JP2000104738A - Roller retaining device for roller bearing, and assembly method for roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller retaining device for roller bearings and an assembly method for roller bearings that both ensure intrinsic functions of roller bearings and facilitate the assembly of them. SOLUTION: This roller retaining device is for roller bearings comprising an outer ring 1, an inner ring 2, a plurality of rollers 3 interposed between both rings 1 and 2, and a retainer 4 for holding the rollers 3 spaced at constant intervals along the circumferences of both rings 1 and 2, wherein the rollers 3 are axially immovable relative to the outer ring 1 and both rings 1 and 2 are to be integrated with a rotor 5. A restriction member 7 and a snap ring installed on the inner ring 2 to check any relative axial and circumferential movement between the inner ring 2 and the rollers 3 are detachable from the inner ring 2 after the roller bearing is mounted on the rotor 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for facilitating handling of a roller bearing.

[0002]

2. Description of the Related Art In a device having a rotating shaft, a rolling bearing is often used to rotatably support the rotating shaft. Roller bearings, which are one type of rolling bearings, have a characteristic that, due to their structure, they can receive a relatively large radial load and can to some extent allow relative movement in the axial direction between the inner and outer rings. FIG. 6A is a cross-sectional view showing an example of a roller bearing according to the related art in an assembled state. FIG. 6B is a sectional view of the configuration of FIG.
It is the figure cut | disconnected by the line and seen in the arrow direction.

[0003] The rolling bearing shown in FIG. 6 comprises an outer ring 1, an inner ring 2, a plurality of rollers 3 rotatably arranged between the two wheels 1, 2, and a roller 3 in the circumferential direction of the two wheels 1, 2. And retainers 4 supported at equal intervals. Here, a circumferential groove 1a having a width slightly longer than the entire length of the roller 3 is formed on the inner periphery of the outer ring 1 of the rolling bearing,
The roller 3 is disposed in the circumferential groove 1a and is rotatable in the circumferential direction. In addition, the inner ring 2 is attached to the rotating body 5 in advance by itself, and then the outer ring 1 and the like are assembled.
A roller bearing is formed.

On the other hand, the retainer 4 is attached to the inner periphery of the outer ring 1, and the central portion 4 a in the axial direction of the retainer 4 has a shape whose diameter is reduced inward in the radial direction. Here, the function of the central portion 4a will be described with reference to FIG.

[0005] As shown in FIG.
When the roller 3 is disposed between the inner ring 2 and the pocket 3 (portion for holding the roller 3) 4 b of the retainer 4 and the outer periphery of the roller 3, a slight gap is formed between the pocket 4 b and the roller 3. Rolling is ensured. However, inner ring 2
Before the outer ring 1 is attached, the rollers 3 receive a downward force based on gravity, and therefore fall out of the pockets 4b of the retainer 4 if there is no constraint.

Therefore, by reducing the diameter of the central portion 4a of the retainer 4, the distance S between the pockets 4b in the central portion 4a is made smaller than the outer diameter of the roller 3, so that even when the roller bearing is assembled, the distance S is increased. The roller 3 is prevented from dropping carelessly. At the time of assembling the rollers 3, the rollers 3 are pressed against the pockets 4b of the retainer 4, thereby deforming the central portion 4a and loading the rollers 4 into the pockets 4b. In this way, a sub-assembly composed of the outer ring 1 and the retainer 4 and the retainer 4 is formed, and is assembled on the outer periphery of the inner ring 2 attached to the rotating body 5.

[0007]

However, when such a roller bearing is used by assembling it with a rotating body having a horizontal rotating shaft, there is one problem. The function of the central portion 4a of the retainer 4 prevents the rollers 3 from dropping during assembly. However, as shown by the two-dot chain line in FIG. 6B, the rollers 3 located above are restrained by the central portion 4a. Move down to the position where However, for this reason, the PCD of the rollers 3 arranged in the circumferential direction is reduced, and as a result, a problem arises in that it is difficult to incorporate the sub-assembly such as the outer ring 1 into the inner ring 2. On the other hand, by chamfering the end of the inner ring 2, the ease of assembly can be improved to some extent, but it is not sufficient. Also, if the bearing gap is small, if the roller 3 and the inner ring 2 are twisted and the assembly is forcibly performed, the rolling surface of the roller 3 and the raceway surface of the inner ring 2 may be damaged. Will be forced to do so.

