments are substantially the same as those of the second embodiment. However, the shape of the retainer retaining flange 51 and the method of mounting it on the retaining flange 17 are different. Is different. That is, in these embodiments, the annular groove 53 is formed on the outer end surface of the roller locking flange 17, and the annular retainer locking flange 51 made of a thin steel plate is elastically mounted in the annular groove 53. .

FIGS. 10 and 11 show a longitudinal sectional view of a main part of a roller bearing with a stud type retainer according to the fifth and sixth embodiments. The overall configuration and operation of the bearing 1 of the fifth and sixth embodiments is substantially the same as that of the second embodiment,
The shape of the retainer locking flange 51 and the method of mounting the retainer locking flange 17 are different. That is, in these embodiments, the cylindrical portion 55 is formed in the retainer retaining flange 51, and the cylindrical portion 55 is fitted to the roller retaining flange 17 by a method such as press fitting or shrink fitting.
Is fixed to the inner peripheral surface or the stepped portion 57 of the second member.

FIG. 12 is a longitudinal sectional view of a main part of a roller bearing with a stud type cage according to a seventh embodiment. The overall configuration and operation of the bearing 1 according to the seventh embodiment is substantially the same as that of the fifth embodiment, but the shape of the retainer retaining flange 51 and the method of mounting on the retaining flange 17 are different. . That is, in the present embodiment, the cylindrical portion 55
In addition to the above, a flange portion 59 is formed, the cylindrical portion 55 is fitted inside the inner peripheral surface of the roller locking flange 17, and the flange portion 59 is formed on an inner peripheral surface of the roller locking flange 17. 53
Has been fitted.

FIGS. 13 and 14 are longitudinal sectional views of a main part of a stud type roller bearing with cage according to the eighth and ninth embodiments. The bearing 1 according to the eighth and ninth embodiments has substantially the same overall configuration and operation as the fifth embodiment.
The shape and operation of the retainer locking flange 51 are different. That is, in these embodiments, the retainer locking flange 51
Has an inner peripheral end extending toward the inner ring 3 to form a labyrinth with the inner peripheral surface of the inner ring 3. Reference numeral 61 in FIG.
The annular groove into which the inner peripheral end of the retainer locking flange 51 is fitted is shown. In these embodiments, the retainer locking flange 51 also serves as a dust seal for preventing dust and the like from entering the bearing 1.

FIG. 15 is a longitudinal sectional view of a main part of a stud type roller bearing with a cage according to a tenth embodiment. First
The overall configuration and operation of the bearing 1 of the zeroth embodiment is substantially the same as those of the eighth and ninth embodiments, but the function as a dust seal is further improved. That is, in this embodiment, the inner peripheral end of the retainer retaining flange 51 is in sliding contact with the inner peripheral surface of the inner ring 3, and the inner peripheral end of the retainer retaining flange 51 is
An annular spring 63 is attached for pressing against.

The description of the specific embodiment has been completed.
Aspects of the present invention are not limited to these embodiments. For example, in each of the above embodiments, the present invention is applied to a double-row cylindrical roller bearing with a stud type cage, but may be applied to a single-row roller bearing or a tapered roller bearing with a stud type cage. . In each of the above embodiments, the present invention is applied to the roller bearing with a stud type retainer having the roller locking flange and the roller locking flange on the outer ring side, but the roller locking flange and the roller on the inner ring side. You may apply to what has a locking collar part. In the first embodiment, a slotted hanging hole is formed in one of the annular cages instead of the screw, and the cylindrical roller and the annular cage are separated by a rod-shaped hanging jig having a lug that engages with the slot. They may be combined. Further, the number of the suspension holes in the first embodiment may be two or four or more, or may be applied to the stud type roller bearing with a cage in the second to tenth embodiments. Further, the specific shapes and the like of the studs and the annular retainer are not limited to the examples in the above embodiments, and can be appropriately changed according to the design convenience and the like.

[0021]

As is apparent from the above description, according to the first aspect of the present invention, a plurality of rollers having a concave portion formed at the center of both end surfaces are provided at both ends of the rollers. In a roller bearing with a stud type retainer having a pair of annular retainers, each of which has a plurality of studs fitted into the concave portion implanted on an inner surface thereof, a rod-shaped hanging jig is inserted into the both annular retainers. Or two hanging holes for locking
For example, after the rollers and the two annular retainers are connected via three rod-shaped hanging jigs, the ceiling is attached to the hanging ring portion of the rod-shaped hanging jig. By connecting the wire of the crane or the like, assembling and disassembling of the bearing can be easily performed without causing separation and dropping of the rollers and the two annular retainers.