To solve such a problem, it is conceivable to integrate the inner and outer rings (that is, as an assembly of a roller bearing) and to assemble them directly to a rotating body. According to this idea, if the rollers are loaded after the inner ring and the outer ring are arranged vertically, for example, competition between the rollers and the inner ring can be effectively prevented, whereby the rolling surface of the rollers 3 and the inner ring can be prevented. No scratch or the like can be caused on the track surface of No. 2.

However, according to such a concept, if the roller and the inner ring can freely move relative to each other before the roller bearing is assembled to the rotating body, the inner ring may drop carelessly during transportation of the roller bearing, It may be difficult to assemble the body. Therefore, some means for restricting the relative movement between the roller and the inner ring is required until the roller bearing is mounted on the rotating body. On the other hand, if the relative movement of the roller and the inner ring in the axial direction is restricted, the function inherent in the roller bearing of allowing the relative movement of the inner and outer rings in the axial direction to some extent is impaired.

Accordingly, an object of the present invention is to provide a roller bearing device for a roller bearing and a method for assembling the roller bearing, which can ensure the functions inherent in the roller bearing and improve the ease of assembling the roller bearing. And

[0011]

SUMMARY OF THE INVENTION A roller holding device for a roller bearing according to the present invention comprises an outer ring, an inner ring, a plurality of rollers held between the two wheels, and the rollers are equally spaced in a circumferential direction of the two wheels. A retainer for holding, wherein the rollers are immovable in the axial direction with respect to one of the inner ring and the outer ring,
A roller holding device for a roller bearing in which the outer ring and the inner ring are integrally assembled to a rotating body, and is mounted on the other of the inner ring and the outer ring. A pressing means for disabling relative movement in at least one of the axial direction and the circumferential direction between the other wheel and the roller, wherein the pressing means is such that the roller bearing is provided on the rotating body. After being attached, it is detached from the other wheel.

The method for assembling a roller bearing according to the present invention comprises an outer ring, an inner ring, a plurality of rollers held between the two wheels, and a retainer for holding the rollers at equal intervals in a circumferential direction. The roller is not movable in the axial direction with respect to one of the outer rings, and before assembly, a roller retainer is attached to the other of the inner ring and the outer ring, and the other wheel is A method of assembling a roller bearing in which relative movement in at least one of the axial direction and the circumferential direction between the roller and the roller is disabled, wherein the outer ring and the inner ring are integrally attached to a rotating body. And a step of moving the roller relative to the other wheel by separating the roller retainer from the roller.

[0013]

According to the roller holding device for a roller bearing of the present invention,
An outer ring, an inner ring, a plurality of rollers held between the two wheels, and a retainer for holding the rollers at equal intervals in a circumferential direction of the two wheels, wherein the retainer is provided for one of the inner ring and the outer ring. A roller holding device for a roller bearing, wherein a roller is immovable in an axial direction and the outer ring and the inner ring are integrally assembled to a rotating body, wherein the inner ring and the outer ring are provided. Having a holding means for disabling relative movement in at least one of the axial direction and the circumferential direction between the other wheel and the rollers, The pressing means is detached from the other wheel after the roller bearing is attached to the rotating body. That is, since the outer ring and the inner ring are integrally assembled to the rotating body, it is possible to prevent the occurrence of scratches between the rollers and the two wheels at the time of assembling. The pressing means prevents relative movement between the roller and the other wheel to prevent the roller from dropping off. Further, after a roller bearing is attached to the rotating body, the pressing is performed. Because the means is removed,
The function of the roller bearing can be secured.

According to the method for assembling a roller bearing of the present invention, the method comprises an outer ring, an inner ring, a plurality of rollers held between the two wheels, and a retainer for holding the rollers at equal intervals in a circumferential direction, The rollers are axially immovable with respect to one of the inner ring and the outer ring, and before assembly, a roller retainer is attached to the other of the inner and outer rings, and A method of assembling a roller bearing that disables relative movement in at least one of the axial direction and the circumferential direction between the wheel and the roller, wherein the outer ring and the inner ring are integrally rotated. And the step of moving the roller relative to the other wheel by separating the roller retainer from the roller. That is, since the outer ring and the inner ring are integrally assembled to the rotating body, it is possible to prevent the occurrence of scratches between the rollers and the two wheels at the time of assembling. The pressing means prevents relative movement between the roller and the other wheel to prevent the roller from dropping off. Further, after a roller bearing is attached to the rotating body, the pressing is performed. Since the means is removed, the function of the roller bearing can be secured.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is an axial sectional view of a roller bearing including a roller holding device according to a first embodiment of the present invention, and FIG. 1B is a diagram showing the roller holding device removed. . The rolling bearing shown in FIG. 1A is similar to the rolling bearing shown in FIG.
And an inner ring 2, a plurality of rollers 3 rotatably arranged between the two wheels 1, 2, and a retainer 4 for supporting the rollers 3 at equal intervals in the circumferential direction of the two wheels 1, 2. ing. A circumferential groove 1a having a width slightly longer than the entire length of the roller 3 is formed on the inner periphery of the outer ring 1, and the roller 3 is disposed in the groove so as to roll freely. . Cage 4
Is mounted on the inner circumference of the outer ring 1, and has a shape in which a central portion 4 a of the retainer 4 in the axial direction is reduced in diameter in the radial direction.