In a preferred embodiment of the present invention, the suspension hole formed in one of the annular cages is a bolt hole, and the suspension hole formed in the other annular cage is a preferred embodiment. Is a screw hole, for example, by using a general-purpose hanging bolt, the roller and the two annular retainers are securely connected.

According to the second aspect of the present invention, there are provided a plurality of rollers having recesses formed at the centers of both end faces, and a plurality of studs arranged at both ends of the rollers and fitted in the recesses. A stud type cage having a pair of annular cages respectively implanted on the inner surfaces thereof, and a roller locking flange formed at an end of a raceway with which the rollers are in contact with each other and axially locking the rollers. The roller bearing is provided with a retainer locking flange made of a metal plate that is mounted on the roller locking flange and locks the annular retainer in the axial direction. By press-fitting the retainer locking flange made of a thin steel plate on the peripheral surface, it is possible to prevent the retainer from falling off the bearing without increasing the axial length of the roller locking flange (that is, the bearing).
The load capacity of the bearing can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a stud type roller bearing with a cage according to a first embodiment.

FIG. 2 is an enlarged sectional view taken along line AA in FIG.

FIG. 3 is an explanatory diagram showing an assembling process in the first embodiment.

FIG. 4 is an explanatory diagram showing an assembling process in the first embodiment.

FIG. 5 is an explanatory diagram showing an assembling process in the first embodiment.

FIG. 6 is a half vertical sectional view of a roller bearing with a stud type cage according to a second embodiment.

FIG. 7 is an enlarged view of a portion B in FIG. 6;

FIG. 8 is a longitudinal sectional view of a main part of a roller bearing with a stud type cage according to a third embodiment.

FIG. 9 is a longitudinal sectional view of a main part of a roller bearing with a stud type cage according to a fourth embodiment.

FIG. 10 is a longitudinal sectional view of a main part of a roller bearing with a stud type cage according to a fifth embodiment.

FIG. 11 is a longitudinal sectional view of a main part of a stud type roller bearing with a cage according to a sixth embodiment.

FIG. 12 is a longitudinal sectional view of a main part of a roller bearing with a stud type cage according to a seventh embodiment.

FIG. 13 is a longitudinal sectional view of an essential part of a stud type roller bearing with a cage according to an eighth embodiment.

FIG. 14 is a longitudinal sectional view of a main part of a roller bearing with stud type cage according to a ninth embodiment.

FIG. 15 is a longitudinal sectional view of an essential part of a stud type roller bearing with a cage according to a tenth embodiment.

FIG. 16 is a half longitudinal section of a conventional roller bearing with a stud type cage.

FIG. 17 is an enlarged view of a part C in FIG. 16;

FIG. 18 is an explanatory view showing an assembling process of a conventional roller bearing with a stud type cage.

[Explanation of symbols]

 1 Roller bearing with stud type retainer 3 Inner ring 5 Outer ring 7 Cylindrical roller 9 Depressed portion 11 Stud 13, 15 Ring retainer 17 Roller locking flange 31, 33 ‥ Hanging hole 41 ‥‥ Hanging bolt 41 51 ‥‥ Cage retaining flange 53 ‥‥ Circular groove

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Xu, 1-5-5, Kumeinuma Shinmei, Fujisawa-shi, Kanagawa F-term in NSK Ltd. (reference) 3J101 AA13 AA32 AA43 AA52 AA62 AA72 BA22 BA47 BA57 BA63 FA44 FA46 GA11 GA36

Claims (2)

[Claims] 1. A plurality of rollers having recesses formed at the centers of both end faces, and a plurality of studs arranged at both ends of the rollers and fitted into the recesses are respectively implanted on the inner side faces thereof. In a roller bearing with a stud type retainer having a pair of annular retainers, the annular retainers have hanging holes provided for inserting or locking a rod-shaped suspending jig at two or more locations in the same phase. A roller bearing with a stud type retainer, each of which is formed. 2. A plurality of rollers having recesses formed at the centers of both end surfaces, and a plurality of studs disposed at both ends of the rollers and fitted in the recesses are respectively implanted on the inner side surfaces thereof. A stud-type roller bearing having a pair of annular cages and a roller locking flange formed at an end of a raceway with which the rollers come into contact and axially locking the rollers; A stud-type roller bearing with a cage, comprising a metal plate-made cage locking flange mounted on the flange and locking the annular cage in the axial direction.