Further, in the present embodiment, an outer peripheral groove 2a is formed on the outer periphery near the right end of the inner ring 2, and a ring-shaped retaining ring 6 is disposed in the outer peripheral groove 2a. . The right end of the roller 3 is in contact with the left side of the retaining ring 6. On the other hand, an outer peripheral groove 2b is formed on the outer periphery near the left end of the inner ring 2, and a snap ring 8 is disposed in the outer peripheral groove 2b. Between the snap rings 8 and 3, there is arranged a cylindrical restricting member 7 extending inside the retainer 4. Unlike the snap ring 6, the snap ring 8 can be detached from the outer peripheral groove 2b using a tool. A chamfer 2c is formed on the outer periphery of the left end of the inner ring 2 so that the rollers 3 and the snap ring 8 can be easily attached and detached. The retaining ring 6, the limiting member 7, and the snap ring 8 constitute a holding means.

Next, the operation of this embodiment will be described. Before assembling, the roller bearing according to the present embodiment is held in a state shown in FIG. Therefore,
The roller 3 is sandwiched between the retaining ring 6, the restricting member 7 and the snap ring 8, so that axial movement and circumferential movement of the roller 3 are restricted with respect to the inner ring 2. Of the roller 3 and the raceway surface of the inner race 2 can be prevented from fretting due to vibration or the like as much as possible.

On the other hand, the roller bearing according to the present embodiment
The state of being integrally assembled to the rotating body 5 shown by the two-dot chain line
This is shown in FIG. In FIG. 1B, after the roller bearing is assembled to the rotating body 5, the snap ring 8 is removed from the outer peripheral groove 2 b of the inner race 2, and the restricting member 7 is also pulled out from the outer circumference of the inner race 2. .
Thereby, the roller 3 is released from the restriction of the retaining ring 6, the restricting member 7 and the snap ring 8, and can freely move in the circumferential direction with respect to the inner ring 2. Therefore, the rotating body 5 is rotatably supported by the roller bearing according to the present embodiment.

Further, when the outer ring 1 is fixed to a housing (not shown), the rotating body 5 may thermally expand so as to extend to the right in FIG. In such a case, the inner ring 2 follows the thermal expansion of the rotating body 5 and
In the direction of the arrow (to the right). However, since the roller 3 is released from the restriction between the retaining ring 6, the restricting member 7 and the snap ring 8 and can freely move in the axial direction with respect to the inner ring 2, the inner ring 2 includes the roller 3 and the outer ring 1 can be arbitrarily moved to the right, so that the function of the roller bearing is effectively secured. In addition, inner ring 2
However, when the rotating body 5 moves leftward due to thermal expansion of the rotating body 5, the retaining ring 6 may be provided in the outer peripheral groove 2b.

FIG. 2 is a cross-sectional view similar to FIG. 1A, showing a configuration according to a second embodiment of the present invention.
The difference between the second embodiment and the embodiment of FIG. 1A is the shape of the inner ring. Descriptions of other points having a common configuration are omitted.

The inner ring 12 shown in FIG.
a. Therefore, the roller 3 is provided with a collar portion 12a,
By being sandwiched between the limiting member 7 and the snap ring 8, the axial movement and the circumferential movement with respect to the inner ring 2 are restricted, so that the inner ring 3 does not drop accidentally during transportation or the like. , Rolling surface of roller 3 and inner ring 2
Fretting due to vibration or the like can be prevented as much as possible on the raceway surface.

FIG. 3 is a view showing a mode in which the roller bearing according to the embodiment shown in FIG. 1 is assembled. It is assumed that the housing 23 to which the outer ring 1 is attached and the rotating body 5 to which the inner ring 2 is attached have their axial positions determined. Further, it is assumed that a ring-shaped mounting member 20 is inserted in the outer periphery of the rotating body 5 in advance. A description will be given of how to assemble the roller bearing according to the present embodiment. First, the roller bearing is integrally inserted into the outer periphery of the rotating body 5 from the left, and the right end of the inner ring 2 is fitted to the flange 5 of the rotating body 5.
Push rightward in the axial direction until abuts on a.

Next, from the left side of the roller bearing, a cylindrical mounting member 21 is inserted along the outer periphery of the outer ring 1 of the roller bearing. The mounting member 21 is pushed rightward in the axial direction until the flange 21b abuts on the left end surface of the housing 23. At the point of contact, the snap ring 8 is removed from the outer peripheral groove 2b of the inner race 2, and the restricting member 7 is also pulled out from the outer periphery of the inner race 2. Furthermore, the bolt hole 2 of the mounting member 21
1a, the bolt 22 is extended,
The attachment members 20 and 21 are connected by screwing into the screw holes 20a. When the bolt 22 is screwed, the attachment members 20 and 21 move in directions approaching each other, and finally sandwich the outer ring 1.

As described above, since the positions of the housing 23 and the rotating body 5 in the axial direction are determined, the mounting members 20 and 21 hold the outer race 1 by the screwing of the bolt 22. At this time, as shown in FIG. 3B, the roller 3 is held at a position slightly separated from the retaining ring 6.

According to the present embodiment, the rollers 3 are positively separated from the retaining ring 6 by a predetermined distance determined by the positional relationship between the housing 23 and the rotating body 5.
Therefore, even if the inner race 2 moves in either the left or right direction in FIG.
Since the roller 3 can be freely moved in the axial direction with respect to the roller 3, the function of the roller bearing is effectively ensured.

FIG. 4 is a cross-sectional view similar to FIG. 1A, showing a configuration according to a third embodiment of the present invention.
The difference between the third embodiment and the embodiment of FIG. 1A is the shape of the outer ring and the like. Descriptions of other points having a common configuration are omitted.

The roller bearing shown in FIG. 4 has a double row of rollers in order to further increase the radial load capacity. Therefore, the outer race 31 has a circumferential groove 3 for receiving the double row of rollers 3.
Since 1a and 31b are formed in series, the shape is long in the axial direction accordingly. In addition, inner ring 32
Are formed long corresponding to the outer ring 31. Cage 4
For the rollers 3, two of the same shape are used.

In the present embodiment, the right end of the right row of rollers 3 is in contact with the left side of the retaining ring 6 arranged in the outer peripheral groove 32a. On the other hand, between the snap ring 8 arranged in the outer circumferential groove 32b and the rollers 3 in the left row, a cylindrical restricting member 7 extending inside the left retainer 4 is arranged. The rollers 3 in both rows are connected to the retaining ring 6 via the outer ring 31.
And the restriction member 7 and the snap ring 8, the movement in the axial direction and the movement in the circumferential direction with respect to the inner ring 2 are restricted, so that the inner ring 3 accidentally drops during transportation or the like. In addition, the occurrence of fretting due to vibration or the like on the rolling surface of the roller 3 and the raceway surface of the inner race 2 can be prevented as much as possible.

FIG. 5 is a cross-sectional view similar to FIG. 1A, showing a configuration according to a fourth embodiment of the present invention.
The difference between the fourth embodiment and the embodiment of FIG. 1A is the shape of the inner ring. Descriptions of other points having a common configuration are omitted.

In the present embodiment, a snap ring 48 is provided in an outer peripheral groove 2b formed near the left end of the inner ring 2.
, But the limiting member 7 is not provided.
The outer edge right side of the snap ring 48 is in contact with the outer ring 1. Therefore, the roller 3 includes the retaining ring 6 and the snap ring 4
8, the inner ring 2 is restricted from moving in the axial direction and the circumferential direction with respect to the inner ring 2 so that the inner ring 3 does not drop accidentally during transportation or the like. Further, fretting caused by vibration or the like on the rolling surface of the rollers 3 and the raceway surface of the inner ring 2 can be prevented as much as possible. In the present embodiment,
The retaining ring 6, the outer ring 1, and the snap ring 48 constitute a holding means.

Although the present invention has been described with reference to the embodiments, it should be understood that the present invention should not be construed as being limited to the above-described embodiments, and that modifications and improvements can be made as appropriate. is there. For example, in this embodiment,
Although the retaining ring and the snap ring as the pressing means are provided on the inner ring, the pressing means may be provided on the outer ring.
Further, the restricting member may be made of resin or metal.

[0032]

According to the roller holding device for a roller bearing of the present invention, the outer ring, the inner ring, the plurality of rollers held between the two wheels, and the rollers are held at equal intervals in the circumferential direction of the two wheels. A retainer, wherein the rollers are axially immovable with respect to one of the inner ring and the outer ring, and the outer ring and the inner ring are integrally assembled to a rotating body. A roller holding device for a roller bearing comprising:
It is adapted to be attached to the other of the inner ring and the outer ring, between the other wheel and the rollers,
Holding means for disabling relative movement in at least one of the axial direction and the circumferential direction, wherein the holding means comprises:
After the roller bearing is attached to the rotating body, it is detached from the other wheel. That is, since the outer ring and the inner ring are integrally assembled to the rotating body, it is possible to prevent the occurrence of scratches between the rollers and the two wheels at the time of assembling. The pressing means prevents relative movement between the roller and the other wheel, thereby preventing the roller from falling off and the like. Further, after a roller bearing is attached to the rotating body, the pressing is performed. Since the means is removed, the function of the roller bearing can be secured.

According to the roller bearing assembling method of the present invention, the roller bearing includes an outer ring, an inner ring, a plurality of rollers held between the two wheels, and a retainer for holding the rollers at equal intervals in a circumferential direction. The rollers are axially immovable with respect to one of the inner ring and the outer ring, and before assembly, a roller retainer is attached to the other of the inner and outer rings, and A method of assembling a roller bearing that disables relative movement in at least one of the axial direction and the circumferential direction between the wheel and the roller, wherein the outer ring and the inner ring are integrally rotated. And the step of moving the roller relative to the other wheel by separating the roller retainer from the roller. That is, since the outer ring and the inner ring are integrally assembled to the rotating body, it is possible to prevent the occurrence of scratches between the rollers and the two wheels at the time of assembling. The pressing means prevents relative movement between the roller and the other wheel to prevent the roller from dropping off. Further, after a roller bearing is attached to the rotating body, the pressing is performed. Since the means is removed, the function of the roller bearing can be secured.

[Brief description of the drawings]

FIG. 1 (a) is an axial sectional view of a roller bearing including a roller holding device according to a first embodiment of the present invention, and FIG. 1 (b) shows a state where the roller holding device is removed. FIG.

FIG. 2 is a sectional view similar to FIG. 1A, showing a configuration according to a second embodiment of the present invention.

FIG. 3 is a view showing a mode of assembling the roller bearing according to the embodiment shown in FIG. 1;

FIG. 4 is a sectional view similar to FIG. 1A, showing a configuration according to a third embodiment of the present invention.

FIG. 5 is a sectional view similar to FIG. 1A, showing a configuration according to a fourth embodiment of the present invention.

FIG. 6A is a cross-sectional view showing an example of a rolling bearing according to the related art at the time of assembly, and FIG.
FIG. 6B is a view of the configuration of FIG. 6A taken along line BB and viewed in the direction of the arrow.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 31 Outer ring 2, 12, 32 Inner ring 3 Roller 4 Cage 5 Rotating body 6 Retaining ring 7 Limiting member 8, 48 Snap ring 20, 21, Mounting member 22 Bolt 23 Housing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiko Shio, Inventor 1-5-50 Kugenuma Shinmei, Fujisawa-shi, Kanagawa Prefecture Nippon Seiko Co., Ltd. F-term in NSK Ltd. (reference) 3J017 AA10 BA10 HA02 3J101 AA13 AA32 AA42 AA52 AA62 BA34 BA44 DA16 FA35 FA46

Claims (2)

[Claims] An outer ring, an inner ring, a plurality of rollers held between the two wheels, and a retainer for holding the rollers at equal intervals in a circumferential direction of the two wheels, wherein one of the inner ring and the outer ring is provided. The rollers are not movable in the axial direction with respect to the wheel,
In a roller holding device for a roller bearing, wherein the outer ring and the inner ring are integrally assembled with a rotating body, the roller holding device is configured to be attached to the other one of the inner ring and the outer ring, Between the other wheel and the roller,
Holding means for disabling relative movement in at least one of the axial direction and the circumferential direction, wherein the pressing means is removed from the other wheel after the roller bearing is attached to the rotating body. Roller holding device for roller bearings. 2. An outer ring, an inner ring, a plurality of rollers held between the two wheels, and a retainer for holding the rollers at equal intervals in a circumferential direction, wherein one of the inner ring and the outer ring is On the other hand, the rollers are not movable in the axial direction, and before assembly, a roller retainer is attached to the other of the inner ring and the outer ring, between the other wheel and the rollers. In a method for assembling a roller bearing in which relative movement in at least one of an axial direction and a circumferential direction is disabled, a step of integrally attaching the outer ring and the inner ring to a rotating body; and By separating
Making the roller movable with respect to the other wheel.